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Message-Id: <20231122230909.895482-4-elder@linaro.org>
Date:   Wed, 22 Nov 2023 17:09:07 -0600
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     andersson@...nel.org, konrad.dybcio@...aro.org, agross@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, mka@...omium.org, quic_cpratapa@...cinc.com,
        quic_avuyyuru@...cinc.com, quic_jponduru@...cinc.com,
        quic_subashab@...cinc.com, elder@...nel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 3/5] net: ipa: prepare for IPA v5.5

For IPA v5.5+, the QTIME_TIMESTAMP_CFG register no longer defines
two fields in the DPL timestamp.  Make the code referencing those
fields in ipa_qtime_config() conditional based on IPA version.

IPA v5.0+ supports the IPA_MEM_AP_V4_FILTER and IPA_MEM_AP_V6_FILTER
memory regions.  Update ipa_mem_id_valid() to reflect that.

IPA v5.5 no longer supports a few register fields, adds some others,
and removes support for a few IPA interrupt types.  Update
"ipa_reg.h" to include information about IPA v5.5.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_main.c |  9 ++++++---
 drivers/net/ipa/ipa_mem.c  |  2 +-
 drivers/net/ipa/ipa_reg.h  | 32 +++++++++++++++++++-------------
 3 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index da853353a5c72..8893290e132b4 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -74,6 +74,7 @@
 #define IPA_PAS_ID		15
 
 /* Shift of 19.2 MHz timestamp to achieve lower resolution timestamps */
+/* IPA v5.5+ does not specify Qtime timestamp config for DPL */
 #define DPL_TIMESTAMP_SHIFT	14	/* ~1.172 kHz, ~853 usec per tick */
 #define TAG_TIMESTAMP_SHIFT	14
 #define NAT_TIMESTAMP_SHIFT	24	/* ~1.144 Hz, ~874 msec per tick */
@@ -376,9 +377,11 @@ static void ipa_qtime_config(struct ipa *ipa)
 	iowrite32(0, ipa->reg_virt + reg_offset(reg));
 
 	reg = ipa_reg(ipa, QTIME_TIMESTAMP_CFG);
-	/* Set DPL time stamp resolution to use Qtime (instead of 1 msec) */
-	val = reg_encode(reg, DPL_TIMESTAMP_LSB, DPL_TIMESTAMP_SHIFT);
-	val |= reg_bit(reg, DPL_TIMESTAMP_SEL);
+	if (ipa->version < IPA_VERSION_5_5) {
+		/* Set DPL time stamp resolution to use Qtime (not 1 msec) */
+		val = reg_encode(reg, DPL_TIMESTAMP_LSB, DPL_TIMESTAMP_SHIFT);
+		val |= reg_bit(reg, DPL_TIMESTAMP_SEL);
+	}
 	/* Configure tag and NAT Qtime timestamp resolution as well */
 	val = reg_encode(reg, TAG_TIMESTAMP_LSB, TAG_TIMESTAMP_SHIFT);
 	val = reg_encode(reg, NAT_TIMESTAMP_LSB, NAT_TIMESTAMP_SHIFT);
diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c
index db6ada2343afc..694960537ecda 100644
--- a/drivers/net/ipa/ipa_mem.c
+++ b/drivers/net/ipa/ipa_mem.c
@@ -165,7 +165,7 @@ static bool ipa_mem_id_valid(struct ipa *ipa, enum ipa_mem_id mem_id)
 
 	case IPA_MEM_AP_V4_FILTER:
 	case IPA_MEM_AP_V6_FILTER:
-		if (version != IPA_VERSION_5_0)
+		if (version < IPA_VERSION_5_0)
 			return false;
 		break;
 
diff --git a/drivers/net/ipa/ipa_reg.h b/drivers/net/ipa/ipa_reg.h
index aa1cbe76a4505..23231f0df93a6 100644
--- a/drivers/net/ipa/ipa_reg.h
+++ b/drivers/net/ipa/ipa_reg.h
@@ -277,8 +277,8 @@ enum ipa_reg_idle_indication_cfg_field_id {
 
 /* QTIME_TIMESTAMP_CFG register */
 enum ipa_reg_qtime_timestamp_cfg_field_id {
-	DPL_TIMESTAMP_LSB,
-	DPL_TIMESTAMP_SEL,
+	DPL_TIMESTAMP_LSB,				/* Not IPA v5.5+ */
+	DPL_TIMESTAMP_SEL,				/* Not IPA v5.5+ */
 	TAG_TIMESTAMP_LSB,
 	NAT_TIMESTAMP_LSB,
 };
@@ -329,6 +329,7 @@ enum ipa_reg_endp_init_cfg_field_id {
 	CS_OFFLOAD_EN,
 	CS_METADATA_HDR_OFFSET,
 	CS_GEN_QMB_MASTER_SEL,
+	PIPE_REPLICATE_EN,				/* IPA v5.5+ */
 };
 
 /** enum ipa_cs_offload_en - ENDP_INIT_CFG register CS_OFFLOAD_EN field value */
@@ -387,7 +388,7 @@ enum ipa_reg_endp_init_mode_field_id {
 	DCPH_ENABLE,					/* IPA v4.5+ */
 	DEST_PIPE_INDEX,
 	BYTE_THRESHOLD,
-	PIPE_REPLICATION_EN,
+	PIPE_REPLICATION_EN,				/* Not IPA v5.5+ */
 	PAD_EN,
 	HDR_FTCH_DISABLE,				/* IPA v4.5+ */
 	DRBIP_ACL_ENABLE,				/* IPA v4.9+ */
@@ -412,6 +413,7 @@ enum ipa_reg_endp_init_aggr_field_id {
 	FORCE_CLOSE,
 	HARD_BYTE_LIMIT_EN,
 	AGGR_GRAN_SEL,
+	AGGR_COAL_L2,					/* IPA v5.5+ */
 };
 
 /** enum ipa_aggr_en - ENDP_INIT_AGGR register AGGR_EN field value */
@@ -585,9 +587,11 @@ enum ipa_reg_endp_cache_cfg_field_id {
  * @IPA_IRQ_DRBIP_PKT_EXCEED_MAX_SIZE_EN: (Not currently used)
  * @IPA_IRQ_DRBIP_DATA_SCTR_CFG_ERROR_EN: (Not currently used)
  * @IPA_IRQ_DRBIP_IMM_CMD_NO_FLSH_HZRD_EN: (Not currently used)
+ * @IPA_IRQ_ERROR_NON_FATAL:		(Not currently used)
+ * @IPA_IRQ_ERROR_FATAL:		(Not currently used)
  */
 enum ipa_irq_id {
-	IPA_IRQ_BAD_SNOC_ACCESS			= 0x0,
+	IPA_IRQ_BAD_SNOC_ACCESS			= 0x0,	/* Not IPA v5.5+ */
 	IPA_IRQ_EOT_COAL			= 0x1,	/* Not IPA v3.5+ */
 	IPA_IRQ_UC_0				= 0x2,
 	IPA_IRQ_UC_1				= 0x3,
@@ -596,11 +600,11 @@ enum ipa_irq_id {
 	IPA_IRQ_UC_IN_Q_NOT_EMPTY		= 0x6,
 	IPA_IRQ_UC_RX_CMD_Q_NOT_FULL		= 0x7,
 	IPA_IRQ_PROC_UC_ACK_Q_NOT_EMPTY		= 0x8,
-	IPA_IRQ_RX_ERR				= 0x9,
-	IPA_IRQ_DEAGGR_ERR			= 0xa,
-	IPA_IRQ_TX_ERR				= 0xb,
-	IPA_IRQ_STEP_MODE			= 0xc,
-	IPA_IRQ_PROC_ERR			= 0xd,
+	IPA_IRQ_RX_ERR				= 0x9,	/* Not IPA v5.5+ */
+	IPA_IRQ_DEAGGR_ERR			= 0xa,	/* Not IPA v5.5+ */
+	IPA_IRQ_TX_ERR				= 0xb,	/* Not IPA v5.5+ */
+	IPA_IRQ_STEP_MODE			= 0xc,	/* Not IPA v5.5+ */
+	IPA_IRQ_PROC_ERR			= 0xd,	/* Not IPA v5.5+ */
 	IPA_IRQ_TX_SUSPEND			= 0xe,
 	IPA_IRQ_TX_HOLB_DROP			= 0xf,
 	IPA_IRQ_BAM_GSI_IDLE			= 0x10,
@@ -613,10 +617,12 @@ enum ipa_irq_id {
 	IPA_IRQ_GSI_EE				= 0x17,
 	IPA_IRQ_GSI_IPA_IF_TLV_RCVD		= 0x18,
 	IPA_IRQ_GSI_UC				= 0x19,
-	IPA_IRQ_TLV_LEN_MIN_DSM			= 0x1a,	/* IPA v4.5+ */
-	IPA_IRQ_DRBIP_PKT_EXCEED_MAX_SIZE_EN	= 0x1b,	/* IPA v4.9+ */
-	IPA_IRQ_DRBIP_DATA_SCTR_CFG_ERROR_EN	= 0x1c,	/* IPA v4.9+ */
-	IPA_IRQ_DRBIP_IMM_CMD_NO_FLSH_HZRD_EN	= 0x1d,	/* IPA v4.9+ */
+	IPA_IRQ_TLV_LEN_MIN_DSM			= 0x1a,	/* IPA v4.5-v5.2 */
+	IPA_IRQ_DRBIP_PKT_EXCEED_MAX_SIZE_EN	= 0x1b,	/* IPA v4.9-v5.2 */
+	IPA_IRQ_DRBIP_DATA_SCTR_CFG_ERROR_EN	= 0x1c,	/* IPA v4.9-v5.2 */
+	IPA_IRQ_DRBIP_IMM_CMD_NO_FLSH_HZRD_EN	= 0x1d,	/* IPA v4.9-v5.2 */
+	IPA_IRQ_ERROR_NON_FATAL			= 0x1e,	/* IPA v5.5+ */
+	IPA_IRQ_ERROR_FATAL			= 0x1f,	/* IPA v5.5+ */
 	IPA_IRQ_COUNT,				/* Last; not an id */
 };
 
-- 
2.34.1

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