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[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 /**
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                 args->value = true;
105                 break;
106         default:
107                 DRM_DEBUG("Unknown parameter %d\n", args->param);
108                 return -EINVAL;
109         }
110
111         return 0;
112 }
113
114 static void vc4_lastclose(struct drm_device *dev)
115 {
116         struct vc4_dev *vc4 = to_vc4_dev(dev);
117
118         drm_fbdev_cma_restore_mode(vc4->fbdev);
119 }
120
121 static const struct vm_operations_struct vc4_vm_ops = {
122         .fault = vc4_fault,
123         .open = drm_gem_vm_open,
124         .close = drm_gem_vm_close,
125 };
126
127 static const struct file_operations vc4_drm_fops = {
128         .owner = THIS_MODULE,
129         .open = drm_open,
130         .release = drm_release,
131         .unlocked_ioctl = drm_ioctl,
132         .mmap = vc4_mmap,
133         .poll = drm_poll,
134         .read = drm_read,
135         .compat_ioctl = drm_compat_ioctl,
136         .llseek = noop_llseek,
137 };
138
139 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
140         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
141         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
142         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
143         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
144         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
145         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
146         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
147                           DRM_ROOT_ONLY),
148         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
149         DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
150         DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
151         DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
152         DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
153 };
154
155 static struct drm_driver vc4_drm_driver = {
156         .driver_features = (DRIVER_MODESET |
157                             DRIVER_ATOMIC |
158                             DRIVER_GEM |
159                             DRIVER_HAVE_IRQ |
160                             DRIVER_RENDER |
161                             DRIVER_PRIME),
162         .lastclose = vc4_lastclose,
163         .irq_handler = vc4_irq,
164         .irq_preinstall = vc4_irq_preinstall,
165         .irq_postinstall = vc4_irq_postinstall,
166         .irq_uninstall = vc4_irq_uninstall,
167
168         .get_scanout_position = vc4_crtc_get_scanoutpos,
169         .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
170
171 #if defined(CONFIG_DEBUG_FS)
172         .debugfs_init = vc4_debugfs_init,
173 #endif
174
175         .gem_create_object = vc4_create_object,
176         .gem_free_object_unlocked = vc4_free_object,
177         .gem_vm_ops = &vc4_vm_ops,
178
179         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
180         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
181         .gem_prime_import = drm_gem_prime_import,
182         .gem_prime_export = vc4_prime_export,
183         .gem_prime_res_obj = vc4_prime_res_obj,
184         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
185         .gem_prime_import_sg_table = vc4_prime_import_sg_table,
186         .gem_prime_vmap = vc4_prime_vmap,
187         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
188         .gem_prime_mmap = vc4_prime_mmap,
189
190         .dumb_create = vc4_dumb_create,
191
192         .ioctls = vc4_drm_ioctls,
193         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
194         .fops = &vc4_drm_fops,
195
196         .name = DRIVER_NAME,
197         .desc = DRIVER_DESC,
198         .date = DRIVER_DATE,
199         .major = DRIVER_MAJOR,
200         .minor = DRIVER_MINOR,
201         .patchlevel = DRIVER_PATCHLEVEL,
202 };
203
204 static int compare_dev(struct device *dev, void *data)
205 {
206         return dev == data;
207 }
208
209 static void vc4_match_add_drivers(struct device *dev,
210                                   struct component_match **match,
211                                   struct platform_driver *const *drivers,
212                                   int count)
213 {
214         int i;
215
216         for (i = 0; i < count; i++) {
217                 struct device_driver *drv = &drivers[i]->driver;
218                 struct device *p = NULL, *d;
219
220                 while ((d = bus_find_device(&platform_bus_type, p, drv,
221                                             (void *)platform_bus_type.match))) {
222                         put_device(p);
223                         component_match_add(dev, match, compare_dev, d);
224                         p = d;
225                 }
226                 put_device(p);
227         }
228 }
229
230 static void vc4_kick_out_firmware_fb(void)
231 {
232         struct apertures_struct *ap;
233
234         ap = alloc_apertures(1);
235         if (!ap)
236                 return;
237
238         /* Since VC4 is a UMA device, the simplefb node may have been
239          * located anywhere in memory.
240          */
241         ap->ranges[0].base = 0;
242         ap->ranges[0].size = ~0;
243
244         drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false);
245         kfree(ap);
246 }
247
248 static int vc4_drm_bind(struct device *dev)
249 {
250         struct platform_device *pdev = to_platform_device(dev);
251         struct drm_device *drm;
252         struct vc4_dev *vc4;
253         int ret = 0;
254
255         dev->coherent_dma_mask = DMA_BIT_MASK(32);
256
257         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
258         if (!vc4)
259                 return -ENOMEM;
260
261         drm = drm_dev_alloc(&vc4_drm_driver, dev);
262         if (IS_ERR(drm))
263                 return PTR_ERR(drm);
264         platform_set_drvdata(pdev, drm);
265         vc4->dev = drm;
266         drm->dev_private = vc4;
267
268         ret = vc4_bo_cache_init(drm);
269         if (ret)
270                 goto dev_unref;
271
272         drm_mode_config_init(drm);
273
274         vc4_gem_init(drm);
275
276         ret = component_bind_all(dev, drm);
277         if (ret)
278                 goto gem_destroy;
279
280         vc4_kick_out_firmware_fb();
281
282         ret = drm_dev_register(drm, 0);
283         if (ret < 0)
284                 goto unbind_all;
285
286         vc4_kms_load(drm);
287
288         return 0;
289
290 unbind_all:
291         component_unbind_all(dev, drm);
292 gem_destroy:
293         vc4_gem_destroy(drm);
294         vc4_bo_cache_destroy(drm);
295 dev_unref:
296         drm_dev_unref(drm);
297         return ret;
298 }
299
300 static void vc4_drm_unbind(struct device *dev)
301 {
302         struct platform_device *pdev = to_platform_device(dev);
303         struct drm_device *drm = platform_get_drvdata(pdev);
304         struct vc4_dev *vc4 = to_vc4_dev(drm);
305
306         drm_dev_unregister(drm);
307
308         if (vc4->fbdev)
309                 drm_fbdev_cma_fini(vc4->fbdev);
310
311         drm_mode_config_cleanup(drm);
312
313         drm_dev_unref(drm);
314 }
315
316 static const struct component_master_ops vc4_drm_ops = {
317         .bind = vc4_drm_bind,
318         .unbind = vc4_drm_unbind,
319 };
320
321 static struct platform_driver *const component_drivers[] = {
322         &vc4_hdmi_driver,
323         &vc4_vec_driver,
324         &vc4_dpi_driver,
325         &vc4_dsi_driver,
326         &vc4_hvs_driver,
327         &vc4_crtc_driver,
328         &vc4_v3d_driver,
329 };
330
331 static int vc4_platform_drm_probe(struct platform_device *pdev)
332 {
333         struct component_match *match = NULL;
334         struct device *dev = &pdev->dev;
335
336         vc4_match_add_drivers(dev, &match,
337                               component_drivers, ARRAY_SIZE(component_drivers));
338
339         return component_master_add_with_match(dev, &vc4_drm_ops, match);
340 }
341
342 static int vc4_platform_drm_remove(struct platform_device *pdev)
343 {
344         component_master_del(&pdev->dev, &vc4_drm_ops);
345
346         return 0;
347 }
348
349 static const struct of_device_id vc4_of_match[] = {
350         { .compatible = "brcm,bcm2835-vc4", },
351         { .compatible = "brcm,cygnus-vc4", },
352         {},
353 };
354 MODULE_DEVICE_TABLE(of, vc4_of_match);
355
356 static struct platform_driver vc4_platform_driver = {
357         .probe          = vc4_platform_drm_probe,
358         .remove         = vc4_platform_drm_remove,
359         .driver         = {
360                 .name   = "vc4-drm",
361                 .of_match_table = vc4_of_match,
362         },
363 };
364
365 static int __init vc4_drm_register(void)
366 {
367         int ret;
368
369         ret = platform_register_drivers(component_drivers,
370                                         ARRAY_SIZE(component_drivers));
371         if (ret)
372                 return ret;
373
374         return platform_driver_register(&vc4_platform_driver);
375 }
376
377 static void __exit vc4_drm_unregister(void)
378 {
379         platform_unregister_drivers(component_drivers,
380                                     ARRAY_SIZE(component_drivers));
381         platform_driver_unregister(&vc4_platform_driver);
382 }
383
384 module_init(vc4_drm_register);
385 module_exit(vc4_drm_unregister);
386
387 MODULE_ALIAS("platform:vc4-drm");
388 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
389 MODULE_AUTHOR("Eric Anholt <[email protected]>");
390 MODULE_LICENSE("GPL v2");
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