* 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/slab.h>
#include <linux/string.h>
#include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <asm/oplib.h>
-#include <asm/prom.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/openpromio.h>
#include <asm/pbm.h>
#endif
-MODULE_AUTHOR("Thomas K. Dyas (tdyas@noc.rutgers.edu) and Eddie C. Dost (ecd@skynet.be)");
-MODULE_DESCRIPTION("OPENPROM Configuration Driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("1.0");
-
/* Private data kept by the driver for each descriptor. */
typedef struct openprom_private_data
{
- struct device_node *current_node; /* Current node for SunOS ioctls. */
- struct device_node *lastnode; /* Last valid node used by BSD ioctls. */
+ 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 struct device_node *options_node;
+static int options_node = 0;
/*
* Copy an openpromio structure into kernel space from user space.
if (bufsize > OPROMMAXPARAM)
bufsize = OPROMMAXPARAM;
- if (!(*opp_p = kzalloc(sizeof(int) + bufsize + 1, GFP_KERNEL)))
+ 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)) {
if (!info || !opp_p)
return -EFAULT;
- if (!(*opp_p = kzalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL)))
+ 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;
return 0;
}
-static int opromgetprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize)
-{
- void *pval;
- int len;
-
- if (!dp ||
- !(pval = of_get_property(dp, op->oprom_array, &len)) ||
- len <= 0 || len > bufsize)
- return copyout(argp, op, sizeof(int));
-
- memcpy(op->oprom_array, pval, len);
- op->oprom_array[len] = '\0';
- op->oprom_size = len;
-
- return copyout(argp, op, sizeof(int) + bufsize);
-}
-
-static int opromnxtprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize)
-{
- struct property *prop;
- int len;
-
- if (!dp)
- return copyout(argp, op, sizeof(int));
- if (op->oprom_array[0] == '\0') {
- prop = dp->properties;
- if (!prop)
- return copyout(argp, op, sizeof(int));
- len = strlen(prop->name);
- } else {
- prop = of_find_property(dp, op->oprom_array, NULL);
-
- if (!prop ||
- !prop->next ||
- (len = strlen(prop->next->name)) + 1 > bufsize)
- return copyout(argp, op, sizeof(int));
-
- prop = prop->next;
- }
-
- memcpy(op->oprom_array, prop->name, len);
- op->oprom_array[len] = '\0';
- op->oprom_size = ++len;
-
- return copyout(argp, op, sizeof(int) + bufsize);
-}
-
-static int opromsetopt(struct device_node *dp, struct openpromio *op, int bufsize)
-{
- char *buf = op->oprom_array + strlen(op->oprom_array) + 1;
- int len = op->oprom_array + bufsize - buf;
-
- return of_set_property(options_node, op->oprom_array, buf, len);
-}
-
-static int opromnext(void __user *argp, unsigned int cmd, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
-{
- phandle ph;
-
- BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
-
- if (bufsize < sizeof(phandle))
- return -EINVAL;
-
- ph = *((int *) op->oprom_array);
- if (ph) {
- dp = of_find_node_by_phandle(ph);
- if (!dp)
- return -EINVAL;
-
- switch (cmd) {
- case OPROMNEXT:
- dp = dp->sibling;
- break;
-
- case OPROMCHILD:
- dp = dp->child;
- break;
-
- case OPROMSETCUR:
- default:
- break;
- };
- } else {
- /* Sibling of node zero is the root node. */
- if (cmd != OPROMNEXT)
- return -EINVAL;
-
- dp = of_find_node_by_path("/");
- }
-
- ph = 0;
- if (dp)
- ph = dp->node;
-
- data->current_node = dp;
- *((int *) op->oprom_array) = ph;
- op->oprom_size = sizeof(phandle);
-
- return copyout(argp, op, bufsize + sizeof(int));
-}
-
-static int oprompci2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
-{
- int err = -EINVAL;
-
- if (bufsize >= 2*sizeof(int)) {
-#ifdef CONFIG_PCI
- struct pci_dev *pdev;
- struct pcidev_cookie *pcp;
- pdev = pci_find_slot (((int *) op->oprom_array)[0],
- ((int *) op->oprom_array)[1]);
-
- pcp = pdev->sysdata;
- if (pcp != NULL) {
- dp = pcp->prom_node;
- data->current_node = dp;
- *((int *)op->oprom_array) = dp->node;
- op->oprom_size = sizeof(int);
- err = copyout(argp, op, bufsize + sizeof(int));
- }
-#endif
- }
-
- return err;
-}
-
-static int oprompath2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data)
-{
- phandle ph = 0;
-
- dp = of_find_node_by_path(op->oprom_array);
- if (dp)
- ph = dp->node;
- data->current_node = dp;
- *((int *)op->oprom_array) = ph;
- op->oprom_size = sizeof(int);
-
- return copyout(argp, op, bufsize + sizeof(int));
-}
-
-static int opromgetbootargs(void __user *argp, struct openpromio *op, int bufsize)
-{
- char *buf = saved_command_line;
- int len = strlen(buf);
-
- if (len > bufsize)
- return -EINVAL;
-
- strcpy(op->oprom_array, buf);
- op->oprom_size = len;
-
- return copyout(argp, op, bufsize + sizeof(int));
-}
-
/*
* SunOS and Solaris /dev/openprom ioctl calls.
*/
static int openprom_sunos_ioctl(struct inode * inode, struct file * file,
- unsigned int cmd, unsigned long arg,
- struct device_node *dp)
+ unsigned int cmd, unsigned long arg, int node)
{
- DATA *data = file->private_data;
+ DATA *data = (DATA *) file->private_data;
+ char buffer[OPROMMAXPARAM+1], *buf;
struct openpromio *opp;
- int bufsize, error = 0;
+ int bufsize, len, error = 0;
static int cnt;
void __user *argp = (void __user *)arg;
switch (cmd) {
case OPROMGETOPT:
case OPROMGETPROP:
- error = opromgetprop(argp, dp, opp, bufsize);
+ 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:
- error = opromnxtprop(argp, dp, opp, bufsize);
+ 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:
- error = opromsetopt(dp, opp, bufsize);
+ 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:
- error = opromnext(argp, cmd, dp, opp, bufsize, data);
+ 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 = oprompci2node(argp, dp, opp, bufsize, data);
+ 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:
- error = oprompath2node(argp, dp, opp, bufsize, data);
+ 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:
- error = opromgetbootargs(argp, opp, bufsize);
+ 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:
return error;
}
-static struct device_node *get_node(phandle n, DATA *data)
-{
- struct device_node *dp = of_find_node_by_phandle(n);
- if (dp)
- data->lastnode = dp;
+/* 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 dp;
+/* 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. */
if (!tmp)
return -ENOMEM;
- if (copy_from_user(tmp, user, len)) {
+ if(copy_from_user(tmp, user, len)) {
kfree(tmp);
return -EFAULT;
}
/*
* NetBSD /dev/openprom ioctl calls.
*/
-static int opiocget(void __user *argp, DATA *data)
+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;
- struct device_node *dp;
- char *str;
- void *pval;
- int err, len;
+ int error, node, len;
+ char *str, *tmp;
+ char buffer[64];
+ static int cnt;
- if (copy_from_user(&op, argp, sizeof(op)))
- return -EFAULT;
+ switch (cmd) {
+ case OPIOCGET:
+ if (copy_from_user(&op, argp, sizeof(op)))
+ return -EFAULT;
- dp = get_node(op.op_nodeid, data);
+ if (!goodnode(op.op_nodeid,data))
+ return -EINVAL;
- err = copyin_string(op.op_name, op.op_namelen, &str);
- if (err)
- return err;
+ error = copyin_string(op.op_name, op.op_namelen, &str);
+ if (error)
+ return error;
- pval = of_get_property(dp, str, &len);
- err = 0;
- if (!pval || len > op.op_buflen) {
- err = -EINVAL;
- } else {
- op.op_buflen = len;
- if (copy_to_user(argp, &op, sizeof(op)) ||
- copy_to_user(op.op_buf, pval, len))
- err = -EFAULT;
- }
- kfree(str);
+ len = prom_getproplen(op.op_nodeid,str);
- return err;
-}
+ if (len > op.op_buflen) {
+ kfree(str);
+ return -ENOMEM;
+ }
-static int opiocnextprop(void __user *argp, DATA *data)
-{
- struct opiocdesc op;
- struct device_node *dp;
- struct property *prop;
- char *str;
- int err, len;
+ op.op_buflen = len;
- if (copy_from_user(&op, argp, sizeof(op)))
- return -EFAULT;
+ if (len <= 0) {
+ kfree(str);
+ /* Verified by the above copy_from_user */
+ if (__copy_to_user(argp, &op,
+ sizeof(op)))
+ return -EFAULT;
+ return 0;
+ }
- dp = get_node(op.op_nodeid, data);
- if (!dp)
- return -EINVAL;
+ tmp = kmalloc(len + 1, GFP_KERNEL);
+ if (!tmp) {
+ kfree(str);
+ return -ENOMEM;
+ }
- err = copyin_string(op.op_name, op.op_namelen, &str);
- if (err)
- return err;
+ prom_getproperty(op.op_nodeid, str, tmp, len);
- if (str[0] == '\0') {
- prop = dp->properties;
- } else {
- prop = of_find_property(dp, str, NULL);
- if (prop)
- prop = prop->next;
- }
- kfree(str);
+ tmp[len] = '\0';
- if (!prop)
- len = 0;
- else
- len = prop->length;
+ if (__copy_to_user(argp, &op, sizeof(op)) != 0
+ || copy_to_user(op.op_buf, tmp, len) != 0)
+ error = -EFAULT;
- if (len > op.op_buflen)
- len = op.op_buflen;
+ kfree(tmp);
+ kfree(str);
- if (copy_to_user(argp, &op, sizeof(op)))
- return -EFAULT;
+ return error;
- if (len &&
- copy_to_user(op.op_buf, prop->value, len))
- return -EFAULT;
+ case OPIOCNEXTPROP:
+ if (copy_from_user(&op, argp, sizeof(op)))
+ return -EFAULT;
- return 0;
-}
+ if (!goodnode(op.op_nodeid,data))
+ return -EINVAL;
-static int opiocset(void __user *argp, DATA *data)
-{
- struct opiocdesc op;
- struct device_node *dp;
- char *str, *tmp;
- int err;
+ error = copyin_string(op.op_name, op.op_namelen, &str);
+ if (error)
+ return error;
- if (copy_from_user(&op, argp, sizeof(op)))
- return -EFAULT;
+ tmp = prom_nextprop(op.op_nodeid,str,buffer);
- dp = get_node(op.op_nodeid, data);
- if (!dp)
- return -EINVAL;
+ 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;
+ }
- err = copyin_string(op.op_name, op.op_namelen, &str);
- if (err)
- return err;
+ if (!access_ok(VERIFY_WRITE, argp, sizeof(op))) {
+ kfree(str);
+ return -EFAULT;
+ }
- err = copyin_string(op.op_buf, op.op_buflen, &tmp);
- if (err) {
- kfree(str);
- return err;
- }
+ if (!access_ok(VERIFY_WRITE, op.op_buf, len)) {
+ kfree(str);
+ return -EFAULT;
+ }
- err = of_set_property(dp, str, tmp, op.op_buflen);
+ error = __copy_to_user(argp, &op, sizeof(op));
+ if (!error) error = __copy_to_user(op.op_buf, tmp, len);
- kfree(str);
- kfree(tmp);
+ kfree(str);
- return err;
-}
+ return error;
-static int opiocgetnext(unsigned int cmd, void __user *argp)
-{
- struct device_node *dp;
- phandle nd;
+ case OPIOCSET:
+ if (copy_from_user(&op, argp, sizeof(op)))
+ return -EFAULT;
- BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
+ if (!goodnode(op.op_nodeid,data))
+ return -EINVAL;
- if (copy_from_user(&nd, argp, sizeof(phandle)))
- return -EFAULT;
+ error = copyin_string(op.op_name, op.op_namelen, &str);
+ if (error)
+ return error;
- if (nd == 0) {
- if (cmd != OPIOCGETNEXT)
- return -EINVAL;
- dp = of_find_node_by_path("/");
- } else {
- dp = of_find_node_by_phandle(nd);
- nd = 0;
- if (dp) {
- if (cmd == OPIOCGETNEXT)
- dp = dp->sibling;
- else
- dp = dp->child;
+ error = copyin_string(op.op_buf, op.op_buflen, &tmp);
+ if (error) {
+ kfree(str);
+ return error;
}
- }
- if (dp)
- nd = dp->node;
- if (copy_to_user(argp, &nd, sizeof(phandle)))
- return -EFAULT;
- return 0;
-}
+ len = prom_setprop(op.op_nodeid,str,tmp,op.op_buflen+1);
-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;
- int err;
-
- switch (cmd) {
- case OPIOCGET:
- err = opiocget(argp, data);
- break;
+ if (len != op.op_buflen)
+ return -EINVAL;
- case OPIOCNEXTPROP:
- err = opiocnextprop(argp, data);
- break;
+ kfree(str);
+ kfree(tmp);
- case OPIOCSET:
- err = opiocset(argp, data);
- break;
+ return 0;
case OPIOCGETOPTNODE:
- BUILD_BUG_ON(sizeof(phandle) != sizeof(int));
-
- if (copy_to_user(argp, &options_node->node, sizeof(phandle)))
+ if (copy_to_user(argp, &options_node, sizeof(int)))
return -EFAULT;
-
return 0;
case OPIOCGETNEXT:
case OPIOCGETCHILD:
- err = opiocgetnext(cmd, argp);
- break;
+ 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;
- };
-
- return err;
+ }
}
unsigned int cmd, unsigned long arg)
{
DATA *data = (DATA *) file->private_data;
+ static int cnt;
switch (cmd) {
case OPROMGETOPT:
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 long openprom_compat_ioctl(struct file *file, unsigned int cmd,
case OPROMSETCUR:
case OPROMPCI2NODE:
case OPROMPATH2NODE:
+ lock_kernel();
rval = openprom_ioctl(file->f_dentry->d_inode, file, cmd, arg);
+ lock_kernel();
break;
}
{
DATA *data;
- data = kmalloc(sizeof(DATA), GFP_KERNEL);
+ data = (DATA *) kmalloc(sizeof(DATA), GFP_KERNEL);
if (!data)
return -ENOMEM;
- data->current_node = of_find_node_by_path("/");
- data->lastnode = data->current_node;
- file->private_data = (void *) data;
+ data->current_node = prom_root_node;
+ data->lastnode = prom_root_node;
+ file->private_data = (void *)data;
return 0;
}
};
static struct miscdevice openprom_dev = {
- .minor = SUN_OPENPROM_MINOR,
- .name = "openprom",
- .fops = &openprom_fops,
+ SUN_OPENPROM_MINOR, "openprom", &openprom_fops
};
static int __init openprom_init(void)
{
- struct device_node *dp;
- int err;
-
- err = misc_register(&openprom_dev);
- if (err)
- return err;
+ int error;
- dp = of_find_node_by_path("/");
- dp = dp->child;
- while (dp) {
- if (!strcmp(dp->name, "options"))
- break;
- dp = dp->sibling;
+ error = misc_register(&openprom_dev);
+ if (error) {
+ printk(KERN_ERR "openprom: unable to get misc minor\n");
+ return error;
}
- options_node = dp;
- if (!options_node) {
+ 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;
}
module_init(openprom_init);
module_exit(openprom_cleanup);
+MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff