Author: jhb Date: Mon Nov 23 23:48:07 2015 New Revision: 291225 URL: https://svnweb.freebsd.org/changeset/base/291225
Log: Add a new -B flag for use with list mode (-l) that lists details about bridges. Currently this includes information about what resources a bridge decodes on the upstream side for use by downstream devices including bus numbers, I/O port resources, and memory resources. Windows and bus ranges are enumerated for both PCI-PCI bridges and PCI-CardBus bridges. To simplify the implementation, all enumeration is done by reading the appropriate config space registers directly rather than querying the bridge driver in the kernel via new ioctls. This does result in a few limitations. First, an unimplemented window in a PCI-PCI bridge cannot be accurately detected as accurate detection requires writing to the window base register. That is not safe for pciconf(8). Instead, this assumes that any window where both the base and limit read as all zeroes is unimplemented. Second, the PCI-PCI bridge driver in a tree has a few quirks for PCI-PCI bridges that use subtractive decoding but do not indicate that via the progif config register. The list of quirks is duplicated in pciconf's source. Reviewed by: imp MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D4171 Modified: head/sys/dev/pci/pcireg.h head/sys/dev/pci/pcivar.h head/usr.sbin/pciconf/pciconf.8 head/usr.sbin/pciconf/pciconf.c Modified: head/sys/dev/pci/pcireg.h ============================================================================== --- head/sys/dev/pci/pcireg.h Mon Nov 23 23:36:57 2015 (r291224) +++ head/sys/dev/pci/pcireg.h Mon Nov 23 23:48:07 2015 (r291225) @@ -265,6 +265,11 @@ #define PCIR_BIOS_1 0x38 #define PCIR_BRIDGECTL_1 0x3e +#define PCI_PPBMEMBASE(h,l) ((((uint64_t)(h) << 32) + ((l)<<16)) & ~0xfffff) +#define PCI_PPBMEMLIMIT(h,l) ((((uint64_t)(h) << 32) + ((l)<<16)) | 0xfffff) +#define PCI_PPBIOBASE(h,l) ((((h)<<16) + ((l)<<8)) & ~0xfff) +#define PCI_PPBIOLIMIT(h,l) ((((h)<<16) + ((l)<<8)) | 0xfff) + /* config registers for header type 2 (CardBus) devices */ #define PCIR_MAX_BAR_2 0 @@ -284,6 +289,9 @@ #define PCIR_IOLIMIT0_2 0x30 #define PCIR_IOBASE1_2 0x34 #define PCIR_IOLIMIT1_2 0x38 +#define PCIM_CBBIO_16 0x0 +#define PCIM_CBBIO_32 0x1 +#define PCIM_CBBIO_MASK 0x3 #define PCIR_BRIDGECTL_2 0x3e @@ -292,6 +300,11 @@ #define PCIR_PCCARDIF_2 0x44 +#define PCI_CBBMEMBASE(l) ((l) & ~0xfffff) +#define PCI_CBBMEMLIMIT(l) ((l) | 0xfffff) +#define PCI_CBBIOBASE(l) ((l) & ~0x3) +#define PCI_CBBIOLIMIT(l) ((l) | 0x3) + /* PCI device class, subclass and programming interface definitions */ #define PCIC_OLD 0x00 @@ -479,6 +492,17 @@ #define PCIB_BCR_DISCARD_TIMER_STATUS 0x0400 #define PCIB_BCR_DISCARD_TIMER_SERREN 0x0800 +#define CBB_BCR_PERR_ENABLE 0x0001 +#define CBB_BCR_SERR_ENABLE 0x0002 +#define CBB_BCR_ISA_ENABLE 0x0004 +#define CBB_BCR_VGA_ENABLE 0x0008 +#define CBB_BCR_MASTER_ABORT_MODE 0x0020 +#define CBB_BCR_CARDBUS_RESET 0x0040 +#define CBB_BCR_IREQ_INT_ENABLE 0x0080 +#define CBB_BCR_PREFETCH_0_ENABLE 0x0100 +#define CBB_BCR_PREFETCH_1_ENABLE 0x0200 +#define CBB_BCR_WRITE_POSTING_ENABLE 0x0400 + /* PCI power manangement */ #define PCIR_POWER_CAP 0x2 #define PCIM_PCAP_SPEC 0x0007 Modified: head/sys/dev/pci/pcivar.h ============================================================================== --- head/sys/dev/pci/pcivar.h Mon Nov 23 23:36:57 2015 (r291224) +++ head/sys/dev/pci/pcivar.h Mon Nov 23 23:48:07 2015 (r291225) @@ -211,11 +211,6 @@ typedef struct pcicfg { /* additional type 1 device config header information (PCI to PCI bridge) */ -#define PCI_PPBMEMBASE(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) & ~0xfffff) -#define PCI_PPBMEMLIMIT(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) | 0xfffff) -#define PCI_PPBIOBASE(h,l) ((((h)<<16) + ((l)<<8)) & ~0xfff) -#define PCI_PPBIOLIMIT(h,l) ((((h)<<16) + ((l)<<8)) | 0xfff) - typedef struct { pci_addr_t pmembase; /* base address of prefetchable memory */ pci_addr_t pmemlimit; /* topmost address of prefetchable memory */ Modified: head/usr.sbin/pciconf/pciconf.8 ============================================================================== --- head/usr.sbin/pciconf/pciconf.8 Mon Nov 23 23:36:57 2015 (r291224) +++ head/usr.sbin/pciconf/pciconf.8 Mon Nov 23 23:48:07 2015 (r291225) @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd September 06, 2015 +.Dd November 23, 2015 .Dt PCICONF 8 .Os .Sh NAME @@ -33,7 +33,7 @@ .Nd diagnostic utility for the PCI bus .Sh SYNOPSIS .Nm -.Fl l Oo Fl bcevV Oc Op Ar device +.Fl l Oo Fl BbceVv Oc Op Ar device .Nm .Fl a Ar device .Nm @@ -112,6 +112,42 @@ device, which contains several (similar one chip. .Pp If the +.Fl B +option is supplied, +.Nm +will list additional information for +.Tn PCI +to +.Tn PCI +and +.Tn PCI +to +.Tn CardBus +bridges, +specifically the resource ranges decoded by the bridge for use by devices +behind the bridge. +Each bridge lists a range of bus numbers handled by the bridge and its +downstream devices. +Memory and I/O port decoding windows are enumerated via a line in the +following format: +.Bd -literal + window[1c] = type I/O Port, range 16, addr 0x5000-0x8fff, enabled +.Ed +.Pp +The first value after the +.Dq Li window +prefix in the square brackets is the offset of the decoding window in +config space in hexadecimal. +The type of a window is one of +.Dq Memory , +.Dq Prefetchable Memory , +or +.Dq I/O Port . +The range indicates the binary log of the maximum address the window decodes. +The address field indicates the start and end addresses of the decoded range. +Finally, the last flag indicates if the window is enabled or disabled. +.Pp +If the .Fl b option is supplied, .Nm @@ -132,7 +168,7 @@ The type of a BAR is one of .Dq Prefetchable Memory , or .Dq I/O Port . -The range indicates the maximum address the BAR decodes. +The range indicates the binary log of the maximum address the BAR decodes. The base and size indicate the start and length of the BAR's address window, respectively. Finally, the last flag indicates if the BAR is enabled or disabled. Modified: head/usr.sbin/pciconf/pciconf.c ============================================================================== --- head/usr.sbin/pciconf/pciconf.c Mon Nov 23 23:36:57 2015 (r291224) +++ head/usr.sbin/pciconf/pciconf.c Mon Nov 23 23:48:07 2015 (r291225) @@ -39,6 +39,7 @@ static const char rcsid[] = #include <ctype.h> #include <err.h> #include <inttypes.h> +#include <stdbool.h> #include <stdlib.h> #include <stdio.h> #include <string.h> @@ -69,9 +70,10 @@ struct pci_vendor_info TAILQ_HEAD(,pci_vendor_info) pci_vendors; static struct pcisel getsel(const char *str); +static void list_bridge(int fd, struct pci_conf *p); static void list_bars(int fd, struct pci_conf *p); -static void list_devs(const char *name, int verbose, int bars, int caps, - int errors, int vpd); +static void list_devs(const char *name, int verbose, int bars, int bridge, + int caps, int errors, int vpd); static void list_verbose(struct pci_conf *p); static void list_vpd(int fd, struct pci_conf *p); static const char *guess_class(struct pci_conf *p); @@ -87,7 +89,7 @@ static void usage(void) { fprintf(stderr, "%s\n%s\n%s\n%s\n", - "usage: pciconf -l [-bcevV] [device]", + "usage: pciconf -l [-BbcevV] [device]", " pciconf -a device", " pciconf -r [-b | -h] device addr[:addr2]", " pciconf -w [-b | -h] device addr value"); @@ -99,18 +101,22 @@ main(int argc, char **argv) { int c; int listmode, readmode, writemode, attachedmode; - int bars, caps, errors, verbose, vpd; + int bars, bridge, caps, errors, verbose, vpd; int byte, isshort; listmode = readmode = writemode = attachedmode = 0; - bars = caps = errors = verbose = vpd = byte = isshort = 0; + bars = bridge = caps = errors = verbose = vpd = byte = isshort = 0; - while ((c = getopt(argc, argv, "abcehlrwvV")) != -1) { + while ((c = getopt(argc, argv, "aBbcehlrwVv")) != -1) { switch(c) { case 'a': attachedmode = 1; break; + case 'B': + bridge = 1; + break; + case 'b': bars = 1; byte = 1; @@ -161,7 +167,7 @@ main(int argc, char **argv) if (listmode) { list_devs(optind + 1 == argc ? argv[optind] : NULL, verbose, - bars, caps, errors, vpd); + bars, bridge, caps, errors, vpd); } else if (attachedmode) { chkattached(argv[optind]); } else if (readmode) { @@ -178,8 +184,8 @@ main(int argc, char **argv) } static void -list_devs(const char *name, int verbose, int bars, int caps, int errors, - int vpd) +list_devs(const char *name, int verbose, int bars, int bridge, int caps, + int errors, int vpd) { int fd; struct pci_conf_io pc; @@ -190,7 +196,8 @@ list_devs(const char *name, int verbose, if (verbose) load_vendors(); - fd = open(_PATH_DEVPCI, (caps || errors) ? O_RDWR : O_RDONLY, 0); + fd = open(_PATH_DEVPCI, (bridge || caps || errors) ? O_RDWR : O_RDONLY, + 0); if (fd < 0) err(1, "%s", _PATH_DEVPCI); @@ -248,6 +255,8 @@ list_devs(const char *name, int verbose, list_verbose(p); if (bars) list_bars(fd, p); + if (bridge) + list_bridge(fd, p); if (caps) list_caps(fd, p); if (errors) @@ -261,6 +270,189 @@ list_devs(const char *name, int verbose, } static void +print_bus_range(int fd, struct pci_conf *p, int secreg, int subreg) +{ + uint8_t secbus, subbus; + + secbus = read_config(fd, &p->pc_sel, secreg, 1); + subbus = read_config(fd, &p->pc_sel, subreg, 1); + printf(" bus range = %u-%u\n", secbus, subbus); +} + +static void +print_window(int reg, const char *type, int range, uint64_t base, + uint64_t limit) +{ + + printf(" window[%02x] = type %s, range %2d, addr %#jx-%#jx, %s\n", + reg, type, range, (uintmax_t)base, (uintmax_t)limit, + base < limit ? "enabled" : "disabled"); +} + +static void +print_special_decode(bool isa, bool vga, bool subtractive) +{ + bool comma; + + if (isa || vga || subtractive) { + comma = false; + printf(" decode = "); + if (isa) { + printf("ISA"); + comma = true; + } + if (vga) { + printf("%sVGA", comma ? ", " : ""); + comma = true; + } + if (subtractive) + printf("%ssubtractive", comma ? ", " : ""); + printf("\n"); + } +} + +static void +print_bridge_windows(int fd, struct pci_conf *p) +{ + uint64_t base, limit; + uint32_t val; + uint16_t bctl; + bool subtractive; + int range; + + /* + * XXX: This assumes that a window with a base and limit of 0 + * is not implemented. In theory a window might be programmed + * at the smallest size with a base of 0, but those do not seem + * common in practice. + */ + val = read_config(fd, &p->pc_sel, PCIR_IOBASEL_1, 1); + if (val != 0 || read_config(fd, &p->pc_sel, PCIR_IOLIMITL_1, 1) != 0) { + if ((val & PCIM_BRIO_MASK) == PCIM_BRIO_32) { + base = PCI_PPBIOBASE( + read_config(fd, &p->pc_sel, PCIR_IOBASEH_1, 2), + val); + limit = PCI_PPBIOLIMIT( + read_config(fd, &p->pc_sel, PCIR_IOLIMITH_1, 2), + read_config(fd, &p->pc_sel, PCIR_IOLIMITL_1, 1)); + range = 32; + } else { + base = PCI_PPBIOBASE(0, val); + limit = PCI_PPBIOLIMIT(0, + read_config(fd, &p->pc_sel, PCIR_IOLIMITL_1, 1)); + range = 16; + } + print_window(PCIR_IOBASEL_1, "I/O Port", range, base, limit); + } + + base = PCI_PPBMEMBASE(0, + read_config(fd, &p->pc_sel, PCIR_MEMBASE_1, 2)); + limit = PCI_PPBMEMLIMIT(0, + read_config(fd, &p->pc_sel, PCIR_MEMLIMIT_1, 2)); + print_window(PCIR_MEMBASE_1, "Memory", 32, base, limit); + + val = read_config(fd, &p->pc_sel, PCIR_PMBASEL_1, 2); + if (val != 0 || read_config(fd, &p->pc_sel, PCIR_PMLIMITL_1, 2) != 0) { + if ((val & PCIM_BRPM_MASK) == PCIM_BRPM_64) { + base = PCI_PPBMEMBASE( + read_config(fd, &p->pc_sel, PCIR_PMBASEH_1, 4), + val); + limit = PCI_PPBMEMLIMIT( + read_config(fd, &p->pc_sel, PCIR_PMLIMITH_1, 4), + read_config(fd, &p->pc_sel, PCIR_PMLIMITL_1, 2)); + range = 64; + } else { + base = PCI_PPBMEMBASE(0, val); + limit = PCI_PPBMEMLIMIT(0, + read_config(fd, &p->pc_sel, PCIR_PMLIMITL_1, 2)); + range = 32; + } + print_window(PCIR_PMBASEL_1, "Prefetchable Memory", range, base, + limit); + } + + /* + * XXX: This list of bridges that are subtractive but do not set + * progif to indicate it is copied from pci_pci.c. + */ + subtractive = p->pc_progif == PCIP_BRIDGE_PCI_SUBTRACTIVE; + switch (p->pc_device << 16 | p->pc_vendor) { + case 0xa002177d: /* Cavium ThunderX */ + case 0x124b8086: /* Intel 82380FB Mobile */ + case 0x060513d7: /* Toshiba ???? */ + subtractive = true; + } + if (p->pc_vendor == 0x8086 && (p->pc_device & 0xff00) == 0x2400) + subtractive = true; + + bctl = read_config(fd, &p->pc_sel, PCIR_BRIDGECTL_1, 2); + print_special_decode(bctl & PCIB_BCR_ISA_ENABLE, + bctl & PCIB_BCR_VGA_ENABLE, subtractive); +} + +static void +print_cardbus_mem_window(int fd, struct pci_conf *p, int basereg, int limitreg, + bool prefetch) +{ + + print_window(basereg, prefetch ? "Prefetchable Memory" : "Memory", 32, + PCI_CBBMEMBASE(read_config(fd, &p->pc_sel, basereg, 4)), + PCI_CBBMEMLIMIT(read_config(fd, &p->pc_sel, limitreg, 4))); +} + +static void +print_cardbus_io_window(int fd, struct pci_conf *p, int basereg, int limitreg) +{ + uint32_t base, limit; + uint32_t val; + int range; + + val = read_config(fd, &p->pc_sel, basereg, 2); + if ((val & PCIM_CBBIO_MASK) == PCIM_CBBIO_32) { + base = PCI_CBBIOBASE(read_config(fd, &p->pc_sel, basereg, 4)); + limit = PCI_CBBIOBASE(read_config(fd, &p->pc_sel, limitreg, 4)); + range = 32; + } else { + base = PCI_CBBIOBASE(val); + limit = PCI_CBBIOBASE(read_config(fd, &p->pc_sel, limitreg, 2)); + range = 16; + } + print_window(basereg, "I/O Port", range, base, limit); +} + +static void +print_cardbus_windows(int fd, struct pci_conf *p) +{ + uint16_t bctl; + + bctl = read_config(fd, &p->pc_sel, PCIR_BRIDGECTL_2, 2); + print_cardbus_mem_window(fd, p, PCIR_MEMBASE0_2, PCIR_MEMLIMIT0_2, + bctl & CBB_BCR_PREFETCH_0_ENABLE); + print_cardbus_mem_window(fd, p, PCIR_MEMBASE1_2, PCIR_MEMLIMIT1_2, + bctl & CBB_BCR_PREFETCH_1_ENABLE); + print_cardbus_io_window(fd, p, PCIR_IOBASE0_2, PCIR_IOLIMIT0_2); + print_cardbus_io_window(fd, p, PCIR_IOBASE1_2, PCIR_IOLIMIT1_2); + print_special_decode(bctl & CBB_BCR_ISA_ENABLE, + bctl & CBB_BCR_VGA_ENABLE, false); +} + +static void +list_bridge(int fd, struct pci_conf *p) +{ + + switch (p->pc_hdr & PCIM_HDRTYPE) { + case PCIM_HDRTYPE_BRIDGE: + print_bus_range(fd, p, PCIR_SECBUS_1, PCIR_SUBBUS_1); + print_bridge_windows(fd, p); + break; + case PCIM_HDRTYPE_CARDBUS: + print_bus_range(fd, p, PCIR_SECBUS_2, PCIR_SUBBUS_2); + print_cardbus_windows(fd, p); + break; + } +} + +static void list_bars(int fd, struct pci_conf *p) { int i, max; _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
