drivers/net/wireless/ath/ath6kl/wmi.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ath/ath6kl/wmi.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ath/ath6kl/wmi.c
Extension
.c
Size
110621 bytes
Lines
4161
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 (vif->fw_vif_idx == if_idx) {
			found = vif;
			break;
		}
	}
	spin_unlock_bh(&ar->list_lock);

	return found;
}

/*  Performs DIX to 802.3 encapsulation for transmit packets.
 *  Assumes the entire DIX header is contiguous and that there is
 *  enough room in the buffer for a 802.3 mac header and LLC+SNAP headers.
 */
int ath6kl_wmi_dix_2_dot3(struct wmi *wmi, struct sk_buff *skb)
{
	struct ath6kl_llc_snap_hdr *llc_hdr;
	struct ethhdr *eth_hdr;
	size_t new_len;
	__be16 type;
	u8 *datap;
	u16 size;

	if (WARN_ON(skb == NULL))
		return -EINVAL;

	size = sizeof(struct ath6kl_llc_snap_hdr) + sizeof(struct wmi_data_hdr);
	if (skb_headroom(skb) < size)
		return -ENOMEM;

	eth_hdr = (struct ethhdr *) skb->data;
	type = eth_hdr->h_proto;

	if (!is_ethertype(be16_to_cpu(type))) {
		ath6kl_dbg(ATH6KL_DBG_WMI,
			   "%s: pkt is already in 802.3 format\n", __func__);
		return 0;
	}

	new_len = skb->len - sizeof(*eth_hdr) + sizeof(*llc_hdr);

	skb_push(skb, sizeof(struct ath6kl_llc_snap_hdr));
	datap = skb->data;

	eth_hdr->h_proto = cpu_to_be16(new_len);

	memcpy(datap, eth_hdr, sizeof(*eth_hdr));

	llc_hdr = (struct ath6kl_llc_snap_hdr *)(datap + sizeof(*eth_hdr));
	llc_hdr->dsap = 0xAA;
	llc_hdr->ssap = 0xAA;
	llc_hdr->cntl = 0x03;
	llc_hdr->org_code[0] = 0x0;
	llc_hdr->org_code[1] = 0x0;
	llc_hdr->org_code[2] = 0x0;
	llc_hdr->eth_type = type;

	return 0;
}

static int ath6kl_wmi_meta_add(struct wmi *wmi, struct sk_buff *skb,
			       u8 *version, void *tx_meta_info)
{
	struct wmi_tx_meta_v1 *v1;
	struct wmi_tx_meta_v2 *v2;

	if (WARN_ON(skb == NULL || version == NULL))
		return -EINVAL;

	switch (*version) {
	case WMI_META_VERSION_1:
		skb_push(skb, WMI_MAX_TX_META_SZ);
		v1 = (struct wmi_tx_meta_v1 *) skb->data;
		v1->pkt_id = 0;
		v1->rate_plcy_id = 0;
		*version = WMI_META_VERSION_1;
		break;
	case WMI_META_VERSION_2:
		skb_push(skb, WMI_MAX_TX_META_SZ);
		v2 = (struct wmi_tx_meta_v2 *) skb->data;
		memcpy(v2, (struct wmi_tx_meta_v2 *) tx_meta_info,
		       sizeof(struct wmi_tx_meta_v2));
		break;
	}

	return 0;
}

int ath6kl_wmi_data_hdr_add(struct wmi *wmi, struct sk_buff *skb,
			    u8 msg_type, u32 flags,

Annotation

Implementation Notes