mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 02:56:44 +07:00
60f85019c6
Replace IDE_TFLAG_{IN|OUT}_* flags meaning to the taskfile register validity on input/output by the IDE_VALID_* flags and introduce 4 symmetric 8-bit register validity indicator subfields, 'valid.{input/output}.{tf|hob}', into the 'struct ide_cmd' instead of using the 'tf_flags' field for that purpose (this field can then be turned from 32-bit into 8-bit one). Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
702 lines
17 KiB
C
702 lines
17 KiB
C
/*
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* Copyright (C) 1997-1998 Mark Lord
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* Copyright (C) 2003 Red Hat
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*
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* Some code was moved here from ide.c, see it for original copyrights.
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*/
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/*
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* This is the /proc/ide/ filesystem implementation.
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*
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* Drive/Driver settings can be retrieved by reading the drive's
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* "settings" files. e.g. "cat /proc/ide0/hda/settings"
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* To write a new value "val" into a specific setting "name", use:
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* echo "name:val" >/proc/ide/ide0/hda/settings
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*/
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#include <linux/module.h>
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#include <asm/uaccess.h>
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#include <linux/errno.h>
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#include <linux/proc_fs.h>
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#include <linux/stat.h>
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#include <linux/mm.h>
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#include <linux/pci.h>
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#include <linux/ctype.h>
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#include <linux/ide.h>
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#include <linux/seq_file.h>
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#include <asm/io.h>
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static struct proc_dir_entry *proc_ide_root;
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static int proc_ide_read_imodel
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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ide_hwif_t *hwif = (ide_hwif_t *) data;
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int len;
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const char *name;
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switch (hwif->chipset) {
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case ide_generic: name = "generic"; break;
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case ide_pci: name = "pci"; break;
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case ide_cmd640: name = "cmd640"; break;
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case ide_dtc2278: name = "dtc2278"; break;
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case ide_ali14xx: name = "ali14xx"; break;
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case ide_qd65xx: name = "qd65xx"; break;
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case ide_umc8672: name = "umc8672"; break;
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case ide_ht6560b: name = "ht6560b"; break;
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case ide_4drives: name = "4drives"; break;
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case ide_pmac: name = "mac-io"; break;
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case ide_au1xxx: name = "au1xxx"; break;
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case ide_palm3710: name = "palm3710"; break;
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case ide_acorn: name = "acorn"; break;
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default: name = "(unknown)"; break;
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}
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len = sprintf(page, "%s\n", name);
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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static int proc_ide_read_mate
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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ide_hwif_t *hwif = (ide_hwif_t *) data;
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int len;
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if (hwif && hwif->mate)
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len = sprintf(page, "%s\n", hwif->mate->name);
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else
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len = sprintf(page, "(none)\n");
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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static int proc_ide_read_channel
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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ide_hwif_t *hwif = (ide_hwif_t *) data;
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int len;
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page[0] = hwif->channel ? '1' : '0';
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page[1] = '\n';
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len = 2;
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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static int proc_ide_read_identify
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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ide_drive_t *drive = (ide_drive_t *)data;
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int len = 0, i = 0;
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int err = 0;
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len = sprintf(page, "\n");
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if (drive) {
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__le16 *val = (__le16 *)page;
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err = taskfile_lib_get_identify(drive, page);
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if (!err) {
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char *out = (char *)page + SECTOR_SIZE;
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page = out;
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do {
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out += sprintf(out, "%04x%c",
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le16_to_cpup(val), (++i & 7) ? ' ' : '\n');
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val += 1;
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} while (i < SECTOR_SIZE / 2);
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len = out - page;
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}
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}
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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/**
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* ide_find_setting - find a specific setting
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* @st: setting table pointer
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* @name: setting name
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*
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* Scan's the setting table for a matching entry and returns
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* this or NULL if no entry is found. The caller must hold the
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* setting semaphore
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*/
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static
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const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st,
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char *name)
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{
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while (st->name) {
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if (strcmp(st->name, name) == 0)
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break;
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st++;
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}
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return st->name ? st : NULL;
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}
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/**
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* ide_read_setting - read an IDE setting
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* @drive: drive to read from
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* @setting: drive setting
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*
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* Read a drive setting and return the value. The caller
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* must hold the ide_setting_mtx when making this call.
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*
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* BUGS: the data return and error are the same return value
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* so an error -EINVAL and true return of the same value cannot
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* be told apart
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*/
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static int ide_read_setting(ide_drive_t *drive,
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const struct ide_proc_devset *setting)
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{
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const struct ide_devset *ds = setting->setting;
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int val = -EINVAL;
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if (ds->get)
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val = ds->get(drive);
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return val;
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}
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/**
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* ide_write_setting - read an IDE setting
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* @drive: drive to read from
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* @setting: drive setting
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* @val: value
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*
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* Write a drive setting if it is possible. The caller
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* must hold the ide_setting_mtx when making this call.
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*
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* BUGS: the data return and error are the same return value
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* so an error -EINVAL and true return of the same value cannot
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* be told apart
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*
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* FIXME: This should be changed to enqueue a special request
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* to the driver to change settings, and then wait on a sema for completion.
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* The current scheme of polling is kludgy, though safe enough.
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*/
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static int ide_write_setting(ide_drive_t *drive,
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const struct ide_proc_devset *setting, int val)
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{
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const struct ide_devset *ds = setting->setting;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (!ds->set)
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return -EPERM;
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if ((ds->flags & DS_SYNC)
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&& (val < setting->min || val > setting->max))
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return -EINVAL;
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return ide_devset_execute(drive, ds, val);
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}
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ide_devset_get(xfer_rate, current_speed);
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static int set_xfer_rate (ide_drive_t *drive, int arg)
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{
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struct ide_cmd cmd;
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int err;
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if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
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return -EINVAL;
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memset(&cmd, 0, sizeof(cmd));
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cmd.tf.command = ATA_CMD_SET_FEATURES;
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cmd.tf.feature = SETFEATURES_XFER;
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cmd.tf.nsect = (u8)arg;
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cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
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cmd.valid.in.tf = IDE_VALID_NSECT;
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err = ide_no_data_taskfile(drive, &cmd);
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if (!err) {
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ide_set_xfer_rate(drive, (u8) arg);
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ide_driveid_update(drive);
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}
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return err;
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}
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ide_devset_rw(current_speed, xfer_rate);
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ide_devset_rw_field(init_speed, init_speed);
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ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1);
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ide_devset_rw_field(number, dn);
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static const struct ide_proc_devset ide_generic_settings[] = {
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IDE_PROC_DEVSET(current_speed, 0, 70),
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IDE_PROC_DEVSET(init_speed, 0, 70),
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IDE_PROC_DEVSET(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1)),
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IDE_PROC_DEVSET(keepsettings, 0, 1),
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IDE_PROC_DEVSET(nice1, 0, 1),
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IDE_PROC_DEVSET(number, 0, 3),
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IDE_PROC_DEVSET(pio_mode, 0, 255),
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IDE_PROC_DEVSET(unmaskirq, 0, 1),
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IDE_PROC_DEVSET(using_dma, 0, 1),
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{ NULL },
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};
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static void proc_ide_settings_warn(void)
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{
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static int warned;
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if (warned)
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return;
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printk(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
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"obsolete, and will be removed soon!\n");
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warned = 1;
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}
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static int proc_ide_read_settings
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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const struct ide_proc_devset *setting, *g, *d;
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const struct ide_devset *ds;
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ide_drive_t *drive = (ide_drive_t *) data;
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char *out = page;
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int len, rc, mul_factor, div_factor;
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proc_ide_settings_warn();
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mutex_lock(&ide_setting_mtx);
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g = ide_generic_settings;
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d = drive->settings;
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out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
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out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
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while (g->name || (d && d->name)) {
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/* read settings in the alphabetical order */
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if (g->name && d && d->name) {
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if (strcmp(d->name, g->name) < 0)
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setting = d++;
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else
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setting = g++;
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} else if (d && d->name) {
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setting = d++;
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} else
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setting = g++;
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mul_factor = setting->mulf ? setting->mulf(drive) : 1;
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div_factor = setting->divf ? setting->divf(drive) : 1;
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out += sprintf(out, "%-24s", setting->name);
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rc = ide_read_setting(drive, setting);
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if (rc >= 0)
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out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
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else
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out += sprintf(out, "%-16s", "write-only");
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out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
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ds = setting->setting;
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if (ds->get)
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out += sprintf(out, "r");
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if (ds->set)
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out += sprintf(out, "w");
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out += sprintf(out, "\n");
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}
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len = out - page;
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mutex_unlock(&ide_setting_mtx);
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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#define MAX_LEN 30
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static int proc_ide_write_settings(struct file *file, const char __user *buffer,
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unsigned long count, void *data)
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{
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ide_drive_t *drive = (ide_drive_t *) data;
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char name[MAX_LEN + 1];
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int for_real = 0, mul_factor, div_factor;
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unsigned long n;
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const struct ide_proc_devset *setting;
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char *buf, *s;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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proc_ide_settings_warn();
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if (count >= PAGE_SIZE)
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return -EINVAL;
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s = buf = (char *)__get_free_page(GFP_USER);
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if (!buf)
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return -ENOMEM;
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if (copy_from_user(buf, buffer, count)) {
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free_page((unsigned long)buf);
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return -EFAULT;
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}
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buf[count] = '\0';
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/*
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* Skip over leading whitespace
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*/
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while (count && isspace(*s)) {
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--count;
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++s;
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}
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/*
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* Do one full pass to verify all parameters,
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* then do another to actually write the new settings.
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*/
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do {
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char *p = s;
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n = count;
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while (n > 0) {
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unsigned val;
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char *q = p;
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while (n > 0 && *p != ':') {
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--n;
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p++;
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}
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if (*p != ':')
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goto parse_error;
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if (p - q > MAX_LEN)
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goto parse_error;
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memcpy(name, q, p - q);
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name[p - q] = 0;
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if (n > 0) {
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--n;
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p++;
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} else
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goto parse_error;
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val = simple_strtoul(p, &q, 10);
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n -= q - p;
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p = q;
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if (n > 0 && !isspace(*p))
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goto parse_error;
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while (n > 0 && isspace(*p)) {
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--n;
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++p;
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}
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mutex_lock(&ide_setting_mtx);
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/* generic settings first, then driver specific ones */
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setting = ide_find_setting(ide_generic_settings, name);
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if (!setting) {
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if (drive->settings)
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setting = ide_find_setting(drive->settings, name);
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if (!setting) {
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mutex_unlock(&ide_setting_mtx);
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goto parse_error;
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}
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}
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if (for_real) {
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mul_factor = setting->mulf ? setting->mulf(drive) : 1;
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div_factor = setting->divf ? setting->divf(drive) : 1;
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ide_write_setting(drive, setting, val * div_factor / mul_factor);
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}
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mutex_unlock(&ide_setting_mtx);
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}
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} while (!for_real++);
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free_page((unsigned long)buf);
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return count;
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parse_error:
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free_page((unsigned long)buf);
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printk("proc_ide_write_settings(): parse error\n");
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return -EINVAL;
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}
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int proc_ide_read_capacity
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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int len = sprintf(page, "%llu\n", (long long)0x7fffffff);
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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EXPORT_SYMBOL_GPL(proc_ide_read_capacity);
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int proc_ide_read_geometry
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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ide_drive_t *drive = (ide_drive_t *) data;
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char *out = page;
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int len;
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out += sprintf(out, "physical %d/%d/%d\n",
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drive->cyl, drive->head, drive->sect);
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out += sprintf(out, "logical %d/%d/%d\n",
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drive->bios_cyl, drive->bios_head, drive->bios_sect);
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len = out - page;
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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EXPORT_SYMBOL(proc_ide_read_geometry);
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static int proc_ide_read_dmodel
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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ide_drive_t *drive = (ide_drive_t *) data;
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char *m = (char *)&drive->id[ATA_ID_PROD];
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int len;
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len = sprintf(page, "%.40s\n", m[0] ? m : "(none)");
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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static int proc_ide_read_driver
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(char *page, char **start, off_t off, int count, int *eof, void *data)
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{
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ide_drive_t *drive = (ide_drive_t *)data;
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struct device *dev = &drive->gendev;
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struct ide_driver *ide_drv;
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int len;
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if (dev->driver) {
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ide_drv = to_ide_driver(dev->driver);
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len = sprintf(page, "%s version %s\n",
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dev->driver->name, ide_drv->version);
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} else
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len = sprintf(page, "ide-default version 0.9.newide\n");
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PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}
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static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
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{
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struct device *dev = &drive->gendev;
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int ret = 1;
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int err;
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device_release_driver(dev);
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/* FIXME: device can still be in use by previous driver */
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strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
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err = device_attach(dev);
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if (err < 0)
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printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
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__func__, err);
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drive->driver_req[0] = 0;
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if (dev->driver == NULL) {
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err = device_attach(dev);
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if (err < 0)
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printk(KERN_WARNING
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"IDE: %s: device_attach(2) error: %d\n",
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__func__, err);
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}
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if (dev->driver && !strcmp(dev->driver->name, driver))
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ret = 0;
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return ret;
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}
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static int proc_ide_write_driver
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(struct file *file, const char __user *buffer, unsigned long count, void *data)
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{
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ide_drive_t *drive = (ide_drive_t *) data;
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char name[32];
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (count > 31)
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count = 31;
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if (copy_from_user(name, buffer, count))
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return -EFAULT;
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name[count] = '\0';
|
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if (ide_replace_subdriver(drive, name))
|
|
return -EINVAL;
|
|
return count;
|
|
}
|
|
|
|
static int proc_ide_read_media
|
|
(char *page, char **start, off_t off, int count, int *eof, void *data)
|
|
{
|
|
ide_drive_t *drive = (ide_drive_t *) data;
|
|
const char *media;
|
|
int len;
|
|
|
|
switch (drive->media) {
|
|
case ide_disk: media = "disk\n"; break;
|
|
case ide_cdrom: media = "cdrom\n"; break;
|
|
case ide_tape: media = "tape\n"; break;
|
|
case ide_floppy: media = "floppy\n"; break;
|
|
case ide_optical: media = "optical\n"; break;
|
|
default: media = "UNKNOWN\n"; break;
|
|
}
|
|
strcpy(page, media);
|
|
len = strlen(media);
|
|
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static ide_proc_entry_t generic_drive_entries[] = {
|
|
{ "driver", S_IFREG|S_IRUGO, proc_ide_read_driver,
|
|
proc_ide_write_driver },
|
|
{ "identify", S_IFREG|S_IRUSR, proc_ide_read_identify, NULL },
|
|
{ "media", S_IFREG|S_IRUGO, proc_ide_read_media, NULL },
|
|
{ "model", S_IFREG|S_IRUGO, proc_ide_read_dmodel, NULL },
|
|
{ "settings", S_IFREG|S_IRUSR|S_IWUSR, proc_ide_read_settings,
|
|
proc_ide_write_settings },
|
|
{ NULL, 0, NULL, NULL }
|
|
};
|
|
|
|
static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
|
|
{
|
|
struct proc_dir_entry *ent;
|
|
|
|
if (!dir || !p)
|
|
return;
|
|
while (p->name != NULL) {
|
|
ent = create_proc_entry(p->name, p->mode, dir);
|
|
if (!ent) return;
|
|
ent->data = data;
|
|
ent->read_proc = p->read_proc;
|
|
ent->write_proc = p->write_proc;
|
|
p++;
|
|
}
|
|
}
|
|
|
|
static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
|
|
{
|
|
if (!dir || !p)
|
|
return;
|
|
while (p->name != NULL) {
|
|
remove_proc_entry(p->name, dir);
|
|
p++;
|
|
}
|
|
}
|
|
|
|
void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver)
|
|
{
|
|
mutex_lock(&ide_setting_mtx);
|
|
drive->settings = driver->proc_devsets(drive);
|
|
mutex_unlock(&ide_setting_mtx);
|
|
|
|
ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_proc_register_driver);
|
|
|
|
/**
|
|
* ide_proc_unregister_driver - remove driver specific data
|
|
* @drive: drive
|
|
* @driver: driver
|
|
*
|
|
* Clean up the driver specific /proc files and IDE settings
|
|
* for a given drive.
|
|
*
|
|
* Takes ide_setting_mtx.
|
|
*/
|
|
|
|
void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver)
|
|
{
|
|
ide_remove_proc_entries(drive->proc, driver->proc_entries(drive));
|
|
|
|
mutex_lock(&ide_setting_mtx);
|
|
/*
|
|
* ide_setting_mtx protects both the settings list and the use
|
|
* of settings (we cannot take a setting out that is being used).
|
|
*/
|
|
drive->settings = NULL;
|
|
mutex_unlock(&ide_setting_mtx);
|
|
}
|
|
EXPORT_SYMBOL(ide_proc_unregister_driver);
|
|
|
|
void ide_proc_port_register_devices(ide_hwif_t *hwif)
|
|
{
|
|
struct proc_dir_entry *ent;
|
|
struct proc_dir_entry *parent = hwif->proc;
|
|
ide_drive_t *drive;
|
|
char name[64];
|
|
int i;
|
|
|
|
ide_port_for_each_dev(i, drive, hwif) {
|
|
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
|
|
continue;
|
|
|
|
drive->proc = proc_mkdir(drive->name, parent);
|
|
if (drive->proc)
|
|
ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
|
|
sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
|
|
ent = proc_symlink(drive->name, proc_ide_root, name);
|
|
if (!ent) return;
|
|
}
|
|
}
|
|
|
|
void ide_proc_unregister_device(ide_drive_t *drive)
|
|
{
|
|
if (drive->proc) {
|
|
ide_remove_proc_entries(drive->proc, generic_drive_entries);
|
|
remove_proc_entry(drive->name, proc_ide_root);
|
|
remove_proc_entry(drive->name, drive->hwif->proc);
|
|
drive->proc = NULL;
|
|
}
|
|
}
|
|
|
|
static ide_proc_entry_t hwif_entries[] = {
|
|
{ "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, NULL },
|
|
{ "mate", S_IFREG|S_IRUGO, proc_ide_read_mate, NULL },
|
|
{ "model", S_IFREG|S_IRUGO, proc_ide_read_imodel, NULL },
|
|
{ NULL, 0, NULL, NULL }
|
|
};
|
|
|
|
void ide_proc_register_port(ide_hwif_t *hwif)
|
|
{
|
|
if (!hwif->proc) {
|
|
hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
|
|
|
|
if (!hwif->proc)
|
|
return;
|
|
|
|
ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
|
|
}
|
|
}
|
|
|
|
void ide_proc_unregister_port(ide_hwif_t *hwif)
|
|
{
|
|
if (hwif->proc) {
|
|
ide_remove_proc_entries(hwif->proc, hwif_entries);
|
|
remove_proc_entry(hwif->name, proc_ide_root);
|
|
hwif->proc = NULL;
|
|
}
|
|
}
|
|
|
|
static int proc_print_driver(struct device_driver *drv, void *data)
|
|
{
|
|
struct ide_driver *ide_drv = to_ide_driver(drv);
|
|
struct seq_file *s = data;
|
|
|
|
seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ide_drivers_show(struct seq_file *s, void *p)
|
|
{
|
|
int err;
|
|
|
|
err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
|
|
if (err < 0)
|
|
printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
|
|
__func__, err);
|
|
return 0;
|
|
}
|
|
|
|
static int ide_drivers_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, &ide_drivers_show, NULL);
|
|
}
|
|
|
|
static const struct file_operations ide_drivers_operations = {
|
|
.owner = THIS_MODULE,
|
|
.open = ide_drivers_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
void proc_ide_create(void)
|
|
{
|
|
proc_ide_root = proc_mkdir("ide", NULL);
|
|
|
|
if (!proc_ide_root)
|
|
return;
|
|
|
|
proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
|
|
}
|
|
|
|
void proc_ide_destroy(void)
|
|
{
|
|
remove_proc_entry("drivers", proc_ide_root);
|
|
remove_proc_entry("ide", NULL);
|
|
}
|