Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932197AbbHGOaM (ORCPT ); Fri, 7 Aug 2015 10:30:12 -0400 Received: from mail-wi0-f177.google.com ([209.85.212.177]:37160 "EHLO mail-wi0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753481AbbHGOaE (ORCPT ); Fri, 7 Aug 2015 10:30:04 -0400 From: "=?UTF-8?q?Matias=20Bj=C3=B8rling?=" X-Google-Original-From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= To: hch@infradead.org, axboe@fb.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org Cc: jg@lightnvm.io, Stephen.Bates@pmcs.com, keith.busch@intel.com, =?UTF-8?q?Matias=20Bj=C3=B8rling?= Subject: [PATCH v7 5/5] nvme: LightNVM support Date: Fri, 7 Aug 2015 16:29:51 +0200 Message-Id: <1438957791-24632-6-git-send-email-mb@lightnvm.io> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1438957791-24632-1-git-send-email-mb@lightnvm.io> References: <1438957791-24632-1-git-send-email-mb@lightnvm.io> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 19699 Lines: 747 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 Signed-off-by: Matias Bjørling --- drivers/block/Makefile | 2 +- drivers/block/nvme-core.c | 23 +- drivers/block/nvme-lightnvm.c | 568 ++++++++++++++++++++++++++++++++++++++++++ include/linux/nvme.h | 6 + include/uapi/linux/nvme.h | 3 + 5 files changed, 598 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..e47bd4b 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #include @@ -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 +1999,17 @@ 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__); + kfree(id); + 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 +2041,7 @@ 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 +2159,8 @@ 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 +2359,9 @@ 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..8ad84c9 --- /dev/null +++ b/drivers/block/nvme-lightnvm.c @@ -0,0 +1,568 @@ +/* + * nvme-lightnvm.c - LightNVM NVMe device + * + * Copyright (C) 2014-2015 IT University of Copenhagen + * Initial release: Matias Bjorling + * + * 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 +#include +#include + +#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); + + if (rqd->npages == 1) + c->nvm_hb_rw.phys_addr = + cpu_to_le64(nvme_block_nr(ns, rqd->ppa)); + else + c->nvm_hb_rw.phys_addr = cpu_to_le64(rqd->dma_ppa_list); +} + +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(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, 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 void *nvme_nvm_create_ppa_pool(struct request_queue *q) +{ + struct nvme_ns *ns = q->queuedata; + struct nvme_dev *dev = ns->dev; + struct dma_pool *dma_pool; + + dma_pool = dma_pool_create("ppa list", dev->dev, PAGE_SIZE, PAGE_SIZE, + 0); + if (!dma_pool) { + dev_err(dev->dev, "Unable to create DMA pool\n"); + return NULL; + } + + return dma_pool; +} + +static void nvme_nvm_destroy_ppa_pool(void *pool) +{ + struct dma_pool *dma_pool = pool; + + dma_pool_destroy(dma_pool); +} + +static void *nvme_nvm_alloc_ppalist(struct request_queue *q, void *pool, + gfp_t mem_flags, dma_addr_t *dma_handler) +{ + struct nvme_ns *ns = q->queuedata; + struct nvme_dev *dev = ns->dev; + struct sector_t *ppa_list; + struct dma_pool *ppalist_pool = pool; + + ppa_list = dma_pool_alloc(ppalist_pool, mem_flags, dma_handler); + if (!ppa_list) { + dev_err(dev->dev, "Unable to allocate DMA\n"); + return NULL; + } + + return ppa_list; +} + +static void nvme_nvm_free_ppalist(void *pool, void *ppa_list, + dma_addr_t dma_handler) +{ + struct dma_pool *ppalist_pool = pool; + + dma_pool_free(ppalist_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, + + .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, + + .create_ppa_pool = nvme_nvm_create_ppa_pool, + .destroy_ppa_pool = nvme_nvm_destroy_ppa_pool, + .alloc_ppalist = nvme_nvm_alloc_ppalist, + .free_ppalist = nvme_nvm_free_ppalist, + + .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(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 #include #include +#include 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/