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19#include <drm/drm_atomic_helper.h>
20#include <drm/ttm/ttm_page_alloc.h>
21
22#include "hibmc_drm_drv.h"
23
24#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
25
26static inline struct hibmc_drm_private *
27hibmc_bdev(struct ttm_bo_device *bd)
28{
29 return container_of(bd, struct hibmc_drm_private, bdev);
30}
31
32static int
33hibmc_ttm_mem_global_init(struct drm_global_reference *ref)
34{
35 return ttm_mem_global_init(ref->object);
36}
37
38static void
39hibmc_ttm_mem_global_release(struct drm_global_reference *ref)
40{
41 ttm_mem_global_release(ref->object);
42}
43
44static int hibmc_ttm_global_init(struct hibmc_drm_private *hibmc)
45{
46 int ret;
47
48 hibmc->mem_global_ref.global_type = DRM_GLOBAL_TTM_MEM;
49 hibmc->mem_global_ref.size = sizeof(struct ttm_mem_global);
50 hibmc->mem_global_ref.init = &hibmc_ttm_mem_global_init;
51 hibmc->mem_global_ref.release = &hibmc_ttm_mem_global_release;
52 ret = drm_global_item_ref(&hibmc->mem_global_ref);
53 if (ret) {
54 DRM_ERROR("could not get ref on ttm global: %d\n", ret);
55 return ret;
56 }
57
58 hibmc->bo_global_ref.mem_glob =
59 hibmc->mem_global_ref.object;
60 hibmc->bo_global_ref.ref.global_type = DRM_GLOBAL_TTM_BO;
61 hibmc->bo_global_ref.ref.size = sizeof(struct ttm_bo_global);
62 hibmc->bo_global_ref.ref.init = &ttm_bo_global_init;
63 hibmc->bo_global_ref.ref.release = &ttm_bo_global_release;
64 ret = drm_global_item_ref(&hibmc->bo_global_ref.ref);
65 if (ret) {
66 DRM_ERROR("failed setting up TTM BO subsystem: %d\n", ret);
67 drm_global_item_unref(&hibmc->mem_global_ref);
68 return ret;
69 }
70 return 0;
71}
72
73static void
74hibmc_ttm_global_release(struct hibmc_drm_private *hibmc)
75{
76 drm_global_item_unref(&hibmc->bo_global_ref.ref);
77 drm_global_item_unref(&hibmc->mem_global_ref);
78 hibmc->mem_global_ref.release = NULL;
79}
80
81static void hibmc_bo_ttm_destroy(struct ttm_buffer_object *tbo)
82{
83 struct hibmc_bo *bo = container_of(tbo, struct hibmc_bo, bo);
84
85 drm_gem_object_release(&bo->gem);
86 kfree(bo);
87}
88
89static bool hibmc_ttm_bo_is_hibmc_bo(struct ttm_buffer_object *bo)
90{
91 return bo->destroy == &hibmc_bo_ttm_destroy;
92}
93
94static int
95hibmc_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
96 struct ttm_mem_type_manager *man)
97{
98 switch (type) {
99 case TTM_PL_SYSTEM:
100 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
101 man->available_caching = TTM_PL_MASK_CACHING;
102 man->default_caching = TTM_PL_FLAG_CACHED;
103 break;
104 case TTM_PL_VRAM:
105 man->func = &ttm_bo_manager_func;
106 man->flags = TTM_MEMTYPE_FLAG_FIXED |
107 TTM_MEMTYPE_FLAG_MAPPABLE;
108 man->available_caching = TTM_PL_FLAG_UNCACHED |
109 TTM_PL_FLAG_WC;
110 man->default_caching = TTM_PL_FLAG_WC;
111 break;
112 default:
113 DRM_ERROR("unsupported memory type %u\n", type);
114 return -EINVAL;
115 }
116 return 0;
117}
118
119void hibmc_ttm_placement(struct hibmc_bo *bo, int domain)
120{
121 u32 count = 0;
122 u32 i;
123
124 bo->placement.placement = bo->placements;
125 bo->placement.busy_placement = bo->placements;
126 if (domain & TTM_PL_FLAG_VRAM)
127 bo->placements[count++].flags = TTM_PL_FLAG_WC |
128 TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
129 if (domain & TTM_PL_FLAG_SYSTEM)
130 bo->placements[count++].flags = TTM_PL_MASK_CACHING |
131 TTM_PL_FLAG_SYSTEM;
132 if (!count)
133 bo->placements[count++].flags = TTM_PL_MASK_CACHING |
134 TTM_PL_FLAG_SYSTEM;
135
136 bo->placement.num_placement = count;
137 bo->placement.num_busy_placement = count;
138 for (i = 0; i < count; i++) {
139 bo->placements[i].fpfn = 0;
140 bo->placements[i].lpfn = 0;
141 }
142}
143
144static void
145hibmc_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
146{
147 struct hibmc_bo *hibmcbo = hibmc_bo(bo);
148
149 if (!hibmc_ttm_bo_is_hibmc_bo(bo))
150 return;
151
152 hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_SYSTEM);
153 *pl = hibmcbo->placement;
154}
155
156static int hibmc_bo_verify_access(struct ttm_buffer_object *bo,
157 struct file *filp)
158{
159 struct hibmc_bo *hibmcbo = hibmc_bo(bo);
160
161 return drm_vma_node_verify_access(&hibmcbo->gem.vma_node,
162 filp->private_data);
163}
164
165static int hibmc_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
166 struct ttm_mem_reg *mem)
167{
168 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
169 struct hibmc_drm_private *hibmc = hibmc_bdev(bdev);
170
171 mem->bus.addr = NULL;
172 mem->bus.offset = 0;
173 mem->bus.size = mem->num_pages << PAGE_SHIFT;
174 mem->bus.base = 0;
175 mem->bus.is_iomem = false;
176 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
177 return -EINVAL;
178 switch (mem->mem_type) {
179 case TTM_PL_SYSTEM:
180
181 return 0;
182 case TTM_PL_VRAM:
183 mem->bus.offset = mem->start << PAGE_SHIFT;
184 mem->bus.base = pci_resource_start(hibmc->dev->pdev, 0);
185 mem->bus.is_iomem = true;
186 break;
187 default:
188 return -EINVAL;
189 }
190 return 0;
191}
192
193static void hibmc_ttm_backend_destroy(struct ttm_tt *tt)
194{
195 ttm_tt_fini(tt);
196 kfree(tt);
197}
198
199static struct ttm_backend_func hibmc_tt_backend_func = {
200 .destroy = &hibmc_ttm_backend_destroy,
201};
202
203static struct ttm_tt *hibmc_ttm_tt_create(struct ttm_bo_device *bdev,
204 unsigned long size,
205 u32 page_flags,
206 struct page *dummy_read_page)
207{
208 struct ttm_tt *tt;
209 int ret;
210
211 tt = kzalloc(sizeof(*tt), GFP_KERNEL);
212 if (!tt) {
213 DRM_ERROR("failed to allocate ttm_tt\n");
214 return NULL;
215 }
216 tt->func = &hibmc_tt_backend_func;
217 ret = ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page);
218 if (ret) {
219 DRM_ERROR("failed to initialize ttm_tt: %d\n", ret);
220 kfree(tt);
221 return NULL;
222 }
223 return tt;
224}
225
226static int hibmc_ttm_tt_populate(struct ttm_tt *ttm)
227{
228 return ttm_pool_populate(ttm);
229}
230
231static void hibmc_ttm_tt_unpopulate(struct ttm_tt *ttm)
232{
233 ttm_pool_unpopulate(ttm);
234}
235
236struct ttm_bo_driver hibmc_bo_driver = {
237 .ttm_tt_create = hibmc_ttm_tt_create,
238 .ttm_tt_populate = hibmc_ttm_tt_populate,
239 .ttm_tt_unpopulate = hibmc_ttm_tt_unpopulate,
240 .init_mem_type = hibmc_bo_init_mem_type,
241 .evict_flags = hibmc_bo_evict_flags,
242 .move = NULL,
243 .verify_access = hibmc_bo_verify_access,
244 .io_mem_reserve = &hibmc_ttm_io_mem_reserve,
245 .io_mem_free = NULL,
246};
247
248int hibmc_mm_init(struct hibmc_drm_private *hibmc)
249{
250 int ret;
251 struct drm_device *dev = hibmc->dev;
252 struct ttm_bo_device *bdev = &hibmc->bdev;
253
254 ret = hibmc_ttm_global_init(hibmc);
255 if (ret)
256 return ret;
257
258 ret = ttm_bo_device_init(&hibmc->bdev,
259 hibmc->bo_global_ref.ref.object,
260 &hibmc_bo_driver,
261 dev->anon_inode->i_mapping,
262 DRM_FILE_PAGE_OFFSET,
263 true);
264 if (ret) {
265 hibmc_ttm_global_release(hibmc);
266 DRM_ERROR("error initializing bo driver: %d\n", ret);
267 return ret;
268 }
269
270 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
271 hibmc->fb_size >> PAGE_SHIFT);
272 if (ret) {
273 hibmc_ttm_global_release(hibmc);
274 DRM_ERROR("failed ttm VRAM init: %d\n", ret);
275 return ret;
276 }
277
278 hibmc->mm_inited = true;
279 return 0;
280}
281
282void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
283{
284 if (!hibmc->mm_inited)
285 return;
286
287 ttm_bo_device_release(&hibmc->bdev);
288 hibmc_ttm_global_release(hibmc);
289 hibmc->mm_inited = false;
290}
291
292static void hibmc_bo_unref(struct hibmc_bo **bo)
293{
294 struct ttm_buffer_object *tbo;
295
296 if ((*bo) == NULL)
297 return;
298
299 tbo = &((*bo)->bo);
300 ttm_bo_unref(&tbo);
301 *bo = NULL;
302}
303
304int hibmc_bo_create(struct drm_device *dev, int size, int align,
305 u32 flags, struct hibmc_bo **phibmcbo)
306{
307 struct hibmc_drm_private *hibmc = dev->dev_private;
308 struct hibmc_bo *hibmcbo;
309 size_t acc_size;
310 int ret;
311
312 hibmcbo = kzalloc(sizeof(*hibmcbo), GFP_KERNEL);
313 if (!hibmcbo) {
314 DRM_ERROR("failed to allocate hibmcbo\n");
315 return -ENOMEM;
316 }
317 ret = drm_gem_object_init(dev, &hibmcbo->gem, size);
318 if (ret) {
319 DRM_ERROR("failed to initialize drm gem object: %d\n", ret);
320 kfree(hibmcbo);
321 return ret;
322 }
323
324 hibmcbo->bo.bdev = &hibmc->bdev;
325
326 hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
327
328 acc_size = ttm_bo_dma_acc_size(&hibmc->bdev, size,
329 sizeof(struct hibmc_bo));
330
331 ret = ttm_bo_init(&hibmc->bdev, &hibmcbo->bo, size,
332 ttm_bo_type_device, &hibmcbo->placement,
333 align >> PAGE_SHIFT, false, NULL, acc_size,
334 NULL, NULL, hibmc_bo_ttm_destroy);
335 if (ret) {
336 hibmc_bo_unref(&hibmcbo);
337 DRM_ERROR("failed to initialize ttm_bo: %d\n", ret);
338 return ret;
339 }
340
341 *phibmcbo = hibmcbo;
342 return 0;
343}
344
345int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr)
346{
347 int i, ret;
348
349 if (bo->pin_count) {
350 bo->pin_count++;
351 if (gpu_addr)
352 *gpu_addr = bo->bo.offset;
353 return 0;
354 }
355
356 hibmc_ttm_placement(bo, pl_flag);
357 for (i = 0; i < bo->placement.num_placement; i++)
358 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
359 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
360 if (ret)
361 return ret;
362
363 bo->pin_count = 1;
364 if (gpu_addr)
365 *gpu_addr = bo->bo.offset;
366 return 0;
367}
368
369int hibmc_bo_unpin(struct hibmc_bo *bo)
370{
371 int i, ret;
372
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 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
384 if (ret) {
385 DRM_ERROR("validate failed for unpin: %d\n", ret);
386 return ret;
387 }
388
389 return 0;
390}
391
392int hibmc_mmap(struct file *filp, struct vm_area_struct *vma)
393{
394 struct drm_file *file_priv;
395 struct hibmc_drm_private *hibmc;
396
397 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
398 return -EINVAL;
399
400 file_priv = filp->private_data;
401 hibmc = file_priv->minor->dev->dev_private;
402 return ttm_bo_mmap(filp, vma, &hibmc->bdev);
403}
404
405int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
406 struct drm_gem_object **obj)
407{
408 struct hibmc_bo *hibmcbo;
409 int ret;
410
411 *obj = NULL;
412
413 size = PAGE_ALIGN(size);
414 if (size == 0) {
415 DRM_ERROR("error: zero size\n");
416 return -EINVAL;
417 }
418
419 ret = hibmc_bo_create(dev, size, 0, 0, &hibmcbo);
420 if (ret) {
421 if (ret != -ERESTARTSYS)
422 DRM_ERROR("failed to allocate GEM object: %d\n", ret);
423 return ret;
424 }
425 *obj = &hibmcbo->gem;
426 return 0;
427}
428
429int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
430 struct drm_mode_create_dumb *args)
431{
432 struct drm_gem_object *gobj;
433 u32 handle;
434 int ret;
435
436 args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 16);
437 args->size = args->pitch * args->height;
438
439 ret = hibmc_gem_create(dev, args->size, false,
440 &gobj);
441 if (ret) {
442 DRM_ERROR("failed to create GEM object: %d\n", ret);
443 return ret;
444 }
445
446 ret = drm_gem_handle_create(file, gobj, &handle);
447 drm_gem_object_unreference_unlocked(gobj);
448 if (ret) {
449 DRM_ERROR("failed to unreference GEM object: %d\n", ret);
450 return ret;
451 }
452
453 args->handle = handle;
454 return 0;
455}
456
457void hibmc_gem_free_object(struct drm_gem_object *obj)
458{
459 struct hibmc_bo *hibmcbo = gem_to_hibmc_bo(obj);
460
461 hibmc_bo_unref(&hibmcbo);
462}
463
464static u64 hibmc_bo_mmap_offset(struct hibmc_bo *bo)
465{
466 return drm_vma_node_offset_addr(&bo->bo.vma_node);
467}
468
469int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
470 u32 handle, u64 *offset)
471{
472 struct drm_gem_object *obj;
473 struct hibmc_bo *bo;
474
475 obj = drm_gem_object_lookup(file, handle);
476 if (!obj)
477 return -ENOENT;
478
479 bo = gem_to_hibmc_bo(obj);
480 *offset = hibmc_bo_mmap_offset(bo);
481
482 drm_gem_object_unreference_unlocked(obj);
483 return 0;
484}
485
486static void hibmc_user_framebuffer_destroy(struct drm_framebuffer *fb)
487{
488 struct hibmc_framebuffer *hibmc_fb = to_hibmc_framebuffer(fb);
489
490 drm_gem_object_unreference_unlocked(hibmc_fb->obj);
491 drm_framebuffer_cleanup(fb);
492 kfree(hibmc_fb);
493}
494
495static const struct drm_framebuffer_funcs hibmc_fb_funcs = {
496 .destroy = hibmc_user_framebuffer_destroy,
497};
498
499struct hibmc_framebuffer *
500hibmc_framebuffer_init(struct drm_device *dev,
501 const struct drm_mode_fb_cmd2 *mode_cmd,
502 struct drm_gem_object *obj)
503{
504 struct hibmc_framebuffer *hibmc_fb;
505 int ret;
506
507 hibmc_fb = kzalloc(sizeof(*hibmc_fb), GFP_KERNEL);
508 if (!hibmc_fb) {
509 DRM_ERROR("failed to allocate hibmc_fb\n");
510 return ERR_PTR(-ENOMEM);
511 }
512
513 drm_helper_mode_fill_fb_struct(dev, &hibmc_fb->fb, mode_cmd);
514 hibmc_fb->obj = obj;
515 ret = drm_framebuffer_init(dev, &hibmc_fb->fb, &hibmc_fb_funcs);
516 if (ret) {
517 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
518 kfree(hibmc_fb);
519 return ERR_PTR(ret);
520 }
521
522 return hibmc_fb;
523}
524
525static struct drm_framebuffer *
526hibmc_user_framebuffer_create(struct drm_device *dev,
527 struct drm_file *filp,
528 const struct drm_mode_fb_cmd2 *mode_cmd)
529{
530 struct drm_gem_object *obj;
531 struct hibmc_framebuffer *hibmc_fb;
532
533 DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
534 mode_cmd->width, mode_cmd->height,
535 (mode_cmd->pixel_format) & 0xff,
536 (mode_cmd->pixel_format >> 8) & 0xff,
537 (mode_cmd->pixel_format >> 16) & 0xff,
538 (mode_cmd->pixel_format >> 24) & 0xff);
539
540 obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
541 if (!obj)
542 return ERR_PTR(-ENOENT);
543
544 hibmc_fb = hibmc_framebuffer_init(dev, mode_cmd, obj);
545 if (IS_ERR(hibmc_fb)) {
546 drm_gem_object_unreference_unlocked(obj);
547 return ERR_PTR((long)hibmc_fb);
548 }
549 return &hibmc_fb->fb;
550}
551
552const struct drm_mode_config_funcs hibmc_mode_funcs = {
553 .atomic_check = drm_atomic_helper_check,
554 .atomic_commit = drm_atomic_helper_commit,
555 .fb_create = hibmc_user_framebuffer_create,
556};
557
