From patchwork Mon Apr 29 07:27:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tamizh Chelvam Raja X-Patchwork-Id: 13646419 X-Patchwork-Delegate: kvalo@adurom.com Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5DCB5134DE for ; Mon, 29 Apr 2024 07:27:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714375662; cv=none; b=KxatvyHGyjYICKe5mC3Rud2RqtT0j46zprjfAgVmZPXimBYtepXfNwNbzUjOUc3AGchMHIU+DFwbCftbltD4bCIIeWwiFMJIFlEdoR4g4W+dc5wTIjm7277Hx8hLdgh0pYDFS5vqNk1kheIvElKLVYNxwmjliktrYvEls9XX3cc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714375662; c=relaxed/simple; bh=vDZ3iizoQzk+FdPTfdnyaL1qvKTvSJ0C1qBvMQvtV0A=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=AEwoPjAznQd+Tu6UmlpD/KsQ7dbVE44tTqeeWcPs9Fjw33zmzUP0a/gKvfTdtGUbyajaDvvde2av2jDzuAM7BJYLYsugdWuBepIAMBmSxP0D1EeWgg/razM9sC/nfph/Cu/RWFVHewd7QYAf5V7RzQVarJd9Mfz1G6qrl7qknzg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=OuoKULnb; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="OuoKULnb" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 43T5L8Hp024225; Mon, 29 Apr 2024 07:27:38 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding:content-type; s=qcppdkim1; bh=Qb3/qj8 BDdjM2l978ZwujkPeSakWiXeuXcjnYbqnHtE=; b=OuoKULnblweFYDjf9fuamAj uFAtKuJ+ZJORtXN6u1xHT/ELxSDqb5OyTFMjgsNvnIDKEeGomX4MqIFy1K4llzHA MVG6OhhGPOJH932bO3QLcLGO9AY1jL/Rz0heE7AAuqtmugOb1uREqGzQ9kCXMaY2 GwSPWXlskMZ+TbwY7FoDiC2l+IIxarLDizvwQr1oo1KIbor9PilF5gGlckO5+YT4 1qhlRTOIaix4erJ7lcjA6u52L+sQK7GZtyIOuVbXI/7KuAVZmjE8kDo7AVBVOTct E5m1+An5ADcMurU0iM9d8cUvoAxKKLEoBp795MmSV95phsYBEG9ZJxm9M/MBvGQ= = Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xrthtax3d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 29 Apr 2024 07:27:38 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 43T7RbHs020134 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 29 Apr 2024 07:27:37 GMT Received: from hu-tamizhr-blr.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 29 Apr 2024 00:27:35 -0700 From: Tamizh Chelvam Raja To: CC: , Venkateswara Naralasetty , Tamizh Chelvam Raja Subject: [PATCHv4] wifi: ath11k: skip status ring entry processing Date: Mon, 29 Apr 2024 12:57:23 +0530 Message-ID: <20240429072723.712841-1-quic_tamizhr@quicinc.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: cZm5ZGuEdnQE80NE20GK7CWGW2m8OWvY X-Proofpoint-GUID: cZm5ZGuEdnQE80NE20GK7CWGW2m8OWvY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-29_04,2024-04-26_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 mlxscore=0 adultscore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 priorityscore=1501 bulkscore=0 phishscore=0 mlxlogscore=719 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2404010003 definitions=main-2404290047 From: Venkateswara Naralasetty If STATUS_BUFFER_DONE is not set for a monitor status ring entry, we don't process the status ring until STATUS_BUFFER_DONE set for that status ring entry. During LMAC reset it may happen that hardware will not write STATUS_BUFFER_DONE tlv in status buffer, in that case we end up waiting for STATUS_BUFFER_DONE leading to backpressure on monitor status ring. To fix the issue, when HP(Head Pointer) + 1 entry is peeked and if DMA is not done and if HP + 2 entry's DMA done is set, replenish HP + 1 entry and start processing in next interrupt. If HP + 2 entry's DMA done is not set, poll onto HP + 1 entry DMA done to be set. Also, during monitor attach HP points to the end of the ring and TP(Tail Pointer) points to the start of the ring. Using ath11k_hal_srng_src_peek() may result in processing invalid buffer for the very first interrupt. Since, HW starts writing buffer from TP. To avoid this issue call ath11k_hal_srng_src_next_peek() instead of calling ath11k_hal_srng_src_peek(). Tested-on: IPQ5018 hw1.0 AHB WLAN.HK.2.6.0.1-00861-QCAHKSWPL_SILICONZ-1 Signed-off-by: Venkateswara Naralasetty Co-developed-by: Tamizh Chelvam Raja Signed-off-by: Tamizh Chelvam Raja --- v4: * Removed kernel reported compilation warning from Signed off place v3: * Rebased on top of ToT v2: * Fixed compilation warning Reported-by: kernel test robot drivers/net/wireless/ath/ath11k/dp_rx.c | 88 ++++++++++++++++++++++--- drivers/net/wireless/ath/ath11k/hal.c | 14 ++++ drivers/net/wireless/ath/ath11k/hal.h | 2 + 3 files changed, 94 insertions(+), 10 deletions(-) base-commit: bf99bc7423e18aa3475ef00a7a6fb773c31ce6df diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index afd481f5858f..79b7f4996f5d 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -2990,11 +2990,52 @@ ath11k_dp_rx_mon_update_status_buf_state(struct ath11k_mon_data *pmon, } } +static enum dp_mon_status_buf_state +ath11k_dp_rx_mon_handle_status_buf_done(struct ath11k_base *ab, struct hal_srng *srng, + struct dp_rxdma_ring *rx_ring) +{ + struct ath11k_skb_rxcb *rxcb; + struct hal_tlv_hdr *tlv; + struct sk_buff *skb; + void *status_desc; + dma_addr_t paddr; + u32 cookie; + int buf_id; + u8 rbm; + + status_desc = ath11k_hal_srng_src_next_peek(ab, srng); + if (!status_desc) + return DP_MON_STATUS_NO_DMA; + + ath11k_hal_rx_buf_addr_info_get(status_desc, &paddr, &cookie, &rbm); + + buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID, cookie); + + spin_lock_bh(&rx_ring->idr_lock); + skb = idr_find(&rx_ring->bufs_idr, buf_id); + spin_unlock_bh(&rx_ring->idr_lock); + + if (!skb) + return DP_MON_STATUS_NO_DMA; + + rxcb = ATH11K_SKB_RXCB(skb); + dma_sync_single_for_cpu(ab->dev, rxcb->paddr, + skb->len + skb_tailroom(skb), + DMA_FROM_DEVICE); + + tlv = (struct hal_tlv_hdr *)skb->data; + if (FIELD_GET(HAL_TLV_HDR_TAG, tlv->tl) != HAL_RX_STATUS_BUFFER_DONE) + return DP_MON_STATUS_NO_DMA; + + return DP_MON_STATUS_REPLINISH; +} + static int ath11k_dp_rx_reap_mon_status_ring(struct ath11k_base *ab, int mac_id, int *budget, struct sk_buff_head *skb_list) { struct ath11k *ar; const struct ath11k_hw_hal_params *hal_params; + enum dp_mon_status_buf_state reap_status; struct ath11k_pdev_dp *dp; struct dp_rxdma_ring *rx_ring; struct ath11k_mon_data *pmon; @@ -3022,8 +3063,7 @@ static int ath11k_dp_rx_reap_mon_status_ring(struct ath11k_base *ab, int mac_id, ath11k_hal_srng_access_begin(ab, srng); while (*budget) { *budget -= 1; - rx_mon_status_desc = - ath11k_hal_srng_src_peek(ab, srng); + rx_mon_status_desc = ath11k_hal_srng_src_peek(ab, srng); if (!rx_mon_status_desc) { pmon->buf_state = DP_MON_STATUS_REPLINISH; break; @@ -3057,15 +3097,43 @@ static int ath11k_dp_rx_reap_mon_status_ring(struct ath11k_base *ab, int mac_id, ath11k_warn(ab, "mon status DONE not set %lx, buf_id %d\n", FIELD_GET(HAL_TLV_HDR_TAG, tlv->tl), buf_id); - /* If done status is missing, hold onto status - * ring until status is done for this status - * ring buffer. - * Keep HP in mon_status_ring unchanged, - * and break from here. - * Check status for same buffer for next time + /* RxDMA status done bit might not be set even + * though tp is moved by HW. */ - pmon->buf_state = DP_MON_STATUS_NO_DMA; - break; + + /* If done status is missing: + * 1. As per MAC team's suggestion, + * when HP + 1 entry is peeked and if DMA + * is not done and if HP + 2 entry's DMA done + * is set. skip HP + 1 entry and + * start processing in next interrupt. + * 2. If HP + 2 entry's DMA done is not set, + * poll onto HP + 1 entry DMA done to be set. + * Check status for same buffer for next time + * dp_rx_mon_status_srng_process + */ + + reap_status = ath11k_dp_rx_mon_handle_status_buf_done(ab, srng, + rx_ring); + if (reap_status == DP_MON_STATUS_NO_DMA) { + continue; + } else if (reap_status == DP_MON_STATUS_REPLINISH) { + ath11k_warn(ab, "mon status DONE not set %lx, buf_id %d\n", + FIELD_GET(HAL_TLV_HDR_TAG, tlv->tl), + buf_id); + + spin_lock_bh(&rx_ring->idr_lock); + idr_remove(&rx_ring->bufs_idr, buf_id); + spin_unlock_bh(&rx_ring->idr_lock); + + dma_unmap_single(ab->dev, rxcb->paddr, + skb->len + skb_tailroom(skb), + DMA_FROM_DEVICE); + + dev_kfree_skb_any(skb); + pmon->buf_state = DP_MON_STATUS_REPLINISH; + goto move_next; + } } spin_lock_bh(&rx_ring->idr_lock); diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c index f3d04568c221..dbba45c22dc6 100644 --- a/drivers/net/wireless/ath/ath11k/hal.c +++ b/drivers/net/wireless/ath/ath11k/hal.c @@ -796,6 +796,20 @@ u32 *ath11k_hal_srng_src_get_next_reaped(struct ath11k_base *ab, return desc; } +u32 *ath11k_hal_srng_src_next_peek(struct ath11k_base *ab, struct hal_srng *srng) +{ + u32 next_hp; + + lockdep_assert_held(&srng->lock); + + next_hp = (srng->u.src_ring.hp + srng->entry_size) % srng->ring_size; + + if (next_hp != srng->u.src_ring.cached_tp) + return srng->ring_base_vaddr + next_hp; + + return NULL; +} + u32 *ath11k_hal_srng_src_peek(struct ath11k_base *ab, struct hal_srng *srng) { lockdep_assert_held(&srng->lock); diff --git a/drivers/net/wireless/ath/ath11k/hal.h b/drivers/net/wireless/ath/ath11k/hal.h index e453c137385e..dc8bbe073017 100644 --- a/drivers/net/wireless/ath/ath11k/hal.h +++ b/drivers/net/wireless/ath/ath11k/hal.h @@ -947,6 +947,8 @@ u32 *ath11k_hal_srng_dst_peek(struct ath11k_base *ab, struct hal_srng *srng); int ath11k_hal_srng_dst_num_free(struct ath11k_base *ab, struct hal_srng *srng, bool sync_hw_ptr); u32 *ath11k_hal_srng_src_peek(struct ath11k_base *ab, struct hal_srng *srng); +u32 *ath11k_hal_srng_src_next_peek(struct ath11k_base *ab, + struct hal_srng *srng); u32 *ath11k_hal_srng_src_get_next_reaped(struct ath11k_base *ab, struct hal_srng *srng); u32 *ath11k_hal_srng_src_reap_next(struct ath11k_base *ab,