diff options
| -rw-r--r-- | drivers/cxl/cxl.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index a3a4f18b25f2..7d07127eade3 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -61,6 +61,10 @@ #define CXL_HDM_DECODER0_SKIP_LOW(i) CXL_HDM_DECODER0_TL_LOW(i) #define CXL_HDM_DECODER0_SKIP_HIGH(i) CXL_HDM_DECODER0_TL_HIGH(i) +/* HDM decoder control register constants CXL 3.0 8.2.5.19.7 */ +#define CXL_DECODER_MIN_GRANULARITY 256 +#define CXL_DECODER_MAX_ENCODED_IG 6 + static inline int cxl_hdm_decoder_count(u32 cap_hdr) { int val = FIELD_GET(CXL_HDM_DECODER_COUNT_MASK, cap_hdr); @@ -71,9 +75,9 @@ static inline int cxl_hdm_decoder_count(u32 cap_hdr) /* Encode defined in CXL 2.0 8.2.5.12.7 HDM Decoder Control Register */ static inline int cxl_to_granularity(u16 ig, unsigned int *val) { - if (ig > 6) + if (ig > CXL_DECODER_MAX_ENCODED_IG) return -EINVAL; - *val = 256 << ig; + *val = CXL_DECODER_MIN_GRANULARITY << ig; return 0; } @@ -96,7 +100,7 @@ static inline int cxl_to_ways(u8 eniw, unsigned int *val) static inline int granularity_to_cxl(int g, u16 *ig) { - if (g > SZ_16K || g < 256 || !is_power_of_2(g)) + if (g > SZ_16K || g < CXL_DECODER_MIN_GRANULARITY || !is_power_of_2(g)) return -EINVAL; *ig = ilog2(g) - 8; return 0; @@ -246,7 +250,6 @@ enum cxl_decoder_type { */ #define CXL_DECODER_MAX_INTERLEAVE 16 -#define CXL_DECODER_MIN_GRANULARITY 256 /** * struct cxl_decoder - Common CXL HDM Decoder Attributes |