1 /* 2 * Copyright IBM Corp. 2012 3 * 4 * Author(s): 5 * Jan Glauber <jang@linux.vnet.ibm.com> 6 */ 7 8 #define KMSG_COMPONENT "zpci" 9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 10 11 #include <linux/kernel.h> 12 #include <linux/stat.h> 13 #include <linux/pci.h> 14 15 #define zpci_attr(name, fmt, member) \ 16 static ssize_t name##_show(struct device *dev, \ 17 struct device_attribute *attr, char *buf) \ 18 { \ 19 struct zpci_dev *zdev = to_zpci(to_pci_dev(dev)); \ 20 \ 21 return sprintf(buf, fmt, zdev->member); \ 22 } \ 23 static DEVICE_ATTR_RO(name) 24 25 zpci_attr(function_id, "0x%08x\n", fid); 26 zpci_attr(function_handle, "0x%08x\n", fh); 27 zpci_attr(pchid, "0x%04x\n", pchid); 28 zpci_attr(pfgid, "0x%02x\n", pfgid); 29 zpci_attr(vfn, "0x%04x\n", vfn); 30 zpci_attr(pft, "0x%02x\n", pft); 31 zpci_attr(uid, "0x%x\n", uid); 32 zpci_attr(segment0, "0x%02x\n", pfip[0]); 33 zpci_attr(segment1, "0x%02x\n", pfip[1]); 34 zpci_attr(segment2, "0x%02x\n", pfip[2]); 35 zpci_attr(segment3, "0x%02x\n", pfip[3]); 36 37 static ssize_t recover_store(struct device *dev, struct device_attribute *attr, 38 const char *buf, size_t count) 39 { 40 struct pci_dev *pdev = to_pci_dev(dev); 41 struct zpci_dev *zdev = to_zpci(pdev); 42 int ret; 43 44 if (!device_remove_file_self(dev, attr)) 45 return count; 46 47 pci_lock_rescan_remove(); 48 pci_stop_and_remove_bus_device(pdev); 49 ret = zpci_disable_device(zdev); 50 if (ret) 51 goto error; 52 53 ret = zpci_enable_device(zdev); 54 if (ret) 55 goto error; 56 57 pci_rescan_bus(zdev->bus); 58 pci_unlock_rescan_remove(); 59 60 return count; 61 62 error: 63 pci_unlock_rescan_remove(); 64 return ret; 65 } 66 static DEVICE_ATTR_WO(recover); 67 68 static ssize_t util_string_read(struct file *filp, struct kobject *kobj, 69 struct bin_attribute *attr, char *buf, 70 loff_t off, size_t count) 71 { 72 struct device *dev = kobj_to_dev(kobj); 73 struct pci_dev *pdev = to_pci_dev(dev); 74 struct zpci_dev *zdev = to_zpci(pdev); 75 76 return memory_read_from_buffer(buf, count, &off, zdev->util_str, 77 sizeof(zdev->util_str)); 78 } 79 static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN); 80 static struct bin_attribute *zpci_bin_attrs[] = { 81 &bin_attr_util_string, 82 NULL, 83 }; 84 85 static struct attribute *zpci_dev_attrs[] = { 86 &dev_attr_function_id.attr, 87 &dev_attr_function_handle.attr, 88 &dev_attr_pchid.attr, 89 &dev_attr_pfgid.attr, 90 &dev_attr_pft.attr, 91 &dev_attr_vfn.attr, 92 &dev_attr_uid.attr, 93 &dev_attr_recover.attr, 94 NULL, 95 }; 96 static struct attribute_group zpci_attr_group = { 97 .attrs = zpci_dev_attrs, 98 .bin_attrs = zpci_bin_attrs, 99 }; 100 101 static struct attribute *pfip_attrs[] = { 102 &dev_attr_segment0.attr, 103 &dev_attr_segment1.attr, 104 &dev_attr_segment2.attr, 105 &dev_attr_segment3.attr, 106 NULL, 107 }; 108 static struct attribute_group pfip_attr_group = { 109 .name = "pfip", 110 .attrs = pfip_attrs, 111 }; 112 113 const struct attribute_group *zpci_attr_groups[] = { 114 &zpci_attr_group, 115 &pfip_attr_group, 116 NULL, 117 }; 118