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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_buffer_object *bo,
204 u32 page_flags)
205{
206 struct ttm_tt *tt;
207 int ret;
208
209 tt = kzalloc(sizeof(*tt), GFP_KERNEL);
210 if (!tt) {
211 DRM_ERROR("failed to allocate ttm_tt\n");
212 return NULL;
213 }
214 tt->func = &hibmc_tt_backend_func;
215 ret = ttm_tt_init(tt, bo, page_flags);
216 if (ret) {
217 DRM_ERROR("failed to initialize ttm_tt: %d\n", ret);
218 kfree(tt);
219 return NULL;
220 }
221 return tt;
222}
223
224struct ttm_bo_driver hibmc_bo_driver = {
225 .ttm_tt_create = hibmc_ttm_tt_create,
226 .init_mem_type = hibmc_bo_init_mem_type,
227 .evict_flags = hibmc_bo_evict_flags,
228 .move = NULL,
229 .verify_access = hibmc_bo_verify_access,
230 .io_mem_reserve = &hibmc_ttm_io_mem_reserve,
231 .io_mem_free = NULL,
232};
233
234int hibmc_mm_init(struct hibmc_drm_private *hibmc)
235{
236 int ret;
237 struct drm_device *dev = hibmc->dev;
238 struct ttm_bo_device *bdev = &hibmc->bdev;
239
240 ret = hibmc_ttm_global_init(hibmc);
241 if (ret)
242 return ret;
243
244 ret = ttm_bo_device_init(&hibmc->bdev,
245 hibmc->bo_global_ref.ref.object,
246 &hibmc_bo_driver,
247 dev->anon_inode->i_mapping,
248 DRM_FILE_PAGE_OFFSET,
249 true);
250 if (ret) {
251 hibmc_ttm_global_release(hibmc);
252 DRM_ERROR("error initializing bo driver: %d\n", ret);
253 return ret;
254 }
255
256 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
257 hibmc->fb_size >> PAGE_SHIFT);
258 if (ret) {
259 hibmc_ttm_global_release(hibmc);
260 DRM_ERROR("failed ttm VRAM init: %d\n", ret);
261 return ret;
262 }
263
264 hibmc->mm_inited = true;
265 return 0;
266}
267
268void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
269{
270 if (!hibmc->mm_inited)
271 return;
272
273 ttm_bo_device_release(&hibmc->bdev);
274 hibmc_ttm_global_release(hibmc);
275 hibmc->mm_inited = false;
276}
277
278static void hibmc_bo_unref(struct hibmc_bo **bo)
279{
280 struct ttm_buffer_object *tbo;
281
282 if ((*bo) == NULL)
283 return;
284
285 tbo = &((*bo)->bo);
286 ttm_bo_unref(&tbo);
287 *bo = NULL;
288}
289
290int hibmc_bo_create(struct drm_device *dev, int size, int align,
291 u32 flags, struct hibmc_bo **phibmcbo)
292{
293 struct hibmc_drm_private *hibmc = dev->dev_private;
294 struct hibmc_bo *hibmcbo;
295 size_t acc_size;
296 int ret;
297
298 hibmcbo = kzalloc(sizeof(*hibmcbo), GFP_KERNEL);
299 if (!hibmcbo) {
300 DRM_ERROR("failed to allocate hibmcbo\n");
301 return -ENOMEM;
302 }
303 ret = drm_gem_object_init(dev, &hibmcbo->gem, size);
304 if (ret) {
305 DRM_ERROR("failed to initialize drm gem object: %d\n", ret);
306 kfree(hibmcbo);
307 return ret;
308 }
309
310 hibmcbo->bo.bdev = &hibmc->bdev;
311
312 hibmc_ttm_placement(hibmcbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
313
314 acc_size = ttm_bo_dma_acc_size(&hibmc->bdev, size,
315 sizeof(struct hibmc_bo));
316
317 ret = ttm_bo_init(&hibmc->bdev, &hibmcbo->bo, size,
318 ttm_bo_type_device, &hibmcbo->placement,
319 align >> PAGE_SHIFT, false, acc_size,
320 NULL, NULL, hibmc_bo_ttm_destroy);
321 if (ret) {
322 hibmc_bo_unref(&hibmcbo);
323 DRM_ERROR("failed to initialize ttm_bo: %d\n", ret);
324 return ret;
325 }
326
327 *phibmcbo = hibmcbo;
328 return 0;
329}
330
331int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr)
332{
333 struct ttm_operation_ctx ctx = { false, false };
334 int i, ret;
335
336 if (bo->pin_count) {
337 bo->pin_count++;
338 if (gpu_addr)
339 *gpu_addr = bo->bo.offset;
340 return 0;
341 }
342
343 hibmc_ttm_placement(bo, pl_flag);
344 for (i = 0; i < bo->placement.num_placement; i++)
345 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
346 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
347 if (ret)
348 return ret;
349
350 bo->pin_count = 1;
351 if (gpu_addr)
352 *gpu_addr = bo->bo.offset;
353 return 0;
354}
355
356int hibmc_bo_unpin(struct hibmc_bo *bo)
357{
358 struct ttm_operation_ctx ctx = { false, false };
359 int i, ret;
360
361 if (!bo->pin_count) {
362 DRM_ERROR("unpin bad %p\n", bo);
363 return 0;
364 }
365 bo->pin_count--;
366 if (bo->pin_count)
367 return 0;
368
369 for (i = 0; i < bo->placement.num_placement ; i++)
370 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
371 ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
372 if (ret) {
373 DRM_ERROR("validate failed for unpin: %d\n", ret);
374 return ret;
375 }
376
377 return 0;
378}
379
380int hibmc_mmap(struct file *filp, struct vm_area_struct *vma)
381{
382 struct drm_file *file_priv;
383 struct hibmc_drm_private *hibmc;
384
385 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
386 return -EINVAL;
387
388 file_priv = filp->private_data;
389 hibmc = file_priv->minor->dev->dev_private;
390 return ttm_bo_mmap(filp, vma, &hibmc->bdev);
391}
392
393int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
394 struct drm_gem_object **obj)
395{
396 struct hibmc_bo *hibmcbo;
397 int ret;
398
399 *obj = NULL;
400
401 size = PAGE_ALIGN(size);
402 if (size == 0) {
403 DRM_ERROR("error: zero size\n");
404 return -EINVAL;
405 }
406
407 ret = hibmc_bo_create(dev, size, 0, 0, &hibmcbo);
408 if (ret) {
409 if (ret != -ERESTARTSYS)
410 DRM_ERROR("failed to allocate GEM object: %d\n", ret);
411 return ret;
412 }
413 *obj = &hibmcbo->gem;
414 return 0;
415}
416
417int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
418 struct drm_mode_create_dumb *args)
419{
420 struct drm_gem_object *gobj;
421 u32 handle;
422 int ret;
423
424 args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 16);
425 args->size = args->pitch * args->height;
426
427 ret = hibmc_gem_create(dev, args->size, false,
428 &gobj);
429 if (ret) {
430 DRM_ERROR("failed to create GEM object: %d\n", ret);
431 return ret;
432 }
433
434 ret = drm_gem_handle_create(file, gobj, &handle);
435 drm_gem_object_put_unlocked(gobj);
436 if (ret) {
437 DRM_ERROR("failed to unreference GEM object: %d\n", ret);
438 return ret;
439 }
440
441 args->handle = handle;
442 return 0;
443}
444
445void hibmc_gem_free_object(struct drm_gem_object *obj)
446{
447 struct hibmc_bo *hibmcbo = gem_to_hibmc_bo(obj);
448
449 hibmc_bo_unref(&hibmcbo);
450}
451
452static u64 hibmc_bo_mmap_offset(struct hibmc_bo *bo)
453{
454 return drm_vma_node_offset_addr(&bo->bo.vma_node);
455}
456
457int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
458 u32 handle, u64 *offset)
459{
460 struct drm_gem_object *obj;
461 struct hibmc_bo *bo;
462
463 obj = drm_gem_object_lookup(file, handle);
464 if (!obj)
465 return -ENOENT;
466
467 bo = gem_to_hibmc_bo(obj);
468 *offset = hibmc_bo_mmap_offset(bo);
469
470 drm_gem_object_put_unlocked(obj);
471 return 0;
472}
473
474static void hibmc_user_framebuffer_destroy(struct drm_framebuffer *fb)
475{
476 struct hibmc_framebuffer *hibmc_fb = to_hibmc_framebuffer(fb);
477
478 drm_gem_object_put_unlocked(hibmc_fb->obj);
479 drm_framebuffer_cleanup(fb);
480 kfree(hibmc_fb);
481}
482
483static const struct drm_framebuffer_funcs hibmc_fb_funcs = {
484 .destroy = hibmc_user_framebuffer_destroy,
485};
486
487struct hibmc_framebuffer *
488hibmc_framebuffer_init(struct drm_device *dev,
489 const struct drm_mode_fb_cmd2 *mode_cmd,
490 struct drm_gem_object *obj)
491{
492 struct hibmc_framebuffer *hibmc_fb;
493 int ret;
494
495 hibmc_fb = kzalloc(sizeof(*hibmc_fb), GFP_KERNEL);
496 if (!hibmc_fb) {
497 DRM_ERROR("failed to allocate hibmc_fb\n");
498 return ERR_PTR(-ENOMEM);
499 }
500
501 drm_helper_mode_fill_fb_struct(dev, &hibmc_fb->fb, mode_cmd);
502 hibmc_fb->obj = obj;
503 ret = drm_framebuffer_init(dev, &hibmc_fb->fb, &hibmc_fb_funcs);
504 if (ret) {
505 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
506 kfree(hibmc_fb);
507 return ERR_PTR(ret);
508 }
509
510 return hibmc_fb;
511}
512
513static struct drm_framebuffer *
514hibmc_user_framebuffer_create(struct drm_device *dev,
515 struct drm_file *filp,
516 const struct drm_mode_fb_cmd2 *mode_cmd)
517{
518 struct drm_gem_object *obj;
519 struct hibmc_framebuffer *hibmc_fb;
520
521 DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
522 mode_cmd->width, mode_cmd->height,
523 (mode_cmd->pixel_format) & 0xff,
524 (mode_cmd->pixel_format >> 8) & 0xff,
525 (mode_cmd->pixel_format >> 16) & 0xff,
526 (mode_cmd->pixel_format >> 24) & 0xff);
527
528 obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
529 if (!obj)
530 return ERR_PTR(-ENOENT);
531
532 hibmc_fb = hibmc_framebuffer_init(dev, mode_cmd, obj);
533 if (IS_ERR(hibmc_fb)) {
534 drm_gem_object_put_unlocked(obj);
535 return ERR_PTR((long)hibmc_fb);
536 }
537 return &hibmc_fb->fb;
538}
539
540const struct drm_mode_config_funcs hibmc_mode_funcs = {
541 .atomic_check = drm_atomic_helper_check,
542 .atomic_commit = drm_atomic_helper_commit,
543 .fb_create = hibmc_user_framebuffer_create,
544};
545
