From c035ff1d2eaa03ab40839041e955a86a8e412eb4 Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Tue, 17 Mar 2015 16:15:04 +1100 Subject: [PATCH] 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 Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/pci-bridge.h | 3 +++ arch/powerpc/kernel/pci_dn.c | 10 ++++++++++ 2 files changed, 13 insertions(+) diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h index 706710b571c3..01b730a8a5a3 100644 --- a/arch/powerpc/include/asm/pci-bridge.h +++ b/arch/powerpc/include/asm/pci-bridge.h @@ -159,6 +159,9 @@ struct pci_dn { int busno; /* pci bus number */ int devfn; /* pci device and function number */ + int vendor_id; /* Vendor ID */ + int device_id; /* Device ID */ + int class_code; /* Device class code */ struct pci_dn *parent; struct pci_controller *phb; /* for pci devices */ 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; } -- 2.11.0