2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
5 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
6 * Copyright (c) 2000, BSDi
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
39 #include <sys/endian.h>
40 #include <sys/eventhandler.h>
41 #include <sys/fcntl.h>
42 #include <sys/kernel.h>
43 #include <sys/limits.h>
44 #include <sys/linker.h>
45 #include <sys/malloc.h>
46 #include <sys/module.h>
47 #include <sys/queue.h>
48 #include <sys/sysctl.h>
49 #include <sys/systm.h>
53 #include <vm/vm_extern.h>
56 #include <machine/bus.h>
58 #include <machine/resource.h>
59 #include <machine/stdarg.h>
61 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
62 #include <machine/intr_machdep.h>
65 #include <sys/pciio.h>
66 #include <dev/pci/pcireg.h>
67 #include <dev/pci/pcivar.h>
68 #include <dev/pci/pci_private.h>
72 #include <dev/pci/pci_iov_private.h>
75 #include <dev/usb/controller/xhcireg.h>
76 #include <dev/usb/controller/ehcireg.h>
77 #include <dev/usb/controller/ohcireg.h>
78 #include <dev/usb/controller/uhcireg.h>
83 #define PCIR_IS_BIOS(cfg, reg) \
84 (((cfg)->hdrtype == PCIM_HDRTYPE_NORMAL && reg == PCIR_BIOS) || \
85 ((cfg)->hdrtype == PCIM_HDRTYPE_BRIDGE && reg == PCIR_BIOS_1))
87 static int pci_has_quirk(uint32_t devid, int quirk);
88 static pci_addr_t pci_mapbase(uint64_t mapreg);
89 static const char *pci_maptype(uint64_t mapreg);
90 static int pci_maprange(uint64_t mapreg);
91 static pci_addr_t pci_rombase(uint64_t mapreg);
92 static int pci_romsize(uint64_t testval);
93 static void pci_fixancient(pcicfgregs *cfg);
94 static int pci_printf(pcicfgregs *cfg, const char *fmt, ...);
96 static int pci_porten(device_t dev);
97 static int pci_memen(device_t dev);
98 static void pci_assign_interrupt(device_t bus, device_t dev,
100 static int pci_add_map(device_t bus, device_t dev, int reg,
101 struct resource_list *rl, int force, int prefetch);
102 static int pci_probe(device_t dev);
103 static void pci_load_vendor_data(void);
104 static int pci_describe_parse_line(char **ptr, int *vendor,
105 int *device, char **desc);
106 static char *pci_describe_device(device_t dev);
107 static int pci_modevent(module_t mod, int what, void *arg);
108 static void pci_hdrtypedata(device_t pcib, int b, int s, int f,
110 static void pci_read_cap(device_t pcib, pcicfgregs *cfg);
111 static int pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg,
112 int reg, uint32_t *data);
114 static int pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg,
115 int reg, uint32_t data);
117 static void pci_read_vpd(device_t pcib, pcicfgregs *cfg);
118 static void pci_mask_msix(device_t dev, u_int index);
119 static void pci_unmask_msix(device_t dev, u_int index);
120 static int pci_msi_blacklisted(void);
121 static int pci_msix_blacklisted(void);
122 static void pci_resume_msi(device_t dev);
123 static void pci_resume_msix(device_t dev);
124 static int pci_remap_intr_method(device_t bus, device_t dev,
126 static void pci_hint_device_unit(device_t acdev, device_t child,
127 const char *name, int *unitp);
128 static int pci_reset_post(device_t dev, device_t child);
129 static int pci_reset_prepare(device_t dev, device_t child);
130 static int pci_reset_child(device_t dev, device_t child,
133 static int pci_get_id_method(device_t dev, device_t child,
134 enum pci_id_type type, uintptr_t *rid);
136 static struct pci_devinfo * pci_fill_devinfo(device_t pcib, device_t bus, int d,
137 int b, int s, int f, uint16_t vid, uint16_t did);
139 static device_method_t pci_methods[] = {
140 /* Device interface */
141 DEVMETHOD(device_probe, pci_probe),
142 DEVMETHOD(device_attach, pci_attach),
143 DEVMETHOD(device_detach, pci_detach),
144 DEVMETHOD(device_shutdown, bus_generic_shutdown),
145 DEVMETHOD(device_suspend, bus_generic_suspend),
146 DEVMETHOD(device_resume, pci_resume),
149 DEVMETHOD(bus_print_child, pci_print_child),
150 DEVMETHOD(bus_probe_nomatch, pci_probe_nomatch),
151 DEVMETHOD(bus_read_ivar, pci_read_ivar),
152 DEVMETHOD(bus_write_ivar, pci_write_ivar),
153 DEVMETHOD(bus_driver_added, pci_driver_added),
154 DEVMETHOD(bus_setup_intr, pci_setup_intr),
155 DEVMETHOD(bus_teardown_intr, pci_teardown_intr),
156 DEVMETHOD(bus_reset_prepare, pci_reset_prepare),
157 DEVMETHOD(bus_reset_post, pci_reset_post),
158 DEVMETHOD(bus_reset_child, pci_reset_child),
160 DEVMETHOD(bus_get_dma_tag, pci_get_dma_tag),
161 DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
162 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
163 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
164 DEVMETHOD(bus_delete_resource, pci_delete_resource),
165 DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
166 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
167 DEVMETHOD(bus_release_resource, pci_release_resource),
168 DEVMETHOD(bus_activate_resource, pci_activate_resource),
169 DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource),
170 DEVMETHOD(bus_child_deleted, pci_child_deleted),
171 DEVMETHOD(bus_child_detached, pci_child_detached),
172 DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
173 DEVMETHOD(bus_child_location_str, pci_child_location_str_method),
174 DEVMETHOD(bus_hint_device_unit, pci_hint_device_unit),
175 DEVMETHOD(bus_remap_intr, pci_remap_intr_method),
176 DEVMETHOD(bus_suspend_child, pci_suspend_child),
177 DEVMETHOD(bus_resume_child, pci_resume_child),
178 DEVMETHOD(bus_rescan, pci_rescan_method),
181 DEVMETHOD(pci_read_config, pci_read_config_method),
182 DEVMETHOD(pci_write_config, pci_write_config_method),
183 DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
184 DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
185 DEVMETHOD(pci_enable_io, pci_enable_io_method),
186 DEVMETHOD(pci_disable_io, pci_disable_io_method),
187 DEVMETHOD(pci_get_vpd_ident, pci_get_vpd_ident_method),
188 DEVMETHOD(pci_get_vpd_readonly, pci_get_vpd_readonly_method),
189 DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
190 DEVMETHOD(pci_set_powerstate, pci_set_powerstate_method),
191 DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
192 DEVMETHOD(pci_find_cap, pci_find_cap_method),
193 DEVMETHOD(pci_find_next_cap, pci_find_next_cap_method),
194 DEVMETHOD(pci_find_extcap, pci_find_extcap_method),
195 DEVMETHOD(pci_find_next_extcap, pci_find_next_extcap_method),
196 DEVMETHOD(pci_find_htcap, pci_find_htcap_method),
197 DEVMETHOD(pci_find_next_htcap, pci_find_next_htcap_method),
198 DEVMETHOD(pci_alloc_msi, pci_alloc_msi_method),
199 DEVMETHOD(pci_alloc_msix, pci_alloc_msix_method),
200 DEVMETHOD(pci_enable_msi, pci_enable_msi_method),
201 DEVMETHOD(pci_enable_msix, pci_enable_msix_method),
202 DEVMETHOD(pci_disable_msi, pci_disable_msi_method),
203 DEVMETHOD(pci_remap_msix, pci_remap_msix_method),
204 DEVMETHOD(pci_release_msi, pci_release_msi_method),
205 DEVMETHOD(pci_msi_count, pci_msi_count_method),
206 DEVMETHOD(pci_msix_count, pci_msix_count_method),
207 DEVMETHOD(pci_msix_pba_bar, pci_msix_pba_bar_method),
208 DEVMETHOD(pci_msix_table_bar, pci_msix_table_bar_method),
209 DEVMETHOD(pci_get_id, pci_get_id_method),
210 DEVMETHOD(pci_alloc_devinfo, pci_alloc_devinfo_method),
211 DEVMETHOD(pci_child_added, pci_child_added_method),
213 DEVMETHOD(pci_iov_attach, pci_iov_attach_method),
214 DEVMETHOD(pci_iov_detach, pci_iov_detach_method),
215 DEVMETHOD(pci_create_iov_child, pci_create_iov_child_method),
221 DEFINE_CLASS_0(pci, pci_driver, pci_methods, sizeof(struct pci_softc));
223 static devclass_t pci_devclass;
224 EARLY_DRIVER_MODULE(pci, pcib, pci_driver, pci_devclass, pci_modevent, NULL,
226 MODULE_VERSION(pci, 1);
228 static char *pci_vendordata;
229 static size_t pci_vendordata_size;
232 uint32_t devid; /* Vendor/device of the card */
234 #define PCI_QUIRK_MAP_REG 1 /* PCI map register in weird place */
235 #define PCI_QUIRK_DISABLE_MSI 2 /* Neither MSI nor MSI-X work */
236 #define PCI_QUIRK_ENABLE_MSI_VM 3 /* Older chipset in VM where MSI works */
237 #define PCI_QUIRK_UNMAP_REG 4 /* Ignore PCI map register */
238 #define PCI_QUIRK_DISABLE_MSIX 5 /* MSI-X doesn't work */
239 #define PCI_QUIRK_MSI_INTX_BUG 6 /* PCIM_CMD_INTxDIS disables MSI */
240 #define PCI_QUIRK_REALLOC_BAR 7 /* Can't allocate memory at the default address */
245 static const struct pci_quirk pci_quirks[] = {
246 /* The Intel 82371AB and 82443MX have a map register at offset 0x90. */
247 { 0x71138086, PCI_QUIRK_MAP_REG, 0x90, 0 },
248 { 0x719b8086, PCI_QUIRK_MAP_REG, 0x90, 0 },
249 /* As does the Serverworks OSB4 (the SMBus mapping register) */
250 { 0x02001166, PCI_QUIRK_MAP_REG, 0x90, 0 },
253 * MSI doesn't work with the ServerWorks CNB20-HE Host Bridge
254 * or the CMIC-SL (AKA ServerWorks GC_LE).
256 { 0x00141166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
257 { 0x00171166, PCI_QUIRK_DISABLE_MSI, 0, 0 },
260 * MSI doesn't work on earlier Intel chipsets including
261 * E7500, E7501, E7505, 845, 865, 875/E7210, and 855.
263 { 0x25408086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
264 { 0x254c8086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
265 { 0x25508086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
266 { 0x25608086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
267 { 0x25708086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
268 { 0x25788086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
269 { 0x35808086, PCI_QUIRK_DISABLE_MSI, 0, 0 },
272 * MSI doesn't work with devices behind the AMD 8131 HT-PCIX
275 { 0x74501022, PCI_QUIRK_DISABLE_MSI, 0, 0 },
278 * Some virtualization environments emulate an older chipset
279 * but support MSI just fine. QEMU uses the Intel 82440.
281 { 0x12378086, PCI_QUIRK_ENABLE_MSI_VM, 0, 0 },
284 * HPET MMIO base address may appear in Bar1 for AMD SB600 SMBus
285 * controller depending on SoftPciRst register (PM_IO 0x55 [7]).
286 * It prevents us from attaching hpet(4) when the bit is unset.
287 * Note this quirk only affects SB600 revision A13 and earlier.
288 * For SB600 A21 and later, firmware must set the bit to hide it.
289 * For SB700 and later, it is unused and hardcoded to zero.
291 { 0x43851002, PCI_QUIRK_UNMAP_REG, 0x14, 0 },
294 * Atheros AR8161/AR8162/E2200/E2400/E2500 Ethernet controllers have
295 * a bug that MSI interrupt does not assert if PCIM_CMD_INTxDIS bit
296 * of the command register is set.
298 { 0x10911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
299 { 0xE0911969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
300 { 0xE0A11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
301 { 0xE0B11969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
302 { 0x10901969, PCI_QUIRK_MSI_INTX_BUG, 0, 0 },
305 * Broadcom BCM5714(S)/BCM5715(S)/BCM5780(S) Ethernet MACs don't
306 * issue MSI interrupts with PCIM_CMD_INTxDIS set either.
308 { 0x166814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714 */
309 { 0x166914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5714S */
310 { 0x166a14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780 */
311 { 0x166b14e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5780S */
312 { 0x167814e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715 */
313 { 0x167914e4, PCI_QUIRK_MSI_INTX_BUG, 0, 0 }, /* BCM5715S */
316 * HPE Gen 10 VGA has a memory range that can't be allocated in the
319 { 0x98741002, PCI_QUIRK_REALLOC_BAR, 0, 0 },
324 /* map register information */
325 #define PCI_MAPMEM 0x01 /* memory map */
326 #define PCI_MAPMEMP 0x02 /* prefetchable memory map */
327 #define PCI_MAPPORT 0x04 /* port map */
329 struct devlist pci_devq;
330 uint32_t pci_generation;
331 uint32_t pci_numdevs = 0;
332 static int pcie_chipset, pcix_chipset;
335 SYSCTL_NODE(_hw, OID_AUTO, pci, CTLFLAG_RD, 0, "PCI bus tuning parameters");
337 static int pci_enable_io_modes = 1;
338 SYSCTL_INT(_hw_pci, OID_AUTO, enable_io_modes, CTLFLAG_RWTUN,
339 &pci_enable_io_modes, 1,
340 "Enable I/O and memory bits in the config register. Some BIOSes do not"
341 " enable these bits correctly. We'd like to do this all the time, but"
342 " there are some peripherals that this causes problems with.");
344 static int pci_do_realloc_bars = 1;
345 SYSCTL_INT(_hw_pci, OID_AUTO, realloc_bars, CTLFLAG_RWTUN,
346 &pci_do_realloc_bars, 0,
347 "Attempt to allocate a new range for any BARs whose original "
348 "firmware-assigned ranges fail to allocate during the initial device scan.");
350 static int pci_do_power_nodriver = 0;
351 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_nodriver, CTLFLAG_RWTUN,
352 &pci_do_power_nodriver, 0,
353 "Place a function into D3 state when no driver attaches to it. 0 means"
354 " disable. 1 means conservatively place devices into D3 state. 2 means"
355 " aggressively place devices into D3 state. 3 means put absolutely"
356 " everything in D3 state.");
358 int pci_do_power_resume = 1;
359 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_resume, CTLFLAG_RWTUN,
360 &pci_do_power_resume, 1,
361 "Transition from D3 -> D0 on resume.");
363 int pci_do_power_suspend = 1;
364 SYSCTL_INT(_hw_pci, OID_AUTO, do_power_suspend, CTLFLAG_RWTUN,
365 &pci_do_power_suspend, 1,
366 "Transition from D0 -> D3 on suspend.");
368 static int pci_do_msi = 1;
369 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msi, CTLFLAG_RWTUN, &pci_do_msi, 1,
370 "Enable support for MSI interrupts");
372 static int pci_do_msix = 1;
373 SYSCTL_INT(_hw_pci, OID_AUTO, enable_msix, CTLFLAG_RWTUN, &pci_do_msix, 1,
374 "Enable support for MSI-X interrupts");
376 static int pci_msix_rewrite_table = 0;
377 SYSCTL_INT(_hw_pci, OID_AUTO, msix_rewrite_table, CTLFLAG_RWTUN,
378 &pci_msix_rewrite_table, 0,
379 "Rewrite entire MSI-X table when updating MSI-X entries");
381 static int pci_honor_msi_blacklist = 1;
382 SYSCTL_INT(_hw_pci, OID_AUTO, honor_msi_blacklist, CTLFLAG_RDTUN,
383 &pci_honor_msi_blacklist, 1, "Honor chipset blacklist for MSI/MSI-X");
385 #if defined(__i386__) || defined(__amd64__)
386 static int pci_usb_takeover = 1;
388 static int pci_usb_takeover = 0;
390 SYSCTL_INT(_hw_pci, OID_AUTO, usb_early_takeover, CTLFLAG_RDTUN,
391 &pci_usb_takeover, 1,
392 "Enable early takeover of USB controllers. Disable this if you depend on"
393 " BIOS emulation of USB devices, that is you use USB devices (like"
394 " keyboard or mouse) but do not load USB drivers");
396 static int pci_clear_bars;
397 SYSCTL_INT(_hw_pci, OID_AUTO, clear_bars, CTLFLAG_RDTUN, &pci_clear_bars, 0,
398 "Ignore firmware-assigned resources for BARs.");
400 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
401 static int pci_clear_buses;
402 SYSCTL_INT(_hw_pci, OID_AUTO, clear_buses, CTLFLAG_RDTUN, &pci_clear_buses, 0,
403 "Ignore firmware-assigned bus numbers.");
406 static int pci_enable_ari = 1;
407 SYSCTL_INT(_hw_pci, OID_AUTO, enable_ari, CTLFLAG_RDTUN, &pci_enable_ari,
408 0, "Enable support for PCIe Alternative RID Interpretation");
410 static int pci_clear_aer_on_attach = 0;
411 SYSCTL_INT(_hw_pci, OID_AUTO, clear_aer_on_attach, CTLFLAG_RWTUN,
412 &pci_clear_aer_on_attach, 0,
413 "Clear port and device AER state on driver attach");
416 pci_has_quirk(uint32_t devid, int quirk)
418 const struct pci_quirk *q;
420 for (q = &pci_quirks[0]; q->devid; q++) {
421 if (q->devid == devid && q->type == quirk)
427 /* Find a device_t by bus/slot/function in domain 0 */
430 pci_find_bsf(uint8_t bus, uint8_t slot, uint8_t func)
433 return (pci_find_dbsf(0, bus, slot, func));
436 /* Find a device_t by domain/bus/slot/function */
439 pci_find_dbsf(uint32_t domain, uint8_t bus, uint8_t slot, uint8_t func)
441 struct pci_devinfo *dinfo = NULL;
443 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
444 if ((dinfo->cfg.domain == domain) &&
445 (dinfo->cfg.bus == bus) &&
446 (dinfo->cfg.slot == slot) &&
447 (dinfo->cfg.func == func)) {
452 return (dinfo != NULL ? dinfo->cfg.dev : NULL);
455 /* Find a device_t by vendor/device ID */
458 pci_find_device(uint16_t vendor, uint16_t device)
460 struct pci_devinfo *dinfo;
462 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
463 if ((dinfo->cfg.vendor == vendor) &&
464 (dinfo->cfg.device == device)) {
465 return (dinfo->cfg.dev);
473 pci_find_class(uint8_t class, uint8_t subclass)
475 struct pci_devinfo *dinfo;
477 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
478 if (dinfo->cfg.baseclass == class &&
479 dinfo->cfg.subclass == subclass) {
480 return (dinfo->cfg.dev);
488 pci_printf(pcicfgregs *cfg, const char *fmt, ...)
493 retval = printf("pci%d:%d:%d:%d: ", cfg->domain, cfg->bus, cfg->slot,
496 retval += vprintf(fmt, ap);
501 /* return base address of memory or port map */
504 pci_mapbase(uint64_t mapreg)
507 if (PCI_BAR_MEM(mapreg))
508 return (mapreg & PCIM_BAR_MEM_BASE);
510 return (mapreg & PCIM_BAR_IO_BASE);
513 /* return map type of memory or port map */
516 pci_maptype(uint64_t mapreg)
519 if (PCI_BAR_IO(mapreg))
521 if (mapreg & PCIM_BAR_MEM_PREFETCH)
522 return ("Prefetchable Memory");
526 /* return log2 of map size decoded for memory or port map */
529 pci_mapsize(uint64_t testval)
533 testval = pci_mapbase(testval);
536 while ((testval & 1) == 0)
545 /* return base address of device ROM */
548 pci_rombase(uint64_t mapreg)
551 return (mapreg & PCIM_BIOS_ADDR_MASK);
554 /* return log2 of map size decided for device ROM */
557 pci_romsize(uint64_t testval)
561 testval = pci_rombase(testval);
564 while ((testval & 1) == 0)
573 /* return log2 of address range supported by map register */
576 pci_maprange(uint64_t mapreg)
580 if (PCI_BAR_IO(mapreg))
583 switch (mapreg & PCIM_BAR_MEM_TYPE) {
584 case PCIM_BAR_MEM_32:
587 case PCIM_BAR_MEM_1MB:
590 case PCIM_BAR_MEM_64:
597 /* adjust some values from PCI 1.0 devices to match 2.0 standards ... */
600 pci_fixancient(pcicfgregs *cfg)
602 if ((cfg->hdrtype & PCIM_HDRTYPE) != PCIM_HDRTYPE_NORMAL)
605 /* PCI to PCI bridges use header type 1 */
606 if (cfg->baseclass == PCIC_BRIDGE && cfg->subclass == PCIS_BRIDGE_PCI)
607 cfg->hdrtype = PCIM_HDRTYPE_BRIDGE;
610 /* extract header type specific config data */
613 pci_hdrtypedata(device_t pcib, int b, int s, int f, pcicfgregs *cfg)
615 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
616 switch (cfg->hdrtype & PCIM_HDRTYPE) {
617 case PCIM_HDRTYPE_NORMAL:
618 cfg->subvendor = REG(PCIR_SUBVEND_0, 2);
619 cfg->subdevice = REG(PCIR_SUBDEV_0, 2);
620 cfg->mingnt = REG(PCIR_MINGNT, 1);
621 cfg->maxlat = REG(PCIR_MAXLAT, 1);
622 cfg->nummaps = PCI_MAXMAPS_0;
624 case PCIM_HDRTYPE_BRIDGE:
625 cfg->bridge.br_seclat = REG(PCIR_SECLAT_1, 1);
626 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_1, 1);
627 cfg->bridge.br_secbus = REG(PCIR_SECBUS_1, 1);
628 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_1, 1);
629 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_1, 2);
630 cfg->nummaps = PCI_MAXMAPS_1;
632 case PCIM_HDRTYPE_CARDBUS:
633 cfg->bridge.br_seclat = REG(PCIR_SECLAT_2, 1);
634 cfg->bridge.br_subbus = REG(PCIR_SUBBUS_2, 1);
635 cfg->bridge.br_secbus = REG(PCIR_SECBUS_2, 1);
636 cfg->bridge.br_pribus = REG(PCIR_PRIBUS_2, 1);
637 cfg->bridge.br_control = REG(PCIR_BRIDGECTL_2, 2);
638 cfg->subvendor = REG(PCIR_SUBVEND_2, 2);
639 cfg->subdevice = REG(PCIR_SUBDEV_2, 2);
640 cfg->nummaps = PCI_MAXMAPS_2;
646 /* read configuration header into pcicfgregs structure */
648 pci_read_device(device_t pcib, device_t bus, int d, int b, int s, int f)
650 #define REG(n, w) PCIB_READ_CONFIG(pcib, b, s, f, n, w)
653 vid = REG(PCIR_VENDOR, 2);
654 did = REG(PCIR_DEVICE, 2);
656 return (pci_fill_devinfo(pcib, bus, d, b, s, f, vid, did));
662 pci_alloc_devinfo_method(device_t dev)
665 return (malloc(sizeof(struct pci_devinfo), M_DEVBUF,
669 static struct pci_devinfo *
670 pci_fill_devinfo(device_t pcib, device_t bus, int d, int b, int s, int f,
671 uint16_t vid, uint16_t did)
673 struct pci_devinfo *devlist_entry;
676 devlist_entry = PCI_ALLOC_DEVINFO(bus);
678 cfg = &devlist_entry->cfg;
686 cfg->cmdreg = REG(PCIR_COMMAND, 2);
687 cfg->statreg = REG(PCIR_STATUS, 2);
688 cfg->baseclass = REG(PCIR_CLASS, 1);
689 cfg->subclass = REG(PCIR_SUBCLASS, 1);
690 cfg->progif = REG(PCIR_PROGIF, 1);
691 cfg->revid = REG(PCIR_REVID, 1);
692 cfg->hdrtype = REG(PCIR_HDRTYPE, 1);
693 cfg->cachelnsz = REG(PCIR_CACHELNSZ, 1);
694 cfg->lattimer = REG(PCIR_LATTIMER, 1);
695 cfg->intpin = REG(PCIR_INTPIN, 1);
696 cfg->intline = REG(PCIR_INTLINE, 1);
698 cfg->mfdev = (cfg->hdrtype & PCIM_MFDEV) != 0;
699 cfg->hdrtype &= ~PCIM_MFDEV;
700 STAILQ_INIT(&cfg->maps);
705 pci_hdrtypedata(pcib, b, s, f, cfg);
707 if (REG(PCIR_STATUS, 2) & PCIM_STATUS_CAPPRESENT)
708 pci_read_cap(pcib, cfg);
710 STAILQ_INSERT_TAIL(&pci_devq, devlist_entry, pci_links);
712 devlist_entry->conf.pc_sel.pc_domain = cfg->domain;
713 devlist_entry->conf.pc_sel.pc_bus = cfg->bus;
714 devlist_entry->conf.pc_sel.pc_dev = cfg->slot;
715 devlist_entry->conf.pc_sel.pc_func = cfg->func;
716 devlist_entry->conf.pc_hdr = cfg->hdrtype;
718 devlist_entry->conf.pc_subvendor = cfg->subvendor;
719 devlist_entry->conf.pc_subdevice = cfg->subdevice;
720 devlist_entry->conf.pc_vendor = cfg->vendor;
721 devlist_entry->conf.pc_device = cfg->device;
723 devlist_entry->conf.pc_class = cfg->baseclass;
724 devlist_entry->conf.pc_subclass = cfg->subclass;
725 devlist_entry->conf.pc_progif = cfg->progif;
726 devlist_entry->conf.pc_revid = cfg->revid;
731 return (devlist_entry);
736 pci_ea_fill_info(device_t pcib, pcicfgregs *cfg)
738 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, \
739 cfg->ea.ea_location + (n), w)
746 uint64_t base, max_offset;
747 struct pci_ea_entry *eae;
749 if (cfg->ea.ea_location == 0)
752 STAILQ_INIT(&cfg->ea.ea_entries);
754 /* Determine the number of entries */
755 num_ent = REG(PCIR_EA_NUM_ENT, 2);
756 num_ent &= PCIM_EA_NUM_ENT_MASK;
758 /* Find the first entry to care of */
759 ptr = PCIR_EA_FIRST_ENT;
761 /* Skip DWORD 2 for type 1 functions */
762 if ((cfg->hdrtype & PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE)
765 for (a = 0; a < num_ent; a++) {
767 eae = malloc(sizeof(*eae), M_DEVBUF, M_WAITOK | M_ZERO);
768 eae->eae_cfg_offset = cfg->ea.ea_location + ptr;
770 /* Read a number of dwords in the entry */
773 ent_size = (val & PCIM_EA_ES);
775 for (b = 0; b < ent_size; b++) {
780 eae->eae_flags = val;
781 eae->eae_bei = (PCIM_EA_BEI & val) >> PCIM_EA_BEI_OFFSET;
783 base = dw[0] & PCIM_EA_FIELD_MASK;
784 max_offset = dw[1] | ~PCIM_EA_FIELD_MASK;
786 if (((dw[0] & PCIM_EA_IS_64) != 0) && (b < ent_size)) {
787 base |= (uint64_t)dw[b] << 32UL;
790 if (((dw[1] & PCIM_EA_IS_64) != 0)
792 max_offset |= (uint64_t)dw[b] << 32UL;
796 eae->eae_base = base;
797 eae->eae_max_offset = max_offset;
799 STAILQ_INSERT_TAIL(&cfg->ea.ea_entries, eae, eae_link);
802 printf("PCI(EA) dev %04x:%04x, bei %d, flags #%x, base #%jx, max_offset #%jx\n",
803 cfg->vendor, cfg->device, eae->eae_bei, eae->eae_flags,
804 (uintmax_t)eae->eae_base, (uintmax_t)eae->eae_max_offset);
811 pci_read_cap(device_t pcib, pcicfgregs *cfg)
813 #define REG(n, w) PCIB_READ_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, w)
814 #define WREG(n, v, w) PCIB_WRITE_CONFIG(pcib, cfg->bus, cfg->slot, cfg->func, n, v, w)
815 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
819 int ptr, nextptr, ptrptr;
821 switch (cfg->hdrtype & PCIM_HDRTYPE) {
822 case PCIM_HDRTYPE_NORMAL:
823 case PCIM_HDRTYPE_BRIDGE:
824 ptrptr = PCIR_CAP_PTR;
826 case PCIM_HDRTYPE_CARDBUS:
827 ptrptr = PCIR_CAP_PTR_2; /* cardbus capabilities ptr */
830 return; /* no extended capabilities support */
832 nextptr = REG(ptrptr, 1); /* sanity check? */
835 * Read capability entries.
837 while (nextptr != 0) {
840 printf("illegal PCI extended capability offset %d\n",
844 /* Find the next entry */
846 nextptr = REG(ptr + PCICAP_NEXTPTR, 1);
848 /* Process this entry */
849 switch (REG(ptr + PCICAP_ID, 1)) {
850 case PCIY_PMG: /* PCI power management */
851 if (cfg->pp.pp_cap == 0) {
852 cfg->pp.pp_cap = REG(ptr + PCIR_POWER_CAP, 2);
853 cfg->pp.pp_status = ptr + PCIR_POWER_STATUS;
854 cfg->pp.pp_bse = ptr + PCIR_POWER_BSE;
855 if ((nextptr - ptr) > PCIR_POWER_DATA)
856 cfg->pp.pp_data = ptr + PCIR_POWER_DATA;
859 case PCIY_HT: /* HyperTransport */
860 /* Determine HT-specific capability type. */
861 val = REG(ptr + PCIR_HT_COMMAND, 2);
863 if ((val & 0xe000) == PCIM_HTCAP_SLAVE)
864 cfg->ht.ht_slave = ptr;
866 #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__)
867 switch (val & PCIM_HTCMD_CAP_MASK) {
868 case PCIM_HTCAP_MSI_MAPPING:
869 if (!(val & PCIM_HTCMD_MSI_FIXED)) {
870 /* Sanity check the mapping window. */
871 addr = REG(ptr + PCIR_HTMSI_ADDRESS_HI,
874 addr |= REG(ptr + PCIR_HTMSI_ADDRESS_LO,
876 if (addr != MSI_INTEL_ADDR_BASE)
878 "HT device at pci%d:%d:%d:%d has non-default MSI window 0x%llx\n",
879 cfg->domain, cfg->bus,
880 cfg->slot, cfg->func,
883 addr = MSI_INTEL_ADDR_BASE;
885 cfg->ht.ht_msimap = ptr;
886 cfg->ht.ht_msictrl = val;
887 cfg->ht.ht_msiaddr = addr;
892 case PCIY_MSI: /* PCI MSI */
893 cfg->msi.msi_location = ptr;
894 cfg->msi.msi_ctrl = REG(ptr + PCIR_MSI_CTRL, 2);
895 cfg->msi.msi_msgnum = 1 << ((cfg->msi.msi_ctrl &
896 PCIM_MSICTRL_MMC_MASK)>>1);
898 case PCIY_MSIX: /* PCI MSI-X */
899 cfg->msix.msix_location = ptr;
900 cfg->msix.msix_ctrl = REG(ptr + PCIR_MSIX_CTRL, 2);
901 cfg->msix.msix_msgnum = (cfg->msix.msix_ctrl &
902 PCIM_MSIXCTRL_TABLE_SIZE) + 1;
903 val = REG(ptr + PCIR_MSIX_TABLE, 4);
904 cfg->msix.msix_table_bar = PCIR_BAR(val &
906 cfg->msix.msix_table_offset = val & ~PCIM_MSIX_BIR_MASK;
907 val = REG(ptr + PCIR_MSIX_PBA, 4);
908 cfg->msix.msix_pba_bar = PCIR_BAR(val &
910 cfg->msix.msix_pba_offset = val & ~PCIM_MSIX_BIR_MASK;
912 case PCIY_VPD: /* PCI Vital Product Data */
913 cfg->vpd.vpd_reg = ptr;
916 /* Should always be true. */
917 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
918 PCIM_HDRTYPE_BRIDGE) {
919 val = REG(ptr + PCIR_SUBVENDCAP_ID, 4);
920 cfg->subvendor = val & 0xffff;
921 cfg->subdevice = val >> 16;
924 case PCIY_PCIX: /* PCI-X */
926 * Assume we have a PCI-X chipset if we have
927 * at least one PCI-PCI bridge with a PCI-X
928 * capability. Note that some systems with
929 * PCI-express or HT chipsets might match on
930 * this check as well.
932 if ((cfg->hdrtype & PCIM_HDRTYPE) ==
935 cfg->pcix.pcix_location = ptr;
937 case PCIY_EXPRESS: /* PCI-express */
939 * Assume we have a PCI-express chipset if we have
940 * at least one PCI-express device.
943 cfg->pcie.pcie_location = ptr;
944 val = REG(ptr + PCIER_FLAGS, 2);
945 cfg->pcie.pcie_type = val & PCIEM_FLAGS_TYPE;
947 case PCIY_EA: /* Enhanced Allocation */
948 cfg->ea.ea_location = ptr;
949 pci_ea_fill_info(pcib, cfg);
956 #if defined(__powerpc__)
958 * Enable the MSI mapping window for all HyperTransport
959 * slaves. PCI-PCI bridges have their windows enabled via
962 if (cfg->ht.ht_slave != 0 && cfg->ht.ht_msimap != 0 &&
963 !(cfg->ht.ht_msictrl & PCIM_HTCMD_MSI_ENABLE)) {
965 "Enabling MSI window for HyperTransport slave at pci%d:%d:%d:%d\n",
966 cfg->domain, cfg->bus, cfg->slot, cfg->func);
967 cfg->ht.ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
968 WREG(cfg->ht.ht_msimap + PCIR_HT_COMMAND, cfg->ht.ht_msictrl,
972 /* REG and WREG use carry through to next functions */
976 * PCI Vital Product Data
979 #define PCI_VPD_TIMEOUT 1000000
982 pci_read_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t *data)
984 int count = PCI_VPD_TIMEOUT;
986 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
988 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg, 2);
990 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) != 0x8000) {
993 DELAY(1); /* limit looping */
995 *data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4));
1002 pci_write_vpd_reg(device_t pcib, pcicfgregs *cfg, int reg, uint32_t data)
1004 int count = PCI_VPD_TIMEOUT;
1006 KASSERT((reg & 3) == 0, ("VPD register must by 4 byte aligned"));
1008 WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4);
1009 WREG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, reg | 0x8000, 2);
1010 while ((REG(cfg->vpd.vpd_reg + PCIR_VPD_ADDR, 2) & 0x8000) == 0x8000) {
1013 DELAY(1); /* limit looping */
1020 #undef PCI_VPD_TIMEOUT
1022 struct vpd_readstate {
1032 vpd_nextbyte(struct vpd_readstate *vrs, uint8_t *data)
1037 if (vrs->bytesinval == 0) {
1038 if (pci_read_vpd_reg(vrs->pcib, vrs->cfg, vrs->off, ®))
1040 vrs->val = le32toh(reg);
1042 byte = vrs->val & 0xff;
1043 vrs->bytesinval = 3;
1045 vrs->val = vrs->val >> 8;
1046 byte = vrs->val & 0xff;
1056 pci_read_vpd(device_t pcib, pcicfgregs *cfg)
1058 struct vpd_readstate vrs;
1063 int alloc, off; /* alloc/off for RO/W arrays */
1069 /* init vpd reader */
1077 name = remain = i = 0; /* shut up stupid gcc */
1078 alloc = off = 0; /* shut up stupid gcc */
1079 dflen = 0; /* shut up stupid gcc */
1081 while (state >= 0) {
1082 if (vpd_nextbyte(&vrs, &byte)) {
1087 printf("vpd: val: %#x, off: %d, bytesinval: %d, byte: %#hhx, " \
1088 "state: %d, remain: %d, name: %#x, i: %d\n", vrs.val,
1089 vrs.off, vrs.bytesinval, byte, state, remain, name, i);
1092 case 0: /* item name */
1094 if (vpd_nextbyte(&vrs, &byte2)) {
1099 if (vpd_nextbyte(&vrs, &byte2)) {
1103 remain |= byte2 << 8;
1104 if (remain > (0x7f*4 - vrs.off)) {
1107 "invalid VPD data, remain %#x\n",
1112 remain = byte & 0x7;
1113 name = (byte >> 3) & 0xf;
1116 case 0x2: /* String */
1117 cfg->vpd.vpd_ident = malloc(remain + 1,
1118 M_DEVBUF, M_WAITOK);
1125 case 0x10: /* VPD-R */
1128 cfg->vpd.vpd_ros = malloc(alloc *
1129 sizeof(*cfg->vpd.vpd_ros), M_DEVBUF,
1133 case 0x11: /* VPD-W */
1136 cfg->vpd.vpd_w = malloc(alloc *
1137 sizeof(*cfg->vpd.vpd_w), M_DEVBUF,
1141 default: /* Invalid data, abort */
1147 case 1: /* Identifier String */
1148 cfg->vpd.vpd_ident[i++] = byte;
1151 cfg->vpd.vpd_ident[i] = '\0';
1156 case 2: /* VPD-R Keyword Header */
1158 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1159 (alloc *= 2) * sizeof(*cfg->vpd.vpd_ros),
1160 M_DEVBUF, M_WAITOK | M_ZERO);
1162 cfg->vpd.vpd_ros[off].keyword[0] = byte;
1163 if (vpd_nextbyte(&vrs, &byte2)) {
1167 cfg->vpd.vpd_ros[off].keyword[1] = byte2;
1168 if (vpd_nextbyte(&vrs, &byte2)) {
1172 cfg->vpd.vpd_ros[off].len = dflen = byte2;
1174 strncmp(cfg->vpd.vpd_ros[off].keyword, "RV",
1177 * if this happens, we can't trust the rest
1180 pci_printf(cfg, "bad keyword length: %d\n",
1185 } else if (dflen == 0) {
1186 cfg->vpd.vpd_ros[off].value = malloc(1 *
1187 sizeof(*cfg->vpd.vpd_ros[off].value),
1188 M_DEVBUF, M_WAITOK);
1189 cfg->vpd.vpd_ros[off].value[0] = '\x00';
1191 cfg->vpd.vpd_ros[off].value = malloc(
1193 sizeof(*cfg->vpd.vpd_ros[off].value),
1194 M_DEVBUF, M_WAITOK);
1197 /* keep in sync w/ state 3's transistions */
1198 if (dflen == 0 && remain == 0)
1200 else if (dflen == 0)
1206 case 3: /* VPD-R Keyword Value */
1207 cfg->vpd.vpd_ros[off].value[i++] = byte;
1208 if (strncmp(cfg->vpd.vpd_ros[off].keyword,
1209 "RV", 2) == 0 && cksumvalid == -1) {
1215 "bad VPD cksum, remain %hhu\n",
1224 /* keep in sync w/ state 2's transistions */
1226 cfg->vpd.vpd_ros[off++].value[i++] = '\0';
1227 if (dflen == 0 && remain == 0) {
1228 cfg->vpd.vpd_rocnt = off;
1229 cfg->vpd.vpd_ros = reallocf(cfg->vpd.vpd_ros,
1230 off * sizeof(*cfg->vpd.vpd_ros),
1231 M_DEVBUF, M_WAITOK | M_ZERO);
1233 } else if (dflen == 0)
1243 case 5: /* VPD-W Keyword Header */
1245 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1246 (alloc *= 2) * sizeof(*cfg->vpd.vpd_w),
1247 M_DEVBUF, M_WAITOK | M_ZERO);
1249 cfg->vpd.vpd_w[off].keyword[0] = byte;
1250 if (vpd_nextbyte(&vrs, &byte2)) {
1254 cfg->vpd.vpd_w[off].keyword[1] = byte2;
1255 if (vpd_nextbyte(&vrs, &byte2)) {
1259 cfg->vpd.vpd_w[off].len = dflen = byte2;
1260 cfg->vpd.vpd_w[off].start = vrs.off - vrs.bytesinval;
1261 cfg->vpd.vpd_w[off].value = malloc((dflen + 1) *
1262 sizeof(*cfg->vpd.vpd_w[off].value),
1263 M_DEVBUF, M_WAITOK);
1266 /* keep in sync w/ state 6's transistions */
1267 if (dflen == 0 && remain == 0)
1269 else if (dflen == 0)
1275 case 6: /* VPD-W Keyword Value */
1276 cfg->vpd.vpd_w[off].value[i++] = byte;
1279 /* keep in sync w/ state 5's transistions */
1281 cfg->vpd.vpd_w[off++].value[i++] = '\0';
1282 if (dflen == 0 && remain == 0) {
1283 cfg->vpd.vpd_wcnt = off;
1284 cfg->vpd.vpd_w = reallocf(cfg->vpd.vpd_w,
1285 off * sizeof(*cfg->vpd.vpd_w),
1286 M_DEVBUF, M_WAITOK | M_ZERO);
1288 } else if (dflen == 0)
1293 pci_printf(cfg, "invalid state: %d\n", state);
1299 if (cksumvalid == 0 || state < -1) {
1300 /* read-only data bad, clean up */
1301 if (cfg->vpd.vpd_ros != NULL) {
1302 for (off = 0; cfg->vpd.vpd_ros[off].value; off++)
1303 free(cfg->vpd.vpd_ros[off].value, M_DEVBUF);
1304 free(cfg->vpd.vpd_ros, M_DEVBUF);
1305 cfg->vpd.vpd_ros = NULL;
1309 /* I/O error, clean up */
1310 pci_printf(cfg, "failed to read VPD data.\n");
1311 if (cfg->vpd.vpd_ident != NULL) {
1312 free(cfg->vpd.vpd_ident, M_DEVBUF);
1313 cfg->vpd.vpd_ident = NULL;
1315 if (cfg->vpd.vpd_w != NULL) {
1316 for (off = 0; cfg->vpd.vpd_w[off].value; off++)
1317 free(cfg->vpd.vpd_w[off].value, M_DEVBUF);
1318 free(cfg->vpd.vpd_w, M_DEVBUF);
1319 cfg->vpd.vpd_w = NULL;
1322 cfg->vpd.vpd_cached = 1;
1328 pci_get_vpd_ident_method(device_t dev, device_t child, const char **identptr)
1330 struct pci_devinfo *dinfo = device_get_ivars(child);
1331 pcicfgregs *cfg = &dinfo->cfg;
1333 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1334 pci_read_vpd(device_get_parent(dev), cfg);
1336 *identptr = cfg->vpd.vpd_ident;
1338 if (*identptr == NULL)
1345 pci_get_vpd_readonly_method(device_t dev, device_t child, const char *kw,
1348 struct pci_devinfo *dinfo = device_get_ivars(child);
1349 pcicfgregs *cfg = &dinfo->cfg;
1352 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1353 pci_read_vpd(device_get_parent(dev), cfg);
1355 for (i = 0; i < cfg->vpd.vpd_rocnt; i++)
1356 if (memcmp(kw, cfg->vpd.vpd_ros[i].keyword,
1357 sizeof(cfg->vpd.vpd_ros[i].keyword)) == 0) {
1358 *vptr = cfg->vpd.vpd_ros[i].value;
1367 pci_fetch_vpd_list(device_t dev)
1369 struct pci_devinfo *dinfo = device_get_ivars(dev);
1370 pcicfgregs *cfg = &dinfo->cfg;
1372 if (!cfg->vpd.vpd_cached && cfg->vpd.vpd_reg != 0)
1373 pci_read_vpd(device_get_parent(device_get_parent(dev)), cfg);
1378 * Find the requested HyperTransport capability and return the offset
1379 * in configuration space via the pointer provided. The function
1380 * returns 0 on success and an error code otherwise.
1383 pci_find_htcap_method(device_t dev, device_t child, int capability, int *capreg)
1388 error = pci_find_cap(child, PCIY_HT, &ptr);
1393 * Traverse the capabilities list checking each HT capability
1394 * to see if it matches the requested HT capability.
1397 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1398 if (capability == PCIM_HTCAP_SLAVE ||
1399 capability == PCIM_HTCAP_HOST)
1402 val &= PCIM_HTCMD_CAP_MASK;
1403 if (val == capability) {
1409 /* Skip to the next HT capability. */
1410 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1418 * Find the next requested HyperTransport capability after start and return
1419 * the offset in configuration space via the pointer provided. The function
1420 * returns 0 on success and an error code otherwise.
1423 pci_find_next_htcap_method(device_t dev, device_t child, int capability,
1424 int start, int *capreg)
1429 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == PCIY_HT,
1430 ("start capability is not HyperTransport capability"));
1434 * Traverse the capabilities list checking each HT capability
1435 * to see if it matches the requested HT capability.
1438 /* Skip to the next HT capability. */
1439 if (pci_find_next_cap(child, PCIY_HT, ptr, &ptr) != 0)
1442 val = pci_read_config(child, ptr + PCIR_HT_COMMAND, 2);
1443 if (capability == PCIM_HTCAP_SLAVE ||
1444 capability == PCIM_HTCAP_HOST)
1447 val &= PCIM_HTCMD_CAP_MASK;
1448 if (val == capability) {
1459 * Find the requested capability and return the offset in
1460 * configuration space via the pointer provided. The function returns
1461 * 0 on success and an error code otherwise.
1464 pci_find_cap_method(device_t dev, device_t child, int capability,
1467 struct pci_devinfo *dinfo = device_get_ivars(child);
1468 pcicfgregs *cfg = &dinfo->cfg;
1473 * Check the CAP_LIST bit of the PCI status register first.
1475 status = pci_read_config(child, PCIR_STATUS, 2);
1476 if (!(status & PCIM_STATUS_CAPPRESENT))
1480 * Determine the start pointer of the capabilities list.
1482 switch (cfg->hdrtype & PCIM_HDRTYPE) {
1483 case PCIM_HDRTYPE_NORMAL:
1484 case PCIM_HDRTYPE_BRIDGE:
1487 case PCIM_HDRTYPE_CARDBUS:
1488 ptr = PCIR_CAP_PTR_2;
1492 return (ENXIO); /* no extended capabilities support */
1494 ptr = pci_read_config(child, ptr, 1);
1497 * Traverse the capabilities list.
1500 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1505 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1512 * Find the next requested capability after start and return the offset in
1513 * configuration space via the pointer provided. The function returns
1514 * 0 on success and an error code otherwise.
1517 pci_find_next_cap_method(device_t dev, device_t child, int capability,
1518 int start, int *capreg)
1522 KASSERT(pci_read_config(child, start + PCICAP_ID, 1) == capability,
1523 ("start capability is not expected capability"));
1525 ptr = pci_read_config(child, start + PCICAP_NEXTPTR, 1);
1527 if (pci_read_config(child, ptr + PCICAP_ID, 1) == capability) {
1532 ptr = pci_read_config(child, ptr + PCICAP_NEXTPTR, 1);
1539 * Find the requested extended capability and return the offset in
1540 * configuration space via the pointer provided. The function returns
1541 * 0 on success and an error code otherwise.
1544 pci_find_extcap_method(device_t dev, device_t child, int capability,
1547 struct pci_devinfo *dinfo = device_get_ivars(child);
1548 pcicfgregs *cfg = &dinfo->cfg;
1552 /* Only supported for PCI-express devices. */
1553 if (cfg->pcie.pcie_location == 0)
1557 ecap = pci_read_config(child, ptr, 4);
1558 if (ecap == 0xffffffff || ecap == 0)
1561 if (PCI_EXTCAP_ID(ecap) == capability) {
1566 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1569 ecap = pci_read_config(child, ptr, 4);
1576 * Find the next requested extended capability after start and return the
1577 * offset in configuration space via the pointer provided. The function
1578 * returns 0 on success and an error code otherwise.
1581 pci_find_next_extcap_method(device_t dev, device_t child, int capability,
1582 int start, int *capreg)
1584 struct pci_devinfo *dinfo = device_get_ivars(child);
1585 pcicfgregs *cfg = &dinfo->cfg;
1589 /* Only supported for PCI-express devices. */
1590 if (cfg->pcie.pcie_location == 0)
1593 ecap = pci_read_config(child, start, 4);
1594 KASSERT(PCI_EXTCAP_ID(ecap) == capability,
1595 ("start extended capability is not expected capability"));
1596 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1598 ecap = pci_read_config(child, ptr, 4);
1599 if (PCI_EXTCAP_ID(ecap) == capability) {
1604 ptr = PCI_EXTCAP_NEXTPTR(ecap);
1611 * Support for MSI-X message interrupts.
1614 pci_write_msix_entry(device_t dev, u_int index, uint64_t address, uint32_t data)
1616 struct pci_devinfo *dinfo = device_get_ivars(dev);
1617 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1620 KASSERT(msix->msix_table_len > index, ("bogus index"));
1621 offset = msix->msix_table_offset + index * 16;
1622 bus_write_4(msix->msix_table_res, offset, address & 0xffffffff);
1623 bus_write_4(msix->msix_table_res, offset + 4, address >> 32);
1624 bus_write_4(msix->msix_table_res, offset + 8, data);
1628 pci_enable_msix_method(device_t dev, device_t child, u_int index,
1629 uint64_t address, uint32_t data)
1632 if (pci_msix_rewrite_table) {
1633 struct pci_devinfo *dinfo = device_get_ivars(child);
1634 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1637 * Some VM hosts require MSIX to be disabled in the
1638 * control register before updating the MSIX table
1639 * entries are allowed. It is not enough to only
1640 * disable MSIX while updating a single entry. MSIX
1641 * must be disabled while updating all entries in the
1644 pci_write_config(child,
1645 msix->msix_location + PCIR_MSIX_CTRL,
1646 msix->msix_ctrl & ~PCIM_MSIXCTRL_MSIX_ENABLE, 2);
1647 pci_resume_msix(child);
1649 pci_write_msix_entry(child, index, address, data);
1651 /* Enable MSI -> HT mapping. */
1652 pci_ht_map_msi(child, address);
1656 pci_mask_msix(device_t dev, u_int index)
1658 struct pci_devinfo *dinfo = device_get_ivars(dev);
1659 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1660 uint32_t offset, val;
1662 KASSERT(msix->msix_msgnum > index, ("bogus index"));
1663 offset = msix->msix_table_offset + index * 16 + 12;
1664 val = bus_read_4(msix->msix_table_res, offset);
1665 val |= PCIM_MSIX_VCTRL_MASK;
1668 * Some devices (e.g. Samsung PM961) do not support reads of this
1669 * register, so always write the new value.
1671 bus_write_4(msix->msix_table_res, offset, val);
1675 pci_unmask_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, val;
1681 KASSERT(msix->msix_table_len > index, ("bogus index"));
1682 offset = msix->msix_table_offset + index * 16 + 12;
1683 val = bus_read_4(msix->msix_table_res, offset);
1684 val &= ~PCIM_MSIX_VCTRL_MASK;
1687 * Some devices (e.g. Samsung PM961) do not support reads of this
1688 * register, so always write the new value.
1690 bus_write_4(msix->msix_table_res, offset, val);
1694 pci_pending_msix(device_t dev, u_int index)
1696 struct pci_devinfo *dinfo = device_get_ivars(dev);
1697 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1698 uint32_t offset, bit;
1700 KASSERT(msix->msix_table_len > index, ("bogus index"));
1701 offset = msix->msix_pba_offset + (index / 32) * 4;
1702 bit = 1 << index % 32;
1703 return (bus_read_4(msix->msix_pba_res, offset) & bit);
1707 * Restore MSI-X registers and table during resume. If MSI-X is
1708 * enabled then walk the virtual table to restore the actual MSI-X
1712 pci_resume_msix(device_t dev)
1714 struct pci_devinfo *dinfo = device_get_ivars(dev);
1715 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1716 struct msix_table_entry *mte;
1717 struct msix_vector *mv;
1720 if (msix->msix_alloc > 0) {
1721 /* First, mask all vectors. */
1722 for (i = 0; i < msix->msix_msgnum; i++)
1723 pci_mask_msix(dev, i);
1725 /* Second, program any messages with at least one handler. */
1726 for (i = 0; i < msix->msix_table_len; i++) {
1727 mte = &msix->msix_table[i];
1728 if (mte->mte_vector == 0 || mte->mte_handlers == 0)
1730 mv = &msix->msix_vectors[mte->mte_vector - 1];
1731 pci_write_msix_entry(dev, i, mv->mv_address,
1733 pci_unmask_msix(dev, i);
1736 pci_write_config(dev, msix->msix_location + PCIR_MSIX_CTRL,
1737 msix->msix_ctrl, 2);
1741 * Attempt to allocate *count MSI-X messages. The actual number allocated is
1742 * returned in *count. After this function returns, each message will be
1743 * available to the driver as SYS_RES_IRQ resources starting at rid 1.
1746 pci_alloc_msix_method(device_t dev, device_t child, int *count)
1748 struct pci_devinfo *dinfo = device_get_ivars(child);
1749 pcicfgregs *cfg = &dinfo->cfg;
1750 struct resource_list_entry *rle;
1751 int actual, error, i, irq, max;
1753 /* Don't let count == 0 get us into trouble. */
1757 /* If rid 0 is allocated, then fail. */
1758 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
1759 if (rle != NULL && rle->res != NULL)
1762 /* Already have allocated messages? */
1763 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
1766 /* If MSI-X is blacklisted for this system, fail. */
1767 if (pci_msix_blacklisted())
1770 /* MSI-X capability present? */
1771 if (cfg->msix.msix_location == 0 || !pci_do_msix)
1774 /* Make sure the appropriate BARs are mapped. */
1775 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1776 cfg->msix.msix_table_bar);
1777 if (rle == NULL || rle->res == NULL ||
1778 !(rman_get_flags(rle->res) & RF_ACTIVE))
1780 cfg->msix.msix_table_res = rle->res;
1781 if (cfg->msix.msix_pba_bar != cfg->msix.msix_table_bar) {
1782 rle = resource_list_find(&dinfo->resources, SYS_RES_MEMORY,
1783 cfg->msix.msix_pba_bar);
1784 if (rle == NULL || rle->res == NULL ||
1785 !(rman_get_flags(rle->res) & RF_ACTIVE))
1788 cfg->msix.msix_pba_res = rle->res;
1791 device_printf(child,
1792 "attempting to allocate %d MSI-X vectors (%d supported)\n",
1793 *count, cfg->msix.msix_msgnum);
1794 max = min(*count, cfg->msix.msix_msgnum);
1795 for (i = 0; i < max; i++) {
1796 /* Allocate a message. */
1797 error = PCIB_ALLOC_MSIX(device_get_parent(dev), child, &irq);
1803 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
1809 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 1);
1811 device_printf(child, "using IRQ %ju for MSI-X\n",
1817 * Be fancy and try to print contiguous runs of
1818 * IRQ values as ranges. 'irq' is the previous IRQ.
1819 * 'run' is true if we are in a range.
1821 device_printf(child, "using IRQs %ju", rle->start);
1824 for (i = 1; i < actual; i++) {
1825 rle = resource_list_find(&dinfo->resources,
1826 SYS_RES_IRQ, i + 1);
1828 /* Still in a run? */
1829 if (rle->start == irq + 1) {
1835 /* Finish previous range. */
1841 /* Start new range. */
1842 printf(",%ju", rle->start);
1846 /* Unfinished range? */
1849 printf(" for MSI-X\n");
1853 /* Mask all vectors. */
1854 for (i = 0; i < cfg->msix.msix_msgnum; i++)
1855 pci_mask_msix(child, i);
1857 /* Allocate and initialize vector data and virtual table. */
1858 cfg->msix.msix_vectors = malloc(sizeof(struct msix_vector) * actual,
1859 M_DEVBUF, M_WAITOK | M_ZERO);
1860 cfg->msix.msix_table = malloc(sizeof(struct msix_table_entry) * actual,
1861 M_DEVBUF, M_WAITOK | M_ZERO);
1862 for (i = 0; i < actual; i++) {
1863 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1864 cfg->msix.msix_vectors[i].mv_irq = rle->start;
1865 cfg->msix.msix_table[i].mte_vector = i + 1;
1868 /* Update control register to enable MSI-X. */
1869 cfg->msix.msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE;
1870 pci_write_config(child, cfg->msix.msix_location + PCIR_MSIX_CTRL,
1871 cfg->msix.msix_ctrl, 2);
1873 /* Update counts of alloc'd messages. */
1874 cfg->msix.msix_alloc = actual;
1875 cfg->msix.msix_table_len = actual;
1881 * By default, pci_alloc_msix() will assign the allocated IRQ
1882 * resources consecutively to the first N messages in the MSI-X table.
1883 * However, device drivers may want to use different layouts if they
1884 * either receive fewer messages than they asked for, or they wish to
1885 * populate the MSI-X table sparsely. This method allows the driver
1886 * to specify what layout it wants. It must be called after a
1887 * successful pci_alloc_msix() but before any of the associated
1888 * SYS_RES_IRQ resources are allocated via bus_alloc_resource().
1890 * The 'vectors' array contains 'count' message vectors. The array
1891 * maps directly to the MSI-X table in that index 0 in the array
1892 * specifies the vector for the first message in the MSI-X table, etc.
1893 * The vector value in each array index can either be 0 to indicate
1894 * that no vector should be assigned to a message slot, or it can be a
1895 * number from 1 to N (where N is the count returned from a
1896 * succcessful call to pci_alloc_msix()) to indicate which message
1897 * vector (IRQ) to be used for the corresponding message.
1899 * On successful return, each message with a non-zero vector will have
1900 * an associated SYS_RES_IRQ whose rid is equal to the array index +
1901 * 1. Additionally, if any of the IRQs allocated via the previous
1902 * call to pci_alloc_msix() are not used in the mapping, those IRQs
1903 * will be freed back to the system automatically.
1905 * For example, suppose a driver has a MSI-X table with 6 messages and
1906 * asks for 6 messages, but pci_alloc_msix() only returns a count of
1907 * 3. Call the three vectors allocated by pci_alloc_msix() A, B, and
1908 * C. After the call to pci_alloc_msix(), the device will be setup to
1909 * have an MSI-X table of ABC--- (where - means no vector assigned).
1910 * If the driver then passes a vector array of { 1, 0, 1, 2, 0, 2 },
1911 * then the MSI-X table will look like A-AB-B, and the 'C' vector will
1912 * be freed back to the system. This device will also have valid
1913 * SYS_RES_IRQ rids of 1, 3, 4, and 6.
1915 * In any case, the SYS_RES_IRQ rid X will always map to the message
1916 * at MSI-X table index X - 1 and will only be valid if a vector is
1917 * assigned to that table entry.
1920 pci_remap_msix_method(device_t dev, device_t child, int count,
1921 const u_int *vectors)
1923 struct pci_devinfo *dinfo = device_get_ivars(child);
1924 struct pcicfg_msix *msix = &dinfo->cfg.msix;
1925 struct resource_list_entry *rle;
1926 int i, irq, j, *used;
1929 * Have to have at least one message in the table but the
1930 * table can't be bigger than the actual MSI-X table in the
1933 if (count == 0 || count > msix->msix_msgnum)
1936 /* Sanity check the vectors. */
1937 for (i = 0; i < count; i++)
1938 if (vectors[i] > msix->msix_alloc)
1942 * Make sure there aren't any holes in the vectors to be used.
1943 * It's a big pain to support it, and it doesn't really make
1944 * sense anyway. Also, at least one vector must be used.
1946 used = malloc(sizeof(int) * msix->msix_alloc, M_DEVBUF, M_WAITOK |
1948 for (i = 0; i < count; i++)
1949 if (vectors[i] != 0)
1950 used[vectors[i] - 1] = 1;
1951 for (i = 0; i < msix->msix_alloc - 1; i++)
1952 if (used[i] == 0 && used[i + 1] == 1) {
1953 free(used, M_DEVBUF);
1957 free(used, M_DEVBUF);
1961 /* Make sure none of the resources are allocated. */
1962 for (i = 0; i < msix->msix_table_len; i++) {
1963 if (msix->msix_table[i].mte_vector == 0)
1965 if (msix->msix_table[i].mte_handlers > 0) {
1966 free(used, M_DEVBUF);
1969 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
1970 KASSERT(rle != NULL, ("missing resource"));
1971 if (rle->res != NULL) {
1972 free(used, M_DEVBUF);
1977 /* Free the existing resource list entries. */
1978 for (i = 0; i < msix->msix_table_len; i++) {
1979 if (msix->msix_table[i].mte_vector == 0)
1981 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
1985 * Build the new virtual table keeping track of which vectors are
1988 free(msix->msix_table, M_DEVBUF);
1989 msix->msix_table = malloc(sizeof(struct msix_table_entry) * count,
1990 M_DEVBUF, M_WAITOK | M_ZERO);
1991 for (i = 0; i < count; i++)
1992 msix->msix_table[i].mte_vector = vectors[i];
1993 msix->msix_table_len = count;
1995 /* Free any unused IRQs and resize the vectors array if necessary. */
1996 j = msix->msix_alloc - 1;
1998 struct msix_vector *vec;
2000 while (used[j] == 0) {
2001 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2002 msix->msix_vectors[j].mv_irq);
2005 vec = malloc(sizeof(struct msix_vector) * (j + 1), M_DEVBUF,
2007 bcopy(msix->msix_vectors, vec, sizeof(struct msix_vector) *
2009 free(msix->msix_vectors, M_DEVBUF);
2010 msix->msix_vectors = vec;
2011 msix->msix_alloc = j + 1;
2013 free(used, M_DEVBUF);
2015 /* Map the IRQs onto the rids. */
2016 for (i = 0; i < count; i++) {
2017 if (vectors[i] == 0)
2019 irq = msix->msix_vectors[vectors[i] - 1].mv_irq;
2020 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1, irq,
2025 device_printf(child, "Remapped MSI-X IRQs as: ");
2026 for (i = 0; i < count; i++) {
2029 if (vectors[i] == 0)
2033 msix->msix_vectors[vectors[i] - 1].mv_irq);
2042 pci_release_msix(device_t dev, device_t child)
2044 struct pci_devinfo *dinfo = device_get_ivars(child);
2045 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2046 struct resource_list_entry *rle;
2049 /* Do we have any messages to release? */
2050 if (msix->msix_alloc == 0)
2053 /* Make sure none of the resources are allocated. */
2054 for (i = 0; i < msix->msix_table_len; i++) {
2055 if (msix->msix_table[i].mte_vector == 0)
2057 if (msix->msix_table[i].mte_handlers > 0)
2059 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2060 KASSERT(rle != NULL, ("missing resource"));
2061 if (rle->res != NULL)
2065 /* Update control register to disable MSI-X. */
2066 msix->msix_ctrl &= ~PCIM_MSIXCTRL_MSIX_ENABLE;
2067 pci_write_config(child, msix->msix_location + PCIR_MSIX_CTRL,
2068 msix->msix_ctrl, 2);
2070 /* Free the resource list entries. */
2071 for (i = 0; i < msix->msix_table_len; i++) {
2072 if (msix->msix_table[i].mte_vector == 0)
2074 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2076 free(msix->msix_table, M_DEVBUF);
2077 msix->msix_table_len = 0;
2079 /* Release the IRQs. */
2080 for (i = 0; i < msix->msix_alloc; i++)
2081 PCIB_RELEASE_MSIX(device_get_parent(dev), child,
2082 msix->msix_vectors[i].mv_irq);
2083 free(msix->msix_vectors, M_DEVBUF);
2084 msix->msix_alloc = 0;
2089 * Return the max supported MSI-X messages this device supports.
2090 * Basically, assuming the MD code can alloc messages, this function
2091 * should return the maximum value that pci_alloc_msix() can return.
2092 * Thus, it is subject to the tunables, etc.
2095 pci_msix_count_method(device_t dev, device_t child)
2097 struct pci_devinfo *dinfo = device_get_ivars(child);
2098 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2100 if (pci_do_msix && msix->msix_location != 0)
2101 return (msix->msix_msgnum);
2106 pci_msix_pba_bar_method(device_t dev, device_t child)
2108 struct pci_devinfo *dinfo = device_get_ivars(child);
2109 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2111 if (pci_do_msix && msix->msix_location != 0)
2112 return (msix->msix_pba_bar);
2117 pci_msix_table_bar_method(device_t dev, device_t child)
2119 struct pci_devinfo *dinfo = device_get_ivars(child);
2120 struct pcicfg_msix *msix = &dinfo->cfg.msix;
2122 if (pci_do_msix && msix->msix_location != 0)
2123 return (msix->msix_table_bar);
2128 * HyperTransport MSI mapping control
2131 pci_ht_map_msi(device_t dev, uint64_t addr)
2133 struct pci_devinfo *dinfo = device_get_ivars(dev);
2134 struct pcicfg_ht *ht = &dinfo->cfg.ht;
2139 if (addr && !(ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) &&
2140 ht->ht_msiaddr >> 20 == addr >> 20) {
2141 /* Enable MSI -> HT mapping. */
2142 ht->ht_msictrl |= PCIM_HTCMD_MSI_ENABLE;
2143 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2147 if (!addr && ht->ht_msictrl & PCIM_HTCMD_MSI_ENABLE) {
2148 /* Disable MSI -> HT mapping. */
2149 ht->ht_msictrl &= ~PCIM_HTCMD_MSI_ENABLE;
2150 pci_write_config(dev, ht->ht_msimap + PCIR_HT_COMMAND,
2156 pci_get_max_payload(device_t dev)
2158 struct pci_devinfo *dinfo = device_get_ivars(dev);
2162 cap = dinfo->cfg.pcie.pcie_location;
2165 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2166 val &= PCIEM_CTL_MAX_PAYLOAD;
2168 return (1 << (val + 7));
2172 pci_get_max_read_req(device_t dev)
2174 struct pci_devinfo *dinfo = device_get_ivars(dev);
2178 cap = dinfo->cfg.pcie.pcie_location;
2181 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2182 val &= PCIEM_CTL_MAX_READ_REQUEST;
2184 return (1 << (val + 7));
2188 pci_set_max_read_req(device_t dev, int size)
2190 struct pci_devinfo *dinfo = device_get_ivars(dev);
2194 cap = dinfo->cfg.pcie.pcie_location;
2201 size = (1 << (fls(size) - 1));
2202 val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
2203 val &= ~PCIEM_CTL_MAX_READ_REQUEST;
2204 val |= (fls(size) - 8) << 12;
2205 pci_write_config(dev, cap + PCIER_DEVICE_CTL, val, 2);
2210 pcie_read_config(device_t dev, int reg, int width)
2212 struct pci_devinfo *dinfo = device_get_ivars(dev);
2215 cap = dinfo->cfg.pcie.pcie_location;
2219 return (0xffffffff);
2222 return (pci_read_config(dev, cap + reg, width));
2226 pcie_write_config(device_t dev, int reg, uint32_t value, int width)
2228 struct pci_devinfo *dinfo = device_get_ivars(dev);
2231 cap = dinfo->cfg.pcie.pcie_location;
2234 pci_write_config(dev, cap + reg, value, width);
2238 * Adjusts a PCI-e capability register by clearing the bits in mask
2239 * and setting the bits in (value & mask). Bits not set in mask are
2242 * Returns the old value on success or all ones on failure.
2245 pcie_adjust_config(device_t dev, int reg, uint32_t mask, uint32_t value,
2248 struct pci_devinfo *dinfo = device_get_ivars(dev);
2252 cap = dinfo->cfg.pcie.pcie_location;
2256 return (0xffffffff);
2259 old = pci_read_config(dev, cap + reg, width);
2261 new |= (value & mask);
2262 pci_write_config(dev, cap + reg, new, width);
2267 * Support for MSI message signalled interrupts.
2270 pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
2273 struct pci_devinfo *dinfo = device_get_ivars(child);
2274 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2276 /* Write data and address values. */
2277 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR,
2278 address & 0xffffffff, 4);
2279 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2280 pci_write_config(child, msi->msi_location + PCIR_MSI_ADDR_HIGH,
2282 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA_64BIT,
2285 pci_write_config(child, msi->msi_location + PCIR_MSI_DATA, data,
2288 /* Enable MSI in the control register. */
2289 msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
2290 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2293 /* Enable MSI -> HT mapping. */
2294 pci_ht_map_msi(child, address);
2298 pci_disable_msi_method(device_t dev, device_t child)
2300 struct pci_devinfo *dinfo = device_get_ivars(child);
2301 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2303 /* Disable MSI -> HT mapping. */
2304 pci_ht_map_msi(child, 0);
2306 /* Disable MSI in the control register. */
2307 msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
2308 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2313 * Restore MSI registers during resume. If MSI is enabled then
2314 * restore the data and address registers in addition to the control
2318 pci_resume_msi(device_t dev)
2320 struct pci_devinfo *dinfo = device_get_ivars(dev);
2321 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2325 if (msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE) {
2326 address = msi->msi_addr;
2327 data = msi->msi_data;
2328 pci_write_config(dev, msi->msi_location + PCIR_MSI_ADDR,
2329 address & 0xffffffff, 4);
2330 if (msi->msi_ctrl & PCIM_MSICTRL_64BIT) {
2331 pci_write_config(dev, msi->msi_location +
2332 PCIR_MSI_ADDR_HIGH, address >> 32, 4);
2333 pci_write_config(dev, msi->msi_location +
2334 PCIR_MSI_DATA_64BIT, data, 2);
2336 pci_write_config(dev, msi->msi_location + PCIR_MSI_DATA,
2339 pci_write_config(dev, msi->msi_location + PCIR_MSI_CTRL, msi->msi_ctrl,
2344 pci_remap_intr_method(device_t bus, device_t dev, u_int irq)
2346 struct pci_devinfo *dinfo = device_get_ivars(dev);
2347 pcicfgregs *cfg = &dinfo->cfg;
2348 struct resource_list_entry *rle;
2349 struct msix_table_entry *mte;
2350 struct msix_vector *mv;
2356 * Handle MSI first. We try to find this IRQ among our list
2357 * of MSI IRQs. If we find it, we request updated address and
2358 * data registers and apply the results.
2360 if (cfg->msi.msi_alloc > 0) {
2362 /* If we don't have any active handlers, nothing to do. */
2363 if (cfg->msi.msi_handlers == 0)
2365 for (i = 0; i < cfg->msi.msi_alloc; i++) {
2366 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ,
2368 if (rle->start == irq) {
2369 error = PCIB_MAP_MSI(device_get_parent(bus),
2370 dev, irq, &addr, &data);
2373 pci_disable_msi(dev);
2374 dinfo->cfg.msi.msi_addr = addr;
2375 dinfo->cfg.msi.msi_data = data;
2376 pci_enable_msi(dev, addr, data);
2384 * For MSI-X, we check to see if we have this IRQ. If we do,
2385 * we request the updated mapping info. If that works, we go
2386 * through all the slots that use this IRQ and update them.
2388 if (cfg->msix.msix_alloc > 0) {
2389 for (i = 0; i < cfg->msix.msix_alloc; i++) {
2390 mv = &cfg->msix.msix_vectors[i];
2391 if (mv->mv_irq == irq) {
2392 error = PCIB_MAP_MSI(device_get_parent(bus),
2393 dev, irq, &addr, &data);
2396 mv->mv_address = addr;
2398 for (j = 0; j < cfg->msix.msix_table_len; j++) {
2399 mte = &cfg->msix.msix_table[j];
2400 if (mte->mte_vector != i + 1)
2402 if (mte->mte_handlers == 0)
2404 pci_mask_msix(dev, j);
2405 pci_enable_msix(dev, j, addr, data);
2406 pci_unmask_msix(dev, j);
2417 * Returns true if the specified device is blacklisted because MSI
2421 pci_msi_device_blacklisted(device_t dev)
2424 if (!pci_honor_msi_blacklist)
2427 return (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSI));
2431 * Determine if MSI is blacklisted globally on this system. Currently,
2432 * we just check for blacklisted chipsets as represented by the
2433 * host-PCI bridge at device 0:0:0. In the future, it may become
2434 * necessary to check other system attributes, such as the kenv values
2435 * that give the motherboard manufacturer and model number.
2438 pci_msi_blacklisted(void)
2442 if (!pci_honor_msi_blacklist)
2445 /* Blacklist all non-PCI-express and non-PCI-X chipsets. */
2446 if (!(pcie_chipset || pcix_chipset)) {
2447 if (vm_guest != VM_GUEST_NO) {
2449 * Whitelist older chipsets in virtual
2450 * machines known to support MSI.
2452 dev = pci_find_bsf(0, 0, 0);
2454 return (!pci_has_quirk(pci_get_devid(dev),
2455 PCI_QUIRK_ENABLE_MSI_VM));
2460 dev = pci_find_bsf(0, 0, 0);
2462 return (pci_msi_device_blacklisted(dev));
2467 * Returns true if the specified device is blacklisted because MSI-X
2468 * doesn't work. Note that this assumes that if MSI doesn't work,
2469 * MSI-X doesn't either.
2472 pci_msix_device_blacklisted(device_t dev)
2475 if (!pci_honor_msi_blacklist)
2478 if (pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_DISABLE_MSIX))
2481 return (pci_msi_device_blacklisted(dev));
2485 * Determine if MSI-X is blacklisted globally on this system. If MSI
2486 * is blacklisted, assume that MSI-X is as well. Check for additional
2487 * chipsets where MSI works but MSI-X does not.
2490 pci_msix_blacklisted(void)
2494 if (!pci_honor_msi_blacklist)
2497 dev = pci_find_bsf(0, 0, 0);
2498 if (dev != NULL && pci_has_quirk(pci_get_devid(dev),
2499 PCI_QUIRK_DISABLE_MSIX))
2502 return (pci_msi_blacklisted());
2506 * Attempt to allocate *count MSI messages. The actual number allocated is
2507 * returned in *count. After this function returns, each message will be
2508 * available to the driver as SYS_RES_IRQ resources starting at a rid 1.
2511 pci_alloc_msi_method(device_t dev, device_t child, int *count)
2513 struct pci_devinfo *dinfo = device_get_ivars(child);
2514 pcicfgregs *cfg = &dinfo->cfg;
2515 struct resource_list_entry *rle;
2516 int actual, error, i, irqs[32];
2519 /* Don't let count == 0 get us into trouble. */
2523 /* If rid 0 is allocated, then fail. */
2524 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
2525 if (rle != NULL && rle->res != NULL)
2528 /* Already have allocated messages? */
2529 if (cfg->msi.msi_alloc != 0 || cfg->msix.msix_alloc != 0)
2532 /* If MSI is blacklisted for this system, fail. */
2533 if (pci_msi_blacklisted())
2536 /* MSI capability present? */
2537 if (cfg->msi.msi_location == 0 || !pci_do_msi)
2541 device_printf(child,
2542 "attempting to allocate %d MSI vectors (%d supported)\n",
2543 *count, cfg->msi.msi_msgnum);
2545 /* Don't ask for more than the device supports. */
2546 actual = min(*count, cfg->msi.msi_msgnum);
2548 /* Don't ask for more than 32 messages. */
2549 actual = min(actual, 32);
2551 /* MSI requires power of 2 number of messages. */
2552 if (!powerof2(actual))
2556 /* Try to allocate N messages. */
2557 error = PCIB_ALLOC_MSI(device_get_parent(dev), child, actual,
2569 * We now have N actual messages mapped onto SYS_RES_IRQ
2570 * resources in the irqs[] array, so add new resources
2571 * starting at rid 1.
2573 for (i = 0; i < actual; i++)
2574 resource_list_add(&dinfo->resources, SYS_RES_IRQ, i + 1,
2575 irqs[i], irqs[i], 1);
2579 device_printf(child, "using IRQ %d for MSI\n", irqs[0]);
2584 * Be fancy and try to print contiguous runs
2585 * of IRQ values as ranges. 'run' is true if
2586 * we are in a range.
2588 device_printf(child, "using IRQs %d", irqs[0]);
2590 for (i = 1; i < actual; i++) {
2592 /* Still in a run? */
2593 if (irqs[i] == irqs[i - 1] + 1) {
2598 /* Finish previous range. */
2600 printf("-%d", irqs[i - 1]);
2604 /* Start new range. */
2605 printf(",%d", irqs[i]);
2608 /* Unfinished range? */
2610 printf("-%d", irqs[actual - 1]);
2611 printf(" for MSI\n");
2615 /* Update control register with actual count. */
2616 ctrl = cfg->msi.msi_ctrl;
2617 ctrl &= ~PCIM_MSICTRL_MME_MASK;
2618 ctrl |= (ffs(actual) - 1) << 4;
2619 cfg->msi.msi_ctrl = ctrl;
2620 pci_write_config(child, cfg->msi.msi_location + PCIR_MSI_CTRL, ctrl, 2);
2622 /* Update counts of alloc'd messages. */
2623 cfg->msi.msi_alloc = actual;
2624 cfg->msi.msi_handlers = 0;
2629 /* Release the MSI messages associated with this device. */
2631 pci_release_msi_method(device_t dev, device_t child)
2633 struct pci_devinfo *dinfo = device_get_ivars(child);
2634 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2635 struct resource_list_entry *rle;
2636 int error, i, irqs[32];
2638 /* Try MSI-X first. */
2639 error = pci_release_msix(dev, child);
2640 if (error != ENODEV)
2643 /* Do we have any messages to release? */
2644 if (msi->msi_alloc == 0)
2646 KASSERT(msi->msi_alloc <= 32, ("more than 32 alloc'd messages"));
2648 /* Make sure none of the resources are allocated. */
2649 if (msi->msi_handlers > 0)
2651 for (i = 0; i < msi->msi_alloc; i++) {
2652 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, i + 1);
2653 KASSERT(rle != NULL, ("missing MSI resource"));
2654 if (rle->res != NULL)
2656 irqs[i] = rle->start;
2659 /* Update control register with 0 count. */
2660 KASSERT(!(msi->msi_ctrl & PCIM_MSICTRL_MSI_ENABLE),
2661 ("%s: MSI still enabled", __func__));
2662 msi->msi_ctrl &= ~PCIM_MSICTRL_MME_MASK;
2663 pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
2666 /* Release the messages. */
2667 PCIB_RELEASE_MSI(device_get_parent(dev), child, msi->msi_alloc, irqs);
2668 for (i = 0; i < msi->msi_alloc; i++)
2669 resource_list_delete(&dinfo->resources, SYS_RES_IRQ, i + 1);
2671 /* Update alloc count. */
2679 * Return the max supported MSI messages this device supports.
2680 * Basically, assuming the MD code can alloc messages, this function
2681 * should return the maximum value that pci_alloc_msi() can return.
2682 * Thus, it is subject to the tunables, etc.
2685 pci_msi_count_method(device_t dev, device_t child)
2687 struct pci_devinfo *dinfo = device_get_ivars(child);
2688 struct pcicfg_msi *msi = &dinfo->cfg.msi;
2690 if (pci_do_msi && msi->msi_location != 0)
2691 return (msi->msi_msgnum);
2695 /* free pcicfgregs structure and all depending data structures */
2698 pci_freecfg(struct pci_devinfo *dinfo)
2700 struct devlist *devlist_head;
2701 struct pci_map *pm, *next;
2704 devlist_head = &pci_devq;
2706 if (dinfo->cfg.vpd.vpd_reg) {
2707 free(dinfo->cfg.vpd.vpd_ident, M_DEVBUF);
2708 for (i = 0; i < dinfo->cfg.vpd.vpd_rocnt; i++)
2709 free(dinfo->cfg.vpd.vpd_ros[i].value, M_DEVBUF);
2710 free(dinfo->cfg.vpd.vpd_ros, M_DEVBUF);
2711 for (i = 0; i < dinfo->cfg.vpd.vpd_wcnt; i++)
2712 free(dinfo->cfg.vpd.vpd_w[i].value, M_DEVBUF);
2713 free(dinfo->cfg.vpd.vpd_w, M_DEVBUF);
2715 STAILQ_FOREACH_SAFE(pm, &dinfo->cfg.maps, pm_link, next) {
2718 STAILQ_REMOVE(devlist_head, dinfo, pci_devinfo, pci_links);
2719 free(dinfo, M_DEVBUF);
2721 /* increment the generation count */
2724 /* we're losing one device */
2730 * PCI power manangement
2733 pci_set_powerstate_method(device_t dev, device_t child, int state)
2735 struct pci_devinfo *dinfo = device_get_ivars(child);
2736 pcicfgregs *cfg = &dinfo->cfg;
2738 int oldstate, highest, delay;
2740 if (cfg->pp.pp_cap == 0)
2741 return (EOPNOTSUPP);
2744 * Optimize a no state change request away. While it would be OK to
2745 * write to the hardware in theory, some devices have shown odd
2746 * behavior when going from D3 -> D3.
2748 oldstate = pci_get_powerstate(child);
2749 if (oldstate == state)
2753 * The PCI power management specification states that after a state
2754 * transition between PCI power states, system software must
2755 * guarantee a minimal delay before the function accesses the device.
2756 * Compute the worst case delay that we need to guarantee before we
2757 * access the device. Many devices will be responsive much more
2758 * quickly than this delay, but there are some that don't respond
2759 * instantly to state changes. Transitions to/from D3 state require
2760 * 10ms, while D2 requires 200us, and D0/1 require none. The delay
2761 * is done below with DELAY rather than a sleeper function because
2762 * this function can be called from contexts where we cannot sleep.
2764 highest = (oldstate > state) ? oldstate : state;
2765 if (highest == PCI_POWERSTATE_D3)
2767 else if (highest == PCI_POWERSTATE_D2)
2771 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2)
2772 & ~PCIM_PSTAT_DMASK;
2774 case PCI_POWERSTATE_D0:
2775 status |= PCIM_PSTAT_D0;
2777 case PCI_POWERSTATE_D1:
2778 if ((cfg->pp.pp_cap & PCIM_PCAP_D1SUPP) == 0)
2779 return (EOPNOTSUPP);
2780 status |= PCIM_PSTAT_D1;
2782 case PCI_POWERSTATE_D2:
2783 if ((cfg->pp.pp_cap & PCIM_PCAP_D2SUPP) == 0)
2784 return (EOPNOTSUPP);
2785 status |= PCIM_PSTAT_D2;
2787 case PCI_POWERSTATE_D3:
2788 status |= PCIM_PSTAT_D3;
2795 pci_printf(cfg, "Transition from D%d to D%d\n", oldstate,
2798 PCI_WRITE_CONFIG(dev, child, cfg->pp.pp_status, status, 2);
2805 pci_get_powerstate_method(device_t dev, device_t child)
2807 struct pci_devinfo *dinfo = device_get_ivars(child);
2808 pcicfgregs *cfg = &dinfo->cfg;
2812 if (cfg->pp.pp_cap != 0) {
2813 status = PCI_READ_CONFIG(dev, child, cfg->pp.pp_status, 2);
2814 switch (status & PCIM_PSTAT_DMASK) {
2816 result = PCI_POWERSTATE_D0;
2819 result = PCI_POWERSTATE_D1;
2822 result = PCI_POWERSTATE_D2;
2825 result = PCI_POWERSTATE_D3;
2828 result = PCI_POWERSTATE_UNKNOWN;
2832 /* No support, device is always at D0 */
2833 result = PCI_POWERSTATE_D0;
2839 * Some convenience functions for PCI device drivers.
2842 static __inline void
2843 pci_set_command_bit(device_t dev, device_t child, uint16_t bit)
2847 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2849 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2852 static __inline void
2853 pci_clear_command_bit(device_t dev, device_t child, uint16_t bit)
2857 command = PCI_READ_CONFIG(dev, child, PCIR_COMMAND, 2);
2859 PCI_WRITE_CONFIG(dev, child, PCIR_COMMAND, command, 2);
2863 pci_enable_busmaster_method(device_t dev, device_t child)
2865 pci_set_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2870 pci_disable_busmaster_method(device_t dev, device_t child)
2872 pci_clear_command_bit(dev, child, PCIM_CMD_BUSMASTEREN);
2877 pci_enable_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_set_command_bit(dev, child, bit);
2896 pci_disable_io_method(device_t dev, device_t child, int space)
2901 case SYS_RES_IOPORT:
2902 bit = PCIM_CMD_PORTEN;
2904 case SYS_RES_MEMORY:
2905 bit = PCIM_CMD_MEMEN;
2910 pci_clear_command_bit(dev, child, bit);
2915 * New style pci driver. Parent device is either a pci-host-bridge or a
2916 * pci-pci-bridge. Both kinds are represented by instances of pcib.
2920 pci_print_verbose(struct pci_devinfo *dinfo)
2924 pcicfgregs *cfg = &dinfo->cfg;
2926 printf("found->\tvendor=0x%04x, dev=0x%04x, revid=0x%02x\n",
2927 cfg->vendor, cfg->device, cfg->revid);
2928 printf("\tdomain=%d, bus=%d, slot=%d, func=%d\n",
2929 cfg->domain, cfg->bus, cfg->slot, cfg->func);
2930 printf("\tclass=%02x-%02x-%02x, hdrtype=0x%02x, mfdev=%d\n",
2931 cfg->baseclass, cfg->subclass, cfg->progif, cfg->hdrtype,
2933 printf("\tcmdreg=0x%04x, statreg=0x%04x, cachelnsz=%d (dwords)\n",
2934 cfg->cmdreg, cfg->statreg, cfg->cachelnsz);
2935 printf("\tlattimer=0x%02x (%d ns), mingnt=0x%02x (%d ns), maxlat=0x%02x (%d ns)\n",
2936 cfg->lattimer, cfg->lattimer * 30, cfg->mingnt,
2937 cfg->mingnt * 250, cfg->maxlat, cfg->maxlat * 250);
2938 if (cfg->intpin > 0)
2939 printf("\tintpin=%c, irq=%d\n",
2940 cfg->intpin +'a' -1, cfg->intline);
2941 if (cfg->pp.pp_cap) {
2944 status = pci_read_config(cfg->dev, cfg->pp.pp_status, 2);
2945 printf("\tpowerspec %d supports D0%s%s D3 current D%d\n",
2946 cfg->pp.pp_cap & PCIM_PCAP_SPEC,
2947 cfg->pp.pp_cap & PCIM_PCAP_D1SUPP ? " D1" : "",
2948 cfg->pp.pp_cap & PCIM_PCAP_D2SUPP ? " D2" : "",
2949 status & PCIM_PSTAT_DMASK);
2951 if (cfg->msi.msi_location) {
2954 ctrl = cfg->msi.msi_ctrl;
2955 printf("\tMSI supports %d message%s%s%s\n",
2956 cfg->msi.msi_msgnum,
2957 (cfg->msi.msi_msgnum == 1) ? "" : "s",
2958 (ctrl & PCIM_MSICTRL_64BIT) ? ", 64 bit" : "",
2959 (ctrl & PCIM_MSICTRL_VECTOR) ? ", vector masks":"");
2961 if (cfg->msix.msix_location) {
2962 printf("\tMSI-X supports %d message%s ",
2963 cfg->msix.msix_msgnum,
2964 (cfg->msix.msix_msgnum == 1) ? "" : "s");
2965 if (cfg->msix.msix_table_bar == cfg->msix.msix_pba_bar)
2966 printf("in map 0x%x\n",
2967 cfg->msix.msix_table_bar);
2969 printf("in maps 0x%x and 0x%x\n",
2970 cfg->msix.msix_table_bar,
2971 cfg->msix.msix_pba_bar);
2977 pci_porten(device_t dev)
2979 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_PORTEN) != 0;
2983 pci_memen(device_t dev)
2985 return (pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_MEMEN) != 0;
2989 pci_read_bar(device_t dev, int reg, pci_addr_t *mapp, pci_addr_t *testvalp,
2992 struct pci_devinfo *dinfo;
2993 pci_addr_t map, testval;
2998 * The device ROM BAR is special. It is always a 32-bit
2999 * memory BAR. Bit 0 is special and should not be set when
3002 dinfo = device_get_ivars(dev);
3003 if (PCIR_IS_BIOS(&dinfo->cfg, reg)) {
3004 map = pci_read_config(dev, reg, 4);
3005 pci_write_config(dev, reg, 0xfffffffe, 4);
3006 testval = pci_read_config(dev, reg, 4);
3007 pci_write_config(dev, reg, map, 4);
3009 *testvalp = testval;
3015 map = pci_read_config(dev, reg, 4);
3016 ln2range = pci_maprange(map);
3018 map |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3021 * Disable decoding via the command register before
3022 * determining the BAR's length since we will be placing it in
3025 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3026 pci_write_config(dev, PCIR_COMMAND,
3027 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
3030 * Determine the BAR's length by writing all 1's. The bottom
3031 * log_2(size) bits of the BAR will stick as 0 when we read
3034 * NB: according to the PCI Local Bus Specification, rev. 3.0:
3035 * "Software writes 0FFFFFFFFh to both registers, reads them back,
3036 * and combines the result into a 64-bit value." (section 6.2.5.1)
3038 * Writes to both registers must be performed before attempting to
3039 * read back the size value.
3042 pci_write_config(dev, reg, 0xffffffff, 4);
3043 if (ln2range == 64) {
3044 pci_write_config(dev, reg + 4, 0xffffffff, 4);
3045 testval |= (pci_addr_t)pci_read_config(dev, reg + 4, 4) << 32;
3047 testval |= pci_read_config(dev, reg, 4);
3050 * Restore the original value of the BAR. We may have reprogrammed
3051 * the BAR of the low-level console device and when booting verbose,
3052 * we need the console device addressable.
3054 pci_write_config(dev, reg, map, 4);
3056 pci_write_config(dev, reg + 4, map >> 32, 4);
3057 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3060 *testvalp = testval;
3062 *bar64 = (ln2range == 64);
3066 pci_write_bar(device_t dev, struct pci_map *pm, pci_addr_t base)
3068 struct pci_devinfo *dinfo;
3071 /* The device ROM BAR is always a 32-bit memory BAR. */
3072 dinfo = device_get_ivars(dev);
3073 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3076 ln2range = pci_maprange(pm->pm_value);
3077 pci_write_config(dev, pm->pm_reg, base, 4);
3079 pci_write_config(dev, pm->pm_reg + 4, base >> 32, 4);
3080 pm->pm_value = pci_read_config(dev, pm->pm_reg, 4);
3082 pm->pm_value |= (pci_addr_t)pci_read_config(dev,
3083 pm->pm_reg + 4, 4) << 32;
3087 pci_find_bar(device_t dev, int reg)
3089 struct pci_devinfo *dinfo;
3092 dinfo = device_get_ivars(dev);
3093 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3094 if (pm->pm_reg == reg)
3101 pci_bar_enabled(device_t dev, struct pci_map *pm)
3103 struct pci_devinfo *dinfo;
3106 dinfo = device_get_ivars(dev);
3107 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) &&
3108 !(pm->pm_value & PCIM_BIOS_ENABLE))
3110 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3111 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg) || PCI_BAR_MEM(pm->pm_value))
3112 return ((cmd & PCIM_CMD_MEMEN) != 0);
3114 return ((cmd & PCIM_CMD_PORTEN) != 0);
3118 pci_add_bar(device_t dev, int reg, pci_addr_t value, pci_addr_t size)
3120 struct pci_devinfo *dinfo;
3121 struct pci_map *pm, *prev;
3123 dinfo = device_get_ivars(dev);
3124 pm = malloc(sizeof(*pm), M_DEVBUF, M_WAITOK | M_ZERO);
3126 pm->pm_value = value;
3128 STAILQ_FOREACH(prev, &dinfo->cfg.maps, pm_link) {
3129 KASSERT(prev->pm_reg != pm->pm_reg, ("duplicate map %02x",
3131 if (STAILQ_NEXT(prev, pm_link) == NULL ||
3132 STAILQ_NEXT(prev, pm_link)->pm_reg > pm->pm_reg)
3136 STAILQ_INSERT_AFTER(&dinfo->cfg.maps, prev, pm, pm_link);
3138 STAILQ_INSERT_TAIL(&dinfo->cfg.maps, pm, pm_link);
3143 pci_restore_bars(device_t dev)
3145 struct pci_devinfo *dinfo;
3149 dinfo = device_get_ivars(dev);
3150 STAILQ_FOREACH(pm, &dinfo->cfg.maps, pm_link) {
3151 if (PCIR_IS_BIOS(&dinfo->cfg, pm->pm_reg))
3154 ln2range = pci_maprange(pm->pm_value);
3155 pci_write_config(dev, pm->pm_reg, pm->pm_value, 4);
3157 pci_write_config(dev, pm->pm_reg + 4,
3158 pm->pm_value >> 32, 4);
3163 * Add a resource based on a pci map register. Return 1 if the map
3164 * register is a 32bit map register or 2 if it is a 64bit register.
3167 pci_add_map(device_t bus, device_t dev, int reg, struct resource_list *rl,
3168 int force, int prefetch)
3171 pci_addr_t base, map, testval;
3172 pci_addr_t start, end, count;
3173 int barlen, basezero, flags, maprange, mapsize, type;
3175 struct resource *res;
3178 * The BAR may already exist if the device is a CardBus card
3179 * whose CIS is stored in this BAR.
3181 pm = pci_find_bar(dev, reg);
3183 maprange = pci_maprange(pm->pm_value);
3184 barlen = maprange == 64 ? 2 : 1;
3188 pci_read_bar(dev, reg, &map, &testval, NULL);
3189 if (PCI_BAR_MEM(map)) {
3190 type = SYS_RES_MEMORY;
3191 if (map & PCIM_BAR_MEM_PREFETCH)
3194 type = SYS_RES_IOPORT;
3195 mapsize = pci_mapsize(testval);
3196 base = pci_mapbase(map);
3197 #ifdef __PCI_BAR_ZERO_VALID
3200 basezero = base == 0;
3202 maprange = pci_maprange(map);
3203 barlen = maprange == 64 ? 2 : 1;
3206 * For I/O registers, if bottom bit is set, and the next bit up
3207 * isn't clear, we know we have a BAR that doesn't conform to the
3208 * spec, so ignore it. Also, sanity check the size of the data
3209 * areas to the type of memory involved. Memory must be at least
3210 * 16 bytes in size, while I/O ranges must be at least 4.
3212 if (PCI_BAR_IO(testval) && (testval & PCIM_BAR_IO_RESERVED) != 0)
3214 if ((type == SYS_RES_MEMORY && mapsize < 4) ||
3215 (type == SYS_RES_IOPORT && mapsize < 2))
3218 /* Save a record of this BAR. */
3219 pm = pci_add_bar(dev, reg, map, mapsize);
3221 printf("\tmap[%02x]: type %s, range %2d, base %#jx, size %2d",
3222 reg, pci_maptype(map), maprange, (uintmax_t)base, mapsize);
3223 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3224 printf(", port disabled\n");
3225 else if (type == SYS_RES_MEMORY && !pci_memen(dev))
3226 printf(", memory disabled\n");
3228 printf(", enabled\n");
3232 * If base is 0, then we have problems if this architecture does
3233 * not allow that. It is best to ignore such entries for the
3234 * moment. These will be allocated later if the driver specifically
3235 * requests them. However, some removable buses look better when
3236 * all resources are allocated, so allow '0' to be overriden.
3238 * Similarly treat maps whose values is the same as the test value
3239 * read back. These maps have had all f's written to them by the
3240 * BIOS in an attempt to disable the resources.
3242 if (!force && (basezero || map == testval))
3244 if ((u_long)base != base) {
3246 "pci%d:%d:%d:%d bar %#x too many address bits",
3247 pci_get_domain(dev), pci_get_bus(dev), pci_get_slot(dev),
3248 pci_get_function(dev), reg);
3253 * This code theoretically does the right thing, but has
3254 * undesirable side effects in some cases where peripherals
3255 * respond oddly to having these bits enabled. Let the user
3256 * be able to turn them off (since pci_enable_io_modes is 1 by
3259 if (pci_enable_io_modes) {
3260 /* Turn on resources that have been left off by a lazy BIOS */
3261 if (type == SYS_RES_IOPORT && !pci_porten(dev)) {
3262 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3263 cmd |= PCIM_CMD_PORTEN;
3264 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3266 if (type == SYS_RES_MEMORY && !pci_memen(dev)) {
3267 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
3268 cmd |= PCIM_CMD_MEMEN;
3269 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
3272 if (type == SYS_RES_IOPORT && !pci_porten(dev))
3274 if (type == SYS_RES_MEMORY && !pci_memen(dev))
3278 count = (pci_addr_t)1 << mapsize;
3279 flags = RF_ALIGNMENT_LOG2(mapsize);
3281 flags |= RF_PREFETCHABLE;
3282 if (basezero || base == pci_mapbase(testval) || pci_clear_bars) {
3283 start = 0; /* Let the parent decide. */
3287 end = base + count - 1;
3289 resource_list_add(rl, type, reg, start, end, count);
3292 * Try to allocate the resource for this BAR from our parent
3293 * so that this resource range is already reserved. The
3294 * driver for this device will later inherit this resource in
3295 * pci_alloc_resource().
3297 res = resource_list_reserve(rl, bus, dev, type, ®, start, end, count,
3299 if ((pci_do_realloc_bars
3300 || pci_has_quirk(pci_get_devid(dev), PCI_QUIRK_REALLOC_BAR))
3301 && res == NULL && (start != 0 || end != ~0)) {
3303 * If the allocation fails, try to allocate a resource for
3304 * this BAR using any available range. The firmware felt
3305 * it was important enough to assign a resource, so don't
3306 * disable decoding if we can help it.
3308 resource_list_delete(rl, type, reg);
3309 resource_list_add(rl, type, reg, 0, ~0, count);
3310 res = resource_list_reserve(rl, bus, dev, type, ®, 0, ~0,
3315 * If the allocation fails, delete the resource list entry
3316 * and disable decoding for this device.
3318 * If the driver requests this resource in the future,
3319 * pci_reserve_map() will try to allocate a fresh
3322 resource_list_delete(rl, type, reg);
3323 pci_disable_io(dev, type);
3326 "pci%d:%d:%d:%d bar %#x failed to allocate\n",
3327 pci_get_domain(dev), pci_get_bus(dev),
3328 pci_get_slot(dev), pci_get_function(dev), reg);
3330 start = rman_get_start(res);
3331 pci_write_bar(dev, pm, start);
3337 * For ATA devices we need to decide early what addressing mode to use.
3338 * Legacy demands that the primary and secondary ATA ports sits on the
3339 * same addresses that old ISA hardware did. This dictates that we use
3340 * those addresses and ignore the BAR's if we cannot set PCI native
3344 pci_ata_maps(device_t bus, device_t dev, struct resource_list *rl, int force,
3345 uint32_t prefetchmask)
3347 int rid, type, progif;
3349 /* if this device supports PCI native addressing use it */
3350 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3351 if ((progif & 0x8a) == 0x8a) {
3352 if (pci_mapbase(pci_read_config(dev, PCIR_BAR(0), 4)) &&
3353 pci_mapbase(pci_read_config(dev, PCIR_BAR(2), 4))) {
3354 printf("Trying ATA native PCI addressing mode\n");
3355 pci_write_config(dev, PCIR_PROGIF, progif | 0x05, 1);
3359 progif = pci_read_config(dev, PCIR_PROGIF, 1);
3360 type = SYS_RES_IOPORT;
3361 if (progif & PCIP_STORAGE_IDE_MODEPRIM) {
3362 pci_add_map(bus, dev, PCIR_BAR(0), rl, force,
3363 prefetchmask & (1 << 0));
3364 pci_add_map(bus, dev, PCIR_BAR(1), rl, force,
3365 prefetchmask & (1 << 1));
3368 resource_list_add(rl, type, rid, 0x1f0, 0x1f7, 8);
3369 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x1f0,
3372 resource_list_add(rl, type, rid, 0x3f6, 0x3f6, 1);
3373 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x3f6,
3376 if (progif & PCIP_STORAGE_IDE_MODESEC) {
3377 pci_add_map(bus, dev, PCIR_BAR(2), rl, force,
3378 prefetchmask & (1 << 2));
3379 pci_add_map(bus, dev, PCIR_BAR(3), rl, force,
3380 prefetchmask & (1 << 3));
3383 resource_list_add(rl, type, rid, 0x170, 0x177, 8);
3384 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x170,
3387 resource_list_add(rl, type, rid, 0x376, 0x376, 1);
3388 (void)resource_list_reserve(rl, bus, dev, type, &rid, 0x376,
3391 pci_add_map(bus, dev, PCIR_BAR(4), rl, force,
3392 prefetchmask & (1 << 4));
3393 pci_add_map(bus, dev, PCIR_BAR(5), rl, force,
3394 prefetchmask & (1 << 5));
3398 pci_assign_interrupt(device_t bus, device_t dev, int force_route)
3400 struct pci_devinfo *dinfo = device_get_ivars(dev);
3401 pcicfgregs *cfg = &dinfo->cfg;
3402 char tunable_name[64];
3405 /* Has to have an intpin to have an interrupt. */
3406 if (cfg->intpin == 0)
3409 /* Let the user override the IRQ with a tunable. */
3410 irq = PCI_INVALID_IRQ;
3411 snprintf(tunable_name, sizeof(tunable_name),
3412 "hw.pci%d.%d.%d.INT%c.irq",
3413 cfg->domain, cfg->bus, cfg->slot, cfg->intpin + 'A' - 1);
3414 if (TUNABLE_INT_FETCH(tunable_name, &irq) && (irq >= 255 || irq <= 0))
3415 irq = PCI_INVALID_IRQ;
3418 * If we didn't get an IRQ via the tunable, then we either use the
3419 * IRQ value in the intline register or we ask the bus to route an
3420 * interrupt for us. If force_route is true, then we only use the
3421 * value in the intline register if the bus was unable to assign an
3424 if (!PCI_INTERRUPT_VALID(irq)) {
3425 if (!PCI_INTERRUPT_VALID(cfg->intline) || force_route)
3426 irq = PCI_ASSIGN_INTERRUPT(bus, dev);
3427 if (!PCI_INTERRUPT_VALID(irq))
3431 /* If after all that we don't have an IRQ, just bail. */
3432 if (!PCI_INTERRUPT_VALID(irq))
3435 /* Update the config register if it changed. */
3436 if (irq != cfg->intline) {
3438 pci_write_config(dev, PCIR_INTLINE, irq, 1);
3441 /* Add this IRQ as rid 0 interrupt resource. */
3442 resource_list_add(&dinfo->resources, SYS_RES_IRQ, 0, irq, irq, 1);
3445 /* Perform early OHCI takeover from SMM. */
3447 ohci_early_takeover(device_t self)
3449 struct resource *res;
3455 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3459 ctl = bus_read_4(res, OHCI_CONTROL);
3460 if (ctl & OHCI_IR) {
3462 printf("ohci early: "
3463 "SMM active, request owner change\n");
3464 bus_write_4(res, OHCI_COMMAND_STATUS, OHCI_OCR);
3465 for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) {
3467 ctl = bus_read_4(res, OHCI_CONTROL);
3469 if (ctl & OHCI_IR) {
3471 printf("ohci early: "
3472 "SMM does not respond, resetting\n");
3473 bus_write_4(res, OHCI_CONTROL, OHCI_HCFS_RESET);
3475 /* Disable interrupts */
3476 bus_write_4(res, OHCI_INTERRUPT_DISABLE, OHCI_ALL_INTRS);
3479 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3482 /* Perform early UHCI takeover from SMM. */
3484 uhci_early_takeover(device_t self)
3486 struct resource *res;
3490 * Set the PIRQD enable bit and switch off all the others. We don't
3491 * want legacy support to interfere with us XXX Does this also mean
3492 * that the BIOS won't touch the keyboard anymore if it is connected
3493 * to the ports of the root hub?
3495 pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2);
3497 /* Disable interrupts */
3498 rid = PCI_UHCI_BASE_REG;
3499 res = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE);
3501 bus_write_2(res, UHCI_INTR, 0);
3502 bus_release_resource(self, SYS_RES_IOPORT, rid, res);
3506 /* Perform early EHCI takeover from SMM. */
3508 ehci_early_takeover(device_t self)
3510 struct resource *res;
3520 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3524 cparams = bus_read_4(res, EHCI_HCCPARAMS);
3526 /* Synchronise with the BIOS if it owns the controller. */
3527 for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
3528 eecp = EHCI_EECP_NEXT(eec)) {
3529 eec = pci_read_config(self, eecp, 4);
3530 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
3533 bios_sem = pci_read_config(self, eecp +
3534 EHCI_LEGSUP_BIOS_SEM, 1);
3535 if (bios_sem == 0) {
3539 printf("ehci early: "
3540 "SMM active, request owner change\n");
3542 pci_write_config(self, eecp + EHCI_LEGSUP_OS_SEM, 1, 1);
3544 for (i = 0; (i < 100) && (bios_sem != 0); i++) {
3546 bios_sem = pci_read_config(self, eecp +
3547 EHCI_LEGSUP_BIOS_SEM, 1);
3550 if (bios_sem != 0) {
3552 printf("ehci early: "
3553 "SMM does not respond\n");
3555 /* Disable interrupts */
3556 offs = EHCI_CAPLENGTH(bus_read_4(res, EHCI_CAPLEN_HCIVERSION));
3557 bus_write_4(res, offs + EHCI_USBINTR, 0);
3559 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3562 /* Perform early XHCI takeover from SMM. */
3564 xhci_early_takeover(device_t self)
3566 struct resource *res;
3576 res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
3580 cparams = bus_read_4(res, XHCI_HCSPARAMS0);
3584 /* Synchronise with the BIOS if it owns the controller. */
3585 for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
3586 eecp += XHCI_XECP_NEXT(eec) << 2) {
3587 eec = bus_read_4(res, eecp);
3589 if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
3592 bios_sem = bus_read_1(res, eecp + XHCI_XECP_BIOS_SEM);
3597 printf("xhci early: "
3598 "SMM active, request owner change\n");
3600 bus_write_1(res, eecp + XHCI_XECP_OS_SEM, 1);
3602 /* wait a maximum of 5 second */
3604 for (i = 0; (i < 5000) && (bios_sem != 0); i++) {
3606 bios_sem = bus_read_1(res, eecp +
3607 XHCI_XECP_BIOS_SEM);
3610 if (bios_sem != 0) {
3612 printf("xhci early: "
3613 "SMM does not respond\n");
3616 /* Disable interrupts */
3617 offs = bus_read_1(res, XHCI_CAPLENGTH);
3618 bus_write_4(res, offs + XHCI_USBCMD, 0);
3619 bus_read_4(res, offs + XHCI_USBSTS);
3621 bus_release_resource(self, SYS_RES_MEMORY, rid, res);
3624 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
3626 pci_reserve_secbus(device_t bus, device_t dev, pcicfgregs *cfg,
3627 struct resource_list *rl)
3629 struct resource *res;
3631 rman_res_t start, end, count;
3632 int rid, sec_bus, sec_reg, sub_bus, sub_reg, sup_bus;
3634 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3635 case PCIM_HDRTYPE_BRIDGE:
3636 sec_reg = PCIR_SECBUS_1;
3637 sub_reg = PCIR_SUBBUS_1;
3639 case PCIM_HDRTYPE_CARDBUS:
3640 sec_reg = PCIR_SECBUS_2;
3641 sub_reg = PCIR_SUBBUS_2;
3648 * If the existing bus range is valid, attempt to reserve it
3649 * from our parent. If this fails for any reason, clear the
3650 * secbus and subbus registers.
3652 * XXX: Should we reset sub_bus to sec_bus if it is < sec_bus?
3653 * This would at least preserve the existing sec_bus if it is
3656 sec_bus = PCI_READ_CONFIG(bus, dev, sec_reg, 1);
3657 sub_bus = PCI_READ_CONFIG(bus, dev, sub_reg, 1);
3659 /* Quirk handling. */
3660 switch (pci_get_devid(dev)) {
3661 case 0x12258086: /* Intel 82454KX/GX (Orion) */
3662 sup_bus = pci_read_config(dev, 0x41, 1);
3663 if (sup_bus != 0xff) {
3664 sec_bus = sup_bus + 1;
3665 sub_bus = sup_bus + 1;
3666 PCI_WRITE_CONFIG(bus, dev, sec_reg, sec_bus, 1);
3667 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3672 /* Compaq R3000 BIOS sets wrong subordinate bus number. */
3673 if ((cp = kern_getenv("smbios.planar.maker")) == NULL)
3675 if (strncmp(cp, "Compal", 6) != 0) {
3680 if ((cp = kern_getenv("smbios.planar.product")) == NULL)
3682 if (strncmp(cp, "08A0", 4) != 0) {
3687 if (sub_bus < 0xa) {
3689 PCI_WRITE_CONFIG(bus, dev, sub_reg, sub_bus, 1);
3695 printf("\tsecbus=%d, subbus=%d\n", sec_bus, sub_bus);
3696 if (sec_bus > 0 && sub_bus >= sec_bus) {
3699 count = end - start + 1;
3701 resource_list_add(rl, PCI_RES_BUS, 0, 0, ~0, count);
3704 * If requested, clear secondary bus registers in
3705 * bridge devices to force a complete renumbering
3706 * rather than reserving the existing range. However,
3707 * preserve the existing size.
3709 if (pci_clear_buses)
3713 res = resource_list_reserve(rl, bus, dev, PCI_RES_BUS, &rid,
3714 start, end, count, 0);
3720 "pci%d:%d:%d:%d secbus failed to allocate\n",
3721 pci_get_domain(dev), pci_get_bus(dev),
3722 pci_get_slot(dev), pci_get_function(dev));
3726 PCI_WRITE_CONFIG(bus, dev, sec_reg, 0, 1);
3727 PCI_WRITE_CONFIG(bus, dev, sub_reg, 0, 1);
3730 static struct resource *
3731 pci_alloc_secbus(device_t dev, device_t child, int *rid, rman_res_t start,
3732 rman_res_t end, rman_res_t count, u_int flags)
3734 struct pci_devinfo *dinfo;
3736 struct resource_list *rl;
3737 struct resource *res;
3738 int sec_reg, sub_reg;
3740 dinfo = device_get_ivars(child);
3742 rl = &dinfo->resources;
3743 switch (cfg->hdrtype & PCIM_HDRTYPE) {
3744 case PCIM_HDRTYPE_BRIDGE:
3745 sec_reg = PCIR_SECBUS_1;
3746 sub_reg = PCIR_SUBBUS_1;
3748 case PCIM_HDRTYPE_CARDBUS:
3749 sec_reg = PCIR_SECBUS_2;
3750 sub_reg = PCIR_SUBBUS_2;
3759 if (resource_list_find(rl, PCI_RES_BUS, *rid) == NULL)
3760 resource_list_add(rl, PCI_RES_BUS, *rid, start, end, count);
3761 if (!resource_list_reserved(rl, PCI_RES_BUS, *rid)) {
3762 res = resource_list_reserve(rl, dev, child, PCI_RES_BUS, rid,
3763 start, end, count, flags & ~RF_ACTIVE);
3765 resource_list_delete(rl, PCI_RES_BUS, *rid);
3766 device_printf(child, "allocating %ju bus%s failed\n",
3767 count, count == 1 ? "" : "es");
3771 device_printf(child,
3772 "Lazy allocation of %ju bus%s at %ju\n", count,
3773 count == 1 ? "" : "es", rman_get_start(res));
3774 PCI_WRITE_CONFIG(dev, child, sec_reg, rman_get_start(res), 1);
3775 PCI_WRITE_CONFIG(dev, child, sub_reg, rman_get_end(res), 1);
3777 return (resource_list_alloc(rl, dev, child, PCI_RES_BUS, rid, start,
3778 end, count, flags));
3783 pci_ea_bei_to_rid(device_t dev, int bei)
3786 struct pci_devinfo *dinfo;
3788 struct pcicfg_iov *iov;
3790 dinfo = device_get_ivars(dev);
3791 iov = dinfo->cfg.iov;
3793 iov_pos = iov->iov_pos;
3798 /* Check if matches BAR */
3799 if ((bei >= PCIM_EA_BEI_BAR_0) &&
3800 (bei <= PCIM_EA_BEI_BAR_5))
3801 return (PCIR_BAR(bei));
3804 if (bei == PCIM_EA_BEI_ROM)
3808 /* Check if matches VF_BAR */
3809 if ((iov != NULL) && (bei >= PCIM_EA_BEI_VF_BAR_0) &&
3810 (bei <= PCIM_EA_BEI_VF_BAR_5))
3811 return (PCIR_SRIOV_BAR(bei - PCIM_EA_BEI_VF_BAR_0) +
3819 pci_ea_is_enabled(device_t dev, int rid)
3821 struct pci_ea_entry *ea;
3822 struct pci_devinfo *dinfo;
3824 dinfo = device_get_ivars(dev);
3826 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3827 if (pci_ea_bei_to_rid(dev, ea->eae_bei) == rid)
3828 return ((ea->eae_flags & PCIM_EA_ENABLE) > 0);
3835 pci_add_resources_ea(device_t bus, device_t dev, int alloc_iov)
3837 struct pci_ea_entry *ea;
3838 struct pci_devinfo *dinfo;
3839 pci_addr_t start, end, count;
3840 struct resource_list *rl;
3841 int type, flags, rid;
3842 struct resource *res;
3845 struct pcicfg_iov *iov;
3848 dinfo = device_get_ivars(dev);
3849 rl = &dinfo->resources;
3853 iov = dinfo->cfg.iov;
3856 if (dinfo->cfg.ea.ea_location == 0)
3859 STAILQ_FOREACH(ea, &dinfo->cfg.ea.ea_entries, eae_link) {
3862 * TODO: Ignore EA-BAR if is not enabled.
3863 * Currently the EA implementation supports
3864 * only situation, where EA structure contains
3865 * predefined entries. In case they are not enabled
3866 * leave them unallocated and proceed with
3867 * a legacy-BAR mechanism.
3869 if ((ea->eae_flags & PCIM_EA_ENABLE) == 0)
3872 switch ((ea->eae_flags & PCIM_EA_PP) >> PCIM_EA_PP_OFFSET) {
3873 case PCIM_EA_P_MEM_PREFETCH:
3874 case PCIM_EA_P_VF_MEM_PREFETCH:
3875 flags = RF_PREFETCHABLE;
3877 case PCIM_EA_P_VF_MEM:
3879 type = SYS_RES_MEMORY;
3882 type = SYS_RES_IOPORT;
3888 if (alloc_iov != 0) {
3890 /* Allocating IOV, confirm BEI matches */
3891 if ((ea->eae_bei < PCIM_EA_BEI_VF_BAR_0) ||
3892 (ea->eae_bei > PCIM_EA_BEI_VF_BAR_5))
3898 /* Allocating BAR, confirm BEI matches */
3899 if (((ea->eae_bei < PCIM_EA_BEI_BAR_0) ||
3900 (ea->eae_bei > PCIM_EA_BEI_BAR_5)) &&
3901 (ea->eae_bei != PCIM_EA_BEI_ROM))
3905 rid = pci_ea_bei_to_rid(dev, ea->eae_bei);
3909 /* Skip resources already allocated by EA */
3910 if ((resource_list_find(rl, SYS_RES_MEMORY, rid) != NULL) ||
3911 (resource_list_find(rl, SYS_RES_IOPORT, rid) != NULL))
3914 start = ea->eae_base;
3915 count = ea->eae_max_offset + 1;
3918 count = count * iov->iov_num_vfs;
3920 end = start + count - 1;
3924 resource_list_add(rl, type, rid, start, end, count);
3925 res = resource_list_reserve(rl, bus, dev, type, &rid, start, end, count,
3928 resource_list_delete(rl, type, rid);
3931 * Failed to allocate using EA, disable entry.
3932 * Another attempt to allocation will be performed
3933 * further, but this time using legacy BAR registers
3935 tmp = pci_read_config(dev, ea->eae_cfg_offset, 4);
3936 tmp &= ~PCIM_EA_ENABLE;
3937 pci_write_config(dev, ea->eae_cfg_offset, tmp, 4);
3940 * Disabling entry might fail in case it is hardwired.
3941 * Read flags again to match current status.
3943 ea->eae_flags = pci_read_config(dev, ea->eae_cfg_offset, 4);
3948 /* As per specification, fill BAR with zeros */
3949 pci_write_config(dev, rid, 0, 4);
3954 pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask)
3956 struct pci_devinfo *dinfo;
3958 struct resource_list *rl;
3959 const struct pci_quirk *q;
3963 dinfo = device_get_ivars(dev);
3965 rl = &dinfo->resources;
3966 devid = (cfg->device << 16) | cfg->vendor;
3968 /* Allocate resources using Enhanced Allocation */
3969 pci_add_resources_ea(bus, dev, 0);
3971 /* ATA devices needs special map treatment */
3972 if ((pci_get_class(dev) == PCIC_STORAGE) &&
3973 (pci_get_subclass(dev) == PCIS_STORAGE_IDE) &&
3974 ((pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) ||
3975 (!pci_read_config(dev, PCIR_BAR(0), 4) &&
3976 !pci_read_config(dev, PCIR_BAR(2), 4))) )
3977 pci_ata_maps(bus, dev, rl, force, prefetchmask);
3979 for (i = 0; i < cfg->nummaps;) {
3980 /* Skip resources already managed by EA */
3981 if ((resource_list_find(rl, SYS_RES_MEMORY, PCIR_BAR(i)) != NULL) ||
3982 (resource_list_find(rl, SYS_RES_IOPORT, PCIR_BAR(i)) != NULL) ||
3983 pci_ea_is_enabled(dev, PCIR_BAR(i))) {
3989 * Skip quirked resources.
3991 for (q = &pci_quirks[0]; q->devid != 0; q++)
3992 if (q->devid == devid &&
3993 q->type == PCI_QUIRK_UNMAP_REG &&
3994 q->arg1 == PCIR_BAR(i))
3996 if (q->devid != 0) {
4000 i += pci_add_map(bus, dev, PCIR_BAR(i), rl, force,
4001 prefetchmask & (1 << i));
4005 * Add additional, quirked resources.
4007 for (q = &pci_quirks[0]; q->devid != 0; q++)
4008 if (q->devid == devid && q->type == PCI_QUIRK_MAP_REG)
4009 pci_add_map(bus, dev, q->arg1, rl, force, 0);
4011 if (cfg->intpin > 0 && PCI_INTERRUPT_VALID(cfg->intline)) {
4012 #ifdef __PCI_REROUTE_INTERRUPT
4014 * Try to re-route interrupts. Sometimes the BIOS or
4015 * firmware may leave bogus values in these registers.
4016 * If the re-route fails, then just stick with what we
4019 pci_assign_interrupt(bus, dev, 1);
4021 pci_assign_interrupt(bus, dev, 0);
4025 if (pci_usb_takeover && pci_get_class(dev) == PCIC_SERIALBUS &&
4026 pci_get_subclass(dev) == PCIS_SERIALBUS_USB) {
4027 if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_XHCI)
4028 xhci_early_takeover(dev);
4029 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_EHCI)
4030 ehci_early_takeover(dev);
4031 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_OHCI)
4032 ohci_early_takeover(dev);
4033 else if (pci_get_progif(dev) == PCIP_SERIALBUS_USB_UHCI)
4034 uhci_early_takeover(dev);
4037 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
4039 * Reserve resources for secondary bus ranges behind bridge
4042 pci_reserve_secbus(bus, dev, cfg, rl);
4046 static struct pci_devinfo *
4047 pci_identify_function(device_t pcib, device_t dev, int domain, int busno,
4050 struct pci_devinfo *dinfo;
4052 dinfo = pci_read_device(pcib, dev, domain, busno, slot, func);
4054 pci_add_child(dev, dinfo);
4060 pci_add_children(device_t dev, int domain, int busno)
4062 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4063 device_t pcib = device_get_parent(dev);
4064 struct pci_devinfo *dinfo;
4066 int s, f, pcifunchigh;
4071 * Try to detect a device at slot 0, function 0. If it exists, try to
4072 * enable ARI. We must enable ARI before detecting the rest of the
4073 * functions on this bus as ARI changes the set of slots and functions
4074 * that are legal on this bus.
4076 dinfo = pci_identify_function(pcib, dev, domain, busno, 0, 0);
4077 if (dinfo != NULL && pci_enable_ari)
4078 PCIB_TRY_ENABLE_ARI(pcib, dinfo->cfg.dev);
4081 * Start looking for new devices on slot 0 at function 1 because we
4082 * just identified the device at slot 0, function 0.
4086 maxslots = PCIB_MAXSLOTS(pcib);
4087 for (s = 0; s <= maxslots; s++, first_func = 0) {
4091 hdrtype = REG(PCIR_HDRTYPE, 1);
4092 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4094 if (hdrtype & PCIM_MFDEV)
4095 pcifunchigh = PCIB_MAXFUNCS(pcib);
4096 for (f = first_func; f <= pcifunchigh; f++)
4097 pci_identify_function(pcib, dev, domain, busno, s, f);
4103 pci_rescan_method(device_t dev)
4105 #define REG(n, w) PCIB_READ_CONFIG(pcib, busno, s, f, n, w)
4106 device_t pcib = device_get_parent(dev);
4107 device_t child, *devlist, *unchanged;
4108 int devcount, error, i, j, maxslots, oldcount;
4109 int busno, domain, s, f, pcifunchigh;
4112 /* No need to check for ARI on a rescan. */
4113 error = device_get_children(dev, &devlist, &devcount);
4116 if (devcount != 0) {
4117 unchanged = malloc(devcount * sizeof(device_t), M_TEMP,
4119 if (unchanged == NULL) {
4120 free(devlist, M_TEMP);
4126 domain = pcib_get_domain(dev);
4127 busno = pcib_get_bus(dev);
4128 maxslots = PCIB_MAXSLOTS(pcib);
4129 for (s = 0; s <= maxslots; s++) {
4130 /* If function 0 is not present, skip to the next slot. */
4132 if (REG(PCIR_VENDOR, 2) == 0xffff)
4135 hdrtype = REG(PCIR_HDRTYPE, 1);
4136 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
4138 if (hdrtype & PCIM_MFDEV)
4139 pcifunchigh = PCIB_MAXFUNCS(pcib);
4140 for (f = 0; f <= pcifunchigh; f++) {
4141 if (REG(PCIR_VENDOR, 2) == 0xffff)
4145 * Found a valid function. Check if a
4146 * device_t for this device already exists.
4148 for (i = 0; i < devcount; i++) {
4152 if (pci_get_slot(child) == s &&
4153 pci_get_function(child) == f) {
4154 unchanged[i] = child;
4159 pci_identify_function(pcib, dev, domain, busno, s, f);
4164 /* Remove devices that are no longer present. */
4165 for (i = 0; i < devcount; i++) {
4166 if (unchanged[i] != NULL)
4168 device_delete_child(dev, devlist[i]);
4171 free(devlist, M_TEMP);
4172 oldcount = devcount;
4174 /* Try to attach the devices just added. */
4175 error = device_get_children(dev, &devlist, &devcount);
4177 free(unchanged, M_TEMP);
4181 for (i = 0; i < devcount; i++) {
4182 for (j = 0; j < oldcount; j++) {
4183 if (devlist[i] == unchanged[j])
4187 device_probe_and_attach(devlist[i]);
4191 free(unchanged, M_TEMP);
4192 free(devlist, M_TEMP);
4199 pci_add_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
4202 struct pci_devinfo *vf_dinfo;
4204 int busno, slot, func;
4206 pcib = device_get_parent(bus);
4208 PCIB_DECODE_RID(pcib, rid, &busno, &slot, &func);
4210 vf_dinfo = pci_fill_devinfo(pcib, bus, pci_get_domain(pcib), busno,
4211 slot, func, vid, did);
4213 vf_dinfo->cfg.flags |= PCICFG_VF;
4214 pci_add_child(bus, vf_dinfo);
4216 return (vf_dinfo->cfg.dev);
4220 pci_create_iov_child_method(device_t bus, device_t pf, uint16_t rid,
4221 uint16_t vid, uint16_t did)
4224 return (pci_add_iov_child(bus, pf, rid, vid, did));
4229 pci_add_child_clear_aer(device_t dev, struct pci_devinfo *dinfo)
4235 if (dinfo->cfg.pcie.pcie_location != 0 &&
4236 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT) {
4237 r2 = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4239 r2 &= ~(PCIEM_ROOT_CTL_SERR_CORR |
4240 PCIEM_ROOT_CTL_SERR_NONFATAL | PCIEM_ROOT_CTL_SERR_FATAL);
4241 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4242 PCIER_ROOT_CTL, r2, 2);
4244 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
4245 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
4246 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
4247 if (r != 0 && bootverbose) {
4248 pci_printf(&dinfo->cfg,
4249 "clearing AER UC 0x%08x -> 0x%08x\n",
4250 r, pci_read_config(dev, aer + PCIR_AER_UC_STATUS,
4254 r = pci_read_config(dev, aer + PCIR_AER_UC_MASK, 4);
4255 r &= ~(PCIM_AER_UC_TRAINING_ERROR |
4256 PCIM_AER_UC_DL_PROTOCOL_ERROR |
4257 PCIM_AER_UC_SURPRISE_LINK_DOWN |
4258 PCIM_AER_UC_POISONED_TLP |
4259 PCIM_AER_UC_FC_PROTOCOL_ERROR |
4260 PCIM_AER_UC_COMPLETION_TIMEOUT |
4261 PCIM_AER_UC_COMPLETER_ABORT |
4262 PCIM_AER_UC_UNEXPECTED_COMPLETION |
4263 PCIM_AER_UC_RECEIVER_OVERFLOW |
4264 PCIM_AER_UC_MALFORMED_TLP |
4265 PCIM_AER_UC_ECRC_ERROR |
4266 PCIM_AER_UC_UNSUPPORTED_REQUEST |
4267 PCIM_AER_UC_ACS_VIOLATION |
4268 PCIM_AER_UC_INTERNAL_ERROR |
4269 PCIM_AER_UC_MC_BLOCKED_TLP |
4270 PCIM_AER_UC_ATOMIC_EGRESS_BLK |
4271 PCIM_AER_UC_TLP_PREFIX_BLOCKED);
4272 pci_write_config(dev, aer + PCIR_AER_UC_MASK, r, 4);
4274 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
4275 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
4276 if (r != 0 && bootverbose) {
4277 pci_printf(&dinfo->cfg,
4278 "clearing AER COR 0x%08x -> 0x%08x\n",
4279 r, pci_read_config(dev, aer + PCIR_AER_COR_STATUS,
4283 r = pci_read_config(dev, aer + PCIR_AER_COR_MASK, 4);
4284 r &= ~(PCIM_AER_COR_RECEIVER_ERROR |
4285 PCIM_AER_COR_BAD_TLP |
4286 PCIM_AER_COR_BAD_DLLP |
4287 PCIM_AER_COR_REPLAY_ROLLOVER |
4288 PCIM_AER_COR_REPLAY_TIMEOUT |
4289 PCIM_AER_COR_ADVISORY_NF_ERROR |
4290 PCIM_AER_COR_INTERNAL_ERROR |
4291 PCIM_AER_COR_HEADER_LOG_OVFLOW);
4292 pci_write_config(dev, aer + PCIR_AER_COR_MASK, r, 4);
4294 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
4295 PCIER_DEVICE_CTL, 2);
4296 r |= PCIEM_CTL_COR_ENABLE | PCIEM_CTL_NFER_ENABLE |
4297 PCIEM_CTL_FER_ENABLE | PCIEM_CTL_URR_ENABLE;
4298 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
4299 PCIER_DEVICE_CTL, r, 2);
4304 pci_add_child(device_t bus, struct pci_devinfo *dinfo)
4308 dinfo->cfg.dev = dev = device_add_child(bus, NULL, -1);
4309 device_set_ivars(dev, dinfo);
4310 resource_list_init(&dinfo->resources);
4311 pci_cfg_save(dev, dinfo, 0);
4312 pci_cfg_restore(dev, dinfo);
4313 pci_print_verbose(dinfo);
4314 pci_add_resources(bus, dev, 0, 0);
4315 pci_child_added(dinfo->cfg.dev);
4317 if (pci_clear_aer_on_attach)
4318 pci_add_child_clear_aer(dev, dinfo);
4320 EVENTHANDLER_INVOKE(pci_add_device, dinfo->cfg.dev);
4324 pci_child_added_method(device_t dev, device_t child)
4330 pci_probe(device_t dev)
4333 device_set_desc(dev, "PCI bus");
4335 /* Allow other subclasses to override this driver. */
4336 return (BUS_PROBE_GENERIC);
4340 pci_attach_common(device_t dev)
4342 struct pci_softc *sc;
4348 sc = device_get_softc(dev);
4349 domain = pcib_get_domain(dev);
4350 busno = pcib_get_bus(dev);
4353 sc->sc_bus = bus_alloc_resource(dev, PCI_RES_BUS, &rid, busno, busno,
4355 if (sc->sc_bus == NULL) {
4356 device_printf(dev, "failed to allocate bus number\n");
4361 device_printf(dev, "domain=%d, physical bus=%d\n",
4363 sc->sc_dma_tag = bus_get_dma_tag(dev);
4368 pci_attach(device_t dev)
4370 int busno, domain, error;
4372 error = pci_attach_common(dev);
4377 * Since there can be multiple independently numbered PCI
4378 * buses on systems with multiple PCI domains, we can't use
4379 * the unit number to decide which bus we are probing. We ask
4380 * the parent pcib what our domain and bus numbers are.
4382 domain = pcib_get_domain(dev);
4383 busno = pcib_get_bus(dev);
4384 pci_add_children(dev, domain, busno);
4385 return (bus_generic_attach(dev));
4389 pci_detach(device_t dev)
4392 struct pci_softc *sc;
4396 error = bus_generic_detach(dev);
4400 sc = device_get_softc(dev);
4401 error = bus_release_resource(dev, PCI_RES_BUS, 0, sc->sc_bus);
4405 return (device_delete_children(dev));
4409 pci_hint_device_unit(device_t dev, device_t child, const char *name, int *unitp)
4413 char me1[24], me2[32];
4417 d = pci_get_domain(child);
4418 b = pci_get_bus(child);
4419 s = pci_get_slot(child);
4420 f = pci_get_function(child);
4421 snprintf(me1, sizeof(me1), "pci%u:%u:%u", b, s, f);
4422 snprintf(me2, sizeof(me2), "pci%u:%u:%u:%u", d, b, s, f);
4424 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) {
4425 resource_string_value(name, unit, "at", &at);
4426 if (strcmp(at, me1) != 0 && strcmp(at, me2) != 0)
4427 continue; /* No match, try next candidate */
4434 pci_set_power_child(device_t dev, device_t child, int state)
4440 * Set the device to the given state. If the firmware suggests
4441 * a different power state, use it instead. If power management
4442 * is not present, the firmware is responsible for managing
4443 * device power. Skip children who aren't attached since they
4444 * are handled separately.
4446 pcib = device_get_parent(dev);
4448 if (device_is_attached(child) &&
4449 PCIB_POWER_FOR_SLEEP(pcib, child, &dstate) == 0)
4450 pci_set_powerstate(child, dstate);
4454 pci_suspend_child(device_t dev, device_t child)
4456 struct pci_devinfo *dinfo;
4457 struct resource_list_entry *rle;
4460 dinfo = device_get_ivars(child);
4463 * Save the PCI configuration space for the child and set the
4464 * device in the appropriate power state for this sleep state.
4466 pci_cfg_save(child, dinfo, 0);
4468 /* Suspend devices before potentially powering them down. */
4469 error = bus_generic_suspend_child(dev, child);
4474 if (pci_do_power_suspend) {
4476 * Make sure this device's interrupt handler is not invoked
4477 * in the case the device uses a shared interrupt that can
4478 * be raised by some other device.
4479 * This is applicable only to regular (legacy) PCI interrupts
4480 * as MSI/MSI-X interrupts are never shared.
4482 rle = resource_list_find(&dinfo->resources,
4484 if (rle != NULL && rle->res != NULL)
4485 (void)bus_suspend_intr(child, rle->res);
4486 pci_set_power_child(dev, child, PCI_POWERSTATE_D3);
4493 pci_resume_child(device_t dev, device_t child)
4495 struct pci_devinfo *dinfo;
4496 struct resource_list_entry *rle;
4498 if (pci_do_power_resume)
4499 pci_set_power_child(dev, child, PCI_POWERSTATE_D0);
4501 dinfo = device_get_ivars(child);
4502 pci_cfg_restore(child, dinfo);
4503 if (!device_is_attached(child))
4504 pci_cfg_save(child, dinfo, 1);
4506 bus_generic_resume_child(dev, child);
4509 * Allow interrupts only after fully resuming the driver and hardware.
4511 if (pci_do_power_suspend) {
4512 /* See pci_suspend_child for details. */
4513 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, 0);
4514 if (rle != NULL && rle->res != NULL)
4515 (void)bus_resume_intr(child, rle->res);
4522 pci_resume(device_t dev)
4524 device_t child, *devlist;
4525 int error, i, numdevs;
4527 if ((error = device_get_children(dev, &devlist, &numdevs)) != 0)
4531 * Resume critical devices first, then everything else later.
4533 for (i = 0; i < numdevs; i++) {
4535 switch (pci_get_class(child)) {
4539 case PCIC_BASEPERIPH:
4540 BUS_RESUME_CHILD(dev, child);
4544 for (i = 0; i < numdevs; i++) {
4546 switch (pci_get_class(child)) {
4550 case PCIC_BASEPERIPH:
4553 BUS_RESUME_CHILD(dev, child);
4556 free(devlist, M_TEMP);
4561 pci_load_vendor_data(void)
4567 data = preload_search_by_type("pci_vendor_data");
4569 ptr = preload_fetch_addr(data);
4570 sz = preload_fetch_size(data);
4571 if (ptr != NULL && sz != 0) {
4572 pci_vendordata = ptr;
4573 pci_vendordata_size = sz;
4574 /* terminate the database */
4575 pci_vendordata[pci_vendordata_size] = '\n';
4581 pci_driver_added(device_t dev, driver_t *driver)
4586 struct pci_devinfo *dinfo;
4590 device_printf(dev, "driver added\n");
4591 DEVICE_IDENTIFY(driver, dev);
4592 if (device_get_children(dev, &devlist, &numdevs) != 0)
4594 for (i = 0; i < numdevs; i++) {
4596 if (device_get_state(child) != DS_NOTPRESENT)
4598 dinfo = device_get_ivars(child);
4599 pci_print_verbose(dinfo);
4601 pci_printf(&dinfo->cfg, "reprobing on driver added\n");
4602 pci_cfg_restore(child, dinfo);
4603 if (device_probe_and_attach(child) != 0)
4604 pci_child_detached(dev, child);
4606 free(devlist, M_TEMP);
4610 pci_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
4611 driver_filter_t *filter, driver_intr_t *intr, void *arg, void **cookiep)
4613 struct pci_devinfo *dinfo;
4614 struct msix_table_entry *mte;
4615 struct msix_vector *mv;
4621 error = bus_generic_setup_intr(dev, child, irq, flags, filter, intr,
4626 /* If this is not a direct child, just bail out. */
4627 if (device_get_parent(child) != dev) {
4632 rid = rman_get_rid(irq);
4634 /* Make sure that INTx is enabled */
4635 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4638 * Check to see if the interrupt is MSI or MSI-X.
4639 * Ask our parent to map the MSI and give
4640 * us the address and data register values.
4641 * If we fail for some reason, teardown the
4642 * interrupt handler.
4644 dinfo = device_get_ivars(child);
4645 if (dinfo->cfg.msi.msi_alloc > 0) {
4646 if (dinfo->cfg.msi.msi_addr == 0) {
4647 KASSERT(dinfo->cfg.msi.msi_handlers == 0,
4648 ("MSI has handlers, but vectors not mapped"));
4649 error = PCIB_MAP_MSI(device_get_parent(dev),
4650 child, rman_get_start(irq), &addr, &data);
4653 dinfo->cfg.msi.msi_addr = addr;
4654 dinfo->cfg.msi.msi_data = data;
4656 if (dinfo->cfg.msi.msi_handlers == 0)
4657 pci_enable_msi(child, dinfo->cfg.msi.msi_addr,
4658 dinfo->cfg.msi.msi_data);
4659 dinfo->cfg.msi.msi_handlers++;
4661 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4662 ("No MSI or MSI-X interrupts allocated"));
4663 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4664 ("MSI-X index too high"));
4665 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4666 KASSERT(mte->mte_vector != 0, ("no message vector"));
4667 mv = &dinfo->cfg.msix.msix_vectors[mte->mte_vector - 1];
4668 KASSERT(mv->mv_irq == rman_get_start(irq),
4670 if (mv->mv_address == 0) {
4671 KASSERT(mte->mte_handlers == 0,
4672 ("MSI-X table entry has handlers, but vector not mapped"));
4673 error = PCIB_MAP_MSI(device_get_parent(dev),
4674 child, rman_get_start(irq), &addr, &data);
4677 mv->mv_address = addr;
4682 * The MSIX table entry must be made valid by
4683 * incrementing the mte_handlers before
4684 * calling pci_enable_msix() and
4685 * pci_resume_msix(). Else the MSIX rewrite
4686 * table quirk will not work as expected.
4688 mte->mte_handlers++;
4689 if (mte->mte_handlers == 1) {
4690 pci_enable_msix(child, rid - 1, mv->mv_address,
4692 pci_unmask_msix(child, rid - 1);
4697 * Make sure that INTx is disabled if we are using MSI/MSI-X,
4698 * unless the device is affected by PCI_QUIRK_MSI_INTX_BUG,
4699 * in which case we "enable" INTx so MSI/MSI-X actually works.
4701 if (!pci_has_quirk(pci_get_devid(child),
4702 PCI_QUIRK_MSI_INTX_BUG))
4703 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4705 pci_clear_command_bit(dev, child, PCIM_CMD_INTxDIS);
4708 (void)bus_generic_teardown_intr(dev, child, irq,
4718 pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
4721 struct msix_table_entry *mte;
4722 struct resource_list_entry *rle;
4723 struct pci_devinfo *dinfo;
4726 if (irq == NULL || !(rman_get_flags(irq) & RF_ACTIVE))
4729 /* If this isn't a direct child, just bail out */
4730 if (device_get_parent(child) != dev)
4731 return(bus_generic_teardown_intr(dev, child, irq, cookie));
4733 rid = rman_get_rid(irq);
4736 pci_set_command_bit(dev, child, PCIM_CMD_INTxDIS);
4739 * Check to see if the interrupt is MSI or MSI-X. If so,
4740 * decrement the appropriate handlers count and mask the
4741 * MSI-X message, or disable MSI messages if the count
4744 dinfo = device_get_ivars(child);
4745 rle = resource_list_find(&dinfo->resources, SYS_RES_IRQ, rid);
4746 if (rle->res != irq)
4748 if (dinfo->cfg.msi.msi_alloc > 0) {
4749 KASSERT(rid <= dinfo->cfg.msi.msi_alloc,
4750 ("MSI-X index too high"));
4751 if (dinfo->cfg.msi.msi_handlers == 0)
4753 dinfo->cfg.msi.msi_handlers--;
4754 if (dinfo->cfg.msi.msi_handlers == 0)
4755 pci_disable_msi(child);
4757 KASSERT(dinfo->cfg.msix.msix_alloc > 0,
4758 ("No MSI or MSI-X interrupts allocated"));
4759 KASSERT(rid <= dinfo->cfg.msix.msix_table_len,
4760 ("MSI-X index too high"));
4761 mte = &dinfo->cfg.msix.msix_table[rid - 1];
4762 if (mte->mte_handlers == 0)
4764 mte->mte_handlers--;
4765 if (mte->mte_handlers == 0)
4766 pci_mask_msix(child, rid - 1);
4769 error = bus_generic_teardown_intr(dev, child, irq, cookie);
4772 ("%s: generic teardown failed for MSI/MSI-X", __func__));
4777 pci_print_child(device_t dev, device_t child)
4779 struct pci_devinfo *dinfo;
4780 struct resource_list *rl;
4783 dinfo = device_get_ivars(child);
4784 rl = &dinfo->resources;
4786 retval += bus_print_child_header(dev, child);
4788 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
4789 retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
4790 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
4791 if (device_get_flags(dev))
4792 retval += printf(" flags %#x", device_get_flags(dev));
4794 retval += printf(" at device %d.%d", pci_get_slot(child),
4795 pci_get_function(child));
4797 retval += bus_print_child_domain(dev, child);
4798 retval += bus_print_child_footer(dev, child);
4807 int report; /* 0 = bootverbose, 1 = always */
4809 } pci_nomatch_tab[] = {
4810 {PCIC_OLD, -1, 1, "old"},
4811 {PCIC_OLD, PCIS_OLD_NONVGA, 1, "non-VGA display device"},
4812 {PCIC_OLD, PCIS_OLD_VGA, 1, "VGA-compatible display device"},
4813 {PCIC_STORAGE, -1, 1, "mass storage"},
4814 {PCIC_STORAGE, PCIS_STORAGE_SCSI, 1, "SCSI"},
4815 {PCIC_STORAGE, PCIS_STORAGE_IDE, 1, "ATA"},
4816 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, 1, "floppy disk"},
4817 {PCIC_STORAGE, PCIS_STORAGE_IPI, 1, "IPI"},
4818 {PCIC_STORAGE, PCIS_STORAGE_RAID, 1, "RAID"},
4819 {PCIC_STORAGE, PCIS_STORAGE_ATA_ADMA, 1, "ATA (ADMA)"},
4820 {PCIC_STORAGE, PCIS_STORAGE_SATA, 1, "SATA"},
4821 {PCIC_STORAGE, PCIS_STORAGE_SAS, 1, "SAS"},
4822 {PCIC_STORAGE, PCIS_STORAGE_NVM, 1, "NVM"},
4823 {PCIC_NETWORK, -1, 1, "network"},
4824 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, 1, "ethernet"},
4825 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, 1, "token ring"},
4826 {PCIC_NETWORK, PCIS_NETWORK_FDDI, 1, "fddi"},
4827 {PCIC_NETWORK, PCIS_NETWORK_ATM, 1, "ATM"},
4828 {PCIC_NETWORK, PCIS_NETWORK_ISDN, 1, "ISDN"},
4829 {PCIC_DISPLAY, -1, 1, "display"},
4830 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, 1, "VGA"},
4831 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, 1, "XGA"},
4832 {PCIC_DISPLAY, PCIS_DISPLAY_3D, 1, "3D"},
4833 {PCIC_MULTIMEDIA, -1, 1, "multimedia"},
4834 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, 1, "video"},
4835 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, 1, "audio"},
4836 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_TELE, 1, "telephony"},
4837 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_HDA, 1, "HDA"},
4838 {PCIC_MEMORY, -1, 1, "memory"},
4839 {PCIC_MEMORY, PCIS_MEMORY_RAM, 1, "RAM"},
4840 {PCIC_MEMORY, PCIS_MEMORY_FLASH, 1, "flash"},
4841 {PCIC_BRIDGE, -1, 1, "bridge"},
4842 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, 1, "HOST-PCI"},
4843 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, 1, "PCI-ISA"},
4844 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, 1, "PCI-EISA"},
4845 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, 1, "PCI-MCA"},
4846 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, 1, "PCI-PCI"},
4847 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, 1, "PCI-PCMCIA"},
4848 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, 1, "PCI-NuBus"},
4849 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, 1, "PCI-CardBus"},
4850 {PCIC_BRIDGE, PCIS_BRIDGE_RACEWAY, 1, "PCI-RACEway"},
4851 {PCIC_SIMPLECOMM, -1, 1, "simple comms"},
4852 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, 1, "UART"}, /* could detect 16550 */
4853 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, 1, "parallel port"},
4854 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MULSER, 1, "multiport serial"},
4855 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_MODEM, 1, "generic modem"},
4856 {PCIC_BASEPERIPH, -1, 0, "base peripheral"},
4857 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, 1, "interrupt controller"},
4858 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, 1, "DMA controller"},
4859 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, 1, "timer"},
4860 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, 1, "realtime clock"},
4861 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PCIHOT, 1, "PCI hot-plug controller"},
4862 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_SDHC, 1, "SD host controller"},
4863 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_IOMMU, 1, "IOMMU"},
4864 {PCIC_INPUTDEV, -1, 1, "input device"},
4865 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, 1, "keyboard"},
4866 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,1, "digitizer"},
4867 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, 1, "mouse"},
4868 {PCIC_INPUTDEV, PCIS_INPUTDEV_SCANNER, 1, "scanner"},
4869 {PCIC_INPUTDEV, PCIS_INPUTDEV_GAMEPORT, 1, "gameport"},
4870 {PCIC_DOCKING, -1, 1, "docking station"},
4871 {PCIC_PROCESSOR, -1, 1, "processor"},
4872 {PCIC_SERIALBUS, -1, 1, "serial bus"},
4873 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, 1, "FireWire"},
4874 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, 1, "AccessBus"},
4875 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, 1, "SSA"},
4876 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, 1, "USB"},
4877 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, 1, "Fibre Channel"},
4878 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, 0, "SMBus"},
4879 {PCIC_WIRELESS, -1, 1, "wireless controller"},
4880 {PCIC_WIRELESS, PCIS_WIRELESS_IRDA, 1, "iRDA"},
4881 {PCIC_WIRELESS, PCIS_WIRELESS_IR, 1, "IR"},
4882 {PCIC_WIRELESS, PCIS_WIRELESS_RF, 1, "RF"},
4883 {PCIC_INTELLIIO, -1, 1, "intelligent I/O controller"},
4884 {PCIC_INTELLIIO, PCIS_INTELLIIO_I2O, 1, "I2O"},
4885 {PCIC_SATCOM, -1, 1, "satellite communication"},
4886 {PCIC_SATCOM, PCIS_SATCOM_TV, 1, "sat TV"},
4887 {PCIC_SATCOM, PCIS_SATCOM_AUDIO, 1, "sat audio"},
4888 {PCIC_SATCOM, PCIS_SATCOM_VOICE, 1, "sat voice"},
4889 {PCIC_SATCOM, PCIS_SATCOM_DATA, 1, "sat data"},
4890 {PCIC_CRYPTO, -1, 1, "encrypt/decrypt"},
4891 {PCIC_CRYPTO, PCIS_CRYPTO_NETCOMP, 1, "network/computer crypto"},
4892 {PCIC_CRYPTO, PCIS_CRYPTO_ENTERTAIN, 1, "entertainment crypto"},
4893 {PCIC_DASP, -1, 0, "dasp"},
4894 {PCIC_DASP, PCIS_DASP_DPIO, 1, "DPIO module"},
4895 {PCIC_DASP, PCIS_DASP_PERFCNTRS, 1, "performance counters"},
4896 {PCIC_DASP, PCIS_DASP_COMM_SYNC, 1, "communication synchronizer"},
4897 {PCIC_DASP, PCIS_DASP_MGMT_CARD, 1, "signal processing management"},
4902 pci_probe_nomatch(device_t dev, device_t child)
4905 const char *cp, *scp;
4909 * Look for a listing for this device in a loaded device database.
4912 if ((device = pci_describe_device(child)) != NULL) {
4913 device_printf(dev, "<%s>", device);
4914 free(device, M_DEVBUF);
4917 * Scan the class/subclass descriptions for a general
4922 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
4923 if (pci_nomatch_tab[i].class == pci_get_class(child)) {
4924 if (pci_nomatch_tab[i].subclass == -1) {
4925 cp = pci_nomatch_tab[i].desc;
4926 report = pci_nomatch_tab[i].report;
4927 } else if (pci_nomatch_tab[i].subclass ==
4928 pci_get_subclass(child)) {
4929 scp = pci_nomatch_tab[i].desc;
4930 report = pci_nomatch_tab[i].report;
4934 if (report || bootverbose) {
4935 device_printf(dev, "<%s%s%s>",
4937 ((cp != NULL) && (scp != NULL)) ? ", " : "",
4941 if (report || bootverbose) {
4942 printf(" at device %d.%d (no driver attached)\n",
4943 pci_get_slot(child), pci_get_function(child));
4945 pci_cfg_save(child, device_get_ivars(child), 1);
4949 pci_child_detached(device_t dev, device_t child)
4951 struct pci_devinfo *dinfo;
4952 struct resource_list *rl;
4954 dinfo = device_get_ivars(child);
4955 rl = &dinfo->resources;
4958 * Have to deallocate IRQs before releasing any MSI messages and
4959 * have to release MSI messages before deallocating any memory
4962 if (resource_list_release_active(rl, dev, child, SYS_RES_IRQ) != 0)
4963 pci_printf(&dinfo->cfg, "Device leaked IRQ resources\n");
4964 if (dinfo->cfg.msi.msi_alloc != 0 || dinfo->cfg.msix.msix_alloc != 0) {
4965 pci_printf(&dinfo->cfg, "Device leaked MSI vectors\n");
4966 (void)pci_release_msi(child);
4968 if (resource_list_release_active(rl, dev, child, SYS_RES_MEMORY) != 0)
4969 pci_printf(&dinfo->cfg, "Device leaked memory resources\n");
4970 if (resource_list_release_active(rl, dev, child, SYS_RES_IOPORT) != 0)
4971 pci_printf(&dinfo->cfg, "Device leaked I/O resources\n");
4973 if (resource_list_release_active(rl, dev, child, PCI_RES_BUS) != 0)
4974 pci_printf(&dinfo->cfg, "Device leaked PCI bus numbers\n");
4977 pci_cfg_save(child, dinfo, 1);
4981 * Parse the PCI device database, if loaded, and return a pointer to a
4982 * description of the device.
4984 * The database is flat text formatted as follows:
4986 * Any line not in a valid format is ignored.
4987 * Lines are terminated with newline '\n' characters.
4989 * A VENDOR line consists of the 4 digit (hex) vendor code, a TAB, then
4992 * A DEVICE line is entered immediately below the corresponding VENDOR ID.
4993 * - devices cannot be listed without a corresponding VENDOR line.
4994 * A DEVICE line consists of a TAB, the 4 digit (hex) device code,
4995 * another TAB, then the device name.
4999 * Assuming (ptr) points to the beginning of a line in the database,
5000 * return the vendor or device and description of the next entry.
5001 * The value of (vendor) or (device) inappropriate for the entry type
5002 * is set to -1. Returns nonzero at the end of the database.
5004 * Note that this is slightly unrobust in the face of corrupt data;
5005 * we attempt to safeguard against this by spamming the end of the
5006 * database with a newline when we initialise.
5009 pci_describe_parse_line(char **ptr, int *vendor, int *device, char **desc)
5018 left = pci_vendordata_size - (cp - pci_vendordata);
5026 sscanf(cp, "%x\t%80[^\n]", vendor, *desc) == 2)
5030 sscanf(cp, "%x\t%80[^\n]", device, *desc) == 2)
5033 /* skip to next line */
5034 while (*cp != '\n' && left > 0) {
5043 /* skip to next line */
5044 while (*cp != '\n' && left > 0) {
5048 if (*cp == '\n' && left > 0)
5055 pci_describe_device(device_t dev)
5058 char *desc, *vp, *dp, *line;
5060 desc = vp = dp = NULL;
5063 * If we have no vendor data, we can't do anything.
5065 if (pci_vendordata == NULL)
5069 * Scan the vendor data looking for this device
5071 line = pci_vendordata;
5072 if ((vp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5075 if (pci_describe_parse_line(&line, &vendor, &device, &vp))
5077 if (vendor == pci_get_vendor(dev))
5080 if ((dp = malloc(80, M_DEVBUF, M_NOWAIT)) == NULL)
5083 if (pci_describe_parse_line(&line, &vendor, &device, &dp)) {
5091 if (device == pci_get_device(dev))
5095 snprintf(dp, 80, "0x%x", pci_get_device(dev));
5096 if ((desc = malloc(strlen(vp) + strlen(dp) + 3, M_DEVBUF, M_NOWAIT)) !=
5098 sprintf(desc, "%s, %s", vp, dp);
5108 pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
5110 struct pci_devinfo *dinfo;
5113 dinfo = device_get_ivars(child);
5117 case PCI_IVAR_ETHADDR:
5119 * The generic accessor doesn't deal with failure, so
5120 * we set the return value, then return an error.
5122 *((uint8_t **) result) = NULL;
5124 case PCI_IVAR_SUBVENDOR:
5125 *result = cfg->subvendor;
5127 case PCI_IVAR_SUBDEVICE:
5128 *result = cfg->subdevice;
5130 case PCI_IVAR_VENDOR:
5131 *result = cfg->vendor;
5133 case PCI_IVAR_DEVICE:
5134 *result = cfg->device;
5136 case PCI_IVAR_DEVID:
5137 *result = (cfg->device << 16) | cfg->vendor;
5139 case PCI_IVAR_CLASS:
5140 *result = cfg->baseclass;
5142 case PCI_IVAR_SUBCLASS:
5143 *result = cfg->subclass;
5145 case PCI_IVAR_PROGIF:
5146 *result = cfg->progif;
5148 case PCI_IVAR_REVID:
5149 *result = cfg->revid;
5151 case PCI_IVAR_INTPIN:
5152 *result = cfg->intpin;
5155 *result = cfg->intline;
5157 case PCI_IVAR_DOMAIN:
5158 *result = cfg->domain;
5164 *result = cfg->slot;
5166 case PCI_IVAR_FUNCTION:
5167 *result = cfg->func;
5169 case PCI_IVAR_CMDREG:
5170 *result = cfg->cmdreg;
5172 case PCI_IVAR_CACHELNSZ:
5173 *result = cfg->cachelnsz;
5175 case PCI_IVAR_MINGNT:
5176 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5180 *result = cfg->mingnt;
5182 case PCI_IVAR_MAXLAT:
5183 if (cfg->hdrtype != PCIM_HDRTYPE_NORMAL) {
5187 *result = cfg->maxlat;
5189 case PCI_IVAR_LATTIMER:
5190 *result = cfg->lattimer;
5199 pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
5201 struct pci_devinfo *dinfo;
5203 dinfo = device_get_ivars(child);
5206 case PCI_IVAR_INTPIN:
5207 dinfo->cfg.intpin = value;
5209 case PCI_IVAR_ETHADDR:
5210 case PCI_IVAR_SUBVENDOR:
5211 case PCI_IVAR_SUBDEVICE:
5212 case PCI_IVAR_VENDOR:
5213 case PCI_IVAR_DEVICE:
5214 case PCI_IVAR_DEVID:
5215 case PCI_IVAR_CLASS:
5216 case PCI_IVAR_SUBCLASS:
5217 case PCI_IVAR_PROGIF:
5218 case PCI_IVAR_REVID:
5220 case PCI_IVAR_DOMAIN:
5223 case PCI_IVAR_FUNCTION:
5224 return (EINVAL); /* disallow for now */
5231 #include "opt_ddb.h"
5233 #include <ddb/ddb.h>
5234 #include <sys/cons.h>
5237 * List resources based on pci map registers, used for within ddb
5240 DB_SHOW_COMMAND(pciregs, db_pci_dump)
5242 struct pci_devinfo *dinfo;
5243 struct devlist *devlist_head;
5246 int i, error, none_count;
5249 /* get the head of the device queue */
5250 devlist_head = &pci_devq;
5253 * Go through the list of devices and print out devices
5255 for (error = 0, i = 0,
5256 dinfo = STAILQ_FIRST(devlist_head);
5257 (dinfo != NULL) && (error == 0) && (i < pci_numdevs) && !db_pager_quit;
5258 dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
5260 /* Populate pd_name and pd_unit */
5263 name = device_get_name(dinfo->cfg.dev);
5266 db_printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x "
5267 "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
5268 (name && *name) ? name : "none",
5269 (name && *name) ? (int)device_get_unit(dinfo->cfg.dev) :
5271 p->pc_sel.pc_domain, p->pc_sel.pc_bus, p->pc_sel.pc_dev,
5272 p->pc_sel.pc_func, (p->pc_class << 16) |
5273 (p->pc_subclass << 8) | p->pc_progif,
5274 (p->pc_subdevice << 16) | p->pc_subvendor,
5275 (p->pc_device << 16) | p->pc_vendor,
5276 p->pc_revid, p->pc_hdr);
5281 static struct resource *
5282 pci_reserve_map(device_t dev, device_t child, int type, int *rid,
5283 rman_res_t start, rman_res_t end, rman_res_t count, u_int num,
5286 struct pci_devinfo *dinfo = device_get_ivars(child);
5287 struct resource_list *rl = &dinfo->resources;
5288 struct resource *res;
5291 pci_addr_t map, testval;
5296 /* If rid is managed by EA, ignore it */
5297 if (pci_ea_is_enabled(child, *rid))
5300 pm = pci_find_bar(child, *rid);
5302 /* This is a BAR that we failed to allocate earlier. */
5303 mapsize = pm->pm_size;
5307 * Weed out the bogons, and figure out how large the
5308 * BAR/map is. BARs that read back 0 here are bogus
5309 * and unimplemented. Note: atapci in legacy mode are
5310 * special and handled elsewhere in the code. If you
5311 * have a atapci device in legacy mode and it fails
5312 * here, that other code is broken.
5314 pci_read_bar(child, *rid, &map, &testval, NULL);
5317 * Determine the size of the BAR and ignore BARs with a size
5318 * of 0. Device ROM BARs use a different mask value.
5320 if (PCIR_IS_BIOS(&dinfo->cfg, *rid))
5321 mapsize = pci_romsize(testval);
5323 mapsize = pci_mapsize(testval);
5326 pm = pci_add_bar(child, *rid, map, mapsize);
5329 if (PCI_BAR_MEM(map) || PCIR_IS_BIOS(&dinfo->cfg, *rid)) {
5330 if (type != SYS_RES_MEMORY) {
5333 "child %s requested type %d for rid %#x,"
5334 " but the BAR says it is an memio\n",
5335 device_get_nameunit(child), type, *rid);
5339 if (type != SYS_RES_IOPORT) {
5342 "child %s requested type %d for rid %#x,"
5343 " but the BAR says it is an ioport\n",
5344 device_get_nameunit(child), type, *rid);
5350 * For real BARs, we need to override the size that
5351 * the driver requests, because that's what the BAR
5352 * actually uses and we would otherwise have a
5353 * situation where we might allocate the excess to
5354 * another driver, which won't work.
5356 count = ((pci_addr_t)1 << mapsize) * num;
5357 if (RF_ALIGNMENT(flags) < mapsize)
5358 flags = (flags & ~RF_ALIGNMENT_MASK) | RF_ALIGNMENT_LOG2(mapsize);
5359 if (PCI_BAR_MEM(map) && (map & PCIM_BAR_MEM_PREFETCH))
5360 flags |= RF_PREFETCHABLE;
5363 * Allocate enough resource, and then write back the
5364 * appropriate BAR for that resource.
5366 resource_list_add(rl, type, *rid, start, end, count);
5367 res = resource_list_reserve(rl, dev, child, type, rid, start, end,
5368 count, flags & ~RF_ACTIVE);
5370 resource_list_delete(rl, type, *rid);
5371 device_printf(child,
5372 "%#jx bytes of rid %#x res %d failed (%#jx, %#jx).\n",
5373 count, *rid, type, start, end);
5377 device_printf(child,
5378 "Lazy allocation of %#jx bytes rid %#x type %d at %#jx\n",
5379 count, *rid, type, rman_get_start(res));
5381 /* Disable decoding via the CMD register before updating the BAR */
5382 cmd = pci_read_config(child, PCIR_COMMAND, 2);
5383 pci_write_config(child, PCIR_COMMAND,
5384 cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
5386 map = rman_get_start(res);
5387 pci_write_bar(child, pm, map);
5389 /* Restore the original value of the CMD register */
5390 pci_write_config(child, PCIR_COMMAND, cmd, 2);
5396 pci_alloc_multi_resource(device_t dev, device_t child, int type, int *rid,
5397 rman_res_t start, rman_res_t end, rman_res_t count, u_long num,
5400 struct pci_devinfo *dinfo;
5401 struct resource_list *rl;
5402 struct resource_list_entry *rle;
5403 struct resource *res;
5407 * Perform lazy resource allocation
5409 dinfo = device_get_ivars(child);
5410 rl = &dinfo->resources;
5413 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
5415 return (pci_alloc_secbus(dev, child, rid, start, end, count,
5420 * Can't alloc legacy interrupt once MSI messages have
5423 if (*rid == 0 && (cfg->msi.msi_alloc > 0 ||
5424 cfg->msix.msix_alloc > 0))
5428 * If the child device doesn't have an interrupt
5429 * routed and is deserving of an interrupt, try to
5432 if (*rid == 0 && !PCI_INTERRUPT_VALID(cfg->intline) &&
5434 pci_assign_interrupt(dev, child, 0);
5436 case SYS_RES_IOPORT:
5437 case SYS_RES_MEMORY:
5440 * PCI-PCI bridge I/O window resources are not BARs.
5441 * For those allocations just pass the request up the
5444 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE) {
5446 case PCIR_IOBASEL_1:
5447 case PCIR_MEMBASE_1:
5448 case PCIR_PMBASEL_1:
5450 * XXX: Should we bother creating a resource
5453 return (bus_generic_alloc_resource(dev, child,
5454 type, rid, start, end, count, flags));
5458 /* Reserve resources for this BAR if needed. */
5459 rle = resource_list_find(rl, type, *rid);
5461 res = pci_reserve_map(dev, child, type, rid, start, end,
5467 return (resource_list_alloc(rl, dev, child, type, rid,
5468 start, end, count, flags));
5472 pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
5473 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
5476 struct pci_devinfo *dinfo;
5479 if (device_get_parent(child) != dev)
5480 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
5481 type, rid, start, end, count, flags));
5484 dinfo = device_get_ivars(child);
5485 if (dinfo->cfg.flags & PCICFG_VF) {
5487 /* VFs can't have I/O BARs. */
5488 case SYS_RES_IOPORT:
5490 case SYS_RES_MEMORY:
5491 return (pci_vf_alloc_mem_resource(dev, child, rid,
5492 start, end, count, flags));
5495 /* Fall through for other types of resource allocations. */
5499 return (pci_alloc_multi_resource(dev, child, type, rid, start, end,
5504 pci_release_resource(device_t dev, device_t child, int type, int rid,
5507 struct pci_devinfo *dinfo;
5508 struct resource_list *rl;
5511 if (device_get_parent(child) != dev)
5512 return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
5515 dinfo = device_get_ivars(child);
5519 if (dinfo->cfg.flags & PCICFG_VF) {
5521 /* VFs can't have I/O BARs. */
5522 case SYS_RES_IOPORT:
5524 case SYS_RES_MEMORY:
5525 return (pci_vf_release_mem_resource(dev, child, rid,
5529 /* Fall through for other types of resource allocations. */
5535 * PCI-PCI bridge I/O window resources are not BARs. For
5536 * those allocations just pass the request up the tree.
5538 if (cfg->hdrtype == PCIM_HDRTYPE_BRIDGE &&
5539 (type == SYS_RES_IOPORT || type == SYS_RES_MEMORY)) {
5541 case PCIR_IOBASEL_1:
5542 case PCIR_MEMBASE_1:
5543 case PCIR_PMBASEL_1:
5544 return (bus_generic_release_resource(dev, child, type,
5550 rl = &dinfo->resources;
5551 return (resource_list_release(rl, dev, child, type, rid, r));
5555 pci_activate_resource(device_t dev, device_t child, int type, int rid,
5558 struct pci_devinfo *dinfo;
5561 error = bus_generic_activate_resource(dev, child, type, rid, r);
5565 /* Enable decoding in the command register when activating BARs. */
5566 if (device_get_parent(child) == dev) {
5567 /* Device ROMs need their decoding explicitly enabled. */
5568 dinfo = device_get_ivars(child);
5569 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5570 pci_write_bar(child, pci_find_bar(child, rid),
5571 rman_get_start(r) | PCIM_BIOS_ENABLE);
5573 case SYS_RES_IOPORT:
5574 case SYS_RES_MEMORY:
5575 error = PCI_ENABLE_IO(dev, child, type);
5583 pci_deactivate_resource(device_t dev, device_t child, int type,
5584 int rid, struct resource *r)
5586 struct pci_devinfo *dinfo;
5589 error = bus_generic_deactivate_resource(dev, child, type, rid, r);
5593 /* Disable decoding for device ROMs. */
5594 if (device_get_parent(child) == dev) {
5595 dinfo = device_get_ivars(child);
5596 if (type == SYS_RES_MEMORY && PCIR_IS_BIOS(&dinfo->cfg, rid))
5597 pci_write_bar(child, pci_find_bar(child, rid),
5604 pci_child_deleted(device_t dev, device_t child)
5606 struct resource_list_entry *rle;
5607 struct resource_list *rl;
5608 struct pci_devinfo *dinfo;
5610 dinfo = device_get_ivars(child);
5611 rl = &dinfo->resources;
5613 EVENTHANDLER_INVOKE(pci_delete_device, child);
5615 /* Turn off access to resources we're about to free */
5616 if (bus_child_present(child) != 0) {
5617 pci_write_config(child, PCIR_COMMAND, pci_read_config(child,
5618 PCIR_COMMAND, 2) & ~(PCIM_CMD_MEMEN | PCIM_CMD_PORTEN), 2);
5620 pci_disable_busmaster(child);
5623 /* Free all allocated resources */
5624 STAILQ_FOREACH(rle, rl, link) {
5626 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5627 resource_list_busy(rl, rle->type, rle->rid)) {
5628 pci_printf(&dinfo->cfg,
5629 "Resource still owned, oops. "
5630 "(type=%d, rid=%d, addr=%lx)\n",
5631 rle->type, rle->rid,
5632 rman_get_start(rle->res));
5633 bus_release_resource(child, rle->type, rle->rid,
5636 resource_list_unreserve(rl, dev, child, rle->type,
5640 resource_list_free(rl);
5646 pci_delete_resource(device_t dev, device_t child, int type, int rid)
5648 struct pci_devinfo *dinfo;
5649 struct resource_list *rl;
5650 struct resource_list_entry *rle;
5652 if (device_get_parent(child) != dev)
5655 dinfo = device_get_ivars(child);
5656 rl = &dinfo->resources;
5657 rle = resource_list_find(rl, type, rid);
5662 if (rman_get_flags(rle->res) & RF_ACTIVE ||
5663 resource_list_busy(rl, type, rid)) {
5664 device_printf(dev, "delete_resource: "
5665 "Resource still owned by child, oops. "
5666 "(type=%d, rid=%d, addr=%jx)\n",
5667 type, rid, rman_get_start(rle->res));
5670 resource_list_unreserve(rl, dev, child, type, rid);
5672 resource_list_delete(rl, type, rid);
5675 struct resource_list *
5676 pci_get_resource_list (device_t dev, device_t child)
5678 struct pci_devinfo *dinfo = device_get_ivars(child);
5680 return (&dinfo->resources);
5684 bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
5686 pci_get_dma_tag(device_t bus, device_t dev)
5689 struct pci_softc *sc;
5691 if (device_get_parent(dev) == bus) {
5692 /* try dmar and return if it works */
5693 tag = dmar_get_dma_tag(bus, dev);
5697 sc = device_get_softc(bus);
5698 tag = sc->sc_dma_tag;
5704 pci_get_dma_tag(device_t bus, device_t dev)
5706 struct pci_softc *sc = device_get_softc(bus);
5708 return (sc->sc_dma_tag);
5713 pci_read_config_method(device_t dev, device_t child, int reg, int width)
5715 struct pci_devinfo *dinfo = device_get_ivars(child);
5716 pcicfgregs *cfg = &dinfo->cfg;
5720 * SR-IOV VFs don't implement the VID or DID registers, so we have to
5721 * emulate them here.
5723 if (cfg->flags & PCICFG_VF) {
5724 if (reg == PCIR_VENDOR) {
5727 return (cfg->device << 16 | cfg->vendor);
5729 return (cfg->vendor);
5731 return (cfg->vendor & 0xff);
5733 return (0xffffffff);
5735 } else if (reg == PCIR_DEVICE) {
5737 /* Note that an unaligned 4-byte read is an error. */
5739 return (cfg->device);
5741 return (cfg->device & 0xff);
5743 return (0xffffffff);
5749 return (PCIB_READ_CONFIG(device_get_parent(dev),
5750 cfg->bus, cfg->slot, cfg->func, reg, width));
5754 pci_write_config_method(device_t dev, device_t child, int reg,
5755 uint32_t val, int width)
5757 struct pci_devinfo *dinfo = device_get_ivars(child);
5758 pcicfgregs *cfg = &dinfo->cfg;
5760 PCIB_WRITE_CONFIG(device_get_parent(dev),
5761 cfg->bus, cfg->slot, cfg->func, reg, val, width);
5765 pci_child_location_str_method(device_t dev, device_t child, char *buf,
5769 snprintf(buf, buflen, "slot=%d function=%d dbsf=pci%d:%d:%d:%d",
5770 pci_get_slot(child), pci_get_function(child), pci_get_domain(child),
5771 pci_get_bus(child), pci_get_slot(child), pci_get_function(child));
5776 pci_child_pnpinfo_str_method(device_t dev, device_t child, char *buf,
5779 struct pci_devinfo *dinfo;
5782 dinfo = device_get_ivars(child);
5784 snprintf(buf, buflen, "vendor=0x%04x device=0x%04x subvendor=0x%04x "
5785 "subdevice=0x%04x class=0x%02x%02x%02x", cfg->vendor, cfg->device,
5786 cfg->subvendor, cfg->subdevice, cfg->baseclass, cfg->subclass,
5792 pci_assign_interrupt_method(device_t dev, device_t child)
5794 struct pci_devinfo *dinfo = device_get_ivars(child);
5795 pcicfgregs *cfg = &dinfo->cfg;
5797 return (PCIB_ROUTE_INTERRUPT(device_get_parent(dev), child,
5802 pci_lookup(void *arg, const char *name, device_t *dev)
5806 int domain, bus, slot, func;
5812 * Accept pciconf-style selectors of either pciD:B:S:F or
5813 * pciB:S:F. In the latter case, the domain is assumed to
5816 if (strncmp(name, "pci", 3) != 0)
5818 val = strtol(name + 3, &end, 10);
5819 if (val < 0 || val > INT_MAX || *end != ':')
5822 val = strtol(end + 1, &end, 10);
5823 if (val < 0 || val > INT_MAX || *end != ':')
5826 val = strtol(end + 1, &end, 10);
5827 if (val < 0 || val > INT_MAX)
5831 val = strtol(end + 1, &end, 10);
5832 if (val < 0 || val > INT_MAX || *end != '\0')
5835 } else if (*end == '\0') {
5843 if (domain > PCI_DOMAINMAX || bus > PCI_BUSMAX || slot > PCI_SLOTMAX ||
5844 func > PCIE_ARI_FUNCMAX || (slot != 0 && func > PCI_FUNCMAX))
5847 *dev = pci_find_dbsf(domain, bus, slot, func);
5851 pci_modevent(module_t mod, int what, void *arg)
5853 static struct cdev *pci_cdev;
5854 static eventhandler_tag tag;
5858 STAILQ_INIT(&pci_devq);
5860 pci_cdev = make_dev(&pcicdev, 0, UID_ROOT, GID_WHEEL, 0644,
5862 pci_load_vendor_data();
5863 tag = EVENTHANDLER_REGISTER(dev_lookup, pci_lookup, NULL,
5869 EVENTHANDLER_DEREGISTER(dev_lookup, tag);
5870 destroy_dev(pci_cdev);
5878 pci_cfg_restore_pcie(device_t dev, struct pci_devinfo *dinfo)
5880 #define WREG(n, v) pci_write_config(dev, pos + (n), (v), 2)
5881 struct pcicfg_pcie *cfg;
5884 cfg = &dinfo->cfg.pcie;
5885 pos = cfg->pcie_location;
5887 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
5889 WREG(PCIER_DEVICE_CTL, cfg->pcie_device_ctl);
5891 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5892 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
5893 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
5894 WREG(PCIER_LINK_CTL, cfg->pcie_link_ctl);
5896 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5897 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
5898 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
5899 WREG(PCIER_SLOT_CTL, cfg->pcie_slot_ctl);
5901 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
5902 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
5903 WREG(PCIER_ROOT_CTL, cfg->pcie_root_ctl);
5906 WREG(PCIER_DEVICE_CTL2, cfg->pcie_device_ctl2);
5907 WREG(PCIER_LINK_CTL2, cfg->pcie_link_ctl2);
5908 WREG(PCIER_SLOT_CTL2, cfg->pcie_slot_ctl2);
5914 pci_cfg_restore_pcix(device_t dev, struct pci_devinfo *dinfo)
5916 pci_write_config(dev, dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND,
5917 dinfo->cfg.pcix.pcix_command, 2);
5921 pci_cfg_restore(device_t dev, struct pci_devinfo *dinfo)
5925 * Restore the device to full power mode. We must do this
5926 * before we restore the registers because moving from D3 to
5927 * D0 will cause the chip's BARs and some other registers to
5928 * be reset to some unknown power on reset values. Cut down
5929 * the noise on boot by doing nothing if we are already in
5932 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0)
5933 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
5934 pci_write_config(dev, PCIR_COMMAND, dinfo->cfg.cmdreg, 2);
5935 pci_write_config(dev, PCIR_INTLINE, dinfo->cfg.intline, 1);
5936 pci_write_config(dev, PCIR_INTPIN, dinfo->cfg.intpin, 1);
5937 pci_write_config(dev, PCIR_CACHELNSZ, dinfo->cfg.cachelnsz, 1);
5938 pci_write_config(dev, PCIR_LATTIMER, dinfo->cfg.lattimer, 1);
5939 pci_write_config(dev, PCIR_PROGIF, dinfo->cfg.progif, 1);
5940 pci_write_config(dev, PCIR_REVID, dinfo->cfg.revid, 1);
5941 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
5942 case PCIM_HDRTYPE_NORMAL:
5943 pci_write_config(dev, PCIR_MINGNT, dinfo->cfg.mingnt, 1);
5944 pci_write_config(dev, PCIR_MAXLAT, dinfo->cfg.maxlat, 1);
5946 case PCIM_HDRTYPE_BRIDGE:
5947 pci_write_config(dev, PCIR_SECLAT_1,
5948 dinfo->cfg.bridge.br_seclat, 1);
5949 pci_write_config(dev, PCIR_SUBBUS_1,
5950 dinfo->cfg.bridge.br_subbus, 1);
5951 pci_write_config(dev, PCIR_SECBUS_1,
5952 dinfo->cfg.bridge.br_secbus, 1);
5953 pci_write_config(dev, PCIR_PRIBUS_1,
5954 dinfo->cfg.bridge.br_pribus, 1);
5955 pci_write_config(dev, PCIR_BRIDGECTL_1,
5956 dinfo->cfg.bridge.br_control, 2);
5958 case PCIM_HDRTYPE_CARDBUS:
5959 pci_write_config(dev, PCIR_SECLAT_2,
5960 dinfo->cfg.bridge.br_seclat, 1);
5961 pci_write_config(dev, PCIR_SUBBUS_2,
5962 dinfo->cfg.bridge.br_subbus, 1);
5963 pci_write_config(dev, PCIR_SECBUS_2,
5964 dinfo->cfg.bridge.br_secbus, 1);
5965 pci_write_config(dev, PCIR_PRIBUS_2,
5966 dinfo->cfg.bridge.br_pribus, 1);
5967 pci_write_config(dev, PCIR_BRIDGECTL_2,
5968 dinfo->cfg.bridge.br_control, 2);
5971 pci_restore_bars(dev);
5974 * Restore extended capabilities for PCI-Express and PCI-X
5976 if (dinfo->cfg.pcie.pcie_location != 0)
5977 pci_cfg_restore_pcie(dev, dinfo);
5978 if (dinfo->cfg.pcix.pcix_location != 0)
5979 pci_cfg_restore_pcix(dev, dinfo);
5981 /* Restore MSI and MSI-X configurations if they are present. */
5982 if (dinfo->cfg.msi.msi_location != 0)
5983 pci_resume_msi(dev);
5984 if (dinfo->cfg.msix.msix_location != 0)
5985 pci_resume_msix(dev);
5988 if (dinfo->cfg.iov != NULL)
5989 pci_iov_cfg_restore(dev, dinfo);
5994 pci_cfg_save_pcie(device_t dev, struct pci_devinfo *dinfo)
5996 #define RREG(n) pci_read_config(dev, pos + (n), 2)
5997 struct pcicfg_pcie *cfg;
6000 cfg = &dinfo->cfg.pcie;
6001 pos = cfg->pcie_location;
6003 cfg->pcie_flags = RREG(PCIER_FLAGS);
6005 version = cfg->pcie_flags & PCIEM_FLAGS_VERSION;
6007 cfg->pcie_device_ctl = RREG(PCIER_DEVICE_CTL);
6009 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6010 cfg->pcie_type == PCIEM_TYPE_ENDPOINT ||
6011 cfg->pcie_type == PCIEM_TYPE_LEGACY_ENDPOINT)
6012 cfg->pcie_link_ctl = RREG(PCIER_LINK_CTL);
6014 if (version > 1 || (cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6015 (cfg->pcie_type == PCIEM_TYPE_DOWNSTREAM_PORT &&
6016 (cfg->pcie_flags & PCIEM_FLAGS_SLOT))))
6017 cfg->pcie_slot_ctl = RREG(PCIER_SLOT_CTL);
6019 if (version > 1 || cfg->pcie_type == PCIEM_TYPE_ROOT_PORT ||
6020 cfg->pcie_type == PCIEM_TYPE_ROOT_EC)
6021 cfg->pcie_root_ctl = RREG(PCIER_ROOT_CTL);
6024 cfg->pcie_device_ctl2 = RREG(PCIER_DEVICE_CTL2);
6025 cfg->pcie_link_ctl2 = RREG(PCIER_LINK_CTL2);
6026 cfg->pcie_slot_ctl2 = RREG(PCIER_SLOT_CTL2);
6032 pci_cfg_save_pcix(device_t dev, struct pci_devinfo *dinfo)
6034 dinfo->cfg.pcix.pcix_command = pci_read_config(dev,
6035 dinfo->cfg.pcix.pcix_location + PCIXR_COMMAND, 2);
6039 pci_cfg_save(device_t dev, struct pci_devinfo *dinfo, int setstate)
6045 * Some drivers apparently write to these registers w/o updating our
6046 * cached copy. No harm happens if we update the copy, so do so here
6047 * so we can restore them. The COMMAND register is modified by the
6048 * bus w/o updating the cache. This should represent the normally
6049 * writable portion of the 'defined' part of type 0/1/2 headers.
6051 dinfo->cfg.vendor = pci_read_config(dev, PCIR_VENDOR, 2);
6052 dinfo->cfg.device = pci_read_config(dev, PCIR_DEVICE, 2);
6053 dinfo->cfg.cmdreg = pci_read_config(dev, PCIR_COMMAND, 2);
6054 dinfo->cfg.intline = pci_read_config(dev, PCIR_INTLINE, 1);
6055 dinfo->cfg.intpin = pci_read_config(dev, PCIR_INTPIN, 1);
6056 dinfo->cfg.cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
6057 dinfo->cfg.lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
6058 dinfo->cfg.baseclass = pci_read_config(dev, PCIR_CLASS, 1);
6059 dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1);
6060 dinfo->cfg.progif = pci_read_config(dev, PCIR_PROGIF, 1);
6061 dinfo->cfg.revid = pci_read_config(dev, PCIR_REVID, 1);
6062 switch (dinfo->cfg.hdrtype & PCIM_HDRTYPE) {
6063 case PCIM_HDRTYPE_NORMAL:
6064 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_0, 2);
6065 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_0, 2);
6066 dinfo->cfg.mingnt = pci_read_config(dev, PCIR_MINGNT, 1);
6067 dinfo->cfg.maxlat = pci_read_config(dev, PCIR_MAXLAT, 1);
6069 case PCIM_HDRTYPE_BRIDGE:
6070 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6072 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6074 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6076 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6078 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6079 PCIR_BRIDGECTL_1, 2);
6081 case PCIM_HDRTYPE_CARDBUS:
6082 dinfo->cfg.bridge.br_seclat = pci_read_config(dev,
6084 dinfo->cfg.bridge.br_subbus = pci_read_config(dev,
6086 dinfo->cfg.bridge.br_secbus = pci_read_config(dev,
6088 dinfo->cfg.bridge.br_pribus = pci_read_config(dev,
6090 dinfo->cfg.bridge.br_control = pci_read_config(dev,
6091 PCIR_BRIDGECTL_2, 2);
6092 dinfo->cfg.subvendor = pci_read_config(dev, PCIR_SUBVEND_2, 2);
6093 dinfo->cfg.subdevice = pci_read_config(dev, PCIR_SUBDEV_2, 2);
6097 if (dinfo->cfg.pcie.pcie_location != 0)
6098 pci_cfg_save_pcie(dev, dinfo);
6100 if (dinfo->cfg.pcix.pcix_location != 0)
6101 pci_cfg_save_pcix(dev, dinfo);
6104 if (dinfo->cfg.iov != NULL)
6105 pci_iov_cfg_save(dev, dinfo);
6109 * don't set the state for display devices, base peripherals and
6110 * memory devices since bad things happen when they are powered down.
6111 * We should (a) have drivers that can easily detach and (b) use
6112 * generic drivers for these devices so that some device actually
6113 * attaches. We need to make sure that when we implement (a) we don't
6114 * power the device down on a reattach.
6116 cls = pci_get_class(dev);
6119 switch (pci_do_power_nodriver)
6121 case 0: /* NO powerdown at all */
6123 case 1: /* Conservative about what to power down */
6124 if (cls == PCIC_STORAGE)
6127 case 2: /* Aggressive about what to power down */
6128 if (cls == PCIC_DISPLAY || cls == PCIC_MEMORY ||
6129 cls == PCIC_BASEPERIPH)
6132 case 3: /* Power down everything */
6136 * PCI spec says we can only go into D3 state from D0 state.
6137 * Transition from D[12] into D0 before going to D3 state.
6139 ps = pci_get_powerstate(dev);
6140 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6141 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6142 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3)
6143 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6146 /* Wrapper APIs suitable for device driver use. */
6148 pci_save_state(device_t dev)
6150 struct pci_devinfo *dinfo;
6152 dinfo = device_get_ivars(dev);
6153 pci_cfg_save(dev, dinfo, 0);
6157 pci_restore_state(device_t dev)
6159 struct pci_devinfo *dinfo;
6161 dinfo = device_get_ivars(dev);
6162 pci_cfg_restore(dev, dinfo);
6166 pci_get_id_method(device_t dev, device_t child, enum pci_id_type type,
6170 return (PCIB_GET_ID(device_get_parent(dev), child, type, id));
6173 /* Find the upstream port of a given PCI device in a root complex. */
6175 pci_find_pcie_root_port(device_t dev)
6177 struct pci_devinfo *dinfo;
6178 devclass_t pci_class;
6181 pci_class = devclass_find("pci");
6182 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class,
6183 ("%s: non-pci device %s", __func__, device_get_nameunit(dev)));
6186 * Walk the bridge hierarchy until we find a PCI-e root
6187 * port or a non-PCI device.
6190 bus = device_get_parent(dev);
6191 KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
6192 device_get_nameunit(dev)));
6194 pcib = device_get_parent(bus);
6195 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
6196 device_get_nameunit(bus)));
6199 * pcib's parent must be a PCI bus for this to be a
6202 if (device_get_devclass(device_get_parent(pcib)) != pci_class)
6205 dinfo = device_get_ivars(pcib);
6206 if (dinfo->cfg.pcie.pcie_location != 0 &&
6207 dinfo->cfg.pcie.pcie_type == PCIEM_TYPE_ROOT_PORT)
6215 * Wait for pending transactions to complete on a PCI-express function.
6217 * The maximum delay is specified in milliseconds in max_delay. Note
6218 * that this function may sleep.
6220 * Returns true if the function is idle and false if the timeout is
6221 * exceeded. If dev is not a PCI-express function, this returns true.
6224 pcie_wait_for_pending_transactions(device_t dev, u_int max_delay)
6226 struct pci_devinfo *dinfo = device_get_ivars(dev);
6230 cap = dinfo->cfg.pcie.pcie_location;
6234 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6235 while (sta & PCIEM_STA_TRANSACTION_PND) {
6239 /* Poll once every 100 milliseconds up to the timeout. */
6240 if (max_delay > 100) {
6241 pause_sbt("pcietp", 100 * SBT_1MS, 0, C_HARDCLOCK);
6244 pause_sbt("pcietp", max_delay * SBT_1MS, 0,
6248 sta = pci_read_config(dev, cap + PCIER_DEVICE_STA, 2);
6255 * Determine the maximum Completion Timeout in microseconds.
6257 * For non-PCI-express functions this returns 0.
6260 pcie_get_max_completion_timeout(device_t dev)
6262 struct pci_devinfo *dinfo = device_get_ivars(dev);
6265 cap = dinfo->cfg.pcie.pcie_location;
6270 * Functions using the 1.x spec use the default timeout range of
6271 * 50 microseconds to 50 milliseconds. Functions that do not
6272 * support programmable timeouts also use this range.
6274 if ((dinfo->cfg.pcie.pcie_flags & PCIEM_FLAGS_VERSION) < 2 ||
6275 (pci_read_config(dev, cap + PCIER_DEVICE_CAP2, 4) &
6276 PCIEM_CAP2_COMP_TIMO_RANGES) == 0)
6279 switch (pci_read_config(dev, cap + PCIER_DEVICE_CTL2, 2) &
6280 PCIEM_CTL2_COMP_TIMO_VAL) {
6281 case PCIEM_CTL2_COMP_TIMO_100US:
6283 case PCIEM_CTL2_COMP_TIMO_10MS:
6285 case PCIEM_CTL2_COMP_TIMO_55MS:
6287 case PCIEM_CTL2_COMP_TIMO_210MS:
6288 return (210 * 1000);
6289 case PCIEM_CTL2_COMP_TIMO_900MS:
6290 return (900 * 1000);
6291 case PCIEM_CTL2_COMP_TIMO_3500MS:
6292 return (3500 * 1000);
6293 case PCIEM_CTL2_COMP_TIMO_13S:
6294 return (13 * 1000 * 1000);
6295 case PCIEM_CTL2_COMP_TIMO_64S:
6296 return (64 * 1000 * 1000);
6303 * Perform a Function Level Reset (FLR) on a device.
6305 * This function first waits for any pending transactions to complete
6306 * within the timeout specified by max_delay. If transactions are
6307 * still pending, the function will return false without attempting a
6310 * If dev is not a PCI-express function or does not support FLR, this
6311 * function returns false.
6313 * Note that no registers are saved or restored. The caller is
6314 * responsible for saving and restoring any registers including
6315 * PCI-standard registers via pci_save_state() and
6316 * pci_restore_state().
6319 pcie_flr(device_t dev, u_int max_delay, bool force)
6321 struct pci_devinfo *dinfo = device_get_ivars(dev);
6326 cap = dinfo->cfg.pcie.pcie_location;
6330 if (!(pci_read_config(dev, cap + PCIER_DEVICE_CAP, 4) & PCIEM_CAP_FLR))
6334 * Disable busmastering to prevent generation of new
6335 * transactions while waiting for the device to go idle. If
6336 * the idle timeout fails, the command register is restored
6337 * which will re-enable busmastering.
6339 cmd = pci_read_config(dev, PCIR_COMMAND, 2);
6340 pci_write_config(dev, PCIR_COMMAND, cmd & ~(PCIM_CMD_BUSMASTEREN), 2);
6341 if (!pcie_wait_for_pending_transactions(dev, max_delay)) {
6343 pci_write_config(dev, PCIR_COMMAND, cmd, 2);
6346 pci_printf(&dinfo->cfg,
6347 "Resetting with transactions pending after %d ms\n",
6351 * Extend the post-FLR delay to cover the maximum
6352 * Completion Timeout delay of anything in flight
6353 * during the FLR delay. Enforce a minimum delay of
6356 compl_delay = pcie_get_max_completion_timeout(dev) / 1000;
6357 if (compl_delay < 10)
6362 /* Initiate the reset. */
6363 ctl = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2);
6364 pci_write_config(dev, cap + PCIER_DEVICE_CTL, ctl |
6365 PCIEM_CTL_INITIATE_FLR, 2);
6367 /* Wait for 100ms. */
6368 pause_sbt("pcieflr", (100 + compl_delay) * SBT_1MS, 0, C_HARDCLOCK);
6370 if (pci_read_config(dev, cap + PCIER_DEVICE_STA, 2) &
6371 PCIEM_STA_TRANSACTION_PND)
6372 pci_printf(&dinfo->cfg, "Transactions pending after FLR!\n");
6377 * Attempt a power-management reset by cycling the device in/out of D3
6378 * state. PCI spec says we can only go into D3 state from D0 state.
6379 * Transition from D[12] into D0 before going to D3 state.
6382 pci_power_reset(device_t dev)
6386 ps = pci_get_powerstate(dev);
6387 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3)
6388 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
6389 pci_set_powerstate(dev, PCI_POWERSTATE_D3);
6390 pci_set_powerstate(dev, ps);
6395 * Try link drop and retrain of the downstream port of upstream
6396 * switch, for PCIe. According to the PCIe 3.0 spec 6.6.1, this must
6397 * cause Conventional Hot reset of the device in the slot.
6398 * Alternative, for PCIe, could be the secondary bus reset initiatied
6399 * on the upstream switch PCIR_BRIDGECTL_1, bit 6.
6402 pcie_link_reset(device_t port, int pcie_location)
6406 v = pci_read_config(port, pcie_location + PCIER_LINK_CTL, 2);
6407 v |= PCIEM_LINK_CTL_LINK_DIS;
6408 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6409 pause_sbt("pcier1", mstosbt(20), 0, 0);
6410 v &= ~PCIEM_LINK_CTL_LINK_DIS;
6411 v |= PCIEM_LINK_CTL_RETRAIN_LINK;
6412 pci_write_config(port, pcie_location + PCIER_LINK_CTL, v, 2);
6413 pause_sbt("pcier2", mstosbt(100), 0, 0); /* 100 ms */
6414 v = pci_read_config(port, pcie_location + PCIER_LINK_STA, 2);
6415 return ((v & PCIEM_LINK_STA_TRAINING) != 0 ? ETIMEDOUT : 0);
6419 pci_reset_post(device_t dev, device_t child)
6422 if (dev == device_get_parent(child))
6423 pci_restore_state(child);
6428 pci_reset_prepare(device_t dev, device_t child)
6431 if (dev == device_get_parent(child))
6432 pci_save_state(child);
6437 pci_reset_child(device_t dev, device_t child, int flags)
6441 if (dev == NULL || device_get_parent(child) != dev)
6443 if ((flags & DEVF_RESET_DETACH) != 0) {
6444 error = device_get_state(child) == DS_ATTACHED ?
6445 device_detach(child) : 0;
6447 error = BUS_SUSPEND_CHILD(dev, child);
6450 if (!pcie_flr(child, 1000, false)) {
6451 error = BUS_RESET_PREPARE(dev, child);
6453 pci_power_reset(child);
6454 BUS_RESET_POST(dev, child);
6456 if ((flags & DEVF_RESET_DETACH) != 0)
6457 device_probe_and_attach(child);
6459 BUS_RESUME_CHILD(dev, child);
6464 const struct pci_device_table *
6465 pci_match_device(device_t child, const struct pci_device_table *id, size_t nelt)
6468 uint16_t vendor, device, subvendor, subdevice, class, subclass, revid;
6470 vendor = pci_get_vendor(child);
6471 device = pci_get_device(child);
6472 subvendor = pci_get_subvendor(child);
6473 subdevice = pci_get_subdevice(child);
6474 class = pci_get_class(child);
6475 subclass = pci_get_subclass(child);
6476 revid = pci_get_revid(child);
6477 while (nelt-- > 0) {
6479 if (id->match_flag_vendor)
6480 match &= vendor == id->vendor;
6481 if (id->match_flag_device)
6482 match &= device == id->device;
6483 if (id->match_flag_subvendor)
6484 match &= subvendor == id->subvendor;
6485 if (id->match_flag_subdevice)
6486 match &= subdevice == id->subdevice;
6487 if (id->match_flag_class)
6488 match &= class == id->class_id;
6489 if (id->match_flag_subclass)
6490 match &= subclass == id->subclass;
6491 if (id->match_flag_revid)
6492 match &= revid == id->revid;
6501 pci_print_faulted_dev_name(const struct pci_devinfo *dinfo)
6503 const char *dev_name;
6506 dev = dinfo->cfg.dev;
6507 printf("pci%d:%d:%d:%d", dinfo->cfg.domain, dinfo->cfg.bus,
6508 dinfo->cfg.slot, dinfo->cfg.func);
6509 dev_name = device_get_name(dev);
6510 if (dev_name != NULL)
6511 printf(" (%s%d)", dev_name, device_get_unit(dev));
6515 pci_print_faulted_dev(void)
6517 struct pci_devinfo *dinfo;
6523 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6524 dev = dinfo->cfg.dev;
6525 status = pci_read_config(dev, PCIR_STATUS, 2);
6526 status &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6527 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6528 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6530 pci_print_faulted_dev_name(dinfo);
6531 printf(" error 0x%04x\n", status);
6533 if (dinfo->cfg.pcie.pcie_location != 0) {
6534 status = pci_read_config(dev,
6535 dinfo->cfg.pcie.pcie_location +
6536 PCIER_DEVICE_STA, 2);
6537 if ((status & (PCIEM_STA_CORRECTABLE_ERROR |
6538 PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
6539 PCIEM_STA_UNSUPPORTED_REQ)) != 0) {
6540 pci_print_faulted_dev_name(dinfo);
6541 printf(" PCIe DEVCTL 0x%04x DEVSTA 0x%04x\n",
6542 pci_read_config(dev,
6543 dinfo->cfg.pcie.pcie_location +
6544 PCIER_DEVICE_CTL, 2),
6548 if (pci_find_extcap(dev, PCIZ_AER, &aer) == 0) {
6549 r1 = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6550 r2 = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6551 if (r1 != 0 || r2 != 0) {
6552 pci_print_faulted_dev_name(dinfo);
6553 printf(" AER UC 0x%08x Mask 0x%08x Svr 0x%08x\n"
6554 " COR 0x%08x Mask 0x%08x Ctl 0x%08x\n",
6555 r1, pci_read_config(dev, aer +
6556 PCIR_AER_UC_MASK, 4),
6557 pci_read_config(dev, aer +
6558 PCIR_AER_UC_SEVERITY, 4),
6559 r2, pci_read_config(dev, aer +
6560 PCIR_AER_COR_MASK, 4),
6561 pci_read_config(dev, aer +
6562 PCIR_AER_CAP_CONTROL, 4));
6563 for (i = 0; i < 4; i++) {
6564 r1 = pci_read_config(dev, aer +
6565 PCIR_AER_HEADER_LOG + i * 4, 4);
6566 printf(" HL%d: 0x%08x\n", i, r1);
6574 DB_SHOW_COMMAND(pcierr, pci_print_faulted_dev_db)
6577 pci_print_faulted_dev();
6581 db_clear_pcie_errors(const struct pci_devinfo *dinfo)
6587 dev = dinfo->cfg.dev;
6588 r = pci_read_config(dev, dinfo->cfg.pcie.pcie_location +
6589 PCIER_DEVICE_STA, 2);
6590 pci_write_config(dev, dinfo->cfg.pcie.pcie_location +
6591 PCIER_DEVICE_STA, r, 2);
6593 if (pci_find_extcap(dev, PCIZ_AER, &aer) != 0)
6595 r = pci_read_config(dev, aer + PCIR_AER_UC_STATUS, 4);
6597 pci_write_config(dev, aer + PCIR_AER_UC_STATUS, r, 4);
6598 r = pci_read_config(dev, aer + PCIR_AER_COR_STATUS, 4);
6600 pci_write_config(dev, aer + PCIR_AER_COR_STATUS, r, 4);
6603 DB_COMMAND(pci_clearerr, db_pci_clearerr)
6605 struct pci_devinfo *dinfo;
6607 uint16_t status, status1;
6609 STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
6610 dev = dinfo->cfg.dev;
6611 status1 = status = pci_read_config(dev, PCIR_STATUS, 2);
6612 status1 &= PCIM_STATUS_MDPERR | PCIM_STATUS_STABORT |
6613 PCIM_STATUS_RTABORT | PCIM_STATUS_RMABORT |
6614 PCIM_STATUS_SERR | PCIM_STATUS_PERR;
6617 pci_write_config(dev, PCIR_STATUS, status, 2);
6619 if (dinfo->cfg.pcie.pcie_location != 0)
6620 db_clear_pcie_errors(dinfo);