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mgag200_ttm.c
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1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the
6  * "Software"), to deal in the Software without restriction, including
7  * without limitation the rights to use, copy, modify, merge, publish,
8  * distribute, sub license, and/or sell copies of the Software, and to
9  * permit persons to whom the Software is furnished to do so, subject to
10  * the following conditions:
11  *
12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
19  *
20  * The above copyright notice and this permission notice (including the
21  * next paragraph) shall be included in all copies or substantial portions
22  * of the Software.
23  *
24  */
25 /*
26  * Authors: Dave Airlie <[email protected]>
27  */
28 #include <drm/drmP.h>
29 #include "mgag200_drv.h"
30 #include <ttm/ttm_page_alloc.h>
31 
32 static inline struct mga_device *
33 mgag200_bdev(struct ttm_bo_device *bd)
34 {
35  return container_of(bd, struct mga_device, ttm.bdev);
36 }
37 
38 static int
39 mgag200_ttm_mem_global_init(struct drm_global_reference *ref)
40 {
41  return ttm_mem_global_init(ref->object);
42 }
43 
44 static void
45 mgag200_ttm_mem_global_release(struct drm_global_reference *ref)
46 {
48 }
49 
50 static int mgag200_ttm_global_init(struct mga_device *ast)
51 {
52  struct drm_global_reference *global_ref;
53  int r;
54 
55  global_ref = &ast->ttm.mem_global_ref;
56  global_ref->global_type = DRM_GLOBAL_TTM_MEM;
57  global_ref->size = sizeof(struct ttm_mem_global);
58  global_ref->init = &mgag200_ttm_mem_global_init;
59  global_ref->release = &mgag200_ttm_mem_global_release;
60  r = drm_global_item_ref(global_ref);
61  if (r != 0) {
62  DRM_ERROR("Failed setting up TTM memory accounting "
63  "subsystem.\n");
64  return r;
65  }
66 
67  ast->ttm.bo_global_ref.mem_glob =
68  ast->ttm.mem_global_ref.object;
69  global_ref = &ast->ttm.bo_global_ref.ref;
70  global_ref->global_type = DRM_GLOBAL_TTM_BO;
71  global_ref->size = sizeof(struct ttm_bo_global);
72  global_ref->init = &ttm_bo_global_init;
73  global_ref->release = &ttm_bo_global_release;
74  r = drm_global_item_ref(global_ref);
75  if (r != 0) {
76  DRM_ERROR("Failed setting up TTM BO subsystem.\n");
77  drm_global_item_unref(&ast->ttm.mem_global_ref);
78  return r;
79  }
80  return 0;
81 }
82 
83 void
85 {
86  if (ast->ttm.mem_global_ref.release == NULL)
87  return;
88 
89  drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
90  drm_global_item_unref(&ast->ttm.mem_global_ref);
91  ast->ttm.mem_global_ref.release = NULL;
92 }
93 
94 
95 static void mgag200_bo_ttm_destroy(struct ttm_buffer_object *tbo)
96 {
97  struct mgag200_bo *bo;
98 
99  bo = container_of(tbo, struct mgag200_bo, bo);
100 
102  kfree(bo);
103 }
104 
106 {
107  if (bo->destroy == &mgag200_bo_ttm_destroy)
108  return true;
109  return false;
110 }
111 
112 static int
113 mgag200_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
114  struct ttm_mem_type_manager *man)
115 {
116  switch (type) {
117  case TTM_PL_SYSTEM:
121  break;
122  case TTM_PL_VRAM:
123  man->func = &ttm_bo_manager_func;
129  break;
130  default:
131  DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
132  return -EINVAL;
133  }
134  return 0;
135 }
136 
137 static void
138 mgag200_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
139 {
140  struct mgag200_bo *mgabo = mgag200_bo(bo);
141 
143  return;
144 
146  *pl = mgabo->placement;
147 }
148 
149 static int mgag200_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
150 {
151  return 0;
152 }
153 
154 static int mgag200_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
155  struct ttm_mem_reg *mem)
156 {
157  struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
158  struct mga_device *mdev = mgag200_bdev(bdev);
159 
160  mem->bus.addr = NULL;
161  mem->bus.offset = 0;
162  mem->bus.size = mem->num_pages << PAGE_SHIFT;
163  mem->bus.base = 0;
164  mem->bus.is_iomem = false;
165  if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
166  return -EINVAL;
167  switch (mem->mem_type) {
168  case TTM_PL_SYSTEM:
169  /* system memory */
170  return 0;
171  case TTM_PL_VRAM:
172  mem->bus.offset = mem->start << PAGE_SHIFT;
173  mem->bus.base = pci_resource_start(mdev->dev->pdev, 0);
174  mem->bus.is_iomem = true;
175  break;
176  default:
177  return -EINVAL;
178  break;
179  }
180  return 0;
181 }
182 
183 static void mgag200_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
184 {
185 }
186 
187 static int mgag200_bo_move(struct ttm_buffer_object *bo,
188  bool evict, bool interruptible,
189  bool no_wait_reserve, bool no_wait_gpu,
190  struct ttm_mem_reg *new_mem)
191 {
192  int r;
193  r = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, new_mem);
194  return r;
195 }
196 
197 
198 static void mgag200_ttm_backend_destroy(struct ttm_tt *tt)
199 {
200  ttm_tt_fini(tt);
201  kfree(tt);
202 }
203 
204 static struct ttm_backend_func mgag200_tt_backend_func = {
205  .destroy = &mgag200_ttm_backend_destroy,
206 };
207 
208 
210  unsigned long size, uint32_t page_flags,
211  struct page *dummy_read_page)
212 {
213  struct ttm_tt *tt;
214 
215  tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
216  if (tt == NULL)
217  return NULL;
218  tt->func = &mgag200_tt_backend_func;
219  if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
220  kfree(tt);
221  return NULL;
222  }
223  return tt;
224 }
225 
226 static int mgag200_ttm_tt_populate(struct ttm_tt *ttm)
227 {
228  return ttm_pool_populate(ttm);
229 }
230 
231 static void mgag200_ttm_tt_unpopulate(struct ttm_tt *ttm)
232 {
233  ttm_pool_unpopulate(ttm);
234 }
235 
237  .ttm_tt_create = mgag200_ttm_tt_create,
238  .ttm_tt_populate = mgag200_ttm_tt_populate,
239  .ttm_tt_unpopulate = mgag200_ttm_tt_unpopulate,
240  .init_mem_type = mgag200_bo_init_mem_type,
241  .evict_flags = mgag200_bo_evict_flags,
242  .move = mgag200_bo_move,
243  .verify_access = mgag200_bo_verify_access,
244  .io_mem_reserve = &mgag200_ttm_io_mem_reserve,
245  .io_mem_free = &mgag200_ttm_io_mem_free,
246 };
247 
248 int mgag200_mm_init(struct mga_device *mdev)
249 {
250  int ret;
251  struct drm_device *dev = mdev->dev;
252  struct ttm_bo_device *bdev = &mdev->ttm.bdev;
253 
254  ret = mgag200_ttm_global_init(mdev);
255  if (ret)
256  return ret;
257 
258  ret = ttm_bo_device_init(&mdev->ttm.bdev,
259  mdev->ttm.bo_global_ref.ref.object,
260  &mgag200_bo_driver, DRM_FILE_PAGE_OFFSET,
261  true);
262  if (ret) {
263  DRM_ERROR("Error initialising bo driver; %d\n", ret);
264  return ret;
265  }
266 
267  ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, mdev->mc.vram_size >> PAGE_SHIFT);
268  if (ret) {
269  DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
270  return ret;
271  }
272 
273  mdev->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
274  pci_resource_len(dev->pdev, 0),
275  DRM_MTRR_WC);
276 
277  return 0;
278 }
279 
280 void mgag200_mm_fini(struct mga_device *mdev)
281 {
282  struct drm_device *dev = mdev->dev;
283  ttm_bo_device_release(&mdev->ttm.bdev);
284 
286 
287  if (mdev->fb_mtrr >= 0) {
288  drm_mtrr_del(mdev->fb_mtrr,
289  pci_resource_start(dev->pdev, 0),
290  pci_resource_len(dev->pdev, 0), DRM_MTRR_WC);
291  mdev->fb_mtrr = -1;
292  }
293 }
294 
295 void mgag200_ttm_placement(struct mgag200_bo *bo, int domain)
296 {
297  u32 c = 0;
298  bo->placement.fpfn = 0;
299  bo->placement.lpfn = 0;
300  bo->placement.placement = bo->placements;
301  bo->placement.busy_placement = bo->placements;
302  if (domain & TTM_PL_FLAG_VRAM)
304  if (domain & TTM_PL_FLAG_SYSTEM)
306  if (!c)
308  bo->placement.num_placement = c;
309  bo->placement.num_busy_placement = c;
310 }
311 
312 int mgag200_bo_reserve(struct mgag200_bo *bo, bool no_wait)
313 {
314  int ret;
315 
316  ret = ttm_bo_reserve(&bo->bo, true, no_wait, false, 0);
317  if (ret) {
318  if (ret != -ERESTARTSYS)
319  DRM_ERROR("reserve failed %p\n", bo);
320  return ret;
321  }
322  return 0;
323 }
324 
326 {
327  ttm_bo_unreserve(&bo->bo);
328 }
329 
330 int mgag200_bo_create(struct drm_device *dev, int size, int align,
331  uint32_t flags, struct mgag200_bo **pmgabo)
332 {
333  struct mga_device *mdev = dev->dev_private;
334  struct mgag200_bo *mgabo;
335  size_t acc_size;
336  int ret;
337 
338  mgabo = kzalloc(sizeof(struct mgag200_bo), GFP_KERNEL);
339  if (!mgabo)
340  return -ENOMEM;
341 
342  ret = drm_gem_object_init(dev, &mgabo->gem, size);
343  if (ret) {
344  kfree(mgabo);
345  return ret;
346  }
347 
348  mgabo->gem.driver_private = NULL;
349  mgabo->bo.bdev = &mdev->ttm.bdev;
350 
352 
353  acc_size = ttm_bo_dma_acc_size(&mdev->ttm.bdev, size,
354  sizeof(struct mgag200_bo));
355 
356  ret = ttm_bo_init(&mdev->ttm.bdev, &mgabo->bo, size,
357  ttm_bo_type_device, &mgabo->placement,
358  align >> PAGE_SHIFT, 0, false, NULL, acc_size,
359  NULL, mgag200_bo_ttm_destroy);
360  if (ret)
361  return ret;
362 
363  *pmgabo = mgabo;
364  return 0;
365 }
366 
367 static inline u64 mgag200_bo_gpu_offset(struct mgag200_bo *bo)
368 {
369  return bo->bo.offset;
370 }
371 
372 int mgag200_bo_pin(struct mgag200_bo *bo, u32 pl_flag, u64 *gpu_addr)
373 {
374  int i, ret;
375 
376  if (bo->pin_count) {
377  bo->pin_count++;
378  if (gpu_addr)
379  *gpu_addr = mgag200_bo_gpu_offset(bo);
380  }
381 
382  mgag200_ttm_placement(bo, pl_flag);
383  for (i = 0; i < bo->placement.num_placement; i++)
385  ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
386  if (ret)
387  return ret;
388 
389  bo->pin_count = 1;
390  if (gpu_addr)
391  *gpu_addr = mgag200_bo_gpu_offset(bo);
392  return 0;
393 }
394 
396 {
397  int i, ret;
398  if (!bo->pin_count) {
399  DRM_ERROR("unpin bad %p\n", bo);
400  return 0;
401  }
402  bo->pin_count--;
403  if (bo->pin_count)
404  return 0;
405 
406  for (i = 0; i < bo->placement.num_placement ; i++)
407  bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
408  ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
409  if (ret)
410  return ret;
411 
412  return 0;
413 }
414 
416 {
417  int i, ret;
418  if (!bo->pin_count) {
419  DRM_ERROR("unpin bad %p\n", bo);
420  return 0;
421  }
422  bo->pin_count--;
423  if (bo->pin_count)
424  return 0;
425 
426  if (bo->kmap.virtual)
427  ttm_bo_kunmap(&bo->kmap);
428 
430  for (i = 0; i < bo->placement.num_placement ; i++)
432 
433  ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
434  if (ret) {
435  DRM_ERROR("pushing to VRAM failed\n");
436  return ret;
437  }
438  return 0;
439 }
440 
441 int mgag200_mmap(struct file *filp, struct vm_area_struct *vma)
442 {
443  struct drm_file *file_priv;
444  struct mga_device *mdev;
445 
447  return drm_mmap(filp, vma);
448 
449  file_priv = filp->private_data;
450  mdev = file_priv->minor->dev->dev_private;
451  return ttm_bo_mmap(filp, vma, &mdev->ttm.bdev);
452 }