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[SCSI] qla2xxx: Added support for quiescence mode for ISP82xx.

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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>
This commit is contained in:
Saurav Kashyap
2010-12-21 16:00:14 -08:00
committed by James Bottomley
parent 5f7bb3a439
commit 579d12b58a
5 changed files with 224 additions and 6 deletions
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3
drivers/scsi/qla2xxx/qla_def.h
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@@ -2425,6 +2425,8 @@ struct qla_hw_data {
uint32_t disable_msix_handshake :1;
uint32_t fcp_prio_enabled :1;
uint32_t fw_hung :1;
uint32_t quiesce_owner:1;
/* 29 bits */
} flags;
/* This spinlock is used to protect "io transactions", you must
@@ -2863,6 +2865,7 @@ typedef struct scsi_qla_host {
#define ISP_UNRECOVERABLE 17
#define FCOE_CTX_RESET_NEEDED 18 /* Initiate FCoE context reset */
#define MPI_RESET_NEEDED 19 /* Initiate MPI FW reset */
#define ISP_QUIESCE_NEEDED 20 /* Driver need some quiescence */
uint32_t device_flags;
#define SWITCH_FOUND BIT_0