drm/amdgpu: Add GPUVM memory management functions for KFD

v2:
* Removed unused flags from struct kgd_mem
* Updated some comments
* Added a check to unmap_memory_from_gpu whether BO was mapped

v3: add mutex_destroy in relevant places

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

1 files changed, 89 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
index d1bab32..05a228d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -28,15 +28,41 @@
 #include <linux/types.h>
 #include <linux/mmu_context.h>
 #include <kgd_kfd_interface.h>
+#include <drm/ttm/ttm_execbuf_util.h>
+#include "amdgpu_sync.h"
+#include "amdgpu_vm.h"
 
 extern const struct kgd2kfd_calls *kgd2kfd;
 
 struct amdgpu_device;
 
+struct kfd_bo_va_list {
+	struct list_head bo_list;
+	struct amdgpu_bo_va *bo_va;
+	void *kgd_dev;
+	bool is_mapped;
+	uint64_t va;
+	uint64_t pte_flags;
+};
+
 struct kgd_mem {
+	struct mutex lock;
 	struct amdgpu_bo *bo;
-	uint64_t gpu_addr;
-	void *cpu_ptr;
+	struct list_head bo_va_list;
+	/* protected by amdkfd_process_info.lock */
+	struct ttm_validate_buffer validate_list;
+	struct ttm_validate_buffer resv_list;
+	uint32_t domain;
+	unsigned int mapped_to_gpu_memory;
+	uint64_t va;
+
+	uint32_t mapping_flags;
+
+	struct amdkfd_process_info *process_info;
+
+	struct amdgpu_sync sync;
+
+	bool aql_queue;
 };
 
 /* KFD Memory Eviction */
@@ -52,6 +78,41 @@ struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
 bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm);
 struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f);
 
+struct amdkfd_process_info {
+	/* List head of all VMs that belong to a KFD process */
+	struct list_head vm_list_head;
+	/* List head for all KFD BOs that belong to a KFD process. */
+	struct list_head kfd_bo_list;
+	/* Lock to protect kfd_bo_list */
+	struct mutex lock;
+
+	/* Number of VMs */
+	unsigned int n_vms;
+	/* Eviction Fence */
+	struct amdgpu_amdkfd_fence *eviction_fence;
+};
+
+/* struct amdkfd_vm -
+ * For Memory Eviction KGD requires a mechanism to keep track of all KFD BOs
+ * belonging to a KFD process. All the VMs belonging to the same process point
+ * to the same amdkfd_process_info.
+ */
+struct amdkfd_vm {
+	/* Keep base as the first parameter for pointer compatibility between
+	 * amdkfd_vm and amdgpu_vm.
+	 */
+	struct amdgpu_vm base;
+
+	/* List node in amdkfd_process_info.vm_list_head*/
+	struct list_head vm_list_node;
+
+	struct amdgpu_device *adev;
+	/* Points to the KFD process VM info*/
+	struct amdkfd_process_info *process_info;
+
+	uint64_t pd_phys_addr;
+};
+
 int amdgpu_amdkfd_init(void);
 void amdgpu_amdkfd_fini(void);
 
@@ -96,4 +157,30 @@ uint64_t amdgpu_amdkfd_get_vram_usage(struct kgd_dev *kgd);
 		valid;							\
 	})
 
+/* GPUVM API */
+int amdgpu_amdkfd_gpuvm_create_process_vm(struct kgd_dev *kgd, void **vm,
+					  void **process_info,
+					  struct dma_fence **ef);
+void amdgpu_amdkfd_gpuvm_destroy_process_vm(struct kgd_dev *kgd, void *vm);
+uint32_t amdgpu_amdkfd_gpuvm_get_process_page_dir(void *vm);
+int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
+		struct kgd_dev *kgd, uint64_t va, uint64_t size,
+		void *vm, struct kgd_mem **mem,
+		uint64_t *offset, uint32_t flags);
+int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
+		struct kgd_dev *kgd, struct kgd_mem *mem);
+int amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
+		struct kgd_dev *kgd, struct kgd_mem *mem, void *vm);
+int amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
+		struct kgd_dev *kgd, struct kgd_mem *mem, void *vm);
+int amdgpu_amdkfd_gpuvm_sync_memory(
+		struct kgd_dev *kgd, struct kgd_mem *mem, bool intr);
+int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct kgd_dev *kgd,
+		struct kgd_mem *mem, void **kptr, uint64_t *size);
+int amdgpu_amdkfd_gpuvm_restore_process_bos(void *process_info,
+					    struct dma_fence **ef);
+
+void amdgpu_amdkfd_gpuvm_init_mem_limits(void);
+void amdgpu_amdkfd_unreserve_system_memory_limit(struct amdgpu_bo *bo);
+
 #endif /* AMDGPU_AMDKFD_H_INCLUDED */