1 // SPDX-License-Identifier: GPL-2.0+
2 /* Copyright (C) 2014-2018 Broadcom */
3
4 /**
5 * DOC: Broadcom V3D Graphics Driver
6 *
7 * This driver supports the Broadcom V3D 3.3 and 4.1 OpenGL ES GPUs.
8 * For V3D 2.x support, see the VC4 driver.
9 *
10 * Currently only single-core rendering using the binner and renderer
11 * is supported. The TFU (texture formatting unit) and V3D 4.x's CSD
12 * (compute shader dispatch) are not yet supported.
13 */
14
15 #include <linux/clk.h>
16 #include <linux/device.h>
17 #include <linux/io.h>
18 #include <linux/module.h>
19 #include <linux/of_platform.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <drm/drm_fb_cma_helper.h>
23 #include <drm/drm_fb_helper.h>
24
25 #include "uapi/drm/v3d_drm.h"
26 #include "v3d_drv.h"
27 #include "v3d_regs.h"
28
29 #define DRIVER_NAME "v3d"
30 #define DRIVER_DESC "Broadcom V3D graphics"
31 #define DRIVER_DATE "20180419"
32 #define DRIVER_MAJOR 1
33 #define DRIVER_MINOR 0
34 #define DRIVER_PATCHLEVEL 0
35
36 #ifdef CONFIG_PM
v3d_runtime_suspend(struct device * dev)37 static int v3d_runtime_suspend(struct device *dev)
38 {
39 struct drm_device *drm = dev_get_drvdata(dev);
40 struct v3d_dev *v3d = to_v3d_dev(drm);
41
42 v3d_irq_disable(v3d);
43
44 clk_disable_unprepare(v3d->clk);
45
46 return 0;
47 }
48
v3d_runtime_resume(struct device * dev)49 static int v3d_runtime_resume(struct device *dev)
50 {
51 struct drm_device *drm = dev_get_drvdata(dev);
52 struct v3d_dev *v3d = to_v3d_dev(drm);
53 int ret;
54
55 ret = clk_prepare_enable(v3d->clk);
56 if (ret != 0)
57 return ret;
58
59 /* XXX: VPM base */
60
61 v3d_mmu_set_page_table(v3d);
62 v3d_irq_enable(v3d);
63
64 return 0;
65 }
66 #endif
67
68 static const struct dev_pm_ops v3d_v3d_pm_ops = {
69 SET_RUNTIME_PM_OPS(v3d_runtime_suspend, v3d_runtime_resume, NULL)
70 };
71
v3d_get_param_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)72 static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
73 struct drm_file *file_priv)
74 {
75 struct v3d_dev *v3d = to_v3d_dev(dev);
76 struct drm_v3d_get_param *args = data;
77 int ret;
78 static const u32 reg_map[] = {
79 [DRM_V3D_PARAM_V3D_UIFCFG] = V3D_HUB_UIFCFG,
80 [DRM_V3D_PARAM_V3D_HUB_IDENT1] = V3D_HUB_IDENT1,
81 [DRM_V3D_PARAM_V3D_HUB_IDENT2] = V3D_HUB_IDENT2,
82 [DRM_V3D_PARAM_V3D_HUB_IDENT3] = V3D_HUB_IDENT3,
83 [DRM_V3D_PARAM_V3D_CORE0_IDENT0] = V3D_CTL_IDENT0,
84 [DRM_V3D_PARAM_V3D_CORE0_IDENT1] = V3D_CTL_IDENT1,
85 [DRM_V3D_PARAM_V3D_CORE0_IDENT2] = V3D_CTL_IDENT2,
86 };
87
88 if (args->pad != 0)
89 return -EINVAL;
90
91 /* Note that DRM_V3D_PARAM_V3D_CORE0_IDENT0 is 0, so we need
92 * to explicitly allow it in the "the register in our
93 * parameter map" check.
94 */
95 if (args->param < ARRAY_SIZE(reg_map) &&
96 (reg_map[args->param] ||
97 args->param == DRM_V3D_PARAM_V3D_CORE0_IDENT0)) {
98 u32 offset = reg_map[args->param];
99
100 if (args->value != 0)
101 return -EINVAL;
102
103 ret = pm_runtime_get_sync(v3d->dev);
104 if (args->param >= DRM_V3D_PARAM_V3D_CORE0_IDENT0 &&
105 args->param <= DRM_V3D_PARAM_V3D_CORE0_IDENT2) {
106 args->value = V3D_CORE_READ(0, offset);
107 } else {
108 args->value = V3D_READ(offset);
109 }
110 pm_runtime_mark_last_busy(v3d->dev);
111 pm_runtime_put_autosuspend(v3d->dev);
112 return 0;
113 }
114
115 /* Any params that aren't just register reads would go here. */
116
117 DRM_DEBUG("Unknown parameter %d\n", args->param);
118 return -EINVAL;
119 }
120
121 static int
v3d_open(struct drm_device * dev,struct drm_file * file)122 v3d_open(struct drm_device *dev, struct drm_file *file)
123 {
124 struct v3d_dev *v3d = to_v3d_dev(dev);
125 struct v3d_file_priv *v3d_priv;
126 struct drm_sched_rq *rq;
127 int i;
128
129 v3d_priv = kzalloc(sizeof(*v3d_priv), GFP_KERNEL);
130 if (!v3d_priv)
131 return -ENOMEM;
132
133 v3d_priv->v3d = v3d;
134
135 for (i = 0; i < V3D_MAX_QUEUES; i++) {
136 rq = &v3d->queue[i].sched.sched_rq[DRM_SCHED_PRIORITY_NORMAL];
137 drm_sched_entity_init(&v3d_priv->sched_entity[i], &rq, 1, NULL);
138 }
139
140 file->driver_priv = v3d_priv;
141
142 return 0;
143 }
144
145 static void
v3d_postclose(struct drm_device * dev,struct drm_file * file)146 v3d_postclose(struct drm_device *dev, struct drm_file *file)
147 {
148 struct v3d_file_priv *v3d_priv = file->driver_priv;
149 enum v3d_queue q;
150
151 for (q = 0; q < V3D_MAX_QUEUES; q++) {
152 drm_sched_entity_destroy(&v3d_priv->sched_entity[q]);
153 }
154
155 kfree(v3d_priv);
156 }
157
158 static const struct file_operations v3d_drm_fops = {
159 .owner = THIS_MODULE,
160 .open = drm_open,
161 .release = drm_release,
162 .unlocked_ioctl = drm_ioctl,
163 .mmap = v3d_mmap,
164 .poll = drm_poll,
165 .read = drm_read,
166 .compat_ioctl = drm_compat_ioctl,
167 .llseek = noop_llseek,
168 };
169
170 /* DRM_AUTH is required on SUBMIT_CL for now, while we don't have GMP
171 * protection between clients. Note that render nodes would be be
172 * able to submit CLs that could access BOs from clients authenticated
173 * with the master node.
174 */
175 static const struct drm_ioctl_desc v3d_drm_ioctls[] = {
176 DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CL, v3d_submit_cl_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
177 DRM_IOCTL_DEF_DRV(V3D_WAIT_BO, v3d_wait_bo_ioctl, DRM_RENDER_ALLOW),
178 DRM_IOCTL_DEF_DRV(V3D_CREATE_BO, v3d_create_bo_ioctl, DRM_RENDER_ALLOW),
179 DRM_IOCTL_DEF_DRV(V3D_MMAP_BO, v3d_mmap_bo_ioctl, DRM_RENDER_ALLOW),
180 DRM_IOCTL_DEF_DRV(V3D_GET_PARAM, v3d_get_param_ioctl, DRM_RENDER_ALLOW),
181 DRM_IOCTL_DEF_DRV(V3D_GET_BO_OFFSET, v3d_get_bo_offset_ioctl, DRM_RENDER_ALLOW),
182 };
183
184 static const struct vm_operations_struct v3d_vm_ops = {
185 .fault = v3d_gem_fault,
186 .open = drm_gem_vm_open,
187 .close = drm_gem_vm_close,
188 };
189
190 static struct drm_driver v3d_drm_driver = {
191 .driver_features = (DRIVER_GEM |
192 DRIVER_RENDER |
193 DRIVER_PRIME |
194 DRIVER_SYNCOBJ),
195
196 .open = v3d_open,
197 .postclose = v3d_postclose,
198
199 #if defined(CONFIG_DEBUG_FS)
200 .debugfs_init = v3d_debugfs_init,
201 #endif
202
203 .gem_free_object_unlocked = v3d_free_object,
204 .gem_vm_ops = &v3d_vm_ops,
205
206 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
207 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
208 .gem_prime_import = drm_gem_prime_import,
209 .gem_prime_export = drm_gem_prime_export,
210 .gem_prime_res_obj = v3d_prime_res_obj,
211 .gem_prime_get_sg_table = v3d_prime_get_sg_table,
212 .gem_prime_import_sg_table = v3d_prime_import_sg_table,
213 .gem_prime_mmap = v3d_prime_mmap,
214
215 .ioctls = v3d_drm_ioctls,
216 .num_ioctls = ARRAY_SIZE(v3d_drm_ioctls),
217 .fops = &v3d_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
227 static const struct of_device_id v3d_of_match[] = {
228 { .compatible = "brcm,7268-v3d" },
229 { .compatible = "brcm,7278-v3d" },
230 {},
231 };
232 MODULE_DEVICE_TABLE(of, v3d_of_match);
233
234 static int
map_regs(struct v3d_dev * v3d,void __iomem ** regs,const char * name)235 map_regs(struct v3d_dev *v3d, void __iomem **regs, const char *name)
236 {
237 struct resource *res =
238 platform_get_resource_byname(v3d->pdev, IORESOURCE_MEM, name);
239
240 *regs = devm_ioremap_resource(v3d->dev, res);
241 return PTR_ERR_OR_ZERO(*regs);
242 }
243
v3d_platform_drm_probe(struct platform_device * pdev)244 static int v3d_platform_drm_probe(struct platform_device *pdev)
245 {
246 struct device *dev = &pdev->dev;
247 struct drm_device *drm;
248 struct v3d_dev *v3d;
249 int ret;
250 u32 ident1;
251
252 dev->coherent_dma_mask = DMA_BIT_MASK(36);
253
254 v3d = kzalloc(sizeof(*v3d), GFP_KERNEL);
255 if (!v3d)
256 return -ENOMEM;
257 v3d->dev = dev;
258 v3d->pdev = pdev;
259 drm = &v3d->drm;
260
261 ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
262 if (ret)
263 goto dev_free;
264
265 ret = map_regs(v3d, &v3d->hub_regs, "hub");
266 if (ret)
267 goto dev_free;
268
269 ret = map_regs(v3d, &v3d->core_regs[0], "core0");
270 if (ret)
271 goto dev_free;
272
273 ident1 = V3D_READ(V3D_HUB_IDENT1);
274 v3d->ver = (V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_TVER) * 10 +
275 V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_REV));
276 v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
277 WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
278
279 if (v3d->ver < 41) {
280 ret = map_regs(v3d, &v3d->gca_regs, "gca");
281 if (ret)
282 goto dev_free;
283 }
284
285 v3d->mmu_scratch = dma_alloc_wc(dev, 4096, &v3d->mmu_scratch_paddr,
286 GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
287 if (!v3d->mmu_scratch) {
288 dev_err(dev, "Failed to allocate MMU scratch page\n");
289 ret = -ENOMEM;
290 goto dev_free;
291 }
292
293 pm_runtime_use_autosuspend(dev);
294 pm_runtime_set_autosuspend_delay(dev, 50);
295 pm_runtime_enable(dev);
296
297 ret = drm_dev_init(&v3d->drm, &v3d_drm_driver, dev);
298 if (ret)
299 goto dma_free;
300
301 platform_set_drvdata(pdev, drm);
302 drm->dev_private = v3d;
303
304 ret = v3d_gem_init(drm);
305 if (ret)
306 goto dev_destroy;
307
308 v3d_irq_init(v3d);
309
310 ret = drm_dev_register(drm, 0);
311 if (ret)
312 goto gem_destroy;
313
314 return 0;
315
316 gem_destroy:
317 v3d_gem_destroy(drm);
318 dev_destroy:
319 drm_dev_put(drm);
320 dma_free:
321 dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
322 dev_free:
323 kfree(v3d);
324 return ret;
325 }
326
v3d_platform_drm_remove(struct platform_device * pdev)327 static int v3d_platform_drm_remove(struct platform_device *pdev)
328 {
329 struct drm_device *drm = platform_get_drvdata(pdev);
330 struct v3d_dev *v3d = to_v3d_dev(drm);
331
332 drm_dev_unregister(drm);
333
334 v3d_gem_destroy(drm);
335
336 drm_dev_put(drm);
337
338 dma_free_wc(v3d->dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
339
340 return 0;
341 }
342
343 static struct platform_driver v3d_platform_driver = {
344 .probe = v3d_platform_drm_probe,
345 .remove = v3d_platform_drm_remove,
346 .driver = {
347 .name = "v3d",
348 .of_match_table = v3d_of_match,
349 },
350 };
351
v3d_drm_register(void)352 static int __init v3d_drm_register(void)
353 {
354 return platform_driver_register(&v3d_platform_driver);
355 }
356
v3d_drm_unregister(void)357 static void __exit v3d_drm_unregister(void)
358 {
359 platform_driver_unregister(&v3d_platform_driver);
360 }
361
362 module_init(v3d_drm_register);
363 module_exit(v3d_drm_unregister);
364
365 MODULE_ALIAS("platform:v3d-drm");
366 MODULE_DESCRIPTION("Broadcom V3D DRM Driver");
367 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
368 MODULE_LICENSE("GPL v2");
369
