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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 .get_scanout_position = vc4_crtc_get_scanoutpos,
194 .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
195
196#if defined(CONFIG_DEBUG_FS)
197 .debugfs_init = vc4_debugfs_init,
198#endif
199
200 .gem_create_object = vc4_create_object,
201 .gem_free_object_unlocked = vc4_free_object,
202 .gem_vm_ops = &vc4_vm_ops,
203
204 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
205 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
206 .gem_prime_export = vc4_prime_export,
207 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
208 .gem_prime_import_sg_table = vc4_prime_import_sg_table,
209 .gem_prime_vmap = vc4_prime_vmap,
210 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
211 .gem_prime_mmap = vc4_prime_mmap,
212
213 .dumb_create = vc4_dumb_create,
214
215 .ioctls = vc4_drm_ioctls,
216 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
217 .fops = &vc4_drm_fops,
218
219 .name = DRIVER_NAME,
220 .desc = DRIVER_DESC,
221 .date = DRIVER_DATE,
222 .major = DRIVER_MAJOR,
223 .minor = DRIVER_MINOR,
224 .patchlevel = DRIVER_PATCHLEVEL,
225};
226
227static int compare_dev(struct device *dev, void *data)
228{
229 return dev == data;
230}
231
232static void vc4_match_add_drivers(struct device *dev,
233 struct component_match **match,
234 struct platform_driver *const *drivers,
235 int count)
236{
237 int i;
238
239 for (i = 0; i < count; i++) {
240 struct device_driver *drv = &drivers[i]->driver;
241 struct device *p = NULL, *d;
242
243 while ((d = platform_find_device_by_driver(p, drv))) {
244 put_device(p);
245 component_match_add(dev, match, compare_dev, d);
246 p = d;
247 }
248 put_device(p);
249 }
250}
251
252static int vc4_drm_bind(struct device *dev)
253{
254 struct platform_device *pdev = to_platform_device(dev);
255 struct drm_device *drm;
256 struct vc4_dev *vc4;
257 struct device_node *node;
258 int ret = 0;
259
260 dev->coherent_dma_mask = DMA_BIT_MASK(32);
261
262 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
263 if (!vc4)
264 return -ENOMEM;
265
266 /* If VC4 V3D is missing, don't advertise render nodes. */
267 node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
268 if (!node || !of_device_is_available(node))
269 vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
270 of_node_put(node);
271
272 drm = drm_dev_alloc(&vc4_drm_driver, dev);
273 if (IS_ERR(drm))
274 return PTR_ERR(drm);
275 platform_set_drvdata(pdev, drm);
276 vc4->dev = drm;
277 drm->dev_private = vc4;
278 INIT_LIST_HEAD(&vc4->debugfs_list);
279
280 mutex_init(&vc4->bin_bo_lock);
281
282 ret = vc4_bo_cache_init(drm);
283 if (ret)
284 goto dev_put;
285
286 drm_mode_config_init(drm);
287
288 vc4_gem_init(drm);
289
290 ret = component_bind_all(dev, drm);
291 if (ret)
292 goto gem_destroy;
293
294 drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
295
296 ret = vc4_kms_load(drm);
297 if (ret < 0)
298 goto unbind_all;
299
300 ret = drm_dev_register(drm, 0);
301 if (ret < 0)
302 goto unbind_all;
303
304 drm_fbdev_generic_setup(drm, 16);
305
306 return 0;
307
308unbind_all:
309 component_unbind_all(dev, drm);
310gem_destroy:
311 vc4_gem_destroy(drm);
312 vc4_bo_cache_destroy(drm);
313dev_put:
314 drm_dev_put(drm);
315 return ret;
316}
317
318static void vc4_drm_unbind(struct device *dev)
319{
320 struct drm_device *drm = dev_get_drvdata(dev);
321 struct vc4_dev *vc4 = to_vc4_dev(drm);
322
323 drm_dev_unregister(drm);
324
325 drm_atomic_helper_shutdown(drm);
326
327 drm_mode_config_cleanup(drm);
328
329 drm_atomic_private_obj_fini(&vc4->load_tracker);
330 drm_atomic_private_obj_fini(&vc4->ctm_manager);
331
332 drm_dev_put(drm);
333}
334
335static const struct component_master_ops vc4_drm_ops = {
336 .bind = vc4_drm_bind,
337 .unbind = vc4_drm_unbind,
338};
339
340static struct platform_driver *const component_drivers[] = {
341 &vc4_hdmi_driver,
342 &vc4_vec_driver,
343 &vc4_dpi_driver,
344 &vc4_dsi_driver,
345 &vc4_txp_driver,
346 &vc4_hvs_driver,
347 &vc4_crtc_driver,
348 &vc4_v3d_driver,
349};
350
351static int vc4_platform_drm_probe(struct platform_device *pdev)
352{
353 struct component_match *match = NULL;
354 struct device *dev = &pdev->dev;
355
356 vc4_match_add_drivers(dev, &match,
357 component_drivers, ARRAY_SIZE(component_drivers));
358
359 return component_master_add_with_match(dev, &vc4_drm_ops, match);
360}
361
362static int vc4_platform_drm_remove(struct platform_device *pdev)
363{
364 component_master_del(&pdev->dev, &vc4_drm_ops);
365
366 return 0;
367}
368
369static const struct of_device_id vc4_of_match[] = {
370 { .compatible = "brcm,bcm2835-vc4", },
371 { .compatible = "brcm,cygnus-vc4", },
372 {},
373};
374MODULE_DEVICE_TABLE(of, vc4_of_match);
375
376static struct platform_driver vc4_platform_driver = {
377 .probe = vc4_platform_drm_probe,
378 .remove = vc4_platform_drm_remove,
379 .driver = {
380 .name = "vc4-drm",
381 .of_match_table = vc4_of_match,
382 },
383};
384
385static int __init vc4_drm_register(void)
386{
387 int ret;
388
389 ret = platform_register_drivers(component_drivers,
390 ARRAY_SIZE(component_drivers));
391 if (ret)
392 return ret;
393
394 return platform_driver_register(&vc4_platform_driver);
395}
396
397static void __exit vc4_drm_unregister(void)
398{
399 platform_unregister_drivers(component_drivers,
400 ARRAY_SIZE(component_drivers));
401 platform_driver_unregister(&vc4_platform_driver);
402}
403
404module_init(vc4_drm_register);
405module_exit(vc4_drm_unregister);
406
407MODULE_ALIAS("platform:vc4-drm");
408MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
409MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
410MODULE_LICENSE("GPL v2");