2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
5 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
6 * Copyright (c) 2000, BSDi
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/limits.h>
41 #include <sys/linker.h>
42 #include <sys/fcntl.h>
44 #include <sys/kernel.h>
45 #include <sys/queue.h>
46 #include <sys/sysctl.h>
47 #include <sys/endian.h>
51 #include <vm/vm_extern.h>
54 #include <machine/bus.h>
56 #include <machine/resource.h>
57 #include <machine/stdarg.h>
59 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
60 #include <machine/intr_machdep.h>
63 #include <sys/pciio.h>
64 #include <dev/pci/pcireg.h>
65 #include <dev/pci/pcivar.h>
66 #include <dev/pci/pci_private.h>
70 #include <dev/pci/pci_iov_private.h>
73 #include <dev/usb/controller/xhcireg.h>
74 #include <dev/usb/controller/ehcireg.h>
75 #include <dev/usb/controller/ohcireg.h>
76 #include <dev/usb/controller/uhcireg.h>
81 #define PCIR_IS_BIOS(cfg, reg) \
82 (((cfg)->hdrtype == PCIM_HDRTYPE_NORMAL && reg == PCIR_BIOS) || \
83 ((cfg)->hdrtype == PCIM_HDRTYPE_BRIDGE && reg == PCIR_BIOS_1))
85 static int pci_has_quirk(uint32_t devid, int quirk);
86 static pci_addr_t pci_mapbase(uint64_t mapreg);
87 static const char *pci_maptype(uint64_t mapreg);
88 static int pci_maprange(uint64_t mapreg);
89 static pci_addr_t pci_rombase(uint64_t mapreg);
90 static int pci_romsize(uint64_t testval);
91 static void pci_fixancient(pcicfgregs *cfg);
92 static int pci_printf(pcicfgregs *cfg, const char *fmt, ...);
94 static int pci_porten(device_t dev);
95 static int pci_memen(device_t dev);
96 static void pci_assign_interrupt(device_t bus, device_t dev,
98 static int pci_add_map(device_t bus, device_t dev, int reg,
99 struct resource_list *rl, int force, int prefetch);
100 static int pci_probe(device_t dev);
101 static int pci_attach(device_t dev);
102 static int pci_detach(device_t dev);
103 static void pci_load_vendor_data(void);
104 static int pci_describe_parse_line(char **ptr, int *vendor,
105 int *device, char **desc);
106 static char *pci_describe_device(device_t dev);
107 static int pci_modevent(module_t mod, int what, void *arg);
108 static void pci_hdrtypedata(device_t pcib, int b, int s, int f,
110 static void pci_read_cap(device_t pcib, pcicfgregs *cfg);
111 static int pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg,
112 int reg, uint32_t *data);
114 static int pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg,
115 int reg, uint32_t data);
117 static void pci_read_vpd(device_t pcib, pcicfgregs *cfg);
118 static void pci_mask_msix(device_t dev, u_int index);
119 static void pci_unmask_msix(device_t dev, u_int index);
120 static int pci_msi_blacklisted(void);
121 static int pci_msix_blacklisted(void);
122 static void pci_resume_msi(device_t dev);
123 static void pci_resume_msix(device_t dev);
124 static int pci_remap_intr_method(device_t bus, device_t dev,
126 static void pci_hint_device_unit(device_t acdev, device_t child,
127 const char *name, int *unitp);
129 static int pci_get_id_method(device_t dev, device_t child,
130 enum pci_id_type type, uintptr_t *rid);
132 static struct pci_devinfo * pci_fill_devinfo(device_t pcib, device_t bus, int d,
133 int b, int s, int f, uint16_t vid, uint16_t did);
135 static device_method_t pci_methods[] = {
136 /* Device interface */
137 DEVMETHOD(device_probe, pci_probe),
138 DEVMETHOD(device_attach, pci_attach),
139 DEVMETHOD(device_detach, pci_detach),
140 DEVMETHOD(device_shutdown, bus_generic_shutdown),
141 DEVMETHOD(device_suspend, bus_generic_suspend),
142 DEVMETHOD(device_resume, pci_resume),
145 DEVMETHOD(bus_print_child, pci_print_child),
146 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
147 DEVMETHOD(bus_read_ivar, pci_read_ivar),
148 DEVMETHOD(bus_write_ivar, pci_write_ivar),
149 DEVMETHOD(bus_driver_added, pci_driver_added),
150 DEVMETHOD(bus_setup_intr, pci_setup_intr),
151 DEVMETHOD(bus_teardown_intr, pci_teardown_intr),
153 DEVMETHOD(bus_get_dma_tag, pci_get_dma_tag),
154 DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
155 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
156 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
157 DEVMETHOD(bus_delete_resource, pci_delete_resource),
158 DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
159 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
160 DEVMETHOD(bus_release_resource, pci_release_resource),
161 DEVMETHOD(bus_activate_resource, pci_activate_resource),
162 DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource),
163 DEVMETHOD(bus_child_deleted, pci_child_deleted),
164 DEVMETHOD(bus_child_detached, pci_child_detached),
165 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
166 DEVMETHOD(bus_child_location_str, pci_child_location_str_method),
167 DEVMETHOD(bus_hint_device_unit, pci_hint_device_unit),
168 DEVMETHOD(bus_remap_intr, pci_remap_intr_method),
169 DEVMETHOD(bus_suspend_child, pci_suspend_child),
170 DEVMETHOD(bus_resume_child, pci_resume_child),
171 DEVMETHOD(bus_rescan, pci_rescan_method),
174 DEVMETHOD(pci_read_config, pci_read_config_method),
175 DEVMETHOD(pci_write_config, pci_write_config_method),
176 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
177 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
178 DEVMETHOD(pci_enable_io, pci_enable_io_method),
179 DEVMETHOD(pci_disable_io, pci_disable_io_method),
180 DEVMETHOD(pci_get_vpd_ident, pci_get_vpd_ident_method),
181 DEVMETHOD(pci_get_vpd_readonly, pci_get_vpd_readonly_method),
182 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
183 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
184 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
185 DEVMETHOD(pci_find_cap, pci_find_cap_method),
186 DEVMETHOD(pci_find_next_cap, pci_find_next_cap_method),
187 DEVMETHOD(pci_find_extcap, pci_find_extcap_method),
188 DEVMETHOD(pci_find_next_extcap, pci_find_next_extcap_method),
189 DEVMETHOD(pci_find_htcap, pci_find_htcap_method),
190 DEVMETHOD(pci_find_next_htcap, pci_find_next_htcap_method),
191 DEVMETHOD(pci_alloc_msi, pci_alloc_msi_method),
192 DEVMETHOD(pci_alloc_msix, pci_alloc_msix_method),
193 DEVMETHOD(pci_enable_msi, pci_enable_msi_method),
194 DEVMETHOD(pci_enable_msix, pci_enable_msix_method),
195 DEVMETHOD(pci_disable_msi, pci_disable_msi_method),
196 DEVMETHOD(pci_remap_msix, pci_remap_msix_method),
197 DEVMETHOD(pci_release_msi, pci_release_msi_method),
198 DEVMETHOD(pci_msi_count, pci_msi_count_method),
199 DEVMETHOD(pci_msix_count, pci_msix_count_method),
200 DEVMETHOD(pci_msix_pba_bar, pci_msix_pba_bar_method),
201 DEVMETHOD(pci_msix_table_bar, pci_msix_table_bar_method),
202 DEVMETHOD(pci_get_id, pci_get_id_method),
203 DEVMETHOD(pci_alloc_devinfo, pci_alloc_devinfo_method),
204 DEVMETHOD(pci_child_added, pci_child_added_method),
206 DEVMETHOD(pci_iov_attach, pci_iov_attach_method),
207 DEVMETHOD(pci_iov_detach, pci_iov_detach_method),
208 DEVMETHOD(pci_create_iov_child, pci_create_iov_child_method),
214 DEFINE_CLASS_0(pci, pci_driver, pci_methods, sizeof(struct pci_softc));
216 static devclass_t pci_devclass;
217 DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, NULL);
218 MODULE_VERSION(pci, 1);
220 static char *pci_vendordata;
221 static size_t pci_vendordata_size;
224 uint32_t devid; /* Vendor/device of the card */
226 #define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */
227 #define PCI_QUIRK_DISABLE_MSI 2 /* Neither MSI nor MSI-X work */
228 #define PCI_QUIRK_ENABLE_MSI_VM 3 /* Older chipset in VM where MSI works */
229 #define PCI_QUIRK_UNMAP_REG 4 /* Ignore PCI map register */
230 #define PCI_QUIRK_DISABLE_MSIX 5 /* MSI-X doesn't work */
231 #define PCI_QUIRK_MSI_INTX_BUG 6 /* PCIM_CMD_INTxDIS disables MSI */
236 static const struct pci_quirk pci_quirks[] = {
237 /* The Intel 82371AB and 82443MX have a map register at offset 0x90. */
238 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 },
239 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 },
240 /* As does the Serverworks OSB4 (the SMBus mapping register) */
241 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 },
244 * MSI doesn't work with the ServerWorks CNB20-HE Host Bridge
245 * or the CMIC-SL (AKA ServerWorks GC_LE).
247 { 0x00141166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
248 { 0x00171166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
251 * MSI doesn't work on earlier Intel chipsets including
252 * E7500, E7501, E7505, 845, 865, 875/E7210, and 855.
254 { 0x25408086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
255 { 0x254c8086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
256 { 0x25508086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
257 { 0x25608086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
258 { 0x25708086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
259 { 0x25788086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
260 { 0x35808086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
263 * MSI doesn't work with devices behind the AMD 8131 HT-PCIX
266 { 0x74501022, PCI_QUIRK_DISABLE_MSI, 0, 0 },
269 * MSI-X allocation doesn't work properly for devices passed through
270 * by VMware up to at least ESXi 5.1.
272 { 0x079015ad, PCI_QUIRK_DISABLE_MSIX, 0, 0 }, /* PCI/PCI-X */
273 { 0x07a015ad, PCI_QUIRK_DISABLE_MSIX, 0, 0 }, /* PCIe */
276 * Some virtualization environments emulate an older chipset
277 * but support MSI just fine. QEMU uses the Intel 82440.
279 { 0x12378086, PCI_QUIRK_ENABLE_MSI_VM, 0, 0 },
282 * HPET MMIO base address may appear in Bar1 for AMD SB600 SMBus
283 * controller depending on SoftPciRst register (PM_IO 0x55 [7]).
284 * It prevents us from attaching hpet(4) when the bit is unset.
285 * Note this quirk only affects SB600 revision A13 and earlier.
286 * For SB600 A21 and later, firmware must set the bit to hide it.
287 * For SB700 and later, it is unused and hardcoded to zero.
289 { 0x43851002, PCI_QUIRK_UNMAP_REG, 0x14, 0 },
292 * Atheros AR8161/AR8162/E2200/E2400/E2500 Ethernet controllers have
293 * a bug that MSI interrupt does not assert if PCIM_CMD_INTxDIS bit
294 * of the command register is set.
296 { 0x10911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
297 { 0xE0911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
298 { 0xE0A11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
299 { 0xE0B11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
300 { 0x10901969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
303 * Broadcom BCM5714(S)/BCM5715(S)/BCM5780(S) Ethernet MACs don't
304 * issue MSI interrupts with PCIM_CMD_INTxDIS set either.
306 { 0x166814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714 */
307 { 0x166914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714S */
308 { 0x166a14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780 */
309 { 0x166b14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780S */
310 { 0x167814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715 */
311 { 0x167914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715S */
316 /* map register information */
317 #define PCI_MAPMEM 0x01 /* memory map */
318 #define PCI_MAPMEMP 0x02 /* prefetchable memory map */
319 #define PCI_MAPPORT 0x04 /* port map */
321 struct devlist pci_devq;
322 uint32_t pci_generation;
323 uint32_t pci_numdevs = 0;
324 static int pcie_chipset, pcix_chipset;
327 SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD, 0, "PCI bus tuning parameters");
329 static int pci_enable_io_modes = 1;
330 SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RWTUN,
331 &pci_enable_io_modes, 1,
332 "Enable I/O and memory bits in the config register. Some BIOSes do not"
333 " enable these bits correctly. We'd like to do this all the time, but"
334 " there are some peripherals that this causes problems with.");
336 static int pci_do_realloc_bars = 0;
337 SYSCTL_INT(_hw_pci, OID_AUTO, realloc_bars, CTLFLAG_RWTUN,
338 &pci_do_realloc_bars, 0,
339 "Attempt to allocate a new range for any BARs whose original "
340 "firmware-assigned ranges fail to allocate during the initial device scan.");
342 static int pci_do_power_nodriver = 0;
343 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_nodriver, CTLFLAG_RWTUN,
344 &pci_do_power_nodriver, 0,
345 "Place a function into D3 state when no driver attaches to it. 0 means"
346 " disable. 1 means conservatively place devices into D3 state. 2 means"
347 " aggressively place devices into D3 state. 3 means put absolutely"
348 " everything in D3 state.");
350 int pci_do_power_resume = 1;
351 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_resume, CTLFLAG_RWTUN,
352 &pci_do_power_resume, 1,
353 "Transition from D3 -> D0 on resume.");
355 int pci_do_power_suspend = 1;
356 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_suspend, CTLFLAG_RWTUN,
357 &pci_do_power_suspend, 1,
358 "Transition from D0 -> D3 on suspend.");
360 static int pci_do_msi = 1;
361 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msi, CTLFLAG_RWTUN, &pci_do_msi, 1,
362 "Enable support for MSI interrupts");
364 static int pci_do_msix = 1;
365 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msix, CTLFLAG_RWTUN, &pci_do_msix, 1,
366 "Enable support for MSI-X interrupts");
368 static int pci_msix_rewrite_table = 0;
369 SYSCTL_INT(_hw_pci, OID_AUTO, msix_rewrite_table, CTLFLAG_RWTUN,
370 &pci_msix_rewrite_table, 0,
371 "Rewrite entire MSI-X table when updating MSI-X entries");
373 static int pci_honor_msi_blacklist = 1;
374 SYSCTL_INT(_hw_pci, OID_AUTO, honor_msi_blacklist, CTLFLAG_RDTUN,
375 &pci_honor_msi_blacklist, 1, "Honor chipset blacklist for MSI/MSI-X");
377 #if defined(__i386__) || defined(__amd64__)
378 static int pci_usb_takeover = 1;
380 static int pci_usb_takeover = 0;
382 SYSCTL_INT(_hw_pci, OID_AUTO, usb_early_takeover, CTLFLAG_RDTUN,
383 &pci_usb_takeover, 1,
384 "Enable early takeover of USB controllers. Disable this if you depend on"
385 " BIOS emulation of USB devices, that is you use USB devices (like"
386 " keyboard or mouse) but do not load USB drivers");
388 static int pci_clear_bars;
389 SYSCTL_INT(_hw_pci, OID_AUTO, clear_bars, CTLFLAG_RDTUN, &pci_clear_bars, 0,
390 "Ignore firmware-assigned resources for BARs.");
392 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
393 static int pci_clear_buses;
394 SYSCTL_INT(_hw_pci, OID_AUTO, clear_buses, CTLFLAG_RDTUN, &pci_clear_buses, 0,
395 "Ignore firmware-assigned bus numbers.");
398 static int pci_enable_ari = 1;
399 SYSCTL_INT(_hw_pci, OID_AUTO, enable_ari, CTLFLAG_RDTUN, &pci_enable_ari,
400 0, "Enable support for PCIe Alternative RID Interpretation");
403 pci_has_quirk(uint32_t devid, int quirk)
405 const struct pci_quirk *q;
407 for (q = &pci_quirks[0]; q->devid; q++) {
408 if (q->devid == devid && q->type == quirk)
414 /* Find a device_t by bus/slot/function in domain 0 */
417 pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func)
420 return (pci_find_dbsf(0, bus, slot, func));
423 /* Find a device_t by domain/bus/slot/function */
426 pci_find_dbsf(uint32_t domain, uint8_t bus, uint8_t slot, uint8_t func)
428 struct pci_devinfo *dinfo;
430 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
431 if ((dinfo->cfg.domain == domain) &&
432 (dinfo->cfg.bus == bus) &&
433 (dinfo->cfg.slot == slot) &&
434 (dinfo->cfg.func == func)) {
435 return (dinfo->cfg.dev);
442 /* Find a device_t by vendor/device ID */
445 pci_find_device(uint16_t vendor, uint16_t device)
447 struct pci_devinfo *dinfo;
449 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
450 if ((dinfo->cfg.vendor == vendor) &&
451 (dinfo->cfg.device == device)) {
452 return (dinfo->cfg.dev);
460 pci_find_class(uint8_t class, uint8_t subclass)
462 struct pci_devinfo *dinfo;
464 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
465 if (dinfo->cfg.baseclass == class &&
466 dinfo->cfg.subclass == subclass) {
467 return (dinfo->cfg.dev);
475 pci_printf(pcicfgregs *cfg, const char *fmt, ...)
480 retval = printf("pci%d:%d:%d:%d: ", cfg->domain, cfg->bus, cfg->slot,
483 retval += vprintf(fmt, ap);
488 /* return base address of memory or port map */
491 pci_mapbase(uint64_t mapreg)
494 if (PCI_BAR_MEM(mapreg))
495 return (mapreg & PCIM_BAR_MEM_BASE);
497 return (mapreg & PCIM_BAR_IO_BASE);
500 /* return map type of memory or port map */
503 pci_maptype(uint64_t mapreg)
506 if (PCI_BAR_IO(mapreg))
508 if (mapreg & PCIM_BAR_MEM_PREFETCH)
509 return ("Prefetchable Memory");
513 /* return log2 of map size decoded for memory or port map */
516 pci_mapsize(uint64_t testval)
520 testval = pci_mapbase(testval);
523 while ((testval & 1) == 0)
532 /* return base address of device ROM */
535 pci_rombase(uint64_t mapreg)
538 return (mapreg & PCIM_BIOS_ADDR_MASK);
541 /* return log2 of map size decided for device ROM */
544 pci_romsize(uint64_t testval)
548 testval = pci_rombase(testval);
551 while ((testval & 1) == 0)
560 /* return log2 of address range supported by map register */
563 pci_maprange(uint64_t mapreg)
567 if (PCI_BAR_IO(mapreg))
570 switch (mapreg & PCIM_BAR_MEM_TYPE) {
571 case PCIM_BAR_MEM_32:
574 case PCIM_BAR_MEM_1MB:
577 case PCIM_BAR_MEM_64:
584 /* adjust some values from PCI 1.0 devices to match 2.0 standards ... */
587 pci_fixancient(pcicfgregs *cfg)
589 if ((cfg->hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL)
592 /* PCI to PCI bridges use header type 1 */
593 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI)
594 cfg->hdrtype = PCIM_HDRTYPE_BRIDGE;
597 /* extract header type specific config data */
600 pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg)
602 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
603 switch (cfg->hdrtype & PCIM_HDRTYPE) {
604 case PCIM_HDRTYPE_NORMAL:
605 cfg->subvendor = REG(PCIR_SUBVEND_0, 2);
606 cfg->subdevice = REG(PCIR_SUBDEV_0, 2);
607 cfg->mingnt = REG(PCIR_MINGNT, 1);
608 cfg->maxlat = REG(PCIR_MAXLAT, 1);
609 cfg->nummaps = PCI_MAXMAPS_0;
611 case PCIM_HDRTYPE_BRIDGE:
612 cfg->bridge.br_seclat = REG(PCIR_SECLAT_1, 1);
613 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_1, 1);
614 cfg->bridge.br_secbus = REG(PCIR_SECBUS_1, 1);
615 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_1, 1);
616 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_1, 2);
617 cfg->nummaps = PCI_MAXMAPS_1;
619 case PCIM_HDRTYPE_CARDBUS:
620 cfg->bridge.br_seclat = REG(PCIR_SECLAT_2, 1);
621 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_2, 1);
622 cfg->bridge.br_secbus = REG(PCIR_SECBUS_2, 1);
623 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_2, 1);
624 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_2, 2);
625 cfg->subvendor = REG(PCIR_SUBVEND_2, 2);
626 cfg->subdevice = REG(PCIR_SUBDEV_2, 2);
627 cfg->nummaps = PCI_MAXMAPS_2;
633 /* read configuration header into pcicfgregs structure */
635 pci_read_device(device_t pcib, device_t bus, int d, int b, int s, int f)
637 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
640 vid = REG(PCIR_VENDOR, 2);
641 did = REG(PCIR_DEVICE, 2);
643 return (pci_fill_devinfo(pcib, bus, d, b, s, f, vid, did));
649 pci_alloc_devinfo_method(device_t dev)
652 return (malloc(sizeof(struct pci_devinfo), M_DEVBUF,
656 static struct pci_devinfo *
657 pci_fill_devinfo(device_t pcib, device_t bus, int d, int b, int s, int f,
658 uint16_t vid, uint16_t did)
660 struct pci_devinfo *devlist_entry;
663 devlist_entry = PCI_ALLOC_DEVINFO(bus);
665 cfg = &devlist_entry->cfg;
673 cfg->cmdreg = REG(PCIR_COMMAND, 2);
674 cfg->statreg = REG(PCIR_STATUS, 2);
675 cfg->baseclass = REG(PCIR_CLASS, 1);
676 cfg->subclass = REG(PCIR_SUBCLASS, 1);
677 cfg->progif = REG(PCIR_PROGIF, 1);
678 cfg->revid = REG(PCIR_REVID, 1);
679 cfg->hdrtype = REG(PCIR_HDRTYPE, 1);
680 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1);
681 cfg->lattimer = REG(PCIR_LATTIMER, 1);
682 cfg->intpin = REG(PCIR_INTPIN, 1);
683 cfg->intline = REG(PCIR_INTLINE, 1);
685 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0;
686 cfg->hdrtype &= ~PCIM_MFDEV;
687 STAILQ_INIT(&cfg->maps);
692 pci_hdrtypedata(pcib, b, s, f, cfg);
694 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT)
695 pci_read_cap(pcib, cfg);
697 STAILQ_INSERT_TAIL(&pci_devq, devlist_entry, pci_links);
699 devlist_entry->conf.pc_sel.pc_domain = cfg->domain;
700 devlist_entry->conf.pc_sel.pc_bus = cfg->bus;
701 devlist_entry->conf.pc_sel.pc_dev = cfg->slot;
702 devlist_entry->conf.pc_sel.pc_func = cfg->func;
703 devlist_entry->conf.pc_hdr = cfg->hdrtype;
705 devlist_entry->conf.pc_subvendor = cfg->subvendor;
706 devlist_entry->conf.pc_subdevice = cfg->subdevice;
707 devlist_entry->conf.pc_vendor = cfg->vendor;
708 devlist_entry->conf.pc_device = cfg->device;
710 devlist_entry->conf.pc_class = cfg->baseclass;
711 devlist_entry->conf.pc_subclass = cfg->subclass;
712 devlist_entry->conf.pc_progif = cfg->progif;
713 devlist_entry->conf.pc_revid = cfg->revid;
718 return (devlist_entry);
723 pci_ea_fill_info(device_t pcib, pcicfgregs *cfg)
725 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, \
726 cfg->ea.ea_location + (n), w)
733 uint64_t base, max_offset;
734 struct pci_ea_entry *eae;
736 if (cfg->ea.ea_location == 0)
739 STAILQ_INIT(&cfg->ea.ea_entries);
741 /* Determine the number of entries */
742 num_ent = REG(PCIR_EA_NUM_ENT, 2);
743 num_ent &= PCIM_EA_NUM_ENT_MASK;
745 /* Find the first entry to care of */
746 ptr = PCIR_EA_FIRST_ENT;
748 /* Skip DWORD 2 for type 1 functions */
749 if ((cfg->hdrtype & PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE)
752 for (a = 0; a < num_ent; a++) {
754 eae = malloc(sizeof(*eae), M_DEVBUF, M_WAITOK | M_ZERO);
755 eae->eae_cfg_offset = cfg->ea.ea_location + ptr;
757 /* Read a number of dwords in the entry */
760 ent_size = (val & PCIM_EA_ES);
762 for (b = 0; b < ent_size; b++) {
767 eae->eae_flags = val;
768 eae->eae_bei = (PCIM_EA_BEI & val) >> PCIM_EA_BEI_OFFSET;
770 base = dw[0] & PCIM_EA_FIELD_MASK;
771 max_offset = dw[1] | ~PCIM_EA_FIELD_MASK;
773 if (((dw[0] & PCIM_EA_IS_64) != 0) && (b < ent_size)) {
774 base |= (uint64_t)dw[b] << 32UL;
777 if (((dw[1] & PCIM_EA_IS_64) != 0)
779 max_offset |= (uint64_t)dw[b] << 32UL;
783 eae->eae_base = base;
784 eae->eae_max_offset = max_offset;
786 STAILQ_INSERT_TAIL(&cfg->ea.ea_entries, eae, eae_link);
789 printf("PCI(EA) dev %04x:%04x, bei %d, flags #%x, base #%jx, max_offset #%jx\n",
790 cfg->vendor, cfg->device, eae->eae_bei, eae->eae_flags,
791 (uintmax_t)eae->eae_base, (uintmax_t)eae->eae_max_offset);
798 pci_read_cap(device_t pcib, pcicfgregs *cfg)
800 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w)
801 #define WREG(n, v, w) PCIB_WRITE_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, v, w)
802 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
806 int ptr, nextptr, ptrptr;
808 switch (cfg->hdrtype & PCIM_HDRTYPE) {
809 case PCIM_HDRTYPE_NORMAL:
810 case PCIM_HDRTYPE_BRIDGE:
811 ptrptr = PCIR_CAP_PTR;
813 case PCIM_HDRTYPE_CARDBUS:
814 ptrptr = PCIR_CAP_PTR_2; /* cardbus capabilities ptr */
817 return; /* no extended capabilities support */
819 nextptr = REG(ptrptr, 1); /* sanity check? */
822 * Read capability entries.
824 while (nextptr != 0) {
827 printf("illegal PCI extended capability offset %d\n",
831 /* Find the next entry */
833 nextptr = REG(ptr + PCICAP_NEXTPTR, 1);
835 /* Process this entry */
836 switch (REG(ptr + PCICAP_ID, 1)) {
837 case PCIY_PMG: /* PCI power management */
838 if (cfg->pp.pp_cap == 0) {
839 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2);
840 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS;
841 cfg->pp.pp_bse = ptr + PCIR_POWER_BSE;
842 if ((nextptr - ptr) > PCIR_POWER_DATA)
843 cfg->pp.pp_data = ptr + PCIR_POWER_DATA;
846 case PCIY_HT: /* HyperTransport */
847 /* Determine HT-specific capability type. */
848 val = REG(ptr + PCIR_HT_COMMAND, 2);
850 if ((val & 0xe000) == PCIM_HTCAP_SLAVE)
851 cfg->ht.ht_slave = ptr;
853 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
854 switch (val & PCIM_HTCMD_CAP_MASK) {
855 case PCIM_HTCAP_MSI_MAPPING:
856 if (!(val & PCIM_HTCMD_MSI_FIXED)) {
857 /* Sanity check the mapping window. */
858 addr = REG(ptr + PCIR_HTMSI_ADDRESS_HI,
861 addr |= REG(ptr + PCIR_HTMSI_ADDRESS_LO,
863 if (addr != MSI_INTEL_ADDR_BASE)
865 "HT device at pci%d:%d:%d:%d has non-default MSI window 0x%llx\n",
866 cfg->domain, cfg->bus,
867 cfg->slot, cfg->func,
870 addr = MSI_INTEL_ADDR_BASE;
872 cfg->ht.ht_msimap = ptr;
873 cfg->ht.ht_msictrl = val;
874 cfg->ht.ht_msiaddr = addr;
879 case PCIY_MSI: /* PCI MSI */
880 cfg->msi.msi_location = ptr;
881 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2);
882 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl &
883 PCIM_MSICTRL_MMC_MASK)>>1);
885 case PCIY_MSIX: /* PCI MSI-X */
886 cfg->msix.msix_location = ptr;
887 cfg->msix.msix_ctrl = REG(ptr + PCIR_MSIX_CTRL, 2);
888 cfg->msix.msix_msgnum = (cfg->msix.msix_ctrl &
889 PCIM_MSIXCTRL_TABLE_SIZE) + 1;
890 val = REG(ptr + PCIR_MSIX_TABLE, 4);
891 cfg->msix.msix_table_bar = PCIR_BAR(val &
893 cfg->msix.msix_table_offset = val & ~PCIM_MSIX_BIR_MASK;
894 val = REG(ptr + PCIR_MSIX_PBA, 4);
895 cfg->msix.msix_pba_bar = PCIR_BAR(val &
897 cfg->msix.msix_pba_offset = val & ~PCIM_MSIX_BIR_MASK;
899 case PCIY_VPD: /* PCI Vital Product Data */
900 cfg->vpd.vpd_reg = ptr;
903 /* Should always be true. */
904 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
905 PCIM_HDRTYPE_BRIDGE) {
906 val = REG(ptr + PCIR_SUBVENDCAP_ID, 4);
907 cfg->subvendor = val & 0xffff;
908 cfg->subdevice = val >> 16;
911 case PCIY_PCIX: /* PCI-X */
913 * Assume we have a PCI-X chipset if we have
914 * at least one PCI-PCI bridge with a PCI-X
915 * capability. Note that some systems with
916 * PCI-express or HT chipsets might match on
917 * this check as well.
919 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
922 cfg->pcix.pcix_location = ptr;
924 case PCIY_EXPRESS: /* PCI-express */
926 * Assume we have a PCI-express chipset if we have
927 * at least one PCI-express device.
930 cfg->pcie.pcie_location = ptr;
931 val = REG(ptr + PCIER_FLAGS, 2);
932 cfg->pcie.pcie_type = val & PCIEM_FLAGS_TYPE;
934 case PCIY_EA: /* Enhanced Allocation */
935 cfg->ea.ea_location = ptr;
936 pci_ea_fill_info(pcib, cfg);
943 #if defined(__powerpc__)
945 * Enable the MSI mapping window for all HyperTransport
946 * slaves. PCI-PCI bridges have their windows enabled via
949 if (cfg->ht.ht_slave != 0 && cfg->ht.ht_msimap != 0 &&
950 !(cfg->ht.ht_msictrl & PCIM_HTCMD_MSI_ENABLE)) {
952 "Enabling MSI window for HyperTransport slave at pci%d:%d:%d:%d\n",
953 cfg->domain, cfg->bus, cfg->slot, cfg->func);
954 cfg->ht.ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
955 WREG(cfg->ht.ht_msimap + PCIR_HT_COMMAND, cfg->ht.ht_msictrl,
959 /* REG and WREG use carry through to next functions */
963 * PCI Vital Product Data
966 #define PCI_VPD_TIMEOUT 1000000
969 pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t *data)
971 int count = PCI_VPD_TIMEOUT;
973 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
975 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg, 2);
977 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) != 0x8000) {
980 DELAY(1); /* limit looping */
982 *data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4));
989 pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t data)
991 int count = PCI_VPD_TIMEOUT;
993 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
995 WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4);
996 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg | 0x8000, 2);
997 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) == 0x8000) {
1000 DELAY(1); /* limit looping */
1007 #undef PCI_VPD_TIMEOUT
1009 struct vpd_readstate {
1019 vpd_nextbyte(struct vpd_readstate *vrs, uint8_t *data)
1024 if (vrs->bytesinval == 0) {
1025 if (pci_read_vpd_reg(vrs->pcib, vrs->cfg, vrs->off, ®))
1027 vrs->val = le32toh(reg);
1029 byte = vrs->val & 0xff;
1030 vrs->bytesinval = 3;
1032 vrs->val = vrs->val >> 8;
1033 byte = vrs->val & 0xff;
1043 pci_read_vpd(device_t pcib, pcicfgregs *cfg)
1045 struct vpd_readstate vrs;
1050 int alloc, off; /* alloc/off for RO/W arrays */
1056 /* init vpd reader */
1064 name = remain = i = 0; /* shut up stupid gcc */
1065 alloc = off = 0; /* shut up stupid gcc */
1066 dflen = 0; /* shut up stupid gcc */
1068 while (state >= 0) {
1069 if (vpd_nextbyte(&vrs, &byte)) {
1074 printf("vpd: val: %#x, off: %d, bytesinval: %d, byte: %#hhx, " \
1075 "state: %d, remain: %d, name: %#x, i: %d\n", vrs.val,
1076 vrs.off, vrs.bytesinval, byte, state, remain, name, i);
1079 case 0: /* item name */
1081 if (vpd_nextbyte(&vrs, &byte2)) {
1086 if (vpd_nextbyte(&vrs, &byte2)) {
1090 remain |= byte2 << 8;
1091 if (remain > (0x7f*4 - vrs.off)) {
1094 "invalid VPD data, remain %#x\n",
1099 remain = byte & 0x7;
1100 name = (byte >> 3) & 0xf;
1103 case 0x2: /* String */
1104 cfg->vpd.vpd_ident = malloc(remain + 1,
1105 M_DEVBUF, M_WAITOK);
1112 case 0x10: /* VPD-R */
1115 cfg->vpd.vpd_ros = malloc(alloc *
1116 sizeof(*cfg->vpd.vpd_ros), M_DEVBUF,
1120 case 0x11: /* VPD-W */
1123 cfg->vpd.vpd_w = malloc(alloc *
1124 sizeof(*cfg->vpd.vpd_w), M_DEVBUF,
1128 default: /* Invalid data, abort */
1134 case 1: /* Identifier String */
1135 cfg->vpd.vpd_ident[i++] = byte;
1138 cfg->vpd.vpd_ident[i] = '\0';
1143 case 2: /* VPD-R Keyword Header */
1145 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1146 (alloc *= 2) * sizeof(*cfg->vpd.vpd_ros),
1147 M_DEVBUF, M_WAITOK | M_ZERO);
1149 cfg->vpd.vpd_ros[off].keyword[0] = byte;
1150 if (vpd_nextbyte(&vrs, &byte2)) {
1154 cfg->vpd.vpd_ros[off].keyword[1] = byte2;
1155 if (vpd_nextbyte(&vrs, &byte2)) {
1159 cfg->vpd.vpd_ros[off].len = dflen = byte2;
1161 strncmp(cfg->vpd.vpd_ros[off].keyword, "RV",
1164 * if this happens, we can't trust the rest
1167 pci_printf(cfg, "bad keyword length: %d\n",
1172 } else if (dflen == 0) {
1173 cfg->vpd.vpd_ros[off].value = malloc(1 *
1174 sizeof(*cfg->vpd.vpd_ros[off].value),
1175 M_DEVBUF, M_WAITOK);
1176 cfg->vpd.vpd_ros[off].value[0] = '\x00';
1178 cfg->vpd.vpd_ros[off].value = malloc(
1180 sizeof(*cfg->vpd.vpd_ros[off].value),
1181 M_DEVBUF, M_WAITOK);
1184 /* keep in sync w/ state 3's transistions */
1185 if (dflen == 0 && remain == 0)
1187 else if (dflen == 0)
1193 case 3: /* VPD-R Keyword Value */
1194 cfg->vpd.vpd_ros[off].value[i++] = byte;
1195 if (strncmp(cfg->vpd.vpd_ros[off].keyword,
1196 "RV", 2) == 0 && cksumvalid == -1) {
1202 "bad VPD cksum, remain %hhu\n",
1211 /* keep in sync w/ state 2's transistions */
1213 cfg->vpd.vpd_ros[off++].value[i++] = '\0';
1214 if (dflen == 0 && remain == 0) {
1215 cfg->vpd.vpd_rocnt = off;
1216 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1217 off * sizeof(*cfg->vpd.vpd_ros),
1218 M_DEVBUF, M_WAITOK | M_ZERO);
1220 } else if (dflen == 0)
1230 case 5: /* VPD-W Keyword Header */
1232 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1233 (alloc *= 2) * sizeof(*cfg->vpd.vpd_w),
1234 M_DEVBUF, M_WAITOK | M_ZERO);
1236 cfg->vpd.vpd_w[off].keyword[0] = byte;
1237 if (vpd_nextbyte(&vrs, &byte2)) {
1241 cfg->vpd.vpd_w[off].keyword[1] = byte2;
1242 if (vpd_nextbyte(&vrs, &byte2)) {
1246 cfg->vpd.vpd_w[off].len = dflen = byte2;
1247 cfg->vpd.vpd_w[off].start = vrs.off - vrs.bytesinval;
1248 cfg->vpd.vpd_w[off].value = malloc((dflen + 1) *
1249 sizeof(*cfg->vpd.vpd_w[off].value),
1250 M_DEVBUF, M_WAITOK);
1253 /* keep in sync w/ state 6's transistions */
1254 if (dflen == 0 && remain == 0)
1256 else if (dflen == 0)
1262 case 6: /* VPD-W Keyword Value */
1263 cfg->vpd.vpd_w[off].value[i++] = byte;
1266 /* keep in sync w/ state 5's transistions */
1268 cfg->vpd.vpd_w[off++].value[i++] = '\0';
1269 if (dflen == 0 && remain == 0) {
1270 cfg->vpd.vpd_wcnt = off;
1271 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1272 off * sizeof(*cfg->vpd.vpd_w),
1273 M_DEVBUF, M_WAITOK | M_ZERO);
1275 } else if (dflen == 0)
1280 pci_printf(cfg, "invalid state: %d\n", state);
1286 if (cksumvalid == 0 || state < -1) {
1287 /* read-only data bad, clean up */
1288 if (cfg->vpd.vpd_ros != NULL) {
1289 for (off = 0; cfg->vpd.vpd_ros[off].value; off++)
1290 free(cfg->vpd.vpd_ros[off].value, M_DEVBUF);
1291 free(cfg->vpd.vpd_ros, M_DEVBUF);
1292 cfg->vpd.vpd_ros = NULL;
1296 /* I/O error, clean up */
1297 pci_printf(cfg, "failed to read VPD data.\n");
1298 if (cfg->vpd.vpd_ident != NULL) {
1299 free(cfg->vpd.vpd_ident, M_DEVBUF);
1300 cfg->vpd.vpd_ident = NULL;
1302 if (cfg->vpd.vpd_w != NULL) {
1303 for (off = 0; cfg->vpd.vpd_w[off].value; off++)
1304 free(cfg->vpd.vpd_w[off].value, M_DEVBUF);
1305 free(cfg->vpd.vpd_w, M_DEVBUF);
1306 cfg->vpd.vpd_w = NULL;
1309 cfg->vpd.vpd_cached = 1;
1315 pci_get_vpd_ident_method(device_t dev, device_t child, const char **identptr)
1317 struct pci_devinfo *dinfo = device_get_ivars(child);
1318 pcicfgregs *cfg = &dinfo->cfg;
1320 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1321 pci_read_vpd(device_get_parent(dev), cfg);
1323 *identptr = cfg->vpd.vpd_ident;
1325 if (*identptr == NULL)
1332 pci_get_vpd_readonly_method(device_t dev, device_t child, const char *kw,
1335 struct pci_devinfo *dinfo = device_get_ivars(child);
1336 pcicfgregs *cfg = &dinfo->cfg;
1339 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1340 pci_read_vpd(device_get_parent(dev), cfg);
1342 for (i = 0; i < cfg->vpd.vpd_rocnt; i++)
1343 if (memcmp(kw, cfg->vpd.vpd_ros[i].keyword,
1344 sizeof(cfg->vpd.vpd_ros[i].keyword)) == 0) {
1345 *vptr = cfg->vpd.vpd_ros[i].value;
1354 pci_fetch_vpd_list(device_t dev)
1356 struct pci_devinfo *dinfo = device_get_ivars(dev);
1357 pcicfgregs *cfg = &dinfo->cfg;
1359 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1360 pci_read_vpd(device_get_parent(device_get_parent(dev)), cfg);
1365 * Find the requested HyperTransport capability and return the offset
1366 * in configuration space via the pointer provided. The function
1367 * returns 0 on success and an error code otherwise.
1370 pci_find_htcap_method(device_t dev, device_t child, int capability, int *capreg)
1375 error = pci_find_cap(child, PCIY_HT, &ptr);
1380 * Traverse the capabilities list checking each HT capability
1381 * to see if it matches the requested HT capability.
1384 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1385 if (capability == PCIM_HTCAP_SLAVE ||
1386 capability == PCIM_HTCAP_HOST)
1389 val &= PCIM_HTCMD_CAP_MASK;
1390 if (val == capability) {
1396 /* Skip to the next HT capability. */
1397 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1405 * Find the next requested HyperTransport capability after start and return
1406 * the offset in configuration space via the pointer provided. The function
1407 * returns 0 on success and an error code otherwise.
1410 pci_find_next_htcap_method(device_t dev, device_t child, int capability,
1411 int start, int *capreg)
1416 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == PCIY_HT,
1417 ("start capability is not HyperTransport capability"));
1421 * Traverse the capabilities list checking each HT capability
1422 * to see if it matches the requested HT capability.
1425 /* Skip to the next HT capability. */
1426 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1429 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1430 if (capability == PCIM_HTCAP_SLAVE ||
1431 capability == PCIM_HTCAP_HOST)
1434 val &= PCIM_HTCMD_CAP_MASK;
1435 if (val == capability) {
1446 * Find the requested capability and return the offset in
1447 * configuration space via the pointer provided. The function returns
1448 * 0 on success and an error code otherwise.
1451 pci_find_cap_method(device_t dev, device_t child, int capability,
1454 struct pci_devinfo *dinfo = device_get_ivars(child);
1455 pcicfgregs *cfg = &dinfo->cfg;
1460 * Check the CAP_LIST bit of the PCI status register first.
1462 status = pci_read_config(child, PCIR_STATUS, 2);
1463 if (!(status & PCIM_STATUS_CAPPRESENT))
1467 * Determine the start pointer of the capabilities list.
1469 switch (cfg->hdrtype & PCIM_HDRTYPE) {
1470 case PCIM_HDRTYPE_NORMAL:
1471 case PCIM_HDRTYPE_BRIDGE:
1474 case PCIM_HDRTYPE_CARDBUS:
1475 ptr = PCIR_CAP_PTR_2;
1479 return (ENXIO); /* no extended capabilities support */
1481 ptr = pci_read_config(child, ptr, 1);
1484 * Traverse the capabilities list.
1487 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1492 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1499 * Find the next requested capability after start and return the offset in
1500 * configuration space via the pointer provided. The function returns
1501 * 0 on success and an error code otherwise.
1504 pci_find_next_cap_method(device_t dev, device_t child, int capability,
1505 int start, int *capreg)
1509 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == capability,
1510 ("start capability is not expected capability"));
1512 ptr = pci_read_config(child, start + PCICAP_NEXTPTR, 1);
1514 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1519 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1526 * Find the requested extended capability and return the offset in
1527 * configuration space via the pointer provided. The function returns
1528 * 0 on success and an error code otherwise.
1531 pci_find_extcap_method(device_t dev, device_t child, int capability,
1534 struct pci_devinfo *dinfo = device_get_ivars(child);
1535 pcicfgregs *cfg = &dinfo->cfg;
1539 /* Only supported for PCI-express devices. */
1540 if (cfg->pcie.pcie_location == 0)
1544 ecap = pci_read_config(child, ptr, 4);
1545 if (ecap == 0xffffffff || ecap == 0)
1548 if (PCI_EXTCAP_ID(ecap) == capability) {
1553 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1556 ecap = pci_read_config(child, ptr, 4);
1563 * Find the next requested extended capability after start and return the
1564 * offset in configuration space via the pointer provided. The function
1565 * returns 0 on success and an error code otherwise.
1568 pci_find_next_extcap_method(device_t dev, device_t child, int capability,
1569 int start, int *capreg)
1571 struct pci_devinfo *dinfo = device_get_ivars(child);
1572 pcicfgregs *cfg = &dinfo->cfg;
1576 /* Only supported for PCI-express devices. */
1577 if (cfg->pcie.pcie_location == 0)
1580 ecap = pci_read_config(child, start, 4);
1581 KASSERT(PCI_EXTCAP_ID(ecap) == capability,
1582 ("start extended capability is not expected capability"));
1583 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1585 ecap = pci_read_config(child, ptr, 4);
1586 if (PCI_EXTCAP_ID(ecap) == capability) {
1591 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1598 * Support for MSI-X message interrupts.
1601 pci_write_msix_entry(device_t dev, u_int index, uint64_t address, uint32_t data)
1603 struct pci_devinfo *dinfo = device_get_ivars(dev);
1604 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1607 KASSERT(msix->msix_table_len > index, ("bogus index"));
1608 offset = msix->msix_table_offset + index * 16;
1609 bus_write_4(msix->msix_table_res, offset, address & 0xffffffff);
1610 bus_write_4(msix->msix_table_res, offset + 4, address >> 32);
1611 bus_write_4(msix->msix_table_res, offset + 8, data);
1615 pci_enable_msix_method(device_t dev, device_t child, u_int index,
1616 uint64_t address, uint32_t data)
1619 if (pci_msix_rewrite_table) {
1620 struct pci_devinfo *dinfo = device_get_ivars(child);
1621 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1624 * Some VM hosts require MSIX to be disabled in the
1625 * control register before updating the MSIX table
1626 * entries are allowed. It is not enough to only
1627 * disable MSIX while updating a single entry. MSIX
1628 * must be disabled while updating all entries in the
1631 pci_write_config(child,
1632 msix->msix_location + PCIR_MSIX_CTRL,
1633 msix->msix_ctrl & ~PCIM_MSIXCTRL_MSIX_ENABLE, 2);
1634 pci_resume_msix(child);
1636 pci_write_msix_entry(child, index, address, data);
1638 /* Enable MSI -> HT mapping. */
1639 pci_ht_map_msi(child, address);
1643 pci_mask_msix(device_t dev, u_int index)
1645 struct pci_devinfo *dinfo = device_get_ivars(dev);
1646 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1647 uint32_t offset, val;
1649 KASSERT(msix->msix_msgnum > index, ("bogus index"));
1650 offset = msix->msix_table_offset + index * 16 + 12;
1651 val = bus_read_4(msix->msix_table_res, offset);
1652 if (!(val & PCIM_MSIX_VCTRL_MASK)) {
1653 val |= PCIM_MSIX_VCTRL_MASK;
1654 bus_write_4(msix->msix_table_res, offset, val);
1659 pci_unmask_msix(device_t dev, u_int index)
1661 struct pci_devinfo *dinfo = device_get_ivars(dev);
1662 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1663 uint32_t offset, val;
1665 KASSERT(msix->msix_table_len > index, ("bogus index"));
1666 offset = msix->msix_table_offset + index * 16 + 12;
1667 val = bus_read_4(msix->msix_table_res, offset);
1668 if (val & PCIM_MSIX_VCTRL_MASK) {
1669 val &= ~PCIM_MSIX_VCTRL_MASK;
1670 bus_write_4(msix->msix_table_res, offset, val);
1675 pci_pending_msix(device_t dev, u_int index)
1677 struct pci_devinfo *dinfo = device_get_ivars(dev);
1678 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1679 uint32_t offset, bit;
1681 KASSERT(msix->msix_table_len > index, ("bogus index"));
1682 offset = msix->msix_pba_offset + (index / 32) * 4;
1683 bit = 1 << index % 32;
1684 return (bus_read_4(msix->msix_pba_res, offset) & bit);
1688 * Restore MSI-X registers and table during resume. If MSI-X is
1689 * enabled then walk the virtual table to restore the actual MSI-X
1693 pci_resume_msix(device_t dev)
1695 struct pci_devinfo *dinfo = device_get_ivars(dev);
1696 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1697 struct msix_table_entry *mte;
1698 struct msix_vector *mv;
1701 if (msix->msix_alloc > 0) {
1702 /* First, mask all vectors. */
1703 for (i = 0; i < msix->msix_msgnum; i++)
1704 pci_mask_msix(dev, i);
1706 /* Second, program any messages with at least one handler. */
1707 for (i = 0; i < msix->msix_table_len; i++) {
1708 mte = &msix->msix_table[i];
1709 if (mte->mte_vector == 0 || mte->mte_handlers == 0)
1711 mv = &msix->msix_vectors[mte->mte_vector - 1];
1712 pci_write_msix_entry(dev, i, mv->mv_address,
1714 pci_unmask_msix(dev, i);
1717 pci_write_config(dev, msix->msix_location + PCIR_MSIX_CTRL,
1718 msix->msix_ctrl, 2);
1722 * Attempt to allocate *count MSI-X messages. The actual number allocated is
1723 * returned in *count. After this function returns, each message will be
1724 * available to the driver as SYS_RES_IRQ resources starting at rid 1.
1727 pci_alloc_msix_method(device_t dev, device_t child, int *count)
1729 struct pci_devinfo *dinfo = device_get_ivars(child);
1730 pcicfgregs *cfg = &dinfo->cfg;
1731 struct resource_list_entry *rle;
1732 int actual, error, i, irq, max;
1734 /* Don't let count == 0 get us into trouble. */
1738 /* If rid 0 is allocated, then fail. */
1739 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
1740 if (rle != NULL && rle->res != NULL)
1743 /* Already have allocated messages? */
1744 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
1747 /* If MSI-X is blacklisted for this system, fail. */
1748 if (pci_msix_blacklisted())
1751 /* MSI-X capability present? */
1752 if (cfg->msix.msix_location == 0 || !pci_do_msix)
1755 /* Make sure the appropriate BARs are mapped. */
1756 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1757 cfg->msix.msix_table_bar);
1758 if (rle == NULL || rle->res == NULL ||
1759 !(rman_get_flags(rle->res) & RF_ACTIVE))
1761 cfg->msix.msix_table_res = rle->res;
1762 if (cfg->msix.msix_pba_bar != cfg->msix.msix_table_bar) {
1763 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1764 cfg->msix.msix_pba_bar);
1765 if (rle == NULL || rle->res == NULL ||
1766 !(rman_get_flags(rle->res) & RF_ACTIVE))
1769 cfg->msix.msix_pba_res = rle->res;
1772 device_printf(child,
1773 "attempting to allocate %d MSI-X vectors (%d supported)\n",
1774 *count, cfg->msix.msix_msgnum);
1775 max = min(*count, cfg->msix.msix_msgnum);
1776 for (i = 0; i < max; i++) {
1777 /* Allocate a message. */
1778 error = PCIB_ALLOC_MSIX(device_get_parent(dev), child, &irq);
1784 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
1790 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1);
1792 device_printf(child, "using IRQ %ju for MSI-X\n",
1798 * Be fancy and try to print contiguous runs of
1799 * IRQ values as ranges. 'irq' is the previous IRQ.
1800 * 'run' is true if we are in a range.
1802 device_printf(child, "using IRQs %ju", rle->start);
1805 for (i = 1; i < actual; i++) {
1806 rle = resource_list_find(&dinfo->resources,
1807 SYS_RES_IRQ, i + 1);
1809 /* Still in a run? */
1810 if (rle->start == irq + 1) {
1816 /* Finish previous range. */
1822 /* Start new range. */
1823 printf(",%ju", rle->start);
1827 /* Unfinished range? */
1830 printf(" for MSI-X\n");
1834 /* Mask all vectors. */
1835 for (i = 0; i < cfg->msix.msix_msgnum; i++)
1836 pci_mask_msix(child, i);
1838 /* Allocate and initialize vector data and virtual table. */
1839 cfg->msix.msix_vectors = malloc(sizeof(struct msix_vector) * actual,
1840 M_DEVBUF, M_WAITOK | M_ZERO);
1841 cfg->msix.msix_table = malloc(sizeof(struct msix_table_entry) * actual,
1842 M_DEVBUF, M_WAITOK | M_ZERO);
1843 for (i = 0; i < actual; i++) {
1844 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1845 cfg->msix.msix_vectors[i].mv_irq = rle->start;
1846 cfg->msix.msix_table[i].mte_vector = i + 1;
1849 /* Update control register to enable MSI-X. */
1850 cfg->msix.msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE;
1851 pci_write_config(child, cfg->msix.msix_location + PCIR_MSIX_CTRL,
1852 cfg->msix.msix_ctrl, 2);
1854 /* Update counts of alloc'd messages. */
1855 cfg->msix.msix_alloc = actual;
1856 cfg->msix.msix_table_len = actual;
1862 * By default, pci_alloc_msix() will assign the allocated IRQ
1863 * resources consecutively to the first N messages in the MSI-X table.
1864 * However, device drivers may want to use different layouts if they
1865 * either receive fewer messages than they asked for, or they wish to
1866 * populate the MSI-X table sparsely. This method allows the driver
1867 * to specify what layout it wants. It must be called after a
1868 * successful pci_alloc_msix() but before any of the associated
1869 * SYS_RES_IRQ resources are allocated via bus_alloc_resource().
1871 * The 'vectors' array contains 'count' message vectors. The array
1872 * maps directly to the MSI-X table in that index 0 in the array
1873 * specifies the vector for the first message in the MSI-X table, etc.
1874 * The vector value in each array index can either be 0 to indicate
1875 * that no vector should be assigned to a message slot, or it can be a
1876 * number from 1 to N (where N is the count returned from a
1877 * succcessful call to pci_alloc_msix()) to indicate which message
1878 * vector (IRQ) to be used for the corresponding message.
1880 * On successful return, each message with a non-zero vector will have
1881 * an associated SYS_RES_IRQ whose rid is equal to the array index +
1882 * 1. Additionally, if any of the IRQs allocated via the previous
1883 * call to pci_alloc_msix() are not used in the mapping, those IRQs
1884 * will be freed back to the system automatically.
1886 * For example, suppose a driver has a MSI-X table with 6 messages and
1887 * asks for 6 messages, but pci_alloc_msix() only returns a count of
1888 * 3. Call the three vectors allocated by pci_alloc_msix() A, B, and
1889 * C. After the call to pci_alloc_msix(), the device will be setup to
1890 * have an MSI-X table of ABC--- (where - means no vector assigned).
1891 * If the driver then passes a vector array of { 1, 0, 1, 2, 0, 2 },
1892 * then the MSI-X table will look like A-AB-B, and the 'C' vector will
1893 * be freed back to the system. This device will also have valid
1894 * SYS_RES_IRQ rids of 1, 3, 4, and 6.
1896 * In any case, the SYS_RES_IRQ rid X will always map to the message
1897 * at MSI-X table index X - 1 and will only be valid if a vector is
1898 * assigned to that table entry.
1901 pci_remap_msix_method(device_t dev, device_t child, int count,
1902 const u_int *vectors)
1904 struct pci_devinfo *dinfo = device_get_ivars(child);
1905 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1906 struct resource_list_entry *rle;
1907 int i, irq, j, *used;
1910 * Have to have at least one message in the table but the
1911 * table can't be bigger than the actual MSI-X table in the
1914 if (count == 0 || count > msix->msix_msgnum)
1917 /* Sanity check the vectors. */
1918 for (i = 0; i < count; i++)
1919 if (vectors[i] > msix->msix_alloc)
1923 * Make sure there aren't any holes in the vectors to be used.
1924 * It's a big pain to support it, and it doesn't really make
1925 * sense anyway. Also, at least one vector must be used.
1927 used = malloc(sizeof(int) * msix->msix_alloc, M_DEVBUF, M_WAITOK |
1929 for (i = 0; i < count; i++)
1930 if (vectors[i] != 0)
1931 used[vectors[i] - 1] = 1;
1932 for (i = 0; i < msix->msix_alloc - 1; i++)
1933 if (used[i] == 0 && used[i + 1] == 1) {
1934 free(used, M_DEVBUF);
1938 free(used, M_DEVBUF);
1942 /* Make sure none of the resources are allocated. */
1943 for (i = 0; i < msix->msix_table_len; i++) {
1944 if (msix->msix_table[i].mte_vector == 0)
1946 if (msix->msix_table[i].mte_handlers > 0) {
1947 free(used, M_DEVBUF);
1950 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1951 KASSERT(rle != NULL, ("missing resource"));
1952 if (rle->res != NULL) {
1953 free(used, M_DEVBUF);
1958 /* Free the existing resource list entries. */
1959 for (i = 0; i < msix->msix_table_len; i++) {
1960 if (msix->msix_table[i].mte_vector == 0)
1962 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
1966 * Build the new virtual table keeping track of which vectors are
1969 free(msix->msix_table, M_DEVBUF);
1970 msix->msix_table = malloc(sizeof(struct msix_table_entry) * count,
1971 M_DEVBUF, M_WAITOK | M_ZERO);
1972 for (i = 0; i < count; i++)
1973 msix->msix_table[i].mte_vector = vectors[i];
1974 msix->msix_table_len = count;
1976 /* Free any unused IRQs and resize the vectors array if necessary. */
1977 j = msix->msix_alloc - 1;
1979 struct msix_vector *vec;
1981 while (used[j] == 0) {
1982 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
1983 msix->msix_vectors[j].mv_irq);
1986 vec = malloc(sizeof(struct msix_vector) * (j + 1), M_DEVBUF,
1988 bcopy(msix->msix_vectors, vec, sizeof(struct msix_vector) *
1990 free(msix->msix_vectors, M_DEVBUF);
1991 msix->msix_vectors = vec;
1992 msix->msix_alloc = j + 1;
1994 free(used, M_DEVBUF);
1996 /* Map the IRQs onto the rids. */
1997 for (i = 0; i < count; i++) {
1998 if (vectors[i] == 0)
2000 irq = msix->msix_vectors[vectors[i] - 1].mv_irq;
2001 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
2006 device_printf(child, "Remapped MSI-X IRQs as: ");
2007 for (i = 0; i < count; i++) {
2010 if (vectors[i] == 0)
2014 msix->msix_vectors[vectors[i] - 1].mv_irq);
2023 pci_release_msix(device_t dev, device_t child)
2025 struct pci_devinfo *dinfo = device_get_ivars(child);
2026 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2027 struct resource_list_entry *rle;
2030 /* Do we have any messages to release? */
2031 if (msix->msix_alloc == 0)
2034 /* Make sure none of the resources are allocated. */
2035 for (i = 0; i < msix->msix_table_len; i++) {
2036 if (msix->msix_table[i].mte_vector == 0)
2038 if (msix->msix_table[i].mte_handlers > 0)
2040 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2041 KASSERT(rle != NULL, ("missing resource"));
2042 if (rle->res != NULL)
2046 /* Update control register to disable MSI-X. */
2047 msix->msix_ctrl &= ~PCIM_MSIXCTRL_MSIX_ENABLE;
2048 pci_write_config(child, msix->msix_location + PCIR_MSIX_CTRL,
2049 msix->msix_ctrl, 2);
2051 /* Free the resource list entries. */
2052 for (i = 0; i < msix->msix_table_len; i++) {
2053 if (msix->msix_table[i].mte_vector == 0)
2055 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2057 free(msix->msix_table, M_DEVBUF);
2058 msix->msix_table_len = 0;
2060 /* Release the IRQs. */
2061 for (i = 0; i < msix->msix_alloc; i++)
2062 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2063 msix->msix_vectors[i].mv_irq);
2064 free(msix->msix_vectors, M_DEVBUF);
2065 msix->msix_alloc = 0;
2070 * Return the max supported MSI-X messages this device supports.
2071 * Basically, assuming the MD code can alloc messages, this function
2072 * should return the maximum value that pci_alloc_msix() can return.
2073 * Thus, it is subject to the tunables, etc.
2076 pci_msix_count_method(device_t dev, device_t child)
2078 struct pci_devinfo *dinfo = device_get_ivars(child);
2079 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2081 if (pci_do_msix && msix->msix_location != 0)
2082 return (msix->msix_msgnum);
2087 pci_msix_pba_bar_method(device_t dev, device_t child)
2089 struct pci_devinfo *dinfo = device_get_ivars(child);
2090 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2092 if (pci_do_msix && msix->msix_location != 0)
2093 return (msix->msix_pba_bar);
2098 pci_msix_table_bar_method(device_t dev, device_t child)
2100 struct pci_devinfo *dinfo = device_get_ivars(child);
2101 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2103 if (pci_do_msix && msix->msix_location != 0)
2104 return (msix->msix_table_bar);
2109 * HyperTransport MSI mapping control
2112 pci_ht_map_msi(device_t dev, uint64_t addr)
2114 struct pci_devinfo *dinfo = device_get_ivars(dev);
2115 struct pcicfg_ht *ht = &dinfo->cfg.ht;
2120 if (addr && !(ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) &&
2121 ht->ht_msiaddr >> 20 == addr >> 20) {
2122 /* Enable MSI -> HT mapping. */
2123 ht->ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
2124 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2128 if (!addr && ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) {
2129 /* Disable MSI -> HT mapping. */
2130 ht->ht_msictrl &= ~PCIM_HTCMD_MSI_ENABLE;
2131 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2137 pci_get_max_payload(device_t dev)
2139 struct pci_devinfo *dinfo = device_get_ivars(dev);
2143 cap = dinfo->cfg.pcie.pcie_location;
2146 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2147 val &= PCIEM_CTL_MAX_PAYLOAD;
2149 return (1 << (val + 7));
2153 pci_get_max_read_req(device_t dev)
2155 struct pci_devinfo *dinfo = device_get_ivars(dev);
2159 cap = dinfo->cfg.pcie.pcie_location;
2162 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2163 val &= PCIEM_CTL_MAX_READ_REQUEST;
2165 return (1 << (val + 7));
2169 pci_set_max_read_req(device_t dev, int size)
2171 struct pci_devinfo *dinfo = device_get_ivars(dev);
2175 cap = dinfo->cfg.pcie.pcie_location;
2182 size = (1 << (fls(size) - 1));
2183 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2184 val &= ~PCIEM_CTL_MAX_READ_REQUEST;
2185 val |= (fls(size) - 8) << 12;
2186 pci_write_config(dev, cap + PCIER_DEVICE_CTL, val, 2);
2191 pcie_read_config(device_t dev, int reg, int width)
2193 struct pci_devinfo *dinfo = device_get_ivars(dev);
2196 cap = dinfo->cfg.pcie.pcie_location;
2200 return (0xffffffff);
2203 return (pci_read_config(dev, cap + reg, width));
2207 pcie_write_config(device_t dev, int reg, uint32_t value, int width)
2209 struct pci_devinfo *dinfo = device_get_ivars(dev);
2212 cap = dinfo->cfg.pcie.pcie_location;
2215 pci_write_config(dev, cap + reg, value, width);
2219 * Adjusts a PCI-e capability register by clearing the bits in mask
2220 * and setting the bits in (value & mask). Bits not set in mask are
2223 * Returns the old value on success or all ones on failure.
2226 pcie_adjust_config(device_t dev, int reg, uint32_t mask, uint32_t value,
2229 struct pci_devinfo *dinfo = device_get_ivars(dev);
2233 cap = dinfo->cfg.pcie.pcie_location;
2237 return (0xffffffff);
2240 old = pci_read_config(dev, cap + reg, width);
2242 new |= (value & mask);
2243 pci_write_config(dev, cap + reg, new, width);
2248 * Support for MSI message signalled interrupts.
2251 pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
2254 struct pci_devinfo *dinfo = device_get_ivars(child);
2255 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2257 /* Write data and address values. */
2258 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR,
2259 address & 0xffffffff, 4);
2260 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2261 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR_HIGH,
2263 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA_64BIT,
2266 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA, data,
2269 /* Enable MSI in the control register. */
2270 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
2271 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2274 /* Enable MSI -> HT mapping. */
2275 pci_ht_map_msi(child, address);
2279 pci_disable_msi_method(device_t dev, device_t child)
2281 struct pci_devinfo *dinfo = device_get_ivars(child);
2282 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2284 /* Disable MSI -> HT mapping. */
2285 pci_ht_map_msi(child, 0);
2287 /* Disable MSI in the control register. */
2288 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
2289 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2294 * Restore MSI registers during resume. If MSI is enabled then
2295 * restore the data and address registers in addition to the control
2299 pci_resume_msi(device_t dev)
2301 struct pci_devinfo *dinfo = device_get_ivars(dev);
2302 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2306 if (msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE) {
2307 address = msi->msi_addr;
2308 data = msi->msi_data;
2309 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR,
2310 address & 0xffffffff, 4);
2311 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2312 pci_write_config(dev, msi->msi_location +
2313 PCIR_MSI_ADDR_HIGH, address >> 32, 4);
2314 pci_write_config(dev, msi->msi_location +
2315 PCIR_MSI_DATA_64BIT, data, 2);
2317 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA,
2320 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl,
2325 pci_remap_intr_method(device_t bus, device_t dev, u_int irq)
2327 struct pci_devinfo *dinfo = device_get_ivars(dev);
2328 pcicfgregs *cfg = &dinfo->cfg;
2329 struct resource_list_entry *rle;
2330 struct msix_table_entry *mte;
2331 struct msix_vector *mv;
2337 * Handle MSI first. We try to find this IRQ among our list
2338 * of MSI IRQs. If we find it, we request updated address and
2339 * data registers and apply the results.
2341 if (cfg->msi.msi_alloc > 0) {
2343 /* If we don't have any active handlers, nothing to do. */
2344 if (cfg->msi.msi_handlers == 0)
2346 for (i = 0; i < cfg->msi.msi_alloc; i++) {
2347 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ,
2349 if (rle->start == irq) {
2350 error = PCIB_MAP_MSI(device_get_parent(bus),
2351 dev, irq, &addr, &data);
2354 pci_disable_msi(dev);
2355 dinfo->cfg.msi.msi_addr = addr;
2356 dinfo->cfg.msi.msi_data = data;
2357 pci_enable_msi(dev, addr, data);
2365 * For MSI-X, we check to see if we have this IRQ. If we do,
2366 * we request the updated mapping info. If that works, we go
2367 * through all the slots that use this IRQ and update them.
2369 if (cfg->msix.msix_alloc > 0) {
2370 for (i = 0; i < cfg->msix.msix_alloc; i++) {
2371 mv = &cfg->msix.msix_vectors[i];
2372 if (mv->mv_irq == irq) {
2373 error = PCIB_MAP_MSI(device_get_parent(bus),
2374 dev, irq, &addr, &data);
2377 mv->mv_address = addr;
2379 for (j = 0; j < cfg->msix.msix_table_len; j++) {
2380 mte = &cfg->msix.msix_table[j];
2381 if (mte->mte_vector != i + 1)
2383 if (mte->mte_handlers == 0)
2385 pci_mask_msix(dev, j);
2386 pci_enable_msix(dev, j, addr, data);
2387 pci_unmask_msix(dev, j);
2398 * Returns true if the specified device is blacklisted because MSI
2402 pci_msi_device_blacklisted(device_t dev)
2405 if (!pci_honor_msi_blacklist)
2408 return (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSI));
2412 * Determine if MSI is blacklisted globally on this system. Currently,
2413 * we just check for blacklisted chipsets as represented by the
2414 * host-PCI bridge at device 0:0:0. In the future, it may become
2415 * necessary to check other system attributes, such as the kenv values
2416 * that give the motherboard manufacturer and model number.
2419 pci_msi_blacklisted(void)
2423 if (!pci_honor_msi_blacklist)
2426 /* Blacklist all non-PCI-express and non-PCI-X chipsets. */
2427 if (!(pcie_chipset || pcix_chipset)) {
2428 if (vm_guest != VM_GUEST_NO) {
2430 * Whitelist older chipsets in virtual
2431 * machines known to support MSI.
2433 dev = pci_find_bsf(0, 0, 0);
2435 return (!pci_has_quirk(pci_get_devid(dev),
2436 PCI_QUIRK_ENABLE_MSI_VM));
2441 dev = pci_find_bsf(0, 0, 0);
2443 return (pci_msi_device_blacklisted(dev));
2448 * Returns true if the specified device is blacklisted because MSI-X
2449 * doesn't work. Note that this assumes that if MSI doesn't work,
2450 * MSI-X doesn't either.
2453 pci_msix_device_blacklisted(device_t dev)
2456 if (!pci_honor_msi_blacklist)
2459 if (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSIX))
2462 return (pci_msi_device_blacklisted(dev));
2466 * Determine if MSI-X is blacklisted globally on this system. If MSI
2467 * is blacklisted, assume that MSI-X is as well. Check for additional
2468 * chipsets where MSI works but MSI-X does not.
2471 pci_msix_blacklisted(void)
2475 if (!pci_honor_msi_blacklist)
2478 dev = pci_find_bsf(0, 0, 0);
2479 if (dev != NULL && pci_has_quirk(pci_get_devid(dev),
2480 PCI_QUIRK_DISABLE_MSIX))
2483 return (pci_msi_blacklisted());
2487 * Attempt to allocate *count MSI messages. The actual number allocated is
2488 * returned in *count. After this function returns, each message will be
2489 * available to the driver as SYS_RES_IRQ resources starting at a rid 1.
2492 pci_alloc_msi_method(device_t dev, device_t child, int *count)
2494 struct pci_devinfo *dinfo = device_get_ivars(child);
2495 pcicfgregs *cfg = &dinfo->cfg;
2496 struct resource_list_entry *rle;
2497 int actual, error, i, irqs[32];
2500 /* Don't let count == 0 get us into trouble. */
2504 /* If rid 0 is allocated, then fail. */
2505 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
2506 if (rle != NULL && rle->res != NULL)
2509 /* Already have allocated messages? */
2510 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
2513 /* If MSI is blacklisted for this system, fail. */
2514 if (pci_msi_blacklisted())
2517 /* MSI capability present? */
2518 if (cfg->msi.msi_location == 0 || !pci_do_msi)
2522 device_printf(child,
2523 "attempting to allocate %d MSI vectors (%d supported)\n",
2524 *count, cfg->msi.msi_msgnum);
2526 /* Don't ask for more than the device supports. */
2527 actual = min(*count, cfg->msi.msi_msgnum);
2529 /* Don't ask for more than 32 messages. */
2530 actual = min(actual, 32);
2532 /* MSI requires power of 2 number of messages. */
2533 if (!powerof2(actual))
2537 /* Try to allocate N messages. */
2538 error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual,
2550 * We now have N actual messages mapped onto SYS_RES_IRQ
2551 * resources in the irqs[] array, so add new resources
2552 * starting at rid 1.
2554 for (i = 0; i < actual; i++)
2555 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1,
2556 irqs[i], irqs[i], 1);
2560 device_printf(child, "using IRQ %d for MSI\n", irqs[0]);
2565 * Be fancy and try to print contiguous runs
2566 * of IRQ values as ranges. 'run' is true if
2567 * we are in a range.
2569 device_printf(child, "using IRQs %d", irqs[0]);
2571 for (i = 1; i < actual; i++) {
2573 /* Still in a run? */
2574 if (irqs[i] == irqs[i - 1] + 1) {
2579 /* Finish previous range. */
2581 printf("-%d", irqs[i - 1]);
2585 /* Start new range. */
2586 printf(",%d", irqs[i]);
2589 /* Unfinished range? */
2591 printf("-%d", irqs[actual - 1]);
2592 printf(" for MSI\n");
2596 /* Update control register with actual count. */
2597 ctrl = cfg->msi.msi_ctrl;
2598 ctrl &= ~PCIM_MSICTRL_MME_MASK;
2599 ctrl |= (ffs(actual) - 1) << 4;
2600 cfg->msi.msi_ctrl = ctrl;
2601 pci_write_config(child, cfg->msi.msi_location + PCIR_MSI_CTRL, ctrl, 2);
2603 /* Update counts of alloc'd messages. */
2604 cfg->msi.msi_alloc = actual;
2605 cfg->msi.msi_handlers = 0;
2610 /* Release the MSI messages associated with this device. */
2612 pci_release_msi_method(device_t dev, device_t child)
2614 struct pci_devinfo *dinfo = device_get_ivars(child);
2615 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2616 struct resource_list_entry *rle;
2617 int error, i, irqs[32];
2619 /* Try MSI-X first. */
2620 error = pci_release_msix(dev, child);
2621 if (error != ENODEV)
2624 /* Do we have any messages to release? */
2625 if (msi->msi_alloc == 0)
2627 KASSERT(msi->msi_alloc <= 32, ("more than 32 alloc'd messages"));
2629 /* Make sure none of the resources are allocated. */
2630 if (msi->msi_handlers > 0)
2632 for (i = 0; i < msi->msi_alloc; i++) {
2633 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2634 KASSERT(rle != NULL, ("missing MSI resource"));
2635 if (rle->res != NULL)
2637 irqs[i] = rle->start;
2640 /* Update control register with 0 count. */
2641 KASSERT(!(msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE),
2642 ("%s: MSI still enabled", __func__));
2643 msi->msi_ctrl &= ~PCIM_MSICTRL_MME_MASK;
2644 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2647 /* Release the messages. */
2648 PCIB_RELEASE_MSI(device_get_parent(dev), child, msi->msi_alloc, irqs);
2649 for (i = 0; i < msi->msi_alloc; i++)
2650 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2652 /* Update alloc count. */
2660 * Return the max supported MSI messages this device supports.
2661 * Basically, assuming the MD code can alloc messages, this function
2662 * should return the maximum value that pci_alloc_msi() can return.
2663 * Thus, it is subject to the tunables, etc.
2666 pci_msi_count_method(device_t dev, device_t child)
2668 struct pci_devinfo *dinfo = device_get_ivars(child);
2669 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2671 if (pci_do_msi && msi->msi_location != 0)
2672 return (msi->msi_msgnum);
2676 /* free pcicfgregs structure and all depending data structures */
2679 pci_freecfg(struct pci_devinfo *dinfo)
2681 struct devlist *devlist_head;
2682 struct pci_map *pm, *next;
2685 devlist_head = &pci_devq;
2687 if (dinfo->cfg.vpd.vpd_reg) {
2688 free(dinfo->cfg.vpd.vpd_ident, M_DEVBUF);
2689 for (i = 0; i < dinfo->cfg.vpd.vpd_rocnt; i++)
2690 free(dinfo->cfg.vpd.vpd_ros[i].value, M_DEVBUF);
2691 free(dinfo->cfg.vpd.vpd_ros, M_DEVBUF);
2692 for (i = 0; i < dinfo->cfg.vpd.vpd_wcnt; i++)
2693 free(dinfo->cfg.vpd.vpd_w[i].value, M_DEVBUF);
2694 free(dinfo->cfg.vpd.vpd_w, M_DEVBUF);
2696 STAILQ_FOREACH_SAFE(pm, &dinfo->cfg.maps, pm_link, next) {
2699 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links);
2700 free(dinfo, M_DEVBUF);
2702 /* increment the generation count */
2705 /* we're losing one device */
2711 * PCI power manangement
2714 pci_set_powerstate_method(device_t dev, device_t child, int state)
2716 struct pci_devinfo *dinfo = device_get_ivars(child);
2717 pcicfgregs *cfg = &dinfo->cfg;
2719 int oldstate, highest, delay;
2721 if (cfg->pp.pp_cap == 0)
2722 return (EOPNOTSUPP);
2725 * Optimize a no state change request away. While it would be OK to
2726 * write to the hardware in theory, some devices have shown odd
2727 * behavior when going from D3 -> D3.
2729 oldstate = pci_get_powerstate(child);
2730 if (oldstate == state)
2734 * The PCI power management specification states that after a state
2735 * transition between PCI power states, system software must
2736 * guarantee a minimal delay before the function accesses the device.
2737 * Compute the worst case delay that we need to guarantee before we
2738 * access the device. Many devices will be responsive much more
2739 * quickly than this delay, but there are some that don't respond
2740 * instantly to state changes. Transitions to/from D3 state require
2741 * 10ms, while D2 requires 200us, and D0/1 require none. The delay
2742 * is done below with DELAY rather than a sleeper function because
2743 * this function can be called from contexts where we cannot sleep.
2745 highest = (oldstate > state) ? oldstate : state;
2746 if (highest == PCI_POWERSTATE_D3)
2748 else if (highest == PCI_POWERSTATE_D2)
2752 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2)
2753 & ~PCIM_PSTAT_DMASK;
2755 case PCI_POWERSTATE_D0:
2756 status |= PCIM_PSTAT_D0;
2758 case PCI_POWERSTATE_D1:
2759 if ((cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) == 0)
2760 return (EOPNOTSUPP);
2761 status |= PCIM_PSTAT_D1;
2763 case PCI_POWERSTATE_D2:
2764 if ((cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) == 0)
2765 return (EOPNOTSUPP);
2766 status |= PCIM_PSTAT_D2;
2768 case PCI_POWERSTATE_D3:
2769 status |= PCIM_PSTAT_D3;
2776 pci_printf(cfg, "Transition from D%d to D%d\n", oldstate,
2779 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 2);
2786 pci_get_powerstate_method(device_t dev, device_t child)
2788 struct pci_devinfo *dinfo = device_get_ivars(child);
2789 pcicfgregs *cfg = &dinfo->cfg;
2793 if (cfg->pp.pp_cap != 0) {
2794 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2);
2795 switch (status & PCIM_PSTAT_DMASK) {
2797 result = PCI_POWERSTATE_D0;
2800 result = PCI_POWERSTATE_D1;
2803 result = PCI_POWERSTATE_D2;
2806 result = PCI_POWERSTATE_D3;
2809 result = PCI_POWERSTATE_UNKNOWN;
2813 /* No support, device is always at D0 */
2814 result = PCI_POWERSTATE_D0;
2820 * Some convenience functions for PCI device drivers.
2823 static __inline void
2824 pci_set_command_bit(device_t dev, device_t child, uint16_t bit)
2828 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2830 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2833 static __inline void
2834 pci_clear_command_bit(device_t dev, device_t child, uint16_t bit)
2838 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2840 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2844 pci_enable_busmaster_method(device_t dev, device_t child)
2846 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2851 pci_disable_busmaster_method(device_t dev, device_t child)
2853 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2858 pci_enable_io_method(device_t dev, device_t child, int space)
2863 case SYS_RES_IOPORT:
2864 bit = PCIM_CMD_PORTEN;
2866 case SYS_RES_MEMORY:
2867 bit = PCIM_CMD_MEMEN;
2872 pci_set_command_bit(dev, child, bit);
2877 pci_disable_io_method(device_t dev, device_t child, int space)
2882 case SYS_RES_IOPORT:
2883 bit = PCIM_CMD_PORTEN;
2885 case SYS_RES_MEMORY:
2886 bit = PCIM_CMD_MEMEN;
2891 pci_clear_command_bit(dev, child, bit);
2896 * New style pci driver. Parent device is either a pci-host-bridge or a
2897 * pci-pci-bridge. Both kinds are represented by instances of pcib.
2901 pci_print_verbose(struct pci_devinfo *dinfo)
2905 pcicfgregs *cfg = &dinfo->cfg;
2907 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n",
2908 cfg->vendor, cfg->device, cfg->revid);
2909 printf("\tdomain=%d, bus=%d, slot=%d, func=%d\n",
2910 cfg->domain, cfg->bus, cfg->slot, cfg->func);
2911 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n",
2912 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype,
2914 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n",
2915 cfg->cmdreg, cfg->statreg, cfg->cachelnsz);
2916 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n",
2917 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt,
2918 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250);
2919 if (cfg->intpin > 0)
2920 printf("\tintpin=%c, irq=%d\n",
2921 cfg->intpin +'a' -1, cfg->intline);
2922 if (cfg->pp.pp_cap) {
2925 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2);
2926 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n",
2927 cfg->pp.pp_cap & PCIM_PCAP_SPEC,
2928 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "",
2929 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "",
2930 status & PCIM_PSTAT_DMASK);
2932 if (cfg->msi.msi_location) {
2935 ctrl = cfg->msi.msi_ctrl;
2936 printf("\tMSI supports %d message%s%s%s\n",
2937 cfg->msi.msi_msgnum,
2938 (cfg->msi.msi_msgnum == 1) ? "" : "s",
2939 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "",
2940 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":"");
2942 if (cfg->msix.msix_location) {
2943 printf("\tMSI-X supports %d message%s ",
2944 cfg->msix.msix_msgnum,
2945 (cfg->msix.msix_msgnum == 1) ? "" : "s");
2946 if (cfg->msix.msix_table_bar == cfg->msix.msix_pba_bar)
2947 printf("in map 0x%x\n",
2948 cfg->msix.msix_table_bar);
2950 printf("in maps 0x%x and 0x%x\n",
2951 cfg->msix.msix_table_bar,
2952 cfg->msix.msix_pba_bar);
2958 pci_porten(device_t dev)
2960 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_PORTEN) != 0;
2964 pci_memen(device_t dev)
2966 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_MEMEN) != 0;
2970 pci_read_bar(device_t dev, int reg, pci_addr_t *mapp, pci_addr_t *testvalp,
2973 struct pci_devinfo *dinfo;
2974 pci_addr_t map, testval;
2979 * The device ROM BAR is special. It is always a 32-bit
2980 * memory BAR. Bit 0 is special and should not be set when
2983 dinfo = device_get_ivars(dev);
2984 if (PCIR_IS_BIOS(&dinfo->cfg, reg)) {
2985 map = pci_read_config(dev, reg, 4);
2986 pci_write_config(dev, reg, 0xfffffffe, 4);
2987 testval = pci_read_config(dev, reg, 4);
2988 pci_write_config(dev, reg, map, 4);
2990 *testvalp = testval;
2996 map = pci_read_config(dev, reg, 4);
2997 ln2range = pci_maprange(map);
2999 map |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3002 * Disable decoding via the command register before
3003 * determining the BAR's length since we will be placing it in
3006 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3007 pci_write_config(dev, PCIR_COMMAND,
3008 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
3011 * Determine the BAR's length by writing all 1's. The bottom
3012 * log_2(size) bits of the BAR will stick as 0 when we read
3015 * NB: according to the PCI Local Bus Specification, rev. 3.0:
3016 * "Software writes 0FFFFFFFFh to both registers, reads them back,
3017 * and combines the result into a 64-bit value." (section 6.2.5.1)
3019 * Writes to both registers must be performed before attempting to
3020 * read back the size value.
3023 pci_write_config(dev, reg, 0xffffffff, 4);
3024 if (ln2range == 64) {
3025 pci_write_config(dev, reg + 4, 0xffffffff, 4);
3026 testval |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3028 testval |= pci_read_config(dev, reg, 4);
3031 * Restore the original value of the BAR. We may have reprogrammed
3032 * the BAR of the low-level console device and when booting verbose,
3033 * we need the console device addressable.
3035 pci_write_config(dev, reg, map, 4);
3037 pci_write_config(dev, reg + 4, map >> 32, 4);
3038 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3041 *testvalp = testval;
3043 *bar64 = (ln2range == 64);
3047 pci_write_bar(device_t dev, struct pci_map *pm, pci_addr_t base)
3049 struct pci_devinfo *dinfo;
3052 /* The device ROM BAR is always a 32-bit memory BAR. */
3053 dinfo = device_get_ivars(dev);
3054 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3057 ln2range = pci_maprange(pm->pm_value);
3058 pci_write_config(dev, pm->pm_reg, base, 4);
3060 pci_write_config(dev, pm->pm_reg + 4, base >> 32, 4);
3061 pm->pm_value = pci_read_config(dev, pm->pm_reg, 4);
3063 pm->pm_value |= (pci_addr_t)pci_read_config(dev,
3064 pm->pm_reg + 4, 4) << 32;
3068 pci_find_bar(device_t dev, int reg)
3070 struct pci_devinfo *dinfo;
3073 dinfo = device_get_ivars(dev);
3074 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3075 if (pm->pm_reg == reg)
3082 pci_bar_enabled(device_t dev, struct pci_map *pm)
3084 struct pci_devinfo *dinfo;
3087 dinfo = device_get_ivars(dev);
3088 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) &&
3089 !(pm->pm_value & PCIM_BIOS_ENABLE))
3091 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3092 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) || PCI_BAR_MEM(pm->pm_value))
3093 return ((cmd & PCIM_CMD_MEMEN) != 0);
3095 return ((cmd & PCIM_CMD_PORTEN) != 0);
3099 pci_add_bar(device_t dev, int reg, pci_addr_t value, pci_addr_t size)
3101 struct pci_devinfo *dinfo;
3102 struct pci_map *pm, *prev;
3104 dinfo = device_get_ivars(dev);
3105 pm = malloc(sizeof(*pm), M_DEVBUF, M_WAITOK | M_ZERO);
3107 pm->pm_value = value;
3109 STAILQ_FOREACH(prev, &dinfo->cfg.maps, pm_link) {
3110 KASSERT(prev->pm_reg != pm->pm_reg, ("duplicate map %02x",
3112 if (STAILQ_NEXT(prev, pm_link) == NULL ||
3113 STAILQ_NEXT(prev, pm_link)->pm_reg > pm->pm_reg)
3117 STAILQ_INSERT_AFTER(&dinfo->cfg.maps, prev, pm, pm_link);
3119 STAILQ_INSERT_TAIL(&dinfo->cfg.maps, pm, pm_link);
3124 pci_restore_bars(device_t dev)
3126 struct pci_devinfo *dinfo;
3130 dinfo = device_get_ivars(dev);
3131 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3132 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3135 ln2range = pci_maprange(pm->pm_value);
3136 pci_write_config(dev, pm->pm_reg, pm->pm_value, 4);
3138 pci_write_config(dev, pm->pm_reg + 4,
3139 pm->pm_value >> 32, 4);
3144 * Add a resource based on a pci map register. Return 1 if the map
3145 * register is a 32bit map register or 2 if it is a 64bit register.
3148 pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl,
3149 int force, int prefetch)
3152 pci_addr_t base, map, testval;
3153 pci_addr_t start, end, count;
3154 int barlen, basezero, flags, maprange, mapsize, type;
3156 struct resource *res;
3159 * The BAR may already exist if the device is a CardBus card
3160 * whose CIS is stored in this BAR.
3162 pm = pci_find_bar(dev, reg);
3164 maprange = pci_maprange(pm->pm_value);
3165 barlen = maprange == 64 ? 2 : 1;
3169 pci_read_bar(dev, reg, &map, &testval, NULL);
3170 if (PCI_BAR_MEM(map)) {
3171 type = SYS_RES_MEMORY;
3172 if (map & PCIM_BAR_MEM_PREFETCH)
3175 type = SYS_RES_IOPORT;
3176 mapsize = pci_mapsize(testval);
3177 base = pci_mapbase(map);
3178 #ifdef __PCI_BAR_ZERO_VALID
3181 basezero = base == 0;
3183 maprange = pci_maprange(map);
3184 barlen = maprange == 64 ? 2 : 1;
3187 * For I/O registers, if bottom bit is set, and the next bit up
3188 * isn't clear, we know we have a BAR that doesn't conform to the
3189 * spec, so ignore it. Also, sanity check the size of the data
3190 * areas to the type of memory involved. Memory must be at least
3191 * 16 bytes in size, while I/O ranges must be at least 4.
3193 if (PCI_BAR_IO(testval) && (testval & PCIM_BAR_IO_RESERVED) != 0)
3195 if ((type == SYS_RES_MEMORY && mapsize < 4) ||
3196 (type == SYS_RES_IOPORT && mapsize < 2))
3199 /* Save a record of this BAR. */
3200 pm = pci_add_bar(dev, reg, map, mapsize);
3202 printf("\tmap[%02x]: type %s, range %2d, base %#jx, size %2d",
3203 reg, pci_maptype(map), maprange, (uintmax_t)base, mapsize);
3204 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3205 printf(", port disabled\n");
3206 else if (type == SYS_RES_MEMORY && !pci_memen(dev))
3207 printf(", memory disabled\n");
3209 printf(", enabled\n");
3213 * If base is 0, then we have problems if this architecture does
3214 * not allow that. It is best to ignore such entries for the
3215 * moment. These will be allocated later if the driver specifically
3216 * requests them. However, some removable buses look better when
3217 * all resources are allocated, so allow '0' to be overriden.
3219 * Similarly treat maps whose values is the same as the test value
3220 * read back. These maps have had all f's written to them by the
3221 * BIOS in an attempt to disable the resources.
3223 if (!force && (basezero || map == testval))
3225 if ((u_long)base != base) {
3227 "pci%d:%d:%d:%d bar %#x too many address bits",
3228 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev),
3229 pci_get_function(dev), reg);
3234 * This code theoretically does the right thing, but has
3235 * undesirable side effects in some cases where peripherals
3236 * respond oddly to having these bits enabled. Let the user
3237 * be able to turn them off (since pci_enable_io_modes is 1 by
3240 if (pci_enable_io_modes) {
3241 /* Turn on resources that have been left off by a lazy BIOS */
3242 if (type == SYS_RES_IOPORT && !pci_porten(dev)) {
3243 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3244 cmd |= PCIM_CMD_PORTEN;
3245 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3247 if (type == SYS_RES_MEMORY && !pci_memen(dev)) {
3248 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3249 cmd |= PCIM_CMD_MEMEN;
3250 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3253 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3255 if (type == SYS_RES_MEMORY && !pci_memen(dev))
3259 count = (pci_addr_t)1 << mapsize;
3260 flags = RF_ALIGNMENT_LOG2(mapsize);
3262 flags |= RF_PREFETCHABLE;
3263 if (basezero || base == pci_mapbase(testval) || pci_clear_bars) {
3264 start = 0; /* Let the parent decide. */
3268 end = base + count - 1;
3270 resource_list_add(rl, type, reg, start, end, count);
3273 * Try to allocate the resource for this BAR from our parent
3274 * so that this resource range is already reserved. The
3275 * driver for this device will later inherit this resource in
3276 * pci_alloc_resource().
3278 res = resource_list_reserve(rl, bus, dev, type, ®, start, end, count,
3280 if (pci_do_realloc_bars && res == NULL && (start != 0 || end != ~0)) {
3282 * If the allocation fails, try to allocate a resource for
3283 * this BAR using any available range. The firmware felt
3284 * it was important enough to assign a resource, so don't
3285 * disable decoding if we can help it.
3287 resource_list_delete(rl, type, reg);
3288 resource_list_add(rl, type, reg, 0, ~0, count);
3289 res = resource_list_reserve(rl, bus, dev, type, ®, 0, ~0,
3294 * If the allocation fails, delete the resource list entry
3295 * and disable decoding for this device.
3297 * If the driver requests this resource in the future,
3298 * pci_reserve_map() will try to allocate a fresh
3301 resource_list_delete(rl, type, reg);
3302 pci_disable_io(dev, type);
3305 "pci%d:%d:%d:%d bar %#x failed to allocate\n",
3306 pci_get_domain(dev), pci_get_bus(dev),
3307 pci_get_slot(dev), pci_get_function(dev), reg);
3309 start = rman_get_start(res);
3310 pci_write_bar(dev, pm, start);
3316 * For ATA devices we need to decide early what addressing mode to use.
3317 * Legacy demands that the primary and secondary ATA ports sits on the
3318 * same addresses that old ISA hardware did. This dictates that we use
3319 * those addresses and ignore the BAR's if we cannot set PCI native
3323 pci_ata_maps(device_t bus, device_t dev, struct resource_list *rl, int force,
3324 uint32_t prefetchmask)
3326 int rid, type, progif;
3328 /* if this device supports PCI native addressing use it */
3329 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3330 if ((progif & 0x8a) == 0x8a) {
3331 if (pci_mapbase(pci_read_config(dev, PCIR_BAR(0), 4)) &&
3332 pci_mapbase(pci_read_config(dev, PCIR_BAR(2), 4))) {
3333 printf("Trying ATA native PCI addressing mode\n");
3334 pci_write_config(dev, PCIR_PROGIF, progif | 0x05, 1);
3338 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3339 type = SYS_RES_IOPORT;
3340 if (progif & PCIP_STORAGE_IDE_MODEPRIM) {
3341 pci_add_map(bus, dev, PCIR_BAR(0), rl, force,
3342 prefetchmask & (1 << 0));
3343 pci_add_map(bus, dev, PCIR_BAR(1), rl, force,
3344 prefetchmask & (1 << 1));
3347 resource_list_add(rl, type, rid, 0x1f0, 0x1f7, 8);
3348 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x1f0,
3351 resource_list_add(rl, type, rid, 0x3f6, 0x3f6, 1);
3352 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x3f6,
3355 if (progif & PCIP_STORAGE_IDE_MODESEC) {
3356 pci_add_map(bus, dev, PCIR_BAR(2), rl, force,
3357 prefetchmask & (1 << 2));
3358 pci_add_map(bus, dev, PCIR_BAR(3), rl, force,
3359 prefetchmask & (1 << 3));
3362 resource_list_add(rl, type, rid, 0x170, 0x177, 8);
3363 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x170,
3366 resource_list_add(rl, type, rid, 0x376, 0x376, 1);
3367 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x376,
3370 pci_add_map(bus, dev, PCIR_BAR(4), rl, force,
3371 prefetchmask & (1 << 4));
3372 pci_add_map(bus, dev, PCIR_BAR(5), rl, force,
3373 prefetchmask & (1 << 5));
3377 pci_assign_interrupt(device_t bus, device_t dev, int force_route)
3379 struct pci_devinfo *dinfo = device_get_ivars(dev);
3380 pcicfgregs *cfg = &dinfo->cfg;
3381 char tunable_name[64];
3384 /* Has to have an intpin to have an interrupt. */
3385 if (cfg->intpin == 0)
3388 /* Let the user override the IRQ with a tunable. */
3389 irq = PCI_INVALID_IRQ;
3390 snprintf(tunable_name, sizeof(tunable_name),
3391 "hw.pci%d.%d.%d.INT%c.irq",
3392 cfg->domain, cfg->bus, cfg->slot, cfg->intpin + 'A' - 1);
3393 if (TUNABLE_INT_FETCH(tunable_name, &irq) && (irq >= 255 || irq <= 0))
3394 irq = PCI_INVALID_IRQ;
3397 * If we didn't get an IRQ via the tunable, then we either use the
3398 * IRQ value in the intline register or we ask the bus to route an
3399 * interrupt for us. If force_route is true, then we only use the
3400 * value in the intline register if the bus was unable to assign an
3403 if (!PCI_INTERRUPT_VALID(irq)) {
3404 if (!PCI_INTERRUPT_VALID(cfg->intline) || force_route)
3405 irq = PCI_ASSIGN_INTERRUPT(bus, dev);
3406 if (!PCI_INTERRUPT_VALID(irq))
3410 /* If after all that we don't have an IRQ, just bail. */
3411 if (!PCI_INTERRUPT_VALID(irq))
3414 /* Update the config register if it changed. */
3415 if (irq != cfg->intline) {
3417 pci_write_config(dev, PCIR_INTLINE, irq, 1);
3420 /* Add this IRQ as rid 0 interrupt resource. */
3421 resource_list_add(&dinfo->resources, SYS_RES_IRQ, 0, irq, irq, 1);
3424 /* Perform early OHCI takeover from SMM. */
3426 ohci_early_takeover(device_t self)
3428 struct resource *res;
3434 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3438 ctl = bus_read_4(res, OHCI_CONTROL);
3439 if (ctl & OHCI_IR) {
3441 printf("ohci early: "
3442 "SMM active, request owner change\n");
3443 bus_write_4(res, OHCI_COMMAND_STATUS, OHCI_OCR);
3444 for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) {
3446 ctl = bus_read_4(res, OHCI_CONTROL);
3448 if (ctl & OHCI_IR) {
3450 printf("ohci early: "
3451 "SMM does not respond, resetting\n");
3452 bus_write_4(res, OHCI_CONTROL, OHCI_HCFS_RESET);
3454 /* Disable interrupts */
3455 bus_write_4(res, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS);
3458 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3461 /* Perform early UHCI takeover from SMM. */
3463 uhci_early_takeover(device_t self)
3465 struct resource *res;
3469 * Set the PIRQD enable bit and switch off all the others. We don't
3470 * want legacy support to interfere with us XXX Does this also mean
3471 * that the BIOS won't touch the keyboard anymore if it is connected
3472 * to the ports of the root hub?
3474 pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2);
3476 /* Disable interrupts */
3477 rid = PCI_UHCI_BASE_REG;
3478 res = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE);
3480 bus_write_2(res, UHCI_INTR, 0);
3481 bus_release_resource(self, SYS_RES_IOPORT, rid, res);
3485 /* Perform early EHCI takeover from SMM. */
3487 ehci_early_takeover(device_t self)
3489 struct resource *res;
3499 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3503 cparams = bus_read_4(res, EHCI_HCCPARAMS);
3505 /* Synchronise with the BIOS if it owns the controller. */
3506 for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
3507 eecp = EHCI_EECP_NEXT(eec)) {
3508 eec = pci_read_config(self, eecp, 4);
3509 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
3512 bios_sem = pci_read_config(self, eecp +
3513 EHCI_LEGSUP_BIOS_SEM, 1);
3514 if (bios_sem == 0) {
3518 printf("ehci early: "
3519 "SMM active, request owner change\n");
3521 pci_write_config(self, eecp + EHCI_LEGSUP_OS_SEM, 1, 1);
3523 for (i = 0; (i < 100) && (bios_sem != 0); i++) {
3525 bios_sem = pci_read_config(self, eecp +
3526 EHCI_LEGSUP_BIOS_SEM, 1);
3529 if (bios_sem != 0) {
3531 printf("ehci early: "
3532 "SMM does not respond\n");
3534 /* Disable interrupts */
3535 offs = EHCI_CAPLENGTH(bus_read_4(res, EHCI_CAPLEN_HCIVERSION));
3536 bus_write_4(res, offs + EHCI_USBINTR, 0);
3538 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3541 /* Perform early XHCI takeover from SMM. */
3543 xhci_early_takeover(device_t self)
3545 struct resource *res;
3555 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3559 cparams = bus_read_4(res, XHCI_HCSPARAMS0);
3563 /* Synchronise with the BIOS if it owns the controller. */
3564 for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
3565 eecp += XHCI_XECP_NEXT(eec) << 2) {
3566 eec = bus_read_4(res, eecp);
3568 if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
3571 bios_sem = bus_read_1(res, eecp + XHCI_XECP_BIOS_SEM);
3576 printf("xhci early: "
3577 "SMM active, request owner change\n");
3579 bus_write_1(res, eecp + XHCI_XECP_OS_SEM, 1);
3581 /* wait a maximum of 5 second */
3583 for (i = 0; (i < 5000) && (bios_sem != 0); i++) {
3585 bios_sem = bus_read_1(res, eecp +
3586 XHCI_XECP_BIOS_SEM);
3589 if (bios_sem != 0) {
3591 printf("xhci early: "
3592 "SMM does not respond\n");
3595 /* Disable interrupts */
3596 offs = bus_read_1(res, XHCI_CAPLENGTH);
3597 bus_write_4(res, offs + XHCI_USBCMD, 0);
3598 bus_read_4(res, offs + XHCI_USBSTS);
3600 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3603 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
3605 pci_reserve_secbus(device_t bus, device_t dev, pcicfgregs *cfg,
3606 struct resource_list *rl)
3608 struct resource *res;
3610 rman_res_t start, end, count;
3611 int rid, sec_bus, sec_reg, sub_bus, sub_reg, sup_bus;
3613 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3614 case PCIM_HDRTYPE_BRIDGE:
3615 sec_reg = PCIR_SECBUS_1;
3616 sub_reg = PCIR_SUBBUS_1;
3618 case PCIM_HDRTYPE_CARDBUS:
3619 sec_reg = PCIR_SECBUS_2;
3620 sub_reg = PCIR_SUBBUS_2;
3627 * If the existing bus range is valid, attempt to reserve it
3628 * from our parent. If this fails for any reason, clear the
3629 * secbus and subbus registers.
3631 * XXX: Should we reset sub_bus to sec_bus if it is < sec_bus?
3632 * This would at least preserve the existing sec_bus if it is
3635 sec_bus = PCI_READ_CONFIG(bus, dev, sec_reg, 1);
3636 sub_bus = PCI_READ_CONFIG(bus, dev, sub_reg, 1);
3638 /* Quirk handling. */
3639 switch (pci_get_devid(dev)) {
3640 case 0x12258086: /* Intel 82454KX/GX (Orion) */
3641 sup_bus = pci_read_config(dev, 0x41, 1);
3642 if (sup_bus != 0xff) {
3643 sec_bus = sup_bus + 1;
3644 sub_bus = sup_bus + 1;
3645 PCI_WRITE_CONFIG(bus, dev, sec_reg, sec_bus, 1);
3646 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3651 /* Compaq R3000 BIOS sets wrong subordinate bus number. */
3652 if ((cp = kern_getenv("smbios.planar.maker")) == NULL)
3654 if (strncmp(cp, "Compal", 6) != 0) {
3659 if ((cp = kern_getenv("smbios.planar.product")) == NULL)
3661 if (strncmp(cp, "08A0", 4) != 0) {
3666 if (sub_bus < 0xa) {
3668 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3674 printf("\tsecbus=%d, subbus=%d\n", sec_bus, sub_bus);
3675 if (sec_bus > 0 && sub_bus >= sec_bus) {
3678 count = end - start + 1;
3680 resource_list_add(rl, PCI_RES_BUS, 0, 0, ~0, count);
3683 * If requested, clear secondary bus registers in
3684 * bridge devices to force a complete renumbering
3685 * rather than reserving the existing range. However,
3686 * preserve the existing size.
3688 if (pci_clear_buses)
3692 res = resource_list_reserve(rl, bus, dev, PCI_RES_BUS, &rid,
3693 start, end, count, 0);
3699 "pci%d:%d:%d:%d secbus failed to allocate\n",
3700 pci_get_domain(dev), pci_get_bus(dev),
3701 pci_get_slot(dev), pci_get_function(dev));
3705 PCI_WRITE_CONFIG(bus, dev, sec_reg, 0, 1);
3706 PCI_WRITE_CONFIG(bus, dev, sub_reg, 0, 1);
3709 static struct resource *
3710 pci_alloc_secbus(device_t dev, device_t child, int *rid, rman_res_t start,
3711 rman_res_t end, rman_res_t count, u_int flags)
3713 struct pci_devinfo *dinfo;
3715 struct resource_list *rl;
3716 struct resource *res;
3717 int sec_reg, sub_reg;
3719 dinfo = device_get_ivars(child);
3721 rl = &dinfo->resources;
3722 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3723 case PCIM_HDRTYPE_BRIDGE:
3724 sec_reg = PCIR_SECBUS_1;
3725 sub_reg = PCIR_SUBBUS_1;
3727 case PCIM_HDRTYPE_CARDBUS:
3728 sec_reg = PCIR_SECBUS_2;
3729 sub_reg = PCIR_SUBBUS_2;
3738 if (resource_list_find(rl, PCI_RES_BUS, *rid) == NULL)
3739 resource_list_add(rl, PCI_RES_BUS, *rid, start, end, count);
3740 if (!resource_list_reserved(rl, PCI_RES_BUS, *rid)) {
3741 res = resource_list_reserve(rl, dev, child, PCI_RES_BUS, rid,
3742 start, end, count, flags & ~RF_ACTIVE);
3744 resource_list_delete(rl, PCI_RES_BUS, *rid);
3745 device_printf(child, "allocating %ju bus%s failed\n",
3746 count, count == 1 ? "" : "es");
3750 device_printf(child,
3751 "Lazy allocation of %ju bus%s at %ju\n", count,
3752 count == 1 ? "" : "es", rman_get_start(res));
3753 PCI_WRITE_CONFIG(dev, child, sec_reg, rman_get_start(res), 1);
3754 PCI_WRITE_CONFIG(dev, child, sub_reg, rman_get_end(res), 1);
3756 return (resource_list_alloc(rl, dev, child, PCI_RES_BUS, rid, start,
3757 end, count, flags));
3762 pci_ea_bei_to_rid(device_t dev, int bei)
3765 struct pci_devinfo *dinfo;
3767 struct pcicfg_iov *iov;
3769 dinfo = device_get_ivars(dev);
3770 iov = dinfo->cfg.iov;
3772 iov_pos = iov->iov_pos;
3777 /* Check if matches BAR */
3778 if ((bei >= PCIM_EA_BEI_BAR_0) &&
3779 (bei <= PCIM_EA_BEI_BAR_5))
3780 return (PCIR_BAR(bei));
3783 if (bei == PCIM_EA_BEI_ROM)
3787 /* Check if matches VF_BAR */
3788 if ((iov != NULL) && (bei >= PCIM_EA_BEI_VF_BAR_0) &&
3789 (bei <= PCIM_EA_BEI_VF_BAR_5))
3790 return (PCIR_SRIOV_BAR(bei - PCIM_EA_BEI_VF_BAR_0) +
3798 pci_ea_is_enabled(device_t dev, int rid)
3800 struct pci_ea_entry *ea;
3801 struct pci_devinfo *dinfo;
3803 dinfo = device_get_ivars(dev);
3805 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3806 if (pci_ea_bei_to_rid(dev, ea->eae_bei) == rid)
3807 return ((ea->eae_flags & PCIM_EA_ENABLE) > 0);
3814 pci_add_resources_ea(device_t bus, device_t dev, int alloc_iov)
3816 struct pci_ea_entry *ea;
3817 struct pci_devinfo *dinfo;
3818 pci_addr_t start, end, count;
3819 struct resource_list *rl;
3820 int type, flags, rid;
3821 struct resource *res;
3824 struct pcicfg_iov *iov;
3827 dinfo = device_get_ivars(dev);
3828 rl = &dinfo->resources;
3832 iov = dinfo->cfg.iov;
3835 if (dinfo->cfg.ea.ea_location == 0)
3838 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3841 * TODO: Ignore EA-BAR if is not enabled.
3842 * Currently the EA implementation supports
3843 * only situation, where EA structure contains
3844 * predefined entries. In case they are not enabled
3845 * leave them unallocated and proceed with
3846 * a legacy-BAR mechanism.
3848 if ((ea->eae_flags & PCIM_EA_ENABLE) == 0)
3851 switch ((ea->eae_flags & PCIM_EA_PP) >> PCIM_EA_PP_OFFSET) {
3852 case PCIM_EA_P_MEM_PREFETCH:
3853 case PCIM_EA_P_VF_MEM_PREFETCH:
3854 flags = RF_PREFETCHABLE;
3856 case PCIM_EA_P_VF_MEM:
3858 type = SYS_RES_MEMORY;
3861 type = SYS_RES_IOPORT;
3867 if (alloc_iov != 0) {
3869 /* Allocating IOV, confirm BEI matches */
3870 if ((ea->eae_bei < PCIM_EA_BEI_VF_BAR_0) ||
3871 (ea->eae_bei > PCIM_EA_BEI_VF_BAR_5))
3877 /* Allocating BAR, confirm BEI matches */
3878 if (((ea->eae_bei < PCIM_EA_BEI_BAR_0) ||
3879 (ea->eae_bei > PCIM_EA_BEI_BAR_5)) &&
3880 (ea->eae_bei != PCIM_EA_BEI_ROM))
3884 rid = pci_ea_bei_to_rid(dev, ea->eae_bei);
3888 /* Skip resources already allocated by EA */
3889 if ((resource_list_find(rl, SYS_RES_MEMORY, rid) != NULL) ||
3890 (resource_list_find(rl, SYS_RES_IOPORT, rid) != NULL))
3893 start = ea->eae_base;
3894 count = ea->eae_max_offset + 1;
3897 count = count * iov->iov_num_vfs;
3899 end = start + count - 1;
3903 resource_list_add(rl, type, rid, start, end, count);
3904 res = resource_list_reserve(rl, bus, dev, type, &rid, start, end, count,
3907 resource_list_delete(rl, type, rid);
3910 * Failed to allocate using EA, disable entry.
3911 * Another attempt to allocation will be performed
3912 * further, but this time using legacy BAR registers
3914 tmp = pci_read_config(dev, ea->eae_cfg_offset, 4);
3915 tmp &= ~PCIM_EA_ENABLE;
3916 pci_write_config(dev, ea->eae_cfg_offset, tmp, 4);
3919 * Disabling entry might fail in case it is hardwired.
3920 * Read flags again to match current status.
3922 ea->eae_flags = pci_read_config(dev, ea->eae_cfg_offset, 4);
3927 /* As per specification, fill BAR with zeros */
3928 pci_write_config(dev, rid, 0, 4);
3933 pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask)
3935 struct pci_devinfo *dinfo;
3937 struct resource_list *rl;
3938 const struct pci_quirk *q;
3942 dinfo = device_get_ivars(dev);
3944 rl = &dinfo->resources;
3945 devid = (cfg->device << 16) | cfg->vendor;
3947 /* Allocate resources using Enhanced Allocation */
3948 pci_add_resources_ea(bus, dev, 0);
3950 /* ATA devices needs special map treatment */
3951 if ((pci_get_class(dev) == PCIC_STORAGE) &&
3952 (pci_get_subclass(dev) == PCIS_STORAGE_IDE) &&
3953 ((pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) ||
3954 (!pci_read_config(dev, PCIR_BAR(0), 4) &&
3955 !pci_read_config(dev, PCIR_BAR(2), 4))) )
3956 pci_ata_maps(bus, dev, rl, force, prefetchmask);
3958 for (i = 0; i < cfg->nummaps;) {
3959 /* Skip resources already managed by EA */
3960 if ((resource_list_find(rl, SYS_RES_MEMORY, PCIR_BAR(i)) != NULL) ||
3961 (resource_list_find(rl, SYS_RES_IOPORT, PCIR_BAR(i)) != NULL) ||
3962 pci_ea_is_enabled(dev, PCIR_BAR(i))) {
3968 * Skip quirked resources.
3970 for (q = &pci_quirks[0]; q->devid != 0; q++)
3971 if (q->devid == devid &&
3972 q->type == PCI_QUIRK_UNMAP_REG &&
3973 q->arg1 == PCIR_BAR(i))
3975 if (q->devid != 0) {
3979 i += pci_add_map(bus, dev, PCIR_BAR(i), rl, force,
3980 prefetchmask & (1 << i));
3984 * Add additional, quirked resources.
3986 for (q = &pci_quirks[0]; q->devid != 0; q++)
3987 if (q->devid == devid && q->type == PCI_QUIRK_MAP_REG)
3988 pci_add_map(bus, dev, q->arg1, rl, force, 0);
3990 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) {
3991 #ifdef __PCI_REROUTE_INTERRUPT
3993 * Try to re-route interrupts. Sometimes the BIOS or
3994 * firmware may leave bogus values in these registers.
3995 * If the re-route fails, then just stick with what we
3998 pci_assign_interrupt(bus, dev, 1);
4000 pci_assign_interrupt(bus, dev, 0);
4004 if (pci_usb_takeover && pci_get_class(dev) == PCIC_SERIALBUS &&
4005 pci_get_subclass(dev) == PCIS_SERIALBUS_USB) {
4006 if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_XHCI)
4007 xhci_early_takeover(dev);
4008 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_EHCI)
4009 ehci_early_takeover(dev);
4010 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_OHCI)
4011 ohci_early_takeover(dev);
4012 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI)
4013 uhci_early_takeover(dev);
4016 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
4018 * Reserve resources for secondary bus ranges behind bridge
4021 pci_reserve_secbus(bus, dev, cfg, rl);
4025 static struct pci_devinfo *
4026 pci_identify_function(device_t pcib, device_t dev, int domain, int busno,
4029 struct pci_devinfo *dinfo;
4031 dinfo = pci_read_device(pcib, dev, domain, busno, slot, func);
4033 pci_add_child(dev, dinfo);
4039 pci_add_children(device_t dev, int domain, int busno)
4041 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4042 device_t pcib = device_get_parent(dev);
4043 struct pci_devinfo *dinfo;
4045 int s, f, pcifunchigh;
4050 * Try to detect a device at slot 0, function 0. If it exists, try to
4051 * enable ARI. We must enable ARI before detecting the rest of the
4052 * functions on this bus as ARI changes the set of slots and functions
4053 * that are legal on this bus.
4055 dinfo = pci_identify_function(pcib, dev, domain, busno, 0, 0);
4056 if (dinfo != NULL && pci_enable_ari)
4057 PCIB_TRY_ENABLE_ARI(pcib, dinfo->cfg.dev);
4060 * Start looking for new devices on slot 0 at function 1 because we
4061 * just identified the device at slot 0, function 0.
4065 maxslots = PCIB_MAXSLOTS(pcib);
4066 for (s = 0; s <= maxslots; s++, first_func = 0) {
4070 hdrtype = REG(PCIR_HDRTYPE, 1);
4071 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4073 if (hdrtype & PCIM_MFDEV)
4074 pcifunchigh = PCIB_MAXFUNCS(pcib);
4075 for (f = first_func; f <= pcifunchigh; f++)
4076 pci_identify_function(pcib, dev, domain, busno, s, f);
4082 pci_rescan_method(device_t dev)
4084 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4085 device_t pcib = device_get_parent(dev);
4086 device_t child, *devlist, *unchanged;
4087 int devcount, error, i, j, maxslots, oldcount;
4088 int busno, domain, s, f, pcifunchigh;
4091 /* No need to check for ARI on a rescan. */
4092 error = device_get_children(dev, &devlist, &devcount);
4095 if (devcount != 0) {
4096 unchanged = malloc(devcount * sizeof(device_t), M_TEMP,
4098 if (unchanged == NULL) {
4099 free(devlist, M_TEMP);
4105 domain = pcib_get_domain(dev);
4106 busno = pcib_get_bus(dev);
4107 maxslots = PCIB_MAXSLOTS(pcib);
4108 for (s = 0; s <= maxslots; s++) {
4109 /* If function 0 is not present, skip to the next slot. */
4111 if (REG(PCIR_VENDOR, 2) == 0xffff)
4114 hdrtype = REG(PCIR_HDRTYPE, 1);
4115 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4117 if (hdrtype & PCIM_MFDEV)
4118 pcifunchigh = PCIB_MAXFUNCS(pcib);
4119 for (f = 0; f <= pcifunchigh; f++) {
4120 if (REG(PCIR_VENDOR, 2) == 0xffff)
4124 * Found a valid function. Check if a
4125 * device_t for this device already exists.
4127 for (i = 0; i < devcount; i++) {
4131 if (pci_get_slot(child) == s &&
4132 pci_get_function(child) == f) {
4133 unchanged[i] = child;
4138 pci_identify_function(pcib, dev, domain, busno, s, f);
4143 /* Remove devices that are no longer present. */
4144 for (i = 0; i < devcount; i++) {
4145 if (unchanged[i] != NULL)
4147 device_delete_child(dev, devlist[i]);
4150 free(devlist, M_TEMP);
4151 oldcount = devcount;
4153 /* Try to attach the devices just added. */
4154 error = device_get_children(dev, &devlist, &devcount);
4156 free(unchanged, M_TEMP);
4160 for (i = 0; i < devcount; i++) {
4161 for (j = 0; j < oldcount; j++) {
4162 if (devlist[i] == unchanged[j])
4166 device_probe_and_attach(devlist[i]);
4170 free(unchanged, M_TEMP);
4171 free(devlist, M_TEMP);
4178 pci_add_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
4181 struct pci_devinfo *vf_dinfo;
4183 int busno, slot, func;
4185 pcib = device_get_parent(bus);
4187 PCIB_DECODE_RID(pcib, rid, &busno, &slot, &func);
4189 vf_dinfo = pci_fill_devinfo(pcib, bus, pci_get_domain(pcib), busno,
4190 slot, func, vid, did);
4192 vf_dinfo->cfg.flags |= PCICFG_VF;
4193 pci_add_child(bus, vf_dinfo);
4195 return (vf_dinfo->cfg.dev);
4199 pci_create_iov_child_method(device_t bus, device_t pf, uint16_t rid,
4200 uint16_t vid, uint16_t did)
4203 return (pci_add_iov_child(bus, pf, rid, vid, did));
4208 pci_add_child(device_t bus, struct pci_devinfo *dinfo)
4210 dinfo->cfg.dev = device_add_child(bus, NULL, -1);
4211 device_set_ivars(dinfo->cfg.dev, dinfo);
4212 resource_list_init(&dinfo->resources);
4213 pci_cfg_save(dinfo->cfg.dev, dinfo, 0);
4214 pci_cfg_restore(dinfo->cfg.dev, dinfo);
4215 pci_print_verbose(dinfo);
4216 pci_add_resources(bus, dinfo->cfg.dev, 0, 0);
4217 pci_child_added(dinfo->cfg.dev);
4218 EVENTHANDLER_INVOKE(pci_add_device, dinfo->cfg.dev);
4222 pci_child_added_method(device_t dev, device_t child)
4228 pci_probe(device_t dev)
4231 device_set_desc(dev, "PCI bus");
4233 /* Allow other subclasses to override this driver. */
4234 return (BUS_PROBE_GENERIC);
4238 pci_attach_common(device_t dev)
4240 struct pci_softc *sc;
4242 #ifdef PCI_DMA_BOUNDARY
4243 int error, tag_valid;
4249 sc = device_get_softc(dev);
4250 domain = pcib_get_domain(dev);
4251 busno = pcib_get_bus(dev);
4254 sc->sc_bus = bus_alloc_resource(dev, PCI_RES_BUS, &rid, busno, busno,
4256 if (sc->sc_bus == NULL) {
4257 device_printf(dev, "failed to allocate bus number\n");
4262 device_printf(dev, "domain=%d, physical bus=%d\n",
4264 #ifdef PCI_DMA_BOUNDARY
4266 if (device_get_devclass(device_get_parent(device_get_parent(dev))) !=
4267 devclass_find("pci")) {
4268 error = bus_dma_tag_create(bus_get_dma_tag(dev), 1,
4269 PCI_DMA_BOUNDARY, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
4270 NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
4271 BUS_SPACE_MAXSIZE, 0, NULL, NULL, &sc->sc_dma_tag);
4273 device_printf(dev, "Failed to create DMA tag: %d\n",
4280 sc->sc_dma_tag = bus_get_dma_tag(dev);
4285 pci_attach(device_t dev)
4287 int busno, domain, error;
4289 error = pci_attach_common(dev);
4294 * Since there can be multiple independently numbered PCI
4295 * buses on systems with multiple PCI domains, we can't use
4296 * the unit number to decide which bus we are probing. We ask
4297 * the parent pcib what our domain and bus numbers are.
4299 domain = pcib_get_domain(dev);
4300 busno = pcib_get_bus(dev);
4301 pci_add_children(dev, domain, busno);
4302 return (bus_generic_attach(dev));
4306 pci_detach(device_t dev)
4309 struct pci_softc *sc;
4313 error = bus_generic_detach(dev);
4317 sc = device_get_softc(dev);
4318 error = bus_release_resource(dev, PCI_RES_BUS, 0, sc->sc_bus);
4322 return (device_delete_children(dev));
4326 pci_hint_device_unit(device_t dev, device_t child, const char *name, int *unitp)
4330 char me1[24], me2[32];
4334 d = pci_get_domain(child);
4335 b = pci_get_bus(child);
4336 s = pci_get_slot(child);
4337 f = pci_get_function(child);
4338 snprintf(me1, sizeof(me1), "pci%u:%u:%u", b, s, f);
4339 snprintf(me2, sizeof(me2), "pci%u:%u:%u:%u", d, b, s, f);
4341 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) {
4342 resource_string_value(name, unit, "at", &at);
4343 if (strcmp(at, me1) != 0 && strcmp(at, me2) != 0)
4344 continue; /* No match, try next candidate */
4351 pci_set_power_child(device_t dev, device_t child, int state)
4357 * Set the device to the given state. If the firmware suggests
4358 * a different power state, use it instead. If power management
4359 * is not present, the firmware is responsible for managing
4360 * device power. Skip children who aren't attached since they
4361 * are handled separately.
4363 pcib = device_get_parent(dev);
4365 if (device_is_attached(child) &&
4366 PCIB_POWER_FOR_SLEEP(pcib, child, &dstate) == 0)
4367 pci_set_powerstate(child, dstate);
4371 pci_suspend_child(device_t dev, device_t child)
4373 struct pci_devinfo *dinfo;
4376 dinfo = device_get_ivars(child);
4379 * Save the PCI configuration space for the child and set the
4380 * device in the appropriate power state for this sleep state.
4382 pci_cfg_save(child, dinfo, 0);
4384 /* Suspend devices before potentially powering them down. */
4385 error = bus_generic_suspend_child(dev, child);
4390 if (pci_do_power_suspend)
4391 pci_set_power_child(dev, child, PCI_POWERSTATE_D3);
4397 pci_resume_child(device_t dev, device_t child)
4399 struct pci_devinfo *dinfo;
4401 if (pci_do_power_resume)
4402 pci_set_power_child(dev, child, PCI_POWERSTATE_D0);
4404 dinfo = device_get_ivars(child);
4405 pci_cfg_restore(child, dinfo);
4406 if (!device_is_attached(child))
4407 pci_cfg_save(child, dinfo, 1);
4409 bus_generic_resume_child(dev, child);
4415 pci_resume(device_t dev)
4417 device_t child, *devlist;
4418 int error, i, numdevs;
4420 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0)
4424 * Resume critical devices first, then everything else later.
4426 for (i = 0; i < numdevs; i++) {
4428 switch (pci_get_class(child)) {
4432 case PCIC_BASEPERIPH:
4433 BUS_RESUME_CHILD(dev, child);
4437 for (i = 0; i < numdevs; i++) {
4439 switch (pci_get_class(child)) {
4443 case PCIC_BASEPERIPH:
4446 BUS_RESUME_CHILD(dev, child);
4449 free(devlist, M_TEMP);
4454 pci_load_vendor_data(void)
4460 data = preload_search_by_type("pci_vendor_data");
4462 ptr = preload_fetch_addr(data);
4463 sz = preload_fetch_size(data);
4464 if (ptr != NULL && sz != 0) {
4465 pci_vendordata = ptr;
4466 pci_vendordata_size = sz;
4467 /* terminate the database */
4468 pci_vendordata[pci_vendordata_size] = '\n';
4474 pci_driver_added(device_t dev, driver_t *driver)
4479 struct pci_devinfo *dinfo;
4483 device_printf(dev, "driver added\n");
4484 DEVICE_IDENTIFY(driver, dev);
4485 if (device_get_children(dev, &devlist, &numdevs) != 0)
4487 for (i = 0; i < numdevs; i++) {
4489 if (device_get_state(child) != DS_NOTPRESENT)
4491 dinfo = device_get_ivars(child);
4492 pci_print_verbose(dinfo);
4494 pci_printf(&dinfo->cfg, "reprobing on driver added\n");
4495 pci_cfg_restore(child, dinfo);
4496 if (device_probe_and_attach(child) != 0)
4497 pci_child_detached(dev, child);
4499 free(devlist, M_TEMP);
4503 pci_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
4504 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep)
4506 struct pci_devinfo *dinfo;
4507 struct msix_table_entry *mte;
4508 struct msix_vector *mv;
4514 error = bus_generic_setup_intr(dev, child, irq, flags, filter, intr,
4519 /* If this is not a direct child, just bail out. */
4520 if (device_get_parent(child) != dev) {
4525 rid = rman_get_rid(irq);
4527 /* Make sure that INTx is enabled */
4528 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4531 * Check to see if the interrupt is MSI or MSI-X.
4532 * Ask our parent to map the MSI and give
4533 * us the address and data register values.
4534 * If we fail for some reason, teardown the
4535 * interrupt handler.
4537 dinfo = device_get_ivars(child);
4538 if (dinfo->cfg.msi.msi_alloc > 0) {
4539 if (dinfo->cfg.msi.msi_addr == 0) {
4540 KASSERT(dinfo->cfg.msi.msi_handlers == 0,
4541 ("MSI has handlers, but vectors not mapped"));
4542 error = PCIB_MAP_MSI(device_get_parent(dev),
4543 child, rman_get_start(irq), &addr, &data);
4546 dinfo->cfg.msi.msi_addr = addr;
4547 dinfo->cfg.msi.msi_data = data;
4549 if (dinfo->cfg.msi.msi_handlers == 0)
4550 pci_enable_msi(child, dinfo->cfg.msi.msi_addr,
4551 dinfo->cfg.msi.msi_data);
4552 dinfo->cfg.msi.msi_handlers++;
4554 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4555 ("No MSI or MSI-X interrupts allocated"));
4556 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4557 ("MSI-X index too high"));
4558 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4559 KASSERT(mte->mte_vector != 0, ("no message vector"));
4560 mv = &dinfo->cfg.msix.msix_vectors[mte->mte_vector - 1];
4561 KASSERT(mv->mv_irq == rman_get_start(irq),
4563 if (mv->mv_address == 0) {
4564 KASSERT(mte->mte_handlers == 0,
4565 ("MSI-X table entry has handlers, but vector not mapped"));
4566 error = PCIB_MAP_MSI(device_get_parent(dev),
4567 child, rman_get_start(irq), &addr, &data);
4570 mv->mv_address = addr;
4575 * The MSIX table entry must be made valid by
4576 * incrementing the mte_handlers before
4577 * calling pci_enable_msix() and
4578 * pci_resume_msix(). Else the MSIX rewrite
4579 * table quirk will not work as expected.
4581 mte->mte_handlers++;
4582 if (mte->mte_handlers == 1) {
4583 pci_enable_msix(child, rid - 1, mv->mv_address,
4585 pci_unmask_msix(child, rid - 1);
4590 * Make sure that INTx is disabled if we are using MSI/MSI-X,
4591 * unless the device is affected by PCI_QUIRK_MSI_INTX_BUG,
4592 * in which case we "enable" INTx so MSI/MSI-X actually works.
4594 if (!pci_has_quirk(pci_get_devid(child),
4595 PCI_QUIRK_MSI_INTX_BUG))
4596 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4598 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4601 (void)bus_generic_teardown_intr(dev, child, irq,
4611 pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
4614 struct msix_table_entry *mte;
4615 struct resource_list_entry *rle;
4616 struct pci_devinfo *dinfo;
4619 if (irq == NULL || !(rman_get_flags(irq) & RF_ACTIVE))
4622 /* If this isn't a direct child, just bail out */
4623 if (device_get_parent(child) != dev)
4624 return(bus_generic_teardown_intr(dev, child, irq, cookie));
4626 rid = rman_get_rid(irq);
4629 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4632 * Check to see if the interrupt is MSI or MSI-X. If so,
4633 * decrement the appropriate handlers count and mask the
4634 * MSI-X message, or disable MSI messages if the count
4637 dinfo = device_get_ivars(child);
4638 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, rid);
4639 if (rle->res != irq)
4641 if (dinfo->cfg.msi.msi_alloc > 0) {
4642 KASSERT(rid <= dinfo->cfg.msi.msi_alloc,
4643 ("MSI-X index too high"));
4644 if (dinfo->cfg.msi.msi_handlers == 0)
4646 dinfo->cfg.msi.msi_handlers--;
4647 if (dinfo->cfg.msi.msi_handlers == 0)
4648 pci_disable_msi(child);
4650 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4651 ("No MSI or MSI-X interrupts allocated"));
4652 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4653 ("MSI-X index too high"));
4654 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4655 if (mte->mte_handlers == 0)
4657 mte->mte_handlers--;
4658 if (mte->mte_handlers == 0)
4659 pci_mask_msix(child, rid - 1);
4662 error = bus_generic_teardown_intr(dev, child, irq, cookie);
4665 ("%s: generic teardown failed for MSI/MSI-X", __func__));
4670 pci_print_child(device_t dev, device_t child)
4672 struct pci_devinfo *dinfo;
4673 struct resource_list *rl;
4676 dinfo = device_get_ivars(child);
4677 rl = &dinfo->resources;
4679 retval += bus_print_child_header(dev, child);
4681 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
4682 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
4683 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
4684 if (device_get_flags(dev))
4685 retval += printf(" flags %#x", device_get_flags(dev));
4687 retval += printf(" at device %d.%d", pci_get_slot(child),
4688 pci_get_function(child));
4690 retval += bus_print_child_domain(dev, child);
4691 retval += bus_print_child_footer(dev, child);
4700 int report; /* 0 = bootverbose, 1 = always */
4702 } pci_nomatch_tab[] = {
4703 {PCIC_OLD, -1, 1, "old"},
4704 {PCIC_OLD, PCIS_OLD_NONVGA, 1, "non-VGA display device"},
4705 {PCIC_OLD, PCIS_OLD_VGA, 1, "VGA-compatible display device"},
4706 {PCIC_STORAGE, -1, 1, "mass storage"},
4707 {PCIC_STORAGE, PCIS_STORAGE_SCSI, 1, "SCSI"},
4708 {PCIC_STORAGE, PCIS_STORAGE_IDE, 1, "ATA"},
4709 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, 1, "floppy disk"},
4710 {PCIC_STORAGE, PCIS_STORAGE_IPI, 1, "IPI"},
4711 {PCIC_STORAGE, PCIS_STORAGE_RAID, 1, "RAID"},
4712 {PCIC_STORAGE, PCIS_STORAGE_ATA_ADMA, 1, "ATA (ADMA)"},
4713 {PCIC_STORAGE, PCIS_STORAGE_SATA, 1, "SATA"},
4714 {PCIC_STORAGE, PCIS_STORAGE_SAS, 1, "SAS"},
4715 {PCIC_STORAGE, PCIS_STORAGE_NVM, 1, "NVM"},
4716 {PCIC_NETWORK, -1, 1, "network"},
4717 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, 1, "ethernet"},
4718 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, 1, "token ring"},
4719 {PCIC_NETWORK, PCIS_NETWORK_FDDI, 1, "fddi"},
4720 {PCIC_NETWORK, PCIS_NETWORK_ATM, 1, "ATM"},
4721 {PCIC_NETWORK, PCIS_NETWORK_ISDN, 1, "ISDN"},
4722 {PCIC_DISPLAY, -1, 1, "display"},
4723 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, 1, "VGA"},
4724 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, 1, "XGA"},
4725 {PCIC_DISPLAY, PCIS_DISPLAY_3D, 1, "3D"},
4726 {PCIC_MULTIMEDIA, -1, 1, "multimedia"},
4727 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, 1, "video"},
4728 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, 1, "audio"},
4729 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_TELE, 1, "telephony"},
4730 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_HDA, 1, "HDA"},
4731 {PCIC_MEMORY, -1, 1, "memory"},
4732 {PCIC_MEMORY, PCIS_MEMORY_RAM, 1, "RAM"},
4733 {PCIC_MEMORY, PCIS_MEMORY_FLASH, 1, "flash"},
4734 {PCIC_BRIDGE, -1, 1, "bridge"},
4735 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, 1, "HOST-PCI"},
4736 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, 1, "PCI-ISA"},
4737 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, 1, "PCI-EISA"},
4738 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, 1, "PCI-MCA"},
4739 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, 1, "PCI-PCI"},
4740 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, 1, "PCI-PCMCIA"},
4741 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, 1, "PCI-NuBus"},
4742 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, 1, "PCI-CardBus"},
4743 {PCIC_BRIDGE, PCIS_BRIDGE_RACEWAY, 1, "PCI-RACEway"},
4744 {PCIC_SIMPLECOMM, -1, 1, "simple comms"},
4745 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, 1, "UART"}, /* could detect 16550 */
4746 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, 1, "parallel port"},
4747 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MULSER, 1, "multiport serial"},
4748 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MODEM, 1, "generic modem"},
4749 {PCIC_BASEPERIPH, -1, 0, "base peripheral"},
4750 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, 1, "interrupt controller"},
4751 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, 1, "DMA controller"},
4752 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, 1, "timer"},
4753 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, 1, "realtime clock"},
4754 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PCIHOT, 1, "PCI hot-plug controller"},
4755 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_SDHC, 1, "SD host controller"},
4756 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_IOMMU, 1, "IOMMU"},
4757 {PCIC_INPUTDEV, -1, 1, "input device"},
4758 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, 1, "keyboard"},
4759 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,1, "digitizer"},
4760 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, 1, "mouse"},
4761 {PCIC_INPUTDEV, PCIS_INPUTDEV_SCANNER, 1, "scanner"},
4762 {PCIC_INPUTDEV, PCIS_INPUTDEV_GAMEPORT, 1, "gameport"},
4763 {PCIC_DOCKING, -1, 1, "docking station"},
4764 {PCIC_PROCESSOR, -1, 1, "processor"},
4765 {PCIC_SERIALBUS, -1, 1, "serial bus"},
4766 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, 1, "FireWire"},
4767 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, 1, "AccessBus"},
4768 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, 1, "SSA"},
4769 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, 1, "USB"},
4770 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, 1, "Fibre Channel"},
4771 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, 0, "SMBus"},
4772 {PCIC_WIRELESS, -1, 1, "wireless controller"},
4773 {PCIC_WIRELESS, PCIS_WIRELESS_IRDA, 1, "iRDA"},
4774 {PCIC_WIRELESS, PCIS_WIRELESS_IR, 1, "IR"},
4775 {PCIC_WIRELESS, PCIS_WIRELESS_RF, 1, "RF"},
4776 {PCIC_INTELLIIO, -1, 1, "intelligent I/O controller"},
4777 {PCIC_INTELLIIO, PCIS_INTELLIIO_I2O, 1, "I2O"},
4778 {PCIC_SATCOM, -1, 1, "satellite communication"},
4779 {PCIC_SATCOM, PCIS_SATCOM_TV, 1, "sat TV"},
4780 {PCIC_SATCOM, PCIS_SATCOM_AUDIO, 1, "sat audio"},
4781 {PCIC_SATCOM, PCIS_SATCOM_VOICE, 1, "sat voice"},
4782 {PCIC_SATCOM, PCIS_SATCOM_DATA, 1, "sat data"},
4783 {PCIC_CRYPTO, -1, 1, "encrypt/decrypt"},
4784 {PCIC_CRYPTO, PCIS_CRYPTO_NETCOMP, 1, "network/computer crypto"},
4785 {PCIC_CRYPTO, PCIS_CRYPTO_ENTERTAIN, 1, "entertainment crypto"},
4786 {PCIC_DASP, -1, 0, "dasp"},
4787 {PCIC_DASP, PCIS_DASP_DPIO, 1, "DPIO module"},
4788 {PCIC_DASP, PCIS_DASP_PERFCNTRS, 1, "performance counters"},
4789 {PCIC_DASP, PCIS_DASP_COMM_SYNC, 1, "communication synchronizer"},
4790 {PCIC_DASP, PCIS_DASP_MGMT_CARD, 1, "signal processing management"},
4795 pci_probe_nomatch(device_t dev, device_t child)
4798 const char *cp, *scp;
4802 * Look for a listing for this device in a loaded device database.
4805 if ((device = pci_describe_device(child)) != NULL) {
4806 device_printf(dev, "<%s>", device);
4807 free(device, M_DEVBUF);
4810 * Scan the class/subclass descriptions for a general
4815 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
4816 if (pci_nomatch_tab[i].class == pci_get_class(child)) {
4817 if (pci_nomatch_tab[i].subclass == -1) {
4818 cp = pci_nomatch_tab[i].desc;
4819 report = pci_nomatch_tab[i].report;
4820 } else if (pci_nomatch_tab[i].subclass ==
4821 pci_get_subclass(child)) {
4822 scp = pci_nomatch_tab[i].desc;
4823 report = pci_nomatch_tab[i].report;
4827 if (report || bootverbose) {
4828 device_printf(dev, "<%s%s%s>",
4830 ((cp != NULL) && (scp != NULL)) ? ", " : "",
4834 if (report || bootverbose) {
4835 printf(" at device %d.%d (no driver attached)\n",
4836 pci_get_slot(child), pci_get_function(child));
4838 pci_cfg_save(child, device_get_ivars(child), 1);
4842 pci_child_detached(device_t dev, device_t child)
4844 struct pci_devinfo *dinfo;
4845 struct resource_list *rl;
4847 dinfo = device_get_ivars(child);
4848 rl = &dinfo->resources;
4851 * Have to deallocate IRQs before releasing any MSI messages and
4852 * have to release MSI messages before deallocating any memory
4855 if (resource_list_release_active(rl, dev, child, SYS_RES_IRQ) != 0)
4856 pci_printf(&dinfo->cfg, "Device leaked IRQ resources\n");
4857 if (dinfo->cfg.msi.msi_alloc != 0 || dinfo->cfg.msix.msix_alloc != 0) {
4858 pci_printf(&dinfo->cfg, "Device leaked MSI vectors\n");
4859 (void)pci_release_msi(child);
4861 if (resource_list_release_active(rl, dev, child, SYS_RES_MEMORY) != 0)
4862 pci_printf(&dinfo->cfg, "Device leaked memory resources\n");
4863 if (resource_list_release_active(rl, dev, child, SYS_RES_IOPORT) != 0)
4864 pci_printf(&dinfo->cfg, "Device leaked I/O resources\n");
4866 if (resource_list_release_active(rl, dev, child, PCI_RES_BUS) != 0)
4867 pci_printf(&dinfo->cfg, "Device leaked PCI bus numbers\n");
4870 pci_cfg_save(child, dinfo, 1);
4874 * Parse the PCI device database, if loaded, and return a pointer to a
4875 * description of the device.
4877 * The database is flat text formatted as follows:
4879 * Any line not in a valid format is ignored.
4880 * Lines are terminated with newline '\n' characters.
4882 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then
4885 * A DEVICE line is entered immediately below the corresponding VENDOR ID.
4886 * - devices cannot be listed without a corresponding VENDOR line.
4887 * A DEVICE line consists of a TAB, the 4 digit (hex) device code,
4888 * another TAB, then the device name.
4892 * Assuming (ptr) points to the beginning of a line in the database,
4893 * return the vendor or device and description of the next entry.
4894 * The value of (vendor) or (device) inappropriate for the entry type
4895 * is set to -1. Returns nonzero at the end of the database.
4897 * Note that this is slightly unrobust in the face of corrupt data;
4898 * we attempt to safeguard against this by spamming the end of the
4899 * database with a newline when we initialise.
4902 pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc)
4911 left = pci_vendordata_size - (cp - pci_vendordata);
4919 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2)
4923 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2)
4926 /* skip to next line */
4927 while (*cp != '\n' && left > 0) {
4936 /* skip to next line */
4937 while (*cp != '\n' && left > 0) {
4941 if (*cp == '\n' && left > 0)
4948 pci_describe_device(device_t dev)
4951 char *desc, *vp, *dp, *line;
4953 desc = vp = dp = NULL;
4956 * If we have no vendor data, we can't do anything.
4958 if (pci_vendordata == NULL)
4962 * Scan the vendor data looking for this device
4964 line = pci_vendordata;
4965 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
4968 if (pci_describe_parse_line(&line, &vendor, &device, &vp))
4970 if (vendor == pci_get_vendor(dev))
4973 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
4976 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) {
4984 if (device == pci_get_device(dev))
4988 snprintf(dp, 80, "0x%x", pci_get_device(dev));
4989 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) !=
4991 sprintf(desc, "%s, %s", vp, dp);
5001 pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
5003 struct pci_devinfo *dinfo;
5006 dinfo = device_get_ivars(child);
5010 case PCI_IVAR_ETHADDR:
5012 * The generic accessor doesn't deal with failure, so
5013 * we set the return value, then return an error.
5015 *((uint8_t **) result) = NULL;
5017 case PCI_IVAR_SUBVENDOR:
5018 *result = cfg->subvendor;
5020 case PCI_IVAR_SUBDEVICE:
5021 *result = cfg->subdevice;
5023 case PCI_IVAR_VENDOR:
5024 *result = cfg->vendor;
5026 case PCI_IVAR_DEVICE:
5027 *result = cfg->device;
5029 case PCI_IVAR_DEVID:
5030 *result = (cfg->device << 16) | cfg->vendor;
5032 case PCI_IVAR_CLASS:
5033 *result = cfg->baseclass;
5035 case PCI_IVAR_SUBCLASS:
5036 *result = cfg->subclass;
5038 case PCI_IVAR_PROGIF:
5039 *result = cfg->progif;
5041 case PCI_IVAR_REVID:
5042 *result = cfg->revid;
5044 case PCI_IVAR_INTPIN:
5045 *result = cfg->intpin;
5048 *result = cfg->intline;
5050 case PCI_IVAR_DOMAIN:
5051 *result = cfg->domain;
5057 *result = cfg->slot;
5059 case PCI_IVAR_FUNCTION:
5060 *result = cfg->func;
5062 case PCI_IVAR_CMDREG:
5063 *result = cfg->cmdreg;
5065 case PCI_IVAR_CACHELNSZ:
5066 *result = cfg->cachelnsz;
5068 case PCI_IVAR_MINGNT:
5069 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5073 *result = cfg->mingnt;
5075 case PCI_IVAR_MAXLAT:
5076 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5080 *result = cfg->maxlat;
5082 case PCI_IVAR_LATTIMER:
5083 *result = cfg->lattimer;
5092 pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
5094 struct pci_devinfo *dinfo;
5096 dinfo = device_get_ivars(child);
5099 case PCI_IVAR_INTPIN:
5100 dinfo->cfg.intpin = value;
5102 case PCI_IVAR_ETHADDR:
5103 case PCI_IVAR_SUBVENDOR:
5104 case PCI_IVAR_SUBDEVICE:
5105 case PCI_IVAR_VENDOR:
5106 case PCI_IVAR_DEVICE:
5107 case PCI_IVAR_DEVID:
5108 case PCI_IVAR_CLASS:
5109 case PCI_IVAR_SUBCLASS:
5110 case PCI_IVAR_PROGIF:
5111 case PCI_IVAR_REVID:
5113 case PCI_IVAR_DOMAIN:
5116 case PCI_IVAR_FUNCTION:
5117 return (EINVAL); /* disallow for now */
5124 #include "opt_ddb.h"
5126 #include <ddb/ddb.h>
5127 #include <sys/cons.h>
5130 * List resources based on pci map registers, used for within ddb
5133 DB_SHOW_COMMAND(pciregs, db_pci_dump)
5135 struct pci_devinfo *dinfo;
5136 struct devlist *devlist_head;
5139 int i, error, none_count;
5142 /* get the head of the device queue */
5143 devlist_head = &pci_devq;
5146 * Go through the list of devices and print out devices
5148 for (error = 0, i = 0,
5149 dinfo = STAILQ_FIRST(devlist_head);
5150 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !db_pager_quit;
5151 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
5153 /* Populate pd_name and pd_unit */
5156 name = device_get_name(dinfo->cfg.dev);
5159 db_printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x "
5160 "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
5161 (name && *name) ? name : "none",
5162 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) :
5164 p->pc_sel.pc_domain, p->pc_sel.pc_bus, p->pc_sel.pc_dev,
5165 p->pc_sel.pc_func, (p->pc_class << 16) |
5166 (p->pc_subclass << 8) | p->pc_progif,
5167 (p->pc_subdevice << 16) | p->pc_subvendor,
5168 (p->pc_device << 16) | p->pc_vendor,
5169 p->pc_revid, p->pc_hdr);
5174 static struct resource *
5175 pci_reserve_map(device_t dev, device_t child, int type, int *rid,
5176 rman_res_t start, rman_res_t end, rman_res_t count, u_int num,
5179 struct pci_devinfo *dinfo = device_get_ivars(child);
5180 struct resource_list *rl = &dinfo->resources;
5181 struct resource *res;
5184 pci_addr_t map, testval;
5189 /* If rid is managed by EA, ignore it */
5190 if (pci_ea_is_enabled(child, *rid))
5193 pm = pci_find_bar(child, *rid);
5195 /* This is a BAR that we failed to allocate earlier. */
5196 mapsize = pm->pm_size;
5200 * Weed out the bogons, and figure out how large the
5201 * BAR/map is. BARs that read back 0 here are bogus
5202 * and unimplemented. Note: atapci in legacy mode are
5203 * special and handled elsewhere in the code. If you
5204 * have a atapci device in legacy mode and it fails
5205 * here, that other code is broken.
5207 pci_read_bar(child, *rid, &map, &testval, NULL);
5210 * Determine the size of the BAR and ignore BARs with a size
5211 * of 0. Device ROM BARs use a different mask value.
5213 if (PCIR_IS_BIOS(&dinfo->cfg, *rid))
5214 mapsize = pci_romsize(testval);
5216 mapsize = pci_mapsize(testval);
5219 pm = pci_add_bar(child, *rid, map, mapsize);
5222 if (PCI_BAR_MEM(map) || PCIR_IS_BIOS(&dinfo->cfg, *rid)) {
5223 if (type != SYS_RES_MEMORY) {
5226 "child %s requested type %d for rid %#x,"
5227 " but the BAR says it is an memio\n",
5228 device_get_nameunit(child), type, *rid);
5232 if (type != SYS_RES_IOPORT) {
5235 "child %s requested type %d for rid %#x,"
5236 " but the BAR says it is an ioport\n",
5237 device_get_nameunit(child), type, *rid);
5243 * For real BARs, we need to override the size that
5244 * the driver requests, because that's what the BAR
5245 * actually uses and we would otherwise have a
5246 * situation where we might allocate the excess to
5247 * another driver, which won't work.
5249 count = ((pci_addr_t)1 << mapsize) * num;
5250 if (RF_ALIGNMENT(flags) < mapsize)
5251 flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize);
5252 if (PCI_BAR_MEM(map) && (map & PCIM_BAR_MEM_PREFETCH))
5253 flags |= RF_PREFETCHABLE;
5256 * Allocate enough resource, and then write back the
5257 * appropriate BAR for that resource.
5259 resource_list_add(rl, type, *rid, start, end, count);
5260 res = resource_list_reserve(rl, dev, child, type, rid, start, end,
5261 count, flags & ~RF_ACTIVE);
5263 resource_list_delete(rl, type, *rid);
5264 device_printf(child,
5265 "%#jx bytes of rid %#x res %d failed (%#jx, %#jx).\n",
5266 count, *rid, type, start, end);
5270 device_printf(child,
5271 "Lazy allocation of %#jx bytes rid %#x type %d at %#jx\n",
5272 count, *rid, type, rman_get_start(res));
5274 /* Disable decoding via the CMD register before updating the BAR */
5275 cmd = pci_read_config(child, PCIR_COMMAND, 2);
5276 pci_write_config(child, PCIR_COMMAND,
5277 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
5279 map = rman_get_start(res);
5280 pci_write_bar(child, pm, map);
5282 /* Restore the original value of the CMD register */
5283 pci_write_config(child, PCIR_COMMAND, cmd, 2);
5289 pci_alloc_multi_resource(device_t dev, device_t child, int type, int *rid,
5290 rman_res_t start, rman_res_t end, rman_res_t count, u_long num,
5293 struct pci_devinfo *dinfo;
5294 struct resource_list *rl;
5295 struct resource_list_entry *rle;
5296 struct resource *res;
5300 * Perform lazy resource allocation
5302 dinfo = device_get_ivars(child);
5303 rl = &dinfo->resources;
5306 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
5308 return (pci_alloc_secbus(dev, child, rid, start, end, count,
5313 * Can't alloc legacy interrupt once MSI messages have
5316 if (*rid == 0 && (cfg->msi.msi_alloc > 0 ||
5317 cfg->msix.msix_alloc > 0))
5321 * If the child device doesn't have an interrupt
5322 * routed and is deserving of an interrupt, try to
5325 if (*rid == 0 && !PCI_INTERRUPT_VALID(cfg->intline) &&
5327 pci_assign_interrupt(dev, child, 0);
5329 case SYS_RES_IOPORT:
5330 case SYS_RES_MEMORY:
5333 * PCI-PCI bridge I/O window resources are not BARs.
5334 * For those allocations just pass the request up the
5337 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE) {
5339 case PCIR_IOBASEL_1:
5340 case PCIR_MEMBASE_1:
5341 case PCIR_PMBASEL_1:
5343 * XXX: Should we bother creating a resource
5346 return (bus_generic_alloc_resource(dev, child,
5347 type, rid, start, end, count, flags));
5351 /* Reserve resources for this BAR if needed. */
5352 rle = resource_list_find(rl, type, *rid);
5354 res = pci_reserve_map(dev, child, type, rid, start, end,
5360 return (resource_list_alloc(rl, dev, child, type, rid,
5361 start, end, count, flags));
5365 pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
5366 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
5369 struct pci_devinfo *dinfo;
5372 if (device_get_parent(child) != dev)
5373 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
5374 type, rid, start, end, count, flags));
5377 dinfo = device_get_ivars(child);
5378 if (dinfo->cfg.flags & PCICFG_VF) {
5380 /* VFs can't have I/O BARs. */
5381 case SYS_RES_IOPORT:
5383 case SYS_RES_MEMORY:
5384 return (pci_vf_alloc_mem_resource(dev, child, rid,
5385 start, end, count, flags));
5388 /* Fall through for other types of resource allocations. */
5392 return (pci_alloc_multi_resource(dev, child, type, rid, start, end,
5397 pci_release_resource(device_t dev, device_t child, int type, int rid,
5400 struct pci_devinfo *dinfo;
5401 struct resource_list *rl;
5404 if (device_get_parent(child) != dev)
5405 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
5408 dinfo = device_get_ivars(child);
5412 if (dinfo->cfg.flags & PCICFG_VF) {
5414 /* VFs can't have I/O BARs. */
5415 case SYS_RES_IOPORT:
5417 case SYS_RES_MEMORY:
5418 return (pci_vf_release_mem_resource(dev, child, rid,
5422 /* Fall through for other types of resource allocations. */
5428 * PCI-PCI bridge I/O window resources are not BARs. For
5429 * those allocations just pass the request up the tree.
5431 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE &&
5432 (type == SYS_RES_IOPORT || type == SYS_RES_MEMORY)) {
5434 case PCIR_IOBASEL_1:
5435 case PCIR_MEMBASE_1:
5436 case PCIR_PMBASEL_1:
5437 return (bus_generic_release_resource(dev, child, type,
5443 rl = &dinfo->resources;
5444 return (resource_list_release(rl, dev, child, type, rid, r));
5448 pci_activate_resource(device_t dev, device_t child, int type, int rid,
5451 struct pci_devinfo *dinfo;
5454 error = bus_generic_activate_resource(dev, child, type, rid, r);
5458 /* Enable decoding in the command register when activating BARs. */
5459 if (device_get_parent(child) == dev) {
5460 /* Device ROMs need their decoding explicitly enabled. */
5461 dinfo = device_get_ivars(child);
5462 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5463 pci_write_bar(child, pci_find_bar(child, rid),
5464 rman_get_start(r) | PCIM_BIOS_ENABLE);
5466 case SYS_RES_IOPORT:
5467 case SYS_RES_MEMORY:
5468 error = PCI_ENABLE_IO(dev, child, type);
5476 pci_deactivate_resource(device_t dev, device_t child, int type,
5477 int rid, struct resource *r)
5479 struct pci_devinfo *dinfo;
5482 error = bus_generic_deactivate_resource(dev, child, type, rid, r);
5486 /* Disable decoding for device ROMs. */
5487 if (device_get_parent(child) == dev) {
5488 dinfo = device_get_ivars(child);
5489 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5490 pci_write_bar(child, pci_find_bar(child, rid),
5497 pci_child_deleted(device_t dev, device_t child)
5499 struct resource_list_entry *rle;
5500 struct resource_list *rl;
5501 struct pci_devinfo *dinfo;
5503 dinfo = device_get_ivars(child);
5504 rl = &dinfo->resources;
5506 EVENTHANDLER_INVOKE(pci_delete_device, child);
5508 /* Turn off access to resources we're about to free */
5509 if (bus_child_present(child) != 0) {
5510 pci_write_config(child, PCIR_COMMAND, pci_read_config(child,
5511 PCIR_COMMAND, 2) & ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2);
5513 pci_disable_busmaster(child);
5516 /* Free all allocated resources */
5517 STAILQ_FOREACH(rle, rl, link) {
5519 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5520 resource_list_busy(rl, rle->type, rle->rid)) {
5521 pci_printf(&dinfo->cfg,
5522 "Resource still owned, oops. "
5523 "(type=%d, rid=%d, addr=%lx)\n",
5524 rle->type, rle->rid,
5525 rman_get_start(rle->res));
5526 bus_release_resource(child, rle->type, rle->rid,
5529 resource_list_unreserve(rl, dev, child, rle->type,
5533 resource_list_free(rl);
5539 pci_delete_resource(device_t dev, device_t child, int type, int rid)
5541 struct pci_devinfo *dinfo;
5542 struct resource_list *rl;
5543 struct resource_list_entry *rle;
5545 if (device_get_parent(child) != dev)
5548 dinfo = device_get_ivars(child);
5549 rl = &dinfo->resources;
5550 rle = resource_list_find(rl, type, rid);
5555 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5556 resource_list_busy(rl, type, rid)) {
5557 device_printf(dev, "delete_resource: "
5558 "Resource still owned by child, oops. "
5559 "(type=%d, rid=%d, addr=%jx)\n",
5560 type, rid, rman_get_start(rle->res));
5563 resource_list_unreserve(rl, dev, child, type, rid);
5565 resource_list_delete(rl, type, rid);
5568 struct resource_list *
5569 pci_get_resource_list (device_t dev, device_t child)
5571 struct pci_devinfo *dinfo = device_get_ivars(child);
5573 return (&dinfo->resources);
5577 pci_get_dma_tag(device_t bus, device_t dev)
5579 struct pci_softc *sc = device_get_softc(bus);
5581 return (sc->sc_dma_tag);
5585 pci_read_config_method(device_t dev, device_t child, int reg, int width)
5587 struct pci_devinfo *dinfo = device_get_ivars(child);
5588 pcicfgregs *cfg = &dinfo->cfg;
5592 * SR-IOV VFs don't implement the VID or DID registers, so we have to
5593 * emulate them here.
5595 if (cfg->flags & PCICFG_VF) {
5596 if (reg == PCIR_VENDOR) {
5599 return (cfg->device << 16 | cfg->vendor);
5601 return (cfg->vendor);
5603 return (cfg->vendor & 0xff);
5605 return (0xffffffff);
5607 } else if (reg == PCIR_DEVICE) {
5609 /* Note that an unaligned 4-byte read is an error. */
5611 return (cfg->device);
5613 return (cfg->device & 0xff);
5615 return (0xffffffff);
5621 return (PCIB_READ_CONFIG(device_get_parent(dev),
5622 cfg->bus, cfg->slot, cfg->func, reg, width));
5626 pci_write_config_method(device_t dev, device_t child, int reg,
5627 uint32_t val, int width)
5629 struct pci_devinfo *dinfo = device_get_ivars(child);
5630 pcicfgregs *cfg = &dinfo->cfg;
5632 PCIB_WRITE_CONFIG(device_get_parent(dev),
5633 cfg->bus, cfg->slot, cfg->func, reg, val, width);
5637 pci_child_location_str_method(device_t dev, device_t child, char *buf,
5641 snprintf(buf, buflen, "slot=%d function=%d dbsf=pci%d:%d:%d:%d",
5642 pci_get_slot(child), pci_get_function(child), pci_get_domain(child),
5643 pci_get_bus(child), pci_get_slot(child), pci_get_function(child));
5648 pci_child_pnpinfo_str_method(device_t dev, device_t child, char *buf,
5651 struct pci_devinfo *dinfo;
5654 dinfo = device_get_ivars(child);
5656 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x "
5657 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device,
5658 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass,
5664 pci_assign_interrupt_method(device_t dev, device_t child)
5666 struct pci_devinfo *dinfo = device_get_ivars(child);
5667 pcicfgregs *cfg = &dinfo->cfg;
5669 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child,
5674 pci_lookup(void *arg, const char *name, device_t *dev)
5678 int domain, bus, slot, func;
5684 * Accept pciconf-style selectors of either pciD:B:S:F or
5685 * pciB:S:F. In the latter case, the domain is assumed to
5688 if (strncmp(name, "pci", 3) != 0)
5690 val = strtol(name + 3, &end, 10);
5691 if (val < 0 || val > INT_MAX || *end != ':')
5694 val = strtol(end + 1, &end, 10);
5695 if (val < 0 || val > INT_MAX || *end != ':')
5698 val = strtol(end + 1, &end, 10);
5699 if (val < 0 || val > INT_MAX)
5703 val = strtol(end + 1, &end, 10);
5704 if (val < 0 || val > INT_MAX || *end != '\0')
5707 } else if (*end == '\0') {
5715 if (domain > PCI_DOMAINMAX || bus > PCI_BUSMAX || slot > PCI_SLOTMAX ||
5716 func > PCIE_ARI_FUNCMAX || (slot != 0 && func > PCI_FUNCMAX))
5719 *dev = pci_find_dbsf(domain, bus, slot, func);
5723 pci_modevent(module_t mod, int what, void *arg)
5725 static struct cdev *pci_cdev;
5726 static eventhandler_tag tag;
5730 STAILQ_INIT(&pci_devq);
5732 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644,
5734 pci_load_vendor_data();
5735 tag = EVENTHANDLER_REGISTER(dev_lookup, pci_lookup, NULL,
5741 EVENTHANDLER_DEREGISTER(dev_lookup, tag);
5742 destroy_dev(pci_cdev);
5750 pci_cfg_restore_pcie(device_t dev, struct pci_devinfo *dinfo)
5752 #define WREG(n, v) pci_write_config(dev, pos + (n), (v), 2)
5753 struct pcicfg_pcie *cfg;
5756 cfg = &dinfo->cfg.pcie;
5757 pos = cfg->pcie_location;
5759 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
5761 WREG(PCIER_DEVICE_CTL, cfg->pcie_device_ctl);
5763 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5764 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
5765 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
5766 WREG(PCIER_LINK_CTL, cfg->pcie_link_ctl);
5768 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5769 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
5770 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
5771 WREG(PCIER_SLOT_CTL, cfg->pcie_slot_ctl);
5773 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5774 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
5775 WREG(PCIER_ROOT_CTL, cfg->pcie_root_ctl);
5778 WREG(PCIER_DEVICE_CTL2, cfg->pcie_device_ctl2);
5779 WREG(PCIER_LINK_CTL2, cfg->pcie_link_ctl2);
5780 WREG(PCIER_SLOT_CTL2, cfg->pcie_slot_ctl2);
5786 pci_cfg_restore_pcix(device_t dev, struct pci_devinfo *dinfo)
5788 pci_write_config(dev, dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND,
5789 dinfo->cfg.pcix.pcix_command, 2);
5793 pci_cfg_restore(device_t dev, struct pci_devinfo *dinfo)
5797 * Restore the device to full power mode. We must do this
5798 * before we restore the registers because moving from D3 to
5799 * D0 will cause the chip's BARs and some other registers to
5800 * be reset to some unknown power on reset values. Cut down
5801 * the noise on boot by doing nothing if we are already in
5804 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0)
5805 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
5806 pci_write_config(dev, PCIR_COMMAND, dinfo->cfg.cmdreg, 2);
5807 pci_write_config(dev, PCIR_INTLINE, dinfo->cfg.intline, 1);
5808 pci_write_config(dev, PCIR_INTPIN, dinfo->cfg.intpin, 1);
5809 pci_write_config(dev, PCIR_CACHELNSZ, dinfo->cfg.cachelnsz, 1);
5810 pci_write_config(dev, PCIR_LATTIMER, dinfo->cfg.lattimer, 1);
5811 pci_write_config(dev, PCIR_PROGIF, dinfo->cfg.progif, 1);
5812 pci_write_config(dev, PCIR_REVID, dinfo->cfg.revid, 1);
5813 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
5814 case PCIM_HDRTYPE_NORMAL:
5815 pci_write_config(dev, PCIR_MINGNT, dinfo->cfg.mingnt, 1);
5816 pci_write_config(dev, PCIR_MAXLAT, dinfo->cfg.maxlat, 1);
5818 case PCIM_HDRTYPE_BRIDGE:
5819 pci_write_config(dev, PCIR_SECLAT_1,
5820 dinfo->cfg.bridge.br_seclat, 1);
5821 pci_write_config(dev, PCIR_SUBBUS_1,
5822 dinfo->cfg.bridge.br_subbus, 1);
5823 pci_write_config(dev, PCIR_SECBUS_1,
5824 dinfo->cfg.bridge.br_secbus, 1);
5825 pci_write_config(dev, PCIR_PRIBUS_1,
5826 dinfo->cfg.bridge.br_pribus, 1);
5827 pci_write_config(dev, PCIR_BRIDGECTL_1,
5828 dinfo->cfg.bridge.br_control, 2);
5830 case PCIM_HDRTYPE_CARDBUS:
5831 pci_write_config(dev, PCIR_SECLAT_2,
5832 dinfo->cfg.bridge.br_seclat, 1);
5833 pci_write_config(dev, PCIR_SUBBUS_2,
5834 dinfo->cfg.bridge.br_subbus, 1);
5835 pci_write_config(dev, PCIR_SECBUS_2,
5836 dinfo->cfg.bridge.br_secbus, 1);
5837 pci_write_config(dev, PCIR_PRIBUS_2,
5838 dinfo->cfg.bridge.br_pribus, 1);
5839 pci_write_config(dev, PCIR_BRIDGECTL_2,
5840 dinfo->cfg.bridge.br_control, 2);
5843 pci_restore_bars(dev);
5846 * Restore extended capabilities for PCI-Express and PCI-X
5848 if (dinfo->cfg.pcie.pcie_location != 0)
5849 pci_cfg_restore_pcie(dev, dinfo);
5850 if (dinfo->cfg.pcix.pcix_location != 0)
5851 pci_cfg_restore_pcix(dev, dinfo);
5853 /* Restore MSI and MSI-X configurations if they are present. */
5854 if (dinfo->cfg.msi.msi_location != 0)
5855 pci_resume_msi(dev);
5856 if (dinfo->cfg.msix.msix_location != 0)
5857 pci_resume_msix(dev);
5860 if (dinfo->cfg.iov != NULL)
5861 pci_iov_cfg_restore(dev, dinfo);
5866 pci_cfg_save_pcie(device_t dev, struct pci_devinfo *dinfo)
5868 #define RREG(n) pci_read_config(dev, pos + (n), 2)
5869 struct pcicfg_pcie *cfg;
5872 cfg = &dinfo->cfg.pcie;
5873 pos = cfg->pcie_location;
5875 cfg->pcie_flags = RREG(PCIER_FLAGS);
5877 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
5879 cfg->pcie_device_ctl = RREG(PCIER_DEVICE_CTL);
5881 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5882 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
5883 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
5884 cfg->pcie_link_ctl = RREG(PCIER_LINK_CTL);
5886 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5887 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
5888 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
5889 cfg->pcie_slot_ctl = RREG(PCIER_SLOT_CTL);
5891 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5892 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
5893 cfg->pcie_root_ctl = RREG(PCIER_ROOT_CTL);
5896 cfg->pcie_device_ctl2 = RREG(PCIER_DEVICE_CTL2);
5897 cfg->pcie_link_ctl2 = RREG(PCIER_LINK_CTL2);
5898 cfg->pcie_slot_ctl2 = RREG(PCIER_SLOT_CTL2);
5904 pci_cfg_save_pcix(device_t dev, struct pci_devinfo *dinfo)
5906 dinfo->cfg.pcix.pcix_command = pci_read_config(dev,
5907 dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND, 2);
5911 pci_cfg_save(device_t dev, struct pci_devinfo *dinfo, int setstate)
5917 * Some drivers apparently write to these registers w/o updating our
5918 * cached copy. No harm happens if we update the copy, so do so here
5919 * so we can restore them. The COMMAND register is modified by the
5920 * bus w/o updating the cache. This should represent the normally
5921 * writable portion of the 'defined' part of type 0/1/2 headers.
5923 dinfo->cfg.vendor = pci_read_config(dev, PCIR_VENDOR, 2);
5924 dinfo->cfg.device = pci_read_config(dev, PCIR_DEVICE, 2);
5925 dinfo->cfg.cmdreg = pci_read_config(dev, PCIR_COMMAND, 2);
5926 dinfo->cfg.intline = pci_read_config(dev, PCIR_INTLINE, 1);
5927 dinfo->cfg.intpin = pci_read_config(dev, PCIR_INTPIN, 1);
5928 dinfo->cfg.cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
5929 dinfo->cfg.lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
5930 dinfo->cfg.baseclass = pci_read_config(dev, PCIR_CLASS, 1);
5931 dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1);
5932 dinfo->cfg.progif = pci_read_config(dev, PCIR_PROGIF, 1);
5933 dinfo->cfg.revid = pci_read_config(dev, PCIR_REVID, 1);
5934 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
5935 case PCIM_HDRTYPE_NORMAL:
5936 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_0, 2);
5937 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_0, 2);
5938 dinfo->cfg.mingnt = pci_read_config(dev, PCIR_MINGNT, 1);
5939 dinfo->cfg.maxlat = pci_read_config(dev, PCIR_MAXLAT, 1);
5941 case PCIM_HDRTYPE_BRIDGE:
5942 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
5944 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
5946 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
5948 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
5950 dinfo->cfg.bridge.br_control = pci_read_config(dev,
5951 PCIR_BRIDGECTL_1, 2);
5953 case PCIM_HDRTYPE_CARDBUS:
5954 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
5956 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
5958 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
5960 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
5962 dinfo->cfg.bridge.br_control = pci_read_config(dev,
5963 PCIR_BRIDGECTL_2, 2);
5964 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_2, 2);
5965 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_2, 2);
5969 if (dinfo->cfg.pcie.pcie_location != 0)
5970 pci_cfg_save_pcie(dev, dinfo);
5972 if (dinfo->cfg.pcix.pcix_location != 0)
5973 pci_cfg_save_pcix(dev, dinfo);
5976 if (dinfo->cfg.iov != NULL)
5977 pci_iov_cfg_save(dev, dinfo);
5981 * don't set the state for display devices, base peripherals and
5982 * memory devices since bad things happen when they are powered down.
5983 * We should (a) have drivers that can easily detach and (b) use
5984 * generic drivers for these devices so that some device actually
5985 * attaches. We need to make sure that when we implement (a) we don't
5986 * power the device down on a reattach.
5988 cls = pci_get_class(dev);
5991 switch (pci_do_power_nodriver)
5993 case 0: /* NO powerdown at all */
5995 case 1: /* Conservative about what to power down */
5996 if (cls == PCIC_STORAGE)
5999 case 2: /* Aggressive about what to power down */
6000 if (cls == PCIC_DISPLAY || cls == PCIC_MEMORY ||
6001 cls == PCIC_BASEPERIPH)
6004 case 3: /* Power down everything */
6008 * PCI spec says we can only go into D3 state from D0 state.
6009 * Transition from D[12] into D0 before going to D3 state.
6011 ps = pci_get_powerstate(dev);
6012 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6013 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6014 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3)
6015 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6018 /* Wrapper APIs suitable for device driver use. */
6020 pci_save_state(device_t dev)
6022 struct pci_devinfo *dinfo;
6024 dinfo = device_get_ivars(dev);
6025 pci_cfg_save(dev, dinfo, 0);
6029 pci_restore_state(device_t dev)
6031 struct pci_devinfo *dinfo;
6033 dinfo = device_get_ivars(dev);
6034 pci_cfg_restore(dev, dinfo);
6038 pci_get_id_method(device_t dev, device_t child, enum pci_id_type type,
6042 return (PCIB_GET_ID(device_get_parent(dev), child, type, id));
6045 /* Find the upstream port of a given PCI device in a root complex. */
6047 pci_find_pcie_root_port(device_t dev)
6049 struct pci_devinfo *dinfo;
6050 devclass_t pci_class;
6053 pci_class = devclass_find("pci");
6054 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class,
6055 ("%s: non-pci device %s", __func__, device_get_nameunit(dev)));
6058 * Walk the bridge hierarchy until we find a PCI-e root
6059 * port or a non-PCI device.
6062 bus = device_get_parent(dev);
6063 KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
6064 device_get_nameunit(dev)));
6066 pcib = device_get_parent(bus);
6067 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
6068 device_get_nameunit(bus)));
6071 * pcib's parent must be a PCI bus for this to be a
6074 if (device_get_devclass(device_get_parent(pcib)) != pci_class)
6077 dinfo = device_get_ivars(pcib);
6078 if (dinfo->cfg.pcie.pcie_location != 0 &&
6079 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT)
6087 * Wait for pending transactions to complete on a PCI-express function.
6089 * The maximum delay is specified in milliseconds in max_delay. Note
6090 * that this function may sleep.
6092 * Returns true if the function is idle and false if the timeout is
6093 * exceeded. If dev is not a PCI-express function, this returns true.
6096 pcie_wait_for_pending_transactions(device_t dev, u_int max_delay)
6098 struct pci_devinfo *dinfo = device_get_ivars(dev);
6102 cap = dinfo->cfg.pcie.pcie_location;
6106 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6107 while (sta & PCIEM_STA_TRANSACTION_PND) {
6111 /* Poll once every 100 milliseconds up to the timeout. */
6112 if (max_delay > 100) {
6113 pause_sbt("pcietp", 100 * SBT_1MS, 0, C_HARDCLOCK);
6116 pause_sbt("pcietp", max_delay * SBT_1MS, 0,
6120 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6127 * Determine the maximum Completion Timeout in microseconds.
6129 * For non-PCI-express functions this returns 0.
6132 pcie_get_max_completion_timeout(device_t dev)
6134 struct pci_devinfo *dinfo = device_get_ivars(dev);
6137 cap = dinfo->cfg.pcie.pcie_location;
6142 * Functions using the 1.x spec use the default timeout range of
6143 * 50 microseconds to 50 milliseconds. Functions that do not
6144 * support programmable timeouts also use this range.
6146 if ((dinfo->cfg.pcie.pcie_flags & PCIEM_FLAGS_VERSION) < 2 ||
6147 (pci_read_config(dev, cap + PCIER_DEVICE_CAP2, 4) &
6148 PCIEM_CAP2_COMP_TIMO_RANGES) == 0)
6151 switch (pci_read_config(dev, cap + PCIER_DEVICE_CTL2, 2) &
6152 PCIEM_CTL2_COMP_TIMO_VAL) {
6153 case PCIEM_CTL2_COMP_TIMO_100US:
6155 case PCIEM_CTL2_COMP_TIMO_10MS:
6157 case PCIEM_CTL2_COMP_TIMO_55MS:
6159 case PCIEM_CTL2_COMP_TIMO_210MS:
6160 return (210 * 1000);
6161 case PCIEM_CTL2_COMP_TIMO_900MS:
6162 return (900 * 1000);
6163 case PCIEM_CTL2_COMP_TIMO_3500MS:
6164 return (3500 * 1000);
6165 case PCIEM_CTL2_COMP_TIMO_13S:
6166 return (13 * 1000 * 1000);
6167 case PCIEM_CTL2_COMP_TIMO_64S:
6168 return (64 * 1000 * 1000);
6175 * Perform a Function Level Reset (FLR) on a device.
6177 * This function first waits for any pending transactions to complete
6178 * within the timeout specified by max_delay. If transactions are
6179 * still pending, the function will return false without attempting a
6182 * If dev is not a PCI-express function or does not support FLR, this
6183 * function returns false.
6185 * Note that no registers are saved or restored. The caller is
6186 * responsible for saving and restoring any registers including
6187 * PCI-standard registers via pci_save_state() and
6188 * pci_restore_state().
6191 pcie_flr(device_t dev, u_int max_delay, bool force)
6193 struct pci_devinfo *dinfo = device_get_ivars(dev);
6198 cap = dinfo->cfg.pcie.pcie_location;
6202 if (!(pci_read_config(dev, cap + PCIER_DEVICE_CAP, 4) & PCIEM_CAP_FLR))
6206 * Disable busmastering to prevent generation of new
6207 * transactions while waiting for the device to go idle. If
6208 * the idle timeout fails, the command register is restored
6209 * which will re-enable busmastering.
6211 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
6212 pci_write_config(dev, PCIR_COMMAND, cmd & ~(PCIM_CMD_BUSMASTEREN), 2);
6213 if (!pcie_wait_for_pending_transactions(dev, max_delay)) {
6215 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
6218 pci_printf(&dinfo->cfg,
6219 "Resetting with transactions pending after %d ms\n",
6223 * Extend the post-FLR delay to cover the maximum
6224 * Completion Timeout delay of anything in flight
6225 * during the FLR delay. Enforce a minimum delay of
6228 compl_delay = pcie_get_max_completion_timeout(dev) / 1000;
6229 if (compl_delay < 10)
6234 /* Initiate the reset. */
6235 ctl = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
6236 pci_write_config(dev, cap + PCIER_DEVICE_CTL, ctl |
6237 PCIEM_CTL_INITIATE_FLR, 2);
6239 /* Wait for 100ms. */
6240 pause_sbt("pcieflr", (100 + compl_delay) * SBT_1MS, 0, C_HARDCLOCK);
6242 if (pci_read_config(dev, cap + PCIER_DEVICE_STA, 2) &
6243 PCIEM_STA_TRANSACTION_PND)
6244 pci_printf(&dinfo->cfg, "Transactions pending after FLR!\n");