diff options
author | Alex Elder <elder@linaro.org> | 2020-11-16 17:38:02 -0600 |
---|---|---|
committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-18 15:53:49 -0800 |
commit | 3413e61337ded76cd17130b4b1ecf339c2b1c37d (patch) | |
tree | 9c73140c7f2fbf6b9760b5281d704ab5b5593d35 /drivers | |
parent | 8701cb00d78a41a222fd770691e297c47ecbb218 (diff) |
net: ipa: fix up IPA register comments
Revise or add comments in "ipa_reg.h" for to provide more
information, and to improve clarity and consistency.
- Always provide a comment to define when a register or field is
supported (or not) for certain versions of IPA hardware.
- Try to be specific about *which* or *how many* definitions
a comment refers to.
- Move comments stating that ipa->available defines the valid
bits in various registers *above* the register offset
definition, to avoid some checkpatch.pl warnings.
No code is changed by this patch.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ipa/ipa_reg.h | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/net/ipa/ipa_reg.h b/drivers/net/ipa/ipa_reg.h index 4bc00d30ff77..08473e513477 100644 --- a/drivers/net/ipa/ipa_reg.h +++ b/drivers/net/ipa/ipa_reg.h @@ -67,12 +67,14 @@ struct ipa; #define IPA_REG_ENABLED_PIPES_OFFSET 0x00000038 +/* The next field is not supported for IPA v4.1 */ #define IPA_REG_COMP_CFG_OFFSET 0x0000003c #define ENABLE_FMASK GENMASK(0, 0) #define GSI_SNOC_BYPASS_DIS_FMASK GENMASK(1, 1) #define GEN_QMB_0_SNOC_BYPASS_DIS_FMASK GENMASK(2, 2) #define GEN_QMB_1_SNOC_BYPASS_DIS_FMASK GENMASK(3, 3) #define IPA_DCMP_FAST_CLK_EN_FMASK GENMASK(4, 4) +/* The remaining fields are not present for IPA v3.5.1 */ #define IPA_QMB_SELECT_CONS_EN_FMASK GENMASK(5, 5) #define IPA_QMB_SELECT_PROD_EN_FMASK GENMASK(6, 6) #define GSI_MULTI_INORDER_RD_DIS_FMASK GENMASK(7, 7) @@ -110,6 +112,7 @@ struct ipa; #define TX_0_FMASK GENMASK(19, 19) #define TX_1_FMASK GENMASK(20, 20) #define FNR_FMASK GENMASK(21, 21) +/* The remaining fields are not present for IPA v3.5.1 */ #define QSB2AXI_CMDQ_L_FMASK GENMASK(22, 22) #define AGGR_WRAPPER_FMASK GENMASK(23, 23) #define RAM_SLAVEWAY_FMASK GENMASK(24, 24) @@ -138,10 +141,11 @@ struct ipa; #define IPA_REG_QSB_MAX_READS_OFFSET 0x00000078 #define GEN_QMB_0_MAX_READS_FMASK GENMASK(3, 0) #define GEN_QMB_1_MAX_READS_FMASK GENMASK(7, 4) -/* The next two fields are present for IPA v4.0 and above */ +/* The next two fields are not present for IPA v3.5.1 */ #define GEN_QMB_0_MAX_READS_BEATS_FMASK GENMASK(23, 16) #define GEN_QMB_1_MAX_READS_BEATS_FMASK GENMASK(31, 24) +/* ipa->available defines the valid bits in the STATE_AGGR_ACTIVE register */ static inline u32 ipa_reg_state_aggr_active_offset(enum ipa_version version) { if (version == IPA_VERSION_3_5_1) @@ -149,7 +153,6 @@ static inline u32 ipa_reg_state_aggr_active_offset(enum ipa_version version) return 0x000000b4; } -/* ipa->available defines the valid bits in the STATE_AGGR_ACTIVE register */ static inline u32 ipa_reg_filt_rout_hash_en_offset(enum ipa_version version) { @@ -207,10 +210,11 @@ static inline u32 ipa_reg_bcr_val(enum ipa_version version) return 0x00000000; } +/* The value of the next register must be a multiple of 8 */ #define IPA_REG_LOCAL_PKT_PROC_CNTXT_BASE_OFFSET 0x000001e8 -#define IPA_REG_AGGR_FORCE_CLOSE_OFFSET 0x000001ec /* ipa->available defines the valid bits in the AGGR_FORCE_CLOSE register */ +#define IPA_REG_AGGR_FORCE_CLOSE_OFFSET 0x000001ec /* The internal inactivity timer clock is used for the aggregation timer */ #define TIMER_FREQUENCY 32000 /* 32 KHz inactivity timer clock */ @@ -231,14 +235,14 @@ static inline u32 ipa_aggr_granularity_val(u32 usec) #define TX0_PREFETCH_DISABLE_FMASK GENMASK(0, 0) #define TX1_PREFETCH_DISABLE_FMASK GENMASK(1, 1) #define PREFETCH_ALMOST_EMPTY_SIZE_FMASK GENMASK(4, 2) -/* The next fields are present for IPA v4.0 and above */ +/* The next six fields are present for IPA v4.0 and above */ #define PREFETCH_ALMOST_EMPTY_SIZE_TX0_FMASK GENMASK(5, 2) #define DMAW_SCND_OUTSD_PRED_THRESHOLD_FMASK GENMASK(9, 6) #define DMAW_SCND_OUTSD_PRED_EN_FMASK GENMASK(10, 10) #define DMAW_MAX_BEATS_256_DIS_FMASK GENMASK(11, 11) #define PA_MASK_EN_FMASK GENMASK(12, 12) #define PREFETCH_ALMOST_EMPTY_SIZE_TX1_FMASK GENMASK(16, 13) -/* The last two fields are present for IPA v4.2 and above */ +/* The next two fields are present for IPA v4.2 only */ #define SSPND_PA_NO_START_STATE_FMASK GENMASK(18, 18) #define SSPND_PA_NO_BQ_STATE_FMASK GENMASK(19, 19) @@ -308,13 +312,16 @@ static inline u32 ipa_resource_group_dst_count(enum ipa_version version) (0x00000504 + 0x0020 * (rt)) #define IPA_REG_DST_RSRC_GRP_45_RSRC_TYPE_N_OFFSET(rt) \ (0x00000508 + 0x0020 * (rt)) +/* The next four fields are used for all resource group registers */ #define X_MIN_LIM_FMASK GENMASK(5, 0) #define X_MAX_LIM_FMASK GENMASK(13, 8) +/* The next two fields are not always present (if resource count is odd) */ #define Y_MIN_LIM_FMASK GENMASK(21, 16) #define Y_MAX_LIM_FMASK GENMASK(29, 24) #define IPA_REG_ENDP_INIT_CTRL_N_OFFSET(ep) \ (0x00000800 + 0x0070 * (ep)) +/* The next field should only used for IPA v3.5.1 */ #define ENDP_SUSPEND_FMASK GENMASK(0, 0) #define ENDP_DELAY_FMASK GENMASK(1, 1) @@ -379,7 +386,7 @@ static inline u32 ipa_resource_group_dst_count(enum ipa_version version) /* Valid only for RX (IPA producer) endpoints */ #define IPA_REG_ENDP_INIT_HOL_BLOCK_TIMER_N_OFFSET(rxep) \ (0x00000830 + 0x0070 * (rxep)) -/* The next fields are present for IPA v4.2 only */ +/* The next two fields are present for IPA v4.2 only */ #define BASE_VALUE_FMASK GENMASK(4, 0) #define SCALE_FMASK GENMASK(12, 8) @@ -417,10 +424,10 @@ static inline u32 rsrc_grp_encoded(enum ipa_version version, u32 rsrc_grp) #define STATUS_EN_FMASK GENMASK(0, 0) #define STATUS_ENDP_FMASK GENMASK(5, 1) #define STATUS_LOCATION_FMASK GENMASK(8, 8) -/* The next field is present for IPA v4.0 and above */ +/* The next field is not present for IPA v3.5.1 */ #define STATUS_PKT_SUPPRESS_FMASK GENMASK(9, 9) -/* "er" is either an endpoint ID (for filters) or a route ID (for routes) */ +/* The next register is only present for IPA versions that support hashing */ #define IPA_REG_ENDP_FILTER_ROUTER_HSH_CFG_N_OFFSET(er) \ (0x0000085c + 0x0070 * (er)) #define FILTER_HASH_MSK_SRC_ID_FMASK GENMASK(0, 0) @@ -461,23 +468,23 @@ static inline u32 rsrc_grp_encoded(enum ipa_version version, u32 rsrc_grp) #define IPA_REG_IRQ_UC_EE_N_OFFSET(ee) \ (0x0000301c + 0x1000 * (ee)) +/* ipa->available defines the valid bits in the SUSPEND_INFO register */ #define IPA_REG_IRQ_SUSPEND_INFO_OFFSET \ IPA_REG_IRQ_SUSPEND_INFO_EE_N_OFFSET(GSI_EE_AP) #define IPA_REG_IRQ_SUSPEND_INFO_EE_N_OFFSET(ee) \ (0x00003030 + 0x1000 * (ee)) -/* ipa->available defines the valid bits in the SUSPEND_INFO register */ +/* ipa->available defines the valid bits in the IRQ_SUSPEND_EN register */ #define IPA_REG_IRQ_SUSPEND_EN_OFFSET \ IPA_REG_IRQ_SUSPEND_EN_EE_N_OFFSET(GSI_EE_AP) #define IPA_REG_IRQ_SUSPEND_EN_EE_N_OFFSET(ee) \ (0x00003034 + 0x1000 * (ee)) -/* ipa->available defines the valid bits in the IRQ_SUSPEND_EN register */ +/* ipa->available defines the valid bits in the IRQ_SUSPEND_CLR register */ #define IPA_REG_IRQ_SUSPEND_CLR_OFFSET \ IPA_REG_IRQ_SUSPEND_CLR_EE_N_OFFSET(GSI_EE_AP) #define IPA_REG_IRQ_SUSPEND_CLR_EE_N_OFFSET(ee) \ (0x00003038 + 0x1000 * (ee)) -/* ipa->available defines the valid bits in the IRQ_SUSPEND_CLR register */ /** enum ipa_cs_offload_en - checksum offload field in ENDP_INIT_CFG_N */ enum ipa_cs_offload_en { |