Kernel analysis utility for live systems, netdump, diskdump, kdump, LKCD or mcore dumpfiles
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

412 lines
12 KiB

commit 27a6ebd0cda386b1dfb7b0fffb4d8b489b391ccf
Author: Dave Anderson <anderson@redhat.com>
Date: Mon Sep 24 16:33:57 2018 -0400
Resurrection of the the "dev -p" option for displaying PCI device
data on Linux 2.6.26 and later kernels. The option was deprecated
as of Linux 2.6.26, and without the patch, the option would indicate
"dev: -p option not supported or applicable on this architecture
or kernel" when running against the newer kernel versions. PCI Bus
information will also be displayed with this patch.
(m.mizuma@jp.fujitsu.com)
diff --git a/defs.h b/defs.h
index d6492c5..80c61ef 100644
--- a/defs.h
+++ b/defs.h
@@ -2032,6 +2032,17 @@ struct offset_table {
long bpf_prog_aux_user;
long user_struct_uid;
long idr_cur;
+ long pci_dev_dev;
+ long pci_dev_hdr_type;
+ long pci_dev_pcie_flags_reg;
+ 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 device_kobj;
+ long kobject_name;
};
struct size_table { /* stash of commonly-used sizes */
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)) {