msm: ipa: Fix considering prefetch buf size when mapping

IPA HW tries to prefetch 128 Bytes of additional memory when
dealing with filter/routing tables. This can result in overflowing
of memory if we map only the required size. Make changes to
consider prefetch memory when allocating routing/filter tables.

Change-Id: Id72e4df285a4683dddebb18d98bb9c4dd9667eeb
Signed-off-by: Chaitanya Pratapa <[email protected]>

drivers/platform/msm/ipa/ipa_v3/ipa_flt.c

@@ -223,6 +223,9 @@ static int ipa_translate_flt_tbl_to_hw_fmt(enum ipa_ip_type ip,
 			/* only body (no header) */
 			tbl_mem.size = tbl->sz[rlt] -
 				ipahal_get_hw_tbl_hdr_width();
+			/* Add prefetech buf size. */
+			tbl_mem.size +=
+				ipahal_get_hw_prefetch_buf_size();
 			if (ipahal_fltrt_allocate_hw_sys_tbl(&tbl_mem)) {
 				IPAERR("fail to alloc sys tbl of size %d\n",
 					tbl_mem.size);

drivers/platform/msm/ipa/ipa_v3/ipa_rt.c

@@ -170,6 +170,9 @@ static int ipa_translate_rt_tbl_to_hw_fmt(enum ipa_ip_type ip,
 			/* only body (no header) */
 			tbl_mem.size = tbl->sz[rlt] -
 				ipahal_get_hw_tbl_hdr_width();
+			/* Add prefetech buf size. */
+			tbl_mem.size +=
+				ipahal_get_hw_prefetch_buf_size();
 			if (ipahal_fltrt_allocate_hw_sys_tbl(&tbl_mem)) {
 				IPAERR_RL("fail to alloc sys tbl of size %d\n",
 					tbl_mem.size);

drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_fltrt.c

@@ -759,6 +759,7 @@ static int ipa_flt_gen_hw_rule_ipav5_0(
 * @flt_parse_hw_rule: Parse flt rule read from H/W
 * @eq_bitfield: Array of the bit fields of the support equations.
 *	0xFF means the equation is not supported
+* @prefetech_buf_size: Prefetch buf size;
 */
 struct ipahal_fltrt_obj {
 	bool support_hash;
@@ -788,6 +789,7 @@ struct ipahal_fltrt_obj {
 	int(*rt_parse_hw_rule)(u8 *addr, struct ipahal_rt_rule_entry *rule);
 	int(*flt_parse_hw_rule)(u8 *addr, struct ipahal_flt_rule_entry *rule);
 	u8 eq_bitfield[IPA_EQ_MAX];
+	u32 prefetech_buf_size;
 };
 
 /*
@@ -842,6 +844,7 @@ static struct ipahal_fltrt_obj ipahal_fltrt_objs[IPA_HW_MAX] = {
 			[IPA_IS_FRAG]			= 15,
 			[IPA_IS_PURE_ACK]		= 0xFF,
 		},
+		IPA3_0_HW_RULE_PREFETCH_BUF_SIZE,
 	},
 
 	/* IPAv4 */
@@ -887,6 +890,7 @@ static struct ipahal_fltrt_obj ipahal_fltrt_objs[IPA_HW_MAX] = {
 			[IPA_IS_FRAG]			= 15,
 			[IPA_IS_PURE_ACK]		= 0xFF,
 		},
+		IPA3_0_HW_RULE_PREFETCH_BUF_SIZE,
 	},
 
 	/* IPAv4.2 */
@@ -932,6 +936,7 @@ static struct ipahal_fltrt_obj ipahal_fltrt_objs[IPA_HW_MAX] = {
 			[IPA_IS_FRAG]			= 15,
 			[IPA_IS_PURE_ACK]		= 0xFF,
 		},
+		IPA3_0_HW_RULE_PREFETCH_BUF_SIZE,
 	},
 
 	/* IPAv4.5 */
@@ -977,51 +982,53 @@ static struct ipahal_fltrt_obj ipahal_fltrt_objs[IPA_HW_MAX] = {
 			[IPA_IS_FRAG]			= 15,
 			[IPA_IS_PURE_ACK]		= 0,
 		},
+		IPA3_0_HW_RULE_PREFETCH_BUF_SIZE,
 	},
 
 	/* IPAv5 */
 	[IPA_HW_v5_0] = {
-			true,
-			IPA3_0_HW_TBL_WIDTH,
-			IPA3_0_HW_TBL_SYSADDR_ALIGNMENT,
-			IPA3_0_HW_TBL_LCLADDR_ALIGNMENT,
-			IPA3_0_HW_TBL_BLK_SIZE_ALIGNMENT,
-			IPA3_0_HW_RULE_START_ALIGNMENT,
-			IPA3_0_HW_TBL_HDR_WIDTH,
-			IPA3_0_HW_TBL_ADDR_MASK,
-			IPA5_0_RULE_MAX_PRIORITY,
-			IPA5_0_RULE_MIN_PRIORITY,
-			IPA3_0_LOW_RULE_ID,
-			IPA3_0_RULE_ID_BIT_LEN,
-			IPA3_0_HW_RULE_BUF_SIZE,
-			ipa_write_64,
-			ipa_fltrt_create_flt_bitmap_v5_0,
-			ipa_fltrt_create_tbl_addr,
-			ipa_fltrt_parse_tbl_addr,
-			ipa_rt_gen_hw_rule_ipav5_0,
-			ipa_flt_gen_hw_rule_ipav5_0,
-			ipa_flt_generate_eq,
-			ipa_rt_parse_hw_rule_ipav5_0,
-			ipa_flt_parse_hw_rule_ipav5_0,
-			{
-				[IPA_TOS_EQ] = 0xFF,
-				[IPA_PROTOCOL_EQ] = 1,
-				[IPA_TC_EQ] = 2,
-				[IPA_OFFSET_MEQ128_0] = 3,
-				[IPA_OFFSET_MEQ128_1] = 4,
-				[IPA_OFFSET_MEQ32_0] = 5,
-				[IPA_OFFSET_MEQ32_1] = 6,
-				[IPA_IHL_OFFSET_MEQ32_0] = 7,
-				[IPA_IHL_OFFSET_MEQ32_1] = 8,
-				[IPA_METADATA_COMPARE] = 9,
-				[IPA_IHL_OFFSET_RANGE16_0] = 10,
-				[IPA_IHL_OFFSET_RANGE16_1] = 11,
-				[IPA_IHL_OFFSET_EQ_32] = 12,
-				[IPA_IHL_OFFSET_EQ_16] = 13,
-				[IPA_FL_EQ] = 14,
-				[IPA_IS_FRAG] = 15,
-				[IPA_IS_PURE_ACK] = 0,
-			},
+		true,
+		IPA3_0_HW_TBL_WIDTH,
+		IPA3_0_HW_TBL_SYSADDR_ALIGNMENT,
+		IPA3_0_HW_TBL_LCLADDR_ALIGNMENT,
+		IPA3_0_HW_TBL_BLK_SIZE_ALIGNMENT,
+		IPA3_0_HW_RULE_START_ALIGNMENT,
+		IPA3_0_HW_TBL_HDR_WIDTH,
+		IPA3_0_HW_TBL_ADDR_MASK,
+		IPA5_0_RULE_MAX_PRIORITY,
+		IPA5_0_RULE_MIN_PRIORITY,
+		IPA3_0_LOW_RULE_ID,
+		IPA3_0_RULE_ID_BIT_LEN,
+		IPA3_0_HW_RULE_BUF_SIZE,
+		ipa_write_64,
+		ipa_fltrt_create_flt_bitmap_v5_0,
+		ipa_fltrt_create_tbl_addr,
+		ipa_fltrt_parse_tbl_addr,
+		ipa_rt_gen_hw_rule_ipav5_0,
+		ipa_flt_gen_hw_rule_ipav5_0,
+		ipa_flt_generate_eq,
+		ipa_rt_parse_hw_rule_ipav5_0,
+		ipa_flt_parse_hw_rule_ipav5_0,
+		{
+			[IPA_TOS_EQ] = 0xFF,
+			[IPA_PROTOCOL_EQ] = 1,
+			[IPA_TC_EQ] = 2,
+			[IPA_OFFSET_MEQ128_0] = 3,
+			[IPA_OFFSET_MEQ128_1] = 4,
+			[IPA_OFFSET_MEQ32_0] = 5,
+			[IPA_OFFSET_MEQ32_1] = 6,
+			[IPA_IHL_OFFSET_MEQ32_0] = 7,
+			[IPA_IHL_OFFSET_MEQ32_1] = 8,
+			[IPA_METADATA_COMPARE] = 9,
+			[IPA_IHL_OFFSET_RANGE16_0] = 10,
+			[IPA_IHL_OFFSET_RANGE16_1] = 11,
+			[IPA_IHL_OFFSET_EQ_32] = 12,
+			[IPA_IHL_OFFSET_EQ_16] = 13,
+			[IPA_FL_EQ] = 14,
+			[IPA_IS_FRAG] = 15,
+			[IPA_IS_PURE_ACK] = 0,
+		},
+		IPA3_0_HW_RULE_PREFETCH_BUF_SIZE,
 	},
 };
 
@@ -4109,6 +4116,12 @@ u32 ipahal_get_lcl_tbl_addr_alignment(void)
 	return ipahal_fltrt_objs[ipahal_ctx->hw_type].lcladdr_alignment;
 }
 
+/* Get the H/W (flt/rt) prefetch buf size */
+u32 ipahal_get_hw_prefetch_buf_size(void)
+{
+	return ipahal_fltrt_objs[ipahal_ctx->hw_type].prefetech_buf_size;
+}
+
 /*
  * Rule priority is used to distinguish rules order
  * at the integrated table consisting from hashable and

drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_fltrt.h

@@ -143,6 +143,9 @@ u32 ipahal_get_hw_tbl_hdr_width(void);
  */
 u32 ipahal_get_lcl_tbl_addr_alignment(void);
 
+/* Get the H/W (flt/rt) prefetch buf size */
+u32 ipahal_get_hw_prefetch_buf_size(void);
+
 /*
  * Rule priority is used to distinguish rules order
  * at the integrated table consisting from hashable and

drivers/platform/msm/ipa/ipa_v3/ipahal/ipahal_fltrt_i.h

@@ -44,6 +44,7 @@ enum ipa_fltrt_equations {
 #define IPA3_0_HW_TBL_ADDR_MASK (127)
 #define IPA3_0_HW_RULE_BUF_SIZE (256)
 #define IPA3_0_HW_RULE_START_ALIGNMENT (7)
+#define IPA3_0_HW_RULE_PREFETCH_BUF_SIZE (128)
 
 
 /*