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d991ef03 JB |
1 | /************************************************************************** |
2 | * | |
54fbde8a | 3 | * Copyright © 2011-2015 VMware, Inc., Palo Alto, CA., USA |
d991ef03 JB |
4 | * All Rights Reserved. |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | ||
760285e7 | 28 | #include <drm/ttm/ttm_placement.h> |
d991ef03 | 29 | |
760285e7 | 30 | #include <drm/drmP.h> |
d991ef03 JB |
31 | #include "vmwgfx_drv.h" |
32 | ||
33 | ||
34 | /** | |
459d0fa7 | 35 | * vmw_dmabuf_pin_in_placement - Validate a buffer to placement. |
d991ef03 | 36 | * |
b37a6b9a TH |
37 | * @dev_priv: Driver private. |
38 | * @buf: DMA buffer to move. | |
459d0fa7 | 39 | * @placement: The placement to pin it. |
b37a6b9a TH |
40 | * @interruptible: Use interruptible wait. |
41 | * | |
d991ef03 JB |
42 | * Returns |
43 | * -ERESTARTSYS if interrupted by a signal. | |
44 | */ | |
459d0fa7 TH |
45 | int vmw_dmabuf_pin_in_placement(struct vmw_private *dev_priv, |
46 | struct vmw_dma_buffer *buf, | |
47 | struct ttm_placement *placement, | |
48 | bool interruptible) | |
d991ef03 | 49 | { |
d991ef03 JB |
50 | struct ttm_buffer_object *bo = &buf->base; |
51 | int ret; | |
4ed7e224 | 52 | uint32_t new_flags; |
d991ef03 | 53 | |
294adf7d | 54 | ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
d991ef03 JB |
55 | if (unlikely(ret != 0)) |
56 | return ret; | |
57 | ||
c0951b79 | 58 | vmw_execbuf_release_pinned_bo(dev_priv); |
e2fa3a76 | 59 | |
dfd5e50e | 60 | ret = ttm_bo_reserve(bo, interruptible, false, NULL); |
d991ef03 JB |
61 | if (unlikely(ret != 0)) |
62 | goto err; | |
63 | ||
4ed7e224 SY |
64 | if (buf->pin_count > 0) |
65 | ret = ttm_bo_mem_compat(placement, &bo->mem, | |
66 | &new_flags) == true ? 0 : -EINVAL; | |
67 | else | |
68 | ret = ttm_bo_validate(bo, placement, interruptible, false); | |
69 | ||
459d0fa7 TH |
70 | if (!ret) |
71 | vmw_bo_pin_reserved(buf, true); | |
d991ef03 JB |
72 | |
73 | ttm_bo_unreserve(bo); | |
74 | ||
75 | err: | |
294adf7d | 76 | ttm_write_unlock(&dev_priv->reservation_sem); |
d991ef03 JB |
77 | return ret; |
78 | } | |
79 | ||
80 | /** | |
459d0fa7 | 81 | * vmw_dmabuf_pin_in_vram_or_gmr - Move a buffer to vram or gmr. |
d991ef03 | 82 | * |
459d0fa7 TH |
83 | * This function takes the reservation_sem in write mode. |
84 | * Flushes and unpins the query bo to avoid failures. | |
d991ef03 JB |
85 | * |
86 | * @dev_priv: Driver private. | |
87 | * @buf: DMA buffer to move. | |
88 | * @pin: Pin buffer if true. | |
89 | * @interruptible: Use interruptible wait. | |
90 | * | |
91 | * Returns | |
92 | * -ERESTARTSYS if interrupted by a signal. | |
93 | */ | |
459d0fa7 TH |
94 | int vmw_dmabuf_pin_in_vram_or_gmr(struct vmw_private *dev_priv, |
95 | struct vmw_dma_buffer *buf, | |
96 | bool interruptible) | |
d991ef03 | 97 | { |
d991ef03 | 98 | struct ttm_buffer_object *bo = &buf->base; |
d991ef03 | 99 | int ret; |
4ed7e224 | 100 | uint32_t new_flags; |
d991ef03 | 101 | |
294adf7d | 102 | ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
d991ef03 JB |
103 | if (unlikely(ret != 0)) |
104 | return ret; | |
105 | ||
459d0fa7 | 106 | vmw_execbuf_release_pinned_bo(dev_priv); |
e2fa3a76 | 107 | |
dfd5e50e | 108 | ret = ttm_bo_reserve(bo, interruptible, false, NULL); |
d991ef03 JB |
109 | if (unlikely(ret != 0)) |
110 | goto err; | |
111 | ||
4ed7e224 SY |
112 | if (buf->pin_count > 0) { |
113 | ret = ttm_bo_mem_compat(&vmw_vram_gmr_placement, &bo->mem, | |
114 | &new_flags) == true ? 0 : -EINVAL; | |
115 | goto out_unreserve; | |
116 | } | |
117 | ||
459d0fa7 TH |
118 | ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, interruptible, |
119 | false); | |
d991ef03 | 120 | if (likely(ret == 0) || ret == -ERESTARTSYS) |
459d0fa7 | 121 | goto out_unreserve; |
d991ef03 | 122 | |
459d0fa7 | 123 | ret = ttm_bo_validate(bo, &vmw_vram_placement, interruptible, false); |
d991ef03 | 124 | |
459d0fa7 TH |
125 | out_unreserve: |
126 | if (!ret) | |
127 | vmw_bo_pin_reserved(buf, true); | |
d991ef03 | 128 | |
d991ef03 JB |
129 | ttm_bo_unreserve(bo); |
130 | err: | |
294adf7d | 131 | ttm_write_unlock(&dev_priv->reservation_sem); |
d991ef03 JB |
132 | return ret; |
133 | } | |
134 | ||
135 | /** | |
459d0fa7 | 136 | * vmw_dmabuf_pin_in_vram - Move a buffer to vram. |
d991ef03 | 137 | * |
459d0fa7 TH |
138 | * This function takes the reservation_sem in write mode. |
139 | * Flushes and unpins the query bo to avoid failures. | |
d991ef03 JB |
140 | * |
141 | * @dev_priv: Driver private. | |
142 | * @buf: DMA buffer to move. | |
d991ef03 JB |
143 | * @interruptible: Use interruptible wait. |
144 | * | |
145 | * Returns | |
146 | * -ERESTARTSYS if interrupted by a signal. | |
147 | */ | |
459d0fa7 TH |
148 | int vmw_dmabuf_pin_in_vram(struct vmw_private *dev_priv, |
149 | struct vmw_dma_buffer *buf, | |
150 | bool interruptible) | |
d991ef03 | 151 | { |
459d0fa7 TH |
152 | return vmw_dmabuf_pin_in_placement(dev_priv, buf, &vmw_vram_placement, |
153 | interruptible); | |
d991ef03 JB |
154 | } |
155 | ||
156 | /** | |
459d0fa7 | 157 | * vmw_dmabuf_pin_in_start_of_vram - Move a buffer to start of vram. |
d991ef03 | 158 | * |
459d0fa7 TH |
159 | * This function takes the reservation_sem in write mode. |
160 | * Flushes and unpins the query bo to avoid failures. | |
d991ef03 JB |
161 | * |
162 | * @dev_priv: Driver private. | |
459d0fa7 | 163 | * @buf: DMA buffer to pin. |
d991ef03 JB |
164 | * @interruptible: Use interruptible wait. |
165 | * | |
166 | * Returns | |
167 | * -ERESTARTSYS if interrupted by a signal. | |
168 | */ | |
459d0fa7 TH |
169 | int vmw_dmabuf_pin_in_start_of_vram(struct vmw_private *dev_priv, |
170 | struct vmw_dma_buffer *buf, | |
171 | bool interruptible) | |
d991ef03 | 172 | { |
d991ef03 JB |
173 | struct ttm_buffer_object *bo = &buf->base; |
174 | struct ttm_placement placement; | |
f1217ed0 | 175 | struct ttm_place place; |
d991ef03 | 176 | int ret = 0; |
4ed7e224 | 177 | uint32_t new_flags; |
d991ef03 | 178 | |
459d0fa7 | 179 | place = vmw_vram_placement.placement[0]; |
f1217ed0 | 180 | place.lpfn = bo->num_pages; |
f1217ed0 CK |
181 | placement.num_placement = 1; |
182 | placement.placement = &place; | |
183 | placement.num_busy_placement = 1; | |
184 | placement.busy_placement = &place; | |
d991ef03 | 185 | |
294adf7d | 186 | ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
d991ef03 JB |
187 | if (unlikely(ret != 0)) |
188 | return ret; | |
189 | ||
459d0fa7 | 190 | vmw_execbuf_release_pinned_bo(dev_priv); |
dfd5e50e | 191 | ret = ttm_bo_reserve(bo, interruptible, false, NULL); |
d991ef03 JB |
192 | if (unlikely(ret != 0)) |
193 | goto err_unlock; | |
194 | ||
459d0fa7 TH |
195 | /* |
196 | * Is this buffer already in vram but not at the start of it? | |
197 | * In that case, evict it first because TTM isn't good at handling | |
198 | * that situation. | |
199 | */ | |
d991ef03 JB |
200 | if (bo->mem.mem_type == TTM_PL_VRAM && |
201 | bo->mem.start < bo->num_pages && | |
4ed7e224 SY |
202 | bo->mem.start > 0 && |
203 | buf->pin_count == 0) | |
97a875cb | 204 | (void) ttm_bo_validate(bo, &vmw_sys_placement, false, false); |
d991ef03 | 205 | |
4ed7e224 SY |
206 | if (buf->pin_count > 0) |
207 | ret = ttm_bo_mem_compat(&placement, &bo->mem, | |
208 | &new_flags) == true ? 0 : -EINVAL; | |
209 | else | |
210 | ret = ttm_bo_validate(bo, &placement, interruptible, false); | |
d991ef03 | 211 | |
459d0fa7 | 212 | /* For some reason we didn't end up at the start of vram */ |
d991ef03 | 213 | WARN_ON(ret == 0 && bo->offset != 0); |
459d0fa7 TH |
214 | if (!ret) |
215 | vmw_bo_pin_reserved(buf, true); | |
d991ef03 JB |
216 | |
217 | ttm_bo_unreserve(bo); | |
218 | err_unlock: | |
294adf7d | 219 | ttm_write_unlock(&dev_priv->reservation_sem); |
d991ef03 JB |
220 | |
221 | return ret; | |
222 | } | |
223 | ||
224 | /** | |
459d0fa7 | 225 | * vmw_dmabuf_unpin - Unpin the buffer given buffer, does not move the buffer. |
d991ef03 | 226 | * |
459d0fa7 | 227 | * This function takes the reservation_sem in write mode. |
d991ef03 JB |
228 | * |
229 | * @dev_priv: Driver private. | |
230 | * @buf: DMA buffer to unpin. | |
231 | * @interruptible: Use interruptible wait. | |
232 | * | |
233 | * Returns | |
234 | * -ERESTARTSYS if interrupted by a signal. | |
235 | */ | |
236 | int vmw_dmabuf_unpin(struct vmw_private *dev_priv, | |
237 | struct vmw_dma_buffer *buf, | |
238 | bool interruptible) | |
239 | { | |
459d0fa7 TH |
240 | struct ttm_buffer_object *bo = &buf->base; |
241 | int ret; | |
d991ef03 | 242 | |
459d0fa7 TH |
243 | ret = ttm_read_lock(&dev_priv->reservation_sem, interruptible); |
244 | if (unlikely(ret != 0)) | |
245 | return ret; | |
246 | ||
dfd5e50e | 247 | ret = ttm_bo_reserve(bo, interruptible, false, NULL); |
459d0fa7 TH |
248 | if (unlikely(ret != 0)) |
249 | goto err; | |
250 | ||
251 | vmw_bo_pin_reserved(buf, false); | |
252 | ||
253 | ttm_bo_unreserve(bo); | |
254 | ||
255 | err: | |
256 | ttm_read_unlock(&dev_priv->reservation_sem); | |
257 | return ret; | |
258 | } | |
b37a6b9a | 259 | |
d991ef03 | 260 | /** |
b37a6b9a TH |
261 | * vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement |
262 | * of a buffer. | |
d991ef03 | 263 | * |
b37a6b9a TH |
264 | * @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved. |
265 | * @ptr: SVGAGuestPtr returning the result. | |
d991ef03 | 266 | */ |
b37a6b9a TH |
267 | void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo, |
268 | SVGAGuestPtr *ptr) | |
d991ef03 | 269 | { |
b37a6b9a | 270 | if (bo->mem.mem_type == TTM_PL_VRAM) { |
d991ef03 | 271 | ptr->gmrId = SVGA_GMR_FRAMEBUFFER; |
b37a6b9a | 272 | ptr->offset = bo->offset; |
d991ef03 | 273 | } else { |
b37a6b9a | 274 | ptr->gmrId = bo->mem.start; |
d991ef03 JB |
275 | ptr->offset = 0; |
276 | } | |
277 | } | |
e2fa3a76 TH |
278 | |
279 | ||
280 | /** | |
459d0fa7 | 281 | * vmw_bo_pin_reserved - Pin or unpin a buffer object without moving it. |
e2fa3a76 | 282 | * |
459d0fa7 | 283 | * @vbo: The buffer object. Must be reserved. |
e2fa3a76 TH |
284 | * @pin: Whether to pin or unpin. |
285 | * | |
286 | */ | |
459d0fa7 | 287 | void vmw_bo_pin_reserved(struct vmw_dma_buffer *vbo, bool pin) |
e2fa3a76 | 288 | { |
f1217ed0 | 289 | struct ttm_place pl; |
e2fa3a76 | 290 | struct ttm_placement placement; |
459d0fa7 | 291 | struct ttm_buffer_object *bo = &vbo->base; |
e2fa3a76 TH |
292 | uint32_t old_mem_type = bo->mem.mem_type; |
293 | int ret; | |
294 | ||
8bd4ce56 | 295 | lockdep_assert_held(&bo->resv->lock.base); |
e2fa3a76 | 296 | |
459d0fa7 TH |
297 | if (pin) { |
298 | if (vbo->pin_count++ > 0) | |
299 | return; | |
300 | } else { | |
301 | WARN_ON(vbo->pin_count <= 0); | |
302 | if (--vbo->pin_count > 0) | |
303 | return; | |
304 | } | |
305 | ||
f1217ed0 CK |
306 | pl.fpfn = 0; |
307 | pl.lpfn = 0; | |
308 | pl.flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | VMW_PL_FLAG_MOB | |
4b9e45e6 | 309 | | TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; |
e2fa3a76 | 310 | if (pin) |
f1217ed0 | 311 | pl.flags |= TTM_PL_FLAG_NO_EVICT; |
e2fa3a76 TH |
312 | |
313 | memset(&placement, 0, sizeof(placement)); | |
314 | placement.num_placement = 1; | |
f1217ed0 | 315 | placement.placement = &pl; |
e2fa3a76 | 316 | |
97a875cb | 317 | ret = ttm_bo_validate(bo, &placement, false, true); |
e2fa3a76 TH |
318 | |
319 | BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type); | |
320 | } |