xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

NVMe: Add discard support for capable devices

Browse Source 
This adds discard support to block queues if the nvme device is capable of
deallocating blocks as indicated by the controller's optional command support.
A discard flagged bio request will submit an NVMe deallocate Data Set
Management command for the requested blocks.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Keith Busch
2012-11-09 16:33:05 -07:00
committed by Matthew Wilcox
parent a12183c627
commit 0e5e4f0e56
2 changed files with 91 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
include/linux/nvme.h
View File

@@ -107,6 +107,12 @@ struct nvme_id_ctrl {
__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;
@@ -246,6 +252,31 @@ enum {
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 {
@@ -372,6 +403,7 @@ struct nvme_command {
struct nvme_create_sq create_sq;
struct nvme_delete_queue delete_queue;
struct nvme_download_firmware dlfw;
struct nvme_dsm_cmd dsm;
};
};