Merge tag 'uapi-prep-20121002' of git://git.infradead.org/users/dhowells/linux-headers
[linux-3.10.git] / drivers / gpu / drm / vmwgfx / vmwgfx_fb.c
1 /**************************************************************************
2  *
3  * Copyright © 2007 David Airlie
4  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
5  * All Rights Reserved.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the
9  * "Software"), to deal in the Software without restriction, including
10  * without limitation the rights to use, copy, modify, merge, publish,
11  * distribute, sub license, and/or sell copies of the Software, and to
12  * permit persons to whom the Software is furnished to do so, subject to
13  * the following conditions:
14  *
15  * The above copyright notice and this permission notice (including the
16  * next paragraph) shall be included in all copies or substantial portions
17  * of the Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25  * USE OR OTHER DEALINGS IN THE SOFTWARE.
26  *
27  **************************************************************************/
28
29 #include <linux/export.h>
30
31 #include <drm/drmP.h>
32 #include "vmwgfx_drv.h"
33
34 #include <drm/ttm/ttm_placement.h>
35
36 #define VMW_DIRTY_DELAY (HZ / 30)
37
38 struct vmw_fb_par {
39         struct vmw_private *vmw_priv;
40
41         void *vmalloc;
42
43         struct vmw_dma_buffer *vmw_bo;
44         struct ttm_bo_kmap_obj map;
45
46         u32 pseudo_palette[17];
47
48         unsigned depth;
49         unsigned bpp;
50
51         unsigned max_width;
52         unsigned max_height;
53
54         void *bo_ptr;
55         unsigned bo_size;
56         bool bo_iowrite;
57
58         struct {
59                 spinlock_t lock;
60                 bool active;
61                 unsigned x1;
62                 unsigned y1;
63                 unsigned x2;
64                 unsigned y2;
65         } dirty;
66 };
67
68 static int vmw_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
69                             unsigned blue, unsigned transp,
70                             struct fb_info *info)
71 {
72         struct vmw_fb_par *par = info->par;
73         u32 *pal = par->pseudo_palette;
74
75         if (regno > 15) {
76                 DRM_ERROR("Bad regno %u.\n", regno);
77                 return 1;
78         }
79
80         switch (par->depth) {
81         case 24:
82         case 32:
83                 pal[regno] = ((red & 0xff00) << 8) |
84                               (green & 0xff00) |
85                              ((blue  & 0xff00) >> 8);
86                 break;
87         default:
88                 DRM_ERROR("Bad depth %u, bpp %u.\n", par->depth, par->bpp);
89                 return 1;
90         }
91
92         return 0;
93 }
94
95 static int vmw_fb_check_var(struct fb_var_screeninfo *var,
96                             struct fb_info *info)
97 {
98         int depth = var->bits_per_pixel;
99         struct vmw_fb_par *par = info->par;
100         struct vmw_private *vmw_priv = par->vmw_priv;
101
102         switch (var->bits_per_pixel) {
103         case 32:
104                 depth = (var->transp.length > 0) ? 32 : 24;
105                 break;
106         default:
107                 DRM_ERROR("Bad bpp %u.\n", var->bits_per_pixel);
108                 return -EINVAL;
109         }
110
111         switch (depth) {
112         case 24:
113                 var->red.offset = 16;
114                 var->green.offset = 8;
115                 var->blue.offset = 0;
116                 var->red.length = 8;
117                 var->green.length = 8;
118                 var->blue.length = 8;
119                 var->transp.length = 0;
120                 var->transp.offset = 0;
121                 break;
122         case 32:
123                 var->red.offset = 16;
124                 var->green.offset = 8;
125                 var->blue.offset = 0;
126                 var->red.length = 8;
127                 var->green.length = 8;
128                 var->blue.length = 8;
129                 var->transp.length = 8;
130                 var->transp.offset = 24;
131                 break;
132         default:
133                 DRM_ERROR("Bad depth %u.\n", depth);
134                 return -EINVAL;
135         }
136
137         if (!(vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) &&
138             (var->xoffset != 0 || var->yoffset != 0)) {
139                 DRM_ERROR("Can not handle panning without display topology\n");
140                 return -EINVAL;
141         }
142
143         if ((var->xoffset + var->xres) > par->max_width ||
144             (var->yoffset + var->yres) > par->max_height) {
145                 DRM_ERROR("Requested geom can not fit in framebuffer\n");
146                 return -EINVAL;
147         }
148
149         if (!vmw_kms_validate_mode_vram(vmw_priv,
150                                         info->fix.line_length,
151                                         var->yoffset + var->yres)) {
152                 DRM_ERROR("Requested geom can not fit in framebuffer\n");
153                 return -EINVAL;
154         }
155
156         return 0;
157 }
158
159 static int vmw_fb_set_par(struct fb_info *info)
160 {
161         struct vmw_fb_par *par = info->par;
162         struct vmw_private *vmw_priv = par->vmw_priv;
163         int ret;
164
165         ret = vmw_kms_write_svga(vmw_priv, info->var.xres, info->var.yres,
166                                  info->fix.line_length,
167                                  par->bpp, par->depth);
168         if (ret)
169                 return ret;
170
171         if (vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) {
172                 /* TODO check if pitch and offset changes */
173                 vmw_write(vmw_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 1);
174                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, 0);
175                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_IS_PRIMARY, true);
176                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_X, info->var.xoffset);
177                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y, info->var.yoffset);
178                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, info->var.xres);
179                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, info->var.yres);
180                 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
181         }
182
183         /* This is really helpful since if this fails the user
184          * can probably not see anything on the screen.
185          */
186         WARN_ON(vmw_read(vmw_priv, SVGA_REG_FB_OFFSET) != 0);
187
188         return 0;
189 }
190
191 static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
192                               struct fb_info *info)
193 {
194         return 0;
195 }
196
197 static int vmw_fb_blank(int blank, struct fb_info *info)
198 {
199         return 0;
200 }
201
202 /*
203  * Dirty code
204  */
205
206 static void vmw_fb_dirty_flush(struct vmw_fb_par *par)
207 {
208         struct vmw_private *vmw_priv = par->vmw_priv;
209         struct fb_info *info = vmw_priv->fb_info;
210         int stride = (info->fix.line_length / 4);
211         int *src = (int *)info->screen_base;
212         __le32 __iomem *vram_mem = par->bo_ptr;
213         unsigned long flags;
214         unsigned x, y, w, h;
215         int i, k;
216         struct {
217                 uint32_t header;
218                 SVGAFifoCmdUpdate body;
219         } *cmd;
220
221         if (vmw_priv->suspended)
222                 return;
223
224         spin_lock_irqsave(&par->dirty.lock, flags);
225         if (!par->dirty.active) {
226                 spin_unlock_irqrestore(&par->dirty.lock, flags);
227                 return;
228         }
229         x = par->dirty.x1;
230         y = par->dirty.y1;
231         w = min(par->dirty.x2, info->var.xres) - x;
232         h = min(par->dirty.y2, info->var.yres) - y;
233         par->dirty.x1 = par->dirty.x2 = 0;
234         par->dirty.y1 = par->dirty.y2 = 0;
235         spin_unlock_irqrestore(&par->dirty.lock, flags);
236
237         for (i = y * stride; i < info->fix.smem_len / 4; i += stride) {
238                 for (k = i+x; k < i+x+w && k < info->fix.smem_len / 4; k++)
239                         iowrite32(src[k], vram_mem + k);
240         }
241
242 #if 0
243         DRM_INFO("%s, (%u, %u) (%ux%u)\n", __func__, x, y, w, h);
244 #endif
245
246         cmd = vmw_fifo_reserve(vmw_priv, sizeof(*cmd));
247         if (unlikely(cmd == NULL)) {
248                 DRM_ERROR("Fifo reserve failed.\n");
249                 return;
250         }
251
252         cmd->header = cpu_to_le32(SVGA_CMD_UPDATE);
253         cmd->body.x = cpu_to_le32(x);
254         cmd->body.y = cpu_to_le32(y);
255         cmd->body.width = cpu_to_le32(w);
256         cmd->body.height = cpu_to_le32(h);
257         vmw_fifo_commit(vmw_priv, sizeof(*cmd));
258 }
259
260 static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
261                               unsigned x1, unsigned y1,
262                               unsigned width, unsigned height)
263 {
264         struct fb_info *info = par->vmw_priv->fb_info;
265         unsigned long flags;
266         unsigned x2 = x1 + width;
267         unsigned y2 = y1 + height;
268
269         spin_lock_irqsave(&par->dirty.lock, flags);
270         if (par->dirty.x1 == par->dirty.x2) {
271                 par->dirty.x1 = x1;
272                 par->dirty.y1 = y1;
273                 par->dirty.x2 = x2;
274                 par->dirty.y2 = y2;
275                 /* if we are active start the dirty work
276                  * we share the work with the defio system */
277                 if (par->dirty.active)
278                         schedule_delayed_work(&info->deferred_work, VMW_DIRTY_DELAY);
279         } else {
280                 if (x1 < par->dirty.x1)
281                         par->dirty.x1 = x1;
282                 if (y1 < par->dirty.y1)
283                         par->dirty.y1 = y1;
284                 if (x2 > par->dirty.x2)
285                         par->dirty.x2 = x2;
286                 if (y2 > par->dirty.y2)
287                         par->dirty.y2 = y2;
288         }
289         spin_unlock_irqrestore(&par->dirty.lock, flags);
290 }
291
292 static void vmw_deferred_io(struct fb_info *info,
293                             struct list_head *pagelist)
294 {
295         struct vmw_fb_par *par = info->par;
296         unsigned long start, end, min, max;
297         unsigned long flags;
298         struct page *page;
299         int y1, y2;
300
301         min = ULONG_MAX;
302         max = 0;
303         list_for_each_entry(page, pagelist, lru) {
304                 start = page->index << PAGE_SHIFT;
305                 end = start + PAGE_SIZE - 1;
306                 min = min(min, start);
307                 max = max(max, end);
308         }
309
310         if (min < max) {
311                 y1 = min / info->fix.line_length;
312                 y2 = (max / info->fix.line_length) + 1;
313
314                 spin_lock_irqsave(&par->dirty.lock, flags);
315                 par->dirty.x1 = 0;
316                 par->dirty.y1 = y1;
317                 par->dirty.x2 = info->var.xres;
318                 par->dirty.y2 = y2;
319                 spin_unlock_irqrestore(&par->dirty.lock, flags);
320         }
321
322         vmw_fb_dirty_flush(par);
323 };
324
325 struct fb_deferred_io vmw_defio = {
326         .delay          = VMW_DIRTY_DELAY,
327         .deferred_io    = vmw_deferred_io,
328 };
329
330 /*
331  * Draw code
332  */
333
334 static void vmw_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
335 {
336         cfb_fillrect(info, rect);
337         vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
338                           rect->width, rect->height);
339 }
340
341 static void vmw_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
342 {
343         cfb_copyarea(info, region);
344         vmw_fb_dirty_mark(info->par, region->dx, region->dy,
345                           region->width, region->height);
346 }
347
348 static void vmw_fb_imageblit(struct fb_info *info, const struct fb_image *image)
349 {
350         cfb_imageblit(info, image);
351         vmw_fb_dirty_mark(info->par, image->dx, image->dy,
352                           image->width, image->height);
353 }
354
355 /*
356  * Bring up code
357  */
358
359 static struct fb_ops vmw_fb_ops = {
360         .owner = THIS_MODULE,
361         .fb_check_var = vmw_fb_check_var,
362         .fb_set_par = vmw_fb_set_par,
363         .fb_setcolreg = vmw_fb_setcolreg,
364         .fb_fillrect = vmw_fb_fillrect,
365         .fb_copyarea = vmw_fb_copyarea,
366         .fb_imageblit = vmw_fb_imageblit,
367         .fb_pan_display = vmw_fb_pan_display,
368         .fb_blank = vmw_fb_blank,
369 };
370
371 static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
372                             size_t size, struct vmw_dma_buffer **out)
373 {
374         struct vmw_dma_buffer *vmw_bo;
375         struct ttm_placement ne_placement = vmw_vram_ne_placement;
376         int ret;
377
378         ne_placement.lpfn = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
379
380         /* interuptable? */
381         ret = ttm_write_lock(&vmw_priv->fbdev_master.lock, false);
382         if (unlikely(ret != 0))
383                 return ret;
384
385         vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
386         if (!vmw_bo)
387                 goto err_unlock;
388
389         ret = vmw_dmabuf_init(vmw_priv, vmw_bo, size,
390                               &ne_placement,
391                               false,
392                               &vmw_dmabuf_bo_free);
393         if (unlikely(ret != 0))
394                 goto err_unlock; /* init frees the buffer on failure */
395
396         *out = vmw_bo;
397
398         ttm_write_unlock(&vmw_priv->fbdev_master.lock);
399
400         return 0;
401
402 err_unlock:
403         ttm_write_unlock(&vmw_priv->fbdev_master.lock);
404         return ret;
405 }
406
407 int vmw_fb_init(struct vmw_private *vmw_priv)
408 {
409         struct device *device = &vmw_priv->dev->pdev->dev;
410         struct vmw_fb_par *par;
411         struct fb_info *info;
412         unsigned initial_width, initial_height;
413         unsigned fb_width, fb_height;
414         unsigned fb_bpp, fb_depth, fb_offset, fb_pitch, fb_size;
415         int ret;
416
417         fb_bpp = 32;
418         fb_depth = 24;
419
420         /* XXX As shouldn't these be as well. */
421         fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
422         fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);
423
424         initial_width = min(vmw_priv->initial_width, fb_width);
425         initial_height = min(vmw_priv->initial_height, fb_height);
426
427         fb_pitch = fb_width * fb_bpp / 8;
428         fb_size = fb_pitch * fb_height;
429         fb_offset = vmw_read(vmw_priv, SVGA_REG_FB_OFFSET);
430
431         info = framebuffer_alloc(sizeof(*par), device);
432         if (!info)
433                 return -ENOMEM;
434
435         /*
436          * Par
437          */
438         vmw_priv->fb_info = info;
439         par = info->par;
440         par->vmw_priv = vmw_priv;
441         par->depth = fb_depth;
442         par->bpp = fb_bpp;
443         par->vmalloc = NULL;
444         par->max_width = fb_width;
445         par->max_height = fb_height;
446
447         /*
448          * Create buffers and alloc memory
449          */
450         par->vmalloc = vmalloc(fb_size);
451         if (unlikely(par->vmalloc == NULL)) {
452                 ret = -ENOMEM;
453                 goto err_free;
454         }
455
456         ret = vmw_fb_create_bo(vmw_priv, fb_size, &par->vmw_bo);
457         if (unlikely(ret != 0))
458                 goto err_free;
459
460         ret = ttm_bo_kmap(&par->vmw_bo->base,
461                           0,
462                           par->vmw_bo->base.num_pages,
463                           &par->map);
464         if (unlikely(ret != 0))
465                 goto err_unref;
466         par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
467         par->bo_size = fb_size;
468
469         /*
470          * Fixed and var
471          */
472         strcpy(info->fix.id, "svgadrmfb");
473         info->fix.type = FB_TYPE_PACKED_PIXELS;
474         info->fix.visual = FB_VISUAL_TRUECOLOR;
475         info->fix.type_aux = 0;
476         info->fix.xpanstep = 1; /* doing it in hw */
477         info->fix.ypanstep = 1; /* doing it in hw */
478         info->fix.ywrapstep = 0;
479         info->fix.accel = FB_ACCEL_NONE;
480         info->fix.line_length = fb_pitch;
481
482         info->fix.smem_start = 0;
483         info->fix.smem_len = fb_size;
484
485         info->pseudo_palette = par->pseudo_palette;
486         info->screen_base = par->vmalloc;
487         info->screen_size = fb_size;
488
489         info->flags = FBINFO_DEFAULT;
490         info->fbops = &vmw_fb_ops;
491
492         /* 24 depth per default */
493         info->var.red.offset = 16;
494         info->var.green.offset = 8;
495         info->var.blue.offset = 0;
496         info->var.red.length = 8;
497         info->var.green.length = 8;
498         info->var.blue.length = 8;
499         info->var.transp.offset = 0;
500         info->var.transp.length = 0;
501
502         info->var.xres_virtual = fb_width;
503         info->var.yres_virtual = fb_height;
504         info->var.bits_per_pixel = par->bpp;
505         info->var.xoffset = 0;
506         info->var.yoffset = 0;
507         info->var.activate = FB_ACTIVATE_NOW;
508         info->var.height = -1;
509         info->var.width = -1;
510
511         info->var.xres = initial_width;
512         info->var.yres = initial_height;
513
514         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
515
516         info->apertures = alloc_apertures(1);
517         if (!info->apertures) {
518                 ret = -ENOMEM;
519                 goto err_aper;
520         }
521         info->apertures->ranges[0].base = vmw_priv->vram_start;
522         info->apertures->ranges[0].size = vmw_priv->vram_size;
523
524         /*
525          * Dirty & Deferred IO
526          */
527         par->dirty.x1 = par->dirty.x2 = 0;
528         par->dirty.y1 = par->dirty.y2 = 0;
529         par->dirty.active = true;
530         spin_lock_init(&par->dirty.lock);
531         info->fbdefio = &vmw_defio;
532         fb_deferred_io_init(info);
533
534         ret = register_framebuffer(info);
535         if (unlikely(ret != 0))
536                 goto err_defio;
537
538         return 0;
539
540 err_defio:
541         fb_deferred_io_cleanup(info);
542 err_aper:
543         ttm_bo_kunmap(&par->map);
544 err_unref:
545         ttm_bo_unref((struct ttm_buffer_object **)&par->vmw_bo);
546 err_free:
547         vfree(par->vmalloc);
548         framebuffer_release(info);
549         vmw_priv->fb_info = NULL;
550
551         return ret;
552 }
553
554 int vmw_fb_close(struct vmw_private *vmw_priv)
555 {
556         struct fb_info *info;
557         struct vmw_fb_par *par;
558         struct ttm_buffer_object *bo;
559
560         if (!vmw_priv->fb_info)
561                 return 0;
562
563         info = vmw_priv->fb_info;
564         par = info->par;
565         bo = &par->vmw_bo->base;
566         par->vmw_bo = NULL;
567
568         /* ??? order */
569         fb_deferred_io_cleanup(info);
570         unregister_framebuffer(info);
571
572         ttm_bo_kunmap(&par->map);
573         ttm_bo_unref(&bo);
574
575         vfree(par->vmalloc);
576         framebuffer_release(info);
577
578         return 0;
579 }
580
581 int vmw_fb_off(struct vmw_private *vmw_priv)
582 {
583         struct fb_info *info;
584         struct vmw_fb_par *par;
585         unsigned long flags;
586
587         if (!vmw_priv->fb_info)
588                 return -EINVAL;
589
590         info = vmw_priv->fb_info;
591         par = info->par;
592
593         spin_lock_irqsave(&par->dirty.lock, flags);
594         par->dirty.active = false;
595         spin_unlock_irqrestore(&par->dirty.lock, flags);
596
597         flush_delayed_work(&info->deferred_work);
598
599         par->bo_ptr = NULL;
600         ttm_bo_kunmap(&par->map);
601
602         vmw_dmabuf_unpin(vmw_priv, par->vmw_bo, false);
603
604         return 0;
605 }
606
607 int vmw_fb_on(struct vmw_private *vmw_priv)
608 {
609         struct fb_info *info;
610         struct vmw_fb_par *par;
611         unsigned long flags;
612         bool dummy;
613         int ret;
614
615         if (!vmw_priv->fb_info)
616                 return -EINVAL;
617
618         info = vmw_priv->fb_info;
619         par = info->par;
620
621         /* we are already active */
622         if (par->bo_ptr != NULL)
623                 return 0;
624
625         /* Make sure that all overlays are stoped when we take over */
626         vmw_overlay_stop_all(vmw_priv);
627
628         ret = vmw_dmabuf_to_start_of_vram(vmw_priv, par->vmw_bo, true, false);
629         if (unlikely(ret != 0)) {
630                 DRM_ERROR("could not move buffer to start of VRAM\n");
631                 goto err_no_buffer;
632         }
633
634         ret = ttm_bo_kmap(&par->vmw_bo->base,
635                           0,
636                           par->vmw_bo->base.num_pages,
637                           &par->map);
638         BUG_ON(ret != 0);
639         par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &dummy);
640
641         spin_lock_irqsave(&par->dirty.lock, flags);
642         par->dirty.active = true;
643         spin_unlock_irqrestore(&par->dirty.lock, flags);
644
645 err_no_buffer:
646         vmw_fb_set_par(info);
647
648         vmw_fb_dirty_mark(par, 0, 0, info->var.xres, info->var.yres);
649
650         /* If there already was stuff dirty we wont
651          * schedule a new work, so lets do it now */
652         schedule_delayed_work(&info->deferred_work, 0);
653
654         return 0;
655 }