summaryrefslogtreecommitdiff
path: root/drivers/scsi/qla2xxx/qla_os.c
diff options
context:
space:
mode:
authorSaurav Kashyap <saurav.kashyap@qlogic.com>2010-12-21 16:00:14 -0800
committerJames Bottomley <James.Bottomley@suse.de>2010-12-23 15:40:55 -0600
commit579d12b58abb4bd1161728f0a4a2524258ecf0a3 (patch)
tree53f9ff32d3112b3c850aa51de9f1bbef08fbf996 /drivers/scsi/qla2xxx/qla_os.c
parent5f7bb3a439ce51ae8b92ca1dc93b91712224b69a (diff)
[SCSI] qla2xxx: Added support for quiescence mode for ISP82xx.
Support is added for quiescence mode. This feature is for P3P adapters. Any of the functions can put the firmware into quiescence state. All the others have to ack that request. During quiescence mode current commands are processed and all the new incoming I/Os are blocked. Loop resync is performed after firmware comes out of quiescence state. Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com> Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_os.c')
-rw-r--r--drivers/scsi/qla2xxx/qla_os.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 2c0876c81a3f..df2c1e7ab652 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3386,6 +3386,21 @@ qla2x00_do_dpc(void *data)
clear_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags);
}
+ if (test_bit(ISP_QUIESCE_NEEDED, &base_vha->dpc_flags)) {
+ DEBUG(printk(KERN_INFO "scsi(%ld): dpc: sched "
+ "qla2x00_quiesce_needed ha = %p\n",
+ base_vha->host_no, ha));
+ qla82xx_device_state_handler(base_vha);
+ clear_bit(ISP_QUIESCE_NEEDED, &base_vha->dpc_flags);
+ if (!ha->flags.quiesce_owner) {
+ qla2x00_perform_loop_resync(base_vha);
+
+ qla82xx_idc_lock(ha);
+ qla82xx_clear_qsnt_ready(base_vha);
+ qla82xx_idc_unlock(ha);
+ }
+ }
+
if (test_and_clear_bit(RESET_MARKER_NEEDED,
&base_vha->dpc_flags) &&
(!(test_and_set_bit(RESET_ACTIVE, &base_vha->dpc_flags)))) {
@@ -3589,13 +3604,16 @@ qla2x00_timer(scsi_qla_host_t *vha)
return;
}
- if (IS_QLA82XX(ha))
- qla82xx_watchdog(vha);
-
/* Hardware read to raise pending EEH errors during mailbox waits. */
if (!pci_channel_offline(ha->pdev))
pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
+ if (IS_QLA82XX(ha)) {
+ if (test_bit(ISP_QUIESCE_NEEDED, &vha->dpc_flags))
+ start_dpc++;
+ qla82xx_watchdog(vha);
+ }
+
/* Loop down handler. */
if (atomic_read(&vha->loop_down_timer) > 0 &&
!(test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))