static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_target_port *target,
struct srp_request *req)
{
+ struct scatterlist *scat;
struct srp_cmd *cmd = req->cmd->buf;
- int len;
+ int len, nents, count;
+ int i;
u8 fmt;
if (!scmnd->request_buffer || scmnd->sc_data_direction == DMA_NONE)
return -EINVAL;
}
- if (scmnd->use_sg) {
- struct scatterlist *scat = scmnd->request_buffer;
- int n;
- int i;
-
- n = dma_map_sg(target->srp_host->dev->dma_device,
- scat, scmnd->use_sg, scmnd->sc_data_direction);
+ /*
+ * This handling of non-SG commands can be killed when the
+ * SCSI midlayer no longer generates non-SG commands.
+ */
+ if (likely(scmnd->use_sg)) {
+ nents = scmnd->use_sg;
+ scat = scmnd->request_buffer;
+ } else {
+ nents = 1;
+ scat = &req->fake_sg;
+ sg_init_one(scat, scmnd->request_buffer, scmnd->request_bufflen);
+ }
- if (n == 1) {
- struct srp_direct_buf *buf = (void *) cmd->add_data;
+ count = dma_map_sg(target->srp_host->dev->dma_device, scat, nents,
+ scmnd->sc_data_direction);
- fmt = SRP_DATA_DESC_DIRECT;
+ if (count == 1) {
+ struct srp_direct_buf *buf = (void *) cmd->add_data;
- buf->va = cpu_to_be64(sg_dma_address(scat));
- buf->key = cpu_to_be32(target->srp_host->mr->rkey);
- buf->len = cpu_to_be32(sg_dma_len(scat));
+ fmt = SRP_DATA_DESC_DIRECT;
- len = sizeof (struct srp_cmd) +
- sizeof (struct srp_direct_buf);
- } else {
- struct srp_indirect_buf *buf = (void *) cmd->add_data;
- u32 datalen = 0;
+ buf->va = cpu_to_be64(sg_dma_address(scat));
+ buf->key = cpu_to_be32(target->srp_host->mr->rkey);
+ buf->len = cpu_to_be32(sg_dma_len(scat));
- fmt = SRP_DATA_DESC_INDIRECT;
+ len = sizeof (struct srp_cmd) +
+ sizeof (struct srp_direct_buf);
+ } else {
+ struct srp_indirect_buf *buf = (void *) cmd->add_data;
+ u32 datalen = 0;
- if (scmnd->sc_data_direction == DMA_TO_DEVICE)
- cmd->data_out_desc_cnt = n;
- else
- cmd->data_in_desc_cnt = n;
+ fmt = SRP_DATA_DESC_INDIRECT;
- buf->table_desc.va = cpu_to_be64(req->cmd->dma +
- sizeof *cmd +
- sizeof *buf);
- buf->table_desc.key =
+ if (scmnd->sc_data_direction == DMA_TO_DEVICE)
+ cmd->data_out_desc_cnt = count;
+ else
+ cmd->data_in_desc_cnt = count;
+
+ buf->table_desc.va = cpu_to_be64(req->cmd->dma +
+ sizeof *cmd +
+ sizeof *buf);
+ buf->table_desc.key =
+ cpu_to_be32(target->srp_host->mr->rkey);
+ buf->table_desc.len =
+ cpu_to_be32(count * sizeof (struct srp_direct_buf));
+
+ for (i = 0; i < count; ++i) {
+ buf->desc_list[i].va = cpu_to_be64(sg_dma_address(&scat[i]));
+ buf->desc_list[i].key =
cpu_to_be32(target->srp_host->mr->rkey);
- buf->table_desc.len =
- cpu_to_be32(n * sizeof (struct srp_direct_buf));
+ buf->desc_list[i].len = cpu_to_be32(sg_dma_len(&scat[i]));
- for (i = 0; i < n; ++i) {
- buf->desc_list[i].va = cpu_to_be64(sg_dma_address(&scat[i]));
- buf->desc_list[i].key =
- cpu_to_be32(target->srp_host->mr->rkey);
- buf->desc_list[i].len = cpu_to_be32(sg_dma_len(&scat[i]));
-
- datalen += sg_dma_len(&scat[i]);
- }
-
- buf->len = cpu_to_be32(datalen);
-
- len = sizeof (struct srp_cmd) +
- sizeof (struct srp_indirect_buf) +
- n * sizeof (struct srp_direct_buf);
- }
- } else {
- struct srp_direct_buf *buf = (void *) cmd->add_data;
- dma_addr_t dma;
-
- dma = dma_map_single(target->srp_host->dev->dma_device,
- scmnd->request_buffer, scmnd->request_bufflen,
- scmnd->sc_data_direction);
- if (dma_mapping_error(dma)) {
- printk(KERN_WARNING PFX "unable to map %p/%d (dir %d)\n",
- scmnd->request_buffer, (int) scmnd->request_bufflen,
- scmnd->sc_data_direction);
- return -EINVAL;
+ datalen += sg_dma_len(&scat[i]);
}
- pci_unmap_addr_set(req, direct_mapping, dma);
-
- buf->va = cpu_to_be64(dma);
- buf->key = cpu_to_be32(target->srp_host->mr->rkey);
- buf->len = cpu_to_be32(scmnd->request_bufflen);
-
- fmt = SRP_DATA_DESC_DIRECT;
+ buf->len = cpu_to_be32(datalen);
- len = sizeof (struct srp_cmd) + sizeof (struct srp_direct_buf);
+ len = sizeof (struct srp_cmd) +
+ sizeof (struct srp_indirect_buf) +
+ count * sizeof (struct srp_direct_buf);
}
if (scmnd->sc_data_direction == DMA_TO_DEVICE)
else
cmd->buf_fmt = fmt;
-
return len;
}
struct srp_target_port *target,
struct srp_request *req)
{
+ struct scatterlist *scat;
+ int nents;
+
if (!scmnd->request_buffer ||
(scmnd->sc_data_direction != DMA_TO_DEVICE &&
scmnd->sc_data_direction != DMA_FROM_DEVICE))
- return;
+ return;
- if (scmnd->use_sg)
- dma_unmap_sg(target->srp_host->dev->dma_device,
- (struct scatterlist *) scmnd->request_buffer,
- scmnd->use_sg, scmnd->sc_data_direction);
- else
- dma_unmap_single(target->srp_host->dev->dma_device,
- pci_unmap_addr(req, direct_mapping),
- scmnd->request_bufflen,
- scmnd->sc_data_direction);
+ /*
+ * This handling of non-SG commands can be killed when the
+ * SCSI midlayer no longer generates non-SG commands.
+ */
+ if (likely(scmnd->use_sg)) {
+ nents = scmnd->use_sg;
+ scat = (struct scatterlist *) scmnd->request_buffer;
+ } else {
+ nents = 1;
+ scat = (struct scatterlist *) scmnd->request_buffer;
+ }
+
+ dma_unmap_sg(target->srp_host->dev->dma_device, scat, nents,
+ scmnd->sc_data_direction);
}
static void srp_process_rsp(struct srp_target_port *target, struct srp_rsp *rsp)
spin_lock_irq(target->scsi_host->host_lock);
+ if (target->state == SRP_TARGET_DEAD ||
+ target->state == SRP_TARGET_REMOVED) {
+ scmnd->result = DID_BAD_TARGET << 16;
+ goto out;
+ }
+
if (scmnd->host_scribble == (void *) -1L)
goto out;
return ret;
}
+static ssize_t show_id_ext(struct class_device *cdev, char *buf)
+{
+ struct srp_target_port *target = host_to_target(class_to_shost(cdev));
+
+ if (target->state == SRP_TARGET_DEAD ||
+ target->state == SRP_TARGET_REMOVED)
+ return -ENODEV;
+
+ return sprintf(buf, "0x%016llx\n",
+ (unsigned long long) be64_to_cpu(target->id_ext));
+}
+
+static ssize_t show_ioc_guid(struct class_device *cdev, char *buf)
+{
+ struct srp_target_port *target = host_to_target(class_to_shost(cdev));
+
+ if (target->state == SRP_TARGET_DEAD ||
+ target->state == SRP_TARGET_REMOVED)
+ return -ENODEV;
+
+ return sprintf(buf, "0x%016llx\n",
+ (unsigned long long) be64_to_cpu(target->ioc_guid));
+}
+
+static ssize_t show_service_id(struct class_device *cdev, char *buf)
+{
+ struct srp_target_port *target = host_to_target(class_to_shost(cdev));
+
+ if (target->state == SRP_TARGET_DEAD ||
+ target->state == SRP_TARGET_REMOVED)
+ return -ENODEV;
+
+ return sprintf(buf, "0x%016llx\n",
+ (unsigned long long) be64_to_cpu(target->service_id));
+}
+
+static ssize_t show_pkey(struct class_device *cdev, char *buf)
+{
+ struct srp_target_port *target = host_to_target(class_to_shost(cdev));
+
+ if (target->state == SRP_TARGET_DEAD ||
+ target->state == SRP_TARGET_REMOVED)
+ return -ENODEV;
+
+ return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey));
+}
+
+static ssize_t show_dgid(struct class_device *cdev, char *buf)
+{
+ struct srp_target_port *target = host_to_target(class_to_shost(cdev));
+
+ if (target->state == SRP_TARGET_DEAD ||
+ target->state == SRP_TARGET_REMOVED)
+ return -ENODEV;
+
+ return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]),
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]),
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]),
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]),
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]),
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]),
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]),
+ be16_to_cpu(((__be16 *) target->path.dgid.raw)[7]));
+}
+
+static CLASS_DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL);
+static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL);
+static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL);
+static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
+static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL);
+
+static struct class_device_attribute *srp_host_attrs[] = {
+ &class_device_attr_id_ext,
+ &class_device_attr_ioc_guid,
+ &class_device_attr_service_id,
+ &class_device_attr_pkey,
+ &class_device_attr_dgid,
+ NULL
+};
+
static struct scsi_host_template srp_template = {
.module = THIS_MODULE,
.name = DRV_NAME,
.this_id = -1,
.sg_tablesize = SRP_MAX_INDIRECT,
.cmd_per_lun = SRP_SQ_SIZE,
- .use_clustering = ENABLE_CLUSTERING
+ .use_clustering = ENABLE_CLUSTERING,
+ .shost_attrs = srp_host_attrs
};
static int srp_add_target(struct srp_host *host, struct srp_target_port *target)
strlcpy(dgid, p + i * 2, 3);
target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16);
}
+ kfree(p);
break;
case SRP_OPT_PKEY:
git.samba.org / sfrench / cifs-2.6.git / blobdiff