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 mio_enabled_show(struct device *dev, 41 struct device_attribute *attr, char *buf) 42 { 43 struct zpci_dev *zdev = to_zpci(to_pci_dev(dev)); 44 45 return sprintf(buf, zpci_use_mio(zdev) ? "1\n" : "0\n"); 46 } 47 static DEVICE_ATTR_RO(mio_enabled); 48 49 static ssize_t recover_store(struct device *dev, struct device_attribute *attr, 50 const char *buf, size_t count) 51 { 52 struct pci_dev *pdev = to_pci_dev(dev); 53 struct zpci_dev *zdev = to_zpci(pdev); 54 int ret; 55 56 if (!device_remove_file_self(dev, attr)) 57 return count; 58 59 pci_lock_rescan_remove(); 60 pci_stop_and_remove_bus_device(pdev); 61 ret = zpci_disable_device(zdev); 62 if (ret) 63 goto error; 64 65 ret = zpci_enable_device(zdev); 66 if (ret) 67 goto error; 68 69 pci_rescan_bus(zdev->bus); 70 pci_unlock_rescan_remove(); 71 72 return count; 73 74 error: 75 pci_unlock_rescan_remove(); 76 return ret; 77 } 78 static DEVICE_ATTR_WO(recover); 79 80 static ssize_t util_string_read(struct file *filp, struct kobject *kobj, 81 struct bin_attribute *attr, char *buf, 82 loff_t off, size_t count) 83 { 84 struct device *dev = kobj_to_dev(kobj); 85 struct pci_dev *pdev = to_pci_dev(dev); 86 struct zpci_dev *zdev = to_zpci(pdev); 87 88 return memory_read_from_buffer(buf, count, &off, zdev->util_str, 89 sizeof(zdev->util_str)); 90 } 91 static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN); 92 93 static ssize_t report_error_write(struct file *filp, struct kobject *kobj, 94 struct bin_attribute *attr, char *buf, 95 loff_t off, size_t count) 96 { 97 struct zpci_report_error_header *report = (void *) buf; 98 struct device *dev = kobj_to_dev(kobj); 99 struct pci_dev *pdev = to_pci_dev(dev); 100 struct zpci_dev *zdev = to_zpci(pdev); 101 int ret; 102 103 if (off || (count < sizeof(*report))) 104 return -EINVAL; 105 106 ret = sclp_pci_report(report, zdev->fh, zdev->fid); 107 108 return ret ? ret : count; 109 } 110 static BIN_ATTR(report_error, S_IWUSR, NULL, report_error_write, PAGE_SIZE); 111 112 static struct bin_attribute *zpci_bin_attrs[] = { 113 &bin_attr_util_string, 114 &bin_attr_report_error, 115 NULL, 116 }; 117 118 static struct attribute *zpci_dev_attrs[] = { 119 &dev_attr_function_id.attr, 120 &dev_attr_function_handle.attr, 121 &dev_attr_pchid.attr, 122 &dev_attr_pfgid.attr, 123 &dev_attr_pft.attr, 124 &dev_attr_vfn.attr, 125 &dev_attr_uid.attr, 126 &dev_attr_recover.attr, 127 &dev_attr_mio_enabled.attr, 128 NULL, 129 }; 130 static struct attribute_group zpci_attr_group = { 131 .attrs = zpci_dev_attrs, 132 .bin_attrs = zpci_bin_attrs, 133 }; 134 135 static struct attribute *pfip_attrs[] = { 136 &dev_attr_segment0.attr, 137 &dev_attr_segment1.attr, 138 &dev_attr_segment2.attr, 139 &dev_attr_segment3.attr, 140 NULL, 141 }; 142 static struct attribute_group pfip_attr_group = { 143 .name = "pfip", 144 .attrs = pfip_attrs, 145 }; 146 147 const struct attribute_group *zpci_attr_groups[] = { 148 &zpci_attr_group, 149 &pfip_attr_group, 150 NULL, 151 }; 152