Use the sgl_alloc() and sgl_free() functions instead of open coding
these functions.
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxx>
Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Sagi Grimberg <sagi@xxxxxxxxxxx>
---
drivers/nvme/target/Kconfig | 1 +
drivers/nvme/target/rdma.c | 63 +++------------------------------------------
2 files changed, 5 insertions(+), 59 deletions(-)
diff --git a/drivers/nvme/target/Kconfig b/drivers/nvme/target/Kconfig
index 4d9715630e21..5f4f8b16685f 100644
--- a/drivers/nvme/target/Kconfig
+++ b/drivers/nvme/target/Kconfig
@@ -29,6 +29,7 @@ config NVME_TARGET_RDMA
tristate "NVMe over Fabrics RDMA target support"
depends on INFINIBAND
depends on NVME_TARGET
+ select SGL_ALLOC
help
This enables the NVMe RDMA target support, which allows exporting NVMe
devices over RDMA.
diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c
index 49912909c298..0e4c15754c58 100644
--- a/drivers/nvme/target/rdma.c
+++ b/drivers/nvme/target/rdma.c
@@ -185,59 +185,6 @@ nvmet_rdma_put_rsp(struct nvmet_rdma_rsp *rsp)
spin_unlock_irqrestore(&rsp->queue->rsps_lock, flags);
}
-static void nvmet_rdma_free_sgl(struct scatterlist *sgl, unsigned int nents)
-{
- struct scatterlist *sg;
- int count;
-
- if (!sgl || !nents)
- return;
-
- for_each_sg(sgl, sg, nents, count)
- __free_page(sg_page(sg));
- kfree(sgl);
-}
-
-static int nvmet_rdma_alloc_sgl(struct scatterlist **sgl, unsigned int *nents,
- u32 length)
-{
- struct scatterlist *sg;
- struct page *page;
- unsigned int nent;
- int i = 0;
-
- nent = DIV_ROUND_UP(length, PAGE_SIZE);
- sg = kmalloc_array(nent, sizeof(struct scatterlist), GFP_KERNEL);
- if (!sg)
- goto out;
-
- sg_init_table(sg, nent);
-
- while (length) {
- u32 page_len = min_t(u32, length, PAGE_SIZE);
-
- page = alloc_page(GFP_KERNEL);
- if (!page)
- goto out_free_pages;
-
- sg_set_page(&sg[i], page, page_len, 0);
- length -= page_len;
- i++;
- }
- *sgl = sg;
- *nents = nent;
- return 0;
-
-out_free_pages:
- while (i > 0) {
- i--;
- __free_page(sg_page(&sg[i]));
- }
- kfree(sg);
-out:
- return NVME_SC_INTERNAL;
-}
-
static int nvmet_rdma_alloc_cmd(struct nvmet_rdma_device *ndev,
struct nvmet_rdma_cmd *c, bool admin)
{
@@ -484,7 +431,7 @@ static void nvmet_rdma_release_rsp(struct nvmet_rdma_rsp *rsp)
}
if (rsp->req.sg != &rsp->cmd->inline_sg)
- nvmet_rdma_free_sgl(rsp->req.sg, rsp->req.sg_cnt);
+ sgl_free(rsp->req.sg);
if (unlikely(!list_empty_careful(&queue->rsp_wr_wait_list)))
nvmet_rdma_process_wr_wait_list(queue);
@@ -621,16 +568,14 @@ static u16 nvmet_rdma_map_sgl_keyed(struct nvmet_rdma_rsp *rsp,
u32 len = get_unaligned_le24(sgl->length);
u32 key = get_unaligned_le32(sgl->key);
int ret;
- u16 status;
/* no data command? */
if (!len)
return 0;
- status = nvmet_rdma_alloc_sgl(&rsp->req.sg, &rsp->req.sg_cnt,
- len);
- if (status)
- return status;
+ rsp->req.sg = sgl_alloc(len, GFP_KERNEL, &rsp->req.sg_cnt);
+ if (!rsp->req.sg)
+ return NVME_SC_INTERNAL;
ret = rdma_rw_ctx_init(&rsp->rw, cm_id->qp, cm_id->port_num,
rsp->req.sg, rsp->req.sg_cnt, 0, addr, key,
--
2.15.1
