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BACKPORT: dmaengine: core: expose max burst capability to clients

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

Conflicts:
	include/linux/dmaengine.h

Change-Id: I7ffcf775ad48247ee0bfa9e18c8ee3b4b256eab2
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
(cherry picked from commit 6d5bbed30f)
This commit is contained in:
Shawn Lin 2016-01-22 19:06:50 +08:00 committed by Caesar Wang
parent 113b372882
commit 943445cb2b
2 changed files with 5 additions and 0 deletions
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1
drivers/dma/dmaengine.c
View File

@ -492,6 +492,7 @@ 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;
/*

4
include/linux/dmaengine.h
View File

@ -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;
@ -627,6 +629,7 @@ enum dmaengine_alignment {
* 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
@ -681,6 +684,7 @@ struct dma_device {
u32 src_addr_widths;
u32 dst_addr_widths;
u32 directions;
u32 max_burst;
enum dma_residue_granularity residue_granularity;
int (*device_alloc_chan_resources)(struct dma_chan *chan);