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("$FreeBSD$");
35 #include "opt_iommu.h"
38 #include <sys/param.h>
40 #include <sys/endian.h>
41 #include <sys/eventhandler.h>
42 #include <sys/fcntl.h>
43 #include <sys/kernel.h>
44 #include <sys/limits.h>
45 #include <sys/linker.h>
46 #include <sys/malloc.h>
47 #include <sys/module.h>
48 #include <sys/queue.h>
49 #include <sys/sysctl.h>
50 #include <sys/systm.h>
51 #include <sys/taskqueue.h>
56 #include <vm/vm_extern.h>
59 #include <machine/bus.h>
61 #include <machine/resource.h>
62 #include <machine/stdarg.h>
64 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
65 #include <machine/intr_machdep.h>
68 #include <sys/pciio.h>
69 #include <dev/pci/pcireg.h>
70 #include <dev/pci/pcivar.h>
71 #include <dev/pci/pci_private.h>
75 #include <dev/pci/pci_iov_private.h>
78 #include <dev/usb/controller/xhcireg.h>
79 #include <dev/usb/controller/ehcireg.h>
80 #include <dev/usb/controller/ohcireg.h>
81 #include <dev/usb/controller/uhcireg.h>
83 #include <dev/iommu/iommu.h>
88 #define PCIR_IS_BIOS(cfg, reg) \
89 (((cfg)->hdrtype == PCIM_HDRTYPE_NORMAL && reg == PCIR_BIOS) || \
90 ((cfg)->hdrtype == PCIM_HDRTYPE_BRIDGE && reg == PCIR_BIOS_1))
92 static int pci_has_quirk(uint32_t devid, int quirk);
93 static pci_addr_t pci_mapbase(uint64_t mapreg);
94 static const char *pci_maptype(uint64_t mapreg);
95 static int pci_maprange(uint64_t mapreg);
96 static pci_addr_t pci_rombase(uint64_t mapreg);
97 static int pci_romsize(uint64_t testval);
98 static void pci_fixancient(pcicfgregs *cfg);
99 static int pci_printf(pcicfgregs *cfg, const char *fmt, ...);
101 static int pci_porten(device_t dev);
102 static int pci_memen(device_t dev);
103 static void pci_assign_interrupt(device_t bus, device_t dev,
105 static int pci_add_map(device_t bus, device_t dev, int reg,
106 struct resource_list *rl, int force, int prefetch);
107 static int pci_probe(device_t dev);
108 static void pci_load_vendor_data(void);
109 static int pci_describe_parse_line(char **ptr, int *vendor,
110 int *device, char **desc);
111 static char *pci_describe_device(device_t dev);
112 static int pci_modevent(module_t mod, int what, void *arg);
113 static void pci_hdrtypedata(device_t pcib, int b, int s, int f,
115 static void pci_read_cap(device_t pcib, pcicfgregs *cfg);
116 static int pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg,
117 int reg, uint32_t *data);
119 static int pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg,
120 int reg, uint32_t data);
122 static void pci_read_vpd(device_t pcib, pcicfgregs *cfg);
123 static void pci_mask_msix(device_t dev, u_int index);
124 static void pci_unmask_msix(device_t dev, u_int index);
125 static int pci_msi_blacklisted(void);
126 static int pci_msix_blacklisted(void);
127 static void pci_resume_msi(device_t dev);
128 static void pci_resume_msix(device_t dev);
129 static int pci_remap_intr_method(device_t bus, device_t dev,
131 static void pci_hint_device_unit(device_t acdev, device_t child,
132 const char *name, int *unitp);
133 static int pci_reset_post(device_t dev, device_t child);
134 static int pci_reset_prepare(device_t dev, device_t child);
135 static int pci_reset_child(device_t dev, device_t child,
138 static int pci_get_id_method(device_t dev, device_t child,
139 enum pci_id_type type, uintptr_t *rid);
141 static struct pci_devinfo * pci_fill_devinfo(device_t pcib, device_t bus, int d,
142 int b, int s, int f, uint16_t vid, uint16_t did);
144 static device_method_t pci_methods[] = {
145 /* Device interface */
146 DEVMETHOD(device_probe, pci_probe),
147 DEVMETHOD(device_attach, pci_attach),
148 DEVMETHOD(device_detach, pci_detach),
149 DEVMETHOD(device_shutdown, bus_generic_shutdown),
150 DEVMETHOD(device_suspend, bus_generic_suspend),
151 DEVMETHOD(device_resume, pci_resume),
154 DEVMETHOD(bus_print_child, pci_print_child),
155 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
156 DEVMETHOD(bus_read_ivar, pci_read_ivar),
157 DEVMETHOD(bus_write_ivar, pci_write_ivar),
158 DEVMETHOD(bus_driver_added, pci_driver_added),
159 DEVMETHOD(bus_setup_intr, pci_setup_intr),
160 DEVMETHOD(bus_teardown_intr, pci_teardown_intr),
161 DEVMETHOD(bus_reset_prepare, pci_reset_prepare),
162 DEVMETHOD(bus_reset_post, pci_reset_post),
163 DEVMETHOD(bus_reset_child, pci_reset_child),
165 DEVMETHOD(bus_get_dma_tag, pci_get_dma_tag),
166 DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
167 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
168 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
169 DEVMETHOD(bus_delete_resource, pci_delete_resource),
170 DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
171 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
172 DEVMETHOD(bus_release_resource, pci_release_resource),
173 DEVMETHOD(bus_activate_resource, pci_activate_resource),
174 DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource),
175 DEVMETHOD(bus_child_deleted, pci_child_deleted),
176 DEVMETHOD(bus_child_detached, pci_child_detached),
177 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
178 DEVMETHOD(bus_child_location_str, pci_child_location_str_method),
179 DEVMETHOD(bus_hint_device_unit, pci_hint_device_unit),
180 DEVMETHOD(bus_remap_intr, pci_remap_intr_method),
181 DEVMETHOD(bus_suspend_child, pci_suspend_child),
182 DEVMETHOD(bus_resume_child, pci_resume_child),
183 DEVMETHOD(bus_rescan, pci_rescan_method),
186 DEVMETHOD(pci_read_config, pci_read_config_method),
187 DEVMETHOD(pci_write_config, pci_write_config_method),
188 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
189 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
190 DEVMETHOD(pci_enable_io, pci_enable_io_method),
191 DEVMETHOD(pci_disable_io, pci_disable_io_method),
192 DEVMETHOD(pci_get_vpd_ident, pci_get_vpd_ident_method),
193 DEVMETHOD(pci_get_vpd_readonly, pci_get_vpd_readonly_method),
194 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
195 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
196 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
197 DEVMETHOD(pci_find_cap, pci_find_cap_method),
198 DEVMETHOD(pci_find_next_cap, pci_find_next_cap_method),
199 DEVMETHOD(pci_find_extcap, pci_find_extcap_method),
200 DEVMETHOD(pci_find_next_extcap, pci_find_next_extcap_method),
201 DEVMETHOD(pci_find_htcap, pci_find_htcap_method),
202 DEVMETHOD(pci_find_next_htcap, pci_find_next_htcap_method),
203 DEVMETHOD(pci_alloc_msi, pci_alloc_msi_method),
204 DEVMETHOD(pci_alloc_msix, pci_alloc_msix_method),
205 DEVMETHOD(pci_enable_msi, pci_enable_msi_method),
206 DEVMETHOD(pci_enable_msix, pci_enable_msix_method),
207 DEVMETHOD(pci_disable_msi, pci_disable_msi_method),
208 DEVMETHOD(pci_remap_msix, pci_remap_msix_method),
209 DEVMETHOD(pci_release_msi, pci_release_msi_method),
210 DEVMETHOD(pci_msi_count, pci_msi_count_method),
211 DEVMETHOD(pci_msix_count, pci_msix_count_method),
212 DEVMETHOD(pci_msix_pba_bar, pci_msix_pba_bar_method),
213 DEVMETHOD(pci_msix_table_bar, pci_msix_table_bar_method),
214 DEVMETHOD(pci_get_id, pci_get_id_method),
215 DEVMETHOD(pci_alloc_devinfo, pci_alloc_devinfo_method),
216 DEVMETHOD(pci_child_added, pci_child_added_method),
218 DEVMETHOD(pci_iov_attach, pci_iov_attach_method),
219 DEVMETHOD(pci_iov_detach, pci_iov_detach_method),
220 DEVMETHOD(pci_create_iov_child, pci_create_iov_child_method),
226 DEFINE_CLASS_0(pci, pci_driver, pci_methods, sizeof(struct pci_softc));
228 static devclass_t pci_devclass;
229 EARLY_DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, NULL,
231 MODULE_VERSION(pci, 1);
233 static char *pci_vendordata;
234 static size_t pci_vendordata_size;
237 uint32_t devid; /* Vendor/device of the card */
239 #define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */
240 #define PCI_QUIRK_DISABLE_MSI 2 /* Neither MSI nor MSI-X work */
241 #define PCI_QUIRK_ENABLE_MSI_VM 3 /* Older chipset in VM where MSI works */
242 #define PCI_QUIRK_UNMAP_REG 4 /* Ignore PCI map register */
243 #define PCI_QUIRK_DISABLE_MSIX 5 /* MSI-X doesn't work */
244 #define PCI_QUIRK_MSI_INTX_BUG 6 /* PCIM_CMD_INTxDIS disables MSI */
245 #define PCI_QUIRK_REALLOC_BAR 7 /* Can't allocate memory at the default address */
250 static const struct pci_quirk pci_quirks[] = {
251 /* The Intel 82371AB and 82443MX have a map register at offset 0x90. */
252 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 },
253 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 },
254 /* As does the Serverworks OSB4 (the SMBus mapping register) */
255 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 },
258 * MSI doesn't work with the ServerWorks CNB20-HE Host Bridge
259 * or the CMIC-SL (AKA ServerWorks GC_LE).
261 { 0x00141166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
262 { 0x00171166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
265 * MSI doesn't work on earlier Intel chipsets including
266 * E7500, E7501, E7505, 845, 865, 875/E7210, and 855.
268 { 0x25408086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
269 { 0x254c8086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
270 { 0x25508086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
271 { 0x25608086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
272 { 0x25708086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
273 { 0x25788086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
274 { 0x35808086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
277 * MSI doesn't work with devices behind the AMD 8131 HT-PCIX
280 { 0x74501022, PCI_QUIRK_DISABLE_MSI, 0, 0 },
283 * Some virtualization environments emulate an older chipset
284 * but support MSI just fine. QEMU uses the Intel 82440.
286 { 0x12378086, PCI_QUIRK_ENABLE_MSI_VM, 0, 0 },
289 * HPET MMIO base address may appear in Bar1 for AMD SB600 SMBus
290 * controller depending on SoftPciRst register (PM_IO 0x55 [7]).
291 * It prevents us from attaching hpet(4) when the bit is unset.
292 * Note this quirk only affects SB600 revision A13 and earlier.
293 * For SB600 A21 and later, firmware must set the bit to hide it.
294 * For SB700 and later, it is unused and hardcoded to zero.
296 { 0x43851002, PCI_QUIRK_UNMAP_REG, 0x14, 0 },
299 * Atheros AR8161/AR8162/E2200/E2400/E2500 Ethernet controllers have
300 * a bug that MSI interrupt does not assert if PCIM_CMD_INTxDIS bit
301 * of the command register is set.
303 { 0x10911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
304 { 0xE0911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
305 { 0xE0A11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
306 { 0xE0B11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
307 { 0x10901969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
310 * Broadcom BCM5714(S)/BCM5715(S)/BCM5780(S) Ethernet MACs don't
311 * issue MSI interrupts with PCIM_CMD_INTxDIS set either.
313 { 0x166814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714 */
314 { 0x166914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714S */
315 { 0x166a14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780 */
316 { 0x166b14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780S */
317 { 0x167814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715 */
318 { 0x167914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715S */
321 * HPE Gen 10 VGA has a memory range that can't be allocated in the
324 { 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 | CTLFLAG_MPSAFE, 0,
340 "PCI bus tuning parameters");
342 static int pci_enable_io_modes = 1;
343 SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RWTUN,
344 &pci_enable_io_modes, 1,
345 "Enable I/O and memory bits in the config register. Some BIOSes do not"
346 " enable these bits correctly. We'd like to do this all the time, but"
347 " there are some peripherals that this causes problems with.");
349 static int pci_do_realloc_bars = 1;
350 SYSCTL_INT(_hw_pci, OID_AUTO, realloc_bars, CTLFLAG_RWTUN,
351 &pci_do_realloc_bars, 0,
352 "Attempt to allocate a new range for any BARs whose original "
353 "firmware-assigned ranges fail to allocate during the initial device scan.");
355 static int pci_do_power_nodriver = 0;
356 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_nodriver, CTLFLAG_RWTUN,
357 &pci_do_power_nodriver, 0,
358 "Place a function into D3 state when no driver attaches to it. 0 means"
359 " disable. 1 means conservatively place devices into D3 state. 2 means"
360 " aggressively place devices into D3 state. 3 means put absolutely"
361 " everything in D3 state.");
363 int pci_do_power_resume = 1;
364 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_resume, CTLFLAG_RWTUN,
365 &pci_do_power_resume, 1,
366 "Transition from D3 -> D0 on resume.");
368 int pci_do_power_suspend = 1;
369 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_suspend, CTLFLAG_RWTUN,
370 &pci_do_power_suspend, 1,
371 "Transition from D0 -> D3 on suspend.");
373 static int pci_do_msi = 1;
374 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msi, CTLFLAG_RWTUN, &pci_do_msi, 1,
375 "Enable support for MSI interrupts");
377 static int pci_do_msix = 1;
378 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msix, CTLFLAG_RWTUN, &pci_do_msix, 1,
379 "Enable support for MSI-X interrupts");
381 static int pci_msix_rewrite_table = 0;
382 SYSCTL_INT(_hw_pci, OID_AUTO, msix_rewrite_table, CTLFLAG_RWTUN,
383 &pci_msix_rewrite_table, 0,
384 "Rewrite entire MSI-X table when updating MSI-X entries");
386 static int pci_honor_msi_blacklist = 1;
387 SYSCTL_INT(_hw_pci, OID_AUTO, honor_msi_blacklist, CTLFLAG_RDTUN,
388 &pci_honor_msi_blacklist, 1, "Honor chipset blacklist for MSI/MSI-X");
390 #if defined(__i386__) || defined(__amd64__)
391 static int pci_usb_takeover = 1;
393 static int pci_usb_takeover = 0;
395 SYSCTL_INT(_hw_pci, OID_AUTO, usb_early_takeover, CTLFLAG_RDTUN,
396 &pci_usb_takeover, 1,
397 "Enable early takeover of USB controllers. Disable this if you depend on"
398 " BIOS emulation of USB devices, that is you use USB devices (like"
399 " keyboard or mouse) but do not load USB drivers");
401 static int pci_clear_bars;
402 SYSCTL_INT(_hw_pci, OID_AUTO, clear_bars, CTLFLAG_RDTUN, &pci_clear_bars, 0,
403 "Ignore firmware-assigned resources for BARs.");
405 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
406 static int pci_clear_buses;
407 SYSCTL_INT(_hw_pci, OID_AUTO, clear_buses, CTLFLAG_RDTUN, &pci_clear_buses, 0,
408 "Ignore firmware-assigned bus numbers.");
411 static int pci_enable_ari = 1;
412 SYSCTL_INT(_hw_pci, OID_AUTO, enable_ari, CTLFLAG_RDTUN, &pci_enable_ari,
413 0, "Enable support for PCIe Alternative RID Interpretation");
415 int pci_enable_aspm = 1;
416 SYSCTL_INT(_hw_pci, OID_AUTO, enable_aspm, CTLFLAG_RDTUN, &pci_enable_aspm,
417 0, "Enable support for PCIe Active State Power Management");
419 static int pci_clear_aer_on_attach = 0;
420 SYSCTL_INT(_hw_pci, OID_AUTO, clear_aer_on_attach, CTLFLAG_RWTUN,
421 &pci_clear_aer_on_attach, 0,
422 "Clear port and device AER state on driver attach");
425 pci_has_quirk(uint32_t devid, int quirk)
427 const struct pci_quirk *q;
429 for (q = &pci_quirks[0]; q->devid; q++) {
430 if (q->devid == devid && q->type == quirk)
436 /* Find a device_t by bus/slot/function in domain 0 */
439 pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func)
442 return (pci_find_dbsf(0, bus, slot, func));
445 /* Find a device_t by domain/bus/slot/function */
448 pci_find_dbsf(uint32_t domain, uint8_t bus, uint8_t slot, uint8_t func)
450 struct pci_devinfo *dinfo = NULL;
452 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
453 if ((dinfo->cfg.domain == domain) &&
454 (dinfo->cfg.bus == bus) &&
455 (dinfo->cfg.slot == slot) &&
456 (dinfo->cfg.func == func)) {
461 return (dinfo != NULL ? dinfo->cfg.dev : NULL);
464 /* Find a device_t by vendor/device ID */
467 pci_find_device(uint16_t vendor, uint16_t device)
469 struct pci_devinfo *dinfo;
471 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
472 if ((dinfo->cfg.vendor == vendor) &&
473 (dinfo->cfg.device == device)) {
474 return (dinfo->cfg.dev);
482 pci_find_class(uint8_t class, uint8_t subclass)
484 struct pci_devinfo *dinfo;
486 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
487 if (dinfo->cfg.baseclass == class &&
488 dinfo->cfg.subclass == subclass) {
489 return (dinfo->cfg.dev);
497 pci_find_class_from(uint8_t class, uint8_t subclass, device_t from)
499 struct pci_devinfo *dinfo;
502 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
503 if (from != NULL && found == false) {
504 if (from != dinfo->cfg.dev)
509 if (dinfo->cfg.baseclass == class &&
510 dinfo->cfg.subclass == subclass) {
511 return (dinfo->cfg.dev);
519 pci_printf(pcicfgregs *cfg, const char *fmt, ...)
524 retval = printf("pci%d:%d:%d:%d: ", cfg->domain, cfg->bus, cfg->slot,
527 retval += vprintf(fmt, ap);
532 /* return base address of memory or port map */
535 pci_mapbase(uint64_t mapreg)
538 if (PCI_BAR_MEM(mapreg))
539 return (mapreg & PCIM_BAR_MEM_BASE);
541 return (mapreg & PCIM_BAR_IO_BASE);
544 /* return map type of memory or port map */
547 pci_maptype(uint64_t mapreg)
550 if (PCI_BAR_IO(mapreg))
552 if (mapreg & PCIM_BAR_MEM_PREFETCH)
553 return ("Prefetchable Memory");
557 /* return log2 of map size decoded for memory or port map */
560 pci_mapsize(uint64_t testval)
564 testval = pci_mapbase(testval);
567 while ((testval & 1) == 0)
576 /* return base address of device ROM */
579 pci_rombase(uint64_t mapreg)
582 return (mapreg & PCIM_BIOS_ADDR_MASK);
585 /* return log2 of map size decided for device ROM */
588 pci_romsize(uint64_t testval)
592 testval = pci_rombase(testval);
595 while ((testval & 1) == 0)
604 /* return log2 of address range supported by map register */
607 pci_maprange(uint64_t mapreg)
611 if (PCI_BAR_IO(mapreg))
614 switch (mapreg & PCIM_BAR_MEM_TYPE) {
615 case PCIM_BAR_MEM_32:
618 case PCIM_BAR_MEM_1MB:
621 case PCIM_BAR_MEM_64:
628 /* adjust some values from PCI 1.0 devices to match 2.0 standards ... */
631 pci_fixancient(pcicfgregs *cfg)
633 if ((cfg->hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL)
636 /* PCI to PCI bridges use header type 1 */
637 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI)
638 cfg->hdrtype = PCIM_HDRTYPE_BRIDGE;
641 /* extract header type specific config data */
644 pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg)
646 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
647 switch (cfg->hdrtype & PCIM_HDRTYPE) {
648 case PCIM_HDRTYPE_NORMAL:
649 cfg->subvendor = REG(PCIR_SUBVEND_0, 2);
650 cfg->subdevice = REG(PCIR_SUBDEV_0, 2);
651 cfg->mingnt = REG(PCIR_MINGNT, 1);
652 cfg->maxlat = REG(PCIR_MAXLAT, 1);
653 cfg->nummaps = PCI_MAXMAPS_0;
655 case PCIM_HDRTYPE_BRIDGE:
656 cfg->bridge.br_seclat = REG(PCIR_SECLAT_1, 1);
657 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_1, 1);
658 cfg->bridge.br_secbus = REG(PCIR_SECBUS_1, 1);
659 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_1, 1);
660 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_1, 2);
661 cfg->nummaps = PCI_MAXMAPS_1;
663 case PCIM_HDRTYPE_CARDBUS:
664 cfg->bridge.br_seclat = REG(PCIR_SECLAT_2, 1);
665 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_2, 1);
666 cfg->bridge.br_secbus = REG(PCIR_SECBUS_2, 1);
667 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_2, 1);
668 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_2, 2);
669 cfg->subvendor = REG(PCIR_SUBVEND_2, 2);
670 cfg->subdevice = REG(PCIR_SUBDEV_2, 2);
671 cfg->nummaps = PCI_MAXMAPS_2;
677 /* read configuration header into pcicfgregs structure */
679 pci_read_device(device_t pcib, device_t bus, int d, int b, int s, int f)
681 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
684 vid = REG(PCIR_VENDOR, 2);
685 did = REG(PCIR_DEVICE, 2);
687 return (pci_fill_devinfo(pcib, bus, d, b, s, f, vid, did));
693 pci_alloc_devinfo_method(device_t dev)
696 return (malloc(sizeof(struct pci_devinfo), M_DEVBUF,
700 static struct pci_devinfo *
701 pci_fill_devinfo(device_t pcib, device_t bus, int d, int b, int s, int f,
702 uint16_t vid, uint16_t did)
704 struct pci_devinfo *devlist_entry;
707 devlist_entry = PCI_ALLOC_DEVINFO(bus);
709 cfg = &devlist_entry->cfg;
717 cfg->cmdreg = REG(PCIR_COMMAND, 2);
718 cfg->statreg = REG(PCIR_STATUS, 2);
719 cfg->baseclass = REG(PCIR_CLASS, 1);
720 cfg->subclass = REG(PCIR_SUBCLASS, 1);
721 cfg->progif = REG(PCIR_PROGIF, 1);
722 cfg->revid = REG(PCIR_REVID, 1);
723 cfg->hdrtype = REG(PCIR_HDRTYPE, 1);
724 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1);
725 cfg->lattimer = REG(PCIR_LATTIMER, 1);
726 cfg->intpin = REG(PCIR_INTPIN, 1);
727 cfg->intline = REG(PCIR_INTLINE, 1);
729 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0;
730 cfg->hdrtype &= ~PCIM_MFDEV;
731 STAILQ_INIT(&cfg->maps);
736 pci_hdrtypedata(pcib, b, s, f, cfg);
738 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT)
739 pci_read_cap(pcib, cfg);
741 STAILQ_INSERT_TAIL(&pci_devq, devlist_entry, pci_links);
743 devlist_entry->conf.pc_sel.pc_domain = cfg->domain;
744 devlist_entry->conf.pc_sel.pc_bus = cfg->bus;
745 devlist_entry->conf.pc_sel.pc_dev = cfg->slot;
746 devlist_entry->conf.pc_sel.pc_func = cfg->func;
747 devlist_entry->conf.pc_hdr = cfg->hdrtype;
749 devlist_entry->conf.pc_subvendor = cfg->subvendor;
750 devlist_entry->conf.pc_subdevice = cfg->subdevice;
751 devlist_entry->conf.pc_vendor = cfg->vendor;
752 devlist_entry->conf.pc_device = cfg->device;
754 devlist_entry->conf.pc_class = cfg->baseclass;
755 devlist_entry->conf.pc_subclass = cfg->subclass;
756 devlist_entry->conf.pc_progif = cfg->progif;
757 devlist_entry->conf.pc_revid = cfg->revid;
762 return (devlist_entry);
767 pci_ea_fill_info(device_t pcib, pcicfgregs *cfg)
769 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, \
770 cfg->ea.ea_location + (n), w)
777 uint64_t base, max_offset;
778 struct pci_ea_entry *eae;
780 if (cfg->ea.ea_location == 0)
783 STAILQ_INIT(&cfg->ea.ea_entries);
785 /* Determine the number of entries */
786 num_ent = REG(PCIR_EA_NUM_ENT, 2);
787 num_ent &= PCIM_EA_NUM_ENT_MASK;
789 /* Find the first entry to care of */
790 ptr = PCIR_EA_FIRST_ENT;
792 /* Skip DWORD 2 for type 1 functions */
793 if ((cfg->hdrtype & PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE)
796 for (a = 0; a < num_ent; a++) {
797 eae = malloc(sizeof(*eae), M_DEVBUF, M_WAITOK | M_ZERO);
798 eae->eae_cfg_offset = cfg->ea.ea_location + ptr;
800 /* Read a number of dwords in the entry */
803 ent_size = (val & PCIM_EA_ES);
805 for (b = 0; b < ent_size; b++) {
810 eae->eae_flags = val;
811 eae->eae_bei = (PCIM_EA_BEI & val) >> PCIM_EA_BEI_OFFSET;
813 base = dw[0] & PCIM_EA_FIELD_MASK;
814 max_offset = dw[1] | ~PCIM_EA_FIELD_MASK;
816 if (((dw[0] & PCIM_EA_IS_64) != 0) && (b < ent_size)) {
817 base |= (uint64_t)dw[b] << 32UL;
820 if (((dw[1] & PCIM_EA_IS_64) != 0)
822 max_offset |= (uint64_t)dw[b] << 32UL;
826 eae->eae_base = base;
827 eae->eae_max_offset = max_offset;
829 STAILQ_INSERT_TAIL(&cfg->ea.ea_entries, eae, eae_link);
832 printf("PCI(EA) dev %04x:%04x, bei %d, flags #%x, base #%jx, max_offset #%jx\n",
833 cfg->vendor, cfg->device, eae->eae_bei, eae->eae_flags,
834 (uintmax_t)eae->eae_base, (uintmax_t)eae->eae_max_offset);
841 pci_read_cap(device_t pcib, pcicfgregs *cfg)
843 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w)
844 #define WREG(n, v, w) PCIB_WRITE_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, v, w)
845 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
849 int ptr, nextptr, ptrptr;
851 switch (cfg->hdrtype & PCIM_HDRTYPE) {
852 case PCIM_HDRTYPE_NORMAL:
853 case PCIM_HDRTYPE_BRIDGE:
854 ptrptr = PCIR_CAP_PTR;
856 case PCIM_HDRTYPE_CARDBUS:
857 ptrptr = PCIR_CAP_PTR_2; /* cardbus capabilities ptr */
860 return; /* no extended capabilities support */
862 nextptr = REG(ptrptr, 1); /* sanity check? */
865 * Read capability entries.
867 while (nextptr != 0) {
870 printf("illegal PCI extended capability offset %d\n",
874 /* Find the next entry */
876 nextptr = REG(ptr + PCICAP_NEXTPTR, 1);
878 /* Process this entry */
879 switch (REG(ptr + PCICAP_ID, 1)) {
880 case PCIY_PMG: /* PCI power management */
881 if (cfg->pp.pp_cap == 0) {
882 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2);
883 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS;
884 cfg->pp.pp_bse = ptr + PCIR_POWER_BSE;
885 if ((nextptr - ptr) > PCIR_POWER_DATA)
886 cfg->pp.pp_data = ptr + PCIR_POWER_DATA;
889 case PCIY_HT: /* HyperTransport */
890 /* Determine HT-specific capability type. */
891 val = REG(ptr + PCIR_HT_COMMAND, 2);
893 if ((val & 0xe000) == PCIM_HTCAP_SLAVE)
894 cfg->ht.ht_slave = ptr;
896 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
897 switch (val & PCIM_HTCMD_CAP_MASK) {
898 case PCIM_HTCAP_MSI_MAPPING:
899 if (!(val & PCIM_HTCMD_MSI_FIXED)) {
900 /* Sanity check the mapping window. */
901 addr = REG(ptr + PCIR_HTMSI_ADDRESS_HI,
904 addr |= REG(ptr + PCIR_HTMSI_ADDRESS_LO,
906 if (addr != MSI_INTEL_ADDR_BASE)
908 "HT device at pci%d:%d:%d:%d has non-default MSI window 0x%llx\n",
909 cfg->domain, cfg->bus,
910 cfg->slot, cfg->func,
913 addr = MSI_INTEL_ADDR_BASE;
915 cfg->ht.ht_msimap = ptr;
916 cfg->ht.ht_msictrl = val;
917 cfg->ht.ht_msiaddr = addr;
922 case PCIY_MSI: /* PCI MSI */
923 cfg->msi.msi_location = ptr;
924 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2);
925 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl &
926 PCIM_MSICTRL_MMC_MASK)>>1);
928 case PCIY_MSIX: /* PCI MSI-X */
929 cfg->msix.msix_location = ptr;
930 cfg->msix.msix_ctrl = REG(ptr + PCIR_MSIX_CTRL, 2);
931 cfg->msix.msix_msgnum = (cfg->msix.msix_ctrl &
932 PCIM_MSIXCTRL_TABLE_SIZE) + 1;
933 val = REG(ptr + PCIR_MSIX_TABLE, 4);
934 cfg->msix.msix_table_bar = PCIR_BAR(val &
936 cfg->msix.msix_table_offset = val & ~PCIM_MSIX_BIR_MASK;
937 val = REG(ptr + PCIR_MSIX_PBA, 4);
938 cfg->msix.msix_pba_bar = PCIR_BAR(val &
940 cfg->msix.msix_pba_offset = val & ~PCIM_MSIX_BIR_MASK;
942 case PCIY_VPD: /* PCI Vital Product Data */
943 cfg->vpd.vpd_reg = ptr;
946 /* Should always be true. */
947 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
948 PCIM_HDRTYPE_BRIDGE) {
949 val = REG(ptr + PCIR_SUBVENDCAP_ID, 4);
950 cfg->subvendor = val & 0xffff;
951 cfg->subdevice = val >> 16;
954 case PCIY_PCIX: /* PCI-X */
956 * Assume we have a PCI-X chipset if we have
957 * at least one PCI-PCI bridge with a PCI-X
958 * capability. Note that some systems with
959 * PCI-express or HT chipsets might match on
960 * this check as well.
962 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
965 cfg->pcix.pcix_location = ptr;
967 case PCIY_EXPRESS: /* PCI-express */
969 * Assume we have a PCI-express chipset if we have
970 * at least one PCI-express device.
973 cfg->pcie.pcie_location = ptr;
974 val = REG(ptr + PCIER_FLAGS, 2);
975 cfg->pcie.pcie_type = val & PCIEM_FLAGS_TYPE;
977 case PCIY_EA: /* Enhanced Allocation */
978 cfg->ea.ea_location = ptr;
979 pci_ea_fill_info(pcib, cfg);
986 #if defined(__powerpc__)
988 * Enable the MSI mapping window for all HyperTransport
989 * slaves. PCI-PCI bridges have their windows enabled via
992 if (cfg->ht.ht_slave != 0 && cfg->ht.ht_msimap != 0 &&
993 !(cfg->ht.ht_msictrl & PCIM_HTCMD_MSI_ENABLE)) {
995 "Enabling MSI window for HyperTransport slave at pci%d:%d:%d:%d\n",
996 cfg->domain, cfg->bus, cfg->slot, cfg->func);
997 cfg->ht.ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
998 WREG(cfg->ht.ht_msimap + PCIR_HT_COMMAND, cfg->ht.ht_msictrl,
1002 /* REG and WREG use carry through to next functions */
1006 * PCI Vital Product Data
1009 #define PCI_VPD_TIMEOUT 1000000
1012 pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t *data)
1014 int count = PCI_VPD_TIMEOUT;
1016 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
1018 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg, 2);
1020 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) != 0x8000) {
1023 DELAY(1); /* limit looping */
1025 *data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4));
1032 pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t data)
1034 int count = PCI_VPD_TIMEOUT;
1036 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
1038 WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4);
1039 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg | 0x8000, 2);
1040 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) == 0x8000) {
1043 DELAY(1); /* limit looping */
1050 #undef PCI_VPD_TIMEOUT
1052 struct vpd_readstate {
1062 vpd_nextbyte(struct vpd_readstate *vrs, uint8_t *data)
1067 if (vrs->bytesinval == 0) {
1068 if (pci_read_vpd_reg(vrs->pcib, vrs->cfg, vrs->off, ®))
1070 vrs->val = le32toh(reg);
1072 byte = vrs->val & 0xff;
1073 vrs->bytesinval = 3;
1075 vrs->val = vrs->val >> 8;
1076 byte = vrs->val & 0xff;
1086 pci_read_vpd(device_t pcib, pcicfgregs *cfg)
1088 struct vpd_readstate vrs;
1093 int alloc, off; /* alloc/off for RO/W arrays */
1099 /* init vpd reader */
1107 name = remain = i = 0; /* shut up stupid gcc */
1108 alloc = off = 0; /* shut up stupid gcc */
1109 dflen = 0; /* shut up stupid gcc */
1111 while (state >= 0) {
1112 if (vpd_nextbyte(&vrs, &byte)) {
1117 printf("vpd: val: %#x, off: %d, bytesinval: %d, byte: %#hhx, " \
1118 "state: %d, remain: %d, name: %#x, i: %d\n", vrs.val,
1119 vrs.off, vrs.bytesinval, byte, state, remain, name, i);
1122 case 0: /* item name */
1124 if (vpd_nextbyte(&vrs, &byte2)) {
1129 if (vpd_nextbyte(&vrs, &byte2)) {
1133 remain |= byte2 << 8;
1136 remain = byte & 0x7;
1137 name = (byte >> 3) & 0xf;
1139 if (vrs.off + remain - vrs.bytesinval > 0x8000) {
1141 "VPD data overflow, remain %#x\n", remain);
1146 case 0x2: /* String */
1147 cfg->vpd.vpd_ident = malloc(remain + 1,
1148 M_DEVBUF, M_WAITOK);
1155 case 0x10: /* VPD-R */
1158 cfg->vpd.vpd_ros = malloc(alloc *
1159 sizeof(*cfg->vpd.vpd_ros), M_DEVBUF,
1163 case 0x11: /* VPD-W */
1166 cfg->vpd.vpd_w = malloc(alloc *
1167 sizeof(*cfg->vpd.vpd_w), M_DEVBUF,
1171 default: /* Invalid data, abort */
1177 case 1: /* Identifier String */
1178 cfg->vpd.vpd_ident[i++] = byte;
1181 cfg->vpd.vpd_ident[i] = '\0';
1186 case 2: /* VPD-R Keyword Header */
1188 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1189 (alloc *= 2) * sizeof(*cfg->vpd.vpd_ros),
1190 M_DEVBUF, M_WAITOK | M_ZERO);
1192 cfg->vpd.vpd_ros[off].keyword[0] = byte;
1193 if (vpd_nextbyte(&vrs, &byte2)) {
1197 cfg->vpd.vpd_ros[off].keyword[1] = byte2;
1198 if (vpd_nextbyte(&vrs, &byte2)) {
1202 cfg->vpd.vpd_ros[off].len = dflen = byte2;
1204 strncmp(cfg->vpd.vpd_ros[off].keyword, "RV",
1207 * if this happens, we can't trust the rest
1210 pci_printf(cfg, "bad keyword length: %d\n",
1215 } else if (dflen == 0) {
1216 cfg->vpd.vpd_ros[off].value = malloc(1 *
1217 sizeof(*cfg->vpd.vpd_ros[off].value),
1218 M_DEVBUF, M_WAITOK);
1219 cfg->vpd.vpd_ros[off].value[0] = '\x00';
1221 cfg->vpd.vpd_ros[off].value = malloc(
1223 sizeof(*cfg->vpd.vpd_ros[off].value),
1224 M_DEVBUF, M_WAITOK);
1227 /* keep in sync w/ state 3's transistions */
1228 if (dflen == 0 && remain == 0)
1230 else if (dflen == 0)
1236 case 3: /* VPD-R Keyword Value */
1237 cfg->vpd.vpd_ros[off].value[i++] = byte;
1238 if (strncmp(cfg->vpd.vpd_ros[off].keyword,
1239 "RV", 2) == 0 && cksumvalid == -1) {
1245 "bad VPD cksum, remain %hhu\n",
1254 /* keep in sync w/ state 2's transistions */
1256 cfg->vpd.vpd_ros[off++].value[i++] = '\0';
1257 if (dflen == 0 && remain == 0) {
1258 cfg->vpd.vpd_rocnt = off;
1259 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1260 off * sizeof(*cfg->vpd.vpd_ros),
1261 M_DEVBUF, M_WAITOK | M_ZERO);
1263 } else if (dflen == 0)
1273 case 5: /* VPD-W Keyword Header */
1275 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1276 (alloc *= 2) * sizeof(*cfg->vpd.vpd_w),
1277 M_DEVBUF, M_WAITOK | M_ZERO);
1279 cfg->vpd.vpd_w[off].keyword[0] = byte;
1280 if (vpd_nextbyte(&vrs, &byte2)) {
1284 cfg->vpd.vpd_w[off].keyword[1] = byte2;
1285 if (vpd_nextbyte(&vrs, &byte2)) {
1289 cfg->vpd.vpd_w[off].len = dflen = byte2;
1290 cfg->vpd.vpd_w[off].start = vrs.off - vrs.bytesinval;
1291 cfg->vpd.vpd_w[off].value = malloc((dflen + 1) *
1292 sizeof(*cfg->vpd.vpd_w[off].value),
1293 M_DEVBUF, M_WAITOK);
1296 /* keep in sync w/ state 6's transistions */
1297 if (dflen == 0 && remain == 0)
1299 else if (dflen == 0)
1305 case 6: /* VPD-W Keyword Value */
1306 cfg->vpd.vpd_w[off].value[i++] = byte;
1309 /* keep in sync w/ state 5's transistions */
1311 cfg->vpd.vpd_w[off++].value[i++] = '\0';
1312 if (dflen == 0 && remain == 0) {
1313 cfg->vpd.vpd_wcnt = off;
1314 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1315 off * sizeof(*cfg->vpd.vpd_w),
1316 M_DEVBUF, M_WAITOK | M_ZERO);
1318 } else if (dflen == 0)
1323 pci_printf(cfg, "invalid state: %d\n", state);
1329 if (cksumvalid == 0 || state < -1) {
1330 /* read-only data bad, clean up */
1331 if (cfg->vpd.vpd_ros != NULL) {
1332 for (off = 0; cfg->vpd.vpd_ros[off].value; off++)
1333 free(cfg->vpd.vpd_ros[off].value, M_DEVBUF);
1334 free(cfg->vpd.vpd_ros, M_DEVBUF);
1335 cfg->vpd.vpd_ros = NULL;
1339 /* I/O error, clean up */
1340 pci_printf(cfg, "failed to read VPD data.\n");
1341 if (cfg->vpd.vpd_ident != NULL) {
1342 free(cfg->vpd.vpd_ident, M_DEVBUF);
1343 cfg->vpd.vpd_ident = NULL;
1345 if (cfg->vpd.vpd_w != NULL) {
1346 for (off = 0; cfg->vpd.vpd_w[off].value; off++)
1347 free(cfg->vpd.vpd_w[off].value, M_DEVBUF);
1348 free(cfg->vpd.vpd_w, M_DEVBUF);
1349 cfg->vpd.vpd_w = NULL;
1352 cfg->vpd.vpd_cached = 1;
1358 pci_get_vpd_ident_method(device_t dev, device_t child, const char **identptr)
1360 struct pci_devinfo *dinfo = device_get_ivars(child);
1361 pcicfgregs *cfg = &dinfo->cfg;
1363 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1364 pci_read_vpd(device_get_parent(dev), cfg);
1366 *identptr = cfg->vpd.vpd_ident;
1368 if (*identptr == NULL)
1375 pci_get_vpd_readonly_method(device_t dev, device_t child, const char *kw,
1378 struct pci_devinfo *dinfo = device_get_ivars(child);
1379 pcicfgregs *cfg = &dinfo->cfg;
1382 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1383 pci_read_vpd(device_get_parent(dev), cfg);
1385 for (i = 0; i < cfg->vpd.vpd_rocnt; i++)
1386 if (memcmp(kw, cfg->vpd.vpd_ros[i].keyword,
1387 sizeof(cfg->vpd.vpd_ros[i].keyword)) == 0) {
1388 *vptr = cfg->vpd.vpd_ros[i].value;
1397 pci_fetch_vpd_list(device_t dev)
1399 struct pci_devinfo *dinfo = device_get_ivars(dev);
1400 pcicfgregs *cfg = &dinfo->cfg;
1402 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1403 pci_read_vpd(device_get_parent(device_get_parent(dev)), cfg);
1408 * Find the requested HyperTransport capability and return the offset
1409 * in configuration space via the pointer provided. The function
1410 * returns 0 on success and an error code otherwise.
1413 pci_find_htcap_method(device_t dev, device_t child, int capability, int *capreg)
1418 error = pci_find_cap(child, PCIY_HT, &ptr);
1423 * Traverse the capabilities list checking each HT capability
1424 * to see if it matches the requested HT capability.
1427 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1428 if (capability == PCIM_HTCAP_SLAVE ||
1429 capability == PCIM_HTCAP_HOST)
1432 val &= PCIM_HTCMD_CAP_MASK;
1433 if (val == capability) {
1439 /* Skip to the next HT capability. */
1440 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1448 * Find the next requested HyperTransport capability after start and return
1449 * the offset in configuration space via the pointer provided. The function
1450 * returns 0 on success and an error code otherwise.
1453 pci_find_next_htcap_method(device_t dev, device_t child, int capability,
1454 int start, int *capreg)
1459 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == PCIY_HT,
1460 ("start capability is not HyperTransport capability"));
1464 * Traverse the capabilities list checking each HT capability
1465 * to see if it matches the requested HT capability.
1468 /* Skip to the next HT capability. */
1469 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1472 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1473 if (capability == PCIM_HTCAP_SLAVE ||
1474 capability == PCIM_HTCAP_HOST)
1477 val &= PCIM_HTCMD_CAP_MASK;
1478 if (val == capability) {
1489 * Find the requested capability and return the offset in
1490 * configuration space via the pointer provided. The function returns
1491 * 0 on success and an error code otherwise.
1494 pci_find_cap_method(device_t dev, device_t child, int capability,
1497 struct pci_devinfo *dinfo = device_get_ivars(child);
1498 pcicfgregs *cfg = &dinfo->cfg;
1503 * Check the CAP_LIST bit of the PCI status register first.
1505 status = pci_read_config(child, PCIR_STATUS, 2);
1506 if (!(status & PCIM_STATUS_CAPPRESENT))
1510 * Determine the start pointer of the capabilities list.
1512 switch (cfg->hdrtype & PCIM_HDRTYPE) {
1513 case PCIM_HDRTYPE_NORMAL:
1514 case PCIM_HDRTYPE_BRIDGE:
1517 case PCIM_HDRTYPE_CARDBUS:
1518 ptr = PCIR_CAP_PTR_2;
1522 return (ENXIO); /* no extended capabilities support */
1524 ptr = pci_read_config(child, ptr, 1);
1527 * Traverse the capabilities list.
1530 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1535 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1542 * Find the next requested capability after start and return the offset in
1543 * configuration space via the pointer provided. The function returns
1544 * 0 on success and an error code otherwise.
1547 pci_find_next_cap_method(device_t dev, device_t child, int capability,
1548 int start, int *capreg)
1552 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == capability,
1553 ("start capability is not expected capability"));
1555 ptr = pci_read_config(child, start + PCICAP_NEXTPTR, 1);
1557 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1562 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1569 * Find the requested extended capability and return the offset in
1570 * configuration space via the pointer provided. The function returns
1571 * 0 on success and an error code otherwise.
1574 pci_find_extcap_method(device_t dev, device_t child, int capability,
1577 struct pci_devinfo *dinfo = device_get_ivars(child);
1578 pcicfgregs *cfg = &dinfo->cfg;
1582 /* Only supported for PCI-express devices. */
1583 if (cfg->pcie.pcie_location == 0)
1587 ecap = pci_read_config(child, ptr, 4);
1588 if (ecap == 0xffffffff || ecap == 0)
1591 if (PCI_EXTCAP_ID(ecap) == capability) {
1596 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1599 ecap = pci_read_config(child, ptr, 4);
1606 * Find the next requested extended capability after start and return the
1607 * offset in configuration space via the pointer provided. The function
1608 * returns 0 on success and an error code otherwise.
1611 pci_find_next_extcap_method(device_t dev, device_t child, int capability,
1612 int start, int *capreg)
1614 struct pci_devinfo *dinfo = device_get_ivars(child);
1615 pcicfgregs *cfg = &dinfo->cfg;
1619 /* Only supported for PCI-express devices. */
1620 if (cfg->pcie.pcie_location == 0)
1623 ecap = pci_read_config(child, start, 4);
1624 KASSERT(PCI_EXTCAP_ID(ecap) == capability,
1625 ("start extended capability is not expected capability"));
1626 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1628 ecap = pci_read_config(child, ptr, 4);
1629 if (PCI_EXTCAP_ID(ecap) == capability) {
1634 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1641 * Support for MSI-X message interrupts.
1644 pci_write_msix_entry(device_t dev, u_int index, uint64_t address, uint32_t data)
1646 struct pci_devinfo *dinfo = device_get_ivars(dev);
1647 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1650 KASSERT(msix->msix_table_len > index, ("bogus index"));
1651 offset = msix->msix_table_offset + index * 16;
1652 bus_write_4(msix->msix_table_res, offset, address & 0xffffffff);
1653 bus_write_4(msix->msix_table_res, offset + 4, address >> 32);
1654 bus_write_4(msix->msix_table_res, offset + 8, data);
1658 pci_enable_msix_method(device_t dev, device_t child, u_int index,
1659 uint64_t address, uint32_t data)
1662 if (pci_msix_rewrite_table) {
1663 struct pci_devinfo *dinfo = device_get_ivars(child);
1664 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1667 * Some VM hosts require MSIX to be disabled in the
1668 * control register before updating the MSIX table
1669 * entries are allowed. It is not enough to only
1670 * disable MSIX while updating a single entry. MSIX
1671 * must be disabled while updating all entries in the
1674 pci_write_config(child,
1675 msix->msix_location + PCIR_MSIX_CTRL,
1676 msix->msix_ctrl & ~PCIM_MSIXCTRL_MSIX_ENABLE, 2);
1677 pci_resume_msix(child);
1679 pci_write_msix_entry(child, index, address, data);
1681 /* Enable MSI -> HT mapping. */
1682 pci_ht_map_msi(child, address);
1686 pci_mask_msix(device_t dev, u_int index)
1688 struct pci_devinfo *dinfo = device_get_ivars(dev);
1689 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1690 uint32_t offset, val;
1692 KASSERT(msix->msix_msgnum > index, ("bogus index"));
1693 offset = msix->msix_table_offset + index * 16 + 12;
1694 val = bus_read_4(msix->msix_table_res, offset);
1695 val |= PCIM_MSIX_VCTRL_MASK;
1698 * Some devices (e.g. Samsung PM961) do not support reads of this
1699 * register, so always write the new value.
1701 bus_write_4(msix->msix_table_res, offset, val);
1705 pci_unmask_msix(device_t dev, u_int index)
1707 struct pci_devinfo *dinfo = device_get_ivars(dev);
1708 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1709 uint32_t offset, val;
1711 KASSERT(msix->msix_table_len > index, ("bogus index"));
1712 offset = msix->msix_table_offset + index * 16 + 12;
1713 val = bus_read_4(msix->msix_table_res, offset);
1714 val &= ~PCIM_MSIX_VCTRL_MASK;
1717 * Some devices (e.g. Samsung PM961) do not support reads of this
1718 * register, so always write the new value.
1720 bus_write_4(msix->msix_table_res, offset, val);
1724 pci_pending_msix(device_t dev, u_int index)
1726 struct pci_devinfo *dinfo = device_get_ivars(dev);
1727 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1728 uint32_t offset, bit;
1730 KASSERT(msix->msix_table_len > index, ("bogus index"));
1731 offset = msix->msix_pba_offset + (index / 32) * 4;
1732 bit = 1 << index % 32;
1733 return (bus_read_4(msix->msix_pba_res, offset) & bit);
1737 * Restore MSI-X registers and table during resume. If MSI-X is
1738 * enabled then walk the virtual table to restore the actual MSI-X
1742 pci_resume_msix(device_t dev)
1744 struct pci_devinfo *dinfo = device_get_ivars(dev);
1745 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1746 struct msix_table_entry *mte;
1747 struct msix_vector *mv;
1750 if (msix->msix_alloc > 0) {
1751 /* First, mask all vectors. */
1752 for (i = 0; i < msix->msix_msgnum; i++)
1753 pci_mask_msix(dev, i);
1755 /* Second, program any messages with at least one handler. */
1756 for (i = 0; i < msix->msix_table_len; i++) {
1757 mte = &msix->msix_table[i];
1758 if (mte->mte_vector == 0 || mte->mte_handlers == 0)
1760 mv = &msix->msix_vectors[mte->mte_vector - 1];
1761 pci_write_msix_entry(dev, i, mv->mv_address,
1763 pci_unmask_msix(dev, i);
1766 pci_write_config(dev, msix->msix_location + PCIR_MSIX_CTRL,
1767 msix->msix_ctrl, 2);
1771 * Attempt to allocate *count MSI-X messages. The actual number allocated is
1772 * returned in *count. After this function returns, each message will be
1773 * available to the driver as SYS_RES_IRQ resources starting at rid 1.
1776 pci_alloc_msix_method(device_t dev, device_t child, int *count)
1778 struct pci_devinfo *dinfo = device_get_ivars(child);
1779 pcicfgregs *cfg = &dinfo->cfg;
1780 struct resource_list_entry *rle;
1781 int actual, error, i, irq, max;
1783 /* Don't let count == 0 get us into trouble. */
1787 /* If rid 0 is allocated, then fail. */
1788 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
1789 if (rle != NULL && rle->res != NULL)
1792 /* Already have allocated messages? */
1793 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
1796 /* If MSI-X is blacklisted for this system, fail. */
1797 if (pci_msix_blacklisted())
1800 /* MSI-X capability present? */
1801 if (cfg->msix.msix_location == 0 || !pci_do_msix)
1804 /* Make sure the appropriate BARs are mapped. */
1805 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1806 cfg->msix.msix_table_bar);
1807 if (rle == NULL || rle->res == NULL ||
1808 !(rman_get_flags(rle->res) & RF_ACTIVE))
1810 cfg->msix.msix_table_res = rle->res;
1811 if (cfg->msix.msix_pba_bar != cfg->msix.msix_table_bar) {
1812 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1813 cfg->msix.msix_pba_bar);
1814 if (rle == NULL || rle->res == NULL ||
1815 !(rman_get_flags(rle->res) & RF_ACTIVE))
1818 cfg->msix.msix_pba_res = rle->res;
1821 device_printf(child,
1822 "attempting to allocate %d MSI-X vectors (%d supported)\n",
1823 *count, cfg->msix.msix_msgnum);
1824 max = min(*count, cfg->msix.msix_msgnum);
1825 for (i = 0; i < max; i++) {
1826 /* Allocate a message. */
1827 error = PCIB_ALLOC_MSIX(device_get_parent(dev), child, &irq);
1833 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
1839 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1);
1841 device_printf(child, "using IRQ %ju for MSI-X\n",
1847 * Be fancy and try to print contiguous runs of
1848 * IRQ values as ranges. 'irq' is the previous IRQ.
1849 * 'run' is true if we are in a range.
1851 device_printf(child, "using IRQs %ju", rle->start);
1854 for (i = 1; i < actual; i++) {
1855 rle = resource_list_find(&dinfo->resources,
1856 SYS_RES_IRQ, i + 1);
1858 /* Still in a run? */
1859 if (rle->start == irq + 1) {
1865 /* Finish previous range. */
1871 /* Start new range. */
1872 printf(",%ju", rle->start);
1876 /* Unfinished range? */
1879 printf(" for MSI-X\n");
1883 /* Mask all vectors. */
1884 for (i = 0; i < cfg->msix.msix_msgnum; i++)
1885 pci_mask_msix(child, i);
1887 /* Allocate and initialize vector data and virtual table. */
1888 cfg->msix.msix_vectors = malloc(sizeof(struct msix_vector) * actual,
1889 M_DEVBUF, M_WAITOK | M_ZERO);
1890 cfg->msix.msix_table = malloc(sizeof(struct msix_table_entry) * actual,
1891 M_DEVBUF, M_WAITOK | M_ZERO);
1892 for (i = 0; i < actual; i++) {
1893 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1894 cfg->msix.msix_vectors[i].mv_irq = rle->start;
1895 cfg->msix.msix_table[i].mte_vector = i + 1;
1898 /* Update control register to enable MSI-X. */
1899 cfg->msix.msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE;
1900 pci_write_config(child, cfg->msix.msix_location + PCIR_MSIX_CTRL,
1901 cfg->msix.msix_ctrl, 2);
1903 /* Update counts of alloc'd messages. */
1904 cfg->msix.msix_alloc = actual;
1905 cfg->msix.msix_table_len = actual;
1911 * By default, pci_alloc_msix() will assign the allocated IRQ
1912 * resources consecutively to the first N messages in the MSI-X table.
1913 * However, device drivers may want to use different layouts if they
1914 * either receive fewer messages than they asked for, or they wish to
1915 * populate the MSI-X table sparsely. This method allows the driver
1916 * to specify what layout it wants. It must be called after a
1917 * successful pci_alloc_msix() but before any of the associated
1918 * SYS_RES_IRQ resources are allocated via bus_alloc_resource().
1920 * The 'vectors' array contains 'count' message vectors. The array
1921 * maps directly to the MSI-X table in that index 0 in the array
1922 * specifies the vector for the first message in the MSI-X table, etc.
1923 * The vector value in each array index can either be 0 to indicate
1924 * that no vector should be assigned to a message slot, or it can be a
1925 * number from 1 to N (where N is the count returned from a
1926 * succcessful call to pci_alloc_msix()) to indicate which message
1927 * vector (IRQ) to be used for the corresponding message.
1929 * On successful return, each message with a non-zero vector will have
1930 * an associated SYS_RES_IRQ whose rid is equal to the array index +
1931 * 1. Additionally, if any of the IRQs allocated via the previous
1932 * call to pci_alloc_msix() are not used in the mapping, those IRQs
1933 * will be freed back to the system automatically.
1935 * For example, suppose a driver has a MSI-X table with 6 messages and
1936 * asks for 6 messages, but pci_alloc_msix() only returns a count of
1937 * 3. Call the three vectors allocated by pci_alloc_msix() A, B, and
1938 * C. After the call to pci_alloc_msix(), the device will be setup to
1939 * have an MSI-X table of ABC--- (where - means no vector assigned).
1940 * If the driver then passes a vector array of { 1, 0, 1, 2, 0, 2 },
1941 * then the MSI-X table will look like A-AB-B, and the 'C' vector will
1942 * be freed back to the system. This device will also have valid
1943 * SYS_RES_IRQ rids of 1, 3, 4, and 6.
1945 * In any case, the SYS_RES_IRQ rid X will always map to the message
1946 * at MSI-X table index X - 1 and will only be valid if a vector is
1947 * assigned to that table entry.
1950 pci_remap_msix_method(device_t dev, device_t child, int count,
1951 const u_int *vectors)
1953 struct pci_devinfo *dinfo = device_get_ivars(child);
1954 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1955 struct resource_list_entry *rle;
1956 int i, irq, j, *used;
1959 * Have to have at least one message in the table but the
1960 * table can't be bigger than the actual MSI-X table in the
1963 if (count == 0 || count > msix->msix_msgnum)
1966 /* Sanity check the vectors. */
1967 for (i = 0; i < count; i++)
1968 if (vectors[i] > msix->msix_alloc)
1972 * Make sure there aren't any holes in the vectors to be used.
1973 * It's a big pain to support it, and it doesn't really make
1974 * sense anyway. Also, at least one vector must be used.
1976 used = malloc(sizeof(int) * msix->msix_alloc, M_DEVBUF, M_WAITOK |
1978 for (i = 0; i < count; i++)
1979 if (vectors[i] != 0)
1980 used[vectors[i] - 1] = 1;
1981 for (i = 0; i < msix->msix_alloc - 1; i++)
1982 if (used[i] == 0 && used[i + 1] == 1) {
1983 free(used, M_DEVBUF);
1987 free(used, M_DEVBUF);
1991 /* Make sure none of the resources are allocated. */
1992 for (i = 0; i < msix->msix_table_len; i++) {
1993 if (msix->msix_table[i].mte_vector == 0)
1995 if (msix->msix_table[i].mte_handlers > 0) {
1996 free(used, M_DEVBUF);
1999 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2000 KASSERT(rle != NULL, ("missing resource"));
2001 if (rle->res != NULL) {
2002 free(used, M_DEVBUF);
2007 /* Free the existing resource list entries. */
2008 for (i = 0; i < msix->msix_table_len; i++) {
2009 if (msix->msix_table[i].mte_vector == 0)
2011 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2015 * Build the new virtual table keeping track of which vectors are
2018 free(msix->msix_table, M_DEVBUF);
2019 msix->msix_table = malloc(sizeof(struct msix_table_entry) * count,
2020 M_DEVBUF, M_WAITOK | M_ZERO);
2021 for (i = 0; i < count; i++)
2022 msix->msix_table[i].mte_vector = vectors[i];
2023 msix->msix_table_len = count;
2025 /* Free any unused IRQs and resize the vectors array if necessary. */
2026 j = msix->msix_alloc - 1;
2028 struct msix_vector *vec;
2030 while (used[j] == 0) {
2031 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2032 msix->msix_vectors[j].mv_irq);
2035 vec = malloc(sizeof(struct msix_vector) * (j + 1), M_DEVBUF,
2037 bcopy(msix->msix_vectors, vec, sizeof(struct msix_vector) *
2039 free(msix->msix_vectors, M_DEVBUF);
2040 msix->msix_vectors = vec;
2041 msix->msix_alloc = j + 1;
2043 free(used, M_DEVBUF);
2045 /* Map the IRQs onto the rids. */
2046 for (i = 0; i < count; i++) {
2047 if (vectors[i] == 0)
2049 irq = msix->msix_vectors[vectors[i] - 1].mv_irq;
2050 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
2055 device_printf(child, "Remapped MSI-X IRQs as: ");
2056 for (i = 0; i < count; i++) {
2059 if (vectors[i] == 0)
2063 msix->msix_vectors[vectors[i] - 1].mv_irq);
2072 pci_release_msix(device_t dev, device_t child)
2074 struct pci_devinfo *dinfo = device_get_ivars(child);
2075 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2076 struct resource_list_entry *rle;
2079 /* Do we have any messages to release? */
2080 if (msix->msix_alloc == 0)
2083 /* Make sure none of the resources are allocated. */
2084 for (i = 0; i < msix->msix_table_len; i++) {
2085 if (msix->msix_table[i].mte_vector == 0)
2087 if (msix->msix_table[i].mte_handlers > 0)
2089 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2090 KASSERT(rle != NULL, ("missing resource"));
2091 if (rle->res != NULL)
2095 /* Update control register to disable MSI-X. */
2096 msix->msix_ctrl &= ~PCIM_MSIXCTRL_MSIX_ENABLE;
2097 pci_write_config(child, msix->msix_location + PCIR_MSIX_CTRL,
2098 msix->msix_ctrl, 2);
2100 /* Free the resource list entries. */
2101 for (i = 0; i < msix->msix_table_len; i++) {
2102 if (msix->msix_table[i].mte_vector == 0)
2104 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2106 free(msix->msix_table, M_DEVBUF);
2107 msix->msix_table_len = 0;
2109 /* Release the IRQs. */
2110 for (i = 0; i < msix->msix_alloc; i++)
2111 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2112 msix->msix_vectors[i].mv_irq);
2113 free(msix->msix_vectors, M_DEVBUF);
2114 msix->msix_alloc = 0;
2119 * Return the max supported MSI-X messages this device supports.
2120 * Basically, assuming the MD code can alloc messages, this function
2121 * should return the maximum value that pci_alloc_msix() can return.
2122 * Thus, it is subject to the tunables, etc.
2125 pci_msix_count_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_msgnum);
2136 pci_msix_pba_bar_method(device_t dev, device_t child)
2138 struct pci_devinfo *dinfo = device_get_ivars(child);
2139 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2141 if (pci_do_msix && msix->msix_location != 0)
2142 return (msix->msix_pba_bar);
2147 pci_msix_table_bar_method(device_t dev, device_t child)
2149 struct pci_devinfo *dinfo = device_get_ivars(child);
2150 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2152 if (pci_do_msix && msix->msix_location != 0)
2153 return (msix->msix_table_bar);
2158 * HyperTransport MSI mapping control
2161 pci_ht_map_msi(device_t dev, uint64_t addr)
2163 struct pci_devinfo *dinfo = device_get_ivars(dev);
2164 struct pcicfg_ht *ht = &dinfo->cfg.ht;
2169 if (addr && !(ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) &&
2170 ht->ht_msiaddr >> 20 == addr >> 20) {
2171 /* Enable MSI -> HT mapping. */
2172 ht->ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
2173 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2177 if (!addr && ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) {
2178 /* Disable MSI -> HT mapping. */
2179 ht->ht_msictrl &= ~PCIM_HTCMD_MSI_ENABLE;
2180 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2186 pci_get_relaxed_ordering_enabled(device_t dev)
2188 struct pci_devinfo *dinfo = device_get_ivars(dev);
2192 cap = dinfo->cfg.pcie.pcie_location;
2195 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2196 val &= PCIEM_CTL_RELAXED_ORD_ENABLE;
2201 pci_get_max_payload(device_t dev)
2203 struct pci_devinfo *dinfo = device_get_ivars(dev);
2207 cap = dinfo->cfg.pcie.pcie_location;
2210 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2211 val &= PCIEM_CTL_MAX_PAYLOAD;
2213 return (1 << (val + 7));
2217 pci_get_max_read_req(device_t dev)
2219 struct pci_devinfo *dinfo = device_get_ivars(dev);
2223 cap = dinfo->cfg.pcie.pcie_location;
2226 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2227 val &= PCIEM_CTL_MAX_READ_REQUEST;
2229 return (1 << (val + 7));
2233 pci_set_max_read_req(device_t dev, int size)
2235 struct pci_devinfo *dinfo = device_get_ivars(dev);
2239 cap = dinfo->cfg.pcie.pcie_location;
2246 size = (1 << (fls(size) - 1));
2247 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2248 val &= ~PCIEM_CTL_MAX_READ_REQUEST;
2249 val |= (fls(size) - 8) << 12;
2250 pci_write_config(dev, cap + PCIER_DEVICE_CTL, val, 2);
2255 pcie_read_config(device_t dev, int reg, int width)
2257 struct pci_devinfo *dinfo = device_get_ivars(dev);
2260 cap = dinfo->cfg.pcie.pcie_location;
2264 return (0xffffffff);
2267 return (pci_read_config(dev, cap + reg, width));
2271 pcie_write_config(device_t dev, int reg, uint32_t value, int width)
2273 struct pci_devinfo *dinfo = device_get_ivars(dev);
2276 cap = dinfo->cfg.pcie.pcie_location;
2279 pci_write_config(dev, cap + reg, value, width);
2283 * Adjusts a PCI-e capability register by clearing the bits in mask
2284 * and setting the bits in (value & mask). Bits not set in mask are
2287 * Returns the old value on success or all ones on failure.
2290 pcie_adjust_config(device_t dev, int reg, uint32_t mask, uint32_t value,
2293 struct pci_devinfo *dinfo = device_get_ivars(dev);
2297 cap = dinfo->cfg.pcie.pcie_location;
2301 return (0xffffffff);
2304 old = pci_read_config(dev, cap + reg, width);
2306 new |= (value & mask);
2307 pci_write_config(dev, cap + reg, new, width);
2312 * Support for MSI message signalled interrupts.
2315 pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
2318 struct pci_devinfo *dinfo = device_get_ivars(child);
2319 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2321 /* Write data and address values. */
2322 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR,
2323 address & 0xffffffff, 4);
2324 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2325 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR_HIGH,
2327 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA_64BIT,
2330 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA, data,
2333 /* Enable MSI in the control register. */
2334 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
2335 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2338 /* Enable MSI -> HT mapping. */
2339 pci_ht_map_msi(child, address);
2343 pci_disable_msi_method(device_t dev, device_t child)
2345 struct pci_devinfo *dinfo = device_get_ivars(child);
2346 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2348 /* Disable MSI -> HT mapping. */
2349 pci_ht_map_msi(child, 0);
2351 /* Disable MSI in the control register. */
2352 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
2353 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2358 * Restore MSI registers during resume. If MSI is enabled then
2359 * restore the data and address registers in addition to the control
2363 pci_resume_msi(device_t dev)
2365 struct pci_devinfo *dinfo = device_get_ivars(dev);
2366 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2370 if (msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE) {
2371 address = msi->msi_addr;
2372 data = msi->msi_data;
2373 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR,
2374 address & 0xffffffff, 4);
2375 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2376 pci_write_config(dev, msi->msi_location +
2377 PCIR_MSI_ADDR_HIGH, address >> 32, 4);
2378 pci_write_config(dev, msi->msi_location +
2379 PCIR_MSI_DATA_64BIT, data, 2);
2381 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA,
2384 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl,
2389 pci_remap_intr_method(device_t bus, device_t dev, u_int irq)
2391 struct pci_devinfo *dinfo = device_get_ivars(dev);
2392 pcicfgregs *cfg = &dinfo->cfg;
2393 struct resource_list_entry *rle;
2394 struct msix_table_entry *mte;
2395 struct msix_vector *mv;
2401 * Handle MSI first. We try to find this IRQ among our list
2402 * of MSI IRQs. If we find it, we request updated address and
2403 * data registers and apply the results.
2405 if (cfg->msi.msi_alloc > 0) {
2406 /* If we don't have any active handlers, nothing to do. */
2407 if (cfg->msi.msi_handlers == 0)
2409 for (i = 0; i < cfg->msi.msi_alloc; i++) {
2410 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ,
2412 if (rle->start == irq) {
2413 error = PCIB_MAP_MSI(device_get_parent(bus),
2414 dev, irq, &addr, &data);
2417 pci_disable_msi(dev);
2418 dinfo->cfg.msi.msi_addr = addr;
2419 dinfo->cfg.msi.msi_data = data;
2420 pci_enable_msi(dev, addr, data);
2428 * For MSI-X, we check to see if we have this IRQ. If we do,
2429 * we request the updated mapping info. If that works, we go
2430 * through all the slots that use this IRQ and update them.
2432 if (cfg->msix.msix_alloc > 0) {
2433 for (i = 0; i < cfg->msix.msix_alloc; i++) {
2434 mv = &cfg->msix.msix_vectors[i];
2435 if (mv->mv_irq == irq) {
2436 error = PCIB_MAP_MSI(device_get_parent(bus),
2437 dev, irq, &addr, &data);
2440 mv->mv_address = addr;
2442 for (j = 0; j < cfg->msix.msix_table_len; j++) {
2443 mte = &cfg->msix.msix_table[j];
2444 if (mte->mte_vector != i + 1)
2446 if (mte->mte_handlers == 0)
2448 pci_mask_msix(dev, j);
2449 pci_enable_msix(dev, j, addr, data);
2450 pci_unmask_msix(dev, j);
2461 * Returns true if the specified device is blacklisted because MSI
2465 pci_msi_device_blacklisted(device_t dev)
2468 if (!pci_honor_msi_blacklist)
2471 return (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSI));
2475 * Determine if MSI is blacklisted globally on this system. Currently,
2476 * we just check for blacklisted chipsets as represented by the
2477 * host-PCI bridge at device 0:0:0. In the future, it may become
2478 * necessary to check other system attributes, such as the kenv values
2479 * that give the motherboard manufacturer and model number.
2482 pci_msi_blacklisted(void)
2486 if (!pci_honor_msi_blacklist)
2489 /* Blacklist all non-PCI-express and non-PCI-X chipsets. */
2490 if (!(pcie_chipset || pcix_chipset)) {
2491 if (vm_guest != VM_GUEST_NO) {
2493 * Whitelist older chipsets in virtual
2494 * machines known to support MSI.
2496 dev = pci_find_bsf(0, 0, 0);
2498 return (!pci_has_quirk(pci_get_devid(dev),
2499 PCI_QUIRK_ENABLE_MSI_VM));
2504 dev = pci_find_bsf(0, 0, 0);
2506 return (pci_msi_device_blacklisted(dev));
2511 * Returns true if the specified device is blacklisted because MSI-X
2512 * doesn't work. Note that this assumes that if MSI doesn't work,
2513 * MSI-X doesn't either.
2516 pci_msix_device_blacklisted(device_t dev)
2519 if (!pci_honor_msi_blacklist)
2522 if (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSIX))
2525 return (pci_msi_device_blacklisted(dev));
2529 * Determine if MSI-X is blacklisted globally on this system. If MSI
2530 * is blacklisted, assume that MSI-X is as well. Check for additional
2531 * chipsets where MSI works but MSI-X does not.
2534 pci_msix_blacklisted(void)
2538 if (!pci_honor_msi_blacklist)
2541 dev = pci_find_bsf(0, 0, 0);
2542 if (dev != NULL && pci_has_quirk(pci_get_devid(dev),
2543 PCI_QUIRK_DISABLE_MSIX))
2546 return (pci_msi_blacklisted());
2550 * Attempt to allocate *count MSI messages. The actual number allocated is
2551 * returned in *count. After this function returns, each message will be
2552 * available to the driver as SYS_RES_IRQ resources starting at a rid 1.
2555 pci_alloc_msi_method(device_t dev, device_t child, int *count)
2557 struct pci_devinfo *dinfo = device_get_ivars(child);
2558 pcicfgregs *cfg = &dinfo->cfg;
2559 struct resource_list_entry *rle;
2560 int actual, error, i, irqs[32];
2563 /* Don't let count == 0 get us into trouble. */
2567 /* If rid 0 is allocated, then fail. */
2568 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
2569 if (rle != NULL && rle->res != NULL)
2572 /* Already have allocated messages? */
2573 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
2576 /* If MSI is blacklisted for this system, fail. */
2577 if (pci_msi_blacklisted())
2580 /* MSI capability present? */
2581 if (cfg->msi.msi_location == 0 || !pci_do_msi)
2585 device_printf(child,
2586 "attempting to allocate %d MSI vectors (%d supported)\n",
2587 *count, cfg->msi.msi_msgnum);
2589 /* Don't ask for more than the device supports. */
2590 actual = min(*count, cfg->msi.msi_msgnum);
2592 /* Don't ask for more than 32 messages. */
2593 actual = min(actual, 32);
2595 /* MSI requires power of 2 number of messages. */
2596 if (!powerof2(actual))
2600 /* Try to allocate N messages. */
2601 error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual,
2613 * We now have N actual messages mapped onto SYS_RES_IRQ
2614 * resources in the irqs[] array, so add new resources
2615 * starting at rid 1.
2617 for (i = 0; i < actual; i++)
2618 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1,
2619 irqs[i], irqs[i], 1);
2623 device_printf(child, "using IRQ %d for MSI\n", irqs[0]);
2628 * Be fancy and try to print contiguous runs
2629 * of IRQ values as ranges. 'run' is true if
2630 * we are in a range.
2632 device_printf(child, "using IRQs %d", irqs[0]);
2634 for (i = 1; i < actual; i++) {
2635 /* Still in a run? */
2636 if (irqs[i] == irqs[i - 1] + 1) {
2641 /* Finish previous range. */
2643 printf("-%d", irqs[i - 1]);
2647 /* Start new range. */
2648 printf(",%d", irqs[i]);
2651 /* Unfinished range? */
2653 printf("-%d", irqs[actual - 1]);
2654 printf(" for MSI\n");
2658 /* Update control register with actual count. */
2659 ctrl = cfg->msi.msi_ctrl;
2660 ctrl &= ~PCIM_MSICTRL_MME_MASK;
2661 ctrl |= (ffs(actual) - 1) << 4;
2662 cfg->msi.msi_ctrl = ctrl;
2663 pci_write_config(child, cfg->msi.msi_location + PCIR_MSI_CTRL, ctrl, 2);
2665 /* Update counts of alloc'd messages. */
2666 cfg->msi.msi_alloc = actual;
2667 cfg->msi.msi_handlers = 0;
2672 /* Release the MSI messages associated with this device. */
2674 pci_release_msi_method(device_t dev, device_t child)
2676 struct pci_devinfo *dinfo = device_get_ivars(child);
2677 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2678 struct resource_list_entry *rle;
2679 int error, i, irqs[32];
2681 /* Try MSI-X first. */
2682 error = pci_release_msix(dev, child);
2683 if (error != ENODEV)
2686 /* Do we have any messages to release? */
2687 if (msi->msi_alloc == 0)
2689 KASSERT(msi->msi_alloc <= 32, ("more than 32 alloc'd messages"));
2691 /* Make sure none of the resources are allocated. */
2692 if (msi->msi_handlers > 0)
2694 for (i = 0; i < msi->msi_alloc; i++) {
2695 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2696 KASSERT(rle != NULL, ("missing MSI resource"));
2697 if (rle->res != NULL)
2699 irqs[i] = rle->start;
2702 /* Update control register with 0 count. */
2703 KASSERT(!(msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE),
2704 ("%s: MSI still enabled", __func__));
2705 msi->msi_ctrl &= ~PCIM_MSICTRL_MME_MASK;
2706 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2709 /* Release the messages. */
2710 PCIB_RELEASE_MSI(device_get_parent(dev), child, msi->msi_alloc, irqs);
2711 for (i = 0; i < msi->msi_alloc; i++)
2712 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2714 /* Update alloc count. */
2722 * Return the max supported MSI messages this device supports.
2723 * Basically, assuming the MD code can alloc messages, this function
2724 * should return the maximum value that pci_alloc_msi() can return.
2725 * Thus, it is subject to the tunables, etc.
2728 pci_msi_count_method(device_t dev, device_t child)
2730 struct pci_devinfo *dinfo = device_get_ivars(child);
2731 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2733 if (pci_do_msi && msi->msi_location != 0)
2734 return (msi->msi_msgnum);
2738 /* free pcicfgregs structure and all depending data structures */
2741 pci_freecfg(struct pci_devinfo *dinfo)
2743 struct devlist *devlist_head;
2744 struct pci_map *pm, *next;
2747 devlist_head = &pci_devq;
2749 if (dinfo->cfg.vpd.vpd_reg) {
2750 free(dinfo->cfg.vpd.vpd_ident, M_DEVBUF);
2751 for (i = 0; i < dinfo->cfg.vpd.vpd_rocnt; i++)
2752 free(dinfo->cfg.vpd.vpd_ros[i].value, M_DEVBUF);
2753 free(dinfo->cfg.vpd.vpd_ros, M_DEVBUF);
2754 for (i = 0; i < dinfo->cfg.vpd.vpd_wcnt; i++)
2755 free(dinfo->cfg.vpd.vpd_w[i].value, M_DEVBUF);
2756 free(dinfo->cfg.vpd.vpd_w, M_DEVBUF);
2758 STAILQ_FOREACH_SAFE(pm, &dinfo->cfg.maps, pm_link, next) {
2761 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links);
2762 free(dinfo, M_DEVBUF);
2764 /* increment the generation count */
2767 /* we're losing one device */
2773 * PCI power manangement
2776 pci_set_powerstate_method(device_t dev, device_t child, int state)
2778 struct pci_devinfo *dinfo = device_get_ivars(child);
2779 pcicfgregs *cfg = &dinfo->cfg;
2781 int oldstate, highest, delay;
2783 if (cfg->pp.pp_cap == 0)
2784 return (EOPNOTSUPP);
2787 * Optimize a no state change request away. While it would be OK to
2788 * write to the hardware in theory, some devices have shown odd
2789 * behavior when going from D3 -> D3.
2791 oldstate = pci_get_powerstate(child);
2792 if (oldstate == state)
2796 * The PCI power management specification states that after a state
2797 * transition between PCI power states, system software must
2798 * guarantee a minimal delay before the function accesses the device.
2799 * Compute the worst case delay that we need to guarantee before we
2800 * access the device. Many devices will be responsive much more
2801 * quickly than this delay, but there are some that don't respond
2802 * instantly to state changes. Transitions to/from D3 state require
2803 * 10ms, while D2 requires 200us, and D0/1 require none. The delay
2804 * is done below with DELAY rather than a sleeper function because
2805 * this function can be called from contexts where we cannot sleep.
2807 highest = (oldstate > state) ? oldstate : state;
2808 if (highest == PCI_POWERSTATE_D3)
2810 else if (highest == PCI_POWERSTATE_D2)
2814 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2)
2815 & ~PCIM_PSTAT_DMASK;
2817 case PCI_POWERSTATE_D0:
2818 status |= PCIM_PSTAT_D0;
2820 case PCI_POWERSTATE_D1:
2821 if ((cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) == 0)
2822 return (EOPNOTSUPP);
2823 status |= PCIM_PSTAT_D1;
2825 case PCI_POWERSTATE_D2:
2826 if ((cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) == 0)
2827 return (EOPNOTSUPP);
2828 status |= PCIM_PSTAT_D2;
2830 case PCI_POWERSTATE_D3:
2831 status |= PCIM_PSTAT_D3;
2838 pci_printf(cfg, "Transition from D%d to D%d\n", oldstate,
2841 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 2);
2848 pci_get_powerstate_method(device_t dev, device_t child)
2850 struct pci_devinfo *dinfo = device_get_ivars(child);
2851 pcicfgregs *cfg = &dinfo->cfg;
2855 if (cfg->pp.pp_cap != 0) {
2856 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2);
2857 switch (status & PCIM_PSTAT_DMASK) {
2859 result = PCI_POWERSTATE_D0;
2862 result = PCI_POWERSTATE_D1;
2865 result = PCI_POWERSTATE_D2;
2868 result = PCI_POWERSTATE_D3;
2871 result = PCI_POWERSTATE_UNKNOWN;
2875 /* No support, device is always at D0 */
2876 result = PCI_POWERSTATE_D0;
2882 * Some convenience functions for PCI device drivers.
2885 static __inline void
2886 pci_set_command_bit(device_t dev, device_t child, uint16_t bit)
2890 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2892 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2895 static __inline void
2896 pci_clear_command_bit(device_t dev, device_t child, uint16_t bit)
2900 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2902 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2906 pci_enable_busmaster_method(device_t dev, device_t child)
2908 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2913 pci_disable_busmaster_method(device_t dev, device_t child)
2915 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2920 pci_enable_io_method(device_t dev, device_t child, int space)
2925 case SYS_RES_IOPORT:
2926 bit = PCIM_CMD_PORTEN;
2928 case SYS_RES_MEMORY:
2929 bit = PCIM_CMD_MEMEN;
2934 pci_set_command_bit(dev, child, bit);
2939 pci_disable_io_method(device_t dev, device_t child, int space)
2944 case SYS_RES_IOPORT:
2945 bit = PCIM_CMD_PORTEN;
2947 case SYS_RES_MEMORY:
2948 bit = PCIM_CMD_MEMEN;
2953 pci_clear_command_bit(dev, child, bit);
2958 * New style pci driver. Parent device is either a pci-host-bridge or a
2959 * pci-pci-bridge. Both kinds are represented by instances of pcib.
2963 pci_print_verbose(struct pci_devinfo *dinfo)
2967 pcicfgregs *cfg = &dinfo->cfg;
2969 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n",
2970 cfg->vendor, cfg->device, cfg->revid);
2971 printf("\tdomain=%d, bus=%d, slot=%d, func=%d\n",
2972 cfg->domain, cfg->bus, cfg->slot, cfg->func);
2973 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n",
2974 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype,
2976 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n",
2977 cfg->cmdreg, cfg->statreg, cfg->cachelnsz);
2978 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n",
2979 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt,
2980 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250);
2981 if (cfg->intpin > 0)
2982 printf("\tintpin=%c, irq=%d\n",
2983 cfg->intpin +'a' -1, cfg->intline);
2984 if (cfg->pp.pp_cap) {
2987 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2);
2988 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n",
2989 cfg->pp.pp_cap & PCIM_PCAP_SPEC,
2990 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "",
2991 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "",
2992 status & PCIM_PSTAT_DMASK);
2994 if (cfg->msi.msi_location) {
2997 ctrl = cfg->msi.msi_ctrl;
2998 printf("\tMSI supports %d message%s%s%s\n",
2999 cfg->msi.msi_msgnum,
3000 (cfg->msi.msi_msgnum == 1) ? "" : "s",
3001 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "",
3002 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":"");
3004 if (cfg->msix.msix_location) {
3005 printf("\tMSI-X supports %d message%s ",
3006 cfg->msix.msix_msgnum,
3007 (cfg->msix.msix_msgnum == 1) ? "" : "s");
3008 if (cfg->msix.msix_table_bar == cfg->msix.msix_pba_bar)
3009 printf("in map 0x%x\n",
3010 cfg->msix.msix_table_bar);
3012 printf("in maps 0x%x and 0x%x\n",
3013 cfg->msix.msix_table_bar,
3014 cfg->msix.msix_pba_bar);
3020 pci_porten(device_t dev)
3022 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_PORTEN) != 0;
3026 pci_memen(device_t dev)
3028 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_MEMEN) != 0;
3032 pci_read_bar(device_t dev, int reg, pci_addr_t *mapp, pci_addr_t *testvalp,
3035 struct pci_devinfo *dinfo;
3036 pci_addr_t map, testval;
3041 * The device ROM BAR is special. It is always a 32-bit
3042 * memory BAR. Bit 0 is special and should not be set when
3045 dinfo = device_get_ivars(dev);
3046 if (PCIR_IS_BIOS(&dinfo->cfg, reg)) {
3047 map = pci_read_config(dev, reg, 4);
3048 pci_write_config(dev, reg, 0xfffffffe, 4);
3049 testval = pci_read_config(dev, reg, 4);
3050 pci_write_config(dev, reg, map, 4);
3052 *testvalp = testval;
3058 map = pci_read_config(dev, reg, 4);
3059 ln2range = pci_maprange(map);
3061 map |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3064 * Disable decoding via the command register before
3065 * determining the BAR's length since we will be placing it in
3068 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3069 pci_write_config(dev, PCIR_COMMAND,
3070 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
3073 * Determine the BAR's length by writing all 1's. The bottom
3074 * log_2(size) bits of the BAR will stick as 0 when we read
3077 * NB: according to the PCI Local Bus Specification, rev. 3.0:
3078 * "Software writes 0FFFFFFFFh to both registers, reads them back,
3079 * and combines the result into a 64-bit value." (section 6.2.5.1)
3081 * Writes to both registers must be performed before attempting to
3082 * read back the size value.
3085 pci_write_config(dev, reg, 0xffffffff, 4);
3086 if (ln2range == 64) {
3087 pci_write_config(dev, reg + 4, 0xffffffff, 4);
3088 testval |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3090 testval |= pci_read_config(dev, reg, 4);
3093 * Restore the original value of the BAR. We may have reprogrammed
3094 * the BAR of the low-level console device and when booting verbose,
3095 * we need the console device addressable.
3097 pci_write_config(dev, reg, map, 4);
3099 pci_write_config(dev, reg + 4, map >> 32, 4);
3100 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3103 *testvalp = testval;
3105 *bar64 = (ln2range == 64);
3109 pci_write_bar(device_t dev, struct pci_map *pm, pci_addr_t base)
3111 struct pci_devinfo *dinfo;
3114 /* The device ROM BAR is always a 32-bit memory BAR. */
3115 dinfo = device_get_ivars(dev);
3116 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3119 ln2range = pci_maprange(pm->pm_value);
3120 pci_write_config(dev, pm->pm_reg, base, 4);
3122 pci_write_config(dev, pm->pm_reg + 4, base >> 32, 4);
3123 pm->pm_value = pci_read_config(dev, pm->pm_reg, 4);
3125 pm->pm_value |= (pci_addr_t)pci_read_config(dev,
3126 pm->pm_reg + 4, 4) << 32;
3130 pci_find_bar(device_t dev, int reg)
3132 struct pci_devinfo *dinfo;
3135 dinfo = device_get_ivars(dev);
3136 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3137 if (pm->pm_reg == reg)
3144 pci_bar_enabled(device_t dev, struct pci_map *pm)
3146 struct pci_devinfo *dinfo;
3149 dinfo = device_get_ivars(dev);
3150 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) &&
3151 !(pm->pm_value & PCIM_BIOS_ENABLE))
3153 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3154 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) || PCI_BAR_MEM(pm->pm_value))
3155 return ((cmd & PCIM_CMD_MEMEN) != 0);
3157 return ((cmd & PCIM_CMD_PORTEN) != 0);
3161 pci_add_bar(device_t dev, int reg, pci_addr_t value, pci_addr_t size)
3163 struct pci_devinfo *dinfo;
3164 struct pci_map *pm, *prev;
3166 dinfo = device_get_ivars(dev);
3167 pm = malloc(sizeof(*pm), M_DEVBUF, M_WAITOK | M_ZERO);
3169 pm->pm_value = value;
3171 STAILQ_FOREACH(prev, &dinfo->cfg.maps, pm_link) {
3172 KASSERT(prev->pm_reg != pm->pm_reg, ("duplicate map %02x",
3174 if (STAILQ_NEXT(prev, pm_link) == NULL ||
3175 STAILQ_NEXT(prev, pm_link)->pm_reg > pm->pm_reg)
3179 STAILQ_INSERT_AFTER(&dinfo->cfg.maps, prev, pm, pm_link);
3181 STAILQ_INSERT_TAIL(&dinfo->cfg.maps, pm, pm_link);
3186 pci_restore_bars(device_t dev)
3188 struct pci_devinfo *dinfo;
3192 dinfo = device_get_ivars(dev);
3193 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3194 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3197 ln2range = pci_maprange(pm->pm_value);
3198 pci_write_config(dev, pm->pm_reg, pm->pm_value, 4);
3200 pci_write_config(dev, pm->pm_reg + 4,
3201 pm->pm_value >> 32, 4);
3206 * Add a resource based on a pci map register. Return 1 if the map
3207 * register is a 32bit map register or 2 if it is a 64bit register.
3210 pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl,
3211 int force, int prefetch)
3214 pci_addr_t base, map, testval;
3215 pci_addr_t start, end, count;
3216 int barlen, basezero, flags, maprange, mapsize, type;
3218 struct resource *res;
3221 * The BAR may already exist if the device is a CardBus card
3222 * whose CIS is stored in this BAR.
3224 pm = pci_find_bar(dev, reg);
3226 maprange = pci_maprange(pm->pm_value);
3227 barlen = maprange == 64 ? 2 : 1;
3231 pci_read_bar(dev, reg, &map, &testval, NULL);
3232 if (PCI_BAR_MEM(map)) {
3233 type = SYS_RES_MEMORY;
3234 if (map & PCIM_BAR_MEM_PREFETCH)
3237 type = SYS_RES_IOPORT;
3238 mapsize = pci_mapsize(testval);
3239 base = pci_mapbase(map);
3240 #ifdef __PCI_BAR_ZERO_VALID
3243 basezero = base == 0;
3245 maprange = pci_maprange(map);
3246 barlen = maprange == 64 ? 2 : 1;
3249 * For I/O registers, if bottom bit is set, and the next bit up
3250 * isn't clear, we know we have a BAR that doesn't conform to the
3251 * spec, so ignore it. Also, sanity check the size of the data
3252 * areas to the type of memory involved. Memory must be at least
3253 * 16 bytes in size, while I/O ranges must be at least 4.
3255 if (PCI_BAR_IO(testval) && (testval & PCIM_BAR_IO_RESERVED) != 0)
3257 if ((type == SYS_RES_MEMORY && mapsize < 4) ||
3258 (type == SYS_RES_IOPORT && mapsize < 2))
3261 /* Save a record of this BAR. */
3262 pm = pci_add_bar(dev, reg, map, mapsize);
3264 printf("\tmap[%02x]: type %s, range %2d, base %#jx, size %2d",
3265 reg, pci_maptype(map), maprange, (uintmax_t)base, mapsize);
3266 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3267 printf(", port disabled\n");
3268 else if (type == SYS_RES_MEMORY && !pci_memen(dev))
3269 printf(", memory disabled\n");
3271 printf(", enabled\n");
3275 * If base is 0, then we have problems if this architecture does
3276 * not allow that. It is best to ignore such entries for the
3277 * moment. These will be allocated later if the driver specifically
3278 * requests them. However, some removable buses look better when
3279 * all resources are allocated, so allow '0' to be overriden.
3281 * Similarly treat maps whose values is the same as the test value
3282 * read back. These maps have had all f's written to them by the
3283 * BIOS in an attempt to disable the resources.
3285 if (!force && (basezero || map == testval))
3287 if ((u_long)base != base) {
3289 "pci%d:%d:%d:%d bar %#x too many address bits",
3290 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev),
3291 pci_get_function(dev), reg);
3296 * This code theoretically does the right thing, but has
3297 * undesirable side effects in some cases where peripherals
3298 * respond oddly to having these bits enabled. Let the user
3299 * be able to turn them off (since pci_enable_io_modes is 1 by
3302 if (pci_enable_io_modes) {
3303 /* Turn on resources that have been left off by a lazy BIOS */
3304 if (type == SYS_RES_IOPORT && !pci_porten(dev)) {
3305 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3306 cmd |= PCIM_CMD_PORTEN;
3307 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3309 if (type == SYS_RES_MEMORY && !pci_memen(dev)) {
3310 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3311 cmd |= PCIM_CMD_MEMEN;
3312 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3315 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3317 if (type == SYS_RES_MEMORY && !pci_memen(dev))
3321 count = (pci_addr_t)1 << mapsize;
3322 flags = RF_ALIGNMENT_LOG2(mapsize);
3324 flags |= RF_PREFETCHABLE;
3325 if (basezero || base == pci_mapbase(testval) || pci_clear_bars) {
3326 start = 0; /* Let the parent decide. */
3330 end = base + count - 1;
3332 resource_list_add(rl, type, reg, start, end, count);
3335 * Try to allocate the resource for this BAR from our parent
3336 * so that this resource range is already reserved. The
3337 * driver for this device will later inherit this resource in
3338 * pci_alloc_resource().
3340 res = resource_list_reserve(rl, bus, dev, type, ®, start, end, count,
3342 if ((pci_do_realloc_bars
3343 || pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_REALLOC_BAR))
3344 && res == NULL && (start != 0 || end != ~0)) {
3346 * If the allocation fails, try to allocate a resource for
3347 * this BAR using any available range. The firmware felt
3348 * it was important enough to assign a resource, so don't
3349 * disable decoding if we can help it.
3351 resource_list_delete(rl, type, reg);
3352 resource_list_add(rl, type, reg, 0, ~0, count);
3353 res = resource_list_reserve(rl, bus, dev, type, ®, 0, ~0,
3358 * If the allocation fails, delete the resource list entry
3359 * and disable decoding for this device.
3361 * If the driver requests this resource in the future,
3362 * pci_reserve_map() will try to allocate a fresh
3365 resource_list_delete(rl, type, reg);
3366 pci_disable_io(dev, type);
3369 "pci%d:%d:%d:%d bar %#x failed to allocate\n",
3370 pci_get_domain(dev), pci_get_bus(dev),
3371 pci_get_slot(dev), pci_get_function(dev), reg);
3373 start = rman_get_start(res);
3374 pci_write_bar(dev, pm, start);
3380 * For ATA devices we need to decide early what addressing mode to use.
3381 * Legacy demands that the primary and secondary ATA ports sits on the
3382 * same addresses that old ISA hardware did. This dictates that we use
3383 * those addresses and ignore the BAR's if we cannot set PCI native
3387 pci_ata_maps(device_t bus, device_t dev, struct resource_list *rl, int force,
3388 uint32_t prefetchmask)
3390 int rid, type, progif;
3392 /* if this device supports PCI native addressing use it */
3393 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3394 if ((progif & 0x8a) == 0x8a) {
3395 if (pci_mapbase(pci_read_config(dev, PCIR_BAR(0), 4)) &&
3396 pci_mapbase(pci_read_config(dev, PCIR_BAR(2), 4))) {
3397 printf("Trying ATA native PCI addressing mode\n");
3398 pci_write_config(dev, PCIR_PROGIF, progif | 0x05, 1);
3402 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3403 type = SYS_RES_IOPORT;
3404 if (progif & PCIP_STORAGE_IDE_MODEPRIM) {
3405 pci_add_map(bus, dev, PCIR_BAR(0), rl, force,
3406 prefetchmask & (1 << 0));
3407 pci_add_map(bus, dev, PCIR_BAR(1), rl, force,
3408 prefetchmask & (1 << 1));
3411 resource_list_add(rl, type, rid, 0x1f0, 0x1f7, 8);
3412 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x1f0,
3415 resource_list_add(rl, type, rid, 0x3f6, 0x3f6, 1);
3416 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x3f6,
3419 if (progif & PCIP_STORAGE_IDE_MODESEC) {
3420 pci_add_map(bus, dev, PCIR_BAR(2), rl, force,
3421 prefetchmask & (1 << 2));
3422 pci_add_map(bus, dev, PCIR_BAR(3), rl, force,
3423 prefetchmask & (1 << 3));
3426 resource_list_add(rl, type, rid, 0x170, 0x177, 8);
3427 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x170,
3430 resource_list_add(rl, type, rid, 0x376, 0x376, 1);
3431 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x376,
3434 pci_add_map(bus, dev, PCIR_BAR(4), rl, force,
3435 prefetchmask & (1 << 4));
3436 pci_add_map(bus, dev, PCIR_BAR(5), rl, force,
3437 prefetchmask & (1 << 5));
3441 pci_assign_interrupt(device_t bus, device_t dev, int force_route)
3443 struct pci_devinfo *dinfo = device_get_ivars(dev);
3444 pcicfgregs *cfg = &dinfo->cfg;
3445 char tunable_name[64];
3448 /* Has to have an intpin to have an interrupt. */
3449 if (cfg->intpin == 0)
3452 /* Let the user override the IRQ with a tunable. */
3453 irq = PCI_INVALID_IRQ;
3454 snprintf(tunable_name, sizeof(tunable_name),
3455 "hw.pci%d.%d.%d.INT%c.irq",
3456 cfg->domain, cfg->bus, cfg->slot, cfg->intpin + 'A' - 1);
3457 if (TUNABLE_INT_FETCH(tunable_name, &irq) && (irq >= 255 || irq <= 0))
3458 irq = PCI_INVALID_IRQ;
3461 * If we didn't get an IRQ via the tunable, then we either use the
3462 * IRQ value in the intline register or we ask the bus to route an
3463 * interrupt for us. If force_route is true, then we only use the
3464 * value in the intline register if the bus was unable to assign an
3467 if (!PCI_INTERRUPT_VALID(irq)) {
3468 if (!PCI_INTERRUPT_VALID(cfg->intline) || force_route)
3469 irq = PCI_ASSIGN_INTERRUPT(bus, dev);
3470 if (!PCI_INTERRUPT_VALID(irq))
3474 /* If after all that we don't have an IRQ, just bail. */
3475 if (!PCI_INTERRUPT_VALID(irq))
3478 /* Update the config register if it changed. */
3479 if (irq != cfg->intline) {
3481 pci_write_config(dev, PCIR_INTLINE, irq, 1);
3484 /* Add this IRQ as rid 0 interrupt resource. */
3485 resource_list_add(&dinfo->resources, SYS_RES_IRQ, 0, irq, irq, 1);
3488 /* Perform early OHCI takeover from SMM. */
3490 ohci_early_takeover(device_t self)
3492 struct resource *res;
3498 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3502 ctl = bus_read_4(res, OHCI_CONTROL);
3503 if (ctl & OHCI_IR) {
3505 printf("ohci early: "
3506 "SMM active, request owner change\n");
3507 bus_write_4(res, OHCI_COMMAND_STATUS, OHCI_OCR);
3508 for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) {
3510 ctl = bus_read_4(res, OHCI_CONTROL);
3512 if (ctl & OHCI_IR) {
3514 printf("ohci early: "
3515 "SMM does not respond, resetting\n");
3516 bus_write_4(res, OHCI_CONTROL, OHCI_HCFS_RESET);
3518 /* Disable interrupts */
3519 bus_write_4(res, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS);
3522 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3525 /* Perform early UHCI takeover from SMM. */
3527 uhci_early_takeover(device_t self)
3529 struct resource *res;
3533 * Set the PIRQD enable bit and switch off all the others. We don't
3534 * want legacy support to interfere with us XXX Does this also mean
3535 * that the BIOS won't touch the keyboard anymore if it is connected
3536 * to the ports of the root hub?
3538 pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2);
3540 /* Disable interrupts */
3541 rid = PCI_UHCI_BASE_REG;
3542 res = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE);
3544 bus_write_2(res, UHCI_INTR, 0);
3545 bus_release_resource(self, SYS_RES_IOPORT, rid, res);
3549 /* Perform early EHCI takeover from SMM. */
3551 ehci_early_takeover(device_t self)
3553 struct resource *res;
3563 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3567 cparams = bus_read_4(res, EHCI_HCCPARAMS);
3569 /* Synchronise with the BIOS if it owns the controller. */
3570 for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
3571 eecp = EHCI_EECP_NEXT(eec)) {
3572 eec = pci_read_config(self, eecp, 4);
3573 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
3576 bios_sem = pci_read_config(self, eecp +
3577 EHCI_LEGSUP_BIOS_SEM, 1);
3578 if (bios_sem == 0) {
3582 printf("ehci early: "
3583 "SMM active, request owner change\n");
3585 pci_write_config(self, eecp + EHCI_LEGSUP_OS_SEM, 1, 1);
3587 for (i = 0; (i < 100) && (bios_sem != 0); i++) {
3589 bios_sem = pci_read_config(self, eecp +
3590 EHCI_LEGSUP_BIOS_SEM, 1);
3593 if (bios_sem != 0) {
3595 printf("ehci early: "
3596 "SMM does not respond\n");
3598 /* Disable interrupts */
3599 offs = EHCI_CAPLENGTH(bus_read_4(res, EHCI_CAPLEN_HCIVERSION));
3600 bus_write_4(res, offs + EHCI_USBINTR, 0);
3602 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3605 /* Perform early XHCI takeover from SMM. */
3607 xhci_early_takeover(device_t self)
3609 struct resource *res;
3619 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3623 cparams = bus_read_4(res, XHCI_HCSPARAMS0);
3627 /* Synchronise with the BIOS if it owns the controller. */
3628 for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
3629 eecp += XHCI_XECP_NEXT(eec) << 2) {
3630 eec = bus_read_4(res, eecp);
3632 if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
3635 bios_sem = bus_read_1(res, eecp + XHCI_XECP_BIOS_SEM);
3640 printf("xhci early: "
3641 "SMM active, request owner change\n");
3643 bus_write_1(res, eecp + XHCI_XECP_OS_SEM, 1);
3645 /* wait a maximum of 5 second */
3647 for (i = 0; (i < 5000) && (bios_sem != 0); i++) {
3649 bios_sem = bus_read_1(res, eecp +
3650 XHCI_XECP_BIOS_SEM);
3653 if (bios_sem != 0) {
3655 printf("xhci early: "
3656 "SMM does not respond\n");
3659 /* Disable interrupts */
3660 offs = bus_read_1(res, XHCI_CAPLENGTH);
3661 bus_write_4(res, offs + XHCI_USBCMD, 0);
3662 bus_read_4(res, offs + XHCI_USBSTS);
3664 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3667 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
3669 pci_reserve_secbus(device_t bus, device_t dev, pcicfgregs *cfg,
3670 struct resource_list *rl)
3672 struct resource *res;
3674 rman_res_t start, end, count;
3675 int rid, sec_bus, sec_reg, sub_bus, sub_reg, sup_bus;
3677 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3678 case PCIM_HDRTYPE_BRIDGE:
3679 sec_reg = PCIR_SECBUS_1;
3680 sub_reg = PCIR_SUBBUS_1;
3682 case PCIM_HDRTYPE_CARDBUS:
3683 sec_reg = PCIR_SECBUS_2;
3684 sub_reg = PCIR_SUBBUS_2;
3691 * If the existing bus range is valid, attempt to reserve it
3692 * from our parent. If this fails for any reason, clear the
3693 * secbus and subbus registers.
3695 * XXX: Should we reset sub_bus to sec_bus if it is < sec_bus?
3696 * This would at least preserve the existing sec_bus if it is
3699 sec_bus = PCI_READ_CONFIG(bus, dev, sec_reg, 1);
3700 sub_bus = PCI_READ_CONFIG(bus, dev, sub_reg, 1);
3702 /* Quirk handling. */
3703 switch (pci_get_devid(dev)) {
3704 case 0x12258086: /* Intel 82454KX/GX (Orion) */
3705 sup_bus = pci_read_config(dev, 0x41, 1);
3706 if (sup_bus != 0xff) {
3707 sec_bus = sup_bus + 1;
3708 sub_bus = sup_bus + 1;
3709 PCI_WRITE_CONFIG(bus, dev, sec_reg, sec_bus, 1);
3710 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3715 /* Compaq R3000 BIOS sets wrong subordinate bus number. */
3716 if ((cp = kern_getenv("smbios.planar.maker")) == NULL)
3718 if (strncmp(cp, "Compal", 6) != 0) {
3723 if ((cp = kern_getenv("smbios.planar.product")) == NULL)
3725 if (strncmp(cp, "08A0", 4) != 0) {
3730 if (sub_bus < 0xa) {
3732 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3738 printf("\tsecbus=%d, subbus=%d\n", sec_bus, sub_bus);
3739 if (sec_bus > 0 && sub_bus >= sec_bus) {
3742 count = end - start + 1;
3744 resource_list_add(rl, PCI_RES_BUS, 0, 0, ~0, count);
3747 * If requested, clear secondary bus registers in
3748 * bridge devices to force a complete renumbering
3749 * rather than reserving the existing range. However,
3750 * preserve the existing size.
3752 if (pci_clear_buses)
3756 res = resource_list_reserve(rl, bus, dev, PCI_RES_BUS, &rid,
3757 start, end, count, 0);
3763 "pci%d:%d:%d:%d secbus failed to allocate\n",
3764 pci_get_domain(dev), pci_get_bus(dev),
3765 pci_get_slot(dev), pci_get_function(dev));
3769 PCI_WRITE_CONFIG(bus, dev, sec_reg, 0, 1);
3770 PCI_WRITE_CONFIG(bus, dev, sub_reg, 0, 1);
3773 static struct resource *
3774 pci_alloc_secbus(device_t dev, device_t child, int *rid, rman_res_t start,
3775 rman_res_t end, rman_res_t count, u_int flags)
3777 struct pci_devinfo *dinfo;
3779 struct resource_list *rl;
3780 struct resource *res;
3781 int sec_reg, sub_reg;
3783 dinfo = device_get_ivars(child);
3785 rl = &dinfo->resources;
3786 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3787 case PCIM_HDRTYPE_BRIDGE:
3788 sec_reg = PCIR_SECBUS_1;
3789 sub_reg = PCIR_SUBBUS_1;
3791 case PCIM_HDRTYPE_CARDBUS:
3792 sec_reg = PCIR_SECBUS_2;
3793 sub_reg = PCIR_SUBBUS_2;
3802 if (resource_list_find(rl, PCI_RES_BUS, *rid) == NULL)
3803 resource_list_add(rl, PCI_RES_BUS, *rid, start, end, count);
3804 if (!resource_list_reserved(rl, PCI_RES_BUS, *rid)) {
3805 res = resource_list_reserve(rl, dev, child, PCI_RES_BUS, rid,
3806 start, end, count, flags & ~RF_ACTIVE);
3808 resource_list_delete(rl, PCI_RES_BUS, *rid);
3809 device_printf(child, "allocating %ju bus%s failed\n",
3810 count, count == 1 ? "" : "es");
3814 device_printf(child,
3815 "Lazy allocation of %ju bus%s at %ju\n", count,
3816 count == 1 ? "" : "es", rman_get_start(res));
3817 PCI_WRITE_CONFIG(dev, child, sec_reg, rman_get_start(res), 1);
3818 PCI_WRITE_CONFIG(dev, child, sub_reg, rman_get_end(res), 1);
3820 return (resource_list_alloc(rl, dev, child, PCI_RES_BUS, rid, start,
3821 end, count, flags));
3826 pci_ea_bei_to_rid(device_t dev, int bei)
3829 struct pci_devinfo *dinfo;
3831 struct pcicfg_iov *iov;
3833 dinfo = device_get_ivars(dev);
3834 iov = dinfo->cfg.iov;
3836 iov_pos = iov->iov_pos;
3841 /* Check if matches BAR */
3842 if ((bei >= PCIM_EA_BEI_BAR_0) &&
3843 (bei <= PCIM_EA_BEI_BAR_5))
3844 return (PCIR_BAR(bei));
3847 if (bei == PCIM_EA_BEI_ROM)
3851 /* Check if matches VF_BAR */
3852 if ((iov != NULL) && (bei >= PCIM_EA_BEI_VF_BAR_0) &&
3853 (bei <= PCIM_EA_BEI_VF_BAR_5))
3854 return (PCIR_SRIOV_BAR(bei - PCIM_EA_BEI_VF_BAR_0) +
3862 pci_ea_is_enabled(device_t dev, int rid)
3864 struct pci_ea_entry *ea;
3865 struct pci_devinfo *dinfo;
3867 dinfo = device_get_ivars(dev);
3869 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3870 if (pci_ea_bei_to_rid(dev, ea->eae_bei) == rid)
3871 return ((ea->eae_flags & PCIM_EA_ENABLE) > 0);
3878 pci_add_resources_ea(device_t bus, device_t dev, int alloc_iov)
3880 struct pci_ea_entry *ea;
3881 struct pci_devinfo *dinfo;
3882 pci_addr_t start, end, count;
3883 struct resource_list *rl;
3884 int type, flags, rid;
3885 struct resource *res;
3888 struct pcicfg_iov *iov;
3891 dinfo = device_get_ivars(dev);
3892 rl = &dinfo->resources;
3896 iov = dinfo->cfg.iov;
3899 if (dinfo->cfg.ea.ea_location == 0)
3902 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3904 * TODO: Ignore EA-BAR if is not enabled.
3905 * Currently the EA implementation supports
3906 * only situation, where EA structure contains
3907 * predefined entries. In case they are not enabled
3908 * leave them unallocated and proceed with
3909 * a legacy-BAR mechanism.
3911 if ((ea->eae_flags & PCIM_EA_ENABLE) == 0)
3914 switch ((ea->eae_flags & PCIM_EA_PP) >> PCIM_EA_PP_OFFSET) {
3915 case PCIM_EA_P_MEM_PREFETCH:
3916 case PCIM_EA_P_VF_MEM_PREFETCH:
3917 flags = RF_PREFETCHABLE;
3919 case PCIM_EA_P_VF_MEM:
3921 type = SYS_RES_MEMORY;
3924 type = SYS_RES_IOPORT;
3930 if (alloc_iov != 0) {
3932 /* Allocating IOV, confirm BEI matches */
3933 if ((ea->eae_bei < PCIM_EA_BEI_VF_BAR_0) ||
3934 (ea->eae_bei > PCIM_EA_BEI_VF_BAR_5))
3940 /* Allocating BAR, confirm BEI matches */
3941 if (((ea->eae_bei < PCIM_EA_BEI_BAR_0) ||
3942 (ea->eae_bei > PCIM_EA_BEI_BAR_5)) &&
3943 (ea->eae_bei != PCIM_EA_BEI_ROM))
3947 rid = pci_ea_bei_to_rid(dev, ea->eae_bei);
3951 /* Skip resources already allocated by EA */
3952 if ((resource_list_find(rl, SYS_RES_MEMORY, rid) != NULL) ||
3953 (resource_list_find(rl, SYS_RES_IOPORT, rid) != NULL))
3956 start = ea->eae_base;
3957 count = ea->eae_max_offset + 1;
3960 count = count * iov->iov_num_vfs;
3962 end = start + count - 1;
3966 resource_list_add(rl, type, rid, start, end, count);
3967 res = resource_list_reserve(rl, bus, dev, type, &rid, start, end, count,
3970 resource_list_delete(rl, type, rid);
3973 * Failed to allocate using EA, disable entry.
3974 * Another attempt to allocation will be performed
3975 * further, but this time using legacy BAR registers
3977 tmp = pci_read_config(dev, ea->eae_cfg_offset, 4);
3978 tmp &= ~PCIM_EA_ENABLE;
3979 pci_write_config(dev, ea->eae_cfg_offset, tmp, 4);
3982 * Disabling entry might fail in case it is hardwired.
3983 * Read flags again to match current status.
3985 ea->eae_flags = pci_read_config(dev, ea->eae_cfg_offset, 4);
3990 /* As per specification, fill BAR with zeros */
3991 pci_write_config(dev, rid, 0, 4);
3996 pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask)
3998 struct pci_devinfo *dinfo;
4000 struct resource_list *rl;
4001 const struct pci_quirk *q;
4005 dinfo = device_get_ivars(dev);
4007 rl = &dinfo->resources;
4008 devid = (cfg->device << 16) | cfg->vendor;
4010 /* Allocate resources using Enhanced Allocation */
4011 pci_add_resources_ea(bus, dev, 0);
4013 /* ATA devices needs special map treatment */
4014 if ((pci_get_class(dev) == PCIC_STORAGE) &&
4015 (pci_get_subclass(dev) == PCIS_STORAGE_IDE) &&
4016 ((pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) ||
4017 (!pci_read_config(dev, PCIR_BAR(0), 4) &&
4018 !pci_read_config(dev, PCIR_BAR(2), 4))) )
4019 pci_ata_maps(bus, dev, rl, force, prefetchmask);
4021 for (i = 0; i < cfg->nummaps;) {
4022 /* Skip resources already managed by EA */
4023 if ((resource_list_find(rl, SYS_RES_MEMORY, PCIR_BAR(i)) != NULL) ||
4024 (resource_list_find(rl, SYS_RES_IOPORT, PCIR_BAR(i)) != NULL) ||
4025 pci_ea_is_enabled(dev, PCIR_BAR(i))) {
4031 * Skip quirked resources.
4033 for (q = &pci_quirks[0]; q->devid != 0; q++)
4034 if (q->devid == devid &&
4035 q->type == PCI_QUIRK_UNMAP_REG &&
4036 q->arg1 == PCIR_BAR(i))
4038 if (q->devid != 0) {
4042 i += pci_add_map(bus, dev, PCIR_BAR(i), rl, force,
4043 prefetchmask & (1 << i));
4047 * Add additional, quirked resources.
4049 for (q = &pci_quirks[0]; q->devid != 0; q++)
4050 if (q->devid == devid && q->type == PCI_QUIRK_MAP_REG)
4051 pci_add_map(bus, dev, q->arg1, rl, force, 0);
4053 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) {
4054 #ifdef __PCI_REROUTE_INTERRUPT
4056 * Try to re-route interrupts. Sometimes the BIOS or
4057 * firmware may leave bogus values in these registers.
4058 * If the re-route fails, then just stick with what we
4061 pci_assign_interrupt(bus, dev, 1);
4063 pci_assign_interrupt(bus, dev, 0);
4067 if (pci_usb_takeover && pci_get_class(dev) == PCIC_SERIALBUS &&
4068 pci_get_subclass(dev) == PCIS_SERIALBUS_USB) {
4069 if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_XHCI)
4070 xhci_early_takeover(dev);
4071 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_EHCI)
4072 ehci_early_takeover(dev);
4073 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_OHCI)
4074 ohci_early_takeover(dev);
4075 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI)
4076 uhci_early_takeover(dev);
4079 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
4081 * Reserve resources for secondary bus ranges behind bridge
4084 pci_reserve_secbus(bus, dev, cfg, rl);
4088 static struct pci_devinfo *
4089 pci_identify_function(device_t pcib, device_t dev, int domain, int busno,
4092 struct pci_devinfo *dinfo;
4094 dinfo = pci_read_device(pcib, dev, domain, busno, slot, func);
4096 pci_add_child(dev, dinfo);
4102 pci_add_children(device_t dev, int domain, int busno)
4104 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4105 device_t pcib = device_get_parent(dev);
4106 struct pci_devinfo *dinfo;
4108 int s, f, pcifunchigh;
4113 * Try to detect a device at slot 0, function 0. If it exists, try to
4114 * enable ARI. We must enable ARI before detecting the rest of the
4115 * functions on this bus as ARI changes the set of slots and functions
4116 * that are legal on this bus.
4118 dinfo = pci_identify_function(pcib, dev, domain, busno, 0, 0);
4119 if (dinfo != NULL && pci_enable_ari)
4120 PCIB_TRY_ENABLE_ARI(pcib, dinfo->cfg.dev);
4123 * Start looking for new devices on slot 0 at function 1 because we
4124 * just identified the device at slot 0, function 0.
4128 maxslots = PCIB_MAXSLOTS(pcib);
4129 for (s = 0; s <= maxslots; s++, first_func = 0) {
4133 hdrtype = REG(PCIR_HDRTYPE, 1);
4134 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4136 if (hdrtype & PCIM_MFDEV)
4137 pcifunchigh = PCIB_MAXFUNCS(pcib);
4138 for (f = first_func; f <= pcifunchigh; f++)
4139 pci_identify_function(pcib, dev, domain, busno, s, f);
4145 pci_rescan_method(device_t dev)
4147 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4148 device_t pcib = device_get_parent(dev);
4149 device_t child, *devlist, *unchanged;
4150 int devcount, error, i, j, maxslots, oldcount;
4151 int busno, domain, s, f, pcifunchigh;
4154 /* No need to check for ARI on a rescan. */
4155 error = device_get_children(dev, &devlist, &devcount);
4158 if (devcount != 0) {
4159 unchanged = malloc(devcount * sizeof(device_t), M_TEMP,
4161 if (unchanged == NULL) {
4162 free(devlist, M_TEMP);
4168 domain = pcib_get_domain(dev);
4169 busno = pcib_get_bus(dev);
4170 maxslots = PCIB_MAXSLOTS(pcib);
4171 for (s = 0; s <= maxslots; s++) {
4172 /* If function 0 is not present, skip to the next slot. */
4174 if (REG(PCIR_VENDOR, 2) == 0xffff)
4177 hdrtype = REG(PCIR_HDRTYPE, 1);
4178 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4180 if (hdrtype & PCIM_MFDEV)
4181 pcifunchigh = PCIB_MAXFUNCS(pcib);
4182 for (f = 0; f <= pcifunchigh; f++) {
4183 if (REG(PCIR_VENDOR, 2) == 0xffff)
4187 * Found a valid function. Check if a
4188 * device_t for this device already exists.
4190 for (i = 0; i < devcount; i++) {
4194 if (pci_get_slot(child) == s &&
4195 pci_get_function(child) == f) {
4196 unchanged[i] = child;
4201 pci_identify_function(pcib, dev, domain, busno, s, f);
4206 /* Remove devices that are no longer present. */
4207 for (i = 0; i < devcount; i++) {
4208 if (unchanged[i] != NULL)
4210 device_delete_child(dev, devlist[i]);
4213 free(devlist, M_TEMP);
4214 oldcount = devcount;
4216 /* Try to attach the devices just added. */
4217 error = device_get_children(dev, &devlist, &devcount);
4219 free(unchanged, M_TEMP);
4223 for (i = 0; i < devcount; i++) {
4224 for (j = 0; j < oldcount; j++) {
4225 if (devlist[i] == unchanged[j])
4229 device_probe_and_attach(devlist[i]);
4233 free(unchanged, M_TEMP);
4234 free(devlist, M_TEMP);
4241 pci_add_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
4244 struct pci_devinfo *vf_dinfo;
4246 int busno, slot, func;
4248 pcib = device_get_parent(bus);
4250 PCIB_DECODE_RID(pcib, rid, &busno, &slot, &func);
4252 vf_dinfo = pci_fill_devinfo(pcib, bus, pci_get_domain(pcib), busno,
4253 slot, func, vid, did);
4255 vf_dinfo->cfg.flags |= PCICFG_VF;
4256 pci_add_child(bus, vf_dinfo);
4258 return (vf_dinfo->cfg.dev);
4262 pci_create_iov_child_method(device_t bus, device_t pf, uint16_t rid,
4263 uint16_t vid, uint16_t did)
4266 return (pci_add_iov_child(bus, pf, rid, vid, did));
4271 * For PCIe device set Max_Payload_Size to match PCIe root's.
4274 pcie_setup_mps(device_t dev)
4276 struct pci_devinfo *dinfo = device_get_ivars(dev);
4278 uint16_t rmps, mmps, mps;
4280 if (dinfo->cfg.pcie.pcie_location == 0)
4282 root = pci_find_pcie_root_port(dev);
4285 /* Check whether the MPS is already configured. */
4286 rmps = pcie_read_config(root, PCIER_DEVICE_CTL, 2) &
4287 PCIEM_CTL_MAX_PAYLOAD;
4288 mps = pcie_read_config(dev, PCIER_DEVICE_CTL, 2) &
4289 PCIEM_CTL_MAX_PAYLOAD;
4292 /* Check whether the device is capable of the root's MPS. */
4293 mmps = (pcie_read_config(dev, PCIER_DEVICE_CAP, 2) &
4294 PCIEM_CAP_MAX_PAYLOAD) << 5;
4297 * The device is unable to handle root's MPS. Limit root.
4298 * XXX: We should traverse through all the tree, applying
4299 * it to all the devices.
4301 pcie_adjust_config(root, PCIER_DEVICE_CTL,
4302 PCIEM_CTL_MAX_PAYLOAD, mmps, 2);
4304 pcie_adjust_config(dev, PCIER_DEVICE_CTL,
4305 PCIEM_CTL_MAX_PAYLOAD, rmps, 2);
4310 pci_add_child_clear_aer(device_t dev, struct pci_devinfo *dinfo)
4316 if (dinfo->cfg.pcie.pcie_location != 0 &&
4317 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT) {
4318 r2 = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4320 r2 &= ~(PCIEM_ROOT_CTL_SERR_CORR |
4321 PCIEM_ROOT_CTL_SERR_NONFATAL | PCIEM_ROOT_CTL_SERR_FATAL);
4322 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4323 PCIER_ROOT_CTL, r2, 2);
4325 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
4326 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
4327 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
4328 if (r != 0 && bootverbose) {
4329 pci_printf(&dinfo->cfg,
4330 "clearing AER UC 0x%08x -> 0x%08x\n",
4331 r, pci_read_config(dev, aer + PCIR_AER_UC_STATUS,
4335 r = pci_read_config(dev, aer + PCIR_AER_UC_MASK, 4);
4336 r &= ~(PCIM_AER_UC_TRAINING_ERROR |
4337 PCIM_AER_UC_DL_PROTOCOL_ERROR |
4338 PCIM_AER_UC_SURPRISE_LINK_DOWN |
4339 PCIM_AER_UC_POISONED_TLP |
4340 PCIM_AER_UC_FC_PROTOCOL_ERROR |
4341 PCIM_AER_UC_COMPLETION_TIMEOUT |
4342 PCIM_AER_UC_COMPLETER_ABORT |
4343 PCIM_AER_UC_UNEXPECTED_COMPLETION |
4344 PCIM_AER_UC_RECEIVER_OVERFLOW |
4345 PCIM_AER_UC_MALFORMED_TLP |
4346 PCIM_AER_UC_ECRC_ERROR |
4347 PCIM_AER_UC_UNSUPPORTED_REQUEST |
4348 PCIM_AER_UC_ACS_VIOLATION |
4349 PCIM_AER_UC_INTERNAL_ERROR |
4350 PCIM_AER_UC_MC_BLOCKED_TLP |
4351 PCIM_AER_UC_ATOMIC_EGRESS_BLK |
4352 PCIM_AER_UC_TLP_PREFIX_BLOCKED);
4353 pci_write_config(dev, aer + PCIR_AER_UC_MASK, r, 4);
4355 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
4356 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
4357 if (r != 0 && bootverbose) {
4358 pci_printf(&dinfo->cfg,
4359 "clearing AER COR 0x%08x -> 0x%08x\n",
4360 r, pci_read_config(dev, aer + PCIR_AER_COR_STATUS,
4364 r = pci_read_config(dev, aer + PCIR_AER_COR_MASK, 4);
4365 r &= ~(PCIM_AER_COR_RECEIVER_ERROR |
4366 PCIM_AER_COR_BAD_TLP |
4367 PCIM_AER_COR_BAD_DLLP |
4368 PCIM_AER_COR_REPLAY_ROLLOVER |
4369 PCIM_AER_COR_REPLAY_TIMEOUT |
4370 PCIM_AER_COR_ADVISORY_NF_ERROR |
4371 PCIM_AER_COR_INTERNAL_ERROR |
4372 PCIM_AER_COR_HEADER_LOG_OVFLOW);
4373 pci_write_config(dev, aer + PCIR_AER_COR_MASK, r, 4);
4375 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4376 PCIER_DEVICE_CTL, 2);
4377 r |= PCIEM_CTL_COR_ENABLE | PCIEM_CTL_NFER_ENABLE |
4378 PCIEM_CTL_FER_ENABLE | PCIEM_CTL_URR_ENABLE;
4379 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4380 PCIER_DEVICE_CTL, r, 2);
4385 pci_add_child(device_t bus, struct pci_devinfo *dinfo)
4389 dinfo->cfg.dev = dev = device_add_child(bus, NULL, -1);
4390 device_set_ivars(dev, dinfo);
4391 resource_list_init(&dinfo->resources);
4392 pci_cfg_save(dev, dinfo, 0);
4393 pci_cfg_restore(dev, dinfo);
4394 pci_print_verbose(dinfo);
4395 pci_add_resources(bus, dev, 0, 0);
4396 pcie_setup_mps(dev);
4397 pci_child_added(dinfo->cfg.dev);
4399 if (pci_clear_aer_on_attach)
4400 pci_add_child_clear_aer(dev, dinfo);
4402 EVENTHANDLER_INVOKE(pci_add_device, dinfo->cfg.dev);
4406 pci_child_added_method(device_t dev, device_t child)
4412 pci_probe(device_t dev)
4415 device_set_desc(dev, "PCI bus");
4417 /* Allow other subclasses to override this driver. */
4418 return (BUS_PROBE_GENERIC);
4422 pci_attach_common(device_t dev)
4424 struct pci_softc *sc;
4430 sc = device_get_softc(dev);
4431 domain = pcib_get_domain(dev);
4432 busno = pcib_get_bus(dev);
4435 sc->sc_bus = bus_alloc_resource(dev, PCI_RES_BUS, &rid, busno, busno,
4437 if (sc->sc_bus == NULL) {
4438 device_printf(dev, "failed to allocate bus number\n");
4443 device_printf(dev, "domain=%d, physical bus=%d\n",
4445 sc->sc_dma_tag = bus_get_dma_tag(dev);
4450 pci_attach(device_t dev)
4452 int busno, domain, error;
4454 error = pci_attach_common(dev);
4459 * Since there can be multiple independently numbered PCI
4460 * buses on systems with multiple PCI domains, we can't use
4461 * the unit number to decide which bus we are probing. We ask
4462 * the parent pcib what our domain and bus numbers are.
4464 domain = pcib_get_domain(dev);
4465 busno = pcib_get_bus(dev);
4466 pci_add_children(dev, domain, busno);
4467 return (bus_generic_attach(dev));
4471 pci_detach(device_t dev)
4474 struct pci_softc *sc;
4478 error = bus_generic_detach(dev);
4482 sc = device_get_softc(dev);
4483 error = bus_release_resource(dev, PCI_RES_BUS, 0, sc->sc_bus);
4487 return (device_delete_children(dev));
4491 pci_hint_device_unit(device_t dev, device_t child, const char *name, int *unitp)
4495 char me1[24], me2[32];
4499 d = pci_get_domain(child);
4500 b = pci_get_bus(child);
4501 s = pci_get_slot(child);
4502 f = pci_get_function(child);
4503 snprintf(me1, sizeof(me1), "pci%u:%u:%u", b, s, f);
4504 snprintf(me2, sizeof(me2), "pci%u:%u:%u:%u", d, b, s, f);
4506 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) {
4507 resource_string_value(name, unit, "at", &at);
4508 if (strcmp(at, me1) != 0 && strcmp(at, me2) != 0)
4509 continue; /* No match, try next candidate */
4516 pci_set_power_child(device_t dev, device_t child, int state)
4522 * Set the device to the given state. If the firmware suggests
4523 * a different power state, use it instead. If power management
4524 * is not present, the firmware is responsible for managing
4525 * device power. Skip children who aren't attached since they
4526 * are handled separately.
4528 pcib = device_get_parent(dev);
4530 if (device_is_attached(child) &&
4531 PCIB_POWER_FOR_SLEEP(pcib, child, &dstate) == 0)
4532 pci_set_powerstate(child, dstate);
4536 pci_suspend_child(device_t dev, device_t child)
4538 struct pci_devinfo *dinfo;
4539 struct resource_list_entry *rle;
4542 dinfo = device_get_ivars(child);
4545 * Save the PCI configuration space for the child and set the
4546 * device in the appropriate power state for this sleep state.
4548 pci_cfg_save(child, dinfo, 0);
4550 /* Suspend devices before potentially powering them down. */
4551 error = bus_generic_suspend_child(dev, child);
4556 if (pci_do_power_suspend) {
4558 * Make sure this device's interrupt handler is not invoked
4559 * in the case the device uses a shared interrupt that can
4560 * be raised by some other device.
4561 * This is applicable only to regular (legacy) PCI interrupts
4562 * as MSI/MSI-X interrupts are never shared.
4564 rle = resource_list_find(&dinfo->resources,
4566 if (rle != NULL && rle->res != NULL)
4567 (void)bus_suspend_intr(child, rle->res);
4568 pci_set_power_child(dev, child, PCI_POWERSTATE_D3);
4575 pci_resume_child(device_t dev, device_t child)
4577 struct pci_devinfo *dinfo;
4578 struct resource_list_entry *rle;
4580 if (pci_do_power_resume)
4581 pci_set_power_child(dev, child, PCI_POWERSTATE_D0);
4583 dinfo = device_get_ivars(child);
4584 pci_cfg_restore(child, dinfo);
4585 if (!device_is_attached(child))
4586 pci_cfg_save(child, dinfo, 1);
4588 bus_generic_resume_child(dev, child);
4591 * Allow interrupts only after fully resuming the driver and hardware.
4593 if (pci_do_power_suspend) {
4594 /* See pci_suspend_child for details. */
4595 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
4596 if (rle != NULL && rle->res != NULL)
4597 (void)bus_resume_intr(child, rle->res);
4604 pci_resume(device_t dev)
4606 device_t child, *devlist;
4607 int error, i, numdevs;
4609 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0)
4613 * Resume critical devices first, then everything else later.
4615 for (i = 0; i < numdevs; i++) {
4617 switch (pci_get_class(child)) {
4621 case PCIC_BASEPERIPH:
4622 BUS_RESUME_CHILD(dev, child);
4626 for (i = 0; i < numdevs; i++) {
4628 switch (pci_get_class(child)) {
4632 case PCIC_BASEPERIPH:
4635 BUS_RESUME_CHILD(dev, child);
4638 free(devlist, M_TEMP);
4643 pci_load_vendor_data(void)
4649 data = preload_search_by_type("pci_vendor_data");
4651 ptr = preload_fetch_addr(data);
4652 sz = preload_fetch_size(data);
4653 if (ptr != NULL && sz != 0) {
4654 pci_vendordata = ptr;
4655 pci_vendordata_size = sz;
4656 /* terminate the database */
4657 pci_vendordata[pci_vendordata_size] = '\n';
4663 pci_driver_added(device_t dev, driver_t *driver)
4668 struct pci_devinfo *dinfo;
4672 device_printf(dev, "driver added\n");
4673 DEVICE_IDENTIFY(driver, dev);
4674 if (device_get_children(dev, &devlist, &numdevs) != 0)
4676 for (i = 0; i < numdevs; i++) {
4678 if (device_get_state(child) != DS_NOTPRESENT)
4680 dinfo = device_get_ivars(child);
4681 pci_print_verbose(dinfo);
4683 pci_printf(&dinfo->cfg, "reprobing on driver added\n");
4684 pci_cfg_restore(child, dinfo);
4685 if (device_probe_and_attach(child) != 0)
4686 pci_child_detached(dev, child);
4688 free(devlist, M_TEMP);
4692 pci_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
4693 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep)
4695 struct pci_devinfo *dinfo;
4696 struct msix_table_entry *mte;
4697 struct msix_vector *mv;
4703 error = bus_generic_setup_intr(dev, child, irq, flags, filter, intr,
4708 /* If this is not a direct child, just bail out. */
4709 if (device_get_parent(child) != dev) {
4714 rid = rman_get_rid(irq);
4716 /* Make sure that INTx is enabled */
4717 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4720 * Check to see if the interrupt is MSI or MSI-X.
4721 * Ask our parent to map the MSI and give
4722 * us the address and data register values.
4723 * If we fail for some reason, teardown the
4724 * interrupt handler.
4726 dinfo = device_get_ivars(child);
4727 if (dinfo->cfg.msi.msi_alloc > 0) {
4728 if (dinfo->cfg.msi.msi_addr == 0) {
4729 KASSERT(dinfo->cfg.msi.msi_handlers == 0,
4730 ("MSI has handlers, but vectors not mapped"));
4731 error = PCIB_MAP_MSI(device_get_parent(dev),
4732 child, rman_get_start(irq), &addr, &data);
4735 dinfo->cfg.msi.msi_addr = addr;
4736 dinfo->cfg.msi.msi_data = data;
4738 if (dinfo->cfg.msi.msi_handlers == 0)
4739 pci_enable_msi(child, dinfo->cfg.msi.msi_addr,
4740 dinfo->cfg.msi.msi_data);
4741 dinfo->cfg.msi.msi_handlers++;
4743 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4744 ("No MSI or MSI-X interrupts allocated"));
4745 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4746 ("MSI-X index too high"));
4747 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4748 KASSERT(mte->mte_vector != 0, ("no message vector"));
4749 mv = &dinfo->cfg.msix.msix_vectors[mte->mte_vector - 1];
4750 KASSERT(mv->mv_irq == rman_get_start(irq),
4752 if (mv->mv_address == 0) {
4753 KASSERT(mte->mte_handlers == 0,
4754 ("MSI-X table entry has handlers, but vector not mapped"));
4755 error = PCIB_MAP_MSI(device_get_parent(dev),
4756 child, rman_get_start(irq), &addr, &data);
4759 mv->mv_address = addr;
4764 * The MSIX table entry must be made valid by
4765 * incrementing the mte_handlers before
4766 * calling pci_enable_msix() and
4767 * pci_resume_msix(). Else the MSIX rewrite
4768 * table quirk will not work as expected.
4770 mte->mte_handlers++;
4771 if (mte->mte_handlers == 1) {
4772 pci_enable_msix(child, rid - 1, mv->mv_address,
4774 pci_unmask_msix(child, rid - 1);
4779 * Make sure that INTx is disabled if we are using MSI/MSI-X,
4780 * unless the device is affected by PCI_QUIRK_MSI_INTX_BUG,
4781 * in which case we "enable" INTx so MSI/MSI-X actually works.
4783 if (!pci_has_quirk(pci_get_devid(child),
4784 PCI_QUIRK_MSI_INTX_BUG))
4785 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4787 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4790 (void)bus_generic_teardown_intr(dev, child, irq,
4800 pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
4803 struct msix_table_entry *mte;
4804 struct resource_list_entry *rle;
4805 struct pci_devinfo *dinfo;
4808 if (irq == NULL || !(rman_get_flags(irq) & RF_ACTIVE))
4811 /* If this isn't a direct child, just bail out */
4812 if (device_get_parent(child) != dev)
4813 return(bus_generic_teardown_intr(dev, child, irq, cookie));
4815 rid = rman_get_rid(irq);
4818 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4821 * Check to see if the interrupt is MSI or MSI-X. If so,
4822 * decrement the appropriate handlers count and mask the
4823 * MSI-X message, or disable MSI messages if the count
4826 dinfo = device_get_ivars(child);
4827 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, rid);
4828 if (rle->res != irq)
4830 if (dinfo->cfg.msi.msi_alloc > 0) {
4831 KASSERT(rid <= dinfo->cfg.msi.msi_alloc,
4832 ("MSI-X index too high"));
4833 if (dinfo->cfg.msi.msi_handlers == 0)
4835 dinfo->cfg.msi.msi_handlers--;
4836 if (dinfo->cfg.msi.msi_handlers == 0)
4837 pci_disable_msi(child);
4839 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4840 ("No MSI or MSI-X interrupts allocated"));
4841 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4842 ("MSI-X index too high"));
4843 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4844 if (mte->mte_handlers == 0)
4846 mte->mte_handlers--;
4847 if (mte->mte_handlers == 0)
4848 pci_mask_msix(child, rid - 1);
4851 error = bus_generic_teardown_intr(dev, child, irq, cookie);
4854 ("%s: generic teardown failed for MSI/MSI-X", __func__));
4859 pci_print_child(device_t dev, device_t child)
4861 struct pci_devinfo *dinfo;
4862 struct resource_list *rl;
4865 dinfo = device_get_ivars(child);
4866 rl = &dinfo->resources;
4868 retval += bus_print_child_header(dev, child);
4870 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
4871 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
4872 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
4873 if (device_get_flags(dev))
4874 retval += printf(" flags %#x", device_get_flags(dev));
4876 retval += printf(" at device %d.%d", pci_get_slot(child),
4877 pci_get_function(child));
4879 retval += bus_print_child_domain(dev, child);
4880 retval += bus_print_child_footer(dev, child);
4889 int report; /* 0 = bootverbose, 1 = always */
4891 } pci_nomatch_tab[] = {
4892 {PCIC_OLD, -1, 1, "old"},
4893 {PCIC_OLD, PCIS_OLD_NONVGA, 1, "non-VGA display device"},
4894 {PCIC_OLD, PCIS_OLD_VGA, 1, "VGA-compatible display device"},
4895 {PCIC_STORAGE, -1, 1, "mass storage"},
4896 {PCIC_STORAGE, PCIS_STORAGE_SCSI, 1, "SCSI"},
4897 {PCIC_STORAGE, PCIS_STORAGE_IDE, 1, "ATA"},
4898 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, 1, "floppy disk"},
4899 {PCIC_STORAGE, PCIS_STORAGE_IPI, 1, "IPI"},
4900 {PCIC_STORAGE, PCIS_STORAGE_RAID, 1, "RAID"},
4901 {PCIC_STORAGE, PCIS_STORAGE_ATA_ADMA, 1, "ATA (ADMA)"},
4902 {PCIC_STORAGE, PCIS_STORAGE_SATA, 1, "SATA"},
4903 {PCIC_STORAGE, PCIS_STORAGE_SAS, 1, "SAS"},
4904 {PCIC_STORAGE, PCIS_STORAGE_NVM, 1, "NVM"},
4905 {PCIC_NETWORK, -1, 1, "network"},
4906 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, 1, "ethernet"},
4907 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, 1, "token ring"},
4908 {PCIC_NETWORK, PCIS_NETWORK_FDDI, 1, "fddi"},
4909 {PCIC_NETWORK, PCIS_NETWORK_ATM, 1, "ATM"},
4910 {PCIC_NETWORK, PCIS_NETWORK_ISDN, 1, "ISDN"},
4911 {PCIC_DISPLAY, -1, 1, "display"},
4912 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, 1, "VGA"},
4913 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, 1, "XGA"},
4914 {PCIC_DISPLAY, PCIS_DISPLAY_3D, 1, "3D"},
4915 {PCIC_MULTIMEDIA, -1, 1, "multimedia"},
4916 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, 1, "video"},
4917 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, 1, "audio"},
4918 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_TELE, 1, "telephony"},
4919 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_HDA, 1, "HDA"},
4920 {PCIC_MEMORY, -1, 1, "memory"},
4921 {PCIC_MEMORY, PCIS_MEMORY_RAM, 1, "RAM"},
4922 {PCIC_MEMORY, PCIS_MEMORY_FLASH, 1, "flash"},
4923 {PCIC_BRIDGE, -1, 1, "bridge"},
4924 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, 1, "HOST-PCI"},
4925 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, 1, "PCI-ISA"},
4926 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, 1, "PCI-EISA"},
4927 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, 1, "PCI-MCA"},
4928 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, 1, "PCI-PCI"},
4929 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, 1, "PCI-PCMCIA"},
4930 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, 1, "PCI-NuBus"},
4931 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, 1, "PCI-CardBus"},
4932 {PCIC_BRIDGE, PCIS_BRIDGE_RACEWAY, 1, "PCI-RACEway"},
4933 {PCIC_SIMPLECOMM, -1, 1, "simple comms"},
4934 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, 1, "UART"}, /* could detect 16550 */
4935 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, 1, "parallel port"},
4936 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MULSER, 1, "multiport serial"},
4937 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MODEM, 1, "generic modem"},
4938 {PCIC_BASEPERIPH, -1, 0, "base peripheral"},
4939 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, 1, "interrupt controller"},
4940 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, 1, "DMA controller"},
4941 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, 1, "timer"},
4942 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, 1, "realtime clock"},
4943 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PCIHOT, 1, "PCI hot-plug controller"},
4944 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_SDHC, 1, "SD host controller"},
4945 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_IOMMU, 1, "IOMMU"},
4946 {PCIC_INPUTDEV, -1, 1, "input device"},
4947 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, 1, "keyboard"},
4948 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,1, "digitizer"},
4949 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, 1, "mouse"},
4950 {PCIC_INPUTDEV, PCIS_INPUTDEV_SCANNER, 1, "scanner"},
4951 {PCIC_INPUTDEV, PCIS_INPUTDEV_GAMEPORT, 1, "gameport"},
4952 {PCIC_DOCKING, -1, 1, "docking station"},
4953 {PCIC_PROCESSOR, -1, 1, "processor"},
4954 {PCIC_SERIALBUS, -1, 1, "serial bus"},
4955 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, 1, "FireWire"},
4956 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, 1, "AccessBus"},
4957 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, 1, "SSA"},
4958 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, 1, "USB"},
4959 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, 1, "Fibre Channel"},
4960 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, 0, "SMBus"},
4961 {PCIC_WIRELESS, -1, 1, "wireless controller"},
4962 {PCIC_WIRELESS, PCIS_WIRELESS_IRDA, 1, "iRDA"},
4963 {PCIC_WIRELESS, PCIS_WIRELESS_IR, 1, "IR"},
4964 {PCIC_WIRELESS, PCIS_WIRELESS_RF, 1, "RF"},
4965 {PCIC_INTELLIIO, -1, 1, "intelligent I/O controller"},
4966 {PCIC_INTELLIIO, PCIS_INTELLIIO_I2O, 1, "I2O"},
4967 {PCIC_SATCOM, -1, 1, "satellite communication"},
4968 {PCIC_SATCOM, PCIS_SATCOM_TV, 1, "sat TV"},
4969 {PCIC_SATCOM, PCIS_SATCOM_AUDIO, 1, "sat audio"},
4970 {PCIC_SATCOM, PCIS_SATCOM_VOICE, 1, "sat voice"},
4971 {PCIC_SATCOM, PCIS_SATCOM_DATA, 1, "sat data"},
4972 {PCIC_CRYPTO, -1, 1, "encrypt/decrypt"},
4973 {PCIC_CRYPTO, PCIS_CRYPTO_NETCOMP, 1, "network/computer crypto"},
4974 {PCIC_CRYPTO, PCIS_CRYPTO_ENTERTAIN, 1, "entertainment crypto"},
4975 {PCIC_DASP, -1, 0, "dasp"},
4976 {PCIC_DASP, PCIS_DASP_DPIO, 1, "DPIO module"},
4977 {PCIC_DASP, PCIS_DASP_PERFCNTRS, 1, "performance counters"},
4978 {PCIC_DASP, PCIS_DASP_COMM_SYNC, 1, "communication synchronizer"},
4979 {PCIC_DASP, PCIS_DASP_MGMT_CARD, 1, "signal processing management"},
4984 pci_probe_nomatch(device_t dev, device_t child)
4987 const char *cp, *scp;
4991 * Look for a listing for this device in a loaded device database.
4994 if ((device = pci_describe_device(child)) != NULL) {
4995 device_printf(dev, "<%s>", device);
4996 free(device, M_DEVBUF);
4999 * Scan the class/subclass descriptions for a general
5004 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
5005 if (pci_nomatch_tab[i].class == pci_get_class(child)) {
5006 if (pci_nomatch_tab[i].subclass == -1) {
5007 cp = pci_nomatch_tab[i].desc;
5008 report = pci_nomatch_tab[i].report;
5009 } else if (pci_nomatch_tab[i].subclass ==
5010 pci_get_subclass(child)) {
5011 scp = pci_nomatch_tab[i].desc;
5012 report = pci_nomatch_tab[i].report;
5016 if (report || bootverbose) {
5017 device_printf(dev, "<%s%s%s>",
5019 ((cp != NULL) && (scp != NULL)) ? ", " : "",
5023 if (report || bootverbose) {
5024 printf(" at device %d.%d (no driver attached)\n",
5025 pci_get_slot(child), pci_get_function(child));
5027 pci_cfg_save(child, device_get_ivars(child), 1);
5031 pci_child_detached(device_t dev, device_t child)
5033 struct pci_devinfo *dinfo;
5034 struct resource_list *rl;
5036 dinfo = device_get_ivars(child);
5037 rl = &dinfo->resources;
5040 * Have to deallocate IRQs before releasing any MSI messages and
5041 * have to release MSI messages before deallocating any memory
5044 if (resource_list_release_active(rl, dev, child, SYS_RES_IRQ) != 0)
5045 pci_printf(&dinfo->cfg, "Device leaked IRQ resources\n");
5046 if (dinfo->cfg.msi.msi_alloc != 0 || dinfo->cfg.msix.msix_alloc != 0) {
5047 if (dinfo->cfg.msi.msi_alloc != 0)
5048 pci_printf(&dinfo->cfg, "Device leaked %d MSI "
5049 "vectors\n", dinfo->cfg.msi.msi_alloc);
5051 pci_printf(&dinfo->cfg, "Device leaked %d MSI-X "
5052 "vectors\n", dinfo->cfg.msix.msix_alloc);
5053 (void)pci_release_msi(child);
5055 if (resource_list_release_active(rl, dev, child, SYS_RES_MEMORY) != 0)
5056 pci_printf(&dinfo->cfg, "Device leaked memory resources\n");
5057 if (resource_list_release_active(rl, dev, child, SYS_RES_IOPORT) != 0)
5058 pci_printf(&dinfo->cfg, "Device leaked I/O resources\n");
5060 if (resource_list_release_active(rl, dev, child, PCI_RES_BUS) != 0)
5061 pci_printf(&dinfo->cfg, "Device leaked PCI bus numbers\n");
5064 pci_cfg_save(child, dinfo, 1);
5068 * Parse the PCI device database, if loaded, and return a pointer to a
5069 * description of the device.
5071 * The database is flat text formatted as follows:
5073 * Any line not in a valid format is ignored.
5074 * Lines are terminated with newline '\n' characters.
5076 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then
5079 * A DEVICE line is entered immediately below the corresponding VENDOR ID.
5080 * - devices cannot be listed without a corresponding VENDOR line.
5081 * A DEVICE line consists of a TAB, the 4 digit (hex) device code,
5082 * another TAB, then the device name.
5086 * Assuming (ptr) points to the beginning of a line in the database,
5087 * return the vendor or device and description of the next entry.
5088 * The value of (vendor) or (device) inappropriate for the entry type
5089 * is set to -1. Returns nonzero at the end of the database.
5091 * Note that this is slightly unrobust in the face of corrupt data;
5092 * we attempt to safeguard against this by spamming the end of the
5093 * database with a newline when we initialise.
5096 pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc)
5105 left = pci_vendordata_size - (cp - pci_vendordata);
5113 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2)
5117 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2)
5120 /* skip to next line */
5121 while (*cp != '\n' && left > 0) {
5130 /* skip to next line */
5131 while (*cp != '\n' && left > 0) {
5135 if (*cp == '\n' && left > 0)
5142 pci_describe_device(device_t dev)
5145 char *desc, *vp, *dp, *line;
5147 desc = vp = dp = NULL;
5150 * If we have no vendor data, we can't do anything.
5152 if (pci_vendordata == NULL)
5156 * Scan the vendor data looking for this device
5158 line = pci_vendordata;
5159 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5162 if (pci_describe_parse_line(&line, &vendor, &device, &vp))
5164 if (vendor == pci_get_vendor(dev))
5167 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5170 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) {
5178 if (device == pci_get_device(dev))
5182 snprintf(dp, 80, "0x%x", pci_get_device(dev));
5183 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) !=
5185 sprintf(desc, "%s, %s", vp, dp);
5195 pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
5197 struct pci_devinfo *dinfo;
5200 dinfo = device_get_ivars(child);
5204 case PCI_IVAR_ETHADDR:
5206 * The generic accessor doesn't deal with failure, so
5207 * we set the return value, then return an error.
5209 *((uint8_t **) result) = NULL;
5211 case PCI_IVAR_SUBVENDOR:
5212 *result = cfg->subvendor;
5214 case PCI_IVAR_SUBDEVICE:
5215 *result = cfg->subdevice;
5217 case PCI_IVAR_VENDOR:
5218 *result = cfg->vendor;
5220 case PCI_IVAR_DEVICE:
5221 *result = cfg->device;
5223 case PCI_IVAR_DEVID:
5224 *result = (cfg->device << 16) | cfg->vendor;
5226 case PCI_IVAR_CLASS:
5227 *result = cfg->baseclass;
5229 case PCI_IVAR_SUBCLASS:
5230 *result = cfg->subclass;
5232 case PCI_IVAR_PROGIF:
5233 *result = cfg->progif;
5235 case PCI_IVAR_REVID:
5236 *result = cfg->revid;
5238 case PCI_IVAR_INTPIN:
5239 *result = cfg->intpin;
5242 *result = cfg->intline;
5244 case PCI_IVAR_DOMAIN:
5245 *result = cfg->domain;
5251 *result = cfg->slot;
5253 case PCI_IVAR_FUNCTION:
5254 *result = cfg->func;
5256 case PCI_IVAR_CMDREG:
5257 *result = cfg->cmdreg;
5259 case PCI_IVAR_CACHELNSZ:
5260 *result = cfg->cachelnsz;
5262 case PCI_IVAR_MINGNT:
5263 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5267 *result = cfg->mingnt;
5269 case PCI_IVAR_MAXLAT:
5270 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5274 *result = cfg->maxlat;
5276 case PCI_IVAR_LATTIMER:
5277 *result = cfg->lattimer;
5286 pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
5288 struct pci_devinfo *dinfo;
5290 dinfo = device_get_ivars(child);
5293 case PCI_IVAR_INTPIN:
5294 dinfo->cfg.intpin = value;
5296 case PCI_IVAR_ETHADDR:
5297 case PCI_IVAR_SUBVENDOR:
5298 case PCI_IVAR_SUBDEVICE:
5299 case PCI_IVAR_VENDOR:
5300 case PCI_IVAR_DEVICE:
5301 case PCI_IVAR_DEVID:
5302 case PCI_IVAR_CLASS:
5303 case PCI_IVAR_SUBCLASS:
5304 case PCI_IVAR_PROGIF:
5305 case PCI_IVAR_REVID:
5307 case PCI_IVAR_DOMAIN:
5310 case PCI_IVAR_FUNCTION:
5311 return (EINVAL); /* disallow for now */
5318 #include "opt_ddb.h"
5320 #include <ddb/ddb.h>
5321 #include <sys/cons.h>
5324 * List resources based on pci map registers, used for within ddb
5327 DB_SHOW_COMMAND(pciregs, db_pci_dump)
5329 struct pci_devinfo *dinfo;
5330 struct devlist *devlist_head;
5333 int i, error, none_count;
5336 /* get the head of the device queue */
5337 devlist_head = &pci_devq;
5340 * Go through the list of devices and print out devices
5342 for (error = 0, i = 0,
5343 dinfo = STAILQ_FIRST(devlist_head);
5344 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !db_pager_quit;
5345 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
5346 /* Populate pd_name and pd_unit */
5349 name = device_get_name(dinfo->cfg.dev);
5352 db_printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x "
5353 "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
5354 (name && *name) ? name : "none",
5355 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) :
5357 p->pc_sel.pc_domain, p->pc_sel.pc_bus, p->pc_sel.pc_dev,
5358 p->pc_sel.pc_func, (p->pc_class << 16) |
5359 (p->pc_subclass << 8) | p->pc_progif,
5360 (p->pc_subdevice << 16) | p->pc_subvendor,
5361 (p->pc_device << 16) | p->pc_vendor,
5362 p->pc_revid, p->pc_hdr);
5367 static struct resource *
5368 pci_reserve_map(device_t dev, device_t child, int type, int *rid,
5369 rman_res_t start, rman_res_t end, rman_res_t count, u_int num,
5372 struct pci_devinfo *dinfo = device_get_ivars(child);
5373 struct resource_list *rl = &dinfo->resources;
5374 struct resource *res;
5377 pci_addr_t map, testval;
5382 /* If rid is managed by EA, ignore it */
5383 if (pci_ea_is_enabled(child, *rid))
5386 pm = pci_find_bar(child, *rid);
5388 /* This is a BAR that we failed to allocate earlier. */
5389 mapsize = pm->pm_size;
5393 * Weed out the bogons, and figure out how large the
5394 * BAR/map is. BARs that read back 0 here are bogus
5395 * and unimplemented. Note: atapci in legacy mode are
5396 * special and handled elsewhere in the code. If you
5397 * have a atapci device in legacy mode and it fails
5398 * here, that other code is broken.
5400 pci_read_bar(child, *rid, &map, &testval, NULL);
5403 * Determine the size of the BAR and ignore BARs with a size
5404 * of 0. Device ROM BARs use a different mask value.
5406 if (PCIR_IS_BIOS(&dinfo->cfg, *rid))
5407 mapsize = pci_romsize(testval);
5409 mapsize = pci_mapsize(testval);
5412 pm = pci_add_bar(child, *rid, map, mapsize);
5415 if (PCI_BAR_MEM(map) || PCIR_IS_BIOS(&dinfo->cfg, *rid)) {
5416 if (type != SYS_RES_MEMORY) {
5419 "child %s requested type %d for rid %#x,"
5420 " but the BAR says it is an memio\n",
5421 device_get_nameunit(child), type, *rid);
5425 if (type != SYS_RES_IOPORT) {
5428 "child %s requested type %d for rid %#x,"
5429 " but the BAR says it is an ioport\n",
5430 device_get_nameunit(child), type, *rid);
5436 * For real BARs, we need to override the size that
5437 * the driver requests, because that's what the BAR
5438 * actually uses and we would otherwise have a
5439 * situation where we might allocate the excess to
5440 * another driver, which won't work.
5442 count = ((pci_addr_t)1 << mapsize) * num;
5443 if (RF_ALIGNMENT(flags) < mapsize)
5444 flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize);
5445 if (PCI_BAR_MEM(map) && (map & PCIM_BAR_MEM_PREFETCH))
5446 flags |= RF_PREFETCHABLE;
5449 * Allocate enough resource, and then write back the
5450 * appropriate BAR for that resource.
5452 resource_list_add(rl, type, *rid, start, end, count);
5453 res = resource_list_reserve(rl, dev, child, type, rid, start, end,
5454 count, flags & ~RF_ACTIVE);
5456 resource_list_delete(rl, type, *rid);
5457 device_printf(child,
5458 "%#jx bytes of rid %#x res %d failed (%#jx, %#jx).\n",
5459 count, *rid, type, start, end);
5463 device_printf(child,
5464 "Lazy allocation of %#jx bytes rid %#x type %d at %#jx\n",
5465 count, *rid, type, rman_get_start(res));
5467 /* Disable decoding via the CMD register before updating the BAR */
5468 cmd = pci_read_config(child, PCIR_COMMAND, 2);
5469 pci_write_config(child, PCIR_COMMAND,
5470 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
5472 map = rman_get_start(res);
5473 pci_write_bar(child, pm, map);
5475 /* Restore the original value of the CMD register */
5476 pci_write_config(child, PCIR_COMMAND, cmd, 2);
5482 pci_alloc_multi_resource(device_t dev, device_t child, int type, int *rid,
5483 rman_res_t start, rman_res_t end, rman_res_t count, u_long num,
5486 struct pci_devinfo *dinfo;
5487 struct resource_list *rl;
5488 struct resource_list_entry *rle;
5489 struct resource *res;
5493 * Perform lazy resource allocation
5495 dinfo = device_get_ivars(child);
5496 rl = &dinfo->resources;
5499 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
5501 return (pci_alloc_secbus(dev, child, rid, start, end, count,
5506 * Can't alloc legacy interrupt once MSI messages have
5509 if (*rid == 0 && (cfg->msi.msi_alloc > 0 ||
5510 cfg->msix.msix_alloc > 0))
5514 * If the child device doesn't have an interrupt
5515 * routed and is deserving of an interrupt, try to
5518 if (*rid == 0 && !PCI_INTERRUPT_VALID(cfg->intline) &&
5520 pci_assign_interrupt(dev, child, 0);
5522 case SYS_RES_IOPORT:
5523 case SYS_RES_MEMORY:
5526 * PCI-PCI bridge I/O window resources are not BARs.
5527 * For those allocations just pass the request up the
5530 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE) {
5532 case PCIR_IOBASEL_1:
5533 case PCIR_MEMBASE_1:
5534 case PCIR_PMBASEL_1:
5536 * XXX: Should we bother creating a resource
5539 return (bus_generic_alloc_resource(dev, child,
5540 type, rid, start, end, count, flags));
5544 /* Reserve resources for this BAR if needed. */
5545 rle = resource_list_find(rl, type, *rid);
5547 res = pci_reserve_map(dev, child, type, rid, start, end,
5553 return (resource_list_alloc(rl, dev, child, type, rid,
5554 start, end, count, flags));
5558 pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
5559 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
5562 struct pci_devinfo *dinfo;
5565 if (device_get_parent(child) != dev)
5566 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
5567 type, rid, start, end, count, flags));
5570 dinfo = device_get_ivars(child);
5571 if (dinfo->cfg.flags & PCICFG_VF) {
5573 /* VFs can't have I/O BARs. */
5574 case SYS_RES_IOPORT:
5576 case SYS_RES_MEMORY:
5577 return (pci_vf_alloc_mem_resource(dev, child, rid,
5578 start, end, count, flags));
5581 /* Fall through for other types of resource allocations. */
5585 return (pci_alloc_multi_resource(dev, child, type, rid, start, end,
5590 pci_release_resource(device_t dev, device_t child, int type, int rid,
5593 struct pci_devinfo *dinfo;
5594 struct resource_list *rl;
5597 if (device_get_parent(child) != dev)
5598 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
5601 dinfo = device_get_ivars(child);
5605 if (dinfo->cfg.flags & PCICFG_VF) {
5607 /* VFs can't have I/O BARs. */
5608 case SYS_RES_IOPORT:
5610 case SYS_RES_MEMORY:
5611 return (pci_vf_release_mem_resource(dev, child, rid,
5615 /* Fall through for other types of resource allocations. */
5621 * PCI-PCI bridge I/O window resources are not BARs. For
5622 * those allocations just pass the request up the tree.
5624 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE &&
5625 (type == SYS_RES_IOPORT || type == SYS_RES_MEMORY)) {
5627 case PCIR_IOBASEL_1:
5628 case PCIR_MEMBASE_1:
5629 case PCIR_PMBASEL_1:
5630 return (bus_generic_release_resource(dev, child, type,
5636 rl = &dinfo->resources;
5637 return (resource_list_release(rl, dev, child, type, rid, r));
5641 pci_activate_resource(device_t dev, device_t child, int type, int rid,
5644 struct pci_devinfo *dinfo;
5647 error = bus_generic_activate_resource(dev, child, type, rid, r);
5651 /* Enable decoding in the command register when activating BARs. */
5652 if (device_get_parent(child) == dev) {
5653 /* Device ROMs need their decoding explicitly enabled. */
5654 dinfo = device_get_ivars(child);
5655 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5656 pci_write_bar(child, pci_find_bar(child, rid),
5657 rman_get_start(r) | PCIM_BIOS_ENABLE);
5659 case SYS_RES_IOPORT:
5660 case SYS_RES_MEMORY:
5661 error = PCI_ENABLE_IO(dev, child, type);
5669 pci_deactivate_resource(device_t dev, device_t child, int type,
5670 int rid, struct resource *r)
5672 struct pci_devinfo *dinfo;
5675 error = bus_generic_deactivate_resource(dev, child, type, rid, r);
5679 /* Disable decoding for device ROMs. */
5680 if (device_get_parent(child) == dev) {
5681 dinfo = device_get_ivars(child);
5682 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5683 pci_write_bar(child, pci_find_bar(child, rid),
5690 pci_child_deleted(device_t dev, device_t child)
5692 struct resource_list_entry *rle;
5693 struct resource_list *rl;
5694 struct pci_devinfo *dinfo;
5696 dinfo = device_get_ivars(child);
5697 rl = &dinfo->resources;
5699 EVENTHANDLER_INVOKE(pci_delete_device, child);
5701 /* Turn off access to resources we're about to free */
5702 if (bus_child_present(child) != 0) {
5703 pci_write_config(child, PCIR_COMMAND, pci_read_config(child,
5704 PCIR_COMMAND, 2) & ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2);
5706 pci_disable_busmaster(child);
5709 /* Free all allocated resources */
5710 STAILQ_FOREACH(rle, rl, link) {
5712 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5713 resource_list_busy(rl, rle->type, rle->rid)) {
5714 pci_printf(&dinfo->cfg,
5715 "Resource still owned, oops. "
5716 "(type=%d, rid=%d, addr=%lx)\n",
5717 rle->type, rle->rid,
5718 rman_get_start(rle->res));
5719 bus_release_resource(child, rle->type, rle->rid,
5722 resource_list_unreserve(rl, dev, child, rle->type,
5726 resource_list_free(rl);
5732 pci_delete_resource(device_t dev, device_t child, int type, int rid)
5734 struct pci_devinfo *dinfo;
5735 struct resource_list *rl;
5736 struct resource_list_entry *rle;
5738 if (device_get_parent(child) != dev)
5741 dinfo = device_get_ivars(child);
5742 rl = &dinfo->resources;
5743 rle = resource_list_find(rl, type, rid);
5748 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5749 resource_list_busy(rl, type, rid)) {
5750 device_printf(dev, "delete_resource: "
5751 "Resource still owned by child, oops. "
5752 "(type=%d, rid=%d, addr=%jx)\n",
5753 type, rid, rman_get_start(rle->res));
5756 resource_list_unreserve(rl, dev, child, type, rid);
5758 resource_list_delete(rl, type, rid);
5761 struct resource_list *
5762 pci_get_resource_list (device_t dev, device_t child)
5764 struct pci_devinfo *dinfo = device_get_ivars(child);
5766 return (&dinfo->resources);
5771 pci_get_dma_tag(device_t bus, device_t dev)
5774 struct pci_softc *sc;
5776 if (device_get_parent(dev) == bus) {
5777 /* try iommu and return if it works */
5778 tag = iommu_get_dma_tag(bus, dev);
5782 sc = device_get_softc(bus);
5783 tag = sc->sc_dma_tag;
5789 pci_get_dma_tag(device_t bus, device_t dev)
5791 struct pci_softc *sc = device_get_softc(bus);
5793 return (sc->sc_dma_tag);
5798 pci_read_config_method(device_t dev, device_t child, int reg, int width)
5800 struct pci_devinfo *dinfo = device_get_ivars(child);
5801 pcicfgregs *cfg = &dinfo->cfg;
5805 * SR-IOV VFs don't implement the VID or DID registers, so we have to
5806 * emulate them here.
5808 if (cfg->flags & PCICFG_VF) {
5809 if (reg == PCIR_VENDOR) {
5812 return (cfg->device << 16 | cfg->vendor);
5814 return (cfg->vendor);
5816 return (cfg->vendor & 0xff);
5818 return (0xffffffff);
5820 } else if (reg == PCIR_DEVICE) {
5822 /* Note that an unaligned 4-byte read is an error. */
5824 return (cfg->device);
5826 return (cfg->device & 0xff);
5828 return (0xffffffff);
5834 return (PCIB_READ_CONFIG(device_get_parent(dev),
5835 cfg->bus, cfg->slot, cfg->func, reg, width));
5839 pci_write_config_method(device_t dev, device_t child, int reg,
5840 uint32_t val, int width)
5842 struct pci_devinfo *dinfo = device_get_ivars(child);
5843 pcicfgregs *cfg = &dinfo->cfg;
5845 PCIB_WRITE_CONFIG(device_get_parent(dev),
5846 cfg->bus, cfg->slot, cfg->func, reg, val, width);
5850 pci_child_location_str_method(device_t dev, device_t child, char *buf,
5854 snprintf(buf, buflen, "slot=%d function=%d dbsf=pci%d:%d:%d:%d",
5855 pci_get_slot(child), pci_get_function(child), pci_get_domain(child),
5856 pci_get_bus(child), pci_get_slot(child), pci_get_function(child));
5861 pci_child_pnpinfo_str_method(device_t dev, device_t child, char *buf,
5864 struct pci_devinfo *dinfo;
5867 dinfo = device_get_ivars(child);
5869 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x "
5870 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device,
5871 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass,
5877 pci_assign_interrupt_method(device_t dev, device_t child)
5879 struct pci_devinfo *dinfo = device_get_ivars(child);
5880 pcicfgregs *cfg = &dinfo->cfg;
5882 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child,
5887 pci_lookup(void *arg, const char *name, device_t *dev)
5891 int domain, bus, slot, func;
5897 * Accept pciconf-style selectors of either pciD:B:S:F or
5898 * pciB:S:F. In the latter case, the domain is assumed to
5901 if (strncmp(name, "pci", 3) != 0)
5903 val = strtol(name + 3, &end, 10);
5904 if (val < 0 || val > INT_MAX || *end != ':')
5907 val = strtol(end + 1, &end, 10);
5908 if (val < 0 || val > INT_MAX || *end != ':')
5911 val = strtol(end + 1, &end, 10);
5912 if (val < 0 || val > INT_MAX)
5916 val = strtol(end + 1, &end, 10);
5917 if (val < 0 || val > INT_MAX || *end != '\0')
5920 } else if (*end == '\0') {
5928 if (domain > PCI_DOMAINMAX || bus > PCI_BUSMAX || slot > PCI_SLOTMAX ||
5929 func > PCIE_ARI_FUNCMAX || (slot != 0 && func > PCI_FUNCMAX))
5932 *dev = pci_find_dbsf(domain, bus, slot, func);
5936 pci_modevent(module_t mod, int what, void *arg)
5938 static struct cdev *pci_cdev;
5939 static eventhandler_tag tag;
5943 STAILQ_INIT(&pci_devq);
5945 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644,
5947 pci_load_vendor_data();
5948 tag = EVENTHANDLER_REGISTER(dev_lookup, pci_lookup, NULL,
5954 EVENTHANDLER_DEREGISTER(dev_lookup, tag);
5955 destroy_dev(pci_cdev);
5963 pci_cfg_restore_pcie(device_t dev, struct pci_devinfo *dinfo)
5965 #define WREG(n, v) pci_write_config(dev, pos + (n), (v), 2)
5966 struct pcicfg_pcie *cfg;
5969 cfg = &dinfo->cfg.pcie;
5970 pos = cfg->pcie_location;
5972 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
5974 WREG(PCIER_DEVICE_CTL, cfg->pcie_device_ctl);
5976 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5977 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
5978 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
5979 WREG(PCIER_LINK_CTL, cfg->pcie_link_ctl);
5981 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5982 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
5983 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
5984 WREG(PCIER_SLOT_CTL, cfg->pcie_slot_ctl);
5986 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5987 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
5988 WREG(PCIER_ROOT_CTL, cfg->pcie_root_ctl);
5991 WREG(PCIER_DEVICE_CTL2, cfg->pcie_device_ctl2);
5992 WREG(PCIER_LINK_CTL2, cfg->pcie_link_ctl2);
5993 WREG(PCIER_SLOT_CTL2, cfg->pcie_slot_ctl2);
5999 pci_cfg_restore_pcix(device_t dev, struct pci_devinfo *dinfo)
6001 pci_write_config(dev, dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND,
6002 dinfo->cfg.pcix.pcix_command, 2);
6006 pci_cfg_restore(device_t dev, struct pci_devinfo *dinfo)
6010 * Restore the device to full power mode. We must do this
6011 * before we restore the registers because moving from D3 to
6012 * D0 will cause the chip's BARs and some other registers to
6013 * be reset to some unknown power on reset values. Cut down
6014 * the noise on boot by doing nothing if we are already in
6017 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0)
6018 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6019 pci_write_config(dev, PCIR_INTLINE, dinfo->cfg.intline, 1);
6020 pci_write_config(dev, PCIR_INTPIN, dinfo->cfg.intpin, 1);
6021 pci_write_config(dev, PCIR_CACHELNSZ, dinfo->cfg.cachelnsz, 1);
6022 pci_write_config(dev, PCIR_LATTIMER, dinfo->cfg.lattimer, 1);
6023 pci_write_config(dev, PCIR_PROGIF, dinfo->cfg.progif, 1);
6024 pci_write_config(dev, PCIR_REVID, dinfo->cfg.revid, 1);
6025 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
6026 case PCIM_HDRTYPE_NORMAL:
6027 pci_write_config(dev, PCIR_MINGNT, dinfo->cfg.mingnt, 1);
6028 pci_write_config(dev, PCIR_MAXLAT, dinfo->cfg.maxlat, 1);
6030 case PCIM_HDRTYPE_BRIDGE:
6031 pci_write_config(dev, PCIR_SECLAT_1,
6032 dinfo->cfg.bridge.br_seclat, 1);
6033 pci_write_config(dev, PCIR_SUBBUS_1,
6034 dinfo->cfg.bridge.br_subbus, 1);
6035 pci_write_config(dev, PCIR_SECBUS_1,
6036 dinfo->cfg.bridge.br_secbus, 1);
6037 pci_write_config(dev, PCIR_PRIBUS_1,
6038 dinfo->cfg.bridge.br_pribus, 1);
6039 pci_write_config(dev, PCIR_BRIDGECTL_1,
6040 dinfo->cfg.bridge.br_control, 2);
6042 case PCIM_HDRTYPE_CARDBUS:
6043 pci_write_config(dev, PCIR_SECLAT_2,
6044 dinfo->cfg.bridge.br_seclat, 1);
6045 pci_write_config(dev, PCIR_SUBBUS_2,
6046 dinfo->cfg.bridge.br_subbus, 1);
6047 pci_write_config(dev, PCIR_SECBUS_2,
6048 dinfo->cfg.bridge.br_secbus, 1);
6049 pci_write_config(dev, PCIR_PRIBUS_2,
6050 dinfo->cfg.bridge.br_pribus, 1);
6051 pci_write_config(dev, PCIR_BRIDGECTL_2,
6052 dinfo->cfg.bridge.br_control, 2);
6055 pci_restore_bars(dev);
6057 if ((dinfo->cfg.hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_BRIDGE)
6058 pci_write_config(dev, PCIR_COMMAND, dinfo->cfg.cmdreg, 2);
6061 * Restore extended capabilities for PCI-Express and PCI-X
6063 if (dinfo->cfg.pcie.pcie_location != 0)
6064 pci_cfg_restore_pcie(dev, dinfo);
6065 if (dinfo->cfg.pcix.pcix_location != 0)
6066 pci_cfg_restore_pcix(dev, dinfo);
6068 /* Restore MSI and MSI-X configurations if they are present. */
6069 if (dinfo->cfg.msi.msi_location != 0)
6070 pci_resume_msi(dev);
6071 if (dinfo->cfg.msix.msix_location != 0)
6072 pci_resume_msix(dev);
6075 if (dinfo->cfg.iov != NULL)
6076 pci_iov_cfg_restore(dev, dinfo);
6081 pci_cfg_save_pcie(device_t dev, struct pci_devinfo *dinfo)
6083 #define RREG(n) pci_read_config(dev, pos + (n), 2)
6084 struct pcicfg_pcie *cfg;
6087 cfg = &dinfo->cfg.pcie;
6088 pos = cfg->pcie_location;
6090 cfg->pcie_flags = RREG(PCIER_FLAGS);
6092 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
6094 cfg->pcie_device_ctl = RREG(PCIER_DEVICE_CTL);
6096 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6097 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
6098 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
6099 cfg->pcie_link_ctl = RREG(PCIER_LINK_CTL);
6101 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6102 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
6103 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
6104 cfg->pcie_slot_ctl = RREG(PCIER_SLOT_CTL);
6106 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6107 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
6108 cfg->pcie_root_ctl = RREG(PCIER_ROOT_CTL);
6111 cfg->pcie_device_ctl2 = RREG(PCIER_DEVICE_CTL2);
6112 cfg->pcie_link_ctl2 = RREG(PCIER_LINK_CTL2);
6113 cfg->pcie_slot_ctl2 = RREG(PCIER_SLOT_CTL2);
6119 pci_cfg_save_pcix(device_t dev, struct pci_devinfo *dinfo)
6121 dinfo->cfg.pcix.pcix_command = pci_read_config(dev,
6122 dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND, 2);
6126 pci_cfg_save(device_t dev, struct pci_devinfo *dinfo, int setstate)
6132 * Some drivers apparently write to these registers w/o updating our
6133 * cached copy. No harm happens if we update the copy, so do so here
6134 * so we can restore them. The COMMAND register is modified by the
6135 * bus w/o updating the cache. This should represent the normally
6136 * writable portion of the 'defined' part of type 0/1/2 headers.
6138 dinfo->cfg.vendor = pci_read_config(dev, PCIR_VENDOR, 2);
6139 dinfo->cfg.device = pci_read_config(dev, PCIR_DEVICE, 2);
6140 dinfo->cfg.cmdreg = pci_read_config(dev, PCIR_COMMAND, 2);
6141 dinfo->cfg.intline = pci_read_config(dev, PCIR_INTLINE, 1);
6142 dinfo->cfg.intpin = pci_read_config(dev, PCIR_INTPIN, 1);
6143 dinfo->cfg.cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
6144 dinfo->cfg.lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
6145 dinfo->cfg.baseclass = pci_read_config(dev, PCIR_CLASS, 1);
6146 dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1);
6147 dinfo->cfg.progif = pci_read_config(dev, PCIR_PROGIF, 1);
6148 dinfo->cfg.revid = pci_read_config(dev, PCIR_REVID, 1);
6149 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
6150 case PCIM_HDRTYPE_NORMAL:
6151 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_0, 2);
6152 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_0, 2);
6153 dinfo->cfg.mingnt = pci_read_config(dev, PCIR_MINGNT, 1);
6154 dinfo->cfg.maxlat = pci_read_config(dev, PCIR_MAXLAT, 1);
6156 case PCIM_HDRTYPE_BRIDGE:
6157 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6159 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6161 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6163 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6165 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6166 PCIR_BRIDGECTL_1, 2);
6168 case PCIM_HDRTYPE_CARDBUS:
6169 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6171 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6173 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6175 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6177 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6178 PCIR_BRIDGECTL_2, 2);
6179 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_2, 2);
6180 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_2, 2);
6184 if (dinfo->cfg.pcie.pcie_location != 0)
6185 pci_cfg_save_pcie(dev, dinfo);
6187 if (dinfo->cfg.pcix.pcix_location != 0)
6188 pci_cfg_save_pcix(dev, dinfo);
6191 if (dinfo->cfg.iov != NULL)
6192 pci_iov_cfg_save(dev, dinfo);
6196 * don't set the state for display devices, base peripherals and
6197 * memory devices since bad things happen when they are powered down.
6198 * We should (a) have drivers that can easily detach and (b) use
6199 * generic drivers for these devices so that some device actually
6200 * attaches. We need to make sure that when we implement (a) we don't
6201 * power the device down on a reattach.
6203 cls = pci_get_class(dev);
6206 switch (pci_do_power_nodriver)
6208 case 0: /* NO powerdown at all */
6210 case 1: /* Conservative about what to power down */
6211 if (cls == PCIC_STORAGE)
6214 case 2: /* Aggressive about what to power down */
6215 if (cls == PCIC_DISPLAY || cls == PCIC_MEMORY ||
6216 cls == PCIC_BASEPERIPH)
6219 case 3: /* Power down everything */
6223 * PCI spec says we can only go into D3 state from D0 state.
6224 * Transition from D[12] into D0 before going to D3 state.
6226 ps = pci_get_powerstate(dev);
6227 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6228 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6229 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3)
6230 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6233 /* Wrapper APIs suitable for device driver use. */
6235 pci_save_state(device_t dev)
6237 struct pci_devinfo *dinfo;
6239 dinfo = device_get_ivars(dev);
6240 pci_cfg_save(dev, dinfo, 0);
6244 pci_restore_state(device_t dev)
6246 struct pci_devinfo *dinfo;
6248 dinfo = device_get_ivars(dev);
6249 pci_cfg_restore(dev, dinfo);
6253 pci_get_id_method(device_t dev, device_t child, enum pci_id_type type,
6257 return (PCIB_GET_ID(device_get_parent(dev), child, type, id));
6260 /* Find the upstream port of a given PCI device in a root complex. */
6262 pci_find_pcie_root_port(device_t dev)
6264 struct pci_devinfo *dinfo;
6265 devclass_t pci_class;
6268 pci_class = devclass_find("pci");
6269 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class,
6270 ("%s: non-pci device %s", __func__, device_get_nameunit(dev)));
6273 * Walk the bridge hierarchy until we find a PCI-e root
6274 * port or a non-PCI device.
6277 bus = device_get_parent(dev);
6278 KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
6279 device_get_nameunit(dev)));
6281 pcib = device_get_parent(bus);
6282 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
6283 device_get_nameunit(bus)));
6286 * pcib's parent must be a PCI bus for this to be a
6289 if (device_get_devclass(device_get_parent(pcib)) != pci_class)
6292 dinfo = device_get_ivars(pcib);
6293 if (dinfo->cfg.pcie.pcie_location != 0 &&
6294 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT)
6302 * Wait for pending transactions to complete on a PCI-express function.
6304 * The maximum delay is specified in milliseconds in max_delay. Note
6305 * that this function may sleep.
6307 * Returns true if the function is idle and false if the timeout is
6308 * exceeded. If dev is not a PCI-express function, this returns true.
6311 pcie_wait_for_pending_transactions(device_t dev, u_int max_delay)
6313 struct pci_devinfo *dinfo = device_get_ivars(dev);
6317 cap = dinfo->cfg.pcie.pcie_location;
6321 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6322 while (sta & PCIEM_STA_TRANSACTION_PND) {
6326 /* Poll once every 100 milliseconds up to the timeout. */
6327 if (max_delay > 100) {
6328 pause_sbt("pcietp", 100 * SBT_1MS, 0, C_HARDCLOCK);
6331 pause_sbt("pcietp", max_delay * SBT_1MS, 0,
6335 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6342 * Determine the maximum Completion Timeout in microseconds.
6344 * For non-PCI-express functions this returns 0.
6347 pcie_get_max_completion_timeout(device_t dev)
6349 struct pci_devinfo *dinfo = device_get_ivars(dev);
6352 cap = dinfo->cfg.pcie.pcie_location;
6357 * Functions using the 1.x spec use the default timeout range of
6358 * 50 microseconds to 50 milliseconds. Functions that do not
6359 * support programmable timeouts also use this range.
6361 if ((dinfo->cfg.pcie.pcie_flags & PCIEM_FLAGS_VERSION) < 2 ||
6362 (pci_read_config(dev, cap + PCIER_DEVICE_CAP2, 4) &
6363 PCIEM_CAP2_COMP_TIMO_RANGES) == 0)
6366 switch (pci_read_config(dev, cap + PCIER_DEVICE_CTL2, 2) &
6367 PCIEM_CTL2_COMP_TIMO_VAL) {
6368 case PCIEM_CTL2_COMP_TIMO_100US:
6370 case PCIEM_CTL2_COMP_TIMO_10MS:
6372 case PCIEM_CTL2_COMP_TIMO_55MS:
6374 case PCIEM_CTL2_COMP_TIMO_210MS:
6375 return (210 * 1000);
6376 case PCIEM_CTL2_COMP_TIMO_900MS:
6377 return (900 * 1000);
6378 case PCIEM_CTL2_COMP_TIMO_3500MS:
6379 return (3500 * 1000);
6380 case PCIEM_CTL2_COMP_TIMO_13S:
6381 return (13 * 1000 * 1000);
6382 case PCIEM_CTL2_COMP_TIMO_64S:
6383 return (64 * 1000 * 1000);
6390 pcie_apei_error(device_t dev, int sev, uint8_t *aerp)
6392 struct pci_devinfo *dinfo = device_get_ivars(dev);
6398 if (sev == PCIEM_STA_CORRECTABLE_ERROR)
6400 else if (sev == PCIEM_STA_NON_FATAL_ERROR)
6401 s = "Uncorrectable (Non-Fatal)";
6403 s = "Uncorrectable (Fatal)";
6404 device_printf(dev, "%s PCIe error reported by APEI\n", s);
6406 if (sev == PCIEM_STA_CORRECTABLE_ERROR) {
6407 r = le32dec(aerp + PCIR_AER_COR_STATUS);
6408 r1 = le32dec(aerp + PCIR_AER_COR_MASK);
6410 r = le32dec(aerp + PCIR_AER_UC_STATUS);
6411 r1 = le32dec(aerp + PCIR_AER_UC_MASK);
6413 device_printf(dev, "status 0x%08x mask 0x%08x", r, r1);
6414 if (sev != PCIEM_STA_CORRECTABLE_ERROR) {
6415 r = le32dec(aerp + PCIR_AER_UC_SEVERITY);
6416 rs = le16dec(aerp + PCIR_AER_CAP_CONTROL);
6417 printf(" severity 0x%08x first %d\n",
6423 /* As kind of recovery just report and clear the error statuses. */
6424 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
6425 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6427 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
6428 device_printf(dev, "Clearing UC AER errors 0x%08x\n", r);
6431 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6433 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
6434 device_printf(dev, "Clearing COR AER errors 0x%08x\n", r);
6437 if (dinfo->cfg.pcie.pcie_location != 0) {
6438 rs = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
6439 PCIER_DEVICE_STA, 2);
6440 if ((rs & (PCIEM_STA_CORRECTABLE_ERROR |
6441 PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
6442 PCIEM_STA_UNSUPPORTED_REQ)) != 0) {
6443 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
6444 PCIER_DEVICE_STA, rs, 2);
6445 device_printf(dev, "Clearing PCIe errors 0x%04x\n", rs);
6451 * Perform a Function Level Reset (FLR) on a device.
6453 * This function first waits for any pending transactions to complete
6454 * within the timeout specified by max_delay. If transactions are
6455 * still pending, the function will return false without attempting a
6458 * If dev is not a PCI-express function or does not support FLR, this
6459 * function returns false.
6461 * Note that no registers are saved or restored. The caller is
6462 * responsible for saving and restoring any registers including
6463 * PCI-standard registers via pci_save_state() and
6464 * pci_restore_state().
6467 pcie_flr(device_t dev, u_int max_delay, bool force)
6469 struct pci_devinfo *dinfo = device_get_ivars(dev);
6474 cap = dinfo->cfg.pcie.pcie_location;
6478 if (!(pci_read_config(dev, cap + PCIER_DEVICE_CAP, 4) & PCIEM_CAP_FLR))
6482 * Disable busmastering to prevent generation of new
6483 * transactions while waiting for the device to go idle. If
6484 * the idle timeout fails, the command register is restored
6485 * which will re-enable busmastering.
6487 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
6488 pci_write_config(dev, PCIR_COMMAND, cmd & ~(PCIM_CMD_BUSMASTEREN), 2);
6489 if (!pcie_wait_for_pending_transactions(dev, max_delay)) {
6491 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
6494 pci_printf(&dinfo->cfg,
6495 "Resetting with transactions pending after %d ms\n",
6499 * Extend the post-FLR delay to cover the maximum
6500 * Completion Timeout delay of anything in flight
6501 * during the FLR delay. Enforce a minimum delay of
6504 compl_delay = pcie_get_max_completion_timeout(dev) / 1000;
6505 if (compl_delay < 10)
6510 /* Initiate the reset. */
6511 ctl = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
6512 pci_write_config(dev, cap + PCIER_DEVICE_CTL, ctl |
6513 PCIEM_CTL_INITIATE_FLR, 2);
6515 /* Wait for 100ms. */
6516 pause_sbt("pcieflr", (100 + compl_delay) * SBT_1MS, 0, C_HARDCLOCK);
6518 if (pci_read_config(dev, cap + PCIER_DEVICE_STA, 2) &
6519 PCIEM_STA_TRANSACTION_PND)
6520 pci_printf(&dinfo->cfg, "Transactions pending after FLR!\n");
6525 * Attempt a power-management reset by cycling the device in/out of D3
6526 * state. PCI spec says we can only go into D3 state from D0 state.
6527 * Transition from D[12] into D0 before going to D3 state.
6530 pci_power_reset(device_t dev)
6534 ps = pci_get_powerstate(dev);
6535 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6536 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6537 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6538 pci_set_powerstate(dev, ps);
6543 * Try link drop and retrain of the downstream port of upstream
6544 * switch, for PCIe. According to the PCIe 3.0 spec 6.6.1, this must
6545 * cause Conventional Hot reset of the device in the slot.
6546 * Alternative, for PCIe, could be the secondary bus reset initiatied
6547 * on the upstream switch PCIR_BRIDGECTL_1, bit 6.
6550 pcie_link_reset(device_t port, int pcie_location)
6554 v = pci_read_config(port, pcie_location + PCIER_LINK_CTL, 2);
6555 v |= PCIEM_LINK_CTL_LINK_DIS;
6556 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6557 pause_sbt("pcier1", mstosbt(20), 0, 0);
6558 v &= ~PCIEM_LINK_CTL_LINK_DIS;
6559 v |= PCIEM_LINK_CTL_RETRAIN_LINK;
6560 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6561 pause_sbt("pcier2", mstosbt(100), 0, 0); /* 100 ms */
6562 v = pci_read_config(port, pcie_location + PCIER_LINK_STA, 2);
6563 return ((v & PCIEM_LINK_STA_TRAINING) != 0 ? ETIMEDOUT : 0);
6567 pci_reset_post(device_t dev, device_t child)
6570 if (dev == device_get_parent(child))
6571 pci_restore_state(child);
6576 pci_reset_prepare(device_t dev, device_t child)
6579 if (dev == device_get_parent(child))
6580 pci_save_state(child);
6585 pci_reset_child(device_t dev, device_t child, int flags)
6589 if (dev == NULL || device_get_parent(child) != dev)
6591 if ((flags & DEVF_RESET_DETACH) != 0) {
6592 error = device_get_state(child) == DS_ATTACHED ?
6593 device_detach(child) : 0;
6595 error = BUS_SUSPEND_CHILD(dev, child);
6598 if (!pcie_flr(child, 1000, false)) {
6599 error = BUS_RESET_PREPARE(dev, child);
6601 pci_power_reset(child);
6602 BUS_RESET_POST(dev, child);
6604 if ((flags & DEVF_RESET_DETACH) != 0)
6605 device_probe_and_attach(child);
6607 BUS_RESUME_CHILD(dev, child);
6612 const struct pci_device_table *
6613 pci_match_device(device_t child, const struct pci_device_table *id, size_t nelt)
6616 uint16_t vendor, device, subvendor, subdevice, class, subclass, revid;
6618 vendor = pci_get_vendor(child);
6619 device = pci_get_device(child);
6620 subvendor = pci_get_subvendor(child);
6621 subdevice = pci_get_subdevice(child);
6622 class = pci_get_class(child);
6623 subclass = pci_get_subclass(child);
6624 revid = pci_get_revid(child);
6625 while (nelt-- > 0) {
6627 if (id->match_flag_vendor)
6628 match &= vendor == id->vendor;
6629 if (id->match_flag_device)
6630 match &= device == id->device;
6631 if (id->match_flag_subvendor)
6632 match &= subvendor == id->subvendor;
6633 if (id->match_flag_subdevice)
6634 match &= subdevice == id->subdevice;
6635 if (id->match_flag_class)
6636 match &= class == id->class_id;
6637 if (id->match_flag_subclass)
6638 match &= subclass == id->subclass;
6639 if (id->match_flag_revid)
6640 match &= revid == id->revid;
6649 pci_print_faulted_dev_name(const struct pci_devinfo *dinfo)
6651 const char *dev_name;
6654 dev = dinfo->cfg.dev;
6655 printf("pci%d:%d:%d:%d", dinfo->cfg.domain, dinfo->cfg.bus,
6656 dinfo->cfg.slot, dinfo->cfg.func);
6657 dev_name = device_get_name(dev);
6658 if (dev_name != NULL)
6659 printf(" (%s%d)", dev_name, device_get_unit(dev));
6663 pci_print_faulted_dev(void)
6665 struct pci_devinfo *dinfo;
6671 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6672 dev = dinfo->cfg.dev;
6673 status = pci_read_config(dev, PCIR_STATUS, 2);
6674 status &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6675 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6676 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6678 pci_print_faulted_dev_name(dinfo);
6679 printf(" error 0x%04x\n", status);
6681 if (dinfo->cfg.pcie.pcie_location != 0) {
6682 status = pci_read_config(dev,
6683 dinfo->cfg.pcie.pcie_location +
6684 PCIER_DEVICE_STA, 2);
6685 if ((status & (PCIEM_STA_CORRECTABLE_ERROR |
6686 PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
6687 PCIEM_STA_UNSUPPORTED_REQ)) != 0) {
6688 pci_print_faulted_dev_name(dinfo);
6689 printf(" PCIe DEVCTL 0x%04x DEVSTA 0x%04x\n",
6690 pci_read_config(dev,
6691 dinfo->cfg.pcie.pcie_location +
6692 PCIER_DEVICE_CTL, 2),
6696 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
6697 r1 = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6698 r2 = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6699 if (r1 != 0 || r2 != 0) {
6700 pci_print_faulted_dev_name(dinfo);
6701 printf(" AER UC 0x%08x Mask 0x%08x Svr 0x%08x\n"
6702 " COR 0x%08x Mask 0x%08x Ctl 0x%08x\n",
6703 r1, pci_read_config(dev, aer +
6704 PCIR_AER_UC_MASK, 4),
6705 pci_read_config(dev, aer +
6706 PCIR_AER_UC_SEVERITY, 4),
6707 r2, pci_read_config(dev, aer +
6708 PCIR_AER_COR_MASK, 4),
6709 pci_read_config(dev, aer +
6710 PCIR_AER_CAP_CONTROL, 4));
6711 for (i = 0; i < 4; i++) {
6712 r1 = pci_read_config(dev, aer +
6713 PCIR_AER_HEADER_LOG + i * 4, 4);
6714 printf(" HL%d: 0x%08x\n", i, r1);
6722 DB_SHOW_COMMAND(pcierr, pci_print_faulted_dev_db)
6725 pci_print_faulted_dev();
6729 db_clear_pcie_errors(const struct pci_devinfo *dinfo)
6735 dev = dinfo->cfg.dev;
6736 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
6737 PCIER_DEVICE_STA, 2);
6738 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
6739 PCIER_DEVICE_STA, r, 2);
6741 if (pci_find_extcap(dev, PCIZ_AER, &aer) != 0)
6743 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6745 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
6746 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6748 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
6751 DB_COMMAND(pci_clearerr, db_pci_clearerr)
6753 struct pci_devinfo *dinfo;
6755 uint16_t status, status1;
6757 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6758 dev = dinfo->cfg.dev;
6759 status1 = status = pci_read_config(dev, PCIR_STATUS, 2);
6760 status1 &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6761 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6762 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6765 pci_write_config(dev, PCIR_STATUS, status, 2);
6767 if (dinfo->cfg.pcie.pcie_location != 0)
6768 db_clear_pcie_errors(dinfo);