lightnvm: pblk: implement 2.0 support

Implement 2.0 support in pblk. This includes the address formatting and
mapping paths, as well as the sysfs entries for them.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 50 insertions, 6 deletions

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 27b4974930b4..91a5bc2556a3 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -229,20 +229,62 @@ static int pblk_set_addrf_12(struct nvm_geo *geo, struct nvm_addrf_12 *dst)
         return dst->blk_offset + src->blk_len;
 }
 
+static int pblk_set_addrf_20(struct nvm_geo *geo, struct nvm_addrf *adst,
+                             struct pblk_addrf *udst)
+{
+        struct nvm_addrf *src = &geo->addrf;
+
+        adst->ch_len = get_count_order(geo->num_ch);
+        adst->lun_len = get_count_order(geo->num_lun);
+        adst->chk_len = src->chk_len;
+        adst->sec_len = src->sec_len;
+
+        adst->sec_offset = 0;
+        adst->ch_offset = adst->sec_len;
+        adst->lun_offset = adst->ch_offset + adst->ch_len;
+        adst->chk_offset = adst->lun_offset + adst->lun_len;
+
+        adst->sec_mask = ((1ULL << adst->sec_len) - 1) << adst->sec_offset;
+        adst->chk_mask = ((1ULL << adst->chk_len) - 1) << adst->chk_offset;
+        adst->lun_mask = ((1ULL << adst->lun_len) - 1) << adst->lun_offset;
+        adst->ch_mask = ((1ULL << adst->ch_len) - 1) << adst->ch_offset;
+
+        udst->sec_stripe = geo->ws_opt;
+        udst->ch_stripe = geo->num_ch;
+        udst->lun_stripe = geo->num_lun;
+
+        udst->sec_lun_stripe = udst->sec_stripe * udst->ch_stripe;
+        udst->sec_ws_stripe = udst->sec_lun_stripe * udst->lun_stripe;
+
+        return adst->chk_offset + adst->chk_len;
+}
+
 static int pblk_set_addrf(struct pblk *pblk)
 {
         struct nvm_tgt_dev *dev = pblk->dev;
         struct nvm_geo *geo = &dev->geo;
         int mod;
 
-        div_u64_rem(geo->clba, pblk->min_write_pgs, &mod);
-        if (mod) {
-                pr_err("pblk: bad configuration of sectors/pages\n");
+        switch (geo->version) {
+        case NVM_OCSSD_SPEC_12:
+                div_u64_rem(geo->clba, pblk->min_write_pgs, &mod);
+                if (mod) {
+                        pr_err("pblk: bad configuration of sectors/pages\n");
+                        return -EINVAL;
+                }
+
+                pblk->addrf_len = pblk_set_addrf_12(geo, (void *)&pblk->addrf);
+                break;
+        case NVM_OCSSD_SPEC_20:
+                pblk->addrf_len = pblk_set_addrf_20(geo, (void *)&pblk->addrf,
+                                                                &pblk->uaddrf);
+                break;
+        default:
+                pr_err("pblk: OCSSD revision not supported (%d)\n",
+                                                                geo->version);
                 return -EINVAL;
         }
 
-        pblk->addrf_len = pblk_set_addrf_12(geo, (void *)&pblk->addrf);
-
         return 0;
 }
 
@@ -1110,7 +1152,9 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
         struct pblk *pblk;
         int ret;
 
-        if (geo->version != NVM_OCSSD_SPEC_12) {
+        /* pblk supports 1.2 and 2.0 versions */
+        if (!(geo->version == NVM_OCSSD_SPEC_12 ||
+                                        geo->version == NVM_OCSSD_SPEC_20)) {
                 pr_err("pblk: OCSSD version not supported (%u)\n",
                                                         geo->version);
                 return ERR_PTR(-EINVAL);