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Release 4.11 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h

/*
 * 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		16

#define AMDGPU_MAX_GFX_RINGS		1

#define AMDGPU_MAX_COMPUTE_RINGS	8

#define AMDGPU_MAX_VCE_RINGS		3

/* 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
};

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);

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;

	/* ring read/write ptr handling */
	
u32 (*get_rptr)(struct amdgpu_ring *ring);
	
u32 (*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);
	/* 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);
};


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 amdgpu_bo	*ring_obj;
	
volatile uint32_t	*ring;
	
unsigned		rptr_offs;
	
unsigned		wptr;
	
unsigned		wptr_old;
	
unsigned		ring_size;
	
unsigned		max_dw;
	
int			count_dw;
	
uint64_t		gpu_addr;
	
uint32_t		ptr_mask;
	
bool			ready;
	
u32			idx;
	
u32			me;
	
u32			pipe;
	
u32			queue;
	
struct amdgpu_bo	*mqd_obj;
	
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;
#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);

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Christian König79795.56%457.14%
Xiangliang Yu333.96%114.29%
Dave Airlie20.24%114.29%
Trigger Huang20.24%114.29%
Total834100.00%7100.00%
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