[PATCH 02/11] nvme: consolidate synchronous command submission helpers
Christoph Hellwig
hch at lst.de
Fri May 8 09:00:27 PDT 2015
Note that we keep the unused timeout argument, but allow callers to
pass 0 instead of a timeout if they want the default. This will allow
adding a timeout to the pass through path later on.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/block/nvme-core.c | 96 ++++++++++++++++-------------------------------
drivers/block/nvme-scsi.c | 17 ++++-----
include/linux/nvme.h | 6 +--
3 files changed, 42 insertions(+), 77 deletions(-)
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index 85b8036..247c02a 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -991,27 +991,40 @@ static void sync_completion(struct nvme_queue *nvmeq, void *ctx,
* Returns 0 on success. If the result is negative, it's a Linux error code;
* if the result is positive, it's an NVM Express status code
*/
-static int nvme_submit_sync_cmd(struct request *req, struct nvme_command *cmd,
- u32 *result, unsigned timeout)
+static int __nvme_submit_sync_cmd(struct request_queue *q,
+ struct nvme_command *cmd, u32 *result, unsigned timeout)
{
struct sync_cmd_info cmdinfo;
- struct nvme_cmd_info *cmd_rq = blk_mq_rq_to_pdu(req);
- struct nvme_queue *nvmeq = cmd_rq->nvmeq;
+ struct nvme_cmd_info *cmd_rq;
+ struct request *req;
+ int res;
+
+ req = blk_mq_alloc_request(q, WRITE, GFP_KERNEL, false);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
cmdinfo.task = current;
cmdinfo.status = -EINTR;
cmd->common.command_id = req->tag;
+ cmd_rq = blk_mq_rq_to_pdu(req);
nvme_set_info(cmd_rq, &cmdinfo, sync_completion);
set_current_state(TASK_UNINTERRUPTIBLE);
- nvme_submit_cmd(nvmeq, cmd);
+ nvme_submit_cmd(cmd_rq->nvmeq, cmd);
schedule();
if (result)
*result = cmdinfo.result;
- return cmdinfo.status;
+ res = cmdinfo.status;
+ blk_mq_free_request(req);
+ return res;
+}
+
+int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd)
+{
+ return __nvme_submit_sync_cmd(q, cmd, NULL, 0);
}
static int nvme_submit_async_admin_req(struct nvme_dev *dev)
@@ -1060,41 +1073,6 @@ static int nvme_submit_admin_async_cmd(struct nvme_dev *dev,
return nvme_submit_cmd(nvmeq, cmd);
}
-static int __nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
- u32 *result, unsigned timeout)
-{
- int res;
- struct request *req;
-
- req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_KERNEL, false);
- if (IS_ERR(req))
- return PTR_ERR(req);
- res = nvme_submit_sync_cmd(req, cmd, result, timeout);
- blk_mq_free_request(req);
- return res;
-}
-
-int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
- u32 *result)
-{
- return __nvme_submit_admin_cmd(dev, cmd, result, ADMIN_TIMEOUT);
-}
-
-int nvme_submit_io_cmd(struct nvme_dev *dev, struct nvme_ns *ns,
- struct nvme_command *cmd, u32 *result)
-{
- int res;
- struct request *req;
-
- req = blk_mq_alloc_request(ns->queue, WRITE, (GFP_KERNEL|__GFP_WAIT),
- false);
- if (IS_ERR(req))
- return PTR_ERR(req);
- res = nvme_submit_sync_cmd(req, cmd, result, NVME_IO_TIMEOUT);
- blk_mq_free_request(req);
- return res;
-}
-
static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id)
{
struct nvme_command c;
@@ -1103,7 +1081,7 @@ static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id)
c.delete_queue.opcode = opcode;
c.delete_queue.qid = cpu_to_le16(id);
- return nvme_submit_admin_cmd(dev, &c, NULL);
+ return nvme_submit_sync_cmd(dev->admin_q, &c);
}
static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid,
@@ -1120,7 +1098,7 @@ static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid,
c.create_cq.cq_flags = cpu_to_le16(flags);
c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector);
- return nvme_submit_admin_cmd(dev, &c, NULL);
+ return nvme_submit_sync_cmd(dev->admin_q, &c);
}
static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid,
@@ -1137,7 +1115,7 @@ static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid,
c.create_sq.sq_flags = cpu_to_le16(flags);
c.create_sq.cqid = cpu_to_le16(qid);
- return nvme_submit_admin_cmd(dev, &c, NULL);
+ return nvme_submit_sync_cmd(dev->admin_q, &c);
}
static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid)
@@ -1161,7 +1139,7 @@ int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
c.identify.prp1 = cpu_to_le64(dma_addr);
c.identify.cns = cpu_to_le32(cns);
- return nvme_submit_admin_cmd(dev, &c, NULL);
+ return nvme_submit_sync_cmd(dev->admin_q, &c);
}
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
@@ -1175,7 +1153,7 @@ int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
c.features.prp1 = cpu_to_le64(dma_addr);
c.features.fid = cpu_to_le32(fid);
- return nvme_submit_admin_cmd(dev, &c, result);
+ return __nvme_submit_sync_cmd(dev->admin_q, &c, result, 0);
}
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
@@ -1189,7 +1167,7 @@ int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
c.features.fid = cpu_to_le32(fid);
c.features.dword11 = cpu_to_le32(dword11);
- return nvme_submit_admin_cmd(dev, &c, result);
+ return __nvme_submit_sync_cmd(dev->admin_q, &c, result, 0);
}
/**
@@ -1813,7 +1791,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
c.rw.prp2 = cpu_to_le64(iod->first_dma);
c.rw.metadata = cpu_to_le64(meta_dma);
- status = nvme_submit_io_cmd(dev, ns, &c, NULL);
+ status = nvme_submit_sync_cmd(ns->queue, &c);
unmap:
nvme_unmap_user_pages(dev, write, iod);
nvme_free_iod(dev, iod);
@@ -1869,23 +1847,15 @@ static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns,
timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) :
ADMIN_TIMEOUT;
- if (length != cmd.data_len)
+ if (length != cmd.data_len) {
status = -ENOMEM;
- else if (ns) {
- struct request *req;
-
- req = blk_mq_alloc_request(ns->queue, WRITE,
- (GFP_KERNEL|__GFP_WAIT), false);
- if (IS_ERR(req))
- status = PTR_ERR(req);
- else {
- status = nvme_submit_sync_cmd(req, &c, &cmd.result,
- timeout);
- blk_mq_free_request(req);
- }
- } else
- status = __nvme_submit_admin_cmd(dev, &c, &cmd.result, timeout);
+ goto out;
+ }
+
+ status = __nvme_submit_sync_cmd(ns ? ns->queue : dev->admin_q, &c,
+ &cmd.result, timeout);
+out:
if (cmd.data_len) {
nvme_unmap_user_pages(dev, cmd.opcode & 1, iod);
nvme_free_iod(dev, iod);
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
index aea2498..bc9036a 100644
--- a/drivers/block/nvme-scsi.c
+++ b/drivers/block/nvme-scsi.c
@@ -1053,7 +1053,7 @@ static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
c.common.prp1 = cpu_to_le64(dma_addr);
c.common.cdw10[0] = cpu_to_le32((((sizeof(struct nvme_smart_log) /
BYTES_TO_DWORDS) - 1) << 16) | NVME_LOG_SMART);
- res = nvme_submit_admin_cmd(dev, &c, NULL);
+ res = nvme_submit_sync_cmd(dev->admin_q, &c);
if (res != NVME_SC_SUCCESS) {
temp_c = LOG_TEMP_UNKNOWN;
} else {
@@ -1121,7 +1121,7 @@ static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
c.common.prp1 = cpu_to_le64(dma_addr);
c.common.cdw10[0] = cpu_to_le32((((sizeof(struct nvme_smart_log) /
BYTES_TO_DWORDS) - 1) << 16) | NVME_LOG_SMART);
- res = nvme_submit_admin_cmd(dev, &c, NULL);
+ res = nvme_submit_sync_cmd(dev->admin_q, &c);
if (res != NVME_SC_SUCCESS) {
temp_c_cur = LOG_TEMP_UNKNOWN;
} else {
@@ -1609,7 +1609,7 @@ static int nvme_trans_send_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
c.common.cdw10[0] = cpu_to_le32(cdw10);
}
- nvme_sc = nvme_submit_admin_cmd(dev, &c, NULL);
+ nvme_sc = nvme_submit_sync_cmd(dev->admin_q, &c);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_unmap;
@@ -1971,7 +1971,7 @@ static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
c.format.nsid = cpu_to_le32(ns->ns_id);
c.format.cdw10 = cpu_to_le32(cdw10);
- nvme_sc = nvme_submit_admin_cmd(dev, &c, NULL);
+ nvme_sc = nvme_submit_sync_cmd(dev->admin_q, &c);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
@@ -2139,7 +2139,7 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
nvme_offset += unit_num_blocks;
- nvme_sc = nvme_submit_io_cmd(dev, ns, &c, NULL);
+ nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
if (nvme_sc != NVME_SC_SUCCESS) {
nvme_unmap_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
@@ -2697,7 +2697,7 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
c.common.opcode = nvme_cmd_flush;
c.common.nsid = cpu_to_le32(ns->ns_id);
- nvme_sc = nvme_submit_io_cmd(ns->dev, ns, &c, NULL);
+ nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out;
@@ -2725,8 +2725,7 @@ static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
c.common.opcode = nvme_cmd_flush;
c.common.nsid = cpu_to_le32(ns->ns_id);
- nvme_sc = nvme_submit_io_cmd(ns->dev, ns, &c, NULL);
-
+ nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out;
@@ -2933,7 +2932,7 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
c.dsm.nr = cpu_to_le32(ndesc - 1);
c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
- nvme_sc = nvme_submit_io_cmd(dev, ns, &c, NULL);
+ nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
res = nvme_trans_status_code(hdr, nvme_sc);
dma_free_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 8dbd05e..61488b2 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -158,11 +158,7 @@ struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
unsigned long addr, unsigned length);
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
struct nvme_iod *iod);
-int nvme_submit_io_cmd(struct nvme_dev *, struct nvme_ns *,
- struct nvme_command *, u32 *);
-int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns);
-int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *,
- u32 *result);
+int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd);
int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns,
dma_addr_t dma_addr);
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
--
1.9.1
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