drivers/net/wireless/broadcom/brcm80211/brcmfmac/vendor.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/broadcom/brcm80211/brcmfmac/vendor.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/broadcom/brcm80211/brcmfmac/vendor.c
Extension
.c
Size
2719 bytes
Lines
119
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 (len > BRCMF_DCMD_MAXLEN) {
			brcmf_err("oversize input buffer %d\n", len);
			len = BRCMF_DCMD_MAXLEN;
		}
		if (ret_len > BRCMF_DCMD_MAXLEN) {
			brcmf_err("oversize return buffer %d\n", ret_len);
			ret_len = BRCMF_DCMD_MAXLEN;
		}
		payload = max_t(unsigned int, ret_len, len) + 1;
		dcmd_buf = vzalloc(payload);
		if (NULL == dcmd_buf)
			return -ENOMEM;

		memcpy(dcmd_buf, (void *)cmdhdr + cmdhdr->offset, len);
		*(char *)(dcmd_buf + len)  = '\0';
	}

	if (cmdhdr->set)
		ret = brcmf_fil_cmd_data_set(ifp, cmdhdr->cmd, dcmd_buf,
					     ret_len);
	else
		ret = brcmf_fil_cmd_data_get(ifp, cmdhdr->cmd, dcmd_buf,
					     ret_len);
	if (ret != 0)
		goto exit;

	wr_pointer = dcmd_buf;
	while (ret_len > 0) {
		msglen = ret_len > maxmsglen ? maxmsglen : ret_len;
		ret_len -= msglen;
		payload = msglen + sizeof(msglen);
		reply = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, payload);
		if (NULL == reply) {
			ret = -ENOMEM;
			break;
		}

		if (nla_put(reply, BRCMF_NLATTR_DATA, msglen, wr_pointer) ||
		    nla_put_u16(reply, BRCMF_NLATTR_LEN, msglen)) {
			kfree_skb(reply);
			ret = -ENOBUFS;
			break;
		}

		ret = cfg80211_vendor_cmd_reply(reply);
		if (ret)
			break;

		wr_pointer += msglen;
	}

exit:
	vfree(dcmd_buf);

	return ret;
}

const struct wiphy_vendor_command brcmf_vendor_cmds[] = {
	{
		{
			.vendor_id = BROADCOM_OUI,
			.subcmd = BRCMF_VNDR_CMDS_DCMD
		},
		.flags = WIPHY_VENDOR_CMD_NEED_WDEV |
			 WIPHY_VENDOR_CMD_NEED_NETDEV,
		.policy = VENDOR_CMD_RAW_DATA,
		.doit = brcmf_cfg80211_vndr_cmds_dcmd_handler
	},
};

Annotation

Implementation Notes