net: ipa: add IPA v4.5 configuration data

Add support for the SDX55 SoC, which includes IPA version 4.5.

Starting with IPA v4.5, a few of the memory regions have a different
number of "canary" values; update comments in the where the region
identifers are defined to accurately reflect that.

I'll note three differences in SDX55 versus the other two existing
platforms (SDM845 and SC7180):
  - SDX55 uses a 32-bit Linux kernel
  - SDX55 has four interconnects rather than three
  - SDX55 uses IPA v4.5, which uses inline checksum offload
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipa/Makefile

@@ -9,4 +9,5 @@ ipa-y			:=	ipa_main.o ipa_clock.o ipa_reg.o ipa_mem.o \
 				ipa_endpoint.o ipa_cmd.o ipa_modem.o \
 				ipa_resource.o ipa_qmi.o ipa_qmi_msg.o
 
-ipa-y			+=	ipa_data-v3.5.1.o ipa_data-v4.2.o
+ipa-y			+=	ipa_data-v3.5.1.o ipa_data-v4.2.o \
+				ipa_data-v4.5.o

drivers/net/ipa/ipa_data.h

@@ -302,5 +302,6 @@ struct ipa_data {
 
 extern const struct ipa_data ipa_data_v3_5_1;
 extern const struct ipa_data ipa_data_v4_2;
+extern const struct ipa_data ipa_data_v4_5;
 
 #endif /* _IPA_DATA_H_ */

drivers/net/ipa/ipa_main.c

@@ -573,6 +573,10 @@ static const struct of_device_id ipa_match[] = {
 		.compatible	= "qcom,sc7180-ipa",
 		.data		= &ipa_data_v4_2,
 	},
+	{
+		.compatible	= "qcom,sdx55-ipa",
+		.data		= &ipa_data_v4_5,
+	},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ipa_match);

drivers/net/ipa/ipa_mem.h

@@ -58,8 +58,8 @@ enum ipa_mem_id {
 	IPA_MEM_MODEM_PROC_CTX,		/* 2 canaries */
 	IPA_MEM_AP_PROC_CTX,		/* 0 canaries */
 	IPA_MEM_NAT_TABLE,		/* 4 canaries (IPA v4.5 and above) */
-	IPA_MEM_PDN_CONFIG,		/* 2 canaries (IPA v4.0 and above) */
-	IPA_MEM_STATS_QUOTA_MODEM,	/* 2 canaries (IPA v4.0 and above) */
+	IPA_MEM_PDN_CONFIG,		/* 0/2 canaries (IPA v4.0 and above) */
+	IPA_MEM_STATS_QUOTA_MODEM,	/* 2/4 canaries (IPA v4.0 and above) */
 	IPA_MEM_STATS_QUOTA_AP,		/* 0 canaries (IPA v4.0 and above) */
 	IPA_MEM_STATS_TETHERING,	/* 0 canaries (IPA v4.0 and above) */
 	IPA_MEM_STATS_V4_FILTER,	/* 0 canaries (IPA v4.0-v4.2) */
@@ -68,7 +68,7 @@ enum ipa_mem_id {
 	IPA_MEM_STATS_V6_ROUTE,		/* 0 canaries (IPA v4.0-v4.2) */
 	IPA_MEM_STATS_FILTER_ROUTE,	/* 0 canaries (IPA v4.5 and above) */
 	IPA_MEM_STATS_DROP,		/* 0 canaries (IPA v4.0 and above) */
-	IPA_MEM_MODEM,			/* 0 canaries */
+	IPA_MEM_MODEM,			/* 0/2 canaries */
 	IPA_MEM_UC_EVENT_RING,		/* 1 canary */
 	IPA_MEM_COUNT,			/* Number of regions (not an index) */
 };