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

[firefly-linux-kernel-4.4.55.git] / include / linux / dmaengine.h

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index c47c68e535e8d1cc87d2f3d4da7319ebdced2d71..965492391b6a565126cc38fbf2dc0880a4acd39a 100644 (file)
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -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);