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13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/fb.h>
16#include <linux/dma-buf.h>
17#include <linux/mem_encrypt.h>
18
19#include <drm/drmP.h>
20#include <drm/drm_crtc.h>
21#include <drm/drm_crtc_helper.h>
22#include "udl_drv.h"
23
24#include <drm/drm_fb_helper.h>
25
26#define DL_DEFIO_WRITE_DELAY (HZ/20)
27
28static int fb_defio = 0;
29static int fb_bpp = 16;
30
31module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
32module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
33
34struct udl_fbdev {
35 struct drm_fb_helper helper;
36 struct udl_framebuffer ufb;
37 int fb_count;
38};
39
40#define DL_ALIGN_UP(x, a) ALIGN(x, a)
41#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
42
43
44#define DLO_RGB_GETRED(col) (uint8_t)((col) & 0xFF)
45
46
47#define DLO_RGB_GETGRN(col) (uint8_t)(((col) >> 8) & 0xFF)
48
49
50#define DLO_RGB_GETBLU(col) (uint8_t)(((col) >> 16) & 0xFF)
51
52
53#define DLO_RG16(red, grn) (uint8_t)((((red) & 0xF8) | ((grn) >> 5)) & 0xFF)
54
55
56#define DLO_GB16(grn, blu) (uint8_t)(((((grn) & 0x1C) << 3) | ((blu) >> 3)) & 0xFF)
57
58
59#define DLO_RGB8(red, grn, blu) ((((red) << 5) | (((grn) & 3) << 3) | ((blu) & 7)) & 0xFF)
60
61#if 0
62static uint8_t rgb8(uint32_t col)
63{
64 uint8_t red = DLO_RGB_GETRED(col);
65 uint8_t grn = DLO_RGB_GETGRN(col);
66 uint8_t blu = DLO_RGB_GETBLU(col);
67
68 return DLO_RGB8(red, grn, blu);
69}
70
71static uint16_t rgb16(uint32_t col)
72{
73 uint8_t red = DLO_RGB_GETRED(col);
74 uint8_t grn = DLO_RGB_GETGRN(col);
75 uint8_t blu = DLO_RGB_GETBLU(col);
76
77 return (DLO_RG16(red, grn) << 8) + DLO_GB16(grn, blu);
78}
79#endif
80
81int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
82 int width, int height)
83{
84 struct drm_device *dev = fb->base.dev;
85 struct udl_device *udl = dev->dev_private;
86 int i, ret;
87 char *cmd;
88 cycles_t start_cycles, end_cycles;
89 int bytes_sent = 0;
90 int bytes_identical = 0;
91 struct urb *urb;
92 int aligned_x;
93 int log_bpp;
94
95 BUG_ON(!is_power_of_2(fb->base.format->cpp[0]));
96 log_bpp = __ffs(fb->base.format->cpp[0]);
97
98 if (!fb->active_16)
99 return 0;
100
101 if (!fb->obj->vmapping) {
102 ret = udl_gem_vmap(fb->obj);
103 if (ret == -ENOMEM) {
104 DRM_ERROR("failed to vmap fb\n");
105 return 0;
106 }
107 if (!fb->obj->vmapping) {
108 DRM_ERROR("failed to vmapping\n");
109 return 0;
110 }
111 }
112
113 aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long));
114 width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long));
115 x = aligned_x;
116
117 if ((width <= 0) ||
118 (x + width > fb->base.width) ||
119 (y + height > fb->base.height))
120 return -EINVAL;
121
122 start_cycles = get_cycles();
123
124 urb = udl_get_urb(dev);
125 if (!urb)
126 return 0;
127 cmd = urb->transfer_buffer;
128
129 for (i = y; i < y + height ; i++) {
130 const int line_offset = fb->base.pitches[0] * i;
131 const int byte_offset = line_offset + (x << log_bpp);
132 const int dev_byte_offset = (fb->base.width * i + x) << log_bpp;
133 if (udl_render_hline(dev, log_bpp, &urb,
134 (char *) fb->obj->vmapping,
135 &cmd, byte_offset, dev_byte_offset,
136 width << log_bpp,
137 &bytes_identical, &bytes_sent))
138 goto error;
139 }
140
141 if (cmd > (char *) urb->transfer_buffer) {
142
143 int len;
144 if (cmd < (char *) urb->transfer_buffer + urb->transfer_buffer_length)
145 *cmd++ = 0xAF;
146 len = cmd - (char *) urb->transfer_buffer;
147 ret = udl_submit_urb(dev, urb, len);
148 bytes_sent += len;
149 } else
150 udl_urb_completion(urb);
151
152error:
153 atomic_add(bytes_sent, &udl->bytes_sent);
154 atomic_add(bytes_identical, &udl->bytes_identical);
155 atomic_add((width * height) << log_bpp, &udl->bytes_rendered);
156 end_cycles = get_cycles();
157 atomic_add(((unsigned int) ((end_cycles - start_cycles)
158 >> 10)),
159 &udl->cpu_kcycles_used);
160
161 return 0;
162}
163
164static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
165{
166 unsigned long start = vma->vm_start;
167 unsigned long size = vma->vm_end - vma->vm_start;
168 unsigned long offset;
169 unsigned long page, pos;
170
171 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
172 return -EINVAL;
173
174 offset = vma->vm_pgoff << PAGE_SHIFT;
175
176 if (offset > info->fix.smem_len || size > info->fix.smem_len - offset)
177 return -EINVAL;
178
179 pos = (unsigned long)info->fix.smem_start + offset;
180
181 pr_debug("mmap() framebuffer addr:%lu size:%lu\n",
182 pos, size);
183
184
185 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
186
187 while (size > 0) {
188 page = vmalloc_to_pfn((void *)pos);
189 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
190 return -EAGAIN;
191
192 start += PAGE_SIZE;
193 pos += PAGE_SIZE;
194 if (size > PAGE_SIZE)
195 size -= PAGE_SIZE;
196 else
197 size = 0;
198 }
199
200
201 return 0;
202}
203
204
205
206
207
208
209static int udl_fb_open(struct fb_info *info, int user)
210{
211 struct udl_fbdev *ufbdev = info->par;
212 struct drm_device *dev = ufbdev->ufb.base.dev;
213 struct udl_device *udl = dev->dev_private;
214
215
216 if (drm_dev_is_unplugged(udl->ddev))
217 return -ENODEV;
218
219 ufbdev->fb_count++;
220
221#ifdef CONFIG_DRM_FBDEV_EMULATION
222 if (fb_defio && (info->fbdefio == NULL)) {
223
224
225 struct fb_deferred_io *fbdefio;
226
227 fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
228
229 if (fbdefio) {
230 fbdefio->delay = DL_DEFIO_WRITE_DELAY;
231 fbdefio->deferred_io = drm_fb_helper_deferred_io;
232 }
233
234 info->fbdefio = fbdefio;
235 fb_deferred_io_init(info);
236 }
237#endif
238
239 pr_debug("open /dev/fb%d user=%d fb_info=%p count=%d\n",
240 info->node, user, info, ufbdev->fb_count);
241
242 return 0;
243}
244
245
246
247
248
249static int udl_fb_release(struct fb_info *info, int user)
250{
251 struct udl_fbdev *ufbdev = info->par;
252
253 ufbdev->fb_count--;
254
255#ifdef CONFIG_DRM_FBDEV_EMULATION
256 if ((ufbdev->fb_count == 0) && (info->fbdefio)) {
257 fb_deferred_io_cleanup(info);
258 kfree(info->fbdefio);
259 info->fbdefio = NULL;
260 info->fbops->fb_mmap = udl_fb_mmap;
261 }
262#endif
263
264 pr_debug("released /dev/fb%d user=%d count=%d\n",
265 info->node, user, ufbdev->fb_count);
266
267 return 0;
268}
269
270static struct fb_ops udlfb_ops = {
271 .owner = THIS_MODULE,
272 DRM_FB_HELPER_DEFAULT_OPS,
273 .fb_fillrect = drm_fb_helper_sys_fillrect,
274 .fb_copyarea = drm_fb_helper_sys_copyarea,
275 .fb_imageblit = drm_fb_helper_sys_imageblit,
276 .fb_mmap = udl_fb_mmap,
277 .fb_open = udl_fb_open,
278 .fb_release = udl_fb_release,
279};
280
281static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb,
282 struct drm_file *file,
283 unsigned flags, unsigned color,
284 struct drm_clip_rect *clips,
285 unsigned num_clips)
286{
287 struct udl_framebuffer *ufb = to_udl_fb(fb);
288 int i;
289 int ret = 0;
290
291 drm_modeset_lock_all(fb->dev);
292
293 if (!ufb->active_16)
294 goto unlock;
295
296 if (ufb->obj->base.import_attach) {
297 ret = dma_buf_begin_cpu_access(ufb->obj->base.import_attach->dmabuf,
298 DMA_FROM_DEVICE);
299 if (ret)
300 goto unlock;
301 }
302
303 for (i = 0; i < num_clips; i++) {
304 ret = udl_handle_damage(ufb, clips[i].x1, clips[i].y1,
305 clips[i].x2 - clips[i].x1,
306 clips[i].y2 - clips[i].y1);
307 if (ret)
308 break;
309 }
310
311 if (ufb->obj->base.import_attach) {
312 ret = dma_buf_end_cpu_access(ufb->obj->base.import_attach->dmabuf,
313 DMA_FROM_DEVICE);
314 }
315
316 unlock:
317 drm_modeset_unlock_all(fb->dev);
318
319 return ret;
320}
321
322static void udl_user_framebuffer_destroy(struct drm_framebuffer *fb)
323{
324 struct udl_framebuffer *ufb = to_udl_fb(fb);
325
326 if (ufb->obj)
327 drm_gem_object_put_unlocked(&ufb->obj->base);
328
329 drm_framebuffer_cleanup(fb);
330 kfree(ufb);
331}
332
333static const struct drm_framebuffer_funcs udlfb_funcs = {
334 .destroy = udl_user_framebuffer_destroy,
335 .dirty = udl_user_framebuffer_dirty,
336};
337
338
339static int
340udl_framebuffer_init(struct drm_device *dev,
341 struct udl_framebuffer *ufb,
342 const struct drm_mode_fb_cmd2 *mode_cmd,
343 struct udl_gem_object *obj)
344{
345 int ret;
346
347 ufb->obj = obj;
348 drm_helper_mode_fill_fb_struct(dev, &ufb->base, mode_cmd);
349 ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
350 return ret;
351}
352
353
354static int udlfb_create(struct drm_fb_helper *helper,
355 struct drm_fb_helper_surface_size *sizes)
356{
357 struct udl_fbdev *ufbdev =
358 container_of(helper, struct udl_fbdev, helper);
359 struct drm_device *dev = ufbdev->helper.dev;
360 struct fb_info *info;
361 struct drm_framebuffer *fb;
362 struct drm_mode_fb_cmd2 mode_cmd;
363 struct udl_gem_object *obj;
364 uint32_t size;
365 int ret = 0;
366
367 if (sizes->surface_bpp == 24)
368 sizes->surface_bpp = 32;
369
370 mode_cmd.width = sizes->surface_width;
371 mode_cmd.height = sizes->surface_height;
372 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
373
374 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
375 sizes->surface_depth);
376
377 size = mode_cmd.pitches[0] * mode_cmd.height;
378 size = ALIGN(size, PAGE_SIZE);
379
380 obj = udl_gem_alloc_object(dev, size);
381 if (!obj)
382 goto out;
383
384 ret = udl_gem_vmap(obj);
385 if (ret) {
386 DRM_ERROR("failed to vmap fb\n");
387 goto out_gfree;
388 }
389
390 info = drm_fb_helper_alloc_fbi(helper);
391 if (IS_ERR(info)) {
392 ret = PTR_ERR(info);
393 goto out_gfree;
394 }
395 info->par = ufbdev;
396
397 ret = udl_framebuffer_init(dev, &ufbdev->ufb, &mode_cmd, obj);
398 if (ret)
399 goto out_gfree;
400
401 fb = &ufbdev->ufb.base;
402
403 ufbdev->helper.fb = fb;
404
405 strcpy(info->fix.id, "udldrmfb");
406
407 info->screen_base = ufbdev->ufb.obj->vmapping;
408 info->fix.smem_len = size;
409 info->fix.smem_start = (unsigned long)ufbdev->ufb.obj->vmapping;
410
411 info->fbops = &udlfb_ops;
412 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
413 drm_fb_helper_fill_var(info, &ufbdev->helper, sizes->fb_width, sizes->fb_height);
414
415 DRM_DEBUG_KMS("allocated %dx%d vmal %p\n",
416 fb->width, fb->height,
417 ufbdev->ufb.obj->vmapping);
418
419 return ret;
420out_gfree:
421 drm_gem_object_put_unlocked(&ufbdev->ufb.obj->base);
422out:
423 return ret;
424}
425
426static const struct drm_fb_helper_funcs udl_fb_helper_funcs = {
427 .fb_probe = udlfb_create,
428};
429
430static void udl_fbdev_destroy(struct drm_device *dev,
431 struct udl_fbdev *ufbdev)
432{
433 drm_fb_helper_unregister_fbi(&ufbdev->helper);
434 drm_fb_helper_fini(&ufbdev->helper);
435 if (ufbdev->ufb.obj) {
436 drm_framebuffer_unregister_private(&ufbdev->ufb.base);
437 drm_framebuffer_cleanup(&ufbdev->ufb.base);
438 drm_gem_object_put_unlocked(&ufbdev->ufb.obj->base);
439 }
440}
441
442int udl_fbdev_init(struct drm_device *dev)
443{
444 struct udl_device *udl = dev->dev_private;
445 int bpp_sel = fb_bpp;
446 struct udl_fbdev *ufbdev;
447 int ret;
448
449 ufbdev = kzalloc(sizeof(struct udl_fbdev), GFP_KERNEL);
450 if (!ufbdev)
451 return -ENOMEM;
452
453 udl->fbdev = ufbdev;
454
455 drm_fb_helper_prepare(dev, &ufbdev->helper, &udl_fb_helper_funcs);
456
457 ret = drm_fb_helper_init(dev, &ufbdev->helper, 1);
458 if (ret)
459 goto free;
460
461 ret = drm_fb_helper_single_add_all_connectors(&ufbdev->helper);
462 if (ret)
463 goto fini;
464
465
466 drm_helper_disable_unused_functions(dev);
467
468 ret = drm_fb_helper_initial_config(&ufbdev->helper, bpp_sel);
469 if (ret)
470 goto fini;
471
472 return 0;
473
474fini:
475 drm_fb_helper_fini(&ufbdev->helper);
476free:
477 kfree(ufbdev);
478 return ret;
479}
480
481void udl_fbdev_cleanup(struct drm_device *dev)
482{
483 struct udl_device *udl = dev->dev_private;
484 if (!udl->fbdev)
485 return;
486
487 udl_fbdev_destroy(dev, udl->fbdev);
488 kfree(udl->fbdev);
489 udl->fbdev = NULL;
490}
491
492void udl_fbdev_unplug(struct drm_device *dev)
493{
494 struct udl_device *udl = dev->dev_private;
495 struct udl_fbdev *ufbdev;
496 if (!udl->fbdev)
497 return;
498
499 ufbdev = udl->fbdev;
500 drm_fb_helper_unlink_fbi(&ufbdev->helper);
501}
502
503struct drm_framebuffer *
504udl_fb_user_fb_create(struct drm_device *dev,
505 struct drm_file *file,
506 const struct drm_mode_fb_cmd2 *mode_cmd)
507{
508 struct drm_gem_object *obj;
509 struct udl_framebuffer *ufb;
510 int ret;
511 uint32_t size;
512
513 obj = drm_gem_object_lookup(file, mode_cmd->handles[0]);
514 if (obj == NULL)
515 return ERR_PTR(-ENOENT);
516
517 size = mode_cmd->pitches[0] * mode_cmd->height;
518 size = ALIGN(size, PAGE_SIZE);
519
520 if (size > obj->size) {
521 DRM_ERROR("object size not sufficient for fb %d %zu %d %d\n", size, obj->size, mode_cmd->pitches[0], mode_cmd->height);
522 return ERR_PTR(-ENOMEM);
523 }
524
525 ufb = kzalloc(sizeof(*ufb), GFP_KERNEL);
526 if (ufb == NULL)
527 return ERR_PTR(-ENOMEM);
528
529 ret = udl_framebuffer_init(dev, ufb, mode_cmd, to_udl_bo(obj));
530 if (ret) {
531 kfree(ufb);
532 return ERR_PTR(-EINVAL);
533 }
534 return &ufb->base;
535}
536
