From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A23DA2494F0; Wed, 8 Apr 2026 18:20:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775672452; cv=none; b=WlOVwF7Li7GqxxwiwM7nHs9Y81wZ8xrnH1qWjhCywuZdS1gUHd63iSsOaHqwumc6EK/UruLVebd60VzFN0NAO0V/fQv5+phE23T//OtWPHQWbHT3XT4AoLqoIee5jVaCa1lE1CbUN4V+ORGxabTWL+peCme0hngNniuia859has= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775672452; c=relaxed/simple; bh=yHOC3l8Xd+tnuYkmaQCO37LCD6uAX+fdNtwlhG5plD4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kUmGBJVCO5U8WLgDN6xUZuOTfk0SL7bNwSmBHqYBlRd2wtbGP609lPKIn0BIRom7HhY3b9GIf/vC2SKABmm6mPypjvl71s10Q4lS5qnNl8k8ceFh4iHFhtObPCed/iH+sMq5KLhKmv125ZxfYS6oF49KxeRCbWIbb86hncUBFX4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sow8KIxG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="sow8KIxG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 10180C19421; Wed, 8 Apr 2026 18:20:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1775672452; bh=yHOC3l8Xd+tnuYkmaQCO37LCD6uAX+fdNtwlhG5plD4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sow8KIxGlpb759+tKrzG2LBSl5FOWZ7jT0GH7DRa5f0O10UIBHouHeViJdfyhd3nS sZ9aaeM4hdUPpZgu4maedbNYFEgpmbhIuOvKoMduXu8exMh8LDnbKWfGcmEtofSdXn n8h+x+R7t3dJkRCgmUXok64D6xobsD4peqPymeOs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, P Praneesh , Tim Harvey , Jeff Johnson , Sasha Levin Subject: [PATCH 6.6 013/160] wifi: ath11k: Use dma_alloc_noncoherent for rx_tid buffer allocation Date: Wed, 8 Apr 2026 20:01:40 +0200 Message-ID: <20260408175913.691283178@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260408175913.177092714@linuxfoundation.org> References: <20260408175913.177092714@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: P Praneesh [ Upstream commit eeadc6baf8b3dcd32787cc84f0473dc2a2850370 ] Currently, the driver allocates cacheable DMA buffers for the rx_tid structure using kzalloc() and dma_map_single(). These buffers are long-lived and can persist for the lifetime of the peer, which is not advisable. Instead of using kzalloc() and dma_map_single() for allocating cacheable DMA buffers, utilize the dma_alloc_noncoherent() helper for the allocation of long-lived cacheable DMA buffers, such as the peer's rx_tid. Since dma_alloc_noncoherent() returns unaligned physical and virtual addresses, align them internally before use within the driver. This ensures proper allocation of non-coherent memory through the kernel helper. Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1 Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3 Signed-off-by: P Praneesh Tested-by: Tim Harvey Link: https://patch.msgid.link/20250119164219.647059-3-quic_ppranees@quicinc.com Signed-off-by: Jeff Johnson Stable-dep-of: e225b36f83d7 ("wifi: ath11k: Pass the correct value of each TID during a stop AMPDU session") Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath11k/dp.h | 6 +- drivers/net/wireless/ath/ath11k/dp_rx.c | 117 +++++++++++------------- 2 files changed, 58 insertions(+), 65 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/dp.h b/drivers/net/wireless/ath/ath11k/dp.h index 2f6dd69d3be27..0ce26f76bb815 100644 --- a/drivers/net/wireless/ath/ath11k/dp.h +++ b/drivers/net/wireless/ath/ath11k/dp.h @@ -1,7 +1,7 @@ /* SPDX-License-Identifier: BSD-3-Clause-Clear */ /* * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved. - * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved. + * Copyright (c) 2021-2023, 2025 Qualcomm Innovation Center, Inc. All rights reserved. */ #ifndef ATH11K_DP_H @@ -20,7 +20,6 @@ struct ath11k_ext_irq_grp; struct dp_rx_tid { u8 tid; - u32 *vaddr; dma_addr_t paddr; u32 size; u32 ba_win_sz; @@ -37,6 +36,9 @@ struct dp_rx_tid { /* Timer info related to fragments */ struct timer_list frag_timer; struct ath11k_base *ab; + u32 *vaddr_unaligned; + dma_addr_t paddr_unaligned; + u32 unaligned_size; }; #define DP_REO_DESC_FREE_THRESHOLD 64 diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c index c37722a727309..411749e8e209e 100644 --- a/drivers/net/wireless/ath/ath11k/dp_rx.c +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: BSD-3-Clause-Clear /* * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved. - * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved. + * Copyright (c) 2021-2025 Qualcomm Innovation Center, Inc. All rights reserved. */ #include @@ -675,11 +675,11 @@ void ath11k_dp_reo_cmd_list_cleanup(struct ath11k_base *ab) list_for_each_entry_safe(cmd, tmp, &dp->reo_cmd_list, list) { list_del(&cmd->list); rx_tid = &cmd->data; - if (rx_tid->vaddr) { - dma_unmap_single(ab->dev, rx_tid->paddr, - rx_tid->size, DMA_BIDIRECTIONAL); - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; + if (rx_tid->vaddr_unaligned) { + dma_free_noncoherent(ab->dev, rx_tid->unaligned_size, + rx_tid->vaddr_unaligned, + rx_tid->paddr_unaligned, DMA_BIDIRECTIONAL); + rx_tid->vaddr_unaligned = NULL; } kfree(cmd); } @@ -689,11 +689,11 @@ void ath11k_dp_reo_cmd_list_cleanup(struct ath11k_base *ab) list_del(&cmd_cache->list); dp->reo_cmd_cache_flush_count--; rx_tid = &cmd_cache->data; - if (rx_tid->vaddr) { - dma_unmap_single(ab->dev, rx_tid->paddr, - rx_tid->size, DMA_BIDIRECTIONAL); - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; + if (rx_tid->vaddr_unaligned) { + dma_free_noncoherent(ab->dev, rx_tid->unaligned_size, + rx_tid->vaddr_unaligned, + rx_tid->paddr_unaligned, DMA_BIDIRECTIONAL); + rx_tid->vaddr_unaligned = NULL; } kfree(cmd_cache); } @@ -708,11 +708,11 @@ static void ath11k_dp_reo_cmd_free(struct ath11k_dp *dp, void *ctx, if (status != HAL_REO_CMD_SUCCESS) ath11k_warn(dp->ab, "failed to flush rx tid hw desc, tid %d status %d\n", rx_tid->tid, status); - if (rx_tid->vaddr) { - dma_unmap_single(dp->ab->dev, rx_tid->paddr, rx_tid->size, - DMA_BIDIRECTIONAL); - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; + if (rx_tid->vaddr_unaligned) { + dma_free_noncoherent(dp->ab->dev, rx_tid->unaligned_size, + rx_tid->vaddr_unaligned, + rx_tid->paddr_unaligned, DMA_BIDIRECTIONAL); + rx_tid->vaddr_unaligned = NULL; } } @@ -749,10 +749,10 @@ static void ath11k_dp_reo_cache_flush(struct ath11k_base *ab, if (ret) { ath11k_err(ab, "failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid %d (%d)\n", rx_tid->tid, ret); - dma_unmap_single(ab->dev, rx_tid->paddr, rx_tid->size, - DMA_BIDIRECTIONAL); - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; + dma_free_noncoherent(ab->dev, rx_tid->unaligned_size, + rx_tid->vaddr_unaligned, + rx_tid->paddr_unaligned, DMA_BIDIRECTIONAL); + rx_tid->vaddr_unaligned = NULL; } } @@ -802,10 +802,10 @@ static void ath11k_dp_rx_tid_del_func(struct ath11k_dp *dp, void *ctx, return; free_desc: - dma_unmap_single(ab->dev, rx_tid->paddr, rx_tid->size, - DMA_BIDIRECTIONAL); - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; + dma_free_noncoherent(ab->dev, rx_tid->unaligned_size, + rx_tid->vaddr_unaligned, + rx_tid->paddr_unaligned, DMA_BIDIRECTIONAL); + rx_tid->vaddr_unaligned = NULL; } void ath11k_peer_rx_tid_delete(struct ath11k *ar, @@ -831,14 +831,16 @@ void ath11k_peer_rx_tid_delete(struct ath11k *ar, if (ret != -ESHUTDOWN) ath11k_err(ar->ab, "failed to send HAL_REO_CMD_UPDATE_RX_QUEUE cmd, tid %d (%d)\n", tid, ret); - dma_unmap_single(ar->ab->dev, rx_tid->paddr, rx_tid->size, - DMA_BIDIRECTIONAL); - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; + dma_free_noncoherent(ar->ab->dev, rx_tid->unaligned_size, + rx_tid->vaddr_unaligned, + rx_tid->paddr_unaligned, DMA_BIDIRECTIONAL); + rx_tid->vaddr_unaligned = NULL; } rx_tid->paddr = 0; + rx_tid->paddr_unaligned = 0; rx_tid->size = 0; + rx_tid->unaligned_size = 0; } static int ath11k_dp_rx_link_desc_return(struct ath11k_base *ab, @@ -982,10 +984,9 @@ static void ath11k_dp_rx_tid_mem_free(struct ath11k_base *ab, if (!rx_tid->active) goto unlock_exit; - dma_unmap_single(ab->dev, rx_tid->paddr, rx_tid->size, - DMA_BIDIRECTIONAL); - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; + dma_free_noncoherent(ab->dev, rx_tid->unaligned_size, rx_tid->vaddr_unaligned, + rx_tid->paddr_unaligned, DMA_BIDIRECTIONAL); + rx_tid->vaddr_unaligned = NULL; rx_tid->active = false; @@ -1000,9 +1001,8 @@ int ath11k_peer_rx_tid_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id, struct ath11k_base *ab = ar->ab; struct ath11k_peer *peer; struct dp_rx_tid *rx_tid; - u32 hw_desc_sz; - u32 *addr_aligned; - void *vaddr; + u32 hw_desc_sz, *vaddr; + void *vaddr_unaligned; dma_addr_t paddr; int ret; @@ -1050,49 +1050,40 @@ int ath11k_peer_rx_tid_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id, else hw_desc_sz = ath11k_hal_reo_qdesc_size(DP_BA_WIN_SZ_MAX, tid); - vaddr = kzalloc(hw_desc_sz + HAL_LINK_DESC_ALIGN - 1, GFP_ATOMIC); - if (!vaddr) { + rx_tid->unaligned_size = hw_desc_sz + HAL_LINK_DESC_ALIGN - 1; + vaddr_unaligned = dma_alloc_noncoherent(ab->dev, rx_tid->unaligned_size, &paddr, + DMA_BIDIRECTIONAL, GFP_ATOMIC); + if (!vaddr_unaligned) { spin_unlock_bh(&ab->base_lock); return -ENOMEM; } - addr_aligned = PTR_ALIGN(vaddr, HAL_LINK_DESC_ALIGN); - - ath11k_hal_reo_qdesc_setup(addr_aligned, tid, ba_win_sz, - ssn, pn_type); - - paddr = dma_map_single(ab->dev, addr_aligned, hw_desc_sz, - DMA_BIDIRECTIONAL); - - ret = dma_mapping_error(ab->dev, paddr); - if (ret) { - spin_unlock_bh(&ab->base_lock); - ath11k_warn(ab, "failed to setup dma map for peer %pM rx tid %d: %d\n", - peer_mac, tid, ret); - goto err_mem_free; - } - - rx_tid->vaddr = vaddr; - rx_tid->paddr = paddr; + rx_tid->vaddr_unaligned = vaddr_unaligned; + vaddr = PTR_ALIGN(vaddr_unaligned, HAL_LINK_DESC_ALIGN); + rx_tid->paddr_unaligned = paddr; + rx_tid->paddr = rx_tid->paddr_unaligned + ((unsigned long)vaddr - + (unsigned long)rx_tid->vaddr_unaligned); + ath11k_hal_reo_qdesc_setup(vaddr, tid, ba_win_sz, ssn, pn_type); rx_tid->size = hw_desc_sz; rx_tid->active = true; + /* After dma_alloc_noncoherent, vaddr is being modified for reo qdesc setup. + * Since these changes are not reflected in the device, driver now needs to + * explicitly call dma_sync_single_for_device. + */ + dma_sync_single_for_device(ab->dev, rx_tid->paddr, + rx_tid->size, + DMA_TO_DEVICE); spin_unlock_bh(&ab->base_lock); - ret = ath11k_wmi_peer_rx_reorder_queue_setup(ar, vdev_id, peer_mac, - paddr, tid, 1, ba_win_sz); + ret = ath11k_wmi_peer_rx_reorder_queue_setup(ar, vdev_id, peer_mac, rx_tid->paddr, + tid, 1, ba_win_sz); if (ret) { ath11k_warn(ar->ab, "failed to setup rx reorder queue for peer %pM tid %d: %d\n", peer_mac, tid, ret); ath11k_dp_rx_tid_mem_free(ab, peer_mac, vdev_id, tid); } - return ret; - -err_mem_free: - kfree(rx_tid->vaddr); - rx_tid->vaddr = NULL; - return ret; } -- 2.53.0