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[SCSI] tgt: convert libsrp and ibmvstgt to use srp_transport
This converts libsrp and ibmvstgt to use srp transport. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Acked-by: Brian King <brking@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
FUJITA Tomonori
James Bottomley
parent
62fe88261b
commit
17b0bcfad7
4 changed files with 57 additions and 10 deletions
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@ -848,7 +848,7 @@ config SCSI_IBMVSCSI
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config SCSI_IBMVSCSIS
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tristate "IBM Virtual SCSI Server support"
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depends on PPC_PSERIES && SCSI_TGT && SCSI_SRP
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depends on PPC_PSERIES && SCSI_TGT && SCSI_SRP && SCSI_SRP_ATTRS
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help
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This is the SRP target driver for IBM pSeries virtual environments.
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@ -25,6 +25,7 @@
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#include <linux/module.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport_srp.h>
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#include <scsi/scsi_tgt.h>
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#include <scsi/libsrp.h>
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#include <asm/hvcall.h>
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@ -68,9 +69,12 @@ struct vio_port {
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unsigned long liobn;
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unsigned long riobn;
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struct srp_target *target;
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struct srp_rport *rport;
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};
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static struct workqueue_struct *vtgtd;
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static struct scsi_transport_template *ibmvstgt_transport_template;
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/*
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* These are fixed for the system and come from the Open Firmware device tree.
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@ -188,6 +192,7 @@ static int send_rsp(struct iu_entry *iue, struct scsi_cmnd *sc,
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static void handle_cmd_queue(struct srp_target *target)
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{
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struct Scsi_Host *shost = target->shost;
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struct srp_rport *rport = target_to_port(target)->rport;
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struct iu_entry *iue;
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struct srp_cmd *cmd;
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unsigned long flags;
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@ -200,7 +205,8 @@ retry:
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if (!test_and_set_bit(V_FLYING, &iue->flags)) {
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spin_unlock_irqrestore(&target->lock, flags);
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cmd = iue->sbuf->buf;
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err = srp_cmd_queue(shost, cmd, iue, 0);
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err = srp_cmd_queue(shost, cmd, iue,
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(unsigned long)rport, 0);
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if (err) {
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eprintk("cannot queue cmd %p %d\n", cmd, err);
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srp_iu_put(iue);
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@ -359,6 +365,16 @@ static void process_login(struct iu_entry *iue)
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union viosrp_iu *iu = vio_iu(iue);
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struct srp_login_rsp *rsp = &iu->srp.login_rsp;
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uint64_t tag = iu->srp.rsp.tag;
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struct Scsi_Host *shost = iue->target->shost;
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struct srp_target *target = host_to_srp_target(shost);
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struct vio_port *vport = target_to_port(target);
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struct srp_rport_identifiers ids;
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memset(&ids, 0, sizeof(ids));
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sprintf(ids.port_id, "%x", vport->dma_dev->unit_address);
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ids.roles = SRP_RPORT_ROLE_INITIATOR;
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if (!vport->rport)
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vport->rport = srp_rport_add(shost, &ids);
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/* TODO handle case that requested size is wrong and
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* buffer format is wrong
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@ -412,7 +428,9 @@ static int process_tsk_mgmt(struct iu_entry *iue)
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fn = 0;
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}
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if (fn)
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scsi_tgt_tsk_mgmt_request(iue->target->shost, fn,
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scsi_tgt_tsk_mgmt_request(iue->target->shost,
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(unsigned long)iue->target->shost,
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fn,
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iu->srp.tsk_mgmt.task_tag,
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(struct scsi_lun *) &iu->srp.tsk_mgmt.lun,
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iue);
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@ -721,7 +739,8 @@ static int ibmvstgt_eh_abort_handler(struct scsi_cmnd *sc)
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return 0;
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}
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static int ibmvstgt_tsk_mgmt_response(u64 mid, int result)
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static int ibmvstgt_tsk_mgmt_response(struct Scsi_Host *shost,
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u64 itn_id, u64 mid, int result)
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{
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struct iu_entry *iue = (struct iu_entry *) ((void *) mid);
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union viosrp_iu *iu = vio_iu(iue);
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@ -747,6 +766,20 @@ static int ibmvstgt_tsk_mgmt_response(u64 mid, int result)
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return 0;
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}
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static int ibmvstgt_it_nexus_response(struct Scsi_Host *shost, u64 itn_id,
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int result)
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{
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struct srp_target *target = host_to_srp_target(shost);
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struct vio_port *vport = target_to_port(target);
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if (result) {
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eprintk("%p %d\n", shost, result);
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srp_rport_del(vport->rport);
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vport->rport = NULL;
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}
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return 0;
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}
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static ssize_t system_id_show(struct class_device *cdev, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", system_id);
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@ -804,6 +837,7 @@ static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id)
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shost = scsi_host_alloc(&ibmvstgt_sht, sizeof(struct srp_target));
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if (!shost)
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goto free_vport;
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shost->transportt = ibmvstgt_transport_template;
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err = scsi_tgt_alloc_queue(shost);
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if (err)
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goto put_host;
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@ -837,8 +871,8 @@ static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id)
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err = scsi_add_host(shost, target->dev);
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if (err)
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goto destroy_queue;
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return 0;
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return 0;
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destroy_queue:
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crq_queue_destroy(target);
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free_srp_target:
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@ -857,6 +891,7 @@ static int ibmvstgt_remove(struct vio_dev *dev)
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struct vio_port *vport = target->ldata;
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crq_queue_destroy(target);
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srp_remove_host(shost);
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scsi_remove_host(shost);
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scsi_tgt_free_queue(shost);
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srp_target_free(target);
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@ -909,15 +944,24 @@ static int get_system_info(void)
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return 0;
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}
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static struct srp_function_template ibmvstgt_transport_functions = {
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.it_nexus_response = ibmvstgt_it_nexus_response,
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};
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static int ibmvstgt_init(void)
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{
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int err = -ENOMEM;
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printk("IBM eServer i/pSeries Virtual SCSI Target Driver\n");
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ibmvstgt_transport_template =
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srp_attach_transport(&ibmvstgt_transport_functions);
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if (!ibmvstgt_transport_template)
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return err;
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vtgtd = create_workqueue("ibmvtgtd");
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if (!vtgtd)
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return err;
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goto release_transport;
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err = get_system_info();
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if (err)
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@ -928,9 +972,10 @@ static int ibmvstgt_init(void)
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goto destroy_wq;
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return 0;
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destroy_wq:
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destroy_workqueue(vtgtd);
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release_transport:
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srp_release_transport(ibmvstgt_transport_template);
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return err;
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}
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@ -940,6 +985,7 @@ static void ibmvstgt_exit(void)
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destroy_workqueue(vtgtd);
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vio_unregister_driver(&ibmvstgt_driver);
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srp_release_transport(ibmvstgt_transport_template);
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}
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MODULE_DESCRIPTION("IBM Virtual SCSI Target");
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@ -392,7 +392,7 @@ static int vscsis_data_length(struct srp_cmd *cmd, enum dma_data_direction dir)
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}
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int srp_cmd_queue(struct Scsi_Host *shost, struct srp_cmd *cmd, void *info,
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u64 addr)
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u64 itn_id, u64 addr)
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{
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enum dma_data_direction dir;
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struct scsi_cmnd *sc;
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@ -428,7 +428,8 @@ int srp_cmd_queue(struct Scsi_Host *shost, struct srp_cmd *cmd, void *info,
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sc->request_bufflen = len;
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sc->request_buffer = (void *) (unsigned long) addr;
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sc->tag = tag;
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err = scsi_tgt_queue_command(sc, (struct scsi_lun *) &cmd->lun, cmd->tag);
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err = scsi_tgt_queue_command(sc, itn_id, (struct scsi_lun *)&cmd->lun,
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cmd->tag);
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if (err)
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scsi_host_put_command(shost, sc);
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@ -59,7 +59,7 @@ extern void srp_target_free(struct srp_target *);
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extern struct iu_entry *srp_iu_get(struct srp_target *);
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extern void srp_iu_put(struct iu_entry *);
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extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64);
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extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64, u64);
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extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *,
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srp_rdma_t, int, int);
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