From: Oak Zeng Date: Thu, 11 Apr 2019 19:43:39 +0000 (-0500) Subject: drm/amdkfd: Expose HDP registers to user space X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d8e408a82704c86ba87c3d58cfe69dcdb758aa07;p=openwrt%2Fstaging%2Fblogic.git 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 Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index aeead072fa79..401edb605fdd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -519,6 +519,13 @@ uint64_t amdgpu_amdkfd_get_hive_id(struct kgd_dev *kgd) return adev->gmc.xgmi.hive_id; } +uint64_t amdgpu_amdkfd_get_mmio_remap_phys_addr(struct kgd_dev *kgd) +{ + struct amdgpu_device *adev = (struct amdgpu_device *)kgd; + + return adev->rmmio_remap.bus_addr; +} + int amdgpu_amdkfd_submit_ib(struct kgd_dev *kgd, enum kgd_engine_type engine, uint32_t vmid, uint64_t gpu_addr, uint32_t *ib_cmd, uint32_t ib_len) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h index 4e37fa7e85b1..ea1f141db3ff 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h @@ -169,6 +169,7 @@ int amdgpu_amdkfd_get_dmabuf_info(struct kgd_dev *kgd, int dma_buf_fd, uint32_t *flags); uint64_t amdgpu_amdkfd_get_vram_usage(struct kgd_dev *kgd); uint64_t amdgpu_amdkfd_get_hive_id(struct kgd_dev *kgd); +uint64_t amdgpu_amdkfd_get_mmio_remap_phys_addr(struct kgd_dev *kgd); #define read_user_wptr(mmptr, wptr, dst) \ ({ \ diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index a6e5184d436c..00e013581a70 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1109,7 +1109,8 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( if (!offset || !*offset) return -EINVAL; user_addr = *offset; - } else if (flags & ALLOC_MEM_FLAGS_DOORBELL) { + } else if (flags & (ALLOC_MEM_FLAGS_DOORBELL | + ALLOC_MEM_FLAGS_MMIO_REMAP)) { domain = AMDGPU_GEM_DOMAIN_GTT; alloc_domain = AMDGPU_GEM_DOMAIN_CPU; bo_type = ttm_bo_type_sg; @@ -1294,8 +1295,8 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu( /* Free the sync object */ amdgpu_sync_free(&mem->sync); - /* If the SG is not NULL, it's one we created for a doorbell - * BO. We need to free it. + /* If the SG is not NULL, it's one we created for a doorbell or mmio + * remap BO. We need to free it. */ if (mem->bo->tbo.sg) { sg_free_table(mem->bo->tbo.sg); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index 083bd8114db1..d795e5018270 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1272,6 +1272,12 @@ static int kfd_ioctl_alloc_memory_of_gpu(struct file *filep, if (args->size != kfd_doorbell_process_slice(dev)) return -EINVAL; offset = kfd_get_process_doorbells(dev, p); + } else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP) { + if (args->size != PAGE_SIZE) + return -EINVAL; + offset = amdgpu_amdkfd_get_mmio_remap_phys_addr(dev->kgd); + if (!offset) + return -ENOMEM; } mutex_lock(&p->mutex); diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h index b897aca9b4c9..98b9533e672b 100644 --- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h +++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h @@ -174,6 +174,7 @@ struct tile_config { #define ALLOC_MEM_FLAGS_GTT (1 << 1) #define ALLOC_MEM_FLAGS_USERPTR (1 << 2) #define ALLOC_MEM_FLAGS_DOORBELL (1 << 3) +#define ALLOC_MEM_FLAGS_MMIO_REMAP (1 << 4) /* * Allocation flags attributes/access options. diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h index bb1b4280f53d..1e7d5f3376b0 100644 --- a/include/uapi/linux/kfd_ioctl.h +++ b/include/uapi/linux/kfd_ioctl.h @@ -338,6 +338,7 @@ struct kfd_ioctl_acquire_vm_args { #define KFD_IOC_ALLOC_MEM_FLAGS_GTT (1 << 1) #define KFD_IOC_ALLOC_MEM_FLAGS_USERPTR (1 << 2) #define KFD_IOC_ALLOC_MEM_FLAGS_DOORBELL (1 << 3) +#define KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP (1 << 4) /* Allocation flags: attributes/access options */ #define KFD_IOC_ALLOC_MEM_FLAGS_WRITABLE (1 << 31) #define KFD_IOC_ALLOC_MEM_FLAGS_EXECUTABLE (1 << 30)