xref: /linux/drivers/gpu/drm/vc4/vc4_drv.c (revision bfd5bb6f90af092aa345b15cd78143956a13c2a8)
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 
37 #include "uapi/drm/vc4_drm.h"
38 #include "vc4_drv.h"
39 #include "vc4_regs.h"
40 
41 #define DRIVER_NAME "vc4"
42 #define DRIVER_DESC "Broadcom VC4 graphics"
43 #define DRIVER_DATE "20140616"
44 #define DRIVER_MAJOR 0
45 #define DRIVER_MINOR 0
46 #define DRIVER_PATCHLEVEL 0
47 
48 /* Helper function for mapping the regs on a platform device. */
49 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
50 {
51 	struct resource *res;
52 	void __iomem *map;
53 
54 	res = platform_get_resource(dev, IORESOURCE_MEM, index);
55 	map = devm_ioremap_resource(&dev->dev, res);
56 	if (IS_ERR(map)) {
57 		DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
58 		return map;
59 	}
60 
61 	return map;
62 }
63 
64 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
65 			       struct drm_file *file_priv)
66 {
67 	struct vc4_dev *vc4 = to_vc4_dev(dev);
68 	struct drm_vc4_get_param *args = data;
69 	int ret;
70 
71 	if (args->pad != 0)
72 		return -EINVAL;
73 
74 	switch (args->param) {
75 	case DRM_VC4_PARAM_V3D_IDENT0:
76 		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
77 		if (ret < 0)
78 			return ret;
79 		args->value = V3D_READ(V3D_IDENT0);
80 		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
81 		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
82 		break;
83 	case DRM_VC4_PARAM_V3D_IDENT1:
84 		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
85 		if (ret < 0)
86 			return ret;
87 		args->value = V3D_READ(V3D_IDENT1);
88 		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
89 		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
90 		break;
91 	case DRM_VC4_PARAM_V3D_IDENT2:
92 		ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
93 		if (ret < 0)
94 			return ret;
95 		args->value = V3D_READ(V3D_IDENT2);
96 		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
97 		pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev);
98 		break;
99 	case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
100 	case DRM_VC4_PARAM_SUPPORTS_ETC1:
101 	case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
102 	case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
103 	case DRM_VC4_PARAM_SUPPORTS_MADVISE:
104 	case DRM_VC4_PARAM_SUPPORTS_PERFMON:
105 		args->value = true;
106 		break;
107 	default:
108 		DRM_DEBUG("Unknown parameter %d\n", args->param);
109 		return -EINVAL;
110 	}
111 
112 	return 0;
113 }
114 
115 static int vc4_open(struct drm_device *dev, struct drm_file *file)
116 {
117 	struct vc4_file *vc4file;
118 
119 	vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
120 	if (!vc4file)
121 		return -ENOMEM;
122 
123 	vc4_perfmon_open_file(vc4file);
124 	file->driver_priv = vc4file;
125 	return 0;
126 }
127 
128 static void vc4_close(struct drm_device *dev, struct drm_file *file)
129 {
130 	struct vc4_file *vc4file = file->driver_priv;
131 
132 	vc4_perfmon_close_file(vc4file);
133 	kfree(vc4file);
134 }
135 
136 static const struct vm_operations_struct vc4_vm_ops = {
137 	.fault = vc4_fault,
138 	.open = drm_gem_vm_open,
139 	.close = drm_gem_vm_close,
140 };
141 
142 static const struct file_operations vc4_drm_fops = {
143 	.owner = THIS_MODULE,
144 	.open = drm_open,
145 	.release = drm_release,
146 	.unlocked_ioctl = drm_ioctl,
147 	.mmap = vc4_mmap,
148 	.poll = drm_poll,
149 	.read = drm_read,
150 	.compat_ioctl = drm_compat_ioctl,
151 	.llseek = noop_llseek,
152 };
153 
154 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
155 	DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
156 	DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
157 	DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
158 	DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
159 	DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
160 	DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
161 	DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
162 			  DRM_ROOT_ONLY),
163 	DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
164 	DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
165 	DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
166 	DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
167 	DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
168 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
169 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
170 	DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
171 };
172 
173 static struct drm_driver vc4_drm_driver = {
174 	.driver_features = (DRIVER_MODESET |
175 			    DRIVER_ATOMIC |
176 			    DRIVER_GEM |
177 			    DRIVER_HAVE_IRQ |
178 			    DRIVER_RENDER |
179 			    DRIVER_PRIME |
180 			    DRIVER_SYNCOBJ),
181 	.lastclose = drm_fb_helper_lastclose,
182 	.open = vc4_open,
183 	.postclose = vc4_close,
184 	.irq_handler = vc4_irq,
185 	.irq_preinstall = vc4_irq_preinstall,
186 	.irq_postinstall = vc4_irq_postinstall,
187 	.irq_uninstall = vc4_irq_uninstall,
188 
189 	.get_scanout_position = vc4_crtc_get_scanoutpos,
190 	.get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
191 
192 #if defined(CONFIG_DEBUG_FS)
193 	.debugfs_init = vc4_debugfs_init,
194 #endif
195 
196 	.gem_create_object = vc4_create_object,
197 	.gem_free_object_unlocked = vc4_free_object,
198 	.gem_vm_ops = &vc4_vm_ops,
199 
200 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
201 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
202 	.gem_prime_import = drm_gem_prime_import,
203 	.gem_prime_export = vc4_prime_export,
204 	.gem_prime_res_obj = vc4_prime_res_obj,
205 	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
206 	.gem_prime_import_sg_table = vc4_prime_import_sg_table,
207 	.gem_prime_vmap = vc4_prime_vmap,
208 	.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
209 	.gem_prime_mmap = vc4_prime_mmap,
210 
211 	.dumb_create = vc4_dumb_create,
212 
213 	.ioctls = vc4_drm_ioctls,
214 	.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
215 	.fops = &vc4_drm_fops,
216 
217 	.name = DRIVER_NAME,
218 	.desc = DRIVER_DESC,
219 	.date = DRIVER_DATE,
220 	.major = DRIVER_MAJOR,
221 	.minor = DRIVER_MINOR,
222 	.patchlevel = DRIVER_PATCHLEVEL,
223 };
224 
225 static int compare_dev(struct device *dev, void *data)
226 {
227 	return dev == data;
228 }
229 
230 static void vc4_match_add_drivers(struct device *dev,
231 				  struct component_match **match,
232 				  struct platform_driver *const *drivers,
233 				  int count)
234 {
235 	int i;
236 
237 	for (i = 0; i < count; i++) {
238 		struct device_driver *drv = &drivers[i]->driver;
239 		struct device *p = NULL, *d;
240 
241 		while ((d = bus_find_device(&platform_bus_type, p, drv,
242 					    (void *)platform_bus_type.match))) {
243 			put_device(p);
244 			component_match_add(dev, match, compare_dev, d);
245 			p = d;
246 		}
247 		put_device(p);
248 	}
249 }
250 
251 static void vc4_kick_out_firmware_fb(void)
252 {
253 	struct apertures_struct *ap;
254 
255 	ap = alloc_apertures(1);
256 	if (!ap)
257 		return;
258 
259 	/* Since VC4 is a UMA device, the simplefb node may have been
260 	 * located anywhere in memory.
261 	 */
262 	ap->ranges[0].base = 0;
263 	ap->ranges[0].size = ~0;
264 
265 	drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
266 	kfree(ap);
267 }
268 
269 static int vc4_drm_bind(struct device *dev)
270 {
271 	struct platform_device *pdev = to_platform_device(dev);
272 	struct drm_device *drm;
273 	struct vc4_dev *vc4;
274 	int ret = 0;
275 
276 	dev->coherent_dma_mask = DMA_BIT_MASK(32);
277 
278 	vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
279 	if (!vc4)
280 		return -ENOMEM;
281 
282 	drm = drm_dev_alloc(&vc4_drm_driver, dev);
283 	if (IS_ERR(drm))
284 		return PTR_ERR(drm);
285 	platform_set_drvdata(pdev, drm);
286 	vc4->dev = drm;
287 	drm->dev_private = vc4;
288 
289 	ret = vc4_bo_cache_init(drm);
290 	if (ret)
291 		goto dev_unref;
292 
293 	drm_mode_config_init(drm);
294 
295 	vc4_gem_init(drm);
296 
297 	ret = component_bind_all(dev, drm);
298 	if (ret)
299 		goto gem_destroy;
300 
301 	vc4_kick_out_firmware_fb();
302 
303 	ret = drm_dev_register(drm, 0);
304 	if (ret < 0)
305 		goto unbind_all;
306 
307 	vc4_kms_load(drm);
308 
309 	return 0;
310 
311 unbind_all:
312 	component_unbind_all(dev, drm);
313 gem_destroy:
314 	vc4_gem_destroy(drm);
315 	vc4_bo_cache_destroy(drm);
316 dev_unref:
317 	drm_dev_unref(drm);
318 	return ret;
319 }
320 
321 static void vc4_drm_unbind(struct device *dev)
322 {
323 	struct drm_device *drm = dev_get_drvdata(dev);
324 	struct vc4_dev *vc4 = to_vc4_dev(drm);
325 
326 	drm_dev_unregister(drm);
327 
328 	drm_fb_cma_fbdev_fini(drm);
329 
330 	drm_mode_config_cleanup(drm);
331 
332 	drm_atomic_private_obj_fini(&vc4->ctm_manager);
333 
334 	drm_dev_unref(drm);
335 }
336 
337 static const struct component_master_ops vc4_drm_ops = {
338 	.bind = vc4_drm_bind,
339 	.unbind = vc4_drm_unbind,
340 };
341 
342 static struct platform_driver *const component_drivers[] = {
343 	&vc4_hdmi_driver,
344 	&vc4_vec_driver,
345 	&vc4_dpi_driver,
346 	&vc4_dsi_driver,
347 	&vc4_hvs_driver,
348 	&vc4_crtc_driver,
349 	&vc4_v3d_driver,
350 };
351 
352 static 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 
363 static 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 
370 static const struct of_device_id vc4_of_match[] = {
371 	{ .compatible = "brcm,bcm2835-vc4", },
372 	{ .compatible = "brcm,cygnus-vc4", },
373 	{},
374 };
375 MODULE_DEVICE_TABLE(of, vc4_of_match);
376 
377 static 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 
386 static 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 
398 static 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 
405 module_init(vc4_drm_register);
406 module_exit(vc4_drm_unregister);
407 
408 MODULE_ALIAS("platform:vc4-drm");
409 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
410 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
411 MODULE_LICENSE("GPL v2");
412