1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 /*
30 * Simple driver for PCI VGA display devices. Drivers such as agp(4) and
31 * drm(4) should attach as children of this device.
32 *
33 * XXX: The vgapci name is a hack until we somehow merge the isa vga driver
34 * in or rename it.
35 */
36
37 #include <sys/param.h>
38 #include <sys/bus.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41 #include <sys/rman.h>
42 #include <sys/sysctl.h>
43 #include <sys/systm.h>
44
45 #if defined(__amd64__) || defined(__i386__)
46 #include <vm/vm.h>
47 #include <vm/pmap.h>
48 #endif
49
50 #include <dev/pci/pcireg.h>
51 #include <dev/pci/pcivar.h>
52
53 #include <compat/x86bios/x86bios.h> /* To re-POST the card. */
54
55 struct vga_resource {
56 struct resource *vr_res;
57 int vr_refs;
58 };
59
60 struct vga_pci_softc {
61 device_t vga_msi_child; /* Child driver using MSI. */
62 struct vga_resource vga_bars[PCIR_MAX_BAR_0 + 1];
63 struct vga_resource vga_bios;
64 };
65
66 SYSCTL_DECL(_hw_pci);
67
68 static struct vga_resource *lookup_res(struct vga_pci_softc *sc, int rid);
69 static struct resource *vga_pci_alloc_resource(device_t dev, device_t child,
70 int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count,
71 u_int flags);
72 static int vga_pci_release_resource(device_t dev, device_t child,
73 struct resource *r);
74
75 int vga_pci_default_unit = -1;
76 SYSCTL_INT(_hw_pci, OID_AUTO, default_vgapci_unit, CTLFLAG_RDTUN,
77 &vga_pci_default_unit, -1, "Default VGA-compatible display");
78
79 int
vga_pci_is_boot_display(device_t dev)80 vga_pci_is_boot_display(device_t dev)
81 {
82 int unit;
83 device_t pcib;
84 uint16_t config;
85
86 /* Check that the given device is a video card */
87 if ((pci_get_class(dev) != PCIC_DISPLAY &&
88 (pci_get_class(dev) != PCIC_OLD ||
89 pci_get_subclass(dev) != PCIS_OLD_VGA)))
90 return (0);
91
92 unit = device_get_unit(dev);
93
94 if (vga_pci_default_unit >= 0) {
95 /*
96 * The boot display device was determined by a previous
97 * call to this function, or the user forced it using
98 * the hw.pci.default_vgapci_unit tunable.
99 */
100 return (vga_pci_default_unit == unit);
101 }
102
103 /*
104 * The primary video card used as a boot display must have the
105 * "I/O" and "Memory Address Space Decoding" bits set in its
106 * Command register.
107 *
108 * Furthermore, if the card is attached to a bridge, instead of
109 * the root PCI bus, the bridge must have the "VGA Enable" bit
110 * set in its Control register.
111 */
112
113 pcib = device_get_parent(device_get_parent(dev));
114 if (device_get_devclass(device_get_parent(pcib)) ==
115 devclass_find("pci")) {
116 /*
117 * The parent bridge is a PCI-to-PCI bridge: check the
118 * value of the "VGA Enable" bit.
119 */
120 config = pci_read_config(pcib, PCIR_BRIDGECTL_1, 2);
121 if ((config & PCIB_BCR_VGA_ENABLE) == 0)
122 return (0);
123 }
124
125 config = pci_read_config(dev, PCIR_COMMAND, 2);
126 if ((config & (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN)) == 0)
127 return (0);
128
129 /*
130 * Disable interrupts until a chipset driver is loaded for
131 * this PCI device. Else unhandled display adapter interrupts
132 * might freeze the CPU.
133 */
134 pci_write_config(dev, PCIR_COMMAND, config | PCIM_CMD_INTxDIS, 2);
135
136 /* This video card is the boot display: record its unit number. */
137 vga_pci_default_unit = unit;
138 device_set_flags(dev, 1);
139
140 return (1);
141 }
142
143 static void
vga_pci_reset(device_t dev)144 vga_pci_reset(device_t dev)
145 {
146 int ps;
147 /*
148 * FLR is unsupported on GPUs so attempt a power-management reset by cycling
149 * the device in/out of D3 state.
150 * PCI spec says we can only go into D3 state from D0 state.
151 * Transition from D[12] into D0 before going to D3 state.
152 */
153 ps = pci_get_powerstate(dev);
154 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
155 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
156 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3)
157 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
158 pci_set_powerstate(dev, ps);
159 }
160
161 void *
vga_pci_map_bios(device_t dev,size_t * size)162 vga_pci_map_bios(device_t dev, size_t *size)
163 {
164 struct vga_resource *vr;
165 struct resource *res;
166 device_t pcib;
167 uint32_t rom_addr;
168 uint16_t config;
169 volatile unsigned char *bios;
170 int i, rid, found;
171
172 #if defined(__amd64__) || defined(__i386__)
173 if (vga_pci_is_boot_display(dev)) {
174 /*
175 * On x86, the System BIOS copy the default display
176 * device's Video BIOS at a fixed location in system
177 * memory (0xC0000, 128 kBytes long) at boot time.
178 *
179 * We use this copy for the default boot device, because
180 * the original ROM may not be valid after boot.
181 */
182
183 *size = VGA_PCI_BIOS_SHADOW_SIZE;
184 return (pmap_mapbios(VGA_PCI_BIOS_SHADOW_ADDR, *size));
185 }
186 #endif
187
188 pcib = device_get_parent(device_get_parent(dev));
189 if (device_get_devclass(device_get_parent(pcib)) ==
190 devclass_find("pci")) {
191 /*
192 * The parent bridge is a PCI-to-PCI bridge: check the
193 * value of the "VGA Enable" bit.
194 */
195 config = pci_read_config(pcib, PCIR_BRIDGECTL_1, 2);
196 if ((config & PCIB_BCR_VGA_ENABLE) == 0) {
197 config |= PCIB_BCR_VGA_ENABLE;
198 pci_write_config(pcib, PCIR_BRIDGECTL_1, config, 2);
199 }
200 }
201
202 switch(pci_read_config(dev, PCIR_HDRTYPE, 1)) {
203 case PCIM_HDRTYPE_BRIDGE:
204 rid = PCIR_BIOS_1;
205 break;
206 case PCIM_HDRTYPE_CARDBUS:
207 rid = 0;
208 break;
209 default:
210 rid = PCIR_BIOS;
211 break;
212 }
213 if (rid == 0)
214 return (NULL);
215 res = vga_pci_alloc_resource(dev, NULL, SYS_RES_MEMORY, &rid, 0,
216 ~0, 1, RF_ACTIVE);
217
218 if (res == NULL) {
219 device_printf(dev, "vga_pci_alloc_resource failed\n");
220 return (NULL);
221 }
222 bios = rman_get_virtual(res);
223 *size = rman_get_size(res);
224 for (found = i = 0; i < hz; i++) {
225 found = (bios[0] == 0x55 && bios[1] == 0xaa);
226 if (found)
227 break;
228 pause("vgabios", 1);
229 }
230 if (found)
231 return (__DEVOLATILE(void *, bios));
232 if (bootverbose)
233 device_printf(dev, "initial ROM mapping failed -- resetting\n");
234
235 /*
236 * Enable ROM decode
237 */
238 vga_pci_reset(dev);
239 rom_addr = pci_read_config(dev, rid, 4);
240 rom_addr &= 0x7ff;
241 rom_addr |= rman_get_start(res) | 0x1;
242 pci_write_config(dev, rid, rom_addr, 4);
243 vr = lookup_res(device_get_softc(dev), rid);
244 vga_pci_release_resource(dev, NULL, vr->vr_res);
245
246 /*
247 * re-allocate
248 */
249 res = vga_pci_alloc_resource(dev, NULL, SYS_RES_MEMORY, &rid, 0,
250 ~0, 1, RF_ACTIVE);
251 if (res == NULL) {
252 device_printf(dev, "vga_pci_alloc_resource failed\n");
253 return (NULL);
254 }
255 bios = rman_get_virtual(res);
256 *size = rman_get_size(res);
257 for (found = i = 0; i < 3*hz; i++) {
258 found = (bios[0] == 0x55 && bios[1] == 0xaa);
259 if (found)
260 break;
261 pause("vgabios", 1);
262 }
263 if (found)
264 return (__DEVOLATILE(void *, bios));
265 device_printf(dev, "ROM mapping failed\n");
266 vr = lookup_res(device_get_softc(dev), rid);
267 vga_pci_release_resource(dev, NULL, vr->vr_res);
268 return (NULL);
269 }
270
271 void
vga_pci_unmap_bios(device_t dev,void * bios)272 vga_pci_unmap_bios(device_t dev, void *bios)
273 {
274 struct vga_resource *vr;
275 int rid;
276
277 if (bios == NULL) {
278 return;
279 }
280
281 #if defined(__amd64__) || defined(__i386__)
282 if (vga_pci_is_boot_display(dev)) {
283 /* We mapped the BIOS shadow copy located at 0xC0000. */
284 pmap_unmapdev(bios, VGA_PCI_BIOS_SHADOW_SIZE);
285
286 return;
287 }
288 #endif
289 switch(pci_read_config(dev, PCIR_HDRTYPE, 1)) {
290 case PCIM_HDRTYPE_BRIDGE:
291 rid = PCIR_BIOS_1;
292 break;
293 case PCIM_HDRTYPE_CARDBUS:
294 rid = 0;
295 break;
296 default:
297 rid = PCIR_BIOS;
298 break;
299 }
300 if (rid == 0)
301 return;
302 /*
303 * Look up the PCIR_BIOS resource in our softc. It should match
304 * the address we returned previously.
305 */
306 vr = lookup_res(device_get_softc(dev), rid);
307 KASSERT(vr->vr_res != NULL, ("vga_pci_unmap_bios: bios not mapped"));
308 KASSERT(rman_get_virtual(vr->vr_res) == bios,
309 ("vga_pci_unmap_bios: mismatch"));
310 vga_pci_release_resource(dev, NULL, vr->vr_res);
311 }
312
313 int
vga_pci_repost(device_t dev)314 vga_pci_repost(device_t dev)
315 {
316 #if defined(__amd64__) || defined(__i386__)
317 x86regs_t regs;
318
319 if (!vga_pci_is_boot_display(dev))
320 return (EINVAL);
321
322 if (x86bios_get_orm(VGA_PCI_BIOS_SHADOW_ADDR) == NULL)
323 return (ENOTSUP);
324
325 x86bios_init_regs(®s);
326
327 regs.R_AH = pci_get_bus(dev);
328 regs.R_AL = (pci_get_slot(dev) << 3) | (pci_get_function(dev) & 0x07);
329 regs.R_DL = 0x80;
330
331 device_printf(dev, "REPOSTing\n");
332 x86bios_call(®s, X86BIOS_PHYSTOSEG(VGA_PCI_BIOS_SHADOW_ADDR + 3),
333 X86BIOS_PHYSTOOFF(VGA_PCI_BIOS_SHADOW_ADDR + 3));
334
335 x86bios_get_intr(0x10);
336
337 return (0);
338 #else
339 return (ENOTSUP);
340 #endif
341 }
342
343 static int
vga_pci_probe(device_t dev)344 vga_pci_probe(device_t dev)
345 {
346
347 switch (pci_get_class(dev)) {
348 case PCIC_DISPLAY:
349 break;
350 case PCIC_OLD:
351 if (pci_get_subclass(dev) != PCIS_OLD_VGA)
352 return (ENXIO);
353 break;
354 default:
355 return (ENXIO);
356 }
357
358 /* Probe default display. */
359 vga_pci_is_boot_display(dev);
360
361 device_set_desc(dev, "VGA-compatible display");
362 return (BUS_PROBE_GENERIC);
363 }
364
365 static int
vga_pci_attach(device_t dev)366 vga_pci_attach(device_t dev)
367 {
368
369 bus_generic_probe(dev);
370
371 /* Always create a drmn child for now to make it easier on drm. */
372 device_add_child(dev, "drmn", DEVICE_UNIT_ANY);
373 bus_generic_attach(dev);
374
375 if (vga_pci_is_boot_display(dev))
376 device_printf(dev, "Boot video device\n");
377
378 return (0);
379 }
380
381 static int
vga_pci_detach(device_t dev)382 vga_pci_detach(device_t dev)
383 {
384 int error;
385
386 error = bus_generic_detach(dev);
387 if (error == 0)
388 error = device_delete_children(dev);
389 return (error);
390 }
391
392 /* Bus interface. */
393
394 static int
vga_pci_read_ivar(device_t dev,device_t child,int which,uintptr_t * result)395 vga_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
396 {
397
398 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result));
399 }
400
401 static int
vga_pci_write_ivar(device_t dev,device_t child,int which,uintptr_t value)402 vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
403 {
404
405 return (EINVAL);
406 }
407
408 static int
vga_pci_setup_intr(device_t dev,device_t child,struct resource * irq,int flags,driver_filter_t * filter,driver_intr_t * intr,void * arg,void ** cookiep)409 vga_pci_setup_intr(device_t dev, device_t child, struct resource *irq,
410 int flags, driver_filter_t *filter, driver_intr_t *intr, void *arg,
411 void **cookiep)
412 {
413 return (BUS_SETUP_INTR(device_get_parent(dev), dev, irq, flags,
414 filter, intr, arg, cookiep));
415 }
416
417 static int
vga_pci_teardown_intr(device_t dev,device_t child,struct resource * irq,void * cookie)418 vga_pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
419 void *cookie)
420 {
421 return (BUS_TEARDOWN_INTR(device_get_parent(dev), dev, irq, cookie));
422 }
423
424 static struct vga_resource *
lookup_res(struct vga_pci_softc * sc,int rid)425 lookup_res(struct vga_pci_softc *sc, int rid)
426 {
427 int bar;
428
429 if (rid == PCIR_BIOS)
430 return (&sc->vga_bios);
431 bar = PCI_RID2BAR(rid);
432 if (bar >= 0 && bar <= PCIR_MAX_BAR_0)
433 return (&sc->vga_bars[bar]);
434 return (NULL);
435 }
436
437 static struct resource *
vga_pci_alloc_resource(device_t dev,device_t child,int type,int * rid,rman_res_t start,rman_res_t end,rman_res_t count,u_int flags)438 vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
439 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
440 {
441 struct vga_resource *vr;
442
443 switch (type) {
444 case SYS_RES_MEMORY:
445 case SYS_RES_IOPORT:
446 /*
447 * For BARs, we cache the resource so that we only allocate it
448 * from the PCI bus once.
449 */
450 vr = lookup_res(device_get_softc(dev), *rid);
451 if (vr == NULL)
452 return (NULL);
453 if (vr->vr_res == NULL)
454 vr->vr_res = bus_alloc_resource(dev, type, rid, start,
455 end, count, flags);
456 if (vr->vr_res != NULL)
457 vr->vr_refs++;
458 return (vr->vr_res);
459 }
460 return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
461 }
462
463 static int
vga_pci_release_resource(device_t dev,device_t child,struct resource * r)464 vga_pci_release_resource(device_t dev, device_t child, struct resource *r)
465 {
466 struct vga_resource *vr;
467 int error;
468
469 switch (rman_get_type(r)) {
470 case SYS_RES_MEMORY:
471 case SYS_RES_IOPORT:
472 /*
473 * For BARs, we release the resource from the PCI bus
474 * when the last child reference goes away.
475 */
476 vr = lookup_res(device_get_softc(dev), rman_get_rid(r));
477 if (vr == NULL)
478 return (EINVAL);
479 if (vr->vr_res == NULL)
480 return (EINVAL);
481 KASSERT(vr->vr_res == r, ("vga_pci resource mismatch"));
482 if (vr->vr_refs > 1) {
483 vr->vr_refs--;
484 return (0);
485 }
486 KASSERT(vr->vr_refs > 0,
487 ("vga_pci resource reference count underflow"));
488 error = bus_release_resource(dev, r);
489 if (error == 0) {
490 vr->vr_res = NULL;
491 vr->vr_refs = 0;
492 }
493 return (error);
494 }
495
496 return (bus_release_resource(dev, r));
497 }
498
499 /* PCI interface. */
500
501 static uint32_t
vga_pci_read_config(device_t dev,device_t child,int reg,int width)502 vga_pci_read_config(device_t dev, device_t child, int reg, int width)
503 {
504
505 return (pci_read_config(dev, reg, width));
506 }
507
508 static void
vga_pci_write_config(device_t dev,device_t child,int reg,uint32_t val,int width)509 vga_pci_write_config(device_t dev, device_t child, int reg,
510 uint32_t val, int width)
511 {
512
513 pci_write_config(dev, reg, val, width);
514 }
515
516 static int
vga_pci_enable_busmaster(device_t dev,device_t child)517 vga_pci_enable_busmaster(device_t dev, device_t child)
518 {
519
520 return (pci_enable_busmaster(dev));
521 }
522
523 static int
vga_pci_disable_busmaster(device_t dev,device_t child)524 vga_pci_disable_busmaster(device_t dev, device_t child)
525 {
526
527 return (pci_disable_busmaster(dev));
528 }
529
530 static int
vga_pci_enable_io(device_t dev,device_t child,int space)531 vga_pci_enable_io(device_t dev, device_t child, int space)
532 {
533
534 device_printf(dev, "child %s requested pci_enable_io\n",
535 device_get_nameunit(child));
536 return (pci_enable_io(dev, space));
537 }
538
539 static int
vga_pci_disable_io(device_t dev,device_t child,int space)540 vga_pci_disable_io(device_t dev, device_t child, int space)
541 {
542
543 device_printf(dev, "child %s requested pci_disable_io\n",
544 device_get_nameunit(child));
545 return (pci_disable_io(dev, space));
546 }
547
548 static int
vga_pci_get_vpd_ident(device_t dev,device_t child,const char ** identptr)549 vga_pci_get_vpd_ident(device_t dev, device_t child, const char **identptr)
550 {
551
552 return (pci_get_vpd_ident(dev, identptr));
553 }
554
555 static int
vga_pci_get_vpd_readonly(device_t dev,device_t child,const char * kw,const char ** vptr)556 vga_pci_get_vpd_readonly(device_t dev, device_t child, const char *kw,
557 const char **vptr)
558 {
559
560 return (pci_get_vpd_readonly(dev, kw, vptr));
561 }
562
563 static int
vga_pci_set_powerstate(device_t dev,device_t child,int state)564 vga_pci_set_powerstate(device_t dev, device_t child, int state)
565 {
566
567 device_printf(dev, "child %s requested pci_set_powerstate\n",
568 device_get_nameunit(child));
569 return (pci_set_powerstate(dev, state));
570 }
571
572 static int
vga_pci_get_powerstate(device_t dev,device_t child)573 vga_pci_get_powerstate(device_t dev, device_t child)
574 {
575
576 device_printf(dev, "child %s requested pci_get_powerstate\n",
577 device_get_nameunit(child));
578 return (pci_get_powerstate(dev));
579 }
580
581 static int
vga_pci_assign_interrupt(device_t dev,device_t child)582 vga_pci_assign_interrupt(device_t dev, device_t child)
583 {
584
585 device_printf(dev, "child %s requested pci_assign_interrupt\n",
586 device_get_nameunit(child));
587 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev));
588 }
589
590 static int
vga_pci_find_cap(device_t dev,device_t child,int capability,int * capreg)591 vga_pci_find_cap(device_t dev, device_t child, int capability,
592 int *capreg)
593 {
594
595 return (pci_find_cap(dev, capability, capreg));
596 }
597
598 static int
vga_pci_find_next_cap(device_t dev,device_t child,int capability,int start,int * capreg)599 vga_pci_find_next_cap(device_t dev, device_t child, int capability,
600 int start, int *capreg)
601 {
602
603 return (pci_find_next_cap(dev, capability, start, capreg));
604 }
605
606 static int
vga_pci_find_extcap(device_t dev,device_t child,int capability,int * capreg)607 vga_pci_find_extcap(device_t dev, device_t child, int capability,
608 int *capreg)
609 {
610
611 return (pci_find_extcap(dev, capability, capreg));
612 }
613
614 static int
vga_pci_find_next_extcap(device_t dev,device_t child,int capability,int start,int * capreg)615 vga_pci_find_next_extcap(device_t dev, device_t child, int capability,
616 int start, int *capreg)
617 {
618
619 return (pci_find_next_extcap(dev, capability, start, capreg));
620 }
621
622 static int
vga_pci_find_htcap(device_t dev,device_t child,int capability,int * capreg)623 vga_pci_find_htcap(device_t dev, device_t child, int capability,
624 int *capreg)
625 {
626
627 return (pci_find_htcap(dev, capability, capreg));
628 }
629
630 static int
vga_pci_find_next_htcap(device_t dev,device_t child,int capability,int start,int * capreg)631 vga_pci_find_next_htcap(device_t dev, device_t child, int capability,
632 int start, int *capreg)
633 {
634
635 return (pci_find_next_htcap(dev, capability, start, capreg));
636 }
637
638 static int
vga_pci_alloc_msi(device_t dev,device_t child,int * count)639 vga_pci_alloc_msi(device_t dev, device_t child, int *count)
640 {
641 struct vga_pci_softc *sc;
642 int error;
643
644 sc = device_get_softc(dev);
645 if (sc->vga_msi_child != NULL)
646 return (EBUSY);
647 error = pci_alloc_msi(dev, count);
648 if (error == 0)
649 sc->vga_msi_child = child;
650 return (error);
651 }
652
653 static int
vga_pci_alloc_msix(device_t dev,device_t child,int * count)654 vga_pci_alloc_msix(device_t dev, device_t child, int *count)
655 {
656 struct vga_pci_softc *sc;
657 int error;
658
659 sc = device_get_softc(dev);
660 if (sc->vga_msi_child != NULL)
661 return (EBUSY);
662 error = pci_alloc_msix(dev, count);
663 if (error == 0)
664 sc->vga_msi_child = child;
665 return (error);
666 }
667
668 static int
vga_pci_remap_msix(device_t dev,device_t child,int count,const u_int * vectors)669 vga_pci_remap_msix(device_t dev, device_t child, int count,
670 const u_int *vectors)
671 {
672 struct vga_pci_softc *sc;
673
674 sc = device_get_softc(dev);
675 if (sc->vga_msi_child != child)
676 return (ENXIO);
677 return (pci_remap_msix(dev, count, vectors));
678 }
679
680 static int
vga_pci_release_msi(device_t dev,device_t child)681 vga_pci_release_msi(device_t dev, device_t child)
682 {
683 struct vga_pci_softc *sc;
684 int error;
685
686 sc = device_get_softc(dev);
687 if (sc->vga_msi_child != child)
688 return (ENXIO);
689 error = pci_release_msi(dev);
690 if (error == 0)
691 sc->vga_msi_child = NULL;
692 return (error);
693 }
694
695 static int
vga_pci_msi_count(device_t dev,device_t child)696 vga_pci_msi_count(device_t dev, device_t child)
697 {
698
699 return (pci_msi_count(dev));
700 }
701
702 static int
vga_pci_msix_count(device_t dev,device_t child)703 vga_pci_msix_count(device_t dev, device_t child)
704 {
705
706 return (pci_msix_count(dev));
707 }
708
709 static bus_dma_tag_t
vga_pci_get_dma_tag(device_t bus,device_t child)710 vga_pci_get_dma_tag(device_t bus, device_t child)
711 {
712
713 return (bus_get_dma_tag(bus));
714 }
715
716 static device_method_t vga_pci_methods[] = {
717 /* Device interface */
718 DEVMETHOD(device_probe, vga_pci_probe),
719 DEVMETHOD(device_attach, vga_pci_attach),
720 DEVMETHOD(device_shutdown, bus_generic_shutdown),
721 DEVMETHOD(device_suspend, bus_generic_suspend),
722 DEVMETHOD(device_detach, vga_pci_detach),
723 DEVMETHOD(device_resume, bus_generic_resume),
724
725 /* Bus interface */
726 DEVMETHOD(bus_read_ivar, vga_pci_read_ivar),
727 DEVMETHOD(bus_write_ivar, vga_pci_write_ivar),
728 DEVMETHOD(bus_setup_intr, vga_pci_setup_intr),
729 DEVMETHOD(bus_teardown_intr, vga_pci_teardown_intr),
730 DEVMETHOD(bus_alloc_resource, vga_pci_alloc_resource),
731 DEVMETHOD(bus_release_resource, vga_pci_release_resource),
732 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
733 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
734 DEVMETHOD(bus_get_dma_tag, vga_pci_get_dma_tag),
735
736 /* PCI interface */
737 DEVMETHOD(pci_read_config, vga_pci_read_config),
738 DEVMETHOD(pci_write_config, vga_pci_write_config),
739 DEVMETHOD(pci_enable_busmaster, vga_pci_enable_busmaster),
740 DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster),
741 DEVMETHOD(pci_enable_io, vga_pci_enable_io),
742 DEVMETHOD(pci_disable_io, vga_pci_disable_io),
743 DEVMETHOD(pci_get_vpd_ident, vga_pci_get_vpd_ident),
744 DEVMETHOD(pci_get_vpd_readonly, vga_pci_get_vpd_readonly),
745 DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate),
746 DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate),
747 DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt),
748 DEVMETHOD(pci_find_cap, vga_pci_find_cap),
749 DEVMETHOD(pci_find_next_cap, vga_pci_find_next_cap),
750 DEVMETHOD(pci_find_extcap, vga_pci_find_extcap),
751 DEVMETHOD(pci_find_next_extcap, vga_pci_find_next_extcap),
752 DEVMETHOD(pci_find_htcap, vga_pci_find_htcap),
753 DEVMETHOD(pci_find_next_htcap, vga_pci_find_next_htcap),
754 DEVMETHOD(pci_alloc_msi, vga_pci_alloc_msi),
755 DEVMETHOD(pci_alloc_msix, vga_pci_alloc_msix),
756 DEVMETHOD(pci_remap_msix, vga_pci_remap_msix),
757 DEVMETHOD(pci_release_msi, vga_pci_release_msi),
758 DEVMETHOD(pci_msi_count, vga_pci_msi_count),
759 DEVMETHOD(pci_msix_count, vga_pci_msix_count),
760 { 0, 0 }
761 };
762
763 static driver_t vga_pci_driver = {
764 "vgapci",
765 vga_pci_methods,
766 sizeof(struct vga_pci_softc),
767 };
768
769 DRIVER_MODULE(vgapci, pci, vga_pci_driver, 0, 0);
770 MODULE_DEPEND(vgapci, x86bios, 1, 1, 1);
771