From: Alex Elder elder@linaro.org
[ Upstream commit 4ea29143ebe6c453f5fddc80ffe4ed046f44aa3a ]
Entries in an IPA route or filter table are 64-bit little-endian addresses, each of which refers to a routing or filtering rule.
The format of these table slots are fixed, but IPA_TABLE_ENTRY_SIZE is used to define their size. This symbol doesn't really add value, and I think it unnecessarily obscures what a table entry *is*.
So get rid of IPA_TABLE_ENTRY_SIZE, and just use sizeof(__le64) in its place throughout the code.
Update the comments in "ipa_table.c" to provide a little better explanation of these table slots.
Signed-off-by: Alex Elder elder@linaro.org Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: cf412ec33325 ("net: ipa: properly limit modem routing table use") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ipa/ipa_cmd.c | 2 +- drivers/net/ipa/ipa_qmi.c | 10 +++---- drivers/net/ipa/ipa_table.c | 59 +++++++++++++++++++++---------------- drivers/net/ipa/ipa_table.h | 3 -- 4 files changed, 39 insertions(+), 35 deletions(-)
diff --git a/drivers/net/ipa/ipa_cmd.c b/drivers/net/ipa/ipa_cmd.c index a47378b7d9b2..dc94ce035655 100644 --- a/drivers/net/ipa/ipa_cmd.c +++ b/drivers/net/ipa/ipa_cmd.c @@ -154,7 +154,7 @@ static void ipa_cmd_validate_build(void) * of entries, as and IPv4 and IPv6 route tables have the same number * of entries. */ -#define TABLE_SIZE (TABLE_COUNT_MAX * IPA_TABLE_ENTRY_SIZE) +#define TABLE_SIZE (TABLE_COUNT_MAX * sizeof(__le64)) #define TABLE_COUNT_MAX max_t(u32, IPA_ROUTE_COUNT_MAX, IPA_FILTER_COUNT_MAX) BUILD_BUG_ON(TABLE_SIZE > field_max(IP_FLTRT_FLAGS_HASH_SIZE_FMASK)); BUILD_BUG_ON(TABLE_SIZE > field_max(IP_FLTRT_FLAGS_NHASH_SIZE_FMASK)); diff --git a/drivers/net/ipa/ipa_qmi.c b/drivers/net/ipa/ipa_qmi.c index 1a87a49538c5..fea61657867e 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[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 / IPA_TABLE_ENTRY_SIZE; + req.v4_route_tbl_info.count = mem->size / sizeof(__le64);
mem = &ipa->mem[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 / IPA_TABLE_ENTRY_SIZE; + req.v6_route_tbl_info.count = mem->size / sizeof(__le64);
mem = &ipa->mem[IPA_MEM_V4_FILTER]; req.v4_filter_tbl_start_valid = 1; @@ -352,8 +352,7 @@ 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 / IPA_TABLE_ENTRY_SIZE; + req.v4_hash_route_tbl_info.count = mem->size / sizeof(__le64); }
mem = &ipa->mem[IPA_MEM_V6_ROUTE_HASHED]; @@ -361,8 +360,7 @@ 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 / IPA_TABLE_ENTRY_SIZE; + req.v6_hash_route_tbl_info.count = mem->size / sizeof(__le64); }
mem = &ipa->mem[IPA_MEM_V4_FILTER_HASHED]; diff --git a/drivers/net/ipa/ipa_table.c b/drivers/net/ipa/ipa_table.c index 087bcae29cc7..bada98d7360c 100644 --- a/drivers/net/ipa/ipa_table.c +++ b/drivers/net/ipa/ipa_table.c @@ -27,28 +27,38 @@ /** * DOC: IPA Filter and Route Tables * - * The IPA has tables defined in its local shared memory that define filter - * and routing rules. Each entry in these tables contains a 64-bit DMA - * address that refers to DRAM (system memory) containing a rule definition. + * The IPA has tables defined in its local (IPA-resident) memory that define + * filter and routing rules. An entry in either of these tables is a little + * endian 64-bit "slot" that holds the address of a rule definition. (The + * size of these slots is 64 bits regardless of the host DMA address size.) + * + * Separate tables (both filter and route) used for IPv4 and IPv6. There + * are normally another set of "hashed" filter and route tables, which are + * used with a hash of message metadata. Hashed operation is not supported + * by all IPA hardware (IPA v4.2 doesn't support hashed tables). + * + * Rules can be in local memory or in DRAM (system memory). The offset of + * an object (such as a route or filter table) in IPA-resident memory must + * 128-byte aligned. An object in system memory (such as a route or filter + * rule) must be at an 8-byte aligned address. We currently only place + * route or filter rules in system memory. + * * A rule consists of a contiguous block of 32-bit values terminated with * 32 zero bits. A special "zero entry" rule consisting of 64 zero bits * represents "no filtering" or "no routing," and is the reset value for - * filter or route table rules. Separate tables (both filter and route) - * used for IPv4 and IPv6. Additionally, there can be hashed filter or - * route tables, which are used when a hash of message metadata matches. - * Hashed operation is not supported by all IPA hardware. + * filter or route table rules. * * Each filter rule is associated with an AP or modem TX endpoint, though - * not all TX endpoints support filtering. The first 64-bit entry in a + * not all TX endpoints support filtering. The first 64-bit slot in a * filter table is a bitmap indicating which endpoints have entries in * the table. The low-order bit (bit 0) in this bitmap represents a * special global filter, which applies to all traffic. This is not * used in the current code. Bit 1, if set, indicates that there is an - * entry (i.e. a DMA address referring to a rule) for endpoint 0 in the - * table. Bit 2, if set, indicates there is an entry for endpoint 1, - * and so on. Space is set aside in IPA local memory to hold as many - * filter table entries as might be required, but typically they are not - * all used. + * entry (i.e. slot containing a system address referring to a rule) for + * endpoint 0 in the table. Bit 3, if set, indicates there is an entry + * for endpoint 2, and so on. Space is set aside in IPA local memory to + * hold as many filter table entries as might be required, but typically + * they are not all used. * * The AP initializes all entries in a filter table to refer to a "zero" * entry. Once initialized the modem and AP update the entries for @@ -122,8 +132,7 @@ static void ipa_table_validate_build(void) * code in ipa_table_init() uses a pointer to __le64 to * initialize tables. */ - BUILD_BUG_ON(sizeof(dma_addr_t) > IPA_TABLE_ENTRY_SIZE); - BUILD_BUG_ON(sizeof(__le64) != IPA_TABLE_ENTRY_SIZE); + 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() @@ -154,7 +163,7 @@ ipa_table_valid_one(struct ipa *ipa, bool route, bool ipv6, bool hashed) else mem = hashed ? &ipa->mem[IPA_MEM_V4_ROUTE_HASHED] : &ipa->mem[IPA_MEM_V4_ROUTE]; - size = IPA_ROUTE_COUNT_MAX * IPA_TABLE_ENTRY_SIZE; + size = IPA_ROUTE_COUNT_MAX * sizeof(__le64); } else { if (ipv6) mem = hashed ? &ipa->mem[IPA_MEM_V6_FILTER_HASHED] @@ -162,7 +171,7 @@ ipa_table_valid_one(struct ipa *ipa, bool route, bool ipv6, bool hashed) else mem = hashed ? &ipa->mem[IPA_MEM_V4_FILTER_HASHED] : &ipa->mem[IPA_MEM_V4_FILTER]; - size = (1 + IPA_FILTER_COUNT_MAX) * IPA_TABLE_ENTRY_SIZE; + size = (1 + IPA_FILTER_COUNT_MAX) * sizeof(__le64); }
if (!ipa_cmd_table_valid(ipa, mem, route, ipv6, hashed)) @@ -261,8 +270,8 @@ static void ipa_table_reset_add(struct gsi_trans *trans, bool filter, if (filter) first++; /* skip over bitmap */
- offset = mem->offset + first * IPA_TABLE_ENTRY_SIZE; - size = count * IPA_TABLE_ENTRY_SIZE; + offset = mem->offset + first * sizeof(__le64); + size = count * sizeof(__le64); addr = ipa_table_addr(ipa, false, count);
ipa_cmd_dma_shared_mem_add(trans, offset, size, addr, true); @@ -446,11 +455,11 @@ 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 / IPA_TABLE_ENTRY_SIZE; - hash_count = hash_mem->size / IPA_TABLE_ENTRY_SIZE; + count = mem->size / sizeof(__le64); + hash_count = hash_mem->size / sizeof(__le64); } - size = count * IPA_TABLE_ENTRY_SIZE; - hash_size = hash_count * IPA_TABLE_ENTRY_SIZE; + size = count * sizeof(__le64); + hash_size = hash_count * sizeof(__le64);
addr = ipa_table_addr(ipa, filter, count); hash_addr = ipa_table_addr(ipa, filter, hash_count); @@ -659,7 +668,7 @@ 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) * IPA_TABLE_ENTRY_SIZE; + size = IPA_ZERO_RULE_SIZE + (1 + count) * sizeof(__le64); virt = dma_alloc_coherent(dev, size, &addr, GFP_KERNEL); if (!virt) return -ENOMEM; @@ -691,7 +700,7 @@ void ipa_table_exit(struct ipa *ipa) struct device *dev = &ipa->pdev->dev; size_t size;
- size = IPA_ZERO_RULE_SIZE + (1 + count) * IPA_TABLE_ENTRY_SIZE; + size = IPA_ZERO_RULE_SIZE + (1 + count) * sizeof(__le64);
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 78038d14fcea..dc9ff21dbdfb 100644 --- a/drivers/net/ipa/ipa_table.h +++ b/drivers/net/ipa/ipa_table.h @@ -10,9 +10,6 @@
struct ipa;
-/* The size of a filter or route table entry */ -#define IPA_TABLE_ENTRY_SIZE sizeof(__le64) /* Holds a physical address */ - /* The maximum number of filter table entries (IPv4, IPv6; hashed or not) */ #define IPA_FILTER_COUNT_MAX 14