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Merge branch 'bnxt_en-bug-fixes'

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Michael Chan says:

====================
bnxt_en: Bug fixes.

These 5 bug fixes are all related to the firmware reset or AER recovery.
2 patches fix the cleanup logic for the workqueue used to handle firmware
reset and recovery. 1 patch ensures that the chip will have the proper
BAR addresses latched after fatal AER recovery.  1 patch fixes the
open path to check for firmware reset abort error.  The last one
sends the fw reset command unconditionally to fix the AER reset logic.
====================

Link: https://lore.kernel.org/r/1603685901-17917-1-git-send-email-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2020-10-26 18:26:38 -07:00
commit 10067b5019
2 changed files with 32 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -1160,16 +1160,6 @@ static void bnxt_queue_sp_work(struct bnxt *bp)
schedule_work(&bp->sp_task);
}
static void bnxt_cancel_sp_work(struct bnxt *bp)
{
if (BNXT_PF(bp)) {
flush_workqueue(bnxt_pf_wq);
} else {
cancel_work_sync(&bp->sp_task);
cancel_delayed_work_sync(&bp->fw_reset_task);
}
}
static void bnxt_sched_reset(struct bnxt *bp, struct bnxt_rx_ring_info *rxr)
{
if (!rxr->bnapi->in_reset) {
@ -4362,7 +4352,8 @@ static int bnxt_hwrm_do_send_msg(struct bnxt *bp, void *msg, u32 msg_len,
u32 bar_offset = BNXT_GRCPF_REG_CHIMP_COMM;
u16 dst = BNXT_HWRM_CHNL_CHIMP;
if (BNXT_NO_FW_ACCESS(bp))
if (BNXT_NO_FW_ACCESS(bp) &&
le16_to_cpu(req->req_type) != HWRM_FUNC_RESET)
return -EBUSY;
if (msg_len > BNXT_HWRM_MAX_REQ_LEN) {
@ -9789,6 +9780,9 @@ int bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
{
int rc = 0;
if (test_bit(BNXT_STATE_ABORT_ERR, &bp->state))
rc = -EIO;
if (!rc)
rc = __bnxt_open_nic(bp, irq_re_init, link_re_init);
if (rc) {
netdev_err(bp->dev, "nic open fail (rc: %x)\n", rc);
@ -12108,15 +12102,17 @@ static void bnxt_remove_one(struct pci_dev *pdev)
if (BNXT_PF(bp))
bnxt_sriov_disable(bp);
clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
bnxt_cancel_sp_work(bp);
bp->sp_event = 0;
bnxt_dl_fw_reporters_destroy(bp, true);
if (BNXT_PF(bp))
devlink_port_type_clear(&bp->dl_port);
pci_disable_pcie_error_reporting(pdev);
unregister_netdev(dev);
clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
/* Flush any pending tasks */
cancel_work_sync(&bp->sp_task);
cancel_delayed_work_sync(&bp->fw_reset_task);
bp->sp_event = 0;
bnxt_dl_fw_reporters_destroy(bp, true);
bnxt_dl_unregister(bp);
bnxt_shutdown_tc(bp);
@ -12860,6 +12856,9 @@ static pci_ers_result_t bnxt_io_error_detected(struct pci_dev *pdev,
return PCI_ERS_RESULT_DISCONNECT;
}
if (state == pci_channel_io_frozen)
set_bit(BNXT_STATE_PCI_CHANNEL_IO_FROZEN, &bp->state);
if (netif_running(netdev))
bnxt_close(netdev);
@ -12886,7 +12885,7 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct bnxt *bp = netdev_priv(netdev);
int err = 0;
int err = 0, off;
pci_ers_result_t result = PCI_ERS_RESULT_DISCONNECT;
netdev_info(bp->dev, "PCI Slot Reset\n");
@ -12898,6 +12897,20 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
"Cannot re-enable PCI device after reset.\n");
} else {
pci_set_master(pdev);
/* Upon fatal error, our device internal logic that latches to
* BAR value is getting reset and will restore only upon
* rewritting the BARs.
*
* As pci_restore_state() does not re-write the BARs if the
* value is same as saved value earlier, driver needs to
* write the BARs to 0 to force restore, in case of fatal error.
*/
if (test_and_clear_bit(BNXT_STATE_PCI_CHANNEL_IO_FROZEN,
&bp->state)) {
for (off = PCI_BASE_ADDRESS_0;
off <= PCI_BASE_ADDRESS_5; off += 4)
pci_write_config_dword(bp->pdev, off, 0);
}
pci_restore_state(pdev);
pci_save_state(pdev);

1
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -1781,6 +1781,7 @@ struct bnxt {
#define BNXT_STATE_ABORT_ERR 5
#define BNXT_STATE_FW_FATAL_COND 6
#define BNXT_STATE_DRV_REGISTERED 7
#define BNXT_STATE_PCI_CHANNEL_IO_FROZEN 8
#define BNXT_NO_FW_ACCESS(bp) \
(test_bit(BNXT_STATE_FW_FATAL_COND, &(bp)->state) || \