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Subject[PATCH 3/8] lightnvm: add support for 2.0 address format
Date
Add support for 2.0 address format. Also, align address bits for 1.2 and 2.0 to
align.

Signed-off-by: Javier González <javier@cnexlabs.com>
---
include/linux/lightnvm.h | 45 ++++++++++++++++++++++++++++++++-------------
1 file changed, 32 insertions(+), 13 deletions(-)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 6a567bd19b73..e035ae4c9acc 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -16,12 +16,21 @@ enum {
NVM_IOTYPE_GC = 1,
};

-#define NVM_BLK_BITS (16)
-#define NVM_PG_BITS (16)
-#define NVM_SEC_BITS (8)
-#define NVM_PL_BITS (8)
-#define NVM_LUN_BITS (8)
-#define NVM_CH_BITS (7)
+/* 1.2 format */
+#define NVM_12_CH_BITS (8)
+#define NVM_12_LUN_BITS (8)
+#define NVM_12_BLK_BITS (16)
+#define NVM_12_PG_BITS (16)
+#define NVM_12_PL_BITS (4)
+#define NVM_12_SEC_BITS (4)
+#define NVM_12_RESERVED (8)
+
+/* 2.0 format */
+#define NVM_20_CH_BITS (8)
+#define NVM_20_LUN_BITS (8)
+#define NVM_20_CHK_BITS (16)
+#define NVM_20_SEC_BITS (24)
+#define NVM_20_RESERVED (8)

enum {
NVM_OCSSD_SPEC_12 = 12,
@@ -31,16 +40,26 @@ enum {
struct ppa_addr {
/* Generic structure for all addresses */
union {
+ /* 1.2 device format */
struct {
- u64 blk : NVM_BLK_BITS;
- u64 pg : NVM_PG_BITS;
- u64 sec : NVM_SEC_BITS;
- u64 pl : NVM_PL_BITS;
- u64 lun : NVM_LUN_BITS;
- u64 ch : NVM_CH_BITS;
- u64 reserved : 1;
+ u64 ch : NVM_12_CH_BITS;
+ u64 lun : NVM_12_LUN_BITS;
+ u64 blk : NVM_12_BLK_BITS;
+ u64 pg : NVM_12_PG_BITS;
+ u64 pl : NVM_12_PL_BITS;
+ u64 sec : NVM_12_SEC_BITS;
+ u64 reserved : NVM_12_RESERVED;
} g;

+ /* 2.0 device format */
+ struct {
+ u64 ch : NVM_20_CH_BITS;
+ u64 lun : NVM_20_LUN_BITS;
+ u64 chk : NVM_20_CHK_BITS;
+ u64 sec : NVM_20_SEC_BITS;
+ u64 reserved : NVM_20_RESERVED;
+ } m;
+
struct {
u64 line : 63;
u64 is_cached : 1;
--
2.7.4
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