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
|
/*
* Copyright (C) 2014-2015 Broadcom
* Copyright (C) 2013 Red Hat
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/**
* DOC: Broadcom VC4 Graphics Driver
*
* The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
* OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
* configurable display output pipeline that supports HDMI, DSI, DPI,
* and Composite TV output.
*
* The 3D engine also has an interface for submitting arbitrary
* compute shader-style jobs using the same shader processor as is
* used for vertex and fragment shaders in GLES 2.0. However, given
* that the hardware isn't able to expose any standard interfaces like
* OpenGL compute shaders or OpenCL, it isn't supported by this
* driver.
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
#include "vc4_regs.h"
#define DRIVER_NAME "vc4"
#define DRIVER_DESC "Broadcom VC4 graphics"
#define DRIVER_DATE "20140616"
#define DRIVER_MAJOR 0
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0
/* Helper function for mapping the regs on a platform device. */
void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
{
struct resource *res;
void __iomem *map;
res = platform_get_resource(dev, IORESOURCE_MEM, index);
map = devm_ioremap_resource(&dev->dev, res);
if (IS_ERR(map)) {
DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
return map;
}
return map;
}
static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_vc4_get_param *args = data;
int ret;
if (args->pad != 0)
return -EINVAL;
switch (args->param) {
case DRM_VC4_PARAM_V3D_IDENT0:
ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
if (ret < 0)
return ret;
args->value = V3D_READ(V3D_IDENT0);
pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
break;
case DRM_VC4_PARAM_V3D_IDENT1:
ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
if (ret < 0)
return ret;
args->value = V3D_READ(V3D_IDENT1);
pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
break;
case DRM_VC4_PARAM_V3D_IDENT2:
ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
if (ret < 0)
return ret;
args->value = V3D_READ(V3D_IDENT2);
pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
break;
case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
case DRM_VC4_PARAM_SUPPORTS_ETC1:
case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
case DRM_VC4_PARAM_SUPPORTS_MADVISE:
case DRM_VC4_PARAM_SUPPORTS_PERFMON:
args->value = true;
break;
default:
DRM_DEBUG("Unknown parameter %d\n", args->param);
return -EINVAL;
}
return 0;
}
static int vc4_open(struct drm_device *dev, struct drm_file *file)
{
struct vc4_file *vc4file;
vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
if (!vc4file)
return -ENOMEM;
vc4_perfmon_open_file(vc4file);
file->driver_priv = vc4file;
return 0;
}
static void vc4_close(struct drm_device *dev, struct drm_file *file)
{
struct vc4_file *vc4file = file->driver_priv;
vc4_perfmon_close_file(vc4file);
kfree(vc4file);
}
static const struct vm_operations_struct vc4_vm_ops = {
.fault = vc4_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static const struct file_operations vc4_drm_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.mmap = vc4_mmap,
.poll = drm_poll,
.read = drm_read,
.compat_ioctl = drm_compat_ioctl,
.llseek = noop_llseek,
};
static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
};
static struct drm_driver vc4_drm_driver = {
.driver_features = (DRIVER_MODESET |
DRIVER_ATOMIC |
DRIVER_GEM |
DRIVER_HAVE_IRQ |
DRIVER_RENDER |
DRIVER_PRIME |
DRIVER_SYNCOBJ),
.lastclose = drm_fb_helper_lastclose,
.open = vc4_open,
.postclose = vc4_close,
.irq_handler = vc4_irq,
.irq_preinstall = vc4_irq_preinstall,
.irq_postinstall = vc4_irq_postinstall,
.irq_uninstall = vc4_irq_uninstall,
.get_scanout_position = vc4_crtc_get_scanoutpos,
.get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
#if defined(CONFIG_DEBUG_FS)
.debugfs_init = vc4_debugfs_init,
#endif
.gem_create_object = vc4_create_object,
.gem_free_object_unlocked = vc4_free_object,
.gem_vm_ops = &vc4_vm_ops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_export = vc4_prime_export,
.gem_prime_res_obj = vc4_prime_res_obj,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = vc4_prime_import_sg_table,
.gem_prime_vmap = vc4_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = vc4_prime_mmap,
.dumb_create = vc4_dumb_create,
.ioctls = vc4_drm_ioctls,
.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
.fops = &vc4_drm_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
};
static int compare_dev(struct device *dev, void *data)
{
return dev == data;
}
static void vc4_match_add_drivers(struct device *dev,
struct component_match **match,
struct platform_driver *const *drivers,
int count)
{
int i;
for (i = 0; i < count; i++) {
struct device_driver *drv = &drivers[i]->driver;
struct device *p = NULL, *d;
while ((d = bus_find_device(&platform_bus_type, p, drv,
(void *)platform_bus_type.match))) {
put_device(p);
component_match_add(dev, match, compare_dev, d);
p = d;
}
put_device(p);
}
}
static void vc4_kick_out_firmware_fb(void)
{
struct apertures_struct *ap;
ap = alloc_apertures(1);
if (!ap)
return;
/* Since VC4 is a UMA device, the simplefb node may have been
* located anywhere in memory.
*/
ap->ranges[0].base = 0;
ap->ranges[0].size = ~0;
drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
kfree(ap);
}
static int vc4_drm_bind(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm;
struct vc4_dev *vc4;
int ret = 0;
dev->coherent_dma_mask = DMA_BIT_MASK(32);
vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
if (!vc4)
return -ENOMEM;
drm = drm_dev_alloc(&vc4_drm_driver, dev);
if (IS_ERR(drm))
return PTR_ERR(drm);
platform_set_drvdata(pdev, drm);
vc4->dev = drm;
drm->dev_private = vc4;
ret = vc4_bo_cache_init(drm);
if (ret)
goto dev_put;
drm_mode_config_init(drm);
vc4_gem_init(drm);
ret = component_bind_all(dev, drm);
if (ret)
goto gem_destroy;
vc4_kick_out_firmware_fb();
ret = drm_dev_register(drm, 0);
if (ret < 0)
goto unbind_all;
vc4_kms_load(drm);
return 0;
unbind_all:
component_unbind_all(dev, drm);
gem_destroy:
vc4_gem_destroy(drm);
vc4_bo_cache_destroy(drm);
dev_put:
drm_dev_put(drm);
return ret;
}
static void vc4_drm_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct vc4_dev *vc4 = to_vc4_dev(drm);
drm_dev_unregister(drm);
drm_fb_cma_fbdev_fini(drm);
drm_mode_config_cleanup(drm);
drm_atomic_private_obj_fini(&vc4->ctm_manager);
drm_dev_put(drm);
}
static const struct component_master_ops vc4_drm_ops = {
.bind = vc4_drm_bind,
.unbind = vc4_drm_unbind,
};
static struct platform_driver *const component_drivers[] = {
&vc4_hdmi_driver,
&vc4_vec_driver,
&vc4_dpi_driver,
&vc4_dsi_driver,
&vc4_txp_driver,
&vc4_hvs_driver,
&vc4_crtc_driver,
&vc4_v3d_driver,
};
static int vc4_platform_drm_probe(struct platform_device *pdev)
{
struct component_match *match = NULL;
struct device *dev = &pdev->dev;
vc4_match_add_drivers(dev, &match,
component_drivers, ARRAY_SIZE(component_drivers));
return component_master_add_with_match(dev, &vc4_drm_ops, match);
}
static int vc4_platform_drm_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &vc4_drm_ops);
return 0;
}
static const struct of_device_id vc4_of_match[] = {
{ .compatible = "brcm,bcm2835-vc4", },
{ .compatible = "brcm,cygnus-vc4", },
{},
};
MODULE_DEVICE_TABLE(of, vc4_of_match);
static struct platform_driver vc4_platform_driver = {
.probe = vc4_platform_drm_probe,
.remove = vc4_platform_drm_remove,
.driver = {
.name = "vc4-drm",
.of_match_table = vc4_of_match,
},
};
static int __init vc4_drm_register(void)
{
int ret;
ret = platform_register_drivers(component_drivers,
ARRAY_SIZE(component_drivers));
if (ret)
return ret;
return platform_driver_register(&vc4_platform_driver);
}
static void __exit vc4_drm_unregister(void)
{
platform_unregister_drivers(component_drivers,
ARRAY_SIZE(component_drivers));
platform_driver_unregister(&vc4_platform_driver);
}
module_init(vc4_drm_register);
module_exit(vc4_drm_unregister);
MODULE_ALIAS("platform:vc4-drm");
MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
MODULE_LICENSE("GPL v2");
|