int nr_chnls;
};
-struct nvm_area {
- struct list_head list;
- sector_t begin;
- sector_t end; /* end is excluded */
-};
-
static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name)
{
struct nvm_target *tgt;
nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
}
-void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries,
- int len)
-{
- struct nvm_geo *geo = &dev->geo;
- struct nvm_dev_map *dev_rmap = dev->rmap;
- u64 i;
-
- for (i = 0; i < len; i++) {
- struct nvm_ch_map *ch_rmap;
- int *lun_roffs;
- struct ppa_addr gaddr;
- u64 pba = le64_to_cpu(entries[i]);
- u64 diff;
-
- if (!pba)
- continue;
-
- gaddr = linear_to_generic_addr(geo, pba);
- ch_rmap = &dev_rmap->chnls[gaddr.g.ch];
- lun_roffs = ch_rmap->lun_offs;
-
- diff = ((ch_rmap->ch_off * geo->luns_per_chnl) +
- (lun_roffs[gaddr.g.lun])) * geo->sec_per_lun;
-
- entries[i] -= cpu_to_le64(diff);
- }
-}
-EXPORT_SYMBOL(nvm_part_to_tgt);
-
int nvm_register_tgt_type(struct nvm_tgt_type *tt)
{
int ret = 0;
}
EXPORT_SYMBOL(nvm_submit_io_sync);
-int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
- int nr_ppas)
-{
- struct nvm_geo *geo = &tgt_dev->geo;
- struct nvm_rq rqd;
- int ret;
-
- memset(&rqd, 0, sizeof(struct nvm_rq));
-
- rqd.opcode = NVM_OP_ERASE;
- rqd.flags = geo->plane_mode >> 1;
-
- ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
- if (ret)
- return ret;
-
- ret = nvm_submit_io_sync(tgt_dev, &rqd);
- if (ret) {
- pr_err("rrpr: erase I/O submission failed: %d\n", ret);
- goto free_ppa_list;
- }
-
-free_ppa_list:
- nvm_free_rqd_ppalist(tgt_dev, &rqd);
-
- return ret;
-}
-EXPORT_SYMBOL(nvm_erase_sync);
-
-int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb,
- nvm_l2p_update_fn *update_l2p, void *priv)
-{
- struct nvm_dev *dev = tgt_dev->parent;
-
- if (!dev->ops->get_l2p_tbl)
- return 0;
-
- return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv);
-}
-EXPORT_SYMBOL(nvm_get_l2p_tbl);
-
-int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len)
-{
- struct nvm_dev *dev = tgt_dev->parent;
- struct nvm_geo *geo = &dev->geo;
- struct nvm_area *area, *prev, *next;
- sector_t begin = 0;
- sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9;
-
- if (len > max_sectors)
- return -EINVAL;
-
- area = kmalloc(sizeof(struct nvm_area), GFP_KERNEL);
- if (!area)
- return -ENOMEM;
-
- prev = NULL;
-
- spin_lock(&dev->lock);
- list_for_each_entry(next, &dev->area_list, list) {
- if (begin + len > next->begin) {
- begin = next->end;
- prev = next;
- continue;
- }
- break;
- }
-
- if ((begin + len) > max_sectors) {
- spin_unlock(&dev->lock);
- kfree(area);
- return -EINVAL;
- }
-
- area->begin = *lba = begin;
- area->end = begin + len;
-
- if (prev) /* insert into sorted order */
- list_add(&area->list, &prev->list);
- else
- list_add(&area->list, &dev->area_list);
- spin_unlock(&dev->lock);
-
- return 0;
-}
-EXPORT_SYMBOL(nvm_get_area);
-
-void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin)
-{
- struct nvm_dev *dev = tgt_dev->parent;
- struct nvm_area *area;
-
- spin_lock(&dev->lock);
- list_for_each_entry(area, &dev->area_list, list) {
- if (area->begin != begin)
- continue;
-
- list_del(&area->list);
- spin_unlock(&dev->lock);
- kfree(area);
- return;
- }
- spin_unlock(&dev->lock);
-}
-EXPORT_SYMBOL(nvm_put_area);
-
void nvm_end_io(struct nvm_rq *rqd)
{
struct nvm_tgt_dev *tgt_dev = rqd->dev;
enum nvme_nvm_admin_opcode {
nvme_nvm_admin_identity = 0xe2,
- nvme_nvm_admin_get_l2p_tbl = 0xea,
nvme_nvm_admin_get_bb_tbl = 0xf2,
nvme_nvm_admin_set_bb_tbl = 0xf1,
};
-struct nvme_nvm_hb_rw {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __u64 rsvd2;
- __le64 metadata;
- __le64 prp1;
- __le64 prp2;
- __le64 spba;
- __le16 length;
- __le16 control;
- __le32 dsmgmt;
- __le64 slba;
-};
-
struct nvme_nvm_ph_rw {
__u8 opcode;
__u8 flags;
__u32 rsvd11[5];
};
-struct nvme_nvm_l2ptbl {
- __u8 opcode;
- __u8 flags;
- __u16 command_id;
- __le32 nsid;
- __le32 cdw2[4];
- __le64 prp1;
- __le64 prp2;
- __le64 slba;
- __le32 nlb;
- __le16 cdw14[6];
-};
-
struct nvme_nvm_getbbtbl {
__u8 opcode;
__u8 flags;
union {
struct nvme_common_command common;
struct nvme_nvm_identity identity;
- struct nvme_nvm_hb_rw hb_rw;
struct nvme_nvm_ph_rw ph_rw;
- struct nvme_nvm_l2ptbl l2p;
struct nvme_nvm_getbbtbl get_bb;
struct nvme_nvm_setbbtbl set_bb;
struct nvme_nvm_erase_blk erase;
static inline void _nvme_nvm_check_size(void)
{
BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64);
- BUILD_BUG_ON(sizeof(struct nvme_nvm_hb_rw) != 64);
BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64);
BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64);
BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64);
- BUILD_BUG_ON(sizeof(struct nvme_nvm_l2ptbl) != 64);
BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
BUILD_BUG_ON(sizeof(struct nvme_nvm_id_group) != 960);
BUILD_BUG_ON(sizeof(struct nvme_nvm_addr_format) != 16);
return ret;
}
-static int nvme_nvm_get_l2p_tbl(struct nvm_dev *nvmdev, u64 slba, u32 nlb,
- nvm_l2p_update_fn *update_l2p, void *priv)
-{
- struct nvme_ns *ns = nvmdev->q->queuedata;
- struct nvme_nvm_command c = {};
- u32 len = queue_max_hw_sectors(ns->ctrl->admin_q) << 9;
- u32 nlb_pr_rq = len / sizeof(u64);
- u64 cmd_slba = slba;
- void *entries;
- int ret = 0;
-
- c.l2p.opcode = nvme_nvm_admin_get_l2p_tbl;
- c.l2p.nsid = cpu_to_le32(ns->head->ns_id);
- entries = kmalloc(len, GFP_KERNEL);
- if (!entries)
- return -ENOMEM;
-
- while (nlb) {
- u32 cmd_nlb = min(nlb_pr_rq, nlb);
- u64 elba = slba + cmd_nlb;
-
- c.l2p.slba = cpu_to_le64(cmd_slba);
- c.l2p.nlb = cpu_to_le32(cmd_nlb);
-
- ret = nvme_submit_sync_cmd(ns->ctrl->admin_q,
- (struct nvme_command *)&c, entries, len);
- if (ret) {
- dev_err(ns->ctrl->device,
- "L2P table transfer failed (%d)\n", ret);
- ret = -EIO;
- goto out;
- }
-
- if (unlikely(elba > nvmdev->total_secs)) {
- pr_err("nvm: L2P data from device is out of bounds!\n");
- ret = -EINVAL;
- goto out;
- }
-
- /* Transform physical address to target address space */
- nvm_part_to_tgt(nvmdev, entries, cmd_nlb);
-
- if (update_l2p(cmd_slba, cmd_nlb, entries, priv)) {
- ret = -EINTR;
- goto out;
- }
-
- cmd_slba += cmd_nlb;
- nlb -= cmd_nlb;
- }
-
-out:
- kfree(entries);
- return ret;
-}
-
static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
u8 *blks)
{
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);
-
- if (rqd->opcode == NVM_OP_HBWRITE || rqd->opcode == NVM_OP_HBREAD)
- c->hb_rw.slba = cpu_to_le64(nvme_block_nr(ns,
- rqd->bio->bi_iter.bi_sector));
}
static void nvme_nvm_end_io(struct request *rq, blk_status_t status)
static struct nvm_dev_ops nvme_nvm_dev_ops = {
.identity = nvme_nvm_identity,
- .get_l2p_tbl = nvme_nvm_get_l2p_tbl,
-
.get_bb_tbl = nvme_nvm_get_bb_tbl,
.set_bb_tbl = nvme_nvm_set_bb_tbl,
struct nvm_dev;
struct nvm_tgt_dev;
-typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
-typedef int (nvm_get_l2p_tbl_fn)(struct nvm_dev *, u64, u32,
- nvm_l2p_update_fn *, void *);
typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, u8 *);
typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct ppa_addr *, int, int);
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
struct nvm_dev_ops {
nvm_id_fn *identity;
- nvm_get_l2p_tbl_fn *get_l2p_tbl;
nvm_op_bb_tbl_fn *get_bb_tbl;
nvm_op_set_bb_fn *set_bb_tbl;
NVM_RSP_WARN_HIGHECC = 0x4700,
/* Device opcodes */
- NVM_OP_HBREAD = 0x02,
- NVM_OP_HBWRITE = 0x81,
NVM_OP_PWRITE = 0x91,
NVM_OP_PREAD = 0x92,
NVM_OP_ERASE = 0x90,
struct list_head targets;
};
-static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo,
- u64 pba)
-{
- struct ppa_addr l;
- int secs, pgs, blks, luns;
- sector_t ppa = pba;
-
- l.ppa = 0;
-
- div_u64_rem(ppa, geo->sec_per_pg, &secs);
- l.g.sec = secs;
-
- sector_div(ppa, geo->sec_per_pg);
- div_u64_rem(ppa, geo->pgs_per_blk, &pgs);
- l.g.pg = pgs;
-
- sector_div(ppa, geo->pgs_per_blk);
- div_u64_rem(ppa, geo->blks_per_lun, &blks);
- l.g.blk = blks;
-
- sector_div(ppa, geo->blks_per_lun);
- div_u64_rem(ppa, geo->luns_per_chnl, &luns);
- l.g.lun = luns;
-
- sector_div(ppa, geo->luns_per_chnl);
- l.g.ch = ppa;
-
- return l;
-}
-
static inline struct ppa_addr generic_to_dev_addr(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr r)
{
extern int nvm_max_phys_sects(struct nvm_tgt_dev *);
extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *);
extern int nvm_submit_io_sync(struct nvm_tgt_dev *, struct nvm_rq *);
-extern int nvm_erase_sync(struct nvm_tgt_dev *, struct ppa_addr *, int);
-extern int nvm_get_l2p_tbl(struct nvm_tgt_dev *, u64, u32, nvm_l2p_update_fn *,
- void *);
-extern int nvm_get_area(struct nvm_tgt_dev *, sector_t *, sector_t);
-extern void nvm_put_area(struct nvm_tgt_dev *, sector_t);
extern void nvm_end_io(struct nvm_rq *);
extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int);
extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *);
-extern void nvm_part_to_tgt(struct nvm_dev *, sector_t *, int);
-
#else /* CONFIG_NVM */
struct nvm_dev_ops;
projects / linux.git / commitdiff