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28#include <drm/drmP.h>
29#include <drm/ttm/ttm_page_alloc.h>
30
31#include "ast_drv.h"
32
33static inline struct ast_private *
34ast_bdev(struct ttm_bo_device *bd)
35{
36 return container_of(bd, struct ast_private, ttm.bdev);
37}
38
39static int
40ast_ttm_mem_global_init(struct drm_global_reference *ref)
41{
42 return ttm_mem_global_init(ref->object);
43}
44
45static void
46ast_ttm_mem_global_release(struct drm_global_reference *ref)
47{
48 ttm_mem_global_release(ref->object);
49}
50
51static int ast_ttm_global_init(struct ast_private *ast)
52{
53 struct drm_global_reference *global_ref;
54 int r;
55
56 global_ref = &ast->ttm.mem_global_ref;
57 global_ref->global_type = DRM_GLOBAL_TTM_MEM;
58 global_ref->size = sizeof(struct ttm_mem_global);
59 global_ref->init = &ast_ttm_mem_global_init;
60 global_ref->release = &ast_ttm_mem_global_release;
61 r = drm_global_item_ref(global_ref);
62 if (r != 0) {
63 DRM_ERROR("Failed setting up TTM memory accounting "
64 "subsystem.\n");
65 return r;
66 }
67
68 ast->ttm.bo_global_ref.mem_glob =
69 ast->ttm.mem_global_ref.object;
70 global_ref = &ast->ttm.bo_global_ref.ref;
71 global_ref->global_type = DRM_GLOBAL_TTM_BO;
72 global_ref->size = sizeof(struct ttm_bo_global);
73 global_ref->init = &ttm_bo_global_init;
74 global_ref->release = &ttm_bo_global_release;
75 r = drm_global_item_ref(global_ref);
76 if (r != 0) {
77 DRM_ERROR("Failed setting up TTM BO subsystem.\n");
78 drm_global_item_unref(&ast->ttm.mem_global_ref);
79 return r;
80 }
81 return 0;
82}
83
84static void
85ast_ttm_global_release(struct ast_private *ast)
86{
87 if (ast->ttm.mem_global_ref.release == NULL)
88 return;
89
90 drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
91 drm_global_item_unref(&ast->ttm.mem_global_ref);
92 ast->ttm.mem_global_ref.release = NULL;
93}
94
95
96static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
97{
98 struct ast_bo *bo;
99
100 bo = container_of(tbo, struct ast_bo, bo);
101
102 drm_gem_object_release(&bo->gem);
103 kfree(bo);
104}
105
106static bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
107{
108 if (bo->destroy == &ast_bo_ttm_destroy)
109 return true;
110 return false;
111}
112
113static int
114ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
115 struct ttm_mem_type_manager *man)
116{
117 switch (type) {
118 case TTM_PL_SYSTEM:
119 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
120 man->available_caching = TTM_PL_MASK_CACHING;
121 man->default_caching = TTM_PL_FLAG_CACHED;
122 break;
123 case TTM_PL_VRAM:
124 man->func = &ttm_bo_manager_func;
125 man->flags = TTM_MEMTYPE_FLAG_FIXED |
126 TTM_MEMTYPE_FLAG_MAPPABLE;
127 man->available_caching = TTM_PL_FLAG_UNCACHED |
128 TTM_PL_FLAG_WC;
129 man->default_caching = TTM_PL_FLAG_WC;
130 break;
131 default:
132 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
133 return -EINVAL;
134 }
135 return 0;
136}
137
138static void
139ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
140{
141 struct ast_bo *astbo = ast_bo(bo);
142
143 if (!ast_ttm_bo_is_ast_bo(bo))
144 return;
145
146 ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
147 *pl = astbo->placement;
148}
149
150static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
151{
152 struct ast_bo *astbo = ast_bo(bo);
153
154 return drm_vma_node_verify_access(&astbo->gem.vma_node,
155 filp->private_data);
156}
157
158static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
159 struct ttm_mem_reg *mem)
160{
161 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
162 struct ast_private *ast = ast_bdev(bdev);
163
164 mem->bus.addr = NULL;
165 mem->bus.offset = 0;
166 mem->bus.size = mem->num_pages << PAGE_SHIFT;
167 mem->bus.base = 0;
168 mem->bus.is_iomem = false;
169 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
170 return -EINVAL;
171 switch (mem->mem_type) {
172 case TTM_PL_SYSTEM:
173
174 return 0;
175 case TTM_PL_VRAM:
176 mem->bus.offset = mem->start << PAGE_SHIFT;
177 mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
178 mem->bus.is_iomem = true;
179 break;
180 default:
181 return -EINVAL;
182 break;
183 }
184 return 0;
185}
186
187static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
188{
189}
190
191static void ast_ttm_backend_destroy(struct ttm_tt *tt)
192{
193 ttm_tt_fini(tt);
194 kfree(tt);
195}
196
197static struct ttm_backend_func ast_tt_backend_func = {
198 .destroy = &ast_ttm_backend_destroy,
199};
200
201
202static struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev,
203 unsigned long size, uint32_t page_flags,
204 struct page *dummy_read_page)
205{
206 struct ttm_tt *tt;
207
208 tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
209 if (tt == NULL)
210 return NULL;
211 tt->func = &ast_tt_backend_func;
212 if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
213 kfree(tt);
214 return NULL;
215 }
216 return tt;
217}
218
219static int ast_ttm_tt_populate(struct ttm_tt *ttm)
220{
221 return ttm_pool_populate(ttm);
222}
223
224static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
225{
226 ttm_pool_unpopulate(ttm);
227}
228
229struct ttm_bo_driver ast_bo_driver = {
230 .ttm_tt_create = ast_ttm_tt_create,
231 .ttm_tt_populate = ast_ttm_tt_populate,
232 .ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
233 .init_mem_type = ast_bo_init_mem_type,
234 .eviction_valuable = ttm_bo_eviction_valuable,
235 .evict_flags = ast_bo_evict_flags,
236 .move = NULL,
237 .verify_access = ast_bo_verify_access,
238 .io_mem_reserve = &ast_ttm_io_mem_reserve,
239 .io_mem_free = &ast_ttm_io_mem_free,
240 .io_mem_pfn = ttm_bo_default_io_mem_pfn,
241};
242
243int ast_mm_init(struct ast_private *ast)
244{
245 int ret;
246 struct drm_device *dev = ast->dev;
247 struct ttm_bo_device *bdev = &ast->ttm.bdev;
248
249 ret = ast_ttm_global_init(ast);
250 if (ret)
251 return ret;
252
253 ret = ttm_bo_device_init(&ast->ttm.bdev,
254 ast->ttm.bo_global_ref.ref.object,
255 &ast_bo_driver,
256 dev->anon_inode->i_mapping,
257 DRM_FILE_PAGE_OFFSET,
258 true);
259 if (ret) {
260 DRM_ERROR("Error initialising bo driver; %d\n", ret);
261 return ret;
262 }
263
264 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
265 ast->vram_size >> PAGE_SHIFT);
266 if (ret) {
267 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
268 return ret;
269 }
270
271 arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
272 pci_resource_len(dev->pdev, 0));
273 ast->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 ast_mm_fini(struct ast_private *ast)
280{
281 struct drm_device *dev = ast->dev;
282
283 ttm_bo_device_release(&ast->ttm.bdev);
284
285 ast_ttm_global_release(ast);
286
287 arch_phys_wc_del(ast->fb_mtrr);
288 arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
289 pci_resource_len(dev->pdev, 0));
290}
291
292void ast_ttm_placement(struct ast_bo *bo, int domain)
293{
294 u32 c = 0;
295 unsigned i;
296
297 bo->placement.placement = bo->placements;
298 bo->placement.busy_placement = bo->placements;
299 if (domain & TTM_PL_FLAG_VRAM)
300 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
301 if (domain & TTM_PL_FLAG_SYSTEM)
302 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
303 if (!c)
304 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
305 bo->placement.num_placement = c;
306 bo->placement.num_busy_placement = c;
307 for (i = 0; i < c; ++i) {
308 bo->placements[i].fpfn = 0;
309 bo->placements[i].lpfn = 0;
310 }
311}
312
313int ast_bo_create(struct drm_device *dev, int size, int align,
314 uint32_t flags, struct ast_bo **pastbo)
315{
316 struct ast_private *ast = dev->dev_private;
317 struct ast_bo *astbo;
318 size_t acc_size;
319 int ret;
320
321 astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
322 if (!astbo)
323 return -ENOMEM;
324
325 ret = drm_gem_object_init(dev, &astbo->gem, size);
326 if (ret)
327 goto error;
328
329 astbo->bo.bdev = &ast->ttm.bdev;
330
331 ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
332
333 acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
334 sizeof(struct ast_bo));
335
336 ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
337 ttm_bo_type_device, &astbo->placement,
338 align >> PAGE_SHIFT, false, NULL, acc_size,
339 NULL, NULL, ast_bo_ttm_destroy);
340 if (ret)
341 goto error;
342
343 *pastbo = astbo;
344 return 0;
345error:
346 kfree(astbo);
347 return ret;
348}
349
350static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
351{
352 return bo->bo.offset;
353}
354
355int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
356{
357 int i, ret;
358
359 if (bo->pin_count) {
360 bo->pin_count++;
361 if (gpu_addr)
362 *gpu_addr = ast_bo_gpu_offset(bo);
363 }
364
365 ast_ttm_placement(bo, pl_flag);
366 for (i = 0; i < bo->placement.num_placement; i++)
367 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
368 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
369 if (ret)
370 return ret;
371
372 bo->pin_count = 1;
373 if (gpu_addr)
374 *gpu_addr = ast_bo_gpu_offset(bo);
375 return 0;
376}
377
378int ast_bo_unpin(struct ast_bo *bo)
379{
380 int i;
381 if (!bo->pin_count) {
382 DRM_ERROR("unpin bad %p\n", bo);
383 return 0;
384 }
385 bo->pin_count--;
386 if (bo->pin_count)
387 return 0;
388
389 for (i = 0; i < bo->placement.num_placement ; i++)
390 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
391 return ttm_bo_validate(&bo->bo, &bo->placement, false, false);
392}
393
394int ast_bo_push_sysram(struct ast_bo *bo)
395{
396 int i, ret;
397 if (!bo->pin_count) {
398 DRM_ERROR("unpin bad %p\n", bo);
399 return 0;
400 }
401 bo->pin_count--;
402 if (bo->pin_count)
403 return 0;
404
405 if (bo->kmap.virtual)
406 ttm_bo_kunmap(&bo->kmap);
407
408 ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
409 for (i = 0; i < bo->placement.num_placement ; i++)
410 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
411
412 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
413 if (ret) {
414 DRM_ERROR("pushing to VRAM failed\n");
415 return ret;
416 }
417 return 0;
418}
419
420int ast_mmap(struct file *filp, struct vm_area_struct *vma)
421{
422 struct drm_file *file_priv;
423 struct ast_private *ast;
424
425 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
426 return -EINVAL;
427
428 file_priv = filp->private_data;
429 ast = file_priv->minor->dev->dev_private;
430 return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
431}
432
