dmaengine: Make an order in struct dma_device definition

Make an order in struct dma_device:
- added missing kernel doc descriptions
- put descriptions in the order of appearance in the code
- updated indentation where it makes sense
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230130110503.52250-1-andriy.shevchenko@linux.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

include/linux/dmaengine.h

@@ -773,6 +773,7 @@ struct dma_filter {
 
 /**
  * struct dma_device - info on the entity supplying DMA services
+ * @ref: reference is taken and put every time a channel is allocated or freed
  * @chancnt: how many DMA channels are supported
  * @privatecnt: how many DMA channels are requested by dma_request_channel
  * @channels: the list of struct dma_chan
@@ -789,6 +790,7 @@ struct dma_filter {
  * @dev_id: unique device ID
  * @dev: struct device reference for dma mapping api
  * @owner: owner module (automatically set based on the provided dev)
+ * @chan_ida: unique channel ID
  * @src_addr_widths: bit mask of src addr widths the device supports
  *	Width is specified in bytes, e.g. for a device supporting
  *	a width of 4 the mask should have BIT(4) set.
@@ -802,6 +804,7 @@ struct dma_filter {
  * @max_sg_burst: max number of SG list entries executed in a single burst
  *	DMA tansaction with no software intervention for reinitialization.
  *	Zero value means unlimited number of entries.
+ * @descriptor_reuse: a submitted transfer can be resubmitted after completion
  * @residue_granularity: granularity of the transfer residue reported
  *	by tx_status
  * @device_alloc_chan_resources: allocate resources and return the
@@ -839,7 +842,6 @@ struct dma_filter {
  *	struct with auxiliary transfer status information, otherwise the call
  *	will just return a simple status code
  * @device_issue_pending: push pending transactions to hardware
- * @descriptor_reuse: a submitted transfer can be resubmitted after completion
  * @device_release: called sometime atfer dma_async_device_unregister() is
  *     called and there are no further references to this structure. This
  *     must be implemented to free resources however many existing drivers
@@ -847,6 +849,7 @@ struct dma_filter {
  * @dbg_summary_show: optional routine to show contents in debugfs; default code
  *     will be used when this is omitted, but custom code can show extra,
  *     controller specific information.
+ * @dbg_dev_root: the root folder in debugfs for this device
  */
 struct dma_device {
 	struct kref ref;
@@ -855,7 +858,7 @@ struct dma_device {
 	struct list_head channels;
 	struct list_head global_node;
 	struct dma_filter filter;
-	dma_cap_mask_t  cap_mask;
+	dma_cap_mask_t cap_mask;
 	enum dma_desc_metadata_mode desc_metadata_modes;
 	unsigned short max_xor;
 	unsigned short max_pq;
@@ -924,10 +927,8 @@ struct dma_device {
 		struct dma_chan *chan, dma_addr_t dst, u64 data,
 		unsigned long flags);
 
-	void (*device_caps)(struct dma_chan *chan,
-			    struct dma_slave_caps *caps);
-	int (*device_config)(struct dma_chan *chan,
-			     struct dma_slave_config *config);
+	void (*device_caps)(struct dma_chan *chan, struct dma_slave_caps *caps);
+	int (*device_config)(struct dma_chan *chan, struct dma_slave_config *config);
 	int (*device_pause)(struct dma_chan *chan);
 	int (*device_resume)(struct dma_chan *chan);
 	int (*device_terminate_all)(struct dma_chan *chan);