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scsi: lpfc: Add MDS driver loopback diagnostics support

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Added code to support driver loopback with MDS Diagnostics.  This style of
diagnostics passes frames from the fabric to the driver who then echo them
back out the link.  SEND_FRAME WQEs are used to transmit the frames.  Added
the SOF and EOF field location definitions for use by SEND_FRAME.

Also ensure that enable_mds_diags is a RW parameter.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2019-08-14 16:57:08 -07:00 committed by Martin K. Petersen
parent ec76242f3b
commit e62245d923
4 changed files with 38 additions and 11 deletions
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2
drivers/scsi/lpfc/lpfc_attr.c
View File

@ -5912,7 +5912,7 @@ lpfc_sg_seg_cnt_init(struct lpfc_hba *phba, int val)
* 1 = MDS Diagnostics enabled
* Value range is [0,1]. Default value is 0.
*/
LPFC_ATTR_R(enable_mds_diags, 0, 0, 1, "Enable MDS Diagnostics");
LPFC_ATTR_RW(enable_mds_diags, 0, 0, 1, "Enable MDS Diagnostics");
/*
* lpfc_ras_fwlog_buffsize: Firmware logging host buffer size

11
drivers/scsi/lpfc/lpfc_els.c
View File

@ -1052,17 +1052,18 @@ stop_rr_fcf_flogi:
if (lpfc_els_retry(phba, cmdiocb, rspiocb))
goto out;
lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
"0150 FLOGI failure Status:x%x/x%x "
"xri x%x TMO:x%x\n",
irsp->ulpStatus, irsp->un.ulpWord[4],
cmdiocb->sli4_xritag, irsp->ulpTimeout);
/* If this is not a loop open failure, bail out */
if (!(irsp->ulpStatus == IOSTAT_LOCAL_REJECT &&
((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) ==
IOERR_LOOP_OPEN_FAILURE)))
goto flogifail;
lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
"0150 FLOGI failure Status:x%x/x%x xri x%x TMO:x%x\n",
irsp->ulpStatus, irsp->un.ulpWord[4],
cmdiocb->sli4_xritag, irsp->ulpTimeout);
/* FLOGI failed, so there is no fabric */
spin_lock_irq(shost->host_lock);
vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);

6
drivers/scsi/lpfc/lpfc_hw4.h
View File

@ -4314,6 +4314,12 @@ struct wqe_common {
#define wqe_rcvoxid_SHIFT 16
#define wqe_rcvoxid_MASK 0x0000FFFF
#define wqe_rcvoxid_WORD word9
#define wqe_sof_SHIFT 24
#define wqe_sof_MASK 0x000000FF
#define wqe_sof_WORD word9
#define wqe_eof_SHIFT 16
#define wqe_eof_MASK 0x000000FF
#define wqe_eof_WORD word9
uint32_t word10;
#define wqe_ebde_cnt_SHIFT 0
#define wqe_ebde_cnt_MASK 0x0000000f

30
drivers/scsi/lpfc/lpfc_sli.c
View File

@ -9352,11 +9352,9 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
memset(wqe, 0, sizeof(union lpfc_wqe128));
/* Some of the fields are in the right position already */
memcpy(wqe, &iocbq->iocb, sizeof(union lpfc_wqe));
if (iocbq->iocb.ulpCommand != CMD_SEND_FRAME) {
/* The ct field has moved so reset */
wqe->generic.wqe_com.word7 = 0;
wqe->generic.wqe_com.word10 = 0;
}
/* The ct field has moved so reset */
wqe->generic.wqe_com.word7 = 0;
wqe->generic.wqe_com.word10 = 0;
abort_tag = (uint32_t) iocbq->iotag;
xritag = iocbq->sli4_xritag;
@ -9862,6 +9860,15 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
break;
case CMD_SEND_FRAME:
bf_set(wqe_cmnd, &wqe->generic.wqe_com, CMD_SEND_FRAME);
bf_set(wqe_sof, &wqe->generic.wqe_com, 0x2E); /* SOF byte */
bf_set(wqe_eof, &wqe->generic.wqe_com, 0x41); /* EOF byte */
bf_set(wqe_lenloc, &wqe->generic.wqe_com, 1);
bf_set(wqe_xbl, &wqe->generic.wqe_com, 1);
bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
bf_set(wqe_xc, &wqe->generic.wqe_com, 1);
bf_set(wqe_cmd_type, &wqe->generic.wqe_com, 0xA);
bf_set(wqe_cqid, &wqe->generic.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
bf_set(wqe_xri_tag, &wqe->generic.wqe_com, xritag);
bf_set(wqe_reqtag, &wqe->generic.wqe_com, iocbq->iotag);
return 0;
@ -16940,6 +16947,8 @@ lpfc_fc_frame_check(struct lpfc_hba *phba, struct fc_frame_header *fc_hdr)
struct fc_vft_header *fc_vft_hdr;
uint32_t *header = (uint32_t *) fc_hdr;
#define FC_RCTL_MDS_DIAGS 0xF4
switch (fc_hdr->fh_r_ctl) {
case FC_RCTL_DD_UNCAT: /* uncategorized information */
case FC_RCTL_DD_SOL_DATA: /* solicited data */
@ -17949,6 +17958,17 @@ lpfc_sli4_handle_received_buffer(struct lpfc_hba *phba,
fcfi = bf_get(lpfc_rcqe_fcf_id,
&dmabuf->cq_event.cqe.rcqe_cmpl);
if (fc_hdr->fh_r_ctl == 0xF4 && fc_hdr->fh_type == 0xFF) {
vport = phba->pport;
lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
"2023 MDS Loopback %d bytes\n",
bf_get(lpfc_rcqe_length,
&dmabuf->cq_event.cqe.rcqe_cmpl));
/* Handle MDS Loopback frames */
lpfc_sli4_handle_mds_loopback(vport, dmabuf);
return;
}
/* d_id this frame is directed to */
did = sli4_did_from_fc_hdr(fc_hdr);