diff options
| author |   Frank Li <Frank.Li@nxp.com> | 2022-05-24 10:21:58 -0500 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2022-06-23 14:56:34 -0500 |
| commit | d6b03171f9fc8127b3a7adfd4e74ee5d4dae5d14 (patch) | |
| tree | f0312c58ae1ca605751f44e9a3e789f79f07e626 /include/linux/dma | |
| parent | dmaengine: dw-edma: Fix eDMA Rd/Wr-channels and DMA-direction semantics (diff) | |
| download | linux-dev-d6b03171f9fc8127b3a7adfd4e74ee5d4dae5d14.tar.xz linux-dev-d6b03171f9fc8127b3a7adfd4e74ee5d4dae5d14.zip | |
dmaengine: dw-edma: Add support for chip-specific flags
Add a "flags" field to the "struct dw_edma_chip" so that the controller
drivers can pass flags that are relevant to the platform.
DW_EDMA_CHIP_LOCAL - Used by the controller drivers accessing eDMA
locally. Local eDMA access doesn't require generating MSIs to the remote.
Link: https://lore.kernel.org/r/20220524152159.2370739-8-Frank.Li@nxp.com
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-By: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'include/linux/dma')
| -rw-r--r-- | include/linux/dma/edma.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/dma/edma.h b/include/linux/dma/edma.h index fdbbeda170a9..7d8062e9c544 100644 --- a/include/linux/dma/edma.h +++ b/include/linux/dma/edma.h @@ -34,11 +34,20 @@ enum dw_edma_map_format { }; /** + * enum dw_edma_chip_flags - Flags specific to an eDMA chip + * @DW_EDMA_CHIP_LOCAL: eDMA is used locally by an endpoint + */ +enum dw_edma_chip_flags { + DW_EDMA_CHIP_LOCAL = BIT(0), +}; + +/** * struct dw_edma_chip - representation of DesignWare eDMA controller hardware * @dev: struct device of the eDMA controller * @id: instance ID * @nr_irqs: total number of DMA IRQs * @ops DMA channel to IRQ number mapping + * @flags dw_edma_chip_flags * @reg_base DMA register base address * @ll_wr_cnt DMA write link list count * @ll_rd_cnt DMA read link list count @@ -55,6 +64,7 @@ struct dw_edma_chip { int id; int nr_irqs; const struct dw_edma_core_ops *ops; + u32 flags; void __iomem *reg_base; |