drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.c
Extension
.c
Size
11172 bytes
Lines
303
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#define CREATE_TRACE_POINTS

#include "fs_tracepoint.h"
#include <linux/stringify.h>

#define DECLARE_MASK_VAL(type, name) struct {type m; type v; } name
#define MASK_VAL(type, spec, name, mask, val, fld)	\
		DECLARE_MASK_VAL(type, name) =		\
			{.m = MLX5_GET(spec, mask, fld),\
			 .v = MLX5_GET(spec, val, fld)}
#define MASK_VAL_BE(type, spec, name, mask, val, fld)	\
		    DECLARE_MASK_VAL(type, name) =	\
			{.m = MLX5_GET_BE(type, spec, mask, fld),\
			 .v = MLX5_GET_BE(type, spec, val, fld)}
#define GET_MASKED_VAL(name) (name.m & name.v)

#define GET_MASK_VAL(name, type, mask, val, fld)	\
		(name.m = MLX5_GET(type, mask, fld),	\
		 name.v = MLX5_GET(type, val, fld),	\
		 name.m & name.v)
#define PRINT_MASKED_VAL(name, p, format) {		\
	if (name.m)			\
		trace_seq_printf(p, __stringify(name) "=" format " ", name.v); \
	}
#define PRINT_MASKED_VALP(name, cast, p, format) {	\
	if (name.m)			\
		trace_seq_printf(p, __stringify(name) "=" format " ",	       \
				 (cast)&name.v);\
	}

static void print_lyr_2_4_hdrs(struct trace_seq *p,
			       const u32 *mask, const u32 *value)
{
#define MASK_VAL_L2(type, name, fld) \
	MASK_VAL(type, fte_match_set_lyr_2_4, name, mask, value, fld)
	DECLARE_MASK_VAL(u64, smac) = {
		.m = MLX5_GET(fte_match_set_lyr_2_4, mask, smac_47_16) << 16 |
		     MLX5_GET(fte_match_set_lyr_2_4, mask, smac_15_0),
		.v = MLX5_GET(fte_match_set_lyr_2_4, value, smac_47_16) << 16 |
		     MLX5_GET(fte_match_set_lyr_2_4, value, smac_15_0)};
	DECLARE_MASK_VAL(u64, dmac) = {
		.m = MLX5_GET(fte_match_set_lyr_2_4, mask, dmac_47_16) << 16 |
		     MLX5_GET(fte_match_set_lyr_2_4, mask, dmac_15_0),
		.v = MLX5_GET(fte_match_set_lyr_2_4, value, dmac_47_16) << 16 |
		     MLX5_GET(fte_match_set_lyr_2_4, value, dmac_15_0)};
	MASK_VAL_L2(u16, ethertype, ethertype);
	MASK_VAL_L2(u8, ip_version, ip_version);

	PRINT_MASKED_VALP(smac, u8 *, p, "%pM");
	PRINT_MASKED_VALP(dmac, u8 *, p, "%pM");
	PRINT_MASKED_VAL(ethertype, p, "%04x");

	if ((ethertype.m == 0xffff && ethertype.v == ETH_P_IP) ||
	    (ip_version.m == 0xf && ip_version.v == 4)) {
#define MASK_VAL_L2_BE(type, name, fld) \
	MASK_VAL_BE(type, fte_match_set_lyr_2_4, name, mask, value, fld)
		MASK_VAL_L2_BE(u32, src_ipv4,
			       src_ipv4_src_ipv6.ipv4_layout.ipv4);
		MASK_VAL_L2_BE(u32, dst_ipv4,
			       dst_ipv4_dst_ipv6.ipv4_layout.ipv4);

		PRINT_MASKED_VALP(src_ipv4, typeof(&src_ipv4.v), p,
				  "%pI4");
		PRINT_MASKED_VALP(dst_ipv4, typeof(&dst_ipv4.v), p,
				  "%pI4");
	} else if ((ethertype.m == 0xffff && ethertype.v == ETH_P_IPV6) ||
		   (ip_version.m == 0xf && ip_version.v == 6)) {
		static const struct in6_addr full_ones = {
			.in6_u.u6_addr32 = {__constant_htonl(0xffffffff),
					    __constant_htonl(0xffffffff),
					    __constant_htonl(0xffffffff),
					    __constant_htonl(0xffffffff)},
		};
		DECLARE_MASK_VAL(struct in6_addr, src_ipv6);
		DECLARE_MASK_VAL(struct in6_addr, dst_ipv6);

		memcpy(src_ipv6.m.in6_u.u6_addr8,
		       MLX5_ADDR_OF(fte_match_set_lyr_2_4, mask,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       sizeof(src_ipv6.m));
		memcpy(dst_ipv6.m.in6_u.u6_addr8,
		       MLX5_ADDR_OF(fte_match_set_lyr_2_4, mask,
				    dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
		       sizeof(dst_ipv6.m));
		memcpy(src_ipv6.v.in6_u.u6_addr8,
		       MLX5_ADDR_OF(fte_match_set_lyr_2_4, value,
				    src_ipv4_src_ipv6.ipv6_layout.ipv6),
		       sizeof(src_ipv6.v));
		memcpy(dst_ipv6.v.in6_u.u6_addr8,
		       MLX5_ADDR_OF(fte_match_set_lyr_2_4, value,

Annotation

Implementation Notes