The Device name of a PCI or PCI Express device under OS may be exported via
ACPI _DSM function with function index 7.
The kernel already exports this string through sysfs under a PCI device through
the "label" sysfs attribute.
This patch reads the device name if available and shows it to the user.
Real world examples:
Device Name: "USB HS EHCI Controller #2 #3"
Device Name: "USB HS EHCI Controller #1"
Device Name: "SATA Controller #1"
Device Name: "Onboard LAN #1"
Device Name: "Onboard LAN #2"
Device Name: "Onboard Video (PILOT-3)"
Compare with PCI Firmware Spec v3.1 chapter 4.6.7 and
ACPI spec v5.0 chapter 9.14.1
The DeviceName is not shown by default, but starting from first verbose
parameter (-v).
Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
CC: linux-pci@xxxxxxxxxxxxxxx
---
lib/pci.h | 1 +
lib/sysfs.c | 4 ++++
lspci.c | 2 ++
3 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/lib/pci.h b/lib/pci.h
index 38e2e99..f31419d 100644
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -131,6 +131,7 @@ struct pci_dev {
struct pci_cap *first_cap; /* List of capabilities */
char *phy_slot; /* Physical slot */
char *module_alias; /* Linux kernel module alias */
+ char *label; /* Device name as exported by BIOS */
/* Fields used internally: */
struct pci_access *access;
diff --git a/lib/sysfs.c b/lib/sysfs.c
index 5a48c0d..3a8a34f 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -199,6 +199,10 @@ static void sysfs_scan(struct pci_access *a)
d->vendor_id = sysfs_get_value(d, "vendor");
d->device_id = sysfs_get_value(d, "device");
d->device_class = sysfs_get_value(d, "class") >> 8;
+ char buf[1024];
+ if (sysfs_get_string(d, "label", buf, 0))
+ d->label = pci_strdup(d->access, buf);
+
d->known_fields = PCI_FILL_IDENT | PCI_FILL_CLASS | PCI_FILL_IRQ | PCI_FILL_BASES | PCI_FILL_ROM_BASE | PCI_FILL_SIZES;
}
pci_link_dev(a, d);
diff --git a/lspci.c b/lspci.c
index dbba678..eb17af5 100644
--- a/lspci.c
+++ b/lspci.c
@@ -315,6 +315,8 @@ show_terse(struct device *d)
word subsys_v, subsys_d;
char ssnamebuf[256];
+ if (p->label)
+ printf("\tDeviceName: %s", p->label);
get_subid(d, &subsys_v, &subsys_d);
if (subsys_v && subsys_v != 0xffff)
printf("\tSubsystem: %s\n",
--
1.7.6.1
--
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