scsi: lpfc: Add support for the CM framework

Complete the enablement of the cm framework feature in the adapter. Perform
the following:

 - Detect the presence of the congestion management framework feature.

When the cm framework is present:

 - Issue the SET_FEATURE command to enable the feature.

 - Register the cm statistics buffer with the adapter.

 - Read the cm enablement buffer to determine the cm framework state for cm
   management.

When cm management is enabled:

 - Monitor all FPIN and congestion signalling events, incrementing
   counters.

 - Regularly sync with the adapter to communicate congestion events and to
   receive an rx request limit.

 - Monitor requests for rx data and ensure that no more than the
   adapter prescribed limit is issued on the link. If the limit is
   exceeded, SCSI and/or NVMe traffic is temporarily suspended.

 - Maintain the minute, hourly, daily statistics buffer.

 - Monitor for congestion enablement change events, causing a reread of the
   enablement buffer and acting on any change in enablement.

And:

 - Add teardown logic, including buffer deregistration, on adapter
   detachment or reset.

Link: https://lore.kernel.org/r/20210816162901.121235-10-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
index f250b666ac57..99c5d1e4da5e 100644
--- a/drivers/scsi/lpfc/lpfc_sli4.h
+++ b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -557,6 +557,7 @@ struct lpfc_pc_sli4_params {
 	uint16_t mi_value;
 #define LPFC_DFLT_MIB_VAL	2
 	uint8_t mib_bde_cnt;
+	uint8_t cmf;
 	uint8_t cqv;
 	uint8_t mqv;
 	uint8_t wqv;