summaryrefslogtreecommitdiff
path: root/freedreno/kgsl/kgsl_bo.c
blob: f151186466774bb7d1db31f0b7fe48efc174420a (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
/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

/*
 * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
 *
 * 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 (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 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.
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include "kgsl_priv.h"

#include <linux/fb.h>

static int set_memtype(struct fd_device *dev, uint32_t handle, uint32_t flags)
{
	struct drm_kgsl_gem_memtype req = {
			.handle = handle,
			.type = flags & DRM_FREEDRENO_GEM_TYPE_MEM_MASK,
	};

	return drmCommandWrite(dev->fd, DRM_KGSL_GEM_SETMEMTYPE,
			&req, sizeof(req));
}

static int bo_alloc(struct kgsl_bo *kgsl_bo)
{
	struct fd_bo *bo = &kgsl_bo->base;
	if (!kgsl_bo->offset) {
		struct drm_kgsl_gem_alloc req = {
				.handle = bo->handle,
		};
		int ret;

		/* if the buffer is already backed by pages then this
		 * doesn't actually do anything (other than giving us
		 * the offset)
		 */
		ret = drmCommandWriteRead(bo->dev->fd, DRM_KGSL_GEM_ALLOC,
				&req, sizeof(req));
		if (ret) {
			ERROR_MSG("alloc failed: %s", strerror(errno));
			return ret;
		}

		kgsl_bo->offset = req.offset;
	}

	return 0;
}

static int kgsl_bo_offset(struct fd_bo *bo, uint64_t *offset)
{
	struct kgsl_bo *kgsl_bo = to_kgsl_bo(bo);
	int ret = bo_alloc(kgsl_bo);
	if (ret)
		return ret;
	*offset = kgsl_bo->offset;
	return 0;
}

static int kgsl_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op)
{
	uint32_t timestamp = kgsl_bo_get_timestamp(to_kgsl_bo(bo));

	if (op & DRM_FREEDRENO_PREP_NOSYNC) {
		uint32_t current;
		int ret;

		/* special case for is_idle().. we can't really handle that
		 * properly in kgsl (perhaps we need a way to just disable
		 * the bo-cache for kgsl?)
		 */
		if (!pipe)
			return -EBUSY;

		ret = kgsl_pipe_timestamp(to_kgsl_pipe(pipe), &current);
		if (ret)
			return ret;

		if (timestamp > current)
			return -EBUSY;

		return 0;
	}

	if (timestamp)
		fd_pipe_wait(pipe, timestamp);

	return 0;
}

static void kgsl_bo_cpu_fini(struct fd_bo *bo)
{
}

static void kgsl_bo_destroy(struct fd_bo *bo)
{
	struct kgsl_bo *kgsl_bo = to_kgsl_bo(bo);
	free(kgsl_bo);

}

static struct fd_bo_funcs funcs = {
		.offset = kgsl_bo_offset,
		.cpu_prep = kgsl_bo_cpu_prep,
		.cpu_fini = kgsl_bo_cpu_fini,
		.destroy = kgsl_bo_destroy,
};

/* allocate a buffer handle: */
drm_private int kgsl_bo_new_handle(struct fd_device *dev,
		uint32_t size, uint32_t flags, uint32_t *handle)
{
	struct drm_kgsl_gem_create req = {
			.size = size,
	};
	int ret;

	ret = drmCommandWriteRead(dev->fd, DRM_KGSL_GEM_CREATE,
			&req, sizeof(req));
	if (ret)
		return ret;

	// TODO make flags match msm driver, since kgsl is legacy..
	// translate flags in kgsl..

	set_memtype(dev, req.handle, flags);

	*handle = req.handle;

	return 0;
}

/* allocate a new buffer object */
drm_private struct fd_bo * kgsl_bo_from_handle(struct fd_device *dev,
		uint32_t size, uint32_t handle)
{
	struct kgsl_bo *kgsl_bo;
	struct fd_bo *bo;
	unsigned i;

	kgsl_bo = calloc(1, sizeof(*kgsl_bo));
	if (!kgsl_bo)
		return NULL;

	bo = &kgsl_bo->base;
	bo->funcs = &funcs;

	for (i = 0; i < ARRAY_SIZE(kgsl_bo->list); i++)
		list_inithead(&kgsl_bo->list[i]);

	return bo;
}

drm_public struct fd_bo *
fd_bo_from_fbdev(struct fd_pipe *pipe, int fbfd, uint32_t size)
{
	struct fd_bo *bo;

	if (!is_kgsl_pipe(pipe))
		return NULL;

	bo = fd_bo_new(pipe->dev, 1, 0);

	/* this is fugly, but works around a bug in the kernel..
	 * priv->memdesc.size never gets set, so getbufinfo ioctl
	 * thinks the buffer hasn't be allocate and fails
	 */
	if (bo) {
		void *fbmem = drm_mmap(NULL, size, PROT_READ | PROT_WRITE,
				MAP_SHARED, fbfd, 0);
		struct kgsl_map_user_mem req = {
				.memtype = KGSL_USER_MEM_TYPE_ADDR,
				.len     = size,
				.offset  = 0,
				.hostptr = (unsigned long)fbmem,
		};
		struct kgsl_bo *kgsl_bo = to_kgsl_bo(bo);
		int ret;

		ret = ioctl(to_kgsl_pipe(pipe)->fd, IOCTL_KGSL_MAP_USER_MEM, &req);
		if (ret) {
			ERROR_MSG("mapping user mem failed: %s",
					strerror(errno));
			goto fail;
		}
		kgsl_bo->gpuaddr = req.gpuaddr;
		bo->map = fbmem;
	}

	return bo;
fail:
	if (bo)
		fd_bo_del(bo);
	return NULL;
}

drm_private uint32_t kgsl_bo_gpuaddr(struct kgsl_bo *kgsl_bo, uint32_t offset)
{
	struct fd_bo *bo = &kgsl_bo->base;
	if (!kgsl_bo->gpuaddr) {
		struct drm_kgsl_gem_bufinfo req = {
				.handle = bo->handle,
		};
		int ret;

		ret = bo_alloc(kgsl_bo);
		if (ret) {
			return ret;
		}

		ret = drmCommandWriteRead(bo->dev->fd, DRM_KGSL_GEM_GET_BUFINFO,
				&req, sizeof(req));
		if (ret) {
			ERROR_MSG("get bufinfo failed: %s", strerror(errno));
			return 0;
		}

		kgsl_bo->gpuaddr = req.gpuaddr[0];
	}
	return kgsl_bo->gpuaddr + offset;
}

/*
 * Super-cheezy way to synchronization between mesa and ddx..  the
 * SET_ACTIVE ioctl gives us a way to stash a 32b # w/ a GEM bo, and
 * GET_BUFINFO gives us a way to retrieve it.  We use this to stash
 * the timestamp of the last ISSUEIBCMDS on the buffer.
 *
 * To avoid an obscene amount of syscalls, we:
 *  1) Only set the timestamp for buffers w/ an flink name, ie.
 *     only buffers shared across processes.  This is enough to
 *     catch the DRI2 buffers.
 *  2) Only set the timestamp for buffers submitted to the 3d ring
 *     and only check the timestamps on buffers submitted to the
 *     2d ring.  This should be enough to handle synchronizing of
 *     presentation blit.  We could do synchronization in the other
 *     direction too, but that would be problematic if we are using
 *     the 3d ring from DDX, since client side wouldn't know this.
 *
 * The waiting on timestamp happens before flush, and setting of
 * timestamp happens after flush.  It is transparent to the user
 * of libdrm_freedreno as all the tracking of buffers happens via
 * _emit_reloc()..
 */

drm_private void kgsl_bo_set_timestamp(struct kgsl_bo *kgsl_bo,
		uint32_t timestamp)
{
	struct fd_bo *bo = &kgsl_bo->base;
	if (bo->name) {
		struct drm_kgsl_gem_active req = {
				.handle = bo->handle,
				.active = timestamp,
		};
		int ret;

		ret = drmCommandWrite(bo->dev->fd, DRM_KGSL_GEM_SET_ACTIVE,
				&req, sizeof(req));
		if (ret) {
			ERROR_MSG("set active failed: %s", strerror(errno));
		}
	}
}

drm_private uint32_t kgsl_bo_get_timestamp(struct kgsl_bo *kgsl_bo)
{
	struct fd_bo *bo = &kgsl_bo->base;
	uint32_t timestamp = 0;
	if (bo->name) {
		struct drm_kgsl_gem_bufinfo req = {
				.handle = bo->handle,
		};
		int ret;

		ret = drmCommandWriteRead(bo->dev->fd, DRM_KGSL_GEM_GET_BUFINFO,
				&req, sizeof(req));
		if (ret) {
			ERROR_MSG("get bufinfo failed: %s", strerror(errno));
			return 0;
		}

		timestamp = req.active;
	}
	return timestamp;
}