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28#include <drm/drmP.h>
29#include "ast_drv.h"
30#include <ttm/ttm_page_alloc.h>
31
32static inline struct ast_private *
33ast_bdev(struct ttm_bo_device *bd)
34{
35 return container_of(bd, struct ast_private, ttm.bdev);
36}
37
38static int
39ast_ttm_mem_global_init(struct drm_global_reference *ref)
40{
41 return ttm_mem_global_init(ref->object);
42}
43
44static void
45ast_ttm_mem_global_release(struct drm_global_reference *ref)
46{
47 ttm_mem_global_release(ref->object);
48}
49
50static int ast_ttm_global_init(struct ast_private *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 = &ast_ttm_mem_global_init;
59 global_ref->release = &ast_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
84ast_ttm_global_release(struct ast_private *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 ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
96{
97 struct ast_bo *bo;
98
99 bo = container_of(tbo, struct ast_bo, bo);
100
101 drm_gem_object_release(&bo->gem);
102 kfree(bo);
103}
104
105bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
106{
107 if (bo->destroy == &ast_bo_ttm_destroy)
108 return true;
109 return false;
110}
111
112static int
113ast_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
138ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
139{
140 struct ast_bo *astbo = ast_bo(bo);
141
142 if (!ast_ttm_bo_is_ast_bo(bo))
143 return;
144
145 ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
146 *pl = astbo->placement;
147}
148
149static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
150{
151 return 0;
152}
153
154static int ast_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 ast_private *ast = ast_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(ast->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 ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
184{
185}
186
187static int ast_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 ast_ttm_backend_destroy(struct ttm_tt *tt)
199{
200 ttm_tt_fini(tt);
201 kfree(tt);
202}
203
204static struct ttm_backend_func ast_tt_backend_func = {
205 .destroy = &ast_ttm_backend_destroy,
206};
207
208
209struct ttm_tt *ast_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 = &ast_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 ast_ttm_tt_populate(struct ttm_tt *ttm)
227{
228 return ttm_pool_populate(ttm);
229}
230
231static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
232{
233 ttm_pool_unpopulate(ttm);
234}
235
236struct ttm_bo_driver ast_bo_driver = {
237 .ttm_tt_create = ast_ttm_tt_create,
238 .ttm_tt_populate = ast_ttm_tt_populate,
239 .ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
240 .init_mem_type = ast_bo_init_mem_type,
241 .evict_flags = ast_bo_evict_flags,
242 .move = ast_bo_move,
243 .verify_access = ast_bo_verify_access,
244 .io_mem_reserve = &ast_ttm_io_mem_reserve,
245 .io_mem_free = &ast_ttm_io_mem_free,
246};
247
248int ast_mm_init(struct ast_private *ast)
249{
250 int ret;
251 struct drm_device *dev = ast->dev;
252 struct ttm_bo_device *bdev = &ast->ttm.bdev;
253
254 ret = ast_ttm_global_init(ast);
255 if (ret)
256 return ret;
257
258 ret = ttm_bo_device_init(&ast->ttm.bdev,
259 ast->ttm.bo_global_ref.ref.object,
260 &ast_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,
268 ast->vram_size >> PAGE_SHIFT);
269 if (ret) {
270 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
271 return ret;
272 }
273
274 ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
275 pci_resource_len(dev->pdev, 0));
276
277 return 0;
278}
279
280void ast_mm_fini(struct ast_private *ast)
281{
282 ttm_bo_device_release(&ast->ttm.bdev);
283
284 ast_ttm_global_release(ast);
285
286 arch_phys_wc_del(ast->fb_mtrr);
287}
288
289void ast_ttm_placement(struct ast_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 ast_bo_create(struct drm_device *dev, int size, int align,
307 uint32_t flags, struct ast_bo **pastbo)
308{
309 struct ast_private *ast = dev->dev_private;
310 struct ast_bo *astbo;
311 size_t acc_size;
312 int ret;
313
314 astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
315 if (!astbo)
316 return -ENOMEM;
317
318 ret = drm_gem_object_init(dev, &astbo->gem, size);
319 if (ret) {
320 kfree(astbo);
321 return ret;
322 }
323
324 astbo->gem.driver_private = NULL;
325 astbo->bo.bdev = &ast->ttm.bdev;
326 astbo->bo.bdev->dev_mapping = dev->dev_mapping;
327
328 ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
329
330 acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
331 sizeof(struct ast_bo));
332
333 ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
334 ttm_bo_type_device, &astbo->placement,
335 align >> PAGE_SHIFT, false, NULL, acc_size,
336 NULL, ast_bo_ttm_destroy);
337 if (ret)
338 return ret;
339
340 *pastbo = astbo;
341 return 0;
342}
343
344static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
345{
346 return bo->bo.offset;
347}
348
349int ast_bo_pin(struct ast_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 = ast_bo_gpu_offset(bo);
357 }
358
359 ast_ttm_placement(bo, pl_flag);
360 for (i = 0; i < bo->placement.num_placement; i++)
361 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
362 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
363 if (ret)
364 return ret;
365
366 bo->pin_count = 1;
367 if (gpu_addr)
368 *gpu_addr = ast_bo_gpu_offset(bo);
369 return 0;
370}
371
372int ast_bo_unpin(struct ast_bo *bo)
373{
374 int i, ret;
375 if (!bo->pin_count) {
376 DRM_ERROR("unpin bad %p\n", bo);
377 return 0;
378 }
379 bo->pin_count--;
380 if (bo->pin_count)
381 return 0;
382
383 for (i = 0; i < bo->placement.num_placement ; i++)
384 bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
385 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
386 if (ret)
387 return ret;
388
389 return 0;
390}
391
392int ast_bo_push_sysram(struct ast_bo *bo)
393{
394 int i, ret;
395 if (!bo->pin_count) {
396 DRM_ERROR("unpin bad %p\n", bo);
397 return 0;
398 }
399 bo->pin_count--;
400 if (bo->pin_count)
401 return 0;
402
403 if (bo->kmap.virtual)
404 ttm_bo_kunmap(&bo->kmap);
405
406 ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
407 for (i = 0; i < bo->placement.num_placement ; i++)
408 bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
409
410 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
411 if (ret) {
412 DRM_ERROR("pushing to VRAM failed\n");
413 return ret;
414 }
415 return 0;
416}
417
418int ast_mmap(struct file *filp, struct vm_area_struct *vma)
419{
420 struct drm_file *file_priv;
421 struct ast_private *ast;
422
423 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
424 return drm_mmap(filp, vma);
425
426 file_priv = filp->private_data;
427 ast = file_priv->minor->dev->dev_private;
428 return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
429}
430
