2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
5 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
6 * Copyright (c) 2000, BSDi
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
39 #include <sys/endian.h>
40 #include <sys/eventhandler.h>
41 #include <sys/fcntl.h>
42 #include <sys/kernel.h>
43 #include <sys/limits.h>
44 #include <sys/linker.h>
45 #include <sys/malloc.h>
46 #include <sys/module.h>
47 #include <sys/queue.h>
48 #include <sys/sysctl.h>
49 #include <sys/systm.h>
53 #include <vm/vm_extern.h>
56 #include <machine/bus.h>
58 #include <machine/resource.h>
59 #include <machine/stdarg.h>
61 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
62 #include <machine/intr_machdep.h>
65 #include <sys/pciio.h>
66 #include <dev/pci/pcireg.h>
67 #include <dev/pci/pcivar.h>
68 #include <dev/pci/pci_private.h>
72 #include <dev/pci/pci_iov_private.h>
75 #include <dev/usb/controller/xhcireg.h>
76 #include <dev/usb/controller/ehcireg.h>
77 #include <dev/usb/controller/ohcireg.h>
78 #include <dev/usb/controller/uhcireg.h>
83 #define PCIR_IS_BIOS(cfg, reg) \
84 (((cfg)->hdrtype == PCIM_HDRTYPE_NORMAL && reg == PCIR_BIOS) || \
85 ((cfg)->hdrtype == PCIM_HDRTYPE_BRIDGE && reg == PCIR_BIOS_1))
87 static int pci_has_quirk(uint32_t devid, int quirk);
88 static pci_addr_t pci_mapbase(uint64_t mapreg);
89 static const char *pci_maptype(uint64_t mapreg);
90 static int pci_maprange(uint64_t mapreg);
91 static pci_addr_t pci_rombase(uint64_t mapreg);
92 static int pci_romsize(uint64_t testval);
93 static void pci_fixancient(pcicfgregs *cfg);
94 static int pci_printf(pcicfgregs *cfg, const char *fmt, ...);
96 static int pci_porten(device_t dev);
97 static int pci_memen(device_t dev);
98 static void pci_assign_interrupt(device_t bus, device_t dev,
100 static int pci_add_map(device_t bus, device_t dev, int reg,
101 struct resource_list *rl, int force, int prefetch);
102 static int pci_probe(device_t dev);
103 static void pci_load_vendor_data(void);
104 static int pci_describe_parse_line(char **ptr, int *vendor,
105 int *device, char **desc);
106 static char *pci_describe_device(device_t dev);
107 static int pci_modevent(module_t mod, int what, void *arg);
108 static void pci_hdrtypedata(device_t pcib, int b, int s, int f,
110 static void pci_read_cap(device_t pcib, pcicfgregs *cfg);
111 static int pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg,
112 int reg, uint32_t *data);
114 static int pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg,
115 int reg, uint32_t data);
117 static void pci_read_vpd(device_t pcib, pcicfgregs *cfg);
118 static void pci_mask_msix(device_t dev, u_int index);
119 static void pci_unmask_msix(device_t dev, u_int index);
120 static int pci_msi_blacklisted(void);
121 static int pci_msix_blacklisted(void);
122 static void pci_resume_msi(device_t dev);
123 static void pci_resume_msix(device_t dev);
124 static int pci_remap_intr_method(device_t bus, device_t dev,
126 static void pci_hint_device_unit(device_t acdev, device_t child,
127 const char *name, int *unitp);
128 static int pci_reset_post(device_t dev, device_t child);
129 static int pci_reset_prepare(device_t dev, device_t child);
130 static int pci_reset_child(device_t dev, device_t child,
133 static int pci_get_id_method(device_t dev, device_t child,
134 enum pci_id_type type, uintptr_t *rid);
136 static struct pci_devinfo * pci_fill_devinfo(device_t pcib, device_t bus, int d,
137 int b, int s, int f, uint16_t vid, uint16_t did);
139 static device_method_t pci_methods[] = {
140 /* Device interface */
141 DEVMETHOD(device_probe, pci_probe),
142 DEVMETHOD(device_attach, pci_attach),
143 DEVMETHOD(device_detach, pci_detach),
144 DEVMETHOD(device_shutdown, bus_generic_shutdown),
145 DEVMETHOD(device_suspend, bus_generic_suspend),
146 DEVMETHOD(device_resume, pci_resume),
149 DEVMETHOD(bus_print_child, pci_print_child),
150 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
151 DEVMETHOD(bus_read_ivar, pci_read_ivar),
152 DEVMETHOD(bus_write_ivar, pci_write_ivar),
153 DEVMETHOD(bus_driver_added, pci_driver_added),
154 DEVMETHOD(bus_setup_intr, pci_setup_intr),
155 DEVMETHOD(bus_teardown_intr, pci_teardown_intr),
156 DEVMETHOD(bus_reset_prepare, pci_reset_prepare),
157 DEVMETHOD(bus_reset_post, pci_reset_post),
158 DEVMETHOD(bus_reset_child, pci_reset_child),
160 DEVMETHOD(bus_get_dma_tag, pci_get_dma_tag),
161 DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
162 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
163 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
164 DEVMETHOD(bus_delete_resource, pci_delete_resource),
165 DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
166 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
167 DEVMETHOD(bus_release_resource, pci_release_resource),
168 DEVMETHOD(bus_activate_resource, pci_activate_resource),
169 DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource),
170 DEVMETHOD(bus_child_deleted, pci_child_deleted),
171 DEVMETHOD(bus_child_detached, pci_child_detached),
172 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
173 DEVMETHOD(bus_child_location_str, pci_child_location_str_method),
174 DEVMETHOD(bus_hint_device_unit, pci_hint_device_unit),
175 DEVMETHOD(bus_remap_intr, pci_remap_intr_method),
176 DEVMETHOD(bus_suspend_child, pci_suspend_child),
177 DEVMETHOD(bus_resume_child, pci_resume_child),
178 DEVMETHOD(bus_rescan, pci_rescan_method),
181 DEVMETHOD(pci_read_config, pci_read_config_method),
182 DEVMETHOD(pci_write_config, pci_write_config_method),
183 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
184 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
185 DEVMETHOD(pci_enable_io, pci_enable_io_method),
186 DEVMETHOD(pci_disable_io, pci_disable_io_method),
187 DEVMETHOD(pci_get_vpd_ident, pci_get_vpd_ident_method),
188 DEVMETHOD(pci_get_vpd_readonly, pci_get_vpd_readonly_method),
189 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
190 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
191 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
192 DEVMETHOD(pci_find_cap, pci_find_cap_method),
193 DEVMETHOD(pci_find_next_cap, pci_find_next_cap_method),
194 DEVMETHOD(pci_find_extcap, pci_find_extcap_method),
195 DEVMETHOD(pci_find_next_extcap, pci_find_next_extcap_method),
196 DEVMETHOD(pci_find_htcap, pci_find_htcap_method),
197 DEVMETHOD(pci_find_next_htcap, pci_find_next_htcap_method),
198 DEVMETHOD(pci_alloc_msi, pci_alloc_msi_method),
199 DEVMETHOD(pci_alloc_msix, pci_alloc_msix_method),
200 DEVMETHOD(pci_enable_msi, pci_enable_msi_method),
201 DEVMETHOD(pci_enable_msix, pci_enable_msix_method),
202 DEVMETHOD(pci_disable_msi, pci_disable_msi_method),
203 DEVMETHOD(pci_remap_msix, pci_remap_msix_method),
204 DEVMETHOD(pci_release_msi, pci_release_msi_method),
205 DEVMETHOD(pci_msi_count, pci_msi_count_method),
206 DEVMETHOD(pci_msix_count, pci_msix_count_method),
207 DEVMETHOD(pci_msix_pba_bar, pci_msix_pba_bar_method),
208 DEVMETHOD(pci_msix_table_bar, pci_msix_table_bar_method),
209 DEVMETHOD(pci_get_id, pci_get_id_method),
210 DEVMETHOD(pci_alloc_devinfo, pci_alloc_devinfo_method),
211 DEVMETHOD(pci_child_added, pci_child_added_method),
213 DEVMETHOD(pci_iov_attach, pci_iov_attach_method),
214 DEVMETHOD(pci_iov_detach, pci_iov_detach_method),
215 DEVMETHOD(pci_create_iov_child, pci_create_iov_child_method),
221 DEFINE_CLASS_0(pci, pci_driver, pci_methods, sizeof(struct pci_softc));
223 static devclass_t pci_devclass;
224 EARLY_DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, NULL,
226 MODULE_VERSION(pci, 1);
228 static char *pci_vendordata;
229 static size_t pci_vendordata_size;
232 uint32_t devid; /* Vendor/device of the card */
234 #define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */
235 #define PCI_QUIRK_DISABLE_MSI 2 /* Neither MSI nor MSI-X work */
236 #define PCI_QUIRK_ENABLE_MSI_VM 3 /* Older chipset in VM where MSI works */
237 #define PCI_QUIRK_UNMAP_REG 4 /* Ignore PCI map register */
238 #define PCI_QUIRK_DISABLE_MSIX 5 /* MSI-X doesn't work */
239 #define PCI_QUIRK_MSI_INTX_BUG 6 /* PCIM_CMD_INTxDIS disables MSI */
240 #define PCI_QUIRK_REALLOC_BAR 7 /* Can't allocate memory at the default address */
245 static const struct pci_quirk pci_quirks[] = {
246 /* The Intel 82371AB and 82443MX have a map register at offset 0x90. */
247 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 },
248 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 },
249 /* As does the Serverworks OSB4 (the SMBus mapping register) */
250 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 },
253 * MSI doesn't work with the ServerWorks CNB20-HE Host Bridge
254 * or the CMIC-SL (AKA ServerWorks GC_LE).
256 { 0x00141166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
257 { 0x00171166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
260 * MSI doesn't work on earlier Intel chipsets including
261 * E7500, E7501, E7505, 845, 865, 875/E7210, and 855.
263 { 0x25408086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
264 { 0x254c8086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
265 { 0x25508086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
266 { 0x25608086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
267 { 0x25708086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
268 { 0x25788086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
269 { 0x35808086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
272 * MSI doesn't work with devices behind the AMD 8131 HT-PCIX
275 { 0x74501022, PCI_QUIRK_DISABLE_MSI, 0, 0 },
278 * Some virtualization environments emulate an older chipset
279 * but support MSI just fine. QEMU uses the Intel 82440.
281 { 0x12378086, PCI_QUIRK_ENABLE_MSI_VM, 0, 0 },
284 * HPET MMIO base address may appear in Bar1 for AMD SB600 SMBus
285 * controller depending on SoftPciRst register (PM_IO 0x55 [7]).
286 * It prevents us from attaching hpet(4) when the bit is unset.
287 * Note this quirk only affects SB600 revision A13 and earlier.
288 * For SB600 A21 and later, firmware must set the bit to hide it.
289 * For SB700 and later, it is unused and hardcoded to zero.
291 { 0x43851002, PCI_QUIRK_UNMAP_REG, 0x14, 0 },
294 * Atheros AR8161/AR8162/E2200/E2400/E2500 Ethernet controllers have
295 * a bug that MSI interrupt does not assert if PCIM_CMD_INTxDIS bit
296 * of the command register is set.
298 { 0x10911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
299 { 0xE0911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
300 { 0xE0A11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
301 { 0xE0B11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
302 { 0x10901969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
305 * Broadcom BCM5714(S)/BCM5715(S)/BCM5780(S) Ethernet MACs don't
306 * issue MSI interrupts with PCIM_CMD_INTxDIS set either.
308 { 0x166814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714 */
309 { 0x166914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714S */
310 { 0x166a14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780 */
311 { 0x166b14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780S */
312 { 0x167814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715 */
313 { 0x167914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715S */
316 * HPE Gen 10 VGA has a memory range that can't be allocated in the
319 { 0x98741002, PCI_QUIRK_REALLOC_BAR, 0, 0 },
324 /* map register information */
325 #define PCI_MAPMEM 0x01 /* memory map */
326 #define PCI_MAPMEMP 0x02 /* prefetchable memory map */
327 #define PCI_MAPPORT 0x04 /* port map */
329 struct devlist pci_devq;
330 uint32_t pci_generation;
331 uint32_t pci_numdevs = 0;
332 static int pcie_chipset, pcix_chipset;
335 SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
336 "PCI bus tuning parameters");
338 static int pci_enable_io_modes = 1;
339 SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RWTUN,
340 &pci_enable_io_modes, 1,
341 "Enable I/O and memory bits in the config register. Some BIOSes do not"
342 " enable these bits correctly. We'd like to do this all the time, but"
343 " there are some peripherals that this causes problems with.");
345 static int pci_do_realloc_bars = 1;
346 SYSCTL_INT(_hw_pci, OID_AUTO, realloc_bars, CTLFLAG_RWTUN,
347 &pci_do_realloc_bars, 0,
348 "Attempt to allocate a new range for any BARs whose original "
349 "firmware-assigned ranges fail to allocate during the initial device scan.");
351 static int pci_do_power_nodriver = 0;
352 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_nodriver, CTLFLAG_RWTUN,
353 &pci_do_power_nodriver, 0,
354 "Place a function into D3 state when no driver attaches to it. 0 means"
355 " disable. 1 means conservatively place devices into D3 state. 2 means"
356 " aggressively place devices into D3 state. 3 means put absolutely"
357 " everything in D3 state.");
359 int pci_do_power_resume = 1;
360 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_resume, CTLFLAG_RWTUN,
361 &pci_do_power_resume, 1,
362 "Transition from D3 -> D0 on resume.");
364 int pci_do_power_suspend = 1;
365 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_suspend, CTLFLAG_RWTUN,
366 &pci_do_power_suspend, 1,
367 "Transition from D0 -> D3 on suspend.");
369 static int pci_do_msi = 1;
370 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msi, CTLFLAG_RWTUN, &pci_do_msi, 1,
371 "Enable support for MSI interrupts");
373 static int pci_do_msix = 1;
374 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msix, CTLFLAG_RWTUN, &pci_do_msix, 1,
375 "Enable support for MSI-X interrupts");
377 static int pci_msix_rewrite_table = 0;
378 SYSCTL_INT(_hw_pci, OID_AUTO, msix_rewrite_table, CTLFLAG_RWTUN,
379 &pci_msix_rewrite_table, 0,
380 "Rewrite entire MSI-X table when updating MSI-X entries");
382 static int pci_honor_msi_blacklist = 1;
383 SYSCTL_INT(_hw_pci, OID_AUTO, honor_msi_blacklist, CTLFLAG_RDTUN,
384 &pci_honor_msi_blacklist, 1, "Honor chipset blacklist for MSI/MSI-X");
386 #if defined(__i386__) || defined(__amd64__)
387 static int pci_usb_takeover = 1;
389 static int pci_usb_takeover = 0;
391 SYSCTL_INT(_hw_pci, OID_AUTO, usb_early_takeover, CTLFLAG_RDTUN,
392 &pci_usb_takeover, 1,
393 "Enable early takeover of USB controllers. Disable this if you depend on"
394 " BIOS emulation of USB devices, that is you use USB devices (like"
395 " keyboard or mouse) but do not load USB drivers");
397 static int pci_clear_bars;
398 SYSCTL_INT(_hw_pci, OID_AUTO, clear_bars, CTLFLAG_RDTUN, &pci_clear_bars, 0,
399 "Ignore firmware-assigned resources for BARs.");
401 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
402 static int pci_clear_buses;
403 SYSCTL_INT(_hw_pci, OID_AUTO, clear_buses, CTLFLAG_RDTUN, &pci_clear_buses, 0,
404 "Ignore firmware-assigned bus numbers.");
407 static int pci_enable_ari = 1;
408 SYSCTL_INT(_hw_pci, OID_AUTO, enable_ari, CTLFLAG_RDTUN, &pci_enable_ari,
409 0, "Enable support for PCIe Alternative RID Interpretation");
412 SYSCTL_INT(_hw_pci, OID_AUTO, enable_aspm, CTLFLAG_RDTUN, &pci_enable_aspm,
413 0, "Enable support for PCIe Active State Power Management");
415 static int pci_clear_aer_on_attach = 0;
416 SYSCTL_INT(_hw_pci, OID_AUTO, clear_aer_on_attach, CTLFLAG_RWTUN,
417 &pci_clear_aer_on_attach, 0,
418 "Clear port and device AER state on driver attach");
421 pci_has_quirk(uint32_t devid, int quirk)
423 const struct pci_quirk *q;
425 for (q = &pci_quirks[0]; q->devid; q++) {
426 if (q->devid == devid && q->type == quirk)
432 /* Find a device_t by bus/slot/function in domain 0 */
435 pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func)
438 return (pci_find_dbsf(0, bus, slot, func));
441 /* Find a device_t by domain/bus/slot/function */
444 pci_find_dbsf(uint32_t domain, uint8_t bus, uint8_t slot, uint8_t func)
446 struct pci_devinfo *dinfo = NULL;
448 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
449 if ((dinfo->cfg.domain == domain) &&
450 (dinfo->cfg.bus == bus) &&
451 (dinfo->cfg.slot == slot) &&
452 (dinfo->cfg.func == func)) {
457 return (dinfo != NULL ? dinfo->cfg.dev : NULL);
460 /* Find a device_t by vendor/device ID */
463 pci_find_device(uint16_t vendor, uint16_t device)
465 struct pci_devinfo *dinfo;
467 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
468 if ((dinfo->cfg.vendor == vendor) &&
469 (dinfo->cfg.device == device)) {
470 return (dinfo->cfg.dev);
478 pci_find_class(uint8_t class, uint8_t subclass)
480 struct pci_devinfo *dinfo;
482 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
483 if (dinfo->cfg.baseclass == class &&
484 dinfo->cfg.subclass == subclass) {
485 return (dinfo->cfg.dev);
493 pci_printf(pcicfgregs *cfg, const char *fmt, ...)
498 retval = printf("pci%d:%d:%d:%d: ", cfg->domain, cfg->bus, cfg->slot,
501 retval += vprintf(fmt, ap);
506 /* return base address of memory or port map */
509 pci_mapbase(uint64_t mapreg)
512 if (PCI_BAR_MEM(mapreg))
513 return (mapreg & PCIM_BAR_MEM_BASE);
515 return (mapreg & PCIM_BAR_IO_BASE);
518 /* return map type of memory or port map */
521 pci_maptype(uint64_t mapreg)
524 if (PCI_BAR_IO(mapreg))
526 if (mapreg & PCIM_BAR_MEM_PREFETCH)
527 return ("Prefetchable Memory");
531 /* return log2 of map size decoded for memory or port map */
534 pci_mapsize(uint64_t testval)
538 testval = pci_mapbase(testval);
541 while ((testval & 1) == 0)
550 /* return base address of device ROM */
553 pci_rombase(uint64_t mapreg)
556 return (mapreg & PCIM_BIOS_ADDR_MASK);
559 /* return log2 of map size decided for device ROM */
562 pci_romsize(uint64_t testval)
566 testval = pci_rombase(testval);
569 while ((testval & 1) == 0)
578 /* return log2 of address range supported by map register */
581 pci_maprange(uint64_t mapreg)
585 if (PCI_BAR_IO(mapreg))
588 switch (mapreg & PCIM_BAR_MEM_TYPE) {
589 case PCIM_BAR_MEM_32:
592 case PCIM_BAR_MEM_1MB:
595 case PCIM_BAR_MEM_64:
602 /* adjust some values from PCI 1.0 devices to match 2.0 standards ... */
605 pci_fixancient(pcicfgregs *cfg)
607 if ((cfg->hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL)
610 /* PCI to PCI bridges use header type 1 */
611 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI)
612 cfg->hdrtype = PCIM_HDRTYPE_BRIDGE;
615 /* extract header type specific config data */
618 pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg)
620 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
621 switch (cfg->hdrtype & PCIM_HDRTYPE) {
622 case PCIM_HDRTYPE_NORMAL:
623 cfg->subvendor = REG(PCIR_SUBVEND_0, 2);
624 cfg->subdevice = REG(PCIR_SUBDEV_0, 2);
625 cfg->mingnt = REG(PCIR_MINGNT, 1);
626 cfg->maxlat = REG(PCIR_MAXLAT, 1);
627 cfg->nummaps = PCI_MAXMAPS_0;
629 case PCIM_HDRTYPE_BRIDGE:
630 cfg->bridge.br_seclat = REG(PCIR_SECLAT_1, 1);
631 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_1, 1);
632 cfg->bridge.br_secbus = REG(PCIR_SECBUS_1, 1);
633 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_1, 1);
634 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_1, 2);
635 cfg->nummaps = PCI_MAXMAPS_1;
637 case PCIM_HDRTYPE_CARDBUS:
638 cfg->bridge.br_seclat = REG(PCIR_SECLAT_2, 1);
639 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_2, 1);
640 cfg->bridge.br_secbus = REG(PCIR_SECBUS_2, 1);
641 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_2, 1);
642 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_2, 2);
643 cfg->subvendor = REG(PCIR_SUBVEND_2, 2);
644 cfg->subdevice = REG(PCIR_SUBDEV_2, 2);
645 cfg->nummaps = PCI_MAXMAPS_2;
651 /* read configuration header into pcicfgregs structure */
653 pci_read_device(device_t pcib, device_t bus, int d, int b, int s, int f)
655 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
658 vid = REG(PCIR_VENDOR, 2);
659 did = REG(PCIR_DEVICE, 2);
661 return (pci_fill_devinfo(pcib, bus, d, b, s, f, vid, did));
667 pci_alloc_devinfo_method(device_t dev)
670 return (malloc(sizeof(struct pci_devinfo), M_DEVBUF,
674 static struct pci_devinfo *
675 pci_fill_devinfo(device_t pcib, device_t bus, int d, int b, int s, int f,
676 uint16_t vid, uint16_t did)
678 struct pci_devinfo *devlist_entry;
681 devlist_entry = PCI_ALLOC_DEVINFO(bus);
683 cfg = &devlist_entry->cfg;
691 cfg->cmdreg = REG(PCIR_COMMAND, 2);
692 cfg->statreg = REG(PCIR_STATUS, 2);
693 cfg->baseclass = REG(PCIR_CLASS, 1);
694 cfg->subclass = REG(PCIR_SUBCLASS, 1);
695 cfg->progif = REG(PCIR_PROGIF, 1);
696 cfg->revid = REG(PCIR_REVID, 1);
697 cfg->hdrtype = REG(PCIR_HDRTYPE, 1);
698 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1);
699 cfg->lattimer = REG(PCIR_LATTIMER, 1);
700 cfg->intpin = REG(PCIR_INTPIN, 1);
701 cfg->intline = REG(PCIR_INTLINE, 1);
703 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0;
704 cfg->hdrtype &= ~PCIM_MFDEV;
705 STAILQ_INIT(&cfg->maps);
710 pci_hdrtypedata(pcib, b, s, f, cfg);
712 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT)
713 pci_read_cap(pcib, cfg);
715 STAILQ_INSERT_TAIL(&pci_devq, devlist_entry, pci_links);
717 devlist_entry->conf.pc_sel.pc_domain = cfg->domain;
718 devlist_entry->conf.pc_sel.pc_bus = cfg->bus;
719 devlist_entry->conf.pc_sel.pc_dev = cfg->slot;
720 devlist_entry->conf.pc_sel.pc_func = cfg->func;
721 devlist_entry->conf.pc_hdr = cfg->hdrtype;
723 devlist_entry->conf.pc_subvendor = cfg->subvendor;
724 devlist_entry->conf.pc_subdevice = cfg->subdevice;
725 devlist_entry->conf.pc_vendor = cfg->vendor;
726 devlist_entry->conf.pc_device = cfg->device;
728 devlist_entry->conf.pc_class = cfg->baseclass;
729 devlist_entry->conf.pc_subclass = cfg->subclass;
730 devlist_entry->conf.pc_progif = cfg->progif;
731 devlist_entry->conf.pc_revid = cfg->revid;
736 return (devlist_entry);
741 pci_ea_fill_info(device_t pcib, pcicfgregs *cfg)
743 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, \
744 cfg->ea.ea_location + (n), w)
751 uint64_t base, max_offset;
752 struct pci_ea_entry *eae;
754 if (cfg->ea.ea_location == 0)
757 STAILQ_INIT(&cfg->ea.ea_entries);
759 /* Determine the number of entries */
760 num_ent = REG(PCIR_EA_NUM_ENT, 2);
761 num_ent &= PCIM_EA_NUM_ENT_MASK;
763 /* Find the first entry to care of */
764 ptr = PCIR_EA_FIRST_ENT;
766 /* Skip DWORD 2 for type 1 functions */
767 if ((cfg->hdrtype & PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE)
770 for (a = 0; a < num_ent; a++) {
772 eae = malloc(sizeof(*eae), M_DEVBUF, M_WAITOK | M_ZERO);
773 eae->eae_cfg_offset = cfg->ea.ea_location + ptr;
775 /* Read a number of dwords in the entry */
778 ent_size = (val & PCIM_EA_ES);
780 for (b = 0; b < ent_size; b++) {
785 eae->eae_flags = val;
786 eae->eae_bei = (PCIM_EA_BEI & val) >> PCIM_EA_BEI_OFFSET;
788 base = dw[0] & PCIM_EA_FIELD_MASK;
789 max_offset = dw[1] | ~PCIM_EA_FIELD_MASK;
791 if (((dw[0] & PCIM_EA_IS_64) != 0) && (b < ent_size)) {
792 base |= (uint64_t)dw[b] << 32UL;
795 if (((dw[1] & PCIM_EA_IS_64) != 0)
797 max_offset |= (uint64_t)dw[b] << 32UL;
801 eae->eae_base = base;
802 eae->eae_max_offset = max_offset;
804 STAILQ_INSERT_TAIL(&cfg->ea.ea_entries, eae, eae_link);
807 printf("PCI(EA) dev %04x:%04x, bei %d, flags #%x, base #%jx, max_offset #%jx\n",
808 cfg->vendor, cfg->device, eae->eae_bei, eae->eae_flags,
809 (uintmax_t)eae->eae_base, (uintmax_t)eae->eae_max_offset);
816 pci_read_cap(device_t pcib, pcicfgregs *cfg)
818 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w)
819 #define WREG(n, v, w) PCIB_WRITE_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, v, w)
820 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
824 int ptr, nextptr, ptrptr;
826 switch (cfg->hdrtype & PCIM_HDRTYPE) {
827 case PCIM_HDRTYPE_NORMAL:
828 case PCIM_HDRTYPE_BRIDGE:
829 ptrptr = PCIR_CAP_PTR;
831 case PCIM_HDRTYPE_CARDBUS:
832 ptrptr = PCIR_CAP_PTR_2; /* cardbus capabilities ptr */
835 return; /* no extended capabilities support */
837 nextptr = REG(ptrptr, 1); /* sanity check? */
840 * Read capability entries.
842 while (nextptr != 0) {
845 printf("illegal PCI extended capability offset %d\n",
849 /* Find the next entry */
851 nextptr = REG(ptr + PCICAP_NEXTPTR, 1);
853 /* Process this entry */
854 switch (REG(ptr + PCICAP_ID, 1)) {
855 case PCIY_PMG: /* PCI power management */
856 if (cfg->pp.pp_cap == 0) {
857 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2);
858 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS;
859 cfg->pp.pp_bse = ptr + PCIR_POWER_BSE;
860 if ((nextptr - ptr) > PCIR_POWER_DATA)
861 cfg->pp.pp_data = ptr + PCIR_POWER_DATA;
864 case PCIY_HT: /* HyperTransport */
865 /* Determine HT-specific capability type. */
866 val = REG(ptr + PCIR_HT_COMMAND, 2);
868 if ((val & 0xe000) == PCIM_HTCAP_SLAVE)
869 cfg->ht.ht_slave = ptr;
871 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
872 switch (val & PCIM_HTCMD_CAP_MASK) {
873 case PCIM_HTCAP_MSI_MAPPING:
874 if (!(val & PCIM_HTCMD_MSI_FIXED)) {
875 /* Sanity check the mapping window. */
876 addr = REG(ptr + PCIR_HTMSI_ADDRESS_HI,
879 addr |= REG(ptr + PCIR_HTMSI_ADDRESS_LO,
881 if (addr != MSI_INTEL_ADDR_BASE)
883 "HT device at pci%d:%d:%d:%d has non-default MSI window 0x%llx\n",
884 cfg->domain, cfg->bus,
885 cfg->slot, cfg->func,
888 addr = MSI_INTEL_ADDR_BASE;
890 cfg->ht.ht_msimap = ptr;
891 cfg->ht.ht_msictrl = val;
892 cfg->ht.ht_msiaddr = addr;
897 case PCIY_MSI: /* PCI MSI */
898 cfg->msi.msi_location = ptr;
899 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2);
900 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl &
901 PCIM_MSICTRL_MMC_MASK)>>1);
903 case PCIY_MSIX: /* PCI MSI-X */
904 cfg->msix.msix_location = ptr;
905 cfg->msix.msix_ctrl = REG(ptr + PCIR_MSIX_CTRL, 2);
906 cfg->msix.msix_msgnum = (cfg->msix.msix_ctrl &
907 PCIM_MSIXCTRL_TABLE_SIZE) + 1;
908 val = REG(ptr + PCIR_MSIX_TABLE, 4);
909 cfg->msix.msix_table_bar = PCIR_BAR(val &
911 cfg->msix.msix_table_offset = val & ~PCIM_MSIX_BIR_MASK;
912 val = REG(ptr + PCIR_MSIX_PBA, 4);
913 cfg->msix.msix_pba_bar = PCIR_BAR(val &
915 cfg->msix.msix_pba_offset = val & ~PCIM_MSIX_BIR_MASK;
917 case PCIY_VPD: /* PCI Vital Product Data */
918 cfg->vpd.vpd_reg = ptr;
921 /* Should always be true. */
922 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
923 PCIM_HDRTYPE_BRIDGE) {
924 val = REG(ptr + PCIR_SUBVENDCAP_ID, 4);
925 cfg->subvendor = val & 0xffff;
926 cfg->subdevice = val >> 16;
929 case PCIY_PCIX: /* PCI-X */
931 * Assume we have a PCI-X chipset if we have
932 * at least one PCI-PCI bridge with a PCI-X
933 * capability. Note that some systems with
934 * PCI-express or HT chipsets might match on
935 * this check as well.
937 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
940 cfg->pcix.pcix_location = ptr;
942 case PCIY_EXPRESS: /* PCI-express */
944 * Assume we have a PCI-express chipset if we have
945 * at least one PCI-express device.
948 cfg->pcie.pcie_location = ptr;
949 val = REG(ptr + PCIER_FLAGS, 2);
950 cfg->pcie.pcie_type = val & PCIEM_FLAGS_TYPE;
952 case PCIY_EA: /* Enhanced Allocation */
953 cfg->ea.ea_location = ptr;
954 pci_ea_fill_info(pcib, cfg);
961 #if defined(__powerpc__)
963 * Enable the MSI mapping window for all HyperTransport
964 * slaves. PCI-PCI bridges have their windows enabled via
967 if (cfg->ht.ht_slave != 0 && cfg->ht.ht_msimap != 0 &&
968 !(cfg->ht.ht_msictrl & PCIM_HTCMD_MSI_ENABLE)) {
970 "Enabling MSI window for HyperTransport slave at pci%d:%d:%d:%d\n",
971 cfg->domain, cfg->bus, cfg->slot, cfg->func);
972 cfg->ht.ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
973 WREG(cfg->ht.ht_msimap + PCIR_HT_COMMAND, cfg->ht.ht_msictrl,
977 /* REG and WREG use carry through to next functions */
981 * PCI Vital Product Data
984 #define PCI_VPD_TIMEOUT 1000000
987 pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t *data)
989 int count = PCI_VPD_TIMEOUT;
991 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
993 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg, 2);
995 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) != 0x8000) {
998 DELAY(1); /* limit looping */
1000 *data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4));
1007 pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t data)
1009 int count = PCI_VPD_TIMEOUT;
1011 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
1013 WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4);
1014 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg | 0x8000, 2);
1015 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) == 0x8000) {
1018 DELAY(1); /* limit looping */
1025 #undef PCI_VPD_TIMEOUT
1027 struct vpd_readstate {
1037 vpd_nextbyte(struct vpd_readstate *vrs, uint8_t *data)
1042 if (vrs->bytesinval == 0) {
1043 if (pci_read_vpd_reg(vrs->pcib, vrs->cfg, vrs->off, ®))
1045 vrs->val = le32toh(reg);
1047 byte = vrs->val & 0xff;
1048 vrs->bytesinval = 3;
1050 vrs->val = vrs->val >> 8;
1051 byte = vrs->val & 0xff;
1061 pci_read_vpd(device_t pcib, pcicfgregs *cfg)
1063 struct vpd_readstate vrs;
1068 int alloc, off; /* alloc/off for RO/W arrays */
1074 /* init vpd reader */
1082 name = remain = i = 0; /* shut up stupid gcc */
1083 alloc = off = 0; /* shut up stupid gcc */
1084 dflen = 0; /* shut up stupid gcc */
1086 while (state >= 0) {
1087 if (vpd_nextbyte(&vrs, &byte)) {
1092 printf("vpd: val: %#x, off: %d, bytesinval: %d, byte: %#hhx, " \
1093 "state: %d, remain: %d, name: %#x, i: %d\n", vrs.val,
1094 vrs.off, vrs.bytesinval, byte, state, remain, name, i);
1097 case 0: /* item name */
1099 if (vpd_nextbyte(&vrs, &byte2)) {
1104 if (vpd_nextbyte(&vrs, &byte2)) {
1108 remain |= byte2 << 8;
1111 remain = byte & 0x7;
1112 name = (byte >> 3) & 0xf;
1114 if (vrs.off + remain - vrs.bytesinval > 0x8000) {
1116 "VPD data overflow, remain %#x\n", remain);
1121 case 0x2: /* String */
1122 cfg->vpd.vpd_ident = malloc(remain + 1,
1123 M_DEVBUF, M_WAITOK);
1130 case 0x10: /* VPD-R */
1133 cfg->vpd.vpd_ros = malloc(alloc *
1134 sizeof(*cfg->vpd.vpd_ros), M_DEVBUF,
1138 case 0x11: /* VPD-W */
1141 cfg->vpd.vpd_w = malloc(alloc *
1142 sizeof(*cfg->vpd.vpd_w), M_DEVBUF,
1146 default: /* Invalid data, abort */
1152 case 1: /* Identifier String */
1153 cfg->vpd.vpd_ident[i++] = byte;
1156 cfg->vpd.vpd_ident[i] = '\0';
1161 case 2: /* VPD-R Keyword Header */
1163 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1164 (alloc *= 2) * sizeof(*cfg->vpd.vpd_ros),
1165 M_DEVBUF, M_WAITOK | M_ZERO);
1167 cfg->vpd.vpd_ros[off].keyword[0] = byte;
1168 if (vpd_nextbyte(&vrs, &byte2)) {
1172 cfg->vpd.vpd_ros[off].keyword[1] = byte2;
1173 if (vpd_nextbyte(&vrs, &byte2)) {
1177 cfg->vpd.vpd_ros[off].len = dflen = byte2;
1179 strncmp(cfg->vpd.vpd_ros[off].keyword, "RV",
1182 * if this happens, we can't trust the rest
1185 pci_printf(cfg, "bad keyword length: %d\n",
1190 } else if (dflen == 0) {
1191 cfg->vpd.vpd_ros[off].value = malloc(1 *
1192 sizeof(*cfg->vpd.vpd_ros[off].value),
1193 M_DEVBUF, M_WAITOK);
1194 cfg->vpd.vpd_ros[off].value[0] = '\x00';
1196 cfg->vpd.vpd_ros[off].value = malloc(
1198 sizeof(*cfg->vpd.vpd_ros[off].value),
1199 M_DEVBUF, M_WAITOK);
1202 /* keep in sync w/ state 3's transistions */
1203 if (dflen == 0 && remain == 0)
1205 else if (dflen == 0)
1211 case 3: /* VPD-R Keyword Value */
1212 cfg->vpd.vpd_ros[off].value[i++] = byte;
1213 if (strncmp(cfg->vpd.vpd_ros[off].keyword,
1214 "RV", 2) == 0 && cksumvalid == -1) {
1220 "bad VPD cksum, remain %hhu\n",
1229 /* keep in sync w/ state 2's transistions */
1231 cfg->vpd.vpd_ros[off++].value[i++] = '\0';
1232 if (dflen == 0 && remain == 0) {
1233 cfg->vpd.vpd_rocnt = off;
1234 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1235 off * sizeof(*cfg->vpd.vpd_ros),
1236 M_DEVBUF, M_WAITOK | M_ZERO);
1238 } else if (dflen == 0)
1248 case 5: /* VPD-W Keyword Header */
1250 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1251 (alloc *= 2) * sizeof(*cfg->vpd.vpd_w),
1252 M_DEVBUF, M_WAITOK | M_ZERO);
1254 cfg->vpd.vpd_w[off].keyword[0] = byte;
1255 if (vpd_nextbyte(&vrs, &byte2)) {
1259 cfg->vpd.vpd_w[off].keyword[1] = byte2;
1260 if (vpd_nextbyte(&vrs, &byte2)) {
1264 cfg->vpd.vpd_w[off].len = dflen = byte2;
1265 cfg->vpd.vpd_w[off].start = vrs.off - vrs.bytesinval;
1266 cfg->vpd.vpd_w[off].value = malloc((dflen + 1) *
1267 sizeof(*cfg->vpd.vpd_w[off].value),
1268 M_DEVBUF, M_WAITOK);
1271 /* keep in sync w/ state 6's transistions */
1272 if (dflen == 0 && remain == 0)
1274 else if (dflen == 0)
1280 case 6: /* VPD-W Keyword Value */
1281 cfg->vpd.vpd_w[off].value[i++] = byte;
1284 /* keep in sync w/ state 5's transistions */
1286 cfg->vpd.vpd_w[off++].value[i++] = '\0';
1287 if (dflen == 0 && remain == 0) {
1288 cfg->vpd.vpd_wcnt = off;
1289 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1290 off * sizeof(*cfg->vpd.vpd_w),
1291 M_DEVBUF, M_WAITOK | M_ZERO);
1293 } else if (dflen == 0)
1298 pci_printf(cfg, "invalid state: %d\n", state);
1304 if (cksumvalid == 0 || state < -1) {
1305 /* read-only data bad, clean up */
1306 if (cfg->vpd.vpd_ros != NULL) {
1307 for (off = 0; cfg->vpd.vpd_ros[off].value; off++)
1308 free(cfg->vpd.vpd_ros[off].value, M_DEVBUF);
1309 free(cfg->vpd.vpd_ros, M_DEVBUF);
1310 cfg->vpd.vpd_ros = NULL;
1314 /* I/O error, clean up */
1315 pci_printf(cfg, "failed to read VPD data.\n");
1316 if (cfg->vpd.vpd_ident != NULL) {
1317 free(cfg->vpd.vpd_ident, M_DEVBUF);
1318 cfg->vpd.vpd_ident = NULL;
1320 if (cfg->vpd.vpd_w != NULL) {
1321 for (off = 0; cfg->vpd.vpd_w[off].value; off++)
1322 free(cfg->vpd.vpd_w[off].value, M_DEVBUF);
1323 free(cfg->vpd.vpd_w, M_DEVBUF);
1324 cfg->vpd.vpd_w = NULL;
1327 cfg->vpd.vpd_cached = 1;
1333 pci_get_vpd_ident_method(device_t dev, device_t child, const char **identptr)
1335 struct pci_devinfo *dinfo = device_get_ivars(child);
1336 pcicfgregs *cfg = &dinfo->cfg;
1338 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1339 pci_read_vpd(device_get_parent(dev), cfg);
1341 *identptr = cfg->vpd.vpd_ident;
1343 if (*identptr == NULL)
1350 pci_get_vpd_readonly_method(device_t dev, device_t child, const char *kw,
1353 struct pci_devinfo *dinfo = device_get_ivars(child);
1354 pcicfgregs *cfg = &dinfo->cfg;
1357 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1358 pci_read_vpd(device_get_parent(dev), cfg);
1360 for (i = 0; i < cfg->vpd.vpd_rocnt; i++)
1361 if (memcmp(kw, cfg->vpd.vpd_ros[i].keyword,
1362 sizeof(cfg->vpd.vpd_ros[i].keyword)) == 0) {
1363 *vptr = cfg->vpd.vpd_ros[i].value;
1372 pci_fetch_vpd_list(device_t dev)
1374 struct pci_devinfo *dinfo = device_get_ivars(dev);
1375 pcicfgregs *cfg = &dinfo->cfg;
1377 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1378 pci_read_vpd(device_get_parent(device_get_parent(dev)), cfg);
1383 * Find the requested HyperTransport capability and return the offset
1384 * in configuration space via the pointer provided. The function
1385 * returns 0 on success and an error code otherwise.
1388 pci_find_htcap_method(device_t dev, device_t child, int capability, int *capreg)
1393 error = pci_find_cap(child, PCIY_HT, &ptr);
1398 * Traverse the capabilities list checking each HT capability
1399 * to see if it matches the requested HT capability.
1402 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1403 if (capability == PCIM_HTCAP_SLAVE ||
1404 capability == PCIM_HTCAP_HOST)
1407 val &= PCIM_HTCMD_CAP_MASK;
1408 if (val == capability) {
1414 /* Skip to the next HT capability. */
1415 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1423 * Find the next requested HyperTransport capability after start and return
1424 * the offset in configuration space via the pointer provided. The function
1425 * returns 0 on success and an error code otherwise.
1428 pci_find_next_htcap_method(device_t dev, device_t child, int capability,
1429 int start, int *capreg)
1434 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == PCIY_HT,
1435 ("start capability is not HyperTransport capability"));
1439 * Traverse the capabilities list checking each HT capability
1440 * to see if it matches the requested HT capability.
1443 /* Skip to the next HT capability. */
1444 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1447 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1448 if (capability == PCIM_HTCAP_SLAVE ||
1449 capability == PCIM_HTCAP_HOST)
1452 val &= PCIM_HTCMD_CAP_MASK;
1453 if (val == capability) {
1464 * Find the requested capability and return the offset in
1465 * configuration space via the pointer provided. The function returns
1466 * 0 on success and an error code otherwise.
1469 pci_find_cap_method(device_t dev, device_t child, int capability,
1472 struct pci_devinfo *dinfo = device_get_ivars(child);
1473 pcicfgregs *cfg = &dinfo->cfg;
1478 * Check the CAP_LIST bit of the PCI status register first.
1480 status = pci_read_config(child, PCIR_STATUS, 2);
1481 if (!(status & PCIM_STATUS_CAPPRESENT))
1485 * Determine the start pointer of the capabilities list.
1487 switch (cfg->hdrtype & PCIM_HDRTYPE) {
1488 case PCIM_HDRTYPE_NORMAL:
1489 case PCIM_HDRTYPE_BRIDGE:
1492 case PCIM_HDRTYPE_CARDBUS:
1493 ptr = PCIR_CAP_PTR_2;
1497 return (ENXIO); /* no extended capabilities support */
1499 ptr = pci_read_config(child, ptr, 1);
1502 * Traverse the capabilities list.
1505 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1510 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1517 * Find the next requested capability after start and return the offset in
1518 * configuration space via the pointer provided. The function returns
1519 * 0 on success and an error code otherwise.
1522 pci_find_next_cap_method(device_t dev, device_t child, int capability,
1523 int start, int *capreg)
1527 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == capability,
1528 ("start capability is not expected capability"));
1530 ptr = pci_read_config(child, start + PCICAP_NEXTPTR, 1);
1532 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1537 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1544 * Find the requested extended capability and return the offset in
1545 * configuration space via the pointer provided. The function returns
1546 * 0 on success and an error code otherwise.
1549 pci_find_extcap_method(device_t dev, device_t child, int capability,
1552 struct pci_devinfo *dinfo = device_get_ivars(child);
1553 pcicfgregs *cfg = &dinfo->cfg;
1557 /* Only supported for PCI-express devices. */
1558 if (cfg->pcie.pcie_location == 0)
1562 ecap = pci_read_config(child, ptr, 4);
1563 if (ecap == 0xffffffff || ecap == 0)
1566 if (PCI_EXTCAP_ID(ecap) == capability) {
1571 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1574 ecap = pci_read_config(child, ptr, 4);
1581 * Find the next requested extended capability after start and return the
1582 * offset in configuration space via the pointer provided. The function
1583 * returns 0 on success and an error code otherwise.
1586 pci_find_next_extcap_method(device_t dev, device_t child, int capability,
1587 int start, int *capreg)
1589 struct pci_devinfo *dinfo = device_get_ivars(child);
1590 pcicfgregs *cfg = &dinfo->cfg;
1594 /* Only supported for PCI-express devices. */
1595 if (cfg->pcie.pcie_location == 0)
1598 ecap = pci_read_config(child, start, 4);
1599 KASSERT(PCI_EXTCAP_ID(ecap) == capability,
1600 ("start extended capability is not expected capability"));
1601 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1603 ecap = pci_read_config(child, ptr, 4);
1604 if (PCI_EXTCAP_ID(ecap) == capability) {
1609 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1616 * Support for MSI-X message interrupts.
1619 pci_write_msix_entry(device_t dev, u_int index, uint64_t address, uint32_t data)
1621 struct pci_devinfo *dinfo = device_get_ivars(dev);
1622 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1625 KASSERT(msix->msix_table_len > index, ("bogus index"));
1626 offset = msix->msix_table_offset + index * 16;
1627 bus_write_4(msix->msix_table_res, offset, address & 0xffffffff);
1628 bus_write_4(msix->msix_table_res, offset + 4, address >> 32);
1629 bus_write_4(msix->msix_table_res, offset + 8, data);
1633 pci_enable_msix_method(device_t dev, device_t child, u_int index,
1634 uint64_t address, uint32_t data)
1637 if (pci_msix_rewrite_table) {
1638 struct pci_devinfo *dinfo = device_get_ivars(child);
1639 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1642 * Some VM hosts require MSIX to be disabled in the
1643 * control register before updating the MSIX table
1644 * entries are allowed. It is not enough to only
1645 * disable MSIX while updating a single entry. MSIX
1646 * must be disabled while updating all entries in the
1649 pci_write_config(child,
1650 msix->msix_location + PCIR_MSIX_CTRL,
1651 msix->msix_ctrl & ~PCIM_MSIXCTRL_MSIX_ENABLE, 2);
1652 pci_resume_msix(child);
1654 pci_write_msix_entry(child, index, address, data);
1656 /* Enable MSI -> HT mapping. */
1657 pci_ht_map_msi(child, address);
1661 pci_mask_msix(device_t dev, u_int index)
1663 struct pci_devinfo *dinfo = device_get_ivars(dev);
1664 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1665 uint32_t offset, val;
1667 KASSERT(msix->msix_msgnum > index, ("bogus index"));
1668 offset = msix->msix_table_offset + index * 16 + 12;
1669 val = bus_read_4(msix->msix_table_res, offset);
1670 val |= PCIM_MSIX_VCTRL_MASK;
1673 * Some devices (e.g. Samsung PM961) do not support reads of this
1674 * register, so always write the new value.
1676 bus_write_4(msix->msix_table_res, offset, val);
1680 pci_unmask_msix(device_t dev, u_int index)
1682 struct pci_devinfo *dinfo = device_get_ivars(dev);
1683 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1684 uint32_t offset, val;
1686 KASSERT(msix->msix_table_len > index, ("bogus index"));
1687 offset = msix->msix_table_offset + index * 16 + 12;
1688 val = bus_read_4(msix->msix_table_res, offset);
1689 val &= ~PCIM_MSIX_VCTRL_MASK;
1692 * Some devices (e.g. Samsung PM961) do not support reads of this
1693 * register, so always write the new value.
1695 bus_write_4(msix->msix_table_res, offset, val);
1699 pci_pending_msix(device_t dev, u_int index)
1701 struct pci_devinfo *dinfo = device_get_ivars(dev);
1702 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1703 uint32_t offset, bit;
1705 KASSERT(msix->msix_table_len > index, ("bogus index"));
1706 offset = msix->msix_pba_offset + (index / 32) * 4;
1707 bit = 1 << index % 32;
1708 return (bus_read_4(msix->msix_pba_res, offset) & bit);
1712 * Restore MSI-X registers and table during resume. If MSI-X is
1713 * enabled then walk the virtual table to restore the actual MSI-X
1717 pci_resume_msix(device_t dev)
1719 struct pci_devinfo *dinfo = device_get_ivars(dev);
1720 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1721 struct msix_table_entry *mte;
1722 struct msix_vector *mv;
1725 if (msix->msix_alloc > 0) {
1726 /* First, mask all vectors. */
1727 for (i = 0; i < msix->msix_msgnum; i++)
1728 pci_mask_msix(dev, i);
1730 /* Second, program any messages with at least one handler. */
1731 for (i = 0; i < msix->msix_table_len; i++) {
1732 mte = &msix->msix_table[i];
1733 if (mte->mte_vector == 0 || mte->mte_handlers == 0)
1735 mv = &msix->msix_vectors[mte->mte_vector - 1];
1736 pci_write_msix_entry(dev, i, mv->mv_address,
1738 pci_unmask_msix(dev, i);
1741 pci_write_config(dev, msix->msix_location + PCIR_MSIX_CTRL,
1742 msix->msix_ctrl, 2);
1746 * Attempt to allocate *count MSI-X messages. The actual number allocated is
1747 * returned in *count. After this function returns, each message will be
1748 * available to the driver as SYS_RES_IRQ resources starting at rid 1.
1751 pci_alloc_msix_method(device_t dev, device_t child, int *count)
1753 struct pci_devinfo *dinfo = device_get_ivars(child);
1754 pcicfgregs *cfg = &dinfo->cfg;
1755 struct resource_list_entry *rle;
1756 int actual, error, i, irq, max;
1758 /* Don't let count == 0 get us into trouble. */
1762 /* If rid 0 is allocated, then fail. */
1763 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
1764 if (rle != NULL && rle->res != NULL)
1767 /* Already have allocated messages? */
1768 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
1771 /* If MSI-X is blacklisted for this system, fail. */
1772 if (pci_msix_blacklisted())
1775 /* MSI-X capability present? */
1776 if (cfg->msix.msix_location == 0 || !pci_do_msix)
1779 /* Make sure the appropriate BARs are mapped. */
1780 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1781 cfg->msix.msix_table_bar);
1782 if (rle == NULL || rle->res == NULL ||
1783 !(rman_get_flags(rle->res) & RF_ACTIVE))
1785 cfg->msix.msix_table_res = rle->res;
1786 if (cfg->msix.msix_pba_bar != cfg->msix.msix_table_bar) {
1787 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1788 cfg->msix.msix_pba_bar);
1789 if (rle == NULL || rle->res == NULL ||
1790 !(rman_get_flags(rle->res) & RF_ACTIVE))
1793 cfg->msix.msix_pba_res = rle->res;
1796 device_printf(child,
1797 "attempting to allocate %d MSI-X vectors (%d supported)\n",
1798 *count, cfg->msix.msix_msgnum);
1799 max = min(*count, cfg->msix.msix_msgnum);
1800 for (i = 0; i < max; i++) {
1801 /* Allocate a message. */
1802 error = PCIB_ALLOC_MSIX(device_get_parent(dev), child, &irq);
1808 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
1814 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1);
1816 device_printf(child, "using IRQ %ju for MSI-X\n",
1822 * Be fancy and try to print contiguous runs of
1823 * IRQ values as ranges. 'irq' is the previous IRQ.
1824 * 'run' is true if we are in a range.
1826 device_printf(child, "using IRQs %ju", rle->start);
1829 for (i = 1; i < actual; i++) {
1830 rle = resource_list_find(&dinfo->resources,
1831 SYS_RES_IRQ, i + 1);
1833 /* Still in a run? */
1834 if (rle->start == irq + 1) {
1840 /* Finish previous range. */
1846 /* Start new range. */
1847 printf(",%ju", rle->start);
1851 /* Unfinished range? */
1854 printf(" for MSI-X\n");
1858 /* Mask all vectors. */
1859 for (i = 0; i < cfg->msix.msix_msgnum; i++)
1860 pci_mask_msix(child, i);
1862 /* Allocate and initialize vector data and virtual table. */
1863 cfg->msix.msix_vectors = malloc(sizeof(struct msix_vector) * actual,
1864 M_DEVBUF, M_WAITOK | M_ZERO);
1865 cfg->msix.msix_table = malloc(sizeof(struct msix_table_entry) * actual,
1866 M_DEVBUF, M_WAITOK | M_ZERO);
1867 for (i = 0; i < actual; i++) {
1868 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1869 cfg->msix.msix_vectors[i].mv_irq = rle->start;
1870 cfg->msix.msix_table[i].mte_vector = i + 1;
1873 /* Update control register to enable MSI-X. */
1874 cfg->msix.msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE;
1875 pci_write_config(child, cfg->msix.msix_location + PCIR_MSIX_CTRL,
1876 cfg->msix.msix_ctrl, 2);
1878 /* Update counts of alloc'd messages. */
1879 cfg->msix.msix_alloc = actual;
1880 cfg->msix.msix_table_len = actual;
1886 * By default, pci_alloc_msix() will assign the allocated IRQ
1887 * resources consecutively to the first N messages in the MSI-X table.
1888 * However, device drivers may want to use different layouts if they
1889 * either receive fewer messages than they asked for, or they wish to
1890 * populate the MSI-X table sparsely. This method allows the driver
1891 * to specify what layout it wants. It must be called after a
1892 * successful pci_alloc_msix() but before any of the associated
1893 * SYS_RES_IRQ resources are allocated via bus_alloc_resource().
1895 * The 'vectors' array contains 'count' message vectors. The array
1896 * maps directly to the MSI-X table in that index 0 in the array
1897 * specifies the vector for the first message in the MSI-X table, etc.
1898 * The vector value in each array index can either be 0 to indicate
1899 * that no vector should be assigned to a message slot, or it can be a
1900 * number from 1 to N (where N is the count returned from a
1901 * succcessful call to pci_alloc_msix()) to indicate which message
1902 * vector (IRQ) to be used for the corresponding message.
1904 * On successful return, each message with a non-zero vector will have
1905 * an associated SYS_RES_IRQ whose rid is equal to the array index +
1906 * 1. Additionally, if any of the IRQs allocated via the previous
1907 * call to pci_alloc_msix() are not used in the mapping, those IRQs
1908 * will be freed back to the system automatically.
1910 * For example, suppose a driver has a MSI-X table with 6 messages and
1911 * asks for 6 messages, but pci_alloc_msix() only returns a count of
1912 * 3. Call the three vectors allocated by pci_alloc_msix() A, B, and
1913 * C. After the call to pci_alloc_msix(), the device will be setup to
1914 * have an MSI-X table of ABC--- (where - means no vector assigned).
1915 * If the driver then passes a vector array of { 1, 0, 1, 2, 0, 2 },
1916 * then the MSI-X table will look like A-AB-B, and the 'C' vector will
1917 * be freed back to the system. This device will also have valid
1918 * SYS_RES_IRQ rids of 1, 3, 4, and 6.
1920 * In any case, the SYS_RES_IRQ rid X will always map to the message
1921 * at MSI-X table index X - 1 and will only be valid if a vector is
1922 * assigned to that table entry.
1925 pci_remap_msix_method(device_t dev, device_t child, int count,
1926 const u_int *vectors)
1928 struct pci_devinfo *dinfo = device_get_ivars(child);
1929 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1930 struct resource_list_entry *rle;
1931 int i, irq, j, *used;
1934 * Have to have at least one message in the table but the
1935 * table can't be bigger than the actual MSI-X table in the
1938 if (count == 0 || count > msix->msix_msgnum)
1941 /* Sanity check the vectors. */
1942 for (i = 0; i < count; i++)
1943 if (vectors[i] > msix->msix_alloc)
1947 * Make sure there aren't any holes in the vectors to be used.
1948 * It's a big pain to support it, and it doesn't really make
1949 * sense anyway. Also, at least one vector must be used.
1951 used = malloc(sizeof(int) * msix->msix_alloc, M_DEVBUF, M_WAITOK |
1953 for (i = 0; i < count; i++)
1954 if (vectors[i] != 0)
1955 used[vectors[i] - 1] = 1;
1956 for (i = 0; i < msix->msix_alloc - 1; i++)
1957 if (used[i] == 0 && used[i + 1] == 1) {
1958 free(used, M_DEVBUF);
1962 free(used, M_DEVBUF);
1966 /* Make sure none of the resources are allocated. */
1967 for (i = 0; i < msix->msix_table_len; i++) {
1968 if (msix->msix_table[i].mte_vector == 0)
1970 if (msix->msix_table[i].mte_handlers > 0) {
1971 free(used, M_DEVBUF);
1974 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1975 KASSERT(rle != NULL, ("missing resource"));
1976 if (rle->res != NULL) {
1977 free(used, M_DEVBUF);
1982 /* Free the existing resource list entries. */
1983 for (i = 0; i < msix->msix_table_len; i++) {
1984 if (msix->msix_table[i].mte_vector == 0)
1986 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
1990 * Build the new virtual table keeping track of which vectors are
1993 free(msix->msix_table, M_DEVBUF);
1994 msix->msix_table = malloc(sizeof(struct msix_table_entry) * count,
1995 M_DEVBUF, M_WAITOK | M_ZERO);
1996 for (i = 0; i < count; i++)
1997 msix->msix_table[i].mte_vector = vectors[i];
1998 msix->msix_table_len = count;
2000 /* Free any unused IRQs and resize the vectors array if necessary. */
2001 j = msix->msix_alloc - 1;
2003 struct msix_vector *vec;
2005 while (used[j] == 0) {
2006 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2007 msix->msix_vectors[j].mv_irq);
2010 vec = malloc(sizeof(struct msix_vector) * (j + 1), M_DEVBUF,
2012 bcopy(msix->msix_vectors, vec, sizeof(struct msix_vector) *
2014 free(msix->msix_vectors, M_DEVBUF);
2015 msix->msix_vectors = vec;
2016 msix->msix_alloc = j + 1;
2018 free(used, M_DEVBUF);
2020 /* Map the IRQs onto the rids. */
2021 for (i = 0; i < count; i++) {
2022 if (vectors[i] == 0)
2024 irq = msix->msix_vectors[vectors[i] - 1].mv_irq;
2025 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
2030 device_printf(child, "Remapped MSI-X IRQs as: ");
2031 for (i = 0; i < count; i++) {
2034 if (vectors[i] == 0)
2038 msix->msix_vectors[vectors[i] - 1].mv_irq);
2047 pci_release_msix(device_t dev, device_t child)
2049 struct pci_devinfo *dinfo = device_get_ivars(child);
2050 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2051 struct resource_list_entry *rle;
2054 /* Do we have any messages to release? */
2055 if (msix->msix_alloc == 0)
2058 /* Make sure none of the resources are allocated. */
2059 for (i = 0; i < msix->msix_table_len; i++) {
2060 if (msix->msix_table[i].mte_vector == 0)
2062 if (msix->msix_table[i].mte_handlers > 0)
2064 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2065 KASSERT(rle != NULL, ("missing resource"));
2066 if (rle->res != NULL)
2070 /* Update control register to disable MSI-X. */
2071 msix->msix_ctrl &= ~PCIM_MSIXCTRL_MSIX_ENABLE;
2072 pci_write_config(child, msix->msix_location + PCIR_MSIX_CTRL,
2073 msix->msix_ctrl, 2);
2075 /* Free the resource list entries. */
2076 for (i = 0; i < msix->msix_table_len; i++) {
2077 if (msix->msix_table[i].mte_vector == 0)
2079 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2081 free(msix->msix_table, M_DEVBUF);
2082 msix->msix_table_len = 0;
2084 /* Release the IRQs. */
2085 for (i = 0; i < msix->msix_alloc; i++)
2086 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2087 msix->msix_vectors[i].mv_irq);
2088 free(msix->msix_vectors, M_DEVBUF);
2089 msix->msix_alloc = 0;
2094 * Return the max supported MSI-X messages this device supports.
2095 * Basically, assuming the MD code can alloc messages, this function
2096 * should return the maximum value that pci_alloc_msix() can return.
2097 * Thus, it is subject to the tunables, etc.
2100 pci_msix_count_method(device_t dev, device_t child)
2102 struct pci_devinfo *dinfo = device_get_ivars(child);
2103 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2105 if (pci_do_msix && msix->msix_location != 0)
2106 return (msix->msix_msgnum);
2111 pci_msix_pba_bar_method(device_t dev, device_t child)
2113 struct pci_devinfo *dinfo = device_get_ivars(child);
2114 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2116 if (pci_do_msix && msix->msix_location != 0)
2117 return (msix->msix_pba_bar);
2122 pci_msix_table_bar_method(device_t dev, device_t child)
2124 struct pci_devinfo *dinfo = device_get_ivars(child);
2125 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2127 if (pci_do_msix && msix->msix_location != 0)
2128 return (msix->msix_table_bar);
2133 * HyperTransport MSI mapping control
2136 pci_ht_map_msi(device_t dev, uint64_t addr)
2138 struct pci_devinfo *dinfo = device_get_ivars(dev);
2139 struct pcicfg_ht *ht = &dinfo->cfg.ht;
2144 if (addr && !(ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) &&
2145 ht->ht_msiaddr >> 20 == addr >> 20) {
2146 /* Enable MSI -> HT mapping. */
2147 ht->ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
2148 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2152 if (!addr && ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) {
2153 /* Disable MSI -> HT mapping. */
2154 ht->ht_msictrl &= ~PCIM_HTCMD_MSI_ENABLE;
2155 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2161 pci_get_max_payload(device_t dev)
2163 struct pci_devinfo *dinfo = device_get_ivars(dev);
2167 cap = dinfo->cfg.pcie.pcie_location;
2170 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2171 val &= PCIEM_CTL_MAX_PAYLOAD;
2173 return (1 << (val + 7));
2177 pci_get_max_read_req(device_t dev)
2179 struct pci_devinfo *dinfo = device_get_ivars(dev);
2183 cap = dinfo->cfg.pcie.pcie_location;
2186 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2187 val &= PCIEM_CTL_MAX_READ_REQUEST;
2189 return (1 << (val + 7));
2193 pci_set_max_read_req(device_t dev, int size)
2195 struct pci_devinfo *dinfo = device_get_ivars(dev);
2199 cap = dinfo->cfg.pcie.pcie_location;
2206 size = (1 << (fls(size) - 1));
2207 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2208 val &= ~PCIEM_CTL_MAX_READ_REQUEST;
2209 val |= (fls(size) - 8) << 12;
2210 pci_write_config(dev, cap + PCIER_DEVICE_CTL, val, 2);
2215 pcie_read_config(device_t dev, int reg, int width)
2217 struct pci_devinfo *dinfo = device_get_ivars(dev);
2220 cap = dinfo->cfg.pcie.pcie_location;
2224 return (0xffffffff);
2227 return (pci_read_config(dev, cap + reg, width));
2231 pcie_write_config(device_t dev, int reg, uint32_t value, int width)
2233 struct pci_devinfo *dinfo = device_get_ivars(dev);
2236 cap = dinfo->cfg.pcie.pcie_location;
2239 pci_write_config(dev, cap + reg, value, width);
2243 * Adjusts a PCI-e capability register by clearing the bits in mask
2244 * and setting the bits in (value & mask). Bits not set in mask are
2247 * Returns the old value on success or all ones on failure.
2250 pcie_adjust_config(device_t dev, int reg, uint32_t mask, uint32_t value,
2253 struct pci_devinfo *dinfo = device_get_ivars(dev);
2257 cap = dinfo->cfg.pcie.pcie_location;
2261 return (0xffffffff);
2264 old = pci_read_config(dev, cap + reg, width);
2266 new |= (value & mask);
2267 pci_write_config(dev, cap + reg, new, width);
2272 * Support for MSI message signalled interrupts.
2275 pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
2278 struct pci_devinfo *dinfo = device_get_ivars(child);
2279 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2281 /* Write data and address values. */
2282 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR,
2283 address & 0xffffffff, 4);
2284 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2285 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR_HIGH,
2287 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA_64BIT,
2290 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA, data,
2293 /* Enable MSI in the control register. */
2294 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
2295 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2298 /* Enable MSI -> HT mapping. */
2299 pci_ht_map_msi(child, address);
2303 pci_disable_msi_method(device_t dev, device_t child)
2305 struct pci_devinfo *dinfo = device_get_ivars(child);
2306 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2308 /* Disable MSI -> HT mapping. */
2309 pci_ht_map_msi(child, 0);
2311 /* Disable MSI in the control register. */
2312 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
2313 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2318 * Restore MSI registers during resume. If MSI is enabled then
2319 * restore the data and address registers in addition to the control
2323 pci_resume_msi(device_t dev)
2325 struct pci_devinfo *dinfo = device_get_ivars(dev);
2326 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2330 if (msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE) {
2331 address = msi->msi_addr;
2332 data = msi->msi_data;
2333 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR,
2334 address & 0xffffffff, 4);
2335 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2336 pci_write_config(dev, msi->msi_location +
2337 PCIR_MSI_ADDR_HIGH, address >> 32, 4);
2338 pci_write_config(dev, msi->msi_location +
2339 PCIR_MSI_DATA_64BIT, data, 2);
2341 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA,
2344 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl,
2349 pci_remap_intr_method(device_t bus, device_t dev, u_int irq)
2351 struct pci_devinfo *dinfo = device_get_ivars(dev);
2352 pcicfgregs *cfg = &dinfo->cfg;
2353 struct resource_list_entry *rle;
2354 struct msix_table_entry *mte;
2355 struct msix_vector *mv;
2361 * Handle MSI first. We try to find this IRQ among our list
2362 * of MSI IRQs. If we find it, we request updated address and
2363 * data registers and apply the results.
2365 if (cfg->msi.msi_alloc > 0) {
2367 /* If we don't have any active handlers, nothing to do. */
2368 if (cfg->msi.msi_handlers == 0)
2370 for (i = 0; i < cfg->msi.msi_alloc; i++) {
2371 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ,
2373 if (rle->start == irq) {
2374 error = PCIB_MAP_MSI(device_get_parent(bus),
2375 dev, irq, &addr, &data);
2378 pci_disable_msi(dev);
2379 dinfo->cfg.msi.msi_addr = addr;
2380 dinfo->cfg.msi.msi_data = data;
2381 pci_enable_msi(dev, addr, data);
2389 * For MSI-X, we check to see if we have this IRQ. If we do,
2390 * we request the updated mapping info. If that works, we go
2391 * through all the slots that use this IRQ and update them.
2393 if (cfg->msix.msix_alloc > 0) {
2394 for (i = 0; i < cfg->msix.msix_alloc; i++) {
2395 mv = &cfg->msix.msix_vectors[i];
2396 if (mv->mv_irq == irq) {
2397 error = PCIB_MAP_MSI(device_get_parent(bus),
2398 dev, irq, &addr, &data);
2401 mv->mv_address = addr;
2403 for (j = 0; j < cfg->msix.msix_table_len; j++) {
2404 mte = &cfg->msix.msix_table[j];
2405 if (mte->mte_vector != i + 1)
2407 if (mte->mte_handlers == 0)
2409 pci_mask_msix(dev, j);
2410 pci_enable_msix(dev, j, addr, data);
2411 pci_unmask_msix(dev, j);
2422 * Returns true if the specified device is blacklisted because MSI
2426 pci_msi_device_blacklisted(device_t dev)
2429 if (!pci_honor_msi_blacklist)
2432 return (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSI));
2436 * Determine if MSI is blacklisted globally on this system. Currently,
2437 * we just check for blacklisted chipsets as represented by the
2438 * host-PCI bridge at device 0:0:0. In the future, it may become
2439 * necessary to check other system attributes, such as the kenv values
2440 * that give the motherboard manufacturer and model number.
2443 pci_msi_blacklisted(void)
2447 if (!pci_honor_msi_blacklist)
2450 /* Blacklist all non-PCI-express and non-PCI-X chipsets. */
2451 if (!(pcie_chipset || pcix_chipset)) {
2452 if (vm_guest != VM_GUEST_NO) {
2454 * Whitelist older chipsets in virtual
2455 * machines known to support MSI.
2457 dev = pci_find_bsf(0, 0, 0);
2459 return (!pci_has_quirk(pci_get_devid(dev),
2460 PCI_QUIRK_ENABLE_MSI_VM));
2465 dev = pci_find_bsf(0, 0, 0);
2467 return (pci_msi_device_blacklisted(dev));
2472 * Returns true if the specified device is blacklisted because MSI-X
2473 * doesn't work. Note that this assumes that if MSI doesn't work,
2474 * MSI-X doesn't either.
2477 pci_msix_device_blacklisted(device_t dev)
2480 if (!pci_honor_msi_blacklist)
2483 if (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSIX))
2486 return (pci_msi_device_blacklisted(dev));
2490 * Determine if MSI-X is blacklisted globally on this system. If MSI
2491 * is blacklisted, assume that MSI-X is as well. Check for additional
2492 * chipsets where MSI works but MSI-X does not.
2495 pci_msix_blacklisted(void)
2499 if (!pci_honor_msi_blacklist)
2502 dev = pci_find_bsf(0, 0, 0);
2503 if (dev != NULL && pci_has_quirk(pci_get_devid(dev),
2504 PCI_QUIRK_DISABLE_MSIX))
2507 return (pci_msi_blacklisted());
2511 * Attempt to allocate *count MSI messages. The actual number allocated is
2512 * returned in *count. After this function returns, each message will be
2513 * available to the driver as SYS_RES_IRQ resources starting at a rid 1.
2516 pci_alloc_msi_method(device_t dev, device_t child, int *count)
2518 struct pci_devinfo *dinfo = device_get_ivars(child);
2519 pcicfgregs *cfg = &dinfo->cfg;
2520 struct resource_list_entry *rle;
2521 int actual, error, i, irqs[32];
2524 /* Don't let count == 0 get us into trouble. */
2528 /* If rid 0 is allocated, then fail. */
2529 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
2530 if (rle != NULL && rle->res != NULL)
2533 /* Already have allocated messages? */
2534 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
2537 /* If MSI is blacklisted for this system, fail. */
2538 if (pci_msi_blacklisted())
2541 /* MSI capability present? */
2542 if (cfg->msi.msi_location == 0 || !pci_do_msi)
2546 device_printf(child,
2547 "attempting to allocate %d MSI vectors (%d supported)\n",
2548 *count, cfg->msi.msi_msgnum);
2550 /* Don't ask for more than the device supports. */
2551 actual = min(*count, cfg->msi.msi_msgnum);
2553 /* Don't ask for more than 32 messages. */
2554 actual = min(actual, 32);
2556 /* MSI requires power of 2 number of messages. */
2557 if (!powerof2(actual))
2561 /* Try to allocate N messages. */
2562 error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual,
2574 * We now have N actual messages mapped onto SYS_RES_IRQ
2575 * resources in the irqs[] array, so add new resources
2576 * starting at rid 1.
2578 for (i = 0; i < actual; i++)
2579 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1,
2580 irqs[i], irqs[i], 1);
2584 device_printf(child, "using IRQ %d for MSI\n", irqs[0]);
2589 * Be fancy and try to print contiguous runs
2590 * of IRQ values as ranges. 'run' is true if
2591 * we are in a range.
2593 device_printf(child, "using IRQs %d", irqs[0]);
2595 for (i = 1; i < actual; i++) {
2597 /* Still in a run? */
2598 if (irqs[i] == irqs[i - 1] + 1) {
2603 /* Finish previous range. */
2605 printf("-%d", irqs[i - 1]);
2609 /* Start new range. */
2610 printf(",%d", irqs[i]);
2613 /* Unfinished range? */
2615 printf("-%d", irqs[actual - 1]);
2616 printf(" for MSI\n");
2620 /* Update control register with actual count. */
2621 ctrl = cfg->msi.msi_ctrl;
2622 ctrl &= ~PCIM_MSICTRL_MME_MASK;
2623 ctrl |= (ffs(actual) - 1) << 4;
2624 cfg->msi.msi_ctrl = ctrl;
2625 pci_write_config(child, cfg->msi.msi_location + PCIR_MSI_CTRL, ctrl, 2);
2627 /* Update counts of alloc'd messages. */
2628 cfg->msi.msi_alloc = actual;
2629 cfg->msi.msi_handlers = 0;
2634 /* Release the MSI messages associated with this device. */
2636 pci_release_msi_method(device_t dev, device_t child)
2638 struct pci_devinfo *dinfo = device_get_ivars(child);
2639 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2640 struct resource_list_entry *rle;
2641 int error, i, irqs[32];
2643 /* Try MSI-X first. */
2644 error = pci_release_msix(dev, child);
2645 if (error != ENODEV)
2648 /* Do we have any messages to release? */
2649 if (msi->msi_alloc == 0)
2651 KASSERT(msi->msi_alloc <= 32, ("more than 32 alloc'd messages"));
2653 /* Make sure none of the resources are allocated. */
2654 if (msi->msi_handlers > 0)
2656 for (i = 0; i < msi->msi_alloc; i++) {
2657 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2658 KASSERT(rle != NULL, ("missing MSI resource"));
2659 if (rle->res != NULL)
2661 irqs[i] = rle->start;
2664 /* Update control register with 0 count. */
2665 KASSERT(!(msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE),
2666 ("%s: MSI still enabled", __func__));
2667 msi->msi_ctrl &= ~PCIM_MSICTRL_MME_MASK;
2668 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2671 /* Release the messages. */
2672 PCIB_RELEASE_MSI(device_get_parent(dev), child, msi->msi_alloc, irqs);
2673 for (i = 0; i < msi->msi_alloc; i++)
2674 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2676 /* Update alloc count. */
2684 * Return the max supported MSI messages this device supports.
2685 * Basically, assuming the MD code can alloc messages, this function
2686 * should return the maximum value that pci_alloc_msi() can return.
2687 * Thus, it is subject to the tunables, etc.
2690 pci_msi_count_method(device_t dev, device_t child)
2692 struct pci_devinfo *dinfo = device_get_ivars(child);
2693 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2695 if (pci_do_msi && msi->msi_location != 0)
2696 return (msi->msi_msgnum);
2700 /* free pcicfgregs structure and all depending data structures */
2703 pci_freecfg(struct pci_devinfo *dinfo)
2705 struct devlist *devlist_head;
2706 struct pci_map *pm, *next;
2709 devlist_head = &pci_devq;
2711 if (dinfo->cfg.vpd.vpd_reg) {
2712 free(dinfo->cfg.vpd.vpd_ident, M_DEVBUF);
2713 for (i = 0; i < dinfo->cfg.vpd.vpd_rocnt; i++)
2714 free(dinfo->cfg.vpd.vpd_ros[i].value, M_DEVBUF);
2715 free(dinfo->cfg.vpd.vpd_ros, M_DEVBUF);
2716 for (i = 0; i < dinfo->cfg.vpd.vpd_wcnt; i++)
2717 free(dinfo->cfg.vpd.vpd_w[i].value, M_DEVBUF);
2718 free(dinfo->cfg.vpd.vpd_w, M_DEVBUF);
2720 STAILQ_FOREACH_SAFE(pm, &dinfo->cfg.maps, pm_link, next) {
2723 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links);
2724 free(dinfo, M_DEVBUF);
2726 /* increment the generation count */
2729 /* we're losing one device */
2735 * PCI power manangement
2738 pci_set_powerstate_method(device_t dev, device_t child, int state)
2740 struct pci_devinfo *dinfo = device_get_ivars(child);
2741 pcicfgregs *cfg = &dinfo->cfg;
2743 int oldstate, highest, delay;
2745 if (cfg->pp.pp_cap == 0)
2746 return (EOPNOTSUPP);
2749 * Optimize a no state change request away. While it would be OK to
2750 * write to the hardware in theory, some devices have shown odd
2751 * behavior when going from D3 -> D3.
2753 oldstate = pci_get_powerstate(child);
2754 if (oldstate == state)
2758 * The PCI power management specification states that after a state
2759 * transition between PCI power states, system software must
2760 * guarantee a minimal delay before the function accesses the device.
2761 * Compute the worst case delay that we need to guarantee before we
2762 * access the device. Many devices will be responsive much more
2763 * quickly than this delay, but there are some that don't respond
2764 * instantly to state changes. Transitions to/from D3 state require
2765 * 10ms, while D2 requires 200us, and D0/1 require none. The delay
2766 * is done below with DELAY rather than a sleeper function because
2767 * this function can be called from contexts where we cannot sleep.
2769 highest = (oldstate > state) ? oldstate : state;
2770 if (highest == PCI_POWERSTATE_D3)
2772 else if (highest == PCI_POWERSTATE_D2)
2776 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2)
2777 & ~PCIM_PSTAT_DMASK;
2779 case PCI_POWERSTATE_D0:
2780 status |= PCIM_PSTAT_D0;
2782 case PCI_POWERSTATE_D1:
2783 if ((cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) == 0)
2784 return (EOPNOTSUPP);
2785 status |= PCIM_PSTAT_D1;
2787 case PCI_POWERSTATE_D2:
2788 if ((cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) == 0)
2789 return (EOPNOTSUPP);
2790 status |= PCIM_PSTAT_D2;
2792 case PCI_POWERSTATE_D3:
2793 status |= PCIM_PSTAT_D3;
2800 pci_printf(cfg, "Transition from D%d to D%d\n", oldstate,
2803 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 2);
2810 pci_get_powerstate_method(device_t dev, device_t child)
2812 struct pci_devinfo *dinfo = device_get_ivars(child);
2813 pcicfgregs *cfg = &dinfo->cfg;
2817 if (cfg->pp.pp_cap != 0) {
2818 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2);
2819 switch (status & PCIM_PSTAT_DMASK) {
2821 result = PCI_POWERSTATE_D0;
2824 result = PCI_POWERSTATE_D1;
2827 result = PCI_POWERSTATE_D2;
2830 result = PCI_POWERSTATE_D3;
2833 result = PCI_POWERSTATE_UNKNOWN;
2837 /* No support, device is always at D0 */
2838 result = PCI_POWERSTATE_D0;
2844 * Some convenience functions for PCI device drivers.
2847 static __inline void
2848 pci_set_command_bit(device_t dev, device_t child, uint16_t bit)
2852 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2854 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2857 static __inline void
2858 pci_clear_command_bit(device_t dev, device_t child, uint16_t bit)
2862 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2864 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2868 pci_enable_busmaster_method(device_t dev, device_t child)
2870 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2875 pci_disable_busmaster_method(device_t dev, device_t child)
2877 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2882 pci_enable_io_method(device_t dev, device_t child, int space)
2887 case SYS_RES_IOPORT:
2888 bit = PCIM_CMD_PORTEN;
2890 case SYS_RES_MEMORY:
2891 bit = PCIM_CMD_MEMEN;
2896 pci_set_command_bit(dev, child, bit);
2901 pci_disable_io_method(device_t dev, device_t child, int space)
2906 case SYS_RES_IOPORT:
2907 bit = PCIM_CMD_PORTEN;
2909 case SYS_RES_MEMORY:
2910 bit = PCIM_CMD_MEMEN;
2915 pci_clear_command_bit(dev, child, bit);
2920 * New style pci driver. Parent device is either a pci-host-bridge or a
2921 * pci-pci-bridge. Both kinds are represented by instances of pcib.
2925 pci_print_verbose(struct pci_devinfo *dinfo)
2929 pcicfgregs *cfg = &dinfo->cfg;
2931 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n",
2932 cfg->vendor, cfg->device, cfg->revid);
2933 printf("\tdomain=%d, bus=%d, slot=%d, func=%d\n",
2934 cfg->domain, cfg->bus, cfg->slot, cfg->func);
2935 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n",
2936 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype,
2938 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n",
2939 cfg->cmdreg, cfg->statreg, cfg->cachelnsz);
2940 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n",
2941 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt,
2942 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250);
2943 if (cfg->intpin > 0)
2944 printf("\tintpin=%c, irq=%d\n",
2945 cfg->intpin +'a' -1, cfg->intline);
2946 if (cfg->pp.pp_cap) {
2949 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2);
2950 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n",
2951 cfg->pp.pp_cap & PCIM_PCAP_SPEC,
2952 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "",
2953 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "",
2954 status & PCIM_PSTAT_DMASK);
2956 if (cfg->msi.msi_location) {
2959 ctrl = cfg->msi.msi_ctrl;
2960 printf("\tMSI supports %d message%s%s%s\n",
2961 cfg->msi.msi_msgnum,
2962 (cfg->msi.msi_msgnum == 1) ? "" : "s",
2963 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "",
2964 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":"");
2966 if (cfg->msix.msix_location) {
2967 printf("\tMSI-X supports %d message%s ",
2968 cfg->msix.msix_msgnum,
2969 (cfg->msix.msix_msgnum == 1) ? "" : "s");
2970 if (cfg->msix.msix_table_bar == cfg->msix.msix_pba_bar)
2971 printf("in map 0x%x\n",
2972 cfg->msix.msix_table_bar);
2974 printf("in maps 0x%x and 0x%x\n",
2975 cfg->msix.msix_table_bar,
2976 cfg->msix.msix_pba_bar);
2982 pci_porten(device_t dev)
2984 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_PORTEN) != 0;
2988 pci_memen(device_t dev)
2990 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_MEMEN) != 0;
2994 pci_read_bar(device_t dev, int reg, pci_addr_t *mapp, pci_addr_t *testvalp,
2997 struct pci_devinfo *dinfo;
2998 pci_addr_t map, testval;
3003 * The device ROM BAR is special. It is always a 32-bit
3004 * memory BAR. Bit 0 is special and should not be set when
3007 dinfo = device_get_ivars(dev);
3008 if (PCIR_IS_BIOS(&dinfo->cfg, reg)) {
3009 map = pci_read_config(dev, reg, 4);
3010 pci_write_config(dev, reg, 0xfffffffe, 4);
3011 testval = pci_read_config(dev, reg, 4);
3012 pci_write_config(dev, reg, map, 4);
3014 *testvalp = testval;
3020 map = pci_read_config(dev, reg, 4);
3021 ln2range = pci_maprange(map);
3023 map |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3026 * Disable decoding via the command register before
3027 * determining the BAR's length since we will be placing it in
3030 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3031 pci_write_config(dev, PCIR_COMMAND,
3032 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
3035 * Determine the BAR's length by writing all 1's. The bottom
3036 * log_2(size) bits of the BAR will stick as 0 when we read
3039 * NB: according to the PCI Local Bus Specification, rev. 3.0:
3040 * "Software writes 0FFFFFFFFh to both registers, reads them back,
3041 * and combines the result into a 64-bit value." (section 6.2.5.1)
3043 * Writes to both registers must be performed before attempting to
3044 * read back the size value.
3047 pci_write_config(dev, reg, 0xffffffff, 4);
3048 if (ln2range == 64) {
3049 pci_write_config(dev, reg + 4, 0xffffffff, 4);
3050 testval |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3052 testval |= pci_read_config(dev, reg, 4);
3055 * Restore the original value of the BAR. We may have reprogrammed
3056 * the BAR of the low-level console device and when booting verbose,
3057 * we need the console device addressable.
3059 pci_write_config(dev, reg, map, 4);
3061 pci_write_config(dev, reg + 4, map >> 32, 4);
3062 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3065 *testvalp = testval;
3067 *bar64 = (ln2range == 64);
3071 pci_write_bar(device_t dev, struct pci_map *pm, pci_addr_t base)
3073 struct pci_devinfo *dinfo;
3076 /* The device ROM BAR is always a 32-bit memory BAR. */
3077 dinfo = device_get_ivars(dev);
3078 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3081 ln2range = pci_maprange(pm->pm_value);
3082 pci_write_config(dev, pm->pm_reg, base, 4);
3084 pci_write_config(dev, pm->pm_reg + 4, base >> 32, 4);
3085 pm->pm_value = pci_read_config(dev, pm->pm_reg, 4);
3087 pm->pm_value |= (pci_addr_t)pci_read_config(dev,
3088 pm->pm_reg + 4, 4) << 32;
3092 pci_find_bar(device_t dev, int reg)
3094 struct pci_devinfo *dinfo;
3097 dinfo = device_get_ivars(dev);
3098 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3099 if (pm->pm_reg == reg)
3106 pci_bar_enabled(device_t dev, struct pci_map *pm)
3108 struct pci_devinfo *dinfo;
3111 dinfo = device_get_ivars(dev);
3112 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) &&
3113 !(pm->pm_value & PCIM_BIOS_ENABLE))
3115 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3116 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) || PCI_BAR_MEM(pm->pm_value))
3117 return ((cmd & PCIM_CMD_MEMEN) != 0);
3119 return ((cmd & PCIM_CMD_PORTEN) != 0);
3123 pci_add_bar(device_t dev, int reg, pci_addr_t value, pci_addr_t size)
3125 struct pci_devinfo *dinfo;
3126 struct pci_map *pm, *prev;
3128 dinfo = device_get_ivars(dev);
3129 pm = malloc(sizeof(*pm), M_DEVBUF, M_WAITOK | M_ZERO);
3131 pm->pm_value = value;
3133 STAILQ_FOREACH(prev, &dinfo->cfg.maps, pm_link) {
3134 KASSERT(prev->pm_reg != pm->pm_reg, ("duplicate map %02x",
3136 if (STAILQ_NEXT(prev, pm_link) == NULL ||
3137 STAILQ_NEXT(prev, pm_link)->pm_reg > pm->pm_reg)
3141 STAILQ_INSERT_AFTER(&dinfo->cfg.maps, prev, pm, pm_link);
3143 STAILQ_INSERT_TAIL(&dinfo->cfg.maps, pm, pm_link);
3148 pci_restore_bars(device_t dev)
3150 struct pci_devinfo *dinfo;
3154 dinfo = device_get_ivars(dev);
3155 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3156 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3159 ln2range = pci_maprange(pm->pm_value);
3160 pci_write_config(dev, pm->pm_reg, pm->pm_value, 4);
3162 pci_write_config(dev, pm->pm_reg + 4,
3163 pm->pm_value >> 32, 4);
3168 * Add a resource based on a pci map register. Return 1 if the map
3169 * register is a 32bit map register or 2 if it is a 64bit register.
3172 pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl,
3173 int force, int prefetch)
3176 pci_addr_t base, map, testval;
3177 pci_addr_t start, end, count;
3178 int barlen, basezero, flags, maprange, mapsize, type;
3180 struct resource *res;
3183 * The BAR may already exist if the device is a CardBus card
3184 * whose CIS is stored in this BAR.
3186 pm = pci_find_bar(dev, reg);
3188 maprange = pci_maprange(pm->pm_value);
3189 barlen = maprange == 64 ? 2 : 1;
3193 pci_read_bar(dev, reg, &map, &testval, NULL);
3194 if (PCI_BAR_MEM(map)) {
3195 type = SYS_RES_MEMORY;
3196 if (map & PCIM_BAR_MEM_PREFETCH)
3199 type = SYS_RES_IOPORT;
3200 mapsize = pci_mapsize(testval);
3201 base = pci_mapbase(map);
3202 #ifdef __PCI_BAR_ZERO_VALID
3205 basezero = base == 0;
3207 maprange = pci_maprange(map);
3208 barlen = maprange == 64 ? 2 : 1;
3211 * For I/O registers, if bottom bit is set, and the next bit up
3212 * isn't clear, we know we have a BAR that doesn't conform to the
3213 * spec, so ignore it. Also, sanity check the size of the data
3214 * areas to the type of memory involved. Memory must be at least
3215 * 16 bytes in size, while I/O ranges must be at least 4.
3217 if (PCI_BAR_IO(testval) && (testval & PCIM_BAR_IO_RESERVED) != 0)
3219 if ((type == SYS_RES_MEMORY && mapsize < 4) ||
3220 (type == SYS_RES_IOPORT && mapsize < 2))
3223 /* Save a record of this BAR. */
3224 pm = pci_add_bar(dev, reg, map, mapsize);
3226 printf("\tmap[%02x]: type %s, range %2d, base %#jx, size %2d",
3227 reg, pci_maptype(map), maprange, (uintmax_t)base, mapsize);
3228 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3229 printf(", port disabled\n");
3230 else if (type == SYS_RES_MEMORY && !pci_memen(dev))
3231 printf(", memory disabled\n");
3233 printf(", enabled\n");
3237 * If base is 0, then we have problems if this architecture does
3238 * not allow that. It is best to ignore such entries for the
3239 * moment. These will be allocated later if the driver specifically
3240 * requests them. However, some removable buses look better when
3241 * all resources are allocated, so allow '0' to be overriden.
3243 * Similarly treat maps whose values is the same as the test value
3244 * read back. These maps have had all f's written to them by the
3245 * BIOS in an attempt to disable the resources.
3247 if (!force && (basezero || map == testval))
3249 if ((u_long)base != base) {
3251 "pci%d:%d:%d:%d bar %#x too many address bits",
3252 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev),
3253 pci_get_function(dev), reg);
3258 * This code theoretically does the right thing, but has
3259 * undesirable side effects in some cases where peripherals
3260 * respond oddly to having these bits enabled. Let the user
3261 * be able to turn them off (since pci_enable_io_modes is 1 by
3264 if (pci_enable_io_modes) {
3265 /* Turn on resources that have been left off by a lazy BIOS */
3266 if (type == SYS_RES_IOPORT && !pci_porten(dev)) {
3267 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3268 cmd |= PCIM_CMD_PORTEN;
3269 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3271 if (type == SYS_RES_MEMORY && !pci_memen(dev)) {
3272 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3273 cmd |= PCIM_CMD_MEMEN;
3274 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3277 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3279 if (type == SYS_RES_MEMORY && !pci_memen(dev))
3283 count = (pci_addr_t)1 << mapsize;
3284 flags = RF_ALIGNMENT_LOG2(mapsize);
3286 flags |= RF_PREFETCHABLE;
3287 if (basezero || base == pci_mapbase(testval) || pci_clear_bars) {
3288 start = 0; /* Let the parent decide. */
3292 end = base + count - 1;
3294 resource_list_add(rl, type, reg, start, end, count);
3297 * Try to allocate the resource for this BAR from our parent
3298 * so that this resource range is already reserved. The
3299 * driver for this device will later inherit this resource in
3300 * pci_alloc_resource().
3302 res = resource_list_reserve(rl, bus, dev, type, ®, start, end, count,
3304 if ((pci_do_realloc_bars
3305 || pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_REALLOC_BAR))
3306 && res == NULL && (start != 0 || end != ~0)) {
3308 * If the allocation fails, try to allocate a resource for
3309 * this BAR using any available range. The firmware felt
3310 * it was important enough to assign a resource, so don't
3311 * disable decoding if we can help it.
3313 resource_list_delete(rl, type, reg);
3314 resource_list_add(rl, type, reg, 0, ~0, count);
3315 res = resource_list_reserve(rl, bus, dev, type, ®, 0, ~0,
3320 * If the allocation fails, delete the resource list entry
3321 * and disable decoding for this device.
3323 * If the driver requests this resource in the future,
3324 * pci_reserve_map() will try to allocate a fresh
3327 resource_list_delete(rl, type, reg);
3328 pci_disable_io(dev, type);
3331 "pci%d:%d:%d:%d bar %#x failed to allocate\n",
3332 pci_get_domain(dev), pci_get_bus(dev),
3333 pci_get_slot(dev), pci_get_function(dev), reg);
3335 start = rman_get_start(res);
3336 pci_write_bar(dev, pm, start);
3342 * For ATA devices we need to decide early what addressing mode to use.
3343 * Legacy demands that the primary and secondary ATA ports sits on the
3344 * same addresses that old ISA hardware did. This dictates that we use
3345 * those addresses and ignore the BAR's if we cannot set PCI native
3349 pci_ata_maps(device_t bus, device_t dev, struct resource_list *rl, int force,
3350 uint32_t prefetchmask)
3352 int rid, type, progif;
3354 /* if this device supports PCI native addressing use it */
3355 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3356 if ((progif & 0x8a) == 0x8a) {
3357 if (pci_mapbase(pci_read_config(dev, PCIR_BAR(0), 4)) &&
3358 pci_mapbase(pci_read_config(dev, PCIR_BAR(2), 4))) {
3359 printf("Trying ATA native PCI addressing mode\n");
3360 pci_write_config(dev, PCIR_PROGIF, progif | 0x05, 1);
3364 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3365 type = SYS_RES_IOPORT;
3366 if (progif & PCIP_STORAGE_IDE_MODEPRIM) {
3367 pci_add_map(bus, dev, PCIR_BAR(0), rl, force,
3368 prefetchmask & (1 << 0));
3369 pci_add_map(bus, dev, PCIR_BAR(1), rl, force,
3370 prefetchmask & (1 << 1));
3373 resource_list_add(rl, type, rid, 0x1f0, 0x1f7, 8);
3374 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x1f0,
3377 resource_list_add(rl, type, rid, 0x3f6, 0x3f6, 1);
3378 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x3f6,
3381 if (progif & PCIP_STORAGE_IDE_MODESEC) {
3382 pci_add_map(bus, dev, PCIR_BAR(2), rl, force,
3383 prefetchmask & (1 << 2));
3384 pci_add_map(bus, dev, PCIR_BAR(3), rl, force,
3385 prefetchmask & (1 << 3));
3388 resource_list_add(rl, type, rid, 0x170, 0x177, 8);
3389 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x170,
3392 resource_list_add(rl, type, rid, 0x376, 0x376, 1);
3393 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x376,
3396 pci_add_map(bus, dev, PCIR_BAR(4), rl, force,
3397 prefetchmask & (1 << 4));
3398 pci_add_map(bus, dev, PCIR_BAR(5), rl, force,
3399 prefetchmask & (1 << 5));
3403 pci_assign_interrupt(device_t bus, device_t dev, int force_route)
3405 struct pci_devinfo *dinfo = device_get_ivars(dev);
3406 pcicfgregs *cfg = &dinfo->cfg;
3407 char tunable_name[64];
3410 /* Has to have an intpin to have an interrupt. */
3411 if (cfg->intpin == 0)
3414 /* Let the user override the IRQ with a tunable. */
3415 irq = PCI_INVALID_IRQ;
3416 snprintf(tunable_name, sizeof(tunable_name),
3417 "hw.pci%d.%d.%d.INT%c.irq",
3418 cfg->domain, cfg->bus, cfg->slot, cfg->intpin + 'A' - 1);
3419 if (TUNABLE_INT_FETCH(tunable_name, &irq) && (irq >= 255 || irq <= 0))
3420 irq = PCI_INVALID_IRQ;
3423 * If we didn't get an IRQ via the tunable, then we either use the
3424 * IRQ value in the intline register or we ask the bus to route an
3425 * interrupt for us. If force_route is true, then we only use the
3426 * value in the intline register if the bus was unable to assign an
3429 if (!PCI_INTERRUPT_VALID(irq)) {
3430 if (!PCI_INTERRUPT_VALID(cfg->intline) || force_route)
3431 irq = PCI_ASSIGN_INTERRUPT(bus, dev);
3432 if (!PCI_INTERRUPT_VALID(irq))
3436 /* If after all that we don't have an IRQ, just bail. */
3437 if (!PCI_INTERRUPT_VALID(irq))
3440 /* Update the config register if it changed. */
3441 if (irq != cfg->intline) {
3443 pci_write_config(dev, PCIR_INTLINE, irq, 1);
3446 /* Add this IRQ as rid 0 interrupt resource. */
3447 resource_list_add(&dinfo->resources, SYS_RES_IRQ, 0, irq, irq, 1);
3450 /* Perform early OHCI takeover from SMM. */
3452 ohci_early_takeover(device_t self)
3454 struct resource *res;
3460 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3464 ctl = bus_read_4(res, OHCI_CONTROL);
3465 if (ctl & OHCI_IR) {
3467 printf("ohci early: "
3468 "SMM active, request owner change\n");
3469 bus_write_4(res, OHCI_COMMAND_STATUS, OHCI_OCR);
3470 for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) {
3472 ctl = bus_read_4(res, OHCI_CONTROL);
3474 if (ctl & OHCI_IR) {
3476 printf("ohci early: "
3477 "SMM does not respond, resetting\n");
3478 bus_write_4(res, OHCI_CONTROL, OHCI_HCFS_RESET);
3480 /* Disable interrupts */
3481 bus_write_4(res, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS);
3484 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3487 /* Perform early UHCI takeover from SMM. */
3489 uhci_early_takeover(device_t self)
3491 struct resource *res;
3495 * Set the PIRQD enable bit and switch off all the others. We don't
3496 * want legacy support to interfere with us XXX Does this also mean
3497 * that the BIOS won't touch the keyboard anymore if it is connected
3498 * to the ports of the root hub?
3500 pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2);
3502 /* Disable interrupts */
3503 rid = PCI_UHCI_BASE_REG;
3504 res = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE);
3506 bus_write_2(res, UHCI_INTR, 0);
3507 bus_release_resource(self, SYS_RES_IOPORT, rid, res);
3511 /* Perform early EHCI takeover from SMM. */
3513 ehci_early_takeover(device_t self)
3515 struct resource *res;
3525 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3529 cparams = bus_read_4(res, EHCI_HCCPARAMS);
3531 /* Synchronise with the BIOS if it owns the controller. */
3532 for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
3533 eecp = EHCI_EECP_NEXT(eec)) {
3534 eec = pci_read_config(self, eecp, 4);
3535 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
3538 bios_sem = pci_read_config(self, eecp +
3539 EHCI_LEGSUP_BIOS_SEM, 1);
3540 if (bios_sem == 0) {
3544 printf("ehci early: "
3545 "SMM active, request owner change\n");
3547 pci_write_config(self, eecp + EHCI_LEGSUP_OS_SEM, 1, 1);
3549 for (i = 0; (i < 100) && (bios_sem != 0); i++) {
3551 bios_sem = pci_read_config(self, eecp +
3552 EHCI_LEGSUP_BIOS_SEM, 1);
3555 if (bios_sem != 0) {
3557 printf("ehci early: "
3558 "SMM does not respond\n");
3560 /* Disable interrupts */
3561 offs = EHCI_CAPLENGTH(bus_read_4(res, EHCI_CAPLEN_HCIVERSION));
3562 bus_write_4(res, offs + EHCI_USBINTR, 0);
3564 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3567 /* Perform early XHCI takeover from SMM. */
3569 xhci_early_takeover(device_t self)
3571 struct resource *res;
3581 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3585 cparams = bus_read_4(res, XHCI_HCSPARAMS0);
3589 /* Synchronise with the BIOS if it owns the controller. */
3590 for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
3591 eecp += XHCI_XECP_NEXT(eec) << 2) {
3592 eec = bus_read_4(res, eecp);
3594 if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
3597 bios_sem = bus_read_1(res, eecp + XHCI_XECP_BIOS_SEM);
3602 printf("xhci early: "
3603 "SMM active, request owner change\n");
3605 bus_write_1(res, eecp + XHCI_XECP_OS_SEM, 1);
3607 /* wait a maximum of 5 second */
3609 for (i = 0; (i < 5000) && (bios_sem != 0); i++) {
3611 bios_sem = bus_read_1(res, eecp +
3612 XHCI_XECP_BIOS_SEM);
3615 if (bios_sem != 0) {
3617 printf("xhci early: "
3618 "SMM does not respond\n");
3621 /* Disable interrupts */
3622 offs = bus_read_1(res, XHCI_CAPLENGTH);
3623 bus_write_4(res, offs + XHCI_USBCMD, 0);
3624 bus_read_4(res, offs + XHCI_USBSTS);
3626 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3629 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
3631 pci_reserve_secbus(device_t bus, device_t dev, pcicfgregs *cfg,
3632 struct resource_list *rl)
3634 struct resource *res;
3636 rman_res_t start, end, count;
3637 int rid, sec_bus, sec_reg, sub_bus, sub_reg, sup_bus;
3639 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3640 case PCIM_HDRTYPE_BRIDGE:
3641 sec_reg = PCIR_SECBUS_1;
3642 sub_reg = PCIR_SUBBUS_1;
3644 case PCIM_HDRTYPE_CARDBUS:
3645 sec_reg = PCIR_SECBUS_2;
3646 sub_reg = PCIR_SUBBUS_2;
3653 * If the existing bus range is valid, attempt to reserve it
3654 * from our parent. If this fails for any reason, clear the
3655 * secbus and subbus registers.
3657 * XXX: Should we reset sub_bus to sec_bus if it is < sec_bus?
3658 * This would at least preserve the existing sec_bus if it is
3661 sec_bus = PCI_READ_CONFIG(bus, dev, sec_reg, 1);
3662 sub_bus = PCI_READ_CONFIG(bus, dev, sub_reg, 1);
3664 /* Quirk handling. */
3665 switch (pci_get_devid(dev)) {
3666 case 0x12258086: /* Intel 82454KX/GX (Orion) */
3667 sup_bus = pci_read_config(dev, 0x41, 1);
3668 if (sup_bus != 0xff) {
3669 sec_bus = sup_bus + 1;
3670 sub_bus = sup_bus + 1;
3671 PCI_WRITE_CONFIG(bus, dev, sec_reg, sec_bus, 1);
3672 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3677 /* Compaq R3000 BIOS sets wrong subordinate bus number. */
3678 if ((cp = kern_getenv("smbios.planar.maker")) == NULL)
3680 if (strncmp(cp, "Compal", 6) != 0) {
3685 if ((cp = kern_getenv("smbios.planar.product")) == NULL)
3687 if (strncmp(cp, "08A0", 4) != 0) {
3692 if (sub_bus < 0xa) {
3694 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3700 printf("\tsecbus=%d, subbus=%d\n", sec_bus, sub_bus);
3701 if (sec_bus > 0 && sub_bus >= sec_bus) {
3704 count = end - start + 1;
3706 resource_list_add(rl, PCI_RES_BUS, 0, 0, ~0, count);
3709 * If requested, clear secondary bus registers in
3710 * bridge devices to force a complete renumbering
3711 * rather than reserving the existing range. However,
3712 * preserve the existing size.
3714 if (pci_clear_buses)
3718 res = resource_list_reserve(rl, bus, dev, PCI_RES_BUS, &rid,
3719 start, end, count, 0);
3725 "pci%d:%d:%d:%d secbus failed to allocate\n",
3726 pci_get_domain(dev), pci_get_bus(dev),
3727 pci_get_slot(dev), pci_get_function(dev));
3731 PCI_WRITE_CONFIG(bus, dev, sec_reg, 0, 1);
3732 PCI_WRITE_CONFIG(bus, dev, sub_reg, 0, 1);
3735 static struct resource *
3736 pci_alloc_secbus(device_t dev, device_t child, int *rid, rman_res_t start,
3737 rman_res_t end, rman_res_t count, u_int flags)
3739 struct pci_devinfo *dinfo;
3741 struct resource_list *rl;
3742 struct resource *res;
3743 int sec_reg, sub_reg;
3745 dinfo = device_get_ivars(child);
3747 rl = &dinfo->resources;
3748 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3749 case PCIM_HDRTYPE_BRIDGE:
3750 sec_reg = PCIR_SECBUS_1;
3751 sub_reg = PCIR_SUBBUS_1;
3753 case PCIM_HDRTYPE_CARDBUS:
3754 sec_reg = PCIR_SECBUS_2;
3755 sub_reg = PCIR_SUBBUS_2;
3764 if (resource_list_find(rl, PCI_RES_BUS, *rid) == NULL)
3765 resource_list_add(rl, PCI_RES_BUS, *rid, start, end, count);
3766 if (!resource_list_reserved(rl, PCI_RES_BUS, *rid)) {
3767 res = resource_list_reserve(rl, dev, child, PCI_RES_BUS, rid,
3768 start, end, count, flags & ~RF_ACTIVE);
3770 resource_list_delete(rl, PCI_RES_BUS, *rid);
3771 device_printf(child, "allocating %ju bus%s failed\n",
3772 count, count == 1 ? "" : "es");
3776 device_printf(child,
3777 "Lazy allocation of %ju bus%s at %ju\n", count,
3778 count == 1 ? "" : "es", rman_get_start(res));
3779 PCI_WRITE_CONFIG(dev, child, sec_reg, rman_get_start(res), 1);
3780 PCI_WRITE_CONFIG(dev, child, sub_reg, rman_get_end(res), 1);
3782 return (resource_list_alloc(rl, dev, child, PCI_RES_BUS, rid, start,
3783 end, count, flags));
3788 pci_ea_bei_to_rid(device_t dev, int bei)
3791 struct pci_devinfo *dinfo;
3793 struct pcicfg_iov *iov;
3795 dinfo = device_get_ivars(dev);
3796 iov = dinfo->cfg.iov;
3798 iov_pos = iov->iov_pos;
3803 /* Check if matches BAR */
3804 if ((bei >= PCIM_EA_BEI_BAR_0) &&
3805 (bei <= PCIM_EA_BEI_BAR_5))
3806 return (PCIR_BAR(bei));
3809 if (bei == PCIM_EA_BEI_ROM)
3813 /* Check if matches VF_BAR */
3814 if ((iov != NULL) && (bei >= PCIM_EA_BEI_VF_BAR_0) &&
3815 (bei <= PCIM_EA_BEI_VF_BAR_5))
3816 return (PCIR_SRIOV_BAR(bei - PCIM_EA_BEI_VF_BAR_0) +
3824 pci_ea_is_enabled(device_t dev, int rid)
3826 struct pci_ea_entry *ea;
3827 struct pci_devinfo *dinfo;
3829 dinfo = device_get_ivars(dev);
3831 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3832 if (pci_ea_bei_to_rid(dev, ea->eae_bei) == rid)
3833 return ((ea->eae_flags & PCIM_EA_ENABLE) > 0);
3840 pci_add_resources_ea(device_t bus, device_t dev, int alloc_iov)
3842 struct pci_ea_entry *ea;
3843 struct pci_devinfo *dinfo;
3844 pci_addr_t start, end, count;
3845 struct resource_list *rl;
3846 int type, flags, rid;
3847 struct resource *res;
3850 struct pcicfg_iov *iov;
3853 dinfo = device_get_ivars(dev);
3854 rl = &dinfo->resources;
3858 iov = dinfo->cfg.iov;
3861 if (dinfo->cfg.ea.ea_location == 0)
3864 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3867 * TODO: Ignore EA-BAR if is not enabled.
3868 * Currently the EA implementation supports
3869 * only situation, where EA structure contains
3870 * predefined entries. In case they are not enabled
3871 * leave them unallocated and proceed with
3872 * a legacy-BAR mechanism.
3874 if ((ea->eae_flags & PCIM_EA_ENABLE) == 0)
3877 switch ((ea->eae_flags & PCIM_EA_PP) >> PCIM_EA_PP_OFFSET) {
3878 case PCIM_EA_P_MEM_PREFETCH:
3879 case PCIM_EA_P_VF_MEM_PREFETCH:
3880 flags = RF_PREFETCHABLE;
3882 case PCIM_EA_P_VF_MEM:
3884 type = SYS_RES_MEMORY;
3887 type = SYS_RES_IOPORT;
3893 if (alloc_iov != 0) {
3895 /* Allocating IOV, confirm BEI matches */
3896 if ((ea->eae_bei < PCIM_EA_BEI_VF_BAR_0) ||
3897 (ea->eae_bei > PCIM_EA_BEI_VF_BAR_5))
3903 /* Allocating BAR, confirm BEI matches */
3904 if (((ea->eae_bei < PCIM_EA_BEI_BAR_0) ||
3905 (ea->eae_bei > PCIM_EA_BEI_BAR_5)) &&
3906 (ea->eae_bei != PCIM_EA_BEI_ROM))
3910 rid = pci_ea_bei_to_rid(dev, ea->eae_bei);
3914 /* Skip resources already allocated by EA */
3915 if ((resource_list_find(rl, SYS_RES_MEMORY, rid) != NULL) ||
3916 (resource_list_find(rl, SYS_RES_IOPORT, rid) != NULL))
3919 start = ea->eae_base;
3920 count = ea->eae_max_offset + 1;
3923 count = count * iov->iov_num_vfs;
3925 end = start + count - 1;
3929 resource_list_add(rl, type, rid, start, end, count);
3930 res = resource_list_reserve(rl, bus, dev, type, &rid, start, end, count,
3933 resource_list_delete(rl, type, rid);
3936 * Failed to allocate using EA, disable entry.
3937 * Another attempt to allocation will be performed
3938 * further, but this time using legacy BAR registers
3940 tmp = pci_read_config(dev, ea->eae_cfg_offset, 4);
3941 tmp &= ~PCIM_EA_ENABLE;
3942 pci_write_config(dev, ea->eae_cfg_offset, tmp, 4);
3945 * Disabling entry might fail in case it is hardwired.
3946 * Read flags again to match current status.
3948 ea->eae_flags = pci_read_config(dev, ea->eae_cfg_offset, 4);
3953 /* As per specification, fill BAR with zeros */
3954 pci_write_config(dev, rid, 0, 4);
3959 pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask)
3961 struct pci_devinfo *dinfo;
3963 struct resource_list *rl;
3964 const struct pci_quirk *q;
3968 dinfo = device_get_ivars(dev);
3970 rl = &dinfo->resources;
3971 devid = (cfg->device << 16) | cfg->vendor;
3973 /* Allocate resources using Enhanced Allocation */
3974 pci_add_resources_ea(bus, dev, 0);
3976 /* ATA devices needs special map treatment */
3977 if ((pci_get_class(dev) == PCIC_STORAGE) &&
3978 (pci_get_subclass(dev) == PCIS_STORAGE_IDE) &&
3979 ((pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) ||
3980 (!pci_read_config(dev, PCIR_BAR(0), 4) &&
3981 !pci_read_config(dev, PCIR_BAR(2), 4))) )
3982 pci_ata_maps(bus, dev, rl, force, prefetchmask);
3984 for (i = 0; i < cfg->nummaps;) {
3985 /* Skip resources already managed by EA */
3986 if ((resource_list_find(rl, SYS_RES_MEMORY, PCIR_BAR(i)) != NULL) ||
3987 (resource_list_find(rl, SYS_RES_IOPORT, PCIR_BAR(i)) != NULL) ||
3988 pci_ea_is_enabled(dev, PCIR_BAR(i))) {
3994 * Skip quirked resources.
3996 for (q = &pci_quirks[0]; q->devid != 0; q++)
3997 if (q->devid == devid &&
3998 q->type == PCI_QUIRK_UNMAP_REG &&
3999 q->arg1 == PCIR_BAR(i))
4001 if (q->devid != 0) {
4005 i += pci_add_map(bus, dev, PCIR_BAR(i), rl, force,
4006 prefetchmask & (1 << i));
4010 * Add additional, quirked resources.
4012 for (q = &pci_quirks[0]; q->devid != 0; q++)
4013 if (q->devid == devid && q->type == PCI_QUIRK_MAP_REG)
4014 pci_add_map(bus, dev, q->arg1, rl, force, 0);
4016 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) {
4017 #ifdef __PCI_REROUTE_INTERRUPT
4019 * Try to re-route interrupts. Sometimes the BIOS or
4020 * firmware may leave bogus values in these registers.
4021 * If the re-route fails, then just stick with what we
4024 pci_assign_interrupt(bus, dev, 1);
4026 pci_assign_interrupt(bus, dev, 0);
4030 if (pci_usb_takeover && pci_get_class(dev) == PCIC_SERIALBUS &&
4031 pci_get_subclass(dev) == PCIS_SERIALBUS_USB) {
4032 if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_XHCI)
4033 xhci_early_takeover(dev);
4034 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_EHCI)
4035 ehci_early_takeover(dev);
4036 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_OHCI)
4037 ohci_early_takeover(dev);
4038 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI)
4039 uhci_early_takeover(dev);
4042 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
4044 * Reserve resources for secondary bus ranges behind bridge
4047 pci_reserve_secbus(bus, dev, cfg, rl);
4051 static struct pci_devinfo *
4052 pci_identify_function(device_t pcib, device_t dev, int domain, int busno,
4055 struct pci_devinfo *dinfo;
4057 dinfo = pci_read_device(pcib, dev, domain, busno, slot, func);
4059 pci_add_child(dev, dinfo);
4065 pci_add_children(device_t dev, int domain, int busno)
4067 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4068 device_t pcib = device_get_parent(dev);
4069 struct pci_devinfo *dinfo;
4071 int s, f, pcifunchigh;
4076 * Try to detect a device at slot 0, function 0. If it exists, try to
4077 * enable ARI. We must enable ARI before detecting the rest of the
4078 * functions on this bus as ARI changes the set of slots and functions
4079 * that are legal on this bus.
4081 dinfo = pci_identify_function(pcib, dev, domain, busno, 0, 0);
4082 if (dinfo != NULL && pci_enable_ari)
4083 PCIB_TRY_ENABLE_ARI(pcib, dinfo->cfg.dev);
4086 * Start looking for new devices on slot 0 at function 1 because we
4087 * just identified the device at slot 0, function 0.
4091 maxslots = PCIB_MAXSLOTS(pcib);
4092 for (s = 0; s <= maxslots; s++, first_func = 0) {
4096 hdrtype = REG(PCIR_HDRTYPE, 1);
4097 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4099 if (hdrtype & PCIM_MFDEV)
4100 pcifunchigh = PCIB_MAXFUNCS(pcib);
4101 for (f = first_func; f <= pcifunchigh; f++)
4102 pci_identify_function(pcib, dev, domain, busno, s, f);
4108 pci_rescan_method(device_t dev)
4110 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4111 device_t pcib = device_get_parent(dev);
4112 device_t child, *devlist, *unchanged;
4113 int devcount, error, i, j, maxslots, oldcount;
4114 int busno, domain, s, f, pcifunchigh;
4117 /* No need to check for ARI on a rescan. */
4118 error = device_get_children(dev, &devlist, &devcount);
4121 if (devcount != 0) {
4122 unchanged = malloc(devcount * sizeof(device_t), M_TEMP,
4124 if (unchanged == NULL) {
4125 free(devlist, M_TEMP);
4131 domain = pcib_get_domain(dev);
4132 busno = pcib_get_bus(dev);
4133 maxslots = PCIB_MAXSLOTS(pcib);
4134 for (s = 0; s <= maxslots; s++) {
4135 /* If function 0 is not present, skip to the next slot. */
4137 if (REG(PCIR_VENDOR, 2) == 0xffff)
4140 hdrtype = REG(PCIR_HDRTYPE, 1);
4141 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4143 if (hdrtype & PCIM_MFDEV)
4144 pcifunchigh = PCIB_MAXFUNCS(pcib);
4145 for (f = 0; f <= pcifunchigh; f++) {
4146 if (REG(PCIR_VENDOR, 2) == 0xffff)
4150 * Found a valid function. Check if a
4151 * device_t for this device already exists.
4153 for (i = 0; i < devcount; i++) {
4157 if (pci_get_slot(child) == s &&
4158 pci_get_function(child) == f) {
4159 unchanged[i] = child;
4164 pci_identify_function(pcib, dev, domain, busno, s, f);
4169 /* Remove devices that are no longer present. */
4170 for (i = 0; i < devcount; i++) {
4171 if (unchanged[i] != NULL)
4173 device_delete_child(dev, devlist[i]);
4176 free(devlist, M_TEMP);
4177 oldcount = devcount;
4179 /* Try to attach the devices just added. */
4180 error = device_get_children(dev, &devlist, &devcount);
4182 free(unchanged, M_TEMP);
4186 for (i = 0; i < devcount; i++) {
4187 for (j = 0; j < oldcount; j++) {
4188 if (devlist[i] == unchanged[j])
4192 device_probe_and_attach(devlist[i]);
4196 free(unchanged, M_TEMP);
4197 free(devlist, M_TEMP);
4204 pci_add_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
4207 struct pci_devinfo *vf_dinfo;
4209 int busno, slot, func;
4211 pcib = device_get_parent(bus);
4213 PCIB_DECODE_RID(pcib, rid, &busno, &slot, &func);
4215 vf_dinfo = pci_fill_devinfo(pcib, bus, pci_get_domain(pcib), busno,
4216 slot, func, vid, did);
4218 vf_dinfo->cfg.flags |= PCICFG_VF;
4219 pci_add_child(bus, vf_dinfo);
4221 return (vf_dinfo->cfg.dev);
4225 pci_create_iov_child_method(device_t bus, device_t pf, uint16_t rid,
4226 uint16_t vid, uint16_t did)
4229 return (pci_add_iov_child(bus, pf, rid, vid, did));
4234 pci_add_child_clear_aer(device_t dev, struct pci_devinfo *dinfo)
4240 if (dinfo->cfg.pcie.pcie_location != 0 &&
4241 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT) {
4242 r2 = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4244 r2 &= ~(PCIEM_ROOT_CTL_SERR_CORR |
4245 PCIEM_ROOT_CTL_SERR_NONFATAL | PCIEM_ROOT_CTL_SERR_FATAL);
4246 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4247 PCIER_ROOT_CTL, r2, 2);
4249 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
4250 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
4251 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
4252 if (r != 0 && bootverbose) {
4253 pci_printf(&dinfo->cfg,
4254 "clearing AER UC 0x%08x -> 0x%08x\n",
4255 r, pci_read_config(dev, aer + PCIR_AER_UC_STATUS,
4259 r = pci_read_config(dev, aer + PCIR_AER_UC_MASK, 4);
4260 r &= ~(PCIM_AER_UC_TRAINING_ERROR |
4261 PCIM_AER_UC_DL_PROTOCOL_ERROR |
4262 PCIM_AER_UC_SURPRISE_LINK_DOWN |
4263 PCIM_AER_UC_POISONED_TLP |
4264 PCIM_AER_UC_FC_PROTOCOL_ERROR |
4265 PCIM_AER_UC_COMPLETION_TIMEOUT |
4266 PCIM_AER_UC_COMPLETER_ABORT |
4267 PCIM_AER_UC_UNEXPECTED_COMPLETION |
4268 PCIM_AER_UC_RECEIVER_OVERFLOW |
4269 PCIM_AER_UC_MALFORMED_TLP |
4270 PCIM_AER_UC_ECRC_ERROR |
4271 PCIM_AER_UC_UNSUPPORTED_REQUEST |
4272 PCIM_AER_UC_ACS_VIOLATION |
4273 PCIM_AER_UC_INTERNAL_ERROR |
4274 PCIM_AER_UC_MC_BLOCKED_TLP |
4275 PCIM_AER_UC_ATOMIC_EGRESS_BLK |
4276 PCIM_AER_UC_TLP_PREFIX_BLOCKED);
4277 pci_write_config(dev, aer + PCIR_AER_UC_MASK, r, 4);
4279 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
4280 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
4281 if (r != 0 && bootverbose) {
4282 pci_printf(&dinfo->cfg,
4283 "clearing AER COR 0x%08x -> 0x%08x\n",
4284 r, pci_read_config(dev, aer + PCIR_AER_COR_STATUS,
4288 r = pci_read_config(dev, aer + PCIR_AER_COR_MASK, 4);
4289 r &= ~(PCIM_AER_COR_RECEIVER_ERROR |
4290 PCIM_AER_COR_BAD_TLP |
4291 PCIM_AER_COR_BAD_DLLP |
4292 PCIM_AER_COR_REPLAY_ROLLOVER |
4293 PCIM_AER_COR_REPLAY_TIMEOUT |
4294 PCIM_AER_COR_ADVISORY_NF_ERROR |
4295 PCIM_AER_COR_INTERNAL_ERROR |
4296 PCIM_AER_COR_HEADER_LOG_OVFLOW);
4297 pci_write_config(dev, aer + PCIR_AER_COR_MASK, r, 4);
4299 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4300 PCIER_DEVICE_CTL, 2);
4301 r |= PCIEM_CTL_COR_ENABLE | PCIEM_CTL_NFER_ENABLE |
4302 PCIEM_CTL_FER_ENABLE | PCIEM_CTL_URR_ENABLE;
4303 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4304 PCIER_DEVICE_CTL, r, 2);
4309 pci_add_child(device_t bus, struct pci_devinfo *dinfo)
4313 dinfo->cfg.dev = dev = device_add_child(bus, NULL, -1);
4314 device_set_ivars(dev, dinfo);
4315 resource_list_init(&dinfo->resources);
4316 pci_cfg_save(dev, dinfo, 0);
4317 pci_cfg_restore(dev, dinfo);
4318 pci_print_verbose(dinfo);
4319 pci_add_resources(bus, dev, 0, 0);
4320 pci_child_added(dinfo->cfg.dev);
4322 if (pci_clear_aer_on_attach)
4323 pci_add_child_clear_aer(dev, dinfo);
4325 EVENTHANDLER_INVOKE(pci_add_device, dinfo->cfg.dev);
4329 pci_child_added_method(device_t dev, device_t child)
4335 pci_probe(device_t dev)
4338 device_set_desc(dev, "PCI bus");
4340 /* Allow other subclasses to override this driver. */
4341 return (BUS_PROBE_GENERIC);
4345 pci_attach_common(device_t dev)
4347 struct pci_softc *sc;
4353 sc = device_get_softc(dev);
4354 domain = pcib_get_domain(dev);
4355 busno = pcib_get_bus(dev);
4358 sc->sc_bus = bus_alloc_resource(dev, PCI_RES_BUS, &rid, busno, busno,
4360 if (sc->sc_bus == NULL) {
4361 device_printf(dev, "failed to allocate bus number\n");
4366 device_printf(dev, "domain=%d, physical bus=%d\n",
4368 sc->sc_dma_tag = bus_get_dma_tag(dev);
4373 pci_attach(device_t dev)
4375 int busno, domain, error;
4377 error = pci_attach_common(dev);
4382 * Since there can be multiple independently numbered PCI
4383 * buses on systems with multiple PCI domains, we can't use
4384 * the unit number to decide which bus we are probing. We ask
4385 * the parent pcib what our domain and bus numbers are.
4387 domain = pcib_get_domain(dev);
4388 busno = pcib_get_bus(dev);
4389 pci_add_children(dev, domain, busno);
4390 return (bus_generic_attach(dev));
4394 pci_detach(device_t dev)
4397 struct pci_softc *sc;
4401 error = bus_generic_detach(dev);
4405 sc = device_get_softc(dev);
4406 error = bus_release_resource(dev, PCI_RES_BUS, 0, sc->sc_bus);
4410 return (device_delete_children(dev));
4414 pci_hint_device_unit(device_t dev, device_t child, const char *name, int *unitp)
4418 char me1[24], me2[32];
4422 d = pci_get_domain(child);
4423 b = pci_get_bus(child);
4424 s = pci_get_slot(child);
4425 f = pci_get_function(child);
4426 snprintf(me1, sizeof(me1), "pci%u:%u:%u", b, s, f);
4427 snprintf(me2, sizeof(me2), "pci%u:%u:%u:%u", d, b, s, f);
4429 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) {
4430 resource_string_value(name, unit, "at", &at);
4431 if (strcmp(at, me1) != 0 && strcmp(at, me2) != 0)
4432 continue; /* No match, try next candidate */
4439 pci_set_power_child(device_t dev, device_t child, int state)
4445 * Set the device to the given state. If the firmware suggests
4446 * a different power state, use it instead. If power management
4447 * is not present, the firmware is responsible for managing
4448 * device power. Skip children who aren't attached since they
4449 * are handled separately.
4451 pcib = device_get_parent(dev);
4453 if (device_is_attached(child) &&
4454 PCIB_POWER_FOR_SLEEP(pcib, child, &dstate) == 0)
4455 pci_set_powerstate(child, dstate);
4459 pci_suspend_child(device_t dev, device_t child)
4461 struct pci_devinfo *dinfo;
4462 struct resource_list_entry *rle;
4465 dinfo = device_get_ivars(child);
4468 * Save the PCI configuration space for the child and set the
4469 * device in the appropriate power state for this sleep state.
4471 pci_cfg_save(child, dinfo, 0);
4473 /* Suspend devices before potentially powering them down. */
4474 error = bus_generic_suspend_child(dev, child);
4479 if (pci_do_power_suspend) {
4481 * Make sure this device's interrupt handler is not invoked
4482 * in the case the device uses a shared interrupt that can
4483 * be raised by some other device.
4484 * This is applicable only to regular (legacy) PCI interrupts
4485 * as MSI/MSI-X interrupts are never shared.
4487 rle = resource_list_find(&dinfo->resources,
4489 if (rle != NULL && rle->res != NULL)
4490 (void)bus_suspend_intr(child, rle->res);
4491 pci_set_power_child(dev, child, PCI_POWERSTATE_D3);
4498 pci_resume_child(device_t dev, device_t child)
4500 struct pci_devinfo *dinfo;
4501 struct resource_list_entry *rle;
4503 if (pci_do_power_resume)
4504 pci_set_power_child(dev, child, PCI_POWERSTATE_D0);
4506 dinfo = device_get_ivars(child);
4507 pci_cfg_restore(child, dinfo);
4508 if (!device_is_attached(child))
4509 pci_cfg_save(child, dinfo, 1);
4511 bus_generic_resume_child(dev, child);
4514 * Allow interrupts only after fully resuming the driver and hardware.
4516 if (pci_do_power_suspend) {
4517 /* See pci_suspend_child for details. */
4518 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
4519 if (rle != NULL && rle->res != NULL)
4520 (void)bus_resume_intr(child, rle->res);
4527 pci_resume(device_t dev)
4529 device_t child, *devlist;
4530 int error, i, numdevs;
4532 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0)
4536 * Resume critical devices first, then everything else later.
4538 for (i = 0; i < numdevs; i++) {
4540 switch (pci_get_class(child)) {
4544 case PCIC_BASEPERIPH:
4545 BUS_RESUME_CHILD(dev, child);
4549 for (i = 0; i < numdevs; i++) {
4551 switch (pci_get_class(child)) {
4555 case PCIC_BASEPERIPH:
4558 BUS_RESUME_CHILD(dev, child);
4561 free(devlist, M_TEMP);
4566 pci_load_vendor_data(void)
4572 data = preload_search_by_type("pci_vendor_data");
4574 ptr = preload_fetch_addr(data);
4575 sz = preload_fetch_size(data);
4576 if (ptr != NULL && sz != 0) {
4577 pci_vendordata = ptr;
4578 pci_vendordata_size = sz;
4579 /* terminate the database */
4580 pci_vendordata[pci_vendordata_size] = '\n';
4586 pci_driver_added(device_t dev, driver_t *driver)
4591 struct pci_devinfo *dinfo;
4595 device_printf(dev, "driver added\n");
4596 DEVICE_IDENTIFY(driver, dev);
4597 if (device_get_children(dev, &devlist, &numdevs) != 0)
4599 for (i = 0; i < numdevs; i++) {
4601 if (device_get_state(child) != DS_NOTPRESENT)
4603 dinfo = device_get_ivars(child);
4604 pci_print_verbose(dinfo);
4606 pci_printf(&dinfo->cfg, "reprobing on driver added\n");
4607 pci_cfg_restore(child, dinfo);
4608 if (device_probe_and_attach(child) != 0)
4609 pci_child_detached(dev, child);
4611 free(devlist, M_TEMP);
4615 pci_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
4616 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep)
4618 struct pci_devinfo *dinfo;
4619 struct msix_table_entry *mte;
4620 struct msix_vector *mv;
4626 error = bus_generic_setup_intr(dev, child, irq, flags, filter, intr,
4631 /* If this is not a direct child, just bail out. */
4632 if (device_get_parent(child) != dev) {
4637 rid = rman_get_rid(irq);
4639 /* Make sure that INTx is enabled */
4640 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4643 * Check to see if the interrupt is MSI or MSI-X.
4644 * Ask our parent to map the MSI and give
4645 * us the address and data register values.
4646 * If we fail for some reason, teardown the
4647 * interrupt handler.
4649 dinfo = device_get_ivars(child);
4650 if (dinfo->cfg.msi.msi_alloc > 0) {
4651 if (dinfo->cfg.msi.msi_addr == 0) {
4652 KASSERT(dinfo->cfg.msi.msi_handlers == 0,
4653 ("MSI has handlers, but vectors not mapped"));
4654 error = PCIB_MAP_MSI(device_get_parent(dev),
4655 child, rman_get_start(irq), &addr, &data);
4658 dinfo->cfg.msi.msi_addr = addr;
4659 dinfo->cfg.msi.msi_data = data;
4661 if (dinfo->cfg.msi.msi_handlers == 0)
4662 pci_enable_msi(child, dinfo->cfg.msi.msi_addr,
4663 dinfo->cfg.msi.msi_data);
4664 dinfo->cfg.msi.msi_handlers++;
4666 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4667 ("No MSI or MSI-X interrupts allocated"));
4668 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4669 ("MSI-X index too high"));
4670 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4671 KASSERT(mte->mte_vector != 0, ("no message vector"));
4672 mv = &dinfo->cfg.msix.msix_vectors[mte->mte_vector - 1];
4673 KASSERT(mv->mv_irq == rman_get_start(irq),
4675 if (mv->mv_address == 0) {
4676 KASSERT(mte->mte_handlers == 0,
4677 ("MSI-X table entry has handlers, but vector not mapped"));
4678 error = PCIB_MAP_MSI(device_get_parent(dev),
4679 child, rman_get_start(irq), &addr, &data);
4682 mv->mv_address = addr;
4687 * The MSIX table entry must be made valid by
4688 * incrementing the mte_handlers before
4689 * calling pci_enable_msix() and
4690 * pci_resume_msix(). Else the MSIX rewrite
4691 * table quirk will not work as expected.
4693 mte->mte_handlers++;
4694 if (mte->mte_handlers == 1) {
4695 pci_enable_msix(child, rid - 1, mv->mv_address,
4697 pci_unmask_msix(child, rid - 1);
4702 * Make sure that INTx is disabled if we are using MSI/MSI-X,
4703 * unless the device is affected by PCI_QUIRK_MSI_INTX_BUG,
4704 * in which case we "enable" INTx so MSI/MSI-X actually works.
4706 if (!pci_has_quirk(pci_get_devid(child),
4707 PCI_QUIRK_MSI_INTX_BUG))
4708 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4710 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4713 (void)bus_generic_teardown_intr(dev, child, irq,
4723 pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
4726 struct msix_table_entry *mte;
4727 struct resource_list_entry *rle;
4728 struct pci_devinfo *dinfo;
4731 if (irq == NULL || !(rman_get_flags(irq) & RF_ACTIVE))
4734 /* If this isn't a direct child, just bail out */
4735 if (device_get_parent(child) != dev)
4736 return(bus_generic_teardown_intr(dev, child, irq, cookie));
4738 rid = rman_get_rid(irq);
4741 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4744 * Check to see if the interrupt is MSI or MSI-X. If so,
4745 * decrement the appropriate handlers count and mask the
4746 * MSI-X message, or disable MSI messages if the count
4749 dinfo = device_get_ivars(child);
4750 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, rid);
4751 if (rle->res != irq)
4753 if (dinfo->cfg.msi.msi_alloc > 0) {
4754 KASSERT(rid <= dinfo->cfg.msi.msi_alloc,
4755 ("MSI-X index too high"));
4756 if (dinfo->cfg.msi.msi_handlers == 0)
4758 dinfo->cfg.msi.msi_handlers--;
4759 if (dinfo->cfg.msi.msi_handlers == 0)
4760 pci_disable_msi(child);
4762 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4763 ("No MSI or MSI-X interrupts allocated"));
4764 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4765 ("MSI-X index too high"));
4766 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4767 if (mte->mte_handlers == 0)
4769 mte->mte_handlers--;
4770 if (mte->mte_handlers == 0)
4771 pci_mask_msix(child, rid - 1);
4774 error = bus_generic_teardown_intr(dev, child, irq, cookie);
4777 ("%s: generic teardown failed for MSI/MSI-X", __func__));
4782 pci_print_child(device_t dev, device_t child)
4784 struct pci_devinfo *dinfo;
4785 struct resource_list *rl;
4788 dinfo = device_get_ivars(child);
4789 rl = &dinfo->resources;
4791 retval += bus_print_child_header(dev, child);
4793 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
4794 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
4795 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
4796 if (device_get_flags(dev))
4797 retval += printf(" flags %#x", device_get_flags(dev));
4799 retval += printf(" at device %d.%d", pci_get_slot(child),
4800 pci_get_function(child));
4802 retval += bus_print_child_domain(dev, child);
4803 retval += bus_print_child_footer(dev, child);
4812 int report; /* 0 = bootverbose, 1 = always */
4814 } pci_nomatch_tab[] = {
4815 {PCIC_OLD, -1, 1, "old"},
4816 {PCIC_OLD, PCIS_OLD_NONVGA, 1, "non-VGA display device"},
4817 {PCIC_OLD, PCIS_OLD_VGA, 1, "VGA-compatible display device"},
4818 {PCIC_STORAGE, -1, 1, "mass storage"},
4819 {PCIC_STORAGE, PCIS_STORAGE_SCSI, 1, "SCSI"},
4820 {PCIC_STORAGE, PCIS_STORAGE_IDE, 1, "ATA"},
4821 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, 1, "floppy disk"},
4822 {PCIC_STORAGE, PCIS_STORAGE_IPI, 1, "IPI"},
4823 {PCIC_STORAGE, PCIS_STORAGE_RAID, 1, "RAID"},
4824 {PCIC_STORAGE, PCIS_STORAGE_ATA_ADMA, 1, "ATA (ADMA)"},
4825 {PCIC_STORAGE, PCIS_STORAGE_SATA, 1, "SATA"},
4826 {PCIC_STORAGE, PCIS_STORAGE_SAS, 1, "SAS"},
4827 {PCIC_STORAGE, PCIS_STORAGE_NVM, 1, "NVM"},
4828 {PCIC_NETWORK, -1, 1, "network"},
4829 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, 1, "ethernet"},
4830 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, 1, "token ring"},
4831 {PCIC_NETWORK, PCIS_NETWORK_FDDI, 1, "fddi"},
4832 {PCIC_NETWORK, PCIS_NETWORK_ATM, 1, "ATM"},
4833 {PCIC_NETWORK, PCIS_NETWORK_ISDN, 1, "ISDN"},
4834 {PCIC_DISPLAY, -1, 1, "display"},
4835 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, 1, "VGA"},
4836 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, 1, "XGA"},
4837 {PCIC_DISPLAY, PCIS_DISPLAY_3D, 1, "3D"},
4838 {PCIC_MULTIMEDIA, -1, 1, "multimedia"},
4839 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, 1, "video"},
4840 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, 1, "audio"},
4841 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_TELE, 1, "telephony"},
4842 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_HDA, 1, "HDA"},
4843 {PCIC_MEMORY, -1, 1, "memory"},
4844 {PCIC_MEMORY, PCIS_MEMORY_RAM, 1, "RAM"},
4845 {PCIC_MEMORY, PCIS_MEMORY_FLASH, 1, "flash"},
4846 {PCIC_BRIDGE, -1, 1, "bridge"},
4847 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, 1, "HOST-PCI"},
4848 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, 1, "PCI-ISA"},
4849 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, 1, "PCI-EISA"},
4850 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, 1, "PCI-MCA"},
4851 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, 1, "PCI-PCI"},
4852 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, 1, "PCI-PCMCIA"},
4853 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, 1, "PCI-NuBus"},
4854 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, 1, "PCI-CardBus"},
4855 {PCIC_BRIDGE, PCIS_BRIDGE_RACEWAY, 1, "PCI-RACEway"},
4856 {PCIC_SIMPLECOMM, -1, 1, "simple comms"},
4857 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, 1, "UART"}, /* could detect 16550 */
4858 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, 1, "parallel port"},
4859 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MULSER, 1, "multiport serial"},
4860 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MODEM, 1, "generic modem"},
4861 {PCIC_BASEPERIPH, -1, 0, "base peripheral"},
4862 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, 1, "interrupt controller"},
4863 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, 1, "DMA controller"},
4864 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, 1, "timer"},
4865 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, 1, "realtime clock"},
4866 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PCIHOT, 1, "PCI hot-plug controller"},
4867 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_SDHC, 1, "SD host controller"},
4868 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_IOMMU, 1, "IOMMU"},
4869 {PCIC_INPUTDEV, -1, 1, "input device"},
4870 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, 1, "keyboard"},
4871 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,1, "digitizer"},
4872 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, 1, "mouse"},
4873 {PCIC_INPUTDEV, PCIS_INPUTDEV_SCANNER, 1, "scanner"},
4874 {PCIC_INPUTDEV, PCIS_INPUTDEV_GAMEPORT, 1, "gameport"},
4875 {PCIC_DOCKING, -1, 1, "docking station"},
4876 {PCIC_PROCESSOR, -1, 1, "processor"},
4877 {PCIC_SERIALBUS, -1, 1, "serial bus"},
4878 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, 1, "FireWire"},
4879 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, 1, "AccessBus"},
4880 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, 1, "SSA"},
4881 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, 1, "USB"},
4882 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, 1, "Fibre Channel"},
4883 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, 0, "SMBus"},
4884 {PCIC_WIRELESS, -1, 1, "wireless controller"},
4885 {PCIC_WIRELESS, PCIS_WIRELESS_IRDA, 1, "iRDA"},
4886 {PCIC_WIRELESS, PCIS_WIRELESS_IR, 1, "IR"},
4887 {PCIC_WIRELESS, PCIS_WIRELESS_RF, 1, "RF"},
4888 {PCIC_INTELLIIO, -1, 1, "intelligent I/O controller"},
4889 {PCIC_INTELLIIO, PCIS_INTELLIIO_I2O, 1, "I2O"},
4890 {PCIC_SATCOM, -1, 1, "satellite communication"},
4891 {PCIC_SATCOM, PCIS_SATCOM_TV, 1, "sat TV"},
4892 {PCIC_SATCOM, PCIS_SATCOM_AUDIO, 1, "sat audio"},
4893 {PCIC_SATCOM, PCIS_SATCOM_VOICE, 1, "sat voice"},
4894 {PCIC_SATCOM, PCIS_SATCOM_DATA, 1, "sat data"},
4895 {PCIC_CRYPTO, -1, 1, "encrypt/decrypt"},
4896 {PCIC_CRYPTO, PCIS_CRYPTO_NETCOMP, 1, "network/computer crypto"},
4897 {PCIC_CRYPTO, PCIS_CRYPTO_ENTERTAIN, 1, "entertainment crypto"},
4898 {PCIC_DASP, -1, 0, "dasp"},
4899 {PCIC_DASP, PCIS_DASP_DPIO, 1, "DPIO module"},
4900 {PCIC_DASP, PCIS_DASP_PERFCNTRS, 1, "performance counters"},
4901 {PCIC_DASP, PCIS_DASP_COMM_SYNC, 1, "communication synchronizer"},
4902 {PCIC_DASP, PCIS_DASP_MGMT_CARD, 1, "signal processing management"},
4907 pci_probe_nomatch(device_t dev, device_t child)
4910 const char *cp, *scp;
4914 * Look for a listing for this device in a loaded device database.
4917 if ((device = pci_describe_device(child)) != NULL) {
4918 device_printf(dev, "<%s>", device);
4919 free(device, M_DEVBUF);
4922 * Scan the class/subclass descriptions for a general
4927 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
4928 if (pci_nomatch_tab[i].class == pci_get_class(child)) {
4929 if (pci_nomatch_tab[i].subclass == -1) {
4930 cp = pci_nomatch_tab[i].desc;
4931 report = pci_nomatch_tab[i].report;
4932 } else if (pci_nomatch_tab[i].subclass ==
4933 pci_get_subclass(child)) {
4934 scp = pci_nomatch_tab[i].desc;
4935 report = pci_nomatch_tab[i].report;
4939 if (report || bootverbose) {
4940 device_printf(dev, "<%s%s%s>",
4942 ((cp != NULL) && (scp != NULL)) ? ", " : "",
4946 if (report || bootverbose) {
4947 printf(" at device %d.%d (no driver attached)\n",
4948 pci_get_slot(child), pci_get_function(child));
4950 pci_cfg_save(child, device_get_ivars(child), 1);
4954 pci_child_detached(device_t dev, device_t child)
4956 struct pci_devinfo *dinfo;
4957 struct resource_list *rl;
4959 dinfo = device_get_ivars(child);
4960 rl = &dinfo->resources;
4963 * Have to deallocate IRQs before releasing any MSI messages and
4964 * have to release MSI messages before deallocating any memory
4967 if (resource_list_release_active(rl, dev, child, SYS_RES_IRQ) != 0)
4968 pci_printf(&dinfo->cfg, "Device leaked IRQ resources\n");
4969 if (dinfo->cfg.msi.msi_alloc != 0 || dinfo->cfg.msix.msix_alloc != 0) {
4970 pci_printf(&dinfo->cfg, "Device leaked MSI vectors\n");
4971 (void)pci_release_msi(child);
4973 if (resource_list_release_active(rl, dev, child, SYS_RES_MEMORY) != 0)
4974 pci_printf(&dinfo->cfg, "Device leaked memory resources\n");
4975 if (resource_list_release_active(rl, dev, child, SYS_RES_IOPORT) != 0)
4976 pci_printf(&dinfo->cfg, "Device leaked I/O resources\n");
4978 if (resource_list_release_active(rl, dev, child, PCI_RES_BUS) != 0)
4979 pci_printf(&dinfo->cfg, "Device leaked PCI bus numbers\n");
4982 pci_cfg_save(child, dinfo, 1);
4986 * Parse the PCI device database, if loaded, and return a pointer to a
4987 * description of the device.
4989 * The database is flat text formatted as follows:
4991 * Any line not in a valid format is ignored.
4992 * Lines are terminated with newline '\n' characters.
4994 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then
4997 * A DEVICE line is entered immediately below the corresponding VENDOR ID.
4998 * - devices cannot be listed without a corresponding VENDOR line.
4999 * A DEVICE line consists of a TAB, the 4 digit (hex) device code,
5000 * another TAB, then the device name.
5004 * Assuming (ptr) points to the beginning of a line in the database,
5005 * return the vendor or device and description of the next entry.
5006 * The value of (vendor) or (device) inappropriate for the entry type
5007 * is set to -1. Returns nonzero at the end of the database.
5009 * Note that this is slightly unrobust in the face of corrupt data;
5010 * we attempt to safeguard against this by spamming the end of the
5011 * database with a newline when we initialise.
5014 pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc)
5023 left = pci_vendordata_size - (cp - pci_vendordata);
5031 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2)
5035 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2)
5038 /* skip to next line */
5039 while (*cp != '\n' && left > 0) {
5048 /* skip to next line */
5049 while (*cp != '\n' && left > 0) {
5053 if (*cp == '\n' && left > 0)
5060 pci_describe_device(device_t dev)
5063 char *desc, *vp, *dp, *line;
5065 desc = vp = dp = NULL;
5068 * If we have no vendor data, we can't do anything.
5070 if (pci_vendordata == NULL)
5074 * Scan the vendor data looking for this device
5076 line = pci_vendordata;
5077 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5080 if (pci_describe_parse_line(&line, &vendor, &device, &vp))
5082 if (vendor == pci_get_vendor(dev))
5085 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5088 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) {
5096 if (device == pci_get_device(dev))
5100 snprintf(dp, 80, "0x%x", pci_get_device(dev));
5101 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) !=
5103 sprintf(desc, "%s, %s", vp, dp);
5113 pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
5115 struct pci_devinfo *dinfo;
5118 dinfo = device_get_ivars(child);
5122 case PCI_IVAR_ETHADDR:
5124 * The generic accessor doesn't deal with failure, so
5125 * we set the return value, then return an error.
5127 *((uint8_t **) result) = NULL;
5129 case PCI_IVAR_SUBVENDOR:
5130 *result = cfg->subvendor;
5132 case PCI_IVAR_SUBDEVICE:
5133 *result = cfg->subdevice;
5135 case PCI_IVAR_VENDOR:
5136 *result = cfg->vendor;
5138 case PCI_IVAR_DEVICE:
5139 *result = cfg->device;
5141 case PCI_IVAR_DEVID:
5142 *result = (cfg->device << 16) | cfg->vendor;
5144 case PCI_IVAR_CLASS:
5145 *result = cfg->baseclass;
5147 case PCI_IVAR_SUBCLASS:
5148 *result = cfg->subclass;
5150 case PCI_IVAR_PROGIF:
5151 *result = cfg->progif;
5153 case PCI_IVAR_REVID:
5154 *result = cfg->revid;
5156 case PCI_IVAR_INTPIN:
5157 *result = cfg->intpin;
5160 *result = cfg->intline;
5162 case PCI_IVAR_DOMAIN:
5163 *result = cfg->domain;
5169 *result = cfg->slot;
5171 case PCI_IVAR_FUNCTION:
5172 *result = cfg->func;
5174 case PCI_IVAR_CMDREG:
5175 *result = cfg->cmdreg;
5177 case PCI_IVAR_CACHELNSZ:
5178 *result = cfg->cachelnsz;
5180 case PCI_IVAR_MINGNT:
5181 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5185 *result = cfg->mingnt;
5187 case PCI_IVAR_MAXLAT:
5188 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5192 *result = cfg->maxlat;
5194 case PCI_IVAR_LATTIMER:
5195 *result = cfg->lattimer;
5204 pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
5206 struct pci_devinfo *dinfo;
5208 dinfo = device_get_ivars(child);
5211 case PCI_IVAR_INTPIN:
5212 dinfo->cfg.intpin = value;
5214 case PCI_IVAR_ETHADDR:
5215 case PCI_IVAR_SUBVENDOR:
5216 case PCI_IVAR_SUBDEVICE:
5217 case PCI_IVAR_VENDOR:
5218 case PCI_IVAR_DEVICE:
5219 case PCI_IVAR_DEVID:
5220 case PCI_IVAR_CLASS:
5221 case PCI_IVAR_SUBCLASS:
5222 case PCI_IVAR_PROGIF:
5223 case PCI_IVAR_REVID:
5225 case PCI_IVAR_DOMAIN:
5228 case PCI_IVAR_FUNCTION:
5229 return (EINVAL); /* disallow for now */
5236 #include "opt_ddb.h"
5238 #include <ddb/ddb.h>
5239 #include <sys/cons.h>
5242 * List resources based on pci map registers, used for within ddb
5245 DB_SHOW_COMMAND(pciregs, db_pci_dump)
5247 struct pci_devinfo *dinfo;
5248 struct devlist *devlist_head;
5251 int i, error, none_count;
5254 /* get the head of the device queue */
5255 devlist_head = &pci_devq;
5258 * Go through the list of devices and print out devices
5260 for (error = 0, i = 0,
5261 dinfo = STAILQ_FIRST(devlist_head);
5262 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !db_pager_quit;
5263 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
5265 /* Populate pd_name and pd_unit */
5268 name = device_get_name(dinfo->cfg.dev);
5271 db_printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x "
5272 "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
5273 (name && *name) ? name : "none",
5274 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) :
5276 p->pc_sel.pc_domain, p->pc_sel.pc_bus, p->pc_sel.pc_dev,
5277 p->pc_sel.pc_func, (p->pc_class << 16) |
5278 (p->pc_subclass << 8) | p->pc_progif,
5279 (p->pc_subdevice << 16) | p->pc_subvendor,
5280 (p->pc_device << 16) | p->pc_vendor,
5281 p->pc_revid, p->pc_hdr);
5286 static struct resource *
5287 pci_reserve_map(device_t dev, device_t child, int type, int *rid,
5288 rman_res_t start, rman_res_t end, rman_res_t count, u_int num,
5291 struct pci_devinfo *dinfo = device_get_ivars(child);
5292 struct resource_list *rl = &dinfo->resources;
5293 struct resource *res;
5296 pci_addr_t map, testval;
5301 /* If rid is managed by EA, ignore it */
5302 if (pci_ea_is_enabled(child, *rid))
5305 pm = pci_find_bar(child, *rid);
5307 /* This is a BAR that we failed to allocate earlier. */
5308 mapsize = pm->pm_size;
5312 * Weed out the bogons, and figure out how large the
5313 * BAR/map is. BARs that read back 0 here are bogus
5314 * and unimplemented. Note: atapci in legacy mode are
5315 * special and handled elsewhere in the code. If you
5316 * have a atapci device in legacy mode and it fails
5317 * here, that other code is broken.
5319 pci_read_bar(child, *rid, &map, &testval, NULL);
5322 * Determine the size of the BAR and ignore BARs with a size
5323 * of 0. Device ROM BARs use a different mask value.
5325 if (PCIR_IS_BIOS(&dinfo->cfg, *rid))
5326 mapsize = pci_romsize(testval);
5328 mapsize = pci_mapsize(testval);
5331 pm = pci_add_bar(child, *rid, map, mapsize);
5334 if (PCI_BAR_MEM(map) || PCIR_IS_BIOS(&dinfo->cfg, *rid)) {
5335 if (type != SYS_RES_MEMORY) {
5338 "child %s requested type %d for rid %#x,"
5339 " but the BAR says it is an memio\n",
5340 device_get_nameunit(child), type, *rid);
5344 if (type != SYS_RES_IOPORT) {
5347 "child %s requested type %d for rid %#x,"
5348 " but the BAR says it is an ioport\n",
5349 device_get_nameunit(child), type, *rid);
5355 * For real BARs, we need to override the size that
5356 * the driver requests, because that's what the BAR
5357 * actually uses and we would otherwise have a
5358 * situation where we might allocate the excess to
5359 * another driver, which won't work.
5361 count = ((pci_addr_t)1 << mapsize) * num;
5362 if (RF_ALIGNMENT(flags) < mapsize)
5363 flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize);
5364 if (PCI_BAR_MEM(map) && (map & PCIM_BAR_MEM_PREFETCH))
5365 flags |= RF_PREFETCHABLE;
5368 * Allocate enough resource, and then write back the
5369 * appropriate BAR for that resource.
5371 resource_list_add(rl, type, *rid, start, end, count);
5372 res = resource_list_reserve(rl, dev, child, type, rid, start, end,
5373 count, flags & ~RF_ACTIVE);
5375 resource_list_delete(rl, type, *rid);
5376 device_printf(child,
5377 "%#jx bytes of rid %#x res %d failed (%#jx, %#jx).\n",
5378 count, *rid, type, start, end);
5382 device_printf(child,
5383 "Lazy allocation of %#jx bytes rid %#x type %d at %#jx\n",
5384 count, *rid, type, rman_get_start(res));
5386 /* Disable decoding via the CMD register before updating the BAR */
5387 cmd = pci_read_config(child, PCIR_COMMAND, 2);
5388 pci_write_config(child, PCIR_COMMAND,
5389 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
5391 map = rman_get_start(res);
5392 pci_write_bar(child, pm, map);
5394 /* Restore the original value of the CMD register */
5395 pci_write_config(child, PCIR_COMMAND, cmd, 2);
5401 pci_alloc_multi_resource(device_t dev, device_t child, int type, int *rid,
5402 rman_res_t start, rman_res_t end, rman_res_t count, u_long num,
5405 struct pci_devinfo *dinfo;
5406 struct resource_list *rl;
5407 struct resource_list_entry *rle;
5408 struct resource *res;
5412 * Perform lazy resource allocation
5414 dinfo = device_get_ivars(child);
5415 rl = &dinfo->resources;
5418 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
5420 return (pci_alloc_secbus(dev, child, rid, start, end, count,
5425 * Can't alloc legacy interrupt once MSI messages have
5428 if (*rid == 0 && (cfg->msi.msi_alloc > 0 ||
5429 cfg->msix.msix_alloc > 0))
5433 * If the child device doesn't have an interrupt
5434 * routed and is deserving of an interrupt, try to
5437 if (*rid == 0 && !PCI_INTERRUPT_VALID(cfg->intline) &&
5439 pci_assign_interrupt(dev, child, 0);
5441 case SYS_RES_IOPORT:
5442 case SYS_RES_MEMORY:
5445 * PCI-PCI bridge I/O window resources are not BARs.
5446 * For those allocations just pass the request up the
5449 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE) {
5451 case PCIR_IOBASEL_1:
5452 case PCIR_MEMBASE_1:
5453 case PCIR_PMBASEL_1:
5455 * XXX: Should we bother creating a resource
5458 return (bus_generic_alloc_resource(dev, child,
5459 type, rid, start, end, count, flags));
5463 /* Reserve resources for this BAR if needed. */
5464 rle = resource_list_find(rl, type, *rid);
5466 res = pci_reserve_map(dev, child, type, rid, start, end,
5472 return (resource_list_alloc(rl, dev, child, type, rid,
5473 start, end, count, flags));
5477 pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
5478 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
5481 struct pci_devinfo *dinfo;
5484 if (device_get_parent(child) != dev)
5485 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
5486 type, rid, start, end, count, flags));
5489 dinfo = device_get_ivars(child);
5490 if (dinfo->cfg.flags & PCICFG_VF) {
5492 /* VFs can't have I/O BARs. */
5493 case SYS_RES_IOPORT:
5495 case SYS_RES_MEMORY:
5496 return (pci_vf_alloc_mem_resource(dev, child, rid,
5497 start, end, count, flags));
5500 /* Fall through for other types of resource allocations. */
5504 return (pci_alloc_multi_resource(dev, child, type, rid, start, end,
5509 pci_release_resource(device_t dev, device_t child, int type, int rid,
5512 struct pci_devinfo *dinfo;
5513 struct resource_list *rl;
5516 if (device_get_parent(child) != dev)
5517 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
5520 dinfo = device_get_ivars(child);
5524 if (dinfo->cfg.flags & PCICFG_VF) {
5526 /* VFs can't have I/O BARs. */
5527 case SYS_RES_IOPORT:
5529 case SYS_RES_MEMORY:
5530 return (pci_vf_release_mem_resource(dev, child, rid,
5534 /* Fall through for other types of resource allocations. */
5540 * PCI-PCI bridge I/O window resources are not BARs. For
5541 * those allocations just pass the request up the tree.
5543 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE &&
5544 (type == SYS_RES_IOPORT || type == SYS_RES_MEMORY)) {
5546 case PCIR_IOBASEL_1:
5547 case PCIR_MEMBASE_1:
5548 case PCIR_PMBASEL_1:
5549 return (bus_generic_release_resource(dev, child, type,
5555 rl = &dinfo->resources;
5556 return (resource_list_release(rl, dev, child, type, rid, r));
5560 pci_activate_resource(device_t dev, device_t child, int type, int rid,
5563 struct pci_devinfo *dinfo;
5566 error = bus_generic_activate_resource(dev, child, type, rid, r);
5570 /* Enable decoding in the command register when activating BARs. */
5571 if (device_get_parent(child) == dev) {
5572 /* Device ROMs need their decoding explicitly enabled. */
5573 dinfo = device_get_ivars(child);
5574 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5575 pci_write_bar(child, pci_find_bar(child, rid),
5576 rman_get_start(r) | PCIM_BIOS_ENABLE);
5578 case SYS_RES_IOPORT:
5579 case SYS_RES_MEMORY:
5580 error = PCI_ENABLE_IO(dev, child, type);
5588 pci_deactivate_resource(device_t dev, device_t child, int type,
5589 int rid, struct resource *r)
5591 struct pci_devinfo *dinfo;
5594 error = bus_generic_deactivate_resource(dev, child, type, rid, r);
5598 /* Disable decoding for device ROMs. */
5599 if (device_get_parent(child) == dev) {
5600 dinfo = device_get_ivars(child);
5601 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5602 pci_write_bar(child, pci_find_bar(child, rid),
5609 pci_child_deleted(device_t dev, device_t child)
5611 struct resource_list_entry *rle;
5612 struct resource_list *rl;
5613 struct pci_devinfo *dinfo;
5615 dinfo = device_get_ivars(child);
5616 rl = &dinfo->resources;
5618 EVENTHANDLER_INVOKE(pci_delete_device, child);
5620 /* Turn off access to resources we're about to free */
5621 if (bus_child_present(child) != 0) {
5622 pci_write_config(child, PCIR_COMMAND, pci_read_config(child,
5623 PCIR_COMMAND, 2) & ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2);
5625 pci_disable_busmaster(child);
5628 /* Free all allocated resources */
5629 STAILQ_FOREACH(rle, rl, link) {
5631 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5632 resource_list_busy(rl, rle->type, rle->rid)) {
5633 pci_printf(&dinfo->cfg,
5634 "Resource still owned, oops. "
5635 "(type=%d, rid=%d, addr=%lx)\n",
5636 rle->type, rle->rid,
5637 rman_get_start(rle->res));
5638 bus_release_resource(child, rle->type, rle->rid,
5641 resource_list_unreserve(rl, dev, child, rle->type,
5645 resource_list_free(rl);
5651 pci_delete_resource(device_t dev, device_t child, int type, int rid)
5653 struct pci_devinfo *dinfo;
5654 struct resource_list *rl;
5655 struct resource_list_entry *rle;
5657 if (device_get_parent(child) != dev)
5660 dinfo = device_get_ivars(child);
5661 rl = &dinfo->resources;
5662 rle = resource_list_find(rl, type, rid);
5667 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5668 resource_list_busy(rl, type, rid)) {
5669 device_printf(dev, "delete_resource: "
5670 "Resource still owned by child, oops. "
5671 "(type=%d, rid=%d, addr=%jx)\n",
5672 type, rid, rman_get_start(rle->res));
5675 resource_list_unreserve(rl, dev, child, type, rid);
5677 resource_list_delete(rl, type, rid);
5680 struct resource_list *
5681 pci_get_resource_list (device_t dev, device_t child)
5683 struct pci_devinfo *dinfo = device_get_ivars(child);
5685 return (&dinfo->resources);
5689 bus_dma_tag_t acpi_iommu_get_dma_tag(device_t dev, device_t child);
5691 pci_get_dma_tag(device_t bus, device_t dev)
5694 struct pci_softc *sc;
5696 if (device_get_parent(dev) == bus) {
5697 /* try iommu and return if it works */
5698 tag = acpi_iommu_get_dma_tag(bus, dev);
5702 sc = device_get_softc(bus);
5703 tag = sc->sc_dma_tag;
5709 pci_get_dma_tag(device_t bus, device_t dev)
5711 struct pci_softc *sc = device_get_softc(bus);
5713 return (sc->sc_dma_tag);
5718 pci_read_config_method(device_t dev, device_t child, int reg, int width)
5720 struct pci_devinfo *dinfo = device_get_ivars(child);
5721 pcicfgregs *cfg = &dinfo->cfg;
5725 * SR-IOV VFs don't implement the VID or DID registers, so we have to
5726 * emulate them here.
5728 if (cfg->flags & PCICFG_VF) {
5729 if (reg == PCIR_VENDOR) {
5732 return (cfg->device << 16 | cfg->vendor);
5734 return (cfg->vendor);
5736 return (cfg->vendor & 0xff);
5738 return (0xffffffff);
5740 } else if (reg == PCIR_DEVICE) {
5742 /* Note that an unaligned 4-byte read is an error. */
5744 return (cfg->device);
5746 return (cfg->device & 0xff);
5748 return (0xffffffff);
5754 return (PCIB_READ_CONFIG(device_get_parent(dev),
5755 cfg->bus, cfg->slot, cfg->func, reg, width));
5759 pci_write_config_method(device_t dev, device_t child, int reg,
5760 uint32_t val, int width)
5762 struct pci_devinfo *dinfo = device_get_ivars(child);
5763 pcicfgregs *cfg = &dinfo->cfg;
5765 PCIB_WRITE_CONFIG(device_get_parent(dev),
5766 cfg->bus, cfg->slot, cfg->func, reg, val, width);
5770 pci_child_location_str_method(device_t dev, device_t child, char *buf,
5774 snprintf(buf, buflen, "slot=%d function=%d dbsf=pci%d:%d:%d:%d",
5775 pci_get_slot(child), pci_get_function(child), pci_get_domain(child),
5776 pci_get_bus(child), pci_get_slot(child), pci_get_function(child));
5781 pci_child_pnpinfo_str_method(device_t dev, device_t child, char *buf,
5784 struct pci_devinfo *dinfo;
5787 dinfo = device_get_ivars(child);
5789 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x "
5790 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device,
5791 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass,
5797 pci_assign_interrupt_method(device_t dev, device_t child)
5799 struct pci_devinfo *dinfo = device_get_ivars(child);
5800 pcicfgregs *cfg = &dinfo->cfg;
5802 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child,
5807 pci_lookup(void *arg, const char *name, device_t *dev)
5811 int domain, bus, slot, func;
5817 * Accept pciconf-style selectors of either pciD:B:S:F or
5818 * pciB:S:F. In the latter case, the domain is assumed to
5821 if (strncmp(name, "pci", 3) != 0)
5823 val = strtol(name + 3, &end, 10);
5824 if (val < 0 || val > INT_MAX || *end != ':')
5827 val = strtol(end + 1, &end, 10);
5828 if (val < 0 || val > INT_MAX || *end != ':')
5831 val = strtol(end + 1, &end, 10);
5832 if (val < 0 || val > INT_MAX)
5836 val = strtol(end + 1, &end, 10);
5837 if (val < 0 || val > INT_MAX || *end != '\0')
5840 } else if (*end == '\0') {
5848 if (domain > PCI_DOMAINMAX || bus > PCI_BUSMAX || slot > PCI_SLOTMAX ||
5849 func > PCIE_ARI_FUNCMAX || (slot != 0 && func > PCI_FUNCMAX))
5852 *dev = pci_find_dbsf(domain, bus, slot, func);
5856 pci_modevent(module_t mod, int what, void *arg)
5858 static struct cdev *pci_cdev;
5859 static eventhandler_tag tag;
5863 STAILQ_INIT(&pci_devq);
5865 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644,
5867 pci_load_vendor_data();
5868 tag = EVENTHANDLER_REGISTER(dev_lookup, pci_lookup, NULL,
5874 EVENTHANDLER_DEREGISTER(dev_lookup, tag);
5875 destroy_dev(pci_cdev);
5883 pci_cfg_restore_pcie(device_t dev, struct pci_devinfo *dinfo)
5885 #define WREG(n, v) pci_write_config(dev, pos + (n), (v), 2)
5886 struct pcicfg_pcie *cfg;
5889 cfg = &dinfo->cfg.pcie;
5890 pos = cfg->pcie_location;
5892 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
5894 WREG(PCIER_DEVICE_CTL, cfg->pcie_device_ctl);
5896 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5897 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
5898 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
5899 WREG(PCIER_LINK_CTL, cfg->pcie_link_ctl);
5901 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5902 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
5903 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
5904 WREG(PCIER_SLOT_CTL, cfg->pcie_slot_ctl);
5906 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5907 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
5908 WREG(PCIER_ROOT_CTL, cfg->pcie_root_ctl);
5911 WREG(PCIER_DEVICE_CTL2, cfg->pcie_device_ctl2);
5912 WREG(PCIER_LINK_CTL2, cfg->pcie_link_ctl2);
5913 WREG(PCIER_SLOT_CTL2, cfg->pcie_slot_ctl2);
5919 pci_cfg_restore_pcix(device_t dev, struct pci_devinfo *dinfo)
5921 pci_write_config(dev, dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND,
5922 dinfo->cfg.pcix.pcix_command, 2);
5926 pci_cfg_restore(device_t dev, struct pci_devinfo *dinfo)
5930 * Restore the device to full power mode. We must do this
5931 * before we restore the registers because moving from D3 to
5932 * D0 will cause the chip's BARs and some other registers to
5933 * be reset to some unknown power on reset values. Cut down
5934 * the noise on boot by doing nothing if we are already in
5937 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0)
5938 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
5939 pci_write_config(dev, PCIR_INTLINE, dinfo->cfg.intline, 1);
5940 pci_write_config(dev, PCIR_INTPIN, dinfo->cfg.intpin, 1);
5941 pci_write_config(dev, PCIR_CACHELNSZ, dinfo->cfg.cachelnsz, 1);
5942 pci_write_config(dev, PCIR_LATTIMER, dinfo->cfg.lattimer, 1);
5943 pci_write_config(dev, PCIR_PROGIF, dinfo->cfg.progif, 1);
5944 pci_write_config(dev, PCIR_REVID, dinfo->cfg.revid, 1);
5945 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
5946 case PCIM_HDRTYPE_NORMAL:
5947 pci_write_config(dev, PCIR_MINGNT, dinfo->cfg.mingnt, 1);
5948 pci_write_config(dev, PCIR_MAXLAT, dinfo->cfg.maxlat, 1);
5950 case PCIM_HDRTYPE_BRIDGE:
5951 pci_write_config(dev, PCIR_SECLAT_1,
5952 dinfo->cfg.bridge.br_seclat, 1);
5953 pci_write_config(dev, PCIR_SUBBUS_1,
5954 dinfo->cfg.bridge.br_subbus, 1);
5955 pci_write_config(dev, PCIR_SECBUS_1,
5956 dinfo->cfg.bridge.br_secbus, 1);
5957 pci_write_config(dev, PCIR_PRIBUS_1,
5958 dinfo->cfg.bridge.br_pribus, 1);
5959 pci_write_config(dev, PCIR_BRIDGECTL_1,
5960 dinfo->cfg.bridge.br_control, 2);
5962 case PCIM_HDRTYPE_CARDBUS:
5963 pci_write_config(dev, PCIR_SECLAT_2,
5964 dinfo->cfg.bridge.br_seclat, 1);
5965 pci_write_config(dev, PCIR_SUBBUS_2,
5966 dinfo->cfg.bridge.br_subbus, 1);
5967 pci_write_config(dev, PCIR_SECBUS_2,
5968 dinfo->cfg.bridge.br_secbus, 1);
5969 pci_write_config(dev, PCIR_PRIBUS_2,
5970 dinfo->cfg.bridge.br_pribus, 1);
5971 pci_write_config(dev, PCIR_BRIDGECTL_2,
5972 dinfo->cfg.bridge.br_control, 2);
5975 pci_restore_bars(dev);
5977 if ((dinfo->cfg.hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_BRIDGE)
5978 pci_write_config(dev, PCIR_COMMAND, dinfo->cfg.cmdreg, 2);
5981 * Restore extended capabilities for PCI-Express and PCI-X
5983 if (dinfo->cfg.pcie.pcie_location != 0)
5984 pci_cfg_restore_pcie(dev, dinfo);
5985 if (dinfo->cfg.pcix.pcix_location != 0)
5986 pci_cfg_restore_pcix(dev, dinfo);
5988 /* Restore MSI and MSI-X configurations if they are present. */
5989 if (dinfo->cfg.msi.msi_location != 0)
5990 pci_resume_msi(dev);
5991 if (dinfo->cfg.msix.msix_location != 0)
5992 pci_resume_msix(dev);
5995 if (dinfo->cfg.iov != NULL)
5996 pci_iov_cfg_restore(dev, dinfo);
6001 pci_cfg_save_pcie(device_t dev, struct pci_devinfo *dinfo)
6003 #define RREG(n) pci_read_config(dev, pos + (n), 2)
6004 struct pcicfg_pcie *cfg;
6007 cfg = &dinfo->cfg.pcie;
6008 pos = cfg->pcie_location;
6010 cfg->pcie_flags = RREG(PCIER_FLAGS);
6012 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
6014 cfg->pcie_device_ctl = RREG(PCIER_DEVICE_CTL);
6016 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6017 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
6018 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
6019 cfg->pcie_link_ctl = RREG(PCIER_LINK_CTL);
6021 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6022 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
6023 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
6024 cfg->pcie_slot_ctl = RREG(PCIER_SLOT_CTL);
6026 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6027 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
6028 cfg->pcie_root_ctl = RREG(PCIER_ROOT_CTL);
6031 cfg->pcie_device_ctl2 = RREG(PCIER_DEVICE_CTL2);
6032 cfg->pcie_link_ctl2 = RREG(PCIER_LINK_CTL2);
6033 cfg->pcie_slot_ctl2 = RREG(PCIER_SLOT_CTL2);
6039 pci_cfg_save_pcix(device_t dev, struct pci_devinfo *dinfo)
6041 dinfo->cfg.pcix.pcix_command = pci_read_config(dev,
6042 dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND, 2);
6046 pci_cfg_save(device_t dev, struct pci_devinfo *dinfo, int setstate)
6052 * Some drivers apparently write to these registers w/o updating our
6053 * cached copy. No harm happens if we update the copy, so do so here
6054 * so we can restore them. The COMMAND register is modified by the
6055 * bus w/o updating the cache. This should represent the normally
6056 * writable portion of the 'defined' part of type 0/1/2 headers.
6058 dinfo->cfg.vendor = pci_read_config(dev, PCIR_VENDOR, 2);
6059 dinfo->cfg.device = pci_read_config(dev, PCIR_DEVICE, 2);
6060 dinfo->cfg.cmdreg = pci_read_config(dev, PCIR_COMMAND, 2);
6061 dinfo->cfg.intline = pci_read_config(dev, PCIR_INTLINE, 1);
6062 dinfo->cfg.intpin = pci_read_config(dev, PCIR_INTPIN, 1);
6063 dinfo->cfg.cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
6064 dinfo->cfg.lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
6065 dinfo->cfg.baseclass = pci_read_config(dev, PCIR_CLASS, 1);
6066 dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1);
6067 dinfo->cfg.progif = pci_read_config(dev, PCIR_PROGIF, 1);
6068 dinfo->cfg.revid = pci_read_config(dev, PCIR_REVID, 1);
6069 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
6070 case PCIM_HDRTYPE_NORMAL:
6071 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_0, 2);
6072 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_0, 2);
6073 dinfo->cfg.mingnt = pci_read_config(dev, PCIR_MINGNT, 1);
6074 dinfo->cfg.maxlat = pci_read_config(dev, PCIR_MAXLAT, 1);
6076 case PCIM_HDRTYPE_BRIDGE:
6077 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6079 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6081 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6083 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6085 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6086 PCIR_BRIDGECTL_1, 2);
6088 case PCIM_HDRTYPE_CARDBUS:
6089 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6091 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6093 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6095 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6097 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6098 PCIR_BRIDGECTL_2, 2);
6099 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_2, 2);
6100 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_2, 2);
6104 if (dinfo->cfg.pcie.pcie_location != 0)
6105 pci_cfg_save_pcie(dev, dinfo);
6107 if (dinfo->cfg.pcix.pcix_location != 0)
6108 pci_cfg_save_pcix(dev, dinfo);
6111 if (dinfo->cfg.iov != NULL)
6112 pci_iov_cfg_save(dev, dinfo);
6116 * don't set the state for display devices, base peripherals and
6117 * memory devices since bad things happen when they are powered down.
6118 * We should (a) have drivers that can easily detach and (b) use
6119 * generic drivers for these devices so that some device actually
6120 * attaches. We need to make sure that when we implement (a) we don't
6121 * power the device down on a reattach.
6123 cls = pci_get_class(dev);
6126 switch (pci_do_power_nodriver)
6128 case 0: /* NO powerdown at all */
6130 case 1: /* Conservative about what to power down */
6131 if (cls == PCIC_STORAGE)
6134 case 2: /* Aggressive about what to power down */
6135 if (cls == PCIC_DISPLAY || cls == PCIC_MEMORY ||
6136 cls == PCIC_BASEPERIPH)
6139 case 3: /* Power down everything */
6143 * PCI spec says we can only go into D3 state from D0 state.
6144 * Transition from D[12] into D0 before going to D3 state.
6146 ps = pci_get_powerstate(dev);
6147 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6148 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6149 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3)
6150 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6153 /* Wrapper APIs suitable for device driver use. */
6155 pci_save_state(device_t dev)
6157 struct pci_devinfo *dinfo;
6159 dinfo = device_get_ivars(dev);
6160 pci_cfg_save(dev, dinfo, 0);
6164 pci_restore_state(device_t dev)
6166 struct pci_devinfo *dinfo;
6168 dinfo = device_get_ivars(dev);
6169 pci_cfg_restore(dev, dinfo);
6173 pci_get_id_method(device_t dev, device_t child, enum pci_id_type type,
6177 return (PCIB_GET_ID(device_get_parent(dev), child, type, id));
6180 /* Find the upstream port of a given PCI device in a root complex. */
6182 pci_find_pcie_root_port(device_t dev)
6184 struct pci_devinfo *dinfo;
6185 devclass_t pci_class;
6188 pci_class = devclass_find("pci");
6189 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class,
6190 ("%s: non-pci device %s", __func__, device_get_nameunit(dev)));
6193 * Walk the bridge hierarchy until we find a PCI-e root
6194 * port or a non-PCI device.
6197 bus = device_get_parent(dev);
6198 KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
6199 device_get_nameunit(dev)));
6201 pcib = device_get_parent(bus);
6202 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
6203 device_get_nameunit(bus)));
6206 * pcib's parent must be a PCI bus for this to be a
6209 if (device_get_devclass(device_get_parent(pcib)) != pci_class)
6212 dinfo = device_get_ivars(pcib);
6213 if (dinfo->cfg.pcie.pcie_location != 0 &&
6214 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT)
6222 * Wait for pending transactions to complete on a PCI-express function.
6224 * The maximum delay is specified in milliseconds in max_delay. Note
6225 * that this function may sleep.
6227 * Returns true if the function is idle and false if the timeout is
6228 * exceeded. If dev is not a PCI-express function, this returns true.
6231 pcie_wait_for_pending_transactions(device_t dev, u_int max_delay)
6233 struct pci_devinfo *dinfo = device_get_ivars(dev);
6237 cap = dinfo->cfg.pcie.pcie_location;
6241 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6242 while (sta & PCIEM_STA_TRANSACTION_PND) {
6246 /* Poll once every 100 milliseconds up to the timeout. */
6247 if (max_delay > 100) {
6248 pause_sbt("pcietp", 100 * SBT_1MS, 0, C_HARDCLOCK);
6251 pause_sbt("pcietp", max_delay * SBT_1MS, 0,
6255 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6262 * Determine the maximum Completion Timeout in microseconds.
6264 * For non-PCI-express functions this returns 0.
6267 pcie_get_max_completion_timeout(device_t dev)
6269 struct pci_devinfo *dinfo = device_get_ivars(dev);
6272 cap = dinfo->cfg.pcie.pcie_location;
6277 * Functions using the 1.x spec use the default timeout range of
6278 * 50 microseconds to 50 milliseconds. Functions that do not
6279 * support programmable timeouts also use this range.
6281 if ((dinfo->cfg.pcie.pcie_flags & PCIEM_FLAGS_VERSION) < 2 ||
6282 (pci_read_config(dev, cap + PCIER_DEVICE_CAP2, 4) &
6283 PCIEM_CAP2_COMP_TIMO_RANGES) == 0)
6286 switch (pci_read_config(dev, cap + PCIER_DEVICE_CTL2, 2) &
6287 PCIEM_CTL2_COMP_TIMO_VAL) {
6288 case PCIEM_CTL2_COMP_TIMO_100US:
6290 case PCIEM_CTL2_COMP_TIMO_10MS:
6292 case PCIEM_CTL2_COMP_TIMO_55MS:
6294 case PCIEM_CTL2_COMP_TIMO_210MS:
6295 return (210 * 1000);
6296 case PCIEM_CTL2_COMP_TIMO_900MS:
6297 return (900 * 1000);
6298 case PCIEM_CTL2_COMP_TIMO_3500MS:
6299 return (3500 * 1000);
6300 case PCIEM_CTL2_COMP_TIMO_13S:
6301 return (13 * 1000 * 1000);
6302 case PCIEM_CTL2_COMP_TIMO_64S:
6303 return (64 * 1000 * 1000);
6310 pcie_apei_error(device_t dev, int sev, uint8_t *aerp)
6312 struct pci_devinfo *dinfo = device_get_ivars(dev);
6318 if (sev == PCIEM_STA_CORRECTABLE_ERROR)
6320 else if (sev == PCIEM_STA_NON_FATAL_ERROR)
6321 s = "Uncorrectable (Non-Fatal)";
6323 s = "Uncorrectable (Fatal)";
6324 device_printf(dev, "%s PCIe error reported by APEI\n", s);
6326 if (sev == PCIEM_STA_CORRECTABLE_ERROR) {
6327 r = le32dec(aerp + PCIR_AER_COR_STATUS);
6328 r1 = le32dec(aerp + PCIR_AER_COR_MASK);
6330 r = le32dec(aerp + PCIR_AER_UC_STATUS);
6331 r1 = le32dec(aerp + PCIR_AER_UC_MASK);
6333 device_printf(dev, "status 0x%08x mask 0x%08x", r, r1);
6334 if (sev != PCIEM_STA_CORRECTABLE_ERROR) {
6335 r = le32dec(aerp + PCIR_AER_UC_SEVERITY);
6336 rs = le16dec(aerp + PCIR_AER_CAP_CONTROL);
6337 printf(" severity 0x%08x first %d\n",
6343 /* As kind of recovery just report and clear the error statuses. */
6344 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
6345 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6347 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
6348 device_printf(dev, "Clearing UC AER errors 0x%08x\n", r);
6351 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6353 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
6354 device_printf(dev, "Clearing COR AER errors 0x%08x\n", r);
6357 if (dinfo->cfg.pcie.pcie_location != 0) {
6358 rs = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
6359 PCIER_DEVICE_STA, 2);
6360 if ((rs & (PCIEM_STA_CORRECTABLE_ERROR |
6361 PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
6362 PCIEM_STA_UNSUPPORTED_REQ)) != 0) {
6363 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
6364 PCIER_DEVICE_STA, rs, 2);
6365 device_printf(dev, "Clearing PCIe errors 0x%04x\n", rs);
6371 * Perform a Function Level Reset (FLR) on a device.
6373 * This function first waits for any pending transactions to complete
6374 * within the timeout specified by max_delay. If transactions are
6375 * still pending, the function will return false without attempting a
6378 * If dev is not a PCI-express function or does not support FLR, this
6379 * function returns false.
6381 * Note that no registers are saved or restored. The caller is
6382 * responsible for saving and restoring any registers including
6383 * PCI-standard registers via pci_save_state() and
6384 * pci_restore_state().
6387 pcie_flr(device_t dev, u_int max_delay, bool force)
6389 struct pci_devinfo *dinfo = device_get_ivars(dev);
6394 cap = dinfo->cfg.pcie.pcie_location;
6398 if (!(pci_read_config(dev, cap + PCIER_DEVICE_CAP, 4) & PCIEM_CAP_FLR))
6402 * Disable busmastering to prevent generation of new
6403 * transactions while waiting for the device to go idle. If
6404 * the idle timeout fails, the command register is restored
6405 * which will re-enable busmastering.
6407 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
6408 pci_write_config(dev, PCIR_COMMAND, cmd & ~(PCIM_CMD_BUSMASTEREN), 2);
6409 if (!pcie_wait_for_pending_transactions(dev, max_delay)) {
6411 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
6414 pci_printf(&dinfo->cfg,
6415 "Resetting with transactions pending after %d ms\n",
6419 * Extend the post-FLR delay to cover the maximum
6420 * Completion Timeout delay of anything in flight
6421 * during the FLR delay. Enforce a minimum delay of
6424 compl_delay = pcie_get_max_completion_timeout(dev) / 1000;
6425 if (compl_delay < 10)
6430 /* Initiate the reset. */
6431 ctl = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
6432 pci_write_config(dev, cap + PCIER_DEVICE_CTL, ctl |
6433 PCIEM_CTL_INITIATE_FLR, 2);
6435 /* Wait for 100ms. */
6436 pause_sbt("pcieflr", (100 + compl_delay) * SBT_1MS, 0, C_HARDCLOCK);
6438 if (pci_read_config(dev, cap + PCIER_DEVICE_STA, 2) &
6439 PCIEM_STA_TRANSACTION_PND)
6440 pci_printf(&dinfo->cfg, "Transactions pending after FLR!\n");
6445 * Attempt a power-management reset by cycling the device in/out of D3
6446 * state. PCI spec says we can only go into D3 state from D0 state.
6447 * Transition from D[12] into D0 before going to D3 state.
6450 pci_power_reset(device_t dev)
6454 ps = pci_get_powerstate(dev);
6455 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6456 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6457 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6458 pci_set_powerstate(dev, ps);
6463 * Try link drop and retrain of the downstream port of upstream
6464 * switch, for PCIe. According to the PCIe 3.0 spec 6.6.1, this must
6465 * cause Conventional Hot reset of the device in the slot.
6466 * Alternative, for PCIe, could be the secondary bus reset initiatied
6467 * on the upstream switch PCIR_BRIDGECTL_1, bit 6.
6470 pcie_link_reset(device_t port, int pcie_location)
6474 v = pci_read_config(port, pcie_location + PCIER_LINK_CTL, 2);
6475 v |= PCIEM_LINK_CTL_LINK_DIS;
6476 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6477 pause_sbt("pcier1", mstosbt(20), 0, 0);
6478 v &= ~PCIEM_LINK_CTL_LINK_DIS;
6479 v |= PCIEM_LINK_CTL_RETRAIN_LINK;
6480 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6481 pause_sbt("pcier2", mstosbt(100), 0, 0); /* 100 ms */
6482 v = pci_read_config(port, pcie_location + PCIER_LINK_STA, 2);
6483 return ((v & PCIEM_LINK_STA_TRAINING) != 0 ? ETIMEDOUT : 0);
6487 pci_reset_post(device_t dev, device_t child)
6490 if (dev == device_get_parent(child))
6491 pci_restore_state(child);
6496 pci_reset_prepare(device_t dev, device_t child)
6499 if (dev == device_get_parent(child))
6500 pci_save_state(child);
6505 pci_reset_child(device_t dev, device_t child, int flags)
6509 if (dev == NULL || device_get_parent(child) != dev)
6511 if ((flags & DEVF_RESET_DETACH) != 0) {
6512 error = device_get_state(child) == DS_ATTACHED ?
6513 device_detach(child) : 0;
6515 error = BUS_SUSPEND_CHILD(dev, child);
6518 if (!pcie_flr(child, 1000, false)) {
6519 error = BUS_RESET_PREPARE(dev, child);
6521 pci_power_reset(child);
6522 BUS_RESET_POST(dev, child);
6524 if ((flags & DEVF_RESET_DETACH) != 0)
6525 device_probe_and_attach(child);
6527 BUS_RESUME_CHILD(dev, child);
6532 const struct pci_device_table *
6533 pci_match_device(device_t child, const struct pci_device_table *id, size_t nelt)
6536 uint16_t vendor, device, subvendor, subdevice, class, subclass, revid;
6538 vendor = pci_get_vendor(child);
6539 device = pci_get_device(child);
6540 subvendor = pci_get_subvendor(child);
6541 subdevice = pci_get_subdevice(child);
6542 class = pci_get_class(child);
6543 subclass = pci_get_subclass(child);
6544 revid = pci_get_revid(child);
6545 while (nelt-- > 0) {
6547 if (id->match_flag_vendor)
6548 match &= vendor == id->vendor;
6549 if (id->match_flag_device)
6550 match &= device == id->device;
6551 if (id->match_flag_subvendor)
6552 match &= subvendor == id->subvendor;
6553 if (id->match_flag_subdevice)
6554 match &= subdevice == id->subdevice;
6555 if (id->match_flag_class)
6556 match &= class == id->class_id;
6557 if (id->match_flag_subclass)
6558 match &= subclass == id->subclass;
6559 if (id->match_flag_revid)
6560 match &= revid == id->revid;
6569 pci_print_faulted_dev_name(const struct pci_devinfo *dinfo)
6571 const char *dev_name;
6574 dev = dinfo->cfg.dev;
6575 printf("pci%d:%d:%d:%d", dinfo->cfg.domain, dinfo->cfg.bus,
6576 dinfo->cfg.slot, dinfo->cfg.func);
6577 dev_name = device_get_name(dev);
6578 if (dev_name != NULL)
6579 printf(" (%s%d)", dev_name, device_get_unit(dev));
6583 pci_print_faulted_dev(void)
6585 struct pci_devinfo *dinfo;
6591 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6592 dev = dinfo->cfg.dev;
6593 status = pci_read_config(dev, PCIR_STATUS, 2);
6594 status &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6595 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6596 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6598 pci_print_faulted_dev_name(dinfo);
6599 printf(" error 0x%04x\n", status);
6601 if (dinfo->cfg.pcie.pcie_location != 0) {
6602 status = pci_read_config(dev,
6603 dinfo->cfg.pcie.pcie_location +
6604 PCIER_DEVICE_STA, 2);
6605 if ((status & (PCIEM_STA_CORRECTABLE_ERROR |
6606 PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
6607 PCIEM_STA_UNSUPPORTED_REQ)) != 0) {
6608 pci_print_faulted_dev_name(dinfo);
6609 printf(" PCIe DEVCTL 0x%04x DEVSTA 0x%04x\n",
6610 pci_read_config(dev,
6611 dinfo->cfg.pcie.pcie_location +
6612 PCIER_DEVICE_CTL, 2),
6616 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
6617 r1 = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6618 r2 = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6619 if (r1 != 0 || r2 != 0) {
6620 pci_print_faulted_dev_name(dinfo);
6621 printf(" AER UC 0x%08x Mask 0x%08x Svr 0x%08x\n"
6622 " COR 0x%08x Mask 0x%08x Ctl 0x%08x\n",
6623 r1, pci_read_config(dev, aer +
6624 PCIR_AER_UC_MASK, 4),
6625 pci_read_config(dev, aer +
6626 PCIR_AER_UC_SEVERITY, 4),
6627 r2, pci_read_config(dev, aer +
6628 PCIR_AER_COR_MASK, 4),
6629 pci_read_config(dev, aer +
6630 PCIR_AER_CAP_CONTROL, 4));
6631 for (i = 0; i < 4; i++) {
6632 r1 = pci_read_config(dev, aer +
6633 PCIR_AER_HEADER_LOG + i * 4, 4);
6634 printf(" HL%d: 0x%08x\n", i, r1);
6642 DB_SHOW_COMMAND(pcierr, pci_print_faulted_dev_db)
6645 pci_print_faulted_dev();
6649 db_clear_pcie_errors(const struct pci_devinfo *dinfo)
6655 dev = dinfo->cfg.dev;
6656 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
6657 PCIER_DEVICE_STA, 2);
6658 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
6659 PCIER_DEVICE_STA, r, 2);
6661 if (pci_find_extcap(dev, PCIZ_AER, &aer) != 0)
6663 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6665 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
6666 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6668 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
6671 DB_COMMAND(pci_clearerr, db_pci_clearerr)
6673 struct pci_devinfo *dinfo;
6675 uint16_t status, status1;
6677 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6678 dev = dinfo->cfg.dev;
6679 status1 = status = pci_read_config(dev, PCIR_STATUS, 2);
6680 status1 &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6681 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6682 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6685 pci_write_config(dev, PCIR_STATUS, status, 2);
6687 if (dinfo->cfg.pcie.pcie_location != 0)
6688 db_clear_pcie_errors(dinfo);