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Message-Id: <20260114-dma_common_config-v1-1-64feb836ff04@nxp.com>
Date: Wed, 14 Jan 2026 12:12:42 -0500
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>
Cc: dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
Frank Li <Frank.Li@....com>
Subject: [PATCH 1/6] dmaengine: Move struct dma_chan after struct
dma_slave_config
Move struct dma_chan below struct dma_slave_config to prepare for adding
common dma_slave_config field.
No functional change.
Signed-off-by: Frank Li <Frank.Li@....com>
---
include/linux/dmaengine.h | 120 +++++++++++++++++++++++-----------------------
1 file changed, 60 insertions(+), 60 deletions(-)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 99efe2b9b4ea9844ca6161208362ef18ef111d96..01d3e44e3cb426d9ad085eda1bc562ca7d266cb0 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -316,66 +316,6 @@ struct dma_router {
void (*route_free)(struct device *dev, void *route_data);
};
-/**
- * struct dma_chan - devices supply DMA channels, clients use them
- * @device: ptr to the dma device who supplies this channel, always !%NULL
- * @slave: ptr to the device using this channel
- * @cookie: last cookie value returned to client
- * @completed_cookie: last completed cookie for this channel
- * @chan_id: channel ID for sysfs
- * @dev: class device for sysfs
- * @name: backlink name for sysfs
- * @dbg_client_name: slave name for debugfs in format:
- * dev_name(requester's dev):channel name, for example: "2b00000.mcasp:tx"
- * @device_node: used to add this to the device chan list
- * @local: per-cpu pointer to a struct dma_chan_percpu
- * @client_count: how many clients are using this channel
- * @table_count: number of appearances in the mem-to-mem allocation table
- * @router: pointer to the DMA router structure
- * @route_data: channel specific data for the router
- * @private: private data for certain client-channel associations
- */
-struct dma_chan {
- struct dma_device *device;
- struct device *slave;
- dma_cookie_t cookie;
- dma_cookie_t completed_cookie;
-
- /* sysfs */
- int chan_id;
- struct dma_chan_dev *dev;
- const char *name;
-#ifdef CONFIG_DEBUG_FS
- char *dbg_client_name;
-#endif
-
- struct list_head device_node;
- struct dma_chan_percpu __percpu *local;
- int client_count;
- int table_count;
-
- /* DMA router */
- struct dma_router *router;
- void *route_data;
-
- void *private;
-};
-
-/**
- * struct dma_chan_dev - relate sysfs device node to backing channel device
- * @chan: driver channel device
- * @device: sysfs device
- * @dev_id: parent dma_device dev_id
- * @chan_dma_dev: The channel is using custom/different dma-mapping
- * compared to the parent dma_device
- */
-struct dma_chan_dev {
- struct dma_chan *chan;
- struct device device;
- int dev_id;
- bool chan_dma_dev;
-};
-
/**
* enum dma_slave_buswidth - defines bus width of the DMA slave
* device, source or target buses
@@ -459,6 +399,66 @@ struct dma_slave_config {
size_t peripheral_size;
};
+/**
+ * struct dma_chan - devices supply DMA channels, clients use them
+ * @device: ptr to the dma device who supplies this channel, always !%NULL
+ * @slave: ptr to the device using this channel
+ * @cookie: last cookie value returned to client
+ * @completed_cookie: last completed cookie for this channel
+ * @chan_id: channel ID for sysfs
+ * @dev: class device for sysfs
+ * @name: backlink name for sysfs
+ * @dbg_client_name: slave name for debugfs in format:
+ * dev_name(requester's dev):channel name, for example: "2b00000.mcasp:tx"
+ * @device_node: used to add this to the device chan list
+ * @local: per-cpu pointer to a struct dma_chan_percpu
+ * @client_count: how many clients are using this channel
+ * @table_count: number of appearances in the mem-to-mem allocation table
+ * @router: pointer to the DMA router structure
+ * @route_data: channel specific data for the router
+ * @private: private data for certain client-channel associations
+ */
+struct dma_chan {
+ struct dma_device *device;
+ struct device *slave;
+ dma_cookie_t cookie;
+ dma_cookie_t completed_cookie;
+
+ /* sysfs */
+ int chan_id;
+ struct dma_chan_dev *dev;
+ const char *name;
+#ifdef CONFIG_DEBUG_FS
+ char *dbg_client_name;
+#endif
+
+ struct list_head device_node;
+ struct dma_chan_percpu __percpu *local;
+ int client_count;
+ int table_count;
+
+ /* DMA router */
+ struct dma_router *router;
+ void *route_data;
+
+ void *private;
+};
+
+/**
+ * struct dma_chan_dev - relate sysfs device node to backing channel device
+ * @chan: driver channel device
+ * @device: sysfs device
+ * @dev_id: parent dma_device dev_id
+ * @chan_dma_dev: The channel is using custom/different dma-mapping
+ * compared to the parent dma_device
+ */
+struct dma_chan_dev {
+ struct dma_chan *chan;
+ struct device device;
+ int dev_id;
+ bool chan_dma_dev;
+};
+
/**
* enum dma_residue_granularity - Granularity of the reported transfer residue
* @DMA_RESIDUE_GRANULARITY_DESCRIPTOR: Residue reporting is not support. The
--
2.34.1
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