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Subject[PATCH 05/13] lightnvm: expose mccap in identify command
Date
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>
---
drivers/nvme/host/lightnvm.c | 4 +++-
include/linux/lightnvm.h | 1 +
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 60687ed..52b311c 100644
--- 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
--- 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;
--
2.1.4


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