summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/vmwgfx/vmwgfx_gem.c
blob: 4d2c28e39f4e099dd6a83d74bdbb7366fc9fd174 (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
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
 * Copyright 2021 VMware, 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 AUTHORS OR COPYRIGHT HOLDERS
 * 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.
 *
 */

#include "vmwgfx_drv.h"

#include "drm/drm_prime.h"
#include "drm/drm_gem_ttm_helper.h"

/**
 * vmw_buffer_object - Convert a struct ttm_buffer_object to a struct
 * vmw_buffer_object.
 *
 * @bo: Pointer to the TTM buffer object.
 * Return: Pointer to the struct vmw_buffer_object embedding the
 * TTM buffer object.
 */
static struct vmw_buffer_object *
vmw_buffer_object(struct ttm_buffer_object *bo)
{
	return container_of(bo, struct vmw_buffer_object, base);
}

static void vmw_gem_object_free(struct drm_gem_object *gobj)
{
	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gobj);
	if (bo) {
		ttm_bo_put(bo);
	}
}

static int vmw_gem_object_open(struct drm_gem_object *obj,
			       struct drm_file *file_priv)
{
	return 0;
}

static void vmw_gem_object_close(struct drm_gem_object *obj,
				 struct drm_file *file_priv)
{
}

static int vmw_gem_pin_private(struct drm_gem_object *obj, bool do_pin)
{
	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
	struct vmw_buffer_object *vbo = vmw_buffer_object(bo);
	int ret;

	ret = ttm_bo_reserve(bo, false, false, NULL);
	if (unlikely(ret != 0))
		goto err;

	vmw_bo_pin_reserved(vbo, do_pin);

	ttm_bo_unreserve(bo);

err:
	return ret;
}


static int vmw_gem_object_pin(struct drm_gem_object *obj)
{
	return vmw_gem_pin_private(obj, true);
}

static void vmw_gem_object_unpin(struct drm_gem_object *obj)
{
	vmw_gem_pin_private(obj, false);
}

static struct sg_table *vmw_gem_object_get_sg_table(struct drm_gem_object *obj)
{
	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
	struct vmw_ttm_tt *vmw_tt =
		container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);

	if (vmw_tt->vsgt.sgt)
		return vmw_tt->vsgt.sgt;

	return drm_prime_pages_to_sg(obj->dev, vmw_tt->dma_ttm.pages, vmw_tt->dma_ttm.num_pages);
}


static const struct drm_gem_object_funcs vmw_gem_object_funcs = {
	.free = vmw_gem_object_free,
	.open = vmw_gem_object_open,
	.close = vmw_gem_object_close,
	.print_info = drm_gem_ttm_print_info,
	.pin = vmw_gem_object_pin,
	.unpin = vmw_gem_object_unpin,
	.get_sg_table = vmw_gem_object_get_sg_table,
	.vmap = drm_gem_ttm_vmap,
	.vunmap = drm_gem_ttm_vunmap,
	.mmap = drm_gem_ttm_mmap,
};

/**
 * vmw_gem_destroy - vmw buffer object destructor
 *
 * @bo: Pointer to the embedded struct ttm_buffer_object
 */
void vmw_gem_destroy(struct ttm_buffer_object *bo)
{
	struct vmw_buffer_object *vbo = vmw_buffer_object(bo);

	WARN_ON(vbo->dirty);
	WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree));
	vmw_bo_unmap(vbo);
	drm_gem_object_release(&vbo->base.base);
	kfree(vbo);
}

int vmw_gem_object_create_with_handle(struct vmw_private *dev_priv,
				      struct drm_file *filp,
				      uint32_t size,
				      uint32_t *handle,
				      struct vmw_buffer_object **p_vbo)
{
	int ret;

	ret = vmw_bo_create(dev_priv, size,
			    (dev_priv->has_mob) ?
				    &vmw_sys_placement :
				    &vmw_vram_sys_placement,
			    true, false, &vmw_gem_destroy, p_vbo);
	if (ret != 0)
		goto out_no_bo;

	(*p_vbo)->base.base.funcs = &vmw_gem_object_funcs;

	ret = drm_gem_handle_create(filp, &(*p_vbo)->base.base, handle);
out_no_bo:
	return ret;
}


int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data,
				struct drm_file *filp)
{
	struct vmw_private *dev_priv = vmw_priv(dev);
	union drm_vmw_alloc_dmabuf_arg *arg =
	    (union drm_vmw_alloc_dmabuf_arg *)data;
	struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
	struct drm_vmw_dmabuf_rep *rep = &arg->rep;
	struct vmw_buffer_object *vbo;
	uint32_t handle;
	int ret;

	ret = vmw_gem_object_create_with_handle(dev_priv, filp,
						req->size, &handle, &vbo);
	if (ret)
		goto out_no_bo;

	rep->handle = handle;
	rep->map_handle = drm_vma_node_offset_addr(&vbo->base.base.vma_node);
	rep->cur_gmr_id = handle;
	rep->cur_gmr_offset = 0;
	/* drop reference from allocate - handle holds it now */
	drm_gem_object_put(&vbo->base.base);
out_no_bo:
	return ret;
}

#if defined(CONFIG_DEBUG_FS)

static void vmw_bo_print_info(int id, struct vmw_buffer_object *bo, struct seq_file *m)
{
	const char *placement;
	const char *type;

	switch (bo->base.resource->mem_type) {
	case TTM_PL_SYSTEM:
		placement = " CPU";
		break;
	case VMW_PL_GMR:
		placement = " GMR";
		break;
	case VMW_PL_MOB:
		placement = " MOB";
		break;
	case VMW_PL_SYSTEM:
		placement = "VCPU";
		break;
	case TTM_PL_VRAM:
		placement = "VRAM";
		break;
	default:
		placement = "None";
		break;
	}

	switch (bo->base.type) {
	case ttm_bo_type_device:
		type = "device";
		break;
	case ttm_bo_type_kernel:
		type = "kernel";
		break;
	case ttm_bo_type_sg:
		type = "sg    ";
		break;
	default:
		type = "none  ";
		break;
	}

	seq_printf(m, "\t\t0x%08x: %12zu bytes %s, type = %s",
		   id, bo->base.base.size, placement, type);
	seq_printf(m, ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d",
		   bo->base.priority,
		   bo->base.pin_count,
		   kref_read(&bo->base.base.refcount),
		   kref_read(&bo->base.kref));
	seq_puts(m, "\n");
}

static int vmw_debugfs_gem_info_show(struct seq_file *m, void *unused)
{
	struct vmw_private *vdev = (struct vmw_private *)m->private;
	struct drm_device *dev = &vdev->drm;
	struct drm_file *file;
	int r;

	r = mutex_lock_interruptible(&dev->filelist_mutex);
	if (r)
		return r;

	list_for_each_entry(file, &dev->filelist, lhead) {
		struct task_struct *task;
		struct drm_gem_object *gobj;
		int id;

		/*
		 * Although we have a valid reference on file->pid, that does
		 * not guarantee that the task_struct who called get_pid() is
		 * still alive (e.g. get_pid(current) => fork() => exit()).
		 * Therefore, we need to protect this ->comm access using RCU.
		 */
		rcu_read_lock();
		task = pid_task(file->pid, PIDTYPE_PID);
		seq_printf(m, "pid %8d command %s:\n", pid_nr(file->pid),
			   task ? task->comm : "<unknown>");
		rcu_read_unlock();

		spin_lock(&file->table_lock);
		idr_for_each_entry(&file->object_idr, gobj, id) {
			struct vmw_buffer_object *bo = gem_to_vmw_bo(gobj);

			vmw_bo_print_info(id, bo, m);
		}
		spin_unlock(&file->table_lock);
	}

	mutex_unlock(&dev->filelist_mutex);
	return 0;
}

DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info);

#endif

void vmw_debugfs_gem_init(struct vmw_private *vdev)
{
#if defined(CONFIG_DEBUG_FS)
	struct drm_minor *minor = vdev->drm.primary;
	struct dentry *root = minor->debugfs_root;

	debugfs_create_file("vmwgfx_gem_info", 0444, root, vdev,
			    &vmw_debugfs_gem_info_fops);
#endif
}