diff options
Diffstat (limited to 'arch/arm/plat-nomadik/include/plat/ste_dma40.h')
| -rw-r--r-- | arch/arm/plat-nomadik/include/plat/ste_dma40.h | 72 |
1 files changed, 8 insertions, 64 deletions
diff --git a/arch/arm/plat-nomadik/include/plat/ste_dma40.h b/arch/arm/plat-nomadik/include/plat/ste_dma40.h index ec716f24bac..c97d61425db 100644 --- a/arch/arm/plat-nomadik/include/plat/ste_dma40.h +++ b/arch/arm/plat-nomadik/include/plat/ste_dma40.h @@ -141,6 +141,12 @@ struct stedma40_chan_cfg { * @memcpy_conf_phy: default configuration of physical channel memcpy * @memcpy_conf_log: default configuration of logical channel memcpy * @disabled_channels: A vector, ending with -1, that marks physical channels + * @soft_lli_chans: A vector, that marks physical channels will use LLI by SW + * which avoids HW bug that exists in some versions of the + * controller. SoftLLI introduces relink overhead that could + * impact performace for certain use cases. + * @num_of_soft_lli_chans: The number of channels that needs to be configured + * to use SoftLLI. * @use_esram_lcla: flag for mapping the lcla into esram region * that are for different reasons not available for the driver. */ @@ -153,29 +159,13 @@ struct stedma40_platform_data { struct stedma40_chan_cfg *memcpy_conf_phy; struct stedma40_chan_cfg *memcpy_conf_log; int disabled_channels[STEDMA40_MAX_PHYS]; + int *soft_lli_chans; + int num_of_soft_lli_chans; bool use_esram_lcla; }; struct d40_desc; -/** - * struct stedma40_cyclic_desc - Cyclic DMA descriptor - * @d40d: DMA driver internal descriptor - * @period_callback: callback to be called after every link/period if - * the DMA_PREP_INTERRUPT flag is used when preparing - * the transaction - * @period_callback_param: handle passed to the period_callback - * - * A pointer to a structure of this type is returned from the - * stedma40_cyclic_prep_sg() function. The period_callback and - * period_callback_param members can be set by the client. - */ -struct stedma40_cyclic_desc { - struct d40_desc *d40d; - dma_async_tx_callback period_callback; - void *period_callback_param; -}; - int stedma40_set_dev_addr(struct dma_chan *chan, dma_addr_t src_dev_addr, dma_addr_t dst_dev_addr); @@ -199,52 +189,6 @@ dma_addr_t stedma40_get_src_addr(struct dma_chan *chan); dma_addr_t stedma40_get_dst_addr(struct dma_chan *chan); /** - * stedma40_cyclic_prep_sg - prepare a cyclic DMA transfer - * @chan: the DMA channel to prepare - * @sgl: scatter list - * @sg_len: number of links in the scatter list - * @direction: transfer direction, to or from device - * @dma_flags: DMA_PREP_INTERRUPT if a callback is required after every link. - * See period_callback in struct stedma40_cyclic_desc. - * - * Must be called before trying to start a cyclic DMA transfer. Returns - * ERR_PTR(-errno) on failure. - */ -struct stedma40_cyclic_desc * -stedma40_cyclic_prep_sg(struct dma_chan *chan, - struct scatterlist *sgl, - unsigned int sg_len, - enum dma_data_direction direction, - unsigned long dma_flags); - -/** - * stedma40_cyclic_start - start the cyclic DMA transfer - * @chan: the DMA channel to start - * - * The cyclic DMA must have been prepared earlier with - * stedma40_cyclic_prep_sg(). - */ -int stedma40_cyclic_start(struct dma_chan *chan); - -/** - * stedma40_cyclic_stop() - stop the cyclic DMA transfer - * @chan: the DMA channel to stop - * - * Stops a cyclic DMA transfer which was previously started with - * stedma40_cyclic_start(). - */ -void stedma40_cyclic_stop(struct dma_chan *chan); - -/** - * stedma40_cyclic_free() - free cyclic DMA resources - * @chan: the DMA channel - * - * Must be called to free any resources used for cyclic DMA which have been - * allocated in stedma40_cyclic_prep_sg(). - */ -void stedma40_cyclic_free(struct dma_chan *chan); - -/** * setdma40_residue() - Returna the remaining bytes to transfer. * * @chan: dmaengine handle |