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nvme: submit internal commands through the block layer 

Use block layer queues with an internal cmd_type to submit internally
generated NVMe commands.  This both simplifies the code a lot and allow
for a better structure.  For example now the LighNVM code can construct
commands without knowing the details of the underlying I/O descriptors.
Or a future NVMe over network target could inject commands, as well as
could the SCSI translation and ioctl code be reused for such a beast.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
hifive-unleashed-5.1
Christoph Hellwig 2015-05-22 11:12:46 +02:00 committed by Jens Axboe
parent 772ce43559
commit d29ec8241c
3 changed files with 300 additions and 545 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

399
drivers/block/nvme-core.c
View File

@ -445,7 +445,7 @@ static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev,
(unsigned long) rq, gfp);
}
void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
{
const int last_prp = dev->page_size / 8 - 1;
int i;
@ -605,7 +605,12 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
spin_unlock_irqrestore(req->q->queue_lock, flags);
return;
}
req->errors = nvme_error_status(status);
if (req->cmd_type == REQ_TYPE_DRV_PRIV) {
req->sense_len = le32_to_cpup(&cqe->result);
req->errors = status;
} else {
req->errors = nvme_error_status(status);
}
} else
req->errors = 0;
@ -630,8 +635,8 @@ static void req_completion(struct nvme_queue *nvmeq, void *ctx,
}
/* length is in bytes. gfp flags indicates whether we may sleep. */
int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, int total_len,
gfp_t gfp)
static int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod,
int total_len, gfp_t gfp)
{
struct dma_pool *pool;
int length = total_len;
@ -709,6 +714,23 @@ int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, int total_len,
return total_len;
}
static void nvme_submit_priv(struct nvme_queue *nvmeq, struct request *req,
struct nvme_iod *iod)
{
struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail];
memcpy(cmnd, req->cmd, sizeof(struct nvme_command));
cmnd->rw.command_id = req->tag;
if (req->nr_phys_segments) {
cmnd->rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
cmnd->rw.prp2 = cpu_to_le64(iod->first_dma);
}
if (++nvmeq->sq_tail == nvmeq->q_depth)
nvmeq->sq_tail = 0;
writel(nvmeq->sq_tail, nvmeq->q_db);
}
/*
* We reuse the small pool to allocate the 16-byte range here as it is not
* worth having a special pool for these or additional cases to handle freeing
@ -807,11 +829,15 @@ static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod,
return 0;
}
/*
* NOTE: ns is NULL when called on the admin queue.
*/
static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct nvme_ns *ns = hctx->queue->queuedata;
struct nvme_queue *nvmeq = hctx->driver_data;
struct nvme_dev *dev = nvmeq->dev;
struct request *req = bd->rq;
struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(req);
struct nvme_iod *iod;
@ -822,7 +848,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
* unless this namespace is formated such that the metadata can be
* stripped/generated by the controller with PRACT=1.
*/
if (ns->ms && !blk_integrity_rq(req)) {
if (ns && ns->ms && !blk_integrity_rq(req)) {
if (!(ns->pi_type && ns->ms == 8)) {
req->errors = -EFAULT;
blk_mq_complete_request(req);
@ -830,7 +856,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
}
}
iod = nvme_alloc_iod(req, ns->dev, GFP_ATOMIC);
iod = nvme_alloc_iod(req, dev, GFP_ATOMIC);
if (!iod)
return BLK_MQ_RQ_QUEUE_BUSY;
@ -841,8 +867,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
* as it is not worth having a special pool for these or
* additional cases to handle freeing the iod.
*/
range = dma_pool_alloc(nvmeq->dev->prp_small_pool,
GFP_ATOMIC,
range = dma_pool_alloc(dev->prp_small_pool, GFP_ATOMIC,
&iod->first_dma);
if (!range)
goto retry_cmd;
@ -860,9 +885,8 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
goto retry_cmd;
if (blk_rq_bytes(req) !=
nvme_setup_prps(nvmeq->dev, iod, blk_rq_bytes(req), GFP_ATOMIC)) {
dma_unmap_sg(nvmeq->dev->dev, iod->sg,
iod->nents, dma_dir);
nvme_setup_prps(dev, iod, blk_rq_bytes(req), GFP_ATOMIC)) {
dma_unmap_sg(dev->dev, iod->sg, iod->nents, dma_dir);
goto retry_cmd;
}
if (blk_integrity_rq(req)) {
@ -884,7 +908,9 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
nvme_set_info(cmd, iod, req_completion);
spin_lock_irq(&nvmeq->q_lock);
if (req->cmd_flags & REQ_DISCARD)
if (req->cmd_type == REQ_TYPE_DRV_PRIV)
nvme_submit_priv(nvmeq, req, iod);
else if (req->cmd_flags & REQ_DISCARD)
nvme_submit_discard(nvmeq, ns, req, iod);
else if (req->cmd_flags & REQ_FLUSH)
nvme_submit_flush(nvmeq, ns, req->tag);
@ -896,10 +922,10 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
return BLK_MQ_RQ_QUEUE_OK;
error_cmd:
nvme_free_iod(nvmeq->dev, iod);
nvme_free_iod(dev, iod);
return BLK_MQ_RQ_QUEUE_ERROR;
retry_cmd:
nvme_free_iod(nvmeq->dev, iod);
nvme_free_iod(dev, iod);
return BLK_MQ_RQ_QUEUE_BUSY;
}
@ -942,15 +968,6 @@ static int nvme_process_cq(struct nvme_queue *nvmeq)
return 1;
}
/* Admin queue isn't initialized as a request queue. If at some point this
* happens anyway, make sure to notify the user */
static int nvme_admin_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
WARN_ON_ONCE(1);
return BLK_MQ_RQ_QUEUE_ERROR;
}
static irqreturn_t nvme_irq(int irq, void *data)
{
irqreturn_t result;
@ -972,59 +989,61 @@ static irqreturn_t nvme_irq_check(int irq, void *data)
return IRQ_WAKE_THREAD;
}
struct sync_cmd_info {
struct task_struct *task;
u32 result;
int status;
};
static void sync_completion(struct nvme_queue *nvmeq, void *ctx,
struct nvme_completion *cqe)
{
struct sync_cmd_info *cmdinfo = ctx;
cmdinfo->result = le32_to_cpup(&cqe->result);
cmdinfo->status = le16_to_cpup(&cqe->status) >> 1;
wake_up_process(cmdinfo->task);
}
/*
* 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_queue *q,
struct nvme_command *cmd, u32 *result, unsigned timeout)
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buffer, void __user *ubuffer, unsigned bufflen,
u32 *result, unsigned timeout)
{
struct sync_cmd_info cmdinfo;
struct nvme_cmd_info *cmd_rq;
bool write = cmd->common.opcode & 1;
struct bio *bio = NULL;
struct request *req;
int res;
int ret;
req = blk_mq_alloc_request(q, WRITE, GFP_KERNEL, false);
req = blk_mq_alloc_request(q, write, GFP_KERNEL, false);
if (IS_ERR(req))
return PTR_ERR(req);
cmdinfo.task = current;
cmdinfo.status = -EINTR;
req->cmd_type = REQ_TYPE_DRV_PRIV;
req->__data_len = 0;
req->__sector = (sector_t) -1;
req->bio = req->biotail = NULL;
cmd->common.command_id = req->tag;
req->timeout = ADMIN_TIMEOUT;
cmd_rq = blk_mq_rq_to_pdu(req);
nvme_set_info(cmd_rq, &cmdinfo, sync_completion);
req->cmd = (unsigned char *)cmd;
req->cmd_len = sizeof(struct nvme_command);
req->sense = NULL;
req->sense_len = 0;
set_current_state(TASK_UNINTERRUPTIBLE);
nvme_submit_cmd(cmd_rq->nvmeq, cmd);
schedule();
if (buffer && bufflen) {
ret = blk_rq_map_kern(q, req, buffer, bufflen, __GFP_WAIT);
if (ret)
goto out;
} else if (ubuffer && bufflen) {
ret = blk_rq_map_user(q, req, NULL, ubuffer, bufflen, __GFP_WAIT);
if (ret)
goto out;
bio = req->bio;
}
blk_execute_rq(req->q, NULL, req, 0);
if (bio)
blk_rq_unmap_user(bio);
if (result)
*result = cmdinfo.result;
res = cmdinfo.status;
*result = req->sense_len;
ret = req->errors;
out:
blk_mq_free_request(req);
return res;
return ret;
}
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, NULL, 0);
return __nvme_submit_sync_cmd(q, cmd, buffer, NULL, bufflen, NULL, 0);
}
static int nvme_submit_async_admin_req(struct nvme_dev *dev)
@ -1081,7 +1100,7 @@ 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_sync_cmd(dev->admin_q, &c);
return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0);
}
static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid,
@ -1090,6 +1109,10 @@ static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid,
struct nvme_command c;
int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED;
/*
* Note: we (ab)use the fact the the prp fields survive if no data
* is attached to the request.
*/
memset(&c, 0, sizeof(c));
c.create_cq.opcode = nvme_admin_create_cq;
c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr);
@ -1098,7 +1121,7 @@ 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_sync_cmd(dev->admin_q, &c);
return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0);
}
static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid,
@ -1107,6 +1130,10 @@ static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid,
struct nvme_command c;
int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM;
/*
* Note: we (ab)use the fact the the prp fields survive if no data
* is attached to the request.
*/
memset(&c, 0, sizeof(c));
c.create_sq.opcode = nvme_admin_create_sq;
c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr);
@ -1115,7 +1142,7 @@ 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_sync_cmd(dev->admin_q, &c);
return nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0);
}
static int adapter_delete_cq(struct nvme_dev *dev, u16 cqid)
@ -1128,18 +1155,43 @@ static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid)
return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid);
}
int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
dma_addr_t dma_addr)
int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id)
{
struct nvme_command c;
struct nvme_command c = {
.identify.opcode = nvme_admin_identify,
.identify.cns = cpu_to_le32(1),
};
int error;
memset(&c, 0, sizeof(c));
c.identify.opcode = nvme_admin_identify;
c.identify.nsid = cpu_to_le32(nsid);
c.identify.prp1 = cpu_to_le64(dma_addr);
c.identify.cns = cpu_to_le32(cns);
*id = kmalloc(sizeof(struct nvme_id_ctrl), GFP_KERNEL);
if (!*id)
return -ENOMEM;
return nvme_submit_sync_cmd(dev->admin_q, &c);
error = nvme_submit_sync_cmd(dev->admin_q, &c, *id,
sizeof(struct nvme_id_ctrl));
if (error)
kfree(*id);
return error;
}
int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid,
struct nvme_id_ns **id)
{
struct nvme_command c = {
.identify.opcode = nvme_admin_identify,
.identify.nsid = cpu_to_le32(nsid),
};
int error;
*id = kmalloc(sizeof(struct nvme_id_ns), GFP_KERNEL);
if (!*id)
return -ENOMEM;
error = nvme_submit_sync_cmd(dev->admin_q, &c, *id,
sizeof(struct nvme_id_ns));
if (error)
kfree(*id);
return error;
}
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
@ -1153,7 +1205,8 @@ 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_sync_cmd(dev->admin_q, &c, result, 0);
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
result, 0);
}
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
@ -1167,7 +1220,30 @@ 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_sync_cmd(dev->admin_q, &c, result, 0);
return __nvme_submit_sync_cmd(dev->admin_q, &c, NULL, NULL, 0,
result, 0);
}
int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log)
{
struct nvme_command c = {
.common.opcode = nvme_admin_get_log_page,
.common.nsid = cpu_to_le32(0xFFFFFFFF),
.common.cdw10[0] = cpu_to_le32(
(((sizeof(struct nvme_smart_log) / 4) - 1) << 16) |
NVME_LOG_SMART),
};
int error;
*log = kmalloc(sizeof(struct nvme_smart_log), GFP_KERNEL);
if (!*log)
return -ENOMEM;
error = nvme_submit_sync_cmd(dev->admin_q, &c, *log,
sizeof(struct nvme_smart_log));
if (error)
kfree(*log);
return error;
}
/**
@ -1523,7 +1599,7 @@ static int nvme_shutdown_ctrl(struct nvme_dev *dev)
}
static struct blk_mq_ops nvme_mq_admin_ops = {
.queue_rq = nvme_admin_queue_rq,
.queue_rq = nvme_queue_rq,
.map_queue = blk_mq_map_queue,
.init_hctx = nvme_admin_init_hctx,
.exit_hctx = nvme_exit_hctx,
@ -1644,122 +1720,41 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
return result;
}
struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
unsigned long addr, unsigned length)
{
int i, err, count, nents, offset;
struct scatterlist *sg;
struct page **pages;
struct nvme_iod *iod;
if (addr & 3)
return ERR_PTR(-EINVAL);
if (!length || length > INT_MAX - PAGE_SIZE)
return ERR_PTR(-EINVAL);
offset = offset_in_page(addr);
count = DIV_ROUND_UP(offset + length, PAGE_SIZE);
pages = kcalloc(count, sizeof(*pages), GFP_KERNEL);
if (!pages)
return ERR_PTR(-ENOMEM);
err = get_user_pages_fast(addr, count, 1, pages);
if (err < count) {
count = err;
err = -EFAULT;
goto put_pages;
}
err = -ENOMEM;
iod = __nvme_alloc_iod(count, length, dev, 0, GFP_KERNEL);
if (!iod)
goto put_pages;
sg = iod->sg;
sg_init_table(sg, count);
for (i = 0; i < count; i++) {
sg_set_page(&sg[i], pages[i],
min_t(unsigned, length, PAGE_SIZE - offset),
offset);
length -= (PAGE_SIZE - offset);
offset = 0;
}
sg_mark_end(&sg[i - 1]);
iod->nents = count;
nents = dma_map_sg(dev->dev, sg, count,
write ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
if (!nents)
goto free_iod;
kfree(pages);
return iod;
free_iod:
kfree(iod);
put_pages:
for (i = 0; i < count; i++)
put_page(pages[i]);
kfree(pages);
return ERR_PTR(err);
}
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
struct nvme_iod *iod)
{
int i;
dma_unmap_sg(dev->dev, iod->sg, iod->nents,
write ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
for (i = 0; i < iod->nents; i++)
put_page(sg_page(&iod->sg[i]));
}
static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
{
struct nvme_dev *dev = ns->dev;
struct nvme_user_io io;
struct nvme_command c;
unsigned length, meta_len, prp_len;
unsigned length, meta_len;
int status, write;
struct nvme_iod *iod;
dma_addr_t meta_dma = 0;
void *meta = NULL;
if (copy_from_user(&io, uio, sizeof(io)))
return -EFAULT;
length = (io.nblocks + 1) << ns->lba_shift;
meta_len = (io.nblocks + 1) * ns->ms;
if (meta_len && ((io.metadata & 3) || !io.metadata) && !ns->ext)
return -EINVAL;
else if (meta_len && ns->ext) {
length += meta_len;
meta_len = 0;
}
write = io.opcode & 1;
switch (io.opcode) {
case nvme_cmd_write:
case nvme_cmd_read:
case nvme_cmd_compare:
iod = nvme_map_user_pages(dev, write, io.addr, length);
break;
default:
return -EINVAL;
}
if (IS_ERR(iod))
return PTR_ERR(iod);
length = (io.nblocks + 1) << ns->lba_shift;
meta_len = (io.nblocks + 1) * ns->ms;
write = io.opcode & 1;
prp_len = nvme_setup_prps(dev, iod, length, GFP_KERNEL);
if (length != prp_len) {
status = -ENOMEM;
goto unmap;
}
if (meta_len) {
if (((io.metadata & 3) || !io.metadata) && !ns->ext)
return -EINVAL;
if (ns->ext) {
length += meta_len;
meta_len = 0;
}
meta = dma_alloc_coherent(dev->dev, meta_len,
&meta_dma, GFP_KERNEL);
if (!meta) {
@ -1786,13 +1781,11 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
c.rw.reftag = cpu_to_le32(io.reftag);
c.rw.apptag = cpu_to_le16(io.apptag);
c.rw.appmask = cpu_to_le16(io.appmask);
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_sync_cmd(ns->queue, &c);
status = __nvme_submit_sync_cmd(ns->queue, &c, NULL,
(void __user *)io.addr, length, NULL, 0);
unmap:
nvme_unmap_user_pages(dev, write, iod);
nvme_free_iod(dev, iod);
if (meta) {
if (status == NVME_SC_SUCCESS && !write) {
if (copy_to_user((void __user *)io.metadata, meta,
@ -1809,9 +1802,8 @@ static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns,
{
struct nvme_passthru_cmd cmd;
struct nvme_command c;
int status, length;
struct nvme_iod *uninitialized_var(iod);
unsigned timeout;
unsigned timeout = 0;
int status;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@ -1831,38 +1823,17 @@ static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns,
c.common.cdw10[4] = cpu_to_le32(cmd.cdw14);
c.common.cdw10[5] = cpu_to_le32(cmd.cdw15);
length = cmd.data_len;
if (cmd.data_len) {
iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr,
length);
if (IS_ERR(iod))
return PTR_ERR(iod);
length = nvme_setup_prps(dev, iod, length, GFP_KERNEL);
c.common.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
c.common.prp2 = cpu_to_le64(iod->first_dma);
}
timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) :
ADMIN_TIMEOUT;
if (length != cmd.data_len) {
status = -ENOMEM;
goto out;
}
if (cmd.timeout_ms)
timeout = msecs_to_jiffies(cmd.timeout_ms);
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);
NULL, (void __user *)cmd.addr, cmd.data_len,
&cmd.result, timeout);
if (status >= 0) {
if (put_user(cmd.result, &ucmd->result))
return -EFAULT;
}
if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result,
sizeof(cmd.result)))
status = -EFAULT;
return status;
}
@ -1954,22 +1925,14 @@ static int nvme_revalidate_disk(struct gendisk *disk)
struct nvme_ns *ns = disk->private_data;
struct nvme_dev *dev = ns->dev;
struct nvme_id_ns *id;
dma_addr_t dma_addr;
u8 lbaf, pi_type;
u16 old_ms;
unsigned short bs;
id = dma_alloc_coherent(dev->dev, 4096, &dma_addr, GFP_KERNEL);
if (!id) {
dev_warn(dev->dev, "%s: Memory alocation failure\n", __func__);
if (nvme_identify_ns(dev, ns->ns_id, &id)) {
dev_warn(dev->dev, "%s: Identify failure\n", __func__);
return 0;
}
if (nvme_identify(dev, ns->ns_id, 0, dma_addr)) {
dev_warn(dev->dev,
"identify failed ns:%d, setting capacity to 0\n",
ns->ns_id);
memset(id, 0, sizeof(*id));
}
old_ms = ns->ms;
lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
@ -2010,7 +1973,7 @@ static int nvme_revalidate_disk(struct gendisk *disk)
if (dev->oncs & NVME_CTRL_ONCS_DSM)
nvme_config_discard(ns);
dma_free_coherent(dev->dev, 4096, id, dma_addr);
kfree(id);
return 0;
}
@ -2250,22 +2213,14 @@ static int nvme_dev_add(struct nvme_dev *dev)
int res;
unsigned nn, i;
struct nvme_id_ctrl *ctrl;
void *mem;
dma_addr_t dma_addr;
int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12;
mem = dma_alloc_coherent(dev->dev, 4096, &dma_addr, GFP_KERNEL);
if (!mem)
return -ENOMEM;
res = nvme_identify(dev, 0, 1, dma_addr);
res = nvme_identify_ctrl(dev, &ctrl);
if (res) {
dev_err(dev->dev, "Identify Controller failed (%d)\n", res);
dma_free_coherent(dev->dev, 4096, mem, dma_addr);
return -EIO;
}
ctrl = mem;
nn = le32_to_cpup(&ctrl->nn);
dev->oncs = le16_to_cpup(&ctrl->oncs);
dev->abort_limit = ctrl->acl + 1;
@ -2287,7 +2242,7 @@ static int nvme_dev_add(struct nvme_dev *dev)
} else
dev->max_hw_sectors = max_hw_sectors;
}
dma_free_coherent(dev->dev, 4096, mem, dma_addr);
kfree(ctrl);
dev->tagset.ops = &nvme_mq_ops;
dev->tagset.nr_hw_queues = dev->online_queues - 1;

422
drivers/block/nvme-scsi.c
View File

@ -525,8 +525,6 @@ static int nvme_trans_standard_inquiry_page(struct nvme_ns *ns,
int alloc_len)
{
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
int res;
int nvme_sc;
@ -536,21 +534,17 @@ static int nvme_trans_standard_inquiry_page(struct nvme_ns *ns,
u8 cmdque = 0x01 << 1;
u8 fw_offset = sizeof(dev->firmware_rev);
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* nvme ns identify - use DPS value for PROTECT field */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free;
return res;
id_ns = mem;
(id_ns->dps) ? (protect = 0x01) : (protect = 0);
if (id_ns->dps)
protect = 0x01;
else
protect = 0;
kfree(id_ns);
memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
inq_response[2] = VERSION_SPC_4;
@ -567,12 +561,7 @@ static int nvme_trans_standard_inquiry_page(struct nvme_ns *ns,
strncpy(&inq_response[32], dev->firmware_rev + fw_offset, 4);
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
out_free:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ns), mem, dma_addr);
out_dma:
return res;
return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
}
static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
@ -615,40 +604,35 @@ static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *inq_response, int alloc_len)
{
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
int res;
int nvme_sc;
int xfer_len;
__be32 tmp_id = cpu_to_be32(ns->ns_id);
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
memset(inq_response, 0, alloc_len);
inq_response[1] = INQ_DEVICE_IDENTIFICATION_PAGE; /* Page Code */
if (readl(&dev->bar->vs) >= NVME_VS(1, 1)) {
struct nvme_id_ns *id_ns = mem;
void *eui = id_ns->eui64;
int len = sizeof(id_ns->eui64);
struct nvme_id_ns *id_ns;
void *eui;
int len;
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free;
return res;
eui = id_ns->eui64;
len = sizeof(id_ns->eui64);
if (readl(&dev->bar->vs) >= NVME_VS(1, 2)) {
if (bitmap_empty(eui, len * 8)) {
eui = id_ns->nguid;
len = sizeof(id_ns->nguid);
}
}
if (bitmap_empty(eui, len * 8))
if (bitmap_empty(eui, len * 8)) {
kfree(id_ns);
goto scsi_string;
}
inq_response[3] = 4 + len; /* Page Length */
/* Designation Descriptor start */
@ -657,14 +641,14 @@ static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
inq_response[6] = 0x00; /* Rsvd */
inq_response[7] = len; /* Designator Length */
memcpy(&inq_response[8], eui, len);
kfree(id_ns);
} else {
scsi_string:
if (alloc_len < 72) {
res = nvme_trans_completion(hdr,
return nvme_trans_completion(hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out_free;
}
inq_response[3] = 0x48; /* Page Length */
/* Designation Descriptor start */
@ -679,12 +663,7 @@ static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
memcpy(&inq_response[56], dev->serial, sizeof(dev->serial));
}
xfer_len = alloc_len;
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
out_free:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ns), mem, dma_addr);
out_dma:
return res;
return nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
}
static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
@ -694,8 +673,6 @@ static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ctrl *id_ctrl;
struct nvme_id_ns *id_ns;
int xfer_len;
@ -708,39 +685,32 @@ static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 luiclr = 0x01;
inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
if (inq_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
if (inq_response == NULL)
return -ENOMEM;
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
/* nvme ns identify */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free;
goto out_free_inq;
spt = spt_lut[id_ns->dpc & 0x07] << 3;
if (id_ns->dps)
protect = 0x01;
else
protect = 0;
kfree(id_ns);
id_ns = mem;
spt = spt_lut[(id_ns->dpc) & 0x07] << 3;
(id_ns->dps) ? (protect = 0x01) : (protect = 0);
grd_chk = protect << 2;
app_chk = protect << 1;
ref_chk = protect;
/* nvme controller identify */
nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
nvme_sc = nvme_identify_ctrl(dev, &id_ctrl);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_free;
goto out_free_inq;
id_ctrl = mem;
v_sup = id_ctrl->vwc;
kfree(id_ctrl);
memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
inq_response[1] = INQ_EXTENDED_INQUIRY_DATA_PAGE; /* Page Code */
@ -756,11 +726,8 @@ static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
xfer_len = min(alloc_len, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
out_free:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ns), mem, dma_addr);
out_dma:
out_free_inq:
kfree(inq_response);
out_mem:
return res;
}
@ -847,43 +814,27 @@ static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
int res;
int xfer_len;
u8 *log_response;
struct nvme_command c;
struct nvme_dev *dev = ns->dev;
struct nvme_smart_log *smart_log;
dma_addr_t dma_addr;
void *mem;
u8 temp_c;
u16 temp_k;
log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
if (log_response == NULL)
return -ENOMEM;
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_smart_log),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
res = nvme_get_log_page(dev, &smart_log);
if (res < 0)
goto out_free_response;
/* Get SMART Log Page */
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_get_log_page;
c.common.nsid = cpu_to_le32(0xFFFFFFFF);
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_sync_cmd(dev->admin_q, &c);
if (res != NVME_SC_SUCCESS) {
temp_c = LOG_TEMP_UNKNOWN;
} else {
smart_log = mem;
temp_k = (smart_log->temperature[1] << 8) +
(smart_log->temperature[0]);
temp_c = temp_k - KELVIN_TEMP_FACTOR;
}
kfree(smart_log);
log_response[0] = LOG_PAGE_INFORMATIONAL_EXCEPTIONS_PAGE;
/* Subpage=0x00, Page Length MSB=0 */
@ -899,11 +850,8 @@ static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
xfer_len = min(alloc_len, LOG_INFO_EXCP_PAGE_LENGTH);
res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
dma_free_coherent(dev->dev, sizeof(struct nvme_smart_log),
mem, dma_addr);
out_dma:
out_free_response:
kfree(log_response);
out_mem:
return res;
}
@ -913,44 +861,28 @@ static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int res;
int xfer_len;
u8 *log_response;
struct nvme_command c;
struct nvme_dev *dev = ns->dev;
struct nvme_smart_log *smart_log;
dma_addr_t dma_addr;
void *mem;
u32 feature_resp;
u8 temp_c_cur, temp_c_thresh;
u16 temp_k;
log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
if (log_response == NULL)
return -ENOMEM;
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_smart_log),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out_dma;
}
res = nvme_get_log_page(dev, &smart_log);
if (res < 0)
goto out_free_response;
/* Get SMART Log Page */
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_get_log_page;
c.common.nsid = cpu_to_le32(0xFFFFFFFF);
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_sync_cmd(dev->admin_q, &c);
if (res != NVME_SC_SUCCESS) {
temp_c_cur = LOG_TEMP_UNKNOWN;
} else {
smart_log = mem;
temp_k = (smart_log->temperature[1] << 8) +
(smart_log->temperature[0]);
temp_c_cur = temp_k - KELVIN_TEMP_FACTOR;
}
kfree(smart_log);
/* Get Features for Temp Threshold */
res = nvme_get_features(dev, NVME_FEAT_TEMP_THRESH, 0, 0,
@ -979,11 +911,8 @@ static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
xfer_len = min(alloc_len, LOG_TEMP_PAGE_LENGTH);
res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);
dma_free_coherent(dev->dev, sizeof(struct nvme_smart_log),
mem, dma_addr);
out_dma:
out_free_response:
kfree(log_response);
out_mem:
return res;
}
@ -1019,8 +948,6 @@ static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
u8 flbas;
u32 lba_length;
@ -1030,20 +957,11 @@ static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
else if (llbaa > 0 && len < MODE_PAGE_LLBAA_BLK_DES_LEN)
return -EINVAL;
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* nvme ns identify */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
return res;
id_ns = mem;
flbas = (id_ns->flbas) & 0x0F;
lba_length = (1 << (id_ns->lbaf[flbas].ds));
@ -1063,9 +981,7 @@ static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,
memcpy(&resp[12], &tmp_len, sizeof(u32));
}
out_dma:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ns), mem, dma_addr);
out:
kfree(id_ns);
return res;
}
@ -1291,26 +1207,17 @@ static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ctrl *id_ctrl;
int lowest_pow_st; /* max npss = lowest power consumption */
unsigned ps_desired = 0;
/* NVMe Controller Identify */
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ctrl),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
nvme_sc = nvme_identify_ctrl(dev, &id_ctrl);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
return res;
id_ctrl = mem;
lowest_pow_st = max(POWER_STATE_0, (int)(id_ctrl->npss - 1));
kfree(id_ctrl);
switch (pc) {
case NVME_POWER_STATE_START_VALID:
@ -1350,12 +1257,7 @@ static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
}
nvme_sc = nvme_set_features(dev, NVME_FEAT_POWER_MGMT, ps_desired, 0,
NULL);
res = nvme_trans_status_code(hdr, nvme_sc);
out_dma:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ctrl), mem, dma_addr);
out:
return res;
return nvme_trans_status_code(hdr, nvme_sc);
}
static int nvme_trans_send_activate_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
@ -1368,7 +1270,7 @@ static int nvme_trans_send_activate_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr
c.common.opcode = nvme_admin_activate_fw;
c.common.cdw10[0] = cpu_to_le32(buffer_id | NVME_FWACT_REPL_ACTV);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
return nvme_trans_status_code(hdr, nvme_sc);
}
@ -1376,15 +1278,9 @@ static int nvme_trans_send_download_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr
u8 opcode, u32 tot_len, u32 offset,
u8 buffer_id)
{
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
struct nvme_command c;
struct nvme_iod *iod = NULL;
unsigned length;
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_download_fw;
if (hdr->iovec_count > 0) {
/* Assuming SGL is not allowed for this command */
@ -1394,28 +1290,15 @@ static int nvme_trans_send_download_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr
SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
iod = nvme_map_user_pages(dev, DMA_TO_DEVICE,
(unsigned long)hdr->dxferp, tot_len);
if (IS_ERR(iod))
return PTR_ERR(iod);
length = nvme_setup_prps(dev, iod, tot_len, GFP_KERNEL);
if (length != tot_len) {
res = -ENOMEM;
goto out_unmap;
}
c.dlfw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
c.dlfw.prp2 = cpu_to_le64(iod->first_dma);
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_download_fw;
c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);
c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);
nvme_sc = nvme_submit_sync_cmd(dev->admin_q, &c);
res = nvme_trans_status_code(hdr, nvme_sc);
out_unmap:
nvme_unmap_user_pages(dev, DMA_TO_DEVICE, iod);
nvme_free_iod(dev, iod);
return res;
nvme_sc = __nvme_submit_sync_cmd(dev->admin_q, &c, NULL,
hdr->dxferp, tot_len, NULL, 0);
return nvme_trans_status_code(hdr, nvme_sc);
}
/* Mode Select Helper Functions */
@ -1590,9 +1473,6 @@ static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
int res = 0;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
u8 flbas;
/*
@ -1603,19 +1483,12 @@ static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
*/
if (ns->mode_select_num_blocks == 0 || ns->mode_select_block_len == 0) {
mem = dma_alloc_coherent(dev->dev,
sizeof(struct nvme_id_ns), &dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* nvme ns identify */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
struct nvme_id_ns *id_ns;
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
id_ns = mem;
return res;
if (ns->mode_select_num_blocks == 0)
ns->mode_select_num_blocks = le64_to_cpu(id_ns->ncap);
@ -1624,12 +1497,11 @@ static int nvme_trans_fmt_set_blk_size_count(struct nvme_ns *ns,
ns->mode_select_block_len =
(1 << (id_ns->lbaf[flbas].ds));
}
out_dma:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ns),
mem, dma_addr);
kfree(id_ns);
}
out:
return res;
return 0;
}
static int nvme_trans_fmt_get_parm_header(struct sg_io_hdr *hdr, u8 len,
@ -1698,8 +1570,6 @@ static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int res;
int nvme_sc;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
u8 i;
u8 flbas, nlbaf;
@ -1708,19 +1578,11 @@ static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,
struct nvme_command c;
/* Loop thru LBAF's in id_ns to match reqd lbaf, put in cdw10 */
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* nvme ns identify */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
return res;
id_ns = mem;
flbas = (id_ns->flbas) & 0x0F;
nlbaf = id_ns->nlbaf;
@ -1748,12 +1610,10 @@ 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_sync_cmd(dev->admin_q, &c);
nvme_sc = nvme_submit_sync_cmd(dev->admin_q, &c, NULL, 0);
res = nvme_trans_status_code(hdr, nvme_sc);
out_dma:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ns), mem, dma_addr);
out:
kfree(id_ns);
return res;
}
@ -1787,9 +1647,7 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
struct nvme_trans_io_cdb *cdb_info, u8 is_write)
{
int nvme_sc = NVME_SC_SUCCESS;
struct nvme_dev *dev = ns->dev;
u32 num_cmds;
struct nvme_iod *iod;
u64 unit_len;
u64 unit_num_blocks; /* Number of blocks to xfer in each nvme cmd */
u32 retcode;
@ -1840,35 +1698,17 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,
control = nvme_trans_io_get_control(ns, cdb_info);
c.rw.control = cpu_to_le16(control);
iod = nvme_map_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
(unsigned long)next_mapping_addr, unit_len);
if (IS_ERR(iod))
return PTR_ERR(iod);
retcode = nvme_setup_prps(dev, iod, unit_len, GFP_KERNEL);
if (retcode != unit_len) {
nvme_unmap_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
iod);
nvme_free_iod(dev, iod);
return -ENOMEM;
if (get_capacity(ns->disk) - unit_num_blocks <
cdb_info->lba + nvme_offset) {
nvme_sc = NVME_SC_LBA_RANGE;
break;
}
c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
c.rw.prp2 = cpu_to_le64(iod->first_dma);
nvme_sc = __nvme_submit_sync_cmd(ns->queue, &c, NULL,
next_mapping_addr, unit_len, NULL, 0);
if (nvme_sc)
break;
nvme_offset += unit_num_blocks;
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
nvme_unmap_user_pages(dev,
(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
iod);
nvme_free_iod(dev, iod);
if (nvme_sc != NVME_SC_SUCCESS)
break;
}
return nvme_trans_status_code(hdr, nvme_sc);
@ -2199,8 +2039,6 @@ static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u32 resp_size;
u32 xfer_len;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ns *id_ns;
u8 *response;
@ -2212,24 +2050,15 @@ static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
resp_size = READ_CAP_10_RESP_SIZE;
}
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ns),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
/* nvme ns identify */
nvme_sc = nvme_identify(dev, ns->ns_id, 0, dma_addr);
nvme_sc = nvme_identify_ns(dev, ns->ns_id, &id_ns);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
id_ns = mem;
return res;
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_dma;
goto out_free_id;
}
nvme_trans_fill_read_cap(response, id_ns, cdb16);
@ -2237,9 +2066,8 @@ static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
res = nvme_trans_copy_to_user(hdr, response, xfer_len);
kfree(response);
out_dma:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ns), mem, dma_addr);
out:
out_free_id:
kfree(id_ns);
return res;
}
@ -2251,8 +2079,6 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u32 alloc_len, xfer_len, resp_size;
u8 *response;
struct nvme_dev *dev = ns->dev;
dma_addr_t dma_addr;
void *mem;
struct nvme_id_ctrl *id_ctrl;
u32 ll_length, lun_id;
u8 lun_id_offset = REPORT_LUNS_FIRST_LUN_OFFSET;
@ -2266,19 +2092,11 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
case ALL_LUNS_RETURNED:
case ALL_WELL_KNOWN_LUNS_RETURNED:
case RESTRICTED_LUNS_RETURNED:
/* NVMe Controller Identify */
mem = dma_alloc_coherent(dev->dev, sizeof(struct nvme_id_ctrl),
&dma_addr, GFP_KERNEL);
if (mem == NULL) {
res = -ENOMEM;
goto out;
}
nvme_sc = nvme_identify(dev, 0, 1, dma_addr);
nvme_sc = nvme_identify_ctrl(dev, &id_ctrl);
res = nvme_trans_status_code(hdr, nvme_sc);
if (res)
goto out_dma;
return res;
id_ctrl = mem;
ll_length = le32_to_cpu(id_ctrl->nn) * LUN_ENTRY_SIZE;
resp_size = ll_length + LUN_DATA_HEADER_SIZE;
@ -2288,13 +2106,13 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
SAM_STAT_CHECK_CONDITION,
ILLEGAL_REQUEST, SCSI_ASC_INVALID_CDB,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
goto out_dma;
goto out_free_id;
}
response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_dma;
goto out_free_id;
}
/* The first LUN ID will always be 0 per the SAM spec */
@ -2315,9 +2133,8 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
res = nvme_trans_copy_to_user(hdr, response, xfer_len);
kfree(response);
out_dma:
dma_free_coherent(dev->dev, sizeof(struct nvme_id_ctrl), mem, dma_addr);
out:
out_free_id:
kfree(id_ctrl);
return res;
}
@ -2379,12 +2196,23 @@ static int nvme_trans_security_protocol(struct nvme_ns *ns,
SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
}
static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
struct sg_io_hdr *hdr)
{
int nvme_sc;
struct nvme_command c;
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_cmd_flush;
c.common.nsid = cpu_to_le32(ns->ns_id);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, NULL, 0);
return nvme_trans_status_code(hdr, nvme_sc);
}
static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
int res;
int nvme_sc;
struct nvme_command c;
u8 immed, pcmod, pc, no_flush, start;
immed = cmd[1] & 0x01;
@ -2400,12 +2228,7 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
} else {
if (no_flush == 0) {
/* Issue NVME FLUSH command prior to START STOP UNIT */
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_cmd_flush;
c.common.nsid = cpu_to_le32(ns->ns_id);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
res = nvme_trans_status_code(hdr, nvme_sc);
int res = nvme_trans_synchronize_cache(ns, hdr);
if (res)
return res;
}
@ -2414,20 +2237,6 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,
}
}
static int nvme_trans_synchronize_cache(struct nvme_ns *ns,
struct sg_io_hdr *hdr, u8 *cmd)
{
int nvme_sc;
struct nvme_command c;
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_cmd_flush;
c.common.nsid = cpu_to_le32(ns->ns_id);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
return nvme_trans_status_code(hdr, nvme_sc);
}
static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
@ -2563,13 +2372,11 @@ struct scsi_unmap_parm_list {
static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 *cmd)
{
struct nvme_dev *dev = ns->dev;
struct scsi_unmap_parm_list *plist;
struct nvme_dsm_range *range;
struct nvme_command c;
int i, nvme_sc, res = -ENOMEM;
u16 ndesc, list_len;
dma_addr_t dma_addr;
list_len = get_unaligned_be16(&cmd[7]);
if (!list_len)
@ -2589,8 +2396,7 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
goto out;
}
range = dma_alloc_coherent(dev->dev, ndesc * sizeof(*range),
&dma_addr, GFP_KERNEL);
range = kcalloc(ndesc, sizeof(*range), GFP_KERNEL);
if (!range)
goto out;
@ -2603,14 +2409,14 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,
memset(&c, 0, sizeof(c));
c.dsm.opcode = nvme_cmd_dsm;
c.dsm.nsid = cpu_to_le32(ns->ns_id);
c.dsm.prp1 = cpu_to_le64(dma_addr);
c.dsm.nr = cpu_to_le32(ndesc - 1);
c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c);
nvme_sc = nvme_submit_sync_cmd(ns->queue, &c, range,
ndesc * sizeof(*range));
res = nvme_trans_status_code(hdr, nvme_sc);
dma_free_coherent(dev->dev, ndesc * sizeof(*range), range, dma_addr);
kfree(range);
out:
kfree(plist);
return res;
@ -2690,7 +2496,7 @@ static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr)
retcode = nvme_trans_start_stop(ns, hdr, cmd);
break;
case SYNCHRONIZE_CACHE:
retcode = nvme_trans_synchronize_cache(ns, hdr, cmd);
retcode = nvme_trans_synchronize_cache(ns, hdr);
break;
case FORMAT_UNIT:
retcode = nvme_trans_format_unit(ns, hdr, cmd);

24
include/linux/nvme.h
View File

@ -146,21 +146,15 @@ static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
return (sector >> (ns->lba_shift - 9));
}
/**
* nvme_free_iod - frees an nvme_iod
* @dev: The device that the I/O was submitted to
* @iod: The memory to free
*/
void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod);
int nvme_setup_prps(struct nvme_dev *, struct nvme_iod *, int, gfp_t);
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_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_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);
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);
int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log);
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
dma_addr_t dma_addr, u32 *result);
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,