From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Rob Herring <robh+dt@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
Matthias Brugger <matthias.bgg@gmail.com>,
John Crispin <john@phrozen.org>,
Sean Wang <sean.wang@mediatek.com>,
Mark Lee <Mark-MC.Lee@mediatek.com>,
Jakub Kicinski <kuba@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Fabien Parent <fparent@baylibre.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Edwin Peer <edwin.peer@broadcom.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
Stephane Le Provost <stephane.leprovost@mediatek.com>,
Pedro Tsai <pedro.tsai@mediatek.com>,
Andrew Perepech <andrew.perepech@mediatek.com>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v2 05/14] net: core: provide priv_to_netdev()
Date: Mon, 11 May 2020 17:07:50 +0200 [thread overview]
Message-ID: <20200511150759.18766-6-brgl@bgdev.pl> (raw)
In-Reply-To: <20200511150759.18766-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Appropriate amount of extra memory for private data is allocated at
the end of struct net_device. We have a helper - netdev_priv() - that
returns its address but we don't have the reverse: a function which
given the address of the private data, returns the address of struct
net_device.
This has caused many drivers to store the pointer to net_device in
the private data structure, which basically means storing the pointer
to a structure in this very structure.
This patch proposes to add priv_to_netdev() - a helper which converts
the address of the private data to the address of the associated
net_device.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
include/linux/netdevice.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 130a668049ab..933c6808a87f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2249,6 +2249,18 @@ static inline void *netdev_priv(const struct net_device *dev)
return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
}
+/**
+ * priv_to_netdev - get the net_device from private data
+ * @priv: net_device private data
+ *
+ * Get the address of network device associated with this private data.
+ */
+static inline struct net_device *priv_to_netdev(void *priv)
+{
+ priv = (char *)priv - ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
+ return (struct net_device *)priv;
+}
+
/* Set the sysfs physical device reference for the network logical device
* if set prior to registration will cause a symlink during initialization.
*/
--
2.25.0
WARNING: multiple messages have this Message-ID (diff)
From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Rob Herring <robh+dt@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
Matthias Brugger <matthias.bgg@gmail.com>,
John Crispin <john@phrozen.org>,
Sean Wang <sean.wang@mediatek.com>,
Mark Lee <Mark-MC.Lee@mediatek.com>,
Jakub Kicinski <kuba@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Fabien Parent <fparent@baylibre.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Edwin Peer <edwin.peer@broadcom.com>
Cc: devicetree@vger.kernel.org,
Stephane Le Provost <stephane.leprovost@mediatek.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
linux-mediatek@lists.infradead.org,
Andrew Perepech <andrew.perepech@mediatek.com>,
Pedro Tsai <pedro.tsai@mediatek.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 05/14] net: core: provide priv_to_netdev()
Date: Mon, 11 May 2020 17:07:50 +0200 [thread overview]
Message-ID: <20200511150759.18766-6-brgl@bgdev.pl> (raw)
In-Reply-To: <20200511150759.18766-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Appropriate amount of extra memory for private data is allocated at
the end of struct net_device. We have a helper - netdev_priv() - that
returns its address but we don't have the reverse: a function which
given the address of the private data, returns the address of struct
net_device.
This has caused many drivers to store the pointer to net_device in
the private data structure, which basically means storing the pointer
to a structure in this very structure.
This patch proposes to add priv_to_netdev() - a helper which converts
the address of the private data to the address of the associated
net_device.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
include/linux/netdevice.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 130a668049ab..933c6808a87f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2249,6 +2249,18 @@ static inline void *netdev_priv(const struct net_device *dev)
return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
}
+/**
+ * priv_to_netdev - get the net_device from private data
+ * @priv: net_device private data
+ *
+ * Get the address of network device associated with this private data.
+ */
+static inline struct net_device *priv_to_netdev(void *priv)
+{
+ priv = (char *)priv - ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
+ return (struct net_device *)priv;
+}
+
/* Set the sysfs physical device reference for the network logical device
* if set prior to registration will cause a symlink during initialization.
*/
--
2.25.0
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek
WARNING: multiple messages have this Message-ID (diff)
From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Rob Herring <robh+dt@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
Matthias Brugger <matthias.bgg@gmail.com>,
John Crispin <john@phrozen.org>,
Sean Wang <sean.wang@mediatek.com>,
Mark Lee <Mark-MC.Lee@mediatek.com>,
Jakub Kicinski <kuba@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Fabien Parent <fparent@baylibre.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Edwin Peer <edwin.peer@broadcom.com>
Cc: devicetree@vger.kernel.org,
Stephane Le Provost <stephane.leprovost@mediatek.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
linux-mediatek@lists.infradead.org,
Andrew Perepech <andrew.perepech@mediatek.com>,
Pedro Tsai <pedro.tsai@mediatek.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 05/14] net: core: provide priv_to_netdev()
Date: Mon, 11 May 2020 17:07:50 +0200 [thread overview]
Message-ID: <20200511150759.18766-6-brgl@bgdev.pl> (raw)
In-Reply-To: <20200511150759.18766-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Appropriate amount of extra memory for private data is allocated at
the end of struct net_device. We have a helper - netdev_priv() - that
returns its address but we don't have the reverse: a function which
given the address of the private data, returns the address of struct
net_device.
This has caused many drivers to store the pointer to net_device in
the private data structure, which basically means storing the pointer
to a structure in this very structure.
This patch proposes to add priv_to_netdev() - a helper which converts
the address of the private data to the address of the associated
net_device.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
include/linux/netdevice.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 130a668049ab..933c6808a87f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2249,6 +2249,18 @@ static inline void *netdev_priv(const struct net_device *dev)
return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
}
+/**
+ * priv_to_netdev - get the net_device from private data
+ * @priv: net_device private data
+ *
+ * Get the address of network device associated with this private data.
+ */
+static inline struct net_device *priv_to_netdev(void *priv)
+{
+ priv = (char *)priv - ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
+ return (struct net_device *)priv;
+}
+
/* Set the sysfs physical device reference for the network logical device
* if set prior to registration will cause a symlink during initialization.
*/
--
2.25.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-05-11 15:08 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-11 15:07 [PATCH v2 00/14] mediatek: add support for MediaTek Ethernet MAC Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 01/14] dt-bindings: arm: add a binding document for MediaTek PERICFG controller Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-19 18:28 ` Rob Herring
2020-05-19 18:28 ` Rob Herring
2020-05-19 18:28 ` Rob Herring
2020-05-20 9:19 ` Bartosz Golaszewski
2020-05-20 9:19 ` Bartosz Golaszewski
2020-05-20 9:19 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 02/14] dt-bindings: net: add a binding document for MediaTek Ethernet MAC Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 03/14] net: ethernet: mediatek: rename Kconfig prompt Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 04/14] net: ethernet: mediatek: remove unnecessary spaces from Makefile Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski [this message]
2020-05-11 15:07 ` [PATCH v2 05/14] net: core: provide priv_to_netdev() Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 16:39 ` Andrew Lunn
2020-05-11 16:39 ` Andrew Lunn
2020-05-11 16:39 ` Andrew Lunn
2020-05-11 20:41 ` David Miller
2020-05-11 20:41 ` David Miller
2020-05-11 20:41 ` David Miller
2020-05-12 6:04 ` Bartosz Golaszewski
2020-05-12 6:04 ` Bartosz Golaszewski
2020-05-12 6:04 ` Bartosz Golaszewski
2020-05-12 19:30 ` David Miller
2020-05-12 19:30 ` David Miller
2020-05-12 19:30 ` David Miller
2020-05-11 15:07 ` [PATCH v2 06/14] net: move devres helpers into a separate source file Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 07/14] net: devres: define a separate devres structure for devm_alloc_etherdev() Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 08/14] net: devres: provide devm_register_netdev() Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 09/14] net: ethernet: mtk-eth-mac: new driver Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 19:24 ` Florian Fainelli
2020-05-11 19:24 ` Florian Fainelli
2020-05-11 19:24 ` Florian Fainelli
2020-05-12 6:35 ` Bartosz Golaszewski
2020-05-12 6:35 ` Bartosz Golaszewski
2020-05-12 6:35 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 10/14] ARM64: dts: mediatek: add pericfg syscon to mt8516.dtsi Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 11/14] ARM64: dts: mediatek: add the ethernet node " Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 12/14] ARM64: dts: mediatek: add an alias for ethernet0 for pumpkin boards Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 13/14] ARM64: dts: mediatek: add ethernet pins " Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` [PATCH v2 14/14] ARM64: dts: mediatek: enable ethernet on " Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
2020-05-11 15:07 ` Bartosz Golaszewski
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