drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.c
Extension
.c
Size
4312 bytes
Lines
171
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

if (length % NFP_NET_CFG_TLV_LENGTH_INC) {
			dev_err(dev, "TLV size not multiple of %u offset:%u len:%u\n",
				NFP_NET_CFG_TLV_LENGTH_INC, offset, length);
			return -EINVAL;
		}
		if (data + length > end) {
			dev_err(dev, "oversized TLV offset:%u len:%u\n",
				offset, length);
			return -EINVAL;
		}

		switch (FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr)) {
		case NFP_NET_CFG_TLV_TYPE_UNKNOWN:
			dev_err(dev, "NULL TLV at offset:%u\n", offset);
			return -EINVAL;
		case NFP_NET_CFG_TLV_TYPE_RESERVED:
			break;
		case NFP_NET_CFG_TLV_TYPE_END:
			if (!length)
				return 0;

			dev_err(dev, "END TLV should be empty, has offset:%u len:%d\n",
				offset, length);
			return -EINVAL;
		case NFP_NET_CFG_TLV_TYPE_ME_FREQ:
			if (length != 4) {
				dev_err(dev,
					"ME FREQ TLV should be 4B, is %dB offset:%u\n",
					length, offset);
				return -EINVAL;
			}

			caps->me_freq_mhz = readl(data);
			break;
		case NFP_NET_CFG_TLV_TYPE_MBOX:
			if (!length) {
				caps->mbox_off = 0;
				caps->mbox_len = 0;
			} else {
				caps->mbox_off = data - ctrl_mem;
				caps->mbox_len = length;
			}
			break;
		case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL0:
		case NFP_NET_CFG_TLV_TYPE_EXPERIMENTAL1:
			dev_warn(dev,
				 "experimental TLV type:%u offset:%u len:%u\n",
				 FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr),
				 offset, length);
			break;
		case NFP_NET_CFG_TLV_TYPE_REPR_CAP:
			if (length < 4) {
				dev_err(dev, "REPR CAP TLV short %dB < 4B offset:%u\n",
					length, offset);
				return -EINVAL;
			}

			caps->repr_cap = readl(data);
			break;
		case NFP_NET_CFG_TLV_TYPE_MBOX_CMSG_TYPES:
			if (length >= 4)
				caps->mbox_cmsg_types = readl(data);
			break;
		case NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS:
			if (!nfp_net_tls_parse_crypto_ops(dev, caps, ctrl_mem,
							  data, length, offset,
							  false))
				return -EINVAL;
			break;
		case NFP_NET_CFG_TLV_TYPE_VNIC_STATS:
			if ((data - ctrl_mem) % 8) {
				dev_warn(dev, "VNIC STATS TLV misaligned, ignoring offset:%u len:%u\n",
					 offset, length);
				break;
			}
			caps->vnic_stats_off = data - ctrl_mem;
			caps->vnic_stats_cnt = length / 10;
			break;
		case NFP_NET_CFG_TLV_TYPE_CRYPTO_OPS_RX_SCAN:
			if (!nfp_net_tls_parse_crypto_ops(dev, caps, ctrl_mem,
							  data, length, offset,
							  true))
				return -EINVAL;
			break;
		default:
			if (!FIELD_GET(NFP_NET_CFG_TLV_HEADER_REQUIRED, hdr))
				break;

			dev_err(dev, "unknown TLV type:%u offset:%u len:%u\n",
				FIELD_GET(NFP_NET_CFG_TLV_HEADER_TYPE, hdr),

Annotation

Implementation Notes