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6103 lines
191 KiB
6103 lines
191 KiB
/*
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* 53c710 driver. Modified from Drew Eckhardts driver
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* for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk]
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* Check out PERM_OPTIONS and EXPECTED_CLOCK, which may be defined in the
|
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* relevant machine specific file (eg. mvme16x.[ch], amiga7xx.[ch]).
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* There are also currently some defines at the top of 53c7xx.scr.
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* The chip type is #defined in script_asm.pl, as well as the Makefile.
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* Host scsi ID expected to be 7 - see NCR53c7x0_init().
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*
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* I have removed the PCI code and some of the 53c8xx specific code -
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* simply to make this file smaller and easier to manage.
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*
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* MVME16x issues:
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* Problems trying to read any chip registers in NCR53c7x0_init(), as they
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* may never have been set by 16xBug (eg. If kernel has come in over tftp).
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*/
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/*
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* Adapted for Linux/m68k Amiga platforms for the A4000T/A4091 and
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* WarpEngine SCSI controllers.
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* By Alan Hourihane <alanh@fairlite.demon.co.uk>
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* Thanks to Richard Hirst for making it possible with the MVME additions
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*/
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/*
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* 53c710 rev 0 doesn't support add with carry. Rev 1 and 2 does. To
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* overcome this problem you can define FORCE_DSA_ALIGNMENT, which ensures
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* that the DSA address is always xxxxxx00. If disconnection is not allowed,
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* then the script only ever tries to add small (< 256) positive offsets to
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* DSA, so lack of carry isn't a problem. FORCE_DSA_ALIGNMENT can, of course,
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* be defined for all chip revisions at a small cost in memory usage.
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*/
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#define FORCE_DSA_ALIGNMENT
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/*
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* Selection timer does not always work on the 53c710, depending on the
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* timing at the last disconnect, if this is a problem for you, try
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* using validids as detailed below.
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*
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* Options for the NCR7xx driver
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*
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* noasync:0 - disables sync and asynchronous negotiation
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* nosync:0 - disables synchronous negotiation (does async)
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* nodisconnect:0 - disables disconnection
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* validids:0x?? - Bitmask field that disallows certain ID's.
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* - e.g. 0x03 allows ID 0,1
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* - 0x1F allows ID 0,1,2,3,4
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* opthi:n - replace top word of options with 'n'
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* optlo:n - replace bottom word of options with 'n'
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* - ALWAYS SPECIFY opthi THEN optlo <<<<<<<<<<
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*/
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/*
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* PERM_OPTIONS are driver options which will be enabled for all NCR boards
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* in the system at driver initialization time.
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*
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* Don't THINK about touching these in PERM_OPTIONS :
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* OPTION_MEMORY_MAPPED
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* 680x0 doesn't have an IO map!
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*
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* OPTION_DEBUG_TEST1
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* Test 1 does bus mastering and interrupt tests, which will help weed
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* out brain damaged main boards.
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*
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* Other PERM_OPTIONS settings are listed below. Note the actual options
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* required are set in the relevant file (mvme16x.c, amiga7xx.c, etc):
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*
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* OPTION_NO_ASYNC
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* Don't negotiate for asynchronous transfers on the first command
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* when OPTION_ALWAYS_SYNCHRONOUS is set. Useful for dain bramaged
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* devices which do something bad rather than sending a MESSAGE
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* REJECT back to us like they should if they can't cope.
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*
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* OPTION_SYNCHRONOUS
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* Enable support for synchronous transfers. Target negotiated
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* synchronous transfers will be responded to. To initiate
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* a synchronous transfer request, call
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*
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* request_synchronous (hostno, target)
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*
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* from within KGDB.
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*
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* OPTION_ALWAYS_SYNCHRONOUS
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* Negotiate for synchronous transfers with every target after
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* driver initialization or a SCSI bus reset. This is a bit dangerous,
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* since there are some dain bramaged SCSI devices which will accept
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* SDTR messages but keep talking asynchronously.
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*
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* OPTION_DISCONNECT
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* Enable support for disconnect/reconnect. To change the
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* default setting on a given host adapter, call
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*
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* request_disconnect (hostno, allow)
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*
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* where allow is non-zero to allow, 0 to disallow.
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*
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* If you really want to run 10MHz FAST SCSI-II transfers, you should
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* know that the NCR driver currently ignores parity information. Most
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* systems do 5MHz SCSI fine. I've seen a lot that have problems faster
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* than 8MHz. To play it safe, we only request 5MHz transfers.
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*
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* If you'd rather get 10MHz transfers, edit sdtr_message and change
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* the fourth byte from 50 to 25.
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*/
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/*
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* Sponsored by
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* iX Multiuser Multitasking Magazine
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* Hannover, Germany
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* hm@ix.de
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*
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* Copyright 1993, 1994, 1995 Drew Eckhardt
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* Visionary Computing
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* (Unix and Linux consulting and custom programming)
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* drew@PoohSticks.ORG
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* +1 (303) 786-7975
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*
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* TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
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*
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* For more information, please consult
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*
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* NCR53C810
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* SCSI I/O Processor
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* Programmer's Guide
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*
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* NCR 53C810
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* PCI-SCSI I/O Processor
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* Data Manual
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*
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* NCR 53C810/53C820
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* PCI-SCSI I/O Processor Design In Guide
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*
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* For literature on Symbios Logic Inc. formerly NCR, SCSI,
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* and Communication products please call (800) 334-5454 or
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* (719) 536-3300.
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*
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* PCI BIOS Specification Revision
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* PCI Local Bus Specification
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* PCI System Design Guide
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*
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* PCI Special Interest Group
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* M/S HF3-15A
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* 5200 N.E. Elam Young Parkway
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* Hillsboro, Oregon 97124-6497
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* +1 (503) 696-2000
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* +1 (800) 433-5177
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*/
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/*
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* Design issues :
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* The cumulative latency needed to propagate a read/write request
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* through the file system, buffer cache, driver stacks, SCSI host, and
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* SCSI device is ultimately the limiting factor in throughput once we
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* have a sufficiently fast host adapter.
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*
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* So, to maximize performance we want to keep the ratio of latency to data
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* transfer time to a minimum by
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* 1. Minimizing the total number of commands sent (typical command latency
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* including drive and bus mastering host overhead is as high as 4.5ms)
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* to transfer a given amount of data.
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*
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* This is accomplished by placing no arbitrary limit on the number
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* of scatter/gather buffers supported, since we can transfer 1K
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* per scatter/gather buffer without Eric's cluster patches,
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* 4K with.
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*
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* 2. Minimizing the number of fatal interrupts serviced, since
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* fatal interrupts halt the SCSI I/O processor. Basically,
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* this means offloading the practical maximum amount of processing
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* to the SCSI chip.
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*
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* On the NCR53c810/820/720, this is accomplished by using
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* interrupt-on-the-fly signals when commands complete,
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* and only handling fatal errors and SDTR / WDTR messages
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* in the host code.
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*
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* On the NCR53c710, interrupts are generated as on the NCR53c8x0,
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* only the lack of a interrupt-on-the-fly facility complicates
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* things. Also, SCSI ID registers and commands are
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* bit fielded rather than binary encoded.
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*
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* On the NCR53c700 and NCR53c700-66, operations that are done via
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* indirect, table mode on the more advanced chips must be
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* replaced by calls through a jump table which
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* acts as a surrogate for the DSA. Unfortunately, this
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* will mean that we must service an interrupt for each
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* disconnect/reconnect.
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*
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* 3. Eliminating latency by pipelining operations at the different levels.
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*
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* This driver allows a configurable number of commands to be enqueued
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* for each target/lun combination (experimentally, I have discovered
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* that two seems to work best) and will ultimately allow for
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* SCSI-II tagged queuing.
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*
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*
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* Architecture :
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* This driver is built around a Linux queue of commands waiting to
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* be executed, and a shared Linux/NCR array of commands to start. Commands
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* are transferred to the array by the run_process_issue_queue() function
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* which is called whenever a command completes.
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*
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* As commands are completed, the interrupt routine is triggered,
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* looks for commands in the linked list of completed commands with
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* valid status, removes these commands from a list of running commands,
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* calls the done routine, and flags their target/luns as not busy.
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*
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* Due to limitations in the intelligence of the NCR chips, certain
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* concessions are made. In many cases, it is easier to dynamically
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* generate/fix-up code rather than calculate on the NCR at run time.
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* So, code is generated or fixed up for
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*
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* - Handling data transfers, using a variable number of MOVE instructions
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* interspersed with CALL MSG_IN, WHEN MSGIN instructions.
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*
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* The DATAIN and DATAOUT routines are separate, so that an incorrect
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* direction can be trapped, and space isn't wasted.
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*
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* It may turn out that we're better off using some sort
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* of table indirect instruction in a loop with a variable
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* sized table on the NCR53c710 and newer chips.
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*
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* - Checking for reselection (NCR53c710 and better)
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*
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* - Handling the details of SCSI context switches (NCR53c710 and better),
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* such as reprogramming appropriate synchronous parameters,
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* removing the dsa structure from the NCR's queue of outstanding
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* commands, etc.
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*
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*/
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#include <linux/module.h>
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#include <linux/config.h>
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#include <linux/types.h>
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#include <asm/setup.h>
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#include <asm/dma.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <linux/delay.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/time.h>
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#include <linux/blkdev.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <asm/pgtable.h>
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#ifdef CONFIG_AMIGA
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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#include <asm/irq.h>
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#define BIG_ENDIAN
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#define NO_IO_SPACE
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#endif
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#ifdef CONFIG_MVME16x
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#include <asm/mvme16xhw.h>
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#define BIG_ENDIAN
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#define NO_IO_SPACE
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#define VALID_IDS
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#endif
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#ifdef CONFIG_BVME6000
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#include <asm/bvme6000hw.h>
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#define BIG_ENDIAN
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#define NO_IO_SPACE
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#define VALID_IDS
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#endif
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#include "scsi.h"
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_host.h>
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#include "53c7xx.h"
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#include <linux/stat.h>
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#include <linux/stddef.h>
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#ifdef NO_IO_SPACE
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/*
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* The following make the definitions in 53c7xx.h (write8, etc) smaller,
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* we don't have separate i/o space anyway.
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*/
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#undef inb
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#undef outb
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#undef inw
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#undef outw
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#undef inl
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#undef outl
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#define inb(x) 1
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#define inw(x) 1
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#define inl(x) 1
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#define outb(x,y) 1
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#define outw(x,y) 1
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#define outl(x,y) 1
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#endif
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|
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static int check_address (unsigned long addr, int size);
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static void dump_events (struct Scsi_Host *host, int count);
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static Scsi_Cmnd * return_outstanding_commands (struct Scsi_Host *host,
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int free, int issue);
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static void hard_reset (struct Scsi_Host *host);
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static void ncr_scsi_reset (struct Scsi_Host *host);
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static void print_lots (struct Scsi_Host *host);
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static void set_synchronous (struct Scsi_Host *host, int target, int sxfer,
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int scntl3, int now_connected);
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static int datapath_residual (struct Scsi_Host *host);
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static const char * sbcl_to_phase (int sbcl);
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static void print_progress (Scsi_Cmnd *cmd);
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static void print_queues (struct Scsi_Host *host);
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static void process_issue_queue (unsigned long flags);
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static int shutdown (struct Scsi_Host *host);
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static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int result);
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static int disable (struct Scsi_Host *host);
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static int NCR53c7xx_run_tests (struct Scsi_Host *host);
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static irqreturn_t NCR53c7x0_intr(int irq, void *dev_id, struct pt_regs * regs);
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static void NCR53c7x0_intfly (struct Scsi_Host *host);
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static int ncr_halt (struct Scsi_Host *host);
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static void intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd
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*cmd);
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static void intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd);
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static void print_dsa (struct Scsi_Host *host, u32 *dsa,
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const char *prefix);
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static int print_insn (struct Scsi_Host *host, const u32 *insn,
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const char *prefix, int kernel);
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static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd);
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static void NCR53c7x0_init_fixup (struct Scsi_Host *host);
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static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct
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NCR53c7x0_cmd *cmd);
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static void NCR53c7x0_soft_reset (struct Scsi_Host *host);
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/* Size of event list (per host adapter) */
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static int track_events = 0;
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static struct Scsi_Host *first_host = NULL; /* Head of list of NCR boards */
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static Scsi_Host_Template *the_template = NULL;
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|
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/* NCR53c710 script handling code */
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#include "53c7xx_d.h"
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#ifdef A_int_debug_sync
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#define DEBUG_SYNC_INTR A_int_debug_sync
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#endif
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int NCR53c7xx_script_len = sizeof (SCRIPT);
|
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int NCR53c7xx_dsa_len = A_dsa_end + Ent_dsa_zero - Ent_dsa_code_template;
|
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#ifdef FORCE_DSA_ALIGNMENT
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int CmdPageStart = (0 - Ent_dsa_zero - sizeof(struct NCR53c7x0_cmd)) & 0xff;
|
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#endif
|
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|
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static char *setup_strings[] =
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{"","","","","","","",""};
|
|
|
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#define MAX_SETUP_STRINGS (sizeof(setup_strings) / sizeof(char *))
|
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#define SETUP_BUFFER_SIZE 200
|
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static char setup_buffer[SETUP_BUFFER_SIZE];
|
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static char setup_used[MAX_SETUP_STRINGS];
|
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|
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void ncr53c7xx_setup (char *str, int *ints)
|
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{
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int i;
|
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char *p1, *p2;
|
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|
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p1 = setup_buffer;
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*p1 = '\0';
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if (str)
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strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
|
|
setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
|
|
p1 = setup_buffer;
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i = 0;
|
|
while (*p1 && (i < MAX_SETUP_STRINGS)) {
|
|
p2 = strchr(p1, ',');
|
|
if (p2) {
|
|
*p2 = '\0';
|
|
if (p1 != p2)
|
|
setup_strings[i] = p1;
|
|
p1 = p2 + 1;
|
|
i++;
|
|
}
|
|
else {
|
|
setup_strings[i] = p1;
|
|
break;
|
|
}
|
|
}
|
|
for (i=0; i<MAX_SETUP_STRINGS; i++)
|
|
setup_used[i] = 0;
|
|
}
|
|
|
|
|
|
/* check_setup_strings() returns index if key found, 0 if not
|
|
*/
|
|
|
|
static int check_setup_strings(char *key, int *flags, int *val, char *buf)
|
|
{
|
|
int x;
|
|
char *cp;
|
|
|
|
for (x=0; x<MAX_SETUP_STRINGS; x++) {
|
|
if (setup_used[x])
|
|
continue;
|
|
if (!strncmp(setup_strings[x], key, strlen(key)))
|
|
break;
|
|
if (!strncmp(setup_strings[x], "next", strlen("next")))
|
|
return 0;
|
|
}
|
|
if (x == MAX_SETUP_STRINGS)
|
|
return 0;
|
|
setup_used[x] = 1;
|
|
cp = setup_strings[x] + strlen(key);
|
|
*val = -1;
|
|
if (*cp != ':')
|
|
return ++x;
|
|
cp++;
|
|
if ((*cp >= '0') && (*cp <= '9')) {
|
|
*val = simple_strtoul(cp,NULL,0);
|
|
}
|
|
return ++x;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* KNOWN BUGS :
|
|
* - There is some sort of conflict when the PPP driver is compiled with
|
|
* support for 16 channels?
|
|
*
|
|
* - On systems which predate the 1.3.x initialization order change,
|
|
* the NCR driver will cause Cannot get free page messages to appear.
|
|
* These are harmless, but I don't know of an easy way to avoid them.
|
|
*
|
|
* - With OPTION_DISCONNECT, on two systems under unknown circumstances,
|
|
* we get a PHASE MISMATCH with DSA set to zero (suggests that we
|
|
* are occurring somewhere in the reselection code) where
|
|
* DSP=some value DCMD|DBC=same value.
|
|
*
|
|
* Closer inspection suggests that we may be trying to execute
|
|
* some portion of the DSA?
|
|
* scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO)
|
|
* scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO)
|
|
* scsi0 : no current command : unexpected phase MSGIN.
|
|
* DSP=0x1c46cc, DCMD|DBC=0x1c46ac, DSA=0x0
|
|
* DSPS=0x0, TEMP=0x1c3e70, DMODE=0x80
|
|
* scsi0 : DSP->
|
|
* 001c46cc : 0x001c46cc 0x00000000
|
|
* 001c46d4 : 0x001c5ea0 0x000011f8
|
|
*
|
|
* Changed the print code in the phase_mismatch handler so
|
|
* that we call print_lots to try to diagnose this.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Possible future direction of architecture for max performance :
|
|
*
|
|
* We're using a single start array for the NCR chip. This is
|
|
* sub-optimal, because we cannot add a command which would conflict with
|
|
* an executing command to this start queue, and therefore must insert the
|
|
* next command for a given I/T/L combination after the first has completed;
|
|
* incurring our interrupt latency between SCSI commands.
|
|
*
|
|
* To allow further pipelining of the NCR and host CPU operation, we want
|
|
* to set things up so that immediately on termination of a command destined
|
|
* for a given LUN, we get that LUN busy again.
|
|
*
|
|
* To do this, we need to add a 32 bit pointer to which is jumped to
|
|
* on completion of a command. If no new command is available, this
|
|
* would point to the usual DSA issue queue select routine.
|
|
*
|
|
* If one were, it would point to a per-NCR53c7x0_cmd select routine
|
|
* which starts execution immediately, inserting the command at the head
|
|
* of the start queue if the NCR chip is selected or reselected.
|
|
*
|
|
* We would change so that we keep a list of outstanding commands
|
|
* for each unit, rather than a single running_list. We'd insert
|
|
* a new command into the right running list; if the NCR didn't
|
|
* have something running for that yet, we'd put it in the
|
|
* start queue as well. Some magic needs to happen to handle the
|
|
* race condition between the first command terminating before the
|
|
* new one is written.
|
|
*
|
|
* Potential for profiling :
|
|
* Call do_gettimeofday(struct timeval *tv) to get 800ns resolution.
|
|
*/
|
|
|
|
|
|
/*
|
|
* TODO :
|
|
* 1. To support WIDE transfers, not much needs to happen. We
|
|
* should do CHMOVE instructions instead of MOVEs when
|
|
* we have scatter/gather segments of uneven length. When
|
|
* we do this, we need to handle the case where we disconnect
|
|
* between segments.
|
|
*
|
|
* 2. Currently, when Icky things happen we do a FATAL(). Instead,
|
|
* we want to do an integrity check on the parts of the NCR hostdata
|
|
* structure which were initialized at boot time; FATAL() if that
|
|
* fails, and otherwise try to recover. Keep track of how many
|
|
* times this has happened within a single SCSI command; if it
|
|
* gets excessive, then FATAL().
|
|
*
|
|
* 3. Parity checking is currently disabled, and a few things should
|
|
* happen here now that we support synchronous SCSI transfers :
|
|
* 1. On soft-reset, we shoould set the EPC (Enable Parity Checking)
|
|
* and AAP (Assert SATN/ on parity error) bits in SCNTL0.
|
|
*
|
|
* 2. We should enable the parity interrupt in the SIEN0 register.
|
|
*
|
|
* 3. intr_phase_mismatch() needs to believe that message out is
|
|
* always an "acceptable" phase to have a mismatch in. If
|
|
* the old phase was MSG_IN, we should send a MESSAGE PARITY
|
|
* error. If the old phase was something else, we should send
|
|
* a INITIATOR_DETECTED_ERROR message. Note that this could
|
|
* cause a RESTORE POINTERS message; so we should handle that
|
|
* correctly first. Instead, we should probably do an
|
|
* initiator_abort.
|
|
*
|
|
* 4. MPEE bit of CTEST4 should be set so we get interrupted if
|
|
* we detect an error.
|
|
*
|
|
*
|
|
* 5. The initial code has been tested on the NCR53c810. I don't
|
|
* have access to NCR53c700, 700-66 (Forex boards), NCR53c710
|
|
* (NCR Pentium systems), NCR53c720, NCR53c820, or NCR53c825 boards to
|
|
* finish development on those platforms.
|
|
*
|
|
* NCR53c820/825/720 - need to add wide transfer support, including WDTR
|
|
* negotiation, programming of wide transfer capabilities
|
|
* on reselection and table indirect selection.
|
|
*
|
|
* NCR53c710 - need to add fatal interrupt or GEN code for
|
|
* command completion signaling. Need to modify all
|
|
* SDID, SCID, etc. registers, and table indirect select code
|
|
* since these use bit fielded (ie 1<<target) instead of
|
|
* binary encoded target ids. Need to accommodate
|
|
* different register mappings, probably scan through
|
|
* the SCRIPT code and change the non SFBR register operand
|
|
* of all MOVE instructions.
|
|
*
|
|
* It is rather worse than this actually, the 710 corrupts
|
|
* both TEMP and DSA when you do a MOVE MEMORY. This
|
|
* screws you up all over the place. MOVE MEMORY 4 with a
|
|
* destination of DSA seems to work OK, which helps some.
|
|
* Richard Hirst richard@sleepie.demon.co.uk
|
|
*
|
|
* NCR53c700/700-66 - need to add code to refix addresses on
|
|
* every nexus change, eliminate all table indirect code,
|
|
* very messy.
|
|
*
|
|
* 6. The NCR53c7x0 series is very popular on other platforms that
|
|
* could be running Linux - ie, some high performance AMIGA SCSI
|
|
* boards use it.
|
|
*
|
|
* So, I should include #ifdef'd code so that it is
|
|
* compatible with these systems.
|
|
*
|
|
* Specifically, the little Endian assumptions I made in my
|
|
* bit fields need to change, and if the NCR doesn't see memory
|
|
* the right way, we need to provide options to reverse words
|
|
* when the scripts are relocated.
|
|
*
|
|
* 7. Use vremap() to access memory mapped boards.
|
|
*/
|
|
|
|
/*
|
|
* Allow for simultaneous existence of multiple SCSI scripts so we
|
|
* can have a single driver binary for all of the family.
|
|
*
|
|
* - one for NCR53c700 and NCR53c700-66 chips (not yet supported)
|
|
* - one for rest (only the NCR53c810, 815, 820, and 825 are currently
|
|
* supported)
|
|
*
|
|
* So that we only need two SCSI scripts, we need to modify things so
|
|
* that we fixup register accesses in READ/WRITE instructions, and
|
|
* we'll also have to accommodate the bit vs. binary encoding of IDs
|
|
* with the 7xx chips.
|
|
*/
|
|
|
|
#define ROUNDUP(adr,type) \
|
|
((void *) (((long) (adr) + sizeof(type) - 1) & ~(sizeof(type) - 1)))
|
|
|
|
|
|
/*
|
|
* Function: issue_to_cmd
|
|
*
|
|
* Purpose: convert jump instruction in issue array to NCR53c7x0_cmd
|
|
* structure pointer.
|
|
*
|
|
* Inputs; issue - pointer to start of NOP or JUMP instruction
|
|
* in issue array.
|
|
*
|
|
* Returns: pointer to command on success; 0 if opcode is NOP.
|
|
*/
|
|
|
|
static inline struct NCR53c7x0_cmd *
|
|
issue_to_cmd (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata,
|
|
u32 *issue)
|
|
{
|
|
return (issue[0] != hostdata->NOP_insn) ?
|
|
/*
|
|
* If the IF TRUE bit is set, it's a JUMP instruction. The
|
|
* operand is a bus pointer to the dsa_begin routine for this DSA. The
|
|
* dsa field of the NCR53c7x0_cmd structure starts with the
|
|
* DSA code template. By converting to a virtual address,
|
|
* subtracting the code template size, and offset of the
|
|
* dsa field, we end up with a pointer to the start of the
|
|
* structure (alternatively, we could use the
|
|
* dsa_cmnd field, an anachronism from when we weren't
|
|
* sure what the relationship between the NCR structures
|
|
* and host structures were going to be.
|
|
*/
|
|
(struct NCR53c7x0_cmd *) ((char *) bus_to_virt (issue[1]) -
|
|
(hostdata->E_dsa_code_begin - hostdata->E_dsa_code_template) -
|
|
offsetof(struct NCR53c7x0_cmd, dsa))
|
|
/* If the IF TRUE bit is not set, it's a NOP */
|
|
: NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* FIXME: we should junk these, in favor of synchronous_want and
|
|
* wide_want in the NCR53c7x0_hostdata structure.
|
|
*/
|
|
|
|
/* Template for "preferred" synchronous transfer parameters. */
|
|
|
|
static const unsigned char sdtr_message[] = {
|
|
#ifdef CONFIG_SCSI_NCR53C7xx_FAST
|
|
EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 25 /* *4ns */, 8 /* off */
|
|
#else
|
|
EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 50 /* *4ns */, 8 /* off */
|
|
#endif
|
|
};
|
|
|
|
/* Template to request asynchronous transfers */
|
|
|
|
static const unsigned char async_message[] = {
|
|
EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 0, 0 /* asynchronous */
|
|
};
|
|
|
|
/* Template for "preferred" WIDE transfer parameters */
|
|
|
|
static const unsigned char wdtr_message[] = {
|
|
EXTENDED_MESSAGE, 2 /* length */, EXTENDED_WDTR, 1 /* 2^1 bytes */
|
|
};
|
|
|
|
#if 0
|
|
/*
|
|
* Function : struct Scsi_Host *find_host (int host)
|
|
*
|
|
* Purpose : KGDB support function which translates a host number
|
|
* to a host structure.
|
|
*
|
|
* Inputs : host - number of SCSI host
|
|
*
|
|
* Returns : NULL on failure, pointer to host structure on success.
|
|
*/
|
|
|
|
static struct Scsi_Host *
|
|
find_host (int host) {
|
|
struct Scsi_Host *h;
|
|
for (h = first_host; h && h->host_no != host; h = h->next);
|
|
if (!h) {
|
|
printk (KERN_ALERT "scsi%d not found\n", host);
|
|
return NULL;
|
|
} else if (h->hostt != the_template) {
|
|
printk (KERN_ALERT "scsi%d is not a NCR board\n", host);
|
|
return NULL;
|
|
}
|
|
return h;
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Function : request_synchronous (int host, int target)
|
|
*
|
|
* Purpose : KGDB interface which will allow us to negotiate for
|
|
* synchronous transfers. This ill be replaced with a more
|
|
* integrated function; perhaps a new entry in the scsi_host
|
|
* structure, accessible via an ioctl() or perhaps /proc/scsi.
|
|
*
|
|
* Inputs : host - number of SCSI host; target - number of target.
|
|
*
|
|
* Returns : 0 when negotiation has been setup for next SCSI command,
|
|
* -1 on failure.
|
|
*/
|
|
|
|
static int
|
|
request_synchronous (int host, int target) {
|
|
struct Scsi_Host *h;
|
|
struct NCR53c7x0_hostdata *hostdata;
|
|
unsigned long flags;
|
|
if (target < 0) {
|
|
printk (KERN_ALERT "target %d is bogus\n", target);
|
|
return -1;
|
|
}
|
|
if (!(h = find_host (host)))
|
|
return -1;
|
|
else if (h->this_id == target) {
|
|
printk (KERN_ALERT "target %d is host ID\n", target);
|
|
return -1;
|
|
}
|
|
else if (target > h->max_id) {
|
|
printk (KERN_ALERT "target %d exceeds maximum of %d\n", target,
|
|
h->max_id);
|
|
return -1;
|
|
}
|
|
hostdata = (struct NCR53c7x0_hostdata *)h->hostdata[0];
|
|
|
|
local_irq_save(flags);
|
|
if (hostdata->initiate_sdtr & (1 << target)) {
|
|
local_irq_restore(flags);
|
|
printk (KERN_ALERT "target %d already doing SDTR\n", target);
|
|
return -1;
|
|
}
|
|
hostdata->initiate_sdtr |= (1 << target);
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Function : request_disconnect (int host, int on_or_off)
|
|
*
|
|
* Purpose : KGDB support function, tells us to allow or disallow
|
|
* disconnections.
|
|
*
|
|
* Inputs : host - number of SCSI host; on_or_off - non-zero to allow,
|
|
* zero to disallow.
|
|
*
|
|
* Returns : 0 on success, * -1 on failure.
|
|
*/
|
|
|
|
static int
|
|
request_disconnect (int host, int on_or_off) {
|
|
struct Scsi_Host *h;
|
|
struct NCR53c7x0_hostdata *hostdata;
|
|
if (!(h = find_host (host)))
|
|
return -1;
|
|
hostdata = (struct NCR53c7x0_hostdata *) h->hostdata[0];
|
|
if (on_or_off)
|
|
hostdata->options |= OPTION_DISCONNECT;
|
|
else
|
|
hostdata->options &= ~OPTION_DISCONNECT;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Function : static void NCR53c7x0_driver_init (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : Initialize internal structures, as required on startup, or
|
|
* after a SCSI bus reset.
|
|
*
|
|
* Inputs : host - pointer to this host adapter's structure
|
|
*/
|
|
|
|
static void
|
|
NCR53c7x0_driver_init (struct Scsi_Host *host) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
int i, j;
|
|
u32 *ncrcurrent;
|
|
|
|
for (i = 0; i < 16; ++i) {
|
|
hostdata->request_sense[i] = 0;
|
|
for (j = 0; j < 8; ++j)
|
|
hostdata->busy[i][j] = 0;
|
|
set_synchronous (host, i, /* sxfer */ 0, hostdata->saved_scntl3, 0);
|
|
}
|
|
hostdata->issue_queue = NULL;
|
|
hostdata->running_list = hostdata->finished_queue =
|
|
hostdata->ncrcurrent = NULL;
|
|
for (i = 0, ncrcurrent = (u32 *) hostdata->schedule;
|
|
i < host->can_queue; ++i, ncrcurrent += 2) {
|
|
ncrcurrent[0] = hostdata->NOP_insn;
|
|
ncrcurrent[1] = 0xdeadbeef;
|
|
}
|
|
ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | DBC_TCI_TRUE;
|
|
ncrcurrent[1] = (u32) virt_to_bus (hostdata->script) +
|
|
hostdata->E_wait_reselect;
|
|
hostdata->reconnect_dsa_head = 0;
|
|
hostdata->addr_reconnect_dsa_head = (u32)
|
|
virt_to_bus((void *) &(hostdata->reconnect_dsa_head));
|
|
hostdata->expecting_iid = 0;
|
|
hostdata->expecting_sto = 0;
|
|
if (hostdata->options & OPTION_ALWAYS_SYNCHRONOUS)
|
|
hostdata->initiate_sdtr = 0xffff;
|
|
else
|
|
hostdata->initiate_sdtr = 0;
|
|
hostdata->talked_to = 0;
|
|
hostdata->idle = 1;
|
|
}
|
|
|
|
/*
|
|
* Function : static int clock_to_ccf_710 (int clock)
|
|
*
|
|
* Purpose : Return the clock conversion factor for a given SCSI clock.
|
|
*
|
|
* Inputs : clock - SCSI clock expressed in Hz.
|
|
*
|
|
* Returns : ccf on success, -1 on failure.
|
|
*/
|
|
|
|
static int
|
|
clock_to_ccf_710 (int clock) {
|
|
if (clock <= 16666666)
|
|
return -1;
|
|
if (clock <= 25000000)
|
|
return 2; /* Divide by 1.0 */
|
|
else if (clock <= 37500000)
|
|
return 1; /* Divide by 1.5 */
|
|
else if (clock <= 50000000)
|
|
return 0; /* Divide by 2.0 */
|
|
else if (clock <= 66000000)
|
|
return 3; /* Divide by 3.0 */
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Function : static int NCR53c7x0_init (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : initialize the internal structures for a given SCSI host
|
|
*
|
|
* Inputs : host - pointer to this host adapter's structure
|
|
*
|
|
* Preconditions : when this function is called, the chip_type
|
|
* field of the hostdata structure MUST have been set.
|
|
*
|
|
* Returns : 0 on success, -1 on failure.
|
|
*/
|
|
|
|
int
|
|
NCR53c7x0_init (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
int i, ccf;
|
|
unsigned char revision;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
/*
|
|
* There are some things which we need to know about in order to provide
|
|
* a semblance of support. Print 'em if they aren't what we expect,
|
|
* otherwise don't add to the noise.
|
|
*
|
|
* -1 means we don't know what to expect.
|
|
*/
|
|
int val, flags;
|
|
char buf[32];
|
|
int expected_id = -1;
|
|
int expected_clock = -1;
|
|
int uninitialized = 0;
|
|
#ifdef NO_IO_SPACE
|
|
int expected_mapping = OPTION_MEMORY_MAPPED;
|
|
#else
|
|
int expected_mapping = OPTION_IO_MAPPED;
|
|
#endif
|
|
for (i=0;i<7;i++)
|
|
hostdata->valid_ids[i] = 1; /* Default all ID's to scan */
|
|
|
|
/* Parse commandline flags */
|
|
if (check_setup_strings("noasync",&flags,&val,buf))
|
|
{
|
|
hostdata->options |= OPTION_NO_ASYNC;
|
|
hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS);
|
|
}
|
|
|
|
if (check_setup_strings("nosync",&flags,&val,buf))
|
|
{
|
|
hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS);
|
|
}
|
|
|
|
if (check_setup_strings("nodisconnect",&flags,&val,buf))
|
|
hostdata->options &= ~OPTION_DISCONNECT;
|
|
|
|
if (check_setup_strings("validids",&flags,&val,buf))
|
|
{
|
|
for (i=0;i<7;i++)
|
|
hostdata->valid_ids[i] = val & (1<<i);
|
|
}
|
|
|
|
if ((i = check_setup_strings("next",&flags,&val,buf)))
|
|
{
|
|
while (i)
|
|
setup_used[--i] = 1;
|
|
}
|
|
|
|
if (check_setup_strings("opthi",&flags,&val,buf))
|
|
hostdata->options = (long long)val << 32;
|
|
if (check_setup_strings("optlo",&flags,&val,buf))
|
|
hostdata->options |= val;
|
|
|
|
NCR53c7x0_local_setup(host);
|
|
switch (hostdata->chip) {
|
|
case 710:
|
|
case 770:
|
|
hostdata->dstat_sir_intr = NCR53c7x0_dstat_sir_intr;
|
|
hostdata->init_save_regs = NULL;
|
|
hostdata->dsa_fixup = NCR53c7xx_dsa_fixup;
|
|
hostdata->init_fixup = NCR53c7x0_init_fixup;
|
|
hostdata->soft_reset = NCR53c7x0_soft_reset;
|
|
hostdata->run_tests = NCR53c7xx_run_tests;
|
|
expected_clock = hostdata->scsi_clock;
|
|
expected_id = 7;
|
|
break;
|
|
default:
|
|
printk ("scsi%d : chip type of %d is not supported yet, detaching.\n",
|
|
host->host_no, hostdata->chip);
|
|
scsi_unregister (host);
|
|
return -1;
|
|
}
|
|
|
|
/* Assign constants accessed by NCR */
|
|
hostdata->NCR53c7xx_zero = 0;
|
|
hostdata->NCR53c7xx_msg_reject = MESSAGE_REJECT;
|
|
hostdata->NCR53c7xx_msg_abort = ABORT;
|
|
hostdata->NCR53c7xx_msg_nop = NOP;
|
|
hostdata->NOP_insn = (DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24;
|
|
if (expected_mapping == -1 ||
|
|
(hostdata->options & (OPTION_MEMORY_MAPPED)) !=
|
|
(expected_mapping & OPTION_MEMORY_MAPPED))
|
|
printk ("scsi%d : using %s mapped access\n", host->host_no,
|
|
(hostdata->options & OPTION_MEMORY_MAPPED) ? "memory" :
|
|
"io");
|
|
|
|
hostdata->dmode = (hostdata->chip == 700 || hostdata->chip == 70066) ?
|
|
DMODE_REG_00 : DMODE_REG_10;
|
|
hostdata->istat = ((hostdata->chip / 100) == 8) ?
|
|
ISTAT_REG_800 : ISTAT_REG_700;
|
|
|
|
/* We have to assume that this may be the first access to the chip, so
|
|
* we must set EA in DCNTL. */
|
|
|
|
NCR53c7x0_write8 (DCNTL_REG, DCNTL_10_EA|DCNTL_10_COM);
|
|
|
|
|
|
/* Only the ISTAT register is readable when the NCR is running, so make
|
|
sure it's halted. */
|
|
ncr_halt(host);
|
|
|
|
/*
|
|
* XXX - the NCR53c700 uses bitfielded registers for SCID, SDID, etc,
|
|
* as does the 710 with one bit per SCSI ID. Conversely, the NCR
|
|
* uses a normal, 3 bit binary representation of these values.
|
|
*
|
|
* Get the rest of the NCR documentation, and FIND OUT where the change
|
|
* was.
|
|
*/
|
|
|
|
#if 0
|
|
/* May not be able to do this - chip my not have been set up yet */
|
|
tmp = hostdata->this_id_mask = NCR53c7x0_read8(SCID_REG);
|
|
for (host->this_id = 0; tmp != 1; tmp >>=1, ++host->this_id);
|
|
#else
|
|
host->this_id = 7;
|
|
#endif
|
|
|
|
/*
|
|
* Note : we should never encounter a board setup for ID0. So,
|
|
* if we see ID0, assume that it was uninitialized and set it
|
|
* to the industry standard 7.
|
|
*/
|
|
if (!host->this_id) {
|
|
printk("scsi%d : initiator ID was %d, changing to 7\n",
|
|
host->host_no, host->this_id);
|
|
host->this_id = 7;
|
|
hostdata->this_id_mask = 1 << 7;
|
|
uninitialized = 1;
|
|
};
|
|
|
|
if (expected_id == -1 || host->this_id != expected_id)
|
|
printk("scsi%d : using initiator ID %d\n", host->host_no,
|
|
host->this_id);
|
|
|
|
/*
|
|
* Save important registers to allow a soft reset.
|
|
*/
|
|
|
|
/*
|
|
* CTEST7 controls cache snooping, burst mode, and support for
|
|
* external differential drivers. This isn't currently used - the
|
|
* default value may not be optimal anyway.
|
|
* Even worse, it may never have been set up since reset.
|
|
*/
|
|
hostdata->saved_ctest7 = NCR53c7x0_read8(CTEST7_REG) & CTEST7_SAVE;
|
|
revision = (NCR53c7x0_read8(CTEST8_REG) & 0xF0) >> 4;
|
|
switch (revision) {
|
|
case 1: revision = 0; break;
|
|
case 2: revision = 1; break;
|
|
case 4: revision = 2; break;
|
|
case 8: revision = 3; break;
|
|
default: revision = 255; break;
|
|
}
|
|
printk("scsi%d: Revision 0x%x\n",host->host_no,revision);
|
|
|
|
if ((revision == 0 || revision == 255) && (hostdata->options & (OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS)))
|
|
{
|
|
printk ("scsi%d: Disabling sync working and disconnect/reselect\n",
|
|
host->host_no);
|
|
hostdata->options &= ~(OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS);
|
|
}
|
|
|
|
/*
|
|
* On NCR53c700 series chips, DCNTL controls the SCSI clock divisor,
|
|
* on 800 series chips, it allows for a totem-pole IRQ driver.
|
|
* NOTE saved_dcntl currently overwritten in init function.
|
|
* The value read here may be garbage anyway, MVME16x board at least
|
|
* does not initialise chip if kernel arrived via tftp.
|
|
*/
|
|
|
|
hostdata->saved_dcntl = NCR53c7x0_read8(DCNTL_REG);
|
|
|
|
/*
|
|
* DMODE controls DMA burst length, and on 700 series chips,
|
|
* 286 mode and bus width
|
|
* NOTE: On MVME16x, chip may have been reset, so this could be a
|
|
* power-on/reset default value.
|
|
*/
|
|
hostdata->saved_dmode = NCR53c7x0_read8(hostdata->dmode);
|
|
|
|
/*
|
|
* Now that burst length and enabled/disabled status is known,
|
|
* clue the user in on it.
|
|
*/
|
|
|
|
ccf = clock_to_ccf_710 (expected_clock);
|
|
|
|
for (i = 0; i < 16; ++i)
|
|
hostdata->cmd_allocated[i] = 0;
|
|
|
|
if (hostdata->init_save_regs)
|
|
hostdata->init_save_regs (host);
|
|
if (hostdata->init_fixup)
|
|
hostdata->init_fixup (host);
|
|
|
|
if (!the_template) {
|
|
the_template = host->hostt;
|
|
first_host = host;
|
|
}
|
|
|
|
/*
|
|
* Linux SCSI drivers have always been plagued with initialization
|
|
* problems - some didn't work with the BIOS disabled since they expected
|
|
* initialization from it, some didn't work when the networking code
|
|
* was enabled and registers got scrambled, etc.
|
|
*
|
|
* To avoid problems like this, in the future, we will do a soft
|
|
* reset on the SCSI chip, taking it back to a sane state.
|
|
*/
|
|
|
|
hostdata->soft_reset (host);
|
|
|
|
#if 1
|
|
hostdata->debug_count_limit = -1;
|
|
#else
|
|
hostdata->debug_count_limit = 1;
|
|
#endif
|
|
hostdata->intrs = -1;
|
|
hostdata->resets = -1;
|
|
memcpy ((void *) hostdata->synchronous_want, (void *) sdtr_message,
|
|
sizeof (hostdata->synchronous_want));
|
|
|
|
NCR53c7x0_driver_init (host);
|
|
|
|
if (request_irq(host->irq, NCR53c7x0_intr, SA_SHIRQ, "53c7xx", host))
|
|
{
|
|
printk("scsi%d : IRQ%d not free, detaching\n",
|
|
host->host_no, host->irq);
|
|
goto err_unregister;
|
|
}
|
|
|
|
if ((hostdata->run_tests && hostdata->run_tests(host) == -1) ||
|
|
(hostdata->options & OPTION_DEBUG_TESTS_ONLY)) {
|
|
/* XXX Should disable interrupts, etc. here */
|
|
goto err_free_irq;
|
|
} else {
|
|
if (host->io_port) {
|
|
host->n_io_port = 128;
|
|
if (!request_region (host->io_port, host->n_io_port, "ncr53c7xx"))
|
|
goto err_free_irq;
|
|
}
|
|
}
|
|
|
|
if (NCR53c7x0_read8 (SBCL_REG) & SBCL_BSY) {
|
|
printk ("scsi%d : bus wedge, doing SCSI reset\n", host->host_no);
|
|
hard_reset (host);
|
|
}
|
|
return 0;
|
|
|
|
err_free_irq:
|
|
free_irq(host->irq, NCR53c7x0_intr);
|
|
err_unregister:
|
|
scsi_unregister(host);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Function : int ncr53c7xx_init(Scsi_Host_Template *tpnt, int board, int chip,
|
|
* unsigned long base, int io_port, int irq, int dma, long long options,
|
|
* int clock);
|
|
*
|
|
* Purpose : initializes a NCR53c7,8x0 based on base addresses,
|
|
* IRQ, and DMA channel.
|
|
*
|
|
* Inputs : tpnt - Template for this SCSI adapter, board - board level
|
|
* product, chip - 710
|
|
*
|
|
* Returns : 0 on success, -1 on failure.
|
|
*
|
|
*/
|
|
|
|
int
|
|
ncr53c7xx_init (Scsi_Host_Template *tpnt, int board, int chip,
|
|
unsigned long base, int io_port, int irq, int dma,
|
|
long long options, int clock)
|
|
{
|
|
struct Scsi_Host *instance;
|
|
struct NCR53c7x0_hostdata *hostdata;
|
|
char chip_str[80];
|
|
int script_len = 0, dsa_len = 0, size = 0, max_cmd_size = 0,
|
|
schedule_size = 0, ok = 0;
|
|
void *tmp;
|
|
unsigned long page;
|
|
|
|
switch (chip) {
|
|
case 710:
|
|
case 770:
|
|
schedule_size = (tpnt->can_queue + 1) * 8 /* JUMP instruction size */;
|
|
script_len = NCR53c7xx_script_len;
|
|
dsa_len = NCR53c7xx_dsa_len;
|
|
options |= OPTION_INTFLY;
|
|
sprintf (chip_str, "NCR53c%d", chip);
|
|
break;
|
|
default:
|
|
printk("scsi-ncr53c7xx : unsupported SCSI chip %d\n", chip);
|
|
return -1;
|
|
}
|
|
|
|
printk("scsi-ncr53c7xx : %s at memory 0x%lx, io 0x%x, irq %d",
|
|
chip_str, base, io_port, irq);
|
|
if (dma == DMA_NONE)
|
|
printk("\n");
|
|
else
|
|
printk(", dma %d\n", dma);
|
|
|
|
if (options & OPTION_DEBUG_PROBE_ONLY) {
|
|
printk ("scsi-ncr53c7xx : probe only enabled, aborting initialization\n");
|
|
return -1;
|
|
}
|
|
|
|
max_cmd_size = sizeof(struct NCR53c7x0_cmd) + dsa_len +
|
|
/* Size of dynamic part of command structure : */
|
|
2 * /* Worst case : we don't know if we need DATA IN or DATA out */
|
|
( 2 * /* Current instructions per scatter/gather segment */
|
|
tpnt->sg_tablesize +
|
|
3 /* Current startup / termination required per phase */
|
|
) *
|
|
8 /* Each instruction is eight bytes */;
|
|
|
|
/* Allocate fixed part of hostdata, dynamic part to hold appropriate
|
|
SCSI SCRIPT(tm) plus a single, maximum-sized NCR53c7x0_cmd structure.
|
|
|
|
We need a NCR53c7x0_cmd structure for scan_scsis() when we are
|
|
not loaded as a module, and when we're loaded as a module, we
|
|
can't use a non-dynamically allocated structure because modules
|
|
are vmalloc()'d, which can allow structures to cross page
|
|
boundaries and breaks our physical/virtual address assumptions
|
|
for DMA.
|
|
|
|
So, we stick it past the end of our hostdata structure.
|
|
|
|
ASSUMPTION :
|
|
Regardless of how many simultaneous SCSI commands we allow,
|
|
the probe code only executes a _single_ instruction at a time,
|
|
so we only need one here, and don't need to allocate NCR53c7x0_cmd
|
|
structures for each target until we are no longer in scan_scsis
|
|
and kmalloc() has become functional (memory_init() happens
|
|
after all device driver initialization).
|
|
*/
|
|
|
|
size = sizeof(struct NCR53c7x0_hostdata) + script_len +
|
|
/* Note that alignment will be guaranteed, since we put the command
|
|
allocated at probe time after the fixed-up SCSI script, which
|
|
consists of 32 bit words, aligned on a 32 bit boundary. But
|
|
on a 64bit machine we need 8 byte alignment for hostdata->free, so
|
|
we add in another 4 bytes to take care of potential misalignment
|
|
*/
|
|
(sizeof(void *) - sizeof(u32)) + max_cmd_size + schedule_size;
|
|
|
|
page = __get_free_pages(GFP_ATOMIC,1);
|
|
if(page==0)
|
|
{
|
|
printk(KERN_ERR "53c7xx: out of memory.\n");
|
|
return -ENOMEM;
|
|
}
|
|
#ifdef FORCE_DSA_ALIGNMENT
|
|
/*
|
|
* 53c710 rev.0 doesn't have an add-with-carry instruction.
|
|
* Ensure we allocate enough memory to force DSA alignment.
|
|
*/
|
|
size += 256;
|
|
#endif
|
|
/* Size should be < 8K, so we can fit it in two pages. */
|
|
if (size > 8192) {
|
|
printk(KERN_ERR "53c7xx: hostdata > 8K\n");
|
|
return -1;
|
|
}
|
|
|
|
instance = scsi_register (tpnt, 4);
|
|
if (!instance)
|
|
{
|
|
free_page(page);
|
|
return -1;
|
|
}
|
|
instance->hostdata[0] = page;
|
|
memset((void *)instance->hostdata[0], 0, 8192);
|
|
cache_push(virt_to_phys((void *)(instance->hostdata[0])), 8192);
|
|
cache_clear(virt_to_phys((void *)(instance->hostdata[0])), 8192);
|
|
kernel_set_cachemode((void *)instance->hostdata[0], 8192, IOMAP_NOCACHE_SER);
|
|
|
|
/* FIXME : if we ever support an ISA NCR53c7xx based board, we
|
|
need to check if the chip is running in a 16 bit mode, and if so
|
|
unregister it if it is past the 16M (0x1000000) mark */
|
|
|
|
hostdata = (struct NCR53c7x0_hostdata *)instance->hostdata[0];
|
|
hostdata->size = size;
|
|
hostdata->script_count = script_len / sizeof(u32);
|
|
hostdata->board = board;
|
|
hostdata->chip = chip;
|
|
|
|
/*
|
|
* Being memory mapped is more desirable, since
|
|
*
|
|
* - Memory accesses may be faster.
|
|
*
|
|
* - The destination and source address spaces are the same for
|
|
* all instructions, meaning we don't have to twiddle dmode or
|
|
* any other registers.
|
|
*
|
|
* So, we try for memory mapped, and if we don't get it,
|
|
* we go for port mapped, and that failing we tell the user
|
|
* it can't work.
|
|
*/
|
|
|
|
if (base) {
|
|
instance->base = base;
|
|
/* Check for forced I/O mapping */
|
|
if (!(options & OPTION_IO_MAPPED)) {
|
|
options |= OPTION_MEMORY_MAPPED;
|
|
ok = 1;
|
|
}
|
|
} else {
|
|
options &= ~OPTION_MEMORY_MAPPED;
|
|
}
|
|
|
|
if (io_port) {
|
|
instance->io_port = io_port;
|
|
options |= OPTION_IO_MAPPED;
|
|
ok = 1;
|
|
} else {
|
|
options &= ~OPTION_IO_MAPPED;
|
|
}
|
|
|
|
if (!ok) {
|
|
printk ("scsi%d : not initializing, no I/O or memory mapping known \n",
|
|
instance->host_no);
|
|
scsi_unregister (instance);
|
|
return -1;
|
|
}
|
|
instance->irq = irq;
|
|
instance->dma_channel = dma;
|
|
|
|
hostdata->options = options;
|
|
hostdata->dsa_len = dsa_len;
|
|
hostdata->max_cmd_size = max_cmd_size;
|
|
hostdata->num_cmds = 1;
|
|
hostdata->scsi_clock = clock;
|
|
/* Initialize single command */
|
|
tmp = (hostdata->script + hostdata->script_count);
|
|
#ifdef FORCE_DSA_ALIGNMENT
|
|
{
|
|
void *t = ROUNDUP(tmp, void *);
|
|
if (((u32)t & 0xff) > CmdPageStart)
|
|
t = (void *)((u32)t + 255);
|
|
t = (void *)(((u32)t & ~0xff) + CmdPageStart);
|
|
hostdata->free = t;
|
|
#if 0
|
|
printk ("scsi: Registered size increased by 256 to %d\n", size);
|
|
printk ("scsi: CmdPageStart = 0x%02x\n", CmdPageStart);
|
|
printk ("scsi: tmp = 0x%08x, hostdata->free set to 0x%08x\n",
|
|
(u32)tmp, (u32)t);
|
|
#endif
|
|
}
|
|
#else
|
|
hostdata->free = ROUNDUP(tmp, void *);
|
|
#endif
|
|
hostdata->free->real = tmp;
|
|
hostdata->free->size = max_cmd_size;
|
|
hostdata->free->free = NULL;
|
|
hostdata->free->next = NULL;
|
|
hostdata->extra_allocate = 0;
|
|
|
|
/* Allocate command start code space */
|
|
hostdata->schedule = (chip == 700 || chip == 70066) ?
|
|
NULL : (u32 *) ((char *)hostdata->free + max_cmd_size);
|
|
|
|
/*
|
|
* For diagnostic purposes, we don't really care how fast things blaze.
|
|
* For profiling, we want to access the 800ns resolution system clock,
|
|
* using a 'C' call on the host processor.
|
|
*
|
|
* Therefore, there's no need for the NCR chip to directly manipulate
|
|
* this data, and we should put it wherever is most convenient for
|
|
* Linux.
|
|
*/
|
|
if (track_events)
|
|
hostdata->events = (struct NCR53c7x0_event *) (track_events ?
|
|
vmalloc (sizeof (struct NCR53c7x0_event) * track_events) : NULL);
|
|
else
|
|
hostdata->events = NULL;
|
|
|
|
if (hostdata->events) {
|
|
memset ((void *) hostdata->events, 0, sizeof(struct NCR53c7x0_event) *
|
|
track_events);
|
|
hostdata->event_size = track_events;
|
|
hostdata->event_index = 0;
|
|
} else
|
|
hostdata->event_size = 0;
|
|
|
|
return NCR53c7x0_init(instance);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function : static void NCR53c7x0_init_fixup (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : copy and fixup the SCSI SCRIPTS(tm) code for this device.
|
|
*
|
|
* Inputs : host - pointer to this host adapter's structure
|
|
*
|
|
*/
|
|
|
|
static void
|
|
NCR53c7x0_init_fixup (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
unsigned char tmp;
|
|
int i, ncr_to_memory, memory_to_ncr;
|
|
u32 base;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
|
|
/* XXX - NOTE : this code MUST be made endian aware */
|
|
/* Copy code into buffer that was allocated at detection time. */
|
|
memcpy ((void *) hostdata->script, (void *) SCRIPT,
|
|
sizeof(SCRIPT));
|
|
/* Fixup labels */
|
|
for (i = 0; i < PATCHES; ++i)
|
|
hostdata->script[LABELPATCHES[i]] +=
|
|
virt_to_bus(hostdata->script);
|
|
/* Fixup addresses of constants that used to be EXTERNAL */
|
|
|
|
patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_abort,
|
|
virt_to_bus(&(hostdata->NCR53c7xx_msg_abort)));
|
|
patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_reject,
|
|
virt_to_bus(&(hostdata->NCR53c7xx_msg_reject)));
|
|
patch_abs_32 (hostdata->script, 0, NCR53c7xx_zero,
|
|
virt_to_bus(&(hostdata->NCR53c7xx_zero)));
|
|
patch_abs_32 (hostdata->script, 0, NCR53c7xx_sink,
|
|
virt_to_bus(&(hostdata->NCR53c7xx_sink)));
|
|
patch_abs_32 (hostdata->script, 0, NOP_insn,
|
|
virt_to_bus(&(hostdata->NOP_insn)));
|
|
patch_abs_32 (hostdata->script, 0, schedule,
|
|
virt_to_bus((void *) hostdata->schedule));
|
|
|
|
/* Fixup references to external variables: */
|
|
for (i = 0; i < EXTERNAL_PATCHES_LEN; ++i)
|
|
hostdata->script[EXTERNAL_PATCHES[i].offset] +=
|
|
virt_to_bus(EXTERNAL_PATCHES[i].address);
|
|
|
|
/*
|
|
* Fixup absolutes set at boot-time.
|
|
*
|
|
* All non-code absolute variables suffixed with "dsa_" and "int_"
|
|
* are constants, and need no fixup provided the assembler has done
|
|
* it for us (I don't know what the "real" NCR assembler does in
|
|
* this case, my assembler does the right magic).
|
|
*/
|
|
|
|
patch_abs_rwri_data (hostdata->script, 0, dsa_save_data_pointer,
|
|
Ent_dsa_code_save_data_pointer - Ent_dsa_zero);
|
|
patch_abs_rwri_data (hostdata->script, 0, dsa_restore_pointers,
|
|
Ent_dsa_code_restore_pointers - Ent_dsa_zero);
|
|
patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect,
|
|
Ent_dsa_code_check_reselect - Ent_dsa_zero);
|
|
|
|
/*
|
|
* Just for the hell of it, preserve the settings of
|
|
* Burst Length and Enable Read Line bits from the DMODE
|
|
* register. Make sure SCRIPTS start automagically.
|
|
*/
|
|
|
|
#if defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000)
|
|
/* We know better what we want than 16xBug does! */
|
|
tmp = DMODE_10_BL_8 | DMODE_10_FC2;
|
|
#else
|
|
tmp = NCR53c7x0_read8(DMODE_REG_10);
|
|
tmp &= (DMODE_BL_MASK | DMODE_10_FC2 | DMODE_10_FC1 | DMODE_710_PD |
|
|
DMODE_710_UO);
|
|
#endif
|
|
|
|
if (!(hostdata->options & OPTION_MEMORY_MAPPED)) {
|
|
base = (u32) host->io_port;
|
|
memory_to_ncr = tmp|DMODE_800_DIOM;
|
|
ncr_to_memory = tmp|DMODE_800_SIOM;
|
|
} else {
|
|
base = virt_to_bus((void *)host->base);
|
|
memory_to_ncr = ncr_to_memory = tmp;
|
|
}
|
|
|
|
/* SCRATCHB_REG_10 == SCRATCHA_REG_800, as it happens */
|
|
patch_abs_32 (hostdata->script, 0, addr_scratch, base + SCRATCHA_REG_800);
|
|
patch_abs_32 (hostdata->script, 0, addr_temp, base + TEMP_REG);
|
|
patch_abs_32 (hostdata->script, 0, addr_dsa, base + DSA_REG);
|
|
|
|
/*
|
|
* I needed some variables in the script to be accessible to
|
|
* both the NCR chip and the host processor. For these variables,
|
|
* I made the arbitrary decision to store them directly in the
|
|
* hostdata structure rather than in the RELATIVE area of the
|
|
* SCRIPTS.
|
|
*/
|
|
|
|
|
|
patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_memory, tmp);
|
|
patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_ncr, memory_to_ncr);
|
|
patch_abs_rwri_data (hostdata->script, 0, dmode_ncr_to_memory, ncr_to_memory);
|
|
|
|
patch_abs_32 (hostdata->script, 0, msg_buf,
|
|
virt_to_bus((void *)&(hostdata->msg_buf)));
|
|
patch_abs_32 (hostdata->script, 0, reconnect_dsa_head,
|
|
virt_to_bus((void *)&(hostdata->reconnect_dsa_head)));
|
|
patch_abs_32 (hostdata->script, 0, addr_reconnect_dsa_head,
|
|
virt_to_bus((void *)&(hostdata->addr_reconnect_dsa_head)));
|
|
patch_abs_32 (hostdata->script, 0, reselected_identify,
|
|
virt_to_bus((void *)&(hostdata->reselected_identify)));
|
|
/* reselected_tag is currently unused */
|
|
#if 0
|
|
patch_abs_32 (hostdata->script, 0, reselected_tag,
|
|
virt_to_bus((void *)&(hostdata->reselected_tag)));
|
|
#endif
|
|
|
|
patch_abs_32 (hostdata->script, 0, test_dest,
|
|
virt_to_bus((void*)&hostdata->test_dest));
|
|
patch_abs_32 (hostdata->script, 0, test_src,
|
|
virt_to_bus(&hostdata->test_source));
|
|
patch_abs_32 (hostdata->script, 0, saved_dsa,
|
|
virt_to_bus((void *)&hostdata->saved2_dsa));
|
|
patch_abs_32 (hostdata->script, 0, emulfly,
|
|
virt_to_bus((void *)&hostdata->emulated_intfly));
|
|
|
|
patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect,
|
|
(unsigned char)(Ent_dsa_code_check_reselect - Ent_dsa_zero));
|
|
|
|
/* These are for event logging; the ncr_event enum contains the
|
|
actual interrupt numbers. */
|
|
#ifdef A_int_EVENT_SELECT
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT, (u32) EVENT_SELECT);
|
|
#endif
|
|
#ifdef A_int_EVENT_DISCONNECT
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_DISCONNECT, (u32) EVENT_DISCONNECT);
|
|
#endif
|
|
#ifdef A_int_EVENT_RESELECT
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT, (u32) EVENT_RESELECT);
|
|
#endif
|
|
#ifdef A_int_EVENT_COMPLETE
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_COMPLETE, (u32) EVENT_COMPLETE);
|
|
#endif
|
|
#ifdef A_int_EVENT_IDLE
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_IDLE, (u32) EVENT_IDLE);
|
|
#endif
|
|
#ifdef A_int_EVENT_SELECT_FAILED
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT_FAILED,
|
|
(u32) EVENT_SELECT_FAILED);
|
|
#endif
|
|
#ifdef A_int_EVENT_BEFORE_SELECT
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_BEFORE_SELECT,
|
|
(u32) EVENT_BEFORE_SELECT);
|
|
#endif
|
|
#ifdef A_int_EVENT_RESELECT_FAILED
|
|
patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT_FAILED,
|
|
(u32) EVENT_RESELECT_FAILED);
|
|
#endif
|
|
|
|
/*
|
|
* Make sure the NCR and Linux code agree on the location of
|
|
* certain fields.
|
|
*/
|
|
|
|
hostdata->E_accept_message = Ent_accept_message;
|
|
hostdata->E_command_complete = Ent_command_complete;
|
|
hostdata->E_cmdout_cmdout = Ent_cmdout_cmdout;
|
|
hostdata->E_data_transfer = Ent_data_transfer;
|
|
hostdata->E_debug_break = Ent_debug_break;
|
|
hostdata->E_dsa_code_template = Ent_dsa_code_template;
|
|
hostdata->E_dsa_code_template_end = Ent_dsa_code_template_end;
|
|
hostdata->E_end_data_transfer = Ent_end_data_transfer;
|
|
hostdata->E_initiator_abort = Ent_initiator_abort;
|
|
hostdata->E_msg_in = Ent_msg_in;
|
|
hostdata->E_other_transfer = Ent_other_transfer;
|
|
hostdata->E_other_in = Ent_other_in;
|
|
hostdata->E_other_out = Ent_other_out;
|
|
hostdata->E_reject_message = Ent_reject_message;
|
|
hostdata->E_respond_message = Ent_respond_message;
|
|
hostdata->E_select = Ent_select;
|
|
hostdata->E_select_msgout = Ent_select_msgout;
|
|
hostdata->E_target_abort = Ent_target_abort;
|
|
#ifdef Ent_test_0
|
|
hostdata->E_test_0 = Ent_test_0;
|
|
#endif
|
|
hostdata->E_test_1 = Ent_test_1;
|
|
hostdata->E_test_2 = Ent_test_2;
|
|
#ifdef Ent_test_3
|
|
hostdata->E_test_3 = Ent_test_3;
|
|
#endif
|
|
hostdata->E_wait_reselect = Ent_wait_reselect;
|
|
hostdata->E_dsa_code_begin = Ent_dsa_code_begin;
|
|
|
|
hostdata->dsa_cmdout = A_dsa_cmdout;
|
|
hostdata->dsa_cmnd = A_dsa_cmnd;
|
|
hostdata->dsa_datain = A_dsa_datain;
|
|
hostdata->dsa_dataout = A_dsa_dataout;
|
|
hostdata->dsa_end = A_dsa_end;
|
|
hostdata->dsa_msgin = A_dsa_msgin;
|
|
hostdata->dsa_msgout = A_dsa_msgout;
|
|
hostdata->dsa_msgout_other = A_dsa_msgout_other;
|
|
hostdata->dsa_next = A_dsa_next;
|
|
hostdata->dsa_select = A_dsa_select;
|
|
hostdata->dsa_start = Ent_dsa_code_template - Ent_dsa_zero;
|
|
hostdata->dsa_status = A_dsa_status;
|
|
hostdata->dsa_jump_dest = Ent_dsa_code_fix_jump - Ent_dsa_zero +
|
|
8 /* destination operand */;
|
|
|
|
/* sanity check */
|
|
if (A_dsa_fields_start != Ent_dsa_code_template_end -
|
|
Ent_dsa_zero)
|
|
printk("scsi%d : NCR dsa_fields start is %d not %d\n",
|
|
host->host_no, A_dsa_fields_start, Ent_dsa_code_template_end -
|
|
Ent_dsa_zero);
|
|
|
|
printk("scsi%d : NCR code relocated to 0x%lx (virt 0x%p)\n", host->host_no,
|
|
virt_to_bus(hostdata->script), hostdata->script);
|
|
}
|
|
|
|
/*
|
|
* Function : static int NCR53c7xx_run_tests (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : run various verification tests on the NCR chip,
|
|
* including interrupt generation, and proper bus mastering
|
|
* operation.
|
|
*
|
|
* Inputs : host - a properly initialized Scsi_Host structure
|
|
*
|
|
* Preconditions : the NCR chip must be in a halted state.
|
|
*
|
|
* Returns : 0 if all tests were successful, -1 on error.
|
|
*
|
|
*/
|
|
|
|
static int
|
|
NCR53c7xx_run_tests (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
unsigned long timeout;
|
|
u32 start;
|
|
int failed, i;
|
|
unsigned long flags;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
/* The NCR chip _must_ be idle to run the test scripts */
|
|
|
|
local_irq_save(flags);
|
|
if (!hostdata->idle) {
|
|
printk ("scsi%d : chip not idle, aborting tests\n", host->host_no);
|
|
local_irq_restore(flags);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Check for functional interrupts, this could work as an
|
|
* autoprobe routine.
|
|
*/
|
|
|
|
if ((hostdata->options & OPTION_DEBUG_TEST1) &&
|
|
hostdata->state != STATE_DISABLED) {
|
|
hostdata->idle = 0;
|
|
hostdata->test_running = 1;
|
|
hostdata->test_completed = -1;
|
|
hostdata->test_dest = 0;
|
|
hostdata->test_source = 0xdeadbeef;
|
|
start = virt_to_bus (hostdata->script) + hostdata->E_test_1;
|
|
hostdata->state = STATE_RUNNING;
|
|
printk ("scsi%d : test 1", host->host_no);
|
|
NCR53c7x0_write32 (DSP_REG, start);
|
|
if (hostdata->options & OPTION_DEBUG_TRACE)
|
|
NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM |
|
|
DCNTL_STD);
|
|
printk (" started\n");
|
|
local_irq_restore(flags);
|
|
|
|
/*
|
|
* This is currently a .5 second timeout, since (in theory) no slow
|
|
* board will take that long. In practice, we've seen one
|
|
* pentium which occassionally fails with this, but works with
|
|
* 10 times as much?
|
|
*/
|
|
|
|
timeout = jiffies + 5 * HZ / 10;
|
|
while ((hostdata->test_completed == -1) && time_before(jiffies, timeout))
|
|
barrier();
|
|
|
|
failed = 1;
|
|
if (hostdata->test_completed == -1)
|
|
printk ("scsi%d : driver test 1 timed out%s\n",host->host_no ,
|
|
(hostdata->test_dest == 0xdeadbeef) ?
|
|
" due to lost interrupt.\n"
|
|
" Please verify that the correct IRQ is being used for your board,\n"
|
|
: "");
|
|
else if (hostdata->test_completed != 1)
|
|
printk ("scsi%d : test 1 bad interrupt value (%d)\n",
|
|
host->host_no, hostdata->test_completed);
|
|
else
|
|
failed = (hostdata->test_dest != 0xdeadbeef);
|
|
|
|
if (hostdata->test_dest != 0xdeadbeef) {
|
|
printk ("scsi%d : driver test 1 read 0x%x instead of 0xdeadbeef indicating a\n"
|
|
" probable cache invalidation problem. Please configure caching\n"
|
|
" as write-through or disabled\n",
|
|
host->host_no, hostdata->test_dest);
|
|
}
|
|
|
|
if (failed) {
|
|
printk ("scsi%d : DSP = 0x%p (script at 0x%p, start at 0x%x)\n",
|
|
host->host_no, bus_to_virt(NCR53c7x0_read32(DSP_REG)),
|
|
hostdata->script, start);
|
|
printk ("scsi%d : DSPS = 0x%x\n", host->host_no,
|
|
NCR53c7x0_read32(DSPS_REG));
|
|
local_irq_restore(flags);
|
|
return -1;
|
|
}
|
|
hostdata->test_running = 0;
|
|
}
|
|
|
|
if ((hostdata->options & OPTION_DEBUG_TEST2) &&
|
|
hostdata->state != STATE_DISABLED) {
|
|
u32 dsa[48];
|
|
unsigned char identify = IDENTIFY(0, 0);
|
|
unsigned char cmd[6];
|
|
unsigned char data[36];
|
|
unsigned char status = 0xff;
|
|
unsigned char msg = 0xff;
|
|
|
|
cmd[0] = INQUIRY;
|
|
cmd[1] = cmd[2] = cmd[3] = cmd[5] = 0;
|
|
cmd[4] = sizeof(data);
|
|
|
|
dsa[2] = 1;
|
|
dsa[3] = virt_to_bus(&identify);
|
|
dsa[4] = 6;
|
|
dsa[5] = virt_to_bus(&cmd);
|
|
dsa[6] = sizeof(data);
|
|
dsa[7] = virt_to_bus(&data);
|
|
dsa[8] = 1;
|
|
dsa[9] = virt_to_bus(&status);
|
|
dsa[10] = 1;
|
|
dsa[11] = virt_to_bus(&msg);
|
|
|
|
for (i = 0; i < 6; ++i) {
|
|
#ifdef VALID_IDS
|
|
if (!hostdata->valid_ids[i])
|
|
continue;
|
|
#endif
|
|
local_irq_disable();
|
|
if (!hostdata->idle) {
|
|
printk ("scsi%d : chip not idle, aborting tests\n", host->host_no);
|
|
local_irq_restore(flags);
|
|
return -1;
|
|
}
|
|
|
|
/* 710: bit mapped scsi ID, async */
|
|
dsa[0] = (1 << i) << 16;
|
|
hostdata->idle = 0;
|
|
hostdata->test_running = 2;
|
|
hostdata->test_completed = -1;
|
|
start = virt_to_bus(hostdata->script) + hostdata->E_test_2;
|
|
hostdata->state = STATE_RUNNING;
|
|
NCR53c7x0_write32 (DSA_REG, virt_to_bus(dsa));
|
|
NCR53c7x0_write32 (DSP_REG, start);
|
|
if (hostdata->options & OPTION_DEBUG_TRACE)
|
|
NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl |
|
|
DCNTL_SSM | DCNTL_STD);
|
|
local_irq_restore(flags);
|
|
|
|
timeout = jiffies + 5 * HZ; /* arbitrary */
|
|
while ((hostdata->test_completed == -1) && time_before(jiffies, timeout))
|
|
barrier();
|
|
|
|
NCR53c7x0_write32 (DSA_REG, 0);
|
|
|
|
if (hostdata->test_completed == 2) {
|
|
data[35] = 0;
|
|
printk ("scsi%d : test 2 INQUIRY to target %d, lun 0 : %s\n",
|
|
host->host_no, i, data + 8);
|
|
printk ("scsi%d : status ", host->host_no);
|
|
scsi_print_status (status);
|
|
printk ("\nscsi%d : message ", host->host_no);
|
|
scsi_print_msg (&msg);
|
|
printk ("\n");
|
|
} else if (hostdata->test_completed == 3) {
|
|
printk("scsi%d : test 2 no connection with target %d\n",
|
|
host->host_no, i);
|
|
if (!hostdata->idle) {
|
|
printk("scsi%d : not idle\n", host->host_no);
|
|
local_irq_restore(flags);
|
|
return -1;
|
|
}
|
|
} else if (hostdata->test_completed == -1) {
|
|
printk ("scsi%d : test 2 timed out\n", host->host_no);
|
|
local_irq_restore(flags);
|
|
return -1;
|
|
}
|
|
hostdata->test_running = 0;
|
|
}
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function : static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd)
|
|
*
|
|
* Purpose : copy the NCR53c8xx dsa structure into cmd's dsa buffer,
|
|
* performing all necessary relocation.
|
|
*
|
|
* Inputs : cmd, a NCR53c7x0_cmd structure with a dsa area large
|
|
* enough to hold the NCR53c8xx dsa.
|
|
*/
|
|
|
|
static void
|
|
NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) {
|
|
Scsi_Cmnd *c = cmd->cmd;
|
|
struct Scsi_Host *host = c->device->host;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
int i;
|
|
|
|
memcpy (cmd->dsa, hostdata->script + (hostdata->E_dsa_code_template / 4),
|
|
hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template);
|
|
|
|
/*
|
|
* Note : within the NCR 'C' code, dsa points to the _start_
|
|
* of the DSA structure, and _not_ the offset of dsa_zero within
|
|
* that structure used to facilitate shorter signed offsets
|
|
* for the 8 bit ALU.
|
|
*
|
|
* The implications of this are that
|
|
*
|
|
* - 32 bit A_dsa_* absolute values require an additional
|
|
* dsa_zero added to their value to be correct, since they are
|
|
* relative to dsa_zero which is in essentially a separate
|
|
* space from the code symbols.
|
|
*
|
|
* - All other symbols require no special treatment.
|
|
*/
|
|
|
|
patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_lun, c->device->lun);
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_addr_next, virt_to_bus(&cmd->dsa_next_addr));
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_next, virt_to_bus(cmd->dsa) + Ent_dsa_zero -
|
|
Ent_dsa_code_template + A_dsa_next);
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_sync, virt_to_bus((void *)hostdata->sync[c->device->id].script));
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_sscf_710, virt_to_bus((void *)&hostdata->sync[c->device->id].sscf_710));
|
|
patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_target, 1 << c->device->id);
|
|
/* XXX - new pointer stuff */
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_addr_saved_pointer, virt_to_bus(&cmd->saved_data_pointer));
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_addr_saved_residual, virt_to_bus(&cmd->saved_residual));
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_addr_residual, virt_to_bus(&cmd->residual));
|
|
|
|
/* XXX - new start stuff */
|
|
|
|
patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
|
|
dsa_temp_addr_dsa_value, virt_to_bus(&cmd->dsa_addr));
|
|
}
|
|
|
|
/*
|
|
* Function : run_process_issue_queue (void)
|
|
*
|
|
* Purpose : insure that the coroutine is running and will process our
|
|
* request. process_issue_queue_running is checked/set here (in an
|
|
* inline function) rather than in process_issue_queue itself to reduce
|
|
* the chances of stack overflow.
|
|
*
|
|
*/
|
|
|
|
static volatile int process_issue_queue_running = 0;
|
|
|
|
static __inline__ void
|
|
run_process_issue_queue(void) {
|
|
unsigned long flags;
|
|
local_irq_save(flags);
|
|
if (!process_issue_queue_running) {
|
|
process_issue_queue_running = 1;
|
|
process_issue_queue(flags);
|
|
/*
|
|
* process_issue_queue_running is cleared in process_issue_queue
|
|
* once it can't do more work, and process_issue_queue exits with
|
|
* interrupts disabled.
|
|
*/
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* Function : static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int
|
|
* result)
|
|
*
|
|
* Purpose : mark SCSI command as finished, OR'ing the host portion
|
|
* of the result word into the result field of the corresponding
|
|
* Scsi_Cmnd structure, and removing it from the internal queues.
|
|
*
|
|
* Inputs : cmd - command, result - entire result field
|
|
*
|
|
* Preconditions : the NCR chip should be in a halted state when
|
|
* abnormal_finished is run, since it modifies structures which
|
|
* the NCR expects to have exclusive access to.
|
|
*/
|
|
|
|
static void
|
|
abnormal_finished (struct NCR53c7x0_cmd *cmd, int result) {
|
|
Scsi_Cmnd *c = cmd->cmd;
|
|
struct Scsi_Host *host = c->device->host;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
unsigned long flags;
|
|
int left, found;
|
|
volatile struct NCR53c7x0_cmd * linux_search;
|
|
volatile struct NCR53c7x0_cmd * volatile *linux_prev;
|
|
volatile u32 *ncr_prev, *ncrcurrent, ncr_search;
|
|
|
|
#if 0
|
|
printk ("scsi%d: abnormal finished\n", host->host_no);
|
|
#endif
|
|
|
|
local_irq_save(flags);
|
|
found = 0;
|
|
/*
|
|
* Traverse the NCR issue array until we find a match or run out
|
|
* of instructions. Instructions in the NCR issue array are
|
|
* either JUMP or NOP instructions, which are 2 words in length.
|
|
*/
|
|
|
|
|
|
for (found = 0, left = host->can_queue, ncrcurrent = hostdata->schedule;
|
|
left > 0; --left, ncrcurrent += 2)
|
|
{
|
|
if (issue_to_cmd (host, hostdata, (u32 *) ncrcurrent) == cmd)
|
|
{
|
|
ncrcurrent[0] = hostdata->NOP_insn;
|
|
ncrcurrent[1] = 0xdeadbeef;
|
|
++found;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Traverse the NCR reconnect list of DSA structures until we find
|
|
* a pointer to this dsa or have found too many command structures.
|
|
* We let prev point at the next field of the previous element or
|
|
* head of the list, so we don't do anything different for removing
|
|
* the head element.
|
|
*/
|
|
|
|
for (left = host->can_queue,
|
|
ncr_search = hostdata->reconnect_dsa_head,
|
|
ncr_prev = &hostdata->reconnect_dsa_head;
|
|
left >= 0 && ncr_search &&
|
|
((char*)bus_to_virt(ncr_search) + hostdata->dsa_start)
|
|
!= (char *) cmd->dsa;
|
|
ncr_prev = (u32*) ((char*)bus_to_virt(ncr_search) +
|
|
hostdata->dsa_next), ncr_search = *ncr_prev, --left);
|
|
|
|
if (left < 0)
|
|
printk("scsi%d: loop detected in ncr reconncect list\n",
|
|
host->host_no);
|
|
else if (ncr_search) {
|
|
if (found)
|
|
printk("scsi%d: scsi %ld in ncr issue array and reconnect lists\n",
|
|
host->host_no, c->pid);
|
|
else {
|
|
volatile u32 * next = (u32 *)
|
|
((char *)bus_to_virt(ncr_search) + hostdata->dsa_next);
|
|
*ncr_prev = *next;
|
|
/* If we're at the tail end of the issue queue, update that pointer too. */
|
|
found = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Traverse the host running list until we find this command or discover
|
|
* we have too many elements, pointing linux_prev at the next field of the
|
|
* linux_previous element or head of the list, search at this element.
|
|
*/
|
|
|
|
for (left = host->can_queue, linux_search = hostdata->running_list,
|
|
linux_prev = &hostdata->running_list;
|
|
left >= 0 && linux_search && linux_search != cmd;
|
|
linux_prev = &(linux_search->next),
|
|
linux_search = linux_search->next, --left);
|
|
|
|
if (left < 0)
|
|
printk ("scsi%d: loop detected in host running list for scsi pid %ld\n",
|
|
host->host_no, c->pid);
|
|
else if (linux_search) {
|
|
*linux_prev = linux_search->next;
|
|
--hostdata->busy[c->device->id][c->device->lun];
|
|
}
|
|
|
|
/* Return the NCR command structure to the free list */
|
|
cmd->next = hostdata->free;
|
|
hostdata->free = cmd;
|
|
c->host_scribble = NULL;
|
|
|
|
/* And return */
|
|
c->result = result;
|
|
c->scsi_done(c);
|
|
|
|
local_irq_restore(flags);
|
|
run_process_issue_queue();
|
|
}
|
|
|
|
/*
|
|
* Function : static void intr_break (struct Scsi_Host *host,
|
|
* struct NCR53c7x0_cmd *cmd)
|
|
*
|
|
* Purpose : Handler for breakpoint interrupts from a SCSI script
|
|
*
|
|
* Inputs : host - pointer to this host adapter's structure,
|
|
* cmd - pointer to the command (if any) dsa was pointing
|
|
* to.
|
|
*
|
|
*/
|
|
|
|
static void
|
|
intr_break (struct Scsi_Host *host, struct
|
|
NCR53c7x0_cmd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_break *bp;
|
|
#if 0
|
|
Scsi_Cmnd *c = cmd ? cmd->cmd : NULL;
|
|
#endif
|
|
u32 *dsp;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
unsigned long flags;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
/*
|
|
* Find the break point corresponding to this address, and
|
|
* dump the appropriate debugging information to standard
|
|
* output.
|
|
*/
|
|
local_irq_save(flags);
|
|
dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG));
|
|
for (bp = hostdata->breakpoints; bp && bp->address != dsp;
|
|
bp = bp->next);
|
|
if (!bp)
|
|
panic("scsi%d : break point interrupt from %p with no breakpoint!",
|
|
host->host_no, dsp);
|
|
|
|
/*
|
|
* Configure the NCR chip for manual start mode, so that we can
|
|
* point the DSP register at the instruction that follows the
|
|
* INT int_debug_break instruction.
|
|
*/
|
|
|
|
NCR53c7x0_write8 (hostdata->dmode,
|
|
NCR53c7x0_read8(hostdata->dmode)|DMODE_MAN);
|
|
|
|
/*
|
|
* And update the DSP register, using the size of the old
|
|
* instruction in bytes.
|
|
*/
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
/*
|
|
* Function : static void print_synchronous (const char *prefix,
|
|
* const unsigned char *msg)
|
|
*
|
|
* Purpose : print a pretty, user and machine parsable representation
|
|
* of a SDTR message, including the "real" parameters, data
|
|
* clock so we can tell transfer rate at a glance.
|
|
*
|
|
* Inputs ; prefix - text to prepend, msg - SDTR message (5 bytes)
|
|
*/
|
|
|
|
static void
|
|
print_synchronous (const char *prefix, const unsigned char *msg) {
|
|
if (msg[4]) {
|
|
int Hz = 1000000000 / (msg[3] * 4);
|
|
int integer = Hz / 1000000;
|
|
int fraction = (Hz - (integer * 1000000)) / 10000;
|
|
printk ("%speriod %dns offset %d %d.%02dMHz %s SCSI%s\n",
|
|
prefix, (int) msg[3] * 4, (int) msg[4], integer, fraction,
|
|
(((msg[3] * 4) < 200) ? "FAST" : "synchronous"),
|
|
(((msg[3] * 4) < 200) ? "-II" : ""));
|
|
} else
|
|
printk ("%sasynchronous SCSI\n", prefix);
|
|
}
|
|
|
|
/*
|
|
* Function : static void set_synchronous (struct Scsi_Host *host,
|
|
* int target, int sxfer, int scntl3, int now_connected)
|
|
*
|
|
* Purpose : reprogram transfers between the selected SCSI initiator and
|
|
* target with the given register values; in the indirect
|
|
* select operand, reselection script, and chip registers.
|
|
*
|
|
* Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id,
|
|
* sxfer and scntl3 - NCR registers. now_connected - if non-zero,
|
|
* we should reprogram the registers now too.
|
|
*
|
|
* NOTE: For 53c710, scntl3 is actually used for SCF bits from
|
|
* SBCL, as we don't have a SCNTL3.
|
|
*/
|
|
|
|
static void
|
|
set_synchronous (struct Scsi_Host *host, int target, int sxfer, int scntl3,
|
|
int now_connected) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
u32 *script;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
/* These are eight bit registers */
|
|
sxfer &= 0xff;
|
|
scntl3 &= 0xff;
|
|
|
|
hostdata->sync[target].sxfer_sanity = sxfer;
|
|
hostdata->sync[target].scntl3_sanity = scntl3;
|
|
|
|
/*
|
|
* HARD CODED : synchronous script is EIGHT words long. This
|
|
* must agree with 53c7.8xx.h
|
|
*/
|
|
|
|
if ((hostdata->chip != 700) && (hostdata->chip != 70066)) {
|
|
hostdata->sync[target].select_indirect = (1 << target) << 16 |
|
|
(sxfer << 8);
|
|
hostdata->sync[target].sscf_710 = scntl3;
|
|
|
|
script = (u32 *) hostdata->sync[target].script;
|
|
|
|
/* XXX - add NCR53c7x0 code to reprogram SCF bits if we want to */
|
|
script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY |
|
|
DCMD_RWRI_OP_MOVE) << 24) |
|
|
(SBCL_REG << 16) | (scntl3 << 8);
|
|
script[1] = 0;
|
|
script += 2;
|
|
|
|
script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY |
|
|
DCMD_RWRI_OP_MOVE) << 24) |
|
|
(SXFER_REG << 16) | (sxfer << 8);
|
|
script[1] = 0;
|
|
script += 2;
|
|
|
|
#ifdef DEBUG_SYNC_INTR
|
|
if (hostdata->options & OPTION_DEBUG_DISCONNECT) {
|
|
script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_INT) << 24) | DBC_TCI_TRUE;
|
|
script[1] = DEBUG_SYNC_INTR;
|
|
script += 2;
|
|
}
|
|
#endif
|
|
|
|
script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_RETURN) << 24) | DBC_TCI_TRUE;
|
|
script[1] = 0;
|
|
script += 2;
|
|
}
|
|
|
|
if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS)
|
|
printk ("scsi%d : target %d sync parameters are sxfer=0x%x, scntl3=0x%x\n",
|
|
host->host_no, target, sxfer, scntl3);
|
|
|
|
if (now_connected) {
|
|
NCR53c7x0_write8(SBCL_REG, scntl3);
|
|
NCR53c7x0_write8(SXFER_REG, sxfer);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Function : static int asynchronous (struct Scsi_Host *host, int target)
|
|
*
|
|
* Purpose : reprogram between the selected SCSI Host adapter and target
|
|
* (assumed to be currently connected) for asynchronous transfers.
|
|
*
|
|
* Inputs : host - SCSI host structure, target - numeric target ID.
|
|
*
|
|
* Preconditions : the NCR chip should be in one of the halted states
|
|
*/
|
|
|
|
static void
|
|
asynchronous (struct Scsi_Host *host, int target) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
NCR53c7x0_local_setup(host);
|
|
set_synchronous (host, target, /* no offset */ 0, hostdata->saved_scntl3,
|
|
1);
|
|
printk ("scsi%d : setting target %d to asynchronous SCSI\n",
|
|
host->host_no, target);
|
|
}
|
|
|
|
/*
|
|
* XXX - do we want to go out of our way (ie, add extra code to selection
|
|
* in the NCR53c710/NCR53c720 script) to reprogram the synchronous
|
|
* conversion bits, or can we be content in just setting the
|
|
* sxfer bits? I chose to do so [richard@sleepie.demon.co.uk]
|
|
*/
|
|
|
|
/* Table for NCR53c8xx synchronous values */
|
|
|
|
/* This table is also correct for 710, allowing that scf=4 is equivalent
|
|
* of SSCF=0 (ie use DCNTL, divide by 3) for a 50.01-66.00MHz clock.
|
|
* For any other clock values, we cannot use entries with SCF values of
|
|
* 4. I guess that for a 66MHz clock, the slowest it will set is 2MHz,
|
|
* and for a 50MHz clock, the slowest will be 2.27Mhz. Should check
|
|
* that a device doesn't try and negotiate sync below these limits!
|
|
*/
|
|
|
|
static const struct {
|
|
int div; /* Total clock divisor * 10 */
|
|
unsigned char scf; /* */
|
|
unsigned char tp; /* 4 + tp = xferp divisor */
|
|
} syncs[] = {
|
|
/* div scf tp div scf tp div scf tp */
|
|
{ 40, 1, 0}, { 50, 1, 1}, { 60, 1, 2},
|
|
{ 70, 1, 3}, { 75, 2, 1}, { 80, 1, 4},
|
|
{ 90, 1, 5}, { 100, 1, 6}, { 105, 2, 3},
|
|
{ 110, 1, 7}, { 120, 2, 4}, { 135, 2, 5},
|
|
{ 140, 3, 3}, { 150, 2, 6}, { 160, 3, 4},
|
|
{ 165, 2, 7}, { 180, 3, 5}, { 200, 3, 6},
|
|
{ 210, 4, 3}, { 220, 3, 7}, { 240, 4, 4},
|
|
{ 270, 4, 5}, { 300, 4, 6}, { 330, 4, 7}
|
|
};
|
|
|
|
/*
|
|
* Function : static void synchronous (struct Scsi_Host *host, int target,
|
|
* char *msg)
|
|
*
|
|
* Purpose : reprogram transfers between the selected SCSI initiator and
|
|
* target for synchronous SCSI transfers such that the synchronous
|
|
* offset is less than that requested and period at least as long
|
|
* as that requested. Also modify *msg such that it contains
|
|
* an appropriate response.
|
|
*
|
|
* Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id,
|
|
* msg - synchronous transfer request.
|
|
*/
|
|
|
|
|
|
static void
|
|
synchronous (struct Scsi_Host *host, int target, char *msg) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
int desire, divisor, i, limit;
|
|
unsigned char scntl3, sxfer;
|
|
/* The diagnostic message fits on one line, even with max. width integers */
|
|
char buf[80];
|
|
|
|
/* Desired transfer clock in Hz */
|
|
desire = 1000000000L / (msg[3] * 4);
|
|
/* Scale the available SCSI clock by 10 so we get tenths */
|
|
divisor = (hostdata->scsi_clock * 10) / desire;
|
|
|
|
/* NCR chips can handle at most an offset of 8 */
|
|
if (msg[4] > 8)
|
|
msg[4] = 8;
|
|
|
|
if (hostdata->options & OPTION_DEBUG_SDTR)
|
|
printk("scsi%d : optimal synchronous divisor of %d.%01d\n",
|
|
host->host_no, divisor / 10, divisor % 10);
|
|
|
|
limit = (sizeof(syncs) / sizeof(syncs[0]) -1);
|
|
for (i = 0; (i < limit) && (divisor > syncs[i].div); ++i);
|
|
|
|
if (hostdata->options & OPTION_DEBUG_SDTR)
|
|
printk("scsi%d : selected synchronous divisor of %d.%01d\n",
|
|
host->host_no, syncs[i].div / 10, syncs[i].div % 10);
|
|
|
|
msg[3] = ((1000000000L / hostdata->scsi_clock) * syncs[i].div / 10 / 4);
|
|
|
|
if (hostdata->options & OPTION_DEBUG_SDTR)
|
|
printk("scsi%d : selected synchronous period of %dns\n", host->host_no,
|
|
msg[3] * 4);
|
|
|
|
scntl3 = syncs[i].scf;
|
|
sxfer = (msg[4] << SXFER_MO_SHIFT) | (syncs[i].tp << 4);
|
|
if (hostdata->options & OPTION_DEBUG_SDTR)
|
|
printk ("scsi%d : sxfer=0x%x scntl3=0x%x\n",
|
|
host->host_no, (int) sxfer, (int) scntl3);
|
|
set_synchronous (host, target, sxfer, scntl3, 1);
|
|
sprintf (buf, "scsi%d : setting target %d to ", host->host_no, target);
|
|
print_synchronous (buf, msg);
|
|
}
|
|
|
|
/*
|
|
* Function : static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host,
|
|
* struct NCR53c7x0_cmd *cmd)
|
|
*
|
|
* Purpose : Handler for INT generated instructions for the
|
|
* NCR53c810/820 SCSI SCRIPT
|
|
*
|
|
* Inputs : host - pointer to this host adapter's structure,
|
|
* cmd - pointer to the command (if any) dsa was pointing
|
|
* to.
|
|
*
|
|
*/
|
|
|
|
static int
|
|
NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct
|
|
NCR53c7x0_cmd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
int print;
|
|
Scsi_Cmnd *c = cmd ? cmd->cmd : NULL;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
u32 dsps,*dsp; /* Argument of the INT instruction */
|
|
|
|
NCR53c7x0_local_setup(host);
|
|
dsps = NCR53c7x0_read32(DSPS_REG);
|
|
dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG));
|
|
|
|
/* RGH 150597: Frig. Commands which fail with Check Condition are
|
|
* Flagged as successful - hack dsps to indicate check condition */
|
|
#if 0
|
|
/* RGH 200597: Need to disable for BVME6000, as it gets Check Conditions
|
|
* and then dies. Seems to handle Check Condition at startup, but
|
|
* not mid kernel build. */
|
|
if (dsps == A_int_norm_emulateintfly && cmd && cmd->result == 2)
|
|
dsps = A_int_err_check_condition;
|
|
#endif
|
|
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : DSPS = 0x%x\n", host->host_no, dsps);
|
|
|
|
switch (dsps) {
|
|
case A_int_msg_1:
|
|
print = 1;
|
|
switch (hostdata->msg_buf[0]) {
|
|
/*
|
|
* Unless we've initiated synchronous negotiation, I don't
|
|
* think that this should happen.
|
|
*/
|
|
case MESSAGE_REJECT:
|
|
hostdata->dsp = hostdata->script + hostdata->E_accept_message /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
if (cmd && (cmd->flags & CMD_FLAG_SDTR)) {
|
|
printk ("scsi%d : target %d rejected SDTR\n", host->host_no,
|
|
c->device->id);
|
|
cmd->flags &= ~CMD_FLAG_SDTR;
|
|
asynchronous (host, c->device->id);
|
|
print = 0;
|
|
}
|
|
break;
|
|
case INITIATE_RECOVERY:
|
|
printk ("scsi%d : extended contingent allegiance not supported yet, rejecting\n",
|
|
host->host_no);
|
|
/* Fall through to default */
|
|
hostdata->dsp = hostdata->script + hostdata->E_reject_message /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
break;
|
|
default:
|
|
printk ("scsi%d : unsupported message, rejecting\n",
|
|
host->host_no);
|
|
hostdata->dsp = hostdata->script + hostdata->E_reject_message /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
}
|
|
if (print) {
|
|
printk ("scsi%d : received message", host->host_no);
|
|
if (c)
|
|
printk (" from target %d lun %d ", c->device->id, c->device->lun);
|
|
scsi_print_msg ((unsigned char *) hostdata->msg_buf);
|
|
printk("\n");
|
|
}
|
|
|
|
return SPECIFIC_INT_NOTHING;
|
|
|
|
|
|
case A_int_msg_sdtr:
|
|
/*
|
|
* At this point, hostdata->msg_buf contains
|
|
* 0 EXTENDED MESSAGE
|
|
* 1 length
|
|
* 2 SDTR
|
|
* 3 period * 4ns
|
|
* 4 offset
|
|
*/
|
|
|
|
if (cmd) {
|
|
char buf[80];
|
|
sprintf (buf, "scsi%d : target %d %s ", host->host_no, c->device->id,
|
|
(cmd->flags & CMD_FLAG_SDTR) ? "accepting" : "requesting");
|
|
print_synchronous (buf, (unsigned char *) hostdata->msg_buf);
|
|
|
|
/*
|
|
* Initiator initiated, won't happen unless synchronous
|
|
* transfers are enabled. If we get a SDTR message in
|
|
* response to our SDTR, we should program our parameters
|
|
* such that
|
|
* offset <= requested offset
|
|
* period >= requested period
|
|
*/
|
|
if (cmd->flags & CMD_FLAG_SDTR) {
|
|
cmd->flags &= ~CMD_FLAG_SDTR;
|
|
if (hostdata->msg_buf[4])
|
|
synchronous (host, c->device->id, (unsigned char *)
|
|
hostdata->msg_buf);
|
|
else
|
|
asynchronous (host, c->device->id);
|
|
hostdata->dsp = hostdata->script + hostdata->E_accept_message /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
return SPECIFIC_INT_NOTHING;
|
|
} else {
|
|
if (hostdata->options & OPTION_SYNCHRONOUS) {
|
|
cmd->flags |= CMD_FLAG_DID_SDTR;
|
|
synchronous (host, c->device->id, (unsigned char *)
|
|
hostdata->msg_buf);
|
|
} else {
|
|
hostdata->msg_buf[4] = 0; /* 0 offset = async */
|
|
asynchronous (host, c->device->id);
|
|
}
|
|
patch_dsa_32 (cmd->dsa, dsa_msgout_other, 0, 5);
|
|
patch_dsa_32 (cmd->dsa, dsa_msgout_other, 1, (u32)
|
|
virt_to_bus ((void *)&hostdata->msg_buf));
|
|
hostdata->dsp = hostdata->script +
|
|
hostdata->E_respond_message / sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
}
|
|
return SPECIFIC_INT_NOTHING;
|
|
}
|
|
/* Fall through to abort if we couldn't find a cmd, and
|
|
therefore a dsa structure to twiddle */
|
|
case A_int_msg_wdtr:
|
|
hostdata->dsp = hostdata->script + hostdata->E_reject_message /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
return SPECIFIC_INT_NOTHING;
|
|
case A_int_err_unexpected_phase:
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : unexpected phase\n", host->host_no);
|
|
return SPECIFIC_INT_ABORT;
|
|
case A_int_err_selected:
|
|
if ((hostdata->chip / 100) == 8)
|
|
printk ("scsi%d : selected by target %d\n", host->host_no,
|
|
(int) NCR53c7x0_read8(SDID_REG_800) &7);
|
|
else
|
|
printk ("scsi%d : selected by target LCRC=0x%02x\n", host->host_no,
|
|
(int) NCR53c7x0_read8(LCRC_REG_10));
|
|
hostdata->dsp = hostdata->script + hostdata->E_target_abort /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
return SPECIFIC_INT_NOTHING;
|
|
case A_int_err_unexpected_reselect:
|
|
if ((hostdata->chip / 100) == 8)
|
|
printk ("scsi%d : unexpected reselect by target %d lun %d\n",
|
|
host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & 7,
|
|
hostdata->reselected_identify & 7);
|
|
else
|
|
printk ("scsi%d : unexpected reselect LCRC=0x%02x\n", host->host_no,
|
|
(int) NCR53c7x0_read8(LCRC_REG_10));
|
|
hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
return SPECIFIC_INT_NOTHING;
|
|
/*
|
|
* Since contingent allegiance conditions are cleared by the next
|
|
* command issued to a target, we must issue a REQUEST SENSE
|
|
* command after receiving a CHECK CONDITION status, before
|
|
* another command is issued.
|
|
*
|
|
* Since this NCR53c7x0_cmd will be freed after use, we don't
|
|
* care if we step on the various fields, so modify a few things.
|
|
*/
|
|
case A_int_err_check_condition:
|
|
#if 0
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
#endif
|
|
printk ("scsi%d : CHECK CONDITION\n", host->host_no);
|
|
if (!c) {
|
|
printk("scsi%d : CHECK CONDITION with no SCSI command\n",
|
|
host->host_no);
|
|
return SPECIFIC_INT_PANIC;
|
|
}
|
|
|
|
/*
|
|
* FIXME : this uses the normal one-byte selection message.
|
|
* We may want to renegotiate for synchronous & WIDE transfers
|
|
* since these could be the crux of our problem.
|
|
*
|
|
hostdata->NOP_insn* FIXME : once SCSI-II tagged queuing is implemented, we'll
|
|
* have to set this up so that the rest of the DSA
|
|
* agrees with this being an untagged queue'd command.
|
|
*/
|
|
|
|
patch_dsa_32 (cmd->dsa, dsa_msgout, 0, 1);
|
|
|
|
/*
|
|
* Modify the table indirect for COMMAND OUT phase, since
|
|
* Request Sense is a six byte command.
|
|
*/
|
|
|
|
patch_dsa_32 (cmd->dsa, dsa_cmdout, 0, 6);
|
|
|
|
/*
|
|
* The CDB is now mirrored in our local non-cached
|
|
* structure, but keep the old structure up to date as well,
|
|
* just in case anyone looks at it.
|
|
*/
|
|
|
|
/*
|
|
* XXX Need to worry about data buffer alignment/cache state
|
|
* XXX here, but currently never get A_int_err_check_condition,
|
|
* XXX so ignore problem for now.
|
|
*/
|
|
cmd->cmnd[0] = c->cmnd[0] = REQUEST_SENSE;
|
|
cmd->cmnd[0] = c->cmnd[1] &= 0xe0; /* Zero all but LUN */
|
|
cmd->cmnd[0] = c->cmnd[2] = 0;
|
|
cmd->cmnd[0] = c->cmnd[3] = 0;
|
|
cmd->cmnd[0] = c->cmnd[4] = sizeof(c->sense_buffer);
|
|
cmd->cmnd[0] = c->cmnd[5] = 0;
|
|
|
|
/*
|
|
* Disable dataout phase, and program datain to transfer to the
|
|
* sense buffer, and add a jump to other_transfer after the
|
|
* command so overflow/underrun conditions are detected.
|
|
*/
|
|
|
|
patch_dsa_32 (cmd->dsa, dsa_dataout, 0,
|
|
virt_to_bus(hostdata->script) + hostdata->E_other_transfer);
|
|
patch_dsa_32 (cmd->dsa, dsa_datain, 0,
|
|
virt_to_bus(cmd->data_transfer_start));
|
|
cmd->data_transfer_start[0] = (((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I |
|
|
DCMD_BMI_IO)) << 24) | sizeof(c->sense_buffer);
|
|
cmd->data_transfer_start[1] = (u32) virt_to_bus(c->sense_buffer);
|
|
|
|
cmd->data_transfer_start[2] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP)
|
|
<< 24) | DBC_TCI_TRUE;
|
|
cmd->data_transfer_start[3] = (u32) virt_to_bus(hostdata->script) +
|
|
hostdata->E_other_transfer;
|
|
|
|
/*
|
|
* Currently, this command is flagged as completed, ie
|
|
* it has valid status and message data. Reflag it as
|
|
* incomplete. Q - need to do something so that original
|
|
* status, etc are used.
|
|
*/
|
|
|
|
cmd->result = cmd->cmd->result = 0xffff;
|
|
|
|
/*
|
|
* Restart command as a REQUEST SENSE.
|
|
*/
|
|
hostdata->dsp = (u32 *) hostdata->script + hostdata->E_select /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
return SPECIFIC_INT_NOTHING;
|
|
case A_int_debug_break:
|
|
return SPECIFIC_INT_BREAK;
|
|
case A_int_norm_aborted:
|
|
hostdata->dsp = (u32 *) hostdata->schedule;
|
|
hostdata->dsp_changed = 1;
|
|
if (cmd)
|
|
abnormal_finished (cmd, DID_ERROR << 16);
|
|
return SPECIFIC_INT_NOTHING;
|
|
case A_int_norm_emulateintfly:
|
|
NCR53c7x0_intfly(host);
|
|
return SPECIFIC_INT_NOTHING;
|
|
case A_int_test_1:
|
|
case A_int_test_2:
|
|
hostdata->idle = 1;
|
|
hostdata->test_completed = (dsps - A_int_test_1) / 0x00010000 + 1;
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk("scsi%d : test%d complete\n", host->host_no,
|
|
hostdata->test_completed);
|
|
return SPECIFIC_INT_NOTHING;
|
|
#ifdef A_int_debug_reselected_ok
|
|
case A_int_debug_reselected_ok:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
|
|
OPTION_DEBUG_DISCONNECT)) {
|
|
/*
|
|
* Note - this dsa is not based on location relative to
|
|
* the command structure, but to location relative to the
|
|
* DSA register
|
|
*/
|
|
u32 *dsa;
|
|
dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG));
|
|
|
|
printk("scsi%d : reselected_ok (DSA = 0x%x (virt 0x%p)\n",
|
|
host->host_no, NCR53c7x0_read32(DSA_REG), dsa);
|
|
printk("scsi%d : resume address is 0x%x (virt 0x%p)\n",
|
|
host->host_no, cmd->saved_data_pointer,
|
|
bus_to_virt(cmd->saved_data_pointer));
|
|
print_insn (host, hostdata->script + Ent_reselected_ok /
|
|
sizeof(u32), "", 1);
|
|
if ((hostdata->chip / 100) == 8)
|
|
printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n",
|
|
host->host_no, NCR53c7x0_read8(SXFER_REG),
|
|
NCR53c7x0_read8(SCNTL3_REG_800));
|
|
else
|
|
printk ("scsi%d : sxfer=0x%x, cannot read SBCL\n",
|
|
host->host_no, NCR53c7x0_read8(SXFER_REG));
|
|
if (c) {
|
|
print_insn (host, (u32 *)
|
|
hostdata->sync[c->device->id].script, "", 1);
|
|
print_insn (host, (u32 *)
|
|
hostdata->sync[c->device->id].script + 2, "", 1);
|
|
}
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_reselect_check
|
|
case A_int_debug_reselect_check:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
|
|
u32 *dsa;
|
|
#if 0
|
|
u32 *code;
|
|
#endif
|
|
/*
|
|
* Note - this dsa is not based on location relative to
|
|
* the command structure, but to location relative to the
|
|
* DSA register
|
|
*/
|
|
dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG));
|
|
printk("scsi%d : reselected_check_next (DSA = 0x%lx (virt 0x%p))\n",
|
|
host->host_no, virt_to_bus(dsa), dsa);
|
|
if (dsa) {
|
|
printk("scsi%d : resume address is 0x%x (virt 0x%p)\n",
|
|
host->host_no, cmd->saved_data_pointer,
|
|
bus_to_virt (cmd->saved_data_pointer));
|
|
#if 0
|
|
printk("scsi%d : template code :\n", host->host_no);
|
|
for (code = dsa + (Ent_dsa_code_check_reselect - Ent_dsa_zero)
|
|
/ sizeof(u32); code < (dsa + Ent_dsa_zero / sizeof(u32));
|
|
code += print_insn (host, code, "", 1));
|
|
#endif
|
|
}
|
|
print_insn (host, hostdata->script + Ent_reselected_ok /
|
|
sizeof(u32), "", 1);
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_dsa_schedule
|
|
case A_int_debug_dsa_schedule:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
|
|
u32 *dsa;
|
|
/*
|
|
* Note - this dsa is not based on location relative to
|
|
* the command structure, but to location relative to the
|
|
* DSA register
|
|
*/
|
|
dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG));
|
|
printk("scsi%d : dsa_schedule (old DSA = 0x%lx (virt 0x%p))\n",
|
|
host->host_no, virt_to_bus(dsa), dsa);
|
|
if (dsa)
|
|
printk("scsi%d : resume address is 0x%x (virt 0x%p)\n"
|
|
" (temp was 0x%x (virt 0x%p))\n",
|
|
host->host_no, cmd->saved_data_pointer,
|
|
bus_to_virt (cmd->saved_data_pointer),
|
|
NCR53c7x0_read32 (TEMP_REG),
|
|
bus_to_virt (NCR53c7x0_read32(TEMP_REG)));
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_scheduled
|
|
case A_int_debug_scheduled:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
|
|
printk("scsi%d : new I/O 0x%x (virt 0x%p) scheduled\n",
|
|
host->host_no, NCR53c7x0_read32(DSA_REG),
|
|
bus_to_virt(NCR53c7x0_read32(DSA_REG)));
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_idle
|
|
case A_int_debug_idle:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
|
|
printk("scsi%d : idle\n", host->host_no);
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_cmd
|
|
case A_int_debug_cmd:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
|
|
printk("scsi%d : command sent\n");
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_dsa_loaded
|
|
case A_int_debug_dsa_loaded:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
|
|
printk("scsi%d : DSA loaded with 0x%x (virt 0x%p)\n", host->host_no,
|
|
NCR53c7x0_read32(DSA_REG),
|
|
bus_to_virt(NCR53c7x0_read32(DSA_REG)));
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_reselected
|
|
case A_int_debug_reselected:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
|
|
OPTION_DEBUG_DISCONNECT)) {
|
|
if ((hostdata->chip / 100) == 8)
|
|
printk("scsi%d : reselected by target %d lun %d\n",
|
|
host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & ~0x80,
|
|
(int) hostdata->reselected_identify & 7);
|
|
else
|
|
printk("scsi%d : reselected by LCRC=0x%02x lun %d\n",
|
|
host->host_no, (int) NCR53c7x0_read8(LCRC_REG_10),
|
|
(int) hostdata->reselected_identify & 7);
|
|
print_queues(host);
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_disconnect_msg
|
|
case A_int_debug_disconnect_msg:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
|
|
if (c)
|
|
printk("scsi%d : target %d lun %d disconnecting\n",
|
|
host->host_no, c->device->id, c->device->lun);
|
|
else
|
|
printk("scsi%d : unknown target disconnecting\n",
|
|
host->host_no);
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_disconnected
|
|
case A_int_debug_disconnected:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
|
|
OPTION_DEBUG_DISCONNECT)) {
|
|
printk ("scsi%d : disconnected, new queues are\n",
|
|
host->host_no);
|
|
print_queues(host);
|
|
#if 0
|
|
/* Not valid on ncr53c710! */
|
|
printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n",
|
|
host->host_no, NCR53c7x0_read8(SXFER_REG),
|
|
NCR53c7x0_read8(SCNTL3_REG_800));
|
|
#endif
|
|
if (c) {
|
|
print_insn (host, (u32 *)
|
|
hostdata->sync[c->device->id].script, "", 1);
|
|
print_insn (host, (u32 *)
|
|
hostdata->sync[c->device->id].script + 2, "", 1);
|
|
}
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_panic
|
|
case A_int_debug_panic:
|
|
printk("scsi%d : int_debug_panic received\n", host->host_no);
|
|
print_lots (host);
|
|
return SPECIFIC_INT_PANIC;
|
|
#endif
|
|
#ifdef A_int_debug_saved
|
|
case A_int_debug_saved:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
|
|
OPTION_DEBUG_DISCONNECT)) {
|
|
printk ("scsi%d : saved data pointer 0x%x (virt 0x%p)\n",
|
|
host->host_no, cmd->saved_data_pointer,
|
|
bus_to_virt (cmd->saved_data_pointer));
|
|
print_progress (c);
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_restored
|
|
case A_int_debug_restored:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
|
|
OPTION_DEBUG_DISCONNECT)) {
|
|
if (cmd) {
|
|
int size;
|
|
printk ("scsi%d : restored data pointer 0x%x (virt 0x%p)\n",
|
|
host->host_no, cmd->saved_data_pointer, bus_to_virt (
|
|
cmd->saved_data_pointer));
|
|
size = print_insn (host, (u32 *)
|
|
bus_to_virt(cmd->saved_data_pointer), "", 1);
|
|
size = print_insn (host, (u32 *)
|
|
bus_to_virt(cmd->saved_data_pointer) + size, "", 1);
|
|
print_progress (c);
|
|
}
|
|
#if 0
|
|
printk ("scsi%d : datapath residual %d\n",
|
|
host->host_no, datapath_residual (host)) ;
|
|
#endif
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_sync
|
|
case A_int_debug_sync:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
|
|
OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) {
|
|
unsigned char sxfer = NCR53c7x0_read8 (SXFER_REG), scntl3;
|
|
if ((hostdata->chip / 100) == 8) {
|
|
scntl3 = NCR53c7x0_read8 (SCNTL3_REG_800);
|
|
if (c) {
|
|
if (sxfer != hostdata->sync[c->device->id].sxfer_sanity ||
|
|
scntl3 != hostdata->sync[c->device->id].scntl3_sanity) {
|
|
printk ("scsi%d : sync sanity check failed sxfer=0x%x, scntl3=0x%x",
|
|
host->host_no, sxfer, scntl3);
|
|
NCR53c7x0_write8 (SXFER_REG, sxfer);
|
|
NCR53c7x0_write8 (SCNTL3_REG_800, scntl3);
|
|
}
|
|
} else
|
|
printk ("scsi%d : unknown command sxfer=0x%x, scntl3=0x%x\n",
|
|
host->host_no, (int) sxfer, (int) scntl3);
|
|
} else {
|
|
if (c) {
|
|
if (sxfer != hostdata->sync[c->device->id].sxfer_sanity) {
|
|
printk ("scsi%d : sync sanity check failed sxfer=0x%x",
|
|
host->host_no, sxfer);
|
|
NCR53c7x0_write8 (SXFER_REG, sxfer);
|
|
NCR53c7x0_write8 (SBCL_REG,
|
|
hostdata->sync[c->device->id].sscf_710);
|
|
}
|
|
} else
|
|
printk ("scsi%d : unknown command sxfer=0x%x\n",
|
|
host->host_no, (int) sxfer);
|
|
}
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_datain
|
|
case A_int_debug_datain:
|
|
if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
|
|
OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) {
|
|
int size;
|
|
if ((hostdata->chip / 100) == 8)
|
|
printk ("scsi%d : In do_datain (%s) sxfer=0x%x, scntl3=0x%x\n"
|
|
" datapath residual=%d\n",
|
|
host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)),
|
|
(int) NCR53c7x0_read8(SXFER_REG),
|
|
(int) NCR53c7x0_read8(SCNTL3_REG_800),
|
|
datapath_residual (host)) ;
|
|
else
|
|
printk ("scsi%d : In do_datain (%s) sxfer=0x%x\n"
|
|
" datapath residual=%d\n",
|
|
host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)),
|
|
(int) NCR53c7x0_read8(SXFER_REG),
|
|
datapath_residual (host)) ;
|
|
print_insn (host, dsp, "", 1);
|
|
size = print_insn (host, (u32 *) bus_to_virt(dsp[1]), "", 1);
|
|
print_insn (host, (u32 *) bus_to_virt(dsp[1]) + size, "", 1);
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
#ifdef A_int_debug_check_dsa
|
|
case A_int_debug_check_dsa:
|
|
if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) {
|
|
int sdid;
|
|
int tmp;
|
|
char *where;
|
|
if (hostdata->chip / 100 == 8)
|
|
sdid = NCR53c7x0_read8 (SDID_REG_800) & 15;
|
|
else {
|
|
tmp = NCR53c7x0_read8 (SDID_REG_700);
|
|
if (!tmp)
|
|
panic ("SDID_REG_700 = 0");
|
|
tmp >>= 1;
|
|
sdid = 0;
|
|
while (tmp) {
|
|
tmp >>= 1;
|
|
sdid++;
|
|
}
|
|
}
|
|
where = dsp - NCR53c7x0_insn_size(NCR53c7x0_read8
|
|
(DCMD_REG)) == hostdata->script +
|
|
Ent_select_check_dsa / sizeof(u32) ?
|
|
"selection" : "reselection";
|
|
if (c && sdid != c->device->id) {
|
|
printk ("scsi%d : SDID target %d != DSA target %d at %s\n",
|
|
host->host_no, sdid, c->device->id, where);
|
|
print_lots(host);
|
|
dump_events (host, 20);
|
|
return SPECIFIC_INT_PANIC;
|
|
}
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
#endif
|
|
default:
|
|
if ((dsps & 0xff000000) == 0x03000000) {
|
|
printk ("scsi%d : misc debug interrupt 0x%x\n",
|
|
host->host_no, dsps);
|
|
return SPECIFIC_INT_RESTART;
|
|
} else if ((dsps & 0xff000000) == 0x05000000) {
|
|
if (hostdata->events) {
|
|
struct NCR53c7x0_event *event;
|
|
++hostdata->event_index;
|
|
if (hostdata->event_index >= hostdata->event_size)
|
|
hostdata->event_index = 0;
|
|
event = (struct NCR53c7x0_event *) hostdata->events +
|
|
hostdata->event_index;
|
|
event->event = (enum ncr_event) dsps;
|
|
event->dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
|
|
if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) {
|
|
if (hostdata->chip / 100 == 8)
|
|
event->target = NCR53c7x0_read8(SSID_REG_800);
|
|
else {
|
|
unsigned char tmp, sdid;
|
|
tmp = NCR53c7x0_read8 (SDID_REG_700);
|
|
if (!tmp)
|
|
panic ("SDID_REG_700 = 0");
|
|
tmp >>= 1;
|
|
sdid = 0;
|
|
while (tmp) {
|
|
tmp >>= 1;
|
|
sdid++;
|
|
}
|
|
event->target = sdid;
|
|
}
|
|
}
|
|
else
|
|
event->target = 255;
|
|
|
|
if (event->event == EVENT_RESELECT)
|
|
event->lun = hostdata->reselected_identify & 0xf;
|
|
else if (c)
|
|
event->lun = c->device->lun;
|
|
else
|
|
event->lun = 255;
|
|
do_gettimeofday(&(event->time));
|
|
if (c) {
|
|
event->pid = c->pid;
|
|
memcpy ((void *) event->cmnd, (void *) c->cmnd,
|
|
sizeof (event->cmnd));
|
|
} else {
|
|
event->pid = -1;
|
|
}
|
|
}
|
|
return SPECIFIC_INT_RESTART;
|
|
}
|
|
|
|
printk ("scsi%d : unknown user interrupt 0x%x\n",
|
|
host->host_no, (unsigned) dsps);
|
|
return SPECIFIC_INT_PANIC;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* XXX - the stock NCR assembler won't output the scriptu.h file,
|
|
* which undefine's all #define'd CPP symbols from the script.h
|
|
* file, which will create problems if you use multiple scripts
|
|
* with the same symbol names.
|
|
*
|
|
* If you insist on using NCR's assembler, you could generate
|
|
* scriptu.h from script.h using something like
|
|
*
|
|
* grep #define script.h | \
|
|
* sed 's/#define[ ][ ]*\([_a-zA-Z][_a-zA-Z0-9]*\).*$/#undefine \1/' \
|
|
* > scriptu.h
|
|
*/
|
|
|
|
#include "53c7xx_u.h"
|
|
|
|
/* XXX - add alternate script handling code here */
|
|
|
|
|
|
/*
|
|
* Function : static void NCR537xx_soft_reset (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : perform a soft reset of the NCR53c7xx chip
|
|
*
|
|
* Inputs : host - pointer to this host adapter's structure
|
|
*
|
|
* Preconditions : NCR53c7x0_init must have been called for this
|
|
* host.
|
|
*
|
|
*/
|
|
|
|
static void
|
|
NCR53c7x0_soft_reset (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
unsigned long flags;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
local_irq_save(flags);
|
|
|
|
/* Disable scsi chip and s/w level 7 ints */
|
|
|
|
#ifdef CONFIG_MVME16x
|
|
if (MACH_IS_MVME16x)
|
|
{
|
|
volatile unsigned long v;
|
|
|
|
v = *(volatile unsigned long *)0xfff4006c;
|
|
v &= ~0x8000;
|
|
*(volatile unsigned long *)0xfff4006c = v;
|
|
v = *(volatile unsigned long *)0xfff4202c;
|
|
v &= ~0x10;
|
|
*(volatile unsigned long *)0xfff4202c = v;
|
|
}
|
|
#endif
|
|
/* Anything specific for your hardware? */
|
|
|
|
/*
|
|
* Do a soft reset of the chip so that everything is
|
|
* reinitialized to the power-on state.
|
|
*
|
|
* Basically follow the procedure outlined in the NCR53c700
|
|
* data manual under Chapter Six, How to Use, Steps Necessary to
|
|
* Start SCRIPTS, with the exception of actually starting the
|
|
* script and setting up the synchronous transfer gunk.
|
|
*/
|
|
|
|
/* Should we reset the scsi bus here??????????????????? */
|
|
|
|
NCR53c7x0_write8(ISTAT_REG_700, ISTAT_10_SRST);
|
|
NCR53c7x0_write8(ISTAT_REG_700, 0);
|
|
|
|
/*
|
|
* saved_dcntl is set up in NCR53c7x0_init() before it is overwritten
|
|
* here. We should have some better way of working out the CF bit
|
|
* setting..
|
|
*/
|
|
|
|
hostdata->saved_dcntl = DCNTL_10_EA|DCNTL_10_COM;
|
|
if (hostdata->scsi_clock > 50000000)
|
|
hostdata->saved_dcntl |= DCNTL_700_CF_3;
|
|
else
|
|
if (hostdata->scsi_clock > 37500000)
|
|
hostdata->saved_dcntl |= DCNTL_700_CF_2;
|
|
#if 0
|
|
else
|
|
/* Any clocks less than 37.5MHz? */
|
|
#endif
|
|
|
|
if (hostdata->options & OPTION_DEBUG_TRACE)
|
|
NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM);
|
|
else
|
|
NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl);
|
|
/* Following disables snooping - snooping is not required, as non-
|
|
* cached pages are used for shared data, and appropriate use is
|
|
* made of cache_push/cache_clear. Indeed, for 68060
|
|
* enabling snooping causes disk corruption of ext2fs free block
|
|
* bitmaps and the like. If you have a 68060 with snooping hardwared
|
|
* on, then you need to enable CONFIG_060_WRITETHROUGH.
|
|
*/
|
|
NCR53c7x0_write8(CTEST7_REG, CTEST7_10_TT1|CTEST7_STD);
|
|
/* Actually burst of eight, according to my 53c710 databook */
|
|
NCR53c7x0_write8(hostdata->dmode, DMODE_10_BL_8 | DMODE_10_FC2);
|
|
NCR53c7x0_write8(SCID_REG, 1 << host->this_id);
|
|
NCR53c7x0_write8(SBCL_REG, 0);
|
|
NCR53c7x0_write8(SCNTL1_REG, SCNTL1_ESR_700);
|
|
NCR53c7x0_write8(SCNTL0_REG, ((hostdata->options & OPTION_PARITY) ?
|
|
SCNTL0_EPC : 0) | SCNTL0_EPG_700 | SCNTL0_ARB1 | SCNTL0_ARB2);
|
|
|
|
/*
|
|
* Enable all interrupts, except parity which we only want when
|
|
* the user requests it.
|
|
*/
|
|
|
|
NCR53c7x0_write8(DIEN_REG, DIEN_700_BF |
|
|
DIEN_ABRT | DIEN_SSI | DIEN_SIR | DIEN_700_OPC);
|
|
|
|
NCR53c7x0_write8(SIEN_REG_700, ((hostdata->options & OPTION_PARITY) ?
|
|
SIEN_PAR : 0) | SIEN_700_STO | SIEN_RST | SIEN_UDC |
|
|
SIEN_SGE | SIEN_MA);
|
|
|
|
#ifdef CONFIG_MVME16x
|
|
if (MACH_IS_MVME16x)
|
|
{
|
|
volatile unsigned long v;
|
|
|
|
/* Enable scsi chip and s/w level 7 ints */
|
|
v = *(volatile unsigned long *)0xfff40080;
|
|
v = (v & ~(0xf << 28)) | (4 << 28);
|
|
*(volatile unsigned long *)0xfff40080 = v;
|
|
v = *(volatile unsigned long *)0xfff4006c;
|
|
v |= 0x8000;
|
|
*(volatile unsigned long *)0xfff4006c = v;
|
|
v = *(volatile unsigned long *)0xfff4202c;
|
|
v = (v & ~0xff) | 0x10 | 4;
|
|
*(volatile unsigned long *)0xfff4202c = v;
|
|
}
|
|
#endif
|
|
/* Anything needed for your hardware? */
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function static struct NCR53c7x0_cmd *allocate_cmd (Scsi_Cmnd *cmd)
|
|
*
|
|
* Purpose : Return the first free NCR53c7x0_cmd structure (which are
|
|
* reused in a LIFO manner to minimize cache thrashing).
|
|
*
|
|
* Side effects : If we haven't yet scheduled allocation of NCR53c7x0_cmd
|
|
* structures for this device, do so. Attempt to complete all scheduled
|
|
* allocations using get_zeroed_page(), putting NCR53c7x0_cmd structures on
|
|
* the free list. Teach programmers not to drink and hack.
|
|
*
|
|
* Inputs : cmd - SCSI command
|
|
*
|
|
* Returns : NCR53c7x0_cmd structure allocated on behalf of cmd;
|
|
* NULL on failure.
|
|
*/
|
|
|
|
static void
|
|
my_free_page (void *addr, int dummy)
|
|
{
|
|
/* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which
|
|
* XXX may be invalid (CONFIG_060_WRITETHROUGH)
|
|
*/
|
|
kernel_set_cachemode((void *)addr, 4096, IOMAP_FULL_CACHING);
|
|
free_page ((u32)addr);
|
|
}
|
|
|
|
static struct NCR53c7x0_cmd *
|
|
allocate_cmd (Scsi_Cmnd *cmd) {
|
|
struct Scsi_Host *host = cmd->device->host;
|
|
struct NCR53c7x0_hostdata *hostdata =
|
|
(struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
u32 real; /* Real address */
|
|
int size; /* Size of *tmp */
|
|
struct NCR53c7x0_cmd *tmp;
|
|
unsigned long flags;
|
|
|
|
if (hostdata->options & OPTION_DEBUG_ALLOCATION)
|
|
printk ("scsi%d : num_cmds = %d, can_queue = %d\n"
|
|
" target = %d, lun = %d, %s\n",
|
|
host->host_no, hostdata->num_cmds, host->can_queue,
|
|
cmd->device->id, cmd->device->lun, (hostdata->cmd_allocated[cmd->device->id] &
|
|
(1 << cmd->device->lun)) ? "already allocated" : "not allocated");
|
|
|
|
/*
|
|
* If we have not yet reserved commands for this I_T_L nexus, and
|
|
* the device exists (as indicated by permanent Scsi_Cmnd structures
|
|
* being allocated under 1.3.x, or being outside of scan_scsis in
|
|
* 1.2.x), do so now.
|
|
*/
|
|
if (!(hostdata->cmd_allocated[cmd->device->id] & (1 << cmd->device->lun)) &&
|
|
cmd->device && cmd->device->has_cmdblocks) {
|
|
if ((hostdata->extra_allocate + hostdata->num_cmds) < host->can_queue)
|
|
hostdata->extra_allocate += host->cmd_per_lun;
|
|
hostdata->cmd_allocated[cmd->device->id] |= (1 << cmd->device->lun);
|
|
}
|
|
|
|
for (; hostdata->extra_allocate > 0 ; --hostdata->extra_allocate,
|
|
++hostdata->num_cmds) {
|
|
/* historically, kmalloc has returned unaligned addresses; pad so we
|
|
have enough room to ROUNDUP */
|
|
size = hostdata->max_cmd_size + sizeof (void *);
|
|
#ifdef FORCE_DSA_ALIGNMENT
|
|
/*
|
|
* 53c710 rev.0 doesn't have an add-with-carry instruction.
|
|
* Ensure we allocate enough memory to force alignment.
|
|
*/
|
|
size += 256;
|
|
#endif
|
|
/* FIXME: for ISA bus '7xx chips, we need to or GFP_DMA in here */
|
|
|
|
if (size > 4096) {
|
|
printk (KERN_ERR "53c7xx: allocate_cmd size > 4K\n");
|
|
return NULL;
|
|
}
|
|
real = get_zeroed_page(GFP_ATOMIC);
|
|
if (real == 0)
|
|
return NULL;
|
|
memset((void *)real, 0, 4096);
|
|
cache_push(virt_to_phys((void *)real), 4096);
|
|
cache_clear(virt_to_phys((void *)real), 4096);
|
|
kernel_set_cachemode((void *)real, 4096, IOMAP_NOCACHE_SER);
|
|
tmp = ROUNDUP(real, void *);
|
|
#ifdef FORCE_DSA_ALIGNMENT
|
|
{
|
|
if (((u32)tmp & 0xff) > CmdPageStart)
|
|
tmp = (struct NCR53c7x0_cmd *)((u32)tmp + 255);
|
|
tmp = (struct NCR53c7x0_cmd *)(((u32)tmp & ~0xff) + CmdPageStart);
|
|
#if 0
|
|
printk ("scsi: size = %d, real = 0x%08x, tmp set to 0x%08x\n",
|
|
size, real, (u32)tmp);
|
|
#endif
|
|
}
|
|
#endif
|
|
tmp->real = (void *)real;
|
|
tmp->size = size;
|
|
tmp->free = ((void (*)(void *, int)) my_free_page);
|
|
local_irq_save(flags);
|
|
tmp->next = hostdata->free;
|
|
hostdata->free = tmp;
|
|
local_irq_restore(flags);
|
|
}
|
|
local_irq_save(flags);
|
|
tmp = (struct NCR53c7x0_cmd *) hostdata->free;
|
|
if (tmp) {
|
|
hostdata->free = tmp->next;
|
|
}
|
|
local_irq_restore(flags);
|
|
if (!tmp)
|
|
printk ("scsi%d : can't allocate command for target %d lun %d\n",
|
|
host->host_no, cmd->device->id, cmd->device->lun);
|
|
return tmp;
|
|
}
|
|
|
|
/*
|
|
* Function static struct NCR53c7x0_cmd *create_cmd (Scsi_Cmnd *cmd)
|
|
*
|
|
*
|
|
* Purpose : allocate a NCR53c7x0_cmd structure, initialize it based on the
|
|
* Scsi_Cmnd structure passed in cmd, including dsa and Linux field
|
|
* initialization, and dsa code relocation.
|
|
*
|
|
* Inputs : cmd - SCSI command
|
|
*
|
|
* Returns : NCR53c7x0_cmd structure corresponding to cmd,
|
|
* NULL on failure.
|
|
*/
|
|
static struct NCR53c7x0_cmd *
|
|
create_cmd (Scsi_Cmnd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
struct Scsi_Host *host = cmd->device->host;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
struct NCR53c7x0_cmd *tmp; /* NCR53c7x0_cmd structure for this command */
|
|
int datain, /* Number of instructions per phase */
|
|
dataout;
|
|
int data_transfer_instructions, /* Count of dynamic instructions */
|
|
i; /* Counter */
|
|
u32 *cmd_datain, /* Address of datain/dataout code */
|
|
*cmd_dataout; /* Incremented as we assemble */
|
|
#ifdef notyet
|
|
unsigned char *msgptr; /* Current byte in select message */
|
|
int msglen; /* Length of whole select message */
|
|
#endif
|
|
unsigned long flags;
|
|
u32 exp_select_indirect; /* Used in sanity check */
|
|
NCR53c7x0_local_setup(cmd->device->host);
|
|
|
|
if (!(tmp = allocate_cmd (cmd)))
|
|
return NULL;
|
|
|
|
/*
|
|
* Copy CDB and initialised result fields from Scsi_Cmnd to NCR53c7x0_cmd.
|
|
* We do this because NCR53c7x0_cmd may have a special cache mode
|
|
* selected to cope with lack of bus snooping, etc.
|
|
*/
|
|
|
|
memcpy(tmp->cmnd, cmd->cmnd, 12);
|
|
tmp->result = cmd->result;
|
|
|
|
/*
|
|
* Decide whether we need to generate commands for DATA IN,
|
|
* DATA OUT, neither, or both based on the SCSI command
|
|
*/
|
|
|
|
switch (cmd->cmnd[0]) {
|
|
/* These commands do DATA IN */
|
|
case INQUIRY:
|
|
case MODE_SENSE:
|
|
case READ_6:
|
|
case READ_10:
|
|
case READ_CAPACITY:
|
|
case REQUEST_SENSE:
|
|
case READ_BLOCK_LIMITS:
|
|
case READ_TOC:
|
|
datain = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3;
|
|
dataout = 0;
|
|
break;
|
|
/* These commands do DATA OUT */
|
|
case MODE_SELECT:
|
|
case WRITE_6:
|
|
case WRITE_10:
|
|
#if 0
|
|
printk("scsi%d : command is ", host->host_no);
|
|
__scsi_print_command(cmd->cmnd);
|
|
#endif
|
|
#if 0
|
|
printk ("scsi%d : %d scatter/gather segments\n", host->host_no,
|
|
cmd->use_sg);
|
|
#endif
|
|
datain = 0;
|
|
dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3;
|
|
#if 0
|
|
hostdata->options |= OPTION_DEBUG_INTR;
|
|
#endif
|
|
break;
|
|
/*
|
|
* These commands do no data transfer, we should force an
|
|
* interrupt if a data phase is attempted on them.
|
|
*/
|
|
case TEST_UNIT_READY:
|
|
case ALLOW_MEDIUM_REMOVAL:
|
|
case START_STOP:
|
|
datain = dataout = 0;
|
|
break;
|
|
/*
|
|
* We don't know about these commands, so generate code to handle
|
|
* both DATA IN and DATA OUT phases. More efficient to identify them
|
|
* and add them to the above cases.
|
|
*/
|
|
default:
|
|
printk("scsi%d : datain+dataout for command ", host->host_no);
|
|
__scsi_print_command(cmd->cmnd);
|
|
datain = dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3;
|
|
}
|
|
|
|
/*
|
|
* New code : so that active pointers work correctly regardless
|
|
* of where the saved data pointer is at, we want to immediately
|
|
* enter the dynamic code after selection, and on a non-data
|
|
* phase perform a CALL to the non-data phase handler, with
|
|
* returns back to this address.
|
|
*
|
|
* If a phase mismatch is encountered in the middle of a
|
|
* Block MOVE instruction, we want to _leave_ that instruction
|
|
* unchanged as the current case is, modify a temporary buffer,
|
|
* and point the active pointer (TEMP) at that.
|
|
*
|
|
* Furthermore, we want to implement a saved data pointer,
|
|
* set by the SAVE_DATA_POINTERs message.
|
|
*
|
|
* So, the data transfer segments will change to
|
|
* CALL data_transfer, WHEN NOT data phase
|
|
* MOVE x, x, WHEN data phase
|
|
* ( repeat )
|
|
* JUMP other_transfer
|
|
*/
|
|
|
|
data_transfer_instructions = datain + dataout;
|
|
|
|
/*
|
|
* When we perform a request sense, we overwrite various things,
|
|
* including the data transfer code. Make sure we have enough
|
|
* space to do that.
|
|
*/
|
|
|
|
if (data_transfer_instructions < 2)
|
|
data_transfer_instructions = 2;
|
|
|
|
|
|
/*
|
|
* The saved data pointer is set up so that a RESTORE POINTERS message
|
|
* will start the data transfer over at the beginning.
|
|
*/
|
|
|
|
tmp->saved_data_pointer = virt_to_bus (hostdata->script) +
|
|
hostdata->E_data_transfer;
|
|
|
|
/*
|
|
* Initialize Linux specific fields.
|
|
*/
|
|
|
|
tmp->cmd = cmd;
|
|
tmp->next = NULL;
|
|
tmp->flags = 0;
|
|
tmp->dsa_next_addr = virt_to_bus(tmp->dsa) + hostdata->dsa_next -
|
|
hostdata->dsa_start;
|
|
tmp->dsa_addr = virt_to_bus(tmp->dsa) - hostdata->dsa_start;
|
|
|
|
/*
|
|
* Calculate addresses of dynamic code to fill in DSA
|
|
*/
|
|
|
|
tmp->data_transfer_start = tmp->dsa + (hostdata->dsa_end -
|
|
hostdata->dsa_start) / sizeof(u32);
|
|
tmp->data_transfer_end = tmp->data_transfer_start +
|
|
2 * data_transfer_instructions;
|
|
|
|
cmd_datain = datain ? tmp->data_transfer_start : NULL;
|
|
cmd_dataout = dataout ? (datain ? cmd_datain + 2 * datain : tmp->
|
|
data_transfer_start) : NULL;
|
|
|
|
/*
|
|
* Fill in the NCR53c7x0_cmd structure as follows
|
|
* dsa, with fixed up DSA code
|
|
* datain code
|
|
* dataout code
|
|
*/
|
|
|
|
/* Copy template code into dsa and perform all necessary fixups */
|
|
if (hostdata->dsa_fixup)
|
|
hostdata->dsa_fixup(tmp);
|
|
|
|
patch_dsa_32(tmp->dsa, dsa_next, 0, 0);
|
|
/*
|
|
* XXX is this giving 53c710 access to the Scsi_Cmnd in some way?
|
|
* Do we need to change it for caching reasons?
|
|
*/
|
|
patch_dsa_32(tmp->dsa, dsa_cmnd, 0, virt_to_bus(cmd));
|
|
|
|
if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS) {
|
|
|
|
exp_select_indirect = ((1 << cmd->device->id) << 16) |
|
|
(hostdata->sync[cmd->device->id].sxfer_sanity << 8);
|
|
|
|
if (hostdata->sync[cmd->device->id].select_indirect !=
|
|
exp_select_indirect) {
|
|
printk ("scsi%d : sanity check failed select_indirect=0x%x\n",
|
|
host->host_no, hostdata->sync[cmd->device->id].select_indirect);
|
|
FATAL(host);
|
|
|
|
}
|
|
}
|
|
|
|
patch_dsa_32(tmp->dsa, dsa_select, 0,
|
|
hostdata->sync[cmd->device->id].select_indirect);
|
|
|
|
/*
|
|
* Right now, we'll do the WIDE and SYNCHRONOUS negotiations on
|
|
* different commands; although it should be trivial to do them
|
|
* both at the same time.
|
|
*/
|
|
if (hostdata->initiate_wdtr & (1 << cmd->device->id)) {
|
|
memcpy ((void *) (tmp->select + 1), (void *) wdtr_message,
|
|
sizeof(wdtr_message));
|
|
patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(wdtr_message));
|
|
local_irq_save(flags);
|
|
hostdata->initiate_wdtr &= ~(1 << cmd->device->id);
|
|
local_irq_restore(flags);
|
|
} else if (hostdata->initiate_sdtr & (1 << cmd->device->id)) {
|
|
memcpy ((void *) (tmp->select + 1), (void *) sdtr_message,
|
|
sizeof(sdtr_message));
|
|
patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(sdtr_message));
|
|
tmp->flags |= CMD_FLAG_SDTR;
|
|
local_irq_save(flags);
|
|
hostdata->initiate_sdtr &= ~(1 << cmd->device->id);
|
|
local_irq_restore(flags);
|
|
|
|
}
|
|
#if 1
|
|
else if (!(hostdata->talked_to & (1 << cmd->device->id)) &&
|
|
!(hostdata->options & OPTION_NO_ASYNC)) {
|
|
|
|
memcpy ((void *) (tmp->select + 1), (void *) async_message,
|
|
sizeof(async_message));
|
|
patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(async_message));
|
|
tmp->flags |= CMD_FLAG_SDTR;
|
|
}
|
|
#endif
|
|
else
|
|
patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1);
|
|
|
|
hostdata->talked_to |= (1 << cmd->device->id);
|
|
tmp->select[0] = (hostdata->options & OPTION_DISCONNECT) ?
|
|
IDENTIFY (1, cmd->device->lun) : IDENTIFY (0, cmd->device->lun);
|
|
patch_dsa_32(tmp->dsa, dsa_msgout, 1, virt_to_bus(tmp->select));
|
|
patch_dsa_32(tmp->dsa, dsa_cmdout, 0, cmd->cmd_len);
|
|
patch_dsa_32(tmp->dsa, dsa_cmdout, 1, virt_to_bus(tmp->cmnd));
|
|
patch_dsa_32(tmp->dsa, dsa_dataout, 0, cmd_dataout ?
|
|
virt_to_bus (cmd_dataout)
|
|
: virt_to_bus (hostdata->script) + hostdata->E_other_transfer);
|
|
patch_dsa_32(tmp->dsa, dsa_datain, 0, cmd_datain ?
|
|
virt_to_bus (cmd_datain)
|
|
: virt_to_bus (hostdata->script) + hostdata->E_other_transfer);
|
|
/*
|
|
* XXX - need to make endian aware, should use separate variables
|
|
* for both status and message bytes.
|
|
*/
|
|
patch_dsa_32(tmp->dsa, dsa_msgin, 0, 1);
|
|
/*
|
|
* FIXME : these only works for little endian. We probably want to
|
|
* provide message and status fields in the NCR53c7x0_cmd
|
|
* structure, and assign them to cmd->result when we're done.
|
|
*/
|
|
#ifdef BIG_ENDIAN
|
|
patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 2);
|
|
patch_dsa_32(tmp->dsa, dsa_status, 0, 1);
|
|
patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result) + 3);
|
|
#else
|
|
patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 1);
|
|
patch_dsa_32(tmp->dsa, dsa_status, 0, 1);
|
|
patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result));
|
|
#endif
|
|
patch_dsa_32(tmp->dsa, dsa_msgout_other, 0, 1);
|
|
patch_dsa_32(tmp->dsa, dsa_msgout_other, 1,
|
|
virt_to_bus(&(hostdata->NCR53c7xx_msg_nop)));
|
|
|
|
/*
|
|
* Generate code for zero or more of the DATA IN, DATA OUT phases
|
|
* in the format
|
|
*
|
|
* CALL data_transfer, WHEN NOT phase
|
|
* MOVE first buffer length, first buffer address, WHEN phase
|
|
* ...
|
|
* MOVE last buffer length, last buffer address, WHEN phase
|
|
* JUMP other_transfer
|
|
*/
|
|
|
|
/*
|
|
* See if we're getting to data transfer by generating an unconditional
|
|
* interrupt.
|
|
*/
|
|
#if 0
|
|
if (datain) {
|
|
cmd_datain[0] = 0x98080000;
|
|
cmd_datain[1] = 0x03ffd00d;
|
|
cmd_datain += 2;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* XXX - I'm undecided whether all of this nonsense is faster
|
|
* in the long run, or whether I should just go and implement a loop
|
|
* on the NCR chip using table indirect mode?
|
|
*
|
|
* In any case, this is how it _must_ be done for 53c700/700-66 chips,
|
|
* so this stays even when we come up with something better.
|
|
*
|
|
* When we're limited to 1 simultaneous command, no overlapping processing,
|
|
* we're seeing 630K/sec, with 7% CPU usage on a slow Syquest 45M
|
|
* drive.
|
|
*
|
|
* Not bad, not good. We'll see.
|
|
*/
|
|
|
|
tmp->bounce.len = 0; /* Assume aligned buffer */
|
|
|
|
for (i = 0; cmd->use_sg ? (i < cmd->use_sg) : !i; cmd_datain += 4,
|
|
cmd_dataout += 4, ++i) {
|
|
u32 vbuf = cmd->use_sg
|
|
? (u32)page_address(((struct scatterlist *)cmd->buffer)[i].page)+
|
|
((struct scatterlist *)cmd->buffer)[i].offset
|
|
: (u32)(cmd->request_buffer);
|
|
u32 bbuf = virt_to_bus((void *)vbuf);
|
|
u32 count = cmd->use_sg ?
|
|
((struct scatterlist *)cmd->buffer)[i].length :
|
|
cmd->request_bufflen;
|
|
|
|
/*
|
|
* If we have buffers which are not aligned with 16 byte cache
|
|
* lines, then we just hope nothing accesses the other parts of
|
|
* those cache lines while the transfer is in progress. That would
|
|
* fill the cache, and subsequent reads of the dma data would pick
|
|
* up the wrong thing.
|
|
* XXX We need a bounce buffer to handle that correctly.
|
|
*/
|
|
|
|
if (((bbuf & 15) || (count & 15)) && (datain || dataout))
|
|
{
|
|
/* Bounce buffer needed */
|
|
if (cmd->use_sg)
|
|
printk ("53c7xx: Non-aligned buffer with use_sg\n");
|
|
else if (datain && dataout)
|
|
printk ("53c7xx: Non-aligned buffer with datain && dataout\n");
|
|
else if (count > 256)
|
|
printk ("53c7xx: Non-aligned transfer > 256 bytes\n");
|
|
else
|
|
{
|
|
if (datain)
|
|
{
|
|
tmp->bounce.len = count;
|
|
tmp->bounce.addr = vbuf;
|
|
bbuf = virt_to_bus(tmp->bounce.buf);
|
|
tmp->bounce.buf[0] = 0xff;
|
|
tmp->bounce.buf[1] = 0xfe;
|
|
tmp->bounce.buf[2] = 0xfd;
|
|
tmp->bounce.buf[3] = 0xfc;
|
|
}
|
|
if (dataout)
|
|
{
|
|
memcpy ((void *)tmp->bounce.buf, (void *)vbuf, count);
|
|
bbuf = virt_to_bus(tmp->bounce.buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (datain) {
|
|
cache_clear(virt_to_phys((void *)vbuf), count);
|
|
/* CALL other_in, WHEN NOT DATA_IN */
|
|
cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL |
|
|
DCMD_TCI_IO) << 24) |
|
|
DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE;
|
|
cmd_datain[1] = virt_to_bus (hostdata->script) +
|
|
hostdata->E_other_in;
|
|
/* MOVE count, buf, WHEN DATA_IN */
|
|
cmd_datain[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | DCMD_BMI_IO)
|
|
<< 24) | count;
|
|
cmd_datain[3] = bbuf;
|
|
#if 0
|
|
print_insn (host, cmd_datain, "dynamic ", 1);
|
|
print_insn (host, cmd_datain + 2, "dynamic ", 1);
|
|
#endif
|
|
}
|
|
if (dataout) {
|
|
cache_push(virt_to_phys((void *)vbuf), count);
|
|
/* CALL other_out, WHEN NOT DATA_OUT */
|
|
cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL) << 24) |
|
|
DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE;
|
|
cmd_dataout[1] = virt_to_bus(hostdata->script) +
|
|
hostdata->E_other_out;
|
|
/* MOVE count, buf, WHEN DATA+OUT */
|
|
cmd_dataout[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I) << 24)
|
|
| count;
|
|
cmd_dataout[3] = bbuf;
|
|
#if 0
|
|
print_insn (host, cmd_dataout, "dynamic ", 1);
|
|
print_insn (host, cmd_dataout + 2, "dynamic ", 1);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Install JUMP instructions after the data transfer routines to return
|
|
* control to the do_other_transfer routines.
|
|
*/
|
|
|
|
|
|
if (datain) {
|
|
cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) |
|
|
DBC_TCI_TRUE;
|
|
cmd_datain[1] = virt_to_bus(hostdata->script) +
|
|
hostdata->E_other_transfer;
|
|
#if 0
|
|
print_insn (host, cmd_datain, "dynamic jump ", 1);
|
|
#endif
|
|
cmd_datain += 2;
|
|
}
|
|
#if 0
|
|
if (datain) {
|
|
cmd_datain[0] = 0x98080000;
|
|
cmd_datain[1] = 0x03ffdeed;
|
|
cmd_datain += 2;
|
|
}
|
|
#endif
|
|
if (dataout) {
|
|
cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) |
|
|
DBC_TCI_TRUE;
|
|
cmd_dataout[1] = virt_to_bus(hostdata->script) +
|
|
hostdata->E_other_transfer;
|
|
#if 0
|
|
print_insn (host, cmd_dataout, "dynamic jump ", 1);
|
|
#endif
|
|
cmd_dataout += 2;
|
|
}
|
|
|
|
return tmp;
|
|
}
|
|
|
|
/*
|
|
* Function : int NCR53c7xx_queue_command (Scsi_Cmnd *cmd,
|
|
* void (*done)(Scsi_Cmnd *))
|
|
*
|
|
* Purpose : enqueues a SCSI command
|
|
*
|
|
* Inputs : cmd - SCSI command, done - function called on completion, with
|
|
* a pointer to the command descriptor.
|
|
*
|
|
* Returns : 0
|
|
*
|
|
* Side effects :
|
|
* cmd is added to the per instance driver issue_queue, with major
|
|
* twiddling done to the host specific fields of cmd. If the
|
|
* process_issue_queue coroutine isn't running, it is restarted.
|
|
*
|
|
* NOTE : we use the host_scribble field of the Scsi_Cmnd structure to
|
|
* hold our own data, and pervert the ptr field of the SCp field
|
|
* to create a linked list.
|
|
*/
|
|
|
|
int
|
|
NCR53c7xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *)) {
|
|
struct Scsi_Host *host = cmd->device->host;
|
|
struct NCR53c7x0_hostdata *hostdata =
|
|
(struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
unsigned long flags;
|
|
Scsi_Cmnd *tmp;
|
|
|
|
cmd->scsi_done = done;
|
|
cmd->host_scribble = NULL;
|
|
cmd->SCp.ptr = NULL;
|
|
cmd->SCp.buffer = NULL;
|
|
|
|
#ifdef VALID_IDS
|
|
/* Ignore commands on invalid IDs */
|
|
if (!hostdata->valid_ids[cmd->device->id]) {
|
|
printk("scsi%d : ignoring target %d lun %d\n", host->host_no,
|
|
cmd->device->id, cmd->device->lun);
|
|
cmd->result = (DID_BAD_TARGET << 16);
|
|
done(cmd);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
local_irq_save(flags);
|
|
if ((hostdata->options & (OPTION_DEBUG_INIT_ONLY|OPTION_DEBUG_PROBE_ONLY))
|
|
|| ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) &&
|
|
!(hostdata->debug_lun_limit[cmd->device->id] & (1 << cmd->device->lun)))
|
|
#ifdef LINUX_1_2
|
|
|| cmd->device->id > 7
|
|
#else
|
|
|| cmd->device->id > host->max_id
|
|
#endif
|
|
|| cmd->device->id == host->this_id
|
|
|| hostdata->state == STATE_DISABLED) {
|
|
printk("scsi%d : disabled or bad target %d lun %d\n", host->host_no,
|
|
cmd->device->id, cmd->device->lun);
|
|
cmd->result = (DID_BAD_TARGET << 16);
|
|
done(cmd);
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
if ((hostdata->options & OPTION_DEBUG_NCOMMANDS_LIMIT) &&
|
|
(hostdata->debug_count_limit == 0)) {
|
|
printk("scsi%d : maximum commands exceeded\n", host->host_no);
|
|
cmd->result = (DID_BAD_TARGET << 16);
|
|
done(cmd);
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
if (hostdata->options & OPTION_DEBUG_READ_ONLY) {
|
|
switch (cmd->cmnd[0]) {
|
|
case WRITE_6:
|
|
case WRITE_10:
|
|
printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n",
|
|
host->host_no);
|
|
cmd->result = (DID_BAD_TARGET << 16);
|
|
done(cmd);
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) &&
|
|
hostdata->debug_count_limit != -1)
|
|
--hostdata->debug_count_limit;
|
|
|
|
cmd->result = 0xffff; /* The NCR will overwrite message
|
|
and status with valid data */
|
|
cmd->host_scribble = (unsigned char *) tmp = create_cmd (cmd);
|
|
|
|
/*
|
|
* REQUEST SENSE commands are inserted at the head of the queue
|
|
* so that we do not clear the contingent allegiance condition
|
|
* they may be looking at.
|
|
*/
|
|
|
|
if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
|
|
cmd->SCp.ptr = (unsigned char *) hostdata->issue_queue;
|
|
hostdata->issue_queue = cmd;
|
|
} else {
|
|
for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp->SCp.ptr;
|
|
tmp = (Scsi_Cmnd *) tmp->SCp.ptr);
|
|
tmp->SCp.ptr = (unsigned char *) cmd;
|
|
}
|
|
local_irq_restore(flags);
|
|
run_process_issue_queue();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function : void to_schedule_list (struct Scsi_Host *host,
|
|
* struct NCR53c7x0_hostdata * hostdata, Scsi_Cmnd *cmd)
|
|
*
|
|
* Purpose : takes a SCSI command which was just removed from the
|
|
* issue queue, and deals with it by inserting it in the first
|
|
* free slot in the schedule list or by terminating it immediately.
|
|
*
|
|
* Inputs :
|
|
* host - SCSI host adapter; hostdata - hostdata structure for
|
|
* this adapter; cmd - a pointer to the command; should have
|
|
* the host_scribble field initialized to point to a valid
|
|
*
|
|
* Side effects :
|
|
* cmd is added to the per instance schedule list, with minor
|
|
* twiddling done to the host specific fields of cmd.
|
|
*
|
|
*/
|
|
|
|
static __inline__ void
|
|
to_schedule_list (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata,
|
|
struct NCR53c7x0_cmd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
Scsi_Cmnd *tmp = cmd->cmd;
|
|
unsigned long flags;
|
|
/* dsa start is negative, so subtraction is used */
|
|
volatile u32 *ncrcurrent;
|
|
|
|
int i;
|
|
NCR53c7x0_local_setup(host);
|
|
#if 0
|
|
printk("scsi%d : new dsa is 0x%lx (virt 0x%p)\n", host->host_no,
|
|
virt_to_bus(hostdata->dsa), hostdata->dsa);
|
|
#endif
|
|
|
|
local_irq_save(flags);
|
|
|
|
/*
|
|
* Work around race condition : if an interrupt fired and we
|
|
* got disabled forget about this command.
|
|
*/
|
|
|
|
if (hostdata->state == STATE_DISABLED) {
|
|
printk("scsi%d : driver disabled\n", host->host_no);
|
|
tmp->result = (DID_BAD_TARGET << 16);
|
|
cmd->next = (struct NCR53c7x0_cmd *) hostdata->free;
|
|
hostdata->free = cmd;
|
|
tmp->scsi_done(tmp);
|
|
local_irq_restore(flags);
|
|
return;
|
|
}
|
|
|
|
for (i = host->can_queue, ncrcurrent = hostdata->schedule;
|
|
i > 0 && ncrcurrent[0] != hostdata->NOP_insn;
|
|
--i, ncrcurrent += 2 /* JUMP instructions are two words */);
|
|
|
|
if (i > 0) {
|
|
++hostdata->busy[tmp->device->id][tmp->device->lun];
|
|
cmd->next = hostdata->running_list;
|
|
hostdata->running_list = cmd;
|
|
|
|
/* Restore this instruction to a NOP once the command starts */
|
|
cmd->dsa [(hostdata->dsa_jump_dest - hostdata->dsa_start) /
|
|
sizeof(u32)] = (u32) virt_to_bus ((void *)ncrcurrent);
|
|
/* Replace the current jump operand. */
|
|
ncrcurrent[1] =
|
|
virt_to_bus ((void *) cmd->dsa) + hostdata->E_dsa_code_begin -
|
|
hostdata->E_dsa_code_template;
|
|
/* Replace the NOP instruction with a JUMP */
|
|
ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) |
|
|
DBC_TCI_TRUE;
|
|
} else {
|
|
printk ("scsi%d: no free slot\n", host->host_no);
|
|
disable(host);
|
|
tmp->result = (DID_ERROR << 16);
|
|
cmd->next = (struct NCR53c7x0_cmd *) hostdata->free;
|
|
hostdata->free = cmd;
|
|
tmp->scsi_done(tmp);
|
|
local_irq_restore(flags);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If the NCR chip is in an idle state, start it running the scheduler
|
|
* immediately. Otherwise, signal the chip to jump to schedule as
|
|
* soon as it is idle.
|
|
*/
|
|
|
|
if (hostdata->idle) {
|
|
hostdata->idle = 0;
|
|
hostdata->state = STATE_RUNNING;
|
|
NCR53c7x0_write32 (DSP_REG, virt_to_bus ((void *)hostdata->schedule));
|
|
if (hostdata->options & OPTION_DEBUG_TRACE)
|
|
NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl |
|
|
DCNTL_SSM | DCNTL_STD);
|
|
} else {
|
|
NCR53c7x0_write8(hostdata->istat, ISTAT_10_SIGP);
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* Function : busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata
|
|
* *hostdata, Scsi_Cmnd *cmd)
|
|
*
|
|
* Purpose : decide if we can pass the given SCSI command on to the
|
|
* device in question or not.
|
|
*
|
|
* Returns : non-zero when we're busy, 0 when we aren't.
|
|
*/
|
|
|
|
static __inline__ int
|
|
busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata,
|
|
Scsi_Cmnd *cmd) {
|
|
/* FIXME : in the future, this needs to accommodate SCSI-II tagged
|
|
queuing, and we may be able to play with fairness here a bit.
|
|
*/
|
|
return hostdata->busy[cmd->device->id][cmd->device->lun];
|
|
}
|
|
|
|
/*
|
|
* Function : process_issue_queue (void)
|
|
*
|
|
* Purpose : transfer commands from the issue queue to NCR start queue
|
|
* of each NCR53c7/8xx in the system, avoiding kernel stack
|
|
* overflows when the scsi_done() function is invoked recursively.
|
|
*
|
|
* NOTE : process_issue_queue exits with interrupts *disabled*, so the
|
|
* caller must reenable them if it desires.
|
|
*
|
|
* NOTE : process_issue_queue should be called from both
|
|
* NCR53c7x0_queue_command() and from the interrupt handler
|
|
* after command completion in case NCR53c7x0_queue_command()
|
|
* isn't invoked again but we've freed up resources that are
|
|
* needed.
|
|
*/
|
|
|
|
static void
|
|
process_issue_queue (unsigned long flags) {
|
|
Scsi_Cmnd *tmp, *prev;
|
|
struct Scsi_Host *host;
|
|
struct NCR53c7x0_hostdata *hostdata;
|
|
int done;
|
|
|
|
/*
|
|
* We run (with interrupts disabled) until we're sure that none of
|
|
* the host adapters have anything that can be done, at which point
|
|
* we set process_issue_queue_running to 0 and exit.
|
|
*
|
|
* Interrupts are enabled before doing various other internal
|
|
* instructions, after we've decided that we need to run through
|
|
* the loop again.
|
|
*
|
|
*/
|
|
|
|
do {
|
|
local_irq_disable(); /* Freeze request queues */
|
|
done = 1;
|
|
for (host = first_host; host && host->hostt == the_template;
|
|
host = host->next) {
|
|
hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
local_irq_disable();
|
|
if (hostdata->issue_queue) {
|
|
if (hostdata->state == STATE_DISABLED) {
|
|
tmp = (Scsi_Cmnd *) hostdata->issue_queue;
|
|
hostdata->issue_queue = (Scsi_Cmnd *) tmp->SCp.ptr;
|
|
tmp->result = (DID_BAD_TARGET << 16);
|
|
if (tmp->host_scribble) {
|
|
((struct NCR53c7x0_cmd *)tmp->host_scribble)->next =
|
|
hostdata->free;
|
|
hostdata->free =
|
|
(struct NCR53c7x0_cmd *)tmp->host_scribble;
|
|
tmp->host_scribble = NULL;
|
|
}
|
|
tmp->scsi_done (tmp);
|
|
done = 0;
|
|
} else
|
|
for (tmp = (Scsi_Cmnd *) hostdata->issue_queue,
|
|
prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *)
|
|
tmp->SCp.ptr)
|
|
if (!tmp->host_scribble ||
|
|
!busyp (host, hostdata, tmp)) {
|
|
if (prev)
|
|
prev->SCp.ptr = tmp->SCp.ptr;
|
|
else
|
|
hostdata->issue_queue = (Scsi_Cmnd *)
|
|
tmp->SCp.ptr;
|
|
tmp->SCp.ptr = NULL;
|
|
if (tmp->host_scribble) {
|
|
if (hostdata->options & OPTION_DEBUG_QUEUES)
|
|
printk ("scsi%d : moving command for target %d lun %d to start list\n",
|
|
host->host_no, tmp->device->id, tmp->device->lun);
|
|
|
|
|
|
to_schedule_list (host, hostdata,
|
|
(struct NCR53c7x0_cmd *)
|
|
tmp->host_scribble);
|
|
} else {
|
|
if (((tmp->result & 0xff) == 0xff) ||
|
|
((tmp->result & 0xff00) == 0xff00)) {
|
|
printk ("scsi%d : danger Will Robinson!\n",
|
|
host->host_no);
|
|
tmp->result = DID_ERROR << 16;
|
|
disable (host);
|
|
}
|
|
tmp->scsi_done(tmp);
|
|
}
|
|
done = 0;
|
|
} /* if target/lun is not busy */
|
|
} /* if hostdata->issue_queue */
|
|
if (!done)
|
|
local_irq_restore(flags);
|
|
} /* for host */
|
|
} while (!done);
|
|
process_issue_queue_running = 0;
|
|
}
|
|
|
|
/*
|
|
* Function : static void intr_scsi (struct Scsi_Host *host,
|
|
* struct NCR53c7x0_cmd *cmd)
|
|
*
|
|
* Purpose : handle all SCSI interrupts, indicated by the setting
|
|
* of the SIP bit in the ISTAT register.
|
|
*
|
|
* Inputs : host, cmd - host and NCR command causing the interrupt, cmd
|
|
* may be NULL.
|
|
*/
|
|
|
|
static void
|
|
intr_scsi (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata =
|
|
(struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
unsigned char sstat0_sist0, sist1, /* Registers */
|
|
fatal; /* Did a fatal interrupt
|
|
occur ? */
|
|
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
fatal = 0;
|
|
|
|
sstat0_sist0 = NCR53c7x0_read8(SSTAT0_REG);
|
|
sist1 = 0;
|
|
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : SIST0 0x%0x, SIST1 0x%0x\n", host->host_no,
|
|
sstat0_sist0, sist1);
|
|
|
|
/* 250ms selection timeout */
|
|
if (sstat0_sist0 & SSTAT0_700_STO) {
|
|
fatal = 1;
|
|
if (hostdata->options & OPTION_DEBUG_INTR) {
|
|
printk ("scsi%d : Selection Timeout\n", host->host_no);
|
|
if (cmd) {
|
|
printk("scsi%d : target %d, lun %d, command ",
|
|
host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun);
|
|
__scsi_print_command (cmd->cmd->cmnd);
|
|
printk("scsi%d : dsp = 0x%x (virt 0x%p)\n", host->host_no,
|
|
NCR53c7x0_read32(DSP_REG),
|
|
bus_to_virt(NCR53c7x0_read32(DSP_REG)));
|
|
} else {
|
|
printk("scsi%d : no command\n", host->host_no);
|
|
}
|
|
}
|
|
/*
|
|
* XXX - question : how do we want to handle the Illegal Instruction
|
|
* interrupt, which may occur before or after the Selection Timeout
|
|
* interrupt?
|
|
*/
|
|
|
|
if (1) {
|
|
hostdata->idle = 1;
|
|
hostdata->expecting_sto = 0;
|
|
|
|
if (hostdata->test_running) {
|
|
hostdata->test_running = 0;
|
|
hostdata->test_completed = 3;
|
|
} else if (cmd) {
|
|
abnormal_finished(cmd, DID_BAD_TARGET << 16);
|
|
}
|
|
#if 0
|
|
hostdata->intrs = 0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* FIXME : in theory, we can also get a UDC when a STO occurs.
|
|
*/
|
|
if (sstat0_sist0 & SSTAT0_UDC) {
|
|
fatal = 1;
|
|
if (cmd) {
|
|
printk("scsi%d : target %d lun %d unexpected disconnect\n",
|
|
host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun);
|
|
print_lots (host);
|
|
abnormal_finished(cmd, DID_ERROR << 16);
|
|
} else
|
|
printk("scsi%d : unexpected disconnect (no command)\n",
|
|
host->host_no);
|
|
|
|
hostdata->dsp = (u32 *) hostdata->schedule;
|
|
hostdata->dsp_changed = 1;
|
|
}
|
|
|
|
/* SCSI PARITY error */
|
|
if (sstat0_sist0 & SSTAT0_PAR) {
|
|
fatal = 1;
|
|
if (cmd && cmd->cmd) {
|
|
printk("scsi%d : target %d lun %d parity error.\n",
|
|
host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun);
|
|
abnormal_finished (cmd, DID_PARITY << 16);
|
|
} else
|
|
printk("scsi%d : parity error\n", host->host_no);
|
|
/* Should send message out, parity error */
|
|
|
|
/* XXX - Reduce synchronous transfer rate! */
|
|
hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
/* SCSI GROSS error */
|
|
}
|
|
|
|
if (sstat0_sist0 & SSTAT0_SGE) {
|
|
fatal = 1;
|
|
printk("scsi%d : gross error, saved2_dsa = 0x%x\n", host->host_no,
|
|
(unsigned int)hostdata->saved2_dsa);
|
|
print_lots (host);
|
|
|
|
/*
|
|
* A SCSI gross error may occur when we have
|
|
*
|
|
* - A synchronous offset which causes the SCSI FIFO to be overwritten.
|
|
*
|
|
* - A REQ which causes the maximum synchronous offset programmed in
|
|
* the SXFER register to be exceeded.
|
|
*
|
|
* - A phase change with an outstanding synchronous offset.
|
|
*
|
|
* - Residual data in the synchronous data FIFO, with a transfer
|
|
* other than a synchronous receive is started.$#
|
|
*/
|
|
|
|
|
|
/* XXX Should deduce synchronous transfer rate! */
|
|
hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
/* Phase mismatch */
|
|
}
|
|
|
|
if (sstat0_sist0 & SSTAT0_MA) {
|
|
fatal = 1;
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : SSTAT0_MA\n", host->host_no);
|
|
intr_phase_mismatch (host, cmd);
|
|
}
|
|
|
|
#if 0
|
|
if (sstat0_sist0 & SIST0_800_RSL)
|
|
printk ("scsi%d : Oh no Mr. Bill!\n", host->host_no);
|
|
#endif
|
|
|
|
/*
|
|
* If a fatal SCSI interrupt occurs, we must insure that the DMA and
|
|
* SCSI FIFOs were flushed.
|
|
*/
|
|
|
|
if (fatal) {
|
|
if (!hostdata->dstat_valid) {
|
|
hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
|
|
hostdata->dstat_valid = 1;
|
|
}
|
|
|
|
if (!(hostdata->dstat & DSTAT_DFE)) {
|
|
printk ("scsi%d : DMA FIFO not empty\n", host->host_no);
|
|
/*
|
|
* Really need to check this code for 710 RGH.
|
|
* Havn't seen any problems, but maybe we should FLUSH before
|
|
* clearing sometimes.
|
|
*/
|
|
NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF);
|
|
while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF)
|
|
;
|
|
hostdata->dstat |= DSTAT_DFE;
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef CYCLIC_TRACE
|
|
|
|
/*
|
|
* The following implements a cyclic log of instructions executed, if you turn
|
|
* TRACE on. It will also print the log for you. Very useful when debugging
|
|
* 53c710 support, possibly not really needed any more.
|
|
*/
|
|
|
|
u32 insn_log[4096];
|
|
u32 insn_log_index = 0;
|
|
|
|
void log1 (u32 i)
|
|
{
|
|
insn_log[insn_log_index++] = i;
|
|
if (insn_log_index == 4096)
|
|
insn_log_index = 0;
|
|
}
|
|
|
|
void log_insn (u32 *ip)
|
|
{
|
|
log1 ((u32)ip);
|
|
log1 (*ip);
|
|
log1 (*(ip+1));
|
|
if (((*ip >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI)
|
|
log1 (*(ip+2));
|
|
}
|
|
|
|
void dump_log(void)
|
|
{
|
|
int cnt = 0;
|
|
int i = insn_log_index;
|
|
int size;
|
|
struct Scsi_Host *host = first_host;
|
|
|
|
while (cnt < 4096) {
|
|
printk ("%08x (+%6x): ", insn_log[i], (insn_log[i] - (u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4);
|
|
if (++i == 4096)
|
|
i = 0;
|
|
cnt++;
|
|
if (((insn_log[i] >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI)
|
|
size = 3;
|
|
else
|
|
size = 2;
|
|
while (size--) {
|
|
printk ("%08x ", insn_log[i]);
|
|
if (++i == 4096)
|
|
i = 0;
|
|
cnt++;
|
|
}
|
|
printk ("\n");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Function : static void NCR53c7x0_intfly (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : Scan command queue for specified host, looking for completed
|
|
* commands.
|
|
*
|
|
* Inputs : Scsi_Host pointer.
|
|
*
|
|
* This is called from the interrupt handler, when a simulated INTFLY
|
|
* interrupt occurs.
|
|
*/
|
|
|
|
static void
|
|
NCR53c7x0_intfly (struct Scsi_Host *host)
|
|
{
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */
|
|
struct NCR53c7x0_cmd *cmd, /* command which halted */
|
|
**cmd_prev_ptr;
|
|
unsigned long flags;
|
|
char search_found = 0; /* Got at least one ? */
|
|
|
|
hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : INTFLY\n", host->host_no);
|
|
|
|
/*
|
|
* Traverse our list of running commands, and look
|
|
* for those with valid (non-0xff ff) status and message
|
|
* bytes encoded in the result which signify command
|
|
* completion.
|
|
*/
|
|
|
|
local_irq_save(flags);
|
|
restart:
|
|
for (cmd_prev_ptr = (struct NCR53c7x0_cmd **)&(hostdata->running_list),
|
|
cmd = (struct NCR53c7x0_cmd *) hostdata->running_list; cmd ;
|
|
cmd_prev_ptr = (struct NCR53c7x0_cmd **) &(cmd->next),
|
|
cmd = (struct NCR53c7x0_cmd *) cmd->next)
|
|
{
|
|
Scsi_Cmnd *tmp;
|
|
|
|
if (!cmd) {
|
|
printk("scsi%d : very weird.\n", host->host_no);
|
|
break;
|
|
}
|
|
|
|
if (!(tmp = cmd->cmd)) {
|
|
printk("scsi%d : weird. NCR53c7x0_cmd has no Scsi_Cmnd\n",
|
|
host->host_no);
|
|
continue;
|
|
}
|
|
/* Copy the result over now; may not be complete,
|
|
* but subsequent tests may as well be done on
|
|
* cached memory.
|
|
*/
|
|
tmp->result = cmd->result;
|
|
|
|
if (((tmp->result & 0xff) == 0xff) ||
|
|
((tmp->result & 0xff00) == 0xff00))
|
|
continue;
|
|
|
|
search_found = 1;
|
|
|
|
if (cmd->bounce.len)
|
|
memcpy ((void *)cmd->bounce.addr,
|
|
(void *)cmd->bounce.buf, cmd->bounce.len);
|
|
|
|
/* Important - remove from list _before_ done is called */
|
|
if (cmd_prev_ptr)
|
|
*cmd_prev_ptr = (struct NCR53c7x0_cmd *) cmd->next;
|
|
|
|
--hostdata->busy[tmp->device->id][tmp->device->lun];
|
|
cmd->next = hostdata->free;
|
|
hostdata->free = cmd;
|
|
|
|
tmp->host_scribble = NULL;
|
|
|
|
if (hostdata->options & OPTION_DEBUG_INTR) {
|
|
printk ("scsi%d : command complete : pid %lu, id %d,lun %d result 0x%x ",
|
|
host->host_no, tmp->pid, tmp->device->id, tmp->device->lun, tmp->result);
|
|
__scsi_print_command (tmp->cmnd);
|
|
}
|
|
|
|
tmp->scsi_done(tmp);
|
|
goto restart;
|
|
}
|
|
local_irq_restore(flags);
|
|
|
|
if (!search_found) {
|
|
printk ("scsi%d : WARNING : INTFLY with no completed commands.\n",
|
|
host->host_no);
|
|
} else {
|
|
run_process_issue_queue();
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Function : static irqreturn_t NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs)
|
|
*
|
|
* Purpose : handle NCR53c7x0 interrupts for all NCR devices sharing
|
|
* the same IRQ line.
|
|
*
|
|
* Inputs : Since we're using the SA_INTERRUPT interrupt handler
|
|
* semantics, irq indicates the interrupt which invoked
|
|
* this handler.
|
|
*
|
|
* On the 710 we simualte an INTFLY with a script interrupt, and the
|
|
* script interrupt handler will call back to this function.
|
|
*/
|
|
|
|
static irqreturn_t
|
|
NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs)
|
|
{
|
|
NCR53c7x0_local_declare();
|
|
struct Scsi_Host *host; /* Host we are looking at */
|
|
unsigned char istat; /* Values of interrupt regs */
|
|
struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */
|
|
struct NCR53c7x0_cmd *cmd; /* command which halted */
|
|
u32 *dsa; /* DSA */
|
|
int handled = 0;
|
|
|
|
#ifdef NCR_DEBUG
|
|
char buf[80]; /* Debugging sprintf buffer */
|
|
size_t buflen; /* Length of same */
|
|
#endif
|
|
|
|
host = (struct Scsi_Host *)dev_id;
|
|
hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
/*
|
|
* Only read istat once per loop, since reading it again will unstack
|
|
* interrupts
|
|
*/
|
|
|
|
while ((istat = NCR53c7x0_read8(hostdata->istat)) & (ISTAT_SIP|ISTAT_DIP)) {
|
|
handled = 1;
|
|
hostdata->dsp_changed = 0;
|
|
hostdata->dstat_valid = 0;
|
|
hostdata->state = STATE_HALTED;
|
|
|
|
if (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK)
|
|
printk ("scsi%d : SCSI FIFO not empty\n", host->host_no);
|
|
|
|
/*
|
|
* NCR53c700 and NCR53c700-66 change the current SCSI
|
|
* process, hostdata->ncrcurrent, in the Linux driver so
|
|
* cmd = hostdata->ncrcurrent.
|
|
*
|
|
* With other chips, we must look through the commands
|
|
* executing and find the command structure which
|
|
* corresponds to the DSA register.
|
|
*/
|
|
|
|
if (hostdata->options & OPTION_700) {
|
|
cmd = (struct NCR53c7x0_cmd *) hostdata->ncrcurrent;
|
|
} else {
|
|
dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
|
|
for (cmd = (struct NCR53c7x0_cmd *) hostdata->running_list;
|
|
cmd && (dsa + (hostdata->dsa_start / sizeof(u32))) != cmd->dsa;
|
|
cmd = (struct NCR53c7x0_cmd *)(cmd->next))
|
|
;
|
|
}
|
|
if (hostdata->options & OPTION_DEBUG_INTR) {
|
|
if (cmd) {
|
|
printk("scsi%d : interrupt for pid %lu, id %d, lun %d ",
|
|
host->host_no, cmd->cmd->pid, (int) cmd->cmd->device->id,
|
|
(int) cmd->cmd->device->lun);
|
|
__scsi_print_command (cmd->cmd->cmnd);
|
|
} else {
|
|
printk("scsi%d : no active command\n", host->host_no);
|
|
}
|
|
}
|
|
|
|
if (istat & ISTAT_SIP) {
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : ISTAT_SIP\n", host->host_no);
|
|
intr_scsi (host, cmd);
|
|
}
|
|
|
|
if (istat & ISTAT_DIP) {
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : ISTAT_DIP\n", host->host_no);
|
|
intr_dma (host, cmd);
|
|
}
|
|
|
|
if (!hostdata->dstat_valid) {
|
|
hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
|
|
hostdata->dstat_valid = 1;
|
|
}
|
|
|
|
if (!(hostdata->dstat & DSTAT_DFE)) {
|
|
printk ("scsi%d : DMA FIFO not empty\n", host->host_no);
|
|
/* Really need to check this out for 710 RGH */
|
|
NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF);
|
|
while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF)
|
|
;
|
|
hostdata->dstat |= DSTAT_DFE;
|
|
}
|
|
|
|
if (!hostdata->idle && hostdata->state == STATE_HALTED) {
|
|
if (!hostdata->dsp_changed)
|
|
hostdata->dsp = (u32 *)bus_to_virt(NCR53c7x0_read32(DSP_REG));
|
|
#if 0
|
|
printk("scsi%d : new dsp is 0x%lx (virt 0x%p)\n",
|
|
host->host_no, virt_to_bus(hostdata->dsp), hostdata->dsp);
|
|
#endif
|
|
|
|
hostdata->state = STATE_RUNNING;
|
|
NCR53c7x0_write32 (DSP_REG, virt_to_bus(hostdata->dsp));
|
|
if (hostdata->options & OPTION_DEBUG_TRACE) {
|
|
#ifdef CYCLIC_TRACE
|
|
log_insn (hostdata->dsp);
|
|
#else
|
|
print_insn (host, hostdata->dsp, "t ", 1);
|
|
#endif
|
|
NCR53c7x0_write8 (DCNTL_REG,
|
|
hostdata->saved_dcntl | DCNTL_SSM | DCNTL_STD);
|
|
}
|
|
}
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
/*
|
|
* Function : static int abort_connected (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : Assuming that the NCR SCSI processor is currently
|
|
* halted, break the currently established nexus. Clean
|
|
* up of the NCR53c7x0_cmd and Scsi_Cmnd structures should
|
|
* be done on receipt of the abort interrupt.
|
|
*
|
|
* Inputs : host - SCSI host
|
|
*
|
|
*/
|
|
|
|
static int
|
|
abort_connected (struct Scsi_Host *host) {
|
|
#ifdef NEW_ABORT
|
|
NCR53c7x0_local_declare();
|
|
#endif
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
/* FIXME : this probably should change for production kernels; at the
|
|
least, counter should move to a per-host structure. */
|
|
static int counter = 5;
|
|
#ifdef NEW_ABORT
|
|
int sstat, phase, offset;
|
|
u32 *script;
|
|
NCR53c7x0_local_setup(host);
|
|
#endif
|
|
|
|
if (--counter <= 0) {
|
|
disable(host);
|
|
return 0;
|
|
}
|
|
|
|
printk ("scsi%d : DANGER : abort_connected() called \n",
|
|
host->host_no);
|
|
|
|
#ifdef NEW_ABORT
|
|
|
|
/*
|
|
* New strategy : Rather than using a generic abort routine,
|
|
* we'll specifically try to source or sink the appropriate
|
|
* amount of data for the phase we're currently in (taking into
|
|
* account the current synchronous offset)
|
|
*/
|
|
|
|
sstat = (NCR53c8x0_read8 (SSTAT2_REG);
|
|
offset = OFFSET (sstat & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT;
|
|
phase = sstat & SSTAT2_PHASE_MASK;
|
|
|
|
/*
|
|
* SET ATN
|
|
* MOVE source_or_sink, WHEN CURRENT PHASE
|
|
* < repeat for each outstanding byte >
|
|
* JUMP send_abort_message
|
|
*/
|
|
|
|
script = hostdata->abort_script = kmalloc (
|
|
8 /* instruction size */ * (
|
|
1 /* set ATN */ +
|
|
(!offset ? 1 : offset) /* One transfer per outstanding byte */ +
|
|
1 /* send abort message */),
|
|
GFP_ATOMIC);
|
|
|
|
|
|
#else /* def NEW_ABORT */
|
|
hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
|
|
sizeof(u32);
|
|
#endif /* def NEW_ABORT */
|
|
hostdata->dsp_changed = 1;
|
|
|
|
/* XXX - need to flag the command as aborted after the abort_connected
|
|
code runs
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function : static int datapath_residual (Scsi_Host *host)
|
|
*
|
|
* Purpose : return residual data count of what's in the chip.
|
|
*
|
|
* Inputs : host - SCSI host
|
|
*/
|
|
|
|
static int
|
|
datapath_residual (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
int count, synchronous, sstat;
|
|
unsigned int ddir;
|
|
|
|
NCR53c7x0_local_setup(host);
|
|
/* COMPAT : the 700 and 700-66 need to use DFIFO_00_BO_MASK */
|
|
count = ((NCR53c7x0_read8 (DFIFO_REG) & DFIFO_10_BO_MASK) -
|
|
(NCR53c7x0_read32 (DBC_REG) & DFIFO_10_BO_MASK)) & DFIFO_10_BO_MASK;
|
|
synchronous = NCR53c7x0_read8 (SXFER_REG) & SXFER_MO_MASK;
|
|
/* COMPAT : DDIR is elsewhere on non-'8xx chips. */
|
|
ddir = NCR53c7x0_read8 (CTEST0_REG_700) & CTEST0_700_DDIR;
|
|
|
|
if (ddir) {
|
|
/* Receive */
|
|
if (synchronous)
|
|
count += (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT;
|
|
else
|
|
if (NCR53c7x0_read8 (SSTAT1_REG) & SSTAT1_ILF)
|
|
++count;
|
|
} else {
|
|
/* Send */
|
|
sstat = NCR53c7x0_read8 (SSTAT1_REG);
|
|
if (sstat & SSTAT1_OLF)
|
|
++count;
|
|
if (synchronous && (sstat & SSTAT1_ORF))
|
|
++count;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* Function : static const char * sbcl_to_phase (int sbcl)_
|
|
*
|
|
* Purpose : Convert SBCL register to user-parsable phase representation
|
|
*
|
|
* Inputs : sbcl - value of sbcl register
|
|
*/
|
|
|
|
|
|
static const char *
|
|
sbcl_to_phase (int sbcl) {
|
|
switch (sbcl & SBCL_PHASE_MASK) {
|
|
case SBCL_PHASE_DATAIN:
|
|
return "DATAIN";
|
|
case SBCL_PHASE_DATAOUT:
|
|
return "DATAOUT";
|
|
case SBCL_PHASE_MSGIN:
|
|
return "MSGIN";
|
|
case SBCL_PHASE_MSGOUT:
|
|
return "MSGOUT";
|
|
case SBCL_PHASE_CMDOUT:
|
|
return "CMDOUT";
|
|
case SBCL_PHASE_STATIN:
|
|
return "STATUSIN";
|
|
default:
|
|
return "unknown";
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function : static const char * sstat2_to_phase (int sstat)_
|
|
*
|
|
* Purpose : Convert SSTAT2 register to user-parsable phase representation
|
|
*
|
|
* Inputs : sstat - value of sstat register
|
|
*/
|
|
|
|
|
|
static const char *
|
|
sstat2_to_phase (int sstat) {
|
|
switch (sstat & SSTAT2_PHASE_MASK) {
|
|
case SSTAT2_PHASE_DATAIN:
|
|
return "DATAIN";
|
|
case SSTAT2_PHASE_DATAOUT:
|
|
return "DATAOUT";
|
|
case SSTAT2_PHASE_MSGIN:
|
|
return "MSGIN";
|
|
case SSTAT2_PHASE_MSGOUT:
|
|
return "MSGOUT";
|
|
case SSTAT2_PHASE_CMDOUT:
|
|
return "CMDOUT";
|
|
case SSTAT2_PHASE_STATIN:
|
|
return "STATUSIN";
|
|
default:
|
|
return "unknown";
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function : static void intr_phase_mismatch (struct Scsi_Host *host,
|
|
* struct NCR53c7x0_cmd *cmd)
|
|
*
|
|
* Purpose : Handle phase mismatch interrupts
|
|
*
|
|
* Inputs : host, cmd - host and NCR command causing the interrupt, cmd
|
|
* may be NULL.
|
|
*
|
|
* Side effects : The abort_connected() routine is called or the NCR chip
|
|
* is restarted, jumping to the command_complete entry point, or
|
|
* patching the address and transfer count of the current instruction
|
|
* and calling the msg_in entry point as appropriate.
|
|
*/
|
|
|
|
static void
|
|
intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
u32 dbc_dcmd, *dsp, *dsp_next;
|
|
unsigned char dcmd, sbcl;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
int residual;
|
|
enum {ACTION_ABORT, ACTION_ABORT_PRINT, ACTION_CONTINUE} action =
|
|
ACTION_ABORT_PRINT;
|
|
const char *where = NULL;
|
|
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
/*
|
|
* Corrective action is based on where in the SCSI SCRIPT(tm) the error
|
|
* occurred, as well as which SCSI phase we are currently in.
|
|
*/
|
|
dsp_next = bus_to_virt(NCR53c7x0_read32(DSP_REG));
|
|
|
|
/*
|
|
* Fetch the current instruction, and remove the operands for easier
|
|
* interpretation.
|
|
*/
|
|
dbc_dcmd = NCR53c7x0_read32(DBC_REG);
|
|
dcmd = (dbc_dcmd & 0xff000000) >> 24;
|
|
/*
|
|
* Like other processors, the NCR adjusts the instruction pointer before
|
|
* instruction decode. Set the DSP address back to what it should
|
|
* be for this instruction based on its size (2 or 3 32 bit words).
|
|
*/
|
|
dsp = dsp_next - NCR53c7x0_insn_size(dcmd);
|
|
|
|
|
|
/*
|
|
* Read new SCSI phase from the SBCL lines. Since all of our code uses
|
|
* a WHEN conditional instead of an IF conditional, we don't need to
|
|
* wait for a new REQ.
|
|
*/
|
|
sbcl = NCR53c7x0_read8(SBCL_REG) & SBCL_PHASE_MASK;
|
|
|
|
if (!cmd) {
|
|
action = ACTION_ABORT_PRINT;
|
|
where = "no current command";
|
|
/*
|
|
* The way my SCSI SCRIPTS(tm) are architected, recoverable phase
|
|
* mismatches should only occur where we're doing a multi-byte
|
|
* BMI instruction. Specifically, this means
|
|
*
|
|
* - select messages (a SCSI-I target may ignore additional messages
|
|
* after the IDENTIFY; any target may reject a SDTR or WDTR)
|
|
*
|
|
* - command out (targets may send a message to signal an error
|
|
* condition, or go into STATUSIN after they've decided
|
|
* they don't like the command.
|
|
*
|
|
* - reply_message (targets may reject a multi-byte message in the
|
|
* middle)
|
|
*
|
|
* - data transfer routines (command completion with buffer space
|
|
* left, disconnect message, or error message)
|
|
*/
|
|
} else if (((dsp >= cmd->data_transfer_start &&
|
|
dsp < cmd->data_transfer_end)) || dsp == (cmd->residual + 2)) {
|
|
if ((dcmd & (DCMD_TYPE_MASK|DCMD_BMI_OP_MASK|DCMD_BMI_INDIRECT|
|
|
DCMD_BMI_MSG|DCMD_BMI_CD)) == (DCMD_TYPE_BMI|
|
|
DCMD_BMI_OP_MOVE_I)) {
|
|
residual = datapath_residual (host);
|
|
if (hostdata->options & OPTION_DEBUG_DISCONNECT)
|
|
printk ("scsi%d : handling residual transfer (+ %d bytes from DMA FIFO)\n",
|
|
host->host_no, residual);
|
|
|
|
/*
|
|
* The first instruction is a CALL to the alternate handler for
|
|
* this data transfer phase, so we can do calls to
|
|
* munge_msg_restart as we would if control were passed
|
|
* from normal dynamic code.
|
|
*/
|
|
if (dsp != cmd->residual + 2) {
|
|
cmd->residual[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL |
|
|
((dcmd & DCMD_BMI_IO) ? DCMD_TCI_IO : 0)) << 24) |
|
|
DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE;
|
|
cmd->residual[1] = virt_to_bus(hostdata->script)
|
|
+ ((dcmd & DCMD_BMI_IO)
|
|
? hostdata->E_other_in : hostdata->E_other_out);
|
|
}
|
|
|
|
/*
|
|
* The second instruction is the a data transfer block
|
|
* move instruction, reflecting the pointer and count at the
|
|
* time of the phase mismatch.
|
|
*/
|
|
cmd->residual[2] = dbc_dcmd + residual;
|
|
cmd->residual[3] = NCR53c7x0_read32(DNAD_REG) - residual;
|
|
|
|
/*
|
|
* The third and final instruction is a jump to the instruction
|
|
* which follows the instruction which had to be 'split'
|
|
*/
|
|
if (dsp != cmd->residual + 2) {
|
|
cmd->residual[4] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP)
|
|
<< 24) | DBC_TCI_TRUE;
|
|
cmd->residual[5] = virt_to_bus(dsp_next);
|
|
}
|
|
|
|
/*
|
|
* For the sake of simplicity, transfer control to the
|
|
* conditional CALL at the start of the residual buffer.
|
|
*/
|
|
hostdata->dsp = cmd->residual;
|
|
hostdata->dsp_changed = 1;
|
|
action = ACTION_CONTINUE;
|
|
} else {
|
|
where = "non-BMI dynamic DSA code";
|
|
action = ACTION_ABORT_PRINT;
|
|
}
|
|
} else if (dsp == (hostdata->script + hostdata->E_select_msgout / 4 + 2)) {
|
|
/* RGH 290697: Added +2 above, to compensate for the script
|
|
* instruction which disables the selection timer. */
|
|
/* Release ATN */
|
|
NCR53c7x0_write8 (SOCL_REG, 0);
|
|
switch (sbcl) {
|
|
/*
|
|
* Some devices (SQ555 come to mind) grab the IDENTIFY message
|
|
* sent on selection, and decide to go into COMMAND OUT phase
|
|
* rather than accepting the rest of the messages or rejecting
|
|
* them. Handle these devices gracefully.
|
|
*/
|
|
case SBCL_PHASE_CMDOUT:
|
|
hostdata->dsp = dsp + 2 /* two _words_ */;
|
|
hostdata->dsp_changed = 1;
|
|
printk ("scsi%d : target %d ignored SDTR and went into COMMAND OUT\n",
|
|
host->host_no, cmd->cmd->device->id);
|
|
cmd->flags &= ~CMD_FLAG_SDTR;
|
|
action = ACTION_CONTINUE;
|
|
break;
|
|
case SBCL_PHASE_MSGIN:
|
|
hostdata->dsp = hostdata->script + hostdata->E_msg_in /
|
|
sizeof(u32);
|
|
hostdata->dsp_changed = 1;
|
|
action = ACTION_CONTINUE;
|
|
break;
|
|
default:
|
|
where="select message out";
|
|
action = ACTION_ABORT_PRINT;
|
|
}
|
|
/*
|
|
* Some SCSI devices will interpret a command as they read the bytes
|
|
* off the SCSI bus, and may decide that the command is Bogus before
|
|
* they've read the entire command off the bus.
|
|
*/
|
|
} else if (dsp == hostdata->script + hostdata->E_cmdout_cmdout / sizeof
|
|
(u32)) {
|
|
hostdata->dsp = hostdata->script + hostdata->E_data_transfer /
|
|
sizeof (u32);
|
|
hostdata->dsp_changed = 1;
|
|
action = ACTION_CONTINUE;
|
|
/* FIXME : we need to handle message reject, etc. within msg_respond. */
|
|
#ifdef notyet
|
|
} else if (dsp == hostdata->script + hostdata->E_reply_message) {
|
|
switch (sbcl) {
|
|
/* Any other phase mismatches abort the currently executing command. */
|
|
#endif
|
|
} else {
|
|
where = "unknown location";
|
|
action = ACTION_ABORT_PRINT;
|
|
}
|
|
|
|
/* Flush DMA FIFO */
|
|
if (!hostdata->dstat_valid) {
|
|
hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
|
|
hostdata->dstat_valid = 1;
|
|
}
|
|
if (!(hostdata->dstat & DSTAT_DFE)) {
|
|
/* Really need to check this out for 710 RGH */
|
|
NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF);
|
|
while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF);
|
|
hostdata->dstat |= DSTAT_DFE;
|
|
}
|
|
|
|
switch (action) {
|
|
case ACTION_ABORT_PRINT:
|
|
printk("scsi%d : %s : unexpected phase %s.\n",
|
|
host->host_no, where ? where : "unknown location",
|
|
sbcl_to_phase(sbcl));
|
|
print_lots (host);
|
|
/* Fall through to ACTION_ABORT */
|
|
case ACTION_ABORT:
|
|
abort_connected (host);
|
|
break;
|
|
case ACTION_CONTINUE:
|
|
break;
|
|
}
|
|
|
|
#if 0
|
|
if (hostdata->dsp_changed) {
|
|
printk("scsi%d: new dsp 0x%p\n", host->host_no, hostdata->dsp);
|
|
print_insn (host, hostdata->dsp, "", 1);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Function : static void intr_bf (struct Scsi_Host *host,
|
|
* struct NCR53c7x0_cmd *cmd)
|
|
*
|
|
* Purpose : handle BUS FAULT interrupts
|
|
*
|
|
* Inputs : host, cmd - host and NCR command causing the interrupt, cmd
|
|
* may be NULL.
|
|
*/
|
|
|
|
static void
|
|
intr_bf (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
u32 *dsp,
|
|
*next_dsp, /* Current dsp */
|
|
*dsa,
|
|
dbc_dcmd; /* DCMD (high eight bits) + DBC */
|
|
char *reason = NULL;
|
|
/* Default behavior is for a silent error, with a retry until we've
|
|
exhausted retries. */
|
|
enum {MAYBE, ALWAYS, NEVER} retry = MAYBE;
|
|
int report = 0;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
dbc_dcmd = NCR53c7x0_read32 (DBC_REG);
|
|
next_dsp = bus_to_virt (NCR53c7x0_read32(DSP_REG));
|
|
dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff);
|
|
/* FIXME - check chip type */
|
|
dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG));
|
|
|
|
/*
|
|
* Bus faults can be caused by either a Bad Address or
|
|
* Target Abort. We should check the Received Target Abort
|
|
* bit of the PCI status register and Master Abort Bit.
|
|
*
|
|
* - Master Abort bit indicates that no device claimed
|
|
* the address with DEVSEL within five clocks
|
|
*
|
|
* - Target Abort bit indicates that a target claimed it,
|
|
* but changed its mind once it saw the byte enables.
|
|
*
|
|
*/
|
|
|
|
/* 53c710, not PCI system */
|
|
report = 1;
|
|
reason = "Unknown";
|
|
|
|
#ifndef notyet
|
|
report = 1;
|
|
#endif
|
|
if (report && reason)
|
|
{
|
|
printk(KERN_ALERT "scsi%d : BUS FAULT reason = %s\n",
|
|
host->host_no, reason ? reason : "unknown");
|
|
print_lots (host);
|
|
}
|
|
|
|
#ifndef notyet
|
|
retry = NEVER;
|
|
#endif
|
|
|
|
/*
|
|
* TODO : we should attempt to recover from any spurious bus
|
|
* faults. After X retries, we should figure that things are
|
|
* sufficiently wedged, and call NCR53c7xx_reset.
|
|
*
|
|
* This code should only get executed once we've decided that we
|
|
* cannot retry.
|
|
*/
|
|
|
|
if (retry == NEVER) {
|
|
printk(KERN_ALERT " mail richard@sleepie.demon.co.uk\n");
|
|
FATAL (host);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function : static void intr_dma (struct Scsi_Host *host,
|
|
* struct NCR53c7x0_cmd *cmd)
|
|
*
|
|
* Purpose : handle all DMA interrupts, indicated by the setting
|
|
* of the DIP bit in the ISTAT register.
|
|
*
|
|
* Inputs : host, cmd - host and NCR command causing the interrupt, cmd
|
|
* may be NULL.
|
|
*/
|
|
|
|
static void
|
|
intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
unsigned char dstat; /* DSTAT */
|
|
u32 *dsp,
|
|
*next_dsp, /* Current dsp */
|
|
*dsa,
|
|
dbc_dcmd; /* DCMD (high eight bits) + DBC */
|
|
int tmp;
|
|
unsigned long flags;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
if (!hostdata->dstat_valid) {
|
|
hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
|
|
hostdata->dstat_valid = 1;
|
|
}
|
|
|
|
dstat = hostdata->dstat;
|
|
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk("scsi%d : DSTAT=0x%x\n", host->host_no, (int) dstat);
|
|
|
|
dbc_dcmd = NCR53c7x0_read32 (DBC_REG);
|
|
next_dsp = bus_to_virt(NCR53c7x0_read32(DSP_REG));
|
|
dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff);
|
|
/* XXX - check chip type */
|
|
dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
|
|
|
|
/*
|
|
* DSTAT_ABRT is the aborted interrupt. This is set whenever the
|
|
* SCSI chip is aborted.
|
|
*
|
|
* With NCR53c700 and NCR53c700-66 style chips, we should only
|
|
* get this when the chip is currently running the accept
|
|
* reselect/select code and we have set the abort bit in the
|
|
* ISTAT register.
|
|
*
|
|
*/
|
|
|
|
if (dstat & DSTAT_ABRT) {
|
|
#if 0
|
|
/* XXX - add code here to deal with normal abort */
|
|
if ((hostdata->options & OPTION_700) && (hostdata->state ==
|
|
STATE_ABORTING)) {
|
|
} else
|
|
#endif
|
|
{
|
|
printk(KERN_ALERT "scsi%d : unexpected abort interrupt at\n"
|
|
" ", host->host_no);
|
|
print_insn (host, dsp, KERN_ALERT "s ", 1);
|
|
FATAL (host);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DSTAT_SSI is the single step interrupt. Should be generated
|
|
* whenever we have single stepped or are tracing.
|
|
*/
|
|
|
|
if (dstat & DSTAT_SSI) {
|
|
if (hostdata->options & OPTION_DEBUG_TRACE) {
|
|
/* Don't print instr. until we write DSP at end of intr function */
|
|
} else if (hostdata->options & OPTION_DEBUG_SINGLE) {
|
|
print_insn (host, dsp, "s ", 0);
|
|
local_irq_save(flags);
|
|
/* XXX - should we do this, or can we get away with writing dsp? */
|
|
|
|
NCR53c7x0_write8 (DCNTL_REG, (NCR53c7x0_read8(DCNTL_REG) &
|
|
~DCNTL_SSM) | DCNTL_STD);
|
|
local_irq_restore(flags);
|
|
} else {
|
|
printk(KERN_ALERT "scsi%d : unexpected single step interrupt at\n"
|
|
" ", host->host_no);
|
|
print_insn (host, dsp, KERN_ALERT "", 1);
|
|
printk(KERN_ALERT " mail drew@PoohSticks.ORG\n");
|
|
FATAL (host);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DSTAT_IID / DSTAT_OPC (same bit, same meaning, only the name
|
|
* is different) is generated whenever an illegal instruction is
|
|
* encountered.
|
|
*
|
|
* XXX - we may want to emulate INTFLY here, so we can use
|
|
* the same SCSI SCRIPT (tm) for NCR53c710 through NCR53c810
|
|
* chips.
|
|
*/
|
|
|
|
if (dstat & DSTAT_OPC) {
|
|
/*
|
|
* Ascertain if this IID interrupts occurred before or after a STO
|
|
* interrupt. Since the interrupt handling code now leaves
|
|
* DSP unmodified until _after_ all stacked interrupts have been
|
|
* processed, reading the DSP returns the original DSP register.
|
|
* This means that if dsp lies between the select code, and
|
|
* message out following the selection code (where the IID interrupt
|
|
* would have to have occurred by due to the implicit wait for REQ),
|
|
* we have an IID interrupt resulting from a STO condition and
|
|
* can ignore it.
|
|
*/
|
|
|
|
if (((dsp >= (hostdata->script + hostdata->E_select / sizeof(u32))) &&
|
|
(dsp <= (hostdata->script + hostdata->E_select_msgout /
|
|
sizeof(u32) + 8))) || (hostdata->test_running == 2)) {
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : ignoring DSTAT_IID for SSTAT_STO\n",
|
|
host->host_no);
|
|
if (hostdata->expecting_iid) {
|
|
hostdata->expecting_iid = 0;
|
|
hostdata->idle = 1;
|
|
if (hostdata->test_running == 2) {
|
|
hostdata->test_running = 0;
|
|
hostdata->test_completed = 3;
|
|
} else if (cmd)
|
|
abnormal_finished (cmd, DID_BAD_TARGET << 16);
|
|
} else {
|
|
hostdata->expecting_sto = 1;
|
|
}
|
|
/*
|
|
* We can't guarantee we'll be able to execute the WAIT DISCONNECT
|
|
* instruction within the 3.4us of bus free and arbitration delay
|
|
* that a target can RESELECT in and assert REQ after we've dropped
|
|
* ACK. If this happens, we'll get an illegal instruction interrupt.
|
|
* Doing away with the WAIT DISCONNECT instructions broke everything,
|
|
* so instead I'll settle for moving one WAIT DISCONNECT a few
|
|
* instructions closer to the CLEAR ACK before it to minimize the
|
|
* chances of this happening, and handle it if it occurs anyway.
|
|
*
|
|
* Simply continue with what we were doing, and control should
|
|
* be transferred to the schedule routine which will ultimately
|
|
* pass control onto the reselection or selection (not yet)
|
|
* code.
|
|
*/
|
|
} else if (dbc_dcmd == 0x48000000 && (NCR53c7x0_read8 (SBCL_REG) &
|
|
SBCL_REQ)) {
|
|
if (!(hostdata->options & OPTION_NO_PRINT_RACE))
|
|
{
|
|
printk("scsi%d: REQ before WAIT DISCONNECT IID\n",
|
|
host->host_no);
|
|
hostdata->options |= OPTION_NO_PRINT_RACE;
|
|
}
|
|
} else {
|
|
printk(KERN_ALERT "scsi%d : invalid instruction\n", host->host_no);
|
|
print_lots (host);
|
|
printk(KERN_ALERT " mail Richard@sleepie.demon.co.uk with ALL\n"
|
|
" boot messages and diagnostic output\n");
|
|
FATAL (host);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DSTAT_BF are bus fault errors. DSTAT_800_BF is valid for 710 also.
|
|
*/
|
|
|
|
if (dstat & DSTAT_800_BF) {
|
|
intr_bf (host, cmd);
|
|
}
|
|
|
|
|
|
/*
|
|
* DSTAT_SIR interrupts are generated by the execution of
|
|
* the INT instruction. Since the exact values available
|
|
* are determined entirely by the SCSI script running,
|
|
* and are local to a particular script, a unique handler
|
|
* is called for each script.
|
|
*/
|
|
|
|
if (dstat & DSTAT_SIR) {
|
|
if (hostdata->options & OPTION_DEBUG_INTR)
|
|
printk ("scsi%d : DSTAT_SIR\n", host->host_no);
|
|
switch ((tmp = hostdata->dstat_sir_intr (host, cmd))) {
|
|
case SPECIFIC_INT_NOTHING:
|
|
case SPECIFIC_INT_RESTART:
|
|
break;
|
|
case SPECIFIC_INT_ABORT:
|
|
abort_connected(host);
|
|
break;
|
|
case SPECIFIC_INT_PANIC:
|
|
printk(KERN_ALERT "scsi%d : failure at ", host->host_no);
|
|
print_insn (host, dsp, KERN_ALERT "", 1);
|
|
printk(KERN_ALERT " dstat_sir_intr() returned SPECIFIC_INT_PANIC\n");
|
|
FATAL (host);
|
|
break;
|
|
case SPECIFIC_INT_BREAK:
|
|
intr_break (host, cmd);
|
|
break;
|
|
default:
|
|
printk(KERN_ALERT "scsi%d : failure at ", host->host_no);
|
|
print_insn (host, dsp, KERN_ALERT "", 1);
|
|
printk(KERN_ALERT" dstat_sir_intr() returned unknown value %d\n",
|
|
tmp);
|
|
FATAL (host);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function : static int print_insn (struct Scsi_Host *host,
|
|
* u32 *insn, int kernel)
|
|
*
|
|
* Purpose : print numeric representation of the instruction pointed
|
|
* to by insn to the debugging or kernel message buffer
|
|
* as appropriate.
|
|
*
|
|
* If desired, a user level program can interpret this
|
|
* information.
|
|
*
|
|
* Inputs : host, insn - host, pointer to instruction, prefix -
|
|
* string to prepend, kernel - use printk instead of debugging buffer.
|
|
*
|
|
* Returns : size, in u32s, of instruction printed.
|
|
*/
|
|
|
|
/*
|
|
* FIXME: should change kernel parameter so that it takes an ENUM
|
|
* specifying severity - either KERN_ALERT or KERN_PANIC so
|
|
* all panic messages are output with the same severity.
|
|
*/
|
|
|
|
static int
|
|
print_insn (struct Scsi_Host *host, const u32 *insn,
|
|
const char *prefix, int kernel) {
|
|
char buf[160], /* Temporary buffer and pointer. ICKY
|
|
arbitrary length. */
|
|
|
|
|
|
*tmp;
|
|
unsigned char dcmd; /* dcmd register for *insn */
|
|
int size;
|
|
|
|
/*
|
|
* Check to see if the instruction pointer is not bogus before
|
|
* indirecting through it; avoiding red-zone at start of
|
|
* memory.
|
|
*
|
|
* FIXME: icky magic needs to happen here on non-intel boxes which
|
|
* don't have kernel memory mapped in like this. Might be reasonable
|
|
* to use vverify()?
|
|
*/
|
|
|
|
if (virt_to_phys((void *)insn) < PAGE_SIZE ||
|
|
virt_to_phys((void *)(insn + 8)) > virt_to_phys(high_memory) ||
|
|
((((dcmd = (insn[0] >> 24) & 0xff) & DCMD_TYPE_MMI) == DCMD_TYPE_MMI) &&
|
|
virt_to_phys((void *)(insn + 12)) > virt_to_phys(high_memory))) {
|
|
size = 0;
|
|
sprintf (buf, "%s%p: address out of range\n",
|
|
prefix, insn);
|
|
} else {
|
|
/*
|
|
* FIXME : (void *) cast in virt_to_bus should be unnecessary, because
|
|
* it should take const void * as argument.
|
|
*/
|
|
#if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000)
|
|
sprintf(buf, "%s0x%lx (virt 0x%p) : 0x%08x 0x%08x (virt 0x%p)",
|
|
(prefix ? prefix : ""), virt_to_bus((void *) insn), insn,
|
|
insn[0], insn[1], bus_to_virt (insn[1]));
|
|
#else
|
|
/* Remove virtual addresses to reduce output, as they are the same */
|
|
sprintf(buf, "%s0x%x (+%x) : 0x%08x 0x%08x",
|
|
(prefix ? prefix : ""), (u32)insn, ((u32)insn -
|
|
(u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4,
|
|
insn[0], insn[1]);
|
|
#endif
|
|
tmp = buf + strlen(buf);
|
|
if ((dcmd & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) {
|
|
#if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000)
|
|
sprintf (tmp, " 0x%08x (virt 0x%p)\n", insn[2],
|
|
bus_to_virt(insn[2]));
|
|
#else
|
|
/* Remove virtual addr to reduce output, as it is the same */
|
|
sprintf (tmp, " 0x%08x\n", insn[2]);
|
|
#endif
|
|
size = 3;
|
|
} else {
|
|
sprintf (tmp, "\n");
|
|
size = 2;
|
|
}
|
|
}
|
|
|
|
if (kernel)
|
|
printk ("%s", buf);
|
|
#ifdef NCR_DEBUG
|
|
else {
|
|
size_t len = strlen(buf);
|
|
debugger_kernel_write(host, buf, len);
|
|
}
|
|
#endif
|
|
return size;
|
|
}
|
|
|
|
/*
|
|
* Function : int NCR53c7xx_abort (Scsi_Cmnd *cmd)
|
|
*
|
|
* Purpose : Abort an errant SCSI command, doing all necessary
|
|
* cleanup of the issue_queue, running_list, shared Linux/NCR
|
|
* dsa issue and reconnect queues.
|
|
*
|
|
* Inputs : cmd - command to abort, code - entire result field
|
|
*
|
|
* Returns : 0 on success, -1 on failure.
|
|
*/
|
|
|
|
int
|
|
NCR53c7xx_abort (Scsi_Cmnd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
struct Scsi_Host *host = cmd->device->host;
|
|
struct NCR53c7x0_hostdata *hostdata = host ? (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0] : NULL;
|
|
unsigned long flags;
|
|
struct NCR53c7x0_cmd *curr, **prev;
|
|
Scsi_Cmnd *me, **last;
|
|
#if 0
|
|
static long cache_pid = -1;
|
|
#endif
|
|
|
|
|
|
if (!host) {
|
|
printk ("Bogus SCSI command pid %ld; no host structure\n",
|
|
cmd->pid);
|
|
return SCSI_ABORT_ERROR;
|
|
} else if (!hostdata) {
|
|
printk ("Bogus SCSI host %d; no hostdata\n", host->host_no);
|
|
return SCSI_ABORT_ERROR;
|
|
}
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
/*
|
|
* CHECK : I don't think that reading ISTAT will unstack any interrupts,
|
|
* since we need to write the INTF bit to clear it, and SCSI/DMA
|
|
* interrupts don't clear until we read SSTAT/SIST and DSTAT registers.
|
|
*
|
|
* See that this is the case. Appears to be correct on the 710, at least.
|
|
*
|
|
* I suspect that several of our failures may be coming from a new fatal
|
|
* interrupt (possibly due to a phase mismatch) happening after we've left
|
|
* the interrupt handler, but before the PIC has had the interrupt condition
|
|
* cleared.
|
|
*/
|
|
|
|
if (NCR53c7x0_read8(hostdata->istat) & (ISTAT_DIP|ISTAT_SIP)) {
|
|
printk ("scsi%d : dropped interrupt for command %ld\n", host->host_no,
|
|
cmd->pid);
|
|
NCR53c7x0_intr (host->irq, NULL, NULL);
|
|
return SCSI_ABORT_BUSY;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
#if 0
|
|
if (cache_pid == cmd->pid)
|
|
panic ("scsi%d : bloody fetus %d\n", host->host_no, cmd->pid);
|
|
else
|
|
cache_pid = cmd->pid;
|
|
#endif
|
|
|
|
|
|
/*
|
|
* The command could be hiding in the issue_queue. This would be very
|
|
* nice, as commands can't be moved from the high level driver's issue queue
|
|
* into the shared queue until an interrupt routine is serviced, and this
|
|
* moving is atomic.
|
|
*
|
|
* If this is the case, we don't have to worry about anything - we simply
|
|
* pull the command out of the old queue, and call it aborted.
|
|
*/
|
|
|
|
for (me = (Scsi_Cmnd *) hostdata->issue_queue,
|
|
last = (Scsi_Cmnd **) &(hostdata->issue_queue);
|
|
me && me != cmd; last = (Scsi_Cmnd **)&(me->SCp.ptr),
|
|
me = (Scsi_Cmnd *)me->SCp.ptr);
|
|
|
|
if (me) {
|
|
*last = (Scsi_Cmnd *) me->SCp.ptr;
|
|
if (me->host_scribble) {
|
|
((struct NCR53c7x0_cmd *)me->host_scribble)->next = hostdata->free;
|
|
hostdata->free = (struct NCR53c7x0_cmd *) me->host_scribble;
|
|
me->host_scribble = NULL;
|
|
}
|
|
cmd->result = DID_ABORT << 16;
|
|
cmd->scsi_done(cmd);
|
|
printk ("scsi%d : found command %ld in Linux issue queue\n",
|
|
host->host_no, me->pid);
|
|
local_irq_restore(flags);
|
|
run_process_issue_queue();
|
|
return SCSI_ABORT_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* That failing, the command could be in our list of already executing
|
|
* commands. If this is the case, drastic measures are called for.
|
|
*/
|
|
|
|
for (curr = (struct NCR53c7x0_cmd *) hostdata->running_list,
|
|
prev = (struct NCR53c7x0_cmd **) &(hostdata->running_list);
|
|
curr && curr->cmd != cmd; prev = (struct NCR53c7x0_cmd **)
|
|
&(curr->next), curr = (struct NCR53c7x0_cmd *) curr->next);
|
|
|
|
if (curr) {
|
|
if ((curr->result & 0xff) != 0xff && (curr->result & 0xff00) != 0xff00) {
|
|
cmd->result = curr->result;
|
|
if (prev)
|
|
*prev = (struct NCR53c7x0_cmd *) curr->next;
|
|
curr->next = (struct NCR53c7x0_cmd *) hostdata->free;
|
|
cmd->host_scribble = NULL;
|
|
hostdata->free = curr;
|
|
cmd->scsi_done(cmd);
|
|
printk ("scsi%d : found finished command %ld in running list\n",
|
|
host->host_no, cmd->pid);
|
|
local_irq_restore(flags);
|
|
return SCSI_ABORT_NOT_RUNNING;
|
|
} else {
|
|
printk ("scsi%d : DANGER : command running, can not abort.\n",
|
|
cmd->device->host->host_no);
|
|
local_irq_restore(flags);
|
|
return SCSI_ABORT_BUSY;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* And if we couldn't find it in any of our queues, it must have been
|
|
* a dropped interrupt.
|
|
*/
|
|
|
|
curr = (struct NCR53c7x0_cmd *) cmd->host_scribble;
|
|
if (curr) {
|
|
curr->next = hostdata->free;
|
|
hostdata->free = curr;
|
|
cmd->host_scribble = NULL;
|
|
}
|
|
|
|
if (curr == NULL || ((curr->result & 0xff00) == 0xff00) ||
|
|
((curr->result & 0xff) == 0xff)) {
|
|
printk ("scsi%d : did this command ever run?\n", host->host_no);
|
|
cmd->result = DID_ABORT << 16;
|
|
} else {
|
|
printk ("scsi%d : probably lost INTFLY, normal completion\n",
|
|
host->host_no);
|
|
cmd->result = curr->result;
|
|
/*
|
|
* FIXME : We need to add an additional flag which indicates if a
|
|
* command was ever counted as BUSY, so if we end up here we can
|
|
* decrement the busy count if and only if it is necessary.
|
|
*/
|
|
--hostdata->busy[cmd->device->id][cmd->device->lun];
|
|
}
|
|
local_irq_restore(flags);
|
|
cmd->scsi_done(cmd);
|
|
|
|
/*
|
|
* We need to run process_issue_queue since termination of this command
|
|
* may allow another queued command to execute first?
|
|
*/
|
|
return SCSI_ABORT_NOT_RUNNING;
|
|
}
|
|
|
|
/*
|
|
* Function : int NCR53c7xx_reset (Scsi_Cmnd *cmd)
|
|
*
|
|
* Purpose : perform a hard reset of the SCSI bus and NCR
|
|
* chip.
|
|
*
|
|
* Inputs : cmd - command which caused the SCSI RESET
|
|
*
|
|
* Returns : 0 on success.
|
|
*/
|
|
|
|
int
|
|
NCR53c7xx_reset (Scsi_Cmnd *cmd, unsigned int reset_flags) {
|
|
NCR53c7x0_local_declare();
|
|
unsigned long flags;
|
|
int found = 0;
|
|
struct NCR53c7x0_cmd * c;
|
|
Scsi_Cmnd *tmp;
|
|
/*
|
|
* When we call scsi_done(), it's going to wake up anything sleeping on the
|
|
* resources which were in use by the aborted commands, and we'll start to
|
|
* get new commands.
|
|
*
|
|
* We can't let this happen until after we've re-initialized the driver
|
|
* structures, and can't reinitialize those structures until after we've
|
|
* dealt with their contents.
|
|
*
|
|
* So, we need to find all of the commands which were running, stick
|
|
* them on a linked list of completed commands (we'll use the host_scribble
|
|
* pointer), do our reinitialization, and then call the done function for
|
|
* each command.
|
|
*/
|
|
Scsi_Cmnd *nuke_list = NULL;
|
|
struct Scsi_Host *host = cmd->device->host;
|
|
struct NCR53c7x0_hostdata *hostdata =
|
|
(struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
|
|
NCR53c7x0_local_setup(host);
|
|
local_irq_save(flags);
|
|
ncr_halt (host);
|
|
print_lots (host);
|
|
dump_events (host, 30);
|
|
ncr_scsi_reset (host);
|
|
for (tmp = nuke_list = return_outstanding_commands (host, 1 /* free */,
|
|
0 /* issue */ ); tmp; tmp = (Scsi_Cmnd *) tmp->SCp.buffer)
|
|
if (tmp == cmd) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If we didn't find the command which caused this reset in our running
|
|
* list, then we've lost it. See that it terminates normally anyway.
|
|
*/
|
|
if (!found) {
|
|
c = (struct NCR53c7x0_cmd *) cmd->host_scribble;
|
|
if (c) {
|
|
cmd->host_scribble = NULL;
|
|
c->next = hostdata->free;
|
|
hostdata->free = c;
|
|
} else
|
|
printk ("scsi%d: lost command %ld\n", host->host_no, cmd->pid);
|
|
cmd->SCp.buffer = (struct scatterlist *) nuke_list;
|
|
nuke_list = cmd;
|
|
}
|
|
|
|
NCR53c7x0_driver_init (host);
|
|
hostdata->soft_reset (host);
|
|
if (hostdata->resets == 0)
|
|
disable(host);
|
|
else if (hostdata->resets != -1)
|
|
--hostdata->resets;
|
|
local_irq_restore(flags);
|
|
for (; nuke_list; nuke_list = tmp) {
|
|
tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer;
|
|
nuke_list->result = DID_RESET << 16;
|
|
nuke_list->scsi_done (nuke_list);
|
|
}
|
|
local_irq_restore(flags);
|
|
return SCSI_RESET_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* The NCR SDMS bios follows Annex A of the SCSI-CAM draft, and
|
|
* therefore shares the scsicam_bios_param function.
|
|
*/
|
|
|
|
/*
|
|
* Function : int insn_to_offset (Scsi_Cmnd *cmd, u32 *insn)
|
|
*
|
|
* Purpose : convert instructions stored at NCR pointer into data
|
|
* pointer offset.
|
|
*
|
|
* Inputs : cmd - SCSI command; insn - pointer to instruction. Either current
|
|
* DSP, or saved data pointer.
|
|
*
|
|
* Returns : offset on success, -1 on failure.
|
|
*/
|
|
|
|
|
|
static int
|
|
insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) {
|
|
struct NCR53c7x0_hostdata *hostdata =
|
|
(struct NCR53c7x0_hostdata *) cmd->device->host->hostdata[0];
|
|
struct NCR53c7x0_cmd *ncmd =
|
|
(struct NCR53c7x0_cmd *) cmd->host_scribble;
|
|
int offset = 0, buffers;
|
|
struct scatterlist *segment;
|
|
char *ptr;
|
|
int found = 0;
|
|
|
|
/*
|
|
* With the current code implementation, if the insn is inside dynamically
|
|
* generated code, the data pointer will be the instruction preceding
|
|
* the next transfer segment.
|
|
*/
|
|
|
|
if (!check_address ((unsigned long) ncmd, sizeof (struct NCR53c7x0_cmd)) &&
|
|
((insn >= ncmd->data_transfer_start &&
|
|
insn < ncmd->data_transfer_end) ||
|
|
(insn >= ncmd->residual &&
|
|
insn < (ncmd->residual +
|
|
sizeof(ncmd->residual))))) {
|
|
ptr = bus_to_virt(insn[3]);
|
|
|
|
if ((buffers = cmd->use_sg)) {
|
|
for (offset = 0,
|
|
segment = (struct scatterlist *) cmd->buffer;
|
|
buffers && !((found = ((ptr >= (char *)page_address(segment->page)+segment->offset) &&
|
|
(ptr < ((char *)page_address(segment->page)+segment->offset+segment->length)))));
|
|
--buffers, offset += segment->length, ++segment)
|
|
#if 0
|
|
printk("scsi%d: comparing 0x%p to 0x%p\n",
|
|
cmd->device->host->host_no, saved, page_address(segment->page+segment->offset);
|
|
#else
|
|
;
|
|
#endif
|
|
offset += ptr - ((char *)page_address(segment->page)+segment->offset);
|
|
} else {
|
|
found = 1;
|
|
offset = ptr - (char *) (cmd->request_buffer);
|
|
}
|
|
} else if ((insn >= hostdata->script +
|
|
hostdata->E_data_transfer / sizeof(u32)) &&
|
|
(insn <= hostdata->script +
|
|
hostdata->E_end_data_transfer / sizeof(u32))) {
|
|
found = 1;
|
|
offset = 0;
|
|
}
|
|
return found ? offset : -1;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Function : void print_progress (Scsi_Cmnd *cmd)
|
|
*
|
|
* Purpose : print the current location of the saved data pointer
|
|
*
|
|
* Inputs : cmd - command we are interested in
|
|
*
|
|
*/
|
|
|
|
static void
|
|
print_progress (Scsi_Cmnd *cmd) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_cmd *ncmd =
|
|
(struct NCR53c7x0_cmd *) cmd->host_scribble;
|
|
int offset, i;
|
|
char *where;
|
|
u32 *ptr;
|
|
NCR53c7x0_local_setup (cmd->device->host);
|
|
|
|
if (check_address ((unsigned long) ncmd,sizeof (struct NCR53c7x0_cmd)) == 0)
|
|
{
|
|
printk("\nNCR53c7x0_cmd fields:\n");
|
|
printk(" bounce.len=0x%x, addr=0x%0x, buf[]=0x%02x %02x %02x %02x\n",
|
|
ncmd->bounce.len, ncmd->bounce.addr, ncmd->bounce.buf[0],
|
|
ncmd->bounce.buf[1], ncmd->bounce.buf[2], ncmd->bounce.buf[3]);
|
|
printk(" result=%04x, cdb[0]=0x%02x\n", ncmd->result, ncmd->cmnd[0]);
|
|
}
|
|
|
|
for (i = 0; i < 2; ++i) {
|
|
if (check_address ((unsigned long) ncmd,
|
|
sizeof (struct NCR53c7x0_cmd)) == -1)
|
|
continue;
|
|
if (!i) {
|
|
where = "saved";
|
|
ptr = bus_to_virt(ncmd->saved_data_pointer);
|
|
} else {
|
|
where = "active";
|
|
ptr = bus_to_virt (NCR53c7x0_read32 (DSP_REG) -
|
|
NCR53c7x0_insn_size (NCR53c7x0_read8 (DCMD_REG)) *
|
|
sizeof(u32));
|
|
}
|
|
offset = insn_to_offset (cmd, ptr);
|
|
|
|
if (offset != -1)
|
|
printk ("scsi%d : %s data pointer at offset %d\n",
|
|
cmd->device->host->host_no, where, offset);
|
|
else {
|
|
int size;
|
|
printk ("scsi%d : can't determine %s data pointer offset\n",
|
|
cmd->device->host->host_no, where);
|
|
if (ncmd) {
|
|
size = print_insn (cmd->device->host,
|
|
bus_to_virt(ncmd->saved_data_pointer), "", 1);
|
|
print_insn (cmd->device->host,
|
|
bus_to_virt(ncmd->saved_data_pointer) + size * sizeof(u32),
|
|
"", 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
print_dsa (struct Scsi_Host *host, u32 *dsa, const char *prefix) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
int i, len;
|
|
char *ptr;
|
|
Scsi_Cmnd *cmd;
|
|
|
|
if (check_address ((unsigned long) dsa, hostdata->dsa_end -
|
|
hostdata->dsa_start) == -1) {
|
|
printk("scsi%d : bad dsa virt 0x%p\n", host->host_no, dsa);
|
|
return;
|
|
}
|
|
printk("%sscsi%d : dsa at phys 0x%lx (virt 0x%p)\n"
|
|
" + %d : dsa_msgout length = %u, data = 0x%x (virt 0x%p)\n" ,
|
|
prefix ? prefix : "",
|
|
host->host_no, virt_to_bus (dsa), dsa, hostdata->dsa_msgout,
|
|
dsa[hostdata->dsa_msgout / sizeof(u32)],
|
|
dsa[hostdata->dsa_msgout / sizeof(u32) + 1],
|
|
bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1]));
|
|
|
|
/*
|
|
* Only print messages if they're sane in length so we don't
|
|
* blow the kernel printk buffer on something which won't buy us
|
|
* anything.
|
|
*/
|
|
|
|
if (dsa[hostdata->dsa_msgout / sizeof(u32)] <
|
|
sizeof (hostdata->free->select))
|
|
for (i = dsa[hostdata->dsa_msgout / sizeof(u32)],
|
|
ptr = bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1]);
|
|
i > 0 && !check_address ((unsigned long) ptr, 1);
|
|
ptr += len, i -= len) {
|
|
printk(" ");
|
|
len = scsi_print_msg (ptr);
|
|
printk("\n");
|
|
if (!len)
|
|
break;
|
|
}
|
|
|
|
printk(" + %d : select_indirect = 0x%x\n",
|
|
hostdata->dsa_select, dsa[hostdata->dsa_select / sizeof(u32)]);
|
|
cmd = (Scsi_Cmnd *) bus_to_virt(dsa[hostdata->dsa_cmnd / sizeof(u32)]);
|
|
printk(" + %d : dsa_cmnd = 0x%x ", hostdata->dsa_cmnd,
|
|
(u32) virt_to_bus(cmd));
|
|
/* XXX Maybe we should access cmd->host_scribble->result here. RGH */
|
|
if (cmd) {
|
|
printk(" result = 0x%x, target = %d, lun = %d, cmd = ",
|
|
cmd->result, cmd->device->id, cmd->device->lun);
|
|
__scsi_print_command(cmd->cmnd);
|
|
} else
|
|
printk("\n");
|
|
printk(" + %d : dsa_next = 0x%x\n", hostdata->dsa_next,
|
|
dsa[hostdata->dsa_next / sizeof(u32)]);
|
|
if (cmd) {
|
|
printk("scsi%d target %d : sxfer_sanity = 0x%x, scntl3_sanity = 0x%x\n"
|
|
" script : ",
|
|
host->host_no, cmd->device->id,
|
|
hostdata->sync[cmd->device->id].sxfer_sanity,
|
|
hostdata->sync[cmd->device->id].scntl3_sanity);
|
|
for (i = 0; i < (sizeof(hostdata->sync[cmd->device->id].script) / 4); ++i)
|
|
printk ("0x%x ", hostdata->sync[cmd->device->id].script[i]);
|
|
printk ("\n");
|
|
print_progress (cmd);
|
|
}
|
|
}
|
|
/*
|
|
* Function : void print_queues (Scsi_Host *host)
|
|
*
|
|
* Purpose : print the contents of the NCR issue and reconnect queues
|
|
*
|
|
* Inputs : host - SCSI host we are interested in
|
|
*
|
|
*/
|
|
|
|
static void
|
|
print_queues (struct Scsi_Host *host) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
u32 *dsa, *next_dsa;
|
|
volatile u32 *ncrcurrent;
|
|
int left;
|
|
Scsi_Cmnd *cmd, *next_cmd;
|
|
unsigned long flags;
|
|
|
|
printk ("scsi%d : issue queue\n", host->host_no);
|
|
|
|
for (left = host->can_queue, cmd = (Scsi_Cmnd *) hostdata->issue_queue;
|
|
left >= 0 && cmd;
|
|
cmd = next_cmd) {
|
|
next_cmd = (Scsi_Cmnd *) cmd->SCp.ptr;
|
|
local_irq_save(flags);
|
|
if (cmd->host_scribble) {
|
|
if (check_address ((unsigned long) (cmd->host_scribble),
|
|
sizeof (cmd->host_scribble)) == -1)
|
|
printk ("scsi%d: scsi pid %ld bad pointer to NCR53c7x0_cmd\n",
|
|
host->host_no, cmd->pid);
|
|
/* print_dsa does sanity check on address, no need to check */
|
|
else
|
|
print_dsa (host, ((struct NCR53c7x0_cmd *) cmd->host_scribble)
|
|
-> dsa, "");
|
|
} else
|
|
printk ("scsi%d : scsi pid %ld for target %d lun %d has no NCR53c7x0_cmd\n",
|
|
host->host_no, cmd->pid, cmd->device->id, cmd->device->lun);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
if (left <= 0) {
|
|
printk ("scsi%d : loop detected in issue queue\n",
|
|
host->host_no);
|
|
}
|
|
|
|
/*
|
|
* Traverse the NCR reconnect and start DSA structures, printing out
|
|
* each element until we hit the end or detect a loop. Currently,
|
|
* the reconnect structure is a linked list; and the start structure
|
|
* is an array. Eventually, the reconnect structure will become a
|
|
* list as well, since this simplifies the code.
|
|
*/
|
|
|
|
printk ("scsi%d : schedule dsa array :\n", host->host_no);
|
|
for (left = host->can_queue, ncrcurrent = hostdata->schedule;
|
|
left > 0; ncrcurrent += 2, --left)
|
|
if (ncrcurrent[0] != hostdata->NOP_insn)
|
|
/* FIXME : convert pointer to dsa_begin to pointer to dsa. */
|
|
print_dsa (host, bus_to_virt (ncrcurrent[1] -
|
|
(hostdata->E_dsa_code_begin -
|
|
hostdata->E_dsa_code_template)), "");
|
|
printk ("scsi%d : end schedule dsa array\n", host->host_no);
|
|
|
|
printk ("scsi%d : reconnect_dsa_head :\n", host->host_no);
|
|
|
|
for (left = host->can_queue,
|
|
dsa = bus_to_virt (hostdata->reconnect_dsa_head);
|
|
left >= 0 && dsa;
|
|
dsa = next_dsa) {
|
|
local_irq_save(flags);
|
|
if (check_address ((unsigned long) dsa, sizeof(dsa)) == -1) {
|
|
printk ("scsi%d: bad DSA pointer 0x%p", host->host_no,
|
|
dsa);
|
|
next_dsa = NULL;
|
|
}
|
|
else
|
|
{
|
|
next_dsa = bus_to_virt(dsa[hostdata->dsa_next / sizeof(u32)]);
|
|
print_dsa (host, dsa, "");
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
printk ("scsi%d : end reconnect_dsa_head\n", host->host_no);
|
|
if (left < 0)
|
|
printk("scsi%d: possible loop in ncr reconnect list\n",
|
|
host->host_no);
|
|
}
|
|
|
|
static void
|
|
print_lots (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
struct NCR53c7x0_hostdata *hostdata =
|
|
(struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
u32 *dsp_next, *dsp, *dsa, dbc_dcmd;
|
|
unsigned char dcmd, sbcl;
|
|
int i, size;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
if ((dsp_next = bus_to_virt(NCR53c7x0_read32 (DSP_REG)))) {
|
|
dbc_dcmd = NCR53c7x0_read32(DBC_REG);
|
|
dcmd = (dbc_dcmd & 0xff000000) >> 24;
|
|
dsp = dsp_next - NCR53c7x0_insn_size(dcmd);
|
|
dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
|
|
sbcl = NCR53c7x0_read8 (SBCL_REG);
|
|
|
|
/*
|
|
* For the 53c710, the following will report value 0 for SCNTL3
|
|
* and STEST0 - we don't have these registers.
|
|
*/
|
|
printk ("scsi%d : DCMD|DBC=0x%x, DNAD=0x%x (virt 0x%p)\n"
|
|
" DSA=0x%lx (virt 0x%p)\n"
|
|
" DSPS=0x%x, TEMP=0x%x (virt 0x%p), DMODE=0x%x\n"
|
|
" SXFER=0x%x, SCNTL3=0x%x\n"
|
|
" %s%s%sphase=%s, %d bytes in SCSI FIFO\n"
|
|
" SCRATCH=0x%x, saved2_dsa=0x%0lx\n",
|
|
host->host_no, dbc_dcmd, NCR53c7x0_read32(DNAD_REG),
|
|
bus_to_virt(NCR53c7x0_read32(DNAD_REG)),
|
|
virt_to_bus(dsa), dsa,
|
|
NCR53c7x0_read32(DSPS_REG), NCR53c7x0_read32(TEMP_REG),
|
|
bus_to_virt (NCR53c7x0_read32(TEMP_REG)),
|
|
(int) NCR53c7x0_read8(hostdata->dmode),
|
|
(int) NCR53c7x0_read8(SXFER_REG),
|
|
((hostdata->chip / 100) == 8) ?
|
|
(int) NCR53c7x0_read8(SCNTL3_REG_800) : 0,
|
|
(sbcl & SBCL_BSY) ? "BSY " : "",
|
|
(sbcl & SBCL_SEL) ? "SEL " : "",
|
|
(sbcl & SBCL_REQ) ? "REQ " : "",
|
|
sstat2_to_phase(NCR53c7x0_read8 (((hostdata->chip / 100) == 8) ?
|
|
SSTAT1_REG : SSTAT2_REG)),
|
|
(NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ?
|
|
SSTAT1_REG : SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT,
|
|
((hostdata->chip / 100) == 8) ? NCR53c7x0_read8 (STEST0_REG_800) :
|
|
NCR53c7x0_read32(SCRATCHA_REG_800),
|
|
hostdata->saved2_dsa);
|
|
printk ("scsi%d : DSP 0x%lx (virt 0x%p) ->\n", host->host_no,
|
|
virt_to_bus(dsp), dsp);
|
|
for (i = 6; i > 0; --i, dsp += size)
|
|
size = print_insn (host, dsp, "", 1);
|
|
if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) {
|
|
if ((hostdata->chip / 100) == 8)
|
|
printk ("scsi%d : connected (SDID=0x%x, SSID=0x%x)\n",
|
|
host->host_no, NCR53c7x0_read8 (SDID_REG_800),
|
|
NCR53c7x0_read8 (SSID_REG_800));
|
|
else
|
|
printk ("scsi%d : connected (SDID=0x%x)\n",
|
|
host->host_no, NCR53c7x0_read8 (SDID_REG_700));
|
|
print_dsa (host, dsa, "");
|
|
}
|
|
|
|
#if 1
|
|
print_queues (host);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function : static int shutdown (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : does a clean (we hope) shutdown of the NCR SCSI
|
|
* chip. Use prior to dumping core, unloading the NCR driver,
|
|
*
|
|
* Returns : 0 on success
|
|
*/
|
|
static int
|
|
shutdown (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
unsigned long flags;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
NCR53c7x0_local_setup(host);
|
|
local_irq_save(flags);
|
|
/* Get in a state where we can reset the SCSI bus */
|
|
ncr_halt (host);
|
|
ncr_scsi_reset (host);
|
|
hostdata->soft_reset(host);
|
|
|
|
disable (host);
|
|
local_irq_restore(flags);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function : void ncr_scsi_reset (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : reset the SCSI bus.
|
|
*/
|
|
|
|
static void
|
|
ncr_scsi_reset (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
unsigned long flags;
|
|
NCR53c7x0_local_setup(host);
|
|
local_irq_save(flags);
|
|
NCR53c7x0_write8(SCNTL1_REG, SCNTL1_RST);
|
|
udelay(25); /* Minimum amount of time to assert RST */
|
|
NCR53c7x0_write8(SCNTL1_REG, 0);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
/*
|
|
* Function : void hard_reset (struct Scsi_Host *host)
|
|
*
|
|
*/
|
|
|
|
static void
|
|
hard_reset (struct Scsi_Host *host) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
unsigned long flags;
|
|
local_irq_save(flags);
|
|
ncr_scsi_reset(host);
|
|
NCR53c7x0_driver_init (host);
|
|
if (hostdata->soft_reset)
|
|
hostdata->soft_reset (host);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function : Scsi_Cmnd *return_outstanding_commands (struct Scsi_Host *host,
|
|
* int free, int issue)
|
|
*
|
|
* Purpose : return a linked list (using the SCp.buffer field as next,
|
|
* so we don't perturb hostdata. We don't use a field of the
|
|
* NCR53c7x0_cmd structure since we may not have allocated one
|
|
* for the command causing the reset.) of Scsi_Cmnd structures that
|
|
* had propagated below the Linux issue queue level. If free is set,
|
|
* free the NCR53c7x0_cmd structures which are associated with
|
|
* the Scsi_Cmnd structures, and clean up any internal
|
|
* NCR lists that the commands were on. If issue is set,
|
|
* also return commands in the issue queue.
|
|
*
|
|
* Returns : linked list of commands
|
|
*
|
|
* NOTE : the caller should insure that the NCR chip is halted
|
|
* if the free flag is set.
|
|
*/
|
|
|
|
static Scsi_Cmnd *
|
|
return_outstanding_commands (struct Scsi_Host *host, int free, int issue) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
struct NCR53c7x0_cmd *c;
|
|
int i;
|
|
u32 *ncrcurrent;
|
|
Scsi_Cmnd *list = NULL, *tmp;
|
|
for (c = (struct NCR53c7x0_cmd *) hostdata->running_list; c;
|
|
c = (struct NCR53c7x0_cmd *) c->next) {
|
|
if (c->cmd->SCp.buffer) {
|
|
printk ("scsi%d : loop detected in running list!\n", host->host_no);
|
|
break;
|
|
} else {
|
|
printk ("Duh? Bad things happening in the NCR driver\n");
|
|
break;
|
|
}
|
|
|
|
c->cmd->SCp.buffer = (struct scatterlist *) list;
|
|
list = c->cmd;
|
|
if (free) {
|
|
c->next = hostdata->free;
|
|
hostdata->free = c;
|
|
}
|
|
}
|
|
|
|
if (free) {
|
|
for (i = 0, ncrcurrent = (u32 *) hostdata->schedule;
|
|
i < host->can_queue; ++i, ncrcurrent += 2) {
|
|
ncrcurrent[0] = hostdata->NOP_insn;
|
|
ncrcurrent[1] = 0xdeadbeef;
|
|
}
|
|
hostdata->ncrcurrent = NULL;
|
|
}
|
|
|
|
if (issue) {
|
|
for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp; tmp = tmp->next) {
|
|
if (tmp->SCp.buffer) {
|
|
printk ("scsi%d : loop detected in issue queue!\n",
|
|
host->host_no);
|
|
break;
|
|
}
|
|
tmp->SCp.buffer = (struct scatterlist *) list;
|
|
list = tmp;
|
|
}
|
|
if (free)
|
|
hostdata->issue_queue = NULL;
|
|
|
|
}
|
|
return list;
|
|
}
|
|
|
|
/*
|
|
* Function : static int disable (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : disables the given NCR host, causing all commands
|
|
* to return a driver error. Call this so we can unload the
|
|
* module during development and try again. Eventually,
|
|
* we should be able to find clean workarounds for these
|
|
* problems.
|
|
*
|
|
* Inputs : host - hostadapter to twiddle
|
|
*
|
|
* Returns : 0 on success.
|
|
*/
|
|
|
|
static int
|
|
disable (struct Scsi_Host *host) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
unsigned long flags;
|
|
Scsi_Cmnd *nuke_list, *tmp;
|
|
local_irq_save(flags);
|
|
if (hostdata->state != STATE_HALTED)
|
|
ncr_halt (host);
|
|
nuke_list = return_outstanding_commands (host, 1 /* free */, 1 /* issue */);
|
|
hard_reset (host);
|
|
hostdata->state = STATE_DISABLED;
|
|
local_irq_restore(flags);
|
|
printk ("scsi%d : nuking commands\n", host->host_no);
|
|
for (; nuke_list; nuke_list = tmp) {
|
|
tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer;
|
|
nuke_list->result = DID_ERROR << 16;
|
|
nuke_list->scsi_done(nuke_list);
|
|
}
|
|
printk ("scsi%d : done. \n", host->host_no);
|
|
printk (KERN_ALERT "scsi%d : disabled. Unload and reload\n",
|
|
host->host_no);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function : static int ncr_halt (struct Scsi_Host *host)
|
|
*
|
|
* Purpose : halts the SCSI SCRIPTS(tm) processor on the NCR chip
|
|
*
|
|
* Inputs : host - SCSI chip to halt
|
|
*
|
|
* Returns : 0 on success
|
|
*/
|
|
|
|
static int
|
|
ncr_halt (struct Scsi_Host *host) {
|
|
NCR53c7x0_local_declare();
|
|
unsigned long flags;
|
|
unsigned char istat, tmp;
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
int stage;
|
|
NCR53c7x0_local_setup(host);
|
|
|
|
local_irq_save(flags);
|
|
/* Stage 0 : eat all interrupts
|
|
Stage 1 : set ABORT
|
|
Stage 2 : eat all but abort interrupts
|
|
Stage 3 : eat all interrupts
|
|
*/
|
|
for (stage = 0;;) {
|
|
if (stage == 1) {
|
|
NCR53c7x0_write8(hostdata->istat, ISTAT_ABRT);
|
|
++stage;
|
|
}
|
|
istat = NCR53c7x0_read8 (hostdata->istat);
|
|
if (istat & ISTAT_SIP) {
|
|
tmp = NCR53c7x0_read8(SSTAT0_REG);
|
|
} else if (istat & ISTAT_DIP) {
|
|
tmp = NCR53c7x0_read8(DSTAT_REG);
|
|
if (stage == 2) {
|
|
if (tmp & DSTAT_ABRT) {
|
|
NCR53c7x0_write8(hostdata->istat, 0);
|
|
++stage;
|
|
} else {
|
|
printk(KERN_ALERT "scsi%d : could not halt NCR chip\n",
|
|
host->host_no);
|
|
disable (host);
|
|
}
|
|
}
|
|
}
|
|
if (!(istat & (ISTAT_SIP|ISTAT_DIP))) {
|
|
if (stage == 0)
|
|
++stage;
|
|
else if (stage == 3)
|
|
break;
|
|
}
|
|
}
|
|
hostdata->state = STATE_HALTED;
|
|
local_irq_restore(flags);
|
|
#if 0
|
|
print_lots (host);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function: event_name (int event)
|
|
*
|
|
* Purpose: map event enum into user-readable strings.
|
|
*/
|
|
|
|
static const char *
|
|
event_name (int event) {
|
|
switch (event) {
|
|
case EVENT_NONE: return "none";
|
|
case EVENT_ISSUE_QUEUE: return "to issue queue";
|
|
case EVENT_START_QUEUE: return "to start queue";
|
|
case EVENT_SELECT: return "selected";
|
|
case EVENT_DISCONNECT: return "disconnected";
|
|
case EVENT_RESELECT: return "reselected";
|
|
case EVENT_COMPLETE: return "completed";
|
|
case EVENT_IDLE: return "idle";
|
|
case EVENT_SELECT_FAILED: return "select failed";
|
|
case EVENT_BEFORE_SELECT: return "before select";
|
|
case EVENT_RESELECT_FAILED: return "reselect failed";
|
|
default: return "unknown";
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function : void dump_events (struct Scsi_Host *host, count)
|
|
*
|
|
* Purpose : print last count events which have occurred.
|
|
*/
|
|
static void
|
|
dump_events (struct Scsi_Host *host, int count) {
|
|
struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
|
|
host->hostdata[0];
|
|
struct NCR53c7x0_event event;
|
|
int i;
|
|
unsigned long flags;
|
|
if (hostdata->events) {
|
|
if (count > hostdata->event_size)
|
|
count = hostdata->event_size;
|
|
for (i = hostdata->event_index; count > 0;
|
|
i = (i ? i - 1 : hostdata->event_size -1), --count) {
|
|
/*
|
|
* By copying the event we're currently examining with interrupts
|
|
* disabled, we can do multiple printk(), etc. operations and
|
|
* still be guaranteed that they're happening on the same
|
|
* event structure.
|
|
*/
|
|
local_irq_save(flags);
|
|
#if 0
|
|
event = hostdata->events[i];
|
|
#else
|
|
memcpy ((void *) &event, (void *) &(hostdata->events[i]),
|
|
sizeof(event));
|
|
#endif
|
|
|
|
local_irq_restore(flags);
|
|
printk ("scsi%d : %s event %d at %ld secs %ld usecs target %d lun %d\n",
|
|
host->host_no, event_name (event.event), count,
|
|
(long) event.time.tv_sec, (long) event.time.tv_usec,
|
|
event.target, event.lun);
|
|
if (event.dsa)
|
|
printk (" event for dsa 0x%lx (virt 0x%p)\n",
|
|
virt_to_bus(event.dsa), event.dsa);
|
|
if (event.pid != -1) {
|
|
printk (" event for pid %ld ", event.pid);
|
|
__scsi_print_command (event.cmnd);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function: check_address
|
|
*
|
|
* Purpose: Check to see if a possibly corrupt pointer will fault the
|
|
* kernel.
|
|
*
|
|
* Inputs: addr - address; size - size of area
|
|
*
|
|
* Returns: 0 if area is OK, -1 on error.
|
|
*
|
|
* NOTES: should be implemented in terms of vverify on kernels
|
|
* that have it.
|
|
*/
|
|
|
|
static int
|
|
check_address (unsigned long addr, int size) {
|
|
return (virt_to_phys((void *)addr) < PAGE_SIZE || virt_to_phys((void *)(addr + size)) > virt_to_phys(high_memory) ? -1 : 0);
|
|
}
|
|
|
|
#ifdef MODULE
|
|
int
|
|
NCR53c7x0_release(struct Scsi_Host *host) {
|
|
struct NCR53c7x0_hostdata *hostdata =
|
|
(struct NCR53c7x0_hostdata *) host->hostdata[0];
|
|
struct NCR53c7x0_cmd *cmd, *tmp;
|
|
shutdown (host);
|
|
if (host->irq != SCSI_IRQ_NONE)
|
|
{
|
|
int irq_count;
|
|
struct Scsi_Host *tmp;
|
|
for (irq_count = 0, tmp = first_host; tmp; tmp = tmp->next)
|
|
if (tmp->hostt == the_template && tmp->irq == host->irq)
|
|
++irq_count;
|
|
if (irq_count == 1)
|
|
free_irq(host->irq, NULL);
|
|
}
|
|
if (host->dma_channel != DMA_NONE)
|
|
free_dma(host->dma_channel);
|
|
if (host->io_port)
|
|
release_region(host->io_port, host->n_io_port);
|
|
|
|
for (cmd = (struct NCR53c7x0_cmd *) hostdata->free; cmd; cmd = tmp,
|
|
--hostdata->num_cmds) {
|
|
tmp = (struct NCR53c7x0_cmd *) cmd->next;
|
|
/*
|
|
* If we're going to loop, try to stop it to get a more accurate
|
|
* count of the leaked commands.
|
|
*/
|
|
cmd->next = NULL;
|
|
if (cmd->free)
|
|
cmd->free ((void *) cmd->real, cmd->size);
|
|
}
|
|
if (hostdata->num_cmds)
|
|
printk ("scsi%d : leaked %d NCR53c7x0_cmd structures\n",
|
|
host->host_no, hostdata->num_cmds);
|
|
if (hostdata->events)
|
|
vfree ((void *)hostdata->events);
|
|
|
|
/* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which
|
|
* XXX may be invalid (CONFIG_060_WRITETHROUGH)
|
|
*/
|
|
kernel_set_cachemode((void *)hostdata, 8192, IOMAP_FULL_CACHING);
|
|
free_pages ((u32)hostdata, 1);
|
|
return 1;
|
|
}
|
|
#endif /* def MODULE */
|
|
|