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| author | Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> | 2023-01-17 12:27:18 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2023-01-19 13:07:22 +0300 |
| commit | 263b2ba5fc93c875129e0d2b4034d7d8a34b3d39 (patch) | |
| tree | 2526b4b3c8f76eba922575cf4087a31e93d8bdbd /include | |
| parent | 35b137630f08d913fc2e33df33ccc2570dff3f7d (diff) | |
| download | linux-263b2ba5fc93c875129e0d2b4034d7d8a34b3d39.tar.xz | |
accel/ivpu: Add Intel VPU MMU support
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@linux.intel.com>
Signed-off-by: Karol Wachowski <karol.wachowski@linux.intel.com>
Co-developed-by: Krystian Pradzynski <krystian.pradzynski@linux.intel.com>
Signed-off-by: Krystian Pradzynski <krystian.pradzynski@linux.intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20230117092723.60441-3-jacek.lawrynowicz@linux.intel.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/drm/ivpu_accel.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/drm/ivpu_accel.h b/include/uapi/drm/ivpu_accel.h index c6a98977eb8e..543347df51a1 100644 --- a/include/uapi/drm/ivpu_accel.h +++ b/include/uapi/drm/ivpu_accel.h @@ -38,6 +38,7 @@ extern "C" { #define DRM_IVPU_PARAM_NUM_CONTEXTS 4 #define DRM_IVPU_PARAM_CONTEXT_BASE_ADDRESS 5 #define DRM_IVPU_PARAM_CONTEXT_PRIORITY 6 +#define DRM_IVPU_PARAM_CONTEXT_ID 7 #define DRM_IVPU_PLATFORM_TYPE_SILICON 0 @@ -78,6 +79,9 @@ struct drm_ivpu_param { * Value of current context scheduling priority (read-write). * See DRM_IVPU_CONTEXT_PRIORITY_* for possible values. * + * %DRM_IVPU_PARAM_CONTEXT_ID: + * Current context ID, always greater than 0 (read-only) + * */ __u32 param; |