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path: root/drivers/nubus/proc.c
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Diffstat (limited to 'drivers/nubus/proc.c')
-rw-r--r--drivers/nubus/proc.c281
1 files changed, 134 insertions, 147 deletions
diff --git a/drivers/nubus/proc.c b/drivers/nubus/proc.c
index 004a122ac0ff..c2e5a7e6bd3e 100644
--- a/drivers/nubus/proc.c
+++ b/drivers/nubus/proc.c
@@ -11,39 +11,37 @@
structure in /proc analogous to the structure of the NuBus ROM
resources.
- Therefore each NuBus device is in fact a directory, which may in
- turn contain subdirectories. The "files" correspond to NuBus
- resource records. For those types of records which we know how to
- convert to formats that are meaningful to userspace (mostly just
- icons) these files will provide "cooked" data. Otherwise they will
- simply provide raw access (read-only of course) to the ROM. */
+ Therefore each board function gets a directory, which may in turn
+ contain subdirectories. Each slot resource is a file. Unrecognized
+ resources are empty files, since every resource ID requires a special
+ case (e.g. if the resource ID implies a directory or block, then its
+ value has to be interpreted as a slot ROM pointer etc.).
+ */
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/nubus.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
-
#include <linux/uaccess.h>
#include <asm/byteorder.h>
+/*
+ * /proc/bus/nubus/devices stuff
+ */
+
static int
nubus_devices_proc_show(struct seq_file *m, void *v)
{
- struct nubus_dev *dev = nubus_devices;
-
- while (dev) {
- seq_printf(m, "%x\t%04x %04x %04x %04x",
- dev->board->slot,
- dev->category,
- dev->type,
- dev->dr_sw,
- dev->dr_hw);
- seq_printf(m, "\t%08lx\n", dev->board->slot_addr);
- dev = dev->next;
- }
+ struct nubus_rsrc *fres;
+
+ for_each_func_rsrc(fres)
+ seq_printf(m, "%x\t%04x %04x %04x %04x\t%08lx\n",
+ fres->board->slot, fres->category, fres->type,
+ fres->dr_sw, fres->dr_hw, fres->board->slot_addr);
return 0;
}
@@ -61,174 +59,163 @@ static const struct file_operations nubus_devices_proc_fops = {
static struct proc_dir_entry *proc_bus_nubus_dir;
-static const struct file_operations nubus_proc_subdir_fops = {
-#warning Need to set some I/O handlers here
-};
+/*
+ * /proc/bus/nubus/x/ stuff
+ */
-static void nubus_proc_subdir(struct nubus_dev* dev,
- struct proc_dir_entry* parent,
- struct nubus_dir* dir)
+struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
{
- struct nubus_dirent ent;
-
- /* Some of these are directories, others aren't */
- while (nubus_readdir(dir, &ent) != -1) {
- char name[8];
- struct proc_dir_entry* e;
-
- sprintf(name, "%x", ent.type);
- e = proc_create(name, S_IFREG | S_IRUGO | S_IWUSR, parent,
- &nubus_proc_subdir_fops);
- if (!e)
- return;
- }
+ char name[2];
+
+ if (!proc_bus_nubus_dir)
+ return NULL;
+ snprintf(name, sizeof(name), "%x", board->slot);
+ return proc_mkdir(name, proc_bus_nubus_dir);
}
-/* Can't do this recursively since the root directory is structured
- somewhat differently from the subdirectories */
-static void nubus_proc_populate(struct nubus_dev* dev,
- struct proc_dir_entry* parent,
- struct nubus_dir* root)
+/* The PDE private data for any directory under /proc/bus/nubus/x/
+ * is the bytelanes value for the board in slot x.
+ */
+
+struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ struct nubus_board *board)
{
- struct nubus_dirent ent;
-
- /* We know these are all directories (board resource + one or
- more functional resources) */
- while (nubus_readdir(root, &ent) != -1) {
- char name[8];
- struct proc_dir_entry* e;
- struct nubus_dir dir;
-
- sprintf(name, "%x", ent.type);
- e = proc_mkdir(name, parent);
- if (!e) return;
-
- /* And descend */
- if (nubus_get_subdir(&ent, &dir) == -1) {
- /* This shouldn't happen */
- printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n",
- dev->board->slot, ent.type);
- continue;
- } else {
- nubus_proc_subdir(dev, e, &dir);
- }
- }
+ char name[9];
+ int lanes = board->lanes;
+
+ if (!procdir)
+ return NULL;
+ snprintf(name, sizeof(name), "%x", ent->type);
+ return proc_mkdir_data(name, 0555, procdir, (void *)lanes);
}
-int nubus_proc_attach_device(struct nubus_dev *dev)
+/* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to
+ * an instance of the following structure, which gives the location and size
+ * of the resource data in the slot ROM. For slot resources which hold only a
+ * small integer, this integer value is stored directly and size is set to 0.
+ * A NULL private data pointer indicates an unrecognized resource.
+ */
+
+struct nubus_proc_pde_data {
+ unsigned char *res_ptr;
+ unsigned int res_size;
+};
+
+static struct nubus_proc_pde_data *
+nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size)
{
- struct proc_dir_entry *e;
- struct nubus_dir root;
- char name[8];
-
- if (dev == NULL) {
- printk(KERN_ERR
- "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
- return -1;
- }
-
- if (dev->board == NULL) {
- printk(KERN_ERR
- "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
- printk("dev = %p, dev->board = %p\n", dev, dev->board);
- return -1;
- }
-
- /* Create a directory */
- sprintf(name, "%x", dev->board->slot);
- e = dev->procdir = proc_mkdir(name, proc_bus_nubus_dir);
- if (!e)
- return -ENOMEM;
+ struct nubus_proc_pde_data *pde_data;
- /* Now recursively populate it with files */
- nubus_get_root_dir(dev->board, &root);
- nubus_proc_populate(dev, e, &root);
+ pde_data = kmalloc(sizeof(*pde_data), GFP_KERNEL);
+ if (!pde_data)
+ return NULL;
- return 0;
+ pde_data->res_ptr = ptr;
+ pde_data->res_size = size;
+ return pde_data;
}
-EXPORT_SYMBOL(nubus_proc_attach_device);
-/*
- * /proc/nubus stuff
- */
-static int nubus_proc_show(struct seq_file *m, void *v)
+static int nubus_proc_rsrc_show(struct seq_file *m, void *v)
{
- const struct nubus_board *board = v;
+ struct inode *inode = m->private;
+ struct nubus_proc_pde_data *pde_data;
- /* Display header on line 1 */
- if (v == SEQ_START_TOKEN)
- seq_puts(m, "Nubus devices found:\n");
- else
- seq_printf(m, "Slot %X: %s\n", board->slot, board->name);
+ pde_data = PDE_DATA(inode);
+ if (!pde_data)
+ return 0;
+
+ if (pde_data->res_size > m->size)
+ return -EFBIG;
+
+ if (pde_data->res_size) {
+ int lanes = (int)proc_get_parent_data(inode);
+ struct nubus_dirent ent;
+
+ if (!lanes)
+ return 0;
+
+ ent.mask = lanes;
+ ent.base = pde_data->res_ptr;
+ ent.data = 0;
+ nubus_seq_write_rsrc_mem(m, &ent, pde_data->res_size);
+ } else {
+ unsigned int data = (unsigned int)pde_data->res_ptr;
+
+ seq_putc(m, data >> 16);
+ seq_putc(m, data >> 8);
+ seq_putc(m, data >> 0);
+ }
return 0;
}
-static void *nubus_proc_start(struct seq_file *m, loff_t *_pos)
+static int nubus_proc_rsrc_open(struct inode *inode, struct file *file)
{
- struct nubus_board *board;
- unsigned pos;
-
- if (*_pos > LONG_MAX)
- return NULL;
- pos = *_pos;
- if (pos == 0)
- return SEQ_START_TOKEN;
- for (board = nubus_boards; board; board = board->next)
- if (--pos == 0)
- break;
- return board;
+ return single_open(file, nubus_proc_rsrc_show, inode);
}
-static void *nubus_proc_next(struct seq_file *p, void *v, loff_t *_pos)
+static const struct file_operations nubus_proc_rsrc_fops = {
+ .open = nubus_proc_rsrc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ unsigned int size)
{
- /* Walk the list of NuBus boards */
- struct nubus_board *board = v;
-
- ++*_pos;
- if (v == SEQ_START_TOKEN)
- board = nubus_boards;
- else if (board)
- board = board->next;
- return board;
+ char name[9];
+ struct nubus_proc_pde_data *pde_data;
+
+ if (!procdir)
+ return;
+
+ snprintf(name, sizeof(name), "%x", ent->type);
+ if (size)
+ pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size);
+ else
+ pde_data = NULL;
+ proc_create_data(name, S_IFREG | 0444, procdir,
+ &nubus_proc_rsrc_fops, pde_data);
}
-static void nubus_proc_stop(struct seq_file *p, void *v)
+void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent)
{
+ char name[9];
+ unsigned char *data = (unsigned char *)ent->data;
+
+ if (!procdir)
+ return;
+
+ snprintf(name, sizeof(name), "%x", ent->type);
+ proc_create_data(name, S_IFREG | 0444, procdir,
+ &nubus_proc_rsrc_fops,
+ nubus_proc_alloc_pde_data(data, 0));
}
-static const struct seq_operations nubus_proc_seqops = {
- .start = nubus_proc_start,
- .next = nubus_proc_next,
- .stop = nubus_proc_stop,
- .show = nubus_proc_show,
-};
+/*
+ * /proc/nubus stuff
+ */
static int nubus_proc_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &nubus_proc_seqops);
+ return single_open(file, nubus_proc_show, NULL);
}
static const struct file_operations nubus_proc_fops = {
.open = nubus_proc_open,
.read = seq_read,
.llseek = seq_lseek,
- .release = seq_release,
+ .release = single_release,
};
-void __init proc_bus_nubus_add_devices(void)
-{
- struct nubus_dev *dev;
-
- for(dev = nubus_devices; dev; dev = dev->next)
- nubus_proc_attach_device(dev);
-}
-
void __init nubus_proc_init(void)
{
proc_create("nubus", 0, NULL, &nubus_proc_fops);
- if (!MACH_IS_MAC)
- return;
proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL);
+ if (!proc_bus_nubus_dir)
+ return;
proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops);
- proc_bus_nubus_add_devices();
}