linux-kernel - [PATCH net-next 5/5] net: ipa: define QSB limits in configuration data

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Message-Id: <20210319152422.1803714-6-elder@linaro.org>
Date:   Fri, 19 Mar 2021 10:24:22 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     bjorn.andersson@...aro.org, evgreen@...omium.org,
        cpratapa@...eaurora.org, elder@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 5/5] net: ipa: define QSB limits in configuration data

Define the maximum number of reads and writes to configure for the
QSB masters used for IPA in configuration data.

We don't use these values yet; the next commit takes care of that.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_data-sc7180.c | 10 ++++++++++
 drivers/net/ipa/ipa_data-sdm845.c | 14 ++++++++++++++
 drivers/net/ipa/ipa_data.h        | 24 ++++++++++++++++++++++--
 3 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/ipa_data-sc7180.c b/drivers/net/ipa/ipa_data-sc7180.c
index f65abc19ae9d7..216f790b22b66 100644
--- a/drivers/net/ipa/ipa_data-sc7180.c
+++ b/drivers/net/ipa/ipa_data-sc7180.c
@@ -9,6 +9,14 @@
 #include "ipa_endpoint.h"
 #include "ipa_mem.h"
 
+/* QSB configuration for the SC7180 SoC. */
+static const struct ipa_qsb_data ipa_qsb_data[] = {
+	[IPA_QSB_MASTER_DDR] = {
+		.max_writes	= 8,
+		.max_reads	= 12,
+	},
+};
+
 /* Endpoint configuration for the SC7180 SoC. */
 static const struct ipa_gsi_endpoint_data ipa_gsi_endpoint_data[] = {
 	[IPA_ENDPOINT_AP_COMMAND_TX] = {
@@ -328,6 +336,8 @@ static const struct ipa_clock_data ipa_clock_data = {
 /* Configuration data for the SC7180 SoC. */
 const struct ipa_data ipa_data_sc7180 = {
 	.version	= IPA_VERSION_4_2,
+	.qsb_count	= ARRAY_SIZE(ipa_qsb_data),
+	.qsb_data	= ipa_qsb_data,
 	.endpoint_count	= ARRAY_SIZE(ipa_gsi_endpoint_data),
 	.endpoint_data	= ipa_gsi_endpoint_data,
 	.resource_data	= &ipa_resource_data,
diff --git a/drivers/net/ipa/ipa_data-sdm845.c b/drivers/net/ipa/ipa_data-sdm845.c
index 8cae9325eb08e..d9659fd22322a 100644
--- a/drivers/net/ipa/ipa_data-sdm845.c
+++ b/drivers/net/ipa/ipa_data-sdm845.c
@@ -11,6 +11,18 @@
 #include "ipa_endpoint.h"
 #include "ipa_mem.h"
 
+/* QSB configuration for the SDM845 SoC. */
+static const struct ipa_qsb_data ipa_qsb_data[] = {
+	[IPA_QSB_MASTER_DDR] = {
+		.max_writes	= 8,
+		.max_reads	= 8,
+	},
+	[IPA_QSB_MASTER_PCIE] = {
+		.max_writes	= 4,
+		.max_reads	= 12,
+	},
+};
+
 /* Endpoint configuration for the SDM845 SoC. */
 static const struct ipa_gsi_endpoint_data ipa_gsi_endpoint_data[] = {
 	[IPA_ENDPOINT_AP_COMMAND_TX] = {
@@ -353,6 +365,8 @@ static const struct ipa_clock_data ipa_clock_data = {
 /* Configuration data for the SDM845 SoC. */
 const struct ipa_data ipa_data_sdm845 = {
 	.version	= IPA_VERSION_3_5_1,
+	.qsb_count	= ARRAY_SIZE(ipa_qsb_data),
+	.qsb_data	= ipa_qsb_data,
 	.endpoint_count	= ARRAY_SIZE(ipa_gsi_endpoint_data),
 	.endpoint_data	= ipa_gsi_endpoint_data,
 	.resource_data	= &ipa_resource_data,
diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h
index b476fc373f7fe..d50cd5ae7714f 100644
--- a/drivers/net/ipa/ipa_data.h
+++ b/drivers/net/ipa/ipa_data.h
@@ -49,6 +49,22 @@
 #define IPA_RESOURCE_GROUP_SRC_MAX	5
 #define IPA_RESOURCE_GROUP_DST_MAX	5
 
+/** enum ipa_qsb_master_id - array index for IPA QSB configuration data */
+enum ipa_qsb_master_id {
+	IPA_QSB_MASTER_DDR,
+	IPA_QSB_MASTER_PCIE,
+};
+
+/**
+ * struct ipa_qsb_data - Qualcomm System Bus configuration data
+ * @max_writes:	Maximum outstanding write requests for this master
+ * @max_reads:	Maximum outstanding read requests for this master
+ */
+struct ipa_qsb_data {
+	u8 max_writes;
+	u8 max_reads;
+};
+
 /**
  * struct gsi_channel_data - GSI channel configuration data
  * @tre_count:		number of TREs in the channel ring
@@ -285,14 +301,18 @@ struct ipa_clock_data {
 /**
  * struct ipa_data - combined IPA/GSI configuration data
  * @version:		IPA hardware version
- * @endpoint_count:	number of entries in endpoint_data array
+ * @qsb_count:		number of entries in the qsb_data array
+ * @qsb_data:		Qualcomm System Bus configuration data
+ * @endpoint_count:	number of entries in the endpoint_data array
  * @endpoint_data:	IPA endpoint/GSI channel data
  * @resource_data:	IPA resource configuration data
- * @mem_count:		number of entries in mem_data array
+ * @mem_count:		number of entries in the mem_data array
  * @mem_data:		IPA-local shared memory region data
  */
 struct ipa_data {
 	enum ipa_version version;
+	u32 qsb_count;		/* # entries in qsb_data[] */
+	const struct ipa_qsb_data *qsb_data;
 	u32 endpoint_count;	/* # entries in endpoint_data[] */
 	const struct ipa_gsi_endpoint_data *endpoint_data;
 	const struct ipa_resource_data *resource_data;
-- 
2.27.0