xref: /openbmc/qemu/hw/display/vmware_vga.c (revision 75bbe5e5)
1 /*
2  * QEMU VMware-SVGA "chipset".
3  *
4  * Copyright (c) 2007 Andrzej Zaborowski  <balrog@zabor.org>
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 #include "qemu/osdep.h"
26 #include "qemu/module.h"
27 #include "qemu/units.h"
28 #include "qapi/error.h"
29 #include "qemu/log.h"
30 #include "hw/loader.h"
31 #include "trace.h"
32 #include "hw/pci/pci.h"
33 #include "hw/qdev-properties.h"
34 #include "migration/vmstate.h"
35 #include "qom/object.h"
36 
37 #undef VERBOSE
38 #define HW_RECT_ACCEL
39 #define HW_FILL_ACCEL
40 #define HW_MOUSE_ACCEL
41 
42 #include "vga_int.h"
43 
44 /* See http://vmware-svga.sf.net/ for some documentation on VMWare SVGA */
45 
46 struct vmsvga_state_s {
47     VGACommonState vga;
48 
49     int invalidated;
50     int enable;
51     int config;
52     struct {
53         int id;
54         int x;
55         int y;
56         int on;
57     } cursor;
58 
59     int index;
60     int scratch_size;
61     uint32_t *scratch;
62     int new_width;
63     int new_height;
64     int new_depth;
65     uint32_t guest;
66     uint32_t svgaid;
67     int syncing;
68 
69     MemoryRegion fifo_ram;
70     uint8_t *fifo_ptr;
71     unsigned int fifo_size;
72 
73     uint32_t *fifo;
74     uint32_t fifo_min;
75     uint32_t fifo_max;
76     uint32_t fifo_next;
77     uint32_t fifo_stop;
78 
79 #define REDRAW_FIFO_LEN  512
80     struct vmsvga_rect_s {
81         int x, y, w, h;
82     } redraw_fifo[REDRAW_FIFO_LEN];
83     int redraw_fifo_last;
84 };
85 
86 #define TYPE_VMWARE_SVGA "vmware-svga"
87 
88 DECLARE_INSTANCE_CHECKER(struct pci_vmsvga_state_s, VMWARE_SVGA,
89                          TYPE_VMWARE_SVGA)
90 
91 struct pci_vmsvga_state_s {
92     /*< private >*/
93     PCIDevice parent_obj;
94     /*< public >*/
95 
96     struct vmsvga_state_s chip;
97     MemoryRegion io_bar;
98 };
99 
100 #define SVGA_MAGIC              0x900000UL
101 #define SVGA_MAKE_ID(ver)       (SVGA_MAGIC << 8 | (ver))
102 #define SVGA_ID_0               SVGA_MAKE_ID(0)
103 #define SVGA_ID_1               SVGA_MAKE_ID(1)
104 #define SVGA_ID_2               SVGA_MAKE_ID(2)
105 
106 #define SVGA_LEGACY_BASE_PORT   0x4560
107 #define SVGA_INDEX_PORT         0x0
108 #define SVGA_VALUE_PORT         0x1
109 #define SVGA_BIOS_PORT          0x2
110 
111 #define SVGA_VERSION_2
112 
113 #ifdef SVGA_VERSION_2
114 # define SVGA_ID                SVGA_ID_2
115 # define SVGA_IO_BASE           SVGA_LEGACY_BASE_PORT
116 # define SVGA_IO_MUL            1
117 # define SVGA_FIFO_SIZE         0x10000
118 # define SVGA_PCI_DEVICE_ID     PCI_DEVICE_ID_VMWARE_SVGA2
119 #else
120 # define SVGA_ID                SVGA_ID_1
121 # define SVGA_IO_BASE           SVGA_LEGACY_BASE_PORT
122 # define SVGA_IO_MUL            4
123 # define SVGA_FIFO_SIZE         0x10000
124 # define SVGA_PCI_DEVICE_ID     PCI_DEVICE_ID_VMWARE_SVGA
125 #endif
126 
127 enum {
128     /* ID 0, 1 and 2 registers */
129     SVGA_REG_ID = 0,
130     SVGA_REG_ENABLE = 1,
131     SVGA_REG_WIDTH = 2,
132     SVGA_REG_HEIGHT = 3,
133     SVGA_REG_MAX_WIDTH = 4,
134     SVGA_REG_MAX_HEIGHT = 5,
135     SVGA_REG_DEPTH = 6,
136     SVGA_REG_BITS_PER_PIXEL = 7,        /* Current bpp in the guest */
137     SVGA_REG_PSEUDOCOLOR = 8,
138     SVGA_REG_RED_MASK = 9,
139     SVGA_REG_GREEN_MASK = 10,
140     SVGA_REG_BLUE_MASK = 11,
141     SVGA_REG_BYTES_PER_LINE = 12,
142     SVGA_REG_FB_START = 13,
143     SVGA_REG_FB_OFFSET = 14,
144     SVGA_REG_VRAM_SIZE = 15,
145     SVGA_REG_FB_SIZE = 16,
146 
147     /* ID 1 and 2 registers */
148     SVGA_REG_CAPABILITIES = 17,
149     SVGA_REG_MEM_START = 18,            /* Memory for command FIFO */
150     SVGA_REG_MEM_SIZE = 19,
151     SVGA_REG_CONFIG_DONE = 20,          /* Set when memory area configured */
152     SVGA_REG_SYNC = 21,                 /* Write to force synchronization */
153     SVGA_REG_BUSY = 22,                 /* Read to check if sync is done */
154     SVGA_REG_GUEST_ID = 23,             /* Set guest OS identifier */
155     SVGA_REG_CURSOR_ID = 24,            /* ID of cursor */
156     SVGA_REG_CURSOR_X = 25,             /* Set cursor X position */
157     SVGA_REG_CURSOR_Y = 26,             /* Set cursor Y position */
158     SVGA_REG_CURSOR_ON = 27,            /* Turn cursor on/off */
159     SVGA_REG_HOST_BITS_PER_PIXEL = 28,  /* Current bpp in the host */
160     SVGA_REG_SCRATCH_SIZE = 29,         /* Number of scratch registers */
161     SVGA_REG_MEM_REGS = 30,             /* Number of FIFO registers */
162     SVGA_REG_NUM_DISPLAYS = 31,         /* Number of guest displays */
163     SVGA_REG_PITCHLOCK = 32,            /* Fixed pitch for all modes */
164 
165     SVGA_PALETTE_BASE = 1024,           /* Base of SVGA color map */
166     SVGA_PALETTE_END  = SVGA_PALETTE_BASE + 767,
167     SVGA_SCRATCH_BASE = SVGA_PALETTE_BASE + 768,
168 };
169 
170 #define SVGA_CAP_NONE                   0
171 #define SVGA_CAP_RECT_FILL              (1 << 0)
172 #define SVGA_CAP_RECT_COPY              (1 << 1)
173 #define SVGA_CAP_RECT_PAT_FILL          (1 << 2)
174 #define SVGA_CAP_LEGACY_OFFSCREEN       (1 << 3)
175 #define SVGA_CAP_RASTER_OP              (1 << 4)
176 #define SVGA_CAP_CURSOR                 (1 << 5)
177 #define SVGA_CAP_CURSOR_BYPASS          (1 << 6)
178 #define SVGA_CAP_CURSOR_BYPASS_2        (1 << 7)
179 #define SVGA_CAP_8BIT_EMULATION         (1 << 8)
180 #define SVGA_CAP_ALPHA_CURSOR           (1 << 9)
181 #define SVGA_CAP_GLYPH                  (1 << 10)
182 #define SVGA_CAP_GLYPH_CLIPPING         (1 << 11)
183 #define SVGA_CAP_OFFSCREEN_1            (1 << 12)
184 #define SVGA_CAP_ALPHA_BLEND            (1 << 13)
185 #define SVGA_CAP_3D                     (1 << 14)
186 #define SVGA_CAP_EXTENDED_FIFO          (1 << 15)
187 #define SVGA_CAP_MULTIMON               (1 << 16)
188 #define SVGA_CAP_PITCHLOCK              (1 << 17)
189 
190 /*
191  * FIFO offsets (seen as an array of 32-bit words)
192  */
193 enum {
194     /*
195      * The original defined FIFO offsets
196      */
197     SVGA_FIFO_MIN = 0,
198     SVGA_FIFO_MAX,      /* The distance from MIN to MAX must be at least 10K */
199     SVGA_FIFO_NEXT,
200     SVGA_FIFO_STOP,
201 
202     /*
203      * Additional offsets added as of SVGA_CAP_EXTENDED_FIFO
204      */
205     SVGA_FIFO_CAPABILITIES = 4,
206     SVGA_FIFO_FLAGS,
207     SVGA_FIFO_FENCE,
208     SVGA_FIFO_3D_HWVERSION,
209     SVGA_FIFO_PITCHLOCK,
210 };
211 
212 #define SVGA_FIFO_CAP_NONE              0
213 #define SVGA_FIFO_CAP_FENCE             (1 << 0)
214 #define SVGA_FIFO_CAP_ACCELFRONT        (1 << 1)
215 #define SVGA_FIFO_CAP_PITCHLOCK         (1 << 2)
216 
217 #define SVGA_FIFO_FLAG_NONE             0
218 #define SVGA_FIFO_FLAG_ACCELFRONT       (1 << 0)
219 
220 /* These values can probably be changed arbitrarily.  */
221 #define SVGA_SCRATCH_SIZE               0x8000
222 #define SVGA_MAX_WIDTH                  2368
223 #define SVGA_MAX_HEIGHT                 1770
224 
225 #ifdef VERBOSE
226 # define GUEST_OS_BASE          0x5001
227 static const char *vmsvga_guest_id[] = {
228     [0x00] = "Dos",
229     [0x01] = "Windows 3.1",
230     [0x02] = "Windows 95",
231     [0x03] = "Windows 98",
232     [0x04] = "Windows ME",
233     [0x05] = "Windows NT",
234     [0x06] = "Windows 2000",
235     [0x07] = "Linux",
236     [0x08] = "OS/2",
237     [0x09] = "an unknown OS",
238     [0x0a] = "BSD",
239     [0x0b] = "Whistler",
240     [0x0c] = "an unknown OS",
241     [0x0d] = "an unknown OS",
242     [0x0e] = "an unknown OS",
243     [0x0f] = "an unknown OS",
244     [0x10] = "an unknown OS",
245     [0x11] = "an unknown OS",
246     [0x12] = "an unknown OS",
247     [0x13] = "an unknown OS",
248     [0x14] = "an unknown OS",
249     [0x15] = "Windows 2003",
250 };
251 #endif
252 
253 enum {
254     SVGA_CMD_INVALID_CMD = 0,
255     SVGA_CMD_UPDATE = 1,
256     SVGA_CMD_RECT_FILL = 2,
257     SVGA_CMD_RECT_COPY = 3,
258     SVGA_CMD_DEFINE_BITMAP = 4,
259     SVGA_CMD_DEFINE_BITMAP_SCANLINE = 5,
260     SVGA_CMD_DEFINE_PIXMAP = 6,
261     SVGA_CMD_DEFINE_PIXMAP_SCANLINE = 7,
262     SVGA_CMD_RECT_BITMAP_FILL = 8,
263     SVGA_CMD_RECT_PIXMAP_FILL = 9,
264     SVGA_CMD_RECT_BITMAP_COPY = 10,
265     SVGA_CMD_RECT_PIXMAP_COPY = 11,
266     SVGA_CMD_FREE_OBJECT = 12,
267     SVGA_CMD_RECT_ROP_FILL = 13,
268     SVGA_CMD_RECT_ROP_COPY = 14,
269     SVGA_CMD_RECT_ROP_BITMAP_FILL = 15,
270     SVGA_CMD_RECT_ROP_PIXMAP_FILL = 16,
271     SVGA_CMD_RECT_ROP_BITMAP_COPY = 17,
272     SVGA_CMD_RECT_ROP_PIXMAP_COPY = 18,
273     SVGA_CMD_DEFINE_CURSOR = 19,
274     SVGA_CMD_DISPLAY_CURSOR = 20,
275     SVGA_CMD_MOVE_CURSOR = 21,
276     SVGA_CMD_DEFINE_ALPHA_CURSOR = 22,
277     SVGA_CMD_DRAW_GLYPH = 23,
278     SVGA_CMD_DRAW_GLYPH_CLIPPED = 24,
279     SVGA_CMD_UPDATE_VERBOSE = 25,
280     SVGA_CMD_SURFACE_FILL = 26,
281     SVGA_CMD_SURFACE_COPY = 27,
282     SVGA_CMD_SURFACE_ALPHA_BLEND = 28,
283     SVGA_CMD_FRONT_ROP_FILL = 29,
284     SVGA_CMD_FENCE = 30,
285 };
286 
287 /* Legal values for the SVGA_REG_CURSOR_ON register in cursor bypass mode */
288 enum {
289     SVGA_CURSOR_ON_HIDE = 0,
290     SVGA_CURSOR_ON_SHOW = 1,
291     SVGA_CURSOR_ON_REMOVE_FROM_FB = 2,
292     SVGA_CURSOR_ON_RESTORE_TO_FB = 3,
293 };
294 
295 static inline bool vmsvga_verify_rect(DisplaySurface *surface,
296                                       const char *name,
297                                       int x, int y, int w, int h)
298 {
299     if (x < 0) {
300         trace_vmware_verify_rect_less_than_zero(name, "x", x);
301         return false;
302     }
303     if (x > SVGA_MAX_WIDTH) {
304         trace_vmware_verify_rect_greater_than_bound(name, "x", SVGA_MAX_WIDTH,
305                                                     x);
306         return false;
307     }
308     if (w < 0) {
309         trace_vmware_verify_rect_less_than_zero(name, "w", w);
310         return false;
311     }
312     if (w > SVGA_MAX_WIDTH) {
313         trace_vmware_verify_rect_greater_than_bound(name, "w", SVGA_MAX_WIDTH,
314                                                     w);
315         return false;
316     }
317     if (x + w > surface_width(surface)) {
318         trace_vmware_verify_rect_surface_bound_exceeded(name, "width",
319                                                         surface_width(surface),
320                                                         "x", x, "w", w);
321         return false;
322     }
323 
324     if (y < 0) {
325         trace_vmware_verify_rect_less_than_zero(name, "y", y);
326         return false;
327     }
328     if (y > SVGA_MAX_HEIGHT) {
329         trace_vmware_verify_rect_greater_than_bound(name, "y", SVGA_MAX_HEIGHT,
330                                                     y);
331         return false;
332     }
333     if (h < 0) {
334         trace_vmware_verify_rect_less_than_zero(name, "h", h);
335         return false;
336     }
337     if (h > SVGA_MAX_HEIGHT) {
338         trace_vmware_verify_rect_greater_than_bound(name, "y", SVGA_MAX_HEIGHT,
339                                                     y);
340         return false;
341     }
342     if (y + h > surface_height(surface)) {
343         trace_vmware_verify_rect_surface_bound_exceeded(name, "height",
344                                                         surface_height(surface),
345                                                         "y", y, "h", h);
346         return false;
347     }
348 
349     return true;
350 }
351 
352 static inline void vmsvga_update_rect(struct vmsvga_state_s *s,
353                                       int x, int y, int w, int h)
354 {
355     DisplaySurface *surface = qemu_console_surface(s->vga.con);
356     int line;
357     int bypl;
358     int width;
359     int start;
360     uint8_t *src;
361     uint8_t *dst;
362 
363     if (!vmsvga_verify_rect(surface, __func__, x, y, w, h)) {
364         /* go for a fullscreen update as fallback */
365         x = 0;
366         y = 0;
367         w = surface_width(surface);
368         h = surface_height(surface);
369     }
370 
371     bypl = surface_stride(surface);
372     width = surface_bytes_per_pixel(surface) * w;
373     start = surface_bytes_per_pixel(surface) * x + bypl * y;
374     src = s->vga.vram_ptr + start;
375     dst = surface_data(surface) + start;
376 
377     for (line = h; line > 0; line--, src += bypl, dst += bypl) {
378         memcpy(dst, src, width);
379     }
380     dpy_gfx_update(s->vga.con, x, y, w, h);
381 }
382 
383 static inline void vmsvga_update_rect_flush(struct vmsvga_state_s *s)
384 {
385     struct vmsvga_rect_s *rect;
386 
387     if (s->invalidated) {
388         s->redraw_fifo_last = 0;
389         return;
390     }
391     /* Overlapping region updates can be optimised out here - if someone
392      * knows a smart algorithm to do that, please share.  */
393     for (int i = 0; i < s->redraw_fifo_last; i++) {
394         rect = &s->redraw_fifo[i];
395         vmsvga_update_rect(s, rect->x, rect->y, rect->w, rect->h);
396     }
397 
398     s->redraw_fifo_last = 0;
399 }
400 
401 static inline void vmsvga_update_rect_delayed(struct vmsvga_state_s *s,
402                 int x, int y, int w, int h)
403 {
404 
405     if (s->redraw_fifo_last >= REDRAW_FIFO_LEN) {
406         trace_vmware_update_rect_delayed_flush();
407         vmsvga_update_rect_flush(s);
408     }
409 
410     struct vmsvga_rect_s *rect = &s->redraw_fifo[s->redraw_fifo_last++];
411 
412     rect->x = x;
413     rect->y = y;
414     rect->w = w;
415     rect->h = h;
416 }
417 
418 #ifdef HW_RECT_ACCEL
419 static inline int vmsvga_copy_rect(struct vmsvga_state_s *s,
420                 int x0, int y0, int x1, int y1, int w, int h)
421 {
422     DisplaySurface *surface = qemu_console_surface(s->vga.con);
423     uint8_t *vram = s->vga.vram_ptr;
424     int bypl = surface_stride(surface);
425     int bypp = surface_bytes_per_pixel(surface);
426     int width = bypp * w;
427     int line = h;
428     uint8_t *ptr[2];
429 
430     if (!vmsvga_verify_rect(surface, "vmsvga_copy_rect/src", x0, y0, w, h)) {
431         return -1;
432     }
433     if (!vmsvga_verify_rect(surface, "vmsvga_copy_rect/dst", x1, y1, w, h)) {
434         return -1;
435     }
436 
437     if (y1 > y0) {
438         ptr[0] = vram + bypp * x0 + bypl * (y0 + h - 1);
439         ptr[1] = vram + bypp * x1 + bypl * (y1 + h - 1);
440         for (; line > 0; line --, ptr[0] -= bypl, ptr[1] -= bypl) {
441             memmove(ptr[1], ptr[0], width);
442         }
443     } else {
444         ptr[0] = vram + bypp * x0 + bypl * y0;
445         ptr[1] = vram + bypp * x1 + bypl * y1;
446         for (; line > 0; line --, ptr[0] += bypl, ptr[1] += bypl) {
447             memmove(ptr[1], ptr[0], width);
448         }
449     }
450 
451     vmsvga_update_rect_delayed(s, x1, y1, w, h);
452     return 0;
453 }
454 #endif
455 
456 #ifdef HW_FILL_ACCEL
457 static inline int vmsvga_fill_rect(struct vmsvga_state_s *s,
458                 uint32_t c, int x, int y, int w, int h)
459 {
460     DisplaySurface *surface = qemu_console_surface(s->vga.con);
461     int bypl = surface_stride(surface);
462     int width = surface_bytes_per_pixel(surface) * w;
463     int line = h;
464     int column;
465     uint8_t *fst;
466     uint8_t *dst;
467     uint8_t *src;
468     uint8_t col[4];
469 
470     if (!vmsvga_verify_rect(surface, __func__, x, y, w, h)) {
471         return -1;
472     }
473 
474     col[0] = c;
475     col[1] = c >> 8;
476     col[2] = c >> 16;
477     col[3] = c >> 24;
478 
479     fst = s->vga.vram_ptr + surface_bytes_per_pixel(surface) * x + bypl * y;
480 
481     if (line--) {
482         dst = fst;
483         src = col;
484         for (column = width; column > 0; column--) {
485             *(dst++) = *(src++);
486             if (src - col == surface_bytes_per_pixel(surface)) {
487                 src = col;
488             }
489         }
490         dst = fst;
491         for (; line > 0; line--) {
492             dst += bypl;
493             memcpy(dst, fst, width);
494         }
495     }
496 
497     vmsvga_update_rect_delayed(s, x, y, w, h);
498     return 0;
499 }
500 #endif
501 
502 struct vmsvga_cursor_definition_s {
503     uint32_t width;
504     uint32_t height;
505     int id;
506     uint32_t bpp;
507     int hot_x;
508     int hot_y;
509     uint32_t mask[1024];
510     uint32_t image[4096];
511 };
512 
513 #define SVGA_BITMAP_SIZE(w, h)          ((((w) + 31) >> 5) * (h))
514 #define SVGA_PIXMAP_SIZE(w, h, bpp)     (((((w) * (bpp)) + 31) >> 5) * (h))
515 
516 #ifdef HW_MOUSE_ACCEL
517 static inline void vmsvga_cursor_define(struct vmsvga_state_s *s,
518                 struct vmsvga_cursor_definition_s *c)
519 {
520     QEMUCursor *qc;
521     int i, pixels;
522 
523     qc = cursor_alloc(c->width, c->height);
524     assert(qc != NULL);
525 
526     qc->hot_x = c->hot_x;
527     qc->hot_y = c->hot_y;
528     switch (c->bpp) {
529     case 1:
530         cursor_set_mono(qc, 0xffffff, 0x000000, (void *)c->image,
531                         1, (void *)c->mask);
532 #ifdef DEBUG
533         cursor_print_ascii_art(qc, "vmware/mono");
534 #endif
535         break;
536     case 32:
537         /* fill alpha channel from mask, set color to zero */
538         cursor_set_mono(qc, 0x000000, 0x000000, (void *)c->mask,
539                         1, (void *)c->mask);
540         /* add in rgb values */
541         pixels = c->width * c->height;
542         for (i = 0; i < pixels; i++) {
543             qc->data[i] |= c->image[i] & 0xffffff;
544         }
545 #ifdef DEBUG
546         cursor_print_ascii_art(qc, "vmware/32bit");
547 #endif
548         break;
549     default:
550         fprintf(stderr, "%s: unhandled bpp %d, using fallback cursor\n",
551                 __func__, c->bpp);
552         cursor_put(qc);
553         qc = cursor_builtin_left_ptr();
554     }
555 
556     dpy_cursor_define(s->vga.con, qc);
557     cursor_put(qc);
558 }
559 #endif
560 
561 static inline int vmsvga_fifo_length(struct vmsvga_state_s *s)
562 {
563     int num;
564 
565     if (!s->config || !s->enable) {
566         return 0;
567     }
568 
569     s->fifo_min  = le32_to_cpu(s->fifo[SVGA_FIFO_MIN]);
570     s->fifo_max  = le32_to_cpu(s->fifo[SVGA_FIFO_MAX]);
571     s->fifo_next = le32_to_cpu(s->fifo[SVGA_FIFO_NEXT]);
572     s->fifo_stop = le32_to_cpu(s->fifo[SVGA_FIFO_STOP]);
573 
574     /* Check range and alignment.  */
575     if ((s->fifo_min | s->fifo_max | s->fifo_next | s->fifo_stop) & 3) {
576         return 0;
577     }
578     if (s->fifo_min < sizeof(uint32_t) * 4) {
579         return 0;
580     }
581     if (s->fifo_max > SVGA_FIFO_SIZE ||
582         s->fifo_min >= SVGA_FIFO_SIZE ||
583         s->fifo_stop >= SVGA_FIFO_SIZE ||
584         s->fifo_next >= SVGA_FIFO_SIZE) {
585         return 0;
586     }
587     if (s->fifo_max < s->fifo_min + 10 * KiB) {
588         return 0;
589     }
590 
591     num = s->fifo_next - s->fifo_stop;
592     if (num < 0) {
593         num += s->fifo_max - s->fifo_min;
594     }
595     return num >> 2;
596 }
597 
598 static inline uint32_t vmsvga_fifo_read_raw(struct vmsvga_state_s *s)
599 {
600     uint32_t cmd = s->fifo[s->fifo_stop >> 2];
601 
602     s->fifo_stop += 4;
603     if (s->fifo_stop >= s->fifo_max) {
604         s->fifo_stop = s->fifo_min;
605     }
606     s->fifo[SVGA_FIFO_STOP] = cpu_to_le32(s->fifo_stop);
607     return cmd;
608 }
609 
610 static inline uint32_t vmsvga_fifo_read(struct vmsvga_state_s *s)
611 {
612     return le32_to_cpu(vmsvga_fifo_read_raw(s));
613 }
614 
615 static void vmsvga_fifo_run(struct vmsvga_state_s *s)
616 {
617     uint32_t cmd, colour;
618     int args, len, maxloop = 1024;
619     int x, y, dx, dy, width, height;
620     struct vmsvga_cursor_definition_s cursor;
621     uint32_t cmd_start;
622 
623     len = vmsvga_fifo_length(s);
624     while (len > 0 && --maxloop > 0) {
625         /* May need to go back to the start of the command if incomplete */
626         cmd_start = s->fifo_stop;
627 
628         switch (cmd = vmsvga_fifo_read(s)) {
629         case SVGA_CMD_UPDATE:
630         case SVGA_CMD_UPDATE_VERBOSE:
631             len -= 5;
632             if (len < 0) {
633                 goto rewind;
634             }
635 
636             x = vmsvga_fifo_read(s);
637             y = vmsvga_fifo_read(s);
638             width = vmsvga_fifo_read(s);
639             height = vmsvga_fifo_read(s);
640             vmsvga_update_rect_delayed(s, x, y, width, height);
641             break;
642 
643         case SVGA_CMD_RECT_FILL:
644             len -= 6;
645             if (len < 0) {
646                 goto rewind;
647             }
648 
649             colour = vmsvga_fifo_read(s);
650             x = vmsvga_fifo_read(s);
651             y = vmsvga_fifo_read(s);
652             width = vmsvga_fifo_read(s);
653             height = vmsvga_fifo_read(s);
654 #ifdef HW_FILL_ACCEL
655             if (vmsvga_fill_rect(s, colour, x, y, width, height) == 0) {
656                 break;
657             }
658 #endif
659             args = 0;
660             goto badcmd;
661 
662         case SVGA_CMD_RECT_COPY:
663             len -= 7;
664             if (len < 0) {
665                 goto rewind;
666             }
667 
668             x = vmsvga_fifo_read(s);
669             y = vmsvga_fifo_read(s);
670             dx = vmsvga_fifo_read(s);
671             dy = vmsvga_fifo_read(s);
672             width = vmsvga_fifo_read(s);
673             height = vmsvga_fifo_read(s);
674 #ifdef HW_RECT_ACCEL
675             if (vmsvga_copy_rect(s, x, y, dx, dy, width, height) == 0) {
676                 break;
677             }
678 #endif
679             args = 0;
680             goto badcmd;
681 
682         case SVGA_CMD_DEFINE_CURSOR:
683             len -= 8;
684             if (len < 0) {
685                 goto rewind;
686             }
687 
688             cursor.id = vmsvga_fifo_read(s);
689             cursor.hot_x = vmsvga_fifo_read(s);
690             cursor.hot_y = vmsvga_fifo_read(s);
691             cursor.width = x = vmsvga_fifo_read(s);
692             cursor.height = y = vmsvga_fifo_read(s);
693             vmsvga_fifo_read(s);
694             cursor.bpp = vmsvga_fifo_read(s);
695 
696             args = SVGA_BITMAP_SIZE(x, y) + SVGA_PIXMAP_SIZE(x, y, cursor.bpp);
697             if (cursor.width > 256
698                 || cursor.height > 256
699                 || cursor.bpp > 32
700                 || SVGA_BITMAP_SIZE(x, y) > ARRAY_SIZE(cursor.mask)
701                 || SVGA_PIXMAP_SIZE(x, y, cursor.bpp)
702                     > ARRAY_SIZE(cursor.image)) {
703                     goto badcmd;
704             }
705 
706             len -= args;
707             if (len < 0) {
708                 goto rewind;
709             }
710 
711             for (args = 0; args < SVGA_BITMAP_SIZE(x, y); args++) {
712                 cursor.mask[args] = vmsvga_fifo_read_raw(s);
713             }
714             for (args = 0; args < SVGA_PIXMAP_SIZE(x, y, cursor.bpp); args++) {
715                 cursor.image[args] = vmsvga_fifo_read_raw(s);
716             }
717 #ifdef HW_MOUSE_ACCEL
718             vmsvga_cursor_define(s, &cursor);
719             break;
720 #else
721             args = 0;
722             goto badcmd;
723 #endif
724 
725         /*
726          * Other commands that we at least know the number of arguments
727          * for so we can avoid FIFO desync if driver uses them illegally.
728          */
729         case SVGA_CMD_DEFINE_ALPHA_CURSOR:
730             len -= 6;
731             if (len < 0) {
732                 goto rewind;
733             }
734             vmsvga_fifo_read(s);
735             vmsvga_fifo_read(s);
736             vmsvga_fifo_read(s);
737             x = vmsvga_fifo_read(s);
738             y = vmsvga_fifo_read(s);
739             args = x * y;
740             goto badcmd;
741         case SVGA_CMD_RECT_ROP_FILL:
742             args = 6;
743             goto badcmd;
744         case SVGA_CMD_RECT_ROP_COPY:
745             args = 7;
746             goto badcmd;
747         case SVGA_CMD_DRAW_GLYPH_CLIPPED:
748             len -= 4;
749             if (len < 0) {
750                 goto rewind;
751             }
752             vmsvga_fifo_read(s);
753             vmsvga_fifo_read(s);
754             args = 7 + (vmsvga_fifo_read(s) >> 2);
755             goto badcmd;
756         case SVGA_CMD_SURFACE_ALPHA_BLEND:
757             args = 12;
758             goto badcmd;
759 
760         /*
761          * Other commands that are not listed as depending on any
762          * CAPABILITIES bits, but are not described in the README either.
763          */
764         case SVGA_CMD_SURFACE_FILL:
765         case SVGA_CMD_SURFACE_COPY:
766         case SVGA_CMD_FRONT_ROP_FILL:
767         case SVGA_CMD_FENCE:
768         case SVGA_CMD_INVALID_CMD:
769             break; /* Nop */
770 
771         default:
772             args = 0;
773         badcmd:
774             len -= args;
775             if (len < 0) {
776                 goto rewind;
777             }
778             while (args--) {
779                 vmsvga_fifo_read(s);
780             }
781             printf("%s: Unknown command 0x%02x in SVGA command FIFO\n",
782                    __func__, cmd);
783             break;
784 
785         rewind:
786             s->fifo_stop = cmd_start;
787             s->fifo[SVGA_FIFO_STOP] = cpu_to_le32(s->fifo_stop);
788             break;
789         }
790     }
791 
792     s->syncing = 0;
793 }
794 
795 static uint32_t vmsvga_index_read(void *opaque, uint32_t address)
796 {
797     struct vmsvga_state_s *s = opaque;
798 
799     return s->index;
800 }
801 
802 static void vmsvga_index_write(void *opaque, uint32_t address, uint32_t index)
803 {
804     struct vmsvga_state_s *s = opaque;
805 
806     s->index = index;
807 }
808 
809 static uint32_t vmsvga_value_read(void *opaque, uint32_t address)
810 {
811     uint32_t caps;
812     struct vmsvga_state_s *s = opaque;
813     DisplaySurface *surface = qemu_console_surface(s->vga.con);
814     PixelFormat pf;
815     uint32_t ret;
816 
817     switch (s->index) {
818     case SVGA_REG_ID:
819         ret = s->svgaid;
820         break;
821 
822     case SVGA_REG_ENABLE:
823         ret = s->enable;
824         break;
825 
826     case SVGA_REG_WIDTH:
827         ret = s->new_width ? s->new_width : surface_width(surface);
828         break;
829 
830     case SVGA_REG_HEIGHT:
831         ret = s->new_height ? s->new_height : surface_height(surface);
832         break;
833 
834     case SVGA_REG_MAX_WIDTH:
835         ret = SVGA_MAX_WIDTH;
836         break;
837 
838     case SVGA_REG_MAX_HEIGHT:
839         ret = SVGA_MAX_HEIGHT;
840         break;
841 
842     case SVGA_REG_DEPTH:
843         ret = (s->new_depth == 32) ? 24 : s->new_depth;
844         break;
845 
846     case SVGA_REG_BITS_PER_PIXEL:
847     case SVGA_REG_HOST_BITS_PER_PIXEL:
848         ret = s->new_depth;
849         break;
850 
851     case SVGA_REG_PSEUDOCOLOR:
852         ret = 0x0;
853         break;
854 
855     case SVGA_REG_RED_MASK:
856         pf = qemu_default_pixelformat(s->new_depth);
857         ret = pf.rmask;
858         break;
859 
860     case SVGA_REG_GREEN_MASK:
861         pf = qemu_default_pixelformat(s->new_depth);
862         ret = pf.gmask;
863         break;
864 
865     case SVGA_REG_BLUE_MASK:
866         pf = qemu_default_pixelformat(s->new_depth);
867         ret = pf.bmask;
868         break;
869 
870     case SVGA_REG_BYTES_PER_LINE:
871         if (s->new_width) {
872             ret = (s->new_depth * s->new_width) / 8;
873         } else {
874             ret = surface_stride(surface);
875         }
876         break;
877 
878     case SVGA_REG_FB_START: {
879         struct pci_vmsvga_state_s *pci_vmsvga
880             = container_of(s, struct pci_vmsvga_state_s, chip);
881         ret = pci_get_bar_addr(PCI_DEVICE(pci_vmsvga), 1);
882         break;
883     }
884 
885     case SVGA_REG_FB_OFFSET:
886         ret = 0x0;
887         break;
888 
889     case SVGA_REG_VRAM_SIZE:
890         ret = s->vga.vram_size; /* No physical VRAM besides the framebuffer */
891         break;
892 
893     case SVGA_REG_FB_SIZE:
894         ret = s->vga.vram_size;
895         break;
896 
897     case SVGA_REG_CAPABILITIES:
898         caps = SVGA_CAP_NONE;
899 #ifdef HW_RECT_ACCEL
900         caps |= SVGA_CAP_RECT_COPY;
901 #endif
902 #ifdef HW_FILL_ACCEL
903         caps |= SVGA_CAP_RECT_FILL;
904 #endif
905 #ifdef HW_MOUSE_ACCEL
906         if (dpy_cursor_define_supported(s->vga.con)) {
907             caps |= SVGA_CAP_CURSOR | SVGA_CAP_CURSOR_BYPASS_2 |
908                     SVGA_CAP_CURSOR_BYPASS;
909         }
910 #endif
911         ret = caps;
912         break;
913 
914     case SVGA_REG_MEM_START: {
915         struct pci_vmsvga_state_s *pci_vmsvga
916             = container_of(s, struct pci_vmsvga_state_s, chip);
917         ret = pci_get_bar_addr(PCI_DEVICE(pci_vmsvga), 2);
918         break;
919     }
920 
921     case SVGA_REG_MEM_SIZE:
922         ret = s->fifo_size;
923         break;
924 
925     case SVGA_REG_CONFIG_DONE:
926         ret = s->config;
927         break;
928 
929     case SVGA_REG_SYNC:
930     case SVGA_REG_BUSY:
931         ret = s->syncing;
932         break;
933 
934     case SVGA_REG_GUEST_ID:
935         ret = s->guest;
936         break;
937 
938     case SVGA_REG_CURSOR_ID:
939         ret = s->cursor.id;
940         break;
941 
942     case SVGA_REG_CURSOR_X:
943         ret = s->cursor.x;
944         break;
945 
946     case SVGA_REG_CURSOR_Y:
947         ret = s->cursor.y;
948         break;
949 
950     case SVGA_REG_CURSOR_ON:
951         ret = s->cursor.on;
952         break;
953 
954     case SVGA_REG_SCRATCH_SIZE:
955         ret = s->scratch_size;
956         break;
957 
958     case SVGA_REG_MEM_REGS:
959     case SVGA_REG_NUM_DISPLAYS:
960     case SVGA_REG_PITCHLOCK:
961     case SVGA_PALETTE_BASE ... SVGA_PALETTE_END:
962         ret = 0;
963         break;
964 
965     default:
966         if (s->index >= SVGA_SCRATCH_BASE &&
967             s->index < SVGA_SCRATCH_BASE + s->scratch_size) {
968             ret = s->scratch[s->index - SVGA_SCRATCH_BASE];
969             break;
970         }
971         qemu_log_mask(LOG_GUEST_ERROR,
972                       "%s: Bad register %02x\n", __func__, s->index);
973         ret = 0;
974         break;
975     }
976 
977     if (s->index >= SVGA_SCRATCH_BASE) {
978         trace_vmware_scratch_read(s->index, ret);
979     } else if (s->index >= SVGA_PALETTE_BASE) {
980         trace_vmware_palette_read(s->index, ret);
981     } else {
982         trace_vmware_value_read(s->index, ret);
983     }
984     return ret;
985 }
986 
987 static void vmsvga_value_write(void *opaque, uint32_t address, uint32_t value)
988 {
989     struct vmsvga_state_s *s = opaque;
990 
991     if (s->index >= SVGA_SCRATCH_BASE) {
992         trace_vmware_scratch_write(s->index, value);
993     } else if (s->index >= SVGA_PALETTE_BASE) {
994         trace_vmware_palette_write(s->index, value);
995     } else {
996         trace_vmware_value_write(s->index, value);
997     }
998     switch (s->index) {
999     case SVGA_REG_ID:
1000         if (value == SVGA_ID_2 || value == SVGA_ID_1 || value == SVGA_ID_0) {
1001             s->svgaid = value;
1002         }
1003         break;
1004 
1005     case SVGA_REG_ENABLE:
1006         s->enable = !!value;
1007         s->invalidated = 1;
1008         s->vga.hw_ops->invalidate(&s->vga);
1009         if (s->enable && s->config) {
1010             vga_dirty_log_stop(&s->vga);
1011         } else {
1012             vga_dirty_log_start(&s->vga);
1013         }
1014         break;
1015 
1016     case SVGA_REG_WIDTH:
1017         if (value <= SVGA_MAX_WIDTH) {
1018             s->new_width = value;
1019             s->invalidated = 1;
1020         } else {
1021             qemu_log_mask(LOG_GUEST_ERROR,
1022                           "%s: Bad width: %i\n", __func__, value);
1023         }
1024         break;
1025 
1026     case SVGA_REG_HEIGHT:
1027         if (value <= SVGA_MAX_HEIGHT) {
1028             s->new_height = value;
1029             s->invalidated = 1;
1030         } else {
1031             qemu_log_mask(LOG_GUEST_ERROR,
1032                           "%s: Bad height: %i\n", __func__, value);
1033         }
1034         break;
1035 
1036     case SVGA_REG_BITS_PER_PIXEL:
1037         if (value != 32) {
1038             qemu_log_mask(LOG_GUEST_ERROR,
1039                           "%s: Bad bits per pixel: %i bits\n", __func__, value);
1040             s->config = 0;
1041             s->invalidated = 1;
1042         }
1043         break;
1044 
1045     case SVGA_REG_CONFIG_DONE:
1046         if (value) {
1047             s->fifo = (uint32_t *) s->fifo_ptr;
1048             vga_dirty_log_stop(&s->vga);
1049         }
1050         s->config = !!value;
1051         break;
1052 
1053     case SVGA_REG_SYNC:
1054         s->syncing = 1;
1055         vmsvga_fifo_run(s); /* Or should we just wait for update_display? */
1056         break;
1057 
1058     case SVGA_REG_GUEST_ID:
1059         s->guest = value;
1060 #ifdef VERBOSE
1061         if (value >= GUEST_OS_BASE && value < GUEST_OS_BASE +
1062             ARRAY_SIZE(vmsvga_guest_id)) {
1063             printf("%s: guest runs %s.\n", __func__,
1064                    vmsvga_guest_id[value - GUEST_OS_BASE]);
1065         }
1066 #endif
1067         break;
1068 
1069     case SVGA_REG_CURSOR_ID:
1070         s->cursor.id = value;
1071         break;
1072 
1073     case SVGA_REG_CURSOR_X:
1074         s->cursor.x = value;
1075         break;
1076 
1077     case SVGA_REG_CURSOR_Y:
1078         s->cursor.y = value;
1079         break;
1080 
1081     case SVGA_REG_CURSOR_ON:
1082         s->cursor.on |= (value == SVGA_CURSOR_ON_SHOW);
1083         s->cursor.on &= (value != SVGA_CURSOR_ON_HIDE);
1084 #ifdef HW_MOUSE_ACCEL
1085         if (value <= SVGA_CURSOR_ON_SHOW) {
1086             dpy_mouse_set(s->vga.con, s->cursor.x, s->cursor.y, s->cursor.on);
1087         }
1088 #endif
1089         break;
1090 
1091     case SVGA_REG_DEPTH:
1092     case SVGA_REG_MEM_REGS:
1093     case SVGA_REG_NUM_DISPLAYS:
1094     case SVGA_REG_PITCHLOCK:
1095     case SVGA_PALETTE_BASE ... SVGA_PALETTE_END:
1096         break;
1097 
1098     default:
1099         if (s->index >= SVGA_SCRATCH_BASE &&
1100                 s->index < SVGA_SCRATCH_BASE + s->scratch_size) {
1101             s->scratch[s->index - SVGA_SCRATCH_BASE] = value;
1102             break;
1103         }
1104         qemu_log_mask(LOG_GUEST_ERROR,
1105                       "%s: Bad register %02x\n", __func__, s->index);
1106     }
1107 }
1108 
1109 static uint32_t vmsvga_bios_read(void *opaque, uint32_t address)
1110 {
1111     printf("%s: what are we supposed to return?\n", __func__);
1112     return 0xcafe;
1113 }
1114 
1115 static void vmsvga_bios_write(void *opaque, uint32_t address, uint32_t data)
1116 {
1117     printf("%s: what are we supposed to do with (%08x)?\n", __func__, data);
1118 }
1119 
1120 static inline void vmsvga_check_size(struct vmsvga_state_s *s)
1121 {
1122     DisplaySurface *surface = qemu_console_surface(s->vga.con);
1123 
1124     if (s->new_width != surface_width(surface) ||
1125         s->new_height != surface_height(surface) ||
1126         s->new_depth != surface_bits_per_pixel(surface)) {
1127         int stride = (s->new_depth * s->new_width) / 8;
1128         pixman_format_code_t format =
1129             qemu_default_pixman_format(s->new_depth, true);
1130         trace_vmware_setmode(s->new_width, s->new_height, s->new_depth);
1131         surface = qemu_create_displaysurface_from(s->new_width, s->new_height,
1132                                                   format, stride,
1133                                                   s->vga.vram_ptr);
1134         dpy_gfx_replace_surface(s->vga.con, surface);
1135         s->invalidated = 1;
1136     }
1137 }
1138 
1139 static void vmsvga_update_display(void *opaque)
1140 {
1141     struct vmsvga_state_s *s = opaque;
1142 
1143     if (!s->enable || !s->config) {
1144         /* in standard vga mode */
1145         s->vga.hw_ops->gfx_update(&s->vga);
1146         return;
1147     }
1148 
1149     vmsvga_check_size(s);
1150 
1151     vmsvga_fifo_run(s);
1152     vmsvga_update_rect_flush(s);
1153 
1154     if (s->invalidated) {
1155         s->invalidated = 0;
1156         dpy_gfx_update_full(s->vga.con);
1157     }
1158 }
1159 
1160 static void vmsvga_reset(DeviceState *dev)
1161 {
1162     struct pci_vmsvga_state_s *pci = VMWARE_SVGA(dev);
1163     struct vmsvga_state_s *s = &pci->chip;
1164 
1165     s->index = 0;
1166     s->enable = 0;
1167     s->config = 0;
1168     s->svgaid = SVGA_ID;
1169     s->cursor.on = 0;
1170     s->redraw_fifo_last = 0;
1171     s->syncing = 0;
1172 
1173     vga_dirty_log_start(&s->vga);
1174 }
1175 
1176 static void vmsvga_invalidate_display(void *opaque)
1177 {
1178     struct vmsvga_state_s *s = opaque;
1179     if (!s->enable) {
1180         s->vga.hw_ops->invalidate(&s->vga);
1181         return;
1182     }
1183 
1184     s->invalidated = 1;
1185 }
1186 
1187 static void vmsvga_text_update(void *opaque, console_ch_t *chardata)
1188 {
1189     struct vmsvga_state_s *s = opaque;
1190 
1191     if (s->vga.hw_ops->text_update) {
1192         s->vga.hw_ops->text_update(&s->vga, chardata);
1193     }
1194 }
1195 
1196 static int vmsvga_post_load(void *opaque, int version_id)
1197 {
1198     struct vmsvga_state_s *s = opaque;
1199 
1200     s->invalidated = 1;
1201     if (s->config) {
1202         s->fifo = (uint32_t *) s->fifo_ptr;
1203     }
1204     return 0;
1205 }
1206 
1207 static const VMStateDescription vmstate_vmware_vga_internal = {
1208     .name = "vmware_vga_internal",
1209     .version_id = 0,
1210     .minimum_version_id = 0,
1211     .post_load = vmsvga_post_load,
1212     .fields = (VMStateField[]) {
1213         VMSTATE_INT32_EQUAL(new_depth, struct vmsvga_state_s, NULL),
1214         VMSTATE_INT32(enable, struct vmsvga_state_s),
1215         VMSTATE_INT32(config, struct vmsvga_state_s),
1216         VMSTATE_INT32(cursor.id, struct vmsvga_state_s),
1217         VMSTATE_INT32(cursor.x, struct vmsvga_state_s),
1218         VMSTATE_INT32(cursor.y, struct vmsvga_state_s),
1219         VMSTATE_INT32(cursor.on, struct vmsvga_state_s),
1220         VMSTATE_INT32(index, struct vmsvga_state_s),
1221         VMSTATE_VARRAY_INT32(scratch, struct vmsvga_state_s,
1222                              scratch_size, 0, vmstate_info_uint32, uint32_t),
1223         VMSTATE_INT32(new_width, struct vmsvga_state_s),
1224         VMSTATE_INT32(new_height, struct vmsvga_state_s),
1225         VMSTATE_UINT32(guest, struct vmsvga_state_s),
1226         VMSTATE_UINT32(svgaid, struct vmsvga_state_s),
1227         VMSTATE_INT32(syncing, struct vmsvga_state_s),
1228         VMSTATE_UNUSED(4), /* was fb_size */
1229         VMSTATE_END_OF_LIST()
1230     }
1231 };
1232 
1233 static const VMStateDescription vmstate_vmware_vga = {
1234     .name = "vmware_vga",
1235     .version_id = 0,
1236     .minimum_version_id = 0,
1237     .fields = (VMStateField[]) {
1238         VMSTATE_PCI_DEVICE(parent_obj, struct pci_vmsvga_state_s),
1239         VMSTATE_STRUCT(chip, struct pci_vmsvga_state_s, 0,
1240                        vmstate_vmware_vga_internal, struct vmsvga_state_s),
1241         VMSTATE_END_OF_LIST()
1242     }
1243 };
1244 
1245 static const GraphicHwOps vmsvga_ops = {
1246     .invalidate  = vmsvga_invalidate_display,
1247     .gfx_update  = vmsvga_update_display,
1248     .text_update = vmsvga_text_update,
1249 };
1250 
1251 static void vmsvga_init(DeviceState *dev, struct vmsvga_state_s *s,
1252                         MemoryRegion *address_space, MemoryRegion *io)
1253 {
1254     s->scratch_size = SVGA_SCRATCH_SIZE;
1255     s->scratch = g_malloc(s->scratch_size * 4);
1256 
1257     s->vga.con = graphic_console_init(dev, 0, &vmsvga_ops, s);
1258 
1259     s->fifo_size = SVGA_FIFO_SIZE;
1260     memory_region_init_ram(&s->fifo_ram, NULL, "vmsvga.fifo", s->fifo_size,
1261                            &error_fatal);
1262     s->fifo_ptr = memory_region_get_ram_ptr(&s->fifo_ram);
1263 
1264     vga_common_init(&s->vga, OBJECT(dev), &error_fatal);
1265     vga_init(&s->vga, OBJECT(dev), address_space, io, true);
1266     vmstate_register(NULL, 0, &vmstate_vga_common, &s->vga);
1267     s->new_depth = 32;
1268 }
1269 
1270 static uint64_t vmsvga_io_read(void *opaque, hwaddr addr, unsigned size)
1271 {
1272     struct vmsvga_state_s *s = opaque;
1273 
1274     switch (addr) {
1275     case SVGA_IO_MUL * SVGA_INDEX_PORT: return vmsvga_index_read(s, addr);
1276     case SVGA_IO_MUL * SVGA_VALUE_PORT: return vmsvga_value_read(s, addr);
1277     case SVGA_IO_MUL * SVGA_BIOS_PORT: return vmsvga_bios_read(s, addr);
1278     default: return -1u;
1279     }
1280 }
1281 
1282 static void vmsvga_io_write(void *opaque, hwaddr addr,
1283                             uint64_t data, unsigned size)
1284 {
1285     struct vmsvga_state_s *s = opaque;
1286 
1287     switch (addr) {
1288     case SVGA_IO_MUL * SVGA_INDEX_PORT:
1289         vmsvga_index_write(s, addr, data);
1290         break;
1291     case SVGA_IO_MUL * SVGA_VALUE_PORT:
1292         vmsvga_value_write(s, addr, data);
1293         break;
1294     case SVGA_IO_MUL * SVGA_BIOS_PORT:
1295         vmsvga_bios_write(s, addr, data);
1296         break;
1297     }
1298 }
1299 
1300 static const MemoryRegionOps vmsvga_io_ops = {
1301     .read = vmsvga_io_read,
1302     .write = vmsvga_io_write,
1303     .endianness = DEVICE_LITTLE_ENDIAN,
1304     .valid = {
1305         .min_access_size = 4,
1306         .max_access_size = 4,
1307         .unaligned = true,
1308     },
1309     .impl = {
1310         .unaligned = true,
1311     },
1312 };
1313 
1314 static void pci_vmsvga_realize(PCIDevice *dev, Error **errp)
1315 {
1316     struct pci_vmsvga_state_s *s = VMWARE_SVGA(dev);
1317 
1318     dev->config[PCI_CACHE_LINE_SIZE] = 0x08;
1319     dev->config[PCI_LATENCY_TIMER] = 0x40;
1320     dev->config[PCI_INTERRUPT_LINE] = 0xff;          /* End */
1321 
1322     memory_region_init_io(&s->io_bar, OBJECT(dev), &vmsvga_io_ops, &s->chip,
1323                           "vmsvga-io", 0x10);
1324     memory_region_set_flush_coalesced(&s->io_bar);
1325     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
1326 
1327     vmsvga_init(DEVICE(dev), &s->chip,
1328                 pci_address_space(dev), pci_address_space_io(dev));
1329 
1330     pci_register_bar(dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
1331                      &s->chip.vga.vram);
1332     pci_register_bar(dev, 2, PCI_BASE_ADDRESS_MEM_PREFETCH,
1333                      &s->chip.fifo_ram);
1334 }
1335 
1336 static Property vga_vmware_properties[] = {
1337     DEFINE_PROP_UINT32("vgamem_mb", struct pci_vmsvga_state_s,
1338                        chip.vga.vram_size_mb, 16),
1339     DEFINE_PROP_BOOL("global-vmstate", struct pci_vmsvga_state_s,
1340                      chip.vga.global_vmstate, false),
1341     DEFINE_PROP_END_OF_LIST(),
1342 };
1343 
1344 static void vmsvga_class_init(ObjectClass *klass, void *data)
1345 {
1346     DeviceClass *dc = DEVICE_CLASS(klass);
1347     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1348 
1349     k->realize = pci_vmsvga_realize;
1350     k->romfile = "vgabios-vmware.bin";
1351     k->vendor_id = PCI_VENDOR_ID_VMWARE;
1352     k->device_id = SVGA_PCI_DEVICE_ID;
1353     k->class_id = PCI_CLASS_DISPLAY_VGA;
1354     k->subsystem_vendor_id = PCI_VENDOR_ID_VMWARE;
1355     k->subsystem_id = SVGA_PCI_DEVICE_ID;
1356     dc->reset = vmsvga_reset;
1357     dc->vmsd = &vmstate_vmware_vga;
1358     device_class_set_props(dc, vga_vmware_properties);
1359     dc->hotpluggable = false;
1360     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
1361 }
1362 
1363 static const TypeInfo vmsvga_info = {
1364     .name          = TYPE_VMWARE_SVGA,
1365     .parent        = TYPE_PCI_DEVICE,
1366     .instance_size = sizeof(struct pci_vmsvga_state_s),
1367     .class_init    = vmsvga_class_init,
1368     .interfaces = (InterfaceInfo[]) {
1369         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1370         { },
1371     },
1372 };
1373 
1374 static void vmsvga_register_types(void)
1375 {
1376     type_register_static(&vmsvga_info);
1377 }
1378 
1379 type_init(vmsvga_register_types)
1380