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-rw-r--r--drivers/block/nvme-core.c585
-rw-r--r--drivers/block/nvme-scsi.c24
-rw-r--r--include/linux/nvme.h466
-rw-r--r--include/uapi/linux/Kbuild1
-rw-r--r--include/uapi/linux/nvme.h477
5 files changed, 895 insertions, 658 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index ce79a59..da52092 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -36,6 +36,7 @@
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/poison.h>
+#include <linux/ptrace.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>
@@ -79,7 +80,9 @@ struct nvme_queue {
u16 sq_head;
u16 sq_tail;
u16 cq_head;
- u16 cq_phase;
+ u8 cq_phase;
+ u8 cqe_seen;
+ u8 q_suspended;
unsigned long cmdid_data[];
};
@@ -115,6 +118,11 @@ static struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq)
return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)];
}
+static unsigned nvme_queue_extra(int depth)
+{
+ return DIV_ROUND_UP(depth, 8) + (depth * sizeof(struct nvme_cmd_info));
+}
+
/**
* alloc_cmdid() - Allocate a Command ID
* @nvmeq: The queue that will be used for this command
@@ -285,6 +293,7 @@ nvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp)
iod->npages = -1;
iod->length = nbytes;
iod->nents = 0;
+ iod->start_time = jiffies;
}
return iod;
@@ -308,6 +317,30 @@ void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
kfree(iod);
}
+static void nvme_start_io_acct(struct bio *bio)
+{
+ struct gendisk *disk = bio->bi_bdev->bd_disk;
+ const int rw = bio_data_dir(bio);
+ int cpu = part_stat_lock();
+ part_round_stats(cpu, &disk->part0);
+ part_stat_inc(cpu, &disk->part0, ios[rw]);
+ part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio));
+ part_inc_in_flight(&disk->part0, rw);
+ part_stat_unlock();
+}
+
+static void nvme_end_io_acct(struct bio *bio, unsigned long start_time)
+{
+ struct gendisk *disk = bio->bi_bdev->bd_disk;
+ const int rw = bio_data_dir(bio);
+ unsigned long duration = jiffies - start_time;
+ int cpu = part_stat_lock();
+ part_stat_add(cpu, &disk->part0, ticks[rw], duration);
+ part_round_stats(cpu, &disk->part0);
+ part_dec_in_flight(&disk->part0, rw);
+ part_stat_unlock();
+}
+
static void bio_completion(struct nvme_dev *dev, void *ctx,
struct nvme_completion *cqe)
{
@@ -315,9 +348,11 @@ static void bio_completion(struct nvme_dev *dev, void *ctx,
struct bio *bio = iod->private;
u16 status = le16_to_cpup(&cqe->status) >> 1;
- if (iod->nents)
+ if (iod->nents) {
dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents,
bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ nvme_end_io_acct(bio, iod->start_time);
+ }
nvme_free_iod(dev, iod);
if (status)
bio_endio(bio, -EIO);
@@ -422,10 +457,8 @@ static void nvme_bio_pair_endio(struct bio *bio, int err)
if (atomic_dec_and_test(&bp->cnt)) {
bio_endio(bp->parent, bp->err);
- if (bp->bv1)
- kfree(bp->bv1);
- if (bp->bv2)
- kfree(bp->bv2);
+ kfree(bp->bv1);
+ kfree(bp->bv2);
kfree(bp);
}
}
@@ -695,6 +728,7 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
cmnd->rw.control = cpu_to_le16(control);
cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt);
+ nvme_start_io_acct(bio);
if (++nvmeq->sq_tail == nvmeq->q_depth)
nvmeq->sq_tail = 0;
writel(nvmeq->sq_tail, nvmeq->q_db);
@@ -709,26 +743,7 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
return result;
}
-static void nvme_make_request(struct request_queue *q, struct bio *bio)
-{
- struct nvme_ns *ns = q->queuedata;
- struct nvme_queue *nvmeq = get_nvmeq(ns->dev);
- int result = -EBUSY;
-
- spin_lock_irq(&nvmeq->q_lock);
- if (bio_list_empty(&nvmeq->sq_cong))
- result = nvme_submit_bio_queue(nvmeq, ns, bio);
- if (unlikely(result)) {
- if (bio_list_empty(&nvmeq->sq_cong))
- add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait);
- bio_list_add(&nvmeq->sq_cong, bio);
- }
-
- spin_unlock_irq(&nvmeq->q_lock);
- put_nvmeq(nvmeq);
-}
-
-static irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq)
+static int nvme_process_cq(struct nvme_queue *nvmeq)
{
u16 head, phase;
@@ -758,13 +773,40 @@ static irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq)
* a big problem.
*/
if (head == nvmeq->cq_head && phase == nvmeq->cq_phase)
- return IRQ_NONE;
+ return 0;
writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride));
nvmeq->cq_head = head;
nvmeq->cq_phase = phase;
- return IRQ_HANDLED;
+ nvmeq->cqe_seen = 1;
+ return 1;
+}
+
+static void nvme_make_request(struct request_queue *q, struct bio *bio)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_queue *nvmeq = get_nvmeq(ns->dev);
+ int result = -EBUSY;
+
+ if (!nvmeq) {
+ put_nvmeq(NULL);
+ bio_endio(bio, -EIO);
+ return;
+ }
+
+ spin_lock_irq(&nvmeq->q_lock);
+ if (!nvmeq->q_suspended && bio_list_empty(&nvmeq->sq_cong))
+ result = nvme_submit_bio_queue(nvmeq, ns, bio);
+ if (unlikely(result)) {
+ if (bio_list_empty(&nvmeq->sq_cong))
+ add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait);
+ bio_list_add(&nvmeq->sq_cong, bio);
+ }
+
+ nvme_process_cq(nvmeq);
+ spin_unlock_irq(&nvmeq->q_lock);
+ put_nvmeq(nvmeq);
}
static irqreturn_t nvme_irq(int irq, void *data)
@@ -772,7 +814,9 @@ static irqreturn_t nvme_irq(int irq, void *data)
irqreturn_t result;
struct nvme_queue *nvmeq = data;
spin_lock(&nvmeq->q_lock);
- result = nvme_process_cq(nvmeq);
+ nvme_process_cq(nvmeq);
+ result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE;
+ nvmeq->cqe_seen = 0;
spin_unlock(&nvmeq->q_lock);
return result;
}
@@ -986,8 +1030,15 @@ static void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout)
}
}
-static void nvme_free_queue_mem(struct nvme_queue *nvmeq)
+static void nvme_free_queue(struct nvme_queue *nvmeq)
{
+ spin_lock_irq(&nvmeq->q_lock);
+ while (bio_list_peek(&nvmeq->sq_cong)) {
+ struct bio *bio = bio_list_pop(&nvmeq->sq_cong);
+ bio_endio(bio, -EIO);
+ }
+ spin_unlock_irq(&nvmeq->q_lock);
+
dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth),
(void *)nvmeq->cqes, nvmeq->cq_dma_addr);
dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth),
@@ -995,17 +1046,28 @@ static void nvme_free_queue_mem(struct nvme_queue *nvmeq)
kfree(nvmeq);
}
-static void nvme_free_queue(struct nvme_dev *dev, int qid)
+static void nvme_free_queues(struct nvme_dev *dev)
+{
+ int i;
+
+ for (i = dev->queue_count - 1; i >= 0; i--) {
+ nvme_free_queue(dev->queues[i]);
+ dev->queue_count--;
+ dev->queues[i] = NULL;
+ }
+}
+
+static void nvme_disable_queue(struct nvme_dev *dev, int qid)
{
struct nvme_queue *nvmeq = dev->queues[qid];
int vector = dev->entry[nvmeq->cq_vector].vector;
spin_lock_irq(&nvmeq->q_lock);
- nvme_cancel_ios(nvmeq, false);
- while (bio_list_peek(&nvmeq->sq_cong)) {
- struct bio *bio = bio_list_pop(&nvmeq->sq_cong);
- bio_endio(bio, -EIO);
+ if (nvmeq->q_suspended) {
+ spin_unlock_irq(&nvmeq->q_lock);
+ return;
}
+ nvmeq->q_suspended = 1;
spin_unlock_irq(&nvmeq->q_lock);
irq_set_affinity_hint(vector, NULL);
@@ -1017,15 +1079,17 @@ static void nvme_free_queue(struct nvme_dev *dev, int qid)
adapter_delete_cq(dev, qid);
}
- nvme_free_queue_mem(nvmeq);
+ spin_lock_irq(&nvmeq->q_lock);
+ nvme_process_cq(nvmeq);
+ nvme_cancel_ios(nvmeq, false);
+ spin_unlock_irq(&nvmeq->q_lock);
}
static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid,
int depth, int vector)
{
struct device *dmadev = &dev->pci_dev->dev;
- unsigned extra = DIV_ROUND_UP(depth, 8) + (depth *
- sizeof(struct nvme_cmd_info));
+ unsigned extra = nvme_queue_extra(depth);
struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL);
if (!nvmeq)
return NULL;
@@ -1052,6 +1116,8 @@ static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid,
nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)];
nvmeq->q_depth = depth;
nvmeq->cq_vector = vector;
+ nvmeq->q_suspended = 1;
+ dev->queue_count++;
return nvmeq;
@@ -1075,18 +1141,29 @@ static int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq,
IRQF_DISABLED | IRQF_SHARED, name, nvmeq);
}
-static struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid,
- int cq_size, int vector)
+static void nvme_init_queue(struct nvme_queue *nvmeq, u16 qid)
{
- int result;
- struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector);
+ struct nvme_dev *dev = nvmeq->dev;
+ unsigned extra = nvme_queue_extra(nvmeq->q_depth);
- if (!nvmeq)
- return ERR_PTR(-ENOMEM);
+ nvmeq->sq_tail = 0;
+ nvmeq->cq_head = 0;
+ nvmeq->cq_phase = 1;
+ nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)];
+ memset(nvmeq->cmdid_data, 0, extra);
+ memset((void *)nvmeq->cqes, 0, CQ_SIZE(nvmeq->q_depth));
+ nvme_cancel_ios(nvmeq, false);
+ nvmeq->q_suspended = 0;
+}
+
+static int nvme_create_queue(struct nvme_queue *nvmeq, int qid)
+{
+ struct nvme_dev *dev = nvmeq->dev;
+ int result;
result = adapter_alloc_cq(dev, qid, nvmeq);
if (result < 0)
- goto free_nvmeq;
+ return result;
result = adapter_alloc_sq(dev, qid, nvmeq);
if (result < 0)
@@ -1096,19 +1173,17 @@ static struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid,
if (result < 0)
goto release_sq;
- return nvmeq;
+ spin_lock(&nvmeq->q_lock);
+ nvme_init_queue(nvmeq, qid);
+ spin_unlock(&nvmeq->q_lock);
+
+ return result;
release_sq:
adapter_delete_sq(dev, qid);
release_cq:
adapter_delete_cq(dev, qid);
- free_nvmeq:
- dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth),
- (void *)nvmeq->cqes, nvmeq->cq_dma_addr);
- dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth),
- nvmeq->sq_cmds, nvmeq->sq_dma_addr);
- kfree(nvmeq);
- return ERR_PTR(result);
+ return result;
}
static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled)
@@ -1152,6 +1227,30 @@ static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap)
return nvme_wait_ready(dev, cap, true);
}
+static int nvme_shutdown_ctrl(struct nvme_dev *dev)
+{
+ unsigned long timeout;
+ u32 cc;
+
+ cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL;
+ writel(cc, &dev->bar->cc);
+
+ timeout = 2 * HZ + jiffies;
+ while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) !=
+ NVME_CSTS_SHST_CMPLT) {
+ msleep(100);
+ if (fatal_signal_pending(current))
+ return -EINTR;
+ if (time_after(jiffies, timeout)) {
+ dev_err(&dev->pci_dev->dev,
+ "Device shutdown incomplete; abort shutdown\n");
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
static int nvme_configure_admin_queue(struct nvme_dev *dev)
{
int result;
@@ -1159,16 +1258,17 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
u64 cap = readq(&dev->bar->cap);
struct nvme_queue *nvmeq;
- dev->dbs = ((void __iomem *)dev->bar) + 4096;
- dev->db_stride = NVME_CAP_STRIDE(cap);
-
result = nvme_disable_ctrl(dev, cap);
if (result < 0)
return result;
- nvmeq = nvme_alloc_queue(dev, 0, 64, 0);
- if (!nvmeq)
- return -ENOMEM;
+ nvmeq = dev->queues[0];
+ if (!nvmeq) {
+ nvmeq = nvme_alloc_queue(dev, 0, 64, 0);
+ if (!nvmeq)
+ return -ENOMEM;
+ dev->queues[0] = nvmeq;
+ }
aqa = nvmeq->q_depth - 1;
aqa |= aqa << 16;
@@ -1185,17 +1285,15 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
result = nvme_enable_ctrl(dev, cap);
if (result)
- goto free_q;
+ return result;
result = queue_request_irq(dev, nvmeq, "nvme admin");
if (result)
- goto free_q;
-
- dev->queues[0] = nvmeq;
- return result;
+ return result;
- free_q:
- nvme_free_queue_mem(nvmeq);
+ spin_lock(&nvmeq->q_lock);
+ nvme_init_queue(nvmeq, 0);
+ spin_unlock(&nvmeq->q_lock);
return result;
}
@@ -1314,7 +1412,8 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
c.rw.appmask = cpu_to_le16(io.appmask);
if (meta_len) {
- meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, meta_len);
+ meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata,
+ meta_len);
if (IS_ERR(meta_iod)) {
status = PTR_ERR(meta_iod);
meta_iod = NULL;
@@ -1356,6 +1455,8 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
put_nvmeq(nvmeq);
if (length != (io.nblocks + 1) << ns->lba_shift)
status = -ENOMEM;
+ else if (!nvmeq || nvmeq->q_suspended)
+ status = -EBUSY;
else
status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT);
@@ -1453,6 +1554,7 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
switch (cmd) {
case NVME_IOCTL_ID:
+ force_successful_syscall_return();
return ns->ns_id;
case NVME_IOCTL_ADMIN_CMD:
return nvme_user_admin_cmd(ns->dev, (void __user *)arg);
@@ -1506,10 +1608,12 @@ static int nvme_kthread(void *data)
if (!nvmeq)
continue;
spin_lock_irq(&nvmeq->q_lock);
- if (nvme_process_cq(nvmeq))
- printk("process_cq did something\n");
+ if (nvmeq->q_suspended)
+ goto unlock;
+ nvme_process_cq(nvmeq);
nvme_cancel_ios(nvmeq, true);
nvme_resubmit_bios(nvmeq);
+ unlock:
spin_unlock_irq(&nvmeq->q_lock);
}
}
@@ -1556,7 +1660,7 @@ static void nvme_config_discard(struct nvme_ns *ns)
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
}
-static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid,
+static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid,
struct nvme_id_ns *id, struct nvme_lba_range_type *rt)
{
struct nvme_ns *ns;
@@ -1631,14 +1735,19 @@ static int set_queue_count(struct nvme_dev *dev, int count)
status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0,
&result);
if (status)
- return -EIO;
+ return status < 0 ? -EIO : -EBUSY;
return min(result & 0xffff, result >> 16) + 1;
}
+static size_t db_bar_size(struct nvme_dev *dev, unsigned nr_io_queues)
+{
+ return 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3));
+}
+
static int nvme_setup_io_queues(struct nvme_dev *dev)
{
struct pci_dev *pdev = dev->pci_dev;
- int result, cpu, i, nr_io_queues, db_bar_size, q_depth, q_count;
+ int result, cpu, i, vecs, nr_io_queues, size, q_depth;
nr_io_queues = num_online_cpus();
result = set_queue_count(dev, nr_io_queues);
@@ -1647,53 +1756,80 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
if (result < nr_io_queues)
nr_io_queues = result;
- q_count = nr_io_queues;
- /* Deregister the admin queue's interrupt */
- free_irq(dev->entry[0].vector, dev->queues[0]);
-
- db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3));
- if (db_bar_size > 8192) {
+ size = db_bar_size(dev, nr_io_queues);
+ if (size > 8192) {
iounmap(dev->bar);
- dev->bar = ioremap(pci_resource_start(pdev, 0), db_bar_size);
+ do {
+ dev->bar = ioremap(pci_resource_start(pdev, 0), size);
+ if (dev->bar)
+ break;
+ if (!--nr_io_queues)
+ return -ENOMEM;
+ size = db_bar_size(dev, nr_io_queues);
+ } while (1);
dev->dbs = ((void __iomem *)dev->bar) + 4096;
dev->queues[0]->q_db = dev->dbs;
}
- for (i = 0; i < nr_io_queues; i++)
+ /* Deregister the admin queue's interrupt */
+ free_irq(dev->entry[0].vector, dev->queues[0]);
+
+ vecs = nr_io_queues;
+ for (i = 0; i < vecs; i++)
dev->entry[i].entry = i;
for (;;) {
- result = pci_enable_msix(pdev, dev->entry, nr_io_queues);
- if (result == 0) {
- break;
- } else if (result > 0) {
- nr_io_queues = result;
- continue;
- } else {
- nr_io_queues = 0;
+ result = pci_enable_msix(pdev, dev->entry, vecs);
+ if (result <= 0)
break;
- }
+ vecs = result;
}
- if (nr_io_queues == 0) {
- nr_io_queues = q_count;
+ if (result < 0) {
+ vecs = nr_io_queues;
+ if (vecs > 32)
+ vecs = 32;
for (;;) {
- result = pci_enable_msi_block(pdev, nr_io_queues);
+ result = pci_enable_msi_block(pdev, vecs);
if (result == 0) {
- for (i = 0; i < nr_io_queues; i++)
+ for (i = 0; i < vecs; i++)
dev->entry[i].vector = i + pdev->irq;
break;
- } else if (result > 0) {
- nr_io_queues = result;
- continue;
- } else {
- nr_io_queues = 1;
+ } else if (result < 0) {
+ vecs = 1;
break;
}
+ vecs = result;
}
}
+ /*
+ * Should investigate if there's a performance win from allocating
+ * more queues than interrupt vectors; it might allow the submission
+ * path to scale better, even if the receive path is limited by the
+ * number of interrupts.
+ */
+ nr_io_queues = vecs;
+
result = queue_request_irq(dev, dev->queues[0], "nvme admin");
- /* XXX: handle failure here */
+ if (result) {
+ dev->queues[0]->q_suspended = 1;
+ goto free_queues;
+ }
+
+ /* Free previously allocated queues that are no longer usable */
+ spin_lock(&dev_list_lock);
+ for (i = dev->queue_count - 1; i > nr_io_queues; i--) {
+ struct nvme_queue *nvmeq = dev->queues[i];
+
+ spin_lock(&nvmeq->q_lock);
+ nvme_cancel_ios(nvmeq, false);
+ spin_unlock(&nvmeq->q_lock);
+
+ nvme_free_queue(nvmeq);
+ dev->queue_count--;
+ dev->queues[i] = NULL;
+ }
+ spin_unlock(&dev_list_lock);
cpu = cpumask_first(cpu_online_mask);
for (i = 0; i < nr_io_queues; i++) {
@@ -1703,11 +1839,12 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1,
NVME_Q_DEPTH);
- for (i = 0; i < nr_io_queues; i++) {
- dev->queues[i + 1] = nvme_create_queue(dev, i + 1, q_depth, i);
- if (IS_ERR(dev->queues[i + 1]))
- return PTR_ERR(dev->queues[i + 1]);
- dev->queue_count++;
+ for (i = dev->queue_count - 1; i < nr_io_queues; i++) {
+ dev->queues[i + 1] = nvme_alloc_queue(dev, i + 1, q_depth, i);
+ if (!dev->queues[i + 1]) {
+ result = -ENOMEM;
+ goto free_queues;
+ }
}
for (; i < num_possible_cpus(); i++) {
@@ -1715,15 +1852,20 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
dev->queues[i + 1] = dev->queues[target + 1];
}
- return 0;
-}
+ for (i = 1; i < dev->queue_count; i++) {
+ result = nvme_create_queue(dev->queues[i], i);
+ if (result) {
+ for (--i; i > 0; i--)
+ nvme_disable_queue(dev, i);
+ goto free_queues;
+ }
+ }
-static void nvme_free_queues(struct nvme_dev *dev)
-{
- int i;
+ return 0;
- for (i = dev->queue_count - 1; i >= 0; i--)
- nvme_free_queue(dev, i);
+ free_queues:
+ nvme_free_queues(dev);
+ return result;
}
/*
@@ -1734,7 +1876,8 @@ static void nvme_free_queues(struct nvme_dev *dev)
*/
static int nvme_dev_add(struct nvme_dev *dev)
{
- int res, nn, i;
+ int res;
+ unsigned nn, i;
struct nvme_ns *ns;
struct nvme_id_ctrl *ctrl;
struct nvme_id_ns *id_ns;
@@ -1742,10 +1885,6 @@ static int nvme_dev_add(struct nvme_dev *dev)
dma_addr_t dma_addr;
int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12;
- res = nvme_setup_io_queues(dev);
- if (res)
- return res;
-
mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr,
GFP_KERNEL);
if (!mem)
@@ -1796,23 +1935,86 @@ static int nvme_dev_add(struct nvme_dev *dev)
return res;
}
-static int nvme_dev_remove(struct nvme_dev *dev)
+static int nvme_dev_map(struct nvme_dev *dev)
{
- struct nvme_ns *ns, *next;
+ int bars, result = -ENOMEM;
+ struct pci_dev *pdev = dev->pci_dev;
+
+ if (pci_enable_device_mem(pdev))
+ return result;
+
+ dev->entry[0].vector = pdev->irq;
+ pci_set_master(pdev);
+ bars = pci_select_bars(pdev, IORESOURCE_MEM);
+ if (pci_request_selected_regions(pdev, bars, "nvme"))
+ goto disable_pci;
+
+ if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
+ dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
+ else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)))
+ dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ else
+ goto disable_pci;
+
+ pci_set_drvdata(pdev, dev);
+ dev->bar = ioremap(pci_resource_start(pdev, 0), 8192);
+ if (!dev->bar)
+ goto disable;
+
+ dev->db_stride = NVME_CAP_STRIDE(readq(&dev->bar->cap));
+ dev->dbs = ((void __iomem *)dev->bar) + 4096;
+
+ return 0;
+
+ disable:
+ pci_release_regions(pdev);
+ disable_pci:
+ pci_disable_device(pdev);
+ return result;
+}
+
+static void nvme_dev_unmap(struct nvme_dev *dev)
+{
+ if (dev->pci_dev->msi_enabled)
+ pci_disable_msi(dev->pci_dev);
+ else if (dev->pci_dev->msix_enabled)
+ pci_disable_msix(dev->pci_dev);
+
+ if (dev->bar) {
+ iounmap(dev->bar);
+ dev->bar = NULL;
+ }
+
+ pci_release_regions(dev->pci_dev);
+ if (pci_is_enabled(dev->pci_dev))
+ pci_disable_device(dev->pci_dev);
+}
+
+static void nvme_dev_shutdown(struct nvme_dev *dev)
+{
+ int i;
+
+ for (i = dev->queue_count - 1; i >= 0; i--)
+ nvme_disable_queue(dev, i);
spin_lock(&dev_list_lock);
- list_del(&dev->node);
+ list_del_init(&dev->node);
spin_unlock(&dev_list_lock);
+ if (dev->bar)
+ nvme_shutdown_ctrl(dev);
+ nvme_dev_unmap(dev);
+}
+
+static void nvme_dev_remove(struct nvme_dev *dev)
+{
+ struct nvme_ns *ns, *next;
+
list_for_each_entry_safe(ns, next, &dev->namespaces, list) {
list_del(&ns->list);
del_gendisk(ns->disk);
nvme_ns_free(ns);
}
-
- nvme_free_queues(dev);
-
- return 0;
}
static int nvme_setup_prp_pools(struct nvme_dev *dev)
@@ -1872,15 +2074,10 @@ static void nvme_free_dev(struct kref *kref)
{
struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref);
nvme_dev_remove(dev);
- if (dev->pci_dev->msi_enabled)
- pci_disable_msi(dev->pci_dev);
- else if (dev->pci_dev->msix_enabled)
- pci_disable_msix(dev->pci_dev);
- iounmap(dev->bar);
+ nvme_dev_shutdown(dev);
+ nvme_free_queues(dev);
nvme_release_instance(dev);
nvme_release_prp_pools(dev);
- pci_disable_device(dev->pci_dev);
- pci_release_regions(dev->pci_dev);
kfree(dev->queues);
kfree(dev->entry);
kfree(dev);
@@ -1921,9 +2118,40 @@ static const struct file_operations nvme_dev_fops = {
.compat_ioctl = nvme_dev_ioctl,
};
+static int nvme_dev_start(struct nvme_dev *dev)
+{
+ int result;
+
+ result = nvme_dev_map(dev);
+ if (result)
+ return result;
+
+ result = nvme_configure_admin_queue(dev);
+ if (result)
+ goto unmap;
+
+ spin_lock(&dev_list_lock);
+ list_add(&dev->node, &dev_list);
+ spin_unlock(&dev_list_lock);
+
+ result = nvme_setup_io_queues(dev);
+ if (result && result != -EBUSY)
+ goto disable;
+
+ return result;
+
+ disable:
+ spin_lock(&dev_list_lock);
+ list_del_init(&dev->node);
+ spin_unlock(&dev_list_lock);
+ unmap:
+ nvme_dev_unmap(dev);
+ return result;
+}
+
static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
- int bars, result = -ENOMEM;
+ int result = -ENOMEM;
struct nvme_dev *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
@@ -1938,53 +2166,28 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (!dev->queues)
goto free;
- if (pci_enable_device_mem(pdev))
- goto free;
- pci_set_master(pdev);
- bars = pci_select_bars(pdev, IORESOURCE_MEM);
- if (pci_request_selected_regions(pdev, bars, "nvme"))
- goto disable;
-
INIT_LIST_HEAD(&dev->namespaces);
dev->pci_dev = pdev;
- pci_set_drvdata(pdev, dev);
-
- if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
- dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
- else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)))
- dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
- else
- goto disable;
-
result = nvme_set_instance(dev);
if (result)
- goto disable;
-
- dev->entry[0].vector = pdev->irq;
+ goto free;
result = nvme_setup_prp_pools(dev);
if (result)
- goto disable_msix;
+ goto release;
- dev->bar = ioremap(pci_resource_start(pdev, 0), 8192);
- if (!dev->bar) {
- result = -ENOMEM;
- goto disable_msix;
+ result = nvme_dev_start(dev);
+ if (result) {
+ if (result == -EBUSY)
+ goto create_cdev;
+ goto release_pools;
}
- result = nvme_configure_admin_queue(dev);
- if (result)
- goto unmap;
- dev->queue_count++;
-
- spin_lock(&dev_list_lock);
- list_add(&dev->node, &dev_list);
- spin_unlock(&dev_list_lock);
-
result = nvme_dev_add(dev);
if (result)
- goto delete;
+ goto shutdown;
+ create_cdev:
scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance);
dev->miscdev.minor = MISC_DYNAMIC_MINOR;
dev->miscdev.parent = &pdev->dev;
@@ -1999,24 +2202,13 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
remove:
nvme_dev_remove(dev);
- delete:
- spin_lock(&dev_list_lock);
- list_del(&dev->node);
- spin_unlock(&dev_list_lock);
-
+ shutdown:
+ nvme_dev_shutdown(dev);
+ release_pools:
nvme_free_queues(dev);
- unmap:
- iounmap(dev->bar);
- disable_msix:
- if (dev->pci_dev->msi_enabled)
- pci_disable_msi(dev->pci_dev);
- else if (dev->pci_dev->msix_enabled)
- pci_disable_msix(dev->pci_dev);
- nvme_release_instance(dev);
nvme_release_prp_pools(dev);
- disable:
- pci_disable_device(pdev);
- pci_release_regions(pdev);
+ release:
+ nvme_release_instance(dev);
free:
kfree(dev->queues);
kfree(dev->entry);
@@ -2037,8 +2229,30 @@ static void nvme_remove(struct pci_dev *pdev)
#define nvme_link_reset NULL
#define nvme_slot_reset NULL
#define nvme_error_resume NULL
-#define nvme_suspend NULL
-#define nvme_resume NULL
+
+static int nvme_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct nvme_dev *ndev = pci_get_drvdata(pdev);
+
+ nvme_dev_shutdown(ndev);
+ return 0;
+}
+
+static int nvme_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct nvme_dev *ndev = pci_get_drvdata(pdev);
+ int ret;
+
+ ret = nvme_dev_start(ndev);
+ /* XXX: should remove gendisks if resume fails */
+ if (ret)
+ nvme_free_queues(ndev);
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(nvme_dev_pm_ops, nvme_suspend, nvme_resume);
static const struct pci_error_handlers nvme_err_handler = {
.error_detected = nvme_error_detected,
@@ -2062,8 +2276,9 @@ static struct pci_driver nvme_driver = {
.id_table = nvme_id_table,
.probe = nvme_probe,
.remove = nvme_remove,
- .suspend = nvme_suspend,
- .resume = nvme_resume,
+ .driver = {
+ .pm = &nvme_dev_pm_ops,
+ },
.err_handler = &nvme_err_handler,
};
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
index 102de2f..4a4ff4e 100644
--- a/drivers/block/nvme-scsi.c
+++ b/drivers/block/nvme-scsi.c
@@ -933,13 +933,12 @@ static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int res = SNTI_TRANSLATION_SUCCESS;
int xfer_len;
- inq_response = kmalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
+ inq_response = kzalloc(EXTENDED_INQUIRY_DATA_PAGE_LENGTH, GFP_KERNEL);
if (inq_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
- memset(inq_response, 0, EXTENDED_INQUIRY_DATA_PAGE_LENGTH);
inq_response[1] = INQ_BDEV_CHARACTERISTICS_PAGE; /* Page Code */
inq_response[2] = 0x00; /* Page Length MSB */
inq_response[3] = 0x3C; /* Page Length LSB */
@@ -964,12 +963,11 @@ static int nvme_trans_log_supp_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int xfer_len;
u8 *log_response;
- log_response = kmalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
+ log_response = kzalloc(LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
- memset(log_response, 0, LOG_PAGE_SUPPORTED_LOG_PAGES_LENGTH);
log_response[0] = LOG_PAGE_SUPPORTED_LOG_PAGES_PAGE;
/* Subpage=0x00, Page Length MSB=0 */
@@ -1000,12 +998,11 @@ static int nvme_trans_log_info_exceptions(struct nvme_ns *ns,
u8 temp_c;
u16 temp_k;
- log_response = kmalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
+ log_response = kzalloc(LOG_INFO_EXCP_PAGE_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
- memset(log_response, 0, LOG_INFO_EXCP_PAGE_LENGTH);
mem = dma_alloc_coherent(&dev->pci_dev->dev,
sizeof(struct nvme_smart_log),
@@ -1069,12 +1066,11 @@ static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,
u8 temp_c_cur, temp_c_thresh;
u16 temp_k;
- log_response = kmalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
+ log_response = kzalloc(LOG_TEMP_PAGE_LENGTH, GFP_KERNEL);
if (log_response == NULL) {
res = -ENOMEM;
goto out_mem;
}
- memset(log_response, 0, LOG_TEMP_PAGE_LENGTH);
mem = dma_alloc_coherent(&dev->pci_dev->dev,
sizeof(struct nvme_smart_log),
@@ -1380,12 +1376,11 @@ static int nvme_trans_mode_page_create(struct nvme_ns *ns,
blk_desc_offset = mph_size;
mode_pages_offset_1 = blk_desc_offset + blk_desc_len;
- response = kmalloc(resp_size, GFP_KERNEL);
+ response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_mem;
}
- memset(response, 0, resp_size);
res = nvme_trans_fill_mode_parm_hdr(&response[0], mph_size, cdb10,
llbaa, mode_data_length, blk_desc_len);
@@ -2480,12 +2475,11 @@ static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,
}
id_ns = mem;
- response = kmalloc(resp_size, GFP_KERNEL);
+ response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_dma;
}
- memset(response, 0, resp_size);
nvme_trans_fill_read_cap(response, id_ns, cdb16);
xfer_len = min(alloc_len, resp_size);
@@ -2554,12 +2548,11 @@ static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,
goto out_dma;
}
- response = kmalloc(resp_size, GFP_KERNEL);
+ response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out_dma;
}
- memset(response, 0, resp_size);
/* The first LUN ID will always be 0 per the SAM spec */
for (lun_id = 0; lun_id < le32_to_cpu(id_ctrl->nn); lun_id++) {
@@ -2600,12 +2593,11 @@ static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,
resp_size = ((desc_format) ? (DESC_FMT_SENSE_DATA_SIZE) :
(FIXED_FMT_SENSE_DATA_SIZE));
- response = kmalloc(resp_size, GFP_KERNEL);
+ response = kzalloc(resp_size, GFP_KERNEL);
if (response == NULL) {
res = -ENOMEM;
goto out;
}
- memset(response, 0, resp_size);
if (desc_format == DESCRIPTOR_FORMAT_SENSE_DATA_TYPE) {
/* Descriptor Format Sense Data */
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index f451c8d..26ebcf4 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -1,6 +1,6 @@
/*
* Definitions for the NVM Express interface
- * Copyright (c) 2011, Intel Corporation.
+ * Copyright (c) 2011-2013, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -19,7 +19,10 @@
#ifndef _LINUX_NVME_H
#define _LINUX_NVME_H
-#include <linux/types.h>
+#include <uapi/linux/nvme.h>
+#include <linux/pci.h>
+#include <linux/miscdevice.h>
+#include <linux/kref.h>
struct nvme_bar {
__u64 cap; /* Controller Capabilities */
@@ -50,6 +53,7 @@ enum {
NVME_CC_SHN_NONE = 0 << 14,
NVME_CC_SHN_NORMAL = 1 << 14,
NVME_CC_SHN_ABRUPT = 2 << 14,
+ NVME_CC_SHN_MASK = 3 << 14,
NVME_CC_IOSQES = 6 << 16,
NVME_CC_IOCQES = 4 << 20,
NVME_CSTS_RDY = 1 << 0,
@@ -57,462 +61,11 @@ enum {
NVME_CSTS_SHST_NORMAL = 0 << 2,
NVME_CSTS_SHST_OCCUR = 1 << 2,
NVME_CSTS_SHST_CMPLT = 2 << 2,
-};
-
-struct nvme_id_power_state {
- __le16 max_power; /* centiwatts */
- __u16 rsvd2;
- __le32 entry_lat; /* microseconds */
- __le32 exit_lat; /* microseconds */
- __u8 read_tput;
- __u8 read_lat;
- __u8 write_tput;
- __u8 write_lat;
- __u8 rsvd16[16];
+ NVME_CSTS_SHST_MASK = 3 << 2,
};
#define NVME_VS(major, minor) (major << 16 | minor)
-struct nvme_id_ctrl {
- __le16 vid;
- __le16 ssvid;
- char sn[20];
- char mn[40];
- char fr[8];
- __u8 rab;
- __u8 ieee[3];
- __u8 mic;
- __u8 mdts;
- __u8 rsvd78[178];
- __le16 oacs;
- __u8 acl;
- __u8 aerl;
- __u8 frmw;
- __u8 lpa;
- __u8 elpe;
- __u8 npss;
- __u8 rsvd264[248];
- __u8 sqes;
- __u8 cqes;
- __u8 rsvd514[2];
- __le32 nn;
- __le16 oncs;
- __le16 fuses;
- __u8 fna;
- __u8 vwc;
- __le16 awun;
- __le16 awupf;
- __u8 rsvd530[1518];
- struct nvme_id_power_state psd[32];
- __u8 vs[1024];
-};
-
-enum {
- NVME_CTRL_ONCS_COMPARE = 1 << 0,
- NVME_CTRL_ONCS_WRITE_UNCORRECTABLE = 1 << 1,
- NVME_CTRL_ONCS_DSM = 1 << 2,
-};
-
-struct nvme_lbaf {
- __le16 ms;
- __u8 ds;
- __u8 rp;
-};
-
-struct nvme_id_ns {
- __le64 nsze;
- __le64 ncap;
- __le64 nuse;
- __u8 nsfeat;
- __u8 nlbaf;
- __u8 flbas;
- __u8 mc;
- __u8 dpc;
- __u8 dps;
- __u8 rsvd30[98];
- struct nvme_lbaf lbaf[16];
- __u8 rsvd192[192];
- __u8 vs[3712];
-};
-
-enum {
- NVME_NS_FEAT_THIN = 1 << 0,
- NVME_LBAF_RP_BEST = 0,
- NVME_LBAF_RP_BETTER = 1,
- NVME_LBAF_RP_GOOD = 2,
- NVME_LBAF_RP_DEGRADED = 3,
-};
-
-struct nvme_smart_log {
- __u8 critical_warning;
- __u8 temperature[2];
- __u8 avail_spare;
- __u8 spare_thresh;
- __u8 percent_used;
- __u8 rsvd6[26];
- __u8 data_units_read[16];
- __u8 data_units_written[16];
- __u8 host_reads[16];
- __u8 host_writes[16];
- __u8 ctrl_busy_time[16];
- __u8 power_cycles[16];
- __u8 power_on_hours[16];
- __u8 unsafe_shutdowns[16];
- __u8 media_errors[16];
- __u8 num_err_log_entries[16];
- __u8 rsvd192[320];
-};
-
-enum {
- NVME_SMART_CRIT_SPARE = 1 << 0,
- NVME_SMART_CRIT_TEMPERATURE = 1 << 1,
- NVME_SMART_CRIT_RELIABILITY = 1 << 2,
- NVME_SMART_CRIT_MEDIA = 1 << 3,
- NVME_SMART_CRIT_VOLATILE_MEMORY = 1 << 4,
-};
-
-struct nvme_lba_range_type {
- __u8 type;
- __u8 attributes;
- __u8 rsvd2[14];
- __u64 slba;
- __u64 nlb;
- __u8 guid[16];
- __u8 rsvd48[16];
-};
-
-enum {
- NVME_LBART_TYPE_FS = 0x01,
- NVME_LBART_TYPE_RAID = 0x02,
- NVME_LBART_TYPE_CACHE = 0x03,
- NVME_LBART_TYPE_SWAP = 0x04,
-
- NVME_LBART_ATTRIB_TEMP = 1 << 0,
- NVME_LBART_ATTRIB_HIDE = 1 << 1,
-};
-
-/* I/O commands */
-
-enum nvme_opcode {
- nvme_cmd_flush = 0x00,
- nvme_cmd_write = 0x01,
- nvme_cmd_read = 0x02,
- nvme_cmd_write_uncor = 0x04,
- nvme_cmd_compare = 0x05,
- nvme_cmd_dsm = 0x09,
-};
-
-struct nvme_common_command {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __le32 cdw2[2];
- __le64 metadata;
- __le64 prp1;
- __le64 prp2;
- __le32 cdw10[6];
-};
-
-struct nvme_rw_command {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __u64 rsvd2;
- __le64 metadata;
- __le64 prp1;
- __le64 prp2;
- __le64 slba;
- __le16 length;
- __le16 control;
- __le32 dsmgmt;
- __le32 reftag;
- __le16 apptag;
- __le16 appmask;
-};
-
-enum {
- NVME_RW_LR = 1 << 15,
- NVME_RW_FUA = 1 << 14,
- NVME_RW_DSM_FREQ_UNSPEC = 0,
- NVME_RW_DSM_FREQ_TYPICAL = 1,
- NVME_RW_DSM_FREQ_RARE = 2,
- NVME_RW_DSM_FREQ_READS = 3,
- NVME_RW_DSM_FREQ_WRITES = 4,
- NVME_RW_DSM_FREQ_RW = 5,
- NVME_RW_DSM_FREQ_ONCE = 6,
- NVME_RW_DSM_FREQ_PREFETCH = 7,
- NVME_RW_DSM_FREQ_TEMP = 8,
- NVME_RW_DSM_LATENCY_NONE = 0 << 4,
- NVME_RW_DSM_LATENCY_IDLE = 1 << 4,
- NVME_RW_DSM_LATENCY_NORM = 2 << 4,
- NVME_RW_DSM_LATENCY_LOW = 3 << 4,
- NVME_RW_DSM_SEQ_REQ = 1 << 6,
- NVME_RW_DSM_COMPRESSED = 1 << 7,
-};
-
-struct nvme_dsm_cmd {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __u64 rsvd2[2];
- __le64 prp1;
- __le64 prp2;
- __le32 nr;
- __le32 attributes;
- __u32 rsvd12[4];
-};
-
-enum {
- NVME_DSMGMT_IDR = 1 << 0,
- NVME_DSMGMT_IDW = 1 << 1,
- NVME_DSMGMT_AD = 1 << 2,
-};
-
-struct nvme_dsm_range {
- __le32 cattr;
- __le32 nlb;
- __le64 slba;
-};
-
-/* Admin commands */
-
-enum nvme_admin_opcode {
- nvme_admin_delete_sq = 0x00,
- nvme_admin_create_sq = 0x01,
- nvme_admin_get_log_page = 0x02,
- nvme_admin_delete_cq = 0x04,
- nvme_admin_create_cq = 0x05,
- nvme_admin_identify = 0x06,
- nvme_admin_abort_cmd = 0x08,
- nvme_admin_set_features = 0x09,
- nvme_admin_get_features = 0x0a,
- nvme_admin_async_event = 0x0c,
- nvme_admin_activate_fw = 0x10,
- nvme_admin_download_fw = 0x11,
- nvme_admin_format_nvm = 0x80,
- nvme_admin_security_send = 0x81,
- nvme_admin_security_recv = 0x82,
-};
-
-enum {
- NVME_QUEUE_PHYS_CONTIG = (1 << 0),
- NVME_CQ_IRQ_ENABLED = (1 << 1),
- NVME_SQ_PRIO_URGENT = (0 << 1),
- NVME_SQ_PRIO_HIGH = (1 << 1),
- NVME_SQ_PRIO_MEDIUM = (2 << 1),
- NVME_SQ_PRIO_LOW = (3 << 1),
- NVME_FEAT_ARBITRATION = 0x01,
- NVME_FEAT_POWER_MGMT = 0x02,
- NVME_FEAT_LBA_RANGE = 0x03,
- NVME_FEAT_TEMP_THRESH = 0x04,
- NVME_FEAT_ERR_RECOVERY = 0x05,
- NVME_FEAT_VOLATILE_WC = 0x06,
- NVME_FEAT_NUM_QUEUES = 0x07,
- NVME_FEAT_IRQ_COALESCE = 0x08,
- NVME_FEAT_IRQ_CONFIG = 0x09,
- NVME_FEAT_WRITE_ATOMIC = 0x0a,
- NVME_FEAT_ASYNC_EVENT = 0x0b,
- NVME_FEAT_SW_PROGRESS = 0x0c,
- NVME_FWACT_REPL = (0 << 3),
- NVME_FWACT_REPL_ACTV = (1 << 3),
- NVME_FWACT_ACTV = (2 << 3),
-};
-
-struct nvme_identify {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __u64 rsvd2[2];
- __le64 prp1;
- __le64 prp2;
- __le32 cns;
- __u32 rsvd11[5];
-};
-
-struct nvme_features {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __u64 rsvd2[2];
- __le64 prp1;
- __le64 prp2;
- __le32 fid;
- __le32 dword11;
- __u32 rsvd12[4];
-};
-
-struct nvme_create_cq {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __u32 rsvd1[5];
- __le64 prp1;
- __u64 rsvd8;
- __le16 cqid;
- __le16 qsize;
- __le16 cq_flags;
- __le16 irq_vector;
- __u32 rsvd12[4];
-};
-
-struct nvme_create_sq {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __u32 rsvd1[5];
- __le64 prp1;
- __u64 rsvd8;
- __le16 sqid;
- __le16 qsize;
- __le16 sq_flags;
- __le16 cqid;
- __u32 rsvd12[4];
-};
-
-struct nvme_delete_queue {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __u32 rsvd1[9];
- __le16 qid;
- __u16 rsvd10;
- __u32 rsvd11[5];
-};
-
-struct nvme_download_firmware {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __u32 rsvd1[5];
- __le64 prp1;
- __le64 prp2;
- __le32 numd;
- __le32 offset;
- __u32 rsvd12[4];
-};
-
-struct nvme_format_cmd {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __u64 rsvd2[4];
- __le32 cdw10;
- __u32 rsvd11[5];
-};
-
-struct nvme_command {
- union {
- struct nvme_common_command common;
- struct nvme_rw_command rw;
- struct nvme_identify identify;
- struct nvme_features features;
- struct nvme_create_cq create_cq;
- struct nvme_create_sq create_sq;
- struct nvme_delete_queue delete_queue;
- struct nvme_download_firmware dlfw;
- struct nvme_format_cmd format;
- struct nvme_dsm_cmd dsm;
- };
-};
-
-enum {
- NVME_SC_SUCCESS = 0x0,
- NVME_SC_INVALID_OPCODE = 0x1,
- NVME_SC_INVALID_FIELD = 0x2,
- NVME_SC_CMDID_CONFLICT = 0x3,
- NVME_SC_DATA_XFER_ERROR = 0x4,
- NVME_SC_POWER_LOSS = 0x5,
- NVME_SC_INTERNAL = 0x6,
- NVME_SC_ABORT_REQ = 0x7,
- NVME_SC_ABORT_QUEUE = 0x8,
- NVME_SC_FUSED_FAIL = 0x9,
- NVME_SC_FUSED_MISSING = 0xa,
- NVME_SC_INVALID_NS = 0xb,
- NVME_SC_CMD_SEQ_ERROR = 0xc,
- NVME_SC_LBA_RANGE = 0x80,
- NVME_SC_CAP_EXCEEDED = 0x81,
- NVME_SC_NS_NOT_READY = 0x82,
- NVME_SC_CQ_INVALID = 0x100,
- NVME_SC_QID_INVALID = 0x101,
- NVME_SC_QUEUE_SIZE = 0x102,
- NVME_SC_ABORT_LIMIT = 0x103,
- NVME_SC_ABORT_MISSING = 0x104,
- NVME_SC_ASYNC_LIMIT = 0x105,
- NVME_SC_FIRMWARE_SLOT = 0x106,
- NVME_SC_FIRMWARE_IMAGE = 0x107,
- NVME_SC_INVALID_VECTOR = 0x108,
- NVME_SC_INVALID_LOG_PAGE = 0x109,
- NVME_SC_INVALID_FORMAT = 0x10a,
- NVME_SC_BAD_ATTRIBUTES = 0x180,
- NVME_SC_WRITE_FAULT = 0x280,
- NVME_SC_READ_ERROR = 0x281,
- NVME_SC_GUARD_CHECK = 0x282,
- NVME_SC_APPTAG_CHECK = 0x283,
- NVME_SC_REFTAG_CHECK = 0x284,
- NVME_SC_COMPARE_FAILED = 0x285,
- NVME_SC_ACCESS_DENIED = 0x286,
-};
-
-struct nvme_completion {
- __le32 result; /* Used by admin commands to return data */
- __u32 rsvd;
- __le16 sq_head; /* how much of this queue may be reclaimed */
- __le16 sq_id; /* submission queue that generated this entry */
- __u16 command_id; /* of the command which completed */
- __le16 status; /* did the command fail, and if so, why? */
-};
-
-struct nvme_user_io {
- __u8 opcode;
- __u8 flags;
- __u16 control;
- __u16 nblocks;
- __u16 rsvd;
- __u64 metadata;
- __u64 addr;
- __u64 slba;
- __u32 dsmgmt;
- __u32 reftag;
- __u16 apptag;
- __u16 appmask;
-};
-
-struct nvme_admin_cmd {
- __u8 opcode;
- __u8 flags;
- __u16 rsvd1;
- __u32 nsid;
- __u32 cdw2;
- __u32 cdw3;
- __u64 metadata;
- __u64 addr;
- __u32 metadata_len;
- __u32 data_len;
- __u32 cdw10;
- __u32 cdw11;
- __u32 cdw12;
- __u32 cdw13;
- __u32 cdw14;
- __u32 cdw15;
- __u32 timeout_ms;
- __u32 result;
-};
-
-#define NVME_IOCTL_ID _IO('N', 0x40)
-#define NVME_IOCTL_ADMIN_CMD _IOWR('N', 0x41, struct nvme_admin_cmd)
-#define NVME_IOCTL_SUBMIT_IO _IOW('N', 0x42, struct nvme_user_io)
-
-#ifdef __KERNEL__
-#include <linux/pci.h>
-#include <linux/miscdevice.h>
-#include <linux/kref.h>
-
#define NVME_IO_TIMEOUT (5 * HZ)
/*
@@ -553,7 +106,7 @@ struct nvme_ns {
struct request_queue *queue;
struct gendisk *disk;
- int ns_id;
+ unsigned ns_id;
int lba_shift;
int ms;
u64 mode_select_num_blocks;
@@ -572,6 +125,7 @@ struct nvme_iod {
int offset; /* Of PRP list */
int nents; /* Used in scatterlist */
int length; /* Of data, in bytes */
+ unsigned long start_time;
dma_addr_t first_dma;
struct scatterlist sg[0];
};
@@ -613,6 +167,4 @@ struct sg_io_hdr;
int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
int nvme_sg_get_version_num(int __user *ip);
-#endif
-
#endif /* _LINUX_NVME_H */
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index e7c94ee..115add2 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -284,6 +284,7 @@ header-y += nfs_mount.h
header-y += nfsacl.h
header-y += nl80211.h
header-y += nubus.h
+header-y += nvme.h
header-y += nvram.h
header-y += omap3isp.h
header-y += omapfb.h
diff --git a/include/uapi/linux/nvme.h b/include/uapi/linux/nvme.h
new file mode 100644
index 0000000..989c04e
--- /dev/null
+++ b/include/uapi/linux/nvme.h
@@ -0,0 +1,477 @@
+/*
+ * Definitions for the NVM Express interface
+ * Copyright (c) 2011-2013, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _UAPI_LINUX_NVME_H
+#define _UAPI_LINUX_NVME_H
+
+#include <linux/types.h>
+
+struct nvme_id_power_state {
+ __le16 max_power; /* centiwatts */
+ __u8 rsvd2;
+ __u8 flags;
+ __le32 entry_lat; /* microseconds */
+ __le32 exit_lat; /* microseconds */
+ __u8 read_tput;
+ __u8 read_lat;
+ __u8 write_tput;
+ __u8 write_lat;
+ __u8 rsvd16[16];
+};
+
+enum {
+ NVME_PS_FLAGS_MAX_POWER_SCALE = 1 << 0,
+ NVME_PS_FLAGS_NON_OP_STATE = 1 << 1,
+};
+
+struct nvme_id_ctrl {
+ __le16 vid;
+ __le16 ssvid;
+ char sn[20];
+ char mn[40];
+ char fr[8];
+ __u8 rab;
+ __u8 ieee[3];
+ __u8 mic;
+ __u8 mdts;
+ __u8 rsvd78[178];
+ __le16 oacs;
+ __u8 acl;
+ __u8 aerl;
+ __u8 frmw;
+ __u8 lpa;
+ __u8 elpe;
+ __u8 npss;
+ __u8 rsvd264[248];
+ __u8 sqes;
+ __u8 cqes;
+ __u8 rsvd514[2];
+ __le32 nn;
+ __le16 oncs;
+ __le16 fuses;
+ __u8 fna;
+ __u8 vwc;
+ __le16 awun;
+ __le16 awupf;
+ __u8 rsvd530[1518];
+ struct nvme_id_power_state psd[32];
+ __u8 vs[1024];
+};
+
+enum {
+ NVME_CTRL_ONCS_COMPARE = 1 << 0,
+ NVME_CTRL_ONCS_WRITE_UNCORRECTABLE = 1 << 1,
+ NVME_CTRL_ONCS_DSM = 1 << 2,
+};
+
+struct nvme_lbaf {
+ __le16 ms;
+ __u8 ds;
+ __u8 rp;
+};
+
+struct nvme_id_ns {
+ __le64 nsze;
+ __le64 ncap;
+ __le64 nuse;
+ __u8 nsfeat;
+ __u8 nlbaf;
+ __u8 flbas;
+ __u8 mc;
+ __u8 dpc;
+ __u8 dps;
+ __u8 rsvd30[98];
+ struct nvme_lbaf lbaf[16];
+ __u8 rsvd192[192];
+ __u8 vs[3712];
+};
+
+enum {
+ NVME_NS_FEAT_THIN = 1 << 0,
+ NVME_LBAF_RP_BEST = 0,
+ NVME_LBAF_RP_BETTER = 1,
+ NVME_LBAF_RP_GOOD = 2,
+ NVME_LBAF_RP_DEGRADED = 3,
+};
+
+struct nvme_smart_log {
+ __u8 critical_warning;
+ __u8 temperature[2];
+ __u8 avail_spare;
+ __u8 spare_thresh;
+ __u8 percent_used;
+ __u8 rsvd6[26];
+ __u8 data_units_read[16];
+ __u8 data_units_written[16];
+ __u8 host_reads[16];
+ __u8 host_writes[16];
+ __u8 ctrl_busy_time[16];
+ __u8 power_cycles[16];
+ __u8 power_on_hours[16];
+ __u8 unsafe_shutdowns[16];
+ __u8 media_errors[16];
+ __u8 num_err_log_entries[16];
+ __u8 rsvd192[320];
+};
+
+enum {
+ NVME_SMART_CRIT_SPARE = 1 << 0,
+ NVME_SMART_CRIT_TEMPERATURE = 1 << 1,
+ NVME_SMART_CRIT_RELIABILITY = 1 << 2,
+ NVME_SMART_CRIT_MEDIA = 1 << 3,
+ NVME_SMART_CRIT_VOLATILE_MEMORY = 1 << 4,
+};
+
+struct nvme_lba_range_type {
+ __u8 type;
+ __u8 attributes;
+ __u8 rsvd2[14];
+ __u64 slba;
+ __u64 nlb;
+ __u8 guid[16];
+ __u8 rsvd48[16];
+};
+
+enum {
+ NVME_LBART_TYPE_FS = 0x01,
+ NVME_LBART_TYPE_RAID = 0x02,
+ NVME_LBART_TYPE_CACHE = 0x03,
+ NVME_LBART_TYPE_SWAP = 0x04,
+
+ NVME_LBART_ATTRIB_TEMP = 1 << 0,
+ NVME_LBART_ATTRIB_HIDE = 1 << 1,
+};
+
+/* I/O commands */
+
+enum nvme_opcode {
+ nvme_cmd_flush = 0x00,
+ nvme_cmd_write = 0x01,
+ nvme_cmd_read = 0x02,
+ nvme_cmd_write_uncor = 0x04,
+ nvme_cmd_compare = 0x05,
+ nvme_cmd_dsm = 0x09,
+};
+
+struct nvme_common_command {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __le32 cdw2[2];
+ __le64 metadata;
+ __le64 prp1;
+ __le64 prp2;
+ __le32 cdw10[6];
+};
+
+struct nvme_rw_command {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2;
+ __le64 metadata;
+ __le64 prp1;
+ __le64 prp2;
+ __le64 slba;
+ __le16 length;
+ __le16 control;
+ __le32 dsmgmt;
+ __le32 reftag;
+ __le16 apptag;
+ __le16 appmask;
+};
+
+enum {
+ NVME_RW_LR = 1 << 15,
+ NVME_RW_FUA = 1 << 14,
+ NVME_RW_DSM_FREQ_UNSPEC = 0,
+ NVME_RW_DSM_FREQ_TYPICAL = 1,
+ NVME_RW_DSM_FREQ_RARE = 2,
+ NVME_RW_DSM_FREQ_READS = 3,
+ NVME_RW_DSM_FREQ_WRITES = 4,
+ NVME_RW_DSM_FREQ_RW = 5,
+ NVME_RW_DSM_FREQ_ONCE = 6,
+ NVME_RW_DSM_FREQ_PREFETCH = 7,
+ NVME_RW_DSM_FREQ_TEMP = 8,
+ NVME_RW_DSM_LATENCY_NONE = 0 << 4,
+ NVME_RW_DSM_LATENCY_IDLE = 1 << 4,
+ NVME_RW_DSM_LATENCY_NORM = 2 << 4,
+ NVME_RW_DSM_LATENCY_LOW = 3 << 4,
+ NVME_RW_DSM_SEQ_REQ = 1 << 6,
+ NVME_RW_DSM_COMPRESSED = 1 << 7,
+};
+
+struct nvme_dsm_cmd {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2[2];
+ __le64 prp1;
+ __le64 prp2;
+ __le32 nr;
+ __le32 attributes;
+ __u32 rsvd12[4];
+};
+
+enum {
+ NVME_DSMGMT_IDR = 1 << 0,
+ NVME_DSMGMT_IDW = 1 << 1,
+ NVME_DSMGMT_AD = 1 << 2,
+};
+
+struct nvme_dsm_range {
+ __le32 cattr;
+ __le32 nlb;
+ __le64 slba;
+};
+
+/* Admin commands */
+
+enum nvme_admin_opcode {
+ nvme_admin_delete_sq = 0x00,
+ nvme_admin_create_sq = 0x01,
+ nvme_admin_get_log_page = 0x02,
+ nvme_admin_delete_cq = 0x04,
+ nvme_admin_create_cq = 0x05,
+ nvme_admin_identify = 0x06,
+ nvme_admin_abort_cmd = 0x08,
+ nvme_admin_set_features = 0x09,
+ nvme_admin_get_features = 0x0a,
+ nvme_admin_async_event = 0x0c,
+ nvme_admin_activate_fw = 0x10,
+ nvme_admin_download_fw = 0x11,
+ nvme_admin_format_nvm = 0x80,
+ nvme_admin_security_send = 0x81,
+ nvme_admin_security_recv = 0x82,
+};
+
+enum {
+ NVME_QUEUE_PHYS_CONTIG = (1 << 0),
+ NVME_CQ_IRQ_ENABLED = (1 << 1),
+ NVME_SQ_PRIO_URGENT = (0 << 1),
+ NVME_SQ_PRIO_HIGH = (1 << 1),
+ NVME_SQ_PRIO_MEDIUM = (2 << 1),
+ NVME_SQ_PRIO_LOW = (3 << 1),
+ NVME_FEAT_ARBITRATION = 0x01,
+ NVME_FEAT_POWER_MGMT = 0x02,
+ NVME_FEAT_LBA_RANGE = 0x03,
+ NVME_FEAT_TEMP_THRESH = 0x04,
+ NVME_FEAT_ERR_RECOVERY = 0x05,
+ NVME_FEAT_VOLATILE_WC = 0x06,
+ NVME_FEAT_NUM_QUEUES = 0x07,
+ NVME_FEAT_IRQ_COALESCE = 0x08,
+ NVME_FEAT_IRQ_CONFIG = 0x09,
+ NVME_FEAT_WRITE_ATOMIC = 0x0a,
+ NVME_FEAT_ASYNC_EVENT = 0x0b,
+ NVME_FEAT_SW_PROGRESS = 0x0c,
+ NVME_FWACT_REPL = (0 << 3),
+ NVME_FWACT_REPL_ACTV = (1 << 3),
+ NVME_FWACT_ACTV = (2 << 3),
+};
+
+struct nvme_identify {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2[2];
+ __le64 prp1;
+ __le64 prp2;
+ __le32 cns;
+ __u32 rsvd11[5];
+};
+
+struct nvme_features {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2[2];
+ __le64 prp1;
+ __le64 prp2;
+ __le32 fid;
+ __le32 dword11;
+ __u32 rsvd12[4];
+};
+
+struct nvme_create_cq {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __u32 rsvd1[5];
+ __le64 prp1;
+ __u64 rsvd8;
+ __le16 cqid;
+ __le16 qsize;
+ __le16 cq_flags;
+ __le16 irq_vector;
+ __u32 rsvd12[4];
+};
+
+struct nvme_create_sq {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __u32 rsvd1[5];
+ __le64 prp1;
+ __u64 rsvd8;
+ __le16 sqid;
+ __le16 qsize;
+ __le16 sq_flags;
+ __le16 cqid;
+ __u32 rsvd12[4];
+};
+
+struct nvme_delete_queue {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __u32 rsvd1[9];
+ __le16 qid;
+ __u16 rsvd10;
+ __u32 rsvd11[5];
+};
+
+struct nvme_download_firmware {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __u32 rsvd1[5];
+ __le64 prp1;
+ __le64 prp2;
+ __le32 numd;
+ __le32 offset;
+ __u32 rsvd12[4];
+};
+
+struct nvme_format_cmd {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2[4];
+ __le32 cdw10;
+ __u32 rsvd11[5];
+};
+
+struct nvme_command {
+ union {
+ struct nvme_common_command common;
+ struct nvme_rw_command rw;
+ struct nvme_identify identify;
+ struct nvme_features features;
+ struct nvme_create_cq create_cq;
+ struct nvme_create_sq create_sq;
+ struct nvme_delete_queue delete_queue;
+ struct nvme_download_firmware dlfw;
+ struct nvme_format_cmd format;
+ struct nvme_dsm_cmd dsm;
+ };
+};
+
+enum {
+ NVME_SC_SUCCESS = 0x0,
+ NVME_SC_INVALID_OPCODE = 0x1,
+ NVME_SC_INVALID_FIELD = 0x2,
+ NVME_SC_CMDID_CONFLICT = 0x3,
+ NVME_SC_DATA_XFER_ERROR = 0x4,
+ NVME_SC_POWER_LOSS = 0x5,
+ NVME_SC_INTERNAL = 0x6,
+ NVME_SC_ABORT_REQ = 0x7,
+ NVME_SC_ABORT_QUEUE = 0x8,
+ NVME_SC_FUSED_FAIL = 0x9,
+ NVME_SC_FUSED_MISSING = 0xa,
+ NVME_SC_INVALID_NS = 0xb,
+ NVME_SC_CMD_SEQ_ERROR = 0xc,
+ NVME_SC_LBA_RANGE = 0x80,
+ NVME_SC_CAP_EXCEEDED = 0x81,
+ NVME_SC_NS_NOT_READY = 0x82,
+ NVME_SC_CQ_INVALID = 0x100,
+ NVME_SC_QID_INVALID = 0x101,
+ NVME_SC_QUEUE_SIZE = 0x102,
+ NVME_SC_ABORT_LIMIT = 0x103,
+ NVME_SC_ABORT_MISSING = 0x104,
+ NVME_SC_ASYNC_LIMIT = 0x105,
+ NVME_SC_FIRMWARE_SLOT = 0x106,
+ NVME_SC_FIRMWARE_IMAGE = 0x107,
+ NVME_SC_INVALID_VECTOR = 0x108,
+ NVME_SC_INVALID_LOG_PAGE = 0x109,
+ NVME_SC_INVALID_FORMAT = 0x10a,
+ NVME_SC_BAD_ATTRIBUTES = 0x180,
+ NVME_SC_WRITE_FAULT = 0x280,
+ NVME_SC_READ_ERROR = 0x281,
+ NVME_SC_GUARD_CHECK = 0x282,
+ NVME_SC_APPTAG_CHECK = 0x283,
+ NVME_SC_REFTAG_CHECK = 0x284,
+ NVME_SC_COMPARE_FAILED = 0x285,
+ NVME_SC_ACCESS_DENIED = 0x286,
+};
+
+struct nvme_completion {
+ __le32 result; /* Used by admin commands to return data */
+ __u32 rsvd;
+ __le16 sq_head; /* how much of this queue may be reclaimed */
+ __le16 sq_id; /* submission queue that generated this entry */
+ __u16 command_id; /* of the command which completed */
+ __le16 status; /* did the command fail, and if so, why? */
+};
+
+struct nvme_user_io {
+ __u8 opcode;
+ __u8 flags;
+ __u16 control;
+ __u16 nblocks;
+ __u16 rsvd;
+ __u64 metadata;
+ __u64 addr;
+ __u64 slba;
+ __u32 dsmgmt;
+ __u32 reftag;
+ __u16 apptag;
+ __u16 appmask;
+};
+
+struct nvme_admin_cmd {
+ __u8 opcode;
+ __u8 flags;
+ __u16 rsvd1;
+ __u32 nsid;
+ __u32 cdw2;
+ __u32 cdw3;
+ __u64 metadata;
+ __u64 addr;
+ __u32 metadata_len;
+ __u32 data_len;
+ __u32 cdw10;
+ __u32 cdw11;
+ __u32 cdw12;
+ __u32 cdw13;
+ __u32 cdw14;
+ __u32 cdw15;
+ __u32 timeout_ms;
+ __u32 result;
+};
+
+#define NVME_IOCTL_ID _IO('N', 0x40)
+#define NVME_IOCTL_ADMIN_CMD _IOWR('N', 0x41, struct nvme_admin_cmd)
+#define NVME_IOCTL_SUBMIT_IO _IOW('N', 0x42, struct nvme_user_io)
+
+#endif /* _UAPI_LINUX_NVME_H */
generated by cgit v0.10.2 at 2024-11-12 05:29:34 (GMT)