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 * The V3D GPU includes a tiled render (composed of a bin and render
11 * pipelines), the TFU (texture formatting unit), and the CSD (compute
12 * shader dispatch).
13 */
14
15 #include <linux/clk.h>
16 #include <linux/device.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/io.h>
19 #include <linux/module.h>
20 #include <linux/of_platform.h>
21 #include <linux/platform_device.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/reset.h>
24
25 #include <drm/drm_drv.h>
26 #include <drm/drm_fb_cma_helper.h>
27 #include <drm/drm_fb_helper.h>
28 #include <drm/drm_managed.h>
29 #include <uapi/drm/v3d_drm.h>
30
31 #include "v3d_drv.h"
32 #include "v3d_regs.h"
33
34 #define DRIVER_NAME "v3d"
35 #define DRIVER_DESC "Broadcom V3D graphics"
36 #define DRIVER_DATE "20180419"
37 #define DRIVER_MAJOR 1
38 #define DRIVER_MINOR 0
39 #define DRIVER_PATCHLEVEL 0
40
41 #ifdef CONFIG_PM
v3d_runtime_suspend(struct device * dev)42 static int v3d_runtime_suspend(struct device *dev)
43 {
44 struct drm_device *drm = dev_get_drvdata(dev);
45 struct v3d_dev *v3d = to_v3d_dev(drm);
46
47 v3d_irq_disable(v3d);
48
49 clk_disable_unprepare(v3d->clk);
50
51 return 0;
52 }
53
v3d_runtime_resume(struct device * dev)54 static int v3d_runtime_resume(struct device *dev)
55 {
56 struct drm_device *drm = dev_get_drvdata(dev);
57 struct v3d_dev *v3d = to_v3d_dev(drm);
58 int ret;
59
60 ret = clk_prepare_enable(v3d->clk);
61 if (ret != 0)
62 return ret;
63
64 /* XXX: VPM base */
65
66 v3d_mmu_set_page_table(v3d);
67 v3d_irq_enable(v3d);
68
69 return 0;
70 }
71 #endif
72
73 static const struct dev_pm_ops v3d_v3d_pm_ops = {
74 SET_RUNTIME_PM_OPS(v3d_runtime_suspend, v3d_runtime_resume, NULL)
75 };
76
v3d_get_param_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)77 static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
78 struct drm_file *file_priv)
79 {
80 struct v3d_dev *v3d = to_v3d_dev(dev);
81 struct drm_v3d_get_param *args = data;
82 int ret;
83 static const u32 reg_map[] = {
84 [DRM_V3D_PARAM_V3D_UIFCFG] = V3D_HUB_UIFCFG,
85 [DRM_V3D_PARAM_V3D_HUB_IDENT1] = V3D_HUB_IDENT1,
86 [DRM_V3D_PARAM_V3D_HUB_IDENT2] = V3D_HUB_IDENT2,
87 [DRM_V3D_PARAM_V3D_HUB_IDENT3] = V3D_HUB_IDENT3,
88 [DRM_V3D_PARAM_V3D_CORE0_IDENT0] = V3D_CTL_IDENT0,
89 [DRM_V3D_PARAM_V3D_CORE0_IDENT1] = V3D_CTL_IDENT1,
90 [DRM_V3D_PARAM_V3D_CORE0_IDENT2] = V3D_CTL_IDENT2,
91 };
92
93 if (args->pad != 0)
94 return -EINVAL;
95
96 /* Note that DRM_V3D_PARAM_V3D_CORE0_IDENT0 is 0, so we need
97 * to explicitly allow it in the "the register in our
98 * parameter map" check.
99 */
100 if (args->param < ARRAY_SIZE(reg_map) &&
101 (reg_map[args->param] ||
102 args->param == DRM_V3D_PARAM_V3D_CORE0_IDENT0)) {
103 u32 offset = reg_map[args->param];
104
105 if (args->value != 0)
106 return -EINVAL;
107
108 ret = pm_runtime_get_sync(v3d->drm.dev);
109 if (ret < 0)
110 return ret;
111 if (args->param >= DRM_V3D_PARAM_V3D_CORE0_IDENT0 &&
112 args->param <= DRM_V3D_PARAM_V3D_CORE0_IDENT2) {
113 args->value = V3D_CORE_READ(0, offset);
114 } else {
115 args->value = V3D_READ(offset);
116 }
117 pm_runtime_mark_last_busy(v3d->drm.dev);
118 pm_runtime_put_autosuspend(v3d->drm.dev);
119 return 0;
120 }
121
122
123 switch (args->param) {
124 case DRM_V3D_PARAM_SUPPORTS_TFU:
125 args->value = 1;
126 return 0;
127 case DRM_V3D_PARAM_SUPPORTS_CSD:
128 args->value = v3d_has_csd(v3d);
129 return 0;
130 case DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH:
131 args->value = 1;
132 return 0;
133 default:
134 DRM_DEBUG("Unknown parameter %d\n", args->param);
135 return -EINVAL;
136 }
137 }
138
139 static int
v3d_open(struct drm_device * dev,struct drm_file * file)140 v3d_open(struct drm_device *dev, struct drm_file *file)
141 {
142 struct v3d_dev *v3d = to_v3d_dev(dev);
143 struct v3d_file_priv *v3d_priv;
144 struct drm_gpu_scheduler *sched;
145 int i;
146
147 v3d_priv = kzalloc(sizeof(*v3d_priv), GFP_KERNEL);
148 if (!v3d_priv)
149 return -ENOMEM;
150
151 v3d_priv->v3d = v3d;
152
153 for (i = 0; i < V3D_MAX_QUEUES; i++) {
154 sched = &v3d->queue[i].sched;
155 drm_sched_entity_init(&v3d_priv->sched_entity[i],
156 DRM_SCHED_PRIORITY_NORMAL, &sched,
157 1, NULL);
158 }
159
160 file->driver_priv = v3d_priv;
161
162 return 0;
163 }
164
165 static void
v3d_postclose(struct drm_device * dev,struct drm_file * file)166 v3d_postclose(struct drm_device *dev, struct drm_file *file)
167 {
168 struct v3d_file_priv *v3d_priv = file->driver_priv;
169 enum v3d_queue q;
170
171 for (q = 0; q < V3D_MAX_QUEUES; q++) {
172 drm_sched_entity_destroy(&v3d_priv->sched_entity[q]);
173 }
174
175 kfree(v3d_priv);
176 }
177
178 DEFINE_DRM_GEM_FOPS(v3d_drm_fops);
179
180 /* DRM_AUTH is required on SUBMIT_CL for now, while we don't have GMP
181 * protection between clients. Note that render nodes would be be
182 * able to submit CLs that could access BOs from clients authenticated
183 * with the master node. The TFU doesn't use the GMP, so it would
184 * need to stay DRM_AUTH until we do buffer size/offset validation.
185 */
186 static const struct drm_ioctl_desc v3d_drm_ioctls[] = {
187 DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CL, v3d_submit_cl_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
188 DRM_IOCTL_DEF_DRV(V3D_WAIT_BO, v3d_wait_bo_ioctl, DRM_RENDER_ALLOW),
189 DRM_IOCTL_DEF_DRV(V3D_CREATE_BO, v3d_create_bo_ioctl, DRM_RENDER_ALLOW),
190 DRM_IOCTL_DEF_DRV(V3D_MMAP_BO, v3d_mmap_bo_ioctl, DRM_RENDER_ALLOW),
191 DRM_IOCTL_DEF_DRV(V3D_GET_PARAM, v3d_get_param_ioctl, DRM_RENDER_ALLOW),
192 DRM_IOCTL_DEF_DRV(V3D_GET_BO_OFFSET, v3d_get_bo_offset_ioctl, DRM_RENDER_ALLOW),
193 DRM_IOCTL_DEF_DRV(V3D_SUBMIT_TFU, v3d_submit_tfu_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
194 DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CSD, v3d_submit_csd_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
195 };
196
197 static struct drm_driver v3d_drm_driver = {
198 .driver_features = (DRIVER_GEM |
199 DRIVER_RENDER |
200 DRIVER_SYNCOBJ),
201
202 .open = v3d_open,
203 .postclose = v3d_postclose,
204
205 #if defined(CONFIG_DEBUG_FS)
206 .debugfs_init = v3d_debugfs_init,
207 #endif
208
209 .gem_create_object = v3d_create_object,
210 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
211 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
212 .gem_prime_import_sg_table = v3d_prime_import_sg_table,
213 .gem_prime_mmap = drm_gem_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_to_pdev(v3d), IORESOURCE_MEM, name);
239
240 *regs = devm_ioremap_resource(v3d->drm.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 mmu_debug;
251 u32 ident1;
252
253
254 v3d = devm_drm_dev_alloc(dev, &v3d_drm_driver, struct v3d_dev, drm);
255 if (IS_ERR(v3d))
256 return PTR_ERR(v3d);
257
258 drm = &v3d->drm;
259
260 platform_set_drvdata(pdev, drm);
261
262 ret = map_regs(v3d, &v3d->hub_regs, "hub");
263 if (ret)
264 return ret;
265
266 ret = map_regs(v3d, &v3d->core_regs[0], "core0");
267 if (ret)
268 return ret;
269
270 mmu_debug = V3D_READ(V3D_MMU_DEBUG_INFO);
271 dev->coherent_dma_mask =
272 DMA_BIT_MASK(30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_PA_WIDTH));
273 v3d->va_width = 30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_VA_WIDTH);
274
275 ident1 = V3D_READ(V3D_HUB_IDENT1);
276 v3d->ver = (V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_TVER) * 10 +
277 V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_REV));
278 v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
279 WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
280
281 v3d->reset = devm_reset_control_get_exclusive(dev, NULL);
282 if (IS_ERR(v3d->reset)) {
283 ret = PTR_ERR(v3d->reset);
284
285 if (ret == -EPROBE_DEFER)
286 return ret;
287
288 v3d->reset = NULL;
289 ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
290 if (ret) {
291 dev_err(dev,
292 "Failed to get reset control or bridge regs\n");
293 return ret;
294 }
295 }
296
297 if (v3d->ver < 41) {
298 ret = map_regs(v3d, &v3d->gca_regs, "gca");
299 if (ret)
300 return ret;
301 }
302
303 v3d->mmu_scratch = dma_alloc_wc(dev, 4096, &v3d->mmu_scratch_paddr,
304 GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
305 if (!v3d->mmu_scratch) {
306 dev_err(dev, "Failed to allocate MMU scratch page\n");
307 return -ENOMEM;
308 }
309
310 pm_runtime_use_autosuspend(dev);
311 pm_runtime_set_autosuspend_delay(dev, 50);
312 pm_runtime_enable(dev);
313
314 ret = v3d_gem_init(drm);
315 if (ret)
316 goto dma_free;
317
318 ret = v3d_irq_init(v3d);
319 if (ret)
320 goto gem_destroy;
321
322 ret = drm_dev_register(drm, 0);
323 if (ret)
324 goto irq_disable;
325
326 return 0;
327
328 irq_disable:
329 v3d_irq_disable(v3d);
330 gem_destroy:
331 v3d_gem_destroy(drm);
332 dma_free:
333 dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
334 return ret;
335 }
336
v3d_platform_drm_remove(struct platform_device * pdev)337 static int v3d_platform_drm_remove(struct platform_device *pdev)
338 {
339 struct drm_device *drm = platform_get_drvdata(pdev);
340 struct v3d_dev *v3d = to_v3d_dev(drm);
341
342 drm_dev_unregister(drm);
343
344 v3d_gem_destroy(drm);
345
346 dma_free_wc(v3d->drm.dev, 4096, v3d->mmu_scratch,
347 v3d->mmu_scratch_paddr);
348
349 return 0;
350 }
351
352 static struct platform_driver v3d_platform_driver = {
353 .probe = v3d_platform_drm_probe,
354 .remove = v3d_platform_drm_remove,
355 .driver = {
356 .name = "v3d",
357 .of_match_table = v3d_of_match,
358 },
359 };
360
361 module_platform_driver(v3d_platform_driver);
362
363 MODULE_ALIAS("platform:v3d-drm");
364 MODULE_DESCRIPTION("Broadcom V3D DRM Driver");
365 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
366 MODULE_LICENSE("GPL v2");
367
