diff options
Diffstat (limited to 'drivers/nvme/host/lightnvm.c')
| -rw-r--r-- | drivers/nvme/host/lightnvm.c | 1294 |
1 files changed, 1294 insertions, 0 deletions
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c new file mode 100644 index 000000000..d10257b9c --- /dev/null +++ b/drivers/nvme/host/lightnvm.c @@ -0,0 +1,1294 @@ +/* + * nvme-lightnvm.c - LightNVM NVMe device + * + * Copyright (C) 2014-2015 IT University of Copenhagen + * Initial release: Matias Bjorling <mb@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 "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[0]; +}; + +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, + struct nvm_chk_meta *meta, + sector_t slba, int nchks) +{ + 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 = (struct nvme_nvm_chk_meta *)meta; + struct ppa_addr ppa; + size_t left = nchks * sizeof(struct nvme_nvm_chk_meta); + size_t log_pos, offset, len; + int ret, i, max_len; + + /* + * 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); + + /* 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); + + ret = nvme_get_log(ctrl, ns->head->ns_id, + NVME_NVM_LOG_REPORT_CHUNK, 0, 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->state; + meta->type = dev_meta->type; + meta->wi = dev_meta->wi; + meta->slba = le64_to_cpu(dev_meta->slba); + meta->cnlb = le64_to_cpu(dev_meta->cnlb); + meta->wp = le64_to_cpu(dev_meta->wp); + + meta++; + dev_meta++; + } + + offset += len; + left -= len; + } + + 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, NVME_QID_ANY); + if (IS_ERR(rq)) + return rq; + + rq->cmd_flags &= ~REQ_FAILFAST_DRIVER; + + if (rqd->bio) + blk_init_request_from_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) +{ + struct request_queue *q = dev->q; + struct nvme_nvm_command *cmd; + struct request *rq; + + 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)) { + kfree(cmd); + return PTR_ERR(rq); + } + + rq->end_io_data = rqd; + + blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io); + + return 0; +} + +static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd) +{ + struct request_queue *q = dev->q; + struct request *rq; + struct nvme_nvm_command cmd; + int ret = 0; + + memset(&cmd, 0, sizeof(struct nvme_nvm_command)); + + rq = nvme_nvm_alloc_request(q, rqd, &cmd); + if (IS_ERR(rq)) + return PTR_ERR(rq); + + /* I/Os can fail and the error is signaled through rqd. Callers must + * handle the error accordingly. + */ + blk_execute_rq(q, NULL, rq, 0); + if (nvme_req(rq)->flags & NVME_REQ_CANCELLED) + ret = -EINTR; + + rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64); + rqd->error = nvme_req(rq)->status; + + blk_mq_free_request(rq); + + return ret; +} + +static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name) +{ + struct nvme_ns *ns = nvmdev->q->queuedata; + + return dma_pool_create(name, ns->ctrl->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 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, + .submit_io_sync = nvme_nvm_submit_io_sync, + + .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 gendisk *disk = ns->disk; + 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, + NVME_QID_ANY); + if (IS_ERR(rq)) { + ret = -ENOMEM; + goto err_cmd; + } + + rq->timeout = timeout ? timeout : ADMIN_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->bi_disk = disk; + } + + blk_execute_rq(q, 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.cdw10[3] = cpu_to_le32(vcmd.cdw13); + c.common.cdw10[4] = cpu_to_le32(vcmd.cdw14); + c.common.cdw10[5] = 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, unsigned long arg) +{ + switch (cmd) { + case NVME_NVM_IOCTL_ADMIN_VIO: + return nvme_nvm_user_vcmd(ns, 1, (void __user *)arg); + case NVME_NVM_IOCTL_IO_VIO: + return nvme_nvm_user_vcmd(ns, 0, (void __user *)arg); + case NVME_NVM_IOCTL_SUBMIT_VIO: + return nvme_nvm_submit_vio(ns, (void __user *)arg); + default: + return -ENOTTY; + } +} + +void nvme_nvm_update_nvm_info(struct nvme_ns *ns) +{ + struct nvm_dev *ndev = ns->ndev; + struct nvm_geo *geo = &ndev->geo; + + if (geo->version == NVM_OCSSD_SPEC_12) + return; + + geo->csecs = 1 << ns->lba_shift; + geo->sos = ns->ms; +} + +int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node) +{ + struct request_queue *q = ns->queue; + struct nvm_dev *dev; + + _nvme_nvm_check_size(); + + dev = nvm_alloc_dev(node); + if (!dev) + return -ENOMEM; + + 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 = container_of(kobj, struct device, 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, +}; |