mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1da177e4c3
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!
175 lines
4.3 KiB
C
175 lines
4.3 KiB
C
/* drivers/nubus/proc.c: Proc FS interface for NuBus.
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By David Huggins-Daines <dhd@debian.org>
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Much code and many ideas from drivers/pci/proc.c:
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Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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This is initially based on the Zorro and PCI interfaces. However,
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it works somewhat differently. The intent is to provide a
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structure in /proc analogous to the structure of the NuBus ROM
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resources.
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Therefore each NuBus device is in fact a directory, which may in
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turn contain subdirectories. The "files" correspond to NuBus
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resource records. For those types of records which we know how to
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convert to formats that are meaningful to userspace (mostly just
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icons) these files will provide "cooked" data. Otherwise they will
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simply provide raw access (read-only of course) to the ROM. */
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/nubus.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <asm/uaccess.h>
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#include <asm/byteorder.h>
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static int
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get_nubus_dev_info(char *buf, char **start, off_t pos, int count)
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{
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struct nubus_dev *dev = nubus_devices;
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off_t at = 0;
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int len, cnt;
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cnt = 0;
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while (dev && count > cnt) {
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len = sprintf(buf, "%x\t%04x %04x %04x %04x",
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dev->board->slot,
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dev->category,
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dev->type,
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dev->dr_sw,
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dev->dr_hw);
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len += sprintf(buf+len,
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"\t%08lx",
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dev->board->slot_addr);
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buf[len++] = '\n';
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at += len;
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if (at >= pos) {
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if (!*start) {
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*start = buf + (pos - (at - len));
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cnt = at - pos;
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} else
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cnt += len;
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buf += len;
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}
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dev = dev->next;
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}
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return (count > cnt) ? cnt : count;
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}
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static struct proc_dir_entry *proc_bus_nubus_dir;
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static void nubus_proc_subdir(struct nubus_dev* dev,
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struct proc_dir_entry* parent,
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struct nubus_dir* dir)
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{
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struct nubus_dirent ent;
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/* Some of these are directories, others aren't */
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while (nubus_readdir(dir, &ent) != -1) {
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char name[8];
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struct proc_dir_entry* e;
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sprintf(name, "%x", ent.type);
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e = create_proc_entry(name, S_IFREG | S_IRUGO |
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S_IWUSR, parent);
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if (!e) return;
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}
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}
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/* Can't do this recursively since the root directory is structured
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somewhat differently from the subdirectories */
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static void nubus_proc_populate(struct nubus_dev* dev,
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struct proc_dir_entry* parent,
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struct nubus_dir* root)
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{
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struct nubus_dirent ent;
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/* We know these are all directories (board resource + one or
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more functional resources) */
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while (nubus_readdir(root, &ent) != -1) {
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char name[8];
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struct proc_dir_entry* e;
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struct nubus_dir dir;
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sprintf(name, "%x", ent.type);
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e = proc_mkdir(name, parent);
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if (!e) return;
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/* And descend */
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if (nubus_get_subdir(&ent, &dir) == -1) {
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/* This shouldn't happen */
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printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n",
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dev->board->slot, ent.type);
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continue;
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} else {
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nubus_proc_subdir(dev, e, &dir);
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}
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}
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}
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int nubus_proc_attach_device(struct nubus_dev *dev)
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{
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struct proc_dir_entry *e;
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struct nubus_dir root;
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char name[8];
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if (dev == NULL) {
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printk(KERN_ERR
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"NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
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return -1;
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}
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if (dev->board == NULL) {
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printk(KERN_ERR
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"NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
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printk("dev = %p, dev->board = %p\n", dev, dev->board);
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return -1;
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}
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/* Create a directory */
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sprintf(name, "%x", dev->board->slot);
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e = dev->procdir = proc_mkdir(name, proc_bus_nubus_dir);
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if (!e)
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return -ENOMEM;
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/* Now recursively populate it with files */
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nubus_get_root_dir(dev->board, &root);
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nubus_proc_populate(dev, e, &root);
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return 0;
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}
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/* FIXME: this is certainly broken! */
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int nubus_proc_detach_device(struct nubus_dev *dev)
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{
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struct proc_dir_entry *e;
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if ((e = dev->procdir)) {
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if (atomic_read(&e->count))
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return -EBUSY;
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remove_proc_entry(e->name, proc_bus_nubus_dir);
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dev->procdir = NULL;
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}
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return 0;
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}
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void __init proc_bus_nubus_add_devices(void)
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{
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struct nubus_dev *dev;
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for(dev = nubus_devices; dev; dev = dev->next)
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nubus_proc_attach_device(dev);
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}
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void __init nubus_proc_init(void)
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{
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if (!MACH_IS_MAC)
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return;
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proc_bus_nubus_dir = proc_mkdir("nubus", proc_bus);
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create_proc_info_entry("devices", 0, proc_bus_nubus_dir,
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get_nubus_dev_info);
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proc_bus_nubus_add_devices();
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}
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