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.
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