Commit 52b084d3 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-4.3/drivers' of git://git.kernel.dk/linux-block 

Pull block driver updates from Jens Axboe:
 "On top of the 4.3 core block IO changes, here are the driver related
  changes for 4.3.  Basically just NVMe and nbd this time around:

   - NVMe:
      - PRACT PI improvement from Alok Pandey.
      - Cleanups and improvements on submission queue doorbell and
        writing, using CMB if available.  From Jon Derrick.
      - From Keith, support for setting queue maximum segments, and
        reset support.
      - Also from Jon, fixup of u64 division issue on 32-bit archs and
        wiring up of the reset support through and ioctl.
      - Two small cleanups from Matias and Sunad

  - Various code cleanups and fixes from Markus Pargmann"

* 'for-4.3/drivers' of git://git.kernel.dk/linux-block:
  NVMe: Using PRACT bit to generate and verify PI by controller
  NVMe:Remove unreachable code in nvme_abort_req
  NVMe: Add nvme subsystem reset IOCTL
  NVMe: Add nvme subsystem reset support
  NVMe: removed unused nn var from nvme_dev_add
  NVMe: Set queue max segments
  nbd: flags is a u32 variable
  nbd: Rename functions for clearness of recv/send path
  nbd: Change 'disconnect' to be boolean
  nbd: Add debugfs entries
  nbd: Remove variable 'pid'
  nbd: Move clear queue debug message
  nbd: Remove 'harderror' and propagate error properly
  nbd: restructure sock_shutdown
  nbd: sock_shutdown, remove conditional lock
  nbd: Fix timeout detection
  nvme: Fixes u64 division which breaks i386 builds
  NVMe: Use CMB for the IO SQes if available
  NVMe: Unify SQ entry writing and doorbell ringing
parents 1081230b e19b127f

drivers/block/nbd.c

+290 −72
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#include <linux/net.h>

#include <linux/kthread.h>

#include <linux/types.h>

#include <linux/debugfs.h>



#include <asm/uaccess.h>

#include <asm/types.h>
@@ -40,8 +41,7 @@ 
#include <linux/nbd.h>



struct nbd_device {

	int flags;

	int harderror;		/* Code of hard error			*/

	u32 flags;

	struct socket * sock;	/* If == NULL, device is not ready, yet	*/

	int magic;
@@ -56,11 +56,24 @@ struct nbd_device { 
	struct gendisk *disk;

	int blksize;

	loff_t bytesize;

	pid_t pid; /* pid of nbd-client, if attached */

	int xmit_timeout;

	int disconnect; /* a disconnect has been requested by user */

	bool disconnect; /* a disconnect has been requested by user */



	struct timer_list timeout_timer;

	struct task_struct *task_recv;

	struct task_struct *task_send;



#if IS_ENABLED(CONFIG_DEBUG_FS)

	struct dentry *dbg_dir;

#endif

};



#if IS_ENABLED(CONFIG_DEBUG_FS)

static struct dentry *nbd_dbg_dir;

#endif



#define nbd_name(nbd) ((nbd)->disk->disk_name)



#define NBD_MAGIC 0x68797548



static unsigned int nbds_max = 16;
@@ -113,26 +126,36 @@ static void nbd_end_request(struct nbd_device *nbd, struct request *req) 
/*

 * Forcibly shutdown the socket causing all listeners to error

 */

static void sock_shutdown(struct nbd_device *nbd, int lock)

static void sock_shutdown(struct nbd_device *nbd)

{

	if (lock)

		mutex_lock(&nbd->tx_lock);

	if (nbd->sock) {

	if (!nbd->sock)

		return;



	dev_warn(disk_to_dev(nbd->disk), "shutting down socket\n");

	kernel_sock_shutdown(nbd->sock, SHUT_RDWR);

	nbd->sock = NULL;

	}

	if (lock)

		mutex_unlock(&nbd->tx_lock);

	del_timer_sync(&nbd->timeout_timer);

}



static void nbd_xmit_timeout(unsigned long arg)

{

	struct task_struct *task = (struct task_struct *)arg;

	struct nbd_device *nbd = (struct nbd_device *)arg;

	struct task_struct *task;



	if (list_empty(&nbd->queue_head))

		return;



	nbd->disconnect = true;



	printk(KERN_WARNING "nbd: killing hung xmit (%s, pid: %d)\n",

		task->comm, task->pid);

	task = READ_ONCE(nbd->task_recv);

	if (task)

		force_sig(SIGKILL, task);



	task = READ_ONCE(nbd->task_send);

	if (task)

		force_sig(SIGKILL, nbd->task_send);



	dev_err(nbd_to_dev(nbd), "Connection timed out, killed receiver and sender, shutting down connection\n");

}



/*
@@ -171,33 +194,12 @@ static int sock_xmit(struct nbd_device *nbd, int send, void *buf, int size, 
		msg.msg_controllen = 0;

		msg.msg_flags = msg_flags | MSG_NOSIGNAL;



		if (send) {

			struct timer_list ti;



			if (nbd->xmit_timeout) {

				init_timer(&ti);

				ti.function = nbd_xmit_timeout;

				ti.data = (unsigned long)current;

				ti.expires = jiffies + nbd->xmit_timeout;

				add_timer(&ti);

			}

		if (send)

			result = kernel_sendmsg(sock, &msg, &iov, 1, size);

			if (nbd->xmit_timeout)

				del_timer_sync(&ti);

		} else

		else

			result = kernel_recvmsg(sock, &msg, &iov, 1, size,

						msg.msg_flags);



		if (signal_pending(current)) {

			siginfo_t info;

			printk(KERN_WARNING "nbd (pid %d: %s) got signal %d\n",

				task_pid_nr(current), current->comm,

				dequeue_signal_lock(current, &current->blocked, &info));

			result = -EINTR;

			sock_shutdown(nbd, !send);

			break;

		}



		if (result <= 0) {

			if (result == 0)

				result = -EPIPE; /* short read */
@@ -210,6 +212,9 @@ static int sock_xmit(struct nbd_device *nbd, int send, void *buf, int size, 
	sigprocmask(SIG_SETMASK, &oldset, NULL);

	tsk_restore_flags(current, pflags, PF_MEMALLOC);



	if (!send && nbd->xmit_timeout)

		mod_timer(&nbd->timeout_timer, jiffies + nbd->xmit_timeout);



	return result;

}
@@ -333,26 +338,24 @@ static struct request *nbd_read_stat(struct nbd_device *nbd) 
	if (result <= 0) {

		dev_err(disk_to_dev(nbd->disk),

			"Receive control failed (result %d)\n", result);

		goto harderror;

		return ERR_PTR(result);

	}



	if (ntohl(reply.magic) != NBD_REPLY_MAGIC) {

		dev_err(disk_to_dev(nbd->disk), "Wrong magic (0x%lx)\n",

				(unsigned long)ntohl(reply.magic));

		result = -EPROTO;

		goto harderror;

		return ERR_PTR(-EPROTO);

	}



	req = nbd_find_request(nbd, *(struct request **)reply.handle);

	if (IS_ERR(req)) {

		result = PTR_ERR(req);

		if (result != -ENOENT)

			goto harderror;

			return ERR_PTR(result);



		dev_err(disk_to_dev(nbd->disk), "Unexpected reply (%p)\n",

			reply.handle);

		result = -EBADR;

		goto harderror;

		return ERR_PTR(-EBADR);

	}



	if (ntohl(reply.error)) {
@@ -380,18 +383,15 @@ static struct request *nbd_read_stat(struct nbd_device *nbd) 
		}

	}

	return req;

harderror:

	nbd->harderror = result;

	return NULL;

}



static ssize_t pid_show(struct device *dev,

			struct device_attribute *attr, char *buf)

{

	struct gendisk *disk = dev_to_disk(dev);

	struct nbd_device *nbd = (struct nbd_device *)disk->private_data;



	return sprintf(buf, "%ld\n",

		(long) ((struct nbd_device *)disk->private_data)->pid);

	return sprintf(buf, "%d\n", task_pid_nr(nbd->task_recv));

}



static struct device_attribute pid_attr = {
@@ -399,7 +399,7 @@ static struct device_attribute pid_attr = { 
	.show = pid_show,

};



static int nbd_do_it(struct nbd_device *nbd)

static int nbd_thread_recv(struct nbd_device *nbd)

{

	struct request *req;

	int ret;
@@ -407,20 +407,43 @@ static int nbd_do_it(struct nbd_device *nbd) 
	BUG_ON(nbd->magic != NBD_MAGIC);



	sk_set_memalloc(nbd->sock->sk);

	nbd->pid = task_pid_nr(current);



	nbd->task_recv = current;



	ret = device_create_file(disk_to_dev(nbd->disk), &pid_attr);

	if (ret) {

		dev_err(disk_to_dev(nbd->disk), "device_create_file failed!\n");

		nbd->pid = 0;

		nbd->task_recv = NULL;

		return ret;

	}



	while ((req = nbd_read_stat(nbd)) != NULL)

	while (1) {

		req = nbd_read_stat(nbd);

		if (IS_ERR(req)) {

			ret = PTR_ERR(req);

			break;

		}



		nbd_end_request(nbd, req);

	}



	device_remove_file(disk_to_dev(nbd->disk), &pid_attr);

	nbd->pid = 0;

	return 0;



	nbd->task_recv = NULL;



	if (signal_pending(current)) {

		siginfo_t info;



		ret = dequeue_signal_lock(current, &current->blocked, &info);

		dev_warn(nbd_to_dev(nbd), "pid %d, %s, got signal %d\n",

			 task_pid_nr(current), current->comm, ret);

		mutex_lock(&nbd->tx_lock);

		sock_shutdown(nbd);

		mutex_unlock(&nbd->tx_lock);

		ret = -ETIMEDOUT;

	}



	return ret;

}



static void nbd_clear_que(struct nbd_device *nbd)
@@ -455,6 +478,7 @@ static void nbd_clear_que(struct nbd_device *nbd) 
		req->errors++;

		nbd_end_request(nbd, req);

	}

	dev_dbg(disk_to_dev(nbd->disk), "queue cleared\n");

}
@@ -482,6 +506,9 @@ static void nbd_handle_req(struct nbd_device *nbd, struct request *req) 


	nbd->active_req = req;



	if (nbd->xmit_timeout && list_empty_careful(&nbd->queue_head))

		mod_timer(&nbd->timeout_timer, jiffies + nbd->xmit_timeout);



	if (nbd_send_req(nbd, req) != 0) {

		dev_err(disk_to_dev(nbd->disk), "Request send failed\n");

		req->errors++;
@@ -503,11 +530,13 @@ error_out: 
	nbd_end_request(nbd, req);

}



static int nbd_thread(void *data)

static int nbd_thread_send(void *data)

{

	struct nbd_device *nbd = data;

	struct request *req;



	nbd->task_send = current;



	set_user_nice(current, MIN_NICE);

	while (!kthread_should_stop() || !list_empty(&nbd->waiting_queue)) {

		/* wait for something to do */
@@ -515,6 +544,20 @@ static int nbd_thread(void *data) 
					 kthread_should_stop() ||

					 !list_empty(&nbd->waiting_queue));



		if (signal_pending(current)) {

			siginfo_t info;

			int ret;



			ret = dequeue_signal_lock(current, &current->blocked,

						  &info);

			dev_warn(nbd_to_dev(nbd), "pid %d, %s, got signal %d\n",

				 task_pid_nr(current), current->comm, ret);

			mutex_lock(&nbd->tx_lock);

			sock_shutdown(nbd);

			mutex_unlock(&nbd->tx_lock);

			break;

		}



		/* extract request */

		if (list_empty(&nbd->waiting_queue))

			continue;
@@ -528,6 +571,9 @@ static int nbd_thread(void *data) 
		/* handle request */

		nbd_handle_req(nbd, req);

	}



	nbd->task_send = NULL;



	return 0;

}
@@ -538,7 +584,7 @@ static int nbd_thread(void *data) 
 *   { printk( "Warning: Ignoring result!\n"); nbd_end_request( req ); }

 */



static void do_nbd_request(struct request_queue *q)

static void nbd_request_handler(struct request_queue *q)

		__releases(q->queue_lock) __acquires(q->queue_lock)

{

	struct request *req;
@@ -574,6 +620,9 @@ static void do_nbd_request(struct request_queue *q) 
	}

}



static int nbd_dev_dbg_init(struct nbd_device *nbd);

static void nbd_dev_dbg_close(struct nbd_device *nbd);



/* Must be called with tx_lock held */



static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
@@ -597,7 +646,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 
		if (!nbd->sock)

			return -EINVAL;



		nbd->disconnect = 1;

		nbd->disconnect = true;



		nbd_send_req(nbd, &sreq);

		return 0;
@@ -625,7 +674,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 
			nbd->sock = sock;

			if (max_part > 0)

				bdev->bd_invalidated = 1;

			nbd->disconnect = 0; /* we're connected now */

			nbd->disconnect = false; /* we're connected now */

			return 0;

		}

		return -EINVAL;
@@ -648,6 +697,12 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 


	case NBD_SET_TIMEOUT:

		nbd->xmit_timeout = arg * HZ;

		if (arg)

			mod_timer(&nbd->timeout_timer,

				  jiffies + nbd->xmit_timeout);

		else

			del_timer_sync(&nbd->timeout_timer);



		return 0;



	case NBD_SET_FLAGS:
@@ -666,7 +721,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 
		struct socket *sock;

		int error;



		if (nbd->pid)

		if (nbd->task_recv)

			return -EBUSY;

		if (!nbd->sock)

			return -EINVAL;
@@ -683,24 +738,24 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 
		else

			blk_queue_flush(nbd->disk->queue, 0);



		thread = kthread_run(nbd_thread, nbd, "%s",

				     nbd->disk->disk_name);

		thread = kthread_run(nbd_thread_send, nbd, "%s",

				     nbd_name(nbd));

		if (IS_ERR(thread)) {

			mutex_lock(&nbd->tx_lock);

			return PTR_ERR(thread);

		}



		error = nbd_do_it(nbd);

		nbd_dev_dbg_init(nbd);

		error = nbd_thread_recv(nbd);

		nbd_dev_dbg_close(nbd);

		kthread_stop(thread);



		mutex_lock(&nbd->tx_lock);

		if (error)

			return error;

		sock_shutdown(nbd, 0);



		sock_shutdown(nbd);

		sock = nbd->sock;

		nbd->sock = NULL;

		nbd_clear_que(nbd);

		dev_warn(disk_to_dev(nbd->disk), "queue cleared\n");

		kill_bdev(bdev);

		queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue);

		set_device_ro(bdev, false);
@@ -714,7 +769,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 
			blkdev_reread_part(bdev);

		if (nbd->disconnect) /* user requested, ignore socket errors */

			return 0;

		return nbd->harderror;

		return error;

	}



	case NBD_CLEAR_QUE:
@@ -758,6 +813,161 @@ static const struct block_device_operations nbd_fops = 
	.ioctl =	nbd_ioctl,

};



#if IS_ENABLED(CONFIG_DEBUG_FS)



static int nbd_dbg_tasks_show(struct seq_file *s, void *unused)

{

	struct nbd_device *nbd = s->private;



	if (nbd->task_recv)

		seq_printf(s, "recv: %d\n", task_pid_nr(nbd->task_recv));

	if (nbd->task_send)

		seq_printf(s, "send: %d\n", task_pid_nr(nbd->task_send));



	return 0;

}



static int nbd_dbg_tasks_open(struct inode *inode, struct file *file)

{

	return single_open(file, nbd_dbg_tasks_show, inode->i_private);

}



static const struct file_operations nbd_dbg_tasks_ops = {

	.open = nbd_dbg_tasks_open,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = single_release,

};



static int nbd_dbg_flags_show(struct seq_file *s, void *unused)

{

	struct nbd_device *nbd = s->private;

	u32 flags = nbd->flags;



	seq_printf(s, "Hex: 0x%08x\n\n", flags);



	seq_puts(s, "Known flags:\n");



	if (flags & NBD_FLAG_HAS_FLAGS)

		seq_puts(s, "NBD_FLAG_HAS_FLAGS\n");

	if (flags & NBD_FLAG_READ_ONLY)

		seq_puts(s, "NBD_FLAG_READ_ONLY\n");

	if (flags & NBD_FLAG_SEND_FLUSH)

		seq_puts(s, "NBD_FLAG_SEND_FLUSH\n");

	if (flags & NBD_FLAG_SEND_TRIM)

		seq_puts(s, "NBD_FLAG_SEND_TRIM\n");



	return 0;

}



static int nbd_dbg_flags_open(struct inode *inode, struct file *file)

{

	return single_open(file, nbd_dbg_flags_show, inode->i_private);

}



static const struct file_operations nbd_dbg_flags_ops = {

	.open = nbd_dbg_flags_open,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = single_release,

};



static int nbd_dev_dbg_init(struct nbd_device *nbd)

{

	struct dentry *dir;

	struct dentry *f;



	dir = debugfs_create_dir(nbd_name(nbd), nbd_dbg_dir);

	if (IS_ERR_OR_NULL(dir)) {

		dev_err(nbd_to_dev(nbd), "Failed to create debugfs dir for '%s' (%ld)\n",

			nbd_name(nbd), PTR_ERR(dir));

		return PTR_ERR(dir);

	}

	nbd->dbg_dir = dir;



	f = debugfs_create_file("tasks", 0444, dir, nbd, &nbd_dbg_tasks_ops);

	if (IS_ERR_OR_NULL(f)) {

		dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'tasks', %ld\n",

			PTR_ERR(f));

		return PTR_ERR(f);

	}



	f = debugfs_create_u64("size_bytes", 0444, dir, &nbd->bytesize);

	if (IS_ERR_OR_NULL(f)) {

		dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'size_bytes', %ld\n",

			PTR_ERR(f));

		return PTR_ERR(f);

	}



	f = debugfs_create_u32("timeout", 0444, dir, &nbd->xmit_timeout);

	if (IS_ERR_OR_NULL(f)) {

		dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'timeout', %ld\n",

			PTR_ERR(f));

		return PTR_ERR(f);

	}



	f = debugfs_create_u32("blocksize", 0444, dir, &nbd->blksize);

	if (IS_ERR_OR_NULL(f)) {

		dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'blocksize', %ld\n",

			PTR_ERR(f));

		return PTR_ERR(f);

	}



	f = debugfs_create_file("flags", 0444, dir, &nbd, &nbd_dbg_flags_ops);

	if (IS_ERR_OR_NULL(f)) {

		dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'flags', %ld\n",

			PTR_ERR(f));

		return PTR_ERR(f);

	}



	return 0;

}



static void nbd_dev_dbg_close(struct nbd_device *nbd)

{

	debugfs_remove_recursive(nbd->dbg_dir);

}



static int nbd_dbg_init(void)

{

	struct dentry *dbg_dir;



	dbg_dir = debugfs_create_dir("nbd", NULL);

	if (IS_ERR(dbg_dir))

		return PTR_ERR(dbg_dir);



	nbd_dbg_dir = dbg_dir;



	return 0;

}



static void nbd_dbg_close(void)

{

	debugfs_remove_recursive(nbd_dbg_dir);

}



#else  /* IS_ENABLED(CONFIG_DEBUG_FS) */



static int nbd_dev_dbg_init(struct nbd_device *nbd)

{

	return 0;

}



static void nbd_dev_dbg_close(struct nbd_device *nbd)

{

}



static int nbd_dbg_init(void)

{

	return 0;

}



static void nbd_dbg_close(void)

{

}



#endif



/*

 * And here should be modules and kernel interface 

 *  (Just smiley confuses emacs :-)
@@ -811,7 +1021,7 @@ static int __init nbd_init(void) 
		 * every gendisk to have its very own request_queue struct.

		 * These structs are big so we dynamically allocate them.

		 */

		disk->queue = blk_init_queue(do_nbd_request, &nbd_lock);

		disk->queue = blk_init_queue(nbd_request_handler, &nbd_lock);

		if (!disk->queue) {

			put_disk(disk);

			goto out;
@@ -835,6 +1045,8 @@ static int __init nbd_init(void) 


	printk(KERN_INFO "nbd: registered device at major %d\n", NBD_MAJOR);



	nbd_dbg_init();



	for (i = 0; i < nbds_max; i++) {

		struct gendisk *disk = nbd_dev[i].disk;

		nbd_dev[i].magic = NBD_MAGIC;
@@ -842,6 +1054,9 @@ static int __init nbd_init(void) 
		spin_lock_init(&nbd_dev[i].queue_lock);

		INIT_LIST_HEAD(&nbd_dev[i].queue_head);

		mutex_init(&nbd_dev[i].tx_lock);

		init_timer(&nbd_dev[i].timeout_timer);

		nbd_dev[i].timeout_timer.function = nbd_xmit_timeout;

		nbd_dev[i].timeout_timer.data = (unsigned long)&nbd_dev[i];

		init_waitqueue_head(&nbd_dev[i].active_wq);

		init_waitqueue_head(&nbd_dev[i].waiting_wq);

		nbd_dev[i].blksize = 1024;
@@ -868,6 +1083,9 @@ out: 
static void __exit nbd_cleanup(void)

{

	int i;



	nbd_dbg_close();



	for (i = 0; i < nbds_max; i++) {

		struct gendisk *disk = nbd_dev[i].disk;

		nbd_dev[i].magic = 0;

drivers/block/nvme-core.c

+194 −73

File changed.

Preview size limit exceeded, changes collapsed.

include/linux/nvme.h

+21 −1
Original line number Diff line number Diff line
@@ -28,18 +28,32 @@ struct nvme_bar { 
	__u32			cc;	/* Controller Configuration */

	__u32			rsvd1;	/* Reserved */

	__u32			csts;	/* Controller Status */

	__u32			rsvd2;	/* Reserved */

	__u32			nssr;	/* Subsystem Reset */

	__u32			aqa;	/* Admin Queue Attributes */

	__u64			asq;	/* Admin SQ Base Address */

	__u64			acq;	/* Admin CQ Base Address */

	__u32			cmbloc; /* Controller Memory Buffer Location */

	__u32			cmbsz;  /* Controller Memory Buffer Size */

};



#define NVME_CAP_MQES(cap)	((cap) & 0xffff)

#define NVME_CAP_TIMEOUT(cap)	(((cap) >> 24) & 0xff)

#define NVME_CAP_STRIDE(cap)	(((cap) >> 32) & 0xf)

#define NVME_CAP_NSSRC(cap)	(((cap) >> 36) & 0x1)

#define NVME_CAP_MPSMIN(cap)	(((cap) >> 48) & 0xf)

#define NVME_CAP_MPSMAX(cap)	(((cap) >> 52) & 0xf)



#define NVME_CMB_BIR(cmbloc)	((cmbloc) & 0x7)

#define NVME_CMB_OFST(cmbloc)	(((cmbloc) >> 12) & 0xfffff)

#define NVME_CMB_SZ(cmbsz)	(((cmbsz) >> 12) & 0xfffff)

#define NVME_CMB_SZU(cmbsz)	(((cmbsz) >> 8) & 0xf)



#define NVME_CMB_WDS(cmbsz)	((cmbsz) & 0x10)

#define NVME_CMB_RDS(cmbsz)	((cmbsz) & 0x8)

#define NVME_CMB_LISTS(cmbsz)	((cmbsz) & 0x4)

#define NVME_CMB_CQS(cmbsz)	((cmbsz) & 0x2)

#define NVME_CMB_SQS(cmbsz)	((cmbsz) & 0x1)



enum {

	NVME_CC_ENABLE		= 1 << 0,

	NVME_CC_CSS_NVM		= 0 << 4,
@@ -55,6 +69,7 @@ enum { 
	NVME_CC_IOCQES		= 4 << 20,

	NVME_CSTS_RDY		= 1 << 0,

	NVME_CSTS_CFS		= 1 << 1,

	NVME_CSTS_NSSRO		= 1 << 4,

	NVME_CSTS_SHST_NORMAL	= 0 << 2,

	NVME_CSTS_SHST_OCCUR	= 1 << 2,

	NVME_CSTS_SHST_CMPLT	= 2 << 2,
@@ -97,9 +112,14 @@ struct nvme_dev { 
	char serial[20];

	char model[40];

	char firmware_rev[8];

	bool subsystem;

	u32 max_hw_sectors;

	u32 stripe_size;

	u32 page_size;

	void __iomem *cmb;

	dma_addr_t cmb_dma_addr;

	u64 cmb_size;

	u32 cmbsz;

	u16 oncs;

	u16 abort_limit;

	u8 event_limit;

include/uapi/linux/nvme.h

+1 −0
Original line number Diff line number Diff line
@@ -584,5 +584,6 @@ struct nvme_passthru_cmd { 
#define NVME_IOCTL_SUBMIT_IO	_IOW('N', 0x42, struct nvme_user_io)

#define NVME_IOCTL_IO_CMD	_IOWR('N', 0x43, struct nvme_passthru_cmd)

#define NVME_IOCTL_RESET	_IO('N', 0x44)

#define NVME_IOCTL_SUBSYS_RESET	_IO('N', 0x45)



#endif /* _UAPI_LINUX_NVME_H */

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