23.06.2020 15:09, Mikko Perttunen пишет:
struct drm_tegra_submit_relocation { /* [in] Index of GATHER or GATHER_UPTR command in commands. */ __u32 gather_command_index;
/* * [in] Mapping handle (obtained through CHANNEL_MAP) of the memory * the address of which will be patched in. */ __u32 mapping_id;
/* * [in] Offset in the gather that will be patched. */ __u64 gather_offset;
/* * [in] Offset in target buffer whose paddr/IOVA will be written * to the gather. */ __u64 target_offset;
/* * [in] Number of bits the resulting address will be logically * shifted right before writing to gather. */ __u32 shift;
__u32 reserved[1]; };
We will also need read/write direction flag here for the DMA-reservations set up, it will be used for the implicit BO fencing by the job's scheduler.