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!
diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c
new file mode 100644
index 0000000..58ed337
--- /dev/null
+++ b/drivers/sbus/char/openprom.c
@@ -0,0 +1,630 @@
+/*
+ * Linux/SPARC PROM Configuration Driver
+ * Copyright (C) 1996 Thomas K. Dyas (tdyas@noc.rutgers.edu)
+ * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
+ *
+ * This character device driver allows user programs to access the
+ * PROM device tree. It is compatible with the SunOS /dev/openprom
+ * driver and the NetBSD /dev/openprom driver. The SunOS eeprom
+ * utility works without any modifications.
+ *
+ * The driver uses a minor number under the misc device major. The
+ * file read/write mode determines the type of access to the PROM.
+ * Interrupts are disabled whenever the driver calls into the PROM for
+ * sanity's sake.
+ */
+
+/* This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define PROMLIB_INTERNAL
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/miscdevice.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <asm/oplib.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/openpromio.h>
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#include <asm/pbm.h>
+#endif
+
+/* Private data kept by the driver for each descriptor. */
+typedef struct openprom_private_data
+{
+ int current_node; /* Current node for SunOS ioctls. */
+ int lastnode; /* Last valid node used by BSD ioctls. */
+} DATA;
+
+/* ID of the PROM node containing all of the EEPROM options. */
+static int options_node = 0;
+
+/*
+ * Copy an openpromio structure into kernel space from user space.
+ * This routine does error checking to make sure that all memory
+ * accesses are within bounds. A pointer to the allocated openpromio
+ * structure will be placed in "*opp_p". Return value is the length
+ * of the user supplied buffer.
+ */
+static int copyin(struct openpromio __user *info, struct openpromio **opp_p)
+{
+ unsigned int bufsize;
+
+ if (!info || !opp_p)
+ return -EFAULT;
+
+ if (get_user(bufsize, &info->oprom_size))
+ return -EFAULT;
+
+ if (bufsize == 0)
+ return -EINVAL;
+
+ /* If the bufsize is too large, just limit it.
+ * Fix from Jason Rappleye.
+ */
+ if (bufsize > OPROMMAXPARAM)
+ bufsize = OPROMMAXPARAM;
+
+ if (!(*opp_p = kmalloc(sizeof(int) + bufsize + 1, GFP_KERNEL)))
+ return -ENOMEM;
+ memset(*opp_p, 0, sizeof(int) + bufsize + 1);
+
+ if (copy_from_user(&(*opp_p)->oprom_array,
+ &info->oprom_array, bufsize)) {
+ kfree(*opp_p);
+ return -EFAULT;
+ }
+ return bufsize;
+}
+
+static int getstrings(struct openpromio __user *info, struct openpromio **opp_p)
+{
+ int n, bufsize;
+ char c;
+
+ if (!info || !opp_p)
+ return -EFAULT;
+
+ if (!(*opp_p = kmalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL)))
+ return -ENOMEM;
+
+ memset(*opp_p, 0, sizeof(int) + OPROMMAXPARAM + 1);
+ (*opp_p)->oprom_size = 0;
+
+ n = bufsize = 0;
+ while ((n < 2) && (bufsize < OPROMMAXPARAM)) {
+ if (get_user(c, &info->oprom_array[bufsize])) {
+ kfree(*opp_p);
+ return -EFAULT;
+ }
+ if (c == '\0')
+ n++;
+ (*opp_p)->oprom_array[bufsize++] = c;
+ }
+ if (!n) {
+ kfree(*opp_p);
+ return -EINVAL;
+ }
+ return bufsize;
+}
+
+/*
+ * Copy an openpromio structure in kernel space back to user space.
+ */
+static int copyout(void __user *info, struct openpromio *opp, int len)
+{
+ if (copy_to_user(info, opp, len))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * SunOS and Solaris /dev/openprom ioctl calls.
+ */
+static int openprom_sunos_ioctl(struct inode * inode, struct file * file,
+ unsigned int cmd, unsigned long arg, int node)
+{
+ DATA *data = (DATA *) file->private_data;
+ char buffer[OPROMMAXPARAM+1], *buf;
+ struct openpromio *opp;
+ int bufsize, len, error = 0;
+ static int cnt;
+ void __user *argp = (void __user *)arg;
+
+ if (cmd == OPROMSETOPT)
+ bufsize = getstrings(argp, &opp);
+ else
+ bufsize = copyin(argp, &opp);
+
+ if (bufsize < 0)
+ return bufsize;
+
+ switch (cmd) {
+ case OPROMGETOPT:
+ case OPROMGETPROP:
+ len = prom_getproplen(node, opp->oprom_array);
+
+ if (len <= 0 || len > bufsize) {
+ error = copyout(argp, opp, sizeof(int));
+ break;
+ }
+
+ len = prom_getproperty(node, opp->oprom_array, buffer, bufsize);
+
+ memcpy(opp->oprom_array, buffer, len);
+ opp->oprom_array[len] = '\0';
+ opp->oprom_size = len;
+
+ error = copyout(argp, opp, sizeof(int) + bufsize);
+ break;
+
+ case OPROMNXTOPT:
+ case OPROMNXTPROP:
+ buf = prom_nextprop(node, opp->oprom_array, buffer);
+
+ len = strlen(buf);
+ if (len == 0 || len + 1 > bufsize) {
+ error = copyout(argp, opp, sizeof(int));
+ break;
+ }
+
+ memcpy(opp->oprom_array, buf, len);
+ opp->oprom_array[len] = '\0';
+ opp->oprom_size = ++len;
+
+ error = copyout(argp, opp, sizeof(int) + bufsize);
+ break;
+
+ case OPROMSETOPT:
+ case OPROMSETOPT2:
+ buf = opp->oprom_array + strlen(opp->oprom_array) + 1;
+ len = opp->oprom_array + bufsize - buf;
+
+ error = prom_setprop(options_node, opp->oprom_array,
+ buf, len);
+
+ if (error < 0)
+ error = -EINVAL;
+ break;
+
+ case OPROMNEXT:
+ case OPROMCHILD:
+ case OPROMSETCUR:
+ if (bufsize < sizeof(int)) {
+ error = -EINVAL;
+ break;
+ }
+
+ node = *((int *) opp->oprom_array);
+
+ switch (cmd) {
+ case OPROMNEXT: node = __prom_getsibling(node); break;
+ case OPROMCHILD: node = __prom_getchild(node); break;
+ case OPROMSETCUR: break;
+ }
+
+ data->current_node = node;
+ *((int *)opp->oprom_array) = node;
+ opp->oprom_size = sizeof(int);
+
+ error = copyout(argp, opp, bufsize + sizeof(int));
+ break;
+
+ case OPROMPCI2NODE:
+ error = -EINVAL;
+
+ if (bufsize >= 2*sizeof(int)) {
+#ifdef CONFIG_PCI
+ struct pci_dev *pdev;
+ struct pcidev_cookie *pcp;
+ pdev = pci_find_slot (((int *) opp->oprom_array)[0],
+ ((int *) opp->oprom_array)[1]);
+
+ pcp = pdev->sysdata;
+ if (pcp != NULL && pcp->prom_node != -1 && pcp->prom_node) {
+ node = pcp->prom_node;
+ data->current_node = node;
+ *((int *)opp->oprom_array) = node;
+ opp->oprom_size = sizeof(int);
+ error = copyout(argp, opp, bufsize + sizeof(int));
+ }
+#endif
+ }
+ break;
+
+ case OPROMPATH2NODE:
+ node = prom_finddevice(opp->oprom_array);
+ data->current_node = node;
+ *((int *)opp->oprom_array) = node;
+ opp->oprom_size = sizeof(int);
+
+ error = copyout(argp, opp, bufsize + sizeof(int));
+ break;
+
+ case OPROMGETBOOTARGS:
+ buf = saved_command_line;
+
+ len = strlen(buf);
+
+ if (len > bufsize) {
+ error = -EINVAL;
+ break;
+ }
+
+ strcpy(opp->oprom_array, buf);
+ opp->oprom_size = len;
+
+ error = copyout(argp, opp, bufsize + sizeof(int));
+ break;
+
+ case OPROMU2P:
+ case OPROMGETCONS:
+ case OPROMGETFBNAME:
+ if (cnt++ < 10)
+ printk(KERN_INFO "openprom_sunos_ioctl: unimplemented ioctl\n");
+ error = -EINVAL;
+ break;
+ default:
+ if (cnt++ < 10)
+ printk(KERN_INFO "openprom_sunos_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg);
+ error = -EINVAL;
+ break;
+ }
+
+ kfree(opp);
+ return error;
+}
+
+
+/* Return nonzero if a specific node is in the PROM device tree. */
+static int intree(int root, int node)
+{
+ for (; root != 0; root = prom_getsibling(root))
+ if (root == node || intree(prom_getchild(root),node))
+ return 1;
+ return 0;
+}
+
+/* Return nonzero if a specific node is "valid". */
+static int goodnode(int n, DATA *data)
+{
+ if (n == data->lastnode || n == prom_root_node || n == options_node)
+ return 1;
+ if (n == 0 || n == -1 || !intree(prom_root_node,n))
+ return 0;
+ data->lastnode = n;
+ return 1;
+}
+
+/* Copy in a whole string from userspace into kernelspace. */
+static int copyin_string(char __user *user, size_t len, char **ptr)
+{
+ char *tmp;
+
+ if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0)
+ return -EINVAL;
+
+ tmp = kmalloc(len + 1, GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ if(copy_from_user(tmp, user, len)) {
+ kfree(tmp);
+ return -EFAULT;
+ }
+
+ tmp[len] = '\0';
+
+ *ptr = tmp;
+
+ return 0;
+}
+
+/*
+ * NetBSD /dev/openprom ioctl calls.
+ */
+static int openprom_bsd_ioctl(struct inode * inode, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ DATA *data = (DATA *) file->private_data;
+ void __user *argp = (void __user *)arg;
+ struct opiocdesc op;
+ int error, node, len;
+ char *str, *tmp;
+ char buffer[64];
+ static int cnt;
+
+ switch (cmd) {
+ case OPIOCGET:
+ if (copy_from_user(&op, argp, sizeof(op)))
+ return -EFAULT;
+
+ if (!goodnode(op.op_nodeid,data))
+ return -EINVAL;
+
+ error = copyin_string(op.op_name, op.op_namelen, &str);
+ if (error)
+ return error;
+
+ len = prom_getproplen(op.op_nodeid,str);
+
+ if (len > op.op_buflen) {
+ kfree(str);
+ return -ENOMEM;
+ }
+
+ op.op_buflen = len;
+
+ if (len <= 0) {
+ kfree(str);
+ /* Verified by the above copy_from_user */
+ if (__copy_to_user(argp, &op,
+ sizeof(op)))
+ return -EFAULT;
+ return 0;
+ }
+
+ tmp = kmalloc(len + 1, GFP_KERNEL);
+ if (!tmp) {
+ kfree(str);
+ return -ENOMEM;
+ }
+
+ prom_getproperty(op.op_nodeid, str, tmp, len);
+
+ tmp[len] = '\0';
+
+ if (__copy_to_user(argp, &op, sizeof(op)) != 0
+ || copy_to_user(op.op_buf, tmp, len) != 0)
+ error = -EFAULT;
+
+ kfree(tmp);
+ kfree(str);
+
+ return error;
+
+ case OPIOCNEXTPROP:
+ if (copy_from_user(&op, argp, sizeof(op)))
+ return -EFAULT;
+
+ if (!goodnode(op.op_nodeid,data))
+ return -EINVAL;
+
+ error = copyin_string(op.op_name, op.op_namelen, &str);
+ if (error)
+ return error;
+
+ tmp = prom_nextprop(op.op_nodeid,str,buffer);
+
+ if (tmp) {
+ len = strlen(tmp);
+ if (len > op.op_buflen)
+ len = op.op_buflen;
+ else
+ op.op_buflen = len;
+ } else {
+ len = op.op_buflen = 0;
+ }
+
+ if (!access_ok(VERIFY_WRITE, argp, sizeof(op))) {
+ kfree(str);
+ return -EFAULT;
+ }
+
+ if (!access_ok(VERIFY_WRITE, op.op_buf, len)) {
+ kfree(str);
+ return -EFAULT;
+ }
+
+ error = __copy_to_user(argp, &op, sizeof(op));
+ if (!error) error = __copy_to_user(op.op_buf, tmp, len);
+
+ kfree(str);
+
+ return error;
+
+ case OPIOCSET:
+ if (copy_from_user(&op, argp, sizeof(op)))
+ return -EFAULT;
+
+ if (!goodnode(op.op_nodeid,data))
+ return -EINVAL;
+
+ error = copyin_string(op.op_name, op.op_namelen, &str);
+ if (error)
+ return error;
+
+ error = copyin_string(op.op_buf, op.op_buflen, &tmp);
+ if (error) {
+ kfree(str);
+ return error;
+ }
+
+ len = prom_setprop(op.op_nodeid,str,tmp,op.op_buflen+1);
+
+ if (len != op.op_buflen)
+ return -EINVAL;
+
+ kfree(str);
+ kfree(tmp);
+
+ return 0;
+
+ case OPIOCGETOPTNODE:
+ if (copy_to_user(argp, &options_node, sizeof(int)))
+ return -EFAULT;
+ return 0;
+
+ case OPIOCGETNEXT:
+ case OPIOCGETCHILD:
+ if (copy_from_user(&node, argp, sizeof(int)))
+ return -EFAULT;
+
+ if (cmd == OPIOCGETNEXT)
+ node = __prom_getsibling(node);
+ else
+ node = __prom_getchild(node);
+
+ if (__copy_to_user(argp, &node, sizeof(int)))
+ return -EFAULT;
+
+ return 0;
+
+ default:
+ if (cnt++ < 10)
+ printk(KERN_INFO "openprom_bsd_ioctl: cmd 0x%X\n", cmd);
+ return -EINVAL;
+
+ }
+}
+
+
+/*
+ * Handoff control to the correct ioctl handler.
+ */
+static int openprom_ioctl(struct inode * inode, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ DATA *data = (DATA *) file->private_data;
+ static int cnt;
+
+ switch (cmd) {
+ case OPROMGETOPT:
+ case OPROMNXTOPT:
+ if ((file->f_mode & FMODE_READ) == 0)
+ return -EPERM;
+ return openprom_sunos_ioctl(inode, file, cmd, arg,
+ options_node);
+
+ case OPROMSETOPT:
+ case OPROMSETOPT2:
+ if ((file->f_mode & FMODE_WRITE) == 0)
+ return -EPERM;
+ return openprom_sunos_ioctl(inode, file, cmd, arg,
+ options_node);
+
+ case OPROMNEXT:
+ case OPROMCHILD:
+ case OPROMGETPROP:
+ case OPROMNXTPROP:
+ if ((file->f_mode & FMODE_READ) == 0)
+ return -EPERM;
+ return openprom_sunos_ioctl(inode, file, cmd, arg,
+ data->current_node);
+
+ case OPROMU2P:
+ case OPROMGETCONS:
+ case OPROMGETFBNAME:
+ case OPROMGETBOOTARGS:
+ case OPROMSETCUR:
+ case OPROMPCI2NODE:
+ case OPROMPATH2NODE:
+ if ((file->f_mode & FMODE_READ) == 0)
+ return -EPERM;
+ return openprom_sunos_ioctl(inode, file, cmd, arg, 0);
+
+ case OPIOCGET:
+ case OPIOCNEXTPROP:
+ case OPIOCGETOPTNODE:
+ case OPIOCGETNEXT:
+ case OPIOCGETCHILD:
+ if ((file->f_mode & FMODE_READ) == 0)
+ return -EBADF;
+ return openprom_bsd_ioctl(inode,file,cmd,arg);
+
+ case OPIOCSET:
+ if ((file->f_mode & FMODE_WRITE) == 0)
+ return -EBADF;
+ return openprom_bsd_ioctl(inode,file,cmd,arg);
+
+ default:
+ if (cnt++ < 10)
+ printk("openprom_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg);
+ return -EINVAL;
+ }
+}
+
+static int openprom_open(struct inode * inode, struct file * file)
+{
+ DATA *data;
+
+ data = (DATA *) kmalloc(sizeof(DATA), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->current_node = prom_root_node;
+ data->lastnode = prom_root_node;
+ file->private_data = (void *)data;
+
+ return 0;
+}
+
+static int openprom_release(struct inode * inode, struct file * file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
+static struct file_operations openprom_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = openprom_ioctl,
+ .open = openprom_open,
+ .release = openprom_release,
+};
+
+static struct miscdevice openprom_dev = {
+ SUN_OPENPROM_MINOR, "openprom", &openprom_fops
+};
+
+static int __init openprom_init(void)
+{
+ int error;
+
+ error = misc_register(&openprom_dev);
+ if (error) {
+ printk(KERN_ERR "openprom: unable to get misc minor\n");
+ return error;
+ }
+
+ options_node = prom_getchild(prom_root_node);
+ options_node = prom_searchsiblings(options_node,"options");
+
+ if (options_node == 0 || options_node == -1) {
+ printk(KERN_ERR "openprom: unable to find options node\n");
+ misc_deregister(&openprom_dev);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static void __exit openprom_cleanup(void)
+{
+ misc_deregister(&openprom_dev);
+}
+
+module_init(openprom_init);
+module_exit(openprom_cleanup);
+MODULE_LICENSE("GPL");