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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
83static void
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
105static bool 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 struct mgag200_bo *mgabo = mgag200_bo(bo);
152
153 return drm_vma_node_verify_access(&mgabo->gem.vma_node, filp);
154}
155
156static int mgag200_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
157 struct ttm_mem_reg *mem)
158{
159 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
160 struct mga_device *mdev = mgag200_bdev(bdev);
161
162 mem->bus.addr = NULL;
163 mem->bus.offset = 0;
164 mem->bus.size = mem->num_pages << PAGE_SHIFT;
165 mem->bus.base = 0;
166 mem->bus.is_iomem = false;
167 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
168 return -EINVAL;
169 switch (mem->mem_type) {
170 case TTM_PL_SYSTEM:
171
172 return 0;
173 case TTM_PL_VRAM:
174 mem->bus.offset = mem->start << PAGE_SHIFT;
175 mem->bus.base = pci_resource_start(mdev->dev->pdev, 0);
176 mem->bus.is_iomem = true;
177 break;
178 default:
179 return -EINVAL;
180 break;
181 }
182 return 0;
183}
184
185static void mgag200_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
186{
187}
188
189static void mgag200_ttm_backend_destroy(struct ttm_tt *tt)
190{
191 ttm_tt_fini(tt);
192 kfree(tt);
193}
194
195static struct ttm_backend_func mgag200_tt_backend_func = {
196 .destroy = &mgag200_ttm_backend_destroy,
197};
198
199
200static struct ttm_tt *mgag200_ttm_tt_create(struct ttm_bo_device *bdev,
201 unsigned long size, uint32_t page_flags,
202 struct page *dummy_read_page)
203{
204 struct ttm_tt *tt;
205
206 tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
207 if (tt == NULL)
208 return NULL;
209 tt->func = &mgag200_tt_backend_func;
210 if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
211 kfree(tt);
212 return NULL;
213 }
214 return tt;
215}
216
217static int mgag200_ttm_tt_populate(struct ttm_tt *ttm)
218{
219 return ttm_pool_populate(ttm);
220}
221
222static void mgag200_ttm_tt_unpopulate(struct ttm_tt *ttm)
223{
224 ttm_pool_unpopulate(ttm);
225}
226
227struct ttm_bo_driver mgag200_bo_driver = {
228 .ttm_tt_create = mgag200_ttm_tt_create,
229 .ttm_tt_populate = mgag200_ttm_tt_populate,
230 .ttm_tt_unpopulate = mgag200_ttm_tt_unpopulate,
231 .init_mem_type = mgag200_bo_init_mem_type,
232 .evict_flags = mgag200_bo_evict_flags,
233 .move = NULL,
234 .verify_access = mgag200_bo_verify_access,
235 .io_mem_reserve = &mgag200_ttm_io_mem_reserve,
236 .io_mem_free = &mgag200_ttm_io_mem_free,
237 .lru_tail = &ttm_bo_default_lru_tail,
238 .swap_lru_tail = &ttm_bo_default_swap_lru_tail,
239};
240
241int mgag200_mm_init(struct mga_device *mdev)
242{
243 int ret;
244 struct drm_device *dev = mdev->dev;
245 struct ttm_bo_device *bdev = &mdev->ttm.bdev;
246
247 ret = mgag200_ttm_global_init(mdev);
248 if (ret)
249 return ret;
250
251 ret = ttm_bo_device_init(&mdev->ttm.bdev,
252 mdev->ttm.bo_global_ref.ref.object,
253 &mgag200_bo_driver,
254 dev->anon_inode->i_mapping,
255 DRM_FILE_PAGE_OFFSET,
256 true);
257 if (ret) {
258 DRM_ERROR("Error initialising bo driver; %d\n", ret);
259 return ret;
260 }
261
262 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, mdev->mc.vram_size >> PAGE_SHIFT);
263 if (ret) {
264 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
265 return ret;
266 }
267
268 mdev->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
269 pci_resource_len(dev->pdev, 0));
270
271 return 0;
272}
273
274void mgag200_mm_fini(struct mga_device *mdev)
275{
276 ttm_bo_device_release(&mdev->ttm.bdev);
277
278 mgag200_ttm_global_release(mdev);
279
280 arch_phys_wc_del(mdev->fb_mtrr);
281 mdev->fb_mtrr = 0;
282}
283
284void mgag200_ttm_placement(struct mgag200_bo *bo, int domain)
285{
286 u32 c = 0;
287 unsigned i;
288
289 bo->placement.placement = bo->placements;
290 bo->placement.busy_placement = bo->placements;
291 if (domain & TTM_PL_FLAG_VRAM)
292 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
293 if (domain & TTM_PL_FLAG_SYSTEM)
294 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
295 if (!c)
296 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
297 bo->placement.num_placement = c;
298 bo->placement.num_busy_placement = c;
299 for (i = 0; i < c; ++i) {
300 bo->placements[i].fpfn = 0;
301 bo->placements[i].lpfn = 0;
302 }
303}
304
305int mgag200_bo_create(struct drm_device *dev, int size, int align,
306 uint32_t flags, struct mgag200_bo **pmgabo)
307{
308 struct mga_device *mdev = dev->dev_private;
309 struct mgag200_bo *mgabo;
310 size_t acc_size;
311 int ret;
312
313 mgabo = kzalloc(sizeof(struct mgag200_bo), GFP_KERNEL);
314 if (!mgabo)
315 return -ENOMEM;
316
317 ret = drm_gem_object_init(dev, &mgabo->gem, size);
318 if (ret) {
319 kfree(mgabo);
320 return ret;
321 }
322
323 mgabo->bo.bdev = &mdev->ttm.bdev;
324
325 mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
326
327 acc_size = ttm_bo_dma_acc_size(&mdev->ttm.bdev, size,
328 sizeof(struct mgag200_bo));
329
330 ret = ttm_bo_init(&mdev->ttm.bdev, &mgabo->bo, size,
331 ttm_bo_type_device, &mgabo->placement,
332 align >> PAGE_SHIFT, false, NULL, acc_size,
333 NULL, NULL, mgag200_bo_ttm_destroy);
334 if (ret)
335 return ret;
336
337 *pmgabo = mgabo;
338 return 0;
339}
340
341static inline u64 mgag200_bo_gpu_offset(struct mgag200_bo *bo)
342{
343 return bo->bo.offset;
344}
345
346int mgag200_bo_pin(struct mgag200_bo *bo, u32 pl_flag, u64 *gpu_addr)
347{
348 int i, ret;
349
350 if (bo->pin_count) {
351 bo->pin_count++;
352 if (gpu_addr)
353 *gpu_addr = mgag200_bo_gpu_offset(bo);
354 return 0;
355 }
356
357 mgag200_ttm_placement(bo, pl_flag);
358 for (i = 0; i < bo->placement.num_placement; i++)
359 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
360 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
361 if (ret)
362 return ret;
363
364 bo->pin_count = 1;
365 if (gpu_addr)
366 *gpu_addr = mgag200_bo_gpu_offset(bo);
367 return 0;
368}
369
370int mgag200_bo_unpin(struct mgag200_bo *bo)
371{
372 int i;
373 if (!bo->pin_count) {
374 DRM_ERROR("unpin bad %p\n", bo);
375 return 0;
376 }
377 bo->pin_count--;
378 if (bo->pin_count)
379 return 0;
380
381 for (i = 0; i < bo->placement.num_placement ; i++)
382 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
383 return ttm_bo_validate(&bo->bo, &bo->placement, false, false);
384}
385
386int mgag200_bo_push_sysram(struct mgag200_bo *bo)
387{
388 int i, ret;
389 if (!bo->pin_count) {
390 DRM_ERROR("unpin bad %p\n", bo);
391 return 0;
392 }
393 bo->pin_count--;
394 if (bo->pin_count)
395 return 0;
396
397 if (bo->kmap.virtual)
398 ttm_bo_kunmap(&bo->kmap);
399
400 mgag200_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
401 for (i = 0; i < bo->placement.num_placement ; i++)
402 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
403
404 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
405 if (ret) {
406 DRM_ERROR("pushing to VRAM failed\n");
407 return ret;
408 }
409 return 0;
410}
411
412int mgag200_mmap(struct file *filp, struct vm_area_struct *vma)
413{
414 struct drm_file *file_priv;
415 struct mga_device *mdev;
416
417 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
418 return -EINVAL;
419
420 file_priv = filp->private_data;
421 mdev = file_priv->minor->dev->dev_private;
422 return ttm_bo_mmap(filp, vma, &mdev->ttm.bdev);
423}
424
