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scsi: ibmvfc: Send commands down HW Sub-CRQ when channelized 

When the client has negotiated the use of channels all vfcFrames are
required to go down a Sub-CRQ channel or it is a protocoal violation. If
the adapter state is channelized submit vfcFrames to the appropriate
Sub-CRQ via the h_send_sub_crq() helper.

Link: https://lore.kernel.org/r/20210114203148.246656-16-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Tyrel Datwyler 2021-01-14 14:31:42 -06:00 committed by Martin K. Petersen
parent cb72477be7
commit 31750fbd7b
1 changed files with 33 additions and 6 deletions
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39
drivers/scsi/ibmvscsi/ibmvfc.c
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@ -704,6 +704,15 @@ static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2)
return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
}
static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1,
u64 word2, u64 word3, u64 word4)
{
struct vio_dev *vdev = to_vio_dev(vhost->dev);
return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie,
word1, word2, word3, word4);
}
/**
* ibmvfc_send_crq_init - Send a CRQ init message
* @vhost: ibmvfc host struct
@ -1623,8 +1632,17 @@ static int ibmvfc_send_event(struct ibmvfc_event *evt,
mb();
if ((rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
be64_to_cpu(crq_as_u64[1])))) {
if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT)
rc = ibmvfc_send_sub_crq(vhost,
evt->queue->vios_cookie,
be64_to_cpu(crq_as_u64[0]),
be64_to_cpu(crq_as_u64[1]),
0, 0);
else
rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]),
be64_to_cpu(crq_as_u64[1]));
if (rc) {
list_del(&evt->queue_list);
spin_unlock_irqrestore(&evt->queue->l_lock, flags);
del_timer(&evt->timer);
@ -1842,6 +1860,7 @@ static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
struct ibmvfc_event *evt;
u32 tag_and_hwq = blk_mq_unique_tag(cmnd->request);
u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq);
u16 scsi_channel;
int rc;
if (unlikely((rc = fc_remote_port_chkready(rport))) ||
@ -1852,7 +1871,13 @@ static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
}
cmnd->result = (DID_OK << 16);
evt = ibmvfc_get_event(&vhost->crq);
if (vhost->using_channels) {
scsi_channel = hwq % vhost->scsi_scrqs.active_queues;
evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]);
evt->hwq = hwq % vhost->scsi_scrqs.active_queues;
} else
evt = ibmvfc_get_event(&vhost->crq);
ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT);
evt->cmnd = cmnd;
@ -1868,8 +1893,6 @@ static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
}
vfc_cmd->correlation = cpu_to_be64(evt);
if (vhost->using_channels)
evt->hwq = hwq % vhost->scsi_scrqs.active_queues;
if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
return ibmvfc_send_event(evt, vhost, 0);
@ -2200,7 +2223,11 @@ static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc)
spin_lock_irqsave(vhost->host->host_lock, flags);
if (vhost->state == IBMVFC_ACTIVE) {
evt = ibmvfc_get_event(&vhost->crq);
if (vhost->using_channels)
evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]);
else
evt = ibmvfc_get_event(&vhost->crq);
ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT);
tmf = ibmvfc_init_vfc_cmd(evt, sdev);
iu = ibmvfc_get_fcp_iu(vhost, tmf);