1911e1c9bSNarendra K /* 2911e1c9bSNarendra K * Purpose: Export the firmware instance and label associated with 3911e1c9bSNarendra K * a pci device to sysfs 4911e1c9bSNarendra K * Copyright (C) 2010 Dell Inc. 5911e1c9bSNarendra K * by Narendra K <Narendra_K@dell.com>, 6911e1c9bSNarendra K * Jordan Hargrave <Jordan_Hargrave@dell.com> 7911e1c9bSNarendra K * 8911e1c9bSNarendra K * SMBIOS defines type 41 for onboard pci devices. This code retrieves 9911e1c9bSNarendra K * the instance number and string from the type 41 record and exports 10911e1c9bSNarendra K * it to sysfs. 11911e1c9bSNarendra K * 12911e1c9bSNarendra K * Please see http://linux.dell.com/wiki/index.php/Oss/libnetdevname for more 13911e1c9bSNarendra K * information. 14911e1c9bSNarendra K */ 15911e1c9bSNarendra K 16911e1c9bSNarendra K #include <linux/dmi.h> 17911e1c9bSNarendra K #include <linux/sysfs.h> 18911e1c9bSNarendra K #include <linux/pci.h> 19911e1c9bSNarendra K #include <linux/pci_ids.h> 20911e1c9bSNarendra K #include <linux/module.h> 21911e1c9bSNarendra K #include <linux/device.h> 22911e1c9bSNarendra K #include "pci.h" 23911e1c9bSNarendra K 24911e1c9bSNarendra K enum smbios_attr_enum { 25911e1c9bSNarendra K SMBIOS_ATTR_NONE = 0, 26911e1c9bSNarendra K SMBIOS_ATTR_LABEL_SHOW, 27911e1c9bSNarendra K SMBIOS_ATTR_INSTANCE_SHOW, 28911e1c9bSNarendra K }; 29911e1c9bSNarendra K 30911e1c9bSNarendra K static mode_t 31911e1c9bSNarendra K find_smbios_instance_string(struct pci_dev *pdev, char *buf, 32911e1c9bSNarendra K enum smbios_attr_enum attribute) 33911e1c9bSNarendra K { 34911e1c9bSNarendra K const struct dmi_device *dmi; 35911e1c9bSNarendra K struct dmi_dev_onboard *donboard; 36911e1c9bSNarendra K int bus; 37911e1c9bSNarendra K int devfn; 38911e1c9bSNarendra K 39911e1c9bSNarendra K bus = pdev->bus->number; 40911e1c9bSNarendra K devfn = pdev->devfn; 41911e1c9bSNarendra K 42911e1c9bSNarendra K dmi = NULL; 43911e1c9bSNarendra K while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, 44911e1c9bSNarendra K NULL, dmi)) != NULL) { 45911e1c9bSNarendra K donboard = dmi->device_data; 46911e1c9bSNarendra K if (donboard && donboard->bus == bus && 47911e1c9bSNarendra K donboard->devfn == devfn) { 48911e1c9bSNarendra K if (buf) { 49911e1c9bSNarendra K if (attribute == SMBIOS_ATTR_INSTANCE_SHOW) 50911e1c9bSNarendra K return scnprintf(buf, PAGE_SIZE, 51911e1c9bSNarendra K "%d\n", 52911e1c9bSNarendra K donboard->instance); 53911e1c9bSNarendra K else if (attribute == SMBIOS_ATTR_LABEL_SHOW) 54911e1c9bSNarendra K return scnprintf(buf, PAGE_SIZE, 55911e1c9bSNarendra K "%s\n", 56911e1c9bSNarendra K dmi->name); 57911e1c9bSNarendra K } 58911e1c9bSNarendra K return strlen(dmi->name); 59911e1c9bSNarendra K } 60911e1c9bSNarendra K } 61911e1c9bSNarendra K return 0; 62911e1c9bSNarendra K } 63911e1c9bSNarendra K 64911e1c9bSNarendra K static mode_t 65911e1c9bSNarendra K smbios_instance_string_exist(struct kobject *kobj, struct attribute *attr, 66911e1c9bSNarendra K int n) 67911e1c9bSNarendra K { 68911e1c9bSNarendra K struct device *dev; 69911e1c9bSNarendra K struct pci_dev *pdev; 70911e1c9bSNarendra K 71911e1c9bSNarendra K dev = container_of(kobj, struct device, kobj); 72911e1c9bSNarendra K pdev = to_pci_dev(dev); 73911e1c9bSNarendra K 74911e1c9bSNarendra K return find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE) ? 75911e1c9bSNarendra K S_IRUGO : 0; 76911e1c9bSNarendra K } 77911e1c9bSNarendra K 78911e1c9bSNarendra K static ssize_t 79911e1c9bSNarendra K smbioslabel_show(struct device *dev, struct device_attribute *attr, char *buf) 80911e1c9bSNarendra K { 81911e1c9bSNarendra K struct pci_dev *pdev; 82911e1c9bSNarendra K pdev = to_pci_dev(dev); 83911e1c9bSNarendra K 84911e1c9bSNarendra K return find_smbios_instance_string(pdev, buf, 85911e1c9bSNarendra K SMBIOS_ATTR_LABEL_SHOW); 86911e1c9bSNarendra K } 87911e1c9bSNarendra K 88911e1c9bSNarendra K static ssize_t 89911e1c9bSNarendra K smbiosinstance_show(struct device *dev, 90911e1c9bSNarendra K struct device_attribute *attr, char *buf) 91911e1c9bSNarendra K { 92911e1c9bSNarendra K struct pci_dev *pdev; 93911e1c9bSNarendra K pdev = to_pci_dev(dev); 94911e1c9bSNarendra K 95911e1c9bSNarendra K return find_smbios_instance_string(pdev, buf, 96911e1c9bSNarendra K SMBIOS_ATTR_INSTANCE_SHOW); 97911e1c9bSNarendra K } 98911e1c9bSNarendra K 99911e1c9bSNarendra K static struct device_attribute smbios_attr_label = { 100763e9db9SStephen Rothwell .attr = {.name = "label", .mode = 0444}, 101911e1c9bSNarendra K .show = smbioslabel_show, 102911e1c9bSNarendra K }; 103911e1c9bSNarendra K 104911e1c9bSNarendra K static struct device_attribute smbios_attr_instance = { 105763e9db9SStephen Rothwell .attr = {.name = "index", .mode = 0444}, 106911e1c9bSNarendra K .show = smbiosinstance_show, 107911e1c9bSNarendra K }; 108911e1c9bSNarendra K 109911e1c9bSNarendra K static struct attribute *smbios_attributes[] = { 110911e1c9bSNarendra K &smbios_attr_label.attr, 111911e1c9bSNarendra K &smbios_attr_instance.attr, 112911e1c9bSNarendra K NULL, 113911e1c9bSNarendra K }; 114911e1c9bSNarendra K 115911e1c9bSNarendra K static struct attribute_group smbios_attr_group = { 116911e1c9bSNarendra K .attrs = smbios_attributes, 117911e1c9bSNarendra K .is_visible = smbios_instance_string_exist, 118911e1c9bSNarendra K }; 119911e1c9bSNarendra K 120911e1c9bSNarendra K static int 121911e1c9bSNarendra K pci_create_smbiosname_file(struct pci_dev *pdev) 122911e1c9bSNarendra K { 123911e1c9bSNarendra K if (!sysfs_create_group(&pdev->dev.kobj, &smbios_attr_group)) 124911e1c9bSNarendra K return 0; 125911e1c9bSNarendra K return -ENODEV; 126911e1c9bSNarendra K } 127911e1c9bSNarendra K 128911e1c9bSNarendra K static void 129911e1c9bSNarendra K pci_remove_smbiosname_file(struct pci_dev *pdev) 130911e1c9bSNarendra K { 131911e1c9bSNarendra K sysfs_remove_group(&pdev->dev.kobj, &smbios_attr_group); 132911e1c9bSNarendra K } 133911e1c9bSNarendra K 134911e1c9bSNarendra K void pci_create_firmware_label_files(struct pci_dev *pdev) 135911e1c9bSNarendra K { 136911e1c9bSNarendra K if (!pci_create_smbiosname_file(pdev)) 137911e1c9bSNarendra K ; 138911e1c9bSNarendra K } 139911e1c9bSNarendra K 140911e1c9bSNarendra K void pci_remove_firmware_label_files(struct pci_dev *pdev) 141911e1c9bSNarendra K { 142911e1c9bSNarendra K pci_remove_smbiosname_file(pdev); 143911e1c9bSNarendra K } 144