libnvdimm, btt: refactor map entry operations with macros
Add helpers for converting a raw map entry to just the block number, or
either of the 'e' or 'z' flags in preparation for actually using the
error flag to mark blocks with media errors.
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index a5e4134..bb816bc 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -106,7 +106,7 @@ static int btt_map_write(struct arena_info *arena, u32 lba, u32 mapping,
* This 'mapping' is supposed to be just the LBA mapping, without
* any flags set, so strip the flag bits.
*/
- mapping &= MAP_LBA_MASK;
+ mapping = ent_lba(mapping);
ze = (z_flag << 1) + e_flag;
switch (ze) {
@@ -155,10 +155,10 @@ static int btt_map_read(struct arena_info *arena, u32 lba, u32 *mapping,
raw_mapping = le32_to_cpu(in);
- z_flag = (raw_mapping & MAP_TRIM_MASK) >> MAP_TRIM_SHIFT;
- e_flag = (raw_mapping & MAP_ERR_MASK) >> MAP_ERR_SHIFT;
+ z_flag = ent_z_flag(raw_mapping);
+ e_flag = ent_e_flag(raw_mapping);
ze = (z_flag << 1) + e_flag;
- postmap = raw_mapping & MAP_LBA_MASK;
+ postmap = ent_lba(raw_mapping);
/* Reuse the {z,e}_flag variables for *trim and *error */
z_flag = 0;