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28#include <drm/drmP.h>
29#include "cirrus_drv.h"
30#include <ttm/ttm_page_alloc.h>
31
32static inline struct cirrus_device *
33cirrus_bdev(struct ttm_bo_device *bd)
34{
35 return container_of(bd, struct cirrus_device, ttm.bdev);
36}
37
38static int
39cirrus_ttm_mem_global_init(struct drm_global_reference *ref)
40{
41 return ttm_mem_global_init(ref->object);
42}
43
44static void
45cirrus_ttm_mem_global_release(struct drm_global_reference *ref)
46{
47 ttm_mem_global_release(ref->object);
48}
49
50static int cirrus_ttm_global_init(struct cirrus_device *cirrus)
51{
52 struct drm_global_reference *global_ref;
53 int r;
54
55 global_ref = &cirrus->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 = &cirrus_ttm_mem_global_init;
59 global_ref->release = &cirrus_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 cirrus->ttm.bo_global_ref.mem_glob =
68 cirrus->ttm.mem_global_ref.object;
69 global_ref = &cirrus->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(&cirrus->ttm.mem_global_ref);
78 return r;
79 }
80 return 0;
81}
82
83static void
84cirrus_ttm_global_release(struct cirrus_device *cirrus)
85{
86 if (cirrus->ttm.mem_global_ref.release == NULL)
87 return;
88
89 drm_global_item_unref(&cirrus->ttm.bo_global_ref.ref);
90 drm_global_item_unref(&cirrus->ttm.mem_global_ref);
91 cirrus->ttm.mem_global_ref.release = NULL;
92}
93
94
95static void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
96{
97 struct cirrus_bo *bo;
98
99 bo = container_of(tbo, struct cirrus_bo, bo);
100
101 drm_gem_object_release(&bo->gem);
102 kfree(bo);
103}
104
105static bool cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object *bo)
106{
107 if (bo->destroy == &cirrus_bo_ttm_destroy)
108 return true;
109 return false;
110}
111
112static int
113cirrus_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
138cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
139{
140 struct cirrus_bo *cirrusbo = cirrus_bo(bo);
141
142 if (!cirrus_ttm_bo_is_cirrus_bo(bo))
143 return;
144
145 cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
146 *pl = cirrusbo->placement;
147}
148
149static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
150{
151 struct cirrus_bo *cirrusbo = cirrus_bo(bo);
152
153 return drm_vma_node_verify_access(&cirrusbo->gem.vma_node, filp);
154}
155
156static int cirrus_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 cirrus_device *cirrus = cirrus_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(cirrus->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 cirrus_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
186{
187}
188
189static int cirrus_bo_move(struct ttm_buffer_object *bo,
190 bool evict, bool interruptible,
191 bool no_wait_gpu,
192 struct ttm_mem_reg *new_mem)
193{
194 int r;
195 r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
196 return r;
197}
198
199
200static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
201{
202 ttm_tt_fini(tt);
203 kfree(tt);
204}
205
206static struct ttm_backend_func cirrus_tt_backend_func = {
207 .destroy = &cirrus_ttm_backend_destroy,
208};
209
210
211static struct ttm_tt *cirrus_ttm_tt_create(struct ttm_bo_device *bdev,
212 unsigned long size, uint32_t page_flags,
213 struct page *dummy_read_page)
214{
215 struct ttm_tt *tt;
216
217 tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
218 if (tt == NULL)
219 return NULL;
220 tt->func = &cirrus_tt_backend_func;
221 if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
222 kfree(tt);
223 return NULL;
224 }
225 return tt;
226}
227
228static int cirrus_ttm_tt_populate(struct ttm_tt *ttm)
229{
230 return ttm_pool_populate(ttm);
231}
232
233static void cirrus_ttm_tt_unpopulate(struct ttm_tt *ttm)
234{
235 ttm_pool_unpopulate(ttm);
236}
237
238struct ttm_bo_driver cirrus_bo_driver = {
239 .ttm_tt_create = cirrus_ttm_tt_create,
240 .ttm_tt_populate = cirrus_ttm_tt_populate,
241 .ttm_tt_unpopulate = cirrus_ttm_tt_unpopulate,
242 .init_mem_type = cirrus_bo_init_mem_type,
243 .evict_flags = cirrus_bo_evict_flags,
244 .move = cirrus_bo_move,
245 .verify_access = cirrus_bo_verify_access,
246 .io_mem_reserve = &cirrus_ttm_io_mem_reserve,
247 .io_mem_free = &cirrus_ttm_io_mem_free,
248};
249
250int cirrus_mm_init(struct cirrus_device *cirrus)
251{
252 int ret;
253 struct drm_device *dev = cirrus->dev;
254 struct ttm_bo_device *bdev = &cirrus->ttm.bdev;
255
256 ret = cirrus_ttm_global_init(cirrus);
257 if (ret)
258 return ret;
259
260 ret = ttm_bo_device_init(&cirrus->ttm.bdev,
261 cirrus->ttm.bo_global_ref.ref.object,
262 &cirrus_bo_driver,
263 dev->anon_inode->i_mapping,
264 DRM_FILE_PAGE_OFFSET,
265 true);
266 if (ret) {
267 DRM_ERROR("Error initialising bo driver; %d\n", ret);
268 return ret;
269 }
270
271 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
272 cirrus->mc.vram_size >> PAGE_SHIFT);
273 if (ret) {
274 DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
275 return ret;
276 }
277
278 cirrus->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
279 pci_resource_len(dev->pdev, 0));
280
281 cirrus->mm_inited = true;
282 return 0;
283}
284
285void cirrus_mm_fini(struct cirrus_device *cirrus)
286{
287 if (!cirrus->mm_inited)
288 return;
289
290 ttm_bo_device_release(&cirrus->ttm.bdev);
291
292 cirrus_ttm_global_release(cirrus);
293
294 arch_phys_wc_del(cirrus->fb_mtrr);
295 cirrus->fb_mtrr = 0;
296}
297
298void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
299{
300 u32 c = 0;
301 unsigned i;
302 bo->placement.placement = bo->placements;
303 bo->placement.busy_placement = bo->placements;
304 if (domain & TTM_PL_FLAG_VRAM)
305 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
306 if (domain & TTM_PL_FLAG_SYSTEM)
307 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
308 if (!c)
309 bo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
310 bo->placement.num_placement = c;
311 bo->placement.num_busy_placement = c;
312 for (i = 0; i < c; ++i) {
313 bo->placements[i].fpfn = 0;
314 bo->placements[i].lpfn = 0;
315 }
316}
317
318int cirrus_bo_create(struct drm_device *dev, int size, int align,
319 uint32_t flags, struct cirrus_bo **pcirrusbo)
320{
321 struct cirrus_device *cirrus = dev->dev_private;
322 struct cirrus_bo *cirrusbo;
323 size_t acc_size;
324 int ret;
325
326 cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
327 if (!cirrusbo)
328 return -ENOMEM;
329
330 ret = drm_gem_object_init(dev, &cirrusbo->gem, size);
331 if (ret) {
332 kfree(cirrusbo);
333 return ret;
334 }
335
336 cirrusbo->bo.bdev = &cirrus->ttm.bdev;
337
338 cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
339
340 acc_size = ttm_bo_dma_acc_size(&cirrus->ttm.bdev, size,
341 sizeof(struct cirrus_bo));
342
343 ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
344 ttm_bo_type_device, &cirrusbo->placement,
345 align >> PAGE_SHIFT, false, NULL, acc_size,
346 NULL, NULL, cirrus_bo_ttm_destroy);
347 if (ret)
348 return ret;
349
350 *pcirrusbo = cirrusbo;
351 return 0;
352}
353
354static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
355{
356 return bo->bo.offset;
357}
358
359int cirrus_bo_pin(struct cirrus_bo *bo, u32 pl_flag, u64 *gpu_addr)
360{
361 int i, ret;
362
363 if (bo->pin_count) {
364 bo->pin_count++;
365 if (gpu_addr)
366 *gpu_addr = cirrus_bo_gpu_offset(bo);
367 }
368
369 cirrus_ttm_placement(bo, pl_flag);
370 for (i = 0; i < bo->placement.num_placement; i++)
371 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
372 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
373 if (ret)
374 return ret;
375
376 bo->pin_count = 1;
377 if (gpu_addr)
378 *gpu_addr = cirrus_bo_gpu_offset(bo);
379 return 0;
380}
381
382int cirrus_bo_push_sysram(struct cirrus_bo *bo)
383{
384 int i, ret;
385 if (!bo->pin_count) {
386 DRM_ERROR("unpin bad %p\n", bo);
387 return 0;
388 }
389 bo->pin_count--;
390 if (bo->pin_count)
391 return 0;
392
393 if (bo->kmap.virtual)
394 ttm_bo_kunmap(&bo->kmap);
395
396 cirrus_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
397 for (i = 0; i < bo->placement.num_placement ; i++)
398 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
399
400 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
401 if (ret) {
402 DRM_ERROR("pushing to VRAM failed\n");
403 return ret;
404 }
405 return 0;
406}
407
408int cirrus_mmap(struct file *filp, struct vm_area_struct *vma)
409{
410 struct drm_file *file_priv;
411 struct cirrus_device *cirrus;
412
413 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
414 return -EINVAL;
415
416 file_priv = filp->private_data;
417 cirrus = file_priv->minor->dev->dev_private;
418 return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
419}
420
