[PATCH 15/23] nvme: move block_device_operations and ns/ctrl freeing to common code
Christoph Hellwig
hch at lst.de
Mon Nov 30 00:36:25 PST 2015
This moves the block_device_operations over to common code mostly
as-is. The only change is that the ns and ctrl refcounting got some
small refcounting to have wrappers around the kref_put operations.
A new free_ctrl operation is added to allow the PCI driver to free
it's ressources on the final drop.
Signed-off-by: Christoph Hellwig <hch at lst.de>
[Moved the integrity and pr changes due to merge conflict]
Signed-off-by: Keith Busch <keith.busch at intel.com>
---
drivers/nvme/host/core.c | 413 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/nvme/host/nvme.h | 14 ++
drivers/nvme/host/pci.c | 412 ++--------------------------------------------
3 files changed, 439 insertions(+), 400 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index cc28150..63ec86a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -15,12 +15,55 @@
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/errno.h>
+#include <linux/hdreg.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/types.h>
+#include <linux/pr.h>
+#include <linux/ptrace.h>
+#include <linux/nvme_ioctl.h>
+#include <linux/t10-pi.h>
+#include <scsi/sg.h>
+#include <asm/unaligned.h>
#include "nvme.h"
+DEFINE_SPINLOCK(dev_list_lock);
+
+static void nvme_free_ns(struct kref *kref)
+{
+ struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref);
+
+ if (ns->type == NVME_NS_LIGHTNVM)
+ nvme_nvm_unregister(ns->queue, ns->disk->disk_name);
+
+ spin_lock(&dev_list_lock);
+ ns->disk->private_data = NULL;
+ spin_unlock(&dev_list_lock);
+
+ nvme_put_ctrl(ns->ctrl);
+ put_disk(ns->disk);
+ kfree(ns);
+}
+
+void nvme_put_ns(struct nvme_ns *ns)
+{
+ kref_put(&ns->kref, nvme_free_ns);
+}
+
+static struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk)
+{
+ struct nvme_ns *ns;
+
+ spin_lock(&dev_list_lock);
+ ns = disk->private_data;
+ if (ns && !kref_get_unless_zero(&ns->kref))
+ ns = NULL;
+ spin_unlock(&dev_list_lock);
+
+ return ns;
+}
+
struct request *nvme_alloc_request(struct request_queue *q,
struct nvme_command *cmd, unsigned int flags)
{
@@ -269,3 +312,373 @@ int nvme_get_log_page(struct nvme_ctrl *dev, struct nvme_smart_log **log)
kfree(*log);
return error;
}
+
+static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
+{
+ struct nvme_user_io io;
+ struct nvme_command c;
+ unsigned length, meta_len;
+ void __user *metadata;
+
+ if (copy_from_user(&io, uio, sizeof(io)))
+ return -EFAULT;
+
+ switch (io.opcode) {
+ case nvme_cmd_write:
+ case nvme_cmd_read:
+ case nvme_cmd_compare:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ length = (io.nblocks + 1) << ns->lba_shift;
+ meta_len = (io.nblocks + 1) * ns->ms;
+ metadata = (void __user *)(uintptr_t)io.metadata;
+
+ if (ns->ext) {
+ length += meta_len;
+ meta_len = 0;
+ } else if (meta_len) {
+ if ((io.metadata & 3) || !io.metadata)
+ return -EINVAL;
+ }
+
+ memset(&c, 0, sizeof(c));
+ c.rw.opcode = io.opcode;
+ c.rw.flags = io.flags;
+ c.rw.nsid = cpu_to_le32(ns->ns_id);
+ c.rw.slba = cpu_to_le64(io.slba);
+ c.rw.length = cpu_to_le16(io.nblocks);
+ c.rw.control = cpu_to_le16(io.control);
+ c.rw.dsmgmt = cpu_to_le32(io.dsmgmt);
+ c.rw.reftag = cpu_to_le32(io.reftag);
+ c.rw.apptag = cpu_to_le16(io.apptag);
+ c.rw.appmask = cpu_to_le16(io.appmask);
+
+ return __nvme_submit_user_cmd(ns->queue, &c,
+ (void __user *)(uintptr_t)io.addr, length,
+ metadata, meta_len, io.slba, NULL, 0);
+}
+
+int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+ struct nvme_passthru_cmd __user *ucmd)
+{
+ struct nvme_passthru_cmd cmd;
+ struct nvme_command c;
+ unsigned timeout = 0;
+ int status;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (copy_from_user(&cmd, ucmd, sizeof(cmd)))
+ return -EFAULT;
+
+ memset(&c, 0, sizeof(c));
+ c.common.opcode = cmd.opcode;
+ c.common.flags = cmd.flags;
+ c.common.nsid = cpu_to_le32(cmd.nsid);
+ c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
+ c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
+ c.common.cdw10[0] = cpu_to_le32(cmd.cdw10);
+ c.common.cdw10[1] = cpu_to_le32(cmd.cdw11);
+ c.common.cdw10[2] = cpu_to_le32(cmd.cdw12);
+ c.common.cdw10[3] = cpu_to_le32(cmd.cdw13);
+ c.common.cdw10[4] = cpu_to_le32(cmd.cdw14);
+ c.common.cdw10[5] = cpu_to_le32(cmd.cdw15);
+
+ if (cmd.timeout_ms)
+ timeout = msecs_to_jiffies(cmd.timeout_ms);
+
+ status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
+ (void __user *)cmd.addr, cmd.data_len,
+ &cmd.result, timeout);
+ if (status >= 0) {
+ if (put_user(cmd.result, &ucmd->result))
+ return -EFAULT;
+ }
+
+ return status;
+}
+
+static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
+{
+ struct nvme_ns *ns = bdev->bd_disk->private_data;
+
+ switch (cmd) {
+ case NVME_IOCTL_ID:
+ force_successful_syscall_return();
+ return ns->ns_id;
+ case NVME_IOCTL_ADMIN_CMD:
+ return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg);
+ case NVME_IOCTL_IO_CMD:
+ return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg);
+ case NVME_IOCTL_SUBMIT_IO:
+ return nvme_submit_io(ns, (void __user *)arg);
+ case SG_GET_VERSION_NUM:
+ return nvme_sg_get_version_num((void __user *)arg);
+ case SG_IO:
+ return nvme_sg_io(ns, (void __user *)arg);
+ default:
+ return -ENOTTY;
+ }
+}
+
+#ifdef CONFIG_COMPAT
+static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case SG_IO:
+ return -ENOIOCTLCMD;
+ }
+ return nvme_ioctl(bdev, mode, cmd, arg);
+}
+#else
+#define nvme_compat_ioctl NULL
+#endif
+
+static int nvme_open(struct block_device *bdev, fmode_t mode)
+{
+ return nvme_get_ns_from_disk(bdev->bd_disk) ? 0 : -ENXIO;
+}
+
+static void nvme_release(struct gendisk *disk, fmode_t mode)
+{
+ nvme_put_ns(disk->private_data);
+}
+
+static int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+ /* some standard values */
+ geo->heads = 1 << 6;
+ geo->sectors = 1 << 5;
+ geo->cylinders = get_capacity(bdev->bd_disk) >> 11;
+ return 0;
+}
+
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static void nvme_init_integrity(struct nvme_ns *ns)
+{
+ struct blk_integrity integrity;
+
+ switch (ns->pi_type) {
+ case NVME_NS_DPS_PI_TYPE3:
+ integrity.profile = &t10_pi_type3_crc;
+ break;
+ case NVME_NS_DPS_PI_TYPE1:
+ case NVME_NS_DPS_PI_TYPE2:
+ integrity.profile = &t10_pi_type1_crc;
+ break;
+ default:
+ integrity.profile = NULL;
+ break;
+ }
+ integrity.tuple_size = ns->ms;
+ blk_integrity_register(ns->disk, &integrity);
+ blk_queue_max_integrity_segments(ns->queue, 1);
+}
+#else
+static void nvme_init_integrity(struct nvme_ns *ns)
+{
+}
+#endif /* CONFIG_BLK_DEV_INTEGRITY */
+
+static void nvme_config_discard(struct nvme_ns *ns)
+{
+ u32 logical_block_size = queue_logical_block_size(ns->queue);
+ ns->queue->limits.discard_zeroes_data = 0;
+ ns->queue->limits.discard_alignment = logical_block_size;
+ ns->queue->limits.discard_granularity = logical_block_size;
+ blk_queue_max_discard_sectors(ns->queue, 0xffffffff);
+ queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
+}
+
+int nvme_revalidate_disk(struct gendisk *disk)
+{
+ struct nvme_ns *ns = disk->private_data;
+ struct nvme_id_ns *id;
+ u8 lbaf, pi_type;
+ u16 old_ms;
+ unsigned short bs;
+
+ if (nvme_identify_ns(ns->ctrl, ns->ns_id, &id)) {
+ dev_warn(ns->ctrl->dev, "%s: Identify failure nvme%dn%d\n",
+ __func__, ns->ctrl->instance, ns->ns_id);
+ return -ENODEV;
+ }
+ if (id->ncap == 0) {
+ kfree(id);
+ return -ENODEV;
+ }
+
+ if (nvme_nvm_ns_supported(ns, id) && ns->type != NVME_NS_LIGHTNVM) {
+ if (nvme_nvm_register(ns->queue, disk->disk_name)) {
+ dev_warn(ns->ctrl->dev,
+ "%s: LightNVM init failure\n", __func__);
+ kfree(id);
+ return -ENODEV;
+ }
+ ns->type = NVME_NS_LIGHTNVM;
+ }
+
+ old_ms = ns->ms;
+ lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
+ ns->lba_shift = id->lbaf[lbaf].ds;
+ ns->ms = le16_to_cpu(id->lbaf[lbaf].ms);
+ ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT);
+
+ /*
+ * If identify namespace failed, use default 512 byte block size so
+ * block layer can use before failing read/write for 0 capacity.
+ */
+ if (ns->lba_shift == 0)
+ ns->lba_shift = 9;
+ bs = 1 << ns->lba_shift;
+
+ /* XXX: PI implementation requires metadata equal t10 pi tuple size */
+ pi_type = ns->ms == sizeof(struct t10_pi_tuple) ?
+ id->dps & NVME_NS_DPS_PI_MASK : 0;
+
+ blk_mq_freeze_queue(disk->queue);
+ if (blk_get_integrity(disk) && (ns->pi_type != pi_type ||
+ ns->ms != old_ms ||
+ bs != queue_logical_block_size(disk->queue) ||
+ (ns->ms && ns->ext)))
+ blk_integrity_unregister(disk);
+
+ ns->pi_type = pi_type;
+ blk_queue_logical_block_size(ns->queue, bs);
+
+ if (ns->ms && !ns->ext)
+ nvme_init_integrity(ns);
+
+ if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk))
+ set_capacity(disk, 0);
+ else
+ set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));
+
+ if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM)
+ nvme_config_discard(ns);
+ blk_mq_unfreeze_queue(disk->queue);
+
+ kfree(id);
+ return 0;
+}
+
+static char nvme_pr_type(enum pr_type type)
+{
+ switch (type) {
+ case PR_WRITE_EXCLUSIVE:
+ return 1;
+ case PR_EXCLUSIVE_ACCESS:
+ return 2;
+ case PR_WRITE_EXCLUSIVE_REG_ONLY:
+ return 3;
+ case PR_EXCLUSIVE_ACCESS_REG_ONLY:
+ return 4;
+ case PR_WRITE_EXCLUSIVE_ALL_REGS:
+ return 5;
+ case PR_EXCLUSIVE_ACCESS_ALL_REGS:
+ return 6;
+ default:
+ return 0;
+ }
+};
+
+static int nvme_pr_command(struct block_device *bdev, u32 cdw10,
+ u64 key, u64 sa_key, u8 op)
+{
+ struct nvme_ns *ns = bdev->bd_disk->private_data;
+ struct nvme_command c;
+ u8 data[16] = { 0, };
+
+ put_unaligned_le64(key, &data[0]);
+ put_unaligned_le64(sa_key, &data[8]);
+
+ memset(&c, 0, sizeof(c));
+ c.common.opcode = op;
+ c.common.nsid = cpu_to_le32(ns->ns_id);
+ c.common.cdw10[0] = cpu_to_le32(cdw10);
+
+ return nvme_submit_sync_cmd(ns->queue, &c, data, 16);
+}
+
+static int nvme_pr_register(struct block_device *bdev, u64 old,
+ u64 new, unsigned flags)
+{
+ u32 cdw10;
+
+ if (flags & ~PR_FL_IGNORE_KEY)
+ return -EOPNOTSUPP;
+
+ cdw10 = old ? 2 : 0;
+ cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0;
+ cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */
+ return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register);
+}
+
+static int nvme_pr_reserve(struct block_device *bdev, u64 key,
+ enum pr_type type, unsigned flags)
+{
+ u32 cdw10;
+
+ if (flags & ~PR_FL_IGNORE_KEY)
+ return -EOPNOTSUPP;
+
+ cdw10 = nvme_pr_type(type) << 8;
+ cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0);
+ return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire);
+}
+
+static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new,
+ enum pr_type type, bool abort)
+{
+ u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1;
+ return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire);
+}
+
+static int nvme_pr_clear(struct block_device *bdev, u64 key)
+{
+ u32 cdw10 = 1 | key ? 1 << 3 : 0;
+ return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register);
+}
+
+static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
+{
+ u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0;
+ return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release);
+}
+
+static const struct pr_ops nvme_pr_ops = {
+ .pr_register = nvme_pr_register,
+ .pr_reserve = nvme_pr_reserve,
+ .pr_release = nvme_pr_release,
+ .pr_preempt = nvme_pr_preempt,
+ .pr_clear = nvme_pr_clear,
+};
+
+const struct block_device_operations nvme_fops = {
+ .owner = THIS_MODULE,
+ .ioctl = nvme_ioctl,
+ .compat_ioctl = nvme_compat_ioctl,
+ .open = nvme_open,
+ .release = nvme_release,
+ .getgeo = nvme_getgeo,
+ .revalidate_disk= nvme_revalidate_disk,
+ .pr_ops = &nvme_pr_ops,
+};
+
+static void nvme_free_ctrl(struct kref *kref)
+{
+ struct nvme_ctrl *ctrl = container_of(kref, struct nvme_ctrl, kref);
+
+ ctrl->ops->free_ctrl(ctrl);
+}
+
+void nvme_put_ctrl(struct nvme_ctrl *ctrl)
+{
+ kref_put(&ctrl->kref, nvme_free_ctrl);
+}
+
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 5ba9acb..3b3f855 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -19,6 +19,8 @@
#include <linux/kref.h>
#include <linux/blk-mq.h>
+struct nvme_passthru_cmd;
+
extern unsigned char nvme_io_timeout;
#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
@@ -34,6 +36,7 @@ struct nvme_ctrl {
const struct nvme_ctrl_ops *ops;
struct request_queue *admin_q;
struct device *dev;
+ struct kref kref;
int instance;
char name[12];
@@ -69,6 +72,7 @@ struct nvme_ns {
struct nvme_ctrl_ops {
int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
+ void (*free_ctrl)(struct nvme_ctrl *ctrl);
};
static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl)
@@ -148,6 +152,9 @@ static inline int nvme_error_status(u16 status)
}
}
+void nvme_put_ctrl(struct nvme_ctrl *ctrl);
+void nvme_put_ns(struct nvme_ns *ns);
+
struct request *nvme_alloc_request(struct request_queue *q,
struct nvme_command *cmd, unsigned int flags);
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
@@ -170,6 +177,13 @@ int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid,
int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11,
dma_addr_t dma_addr, u32 *result);
+extern const struct block_device_operations nvme_fops;
+extern spinlock_t dev_list_lock;
+
+int nvme_revalidate_disk(struct gendisk *disk);
+int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+ struct nvme_passthru_cmd __user *ucmd);
+
struct sg_io_hdr;
int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index aa033f0..e0f40af 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -79,7 +79,6 @@ static bool use_cmb_sqes = true;
module_param(use_cmb_sqes, bool, 0644);
MODULE_PARM_DESC(use_cmb_sqes, "use controller's memory buffer for I/O SQes");
-static DEFINE_SPINLOCK(dev_list_lock);
static LIST_HEAD(dev_list);
static struct task_struct *nvme_thread;
static struct workqueue_struct *nvme_workq;
@@ -127,7 +126,6 @@ struct nvme_dev {
struct msix_entry *entry;
void __iomem *bar;
struct list_head namespaces;
- struct kref kref;
struct device *device;
struct work_struct reset_work;
struct work_struct probe_work;
@@ -601,27 +599,6 @@ static void nvme_dif_remap(struct request *req,
}
kunmap_atomic(pmap);
}
-
-static void nvme_init_integrity(struct nvme_ns *ns)
-{
- struct blk_integrity integrity;
-
- switch (ns->pi_type) {
- case NVME_NS_DPS_PI_TYPE3:
- integrity.profile = &t10_pi_type3_crc;
- break;
- case NVME_NS_DPS_PI_TYPE1:
- case NVME_NS_DPS_PI_TYPE2:
- integrity.profile = &t10_pi_type1_crc;
- break;
- default:
- integrity.profile = NULL;
- break;
- }
- integrity.tuple_size = ns->ms;
- blk_integrity_register(ns->disk, &integrity);
- blk_queue_max_integrity_segments(ns->queue, 1);
-}
#else /* CONFIG_BLK_DEV_INTEGRITY */
static void nvme_dif_remap(struct request *req,
void (*dif_swap)(u32 p, u32 v, struct t10_pi_tuple *pi))
@@ -633,9 +610,6 @@ static void nvme_dif_prep(u32 p, u32 v, struct t10_pi_tuple *pi)
static void nvme_dif_complete(u32 p, u32 v, struct t10_pi_tuple *pi)
{
}
-static void nvme_init_integrity(struct nvme_ns *ns)
-{
-}
#endif
static void req_completion(struct nvme_queue *nvmeq, void *ctx,
@@ -1633,94 +1607,6 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
return result;
}
-static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
-{
- struct nvme_user_io io;
- struct nvme_command c;
- unsigned length, meta_len;
- void __user *metadata;
-
- if (copy_from_user(&io, uio, sizeof(io)))
- return -EFAULT;
-
- switch (io.opcode) {
- case nvme_cmd_write:
- case nvme_cmd_read:
- case nvme_cmd_compare:
- break;
- default:
- return -EINVAL;
- }
-
- length = (io.nblocks + 1) << ns->lba_shift;
- meta_len = (io.nblocks + 1) * ns->ms;
- metadata = (void __user *)(uintptr_t)io.metadata;
-
- if (ns->ext) {
- length += meta_len;
- meta_len = 0;
- } else if (meta_len) {
- if ((io.metadata & 3) || !io.metadata)
- return -EINVAL;
- }
-
- memset(&c, 0, sizeof(c));
- c.rw.opcode = io.opcode;
- c.rw.flags = io.flags;
- c.rw.nsid = cpu_to_le32(ns->ns_id);
- c.rw.slba = cpu_to_le64(io.slba);
- c.rw.length = cpu_to_le16(io.nblocks);
- c.rw.control = cpu_to_le16(io.control);
- c.rw.dsmgmt = cpu_to_le32(io.dsmgmt);
- c.rw.reftag = cpu_to_le32(io.reftag);
- c.rw.apptag = cpu_to_le16(io.apptag);
- c.rw.appmask = cpu_to_le16(io.appmask);
-
- return __nvme_submit_user_cmd(ns->queue, &c,
- (void __user *)(uintptr_t)io.addr, length,
- metadata, meta_len, io.slba, NULL, 0);
-}
-
-static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
- struct nvme_passthru_cmd __user *ucmd)
-{
- struct nvme_passthru_cmd cmd;
- struct nvme_command c;
- unsigned timeout = 0;
- int status;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EACCES;
- if (copy_from_user(&cmd, ucmd, sizeof(cmd)))
- return -EFAULT;
-
- memset(&c, 0, sizeof(c));
- c.common.opcode = cmd.opcode;
- c.common.flags = cmd.flags;
- c.common.nsid = cpu_to_le32(cmd.nsid);
- c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
- c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
- c.common.cdw10[0] = cpu_to_le32(cmd.cdw10);
- c.common.cdw10[1] = cpu_to_le32(cmd.cdw11);
- c.common.cdw10[2] = cpu_to_le32(cmd.cdw12);
- c.common.cdw10[3] = cpu_to_le32(cmd.cdw13);
- c.common.cdw10[4] = cpu_to_le32(cmd.cdw14);
- c.common.cdw10[5] = cpu_to_le32(cmd.cdw15);
-
- if (cmd.timeout_ms)
- timeout = msecs_to_jiffies(cmd.timeout_ms);
-
- status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
- (void __user *)(uintptr_t)cmd.addr, cmd.data_len,
- &cmd.result, timeout);
- if (status >= 0) {
- if (put_user(cmd.result, &ucmd->result))
- return -EFAULT;
- }
-
- return status;
-}
-
static int nvme_subsys_reset(struct nvme_dev *dev)
{
if (!dev->subsystem)
@@ -1730,281 +1616,6 @@ static int nvme_subsys_reset(struct nvme_dev *dev)
return 0;
}
-static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
- unsigned long arg)
-{
- struct nvme_ns *ns = bdev->bd_disk->private_data;
-
- switch (cmd) {
- case NVME_IOCTL_ID:
- force_successful_syscall_return();
- return ns->ns_id;
- case NVME_IOCTL_ADMIN_CMD:
- return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg);
- case NVME_IOCTL_IO_CMD:
- return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg);
- case NVME_IOCTL_SUBMIT_IO:
- return nvme_submit_io(ns, (void __user *)arg);
- case SG_GET_VERSION_NUM:
- return nvme_sg_get_version_num((void __user *)arg);
- case SG_IO:
- return nvme_sg_io(ns, (void __user *)arg);
- default:
- return -ENOTTY;
- }
-}
-
-#ifdef CONFIG_COMPAT
-static int nvme_compat_ioctl(struct block_device *bdev, fmode_t mode,
- unsigned int cmd, unsigned long arg)
-{
- switch (cmd) {
- case SG_IO:
- return -ENOIOCTLCMD;
- }
- return nvme_ioctl(bdev, mode, cmd, arg);
-}
-#else
-#define nvme_compat_ioctl NULL
-#endif
-
-static void nvme_free_dev(struct kref *kref);
-static void nvme_free_ns(struct kref *kref)
-{
- struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref);
- struct nvme_dev *dev = to_nvme_dev(ns->ctrl);
-
- if (ns->type == NVME_NS_LIGHTNVM)
- nvme_nvm_unregister(ns->queue, ns->disk->disk_name);
-
- spin_lock(&dev_list_lock);
- ns->disk->private_data = NULL;
- spin_unlock(&dev_list_lock);
-
- kref_put(&dev->kref, nvme_free_dev);
- put_disk(ns->disk);
- kfree(ns);
-}
-
-static int nvme_open(struct block_device *bdev, fmode_t mode)
-{
- int ret = 0;
- struct nvme_ns *ns;
-
- spin_lock(&dev_list_lock);
- ns = bdev->bd_disk->private_data;
- if (!ns)
- ret = -ENXIO;
- else if (!kref_get_unless_zero(&ns->kref))
- ret = -ENXIO;
- spin_unlock(&dev_list_lock);
-
- return ret;
-}
-
-static void nvme_release(struct gendisk *disk, fmode_t mode)
-{
- struct nvme_ns *ns = disk->private_data;
- kref_put(&ns->kref, nvme_free_ns);
-}
-
-static int nvme_getgeo(struct block_device *bd, struct hd_geometry *geo)
-{
- /* some standard values */
- geo->heads = 1 << 6;
- geo->sectors = 1 << 5;
- geo->cylinders = get_capacity(bd->bd_disk) >> 11;
- return 0;
-}
-
-static void nvme_config_discard(struct nvme_ns *ns)
-{
- u32 logical_block_size = queue_logical_block_size(ns->queue);
- ns->queue->limits.discard_zeroes_data = 0;
- ns->queue->limits.discard_alignment = logical_block_size;
- ns->queue->limits.discard_granularity = logical_block_size;
- blk_queue_max_discard_sectors(ns->queue, 0xffffffff);
- queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
-}
-
-static int nvme_revalidate_disk(struct gendisk *disk)
-{
- struct nvme_ns *ns = disk->private_data;
- struct nvme_dev *dev = to_nvme_dev(ns->ctrl);
- struct nvme_id_ns *id;
- u8 lbaf, pi_type;
- u16 old_ms;
- unsigned short bs;
-
- if (nvme_identify_ns(&dev->ctrl, ns->ns_id, &id)) {
- dev_warn(dev->dev, "%s: Identify failure nvme%dn%d\n", __func__,
- dev->ctrl.instance, ns->ns_id);
- return -ENODEV;
- }
- if (id->ncap == 0) {
- kfree(id);
- return -ENODEV;
- }
-
- if (nvme_nvm_ns_supported(ns, id) && ns->type != NVME_NS_LIGHTNVM) {
- if (nvme_nvm_register(ns->queue, disk->disk_name)) {
- dev_warn(dev->dev,
- "%s: LightNVM init failure\n", __func__);
- kfree(id);
- return -ENODEV;
- }
- ns->type = NVME_NS_LIGHTNVM;
- }
-
- old_ms = ns->ms;
- lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
- ns->lba_shift = id->lbaf[lbaf].ds;
- ns->ms = le16_to_cpu(id->lbaf[lbaf].ms);
- ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT);
-
- /*
- * If identify namespace failed, use default 512 byte block size so
- * block layer can use before failing read/write for 0 capacity.
- */
- if (ns->lba_shift == 0)
- ns->lba_shift = 9;
- bs = 1 << ns->lba_shift;
-
- /* XXX: PI implementation requires metadata equal t10 pi tuple size */
- pi_type = ns->ms == sizeof(struct t10_pi_tuple) ?
- id->dps & NVME_NS_DPS_PI_MASK : 0;
-
- blk_mq_freeze_queue(disk->queue);
- if (blk_get_integrity(disk) && (ns->pi_type != pi_type ||
- ns->ms != old_ms ||
- bs != queue_logical_block_size(disk->queue) ||
- (ns->ms && ns->ext)))
- blk_integrity_unregister(disk);
-
- ns->pi_type = pi_type;
- blk_queue_logical_block_size(ns->queue, bs);
-
- if (ns->ms && !ns->ext)
- nvme_init_integrity(ns);
-
- if ((ns->ms && !(ns->ms == 8 && ns->pi_type) &&
- !blk_get_integrity(disk)) ||
- ns->type == NVME_NS_LIGHTNVM)
- set_capacity(disk, 0);
- else
- set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));
-
- if (dev->ctrl.oncs & NVME_CTRL_ONCS_DSM)
- nvme_config_discard(ns);
- blk_mq_unfreeze_queue(disk->queue);
-
- kfree(id);
- return 0;
-}
-
-static char nvme_pr_type(enum pr_type type)
-{
- switch (type) {
- case PR_WRITE_EXCLUSIVE:
- return 1;
- case PR_EXCLUSIVE_ACCESS:
- return 2;
- case PR_WRITE_EXCLUSIVE_REG_ONLY:
- return 3;
- case PR_EXCLUSIVE_ACCESS_REG_ONLY:
- return 4;
- case PR_WRITE_EXCLUSIVE_ALL_REGS:
- return 5;
- case PR_EXCLUSIVE_ACCESS_ALL_REGS:
- return 6;
- default:
- return 0;
- }
-};
-
-static int nvme_pr_command(struct block_device *bdev, u32 cdw10,
- u64 key, u64 sa_key, u8 op)
-{
- struct nvme_ns *ns = bdev->bd_disk->private_data;
- struct nvme_command c;
- u8 data[16] = { 0, };
-
- put_unaligned_le64(key, &data[0]);
- put_unaligned_le64(sa_key, &data[8]);
-
- memset(&c, 0, sizeof(c));
- c.common.opcode = op;
- c.common.nsid = cpu_to_le32(ns->ns_id);
- c.common.cdw10[0] = cpu_to_le32(cdw10);
-
- return nvme_submit_sync_cmd(ns->queue, &c, data, 16);
-}
-
-static int nvme_pr_register(struct block_device *bdev, u64 old,
- u64 new, unsigned flags)
-{
- u32 cdw10;
-
- if (flags & ~PR_FL_IGNORE_KEY)
- return -EOPNOTSUPP;
-
- cdw10 = old ? 2 : 0;
- cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0;
- cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */
- return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register);
-}
-
-static int nvme_pr_reserve(struct block_device *bdev, u64 key,
- enum pr_type type, unsigned flags)
-{
- u32 cdw10;
-
- if (flags & ~PR_FL_IGNORE_KEY)
- return -EOPNOTSUPP;
-
- cdw10 = nvme_pr_type(type) << 8;
- cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0);
- return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire);
-}
-
-static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new,
- enum pr_type type, bool abort)
-{
- u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1;
- return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire);
-}
-
-static int nvme_pr_clear(struct block_device *bdev, u64 key)
-{
- u32 cdw10 = 1 | (key ? 1 << 3 : 0);
- return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_register);
-}
-
-static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
-{
- u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0;
- return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release);
-}
-
-static const struct pr_ops nvme_pr_ops = {
- .pr_register = nvme_pr_register,
- .pr_reserve = nvme_pr_reserve,
- .pr_release = nvme_pr_release,
- .pr_preempt = nvme_pr_preempt,
- .pr_clear = nvme_pr_clear,
-};
-
-static const struct block_device_operations nvme_fops = {
- .owner = THIS_MODULE,
- .ioctl = nvme_ioctl,
- .compat_ioctl = nvme_compat_ioctl,
- .open = nvme_open,
- .release = nvme_release,
- .getgeo = nvme_getgeo,
- .revalidate_disk= nvme_revalidate_disk,
- .pr_ops = &nvme_pr_ops,
-};
-
static int nvme_kthread(void *data)
{
struct nvme_dev *dev, *next;
@@ -2105,7 +1716,7 @@ static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid)
if (nvme_revalidate_disk(ns->disk))
goto out_free_disk;
- kref_get(&dev->kref);
+ kref_get(&dev->ctrl.kref);
if (ns->type != NVME_NS_LIGHTNVM) {
add_disk(ns->disk);
if (ns->ms) {
@@ -2354,7 +1965,7 @@ static void nvme_ns_remove(struct nvme_ns *ns)
blk_cleanup_queue(ns->queue);
}
list_del_init(&ns->list);
- kref_put(&ns->kref, nvme_free_ns);
+ nvme_put_ns(ns);
}
static void nvme_scan_namespaces(struct nvme_dev *dev, unsigned nn)
@@ -2828,9 +2439,9 @@ static void nvme_release_instance(struct nvme_dev *dev)
spin_unlock(&dev_list_lock);
}
-static void nvme_free_dev(struct kref *kref)
+static void nvme_pci_free_ctrl(struct nvme_ctrl *ctrl)
{
- struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref);
+ struct nvme_dev *dev = to_nvme_dev(ctrl);
put_device(dev->dev);
put_device(dev->device);
@@ -2857,7 +2468,7 @@ static int nvme_dev_open(struct inode *inode, struct file *f)
ret = -EWOULDBLOCK;
break;
}
- if (!kref_get_unless_zero(&dev->kref))
+ if (!kref_get_unless_zero(&dev->ctrl.kref))
break;
f->private_data = dev;
ret = 0;
@@ -2872,7 +2483,7 @@ static int nvme_dev_open(struct inode *inode, struct file *f)
static int nvme_dev_release(struct inode *inode, struct file *f)
{
struct nvme_dev *dev = f->private_data;
- kref_put(&dev->kref, nvme_free_dev);
+ nvme_put_ctrl(&dev->ctrl);
return 0;
}
@@ -2987,19 +2598,19 @@ static int nvme_remove_dead_ctrl(void *arg)
if (pci_get_drvdata(pdev))
pci_stop_and_remove_bus_device_locked(pdev);
- kref_put(&dev->kref, nvme_free_dev);
+ nvme_put_ctrl(&dev->ctrl);
return 0;
}
static void nvme_dead_ctrl(struct nvme_dev *dev)
{
dev_warn(dev->dev, "Device failed to resume\n");
- kref_get(&dev->kref);
+ kref_get(&dev->ctrl.kref);
if (IS_ERR(kthread_run(nvme_remove_dead_ctrl, dev, "nvme%d",
dev->ctrl.instance))) {
dev_err(dev->dev,
"Failed to start controller remove task\n");
- kref_put(&dev->kref, nvme_free_dev);
+ nvme_put_ctrl(&dev->ctrl);
}
}
@@ -3077,6 +2688,7 @@ static int nvme_pci_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val)
static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = {
.reg_read32 = nvme_pci_reg_read32,
+ .free_ctrl = nvme_pci_free_ctrl,
};
static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
@@ -3116,7 +2728,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (result)
goto release;
- kref_init(&dev->kref);
+ kref_init(&dev->ctrl.kref);
dev->device = device_create(nvme_class, &pdev->dev,
MKDEV(nvme_char_major, dev->ctrl.instance),
dev, "nvme%d", dev->ctrl.instance);
@@ -3189,7 +2801,7 @@ static void nvme_remove(struct pci_dev *pdev)
nvme_free_queues(dev, 0);
nvme_release_cmb(dev);
nvme_release_prp_pools(dev);
- kref_put(&dev->kref, nvme_free_dev);
+ nvme_put_ctrl(&dev->ctrl);
}
/* These functions are yet to be implemented */
--
1.9.1
More information about the Linux-nvme
mailing list