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28#include <drm/drmP.h>
29#include "mgag200_drv.h"
30#include <ttm/ttm_page_alloc.h>
31
32static inline struct mga_device *
33mgag200_bdev(struct ttm_bo_device *bd)
34{
35 return container_of(bd, struct mga_device, ttm.bdev);
36}
37
38static int
39mgag200_ttm_mem_global_init(struct drm_global_reference *ref)
40{
41 return ttm_mem_global_init(ref->object);
42}
43
44static void
45mgag200_ttm_mem_global_release(struct drm_global_reference *ref)
46{
47 ttm_mem_global_release(ref->object);
48}
49
50static 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
83void
84mgag200_ttm_global_release(struct mga_device *ast)
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
95static 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
101 drm_gem_object_release(&bo->gem);
102 kfree(bo);
103}
104
105bool mgag200_ttm_bo_is_mgag200_bo(struct ttm_buffer_object *bo)
106{
107 if (bo->destroy == &mgag200_bo_ttm_destroy)
108 return true;
109 return false;
110}
111
112static int
113mgag200_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:
118 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
119 man->available_caching = TTM_PL_MASK_CACHING;
120 man->default_caching = TTM_PL_FLAG_CACHED;
121 break;
122 case TTM_PL_VRAM:
123 man->func = &ttm_bo_manager_func;
124 man->flags = TTM_MEMTYPE_FLAG_FIXED |
125 TTM_MEMTYPE_FLAG_MAPPABLE;
126 man->available_caching = TTM_PL_FLAG_UNCACHED |
127 TTM_PL_FLAG_WC;
128 man->default_caching = TTM_PL_FLAG_WC;
129 break;
130 default:
131 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
132 return -EINVAL;
133 }
134 return 0;
135}
136
137static void
138mgag200_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
139{
140 struct mgag200_bo *mgabo = mgag200_bo(bo);
141
142 if (!mgag200_ttm_bo_is_mgag200_bo(bo))
143 return;
144
145 mgag200_ttm_placement(mgabo, TTM_PL_FLAG_SYSTEM);
146 *pl = mgabo->placement;
147}
148
149static int mgag200_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
150{
151 return 0;
152}
153
154static 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
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
183static void mgag200_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
184{
185}
186
187static int mgag200_bo_move(struct ttm_buffer_object *bo,
188 bool evict, bool interruptible,
189 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_gpu, new_mem);
194 return r;
195}
196
197
198static void mgag200_ttm_backend_destroy(struct ttm_tt *tt)
199{
200 ttm_tt_fini(tt);
201 kfree(tt);
202}
203
204static struct ttm_backend_func mgag200_tt_backend_func = {
205 .destroy = &mgag200_ttm_backend_destroy,
206};
207
208
209struct ttm_tt *mgag200_ttm_tt_create(struct ttm_bo_device *bdev,
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
226static int mgag200_ttm_tt_populate(struct ttm_tt *ttm)
227{
228 return ttm_pool_populate(ttm);
229}
230
231static void mgag200_ttm_tt_unpopulate(struct ttm_tt *ttm)
232{
233 ttm_pool_unpopulate(ttm);
234}
235
236struct ttm_bo_driver mgag200_bo_driver = {
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
248int 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 = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
274 pci_resource_len(dev->pdev, 0));
275
276 return 0;
277}
278
279void mgag200_mm_fini(struct mga_device *mdev)
280{
281 ttm_bo_device_release(&mdev->ttm.bdev);
282
283 mgag200_ttm_global_release(mdev);
284
285 arch_phys_wc_del(mdev->fb_mtrr);
286 mdev->fb_mtrr = 0;
287}
288
289void mgag200_ttm_placement(struct mgag200_bo *bo, int domain)
290{
291 u32 c = 0;
292 bo->placement.fpfn = 0;
293 bo->placement.lpfn = 0;
294 bo->placement.placement = bo->placements;
295 bo->placement.busy_placement = bo->placements;
296 if (domain & TTM_PL_FLAG_VRAM)
297 bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
298 if (domain & TTM_PL_FLAG_SYSTEM)
299 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
300 if (!c)
301 bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
302 bo->placement.num_placement = c;
303 bo->placement.num_busy_placement = c;
304}
305
306int mgag200_bo_create(struct drm_device *dev, int size, int align,
307 uint32_t flags, struct mgag200_bo **pmgabo)
308{
309 struct mga_device *mdev = dev->dev_private;
310 struct mgag200_bo *mgabo;
311 size_t acc_size;
312 int ret;
313
314 mgabo = kzalloc(sizeof(struct mgag200_bo), GFP_KERNEL);
315 if (!mgabo)
316 return -ENOMEM;
317
318 ret = drm_gem_object_init(dev, &mgabo->gem, size);
319 if (ret) {
320 kfree(mgabo);
321 return ret;
322 }
323
324 mgabo->gem.driver_private = NULL;
325 mgabo->bo.bdev = &mdev->ttm.bdev;
326 mgabo->bo.bdev->dev_mapping = dev->dev_mapping;
327
328 mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
329
330 acc_size = ttm_bo_dma_acc_size(&mdev->ttm.bdev, size,
331 sizeof(struct mgag200_bo));
332
333 ret = ttm_bo_init(&mdev->ttm.bdev, &mgabo->bo, size,
334 ttm_bo_type_device, &mgabo->placement,
335 align >> PAGE_SHIFT, false, NULL, acc_size,
336 NULL, mgag200_bo_ttm_destroy);
337 if (ret)
338 return ret;
339
340 *pmgabo = mgabo;
341 return 0;
342}
343
344static inline u64 mgag200_bo_gpu_offset(struct mgag200_bo *bo)
345{
346 return bo->bo.offset;
347}
348
349int mgag200_bo_pin(struct mgag200_bo *bo, u32 pl_flag, u64 *gpu_addr)
350{
351 int i, ret;
352
353 if (bo->pin_count) {
354 bo->pin_count++;
355 if (gpu_addr)
356 *gpu_addr = mgag200_bo_gpu_offset(bo);
357 return 0;
358 }
359
360 mgag200_ttm_placement(bo, pl_flag);
361 for (i = 0; i < bo->placement.num_placement; i++)
362 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
363 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
364 if (ret)
365 return ret;
366
367 bo->pin_count = 1;
368 if (gpu_addr)
369 *gpu_addr = mgag200_bo_gpu_offset(bo);
370 return 0;
371}
372
373int mgag200_bo_unpin(struct mgag200_bo *bo)
374{
375 int i, ret;
376 if (!bo->pin_count) {
377 DRM_ERROR("unpin bad %p\n", bo);
378 return 0;
379 }
380 bo->pin_count--;
381 if (bo->pin_count)
382 return 0;
383
384 for (i = 0; i < bo->placement.num_placement ; i++)
385 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
386 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
387 if (ret)
388 return ret;
389
390 return 0;
391}
392
393int mgag200_bo_push_sysram(struct mgag200_bo *bo)
394{
395 int i, ret;
396 if (!bo->pin_count) {
397 DRM_ERROR("unpin bad %p\n", bo);
398 return 0;
399 }
400 bo->pin_count--;
401 if (bo->pin_count)
402 return 0;
403
404 if (bo->kmap.virtual)
405 ttm_bo_kunmap(&bo->kmap);
406
407 mgag200_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
408 for (i = 0; i < bo->placement.num_placement ; i++)
409 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
410
411 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
412 if (ret) {
413 DRM_ERROR("pushing to VRAM failed\n");
414 return ret;
415 }
416 return 0;
417}
418
419int mgag200_mmap(struct file *filp, struct vm_area_struct *vma)
420{
421 struct drm_file *file_priv;
422 struct mga_device *mdev;
423
424 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
425 return drm_mmap(filp, vma);
426
427 file_priv = filp->private_data;
428 mdev = file_priv->minor->dev->dev_private;
429 return ttm_bo_mmap(filp, vma, &mdev->ttm.bdev);
430}
431
