1 /*
2  * Copyright 2008 Advanced Micro Devices, Inc.
3  * Copyright 2008 Red Hat Inc.
4  * Copyright 2009 Jerome Glisse.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  * Authors: Dave Airlie
25  *          Alex Deucher
26  *          Jerome Glisse
27  */
28 #include <linux/ktime.h>
29 #include <linux/module.h>
30 #include <linux/pagemap.h>
31 #include <linux/pci.h>
32 #include <linux/dma-buf.h>
33 
34 #include <drm/amdgpu_drm.h>
35 #include <drm/drm_drv.h>
36 #include <drm/drm_exec.h>
37 #include <drm/drm_gem_ttm_helper.h>
38 #include <drm/ttm/ttm_tt.h>
39 
40 #include "amdgpu.h"
41 #include "amdgpu_display.h"
42 #include "amdgpu_dma_buf.h"
43 #include "amdgpu_hmm.h"
44 #include "amdgpu_xgmi.h"
45 
46 static const struct drm_gem_object_funcs amdgpu_gem_object_funcs;
47 
48 static vm_fault_t amdgpu_gem_fault(struct vm_fault *vmf)
49 {
50 	struct ttm_buffer_object *bo = vmf->vma->vm_private_data;
51 	struct drm_device *ddev = bo->base.dev;
52 	vm_fault_t ret;
53 	int idx;
54 
55 	ret = ttm_bo_vm_reserve(bo, vmf);
56 	if (ret)
57 		return ret;
58 
59 	if (drm_dev_enter(ddev, &idx)) {
60 		ret = amdgpu_bo_fault_reserve_notify(bo);
61 		if (ret) {
62 			drm_dev_exit(idx);
63 			goto unlock;
64 		}
65 
66 		ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot,
67 					       TTM_BO_VM_NUM_PREFAULT);
68 
69 		drm_dev_exit(idx);
70 	} else {
71 		ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot);
72 	}
73 	if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
74 		return ret;
75 
76 unlock:
77 	dma_resv_unlock(bo->base.resv);
78 	return ret;
79 }
80 
81 static const struct vm_operations_struct amdgpu_gem_vm_ops = {
82 	.fault = amdgpu_gem_fault,
83 	.open = ttm_bo_vm_open,
84 	.close = ttm_bo_vm_close,
85 	.access = ttm_bo_vm_access
86 };
87 
88 static void amdgpu_gem_object_free(struct drm_gem_object *gobj)
89 {
90 	struct amdgpu_bo *robj = gem_to_amdgpu_bo(gobj);
91 
92 	if (robj) {
93 		amdgpu_hmm_unregister(robj);
94 		amdgpu_bo_unref(&robj);
95 	}
96 }
97 
98 int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
99 			     int alignment, u32 initial_domain,
100 			     u64 flags, enum ttm_bo_type type,
101 			     struct dma_resv *resv,
102 			     struct drm_gem_object **obj, int8_t xcp_id_plus1)
103 {
104 	struct amdgpu_bo *bo;
105 	struct amdgpu_bo_user *ubo;
106 	struct amdgpu_bo_param bp;
107 	int r;
108 
109 	memset(&bp, 0, sizeof(bp));
110 	*obj = NULL;
111 
112 	bp.size = size;
113 	bp.byte_align = alignment;
114 	bp.type = type;
115 	bp.resv = resv;
116 	bp.preferred_domain = initial_domain;
117 	bp.flags = flags;
118 	bp.domain = initial_domain;
119 	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
120 	bp.xcp_id_plus1 = xcp_id_plus1;
121 
122 	r = amdgpu_bo_create_user(adev, &bp, &ubo);
123 	if (r)
124 		return r;
125 
126 	bo = &ubo->bo;
127 	*obj = &bo->tbo.base;
128 	(*obj)->funcs = &amdgpu_gem_object_funcs;
129 
130 	return 0;
131 }
132 
133 void amdgpu_gem_force_release(struct amdgpu_device *adev)
134 {
135 	struct drm_device *ddev = adev_to_drm(adev);
136 	struct drm_file *file;
137 
138 	mutex_lock(&ddev->filelist_mutex);
139 
140 	list_for_each_entry(file, &ddev->filelist, lhead) {
141 		struct drm_gem_object *gobj;
142 		int handle;
143 
144 		WARN_ONCE(1, "Still active user space clients!\n");
145 		spin_lock(&file->table_lock);
146 		idr_for_each_entry(&file->object_idr, gobj, handle) {
147 			WARN_ONCE(1, "And also active allocations!\n");
148 			drm_gem_object_put(gobj);
149 		}
150 		idr_destroy(&file->object_idr);
151 		spin_unlock(&file->table_lock);
152 	}
153 
154 	mutex_unlock(&ddev->filelist_mutex);
155 }
156 
157 /*
158  * Call from drm_gem_handle_create which appear in both new and open ioctl
159  * case.
160  */
161 static int amdgpu_gem_object_open(struct drm_gem_object *obj,
162 				  struct drm_file *file_priv)
163 {
164 	struct amdgpu_bo *abo = gem_to_amdgpu_bo(obj);
165 	struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
166 	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
167 	struct amdgpu_vm *vm = &fpriv->vm;
168 	struct amdgpu_bo_va *bo_va;
169 	struct mm_struct *mm;
170 	int r;
171 
172 	mm = amdgpu_ttm_tt_get_usermm(abo->tbo.ttm);
173 	if (mm && mm != current->mm)
174 		return -EPERM;
175 
176 	if (abo->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID &&
177 	    abo->tbo.base.resv != vm->root.bo->tbo.base.resv)
178 		return -EPERM;
179 
180 	r = amdgpu_bo_reserve(abo, false);
181 	if (r)
182 		return r;
183 
184 	bo_va = amdgpu_vm_bo_find(vm, abo);
185 	if (!bo_va)
186 		bo_va = amdgpu_vm_bo_add(adev, vm, abo);
187 	else
188 		++bo_va->ref_count;
189 	amdgpu_bo_unreserve(abo);
190 	return 0;
191 }
192 
193 static void amdgpu_gem_object_close(struct drm_gem_object *obj,
194 				    struct drm_file *file_priv)
195 {
196 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
197 	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
198 	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
199 	struct amdgpu_vm *vm = &fpriv->vm;
200 
201 	struct dma_fence *fence = NULL;
202 	struct amdgpu_bo_va *bo_va;
203 	struct drm_exec exec;
204 	long r;
205 
206 	drm_exec_init(&exec, DRM_EXEC_IGNORE_DUPLICATES);
207 	drm_exec_until_all_locked(&exec) {
208 		r = drm_exec_prepare_obj(&exec, &bo->tbo.base, 1);
209 		drm_exec_retry_on_contention(&exec);
210 		if (unlikely(r))
211 			goto out_unlock;
212 
213 		r = amdgpu_vm_lock_pd(vm, &exec, 0);
214 		drm_exec_retry_on_contention(&exec);
215 		if (unlikely(r))
216 			goto out_unlock;
217 	}
218 
219 	bo_va = amdgpu_vm_bo_find(vm, bo);
220 	if (!bo_va || --bo_va->ref_count)
221 		goto out_unlock;
222 
223 	amdgpu_vm_bo_del(adev, bo_va);
224 	if (!amdgpu_vm_ready(vm))
225 		goto out_unlock;
226 
227 	r = amdgpu_vm_clear_freed(adev, vm, &fence);
228 	if (unlikely(r < 0))
229 		dev_err(adev->dev, "failed to clear page "
230 			"tables on GEM object close (%ld)\n", r);
231 	if (r || !fence)
232 		goto out_unlock;
233 
234 	amdgpu_bo_fence(bo, fence, true);
235 	dma_fence_put(fence);
236 
237 out_unlock:
238 	if (r)
239 		dev_err(adev->dev, "leaking bo va (%ld)\n", r);
240 	drm_exec_fini(&exec);
241 }
242 
243 static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
244 {
245 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
246 
247 	if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
248 		return -EPERM;
249 	if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
250 		return -EPERM;
251 
252 	/* Workaround for Thunk bug creating PROT_NONE,MAP_PRIVATE mappings
253 	 * for debugger access to invisible VRAM. Should have used MAP_SHARED
254 	 * instead. Clearing VM_MAYWRITE prevents the mapping from ever
255 	 * becoming writable and makes is_cow_mapping(vm_flags) false.
256 	 */
257 	if (is_cow_mapping(vma->vm_flags) &&
258 	    !(vma->vm_flags & VM_ACCESS_FLAGS))
259 		vm_flags_clear(vma, VM_MAYWRITE);
260 
261 	return drm_gem_ttm_mmap(obj, vma);
262 }
263 
264 static const struct drm_gem_object_funcs amdgpu_gem_object_funcs = {
265 	.free = amdgpu_gem_object_free,
266 	.open = amdgpu_gem_object_open,
267 	.close = amdgpu_gem_object_close,
268 	.export = amdgpu_gem_prime_export,
269 	.vmap = drm_gem_ttm_vmap,
270 	.vunmap = drm_gem_ttm_vunmap,
271 	.mmap = amdgpu_gem_object_mmap,
272 	.vm_ops = &amdgpu_gem_vm_ops,
273 };
274 
275 /*
276  * GEM ioctls.
277  */
278 int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
279 			    struct drm_file *filp)
280 {
281 	struct amdgpu_device *adev = drm_to_adev(dev);
282 	struct amdgpu_fpriv *fpriv = filp->driver_priv;
283 	struct amdgpu_vm *vm = &fpriv->vm;
284 	union drm_amdgpu_gem_create *args = data;
285 	uint64_t flags = args->in.domain_flags;
286 	uint64_t size = args->in.bo_size;
287 	struct dma_resv *resv = NULL;
288 	struct drm_gem_object *gobj;
289 	uint32_t handle, initial_domain;
290 	int r;
291 
292 	/* reject DOORBELLs until userspace code to use it is available */
293 	if (args->in.domains & AMDGPU_GEM_DOMAIN_DOORBELL)
294 		return -EINVAL;
295 
296 	/* reject invalid gem flags */
297 	if (flags & ~(AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
298 		      AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
299 		      AMDGPU_GEM_CREATE_CPU_GTT_USWC |
300 		      AMDGPU_GEM_CREATE_VRAM_CLEARED |
301 		      AMDGPU_GEM_CREATE_VM_ALWAYS_VALID |
302 		      AMDGPU_GEM_CREATE_EXPLICIT_SYNC |
303 		      AMDGPU_GEM_CREATE_ENCRYPTED |
304 		      AMDGPU_GEM_CREATE_DISCARDABLE))
305 		return -EINVAL;
306 
307 	/* reject invalid gem domains */
308 	if (args->in.domains & ~AMDGPU_GEM_DOMAIN_MASK)
309 		return -EINVAL;
310 
311 	if (!amdgpu_is_tmz(adev) && (flags & AMDGPU_GEM_CREATE_ENCRYPTED)) {
312 		DRM_NOTE_ONCE("Cannot allocate secure buffer since TMZ is disabled\n");
313 		return -EINVAL;
314 	}
315 
316 	/* create a gem object to contain this object in */
317 	if (args->in.domains & (AMDGPU_GEM_DOMAIN_GDS |
318 	    AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
319 		if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
320 			/* if gds bo is created from user space, it must be
321 			 * passed to bo list
322 			 */
323 			DRM_ERROR("GDS bo cannot be per-vm-bo\n");
324 			return -EINVAL;
325 		}
326 		flags |= AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
327 	}
328 
329 	if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
330 		r = amdgpu_bo_reserve(vm->root.bo, false);
331 		if (r)
332 			return r;
333 
334 		resv = vm->root.bo->tbo.base.resv;
335 	}
336 
337 	initial_domain = (u32)(0xffffffff & args->in.domains);
338 retry:
339 	r = amdgpu_gem_object_create(adev, size, args->in.alignment,
340 				     initial_domain,
341 				     flags, ttm_bo_type_device, resv, &gobj, fpriv->xcp_id + 1);
342 	if (r && r != -ERESTARTSYS) {
343 		if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) {
344 			flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
345 			goto retry;
346 		}
347 
348 		if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
349 			initial_domain |= AMDGPU_GEM_DOMAIN_GTT;
350 			goto retry;
351 		}
352 		DRM_DEBUG("Failed to allocate GEM object (%llu, %d, %llu, %d)\n",
353 				size, initial_domain, args->in.alignment, r);
354 	}
355 
356 	if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
357 		if (!r) {
358 			struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
359 
360 			abo->parent = amdgpu_bo_ref(vm->root.bo);
361 		}
362 		amdgpu_bo_unreserve(vm->root.bo);
363 	}
364 	if (r)
365 		return r;
366 
367 	r = drm_gem_handle_create(filp, gobj, &handle);
368 	/* drop reference from allocate - handle holds it now */
369 	drm_gem_object_put(gobj);
370 	if (r)
371 		return r;
372 
373 	memset(args, 0, sizeof(*args));
374 	args->out.handle = handle;
375 	return 0;
376 }
377 
378 int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
379 			     struct drm_file *filp)
380 {
381 	struct ttm_operation_ctx ctx = { true, false };
382 	struct amdgpu_device *adev = drm_to_adev(dev);
383 	struct drm_amdgpu_gem_userptr *args = data;
384 	struct amdgpu_fpriv *fpriv = filp->driver_priv;
385 	struct drm_gem_object *gobj;
386 	struct hmm_range *range;
387 	struct amdgpu_bo *bo;
388 	uint32_t handle;
389 	int r;
390 
391 	args->addr = untagged_addr(args->addr);
392 
393 	if (offset_in_page(args->addr | args->size))
394 		return -EINVAL;
395 
396 	/* reject unknown flag values */
397 	if (args->flags & ~(AMDGPU_GEM_USERPTR_READONLY |
398 	    AMDGPU_GEM_USERPTR_ANONONLY | AMDGPU_GEM_USERPTR_VALIDATE |
399 	    AMDGPU_GEM_USERPTR_REGISTER))
400 		return -EINVAL;
401 
402 	if (!(args->flags & AMDGPU_GEM_USERPTR_READONLY) &&
403 	     !(args->flags & AMDGPU_GEM_USERPTR_REGISTER)) {
404 
405 		/* if we want to write to it we must install a MMU notifier */
406 		return -EACCES;
407 	}
408 
409 	/* create a gem object to contain this object in */
410 	r = amdgpu_gem_object_create(adev, args->size, 0, AMDGPU_GEM_DOMAIN_CPU,
411 				     0, ttm_bo_type_device, NULL, &gobj, fpriv->xcp_id + 1);
412 	if (r)
413 		return r;
414 
415 	bo = gem_to_amdgpu_bo(gobj);
416 	bo->preferred_domains = AMDGPU_GEM_DOMAIN_GTT;
417 	bo->allowed_domains = AMDGPU_GEM_DOMAIN_GTT;
418 	r = amdgpu_ttm_tt_set_userptr(&bo->tbo, args->addr, args->flags);
419 	if (r)
420 		goto release_object;
421 
422 	r = amdgpu_hmm_register(bo, args->addr);
423 	if (r)
424 		goto release_object;
425 
426 	if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) {
427 		r = amdgpu_ttm_tt_get_user_pages(bo, bo->tbo.ttm->pages,
428 						 &range);
429 		if (r)
430 			goto release_object;
431 
432 		r = amdgpu_bo_reserve(bo, true);
433 		if (r)
434 			goto user_pages_done;
435 
436 		amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT);
437 		r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
438 		amdgpu_bo_unreserve(bo);
439 		if (r)
440 			goto user_pages_done;
441 	}
442 
443 	r = drm_gem_handle_create(filp, gobj, &handle);
444 	if (r)
445 		goto user_pages_done;
446 
447 	args->handle = handle;
448 
449 user_pages_done:
450 	if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE)
451 		amdgpu_ttm_tt_get_user_pages_done(bo->tbo.ttm, range);
452 
453 release_object:
454 	drm_gem_object_put(gobj);
455 
456 	return r;
457 }
458 
459 int amdgpu_mode_dumb_mmap(struct drm_file *filp,
460 			  struct drm_device *dev,
461 			  uint32_t handle, uint64_t *offset_p)
462 {
463 	struct drm_gem_object *gobj;
464 	struct amdgpu_bo *robj;
465 
466 	gobj = drm_gem_object_lookup(filp, handle);
467 	if (!gobj)
468 		return -ENOENT;
469 
470 	robj = gem_to_amdgpu_bo(gobj);
471 	if (amdgpu_ttm_tt_get_usermm(robj->tbo.ttm) ||
472 	    (robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
473 		drm_gem_object_put(gobj);
474 		return -EPERM;
475 	}
476 	*offset_p = amdgpu_bo_mmap_offset(robj);
477 	drm_gem_object_put(gobj);
478 	return 0;
479 }
480 
481 int amdgpu_gem_mmap_ioctl(struct drm_device *dev, void *data,
482 			  struct drm_file *filp)
483 {
484 	union drm_amdgpu_gem_mmap *args = data;
485 	uint32_t handle = args->in.handle;
486 
487 	memset(args, 0, sizeof(*args));
488 	return amdgpu_mode_dumb_mmap(filp, dev, handle, &args->out.addr_ptr);
489 }
490 
491 /**
492  * amdgpu_gem_timeout - calculate jiffies timeout from absolute value
493  *
494  * @timeout_ns: timeout in ns
495  *
496  * Calculate the timeout in jiffies from an absolute timeout in ns.
497  */
498 unsigned long amdgpu_gem_timeout(uint64_t timeout_ns)
499 {
500 	unsigned long timeout_jiffies;
501 	ktime_t timeout;
502 
503 	/* clamp timeout if it's to large */
504 	if (((int64_t)timeout_ns) < 0)
505 		return MAX_SCHEDULE_TIMEOUT;
506 
507 	timeout = ktime_sub(ns_to_ktime(timeout_ns), ktime_get());
508 	if (ktime_to_ns(timeout) < 0)
509 		return 0;
510 
511 	timeout_jiffies = nsecs_to_jiffies(ktime_to_ns(timeout));
512 	/*  clamp timeout to avoid unsigned-> signed overflow */
513 	if (timeout_jiffies > MAX_SCHEDULE_TIMEOUT)
514 		return MAX_SCHEDULE_TIMEOUT - 1;
515 
516 	return timeout_jiffies;
517 }
518 
519 int amdgpu_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
520 			      struct drm_file *filp)
521 {
522 	union drm_amdgpu_gem_wait_idle *args = data;
523 	struct drm_gem_object *gobj;
524 	struct amdgpu_bo *robj;
525 	uint32_t handle = args->in.handle;
526 	unsigned long timeout = amdgpu_gem_timeout(args->in.timeout);
527 	int r = 0;
528 	long ret;
529 
530 	gobj = drm_gem_object_lookup(filp, handle);
531 	if (!gobj)
532 		return -ENOENT;
533 
534 	robj = gem_to_amdgpu_bo(gobj);
535 	ret = dma_resv_wait_timeout(robj->tbo.base.resv, DMA_RESV_USAGE_READ,
536 				    true, timeout);
537 
538 	/* ret == 0 means not signaled,
539 	 * ret > 0 means signaled
540 	 * ret < 0 means interrupted before timeout
541 	 */
542 	if (ret >= 0) {
543 		memset(args, 0, sizeof(*args));
544 		args->out.status = (ret == 0);
545 	} else
546 		r = ret;
547 
548 	drm_gem_object_put(gobj);
549 	return r;
550 }
551 
552 int amdgpu_gem_metadata_ioctl(struct drm_device *dev, void *data,
553 				struct drm_file *filp)
554 {
555 	struct drm_amdgpu_gem_metadata *args = data;
556 	struct drm_gem_object *gobj;
557 	struct amdgpu_bo *robj;
558 	int r = -1;
559 
560 	DRM_DEBUG("%d\n", args->handle);
561 	gobj = drm_gem_object_lookup(filp, args->handle);
562 	if (gobj == NULL)
563 		return -ENOENT;
564 	robj = gem_to_amdgpu_bo(gobj);
565 
566 	r = amdgpu_bo_reserve(robj, false);
567 	if (unlikely(r != 0))
568 		goto out;
569 
570 	if (args->op == AMDGPU_GEM_METADATA_OP_GET_METADATA) {
571 		amdgpu_bo_get_tiling_flags(robj, &args->data.tiling_info);
572 		r = amdgpu_bo_get_metadata(robj, args->data.data,
573 					   sizeof(args->data.data),
574 					   &args->data.data_size_bytes,
575 					   &args->data.flags);
576 	} else if (args->op == AMDGPU_GEM_METADATA_OP_SET_METADATA) {
577 		if (args->data.data_size_bytes > sizeof(args->data.data)) {
578 			r = -EINVAL;
579 			goto unreserve;
580 		}
581 		r = amdgpu_bo_set_tiling_flags(robj, args->data.tiling_info);
582 		if (!r)
583 			r = amdgpu_bo_set_metadata(robj, args->data.data,
584 						   args->data.data_size_bytes,
585 						   args->data.flags);
586 	}
587 
588 unreserve:
589 	amdgpu_bo_unreserve(robj);
590 out:
591 	drm_gem_object_put(gobj);
592 	return r;
593 }
594 
595 /**
596  * amdgpu_gem_va_update_vm -update the bo_va in its VM
597  *
598  * @adev: amdgpu_device pointer
599  * @vm: vm to update
600  * @bo_va: bo_va to update
601  * @operation: map, unmap or clear
602  *
603  * Update the bo_va directly after setting its address. Errors are not
604  * vital here, so they are not reported back to userspace.
605  */
606 static void amdgpu_gem_va_update_vm(struct amdgpu_device *adev,
607 				    struct amdgpu_vm *vm,
608 				    struct amdgpu_bo_va *bo_va,
609 				    uint32_t operation)
610 {
611 	int r;
612 
613 	if (!amdgpu_vm_ready(vm))
614 		return;
615 
616 	r = amdgpu_vm_clear_freed(adev, vm, NULL);
617 	if (r)
618 		goto error;
619 
620 	if (operation == AMDGPU_VA_OP_MAP ||
621 	    operation == AMDGPU_VA_OP_REPLACE) {
622 		r = amdgpu_vm_bo_update(adev, bo_va, false);
623 		if (r)
624 			goto error;
625 	}
626 
627 	r = amdgpu_vm_update_pdes(adev, vm, false);
628 
629 error:
630 	if (r && r != -ERESTARTSYS)
631 		DRM_ERROR("Couldn't update BO_VA (%d)\n", r);
632 }
633 
634 /**
635  * amdgpu_gem_va_map_flags - map GEM UAPI flags into hardware flags
636  *
637  * @adev: amdgpu_device pointer
638  * @flags: GEM UAPI flags
639  *
640  * Returns the GEM UAPI flags mapped into hardware for the ASIC.
641  */
642 uint64_t amdgpu_gem_va_map_flags(struct amdgpu_device *adev, uint32_t flags)
643 {
644 	uint64_t pte_flag = 0;
645 
646 	if (flags & AMDGPU_VM_PAGE_EXECUTABLE)
647 		pte_flag |= AMDGPU_PTE_EXECUTABLE;
648 	if (flags & AMDGPU_VM_PAGE_READABLE)
649 		pte_flag |= AMDGPU_PTE_READABLE;
650 	if (flags & AMDGPU_VM_PAGE_WRITEABLE)
651 		pte_flag |= AMDGPU_PTE_WRITEABLE;
652 	if (flags & AMDGPU_VM_PAGE_PRT)
653 		pte_flag |= AMDGPU_PTE_PRT;
654 	if (flags & AMDGPU_VM_PAGE_NOALLOC)
655 		pte_flag |= AMDGPU_PTE_NOALLOC;
656 
657 	if (adev->gmc.gmc_funcs->map_mtype)
658 		pte_flag |= amdgpu_gmc_map_mtype(adev,
659 						 flags & AMDGPU_VM_MTYPE_MASK);
660 
661 	return pte_flag;
662 }
663 
664 int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data,
665 			  struct drm_file *filp)
666 {
667 	const uint32_t valid_flags = AMDGPU_VM_DELAY_UPDATE |
668 		AMDGPU_VM_PAGE_READABLE | AMDGPU_VM_PAGE_WRITEABLE |
669 		AMDGPU_VM_PAGE_EXECUTABLE | AMDGPU_VM_MTYPE_MASK |
670 		AMDGPU_VM_PAGE_NOALLOC;
671 	const uint32_t prt_flags = AMDGPU_VM_DELAY_UPDATE |
672 		AMDGPU_VM_PAGE_PRT;
673 
674 	struct drm_amdgpu_gem_va *args = data;
675 	struct drm_gem_object *gobj;
676 	struct amdgpu_device *adev = drm_to_adev(dev);
677 	struct amdgpu_fpriv *fpriv = filp->driver_priv;
678 	struct amdgpu_bo *abo;
679 	struct amdgpu_bo_va *bo_va;
680 	struct drm_exec exec;
681 	uint64_t va_flags;
682 	uint64_t vm_size;
683 	int r = 0;
684 
685 	if (args->va_address < AMDGPU_VA_RESERVED_SIZE) {
686 		dev_dbg(dev->dev,
687 			"va_address 0x%llx is in reserved area 0x%llx\n",
688 			args->va_address, AMDGPU_VA_RESERVED_SIZE);
689 		return -EINVAL;
690 	}
691 
692 	if (args->va_address >= AMDGPU_GMC_HOLE_START &&
693 	    args->va_address < AMDGPU_GMC_HOLE_END) {
694 		dev_dbg(dev->dev,
695 			"va_address 0x%llx is in VA hole 0x%llx-0x%llx\n",
696 			args->va_address, AMDGPU_GMC_HOLE_START,
697 			AMDGPU_GMC_HOLE_END);
698 		return -EINVAL;
699 	}
700 
701 	args->va_address &= AMDGPU_GMC_HOLE_MASK;
702 
703 	vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
704 	vm_size -= AMDGPU_VA_RESERVED_SIZE;
705 	if (args->va_address + args->map_size > vm_size) {
706 		dev_dbg(dev->dev,
707 			"va_address 0x%llx is in top reserved area 0x%llx\n",
708 			args->va_address + args->map_size, vm_size);
709 		return -EINVAL;
710 	}
711 
712 	if ((args->flags & ~valid_flags) && (args->flags & ~prt_flags)) {
713 		dev_dbg(dev->dev, "invalid flags combination 0x%08X\n",
714 			args->flags);
715 		return -EINVAL;
716 	}
717 
718 	switch (args->operation) {
719 	case AMDGPU_VA_OP_MAP:
720 	case AMDGPU_VA_OP_UNMAP:
721 	case AMDGPU_VA_OP_CLEAR:
722 	case AMDGPU_VA_OP_REPLACE:
723 		break;
724 	default:
725 		dev_dbg(dev->dev, "unsupported operation %d\n",
726 			args->operation);
727 		return -EINVAL;
728 	}
729 
730 	if ((args->operation != AMDGPU_VA_OP_CLEAR) &&
731 	    !(args->flags & AMDGPU_VM_PAGE_PRT)) {
732 		gobj = drm_gem_object_lookup(filp, args->handle);
733 		if (gobj == NULL)
734 			return -ENOENT;
735 		abo = gem_to_amdgpu_bo(gobj);
736 	} else {
737 		gobj = NULL;
738 		abo = NULL;
739 	}
740 
741 	drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT |
742 		      DRM_EXEC_IGNORE_DUPLICATES);
743 	drm_exec_until_all_locked(&exec) {
744 		if (gobj) {
745 			r = drm_exec_lock_obj(&exec, gobj);
746 			drm_exec_retry_on_contention(&exec);
747 			if (unlikely(r))
748 				goto error;
749 		}
750 
751 		r = amdgpu_vm_lock_pd(&fpriv->vm, &exec, 2);
752 		drm_exec_retry_on_contention(&exec);
753 		if (unlikely(r))
754 			goto error;
755 	}
756 
757 	if (abo) {
758 		bo_va = amdgpu_vm_bo_find(&fpriv->vm, abo);
759 		if (!bo_va) {
760 			r = -ENOENT;
761 			goto error;
762 		}
763 	} else if (args->operation != AMDGPU_VA_OP_CLEAR) {
764 		bo_va = fpriv->prt_va;
765 	} else {
766 		bo_va = NULL;
767 	}
768 
769 	switch (args->operation) {
770 	case AMDGPU_VA_OP_MAP:
771 		va_flags = amdgpu_gem_va_map_flags(adev, args->flags);
772 		r = amdgpu_vm_bo_map(adev, bo_va, args->va_address,
773 				     args->offset_in_bo, args->map_size,
774 				     va_flags);
775 		break;
776 	case AMDGPU_VA_OP_UNMAP:
777 		r = amdgpu_vm_bo_unmap(adev, bo_va, args->va_address);
778 		break;
779 
780 	case AMDGPU_VA_OP_CLEAR:
781 		r = amdgpu_vm_bo_clear_mappings(adev, &fpriv->vm,
782 						args->va_address,
783 						args->map_size);
784 		break;
785 	case AMDGPU_VA_OP_REPLACE:
786 		va_flags = amdgpu_gem_va_map_flags(adev, args->flags);
787 		r = amdgpu_vm_bo_replace_map(adev, bo_va, args->va_address,
788 					     args->offset_in_bo, args->map_size,
789 					     va_flags);
790 		break;
791 	default:
792 		break;
793 	}
794 	if (!r && !(args->flags & AMDGPU_VM_DELAY_UPDATE) && !amdgpu_vm_debug)
795 		amdgpu_gem_va_update_vm(adev, &fpriv->vm, bo_va,
796 					args->operation);
797 
798 error:
799 	drm_exec_fini(&exec);
800 	drm_gem_object_put(gobj);
801 	return r;
802 }
803 
804 int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data,
805 			struct drm_file *filp)
806 {
807 	struct amdgpu_device *adev = drm_to_adev(dev);
808 	struct drm_amdgpu_gem_op *args = data;
809 	struct drm_gem_object *gobj;
810 	struct amdgpu_vm_bo_base *base;
811 	struct amdgpu_bo *robj;
812 	int r;
813 
814 	gobj = drm_gem_object_lookup(filp, args->handle);
815 	if (!gobj)
816 		return -ENOENT;
817 
818 	robj = gem_to_amdgpu_bo(gobj);
819 
820 	r = amdgpu_bo_reserve(robj, false);
821 	if (unlikely(r))
822 		goto out;
823 
824 	switch (args->op) {
825 	case AMDGPU_GEM_OP_GET_GEM_CREATE_INFO: {
826 		struct drm_amdgpu_gem_create_in info;
827 		void __user *out = u64_to_user_ptr(args->value);
828 
829 		info.bo_size = robj->tbo.base.size;
830 		info.alignment = robj->tbo.page_alignment << PAGE_SHIFT;
831 		info.domains = robj->preferred_domains;
832 		info.domain_flags = robj->flags;
833 		amdgpu_bo_unreserve(robj);
834 		if (copy_to_user(out, &info, sizeof(info)))
835 			r = -EFAULT;
836 		break;
837 	}
838 	case AMDGPU_GEM_OP_SET_PLACEMENT:
839 		if (robj->tbo.base.import_attach &&
840 		    args->value & AMDGPU_GEM_DOMAIN_VRAM) {
841 			r = -EINVAL;
842 			amdgpu_bo_unreserve(robj);
843 			break;
844 		}
845 		if (amdgpu_ttm_tt_get_usermm(robj->tbo.ttm)) {
846 			r = -EPERM;
847 			amdgpu_bo_unreserve(robj);
848 			break;
849 		}
850 		for (base = robj->vm_bo; base; base = base->next)
851 			if (amdgpu_xgmi_same_hive(amdgpu_ttm_adev(robj->tbo.bdev),
852 				amdgpu_ttm_adev(base->vm->root.bo->tbo.bdev))) {
853 				r = -EINVAL;
854 				amdgpu_bo_unreserve(robj);
855 				goto out;
856 			}
857 
858 
859 		robj->preferred_domains = args->value & (AMDGPU_GEM_DOMAIN_VRAM |
860 							AMDGPU_GEM_DOMAIN_GTT |
861 							AMDGPU_GEM_DOMAIN_CPU);
862 		robj->allowed_domains = robj->preferred_domains;
863 		if (robj->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
864 			robj->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
865 
866 		if (robj->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID)
867 			amdgpu_vm_bo_invalidate(adev, robj, true);
868 
869 		amdgpu_bo_unreserve(robj);
870 		break;
871 	default:
872 		amdgpu_bo_unreserve(robj);
873 		r = -EINVAL;
874 	}
875 
876 out:
877 	drm_gem_object_put(gobj);
878 	return r;
879 }
880 
881 static int amdgpu_gem_align_pitch(struct amdgpu_device *adev,
882 				  int width,
883 				  int cpp,
884 				  bool tiled)
885 {
886 	int aligned = width;
887 	int pitch_mask = 0;
888 
889 	switch (cpp) {
890 	case 1:
891 		pitch_mask = 255;
892 		break;
893 	case 2:
894 		pitch_mask = 127;
895 		break;
896 	case 3:
897 	case 4:
898 		pitch_mask = 63;
899 		break;
900 	}
901 
902 	aligned += pitch_mask;
903 	aligned &= ~pitch_mask;
904 	return aligned * cpp;
905 }
906 
907 int amdgpu_mode_dumb_create(struct drm_file *file_priv,
908 			    struct drm_device *dev,
909 			    struct drm_mode_create_dumb *args)
910 {
911 	struct amdgpu_device *adev = drm_to_adev(dev);
912 	struct amdgpu_fpriv *fpriv = file_priv->driver_priv;
913 	struct drm_gem_object *gobj;
914 	uint32_t handle;
915 	u64 flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
916 		    AMDGPU_GEM_CREATE_CPU_GTT_USWC |
917 		    AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
918 	u32 domain;
919 	int r;
920 
921 	/*
922 	 * The buffer returned from this function should be cleared, but
923 	 * it can only be done if the ring is enabled or we'll fail to
924 	 * create the buffer.
925 	 */
926 	if (adev->mman.buffer_funcs_enabled)
927 		flags |= AMDGPU_GEM_CREATE_VRAM_CLEARED;
928 
929 	args->pitch = amdgpu_gem_align_pitch(adev, args->width,
930 					     DIV_ROUND_UP(args->bpp, 8), 0);
931 	args->size = (u64)args->pitch * args->height;
932 	args->size = ALIGN(args->size, PAGE_SIZE);
933 	domain = amdgpu_bo_get_preferred_domain(adev,
934 				amdgpu_display_supported_domains(adev, flags));
935 	r = amdgpu_gem_object_create(adev, args->size, 0, domain, flags,
936 				     ttm_bo_type_device, NULL, &gobj, fpriv->xcp_id + 1);
937 	if (r)
938 		return -ENOMEM;
939 
940 	r = drm_gem_handle_create(file_priv, gobj, &handle);
941 	/* drop reference from allocate - handle holds it now */
942 	drm_gem_object_put(gobj);
943 	if (r)
944 		return r;
945 
946 	args->handle = handle;
947 	return 0;
948 }
949 
950 #if defined(CONFIG_DEBUG_FS)
951 static int amdgpu_debugfs_gem_info_show(struct seq_file *m, void *unused)
952 {
953 	struct amdgpu_device *adev = m->private;
954 	struct drm_device *dev = adev_to_drm(adev);
955 	struct drm_file *file;
956 	int r;
957 
958 	r = mutex_lock_interruptible(&dev->filelist_mutex);
959 	if (r)
960 		return r;
961 
962 	list_for_each_entry(file, &dev->filelist, lhead) {
963 		struct task_struct *task;
964 		struct drm_gem_object *gobj;
965 		int id;
966 
967 		/*
968 		 * Although we have a valid reference on file->pid, that does
969 		 * not guarantee that the task_struct who called get_pid() is
970 		 * still alive (e.g. get_pid(current) => fork() => exit()).
971 		 * Therefore, we need to protect this ->comm access using RCU.
972 		 */
973 		rcu_read_lock();
974 		task = pid_task(file->pid, PIDTYPE_TGID);
975 		seq_printf(m, "pid %8d command %s:\n", pid_nr(file->pid),
976 			   task ? task->comm : "<unknown>");
977 		rcu_read_unlock();
978 
979 		spin_lock(&file->table_lock);
980 		idr_for_each_entry(&file->object_idr, gobj, id) {
981 			struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
982 
983 			amdgpu_bo_print_info(id, bo, m);
984 		}
985 		spin_unlock(&file->table_lock);
986 	}
987 
988 	mutex_unlock(&dev->filelist_mutex);
989 	return 0;
990 }
991 
992 DEFINE_SHOW_ATTRIBUTE(amdgpu_debugfs_gem_info);
993 
994 #endif
995 
996 void amdgpu_debugfs_gem_init(struct amdgpu_device *adev)
997 {
998 #if defined(CONFIG_DEBUG_FS)
999 	struct drm_minor *minor = adev_to_drm(adev)->primary;
1000 	struct dentry *root = minor->debugfs_root;
1001 
1002 	debugfs_create_file("amdgpu_gem_info", 0444, root, adev,
1003 			    &amdgpu_debugfs_gem_info_fops);
1004 #endif
1005 }
1006