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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 428 | giacomo | 1 | /* |
| 2 | * drivers/pci/pci-sysfs.c |
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| 3 | * |
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| 4 | * (C) Copyright 2002 Greg Kroah-Hartman |
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| 5 | * (C) Copyright 2002 IBM Corp. |
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| 6 | * (C) Copyright 2003 Matthew Wilcox |
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| 7 | * (C) Copyright 2003 Hewlett-Packard |
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| 8 | * |
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| 9 | * File attributes for PCI devices |
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| 10 | * |
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| 11 | * Modeled after usb's driverfs.c |
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| 12 | * |
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| 13 | */ |
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| 14 | |||
| 15 | |||
| 16 | #include <linux/config.h> |
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| 17 | #include <linux/kernel.h> |
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| 18 | #include <linux/pci.h> |
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| 19 | #include <linux/stat.h> |
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| 20 | |||
| 21 | #include "pci.h" |
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| 22 | |||
| 23 | /* show configuration fields */ |
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| 24 | #define pci_config_attr(field, format_string) \ |
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| 25 | static ssize_t \ |
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| 26 | show_##field (struct device *dev, char *buf) \ |
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| 27 | { \ |
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| 28 | struct pci_dev *pdev; \ |
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| 29 | \ |
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| 30 | pdev = to_pci_dev (dev); \ |
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| 31 | return sprintf (buf, format_string, pdev->field); \ |
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| 32 | } \ |
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| 33 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); |
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| 34 | |||
| 35 | pci_config_attr(vendor, "0x%04x\n"); |
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| 36 | pci_config_attr(device, "0x%04x\n"); |
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| 37 | pci_config_attr(subsystem_vendor, "0x%04x\n"); |
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| 38 | pci_config_attr(subsystem_device, "0x%04x\n"); |
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| 39 | pci_config_attr(class, "0x%06x\n"); |
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| 40 | pci_config_attr(irq, "%u\n"); |
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| 41 | |||
| 42 | /* show resources */ |
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| 43 | static ssize_t |
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| 44 | pci_show_resources(struct device * dev, char * buf) |
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| 45 | { |
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| 46 | struct pci_dev * pci_dev = to_pci_dev(dev); |
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| 47 | char * str = buf; |
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| 48 | int i; |
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| 49 | int max = 7; |
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| 50 | |||
| 51 | if (pci_dev->subordinate) |
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| 52 | max = DEVICE_COUNT_RESOURCE; |
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| 53 | |||
| 54 | for (i = 0; i < max; i++) { |
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| 55 | str += sprintf(str,"0x%016lx 0x%016lx 0x%016lx\n", |
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| 56 | pci_resource_start(pci_dev,i), |
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| 57 | pci_resource_end(pci_dev,i), |
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| 58 | pci_resource_flags(pci_dev,i)); |
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| 59 | } |
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| 60 | return (str - buf); |
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| 61 | } |
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| 62 | |||
| 63 | static DEVICE_ATTR(resource,S_IRUGO,pci_show_resources,NULL); |
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| 64 | |||
| 65 | static ssize_t |
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| 66 | pci_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count) |
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| 67 | { |
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| 68 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); |
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| 69 | unsigned int size = 64; |
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| 70 | loff_t init_off = off; |
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| 71 | |||
| 72 | /* Several chips lock up trying to read undefined config space */ |
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| 73 | if (capable(CAP_SYS_ADMIN)) { |
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| 74 | size = 256; |
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| 75 | } else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
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| 76 | size = 128; |
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| 77 | } |
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| 78 | |||
| 79 | if (off > size) |
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| 80 | return 0; |
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| 81 | if (off + count > size) { |
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| 82 | size -= off; |
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| 83 | count = size; |
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| 84 | } else { |
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| 85 | size = count; |
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| 86 | } |
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| 87 | |||
| 88 | while (off & 3) { |
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| 89 | unsigned char val; |
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| 90 | pci_read_config_byte(dev, off, &val); |
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| 91 | buf[off - init_off] = val; |
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| 92 | off++; |
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| 93 | if (--size == 0) |
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| 94 | break; |
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| 95 | } |
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| 96 | |||
| 97 | while (size > 3) { |
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| 98 | unsigned int val; |
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| 99 | pci_read_config_dword(dev, off, &val); |
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| 100 | buf[off - init_off] = val & 0xff; |
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| 101 | buf[off - init_off + 1] = (val >> 8) & 0xff; |
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| 102 | buf[off - init_off + 2] = (val >> 16) & 0xff; |
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| 103 | buf[off - init_off + 3] = (val >> 24) & 0xff; |
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| 104 | off += 4; |
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| 105 | size -= 4; |
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| 106 | } |
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| 107 | |||
| 108 | while (size > 0) { |
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| 109 | unsigned char val; |
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| 110 | pci_read_config_byte(dev, off, &val); |
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| 111 | buf[off - init_off] = val; |
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| 112 | off++; |
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| 113 | --size; |
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| 114 | } |
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| 115 | |||
| 116 | return count; |
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| 117 | } |
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| 118 | |||
| 119 | static ssize_t |
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| 120 | pci_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count) |
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| 121 | { |
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| 122 | struct pci_dev *dev = to_pci_dev(container_of(kobj,struct device,kobj)); |
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| 123 | unsigned int size = count; |
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| 124 | loff_t init_off = off; |
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| 125 | |||
| 126 | if (off > 256) |
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| 127 | return 0; |
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| 128 | if (off + count > 256) { |
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| 129 | size = 256 - off; |
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| 130 | count = size; |
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| 131 | } |
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| 132 | |||
| 133 | while (off & 3) { |
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| 134 | pci_write_config_byte(dev, off, buf[off - init_off]); |
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| 135 | off++; |
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| 136 | if (--size == 0) |
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| 137 | break; |
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| 138 | } |
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| 139 | |||
| 140 | while (size > 3) { |
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| 141 | unsigned int val = buf[off - init_off]; |
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| 142 | val |= (unsigned int) buf[off - init_off + 1] << 8; |
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| 143 | val |= (unsigned int) buf[off - init_off + 2] << 16; |
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| 144 | val |= (unsigned int) buf[off - init_off + 3] << 24; |
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| 145 | pci_write_config_dword(dev, off, val); |
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| 146 | off += 4; |
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| 147 | size -= 4; |
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| 148 | } |
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| 149 | |||
| 150 | while (size > 0) { |
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| 151 | pci_write_config_byte(dev, off, buf[off - init_off]); |
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| 152 | off++; |
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| 153 | --size; |
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| 154 | } |
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| 155 | |||
| 156 | return count; |
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| 157 | } |
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| 158 | |||
| 159 | static struct bin_attribute pci_config_attr = { |
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| 160 | .attr = { |
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| 161 | .name = "config", |
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| 162 | .mode = S_IRUGO | S_IWUSR, |
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| 163 | }, |
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| 164 | .size = 256, |
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| 165 | .read = pci_read_config, |
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| 166 | .write = pci_write_config, |
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| 167 | }; |
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| 168 | |||
| 169 | void pci_create_sysfs_dev_files (struct pci_dev *pdev) |
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| 170 | { |
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| 171 | struct device *dev = &pdev->dev; |
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| 172 | |||
| 173 | /* current configuration's attributes */ |
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| 174 | device_create_file (dev, &dev_attr_vendor); |
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| 175 | device_create_file (dev, &dev_attr_device); |
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| 176 | device_create_file (dev, &dev_attr_subsystem_vendor); |
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| 177 | device_create_file (dev, &dev_attr_subsystem_device); |
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| 178 | device_create_file (dev, &dev_attr_class); |
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| 179 | device_create_file (dev, &dev_attr_irq); |
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| 180 | device_create_file (dev, &dev_attr_resource); |
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| 181 | sysfs_create_bin_file(&dev->kobj, &pci_config_attr); |
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| 182 | } |