+ /* sense first page */
+ ret = nvm_bb_chunk_sense(dev, ppa);
+ if (ret < 0) /* io error */
+ return ret;
+ else if (ret == 0) /* valid data */
+ meta->state = NVM_CHK_ST_OPEN;
+ else if (ret > 0) {
+ /*
+ * If empty page, the chunk is free, else it is an
+ * actual io error. In that case, mark it offline.
+ */
+ switch (ret) {
+ case NVM_RSP_ERR_EMPTYPAGE:
+ meta->state = NVM_CHK_ST_FREE;
+ return 0;
+ case NVM_RSP_ERR_FAILCRC:
+ case NVM_RSP_ERR_FAILECC:
+ case NVM_RSP_WARN_HIGHECC:
+ meta->state = NVM_CHK_ST_OPEN;
+ goto scan;
+ default:
+ return -ret; /* other io error */
+ }
+ }
+
+ /* sense last page */
+ ppa.g.pg = geo->num_pg - 1;
+ ppa.g.pl = geo->num_pln - 1;
+
+ ret = nvm_bb_chunk_sense(dev, ppa);
+ if (ret < 0) /* io error */
+ return ret;
+ else if (ret == 0) { /* Chunk fully written */
+ meta->state = NVM_CHK_ST_CLOSED;
+ meta->wp = geo->clba;
+ return 0;
+ } else if (ret > 0) {
+ switch (ret) {
+ case NVM_RSP_ERR_EMPTYPAGE:
+ case NVM_RSP_ERR_FAILCRC:
+ case NVM_RSP_ERR_FAILECC:
+ case NVM_RSP_WARN_HIGHECC:
+ meta->state = NVM_CHK_ST_OPEN;
+ break;
+ default:
+ return -ret; /* other io error */
+ }
+ }
+
+scan:
+ /*
+ * chunk is open, we scan sequentially to update the write pointer.
+ * We make the assumption that targets write data across all planes
+ * before moving to the next page.
+ */
+ for (pg = 0; pg < geo->num_pg; pg++) {
+ for (pl = 0; pl < geo->num_pln; pl++) {
+ ppa.g.pg = pg;
+ ppa.g.pl = pl;
+
+ ret = nvm_bb_chunk_sense(dev, ppa);
+ if (ret < 0) /* io error */
+ return ret;
+ else if (ret == 0) {
+ meta->wp += geo->ws_min;
+ } else if (ret > 0) {
+ switch (ret) {
+ case NVM_RSP_ERR_EMPTYPAGE:
+ return 0;
+ case NVM_RSP_ERR_FAILCRC:
+ case NVM_RSP_ERR_FAILECC:
+ case NVM_RSP_WARN_HIGHECC:
+ meta->wp += geo->ws_min;
+ break;
+ default:
+ return -ret; /* other io error */
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * folds a bad block list from its plane representation to its
+ * chunk representation.
+ *
+ * If any of the planes status are bad or grown bad, the chunk is marked
+ * offline. If not bad, the first plane state acts as the chunk state.
+ */
+static int nvm_bb_to_chunk(struct nvm_dev *dev, struct ppa_addr ppa,
+ u8 *blks, int nr_blks, struct nvm_chk_meta *meta)
+{
+ struct nvm_geo *geo = &dev->geo;
+ int ret, blk, pl, offset, blktype;