diff options
| -rw-r--r-- | drivers/block/nvme-core.c | 11 | ||||
| -rw-r--r-- | include/linux/nvme.h | 2 | ||||
| -rw-r--r-- | include/uapi/linux/nvme.h | 1 |
3 files changed, 13 insertions, 1 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index e318a992e2e6..3a35c5807bb7 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -1901,6 +1901,15 @@ static int nvme_user_cmd(struct nvme_dev *dev, struct nvme_ns *ns, return status; } +static int nvme_subsys_reset(struct nvme_dev *dev) +{ + if (!dev->subsystem) + return -ENOTTY; + + writel(0x4E564D65, &dev->bar->nssr); /* "NVMe" */ + return 0; +} + static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { @@ -2932,6 +2941,8 @@ static long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) case NVME_IOCTL_RESET: dev_warn(dev->dev, "resetting controller\n"); return nvme_reset(dev); + case NVME_IOCTL_SUBSYS_RESET: + return nvme_subsys_reset(dev); default: return -ENOTTY; } diff --git a/include/linux/nvme.h b/include/linux/nvme.h index d6b5600cfa47..b5812c395351 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -28,7 +28,7 @@ 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 */ diff --git a/include/uapi/linux/nvme.h b/include/uapi/linux/nvme.h index 732b32e92b02..8864194a4151 100644 --- a/include/uapi/linux/nvme.h +++ b/include/uapi/linux/nvme.h @@ -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 */ |