diff options
Diffstat (limited to 'gxp-dma.h')
| -rw-r--r-- | gxp-dma.h | 27 |
1 files changed, 24 insertions, 3 deletions
@@ -10,7 +10,7 @@ #include <linux/dma-direction.h> #include <linux/dma-mapping.h> #include <linux/types.h> -#ifdef CONFIG_ANDROID +#if IS_ENABLED(CONFIG_ANDROID) && !IS_ENABLED(CONFIG_GXP_GEM5) #include <soc/google/tpu-ext.h> #endif @@ -31,6 +31,27 @@ struct gxp_dma_manager { #define DMA_MAPPING_ERROR (~(dma_addr_t)0) #endif +/* + * TODO(b/214113464) This is a temporary interface to reprogram the SSMT every + * time the block is powered up. It should be replaced with a new interface for + * assigning a given virtual device's domain to that virtual device's physical + * core once VD suspend/resume is implemented. + */ +/** + * gxp_dma_ssmt_program() - Program the SSMTs to map each core to its page table. + * @gxp: The GXP device to program the SSMTs for + * + * Every time the DSP block is powered on, the SSMTs must be re-programmed to + * map traffic from each physical core to be translated via that core's + * assigned page table. This API must be called every time the block is powered + * on for DSP usage. + * + * Return: + * * 0 - Success + * * Other - Reserved + */ +int gxp_dma_ssmt_program(struct gxp_dev *gxp); + /** * gxp_dma_init() - Initialize the GXP DMA subsystem * @gxp: The GXP device to initialize DMA for @@ -77,7 +98,7 @@ int gxp_dma_map_resources(struct gxp_dev *gxp); */ void gxp_dma_unmap_resources(struct gxp_dev *gxp); -#ifdef CONFIG_ANDROID +#if IS_ENABLED(CONFIG_ANDROID) && !IS_ENABLED(CONFIG_GXP_GEM5) /** * gxp_dma_map_tpu_buffer() - Map the tpu mbx queue buffers with fixed IOVAs * @gxp: The GXP device to setup the mappings for @@ -98,7 +119,7 @@ int gxp_dma_map_tpu_buffer(struct gxp_dev *gxp, uint core_list, */ void gxp_dma_unmap_tpu_buffer(struct gxp_dev *gxp, struct gxp_tpu_mbx_desc mbx_desc); -#endif // CONFIG_ANDROID +#endif // CONFIG_ANDROID && !CONFIG_GXP_GEM5 /** * gxp_dma_alloc_coherent() - Allocate and map a coherent buffer for a GXP core |