[PATCH v6 5/5] nvme: LightNVM support
Matias Bjørling
mb at lightnvm.io
Tue Jul 28 04:17:48 PDT 2015
The first generation of Open-Channel SSDs will be based on NVMe. The
integration requires that a NVMe device exposes itself as a LightNVM
device. The way this is done currently is by hooking into the
Controller Capabilities (CAP register) and a bit in NSFEAT for each
namespace.
After detection, vendor specific codes are used to identify the device
and enumerate supported features.
Signed-off-by: Javier González <jg at lightnvm.io>
Signed-off-by: Matias Bjørling <mb at lightnvm.io>
---
drivers/block/Makefile | 2 +-
drivers/block/nvme-core.c | 22 +-
drivers/block/nvme-lightnvm.c | 509 ++++++++++++++++++++++++++++++++++++++++++
include/linux/nvme.h | 6 +
include/uapi/linux/nvme.h | 3 +
5 files changed, 538 insertions(+), 4 deletions(-)
create mode 100644 drivers/block/nvme-lightnvm.c
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index 02b688d..a01d7d8 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -44,6 +44,6 @@ obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
obj-$(CONFIG_BLK_DEV_NULL_BLK) += null_blk.o
obj-$(CONFIG_ZRAM) += zram/
-nvme-y := nvme-core.o nvme-scsi.o
+nvme-y := nvme-core.o nvme-scsi.o nvme-lightnvm.o
skd-y := skd_main.o
swim_mod-y := swim.o swim_asm.o
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index 666e994..bab5746 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -40,6 +40,7 @@
#include <linux/slab.h>
#include <linux/t10-pi.h>
#include <linux/types.h>
+#include <linux/lightnvm.h>
#include <scsi/sg.h>
#include <asm-generic/io-64-nonatomic-lo-hi.h>
@@ -1751,7 +1752,8 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
dev->page_size = 1 << page_shift;
- dev->ctrl_config = NVME_CC_CSS_NVM;
+ dev->ctrl_config = NVME_CAP_LIGHTNVM(cap) ?
+ NVME_CC_CSS_LIGHTNVM : NVME_CC_CSS_NVM;
dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT;
dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE;
dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES;
@@ -1997,6 +1999,16 @@ static int nvme_revalidate_disk(struct gendisk *disk)
return -ENODEV;
}
+ if ((dev->ctrl_config & NVME_CC_CSS_LIGHTNVM) &&
+ id->nsfeat & NVME_NS_FEAT_NVM && ns->type != NVME_NS_NVM) {
+ if (nvme_nvm_register(ns->queue, disk->disk_name)) {
+ dev_warn(dev->dev,
+ "%s: LightNVM init failure\n", __func__);
+ return -ENODEV;
+ }
+ ns->type = NVME_NS_NVM;
+ }
+
old_ms = ns->ms;
lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
ns->lba_shift = id->lbaf[lbaf].ds;
@@ -2028,7 +2040,7 @@ static int nvme_revalidate_disk(struct gendisk *disk)
!ns->ext)
nvme_init_integrity(ns);
- if (ns->ms && !blk_get_integrity(disk))
+ if ((ns->ms && !blk_get_integrity(disk)) || ns->type == NVME_NS_NVM)
set_capacity(disk, 0);
else
set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));
@@ -2146,7 +2158,8 @@ static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid)
if (nvme_revalidate_disk(ns->disk))
goto out_free_disk;
- add_disk(ns->disk);
+ if (ns->type != NVME_NS_NVM)
+ add_disk(ns->disk);
if (ns->ms) {
struct block_device *bd = bdget_disk(ns->disk, 0);
if (!bd)
@@ -2345,6 +2358,9 @@ static void nvme_free_namespace(struct nvme_ns *ns)
{
list_del(&ns->list);
+ if (ns->type == NVME_NS_NVM)
+ nvme_nvm_unregister(ns->disk->disk_name);
+
spin_lock(&dev_list_lock);
ns->disk->private_data = NULL;
spin_unlock(&dev_list_lock);
diff --git a/drivers/block/nvme-lightnvm.c b/drivers/block/nvme-lightnvm.c
new file mode 100644
index 0000000..356fed4
--- /dev/null
+++ b/drivers/block/nvme-lightnvm.c
@@ -0,0 +1,509 @@
+/*
+ * nvme-lightnvm.c - LightNVM NVMe device
+ *
+ * Copyright (C) 2014-2015 IT University of Copenhagen
+ * Initial release: Matias Bjorling <mb at lightnvm.io>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
+ * USA.
+ *
+ */
+
+#include <linux/nvme.h>
+#include <linux/bitops.h>
+#include <linux/lightnvm.h>
+
+#ifdef CONFIG_NVM
+
+enum nvme_nvm_opcode {
+ nvme_nvm_cmd_hb_write = 0x81,
+ nvme_nvm_cmd_hb_read = 0x02,
+ nvme_nvm_cmd_phys_write = 0x91,
+ nvme_nvm_cmd_phys_read = 0x92,
+ nvme_nvm_cmd_erase = 0x90,
+};
+
+enum nvme_nvm_admin_opcode {
+ nvme_nvm_admin_identify = 0xe2,
+ nvme_nvm_admin_get_features = 0xe6,
+ nvme_nvm_admin_set_resp = 0xe5,
+ nvme_nvm_admin_get_l2p_tbl = 0xea,
+ nvme_nvm_admin_get_bb_tbl = 0xf2,
+ nvme_nvm_admin_set_bb_tbl = 0xf1,
+};
+
+struct nvme_nvm_hb_rw {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2;
+ __le64 metadata;
+ __le64 prp1;
+ __le64 prp2;
+ __le64 slba;
+ __le16 length;
+ __le16 control;
+ __le32 dsmgmt;
+ __le64 phys_addr;
+};
+
+struct nvme_nvm_identify {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd[2];
+ __le64 prp1;
+ __le64 prp2;
+ __le32 chnl_off;
+ __u32 rsvd11[5];
+};
+
+struct nvme_nvm_l2ptbl {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __le32 cdw2[4];
+ __le64 prp1;
+ __le64 prp2;
+ __le64 slba;
+ __le32 nlb;
+ __le16 cdw14[6];
+};
+
+struct nvme_nvm_bbtbl {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd[2];
+ __le64 prp1;
+ __le64 prp2;
+ __le32 prp1_len;
+ __le32 prp2_len;
+ __le32 lbb;
+ __u32 rsvd11[3];
+};
+
+struct nvme_nvm_set_resp {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd[2];
+ __le64 prp1;
+ __le64 prp2;
+ __le64 resp;
+ __u32 rsvd11[4];
+};
+
+struct nvme_nvm_erase_blk {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd[2];
+ __le64 prp1;
+ __le64 prp2;
+ __le64 blk_addr;
+ __u32 rsvd11[4];
+};
+
+struct nvme_nvm_command {
+ union {
+ struct nvme_common_command common;
+ struct nvme_nvm_identify nvm_identify;
+ struct nvme_nvm_hb_rw nvm_hb_rw;
+ struct nvme_nvm_l2ptbl nvm_l2p;
+ struct nvme_nvm_bbtbl nvm_get_bb;
+ struct nvme_nvm_bbtbl nvm_set_bb;
+ struct nvme_nvm_set_resp nvm_resp;
+ struct nvme_nvm_erase_blk nvm_erase;
+ };
+};
+
+/*
+ * Check we didin't inadvertently grow the command struct
+ */
+static inline void _nvme_nvm_check_size(void)
+{
+ BUILD_BUG_ON(sizeof(struct nvme_nvm_identify) != 64);
+ BUILD_BUG_ON(sizeof(struct nvme_nvm_hb_rw) != 64);
+ BUILD_BUG_ON(sizeof(struct nvme_nvm_l2ptbl) != 64);
+ BUILD_BUG_ON(sizeof(struct nvme_nvm_bbtbl) != 64);
+ BUILD_BUG_ON(sizeof(struct nvme_nvm_set_resp) != 64);
+ BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
+}
+
+struct nvme_nvm_id_chnl {
+ __le64 laddr_begin;
+ __le64 laddr_end;
+ __le32 oob_size;
+ __le32 queue_size;
+ __le32 gran_read;
+ __le32 gran_write;
+ __le32 gran_erase;
+ __le32 t_r;
+ __le32 t_sqr;
+ __le32 t_w;
+ __le32 t_sqw;
+ __le32 t_e;
+ __le16 chnl_parallelism;
+ __u8 io_sched;
+ __u8 reserved[133];
+} __packed;
+
+struct nvme_nvm_id {
+ __u8 ver_id;
+ __u8 nvm_type;
+ __le16 nchannels;
+ __u8 reserved[252];
+ struct nvme_nvm_id_chnl chnls[];
+} __packed;
+
+#define NVME_NVM_CHNLS_PR_REQ ((4096U - sizeof(struct nvme_nvm_id)) \
+ / sizeof(struct nvme_nvm_id_chnl))
+
+
+static int init_chnls(struct request_queue *q, struct nvm_id *nvm_id,
+ struct nvme_nvm_id *nvme_nvm_id)
+{
+ struct nvme_nvm_id_chnl *src = nvme_nvm_id->chnls;
+ struct nvm_id_chnl *dst = nvm_id->chnls;
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_nvm_command c = {
+ .nvm_identify.opcode = nvme_nvm_admin_identify,
+ .nvm_identify.nsid = cpu_to_le32(ns->ns_id),
+ };
+ unsigned int len = nvm_id->nchannels;
+ int i, end, ret, off = 0;
+
+ while (len) {
+ end = min_t(u32, NVME_NVM_CHNLS_PR_REQ, len);
+
+ for (i = 0; i < end; i++, dst++, src++) {
+ dst->laddr_begin = le64_to_cpu(src->laddr_begin);
+ dst->laddr_end = le64_to_cpu(src->laddr_end);
+ dst->oob_size = le32_to_cpu(src->oob_size);
+ dst->queue_size = le32_to_cpu(src->queue_size);
+ dst->gran_read = le32_to_cpu(src->gran_read);
+ dst->gran_write = le32_to_cpu(src->gran_write);
+ dst->gran_erase = le32_to_cpu(src->gran_erase);
+ dst->t_r = le32_to_cpu(src->t_r);
+ dst->t_sqr = le32_to_cpu(src->t_sqr);
+ dst->t_w = le32_to_cpu(src->t_w);
+ dst->t_sqw = le32_to_cpu(src->t_sqw);
+ dst->t_e = le32_to_cpu(src->t_e);
+ dst->io_sched = src->io_sched;
+ }
+
+ len -= end;
+ if (!len)
+ break;
+
+ off += end;
+
+ c.nvm_identify.chnl_off = off;
+
+ ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c,
+ nvme_nvm_id, 4096);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static int nvme_nvm_identify(struct request_queue *q, struct nvm_id *nvm_id)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_nvm_id *nvme_nvm_id;
+ struct nvme_nvm_command c = {
+ .nvm_identify.opcode = nvme_nvm_admin_identify,
+ .nvm_identify.nsid = cpu_to_le32(ns->ns_id),
+ .nvm_identify.chnl_off = 0,
+ };
+ int ret;
+
+ nvme_nvm_id = kmalloc(4096, GFP_KERNEL);
+ if (!nvme_nvm_id)
+ return -ENOMEM;
+
+ ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, nvme_nvm_id,
+ 4096);
+ if (ret) {
+ ret = -EIO;
+ goto out;
+ }
+
+ nvm_id->ver_id = nvme_nvm_id->ver_id;
+ nvm_id->nvm_type = nvme_nvm_id->nvm_type;
+ nvm_id->nchannels = le16_to_cpu(nvme_nvm_id->nchannels);
+
+ if (!nvm_id->chnls)
+ nvm_id->chnls = kmalloc(sizeof(struct nvm_id_chnl)
+ * nvm_id->nchannels, GFP_KERNEL);
+ if (!nvm_id->chnls) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = init_chnls(q, nvm_id, nvme_nvm_id);
+out:
+ kfree(nvme_nvm_id);
+ return ret;
+}
+
+static int nvme_nvm_get_features(struct request_queue *q,
+ struct nvm_get_features *gf)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_nvm_command c = {
+ .common.opcode = nvme_nvm_admin_get_features,
+ .common.nsid = ns->ns_id,
+ };
+ int sz = sizeof(struct nvm_get_features);
+ int ret;
+ u64 *resp;
+
+ resp = kmalloc(sz, GFP_KERNEL);
+ if (!resp)
+ return -ENOMEM;
+
+ ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, resp, sz);
+ if (ret)
+ goto done;
+
+ gf->rsp = le64_to_cpu(resp[0]);
+ gf->ext = le64_to_cpu(resp[1]);
+
+done:
+ kfree(resp);
+ return ret;
+}
+
+static int nvme_nvm_set_resp(struct request_queue *q, u64 resp)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_nvm_command c = {
+ .nvm_resp.opcode = nvme_nvm_admin_set_resp,
+ .nvm_resp.nsid = cpu_to_le32(ns->ns_id),
+ .nvm_resp.resp = cpu_to_le64(resp),
+ };
+
+ return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
+}
+
+static int nvme_nvm_get_l2p_tbl(struct request_queue *q, u64 slba, u64 nlb,
+ nvm_l2p_update_fn *update_l2p, void *priv)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_dev *dev = ns->dev;
+ struct nvme_nvm_command c = {
+ .nvm_l2p.opcode = nvme_nvm_admin_get_l2p_tbl,
+ .nvm_l2p.nsid = cpu_to_le32(ns->ns_id),
+ };
+ u32 len = queue_max_hw_sectors(q) << 9;
+ u64 nlb_pr_rq = len / sizeof(u64);
+ u64 cmd_slba = slba;
+ void *entries;
+ int ret = 0;
+
+ entries = kmalloc(len, GFP_KERNEL);
+ if (!entries)
+ return -ENOMEM;
+
+ while (nlb) {
+ u64 cmd_nlb = min_t(u64, nlb_pr_rq, nlb);
+
+ c.nvm_l2p.slba = cmd_slba;
+ c.nvm_l2p.nlb = cmd_nlb;
+
+ ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c,
+ entries, len);
+ if (ret) {
+ dev_err(dev->dev, "L2P table transfer failed (%d)\n",
+ ret);
+ ret = -EIO;
+ goto out;
+ }
+
+ if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) {
+ ret = -EINTR;
+ goto out;
+ }
+
+ cmd_slba += cmd_nlb;
+ nlb -= cmd_nlb;
+ }
+
+out:
+ kfree(entries);
+ return ret;
+}
+
+static int nvme_nvm_set_bb_tbl(struct request_queue *q, int lunid,
+ unsigned int nr_blocks, nvm_bb_update_fn *update_bbtbl, void *priv)
+{
+ return 0;
+}
+
+static int nvme_nvm_get_bb_tbl(struct request_queue *q, int lunid,
+ unsigned int nr_blocks, nvm_bb_update_fn *update_bbtbl, void *priv)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_dev *dev = ns->dev;
+ struct nvme_nvm_command c = {
+ .nvm_get_bb.opcode = nvme_nvm_admin_get_bb_tbl,
+ .nvm_get_bb.nsid = cpu_to_le32(ns->ns_id),
+ .nvm_get_bb.lbb = cpu_to_le32(lunid),
+ };
+ void *bb_bitmap;
+ u16 bb_bitmap_size;
+ int ret = 0;
+
+ bb_bitmap_size = ((nr_blocks >> 15) + 1) * PAGE_SIZE;
+ bb_bitmap = kmalloc(bb_bitmap_size, GFP_KERNEL);
+ if (!bb_bitmap)
+ return -ENOMEM;
+
+ bitmap_zero(bb_bitmap, nr_blocks);
+
+ ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, bb_bitmap,
+ bb_bitmap_size);
+ if (ret) {
+ dev_err(dev->dev, "get bad block table failed (%d)\n", ret);
+ ret = -EIO;
+ goto out;
+ }
+
+ ret = update_bbtbl(lunid, bb_bitmap, nr_blocks, priv);
+ if (ret) {
+ ret = -EINTR;
+ goto out;
+ }
+
+out:
+ kfree(bb_bitmap);
+ return ret;
+}
+
+static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd,
+ struct nvme_ns *ns, struct nvme_nvm_command *c)
+{
+ c->nvm_hb_rw.opcode = (rq_data_dir(rq) ?
+ nvme_nvm_cmd_hb_write : nvme_nvm_cmd_hb_read);
+ c->nvm_hb_rw.nsid = cpu_to_le32(ns->ns_id);
+ c->nvm_hb_rw.slba = cpu_to_le64(nvme_block_nr(ns,
+ rqd->bio->bi_iter.bi_sector));
+ c->nvm_hb_rw.length = cpu_to_le16(
+ (blk_rq_bytes(rq) >> ns->lba_shift) - 1);
+ c->nvm_hb_rw.phys_addr =
+ cpu_to_le64(nvme_block_nr(ns, rqd->phys_sector));
+}
+
+static void nvme_nvm_end_io(struct request *rq, int error)
+{
+ struct nvm_rq *rqd = rq->end_io_data;
+ struct nvm_tgt_instance *ins = rqd->ins;
+
+ ins->tt->end_io(rq->end_io_data, error);
+
+ kfree(rq->cmd);
+ blk_mq_free_request(rq);
+}
+
+static int nvme_nvm_submit_io(struct request_queue *q, struct nvm_rq *rqd)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct request *rq;
+ struct bio *bio = rqd->bio;
+ struct nvme_nvm_command *cmd;
+
+ rq = blk_mq_alloc_request(q, bio_rw(bio), GFP_KERNEL, 0);
+ if (IS_ERR(rq))
+ return -ENOMEM;
+
+ cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
+ if (!cmd) {
+ blk_mq_free_request(rq);
+ return -ENOMEM;
+ }
+
+ rq->cmd_type = REQ_TYPE_DRV_PRIV;
+ rq->ioprio = bio_prio(bio);
+
+ if (bio_has_data(bio))
+ rq->nr_phys_segments = bio_phys_segments(q, bio);
+
+ rq->__data_len = bio->bi_iter.bi_size;
+ rq->bio = rq->biotail = bio;
+
+ nvme_nvm_rqtocmd(rq, rqd, ns, cmd);
+
+ rq->cmd = (unsigned char *)cmd;
+ rq->cmd_len = sizeof(struct nvme_nvm_command);
+ rq->special = (void *)0;
+
+ rq->end_io_data = rqd;
+
+ blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
+
+ return 0;
+}
+
+static int nvme_nvm_erase_block(struct request_queue *q, sector_t block_id)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_nvm_command c = {
+ .nvm_erase.opcode = nvme_nvm_cmd_erase,
+ .nvm_erase.nsid = cpu_to_le32(ns->ns_id),
+ .nvm_erase.blk_addr = cpu_to_le64(block_id),
+ };
+
+ return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
+}
+
+static struct nvm_dev_ops nvme_nvm_dev_ops = {
+ .identify = nvme_nvm_identify,
+
+ .get_features = nvme_nvm_get_features,
+ .set_responsibility = nvme_nvm_set_resp,
+
+ .get_l2p_tbl = nvme_nvm_get_l2p_tbl,
+
+ .set_bb_tbl = nvme_nvm_set_bb_tbl,
+ .get_bb_tbl = nvme_nvm_get_bb_tbl,
+
+ .submit_io = nvme_nvm_submit_io,
+ .erase_block = nvme_nvm_erase_block,
+};
+
+int nvme_nvm_register(struct request_queue *q, char *disk_name)
+{
+ return nvm_register(q, disk_name, &nvme_nvm_dev_ops);
+}
+
+void nvme_nvm_unregister(char *disk_name)
+{
+ nvm_unregister(disk_name);
+}
+#else
+int nvme_nvm_register(struct request_queue *q, char *disk_name)
+{
+ return 0;
+}
+void nvme_nvm_unregister(char *disk_name) {};
+#endif /* CONFIG_NVM */
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index fa3fe16..bd587b1 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -19,6 +19,7 @@
#include <linux/pci.h>
#include <linux/kref.h>
#include <linux/blk-mq.h>
+#include <linux/lightnvm.h>
struct nvme_bar {
__u64 cap; /* Controller Capabilities */
@@ -41,6 +42,7 @@ struct nvme_bar {
#define NVME_CAP_STRIDE(cap) (((cap) >> 32) & 0xf)
#define NVME_CAP_MPSMIN(cap) (((cap) >> 48) & 0xf)
#define NVME_CAP_MPSMAX(cap) (((cap) >> 52) & 0xf)
+#define NVME_CAP_LIGHTNVM(cap) (((cap) >> 38) & 0x1)
#define NVME_CMB_BIR(cmbloc) ((cmbloc) & 0x7)
#define NVME_CMB_OFST(cmbloc) (((cmbloc) >> 12) & 0xfffff)
@@ -56,6 +58,7 @@ struct nvme_bar {
enum {
NVME_CC_ENABLE = 1 << 0,
NVME_CC_CSS_NVM = 0 << 4,
+ NVME_CC_CSS_LIGHTNVM = 1 << 4,
NVME_CC_MPS_SHIFT = 7,
NVME_CC_ARB_RR = 0 << 11,
NVME_CC_ARB_WRRU = 1 << 11,
@@ -138,6 +141,7 @@ struct nvme_ns {
u16 ms;
bool ext;
u8 pi_type;
+ int type;
u64 mode_select_num_blocks;
u32 mode_select_block_len;
};
@@ -184,4 +188,6 @@ int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
int nvme_sg_io32(struct nvme_ns *ns, unsigned long arg);
int nvme_sg_get_version_num(int __user *ip);
+int nvme_nvm_register(struct request_queue *q, char *disk_name);
+void nvme_nvm_unregister(char *disk_name);
#endif /* _LINUX_NVME_H */
diff --git a/include/uapi/linux/nvme.h b/include/uapi/linux/nvme.h
index 732b32e..0374f11 100644
--- a/include/uapi/linux/nvme.h
+++ b/include/uapi/linux/nvme.h
@@ -130,6 +130,7 @@ struct nvme_id_ns {
enum {
NVME_NS_FEAT_THIN = 1 << 0,
+ NVME_NS_FEAT_NVM = 1 << 3,
NVME_NS_FLBAS_LBA_MASK = 0xf,
NVME_NS_FLBAS_META_EXT = 0x10,
NVME_LBAF_RP_BEST = 0,
@@ -146,6 +147,8 @@ enum {
NVME_NS_DPS_PI_TYPE1 = 1,
NVME_NS_DPS_PI_TYPE2 = 2,
NVME_NS_DPS_PI_TYPE3 = 3,
+
+ NVME_NS_NVM = 1,
};
struct nvme_smart_log {
--
2.1.4
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