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("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/limits.h>
41 #include <sys/linker.h>
42 #include <sys/fcntl.h>
44 #include <sys/kernel.h>
45 #include <sys/queue.h>
46 #include <sys/sysctl.h>
47 #include <sys/endian.h>
51 #include <vm/vm_extern.h>
54 #include <machine/bus.h>
56 #include <machine/resource.h>
57 #include <machine/stdarg.h>
59 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
60 #include <machine/intr_machdep.h>
63 #include <sys/pciio.h>
64 #include <dev/pci/pcireg.h>
65 #include <dev/pci/pcivar.h>
66 #include <dev/pci/pci_private.h>
70 #include <dev/pci/pci_iov_private.h>
73 #include <dev/usb/controller/xhcireg.h>
74 #include <dev/usb/controller/ehcireg.h>
75 #include <dev/usb/controller/ohcireg.h>
76 #include <dev/usb/controller/uhcireg.h>
81 #define PCIR_IS_BIOS(cfg, reg) \
82 (((cfg)->hdrtype == PCIM_HDRTYPE_NORMAL && reg == PCIR_BIOS) || \
83 ((cfg)->hdrtype == PCIM_HDRTYPE_BRIDGE && reg == PCIR_BIOS_1))
85 static int pci_has_quirk(uint32_t devid, int quirk);
86 static pci_addr_t pci_mapbase(uint64_t mapreg);
87 static const char *pci_maptype(uint64_t mapreg);
88 static int pci_maprange(uint64_t mapreg);
89 static pci_addr_t pci_rombase(uint64_t mapreg);
90 static int pci_romsize(uint64_t testval);
91 static void pci_fixancient(pcicfgregs *cfg);
92 static int pci_printf(pcicfgregs *cfg, const char *fmt, ...);
94 static int pci_porten(device_t dev);
95 static int pci_memen(device_t dev);
96 static void pci_assign_interrupt(device_t bus, device_t dev,
98 static int pci_add_map(device_t bus, device_t dev, int reg,
99 struct resource_list *rl, int force, int prefetch);
100 static int pci_probe(device_t dev);
101 static void pci_load_vendor_data(void);
102 static int pci_describe_parse_line(char **ptr, int *vendor,
103 int *device, char **desc);
104 static char *pci_describe_device(device_t dev);
105 static int pci_modevent(module_t mod, int what, void *arg);
106 static void pci_hdrtypedata(device_t pcib, int b, int s, int f,
108 static void pci_read_cap(device_t pcib, pcicfgregs *cfg);
109 static int pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg,
110 int reg, uint32_t *data);
112 static int pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg,
113 int reg, uint32_t data);
115 static void pci_read_vpd(device_t pcib, pcicfgregs *cfg);
116 static void pci_mask_msix(device_t dev, u_int index);
117 static void pci_unmask_msix(device_t dev, u_int index);
118 static int pci_msi_blacklisted(void);
119 static int pci_msix_blacklisted(void);
120 static void pci_resume_msi(device_t dev);
121 static void pci_resume_msix(device_t dev);
122 static int pci_remap_intr_method(device_t bus, device_t dev,
124 static void pci_hint_device_unit(device_t acdev, device_t child,
125 const char *name, int *unitp);
126 static int pci_reset_post(device_t dev, device_t child);
127 static int pci_reset_prepare(device_t dev, device_t child);
128 static int pci_reset_child(device_t dev, device_t child,
131 static int pci_get_id_method(device_t dev, device_t child,
132 enum pci_id_type type, uintptr_t *rid);
134 static struct pci_devinfo * pci_fill_devinfo(device_t pcib, device_t bus, int d,
135 int b, int s, int f, uint16_t vid, uint16_t did);
137 static device_method_t pci_methods[] = {
138 /* Device interface */
139 DEVMETHOD(device_probe, pci_probe),
140 DEVMETHOD(device_attach, pci_attach),
141 DEVMETHOD(device_detach, pci_detach),
142 DEVMETHOD(device_shutdown, bus_generic_shutdown),
143 DEVMETHOD(device_suspend, bus_generic_suspend),
144 DEVMETHOD(device_resume, pci_resume),
147 DEVMETHOD(bus_print_child, pci_print_child),
148 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
149 DEVMETHOD(bus_read_ivar, pci_read_ivar),
150 DEVMETHOD(bus_write_ivar, pci_write_ivar),
151 DEVMETHOD(bus_driver_added, pci_driver_added),
152 DEVMETHOD(bus_setup_intr, pci_setup_intr),
153 DEVMETHOD(bus_teardown_intr, pci_teardown_intr),
154 DEVMETHOD(bus_reset_prepare, pci_reset_prepare),
155 DEVMETHOD(bus_reset_post, pci_reset_post),
156 DEVMETHOD(bus_reset_child, pci_reset_child),
158 DEVMETHOD(bus_get_dma_tag, pci_get_dma_tag),
159 DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
160 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
161 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
162 DEVMETHOD(bus_delete_resource, pci_delete_resource),
163 DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
164 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
165 DEVMETHOD(bus_release_resource, pci_release_resource),
166 DEVMETHOD(bus_activate_resource, pci_activate_resource),
167 DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource),
168 DEVMETHOD(bus_child_deleted, pci_child_deleted),
169 DEVMETHOD(bus_child_detached, pci_child_detached),
170 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
171 DEVMETHOD(bus_child_location_str, pci_child_location_str_method),
172 DEVMETHOD(bus_hint_device_unit, pci_hint_device_unit),
173 DEVMETHOD(bus_remap_intr, pci_remap_intr_method),
174 DEVMETHOD(bus_suspend_child, pci_suspend_child),
175 DEVMETHOD(bus_resume_child, pci_resume_child),
176 DEVMETHOD(bus_rescan, pci_rescan_method),
179 DEVMETHOD(pci_read_config, pci_read_config_method),
180 DEVMETHOD(pci_write_config, pci_write_config_method),
181 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
182 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
183 DEVMETHOD(pci_enable_io, pci_enable_io_method),
184 DEVMETHOD(pci_disable_io, pci_disable_io_method),
185 DEVMETHOD(pci_get_vpd_ident, pci_get_vpd_ident_method),
186 DEVMETHOD(pci_get_vpd_readonly, pci_get_vpd_readonly_method),
187 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
188 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
189 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
190 DEVMETHOD(pci_find_cap, pci_find_cap_method),
191 DEVMETHOD(pci_find_next_cap, pci_find_next_cap_method),
192 DEVMETHOD(pci_find_extcap, pci_find_extcap_method),
193 DEVMETHOD(pci_find_next_extcap, pci_find_next_extcap_method),
194 DEVMETHOD(pci_find_htcap, pci_find_htcap_method),
195 DEVMETHOD(pci_find_next_htcap, pci_find_next_htcap_method),
196 DEVMETHOD(pci_alloc_msi, pci_alloc_msi_method),
197 DEVMETHOD(pci_alloc_msix, pci_alloc_msix_method),
198 DEVMETHOD(pci_enable_msi, pci_enable_msi_method),
199 DEVMETHOD(pci_enable_msix, pci_enable_msix_method),
200 DEVMETHOD(pci_disable_msi, pci_disable_msi_method),
201 DEVMETHOD(pci_remap_msix, pci_remap_msix_method),
202 DEVMETHOD(pci_release_msi, pci_release_msi_method),
203 DEVMETHOD(pci_msi_count, pci_msi_count_method),
204 DEVMETHOD(pci_msix_count, pci_msix_count_method),
205 DEVMETHOD(pci_msix_pba_bar, pci_msix_pba_bar_method),
206 DEVMETHOD(pci_msix_table_bar, pci_msix_table_bar_method),
207 DEVMETHOD(pci_get_id, pci_get_id_method),
208 DEVMETHOD(pci_alloc_devinfo, pci_alloc_devinfo_method),
209 DEVMETHOD(pci_child_added, pci_child_added_method),
211 DEVMETHOD(pci_iov_attach, pci_iov_attach_method),
212 DEVMETHOD(pci_iov_detach, pci_iov_detach_method),
213 DEVMETHOD(pci_create_iov_child, pci_create_iov_child_method),
219 DEFINE_CLASS_0(pci, pci_driver, pci_methods, sizeof(struct pci_softc));
221 static devclass_t pci_devclass;
222 DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, NULL);
223 MODULE_VERSION(pci, 1);
225 static char *pci_vendordata;
226 static size_t pci_vendordata_size;
229 uint32_t devid; /* Vendor/device of the card */
231 #define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */
232 #define PCI_QUIRK_DISABLE_MSI 2 /* Neither MSI nor MSI-X work */
233 #define PCI_QUIRK_ENABLE_MSI_VM 3 /* Older chipset in VM where MSI works */
234 #define PCI_QUIRK_UNMAP_REG 4 /* Ignore PCI map register */
235 #define PCI_QUIRK_DISABLE_MSIX 5 /* MSI-X doesn't work */
236 #define PCI_QUIRK_MSI_INTX_BUG 6 /* PCIM_CMD_INTxDIS disables MSI */
237 #define PCI_QUIRK_REALLOC_BAR 7 /* Can't allocate memory at the default address */
242 static const struct pci_quirk pci_quirks[] = {
243 /* The Intel 82371AB and 82443MX have a map register at offset 0x90. */
244 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 },
245 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 },
246 /* As does the Serverworks OSB4 (the SMBus mapping register) */
247 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 },
250 * MSI doesn't work with the ServerWorks CNB20-HE Host Bridge
251 * or the CMIC-SL (AKA ServerWorks GC_LE).
253 { 0x00141166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
254 { 0x00171166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
257 * MSI doesn't work on earlier Intel chipsets including
258 * E7500, E7501, E7505, 845, 865, 875/E7210, and 855.
260 { 0x25408086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
261 { 0x254c8086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
262 { 0x25508086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
263 { 0x25608086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
264 { 0x25708086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
265 { 0x25788086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
266 { 0x35808086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
269 * MSI doesn't work with devices behind the AMD 8131 HT-PCIX
272 { 0x74501022, PCI_QUIRK_DISABLE_MSI, 0, 0 },
275 * MSI-X allocation doesn't work properly for devices passed through
276 * by VMware up to at least ESXi 5.1.
278 { 0x079015ad, PCI_QUIRK_DISABLE_MSIX, 0, 0 }, /* PCI/PCI-X */
279 { 0x07a015ad, PCI_QUIRK_DISABLE_MSIX, 0, 0 }, /* PCIe */
282 * Some virtualization environments emulate an older chipset
283 * but support MSI just fine. QEMU uses the Intel 82440.
285 { 0x12378086, PCI_QUIRK_ENABLE_MSI_VM, 0, 0 },
288 * HPET MMIO base address may appear in Bar1 for AMD SB600 SMBus
289 * controller depending on SoftPciRst register (PM_IO 0x55 [7]).
290 * It prevents us from attaching hpet(4) when the bit is unset.
291 * Note this quirk only affects SB600 revision A13 and earlier.
292 * For SB600 A21 and later, firmware must set the bit to hide it.
293 * For SB700 and later, it is unused and hardcoded to zero.
295 { 0x43851002, PCI_QUIRK_UNMAP_REG, 0x14, 0 },
298 * Atheros AR8161/AR8162/E2200/E2400/E2500 Ethernet controllers have
299 * a bug that MSI interrupt does not assert if PCIM_CMD_INTxDIS bit
300 * of the command register is set.
302 { 0x10911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
303 { 0xE0911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
304 { 0xE0A11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
305 { 0xE0B11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
306 { 0x10901969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
309 * Broadcom BCM5714(S)/BCM5715(S)/BCM5780(S) Ethernet MACs don't
310 * issue MSI interrupts with PCIM_CMD_INTxDIS set either.
312 { 0x166814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714 */
313 { 0x166914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714S */
314 { 0x166a14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780 */
315 { 0x166b14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780S */
316 { 0x167814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715 */
317 { 0x167914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715S */
320 * HPE Gen 10 VGA has a memory range that can't be allocated in the
323 { 0x98741002, PCI_QUIRK_REALLOC_BAR, 0, 0 },
328 /* map register information */
329 #define PCI_MAPMEM 0x01 /* memory map */
330 #define PCI_MAPMEMP 0x02 /* prefetchable memory map */
331 #define PCI_MAPPORT 0x04 /* port map */
333 struct devlist pci_devq;
334 uint32_t pci_generation;
335 uint32_t pci_numdevs = 0;
336 static int pcie_chipset, pcix_chipset;
339 SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD, 0, "PCI bus tuning parameters");
341 static int pci_enable_io_modes = 1;
342 SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RWTUN,
343 &pci_enable_io_modes, 1,
344 "Enable I/O and memory bits in the config register. Some BIOSes do not"
345 " enable these bits correctly. We'd like to do this all the time, but"
346 " there are some peripherals that this causes problems with.");
348 static int pci_do_realloc_bars = 0;
349 SYSCTL_INT(_hw_pci, OID_AUTO, realloc_bars, CTLFLAG_RWTUN,
350 &pci_do_realloc_bars, 0,
351 "Attempt to allocate a new range for any BARs whose original "
352 "firmware-assigned ranges fail to allocate during the initial device scan.");
354 static int pci_do_power_nodriver = 0;
355 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_nodriver, CTLFLAG_RWTUN,
356 &pci_do_power_nodriver, 0,
357 "Place a function into D3 state when no driver attaches to it. 0 means"
358 " disable. 1 means conservatively place devices into D3 state. 2 means"
359 " aggressively place devices into D3 state. 3 means put absolutely"
360 " everything in D3 state.");
362 int pci_do_power_resume = 1;
363 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_resume, CTLFLAG_RWTUN,
364 &pci_do_power_resume, 1,
365 "Transition from D3 -> D0 on resume.");
367 int pci_do_power_suspend = 1;
368 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_suspend, CTLFLAG_RWTUN,
369 &pci_do_power_suspend, 1,
370 "Transition from D0 -> D3 on suspend.");
372 static int pci_do_msi = 1;
373 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msi, CTLFLAG_RWTUN, &pci_do_msi, 1,
374 "Enable support for MSI interrupts");
376 static int pci_do_msix = 1;
377 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msix, CTLFLAG_RWTUN, &pci_do_msix, 1,
378 "Enable support for MSI-X interrupts");
380 static int pci_msix_rewrite_table = 0;
381 SYSCTL_INT(_hw_pci, OID_AUTO, msix_rewrite_table, CTLFLAG_RWTUN,
382 &pci_msix_rewrite_table, 0,
383 "Rewrite entire MSI-X table when updating MSI-X entries");
385 static int pci_honor_msi_blacklist = 1;
386 SYSCTL_INT(_hw_pci, OID_AUTO, honor_msi_blacklist, CTLFLAG_RDTUN,
387 &pci_honor_msi_blacklist, 1, "Honor chipset blacklist for MSI/MSI-X");
389 #if defined(__i386__) || defined(__amd64__)
390 static int pci_usb_takeover = 1;
392 static int pci_usb_takeover = 0;
394 SYSCTL_INT(_hw_pci, OID_AUTO, usb_early_takeover, CTLFLAG_RDTUN,
395 &pci_usb_takeover, 1,
396 "Enable early takeover of USB controllers. Disable this if you depend on"
397 " BIOS emulation of USB devices, that is you use USB devices (like"
398 " keyboard or mouse) but do not load USB drivers");
400 static int pci_clear_bars;
401 SYSCTL_INT(_hw_pci, OID_AUTO, clear_bars, CTLFLAG_RDTUN, &pci_clear_bars, 0,
402 "Ignore firmware-assigned resources for BARs.");
404 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
405 static int pci_clear_buses;
406 SYSCTL_INT(_hw_pci, OID_AUTO, clear_buses, CTLFLAG_RDTUN, &pci_clear_buses, 0,
407 "Ignore firmware-assigned bus numbers.");
410 static int pci_enable_ari = 1;
411 SYSCTL_INT(_hw_pci, OID_AUTO, enable_ari, CTLFLAG_RDTUN, &pci_enable_ari,
412 0, "Enable support for PCIe Alternative RID Interpretation");
414 int pci_enable_aspm = 1;
415 SYSCTL_INT(_hw_pci, OID_AUTO, enable_aspm, CTLFLAG_RDTUN, &pci_enable_aspm,
416 0, "Enable support for PCIe Active State Power Management");
418 static int pci_clear_aer_on_attach = 0;
419 SYSCTL_INT(_hw_pci, OID_AUTO, clear_aer_on_attach, CTLFLAG_RWTUN,
420 &pci_clear_aer_on_attach, 0,
421 "Clear port and device AER state on driver attach");
424 pci_has_quirk(uint32_t devid, int quirk)
426 const struct pci_quirk *q;
428 for (q = &pci_quirks[0]; q->devid; q++) {
429 if (q->devid == devid && q->type == quirk)
435 /* Find a device_t by bus/slot/function in domain 0 */
438 pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func)
441 return (pci_find_dbsf(0, bus, slot, func));
444 /* Find a device_t by domain/bus/slot/function */
447 pci_find_dbsf(uint32_t domain, uint8_t bus, uint8_t slot, uint8_t func)
449 struct pci_devinfo *dinfo;
451 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
452 if ((dinfo->cfg.domain == domain) &&
453 (dinfo->cfg.bus == bus) &&
454 (dinfo->cfg.slot == slot) &&
455 (dinfo->cfg.func == func)) {
456 return (dinfo->cfg.dev);
463 /* Find a device_t by vendor/device ID */
466 pci_find_device(uint16_t vendor, uint16_t device)
468 struct pci_devinfo *dinfo;
470 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
471 if ((dinfo->cfg.vendor == vendor) &&
472 (dinfo->cfg.device == device)) {
473 return (dinfo->cfg.dev);
481 pci_find_class(uint8_t class, uint8_t subclass)
483 struct pci_devinfo *dinfo;
485 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
486 if (dinfo->cfg.baseclass == class &&
487 dinfo->cfg.subclass == subclass) {
488 return (dinfo->cfg.dev);
496 pci_printf(pcicfgregs *cfg, const char *fmt, ...)
501 retval = printf("pci%d:%d:%d:%d: ", cfg->domain, cfg->bus, cfg->slot,
504 retval += vprintf(fmt, ap);
509 /* return base address of memory or port map */
512 pci_mapbase(uint64_t mapreg)
515 if (PCI_BAR_MEM(mapreg))
516 return (mapreg & PCIM_BAR_MEM_BASE);
518 return (mapreg & PCIM_BAR_IO_BASE);
521 /* return map type of memory or port map */
524 pci_maptype(uint64_t mapreg)
527 if (PCI_BAR_IO(mapreg))
529 if (mapreg & PCIM_BAR_MEM_PREFETCH)
530 return ("Prefetchable Memory");
534 /* return log2 of map size decoded for memory or port map */
537 pci_mapsize(uint64_t testval)
541 testval = pci_mapbase(testval);
544 while ((testval & 1) == 0)
553 /* return base address of device ROM */
556 pci_rombase(uint64_t mapreg)
559 return (mapreg & PCIM_BIOS_ADDR_MASK);
562 /* return log2 of map size decided for device ROM */
565 pci_romsize(uint64_t testval)
569 testval = pci_rombase(testval);
572 while ((testval & 1) == 0)
581 /* return log2 of address range supported by map register */
584 pci_maprange(uint64_t mapreg)
588 if (PCI_BAR_IO(mapreg))
591 switch (mapreg & PCIM_BAR_MEM_TYPE) {
592 case PCIM_BAR_MEM_32:
595 case PCIM_BAR_MEM_1MB:
598 case PCIM_BAR_MEM_64:
605 /* adjust some values from PCI 1.0 devices to match 2.0 standards ... */
608 pci_fixancient(pcicfgregs *cfg)
610 if ((cfg->hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL)
613 /* PCI to PCI bridges use header type 1 */
614 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI)
615 cfg->hdrtype = PCIM_HDRTYPE_BRIDGE;
618 /* extract header type specific config data */
621 pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg)
623 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
624 switch (cfg->hdrtype & PCIM_HDRTYPE) {
625 case PCIM_HDRTYPE_NORMAL:
626 cfg->subvendor = REG(PCIR_SUBVEND_0, 2);
627 cfg->subdevice = REG(PCIR_SUBDEV_0, 2);
628 cfg->mingnt = REG(PCIR_MINGNT, 1);
629 cfg->maxlat = REG(PCIR_MAXLAT, 1);
630 cfg->nummaps = PCI_MAXMAPS_0;
632 case PCIM_HDRTYPE_BRIDGE:
633 cfg->bridge.br_seclat = REG(PCIR_SECLAT_1, 1);
634 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_1, 1);
635 cfg->bridge.br_secbus = REG(PCIR_SECBUS_1, 1);
636 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_1, 1);
637 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_1, 2);
638 cfg->nummaps = PCI_MAXMAPS_1;
640 case PCIM_HDRTYPE_CARDBUS:
641 cfg->bridge.br_seclat = REG(PCIR_SECLAT_2, 1);
642 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_2, 1);
643 cfg->bridge.br_secbus = REG(PCIR_SECBUS_2, 1);
644 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_2, 1);
645 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_2, 2);
646 cfg->subvendor = REG(PCIR_SUBVEND_2, 2);
647 cfg->subdevice = REG(PCIR_SUBDEV_2, 2);
648 cfg->nummaps = PCI_MAXMAPS_2;
654 /* read configuration header into pcicfgregs structure */
656 pci_read_device(device_t pcib, device_t bus, int d, int b, int s, int f)
658 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
661 vid = REG(PCIR_VENDOR, 2);
662 did = REG(PCIR_DEVICE, 2);
664 return (pci_fill_devinfo(pcib, bus, d, b, s, f, vid, did));
670 pci_alloc_devinfo_method(device_t dev)
673 return (malloc(sizeof(struct pci_devinfo), M_DEVBUF,
677 static struct pci_devinfo *
678 pci_fill_devinfo(device_t pcib, device_t bus, int d, int b, int s, int f,
679 uint16_t vid, uint16_t did)
681 struct pci_devinfo *devlist_entry;
684 devlist_entry = PCI_ALLOC_DEVINFO(bus);
686 cfg = &devlist_entry->cfg;
694 cfg->cmdreg = REG(PCIR_COMMAND, 2);
695 cfg->statreg = REG(PCIR_STATUS, 2);
696 cfg->baseclass = REG(PCIR_CLASS, 1);
697 cfg->subclass = REG(PCIR_SUBCLASS, 1);
698 cfg->progif = REG(PCIR_PROGIF, 1);
699 cfg->revid = REG(PCIR_REVID, 1);
700 cfg->hdrtype = REG(PCIR_HDRTYPE, 1);
701 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1);
702 cfg->lattimer = REG(PCIR_LATTIMER, 1);
703 cfg->intpin = REG(PCIR_INTPIN, 1);
704 cfg->intline = REG(PCIR_INTLINE, 1);
706 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0;
707 cfg->hdrtype &= ~PCIM_MFDEV;
708 STAILQ_INIT(&cfg->maps);
713 pci_hdrtypedata(pcib, b, s, f, cfg);
715 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT)
716 pci_read_cap(pcib, cfg);
718 STAILQ_INSERT_TAIL(&pci_devq, devlist_entry, pci_links);
720 devlist_entry->conf.pc_sel.pc_domain = cfg->domain;
721 devlist_entry->conf.pc_sel.pc_bus = cfg->bus;
722 devlist_entry->conf.pc_sel.pc_dev = cfg->slot;
723 devlist_entry->conf.pc_sel.pc_func = cfg->func;
724 devlist_entry->conf.pc_hdr = cfg->hdrtype;
726 devlist_entry->conf.pc_subvendor = cfg->subvendor;
727 devlist_entry->conf.pc_subdevice = cfg->subdevice;
728 devlist_entry->conf.pc_vendor = cfg->vendor;
729 devlist_entry->conf.pc_device = cfg->device;
731 devlist_entry->conf.pc_class = cfg->baseclass;
732 devlist_entry->conf.pc_subclass = cfg->subclass;
733 devlist_entry->conf.pc_progif = cfg->progif;
734 devlist_entry->conf.pc_revid = cfg->revid;
739 return (devlist_entry);
744 pci_ea_fill_info(device_t pcib, pcicfgregs *cfg)
746 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, \
747 cfg->ea.ea_location + (n), w)
754 uint64_t base, max_offset;
755 struct pci_ea_entry *eae;
757 if (cfg->ea.ea_location == 0)
760 STAILQ_INIT(&cfg->ea.ea_entries);
762 /* Determine the number of entries */
763 num_ent = REG(PCIR_EA_NUM_ENT, 2);
764 num_ent &= PCIM_EA_NUM_ENT_MASK;
766 /* Find the first entry to care of */
767 ptr = PCIR_EA_FIRST_ENT;
769 /* Skip DWORD 2 for type 1 functions */
770 if ((cfg->hdrtype & PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE)
773 for (a = 0; a < num_ent; a++) {
775 eae = malloc(sizeof(*eae), M_DEVBUF, M_WAITOK | M_ZERO);
776 eae->eae_cfg_offset = cfg->ea.ea_location + ptr;
778 /* Read a number of dwords in the entry */
781 ent_size = (val & PCIM_EA_ES);
783 for (b = 0; b < ent_size; b++) {
788 eae->eae_flags = val;
789 eae->eae_bei = (PCIM_EA_BEI & val) >> PCIM_EA_BEI_OFFSET;
791 base = dw[0] & PCIM_EA_FIELD_MASK;
792 max_offset = dw[1] | ~PCIM_EA_FIELD_MASK;
794 if (((dw[0] & PCIM_EA_IS_64) != 0) && (b < ent_size)) {
795 base |= (uint64_t)dw[b] << 32UL;
798 if (((dw[1] & PCIM_EA_IS_64) != 0)
800 max_offset |= (uint64_t)dw[b] << 32UL;
804 eae->eae_base = base;
805 eae->eae_max_offset = max_offset;
807 STAILQ_INSERT_TAIL(&cfg->ea.ea_entries, eae, eae_link);
810 printf("PCI(EA) dev %04x:%04x, bei %d, flags #%x, base #%jx, max_offset #%jx\n",
811 cfg->vendor, cfg->device, eae->eae_bei, eae->eae_flags,
812 (uintmax_t)eae->eae_base, (uintmax_t)eae->eae_max_offset);
819 pci_read_cap(device_t pcib, pcicfgregs *cfg)
821 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w)
822 #define WREG(n, v, w) PCIB_WRITE_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, v, w)
823 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
827 int ptr, nextptr, ptrptr;
829 switch (cfg->hdrtype & PCIM_HDRTYPE) {
830 case PCIM_HDRTYPE_NORMAL:
831 case PCIM_HDRTYPE_BRIDGE:
832 ptrptr = PCIR_CAP_PTR;
834 case PCIM_HDRTYPE_CARDBUS:
835 ptrptr = PCIR_CAP_PTR_2; /* cardbus capabilities ptr */
838 return; /* no extended capabilities support */
840 nextptr = REG(ptrptr, 1); /* sanity check? */
843 * Read capability entries.
845 while (nextptr != 0) {
848 printf("illegal PCI extended capability offset %d\n",
852 /* Find the next entry */
854 nextptr = REG(ptr + PCICAP_NEXTPTR, 1);
856 /* Process this entry */
857 switch (REG(ptr + PCICAP_ID, 1)) {
858 case PCIY_PMG: /* PCI power management */
859 if (cfg->pp.pp_cap == 0) {
860 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2);
861 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS;
862 cfg->pp.pp_bse = ptr + PCIR_POWER_BSE;
863 if ((nextptr - ptr) > PCIR_POWER_DATA)
864 cfg->pp.pp_data = ptr + PCIR_POWER_DATA;
867 case PCIY_HT: /* HyperTransport */
868 /* Determine HT-specific capability type. */
869 val = REG(ptr + PCIR_HT_COMMAND, 2);
871 if ((val & 0xe000) == PCIM_HTCAP_SLAVE)
872 cfg->ht.ht_slave = ptr;
874 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
875 switch (val & PCIM_HTCMD_CAP_MASK) {
876 case PCIM_HTCAP_MSI_MAPPING:
877 if (!(val & PCIM_HTCMD_MSI_FIXED)) {
878 /* Sanity check the mapping window. */
879 addr = REG(ptr + PCIR_HTMSI_ADDRESS_HI,
882 addr |= REG(ptr + PCIR_HTMSI_ADDRESS_LO,
884 if (addr != MSI_INTEL_ADDR_BASE)
886 "HT device at pci%d:%d:%d:%d has non-default MSI window 0x%llx\n",
887 cfg->domain, cfg->bus,
888 cfg->slot, cfg->func,
891 addr = MSI_INTEL_ADDR_BASE;
893 cfg->ht.ht_msimap = ptr;
894 cfg->ht.ht_msictrl = val;
895 cfg->ht.ht_msiaddr = addr;
900 case PCIY_MSI: /* PCI MSI */
901 cfg->msi.msi_location = ptr;
902 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2);
903 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl &
904 PCIM_MSICTRL_MMC_MASK)>>1);
906 case PCIY_MSIX: /* PCI MSI-X */
907 cfg->msix.msix_location = ptr;
908 cfg->msix.msix_ctrl = REG(ptr + PCIR_MSIX_CTRL, 2);
909 cfg->msix.msix_msgnum = (cfg->msix.msix_ctrl &
910 PCIM_MSIXCTRL_TABLE_SIZE) + 1;
911 val = REG(ptr + PCIR_MSIX_TABLE, 4);
912 cfg->msix.msix_table_bar = PCIR_BAR(val &
914 cfg->msix.msix_table_offset = val & ~PCIM_MSIX_BIR_MASK;
915 val = REG(ptr + PCIR_MSIX_PBA, 4);
916 cfg->msix.msix_pba_bar = PCIR_BAR(val &
918 cfg->msix.msix_pba_offset = val & ~PCIM_MSIX_BIR_MASK;
920 case PCIY_VPD: /* PCI Vital Product Data */
921 cfg->vpd.vpd_reg = ptr;
924 /* Should always be true. */
925 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
926 PCIM_HDRTYPE_BRIDGE) {
927 val = REG(ptr + PCIR_SUBVENDCAP_ID, 4);
928 cfg->subvendor = val & 0xffff;
929 cfg->subdevice = val >> 16;
932 case PCIY_PCIX: /* PCI-X */
934 * Assume we have a PCI-X chipset if we have
935 * at least one PCI-PCI bridge with a PCI-X
936 * capability. Note that some systems with
937 * PCI-express or HT chipsets might match on
938 * this check as well.
940 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
943 cfg->pcix.pcix_location = ptr;
945 case PCIY_EXPRESS: /* PCI-express */
947 * Assume we have a PCI-express chipset if we have
948 * at least one PCI-express device.
951 cfg->pcie.pcie_location = ptr;
952 val = REG(ptr + PCIER_FLAGS, 2);
953 cfg->pcie.pcie_type = val & PCIEM_FLAGS_TYPE;
955 case PCIY_EA: /* Enhanced Allocation */
956 cfg->ea.ea_location = ptr;
957 pci_ea_fill_info(pcib, cfg);
964 #if defined(__powerpc__)
966 * Enable the MSI mapping window for all HyperTransport
967 * slaves. PCI-PCI bridges have their windows enabled via
970 if (cfg->ht.ht_slave != 0 && cfg->ht.ht_msimap != 0 &&
971 !(cfg->ht.ht_msictrl & PCIM_HTCMD_MSI_ENABLE)) {
973 "Enabling MSI window for HyperTransport slave at pci%d:%d:%d:%d\n",
974 cfg->domain, cfg->bus, cfg->slot, cfg->func);
975 cfg->ht.ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
976 WREG(cfg->ht.ht_msimap + PCIR_HT_COMMAND, cfg->ht.ht_msictrl,
980 /* REG and WREG use carry through to next functions */
984 * PCI Vital Product Data
987 #define PCI_VPD_TIMEOUT 1000000
990 pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t *data)
992 int count = PCI_VPD_TIMEOUT;
994 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
996 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg, 2);
998 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) != 0x8000) {
1001 DELAY(1); /* limit looping */
1003 *data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4));
1010 pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t data)
1012 int count = PCI_VPD_TIMEOUT;
1014 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
1016 WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4);
1017 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg | 0x8000, 2);
1018 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) == 0x8000) {
1021 DELAY(1); /* limit looping */
1028 #undef PCI_VPD_TIMEOUT
1030 struct vpd_readstate {
1040 vpd_nextbyte(struct vpd_readstate *vrs, uint8_t *data)
1045 if (vrs->bytesinval == 0) {
1046 if (pci_read_vpd_reg(vrs->pcib, vrs->cfg, vrs->off, ®))
1048 vrs->val = le32toh(reg);
1050 byte = vrs->val & 0xff;
1051 vrs->bytesinval = 3;
1053 vrs->val = vrs->val >> 8;
1054 byte = vrs->val & 0xff;
1064 pci_read_vpd(device_t pcib, pcicfgregs *cfg)
1066 struct vpd_readstate vrs;
1071 int alloc, off; /* alloc/off for RO/W arrays */
1077 /* init vpd reader */
1085 name = remain = i = 0; /* shut up stupid gcc */
1086 alloc = off = 0; /* shut up stupid gcc */
1087 dflen = 0; /* shut up stupid gcc */
1089 while (state >= 0) {
1090 if (vpd_nextbyte(&vrs, &byte)) {
1095 printf("vpd: val: %#x, off: %d, bytesinval: %d, byte: %#hhx, " \
1096 "state: %d, remain: %d, name: %#x, i: %d\n", vrs.val,
1097 vrs.off, vrs.bytesinval, byte, state, remain, name, i);
1100 case 0: /* item name */
1102 if (vpd_nextbyte(&vrs, &byte2)) {
1107 if (vpd_nextbyte(&vrs, &byte2)) {
1111 remain |= byte2 << 8;
1114 remain = byte & 0x7;
1115 name = (byte >> 3) & 0xf;
1117 if (vrs.off + remain - vrs.bytesinval > 0x8000) {
1119 "VPD data overflow, remain %#x\n", remain);
1124 case 0x2: /* String */
1125 cfg->vpd.vpd_ident = malloc(remain + 1,
1126 M_DEVBUF, M_WAITOK);
1133 case 0x10: /* VPD-R */
1136 cfg->vpd.vpd_ros = malloc(alloc *
1137 sizeof(*cfg->vpd.vpd_ros), M_DEVBUF,
1141 case 0x11: /* VPD-W */
1144 cfg->vpd.vpd_w = malloc(alloc *
1145 sizeof(*cfg->vpd.vpd_w), M_DEVBUF,
1149 default: /* Invalid data, abort */
1155 case 1: /* Identifier String */
1156 cfg->vpd.vpd_ident[i++] = byte;
1159 cfg->vpd.vpd_ident[i] = '\0';
1164 case 2: /* VPD-R Keyword Header */
1166 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1167 (alloc *= 2) * sizeof(*cfg->vpd.vpd_ros),
1168 M_DEVBUF, M_WAITOK | M_ZERO);
1170 cfg->vpd.vpd_ros[off].keyword[0] = byte;
1171 if (vpd_nextbyte(&vrs, &byte2)) {
1175 cfg->vpd.vpd_ros[off].keyword[1] = byte2;
1176 if (vpd_nextbyte(&vrs, &byte2)) {
1180 cfg->vpd.vpd_ros[off].len = dflen = byte2;
1182 strncmp(cfg->vpd.vpd_ros[off].keyword, "RV",
1185 * if this happens, we can't trust the rest
1188 pci_printf(cfg, "bad keyword length: %d\n",
1193 } else if (dflen == 0) {
1194 cfg->vpd.vpd_ros[off].value = malloc(1 *
1195 sizeof(*cfg->vpd.vpd_ros[off].value),
1196 M_DEVBUF, M_WAITOK);
1197 cfg->vpd.vpd_ros[off].value[0] = '\x00';
1199 cfg->vpd.vpd_ros[off].value = malloc(
1201 sizeof(*cfg->vpd.vpd_ros[off].value),
1202 M_DEVBUF, M_WAITOK);
1205 /* keep in sync w/ state 3's transistions */
1206 if (dflen == 0 && remain == 0)
1208 else if (dflen == 0)
1214 case 3: /* VPD-R Keyword Value */
1215 cfg->vpd.vpd_ros[off].value[i++] = byte;
1216 if (strncmp(cfg->vpd.vpd_ros[off].keyword,
1217 "RV", 2) == 0 && cksumvalid == -1) {
1223 "bad VPD cksum, remain %hhu\n",
1232 /* keep in sync w/ state 2's transistions */
1234 cfg->vpd.vpd_ros[off++].value[i++] = '\0';
1235 if (dflen == 0 && remain == 0) {
1236 cfg->vpd.vpd_rocnt = off;
1237 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1238 off * sizeof(*cfg->vpd.vpd_ros),
1239 M_DEVBUF, M_WAITOK | M_ZERO);
1241 } else if (dflen == 0)
1251 case 5: /* VPD-W Keyword Header */
1253 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1254 (alloc *= 2) * sizeof(*cfg->vpd.vpd_w),
1255 M_DEVBUF, M_WAITOK | M_ZERO);
1257 cfg->vpd.vpd_w[off].keyword[0] = byte;
1258 if (vpd_nextbyte(&vrs, &byte2)) {
1262 cfg->vpd.vpd_w[off].keyword[1] = byte2;
1263 if (vpd_nextbyte(&vrs, &byte2)) {
1267 cfg->vpd.vpd_w[off].len = dflen = byte2;
1268 cfg->vpd.vpd_w[off].start = vrs.off - vrs.bytesinval;
1269 cfg->vpd.vpd_w[off].value = malloc((dflen + 1) *
1270 sizeof(*cfg->vpd.vpd_w[off].value),
1271 M_DEVBUF, M_WAITOK);
1274 /* keep in sync w/ state 6's transistions */
1275 if (dflen == 0 && remain == 0)
1277 else if (dflen == 0)
1283 case 6: /* VPD-W Keyword Value */
1284 cfg->vpd.vpd_w[off].value[i++] = byte;
1287 /* keep in sync w/ state 5's transistions */
1289 cfg->vpd.vpd_w[off++].value[i++] = '\0';
1290 if (dflen == 0 && remain == 0) {
1291 cfg->vpd.vpd_wcnt = off;
1292 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1293 off * sizeof(*cfg->vpd.vpd_w),
1294 M_DEVBUF, M_WAITOK | M_ZERO);
1296 } else if (dflen == 0)
1301 pci_printf(cfg, "invalid state: %d\n", state);
1307 if (cksumvalid == 0 || state < -1) {
1308 /* read-only data bad, clean up */
1309 if (cfg->vpd.vpd_ros != NULL) {
1310 for (off = 0; cfg->vpd.vpd_ros[off].value; off++)
1311 free(cfg->vpd.vpd_ros[off].value, M_DEVBUF);
1312 free(cfg->vpd.vpd_ros, M_DEVBUF);
1313 cfg->vpd.vpd_ros = NULL;
1317 /* I/O error, clean up */
1318 pci_printf(cfg, "failed to read VPD data.\n");
1319 if (cfg->vpd.vpd_ident != NULL) {
1320 free(cfg->vpd.vpd_ident, M_DEVBUF);
1321 cfg->vpd.vpd_ident = NULL;
1323 if (cfg->vpd.vpd_w != NULL) {
1324 for (off = 0; cfg->vpd.vpd_w[off].value; off++)
1325 free(cfg->vpd.vpd_w[off].value, M_DEVBUF);
1326 free(cfg->vpd.vpd_w, M_DEVBUF);
1327 cfg->vpd.vpd_w = NULL;
1330 cfg->vpd.vpd_cached = 1;
1336 pci_get_vpd_ident_method(device_t dev, device_t child, const char **identptr)
1338 struct pci_devinfo *dinfo = device_get_ivars(child);
1339 pcicfgregs *cfg = &dinfo->cfg;
1341 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1342 pci_read_vpd(device_get_parent(dev), cfg);
1344 *identptr = cfg->vpd.vpd_ident;
1346 if (*identptr == NULL)
1353 pci_get_vpd_readonly_method(device_t dev, device_t child, const char *kw,
1356 struct pci_devinfo *dinfo = device_get_ivars(child);
1357 pcicfgregs *cfg = &dinfo->cfg;
1360 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1361 pci_read_vpd(device_get_parent(dev), cfg);
1363 for (i = 0; i < cfg->vpd.vpd_rocnt; i++)
1364 if (memcmp(kw, cfg->vpd.vpd_ros[i].keyword,
1365 sizeof(cfg->vpd.vpd_ros[i].keyword)) == 0) {
1366 *vptr = cfg->vpd.vpd_ros[i].value;
1375 pci_fetch_vpd_list(device_t dev)
1377 struct pci_devinfo *dinfo = device_get_ivars(dev);
1378 pcicfgregs *cfg = &dinfo->cfg;
1380 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1381 pci_read_vpd(device_get_parent(device_get_parent(dev)), cfg);
1386 * Find the requested HyperTransport capability and return the offset
1387 * in configuration space via the pointer provided. The function
1388 * returns 0 on success and an error code otherwise.
1391 pci_find_htcap_method(device_t dev, device_t child, int capability, int *capreg)
1396 error = pci_find_cap(child, PCIY_HT, &ptr);
1401 * Traverse the capabilities list checking each HT capability
1402 * to see if it matches the requested HT capability.
1405 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1406 if (capability == PCIM_HTCAP_SLAVE ||
1407 capability == PCIM_HTCAP_HOST)
1410 val &= PCIM_HTCMD_CAP_MASK;
1411 if (val == capability) {
1417 /* Skip to the next HT capability. */
1418 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1426 * Find the next requested HyperTransport capability after start and return
1427 * the offset in configuration space via the pointer provided. The function
1428 * returns 0 on success and an error code otherwise.
1431 pci_find_next_htcap_method(device_t dev, device_t child, int capability,
1432 int start, int *capreg)
1437 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == PCIY_HT,
1438 ("start capability is not HyperTransport capability"));
1442 * Traverse the capabilities list checking each HT capability
1443 * to see if it matches the requested HT capability.
1446 /* Skip to the next HT capability. */
1447 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1450 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1451 if (capability == PCIM_HTCAP_SLAVE ||
1452 capability == PCIM_HTCAP_HOST)
1455 val &= PCIM_HTCMD_CAP_MASK;
1456 if (val == capability) {
1467 * Find the requested capability and return the offset in
1468 * configuration space via the pointer provided. The function returns
1469 * 0 on success and an error code otherwise.
1472 pci_find_cap_method(device_t dev, device_t child, int capability,
1475 struct pci_devinfo *dinfo = device_get_ivars(child);
1476 pcicfgregs *cfg = &dinfo->cfg;
1481 * Check the CAP_LIST bit of the PCI status register first.
1483 status = pci_read_config(child, PCIR_STATUS, 2);
1484 if (!(status & PCIM_STATUS_CAPPRESENT))
1488 * Determine the start pointer of the capabilities list.
1490 switch (cfg->hdrtype & PCIM_HDRTYPE) {
1491 case PCIM_HDRTYPE_NORMAL:
1492 case PCIM_HDRTYPE_BRIDGE:
1495 case PCIM_HDRTYPE_CARDBUS:
1496 ptr = PCIR_CAP_PTR_2;
1500 return (ENXIO); /* no extended capabilities support */
1502 ptr = pci_read_config(child, ptr, 1);
1505 * Traverse the capabilities list.
1508 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1513 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1520 * Find the next requested capability after start and return the offset in
1521 * configuration space via the pointer provided. The function returns
1522 * 0 on success and an error code otherwise.
1525 pci_find_next_cap_method(device_t dev, device_t child, int capability,
1526 int start, int *capreg)
1530 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == capability,
1531 ("start capability is not expected capability"));
1533 ptr = pci_read_config(child, start + PCICAP_NEXTPTR, 1);
1535 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1540 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1547 * Find the requested extended capability and return the offset in
1548 * configuration space via the pointer provided. The function returns
1549 * 0 on success and an error code otherwise.
1552 pci_find_extcap_method(device_t dev, device_t child, int capability,
1555 struct pci_devinfo *dinfo = device_get_ivars(child);
1556 pcicfgregs *cfg = &dinfo->cfg;
1560 /* Only supported for PCI-express devices. */
1561 if (cfg->pcie.pcie_location == 0)
1565 ecap = pci_read_config(child, ptr, 4);
1566 if (ecap == 0xffffffff || ecap == 0)
1569 if (PCI_EXTCAP_ID(ecap) == capability) {
1574 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1577 ecap = pci_read_config(child, ptr, 4);
1584 * Find the next requested extended capability after start and return the
1585 * offset in configuration space via the pointer provided. The function
1586 * returns 0 on success and an error code otherwise.
1589 pci_find_next_extcap_method(device_t dev, device_t child, int capability,
1590 int start, int *capreg)
1592 struct pci_devinfo *dinfo = device_get_ivars(child);
1593 pcicfgregs *cfg = &dinfo->cfg;
1597 /* Only supported for PCI-express devices. */
1598 if (cfg->pcie.pcie_location == 0)
1601 ecap = pci_read_config(child, start, 4);
1602 KASSERT(PCI_EXTCAP_ID(ecap) == capability,
1603 ("start extended capability is not expected capability"));
1604 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1606 ecap = pci_read_config(child, ptr, 4);
1607 if (PCI_EXTCAP_ID(ecap) == capability) {
1612 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1619 * Support for MSI-X message interrupts.
1622 pci_write_msix_entry(device_t dev, u_int index, uint64_t address, uint32_t data)
1624 struct pci_devinfo *dinfo = device_get_ivars(dev);
1625 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1628 KASSERT(msix->msix_table_len > index, ("bogus index"));
1629 offset = msix->msix_table_offset + index * 16;
1630 bus_write_4(msix->msix_table_res, offset, address & 0xffffffff);
1631 bus_write_4(msix->msix_table_res, offset + 4, address >> 32);
1632 bus_write_4(msix->msix_table_res, offset + 8, data);
1636 pci_enable_msix_method(device_t dev, device_t child, u_int index,
1637 uint64_t address, uint32_t data)
1640 if (pci_msix_rewrite_table) {
1641 struct pci_devinfo *dinfo = device_get_ivars(child);
1642 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1645 * Some VM hosts require MSIX to be disabled in the
1646 * control register before updating the MSIX table
1647 * entries are allowed. It is not enough to only
1648 * disable MSIX while updating a single entry. MSIX
1649 * must be disabled while updating all entries in the
1652 pci_write_config(child,
1653 msix->msix_location + PCIR_MSIX_CTRL,
1654 msix->msix_ctrl & ~PCIM_MSIXCTRL_MSIX_ENABLE, 2);
1655 pci_resume_msix(child);
1657 pci_write_msix_entry(child, index, address, data);
1659 /* Enable MSI -> HT mapping. */
1660 pci_ht_map_msi(child, address);
1664 pci_mask_msix(device_t dev, u_int index)
1666 struct pci_devinfo *dinfo = device_get_ivars(dev);
1667 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1668 uint32_t offset, val;
1670 KASSERT(msix->msix_msgnum > index, ("bogus index"));
1671 offset = msix->msix_table_offset + index * 16 + 12;
1672 val = bus_read_4(msix->msix_table_res, offset);
1673 val |= PCIM_MSIX_VCTRL_MASK;
1676 * Some devices (e.g. Samsung PM961) do not support reads of this
1677 * register, so always write the new value.
1679 bus_write_4(msix->msix_table_res, offset, val);
1683 pci_unmask_msix(device_t dev, u_int index)
1685 struct pci_devinfo *dinfo = device_get_ivars(dev);
1686 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1687 uint32_t offset, val;
1689 KASSERT(msix->msix_table_len > index, ("bogus index"));
1690 offset = msix->msix_table_offset + index * 16 + 12;
1691 val = bus_read_4(msix->msix_table_res, offset);
1692 val &= ~PCIM_MSIX_VCTRL_MASK;
1695 * Some devices (e.g. Samsung PM961) do not support reads of this
1696 * register, so always write the new value.
1698 bus_write_4(msix->msix_table_res, offset, val);
1702 pci_pending_msix(device_t dev, u_int index)
1704 struct pci_devinfo *dinfo = device_get_ivars(dev);
1705 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1706 uint32_t offset, bit;
1708 KASSERT(msix->msix_table_len > index, ("bogus index"));
1709 offset = msix->msix_pba_offset + (index / 32) * 4;
1710 bit = 1 << index % 32;
1711 return (bus_read_4(msix->msix_pba_res, offset) & bit);
1715 * Restore MSI-X registers and table during resume. If MSI-X is
1716 * enabled then walk the virtual table to restore the actual MSI-X
1720 pci_resume_msix(device_t dev)
1722 struct pci_devinfo *dinfo = device_get_ivars(dev);
1723 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1724 struct msix_table_entry *mte;
1725 struct msix_vector *mv;
1728 if (msix->msix_alloc > 0) {
1729 /* First, mask all vectors. */
1730 for (i = 0; i < msix->msix_msgnum; i++)
1731 pci_mask_msix(dev, i);
1733 /* Second, program any messages with at least one handler. */
1734 for (i = 0; i < msix->msix_table_len; i++) {
1735 mte = &msix->msix_table[i];
1736 if (mte->mte_vector == 0 || mte->mte_handlers == 0)
1738 mv = &msix->msix_vectors[mte->mte_vector - 1];
1739 pci_write_msix_entry(dev, i, mv->mv_address,
1741 pci_unmask_msix(dev, i);
1744 pci_write_config(dev, msix->msix_location + PCIR_MSIX_CTRL,
1745 msix->msix_ctrl, 2);
1749 * Attempt to allocate *count MSI-X messages. The actual number allocated is
1750 * returned in *count. After this function returns, each message will be
1751 * available to the driver as SYS_RES_IRQ resources starting at rid 1.
1754 pci_alloc_msix_method(device_t dev, device_t child, int *count)
1756 struct pci_devinfo *dinfo = device_get_ivars(child);
1757 pcicfgregs *cfg = &dinfo->cfg;
1758 struct resource_list_entry *rle;
1759 int actual, error, i, irq, max;
1761 /* Don't let count == 0 get us into trouble. */
1765 /* If rid 0 is allocated, then fail. */
1766 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
1767 if (rle != NULL && rle->res != NULL)
1770 /* Already have allocated messages? */
1771 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
1774 /* If MSI-X is blacklisted for this system, fail. */
1775 if (pci_msix_blacklisted())
1778 /* MSI-X capability present? */
1779 if (cfg->msix.msix_location == 0 || !pci_do_msix)
1782 /* Make sure the appropriate BARs are mapped. */
1783 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1784 cfg->msix.msix_table_bar);
1785 if (rle == NULL || rle->res == NULL ||
1786 !(rman_get_flags(rle->res) & RF_ACTIVE))
1788 cfg->msix.msix_table_res = rle->res;
1789 if (cfg->msix.msix_pba_bar != cfg->msix.msix_table_bar) {
1790 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1791 cfg->msix.msix_pba_bar);
1792 if (rle == NULL || rle->res == NULL ||
1793 !(rman_get_flags(rle->res) & RF_ACTIVE))
1796 cfg->msix.msix_pba_res = rle->res;
1799 device_printf(child,
1800 "attempting to allocate %d MSI-X vectors (%d supported)\n",
1801 *count, cfg->msix.msix_msgnum);
1802 max = min(*count, cfg->msix.msix_msgnum);
1803 for (i = 0; i < max; i++) {
1804 /* Allocate a message. */
1805 error = PCIB_ALLOC_MSIX(device_get_parent(dev), child, &irq);
1811 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
1817 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1);
1819 device_printf(child, "using IRQ %ju for MSI-X\n",
1825 * Be fancy and try to print contiguous runs of
1826 * IRQ values as ranges. 'irq' is the previous IRQ.
1827 * 'run' is true if we are in a range.
1829 device_printf(child, "using IRQs %ju", rle->start);
1832 for (i = 1; i < actual; i++) {
1833 rle = resource_list_find(&dinfo->resources,
1834 SYS_RES_IRQ, i + 1);
1836 /* Still in a run? */
1837 if (rle->start == irq + 1) {
1843 /* Finish previous range. */
1849 /* Start new range. */
1850 printf(",%ju", rle->start);
1854 /* Unfinished range? */
1857 printf(" for MSI-X\n");
1861 /* Mask all vectors. */
1862 for (i = 0; i < cfg->msix.msix_msgnum; i++)
1863 pci_mask_msix(child, i);
1865 /* Allocate and initialize vector data and virtual table. */
1866 cfg->msix.msix_vectors = malloc(sizeof(struct msix_vector) * actual,
1867 M_DEVBUF, M_WAITOK | M_ZERO);
1868 cfg->msix.msix_table = malloc(sizeof(struct msix_table_entry) * actual,
1869 M_DEVBUF, M_WAITOK | M_ZERO);
1870 for (i = 0; i < actual; i++) {
1871 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1872 cfg->msix.msix_vectors[i].mv_irq = rle->start;
1873 cfg->msix.msix_table[i].mte_vector = i + 1;
1876 /* Update control register to enable MSI-X. */
1877 cfg->msix.msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE;
1878 pci_write_config(child, cfg->msix.msix_location + PCIR_MSIX_CTRL,
1879 cfg->msix.msix_ctrl, 2);
1881 /* Update counts of alloc'd messages. */
1882 cfg->msix.msix_alloc = actual;
1883 cfg->msix.msix_table_len = actual;
1889 * By default, pci_alloc_msix() will assign the allocated IRQ
1890 * resources consecutively to the first N messages in the MSI-X table.
1891 * However, device drivers may want to use different layouts if they
1892 * either receive fewer messages than they asked for, or they wish to
1893 * populate the MSI-X table sparsely. This method allows the driver
1894 * to specify what layout it wants. It must be called after a
1895 * successful pci_alloc_msix() but before any of the associated
1896 * SYS_RES_IRQ resources are allocated via bus_alloc_resource().
1898 * The 'vectors' array contains 'count' message vectors. The array
1899 * maps directly to the MSI-X table in that index 0 in the array
1900 * specifies the vector for the first message in the MSI-X table, etc.
1901 * The vector value in each array index can either be 0 to indicate
1902 * that no vector should be assigned to a message slot, or it can be a
1903 * number from 1 to N (where N is the count returned from a
1904 * succcessful call to pci_alloc_msix()) to indicate which message
1905 * vector (IRQ) to be used for the corresponding message.
1907 * On successful return, each message with a non-zero vector will have
1908 * an associated SYS_RES_IRQ whose rid is equal to the array index +
1909 * 1. Additionally, if any of the IRQs allocated via the previous
1910 * call to pci_alloc_msix() are not used in the mapping, those IRQs
1911 * will be freed back to the system automatically.
1913 * For example, suppose a driver has a MSI-X table with 6 messages and
1914 * asks for 6 messages, but pci_alloc_msix() only returns a count of
1915 * 3. Call the three vectors allocated by pci_alloc_msix() A, B, and
1916 * C. After the call to pci_alloc_msix(), the device will be setup to
1917 * have an MSI-X table of ABC--- (where - means no vector assigned).
1918 * If the driver then passes a vector array of { 1, 0, 1, 2, 0, 2 },
1919 * then the MSI-X table will look like A-AB-B, and the 'C' vector will
1920 * be freed back to the system. This device will also have valid
1921 * SYS_RES_IRQ rids of 1, 3, 4, and 6.
1923 * In any case, the SYS_RES_IRQ rid X will always map to the message
1924 * at MSI-X table index X - 1 and will only be valid if a vector is
1925 * assigned to that table entry.
1928 pci_remap_msix_method(device_t dev, device_t child, int count,
1929 const u_int *vectors)
1931 struct pci_devinfo *dinfo = device_get_ivars(child);
1932 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1933 struct resource_list_entry *rle;
1934 int i, irq, j, *used;
1937 * Have to have at least one message in the table but the
1938 * table can't be bigger than the actual MSI-X table in the
1941 if (count == 0 || count > msix->msix_msgnum)
1944 /* Sanity check the vectors. */
1945 for (i = 0; i < count; i++)
1946 if (vectors[i] > msix->msix_alloc)
1950 * Make sure there aren't any holes in the vectors to be used.
1951 * It's a big pain to support it, and it doesn't really make
1952 * sense anyway. Also, at least one vector must be used.
1954 used = malloc(sizeof(int) * msix->msix_alloc, M_DEVBUF, M_WAITOK |
1956 for (i = 0; i < count; i++)
1957 if (vectors[i] != 0)
1958 used[vectors[i] - 1] = 1;
1959 for (i = 0; i < msix->msix_alloc - 1; i++)
1960 if (used[i] == 0 && used[i + 1] == 1) {
1961 free(used, M_DEVBUF);
1965 free(used, M_DEVBUF);
1969 /* Make sure none of the resources are allocated. */
1970 for (i = 0; i < msix->msix_table_len; i++) {
1971 if (msix->msix_table[i].mte_vector == 0)
1973 if (msix->msix_table[i].mte_handlers > 0) {
1974 free(used, M_DEVBUF);
1977 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1978 KASSERT(rle != NULL, ("missing resource"));
1979 if (rle->res != NULL) {
1980 free(used, M_DEVBUF);
1985 /* Free the existing resource list entries. */
1986 for (i = 0; i < msix->msix_table_len; i++) {
1987 if (msix->msix_table[i].mte_vector == 0)
1989 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
1993 * Build the new virtual table keeping track of which vectors are
1996 free(msix->msix_table, M_DEVBUF);
1997 msix->msix_table = malloc(sizeof(struct msix_table_entry) * count,
1998 M_DEVBUF, M_WAITOK | M_ZERO);
1999 for (i = 0; i < count; i++)
2000 msix->msix_table[i].mte_vector = vectors[i];
2001 msix->msix_table_len = count;
2003 /* Free any unused IRQs and resize the vectors array if necessary. */
2004 j = msix->msix_alloc - 1;
2006 struct msix_vector *vec;
2008 while (used[j] == 0) {
2009 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2010 msix->msix_vectors[j].mv_irq);
2013 vec = malloc(sizeof(struct msix_vector) * (j + 1), M_DEVBUF,
2015 bcopy(msix->msix_vectors, vec, sizeof(struct msix_vector) *
2017 free(msix->msix_vectors, M_DEVBUF);
2018 msix->msix_vectors = vec;
2019 msix->msix_alloc = j + 1;
2021 free(used, M_DEVBUF);
2023 /* Map the IRQs onto the rids. */
2024 for (i = 0; i < count; i++) {
2025 if (vectors[i] == 0)
2027 irq = msix->msix_vectors[vectors[i] - 1].mv_irq;
2028 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
2033 device_printf(child, "Remapped MSI-X IRQs as: ");
2034 for (i = 0; i < count; i++) {
2037 if (vectors[i] == 0)
2041 msix->msix_vectors[vectors[i] - 1].mv_irq);
2050 pci_release_msix(device_t dev, device_t child)
2052 struct pci_devinfo *dinfo = device_get_ivars(child);
2053 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2054 struct resource_list_entry *rle;
2057 /* Do we have any messages to release? */
2058 if (msix->msix_alloc == 0)
2061 /* Make sure none of the resources are allocated. */
2062 for (i = 0; i < msix->msix_table_len; i++) {
2063 if (msix->msix_table[i].mte_vector == 0)
2065 if (msix->msix_table[i].mte_handlers > 0)
2067 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2068 KASSERT(rle != NULL, ("missing resource"));
2069 if (rle->res != NULL)
2073 /* Update control register to disable MSI-X. */
2074 msix->msix_ctrl &= ~PCIM_MSIXCTRL_MSIX_ENABLE;
2075 pci_write_config(child, msix->msix_location + PCIR_MSIX_CTRL,
2076 msix->msix_ctrl, 2);
2078 /* Free the resource list entries. */
2079 for (i = 0; i < msix->msix_table_len; i++) {
2080 if (msix->msix_table[i].mte_vector == 0)
2082 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2084 free(msix->msix_table, M_DEVBUF);
2085 msix->msix_table_len = 0;
2087 /* Release the IRQs. */
2088 for (i = 0; i < msix->msix_alloc; i++)
2089 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2090 msix->msix_vectors[i].mv_irq);
2091 free(msix->msix_vectors, M_DEVBUF);
2092 msix->msix_alloc = 0;
2097 * Return the max supported MSI-X messages this device supports.
2098 * Basically, assuming the MD code can alloc messages, this function
2099 * should return the maximum value that pci_alloc_msix() can return.
2100 * Thus, it is subject to the tunables, etc.
2103 pci_msix_count_method(device_t dev, device_t child)
2105 struct pci_devinfo *dinfo = device_get_ivars(child);
2106 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2108 if (pci_do_msix && msix->msix_location != 0)
2109 return (msix->msix_msgnum);
2114 pci_msix_pba_bar_method(device_t dev, device_t child)
2116 struct pci_devinfo *dinfo = device_get_ivars(child);
2117 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2119 if (pci_do_msix && msix->msix_location != 0)
2120 return (msix->msix_pba_bar);
2125 pci_msix_table_bar_method(device_t dev, device_t child)
2127 struct pci_devinfo *dinfo = device_get_ivars(child);
2128 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2130 if (pci_do_msix && msix->msix_location != 0)
2131 return (msix->msix_table_bar);
2136 * HyperTransport MSI mapping control
2139 pci_ht_map_msi(device_t dev, uint64_t addr)
2141 struct pci_devinfo *dinfo = device_get_ivars(dev);
2142 struct pcicfg_ht *ht = &dinfo->cfg.ht;
2147 if (addr && !(ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) &&
2148 ht->ht_msiaddr >> 20 == addr >> 20) {
2149 /* Enable MSI -> HT mapping. */
2150 ht->ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
2151 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2155 if (!addr && ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) {
2156 /* Disable MSI -> HT mapping. */
2157 ht->ht_msictrl &= ~PCIM_HTCMD_MSI_ENABLE;
2158 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2164 pci_get_max_payload(device_t dev)
2166 struct pci_devinfo *dinfo = device_get_ivars(dev);
2170 cap = dinfo->cfg.pcie.pcie_location;
2173 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2174 val &= PCIEM_CTL_MAX_PAYLOAD;
2176 return (1 << (val + 7));
2180 pci_get_max_read_req(device_t dev)
2182 struct pci_devinfo *dinfo = device_get_ivars(dev);
2186 cap = dinfo->cfg.pcie.pcie_location;
2189 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2190 val &= PCIEM_CTL_MAX_READ_REQUEST;
2192 return (1 << (val + 7));
2196 pci_set_max_read_req(device_t dev, int size)
2198 struct pci_devinfo *dinfo = device_get_ivars(dev);
2202 cap = dinfo->cfg.pcie.pcie_location;
2209 size = (1 << (fls(size) - 1));
2210 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2211 val &= ~PCIEM_CTL_MAX_READ_REQUEST;
2212 val |= (fls(size) - 8) << 12;
2213 pci_write_config(dev, cap + PCIER_DEVICE_CTL, val, 2);
2218 pcie_read_config(device_t dev, int reg, int width)
2220 struct pci_devinfo *dinfo = device_get_ivars(dev);
2223 cap = dinfo->cfg.pcie.pcie_location;
2227 return (0xffffffff);
2230 return (pci_read_config(dev, cap + reg, width));
2234 pcie_write_config(device_t dev, int reg, uint32_t value, int width)
2236 struct pci_devinfo *dinfo = device_get_ivars(dev);
2239 cap = dinfo->cfg.pcie.pcie_location;
2242 pci_write_config(dev, cap + reg, value, width);
2246 * Adjusts a PCI-e capability register by clearing the bits in mask
2247 * and setting the bits in (value & mask). Bits not set in mask are
2250 * Returns the old value on success or all ones on failure.
2253 pcie_adjust_config(device_t dev, int reg, uint32_t mask, uint32_t value,
2256 struct pci_devinfo *dinfo = device_get_ivars(dev);
2260 cap = dinfo->cfg.pcie.pcie_location;
2264 return (0xffffffff);
2267 old = pci_read_config(dev, cap + reg, width);
2269 new |= (value & mask);
2270 pci_write_config(dev, cap + reg, new, width);
2275 * Support for MSI message signalled interrupts.
2278 pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
2281 struct pci_devinfo *dinfo = device_get_ivars(child);
2282 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2284 /* Write data and address values. */
2285 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR,
2286 address & 0xffffffff, 4);
2287 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2288 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR_HIGH,
2290 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA_64BIT,
2293 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA, data,
2296 /* Enable MSI in the control register. */
2297 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
2298 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2301 /* Enable MSI -> HT mapping. */
2302 pci_ht_map_msi(child, address);
2306 pci_disable_msi_method(device_t dev, device_t child)
2308 struct pci_devinfo *dinfo = device_get_ivars(child);
2309 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2311 /* Disable MSI -> HT mapping. */
2312 pci_ht_map_msi(child, 0);
2314 /* Disable MSI in the control register. */
2315 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
2316 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2321 * Restore MSI registers during resume. If MSI is enabled then
2322 * restore the data and address registers in addition to the control
2326 pci_resume_msi(device_t dev)
2328 struct pci_devinfo *dinfo = device_get_ivars(dev);
2329 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2333 if (msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE) {
2334 address = msi->msi_addr;
2335 data = msi->msi_data;
2336 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR,
2337 address & 0xffffffff, 4);
2338 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2339 pci_write_config(dev, msi->msi_location +
2340 PCIR_MSI_ADDR_HIGH, address >> 32, 4);
2341 pci_write_config(dev, msi->msi_location +
2342 PCIR_MSI_DATA_64BIT, data, 2);
2344 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA,
2347 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl,
2352 pci_remap_intr_method(device_t bus, device_t dev, u_int irq)
2354 struct pci_devinfo *dinfo = device_get_ivars(dev);
2355 pcicfgregs *cfg = &dinfo->cfg;
2356 struct resource_list_entry *rle;
2357 struct msix_table_entry *mte;
2358 struct msix_vector *mv;
2364 * Handle MSI first. We try to find this IRQ among our list
2365 * of MSI IRQs. If we find it, we request updated address and
2366 * data registers and apply the results.
2368 if (cfg->msi.msi_alloc > 0) {
2370 /* If we don't have any active handlers, nothing to do. */
2371 if (cfg->msi.msi_handlers == 0)
2373 for (i = 0; i < cfg->msi.msi_alloc; i++) {
2374 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ,
2376 if (rle->start == irq) {
2377 error = PCIB_MAP_MSI(device_get_parent(bus),
2378 dev, irq, &addr, &data);
2381 pci_disable_msi(dev);
2382 dinfo->cfg.msi.msi_addr = addr;
2383 dinfo->cfg.msi.msi_data = data;
2384 pci_enable_msi(dev, addr, data);
2392 * For MSI-X, we check to see if we have this IRQ. If we do,
2393 * we request the updated mapping info. If that works, we go
2394 * through all the slots that use this IRQ and update them.
2396 if (cfg->msix.msix_alloc > 0) {
2397 for (i = 0; i < cfg->msix.msix_alloc; i++) {
2398 mv = &cfg->msix.msix_vectors[i];
2399 if (mv->mv_irq == irq) {
2400 error = PCIB_MAP_MSI(device_get_parent(bus),
2401 dev, irq, &addr, &data);
2404 mv->mv_address = addr;
2406 for (j = 0; j < cfg->msix.msix_table_len; j++) {
2407 mte = &cfg->msix.msix_table[j];
2408 if (mte->mte_vector != i + 1)
2410 if (mte->mte_handlers == 0)
2412 pci_mask_msix(dev, j);
2413 pci_enable_msix(dev, j, addr, data);
2414 pci_unmask_msix(dev, j);
2425 * Returns true if the specified device is blacklisted because MSI
2429 pci_msi_device_blacklisted(device_t dev)
2432 if (!pci_honor_msi_blacklist)
2435 return (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSI));
2439 * Determine if MSI is blacklisted globally on this system. Currently,
2440 * we just check for blacklisted chipsets as represented by the
2441 * host-PCI bridge at device 0:0:0. In the future, it may become
2442 * necessary to check other system attributes, such as the kenv values
2443 * that give the motherboard manufacturer and model number.
2446 pci_msi_blacklisted(void)
2450 if (!pci_honor_msi_blacklist)
2453 /* Blacklist all non-PCI-express and non-PCI-X chipsets. */
2454 if (!(pcie_chipset || pcix_chipset)) {
2455 if (vm_guest != VM_GUEST_NO) {
2457 * Whitelist older chipsets in virtual
2458 * machines known to support MSI.
2460 dev = pci_find_bsf(0, 0, 0);
2462 return (!pci_has_quirk(pci_get_devid(dev),
2463 PCI_QUIRK_ENABLE_MSI_VM));
2468 dev = pci_find_bsf(0, 0, 0);
2470 return (pci_msi_device_blacklisted(dev));
2475 * Returns true if the specified device is blacklisted because MSI-X
2476 * doesn't work. Note that this assumes that if MSI doesn't work,
2477 * MSI-X doesn't either.
2480 pci_msix_device_blacklisted(device_t dev)
2483 if (!pci_honor_msi_blacklist)
2486 if (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSIX))
2489 return (pci_msi_device_blacklisted(dev));
2493 * Determine if MSI-X is blacklisted globally on this system. If MSI
2494 * is blacklisted, assume that MSI-X is as well. Check for additional
2495 * chipsets where MSI works but MSI-X does not.
2498 pci_msix_blacklisted(void)
2502 if (!pci_honor_msi_blacklist)
2505 dev = pci_find_bsf(0, 0, 0);
2506 if (dev != NULL && pci_has_quirk(pci_get_devid(dev),
2507 PCI_QUIRK_DISABLE_MSIX))
2510 return (pci_msi_blacklisted());
2514 * Attempt to allocate *count MSI messages. The actual number allocated is
2515 * returned in *count. After this function returns, each message will be
2516 * available to the driver as SYS_RES_IRQ resources starting at a rid 1.
2519 pci_alloc_msi_method(device_t dev, device_t child, int *count)
2521 struct pci_devinfo *dinfo = device_get_ivars(child);
2522 pcicfgregs *cfg = &dinfo->cfg;
2523 struct resource_list_entry *rle;
2524 int actual, error, i, irqs[32];
2527 /* Don't let count == 0 get us into trouble. */
2531 /* If rid 0 is allocated, then fail. */
2532 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
2533 if (rle != NULL && rle->res != NULL)
2536 /* Already have allocated messages? */
2537 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
2540 /* If MSI is blacklisted for this system, fail. */
2541 if (pci_msi_blacklisted())
2544 /* MSI capability present? */
2545 if (cfg->msi.msi_location == 0 || !pci_do_msi)
2549 device_printf(child,
2550 "attempting to allocate %d MSI vectors (%d supported)\n",
2551 *count, cfg->msi.msi_msgnum);
2553 /* Don't ask for more than the device supports. */
2554 actual = min(*count, cfg->msi.msi_msgnum);
2556 /* Don't ask for more than 32 messages. */
2557 actual = min(actual, 32);
2559 /* MSI requires power of 2 number of messages. */
2560 if (!powerof2(actual))
2564 /* Try to allocate N messages. */
2565 error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual,
2577 * We now have N actual messages mapped onto SYS_RES_IRQ
2578 * resources in the irqs[] array, so add new resources
2579 * starting at rid 1.
2581 for (i = 0; i < actual; i++)
2582 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1,
2583 irqs[i], irqs[i], 1);
2587 device_printf(child, "using IRQ %d for MSI\n", irqs[0]);
2592 * Be fancy and try to print contiguous runs
2593 * of IRQ values as ranges. 'run' is true if
2594 * we are in a range.
2596 device_printf(child, "using IRQs %d", irqs[0]);
2598 for (i = 1; i < actual; i++) {
2600 /* Still in a run? */
2601 if (irqs[i] == irqs[i - 1] + 1) {
2606 /* Finish previous range. */
2608 printf("-%d", irqs[i - 1]);
2612 /* Start new range. */
2613 printf(",%d", irqs[i]);
2616 /* Unfinished range? */
2618 printf("-%d", irqs[actual - 1]);
2619 printf(" for MSI\n");
2623 /* Update control register with actual count. */
2624 ctrl = cfg->msi.msi_ctrl;
2625 ctrl &= ~PCIM_MSICTRL_MME_MASK;
2626 ctrl |= (ffs(actual) - 1) << 4;
2627 cfg->msi.msi_ctrl = ctrl;
2628 pci_write_config(child, cfg->msi.msi_location + PCIR_MSI_CTRL, ctrl, 2);
2630 /* Update counts of alloc'd messages. */
2631 cfg->msi.msi_alloc = actual;
2632 cfg->msi.msi_handlers = 0;
2637 /* Release the MSI messages associated with this device. */
2639 pci_release_msi_method(device_t dev, device_t child)
2641 struct pci_devinfo *dinfo = device_get_ivars(child);
2642 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2643 struct resource_list_entry *rle;
2644 int error, i, irqs[32];
2646 /* Try MSI-X first. */
2647 error = pci_release_msix(dev, child);
2648 if (error != ENODEV)
2651 /* Do we have any messages to release? */
2652 if (msi->msi_alloc == 0)
2654 KASSERT(msi->msi_alloc <= 32, ("more than 32 alloc'd messages"));
2656 /* Make sure none of the resources are allocated. */
2657 if (msi->msi_handlers > 0)
2659 for (i = 0; i < msi->msi_alloc; i++) {
2660 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2661 KASSERT(rle != NULL, ("missing MSI resource"));
2662 if (rle->res != NULL)
2664 irqs[i] = rle->start;
2667 /* Update control register with 0 count. */
2668 KASSERT(!(msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE),
2669 ("%s: MSI still enabled", __func__));
2670 msi->msi_ctrl &= ~PCIM_MSICTRL_MME_MASK;
2671 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2674 /* Release the messages. */
2675 PCIB_RELEASE_MSI(device_get_parent(dev), child, msi->msi_alloc, irqs);
2676 for (i = 0; i < msi->msi_alloc; i++)
2677 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2679 /* Update alloc count. */
2687 * Return the max supported MSI messages this device supports.
2688 * Basically, assuming the MD code can alloc messages, this function
2689 * should return the maximum value that pci_alloc_msi() can return.
2690 * Thus, it is subject to the tunables, etc.
2693 pci_msi_count_method(device_t dev, device_t child)
2695 struct pci_devinfo *dinfo = device_get_ivars(child);
2696 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2698 if (pci_do_msi && msi->msi_location != 0)
2699 return (msi->msi_msgnum);
2703 /* free pcicfgregs structure and all depending data structures */
2706 pci_freecfg(struct pci_devinfo *dinfo)
2708 struct devlist *devlist_head;
2709 struct pci_map *pm, *next;
2712 devlist_head = &pci_devq;
2714 if (dinfo->cfg.vpd.vpd_reg) {
2715 free(dinfo->cfg.vpd.vpd_ident, M_DEVBUF);
2716 for (i = 0; i < dinfo->cfg.vpd.vpd_rocnt; i++)
2717 free(dinfo->cfg.vpd.vpd_ros[i].value, M_DEVBUF);
2718 free(dinfo->cfg.vpd.vpd_ros, M_DEVBUF);
2719 for (i = 0; i < dinfo->cfg.vpd.vpd_wcnt; i++)
2720 free(dinfo->cfg.vpd.vpd_w[i].value, M_DEVBUF);
2721 free(dinfo->cfg.vpd.vpd_w, M_DEVBUF);
2723 STAILQ_FOREACH_SAFE(pm, &dinfo->cfg.maps, pm_link, next) {
2726 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links);
2727 free(dinfo, M_DEVBUF);
2729 /* increment the generation count */
2732 /* we're losing one device */
2738 * PCI power manangement
2741 pci_set_powerstate_method(device_t dev, device_t child, int state)
2743 struct pci_devinfo *dinfo = device_get_ivars(child);
2744 pcicfgregs *cfg = &dinfo->cfg;
2746 int oldstate, highest, delay;
2748 if (cfg->pp.pp_cap == 0)
2749 return (EOPNOTSUPP);
2752 * Optimize a no state change request away. While it would be OK to
2753 * write to the hardware in theory, some devices have shown odd
2754 * behavior when going from D3 -> D3.
2756 oldstate = pci_get_powerstate(child);
2757 if (oldstate == state)
2761 * The PCI power management specification states that after a state
2762 * transition between PCI power states, system software must
2763 * guarantee a minimal delay before the function accesses the device.
2764 * Compute the worst case delay that we need to guarantee before we
2765 * access the device. Many devices will be responsive much more
2766 * quickly than this delay, but there are some that don't respond
2767 * instantly to state changes. Transitions to/from D3 state require
2768 * 10ms, while D2 requires 200us, and D0/1 require none. The delay
2769 * is done below with DELAY rather than a sleeper function because
2770 * this function can be called from contexts where we cannot sleep.
2772 highest = (oldstate > state) ? oldstate : state;
2773 if (highest == PCI_POWERSTATE_D3)
2775 else if (highest == PCI_POWERSTATE_D2)
2779 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2)
2780 & ~PCIM_PSTAT_DMASK;
2782 case PCI_POWERSTATE_D0:
2783 status |= PCIM_PSTAT_D0;
2785 case PCI_POWERSTATE_D1:
2786 if ((cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) == 0)
2787 return (EOPNOTSUPP);
2788 status |= PCIM_PSTAT_D1;
2790 case PCI_POWERSTATE_D2:
2791 if ((cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) == 0)
2792 return (EOPNOTSUPP);
2793 status |= PCIM_PSTAT_D2;
2795 case PCI_POWERSTATE_D3:
2796 status |= PCIM_PSTAT_D3;
2803 pci_printf(cfg, "Transition from D%d to D%d\n", oldstate,
2806 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 2);
2813 pci_get_powerstate_method(device_t dev, device_t child)
2815 struct pci_devinfo *dinfo = device_get_ivars(child);
2816 pcicfgregs *cfg = &dinfo->cfg;
2820 if (cfg->pp.pp_cap != 0) {
2821 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2);
2822 switch (status & PCIM_PSTAT_DMASK) {
2824 result = PCI_POWERSTATE_D0;
2827 result = PCI_POWERSTATE_D1;
2830 result = PCI_POWERSTATE_D2;
2833 result = PCI_POWERSTATE_D3;
2836 result = PCI_POWERSTATE_UNKNOWN;
2840 /* No support, device is always at D0 */
2841 result = PCI_POWERSTATE_D0;
2847 * Some convenience functions for PCI device drivers.
2850 static __inline void
2851 pci_set_command_bit(device_t dev, device_t child, uint16_t bit)
2855 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2857 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2860 static __inline void
2861 pci_clear_command_bit(device_t dev, device_t child, uint16_t bit)
2865 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2867 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2871 pci_enable_busmaster_method(device_t dev, device_t child)
2873 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2878 pci_disable_busmaster_method(device_t dev, device_t child)
2880 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2885 pci_enable_io_method(device_t dev, device_t child, int space)
2890 case SYS_RES_IOPORT:
2891 bit = PCIM_CMD_PORTEN;
2893 case SYS_RES_MEMORY:
2894 bit = PCIM_CMD_MEMEN;
2899 pci_set_command_bit(dev, child, bit);
2904 pci_disable_io_method(device_t dev, device_t child, int space)
2909 case SYS_RES_IOPORT:
2910 bit = PCIM_CMD_PORTEN;
2912 case SYS_RES_MEMORY:
2913 bit = PCIM_CMD_MEMEN;
2918 pci_clear_command_bit(dev, child, bit);
2923 * New style pci driver. Parent device is either a pci-host-bridge or a
2924 * pci-pci-bridge. Both kinds are represented by instances of pcib.
2928 pci_print_verbose(struct pci_devinfo *dinfo)
2932 pcicfgregs *cfg = &dinfo->cfg;
2934 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n",
2935 cfg->vendor, cfg->device, cfg->revid);
2936 printf("\tdomain=%d, bus=%d, slot=%d, func=%d\n",
2937 cfg->domain, cfg->bus, cfg->slot, cfg->func);
2938 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n",
2939 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype,
2941 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n",
2942 cfg->cmdreg, cfg->statreg, cfg->cachelnsz);
2943 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n",
2944 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt,
2945 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250);
2946 if (cfg->intpin > 0)
2947 printf("\tintpin=%c, irq=%d\n",
2948 cfg->intpin +'a' -1, cfg->intline);
2949 if (cfg->pp.pp_cap) {
2952 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2);
2953 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n",
2954 cfg->pp.pp_cap & PCIM_PCAP_SPEC,
2955 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "",
2956 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "",
2957 status & PCIM_PSTAT_DMASK);
2959 if (cfg->msi.msi_location) {
2962 ctrl = cfg->msi.msi_ctrl;
2963 printf("\tMSI supports %d message%s%s%s\n",
2964 cfg->msi.msi_msgnum,
2965 (cfg->msi.msi_msgnum == 1) ? "" : "s",
2966 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "",
2967 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":"");
2969 if (cfg->msix.msix_location) {
2970 printf("\tMSI-X supports %d message%s ",
2971 cfg->msix.msix_msgnum,
2972 (cfg->msix.msix_msgnum == 1) ? "" : "s");
2973 if (cfg->msix.msix_table_bar == cfg->msix.msix_pba_bar)
2974 printf("in map 0x%x\n",
2975 cfg->msix.msix_table_bar);
2977 printf("in maps 0x%x and 0x%x\n",
2978 cfg->msix.msix_table_bar,
2979 cfg->msix.msix_pba_bar);
2985 pci_porten(device_t dev)
2987 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_PORTEN) != 0;
2991 pci_memen(device_t dev)
2993 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_MEMEN) != 0;
2997 pci_read_bar(device_t dev, int reg, pci_addr_t *mapp, pci_addr_t *testvalp,
3000 struct pci_devinfo *dinfo;
3001 pci_addr_t map, testval;
3006 * The device ROM BAR is special. It is always a 32-bit
3007 * memory BAR. Bit 0 is special and should not be set when
3010 dinfo = device_get_ivars(dev);
3011 if (PCIR_IS_BIOS(&dinfo->cfg, reg)) {
3012 map = pci_read_config(dev, reg, 4);
3013 pci_write_config(dev, reg, 0xfffffffe, 4);
3014 testval = pci_read_config(dev, reg, 4);
3015 pci_write_config(dev, reg, map, 4);
3017 *testvalp = testval;
3023 map = pci_read_config(dev, reg, 4);
3024 ln2range = pci_maprange(map);
3026 map |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3029 * Disable decoding via the command register before
3030 * determining the BAR's length since we will be placing it in
3033 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3034 pci_write_config(dev, PCIR_COMMAND,
3035 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
3038 * Determine the BAR's length by writing all 1's. The bottom
3039 * log_2(size) bits of the BAR will stick as 0 when we read
3042 * NB: according to the PCI Local Bus Specification, rev. 3.0:
3043 * "Software writes 0FFFFFFFFh to both registers, reads them back,
3044 * and combines the result into a 64-bit value." (section 6.2.5.1)
3046 * Writes to both registers must be performed before attempting to
3047 * read back the size value.
3050 pci_write_config(dev, reg, 0xffffffff, 4);
3051 if (ln2range == 64) {
3052 pci_write_config(dev, reg + 4, 0xffffffff, 4);
3053 testval |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3055 testval |= pci_read_config(dev, reg, 4);
3058 * Restore the original value of the BAR. We may have reprogrammed
3059 * the BAR of the low-level console device and when booting verbose,
3060 * we need the console device addressable.
3062 pci_write_config(dev, reg, map, 4);
3064 pci_write_config(dev, reg + 4, map >> 32, 4);
3065 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3068 *testvalp = testval;
3070 *bar64 = (ln2range == 64);
3074 pci_write_bar(device_t dev, struct pci_map *pm, pci_addr_t base)
3076 struct pci_devinfo *dinfo;
3079 /* The device ROM BAR is always a 32-bit memory BAR. */
3080 dinfo = device_get_ivars(dev);
3081 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3084 ln2range = pci_maprange(pm->pm_value);
3085 pci_write_config(dev, pm->pm_reg, base, 4);
3087 pci_write_config(dev, pm->pm_reg + 4, base >> 32, 4);
3088 pm->pm_value = pci_read_config(dev, pm->pm_reg, 4);
3090 pm->pm_value |= (pci_addr_t)pci_read_config(dev,
3091 pm->pm_reg + 4, 4) << 32;
3095 pci_find_bar(device_t dev, int reg)
3097 struct pci_devinfo *dinfo;
3100 dinfo = device_get_ivars(dev);
3101 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3102 if (pm->pm_reg == reg)
3109 pci_bar_enabled(device_t dev, struct pci_map *pm)
3111 struct pci_devinfo *dinfo;
3114 dinfo = device_get_ivars(dev);
3115 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) &&
3116 !(pm->pm_value & PCIM_BIOS_ENABLE))
3118 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3119 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) || PCI_BAR_MEM(pm->pm_value))
3120 return ((cmd & PCIM_CMD_MEMEN) != 0);
3122 return ((cmd & PCIM_CMD_PORTEN) != 0);
3126 pci_add_bar(device_t dev, int reg, pci_addr_t value, pci_addr_t size)
3128 struct pci_devinfo *dinfo;
3129 struct pci_map *pm, *prev;
3131 dinfo = device_get_ivars(dev);
3132 pm = malloc(sizeof(*pm), M_DEVBUF, M_WAITOK | M_ZERO);
3134 pm->pm_value = value;
3136 STAILQ_FOREACH(prev, &dinfo->cfg.maps, pm_link) {
3137 KASSERT(prev->pm_reg != pm->pm_reg, ("duplicate map %02x",
3139 if (STAILQ_NEXT(prev, pm_link) == NULL ||
3140 STAILQ_NEXT(prev, pm_link)->pm_reg > pm->pm_reg)
3144 STAILQ_INSERT_AFTER(&dinfo->cfg.maps, prev, pm, pm_link);
3146 STAILQ_INSERT_TAIL(&dinfo->cfg.maps, pm, pm_link);
3151 pci_restore_bars(device_t dev)
3153 struct pci_devinfo *dinfo;
3157 dinfo = device_get_ivars(dev);
3158 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3159 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3162 ln2range = pci_maprange(pm->pm_value);
3163 pci_write_config(dev, pm->pm_reg, pm->pm_value, 4);
3165 pci_write_config(dev, pm->pm_reg + 4,
3166 pm->pm_value >> 32, 4);
3171 * Add a resource based on a pci map register. Return 1 if the map
3172 * register is a 32bit map register or 2 if it is a 64bit register.
3175 pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl,
3176 int force, int prefetch)
3179 pci_addr_t base, map, testval;
3180 pci_addr_t start, end, count;
3181 int barlen, basezero, flags, maprange, mapsize, type;
3183 struct resource *res;
3186 * The BAR may already exist if the device is a CardBus card
3187 * whose CIS is stored in this BAR.
3189 pm = pci_find_bar(dev, reg);
3191 maprange = pci_maprange(pm->pm_value);
3192 barlen = maprange == 64 ? 2 : 1;
3196 pci_read_bar(dev, reg, &map, &testval, NULL);
3197 if (PCI_BAR_MEM(map)) {
3198 type = SYS_RES_MEMORY;
3199 if (map & PCIM_BAR_MEM_PREFETCH)
3202 type = SYS_RES_IOPORT;
3203 mapsize = pci_mapsize(testval);
3204 base = pci_mapbase(map);
3205 #ifdef __PCI_BAR_ZERO_VALID
3208 basezero = base == 0;
3210 maprange = pci_maprange(map);
3211 barlen = maprange == 64 ? 2 : 1;
3214 * For I/O registers, if bottom bit is set, and the next bit up
3215 * isn't clear, we know we have a BAR that doesn't conform to the
3216 * spec, so ignore it. Also, sanity check the size of the data
3217 * areas to the type of memory involved. Memory must be at least
3218 * 16 bytes in size, while I/O ranges must be at least 4.
3220 if (PCI_BAR_IO(testval) && (testval & PCIM_BAR_IO_RESERVED) != 0)
3222 if ((type == SYS_RES_MEMORY && mapsize < 4) ||
3223 (type == SYS_RES_IOPORT && mapsize < 2))
3226 /* Save a record of this BAR. */
3227 pm = pci_add_bar(dev, reg, map, mapsize);
3229 printf("\tmap[%02x]: type %s, range %2d, base %#jx, size %2d",
3230 reg, pci_maptype(map), maprange, (uintmax_t)base, mapsize);
3231 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3232 printf(", port disabled\n");
3233 else if (type == SYS_RES_MEMORY && !pci_memen(dev))
3234 printf(", memory disabled\n");
3236 printf(", enabled\n");
3240 * If base is 0, then we have problems if this architecture does
3241 * not allow that. It is best to ignore such entries for the
3242 * moment. These will be allocated later if the driver specifically
3243 * requests them. However, some removable buses look better when
3244 * all resources are allocated, so allow '0' to be overriden.
3246 * Similarly treat maps whose values is the same as the test value
3247 * read back. These maps have had all f's written to them by the
3248 * BIOS in an attempt to disable the resources.
3250 if (!force && (basezero || map == testval))
3252 if ((u_long)base != base) {
3254 "pci%d:%d:%d:%d bar %#x too many address bits",
3255 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev),
3256 pci_get_function(dev), reg);
3261 * This code theoretically does the right thing, but has
3262 * undesirable side effects in some cases where peripherals
3263 * respond oddly to having these bits enabled. Let the user
3264 * be able to turn them off (since pci_enable_io_modes is 1 by
3267 if (pci_enable_io_modes) {
3268 /* Turn on resources that have been left off by a lazy BIOS */
3269 if (type == SYS_RES_IOPORT && !pci_porten(dev)) {
3270 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3271 cmd |= PCIM_CMD_PORTEN;
3272 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3274 if (type == SYS_RES_MEMORY && !pci_memen(dev)) {
3275 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3276 cmd |= PCIM_CMD_MEMEN;
3277 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3280 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3282 if (type == SYS_RES_MEMORY && !pci_memen(dev))
3286 count = (pci_addr_t)1 << mapsize;
3287 flags = RF_ALIGNMENT_LOG2(mapsize);
3289 flags |= RF_PREFETCHABLE;
3290 if (basezero || base == pci_mapbase(testval) || pci_clear_bars) {
3291 start = 0; /* Let the parent decide. */
3295 end = base + count - 1;
3297 resource_list_add(rl, type, reg, start, end, count);
3300 * Try to allocate the resource for this BAR from our parent
3301 * so that this resource range is already reserved. The
3302 * driver for this device will later inherit this resource in
3303 * pci_alloc_resource().
3305 res = resource_list_reserve(rl, bus, dev, type, ®, start, end, count,
3307 if ((pci_do_realloc_bars
3308 || pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_REALLOC_BAR))
3309 && res == NULL && (start != 0 || end != ~0)) {
3311 * If the allocation fails, try to allocate a resource for
3312 * this BAR using any available range. The firmware felt
3313 * it was important enough to assign a resource, so don't
3314 * disable decoding if we can help it.
3316 resource_list_delete(rl, type, reg);
3317 resource_list_add(rl, type, reg, 0, ~0, count);
3318 res = resource_list_reserve(rl, bus, dev, type, ®, 0, ~0,
3323 * If the allocation fails, delete the resource list entry
3324 * and disable decoding for this device.
3326 * If the driver requests this resource in the future,
3327 * pci_reserve_map() will try to allocate a fresh
3330 resource_list_delete(rl, type, reg);
3331 pci_disable_io(dev, type);
3334 "pci%d:%d:%d:%d bar %#x failed to allocate\n",
3335 pci_get_domain(dev), pci_get_bus(dev),
3336 pci_get_slot(dev), pci_get_function(dev), reg);
3338 start = rman_get_start(res);
3339 pci_write_bar(dev, pm, start);
3345 * For ATA devices we need to decide early what addressing mode to use.
3346 * Legacy demands that the primary and secondary ATA ports sits on the
3347 * same addresses that old ISA hardware did. This dictates that we use
3348 * those addresses and ignore the BAR's if we cannot set PCI native
3352 pci_ata_maps(device_t bus, device_t dev, struct resource_list *rl, int force,
3353 uint32_t prefetchmask)
3355 int rid, type, progif;
3357 /* if this device supports PCI native addressing use it */
3358 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3359 if ((progif & 0x8a) == 0x8a) {
3360 if (pci_mapbase(pci_read_config(dev, PCIR_BAR(0), 4)) &&
3361 pci_mapbase(pci_read_config(dev, PCIR_BAR(2), 4))) {
3362 printf("Trying ATA native PCI addressing mode\n");
3363 pci_write_config(dev, PCIR_PROGIF, progif | 0x05, 1);
3367 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3368 type = SYS_RES_IOPORT;
3369 if (progif & PCIP_STORAGE_IDE_MODEPRIM) {
3370 pci_add_map(bus, dev, PCIR_BAR(0), rl, force,
3371 prefetchmask & (1 << 0));
3372 pci_add_map(bus, dev, PCIR_BAR(1), rl, force,
3373 prefetchmask & (1 << 1));
3376 resource_list_add(rl, type, rid, 0x1f0, 0x1f7, 8);
3377 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x1f0,
3380 resource_list_add(rl, type, rid, 0x3f6, 0x3f6, 1);
3381 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x3f6,
3384 if (progif & PCIP_STORAGE_IDE_MODESEC) {
3385 pci_add_map(bus, dev, PCIR_BAR(2), rl, force,
3386 prefetchmask & (1 << 2));
3387 pci_add_map(bus, dev, PCIR_BAR(3), rl, force,
3388 prefetchmask & (1 << 3));
3391 resource_list_add(rl, type, rid, 0x170, 0x177, 8);
3392 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x170,
3395 resource_list_add(rl, type, rid, 0x376, 0x376, 1);
3396 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x376,
3399 pci_add_map(bus, dev, PCIR_BAR(4), rl, force,
3400 prefetchmask & (1 << 4));
3401 pci_add_map(bus, dev, PCIR_BAR(5), rl, force,
3402 prefetchmask & (1 << 5));
3406 pci_assign_interrupt(device_t bus, device_t dev, int force_route)
3408 struct pci_devinfo *dinfo = device_get_ivars(dev);
3409 pcicfgregs *cfg = &dinfo->cfg;
3410 char tunable_name[64];
3413 /* Has to have an intpin to have an interrupt. */
3414 if (cfg->intpin == 0)
3417 /* Let the user override the IRQ with a tunable. */
3418 irq = PCI_INVALID_IRQ;
3419 snprintf(tunable_name, sizeof(tunable_name),
3420 "hw.pci%d.%d.%d.INT%c.irq",
3421 cfg->domain, cfg->bus, cfg->slot, cfg->intpin + 'A' - 1);
3422 if (TUNABLE_INT_FETCH(tunable_name, &irq) && (irq >= 255 || irq <= 0))
3423 irq = PCI_INVALID_IRQ;
3426 * If we didn't get an IRQ via the tunable, then we either use the
3427 * IRQ value in the intline register or we ask the bus to route an
3428 * interrupt for us. If force_route is true, then we only use the
3429 * value in the intline register if the bus was unable to assign an
3432 if (!PCI_INTERRUPT_VALID(irq)) {
3433 if (!PCI_INTERRUPT_VALID(cfg->intline) || force_route)
3434 irq = PCI_ASSIGN_INTERRUPT(bus, dev);
3435 if (!PCI_INTERRUPT_VALID(irq))
3439 /* If after all that we don't have an IRQ, just bail. */
3440 if (!PCI_INTERRUPT_VALID(irq))
3443 /* Update the config register if it changed. */
3444 if (irq != cfg->intline) {
3446 pci_write_config(dev, PCIR_INTLINE, irq, 1);
3449 /* Add this IRQ as rid 0 interrupt resource. */
3450 resource_list_add(&dinfo->resources, SYS_RES_IRQ, 0, irq, irq, 1);
3453 /* Perform early OHCI takeover from SMM. */
3455 ohci_early_takeover(device_t self)
3457 struct resource *res;
3463 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3467 ctl = bus_read_4(res, OHCI_CONTROL);
3468 if (ctl & OHCI_IR) {
3470 printf("ohci early: "
3471 "SMM active, request owner change\n");
3472 bus_write_4(res, OHCI_COMMAND_STATUS, OHCI_OCR);
3473 for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) {
3475 ctl = bus_read_4(res, OHCI_CONTROL);
3477 if (ctl & OHCI_IR) {
3479 printf("ohci early: "
3480 "SMM does not respond, resetting\n");
3481 bus_write_4(res, OHCI_CONTROL, OHCI_HCFS_RESET);
3483 /* Disable interrupts */
3484 bus_write_4(res, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS);
3487 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3490 /* Perform early UHCI takeover from SMM. */
3492 uhci_early_takeover(device_t self)
3494 struct resource *res;
3498 * Set the PIRQD enable bit and switch off all the others. We don't
3499 * want legacy support to interfere with us XXX Does this also mean
3500 * that the BIOS won't touch the keyboard anymore if it is connected
3501 * to the ports of the root hub?
3503 pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2);
3505 /* Disable interrupts */
3506 rid = PCI_UHCI_BASE_REG;
3507 res = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE);
3509 bus_write_2(res, UHCI_INTR, 0);
3510 bus_release_resource(self, SYS_RES_IOPORT, rid, res);
3514 /* Perform early EHCI takeover from SMM. */
3516 ehci_early_takeover(device_t self)
3518 struct resource *res;
3528 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3532 cparams = bus_read_4(res, EHCI_HCCPARAMS);
3534 /* Synchronise with the BIOS if it owns the controller. */
3535 for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
3536 eecp = EHCI_EECP_NEXT(eec)) {
3537 eec = pci_read_config(self, eecp, 4);
3538 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
3541 bios_sem = pci_read_config(self, eecp +
3542 EHCI_LEGSUP_BIOS_SEM, 1);
3543 if (bios_sem == 0) {
3547 printf("ehci early: "
3548 "SMM active, request owner change\n");
3550 pci_write_config(self, eecp + EHCI_LEGSUP_OS_SEM, 1, 1);
3552 for (i = 0; (i < 100) && (bios_sem != 0); i++) {
3554 bios_sem = pci_read_config(self, eecp +
3555 EHCI_LEGSUP_BIOS_SEM, 1);
3558 if (bios_sem != 0) {
3560 printf("ehci early: "
3561 "SMM does not respond\n");
3563 /* Disable interrupts */
3564 offs = EHCI_CAPLENGTH(bus_read_4(res, EHCI_CAPLEN_HCIVERSION));
3565 bus_write_4(res, offs + EHCI_USBINTR, 0);
3567 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3570 /* Perform early XHCI takeover from SMM. */
3572 xhci_early_takeover(device_t self)
3574 struct resource *res;
3584 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3588 cparams = bus_read_4(res, XHCI_HCSPARAMS0);
3592 /* Synchronise with the BIOS if it owns the controller. */
3593 for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
3594 eecp += XHCI_XECP_NEXT(eec) << 2) {
3595 eec = bus_read_4(res, eecp);
3597 if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
3600 bios_sem = bus_read_1(res, eecp + XHCI_XECP_BIOS_SEM);
3605 printf("xhci early: "
3606 "SMM active, request owner change\n");
3608 bus_write_1(res, eecp + XHCI_XECP_OS_SEM, 1);
3610 /* wait a maximum of 5 second */
3612 for (i = 0; (i < 5000) && (bios_sem != 0); i++) {
3614 bios_sem = bus_read_1(res, eecp +
3615 XHCI_XECP_BIOS_SEM);
3618 if (bios_sem != 0) {
3620 printf("xhci early: "
3621 "SMM does not respond\n");
3624 /* Disable interrupts */
3625 offs = bus_read_1(res, XHCI_CAPLENGTH);
3626 bus_write_4(res, offs + XHCI_USBCMD, 0);
3627 bus_read_4(res, offs + XHCI_USBSTS);
3629 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3632 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
3634 pci_reserve_secbus(device_t bus, device_t dev, pcicfgregs *cfg,
3635 struct resource_list *rl)
3637 struct resource *res;
3639 rman_res_t start, end, count;
3640 int rid, sec_bus, sec_reg, sub_bus, sub_reg, sup_bus;
3642 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3643 case PCIM_HDRTYPE_BRIDGE:
3644 sec_reg = PCIR_SECBUS_1;
3645 sub_reg = PCIR_SUBBUS_1;
3647 case PCIM_HDRTYPE_CARDBUS:
3648 sec_reg = PCIR_SECBUS_2;
3649 sub_reg = PCIR_SUBBUS_2;
3656 * If the existing bus range is valid, attempt to reserve it
3657 * from our parent. If this fails for any reason, clear the
3658 * secbus and subbus registers.
3660 * XXX: Should we reset sub_bus to sec_bus if it is < sec_bus?
3661 * This would at least preserve the existing sec_bus if it is
3664 sec_bus = PCI_READ_CONFIG(bus, dev, sec_reg, 1);
3665 sub_bus = PCI_READ_CONFIG(bus, dev, sub_reg, 1);
3667 /* Quirk handling. */
3668 switch (pci_get_devid(dev)) {
3669 case 0x12258086: /* Intel 82454KX/GX (Orion) */
3670 sup_bus = pci_read_config(dev, 0x41, 1);
3671 if (sup_bus != 0xff) {
3672 sec_bus = sup_bus + 1;
3673 sub_bus = sup_bus + 1;
3674 PCI_WRITE_CONFIG(bus, dev, sec_reg, sec_bus, 1);
3675 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3680 /* Compaq R3000 BIOS sets wrong subordinate bus number. */
3681 if ((cp = kern_getenv("smbios.planar.maker")) == NULL)
3683 if (strncmp(cp, "Compal", 6) != 0) {
3688 if ((cp = kern_getenv("smbios.planar.product")) == NULL)
3690 if (strncmp(cp, "08A0", 4) != 0) {
3695 if (sub_bus < 0xa) {
3697 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3703 printf("\tsecbus=%d, subbus=%d\n", sec_bus, sub_bus);
3704 if (sec_bus > 0 && sub_bus >= sec_bus) {
3707 count = end - start + 1;
3709 resource_list_add(rl, PCI_RES_BUS, 0, 0, ~0, count);
3712 * If requested, clear secondary bus registers in
3713 * bridge devices to force a complete renumbering
3714 * rather than reserving the existing range. However,
3715 * preserve the existing size.
3717 if (pci_clear_buses)
3721 res = resource_list_reserve(rl, bus, dev, PCI_RES_BUS, &rid,
3722 start, end, count, 0);
3728 "pci%d:%d:%d:%d secbus failed to allocate\n",
3729 pci_get_domain(dev), pci_get_bus(dev),
3730 pci_get_slot(dev), pci_get_function(dev));
3734 PCI_WRITE_CONFIG(bus, dev, sec_reg, 0, 1);
3735 PCI_WRITE_CONFIG(bus, dev, sub_reg, 0, 1);
3738 static struct resource *
3739 pci_alloc_secbus(device_t dev, device_t child, int *rid, rman_res_t start,
3740 rman_res_t end, rman_res_t count, u_int flags)
3742 struct pci_devinfo *dinfo;
3744 struct resource_list *rl;
3745 struct resource *res;
3746 int sec_reg, sub_reg;
3748 dinfo = device_get_ivars(child);
3750 rl = &dinfo->resources;
3751 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3752 case PCIM_HDRTYPE_BRIDGE:
3753 sec_reg = PCIR_SECBUS_1;
3754 sub_reg = PCIR_SUBBUS_1;
3756 case PCIM_HDRTYPE_CARDBUS:
3757 sec_reg = PCIR_SECBUS_2;
3758 sub_reg = PCIR_SUBBUS_2;
3767 if (resource_list_find(rl, PCI_RES_BUS, *rid) == NULL)
3768 resource_list_add(rl, PCI_RES_BUS, *rid, start, end, count);
3769 if (!resource_list_reserved(rl, PCI_RES_BUS, *rid)) {
3770 res = resource_list_reserve(rl, dev, child, PCI_RES_BUS, rid,
3771 start, end, count, flags & ~RF_ACTIVE);
3773 resource_list_delete(rl, PCI_RES_BUS, *rid);
3774 device_printf(child, "allocating %ju bus%s failed\n",
3775 count, count == 1 ? "" : "es");
3779 device_printf(child,
3780 "Lazy allocation of %ju bus%s at %ju\n", count,
3781 count == 1 ? "" : "es", rman_get_start(res));
3782 PCI_WRITE_CONFIG(dev, child, sec_reg, rman_get_start(res), 1);
3783 PCI_WRITE_CONFIG(dev, child, sub_reg, rman_get_end(res), 1);
3785 return (resource_list_alloc(rl, dev, child, PCI_RES_BUS, rid, start,
3786 end, count, flags));
3791 pci_ea_bei_to_rid(device_t dev, int bei)
3794 struct pci_devinfo *dinfo;
3796 struct pcicfg_iov *iov;
3798 dinfo = device_get_ivars(dev);
3799 iov = dinfo->cfg.iov;
3801 iov_pos = iov->iov_pos;
3806 /* Check if matches BAR */
3807 if ((bei >= PCIM_EA_BEI_BAR_0) &&
3808 (bei <= PCIM_EA_BEI_BAR_5))
3809 return (PCIR_BAR(bei));
3812 if (bei == PCIM_EA_BEI_ROM)
3816 /* Check if matches VF_BAR */
3817 if ((iov != NULL) && (bei >= PCIM_EA_BEI_VF_BAR_0) &&
3818 (bei <= PCIM_EA_BEI_VF_BAR_5))
3819 return (PCIR_SRIOV_BAR(bei - PCIM_EA_BEI_VF_BAR_0) +
3827 pci_ea_is_enabled(device_t dev, int rid)
3829 struct pci_ea_entry *ea;
3830 struct pci_devinfo *dinfo;
3832 dinfo = device_get_ivars(dev);
3834 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3835 if (pci_ea_bei_to_rid(dev, ea->eae_bei) == rid)
3836 return ((ea->eae_flags & PCIM_EA_ENABLE) > 0);
3843 pci_add_resources_ea(device_t bus, device_t dev, int alloc_iov)
3845 struct pci_ea_entry *ea;
3846 struct pci_devinfo *dinfo;
3847 pci_addr_t start, end, count;
3848 struct resource_list *rl;
3849 int type, flags, rid;
3850 struct resource *res;
3853 struct pcicfg_iov *iov;
3856 dinfo = device_get_ivars(dev);
3857 rl = &dinfo->resources;
3861 iov = dinfo->cfg.iov;
3864 if (dinfo->cfg.ea.ea_location == 0)
3867 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3870 * TODO: Ignore EA-BAR if is not enabled.
3871 * Currently the EA implementation supports
3872 * only situation, where EA structure contains
3873 * predefined entries. In case they are not enabled
3874 * leave them unallocated and proceed with
3875 * a legacy-BAR mechanism.
3877 if ((ea->eae_flags & PCIM_EA_ENABLE) == 0)
3880 switch ((ea->eae_flags & PCIM_EA_PP) >> PCIM_EA_PP_OFFSET) {
3881 case PCIM_EA_P_MEM_PREFETCH:
3882 case PCIM_EA_P_VF_MEM_PREFETCH:
3883 flags = RF_PREFETCHABLE;
3885 case PCIM_EA_P_VF_MEM:
3887 type = SYS_RES_MEMORY;
3890 type = SYS_RES_IOPORT;
3896 if (alloc_iov != 0) {
3898 /* Allocating IOV, confirm BEI matches */
3899 if ((ea->eae_bei < PCIM_EA_BEI_VF_BAR_0) ||
3900 (ea->eae_bei > PCIM_EA_BEI_VF_BAR_5))
3906 /* Allocating BAR, confirm BEI matches */
3907 if (((ea->eae_bei < PCIM_EA_BEI_BAR_0) ||
3908 (ea->eae_bei > PCIM_EA_BEI_BAR_5)) &&
3909 (ea->eae_bei != PCIM_EA_BEI_ROM))
3913 rid = pci_ea_bei_to_rid(dev, ea->eae_bei);
3917 /* Skip resources already allocated by EA */
3918 if ((resource_list_find(rl, SYS_RES_MEMORY, rid) != NULL) ||
3919 (resource_list_find(rl, SYS_RES_IOPORT, rid) != NULL))
3922 start = ea->eae_base;
3923 count = ea->eae_max_offset + 1;
3926 count = count * iov->iov_num_vfs;
3928 end = start + count - 1;
3932 resource_list_add(rl, type, rid, start, end, count);
3933 res = resource_list_reserve(rl, bus, dev, type, &rid, start, end, count,
3936 resource_list_delete(rl, type, rid);
3939 * Failed to allocate using EA, disable entry.
3940 * Another attempt to allocation will be performed
3941 * further, but this time using legacy BAR registers
3943 tmp = pci_read_config(dev, ea->eae_cfg_offset, 4);
3944 tmp &= ~PCIM_EA_ENABLE;
3945 pci_write_config(dev, ea->eae_cfg_offset, tmp, 4);
3948 * Disabling entry might fail in case it is hardwired.
3949 * Read flags again to match current status.
3951 ea->eae_flags = pci_read_config(dev, ea->eae_cfg_offset, 4);
3956 /* As per specification, fill BAR with zeros */
3957 pci_write_config(dev, rid, 0, 4);
3962 pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask)
3964 struct pci_devinfo *dinfo;
3966 struct resource_list *rl;
3967 const struct pci_quirk *q;
3971 dinfo = device_get_ivars(dev);
3973 rl = &dinfo->resources;
3974 devid = (cfg->device << 16) | cfg->vendor;
3976 /* Allocate resources using Enhanced Allocation */
3977 pci_add_resources_ea(bus, dev, 0);
3979 /* ATA devices needs special map treatment */
3980 if ((pci_get_class(dev) == PCIC_STORAGE) &&
3981 (pci_get_subclass(dev) == PCIS_STORAGE_IDE) &&
3982 ((pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) ||
3983 (!pci_read_config(dev, PCIR_BAR(0), 4) &&
3984 !pci_read_config(dev, PCIR_BAR(2), 4))) )
3985 pci_ata_maps(bus, dev, rl, force, prefetchmask);
3987 for (i = 0; i < cfg->nummaps;) {
3988 /* Skip resources already managed by EA */
3989 if ((resource_list_find(rl, SYS_RES_MEMORY, PCIR_BAR(i)) != NULL) ||
3990 (resource_list_find(rl, SYS_RES_IOPORT, PCIR_BAR(i)) != NULL) ||
3991 pci_ea_is_enabled(dev, PCIR_BAR(i))) {
3997 * Skip quirked resources.
3999 for (q = &pci_quirks[0]; q->devid != 0; q++)
4000 if (q->devid == devid &&
4001 q->type == PCI_QUIRK_UNMAP_REG &&
4002 q->arg1 == PCIR_BAR(i))
4004 if (q->devid != 0) {
4008 i += pci_add_map(bus, dev, PCIR_BAR(i), rl, force,
4009 prefetchmask & (1 << i));
4013 * Add additional, quirked resources.
4015 for (q = &pci_quirks[0]; q->devid != 0; q++)
4016 if (q->devid == devid && q->type == PCI_QUIRK_MAP_REG)
4017 pci_add_map(bus, dev, q->arg1, rl, force, 0);
4019 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) {
4020 #ifdef __PCI_REROUTE_INTERRUPT
4022 * Try to re-route interrupts. Sometimes the BIOS or
4023 * firmware may leave bogus values in these registers.
4024 * If the re-route fails, then just stick with what we
4027 pci_assign_interrupt(bus, dev, 1);
4029 pci_assign_interrupt(bus, dev, 0);
4033 if (pci_usb_takeover && pci_get_class(dev) == PCIC_SERIALBUS &&
4034 pci_get_subclass(dev) == PCIS_SERIALBUS_USB) {
4035 if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_XHCI)
4036 xhci_early_takeover(dev);
4037 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_EHCI)
4038 ehci_early_takeover(dev);
4039 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_OHCI)
4040 ohci_early_takeover(dev);
4041 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI)
4042 uhci_early_takeover(dev);
4045 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
4047 * Reserve resources for secondary bus ranges behind bridge
4050 pci_reserve_secbus(bus, dev, cfg, rl);
4054 static struct pci_devinfo *
4055 pci_identify_function(device_t pcib, device_t dev, int domain, int busno,
4058 struct pci_devinfo *dinfo;
4060 dinfo = pci_read_device(pcib, dev, domain, busno, slot, func);
4062 pci_add_child(dev, dinfo);
4068 pci_add_children(device_t dev, int domain, int busno)
4070 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4071 device_t pcib = device_get_parent(dev);
4072 struct pci_devinfo *dinfo;
4074 int s, f, pcifunchigh;
4079 * Try to detect a device at slot 0, function 0. If it exists, try to
4080 * enable ARI. We must enable ARI before detecting the rest of the
4081 * functions on this bus as ARI changes the set of slots and functions
4082 * that are legal on this bus.
4084 dinfo = pci_identify_function(pcib, dev, domain, busno, 0, 0);
4085 if (dinfo != NULL && pci_enable_ari)
4086 PCIB_TRY_ENABLE_ARI(pcib, dinfo->cfg.dev);
4089 * Start looking for new devices on slot 0 at function 1 because we
4090 * just identified the device at slot 0, function 0.
4094 maxslots = PCIB_MAXSLOTS(pcib);
4095 for (s = 0; s <= maxslots; s++, first_func = 0) {
4099 hdrtype = REG(PCIR_HDRTYPE, 1);
4100 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4102 if (hdrtype & PCIM_MFDEV)
4103 pcifunchigh = PCIB_MAXFUNCS(pcib);
4104 for (f = first_func; f <= pcifunchigh; f++)
4105 pci_identify_function(pcib, dev, domain, busno, s, f);
4111 pci_rescan_method(device_t dev)
4113 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4114 device_t pcib = device_get_parent(dev);
4115 device_t child, *devlist, *unchanged;
4116 int devcount, error, i, j, maxslots, oldcount;
4117 int busno, domain, s, f, pcifunchigh;
4120 /* No need to check for ARI on a rescan. */
4121 error = device_get_children(dev, &devlist, &devcount);
4124 if (devcount != 0) {
4125 unchanged = malloc(devcount * sizeof(device_t), M_TEMP,
4127 if (unchanged == NULL) {
4128 free(devlist, M_TEMP);
4134 domain = pcib_get_domain(dev);
4135 busno = pcib_get_bus(dev);
4136 maxslots = PCIB_MAXSLOTS(pcib);
4137 for (s = 0; s <= maxslots; s++) {
4138 /* If function 0 is not present, skip to the next slot. */
4140 if (REG(PCIR_VENDOR, 2) == 0xffff)
4143 hdrtype = REG(PCIR_HDRTYPE, 1);
4144 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4146 if (hdrtype & PCIM_MFDEV)
4147 pcifunchigh = PCIB_MAXFUNCS(pcib);
4148 for (f = 0; f <= pcifunchigh; f++) {
4149 if (REG(PCIR_VENDOR, 2) == 0xffff)
4153 * Found a valid function. Check if a
4154 * device_t for this device already exists.
4156 for (i = 0; i < devcount; i++) {
4160 if (pci_get_slot(child) == s &&
4161 pci_get_function(child) == f) {
4162 unchanged[i] = child;
4167 pci_identify_function(pcib, dev, domain, busno, s, f);
4172 /* Remove devices that are no longer present. */
4173 for (i = 0; i < devcount; i++) {
4174 if (unchanged[i] != NULL)
4176 device_delete_child(dev, devlist[i]);
4179 free(devlist, M_TEMP);
4180 oldcount = devcount;
4182 /* Try to attach the devices just added. */
4183 error = device_get_children(dev, &devlist, &devcount);
4185 free(unchanged, M_TEMP);
4189 for (i = 0; i < devcount; i++) {
4190 for (j = 0; j < oldcount; j++) {
4191 if (devlist[i] == unchanged[j])
4195 device_probe_and_attach(devlist[i]);
4199 free(unchanged, M_TEMP);
4200 free(devlist, M_TEMP);
4207 pci_add_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
4210 struct pci_devinfo *vf_dinfo;
4212 int busno, slot, func;
4214 pcib = device_get_parent(bus);
4216 PCIB_DECODE_RID(pcib, rid, &busno, &slot, &func);
4218 vf_dinfo = pci_fill_devinfo(pcib, bus, pci_get_domain(pcib), busno,
4219 slot, func, vid, did);
4221 vf_dinfo->cfg.flags |= PCICFG_VF;
4222 pci_add_child(bus, vf_dinfo);
4224 return (vf_dinfo->cfg.dev);
4228 pci_create_iov_child_method(device_t bus, device_t pf, uint16_t rid,
4229 uint16_t vid, uint16_t did)
4232 return (pci_add_iov_child(bus, pf, rid, vid, did));
4237 pci_add_child_clear_aer(device_t dev, struct pci_devinfo *dinfo)
4243 if (dinfo->cfg.pcie.pcie_location != 0 &&
4244 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT) {
4245 r2 = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4247 r2 &= ~(PCIEM_ROOT_CTL_SERR_CORR |
4248 PCIEM_ROOT_CTL_SERR_NONFATAL | PCIEM_ROOT_CTL_SERR_FATAL);
4249 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4250 PCIER_ROOT_CTL, r2, 2);
4252 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
4253 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
4254 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
4255 if (r != 0 && bootverbose) {
4256 pci_printf(&dinfo->cfg,
4257 "clearing AER UC 0x%08x -> 0x%08x\n",
4258 r, pci_read_config(dev, aer + PCIR_AER_UC_STATUS,
4262 r = pci_read_config(dev, aer + PCIR_AER_UC_MASK, 4);
4263 r &= ~(PCIM_AER_UC_TRAINING_ERROR |
4264 PCIM_AER_UC_DL_PROTOCOL_ERROR |
4265 PCIM_AER_UC_SURPRISE_LINK_DOWN |
4266 PCIM_AER_UC_POISONED_TLP |
4267 PCIM_AER_UC_FC_PROTOCOL_ERROR |
4268 PCIM_AER_UC_COMPLETION_TIMEOUT |
4269 PCIM_AER_UC_COMPLETER_ABORT |
4270 PCIM_AER_UC_UNEXPECTED_COMPLETION |
4271 PCIM_AER_UC_RECEIVER_OVERFLOW |
4272 PCIM_AER_UC_MALFORMED_TLP |
4273 PCIM_AER_UC_ECRC_ERROR |
4274 PCIM_AER_UC_UNSUPPORTED_REQUEST |
4275 PCIM_AER_UC_ACS_VIOLATION |
4276 PCIM_AER_UC_INTERNAL_ERROR |
4277 PCIM_AER_UC_MC_BLOCKED_TLP |
4278 PCIM_AER_UC_ATOMIC_EGRESS_BLK |
4279 PCIM_AER_UC_TLP_PREFIX_BLOCKED);
4280 pci_write_config(dev, aer + PCIR_AER_UC_MASK, r, 4);
4282 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
4283 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
4284 if (r != 0 && bootverbose) {
4285 pci_printf(&dinfo->cfg,
4286 "clearing AER COR 0x%08x -> 0x%08x\n",
4287 r, pci_read_config(dev, aer + PCIR_AER_COR_STATUS,
4291 r = pci_read_config(dev, aer + PCIR_AER_COR_MASK, 4);
4292 r &= ~(PCIM_AER_COR_RECEIVER_ERROR |
4293 PCIM_AER_COR_BAD_TLP |
4294 PCIM_AER_COR_BAD_DLLP |
4295 PCIM_AER_COR_REPLAY_ROLLOVER |
4296 PCIM_AER_COR_REPLAY_TIMEOUT |
4297 PCIM_AER_COR_ADVISORY_NF_ERROR |
4298 PCIM_AER_COR_INTERNAL_ERROR |
4299 PCIM_AER_COR_HEADER_LOG_OVFLOW);
4300 pci_write_config(dev, aer + PCIR_AER_COR_MASK, r, 4);
4302 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4303 PCIER_DEVICE_CTL, 2);
4304 r |= PCIEM_CTL_COR_ENABLE | PCIEM_CTL_NFER_ENABLE |
4305 PCIEM_CTL_FER_ENABLE | PCIEM_CTL_URR_ENABLE;
4306 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4307 PCIER_DEVICE_CTL, r, 2);
4312 pci_add_child(device_t bus, struct pci_devinfo *dinfo)
4316 dinfo->cfg.dev = dev = device_add_child(bus, NULL, -1);
4317 device_set_ivars(dev, dinfo);
4318 resource_list_init(&dinfo->resources);
4319 pci_cfg_save(dev, dinfo, 0);
4320 pci_cfg_restore(dev, dinfo);
4321 pci_print_verbose(dinfo);
4322 pci_add_resources(bus, dev, 0, 0);
4323 pci_child_added(dinfo->cfg.dev);
4325 if (pci_clear_aer_on_attach)
4326 pci_add_child_clear_aer(dev, dinfo);
4328 EVENTHANDLER_INVOKE(pci_add_device, dinfo->cfg.dev);
4332 pci_child_added_method(device_t dev, device_t child)
4338 pci_probe(device_t dev)
4341 device_set_desc(dev, "PCI bus");
4343 /* Allow other subclasses to override this driver. */
4344 return (BUS_PROBE_GENERIC);
4348 pci_attach_common(device_t dev)
4350 struct pci_softc *sc;
4356 sc = device_get_softc(dev);
4357 domain = pcib_get_domain(dev);
4358 busno = pcib_get_bus(dev);
4361 sc->sc_bus = bus_alloc_resource(dev, PCI_RES_BUS, &rid, busno, busno,
4363 if (sc->sc_bus == NULL) {
4364 device_printf(dev, "failed to allocate bus number\n");
4369 device_printf(dev, "domain=%d, physical bus=%d\n",
4371 sc->sc_dma_tag = bus_get_dma_tag(dev);
4376 pci_attach(device_t dev)
4378 int busno, domain, error;
4380 error = pci_attach_common(dev);
4385 * Since there can be multiple independently numbered PCI
4386 * buses on systems with multiple PCI domains, we can't use
4387 * the unit number to decide which bus we are probing. We ask
4388 * the parent pcib what our domain and bus numbers are.
4390 domain = pcib_get_domain(dev);
4391 busno = pcib_get_bus(dev);
4392 pci_add_children(dev, domain, busno);
4393 return (bus_generic_attach(dev));
4397 pci_detach(device_t dev)
4400 struct pci_softc *sc;
4404 error = bus_generic_detach(dev);
4408 sc = device_get_softc(dev);
4409 error = bus_release_resource(dev, PCI_RES_BUS, 0, sc->sc_bus);
4413 return (device_delete_children(dev));
4417 pci_hint_device_unit(device_t dev, device_t child, const char *name, int *unitp)
4421 char me1[24], me2[32];
4425 d = pci_get_domain(child);
4426 b = pci_get_bus(child);
4427 s = pci_get_slot(child);
4428 f = pci_get_function(child);
4429 snprintf(me1, sizeof(me1), "pci%u:%u:%u", b, s, f);
4430 snprintf(me2, sizeof(me2), "pci%u:%u:%u:%u", d, b, s, f);
4432 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) {
4433 resource_string_value(name, unit, "at", &at);
4434 if (strcmp(at, me1) != 0 && strcmp(at, me2) != 0)
4435 continue; /* No match, try next candidate */
4442 pci_set_power_child(device_t dev, device_t child, int state)
4448 * Set the device to the given state. If the firmware suggests
4449 * a different power state, use it instead. If power management
4450 * is not present, the firmware is responsible for managing
4451 * device power. Skip children who aren't attached since they
4452 * are handled separately.
4454 pcib = device_get_parent(dev);
4456 if (device_is_attached(child) &&
4457 PCIB_POWER_FOR_SLEEP(pcib, child, &dstate) == 0)
4458 pci_set_powerstate(child, dstate);
4462 pci_suspend_child(device_t dev, device_t child)
4464 struct pci_devinfo *dinfo;
4465 struct resource_list_entry *rle;
4468 dinfo = device_get_ivars(child);
4471 * Save the PCI configuration space for the child and set the
4472 * device in the appropriate power state for this sleep state.
4474 pci_cfg_save(child, dinfo, 0);
4476 /* Suspend devices before potentially powering them down. */
4477 error = bus_generic_suspend_child(dev, child);
4482 if (pci_do_power_suspend) {
4484 * Make sure this device's interrupt handler is not invoked
4485 * in the case the device uses a shared interrupt that can
4486 * be raised by some other device.
4487 * This is applicable only to regular (legacy) PCI interrupts
4488 * as MSI/MSI-X interrupts are never shared.
4490 rle = resource_list_find(&dinfo->resources,
4492 if (rle != NULL && rle->res != NULL)
4493 (void)bus_suspend_intr(child, rle->res);
4494 pci_set_power_child(dev, child, PCI_POWERSTATE_D3);
4501 pci_resume_child(device_t dev, device_t child)
4503 struct pci_devinfo *dinfo;
4504 struct resource_list_entry *rle;
4506 if (pci_do_power_resume)
4507 pci_set_power_child(dev, child, PCI_POWERSTATE_D0);
4509 dinfo = device_get_ivars(child);
4510 pci_cfg_restore(child, dinfo);
4511 if (!device_is_attached(child))
4512 pci_cfg_save(child, dinfo, 1);
4514 bus_generic_resume_child(dev, child);
4517 * Allow interrupts only after fully resuming the driver and hardware.
4519 if (pci_do_power_suspend) {
4520 /* See pci_suspend_child for details. */
4521 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
4522 if (rle != NULL && rle->res != NULL)
4523 (void)bus_resume_intr(child, rle->res);
4530 pci_resume(device_t dev)
4532 device_t child, *devlist;
4533 int error, i, numdevs;
4535 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0)
4539 * Resume critical devices first, then everything else later.
4541 for (i = 0; i < numdevs; i++) {
4543 switch (pci_get_class(child)) {
4547 case PCIC_BASEPERIPH:
4548 BUS_RESUME_CHILD(dev, child);
4552 for (i = 0; i < numdevs; i++) {
4554 switch (pci_get_class(child)) {
4558 case PCIC_BASEPERIPH:
4561 BUS_RESUME_CHILD(dev, child);
4564 free(devlist, M_TEMP);
4569 pci_load_vendor_data(void)
4575 data = preload_search_by_type("pci_vendor_data");
4577 ptr = preload_fetch_addr(data);
4578 sz = preload_fetch_size(data);
4579 if (ptr != NULL && sz != 0) {
4580 pci_vendordata = ptr;
4581 pci_vendordata_size = sz;
4582 /* terminate the database */
4583 pci_vendordata[pci_vendordata_size] = '\n';
4589 pci_driver_added(device_t dev, driver_t *driver)
4594 struct pci_devinfo *dinfo;
4598 device_printf(dev, "driver added\n");
4599 DEVICE_IDENTIFY(driver, dev);
4600 if (device_get_children(dev, &devlist, &numdevs) != 0)
4602 for (i = 0; i < numdevs; i++) {
4604 if (device_get_state(child) != DS_NOTPRESENT)
4606 dinfo = device_get_ivars(child);
4607 pci_print_verbose(dinfo);
4609 pci_printf(&dinfo->cfg, "reprobing on driver added\n");
4610 pci_cfg_restore(child, dinfo);
4611 if (device_probe_and_attach(child) != 0)
4612 pci_child_detached(dev, child);
4614 free(devlist, M_TEMP);
4618 pci_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
4619 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep)
4621 struct pci_devinfo *dinfo;
4622 struct msix_table_entry *mte;
4623 struct msix_vector *mv;
4629 error = bus_generic_setup_intr(dev, child, irq, flags, filter, intr,
4634 /* If this is not a direct child, just bail out. */
4635 if (device_get_parent(child) != dev) {
4640 rid = rman_get_rid(irq);
4642 /* Make sure that INTx is enabled */
4643 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4646 * Check to see if the interrupt is MSI or MSI-X.
4647 * Ask our parent to map the MSI and give
4648 * us the address and data register values.
4649 * If we fail for some reason, teardown the
4650 * interrupt handler.
4652 dinfo = device_get_ivars(child);
4653 if (dinfo->cfg.msi.msi_alloc > 0) {
4654 if (dinfo->cfg.msi.msi_addr == 0) {
4655 KASSERT(dinfo->cfg.msi.msi_handlers == 0,
4656 ("MSI has handlers, but vectors not mapped"));
4657 error = PCIB_MAP_MSI(device_get_parent(dev),
4658 child, rman_get_start(irq), &addr, &data);
4661 dinfo->cfg.msi.msi_addr = addr;
4662 dinfo->cfg.msi.msi_data = data;
4664 if (dinfo->cfg.msi.msi_handlers == 0)
4665 pci_enable_msi(child, dinfo->cfg.msi.msi_addr,
4666 dinfo->cfg.msi.msi_data);
4667 dinfo->cfg.msi.msi_handlers++;
4669 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4670 ("No MSI or MSI-X interrupts allocated"));
4671 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4672 ("MSI-X index too high"));
4673 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4674 KASSERT(mte->mte_vector != 0, ("no message vector"));
4675 mv = &dinfo->cfg.msix.msix_vectors[mte->mte_vector - 1];
4676 KASSERT(mv->mv_irq == rman_get_start(irq),
4678 if (mv->mv_address == 0) {
4679 KASSERT(mte->mte_handlers == 0,
4680 ("MSI-X table entry has handlers, but vector not mapped"));
4681 error = PCIB_MAP_MSI(device_get_parent(dev),
4682 child, rman_get_start(irq), &addr, &data);
4685 mv->mv_address = addr;
4690 * The MSIX table entry must be made valid by
4691 * incrementing the mte_handlers before
4692 * calling pci_enable_msix() and
4693 * pci_resume_msix(). Else the MSIX rewrite
4694 * table quirk will not work as expected.
4696 mte->mte_handlers++;
4697 if (mte->mte_handlers == 1) {
4698 pci_enable_msix(child, rid - 1, mv->mv_address,
4700 pci_unmask_msix(child, rid - 1);
4705 * Make sure that INTx is disabled if we are using MSI/MSI-X,
4706 * unless the device is affected by PCI_QUIRK_MSI_INTX_BUG,
4707 * in which case we "enable" INTx so MSI/MSI-X actually works.
4709 if (!pci_has_quirk(pci_get_devid(child),
4710 PCI_QUIRK_MSI_INTX_BUG))
4711 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4713 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4716 (void)bus_generic_teardown_intr(dev, child, irq,
4726 pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
4729 struct msix_table_entry *mte;
4730 struct resource_list_entry *rle;
4731 struct pci_devinfo *dinfo;
4734 if (irq == NULL || !(rman_get_flags(irq) & RF_ACTIVE))
4737 /* If this isn't a direct child, just bail out */
4738 if (device_get_parent(child) != dev)
4739 return(bus_generic_teardown_intr(dev, child, irq, cookie));
4741 rid = rman_get_rid(irq);
4744 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4747 * Check to see if the interrupt is MSI or MSI-X. If so,
4748 * decrement the appropriate handlers count and mask the
4749 * MSI-X message, or disable MSI messages if the count
4752 dinfo = device_get_ivars(child);
4753 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, rid);
4754 if (rle->res != irq)
4756 if (dinfo->cfg.msi.msi_alloc > 0) {
4757 KASSERT(rid <= dinfo->cfg.msi.msi_alloc,
4758 ("MSI-X index too high"));
4759 if (dinfo->cfg.msi.msi_handlers == 0)
4761 dinfo->cfg.msi.msi_handlers--;
4762 if (dinfo->cfg.msi.msi_handlers == 0)
4763 pci_disable_msi(child);
4765 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4766 ("No MSI or MSI-X interrupts allocated"));
4767 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4768 ("MSI-X index too high"));
4769 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4770 if (mte->mte_handlers == 0)
4772 mte->mte_handlers--;
4773 if (mte->mte_handlers == 0)
4774 pci_mask_msix(child, rid - 1);
4777 error = bus_generic_teardown_intr(dev, child, irq, cookie);
4780 ("%s: generic teardown failed for MSI/MSI-X", __func__));
4785 pci_print_child(device_t dev, device_t child)
4787 struct pci_devinfo *dinfo;
4788 struct resource_list *rl;
4791 dinfo = device_get_ivars(child);
4792 rl = &dinfo->resources;
4794 retval += bus_print_child_header(dev, child);
4796 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
4797 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
4798 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
4799 if (device_get_flags(dev))
4800 retval += printf(" flags %#x", device_get_flags(dev));
4802 retval += printf(" at device %d.%d", pci_get_slot(child),
4803 pci_get_function(child));
4805 retval += bus_print_child_domain(dev, child);
4806 retval += bus_print_child_footer(dev, child);
4815 int report; /* 0 = bootverbose, 1 = always */
4817 } pci_nomatch_tab[] = {
4818 {PCIC_OLD, -1, 1, "old"},
4819 {PCIC_OLD, PCIS_OLD_NONVGA, 1, "non-VGA display device"},
4820 {PCIC_OLD, PCIS_OLD_VGA, 1, "VGA-compatible display device"},
4821 {PCIC_STORAGE, -1, 1, "mass storage"},
4822 {PCIC_STORAGE, PCIS_STORAGE_SCSI, 1, "SCSI"},
4823 {PCIC_STORAGE, PCIS_STORAGE_IDE, 1, "ATA"},
4824 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, 1, "floppy disk"},
4825 {PCIC_STORAGE, PCIS_STORAGE_IPI, 1, "IPI"},
4826 {PCIC_STORAGE, PCIS_STORAGE_RAID, 1, "RAID"},
4827 {PCIC_STORAGE, PCIS_STORAGE_ATA_ADMA, 1, "ATA (ADMA)"},
4828 {PCIC_STORAGE, PCIS_STORAGE_SATA, 1, "SATA"},
4829 {PCIC_STORAGE, PCIS_STORAGE_SAS, 1, "SAS"},
4830 {PCIC_STORAGE, PCIS_STORAGE_NVM, 1, "NVM"},
4831 {PCIC_NETWORK, -1, 1, "network"},
4832 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, 1, "ethernet"},
4833 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, 1, "token ring"},
4834 {PCIC_NETWORK, PCIS_NETWORK_FDDI, 1, "fddi"},
4835 {PCIC_NETWORK, PCIS_NETWORK_ATM, 1, "ATM"},
4836 {PCIC_NETWORK, PCIS_NETWORK_ISDN, 1, "ISDN"},
4837 {PCIC_DISPLAY, -1, 1, "display"},
4838 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, 1, "VGA"},
4839 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, 1, "XGA"},
4840 {PCIC_DISPLAY, PCIS_DISPLAY_3D, 1, "3D"},
4841 {PCIC_MULTIMEDIA, -1, 1, "multimedia"},
4842 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, 1, "video"},
4843 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, 1, "audio"},
4844 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_TELE, 1, "telephony"},
4845 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_HDA, 1, "HDA"},
4846 {PCIC_MEMORY, -1, 1, "memory"},
4847 {PCIC_MEMORY, PCIS_MEMORY_RAM, 1, "RAM"},
4848 {PCIC_MEMORY, PCIS_MEMORY_FLASH, 1, "flash"},
4849 {PCIC_BRIDGE, -1, 1, "bridge"},
4850 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, 1, "HOST-PCI"},
4851 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, 1, "PCI-ISA"},
4852 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, 1, "PCI-EISA"},
4853 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, 1, "PCI-MCA"},
4854 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, 1, "PCI-PCI"},
4855 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, 1, "PCI-PCMCIA"},
4856 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, 1, "PCI-NuBus"},
4857 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, 1, "PCI-CardBus"},
4858 {PCIC_BRIDGE, PCIS_BRIDGE_RACEWAY, 1, "PCI-RACEway"},
4859 {PCIC_SIMPLECOMM, -1, 1, "simple comms"},
4860 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, 1, "UART"}, /* could detect 16550 */
4861 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, 1, "parallel port"},
4862 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MULSER, 1, "multiport serial"},
4863 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MODEM, 1, "generic modem"},
4864 {PCIC_BASEPERIPH, -1, 0, "base peripheral"},
4865 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, 1, "interrupt controller"},
4866 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, 1, "DMA controller"},
4867 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, 1, "timer"},
4868 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, 1, "realtime clock"},
4869 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PCIHOT, 1, "PCI hot-plug controller"},
4870 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_SDHC, 1, "SD host controller"},
4871 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_IOMMU, 1, "IOMMU"},
4872 {PCIC_INPUTDEV, -1, 1, "input device"},
4873 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, 1, "keyboard"},
4874 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,1, "digitizer"},
4875 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, 1, "mouse"},
4876 {PCIC_INPUTDEV, PCIS_INPUTDEV_SCANNER, 1, "scanner"},
4877 {PCIC_INPUTDEV, PCIS_INPUTDEV_GAMEPORT, 1, "gameport"},
4878 {PCIC_DOCKING, -1, 1, "docking station"},
4879 {PCIC_PROCESSOR, -1, 1, "processor"},
4880 {PCIC_SERIALBUS, -1, 1, "serial bus"},
4881 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, 1, "FireWire"},
4882 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, 1, "AccessBus"},
4883 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, 1, "SSA"},
4884 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, 1, "USB"},
4885 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, 1, "Fibre Channel"},
4886 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, 0, "SMBus"},
4887 {PCIC_WIRELESS, -1, 1, "wireless controller"},
4888 {PCIC_WIRELESS, PCIS_WIRELESS_IRDA, 1, "iRDA"},
4889 {PCIC_WIRELESS, PCIS_WIRELESS_IR, 1, "IR"},
4890 {PCIC_WIRELESS, PCIS_WIRELESS_RF, 1, "RF"},
4891 {PCIC_INTELLIIO, -1, 1, "intelligent I/O controller"},
4892 {PCIC_INTELLIIO, PCIS_INTELLIIO_I2O, 1, "I2O"},
4893 {PCIC_SATCOM, -1, 1, "satellite communication"},
4894 {PCIC_SATCOM, PCIS_SATCOM_TV, 1, "sat TV"},
4895 {PCIC_SATCOM, PCIS_SATCOM_AUDIO, 1, "sat audio"},
4896 {PCIC_SATCOM, PCIS_SATCOM_VOICE, 1, "sat voice"},
4897 {PCIC_SATCOM, PCIS_SATCOM_DATA, 1, "sat data"},
4898 {PCIC_CRYPTO, -1, 1, "encrypt/decrypt"},
4899 {PCIC_CRYPTO, PCIS_CRYPTO_NETCOMP, 1, "network/computer crypto"},
4900 {PCIC_CRYPTO, PCIS_CRYPTO_ENTERTAIN, 1, "entertainment crypto"},
4901 {PCIC_DASP, -1, 0, "dasp"},
4902 {PCIC_DASP, PCIS_DASP_DPIO, 1, "DPIO module"},
4903 {PCIC_DASP, PCIS_DASP_PERFCNTRS, 1, "performance counters"},
4904 {PCIC_DASP, PCIS_DASP_COMM_SYNC, 1, "communication synchronizer"},
4905 {PCIC_DASP, PCIS_DASP_MGMT_CARD, 1, "signal processing management"},
4910 pci_probe_nomatch(device_t dev, device_t child)
4913 const char *cp, *scp;
4917 * Look for a listing for this device in a loaded device database.
4920 if ((device = pci_describe_device(child)) != NULL) {
4921 device_printf(dev, "<%s>", device);
4922 free(device, M_DEVBUF);
4925 * Scan the class/subclass descriptions for a general
4930 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
4931 if (pci_nomatch_tab[i].class == pci_get_class(child)) {
4932 if (pci_nomatch_tab[i].subclass == -1) {
4933 cp = pci_nomatch_tab[i].desc;
4934 report = pci_nomatch_tab[i].report;
4935 } else if (pci_nomatch_tab[i].subclass ==
4936 pci_get_subclass(child)) {
4937 scp = pci_nomatch_tab[i].desc;
4938 report = pci_nomatch_tab[i].report;
4942 if (report || bootverbose) {
4943 device_printf(dev, "<%s%s%s>",
4945 ((cp != NULL) && (scp != NULL)) ? ", " : "",
4949 if (report || bootverbose) {
4950 printf(" at device %d.%d (no driver attached)\n",
4951 pci_get_slot(child), pci_get_function(child));
4953 pci_cfg_save(child, device_get_ivars(child), 1);
4957 pci_child_detached(device_t dev, device_t child)
4959 struct pci_devinfo *dinfo;
4960 struct resource_list *rl;
4962 dinfo = device_get_ivars(child);
4963 rl = &dinfo->resources;
4966 * Have to deallocate IRQs before releasing any MSI messages and
4967 * have to release MSI messages before deallocating any memory
4970 if (resource_list_release_active(rl, dev, child, SYS_RES_IRQ) != 0)
4971 pci_printf(&dinfo->cfg, "Device leaked IRQ resources\n");
4972 if (dinfo->cfg.msi.msi_alloc != 0 || dinfo->cfg.msix.msix_alloc != 0) {
4973 pci_printf(&dinfo->cfg, "Device leaked MSI vectors\n");
4974 (void)pci_release_msi(child);
4976 if (resource_list_release_active(rl, dev, child, SYS_RES_MEMORY) != 0)
4977 pci_printf(&dinfo->cfg, "Device leaked memory resources\n");
4978 if (resource_list_release_active(rl, dev, child, SYS_RES_IOPORT) != 0)
4979 pci_printf(&dinfo->cfg, "Device leaked I/O resources\n");
4981 if (resource_list_release_active(rl, dev, child, PCI_RES_BUS) != 0)
4982 pci_printf(&dinfo->cfg, "Device leaked PCI bus numbers\n");
4985 pci_cfg_save(child, dinfo, 1);
4989 * Parse the PCI device database, if loaded, and return a pointer to a
4990 * description of the device.
4992 * The database is flat text formatted as follows:
4994 * Any line not in a valid format is ignored.
4995 * Lines are terminated with newline '\n' characters.
4997 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then
5000 * A DEVICE line is entered immediately below the corresponding VENDOR ID.
5001 * - devices cannot be listed without a corresponding VENDOR line.
5002 * A DEVICE line consists of a TAB, the 4 digit (hex) device code,
5003 * another TAB, then the device name.
5007 * Assuming (ptr) points to the beginning of a line in the database,
5008 * return the vendor or device and description of the next entry.
5009 * The value of (vendor) or (device) inappropriate for the entry type
5010 * is set to -1. Returns nonzero at the end of the database.
5012 * Note that this is slightly unrobust in the face of corrupt data;
5013 * we attempt to safeguard against this by spamming the end of the
5014 * database with a newline when we initialise.
5017 pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc)
5026 left = pci_vendordata_size - (cp - pci_vendordata);
5034 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2)
5038 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2)
5041 /* skip to next line */
5042 while (*cp != '\n' && left > 0) {
5051 /* skip to next line */
5052 while (*cp != '\n' && left > 0) {
5056 if (*cp == '\n' && left > 0)
5063 pci_describe_device(device_t dev)
5066 char *desc, *vp, *dp, *line;
5068 desc = vp = dp = NULL;
5071 * If we have no vendor data, we can't do anything.
5073 if (pci_vendordata == NULL)
5077 * Scan the vendor data looking for this device
5079 line = pci_vendordata;
5080 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5083 if (pci_describe_parse_line(&line, &vendor, &device, &vp))
5085 if (vendor == pci_get_vendor(dev))
5088 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5091 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) {
5099 if (device == pci_get_device(dev))
5103 snprintf(dp, 80, "0x%x", pci_get_device(dev));
5104 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) !=
5106 sprintf(desc, "%s, %s", vp, dp);
5116 pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
5118 struct pci_devinfo *dinfo;
5121 dinfo = device_get_ivars(child);
5125 case PCI_IVAR_ETHADDR:
5127 * The generic accessor doesn't deal with failure, so
5128 * we set the return value, then return an error.
5130 *((uint8_t **) result) = NULL;
5132 case PCI_IVAR_SUBVENDOR:
5133 *result = cfg->subvendor;
5135 case PCI_IVAR_SUBDEVICE:
5136 *result = cfg->subdevice;
5138 case PCI_IVAR_VENDOR:
5139 *result = cfg->vendor;
5141 case PCI_IVAR_DEVICE:
5142 *result = cfg->device;
5144 case PCI_IVAR_DEVID:
5145 *result = (cfg->device << 16) | cfg->vendor;
5147 case PCI_IVAR_CLASS:
5148 *result = cfg->baseclass;
5150 case PCI_IVAR_SUBCLASS:
5151 *result = cfg->subclass;
5153 case PCI_IVAR_PROGIF:
5154 *result = cfg->progif;
5156 case PCI_IVAR_REVID:
5157 *result = cfg->revid;
5159 case PCI_IVAR_INTPIN:
5160 *result = cfg->intpin;
5163 *result = cfg->intline;
5165 case PCI_IVAR_DOMAIN:
5166 *result = cfg->domain;
5172 *result = cfg->slot;
5174 case PCI_IVAR_FUNCTION:
5175 *result = cfg->func;
5177 case PCI_IVAR_CMDREG:
5178 *result = cfg->cmdreg;
5180 case PCI_IVAR_CACHELNSZ:
5181 *result = cfg->cachelnsz;
5183 case PCI_IVAR_MINGNT:
5184 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5188 *result = cfg->mingnt;
5190 case PCI_IVAR_MAXLAT:
5191 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5195 *result = cfg->maxlat;
5197 case PCI_IVAR_LATTIMER:
5198 *result = cfg->lattimer;
5207 pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
5209 struct pci_devinfo *dinfo;
5211 dinfo = device_get_ivars(child);
5214 case PCI_IVAR_INTPIN:
5215 dinfo->cfg.intpin = value;
5217 case PCI_IVAR_ETHADDR:
5218 case PCI_IVAR_SUBVENDOR:
5219 case PCI_IVAR_SUBDEVICE:
5220 case PCI_IVAR_VENDOR:
5221 case PCI_IVAR_DEVICE:
5222 case PCI_IVAR_DEVID:
5223 case PCI_IVAR_CLASS:
5224 case PCI_IVAR_SUBCLASS:
5225 case PCI_IVAR_PROGIF:
5226 case PCI_IVAR_REVID:
5228 case PCI_IVAR_DOMAIN:
5231 case PCI_IVAR_FUNCTION:
5232 return (EINVAL); /* disallow for now */
5239 #include "opt_ddb.h"
5241 #include <ddb/ddb.h>
5242 #include <sys/cons.h>
5245 * List resources based on pci map registers, used for within ddb
5248 DB_SHOW_COMMAND(pciregs, db_pci_dump)
5250 struct pci_devinfo *dinfo;
5251 struct devlist *devlist_head;
5254 int i, error, none_count;
5257 /* get the head of the device queue */
5258 devlist_head = &pci_devq;
5261 * Go through the list of devices and print out devices
5263 for (error = 0, i = 0,
5264 dinfo = STAILQ_FIRST(devlist_head);
5265 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !db_pager_quit;
5266 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
5268 /* Populate pd_name and pd_unit */
5271 name = device_get_name(dinfo->cfg.dev);
5274 db_printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x "
5275 "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
5276 (name && *name) ? name : "none",
5277 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) :
5279 p->pc_sel.pc_domain, p->pc_sel.pc_bus, p->pc_sel.pc_dev,
5280 p->pc_sel.pc_func, (p->pc_class << 16) |
5281 (p->pc_subclass << 8) | p->pc_progif,
5282 (p->pc_subdevice << 16) | p->pc_subvendor,
5283 (p->pc_device << 16) | p->pc_vendor,
5284 p->pc_revid, p->pc_hdr);
5289 static struct resource *
5290 pci_reserve_map(device_t dev, device_t child, int type, int *rid,
5291 rman_res_t start, rman_res_t end, rman_res_t count, u_int num,
5294 struct pci_devinfo *dinfo = device_get_ivars(child);
5295 struct resource_list *rl = &dinfo->resources;
5296 struct resource *res;
5299 pci_addr_t map, testval;
5304 /* If rid is managed by EA, ignore it */
5305 if (pci_ea_is_enabled(child, *rid))
5308 pm = pci_find_bar(child, *rid);
5310 /* This is a BAR that we failed to allocate earlier. */
5311 mapsize = pm->pm_size;
5315 * Weed out the bogons, and figure out how large the
5316 * BAR/map is. BARs that read back 0 here are bogus
5317 * and unimplemented. Note: atapci in legacy mode are
5318 * special and handled elsewhere in the code. If you
5319 * have a atapci device in legacy mode and it fails
5320 * here, that other code is broken.
5322 pci_read_bar(child, *rid, &map, &testval, NULL);
5325 * Determine the size of the BAR and ignore BARs with a size
5326 * of 0. Device ROM BARs use a different mask value.
5328 if (PCIR_IS_BIOS(&dinfo->cfg, *rid))
5329 mapsize = pci_romsize(testval);
5331 mapsize = pci_mapsize(testval);
5334 pm = pci_add_bar(child, *rid, map, mapsize);
5337 if (PCI_BAR_MEM(map) || PCIR_IS_BIOS(&dinfo->cfg, *rid)) {
5338 if (type != SYS_RES_MEMORY) {
5341 "child %s requested type %d for rid %#x,"
5342 " but the BAR says it is an memio\n",
5343 device_get_nameunit(child), type, *rid);
5347 if (type != SYS_RES_IOPORT) {
5350 "child %s requested type %d for rid %#x,"
5351 " but the BAR says it is an ioport\n",
5352 device_get_nameunit(child), type, *rid);
5358 * For real BARs, we need to override the size that
5359 * the driver requests, because that's what the BAR
5360 * actually uses and we would otherwise have a
5361 * situation where we might allocate the excess to
5362 * another driver, which won't work.
5364 count = ((pci_addr_t)1 << mapsize) * num;
5365 if (RF_ALIGNMENT(flags) < mapsize)
5366 flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize);
5367 if (PCI_BAR_MEM(map) && (map & PCIM_BAR_MEM_PREFETCH))
5368 flags |= RF_PREFETCHABLE;
5371 * Allocate enough resource, and then write back the
5372 * appropriate BAR for that resource.
5374 resource_list_add(rl, type, *rid, start, end, count);
5375 res = resource_list_reserve(rl, dev, child, type, rid, start, end,
5376 count, flags & ~RF_ACTIVE);
5378 resource_list_delete(rl, type, *rid);
5379 device_printf(child,
5380 "%#jx bytes of rid %#x res %d failed (%#jx, %#jx).\n",
5381 count, *rid, type, start, end);
5385 device_printf(child,
5386 "Lazy allocation of %#jx bytes rid %#x type %d at %#jx\n",
5387 count, *rid, type, rman_get_start(res));
5389 /* Disable decoding via the CMD register before updating the BAR */
5390 cmd = pci_read_config(child, PCIR_COMMAND, 2);
5391 pci_write_config(child, PCIR_COMMAND,
5392 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
5394 map = rman_get_start(res);
5395 pci_write_bar(child, pm, map);
5397 /* Restore the original value of the CMD register */
5398 pci_write_config(child, PCIR_COMMAND, cmd, 2);
5404 pci_alloc_multi_resource(device_t dev, device_t child, int type, int *rid,
5405 rman_res_t start, rman_res_t end, rman_res_t count, u_long num,
5408 struct pci_devinfo *dinfo;
5409 struct resource_list *rl;
5410 struct resource_list_entry *rle;
5411 struct resource *res;
5415 * Perform lazy resource allocation
5417 dinfo = device_get_ivars(child);
5418 rl = &dinfo->resources;
5421 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
5423 return (pci_alloc_secbus(dev, child, rid, start, end, count,
5428 * Can't alloc legacy interrupt once MSI messages have
5431 if (*rid == 0 && (cfg->msi.msi_alloc > 0 ||
5432 cfg->msix.msix_alloc > 0))
5436 * If the child device doesn't have an interrupt
5437 * routed and is deserving of an interrupt, try to
5440 if (*rid == 0 && !PCI_INTERRUPT_VALID(cfg->intline) &&
5442 pci_assign_interrupt(dev, child, 0);
5444 case SYS_RES_IOPORT:
5445 case SYS_RES_MEMORY:
5448 * PCI-PCI bridge I/O window resources are not BARs.
5449 * For those allocations just pass the request up the
5452 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE) {
5454 case PCIR_IOBASEL_1:
5455 case PCIR_MEMBASE_1:
5456 case PCIR_PMBASEL_1:
5458 * XXX: Should we bother creating a resource
5461 return (bus_generic_alloc_resource(dev, child,
5462 type, rid, start, end, count, flags));
5466 /* Reserve resources for this BAR if needed. */
5467 rle = resource_list_find(rl, type, *rid);
5469 res = pci_reserve_map(dev, child, type, rid, start, end,
5475 return (resource_list_alloc(rl, dev, child, type, rid,
5476 start, end, count, flags));
5480 pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
5481 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
5484 struct pci_devinfo *dinfo;
5487 if (device_get_parent(child) != dev)
5488 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
5489 type, rid, start, end, count, flags));
5492 dinfo = device_get_ivars(child);
5493 if (dinfo->cfg.flags & PCICFG_VF) {
5495 /* VFs can't have I/O BARs. */
5496 case SYS_RES_IOPORT:
5498 case SYS_RES_MEMORY:
5499 return (pci_vf_alloc_mem_resource(dev, child, rid,
5500 start, end, count, flags));
5503 /* Fall through for other types of resource allocations. */
5507 return (pci_alloc_multi_resource(dev, child, type, rid, start, end,
5512 pci_release_resource(device_t dev, device_t child, int type, int rid,
5515 struct pci_devinfo *dinfo;
5516 struct resource_list *rl;
5519 if (device_get_parent(child) != dev)
5520 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
5523 dinfo = device_get_ivars(child);
5527 if (dinfo->cfg.flags & PCICFG_VF) {
5529 /* VFs can't have I/O BARs. */
5530 case SYS_RES_IOPORT:
5532 case SYS_RES_MEMORY:
5533 return (pci_vf_release_mem_resource(dev, child, rid,
5537 /* Fall through for other types of resource allocations. */
5543 * PCI-PCI bridge I/O window resources are not BARs. For
5544 * those allocations just pass the request up the tree.
5546 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE &&
5547 (type == SYS_RES_IOPORT || type == SYS_RES_MEMORY)) {
5549 case PCIR_IOBASEL_1:
5550 case PCIR_MEMBASE_1:
5551 case PCIR_PMBASEL_1:
5552 return (bus_generic_release_resource(dev, child, type,
5558 rl = &dinfo->resources;
5559 return (resource_list_release(rl, dev, child, type, rid, r));
5563 pci_activate_resource(device_t dev, device_t child, int type, int rid,
5566 struct pci_devinfo *dinfo;
5569 error = bus_generic_activate_resource(dev, child, type, rid, r);
5573 /* Enable decoding in the command register when activating BARs. */
5574 if (device_get_parent(child) == dev) {
5575 /* Device ROMs need their decoding explicitly enabled. */
5576 dinfo = device_get_ivars(child);
5577 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5578 pci_write_bar(child, pci_find_bar(child, rid),
5579 rman_get_start(r) | PCIM_BIOS_ENABLE);
5581 case SYS_RES_IOPORT:
5582 case SYS_RES_MEMORY:
5583 error = PCI_ENABLE_IO(dev, child, type);
5591 pci_deactivate_resource(device_t dev, device_t child, int type,
5592 int rid, struct resource *r)
5594 struct pci_devinfo *dinfo;
5597 error = bus_generic_deactivate_resource(dev, child, type, rid, r);
5601 /* Disable decoding for device ROMs. */
5602 if (device_get_parent(child) == dev) {
5603 dinfo = device_get_ivars(child);
5604 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5605 pci_write_bar(child, pci_find_bar(child, rid),
5612 pci_child_deleted(device_t dev, device_t child)
5614 struct resource_list_entry *rle;
5615 struct resource_list *rl;
5616 struct pci_devinfo *dinfo;
5618 dinfo = device_get_ivars(child);
5619 rl = &dinfo->resources;
5621 EVENTHANDLER_INVOKE(pci_delete_device, child);
5623 /* Turn off access to resources we're about to free */
5624 if (bus_child_present(child) != 0) {
5625 pci_write_config(child, PCIR_COMMAND, pci_read_config(child,
5626 PCIR_COMMAND, 2) & ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2);
5628 pci_disable_busmaster(child);
5631 /* Free all allocated resources */
5632 STAILQ_FOREACH(rle, rl, link) {
5634 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5635 resource_list_busy(rl, rle->type, rle->rid)) {
5636 pci_printf(&dinfo->cfg,
5637 "Resource still owned, oops. "
5638 "(type=%d, rid=%d, addr=%lx)\n",
5639 rle->type, rle->rid,
5640 rman_get_start(rle->res));
5641 bus_release_resource(child, rle->type, rle->rid,
5644 resource_list_unreserve(rl, dev, child, rle->type,
5648 resource_list_free(rl);
5654 pci_delete_resource(device_t dev, device_t child, int type, int rid)
5656 struct pci_devinfo *dinfo;
5657 struct resource_list *rl;
5658 struct resource_list_entry *rle;
5660 if (device_get_parent(child) != dev)
5663 dinfo = device_get_ivars(child);
5664 rl = &dinfo->resources;
5665 rle = resource_list_find(rl, type, rid);
5670 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5671 resource_list_busy(rl, type, rid)) {
5672 device_printf(dev, "delete_resource: "
5673 "Resource still owned by child, oops. "
5674 "(type=%d, rid=%d, addr=%jx)\n",
5675 type, rid, rman_get_start(rle->res));
5678 resource_list_unreserve(rl, dev, child, type, rid);
5680 resource_list_delete(rl, type, rid);
5683 struct resource_list *
5684 pci_get_resource_list (device_t dev, device_t child)
5686 struct pci_devinfo *dinfo = device_get_ivars(child);
5688 return (&dinfo->resources);
5692 pci_get_dma_tag(device_t bus, device_t dev)
5694 struct pci_softc *sc = device_get_softc(bus);
5696 return (sc->sc_dma_tag);
5700 pci_read_config_method(device_t dev, device_t child, int reg, int width)
5702 struct pci_devinfo *dinfo = device_get_ivars(child);
5703 pcicfgregs *cfg = &dinfo->cfg;
5707 * SR-IOV VFs don't implement the VID or DID registers, so we have to
5708 * emulate them here.
5710 if (cfg->flags & PCICFG_VF) {
5711 if (reg == PCIR_VENDOR) {
5714 return (cfg->device << 16 | cfg->vendor);
5716 return (cfg->vendor);
5718 return (cfg->vendor & 0xff);
5720 return (0xffffffff);
5722 } else if (reg == PCIR_DEVICE) {
5724 /* Note that an unaligned 4-byte read is an error. */
5726 return (cfg->device);
5728 return (cfg->device & 0xff);
5730 return (0xffffffff);
5736 return (PCIB_READ_CONFIG(device_get_parent(dev),
5737 cfg->bus, cfg->slot, cfg->func, reg, width));
5741 pci_write_config_method(device_t dev, device_t child, int reg,
5742 uint32_t val, int width)
5744 struct pci_devinfo *dinfo = device_get_ivars(child);
5745 pcicfgregs *cfg = &dinfo->cfg;
5747 PCIB_WRITE_CONFIG(device_get_parent(dev),
5748 cfg->bus, cfg->slot, cfg->func, reg, val, width);
5752 pci_child_location_str_method(device_t dev, device_t child, char *buf,
5756 snprintf(buf, buflen, "slot=%d function=%d dbsf=pci%d:%d:%d:%d",
5757 pci_get_slot(child), pci_get_function(child), pci_get_domain(child),
5758 pci_get_bus(child), pci_get_slot(child), pci_get_function(child));
5763 pci_child_pnpinfo_str_method(device_t dev, device_t child, char *buf,
5766 struct pci_devinfo *dinfo;
5769 dinfo = device_get_ivars(child);
5771 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x "
5772 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device,
5773 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass,
5779 pci_assign_interrupt_method(device_t dev, device_t child)
5781 struct pci_devinfo *dinfo = device_get_ivars(child);
5782 pcicfgregs *cfg = &dinfo->cfg;
5784 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child,
5789 pci_lookup(void *arg, const char *name, device_t *dev)
5793 int domain, bus, slot, func;
5799 * Accept pciconf-style selectors of either pciD:B:S:F or
5800 * pciB:S:F. In the latter case, the domain is assumed to
5803 if (strncmp(name, "pci", 3) != 0)
5805 val = strtol(name + 3, &end, 10);
5806 if (val < 0 || val > INT_MAX || *end != ':')
5809 val = strtol(end + 1, &end, 10);
5810 if (val < 0 || val > INT_MAX || *end != ':')
5813 val = strtol(end + 1, &end, 10);
5814 if (val < 0 || val > INT_MAX)
5818 val = strtol(end + 1, &end, 10);
5819 if (val < 0 || val > INT_MAX || *end != '\0')
5822 } else if (*end == '\0') {
5830 if (domain > PCI_DOMAINMAX || bus > PCI_BUSMAX || slot > PCI_SLOTMAX ||
5831 func > PCIE_ARI_FUNCMAX || (slot != 0 && func > PCI_FUNCMAX))
5834 *dev = pci_find_dbsf(domain, bus, slot, func);
5838 pci_modevent(module_t mod, int what, void *arg)
5840 static struct cdev *pci_cdev;
5841 static eventhandler_tag tag;
5845 STAILQ_INIT(&pci_devq);
5847 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644,
5849 pci_load_vendor_data();
5850 tag = EVENTHANDLER_REGISTER(dev_lookup, pci_lookup, NULL,
5856 EVENTHANDLER_DEREGISTER(dev_lookup, tag);
5857 destroy_dev(pci_cdev);
5865 pci_cfg_restore_pcie(device_t dev, struct pci_devinfo *dinfo)
5867 #define WREG(n, v) pci_write_config(dev, pos + (n), (v), 2)
5868 struct pcicfg_pcie *cfg;
5871 cfg = &dinfo->cfg.pcie;
5872 pos = cfg->pcie_location;
5874 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
5876 WREG(PCIER_DEVICE_CTL, cfg->pcie_device_ctl);
5878 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5879 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
5880 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
5881 WREG(PCIER_LINK_CTL, cfg->pcie_link_ctl);
5883 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5884 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
5885 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
5886 WREG(PCIER_SLOT_CTL, cfg->pcie_slot_ctl);
5888 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5889 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
5890 WREG(PCIER_ROOT_CTL, cfg->pcie_root_ctl);
5893 WREG(PCIER_DEVICE_CTL2, cfg->pcie_device_ctl2);
5894 WREG(PCIER_LINK_CTL2, cfg->pcie_link_ctl2);
5895 WREG(PCIER_SLOT_CTL2, cfg->pcie_slot_ctl2);
5901 pci_cfg_restore_pcix(device_t dev, struct pci_devinfo *dinfo)
5903 pci_write_config(dev, dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND,
5904 dinfo->cfg.pcix.pcix_command, 2);
5908 pci_cfg_restore(device_t dev, struct pci_devinfo *dinfo)
5912 * Restore the device to full power mode. We must do this
5913 * before we restore the registers because moving from D3 to
5914 * D0 will cause the chip's BARs and some other registers to
5915 * be reset to some unknown power on reset values. Cut down
5916 * the noise on boot by doing nothing if we are already in
5919 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0)
5920 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
5921 pci_write_config(dev, PCIR_INTLINE, dinfo->cfg.intline, 1);
5922 pci_write_config(dev, PCIR_INTPIN, dinfo->cfg.intpin, 1);
5923 pci_write_config(dev, PCIR_CACHELNSZ, dinfo->cfg.cachelnsz, 1);
5924 pci_write_config(dev, PCIR_LATTIMER, dinfo->cfg.lattimer, 1);
5925 pci_write_config(dev, PCIR_PROGIF, dinfo->cfg.progif, 1);
5926 pci_write_config(dev, PCIR_REVID, dinfo->cfg.revid, 1);
5927 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
5928 case PCIM_HDRTYPE_NORMAL:
5929 pci_write_config(dev, PCIR_MINGNT, dinfo->cfg.mingnt, 1);
5930 pci_write_config(dev, PCIR_MAXLAT, dinfo->cfg.maxlat, 1);
5932 case PCIM_HDRTYPE_BRIDGE:
5933 pci_write_config(dev, PCIR_SECLAT_1,
5934 dinfo->cfg.bridge.br_seclat, 1);
5935 pci_write_config(dev, PCIR_SUBBUS_1,
5936 dinfo->cfg.bridge.br_subbus, 1);
5937 pci_write_config(dev, PCIR_SECBUS_1,
5938 dinfo->cfg.bridge.br_secbus, 1);
5939 pci_write_config(dev, PCIR_PRIBUS_1,
5940 dinfo->cfg.bridge.br_pribus, 1);
5941 pci_write_config(dev, PCIR_BRIDGECTL_1,
5942 dinfo->cfg.bridge.br_control, 2);
5944 case PCIM_HDRTYPE_CARDBUS:
5945 pci_write_config(dev, PCIR_SECLAT_2,
5946 dinfo->cfg.bridge.br_seclat, 1);
5947 pci_write_config(dev, PCIR_SUBBUS_2,
5948 dinfo->cfg.bridge.br_subbus, 1);
5949 pci_write_config(dev, PCIR_SECBUS_2,
5950 dinfo->cfg.bridge.br_secbus, 1);
5951 pci_write_config(dev, PCIR_PRIBUS_2,
5952 dinfo->cfg.bridge.br_pribus, 1);
5953 pci_write_config(dev, PCIR_BRIDGECTL_2,
5954 dinfo->cfg.bridge.br_control, 2);
5957 pci_restore_bars(dev);
5959 if ((dinfo->cfg.hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_BRIDGE)
5960 pci_write_config(dev, PCIR_COMMAND, dinfo->cfg.cmdreg, 2);
5963 * Restore extended capabilities for PCI-Express and PCI-X
5965 if (dinfo->cfg.pcie.pcie_location != 0)
5966 pci_cfg_restore_pcie(dev, dinfo);
5967 if (dinfo->cfg.pcix.pcix_location != 0)
5968 pci_cfg_restore_pcix(dev, dinfo);
5970 /* Restore MSI and MSI-X configurations if they are present. */
5971 if (dinfo->cfg.msi.msi_location != 0)
5972 pci_resume_msi(dev);
5973 if (dinfo->cfg.msix.msix_location != 0)
5974 pci_resume_msix(dev);
5977 if (dinfo->cfg.iov != NULL)
5978 pci_iov_cfg_restore(dev, dinfo);
5983 pci_cfg_save_pcie(device_t dev, struct pci_devinfo *dinfo)
5985 #define RREG(n) pci_read_config(dev, pos + (n), 2)
5986 struct pcicfg_pcie *cfg;
5989 cfg = &dinfo->cfg.pcie;
5990 pos = cfg->pcie_location;
5992 cfg->pcie_flags = RREG(PCIER_FLAGS);
5994 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
5996 cfg->pcie_device_ctl = RREG(PCIER_DEVICE_CTL);
5998 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5999 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
6000 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
6001 cfg->pcie_link_ctl = RREG(PCIER_LINK_CTL);
6003 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6004 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
6005 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
6006 cfg->pcie_slot_ctl = RREG(PCIER_SLOT_CTL);
6008 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6009 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
6010 cfg->pcie_root_ctl = RREG(PCIER_ROOT_CTL);
6013 cfg->pcie_device_ctl2 = RREG(PCIER_DEVICE_CTL2);
6014 cfg->pcie_link_ctl2 = RREG(PCIER_LINK_CTL2);
6015 cfg->pcie_slot_ctl2 = RREG(PCIER_SLOT_CTL2);
6021 pci_cfg_save_pcix(device_t dev, struct pci_devinfo *dinfo)
6023 dinfo->cfg.pcix.pcix_command = pci_read_config(dev,
6024 dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND, 2);
6028 pci_cfg_save(device_t dev, struct pci_devinfo *dinfo, int setstate)
6034 * Some drivers apparently write to these registers w/o updating our
6035 * cached copy. No harm happens if we update the copy, so do so here
6036 * so we can restore them. The COMMAND register is modified by the
6037 * bus w/o updating the cache. This should represent the normally
6038 * writable portion of the 'defined' part of type 0/1/2 headers.
6040 dinfo->cfg.vendor = pci_read_config(dev, PCIR_VENDOR, 2);
6041 dinfo->cfg.device = pci_read_config(dev, PCIR_DEVICE, 2);
6042 dinfo->cfg.cmdreg = pci_read_config(dev, PCIR_COMMAND, 2);
6043 dinfo->cfg.intline = pci_read_config(dev, PCIR_INTLINE, 1);
6044 dinfo->cfg.intpin = pci_read_config(dev, PCIR_INTPIN, 1);
6045 dinfo->cfg.cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
6046 dinfo->cfg.lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
6047 dinfo->cfg.baseclass = pci_read_config(dev, PCIR_CLASS, 1);
6048 dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1);
6049 dinfo->cfg.progif = pci_read_config(dev, PCIR_PROGIF, 1);
6050 dinfo->cfg.revid = pci_read_config(dev, PCIR_REVID, 1);
6051 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
6052 case PCIM_HDRTYPE_NORMAL:
6053 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_0, 2);
6054 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_0, 2);
6055 dinfo->cfg.mingnt = pci_read_config(dev, PCIR_MINGNT, 1);
6056 dinfo->cfg.maxlat = pci_read_config(dev, PCIR_MAXLAT, 1);
6058 case PCIM_HDRTYPE_BRIDGE:
6059 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6061 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6063 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6065 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6067 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6068 PCIR_BRIDGECTL_1, 2);
6070 case PCIM_HDRTYPE_CARDBUS:
6071 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6073 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6075 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6077 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6079 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6080 PCIR_BRIDGECTL_2, 2);
6081 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_2, 2);
6082 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_2, 2);
6086 if (dinfo->cfg.pcie.pcie_location != 0)
6087 pci_cfg_save_pcie(dev, dinfo);
6089 if (dinfo->cfg.pcix.pcix_location != 0)
6090 pci_cfg_save_pcix(dev, dinfo);
6093 if (dinfo->cfg.iov != NULL)
6094 pci_iov_cfg_save(dev, dinfo);
6098 * don't set the state for display devices, base peripherals and
6099 * memory devices since bad things happen when they are powered down.
6100 * We should (a) have drivers that can easily detach and (b) use
6101 * generic drivers for these devices so that some device actually
6102 * attaches. We need to make sure that when we implement (a) we don't
6103 * power the device down on a reattach.
6105 cls = pci_get_class(dev);
6108 switch (pci_do_power_nodriver)
6110 case 0: /* NO powerdown at all */
6112 case 1: /* Conservative about what to power down */
6113 if (cls == PCIC_STORAGE)
6116 case 2: /* Aggressive about what to power down */
6117 if (cls == PCIC_DISPLAY || cls == PCIC_MEMORY ||
6118 cls == PCIC_BASEPERIPH)
6121 case 3: /* Power down everything */
6125 * PCI spec says we can only go into D3 state from D0 state.
6126 * Transition from D[12] into D0 before going to D3 state.
6128 ps = pci_get_powerstate(dev);
6129 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6130 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6131 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3)
6132 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6135 /* Wrapper APIs suitable for device driver use. */
6137 pci_save_state(device_t dev)
6139 struct pci_devinfo *dinfo;
6141 dinfo = device_get_ivars(dev);
6142 pci_cfg_save(dev, dinfo, 0);
6146 pci_restore_state(device_t dev)
6148 struct pci_devinfo *dinfo;
6150 dinfo = device_get_ivars(dev);
6151 pci_cfg_restore(dev, dinfo);
6155 pci_get_id_method(device_t dev, device_t child, enum pci_id_type type,
6159 return (PCIB_GET_ID(device_get_parent(dev), child, type, id));
6162 /* Find the upstream port of a given PCI device in a root complex. */
6164 pci_find_pcie_root_port(device_t dev)
6166 struct pci_devinfo *dinfo;
6167 devclass_t pci_class;
6170 pci_class = devclass_find("pci");
6171 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class,
6172 ("%s: non-pci device %s", __func__, device_get_nameunit(dev)));
6175 * Walk the bridge hierarchy until we find a PCI-e root
6176 * port or a non-PCI device.
6179 bus = device_get_parent(dev);
6180 KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
6181 device_get_nameunit(dev)));
6183 pcib = device_get_parent(bus);
6184 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
6185 device_get_nameunit(bus)));
6188 * pcib's parent must be a PCI bus for this to be a
6191 if (device_get_devclass(device_get_parent(pcib)) != pci_class)
6194 dinfo = device_get_ivars(pcib);
6195 if (dinfo->cfg.pcie.pcie_location != 0 &&
6196 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT)
6204 * Wait for pending transactions to complete on a PCI-express function.
6206 * The maximum delay is specified in milliseconds in max_delay. Note
6207 * that this function may sleep.
6209 * Returns true if the function is idle and false if the timeout is
6210 * exceeded. If dev is not a PCI-express function, this returns true.
6213 pcie_wait_for_pending_transactions(device_t dev, u_int max_delay)
6215 struct pci_devinfo *dinfo = device_get_ivars(dev);
6219 cap = dinfo->cfg.pcie.pcie_location;
6223 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6224 while (sta & PCIEM_STA_TRANSACTION_PND) {
6228 /* Poll once every 100 milliseconds up to the timeout. */
6229 if (max_delay > 100) {
6230 pause_sbt("pcietp", 100 * SBT_1MS, 0, C_HARDCLOCK);
6233 pause_sbt("pcietp", max_delay * SBT_1MS, 0,
6237 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6244 * Determine the maximum Completion Timeout in microseconds.
6246 * For non-PCI-express functions this returns 0.
6249 pcie_get_max_completion_timeout(device_t dev)
6251 struct pci_devinfo *dinfo = device_get_ivars(dev);
6254 cap = dinfo->cfg.pcie.pcie_location;
6259 * Functions using the 1.x spec use the default timeout range of
6260 * 50 microseconds to 50 milliseconds. Functions that do not
6261 * support programmable timeouts also use this range.
6263 if ((dinfo->cfg.pcie.pcie_flags & PCIEM_FLAGS_VERSION) < 2 ||
6264 (pci_read_config(dev, cap + PCIER_DEVICE_CAP2, 4) &
6265 PCIEM_CAP2_COMP_TIMO_RANGES) == 0)
6268 switch (pci_read_config(dev, cap + PCIER_DEVICE_CTL2, 2) &
6269 PCIEM_CTL2_COMP_TIMO_VAL) {
6270 case PCIEM_CTL2_COMP_TIMO_100US:
6272 case PCIEM_CTL2_COMP_TIMO_10MS:
6274 case PCIEM_CTL2_COMP_TIMO_55MS:
6276 case PCIEM_CTL2_COMP_TIMO_210MS:
6277 return (210 * 1000);
6278 case PCIEM_CTL2_COMP_TIMO_900MS:
6279 return (900 * 1000);
6280 case PCIEM_CTL2_COMP_TIMO_3500MS:
6281 return (3500 * 1000);
6282 case PCIEM_CTL2_COMP_TIMO_13S:
6283 return (13 * 1000 * 1000);
6284 case PCIEM_CTL2_COMP_TIMO_64S:
6285 return (64 * 1000 * 1000);
6292 pcie_apei_error(device_t dev, int sev, uint8_t *aerp)
6294 struct pci_devinfo *dinfo = device_get_ivars(dev);
6300 if (sev == PCIEM_STA_CORRECTABLE_ERROR)
6302 else if (sev == PCIEM_STA_NON_FATAL_ERROR)
6303 s = "Uncorrectable (Non-Fatal)";
6305 s = "Uncorrectable (Fatal)";
6306 device_printf(dev, "%s PCIe error reported by APEI\n", s);
6308 if (sev == PCIEM_STA_CORRECTABLE_ERROR) {
6309 r = le32dec(aerp + PCIR_AER_COR_STATUS);
6310 r1 = le32dec(aerp + PCIR_AER_COR_MASK);
6312 r = le32dec(aerp + PCIR_AER_UC_STATUS);
6313 r1 = le32dec(aerp + PCIR_AER_UC_MASK);
6315 device_printf(dev, "status 0x%08x mask 0x%08x", r, r1);
6316 if (sev != PCIEM_STA_CORRECTABLE_ERROR) {
6317 r = le32dec(aerp + PCIR_AER_UC_SEVERITY);
6318 rs = le16dec(aerp + PCIR_AER_CAP_CONTROL);
6319 printf(" severity 0x%08x first %d\n",
6325 /* As kind of recovery just report and clear the error statuses. */
6326 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
6327 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6329 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
6330 device_printf(dev, "Clearing UC AER errors 0x%08x\n", r);
6333 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6335 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
6336 device_printf(dev, "Clearing COR AER errors 0x%08x\n", r);
6339 if (dinfo->cfg.pcie.pcie_location != 0) {
6340 rs = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
6341 PCIER_DEVICE_STA, 2);
6342 if ((rs & (PCIEM_STA_CORRECTABLE_ERROR |
6343 PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
6344 PCIEM_STA_UNSUPPORTED_REQ)) != 0) {
6345 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
6346 PCIER_DEVICE_STA, rs, 2);
6347 device_printf(dev, "Clearing PCIe errors 0x%04x\n", rs);
6353 * Perform a Function Level Reset (FLR) on a device.
6355 * This function first waits for any pending transactions to complete
6356 * within the timeout specified by max_delay. If transactions are
6357 * still pending, the function will return false without attempting a
6360 * If dev is not a PCI-express function or does not support FLR, this
6361 * function returns false.
6363 * Note that no registers are saved or restored. The caller is
6364 * responsible for saving and restoring any registers including
6365 * PCI-standard registers via pci_save_state() and
6366 * pci_restore_state().
6369 pcie_flr(device_t dev, u_int max_delay, bool force)
6371 struct pci_devinfo *dinfo = device_get_ivars(dev);
6376 cap = dinfo->cfg.pcie.pcie_location;
6380 if (!(pci_read_config(dev, cap + PCIER_DEVICE_CAP, 4) & PCIEM_CAP_FLR))
6384 * Disable busmastering to prevent generation of new
6385 * transactions while waiting for the device to go idle. If
6386 * the idle timeout fails, the command register is restored
6387 * which will re-enable busmastering.
6389 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
6390 pci_write_config(dev, PCIR_COMMAND, cmd & ~(PCIM_CMD_BUSMASTEREN), 2);
6391 if (!pcie_wait_for_pending_transactions(dev, max_delay)) {
6393 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
6396 pci_printf(&dinfo->cfg,
6397 "Resetting with transactions pending after %d ms\n",
6401 * Extend the post-FLR delay to cover the maximum
6402 * Completion Timeout delay of anything in flight
6403 * during the FLR delay. Enforce a minimum delay of
6406 compl_delay = pcie_get_max_completion_timeout(dev) / 1000;
6407 if (compl_delay < 10)
6412 /* Initiate the reset. */
6413 ctl = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
6414 pci_write_config(dev, cap + PCIER_DEVICE_CTL, ctl |
6415 PCIEM_CTL_INITIATE_FLR, 2);
6417 /* Wait for 100ms. */
6418 pause_sbt("pcieflr", (100 + compl_delay) * SBT_1MS, 0, C_HARDCLOCK);
6420 if (pci_read_config(dev, cap + PCIER_DEVICE_STA, 2) &
6421 PCIEM_STA_TRANSACTION_PND)
6422 pci_printf(&dinfo->cfg, "Transactions pending after FLR!\n");
6427 * Attempt a power-management reset by cycling the device in/out of D3
6428 * state. PCI spec says we can only go into D3 state from D0 state.
6429 * Transition from D[12] into D0 before going to D3 state.
6432 pci_power_reset(device_t dev)
6436 ps = pci_get_powerstate(dev);
6437 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6438 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6439 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6440 pci_set_powerstate(dev, ps);
6445 * Try link drop and retrain of the downstream port of upstream
6446 * switch, for PCIe. According to the PCIe 3.0 spec 6.6.1, this must
6447 * cause Conventional Hot reset of the device in the slot.
6448 * Alternative, for PCIe, could be the secondary bus reset initiatied
6449 * on the upstream switch PCIR_BRIDGECTL_1, bit 6.
6452 pcie_link_reset(device_t port, int pcie_location)
6456 v = pci_read_config(port, pcie_location + PCIER_LINK_CTL, 2);
6457 v |= PCIEM_LINK_CTL_LINK_DIS;
6458 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6459 pause_sbt("pcier1", mstosbt(20), 0, 0);
6460 v &= ~PCIEM_LINK_CTL_LINK_DIS;
6461 v |= PCIEM_LINK_CTL_RETRAIN_LINK;
6462 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6463 pause_sbt("pcier2", mstosbt(100), 0, 0); /* 100 ms */
6464 v = pci_read_config(port, pcie_location + PCIER_LINK_STA, 2);
6465 return ((v & PCIEM_LINK_STA_TRAINING) != 0 ? ETIMEDOUT : 0);
6469 pci_reset_post(device_t dev, device_t child)
6472 if (dev == device_get_parent(child))
6473 pci_restore_state(child);
6478 pci_reset_prepare(device_t dev, device_t child)
6481 if (dev == device_get_parent(child))
6482 pci_save_state(child);
6487 pci_reset_child(device_t dev, device_t child, int flags)
6491 if (dev == NULL || device_get_parent(child) != dev)
6493 if ((flags & DEVF_RESET_DETACH) != 0) {
6494 error = device_get_state(child) == DS_ATTACHED ?
6495 device_detach(child) : 0;
6497 error = BUS_SUSPEND_CHILD(dev, child);
6500 if (!pcie_flr(child, 1000, false)) {
6501 error = BUS_RESET_PREPARE(dev, child);
6503 pci_power_reset(child);
6504 BUS_RESET_POST(dev, child);
6506 if ((flags & DEVF_RESET_DETACH) != 0)
6507 device_probe_and_attach(child);
6509 BUS_RESUME_CHILD(dev, child);
6514 const struct pci_device_table *
6515 pci_match_device(device_t child, const struct pci_device_table *id, size_t nelt)
6518 uint16_t vendor, device, subvendor, subdevice, class, subclass, revid;
6520 vendor = pci_get_vendor(child);
6521 device = pci_get_device(child);
6522 subvendor = pci_get_subvendor(child);
6523 subdevice = pci_get_subdevice(child);
6524 class = pci_get_class(child);
6525 subclass = pci_get_subclass(child);
6526 revid = pci_get_revid(child);
6527 while (nelt-- > 0) {
6529 if (id->match_flag_vendor)
6530 match &= vendor == id->vendor;
6531 if (id->match_flag_device)
6532 match &= device == id->device;
6533 if (id->match_flag_subvendor)
6534 match &= subvendor == id->subvendor;
6535 if (id->match_flag_subdevice)
6536 match &= subdevice == id->subdevice;
6537 if (id->match_flag_class)
6538 match &= class == id->class_id;
6539 if (id->match_flag_subclass)
6540 match &= subclass == id->subclass;
6541 if (id->match_flag_revid)
6542 match &= revid == id->revid;
6551 pci_print_faulted_dev_name(const struct pci_devinfo *dinfo)
6553 const char *dev_name;
6556 dev = dinfo->cfg.dev;
6557 printf("pci%d:%d:%d:%d", dinfo->cfg.domain, dinfo->cfg.bus,
6558 dinfo->cfg.slot, dinfo->cfg.func);
6559 dev_name = device_get_name(dev);
6560 if (dev_name != NULL)
6561 printf(" (%s%d)", dev_name, device_get_unit(dev));
6565 pci_print_faulted_dev(void)
6567 struct pci_devinfo *dinfo;
6573 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6574 dev = dinfo->cfg.dev;
6575 status = pci_read_config(dev, PCIR_STATUS, 2);
6576 status &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6577 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6578 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6580 pci_print_faulted_dev_name(dinfo);
6581 printf(" error 0x%04x\n", status);
6583 if (dinfo->cfg.pcie.pcie_location != 0) {
6584 status = pci_read_config(dev,
6585 dinfo->cfg.pcie.pcie_location +
6586 PCIER_DEVICE_STA, 2);
6587 if ((status & (PCIEM_STA_CORRECTABLE_ERROR |
6588 PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
6589 PCIEM_STA_UNSUPPORTED_REQ)) != 0) {
6590 pci_print_faulted_dev_name(dinfo);
6591 printf(" PCIe DEVCTL 0x%04x DEVSTA 0x%04x\n",
6592 pci_read_config(dev,
6593 dinfo->cfg.pcie.pcie_location +
6594 PCIER_DEVICE_CTL, 2),
6598 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
6599 r1 = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6600 r2 = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6601 if (r1 != 0 || r2 != 0) {
6602 pci_print_faulted_dev_name(dinfo);
6603 printf(" AER UC 0x%08x Mask 0x%08x Svr 0x%08x\n"
6604 " COR 0x%08x Mask 0x%08x Ctl 0x%08x\n",
6605 r1, pci_read_config(dev, aer +
6606 PCIR_AER_UC_MASK, 4),
6607 pci_read_config(dev, aer +
6608 PCIR_AER_UC_SEVERITY, 4),
6609 r2, pci_read_config(dev, aer +
6610 PCIR_AER_COR_MASK, 4),
6611 pci_read_config(dev, aer +
6612 PCIR_AER_CAP_CONTROL, 4));
6613 for (i = 0; i < 4; i++) {
6614 r1 = pci_read_config(dev, aer +
6615 PCIR_AER_HEADER_LOG + i * 4, 4);
6616 printf(" HL%d: 0x%08x\n", i, r1);
6624 DB_SHOW_COMMAND(pcierr, pci_print_faulted_dev_db)
6627 pci_print_faulted_dev();
6631 db_clear_pcie_errors(const struct pci_devinfo *dinfo)
6637 dev = dinfo->cfg.dev;
6638 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
6639 PCIER_DEVICE_STA, 2);
6640 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
6641 PCIER_DEVICE_STA, r, 2);
6643 if (pci_find_extcap(dev, PCIZ_AER, &aer) != 0)
6645 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6647 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
6648 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6650 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
6653 DB_COMMAND(pci_clearerr, db_pci_clearerr)
6655 struct pci_devinfo *dinfo;
6657 uint16_t status, status1;
6659 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6660 dev = dinfo->cfg.dev;
6661 status1 = status = pci_read_config(dev, PCIR_STATUS, 2);
6662 status1 &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6663 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6664 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6667 pci_write_config(dev, PCIR_STATUS, status, 2);
6669 if (dinfo->cfg.pcie.pcie_location != 0)
6670 db_clear_pcie_errors(dinfo);