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https://github.com/FEX-Emu/linux.git
synced 2024-12-26 11:28:28 +00:00
[SCSI] ibmvfc: Add FC Passthru support
Adds support for FC passthru via BSG. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Brian King
James Bottomley
parent
4a5c4a5ed2
commit
d31429e151
@ -39,6 +39,7 @@
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_transport_fc.h>
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#include <scsi/scsi_bsg_fc.h>
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#include "ibmvfc.h"
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static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT;
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@ -1674,6 +1675,276 @@ static void ibmvfc_sync_completion(struct ibmvfc_event *evt)
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complete(&evt->comp);
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}
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/**
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* ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands
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* @evt: struct ibmvfc_event
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*
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**/
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static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt)
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{
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struct ibmvfc_host *vhost = evt->vhost;
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ibmvfc_free_event(evt);
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vhost->aborting_passthru = 0;
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dev_info(vhost->dev, "Passthru command cancelled\n");
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}
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/**
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* ibmvfc_bsg_timeout - Handle a BSG timeout
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* @job: struct fc_bsg_job that timed out
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*
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* Returns:
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* 0 on success / other on failure
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**/
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static int ibmvfc_bsg_timeout(struct fc_bsg_job *job)
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{
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struct ibmvfc_host *vhost = shost_priv(job->shost);
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unsigned long port_id = (unsigned long)job->dd_data;
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struct ibmvfc_event *evt;
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struct ibmvfc_tmf *tmf;
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unsigned long flags;
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int rc;
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ENTER;
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spin_lock_irqsave(vhost->host->host_lock, flags);
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if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) {
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__ibmvfc_reset_host(vhost);
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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return 0;
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}
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vhost->aborting_passthru = 1;
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evt = ibmvfc_get_event(vhost);
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ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT);
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tmf = &evt->iu.tmf;
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memset(tmf, 0, sizeof(*tmf));
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tmf->common.version = 1;
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tmf->common.opcode = IBMVFC_TMF_MAD;
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tmf->common.length = sizeof(*tmf);
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tmf->scsi_id = port_id;
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tmf->cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
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tmf->my_cancel_key = IBMVFC_INTERNAL_CANCEL_KEY;
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rc = ibmvfc_send_event(evt, vhost, default_timeout);
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if (rc != 0) {
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vhost->aborting_passthru = 0;
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dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc);
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rc = -EIO;
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} else
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dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n",
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port_id);
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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LEAVE;
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return rc;
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}
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/**
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* ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command
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* @vhost: struct ibmvfc_host to send command
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* @port_id: port ID to send command
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*
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* Returns:
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* 0 on success / other on failure
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**/
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static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id)
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{
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struct ibmvfc_port_login *plogi;
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struct ibmvfc_target *tgt;
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struct ibmvfc_event *evt;
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union ibmvfc_iu rsp_iu;
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unsigned long flags;
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int rc = 0, issue_login = 1;
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ENTER;
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spin_lock_irqsave(vhost->host->host_lock, flags);
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list_for_each_entry(tgt, &vhost->targets, queue) {
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if (tgt->scsi_id == port_id) {
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issue_login = 0;
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break;
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}
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}
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if (!issue_login)
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goto unlock_out;
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if (unlikely((rc = ibmvfc_host_chkready(vhost))))
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goto unlock_out;
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evt = ibmvfc_get_event(vhost);
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ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
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plogi = &evt->iu.plogi;
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memset(plogi, 0, sizeof(*plogi));
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plogi->common.version = 1;
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plogi->common.opcode = IBMVFC_PORT_LOGIN;
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plogi->common.length = sizeof(*plogi);
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plogi->scsi_id = port_id;
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evt->sync_iu = &rsp_iu;
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init_completion(&evt->comp);
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rc = ibmvfc_send_event(evt, vhost, default_timeout);
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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if (rc)
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return -EIO;
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wait_for_completion(&evt->comp);
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if (rsp_iu.plogi.common.status)
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rc = -EIO;
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spin_lock_irqsave(vhost->host->host_lock, flags);
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ibmvfc_free_event(evt);
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unlock_out:
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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LEAVE;
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return rc;
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}
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/**
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* ibmvfc_bsg_request - Handle a BSG request
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* @job: struct fc_bsg_job to be executed
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*
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* Returns:
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* 0 on success / other on failure
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**/
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static int ibmvfc_bsg_request(struct fc_bsg_job *job)
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{
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struct ibmvfc_host *vhost = shost_priv(job->shost);
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struct fc_rport *rport = job->rport;
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struct ibmvfc_passthru_mad *mad;
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struct ibmvfc_event *evt;
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union ibmvfc_iu rsp_iu;
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unsigned long flags, port_id = -1;
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unsigned int code = job->request->msgcode;
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int rc = 0, req_seg, rsp_seg, issue_login = 0;
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u32 fc_flags, rsp_len;
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ENTER;
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job->reply->reply_payload_rcv_len = 0;
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if (rport)
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port_id = rport->port_id;
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switch (code) {
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case FC_BSG_HST_ELS_NOLOGIN:
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port_id = (job->request->rqst_data.h_els.port_id[0] << 16) |
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(job->request->rqst_data.h_els.port_id[1] << 8) |
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job->request->rqst_data.h_els.port_id[2];
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case FC_BSG_RPT_ELS:
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fc_flags = IBMVFC_FC_ELS;
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break;
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case FC_BSG_HST_CT:
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issue_login = 1;
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port_id = (job->request->rqst_data.h_ct.port_id[0] << 16) |
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(job->request->rqst_data.h_ct.port_id[1] << 8) |
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job->request->rqst_data.h_ct.port_id[2];
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case FC_BSG_RPT_CT:
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fc_flags = IBMVFC_FC_CT_IU;
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break;
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default:
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return -ENOTSUPP;
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};
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if (port_id == -1)
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return -EINVAL;
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if (!mutex_trylock(&vhost->passthru_mutex))
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return -EBUSY;
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job->dd_data = (void *)port_id;
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req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list,
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job->request_payload.sg_cnt, DMA_TO_DEVICE);
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if (!req_seg) {
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mutex_unlock(&vhost->passthru_mutex);
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return -ENOMEM;
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}
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rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list,
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job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
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if (!rsp_seg) {
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dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
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job->request_payload.sg_cnt, DMA_TO_DEVICE);
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mutex_unlock(&vhost->passthru_mutex);
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return -ENOMEM;
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}
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if (req_seg > 1 || rsp_seg > 1) {
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rc = -EINVAL;
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goto out;
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}
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if (issue_login)
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rc = ibmvfc_bsg_plogi(vhost, port_id);
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spin_lock_irqsave(vhost->host->host_lock, flags);
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if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) ||
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unlikely((rc = ibmvfc_host_chkready(vhost)))) {
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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goto out;
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}
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evt = ibmvfc_get_event(vhost);
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ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT);
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mad = &evt->iu.passthru;
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memset(mad, 0, sizeof(*mad));
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mad->common.version = 1;
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mad->common.opcode = IBMVFC_PASSTHRU;
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mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
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mad->cmd_ioba.va = (u64)evt->crq.ioba +
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offsetof(struct ibmvfc_passthru_mad, iu);
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mad->cmd_ioba.len = sizeof(mad->iu);
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mad->iu.cmd_len = job->request_payload.payload_len;
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mad->iu.rsp_len = job->reply_payload.payload_len;
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mad->iu.flags = fc_flags;
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mad->iu.cancel_key = IBMVFC_PASSTHRU_CANCEL_KEY;
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mad->iu.cmd.va = sg_dma_address(job->request_payload.sg_list);
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mad->iu.cmd.len = sg_dma_len(job->request_payload.sg_list);
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mad->iu.rsp.va = sg_dma_address(job->reply_payload.sg_list);
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mad->iu.rsp.len = sg_dma_len(job->reply_payload.sg_list);
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mad->iu.scsi_id = port_id;
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mad->iu.tag = (u64)evt;
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rsp_len = mad->iu.rsp.len;
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evt->sync_iu = &rsp_iu;
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init_completion(&evt->comp);
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rc = ibmvfc_send_event(evt, vhost, 0);
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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if (rc) {
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rc = -EIO;
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goto out;
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}
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wait_for_completion(&evt->comp);
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if (rsp_iu.passthru.common.status)
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rc = -EIO;
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else
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job->reply->reply_payload_rcv_len = rsp_len;
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spin_lock_irqsave(vhost->host->host_lock, flags);
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ibmvfc_free_event(evt);
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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job->reply->result = rc;
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job->job_done(job);
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rc = 0;
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out:
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dma_unmap_sg(vhost->dev, job->request_payload.sg_list,
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job->request_payload.sg_cnt, DMA_TO_DEVICE);
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dma_unmap_sg(vhost->dev, job->reply_payload.sg_list,
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job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
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mutex_unlock(&vhost->passthru_mutex);
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LEAVE;
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return rc;
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}
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/**
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* ibmvfc_reset_device - Reset the device with the specified reset type
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* @sdev: scsi device to reset
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@ -3918,6 +4189,8 @@ static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
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rport->supported_classes |= FC_COS_CLASS2;
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if (tgt->service_parms.class3_parms[0] & 0x80000000)
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rport->supported_classes |= FC_COS_CLASS3;
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if (rport->rqst_q)
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blk_queue_max_hw_segments(rport->rqst_q, 1);
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} else
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tgt_dbg(tgt, "rport add failed\n");
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spin_unlock_irqrestore(vhost->host->host_lock, flags);
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@ -4357,6 +4630,7 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
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init_waitqueue_head(&vhost->work_wait_q);
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init_waitqueue_head(&vhost->init_wait_q);
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INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread);
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mutex_init(&vhost->passthru_mutex);
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if ((rc = ibmvfc_alloc_mem(vhost)))
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goto free_scsi_host;
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@ -4389,6 +4663,8 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
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goto remove_shost;
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}
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if (shost_to_fc_host(shost)->rqst_q)
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blk_queue_max_hw_segments(shost_to_fc_host(shost)->rqst_q, 1);
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dev_set_drvdata(dev, vhost);
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spin_lock(&ibmvfc_driver_lock);
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list_add_tail(&vhost->queue, &ibmvfc_head);
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@ -4517,6 +4793,9 @@ static struct fc_function_template ibmvfc_transport_functions = {
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.get_starget_port_id = ibmvfc_get_starget_port_id,
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.show_starget_port_id = 1,
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.bsg_request = ibmvfc_bsg_request,
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.bsg_timeout = ibmvfc_bsg_timeout,
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};
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/**
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@ -58,9 +58,10 @@
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* 1 for ERP
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* 1 for initialization
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* 1 for NPIV Logout
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* 2 for BSG passthru
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* 2 for each discovery thread
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*/
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#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + 1 + (disc_threads * 2))
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#define IBMVFC_NUM_INTERNAL_REQ (1 + 1 + 1 + 2 + (disc_threads * 2))
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#define IBMVFC_MAD_SUCCESS 0x00
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#define IBMVFC_MAD_NOT_SUPPORTED 0xF1
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@ -466,7 +467,10 @@ struct ibmvfc_passthru_iu {
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u16 error;
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u32 flags;
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#define IBMVFC_FC_ELS 0x01
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#define IBMVFC_FC_CT_IU 0x02
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u32 cancel_key;
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#define IBMVFC_PASSTHRU_CANCEL_KEY 0x80000000
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#define IBMVFC_INTERNAL_CANCEL_KEY 0x80000001
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u32 reserved;
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struct srp_direct_buf cmd;
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struct srp_direct_buf rsp;
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@ -693,6 +697,7 @@ struct ibmvfc_host {
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int disc_buf_sz;
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int log_level;
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struct ibmvfc_discover_targets_buf *disc_buf;
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struct mutex passthru_mutex;
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int task_set;
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int init_retries;
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int discovery_threads;
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@ -702,6 +707,7 @@ struct ibmvfc_host {
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int delay_init;
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int scan_complete;
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int logged_in;
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int aborting_passthru;
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int events_to_log;
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#define IBMVFC_AE_LINKUP 0x0001
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#define IBMVFC_AE_LINKDOWN 0x0002
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