+++ /dev/null
-/*
- * $Id: proc.c,v 1.13 1998/05/12 07:36:07 mj Exp $
- *
- * Procfs interface for the PCI bus.
- *
- * Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz>
- */
-
-#include <xen/types.h>
-#include <xen/kernel.h>
-#include <xen/pci.h>
-#include <xen/proc_fs.h>
-#include <xen/init.h>
-#include <xen/seq_file.h>
-
-#include <asm/uaccess.h>
-#include <asm/byteorder.h>
-
-#define PCI_CFG_SPACE_SIZE 256
-
-static loff_t
-proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
-{
- loff_t new;
-
- switch (whence) {
- case 0:
- new = off;
- break;
- case 1:
- new = file->f_pos + off;
- break;
- case 2:
- new = PCI_CFG_SPACE_SIZE + off;
- break;
- default:
- return -EINVAL;
- }
- if (new < 0 || new > PCI_CFG_SPACE_SIZE)
- return -EINVAL;
- return (file->f_pos = new);
-}
-
-static ssize_t
-proc_bus_pci_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos)
-{
- const struct inode *ino = file->f_dentry->d_inode;
- const struct proc_dir_entry *dp = ino->u.generic_ip;
- struct pci_dev *dev = dp->data;
- unsigned int pos = *ppos;
- unsigned int cnt, size;
-
- /*
- * Normal users can read only the standardized portion of the
- * configuration space as several chips lock up when trying to read
- * undefined locations (think of Intel PIIX4 as a typical example).
- */
-
- if (capable(CAP_SYS_ADMIN))
- size = PCI_CFG_SPACE_SIZE;
- else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
- size = 128;
- else
- size = 64;
-
- if (pos >= size)
- return 0;
- if (nbytes >= size)
- nbytes = size;
- if (pos + nbytes > size)
- nbytes = size - pos;
- cnt = nbytes;
-
- if (!access_ok(VERIFY_WRITE, buf, cnt))
- return -EINVAL;
-
- if ((pos & 1) && cnt) {
- unsigned char val;
- pci_read_config_byte(dev, pos, &val);
- __put_user(val, buf);
- buf++;
- pos++;
- cnt--;
- }
-
- if ((pos & 3) && cnt > 2) {
- unsigned short val;
- pci_read_config_word(dev, pos, &val);
- __put_user(cpu_to_le16(val), (unsigned short *) buf);
- buf += 2;
- pos += 2;
- cnt -= 2;
- }
-
- while (cnt >= 4) {
- unsigned int val;
- pci_read_config_dword(dev, pos, &val);
- __put_user(cpu_to_le32(val), (unsigned int *) buf);
- buf += 4;
- pos += 4;
- cnt -= 4;
- }
-
- if (cnt >= 2) {
- unsigned short val;
- pci_read_config_word(dev, pos, &val);
- __put_user(cpu_to_le16(val), (unsigned short *) buf);
- buf += 2;
- pos += 2;
- cnt -= 2;
- }
-
- if (cnt) {
- unsigned char val;
- pci_read_config_byte(dev, pos, &val);
- __put_user(val, buf);
- buf++;
- pos++;
- cnt--;
- }
-
- *ppos = pos;
- return nbytes;
-}
-
-static ssize_t
-proc_bus_pci_write(struct file *file, const char *buf, size_t nbytes, loff_t *ppos)
-{
- const struct inode *ino = file->f_dentry->d_inode;
- const struct proc_dir_entry *dp = ino->u.generic_ip;
- struct pci_dev *dev = dp->data;
- int pos = *ppos;
- int cnt;
-
- if (pos >= PCI_CFG_SPACE_SIZE)
- return 0;
- if (nbytes >= PCI_CFG_SPACE_SIZE)
- nbytes = PCI_CFG_SPACE_SIZE;
- if (pos + nbytes > PCI_CFG_SPACE_SIZE)
- nbytes = PCI_CFG_SPACE_SIZE - pos;
- cnt = nbytes;
-
- if (!access_ok(VERIFY_READ, buf, cnt))
- return -EINVAL;
-
- if ((pos & 1) && cnt) {
- unsigned char val;
- __get_user(val, buf);
- pci_write_config_byte(dev, pos, val);
- buf++;
- pos++;
- cnt--;
- }
-
- if ((pos & 3) && cnt > 2) {
- unsigned short val;
- __get_user(val, (unsigned short *) buf);
- pci_write_config_word(dev, pos, le16_to_cpu(val));
- buf += 2;
- pos += 2;
- cnt -= 2;
- }
-
- while (cnt >= 4) {
- unsigned int val;
- __get_user(val, (unsigned int *) buf);
- pci_write_config_dword(dev, pos, le32_to_cpu(val));
- buf += 4;
- pos += 4;
- cnt -= 4;
- }
-
- if (cnt >= 2) {
- unsigned short val;
- __get_user(val, (unsigned short *) buf);
- pci_write_config_word(dev, pos, le16_to_cpu(val));
- buf += 2;
- pos += 2;
- cnt -= 2;
- }
-
- if (cnt) {
- unsigned char val;
- __get_user(val, buf);
- pci_write_config_byte(dev, pos, val);
- buf++;
- pos++;
- cnt--;
- }
-
- *ppos = pos;
- return nbytes;
-}
-
-struct pci_filp_private {
- enum pci_mmap_state mmap_state;
- int write_combine;
-};
-
-static int proc_bus_pci_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- const struct proc_dir_entry *dp = inode->u.generic_ip;
- struct pci_dev *dev = dp->data;
-#ifdef HAVE_PCI_MMAP
- struct pci_filp_private *fpriv = file->private_data;
-#endif /* HAVE_PCI_MMAP */
- int ret = 0;
-
- switch (cmd) {
- case PCIIOC_CONTROLLER:
- ret = pci_controller_num(dev);
- break;
-
-#ifdef HAVE_PCI_MMAP
- case PCIIOC_MMAP_IS_IO:
- fpriv->mmap_state = pci_mmap_io;
- break;
-
- case PCIIOC_MMAP_IS_MEM:
- fpriv->mmap_state = pci_mmap_mem;
- break;
-
- case PCIIOC_WRITE_COMBINE:
- if (arg)
- fpriv->write_combine = 1;
- else
- fpriv->write_combine = 0;
- break;
-
-#endif /* HAVE_PCI_MMAP */
-
- default:
- ret = -EINVAL;
- break;
- };
-
- return ret;
-}
-
-#ifdef HAVE_PCI_MMAP
-static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct inode *inode = file->f_dentry->d_inode;
- const struct proc_dir_entry *dp = inode->u.generic_ip;
- struct pci_dev *dev = dp->data;
- struct pci_filp_private *fpriv = file->private_data;
- int ret;
-
- if (!capable(CAP_SYS_RAWIO))
- return -EPERM;
-
- ret = pci_mmap_page_range(dev, vma,
- fpriv->mmap_state,
- fpriv->write_combine);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static int proc_bus_pci_open(struct inode *inode, struct file *file)
-{
- struct pci_filp_private *fpriv = kmalloc(sizeof(*fpriv), GFP_KERNEL);
-
- if (!fpriv)
- return -ENOMEM;
-
- fpriv->mmap_state = pci_mmap_io;
- fpriv->write_combine = 0;
-
- file->private_data = fpriv;
-
- return 0;
-}
-
-static int proc_bus_pci_release(struct inode *inode, struct file *file)
-{
- kfree(file->private_data);
- file->private_data = NULL;
-
- return 0;
-}
-#endif /* HAVE_PCI_MMAP */
-
-static struct file_operations proc_bus_pci_operations = {
- llseek: proc_bus_pci_lseek,
- read: proc_bus_pci_read,
- write: proc_bus_pci_write,
- ioctl: proc_bus_pci_ioctl,
-#ifdef HAVE_PCI_MMAP
- open: proc_bus_pci_open,
- release: proc_bus_pci_release,
- mmap: proc_bus_pci_mmap,
-#ifdef HAVE_ARCH_PCI_GET_UNMAPPED_AREA
- get_unmapped_area: get_pci_unmapped_area,
-#endif /* HAVE_ARCH_PCI_GET_UNMAPPED_AREA */
-#endif /* HAVE_PCI_MMAP */
-};
-
-#if BITS_PER_LONG == 32
-#define LONG_FORMAT "\t%08lx"
-#else
-#define LONG_FORMAT "\t%16lx"
-#endif
-
-/* iterator */
-static void *pci_seq_start(struct seq_file *m, loff_t *pos)
-{
- struct list_head *p = &pci_devices;
- loff_t n = *pos;
-
- /* XXX: surely we need some locking for traversing the list? */
- while (n--) {
- p = p->next;
- if (p == &pci_devices)
- return NULL;
- }
- return p;
-}
-static void *pci_seq_next(struct seq_file *m, void *v, loff_t *pos)
-{
- struct list_head *p = v;
- (*pos)++;
- return p->next != &pci_devices ? p->next : NULL;
-}
-static void pci_seq_stop(struct seq_file *m, void *v)
-{
- /* release whatever locks we need */
-}
-
-static int show_device(struct seq_file *m, void *v)
-{
- struct list_head *p = v;
- const struct pci_dev *dev;
- const struct pci_driver *drv;
- int i;
-
- if (p == &pci_devices)
- return 0;
-
- dev = pci_dev_g(p);
- drv = pci_dev_driver(dev);
- seq_printf(m, "%02x%02x\t%04x%04x\t%x",
- dev->bus->number,
- dev->devfn,
- dev->vendor,
- dev->device,
- dev->irq);
- /* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */
- for(i=0; i<7; i++)
- seq_printf(m, LONG_FORMAT,
- dev->resource[i].start |
- (dev->resource[i].flags & PCI_REGION_FLAG_MASK));
- for(i=0; i<7; i++)
- seq_printf(m, LONG_FORMAT,
- dev->resource[i].start < dev->resource[i].end ?
- dev->resource[i].end - dev->resource[i].start + 1 : 0);
- seq_putc(m, '\t');
- if (drv)
- seq_printf(m, "%s", drv->name);
- seq_putc(m, '\n');
- return 0;
-}
-
-static struct seq_operations proc_bus_pci_devices_op = {
- start: pci_seq_start,
- next: pci_seq_next,
- stop: pci_seq_stop,
- show: show_device
-};
-
-struct proc_dir_entry *proc_bus_pci_dir;
-
-int pci_proc_attach_device(struct pci_dev *dev)
-{
- struct pci_bus *bus = dev->bus;
- struct proc_dir_entry *de, *e;
- char name[16];
-
- if (!(de = bus->procdir)) {
- sprintf(name, "%02x", bus->number);
- de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
- if (!de)
- return -ENOMEM;
- }
- sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
- e = dev->procent = create_proc_entry(name, S_IFREG | S_IRUGO | S_IWUSR, de);
- if (!e)
- return -ENOMEM;
- e->proc_fops = &proc_bus_pci_operations;
- e->data = dev;
- e->size = PCI_CFG_SPACE_SIZE;
- return 0;
-}
-
-int pci_proc_detach_device(struct pci_dev *dev)
-{
- struct proc_dir_entry *e;
-
- if ((e = dev->procent)) {
- if (atomic_read(&e->count))
- return -EBUSY;
- remove_proc_entry(e->name, dev->bus->procdir);
- dev->procent = NULL;
- }
- return 0;
-}
-
-int pci_proc_attach_bus(struct pci_bus* bus)
-{
- struct proc_dir_entry *de = bus->procdir;
-
- if (!de) {
- char name[16];
- sprintf(name, "%02x", bus->number);
- de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
- if (!de)
- return -ENOMEM;
- }
- return 0;
-}
-
-int pci_proc_detach_bus(struct pci_bus* bus)
-{
- struct proc_dir_entry *de = bus->procdir;
- if (de)
- remove_proc_entry(de->name, proc_bus_pci_dir);
- return 0;
-}
-
-
-/*
- * Backward compatible /proc/pci interface.
- */
-
-/*
- * Convert some of the configuration space registers of the device at
- * address (bus,devfn) into a string (possibly several lines each).
- * The configuration string is stored starting at buf[len]. If the
- * string would exceed the size of the buffer (SIZE), 0 is returned.
- */
-static int show_dev_config(struct seq_file *m, void *v)
-{
- struct list_head *p = v;
- struct pci_dev *dev;
- struct pci_driver *drv;
- u32 class_rev;
- unsigned char latency, min_gnt, max_lat, *class;
- int reg;
-
- if (p == &pci_devices) {
- seq_puts(m, "PCI devices found:\n");
- return 0;
- }
-
- dev = pci_dev_g(p);
- drv = pci_dev_driver(dev);
-
- pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
- pci_read_config_byte (dev, PCI_LATENCY_TIMER, &latency);
- pci_read_config_byte (dev, PCI_MIN_GNT, &min_gnt);
- pci_read_config_byte (dev, PCI_MAX_LAT, &max_lat);
- seq_printf(m, " Bus %2d, device %3d, function %2d:\n",
- dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
- class = pci_class_name(class_rev >> 16);
- if (class)
- seq_printf(m, " %s", class);
- else
- seq_printf(m, " Class %04x", class_rev >> 16);
- seq_printf(m, ": %s (rev %d).\n", dev->name, class_rev & 0xff);
-
- if (dev->irq)
- seq_printf(m, " IRQ %d.\n", dev->irq);
-
- if (latency || min_gnt || max_lat) {
- seq_printf(m, " Master Capable. ");
- if (latency)
- seq_printf(m, "Latency=%d. ", latency);
- else
- seq_puts(m, "No bursts. ");
- if (min_gnt)
- seq_printf(m, "Min Gnt=%d.", min_gnt);
- if (max_lat)
- seq_printf(m, "Max Lat=%d.", max_lat);
- seq_putc(m, '\n');
- }
-
- for (reg = 0; reg < 6; reg++) {
- struct resource *res = dev->resource + reg;
- unsigned long base, end, flags;
-
- base = res->start;
- end = res->end;
- flags = res->flags;
- if (!end)
- continue;
-
- if (flags & PCI_BASE_ADDRESS_SPACE_IO) {
- seq_printf(m, " I/O at 0x%lx [0x%lx].\n",
- base, end);
- } else {
- const char *pref, *type = "unknown";
-
- if (flags & PCI_BASE_ADDRESS_MEM_PREFETCH)
- pref = "P";
- else
- pref = "Non-p";
- switch (flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK) {
- case PCI_BASE_ADDRESS_MEM_TYPE_32:
- type = "32 bit"; break;
- case PCI_BASE_ADDRESS_MEM_TYPE_1M:
- type = "20 bit"; break;
- case PCI_BASE_ADDRESS_MEM_TYPE_64:
- type = "64 bit"; break;
- }
- seq_printf(m, " %srefetchable %s memory at "
- "0x%lx [0x%lx].\n", pref, type,
- base,
- end);
- }
- }
- return 0;
-}
-
-static struct seq_operations proc_pci_op = {
- start: pci_seq_start,
- next: pci_seq_next,
- stop: pci_seq_stop,
- show: show_dev_config
-};
-
-static int proc_bus_pci_dev_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &proc_bus_pci_devices_op);
-}
-static struct file_operations proc_bus_pci_dev_operations = {
- open: proc_bus_pci_dev_open,
- read: seq_read,
- llseek: seq_lseek,
- release: seq_release,
-};
-static int proc_pci_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &proc_pci_op);
-}
-static struct file_operations proc_pci_operations = {
- open: proc_pci_open,
- read: seq_read,
- llseek: seq_lseek,
- release: seq_release,
-};
-
-static int __init pci_proc_init(void)
-{
- if (pci_present()) {
- struct proc_dir_entry *entry;
- struct pci_dev *dev;
- proc_bus_pci_dir = proc_mkdir("pci", proc_bus);
- entry = create_proc_entry("devices", 0, proc_bus_pci_dir);
- if (entry)
- entry->proc_fops = &proc_bus_pci_dev_operations;
- pci_for_each_dev(dev) {
- pci_proc_attach_device(dev);
- }
- entry = create_proc_entry("pci", 0, NULL);
- if (entry)
- entry->proc_fops = &proc_pci_operations;
- }
- return 0;
-}
-
-__initcall(pci_proc_init);
projects / xen.git / commitdiff