1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright IBM Corp. 2012 4 * 5 * Author(s): 6 * Jan Glauber <jang@linux.vnet.ibm.com> 7 */ 8 9 #define KMSG_COMPONENT "zpci" 10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 11 12 #include <linux/kernel.h> 13 #include <linux/stat.h> 14 #include <linux/pci.h> 15 16 #include <asm/sclp.h> 17 18 #define zpci_attr(name, fmt, member) \ 19 static ssize_t name##_show(struct device *dev, \ 20 struct device_attribute *attr, char *buf) \ 21 { \ 22 struct zpci_dev *zdev = to_zpci(to_pci_dev(dev)); \ 23 \ 24 return sprintf(buf, fmt, zdev->member); \ 25 } \ 26 static DEVICE_ATTR_RO(name) 27 28 zpci_attr(function_id, "0x%08x\n", fid); 29 zpci_attr(function_handle, "0x%08x\n", fh); 30 zpci_attr(pchid, "0x%04x\n", pchid); 31 zpci_attr(pfgid, "0x%02x\n", pfgid); 32 zpci_attr(vfn, "0x%04x\n", vfn); 33 zpci_attr(pft, "0x%02x\n", pft); 34 zpci_attr(uid, "0x%x\n", uid); 35 zpci_attr(segment0, "0x%02x\n", pfip[0]); 36 zpci_attr(segment1, "0x%02x\n", pfip[1]); 37 zpci_attr(segment2, "0x%02x\n", pfip[2]); 38 zpci_attr(segment3, "0x%02x\n", pfip[3]); 39 40 static ssize_t recover_store(struct device *dev, struct device_attribute *attr, 41 const char *buf, size_t count) 42 { 43 struct pci_dev *pdev = to_pci_dev(dev); 44 struct zpci_dev *zdev = to_zpci(pdev); 45 int ret; 46 47 if (!device_remove_file_self(dev, attr)) 48 return count; 49 50 pci_lock_rescan_remove(); 51 pci_stop_and_remove_bus_device(pdev); 52 ret = zpci_disable_device(zdev); 53 if (ret) 54 goto error; 55 56 ret = zpci_enable_device(zdev); 57 if (ret) 58 goto error; 59 60 pci_rescan_bus(zdev->bus); 61 pci_unlock_rescan_remove(); 62 63 return count; 64 65 error: 66 pci_unlock_rescan_remove(); 67 return ret; 68 } 69 static DEVICE_ATTR_WO(recover); 70 71 static ssize_t util_string_read(struct file *filp, struct kobject *kobj, 72 struct bin_attribute *attr, char *buf, 73 loff_t off, size_t count) 74 { 75 struct device *dev = kobj_to_dev(kobj); 76 struct pci_dev *pdev = to_pci_dev(dev); 77 struct zpci_dev *zdev = to_zpci(pdev); 78 79 return memory_read_from_buffer(buf, count, &off, zdev->util_str, 80 sizeof(zdev->util_str)); 81 } 82 static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN); 83 84 static ssize_t report_error_write(struct file *filp, struct kobject *kobj, 85 struct bin_attribute *attr, char *buf, 86 loff_t off, size_t count) 87 { 88 struct zpci_report_error_header *report = (void *) buf; 89 struct device *dev = kobj_to_dev(kobj); 90 struct pci_dev *pdev = to_pci_dev(dev); 91 struct zpci_dev *zdev = to_zpci(pdev); 92 int ret; 93 94 if (off || (count < sizeof(*report))) 95 return -EINVAL; 96 97 ret = sclp_pci_report(report, zdev->fh, zdev->fid); 98 99 return ret ? ret : count; 100 } 101 static BIN_ATTR(report_error, S_IWUSR, NULL, report_error_write, PAGE_SIZE); 102 103 static struct bin_attribute *zpci_bin_attrs[] = { 104 &bin_attr_util_string, 105 &bin_attr_report_error, 106 NULL, 107 }; 108 109 static struct attribute *zpci_dev_attrs[] = { 110 &dev_attr_function_id.attr, 111 &dev_attr_function_handle.attr, 112 &dev_attr_pchid.attr, 113 &dev_attr_pfgid.attr, 114 &dev_attr_pft.attr, 115 &dev_attr_vfn.attr, 116 &dev_attr_uid.attr, 117 &dev_attr_recover.attr, 118 NULL, 119 }; 120 static struct attribute_group zpci_attr_group = { 121 .attrs = zpci_dev_attrs, 122 .bin_attrs = zpci_bin_attrs, 123 }; 124 125 static struct attribute *pfip_attrs[] = { 126 &dev_attr_segment0.attr, 127 &dev_attr_segment1.attr, 128 &dev_attr_segment2.attr, 129 &dev_attr_segment3.attr, 130 NULL, 131 }; 132 static struct attribute_group pfip_attr_group = { 133 .name = "pfip", 134 .attrs = pfip_attrs, 135 }; 136 137 const struct attribute_group *zpci_attr_groups[] = { 138 &zpci_attr_group, 139 &pfip_attr_group, 140 NULL, 141 }; 142