lightnvm: expose mccap in identify command

The mccap field is required for I/O command option support. It defines the
following flash access modes:

 * SLC mode
 * Erase/Program Suspension
 * Scramble On/Off
 * Encryption

It is slotted in between mpos and cpar, changing the offset for
cpar as well.

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

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 60687ed..52b311c 100644 (file)
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -169,8 +169,9 @@ struct nvme_nvm_id_group {
        __le32                  tbet;
        __le32                  tbem;
        __le32                  mpos;
+       __le32                  mccap;
        __le16                  cpar;
-       __u8                    reserved[910];
+       __u8                    reserved[906];
 } __packed;
 
 struct nvme_nvm_addr_format {
@@ -265,6 +266,7 @@ static int init_grps(struct nvm_id *nvm_id, struct nvme_nvm_id *nvme_nvm_id)
                dst->tbet = le32_to_cpu(src->tbet);
                dst->tbem = le32_to_cpu(src->tbem);
                dst->mpos = le32_to_cpu(src->mpos);
+               dst->mccap = le32_to_cpu(src->mccap);
 
                dst->cpar = le16_to_cpu(src->cpar);
        }

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 9b3dc1b..2572856 100644 (file)
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -74,6 +74,7 @@ struct nvm_id_group {
        u32     tbet;
        u32     tbem;
        u32     mpos;
+       u32     mccap;
        u16     cpar;
        u8      res[913];
 } __packed;