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ath11k: Supporting RX ring backpressure HTT event and stats handling

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The Firmware sends HTT event to host whenever there is a
backpressure on RX rings, Handling such event and dumping
info on the console under the "ATH11K_DBG_DP_HTT"  debug level.

Fetching RX ring backpressure histogram from FW via htt_stats debugfs.

 #echo "24" > /sys/kernel/debug/ath11k/ipq8074/macX/htt_stats_type
 #cat /sys/kernel/debug/ath11k/ipq8074/macX/htt_stats

Signed-off-by: Vikas Patel <vikpatel@codeaurora.org>
Signed-off-by: Sriram R <srirrama@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Sriram R 2020-03-16 14:58:40 +05:30 committed by Kalle Valo
parent beb2f77297
commit 678e8414bf
5 changed files with 108 additions and 0 deletions
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2
drivers/net/wireless/ath/ath11k/debug.h
View File

@ -53,6 +53,8 @@ enum ath11k_dbg_htt_ext_stats_type {
ATH11K_DBG_HTT_EXT_STATS_TWT_SESSIONS = 20,
ATH11K_DBG_HTT_EXT_STATS_REO_RESOURCE_STATS = 21,
ATH11K_DBG_HTT_EXT_STATS_TX_SOUNDING_INFO = 22,
ATH11K_DBG_HTT_EXT_STATS_PDEV_OBSS_PD_STATS = 23,
ATH11K_DBG_HTT_EXT_STATS_RING_BACKPRESSURE_STATS = 24,
/* keep this last */
ATH11K_DBG_HTT_NUM_EXT_STATS,

44
drivers/net/wireless/ath/ath11k/debug_htt_stats.c
View File

@ -3854,6 +3854,47 @@ htt_print_pdev_obss_pd_stats_tlv_v(const void *tag_buf,
stats_req->buf_len = len;
}
static inline void htt_print_backpressure_stats_tlv_v(const u32 *tag_buf,
u8 *data)
{
struct debug_htt_stats_req *stats_req =
(struct debug_htt_stats_req *)data;
struct htt_ring_backpressure_stats_tlv *htt_stats_buf =
(struct htt_ring_backpressure_stats_tlv *)tag_buf;
int i;
u8 *buf = stats_req->buf;
u32 len = stats_req->buf_len;
u32 buf_len = ATH11K_HTT_STATS_BUF_SIZE;
len += HTT_DBG_OUT(buf + len, buf_len - len, "pdev_id = %u",
htt_stats_buf->pdev_id);
len += HTT_DBG_OUT(buf + len, buf_len - len, "current_head_idx = %u",
htt_stats_buf->current_head_idx);
len += HTT_DBG_OUT(buf + len, buf_len - len, "current_tail_idx = %u",
htt_stats_buf->current_tail_idx);
len += HTT_DBG_OUT(buf + len, buf_len - len, "num_htt_msgs_sent = %u",
htt_stats_buf->num_htt_msgs_sent);
len += HTT_DBG_OUT(buf + len, buf_len - len,
"backpressure_time_ms = %u",
htt_stats_buf->backpressure_time_ms);
for (i = 0; i < 5; i++)
len += HTT_DBG_OUT(buf + len, buf_len - len,
"backpressure_hist_%u = %u",
i + 1, htt_stats_buf->backpressure_hist[i]);
len += HTT_DBG_OUT(buf + len, buf_len - len,
"============================");
if (len >= buf_len) {
buf[buf_len - 1] = 0;
stats_req->buf_len = buf_len - 1;
} else {
buf[len] = 0;
stats_req->buf_len = len;
}
}
static inline void htt_htt_stats_debug_dump(const u32 *tag_buf,
struct debug_htt_stats_req *stats_req)
{
@ -4246,6 +4287,9 @@ static int ath11k_dbg_htt_ext_stats_parse(struct ath11k_base *ab,
case HTT_STATS_PDEV_OBSS_PD_TAG:
htt_print_pdev_obss_pd_stats_tlv_v(tag_buf, stats_req);
break;
case HTT_STATS_RING_BACKPRESSURE_STATS_TAG:
htt_print_backpressure_stats_tlv_v(tag_buf, user_data);
break;
default:
break;
}

28
drivers/net/wireless/ath/ath11k/debug_htt_stats.h
View File

@ -100,6 +100,8 @@ enum htt_tlv_tag_t {
HTT_STATS_SCHED_TXQ_SCHED_ORDER_SU_TAG = 86,
HTT_STATS_SCHED_TXQ_SCHED_INELIGIBILITY_TAG = 87,
HTT_STATS_PDEV_OBSS_PD_TAG = 88,
HTT_STATS_HW_WAR_TAG = 89,
HTT_STATS_RING_BACKPRESSURE_STATS_TAG = 90,
HTT_STATS_MAX_TAG,
};
@ -1659,4 +1661,30 @@ struct htt_pdev_obss_pd_stats_tlv {
};
void ath11k_debug_htt_stats_init(struct ath11k *ar);
struct htt_ring_backpressure_stats_tlv {
u32 pdev_id;
u32 current_head_idx;
u32 current_tail_idx;
u32 num_htt_msgs_sent;
/* Time in milliseconds for which the ring has been in
* its current backpressure condition
*/
u32 backpressure_time_ms;
/* backpressure_hist - histogram showing how many times
* different degrees of backpressure duration occurred:
* Index 0 indicates the number of times ring was
* continuously in backpressure state for 100 - 200ms.
* Index 1 indicates the number of times ring was
* continuously in backpressure state for 200 - 300ms.
* Index 2 indicates the number of times ring was
* continuously in backpressure state for 300 - 400ms.
* Index 3 indicates the number of times ring was
* continuously in backpressure state for 400 - 500ms.
* Index 4 indicates the number of times ring was
* continuously in backpressure state beyond 500ms.
*/
u32 backpressure_hist[5];
};
#endif

8
drivers/net/wireless/ath/ath11k/dp.h
View File

@ -936,6 +936,7 @@ enum htt_t2h_msg_type {
HTT_T2H_MSG_TYPE_PEER_UNMAP = 0x1f,
HTT_T2H_MSG_TYPE_PPDU_STATS_IND = 0x1d,
HTT_T2H_MSG_TYPE_EXT_STATS_CONF = 0x1c,
HTT_T2H_MSG_TYPE_BKPRESSURE_EVENT_IND = 0x24,
};
#define HTT_TARGET_VERSION_MAJOR 3
@ -984,6 +985,13 @@ struct htt_resp_msg {
};
} __packed;
#define HTT_BACKPRESSURE_EVENT_PDEV_ID_M GENMASK(15, 8)
#define HTT_BACKPRESSURE_EVENT_RING_TYPE_M GENMASK(23, 16)
#define HTT_BACKPRESSURE_EVENT_RING_ID_M GENMASK(31, 24)
#define HTT_BACKPRESSURE_EVENT_HP_M GENMASK(15, 0)
#define HTT_BACKPRESSURE_EVENT_TP_M GENMASK(31, 16)
/* ppdu stats
*
* @details

26
drivers/net/wireless/ath/ath11k/dp_rx.c
View File

@ -1499,6 +1499,29 @@ static void ath11k_htt_pktlog(struct ath11k_base *ab, struct sk_buff *skb)
trace_ath11k_htt_pktlog(ar, data->payload, hdr->size);
}
static void ath11k_htt_backpressure_event_handler(struct ath11k_base *ab,
struct sk_buff *skb)
{
u32 *data = (u32 *)skb->data;
u8 pdev_id, ring_type, ring_id;
u16 hp, tp;
u32 backpressure_time;
pdev_id = FIELD_GET(HTT_BACKPRESSURE_EVENT_PDEV_ID_M, *data);
ring_type = FIELD_GET(HTT_BACKPRESSURE_EVENT_RING_TYPE_M, *data);
ring_id = FIELD_GET(HTT_BACKPRESSURE_EVENT_RING_ID_M, *data);
++data;
hp = FIELD_GET(HTT_BACKPRESSURE_EVENT_HP_M, *data);
tp = FIELD_GET(HTT_BACKPRESSURE_EVENT_TP_M, *data);
++data;
backpressure_time = *data;
ath11k_dbg(ab, ATH11K_DBG_DP_HTT, "htt backpressure event, pdev %d, ring type %d,ring id %d, hp %d tp %d, backpressure time %d\n",
pdev_id, ring_type, ring_id, hp, tp, backpressure_time);
}
void ath11k_dp_htt_htc_t2h_msg_handler(struct ath11k_base *ab,
struct sk_buff *skb)
{
@ -1548,6 +1571,9 @@ void ath11k_dp_htt_htc_t2h_msg_handler(struct ath11k_base *ab,
case HTT_T2H_MSG_TYPE_PKTLOG:
ath11k_htt_pktlog(ab, skb);
break;
case HTT_T2H_MSG_TYPE_BKPRESSURE_EVENT_IND:
ath11k_htt_backpressure_event_handler(ab, skb);
break;
default:
ath11k_warn(ab, "htt event %d not handled\n", type);
break;