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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 <drm/ttm/ttm_bo_driver.h>
30 #include <drm/ttm/ttm_placement.h>
31 #include <drm/ttm/ttm_page_alloc.h>
32 
33 static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
34 	TTM_PL_FLAG_CACHED;
35 
36 static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
37 	TTM_PL_FLAG_CACHED |
38 	TTM_PL_FLAG_NO_EVICT;
39 
40 static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
41 	TTM_PL_FLAG_CACHED;
42 
43 static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
44 	TTM_PL_FLAG_CACHED;
45 
46 static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR |
47 	TTM_PL_FLAG_CACHED |
48 	TTM_PL_FLAG_NO_EVICT;
49 
50 struct ttm_placement vmw_vram_placement = {
51 	.fpfn = 0,
52 	.lpfn = 0,
53 	.num_placement = 1,
54 	.placement = &vram_placement_flags,
55 	.num_busy_placement = 1,
56 	.busy_placement = &vram_placement_flags
57 };
58 
59 static uint32_t vram_gmr_placement_flags[] = {
60 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
61 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
62 };
63 
64 static uint32_t gmr_vram_placement_flags[] = {
65 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED,
66 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
67 };
68 
69 struct ttm_placement vmw_vram_gmr_placement = {
70 	.fpfn = 0,
71 	.lpfn = 0,
72 	.num_placement = 2,
73 	.placement = vram_gmr_placement_flags,
74 	.num_busy_placement = 1,
75 	.busy_placement = &gmr_placement_flags
76 };
77 
78 static uint32_t vram_gmr_ne_placement_flags[] = {
79 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
80 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
81 };
82 
83 struct ttm_placement vmw_vram_gmr_ne_placement = {
84 	.fpfn = 0,
85 	.lpfn = 0,
86 	.num_placement = 2,
87 	.placement = vram_gmr_ne_placement_flags,
88 	.num_busy_placement = 1,
89 	.busy_placement = &gmr_ne_placement_flags
90 };
91 
92 struct ttm_placement vmw_vram_sys_placement = {
93 	.fpfn = 0,
94 	.lpfn = 0,
95 	.num_placement = 1,
96 	.placement = &vram_placement_flags,
97 	.num_busy_placement = 1,
98 	.busy_placement = &sys_placement_flags
99 };
100 
101 struct ttm_placement vmw_vram_ne_placement = {
102 	.fpfn = 0,
103 	.lpfn = 0,
104 	.num_placement = 1,
105 	.placement = &vram_ne_placement_flags,
106 	.num_busy_placement = 1,
107 	.busy_placement = &vram_ne_placement_flags
108 };
109 
110 struct ttm_placement vmw_sys_placement = {
111 	.fpfn = 0,
112 	.lpfn = 0,
113 	.num_placement = 1,
114 	.placement = &sys_placement_flags,
115 	.num_busy_placement = 1,
116 	.busy_placement = &sys_placement_flags
117 };
118 
119 static uint32_t evictable_placement_flags[] = {
120 	TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
121 	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
122 	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
123 };
124 
125 struct ttm_placement vmw_evictable_placement = {
126 	.fpfn = 0,
127 	.lpfn = 0,
128 	.num_placement = 3,
129 	.placement = evictable_placement_flags,
130 	.num_busy_placement = 1,
131 	.busy_placement = &sys_placement_flags
132 };
133 
134 struct ttm_placement vmw_srf_placement = {
135 	.fpfn = 0,
136 	.lpfn = 0,
137 	.num_placement = 1,
138 	.num_busy_placement = 2,
139 	.placement = &gmr_placement_flags,
140 	.busy_placement = gmr_vram_placement_flags
141 };
142 
143 struct vmw_ttm_tt {
144 	struct ttm_tt ttm;
145 	struct vmw_private *dev_priv;
146 	int gmr_id;
147 };
148 
vmw_ttm_bind(struct ttm_tt * ttm,struct ttm_mem_reg * bo_mem)149 static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
150 {
151 	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
152 
153 	vmw_be->gmr_id = bo_mem->start;
154 
155 	return vmw_gmr_bind(vmw_be->dev_priv, ttm->pages,
156 			    ttm->num_pages, vmw_be->gmr_id);
157 }
158 
vmw_ttm_unbind(struct ttm_tt * ttm)159 static int vmw_ttm_unbind(struct ttm_tt *ttm)
160 {
161 	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
162 
163 	vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
164 	return 0;
165 }
166 
vmw_ttm_destroy(struct ttm_tt * ttm)167 static void vmw_ttm_destroy(struct ttm_tt *ttm)
168 {
169 	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
170 
171 	ttm_tt_fini(ttm);
172 	kfree(vmw_be);
173 }
174 
175 static struct ttm_backend_func vmw_ttm_func = {
176 	.bind = vmw_ttm_bind,
177 	.unbind = vmw_ttm_unbind,
178 	.destroy = vmw_ttm_destroy,
179 };
180 
vmw_ttm_tt_create(struct ttm_bo_device * bdev,unsigned long size,uint32_t page_flags,struct page * dummy_read_page)181 struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
182 				 unsigned long size, uint32_t page_flags,
183 				 struct page *dummy_read_page)
184 {
185 	struct vmw_ttm_tt *vmw_be;
186 
187 	vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
188 	if (!vmw_be)
189 		return NULL;
190 
191 	vmw_be->ttm.func = &vmw_ttm_func;
192 	vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
193 
194 	if (ttm_tt_init(&vmw_be->ttm, bdev, size, page_flags, dummy_read_page)) {
195 		kfree(vmw_be);
196 		return NULL;
197 	}
198 
199 	return &vmw_be->ttm;
200 }
201 
vmw_invalidate_caches(struct ttm_bo_device * bdev,uint32_t flags)202 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
203 {
204 	return 0;
205 }
206 
vmw_init_mem_type(struct ttm_bo_device * bdev,uint32_t type,struct ttm_mem_type_manager * man)207 int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
208 		      struct ttm_mem_type_manager *man)
209 {
210 	switch (type) {
211 	case TTM_PL_SYSTEM:
212 		/* System memory */
213 
214 		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
215 		man->available_caching = TTM_PL_FLAG_CACHED;
216 		man->default_caching = TTM_PL_FLAG_CACHED;
217 		break;
218 	case TTM_PL_VRAM:
219 		/* "On-card" video ram */
220 		man->func = &ttm_bo_manager_func;
221 		man->gpu_offset = 0;
222 		man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
223 		man->available_caching = TTM_PL_FLAG_CACHED;
224 		man->default_caching = TTM_PL_FLAG_CACHED;
225 		break;
226 	case VMW_PL_GMR:
227 		/*
228 		 * "Guest Memory Regions" is an aperture like feature with
229 		 *  one slot per bo. There is an upper limit of the number of
230 		 *  slots as well as the bo size.
231 		 */
232 		man->func = &vmw_gmrid_manager_func;
233 		man->gpu_offset = 0;
234 		man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
235 		man->available_caching = TTM_PL_FLAG_CACHED;
236 		man->default_caching = TTM_PL_FLAG_CACHED;
237 		break;
238 	default:
239 		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
240 		return -EINVAL;
241 	}
242 	return 0;
243 }
244 
vmw_evict_flags(struct ttm_buffer_object * bo,struct ttm_placement * placement)245 void vmw_evict_flags(struct ttm_buffer_object *bo,
246 		     struct ttm_placement *placement)
247 {
248 	*placement = vmw_sys_placement;
249 }
250 
vmw_verify_access(struct ttm_buffer_object * bo,struct file * filp)251 static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
252 {
253 	struct ttm_object_file *tfile =
254 		vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
255 
256 	return vmw_user_dmabuf_verify_access(bo, tfile);
257 }
258 
vmw_ttm_io_mem_reserve(struct ttm_bo_device * bdev,struct ttm_mem_reg * mem)259 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
260 {
261 	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
262 	struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
263 
264 	mem->bus.addr = NULL;
265 	mem->bus.is_iomem = false;
266 	mem->bus.offset = 0;
267 	mem->bus.size = mem->num_pages << PAGE_SHIFT;
268 	mem->bus.base = 0;
269 	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
270 		return -EINVAL;
271 	switch (mem->mem_type) {
272 	case TTM_PL_SYSTEM:
273 	case VMW_PL_GMR:
274 		return 0;
275 	case TTM_PL_VRAM:
276 		mem->bus.offset = mem->start << PAGE_SHIFT;
277 		mem->bus.base = dev_priv->vram_start;
278 		mem->bus.is_iomem = true;
279 		break;
280 	default:
281 		return -EINVAL;
282 	}
283 	return 0;
284 }
285 
vmw_ttm_io_mem_free(struct ttm_bo_device * bdev,struct ttm_mem_reg * mem)286 static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
287 {
288 }
289 
vmw_ttm_fault_reserve_notify(struct ttm_buffer_object * bo)290 static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
291 {
292 	return 0;
293 }
294 
295 /**
296  * FIXME: We're using the old vmware polling method to sync.
297  * Do this with fences instead.
298  */
299 
vmw_sync_obj_ref(void * sync_obj)300 static void *vmw_sync_obj_ref(void *sync_obj)
301 {
302 
303 	return (void *)
304 		vmw_fence_obj_reference((struct vmw_fence_obj *) sync_obj);
305 }
306 
vmw_sync_obj_unref(void ** sync_obj)307 static void vmw_sync_obj_unref(void **sync_obj)
308 {
309 	vmw_fence_obj_unreference((struct vmw_fence_obj **) sync_obj);
310 }
311 
vmw_sync_obj_flush(void * sync_obj)312 static int vmw_sync_obj_flush(void *sync_obj)
313 {
314 	vmw_fence_obj_flush((struct vmw_fence_obj *) sync_obj);
315 	return 0;
316 }
317 
vmw_sync_obj_signaled(void * sync_obj)318 static bool vmw_sync_obj_signaled(void *sync_obj)
319 {
320 	return	vmw_fence_obj_signaled((struct vmw_fence_obj *) sync_obj,
321 				       DRM_VMW_FENCE_FLAG_EXEC);
322 
323 }
324 
vmw_sync_obj_wait(void * sync_obj,bool lazy,bool interruptible)325 static int vmw_sync_obj_wait(void *sync_obj, bool lazy, bool interruptible)
326 {
327 	return vmw_fence_obj_wait((struct vmw_fence_obj *) sync_obj,
328 				  DRM_VMW_FENCE_FLAG_EXEC,
329 				  lazy, interruptible,
330 				  VMW_FENCE_WAIT_TIMEOUT);
331 }
332 
333 struct ttm_bo_driver vmw_bo_driver = {
334 	.ttm_tt_create = &vmw_ttm_tt_create,
335 	.ttm_tt_populate = &ttm_pool_populate,
336 	.ttm_tt_unpopulate = &ttm_pool_unpopulate,
337 	.invalidate_caches = vmw_invalidate_caches,
338 	.init_mem_type = vmw_init_mem_type,
339 	.evict_flags = vmw_evict_flags,
340 	.move = NULL,
341 	.verify_access = vmw_verify_access,
342 	.sync_obj_signaled = vmw_sync_obj_signaled,
343 	.sync_obj_wait = vmw_sync_obj_wait,
344 	.sync_obj_flush = vmw_sync_obj_flush,
345 	.sync_obj_unref = vmw_sync_obj_unref,
346 	.sync_obj_ref = vmw_sync_obj_ref,
347 	.move_notify = NULL,
348 	.swap_notify = NULL,
349 	.fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
350 	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
351 	.io_mem_free = &vmw_ttm_io_mem_free,
352 };
353