summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
blob: 80bc37b274e71b29c6b8c5622a020b945c915410 (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
/**************************************************************************
 *
 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
 * All Rights Reserved.
 *
 * 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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 "ttm/ttm_bo_driver.h"
#include "ttm/ttm_placement.h"

static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
	TTM_PL_FLAG_CACHED;

static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
	TTM_PL_FLAG_CACHED |
	TTM_PL_FLAG_NO_EVICT;

static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
	TTM_PL_FLAG_CACHED;

static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
	TTM_PL_FLAG_CACHED;

struct ttm_placement vmw_vram_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &vram_placement_flags
};

static uint32_t vram_gmr_placement_flags[] = {
	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
};

struct ttm_placement vmw_vram_gmr_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 2,
	.placement = vram_gmr_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &gmr_placement_flags
};

struct ttm_placement vmw_vram_sys_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
};

struct ttm_placement vmw_vram_ne_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &vram_ne_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &vram_ne_placement_flags
};

struct ttm_placement vmw_sys_placement = {
	.fpfn = 0,
	.lpfn = 0,
	.num_placement = 1,
	.placement = &sys_placement_flags,
	.num_busy_placement = 1,
	.busy_placement = &sys_placement_flags
};

struct vmw_ttm_backend {
	struct ttm_backend backend;
	struct page **pages;
	unsigned long num_pages;
	struct vmw_private *dev_priv;
	int gmr_id;
};

static int vmw_ttm_populate(struct ttm_backend *backend,
			    unsigned long num_pages, struct page **pages,
			    struct page *dummy_read_page)
{
	struct vmw_ttm_backend *vmw_be =
	    container_of(backend, struct vmw_ttm_backend, backend);

	vmw_be->pages = pages;
	vmw_be->num_pages = num_pages;

	return 0;
}

static int vmw_ttm_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
{
	struct vmw_ttm_backend *vmw_be =
	    container_of(backend, struct vmw_ttm_backend, backend);

	vmw_be->gmr_id = bo_mem->start;

	return vmw_gmr_bind(vmw_be->dev_priv, vmw_be->pages,
			    vmw_be->num_pages, vmw_be->gmr_id);
}

static int vmw_ttm_unbind(struct ttm_backend *backend)
{
	struct vmw_ttm_backend *vmw_be =
	    container_of(backend, struct vmw_ttm_backend, backend);

	vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
	return 0;
}

static void vmw_ttm_clear(struct ttm_backend *backend)
{
	struct vmw_ttm_backend *vmw_be =
		container_of(backend, struct vmw_ttm_backend, backend);

	vmw_be->pages = NULL;
	vmw_be->num_pages = 0;
}

static void vmw_ttm_destroy(struct ttm_backend *backend)
{
	struct vmw_ttm_backend *vmw_be =
	    container_of(backend, struct vmw_ttm_backend, backend);

	kfree(vmw_be);
}

static struct ttm_backend_func vmw_ttm_func = {
	.populate = vmw_ttm_populate,
	.clear = vmw_ttm_clear,
	.bind = vmw_ttm_bind,
	.unbind = vmw_ttm_unbind,
	.destroy = vmw_ttm_destroy,
};

struct ttm_backend *vmw_ttm_backend_init(struct ttm_bo_device *bdev)
{
	struct vmw_ttm_backend *vmw_be;

	vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
	if (!vmw_be)
		return NULL;

	vmw_be->backend.func = &vmw_ttm_func;
	vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);

	return &vmw_be->backend;
}

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

int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
		      struct ttm_mem_type_manager *man)
{
	switch (type) {
	case TTM_PL_SYSTEM:
		/* System memory */

		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_FLAG_CACHED;
		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	case TTM_PL_VRAM:
		/* "On-card" video ram */
		man->func = &ttm_bo_manager_func;
		man->gpu_offset = 0;
		man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_FLAG_CACHED;
		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	case VMW_PL_GMR:
		/*
		 * "Guest Memory Regions" is an aperture like feature with
		 *  one slot per bo. There is an upper limit of the number of
		 *  slots as well as the bo size.
		 */
		man->func = &vmw_gmrid_manager_func;
		man->gpu_offset = 0;
		man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_FLAG_CACHED;
		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	default:
		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
		return -EINVAL;
	}
	return 0;
}

void vmw_evict_flags(struct ttm_buffer_object *bo,
		     struct ttm_placement *placement)
{
	*placement = vmw_sys_placement;
}

/**
 * FIXME: Proper access checks on buffers.
 */

static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
	return 0;
}

static int vmw_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 vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);

	mem->bus.addr = NULL;
	mem->bus.is_iomem = false;
	mem->bus.offset = 0;
	mem->bus.size = mem->num_pages << PAGE_SHIFT;
	mem->bus.base = 0;
	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
		return -EINVAL;
	switch (mem->mem_type) {
	case TTM_PL_SYSTEM:
	case VMW_PL_GMR:
		return 0;
	case TTM_PL_VRAM:
		mem->bus.offset = mem->start << PAGE_SHIFT;
		mem->bus.base = dev_priv->vram_start;
		mem->bus.is_iomem = true;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

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

static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
{
	return 0;
}

/**
 * FIXME: We're using the old vmware polling method to sync.
 * Do this with fences instead.
 */

static void *vmw_sync_obj_ref(void *sync_obj)
{
	return sync_obj;
}

static void vmw_sync_obj_unref(void **sync_obj)
{
	*sync_obj = NULL;
}

static int vmw_sync_obj_flush(void *sync_obj, void *sync_arg)
{
	struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;

	mutex_lock(&dev_priv->hw_mutex);
	vmw_write(dev_priv, SVGA_REG_SYNC, SVGA_SYNC_GENERIC);
	mutex_unlock(&dev_priv->hw_mutex);
	return 0;
}

static bool vmw_sync_obj_signaled(void *sync_obj, void *sync_arg)
{
	struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
	uint32_t sequence = (unsigned long) sync_obj;

	return vmw_fence_signaled(dev_priv, sequence);
}

static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
			     bool lazy, bool interruptible)
{
	struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
	uint32_t sequence = (unsigned long) sync_obj;

	return vmw_wait_fence(dev_priv, false, sequence, false, 3*HZ);
}

struct ttm_bo_driver vmw_bo_driver = {
	.create_ttm_backend_entry = vmw_ttm_backend_init,
	.invalidate_caches = vmw_invalidate_caches,
	.init_mem_type = vmw_init_mem_type,
	.evict_flags = vmw_evict_flags,
	.move = NULL,
	.verify_access = vmw_verify_access,
	.sync_obj_signaled = vmw_sync_obj_signaled,
	.sync_obj_wait = vmw_sync_obj_wait,
	.sync_obj_flush = vmw_sync_obj_flush,
	.sync_obj_unref = vmw_sync_obj_unref,
	.sync_obj_ref = vmw_sync_obj_ref,
	.move_notify = NULL,
	.swap_notify = NULL,
	.fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
	.io_mem_free = &vmw_ttm_io_mem_free,
};