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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2014-2015 Broadcom
4 * Copyright (C) 2013 Red Hat
5 */
6
7/**
8 * DOC: Broadcom VC4 Graphics Driver
9 *
10 * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
11 * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
12 * configurable display output pipeline that supports HDMI, DSI, DPI,
13 * and Composite TV output.
14 *
15 * The 3D engine also has an interface for submitting arbitrary
16 * compute shader-style jobs using the same shader processor as is
17 * used for vertex and fragment shaders in GLES 2.0. However, given
18 * that the hardware isn't able to expose any standard interfaces like
19 * OpenGL compute shaders or OpenCL, it isn't supported by this
20 * driver.
21 */
22
23#include <linux/clk.h>
24#include <linux/component.h>
25#include <linux/device.h>
26#include <linux/dma-mapping.h>
27#include <linux/io.h>
28#include <linux/module.h>
29#include <linux/of_platform.h>
30#include <linux/platform_device.h>
31#include <linux/pm_runtime.h>
32
33#include <drm/drm_atomic_helper.h>
34#include <drm/drm_drv.h>
35#include <drm/drm_fb_cma_helper.h>
36#include <drm/drm_fb_helper.h>
37#include <drm/drm_vblank.h>
38
39#include "uapi/drm/vc4_drm.h"
40
41#include "vc4_drv.h"
42#include "vc4_regs.h"
43
44#define DRIVER_NAME "vc4"
45#define DRIVER_DESC "Broadcom VC4 graphics"
46#define DRIVER_DATE "20140616"
47#define DRIVER_MAJOR 0
48#define DRIVER_MINOR 0
49#define DRIVER_PATCHLEVEL 0
50
51/* Helper function for mapping the regs on a platform device. */
52void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
53{
54 struct resource *res;
55 void __iomem *map;
56
57 res = platform_get_resource(dev, IORESOURCE_MEM, index);
58 map = devm_ioremap_resource(&dev->dev, res);
59 if (IS_ERR(map)) {
60 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
61 return map;
62 }
63
64 return map;
65}
66
67static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
68 struct drm_file *file_priv)
69{
70 struct vc4_dev *vc4 = to_vc4_dev(dev);
71 struct drm_vc4_get_param *args = data;
72 int ret;
73
74 if (args->pad != 0)
75 return -EINVAL;
76
77 if (!vc4->v3d)
78 return -ENODEV;
79
80 switch (args->param) {
81 case DRM_VC4_PARAM_V3D_IDENT0:
82 ret = vc4_v3d_pm_get(vc4);
83 if (ret)
84 return ret;
85 args->value = V3D_READ(V3D_IDENT0);
86 vc4_v3d_pm_put(vc4);
87 break;
88 case DRM_VC4_PARAM_V3D_IDENT1:
89 ret = vc4_v3d_pm_get(vc4);
90 if (ret)
91 return ret;
92 args->value = V3D_READ(V3D_IDENT1);
93 vc4_v3d_pm_put(vc4);
94 break;
95 case DRM_VC4_PARAM_V3D_IDENT2:
96 ret = vc4_v3d_pm_get(vc4);
97 if (ret)
98 return ret;
99 args->value = V3D_READ(V3D_IDENT2);
100 vc4_v3d_pm_put(vc4);
101 break;
102 case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
103 case DRM_VC4_PARAM_SUPPORTS_ETC1:
104 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
105 case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
106 case DRM_VC4_PARAM_SUPPORTS_MADVISE:
107 case DRM_VC4_PARAM_SUPPORTS_PERFMON:
108 args->value = true;
109 break;
110 default:
111 DRM_DEBUG("Unknown parameter %d\n", args->param);
112 return -EINVAL;
113 }
114
115 return 0;
116}
117
118static int vc4_open(struct drm_device *dev, struct drm_file *file)
119{
120 struct vc4_file *vc4file;
121
122 vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
123 if (!vc4file)
124 return -ENOMEM;
125
126 vc4_perfmon_open_file(vc4file);
127 file->driver_priv = vc4file;
128 return 0;
129}
130
131static void vc4_close(struct drm_device *dev, struct drm_file *file)
132{
133 struct vc4_dev *vc4 = to_vc4_dev(dev);
134 struct vc4_file *vc4file = file->driver_priv;
135
136 if (vc4file->bin_bo_used)
137 vc4_v3d_bin_bo_put(vc4);
138
139 vc4_perfmon_close_file(vc4file);
140 kfree(vc4file);
141}
142
143static const struct vm_operations_struct vc4_vm_ops = {
144 .fault = vc4_fault,
145 .open = drm_gem_vm_open,
146 .close = drm_gem_vm_close,
147};
148
149static const struct file_operations vc4_drm_fops = {
150 .owner = THIS_MODULE,
151 .open = drm_open,
152 .release = drm_release,
153 .unlocked_ioctl = drm_ioctl,
154 .mmap = vc4_mmap,
155 .poll = drm_poll,
156 .read = drm_read,
157 .compat_ioctl = drm_compat_ioctl,
158 .llseek = noop_llseek,
159};
160
161static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
162 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
163 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
164 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
165 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
166 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
167 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
168 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
169 DRM_ROOT_ONLY),
170 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
171 DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
172 DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
173 DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
174 DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
175 DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
176 DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
177 DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
178};
179
180static struct drm_driver vc4_drm_driver = {
181 .driver_features = (DRIVER_MODESET |
182 DRIVER_ATOMIC |
183 DRIVER_GEM |
184 DRIVER_RENDER |
185 DRIVER_SYNCOBJ),
186 .open = vc4_open,
187 .postclose = vc4_close,
188 .irq_handler = vc4_irq,
189 .irq_preinstall = vc4_irq_preinstall,
190 .irq_postinstall = vc4_irq_postinstall,
191 .irq_uninstall = vc4_irq_uninstall,
192
193#if defined(CONFIG_DEBUG_FS)
194 .debugfs_init = vc4_debugfs_init,
195#endif
196
197 .gem_create_object = vc4_create_object,
198 .gem_free_object_unlocked = vc4_free_object,
199 .gem_vm_ops = &vc4_vm_ops,
200
201 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
202 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
203 .gem_prime_export = vc4_prime_export,
204 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
205 .gem_prime_import_sg_table = vc4_prime_import_sg_table,
206 .gem_prime_vmap = vc4_prime_vmap,
207 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
208 .gem_prime_mmap = vc4_prime_mmap,
209
210 .dumb_create = vc4_dumb_create,
211
212 .ioctls = vc4_drm_ioctls,
213 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
214 .fops = &vc4_drm_fops,
215
216 .name = DRIVER_NAME,
217 .desc = DRIVER_DESC,
218 .date = DRIVER_DATE,
219 .major = DRIVER_MAJOR,
220 .minor = DRIVER_MINOR,
221 .patchlevel = DRIVER_PATCHLEVEL,
222};
223
224static int compare_dev(struct device *dev, void *data)
225{
226 return dev == data;
227}
228
229static void vc4_match_add_drivers(struct device *dev,
230 struct component_match **match,
231 struct platform_driver *const *drivers,
232 int count)
233{
234 int i;
235
236 for (i = 0; i < count; i++) {
237 struct device_driver *drv = &drivers[i]->driver;
238 struct device *p = NULL, *d;
239
240 while ((d = platform_find_device_by_driver(p, drv))) {
241 put_device(p);
242 component_match_add(dev, match, compare_dev, d);
243 p = d;
244 }
245 put_device(p);
246 }
247}
248
249static int vc4_drm_bind(struct device *dev)
250{
251 struct platform_device *pdev = to_platform_device(dev);
252 struct drm_device *drm;
253 struct vc4_dev *vc4;
254 struct device_node *node;
255 int ret = 0;
256
257 dev->coherent_dma_mask = DMA_BIT_MASK(32);
258
259 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
260 if (!vc4)
261 return -ENOMEM;
262
263 /* If VC4 V3D is missing, don't advertise render nodes. */
264 node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
265 if (!node || !of_device_is_available(node))
266 vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
267 of_node_put(node);
268
269 drm = drm_dev_alloc(&vc4_drm_driver, dev);
270 if (IS_ERR(drm))
271 return PTR_ERR(drm);
272 platform_set_drvdata(pdev, drm);
273 vc4->dev = drm;
274 drm->dev_private = vc4;
275 INIT_LIST_HEAD(&vc4->debugfs_list);
276
277 mutex_init(&vc4->bin_bo_lock);
278
279 ret = vc4_bo_cache_init(drm);
280 if (ret)
281 goto dev_put;
282
283 drm_mode_config_init(drm);
284
285 vc4_gem_init(drm);
286
287 ret = component_bind_all(dev, drm);
288 if (ret)
289 goto gem_destroy;
290
291 ret = vc4_plane_create_additional_planes(drm);
292 if (ret)
293 goto unbind_all;
294
295 drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
296
297 ret = vc4_kms_load(drm);
298 if (ret < 0)
299 goto unbind_all;
300
301 ret = drm_dev_register(drm, 0);
302 if (ret < 0)
303 goto unbind_all;
304
305 drm_fbdev_generic_setup(drm, 16);
306
307 return 0;
308
309unbind_all:
310 component_unbind_all(dev, drm);
311gem_destroy:
312 vc4_gem_destroy(drm);
313 vc4_bo_cache_destroy(drm);
314dev_put:
315 drm_dev_put(drm);
316 return ret;
317}
318
319static void vc4_drm_unbind(struct device *dev)
320{
321 struct drm_device *drm = dev_get_drvdata(dev);
322 struct vc4_dev *vc4 = to_vc4_dev(drm);
323
324 drm_dev_unregister(drm);
325
326 drm_atomic_helper_shutdown(drm);
327
328 drm_mode_config_cleanup(drm);
329
330 drm_atomic_private_obj_fini(&vc4->load_tracker);
331 drm_atomic_private_obj_fini(&vc4->ctm_manager);
332
333 drm_dev_put(drm);
334}
335
336static const struct component_master_ops vc4_drm_ops = {
337 .bind = vc4_drm_bind,
338 .unbind = vc4_drm_unbind,
339};
340
341static struct platform_driver *const component_drivers[] = {
342 &vc4_hdmi_driver,
343 &vc4_vec_driver,
344 &vc4_dpi_driver,
345 &vc4_dsi_driver,
346 &vc4_hvs_driver,
347 &vc4_txp_driver,
348 &vc4_crtc_driver,
349 &vc4_v3d_driver,
350};
351
352static int vc4_platform_drm_probe(struct platform_device *pdev)
353{
354 struct component_match *match = NULL;
355 struct device *dev = &pdev->dev;
356
357 vc4_match_add_drivers(dev, &match,
358 component_drivers, ARRAY_SIZE(component_drivers));
359
360 return component_master_add_with_match(dev, &vc4_drm_ops, match);
361}
362
363static int vc4_platform_drm_remove(struct platform_device *pdev)
364{
365 component_master_del(&pdev->dev, &vc4_drm_ops);
366
367 return 0;
368}
369
370static const struct of_device_id vc4_of_match[] = {
371 { .compatible = "brcm,bcm2835-vc4", },
372 { .compatible = "brcm,cygnus-vc4", },
373 {},
374};
375MODULE_DEVICE_TABLE(of, vc4_of_match);
376
377static struct platform_driver vc4_platform_driver = {
378 .probe = vc4_platform_drm_probe,
379 .remove = vc4_platform_drm_remove,
380 .driver = {
381 .name = "vc4-drm",
382 .of_match_table = vc4_of_match,
383 },
384};
385
386static int __init vc4_drm_register(void)
387{
388 int ret;
389
390 ret = platform_register_drivers(component_drivers,
391 ARRAY_SIZE(component_drivers));
392 if (ret)
393 return ret;
394
395 return platform_driver_register(&vc4_platform_driver);
396}
397
398static void __exit vc4_drm_unregister(void)
399{
400 platform_unregister_drivers(component_drivers,
401 ARRAY_SIZE(component_drivers));
402 platform_driver_unregister(&vc4_platform_driver);
403}
404
405module_init(vc4_drm_register);
406module_exit(vc4_drm_unregister);
407
408MODULE_ALIAS("platform:vc4-drm");
409MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
410MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
411MODULE_LICENSE("GPL v2");