From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) (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 BD48F3DF009 for ; Thu, 9 Jul 2026 07:56:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.61.82.184 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783583782; cv=none; b=oRhN/ynMGdE2uniLuB7aGDjhi26PP3vG6zEb6Xx1IT/LrkS6/C/z1WsHPLe7S7H3EKQqVMaPNMufsydU0p5DlV+GP/ngkZR9GhzWiag+ka5GuYFEyDkHmsTA6vw9f2twElf2YkM3LCiidk1THuXh3cXyEnPQ8iDRL2mpXoEzx/k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783583782; c=relaxed/simple; bh=KdV7ZNl/uIA7O9vBF9sUTQNyMVZlG0bEb0Haz7SAsO4=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=W0tSqdmJ7sBpbDkG15/Pjj1NfjtXda/DU9W3ovLGwbxDaoaybR3Zo0aC3mXKXimONzYtiol6Gdt2h7sTmay+4nF+v6EgNZe013f2QfuCJI5ZiKpEU3WltDXPXn3pWskX5iwAEGEmKjjV+JlbrfJm410wm/OXlRyAlLzI9/S4oF8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=stHWIHxD; arc=none smtp.client-ip=210.61.82.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="stHWIHxD" X-UUID: a89196f07b6b11f18dc8c9802ae25ab1-20260709 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=miRr2Vh2qV0uzgDRTJNRMD3Yv5mTPwM32SzzMgMj50I=; b=stHWIHxDZ6hmqVUNy2JgwS0egw2Wu2wPX9XUp7CnfxLC2eE/q4rimHLvvhD+cDALPI2WPfeJ8uaM5LfcmpYQWrX4DZjOj9FtGdufQJynR9EshJMTaBUunESsJ7jxOseSVMVx4c43iiCpzjxso4bQwVTdpUbna/sYTdwGMUBLK38=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.17,REQID:30a83245-d60d-4044-b308-12f88ccf2719,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:d497b38,CLOUDID:544be918-ab14-4403-9336-76696324c5a8,B ulkID:nil,BulkQuantity:0,SF:102|836|865|888|898,TC:-5,Content:0|15|50|99,E DM:-3,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS:nil,BEC:-1,COL:0,OSI:0,OSA:0, AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: a89196f07b6b11f18dc8c9802ae25ab1-20260709 Received: from mtkmbs13n1.mediatek.inc [(172.21.101.193)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1855363146; Thu, 09 Jul 2026 15:56:14 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Thu, 9 Jul 2026 15:56:13 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Thu, 9 Jul 2026 15:56:13 +0800 From: Eason Lai To: , CC: , , , , , , , , , , , , Eason Lai Subject: [PATCH 0/3] Fix TX performance degradation when IOMMU is enabled Date: Thu, 9 Jul 2026 15:55:55 +0800 Message-ID: <20260709075558.1654164-1-eason.lai@mediatek.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain From: Eason Lai This series adds a TX preallocated buffer mechanism to fix the TX performance degradation observed after enabling IOMMU. Currently this feature is only enabled on MT8196, where it has been validated. Eason Lai (3): wifi: mt76: Separate skb and page_pool_buf pointers in mt76_txwi_cache wifi: mt76: mt792x: Add TX page pool support for IOMMU-enabled systems wifi: mt76: mt792x: Restrict TX page pool to MT8196 platform drivers/net/wireless/mediatek/mt76/dma.c | 55 ++- drivers/net/wireless/mediatek/mt76/mt76.h | 15 +- .../wireless/mediatek/mt76/mt76_connac_mac.c | 6 + .../net/wireless/mediatek/mt76/mt7925/pci.c | 4 +- drivers/net/wireless/mediatek/mt76/mt792x.h | 2 + .../net/wireless/mediatek/mt76/mt792x_dma.c | 330 ++++++++++++++++++ .../net/wireless/mediatek/mt76/mt7996/mac.c | 10 +- drivers/net/wireless/mediatek/mt76/tx.c | 2 +- drivers/net/wireless/mediatek/mt76/wed.c | 6 +- 9 files changed, 398 insertions(+), 32 deletions(-) -- 2.45.2