summaryrefslogtreecommitdiffstats
path: root/drivers/accel/ivpu/ivpu_gem.c
blob: e9ddbe9f50ebeffaa3a1617431b864ceec73e2e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2020-2023 Intel Corporation
 */

#include <linux/dma-buf.h>
#include <linux/highmem.h>
#include <linux/module.h>
#include <linux/set_memory.h>
#include <linux/xarray.h>

#include <drm/drm_cache.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_file.h>
#include <drm/drm_utils.h>

#include "ivpu_drv.h"
#include "ivpu_gem.h"
#include "ivpu_hw.h"
#include "ivpu_mmu.h"
#include "ivpu_mmu_context.h"

static const struct drm_gem_object_funcs ivpu_gem_funcs;

static inline void ivpu_dbg_bo(struct ivpu_device *vdev, struct ivpu_bo *bo, const char *action)
{
	ivpu_dbg(vdev, BO,
		 "%6s: bo %8p vpu_addr %9llx size %8zu ctx %d has_pages %d dma_mapped %d mmu_mapped %d wc %d imported %d\n",
		 action, bo, bo->vpu_addr, ivpu_bo_size(bo), bo->ctx ? bo->ctx->id : 0,
		 (bool)bo->base.pages, (bool)bo->base.sgt, bo->mmu_mapped, bo->base.map_wc,
		 (bool)bo->base.base.import_attach);
}

/*
 * ivpu_bo_pin() - pin the backing physical pages and map them to VPU.
 *
 * This function pins physical memory pages, then maps the physical pages
 * to IOMMU address space and finally updates the VPU MMU page tables
 * to allow the VPU to translate VPU address to IOMMU address.
 */
int __must_check ivpu_bo_pin(struct ivpu_bo *bo)
{
	struct ivpu_device *vdev = ivpu_bo_to_vdev(bo);
	int ret = 0;

	mutex_lock(&bo->lock);

	ivpu_dbg_bo(vdev, bo, "pin");
	drm_WARN_ON(&vdev->drm, !bo->ctx);

	if (!bo->mmu_mapped) {
		struct sg_table *sgt = drm_gem_shmem_get_pages_sgt(&bo->base);

		if (IS_ERR(sgt)) {
			ret = PTR_ERR(sgt);
			ivpu_err(vdev, "Failed to map BO in IOMMU: %d\n", ret);
			goto unlock;
		}

		ret = ivpu_mmu_context_map_sgt(vdev, bo->ctx, bo->vpu_addr, sgt,
					       ivpu_bo_is_snooped(bo));
		if (ret) {
			ivpu_err(vdev, "Failed to map BO in MMU: %d\n", ret);
			goto unlock;
		}
		bo->mmu_mapped = true;
	}

unlock:
	mutex_unlock(&bo->lock);

	return ret;
}

static int
ivpu_bo_alloc_vpu_addr(struct ivpu_bo *bo, struct ivpu_mmu_context *ctx,
		       const struct ivpu_addr_range *range)
{
	struct ivpu_device *vdev = ivpu_bo_to_vdev(bo);
	int idx, ret;

	if (!drm_dev_enter(&vdev->drm, &idx))
		return -ENODEV;

	mutex_lock(&bo->lock);

	ret = ivpu_mmu_context_insert_node(ctx, range, ivpu_bo_size(bo), &bo->mm_node);
	if (!ret) {
		bo->ctx = ctx;
		bo->vpu_addr = bo->mm_node.start;
	} else {
		ivpu_err(vdev, "Failed to add BO to context %u: %d\n", ctx->id, ret);
	}

	ivpu_dbg_bo(vdev, bo, "alloc");

	mutex_unlock(&bo->lock);

	drm_dev_exit(idx);

	return ret;
}

static void ivpu_bo_unbind_locked(struct ivpu_bo *bo)
{
	struct ivpu_device *vdev = ivpu_bo_to_vdev(bo);

	lockdep_assert(lockdep_is_held(&bo->lock) || !kref_read(&bo->base.base.refcount));

	if (bo->mmu_mapped) {
		drm_WARN_ON(&vdev->drm, !bo->ctx);
		drm_WARN_ON(&vdev->drm, !bo->vpu_addr);
		drm_WARN_ON(&vdev->drm, !bo->base.sgt);
		ivpu_mmu_context_unmap_sgt(vdev, bo->ctx, bo->vpu_addr, bo->base.sgt);
		bo->mmu_mapped = false;
	}

	if (bo->ctx) {
		ivpu_mmu_context_remove_node(bo->ctx, &bo->mm_node);
		bo->ctx = NULL;
	}

	if (bo->base.base.import_attach)
		return;

	dma_resv_lock(bo->base.base.resv, NULL);
	if (bo->base.sgt) {
		dma_unmap_sgtable(vdev->drm.dev, bo->base.sgt, DMA_BIDIRECTIONAL, 0);
		sg_free_table(bo->base.sgt);
		kfree(bo->base.sgt);
		bo->base.sgt = NULL;
	}
	dma_resv_unlock(bo->base.base.resv);
}

void ivpu_bo_unbind_all_bos_from_context(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx)
{
	struct ivpu_bo *bo;

	if (drm_WARN_ON(&vdev->drm, !ctx))
		return;

	mutex_lock(&vdev->bo_list_lock);
	list_for_each_entry(bo, &vdev->bo_list, bo_list_node) {
		mutex_lock(&bo->lock);
		if (bo->ctx == ctx) {
			ivpu_dbg_bo(vdev, bo, "unbind");
			ivpu_bo_unbind_locked(bo);
		}
		mutex_unlock(&bo->lock);
	}
	mutex_unlock(&vdev->bo_list_lock);
}

struct drm_gem_object *ivpu_gem_create_object(struct drm_device *dev, size_t size)
{
	struct ivpu_bo *bo;

	if (size == 0 || !PAGE_ALIGNED(size))
		return ERR_PTR(-EINVAL);

	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
	if (!bo)
		return ERR_PTR(-ENOMEM);

	bo->base.base.funcs = &ivpu_gem_funcs;
	bo->base.pages_mark_dirty_on_put = true; /* VPU can dirty a BO anytime */

	INIT_LIST_HEAD(&bo->bo_list_node);
	mutex_init(&bo->lock);

	return &bo->base.base;
}

static struct ivpu_bo *
ivpu_bo_create(struct ivpu_device *vdev, u64 size, u32 flags)
{
	struct drm_gem_shmem_object *shmem;
	struct ivpu_bo *bo;

	switch (flags & DRM_IVPU_BO_CACHE_MASK) {
	case DRM_IVPU_BO_CACHED:
	case DRM_IVPU_BO_WC:
		break;
	default:
		return ERR_PTR(-EINVAL);
	}

	shmem = drm_gem_shmem_create(&vdev->drm, size);
	if (IS_ERR(shmem))
		return ERR_CAST(shmem);

	bo = to_ivpu_bo(&shmem->base);
	bo->base.map_wc = flags & DRM_IVPU_BO_WC;
	bo->flags = flags;

	mutex_lock(&vdev->bo_list_lock);
	list_add_tail(&bo->bo_list_node, &vdev->bo_list);
	mutex_unlock(&vdev->bo_list_lock);

	return bo;
}

static int ivpu_bo_open(struct drm_gem_object *obj, struct drm_file *file)
{
	struct ivpu_file_priv *file_priv = file->driver_priv;
	struct ivpu_device *vdev = file_priv->vdev;
	struct ivpu_bo *bo = to_ivpu_bo(obj);
	struct ivpu_addr_range *range;

	if (bo->ctx) {
		ivpu_warn(vdev, "Can't add BO to ctx %u: already in ctx %u\n",
			  file_priv->ctx.id, bo->ctx->id);
		return -EALREADY;
	}

	if (bo->flags & DRM_IVPU_BO_SHAVE_MEM)
		range = &vdev->hw->ranges.shave;
	else if (bo->flags & DRM_IVPU_BO_DMA_MEM)
		range = &vdev->hw->ranges.dma;
	else
		range = &vdev->hw->ranges.user;

	return ivpu_bo_alloc_vpu_addr(bo, &file_priv->ctx, range);
}

static void ivpu_bo_free(struct drm_gem_object *obj)
{
	struct ivpu_device *vdev = to_ivpu_device(obj->dev);
	struct ivpu_bo *bo = to_ivpu_bo(obj);

	ivpu_dbg_bo(vdev, bo, "free");

	mutex_lock(&vdev->bo_list_lock);
	list_del(&bo->bo_list_node);
	mutex_unlock(&vdev->bo_list_lock);

	drm_WARN_ON(&vdev->drm, !dma_resv_test_signaled(obj->resv, DMA_RESV_USAGE_READ));

	ivpu_bo_unbind_locked(bo);
	mutex_destroy(&bo->lock);

	drm_WARN_ON(obj->dev, bo->base.pages_use_count > 1);
	drm_gem_shmem_free(&bo->base);
}

static const struct drm_gem_object_funcs ivpu_gem_funcs = {
	.free = ivpu_bo_free,
	.open = ivpu_bo_open,
	.print_info = drm_gem_shmem_object_print_info,
	.pin = drm_gem_shmem_object_pin,
	.unpin = drm_gem_shmem_object_unpin,
	.get_sg_table = drm_gem_shmem_object_get_sg_table,
	.vmap = drm_gem_shmem_object_vmap,
	.vunmap = drm_gem_shmem_object_vunmap,
	.mmap = drm_gem_shmem_object_mmap,
	.vm_ops = &drm_gem_shmem_vm_ops,
};

int ivpu_bo_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
	struct ivpu_file_priv *file_priv = file->driver_priv;
	struct ivpu_device *vdev = file_priv->vdev;
	struct drm_ivpu_bo_create *args = data;
	u64 size = PAGE_ALIGN(args->size);
	struct ivpu_bo *bo;
	int ret;

	if (args->flags & ~DRM_IVPU_BO_FLAGS)
		return -EINVAL;

	if (size == 0)
		return -EINVAL;

	bo = ivpu_bo_create(vdev, size, args->flags);
	if (IS_ERR(bo)) {
		ivpu_err(vdev, "Failed to create BO: %pe (ctx %u size %llu flags 0x%x)",
			 bo, file_priv->ctx.id, args->size, args->flags);
		return PTR_ERR(bo);
	}

	ret = drm_gem_handle_create(file, &bo->base.base, &args->handle);
	if (!ret)
		args->vpu_addr = bo->vpu_addr;

	drm_gem_object_put(&bo->base.base);

	return ret;
}

struct ivpu_bo *
ivpu_bo_alloc_internal(struct ivpu_device *vdev, u64 vpu_addr, u64 size, u32 flags)
{
	const struct ivpu_addr_range *range;
	struct ivpu_addr_range fixed_range;
	struct iosys_map map;
	struct ivpu_bo *bo;
	int ret;

	drm_WARN_ON(&vdev->drm, !PAGE_ALIGNED(vpu_addr));
	drm_WARN_ON(&vdev->drm, !PAGE_ALIGNED(size));

	if (vpu_addr) {
		fixed_range.start = vpu_addr;
		fixed_range.end = vpu_addr + size;
		range = &fixed_range;
	} else {
		range = &vdev->hw->ranges.global;
	}

	bo = ivpu_bo_create(vdev, size, flags);
	if (IS_ERR(bo)) {
		ivpu_err(vdev, "Failed to create BO: %pe (vpu_addr 0x%llx size %llu flags 0x%x)",
			 bo, vpu_addr, size, flags);
		return NULL;
	}

	ret = ivpu_bo_alloc_vpu_addr(bo, &vdev->gctx, range);
	if (ret)
		goto err_put;

	ret = ivpu_bo_pin(bo);
	if (ret)
		goto err_put;

	dma_resv_lock(bo->base.base.resv, NULL);
	ret = drm_gem_shmem_vmap(&bo->base, &map);
	dma_resv_unlock(bo->base.base.resv);
	if (ret)
		goto err_put;

	return bo;

err_put:
	drm_gem_object_put(&bo->base.base);
	return NULL;
}

void ivpu_bo_free_internal(struct ivpu_bo *bo)
{
	struct iosys_map map = IOSYS_MAP_INIT_VADDR(bo->base.vaddr);

	dma_resv_lock(bo->base.base.resv, NULL);
	drm_gem_shmem_vunmap(&bo->base, &map);
	dma_resv_unlock(bo->base.base.resv);

	drm_gem_object_put(&bo->base.base);
}

int ivpu_bo_info_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
	struct drm_ivpu_bo_info *args = data;
	struct drm_gem_object *obj;
	struct ivpu_bo *bo;
	int ret = 0;

	obj = drm_gem_object_lookup(file, args->handle);
	if (!obj)
		return -ENOENT;

	bo = to_ivpu_bo(obj);

	mutex_lock(&bo->lock);
	args->flags = bo->flags;
	args->mmap_offset = drm_vma_node_offset_addr(&obj->vma_node);
	args->vpu_addr = bo->vpu_addr;
	args->size = obj->size;
	mutex_unlock(&bo->lock);

	drm_gem_object_put(obj);
	return ret;
}

int ivpu_bo_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
	struct drm_ivpu_bo_wait *args = data;
	struct drm_gem_object *obj;
	unsigned long timeout;
	long ret;

	timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);

	obj = drm_gem_object_lookup(file, args->handle);
	if (!obj)
		return -EINVAL;

	ret = dma_resv_wait_timeout(obj->resv, DMA_RESV_USAGE_READ, true, timeout);
	if (ret == 0) {
		ret = -ETIMEDOUT;
	} else if (ret > 0) {
		ret = 0;
		args->job_status = to_ivpu_bo(obj)->job_status;
	}

	drm_gem_object_put(obj);

	return ret;
}

static void ivpu_bo_print_info(struct ivpu_bo *bo, struct drm_printer *p)
{
	mutex_lock(&bo->lock);

	drm_printf(p, "%-9p %-3u 0x%-12llx %-10lu 0x%-8x %-4u",
		   bo, bo->ctx->id, bo->vpu_addr, bo->base.base.size,
		   bo->flags, kref_read(&bo->base.base.refcount));

	if (bo->base.pages)
		drm_printf(p, " has_pages");

	if (bo->mmu_mapped)
		drm_printf(p, " mmu_mapped");

	if (bo->base.base.import_attach)
		drm_printf(p, " imported");

	drm_printf(p, "\n");

	mutex_unlock(&bo->lock);
}

void ivpu_bo_list(struct drm_device *dev, struct drm_printer *p)
{
	struct ivpu_device *vdev = to_ivpu_device(dev);
	struct ivpu_bo *bo;

	drm_printf(p, "%-9s %-3s %-14s %-10s %-10s %-4s %s\n",
		   "bo", "ctx", "vpu_addr", "size", "flags", "refs", "attribs");

	mutex_lock(&vdev->bo_list_lock);
	list_for_each_entry(bo, &vdev->bo_list, bo_list_node)
		ivpu_bo_print_info(bo, p);
	mutex_unlock(&vdev->bo_list_lock);
}

void ivpu_bo_list_print(struct drm_device *dev)
{
	struct drm_printer p = drm_info_printer(dev->dev);

	ivpu_bo_list(dev, &p);
}