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Commit 6d5bbed3 authored by Shawn Lin's avatar Shawn Lin Committed by Vinod Koul
Browse files

dmaengine: core: expose max burst capability to clients 



This patch add max_burst to dma_get_slave_caps for clients
to get the burst capability of slave dma controller.

Signed-off-by: default avatarShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: default avatarCaesar Wang <wxt@rock-chips.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 271e1b86

drivers/dma/dmaengine.c

+1 −0
Original line number Diff line number Diff line
@@ -496,6 +496,7 @@ int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_caps *caps) 
	caps->src_addr_widths = device->src_addr_widths;

	caps->dst_addr_widths = device->dst_addr_widths;

	caps->directions = device->directions;

	caps->max_burst = device->max_burst;

	caps->residue_granularity = device->residue_granularity;

	caps->descriptor_reuse = device->descriptor_reuse;

include/linux/dmaengine.h

+4 −0
Original line number Diff line number Diff line
@@ -401,6 +401,7 @@ enum dma_residue_granularity { 
 * 	since the enum dma_transfer_direction is not defined as bits for each

 * 	type of direction, the dma controller should fill (1 << <TYPE>) and same

 * 	should be checked by controller as well

 * @max_burst: max burst capability per-transfer

 * @cmd_pause: true, if pause and thereby resume is supported

 * @cmd_terminate: true, if terminate cmd is supported

 * @residue_granularity: granularity of the reported transfer residue
@@ -411,6 +412,7 @@ struct dma_slave_caps { 
	u32 src_addr_widths;

	u32 dst_addr_widths;

	u32 directions;

	u32 max_burst;

	bool cmd_pause;

	bool cmd_terminate;

	enum dma_residue_granularity residue_granularity;
@@ -654,6 +656,7 @@ struct dma_filter { 
 * 	the enum dma_transfer_direction is not defined as bits for

 * 	each type of direction, the dma controller should fill (1 <<

 * 	<TYPE>) and same should be checked by controller as well

 * @max_burst: max burst capability per-transfer

 * @residue_granularity: granularity of the transfer residue reported

 *	by tx_status

 * @device_alloc_chan_resources: allocate resources and return the
@@ -712,6 +715,7 @@ struct dma_device { 
	u32 src_addr_widths;

	u32 dst_addr_widths;

	u32 directions;

	u32 max_burst;

	bool descriptor_reuse;

	enum dma_residue_granularity residue_granularity;