powerpc/pci: Trace more information from pci_dn

Originally, EEH probes on device_node or pci_dev and populates the
corresponding eeh_dev. In the subsequent patches, EEH will probes
on pci_dn and populates the corresponding eeh_dev. So we have to
cache some information in pci_dn, either from device_node or SRIOV
PF's enablement platform hook, to populate the eeh_dev properly.

The motivation to probe pci_dn, instead of device node or pci_dev,
to populate eeh_dev is SRIOV VFs are dynamically created and we
don't have the corresponding device nodes for them.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 0ab2dadaf842..d139f72ff9d5 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -166,6 +166,15 @@ void *update_dn_pci_info(struct device_node *dn, void *data)
                 pdn->devfn = (addr >> 8) & 0xff;
         }
 
+        /* vendor/device IDs and class code */
+        regs = of_get_property(dn, "vendor-id", NULL);
+        pdn->vendor_id = regs ? of_read_number(regs, 1) : 0;
+        regs = of_get_property(dn, "device-id", NULL);
+        pdn->device_id = regs ? of_read_number(regs, 1) : 0;
+        regs = of_get_property(dn, "class-code", NULL);
+        pdn->class_code = regs ? of_read_number(regs, 1) : 0;
+
+        /* Extended config space */
         pdn->pci_ext_config_space = (type && of_read_number(type, 1) == 1);
 
         /* Attach to parent node */
@@ -255,6 +264,7 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb)
         pdn = dn->data;
         if (pdn) {
                 pdn->devfn = pdn->busno = -1;
+                pdn->vendor_id = pdn->device_id = pdn->class_code = 0;
                 pdn->phb = phb;
                 phb->pci_data = pdn;
         }