1
2
3
4
5
6
7
8
9
10#include <linux/module.h>
11#include <linux/slab.h>
12#include <linux/fb.h>
13#include <linux/dma-buf.h>
14#include <linux/mem_encrypt.h>
15
16#include <drm/drmP.h>
17#include <drm/drm_crtc.h>
18#include <drm/drm_crtc_helper.h>
19#include "udl_drv.h"
20
21#include <drm/drm_fb_helper.h>
22
23#define DL_DEFIO_WRITE_DELAY (HZ/20)
24
25static int fb_defio = 0;
26static int fb_bpp = 16;
27
28module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
29module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
30
31struct udl_fbdev {
32 struct drm_fb_helper helper;
33 struct udl_framebuffer ufb;
34 int fb_count;
35};
36
37#define DL_ALIGN_UP(x, a) ALIGN(x, a)
38#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
39
40
41#define DLO_RGB_GETRED(col) (uint8_t)((col) & 0xFF)
42
43
44#define DLO_RGB_GETGRN(col) (uint8_t)(((col) >> 8) & 0xFF)
45
46
47#define DLO_RGB_GETBLU(col) (uint8_t)(((col) >> 16) & 0xFF)
48
49
50#define DLO_RG16(red, grn) (uint8_t)((((red) & 0xF8) | ((grn) >> 5)) & 0xFF)
51
52
53#define DLO_GB16(grn, blu) (uint8_t)(((((grn) & 0x1C) << 3) | ((blu) >> 3)) & 0xFF)
54
55
56#define DLO_RGB8(red, grn, blu) ((((red) << 5) | (((grn) & 3) << 3) | ((blu) & 7)) & 0xFF)
57
58#if 0
59static uint8_t rgb8(uint32_t col)
60{
61 uint8_t red = DLO_RGB_GETRED(col);
62 uint8_t grn = DLO_RGB_GETGRN(col);
63 uint8_t blu = DLO_RGB_GETBLU(col);
64
65 return DLO_RGB8(red, grn, blu);
66}
67
68static uint16_t rgb16(uint32_t col)
69{
70 uint8_t red = DLO_RGB_GETRED(col);
71 uint8_t grn = DLO_RGB_GETGRN(col);
72 uint8_t blu = DLO_RGB_GETBLU(col);
73
74 return (DLO_RG16(red, grn) << 8) + DLO_GB16(grn, blu);
75}
76#endif
77
78int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
79 int width, int height)
80{
81 struct drm_device *dev = fb->base.dev;
82 struct udl_device *udl = to_udl(dev);
83 int i, ret;
84 char *cmd;
85 cycles_t start_cycles, end_cycles;
86 int bytes_sent = 0;
87 int bytes_identical = 0;
88 struct urb *urb;
89 int aligned_x;
90 int log_bpp;
91
92 BUG_ON(!is_power_of_2(fb->base.format->cpp[0]));
93 log_bpp = __ffs(fb->base.format->cpp[0]);
94
95 if (!fb->active_16)
96 return 0;
97
98 if (!fb->obj->vmapping) {
99 ret = udl_gem_vmap(fb->obj);
100 if (ret == -ENOMEM) {
101 DRM_ERROR("failed to vmap fb\n");
102 return 0;
103 }
104 if (!fb->obj->vmapping) {
105 DRM_ERROR("failed to vmapping\n");
106 return 0;
107 }
108 }
109
110 aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long));
111 width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long));
112 x = aligned_x;
113
114 if ((width <= 0) ||
115 (x + width > fb->base.width) ||
116 (y + height > fb->base.height))
117 return -EINVAL;
118
119 start_cycles = get_cycles();
120
121 urb = udl_get_urb(dev);
122 if (!urb)
123 return 0;
124 cmd = urb->transfer_buffer;
125
126 for (i = y; i < y + height ; i++) {
127 const int line_offset = fb->base.pitches[0] * i;
128 const int byte_offset = line_offset + (x << log_bpp);
129 const int dev_byte_offset = (fb->base.width * i + x) << log_bpp;
130 if (udl_render_hline(dev, log_bpp, &urb,
131 (char *) fb->obj->vmapping,
132 &cmd, byte_offset, dev_byte_offset,
133 width << log_bpp,
134 &bytes_identical, &bytes_sent))
135 goto error;
136 }
137
138 if (cmd > (char *) urb->transfer_buffer) {
139
140 int len;
141 if (cmd < (char *) urb->transfer_buffer + urb->transfer_buffer_length)
142 *cmd++ = 0xAF;
143 len = cmd - (char *) urb->transfer_buffer;
144 ret = udl_submit_urb(dev, urb, len);
145 bytes_sent += len;
146 } else
147 udl_urb_completion(urb);
148
149error:
150 atomic_add(bytes_sent, &udl->bytes_sent);
151 atomic_add(bytes_identical, &udl->bytes_identical);
152 atomic_add((width * height) << log_bpp, &udl->bytes_rendered);
153 end_cycles = get_cycles();
154 atomic_add(((unsigned int) ((end_cycles - start_cycles)
155 >> 10)),
156 &udl->cpu_kcycles_used);
157
158 return 0;
159}
160
161static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
162{
163 unsigned long start = vma->vm_start;
164 unsigned long size = vma->vm_end - vma->vm_start;
165 unsigned long offset;
166 unsigned long page, pos;
167
168 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
169 return -EINVAL;
170
171 offset = vma->vm_pgoff << PAGE_SHIFT;
172
173 if (offset > info->fix.smem_len || size > info->fix.smem_len - offset)
174 return -EINVAL;
175
176 pos = (unsigned long)info->fix.smem_start + offset;
177
178 pr_debug("mmap() framebuffer addr:%lu size:%lu\n",
179 pos, size);
180
181
182 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
183
184 while (size > 0) {
185 page = vmalloc_to_pfn((void *)pos);
186 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
187 return -EAGAIN;
188
189 start += PAGE_SIZE;
190 pos += PAGE_SIZE;
191 if (size > PAGE_SIZE)
192 size -= PAGE_SIZE;
193 else
194 size = 0;
195 }
196
197
198 return 0;
199}
200
201
202
203
204
205
206static int udl_fb_open(struct fb_info *info, int user)
207{
208 struct udl_fbdev *ufbdev = info->par;
209 struct drm_device *dev = ufbdev->ufb.base.dev;
210 struct udl_device *udl = to_udl(dev);
211
212
213 if (drm_dev_is_unplugged(&udl->drm))
214 return -ENODEV;
215
216 ufbdev->fb_count++;
217
218#ifdef CONFIG_DRM_FBDEV_EMULATION
219 if (fb_defio && (info->fbdefio == NULL)) {
220
221
222 struct fb_deferred_io *fbdefio;
223
224 fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
225
226 if (fbdefio) {
227 fbdefio->delay = DL_DEFIO_WRITE_DELAY;
228 fbdefio->deferred_io = drm_fb_helper_deferred_io;
229 }
230
231 info->fbdefio = fbdefio;
232 fb_deferred_io_init(info);
233 }
234#endif
235
236 pr_debug("open /dev/fb%d user=%d fb_info=%p count=%d\n",
237 info->node, user, info, ufbdev->fb_count);
238
239 return 0;
240}
241
242
243
244
245
246static int udl_fb_release(struct fb_info *info, int user)
247{
248 struct udl_fbdev *ufbdev = info->par;
249
250 ufbdev->fb_count--;
251
252#ifdef CONFIG_DRM_FBDEV_EMULATION
253 if ((ufbdev->fb_count == 0) && (info->fbdefio)) {
254 fb_deferred_io_cleanup(info);
255 kfree(info->fbdefio);
256 info->fbdefio = NULL;
257 info->fbops->fb_mmap = udl_fb_mmap;
258 }
259#endif
260
261 pr_debug("released /dev/fb%d user=%d count=%d\n",
262 info->node, user, ufbdev->fb_count);
263
264 return 0;
265}
266
267static struct fb_ops udlfb_ops = {
268 .owner = THIS_MODULE,
269 DRM_FB_HELPER_DEFAULT_OPS,
270 .fb_fillrect = drm_fb_helper_sys_fillrect,
271 .fb_copyarea = drm_fb_helper_sys_copyarea,
272 .fb_imageblit = drm_fb_helper_sys_imageblit,
273 .fb_mmap = udl_fb_mmap,
274 .fb_open = udl_fb_open,
275 .fb_release = udl_fb_release,
276};
277
278static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb,
279 struct drm_file *file,
280 unsigned flags, unsigned color,
281 struct drm_clip_rect *clips,
282 unsigned num_clips)
283{
284 struct udl_framebuffer *ufb = to_udl_fb(fb);
285 int i;
286 int ret = 0;
287
288 drm_modeset_lock_all(fb->dev);
289
290 if (!ufb->active_16)
291 goto unlock;
292
293 if (ufb->obj->base.import_attach) {
294 ret = dma_buf_begin_cpu_access(ufb->obj->base.import_attach->dmabuf,
295 DMA_FROM_DEVICE);
296 if (ret)
297 goto unlock;
298 }
299
300 for (i = 0; i < num_clips; i++) {
301 ret = udl_handle_damage(ufb, clips[i].x1, clips[i].y1,
302 clips[i].x2 - clips[i].x1,
303 clips[i].y2 - clips[i].y1);
304 if (ret)
305 break;
306 }
307
308 if (ufb->obj->base.import_attach) {
309 ret = dma_buf_end_cpu_access(ufb->obj->base.import_attach->dmabuf,
310 DMA_FROM_DEVICE);
311 }
312
313 unlock:
314 drm_modeset_unlock_all(fb->dev);
315
316 return ret;
317}
318
319static void udl_user_framebuffer_destroy(struct drm_framebuffer *fb)
320{
321 struct udl_framebuffer *ufb = to_udl_fb(fb);
322
323 if (ufb->obj)
324 drm_gem_object_put_unlocked(&ufb->obj->base);
325
326 drm_framebuffer_cleanup(fb);
327 kfree(ufb);
328}
329
330static const struct drm_framebuffer_funcs udlfb_funcs = {
331 .destroy = udl_user_framebuffer_destroy,
332 .dirty = udl_user_framebuffer_dirty,
333};
334
335
336static int
337udl_framebuffer_init(struct drm_device *dev,
338 struct udl_framebuffer *ufb,
339 const struct drm_mode_fb_cmd2 *mode_cmd,
340 struct udl_gem_object *obj)
341{
342 int ret;
343
344 ufb->obj = obj;
345 drm_helper_mode_fill_fb_struct(dev, &ufb->base, mode_cmd);
346 ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
347 return ret;
348}
349
350
351static int udlfb_create(struct drm_fb_helper *helper,
352 struct drm_fb_helper_surface_size *sizes)
353{
354 struct udl_fbdev *ufbdev =
355 container_of(helper, struct udl_fbdev, helper);
356 struct drm_device *dev = ufbdev->helper.dev;
357 struct fb_info *info;
358 struct drm_framebuffer *fb;
359 struct drm_mode_fb_cmd2 mode_cmd;
360 struct udl_gem_object *obj;
361 uint32_t size;
362 int ret = 0;
363
364 if (sizes->surface_bpp == 24)
365 sizes->surface_bpp = 32;
366
367 mode_cmd.width = sizes->surface_width;
368 mode_cmd.height = sizes->surface_height;
369 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
370
371 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
372 sizes->surface_depth);
373
374 size = mode_cmd.pitches[0] * mode_cmd.height;
375 size = ALIGN(size, PAGE_SIZE);
376
377 obj = udl_gem_alloc_object(dev, size);
378 if (!obj)
379 goto out;
380
381 ret = udl_gem_vmap(obj);
382 if (ret) {
383 DRM_ERROR("failed to vmap fb\n");
384 goto out_gfree;
385 }
386
387 info = drm_fb_helper_alloc_fbi(helper);
388 if (IS_ERR(info)) {
389 ret = PTR_ERR(info);
390 goto out_gfree;
391 }
392
393 ret = udl_framebuffer_init(dev, &ufbdev->ufb, &mode_cmd, obj);
394 if (ret)
395 goto out_gfree;
396
397 fb = &ufbdev->ufb.base;
398
399 ufbdev->helper.fb = fb;
400
401 info->screen_base = ufbdev->ufb.obj->vmapping;
402 info->fix.smem_len = size;
403 info->fix.smem_start = (unsigned long)ufbdev->ufb.obj->vmapping;
404
405 info->fbops = &udlfb_ops;
406 drm_fb_helper_fill_info(info, &ufbdev->helper, sizes);
407
408 DRM_DEBUG_KMS("allocated %dx%d vmal %p\n",
409 fb->width, fb->height,
410 ufbdev->ufb.obj->vmapping);
411
412 return ret;
413out_gfree:
414 drm_gem_object_put_unlocked(&ufbdev->ufb.obj->base);
415out:
416 return ret;
417}
418
419static const struct drm_fb_helper_funcs udl_fb_helper_funcs = {
420 .fb_probe = udlfb_create,
421};
422
423static void udl_fbdev_destroy(struct drm_device *dev,
424 struct udl_fbdev *ufbdev)
425{
426 drm_fb_helper_unregister_fbi(&ufbdev->helper);
427 drm_fb_helper_fini(&ufbdev->helper);
428 if (ufbdev->ufb.obj) {
429 drm_framebuffer_unregister_private(&ufbdev->ufb.base);
430 drm_framebuffer_cleanup(&ufbdev->ufb.base);
431 drm_gem_object_put_unlocked(&ufbdev->ufb.obj->base);
432 }
433}
434
435int udl_fbdev_init(struct drm_device *dev)
436{
437 struct udl_device *udl = to_udl(dev);
438 int bpp_sel = fb_bpp;
439 struct udl_fbdev *ufbdev;
440 int ret;
441
442 ufbdev = kzalloc(sizeof(struct udl_fbdev), GFP_KERNEL);
443 if (!ufbdev)
444 return -ENOMEM;
445
446 udl->fbdev = ufbdev;
447
448 drm_fb_helper_prepare(dev, &ufbdev->helper, &udl_fb_helper_funcs);
449
450 ret = drm_fb_helper_init(dev, &ufbdev->helper, 1);
451 if (ret)
452 goto free;
453
454 ret = drm_fb_helper_single_add_all_connectors(&ufbdev->helper);
455 if (ret)
456 goto fini;
457
458
459 drm_helper_disable_unused_functions(dev);
460
461 ret = drm_fb_helper_initial_config(&ufbdev->helper, bpp_sel);
462 if (ret)
463 goto fini;
464
465 return 0;
466
467fini:
468 drm_fb_helper_fini(&ufbdev->helper);
469free:
470 kfree(ufbdev);
471 return ret;
472}
473
474void udl_fbdev_cleanup(struct drm_device *dev)
475{
476 struct udl_device *udl = to_udl(dev);
477 if (!udl->fbdev)
478 return;
479
480 udl_fbdev_destroy(dev, udl->fbdev);
481 kfree(udl->fbdev);
482 udl->fbdev = NULL;
483}
484
485void udl_fbdev_unplug(struct drm_device *dev)
486{
487 struct udl_device *udl = to_udl(dev);
488 struct udl_fbdev *ufbdev;
489 if (!udl->fbdev)
490 return;
491
492 ufbdev = udl->fbdev;
493 drm_fb_helper_unlink_fbi(&ufbdev->helper);
494}
495
496struct drm_framebuffer *
497udl_fb_user_fb_create(struct drm_device *dev,
498 struct drm_file *file,
499 const struct drm_mode_fb_cmd2 *mode_cmd)
500{
501 struct drm_gem_object *obj;
502 struct udl_framebuffer *ufb;
503 int ret;
504 uint32_t size;
505
506 obj = drm_gem_object_lookup(file, mode_cmd->handles[0]);
507 if (obj == NULL)
508 return ERR_PTR(-ENOENT);
509
510 size = mode_cmd->pitches[0] * mode_cmd->height;
511 size = ALIGN(size, PAGE_SIZE);
512
513 if (size > obj->size) {
514 DRM_ERROR("object size not sufficient for fb %d %zu %d %d\n", size, obj->size, mode_cmd->pitches[0], mode_cmd->height);
515 return ERR_PTR(-ENOMEM);
516 }
517
518 ufb = kzalloc(sizeof(*ufb), GFP_KERNEL);
519 if (ufb == NULL)
520 return ERR_PTR(-ENOMEM);
521
522 ret = udl_framebuffer_init(dev, ufb, mode_cmd, to_udl_bo(obj));
523 if (ret) {
524 kfree(ufb);
525 return ERR_PTR(-EINVAL);
526 }
527 return &ufb->base;
528}
529
