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Stefan Richter 850bb6f23b firewire: cdev: add PHY packet transmission ... Add an FW_CDEV_IOC_SEND_PHY_PACKET ioctl() for /dev/fw* which can be used to implement bus management related functionality in userspace. This is also half of the functionality (the transmit part) that is needed to support a userspace implementation of a VersaPHY transaction layer. Safety considerations: - PHY packets are generally broadcasts and may have interesting effects on PHYs and the bus, e.g. make asynchronous arbitration impossible due to too low gap count. Hence some kind of elevated privileges should be required of a process to be able to send PHY packets. This implementation assumes that a process that is allowed to open the /dev/fw* of a local node does have this privilege. There was an inconclusive discussion about introducing POSIX capabilities as a means to check for user privileges for these kinds of operations. - The kernel does not check integrity of the supplied packet data. That would be far too much code, considering the many kinds of PHY packets. A process which got the privilege to send these packets is trusted to do it correctly. Just like with the other "send packet" ioctls, a non-blocking API is chosen; i.e. the ioctl may return even before AT DMA started. After transmission, an event for poll()/read() is enqueued. Most users are going to need a blocking API, but a blocking userspace wrapper is easy to implement, and the second of the two existing libraw1394 calls raw1394_phy_packet_write() and raw1394_start_phy_packet_write() can be better supported that way. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>		15 years ago
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Kconfig	firewire, ieee1394: update Kconfig help	15 years ago
Makefile	firewire: net: add Kconfig item, rename driver	16 years ago
core-card.c	firewire: normalize status values in packet callbacks	15 years ago
core-cdev.c	firewire: cdev: add PHY packet transmission	15 years ago
core-device.c	firewire: cdev: fix fw_cdev_event_bus_reset emission after local config ROM changes	15 years ago
core-iso.c	firewire: core: fix fw_send_request kerneldoc comment	15 years ago
core-topology.c	firewire: core: fix fw_send_request kerneldoc comment	15 years ago
core-transaction.c	firewire: normalize status values in packet callbacks	15 years ago
core.h	firewire: core: integrate software-forced bus resets with bus management	15 years ago
net.c	firewire: remove an unused function argument	15 years ago
ohci.c	firewire: core: integrate software-forced bus resets with bus management	15 years ago
ohci.h	firewire: add CSR cmstr support	15 years ago
sbp2.c	firewire: remove an unused function argument	15 years ago