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scsi: lpfc: Synchronize link speed with boot driver

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Synchronize link speed with boot driver

Link speed settings set by the boot driver are reported by the hw.
Driver will attempt to read them, and if set, will respect their
values.
The driver can override the settings with its own if instructed by
user space (via bsg), with the new values being picked up by the
boot driver.

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>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart
2016-10-13 15:06:16 -07:00
committed by Martin K. Petersen
parent 89533e9be0
commit c691816e00
6 changed files with 122 additions and 1 deletions
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45
drivers/scsi/lpfc/lpfc_bsg.c
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@@ -5185,6 +5185,48 @@ no_dd_data:
return rc;
}
static int
lpfc_forced_link_speed(struct fc_bsg_job *job)
{
struct Scsi_Host *shost = job->shost;
struct lpfc_vport *vport = shost_priv(shost);
struct lpfc_hba *phba = vport->phba;
struct forced_link_speed_support_reply *forced_reply;
int rc = 0;
if (job->request_len <
sizeof(struct fc_bsg_request) +
sizeof(struct get_forced_link_speed_support)) {
lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
"0048 Received FORCED_LINK_SPEED request "
"below minimum size\n");
rc = -EINVAL;
goto job_error;
}
forced_reply = (struct forced_link_speed_support_reply *)
job->reply->reply_data.vendor_reply.vendor_rsp;
if (job->reply_len <
sizeof(struct fc_bsg_request) +
sizeof(struct forced_link_speed_support_reply)) {
lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
"0049 Received FORCED_LINK_SPEED reply below "
"minimum size\n");
rc = -EINVAL;
goto job_error;
}
forced_reply->supported = (phba->hba_flag & HBA_FORCED_LINK_SPEED)
? LPFC_FORCED_LINK_SPEED_SUPPORTED
: LPFC_FORCED_LINK_SPEED_NOT_SUPPORTED;
job_error:
job->reply->result = rc;
if (rc == 0)
job->job_done(job);
return rc;
}
/**
* lpfc_bsg_hst_vendor - process a vendor-specific fc_bsg_job
* @job: fc_bsg_job to handle
@@ -5227,6 +5269,9 @@ lpfc_bsg_hst_vendor(struct fc_bsg_job *job)
case LPFC_BSG_VENDOR_MENLO_DATA:
rc = lpfc_menlo_cmd(job);
break;
case LPFC_BSG_VENDOR_FORCED_LINK_SPEED:
rc = lpfc_forced_link_speed(job);
break;
default:
rc = -EINVAL;
job->reply->reply_payload_rcv_len = 0;