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1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2015 Nahanni Systems, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28
29 #include <sys/types.h>
30 #include <sys/mman.h>
31
32 #include <machine/vmm.h>
33 #include <machine/vmm_snapshot.h>
34 #include <vmmapi.h>
35
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39
40 #include <errno.h>
41 #include <unistd.h>
42
43 #include "bhyvegc.h"
44 #include "bhyverun.h"
45 #include "config.h"
46 #include "debug.h"
47 #include "console.h"
48 #include "pci_emul.h"
49 #include "rfb.h"
50 #ifdef __amd64__
51 #include "amd64/vga.h"
52 #endif
53
54 /*
55  * bhyve Framebuffer device emulation.
56  * BAR0 points to the current mode information.
57  * BAR1 is the 32-bit framebuffer address.
58  *
59  *  -s <b>,fbuf,wait,vga=on|io|off,rfb=<ip>:port,w=width,h=height
60  */
61
62 static int fbuf_debug = 1;
63 #define DEBUG_INFO      1
64 #define DEBUG_VERBOSE   4
65 #define DPRINTF(level, params)  if (level <= fbuf_debug) PRINTLN params
66
67
68 #define KB      (1024UL)
69 #define MB      (1024 * 1024UL)
70
71 #define DMEMSZ  128
72
73 #define FB_SIZE         (32*MB)
74
75 #define COLS_MAX        3840
76 #define ROWS_MAX        2160
77
78 #define COLS_DEFAULT    1024
79 #define ROWS_DEFAULT    768
80
81 #define COLS_MIN        640
82 #define ROWS_MIN        480
83
84 struct pci_fbuf_softc {
85         struct pci_devinst *fsc_pi;
86         struct {
87                 uint32_t fbsize;
88                 uint16_t width;
89                 uint16_t height;
90                 uint16_t depth;
91                 uint16_t refreshrate;
92                 uint8_t  reserved[116];
93         } __packed memregs;
94
95         /* rfb server */
96         char      *rfb_host;
97         char      *rfb_password;
98         int       rfb_port;
99         int       rfb_wait;
100         int       vga_enabled;
101         int       vga_full;
102
103         uint32_t  fbaddr;
104         char      *fb_base;
105         uint16_t  gc_width;
106         uint16_t  gc_height;
107         void      *vgasc;
108         struct bhyvegc_image *gc_image;
109 };
110
111 static struct pci_fbuf_softc *fbuf_sc;
112
113 #define PCI_FBUF_MSI_MSGS        4
114
115 static void
116 pci_fbuf_write(struct pci_devinst *pi, int baridx, uint64_t offset, int size,
117     uint64_t value)
118 {
119         struct pci_fbuf_softc *sc;
120         uint8_t *p;
121
122         assert(baridx == 0);
123
124         sc = pi->pi_arg;
125
126         DPRINTF(DEBUG_VERBOSE,
127             ("fbuf wr: offset 0x%lx, size: %d, value: 0x%lx",
128             offset, size, value));
129
130         if (offset + size > DMEMSZ) {
131                 printf("fbuf: write too large, offset %ld size %d\n",
132                        offset, size);
133                 return;
134         }
135
136         p = (uint8_t *)&sc->memregs + offset;
137
138         switch (size) {
139         case 1:
140                 *p = value;
141                 break;
142         case 2:
143                 *(uint16_t *)p = value;
144                 break;
145         case 4:
146                 *(uint32_t *)p = value;
147                 break;
148         case 8:
149                 *(uint64_t *)p = value;
150                 break;
151         default:
152                 printf("fbuf: write unknown size %d\n", size);
153                 break;
154         }
155
156         if (!sc->gc_image->vgamode && sc->memregs.width == 0 &&
157             sc->memregs.height == 0) {
158                 DPRINTF(DEBUG_INFO, ("switching to VGA mode"));
159                 sc->gc_image->vgamode = 1;
160                 sc->gc_width = 0;
161                 sc->gc_height = 0;
162         } else if (sc->gc_image->vgamode && sc->memregs.width != 0 &&
163             sc->memregs.height != 0) {
164                 DPRINTF(DEBUG_INFO, ("switching to VESA mode"));
165                 sc->gc_image->vgamode = 0;
166         }
167 }
168
169 static uint64_t
170 pci_fbuf_read(struct pci_devinst *pi, int baridx, uint64_t offset, int size)
171 {
172         struct pci_fbuf_softc *sc;
173         uint8_t *p;
174         uint64_t value;
175
176         assert(baridx == 0);
177
178         sc = pi->pi_arg;
179
180
181         if (offset + size > DMEMSZ) {
182                 printf("fbuf: read too large, offset %ld size %d\n",
183                        offset, size);
184                 return (0);
185         }
186
187         p = (uint8_t *)&sc->memregs + offset;
188         value = 0;
189         switch (size) {
190         case 1:
191                 value = *p;
192                 break;
193         case 2:
194                 value = *(uint16_t *)p;
195                 break;
196         case 4:
197                 value = *(uint32_t *)p;
198                 break;
199         case 8:
200                 value = *(uint64_t *)p;
201                 break;
202         default:
203                 printf("fbuf: read unknown size %d\n", size);
204                 break;
205         }
206
207         DPRINTF(DEBUG_VERBOSE,
208             ("fbuf rd: offset 0x%lx, size: %d, value: 0x%lx",
209              offset, size, value));
210
211         return (value);
212 }
213
214 static void
215 pci_fbuf_baraddr(struct pci_devinst *pi, int baridx, int enabled,
216     uint64_t address)
217 {
218         struct pci_fbuf_softc *sc;
219         int prot;
220
221         if (baridx != 1)
222                 return;
223
224         sc = pi->pi_arg;
225         if (!enabled) {
226                 if (vm_munmap_memseg(pi->pi_vmctx, sc->fbaddr, FB_SIZE) != 0)
227                         EPRINTLN("pci_fbuf: munmap_memseg failed");
228                 sc->fbaddr = 0;
229         } else {
230                 prot = PROT_READ | PROT_WRITE;
231                 if (vm_mmap_memseg(pi->pi_vmctx, address, VM_FRAMEBUFFER, 0,
232                     FB_SIZE, prot) != 0)
233                         EPRINTLN("pci_fbuf: mmap_memseg failed");
234                 sc->fbaddr = address;
235         }
236 }
237
238
239 static int
240 pci_fbuf_parse_config(struct pci_fbuf_softc *sc, nvlist_t *nvl)
241 {
242         const char *value;
243         char *cp;
244
245         sc->rfb_wait = get_config_bool_node_default(nvl, "wait", false);
246
247         /* Prefer "rfb" to "tcp". */
248         value = get_config_value_node(nvl, "rfb");
249         if (value == NULL)
250                 value = get_config_value_node(nvl, "tcp");
251         if (value != NULL) {
252                 /*
253                  * IPv4 -- host-ip:port
254                  * IPv6 -- [host-ip%zone]:port
255                  * XXX for now port is mandatory for IPv4.
256                  */
257                 if (value[0] == '[') {
258                         cp = strchr(value + 1, ']');
259                         if (cp == NULL || cp == value + 1) {
260                                 EPRINTLN("fbuf: Invalid IPv6 address: \"%s\"",
261                                     value);
262                                 return (-1);
263                         }
264                         sc->rfb_host = strndup(value + 1, cp - (value + 1));
265                         cp++;
266                         if (*cp == ':') {
267                                 cp++;
268                                 if (*cp == '\0') {
269                                         EPRINTLN(
270                                             "fbuf: Missing port number: \"%s\"",
271                                             value);
272                                         return (-1);
273                                 }
274                                 sc->rfb_port = atoi(cp);
275                         } else if (*cp != '\0') {
276                                 EPRINTLN("fbuf: Invalid IPv6 address: \"%s\"",
277                                     value);
278                                 return (-1);
279                         }
280                 } else {
281                         cp = strchr(value, ':');
282                         if (cp == NULL) {
283                                 sc->rfb_port = atoi(value);
284                         } else {
285                                 sc->rfb_host = strndup(value, cp - value);
286                                 cp++;
287                                 if (*cp == '\0') {
288                                         EPRINTLN(
289                                             "fbuf: Missing port number: \"%s\"",
290                                             value);
291                                         return (-1);
292                                 }
293                                 sc->rfb_port = atoi(cp);
294                         }
295                 }
296         }
297
298         value = get_config_value_node(nvl, "vga");
299         if (value != NULL) {
300                 if (strcmp(value, "off") == 0) {
301                         sc->vga_enabled = 0;
302                 } else if (strcmp(value, "io") == 0) {
303                         sc->vga_enabled = 1;
304                         sc->vga_full = 0;
305                 } else if (strcmp(value, "on") == 0) {
306                         sc->vga_enabled = 1;
307                         sc->vga_full = 1;
308                 } else {
309                         EPRINTLN("fbuf: Invalid vga setting: \"%s\"", value);
310                         return (-1);
311                 }
312         }
313
314         value = get_config_value_node(nvl, "w");
315         if (value != NULL)
316                 sc->memregs.width = strtol(value, NULL, 10);
317
318         value = get_config_value_node(nvl, "h");
319         if (value != NULL)
320                 sc->memregs.height = strtol(value, NULL, 10);
321
322         if (sc->memregs.width > COLS_MAX ||
323             sc->memregs.height > ROWS_MAX) {
324                 EPRINTLN("fbuf: max resolution is %ux%u", COLS_MAX, ROWS_MAX);
325                 return (-1);
326         }
327         if (sc->memregs.width < COLS_MIN ||
328             sc->memregs.height < ROWS_MIN) {
329                 EPRINTLN("fbuf: minimum resolution is %ux%u",
330                     COLS_MIN, ROWS_MIN);
331                 return (-1);
332         }
333
334         value = get_config_value_node(nvl, "password");
335         if (value != NULL)
336                 sc->rfb_password = strdup(value);
337
338         return (0);
339 }
340
341 static void
342 pci_fbuf_render(struct bhyvegc *gc, void *arg)
343 {
344         struct pci_fbuf_softc *sc;
345
346         sc = arg;
347
348         if (sc->vga_full && sc->gc_image->vgamode) {
349                 /* TODO: mode switching to vga and vesa should use the special
350                  *      EFI-bhyve protocol port.
351                  */
352                 vga_render(gc, sc->vgasc);
353                 return;
354         }
355         if (sc->gc_width != sc->memregs.width ||
356             sc->gc_height != sc->memregs.height) {
357                 bhyvegc_resize(gc, sc->memregs.width, sc->memregs.height);
358                 sc->gc_width = sc->memregs.width;
359                 sc->gc_height = sc->memregs.height;
360         }
361 }
362
363 static int
364 pci_fbuf_init(struct pci_devinst *pi, nvlist_t *nvl)
365 {
366         int error;
367         struct pci_fbuf_softc *sc;
368
369         if (fbuf_sc != NULL) {
370                 EPRINTLN("Only one frame buffer device is allowed.");
371                 return (-1);
372         }
373
374         sc = calloc(1, sizeof(struct pci_fbuf_softc));
375
376         pi->pi_arg = sc;
377
378         /* initialize config space */
379         pci_set_cfgdata16(pi, PCIR_DEVICE, 0x40FB);
380         pci_set_cfgdata16(pi, PCIR_VENDOR, 0xFB5D);
381         pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_DISPLAY);
382         pci_set_cfgdata8(pi, PCIR_SUBCLASS, PCIS_DISPLAY_VGA);
383
384         sc->fb_base = vm_create_devmem(pi->pi_vmctx, VM_FRAMEBUFFER,
385             "framebuffer", FB_SIZE);
386         if (sc->fb_base == MAP_FAILED) {
387                 error = -1;
388                 goto done;
389         }
390
391         error = pci_emul_alloc_bar(pi, 0, PCIBAR_MEM32, DMEMSZ);
392         assert(error == 0);
393
394         error = pci_emul_alloc_bar(pi, 1, PCIBAR_MEM32, FB_SIZE);
395         assert(error == 0);
396
397         error = pci_emul_add_msicap(pi, PCI_FBUF_MSI_MSGS);
398         assert(error == 0);
399
400         sc->memregs.fbsize = FB_SIZE;
401         sc->memregs.width  = COLS_DEFAULT;
402         sc->memregs.height = ROWS_DEFAULT;
403         sc->memregs.depth  = 32;
404
405         sc->vga_enabled = 1;
406         sc->vga_full = 0;
407
408         sc->fsc_pi = pi;
409
410         error = pci_fbuf_parse_config(sc, nvl);
411         if (error != 0)
412                 goto done;
413
414         /* XXX until VGA rendering is enabled */
415         if (sc->vga_full != 0) {
416                 EPRINTLN("pci_fbuf: VGA rendering not enabled");
417                 goto done;
418         }
419
420         DPRINTF(DEBUG_INFO, ("fbuf frame buffer base: %p [sz %lu]",
421                 sc->fb_base, FB_SIZE));
422
423         console_init(sc->memregs.width, sc->memregs.height, sc->fb_base);
424         console_fb_register(pci_fbuf_render, sc);
425
426         if (sc->vga_enabled)
427                 sc->vgasc = vga_init(!sc->vga_full);
428         sc->gc_image = console_get_image();
429
430         fbuf_sc = sc;
431
432         memset((void *)sc->fb_base, 0, FB_SIZE);
433
434         error = rfb_init(sc->rfb_host, sc->rfb_port, sc->rfb_wait, sc->rfb_password);
435 done:
436         if (error)
437                 free(sc);
438
439         return (error);
440 }
441
442 #ifdef BHYVE_SNAPSHOT
443 static int
444 pci_fbuf_snapshot(struct vm_snapshot_meta *meta)
445 {
446         int ret;
447
448         SNAPSHOT_BUF_OR_LEAVE(fbuf_sc->fb_base, FB_SIZE, meta, ret, err);
449
450 err:
451         return (ret);
452 }
453 #endif
454
455 static const struct pci_devemu pci_fbuf = {
456         .pe_emu =       "fbuf",
457         .pe_init =      pci_fbuf_init,
458         .pe_barwrite =  pci_fbuf_write,
459         .pe_barread =   pci_fbuf_read,
460         .pe_baraddr =   pci_fbuf_baraddr,
461 #ifdef BHYVE_SNAPSHOT
462         .pe_snapshot =  pci_fbuf_snapshot,
463 #endif
464 };
465 PCI_EMUL_SET(pci_fbuf);