[PATCH 5.4 26/65] cxgb4: parse TC-U32 key values and masks natively

From: Greg Kroah-Hartman
Date: Tue Jul 07 2020 - 11:33:27 EST

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From: Rahul Lakkireddy <rahul.lakkireddy@xxxxxxxxxxx>

[ Upstream commit 27f78cb245abdb86735529c13b0a579f57829e71 ]

TC-U32 passes all keys values and masks in __be32 format. The parser
already expects this and hence pass the value and masks in __be32
natively to the parser.

Fixes following sparse warnings in several places:
cxgb4_tc_u32.c:57:21: warning: incorrect type in assignment (different base
types)
cxgb4_tc_u32.c:57:21: expected unsigned int [usertype] val
cxgb4_tc_u32.c:57:21: got restricted __be32 [usertype] val
cxgb4_tc_u32_parse.h:48:24: warning: cast to restricted __be32

Fixes: 2e8aad7bf203 ("cxgb4: add parser to translate u32 filters to internal spec")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
.../net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c | 18 +--
.../chelsio/cxgb4/cxgb4_tc_u32_parse.h | 122 ++++++++++++------
2 files changed, 91 insertions(+), 49 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
index 02fc63fa7f256..b3a342561a968 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32.c
@@ -47,7 +47,7 @@ static int fill_match_fields(struct adapter *adap,
bool next_header)
{
unsigned int i, j;
- u32 val, mask;
+ __be32 val, mask;
int off, err;
bool found;

@@ -216,7 +216,7 @@ int cxgb4_config_knode(struct net_device *dev, struct tc_cls_u32_offload *cls)
const struct cxgb4_next_header *next;
bool found = false;
unsigned int i, j;
- u32 val, mask;
+ __be32 val, mask;
int off;

if (t->table[link_uhtid - 1].link_handle) {
@@ -230,10 +230,10 @@ int cxgb4_config_knode(struct net_device *dev, struct tc_cls_u32_offload *cls)

/* Try to find matches that allow jumps to next header. */
for (i = 0; next[i].jump; i++) {
- if (next[i].offoff != cls->knode.sel->offoff ||
- next[i].shift != cls->knode.sel->offshift ||
- next[i].mask != cls->knode.sel->offmask ||
- next[i].offset != cls->knode.sel->off)
+ if (next[i].sel.offoff != cls->knode.sel->offoff ||
+ next[i].sel.offshift != cls->knode.sel->offshift ||
+ next[i].sel.offmask != cls->knode.sel->offmask ||
+ next[i].sel.off != cls->knode.sel->off)
continue;

/* Found a possible candidate. Find a key that
@@ -245,9 +245,9 @@ int cxgb4_config_knode(struct net_device *dev, struct tc_cls_u32_offload *cls)
val = cls->knode.sel->keys[j].val;
mask = cls->knode.sel->keys[j].mask;

- if (next[i].match_off == off &&
- next[i].match_val == val &&
- next[i].match_mask == mask) {
+ if (next[i].key.off == off &&
+ next[i].key.val == val &&
+ next[i].key.mask == mask) {
found = true;
break;
}
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h
index a4b99edcc3399..141085e159e57 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h
@@ -38,12 +38,12 @@
struct cxgb4_match_field {
int off; /* Offset from the beginning of the header to match */
/* Fill the value/mask pair in the spec if matched */
- int (*val)(struct ch_filter_specification *f, u32 val, u32 mask);
+ int (*val)(struct ch_filter_specification *f, __be32 val, __be32 mask);
};

/* IPv4 match fields */
static inline int cxgb4_fill_ipv4_tos(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
f->val.tos = (ntohl(val) >> 16) & 0x000000FF;
f->mask.tos = (ntohl(mask) >> 16) & 0x000000FF;
@@ -52,7 +52,7 @@ static inline int cxgb4_fill_ipv4_tos(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv4_frag(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
u32 mask_val;
u8 frag_val;
@@ -74,7 +74,7 @@ static inline int cxgb4_fill_ipv4_frag(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
f->val.proto = (ntohl(val) >> 16) & 0x000000FF;
f->mask.proto = (ntohl(mask) >> 16) & 0x000000FF;
@@ -83,7 +83,7 @@ static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv4_src_ip(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.fip[0], &val, sizeof(u32));
memcpy(&f->mask.fip[0], &mask, sizeof(u32));
@@ -92,7 +92,7 @@ static inline int cxgb4_fill_ipv4_src_ip(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv4_dst_ip(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.lip[0], &val, sizeof(u32));
memcpy(&f->mask.lip[0], &mask, sizeof(u32));
@@ -111,7 +111,7 @@ static const struct cxgb4_match_field cxgb4_ipv4_fields[] = {

/* IPv6 match fields */
static inline int cxgb4_fill_ipv6_tos(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
f->val.tos = (ntohl(val) >> 20) & 0x000000FF;
f->mask.tos = (ntohl(mask) >> 20) & 0x000000FF;
@@ -120,7 +120,7 @@ static inline int cxgb4_fill_ipv6_tos(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
f->val.proto = (ntohl(val) >> 8) & 0x000000FF;
f->mask.proto = (ntohl(mask) >> 8) & 0x000000FF;
@@ -129,7 +129,7 @@ static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_src_ip0(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.fip[0], &val, sizeof(u32));
memcpy(&f->mask.fip[0], &mask, sizeof(u32));
@@ -138,7 +138,7 @@ static inline int cxgb4_fill_ipv6_src_ip0(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_src_ip1(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.fip[4], &val, sizeof(u32));
memcpy(&f->mask.fip[4], &mask, sizeof(u32));
@@ -147,7 +147,7 @@ static inline int cxgb4_fill_ipv6_src_ip1(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_src_ip2(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.fip[8], &val, sizeof(u32));
memcpy(&f->mask.fip[8], &mask, sizeof(u32));
@@ -156,7 +156,7 @@ static inline int cxgb4_fill_ipv6_src_ip2(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_src_ip3(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.fip[12], &val, sizeof(u32));
memcpy(&f->mask.fip[12], &mask, sizeof(u32));
@@ -165,7 +165,7 @@ static inline int cxgb4_fill_ipv6_src_ip3(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_dst_ip0(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.lip[0], &val, sizeof(u32));
memcpy(&f->mask.lip[0], &mask, sizeof(u32));
@@ -174,7 +174,7 @@ static inline int cxgb4_fill_ipv6_dst_ip0(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_dst_ip1(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.lip[4], &val, sizeof(u32));
memcpy(&f->mask.lip[4], &mask, sizeof(u32));
@@ -183,7 +183,7 @@ static inline int cxgb4_fill_ipv6_dst_ip1(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_dst_ip2(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.lip[8], &val, sizeof(u32));
memcpy(&f->mask.lip[8], &mask, sizeof(u32));
@@ -192,7 +192,7 @@ static inline int cxgb4_fill_ipv6_dst_ip2(struct ch_filter_specification *f,
}

static inline int cxgb4_fill_ipv6_dst_ip3(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
memcpy(&f->val.lip[12], &val, sizeof(u32));
memcpy(&f->mask.lip[12], &mask, sizeof(u32));
@@ -216,7 +216,7 @@ static const struct cxgb4_match_field cxgb4_ipv6_fields[] = {

/* TCP/UDP match */
static inline int cxgb4_fill_l4_ports(struct ch_filter_specification *f,
- u32 val, u32 mask)
+ __be32 val, __be32 mask)
{
f->val.fport = ntohl(val) >> 16;
f->mask.fport = ntohl(mask) >> 16;
@@ -237,19 +237,13 @@ static const struct cxgb4_match_field cxgb4_udp_fields[] = {
};

struct cxgb4_next_header {
- unsigned int offset; /* Offset to next header */
- /* offset, shift, and mask added to offset above
+ /* Offset, shift, and mask added to beginning of the header
* to get to next header. Useful when using a header
* field's value to jump to next header such as IHL field
* in IPv4 header.
*/
- unsigned int offoff;
- u32 shift;
- u32 mask;
- /* match criteria to make this jump */
- unsigned int match_off;
- u32 match_val;
- u32 match_mask;
+ struct tc_u32_sel sel;
+ struct tc_u32_key key;
/* location of jump to make */
const struct cxgb4_match_field *jump;
};
@@ -258,26 +252,74 @@ struct cxgb4_next_header {
* IPv4 header.
*/
static const struct cxgb4_next_header cxgb4_ipv4_jumps[] = {
- { .offset = 0, .offoff = 0, .shift = 6, .mask = 0xF,
- .match_off = 8, .match_val = 0x600, .match_mask = 0xFF00,
- .jump = cxgb4_tcp_fields },
- { .offset = 0, .offoff = 0, .shift = 6, .mask = 0xF,
- .match_off = 8, .match_val = 0x1100, .match_mask = 0xFF00,
- .jump = cxgb4_udp_fields },
- { .jump = NULL }
+ {
+ /* TCP Jump */
+ .sel = {
+ .off = 0,
+ .offoff = 0,
+ .offshift = 6,
+ .offmask = cpu_to_be16(0x0f00),
+ },
+ .key = {
+ .off = 8,
+ .val = cpu_to_be32(0x00060000),
+ .mask = cpu_to_be32(0x00ff0000),
+ },
+ .jump = cxgb4_tcp_fields,
+ },
+ {
+ /* UDP Jump */
+ .sel = {
+ .off = 0,
+ .offoff = 0,
+ .offshift = 6,
+ .offmask = cpu_to_be16(0x0f00),
+ },
+ .key = {
+ .off = 8,
+ .val = cpu_to_be32(0x00110000),
+ .mask = cpu_to_be32(0x00ff0000),
+ },
+ .jump = cxgb4_udp_fields,
+ },
+ { .jump = NULL },
};

/* Accept a rule with a jump directly past the 40 Bytes of IPv6 fixed header
* to get to transport layer header.
*/
static const struct cxgb4_next_header cxgb4_ipv6_jumps[] = {
- { .offset = 0x28, .offoff = 0, .shift = 0, .mask = 0,
- .match_off = 4, .match_val = 0x60000, .match_mask = 0xFF0000,
- .jump = cxgb4_tcp_fields },
- { .offset = 0x28, .offoff = 0, .shift = 0, .mask = 0,
- .match_off = 4, .match_val = 0x110000, .match_mask = 0xFF0000,
- .jump = cxgb4_udp_fields },
- { .jump = NULL }
+ {
+ /* TCP Jump */
+ .sel = {
+ .off = 40,
+ .offoff = 0,
+ .offshift = 0,
+ .offmask = 0,
+ },
+ .key = {
+ .off = 4,
+ .val = cpu_to_be32(0x00000600),
+ .mask = cpu_to_be32(0x0000ff00),
+ },
+ .jump = cxgb4_tcp_fields,
+ },
+ {
+ /* UDP Jump */
+ .sel = {
+ .off = 40,
+ .offoff = 0,
+ .offshift = 0,
+ .offmask = 0,
+ },
+ .key = {
+ .off = 4,
+ .val = cpu_to_be32(0x00001100),
+ .mask = cpu_to_be32(0x0000ff00),
+ },
+ .jump = cxgb4_udp_fields,
+ },
+ { .jump = NULL },
};

struct cxgb4_link {
--
2.25.1

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