Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[deliverable/linux.git] / drivers / gpu / drm / vmwgfx / vmwgfx_buffer.c
1 /**************************************************************************
2 *
3 * Copyright © 2009 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
28 #include "vmwgfx_drv.h"
29 #include "ttm/ttm_bo_driver.h"
30 #include "ttm/ttm_placement.h"
31
32 static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
33 TTM_PL_FLAG_CACHED;
34
35 static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
36 TTM_PL_FLAG_CACHED |
37 TTM_PL_FLAG_NO_EVICT;
38
39 static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
40 TTM_PL_FLAG_CACHED;
41
42 static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
43 TTM_PL_FLAG_CACHED;
44
45 struct ttm_placement vmw_vram_placement = {
46 .fpfn = 0,
47 .lpfn = 0,
48 .num_placement = 1,
49 .placement = &vram_placement_flags,
50 .num_busy_placement = 1,
51 .busy_placement = &vram_placement_flags
52 };
53
54 static uint32_t vram_gmr_placement_flags[] = {
55 TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
56 VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
57 };
58
59 struct ttm_placement vmw_vram_gmr_placement = {
60 .fpfn = 0,
61 .lpfn = 0,
62 .num_placement = 2,
63 .placement = vram_gmr_placement_flags,
64 .num_busy_placement = 1,
65 .busy_placement = &gmr_placement_flags
66 };
67
68 struct ttm_placement vmw_vram_sys_placement = {
69 .fpfn = 0,
70 .lpfn = 0,
71 .num_placement = 1,
72 .placement = &vram_placement_flags,
73 .num_busy_placement = 1,
74 .busy_placement = &sys_placement_flags
75 };
76
77 struct ttm_placement vmw_vram_ne_placement = {
78 .fpfn = 0,
79 .lpfn = 0,
80 .num_placement = 1,
81 .placement = &vram_ne_placement_flags,
82 .num_busy_placement = 1,
83 .busy_placement = &vram_ne_placement_flags
84 };
85
86 struct ttm_placement vmw_sys_placement = {
87 .fpfn = 0,
88 .lpfn = 0,
89 .num_placement = 1,
90 .placement = &sys_placement_flags,
91 .num_busy_placement = 1,
92 .busy_placement = &sys_placement_flags
93 };
94
95 struct vmw_ttm_backend {
96 struct ttm_backend backend;
97 struct page **pages;
98 unsigned long num_pages;
99 struct vmw_private *dev_priv;
100 int gmr_id;
101 };
102
103 static int vmw_ttm_populate(struct ttm_backend *backend,
104 unsigned long num_pages, struct page **pages,
105 struct page *dummy_read_page,
106 dma_addr_t *dma_addrs)
107 {
108 struct vmw_ttm_backend *vmw_be =
109 container_of(backend, struct vmw_ttm_backend, backend);
110
111 vmw_be->pages = pages;
112 vmw_be->num_pages = num_pages;
113
114 return 0;
115 }
116
117 static int vmw_ttm_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
118 {
119 struct vmw_ttm_backend *vmw_be =
120 container_of(backend, struct vmw_ttm_backend, backend);
121
122 vmw_be->gmr_id = bo_mem->start;
123
124 return vmw_gmr_bind(vmw_be->dev_priv, vmw_be->pages,
125 vmw_be->num_pages, vmw_be->gmr_id);
126 }
127
128 static int vmw_ttm_unbind(struct ttm_backend *backend)
129 {
130 struct vmw_ttm_backend *vmw_be =
131 container_of(backend, struct vmw_ttm_backend, backend);
132
133 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
134 return 0;
135 }
136
137 static void vmw_ttm_clear(struct ttm_backend *backend)
138 {
139 struct vmw_ttm_backend *vmw_be =
140 container_of(backend, struct vmw_ttm_backend, backend);
141
142 vmw_be->pages = NULL;
143 vmw_be->num_pages = 0;
144 }
145
146 static void vmw_ttm_destroy(struct ttm_backend *backend)
147 {
148 struct vmw_ttm_backend *vmw_be =
149 container_of(backend, struct vmw_ttm_backend, backend);
150
151 kfree(vmw_be);
152 }
153
154 static struct ttm_backend_func vmw_ttm_func = {
155 .populate = vmw_ttm_populate,
156 .clear = vmw_ttm_clear,
157 .bind = vmw_ttm_bind,
158 .unbind = vmw_ttm_unbind,
159 .destroy = vmw_ttm_destroy,
160 };
161
162 struct ttm_backend *vmw_ttm_backend_init(struct ttm_bo_device *bdev)
163 {
164 struct vmw_ttm_backend *vmw_be;
165
166 vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
167 if (!vmw_be)
168 return NULL;
169
170 vmw_be->backend.func = &vmw_ttm_func;
171 vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
172
173 return &vmw_be->backend;
174 }
175
176 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
177 {
178 return 0;
179 }
180
181 int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
182 struct ttm_mem_type_manager *man)
183 {
184 switch (type) {
185 case TTM_PL_SYSTEM:
186 /* System memory */
187
188 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
189 man->available_caching = TTM_PL_FLAG_CACHED;
190 man->default_caching = TTM_PL_FLAG_CACHED;
191 break;
192 case TTM_PL_VRAM:
193 /* "On-card" video ram */
194 man->func = &ttm_bo_manager_func;
195 man->gpu_offset = 0;
196 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
197 man->available_caching = TTM_PL_FLAG_CACHED;
198 man->default_caching = TTM_PL_FLAG_CACHED;
199 break;
200 case VMW_PL_GMR:
201 /*
202 * "Guest Memory Regions" is an aperture like feature with
203 * one slot per bo. There is an upper limit of the number of
204 * slots as well as the bo size.
205 */
206 man->func = &vmw_gmrid_manager_func;
207 man->gpu_offset = 0;
208 man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
209 man->available_caching = TTM_PL_FLAG_CACHED;
210 man->default_caching = TTM_PL_FLAG_CACHED;
211 break;
212 default:
213 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
214 return -EINVAL;
215 }
216 return 0;
217 }
218
219 void vmw_evict_flags(struct ttm_buffer_object *bo,
220 struct ttm_placement *placement)
221 {
222 *placement = vmw_sys_placement;
223 }
224
225 /**
226 * FIXME: Proper access checks on buffers.
227 */
228
229 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
230 {
231 return 0;
232 }
233
234 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
235 {
236 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
237 struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
238
239 mem->bus.addr = NULL;
240 mem->bus.is_iomem = false;
241 mem->bus.offset = 0;
242 mem->bus.size = mem->num_pages << PAGE_SHIFT;
243 mem->bus.base = 0;
244 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
245 return -EINVAL;
246 switch (mem->mem_type) {
247 case TTM_PL_SYSTEM:
248 case VMW_PL_GMR:
249 return 0;
250 case TTM_PL_VRAM:
251 mem->bus.offset = mem->start << PAGE_SHIFT;
252 mem->bus.base = dev_priv->vram_start;
253 mem->bus.is_iomem = true;
254 break;
255 default:
256 return -EINVAL;
257 }
258 return 0;
259 }
260
261 static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
262 {
263 }
264
265 static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
266 {
267 return 0;
268 }
269
270 /**
271 * FIXME: We're using the old vmware polling method to sync.
272 * Do this with fences instead.
273 */
274
275 static void *vmw_sync_obj_ref(void *sync_obj)
276 {
277 return sync_obj;
278 }
279
280 static void vmw_sync_obj_unref(void **sync_obj)
281 {
282 *sync_obj = NULL;
283 }
284
285 static int vmw_sync_obj_flush(void *sync_obj, void *sync_arg)
286 {
287 struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
288
289 mutex_lock(&dev_priv->hw_mutex);
290 vmw_write(dev_priv, SVGA_REG_SYNC, SVGA_SYNC_GENERIC);
291 mutex_unlock(&dev_priv->hw_mutex);
292 return 0;
293 }
294
295 static bool vmw_sync_obj_signaled(void *sync_obj, void *sync_arg)
296 {
297 struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
298 uint32_t sequence = (unsigned long) sync_obj;
299
300 return vmw_fence_signaled(dev_priv, sequence);
301 }
302
303 static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
304 bool lazy, bool interruptible)
305 {
306 struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
307 uint32_t sequence = (unsigned long) sync_obj;
308
309 return vmw_wait_fence(dev_priv, false, sequence, false, 3*HZ);
310 }
311
312 struct ttm_bo_driver vmw_bo_driver = {
313 .create_ttm_backend_entry = vmw_ttm_backend_init,
314 .invalidate_caches = vmw_invalidate_caches,
315 .init_mem_type = vmw_init_mem_type,
316 .evict_flags = vmw_evict_flags,
317 .move = NULL,
318 .verify_access = vmw_verify_access,
319 .sync_obj_signaled = vmw_sync_obj_signaled,
320 .sync_obj_wait = vmw_sync_obj_wait,
321 .sync_obj_flush = vmw_sync_obj_flush,
322 .sync_obj_unref = vmw_sync_obj_unref,
323 .sync_obj_ref = vmw_sync_obj_ref,
324 .move_notify = NULL,
325 .swap_notify = NULL,
326 .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
327 .io_mem_reserve = &vmw_ttm_io_mem_reserve,
328 .io_mem_free = &vmw_ttm_io_mem_free,
329 };
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