275 lines
6.9 KiB
C
275 lines
6.9 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1999,2001-2004, 2006 Silicon Graphics, Inc. All Rights Reserved.
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*
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* Module to export the system's Firmware Interface Tables, including
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* PROM revision numbers and banners, in /proc
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/proc_fs.h>
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#include <linux/nodemask.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/sn/sn_sal.h>
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#include <asm/sn/sn_cpuid.h>
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#include <asm/sn/addrs.h>
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MODULE_DESCRIPTION("PROM version reporting for /proc");
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MODULE_AUTHOR("Chad Talbott");
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MODULE_LICENSE("GPL");
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/* Standard Intel FIT entry types */
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#define FIT_ENTRY_FIT_HEADER 0x00 /* FIT header entry */
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#define FIT_ENTRY_PAL_B 0x01 /* PAL_B entry */
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/* Entries 0x02 through 0x0D reserved by Intel */
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#define FIT_ENTRY_PAL_A_PROC 0x0E /* Processor-specific PAL_A entry */
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#define FIT_ENTRY_PAL_A 0x0F /* PAL_A entry, same as... */
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#define FIT_ENTRY_PAL_A_GEN 0x0F /* ...Generic PAL_A entry */
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#define FIT_ENTRY_UNUSED 0x7F /* Unused (reserved by Intel?) */
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/* OEM-defined entries range from 0x10 to 0x7E. */
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#define FIT_ENTRY_SAL_A 0x10 /* SAL_A entry */
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#define FIT_ENTRY_SAL_B 0x11 /* SAL_B entry */
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#define FIT_ENTRY_SALRUNTIME 0x12 /* SAL runtime entry */
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#define FIT_ENTRY_EFI 0x1F /* EFI entry */
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#define FIT_ENTRY_FPSWA 0x20 /* embedded fpswa entry */
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#define FIT_ENTRY_VMLINUX 0x21 /* embedded vmlinux entry */
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#define FIT_MAJOR_SHIFT (32 + 8)
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#define FIT_MAJOR_MASK ((1 << 8) - 1)
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#define FIT_MINOR_SHIFT 32
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#define FIT_MINOR_MASK ((1 << 8) - 1)
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#define FIT_MAJOR(q) \
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((unsigned) ((q) >> FIT_MAJOR_SHIFT) & FIT_MAJOR_MASK)
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#define FIT_MINOR(q) \
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((unsigned) ((q) >> FIT_MINOR_SHIFT) & FIT_MINOR_MASK)
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#define FIT_TYPE_SHIFT (32 + 16)
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#define FIT_TYPE_MASK ((1 << 7) - 1)
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#define FIT_TYPE(q) \
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((unsigned) ((q) >> FIT_TYPE_SHIFT) & FIT_TYPE_MASK)
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struct fit_type_map_t {
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unsigned char type;
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const char *name;
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};
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static const struct fit_type_map_t fit_entry_types[] = {
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{FIT_ENTRY_FIT_HEADER, "FIT Header"},
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{FIT_ENTRY_PAL_A_GEN, "Generic PAL_A"},
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{FIT_ENTRY_PAL_A_PROC, "Processor-specific PAL_A"},
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{FIT_ENTRY_PAL_A, "PAL_A"},
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{FIT_ENTRY_PAL_B, "PAL_B"},
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{FIT_ENTRY_SAL_A, "SAL_A"},
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{FIT_ENTRY_SAL_B, "SAL_B"},
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{FIT_ENTRY_SALRUNTIME, "SAL runtime"},
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{FIT_ENTRY_EFI, "EFI"},
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{FIT_ENTRY_VMLINUX, "Embedded Linux"},
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{FIT_ENTRY_FPSWA, "Embedded FPSWA"},
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{FIT_ENTRY_UNUSED, "Unused"},
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{0xff, "Error"},
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};
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static const char *fit_type_name(unsigned char type)
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{
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struct fit_type_map_t const *mapp;
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for (mapp = fit_entry_types; mapp->type != 0xff; mapp++)
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if (type == mapp->type)
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return mapp->name;
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if ((type > FIT_ENTRY_PAL_A) && (type < FIT_ENTRY_UNUSED))
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return "OEM type";
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if ((type > FIT_ENTRY_PAL_B) && (type < FIT_ENTRY_PAL_A))
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return "Reserved";
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return "Unknown type";
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}
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static int
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get_fit_entry(unsigned long nasid, int index, unsigned long *fentry,
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char *banner, int banlen)
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{
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return ia64_sn_get_fit_compt(nasid, index, fentry, banner, banlen);
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}
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/*
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* These two routines display the FIT table for each node.
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*/
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static int dump_fit_entry(char *page, unsigned long *fentry)
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{
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unsigned type;
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type = FIT_TYPE(fentry[1]);
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return sprintf(page, "%02x %-25s %x.%02x %016lx %u\n",
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type,
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fit_type_name(type),
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FIT_MAJOR(fentry[1]), FIT_MINOR(fentry[1]),
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fentry[0],
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/* mult by sixteen to get size in bytes */
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(unsigned)(fentry[1] & 0xffffff) * 16);
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}
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/*
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* We assume that the fit table will be small enough that we can print
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* the whole thing into one page. (This is true for our default 16kB
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* pages -- each entry is about 60 chars wide when printed.) I read
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* somewhere that the maximum size of the FIT is 128 entries, so we're
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* OK except for 4kB pages (and no one is going to do that on SN
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* anyway).
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*/
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static int
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dump_fit(char *page, unsigned long nasid)
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{
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unsigned long fentry[2];
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int index;
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char *p;
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p = page;
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for (index=0;;index++) {
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BUG_ON(index * 60 > PAGE_SIZE);
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if (get_fit_entry(nasid, index, fentry, NULL, 0))
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break;
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p += dump_fit_entry(p, fentry);
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}
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return p - page;
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}
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static int
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dump_version(char *page, unsigned long nasid)
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{
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unsigned long fentry[2];
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char banner[128];
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int index;
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int len;
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for (index = 0; ; index++) {
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if (get_fit_entry(nasid, index, fentry, banner,
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sizeof(banner)))
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return 0;
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if (FIT_TYPE(fentry[1]) == FIT_ENTRY_SAL_A)
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break;
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}
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len = sprintf(page, "%x.%02x\n", FIT_MAJOR(fentry[1]),
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FIT_MINOR(fentry[1]));
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page += len;
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if (banner[0])
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len += snprintf(page, PAGE_SIZE-len, "%s\n", banner);
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return len;
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}
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/* same as in proc_misc.c */
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static int
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proc_calc_metrics(char *page, char **start, off_t off, int count, int *eof,
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int len)
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{
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if (len <= off + count)
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*eof = 1;
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*start = page + off;
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len -= off;
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if (len > count)
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len = count;
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if (len < 0)
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len = 0;
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return len;
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}
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static int
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read_version_entry(char *page, char **start, off_t off, int count, int *eof,
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void *data)
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{
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int len;
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/* data holds the NASID of the node */
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len = dump_version(page, (unsigned long)data);
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len = proc_calc_metrics(page, start, off, count, eof, len);
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return len;
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}
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static int
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read_fit_entry(char *page, char **start, off_t off, int count, int *eof,
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void *data)
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{
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int len;
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/* data holds the NASID of the node */
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len = dump_fit(page, (unsigned long)data);
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len = proc_calc_metrics(page, start, off, count, eof, len);
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return len;
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}
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/* module entry points */
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int __init prominfo_init(void);
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void __exit prominfo_exit(void);
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module_init(prominfo_init);
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module_exit(prominfo_exit);
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static struct proc_dir_entry **proc_entries;
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static struct proc_dir_entry *sgi_prominfo_entry;
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#define NODE_NAME_LEN 11
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int __init prominfo_init(void)
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{
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struct proc_dir_entry **entp;
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cnodeid_t cnodeid;
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unsigned long nasid;
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int size;
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char name[NODE_NAME_LEN];
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if (!ia64_platform_is("sn2"))
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return 0;
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size = num_online_nodes() * sizeof(struct proc_dir_entry *);
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proc_entries = kzalloc(size, GFP_KERNEL);
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if (!proc_entries)
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return -ENOMEM;
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sgi_prominfo_entry = proc_mkdir("sgi_prominfo", NULL);
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entp = proc_entries;
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for_each_online_node(cnodeid) {
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sprintf(name, "node%d", cnodeid);
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*entp = proc_mkdir(name, sgi_prominfo_entry);
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nasid = cnodeid_to_nasid(cnodeid);
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create_proc_read_entry("fit", 0, *entp, read_fit_entry,
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(void *)nasid);
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create_proc_read_entry("version", 0, *entp,
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read_version_entry, (void *)nasid);
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entp++;
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}
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return 0;
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}
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void __exit prominfo_exit(void)
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{
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struct proc_dir_entry **entp;
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unsigned int cnodeid;
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char name[NODE_NAME_LEN];
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entp = proc_entries;
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for_each_online_node(cnodeid) {
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remove_proc_entry("fit", *entp);
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remove_proc_entry("version", *entp);
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sprintf(name, "node%d", cnodeid);
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remove_proc_entry(name, sgi_prominfo_entry);
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entp++;
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}
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remove_proc_entry("sgi_prominfo", NULL);
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kfree(proc_entries);
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}
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