From patchwork Fri Jun 14 11:52:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Breno Leitao X-Patchwork-Id: 13698638 X-Patchwork-Delegate: nbd@nbd.name Received: from mail-ed1-f45.google.com (mail-ed1-f45.google.com [209.85.208.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 549D814D29B; Fri, 14 Jun 2024 11:55:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718366107; cv=none; b=TUCbj0mEnj/BQVvsj9U0MkWam7Fc0FA08o+r606I6C32I+3DrR3jY1JbwBkzg2w8CPY2NGYF1z0hPzo8y9uBA5lDTJX5WIytTUEpcXa5UyFbu5B0p4tJzmS0H99dzUqKlRCIDT/i+UIQrRu11zZSIjNdlfiw/GTPNwfV9sLZUFY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718366107; c=relaxed/simple; bh=IgYl4TaWzLNfd0vfqkiTp8kN4qlpKAD1hY7bmvXK82s=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=O5jIXvNbSBcmgmP6YTlMvKat4K9JsVvlc8SKN9DRr8H6pJLcR1TXRWac4o7Awfyulwuwf3BzzrcHmH5Sv5LF8kvIQhTo4I7TsUuA/CPfxaqKZ2dP5bZWtBQvmOijUyGNWui22tE+ePau2VaMa6rPiIhSCHct1VMuGb1MZIdBQA4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.208.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-ed1-f45.google.com with SMTP id 4fb4d7f45d1cf-57c83100c5fso2201633a12.3; Fri, 14 Jun 2024 04:55:05 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718366104; x=1718970904; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=j41Weqp75RphGFqrj1Kspbcz878tK8UuoQ8p5OS9G6Y=; b=iqyiOpq3yf+eRYmBljDDsF6mn27GNzHfr7/ZivtRKSiDRzqfr5j6jJor/AcSRxgWSx 46EgzZZ+syLtRfLYzXdp6ARONc//Byx0hnte9URkZjAFk7CI3FsyGJg1n+wIIY5jGTAw Vctczey+QtP776cl05w/SxL4eHtgkZqmks4C8Qi4fB++rSqxWTB4/NhIgc51h0NmCCT5 43Zsiv4ecYv2JR9i3feoHVd04gEPTrkxA45XA4/DycFpZgBdQBVttoEbIu0yDw2lmO31 AzhbZI+ryCVev3Q3GG5A0zsA/J39Ot1LZwwM15279D/VbJ/2/ztaScxe/SnPP45W79IF 3izg== X-Forwarded-Encrypted: i=1; AJvYcCX6XO8Ad7Zsb87w5Xs9ZYnfEg2nK6p3KZNNIXQAs5LWygp+6rjcsPmdbre+eXyjz4WtdFkSm3ruDp6lWbfCe+sj5etVdv6QGMFIYUkebezxpTwlTb3GZ05W0wSBKFdCsiwnEy8d25Zr3/QP9Xs= X-Gm-Message-State: AOJu0Yy4BiH920AlE4Ta8Oo+fxgggc0zndD21r8NOxwv9VP/0VBQ4Ri3 L3o/6hr0r2VWnBIizSjs2Hly0zXlWn7oveqWCpnUg3B9b4alfK1Z X-Google-Smtp-Source: AGHT+IGDv+rRVYXWIZxDXGLLU+IncjYEVdIVPKRohIoNGMvyTkPIIyHCi73g3GoJ8mJ678jlzTSVRw== X-Received: by 2002:a17:906:6c9a:b0:a6e:57ff:7700 with SMTP id a640c23a62f3a-a6f60d421aamr138247566b.42.1718366103309; Fri, 14 Jun 2024 04:55:03 -0700 (PDT) Received: from localhost (fwdproxy-lla-000.fbsv.net. [2a03:2880:30ff::face:b00c]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a6f56da3fe5sm181083866b.18.2024.06.14.04.55.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Jun 2024 04:55:02 -0700 (PDT) From: Breno Leitao To: kvalo@kernel.org, linux-wireless@vger.kernel.org, Felix Fietkau , Lorenzo Bianconi , Ryder Lee , Shayne Chen , Sean Wang , Matthias Brugger , AngeloGioacchino Del Regno Cc: netdev@vger.kernel.org, horms@kernel.org, kees@kernel.org, kuba@kernel.org, Bo Jiao , Daniel Golle , Alexander Couzens , Deren Wu , Ming Yen Hsieh , Leon Yen , Quan Zhou , Ingo Rohloff , Sujuan Chen , StanleyYP Wang , Benjamin Lin , Peter Chiu , linux-kernel@vger.kernel.org (open list:ARM/Mediatek SoC support), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support) Subject: [PATCH] wifi: mt76: un-embedd netdev from mt76_dev Date: Fri, 14 Jun 2024 04:52:42 -0700 Message-ID: <20240614115317.657700-1-leitao@debian.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Embedding net_device into structures prohibits the usage of flexible arrays in the net_device structure. For more details, see the discussion at [1]. Un-embed the net_devices from struct mt76_dev by converting them into pointers, and allocating them dynamically. Use the leverage alloc_netdev_dummy() to allocate the net_device object at mt76_dma_init(). The free of the device occurs at mt76_dma_cleanup(). Link: https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/ [1] Signed-off-by: Breno Leitao Reviewed-by: Simon Horman --- PS: Due to the lack of hardware, this patch was not tested on a real hardware, unfortunately. PS2: this is the last driver that is still using embedded netdevices. drivers/net/wireless/mediatek/mt76/debugfs.c | 6 ++-- drivers/net/wireless/mediatek/mt76/dma.c | 31 +++++++++++++++---- drivers/net/wireless/mediatek/mt76/dma.h | 5 +++ drivers/net/wireless/mediatek/mt76/mt76.h | 4 +-- .../net/wireless/mediatek/mt76/mt7603/dma.c | 2 +- .../net/wireless/mediatek/mt76/mt7615/dma.c | 6 ++-- .../net/wireless/mediatek/mt76/mt76x02_mmio.c | 2 +- .../net/wireless/mediatek/mt76/mt7915/dma.c | 2 +- .../net/wireless/mediatek/mt76/mt7921/pci.c | 2 +- .../net/wireless/mediatek/mt76/mt7925/pci.c | 2 +- .../net/wireless/mediatek/mt76/mt792x_dma.c | 2 +- .../net/wireless/mediatek/mt76/mt7996/dma.c | 2 +- 12 files changed, 45 insertions(+), 21 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/debugfs.c b/drivers/net/wireless/mediatek/mt76/debugfs.c index ae83be572b94..b6a2746c187d 100644 --- a/drivers/net/wireless/mediatek/mt76/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/debugfs.c @@ -33,8 +33,8 @@ mt76_napi_threaded_set(void *data, u64 val) if (!mt76_is_mmio(dev)) return -EOPNOTSUPP; - if (dev->napi_dev.threaded != val) - return dev_set_threaded(&dev->napi_dev, val); + if (dev->napi_dev->threaded != val) + return dev_set_threaded(dev->napi_dev, val); return 0; } @@ -44,7 +44,7 @@ mt76_napi_threaded_get(void *data, u64 *val) { struct mt76_dev *dev = data; - *val = dev->napi_dev.threaded; + *val = dev->napi_dev->threaded; return 0; } diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index f4f88c444e21..bf67b1f2348a 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -916,7 +916,7 @@ int mt76_dma_rx_poll(struct napi_struct *napi, int budget) struct mt76_dev *dev; int qid, done = 0, cur; - dev = container_of(napi->dev, struct mt76_dev, napi_dev); + dev = mt76_from_netdev(napi->dev); qid = napi - dev->napi; rcu_read_lock(); @@ -940,18 +940,35 @@ static int mt76_dma_init(struct mt76_dev *dev, int (*poll)(struct napi_struct *napi, int budget)) { + struct mt76_dev **priv; int i; - init_dummy_netdev(&dev->napi_dev); - init_dummy_netdev(&dev->tx_napi_dev); - snprintf(dev->napi_dev.name, sizeof(dev->napi_dev.name), "%s", + dev->napi_dev = alloc_netdev_dummy(sizeof(struct mt76_dev *)); + if (!dev->napi_dev) + return -ENOMEM; + + /* napi_dev private data points to mt76_dev parent, so, mt76_dev + * can be retrieved given napi_dev + */ + priv = netdev_priv(dev->napi_dev); + *priv = dev; + + dev->tx_napi_dev = alloc_netdev_dummy(sizeof(struct mt76_dev *)); + if (!dev->tx_napi_dev) { + free_netdev(dev->napi_dev); + return -ENOMEM; + } + priv = netdev_priv(dev->tx_napi_dev); + *priv = dev; + + snprintf(dev->napi_dev->name, sizeof(dev->napi_dev->name), "%s", wiphy_name(dev->hw->wiphy)); - dev->napi_dev.threaded = 1; + dev->napi_dev->threaded = 1; init_completion(&dev->mmio.wed_reset); init_completion(&dev->mmio.wed_reset_complete); mt76_for_each_q_rx(dev, i) { - netif_napi_add(&dev->napi_dev, &dev->napi[i], poll); + netif_napi_add(dev->napi_dev, &dev->napi[i], poll); mt76_dma_rx_fill(dev, &dev->q_rx[i], false); napi_enable(&dev->napi[i]); } @@ -1019,5 +1036,7 @@ void mt76_dma_cleanup(struct mt76_dev *dev) mt76_free_pending_txwi(dev); mt76_free_pending_rxwi(dev); + free_netdev(dev->napi_dev); + free_netdev(dev->tx_napi_dev); } EXPORT_SYMBOL_GPL(mt76_dma_cleanup); diff --git a/drivers/net/wireless/mediatek/mt76/dma.h b/drivers/net/wireless/mediatek/mt76/dma.h index 1de5a2b20f74..6454a5eca13e 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.h +++ b/drivers/net/wireless/mediatek/mt76/dma.h @@ -116,4 +116,9 @@ mt76_dma_should_drop_buf(bool *drop, u32 ctrl, u32 buf1, u32 info) } } +static inline struct mt76_dev *mt76_from_netdev(struct net_device *dev) +{ + return *(struct mt76_dev **)netdev_priv(dev); +} + #endif diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index 11b9f22ca7f3..15f83b5adac7 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -831,8 +831,8 @@ struct mt76_dev { struct mt76_mcu mcu; - struct net_device napi_dev; - struct net_device tx_napi_dev; + struct net_device *napi_dev; + struct net_device *tx_napi_dev; spinlock_t rx_lock; struct napi_struct napi[__MT_RXQ_MAX]; struct sk_buff_head rx_skb[__MT_RXQ_MAX]; diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/dma.c b/drivers/net/wireless/mediatek/mt76/mt7603/dma.c index 14304b063715..ea017f22fff2 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7603/dma.c +++ b/drivers/net/wireless/mediatek/mt76/mt7603/dma.c @@ -242,7 +242,7 @@ int mt7603_dma_init(struct mt7603_dev *dev) if (ret) return ret; - netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, + netif_napi_add_tx(dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, mt7603_poll_tx); napi_enable(&dev->mt76.tx_napi); diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c index e7135b2f1742..966e3d2c295f 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c @@ -67,7 +67,7 @@ static int mt7615_poll_tx(struct napi_struct *napi, int budget) { struct mt7615_dev *dev; - dev = container_of(napi, struct mt7615_dev, mt76.tx_napi); + dev = (struct mt7615_dev *)mt76_from_netdev(napi->dev); if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) { napi_complete(napi); queue_work(dev->mt76.wq, &dev->pm.wake_work); @@ -89,7 +89,7 @@ static int mt7615_poll_rx(struct napi_struct *napi, int budget) struct mt7615_dev *dev; int done; - dev = container_of(napi->dev, struct mt7615_dev, mt76.napi_dev); + dev = (struct mt7615_dev *)mt76_from_netdev(napi->dev); if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) { napi_complete(napi); @@ -282,7 +282,7 @@ int mt7615_dma_init(struct mt7615_dev *dev) if (ret < 0) return ret; - netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, + netif_napi_add_tx(dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, mt7615_poll_tx); napi_enable(&dev->mt76.tx_napi); diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c index e5ad635d3c56..35b7ebc2c9c6 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c @@ -239,7 +239,7 @@ int mt76x02_dma_init(struct mt76x02_dev *dev) if (ret) return ret; - netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, + netif_napi_add_tx(dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, mt76x02_poll_tx); napi_enable(&dev->mt76.tx_napi); diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/dma.c b/drivers/net/wireless/mediatek/mt76/mt7915/dma.c index 0baa82c8df5a..0c62272fe7d0 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/dma.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/dma.c @@ -578,7 +578,7 @@ int mt7915_dma_init(struct mt7915_dev *dev, struct mt7915_phy *phy2) if (ret < 0) return ret; - netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, + netif_napi_add_tx(dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, mt7915_poll_tx); napi_enable(&dev->mt76.tx_napi); diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c index f768e9389ac6..e75e7b6d3aaf 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c @@ -219,7 +219,7 @@ static int mt7921_dma_init(struct mt792x_dev *dev) if (ret < 0) return ret; - netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, + netif_napi_add_tx(dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, mt792x_poll_tx); napi_enable(&dev->mt76.tx_napi); diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c index 07b74d492ce1..577574fb7a1e 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c @@ -254,7 +254,7 @@ static int mt7925_dma_init(struct mt792x_dev *dev) if (ret < 0) return ret; - netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, + netif_napi_add_tx(dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, mt792x_poll_tx); napi_enable(&dev->mt76.tx_napi); diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_dma.c b/drivers/net/wireless/mediatek/mt76/mt792x_dma.c index 5cc2d59b774a..45aed1e1b1a6 100644 --- a/drivers/net/wireless/mediatek/mt76/mt792x_dma.c +++ b/drivers/net/wireless/mediatek/mt76/mt792x_dma.c @@ -340,7 +340,7 @@ int mt792x_poll_rx(struct napi_struct *napi, int budget) struct mt792x_dev *dev; int done; - dev = container_of(napi->dev, struct mt792x_dev, mt76.napi_dev); + dev = (struct mt792x_dev *)mt76_from_netdev(napi->dev); if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) { napi_complete(napi); diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/dma.c b/drivers/net/wireless/mediatek/mt76/mt7996/dma.c index 73e633d0d700..69a7d9b2e38b 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/dma.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/dma.c @@ -641,7 +641,7 @@ int mt7996_dma_init(struct mt7996_dev *dev) if (ret < 0) return ret; - netif_napi_add_tx(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, + netif_napi_add_tx(dev->mt76.tx_napi_dev, &dev->mt76.tx_napi, mt7996_poll_tx); napi_enable(&dev->mt76.tx_napi);