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Date: Fri, 5 Jun 2015 14:54:23 +0200
From: Matias Bjørling <m@...rling.me>
To: hch@...radead.org, axboe@...com, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org
Cc: javier@...htnvm.io, Stephen.Bates@...s.com, keith.busch@...el.com,
Matias Bjørling <m@...rling.me>
Subject: [PATCH v4 1/8] nvme: add special param for nvme_submit_sync_cmd
In preparation for LightNVM, it requires a hook for internal commands
to resolve its state on command completion. Use req->special for this
and move the command result to req->sense.
Signed-off-by: Matias Bjørling <m@...rling.me>
---
drivers/block/nvme-core.c | 19 ++++++++++---------
drivers/block/nvme-scsi.c | 4 ++--
include/linux/nvme.h | 2 +-
3 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index 6ed1356..d2955fe 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -614,7 +614,7 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
req->errors = 0;
if (req->cmd_type == REQ_TYPE_DRV_PRIV) {
u32 result = le32_to_cpup(&cqe->result);
- req->special = (void *)(uintptr_t)result;
+ req->sense = (void *)(uintptr_t)result;
}
if (cmd_rq->aborted)
@@ -998,7 +998,7 @@ static irqreturn_t nvme_irq_check(int irq, void *data)
*/
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buffer, void __user *ubuffer, unsigned bufflen,
- u32 *result, unsigned timeout)
+ u32 *result, unsigned timeout, void *special)
{
bool write = cmd->common.opcode & 1;
struct bio *bio = NULL;
@@ -1019,7 +1019,7 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
req->cmd = (unsigned char *)cmd;
req->cmd_len = sizeof(struct nvme_command);
- req->special = (void *)0;
+ req->special = special;
if (buffer && bufflen) {
ret = blk_rq_map_kern(q, req, buffer, bufflen, __GFP_WAIT);
@@ -1036,7 +1036,7 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
if (bio)
blk_rq_unmap_user(bio);
if (result)
- *result = (u32)(uintptr_t)req->special;
+ *result = (u32)(uintptr_t)req->sense;
ret = req->errors;
out:
blk_mq_free_request(req);
@@ -1046,7 +1046,8 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buffer, unsigned bufflen)
{
- return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0);
+ return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0,
+ NULL);
}
static int nvme_submit_async_admin_req(struct nvme_dev *dev)
@@ -1209,7 +1210,7 @@ int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
c.features.fid = cpu_to_le32(fid);
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
- result, 0);
+ result, 0, NULL);
}
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
@@ -1224,7 +1225,7 @@ int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
c.features.dword11 = cpu_to_le32(dword11);
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
- result, 0);
+ result, 0, NULL);
}
int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log)
@@ -1787,7 +1788,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
c.rw.metadata = cpu_to_le64(meta_dma);
status = __nvme_submit_sync_cmd(ns->queue, &c, NULL,
- (void __user *)io.addr, length, NULL, 0);
+ (void __user *)io.addr, length, NULL, 0, NULL);
unmap:
if (meta) {
if (status == NVME_SC_SUCCESS && !write) {
@@ -1831,7 +1832,7 @@ static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns,
status = __nvme_submit_sync_cmd(ns ? ns->queue : dev->admin_q, &c,
NULL, (void __user *)cmd.addr, cmd.data_len,
- &cmd.result, timeout);
+ &cmd.result, timeout, NULL);
if (status >= 0) {
if (put_user(cmd.result, &ucmd->result))
return -EFAULT;
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
index 8e6223e..ad35bb7 100644
--- a/drivers/block/nvme-scsi.c
+++ b/drivers/block/nvme-scsi.c
@@ -1297,7 +1297,7 @@ static int nvme_trans_send_download_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr
c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
nvme_sc = __nvme_submit_sync_cmd(dev->admin_q, &c, NULL,
- hdr->dxferp, tot_len, NULL, 0);
+ hdr->dxferp, tot_len, NULL, 0, NULL);
return nvme_trans_status_code(hdr, nvme_sc);
}
@@ -1704,7 +1704,7 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
break;
}
nvme_sc = __nvme_submit_sync_cmd(ns->queue, &c, NULL,
- next_mapping_addr, unit_len, NULL, 0);
+ next_mapping_addr, unit_len, NULL, 0, NULL);
if (nvme_sc)
break;
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 986bf8a..fce2090 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -150,7 +150,7 @@ int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buf, unsigned bufflen);
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buffer, void __user *ubuffer, unsigned bufflen,
- u32 *result, unsigned timeout);
+ u32 *result, unsigned timeout, void *special);
int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id);
int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid,
struct nvme_id_ns **id);
--
2.1.4
--
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