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scsi: qla2xxx: Flush mailbox commands on chip reset 

Flush pending mailbox commands on chip reset.  Wake up command that's
waiting for an interrupt and wait for mailbox counters to go to zero.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2018-08-02 13:16:52 -07:00 committed by Martin K. Petersen
parent cb97f2c2e8
commit b2000805a9
4 changed files with 74 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/scsi/qla2xxx/qla_def.h
View File

@ -3598,6 +3598,7 @@ struct qla_hw_data {
uint32_t detected_lr_sfp:1;
uint32_t using_lr_setting:1;
uint32_t rida_fmt2:1;
uint32_t purge_mbox:1;
} flags;
uint16_t max_exchg;
@ -3843,6 +3844,9 @@ struct qla_hw_data {
int port_down_retry_count;
uint8_t mbx_count;
uint8_t aen_mbx_count;
atomic_t num_pend_mbx_stage1;
atomic_t num_pend_mbx_stage2;
atomic_t num_pend_mbx_stage3;
uint32_t login_retry_count;
/* SNS command interfaces. */
@ -4156,6 +4160,7 @@ struct qla_hw_data {
struct work_struct board_disable;
struct mr_data_fx00 mr;
uint32_t chip_reset;
struct qlt_hw_data tgt;
int allow_cna_fw_dump;

21
drivers/scsi/qla2xxx/qla_init.c
View File

@ -6283,6 +6283,7 @@ qla2x00_abort_isp_cleanup(scsi_qla_host_t *vha)
ql_log(ql_log_info, vha, 0x00af,
"Performing ISP error recovery - ha=%p.\n", ha);
ha->flags.purge_mbox = 1;
/* For ISP82XX, reset_chip is just disabling interrupts.
* Driver waits for the completion of the commands.
* the interrupts need to be enabled.
@ -6297,13 +6298,31 @@ qla2x00_abort_isp_cleanup(scsi_qla_host_t *vha)
ha->current_topology = 0;
ha->flags.fw_started = 0;
ha->flags.fw_init_done = 0;
ha->base_qpair->chip_reset++;
ha->chip_reset++;
ha->base_qpair->chip_reset = ha->chip_reset;
for (i = 0; i < ha->max_qpairs; i++) {
if (ha->queue_pair_map[i])
ha->queue_pair_map[i]->chip_reset =
ha->base_qpair->chip_reset;
}
/* purge MBox commands */
if (atomic_read(&ha->num_pend_mbx_stage3)) {
clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
complete(&ha->mbx_intr_comp);
}
i = 0;
while (atomic_read(&ha->num_pend_mbx_stage3) ||
atomic_read(&ha->num_pend_mbx_stage2) ||
atomic_read(&ha->num_pend_mbx_stage1)) {
msleep(20);
i++;
if (i > 50)
break;
}
ha->flags.purge_mbox = 0;
atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
atomic_set(&vha->loop_state, LOOP_DOWN);

50
drivers/scsi/qla2xxx/qla_mbx.c
View File

@ -110,6 +110,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
unsigned long wait_time;
struct qla_hw_data *ha = vha->hw;
scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
u32 chip_reset;
ql_dbg(ql_dbg_mbx, vha, 0x1000, "Entered %s.\n", __func__);
@ -140,7 +141,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
rval = QLA_SUCCESS;
abort_active = test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags);
chip_reset = ha->chip_reset;
if (ha->flags.pci_channel_io_perm_failure) {
ql_log(ql_log_warn, vha, 0x1003,
@ -167,6 +168,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
return QLA_FUNCTION_TIMEOUT;
}
atomic_inc(&ha->num_pend_mbx_stage1);
/*
* Wait for active mailbox commands to finish by waiting at most tov
* seconds. This is to serialize actual issuing of mailbox cmds during
@ -177,8 +179,14 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
ql_log(ql_log_warn, vha, 0xd035,
"Cmd access timeout, cmd=0x%x, Exiting.\n",
mcp->mb[0]);
atomic_dec(&ha->num_pend_mbx_stage1);
return QLA_FUNCTION_TIMEOUT;
}
atomic_dec(&ha->num_pend_mbx_stage1);
if (ha->flags.purge_mbox || chip_reset != ha->chip_reset) {
rval = QLA_ABORTED;
goto premature_exit;
}
ha->flags.mbox_busy = 1;
/* Save mailbox command for debug */
@ -189,6 +197,13 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
spin_lock_irqsave(&ha->hardware_lock, flags);
if (ha->flags.purge_mbox || chip_reset != ha->chip_reset) {
rval = QLA_ABORTED;
ha->flags.mbox_busy = 0;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
goto premature_exit;
}
/* Load mailbox registers. */
if (IS_P3P_TYPE(ha))
optr = (uint16_t __iomem *)&reg->isp82.mailbox_in[0];
@ -231,7 +246,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
"jiffies=%lx.\n", jiffies);
/* Wait for mbx cmd completion until timeout */
atomic_inc(&ha->num_pend_mbx_stage2);
if ((!abort_active && io_lock_on) || IS_NOPOLLING_TYPE(ha)) {
set_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
@ -241,6 +256,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
spin_unlock_irqrestore(&ha->hardware_lock,
flags);
ha->flags.mbox_busy = 0;
atomic_dec(&ha->num_pend_mbx_stage2);
ql_dbg(ql_dbg_mbx, vha, 0x1010,
"Pending mailbox timeout, exiting.\n");
rval = QLA_FUNCTION_TIMEOUT;
@ -254,6 +270,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
wait_time = jiffies;
atomic_inc(&ha->num_pend_mbx_stage3);
if (!wait_for_completion_timeout(&ha->mbx_intr_comp,
mcp->tov * HZ)) {
ql_dbg(ql_dbg_mbx, vha, 0x117a,
@ -261,7 +278,17 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
spin_lock_irqsave(&ha->hardware_lock, flags);
clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
} else if (ha->flags.purge_mbox ||
chip_reset != ha->chip_reset) {
ha->flags.mbox_busy = 0;
atomic_dec(&ha->num_pend_mbx_stage2);
atomic_dec(&ha->num_pend_mbx_stage3);
rval = QLA_ABORTED;
goto premature_exit;
}
atomic_dec(&ha->num_pend_mbx_stage3);
if (time_after(jiffies, wait_time + 5 * HZ))
ql_log(ql_log_warn, vha, 0x1015, "cmd=0x%x, waited %d msecs\n",
command, jiffies_to_msecs(jiffies - wait_time));
@ -275,6 +302,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
spin_unlock_irqrestore(&ha->hardware_lock,
flags);
ha->flags.mbox_busy = 0;
atomic_dec(&ha->num_pend_mbx_stage2);
ql_dbg(ql_dbg_mbx, vha, 0x1012,
"Pending mailbox timeout, exiting.\n");
rval = QLA_FUNCTION_TIMEOUT;
@ -289,6 +317,14 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
wait_time = jiffies + mcp->tov * HZ; /* wait at most tov secs */
while (!ha->flags.mbox_int) {
if (ha->flags.purge_mbox ||
chip_reset != ha->chip_reset) {
ha->flags.mbox_busy = 0;
atomic_dec(&ha->num_pend_mbx_stage2);
rval = QLA_ABORTED;
goto premature_exit;
}
if (time_after(jiffies, wait_time))
break;
@ -312,6 +348,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
"Waited %d sec.\n",
(uint)((jiffies - (wait_time - (mcp->tov * HZ)))/HZ));
}
atomic_dec(&ha->num_pend_mbx_stage2);
/* Check whether we timed out */
if (ha->flags.mbox_int) {
@ -390,7 +427,8 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
/* Capture FW dump only, if PCI device active */
if (!pci_channel_offline(vha->hw->pdev)) {
pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
if (w == 0xffff || ictrl == 0xffffffff) {
if (w == 0xffff || ictrl == 0xffffffff ||
(chip_reset != ha->chip_reset)) {
/* This is special case if there is unload
* of driver happening and if PCI device go
* into bad state due to PCI error condition
@ -497,7 +535,11 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
complete(&ha->mbx_cmd_comp);
mbx_done:
if (rval) {
if (rval == QLA_ABORTED) {
ql_log(ql_log_info, vha, 0xd035,
"Chip Reset in progress. Purging Mbox cmd=0x%x.\n",
mcp->mb[0]);
} else if (rval) {
if (ql2xextended_error_logging & (ql_dbg_disc|ql_dbg_mbx)) {
pr_warn("%s [%s]-%04x:%ld: **** Failed", QL_MSGHDR,
dev_name(&ha->pdev->dev), 0x1020+0x800,

3
drivers/scsi/qla2xxx/qla_os.c
View File

@ -2815,6 +2815,9 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
ha->link_data_rate = PORT_SPEED_UNKNOWN;
ha->optrom_size = OPTROM_SIZE_2300;
ha->max_exchg = FW_MAX_EXCHANGES_CNT;
atomic_set(&ha->num_pend_mbx_stage1, 0);
atomic_set(&ha->num_pend_mbx_stage2, 0);
atomic_set(&ha->num_pend_mbx_stage3, 0);
/* Assign ISP specific operations. */
if (IS_QLA2100(ha)) {