[RFC PATCH 02/17] net: ipa: revert to IPA_TABLE_ENTRY_SIZE for 32-bit IPA support

[Sireesh Kodali <sireeshkodali1@gmail.com>]

From: Vladimir Lypak <vladimir.lypak@gmail.com>

IPA v2.x is 32 bit. Having an IPA_TABLE_ENTRY size makes it easier to
deal with supporting both 32 bit and 64 bit IPA versions

Signed-off-by: Vladimir Lypak <vladimir.lypak@gmail.com>
Signed-off-by: Sireesh Kodali <sireeshkodali1@gmail.com>
---
 drivers/net/ipa/ipa_qmi.c   | 10 ++++++----
 drivers/net/ipa/ipa_table.c | 29 +++++++++++++----------------
 drivers/net/ipa/ipa_table.h |  4 ++++
 3 files changed, 23 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ipa/ipa_qmi.c b/drivers/net/ipa/ipa_qmi.c
index 90f3aec55b36..7e2fe701cc4d 100644
--- a/drivers/net/ipa/ipa_qmi.c
+++ b/drivers/net/ipa/ipa_qmi.c
@@ -308,12 +308,12 @@ init_modem_driver_req(struct ipa_qmi *ipa_qmi)
 	mem = ipa_mem_find(ipa, IPA_MEM_V4_ROUTE);
 	req.v4_route_tbl_info_valid = 1;
 	req.v4_route_tbl_info.start = ipa->mem_offset + mem->offset;
-	req.v4_route_tbl_info.count = mem->size / sizeof(__le64);
+	req.v4_route_tbl_info.count = mem->size / IPA_TABLE_ENTRY_SIZE(ipa->version);
 
 	mem = ipa_mem_find(ipa, IPA_MEM_V6_ROUTE);
 	req.v6_route_tbl_info_valid = 1;
 	req.v6_route_tbl_info.start = ipa->mem_offset + mem->offset;
-	req.v6_route_tbl_info.count = mem->size / sizeof(__le64);
+	req.v6_route_tbl_info.count = mem->size / IPA_TABLE_ENTRY_SIZE(ipa->version);
 
 	mem = ipa_mem_find(ipa, IPA_MEM_V4_FILTER);
 	req.v4_filter_tbl_start_valid = 1;
@@ -352,7 +352,8 @@ init_modem_driver_req(struct ipa_qmi *ipa_qmi)
 		req.v4_hash_route_tbl_info_valid = 1;
 		req.v4_hash_route_tbl_info.start =
 				ipa->mem_offset + mem->offset;
-		req.v4_hash_route_tbl_info.count = mem->size / sizeof(__le64);
+		req.v4_hash_route_tbl_info.count =
+				mem->size / IPA_TABLE_ENTRY_SIZE(ipa->version);
 	}
 
 	mem = ipa_mem_find(ipa, IPA_MEM_V6_ROUTE_HASHED);
@@ -360,7 +361,8 @@ init_modem_driver_req(struct ipa_qmi *ipa_qmi)
 		req.v6_hash_route_tbl_info_valid = 1;
 		req.v6_hash_route_tbl_info.start =
 			ipa->mem_offset + mem->offset;
-		req.v6_hash_route_tbl_info.count = mem->size / sizeof(__le64);
+		req.v6_hash_route_tbl_info.count =
+				mem->size / IPA_TABLE_ENTRY_SIZE(ipa->version);
 	}
 
 	mem = ipa_mem_find(ipa, IPA_MEM_V4_FILTER_HASHED);
diff --git a/drivers/net/ipa/ipa_table.c b/drivers/net/ipa/ipa_table.c
index 1da334f54944..96c467c80a2e 100644
--- a/drivers/net/ipa/ipa_table.c
+++ b/drivers/net/ipa/ipa_table.c
@@ -118,7 +118,8 @@
  * 32-bit all-zero rule list terminator.  The "zero rule" is simply an
  * all-zero rule followed by the list terminator.
  */
-#define IPA_ZERO_RULE_SIZE		(2 * sizeof(__le32))
+#define IPA_ZERO_RULE_SIZE(version) \
+	 (IPA_IS_64BIT(version) ? 2 * sizeof(__le32) : sizeof(__le32))
 
 /* Check things that can be validated at build time. */
 static void ipa_table_validate_build(void)
@@ -132,12 +133,6 @@ static void ipa_table_validate_build(void)
 	 */
 	BUILD_BUG_ON(sizeof(dma_addr_t) > sizeof(__le64));
 
-	/* A "zero rule" is used to represent no filtering or no routing.
-	 * It is a 64-bit block of zeroed memory.  Code in ipa_table_init()
-	 * assumes that it can be written using a pointer to __le64.
-	 */
-	BUILD_BUG_ON(IPA_ZERO_RULE_SIZE != sizeof(__le64));
-
 	/* Impose a practical limit on the number of routes */
 	BUILD_BUG_ON(IPA_ROUTE_COUNT_MAX > 32);
 	/* The modem must be allotted at least one route table entry */
@@ -236,7 +231,7 @@ static dma_addr_t ipa_table_addr(struct ipa *ipa, bool filter_mask, u16 count)
 	/* Skip over the zero rule and possibly the filter mask */
 	skip = filter_mask ? 1 : 2;
 
-	return ipa->table_addr + skip * sizeof(*ipa->table_virt);
+	return ipa->table_addr + skip * IPA_TABLE_ENTRY_SIZE(ipa->version);
 }
 
 static void ipa_table_reset_add(struct gsi_trans *trans, bool filter,
@@ -255,8 +250,8 @@ static void ipa_table_reset_add(struct gsi_trans *trans, bool filter,
 	if (filter)
 		first++;	/* skip over bitmap */
 
-	offset = mem->offset + first * sizeof(__le64);
-	size = count * sizeof(__le64);
+	offset = mem->offset + first * IPA_TABLE_ENTRY_SIZE(ipa->version);
+	size = count * IPA_TABLE_ENTRY_SIZE(ipa->version);
 	addr = ipa_table_addr(ipa, false, count);
 
 	ipa_cmd_dma_shared_mem_add(trans, offset, size, addr, true);
@@ -434,11 +429,11 @@ static void ipa_table_init_add(struct gsi_trans *trans, bool filter,
 		count = 1 + hweight32(ipa->filter_map);
 		hash_count = hash_mem->size ? count : 0;
 	} else {
-		count = mem->size / sizeof(__le64);
-		hash_count = hash_mem->size / sizeof(__le64);
+		count = mem->size / IPA_TABLE_ENTRY_SIZE(ipa->version);
+		hash_count = hash_mem->size / IPA_TABLE_ENTRY_SIZE(ipa->version);
 	}
-	size = count * sizeof(__le64);
-	hash_size = hash_count * sizeof(__le64);
+	size = count * IPA_TABLE_ENTRY_SIZE(ipa->version);
+	hash_size = hash_count * IPA_TABLE_ENTRY_SIZE(ipa->version);
 
 	addr = ipa_table_addr(ipa, filter, count);
 	hash_addr = ipa_table_addr(ipa, filter, hash_count);
@@ -621,7 +616,8 @@ int ipa_table_init(struct ipa *ipa)
 	 * by dma_alloc_coherent() is guaranteed to be a power-of-2 number
 	 * of pages, which satisfies the rule alignment requirement.
 	 */
-	size = IPA_ZERO_RULE_SIZE + (1 + count) * sizeof(__le64);
+	size = IPA_ZERO_RULE_SIZE(ipa->version) +
+	       (1 + count) * IPA_TABLE_ENTRY_SIZE(ipa->version);
 	virt = dma_alloc_coherent(dev, size, &addr, GFP_KERNEL);
 	if (!virt)
 		return -ENOMEM;
@@ -653,7 +649,8 @@ void ipa_table_exit(struct ipa *ipa)
 	struct device *dev = &ipa->pdev->dev;
 	size_t size;
 
-	size = IPA_ZERO_RULE_SIZE + (1 + count) * sizeof(__le64);
+	size = IPA_ZERO_RULE_SIZE(ipa->version) +
+	       (1 + count) * IPA_TABLE_ENTRY_SIZE(ipa->version);
 
 	dma_free_coherent(dev, size, ipa->table_virt, ipa->table_addr);
 	ipa->table_addr = 0;
diff --git a/drivers/net/ipa/ipa_table.h b/drivers/net/ipa/ipa_table.h
index b6a9a0d79d68..78a168ce6558 100644
--- a/drivers/net/ipa/ipa_table.h
+++ b/drivers/net/ipa/ipa_table.h
@@ -10,6 +10,10 @@
 
 struct ipa;
 
+/* The size of a filter or route table entry */
+#define IPA_TABLE_ENTRY_SIZE(version)	\
+	(IPA_IS_64BIT(version) ? sizeof(__le64) : sizeof(__le32))
+
 /* The maximum number of filter table entries (IPv4, IPv6; hashed or not) */
 #define IPA_FILTER_COUNT_MAX	14
 
-- 
2.33.0