NVMe: Define SMART log

This data structure is defined in the NVMe specification.  It's not used
by the kernel, but is available for use by userspace software.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>

diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c
index c1d5444f0cb3efd494346b14ed1f1a3783f650df..270805cf8d42e642ffb7164cadbbe7cc1d99e732 100644 (file)
--- a/drivers/block/nvme.c
+++ b/drivers/block/nvme.c
@@ -135,6 +135,7 @@ static inline void _nvme_check_size(void)
        BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096);
        BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096);
        BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64);
+       BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512);
 }
 
 typedef void (*nvme_completion_fn)(struct nvme_dev *, void *,

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index c25cccaa555a420b5cc6fd26d5e83a89937470a6..4fa3b0b9b071358a779c4448d874e3dffe57900d 100644 (file)
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -137,6 +137,34 @@ enum {
        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;