You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
kernel_samsung_sm7125/drivers/net/ethernet/intel/e1000e/e1000.h

612 lines
18 KiB

/* Intel PRO/1000 Linux driver
* Copyright(c) 1999 - 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* Linux NICS <linux.nics@intel.com>
* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*/
/* Linux PRO/1000 Ethernet Driver main header file */
#ifndef _E1000_H_
#define _E1000_H_
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/io.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/pci-aspm.h>
#include <linux/crc32.h>
#include <linux/if_vlan.h>
#include <linux/timecounter.h>
#include <linux/net_tstamp.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/ptp_classify.h>
#include <linux/mii.h>
#include <linux/mdio.h>
#include <linux/pm_qos.h>
#include "hw.h"
struct e1000_info;
#define e_dbg(format, arg...) \
netdev_dbg(hw->adapter->netdev, format, ## arg)
#define e_err(format, arg...) \
netdev_err(adapter->netdev, format, ## arg)
#define e_info(format, arg...) \
netdev_info(adapter->netdev, format, ## arg)
#define e_warn(format, arg...) \
netdev_warn(adapter->netdev, format, ## arg)
#define e_notice(format, arg...) \
netdev_notice(adapter->netdev, format, ## arg)
/* Interrupt modes, as used by the IntMode parameter */
#define E1000E_INT_MODE_LEGACY 0
#define E1000E_INT_MODE_MSI 1
#define E1000E_INT_MODE_MSIX 2
/* Tx/Rx descriptor defines */
#define E1000_DEFAULT_TXD 256
#define E1000_MAX_TXD 4096
#define E1000_MIN_TXD 64
#define E1000_DEFAULT_RXD 256
#define E1000_MAX_RXD 4096
#define E1000_MIN_RXD 64
#define E1000_MIN_ITR_USECS 10 /* 100000 irq/sec */
#define E1000_MAX_ITR_USECS 10000 /* 100 irq/sec */
#define E1000_FC_PAUSE_TIME 0x0680 /* 858 usec */
/* How many Tx Descriptors do we need to call netif_wake_queue ? */
/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define E1000_RX_BUFFER_WRITE 16 /* Must be power of 2 */
#define AUTO_ALL_MODES 0
#define E1000_EEPROM_APME 0x0400
#define E1000_MNG_VLAN_NONE (-1)
#define DEFAULT_JUMBO 9234
/* Time to wait before putting the device into D3 if there's no link (in ms). */
#define LINK_TIMEOUT 100
/* Count for polling __E1000_RESET condition every 10-20msec.
* Experimentation has shown the reset can take approximately 210msec.
*/
#define E1000_CHECK_RESET_COUNT 25
#define DEFAULT_RDTR 0
#define DEFAULT_RADV 8
#define BURST_RDTR 0x20
#define BURST_RADV 0x20
#define PCICFG_DESC_RING_STATUS 0xe4
#define FLUSH_DESC_REQUIRED 0x100
/* in the case of WTHRESH, it appears at least the 82571/2 hardware
* writes back 4 descriptors when WTHRESH=5, and 3 descriptors when
12 years ago
* WTHRESH=4, so a setting of 5 gives the most efficient bus
* utilization but to avoid possible Tx stalls, set it to 1
*/
#define E1000_TXDCTL_DMA_BURST_ENABLE \
(E1000_TXDCTL_GRAN | /* set descriptor granularity */ \
E1000_TXDCTL_COUNT_DESC | \
(1u << 16) | /* wthresh must be +1 more than desired */\
(1u << 8) | /* hthresh */ \
0x1f) /* pthresh */
#define E1000_RXDCTL_DMA_BURST_ENABLE \
(0x01000000 | /* set descriptor granularity */ \
(4u << 16) | /* set writeback threshold */ \
(4u << 8) | /* set prefetch threshold */ \
0x20) /* set hthresh */
#define E1000_TIDV_FPD BIT(31)
#define E1000_RDTR_FPD BIT(31)
enum e1000_boards {
board_82571,
board_82572,
board_82573,
board_82574,
board_82583,
board_80003es2lan,
board_ich8lan,
board_ich9lan,
board_ich10lan,
board_pchlan,
board_pch2lan,
board_pch_lpt,
board_pch_spt,
board_pch_cnp
};
struct e1000_ps_page {
struct page *page;
u64 dma; /* must be u64 - written to hw */
};
/* wrappers around a pointer to a socket buffer,
* so a DMA handle can be stored along with the buffer
*/
struct e1000_buffer {
dma_addr_t dma;
struct sk_buff *skb;
union {
/* Tx */
struct {
unsigned long time_stamp;
u16 length;
u16 next_to_watch;
unsigned int segs;
unsigned int bytecount;
u16 mapped_as_page;
};
/* Rx */
struct {
/* arrays of page information for packet split */
struct e1000_ps_page *ps_pages;
struct page *page;
};
};
};
struct e1000_ring {
struct e1000_adapter *adapter; /* back pointer to adapter */
void *desc; /* pointer to ring memory */
dma_addr_t dma; /* phys address of ring */
unsigned int size; /* length of ring in bytes */
unsigned int count; /* number of desc. in ring */
u16 next_to_use;
u16 next_to_clean;
void __iomem *head;
void __iomem *tail;
/* array of buffer information structs */
struct e1000_buffer *buffer_info;
char name[IFNAMSIZ + 5];
u32 ims_val;
u32 itr_val;
void __iomem *itr_register;
int set_itr;
struct sk_buff *rx_skb_top;
};
/* PHY register snapshot values */
struct e1000_phy_regs {
u16 bmcr; /* basic mode control register */
u16 bmsr; /* basic mode status register */
u16 advertise; /* auto-negotiation advertisement */
u16 lpa; /* link partner ability register */
u16 expansion; /* auto-negotiation expansion reg */
u16 ctrl1000; /* 1000BASE-T control register */
u16 stat1000; /* 1000BASE-T status register */
u16 estatus; /* extended status register */
};
/* board specific private data structure */
struct e1000_adapter {
struct timer_list watchdog_timer;
struct timer_list phy_info_timer;
struct timer_list blink_timer;
struct work_struct reset_task;
struct work_struct watchdog_task;
const struct e1000_info *ei;
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
u32 bd_number;
u32 rx_buffer_len;
u16 mng_vlan_id;
u16 link_speed;
u16 link_duplex;
u16 eeprom_vers;
/* track device up/down/testing state */
unsigned long state;
/* Interrupt Throttle Rate */
u32 itr;
u32 itr_setting;
u16 tx_itr;
u16 rx_itr;
/* Tx - one ring per active queue */
struct e1000_ring *tx_ring ____cacheline_aligned_in_smp;
e1000e: DoS while TSO enabled caused by link partner with small MSS With a low enough MSS on the link partner and TSO enabled locally, the networking stack can periodically send a very large (e.g. 64KB) TCP message for which the driver will attempt to use more Tx descriptors than are available by default in the Tx ring. This is due to a workaround in the code that imposes a limit of only 4 MSS-sized segments per descriptor which appears to be a carry-over from the older e1000 driver and may be applicable only to some older PCI or PCIx parts which are not supported in e1000e. When the driver gets a message that is too large to fit across the configured number of Tx descriptors, it stops the upper stack from queueing any more and gets stuck in this state. After a timeout, the upper stack assumes the adapter is hung and calls the driver to reset it. Remove the unnecessary limitation of using up to only 4 MSS-sized segments per Tx descriptor, and put in a hard failure test to catch when attempting to check for message sizes larger than would fit in the whole Tx ring. Refactor the remaining logic that limits the size of data per Tx descriptor from a seemingly arbitrary 8KB to a limit based on the dynamic size of the Tx packet buffer as described in the hardware specification. Also, fix the logic in the check for space in the Tx ring for the next largest possible packet after the current one has been successfully queued for transmit, and use the appropriate defines for default ring sizes in e1000_probe instead of magic values. This issue goes back to the introduction of e1000e in 2.6.24 when it was split off from e1000. Reported-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Cc: Stable <stable@vger.kernel.org> [2.6.24+] Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
13 years ago
u32 tx_fifo_limit;
struct napi_struct napi;
unsigned int uncorr_errors; /* uncorrectable ECC errors */
unsigned int corr_errors; /* correctable ECC errors */
unsigned int restart_queue;
u32 txd_cmd;
bool detect_tx_hung;
bool tx_hang_recheck;
u8 tx_timeout_factor;
u32 tx_int_delay;
u32 tx_abs_int_delay;
unsigned int total_tx_bytes;
unsigned int total_tx_packets;
unsigned int total_rx_bytes;
unsigned int total_rx_packets;
/* Tx stats */
u64 tpt_old;
u64 colc_old;
u32 gotc;
u64 gotc_old;
u32 tx_timeout_count;
u32 tx_fifo_head;
u32 tx_head_addr;
u32 tx_fifo_size;
u32 tx_dma_failed;
u32 tx_hwtstamp_timeouts;
u32 tx_hwtstamp_skipped;
/* Rx */
bool (*clean_rx)(struct e1000_ring *ring, int *work_done,
int work_to_do) ____cacheline_aligned_in_smp;
void (*alloc_rx_buf)(struct e1000_ring *ring, int cleaned_count,
gfp_t gfp);
struct e1000_ring *rx_ring;
u32 rx_int_delay;
u32 rx_abs_int_delay;
/* Rx stats */
u64 hw_csum_err;
u64 hw_csum_good;
u64 rx_hdr_split;
u32 gorc;
u64 gorc_old;
u32 alloc_rx_buff_failed;
u32 rx_dma_failed;
u32 rx_hwtstamp_cleared;
unsigned int rx_ps_pages;
u16 rx_ps_bsize0;
u32 max_frame_size;
u32 min_frame_size;
/* OS defined structs */
struct net_device *netdev;
struct pci_dev *pdev;
/* structs defined in e1000_hw.h */
struct e1000_hw hw;
spinlock_t stats64_lock; /* protects statistics counters */
struct e1000_hw_stats stats;
struct e1000_phy_info phy_info;
struct e1000_phy_stats phy_stats;
/* Snapshot of PHY registers */
struct e1000_phy_regs phy_regs;
struct e1000_ring test_tx_ring;
struct e1000_ring test_rx_ring;
u32 test_icr;
u32 msg_enable;
unsigned int num_vectors;
struct msix_entry *msix_entries;
int int_mode;
u32 eiac_mask;
u32 eeprom_wol;
u32 wol;
u32 pba;
u32 max_hw_frame_size;
bool fc_autoneg;
unsigned int flags;
unsigned int flags2;
struct work_struct downshift_task;
struct work_struct update_phy_task;
struct work_struct print_hang_task;
int phy_hang_count;
u16 tx_ring_count;
u16 rx_ring_count;
struct hwtstamp_config hwtstamp_config;
struct delayed_work systim_overflow_work;
struct sk_buff *tx_hwtstamp_skb;
unsigned long tx_hwtstamp_start;
struct work_struct tx_hwtstamp_work;
spinlock_t systim_lock; /* protects SYSTIML/H regsters */
struct cyclecounter cc;
struct timecounter tc;
struct ptp_clock *ptp_clock;
struct ptp_clock_info ptp_clock_info;
struct pm_qos_request pm_qos_req;
9 years ago
s32 ptp_delta;
u16 eee_advert;
};
struct e1000_info {
enum e1000_mac_type mac;
unsigned int flags;
unsigned int flags2;
u32 pba;
u32 max_hw_frame_size;
s32 (*get_variants)(struct e1000_adapter *);
const struct e1000_mac_operations *mac_ops;
const struct e1000_phy_operations *phy_ops;
const struct e1000_nvm_operations *nvm_ops;
};
s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca);
/* The system time is maintained by a 64-bit counter comprised of the 32-bit
* SYSTIMH and SYSTIML registers. How the counter increments (and therefore
* its resolution) is based on the contents of the TIMINCA register - it
* increments every incperiod (bits 31:24) clock ticks by incvalue (bits 23:0).
* For the best accuracy, the incperiod should be as small as possible. The
* incvalue is scaled by a factor as large as possible (while still fitting
* in bits 23:0) so that relatively small clock corrections can be made.
*
* As a result, a shift of INCVALUE_SHIFT_n is used to fit a value of
* INCVALUE_n into the TIMINCA register allowing 32+8+(24-INCVALUE_SHIFT_n)
* bits to count nanoseconds leaving the rest for fractional nonseconds.
*/
#define INCVALUE_96MHZ 125
#define INCVALUE_SHIFT_96MHZ 17
#define INCPERIOD_SHIFT_96MHZ 2
#define INCPERIOD_96MHZ (12 >> INCPERIOD_SHIFT_96MHZ)
#define INCVALUE_25MHZ 40
#define INCVALUE_SHIFT_25MHZ 18
#define INCPERIOD_25MHZ 1
#define INCVALUE_24MHZ 125
#define INCVALUE_SHIFT_24MHZ 14
#define INCPERIOD_24MHZ 3
#define INCVALUE_38400KHZ 26
#define INCVALUE_SHIFT_38400KHZ 19
#define INCPERIOD_38400KHZ 1
/* Another drawback of scaling the incvalue by a large factor is the
* 64-bit SYSTIM register overflows more quickly. This is dealt with
* by simply reading the clock before it overflows.
*
* Clock ns bits Overflows after
* ~~~~~~ ~~~~~~~ ~~~~~~~~~~~~~~~
* 96MHz 47-bit 2^(47-INCPERIOD_SHIFT_96MHz) / 10^9 / 3600 = 9.77 hrs
* 25MHz 46-bit 2^46 / 10^9 / 3600 = 19.55 hours
*/
#define E1000_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 60 * 4)
#define E1000_MAX_82574_SYSTIM_REREADS 50
#define E1000_82574_SYSTIM_EPSILON (1ULL << 35ULL)
/* hardware capability, feature, and workaround flags */
#define FLAG_HAS_AMT BIT(0)
#define FLAG_HAS_FLASH BIT(1)
#define FLAG_HAS_HW_VLAN_FILTER BIT(2)
#define FLAG_HAS_WOL BIT(3)
/* reserved BIT(4) */
#define FLAG_HAS_CTRLEXT_ON_LOAD BIT(5)
#define FLAG_HAS_SWSM_ON_LOAD BIT(6)
#define FLAG_HAS_JUMBO_FRAMES BIT(7)
#define FLAG_READ_ONLY_NVM BIT(8)
#define FLAG_IS_ICH BIT(9)
#define FLAG_HAS_MSIX BIT(10)
#define FLAG_HAS_SMART_POWER_DOWN BIT(11)
#define FLAG_IS_QUAD_PORT_A BIT(12)
#define FLAG_IS_QUAD_PORT BIT(13)
#define FLAG_HAS_HW_TIMESTAMP BIT(14)
#define FLAG_APME_IN_WUC BIT(15)
#define FLAG_APME_IN_CTRL3 BIT(16)
#define FLAG_APME_CHECK_PORT_B BIT(17)
#define FLAG_DISABLE_FC_PAUSE_TIME BIT(18)
#define FLAG_NO_WAKE_UCAST BIT(19)
#define FLAG_MNG_PT_ENABLED BIT(20)
#define FLAG_RESET_OVERWRITES_LAA BIT(21)
#define FLAG_TARC_SPEED_MODE_BIT BIT(22)
#define FLAG_TARC_SET_BIT_ZERO BIT(23)
#define FLAG_RX_NEEDS_RESTART BIT(24)
#define FLAG_LSC_GIG_SPEED_DROP BIT(25)
#define FLAG_SMART_POWER_DOWN BIT(26)
#define FLAG_MSI_ENABLED BIT(27)
/* reserved BIT(28) */
#define FLAG_TSO_FORCE BIT(29)
#define FLAG_RESTART_NOW BIT(30)
#define FLAG_MSI_TEST_FAILED BIT(31)
#define FLAG2_CRC_STRIPPING BIT(0)
#define FLAG2_HAS_PHY_WAKEUP BIT(1)
#define FLAG2_IS_DISCARDING BIT(2)
#define FLAG2_DISABLE_ASPM_L1 BIT(3)
#define FLAG2_HAS_PHY_STATS BIT(4)
#define FLAG2_HAS_EEE BIT(5)
#define FLAG2_DMA_BURST BIT(6)
#define FLAG2_DISABLE_ASPM_L0S BIT(7)
#define FLAG2_DISABLE_AIM BIT(8)
#define FLAG2_CHECK_PHY_HANG BIT(9)
#define FLAG2_NO_DISABLE_RX BIT(10)
#define FLAG2_PCIM2PCI_ARBITER_WA BIT(11)
#define FLAG2_DFLT_CRC_STRIPPING BIT(12)
#define FLAG2_CHECK_RX_HWTSTAMP BIT(13)
#define FLAG2_CHECK_SYSTIM_OVERFLOW BIT(14)
#define E1000_RX_DESC_PS(R, i) \
(&(((union e1000_rx_desc_packet_split *)((R).desc))[i]))
#define E1000_RX_DESC_EXT(R, i) \
(&(((union e1000_rx_desc_extended *)((R).desc))[i]))
#define E1000_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
#define E1000_TX_DESC(R, i) E1000_GET_DESC(R, i, e1000_tx_desc)
#define E1000_CONTEXT_DESC(R, i) E1000_GET_DESC(R, i, e1000_context_desc)
enum e1000_state_t {
__E1000_TESTING,
__E1000_RESETTING,
e1000e: locking bug introduced by commit 67fd4fcb Commit 67fd4fcb (e1000e: convert to stats64) added the ability to update statistics more accurately and on-demand through the net_device_ops .ndo_get_stats64 hook, but introduced a locking bug on 82577/8/9 when linked at half-duplex (seen on kernels with CONFIG_DEBUG_ATOMIC_SLEEP=y and CONFIG_PROVE_LOCKING=y). The commit introduced code paths that caused a mutex to be locked in atomic contexts, e.g. an rcu_read_lock is held when irqbalance reads the stats from /sys/class/net/ethX/statistics causing the mutex to be locked to read the Phy half-duplex statistics registers. The mutex was originally introduced to prevent concurrent accesses of resources (the NVM and Phy) shared by the driver, firmware and hardware a few years back when there was an issue with the NVM getting corrupted. It was later split into two mutexes - one for the NVM and one for the Phy when it was determined the NVM, unlike the Phy, should not be protected by the software/firmware/hardware semaphore (arbitration of which is done in part with the SWFLAG bit in the EXTCNF_CTRL register). This latter semaphore should be sufficient to prevent resource contention of the Phy in the driver (i.e. the mutex for Phy accesses is not needed), but to be sure the mutex is replaced with an atomic bit flag which will warn if any contention is possible. Also add additional debug output to help determine when the sw/fw/hw semaphore is owned by the firmware or hardware. Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Reported-by: Francois Romieu <romieu@fr.zoreil.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
13 years ago
__E1000_ACCESS_SHARED_RESOURCE,
__E1000_DOWN
};
enum latency_range {
lowest_latency = 0,
low_latency = 1,
bulk_latency = 2,
latency_invalid = 255
};
extern char e1000e_driver_name[];
extern const char e1000e_driver_version[];
void e1000e_check_options(struct e1000_adapter *adapter);
void e1000e_set_ethtool_ops(struct net_device *netdev);
int e1000e_open(struct net_device *netdev);
int e1000e_close(struct net_device *netdev);
void e1000e_up(struct e1000_adapter *adapter);
void e1000e_down(struct e1000_adapter *adapter, bool reset);
void e1000e_reinit_locked(struct e1000_adapter *adapter);
void e1000e_reset(struct e1000_adapter *adapter);
void e1000e_power_up_phy(struct e1000_adapter *adapter);
int e1000e_setup_rx_resources(struct e1000_ring *ring);
int e1000e_setup_tx_resources(struct e1000_ring *ring);
void e1000e_free_rx_resources(struct e1000_ring *ring);
void e1000e_free_tx_resources(struct e1000_ring *ring);
void e1000e_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *stats);
void e1000e_set_interrupt_capability(struct e1000_adapter *adapter);
void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter);
void e1000e_get_hw_control(struct e1000_adapter *adapter);
void e1000e_release_hw_control(struct e1000_adapter *adapter);
void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr);
extern unsigned int copybreak;
extern const struct e1000_info e1000_82571_info;
extern const struct e1000_info e1000_82572_info;
extern const struct e1000_info e1000_82573_info;
extern const struct e1000_info e1000_82574_info;
extern const struct e1000_info e1000_82583_info;
extern const struct e1000_info e1000_ich8_info;
extern const struct e1000_info e1000_ich9_info;
extern const struct e1000_info e1000_ich10_info;
extern const struct e1000_info e1000_pch_info;
extern const struct e1000_info e1000_pch2_info;
extern const struct e1000_info e1000_pch_lpt_info;
extern const struct e1000_info e1000_pch_spt_info;
extern const struct e1000_info e1000_pch_cnp_info;
extern const struct e1000_info e1000_es2_info;
void e1000e_ptp_init(struct e1000_adapter *adapter);
void e1000e_ptp_remove(struct e1000_adapter *adapter);
static inline s32 e1000_phy_hw_reset(struct e1000_hw *hw)
{
return hw->phy.ops.reset(hw);
}
static inline s32 e1e_rphy(struct e1000_hw *hw, u32 offset, u16 *data)
{
return hw->phy.ops.read_reg(hw, offset, data);
}
static inline s32 e1e_rphy_locked(struct e1000_hw *hw, u32 offset, u16 *data)
{
return hw->phy.ops.read_reg_locked(hw, offset, data);
}
static inline s32 e1e_wphy(struct e1000_hw *hw, u32 offset, u16 data)
{
return hw->phy.ops.write_reg(hw, offset, data);
}
static inline s32 e1e_wphy_locked(struct e1000_hw *hw, u32 offset, u16 data)
{
return hw->phy.ops.write_reg_locked(hw, offset, data);
}
void e1000e_reload_nvm_generic(struct e1000_hw *hw);
static inline s32 e1000e_read_mac_addr(struct e1000_hw *hw)
{
if (hw->mac.ops.read_mac_addr)
return hw->mac.ops.read_mac_addr(hw);
return e1000_read_mac_addr_generic(hw);
}
static inline s32 e1000_validate_nvm_checksum(struct e1000_hw *hw)
{
return hw->nvm.ops.validate(hw);
}
static inline s32 e1000e_update_nvm_checksum(struct e1000_hw *hw)
{
return hw->nvm.ops.update(hw);
}
static inline s32 e1000_read_nvm(struct e1000_hw *hw, u16 offset, u16 words,
u16 *data)
{
return hw->nvm.ops.read(hw, offset, words, data);
}
static inline s32 e1000_write_nvm(struct e1000_hw *hw, u16 offset, u16 words,
u16 *data)
{
return hw->nvm.ops.write(hw, offset, words, data);
}
static inline s32 e1000_get_phy_info(struct e1000_hw *hw)
{
return hw->phy.ops.get_info(hw);
}
static inline u32 __er32(struct e1000_hw *hw, unsigned long reg)
{
return readl(hw->hw_addr + reg);
}
e1000e: 82579 potential system hang on stress when ME enabled Previously, a workaround was added to address a hardware bug in the PCIm2PCI arbiter where a write by the driver of the Transmit/Receive Descriptor Tail register could happen concurrently with a write of any MAC CSR register by the Manageability Engine (ME) which could cause the Tail register to have an incorrect value. The arbiter is supposed to prevent the concurrent writes but there is a bug that can cause the Host (driver) access to be acknowledged later than it should. After further investigation, it was discovered that a driver write access of any MAC CSR register after being idle for some time can be lost when ME is accessing a MAC CSR register. When this happens, no further target access is claimed by the MAC which could hang the system. The workaround to check bit 24 in the FWSM register (set only when ME is accessing a MAC CSR register) and delay for a limited amount of time until it is cleared is now done for all driver writes of MAC CSR registers on 82579 with ME enabled. In the rare case when the driver is writing the Tail register and ME is accessing any MAC CSR register for a duration longer than the maximum delay, write the register and verify it has the correct value before continuing, otherwise reset the device. This patch also moves some pre-existing macros from the hardware-specific header file to the more appropriate generic driver header file. Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
13 years ago
#define er32(reg) __er32(hw, E1000_##reg)
void __ew32(struct e1000_hw *hw, unsigned long reg, u32 val);
e1000e: 82579 potential system hang on stress when ME enabled Previously, a workaround was added to address a hardware bug in the PCIm2PCI arbiter where a write by the driver of the Transmit/Receive Descriptor Tail register could happen concurrently with a write of any MAC CSR register by the Manageability Engine (ME) which could cause the Tail register to have an incorrect value. The arbiter is supposed to prevent the concurrent writes but there is a bug that can cause the Host (driver) access to be acknowledged later than it should. After further investigation, it was discovered that a driver write access of any MAC CSR register after being idle for some time can be lost when ME is accessing a MAC CSR register. When this happens, no further target access is claimed by the MAC which could hang the system. The workaround to check bit 24 in the FWSM register (set only when ME is accessing a MAC CSR register) and delay for a limited amount of time until it is cleared is now done for all driver writes of MAC CSR registers on 82579 with ME enabled. In the rare case when the driver is writing the Tail register and ME is accessing any MAC CSR register for a duration longer than the maximum delay, write the register and verify it has the correct value before continuing, otherwise reset the device. This patch also moves some pre-existing macros from the hardware-specific header file to the more appropriate generic driver header file. Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
13 years ago
#define ew32(reg, val) __ew32(hw, E1000_##reg, (val))
#define e1e_flush() er32(STATUS)
#define E1000_WRITE_REG_ARRAY(a, reg, offset, value) \
(__ew32((a), (reg + ((offset) << 2)), (value)))
#define E1000_READ_REG_ARRAY(a, reg, offset) \
(readl((a)->hw_addr + reg + ((offset) << 2)))
#endif /* _E1000_H_ */