drivers/net/ethernet/sfc/mcdi_filters.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/sfc/mcdi_filters.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/sfc/mcdi_filters.c
Extension
.c
Size
69223 bytes
Lines
2304
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

switch (encap_type & EFX_ENCAP_TYPES_MASK) {
		case EFX_ENCAP_TYPE_VXLAN:
			vni_type = MC_CMD_FILTER_OP_EXT_IN_VNI_TYPE_VXLAN;
			fallthrough;
		case EFX_ENCAP_TYPE_GENEVE:
			COPY_VALUE(ether_type, ETHER_TYPE);
			outer_ip_proto = IPPROTO_UDP;
			COPY_VALUE(outer_ip_proto, IP_PROTO);
			/*
			 * We always need to set the type field, even
			 * though we're not matching on the TNI.
			 */
			MCDI_POPULATE_DWORD_1(inbuf,
				FILTER_OP_EXT_IN_VNI_OR_VSID,
				FILTER_OP_EXT_IN_VNI_TYPE,
				vni_type);
			break;
		case EFX_ENCAP_TYPE_NVGRE:
			COPY_VALUE(ether_type, ETHER_TYPE);
			outer_ip_proto = IPPROTO_GRE;
			COPY_VALUE(outer_ip_proto, IP_PROTO);
			break;
		default:
			WARN_ON(1);
		}

		uc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_IFRM_UNKNOWN_UCAST_DST_LBN;
		mc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_IFRM_UNKNOWN_MCAST_DST_LBN;
	} else {
		uc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_UNKNOWN_UCAST_DST_LBN;
		mc_match = MC_CMD_FILTER_OP_EXT_IN_MATCH_UNKNOWN_MCAST_DST_LBN;
	}

	if (spec->match_flags & EFX_FILTER_MATCH_LOC_MAC_IG)
		match_fields |=
			is_multicast_ether_addr(spec->loc_mac) ?
			1 << mc_match :
			1 << uc_match;
	COPY_FIELD(REM_HOST, rem_host, SRC_IP);
	COPY_FIELD(LOC_HOST, loc_host, DST_IP);
	COPY_FIELD(REM_MAC, rem_mac, SRC_MAC);
	COPY_FIELD(REM_PORT, rem_port, SRC_PORT);
	COPY_FIELD(LOC_MAC, loc_mac, DST_MAC);
	COPY_FIELD(LOC_PORT, loc_port, DST_PORT);
	COPY_FIELD(ETHER_TYPE, ether_type, ETHER_TYPE);
	COPY_FIELD(INNER_VID, inner_vid, INNER_VLAN);
	COPY_FIELD(OUTER_VID, outer_vid, OUTER_VLAN);
	COPY_FIELD(IP_PROTO, ip_proto, IP_PROTO);
#undef COPY_FIELD
#undef COPY_VALUE
	MCDI_SET_DWORD(inbuf, FILTER_OP_IN_MATCH_FIELDS,
		       match_fields);
}

static void efx_mcdi_filter_push_prep(struct efx_nic *efx,
				      const struct efx_filter_spec *spec,
				      efx_dword_t *inbuf, u64 handle,
				      struct efx_rss_context_priv *ctx,
				      bool replacing)
{
	u32 flags = spec->flags;

	memset(inbuf, 0, MC_CMD_FILTER_OP_EXT_IN_LEN);

	/* If RSS filter, caller better have given us an RSS context */
	if (flags & EFX_FILTER_FLAG_RX_RSS) {
		/*
		 * We don't have the ability to return an error, so we'll just
		 * log a warning and disable RSS for the filter.
		 */
		if (WARN_ON_ONCE(!ctx))
			flags &= ~EFX_FILTER_FLAG_RX_RSS;
		else if (WARN_ON_ONCE(ctx->context_id == EFX_MCDI_RSS_CONTEXT_INVALID))
			flags &= ~EFX_FILTER_FLAG_RX_RSS;
	}

	if (replacing) {
		MCDI_SET_DWORD(inbuf, FILTER_OP_IN_OP,
			       MC_CMD_FILTER_OP_IN_OP_REPLACE);
		MCDI_SET_QWORD(inbuf, FILTER_OP_IN_HANDLE, handle);
	} else {
		efx_mcdi_filter_push_prep_set_match_fields(efx, spec, inbuf);
	}

	if (flags & EFX_FILTER_FLAG_VPORT_ID)
		MCDI_SET_DWORD(inbuf, FILTER_OP_IN_PORT_ID, spec->vport_id);
	else
		MCDI_SET_DWORD(inbuf, FILTER_OP_IN_PORT_ID, efx->vport_id);
	MCDI_SET_DWORD(inbuf, FILTER_OP_IN_RX_DEST,
		       spec->dmaq_id == EFX_FILTER_RX_DMAQ_ID_DROP ?

Annotation

Implementation Notes