summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/qxl/qxl_ttm.c
blob: 9b24514c75aad35e871cd03aa95c8ee5a4b39215 (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
/*
 * Copyright 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Dave Airlie
 *          Alon Levy
 */

#include <linux/delay.h>

#include <drm/drm.h>
#include <drm/drm_file.h>
#include <drm/drm_debugfs.h>
#include <drm/qxl_drm.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_page_alloc.h>
#include <drm/ttm/ttm_placement.h>

#include "qxl_drv.h"
#include "qxl_object.h"

static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
{
	struct qxl_mman *mman;
	struct qxl_device *qdev;

	mman = container_of(bdev, struct qxl_mman, bdev);
	qdev = container_of(mman, struct qxl_device, mman);
	return qdev;
}

static struct vm_operations_struct qxl_ttm_vm_ops;
static const struct vm_operations_struct *ttm_vm_ops;

static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf)
{
	struct ttm_buffer_object *bo;
	vm_fault_t ret;

	bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
	if (bo == NULL)
		return VM_FAULT_NOPAGE;
	ret = ttm_vm_ops->fault(vmf);
	return ret;
}

int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
{
	int r;
	struct drm_file *file_priv = filp->private_data;
	struct qxl_device *qdev = file_priv->minor->dev->dev_private;

	if (qdev == NULL) {
		DRM_ERROR(
		 "filp->private_data->minor->dev->dev_private == NULL\n");
		return -EINVAL;
	}
	DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
		  filp->private_data, vma->vm_pgoff);

	r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
	if (unlikely(r != 0))
		return r;
	if (unlikely(ttm_vm_ops == NULL)) {
		ttm_vm_ops = vma->vm_ops;
		qxl_ttm_vm_ops = *ttm_vm_ops;
		qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
	}
	vma->vm_ops = &qxl_ttm_vm_ops;
	return 0;
}

static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
{
	return 0;
}

static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
			     struct ttm_mem_type_manager *man)
{
	struct qxl_device *qdev = qxl_get_qdev(bdev);
	unsigned int gpu_offset_shift =
		64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8);
	struct qxl_memslot *slot;

	switch (type) {
	case TTM_PL_SYSTEM:
		/* System memory */
		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_MASK_CACHING;
		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	case TTM_PL_VRAM:
	case TTM_PL_PRIV:
		/* "On-card" video ram */
		slot = (type == TTM_PL_VRAM) ?
			&qdev->main_slot : &qdev->surfaces_slot;
		slot->gpu_offset = (uint64_t)type << gpu_offset_shift;
		man->func = &ttm_bo_manager_func;
		man->gpu_offset = slot->gpu_offset;
		man->flags = TTM_MEMTYPE_FLAG_FIXED |
			     TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_MASK_CACHING;
		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	default:
		DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
		return -EINVAL;
	}
	return 0;
}

static void qxl_evict_flags(struct ttm_buffer_object *bo,
				struct ttm_placement *placement)
{
	struct qxl_bo *qbo;
	static const struct ttm_place placements = {
		.fpfn = 0,
		.lpfn = 0,
		.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
	};

	if (!qxl_ttm_bo_is_qxl_bo(bo)) {
		placement->placement = &placements;
		placement->busy_placement = &placements;
		placement->num_placement = 1;
		placement->num_busy_placement = 1;
		return;
	}
	qbo = to_qxl_bo(bo);
	qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
	*placement = qbo->placement;
}

static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
	struct qxl_bo *qbo = to_qxl_bo(bo);

	return drm_vma_node_verify_access(&qbo->tbo.base.vma_node,
					  filp->private_data);
}

static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
				  struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	struct qxl_device *qdev = qxl_get_qdev(bdev);

	mem->bus.addr = NULL;
	mem->bus.offset = 0;
	mem->bus.size = mem->num_pages << PAGE_SHIFT;
	mem->bus.base = 0;
	mem->bus.is_iomem = false;
	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
		return -EINVAL;
	switch (mem->mem_type) {
	case TTM_PL_SYSTEM:
		/* system memory */
		return 0;
	case TTM_PL_VRAM:
		mem->bus.is_iomem = true;
		mem->bus.base = qdev->vram_base;
		mem->bus.offset = mem->start << PAGE_SHIFT;
		break;
	case TTM_PL_PRIV:
		mem->bus.is_iomem = true;
		mem->bus.base = qdev->surfaceram_base;
		mem->bus.offset = mem->start << PAGE_SHIFT;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
				struct ttm_mem_reg *mem)
{
}

/*
 * TTM backend functions.
 */
struct qxl_ttm_tt {
	struct ttm_tt		        ttm;
	struct qxl_device		*qdev;
	u64				offset;
};

static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
				struct ttm_mem_reg *bo_mem)
{
	struct qxl_ttm_tt *gtt = (void *)ttm;

	gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
	if (!ttm->num_pages) {
		WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
		     ttm->num_pages, bo_mem, ttm);
	}
	/* Not implemented */
	return -1;
}

static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
{
	/* Not implemented */
	return -1;
}

static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
{
	struct qxl_ttm_tt *gtt = (void *)ttm;

	ttm_tt_fini(&gtt->ttm);
	kfree(gtt);
}

static struct ttm_backend_func qxl_backend_func = {
	.bind = &qxl_ttm_backend_bind,
	.unbind = &qxl_ttm_backend_unbind,
	.destroy = &qxl_ttm_backend_destroy,
};

static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
					uint32_t page_flags)
{
	struct qxl_device *qdev;
	struct qxl_ttm_tt *gtt;

	qdev = qxl_get_qdev(bo->bdev);
	gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
	if (gtt == NULL)
		return NULL;
	gtt->ttm.func = &qxl_backend_func;
	gtt->qdev = qdev;
	if (ttm_tt_init(&gtt->ttm, bo, page_flags)) {
		kfree(gtt);
		return NULL;
	}
	return &gtt->ttm;
}

static void qxl_move_null(struct ttm_buffer_object *bo,
			     struct ttm_mem_reg *new_mem)
{
	struct ttm_mem_reg *old_mem = &bo->mem;

	BUG_ON(old_mem->mm_node != NULL);
	*old_mem = *new_mem;
	new_mem->mm_node = NULL;
}

static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
		       struct ttm_operation_ctx *ctx,
		       struct ttm_mem_reg *new_mem)
{
	struct ttm_mem_reg *old_mem = &bo->mem;
	int ret;

	ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
	if (ret)
		return ret;

	if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
		qxl_move_null(bo, new_mem);
		return 0;
	}
	return ttm_bo_move_memcpy(bo, ctx, new_mem);
}

static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
			       bool evict,
			       struct ttm_mem_reg *new_mem)
{
	struct qxl_bo *qbo;
	struct qxl_device *qdev;

	if (!qxl_ttm_bo_is_qxl_bo(bo))
		return;
	qbo = to_qxl_bo(bo);
	qdev = qbo->tbo.base.dev->dev_private;

	if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
		qxl_surface_evict(qdev, qbo, new_mem ? true : false);
}

static struct ttm_bo_driver qxl_bo_driver = {
	.ttm_tt_create = &qxl_ttm_tt_create,
	.invalidate_caches = &qxl_invalidate_caches,
	.init_mem_type = &qxl_init_mem_type,
	.eviction_valuable = ttm_bo_eviction_valuable,
	.evict_flags = &qxl_evict_flags,
	.move = &qxl_bo_move,
	.verify_access = &qxl_verify_access,
	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
	.io_mem_free = &qxl_ttm_io_mem_free,
	.move_notify = &qxl_bo_move_notify,
};

int qxl_ttm_init(struct qxl_device *qdev)
{
	int r;
	int num_io_pages; /* != rom->num_io_pages, we include surface0 */

	/* No others user of address space so set it to 0 */
	r = ttm_bo_device_init(&qdev->mman.bdev,
			       &qxl_bo_driver,
			       qdev->ddev.anon_inode->i_mapping,
			       false);
	if (r) {
		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
		return r;
	}
	/* NOTE: this includes the framebuffer (aka surface 0) */
	num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
	r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
			   num_io_pages);
	if (r) {
		DRM_ERROR("Failed initializing VRAM heap.\n");
		return r;
	}
	r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV,
			   qdev->surfaceram_size / PAGE_SIZE);
	if (r) {
		DRM_ERROR("Failed initializing Surfaces heap.\n");
		return r;
	}
	DRM_INFO("qxl: %uM of VRAM memory size\n",
		 (unsigned int)qdev->vram_size / (1024 * 1024));
	DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
		 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
	DRM_INFO("qxl: %uM of Surface memory size\n",
		 (unsigned int)qdev->surfaceram_size / (1024 * 1024));
	return 0;
}

void qxl_ttm_fini(struct qxl_device *qdev)
{
	ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
	ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV);
	ttm_bo_device_release(&qdev->mman.bdev);
	DRM_INFO("qxl: ttm finalized\n");
}

#define QXL_DEBUGFS_MEM_TYPES 2

#if defined(CONFIG_DEBUG_FS)
static int qxl_mm_dump_table(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *)m->private;
	struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
	struct drm_device *dev = node->minor->dev;
	struct qxl_device *rdev = dev->dev_private;
	struct ttm_bo_global *glob = rdev->mman.bdev.glob;
	struct drm_printer p = drm_seq_file_printer(m);

	spin_lock(&glob->lru_lock);
	drm_mm_print(mm, &p);
	spin_unlock(&glob->lru_lock);
	return 0;
}
#endif

int qxl_ttm_debugfs_init(struct qxl_device *qdev)
{
#if defined(CONFIG_DEBUG_FS)
	static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
	static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
	unsigned int i;

	for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
		if (i == 0)
			sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
		else
			sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
		qxl_mem_types_list[i].name = qxl_mem_types_names[i];
		qxl_mem_types_list[i].show = &qxl_mm_dump_table;
		qxl_mem_types_list[i].driver_features = 0;
		if (i == 0)
			qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
		else
			qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv;

	}
	return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
#else
	return 0;
#endif
}