1 /* 2 * Copyright IBM Corp. 2012 3 * 4 * Author(s): 5 * Jan Glauber <jang@linux.vnet.ibm.com> 6 */ 7 8 #define COMPONENT "zPCI" 9 #define pr_fmt(fmt) COMPONENT ": " fmt 10 11 #include <linux/kernel.h> 12 #include <linux/stat.h> 13 #include <linux/pci.h> 14 15 static ssize_t show_fid(struct device *dev, struct device_attribute *attr, 16 char *buf) 17 { 18 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev)); 19 20 return sprintf(buf, "0x%08x\n", zdev->fid); 21 } 22 static DEVICE_ATTR(function_id, S_IRUGO, show_fid, NULL); 23 24 static ssize_t show_fh(struct device *dev, struct device_attribute *attr, 25 char *buf) 26 { 27 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev)); 28 29 return sprintf(buf, "0x%08x\n", zdev->fh); 30 } 31 static DEVICE_ATTR(function_handle, S_IRUGO, show_fh, NULL); 32 33 static ssize_t show_pchid(struct device *dev, struct device_attribute *attr, 34 char *buf) 35 { 36 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev)); 37 38 return sprintf(buf, "0x%04x\n", zdev->pchid); 39 } 40 static DEVICE_ATTR(pchid, S_IRUGO, show_pchid, NULL); 41 42 static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr, 43 char *buf) 44 { 45 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev)); 46 47 return sprintf(buf, "0x%02x\n", zdev->pfgid); 48 } 49 static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL); 50 51 static ssize_t store_recover(struct device *dev, struct device_attribute *attr, 52 const char *buf, size_t count) 53 { 54 struct pci_dev *pdev = to_pci_dev(dev); 55 struct zpci_dev *zdev = get_zdev(pdev); 56 int ret; 57 58 if (!device_remove_file_self(dev, attr)) 59 return count; 60 61 pci_stop_and_remove_bus_device(pdev); 62 ret = zpci_disable_device(zdev); 63 if (ret) 64 return ret; 65 66 ret = zpci_enable_device(zdev); 67 if (ret) 68 return ret; 69 70 pci_rescan_bus(zdev->bus); 71 return count; 72 } 73 static DEVICE_ATTR(recover, S_IWUSR, NULL, store_recover); 74 75 static struct device_attribute *zpci_dev_attrs[] = { 76 &dev_attr_function_id, 77 &dev_attr_function_handle, 78 &dev_attr_pchid, 79 &dev_attr_pfgid, 80 &dev_attr_recover, 81 NULL, 82 }; 83 84 int zpci_sysfs_add_device(struct device *dev) 85 { 86 int i, rc = 0; 87 88 for (i = 0; zpci_dev_attrs[i]; i++) { 89 rc = device_create_file(dev, zpci_dev_attrs[i]); 90 if (rc) 91 goto error; 92 } 93 return 0; 94 95 error: 96 while (--i >= 0) 97 device_remove_file(dev, zpci_dev_attrs[i]); 98 return rc; 99 } 100 101 void zpci_sysfs_remove_device(struct device *dev) 102 { 103 int i; 104 105 for (i = 0; zpci_dev_attrs[i]; i++) 106 device_remove_file(dev, zpci_dev_attrs[i]); 107 } 108