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raspberrypi-kernel
提交 2551aebc 编写于 作者: R Ralf Baechle
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MIPS: MT: Remove kspd. 

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
上级 2eaaac50
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arch/mips/Kconfig
浏览文件 @ 2551aebc
......@@ -2039,16 +2039,6 @@ config MIPS_VPE_APSP_API
depends on MIPS_VPE_LOADER
help
config MIPS_APSP_KSPD
bool "Enable KSPD"
depends on MIPS_VPE_APSP_API
default y
help
KSPD is a kernel daemon that accepts syscall requests from the SP
side, actions them and returns the results. It also handles the
"exit" syscall notifying other kernel modules the SP program is
exiting. You probably want to say yes here.
config MIPS_CMP
bool "MIPS CMP framework support"
depends on SYS_SUPPORTS_MIPS_CMP
......
arch/mips/include/asm/kspd.h
浏览文件 @ 2551aebc
......@@ -25,12 +25,8 @@ struct kspd_notifications {
struct list_head list;
};
#ifdef CONFIG_MIPS_APSP_KSPD
extern void kspd_notify(struct kspd_notifications *notify);
#else
static inline void kspd_notify(struct kspd_notifications *notify)
{
}
#endif
#endif
arch/mips/kernel/Makefile
浏览文件 @ 2551aebc
......@@ -53,7 +53,6 @@ obj-$(CONFIG_CPU_MIPSR2) += spram.o
obj-$(CONFIG_MIPS_VPE_LOADER) += vpe.o
obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
obj-$(CONFIG_MIPS_APSP_KSPD) += kspd.o
obj-$(CONFIG_I8259) += i8259.o
obj-$(CONFIG_IRQ_CPU) += irq_cpu.o
......
arch/mips/kernel/kspd.c 已删除 100644 → 0
浏览文件 @ 2eaaac50
/*
* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/unistd.h>
#include <linux/file.h>
#include <linux/fdtable.h>
#include <linux/fs.h>
#include <linux/syscalls.h>
#include <linux/workqueue.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <asm/vpe.h>
#include <asm/rtlx.h>
#include <asm/kspd.h>
static struct workqueue_struct *workqueue;
static struct work_struct work;
extern unsigned long cpu_khz;
struct mtsp_syscall {
int cmd;
unsigned char abi;
unsigned char size;
};
struct mtsp_syscall_ret {
int retval;
int errno;
};
struct mtsp_syscall_generic {
int arg0;
int arg1;
int arg2;
int arg3;
int arg4;
int arg5;
int arg6;
};
static struct list_head kspd_notifylist;
static int sp_stopping;
/* these should match with those in the SDE kit */
#define MTSP_SYSCALL_BASE 0
#define MTSP_SYSCALL_EXIT (MTSP_SYSCALL_BASE + 0)
#define MTSP_SYSCALL_OPEN (MTSP_SYSCALL_BASE + 1)
#define MTSP_SYSCALL_READ (MTSP_SYSCALL_BASE + 2)
#define MTSP_SYSCALL_WRITE (MTSP_SYSCALL_BASE + 3)
#define MTSP_SYSCALL_CLOSE (MTSP_SYSCALL_BASE + 4)
#define MTSP_SYSCALL_LSEEK32 (MTSP_SYSCALL_BASE + 5)
#define MTSP_SYSCALL_ISATTY (MTSP_SYSCALL_BASE + 6)
#define MTSP_SYSCALL_GETTIME (MTSP_SYSCALL_BASE + 7)
#define MTSP_SYSCALL_PIPEFREQ (MTSP_SYSCALL_BASE + 8)
#define MTSP_SYSCALL_GETTOD (MTSP_SYSCALL_BASE + 9)
#define MTSP_SYSCALL_IOCTL (MTSP_SYSCALL_BASE + 10)
#define MTSP_O_RDONLY 0x0000
#define MTSP_O_WRONLY 0x0001
#define MTSP_O_RDWR 0x0002
#define MTSP_O_NONBLOCK 0x0004
#define MTSP_O_APPEND 0x0008
#define MTSP_O_SHLOCK 0x0010
#define MTSP_O_EXLOCK 0x0020
#define MTSP_O_ASYNC 0x0040
/* XXX: check which of these is actually O_SYNC vs O_DSYNC */
#define MTSP_O_FSYNC O_SYNC
#define MTSP_O_NOFOLLOW 0x0100
#define MTSP_O_SYNC 0x0080
#define MTSP_O_CREAT 0x0200
#define MTSP_O_TRUNC 0x0400
#define MTSP_O_EXCL 0x0800
#define MTSP_O_BINARY 0x8000
extern int tclimit;
struct apsp_table {
int sp;
int ap;
};
/* we might want to do the mode flags too */
struct apsp_table open_flags_table[] = {
{ MTSP_O_RDWR, O_RDWR },
{ MTSP_O_WRONLY, O_WRONLY },
{ MTSP_O_CREAT, O_CREAT },
{ MTSP_O_TRUNC, O_TRUNC },
{ MTSP_O_NONBLOCK, O_NONBLOCK },
{ MTSP_O_APPEND, O_APPEND },
{ MTSP_O_NOFOLLOW, O_NOFOLLOW }
};
struct apsp_table syscall_command_table[] = {
{ MTSP_SYSCALL_OPEN, __NR_open },
{ MTSP_SYSCALL_CLOSE, __NR_close },
{ MTSP_SYSCALL_READ, __NR_read },
{ MTSP_SYSCALL_WRITE, __NR_write },
{ MTSP_SYSCALL_LSEEK32, __NR_lseek },
{ MTSP_SYSCALL_IOCTL, __NR_ioctl }
};
static int sp_syscall(int num, int arg0, int arg1, int arg2, int arg3)
{
register long int _num __asm__("$2") = num;
register long int _arg0 __asm__("$4") = arg0;
register long int _arg1 __asm__("$5") = arg1;
register long int _arg2 __asm__("$6") = arg2;
register long int _arg3 __asm__("$7") = arg3;
mm_segment_t old_fs;
old_fs = get_fs();
set_fs(KERNEL_DS);
__asm__ __volatile__ (
" syscall \n"
: "=r" (_num), "=r" (_arg3)
: "r" (_num), "r" (_arg0), "r" (_arg1), "r" (_arg2), "r" (_arg3));
set_fs(old_fs);
/* $a3 is error flag */
if (_arg3)
return -_num;
return _num;
}
static int translate_syscall_command(int cmd)
{
int i;
int ret = -1;
for (i = 0; i < ARRAY_SIZE(syscall_command_table); i++) {
if ((cmd == syscall_command_table[i].sp))
return syscall_command_table[i].ap;
}
return ret;
}
static unsigned int translate_open_flags(int flags)
{
int i;
unsigned int ret = 0;
for (i = 0; i < ARRAY_SIZE(open_flags_table); i++) {
if( (flags & open_flags_table[i].sp) ) {
ret |= open_flags_table[i].ap;
}
}
return ret;
}
static int sp_setfsuidgid(uid_t uid, gid_t gid)
{
struct cred *new;
new = prepare_creds();
if (!new)
return -ENOMEM;
new->fsuid = uid;
new->fsgid = gid;
commit_creds(new);
return 0;
}
/*
* Expects a request to be on the sysio channel. Reads it. Decides whether
* its a linux syscall and runs it, or whatever. Puts the return code back
* into the request and sends the whole thing back.
*/
void sp_work_handle_request(void)
{
struct mtsp_syscall sc;
struct mtsp_syscall_generic generic;
struct mtsp_syscall_ret ret;
struct kspd_notifications *n;
unsigned long written;
mm_segment_t old_fs;
struct timeval tv;
struct timezone tz;
int err, cmd;
char *vcwd;
int size;
ret.retval = -1;
old_fs = get_fs();
set_fs(KERNEL_DS);
if (!rtlx_read(RTLX_CHANNEL_SYSIO, &sc, sizeof(struct mtsp_syscall))) {
set_fs(old_fs);
printk(KERN_ERR "Expected request but nothing to read\n");
return;
}
size = sc.size;
if (size) {
if (!rtlx_read(RTLX_CHANNEL_SYSIO, &generic, size)) {
set_fs(old_fs);
printk(KERN_ERR "Expected request but nothing to read\n");
return;
}
}
/* Run the syscall at the privilege of the user who loaded the
SP program */
if (vpe_getuid(tclimit)) {
err = sp_setfsuidgid(vpe_getuid(tclimit), vpe_getgid(tclimit));
if (!err)
pr_err("Change of creds failed\n");
}
switch (sc.cmd) {
/* needs the flags argument translating from SDE kit to
linux */
case MTSP_SYSCALL_PIPEFREQ:
ret.retval = cpu_khz * 1000;
ret.errno = 0;
break;
case MTSP_SYSCALL_GETTOD:
memset(&tz, 0, sizeof(tz));
if ((ret.retval = sp_syscall(__NR_gettimeofday, (int)&tv,
(int)&tz, 0, 0)) == 0)
ret.retval = tv.tv_sec;
break;
case MTSP_SYSCALL_EXIT:
list_for_each_entry(n, &kspd_notifylist, list)
n->kspd_sp_exit(tclimit);
sp_stopping = 1;
printk(KERN_DEBUG "KSPD got exit syscall from SP exitcode %d\n",
generic.arg0);
break;
case MTSP_SYSCALL_OPEN:
generic.arg1 = translate_open_flags(generic.arg1);
vcwd = vpe_getcwd(tclimit);
/* change to cwd of the process that loaded the SP program */
old_fs = get_fs();
set_fs(KERNEL_DS);
sys_chdir(vcwd);
set_fs(old_fs);
sc.cmd = __NR_open;
/* fall through */
default:
if ((sc.cmd >= __NR_Linux) &&
(sc.cmd <= (__NR_Linux + __NR_Linux_syscalls)) )
cmd = sc.cmd;
else
cmd = translate_syscall_command(sc.cmd);
if (cmd >= 0) {
ret.retval = sp_syscall(cmd, generic.arg0, generic.arg1,
generic.arg2, generic.arg3);
} else
printk(KERN_WARNING
"KSPD: Unknown SP syscall number %d\n", sc.cmd);
break;
} /* switch */
if (vpe_getuid(tclimit)) {
err = sp_setfsuidgid(0, 0);
if (!err)
pr_err("restoring old creds failed\n");
}
old_fs = get_fs();
set_fs(KERNEL_DS);
written = rtlx_write(RTLX_CHANNEL_SYSIO, &ret, sizeof(ret));
set_fs(old_fs);
if (written < sizeof(ret))
printk("KSPD: sp_work_handle_request failed to send to SP\n");
}
static void sp_cleanup(void)
{
struct files_struct *files = current->files;
int i, j;
struct fdtable *fdt;
j = 0;
/*
* It is safe to dereference the fd table without RCU or
* ->file_lock
*/
fdt = files_fdtable(files);
for (;;) {
unsigned long set;
i = j * BITS_PER_LONG;
if (i >= fdt->max_fds)
break;
set = fdt->open_fds[j++];
while (set) {
if (set & 1) {
struct file * file = xchg(&fdt->fd[i], NULL);
if (file)
filp_close(file, files);
}
i++;
set >>= 1;
}
}
/* Put daemon cwd back to root to avoid umount problems */
sys_chdir("/");
}
static int channel_open;
/* the work handler */
static void sp_work(struct work_struct *unused)
{
if (!channel_open) {
if( rtlx_open(RTLX_CHANNEL_SYSIO, 1) != 0) {
printk("KSPD: unable to open sp channel\n");
sp_stopping = 1;
} else {
channel_open++;
printk(KERN_DEBUG "KSPD: SP channel opened\n");
}
} else {
/* wait for some data, allow it to sleep */
rtlx_read_poll(RTLX_CHANNEL_SYSIO, 1);
/* Check we haven't been woken because we are stopping */
if (!sp_stopping)
sp_work_handle_request();
}
if (!sp_stopping)
queue_work(workqueue, &work);
else
sp_cleanup();
}
static void startwork(int vpe)
{
sp_stopping = channel_open = 0;
if (workqueue == NULL) {
if ((workqueue = create_singlethread_workqueue("kspd")) == NULL) {
printk(KERN_ERR "unable to start kspd\n");
return;
}
INIT_WORK(&work, sp_work);
}
queue_work(workqueue, &work);
}
static void stopwork(int vpe)
{
sp_stopping = 1;
printk(KERN_DEBUG "KSPD: SP stopping\n");
}
void kspd_notify(struct kspd_notifications *notify)
{
list_add(&notify->list, &kspd_notifylist);
}
static struct vpe_notifications notify;
static int kspd_module_init(void)
{
INIT_LIST_HEAD(&kspd_notifylist);
notify.start = startwork;
notify.stop = stopwork;
vpe_notify(tclimit, &notify);
return 0;
}
static void kspd_module_exit(void)
{
}
module_init(kspd_module_init);
module_exit(kspd_module_exit);
MODULE_DESCRIPTION("MIPS KSPD");
MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc.");
MODULE_LICENSE("GPL");
arch/mips/kernel/vpe.c
浏览文件 @ 2551aebc
......@@ -50,7 +50,6 @@
#include <asm/mips_mt.h>
#include <asm/processor.h>
#include <asm/vpe.h>
#include <asm/kspd.h>
typedef void *vpe_handle;
......@@ -69,11 +68,6 @@ static char module_name[] = "vpe";
static int major;
static const int minor = 1; /* fixed for now */
#ifdef CONFIG_MIPS_APSP_KSPD
static struct kspd_notifications kspd_events;
static int kspd_events_reqd;
#endif
/* grab the likely amount of memory we will need. */
#ifdef CONFIG_MIPS_VPE_LOADER_TOM
#define P_SIZE (2 * 1024 * 1024)
......@@ -1101,14 +1095,6 @@ static int vpe_open(struct inode *inode, struct file *filp)
v->uid = filp->f_cred->fsuid;
v->gid = filp->f_cred->fsgid;
#ifdef CONFIG_MIPS_APSP_KSPD
/* get kspd to tell us when a syscall_exit happens */
if (!kspd_events_reqd) {
kspd_notify(&kspd_events);
kspd_events_reqd++;
}
#endif
v->cwd[0] = 0;
ret = getcwd(v->cwd, VPE_PATH_MAX);
if (ret < 0)
......@@ -1341,13 +1327,6 @@ char *vpe_getcwd(int index)
EXPORT_SYMBOL(vpe_getcwd);
#ifdef CONFIG_MIPS_APSP_KSPD
static void kspd_sp_exit( int sp_id)
{
cleanup_tc(get_tc(sp_id));
}
#endif
static ssize_t store_kill(struct device *dev, struct device_attribute *attr,
const char *buf, size_t len)
{
......@@ -1585,9 +1564,6 @@ static int __init vpe_module_init(void)
emt(mtflags);
local_irq_restore(flags);
#ifdef CONFIG_MIPS_APSP_KSPD
kspd_events.kspd_sp_exit = kspd_sp_exit;
#endif
return 0;
out_class:
......
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