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1/*
2 * Copyright © 2013 Red Hat
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * David Airlie
25 */
26#include <linux/module.h>
27#include <linux/fb.h>
28
29#include "drmP.h"
30#include "drm/drm.h"
31#include "drm/drm_crtc.h"
32#include "drm/drm_crtc_helper.h"
33#include "qxl_drv.h"
34
35#include "qxl_object.h"
36#include "drm_fb_helper.h"
37
38#define QXL_DIRTY_DELAY (HZ / 30)
39
40struct qxl_fbdev {
41 struct drm_fb_helper helper;
42 struct qxl_framebuffer qfb;
43 struct qxl_device *qdev;
44
45 spinlock_t delayed_ops_lock;
46 struct list_head delayed_ops;
47 void *shadow;
48 int size;
49
50 /* dirty memory logging */
51 struct {
52 spinlock_t lock;
53 unsigned x1;
54 unsigned y1;
55 unsigned x2;
56 unsigned y2;
57 } dirty;
58};
59
60static void qxl_fb_image_init(struct qxl_fb_image *qxl_fb_image,
61 struct qxl_device *qdev, struct fb_info *info,
62 const struct fb_image *image)
63{
64 qxl_fb_image->qdev = qdev;
65 if (info) {
66 qxl_fb_image->visual = info->fix.visual;
67 if (qxl_fb_image->visual == FB_VISUAL_TRUECOLOR ||
68 qxl_fb_image->visual == FB_VISUAL_DIRECTCOLOR)
69 memcpy(&qxl_fb_image->pseudo_palette,
70 info->pseudo_palette,
71 sizeof(qxl_fb_image->pseudo_palette));
72 } else {
73 /* fallback */
74 if (image->depth == 1)
75 qxl_fb_image->visual = FB_VISUAL_MONO10;
76 else
77 qxl_fb_image->visual = FB_VISUAL_DIRECTCOLOR;
78 }
79 if (image) {
80 memcpy(&qxl_fb_image->fb_image, image,
81 sizeof(qxl_fb_image->fb_image));
82 }
83}
84
85static void qxl_fb_dirty_flush(struct fb_info *info)
86{
87 struct qxl_fbdev *qfbdev = info->par;
88 struct qxl_device *qdev = qfbdev->qdev;
89 struct qxl_fb_image qxl_fb_image;
90 struct fb_image *image = &qxl_fb_image.fb_image;
91 unsigned long flags;
92 u32 x1, x2, y1, y2;
93
94 /* TODO: hard coding 32 bpp */
95 int stride = qfbdev->qfb.base.pitches[0];
96
97 spin_lock_irqsave(&qfbdev->dirty.lock, flags);
98
99 x1 = qfbdev->dirty.x1;
100 x2 = qfbdev->dirty.x2;
101 y1 = qfbdev->dirty.y1;
102 y2 = qfbdev->dirty.y2;
103 qfbdev->dirty.x1 = 0;
104 qfbdev->dirty.x2 = 0;
105 qfbdev->dirty.y1 = 0;
106 qfbdev->dirty.y2 = 0;
107
108 spin_unlock_irqrestore(&qfbdev->dirty.lock, flags);
109
110 /*
111 * we are using a shadow draw buffer, at qdev->surface0_shadow
112 */
113 qxl_io_log(qdev, "dirty x[%d, %d], y[%d, %d]", x1, x2, y1, y2);
114 image->dx = x1;
115 image->dy = y1;
116 image->width = x2 - x1 + 1;
117 image->height = y2 - y1 + 1;
118 image->fg_color = 0xffffffff; /* unused, just to avoid uninitialized
119 warnings */
120 image->bg_color = 0;
121 image->depth = 32; /* TODO: take from somewhere? */
122 image->cmap.start = 0;
123 image->cmap.len = 0;
124 image->cmap.red = NULL;
125 image->cmap.green = NULL;
126 image->cmap.blue = NULL;
127 image->cmap.transp = NULL;
128 image->data = qfbdev->shadow + (x1 * 4) + (stride * y1);
129
130 qxl_fb_image_init(&qxl_fb_image, qdev, info, NULL);
131 qxl_draw_opaque_fb(&qxl_fb_image, stride);
132}
133
134static void qxl_dirty_update(struct qxl_fbdev *qfbdev,
135 int x, int y, int width, int height)
136{
137 struct qxl_device *qdev = qfbdev->qdev;
138 unsigned long flags;
139 int x2, y2;
140
141 x2 = x + width - 1;
142 y2 = y + height - 1;
143
144 spin_lock_irqsave(&qfbdev->dirty.lock, flags);
145
146 if ((qfbdev->dirty.y2 - qfbdev->dirty.y1) &&
147 (qfbdev->dirty.x2 - qfbdev->dirty.x1)) {
148 if (qfbdev->dirty.y1 < y)
149 y = qfbdev->dirty.y1;
150 if (qfbdev->dirty.y2 > y2)
151 y2 = qfbdev->dirty.y2;
152 if (qfbdev->dirty.x1 < x)
153 x = qfbdev->dirty.x1;
154 if (qfbdev->dirty.x2 > x2)
155 x2 = qfbdev->dirty.x2;
156 }
157
158 qfbdev->dirty.x1 = x;
159 qfbdev->dirty.x2 = x2;
160 qfbdev->dirty.y1 = y;
161 qfbdev->dirty.y2 = y2;
162
163 spin_unlock_irqrestore(&qfbdev->dirty.lock, flags);
164
165 schedule_work(&qdev->fb_work);
166}
167
168static void qxl_deferred_io(struct fb_info *info,
169 struct list_head *pagelist)
170{
171 struct qxl_fbdev *qfbdev = info->par;
172 unsigned long start, end, min, max;
173 struct page *page;
174 int y1, y2;
175
176 min = ULONG_MAX;
177 max = 0;
178 list_for_each_entry(page, pagelist, lru) {
179 start = page->index << PAGE_SHIFT;
180 end = start + PAGE_SIZE - 1;
181 min = min(min, start);
182 max = max(max, end);
183 }
184
185 if (min < max) {
186 y1 = min / info->fix.line_length;
187 y2 = (max / info->fix.line_length) + 1;
188 qxl_dirty_update(qfbdev, 0, y1, info->var.xres, y2 - y1);
189 }
190};
191
192static struct fb_deferred_io qxl_defio = {
193 .delay = QXL_DIRTY_DELAY,
194 .deferred_io = qxl_deferred_io,
195};
196
197static void qxl_fb_fillrect(struct fb_info *info,
198 const struct fb_fillrect *rect)
199{
200 struct qxl_fbdev *qfbdev = info->par;
201
202 drm_fb_helper_sys_fillrect(info, rect);
203 qxl_dirty_update(qfbdev, rect->dx, rect->dy, rect->width,
204 rect->height);
205}
206
207static void qxl_fb_copyarea(struct fb_info *info,
208 const struct fb_copyarea *area)
209{
210 struct qxl_fbdev *qfbdev = info->par;
211
212 drm_fb_helper_sys_copyarea(info, area);
213 qxl_dirty_update(qfbdev, area->dx, area->dy, area->width,
214 area->height);
215}
216
217static void qxl_fb_imageblit(struct fb_info *info,
218 const struct fb_image *image)
219{
220 struct qxl_fbdev *qfbdev = info->par;
221
222 drm_fb_helper_sys_imageblit(info, image);
223 qxl_dirty_update(qfbdev, image->dx, image->dy, image->width,
224 image->height);
225}
226
227static void qxl_fb_work(struct work_struct *work)
228{
229 struct qxl_device *qdev = container_of(work, struct qxl_device, fb_work);
230 struct qxl_fbdev *qfbdev = qdev->mode_info.qfbdev;
231
232 qxl_fb_dirty_flush(qfbdev->helper.fbdev);
233}
234
235int qxl_fb_init(struct qxl_device *qdev)
236{
237 INIT_WORK(&qdev->fb_work, qxl_fb_work);
238 return 0;
239}
240
241static struct fb_ops qxlfb_ops = {
242 .owner = THIS_MODULE,
243 .fb_check_var = drm_fb_helper_check_var,
244 .fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
245 .fb_fillrect = qxl_fb_fillrect,
246 .fb_copyarea = qxl_fb_copyarea,
247 .fb_imageblit = qxl_fb_imageblit,
248 .fb_pan_display = drm_fb_helper_pan_display,
249 .fb_blank = drm_fb_helper_blank,
250 .fb_setcmap = drm_fb_helper_setcmap,
251 .fb_debug_enter = drm_fb_helper_debug_enter,
252 .fb_debug_leave = drm_fb_helper_debug_leave,
253};
254
255static void qxlfb_destroy_pinned_object(struct drm_gem_object *gobj)
256{
257 struct qxl_bo *qbo = gem_to_qxl_bo(gobj);
258 int ret;
259
260 ret = qxl_bo_reserve(qbo, false);
261 if (likely(ret == 0)) {
262 qxl_bo_kunmap(qbo);
263 qxl_bo_unpin(qbo);
264 qxl_bo_unreserve(qbo);
265 }
266 drm_gem_object_unreference_unlocked(gobj);
267}
268
269int qxl_get_handle_for_primary_fb(struct qxl_device *qdev,
270 struct drm_file *file_priv,
271 uint32_t *handle)
272{
273 int r;
274 struct drm_gem_object *gobj = qdev->fbdev_qfb->obj;
275
276 BUG_ON(!gobj);
277 /* drm_get_handle_create adds a reference - good */
278 r = drm_gem_handle_create(file_priv, gobj, handle);
279 if (r)
280 return r;
281 return 0;
282}
283
284static int qxlfb_create_pinned_object(struct qxl_fbdev *qfbdev,
285 const struct drm_mode_fb_cmd2 *mode_cmd,
286 struct drm_gem_object **gobj_p)
287{
288 struct qxl_device *qdev = qfbdev->qdev;
289 struct drm_gem_object *gobj = NULL;
290 struct qxl_bo *qbo = NULL;
291 int ret;
292 int aligned_size, size;
293 int height = mode_cmd->height;
294 int bpp;
295 int depth;
296
297 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &bpp, &depth);
298
299 size = mode_cmd->pitches[0] * height;
300 aligned_size = ALIGN(size, PAGE_SIZE);
301 /* TODO: unallocate and reallocate surface0 for real. Hack to just
302 * have a large enough surface0 for 1024x768 Xorg 32bpp mode */
303 ret = qxl_gem_object_create(qdev, aligned_size, 0,
304 QXL_GEM_DOMAIN_SURFACE,
305 false, /* is discardable */
306 false, /* is kernel (false means device) */
307 NULL,
308 &gobj);
309 if (ret) {
310 pr_err("failed to allocate framebuffer (%d)\n",
311 aligned_size);
312 return -ENOMEM;
313 }
314 qbo = gem_to_qxl_bo(gobj);
315
316 qbo->surf.width = mode_cmd->width;
317 qbo->surf.height = mode_cmd->height;
318 qbo->surf.stride = mode_cmd->pitches[0];
319 qbo->surf.format = SPICE_SURFACE_FMT_32_xRGB;
320 ret = qxl_bo_reserve(qbo, false);
321 if (unlikely(ret != 0))
322 goto out_unref;
323 ret = qxl_bo_pin(qbo, QXL_GEM_DOMAIN_SURFACE, NULL);
324 if (ret) {
325 qxl_bo_unreserve(qbo);
326 goto out_unref;
327 }
328 ret = qxl_bo_kmap(qbo, NULL);
329 qxl_bo_unreserve(qbo); /* unreserve, will be mmaped */
330 if (ret)
331 goto out_unref;
332
333 *gobj_p = gobj;
334 return 0;
335out_unref:
336 qxlfb_destroy_pinned_object(gobj);
337 *gobj_p = NULL;
338 return ret;
339}
340
341static int qxlfb_create(struct qxl_fbdev *qfbdev,
342 struct drm_fb_helper_surface_size *sizes)
343{
344 struct qxl_device *qdev = qfbdev->qdev;
345 struct fb_info *info;
346 struct drm_framebuffer *fb = NULL;
347 struct drm_mode_fb_cmd2 mode_cmd;
348 struct drm_gem_object *gobj = NULL;
349 struct qxl_bo *qbo = NULL;
350 int ret;
351 int size;
352 int bpp = sizes->surface_bpp;
353 int depth = sizes->surface_depth;
354 void *shadow;
355
356 mode_cmd.width = sizes->surface_width;
357 mode_cmd.height = sizes->surface_height;
358
359 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 1) / 8), 64);
360 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
361
362 ret = qxlfb_create_pinned_object(qfbdev, &mode_cmd, &gobj);
363 qbo = gem_to_qxl_bo(gobj);
364 QXL_INFO(qdev, "%s: %dx%d %d\n", __func__, mode_cmd.width,
365 mode_cmd.height, mode_cmd.pitches[0]);
366
367 shadow = vmalloc(mode_cmd.pitches[0] * mode_cmd.height);
368 /* TODO: what's the usual response to memory allocation errors? */
369 BUG_ON(!shadow);
370 QXL_INFO(qdev,
371 "surface0 at gpu offset %lld, mmap_offset %lld (virt %p, shadow %p)\n",
372 qxl_bo_gpu_offset(qbo),
373 qxl_bo_mmap_offset(qbo),
374 qbo->kptr,
375 shadow);
376 size = mode_cmd.pitches[0] * mode_cmd.height;
377
378 info = drm_fb_helper_alloc_fbi(&qfbdev->helper);
379 if (IS_ERR(info)) {
380 ret = PTR_ERR(info);
381 goto out_unref;
382 }
383
384 info->par = qfbdev;
385
386 qxl_framebuffer_init(qdev->ddev, &qfbdev->qfb, &mode_cmd, gobj);
387
388 fb = &qfbdev->qfb.base;
389
390 /* setup helper with fb data */
391 qfbdev->helper.fb = fb;
392
393 qfbdev->shadow = shadow;
394 strcpy(info->fix.id, "qxldrmfb");
395
396 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
397
398 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
399 info->fbops = &qxlfb_ops;
400
401 /*
402 * TODO: using gobj->size in various places in this function. Not sure
403 * what the difference between the different sizes is.
404 */
405 info->fix.smem_start = qdev->vram_base; /* TODO - correct? */
406 info->fix.smem_len = gobj->size;
407 info->screen_base = qfbdev->shadow;
408 info->screen_size = gobj->size;
409
410 drm_fb_helper_fill_var(info, &qfbdev->helper, sizes->fb_width,
411 sizes->fb_height);
412
413 /* setup aperture base/size for vesafb takeover */
414 info->apertures->ranges[0].base = qdev->ddev->mode_config.fb_base;
415 info->apertures->ranges[0].size = qdev->vram_size;
416
417 info->fix.mmio_start = 0;
418 info->fix.mmio_len = 0;
419
420 if (info->screen_base == NULL) {
421 ret = -ENOSPC;
422 goto out_destroy_fbi;
423 }
424
425 info->fbdefio = &qxl_defio;
426 fb_deferred_io_init(info);
427
428 qdev->fbdev_info = info;
429 qdev->fbdev_qfb = &qfbdev->qfb;
430 DRM_INFO("fb mappable at 0x%lX, size %lu\n", info->fix.smem_start, (unsigned long)info->screen_size);
431 DRM_INFO("fb: depth %d, pitch %d, width %d, height %d\n", fb->depth, fb->pitches[0], fb->width, fb->height);
432 return 0;
433
434out_destroy_fbi:
435 drm_fb_helper_release_fbi(&qfbdev->helper);
436out_unref:
437 if (qbo) {
438 ret = qxl_bo_reserve(qbo, false);
439 if (likely(ret == 0)) {
440 qxl_bo_kunmap(qbo);
441 qxl_bo_unpin(qbo);
442 qxl_bo_unreserve(qbo);
443 }
444 }
445 if (fb && ret) {
446 drm_gem_object_unreference(gobj);
447 drm_framebuffer_cleanup(fb);
448 kfree(fb);
449 }
450 drm_gem_object_unreference(gobj);
451 return ret;
452}
453
454static int qxl_fb_find_or_create_single(
455 struct drm_fb_helper *helper,
456 struct drm_fb_helper_surface_size *sizes)
457{
458 struct qxl_fbdev *qfbdev =
459 container_of(helper, struct qxl_fbdev, helper);
460 int new_fb = 0;
461 int ret;
462
463 if (!helper->fb) {
464 ret = qxlfb_create(qfbdev, sizes);
465 if (ret)
466 return ret;
467 new_fb = 1;
468 }
469 return new_fb;
470}
471
472static int qxl_fbdev_destroy(struct drm_device *dev, struct qxl_fbdev *qfbdev)
473{
474 struct qxl_framebuffer *qfb = &qfbdev->qfb;
475
476 drm_fb_helper_unregister_fbi(&qfbdev->helper);
477 drm_fb_helper_release_fbi(&qfbdev->helper);
478
479 if (qfb->obj) {
480 qxlfb_destroy_pinned_object(qfb->obj);
481 qfb->obj = NULL;
482 }
483 drm_fb_helper_fini(&qfbdev->helper);
484 vfree(qfbdev->shadow);
485 drm_framebuffer_cleanup(&qfb->base);
486
487 return 0;
488}
489
490static const struct drm_fb_helper_funcs qxl_fb_helper_funcs = {
491 .fb_probe = qxl_fb_find_or_create_single,
492};
493
494int qxl_fbdev_init(struct qxl_device *qdev)
495{
496 struct qxl_fbdev *qfbdev;
497 int bpp_sel = 32; /* TODO: parameter from somewhere? */
498 int ret;
499
500 qfbdev = kzalloc(sizeof(struct qxl_fbdev), GFP_KERNEL);
501 if (!qfbdev)
502 return -ENOMEM;
503
504 qfbdev->qdev = qdev;
505 qdev->mode_info.qfbdev = qfbdev;
506 spin_lock_init(&qfbdev->delayed_ops_lock);
507 spin_lock_init(&qfbdev->dirty.lock);
508 INIT_LIST_HEAD(&qfbdev->delayed_ops);
509
510 drm_fb_helper_prepare(qdev->ddev, &qfbdev->helper,
511 &qxl_fb_helper_funcs);
512
513 ret = drm_fb_helper_init(qdev->ddev, &qfbdev->helper,
514 qxl_num_crtc /* num_crtc - QXL supports just 1 */,
515 QXLFB_CONN_LIMIT);
516 if (ret)
517 goto free;
518
519 ret = drm_fb_helper_single_add_all_connectors(&qfbdev->helper);
520 if (ret)
521 goto fini;
522
523 ret = drm_fb_helper_initial_config(&qfbdev->helper, bpp_sel);
524 if (ret)
525 goto fini;
526
527 return 0;
528
529fini:
530 drm_fb_helper_fini(&qfbdev->helper);
531free:
532 kfree(qfbdev);
533 return ret;
534}
535
536void qxl_fbdev_fini(struct qxl_device *qdev)
537{
538 if (!qdev->mode_info.qfbdev)
539 return;
540
541 qxl_fbdev_destroy(qdev->ddev, qdev->mode_info.qfbdev);
542 kfree(qdev->mode_info.qfbdev);
543 qdev->mode_info.qfbdev = NULL;
544}
545
546void qxl_fbdev_set_suspend(struct qxl_device *qdev, int state)
547{
548 drm_fb_helper_set_suspend(&qdev->mode_info.qfbdev->helper, state);
549}
550
551bool qxl_fbdev_qobj_is_fb(struct qxl_device *qdev, struct qxl_bo *qobj)
552{
553 if (qobj == gem_to_qxl_bo(qdev->mode_info.qfbdev->qfb.obj))
554 return true;
555 return false;
556}