lightnvm: add mccap support

Some flash media has extended capabilities, such as programming SLC
pages on MLC/TLC flash, erase/program suspend, scramble and encryption.
MCCAP is introduced to detect support for these capabilities in the
command set.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index e5e396338319..5199c12fead0 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -376,6 +376,7 @@ static int nvm_core_init(struct nvm_dev *dev)
         dev->sec_size = grp->csecs;
         dev->oob_size = grp->sos;
         dev->sec_per_pg = grp->fpg_sz / grp->csecs;
+        dev->mccap = grp->mccap;
         memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
 
         dev->plane_mode = NVM_PLANE_SINGLE;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index aa35907714b8..b90d28344e3d 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -61,6 +61,12 @@ enum {
         NVM_BLK_T_GRWN_BAD      = 0x2,
         NVM_BLK_T_DEV           = 0x4,
         NVM_BLK_T_HOST          = 0x8,
+
+        /* Memory capabilities */
+        NVM_ID_CAP_SLC          = 0x1,
+        NVM_ID_CAP_CMD_SUSPEND  = 0x2,
+        NVM_ID_CAP_SCRAMBLE     = 0x4,
+        NVM_ID_CAP_ENCRYPT      = 0x8,
 };
 
 struct nvm_id_group {
@@ -278,6 +284,7 @@ struct nvm_dev {
         int blks_per_lun;
         int sec_size;
         int oob_size;
+        int mccap;
         struct nvm_addr_format ppaf;
 
         /* Calculated/Cached values. These do not reflect the actual usable