diff options
Diffstat (limited to 'drivers/nvme/host/lightnvm.c')
| -rw-r--r-- | drivers/nvme/host/lightnvm.c | 1274 |
1 files changed, 0 insertions, 1274 deletions
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c deleted file mode 100644 index e9d9ad47f70f..000000000000 --- a/drivers/nvme/host/lightnvm.c +++ /dev/null @@ -1,1274 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * nvme-lightnvm.c - LightNVM NVMe device - * - * Copyright (C) 2014-2015 IT University of Copenhagen - * Initial release: Matias Bjorling <mb@lightnvm.io> - */ - -#include "nvme.h" - -#include <linux/nvme.h> -#include <linux/bitops.h> -#include <linux/lightnvm.h> -#include <linux/vmalloc.h> -#include <linux/sched/sysctl.h> -#include <uapi/linux/lightnvm.h> - -enum nvme_nvm_admin_opcode { - nvme_nvm_admin_identity = 0xe2, - nvme_nvm_admin_get_bb_tbl = 0xf2, - nvme_nvm_admin_set_bb_tbl = 0xf1, -}; - -enum nvme_nvm_log_page { - NVME_NVM_LOG_REPORT_CHUNK = 0xca, -}; - -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_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_identity { - __u8 opcode; - __u8 flags; - __u16 command_id; - __le32 nsid; - __u64 rsvd[2]; - __le64 prp1; - __le64 prp2; - __u32 rsvd11[6]; -}; - -struct nvme_nvm_getbbtbl { - __u8 opcode; - __u8 flags; - __u16 command_id; - __le32 nsid; - __u64 rsvd[2]; - __le64 prp1; - __le64 prp2; - __le64 spba; - __u32 rsvd4[4]; -}; - -struct nvme_nvm_setbbtbl { - __u8 opcode; - __u8 flags; - __u16 command_id; - __le32 nsid; - __le64 rsvd[2]; - __le64 prp1; - __le64 prp2; - __le64 spba; - __le16 nlb; - __u8 value; - __u8 rsvd3; - __u32 rsvd4[3]; -}; - -struct nvme_nvm_command { - union { - struct nvme_common_command common; - struct nvme_nvm_ph_rw ph_rw; - struct nvme_nvm_erase_blk erase; - struct nvme_nvm_identity identity; - struct nvme_nvm_getbbtbl get_bb; - struct nvme_nvm_setbbtbl set_bb; - }; -}; - -struct nvme_nvm_id12_grp { - __u8 mtype; - __u8 fmtype; - __le16 res16; - __u8 num_ch; - __u8 num_lun; - __u8 num_pln; - __u8 rsvd1; - __le16 num_chk; - __le16 num_pg; - __le16 fpg_sz; - __le16 csecs; - __le16 sos; - __le16 rsvd2; - __le32 trdt; - __le32 trdm; - __le32 tprt; - __le32 tprm; - __le32 tbet; - __le32 tbem; - __le32 mpos; - __le32 mccap; - __le16 cpar; - __u8 reserved[906]; -} __packed; - -struct nvme_nvm_id12_addrf { - __u8 ch_offset; - __u8 ch_len; - __u8 lun_offset; - __u8 lun_len; - __u8 pln_offset; - __u8 pln_len; - __u8 blk_offset; - __u8 blk_len; - __u8 pg_offset; - __u8 pg_len; - __u8 sec_offset; - __u8 sec_len; - __u8 res[4]; -} __packed; - -struct nvme_nvm_id12 { - __u8 ver_id; - __u8 vmnt; - __u8 cgrps; - __u8 res; - __le32 cap; - __le32 dom; - struct nvme_nvm_id12_addrf ppaf; - __u8 resv[228]; - struct nvme_nvm_id12_grp grp; - __u8 resv2[2880]; -} __packed; - -struct nvme_nvm_bb_tbl { - __u8 tblid[4]; - __le16 verid; - __le16 revid; - __le32 rvsd1; - __le32 tblks; - __le32 tfact; - __le32 tgrown; - __le32 tdresv; - __le32 thresv; - __le32 rsvd2[8]; - __u8 blk[]; -}; - -struct nvme_nvm_id20_addrf { - __u8 grp_len; - __u8 pu_len; - __u8 chk_len; - __u8 lba_len; - __u8 resv[4]; -}; - -struct nvme_nvm_id20 { - __u8 mjr; - __u8 mnr; - __u8 resv[6]; - - struct nvme_nvm_id20_addrf lbaf; - - __le32 mccap; - __u8 resv2[12]; - - __u8 wit; - __u8 resv3[31]; - - /* Geometry */ - __le16 num_grp; - __le16 num_pu; - __le32 num_chk; - __le32 clba; - __u8 resv4[52]; - - /* Write data requirements */ - __le32 ws_min; - __le32 ws_opt; - __le32 mw_cunits; - __le32 maxoc; - __le32 maxocpu; - __u8 resv5[44]; - - /* Performance related metrics */ - __le32 trdt; - __le32 trdm; - __le32 twrt; - __le32 twrm; - __le32 tcrst; - __le32 tcrsm; - __u8 resv6[40]; - - /* Reserved area */ - __u8 resv7[2816]; - - /* Vendor specific */ - __u8 vs[1024]; -}; - -struct nvme_nvm_chk_meta { - __u8 state; - __u8 type; - __u8 wi; - __u8 rsvd[5]; - __le64 slba; - __le64 cnlb; - __le64 wp; -}; - -/* - * Check we didn't inadvertently grow the command struct - */ -static inline void _nvme_nvm_check_size(void) -{ - BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64); - BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64); - BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64); - BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64); - BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64); - BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_grp) != 960); - BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_addrf) != 16); - BUILD_BUG_ON(sizeof(struct nvme_nvm_id12) != NVME_IDENTIFY_DATA_SIZE); - BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 64); - BUILD_BUG_ON(sizeof(struct nvme_nvm_id20_addrf) != 8); - BUILD_BUG_ON(sizeof(struct nvme_nvm_id20) != NVME_IDENTIFY_DATA_SIZE); - BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) != 32); - BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) != - sizeof(struct nvm_chk_meta)); -} - -static void nvme_nvm_set_addr_12(struct nvm_addrf_12 *dst, - struct nvme_nvm_id12_addrf *src) -{ - dst->ch_len = src->ch_len; - dst->lun_len = src->lun_len; - dst->blk_len = src->blk_len; - dst->pg_len = src->pg_len; - dst->pln_len = src->pln_len; - dst->sec_len = src->sec_len; - - dst->ch_offset = src->ch_offset; - dst->lun_offset = src->lun_offset; - dst->blk_offset = src->blk_offset; - dst->pg_offset = src->pg_offset; - dst->pln_offset = src->pln_offset; - dst->sec_offset = src->sec_offset; - - dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset; - dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset; - dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset; - dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset; - dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset; - dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset; -} - -static int nvme_nvm_setup_12(struct nvme_nvm_id12 *id, - struct nvm_geo *geo) -{ - struct nvme_nvm_id12_grp *src; - int sec_per_pg, sec_per_pl, pg_per_blk; - - if (id->cgrps != 1) - return -EINVAL; - - src = &id->grp; - - if (src->mtype != 0) { - pr_err("nvm: memory type not supported\n"); - return -EINVAL; - } - - /* 1.2 spec. only reports a single version id - unfold */ - geo->major_ver_id = id->ver_id; - geo->minor_ver_id = 2; - - /* Set compacted version for upper layers */ - geo->version = NVM_OCSSD_SPEC_12; - - geo->num_ch = src->num_ch; - geo->num_lun = src->num_lun; - geo->all_luns = geo->num_ch * geo->num_lun; - - geo->num_chk = le16_to_cpu(src->num_chk); - - geo->csecs = le16_to_cpu(src->csecs); - geo->sos = le16_to_cpu(src->sos); - - pg_per_blk = le16_to_cpu(src->num_pg); - sec_per_pg = le16_to_cpu(src->fpg_sz) / geo->csecs; - sec_per_pl = sec_per_pg * src->num_pln; - geo->clba = sec_per_pl * pg_per_blk; - - geo->all_chunks = geo->all_luns * geo->num_chk; - geo->total_secs = geo->clba * geo->all_chunks; - - geo->ws_min = sec_per_pg; - geo->ws_opt = sec_per_pg; - geo->mw_cunits = geo->ws_opt << 3; /* default to MLC safe values */ - - /* Do not impose values for maximum number of open blocks as it is - * unspecified in 1.2. Users of 1.2 must be aware of this and eventually - * specify these values through a quirk if restrictions apply. - */ - geo->maxoc = geo->all_luns * geo->num_chk; - geo->maxocpu = geo->num_chk; - - geo->mccap = le32_to_cpu(src->mccap); - - geo->trdt = le32_to_cpu(src->trdt); - geo->trdm = le32_to_cpu(src->trdm); - geo->tprt = le32_to_cpu(src->tprt); - geo->tprm = le32_to_cpu(src->tprm); - geo->tbet = le32_to_cpu(src->tbet); - geo->tbem = le32_to_cpu(src->tbem); - - /* 1.2 compatibility */ - geo->vmnt = id->vmnt; - geo->cap = le32_to_cpu(id->cap); - geo->dom = le32_to_cpu(id->dom); - - geo->mtype = src->mtype; - geo->fmtype = src->fmtype; - - geo->cpar = le16_to_cpu(src->cpar); - geo->mpos = le32_to_cpu(src->mpos); - - geo->pln_mode = NVM_PLANE_SINGLE; - - if (geo->mpos & 0x020202) { - geo->pln_mode = NVM_PLANE_DOUBLE; - geo->ws_opt <<= 1; - } else if (geo->mpos & 0x040404) { - geo->pln_mode = NVM_PLANE_QUAD; - geo->ws_opt <<= 2; - } - - geo->num_pln = src->num_pln; - geo->num_pg = le16_to_cpu(src->num_pg); - geo->fpg_sz = le16_to_cpu(src->fpg_sz); - - nvme_nvm_set_addr_12((struct nvm_addrf_12 *)&geo->addrf, &id->ppaf); - - return 0; -} - -static void nvme_nvm_set_addr_20(struct nvm_addrf *dst, - struct nvme_nvm_id20_addrf *src) -{ - dst->ch_len = src->grp_len; - dst->lun_len = src->pu_len; - dst->chk_len = src->chk_len; - dst->sec_len = src->lba_len; - - dst->sec_offset = 0; - dst->chk_offset = dst->sec_len; - dst->lun_offset = dst->chk_offset + dst->chk_len; - dst->ch_offset = dst->lun_offset + dst->lun_len; - - dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset; - dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset; - dst->chk_mask = ((1ULL << dst->chk_len) - 1) << dst->chk_offset; - dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset; -} - -static int nvme_nvm_setup_20(struct nvme_nvm_id20 *id, - struct nvm_geo *geo) -{ - geo->major_ver_id = id->mjr; - geo->minor_ver_id = id->mnr; - - /* Set compacted version for upper layers */ - geo->version = NVM_OCSSD_SPEC_20; - - geo->num_ch = le16_to_cpu(id->num_grp); - geo->num_lun = le16_to_cpu(id->num_pu); - geo->all_luns = geo->num_ch * geo->num_lun; - - geo->num_chk = le32_to_cpu(id->num_chk); - geo->clba = le32_to_cpu(id->clba); - - geo->all_chunks = geo->all_luns * geo->num_chk; - geo->total_secs = geo->clba * geo->all_chunks; - - geo->ws_min = le32_to_cpu(id->ws_min); - geo->ws_opt = le32_to_cpu(id->ws_opt); - geo->mw_cunits = le32_to_cpu(id->mw_cunits); - geo->maxoc = le32_to_cpu(id->maxoc); - geo->maxocpu = le32_to_cpu(id->maxocpu); - - geo->trdt = le32_to_cpu(id->trdt); - geo->trdm = le32_to_cpu(id->trdm); - geo->tprt = le32_to_cpu(id->twrt); - geo->tprm = le32_to_cpu(id->twrm); - geo->tbet = le32_to_cpu(id->tcrst); - geo->tbem = le32_to_cpu(id->tcrsm); - - nvme_nvm_set_addr_20(&geo->addrf, &id->lbaf); - - return 0; -} - -static int nvme_nvm_identity(struct nvm_dev *nvmdev) -{ - struct nvme_ns *ns = nvmdev->q->queuedata; - struct nvme_nvm_id12 *id; - struct nvme_nvm_command c = {}; - int ret; - - c.identity.opcode = nvme_nvm_admin_identity; - c.identity.nsid = cpu_to_le32(ns->head->ns_id); - - id = kmalloc(sizeof(struct nvme_nvm_id12), GFP_KERNEL); - if (!id) - return -ENOMEM; - - ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c, - id, sizeof(struct nvme_nvm_id12)); - if (ret) { - ret = -EIO; - goto out; - } - - /* - * The 1.2 and 2.0 specifications share the first byte in their geometry - * command to make it possible to know what version a device implements. - */ - switch (id->ver_id) { - case 1: - ret = nvme_nvm_setup_12(id, &nvmdev->geo); - break; - case 2: - ret = nvme_nvm_setup_20((struct nvme_nvm_id20 *)id, - &nvmdev->geo); - break; - default: - dev_err(ns->ctrl->device, "OCSSD revision not supported (%d)\n", - id->ver_id); - ret = -EINVAL; - } - -out: - kfree(id); - return ret; -} - -static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa, - u8 *blks) -{ - struct request_queue *q = nvmdev->q; - struct nvm_geo *geo = &nvmdev->geo; - struct nvme_ns *ns = q->queuedata; - struct nvme_ctrl *ctrl = ns->ctrl; - struct nvme_nvm_command c = {}; - struct nvme_nvm_bb_tbl *bb_tbl; - int nr_blks = geo->num_chk * geo->num_pln; - int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks; - int ret = 0; - - c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl; - c.get_bb.nsid = cpu_to_le32(ns->head->ns_id); - c.get_bb.spba = cpu_to_le64(ppa.ppa); - - bb_tbl = kzalloc(tblsz, GFP_KERNEL); - if (!bb_tbl) - return -ENOMEM; - - ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c, - bb_tbl, tblsz); - if (ret) { - dev_err(ctrl->device, "get bad block table failed (%d)\n", ret); - ret = -EIO; - goto out; - } - - if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' || - bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') { - dev_err(ctrl->device, "bbt format mismatch\n"); - ret = -EINVAL; - goto out; - } - - if (le16_to_cpu(bb_tbl->verid) != 1) { - ret = -EINVAL; - dev_err(ctrl->device, "bbt version not supported\n"); - goto out; - } - - if (le32_to_cpu(bb_tbl->tblks) != nr_blks) { - ret = -EINVAL; - dev_err(ctrl->device, - "bbt unsuspected blocks returned (%u!=%u)", - le32_to_cpu(bb_tbl->tblks), nr_blks); - goto out; - } - - memcpy(blks, bb_tbl->blk, geo->num_chk * geo->num_pln); -out: - kfree(bb_tbl); - return ret; -} - -static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas, - int nr_ppas, int type) -{ - struct nvme_ns *ns = nvmdev->q->queuedata; - struct nvme_nvm_command c = {}; - int ret = 0; - - c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl; - c.set_bb.nsid = cpu_to_le32(ns->head->ns_id); - c.set_bb.spba = cpu_to_le64(ppas->ppa); - c.set_bb.nlb = cpu_to_le16(nr_ppas - 1); - c.set_bb.value = type; - - ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c, - NULL, 0); - if (ret) - dev_err(ns->ctrl->device, "set bad block table failed (%d)\n", - ret); - return ret; -} - -/* - * Expect the lba in device format - */ -static int nvme_nvm_get_chk_meta(struct nvm_dev *ndev, - sector_t slba, int nchks, - struct nvm_chk_meta *meta) -{ - struct nvm_geo *geo = &ndev->geo; - struct nvme_ns *ns = ndev->q->queuedata; - struct nvme_ctrl *ctrl = ns->ctrl; - struct nvme_nvm_chk_meta *dev_meta, *dev_meta_off; - struct ppa_addr ppa; - size_t left = nchks * sizeof(struct nvme_nvm_chk_meta); - size_t log_pos, offset, len; - int i, max_len; - int ret = 0; - - /* - * limit requests to maximum 256K to avoid issuing arbitrary large - * requests when the device does not specific a maximum transfer size. - */ - max_len = min_t(unsigned int, ctrl->max_hw_sectors << 9, 256 * 1024); - - dev_meta = kmalloc(max_len, GFP_KERNEL); - if (!dev_meta) - return -ENOMEM; - - /* Normalize lba address space to obtain log offset */ - ppa.ppa = slba; - ppa = dev_to_generic_addr(ndev, ppa); - - log_pos = ppa.m.chk; - log_pos += ppa.m.pu * geo->num_chk; - log_pos += ppa.m.grp * geo->num_lun * geo->num_chk; - - offset = log_pos * sizeof(struct nvme_nvm_chk_meta); - - while (left) { - len = min_t(unsigned int, left, max_len); - - memset(dev_meta, 0, max_len); - dev_meta_off = dev_meta; - - ret = nvme_get_log(ctrl, ns->head->ns_id, - NVME_NVM_LOG_REPORT_CHUNK, 0, NVME_CSI_NVM, - dev_meta, len, offset); - if (ret) { - dev_err(ctrl->device, "Get REPORT CHUNK log error\n"); - break; - } - - for (i = 0; i < len; i += sizeof(struct nvme_nvm_chk_meta)) { - meta->state = dev_meta_off->state; - meta->type = dev_meta_off->type; - meta->wi = dev_meta_off->wi; - meta->slba = le64_to_cpu(dev_meta_off->slba); - meta->cnlb = le64_to_cpu(dev_meta_off->cnlb); - meta->wp = le64_to_cpu(dev_meta_off->wp); - - meta++; - dev_meta_off++; - } - - offset += len; - left -= len; - } - - kfree(dev_meta); - - return ret; -} - -static inline void nvme_nvm_rqtocmd(struct nvm_rq *rqd, struct nvme_ns *ns, - struct nvme_nvm_command *c) -{ - c->ph_rw.opcode = rqd->opcode; - c->ph_rw.nsid = cpu_to_le32(ns->head->ns_id); - c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa); - c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list); - c->ph_rw.control = cpu_to_le16(rqd->flags); - c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1); -} - -static void nvme_nvm_end_io(struct request *rq, blk_status_t status) -{ - struct nvm_rq *rqd = rq->end_io_data; - - rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64); - rqd->error = nvme_req(rq)->status; - nvm_end_io(rqd); - - kfree(nvme_req(rq)->cmd); - blk_mq_free_request(rq); -} - -static struct request *nvme_nvm_alloc_request(struct request_queue *q, - struct nvm_rq *rqd, - struct nvme_nvm_command *cmd) -{ - struct nvme_ns *ns = q->queuedata; - struct request *rq; - - nvme_nvm_rqtocmd(rqd, ns, cmd); - - rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0); - if (IS_ERR(rq)) - return rq; - - rq->cmd_flags &= ~REQ_FAILFAST_DRIVER; - - if (rqd->bio) - blk_rq_append_bio(rq, rqd->bio); - else - rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM); - - return rq; -} - -static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd, - void *buf) -{ - struct nvm_geo *geo = &dev->geo; - struct request_queue *q = dev->q; - struct nvme_nvm_command *cmd; - struct request *rq; - int ret; - - cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL); - if (!cmd) - return -ENOMEM; - - rq = nvme_nvm_alloc_request(q, rqd, cmd); - if (IS_ERR(rq)) { - ret = PTR_ERR(rq); - goto err_free_cmd; - } - - if (buf) { - ret = blk_rq_map_kern(q, rq, buf, geo->csecs * rqd->nr_ppas, - GFP_KERNEL); - if (ret) - goto err_free_cmd; - } - - rq->end_io_data = rqd; - - blk_execute_rq_nowait(NULL, rq, 0, nvme_nvm_end_io); - - return 0; - -err_free_cmd: - kfree(cmd); - return ret; -} - -static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name, - int size) -{ - struct nvme_ns *ns = nvmdev->q->queuedata; - - return dma_pool_create(name, ns->ctrl->dev, 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 nvm_dev *dev, 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 *addr, - dma_addr_t dma_handler) -{ - dma_pool_free(pool, addr, dma_handler); -} - -static struct nvm_dev_ops nvme_nvm_dev_ops = { - .identity = nvme_nvm_identity, - - .get_bb_tbl = nvme_nvm_get_bb_tbl, - .set_bb_tbl = nvme_nvm_set_bb_tbl, - - .get_chk_meta = nvme_nvm_get_chk_meta, - - .submit_io = nvme_nvm_submit_io, - - .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, -}; - -static int nvme_nvm_submit_user_cmd(struct request_queue *q, - struct nvme_ns *ns, - struct nvme_nvm_command *vcmd, - void __user *ubuf, unsigned int bufflen, - void __user *meta_buf, unsigned int meta_len, - void __user *ppa_buf, unsigned int ppa_len, - u32 *result, u64 *status, unsigned int timeout) -{ - bool write = nvme_is_write((struct nvme_command *)vcmd); - struct nvm_dev *dev = ns->ndev; - struct request *rq; - struct bio *bio = NULL; - __le64 *ppa_list = NULL; - dma_addr_t ppa_dma; - __le64 *metadata = NULL; - dma_addr_t metadata_dma; - DECLARE_COMPLETION_ONSTACK(wait); - int ret = 0; - - rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0); - if (IS_ERR(rq)) { - ret = -ENOMEM; - goto err_cmd; - } - - if (timeout) - rq->timeout = timeout; - - if (ppa_buf && ppa_len) { - ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma); - if (!ppa_list) { - ret = -ENOMEM; - goto err_rq; - } - if (copy_from_user(ppa_list, (void __user *)ppa_buf, - sizeof(u64) * (ppa_len + 1))) { - ret = -EFAULT; - goto err_ppa; - } - vcmd->ph_rw.spba = cpu_to_le64(ppa_dma); - } else { - vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf); - } - - if (ubuf && bufflen) { - ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL); - if (ret) - goto err_ppa; - bio = rq->bio; - - if (meta_buf && meta_len) { - metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, - &metadata_dma); - if (!metadata) { - ret = -ENOMEM; - goto err_map; - } - - if (write) { - if (copy_from_user(metadata, - (void __user *)meta_buf, - meta_len)) { - ret = -EFAULT; - goto err_meta; - } - } - vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma); - } - - bio_set_dev(bio, ns->disk->part0); - } - - blk_execute_rq(NULL, rq, 0); - - if (nvme_req(rq)->flags & NVME_REQ_CANCELLED) - ret = -EINTR; - else if (nvme_req(rq)->status & 0x7ff) - ret = -EIO; - if (result) - *result = nvme_req(rq)->status & 0x7ff; - if (status) - *status = le64_to_cpu(nvme_req(rq)->result.u64); - - if (metadata && !ret && !write) { - if (copy_to_user(meta_buf, (void *)metadata, meta_len)) - ret = -EFAULT; - } -err_meta: - if (meta_buf && meta_len) - dma_pool_free(dev->dma_pool, metadata, metadata_dma); -err_map: - if (bio) - blk_rq_unmap_user(bio); -err_ppa: - if (ppa_buf && ppa_len) - dma_pool_free(dev->dma_pool, ppa_list, ppa_dma); -err_rq: - blk_mq_free_request(rq); -err_cmd: - return ret; -} - -static int nvme_nvm_submit_vio(struct nvme_ns *ns, - struct nvm_user_vio __user *uvio) -{ - struct nvm_user_vio vio; - struct nvme_nvm_command c; - unsigned int length; - int ret; - - if (copy_from_user(&vio, uvio, sizeof(vio))) - return -EFAULT; - if (vio.flags) - return -EINVAL; - - memset(&c, 0, sizeof(c)); - c.ph_rw.opcode = vio.opcode; - c.ph_rw.nsid = cpu_to_le32(ns->head->ns_id); - c.ph_rw.control = cpu_to_le16(vio.control); - c.ph_rw.length = cpu_to_le16(vio.nppas); - - length = (vio.nppas + 1) << ns->lba_shift; - - ret = nvme_nvm_submit_user_cmd(ns->queue, ns, &c, - (void __user *)(uintptr_t)vio.addr, length, - (void __user *)(uintptr_t)vio.metadata, - vio.metadata_len, - (void __user *)(uintptr_t)vio.ppa_list, vio.nppas, - &vio.result, &vio.status, 0); - - if (ret && copy_to_user(uvio, &vio, sizeof(vio))) - return -EFAULT; - - return ret; -} - -static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin, - struct nvm_passthru_vio __user *uvcmd) -{ - struct nvm_passthru_vio vcmd; - struct nvme_nvm_command c; - struct request_queue *q; - unsigned int timeout = 0; - int ret; - - if (copy_from_user(&vcmd, uvcmd, sizeof(vcmd))) - return -EFAULT; - if ((vcmd.opcode != 0xF2) && (!capable(CAP_SYS_ADMIN))) - return -EACCES; - if (vcmd.flags) - return -EINVAL; - - memset(&c, 0, sizeof(c)); - c.common.opcode = vcmd.opcode; - c.common.nsid = cpu_to_le32(ns->head->ns_id); - c.common.cdw2[0] = cpu_to_le32(vcmd.cdw2); - c.common.cdw2[1] = cpu_to_le32(vcmd.cdw3); - /* cdw11-12 */ - c.ph_rw.length = cpu_to_le16(vcmd.nppas); - c.ph_rw.control = cpu_to_le16(vcmd.control); - c.common.cdw13 = cpu_to_le32(vcmd.cdw13); - c.common.cdw14 = cpu_to_le32(vcmd.cdw14); - c.common.cdw15 = cpu_to_le32(vcmd.cdw15); - - if (vcmd.timeout_ms) - timeout = msecs_to_jiffies(vcmd.timeout_ms); - - q = admin ? ns->ctrl->admin_q : ns->queue; - - ret = nvme_nvm_submit_user_cmd(q, ns, - (struct nvme_nvm_command *)&c, - (void __user *)(uintptr_t)vcmd.addr, vcmd.data_len, - (void __user *)(uintptr_t)vcmd.metadata, - vcmd.metadata_len, - (void __user *)(uintptr_t)vcmd.ppa_list, vcmd.nppas, - &vcmd.result, &vcmd.status, timeout); - - if (ret && copy_to_user(uvcmd, &vcmd, sizeof(vcmd))) - return -EFAULT; - - return ret; -} - -int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, void __user *argp) -{ - switch (cmd) { - case NVME_NVM_IOCTL_ADMIN_VIO: - return nvme_nvm_user_vcmd(ns, 1, argp); - case NVME_NVM_IOCTL_IO_VIO: - return nvme_nvm_user_vcmd(ns, 0, argp); - case NVME_NVM_IOCTL_SUBMIT_VIO: - return nvme_nvm_submit_vio(ns, argp); - default: - return -ENOTTY; - } -} - -int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node) -{ - struct request_queue *q = ns->queue; - struct nvm_dev *dev; - struct nvm_geo *geo; - - _nvme_nvm_check_size(); - - dev = nvm_alloc_dev(node); - if (!dev) - return -ENOMEM; - - /* Note that csecs and sos will be overridden if it is a 1.2 drive. */ - geo = &dev->geo; - geo->csecs = 1 << ns->lba_shift; - geo->sos = ns->ms; - if (ns->features & NVME_NS_EXT_LBAS) - geo->ext = true; - else - geo->ext = false; - geo->mdts = ns->ctrl->max_hw_sectors; - - dev->q = q; - memcpy(dev->name, disk_name, DISK_NAME_LEN); - dev->ops = &nvme_nvm_dev_ops; - dev->private_data = ns; - ns->ndev = dev; - - return nvm_register(dev); -} - -void nvme_nvm_unregister(struct nvme_ns *ns) -{ - nvm_unregister(ns->ndev); -} - -static ssize_t nvm_dev_attr_show(struct device *dev, - struct device_attribute *dattr, char *page) -{ - struct nvme_ns *ns = nvme_get_ns_from_dev(dev); - struct nvm_dev *ndev = ns->ndev; - struct nvm_geo *geo = &ndev->geo; - struct attribute *attr; - - if (!ndev) - return 0; - - attr = &dattr->attr; - - if (strcmp(attr->name, "version") == 0) { - if (geo->major_ver_id == 1) - return scnprintf(page, PAGE_SIZE, "%u\n", - geo->major_ver_id); - else - return scnprintf(page, PAGE_SIZE, "%u.%u\n", - geo->major_ver_id, - geo->minor_ver_id); - } else if (strcmp(attr->name, "capabilities") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->cap); - } else if (strcmp(attr->name, "read_typ") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdt); - } else if (strcmp(attr->name, "read_max") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdm); - } else { - return scnprintf(page, - PAGE_SIZE, - "Unhandled attr(%s) in `%s`\n", - attr->name, __func__); - } -} - -static ssize_t nvm_dev_attr_show_ppaf(struct nvm_addrf_12 *ppaf, char *page) -{ - return scnprintf(page, PAGE_SIZE, - "0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n", - ppaf->ch_offset, ppaf->ch_len, - ppaf->lun_offset, ppaf->lun_len, - ppaf->pln_offset, ppaf->pln_len, - ppaf->blk_offset, ppaf->blk_len, - ppaf->pg_offset, ppaf->pg_len, - ppaf->sec_offset, ppaf->sec_len); -} - -static ssize_t nvm_dev_attr_show_12(struct device *dev, - struct device_attribute *dattr, char *page) -{ - struct nvme_ns *ns = nvme_get_ns_from_dev(dev); - struct nvm_dev *ndev = ns->ndev; - struct nvm_geo *geo = &ndev->geo; - struct attribute *attr; - - if (!ndev) - return 0; - - attr = &dattr->attr; - - if (strcmp(attr->name, "vendor_opcode") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->vmnt); - } else if (strcmp(attr->name, "device_mode") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->dom); - /* kept for compatibility */ - } else if (strcmp(attr->name, "media_manager") == 0) { - return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm"); - } else if (strcmp(attr->name, "ppa_format") == 0) { - return nvm_dev_attr_show_ppaf((void *)&geo->addrf, page); - } else if (strcmp(attr->name, "media_type") == 0) { /* u8 */ - return scnprintf(page, PAGE_SIZE, "%u\n", geo->mtype); - } else if (strcmp(attr->name, "flash_media_type") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->fmtype); - } else if (strcmp(attr->name, "num_channels") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch); - } else if (strcmp(attr->name, "num_luns") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun); - } else if (strcmp(attr->name, "num_planes") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pln); - } else if (strcmp(attr->name, "num_blocks") == 0) { /* u16 */ - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk); - } else if (strcmp(attr->name, "num_pages") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pg); - } else if (strcmp(attr->name, "page_size") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->fpg_sz); - } else if (strcmp(attr->name, "hw_sector_size") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->csecs); - } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */ - return scnprintf(page, PAGE_SIZE, "%u\n", geo->sos); - } else if (strcmp(attr->name, "prog_typ") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt); - } else if (strcmp(attr->name, "prog_max") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm); - } else if (strcmp(attr->name, "erase_typ") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet); - } else if (strcmp(attr->name, "erase_max") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem); - } else if (strcmp(attr->name, "multiplane_modes") == 0) { - return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mpos); - } else if (strcmp(attr->name, "media_capabilities") == 0) { - return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mccap); - } else if (strcmp(attr->name, "max_phys_secs") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", NVM_MAX_VLBA); - } else { - return scnprintf(page, PAGE_SIZE, - "Unhandled attr(%s) in `%s`\n", - attr->name, __func__); - } -} - -static ssize_t nvm_dev_attr_show_20(struct device *dev, - struct device_attribute *dattr, char *page) -{ - struct nvme_ns *ns = nvme_get_ns_from_dev(dev); - struct nvm_dev *ndev = ns->ndev; - struct nvm_geo *geo = &ndev->geo; - struct attribute *attr; - - if (!ndev) - return 0; - - attr = &dattr->attr; - - if (strcmp(attr->name, "groups") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch); - } else if (strcmp(attr->name, "punits") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun); - } else if (strcmp(attr->name, "chunks") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk); - } else if (strcmp(attr->name, "clba") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->clba); - } else if (strcmp(attr->name, "ws_min") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_min); - } else if (strcmp(attr->name, "ws_opt") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_opt); - } else if (strcmp(attr->name, "maxoc") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxoc); - } else if (strcmp(attr->name, "maxocpu") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxocpu); - } else if (strcmp(attr->name, "mw_cunits") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->mw_cunits); - } else if (strcmp(attr->name, "write_typ") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt); - } else if (strcmp(attr->name, "write_max") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm); - } else if (strcmp(attr->name, "reset_typ") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet); - } else if (strcmp(attr->name, "reset_max") == 0) { - return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem); - } else { - return scnprintf(page, PAGE_SIZE, - "Unhandled attr(%s) in `%s`\n", - attr->name, __func__); - } -} - -#define NVM_DEV_ATTR_RO(_name) \ - DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL) -#define NVM_DEV_ATTR_12_RO(_name) \ - DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_12, NULL) -#define NVM_DEV_ATTR_20_RO(_name) \ - DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_20, NULL) - -/* general attributes */ -static NVM_DEV_ATTR_RO(version); -static NVM_DEV_ATTR_RO(capabilities); - -static NVM_DEV_ATTR_RO(read_typ); -static NVM_DEV_ATTR_RO(read_max); - -/* 1.2 values */ -static NVM_DEV_ATTR_12_RO(vendor_opcode); -static NVM_DEV_ATTR_12_RO(device_mode); -static NVM_DEV_ATTR_12_RO(ppa_format); -static NVM_DEV_ATTR_12_RO(media_manager); -static NVM_DEV_ATTR_12_RO(media_type); -static NVM_DEV_ATTR_12_RO(flash_media_type); -static NVM_DEV_ATTR_12_RO(num_channels); -static NVM_DEV_ATTR_12_RO(num_luns); -static NVM_DEV_ATTR_12_RO(num_planes); -static NVM_DEV_ATTR_12_RO(num_blocks); -static NVM_DEV_ATTR_12_RO(num_pages); -static NVM_DEV_ATTR_12_RO(page_size); -static NVM_DEV_ATTR_12_RO(hw_sector_size); -static NVM_DEV_ATTR_12_RO(oob_sector_size); -static NVM_DEV_ATTR_12_RO(prog_typ); -static NVM_DEV_ATTR_12_RO(prog_max); -static NVM_DEV_ATTR_12_RO(erase_typ); -static NVM_DEV_ATTR_12_RO(erase_max); -static NVM_DEV_ATTR_12_RO(multiplane_modes); -static NVM_DEV_ATTR_12_RO(media_capabilities); -static NVM_DEV_ATTR_12_RO(max_phys_secs); - -/* 2.0 values */ -static NVM_DEV_ATTR_20_RO(groups); -static NVM_DEV_ATTR_20_RO(punits); -static NVM_DEV_ATTR_20_RO(chunks); -static NVM_DEV_ATTR_20_RO(clba); -static NVM_DEV_ATTR_20_RO(ws_min); -static NVM_DEV_ATTR_20_RO(ws_opt); -static NVM_DEV_ATTR_20_RO(maxoc); -static NVM_DEV_ATTR_20_RO(maxocpu); -static NVM_DEV_ATTR_20_RO(mw_cunits); -static NVM_DEV_ATTR_20_RO(write_typ); -static NVM_DEV_ATTR_20_RO(write_max); -static NVM_DEV_ATTR_20_RO(reset_typ); -static NVM_DEV_ATTR_20_RO(reset_max); - -static struct attribute *nvm_dev_attrs[] = { - /* version agnostic attrs */ - &dev_attr_version.attr, - &dev_attr_capabilities.attr, - &dev_attr_read_typ.attr, - &dev_attr_read_max.attr, - - /* 1.2 attrs */ - &dev_attr_vendor_opcode.attr, - &dev_attr_device_mode.attr, - &dev_attr_media_manager.attr, - &dev_attr_ppa_format.attr, - &dev_attr_media_type.attr, - &dev_attr_flash_media_type.attr, - &dev_attr_num_channels.attr, - &dev_attr_num_luns.attr, - &dev_attr_num_planes.attr, - &dev_attr_num_blocks.attr, - &dev_attr_num_pages.attr, - &dev_attr_page_size.attr, - &dev_attr_hw_sector_size.attr, - &dev_attr_oob_sector_size.attr, - &dev_attr_prog_typ.attr, - &dev_attr_prog_max.attr, - &dev_attr_erase_typ.attr, - &dev_attr_erase_max.attr, - &dev_attr_multiplane_modes.attr, - &dev_attr_media_capabilities.attr, - &dev_attr_max_phys_secs.attr, - - /* 2.0 attrs */ - &dev_attr_groups.attr, - &dev_attr_punits.attr, - &dev_attr_chunks.attr, - &dev_attr_clba.attr, - &dev_attr_ws_min.attr, - &dev_attr_ws_opt.attr, - &dev_attr_maxoc.attr, - &dev_attr_maxocpu.attr, - &dev_attr_mw_cunits.attr, - - &dev_attr_write_typ.attr, - &dev_attr_write_max.attr, - &dev_attr_reset_typ.attr, - &dev_attr_reset_max.attr, - - NULL, -}; - -static umode_t nvm_dev_attrs_visible(struct kobject *kobj, - struct attribute *attr, int index) -{ - struct device *dev = kobj_to_dev(kobj); - struct gendisk *disk = dev_to_disk(dev); - struct nvme_ns *ns = disk->private_data; - struct nvm_dev *ndev = ns->ndev; - struct device_attribute *dev_attr = - container_of(attr, typeof(*dev_attr), attr); - - if (!ndev) - return 0; - - if (dev_attr->show == nvm_dev_attr_show) - return attr->mode; - - switch (ndev->geo.major_ver_id) { - case 1: - if (dev_attr->show == nvm_dev_attr_show_12) - return attr->mode; - break; - case 2: - if (dev_attr->show == nvm_dev_attr_show_20) - return attr->mode; - break; - } - - return 0; -} - -const struct attribute_group nvme_nvm_attr_group = { - .name = "lightnvm", - .attrs = nvm_dev_attrs, - .is_visible = nvm_dev_attrs_visible, -}; |