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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/pci/proc.c | |
download | kernel_samsung_espresso10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_espresso10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_espresso10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/pci/proc.c')
-rw-r--r-- | drivers/pci/proc.c | 619 |
1 files changed, 619 insertions, 0 deletions
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c new file mode 100644 index 0000000..84cc4f6 --- /dev/null +++ b/drivers/pci/proc.c @@ -0,0 +1,619 @@ +/* + * $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 <linux/init.h> +#include <linux/pci.h> +#include <linux/module.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/smp_lock.h> + +#include <asm/uaccess.h> +#include <asm/byteorder.h> + +static int proc_initialized; /* = 0 */ + +static loff_t +proc_bus_pci_lseek(struct file *file, loff_t off, int whence) +{ + loff_t new = -1; + struct inode *inode = file->f_dentry->d_inode; + + down(&inode->i_sem); + switch (whence) { + case 0: + new = off; + break; + case 1: + new = file->f_pos + off; + break; + case 2: + new = inode->i_size + off; + break; + } + if (new < 0 || new > inode->i_size) + new = -EINVAL; + else + file->f_pos = new; + up(&inode->i_sem); + return new; +} + +static ssize_t +proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) +{ + const struct inode *ino = file->f_dentry->d_inode; + const struct proc_dir_entry *dp = PDE(ino); + 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 = dev->cfg_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 __user *) 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 __user *) 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 __user *) 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 __user *buf, size_t nbytes, loff_t *ppos) +{ + const struct inode *ino = file->f_dentry->d_inode; + const struct proc_dir_entry *dp = PDE(ino); + struct pci_dev *dev = dp->data; + int pos = *ppos; + int size = dev->cfg_size; + int cnt; + + if (pos >= size) + return 0; + if (nbytes >= size) + nbytes = size; + if (pos + nbytes > size) + nbytes = 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 __user *) 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 __user *) 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 __user *) 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 = PDE(inode); + 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_domain_nr(dev->bus); + 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 = PDE(inode); + 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 pci_dev *dev = NULL; + loff_t n = *pos; + + for_each_pci_dev(dev) { + if (!n--) + break; + } + return dev; +} + +static void *pci_seq_next(struct seq_file *m, void *v, loff_t *pos) +{ + struct pci_dev *dev = v; + + (*pos)++; + dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev); + return dev; +} + +static void pci_seq_stop(struct seq_file *m, void *v) +{ + if (v) { + struct pci_dev *dev = v; + pci_dev_put(dev); + } +} + +static int show_device(struct seq_file *m, void *v) +{ + const struct pci_dev *dev = v; + const struct pci_driver *drv; + int i; + + if (dev == NULL) + return 0; + + 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 +}; + +static 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 *e; + char name[16]; + + if (!proc_initialized) + return -EACCES; + + if (!bus->procdir) { + if (pci_proc_domain(bus)) { + sprintf(name, "%04x:%02x", pci_domain_nr(bus), + bus->number); + } else { + sprintf(name, "%02x", bus->number); + } + bus->procdir = proc_mkdir(name, proc_bus_pci_dir); + if (!bus->procdir) + return -ENOMEM; + } + + sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); + e = create_proc_entry(name, S_IFREG | S_IRUGO | S_IWUSR, bus->procdir); + if (!e) + return -ENOMEM; + e->proc_fops = &proc_bus_pci_operations; + e->data = dev; + e->size = dev->cfg_size; + dev->procent = e; + + 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 (!proc_initialized) + return -EACCES; + + 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; +} + +#ifdef CONFIG_PCI_LEGACY_PROC + +/* + * 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 pci_dev *dev = v; + struct pci_dev *first_dev; + struct pci_driver *drv; + u32 class_rev; + unsigned char latency, min_gnt, max_lat, *class; + int reg; + + first_dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); + if (dev == first_dev) + seq_puts(m, "PCI devices found:\n"); + pci_dev_put(first_dev); + + 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); +#ifdef CONFIG_PCI_NAMES + seq_printf(m, ": %s", dev->pretty_name); +#else + seq_printf(m, ": PCI device %04x:%04x", dev->vendor, dev->device); +#endif + seq_printf(m, " (rev %d).\n", 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_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 void legacy_proc_init(void) +{ + struct proc_dir_entry * entry = create_proc_entry("pci", 0, NULL); + if (entry) + entry->proc_fops = &proc_pci_operations; +} + +#else + +static void legacy_proc_init(void) +{ + +} + +#endif /* CONFIG_PCI_LEGACY_PROC */ + +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 __init pci_proc_init(void) +{ + struct proc_dir_entry *entry; + struct pci_dev *dev = NULL; + 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; + proc_initialized = 1; + while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { + pci_proc_attach_device(dev); + } + legacy_proc_init(); + return 0; +} + +__initcall(pci_proc_init); + +#ifdef CONFIG_HOTPLUG +EXPORT_SYMBOL(pci_proc_attach_device); +EXPORT_SYMBOL(pci_proc_attach_bus); +EXPORT_SYMBOL(pci_proc_detach_bus); +#endif + |