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net: ipa: add support to code for IPA v4.5

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Update the IPA code to make use of the updated IPA v4.5 register
definitions.  Generally what this patch does is, if IPA v4.5
hardware is in use:
  - Ensure new registers or fields in IPA v4.5 are updated where
    required
  - Ensure registers or fields not supported in IPA v4.5 are not
    examined when read, or are set to 0 when written
It does this while preserving the existing functionality for IPA
versions lower than v4.5.

The values to program for QSB_MAX_READS and QSB_MAX_WRITES and the
source and destination resource counts are updated to be correct for
all versions through v4.5 as well.

Note that IPA_RESOURCE_GROUP_SRC_MAX and IPA_RESOURCE_GROUP_DST_MAX
already reflect that 5 is an acceptable number of resources (which
IPA v4.5 implements).

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alex Elder 2020-11-25 14:45:20 -06:00 committed by Jakub Kicinski
parent 1af15c2a78
commit 8bfc4e21d5
3 changed files with 57 additions and 23 deletions
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10
drivers/net/ipa/ipa_endpoint.c
View File

@ -520,7 +520,7 @@ static void ipa_endpoint_init_hdr(struct ipa_endpoint *endpoint)
/* HDR_ADDITIONAL_CONST_LEN is 0; (RX only) */
/* HDR_A5_MUX is 0 */
/* HDR_LEN_INC_DEAGG_HDR is 0 */
/* HDR_METADATA_REG_VALID is 0 (TX only) */
/* HDR_METADATA_REG_VALID is 0 (TX only, version < v4.5) */
}
iowrite32(val, ipa->reg_virt + offset);
@ -655,6 +655,7 @@ static void ipa_endpoint_init_aggr(struct ipa_endpoint *endpoint)
/* other fields ignored */
}
/* AGGR_FORCE_CLOSE is 0 */
/* AGGR_GRAN_SEL is 0 for IPA v4.5 */
} else {
val |= u32_encode_bits(IPA_BYPASS_AGGR, AGGR_EN_FMASK);
/* other fields ignored */
@ -865,9 +866,10 @@ static void ipa_endpoint_status(struct ipa_endpoint *endpoint)
val |= u32_encode_bits(status_endpoint_id,
STATUS_ENDP_FMASK);
}
/* STATUS_LOCATION is 0 (status element precedes packet) */
/* The next field is present for IPA v4.0 and above */
/* STATUS_PKT_SUPPRESS_FMASK is 0 */
/* STATUS_LOCATION is 0, meaning status element precedes
* packet (not present for IPA v4.5)
*/
/* STATUS_PKT_SUPPRESS_FMASK is 0 (not present for v3.5.1) */
}
iowrite32(val, ipa->reg_virt + offset);

63
drivers/net/ipa/ipa_main.c
View File

@ -230,8 +230,10 @@ static void ipa_hardware_config_comp(struct ipa *ipa)
val &= ~IPA_QMB_SELECT_CONS_EN_FMASK;
val &= ~IPA_QMB_SELECT_PROD_EN_FMASK;
val &= ~IPA_QMB_SELECT_GLOBAL_EN_FMASK;
} else {
} else if (ipa->version < IPA_VERSION_4_5) {
val |= GSI_MULTI_AXI_MASTERS_DIS_FMASK;
} else {
/* For IPA v4.5 IPA_FULL_FLUSH_WAIT_RSC_CLOSE_EN is 0 */
}
val |= GSI_MULTI_INORDER_RD_DIS_FMASK;
@ -243,25 +245,47 @@ static void ipa_hardware_config_comp(struct ipa *ipa)
/* Configure DDR and PCIe max read/write QSB values */
static void ipa_hardware_config_qsb(struct ipa *ipa)
{
enum ipa_version version = ipa->version;
u32 max0;
u32 max1;
u32 val;
/* QMB_0 represents DDR; QMB_1 represents PCIe (not present in 4.2) */
/* QMB_0 represents DDR; QMB_1 represents PCIe */
val = u32_encode_bits(8, GEN_QMB_0_MAX_WRITES_FMASK);
if (ipa->version == IPA_VERSION_4_2)
val |= u32_encode_bits(0, GEN_QMB_1_MAX_WRITES_FMASK);
else
val |= u32_encode_bits(4, GEN_QMB_1_MAX_WRITES_FMASK);
switch (version) {
case IPA_VERSION_4_2:
max1 = 0; /* PCIe not present */
break;
case IPA_VERSION_4_5:
max1 = 8;
break;
default:
max1 = 4;
break;
}
val |= u32_encode_bits(max1, GEN_QMB_1_MAX_WRITES_FMASK);
iowrite32(val, ipa->reg_virt + IPA_REG_QSB_MAX_WRITES_OFFSET);
if (ipa->version == IPA_VERSION_3_5_1) {
val = u32_encode_bits(8, GEN_QMB_0_MAX_READS_FMASK);
val |= u32_encode_bits(12, GEN_QMB_1_MAX_READS_FMASK);
} else {
val = u32_encode_bits(12, GEN_QMB_0_MAX_READS_FMASK);
if (ipa->version == IPA_VERSION_4_2)
val |= u32_encode_bits(0, GEN_QMB_1_MAX_READS_FMASK);
else
val |= u32_encode_bits(12, GEN_QMB_1_MAX_READS_FMASK);
max1 = 12;
switch (version) {
case IPA_VERSION_3_5_1:
max0 = 8;
break;
case IPA_VERSION_4_0:
case IPA_VERSION_4_1:
max0 = 12;
break;
case IPA_VERSION_4_2:
max0 = 12;
max1 = 0; /* PCIe not present */
break;
case IPA_VERSION_4_5:
max0 = 16;
break;
}
val = u32_encode_bits(max0, GEN_QMB_0_MAX_READS_FMASK);
val |= u32_encode_bits(max1, GEN_QMB_1_MAX_READS_FMASK);
if (version != IPA_VERSION_3_5_1) {
/* GEN_QMB_0_MAX_READS_BEATS is 0 */
/* GEN_QMB_1_MAX_READS_BEATS is 0 */
}
@ -294,7 +318,7 @@ static void ipa_idle_indication_cfg(struct ipa *ipa,
*/
static void ipa_hardware_dcd_config(struct ipa *ipa)
{
/* Recommended values for IPA 3.5 according to IPA HPG */
/* Recommended values for IPA 3.5 and later according to IPA HPG */
ipa_idle_indication_cfg(ipa, 256, false);
}
@ -320,13 +344,14 @@ static void ipa_hardware_config(struct ipa *ipa)
iowrite32(val, ipa->reg_virt + IPA_REG_BCR_OFFSET);
}
if (version != IPA_VERSION_3_5_1) {
/* Enable open global clocks (hardware workaround) */
/* Implement some hardware workarounds */
if (version != IPA_VERSION_3_5_1 && version < IPA_VERSION_4_5) {
/* Enable open global clocks (not needed for IPA v4.5) */
val = GLOBAL_FMASK;
val |= GLOBAL_2X_CLK_FMASK;
iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET);
/* Disable PA mask to allow HOLB drop (hardware workaround) */
/* Disable PA mask to allow HOLB drop */
val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
val &= ~PA_MASK_EN_FMASK;
iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);

7
drivers/net/ipa/ipa_reg.h
View File

@ -238,6 +238,7 @@ static inline u32 ipa_aggr_granularity_val(u32 usec)
return DIV_ROUND_CLOSEST(usec * TIMER_FREQUENCY, USEC_PER_SEC) - 1;
}
/* The next register is not present for IPA v4.5 */
#define IPA_REG_TX_CFG_OFFSET 0x000001fc
/* The first three fields are present for IPA v3.5.1 only */
#define TX0_PREFETCH_DISABLE_FMASK GENMASK(0, 0)
@ -285,6 +286,9 @@ static inline u32 ipa_resource_group_src_count(enum ipa_version version)
case IPA_VERSION_4_2:
return 1;
case IPA_VERSION_4_5:
return 5;
default:
return 0;
}
@ -304,6 +308,9 @@ static inline u32 ipa_resource_group_dst_count(enum ipa_version version)
case IPA_VERSION_4_2:
return 1;
case IPA_VERSION_4_5:
return 5;
default:
return 0;
}