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powerpc: Merge remaining RTAS code

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This moves rtas-proc.c and rtas_flash.c into arch/powerpc/kernel, since
cell wants them as well as pseries (and chrp can use rtas-proc.c too,
at least in principle).  rtas_fw.c is gone, with its bits moved into
rtas_flash.c and rtas.c.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras
2005-11-03 14:41:19 +11:00
父節點 398382999b
當前提交 f4fcbbe9a7
共有 12 個文件被更改，包括 147 次插入 和 185 次删除
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3
arch/powerpc/kernel/Makefile
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@@ -18,7 +18,8 @@ obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
obj-$(CONFIG_POWER4) += idle_power4.o
obj-$(CONFIG_PPC_OF) += of_device.o
obj-$(CONFIG_PPC_RTAS) += rtas.o
obj-$(CONFIG_RTAS_FW) += rtas_fw.o
obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
obj-$(CONFIG_RTAS_PROC) += rtas-proc.o
obj-$(CONFIG_IBMVIO) += vio.o
ifeq ($(CONFIG_PPC_MERGE),y)

808
arch/powerpc/kernel/rtas-proc.c Normal file
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@@ -0,0 +1,808 @@
/*
* arch/ppc64/kernel/rtas-proc.c
* Copyright (C) 2000 Tilmann Bitterberg
* (tilmann@bitterberg.de)
*
* RTAS (Runtime Abstraction Services) stuff
* Intention is to provide a clean user interface
* to use the RTAS.
*
* TODO:
* Split off a header file and maybe move it to a different
* location. Write Documentation on what the /proc/rtas/ entries
* actually do.
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/time.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/bitops.h>
#include <linux/rtc.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/machdep.h> /* for ppc_md */
#include <asm/time.h>
#include <asm/systemcfg.h>
/* Token for Sensors */
#define KEY_SWITCH 0x0001
#define ENCLOSURE_SWITCH 0x0002
#define THERMAL_SENSOR 0x0003
#define LID_STATUS 0x0004
#define POWER_SOURCE 0x0005
#define BATTERY_VOLTAGE 0x0006
#define BATTERY_REMAINING 0x0007
#define BATTERY_PERCENTAGE 0x0008
#define EPOW_SENSOR 0x0009
#define BATTERY_CYCLESTATE 0x000a
#define BATTERY_CHARGING 0x000b
/* IBM specific sensors */
#define IBM_SURVEILLANCE 0x2328 /* 9000 */
#define IBM_FANRPM 0x2329 /* 9001 */
#define IBM_VOLTAGE 0x232a /* 9002 */
#define IBM_DRCONNECTOR 0x232b /* 9003 */
#define IBM_POWERSUPPLY 0x232c /* 9004 */
/* Status return values */
#define SENSOR_CRITICAL_HIGH 13
#define SENSOR_WARNING_HIGH 12
#define SENSOR_NORMAL 11
#define SENSOR_WARNING_LOW 10
#define SENSOR_CRITICAL_LOW 9
#define SENSOR_SUCCESS 0
#define SENSOR_HW_ERROR -1
#define SENSOR_BUSY -2
#define SENSOR_NOT_EXIST -3
#define SENSOR_DR_ENTITY -9000
/* Location Codes */
#define LOC_SCSI_DEV_ADDR 'A'
#define LOC_SCSI_DEV_LOC 'B'
#define LOC_CPU 'C'
#define LOC_DISKETTE 'D'
#define LOC_ETHERNET 'E'
#define LOC_FAN 'F'
#define LOC_GRAPHICS 'G'
/* reserved / not used 'H' */
#define LOC_IO_ADAPTER 'I'
/* reserved / not used 'J' */
#define LOC_KEYBOARD 'K'
#define LOC_LCD 'L'
#define LOC_MEMORY 'M'
#define LOC_NV_MEMORY 'N'
#define LOC_MOUSE 'O'
#define LOC_PLANAR 'P'
#define LOC_OTHER_IO 'Q'
#define LOC_PARALLEL 'R'
#define LOC_SERIAL 'S'
#define LOC_DEAD_RING 'T'
#define LOC_RACKMOUNTED 'U' /* for _u_nit is rack mounted */
#define LOC_VOLTAGE 'V'
#define LOC_SWITCH_ADAPTER 'W'
#define LOC_OTHER 'X'
#define LOC_FIRMWARE 'Y'
#define LOC_SCSI 'Z'
/* Tokens for indicators */
#define TONE_FREQUENCY 0x0001 /* 0 - 1000 (HZ)*/
#define TONE_VOLUME 0x0002 /* 0 - 100 (%) */
#define SYSTEM_POWER_STATE 0x0003
#define WARNING_LIGHT 0x0004
#define DISK_ACTIVITY_LIGHT 0x0005
#define HEX_DISPLAY_UNIT 0x0006
#define BATTERY_WARNING_TIME 0x0007
#define CONDITION_CYCLE_REQUEST 0x0008
#define SURVEILLANCE_INDICATOR 0x2328 /* 9000 */
#define DR_ACTION 0x2329 /* 9001 */
#define DR_INDICATOR 0x232a /* 9002 */
/* 9003 - 9004: Vendor specific */
/* 9006 - 9999: Vendor specific */
/* other */
#define MAX_SENSORS 17 /* I only know of 17 sensors */
#define MAX_LINELENGTH 256
#define SENSOR_PREFIX "ibm,sensor-"
#define cel_to_fahr(x) ((x*9/5)+32)
/* Globals */
static struct rtas_sensors sensors;
static struct device_node *rtas_node = NULL;
static unsigned long power_on_time = 0; /* Save the time the user set */
static char progress_led[MAX_LINELENGTH];
static unsigned long rtas_tone_frequency = 1000;
static unsigned long rtas_tone_volume = 0;
/* ****************STRUCTS******************************************* */
struct individual_sensor {
unsigned int token;
unsigned int quant;
};
struct rtas_sensors {
struct individual_sensor sensor[MAX_SENSORS];
unsigned int quant;
};
/* ****************************************************************** */
/* Declarations */
static int ppc_rtas_sensors_show(struct seq_file *m, void *v);
static int ppc_rtas_clock_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_clock_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_progress_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_progress_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_poweron_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static ssize_t ppc_rtas_tone_freq_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_tone_volume_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
static int sensors_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_sensors_show, NULL);
}
struct file_operations ppc_rtas_sensors_operations = {
.open = sensors_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int poweron_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_poweron_show, NULL);
}
struct file_operations ppc_rtas_poweron_operations = {
.open = poweron_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_poweron_write,
.release = single_release,
};
static int progress_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_progress_show, NULL);
}
struct file_operations ppc_rtas_progress_operations = {
.open = progress_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_progress_write,
.release = single_release,
};
static int clock_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_clock_show, NULL);
}
struct file_operations ppc_rtas_clock_operations = {
.open = clock_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_clock_write,
.release = single_release,
};
static int tone_freq_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_tone_freq_show, NULL);
}
struct file_operations ppc_rtas_tone_freq_operations = {
.open = tone_freq_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_tone_freq_write,
.release = single_release,
};
static int tone_volume_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_tone_volume_show, NULL);
}
struct file_operations ppc_rtas_tone_volume_operations = {
.open = tone_volume_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_tone_volume_write,
.release = single_release,
};
static int rmo_buf_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_rmo_buf_show, NULL);
}
struct file_operations ppc_rtas_rmo_buf_ops = {
.open = rmo_buf_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ppc_rtas_find_all_sensors(void);
static void ppc_rtas_process_sensor(struct seq_file *m,
struct individual_sensor *s, int state, int error, char *loc);
static char *ppc_rtas_process_error(int error);
static void get_location_code(struct seq_file *m,
struct individual_sensor *s, char *loc);
static void check_location_string(struct seq_file *m, char *c);
static void check_location(struct seq_file *m, char *c);
static int __init proc_rtas_init(void)
{
struct proc_dir_entry *entry;
if (!(systemcfg->platform & PLATFORM_PSERIES))
return 1;
rtas_node = of_find_node_by_name(NULL, "rtas");
if (rtas_node == NULL)
return 1;
entry = create_proc_entry("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL);
if (entry)
entry->proc_fops = &ppc_rtas_progress_operations;
entry = create_proc_entry("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL);
if (entry)
entry->proc_fops = &ppc_rtas_clock_operations;
entry = create_proc_entry("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL);
if (entry)
entry->proc_fops = &ppc_rtas_poweron_operations;
entry = create_proc_entry("ppc64/rtas/sensors", S_IRUGO, NULL);
if (entry)
entry->proc_fops = &ppc_rtas_sensors_operations;
entry = create_proc_entry("ppc64/rtas/frequency", S_IWUSR|S_IRUGO,
NULL);
if (entry)
entry->proc_fops = &ppc_rtas_tone_freq_operations;
entry = create_proc_entry("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL);
if (entry)
entry->proc_fops = &ppc_rtas_tone_volume_operations;
entry = create_proc_entry("ppc64/rtas/rmo_buffer", S_IRUSR, NULL);
if (entry)
entry->proc_fops = &ppc_rtas_rmo_buf_ops;
return 0;
}
__initcall(proc_rtas_init);
static int parse_number(const char __user *p, size_t count, unsigned long *val)
{
char buf[40];
char *end;
if (count > 39)
return -EINVAL;
if (copy_from_user(buf, p, count))
return -EFAULT;
buf[count] = 0;
*val = simple_strtoul(buf, &end, 10);
if (*end && *end != '\n')
return -EINVAL;
return 0;
}
/* ****************************************************************** */
/* POWER-ON-TIME */
/* ****************************************************************** */
static ssize_t ppc_rtas_poweron_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
struct rtc_time tm;
unsigned long nowtime;
int error = parse_number(buf, count, &nowtime);
if (error)
return error;
power_on_time = nowtime; /* save the time */
to_tm(nowtime, &tm);
error = rtas_call(rtas_token("set-time-for-power-on"), 7, 1, NULL,
tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
if (error)
printk(KERN_WARNING "error: setting poweron time returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
{
if (power_on_time == 0)
seq_printf(m, "Power on time not set\n");
else
seq_printf(m, "%lu\n",power_on_time);
return 0;
}
/* ****************************************************************** */
/* PROGRESS */
/* ****************************************************************** */
static ssize_t ppc_rtas_progress_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
unsigned long hex;
if (count >= MAX_LINELENGTH)
count = MAX_LINELENGTH -1;
if (copy_from_user(progress_led, buf, count)) { /* save the string */
return -EFAULT;
}
progress_led[count] = 0;
/* Lets see if the user passed hexdigits */
hex = simple_strtoul(progress_led, NULL, 10);
rtas_progress ((char *)progress_led, hex);
return count;
/* clear the line */
/* rtas_progress(" ", 0xffff);*/
}
/* ****************************************************************** */
static int ppc_rtas_progress_show(struct seq_file *m, void *v)
{
if (progress_led)
seq_printf(m, "%s\n", progress_led);
return 0;
}
/* ****************************************************************** */
/* CLOCK */
/* ****************************************************************** */
static ssize_t ppc_rtas_clock_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
struct rtc_time tm;
unsigned long nowtime;
int error = parse_number(buf, count, &nowtime);
if (error)
return error;
to_tm(nowtime, &tm);
error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
if (error)
printk(KERN_WARNING "error: setting the clock returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_clock_show(struct seq_file *m, void *v)
{
int ret[8];
int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
if (error) {
printk(KERN_WARNING "error: reading the clock returned: %s\n",
ppc_rtas_process_error(error));
seq_printf(m, "0");
} else {
unsigned int year, mon, day, hour, min, sec;
year = ret[0]; mon = ret[1]; day = ret[2];
hour = ret[3]; min = ret[4]; sec = ret[5];
seq_printf(m, "%lu\n",
mktime(year, mon, day, hour, min, sec));
}
return 0;
}
/* ****************************************************************** */
/* SENSOR STUFF */
/* ****************************************************************** */
static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
{
int i,j;
int state, error;
int get_sensor_state = rtas_token("get-sensor-state");
seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
seq_printf(m, "********************************************************\n");
if (ppc_rtas_find_all_sensors() != 0) {
seq_printf(m, "\nNo sensors are available\n");
return 0;
}
for (i=0; i<sensors.quant; i++) {
struct individual_sensor *p = &sensors.sensor[i];
char rstr[64];
char *loc;
int llen, offs;
sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
loc = (char *) get_property(rtas_node, rstr, &llen);
/* A sensor may have multiple instances */
for (j = 0, offs = 0; j <= p->quant; j++) {
error = rtas_call(get_sensor_state, 2, 2, &state,
p->token, j);
ppc_rtas_process_sensor(m, p, state, error, loc);
seq_putc(m, '\n');
if (loc) {
offs += strlen(loc) + 1;
loc += strlen(loc) + 1;
if (offs >= llen)
loc = NULL;
}
}
}
return 0;
}
/* ****************************************************************** */
static int ppc_rtas_find_all_sensors(void)
{
unsigned int *utmp;
int len, i;
utmp = (unsigned int *) get_property(rtas_node, "rtas-sensors", &len);
if (utmp == NULL) {
printk (KERN_ERR "error: could not get rtas-sensors\n");
return 1;
}
sensors.quant = len / 8; /* int + int */
for (i=0; i<sensors.quant; i++) {
sensors.sensor[i].token = *utmp++;
sensors.sensor[i].quant = *utmp++;
}
return 0;
}
/* ****************************************************************** */
/*
* Builds a string of what rtas returned
*/
static char *ppc_rtas_process_error(int error)
{
switch (error) {
case SENSOR_CRITICAL_HIGH:
return "(critical high)";
case SENSOR_WARNING_HIGH:
return "(warning high)";
case SENSOR_NORMAL:
return "(normal)";
case SENSOR_WARNING_LOW:
return "(warning low)";
case SENSOR_CRITICAL_LOW:
return "(critical low)";
case SENSOR_SUCCESS:
return "(read ok)";
case SENSOR_HW_ERROR:
return "(hardware error)";
case SENSOR_BUSY:
return "(busy)";
case SENSOR_NOT_EXIST:
return "(non existent)";
case SENSOR_DR_ENTITY:
return "(dr entity removed)";
default:
return "(UNKNOWN)";
}
}
/* ****************************************************************** */
/*
* Builds a string out of what the sensor said
*/
static void ppc_rtas_process_sensor(struct seq_file *m,
struct individual_sensor *s, int state, int error, char *loc)
{
/* Defined return vales */
const char * key_switch[] = { "Off\t", "Normal\t", "Secure\t",
"Maintenance" };
const char * enclosure_switch[] = { "Closed", "Open" };
const char * lid_status[] = { " ", "Open", "Closed" };
const char * power_source[] = { "AC\t", "Battery",
"AC & Battery" };
const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
const char * epow_sensor[] = {
"EPOW Reset", "Cooling warning", "Power warning",
"System shutdown", "System halt", "EPOW main enclosure",
"EPOW power off" };
const char * battery_cyclestate[] = { "None", "In progress",
"Requested" };
const char * battery_charging[] = { "Charging", "Discharching",
"No current flow" };
const char * ibm_drconnector[] = { "Empty", "Present", "Unusable",
"Exchange" };
int have_strings = 0;
int num_states = 0;
int temperature = 0;
int unknown = 0;
/* What kind of sensor do we have here? */
switch (s->token) {
case KEY_SWITCH:
seq_printf(m, "Key switch:\t");
num_states = sizeof(key_switch) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t", key_switch[state]);
have_strings = 1;
}
break;
case ENCLOSURE_SWITCH:
seq_printf(m, "Enclosure switch:\t");
num_states = sizeof(enclosure_switch) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
enclosure_switch[state]);
have_strings = 1;
}
break;
case THERMAL_SENSOR:
seq_printf(m, "Temp. (C/F):\t");
temperature = 1;
break;
case LID_STATUS:
seq_printf(m, "Lid status:\t");
num_states = sizeof(lid_status) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t", lid_status[state]);
have_strings = 1;
}
break;
case POWER_SOURCE:
seq_printf(m, "Power source:\t");
num_states = sizeof(power_source) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
power_source[state]);
have_strings = 1;
}
break;
case BATTERY_VOLTAGE:
seq_printf(m, "Battery voltage:\t");
break;
case BATTERY_REMAINING:
seq_printf(m, "Battery remaining:\t");
num_states = sizeof(battery_remaining) / sizeof(char *);
if (state < num_states)
{
seq_printf(m, "%s\t",
battery_remaining[state]);
have_strings = 1;
}
break;
case BATTERY_PERCENTAGE:
seq_printf(m, "Battery percentage:\t");
break;
case EPOW_SENSOR:
seq_printf(m, "EPOW Sensor:\t");
num_states = sizeof(epow_sensor) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t", epow_sensor[state]);
have_strings = 1;
}
break;
case BATTERY_CYCLESTATE:
seq_printf(m, "Battery cyclestate:\t");
num_states = sizeof(battery_cyclestate) /
sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
battery_cyclestate[state]);
have_strings = 1;
}
break;
case BATTERY_CHARGING:
seq_printf(m, "Battery Charging:\t");
num_states = sizeof(battery_charging) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
battery_charging[state]);
have_strings = 1;
}
break;
case IBM_SURVEILLANCE:
seq_printf(m, "Surveillance:\t");
break;
case IBM_FANRPM:
seq_printf(m, "Fan (rpm):\t");
break;
case IBM_VOLTAGE:
seq_printf(m, "Voltage (mv):\t");
break;
case IBM_DRCONNECTOR:
seq_printf(m, "DR connector:\t");
num_states = sizeof(ibm_drconnector) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
ibm_drconnector[state]);
have_strings = 1;
}
break;
case IBM_POWERSUPPLY:
seq_printf(m, "Powersupply:\t");
break;
default:
seq_printf(m, "Unknown sensor (type %d), ignoring it\n",
s->token);
unknown = 1;
have_strings = 1;
break;
}
if (have_strings == 0) {
if (temperature) {
seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
} else
seq_printf(m, "%10d\t", state);
}
if (unknown == 0) {
seq_printf(m, "%s\t", ppc_rtas_process_error(error));
get_location_code(m, s, loc);
}
}
/* ****************************************************************** */
static void check_location(struct seq_file *m, char *c)
{
switch (c[0]) {
case LOC_PLANAR:
seq_printf(m, "Planar #%c", c[1]);
break;
case LOC_CPU:
seq_printf(m, "CPU #%c", c[1]);
break;
case LOC_FAN:
seq_printf(m, "Fan #%c", c[1]);
break;
case LOC_RACKMOUNTED:
seq_printf(m, "Rack #%c", c[1]);
break;
case LOC_VOLTAGE:
seq_printf(m, "Voltage #%c", c[1]);
break;
case LOC_LCD:
seq_printf(m, "LCD #%c", c[1]);
break;
case '.':
seq_printf(m, "- %c", c[1]);
break;
default:
seq_printf(m, "Unknown location");
break;
}
}
/* ****************************************************************** */
/*
* Format:
* ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
* the '.' may be an abbrevation
*/
static void check_location_string(struct seq_file *m, char *c)
{
while (*c) {
if (isalpha(*c) || *c == '.')
check_location(m, c);
else if (*c == '/' || *c == '-')
seq_printf(m, " at ");
c++;
}
}
/* ****************************************************************** */
static void get_location_code(struct seq_file *m, struct individual_sensor *s, char *loc)
{
if (!loc || !*loc) {
seq_printf(m, "---");/* does not have a location */
} else {
check_location_string(m, loc);
}
seq_putc(m, ' ');
}
/* ****************************************************************** */
/* INDICATORS - Tone Frequency */
/* ****************************************************************** */
static ssize_t ppc_rtas_tone_freq_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
unsigned long freq;
int error = parse_number(buf, count, &freq);
if (error)
return error;
rtas_tone_frequency = freq; /* save it for later */
error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
TONE_FREQUENCY, 0, freq);
if (error)
printk(KERN_WARNING "error: setting tone frequency returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v)
{
seq_printf(m, "%lu\n", rtas_tone_frequency);
return 0;
}
/* ****************************************************************** */
/* INDICATORS - Tone Volume */
/* ****************************************************************** */
static ssize_t ppc_rtas_tone_volume_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
unsigned long volume;
int error = parse_number(buf, count, &volume);
if (error)
return error;
if (volume > 100)
volume = 100;
rtas_tone_volume = volume; /* save it for later */
error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
TONE_VOLUME, 0, volume);
if (error)
printk(KERN_WARNING "error: setting tone volume returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
{
seq_printf(m, "%lu\n", rtas_tone_volume);
return 0;
}
#define RMO_READ_BUF_MAX 30
/* RTAS Userspace access */
static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v)
{
seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_RMOBUF_MAX);
return 0;
}

19
arch/powerpc/kernel/rtas.c
查看文件

@@ -42,6 +42,13 @@ DEFINE_SPINLOCK(rtas_data_buf_lock);
char rtas_data_buf[RTAS_DATA_BUF_SIZE] __cacheline_aligned;
unsigned long rtas_rmo_buf;
/*
* If non-NULL, this gets called when the kernel terminates.
* This is done like this so rtas_flash can be a module.
*/
void (*rtas_flash_term_hook)(int);
EXPORT_SYMBOL(rtas_flash_term_hook);
/*
* call_rtas_display_status and call_rtas_display_status_delay
* are designed only for very early low-level debugging, which
@@ -206,6 +213,7 @@ void rtas_progress(char *s, unsigned short hex)
spin_unlock(&progress_lock);
}
EXPORT_SYMBOL(rtas_progress); /* needed by rtas_flash module */
int rtas_token(const char *service)
{
@@ -492,6 +500,8 @@ int rtas_set_indicator(int indicator, int index, int new_value)
void rtas_restart(char *cmd)
{
if (rtas_flash_term_hook)
rtas_flash_term_hook(SYS_RESTART);
printk("RTAS system-reboot returned %d\n",
rtas_call(rtas_token("system-reboot"), 0, 1, NULL));
for (;;);
@@ -499,6 +509,8 @@ void rtas_restart(char *cmd)
void rtas_power_off(void)
{
if (rtas_flash_term_hook)
rtas_flash_term_hook(SYS_POWER_OFF);
/* allow power on only with power button press */
printk("RTAS power-off returned %d\n",
rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
@@ -507,7 +519,12 @@ void rtas_power_off(void)
void rtas_halt(void)
{
rtas_power_off();
if (rtas_flash_term_hook)
rtas_flash_term_hook(SYS_HALT);
/* allow power on only with power button press */
printk("RTAS power-off returned %d\n",
rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
for (;;);
}
/* Must be in the RMO region, so we place it here */

834
arch/powerpc/kernel/rtas_flash.c Normal file
查看文件

@@ -0,0 +1,834 @@
/*
* c 2001 PPC 64 Team, IBM Corp
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* /proc/ppc64/rtas/firmware_flash interface
*
* This file implements a firmware_flash interface to pump a firmware
* image into the kernel. At reboot time rtas_restart() will see the
* firmware image and flash it as it reboots (see rtas.c).
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <asm/delay.h>
#include <asm/uaccess.h>
#include <asm/rtas.h>
#include <asm/abs_addr.h>
#define MODULE_VERS "1.0"
#define MODULE_NAME "rtas_flash"
#define FIRMWARE_FLASH_NAME "firmware_flash"
#define FIRMWARE_UPDATE_NAME "firmware_update"
#define MANAGE_FLASH_NAME "manage_flash"
#define VALIDATE_FLASH_NAME "validate_flash"
/* General RTAS Status Codes */
#define RTAS_RC_SUCCESS 0
#define RTAS_RC_HW_ERR -1
#define RTAS_RC_BUSY -2
/* Flash image status values */
#define FLASH_AUTH -9002 /* RTAS Not Service Authority Partition */
#define FLASH_NO_OP -1099 /* No operation initiated by user */
#define FLASH_IMG_SHORT -1005 /* Flash image shorter than expected */
#define FLASH_IMG_BAD_LEN -1004 /* Bad length value in flash list block */
#define FLASH_IMG_NULL_DATA -1003 /* Bad data value in flash list block */
#define FLASH_IMG_READY 0 /* Firmware img ready for flash on reboot */
/* Manage image status values */
#define MANAGE_AUTH -9002 /* RTAS Not Service Authority Partition */
#define MANAGE_ACTIVE_ERR -9001 /* RTAS Cannot Overwrite Active Img */
#define MANAGE_NO_OP -1099 /* No operation initiated by user */
#define MANAGE_PARAM_ERR -3 /* RTAS Parameter Error */
#define MANAGE_HW_ERR -1 /* RTAS Hardware Error */
/* Validate image status values */
#define VALIDATE_AUTH -9002 /* RTAS Not Service Authority Partition */
#define VALIDATE_NO_OP -1099 /* No operation initiated by the user */
#define VALIDATE_INCOMPLETE -1002 /* User copied < VALIDATE_BUF_SIZE */
#define VALIDATE_READY -1001 /* Firmware image ready for validation */
#define VALIDATE_PARAM_ERR -3 /* RTAS Parameter Error */
#define VALIDATE_HW_ERR -1 /* RTAS Hardware Error */
#define VALIDATE_TMP_UPDATE 0 /* Validate Return Status */
#define VALIDATE_FLASH_AUTH 1 /* Validate Return Status */
#define VALIDATE_INVALID_IMG 2 /* Validate Return Status */
#define VALIDATE_CUR_UNKNOWN 3 /* Validate Return Status */
#define VALIDATE_TMP_COMMIT_DL 4 /* Validate Return Status */
#define VALIDATE_TMP_COMMIT 5 /* Validate Return Status */
#define VALIDATE_TMP_UPDATE_DL 6 /* Validate Return Status */
/* ibm,manage-flash-image operation tokens */
#define RTAS_REJECT_TMP_IMG 0
#define RTAS_COMMIT_TMP_IMG 1
/* Array sizes */
#define VALIDATE_BUF_SIZE 4096
#define RTAS_MSG_MAXLEN 64
struct flash_block {
char *data;
unsigned long length;
};
/* This struct is very similar but not identical to
* that needed by the rtas flash update.
* All we need to do for rtas is rewrite num_blocks
* into a version/length and translate the pointers
* to absolute.
*/
#define FLASH_BLOCKS_PER_NODE ((PAGE_SIZE - 16) / sizeof(struct flash_block))
struct flash_block_list {
unsigned long num_blocks;
struct flash_block_list *next;
struct flash_block blocks[FLASH_BLOCKS_PER_NODE];
};
struct flash_block_list_header { /* just the header of flash_block_list */
unsigned long num_blocks;
struct flash_block_list *next;
};
static struct flash_block_list_header rtas_firmware_flash_list = {0, NULL};
#define FLASH_BLOCK_LIST_VERSION (1UL)
/* Local copy of the flash block list.
* We only allow one open of the flash proc file and create this
* list as we go. This list will be put in the
* rtas_firmware_flash_list var once it is fully read.
*
* For convenience as we build the list we use virtual addrs,
* we do not fill in the version number, and the length field
* is treated as the number of entries currently in the block
* (i.e. not a byte count). This is all fixed on release.
*/
/* Status int must be first member of struct */
struct rtas_update_flash_t
{
int status; /* Flash update status */
struct flash_block_list *flist; /* Local copy of flash block list */
};
/* Status int must be first member of struct */
struct rtas_manage_flash_t
{
int status; /* Returned status */
unsigned int op; /* Reject or commit image */
};
/* Status int must be first member of struct */
struct rtas_validate_flash_t
{
int status; /* Returned status */
char buf[VALIDATE_BUF_SIZE]; /* Candidate image buffer */
unsigned int buf_size; /* Size of image buf */
unsigned int update_results; /* Update results token */
};
static DEFINE_SPINLOCK(flash_file_open_lock);
static struct proc_dir_entry *firmware_flash_pde;
static struct proc_dir_entry *firmware_update_pde;
static struct proc_dir_entry *validate_pde;
static struct proc_dir_entry *manage_pde;
/* Do simple sanity checks on the flash image. */
static int flash_list_valid(struct flash_block_list *flist)
{
struct flash_block_list *f;
int i;
unsigned long block_size, image_size;
/* Paranoid self test here. We also collect the image size. */
image_size = 0;
for (f = flist; f; f = f->next) {
for (i = 0; i < f->num_blocks; i++) {
if (f->blocks[i].data == NULL) {
return FLASH_IMG_NULL_DATA;
}
block_size = f->blocks[i].length;
if (block_size <= 0 || block_size > PAGE_SIZE) {
return FLASH_IMG_BAD_LEN;
}
image_size += block_size;
}
}
if (image_size < (256 << 10)) {
if (image_size < 2)
return FLASH_NO_OP;
}
printk(KERN_INFO "FLASH: flash image with %ld bytes stored for hardware flash on reboot\n", image_size);
return FLASH_IMG_READY;
}
static void free_flash_list(struct flash_block_list *f)
{
struct flash_block_list *next;
int i;
while (f) {
for (i = 0; i < f->num_blocks; i++)
free_page((unsigned long)(f->blocks[i].data));
next = f->next;
free_page((unsigned long)f);
f = next;
}
}
static int rtas_flash_release(struct inode *inode, struct file *file)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_update_flash_t *uf;
uf = (struct rtas_update_flash_t *) dp->data;
if (uf->flist) {
/* File was opened in write mode for a new flash attempt */
/* Clear saved list */
if (rtas_firmware_flash_list.next) {
free_flash_list(rtas_firmware_flash_list.next);
rtas_firmware_flash_list.next = NULL;
}
if (uf->status != FLASH_AUTH)
uf->status = flash_list_valid(uf->flist);
if (uf->status == FLASH_IMG_READY)
rtas_firmware_flash_list.next = uf->flist;
else
free_flash_list(uf->flist);
uf->flist = NULL;
}
atomic_dec(&dp->count);
return 0;
}
static void get_flash_status_msg(int status, char *buf)
{
char *msg;
switch (status) {
case FLASH_AUTH:
msg = "error: this partition does not have service authority\n";
break;
case FLASH_NO_OP:
msg = "info: no firmware image for flash\n";
break;
case FLASH_IMG_SHORT:
msg = "error: flash image short\n";
break;
case FLASH_IMG_BAD_LEN:
msg = "error: internal error bad length\n";
break;
case FLASH_IMG_NULL_DATA:
msg = "error: internal error null data\n";
break;
case FLASH_IMG_READY:
msg = "ready: firmware image ready for flash on reboot\n";
break;
default:
sprintf(buf, "error: unexpected status value %d\n", status);
return;
}
strcpy(buf, msg);
}
/* Reading the proc file will show status (not the firmware contents) */
static ssize_t rtas_flash_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_update_flash_t *uf;
char msg[RTAS_MSG_MAXLEN];
int msglen;
uf = (struct rtas_update_flash_t *) dp->data;
if (!strcmp(dp->name, FIRMWARE_FLASH_NAME)) {
get_flash_status_msg(uf->status, msg);
} else { /* FIRMWARE_UPDATE_NAME */
sprintf(msg, "%d\n", uf->status);
}
msglen = strlen(msg);
if (msglen > count)
msglen = count;
if (ppos && *ppos != 0)
return 0; /* be cheap */
if (!access_ok(VERIFY_WRITE, buf, msglen))
return -EINVAL;
if (copy_to_user(buf, msg, msglen))
return -EFAULT;
if (ppos)
*ppos = msglen;
return msglen;
}
/* We could be much more efficient here. But to keep this function
* simple we allocate a page to the block list no matter how small the
* count is. If the system is low on memory it will be just as well
* that we fail....
*/
static ssize_t rtas_flash_write(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_update_flash_t *uf;
char *p;
int next_free;
struct flash_block_list *fl;
uf = (struct rtas_update_flash_t *) dp->data;
if (uf->status == FLASH_AUTH || count == 0)
return count; /* discard data */
/* In the case that the image is not ready for flashing, the memory
* allocated for the block list will be freed upon the release of the
* proc file
*/
if (uf->flist == NULL) {
uf->flist = (struct flash_block_list *) get_zeroed_page(GFP_KERNEL);
if (!uf->flist)
return -ENOMEM;
}
fl = uf->flist;
while (fl->next)
fl = fl->next; /* seek to last block_list for append */
next_free = fl->num_blocks;
if (next_free == FLASH_BLOCKS_PER_NODE) {
/* Need to allocate another block_list */
fl->next = (struct flash_block_list *)get_zeroed_page(GFP_KERNEL);
if (!fl->next)
return -ENOMEM;
fl = fl->next;
next_free = 0;
}
if (count > PAGE_SIZE)
count = PAGE_SIZE;
p = (char *)get_zeroed_page(GFP_KERNEL);
if (!p)
return -ENOMEM;
if(copy_from_user(p, buffer, count)) {
free_page((unsigned long)p);
return -EFAULT;
}
fl->blocks[next_free].data = p;
fl->blocks[next_free].length = count;
fl->num_blocks++;
return count;
}
static int rtas_excl_open(struct inode *inode, struct file *file)
{
struct proc_dir_entry *dp = PDE(inode);
/* Enforce exclusive open with use count of PDE */
spin_lock(&flash_file_open_lock);
if (atomic_read(&dp->count) > 1) {
spin_unlock(&flash_file_open_lock);
return -EBUSY;
}
atomic_inc(&dp->count);
spin_unlock(&flash_file_open_lock);
return 0;
}
static int rtas_excl_release(struct inode *inode, struct file *file)
{
struct proc_dir_entry *dp = PDE(inode);
atomic_dec(&dp->count);
return 0;
}
static void manage_flash(struct rtas_manage_flash_t *args_buf)
{
unsigned int wait_time;
s32 rc;
while (1) {
rc = rtas_call(rtas_token("ibm,manage-flash-image"), 1,
1, NULL, args_buf->op);
if (rc == RTAS_RC_BUSY)
udelay(1);
else if (rtas_is_extended_busy(rc)) {
wait_time = rtas_extended_busy_delay_time(rc);
udelay(wait_time * 1000);
} else
break;
}
args_buf->status = rc;
}
static ssize_t manage_flash_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_manage_flash_t *args_buf;
char msg[RTAS_MSG_MAXLEN];
int msglen;
args_buf = (struct rtas_manage_flash_t *) dp->data;
if (args_buf == NULL)
return 0;
msglen = sprintf(msg, "%d\n", args_buf->status);
if (msglen > count)
msglen = count;
if (ppos && *ppos != 0)
return 0; /* be cheap */
if (!access_ok(VERIFY_WRITE, buf, msglen))
return -EINVAL;
if (copy_to_user(buf, msg, msglen))
return -EFAULT;
if (ppos)
*ppos = msglen;
return msglen;
}
static ssize_t manage_flash_write(struct file *file, const char __user *buf,
size_t count, loff_t *off)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_manage_flash_t *args_buf;
const char reject_str[] = "0";
const char commit_str[] = "1";
char stkbuf[10];
int op;
args_buf = (struct rtas_manage_flash_t *) dp->data;
if ((args_buf->status == MANAGE_AUTH) || (count == 0))
return count;
op = -1;
if (buf) {
if (count > 9) count = 9;
if (copy_from_user (stkbuf, buf, count)) {
return -EFAULT;
}
if (strncmp(stkbuf, reject_str, strlen(reject_str)) == 0)
op = RTAS_REJECT_TMP_IMG;
else if (strncmp(stkbuf, commit_str, strlen(commit_str)) == 0)
op = RTAS_COMMIT_TMP_IMG;
}
if (op == -1) /* buf is empty, or contains invalid string */
return -EINVAL;
args_buf->op = op;
manage_flash(args_buf);
return count;
}
static void validate_flash(struct rtas_validate_flash_t *args_buf)
{
int token = rtas_token("ibm,validate-flash-image");
unsigned int wait_time;
int update_results;
s32 rc;
rc = 0;
while(1) {
spin_lock(&rtas_data_buf_lock);
memcpy(rtas_data_buf, args_buf->buf, VALIDATE_BUF_SIZE);
rc = rtas_call(token, 2, 2, &update_results,
(u32) __pa(rtas_data_buf), args_buf->buf_size);
memcpy(args_buf->buf, rtas_data_buf, VALIDATE_BUF_SIZE);
spin_unlock(&rtas_data_buf_lock);
if (rc == RTAS_RC_BUSY)
udelay(1);
else if (rtas_is_extended_busy(rc)) {
wait_time = rtas_extended_busy_delay_time(rc);
udelay(wait_time * 1000);
} else
break;
}
args_buf->status = rc;
args_buf->update_results = update_results;
}
static int get_validate_flash_msg(struct rtas_validate_flash_t *args_buf,
char *msg)
{
int n;
if (args_buf->status >= VALIDATE_TMP_UPDATE) {
n = sprintf(msg, "%d\n", args_buf->update_results);
if ((args_buf->update_results >= VALIDATE_CUR_UNKNOWN) ||
(args_buf->update_results == VALIDATE_TMP_UPDATE))
n += sprintf(msg + n, "%s\n", args_buf->buf);
} else {
n = sprintf(msg, "%d\n", args_buf->status);
}
return n;
}
static ssize_t validate_flash_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_validate_flash_t *args_buf;
char msg[RTAS_MSG_MAXLEN];
int msglen;
args_buf = (struct rtas_validate_flash_t *) dp->data;
if (ppos && *ppos != 0)
return 0; /* be cheap */
msglen = get_validate_flash_msg(args_buf, msg);
if (msglen > count)
msglen = count;
if (!access_ok(VERIFY_WRITE, buf, msglen))
return -EINVAL;
if (copy_to_user(buf, msg, msglen))
return -EFAULT;
if (ppos)
*ppos = msglen;
return msglen;
}
static ssize_t validate_flash_write(struct file *file, const char __user *buf,
size_t count, loff_t *off)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_validate_flash_t *args_buf;
int rc;
args_buf = (struct rtas_validate_flash_t *) dp->data;
if (dp->data == NULL) {
dp->data = kmalloc(sizeof(struct rtas_validate_flash_t),
GFP_KERNEL);
if (dp->data == NULL)
return -ENOMEM;
}
/* We are only interested in the first 4K of the
* candidate image */
if ((*off >= VALIDATE_BUF_SIZE) ||
(args_buf->status == VALIDATE_AUTH)) {
*off += count;
return count;
}
if (*off + count >= VALIDATE_BUF_SIZE) {
count = VALIDATE_BUF_SIZE - *off;
args_buf->status = VALIDATE_READY;
} else {
args_buf->status = VALIDATE_INCOMPLETE;
}
if (!access_ok(VERIFY_READ, buf, count)) {
rc = -EFAULT;
goto done;
}
if (copy_from_user(args_buf->buf + *off, buf, count)) {
rc = -EFAULT;
goto done;
}
*off += count;
rc = count;
done:
if (rc < 0) {
kfree(dp->data);
dp->data = NULL;
}
return rc;
}
static int validate_flash_release(struct inode *inode, struct file *file)
{
struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
struct rtas_validate_flash_t *args_buf;
args_buf = (struct rtas_validate_flash_t *) dp->data;
if (args_buf->status == VALIDATE_READY) {
args_buf->buf_size = VALIDATE_BUF_SIZE;
validate_flash(args_buf);
}
/* The matching atomic_inc was in rtas_excl_open() */
atomic_dec(&dp->count);
return 0;
}
static void rtas_flash_firmware(int reboot_type)
{
unsigned long image_size;
struct flash_block_list *f, *next, *flist;
unsigned long rtas_block_list;
int i, status, update_token;
if (rtas_firmware_flash_list.next == NULL)
return; /* nothing to do */
if (reboot_type != SYS_RESTART) {
printk(KERN_ALERT "FLASH: firmware flash requires a reboot\n");
printk(KERN_ALERT "FLASH: the firmware image will NOT be flashed\n");
return;
}
update_token = rtas_token("ibm,update-flash-64-and-reboot");
if (update_token == RTAS_UNKNOWN_SERVICE) {
printk(KERN_ALERT "FLASH: ibm,update-flash-64-and-reboot "
"is not available -- not a service partition?\n");
printk(KERN_ALERT "FLASH: firmware will not be flashed\n");
return;
}
/* NOTE: the "first" block list is a global var with no data
* blocks in the kernel data segment. We do this because
* we want to ensure this block_list addr is under 4GB.
*/
rtas_firmware_flash_list.num_blocks = 0;
flist = (struct flash_block_list *)&rtas_firmware_flash_list;
rtas_block_list = virt_to_abs(flist);
if (rtas_block_list >= 4UL*1024*1024*1024) {
printk(KERN_ALERT "FLASH: kernel bug...flash list header addr above 4GB\n");
return;
}
printk(KERN_ALERT "FLASH: preparing saved firmware image for flash\n");
/* Update the block_list in place. */
image_size = 0;
for (f = flist; f; f = next) {
/* Translate data addrs to absolute */
for (i = 0; i < f->num_blocks; i++) {
f->blocks[i].data = (char *)virt_to_abs(f->blocks[i].data);
image_size += f->blocks[i].length;
}
next = f->next;
/* Don't translate NULL pointer for last entry */
if (f->next)
f->next = (struct flash_block_list *)virt_to_abs(f->next);
else
f->next = NULL;
/* make num_blocks into the version/length field */
f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16);
}
printk(KERN_ALERT "FLASH: flash image is %ld bytes\n", image_size);
printk(KERN_ALERT "FLASH: performing flash and reboot\n");
rtas_progress("Flashing \n", 0x0);
rtas_progress("Please Wait... ", 0x0);
printk(KERN_ALERT "FLASH: this will take several minutes. Do not power off!\n");
status = rtas_call(update_token, 1, 1, NULL, rtas_block_list);
switch (status) { /* should only get "bad" status */
case 0:
printk(KERN_ALERT "FLASH: success\n");
break;
case -1:
printk(KERN_ALERT "FLASH: hardware error. Firmware may not be not flashed\n");
break;
case -3:
printk(KERN_ALERT "FLASH: image is corrupt or not correct for this platform. Firmware not flashed\n");
break;
case -4:
printk(KERN_ALERT "FLASH: flash failed when partially complete. System may not reboot\n");
break;
default:
printk(KERN_ALERT "FLASH: unknown flash return code %d\n", status);
break;
}
}
static void remove_flash_pde(struct proc_dir_entry *dp)
{
if (dp) {
if (dp->data != NULL)
kfree(dp->data);
dp->owner = NULL;
remove_proc_entry(dp->name, dp->parent);
}
}
static int initialize_flash_pde_data(const char *rtas_call_name,
size_t buf_size,
struct proc_dir_entry *dp)
{
int *status;
int token;
dp->data = kmalloc(buf_size, GFP_KERNEL);
if (dp->data == NULL) {
remove_flash_pde(dp);
return -ENOMEM;
}
memset(dp->data, 0, buf_size);
/*
* This code assumes that the status int is the first member of the
* struct
*/
status = (int *) dp->data;
token = rtas_token(rtas_call_name);
if (token == RTAS_UNKNOWN_SERVICE)
*status = FLASH_AUTH;
else
*status = FLASH_NO_OP;
return 0;
}
static struct proc_dir_entry *create_flash_pde(const char *filename,
struct file_operations *fops)
{
struct proc_dir_entry *ent = NULL;
ent = create_proc_entry(filename, S_IRUSR | S_IWUSR, NULL);
if (ent != NULL) {
ent->nlink = 1;
ent->proc_fops = fops;
ent->owner = THIS_MODULE;
}
return ent;
}
static struct file_operations rtas_flash_operations = {
.read = rtas_flash_read,
.write = rtas_flash_write,
.open = rtas_excl_open,
.release = rtas_flash_release,
};
static struct file_operations manage_flash_operations = {
.read = manage_flash_read,
.write = manage_flash_write,
.open = rtas_excl_open,
.release = rtas_excl_release,
};
static struct file_operations validate_flash_operations = {
.read = validate_flash_read,
.write = validate_flash_write,
.open = rtas_excl_open,
.release = validate_flash_release,
};
int __init rtas_flash_init(void)
{
int rc;
if (rtas_token("ibm,update-flash-64-and-reboot") ==
RTAS_UNKNOWN_SERVICE) {
printk(KERN_ERR "rtas_flash: no firmware flash support\n");
return 1;
}
firmware_flash_pde = create_flash_pde("ppc64/rtas/"
FIRMWARE_FLASH_NAME,
&rtas_flash_operations);
if (firmware_flash_pde == NULL) {
rc = -ENOMEM;
goto cleanup;
}
rc = initialize_flash_pde_data("ibm,update-flash-64-and-reboot",
sizeof(struct rtas_update_flash_t),
firmware_flash_pde);
if (rc != 0)
goto cleanup;
firmware_update_pde = create_flash_pde("ppc64/rtas/"
FIRMWARE_UPDATE_NAME,
&rtas_flash_operations);
if (firmware_update_pde == NULL) {
rc = -ENOMEM;
goto cleanup;
}
rc = initialize_flash_pde_data("ibm,update-flash-64-and-reboot",
sizeof(struct rtas_update_flash_t),
firmware_update_pde);
if (rc != 0)
goto cleanup;
validate_pde = create_flash_pde("ppc64/rtas/" VALIDATE_FLASH_NAME,
&validate_flash_operations);
if (validate_pde == NULL) {
rc = -ENOMEM;
goto cleanup;
}
rc = initialize_flash_pde_data("ibm,validate-flash-image",
sizeof(struct rtas_validate_flash_t),
validate_pde);
if (rc != 0)
goto cleanup;
manage_pde = create_flash_pde("ppc64/rtas/" MANAGE_FLASH_NAME,
&manage_flash_operations);
if (manage_pde == NULL) {
rc = -ENOMEM;
goto cleanup;
}
rc = initialize_flash_pde_data("ibm,manage-flash-image",
sizeof(struct rtas_manage_flash_t),
manage_pde);
if (rc != 0)
goto cleanup;
rtas_flash_term_hook = rtas_flash_firmware;
return 0;
cleanup:
remove_flash_pde(firmware_flash_pde);
remove_flash_pde(firmware_update_pde);
remove_flash_pde(validate_pde);
remove_flash_pde(manage_pde);
return rc;
}
void __exit rtas_flash_cleanup(void)
{
rtas_flash_term_hook = NULL;
remove_flash_pde(firmware_flash_pde);
remove_flash_pde(firmware_update_pde);
remove_flash_pde(validate_pde);
remove_flash_pde(manage_pde);
}
module_init(rtas_flash_init);
module_exit(rtas_flash_cleanup);
MODULE_LICENSE("GPL");

136
arch/powerpc/kernel/rtas_fw.c
查看文件

@@ -1,136 +0,0 @@
/*
*
* Procedures for firmware flash updates.
*
* Peter Bergner, IBM March 2001.
* Copyright (C) 2001 IBM.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <stdarg.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/init.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/semaphore.h>
#include <asm/machdep.h>
#include <asm/page.h>
#include <asm/param.h>
#include <asm/system.h>
#include <asm/abs_addr.h>
#include <asm/udbg.h>
#include <asm/delay.h>
#include <asm/uaccess.h>
#include <asm/systemcfg.h>
struct flash_block_list_header rtas_firmware_flash_list = {0, NULL};
#define FLASH_BLOCK_LIST_VERSION (1UL)
static void rtas_flash_firmware(void)
{
unsigned long image_size;
struct flash_block_list *f, *next, *flist;
unsigned long rtas_block_list;
int i, status, update_token;
update_token = rtas_token("ibm,update-flash-64-and-reboot");
if (update_token == RTAS_UNKNOWN_SERVICE) {
printk(KERN_ALERT "FLASH: ibm,update-flash-64-and-reboot is not available -- not a service partition?\n");
printk(KERN_ALERT "FLASH: firmware will not be flashed\n");
return;
}
/* NOTE: the "first" block list is a global var with no data
* blocks in the kernel data segment. We do this because
* we want to ensure this block_list addr is under 4GB.
*/
rtas_firmware_flash_list.num_blocks = 0;
flist = (struct flash_block_list *)&rtas_firmware_flash_list;
rtas_block_list = virt_to_abs(flist);
if (rtas_block_list >= 4UL*1024*1024*1024) {
printk(KERN_ALERT "FLASH: kernel bug...flash list header addr above 4GB\n");
return;
}
printk(KERN_ALERT "FLASH: preparing saved firmware image for flash\n");
/* Update the block_list in place. */
image_size = 0;
for (f = flist; f; f = next) {
/* Translate data addrs to absolute */
for (i = 0; i < f->num_blocks; i++) {
f->blocks[i].data = (char *)virt_to_abs(f->blocks[i].data);
image_size += f->blocks[i].length;
}
next = f->next;
/* Don't translate NULL pointer for last entry */
if (f->next)
f->next = (struct flash_block_list *)virt_to_abs(f->next);
else
f->next = NULL;
/* make num_blocks into the version/length field */
f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16);
}
printk(KERN_ALERT "FLASH: flash image is %ld bytes\n", image_size);
printk(KERN_ALERT "FLASH: performing flash and reboot\n");
rtas_progress("Flashing \n", 0x0);
rtas_progress("Please Wait... ", 0x0);
printk(KERN_ALERT "FLASH: this will take several minutes. Do not power off!\n");
status = rtas_call(update_token, 1, 1, NULL, rtas_block_list);
switch (status) { /* should only get "bad" status */
case 0:
printk(KERN_ALERT "FLASH: success\n");
break;
case -1:
printk(KERN_ALERT "FLASH: hardware error. Firmware may not be not flashed\n");
break;
case -3:
printk(KERN_ALERT "FLASH: image is corrupt or not correct for this platform. Firmware not flashed\n");
break;
case -4:
printk(KERN_ALERT "FLASH: flash failed when partially complete. System may not reboot\n");
break;
default:
printk(KERN_ALERT "FLASH: unknown flash return code %d\n", status);
break;
}
}
void rtas_flash_bypass_warning(void)
{
printk(KERN_ALERT "FLASH: firmware flash requires a reboot\n");
printk(KERN_ALERT "FLASH: the firmware image will NOT be flashed\n");
}
void rtas_fw_restart(char *cmd)
{
if (rtas_firmware_flash_list.next)
rtas_flash_firmware();
rtas_restart(cmd);
}
void rtas_fw_power_off(void)
{
if (rtas_firmware_flash_list.next)
rtas_flash_bypass_warning();
rtas_power_off();
}
void rtas_fw_halt(void)
{
if (rtas_firmware_flash_list.next)
rtas_flash_bypass_warning();
rtas_halt();
}
EXPORT_SYMBOL(rtas_firmware_flash_list);