Merge remote-tracking branch 'lightnvm/for-next'
[deliverable/linux.git] / drivers / gpu / drm / vc4 / vc4_drv.c
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 #include <linux/clk.h>
11 #include <linux/component.h>
12 #include <linux/device.h>
13 #include <linux/io.h>
14 #include <linux/module.h>
15 #include <linux/of_platform.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include "drm_fb_cma_helper.h"
19 #include <drm/drm_fb_helper.h>
20
21 #include "uapi/drm/vc4_drm.h"
22 #include "vc4_drv.h"
23 #include "vc4_regs.h"
24
25 #define DRIVER_NAME "vc4"
26 #define DRIVER_DESC "Broadcom VC4 graphics"
27 #define DRIVER_DATE "20140616"
28 #define DRIVER_MAJOR 0
29 #define DRIVER_MINOR 0
30 #define DRIVER_PATCHLEVEL 0
31
32 /* Helper function for mapping the regs on a platform device. */
33 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
34 {
35 struct resource *res;
36 void __iomem *map;
37
38 res = platform_get_resource(dev, IORESOURCE_MEM, index);
39 map = devm_ioremap_resource(&dev->dev, res);
40 if (IS_ERR(map)) {
41 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
42 return map;
43 }
44
45 return map;
46 }
47
48 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
49 struct drm_file *file_priv)
50 {
51 struct vc4_dev *vc4 = to_vc4_dev(dev);
52 struct drm_vc4_get_param *args = data;
53 int ret;
54
55 if (args->pad != 0)
56 return -EINVAL;
57
58 switch (args->param) {
59 case DRM_VC4_PARAM_V3D_IDENT0:
60 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
61 if (ret < 0)
62 return ret;
63 args->value = V3D_READ(V3D_IDENT0);
64 pm_runtime_put(&vc4->v3d->pdev->dev);
65 break;
66 case DRM_VC4_PARAM_V3D_IDENT1:
67 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
68 if (ret < 0)
69 return ret;
70 args->value = V3D_READ(V3D_IDENT1);
71 pm_runtime_put(&vc4->v3d->pdev->dev);
72 break;
73 case DRM_VC4_PARAM_V3D_IDENT2:
74 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
75 if (ret < 0)
76 return ret;
77 args->value = V3D_READ(V3D_IDENT2);
78 pm_runtime_put(&vc4->v3d->pdev->dev);
79 break;
80 case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
81 args->value = true;
82 break;
83 default:
84 DRM_DEBUG("Unknown parameter %d\n", args->param);
85 return -EINVAL;
86 }
87
88 return 0;
89 }
90
91 static void vc4_lastclose(struct drm_device *dev)
92 {
93 struct vc4_dev *vc4 = to_vc4_dev(dev);
94
95 drm_fbdev_cma_restore_mode(vc4->fbdev);
96 }
97
98 static const struct file_operations vc4_drm_fops = {
99 .owner = THIS_MODULE,
100 .open = drm_open,
101 .release = drm_release,
102 .unlocked_ioctl = drm_ioctl,
103 .mmap = vc4_mmap,
104 .poll = drm_poll,
105 .read = drm_read,
106 #ifdef CONFIG_COMPAT
107 .compat_ioctl = drm_compat_ioctl,
108 #endif
109 .llseek = noop_llseek,
110 };
111
112 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
113 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
114 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
115 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
116 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
117 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
118 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
119 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
120 DRM_ROOT_ONLY),
121 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
122 };
123
124 static struct drm_driver vc4_drm_driver = {
125 .driver_features = (DRIVER_MODESET |
126 DRIVER_ATOMIC |
127 DRIVER_GEM |
128 DRIVER_HAVE_IRQ |
129 DRIVER_RENDER |
130 DRIVER_PRIME),
131 .lastclose = vc4_lastclose,
132 .irq_handler = vc4_irq,
133 .irq_preinstall = vc4_irq_preinstall,
134 .irq_postinstall = vc4_irq_postinstall,
135 .irq_uninstall = vc4_irq_uninstall,
136
137 .enable_vblank = vc4_enable_vblank,
138 .disable_vblank = vc4_disable_vblank,
139 .get_vblank_counter = drm_vblank_no_hw_counter,
140 .get_scanout_position = vc4_crtc_get_scanoutpos,
141 .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
142
143 #if defined(CONFIG_DEBUG_FS)
144 .debugfs_init = vc4_debugfs_init,
145 .debugfs_cleanup = vc4_debugfs_cleanup,
146 #endif
147
148 .gem_create_object = vc4_create_object,
149 .gem_free_object_unlocked = vc4_free_object,
150 .gem_vm_ops = &drm_gem_cma_vm_ops,
151
152 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
153 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
154 .gem_prime_import = drm_gem_prime_import,
155 .gem_prime_export = vc4_prime_export,
156 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
157 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
158 .gem_prime_vmap = vc4_prime_vmap,
159 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
160 .gem_prime_mmap = vc4_prime_mmap,
161
162 .dumb_create = vc4_dumb_create,
163 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
164 .dumb_destroy = drm_gem_dumb_destroy,
165
166 .ioctls = vc4_drm_ioctls,
167 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
168 .fops = &vc4_drm_fops,
169
170 .name = DRIVER_NAME,
171 .desc = DRIVER_DESC,
172 .date = DRIVER_DATE,
173 .major = DRIVER_MAJOR,
174 .minor = DRIVER_MINOR,
175 .patchlevel = DRIVER_PATCHLEVEL,
176 };
177
178 static int compare_dev(struct device *dev, void *data)
179 {
180 return dev == data;
181 }
182
183 static void vc4_match_add_drivers(struct device *dev,
184 struct component_match **match,
185 struct platform_driver *const *drivers,
186 int count)
187 {
188 int i;
189
190 for (i = 0; i < count; i++) {
191 struct device_driver *drv = &drivers[i]->driver;
192 struct device *p = NULL, *d;
193
194 while ((d = bus_find_device(&platform_bus_type, p, drv,
195 (void *)platform_bus_type.match))) {
196 put_device(p);
197 component_match_add(dev, match, compare_dev, d);
198 p = d;
199 }
200 put_device(p);
201 }
202 }
203
204 static void vc4_kick_out_firmware_fb(void)
205 {
206 struct apertures_struct *ap;
207
208 ap = alloc_apertures(1);
209 if (!ap)
210 return;
211
212 /* Since VC4 is a UMA device, the simplefb node may have been
213 * located anywhere in memory.
214 */
215 ap->ranges[0].base = 0;
216 ap->ranges[0].size = ~0;
217
218 drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
219 kfree(ap);
220 }
221
222 static int vc4_drm_bind(struct device *dev)
223 {
224 struct platform_device *pdev = to_platform_device(dev);
225 struct drm_device *drm;
226 struct vc4_dev *vc4;
227 int ret = 0;
228
229 dev->coherent_dma_mask = DMA_BIT_MASK(32);
230
231 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
232 if (!vc4)
233 return -ENOMEM;
234
235 drm = drm_dev_alloc(&vc4_drm_driver, dev);
236 if (!drm)
237 return -ENOMEM;
238 platform_set_drvdata(pdev, drm);
239 vc4->dev = drm;
240 drm->dev_private = vc4;
241
242 vc4_bo_cache_init(drm);
243
244 drm_mode_config_init(drm);
245
246 vc4_gem_init(drm);
247
248 ret = component_bind_all(dev, drm);
249 if (ret)
250 goto gem_destroy;
251
252 vc4_kick_out_firmware_fb();
253
254 ret = drm_dev_register(drm, 0);
255 if (ret < 0)
256 goto unbind_all;
257
258 vc4_kms_load(drm);
259
260 return 0;
261
262 unbind_all:
263 component_unbind_all(dev, drm);
264 gem_destroy:
265 vc4_gem_destroy(drm);
266 drm_dev_unref(drm);
267 vc4_bo_cache_destroy(drm);
268 return ret;
269 }
270
271 static void vc4_drm_unbind(struct device *dev)
272 {
273 struct platform_device *pdev = to_platform_device(dev);
274 struct drm_device *drm = platform_get_drvdata(pdev);
275 struct vc4_dev *vc4 = to_vc4_dev(drm);
276
277 if (vc4->fbdev)
278 drm_fbdev_cma_fini(vc4->fbdev);
279
280 drm_mode_config_cleanup(drm);
281
282 drm_put_dev(drm);
283 }
284
285 static const struct component_master_ops vc4_drm_ops = {
286 .bind = vc4_drm_bind,
287 .unbind = vc4_drm_unbind,
288 };
289
290 static struct platform_driver *const component_drivers[] = {
291 &vc4_hdmi_driver,
292 &vc4_dpi_driver,
293 &vc4_hvs_driver,
294 &vc4_crtc_driver,
295 &vc4_v3d_driver,
296 };
297
298 static int vc4_platform_drm_probe(struct platform_device *pdev)
299 {
300 struct component_match *match = NULL;
301 struct device *dev = &pdev->dev;
302
303 vc4_match_add_drivers(dev, &match,
304 component_drivers, ARRAY_SIZE(component_drivers));
305
306 return component_master_add_with_match(dev, &vc4_drm_ops, match);
307 }
308
309 static int vc4_platform_drm_remove(struct platform_device *pdev)
310 {
311 component_master_del(&pdev->dev, &vc4_drm_ops);
312
313 return 0;
314 }
315
316 static const struct of_device_id vc4_of_match[] = {
317 { .compatible = "brcm,bcm2835-vc4", },
318 {},
319 };
320 MODULE_DEVICE_TABLE(of, vc4_of_match);
321
322 static struct platform_driver vc4_platform_driver = {
323 .probe = vc4_platform_drm_probe,
324 .remove = vc4_platform_drm_remove,
325 .driver = {
326 .name = "vc4-drm",
327 .of_match_table = vc4_of_match,
328 },
329 };
330
331 static int __init vc4_drm_register(void)
332 {
333 int i, ret;
334
335 for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
336 ret = platform_driver_register(component_drivers[i]);
337 if (ret) {
338 while (--i >= 0)
339 platform_driver_unregister(component_drivers[i]);
340 return ret;
341 }
342 }
343 return platform_driver_register(&vc4_platform_driver);
344 }
345
346 static void __exit vc4_drm_unregister(void)
347 {
348 int i;
349
350 for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
351 platform_driver_unregister(component_drivers[i]);
352
353 platform_driver_unregister(&vc4_platform_driver);
354 }
355
356 module_init(vc4_drm_register);
357 module_exit(vc4_drm_unregister);
358
359 MODULE_ALIAS("platform:vc4-drm");
360 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
361 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
362 MODULE_LICENSE("GPL v2");
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