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[SCSI] qla2xxx: Workaround D3 power-management issues.

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Early ISP2432 parts have a known hardware issue when coming
out of a D3 hot state.  This issue can result in a hung PCIe
link.  Recent firmwares contain a workaround whereby the
stop-firmware mailbox command prevents the ISP from entering
the D3 hot state.

In order to ensure that the workaround succeeded the driver
must verify that the stop-firmware mailbox command completes
successfully.  In the event of a failure, the driver
attempts a shutdown-retry after resetting the ISP and
re-executing firmware.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Andrew Vasquez 2006-10-13 09:33:38 -07:00 committed by James Bottomley
parent f1663ad5db
commit 18c6c12759
3 changed files with 25 additions and 3 deletions
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1
drivers/scsi/qla2xxx/qla_gbl.h
View File

@ -48,6 +48,7 @@ extern void qla2x00_update_fcport(scsi_qla_host_t *, fc_port_t *);
extern void qla2x00_reg_remote_port(scsi_qla_host_t *, fc_port_t *);
extern void qla2x00_alloc_fw_dump(scsi_qla_host_t *);
extern void qla2x00_try_to_stop_firmware(scsi_qla_host_t *);
/*
* Global Data in qla_os.c source file.

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

@ -3948,3 +3948,24 @@ qla24xx_load_risc(scsi_qla_host_t *ha, uint32_t *srisc_addr)
fail_fw_integrity:
return QLA_FUNCTION_FAILED;
}
void
qla2x00_try_to_stop_firmware(scsi_qla_host_t *ha)
{
int ret, retries;
if (!IS_QLA24XX(ha) && !IS_QLA54XX(ha))
return;
ret = qla2x00_stop_firmware(ha);
for (retries = 5; ret != QLA_SUCCESS && retries ; retries--) {
qla2x00_reset_chip(ha);
if (qla2x00_chip_diag(ha) != QLA_SUCCESS)
continue;
if (qla2x00_setup_chip(ha) != QLA_SUCCESS)
continue;
qla_printk(KERN_INFO, ha,
"Attempting retry of stop-firmware command...\n");
ret = qla2x00_stop_firmware(ha);
}
}

6
drivers/scsi/qla2xxx/qla_os.c
View File

@ -1712,8 +1712,10 @@ qla2x00_free_device(scsi_qla_host_t *ha)
if (ha->eft)
qla2x00_trace_control(ha, TC_DISABLE, 0, 0);
ha->flags.online = 0;
/* Stop currently executing firmware. */
qla2x00_stop_firmware(ha);
qla2x00_try_to_stop_firmware(ha);
/* turn-off interrupts on the card */
if (ha->interrupts_on)
@ -1721,8 +1723,6 @@ qla2x00_free_device(scsi_qla_host_t *ha)
qla2x00_mem_free(ha);
ha->flags.online = 0;
/* Detach interrupts */
if (ha->host->irq)
free_irq(ha->host->irq, ha);