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- /*
- * 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,
- };
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