diff options
author | Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> | 2023-01-17 12:27:18 +0300 |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2023-01-19 13:07:22 +0300 |
commit | 263b2ba5fc93c875129e0d2b4034d7d8a34b3d39 (patch) | |
tree | 2526b4b3c8f76eba922575cf4087a31e93d8bdbd /drivers/accel/ivpu/ivpu_mmu_context.h | |
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 'drivers/accel/ivpu/ivpu_mmu_context.h')
-rw-r--r-- | drivers/accel/ivpu/ivpu_mmu_context.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/accel/ivpu/ivpu_mmu_context.h b/drivers/accel/ivpu/ivpu_mmu_context.h new file mode 100644 index 000000000000..ddf11b95023a --- /dev/null +++ b/drivers/accel/ivpu/ivpu_mmu_context.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020-2023 Intel Corporation + */ + +#ifndef __IVPU_MMU_CONTEXT_H__ +#define __IVPU_MMU_CONTEXT_H__ + +#include <drm/drm_mm.h> + +struct ivpu_device; +struct ivpu_file_priv; +struct ivpu_addr_range; + +#define IVPU_MMU_PGTABLE_ENTRIES 512 + +struct ivpu_mmu_pgtable { + u64 **pgd_cpu_entries[IVPU_MMU_PGTABLE_ENTRIES]; + u64 *pgd_entries[IVPU_MMU_PGTABLE_ENTRIES]; + u64 *pgd; + dma_addr_t pgd_dma; +}; + +struct ivpu_mmu_context { + struct mutex lock; /* protects: mm, pgtable, bo_list */ + struct drm_mm mm; + struct ivpu_mmu_pgtable pgtable; + struct list_head bo_list; + u32 id; +}; + +int ivpu_mmu_global_context_init(struct ivpu_device *vdev); +void ivpu_mmu_global_context_fini(struct ivpu_device *vdev); + +int ivpu_mmu_user_context_init(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, u32 ctx_id); +void ivpu_mmu_user_context_fini(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx); +void ivpu_mmu_user_context_mark_invalid(struct ivpu_device *vdev, u32 ssid); + +int ivpu_mmu_context_insert_node_locked(struct ivpu_mmu_context *ctx, + const struct ivpu_addr_range *range, + u64 size, struct drm_mm_node *node); +void ivpu_mmu_context_remove_node_locked(struct ivpu_mmu_context *ctx, + struct drm_mm_node *node); + +int ivpu_mmu_context_map_sgt(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, + u64 vpu_addr, struct sg_table *sgt, bool llc_coherent); +void ivpu_mmu_context_unmap_sgt(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, + u64 vpu_addr, struct sg_table *sgt); + +#endif /* __IVPU_MMU_CONTEXT_H__ */ |