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DaVinci: EDMA: Adding 2 new APIs for allocating/freeing PARAMs

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For best performance, codecs often setup linked triggered
transfers with a contiguous block of params, and that is when
this API is used. Setup/configuration of these parameter RAMs
is most efficient if they are contiguous.
There is an API to allocate a set of contiguous parameter RAMs and
a corresponding API to free a set of contiguous parameter RAMs

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Sandeep Paulraj
2009-07-27 15:10:36 -04:00
committed by Kevin Hilman
parent 0c30e0d31b
commit 213765d7b4
2 changed files with 144 additions and 0 deletions
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7
arch/arm/mach-davinci/include/mach/edma.h
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@@ -226,6 +226,9 @@ enum sync_dimension {
#define EDMA_CHANNEL_ANY -1 /* for edma_alloc_channel() */
#define EDMA_SLOT_ANY -1 /* for edma_alloc_slot() */
#define EDMA_CONT_PARAMS_ANY 1001
#define EDMA_CONT_PARAMS_FIXED_EXACT 1002
#define EDMA_CONT_PARAMS_FIXED_NOT_EXACT 1003
/* alloc/free DMA channels and their dedicated parameter RAM slots */
int edma_alloc_channel(int channel,
@@ -237,6 +240,10 @@ void edma_free_channel(unsigned channel);
int edma_alloc_slot(unsigned ctlr, int slot);
void edma_free_slot(unsigned slot);
/* alloc/free a set of contiguous parameter RAM slots */
int edma_alloc_cont_slots(unsigned ctlr, unsigned int id, int slot, int count);
int edma_free_cont_slots(unsigned slot, int count);
/* calls that operate on part of a parameter RAM slot */
void edma_set_src(unsigned slot, dma_addr_t src_port,
enum address_mode mode, enum fifo_width);