The first generation of Open-Channel SSDs is based on NVMe. The
integration requires that a NVMe device register itself as a LightNVM
device.
Detection is made through PCI IDs. Current supported devices are the
qemu nvme simulator and CNEX Labs Westlake SSD. The qemu nvme enables
support through vendor specific bits in the namespace identification and
the CNEX card is configured for LightNVM upon boot and does not need
detection other than PCI id.
After detection, vendor specific codes are used to identify the device
and enumerate supported features.
Signed-off-by: Javier González <jg@xxxxxxxxxxx>
Signed-off-by: Matias Bjørling <m@xxxxxxxxxxx>
---
drivers/nvme/host/Makefile | 2 +-
drivers/nvme/host/lightnvm.c | 597 +++++++++++++++++++++++++++++++++++++++++++
drivers/nvme/host/nvme.h | 10 +
drivers/nvme/host/pci.c | 39 ++-
4 files changed, 636 insertions(+), 12 deletions(-)
create mode 100644 drivers/nvme/host/lightnvm.c
diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile
index cfb6679..219dc206 100644
--- a/drivers/nvme/host/Makefile
+++ b/drivers/nvme/host/Makefile
@@ -1,4 +1,4 @@
obj-$(CONFIG_BLK_DEV_NVME) += nvme.o
-nvme-y += pci.o scsi.o
+nvme-y += pci.o scsi.o lightnvm.o
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
new file mode 100644
index 0000000..36925f4
--- /dev/null
+++ b/drivers/nvme/host/lightnvm.c
@@ -0,0 +1,597 @@
+/*
+ * nvme-lightnvm.c - LightNVM NVMe device
+ *
+ * Copyright (C) 2014-2015 IT University of Copenhagen
+ * Initial release: Matias Bjorling <mb@xxxxxxxxxxx>
+ *
+ * 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 "nvme.h"
+
+#ifdef CONFIG_NVM
+
+#include <linux/nvme.h>
+#include <linux/bitops.h>
+#include <linux/lightnvm.h>
+#include <linux/vmalloc.h>
+
+enum nvme_nvm_opcode {
+ nvme_nvm_cmd_hb_write = 0x81,
+ nvme_nvm_cmd_hb_read = 0x02,
+ nvme_nvm_cmd_ph_write = 0x91,
+ nvme_nvm_cmd_ph_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 spba;
+ __le16 length;
+ __le16 control;
+ __le32 dsmgmt;
+ __le64 slba;
+};
+
+struct nvme_nvm_ph_rw {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2;
+ __le64 metadata;
+ __le64 prp1;
+ __le64 prp2;
+ __le64 spba;
+ __le16 length;
+ __le16 control;
+ __le32 dsmgmt;
+ __le64 resv;
+};
+
+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 spba;
+ __le16 length;
+ __le16 control;
+ __le32 dsmgmt;
+ __le64 resv;
+};
+
+struct nvme_nvm_command {
+ union {
+ struct nvme_common_command common;
+ struct nvme_nvm_identify identify;
+ struct nvme_nvm_hb_rw hb_rw;
+ struct nvme_nvm_ph_rw ph_rw;
+ struct nvme_nvm_l2ptbl l2p;
+ struct nvme_nvm_bbtbl get_bb;
+ struct nvme_nvm_bbtbl set_bb;
+ struct nvme_nvm_set_resp resp;
+ struct nvme_nvm_erase_blk 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_ph_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_group {
+ __le64 laddr_begin;
+ __le32 queue_size;
+ __le32 channels;
+ __le32 luns_per_chnl;
+ __le32 sec_per_pg;
+ __le32 pgs_per_blk;
+ __le32 blks;
+ __le32 planes;
+ __le32 sec_size;
+ __le32 oob_size;
+ __le32 t_r;
+ __le32 t_sqr;
+ __le32 t_w;
+ __le32 t_sqw;
+ __le32 t_e;
+ __le16 chnl_parallelism;
+ __u8 plane_mode;
+ __u8 addr_mode;
+ __u8 reserved[124];
+} __packed;
+
+struct nvme_nvm_id {
+ __le16 ver_id;
+ __le16 ngroups;
+ __le16 nvm_vendor;
+ __u8 reserved[250];
+ struct nvme_nvm_id_group groups[20];
+} __packed;
+
+
+
+static int init_chnls(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
+{
+ struct nvme_nvm_id_group *src;
+ struct nvm_id_group *dst;
+ int i, end;
+
+ end = min_t(u32, 20, nvm_id->ngroups);
+
+ for (i = 0; i < end; i++) {
+ src = &nvme_nvm_id->groups[i];
+ dst = &nvm_id->groups[i];
+
+ dst->laddr_begin = le64_to_cpu(src->laddr_begin);
+ dst->queue_size = le32_to_cpu(src->queue_size);
+ dst->channels = le32_to_cpu(src->channels);
+ dst->luns_per_chnl = le32_to_cpu(src->luns_per_chnl);
+ dst->sec_per_pg = le32_to_cpu(src->sec_per_pg);
+ dst->pgs_per_blk = le32_to_cpu(src->pgs_per_blk);
+ dst->blks = le32_to_cpu(src->blks);
+ dst->planes = le32_to_cpu(src->planes);
+ dst->sec_size = le32_to_cpu(src->sec_size);
+ dst->oob_size = le32_to_cpu(src->oob_size);
+ 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->plane_mode = src->plane_mode;
+ dst->addr_mode = src->addr_mode;
+ }
+
+ 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 = {};
+ int ret;
+
+ c.identify.opcode = nvme_nvm_admin_identify;
+ c.identify.nsid = cpu_to_le32(ns->ns_id);
+ c.identify.chnl_off = 0;
+ nvme_nvm_id = kmalloc(sizeof(struct nvme_nvm_id), GFP_KERNEL);
+ if (!nvme_nvm_id)
+ return -ENOMEM;
+
+ ret = nvme_submit_sync_cmd(q, (struct nvme_command *)&c, nvme_nvm_id,
+ sizeof(struct nvme_nvm_id));
+ if (ret) {
+ ret = -EIO;
+ goto out;
+ }
+
+ nvm_id->ver_id = le16_to_cpu(nvme_nvm_id->ver_id);
+ nvm_id->nvm_vendor = le16_to_cpu(nvme_nvm_id->nvm_vendor);
+ nvm_id->ngroups = le16_to_cpu(nvme_nvm_id->ngroups);
+
+ ret = init_chnls(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 = {};
+ int sz = sizeof(struct nvm_get_features);
+ int ret;
+ u64 *resp;
+
+ c.common.opcode = nvme_nvm_admin_get_features;
+ c.common.nsid = ns->ns_id;
+ 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 = {};
+
+ c.resp.opcode = nvme_nvm_admin_set_resp;
+ c.resp.nsid = cpu_to_le32(ns->ns_id);
+ c.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 = {};
+ u32 len = queue_max_hw_sectors(q) << 9;
+ u64 nlb_pr_rq = len / sizeof(u64);
+ u64 cmd_slba = slba;
+ void *entries;
+ int ret = 0;
+
+ c.l2p.opcode = nvme_nvm_admin_get_l2p_tbl;
+ c.l2p.nsid = cpu_to_le32(ns->ns_id);
+ entries = kmalloc(len, GFP_KERNEL);
+ if (!entries)
+ return -ENOMEM;
+
+ while (nlb) {
+ u64 cmd_nlb = min_t(u64, nlb_pr_rq, nlb);
+
+ c.l2p.slba = cmd_slba;
+ c.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_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 = {};
+ void *bb_bitmap;
+ u16 bb_bitmap_size;
+ int ret = 0;
+
+ c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
+ c.get_bb.nsid = cpu_to_le32(ns->ns_id);
+ c.get_bb.lbb = cpu_to_le32(lunid);
+ 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_cmd_hybrid(struct nvm_rq *rqd, struct nvme_ns *ns,
+ struct nvme_nvm_command *c)
+{
+ c->hb_rw.opcode = (rqd->opcode & 1) ?
+ nvme_nvm_cmd_hb_write : nvme_nvm_cmd_hb_read;
+ c->hb_rw.nsid = cpu_to_le32(ns->ns_id);
+ if (rqd->nr_pages == 1)
+ c->hb_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
+ else
+ c->hb_rw.spba = cpu_to_le64(rqd->dma_ppa_list);
+ c->hb_rw.length = cpu_to_le16(rqd->nr_pages - 1);
+ c->hb_rw.slba = cpu_to_le64(nvme_block_nr(ns,
+ rqd->bio->bi_iter.bi_sector));
+}
+
+static inline void nvme_nvm_cmd_phys(struct nvm_rq *rqd, struct nvme_ns *ns,
+ struct nvme_nvm_command *c)
+{
+ c->ph_rw.opcode = (rqd->opcode & 1) ?
+ nvme_nvm_cmd_ph_write : nvme_nvm_cmd_ph_read;
+ c->ph_rw.nsid = cpu_to_le32(ns->ns_id);
+ if (rqd->nr_pages == 1)
+ c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
+ else
+ c->ph_rw.spba = cpu_to_le64(rqd->dma_ppa_list);
+ c->ph_rw.length = cpu_to_le16(rqd->nr_pages - 1);
+ c->ph_rw.control = cpu_to_le16(0x2); /*quad access*/
+}
+
+static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd,
+ struct nvme_ns *ns, struct nvme_nvm_command *c)
+{
+ switch (rqd->opcode) {
+ case NVM_OP_HBWRITE:
+ case NVM_OP_HBREAD:
+ nvme_nvm_cmd_hybrid(rqd, ns, c);
+ break;
+ case NVM_OP_PWRITE:
+ case NVM_OP_PREAD:
+ nvme_nvm_cmd_phys(rqd, ns, c);
+ break;
+ default:
+ pr_err("nvme: invalid opcode\n");
+ }
+}
+
+static void nvme_nvm_end_io(struct request *rq, int error)
+{
+ struct nvm_rq *rqd = rq->end_io_data;
+ struct nvm_dev *dev = rqd->dev;
+
+ if (error)
+ pr_err("nvme: err status: %x result: %lx\n",
+ rq->errors, (unsigned long)rq->special);
+
+ dev->mt->end_io(rqd, 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, struct nvm_rq *rqd)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_nvm_command c = {};
+
+ c.erase.opcode = nvme_nvm_cmd_erase;
+ c.erase.nsid = cpu_to_le32(ns->ns_id);
+ if (rqd->nr_pages == 1)
+ c.erase.spba = cpu_to_le64(rqd->ppa_addr.ppa);
+ else
+ c.erase.spba = cpu_to_le64(rqd->dma_ppa_list);
+ c.erase.length = cpu_to_le16(rqd->nr_pages - 1);
+
+ return nvme_submit_sync_cmd(q, (struct nvme_command *)&c, NULL, 0);
+}
+
+static void *nvme_nvm_create_dma_pool(struct request_queue *q, char *name)
+{
+ struct nvme_ns *ns = q->queuedata;
+ struct nvme_dev *dev = ns->dev;
+
+ return dma_pool_create(name, dev->dev, PAGE_SIZE, PAGE_SIZE, 0);
+}
+
+static void nvme_nvm_destroy_dma_pool(void *pool)
+{
+ struct dma_pool *dma_pool = pool;
+
+ dma_pool_destroy(dma_pool);
+}
+
+static void *nvme_nvm_dev_dma_alloc(struct request_queue *q, void *pool,
+ gfp_t mem_flags, dma_addr_t *dma_handler)
+{
+ return dma_pool_alloc(pool, mem_flags, dma_handler);
+}
+
+static void nvme_nvm_dev_dma_free(void *pool, void *ppa_list,
+ dma_addr_t dma_handler)
+{
+ dma_pool_free(pool, ppa_list, dma_handler);
+}
+
+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,
+
+ .get_bb_tbl = nvme_nvm_get_bb_tbl,
+
+ .submit_io = nvme_nvm_submit_io,
+ .erase_block = nvme_nvm_erase_block,
+
+ .create_dma_pool = nvme_nvm_create_dma_pool,
+ .destroy_dma_pool = nvme_nvm_destroy_dma_pool,
+ .dev_dma_alloc = nvme_nvm_dev_dma_alloc,
+ .dev_dma_free = nvme_nvm_dev_dma_free,
+
+ .max_phys_sect = 64,
+};
+
+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(struct request_queue *q, char *disk_name)
+{
+ nvm_unregister(disk_name);
+}
+
+int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id)
+{
+ struct nvme_dev *dev = ns->dev;
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
+
+ /* QEMU NVMe simulator - LightNVM detection*/
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x5845 &&
+ id->vs[0] == 0x1)
+ return 1;
+
+ /* CNEX Labs */
+ if (pdev->vendor == 0x1d1d && pdev->device == 0x2807)
+ return 1;
+
+ return 0;
+}
+#else
+int nvme_nvm_register(struct request_queue *q, char *disk_name)
+{
+ return 0;
+}
+void nvme_nvm_unregister(char *disk_name) {};
+int nvme_nvm_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id)
+{
+ return 0;
+}
+#endif /* CONFIG_NVM */
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index c1f41bf..fdb4e5b 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -22,6 +22,11 @@
extern unsigned char nvme_io_timeout;
#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
+enum {
+ NVME_NS_LBA = 0,
+ NVME_NS_LIGHTNVM = 1,
+};
+
/*
* Represents an NVM Express device. Each nvme_dev is a PCI function.
*/
@@ -84,6 +89,7 @@ struct nvme_ns {
u16 ms;
bool ext;
u8 pi_type;
+ int type;
u64 mode_select_num_blocks;
u32 mode_select_block_len;
};
@@ -130,4 +136,8 @@ 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_ns_supported(struct nvme_ns *ns, struct nvme_id_ns *id);
+int nvme_nvm_register(struct request_queue *q, char *disk_name);
+void nvme_nvm_unregister(struct request_queue *q, char *disk_name);
+
#endif /* _NVME_H */
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index ad58ee3..cc22633 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1946,6 +1946,9 @@ 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);
@@ -2015,6 +2018,16 @@ static int nvme_revalidate_disk(struct gendisk *disk)
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;
@@ -2046,7 +2059,9 @@ static int nvme_revalidate_disk(struct gendisk *disk)
!ns->ext)
nvme_init_integrity(ns);
- if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk))
+ 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));
@@ -2169,17 +2184,19 @@ static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid)
goto out_free_disk;
kref_get(&dev->kref);
- add_disk(ns->disk);
- if (ns->ms) {
- struct block_device *bd = bdget_disk(ns->disk, 0);
- if (!bd)
- return;
- if (blkdev_get(bd, FMODE_READ, NULL)) {
- bdput(bd);
- return;
+ if (ns->type != NVME_NS_LIGHTNVM) {
+ add_disk(ns->disk);
+ if (ns->ms) {
+ struct block_device *bd = bdget_disk(ns->disk, 0);
+ if (!bd)
+ return;
+ if (blkdev_get(bd, FMODE_READ, NULL)) {
+ bdput(bd);
+ return;
+ }
+ blkdev_reread_part(bd);
+ blkdev_put(bd, FMODE_READ);
}
- blkdev_reread_part(bd);
- blkdev_put(bd, FMODE_READ);
}
return;
out_free_disk:
--
2.1.4
--
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