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[SCSI] qla4xxx: Quiesce driver activities while loopback
Quiesce all different activities performed by driver upon the link events while loopback diagnostics is in progress. Signed-off-by: Nilesh Javali <nilesh.javali@qlogic.com> Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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9cb33f184e
commit
026fbd3aaa
4 changed files with 45 additions and 3 deletions
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@ -501,6 +501,7 @@ struct scsi_qla_host {
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#define AF_INTERRUPTS_ON 6 /* 0x00000040 */
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#define AF_GET_CRASH_RECORD 7 /* 0x00000080 */
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#define AF_LINK_UP 8 /* 0x00000100 */
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#define AF_LOOPBACK 9 /* 0x00000200 */
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#define AF_IRQ_ATTACHED 10 /* 0x00000400 */
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#define AF_DISABLE_ACB_COMPLETE 11 /* 0x00000800 */
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#define AF_HA_REMOVAL 12 /* 0x00001000 */
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@ -840,7 +841,8 @@ static inline int is_aer_supported(struct scsi_qla_host *ha)
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static inline int adapter_up(struct scsi_qla_host *ha)
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{
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return (test_bit(AF_ONLINE, &ha->flags) != 0) &&
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(test_bit(AF_LINK_UP, &ha->flags) != 0);
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(test_bit(AF_LINK_UP, &ha->flags) != 0) &&
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(!test_bit(AF_LOOPBACK, &ha->flags));
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}
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static inline struct scsi_qla_host* to_qla_host(struct Scsi_Host *shost)
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@ -522,6 +522,10 @@ struct qla_flt_region {
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#define FLASH_OPT_COMMIT 2
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#define FLASH_OPT_RMW_COMMIT 3
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/* Loopback type */
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#define ENABLE_INTERNAL_LOOPBACK 0x04
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#define ENABLE_EXTERNAL_LOOPBACK 0x08
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/*************************************************************************/
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/* Host Adapter Initialization Control Block (from host) */
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@ -581,6 +581,33 @@ void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
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set_bit(DPC_RESET_HA, &ha->dpc_flags);
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}
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/**
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* qla4_83xx_loopback_in_progress: Is loopback in progress?
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* @ha: Pointer to host adapter structure.
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* @ret: 1 = loopback in progress, 0 = loopback not in progress
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**/
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static int qla4_83xx_loopback_in_progress(struct scsi_qla_host *ha)
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{
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int rval = 1;
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if (is_qla8032(ha)) {
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if ((ha->idc_info.info2 & ENABLE_INTERNAL_LOOPBACK) ||
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(ha->idc_info.info2 & ENABLE_EXTERNAL_LOOPBACK)) {
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DEBUG2(ql4_printk(KERN_INFO, ha,
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"%s: Loopback diagnostics in progress\n",
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__func__));
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rval = 1;
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} else {
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DEBUG2(ql4_printk(KERN_INFO, ha,
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"%s: Loopback diagnostics not in progress\n",
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__func__));
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rval = 0;
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}
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}
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return rval;
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}
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/**
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* qla4xxx_isr_decode_mailbox - decodes mailbox status
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* @ha: Pointer to host adapter structure.
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@ -676,8 +703,10 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
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case MBOX_ASTS_LINK_DOWN:
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clear_bit(AF_LINK_UP, &ha->flags);
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if (test_bit(AF_INIT_DONE, &ha->flags))
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if (test_bit(AF_INIT_DONE, &ha->flags)) {
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set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
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qla4xxx_wake_dpc(ha);
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}
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ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
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qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
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@ -840,6 +869,11 @@ static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
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DEBUG2(ql4_printk(KERN_INFO, ha,
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"scsi:%ld: AEN %04x IDC Complete notification\n",
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ha->host_no, mbox_sts[0]));
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if (qla4_83xx_loopback_in_progress(ha))
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set_bit(AF_LOOPBACK, &ha->flags);
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else
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clear_bit(AF_LOOPBACK, &ha->flags);
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}
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break;
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@ -2242,6 +2242,7 @@ static int qla4xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
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test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
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!test_bit(AF_ONLINE, &ha->flags) ||
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!test_bit(AF_LINK_UP, &ha->flags) ||
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test_bit(AF_LOOPBACK, &ha->flags) ||
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test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
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goto qc_host_busy;
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@ -3480,7 +3481,8 @@ static void qla4xxx_do_dpc(struct work_struct *work)
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}
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/* ---- link change? --- */
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if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
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if (!test_bit(AF_LOOPBACK, &ha->flags) &&
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test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
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if (!test_bit(AF_LINK_UP, &ha->flags)) {
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/* ---- link down? --- */
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qla4xxx_mark_all_devices_missing(ha);
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