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drm/amdkfd: Expose HDP registers to user space
Introduce a new memory type (KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) and expose mmio page of HDP registers to user space through this new memory type. v2: moved remapped hdp regs to adev struct v3: rename the new memory type to ALLOC_MEM_FLAGS_MMIO_REMAP v4: use more generic function name v5: Fail remapped mmio allocation for asics before gfx9 Signed-off-by: Oak Zeng <Oak.Zeng@amd.com> Reviewed-by: Felix Kuehling <felix.kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -519,6 +519,13 @@ uint64_t amdgpu_amdkfd_get_hive_id(struct kgd_dev *kgd)
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return adev->gmc.xgmi.hive_id;
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}
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uint64_t amdgpu_amdkfd_get_mmio_remap_phys_addr(struct kgd_dev *kgd)
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{
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struct amdgpu_device *adev = (struct amdgpu_device *)kgd;
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return adev->rmmio_remap.bus_addr;
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}
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int amdgpu_amdkfd_submit_ib(struct kgd_dev *kgd, enum kgd_engine_type engine,
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uint32_t vmid, uint64_t gpu_addr,
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uint32_t *ib_cmd, uint32_t ib_len)
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@ -169,6 +169,7 @@ int amdgpu_amdkfd_get_dmabuf_info(struct kgd_dev *kgd, int dma_buf_fd,
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uint32_t *flags);
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uint64_t amdgpu_amdkfd_get_vram_usage(struct kgd_dev *kgd);
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uint64_t amdgpu_amdkfd_get_hive_id(struct kgd_dev *kgd);
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uint64_t amdgpu_amdkfd_get_mmio_remap_phys_addr(struct kgd_dev *kgd);
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#define read_user_wptr(mmptr, wptr, dst) \
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({ \
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@ -1109,7 +1109,8 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
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if (!offset || !*offset)
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return -EINVAL;
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user_addr = *offset;
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} else if (flags & ALLOC_MEM_FLAGS_DOORBELL) {
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} else if (flags & (ALLOC_MEM_FLAGS_DOORBELL |
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ALLOC_MEM_FLAGS_MMIO_REMAP)) {
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domain = AMDGPU_GEM_DOMAIN_GTT;
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alloc_domain = AMDGPU_GEM_DOMAIN_CPU;
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bo_type = ttm_bo_type_sg;
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@ -1294,8 +1295,8 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
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/* Free the sync object */
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amdgpu_sync_free(&mem->sync);
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/* If the SG is not NULL, it's one we created for a doorbell
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* BO. We need to free it.
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/* If the SG is not NULL, it's one we created for a doorbell or mmio
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* remap BO. We need to free it.
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*/
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if (mem->bo->tbo.sg) {
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sg_free_table(mem->bo->tbo.sg);
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@ -1272,6 +1272,12 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep,
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if (args->size != kfd_doorbell_process_slice(dev))
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return -EINVAL;
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offset = kfd_get_process_doorbells(dev, p);
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} else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) {
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if (args->size != PAGE_SIZE)
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return -EINVAL;
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offset = amdgpu_amdkfd_get_mmio_remap_phys_addr(dev->kgd);
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if (!offset)
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return -ENOMEM;
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}
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mutex_lock(&p->mutex);
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@ -174,6 +174,7 @@ struct tile_config {
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#define ALLOC_MEM_FLAGS_GTT (1 << 1)
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#define ALLOC_MEM_FLAGS_USERPTR (1 << 2)
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#define ALLOC_MEM_FLAGS_DOORBELL (1 << 3)
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#define ALLOC_MEM_FLAGS_MMIO_REMAP (1 << 4)
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/*
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* Allocation flags attributes/access options.
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@ -338,6 +338,7 @@ struct kfd_ioctl_acquire_vm_args {
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#define KFD_IOC_ALLOC_MEM_FLAGS_GTT (1 << 1)
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#define KFD_IOC_ALLOC_MEM_FLAGS_USERPTR (1 << 2)
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#define KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL (1 << 3)
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#define KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP (1 << 4)
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/* Allocation flags: attributes/access options */
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#define KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE (1 << 31)
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#define KFD_IOC_ALLOC_MEM_FLAGS_EXECUTABLE (1 << 30)
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