--- /dev/null
+/*
+ * /proc/bus/pnp interface for Plug and Play devices
+ *
+ * Written by David Hinds, dahinds@users.sourceforge.net
+ * Modified by Thomas Hood
+ *
+ * The .../devices and .../<node> and .../boot/<node> files are
+ * utilized by the lspnp and setpnp utilities, supplied with the
+ * pcmcia-cs package.
+ * http://pcmcia-cs.sourceforge.net
+ *
+ * The .../escd file is utilized by the lsescd utility written by
+ * Gunther Mayer.
+ *
+ * The .../legacy_device_resources file is not used yet.
+ *
+ * The other files are human-readable.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/pnp.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+
+#include <asm/uaccess.h>
+
+#include "pnpbios.h"
+
+static struct proc_dir_entry *proc_pnp = NULL;
+static struct proc_dir_entry *proc_pnp_boot = NULL;
+
+static int pnpconfig_proc_show(struct seq_file *m, void *v)
+{
+ struct pnp_isa_config_struc pnps;
+
+ if (pnp_bios_isapnp_config(&pnps))
+ return -EIO;
+ seq_printf(m, "structure_revision %d\n"
+ "number_of_CSNs %d\n"
+ "ISA_read_data_port 0x%x\n",
+ pnps.revision, pnps.no_csns, pnps.isa_rd_data_port);
+ return 0;
+}
+
+static int pnpconfig_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pnpconfig_proc_show, NULL);
+}
+
+static const struct file_operations pnpconfig_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = pnpconfig_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int escd_info_proc_show(struct seq_file *m, void *v)
+{
+ struct escd_info_struc escd;
+
+ if (pnp_bios_escd_info(&escd))
+ return -EIO;
+ seq_printf(m, "min_ESCD_write_size %d\n"
+ "ESCD_size %d\n"
+ "NVRAM_base 0x%x\n",
+ escd.min_escd_write_size,
+ escd.escd_size, escd.nv_storage_base);
+ return 0;
+}
+
+static int escd_info_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, escd_info_proc_show, NULL);
+}
+
+static const struct file_operations escd_info_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = escd_info_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#define MAX_SANE_ESCD_SIZE (32*1024)
+static int escd_proc_show(struct seq_file *m, void *v)
+{
+ struct escd_info_struc escd;
+ char *tmpbuf;
+ int escd_size;
+
+ if (pnp_bios_escd_info(&escd))
+ return -EIO;
+
+ /* sanity check */
+ if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
+ printk(KERN_ERR
+ "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__);
+ return -EFBIG;
+ }
+
+ tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL);
+ if (!tmpbuf)
+ return -ENOMEM;
+
+ if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) {
+ kfree(tmpbuf);
+ return -EIO;
+ }
+
+ escd_size =
+ (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256;
+
+ /* sanity check */
+ if (escd_size > MAX_SANE_ESCD_SIZE) {
+ printk(KERN_ERR "PnPBIOS: %s: ESCD size reported by"
+ " BIOS read_escd call is too great\n", __func__);
+ kfree(tmpbuf);
+ return -EFBIG;
+ }
+
+ seq_write(m, tmpbuf, escd_size);
+ kfree(tmpbuf);
+ return 0;
+}
+
+static int escd_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, escd_proc_show, NULL);
+}
+
+static const struct file_operations escd_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = escd_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int pnp_legacyres_proc_show(struct seq_file *m, void *v)
+{
+ void *buf;
+
+ buf = kmalloc(65536, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ if (pnp_bios_get_stat_res(buf)) {
+ kfree(buf);
+ return -EIO;
+ }
+
+ seq_write(m, buf, 65536);
+ kfree(buf);
+ return 0;
+}
+
+static int pnp_legacyres_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pnp_legacyres_proc_show, NULL);
+}
+
+static const struct file_operations pnp_legacyres_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = pnp_legacyres_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int pnp_devices_proc_show(struct seq_file *m, void *v)
+{
+ struct pnp_bios_node *node;
+ u8 nodenum;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+
+ for (nodenum = 0; nodenum < 0xff;) {
+ u8 thisnodenum = nodenum;
+
+ if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node))
+ break;
+ seq_printf(m, "%02x\t%08x\t%3phC\t%04x\n",
+ node->handle, node->eisa_id,
+ node->type_code, node->flags);
+ if (nodenum <= thisnodenum) {
+ printk(KERN_ERR
+ "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
+ "PnPBIOS: proc_read_devices:",
+ (unsigned int)nodenum,
+ (unsigned int)thisnodenum);
+ break;
+ }
+ }
+ kfree(node);
+ return 0;
+}
+
+static int pnp_devices_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pnp_devices_proc_show, NULL);
+}
+
+static const struct file_operations pnp_devices_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = pnp_devices_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int pnpbios_proc_show(struct seq_file *m, void *v)
+{
+ void *data = m->private;
+ struct pnp_bios_node *node;
+ int boot = (long)data >> 8;
+ u8 nodenum = (long)data;
+ int len;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+ if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
+ kfree(node);
+ return -EIO;
+ }
+ len = node->size - sizeof(struct pnp_bios_node);
+ seq_write(m, node->data, len);
+ kfree(node);
+ return 0;
+}
+
+static int pnpbios_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pnpbios_proc_show, PDE_DATA(inode));
+}
+
+static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ void *data = PDE_DATA(file_inode(file));
+ struct pnp_bios_node *node;
+ int boot = (long)data >> 8;
+ u8 nodenum = (long)data;
+ int ret = count;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+ if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
+ ret = -EIO;
+ goto out;
+ }
+ if (count != node->size - sizeof(struct pnp_bios_node)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ if (copy_from_user(node->data, buf, count)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ ret = count;
+out:
+ kfree(node);
+ return ret;
+}
+
+static const struct file_operations pnpbios_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = pnpbios_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = pnpbios_proc_write,
+};
+
+int pnpbios_interface_attach_device(struct pnp_bios_node *node)
+{
+ char name[3];
+
+ sprintf(name, "%02x", node->handle);
+
+ if (!proc_pnp)
+ return -EIO;
+ if (!pnpbios_dont_use_current_config) {
+ proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_fops,
+ (void *)(long)(node->handle));
+ }
+
+ if (!proc_pnp_boot)
+ return -EIO;
+ if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_fops,
+ (void *)(long)(node->handle + 0x100)))
+ return 0;
+ return -EIO;
+}
+
+/*
+ * When this is called, pnpbios functions are assumed to
+ * work and the pnpbios_dont_use_current_config flag
+ * should already have been set to the appropriate value
+ */
+int __init pnpbios_proc_init(void)
+{
+ proc_pnp = proc_mkdir("bus/pnp", NULL);
+ if (!proc_pnp)
+ return -EIO;
+ proc_pnp_boot = proc_mkdir("boot", proc_pnp);
+ if (!proc_pnp_boot)
+ return -EIO;
+ proc_create("devices", 0, proc_pnp, &pnp_devices_proc_fops);
+ proc_create("configuration_info", 0, proc_pnp, &pnpconfig_proc_fops);
+ proc_create("escd_info", 0, proc_pnp, &escd_info_proc_fops);
+ proc_create("escd", S_IRUSR, proc_pnp, &escd_proc_fops);
+ proc_create("legacy_device_resources", 0, proc_pnp, &pnp_legacyres_proc_fops);
+
+ return 0;
+}
+
+void __exit pnpbios_proc_exit(void)
+{
+ int i;
+ char name[3];
+
+ if (!proc_pnp)
+ return;
+
+ for (i = 0; i < 0xff; i++) {
+ sprintf(name, "%02x", i);
+ if (!pnpbios_dont_use_current_config)
+ remove_proc_entry(name, proc_pnp);
+ remove_proc_entry(name, proc_pnp_boot);
+ }
+ remove_proc_entry("legacy_device_resources", proc_pnp);
+ remove_proc_entry("escd", proc_pnp);
+ remove_proc_entry("escd_info", proc_pnp);
+ remove_proc_entry("configuration_info", proc_pnp);
+ remove_proc_entry("devices", proc_pnp);
+ remove_proc_entry("boot", proc_pnp);
+ remove_proc_entry("bus/pnp", NULL);
+}
Code Review / kvmfornfv.git / blobdiff