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Commit 24ca312d authored by Robin Gong's avatar Robin Gong Committed by Vinod Koul
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dmaengine: imx-sdma: add missing structure description 



Some member description or colons missing cause build warning with
'W=1' as below:

drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'vd' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'num_bd' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'bd_phys' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'buf_tail' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'buf_ptail' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'period_len' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'chn_real_count' not described in 'sdma_desc'
drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'chn_count' not described in 'sdma_desc

Signed-off-by: default avatarRobin Gong <yibin.gong@nxp.com>
Reported-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent ad78b000

drivers/dma/imx-sdma.c

+57 −28
Original line number Diff line number Diff line
@@ -202,9 +202,9 @@ struct sdma_buffer_descriptor { 
/**

 * struct sdma_channel_control - Channel control Block

 *

 * @current_bd_ptr	current buffer descriptor processed

 * @base_bd_ptr		first element of buffer descriptor array

 * @unused		padding. The SDMA engine expects an array of 128 byte

 * @current_bd_ptr:	current buffer descriptor processed

 * @base_bd_ptr:	first element of buffer descriptor array

 * @unused:		padding. The SDMA engine expects an array of 128 byte

 *			control blocks

 */

struct sdma_channel_control {
@@ -217,10 +217,13 @@ struct sdma_channel_control { 
 * struct sdma_state_registers - SDMA context for a channel

 *

 * @pc:		program counter

 * @unused1:	unused

 * @t:		test bit: status of arithmetic & test instruction

 * @rpc:	return program counter

 * @unused0:	unused

 * @sf:		source fault while loading data

 * @spc:	loop start program counter

 * @unused2:	unused

 * @df:		destination fault while storing data

 * @epc:	loop end program counter

 * @lm:		loop mode
@@ -258,6 +261,14 @@ struct sdma_state_registers { 
 * @dsa:		dedicated core source address register

 * @ds:			dedicated core status register

 * @dd:			dedicated core data register

 * @scratch0:		1st word of dedicated ram for context switch

 * @scratch1:		2nd word of dedicated ram for context switch

 * @scratch2:		3rd word of dedicated ram for context switch

 * @scratch3:		4th word of dedicated ram for context switch

 * @scratch4:		5th word of dedicated ram for context switch

 * @scratch5:		6th word of dedicated ram for context switch

 * @scratch6:		7th word of dedicated ram for context switch

 * @scratch7:		8th word of dedicated ram for context switch

 */

struct sdma_context_data {

	struct sdma_state_registers  channel_state;
@@ -291,15 +302,16 @@ struct sdma_engine; 


/**

 * struct sdma_desc - descriptor structor for one transfer

 * @vd			descriptor for virt dma

 * @num_bd		max NUM_BD. number of descriptors currently handling

 * @buf_tail		ID of the buffer that was processed

 * @buf_ptail		ID of the previous buffer that was processed

 * @period_len		period length, used in cyclic.

 * @chn_real_count	the real count updated from bd->mode.count

 * @chn_count		the transfer count set

 * @sdmac		sdma_channel pointer

 * @bd			pointer of allocate bd

 * @vd:			descriptor for virt dma

 * @num_bd:		number of descriptors currently handling

 * @bd_phys:		physical address of bd

 * @buf_tail:		ID of the buffer that was processed

 * @buf_ptail:		ID of the previous buffer that was processed

 * @period_len:		period length, used in cyclic.

 * @chn_real_count:	the real count updated from bd->mode.count

 * @chn_count:		the transfer count set

 * @sdmac:		sdma_channel pointer

 * @bd:			pointer of allocate bd

 */

struct sdma_desc {

	struct virt_dma_desc	vd;
@@ -317,13 +329,30 @@ struct sdma_desc { 
/**

 * struct sdma_channel - housekeeping for a SDMA channel

 *

 * @sdma		pointer to the SDMA engine for this channel

 * @channel		the channel number, matches dmaengine chan_id + 1

 * @direction		transfer type. Needed for setting SDMA script

 * @peripheral_type	Peripheral type. Needed for setting SDMA script

 * @event_id0		aka dma request line

 * @event_id1		for channels that use 2 events

 * @word_size		peripheral access size

 * @vc:			virt_dma base structure

 * @desc:		sdma description including vd and other special member

 * @sdma:		pointer to the SDMA engine for this channel

 * @channel:		the channel number, matches dmaengine chan_id + 1

 * @direction:		transfer type. Needed for setting SDMA script

 * @peripheral_type:	Peripheral type. Needed for setting SDMA script

 * @event_id0:		aka dma request line

 * @event_id1:		for channels that use 2 events

 * @word_size:		peripheral access size

 * @pc_from_device:	script address for those device_2_memory

 * @pc_to_device:	script address for those memory_2_device

 * @device_to_device:	script address for those device_2_device

 * @flags:		loop mode or not

 * @per_address:	peripheral source or destination address in common case

 *                      destination address in p_2_p case

 * @per_address2:	peripheral source address in p_2_p case

 * @event_mask:		event mask used in p_2_p script

 * @watermark_level:	value for gReg[7], some script will extend it from

 *			basic watermark such as p_2_p

 * @shp_addr:		value for gReg[6]

 * @per_addr:		value for gReg[2]

 * @status:		status of dma channel

 * @data:		specific sdma interface structure

 * @bd_pool:		dma_pool for bd

 */

struct sdma_channel {

	struct virt_dma_chan		vc;
@@ -359,15 +388,15 @@ struct sdma_channel { 
/**

 * struct sdma_firmware_header - Layout of the firmware image

 *

 * @magic		"SDMA"

 * @version_major	increased whenever layout of struct sdma_script_start_addrs

 *			changes.

 * @version_minor	firmware minor version (for binary compatible changes)

 * @script_addrs_start	offset of struct sdma_script_start_addrs in this image

 * @num_script_addrs	Number of script addresses in this image

 * @ram_code_start	offset of SDMA ram image in this firmware image

 * @ram_code_size	size of SDMA ram image

 * @script_addrs	Stores the start address of the SDMA scripts

 * @magic:		"SDMA"

 * @version_major:	increased whenever layout of struct

 *			sdma_script_start_addrs changes.

 * @version_minor:	firmware minor version (for binary compatible changes)

 * @script_addrs_start:	offset of struct sdma_script_start_addrs in this image

 * @num_script_addrs:	Number of script addresses in this image

 * @ram_code_start:	offset of SDMA ram image in this firmware image

 * @ram_code_size:	size of SDMA ram image

 * @script_addrs:	Stores the start address of the SDMA scripts

 *			(in SDMA memory space)

 */

struct sdma_firmware_header {