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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 <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
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 var->xres * var->bits_per_pixel/8,
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 info->fix.line_length = info->var.xres * info->var.bits_per_pixel/8;
166
167 ret = vmw_kms_write_svga(vmw_priv, info->var.xres, info->var.yres,
168 info->fix.line_length,
169 par->bpp, par->depth);
170 if (ret)
171 return ret;
172
173 if (vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY) {
174 /* TODO check if pitch and offset changes */
175 vmw_write(vmw_priv, SVGA_REG_NUM_GUEST_DISPLAYS, 1);
176 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, 0);
177 vmw_write(vmw_priv, SVGA_REG_DISPLAY_IS_PRIMARY, true);
178 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_X, info->var.xoffset);
179 vmw_write(vmw_priv, SVGA_REG_DISPLAY_POSITION_Y, info->var.yoffset);
180 vmw_write(vmw_priv, SVGA_REG_DISPLAY_WIDTH, info->var.xres);
181 vmw_write(vmw_priv, SVGA_REG_DISPLAY_HEIGHT, info->var.yres);
182 vmw_write(vmw_priv, SVGA_REG_BYTES_PER_LINE, info->fix.line_length);
183 vmw_write(vmw_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
184 }
185
186 /* This is really helpful since if this fails the user
187 * can probably not see anything on the screen.
188 */
189 WARN_ON(vmw_read(vmw_priv, SVGA_REG_FB_OFFSET) != 0);
190
191 return 0;
192}
193
194static int vmw_fb_pan_display(struct fb_var_screeninfo *var,
195 struct fb_info *info)
196{
197 return 0;
198}
199
200static int vmw_fb_blank(int blank, struct fb_info *info)
201{
202 return 0;
203}
204
205/*
206 * Dirty code
207 */
208
209static void vmw_fb_dirty_flush(struct vmw_fb_par *par)
210{
211 struct vmw_private *vmw_priv = par->vmw_priv;
212 struct fb_info *info = vmw_priv->fb_info;
213 int stride = (info->fix.line_length / 4);
214 int *src = (int *)info->screen_base;
215 __le32 __iomem *vram_mem = par->bo_ptr;
216 unsigned long flags;
217 unsigned x, y, w, h;
218 int i, k;
219 struct {
220 uint32_t header;
221 SVGAFifoCmdUpdate body;
222 } *cmd;
223
224 if (vmw_priv->suspended)
225 return;
226
227 spin_lock_irqsave(&par->dirty.lock, flags);
228 if (!par->dirty.active) {
229 spin_unlock_irqrestore(&par->dirty.lock, flags);
230 return;
231 }
232 x = par->dirty.x1;
233 y = par->dirty.y1;
234 w = min(par->dirty.x2, info->var.xres) - x;
235 h = min(par->dirty.y2, info->var.yres) - y;
236 par->dirty.x1 = par->dirty.x2 = 0;
237 par->dirty.y1 = par->dirty.y2 = 0;
238 spin_unlock_irqrestore(&par->dirty.lock, flags);
239
240 for (i = y * stride; i < info->fix.smem_len / 4; i += stride) {
241 for (k = i+x; k < i+x+w && k < info->fix.smem_len / 4; k++)
242 iowrite32(src[k], vram_mem + k);
243 }
244
245#if 0
246 DRM_INFO("%s, (%u, %u) (%ux%u)\n", __func__, x, y, w, h);
247#endif
248
249 cmd = vmw_fifo_reserve(vmw_priv, sizeof(*cmd));
250 if (unlikely(cmd == NULL)) {
251 DRM_ERROR("Fifo reserve failed.\n");
252 return;
253 }
254
255 cmd->header = cpu_to_le32(SVGA_CMD_UPDATE);
256 cmd->body.x = cpu_to_le32(x);
257 cmd->body.y = cpu_to_le32(y);
258 cmd->body.width = cpu_to_le32(w);
259 cmd->body.height = cpu_to_le32(h);
260 vmw_fifo_commit(vmw_priv, sizeof(*cmd));
261}
262
263static void vmw_fb_dirty_mark(struct vmw_fb_par *par,
264 unsigned x1, unsigned y1,
265 unsigned width, unsigned height)
266{
267 struct fb_info *info = par->vmw_priv->fb_info;
268 unsigned long flags;
269 unsigned x2 = x1 + width;
270 unsigned y2 = y1 + height;
271
272 spin_lock_irqsave(&par->dirty.lock, flags);
273 if (par->dirty.x1 == par->dirty.x2) {
274 par->dirty.x1 = x1;
275 par->dirty.y1 = y1;
276 par->dirty.x2 = x2;
277 par->dirty.y2 = y2;
278 /* if we are active start the dirty work
279 * we share the work with the defio system */
280 if (par->dirty.active)
281 schedule_delayed_work(&info->deferred_work, VMW_DIRTY_DELAY);
282 } else {
283 if (x1 < par->dirty.x1)
284 par->dirty.x1 = x1;
285 if (y1 < par->dirty.y1)
286 par->dirty.y1 = y1;
287 if (x2 > par->dirty.x2)
288 par->dirty.x2 = x2;
289 if (y2 > par->dirty.y2)
290 par->dirty.y2 = y2;
291 }
292 spin_unlock_irqrestore(&par->dirty.lock, flags);
293}
294
295static void vmw_deferred_io(struct fb_info *info,
296 struct list_head *pagelist)
297{
298 struct vmw_fb_par *par = info->par;
299 unsigned long start, end, min, max;
300 unsigned long flags;
301 struct page *page;
302 int y1, y2;
303
304 min = ULONG_MAX;
305 max = 0;
306 list_for_each_entry(page, pagelist, lru) {
307 start = page->index << PAGE_SHIFT;
308 end = start + PAGE_SIZE - 1;
309 min = min(min, start);
310 max = max(max, end);
311 }
312
313 if (min < max) {
314 y1 = min / info->fix.line_length;
315 y2 = (max / info->fix.line_length) + 1;
316
317 spin_lock_irqsave(&par->dirty.lock, flags);
318 par->dirty.x1 = 0;
319 par->dirty.y1 = y1;
320 par->dirty.x2 = info->var.xres;
321 par->dirty.y2 = y2;
322 spin_unlock_irqrestore(&par->dirty.lock, flags);
323 }
324
325 vmw_fb_dirty_flush(par);
326};
327
328struct fb_deferred_io vmw_defio = {
329 .delay = VMW_DIRTY_DELAY,
330 .deferred_io = vmw_deferred_io,
331};
332
333/*
334 * Draw code
335 */
336
337static void vmw_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
338{
339 cfb_fillrect(info, rect);
340 vmw_fb_dirty_mark(info->par, rect->dx, rect->dy,
341 rect->width, rect->height);
342}
343
344static void vmw_fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
345{
346 cfb_copyarea(info, region);
347 vmw_fb_dirty_mark(info->par, region->dx, region->dy,
348 region->width, region->height);
349}
350
351static void vmw_fb_imageblit(struct fb_info *info, const struct fb_image *image)
352{
353 cfb_imageblit(info, image);
354 vmw_fb_dirty_mark(info->par, image->dx, image->dy,
355 image->width, image->height);
356}
357
358/*
359 * Bring up code
360 */
361
362static struct fb_ops vmw_fb_ops = {
363 .owner = THIS_MODULE,
364 .fb_check_var = vmw_fb_check_var,
365 .fb_set_par = vmw_fb_set_par,
366 .fb_setcolreg = vmw_fb_setcolreg,
367 .fb_fillrect = vmw_fb_fillrect,
368 .fb_copyarea = vmw_fb_copyarea,
369 .fb_imageblit = vmw_fb_imageblit,
370 .fb_pan_display = vmw_fb_pan_display,
371 .fb_blank = vmw_fb_blank,
372};
373
374static int vmw_fb_create_bo(struct vmw_private *vmw_priv,
375 size_t size, struct vmw_dma_buffer **out)
376{
377 struct vmw_dma_buffer *vmw_bo;
378 struct ttm_placement ne_placement = vmw_vram_ne_placement;
379 int ret;
380
381 ne_placement.lpfn = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
382
383 (void) ttm_write_lock(&vmw_priv->reservation_sem, false);
384
385 vmw_bo = kmalloc(sizeof(*vmw_bo), GFP_KERNEL);
386 if (!vmw_bo) {
387 ret = -ENOMEM;
388 goto err_unlock;
389 }
390
391 ret = vmw_dmabuf_init(vmw_priv, vmw_bo, size,
392 &ne_placement,
393 false,
394 &vmw_dmabuf_bo_free);
395 if (unlikely(ret != 0))
396 goto err_unlock; /* init frees the buffer on failure */
397
398 *out = vmw_bo;
399
400 ttm_write_unlock(&vmw_priv->fbdev_master.lock);
401
402 return 0;
403
404err_unlock:
405 ttm_write_unlock(&vmw_priv->fbdev_master.lock);
406 return ret;
407}
408
409int vmw_fb_init(struct vmw_private *vmw_priv)
410{
411 struct device *device = &vmw_priv->dev->pdev->dev;
412 struct vmw_fb_par *par;
413 struct fb_info *info;
414 unsigned initial_width, initial_height;
415 unsigned fb_width, fb_height;
416 unsigned fb_bpp, fb_depth, fb_offset, fb_pitch, fb_size;
417 int ret;
418
419 fb_bpp = 32;
420 fb_depth = 24;
421
422 /* XXX As shouldn't these be as well. */
423 fb_width = min(vmw_priv->fb_max_width, (unsigned)2048);
424 fb_height = min(vmw_priv->fb_max_height, (unsigned)2048);
425
426 initial_width = min(vmw_priv->initial_width, fb_width);
427 initial_height = min(vmw_priv->initial_height, fb_height);
428
429 fb_pitch = fb_width * fb_bpp / 8;
430 fb_size = fb_pitch * fb_height;
431 fb_offset = vmw_read(vmw_priv, SVGA_REG_FB_OFFSET);
432
433 info = framebuffer_alloc(sizeof(*par), device);
434 if (!info)
435 return -ENOMEM;
436
437 /*
438 * Par
439 */
440 vmw_priv->fb_info = info;
441 par = info->par;
442 par->vmw_priv = vmw_priv;
443 par->depth = fb_depth;
444 par->bpp = fb_bpp;
445 par->vmalloc = NULL;
446 par->max_width = fb_width;
447 par->max_height = fb_height;
448
449 /*
450 * Create buffers and alloc memory
451 */
452 par->vmalloc = vmalloc(fb_size);
453 if (unlikely(par->vmalloc == NULL)) {
454 ret = -ENOMEM;
455 goto err_free;
456 }
457
458 ret = vmw_fb_create_bo(vmw_priv, fb_size, &par->vmw_bo);
459 if (unlikely(ret != 0))
460 goto err_free;
461
462 ret = ttm_bo_kmap(&par->vmw_bo->base,
463 0,
464 par->vmw_bo->base.num_pages,
465 &par->map);
466 if (unlikely(ret != 0))
467 goto err_unref;
468 par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
469 par->bo_size = fb_size;
470
471 /*
472 * Fixed and var
473 */
474 strcpy(info->fix.id, "svgadrmfb");
475 info->fix.type = FB_TYPE_PACKED_PIXELS;
476 info->fix.visual = FB_VISUAL_TRUECOLOR;
477 info->fix.type_aux = 0;
478 info->fix.xpanstep = 1; /* doing it in hw */
479 info->fix.ypanstep = 1; /* doing it in hw */
480 info->fix.ywrapstep = 0;
481 info->fix.accel = FB_ACCEL_NONE;
482 info->fix.line_length = fb_pitch;
483
484 info->fix.smem_start = 0;
485 info->fix.smem_len = fb_size;
486
487 info->pseudo_palette = par->pseudo_palette;
488 info->screen_base = par->vmalloc;
489 info->screen_size = fb_size;
490
491 info->flags = FBINFO_DEFAULT;
492 info->fbops = &vmw_fb_ops;
493
494 /* 24 depth per default */
495 info->var.red.offset = 16;
496 info->var.green.offset = 8;
497 info->var.blue.offset = 0;
498 info->var.red.length = 8;
499 info->var.green.length = 8;
500 info->var.blue.length = 8;
501 info->var.transp.offset = 0;
502 info->var.transp.length = 0;
503
504 info->var.xres_virtual = fb_width;
505 info->var.yres_virtual = fb_height;
506 info->var.bits_per_pixel = par->bpp;
507 info->var.xoffset = 0;
508 info->var.yoffset = 0;
509 info->var.activate = FB_ACTIVATE_NOW;
510 info->var.height = -1;
511 info->var.width = -1;
512
513 info->var.xres = initial_width;
514 info->var.yres = initial_height;
515
516 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
517
518 info->apertures = alloc_apertures(1);
519 if (!info->apertures) {
520 ret = -ENOMEM;
521 goto err_aper;
522 }
523 info->apertures->ranges[0].base = vmw_priv->vram_start;
524 info->apertures->ranges[0].size = vmw_priv->vram_size;
525
526 /*
527 * Dirty & Deferred IO
528 */
529 par->dirty.x1 = par->dirty.x2 = 0;
530 par->dirty.y1 = par->dirty.y2 = 0;
531 par->dirty.active = true;
532 spin_lock_init(&par->dirty.lock);
533 info->fbdefio = &vmw_defio;
534 fb_deferred_io_init(info);
535
536 ret = register_framebuffer(info);
537 if (unlikely(ret != 0))
538 goto err_defio;
539
540 return 0;
541
542err_defio:
543 fb_deferred_io_cleanup(info);
544err_aper:
545 ttm_bo_kunmap(&par->map);
546err_unref:
547 ttm_bo_unref((struct ttm_buffer_object **)&par->vmw_bo);
548err_free:
549 vfree(par->vmalloc);
550 framebuffer_release(info);
551 vmw_priv->fb_info = NULL;
552
553 return ret;
554}
555
556int vmw_fb_close(struct vmw_private *vmw_priv)
557{
558 struct fb_info *info;
559 struct vmw_fb_par *par;
560 struct ttm_buffer_object *bo;
561
562 if (!vmw_priv->fb_info)
563 return 0;
564
565 info = vmw_priv->fb_info;
566 par = info->par;
567 bo = &par->vmw_bo->base;
568 par->vmw_bo = NULL;
569
570 /* ??? order */
571 fb_deferred_io_cleanup(info);
572 unregister_framebuffer(info);
573
574 ttm_bo_kunmap(&par->map);
575 ttm_bo_unref(&bo);
576
577 vfree(par->vmalloc);
578 framebuffer_release(info);
579
580 return 0;
581}
582
583int vmw_fb_off(struct vmw_private *vmw_priv)
584{
585 struct fb_info *info;
586 struct vmw_fb_par *par;
587 unsigned long flags;
588
589 if (!vmw_priv->fb_info)
590 return -EINVAL;
591
592 info = vmw_priv->fb_info;
593 par = info->par;
594
595 spin_lock_irqsave(&par->dirty.lock, flags);
596 par->dirty.active = false;
597 spin_unlock_irqrestore(&par->dirty.lock, flags);
598
599 flush_delayed_work(&info->deferred_work);
600
601 par->bo_ptr = NULL;
602 ttm_bo_kunmap(&par->map);
603
604 vmw_dmabuf_unpin(vmw_priv, par->vmw_bo, false);
605
606 return 0;
607}
608
609int vmw_fb_on(struct vmw_private *vmw_priv)
610{
611 struct fb_info *info;
612 struct vmw_fb_par *par;
613 unsigned long flags;
614 bool dummy;
615 int ret;
616
617 if (!vmw_priv->fb_info)
618 return -EINVAL;
619
620 info = vmw_priv->fb_info;
621 par = info->par;
622
623 /* we are already active */
624 if (par->bo_ptr != NULL)
625 return 0;
626
627 /* Make sure that all overlays are stoped when we take over */
628 vmw_overlay_stop_all(vmw_priv);
629
630 ret = vmw_dmabuf_to_start_of_vram(vmw_priv, par->vmw_bo, true, false);
631 if (unlikely(ret != 0)) {
632 DRM_ERROR("could not move buffer to start of VRAM\n");
633 goto err_no_buffer;
634 }
635
636 ret = ttm_bo_kmap(&par->vmw_bo->base,
637 0,
638 par->vmw_bo->base.num_pages,
639 &par->map);
640 BUG_ON(ret != 0);
641 par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &dummy);
642
643 spin_lock_irqsave(&par->dirty.lock, flags);
644 par->dirty.active = true;
645 spin_unlock_irqrestore(&par->dirty.lock, flags);
646
647err_no_buffer:
648 vmw_fb_set_par(info);
649
650 vmw_fb_dirty_mark(par, 0, 0, info->var.xres, info->var.yres);
651
652 /* If there already was stuff dirty we wont
653 * schedule a new work, so lets do it now */
654 schedule_delayed_work(&info->deferred_work, 0);
655
656 return 0;
657}