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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_buffer_object *bo,
203 uint32_t page_flags)
204{
205 struct ttm_tt *tt;
206
207 tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
208 if (tt == NULL)
209 return NULL;
210 tt->func = &ast_tt_backend_func;
211 if (ttm_tt_init(tt, bo, page_flags)) {
212 kfree(tt);
213 return NULL;
214 }
215 return tt;
216}
217
218struct ttm_bo_driver ast_bo_driver = {
219 .ttm_tt_create = ast_ttm_tt_create,
220 .init_mem_type = ast_bo_init_mem_type,
221 .eviction_valuable = ttm_bo_eviction_valuable,
222 .evict_flags = ast_bo_evict_flags,
223 .move = NULL,
224 .verify_access = ast_bo_verify_access,
225 .io_mem_reserve = &ast_ttm_io_mem_reserve,
226 .io_mem_free = &ast_ttm_io_mem_free,
227};
228
229int ast_mm_init(struct ast_private *ast)
230{
231 int ret;
232 struct drm_device *dev = ast->dev;
233 struct ttm_bo_device *bdev = &ast->ttm.bdev;
234
235 ret = ast_ttm_global_init(ast);
236 if (ret)
237 return ret;
238
239 ret = ttm_bo_device_init(&ast->ttm.bdev,
240 ast->ttm.bo_global_ref.ref.object,
241 &ast_bo_driver,
242 dev->anon_inode->i_mapping,
243 DRM_FILE_PAGE_OFFSET,
244 true);
245 if (ret) {
246 DRM_ERROR("Error initialising bo driver; %d\n", ret);
247 return ret;
248 }
249
250 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
251 ast->vram_size >> PAGE_SHIFT);
252 if (ret) {
253 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
254 return ret;
255 }
256
257 arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
258 pci_resource_len(dev->pdev, 0));
259 ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
260 pci_resource_len(dev->pdev, 0));
261
262 return 0;
263}
264
265void ast_mm_fini(struct ast_private *ast)
266{
267 struct drm_device *dev = ast->dev;
268
269 ttm_bo_device_release(&ast->ttm.bdev);
270
271 ast_ttm_global_release(ast);
272
273 arch_phys_wc_del(ast->fb_mtrr);
274 arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
275 pci_resource_len(dev->pdev, 0));
276}
277
278void ast_ttm_placement(struct ast_bo *bo, int domain)
279{
280 u32 c = 0;
281 unsigned i;
282
283 bo->placement.placement = bo->placements;
284 bo->placement.busy_placement = bo->placements;
285 if (domain & TTM_PL_FLAG_VRAM)
286 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
287 if (domain & TTM_PL_FLAG_SYSTEM)
288 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
289 if (!c)
290 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM;
291 bo->placement.num_placement = c;
292 bo->placement.num_busy_placement = c;
293 for (i = 0; i < c; ++i) {
294 bo->placements[i].fpfn = 0;
295 bo->placements[i].lpfn = 0;
296 }
297}
298
299int ast_bo_create(struct drm_device *dev, int size, int align,
300 uint32_t flags, struct ast_bo **pastbo)
301{
302 struct ast_private *ast = dev->dev_private;
303 struct ast_bo *astbo;
304 size_t acc_size;
305 int ret;
306
307 astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
308 if (!astbo)
309 return -ENOMEM;
310
311 ret = drm_gem_object_init(dev, &astbo->gem, size);
312 if (ret)
313 goto error;
314
315 astbo->bo.bdev = &ast->ttm.bdev;
316
317 ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
318
319 acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
320 sizeof(struct ast_bo));
321
322 ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
323 ttm_bo_type_device, &astbo->placement,
324 align >> PAGE_SHIFT, false, acc_size,
325 NULL, NULL, ast_bo_ttm_destroy);
326 if (ret)
327 goto error;
328
329 *pastbo = astbo;
330 return 0;
331error:
332 kfree(astbo);
333 return ret;
334}
335
336static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
337{
338 return bo->bo.offset;
339}
340
341int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
342{
343 struct ttm_operation_ctx ctx = { false, false };
344 int i, ret;
345
346 if (bo->pin_count) {
347 bo->pin_count++;
348 if (gpu_addr)
349 *gpu_addr = ast_bo_gpu_offset(bo);
350 }
351
352 ast_ttm_placement(bo, pl_flag);
353 for (i = 0; i < bo->placement.num_placement; i++)
354 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
355 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
356 if (ret)
357 return ret;
358
359 bo->pin_count = 1;
360 if (gpu_addr)
361 *gpu_addr = ast_bo_gpu_offset(bo);
362 return 0;
363}
364
365int ast_bo_unpin(struct ast_bo *bo)
366{
367 struct ttm_operation_ctx ctx = { false, false };
368 int i;
369 if (!bo->pin_count) {
370 DRM_ERROR("unpin bad %p\n", bo);
371 return 0;
372 }
373 bo->pin_count--;
374 if (bo->pin_count)
375 return 0;
376
377 for (i = 0; i < bo->placement.num_placement ; i++)
378 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
379 return ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
380}
381
382int ast_bo_push_sysram(struct ast_bo *bo)
383{
384 struct ttm_operation_ctx ctx = { false, false };
385 int i, ret;
386 if (!bo->pin_count) {
387 DRM_ERROR("unpin bad %p\n", bo);
388 return 0;
389 }
390 bo->pin_count--;
391 if (bo->pin_count)
392 return 0;
393
394 if (bo->kmap.virtual)
395 ttm_bo_kunmap(&bo->kmap);
396
397 ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
398 for (i = 0; i < bo->placement.num_placement ; i++)
399 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
400
401 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
402 if (ret) {
403 DRM_ERROR("pushing to VRAM failed\n");
404 return ret;
405 }
406 return 0;
407}
408
409int ast_mmap(struct file *filp, struct vm_area_struct *vma)
410{
411 struct drm_file *file_priv;
412 struct ast_private *ast;
413
414 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
415 return -EINVAL;
416
417 file_priv = filp->private_data;
418 ast = file_priv->minor->dev->dev_private;
419 return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
420}
421
