1
2
3
4
5
6
7
8
9
10
11
12
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/fb.h>
16#include <linux/dma-buf.h>
17
18#include <drm/drmP.h>
19#include <drm/drm_crtc.h>
20#include <drm/drm_crtc_helper.h>
21#include "udl_drv.h"
22
23#include <drm/drm_fb_helper.h>
24
25#define DL_DEFIO_WRITE_DELAY (HZ/20)
26
27static int fb_defio = 0;
28static int fb_bpp = 16;
29
30module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
31module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
32
33struct udl_fbdev {
34 struct drm_fb_helper helper;
35 struct udl_framebuffer ufb;
36 struct list_head fbdev_list;
37 int fb_count;
38};
39
40#define DL_ALIGN_UP(x, a) ALIGN(x, a)
41#define DL_ALIGN_DOWN(x, a) ALIGN(x-(a-1), 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
81
82
83
84
85
86
87static void udlfb_dpy_deferred_io(struct fb_info *info,
88 struct list_head *pagelist)
89{
90 struct page *cur;
91 struct fb_deferred_io *fbdefio = info->fbdefio;
92 struct udl_fbdev *ufbdev = info->par;
93 struct drm_device *dev = ufbdev->ufb.base.dev;
94 struct udl_device *udl = dev->dev_private;
95 struct urb *urb;
96 char *cmd;
97 cycles_t start_cycles, end_cycles;
98 int bytes_sent = 0;
99 int bytes_identical = 0;
100 int bytes_rendered = 0;
101
102 if (!fb_defio)
103 return;
104
105 start_cycles = get_cycles();
106
107 urb = udl_get_urb(dev);
108 if (!urb)
109 return;
110
111 cmd = urb->transfer_buffer;
112
113
114 list_for_each_entry(cur, &fbdefio->pagelist, lru) {
115
116 if (udl_render_hline(dev, (ufbdev->ufb.base.bits_per_pixel / 8),
117 &urb, (char *) info->fix.smem_start,
118 &cmd, cur->index << PAGE_SHIFT,
119 cur->index << PAGE_SHIFT,
120 PAGE_SIZE, &bytes_identical, &bytes_sent))
121 goto error;
122 bytes_rendered += PAGE_SIZE;
123 }
124
125 if (cmd > (char *) urb->transfer_buffer) {
126
127 int len = cmd - (char *) urb->transfer_buffer;
128 udl_submit_urb(dev, urb, len);
129 bytes_sent += len;
130 } else
131 udl_urb_completion(urb);
132
133error:
134 atomic_add(bytes_sent, &udl->bytes_sent);
135 atomic_add(bytes_identical, &udl->bytes_identical);
136 atomic_add(bytes_rendered, &udl->bytes_rendered);
137 end_cycles = get_cycles();
138 atomic_add(((unsigned int) ((end_cycles - start_cycles)
139 >> 10)),
140 &udl->cpu_kcycles_used);
141}
142
143int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
144 int width, int height)
145{
146 struct drm_device *dev = fb->base.dev;
147 struct udl_device *udl = dev->dev_private;
148 int i, ret;
149 char *cmd;
150 cycles_t start_cycles, end_cycles;
151 int bytes_sent = 0;
152 int bytes_identical = 0;
153 struct urb *urb;
154 int aligned_x;
155 int bpp = (fb->base.bits_per_pixel / 8);
156 int x2, y2;
157 bool store_for_later = false;
158 unsigned long flags;
159
160 if (!fb->active_16)
161 return 0;
162
163 if (!fb->obj->vmapping) {
164 ret = udl_gem_vmap(fb->obj);
165 if (ret == -ENOMEM) {
166 DRM_ERROR("failed to vmap fb\n");
167 return 0;
168 }
169 if (!fb->obj->vmapping) {
170 DRM_ERROR("failed to vmapping\n");
171 return 0;
172 }
173 }
174
175 aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long));
176 width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long));
177 x = aligned_x;
178
179 if ((width <= 0) ||
180 (x + width > fb->base.width) ||
181 (y + height > fb->base.height))
182 return -EINVAL;
183
184
185
186 if (in_atomic())
187 store_for_later = true;
188
189 x2 = x + width - 1;
190 y2 = y + height - 1;
191
192 spin_lock_irqsave(&fb->dirty_lock, flags);
193
194 if (fb->y1 < y)
195 y = fb->y1;
196 if (fb->y2 > y2)
197 y2 = fb->y2;
198 if (fb->x1 < x)
199 x = fb->x1;
200 if (fb->x2 > x2)
201 x2 = fb->x2;
202
203 if (store_for_later) {
204 fb->x1 = x;
205 fb->x2 = x2;
206 fb->y1 = y;
207 fb->y2 = y2;
208 spin_unlock_irqrestore(&fb->dirty_lock, flags);
209 return 0;
210 }
211
212 fb->x1 = fb->y1 = INT_MAX;
213 fb->x2 = fb->y2 = 0;
214
215 spin_unlock_irqrestore(&fb->dirty_lock, flags);
216 start_cycles = get_cycles();
217
218 urb = udl_get_urb(dev);
219 if (!urb)
220 return 0;
221 cmd = urb->transfer_buffer;
222
223 for (i = y; i <= y2 ; i++) {
224 const int line_offset = fb->base.pitches[0] * i;
225 const int byte_offset = line_offset + (x * bpp);
226 const int dev_byte_offset = (fb->base.width * bpp * i) + (x * bpp);
227 if (udl_render_hline(dev, bpp, &urb,
228 (char *) fb->obj->vmapping,
229 &cmd, byte_offset, dev_byte_offset,
230 (x2 - x + 1) * bpp,
231 &bytes_identical, &bytes_sent))
232 goto error;
233 }
234
235 if (cmd > (char *) urb->transfer_buffer) {
236
237 int len = cmd - (char *) urb->transfer_buffer;
238 ret = udl_submit_urb(dev, urb, len);
239 bytes_sent += len;
240 } else
241 udl_urb_completion(urb);
242
243error:
244 atomic_add(bytes_sent, &udl->bytes_sent);
245 atomic_add(bytes_identical, &udl->bytes_identical);
246 atomic_add(width*height*bpp, &udl->bytes_rendered);
247 end_cycles = get_cycles();
248 atomic_add(((unsigned int) ((end_cycles - start_cycles)
249 >> 10)),
250 &udl->cpu_kcycles_used);
251
252 return 0;
253}
254
255static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
256{
257 unsigned long start = vma->vm_start;
258 unsigned long size = vma->vm_end - vma->vm_start;
259 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
260 unsigned long page, pos;
261
262 if (offset + size > info->fix.smem_len)
263 return -EINVAL;
264
265 pos = (unsigned long)info->fix.smem_start + offset;
266
267 pr_notice("mmap() framebuffer addr:%lu size:%lu\n",
268 pos, size);
269
270 while (size > 0) {
271 page = vmalloc_to_pfn((void *)pos);
272 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
273 return -EAGAIN;
274
275 start += PAGE_SIZE;
276 pos += PAGE_SIZE;
277 if (size > PAGE_SIZE)
278 size -= PAGE_SIZE;
279 else
280 size = 0;
281 }
282
283
284 return 0;
285}
286
287static void udl_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
288{
289 struct udl_fbdev *ufbdev = info->par;
290
291 sys_fillrect(info, rect);
292
293 udl_handle_damage(&ufbdev->ufb, rect->dx, rect->dy, rect->width,
294 rect->height);
295}
296
297static void udl_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
298{
299 struct udl_fbdev *ufbdev = info->par;
300
301 sys_copyarea(info, region);
302
303 udl_handle_damage(&ufbdev->ufb, region->dx, region->dy, region->width,
304 region->height);
305}
306
307static void udl_fb_imageblit(struct fb_info *info, const struct fb_image *image)
308{
309 struct udl_fbdev *ufbdev = info->par;
310
311 sys_imageblit(info, image);
312
313 udl_handle_damage(&ufbdev->ufb, image->dx, image->dy, image->width,
314 image->height);
315}
316
317
318
319
320
321
322static int udl_fb_open(struct fb_info *info, int user)
323{
324 struct udl_fbdev *ufbdev = info->par;
325 struct drm_device *dev = ufbdev->ufb.base.dev;
326 struct udl_device *udl = dev->dev_private;
327
328
329 if (drm_device_is_unplugged(udl->ddev))
330 return -ENODEV;
331
332 ufbdev->fb_count++;
333
334 if (fb_defio && (info->fbdefio == NULL)) {
335
336
337 struct fb_deferred_io *fbdefio;
338
339 fbdefio = kmalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
340
341 if (fbdefio) {
342 fbdefio->delay = DL_DEFIO_WRITE_DELAY;
343 fbdefio->deferred_io = udlfb_dpy_deferred_io;
344 }
345
346 info->fbdefio = fbdefio;
347 fb_deferred_io_init(info);
348 }
349
350 pr_notice("open /dev/fb%d user=%d fb_info=%p count=%d\n",
351 info->node, user, info, ufbdev->fb_count);
352
353 return 0;
354}
355
356
357
358
359
360static int udl_fb_release(struct fb_info *info, int user)
361{
362 struct udl_fbdev *ufbdev = info->par;
363
364 ufbdev->fb_count--;
365
366 if ((ufbdev->fb_count == 0) && (info->fbdefio)) {
367 fb_deferred_io_cleanup(info);
368 kfree(info->fbdefio);
369 info->fbdefio = NULL;
370 info->fbops->fb_mmap = udl_fb_mmap;
371 }
372
373 pr_warn("released /dev/fb%d user=%d count=%d\n",
374 info->node, user, ufbdev->fb_count);
375
376 return 0;
377}
378
379static struct fb_ops udlfb_ops = {
380 .owner = THIS_MODULE,
381 .fb_check_var = drm_fb_helper_check_var,
382 .fb_set_par = drm_fb_helper_set_par,
383 .fb_fillrect = udl_fb_fillrect,
384 .fb_copyarea = udl_fb_copyarea,
385 .fb_imageblit = udl_fb_imageblit,
386 .fb_pan_display = drm_fb_helper_pan_display,
387 .fb_blank = drm_fb_helper_blank,
388 .fb_setcmap = drm_fb_helper_setcmap,
389 .fb_debug_enter = drm_fb_helper_debug_enter,
390 .fb_debug_leave = drm_fb_helper_debug_leave,
391 .fb_mmap = udl_fb_mmap,
392 .fb_open = udl_fb_open,
393 .fb_release = udl_fb_release,
394};
395
396static void udl_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
397 u16 blue, int regno)
398{
399}
400
401static void udl_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
402 u16 *blue, int regno)
403{
404 *red = 0;
405 *green = 0;
406 *blue = 0;
407}
408
409static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb,
410 struct drm_file *file,
411 unsigned flags, unsigned color,
412 struct drm_clip_rect *clips,
413 unsigned num_clips)
414{
415 struct udl_framebuffer *ufb = to_udl_fb(fb);
416 int i;
417 int ret = 0;
418
419 if (!ufb->active_16)
420 return 0;
421
422 if (ufb->obj->base.import_attach) {
423 ret = dma_buf_begin_cpu_access(ufb->obj->base.import_attach->dmabuf,
424 0, ufb->obj->base.size,
425 DMA_FROM_DEVICE);
426 if (ret)
427 return ret;
428 }
429
430 for (i = 0; i < num_clips; i++) {
431 ret = udl_handle_damage(ufb, clips[i].x1, clips[i].y1,
432 clips[i].x2 - clips[i].x1,
433 clips[i].y2 - clips[i].y1);
434 if (ret)
435 break;
436 }
437
438 if (ufb->obj->base.import_attach) {
439 dma_buf_end_cpu_access(ufb->obj->base.import_attach->dmabuf,
440 0, ufb->obj->base.size,
441 DMA_FROM_DEVICE);
442 }
443 return ret;
444}
445
446static void udl_user_framebuffer_destroy(struct drm_framebuffer *fb)
447{
448 struct udl_framebuffer *ufb = to_udl_fb(fb);
449
450 if (ufb->obj)
451 drm_gem_object_unreference_unlocked(&ufb->obj->base);
452
453 drm_framebuffer_cleanup(fb);
454 kfree(ufb);
455}
456
457static const struct drm_framebuffer_funcs udlfb_funcs = {
458 .destroy = udl_user_framebuffer_destroy,
459 .dirty = udl_user_framebuffer_dirty,
460};
461
462
463static int
464udl_framebuffer_init(struct drm_device *dev,
465 struct udl_framebuffer *ufb,
466 struct drm_mode_fb_cmd2 *mode_cmd,
467 struct udl_gem_object *obj)
468{
469 int ret;
470
471 spin_lock_init(&ufb->dirty_lock);
472 ufb->obj = obj;
473 drm_helper_mode_fill_fb_struct(&ufb->base, mode_cmd);
474 ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
475 return ret;
476}
477
478
479static int udlfb_create(struct drm_fb_helper *helper,
480 struct drm_fb_helper_surface_size *sizes)
481{
482 struct udl_fbdev *ufbdev = (struct udl_fbdev *)helper;
483 struct drm_device *dev = ufbdev->helper.dev;
484 struct fb_info *info;
485 struct device *device = dev->dev;
486 struct drm_framebuffer *fb;
487 struct drm_mode_fb_cmd2 mode_cmd;
488 struct udl_gem_object *obj;
489 uint32_t size;
490 int ret = 0;
491
492 if (sizes->surface_bpp == 24)
493 sizes->surface_bpp = 32;
494
495 mode_cmd.width = sizes->surface_width;
496 mode_cmd.height = sizes->surface_height;
497 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
498
499 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
500 sizes->surface_depth);
501
502 size = mode_cmd.pitches[0] * mode_cmd.height;
503 size = ALIGN(size, PAGE_SIZE);
504
505 obj = udl_gem_alloc_object(dev, size);
506 if (!obj)
507 goto out;
508
509 ret = udl_gem_vmap(obj);
510 if (ret) {
511 DRM_ERROR("failed to vmap fb\n");
512 goto out_gfree;
513 }
514
515 info = framebuffer_alloc(0, device);
516 if (!info) {
517 ret = -ENOMEM;
518 goto out_gfree;
519 }
520 info->par = ufbdev;
521
522 ret = udl_framebuffer_init(dev, &ufbdev->ufb, &mode_cmd, obj);
523 if (ret)
524 goto out_gfree;
525
526 fb = &ufbdev->ufb.base;
527
528 ufbdev->helper.fb = fb;
529 ufbdev->helper.fbdev = info;
530
531 strcpy(info->fix.id, "udldrmfb");
532
533 info->screen_base = ufbdev->ufb.obj->vmapping;
534 info->fix.smem_len = size;
535 info->fix.smem_start = (unsigned long)ufbdev->ufb.obj->vmapping;
536
537 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
538 info->fbops = &udlfb_ops;
539 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
540 drm_fb_helper_fill_var(info, &ufbdev->helper, sizes->fb_width, sizes->fb_height);
541
542 ret = fb_alloc_cmap(&info->cmap, 256, 0);
543 if (ret) {
544 ret = -ENOMEM;
545 goto out_gfree;
546 }
547
548
549 DRM_DEBUG_KMS("allocated %dx%d vmal %p\n",
550 fb->width, fb->height,
551 ufbdev->ufb.obj->vmapping);
552
553 return ret;
554out_gfree:
555 drm_gem_object_unreference(&ufbdev->ufb.obj->base);
556out:
557 return ret;
558}
559
560static struct drm_fb_helper_funcs udl_fb_helper_funcs = {
561 .gamma_set = udl_crtc_fb_gamma_set,
562 .gamma_get = udl_crtc_fb_gamma_get,
563 .fb_probe = udlfb_create,
564};
565
566static void udl_fbdev_destroy(struct drm_device *dev,
567 struct udl_fbdev *ufbdev)
568{
569 struct fb_info *info;
570 if (ufbdev->helper.fbdev) {
571 info = ufbdev->helper.fbdev;
572 unregister_framebuffer(info);
573 if (info->cmap.len)
574 fb_dealloc_cmap(&info->cmap);
575 framebuffer_release(info);
576 }
577 drm_fb_helper_fini(&ufbdev->helper);
578 drm_framebuffer_unregister_private(&ufbdev->ufb.base);
579 drm_framebuffer_cleanup(&ufbdev->ufb.base);
580 drm_gem_object_unreference_unlocked(&ufbdev->ufb.obj->base);
581}
582
583int udl_fbdev_init(struct drm_device *dev)
584{
585 struct udl_device *udl = dev->dev_private;
586 int bpp_sel = fb_bpp;
587 struct udl_fbdev *ufbdev;
588 int ret;
589
590 ufbdev = kzalloc(sizeof(struct udl_fbdev), GFP_KERNEL);
591 if (!ufbdev)
592 return -ENOMEM;
593
594 udl->fbdev = ufbdev;
595 ufbdev->helper.funcs = &udl_fb_helper_funcs;
596
597 ret = drm_fb_helper_init(dev, &ufbdev->helper,
598 1, 1);
599 if (ret) {
600 kfree(ufbdev);
601 return ret;
602
603 }
604
605 drm_fb_helper_single_add_all_connectors(&ufbdev->helper);
606
607
608 drm_helper_disable_unused_functions(dev);
609
610 drm_fb_helper_initial_config(&ufbdev->helper, bpp_sel);
611 return 0;
612}
613
614void udl_fbdev_cleanup(struct drm_device *dev)
615{
616 struct udl_device *udl = dev->dev_private;
617 if (!udl->fbdev)
618 return;
619
620 udl_fbdev_destroy(dev, udl->fbdev);
621 kfree(udl->fbdev);
622 udl->fbdev = NULL;
623}
624
625void udl_fbdev_unplug(struct drm_device *dev)
626{
627 struct udl_device *udl = dev->dev_private;
628 struct udl_fbdev *ufbdev;
629 if (!udl->fbdev)
630 return;
631
632 ufbdev = udl->fbdev;
633 if (ufbdev->helper.fbdev) {
634 struct fb_info *info;
635 info = ufbdev->helper.fbdev;
636 unlink_framebuffer(info);
637 }
638}
639
640struct drm_framebuffer *
641udl_fb_user_fb_create(struct drm_device *dev,
642 struct drm_file *file,
643 struct drm_mode_fb_cmd2 *mode_cmd)
644{
645 struct drm_gem_object *obj;
646 struct udl_framebuffer *ufb;
647 int ret;
648 uint32_t size;
649
650 obj = drm_gem_object_lookup(dev, file, mode_cmd->handles[0]);
651 if (obj == NULL)
652 return ERR_PTR(-ENOENT);
653
654 size = mode_cmd->pitches[0] * mode_cmd->height;
655 size = ALIGN(size, PAGE_SIZE);
656
657 if (size > obj->size) {
658 DRM_ERROR("object size not sufficient for fb %d %zu %d %d\n", size, obj->size, mode_cmd->pitches[0], mode_cmd->height);
659 return ERR_PTR(-ENOMEM);
660 }
661
662 ufb = kzalloc(sizeof(*ufb), GFP_KERNEL);
663 if (ufb == NULL)
664 return ERR_PTR(-ENOMEM);
665
666 ret = udl_framebuffer_init(dev, ufb, mode_cmd, to_udl_bo(obj));
667 if (ret) {
668 kfree(ufb);
669 return ERR_PTR(-EINVAL);
670 }
671 return &ufb->base;
672}
673