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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 "drmP.h"
32#include "vmwgfx_drv.h"
33
34#include "ttm/ttm_placement.h"
35
36#define VMW_DIRTY_DELAY (HZ / 30)
37
38struct 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
68static 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
95static 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
159static 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
191static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
192 struct fb_info *info)
193{
194 return 0;
195}
196
197static int vmw_fb_blank(int blank, struct fb_info *info)
198{
199 return 0;
200}
201
202/*
203 * Dirty code
204 */
205
206static 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
260static 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
292static 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
325struct fb_deferred_io vmw_defio = {
326 .delay = VMW_DIRTY_DELAY,
327 .deferred_io = vmw_deferred_io,
328};
329
330/*
331 * Draw code
332 */
333
334static 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
341static 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
348static 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
359static 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
371static 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
402err_unlock:
403 ttm_write_unlock(&vmw_priv->fbdev_master.lock);
404 return ret;
405}
406
407int 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
540err_defio:
541 fb_deferred_io_cleanup(info);
542err_aper:
543 ttm_bo_kunmap(&par->map);
544err_unref:
545 ttm_bo_unref((struct ttm_buffer_object **)&par->vmw_bo);
546err_free:
547 vfree(par->vmalloc);
548 framebuffer_release(info);
549 vmw_priv->fb_info = NULL;
550
551 return ret;
552}
553
554int 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
581int 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_sync(&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
607int 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
645err_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}