drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h - third_party/linux - Git at Google


            
            /*

            
             * Copyright 2016 Advanced Micro Devices, Inc.

            
             *

            
             * Permission is hereby granted, free of charge, to any person obtaining a

            
             * copy of this software and associated documentation files (the "Software"),

            
             * to deal in the Software without restriction, including without limitation

            
             * the rights to use, copy, modify, merge, publish, distribute, sublicense,

            
             * and/or sell copies of the Software, and to permit persons to whom the

            
             * Software is furnished to do so, subject to the following conditions:

            
             *

            
             * The above copyright notice and this permission notice shall be included in

            
             * all copies or substantial portions of the Software.

            
             *

            
             * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

            
             * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

            
             * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

            
             * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR

            
             * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

            
             * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

            
             * OTHER DEALINGS IN THE SOFTWARE.

            
             *

            
             * Authors: Christian König

            
             */

            
            #ifndef __AMDGPU_RING_H__

            
            #define __AMDGPU_RING_H__


            #include "gpu_scheduler.h"


            /* max number of rings */

            
            #define AMDGPU_MAX_RINGS		18

            
            #define AMDGPU_MAX_GFX_RINGS		1

            
            #define AMDGPU_MAX_COMPUTE_RINGS	8

            
            #define AMDGPU_MAX_VCE_RINGS		3

            
            #define AMDGPU_MAX_UVD_ENC_RINGS	2


            /* some special values for the owner field */

            
            #define AMDGPU_FENCE_OWNER_UNDEFINED	((void*)0ul)

            
            #define AMDGPU_FENCE_OWNER_VM		((void*)1ul)


            #define AMDGPU_FENCE_FLAG_64BIT         (1 << 0)

            
            #define AMDGPU_FENCE_FLAG_INT           (1 << 1)


            enum amdgpu_ring_type {

            
            	AMDGPU_RING_TYPE_GFX,

            
            	AMDGPU_RING_TYPE_COMPUTE,

            
            	AMDGPU_RING_TYPE_SDMA,

            
            	AMDGPU_RING_TYPE_UVD,

            
            	AMDGPU_RING_TYPE_VCE,

            
            	AMDGPU_RING_TYPE_KIQ,

            
            	AMDGPU_RING_TYPE_UVD_ENC,

            
            	AMDGPU_RING_TYPE_VCN_DEC,

            
            	AMDGPU_RING_TYPE_VCN_ENC

            
            };


            struct amdgpu_device;

            
            struct amdgpu_ring;

            
            struct amdgpu_ib;

            
            struct amdgpu_cs_parser;


            /*

            
             * Fences.

            
             */

            
            struct amdgpu_fence_driver {

            
            	uint64_t			gpu_addr;

            
            	volatile uint32_t		*cpu_addr;

            
            	/* sync_seq is protected by ring emission lock */

            
            	uint32_t			sync_seq;

            
            	atomic_t			last_seq;

            
            	bool				initialized;

            
            	struct amdgpu_irq_src		*irq_src;

            
            	unsigned			irq_type;

            
            	struct timer_list		fallback_timer;

            
            	unsigned			num_fences_mask;

            
            	spinlock_t			lock;

            
            	struct dma_fence		**fences;

            
            };


            int amdgpu_fence_driver_init(struct amdgpu_device *adev);

            
            void amdgpu_fence_driver_fini(struct amdgpu_device *adev);

            
            void amdgpu_fence_driver_force_completion(struct amdgpu_device *adev);

            
            void amdgpu_fence_driver_force_completion_ring(struct amdgpu_ring *ring);


            int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,

            
            				  unsigned num_hw_submission);

            
            int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring,

            
            				   struct amdgpu_irq_src *irq_src,

            
            				   unsigned irq_type);

            
            void amdgpu_fence_driver_suspend(struct amdgpu_device *adev);

            
            void amdgpu_fence_driver_resume(struct amdgpu_device *adev);

            
            int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **fence);

            
            void amdgpu_fence_process(struct amdgpu_ring *ring);

            
            int amdgpu_fence_wait_empty(struct amdgpu_ring *ring);

            
            unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring);


            /*

            
             * Rings.

            
             */


            /* provided by hw blocks that expose a ring buffer for commands */

            
            struct amdgpu_ring_funcs {

            
            	enum amdgpu_ring_type	type;

            
            	uint32_t		align_mask;

            
            	u32			nop;

            
            	bool			support_64bit_ptrs;

            
            	unsigned		vmhub;


            	/* ring read/write ptr handling */

            
            	u64 (*get_rptr)(struct amdgpu_ring *ring);

            
            	u64 (*get_wptr)(struct amdgpu_ring *ring);

            
            	void (*set_wptr)(struct amdgpu_ring *ring);

            
            	/* validating and patching of IBs */

            
            	int (*parse_cs)(struct amdgpu_cs_parser *p, uint32_t ib_idx);

            
            	/* constants to calculate how many DW are needed for an emit */

            
            	unsigned emit_frame_size;

            
            	unsigned emit_ib_size;

            
            	/* command emit functions */

            
            	void (*emit_ib)(struct amdgpu_ring *ring,

            
            			struct amdgpu_ib *ib,

            
            			unsigned vm_id, bool ctx_switch);

            
            	void (*emit_fence)(struct amdgpu_ring *ring, uint64_t addr,

            
            			   uint64_t seq, unsigned flags);

            
            	void (*emit_pipeline_sync)(struct amdgpu_ring *ring);

            
            	void (*emit_vm_flush)(struct amdgpu_ring *ring, unsigned vm_id,

            
            			      uint64_t pd_addr);

            
            	void (*emit_hdp_flush)(struct amdgpu_ring *ring);

            
            	void (*emit_hdp_invalidate)(struct amdgpu_ring *ring);

            
            	void (*emit_gds_switch)(struct amdgpu_ring *ring, uint32_t vmid,

            
            				uint32_t gds_base, uint32_t gds_size,

            
            				uint32_t gws_base, uint32_t gws_size,

            
            				uint32_t oa_base, uint32_t oa_size);

            
            	/* testing functions */

            
            	int (*test_ring)(struct amdgpu_ring *ring);

            
            	int (*test_ib)(struct amdgpu_ring *ring, long timeout);

            
            	/* insert NOP packets */

            
            	void (*insert_nop)(struct amdgpu_ring *ring, uint32_t count);

            
            	void (*insert_start)(struct amdgpu_ring *ring);

            
            	void (*insert_end)(struct amdgpu_ring *ring);

            
            	/* pad the indirect buffer to the necessary number of dw */

            
            	void (*pad_ib)(struct amdgpu_ring *ring, struct amdgpu_ib *ib);

            
            	unsigned (*init_cond_exec)(struct amdgpu_ring *ring);

            
            	void (*patch_cond_exec)(struct amdgpu_ring *ring, unsigned offset);

            
            	/* note usage for clock and power gating */

            
            	void (*begin_use)(struct amdgpu_ring *ring);

            
            	void (*end_use)(struct amdgpu_ring *ring);

            
            	void (*emit_switch_buffer) (struct amdgpu_ring *ring);

            
            	void (*emit_cntxcntl) (struct amdgpu_ring *ring, uint32_t flags);

            
            	void (*emit_rreg)(struct amdgpu_ring *ring, uint32_t reg);

            
            	void (*emit_wreg)(struct amdgpu_ring *ring, uint32_t reg, uint32_t val);

            
            	void (*emit_tmz)(struct amdgpu_ring *ring, bool start);

            
            };


            struct amdgpu_ring {

            
            	struct amdgpu_device		*adev;

            
            	const struct amdgpu_ring_funcs	*funcs;

            
            	struct amdgpu_fence_driver	fence_drv;

            
            	struct amd_gpu_scheduler	sched;

            
            	struct list_head		lru_list;


            	struct amdgpu_bo	*ring_obj;

            
            	volatile uint32_t	*ring;

            
            	unsigned		rptr_offs;

            
            	u64			wptr;

            
            	u64			wptr_old;

            
            	unsigned		ring_size;

            
            	unsigned		max_dw;

            
            	int			count_dw;

            
            	uint64_t		gpu_addr;

            
            	uint64_t		ptr_mask;

            
            	uint32_t		buf_mask;

            
            	bool			ready;

            
            	u32			idx;

            
            	u32			me;

            
            	u32			pipe;

            
            	u32			queue;

            
            	struct amdgpu_bo	*mqd_obj;

            
            	uint64_t                mqd_gpu_addr;

            
            	void                    *mqd_ptr;

            
            	uint64_t                eop_gpu_addr;

            
            	u32			doorbell_index;

            
            	bool			use_doorbell;

            
            	unsigned		wptr_offs;

            
            	unsigned		fence_offs;

            
            	uint64_t		current_ctx;

            
            	char			name[16];

            
            	unsigned		cond_exe_offs;

            
            	u64			cond_exe_gpu_addr;

            
            	volatile u32		*cond_exe_cpu_addr;

            
            	unsigned		vm_inv_eng;

            
            	bool			has_compute_vm_bug;

            
            #if defined(CONFIG_DEBUG_FS)

            
            	struct dentry *ent;

            
            #endif

            
            };


            int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw);

            
            void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count);

            
            void amdgpu_ring_generic_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib);

            
            void amdgpu_ring_commit(struct amdgpu_ring *ring);

            
            void amdgpu_ring_undo(struct amdgpu_ring *ring);

            
            int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,

            
            		     unsigned ring_size, struct amdgpu_irq_src *irq_src,

            
            		     unsigned irq_type);

            
            void amdgpu_ring_fini(struct amdgpu_ring *ring);

            
            int amdgpu_ring_lru_get(struct amdgpu_device *adev, int type, int *blacklist,

            
            			int num_blacklist, struct amdgpu_ring **ring);

            
            void amdgpu_ring_lru_touch(struct amdgpu_device *adev, struct amdgpu_ring *ring);

            
            static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)

            
            {

            
            	int i = 0;

            
            	while (i <= ring->buf_mask)

            
            		ring->ring[i++] = ring->funcs->nop;


            }


            static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)

            
            {

            
            	if (ring->count_dw <= 0)

            
            		DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");

            
            	ring->ring[ring->wptr++ & ring->buf_mask] = v;

            
            	ring->wptr &= ring->ptr_mask;

            
            	ring->count_dw--;

            
            }


            static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,

            
            					      void *src, int count_dw)

            
            {

            
            	unsigned occupied, chunk1, chunk2;

            
            	void *dst;


            	if (unlikely(ring->count_dw < count_dw))

            
            		DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");


            	occupied = ring->wptr & ring->buf_mask;

            
            	dst = (void *)&ring->ring[occupied];

            
            	chunk1 = ring->buf_mask + 1 - occupied;

            
            	chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;

            
            	chunk2 = count_dw - chunk1;

            
            	chunk1 <<= 2;

            
            	chunk2 <<= 2;


            	if (chunk1)

            
            		memcpy(dst, src, chunk1);


            	if (chunk2) {

            
            		src += chunk1;

            
            		dst = (void *)ring->ring;

            
            		memcpy(dst, src, chunk2);

            
            	}


            	ring->wptr += count_dw;

            
            	ring->wptr &= ring->ptr_mask;

            
            	ring->count_dw -= count_dw;

            
            }


            #endif
	/*
	* Copyright 2016 Advanced Micro Devices, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	* Authors: Christian König
	*/
	#ifndef __AMDGPU_RING_H__
	#define __AMDGPU_RING_H__

	#include "gpu_scheduler.h"

	/* max number of rings */
	#define AMDGPU_MAX_RINGS 18
	#define AMDGPU_MAX_GFX_RINGS 1
	#define AMDGPU_MAX_COMPUTE_RINGS 8
	#define AMDGPU_MAX_VCE_RINGS 3
	#define AMDGPU_MAX_UVD_ENC_RINGS 2

	/* some special values for the owner field */
	#define AMDGPU_FENCE_OWNER_UNDEFINED ((void*)0ul)
	#define AMDGPU_FENCE_OWNER_VM ((void*)1ul)

	#define AMDGPU_FENCE_FLAG_64BIT (1 << 0)
	#define AMDGPU_FENCE_FLAG_INT (1 << 1)

	enum amdgpu_ring_type {
	AMDGPU_RING_TYPE_GFX,
	AMDGPU_RING_TYPE_COMPUTE,
	AMDGPU_RING_TYPE_SDMA,
	AMDGPU_RING_TYPE_UVD,
	AMDGPU_RING_TYPE_VCE,
	AMDGPU_RING_TYPE_KIQ,
	AMDGPU_RING_TYPE_UVD_ENC,
	AMDGPU_RING_TYPE_VCN_DEC,
	AMDGPU_RING_TYPE_VCN_ENC
	};

	struct amdgpu_device;
	struct amdgpu_ring;
	struct amdgpu_ib;
	struct amdgpu_cs_parser;

	/*
	* Fences.
	*/
	struct amdgpu_fence_driver {
	uint64_t gpu_addr;
	volatile uint32_t *cpu_addr;
	/* sync_seq is protected by ring emission lock */
	uint32_t sync_seq;
	atomic_t last_seq;
	bool initialized;
	struct amdgpu_irq_src *irq_src;
	unsigned irq_type;
	struct timer_list fallback_timer;
	unsigned num_fences_mask;
	spinlock_t lock;
	struct dma_fence **fences;
	};

	int amdgpu_fence_driver_init(struct amdgpu_device *adev);
	void amdgpu_fence_driver_fini(struct amdgpu_device *adev);
	void amdgpu_fence_driver_force_completion(struct amdgpu_device *adev);
	void amdgpu_fence_driver_force_completion_ring(struct amdgpu_ring *ring);

	int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,
	unsigned num_hw_submission);
	int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring,
	struct amdgpu_irq_src *irq_src,
	unsigned irq_type);
	void amdgpu_fence_driver_suspend(struct amdgpu_device *adev);
	void amdgpu_fence_driver_resume(struct amdgpu_device *adev);
	int amdgpu_fence_emit(struct amdgpu_ring ring, struct dma_fence *fence);
	void amdgpu_fence_process(struct amdgpu_ring *ring);
	int amdgpu_fence_wait_empty(struct amdgpu_ring *ring);
	unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring);

	/*
	* Rings.
	*/

	/* provided by hw blocks that expose a ring buffer for commands */
	struct amdgpu_ring_funcs {
	enum amdgpu_ring_type type;
	uint32_t align_mask;
	u32 nop;
	bool support_64bit_ptrs;
	unsigned vmhub;

	/* ring read/write ptr handling */
	u64 (get_rptr)(struct amdgpu_ring ring);
	u64 (get_wptr)(struct amdgpu_ring ring);
	void (set_wptr)(struct amdgpu_ring ring);
	/* validating and patching of IBs */
	int (parse_cs)(struct amdgpu_cs_parser p, uint32_t ib_idx);
	/* constants to calculate how many DW are needed for an emit */
	unsigned emit_frame_size;
	unsigned emit_ib_size;
	/* command emit functions */
	void (emit_ib)(struct amdgpu_ring ring,
	struct amdgpu_ib *ib,
	unsigned vm_id, bool ctx_switch);
	void (emit_fence)(struct amdgpu_ring ring, uint64_t addr,
	uint64_t seq, unsigned flags);
	void (emit_pipeline_sync)(struct amdgpu_ring ring);
	void (emit_vm_flush)(struct amdgpu_ring ring, unsigned vm_id,
	uint64_t pd_addr);
	void (emit_hdp_flush)(struct amdgpu_ring ring);
	void (emit_hdp_invalidate)(struct amdgpu_ring ring);
	void (emit_gds_switch)(struct amdgpu_ring ring, uint32_t vmid,
	uint32_t gds_base, uint32_t gds_size,
	uint32_t gws_base, uint32_t gws_size,
	uint32_t oa_base, uint32_t oa_size);
	/* testing functions */
	int (test_ring)(struct amdgpu_ring ring);
	int (test_ib)(struct amdgpu_ring ring, long timeout);
	/* insert NOP packets */
	void (insert_nop)(struct amdgpu_ring ring, uint32_t count);
	void (insert_start)(struct amdgpu_ring ring);
	void (insert_end)(struct amdgpu_ring ring);
	/* pad the indirect buffer to the necessary number of dw */
	void (pad_ib)(struct amdgpu_ring ring, struct amdgpu_ib *ib);
	unsigned (init_cond_exec)(struct amdgpu_ring ring);
	void (patch_cond_exec)(struct amdgpu_ring ring, unsigned offset);
	/* note usage for clock and power gating */
	void (begin_use)(struct amdgpu_ring ring);
	void (end_use)(struct amdgpu_ring ring);
	void (emit_switch_buffer) (struct amdgpu_ring ring);
	void (emit_cntxcntl) (struct amdgpu_ring ring, uint32_t flags);
	void (emit_rreg)(struct amdgpu_ring ring, uint32_t reg);
	void (emit_wreg)(struct amdgpu_ring ring, uint32_t reg, uint32_t val);
	void (emit_tmz)(struct amdgpu_ring ring, bool start);
	};

	struct amdgpu_ring {
	struct amdgpu_device *adev;
	const struct amdgpu_ring_funcs *funcs;
	struct amdgpu_fence_driver fence_drv;
	struct amd_gpu_scheduler sched;
	struct list_head lru_list;

	struct amdgpu_bo *ring_obj;
	volatile uint32_t *ring;
	unsigned rptr_offs;
	u64 wptr;
	u64 wptr_old;
	unsigned ring_size;
	unsigned max_dw;
	int count_dw;
	uint64_t gpu_addr;
	uint64_t ptr_mask;
	uint32_t buf_mask;
	bool ready;
	u32 idx;
	u32 me;
	u32 pipe;
	u32 queue;
	struct amdgpu_bo *mqd_obj;
	uint64_t mqd_gpu_addr;
	void *mqd_ptr;
	uint64_t eop_gpu_addr;
	u32 doorbell_index;
	bool use_doorbell;
	unsigned wptr_offs;
	unsigned fence_offs;
	uint64_t current_ctx;
	char name[16];
	unsigned cond_exe_offs;
	u64 cond_exe_gpu_addr;
	volatile u32 *cond_exe_cpu_addr;
	unsigned vm_inv_eng;
	bool has_compute_vm_bug;
	#if defined(CONFIG_DEBUG_FS)
	struct dentry *ent;
	#endif
	};

	int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw);
	void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count);
	void amdgpu_ring_generic_pad_ib(struct amdgpu_ring ring, struct amdgpu_ib ib);
	void amdgpu_ring_commit(struct amdgpu_ring *ring);
	void amdgpu_ring_undo(struct amdgpu_ring *ring);
	int amdgpu_ring_init(struct amdgpu_device adev, struct amdgpu_ring ring,
	unsigned ring_size, struct amdgpu_irq_src *irq_src,
	unsigned irq_type);
	void amdgpu_ring_fini(struct amdgpu_ring *ring);
	int amdgpu_ring_lru_get(struct amdgpu_device adev, int type, int blacklist,
	int num_blacklist, struct amdgpu_ring **ring);
	void amdgpu_ring_lru_touch(struct amdgpu_device adev, struct amdgpu_ring ring);
	static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
	{
	int i = 0;
	while (i <= ring->buf_mask)
	ring->ring[i++] = ring->funcs->nop;

	}

	static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)
	{
	if (ring->count_dw <= 0)
	DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");
	ring->ring[ring->wptr++ & ring->buf_mask] = v;
	ring->wptr &= ring->ptr_mask;
	ring->count_dw--;
	}

	static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,
	void *src, int count_dw)
	{
	unsigned occupied, chunk1, chunk2;
	void *dst;

	if (unlikely(ring->count_dw < count_dw))
	DRM_ERROR("amdgpu: writing more dwords to the ring than expected!\n");

	occupied = ring->wptr & ring->buf_mask;
	dst = (void *)&ring->ring[occupied];
	chunk1 = ring->buf_mask + 1 - occupied;
	chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;
	chunk2 = count_dw - chunk1;
	chunk1 <<= 2;
	chunk2 <<= 2;

	if (chunk1)
	memcpy(dst, src, chunk1);

	if (chunk2) {
	src += chunk1;
	dst = (void *)ring->ring;
	memcpy(dst, src, chunk2);
	}

	ring->wptr += count_dw;
	ring->wptr &= ring->ptr_mask;
	ring->count_dw -= count_dw;
	}

	#endif