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scsi: lpfc: Add Buffer to Buffer credit recovery support

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Add Buffer to buffer credit recovery support to the driver.  This is a
negotiated feature with the peer that allows for both sides to detect
dropped RRDY's and FC Frames and recover credit.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
2017-08-23 16:55:47 -07:00
committed by Martin K. Petersen
parent d58734f05f
commit 44fd7fe3dd
10 changed files with 162 additions and 14 deletions
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18
drivers/scsi/lpfc/lpfc_hw.h
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@@ -2293,15 +2293,27 @@ typedef struct {
uint32_t rttov;
uint32_t altov;
uint32_t crtov;
uint32_t citov;
#ifdef __BIG_ENDIAN_BITFIELD
uint32_t rsvd4:19;
uint32_t cscn:1;
uint32_t bbscn:4;
uint32_t rsvd3:8;
#else /* __LITTLE_ENDIAN_BITFIELD */
uint32_t rsvd3:8;
uint32_t bbscn:4;
uint32_t cscn:1;
uint32_t rsvd4:19;
#endif
#ifdef __BIG_ENDIAN_BITFIELD
uint32_t rrq_enable:1;
uint32_t rrq_immed:1;
uint32_t rsvd4:29;
uint32_t rsvd5:29;
uint32_t ack0_enable:1;
#else /* __LITTLE_ENDIAN_BITFIELD */
uint32_t ack0_enable:1;
uint32_t rsvd4:29;
uint32_t rsvd5:29;
uint32_t rrq_immed:1;
uint32_t rrq_enable:1;
#endif