xref: /linux/drivers/gpu/drm/vc4/vc4_drv.c (revision ec63e2a4897075e427c121d863bd89c44578094f)
1 /*
2  * Copyright (C) 2014-2015 Broadcom
3  * Copyright (C) 2013 Red Hat
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  */
9 
10 /**
11  * DOC: Broadcom VC4 Graphics Driver
12  *
13  * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
14  * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
15  * configurable display output pipeline that supports HDMI, DSI, DPI,
16  * and Composite TV output.
17  *
18  * The 3D engine also has an interface for submitting arbitrary
19  * compute shader-style jobs using the same shader processor as is
20  * used for vertex and fragment shaders in GLES 2.0.  However, given
21  * that the hardware isn't able to expose any standard interfaces like
22  * OpenGL compute shaders or OpenCL, it isn't supported by this
23  * driver.
24  */
25 
26 #include <linux/clk.h>
27 #include <linux/component.h>
28 #include <linux/device.h>
29 #include <linux/io.h>
30 #include <linux/module.h>
31 #include <linux/of_platform.h>
32 #include <linux/platform_device.h>
33 #include <linux/pm_runtime.h>
34 #include <drm/drm_fb_cma_helper.h>
35 #include <drm/drm_fb_helper.h>
36 #include <drm/drm_atomic_helper.h>
37 
38 #include "uapi/drm/vc4_drm.h"
39 #include "vc4_drv.h"
40 #include "vc4_regs.h"
41 
42 #define DRIVER_NAME "vc4"
43 #define DRIVER_DESC "Broadcom VC4 graphics"
44 #define DRIVER_DATE "20140616"
45 #define DRIVER_MAJOR 0
46 #define DRIVER_MINOR 0
47 #define DRIVER_PATCHLEVEL 0
48 
49 /* Helper function for mapping the regs on a platform device. */
50 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
51 {
52 	struct resource *res;
53 	void __iomem *map;
54 
55 	res = platform_get_resource(dev, IORESOURCE_MEM, index);
56 	map = devm_ioremap_resource(&dev->dev, res);
57 	if (IS_ERR(map)) {
58 		DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
59 		return map;
60 	}
61 
62 	return map;
63 }
64 
65 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
66 			       struct drm_file *file_priv)
67 {
68 	struct vc4_dev *vc4 = to_vc4_dev(dev);
69 	struct drm_vc4_get_param *args = data;
70 	int ret;
71 
72 	if (args->pad != 0)
73 		return -EINVAL;
74 
75 	switch (args->param) {
76 	case DRM_VC4_PARAM_V3D_IDENT0:
77 		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
78 		if (ret < 0)
79 			return ret;
80 		args->value = V3D_READ(V3D_IDENT0);
81 		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
82 		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
83 		break;
84 	case DRM_VC4_PARAM_V3D_IDENT1:
85 		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
86 		if (ret < 0)
87 			return ret;
88 		args->value = V3D_READ(V3D_IDENT1);
89 		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
90 		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
91 		break;
92 	case DRM_VC4_PARAM_V3D_IDENT2:
93 		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
94 		if (ret < 0)
95 			return ret;
96 		args->value = V3D_READ(V3D_IDENT2);
97 		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
98 		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
99 		break;
100 	case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
101 	case DRM_VC4_PARAM_SUPPORTS_ETC1:
102 	case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
103 	case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
104 	case DRM_VC4_PARAM_SUPPORTS_MADVISE:
105 	case DRM_VC4_PARAM_SUPPORTS_PERFMON:
106 		args->value = true;
107 		break;
108 	default:
109 		DRM_DEBUG("Unknown parameter %d\n", args->param);
110 		return -EINVAL;
111 	}
112 
113 	return 0;
114 }
115 
116 static int vc4_open(struct drm_device *dev, struct drm_file *file)
117 {
118 	struct vc4_file *vc4file;
119 
120 	vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
121 	if (!vc4file)
122 		return -ENOMEM;
123 
124 	vc4_perfmon_open_file(vc4file);
125 	file->driver_priv = vc4file;
126 	return 0;
127 }
128 
129 static void vc4_close(struct drm_device *dev, struct drm_file *file)
130 {
131 	struct vc4_file *vc4file = file->driver_priv;
132 
133 	vc4_perfmon_close_file(vc4file);
134 	kfree(vc4file);
135 }
136 
137 static const struct vm_operations_struct vc4_vm_ops = {
138 	.fault = vc4_fault,
139 	.open = drm_gem_vm_open,
140 	.close = drm_gem_vm_close,
141 };
142 
143 static const struct file_operations vc4_drm_fops = {
144 	.owner = THIS_MODULE,
145 	.open = drm_open,
146 	.release = drm_release,
147 	.unlocked_ioctl = drm_ioctl,
148 	.mmap = vc4_mmap,
149 	.poll = drm_poll,
150 	.read = drm_read,
151 	.compat_ioctl = drm_compat_ioctl,
152 	.llseek = noop_llseek,
153 };
154 
155 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
156 	DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
157 	DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
158 	DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
159 	DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
160 	DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
161 	DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
162 	DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
163 			  DRM_ROOT_ONLY),
164 	DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
165 	DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
166 	DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
167 	DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
168 	DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
169 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
170 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
171 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
172 };
173 
174 static struct drm_driver vc4_drm_driver = {
175 	.driver_features = (DRIVER_MODESET |
176 			    DRIVER_ATOMIC |
177 			    DRIVER_GEM |
178 			    DRIVER_RENDER |
179 			    DRIVER_PRIME |
180 			    DRIVER_SYNCOBJ),
181 	.open = vc4_open,
182 	.postclose = vc4_close,
183 	.irq_handler = vc4_irq,
184 	.irq_preinstall = vc4_irq_preinstall,
185 	.irq_postinstall = vc4_irq_postinstall,
186 	.irq_uninstall = vc4_irq_uninstall,
187 
188 	.get_scanout_position = vc4_crtc_get_scanoutpos,
189 	.get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
190 
191 #if defined(CONFIG_DEBUG_FS)
192 	.debugfs_init = vc4_debugfs_init,
193 #endif
194 
195 	.gem_create_object = vc4_create_object,
196 	.gem_free_object_unlocked = vc4_free_object,
197 	.gem_vm_ops = &vc4_vm_ops,
198 
199 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
200 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
201 	.gem_prime_import = drm_gem_prime_import,
202 	.gem_prime_export = vc4_prime_export,
203 	.gem_prime_res_obj = vc4_prime_res_obj,
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 
224 static int compare_dev(struct device *dev, void *data)
225 {
226 	return dev == data;
227 }
228 
229 static 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 = bus_find_device(&platform_bus_type, p, drv,
241 					    (void *)platform_bus_type.match))) {
242 			put_device(p);
243 			component_match_add(dev, match, compare_dev, d);
244 			p = d;
245 		}
246 		put_device(p);
247 	}
248 }
249 
250 static int vc4_drm_bind(struct device *dev)
251 {
252 	struct platform_device *pdev = to_platform_device(dev);
253 	struct drm_device *drm;
254 	struct vc4_dev *vc4;
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 	drm = drm_dev_alloc(&vc4_drm_driver, dev);
264 	if (IS_ERR(drm))
265 		return PTR_ERR(drm);
266 	platform_set_drvdata(pdev, drm);
267 	vc4->dev = drm;
268 	drm->dev_private = vc4;
269 
270 	ret = vc4_bo_cache_init(drm);
271 	if (ret)
272 		goto dev_put;
273 
274 	drm_mode_config_init(drm);
275 
276 	vc4_gem_init(drm);
277 
278 	ret = component_bind_all(dev, drm);
279 	if (ret)
280 		goto gem_destroy;
281 
282 	drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
283 
284 	ret = drm_dev_register(drm, 0);
285 	if (ret < 0)
286 		goto unbind_all;
287 
288 	vc4_kms_load(drm);
289 
290 	drm_fbdev_generic_setup(drm, 32);
291 
292 	return 0;
293 
294 unbind_all:
295 	component_unbind_all(dev, drm);
296 gem_destroy:
297 	vc4_gem_destroy(drm);
298 	vc4_bo_cache_destroy(drm);
299 dev_put:
300 	drm_dev_put(drm);
301 	return ret;
302 }
303 
304 static void vc4_drm_unbind(struct device *dev)
305 {
306 	struct drm_device *drm = dev_get_drvdata(dev);
307 	struct vc4_dev *vc4 = to_vc4_dev(drm);
308 
309 	drm_dev_unregister(drm);
310 
311 	drm_atomic_helper_shutdown(drm);
312 
313 	drm_mode_config_cleanup(drm);
314 
315 	drm_atomic_private_obj_fini(&vc4->ctm_manager);
316 
317 	drm_dev_put(drm);
318 }
319 
320 static const struct component_master_ops vc4_drm_ops = {
321 	.bind = vc4_drm_bind,
322 	.unbind = vc4_drm_unbind,
323 };
324 
325 static struct platform_driver *const component_drivers[] = {
326 	&vc4_hdmi_driver,
327 	&vc4_vec_driver,
328 	&vc4_dpi_driver,
329 	&vc4_dsi_driver,
330 	&vc4_txp_driver,
331 	&vc4_hvs_driver,
332 	&vc4_crtc_driver,
333 	&vc4_v3d_driver,
334 };
335 
336 static int vc4_platform_drm_probe(struct platform_device *pdev)
337 {
338 	struct component_match *match = NULL;
339 	struct device *dev = &pdev->dev;
340 
341 	vc4_match_add_drivers(dev, &match,
342 			      component_drivers, ARRAY_SIZE(component_drivers));
343 
344 	return component_master_add_with_match(dev, &vc4_drm_ops, match);
345 }
346 
347 static int vc4_platform_drm_remove(struct platform_device *pdev)
348 {
349 	component_master_del(&pdev->dev, &vc4_drm_ops);
350 
351 	return 0;
352 }
353 
354 static const struct of_device_id vc4_of_match[] = {
355 	{ .compatible = "brcm,bcm2835-vc4", },
356 	{ .compatible = "brcm,cygnus-vc4", },
357 	{},
358 };
359 MODULE_DEVICE_TABLE(of, vc4_of_match);
360 
361 static struct platform_driver vc4_platform_driver = {
362 	.probe		= vc4_platform_drm_probe,
363 	.remove		= vc4_platform_drm_remove,
364 	.driver		= {
365 		.name	= "vc4-drm",
366 		.of_match_table = vc4_of_match,
367 	},
368 };
369 
370 static int __init vc4_drm_register(void)
371 {
372 	int ret;
373 
374 	ret = platform_register_drivers(component_drivers,
375 					ARRAY_SIZE(component_drivers));
376 	if (ret)
377 		return ret;
378 
379 	return platform_driver_register(&vc4_platform_driver);
380 }
381 
382 static void __exit vc4_drm_unregister(void)
383 {
384 	platform_unregister_drivers(component_drivers,
385 				    ARRAY_SIZE(component_drivers));
386 	platform_driver_unregister(&vc4_platform_driver);
387 }
388 
389 module_init(vc4_drm_register);
390 module_exit(vc4_drm_unregister);
391 
392 MODULE_ALIAS("platform:vc4-drm");
393 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
394 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
395 MODULE_LICENSE("GPL v2");
396