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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-07-12 14:39:40 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-07-14 07:46:30 +0300 |
| commit | fe364a7d95c24e07e9b3f2ab917f01d6d8330bba (patch) | |
| tree | 6a61242a541989d8c3cd78ef156cf6010610b632 /drivers/dma/dw/internal.h | |
| parent | e73f0f0ee7541171d89f2e2491130c7771ba58d3 (diff) | |
| download | linux-fe364a7d95c24e07e9b3f2ab917f01d6d8330bba.tar.xz | |
dmaengine: dw: Program xBAR hardware for Elkhart Lake
Intel Elkhart Lake PSE DMA implementation is integrated with crossbar IP
in order to serve more hardware than there are DMA request lines available.
Due to this, program xBAR hardware to make flexible support of PSE peripheral.
The Device-to-Device has not been tested and it's not supported by DMA Engine,
but it's left in the code for the sake of documenting hardware features.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210712113940.42753-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/dw/internal.h')
| -rw-r--r-- | drivers/dma/dw/internal.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/dma/dw/internal.h b/drivers/dma/dw/internal.h index 2e1c52eefdeb..563ce73488db 100644 --- a/drivers/dma/dw/internal.h +++ b/drivers/dma/dw/internal.h @@ -74,4 +74,20 @@ static __maybe_unused const struct dw_dma_chip_pdata idma32_chip_pdata = { .remove = idma32_dma_remove, }; +static const struct dw_dma_platform_data xbar_pdata = { + .nr_channels = 8, + .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, + .chan_priority = CHAN_PRIORITY_ASCENDING, + .block_size = 131071, + .nr_masters = 1, + .data_width = {4}, + .quirks = DW_DMA_QUIRK_XBAR_PRESENT, +}; + +static __maybe_unused const struct dw_dma_chip_pdata xbar_chip_pdata = { + .pdata = &xbar_pdata, + .probe = idma32_dma_probe, + .remove = idma32_dma_remove, +}; + #endif /* _DMA_DW_INTERNAL_H */ |