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1 | /* |
2 | * Copyright © 2014 Intel Corporation | |
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 (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Please try to maintain the following order within this file unless it makes | |
24 | * sense to do otherwise. From top to bottom: | |
25 | * 1. typedefs | |
26 | * 2. #defines, and macros | |
27 | * 3. structure definitions | |
28 | * 4. function prototypes | |
29 | * | |
30 | * Within each section, please try to order by generation in ascending order, | |
31 | * from top to bottom (ie. gen6 on the top, gen8 on the bottom). | |
32 | */ | |
33 | ||
34 | #ifndef __I915_GEM_GTT_H__ | |
35 | #define __I915_GEM_GTT_H__ | |
36 | ||
37 | typedef uint32_t gen6_gtt_pte_t; | |
38 | typedef uint64_t gen8_gtt_pte_t; | |
39 | typedef gen8_gtt_pte_t gen8_ppgtt_pde_t; | |
40 | ||
41 | #define gtt_total_entries(gtt) ((gtt).base.total >> PAGE_SHIFT) | |
42 | ||
43 | #define I915_PPGTT_PT_ENTRIES (PAGE_SIZE / sizeof(gen6_gtt_pte_t)) | |
44 | /* gen6-hsw has bit 11-4 for physical addr bit 39-32 */ | |
45 | #define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0)) | |
46 | #define GEN6_PTE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr) | |
47 | #define GEN6_PDE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr) | |
48 | #define GEN6_PTE_CACHE_LLC (2 << 1) | |
49 | #define GEN6_PTE_UNCACHED (1 << 1) | |
50 | #define GEN6_PTE_VALID (1 << 0) | |
51 | ||
52 | #define GEN6_PPGTT_PD_ENTRIES 512 | |
53 | #define GEN6_PD_SIZE (GEN6_PPGTT_PD_ENTRIES * PAGE_SIZE) | |
54 | #define GEN6_PD_ALIGN (PAGE_SIZE * 16) | |
55 | #define GEN6_PDE_VALID (1 << 0) | |
56 | ||
57 | #define GEN7_PTE_CACHE_L3_LLC (3 << 1) | |
58 | ||
59 | #define BYT_PTE_SNOOPED_BY_CPU_CACHES (1 << 2) | |
60 | #define BYT_PTE_WRITEABLE (1 << 1) | |
61 | ||
62 | /* Cacheability Control is a 4-bit value. The low three bits are stored in bits | |
63 | * 3:1 of the PTE, while the fourth bit is stored in bit 11 of the PTE. | |
64 | */ | |
65 | #define HSW_CACHEABILITY_CONTROL(bits) ((((bits) & 0x7) << 1) | \ | |
66 | (((bits) & 0x8) << (11 - 3))) | |
67 | #define HSW_WB_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x2) | |
68 | #define HSW_WB_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x3) | |
69 | #define HSW_WB_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x8) | |
70 | #define HSW_WB_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0xb) | |
71 | #define HSW_WT_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x7) | |
72 | #define HSW_WT_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x6) | |
73 | #define HSW_PTE_UNCACHED (0) | |
74 | #define HSW_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0x7f0)) | |
75 | #define HSW_PTE_ADDR_ENCODE(addr) HSW_GTT_ADDR_ENCODE(addr) | |
76 | ||
77 | /* GEN8 legacy style address is defined as a 3 level page table: | |
78 | * 31:30 | 29:21 | 20:12 | 11:0 | |
79 | * PDPE | PDE | PTE | offset | |
80 | * The difference as compared to normal x86 3 level page table is the PDPEs are | |
81 | * programmed via register. | |
82 | */ | |
83 | #define GEN8_PDPE_SHIFT 30 | |
84 | #define GEN8_PDPE_MASK 0x3 | |
85 | #define GEN8_PDE_SHIFT 21 | |
86 | #define GEN8_PDE_MASK 0x1ff | |
87 | #define GEN8_PTE_SHIFT 12 | |
88 | #define GEN8_PTE_MASK 0x1ff | |
89 | #define GEN8_LEGACY_PDPS 4 | |
90 | #define GEN8_PTES_PER_PAGE (PAGE_SIZE / sizeof(gen8_gtt_pte_t)) | |
91 | #define GEN8_PDES_PER_PAGE (PAGE_SIZE / sizeof(gen8_ppgtt_pde_t)) | |
92 | ||
93 | #define PPAT_UNCACHED_INDEX (_PAGE_PWT | _PAGE_PCD) | |
94 | #define PPAT_CACHED_PDE_INDEX 0 /* WB LLC */ | |
95 | #define PPAT_CACHED_INDEX _PAGE_PAT /* WB LLCeLLC */ | |
96 | #define PPAT_DISPLAY_ELLC_INDEX _PAGE_PCD /* WT eLLC */ | |
97 | ||
ee0ce478 | 98 | #define CHV_PPAT_SNOOP (1<<6) |
0260c420 BW |
99 | #define GEN8_PPAT_AGE(x) (x<<4) |
100 | #define GEN8_PPAT_LLCeLLC (3<<2) | |
101 | #define GEN8_PPAT_LLCELLC (2<<2) | |
102 | #define GEN8_PPAT_LLC (1<<2) | |
103 | #define GEN8_PPAT_WB (3<<0) | |
104 | #define GEN8_PPAT_WT (2<<0) | |
105 | #define GEN8_PPAT_WC (1<<0) | |
106 | #define GEN8_PPAT_UC (0<<0) | |
107 | #define GEN8_PPAT_ELLC_OVERRIDE (0<<2) | |
108 | #define GEN8_PPAT(i, x) ((uint64_t) (x) << ((i) * 8)) | |
109 | ||
110 | enum i915_cache_level; | |
111 | /** | |
112 | * A VMA represents a GEM BO that is bound into an address space. Therefore, a | |
113 | * VMA's presence cannot be guaranteed before binding, or after unbinding the | |
114 | * object into/from the address space. | |
115 | * | |
116 | * To make things as simple as possible (ie. no refcounting), a VMA's lifetime | |
117 | * will always be <= an objects lifetime. So object refcounting should cover us. | |
118 | */ | |
119 | struct i915_vma { | |
120 | struct drm_mm_node node; | |
121 | struct drm_i915_gem_object *obj; | |
122 | struct i915_address_space *vm; | |
123 | ||
124 | /** This object's place on the active/inactive lists */ | |
125 | struct list_head mm_list; | |
126 | ||
127 | struct list_head vma_link; /* Link in the object's VMA list */ | |
128 | ||
129 | /** This vma's place in the batchbuffer or on the eviction list */ | |
130 | struct list_head exec_list; | |
131 | ||
132 | /** | |
133 | * Used for performing relocations during execbuffer insertion. | |
134 | */ | |
135 | struct hlist_node exec_node; | |
136 | unsigned long exec_handle; | |
137 | struct drm_i915_gem_exec_object2 *exec_entry; | |
138 | ||
139 | /** | |
140 | * How many users have pinned this object in GTT space. The following | |
141 | * users can each hold at most one reference: pwrite/pread, pin_ioctl | |
142 | * (via user_pin_count), execbuffer (objects are not allowed multiple | |
143 | * times for the same batchbuffer), and the framebuffer code. When | |
144 | * switching/pageflipping, the framebuffer code has at most two buffers | |
145 | * pinned per crtc. | |
146 | * | |
147 | * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3 | |
148 | * bits with absolutely no headroom. So use 4 bits. */ | |
149 | unsigned int pin_count:4; | |
150 | #define DRM_I915_GEM_OBJECT_MAX_PIN_COUNT 0xf | |
151 | ||
152 | /** Unmap an object from an address space. This usually consists of | |
153 | * setting the valid PTE entries to a reserved scratch page. */ | |
154 | void (*unbind_vma)(struct i915_vma *vma); | |
155 | /* Map an object into an address space with the given cache flags. */ | |
156 | #define GLOBAL_BIND (1<<0) | |
157 | void (*bind_vma)(struct i915_vma *vma, | |
158 | enum i915_cache_level cache_level, | |
159 | u32 flags); | |
160 | }; | |
161 | ||
162 | struct i915_address_space { | |
163 | struct drm_mm mm; | |
164 | struct drm_device *dev; | |
165 | struct list_head global_link; | |
166 | unsigned long start; /* Start offset always 0 for dri2 */ | |
167 | size_t total; /* size addr space maps (ex. 2GB for ggtt) */ | |
168 | ||
169 | struct { | |
170 | dma_addr_t addr; | |
171 | struct page *page; | |
172 | } scratch; | |
173 | ||
174 | /** | |
175 | * List of objects currently involved in rendering. | |
176 | * | |
177 | * Includes buffers having the contents of their GPU caches | |
178 | * flushed, not necessarily primitives. last_rendering_seqno | |
179 | * represents when the rendering involved will be completed. | |
180 | * | |
181 | * A reference is held on the buffer while on this list. | |
182 | */ | |
183 | struct list_head active_list; | |
184 | ||
185 | /** | |
186 | * LRU list of objects which are not in the ringbuffer and | |
187 | * are ready to unbind, but are still in the GTT. | |
188 | * | |
189 | * last_rendering_seqno is 0 while an object is in this list. | |
190 | * | |
191 | * A reference is not held on the buffer while on this list, | |
192 | * as merely being GTT-bound shouldn't prevent its being | |
193 | * freed, and we'll pull it off the list in the free path. | |
194 | */ | |
195 | struct list_head inactive_list; | |
196 | ||
197 | /* FIXME: Need a more generic return type */ | |
198 | gen6_gtt_pte_t (*pte_encode)(dma_addr_t addr, | |
199 | enum i915_cache_level level, | |
200 | bool valid); /* Create a valid PTE */ | |
201 | void (*clear_range)(struct i915_address_space *vm, | |
202 | uint64_t start, | |
203 | uint64_t length, | |
204 | bool use_scratch); | |
205 | void (*insert_entries)(struct i915_address_space *vm, | |
206 | struct sg_table *st, | |
207 | uint64_t start, | |
208 | enum i915_cache_level cache_level); | |
209 | void (*cleanup)(struct i915_address_space *vm); | |
210 | }; | |
211 | ||
212 | /* The Graphics Translation Table is the way in which GEN hardware translates a | |
213 | * Graphics Virtual Address into a Physical Address. In addition to the normal | |
214 | * collateral associated with any va->pa translations GEN hardware also has a | |
215 | * portion of the GTT which can be mapped by the CPU and remain both coherent | |
216 | * and correct (in cases like swizzling). That region is referred to as GMADR in | |
217 | * the spec. | |
218 | */ | |
219 | struct i915_gtt { | |
220 | struct i915_address_space base; | |
221 | size_t stolen_size; /* Total size of stolen memory */ | |
222 | ||
223 | unsigned long mappable_end; /* End offset that we can CPU map */ | |
224 | struct io_mapping *mappable; /* Mapping to our CPU mappable region */ | |
225 | phys_addr_t mappable_base; /* PA of our GMADR */ | |
226 | ||
227 | /** "Graphics Stolen Memory" holds the global PTEs */ | |
228 | void __iomem *gsm; | |
229 | ||
230 | bool do_idle_maps; | |
231 | ||
232 | int mtrr; | |
233 | ||
234 | /* global gtt ops */ | |
235 | int (*gtt_probe)(struct drm_device *dev, size_t *gtt_total, | |
236 | size_t *stolen, phys_addr_t *mappable_base, | |
237 | unsigned long *mappable_end); | |
238 | }; | |
239 | ||
240 | struct i915_hw_ppgtt { | |
241 | struct i915_address_space base; | |
242 | struct kref ref; | |
243 | struct drm_mm_node node; | |
244 | unsigned num_pd_entries; | |
245 | unsigned num_pd_pages; /* gen8+ */ | |
246 | union { | |
247 | struct page **pt_pages; | |
248 | struct page **gen8_pt_pages[GEN8_LEGACY_PDPS]; | |
249 | }; | |
250 | struct page *pd_pages; | |
251 | union { | |
252 | uint32_t pd_offset; | |
253 | dma_addr_t pd_dma_addr[GEN8_LEGACY_PDPS]; | |
254 | }; | |
255 | union { | |
256 | dma_addr_t *pt_dma_addr; | |
257 | dma_addr_t *gen8_pt_dma_addr[4]; | |
258 | }; | |
259 | ||
260 | struct i915_hw_context *ctx; | |
261 | ||
262 | int (*enable)(struct i915_hw_ppgtt *ppgtt); | |
263 | int (*switch_mm)(struct i915_hw_ppgtt *ppgtt, | |
264 | struct intel_ring_buffer *ring, | |
265 | bool synchronous); | |
266 | void (*debug_dump)(struct i915_hw_ppgtt *ppgtt, struct seq_file *m); | |
267 | }; | |
268 | ||
269 | int i915_gem_gtt_init(struct drm_device *dev); | |
270 | void i915_gem_init_global_gtt(struct drm_device *dev); | |
271 | void i915_gem_setup_global_gtt(struct drm_device *dev, unsigned long start, | |
272 | unsigned long mappable_end, unsigned long end); | |
273 | ||
274 | bool intel_enable_ppgtt(struct drm_device *dev, bool full); | |
275 | int i915_gem_init_ppgtt(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt); | |
276 | ||
277 | void i915_check_and_clear_faults(struct drm_device *dev); | |
278 | void i915_gem_suspend_gtt_mappings(struct drm_device *dev); | |
279 | void i915_gem_restore_gtt_mappings(struct drm_device *dev); | |
280 | ||
281 | int __must_check i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj); | |
282 | void i915_gem_gtt_finish_object(struct drm_i915_gem_object *obj); | |
283 | ||
284 | #endif |