11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * $Id: proc.c,v 1.13 1998/05/12 07:36:07 mj Exp $ 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Procfs interface for the PCI bus. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz> 71da177e4SLinus Torvalds */ 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds #include <linux/init.h> 101da177e4SLinus Torvalds #include <linux/pci.h> 111da177e4SLinus Torvalds #include <linux/module.h> 121da177e4SLinus Torvalds #include <linux/proc_fs.h> 131da177e4SLinus Torvalds #include <linux/seq_file.h> 141da177e4SLinus Torvalds #include <linux/smp_lock.h> 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <asm/uaccess.h> 171da177e4SLinus Torvalds #include <asm/byteorder.h> 18bc56b9e0SGreg KH #include "pci.h" 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds static int proc_initialized; /* = 0 */ 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds static loff_t 231da177e4SLinus Torvalds proc_bus_pci_lseek(struct file *file, loff_t off, int whence) 241da177e4SLinus Torvalds { 251da177e4SLinus Torvalds loff_t new = -1; 261da177e4SLinus Torvalds struct inode *inode = file->f_dentry->d_inode; 271da177e4SLinus Torvalds 281b1dcc1bSJes Sorensen mutex_lock(&inode->i_mutex); 291da177e4SLinus Torvalds switch (whence) { 301da177e4SLinus Torvalds case 0: 311da177e4SLinus Torvalds new = off; 321da177e4SLinus Torvalds break; 331da177e4SLinus Torvalds case 1: 341da177e4SLinus Torvalds new = file->f_pos + off; 351da177e4SLinus Torvalds break; 361da177e4SLinus Torvalds case 2: 371da177e4SLinus Torvalds new = inode->i_size + off; 381da177e4SLinus Torvalds break; 391da177e4SLinus Torvalds } 401da177e4SLinus Torvalds if (new < 0 || new > inode->i_size) 411da177e4SLinus Torvalds new = -EINVAL; 421da177e4SLinus Torvalds else 431da177e4SLinus Torvalds file->f_pos = new; 441b1dcc1bSJes Sorensen mutex_unlock(&inode->i_mutex); 451da177e4SLinus Torvalds return new; 461da177e4SLinus Torvalds } 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds static ssize_t 491da177e4SLinus Torvalds proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) 501da177e4SLinus Torvalds { 511da177e4SLinus Torvalds const struct inode *ino = file->f_dentry->d_inode; 521da177e4SLinus Torvalds const struct proc_dir_entry *dp = PDE(ino); 531da177e4SLinus Torvalds struct pci_dev *dev = dp->data; 541da177e4SLinus Torvalds unsigned int pos = *ppos; 551da177e4SLinus Torvalds unsigned int cnt, size; 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* 581da177e4SLinus Torvalds * Normal users can read only the standardized portion of the 591da177e4SLinus Torvalds * configuration space as several chips lock up when trying to read 601da177e4SLinus Torvalds * undefined locations (think of Intel PIIX4 as a typical example). 611da177e4SLinus Torvalds */ 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds if (capable(CAP_SYS_ADMIN)) 641da177e4SLinus Torvalds size = dev->cfg_size; 651da177e4SLinus Torvalds else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) 661da177e4SLinus Torvalds size = 128; 671da177e4SLinus Torvalds else 681da177e4SLinus Torvalds size = 64; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds if (pos >= size) 711da177e4SLinus Torvalds return 0; 721da177e4SLinus Torvalds if (nbytes >= size) 731da177e4SLinus Torvalds nbytes = size; 741da177e4SLinus Torvalds if (pos + nbytes > size) 751da177e4SLinus Torvalds nbytes = size - pos; 761da177e4SLinus Torvalds cnt = nbytes; 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds if (!access_ok(VERIFY_WRITE, buf, cnt)) 791da177e4SLinus Torvalds return -EINVAL; 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds if ((pos & 1) && cnt) { 821da177e4SLinus Torvalds unsigned char val; 83e04b0ea2SBrian King pci_user_read_config_byte(dev, pos, &val); 841da177e4SLinus Torvalds __put_user(val, buf); 851da177e4SLinus Torvalds buf++; 861da177e4SLinus Torvalds pos++; 871da177e4SLinus Torvalds cnt--; 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds if ((pos & 3) && cnt > 2) { 911da177e4SLinus Torvalds unsigned short val; 92e04b0ea2SBrian King pci_user_read_config_word(dev, pos, &val); 931da177e4SLinus Torvalds __put_user(cpu_to_le16(val), (unsigned short __user *) buf); 941da177e4SLinus Torvalds buf += 2; 951da177e4SLinus Torvalds pos += 2; 961da177e4SLinus Torvalds cnt -= 2; 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds while (cnt >= 4) { 1001da177e4SLinus Torvalds unsigned int val; 101e04b0ea2SBrian King pci_user_read_config_dword(dev, pos, &val); 1021da177e4SLinus Torvalds __put_user(cpu_to_le32(val), (unsigned int __user *) buf); 1031da177e4SLinus Torvalds buf += 4; 1041da177e4SLinus Torvalds pos += 4; 1051da177e4SLinus Torvalds cnt -= 4; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds if (cnt >= 2) { 1091da177e4SLinus Torvalds unsigned short val; 110e04b0ea2SBrian King pci_user_read_config_word(dev, pos, &val); 1111da177e4SLinus Torvalds __put_user(cpu_to_le16(val), (unsigned short __user *) buf); 1121da177e4SLinus Torvalds buf += 2; 1131da177e4SLinus Torvalds pos += 2; 1141da177e4SLinus Torvalds cnt -= 2; 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds if (cnt) { 1181da177e4SLinus Torvalds unsigned char val; 119e04b0ea2SBrian King pci_user_read_config_byte(dev, pos, &val); 1201da177e4SLinus Torvalds __put_user(val, buf); 1211da177e4SLinus Torvalds buf++; 1221da177e4SLinus Torvalds pos++; 1231da177e4SLinus Torvalds cnt--; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds *ppos = pos; 1271da177e4SLinus Torvalds return nbytes; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds static ssize_t 1311da177e4SLinus Torvalds proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, loff_t *ppos) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds const struct inode *ino = file->f_dentry->d_inode; 1341da177e4SLinus Torvalds const struct proc_dir_entry *dp = PDE(ino); 1351da177e4SLinus Torvalds struct pci_dev *dev = dp->data; 1361da177e4SLinus Torvalds int pos = *ppos; 1371da177e4SLinus Torvalds int size = dev->cfg_size; 1381da177e4SLinus Torvalds int cnt; 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds if (pos >= size) 1411da177e4SLinus Torvalds return 0; 1421da177e4SLinus Torvalds if (nbytes >= size) 1431da177e4SLinus Torvalds nbytes = size; 1441da177e4SLinus Torvalds if (pos + nbytes > size) 1451da177e4SLinus Torvalds nbytes = size - pos; 1461da177e4SLinus Torvalds cnt = nbytes; 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds if (!access_ok(VERIFY_READ, buf, cnt)) 1491da177e4SLinus Torvalds return -EINVAL; 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds if ((pos & 1) && cnt) { 1521da177e4SLinus Torvalds unsigned char val; 1531da177e4SLinus Torvalds __get_user(val, buf); 154e04b0ea2SBrian King pci_user_write_config_byte(dev, pos, val); 1551da177e4SLinus Torvalds buf++; 1561da177e4SLinus Torvalds pos++; 1571da177e4SLinus Torvalds cnt--; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds if ((pos & 3) && cnt > 2) { 1611da177e4SLinus Torvalds unsigned short val; 1621da177e4SLinus Torvalds __get_user(val, (unsigned short __user *) buf); 163e04b0ea2SBrian King pci_user_write_config_word(dev, pos, le16_to_cpu(val)); 1641da177e4SLinus Torvalds buf += 2; 1651da177e4SLinus Torvalds pos += 2; 1661da177e4SLinus Torvalds cnt -= 2; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds while (cnt >= 4) { 1701da177e4SLinus Torvalds unsigned int val; 1711da177e4SLinus Torvalds __get_user(val, (unsigned int __user *) buf); 172e04b0ea2SBrian King pci_user_write_config_dword(dev, pos, le32_to_cpu(val)); 1731da177e4SLinus Torvalds buf += 4; 1741da177e4SLinus Torvalds pos += 4; 1751da177e4SLinus Torvalds cnt -= 4; 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds if (cnt >= 2) { 1791da177e4SLinus Torvalds unsigned short val; 1801da177e4SLinus Torvalds __get_user(val, (unsigned short __user *) buf); 181e04b0ea2SBrian King pci_user_write_config_word(dev, pos, le16_to_cpu(val)); 1821da177e4SLinus Torvalds buf += 2; 1831da177e4SLinus Torvalds pos += 2; 1841da177e4SLinus Torvalds cnt -= 2; 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds if (cnt) { 1881da177e4SLinus Torvalds unsigned char val; 1891da177e4SLinus Torvalds __get_user(val, buf); 190e04b0ea2SBrian King pci_user_write_config_byte(dev, pos, val); 1911da177e4SLinus Torvalds buf++; 1921da177e4SLinus Torvalds pos++; 1931da177e4SLinus Torvalds cnt--; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds *ppos = pos; 1971da177e4SLinus Torvalds return nbytes; 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds struct pci_filp_private { 2011da177e4SLinus Torvalds enum pci_mmap_state mmap_state; 2021da177e4SLinus Torvalds int write_combine; 2031da177e4SLinus Torvalds }; 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds static int proc_bus_pci_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 2061da177e4SLinus Torvalds { 2071da177e4SLinus Torvalds const struct proc_dir_entry *dp = PDE(inode); 2081da177e4SLinus Torvalds struct pci_dev *dev = dp->data; 2091da177e4SLinus Torvalds #ifdef HAVE_PCI_MMAP 2101da177e4SLinus Torvalds struct pci_filp_private *fpriv = file->private_data; 2111da177e4SLinus Torvalds #endif /* HAVE_PCI_MMAP */ 2121da177e4SLinus Torvalds int ret = 0; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds switch (cmd) { 2151da177e4SLinus Torvalds case PCIIOC_CONTROLLER: 2161da177e4SLinus Torvalds ret = pci_domain_nr(dev->bus); 2171da177e4SLinus Torvalds break; 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds #ifdef HAVE_PCI_MMAP 2201da177e4SLinus Torvalds case PCIIOC_MMAP_IS_IO: 2211da177e4SLinus Torvalds fpriv->mmap_state = pci_mmap_io; 2221da177e4SLinus Torvalds break; 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds case PCIIOC_MMAP_IS_MEM: 2251da177e4SLinus Torvalds fpriv->mmap_state = pci_mmap_mem; 2261da177e4SLinus Torvalds break; 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds case PCIIOC_WRITE_COMBINE: 2291da177e4SLinus Torvalds if (arg) 2301da177e4SLinus Torvalds fpriv->write_combine = 1; 2311da177e4SLinus Torvalds else 2321da177e4SLinus Torvalds fpriv->write_combine = 0; 2331da177e4SLinus Torvalds break; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds #endif /* HAVE_PCI_MMAP */ 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds default: 2381da177e4SLinus Torvalds ret = -EINVAL; 2391da177e4SLinus Torvalds break; 2401da177e4SLinus Torvalds }; 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds return ret; 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds #ifdef HAVE_PCI_MMAP 2461da177e4SLinus Torvalds static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma) 2471da177e4SLinus Torvalds { 2481da177e4SLinus Torvalds struct inode *inode = file->f_dentry->d_inode; 2491da177e4SLinus Torvalds const struct proc_dir_entry *dp = PDE(inode); 2501da177e4SLinus Torvalds struct pci_dev *dev = dp->data; 2511da177e4SLinus Torvalds struct pci_filp_private *fpriv = file->private_data; 2521da177e4SLinus Torvalds int ret; 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds if (!capable(CAP_SYS_RAWIO)) 2551da177e4SLinus Torvalds return -EPERM; 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds ret = pci_mmap_page_range(dev, vma, 2581da177e4SLinus Torvalds fpriv->mmap_state, 2591da177e4SLinus Torvalds fpriv->write_combine); 2601da177e4SLinus Torvalds if (ret < 0) 2611da177e4SLinus Torvalds return ret; 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds return 0; 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds static int proc_bus_pci_open(struct inode *inode, struct file *file) 2671da177e4SLinus Torvalds { 2681da177e4SLinus Torvalds struct pci_filp_private *fpriv = kmalloc(sizeof(*fpriv), GFP_KERNEL); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds if (!fpriv) 2711da177e4SLinus Torvalds return -ENOMEM; 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds fpriv->mmap_state = pci_mmap_io; 2741da177e4SLinus Torvalds fpriv->write_combine = 0; 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds file->private_data = fpriv; 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds return 0; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds static int proc_bus_pci_release(struct inode *inode, struct file *file) 2821da177e4SLinus Torvalds { 2831da177e4SLinus Torvalds kfree(file->private_data); 2841da177e4SLinus Torvalds file->private_data = NULL; 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds return 0; 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds #endif /* HAVE_PCI_MMAP */ 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds static struct file_operations proc_bus_pci_operations = { 2911da177e4SLinus Torvalds .llseek = proc_bus_pci_lseek, 2921da177e4SLinus Torvalds .read = proc_bus_pci_read, 2931da177e4SLinus Torvalds .write = proc_bus_pci_write, 2941da177e4SLinus Torvalds .ioctl = proc_bus_pci_ioctl, 2951da177e4SLinus Torvalds #ifdef HAVE_PCI_MMAP 2961da177e4SLinus Torvalds .open = proc_bus_pci_open, 2971da177e4SLinus Torvalds .release = proc_bus_pci_release, 2981da177e4SLinus Torvalds .mmap = proc_bus_pci_mmap, 2991da177e4SLinus Torvalds #ifdef HAVE_ARCH_PCI_GET_UNMAPPED_AREA 3001da177e4SLinus Torvalds .get_unmapped_area = get_pci_unmapped_area, 3011da177e4SLinus Torvalds #endif /* HAVE_ARCH_PCI_GET_UNMAPPED_AREA */ 3021da177e4SLinus Torvalds #endif /* HAVE_PCI_MMAP */ 3031da177e4SLinus Torvalds }; 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds /* iterator */ 3061da177e4SLinus Torvalds static void *pci_seq_start(struct seq_file *m, loff_t *pos) 3071da177e4SLinus Torvalds { 3081da177e4SLinus Torvalds struct pci_dev *dev = NULL; 3091da177e4SLinus Torvalds loff_t n = *pos; 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds for_each_pci_dev(dev) { 3121da177e4SLinus Torvalds if (!n--) 3131da177e4SLinus Torvalds break; 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds return dev; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds static void *pci_seq_next(struct seq_file *m, void *v, loff_t *pos) 3191da177e4SLinus Torvalds { 3201da177e4SLinus Torvalds struct pci_dev *dev = v; 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds (*pos)++; 3231da177e4SLinus Torvalds dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev); 3241da177e4SLinus Torvalds return dev; 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds static void pci_seq_stop(struct seq_file *m, void *v) 3281da177e4SLinus Torvalds { 3291da177e4SLinus Torvalds if (v) { 3301da177e4SLinus Torvalds struct pci_dev *dev = v; 3311da177e4SLinus Torvalds pci_dev_put(dev); 3321da177e4SLinus Torvalds } 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds static int show_device(struct seq_file *m, void *v) 3361da177e4SLinus Torvalds { 3371da177e4SLinus Torvalds const struct pci_dev *dev = v; 3381da177e4SLinus Torvalds const struct pci_driver *drv; 3391da177e4SLinus Torvalds int i; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds if (dev == NULL) 3421da177e4SLinus Torvalds return 0; 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds drv = pci_dev_driver(dev); 3451da177e4SLinus Torvalds seq_printf(m, "%02x%02x\t%04x%04x\t%x", 3461da177e4SLinus Torvalds dev->bus->number, 3471da177e4SLinus Torvalds dev->devfn, 3481da177e4SLinus Torvalds dev->vendor, 3491da177e4SLinus Torvalds dev->device, 3501da177e4SLinus Torvalds dev->irq); 3511da177e4SLinus Torvalds /* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */ 3522311b1f2SMichael Ellerman for (i=0; i<7; i++) { 3532311b1f2SMichael Ellerman u64 start, end; 3542311b1f2SMichael Ellerman pci_resource_to_user(dev, i, &dev->resource[i], &start, &end); 355*1396a8c3SGreg Kroah-Hartman seq_printf(m, "\t%16llx", 356*1396a8c3SGreg Kroah-Hartman (unsigned long long)(start | 357*1396a8c3SGreg Kroah-Hartman (dev->resource[i].flags & PCI_REGION_FLAG_MASK))); 3582311b1f2SMichael Ellerman } 3592311b1f2SMichael Ellerman for (i=0; i<7; i++) { 3602311b1f2SMichael Ellerman u64 start, end; 3612311b1f2SMichael Ellerman pci_resource_to_user(dev, i, &dev->resource[i], &start, &end); 362*1396a8c3SGreg Kroah-Hartman seq_printf(m, "\t%16llx", 3631da177e4SLinus Torvalds dev->resource[i].start < dev->resource[i].end ? 364*1396a8c3SGreg Kroah-Hartman (unsigned long long)(end - start) + 1 : 0); 3652311b1f2SMichael Ellerman } 3661da177e4SLinus Torvalds seq_putc(m, '\t'); 3671da177e4SLinus Torvalds if (drv) 3681da177e4SLinus Torvalds seq_printf(m, "%s", drv->name); 3691da177e4SLinus Torvalds seq_putc(m, '\n'); 3701da177e4SLinus Torvalds return 0; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds static struct seq_operations proc_bus_pci_devices_op = { 3741da177e4SLinus Torvalds .start = pci_seq_start, 3751da177e4SLinus Torvalds .next = pci_seq_next, 3761da177e4SLinus Torvalds .stop = pci_seq_stop, 3771da177e4SLinus Torvalds .show = show_device 3781da177e4SLinus Torvalds }; 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds static struct proc_dir_entry *proc_bus_pci_dir; 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds int pci_proc_attach_device(struct pci_dev *dev) 3831da177e4SLinus Torvalds { 3841da177e4SLinus Torvalds struct pci_bus *bus = dev->bus; 3851da177e4SLinus Torvalds struct proc_dir_entry *e; 3861da177e4SLinus Torvalds char name[16]; 3871da177e4SLinus Torvalds 3881da177e4SLinus Torvalds if (!proc_initialized) 3891da177e4SLinus Torvalds return -EACCES; 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds if (!bus->procdir) { 3921da177e4SLinus Torvalds if (pci_proc_domain(bus)) { 3931da177e4SLinus Torvalds sprintf(name, "%04x:%02x", pci_domain_nr(bus), 3941da177e4SLinus Torvalds bus->number); 3951da177e4SLinus Torvalds } else { 3961da177e4SLinus Torvalds sprintf(name, "%02x", bus->number); 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds bus->procdir = proc_mkdir(name, proc_bus_pci_dir); 3991da177e4SLinus Torvalds if (!bus->procdir) 4001da177e4SLinus Torvalds return -ENOMEM; 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); 4041da177e4SLinus Torvalds e = create_proc_entry(name, S_IFREG | S_IRUGO | S_IWUSR, bus->procdir); 4051da177e4SLinus Torvalds if (!e) 4061da177e4SLinus Torvalds return -ENOMEM; 4071da177e4SLinus Torvalds e->proc_fops = &proc_bus_pci_operations; 4081da177e4SLinus Torvalds e->data = dev; 4091da177e4SLinus Torvalds e->size = dev->cfg_size; 4101da177e4SLinus Torvalds dev->procent = e; 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds return 0; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds int pci_proc_detach_device(struct pci_dev *dev) 4161da177e4SLinus Torvalds { 4171da177e4SLinus Torvalds struct proc_dir_entry *e; 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds if ((e = dev->procent)) { 4201da177e4SLinus Torvalds if (atomic_read(&e->count)) 4211da177e4SLinus Torvalds return -EBUSY; 4221da177e4SLinus Torvalds remove_proc_entry(e->name, dev->bus->procdir); 4231da177e4SLinus Torvalds dev->procent = NULL; 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds return 0; 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 42854c762feSAdrian Bunk #if 0 4291da177e4SLinus Torvalds int pci_proc_attach_bus(struct pci_bus* bus) 4301da177e4SLinus Torvalds { 4311da177e4SLinus Torvalds struct proc_dir_entry *de = bus->procdir; 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds if (!proc_initialized) 4341da177e4SLinus Torvalds return -EACCES; 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds if (!de) { 4371da177e4SLinus Torvalds char name[16]; 4381da177e4SLinus Torvalds sprintf(name, "%02x", bus->number); 4391da177e4SLinus Torvalds de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir); 4401da177e4SLinus Torvalds if (!de) 4411da177e4SLinus Torvalds return -ENOMEM; 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds return 0; 4441da177e4SLinus Torvalds } 44554c762feSAdrian Bunk #endif /* 0 */ 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds int pci_proc_detach_bus(struct pci_bus* bus) 4481da177e4SLinus Torvalds { 4491da177e4SLinus Torvalds struct proc_dir_entry *de = bus->procdir; 4501da177e4SLinus Torvalds if (de) 4511da177e4SLinus Torvalds remove_proc_entry(de->name, proc_bus_pci_dir); 4521da177e4SLinus Torvalds return 0; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds static int proc_bus_pci_dev_open(struct inode *inode, struct file *file) 4561da177e4SLinus Torvalds { 4571da177e4SLinus Torvalds return seq_open(file, &proc_bus_pci_devices_op); 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds static struct file_operations proc_bus_pci_dev_operations = { 4601da177e4SLinus Torvalds .open = proc_bus_pci_dev_open, 4611da177e4SLinus Torvalds .read = seq_read, 4621da177e4SLinus Torvalds .llseek = seq_lseek, 4631da177e4SLinus Torvalds .release = seq_release, 4641da177e4SLinus Torvalds }; 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds static int __init pci_proc_init(void) 4671da177e4SLinus Torvalds { 4681da177e4SLinus Torvalds struct proc_dir_entry *entry; 4691da177e4SLinus Torvalds struct pci_dev *dev = NULL; 4701da177e4SLinus Torvalds proc_bus_pci_dir = proc_mkdir("pci", proc_bus); 4711da177e4SLinus Torvalds entry = create_proc_entry("devices", 0, proc_bus_pci_dir); 4721da177e4SLinus Torvalds if (entry) 4731da177e4SLinus Torvalds entry->proc_fops = &proc_bus_pci_dev_operations; 4741da177e4SLinus Torvalds proc_initialized = 1; 4751da177e4SLinus Torvalds while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { 4761da177e4SLinus Torvalds pci_proc_attach_device(dev); 4771da177e4SLinus Torvalds } 4781da177e4SLinus Torvalds return 0; 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds __initcall(pci_proc_init); 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds #ifdef CONFIG_HOTPLUG 4841da177e4SLinus Torvalds EXPORT_SYMBOL(pci_proc_attach_device); 4851da177e4SLinus Torvalds EXPORT_SYMBOL(pci_proc_detach_bus); 4861da177e4SLinus Torvalds #endif 4871da177e4SLinus Torvalds 488