drivers/net/wireless/ath/ath11k/testmode.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ath/ath11k/testmode.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ath/ath11k/testmode.c
Extension
.c
Size
12156 bytes
Lines
504
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

nla_put(nl_skb, ATH_TM_ATTR_DATA, skb->len, skb->data)) {
		ath11k_warn(ab, "failed to populate testmode unsegmented event\n");
		kfree_skb(nl_skb);
		goto out;
	}

	cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
	spin_unlock_bh(&ar->data_lock);
	return;

out:
	spin_unlock_bh(&ar->data_lock);
	ath11k_warn(ab, "Failed to send testmode event to higher layers\n");
}

/* This function handles segmented events. Data of various events received
 * from firmware is aggregated and sent to application layer
 */
static int ath11k_tm_process_event(struct ath11k_base *ab, u32 cmd_id,
				   const struct wmi_ftm_event_msg *ftm_msg,
				   u16 length)
{
	struct sk_buff *nl_skb;
	int ret = 0;
	struct ath11k *ar;
	u8 const *buf_pos;
	u16 datalen;
	u8 total_segments, current_seq;
	u32 data_pos;
	u32 pdev_id;

	ath11k_dbg(ab, ATH11K_DBG_TESTMODE,
		   "event wmi cmd_id %d ftm event msg %p datalen %d\n",
		   cmd_id, ftm_msg, length);
	ath11k_dbg_dump(ab, ATH11K_DBG_TESTMODE, NULL, "", ftm_msg, length);
	pdev_id = DP_HW2SW_MACID(ftm_msg->seg_hdr.pdev_id);

	if (pdev_id >= ab->num_radios) {
		ath11k_warn(ab, "testmode event not handled due to invalid pdev id: %d\n",
			    pdev_id);
		return -EINVAL;
	}

	ar = ab->pdevs[pdev_id].ar;
	if (!ar) {
		ath11k_warn(ab, "testmode event not handled due to absence of pdev\n");
		return -ENODEV;
	}

	current_seq = FIELD_GET(ATH11K_FTM_SEGHDR_CURRENT_SEQ,
				ftm_msg->seg_hdr.segmentinfo);
	total_segments = FIELD_GET(ATH11K_FTM_SEGHDR_TOTAL_SEGMENTS,
				   ftm_msg->seg_hdr.segmentinfo);
	datalen = length - (sizeof(struct wmi_ftm_seg_hdr));
	buf_pos = ftm_msg->data;

	spin_lock_bh(&ar->data_lock);

	if (current_seq == 0) {
		ab->testmode.expected_seq = 0;
		ab->testmode.data_pos = 0;
	}

	data_pos = ab->testmode.data_pos;

	if ((data_pos + datalen) > ATH_FTM_EVENT_MAX_BUF_LENGTH) {
		ath11k_warn(ab, "Invalid ftm event length at %d: %d\n",
			    data_pos, datalen);
		ret = -EINVAL;
		goto out;
	}

	memcpy(&ab->testmode.eventdata[data_pos], buf_pos, datalen);
	data_pos += datalen;

	if (++ab->testmode.expected_seq != total_segments) {
		ab->testmode.data_pos = data_pos;
		ath11k_dbg(ab, ATH11K_DBG_TESTMODE,
			   "partial data received current_seq %d total_seg %d\n",
			    current_seq, total_segments);
		goto out;
	}

	ath11k_dbg(ab, ATH11K_DBG_TESTMODE,
		   "total data length pos %d len %d\n",
		    data_pos, ftm_msg->seg_hdr.len);
	nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
						   2 * nla_total_size(sizeof(u32)) +
						   nla_total_size(data_pos),
						   GFP_ATOMIC);

Annotation

Implementation Notes