lightnvm: implement get log report chunk helpers
The 2.0 spec provides a report chunk log page that can be retrieved
using the stangard nvme get log page. This replaces the dedicated
get/put bad block table in 1.2.
This patch implements the helper functions to allow targets retrieve the
chunk metadata using get log page. It makes nvme_get_log_ext available
outside of nvme core so that we can use it form lightnvm.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index f3b273e..da45efa 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -81,10 +81,13 @@ struct nvm_rq;
struct nvm_id;
struct nvm_dev;
struct nvm_tgt_dev;
+struct nvm_chk_meta;
typedef int (nvm_id_fn)(struct nvm_dev *);
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_get_chk_meta_fn)(struct nvm_dev *, struct nvm_chk_meta *,
+ sector_t, int);
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvm_submit_io_sync_fn)(struct nvm_dev *, struct nvm_rq *);
typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *);
@@ -98,6 +101,8 @@ struct nvm_dev_ops {
nvm_op_bb_tbl_fn *get_bb_tbl;
nvm_op_set_bb_fn *set_bb_tbl;
+ nvm_get_chk_meta_fn *get_chk_meta;
+
nvm_submit_io_fn *submit_io;
nvm_submit_io_sync_fn *submit_io_sync;
@@ -227,6 +232,20 @@ struct nvm_addrf {
u64 rsv_mask[2];
};
+/*
+ * Note: The structure size is linked to nvme_nvm_chk_meta such that the same
+ * buffer can be used when converting from little endian to cpu addressing.
+ */
+struct nvm_chk_meta {
+ u8 state;
+ u8 type;
+ u8 wi;
+ u8 rsvd[5];
+ u64 slba;
+ u64 cnlb;
+ u64 wp;
+};
+
struct nvm_target {
struct list_head list;
struct nvm_tgt_dev *dev;
@@ -492,6 +511,11 @@ extern struct nvm_dev *nvm_alloc_dev(int);
extern int nvm_register(struct nvm_dev *);
extern void nvm_unregister(struct nvm_dev *);
+
+extern int nvm_get_chunk_meta(struct nvm_tgt_dev *tgt_dev,
+ struct nvm_chk_meta *meta, struct ppa_addr ppa,
+ int nchks);
+
extern int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr *,
int, int);
extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *);