Re: [Crash-utility] [PATCH] dev: add PCI information in recently kernel.

Hello Masayoshi, Your patch has been queued for crash-7.2.5: https://github.com/crash-utility/crash/commit/27a6ebd0cda386b1dfb7b0fffb4... Note that I moved the new offset_table entries to the end of the structure so that previously-compiled extension modules using OFFSET() will not break.

Thanks, Dave ----- Original Message ----- > From: Masayoshi Mizuma <m.mizuma(a)jp.fujitsu.com&gt; > > dev -p supports to show the PCI information, however, it works > in old kernel only. This patch gets it available in recently kernel. > And also it will show the PCI BUS information. The BUS information > may be useful for investigation of PCI hotplug issue to track the > PCI bridge. > > Signed-off-by: Masayoshi Mizuma <m.mizuma(a)jp.fujitsu.com&gt; > --- > defs.h | 11 ++ > dev.c | 333 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-- > 2 files changed, 338 insertions(+), 6 deletions(-) > > diff --git a/defs.h b/defs.h > index d6492c5..e7d9bb2 100644 > --- a/defs.h > +++ b/defs.h > @@ -1624,11 +1624,20 @@ struct offset_table { /* stash of > commonly-used offsets */ > long pci_dev_global_list; > long pci_dev_next; > long pci_dev_bus; > + long pci_dev_dev; > long pci_dev_devfn; > long pci_dev_class; > long pci_dev_device; > + long pci_dev_hdr_type; > + long pci_dev_pcie_flags_reg; > long pci_dev_vendor; > long pci_bus_number; > + long pci_bus_node; > + long pci_bus_devices; > + long pci_bus_dev; > + long pci_bus_children; > + long pci_bus_parent; > + long pci_bus_self; > long resource_entry_t_from; > long resource_entry_t_num; > long resource_entry_t_name; > @@ -1832,6 +1841,7 @@ struct offset_table { /* stash of > commonly-used offsets */ > long class_private_devices; > long device_knode_class; > long device_node; > + long device_kobj; > long gendisk_dev; > long gendisk_kobj; > long gendisk_part0; > @@ -1841,6 +1851,7 @@ struct offset_table { /* stash of > commonly-used offsets */ > long klist_node_n_klist; > long klist_node_n_node; > long kobject_entry; > + long kobject_name; > long kset_list; > long request_list_count; > long request_queue_in_flight; > diff --git a/dev.c b/dev.c > index 3db898a..7ce2422 100644 > --- a/dev.c > +++ b/dev.c > @@ -24,6 +24,7 @@ static void dump_blkdevs_v3(ulong); > static ulong search_cdev_map_probes(char *, int, int, ulong *); > static ulong search_bdev_map_probes(char *, int, int, ulong *); > static void do_pci(void); > +static void do_pci2(void); > static void do_io(void); > static void do_resource_list(ulong, char *, int); > > @@ -51,11 +52,23 @@ dev_init(void) > MEMBER_OFFSET_INIT(pci_dev_global_list, "pci_dev", "global_list"); > MEMBER_OFFSET_INIT(pci_dev_next, "pci_dev", "next"); > MEMBER_OFFSET_INIT(pci_dev_bus, "pci_dev", "bus"); > + MEMBER_OFFSET_INIT(pci_dev_dev, "pci_dev", "dev"); > MEMBER_OFFSET_INIT(pci_dev_devfn, "pci_dev", "devfn"); > MEMBER_OFFSET_INIT(pci_dev_class, "pci_dev", "class"); > MEMBER_OFFSET_INIT(pci_dev_device, "pci_dev", "device"); > + MEMBER_OFFSET_INIT(pci_dev_hdr_type, "pci_dev", "hdr_type"); > + MEMBER_OFFSET_INIT(pci_dev_pcie_flags_reg, "pci_dev", "pcie_flags_reg"); > MEMBER_OFFSET_INIT(pci_dev_vendor, "pci_dev", "vendor"); > MEMBER_OFFSET_INIT(pci_bus_number, "pci_bus", "number"); > + MEMBER_OFFSET_INIT(pci_bus_node, "pci_bus", "node"); > + MEMBER_OFFSET_INIT(pci_bus_devices, "pci_bus", "devices"); > + MEMBER_OFFSET_INIT(pci_bus_dev, "pci_bus", "dev"); > + MEMBER_OFFSET_INIT(pci_bus_children, "pci_bus", "children"); > + MEMBER_OFFSET_INIT(pci_bus_parent, "pci_bus", "parent"); > + MEMBER_OFFSET_INIT(pci_bus_self, "pci_bus", "self"); > + > + MEMBER_OFFSET_INIT(device_kobj, "device", "kobj"); > + MEMBER_OFFSET_INIT(kobject_name, "kobject", "name"); > > STRUCT_SIZE_INIT(resource, "resource"); > if ((VALID_STRUCT(resource) && symbol_exists("do_resource_list")) || > @@ -114,10 +127,14 @@ cmd_dev(void) > return; > > case 'p': > - if (machine_type("S390X") || > - (THIS_KERNEL_VERSION >= LINUX(2,6,26))) > + if (machine_type("S390X")) > + option_not_supported(c); > + if (symbol_exists("pci_devices")) > + do_pci(); > + else if (symbol_exists("pci_root_buses")) > + do_pci2(); > + else > option_not_supported(c); > - do_pci(); > return; > > default: > @@ -2217,6 +2234,313 @@ do_resource_list(ulong first_entry, char > *resource_buf, int size) > > #endif /* USE_2_2_17_PCI_H */ > > +#define PCI_EXP_FLAGS_TYPE 0x00f0 /* Device/Port type */ > +#define PCI_EXP_TYPE_ENDPOINT 0x0 /* Express Endpoint */ > +#define PCI_EXP_TYPE_LEG_END 0x1 /* Legacy Endpoint */ > +#define PCI_EXP_TYPE_ROOT_PORT 0x4 /* Root Port */ > +#define PCI_EXP_TYPE_UPSTREAM 0x5 /* Upstream Port */ > +#define PCI_EXP_TYPE_DOWNSTREAM 0x6 /* Downstream Port */ > +#define PCI_EXP_TYPE_PCI_BRIDGE 0x7 /* PCIe to PCI/PCI-X Bridge */ > +#define PCI_EXP_TYPE_PCIE_BRIDGE 0x8 /* PCI/PCI-X to PCIe Bridge */ > +#define PCI_EXP_TYPE_RC_END 0x9 /* Root Complex Integrated Endpoint > */ > +#define PCI_EXP_TYPE_RC_EC 0xa /* Root Complex Event Collector */ > + > +static void > +fill_dev_name(ulong pci_dev, char *name) > +{ > + ulong kobj, value; > + > + memset(name, 0, sizeof(*name) * BUFSIZE); > + > + kobj = pci_dev + OFFSET(pci_dev_dev) + OFFSET(device_kobj); > + > + readmem(kobj + OFFSET(kobject_name), > + KVADDR, &value, sizeof(void *), "kobject name", > + FAULT_ON_ERROR); > + > + read_string(value, name, BUFSIZE-1); > +} > + > +static void > +fill_bus_name(ulong pci_bus, char *name) > +{ > + ulong kobj, value; > + > + memset(name, 0, sizeof(*name) * BUFSIZE); > + > + kobj = pci_bus + OFFSET(pci_bus_dev) + OFFSET(device_kobj); > + > + readmem(kobj + OFFSET(kobject_name), > + KVADDR, &value, sizeof(void *), "kobject name", > + FAULT_ON_ERROR); > + > + read_string(value, name, BUFSIZE-1); > +} > + > +static void > +fill_dev_id(ulong pci_dev, char *id) > +{ > + unsigned short device, vendor; > + > + memset(id, 0, sizeof(*id) * BUFSIZE); > + > + readmem(pci_dev + OFFSET(pci_dev_device), > + KVADDR, &device, sizeof(short), "pci dev device", > + FAULT_ON_ERROR); > + readmem(pci_dev + OFFSET(pci_dev_vendor), KVADDR, > + &vendor, sizeof(short), "pci dev vendor", FAULT_ON_ERROR); > + > + sprintf(id, "%x:%x", vendor, device); > +} > + > +static void > +fill_dev_class(ulong pci_dev, char *c) > +{ > + unsigned int class; > + > + memset(c, 0, sizeof(*c) * BUFSIZE); > + readmem(pci_dev + OFFSET(pci_dev_class), KVADDR, > + &class, sizeof(int), "pci class", FAULT_ON_ERROR); > + > + class >>= 8; > + > + sprintf(c, "%04x", class); > +} > + > +static int > +pci_pcie_type(ulong cap) > +{ > + return (cap & PCI_EXP_FLAGS_TYPE) >> 4; > +} > + > +static int > +pci_is_bridge(unsigned char hdr_type) > +{ > + return hdr_type == PCI_HEADER_TYPE_BRIDGE || > + hdr_type == PCI_HEADER_TYPE_CARDBUS; > +} > + > +static void > +fill_pcie_type(ulong pcidev, char *t) > +{ > + int type, bufidx = 0; > + unsigned short pciecap; > + unsigned char hdr_type; > + > + memset(t, 0, sizeof(*t) * BUFSIZE); > + > + readmem(pcidev + OFFSET(pci_dev_hdr_type), KVADDR, &hdr_type, > + sizeof(char), "pci dev hdr_type", FAULT_ON_ERROR); > + > + if (!VALID_MEMBER(pci_dev_pcie_flags_reg)) > + goto bridge_chk; > + > + readmem(pcidev + OFFSET(pci_dev_pcie_flags_reg), KVADDR, &pciecap, > + sizeof(unsigned short), "pci dev pcie_flags_reg", FAULT_ON_ERROR); > + > + type = pci_pcie_type(pciecap); > + > + if (type == PCI_EXP_TYPE_ENDPOINT) > + bufidx = sprintf(t, "ENDPOINT"); > + else if (type == PCI_EXP_TYPE_LEG_END) > + bufidx = sprintf(t, "LEG_END"); > + else if (type == PCI_EXP_TYPE_ROOT_PORT) > + bufidx = sprintf(t, "ROOT_PORT"); > + else if (type == PCI_EXP_TYPE_UPSTREAM) > + bufidx = sprintf(t, "UPSTREAM"); > + else if (type == PCI_EXP_TYPE_DOWNSTREAM) > + bufidx = sprintf(t, "DOWNSTREAM"); > + else if (type == PCI_EXP_TYPE_PCI_BRIDGE) > + bufidx = sprintf(t, "PCI_BRIDGE"); > + else if (type == PCI_EXP_TYPE_PCIE_BRIDGE) > + bufidx = sprintf(t, "PCIE_BRIDGE"); > + else if (type == PCI_EXP_TYPE_RC_END) > + bufidx = sprintf(t, "RC_END"); > + else if (type == PCI_EXP_TYPE_RC_EC) > + bufidx = sprintf(t, "RC_EC"); > + > +bridge_chk: > + if (pci_is_bridge(hdr_type)) > + sprintf(t + bufidx, " [BRIDGE]"); > +} > + > +static void > +walk_devices(ulong pci_bus) > +{ > + struct list_data list_data, *ld; > + int devcnt, i; > + ulong *devlist, self; > + char name[BUFSIZE], class[BUFSIZE], id[BUFSIZE], type[BUFSIZE]; > + char pcidev_hdr[BUFSIZE]; > + char buf1[BUFSIZE]; > + char buf2[BUFSIZE]; > + char buf3[BUFSIZE]; > + char buf4[BUFSIZE]; > + char buf5[BUFSIZE]; > + > + ld = &list_data; > + > + BZERO(ld, sizeof(struct list_data)); > + > + readmem(pci_bus + OFFSET(pci_bus_devices), KVADDR, > + &ld->start, sizeof(void *), "pci bus devices", > + FAULT_ON_ERROR); > + > + if (VALID_MEMBER(pci_dev_pcie_flags_reg)) > + snprintf(pcidev_hdr, sizeof(pcidev_hdr), "%s %s %s %s %s\n", > + mkstring(buf1, VADDR_PRLEN, CENTER, "PCI DEV"), > + mkstring(buf2, strlen("0000:00:00.0"), CENTER, "DO:BU:SL.FN"), > + mkstring(buf3, strlen("0000") + 2, CENTER, "CLASS"), > + mkstring(buf4, strlen("0000:0000"), CENTER, "PCI_ID"), > + mkstring(buf5, 10, CENTER, "TYPE")); > + else > + snprintf(pcidev_hdr, sizeof(pcidev_hdr), "%s %s %s %s\n", > + mkstring(buf1, VADDR_PRLEN, CENTER, "PCI DEV"), > + mkstring(buf2, strlen("0000:00:00.0"), CENTER, "DO:BU:SL.FN"), > + mkstring(buf3, strlen("0000") + 2, CENTER, "CLASS"), > + mkstring(buf4, strlen("0000:0000"), CENTER, "PCI_ID")); > + > + fprintf(fp, " %s", pcidev_hdr); > + > + readmem(pci_bus + OFFSET(pci_bus_self), KVADDR, &self, > + sizeof(void *), "pci bus self", FAULT_ON_ERROR); > + if (self) { > + fill_dev_name(self, name); > + fill_dev_class(self, class); > + fill_dev_id(self, id); > + fill_pcie_type(self, type); > + fprintf(fp, " %s %s %s %s %s\n", > + mkstring(buf1, VADDR_PRLEN, LJUST|LONG_HEX, > + MKSTR(self)), > + mkstring(buf2, strlen("0000:00:00.0"), CENTER, name), > + mkstring(buf3, strlen("0000") + 2, CENTER, class), > + mkstring(buf4, strlen("0000:0000"), CENTER, id), > + mkstring(buf5, 10, CENTER, type)); > + } > + > + if (ld->start == (pci_bus + OFFSET(pci_bus_devices))) > + return; > + > + ld->end = pci_bus + OFFSET(pci_bus_devices); > + hq_open(); > + devcnt = do_list(ld); > + devlist = (ulong *)GETBUF(devcnt * sizeof(ulong)); > + devcnt = retrieve_list(devlist, devcnt); > + hq_close(); > + > + for (i = 0; i < devcnt; i++) { > + fill_dev_name(devlist[i], name); > + fill_dev_class(devlist[i], class); > + fill_dev_id(devlist[i], id); > + fill_pcie_type(devlist[i], type); > + fprintf(fp, " %s %s %s %s %s\n", > + mkstring(buf1, VADDR_PRLEN, LJUST|LONG_HEX, > + MKSTR(devlist[i])), > + mkstring(buf2, strlen("0000:00:00.0"), CENTER, name), > + mkstring(buf3, strlen("0000") + 2, CENTER, class), > + mkstring(buf4, strlen("0000:0000"), CENTER, id), > + mkstring(buf5, 10, CENTER, type)); > + } > + FREEBUF(devlist); > +} > + > +static void > +walk_buses(ulong pci_bus) > +{ > + struct list_data list_data, *ld; > + int buscnt, i; > + ulong *buslist, parent; > + char pcibus_hdr[BUFSIZE]; > + char buf1[BUFSIZE]; > + char buf2[BUFSIZE]; > + > + ld = &list_data; > + > + BZERO(ld, sizeof(struct list_data)); > + > + readmem(pci_bus + OFFSET(pci_bus_children), KVADDR, > + &ld->start, sizeof(void *), "pci bus children", > + FAULT_ON_ERROR); > + > + if (ld->start == (pci_bus + OFFSET(pci_bus_children))) > + return; > + > + ld->end = pci_bus + OFFSET(pci_bus_children); > + hq_open(); > + buscnt = do_list(ld); > + buslist = (ulong *)GETBUF(buscnt * sizeof(ulong)); > + buscnt = retrieve_list(buslist, buscnt); > + hq_close(); > + > + snprintf(pcibus_hdr, sizeof(pcibus_hdr), "%s %s\n", > + mkstring(buf1, VADDR_PRLEN, CENTER, "PCI BUS"), > + mkstring(buf2, VADDR_PRLEN, CENTER, "PARENT BUS")); > + > + for (i = 0; i < buscnt; i++) { > + readmem(buslist[i] + OFFSET(pci_bus_parent), KVADDR, &parent, > + sizeof(void *), "pci bus parent", FAULT_ON_ERROR); > + > + fprintf(fp, " %s", pcibus_hdr); > + > + fprintf(fp, " %s %s\n", > + mkstring(buf1, VADDR_PRLEN, LJUST|LONG_HEX, > + MKSTR(buslist[i])), > + mkstring(buf2, VADDR_PRLEN, LJUST|LONG_HEX, > + MKSTR(parent))); > + walk_devices(buslist[i]); > + fprintf(fp, "\n"); > + walk_buses(buslist[i]); > + } > + FREEBUF(buslist); > +} > + > +static void > +do_pci2(void) > +{ > + struct list_data list_data, *ld; > + int rootbuscnt, i; > + ulong *rootbuslist; > + unsigned long pci_root_bus_addr = symbol_value("pci_root_buses"); > + char name[BUFSIZE]; > + char pcirootbus_hdr[BUFSIZE]; > + char buf1[BUFSIZE]; > + char buf2[BUFSIZE]; > + > + ld = &list_data; > + BZERO(ld, sizeof(struct list_data)); > + > + get_symbol_data("pci_root_buses", sizeof(void *), &ld->start); > + > + if (ld->start == pci_root_bus_addr) > + error(FATAL, "no PCI devices found on this system.\n"); > + > + ld->end = pci_root_bus_addr; > + > + hq_open(); > + rootbuscnt = do_list(ld); > + rootbuslist = (ulong *)GETBUF(rootbuscnt * sizeof(ulong)); > + rootbuscnt = retrieve_list(rootbuslist, rootbuscnt); > + hq_close(); > + > + snprintf(pcirootbus_hdr, sizeof(pcirootbus_hdr), "%s %s\n", > + mkstring(buf1, VADDR_PRLEN, CENTER, "ROOT BUS"), > + mkstring(buf2, strlen("0000:00"), CENTER, "BUSNAME")); > + > + for (i = 0; i < rootbuscnt; i++) { > + fprintf(fp, "%s", pcirootbus_hdr); > + fill_bus_name(rootbuslist[i], name); > + fprintf(fp, "%s %s\n", > + mkstring(buf1, VADDR_PRLEN, LJUST|LONG_HEX, > + MKSTR(rootbuslist[i])), > + mkstring(buf2, strlen("0000:00"), CENTER, name)); > + walk_devices(rootbuslist[i]); > + walk_buses(rootbuslist[i]); > + > + fprintf(fp, "\n"); > + } > + FREEBUF(rootbuslist); > +} > + > static void > do_pci(void) > { > @@ -2230,9 +2554,6 @@ do_pci(void) > char buf2[BUFSIZE]; > char buf3[BUFSIZE]; > > - if (!symbol_exists("pci_devices")) > - error(FATAL, "no PCI devices found on this system.\n"); > - > BZERO(&pcilist_data, sizeof(struct list_data)); > > if (VALID_MEMBER(pci_dev_global_list)) { > -- > 2.19.0 > > -- > Crash-utility mailing list > Crash-utility(a)redhat.com > https://www.redhat.com/mailman/listinfo/crash-utility > -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility