[Crash-utility] [PATCH] dev: add PCI information in recently kernel.
Dave Anderson
anderson at redhat.com
Mon Sep 24 20:41:50 UTC 2018
Hello Masayoshi,
Your patch has been queued for crash-7.2.5:
https://github.com/crash-utility/crash/commit/27a6ebd0cda386b1dfb7b0fffb4d8b489b391ccf
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 at jp.fujitsu.com>
>
> 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 at jp.fujitsu.com>
> ---
> 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
>
> --
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