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d991ef03 JB |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2011 VMware, Inc., Palo Alto, CA., USA | |
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 | /** | |
b37a6b9a | 35 | * vmw_dmabuf_to_placement - Validate a buffer to placement. |
d991ef03 | 36 | * |
b37a6b9a TH |
37 | * @dev_priv: Driver private. |
38 | * @buf: DMA buffer to move. | |
39 | * @pin: Pin buffer if true. | |
40 | * @interruptible: Use interruptible wait. | |
41 | * | |
42 | * May only be called by the current master since it assumes that the | |
43 | * master lock is the current master's lock. | |
44 | * This function takes the master's lock in write mode. | |
e2fa3a76 | 45 | * Flushes and unpins the query bo to avoid failures. |
d991ef03 JB |
46 | * |
47 | * Returns | |
48 | * -ERESTARTSYS if interrupted by a signal. | |
49 | */ | |
50 | int vmw_dmabuf_to_placement(struct vmw_private *dev_priv, | |
51 | struct vmw_dma_buffer *buf, | |
52 | struct ttm_placement *placement, | |
53 | bool interruptible) | |
54 | { | |
d991ef03 JB |
55 | struct ttm_buffer_object *bo = &buf->base; |
56 | int ret; | |
57 | ||
294adf7d | 58 | ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
d991ef03 JB |
59 | if (unlikely(ret != 0)) |
60 | return ret; | |
61 | ||
c0951b79 | 62 | vmw_execbuf_release_pinned_bo(dev_priv); |
e2fa3a76 | 63 | |
ee3939e0 | 64 | ret = ttm_bo_reserve(bo, interruptible, false, false, NULL); |
d991ef03 JB |
65 | if (unlikely(ret != 0)) |
66 | goto err; | |
67 | ||
97a875cb | 68 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
d991ef03 JB |
69 | |
70 | ttm_bo_unreserve(bo); | |
71 | ||
72 | err: | |
294adf7d | 73 | ttm_write_unlock(&dev_priv->reservation_sem); |
d991ef03 JB |
74 | return ret; |
75 | } | |
76 | ||
77 | /** | |
b37a6b9a | 78 | * vmw_dmabuf_to_vram_or_gmr - Move a buffer to vram or gmr. |
d991ef03 | 79 | * |
b37a6b9a TH |
80 | * May only be called by the current master since it assumes that the |
81 | * master lock is the current master's lock. | |
82 | * This function takes the master's lock in write mode. | |
e2fa3a76 | 83 | * Flushes and unpins the query bo if @pin == true to avoid failures. |
d991ef03 JB |
84 | * |
85 | * @dev_priv: Driver private. | |
86 | * @buf: DMA buffer to move. | |
87 | * @pin: Pin buffer if true. | |
88 | * @interruptible: Use interruptible wait. | |
89 | * | |
90 | * Returns | |
91 | * -ERESTARTSYS if interrupted by a signal. | |
92 | */ | |
93 | int vmw_dmabuf_to_vram_or_gmr(struct vmw_private *dev_priv, | |
94 | struct vmw_dma_buffer *buf, | |
95 | bool pin, bool interruptible) | |
96 | { | |
d991ef03 JB |
97 | struct ttm_buffer_object *bo = &buf->base; |
98 | struct ttm_placement *placement; | |
99 | int ret; | |
100 | ||
294adf7d | 101 | ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
d991ef03 JB |
102 | if (unlikely(ret != 0)) |
103 | return ret; | |
104 | ||
e2fa3a76 | 105 | if (pin) |
c0951b79 | 106 | vmw_execbuf_release_pinned_bo(dev_priv); |
e2fa3a76 | 107 | |
ee3939e0 | 108 | ret = ttm_bo_reserve(bo, interruptible, false, false, NULL); |
d991ef03 JB |
109 | if (unlikely(ret != 0)) |
110 | goto err; | |
111 | ||
112 | /** | |
113 | * Put BO in VRAM if there is space, otherwise as a GMR. | |
114 | * If there is no space in VRAM and GMR ids are all used up, | |
115 | * start evicting GMRs to make room. If the DMA buffer can't be | |
116 | * used as a GMR, this will return -ENOMEM. | |
117 | */ | |
118 | ||
119 | if (pin) | |
120 | placement = &vmw_vram_gmr_ne_placement; | |
121 | else | |
122 | placement = &vmw_vram_gmr_placement; | |
123 | ||
97a875cb | 124 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
d991ef03 JB |
125 | if (likely(ret == 0) || ret == -ERESTARTSYS) |
126 | goto err_unreserve; | |
127 | ||
128 | ||
129 | /** | |
130 | * If that failed, try VRAM again, this time evicting | |
131 | * previous contents. | |
132 | */ | |
133 | ||
134 | if (pin) | |
135 | placement = &vmw_vram_ne_placement; | |
136 | else | |
137 | placement = &vmw_vram_placement; | |
138 | ||
97a875cb | 139 | ret = ttm_bo_validate(bo, placement, interruptible, false); |
d991ef03 JB |
140 | |
141 | err_unreserve: | |
142 | ttm_bo_unreserve(bo); | |
143 | err: | |
294adf7d | 144 | ttm_write_unlock(&dev_priv->reservation_sem); |
d991ef03 JB |
145 | return ret; |
146 | } | |
147 | ||
148 | /** | |
b37a6b9a | 149 | * vmw_dmabuf_to_vram - Move a buffer to vram. |
d991ef03 | 150 | * |
b37a6b9a TH |
151 | * May only be called by the current master since it assumes that the |
152 | * master lock is the current master's lock. | |
153 | * This function takes the master's lock in write mode. | |
d991ef03 JB |
154 | * |
155 | * @dev_priv: Driver private. | |
156 | * @buf: DMA buffer to move. | |
157 | * @pin: Pin buffer in vram if true. | |
158 | * @interruptible: Use interruptible wait. | |
159 | * | |
160 | * Returns | |
161 | * -ERESTARTSYS if interrupted by a signal. | |
162 | */ | |
163 | int vmw_dmabuf_to_vram(struct vmw_private *dev_priv, | |
164 | struct vmw_dma_buffer *buf, | |
165 | bool pin, bool interruptible) | |
166 | { | |
167 | struct ttm_placement *placement; | |
168 | ||
169 | if (pin) | |
170 | placement = &vmw_vram_ne_placement; | |
171 | else | |
172 | placement = &vmw_vram_placement; | |
173 | ||
174 | return vmw_dmabuf_to_placement(dev_priv, buf, | |
175 | placement, | |
176 | interruptible); | |
177 | } | |
178 | ||
179 | /** | |
b37a6b9a | 180 | * vmw_dmabuf_to_start_of_vram - Move a buffer to start of vram. |
d991ef03 | 181 | * |
b37a6b9a TH |
182 | * May only be called by the current master since it assumes that the |
183 | * master lock is the current master's lock. | |
184 | * This function takes the master's lock in write mode. | |
e2fa3a76 | 185 | * Flushes and unpins the query bo if @pin == true to avoid failures. |
d991ef03 JB |
186 | * |
187 | * @dev_priv: Driver private. | |
188 | * @buf: DMA buffer to move. | |
189 | * @pin: Pin buffer in vram if true. | |
190 | * @interruptible: Use interruptible wait. | |
191 | * | |
192 | * Returns | |
193 | * -ERESTARTSYS if interrupted by a signal. | |
194 | */ | |
195 | int vmw_dmabuf_to_start_of_vram(struct vmw_private *dev_priv, | |
196 | struct vmw_dma_buffer *buf, | |
197 | bool pin, bool interruptible) | |
198 | { | |
d991ef03 JB |
199 | struct ttm_buffer_object *bo = &buf->base; |
200 | struct ttm_placement placement; | |
201 | int ret = 0; | |
202 | ||
203 | if (pin) | |
204 | placement = vmw_vram_ne_placement; | |
205 | else | |
206 | placement = vmw_vram_placement; | |
207 | placement.lpfn = bo->num_pages; | |
208 | ||
294adf7d | 209 | ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible); |
d991ef03 JB |
210 | if (unlikely(ret != 0)) |
211 | return ret; | |
212 | ||
e2fa3a76 | 213 | if (pin) |
c0951b79 | 214 | vmw_execbuf_release_pinned_bo(dev_priv); |
ee3939e0 | 215 | ret = ttm_bo_reserve(bo, interruptible, false, false, NULL); |
d991ef03 JB |
216 | if (unlikely(ret != 0)) |
217 | goto err_unlock; | |
218 | ||
219 | /* Is this buffer already in vram but not at the start of it? */ | |
220 | if (bo->mem.mem_type == TTM_PL_VRAM && | |
221 | bo->mem.start < bo->num_pages && | |
222 | bo->mem.start > 0) | |
97a875cb | 223 | (void) ttm_bo_validate(bo, &vmw_sys_placement, false, false); |
d991ef03 | 224 | |
97a875cb | 225 | ret = ttm_bo_validate(bo, &placement, interruptible, false); |
d991ef03 JB |
226 | |
227 | /* For some reason we didn't up at the start of vram */ | |
228 | WARN_ON(ret == 0 && bo->offset != 0); | |
229 | ||
230 | ttm_bo_unreserve(bo); | |
231 | err_unlock: | |
294adf7d | 232 | ttm_write_unlock(&dev_priv->reservation_sem); |
d991ef03 JB |
233 | |
234 | return ret; | |
235 | } | |
236 | ||
b37a6b9a | 237 | |
d991ef03 | 238 | /** |
b37a6b9a | 239 | * vmw_dmabuf_upin - Unpin the buffer given buffer, does not move the buffer. |
d991ef03 | 240 | * |
b37a6b9a TH |
241 | * May only be called by the current master since it assumes that the |
242 | * master lock is the current master's lock. | |
243 | * This function takes the master's lock in write mode. | |
d991ef03 JB |
244 | * |
245 | * @dev_priv: Driver private. | |
246 | * @buf: DMA buffer to unpin. | |
247 | * @interruptible: Use interruptible wait. | |
248 | * | |
249 | * Returns | |
250 | * -ERESTARTSYS if interrupted by a signal. | |
251 | */ | |
252 | int vmw_dmabuf_unpin(struct vmw_private *dev_priv, | |
253 | struct vmw_dma_buffer *buf, | |
254 | bool interruptible) | |
255 | { | |
256 | /* | |
257 | * We could in theory early out if the buffer is | |
258 | * unpinned but we need to lock and reserve the buffer | |
259 | * anyways so we don't gain much by that. | |
260 | */ | |
261 | return vmw_dmabuf_to_placement(dev_priv, buf, | |
262 | &vmw_evictable_placement, | |
263 | interruptible); | |
264 | } | |
265 | ||
b37a6b9a | 266 | |
d991ef03 | 267 | /** |
b37a6b9a TH |
268 | * vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement |
269 | * of a buffer. | |
d991ef03 | 270 | * |
b37a6b9a TH |
271 | * @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved. |
272 | * @ptr: SVGAGuestPtr returning the result. | |
d991ef03 | 273 | */ |
b37a6b9a TH |
274 | void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo, |
275 | SVGAGuestPtr *ptr) | |
d991ef03 | 276 | { |
b37a6b9a | 277 | if (bo->mem.mem_type == TTM_PL_VRAM) { |
d991ef03 | 278 | ptr->gmrId = SVGA_GMR_FRAMEBUFFER; |
b37a6b9a | 279 | ptr->offset = bo->offset; |
d991ef03 | 280 | } else { |
b37a6b9a | 281 | ptr->gmrId = bo->mem.start; |
d991ef03 JB |
282 | ptr->offset = 0; |
283 | } | |
284 | } | |
e2fa3a76 TH |
285 | |
286 | ||
287 | /** | |
288 | * vmw_bo_pin - Pin or unpin a buffer object without moving it. | |
289 | * | |
4b9e45e6 | 290 | * @bo: The buffer object. Must be reserved. |
e2fa3a76 TH |
291 | * @pin: Whether to pin or unpin. |
292 | * | |
293 | */ | |
294 | void vmw_bo_pin(struct ttm_buffer_object *bo, bool pin) | |
295 | { | |
296 | uint32_t pl_flags; | |
297 | struct ttm_placement placement; | |
298 | uint32_t old_mem_type = bo->mem.mem_type; | |
299 | int ret; | |
300 | ||
8bd4ce56 | 301 | lockdep_assert_held(&bo->resv->lock.base); |
e2fa3a76 | 302 | |
6da768aa | 303 | pl_flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | VMW_PL_FLAG_MOB |
4b9e45e6 | 304 | | TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED; |
e2fa3a76 TH |
305 | if (pin) |
306 | pl_flags |= TTM_PL_FLAG_NO_EVICT; | |
307 | ||
308 | memset(&placement, 0, sizeof(placement)); | |
309 | placement.num_placement = 1; | |
310 | placement.placement = &pl_flags; | |
311 | ||
97a875cb | 312 | ret = ttm_bo_validate(bo, &placement, false, true); |
e2fa3a76 TH |
313 | |
314 | BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type); | |
315 | } |