[PATCH v5 2/7] accel/ivpu: Add Intel VPU MMU support

[Jeffrey Hugo]

On 1/9/2023 5:23 AM, Jacek Lawrynowicz wrote:
> VPU Memory Management Unit is based on ARM MMU-600.
> It allows the creation of multiple virtual address spaces for
> the device and map noncontinuous host memory (there is no dedicated
> memory on the VPU).
> 
> Address space is implemented as a struct ivpu_mmu_context, it has an ID,
> drm_mm allocator for VPU addresses and struct ivpu_mmu_pgtable that
> holds actual 3-level, 4KB page table.
> Context with ID 0 (global context) is created upon driver initialization
> and it's mainly used for mapping memory required to execute
> the firmware.
> Contexts with non-zero IDs are user contexts allocated each time
> the devices is open()-ed and they map command buffers and other
> workload-related memory.
> Workloads executing in a given contexts have access only
> to the memory mapped in this context.
> 
> This patch is has two main files:
>    - ivpu_mmu_context.c handles MMU page tables and memory mapping
>    - ivpu_mmu.c implements a driver that programs the MMU device
> 
> Co-developed-by: Karol Wachowski <karol.wachowski at linux.intel.com>
> Signed-off-by: Karol Wachowski <karol.wachowski at linux.intel.com>
> Co-developed-by: Krystian Pradzynski <krystian.pradzynski at linux.intel.com>
> Signed-off-by: Krystian Pradzynski <krystian.pradzynski at linux.intel.com>
> Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz at linux.intel.com>

Reviewed-by: Jeffrey Hugo <quic_jhugo at quicinc.com>