2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2011 NetApp, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``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 NETAPP, INC 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
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/linker_set.h>
50 #include <machine/vmm.h>
51 #include <machine/vmm_snapshot.h>
65 #define CONF1_ADDR_PORT 0x0cf8
66 #define CONF1_DATA_PORT 0x0cfc
68 #define CONF1_ENABLE 0x80000000ul
70 #define MAXBUSES (PCI_BUSMAX + 1)
71 #define MAXSLOTS (PCI_SLOTMAX + 1)
72 #define MAXFUNCS (PCI_FUNCMAX + 1)
74 #define GB (1024 * 1024 * 1024UL)
78 struct pci_devemu *fi_pde;
79 struct pci_devinst *fi_devi;
89 struct intxinfo si_intpins[4];
90 struct funcinfo si_funcs[MAXFUNCS];
94 uint16_t iobase, iolimit; /* I/O window */
95 uint32_t membase32, memlimit32; /* mmio window below 4GB */
96 uint64_t membase64, memlimit64; /* mmio window above 4GB */
97 struct slotinfo slotinfo[MAXSLOTS];
100 static struct businfo *pci_businfo[MAXBUSES];
102 SET_DECLARE(pci_devemu_set, struct pci_devemu);
104 static uint64_t pci_emul_iobase;
105 static uint8_t *pci_emul_rombase;
106 static uint64_t pci_emul_romoffset;
107 static uint8_t *pci_emul_romlim;
108 static uint64_t pci_emul_membase32;
109 static uint64_t pci_emul_membase64;
110 static uint64_t pci_emul_memlim64;
112 struct pci_bar_allocation {
113 TAILQ_ENTRY(pci_bar_allocation) chain;
114 struct pci_devinst *pdi;
116 enum pcibar_type type;
120 static TAILQ_HEAD(pci_bar_list, pci_bar_allocation) pci_bars =
121 TAILQ_HEAD_INITIALIZER(pci_bars);
123 #define PCI_EMUL_IOBASE 0x2000
124 #define PCI_EMUL_IOLIMIT 0x10000
126 #define PCI_EMUL_ROMSIZE 0x10000000
128 #define PCI_EMUL_ECFG_BASE 0xE0000000 /* 3.5GB */
129 #define PCI_EMUL_ECFG_SIZE (MAXBUSES * 1024 * 1024) /* 1MB per bus */
130 SYSRES_MEM(PCI_EMUL_ECFG_BASE, PCI_EMUL_ECFG_SIZE);
133 * OVMF always uses 0xC0000000 as base address for 32 bit PCI MMIO. Don't
134 * change this address without changing it in OVMF.
136 #define PCI_EMUL_MEMBASE32 0xC0000000
137 #define PCI_EMUL_MEMLIMIT32 PCI_EMUL_ECFG_BASE
138 #define PCI_EMUL_MEMSIZE64 (32*GB)
140 static struct pci_devemu *pci_emul_finddev(const char *name);
141 static void pci_lintr_route(struct pci_devinst *pi);
142 static void pci_lintr_update(struct pci_devinst *pi);
143 static void pci_cfgrw(struct vmctx *ctx, int vcpu, int in, int bus, int slot,
144 int func, int coff, int bytes, uint32_t *val);
147 CFGWRITE(struct pci_devinst *pi, int coff, uint32_t val, int bytes)
151 pci_set_cfgdata8(pi, coff, val);
153 pci_set_cfgdata16(pi, coff, val);
155 pci_set_cfgdata32(pi, coff, val);
158 static __inline uint32_t
159 CFGREAD(struct pci_devinst *pi, int coff, int bytes)
163 return (pci_get_cfgdata8(pi, coff));
165 return (pci_get_cfgdata16(pi, coff));
167 return (pci_get_cfgdata32(pi, coff));
171 is_pcir_bar(int coff)
173 return (coff >= PCIR_BAR(0) && coff < PCIR_BAR(PCI_BARMAX + 1));
177 is_pcir_bios(int coff)
179 return (coff >= PCIR_BIOS && coff < PCIR_BIOS + 4);
187 * Slot options are in the form:
189 * <bus>:<slot>:<func>,<emul>[,<config>]
190 * <slot>[:<func>],<emul>[,<config>]
194 * emul is a string describing the type of PCI device e.g. virtio-net
195 * config is an optional string, depending on the device, that can be
196 * used for configuration.
202 pci_parse_slot_usage(char *aopt)
205 EPRINTLN("Invalid PCI slot info field \"%s\"", aopt);
209 * Helper function to parse a list of comma-separated options where
210 * each option is formatted as "name[=value]". If no value is
211 * provided, the option is treated as a boolean and is given a value
215 pci_parse_legacy_config(nvlist_t *nvl, const char *opt)
217 char *config, *name, *tofree, *value;
222 config = tofree = strdup(opt);
223 while ((name = strsep(&config, ",")) != NULL) {
224 value = strchr(name, '=');
228 set_config_value_node(nvl, name, value);
230 set_config_bool_node(nvl, name, true);
237 * PCI device configuration is stored in MIBs that encode the device's
240 * pci.<bus>.<slot>.<func>
242 * Where "bus", "slot", and "func" are all decimal values without
243 * leading zeroes. Each valid device must have a "device" node which
244 * identifies the driver model of the device.
246 * Device backends can provide a parser for the "config" string. If
247 * a custom parser is not provided, pci_parse_legacy_config() is used
248 * to parse the string.
251 pci_parse_slot(char *opt)
253 char node_name[sizeof("pci.XXX.XX.X")];
254 struct pci_devemu *pde;
255 char *emul, *config, *str, *cp;
256 int error, bnum, snum, fnum;
262 emul = config = NULL;
263 if ((cp = strchr(str, ',')) != NULL) {
266 if ((cp = strchr(emul, ',')) != NULL) {
271 pci_parse_slot_usage(opt);
275 /* <bus>:<slot>:<func> */
276 if (sscanf(str, "%d:%d:%d", &bnum, &snum, &fnum) != 3) {
279 if (sscanf(str, "%d:%d", &snum, &fnum) != 2) {
282 if (sscanf(str, "%d", &snum) != 1) {
288 if (bnum < 0 || bnum >= MAXBUSES || snum < 0 || snum >= MAXSLOTS ||
289 fnum < 0 || fnum >= MAXFUNCS) {
290 pci_parse_slot_usage(opt);
294 pde = pci_emul_finddev(emul);
296 EPRINTLN("pci slot %d:%d:%d: unknown device \"%s\"", bnum, snum,
301 snprintf(node_name, sizeof(node_name), "pci.%d.%d.%d", bnum, snum,
303 nvl = find_config_node(node_name);
305 EPRINTLN("pci slot %d:%d:%d already occupied!", bnum, snum,
309 nvl = create_config_node(node_name);
310 if (pde->pe_alias != NULL)
311 set_config_value_node(nvl, "device", pde->pe_alias);
313 set_config_value_node(nvl, "device", pde->pe_emu);
315 if (pde->pe_legacy_config != NULL)
316 error = pde->pe_legacy_config(nvl, config);
318 error = pci_parse_legacy_config(nvl, config);
325 pci_print_supported_devices(void)
327 struct pci_devemu **pdpp, *pdp;
329 SET_FOREACH(pdpp, pci_devemu_set) {
331 printf("%s\n", pdp->pe_emu);
336 pci_valid_pba_offset(struct pci_devinst *pi, uint64_t offset)
339 if (offset < pi->pi_msix.pba_offset)
342 if (offset >= pi->pi_msix.pba_offset + pi->pi_msix.pba_size) {
350 pci_emul_msix_twrite(struct pci_devinst *pi, uint64_t offset, int size,
353 int msix_entry_offset;
357 /* support only 4 or 8 byte writes */
358 if (size != 4 && size != 8)
362 * Return if table index is beyond what device supports
364 tab_index = offset / MSIX_TABLE_ENTRY_SIZE;
365 if (tab_index >= pi->pi_msix.table_count)
368 msix_entry_offset = offset % MSIX_TABLE_ENTRY_SIZE;
370 /* support only aligned writes */
371 if ((msix_entry_offset % size) != 0)
374 dest = (char *)(pi->pi_msix.table + tab_index);
375 dest += msix_entry_offset;
378 *((uint32_t *)dest) = value;
380 *((uint64_t *)dest) = value;
386 pci_emul_msix_tread(struct pci_devinst *pi, uint64_t offset, int size)
389 int msix_entry_offset;
391 uint64_t retval = ~0;
394 * The PCI standard only allows 4 and 8 byte accesses to the MSI-X
395 * table but we also allow 1 byte access to accommodate reads from
398 if (size != 1 && size != 4 && size != 8)
401 msix_entry_offset = offset % MSIX_TABLE_ENTRY_SIZE;
403 /* support only aligned reads */
404 if ((msix_entry_offset % size) != 0) {
408 tab_index = offset / MSIX_TABLE_ENTRY_SIZE;
410 if (tab_index < pi->pi_msix.table_count) {
411 /* valid MSI-X Table access */
412 dest = (char *)(pi->pi_msix.table + tab_index);
413 dest += msix_entry_offset;
416 retval = *((uint8_t *)dest);
418 retval = *((uint32_t *)dest);
420 retval = *((uint64_t *)dest);
421 } else if (pci_valid_pba_offset(pi, offset)) {
422 /* return 0 for PBA access */
430 pci_msix_table_bar(struct pci_devinst *pi)
433 if (pi->pi_msix.table != NULL)
434 return (pi->pi_msix.table_bar);
440 pci_msix_pba_bar(struct pci_devinst *pi)
443 if (pi->pi_msix.table != NULL)
444 return (pi->pi_msix.pba_bar);
450 pci_emul_io_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
451 uint32_t *eax, void *arg)
453 struct pci_devinst *pdi = arg;
454 struct pci_devemu *pe = pdi->pi_d;
460 for (i = 0; i <= PCI_BARMAX; i++) {
461 if (pdi->pi_bar[i].type == PCIBAR_IO &&
462 (uint64_t)port >= pdi->pi_bar[i].addr &&
463 (uint64_t)port + bytes <=
464 pdi->pi_bar[i].addr + pdi->pi_bar[i].size) {
465 offset = port - pdi->pi_bar[i].addr;
467 *eax = (*pe->pe_barread)(ctx, vcpu, pdi, i,
470 (*pe->pe_barwrite)(ctx, vcpu, pdi, i, offset,
479 pci_emul_mem_handler(struct vmctx *ctx, int vcpu, int dir, uint64_t addr,
480 int size, uint64_t *val, void *arg1, long arg2)
482 struct pci_devinst *pdi = arg1;
483 struct pci_devemu *pe = pdi->pi_d;
485 int bidx = (int) arg2;
487 assert(bidx <= PCI_BARMAX);
488 assert(pdi->pi_bar[bidx].type == PCIBAR_MEM32 ||
489 pdi->pi_bar[bidx].type == PCIBAR_MEM64);
490 assert(addr >= pdi->pi_bar[bidx].addr &&
491 addr + size <= pdi->pi_bar[bidx].addr + pdi->pi_bar[bidx].size);
493 offset = addr - pdi->pi_bar[bidx].addr;
495 if (dir == MEM_F_WRITE) {
497 (*pe->pe_barwrite)(ctx, vcpu, pdi, bidx, offset,
498 4, *val & 0xffffffff);
499 (*pe->pe_barwrite)(ctx, vcpu, pdi, bidx, offset + 4,
502 (*pe->pe_barwrite)(ctx, vcpu, pdi, bidx, offset,
507 *val = (*pe->pe_barread)(ctx, vcpu, pdi, bidx,
509 *val |= (*pe->pe_barread)(ctx, vcpu, pdi, bidx,
510 offset + 4, 4) << 32;
512 *val = (*pe->pe_barread)(ctx, vcpu, pdi, bidx,
522 pci_emul_alloc_resource(uint64_t *baseptr, uint64_t limit, uint64_t size,
527 assert((size & (size - 1)) == 0); /* must be a power of 2 */
529 base = roundup2(*baseptr, size);
531 if (base + size <= limit) {
533 *baseptr = base + size;
540 * Register (or unregister) the MMIO or I/O region associated with the BAR
541 * register 'idx' of an emulated pci device.
544 modify_bar_registration(struct pci_devinst *pi, int idx, int registration)
546 struct pci_devemu *pe;
548 struct inout_port iop;
552 switch (pi->pi_bar[idx].type) {
554 bzero(&iop, sizeof(struct inout_port));
555 iop.name = pi->pi_name;
556 iop.port = pi->pi_bar[idx].addr;
557 iop.size = pi->pi_bar[idx].size;
559 iop.flags = IOPORT_F_INOUT;
560 iop.handler = pci_emul_io_handler;
562 error = register_inout(&iop);
564 error = unregister_inout(&iop);
565 if (pe->pe_baraddr != NULL)
566 (*pe->pe_baraddr)(pi->pi_vmctx, pi, idx, registration,
567 pi->pi_bar[idx].addr);
571 bzero(&mr, sizeof(struct mem_range));
572 mr.name = pi->pi_name;
573 mr.base = pi->pi_bar[idx].addr;
574 mr.size = pi->pi_bar[idx].size;
577 mr.handler = pci_emul_mem_handler;
580 error = register_mem(&mr);
582 error = unregister_mem(&mr);
583 if (pe->pe_baraddr != NULL)
584 (*pe->pe_baraddr)(pi->pi_vmctx, pi, idx, registration,
585 pi->pi_bar[idx].addr);
589 if (pe->pe_baraddr != NULL)
590 (*pe->pe_baraddr)(pi->pi_vmctx, pi, idx, registration,
591 pi->pi_bar[idx].addr);
601 unregister_bar(struct pci_devinst *pi, int idx)
604 modify_bar_registration(pi, idx, 0);
608 register_bar(struct pci_devinst *pi, int idx)
611 modify_bar_registration(pi, idx, 1);
614 /* Is the ROM enabled for the emulated pci device? */
616 romen(struct pci_devinst *pi)
618 return (pi->pi_bar[PCI_ROM_IDX].lobits & PCIM_BIOS_ENABLE) ==
622 /* Are we decoding i/o port accesses for the emulated pci device? */
624 porten(struct pci_devinst *pi)
628 cmd = pci_get_cfgdata16(pi, PCIR_COMMAND);
630 return (cmd & PCIM_CMD_PORTEN);
633 /* Are we decoding memory accesses for the emulated pci device? */
635 memen(struct pci_devinst *pi)
639 cmd = pci_get_cfgdata16(pi, PCIR_COMMAND);
641 return (cmd & PCIM_CMD_MEMEN);
645 * Update the MMIO or I/O address that is decoded by the BAR register.
647 * If the pci device has enabled the address space decoding then intercept
648 * the address range decoded by the BAR register.
651 update_bar_address(struct pci_devinst *pi, uint64_t addr, int idx, int type)
655 if (pi->pi_bar[idx].type == PCIBAR_IO)
661 unregister_bar(pi, idx);
666 pi->pi_bar[idx].addr = addr;
669 pi->pi_bar[idx].addr &= ~0xffffffffUL;
670 pi->pi_bar[idx].addr |= addr;
673 pi->pi_bar[idx].addr &= 0xffffffff;
674 pi->pi_bar[idx].addr |= addr;
681 register_bar(pi, idx);
685 pci_emul_alloc_bar(struct pci_devinst *pdi, int idx, enum pcibar_type type,
688 assert((type == PCIBAR_ROM) || (idx >= 0 && idx <= PCI_BARMAX));
689 assert((type != PCIBAR_ROM) || (idx == PCI_ROM_IDX));
691 if ((size & (size - 1)) != 0)
692 size = 1UL << flsl(size); /* round up to a power of 2 */
694 /* Enforce minimum BAR sizes required by the PCI standard */
695 if (type == PCIBAR_IO) {
698 } else if (type == PCIBAR_ROM) {
699 if (size < ~PCIM_BIOS_ADDR_MASK + 1)
700 size = ~PCIM_BIOS_ADDR_MASK + 1;
707 * To reduce fragmentation of the MMIO space, we allocate the BARs by
708 * size. Therefore, don't allocate the BAR yet. We create a list of all
709 * BAR allocation which is sorted by BAR size. When all PCI devices are
710 * initialized, we will assign an address to the BARs.
713 /* create a new list entry */
714 struct pci_bar_allocation *const new_bar = malloc(sizeof(*new_bar));
715 memset(new_bar, 0, sizeof(*new_bar));
718 new_bar->type = type;
719 new_bar->size = size;
722 * Search for a BAR which size is lower than the size of our newly
725 struct pci_bar_allocation *bar = NULL;
726 TAILQ_FOREACH(bar, &pci_bars, chain) {
727 if (bar->size < size) {
734 * Either the list is empty or new BAR is the smallest BAR of
735 * the list. Append it to the end of our list.
737 TAILQ_INSERT_TAIL(&pci_bars, new_bar, chain);
740 * The found BAR is smaller than our new BAR. For that reason,
741 * insert our new BAR before the found BAR.
743 TAILQ_INSERT_BEFORE(bar, new_bar, chain);
747 * pci_passthru devices synchronize their physical and virtual command
748 * register on init. For that reason, the virtual cmd reg should be
749 * updated as early as possible.
754 enbit = PCIM_CMD_PORTEN;
758 enbit = PCIM_CMD_MEMEN;
765 const uint16_t cmd = pci_get_cfgdata16(pdi, PCIR_COMMAND);
766 pci_set_cfgdata16(pdi, PCIR_COMMAND, cmd | enbit);
772 pci_emul_assign_bar(struct pci_devinst *const pdi, const int idx,
773 const enum pcibar_type type, const uint64_t size)
776 uint64_t *baseptr, limit, addr, mask, lobits, bar;
781 addr = mask = lobits = 0;
784 baseptr = &pci_emul_iobase;
785 limit = PCI_EMUL_IOLIMIT;
786 mask = PCIM_BAR_IO_BASE;
787 lobits = PCIM_BAR_IO_SPACE;
792 * Some drivers do not work well if the 64-bit BAR is allocated
793 * above 4GB. Allow for this by allocating small requests under
794 * 4GB unless then allocation size is larger than some arbitrary
795 * number (128MB currently).
797 if (size > 128 * 1024 * 1024) {
798 baseptr = &pci_emul_membase64;
799 limit = pci_emul_memlim64;
800 mask = PCIM_BAR_MEM_BASE;
801 lobits = PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_64 |
802 PCIM_BAR_MEM_PREFETCH;
804 baseptr = &pci_emul_membase32;
805 limit = PCI_EMUL_MEMLIMIT32;
806 mask = PCIM_BAR_MEM_BASE;
807 lobits = PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_64;
811 baseptr = &pci_emul_membase32;
812 limit = PCI_EMUL_MEMLIMIT32;
813 mask = PCIM_BAR_MEM_BASE;
814 lobits = PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_32;
817 /* do not claim memory for ROM. OVMF will do it for us. */
820 mask = PCIM_BIOS_ADDR_MASK;
824 printf("pci_emul_alloc_base: invalid bar type %d\n", type);
828 if (baseptr != NULL) {
829 error = pci_emul_alloc_resource(baseptr, limit, size, &addr);
836 pdi->pi_bar[idx].type = type;
837 pdi->pi_bar[idx].addr = addr;
838 pdi->pi_bar[idx].size = size;
840 * passthru devices are using same lobits as physical device they set
843 if (pdi->pi_bar[idx].lobits != 0) {
844 lobits = pdi->pi_bar[idx].lobits;
846 pdi->pi_bar[idx].lobits = lobits;
849 /* Initialize the BAR register in config space */
850 bar = (addr & mask) | lobits;
851 pci_set_cfgdata32(pdi, PCIR_BAR(idx), bar);
853 if (type == PCIBAR_MEM64) {
854 assert(idx + 1 <= PCI_BARMAX);
855 pdi->pi_bar[idx + 1].type = PCIBAR_MEMHI64;
856 pci_set_cfgdata32(pdi, PCIR_BAR(idx + 1), bar >> 32);
859 if (type != PCIBAR_ROM) {
860 register_bar(pdi, idx);
867 pci_emul_alloc_rom(struct pci_devinst *const pdi, const uint64_t size,
870 /* allocate ROM space once on first call */
871 if (pci_emul_rombase == 0) {
872 pci_emul_rombase = vm_create_devmem(pdi->pi_vmctx, VM_PCIROM,
873 "pcirom", PCI_EMUL_ROMSIZE);
874 if (pci_emul_rombase == MAP_FAILED) {
875 warnx("%s: failed to create rom segment", __func__);
878 pci_emul_romlim = pci_emul_rombase + PCI_EMUL_ROMSIZE;
879 pci_emul_romoffset = 0;
882 /* ROM size should be a power of 2 and greater than 2 KB */
883 const uint64_t rom_size = MAX(1UL << flsl(size),
884 ~PCIM_BIOS_ADDR_MASK + 1);
886 /* check if ROM fits into ROM space */
887 if (pci_emul_romoffset + rom_size > PCI_EMUL_ROMSIZE) {
888 warnx("%s: no space left in rom segment:", __func__);
889 warnx("%16lu bytes left",
890 PCI_EMUL_ROMSIZE - pci_emul_romoffset);
891 warnx("%16lu bytes required by %d/%d/%d", rom_size, pdi->pi_bus,
892 pdi->pi_slot, pdi->pi_func);
896 /* allocate ROM BAR */
897 const int error = pci_emul_alloc_bar(pdi, PCI_ROM_IDX, PCIBAR_ROM,
903 *addr = pci_emul_rombase + pci_emul_romoffset;
905 /* save offset into ROM Space */
906 pdi->pi_romoffset = pci_emul_romoffset;
908 /* increase offset for next ROM */
909 pci_emul_romoffset += rom_size;
914 #define CAP_START_OFFSET 0x40
916 pci_emul_add_capability(struct pci_devinst *pi, u_char *capdata, int caplen)
918 int i, capoff, reallen;
923 reallen = roundup2(caplen, 4); /* dword aligned */
925 sts = pci_get_cfgdata16(pi, PCIR_STATUS);
926 if ((sts & PCIM_STATUS_CAPPRESENT) == 0)
927 capoff = CAP_START_OFFSET;
929 capoff = pi->pi_capend + 1;
931 /* Check if we have enough space */
932 if (capoff + reallen > PCI_REGMAX + 1)
935 /* Set the previous capability pointer */
936 if ((sts & PCIM_STATUS_CAPPRESENT) == 0) {
937 pci_set_cfgdata8(pi, PCIR_CAP_PTR, capoff);
938 pci_set_cfgdata16(pi, PCIR_STATUS, sts|PCIM_STATUS_CAPPRESENT);
940 pci_set_cfgdata8(pi, pi->pi_prevcap + 1, capoff);
942 /* Copy the capability */
943 for (i = 0; i < caplen; i++)
944 pci_set_cfgdata8(pi, capoff + i, capdata[i]);
946 /* Set the next capability pointer */
947 pci_set_cfgdata8(pi, capoff + 1, 0);
949 pi->pi_prevcap = capoff;
950 pi->pi_capend = capoff + reallen - 1;
954 static struct pci_devemu *
955 pci_emul_finddev(const char *name)
957 struct pci_devemu **pdpp, *pdp;
959 SET_FOREACH(pdpp, pci_devemu_set) {
961 if (!strcmp(pdp->pe_emu, name)) {
970 pci_emul_init(struct vmctx *ctx, struct pci_devemu *pde, int bus, int slot,
971 int func, struct funcinfo *fi)
973 struct pci_devinst *pdi;
976 pdi = calloc(1, sizeof(struct pci_devinst));
982 pthread_mutex_init(&pdi->pi_lintr.lock, NULL);
983 pdi->pi_lintr.pin = 0;
984 pdi->pi_lintr.state = IDLE;
985 pdi->pi_lintr.pirq_pin = 0;
986 pdi->pi_lintr.ioapic_irq = 0;
988 snprintf(pdi->pi_name, PI_NAMESZ, "%s-pci-%d", pde->pe_emu, slot);
990 /* Disable legacy interrupts */
991 pci_set_cfgdata8(pdi, PCIR_INTLINE, 255);
992 pci_set_cfgdata8(pdi, PCIR_INTPIN, 0);
994 pci_set_cfgdata8(pdi, PCIR_COMMAND, PCIM_CMD_BUSMASTEREN);
996 err = (*pde->pe_init)(ctx, pdi, fi->fi_config);
1006 pci_populate_msicap(struct msicap *msicap, int msgnum, int nextptr)
1010 /* Number of msi messages must be a power of 2 between 1 and 32 */
1011 assert((msgnum & (msgnum - 1)) == 0 && msgnum >= 1 && msgnum <= 32);
1012 mmc = ffs(msgnum) - 1;
1014 bzero(msicap, sizeof(struct msicap));
1015 msicap->capid = PCIY_MSI;
1016 msicap->nextptr = nextptr;
1017 msicap->msgctrl = PCIM_MSICTRL_64BIT | (mmc << 1);
1021 pci_emul_add_msicap(struct pci_devinst *pi, int msgnum)
1023 struct msicap msicap;
1025 pci_populate_msicap(&msicap, msgnum, 0);
1027 return (pci_emul_add_capability(pi, (u_char *)&msicap, sizeof(msicap)));
1031 pci_populate_msixcap(struct msixcap *msixcap, int msgnum, int barnum,
1032 uint32_t msix_tab_size)
1035 assert(msix_tab_size % 4096 == 0);
1037 bzero(msixcap, sizeof(struct msixcap));
1038 msixcap->capid = PCIY_MSIX;
1041 * Message Control Register, all fields set to
1042 * zero except for the Table Size.
1043 * Note: Table size N is encoded as N-1
1045 msixcap->msgctrl = msgnum - 1;
1049 * - MSI-X table start at offset 0
1050 * - PBA table starts at a 4K aligned offset after the MSI-X table
1052 msixcap->table_info = barnum & PCIM_MSIX_BIR_MASK;
1053 msixcap->pba_info = msix_tab_size | (barnum & PCIM_MSIX_BIR_MASK);
1057 pci_msix_table_init(struct pci_devinst *pi, int table_entries)
1061 assert(table_entries > 0);
1062 assert(table_entries <= MAX_MSIX_TABLE_ENTRIES);
1064 table_size = table_entries * MSIX_TABLE_ENTRY_SIZE;
1065 pi->pi_msix.table = calloc(1, table_size);
1067 /* set mask bit of vector control register */
1068 for (i = 0; i < table_entries; i++)
1069 pi->pi_msix.table[i].vector_control |= PCIM_MSIX_VCTRL_MASK;
1073 pci_emul_add_msixcap(struct pci_devinst *pi, int msgnum, int barnum)
1076 struct msixcap msixcap;
1078 assert(msgnum >= 1 && msgnum <= MAX_MSIX_TABLE_ENTRIES);
1079 assert(barnum >= 0 && barnum <= PCIR_MAX_BAR_0);
1081 tab_size = msgnum * MSIX_TABLE_ENTRY_SIZE;
1083 /* Align table size to nearest 4K */
1084 tab_size = roundup2(tab_size, 4096);
1086 pi->pi_msix.table_bar = barnum;
1087 pi->pi_msix.pba_bar = barnum;
1088 pi->pi_msix.table_offset = 0;
1089 pi->pi_msix.table_count = msgnum;
1090 pi->pi_msix.pba_offset = tab_size;
1091 pi->pi_msix.pba_size = PBA_SIZE(msgnum);
1093 pci_msix_table_init(pi, msgnum);
1095 pci_populate_msixcap(&msixcap, msgnum, barnum, tab_size);
1097 /* allocate memory for MSI-X Table and PBA */
1098 pci_emul_alloc_bar(pi, barnum, PCIBAR_MEM32,
1099 tab_size + pi->pi_msix.pba_size);
1101 return (pci_emul_add_capability(pi, (u_char *)&msixcap,
1106 msixcap_cfgwrite(struct pci_devinst *pi, int capoff, int offset,
1107 int bytes, uint32_t val)
1109 uint16_t msgctrl, rwmask;
1112 off = offset - capoff;
1113 /* Message Control Register */
1114 if (off == 2 && bytes == 2) {
1115 rwmask = PCIM_MSIXCTRL_MSIX_ENABLE | PCIM_MSIXCTRL_FUNCTION_MASK;
1116 msgctrl = pci_get_cfgdata16(pi, offset);
1118 msgctrl |= val & rwmask;
1121 pi->pi_msix.enabled = val & PCIM_MSIXCTRL_MSIX_ENABLE;
1122 pi->pi_msix.function_mask = val & PCIM_MSIXCTRL_FUNCTION_MASK;
1123 pci_lintr_update(pi);
1126 CFGWRITE(pi, offset, val, bytes);
1130 msicap_cfgwrite(struct pci_devinst *pi, int capoff, int offset,
1131 int bytes, uint32_t val)
1133 uint16_t msgctrl, rwmask, msgdata, mme;
1137 * If guest is writing to the message control register make sure
1138 * we do not overwrite read-only fields.
1140 if ((offset - capoff) == 2 && bytes == 2) {
1141 rwmask = PCIM_MSICTRL_MME_MASK | PCIM_MSICTRL_MSI_ENABLE;
1142 msgctrl = pci_get_cfgdata16(pi, offset);
1144 msgctrl |= val & rwmask;
1147 CFGWRITE(pi, offset, val, bytes);
1149 msgctrl = pci_get_cfgdata16(pi, capoff + 2);
1150 addrlo = pci_get_cfgdata32(pi, capoff + 4);
1151 if (msgctrl & PCIM_MSICTRL_64BIT)
1152 msgdata = pci_get_cfgdata16(pi, capoff + 12);
1154 msgdata = pci_get_cfgdata16(pi, capoff + 8);
1156 mme = msgctrl & PCIM_MSICTRL_MME_MASK;
1157 pi->pi_msi.enabled = msgctrl & PCIM_MSICTRL_MSI_ENABLE ? 1 : 0;
1158 if (pi->pi_msi.enabled) {
1159 pi->pi_msi.addr = addrlo;
1160 pi->pi_msi.msg_data = msgdata;
1161 pi->pi_msi.maxmsgnum = 1 << (mme >> 4);
1163 pi->pi_msi.maxmsgnum = 0;
1165 pci_lintr_update(pi);
1169 pciecap_cfgwrite(struct pci_devinst *pi, int capoff __unused, int offset,
1170 int bytes, uint32_t val)
1173 /* XXX don't write to the readonly parts */
1174 CFGWRITE(pi, offset, val, bytes);
1177 #define PCIECAP_VERSION 0x2
1179 pci_emul_add_pciecap(struct pci_devinst *pi, int type)
1182 struct pciecap pciecap;
1184 bzero(&pciecap, sizeof(pciecap));
1187 * Use the integrated endpoint type for endpoints on a root complex bus.
1189 * NB: bhyve currently only supports a single PCI bus that is the root
1190 * complex bus, so all endpoints are integrated.
1192 if ((type == PCIEM_TYPE_ENDPOINT) && (pi->pi_bus == 0))
1193 type = PCIEM_TYPE_ROOT_INT_EP;
1195 pciecap.capid = PCIY_EXPRESS;
1196 pciecap.pcie_capabilities = PCIECAP_VERSION | type;
1197 if (type != PCIEM_TYPE_ROOT_INT_EP) {
1198 pciecap.link_capabilities = 0x411; /* gen1, x1 */
1199 pciecap.link_status = 0x11; /* gen1, x1 */
1202 err = pci_emul_add_capability(pi, (u_char *)&pciecap, sizeof(pciecap));
1207 * This function assumes that 'coff' is in the capabilities region of the
1208 * config space. A capoff parameter of zero will force a search for the
1212 pci_emul_capwrite(struct pci_devinst *pi, int offset, int bytes, uint32_t val,
1213 uint8_t capoff, int capid)
1217 /* Do not allow un-aligned writes */
1218 if ((offset & (bytes - 1)) != 0)
1222 /* Find the capability that we want to update */
1223 capoff = CAP_START_OFFSET;
1225 nextoff = pci_get_cfgdata8(pi, capoff + 1);
1228 if (offset >= capoff && offset < nextoff)
1233 assert(offset >= capoff);
1234 capid = pci_get_cfgdata8(pi, capoff);
1238 * Capability ID and Next Capability Pointer are readonly.
1239 * However, some o/s's do 4-byte writes that include these.
1240 * For this case, trim the write back to 2 bytes and adjust
1243 if (offset == capoff || offset == capoff + 1) {
1244 if (offset == capoff && bytes == 4) {
1254 msicap_cfgwrite(pi, capoff, offset, bytes, val);
1257 msixcap_cfgwrite(pi, capoff, offset, bytes, val);
1260 pciecap_cfgwrite(pi, capoff, offset, bytes, val);
1268 pci_emul_iscap(struct pci_devinst *pi, int offset)
1272 sts = pci_get_cfgdata16(pi, PCIR_STATUS);
1273 if ((sts & PCIM_STATUS_CAPPRESENT) != 0) {
1274 if (offset >= CAP_START_OFFSET && offset <= pi->pi_capend)
1281 pci_emul_fallback_handler(struct vmctx *ctx __unused, int vcpu __unused,
1282 int dir, uint64_t addr __unused, int size __unused, uint64_t *val,
1283 void *arg1 __unused, long arg2 __unused)
1286 * Ignore writes; return 0xff's for reads. The mem read code
1287 * will take care of truncating to the correct size.
1289 if (dir == MEM_F_READ) {
1290 *val = 0xffffffffffffffff;
1297 pci_emul_ecfg_handler(struct vmctx *ctx, int vcpu, int dir, uint64_t addr,
1298 int bytes, uint64_t *val, void *arg1 __unused, long arg2 __unused)
1300 int bus, slot, func, coff, in;
1302 coff = addr & 0xfff;
1303 func = (addr >> 12) & 0x7;
1304 slot = (addr >> 15) & 0x1f;
1305 bus = (addr >> 20) & 0xff;
1306 in = (dir == MEM_F_READ);
1309 pci_cfgrw(ctx, vcpu, in, bus, slot, func, coff, bytes, (uint32_t *)val);
1317 return (PCI_EMUL_ECFG_BASE);
1320 #define BUSIO_ROUNDUP 32
1321 #define BUSMEM32_ROUNDUP (1024 * 1024)
1322 #define BUSMEM64_ROUNDUP (512 * 1024 * 1024)
1325 init_pci(struct vmctx *ctx)
1327 char node_name[sizeof("pci.XXX.XX.X")];
1328 struct mem_range mr;
1329 struct pci_devemu *pde;
1331 struct slotinfo *si;
1332 struct funcinfo *fi;
1336 int bus, slot, func;
1339 if (vm_get_lowmem_limit(ctx) > PCI_EMUL_MEMBASE32)
1340 errx(EX_OSERR, "Invalid lowmem limit");
1342 pci_emul_iobase = PCI_EMUL_IOBASE;
1343 pci_emul_membase32 = PCI_EMUL_MEMBASE32;
1345 pci_emul_membase64 = 4*GB + vm_get_highmem_size(ctx);
1346 pci_emul_membase64 = roundup2(pci_emul_membase64, PCI_EMUL_MEMSIZE64);
1347 pci_emul_memlim64 = pci_emul_membase64 + PCI_EMUL_MEMSIZE64;
1349 for (bus = 0; bus < MAXBUSES; bus++) {
1350 snprintf(node_name, sizeof(node_name), "pci.%d", bus);
1351 nvl = find_config_node(node_name);
1354 pci_businfo[bus] = calloc(1, sizeof(struct businfo));
1355 bi = pci_businfo[bus];
1358 * Keep track of the i/o and memory resources allocated to
1361 bi->iobase = pci_emul_iobase;
1362 bi->membase32 = pci_emul_membase32;
1363 bi->membase64 = pci_emul_membase64;
1365 /* first run: init devices */
1366 for (slot = 0; slot < MAXSLOTS; slot++) {
1367 si = &bi->slotinfo[slot];
1368 for (func = 0; func < MAXFUNCS; func++) {
1369 fi = &si->si_funcs[func];
1370 snprintf(node_name, sizeof(node_name),
1371 "pci.%d.%d.%d", bus, slot, func);
1372 nvl = find_config_node(node_name);
1376 fi->fi_config = nvl;
1377 emul = get_config_value_node(nvl, "device");
1379 EPRINTLN("pci slot %d:%d:%d: missing "
1380 "\"device\" value", bus, slot, func);
1383 pde = pci_emul_finddev(emul);
1385 EPRINTLN("pci slot %d:%d:%d: unknown "
1386 "device \"%s\"", bus, slot, func,
1390 if (pde->pe_alias != NULL) {
1391 EPRINTLN("pci slot %d:%d:%d: legacy "
1392 "device \"%s\", use \"%s\" instead",
1393 bus, slot, func, emul,
1398 error = pci_emul_init(ctx, pde, bus, slot,
1405 /* second run: assign BARs and free list */
1406 struct pci_bar_allocation *bar;
1407 struct pci_bar_allocation *bar_tmp;
1408 TAILQ_FOREACH_SAFE(bar, &pci_bars, chain, bar_tmp) {
1409 pci_emul_assign_bar(bar->pdi, bar->idx, bar->type,
1413 TAILQ_INIT(&pci_bars);
1416 * Add some slop to the I/O and memory resources decoded by
1417 * this bus to give a guest some flexibility if it wants to
1418 * reprogram the BARs.
1420 pci_emul_iobase += BUSIO_ROUNDUP;
1421 pci_emul_iobase = roundup2(pci_emul_iobase, BUSIO_ROUNDUP);
1422 bi->iolimit = pci_emul_iobase;
1424 pci_emul_membase32 += BUSMEM32_ROUNDUP;
1425 pci_emul_membase32 = roundup2(pci_emul_membase32,
1427 bi->memlimit32 = pci_emul_membase32;
1429 pci_emul_membase64 += BUSMEM64_ROUNDUP;
1430 pci_emul_membase64 = roundup2(pci_emul_membase64,
1432 bi->memlimit64 = pci_emul_membase64;
1436 * PCI backends are initialized before routing INTx interrupts
1437 * so that LPC devices are able to reserve ISA IRQs before
1438 * routing PIRQ pins.
1440 for (bus = 0; bus < MAXBUSES; bus++) {
1441 if ((bi = pci_businfo[bus]) == NULL)
1444 for (slot = 0; slot < MAXSLOTS; slot++) {
1445 si = &bi->slotinfo[slot];
1446 for (func = 0; func < MAXFUNCS; func++) {
1447 fi = &si->si_funcs[func];
1448 if (fi->fi_devi == NULL)
1450 pci_lintr_route(fi->fi_devi);
1457 * The guest physical memory map looks like the following:
1458 * [0, lowmem) guest system memory
1459 * [lowmem, 0xC0000000) memory hole (may be absent)
1460 * [0xC0000000, 0xE0000000) PCI hole (32-bit BAR allocation)
1461 * [0xE0000000, 0xF0000000) PCI extended config window
1462 * [0xF0000000, 4GB) LAPIC, IOAPIC, HPET, firmware
1463 * [4GB, 4GB + highmem)
1467 * Accesses to memory addresses that are not allocated to system
1468 * memory or PCI devices return 0xff's.
1470 lowmem = vm_get_lowmem_size(ctx);
1471 bzero(&mr, sizeof(struct mem_range));
1472 mr.name = "PCI hole";
1473 mr.flags = MEM_F_RW | MEM_F_IMMUTABLE;
1475 mr.size = (4ULL * 1024 * 1024 * 1024) - lowmem;
1476 mr.handler = pci_emul_fallback_handler;
1477 error = register_mem_fallback(&mr);
1480 /* PCI extended config space */
1481 bzero(&mr, sizeof(struct mem_range));
1482 mr.name = "PCI ECFG";
1483 mr.flags = MEM_F_RW | MEM_F_IMMUTABLE;
1484 mr.base = PCI_EMUL_ECFG_BASE;
1485 mr.size = PCI_EMUL_ECFG_SIZE;
1486 mr.handler = pci_emul_ecfg_handler;
1487 error = register_mem(&mr);
1494 pci_apic_prt_entry(int bus __unused, int slot, int pin, int pirq_pin __unused,
1495 int ioapic_irq, void *arg __unused)
1498 dsdt_line(" Package ()");
1500 dsdt_line(" 0x%X,", slot << 16 | 0xffff);
1501 dsdt_line(" 0x%02X,", pin - 1);
1502 dsdt_line(" Zero,");
1503 dsdt_line(" 0x%X", ioapic_irq);
1508 pci_pirq_prt_entry(int bus __unused, int slot, int pin, int pirq_pin,
1509 int ioapic_irq __unused, void *arg __unused)
1513 name = lpc_pirq_name(pirq_pin);
1516 dsdt_line(" Package ()");
1518 dsdt_line(" 0x%X,", slot << 16 | 0xffff);
1519 dsdt_line(" 0x%02X,", pin - 1);
1520 dsdt_line(" %s,", name);
1527 * A bhyve virtual machine has a flat PCI hierarchy with a root port
1528 * corresponding to each PCI bus.
1531 pci_bus_write_dsdt(int bus)
1534 struct slotinfo *si;
1535 struct pci_devinst *pi;
1536 int count, func, slot;
1539 * If there are no devices on this 'bus' then just return.
1541 if ((bi = pci_businfo[bus]) == NULL) {
1543 * Bus 0 is special because it decodes the I/O ports used
1544 * for PCI config space access even if there are no devices
1551 dsdt_line(" Device (PC%02X)", bus);
1553 dsdt_line(" Name (_HID, EisaId (\"PNP0A03\"))");
1555 dsdt_line(" Method (_BBN, 0, NotSerialized)");
1557 dsdt_line(" Return (0x%08X)", bus);
1559 dsdt_line(" Name (_CRS, ResourceTemplate ()");
1561 dsdt_line(" WordBusNumber (ResourceProducer, MinFixed, "
1562 "MaxFixed, PosDecode,");
1563 dsdt_line(" 0x0000, // Granularity");
1564 dsdt_line(" 0x%04X, // Range Minimum", bus);
1565 dsdt_line(" 0x%04X, // Range Maximum", bus);
1566 dsdt_line(" 0x0000, // Translation Offset");
1567 dsdt_line(" 0x0001, // Length");
1572 dsdt_fixed_ioport(0xCF8, 8);
1575 dsdt_line(" WordIO (ResourceProducer, MinFixed, MaxFixed, "
1576 "PosDecode, EntireRange,");
1577 dsdt_line(" 0x0000, // Granularity");
1578 dsdt_line(" 0x0000, // Range Minimum");
1579 dsdt_line(" 0x0CF7, // Range Maximum");
1580 dsdt_line(" 0x0000, // Translation Offset");
1581 dsdt_line(" 0x0CF8, // Length");
1582 dsdt_line(" ,, , TypeStatic)");
1584 dsdt_line(" WordIO (ResourceProducer, MinFixed, MaxFixed, "
1585 "PosDecode, EntireRange,");
1586 dsdt_line(" 0x0000, // Granularity");
1587 dsdt_line(" 0x0D00, // Range Minimum");
1588 dsdt_line(" 0x%04X, // Range Maximum",
1589 PCI_EMUL_IOBASE - 1);
1590 dsdt_line(" 0x0000, // Translation Offset");
1591 dsdt_line(" 0x%04X, // Length",
1592 PCI_EMUL_IOBASE - 0x0D00);
1593 dsdt_line(" ,, , TypeStatic)");
1603 dsdt_line(" WordIO (ResourceProducer, MinFixed, MaxFixed, "
1604 "PosDecode, EntireRange,");
1605 dsdt_line(" 0x0000, // Granularity");
1606 dsdt_line(" 0x%04X, // Range Minimum", bi->iobase);
1607 dsdt_line(" 0x%04X, // Range Maximum",
1609 dsdt_line(" 0x0000, // Translation Offset");
1610 dsdt_line(" 0x%04X, // Length",
1611 bi->iolimit - bi->iobase);
1612 dsdt_line(" ,, , TypeStatic)");
1614 /* mmio window (32-bit) */
1615 dsdt_line(" DWordMemory (ResourceProducer, PosDecode, "
1616 "MinFixed, MaxFixed, NonCacheable, ReadWrite,");
1617 dsdt_line(" 0x00000000, // Granularity");
1618 dsdt_line(" 0x%08X, // Range Minimum\n", bi->membase32);
1619 dsdt_line(" 0x%08X, // Range Maximum\n",
1620 bi->memlimit32 - 1);
1621 dsdt_line(" 0x00000000, // Translation Offset");
1622 dsdt_line(" 0x%08X, // Length\n",
1623 bi->memlimit32 - bi->membase32);
1624 dsdt_line(" ,, , AddressRangeMemory, TypeStatic)");
1626 /* mmio window (64-bit) */
1627 dsdt_line(" QWordMemory (ResourceProducer, PosDecode, "
1628 "MinFixed, MaxFixed, NonCacheable, ReadWrite,");
1629 dsdt_line(" 0x0000000000000000, // Granularity");
1630 dsdt_line(" 0x%016lX, // Range Minimum\n", bi->membase64);
1631 dsdt_line(" 0x%016lX, // Range Maximum\n",
1632 bi->memlimit64 - 1);
1633 dsdt_line(" 0x0000000000000000, // Translation Offset");
1634 dsdt_line(" 0x%016lX, // Length\n",
1635 bi->memlimit64 - bi->membase64);
1636 dsdt_line(" ,, , AddressRangeMemory, TypeStatic)");
1639 count = pci_count_lintr(bus);
1642 dsdt_line("Name (PPRT, Package ()");
1644 pci_walk_lintr(bus, pci_pirq_prt_entry, NULL);
1646 dsdt_line("Name (APRT, Package ()");
1648 pci_walk_lintr(bus, pci_apic_prt_entry, NULL);
1650 dsdt_line("Method (_PRT, 0, NotSerialized)");
1652 dsdt_line(" If (PICM)");
1654 dsdt_line(" Return (APRT)");
1658 dsdt_line(" Return (PPRT)");
1665 for (slot = 0; slot < MAXSLOTS; slot++) {
1666 si = &bi->slotinfo[slot];
1667 for (func = 0; func < MAXFUNCS; func++) {
1668 pi = si->si_funcs[func].fi_devi;
1669 if (pi != NULL && pi->pi_d->pe_write_dsdt != NULL)
1670 pi->pi_d->pe_write_dsdt(pi);
1679 pci_write_dsdt(void)
1684 dsdt_line("Name (PICM, 0x00)");
1685 dsdt_line("Method (_PIC, 1, NotSerialized)");
1687 dsdt_line(" Store (Arg0, PICM)");
1690 dsdt_line("Scope (_SB)");
1692 for (bus = 0; bus < MAXBUSES; bus++)
1693 pci_bus_write_dsdt(bus);
1699 pci_bus_configured(int bus)
1701 assert(bus >= 0 && bus < MAXBUSES);
1702 return (pci_businfo[bus] != NULL);
1706 pci_msi_enabled(struct pci_devinst *pi)
1708 return (pi->pi_msi.enabled);
1712 pci_msi_maxmsgnum(struct pci_devinst *pi)
1714 if (pi->pi_msi.enabled)
1715 return (pi->pi_msi.maxmsgnum);
1721 pci_msix_enabled(struct pci_devinst *pi)
1724 return (pi->pi_msix.enabled && !pi->pi_msi.enabled);
1728 pci_generate_msix(struct pci_devinst *pi, int index)
1730 struct msix_table_entry *mte;
1732 if (!pci_msix_enabled(pi))
1735 if (pi->pi_msix.function_mask)
1738 if (index >= pi->pi_msix.table_count)
1741 mte = &pi->pi_msix.table[index];
1742 if ((mte->vector_control & PCIM_MSIX_VCTRL_MASK) == 0) {
1743 /* XXX Set PBA bit if interrupt is disabled */
1744 vm_lapic_msi(pi->pi_vmctx, mte->addr, mte->msg_data);
1749 pci_generate_msi(struct pci_devinst *pi, int index)
1752 if (pci_msi_enabled(pi) && index < pci_msi_maxmsgnum(pi)) {
1753 vm_lapic_msi(pi->pi_vmctx, pi->pi_msi.addr,
1754 pi->pi_msi.msg_data + index);
1759 pci_lintr_permitted(struct pci_devinst *pi)
1763 cmd = pci_get_cfgdata16(pi, PCIR_COMMAND);
1764 return (!(pi->pi_msi.enabled || pi->pi_msix.enabled ||
1765 (cmd & PCIM_CMD_INTxDIS)));
1769 pci_lintr_request(struct pci_devinst *pi)
1772 struct slotinfo *si;
1773 int bestpin, bestcount, pin;
1775 bi = pci_businfo[pi->pi_bus];
1779 * Just allocate a pin from our slot. The pin will be
1780 * assigned IRQs later when interrupts are routed.
1782 si = &bi->slotinfo[pi->pi_slot];
1784 bestcount = si->si_intpins[0].ii_count;
1785 for (pin = 1; pin < 4; pin++) {
1786 if (si->si_intpins[pin].ii_count < bestcount) {
1788 bestcount = si->si_intpins[pin].ii_count;
1792 si->si_intpins[bestpin].ii_count++;
1793 pi->pi_lintr.pin = bestpin + 1;
1794 pci_set_cfgdata8(pi, PCIR_INTPIN, bestpin + 1);
1798 pci_lintr_route(struct pci_devinst *pi)
1801 struct intxinfo *ii;
1803 if (pi->pi_lintr.pin == 0)
1806 bi = pci_businfo[pi->pi_bus];
1808 ii = &bi->slotinfo[pi->pi_slot].si_intpins[pi->pi_lintr.pin - 1];
1811 * Attempt to allocate an I/O APIC pin for this intpin if one
1812 * is not yet assigned.
1814 if (ii->ii_ioapic_irq == 0)
1815 ii->ii_ioapic_irq = ioapic_pci_alloc_irq(pi);
1816 assert(ii->ii_ioapic_irq > 0);
1819 * Attempt to allocate a PIRQ pin for this intpin if one is
1822 if (ii->ii_pirq_pin == 0)
1823 ii->ii_pirq_pin = pirq_alloc_pin(pi);
1824 assert(ii->ii_pirq_pin > 0);
1826 pi->pi_lintr.ioapic_irq = ii->ii_ioapic_irq;
1827 pi->pi_lintr.pirq_pin = ii->ii_pirq_pin;
1828 pci_set_cfgdata8(pi, PCIR_INTLINE, pirq_irq(ii->ii_pirq_pin));
1832 pci_lintr_assert(struct pci_devinst *pi)
1835 assert(pi->pi_lintr.pin > 0);
1837 pthread_mutex_lock(&pi->pi_lintr.lock);
1838 if (pi->pi_lintr.state == IDLE) {
1839 if (pci_lintr_permitted(pi)) {
1840 pi->pi_lintr.state = ASSERTED;
1843 pi->pi_lintr.state = PENDING;
1845 pthread_mutex_unlock(&pi->pi_lintr.lock);
1849 pci_lintr_deassert(struct pci_devinst *pi)
1852 assert(pi->pi_lintr.pin > 0);
1854 pthread_mutex_lock(&pi->pi_lintr.lock);
1855 if (pi->pi_lintr.state == ASSERTED) {
1856 pi->pi_lintr.state = IDLE;
1857 pci_irq_deassert(pi);
1858 } else if (pi->pi_lintr.state == PENDING)
1859 pi->pi_lintr.state = IDLE;
1860 pthread_mutex_unlock(&pi->pi_lintr.lock);
1864 pci_lintr_update(struct pci_devinst *pi)
1867 pthread_mutex_lock(&pi->pi_lintr.lock);
1868 if (pi->pi_lintr.state == ASSERTED && !pci_lintr_permitted(pi)) {
1869 pci_irq_deassert(pi);
1870 pi->pi_lintr.state = PENDING;
1871 } else if (pi->pi_lintr.state == PENDING && pci_lintr_permitted(pi)) {
1872 pi->pi_lintr.state = ASSERTED;
1875 pthread_mutex_unlock(&pi->pi_lintr.lock);
1879 pci_count_lintr(int bus)
1881 int count, slot, pin;
1882 struct slotinfo *slotinfo;
1885 if (pci_businfo[bus] != NULL) {
1886 for (slot = 0; slot < MAXSLOTS; slot++) {
1887 slotinfo = &pci_businfo[bus]->slotinfo[slot];
1888 for (pin = 0; pin < 4; pin++) {
1889 if (slotinfo->si_intpins[pin].ii_count != 0)
1898 pci_walk_lintr(int bus, pci_lintr_cb cb, void *arg)
1901 struct slotinfo *si;
1902 struct intxinfo *ii;
1905 if ((bi = pci_businfo[bus]) == NULL)
1908 for (slot = 0; slot < MAXSLOTS; slot++) {
1909 si = &bi->slotinfo[slot];
1910 for (pin = 0; pin < 4; pin++) {
1911 ii = &si->si_intpins[pin];
1912 if (ii->ii_count != 0)
1913 cb(bus, slot, pin + 1, ii->ii_pirq_pin,
1914 ii->ii_ioapic_irq, arg);
1920 * Return 1 if the emulated device in 'slot' is a multi-function device.
1921 * Return 0 otherwise.
1924 pci_emul_is_mfdev(int bus, int slot)
1927 struct slotinfo *si;
1931 if ((bi = pci_businfo[bus]) != NULL) {
1932 si = &bi->slotinfo[slot];
1933 for (f = 0; f < MAXFUNCS; f++) {
1934 if (si->si_funcs[f].fi_devi != NULL) {
1939 return (numfuncs > 1);
1943 * Ensure that the PCIM_MFDEV bit is properly set (or unset) depending on
1944 * whether or not is a multi-function being emulated in the pci 'slot'.
1947 pci_emul_hdrtype_fixup(int bus, int slot, int off, int bytes, uint32_t *rv)
1951 if (off <= PCIR_HDRTYPE && off + bytes > PCIR_HDRTYPE) {
1952 mfdev = pci_emul_is_mfdev(bus, slot);
1962 *rv &= ~(PCIM_MFDEV << 16);
1964 *rv |= (PCIM_MFDEV << 16);
1972 * Update device state in response to changes to the PCI command
1976 pci_emul_cmd_changed(struct pci_devinst *pi, uint16_t old)
1979 uint16_t changed, new;
1981 new = pci_get_cfgdata16(pi, PCIR_COMMAND);
1982 changed = old ^ new;
1985 * If the MMIO or I/O address space decoding has changed then
1986 * register/unregister all BARs that decode that address space.
1988 for (i = 0; i <= PCI_BARMAX_WITH_ROM; i++) {
1989 switch (pi->pi_bar[i].type) {
1991 case PCIBAR_MEMHI64:
1994 /* I/O address space decoding changed? */
1995 if (changed & PCIM_CMD_PORTEN) {
1996 if (new & PCIM_CMD_PORTEN)
1997 register_bar(pi, i);
1999 unregister_bar(pi, i);
2003 /* skip (un-)register of ROM if it disabled */
2009 /* MMIO address space decoding changed? */
2010 if (changed & PCIM_CMD_MEMEN) {
2011 if (new & PCIM_CMD_MEMEN)
2012 register_bar(pi, i);
2014 unregister_bar(pi, i);
2023 * If INTx has been unmasked and is pending, assert the
2026 pci_lintr_update(pi);
2030 pci_emul_cmdsts_write(struct pci_devinst *pi, int coff, uint32_t new, int bytes)
2033 uint32_t cmd, old, readonly;
2035 cmd = pci_get_cfgdata16(pi, PCIR_COMMAND); /* stash old value */
2038 * From PCI Local Bus Specification 3.0 sections 6.2.2 and 6.2.3.
2040 * XXX Bits 8, 11, 12, 13, 14 and 15 in the status register are
2041 * 'write 1 to clear'. However these bits are not set to '1' by
2042 * any device emulation so it is simpler to treat them as readonly.
2044 rshift = (coff & 0x3) * 8;
2045 readonly = 0xFFFFF880 >> rshift;
2047 old = CFGREAD(pi, coff, bytes);
2049 new |= (old & readonly);
2050 CFGWRITE(pi, coff, new, bytes); /* update config */
2052 pci_emul_cmd_changed(pi, cmd);
2056 pci_cfgrw(struct vmctx *ctx, int vcpu, int in, int bus, int slot, int func,
2057 int coff, int bytes, uint32_t *eax)
2060 struct slotinfo *si;
2061 struct pci_devinst *pi;
2062 struct pci_devemu *pe;
2064 uint64_t addr, bar, mask;
2066 if ((bi = pci_businfo[bus]) != NULL) {
2067 si = &bi->slotinfo[slot];
2068 pi = si->si_funcs[func].fi_devi;
2073 * Just return if there is no device at this slot:func or if the
2074 * the guest is doing an un-aligned access.
2076 if (pi == NULL || (bytes != 1 && bytes != 2 && bytes != 4) ||
2077 (coff & (bytes - 1)) != 0) {
2084 * Ignore all writes beyond the standard config space and return all
2087 if (coff >= PCI_REGMAX + 1) {
2091 * Extended capabilities begin at offset 256 in config
2092 * space. Absence of extended capabilities is signaled
2093 * with all 0s in the extended capability header at
2096 if (coff <= PCI_REGMAX + 4)
2108 /* Let the device emulation override the default handler */
2109 if (pe->pe_cfgread != NULL) {
2110 needcfg = pe->pe_cfgread(ctx, vcpu, pi, coff, bytes,
2117 *eax = CFGREAD(pi, coff, bytes);
2119 pci_emul_hdrtype_fixup(bus, slot, coff, bytes, eax);
2121 /* Let the device emulation override the default handler */
2122 if (pe->pe_cfgwrite != NULL &&
2123 (*pe->pe_cfgwrite)(ctx, vcpu, pi, coff, bytes, *eax) == 0)
2127 * Special handling for write to BAR and ROM registers
2129 if (is_pcir_bar(coff) || is_pcir_bios(coff)) {
2131 * Ignore writes to BAR registers that are not
2134 if (bytes != 4 || (coff & 0x3) != 0)
2137 if (is_pcir_bar(coff)) {
2138 idx = (coff - PCIR_BAR(0)) / 4;
2139 } else if (is_pcir_bios(coff)) {
2142 errx(4, "%s: invalid BAR offset %d", __func__,
2146 mask = ~(pi->pi_bar[idx].size - 1);
2147 switch (pi->pi_bar[idx].type) {
2149 pi->pi_bar[idx].addr = bar = 0;
2154 bar = addr | pi->pi_bar[idx].lobits;
2156 * Register the new BAR value for interception
2158 if (addr != pi->pi_bar[idx].addr) {
2159 update_bar_address(pi, addr, idx,
2164 addr = bar = *eax & mask;
2165 bar |= pi->pi_bar[idx].lobits;
2166 if (addr != pi->pi_bar[idx].addr) {
2167 update_bar_address(pi, addr, idx,
2172 addr = bar = *eax & mask;
2173 bar |= pi->pi_bar[idx].lobits;
2174 if (addr != (uint32_t)pi->pi_bar[idx].addr) {
2175 update_bar_address(pi, addr, idx,
2179 case PCIBAR_MEMHI64:
2180 mask = ~(pi->pi_bar[idx - 1].size - 1);
2181 addr = ((uint64_t)*eax << 32) & mask;
2183 if (bar != pi->pi_bar[idx - 1].addr >> 32) {
2184 update_bar_address(pi, addr, idx - 1,
2189 addr = bar = *eax & mask;
2190 if (memen(pi) && romen(pi)) {
2191 unregister_bar(pi, idx);
2193 pi->pi_bar[idx].addr = addr;
2194 pi->pi_bar[idx].lobits = *eax &
2196 /* romen could have changed it value */
2197 if (memen(pi) && romen(pi)) {
2198 register_bar(pi, idx);
2200 bar |= pi->pi_bar[idx].lobits;
2205 pci_set_cfgdata32(pi, coff, bar);
2207 } else if (pci_emul_iscap(pi, coff)) {
2208 pci_emul_capwrite(pi, coff, bytes, *eax, 0, 0);
2209 } else if (coff >= PCIR_COMMAND && coff < PCIR_REVID) {
2210 pci_emul_cmdsts_write(pi, coff, *eax, bytes);
2212 CFGWRITE(pi, coff, *eax, bytes);
2217 static int cfgenable, cfgbus, cfgslot, cfgfunc, cfgoff;
2220 pci_emul_cfgaddr(struct vmctx *ctx __unused, int vcpu __unused, int in,
2221 int port __unused, int bytes, uint32_t *eax, void *arg __unused)
2227 *eax = (bytes == 2) ? 0xffff : 0xff;
2232 x = (cfgbus << 16) | (cfgslot << 11) | (cfgfunc << 8) | cfgoff;
2238 cfgenable = (x & CONF1_ENABLE) == CONF1_ENABLE;
2239 cfgoff = (x & PCI_REGMAX) & ~0x03;
2240 cfgfunc = (x >> 8) & PCI_FUNCMAX;
2241 cfgslot = (x >> 11) & PCI_SLOTMAX;
2242 cfgbus = (x >> 16) & PCI_BUSMAX;
2247 INOUT_PORT(pci_cfgaddr, CONF1_ADDR_PORT, IOPORT_F_INOUT, pci_emul_cfgaddr);
2250 pci_emul_cfgdata(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
2251 uint32_t *eax, void *arg __unused)
2255 assert(bytes == 1 || bytes == 2 || bytes == 4);
2257 coff = cfgoff + (port - CONF1_DATA_PORT);
2259 pci_cfgrw(ctx, vcpu, in, cfgbus, cfgslot, cfgfunc, coff, bytes,
2262 /* Ignore accesses to cfgdata if not enabled by cfgaddr */
2269 INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+0, IOPORT_F_INOUT, pci_emul_cfgdata);
2270 INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+1, IOPORT_F_INOUT, pci_emul_cfgdata);
2271 INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+2, IOPORT_F_INOUT, pci_emul_cfgdata);
2272 INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+3, IOPORT_F_INOUT, pci_emul_cfgdata);
2274 #ifdef BHYVE_SNAPSHOT
2276 * Saves/restores PCI device emulated state. Returns 0 on success.
2279 pci_snapshot_pci_dev(struct vm_snapshot_meta *meta)
2281 struct pci_devinst *pi;
2285 pi = meta->dev_data;
2287 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msi.enabled, meta, ret, done);
2288 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msi.addr, meta, ret, done);
2289 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msi.msg_data, meta, ret, done);
2290 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msi.maxmsgnum, meta, ret, done);
2292 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.enabled, meta, ret, done);
2293 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.table_bar, meta, ret, done);
2294 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.pba_bar, meta, ret, done);
2295 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.table_offset, meta, ret, done);
2296 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.table_count, meta, ret, done);
2297 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.pba_offset, meta, ret, done);
2298 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.pba_size, meta, ret, done);
2299 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.function_mask, meta, ret, done);
2301 SNAPSHOT_BUF_OR_LEAVE(pi->pi_cfgdata, sizeof(pi->pi_cfgdata),
2304 for (i = 0; i < (int)nitems(pi->pi_bar); i++) {
2305 SNAPSHOT_VAR_OR_LEAVE(pi->pi_bar[i].type, meta, ret, done);
2306 SNAPSHOT_VAR_OR_LEAVE(pi->pi_bar[i].size, meta, ret, done);
2307 SNAPSHOT_VAR_OR_LEAVE(pi->pi_bar[i].addr, meta, ret, done);
2310 /* Restore MSI-X table. */
2311 for (i = 0; i < pi->pi_msix.table_count; i++) {
2312 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.table[i].addr,
2314 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.table[i].msg_data,
2316 SNAPSHOT_VAR_OR_LEAVE(pi->pi_msix.table[i].vector_control,
2325 pci_find_slotted_dev(const char *dev_name, struct pci_devemu **pde,
2326 struct pci_devinst **pdi)
2329 struct slotinfo *si;
2330 struct funcinfo *fi;
2331 int bus, slot, func;
2333 assert(dev_name != NULL);
2334 assert(pde != NULL);
2335 assert(pdi != NULL);
2337 for (bus = 0; bus < MAXBUSES; bus++) {
2338 if ((bi = pci_businfo[bus]) == NULL)
2341 for (slot = 0; slot < MAXSLOTS; slot++) {
2342 si = &bi->slotinfo[slot];
2343 for (func = 0; func < MAXFUNCS; func++) {
2344 fi = &si->si_funcs[func];
2345 if (fi->fi_pde == NULL)
2347 if (strcmp(dev_name, fi->fi_pde->pe_emu) != 0)
2361 pci_snapshot(struct vm_snapshot_meta *meta)
2363 struct pci_devemu *pde;
2364 struct pci_devinst *pdi;
2367 assert(meta->dev_name != NULL);
2369 ret = pci_find_slotted_dev(meta->dev_name, &pde, &pdi);
2371 fprintf(stderr, "%s: no such name: %s\r\n",
2372 __func__, meta->dev_name);
2373 memset(meta->buffer.buf_start, 0, meta->buffer.buf_size);
2377 meta->dev_data = pdi;
2379 if (pde->pe_snapshot == NULL) {
2380 fprintf(stderr, "%s: not implemented yet for: %s\r\n",
2381 __func__, meta->dev_name);
2385 ret = pci_snapshot_pci_dev(meta);
2387 fprintf(stderr, "%s: failed to snapshot pci dev\r\n",
2392 ret = (*pde->pe_snapshot)(meta);
2398 pci_pause(struct vmctx *ctx, const char *dev_name)
2400 struct pci_devemu *pde;
2401 struct pci_devinst *pdi;
2404 assert(dev_name != NULL);
2406 ret = pci_find_slotted_dev(dev_name, &pde, &pdi);
2409 * It is possible to call this function without
2410 * checking that the device is inserted first.
2412 fprintf(stderr, "%s: no such name: %s\n", __func__, dev_name);
2416 if (pde->pe_pause == NULL) {
2417 /* The pause/resume functionality is optional. */
2418 fprintf(stderr, "%s: not implemented for: %s\n",
2419 __func__, dev_name);
2423 return (*pde->pe_pause)(ctx, pdi);
2427 pci_resume(struct vmctx *ctx, const char *dev_name)
2429 struct pci_devemu *pde;
2430 struct pci_devinst *pdi;
2433 assert(dev_name != NULL);
2435 ret = pci_find_slotted_dev(dev_name, &pde, &pdi);
2438 * It is possible to call this function without
2439 * checking that the device is inserted first.
2441 fprintf(stderr, "%s: no such name: %s\n", __func__, dev_name);
2445 if (pde->pe_resume == NULL) {
2446 /* The pause/resume functionality is optional. */
2447 fprintf(stderr, "%s: not implemented for: %s\n",
2448 __func__, dev_name);
2452 return (*pde->pe_resume)(ctx, pdi);
2456 #define PCI_EMUL_TEST
2457 #ifdef PCI_EMUL_TEST
2459 * Define a dummy test device
2463 struct pci_emul_dsoftc {
2464 uint8_t ioregs[DIOSZ];
2465 uint8_t memregs[2][DMEMSZ];
2468 #define PCI_EMUL_MSI_MSGS 4
2469 #define PCI_EMUL_MSIX_MSGS 16
2472 pci_emul_dinit(struct vmctx *ctx __unused, struct pci_devinst *pi,
2473 nvlist_t *nvl __unused)
2476 struct pci_emul_dsoftc *sc;
2478 sc = calloc(1, sizeof(struct pci_emul_dsoftc));
2482 pci_set_cfgdata16(pi, PCIR_DEVICE, 0x0001);
2483 pci_set_cfgdata16(pi, PCIR_VENDOR, 0x10DD);
2484 pci_set_cfgdata8(pi, PCIR_CLASS, 0x02);
2486 error = pci_emul_add_msicap(pi, PCI_EMUL_MSI_MSGS);
2489 error = pci_emul_alloc_bar(pi, 0, PCIBAR_IO, DIOSZ);
2492 error = pci_emul_alloc_bar(pi, 1, PCIBAR_MEM32, DMEMSZ);
2495 error = pci_emul_alloc_bar(pi, 2, PCIBAR_MEM32, DMEMSZ);
2502 pci_emul_diow(struct vmctx *ctx __unused, int vcpu __unused,
2503 struct pci_devinst *pi, int baridx, uint64_t offset, int size,
2507 struct pci_emul_dsoftc *sc = pi->pi_arg;
2510 if (offset + size > DIOSZ) {
2511 printf("diow: iow too large, offset %ld size %d\n",
2517 sc->ioregs[offset] = value & 0xff;
2518 } else if (size == 2) {
2519 *(uint16_t *)&sc->ioregs[offset] = value & 0xffff;
2520 } else if (size == 4) {
2521 *(uint32_t *)&sc->ioregs[offset] = value;
2523 printf("diow: iow unknown size %d\n", size);
2527 * Special magic value to generate an interrupt
2529 if (offset == 4 && size == 4 && pci_msi_enabled(pi))
2530 pci_generate_msi(pi, value % pci_msi_maxmsgnum(pi));
2532 if (value == 0xabcdef) {
2533 for (i = 0; i < pci_msi_maxmsgnum(pi); i++)
2534 pci_generate_msi(pi, i);
2538 if (baridx == 1 || baridx == 2) {
2539 if (offset + size > DMEMSZ) {
2540 printf("diow: memw too large, offset %ld size %d\n",
2545 i = baridx - 1; /* 'memregs' index */
2548 sc->memregs[i][offset] = value;
2549 } else if (size == 2) {
2550 *(uint16_t *)&sc->memregs[i][offset] = value;
2551 } else if (size == 4) {
2552 *(uint32_t *)&sc->memregs[i][offset] = value;
2553 } else if (size == 8) {
2554 *(uint64_t *)&sc->memregs[i][offset] = value;
2556 printf("diow: memw unknown size %d\n", size);
2560 * magic interrupt ??
2564 if (baridx > 2 || baridx < 0) {
2565 printf("diow: unknown bar idx %d\n", baridx);
2570 pci_emul_dior(struct vmctx *ctx __unused, int vcpu __unused,
2571 struct pci_devinst *pi, int baridx, uint64_t offset, int size)
2573 struct pci_emul_dsoftc *sc = pi->pi_arg;
2578 if (offset + size > DIOSZ) {
2579 printf("dior: ior too large, offset %ld size %d\n",
2586 value = sc->ioregs[offset];
2587 } else if (size == 2) {
2588 value = *(uint16_t *) &sc->ioregs[offset];
2589 } else if (size == 4) {
2590 value = *(uint32_t *) &sc->ioregs[offset];
2592 printf("dior: ior unknown size %d\n", size);
2596 if (baridx == 1 || baridx == 2) {
2597 if (offset + size > DMEMSZ) {
2598 printf("dior: memr too large, offset %ld size %d\n",
2603 i = baridx - 1; /* 'memregs' index */
2606 value = sc->memregs[i][offset];
2607 } else if (size == 2) {
2608 value = *(uint16_t *) &sc->memregs[i][offset];
2609 } else if (size == 4) {
2610 value = *(uint32_t *) &sc->memregs[i][offset];
2611 } else if (size == 8) {
2612 value = *(uint64_t *) &sc->memregs[i][offset];
2614 printf("dior: ior unknown size %d\n", size);
2619 if (baridx > 2 || baridx < 0) {
2620 printf("dior: unknown bar idx %d\n", baridx);
2627 #ifdef BHYVE_SNAPSHOT
2629 pci_emul_snapshot(struct vm_snapshot_meta *meta __unused)
2635 static const struct pci_devemu pci_dummy = {
2637 .pe_init = pci_emul_dinit,
2638 .pe_barwrite = pci_emul_diow,
2639 .pe_barread = pci_emul_dior,
2640 #ifdef BHYVE_SNAPSHOT
2641 .pe_snapshot = pci_emul_snapshot,
2644 PCI_EMUL_SET(pci_dummy);
2646 #endif /* PCI_EMUL_TEST */