1 /*
2  * Copyright 2016 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  */
23 
24 #ifndef __AMDGPU_TTM_H__
25 #define __AMDGPU_TTM_H__
26 
27 #include <linux/dma-direction.h>
28 #include <drm/gpu_scheduler.h>
29 #include "amdgpu_vram_mgr.h"
30 #include "amdgpu.h"
31 
32 #define AMDGPU_PL_GDS		(TTM_PL_PRIV + 0)
33 #define AMDGPU_PL_GWS		(TTM_PL_PRIV + 1)
34 #define AMDGPU_PL_OA		(TTM_PL_PRIV + 2)
35 #define AMDGPU_PL_PREEMPT	(TTM_PL_PRIV + 3)
36 #define AMDGPU_PL_DOORBELL	(TTM_PL_PRIV + 4)
37 
38 #define AMDGPU_GTT_MAX_TRANSFER_SIZE	512
39 #define AMDGPU_GTT_NUM_TRANSFER_WINDOWS	2
40 
41 #define AMDGPU_POISON	0xd0bed0be
42 
43 extern const struct attribute_group amdgpu_vram_mgr_attr_group;
44 extern const struct attribute_group amdgpu_gtt_mgr_attr_group;
45 
46 struct hmm_range;
47 
48 struct amdgpu_gtt_mgr {
49 	struct ttm_resource_manager manager;
50 	struct drm_mm mm;
51 	spinlock_t lock;
52 };
53 
54 struct amdgpu_mman {
55 	struct ttm_device		bdev;
56 	struct ttm_pool			*ttm_pools;
57 	bool				initialized;
58 	void __iomem			*aper_base_kaddr;
59 
60 	/* buffer handling */
61 	const struct amdgpu_buffer_funcs	*buffer_funcs;
62 	struct amdgpu_ring			*buffer_funcs_ring;
63 	bool					buffer_funcs_enabled;
64 
65 	struct mutex				gtt_window_lock;
66 	/* High priority scheduler entity for buffer moves */
67 	struct drm_sched_entity			high_pr;
68 	/* Low priority scheduler entity for VRAM clearing */
69 	struct drm_sched_entity			low_pr;
70 
71 	struct amdgpu_vram_mgr vram_mgr;
72 	struct amdgpu_gtt_mgr gtt_mgr;
73 	struct ttm_resource_manager preempt_mgr;
74 
75 	uint64_t		stolen_vga_size;
76 	struct amdgpu_bo	*stolen_vga_memory;
77 	uint64_t		stolen_extended_size;
78 	struct amdgpu_bo	*stolen_extended_memory;
79 	bool			keep_stolen_vga_memory;
80 
81 	struct amdgpu_bo	*stolen_reserved_memory;
82 	uint64_t		stolen_reserved_offset;
83 	uint64_t		stolen_reserved_size;
84 
85 	/* discovery */
86 	uint8_t				*discovery_bin;
87 	uint32_t			discovery_tmr_size;
88 	/* fw reserved memory */
89 	struct amdgpu_bo		*fw_reserved_memory;
90 
91 	/* firmware VRAM reservation */
92 	u64		fw_vram_usage_start_offset;
93 	u64		fw_vram_usage_size;
94 	struct amdgpu_bo	*fw_vram_usage_reserved_bo;
95 	void		*fw_vram_usage_va;
96 
97 	/* driver VRAM reservation */
98 	u64		drv_vram_usage_start_offset;
99 	u64		drv_vram_usage_size;
100 	struct amdgpu_bo	*drv_vram_usage_reserved_bo;
101 	void		*drv_vram_usage_va;
102 
103 	/* PAGE_SIZE'd BO for process memory r/w over SDMA. */
104 	struct amdgpu_bo	*sdma_access_bo;
105 	void			*sdma_access_ptr;
106 };
107 
108 struct amdgpu_copy_mem {
109 	struct ttm_buffer_object	*bo;
110 	struct ttm_resource		*mem;
111 	unsigned long			offset;
112 };
113 
114 int amdgpu_gtt_mgr_init(struct amdgpu_device *adev, uint64_t gtt_size);
115 void amdgpu_gtt_mgr_fini(struct amdgpu_device *adev);
116 int amdgpu_preempt_mgr_init(struct amdgpu_device *adev);
117 void amdgpu_preempt_mgr_fini(struct amdgpu_device *adev);
118 int amdgpu_vram_mgr_init(struct amdgpu_device *adev);
119 void amdgpu_vram_mgr_fini(struct amdgpu_device *adev);
120 
121 bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *mem);
122 void amdgpu_gtt_mgr_recover(struct amdgpu_gtt_mgr *mgr);
123 
124 uint64_t amdgpu_preempt_mgr_usage(struct ttm_resource_manager *man);
125 
126 u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo);
127 int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
128 			      struct ttm_resource *mem,
129 			      u64 offset, u64 size,
130 			      struct device *dev,
131 			      enum dma_data_direction dir,
132 			      struct sg_table **sgt);
133 void amdgpu_vram_mgr_free_sgt(struct device *dev,
134 			      enum dma_data_direction dir,
135 			      struct sg_table *sgt);
136 uint64_t amdgpu_vram_mgr_vis_usage(struct amdgpu_vram_mgr *mgr);
137 int amdgpu_vram_mgr_reserve_range(struct amdgpu_vram_mgr *mgr,
138 				  uint64_t start, uint64_t size);
139 int amdgpu_vram_mgr_query_page_status(struct amdgpu_vram_mgr *mgr,
140 				      uint64_t start);
141 
142 int amdgpu_ttm_init(struct amdgpu_device *adev);
143 void amdgpu_ttm_fini(struct amdgpu_device *adev);
144 void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev,
145 					bool enable);
146 
147 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
148 		       uint64_t dst_offset, uint32_t byte_count,
149 		       struct dma_resv *resv,
150 		       struct dma_fence **fence, bool direct_submit,
151 		       bool vm_needs_flush, bool tmz);
152 int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
153 			       const struct amdgpu_copy_mem *src,
154 			       const struct amdgpu_copy_mem *dst,
155 			       uint64_t size, bool tmz,
156 			       struct dma_resv *resv,
157 			       struct dma_fence **f);
158 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
159 			uint32_t src_data,
160 			struct dma_resv *resv,
161 			struct dma_fence **fence,
162 			bool delayed);
163 
164 int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo);
165 void amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo);
166 uint64_t amdgpu_ttm_domain_start(struct amdgpu_device *adev, uint32_t type);
167 
168 #if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
169 int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages,
170 				 struct hmm_range **range);
171 void amdgpu_ttm_tt_discard_user_pages(struct ttm_tt *ttm,
172 				      struct hmm_range *range);
173 bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm,
174 				       struct hmm_range *range);
175 #else
176 static inline int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo,
177 					       struct page **pages,
178 					       struct hmm_range **range)
179 {
180 	return -EPERM;
181 }
182 static inline void amdgpu_ttm_tt_discard_user_pages(struct ttm_tt *ttm,
183 						    struct hmm_range *range)
184 {
185 }
186 static inline bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm,
187 						     struct hmm_range *range)
188 {
189 	return false;
190 }
191 #endif
192 
193 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages);
194 int amdgpu_ttm_tt_get_userptr(const struct ttm_buffer_object *tbo,
195 			      uint64_t *user_addr);
196 int amdgpu_ttm_tt_set_userptr(struct ttm_buffer_object *bo,
197 			      uint64_t addr, uint32_t flags);
198 bool amdgpu_ttm_tt_has_userptr(struct ttm_tt *ttm);
199 struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm);
200 bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
201 				  unsigned long end, unsigned long *userptr);
202 bool amdgpu_ttm_tt_userptr_invalidated(struct ttm_tt *ttm,
203 				       int *last_invalidated);
204 bool amdgpu_ttm_tt_is_userptr(struct ttm_tt *ttm);
205 bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm);
206 uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_resource *mem);
207 uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
208 				 struct ttm_resource *mem);
209 int amdgpu_ttm_evict_resources(struct amdgpu_device *adev, int mem_type);
210 
211 void amdgpu_ttm_debugfs_init(struct amdgpu_device *adev);
212 
213 #endif
214