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IB/srp: Introduce srp_alloc_req_data()

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This patch does not change any functionality.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Vu Pham <vu@mellanox.com>
Cc: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Bart Van Assche 2013-10-26 14:38:47 +02:00 committed by Roland Dreier
parent 848b3082db
commit b81d00bddf
1 changed files with 40 additions and 24 deletions
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62
drivers/infiniband/ulp/srp/ib_srp.c
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@ -576,6 +576,42 @@ static void srp_free_req_data(struct srp_target_port *target)
}
}
static int srp_alloc_req_data(struct srp_target_port *target)
{
struct srp_device *srp_dev = target->srp_host->srp_dev;
struct ib_device *ibdev = srp_dev->dev;
struct srp_request *req;
dma_addr_t dma_addr;
int i, ret = -ENOMEM;
INIT_LIST_HEAD(&target->free_reqs);
for (i = 0; i < SRP_CMD_SQ_SIZE; ++i) {
req = &target->req_ring[i];
req->fmr_list = kmalloc(target->cmd_sg_cnt * sizeof(void *),
GFP_KERNEL);
req->map_page = kmalloc(SRP_FMR_SIZE * sizeof(void *),
GFP_KERNEL);
req->indirect_desc = kmalloc(target->indirect_size, GFP_KERNEL);
if (!req->fmr_list || !req->map_page || !req->indirect_desc)
goto out;
dma_addr = ib_dma_map_single(ibdev, req->indirect_desc,
target->indirect_size,
DMA_TO_DEVICE);
if (ib_dma_mapping_error(ibdev, dma_addr))
goto out;
req->indirect_dma_addr = dma_addr;
req->index = i;
list_add_tail(&req->list, &target->free_reqs);
}
ret = 0;
out:
return ret;
}
/**
* srp_del_scsi_host_attr() - Remove attributes defined in the host template.
* @shost: SCSI host whose attributes to remove from sysfs.
@ -2433,8 +2469,7 @@ static ssize_t srp_create_target(struct device *dev,
struct Scsi_Host *target_host;
struct srp_target_port *target;
struct ib_device *ibdev = host->srp_dev->dev;
dma_addr_t dma_addr;
int i, ret;
int ret;
target_host = scsi_host_alloc(&srp_template,
sizeof (struct srp_target_port));
@ -2490,29 +2525,10 @@ static ssize_t srp_create_target(struct device *dev,
INIT_WORK(&target->remove_work, srp_remove_work);
spin_lock_init(&target->lock);
INIT_LIST_HEAD(&target->free_tx);
INIT_LIST_HEAD(&target->free_reqs);
for (i = 0; i < SRP_CMD_SQ_SIZE; ++i) {
struct srp_request *req = &target->req_ring[i];
req->fmr_list = kmalloc(target->cmd_sg_cnt * sizeof (void *),
GFP_KERNEL);
req->map_page = kmalloc(SRP_FMR_SIZE * sizeof (void *),
GFP_KERNEL);
req->indirect_desc = kmalloc(target->indirect_size, GFP_KERNEL);
if (!req->fmr_list || !req->map_page || !req->indirect_desc)
ret = srp_alloc_req_data(target);
if (ret)
goto err_free_mem;
dma_addr = ib_dma_map_single(ibdev, req->indirect_desc,
target->indirect_size,
DMA_TO_DEVICE);
if (ib_dma_mapping_error(ibdev, dma_addr))
goto err_free_mem;
req->indirect_dma_addr = dma_addr;
req->index = i;
list_add_tail(&req->list, &target->free_reqs);
}
ib_query_gid(ibdev, host->port, 0, &target->path.sgid);
shost_printk(KERN_DEBUG, target->scsi_host, PFX