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Date: Mon, 20 Sep 2021 08:37:56 +0530
From: Sireesh Kodali <sireeshkodali1@...il.com>
To: phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org, elder@...nel.org
Cc: Vladimir Lypak <vladimir.lypak@...il.com>,
Sireesh Kodali <sireeshkodali1@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Subject: [RFC PATCH 02/17] net: ipa: revert to IPA_TABLE_ENTRY_SIZE for 32-bit IPA support
From: Vladimir Lypak <vladimir.lypak@...il.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@...il.com>
Signed-off-by: Sireesh Kodali <sireeshkodali1@...il.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
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