[MIPS] kpsd and other AP/SP improvements.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
Родитель
bce1a28686
Коммит
2600990e64
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@ -1476,6 +1476,16 @@ config MIPS_VPE_APSP_API
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depends on MIPS_VPE_LOADER
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help
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config MIPS_APSP_KSPD
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bool "Enable KSPD"
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depends on MIPS_VPE_APSP_API
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default y
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help
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KSPD is a kernel daemon that accepts syscall requests from the SP
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side, actions them and returns the results. It also handles the
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"exit" syscall notifying other kernel modules the SP program is
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exiting. You probably want to say yes here.
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config SB1_PASS_1_WORKAROUNDS
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bool
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depends on CPU_SB1_PASS_1
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@ -36,6 +36,7 @@ obj-$(CONFIG_SMP) += smp.o
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obj-$(CONFIG_MIPS_MT_SMP) += smp_mt.o
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obj-$(CONFIG_MIPS_APSP_KSPD) += kspd.o
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obj-$(CONFIG_MIPS_VPE_LOADER) += vpe.o
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obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
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@ -0,0 +1,398 @@
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/*
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* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/unistd.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/syscalls.h>
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#include <linux/workqueue.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <asm/vpe.h>
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#include <asm/rtlx.h>
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#include <asm/kspd.h>
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static struct workqueue_struct *workqueue = NULL;
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static struct work_struct work;
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extern unsigned long cpu_khz;
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struct mtsp_syscall {
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int cmd;
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unsigned char abi;
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unsigned char size;
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};
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struct mtsp_syscall_ret {
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int retval;
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int errno;
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};
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struct mtsp_syscall_generic {
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int arg0;
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int arg1;
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int arg2;
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int arg3;
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int arg4;
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int arg5;
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int arg6;
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};
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static struct list_head kspd_notifylist;
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static int sp_stopping = 0;
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/* these should match with those in the SDE kit */
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#define MTSP_SYSCALL_BASE 0
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#define MTSP_SYSCALL_EXIT (MTSP_SYSCALL_BASE + 0)
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#define MTSP_SYSCALL_OPEN (MTSP_SYSCALL_BASE + 1)
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#define MTSP_SYSCALL_READ (MTSP_SYSCALL_BASE + 2)
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#define MTSP_SYSCALL_WRITE (MTSP_SYSCALL_BASE + 3)
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#define MTSP_SYSCALL_CLOSE (MTSP_SYSCALL_BASE + 4)
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#define MTSP_SYSCALL_LSEEK32 (MTSP_SYSCALL_BASE + 5)
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#define MTSP_SYSCALL_ISATTY (MTSP_SYSCALL_BASE + 6)
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#define MTSP_SYSCALL_GETTIME (MTSP_SYSCALL_BASE + 7)
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#define MTSP_SYSCALL_PIPEFREQ (MTSP_SYSCALL_BASE + 8)
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#define MTSP_SYSCALL_GETTOD (MTSP_SYSCALL_BASE + 9)
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#define MTSP_O_RDONLY 0x0000
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#define MTSP_O_WRONLY 0x0001
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#define MTSP_O_RDWR 0x0002
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#define MTSP_O_NONBLOCK 0x0004
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#define MTSP_O_APPEND 0x0008
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#define MTSP_O_SHLOCK 0x0010
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#define MTSP_O_EXLOCK 0x0020
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#define MTSP_O_ASYNC 0x0040
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#define MTSP_O_FSYNC O_SYNC
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#define MTSP_O_NOFOLLOW 0x0100
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#define MTSP_O_SYNC 0x0080
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#define MTSP_O_CREAT 0x0200
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#define MTSP_O_TRUNC 0x0400
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#define MTSP_O_EXCL 0x0800
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#define MTSP_O_BINARY 0x8000
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#define SP_VPE 1
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struct apsp_table {
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int sp;
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int ap;
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};
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/* we might want to do the mode flags too */
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struct apsp_table open_flags_table[] = {
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{ MTSP_O_RDWR, O_RDWR },
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{ MTSP_O_WRONLY, O_WRONLY },
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{ MTSP_O_CREAT, O_CREAT },
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{ MTSP_O_TRUNC, O_TRUNC },
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{ MTSP_O_NONBLOCK, O_NONBLOCK },
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{ MTSP_O_APPEND, O_APPEND },
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{ MTSP_O_NOFOLLOW, O_NOFOLLOW }
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};
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struct apsp_table syscall_command_table[] = {
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{ MTSP_SYSCALL_OPEN, __NR_open },
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{ MTSP_SYSCALL_CLOSE, __NR_close },
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{ MTSP_SYSCALL_READ, __NR_read },
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{ MTSP_SYSCALL_WRITE, __NR_write },
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{ MTSP_SYSCALL_LSEEK32, __NR_lseek }
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};
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static int sp_syscall(int num, int arg0, int arg1, int arg2, int arg3)
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{
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register long int _num __asm__ ("$2") = num;
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register long int _arg0 __asm__ ("$4") = arg0;
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register long int _arg1 __asm__ ("$5") = arg1;
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register long int _arg2 __asm__ ("$6") = arg2;
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register long int _arg3 __asm__ ("$7") = arg3;
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mm_segment_t old_fs;
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old_fs = get_fs();
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set_fs(KERNEL_DS);
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__asm__ __volatile__ (
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" syscall \n"
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: "=r" (_num), "=r" (_arg3)
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: "r" (_num), "r" (_arg0), "r" (_arg1), "r" (_arg2), "r" (_arg3));
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set_fs(old_fs);
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/* $a3 is error flag */
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if (_arg3)
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return -_num;
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return _num;
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}
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static int translate_syscall_command(int cmd)
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{
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int i;
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int ret = -1;
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for (i = 0; i < ARRAY_SIZE(syscall_command_table); i++) {
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if ((cmd == syscall_command_table[i].sp))
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return syscall_command_table[i].ap;
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}
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return ret;
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}
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static unsigned int translate_open_flags(int flags)
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{
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int i;
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unsigned int ret = 0;
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for (i = 0; i < (sizeof(open_flags_table) / sizeof(struct apsp_table));
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i++) {
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if( (flags & open_flags_table[i].sp) ) {
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ret |= open_flags_table[i].ap;
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}
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}
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return ret;
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}
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static void sp_setfsuidgid( uid_t uid, gid_t gid)
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{
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current->fsuid = uid;
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current->fsgid = gid;
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key_fsuid_changed(current);
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key_fsgid_changed(current);
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}
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/*
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* Expects a request to be on the sysio channel. Reads it. Decides whether
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* its a linux syscall and runs it, or whatever. Puts the return code back
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* into the request and sends the whole thing back.
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*/
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void sp_work_handle_request(void)
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{
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struct mtsp_syscall sc;
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struct mtsp_syscall_generic generic;
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struct mtsp_syscall_ret ret;
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struct kspd_notifications *n;
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struct timeval tv;
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struct timezone tz;
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int cmd;
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char *vcwd;
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mm_segment_t old_fs;
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int size;
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ret.retval = -1;
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if (!rtlx_read(RTLX_CHANNEL_SYSIO, &sc, sizeof(struct mtsp_syscall), 0)) {
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printk(KERN_ERR "Expected request but nothing to read\n");
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return;
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}
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size = sc.size;
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if (size) {
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if (!rtlx_read(RTLX_CHANNEL_SYSIO, &generic, size, 0)) {
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printk(KERN_ERR "Expected request but nothing to read\n");
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return;
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}
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}
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/* Run the syscall at the priviledge of the user who loaded the
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SP program */
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if (vpe_getuid(SP_VPE))
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sp_setfsuidgid( vpe_getuid(SP_VPE), vpe_getgid(SP_VPE));
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switch (sc.cmd) {
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/* needs the flags argument translating from SDE kit to
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linux */
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case MTSP_SYSCALL_PIPEFREQ:
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ret.retval = cpu_khz * 1000;
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ret.errno = 0;
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break;
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case MTSP_SYSCALL_GETTOD:
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memset(&tz, 0, sizeof(tz));
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if ((ret.retval = sp_syscall(__NR_gettimeofday, (int)&tv,
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(int)&tz, 0,0)) == 0)
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ret.retval = tv.tv_sec;
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ret.errno = errno;
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break;
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case MTSP_SYSCALL_EXIT:
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list_for_each_entry(n, &kspd_notifylist, list)
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n->kspd_sp_exit(SP_VPE);
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sp_stopping = 1;
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printk(KERN_DEBUG "KSPD got exit syscall from SP exitcode %d\n",
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generic.arg0);
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break;
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case MTSP_SYSCALL_OPEN:
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generic.arg1 = translate_open_flags(generic.arg1);
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vcwd = vpe_getcwd(SP_VPE);
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/* change to the cwd of the process that loaded the SP program */
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old_fs = get_fs();
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set_fs(KERNEL_DS);
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sys_chdir(vcwd);
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set_fs(old_fs);
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sc.cmd = __NR_open;
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/* fall through */
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default:
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if ((sc.cmd >= __NR_Linux) &&
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(sc.cmd <= (__NR_Linux + __NR_Linux_syscalls)) )
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cmd = sc.cmd;
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else
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cmd = translate_syscall_command(sc.cmd);
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if (cmd >= 0) {
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ret.retval = sp_syscall(cmd, generic.arg0, generic.arg1,
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generic.arg2, generic.arg3);
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ret.errno = errno;
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} else
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printk(KERN_WARNING
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"KSPD: Unknown SP syscall number %d\n", sc.cmd);
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break;
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} /* switch */
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if (vpe_getuid(SP_VPE))
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sp_setfsuidgid( 0, 0);
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if ((rtlx_write(RTLX_CHANNEL_SYSIO, &ret, sizeof(struct mtsp_syscall_ret), 0))
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< sizeof(struct mtsp_syscall_ret))
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printk("KSPD: sp_work_handle_request failed to send to SP\n");
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}
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static void sp_cleanup(void)
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{
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struct files_struct *files = current->files;
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int i, j;
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struct fdtable *fdt;
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j = 0;
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/*
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* It is safe to dereference the fd table without RCU or
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* ->file_lock
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*/
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fdt = files_fdtable(files);
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for (;;) {
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unsigned long set;
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i = j * __NFDBITS;
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if (i >= fdt->max_fdset || i >= fdt->max_fds)
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break;
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set = fdt->open_fds->fds_bits[j++];
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while (set) {
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if (set & 1) {
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struct file * file = xchg(&fdt->fd[i], NULL);
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if (file)
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filp_close(file, files);
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}
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i++;
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set >>= 1;
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}
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}
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}
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static int channel_open = 0;
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/* the work handler */
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static void sp_work(void *data)
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{
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if (!channel_open) {
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if( rtlx_open(RTLX_CHANNEL_SYSIO, 1) != 0) {
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printk("KSPD: unable to open sp channel\n");
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sp_stopping = 1;
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} else {
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channel_open++;
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printk(KERN_DEBUG "KSPD: SP channel opened\n");
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}
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} else {
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/* wait for some data, allow it to sleep */
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rtlx_read_poll(RTLX_CHANNEL_SYSIO, 1);
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/* Check we haven't been woken because we are stopping */
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if (!sp_stopping)
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sp_work_handle_request();
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}
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if (!sp_stopping)
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queue_work(workqueue, &work);
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else
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sp_cleanup();
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}
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static void startwork(int vpe)
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{
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sp_stopping = channel_open = 0;
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if (workqueue == NULL) {
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if ((workqueue = create_singlethread_workqueue("kspd")) == NULL) {
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printk(KERN_ERR "unable to start kspd\n");
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return;
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}
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INIT_WORK(&work, sp_work, NULL);
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queue_work(workqueue, &work);
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} else
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queue_work(workqueue, &work);
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}
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static void stopwork(int vpe)
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{
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sp_stopping = 1;
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printk(KERN_DEBUG "KSPD: SP stopping\n");
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}
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void kspd_notify(struct kspd_notifications *notify)
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{
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list_add(¬ify->list, &kspd_notifylist);
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}
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static struct vpe_notifications notify;
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static int kspd_module_init(void)
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{
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INIT_LIST_HEAD(&kspd_notifylist);
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notify.start = startwork;
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notify.stop = stopwork;
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vpe_notify(SP_VPE, ¬ify);
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return 0;
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}
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static void kspd_module_exit(void)
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{
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}
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module_init(kspd_module_init);
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module_exit(kspd_module_exit);
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MODULE_DESCRIPTION("MIPS KSPD");
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MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc.");
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MODULE_LICENSE("GPL");
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@ -21,45 +21,44 @@
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <asm/uaccess.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/vmalloc.h>
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#include <linux/elf.h>
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#include <linux/seq_file.h>
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#include <linux/syscalls.h>
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#include <linux/moduleloader.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/poll.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <asm/mipsmtregs.h>
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#include <asm/bitops.h>
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#include <asm/cacheflush.h>
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#include <asm/atomic.h>
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#include <asm/cpu.h>
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#include <asm/processor.h>
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#include <asm/system.h>
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#include <asm/vpe.h>
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#include <asm/rtlx.h>
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#include <asm/uaccess.h>
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#define RTLX_TARG_VPE 1
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static struct rtlx_info *rtlx;
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static int major;
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static char module_name[] = "rtlx";
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static struct irqaction irq;
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static int irq_num;
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static inline int spacefree(int read, int write, int size)
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{
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if (read == write) {
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/*
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* never fill the buffer completely, so indexes are always
|
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* equal if empty and only empty, or !equal if data available
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*/
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return size - 1;
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}
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return ((read + size - write) % size) - 1;
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}
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static struct chan_waitqueues {
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wait_queue_head_t rt_queue;
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wait_queue_head_t lx_queue;
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int in_open;
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} channel_wqs[RTLX_CHANNELS];
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static struct irqaction irq;
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static int irq_num;
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static struct vpe_notifications notify;
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static int sp_stopping = 0;
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|
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extern void *vpe_get_shared(int index);
|
||||
|
||||
static void rtlx_dispatch(struct pt_regs *regs)
|
||||
|
|
@ -67,174 +66,298 @@ static void rtlx_dispatch(struct pt_regs *regs)
|
|||
do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ, regs);
|
||||
}
|
||||
|
||||
|
||||
/* Interrupt handler may be called before rtlx_init has otherwise had
|
||||
a chance to run.
|
||||
*/
|
||||
static irqreturn_t rtlx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < RTLX_CHANNELS; i++) {
|
||||
struct rtlx_channel *chan = &rtlx->channel[i];
|
||||
|
||||
if (chan->lx_read != chan->lx_write)
|
||||
wake_up_interruptible(&channel_wqs[i].lx_queue);
|
||||
wake_up(&channel_wqs[i].lx_queue);
|
||||
wake_up(&channel_wqs[i].rt_queue);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* call when we have the address of the shared structure from the SP side. */
|
||||
static int rtlx_init(struct rtlx_info *rtlxi)
|
||||
static __attribute_used__ void dump_rtlx(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
printk("id 0x%lx state %d\n", rtlx->id, rtlx->state);
|
||||
|
||||
for (i = 0; i < RTLX_CHANNELS; i++) {
|
||||
struct rtlx_channel *chan = &rtlx->channel[i];
|
||||
|
||||
printk(" rt_state %d lx_state %d buffer_size %d\n",
|
||||
chan->rt_state, chan->lx_state, chan->buffer_size);
|
||||
|
||||
printk(" rt_read %d rt_write %d\n",
|
||||
chan->rt_read, chan->rt_write);
|
||||
|
||||
printk(" lx_read %d lx_write %d\n",
|
||||
chan->lx_read, chan->lx_write);
|
||||
|
||||
printk(" rt_buffer <%s>\n", chan->rt_buffer);
|
||||
printk(" lx_buffer <%s>\n", chan->lx_buffer);
|
||||
}
|
||||
}
|
||||
|
||||
/* call when we have the address of the shared structure from the SP side. */
|
||||
static int rtlx_init(struct rtlx_info *rtlxi)
|
||||
{
|
||||
if (rtlxi->id != RTLX_ID) {
|
||||
printk(KERN_WARNING "no valid RTLX id at 0x%p\n", rtlxi);
|
||||
printk(KERN_ERR "no valid RTLX id at 0x%p 0x%x\n", rtlxi, rtlxi->id);
|
||||
return -ENOEXEC;
|
||||
}
|
||||
|
||||
/* initialise the wait queues */
|
||||
for (i = 0; i < RTLX_CHANNELS; i++) {
|
||||
init_waitqueue_head(&channel_wqs[i].rt_queue);
|
||||
init_waitqueue_head(&channel_wqs[i].lx_queue);
|
||||
}
|
||||
|
||||
/* set up for interrupt handling */
|
||||
memset(&irq, 0, sizeof(struct irqaction));
|
||||
|
||||
if (cpu_has_vint)
|
||||
set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
|
||||
|
||||
irq_num = MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ;
|
||||
irq.handler = rtlx_interrupt;
|
||||
irq.flags = SA_INTERRUPT;
|
||||
irq.name = "RTLX";
|
||||
irq.dev_id = rtlx;
|
||||
setup_irq(irq_num, &irq);
|
||||
|
||||
rtlx = rtlxi;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* only allow one open process at a time to open each channel */
|
||||
static int rtlx_open(struct inode *inode, struct file *filp)
|
||||
/* notifications */
|
||||
static void starting(int vpe)
|
||||
{
|
||||
int minor, ret;
|
||||
struct rtlx_channel *chan;
|
||||
int i;
|
||||
sp_stopping = 0;
|
||||
|
||||
/* assume only 1 device at the mo. */
|
||||
minor = MINOR(inode->i_rdev);
|
||||
/* force a reload of rtlx */
|
||||
rtlx=NULL;
|
||||
|
||||
/* wake up any sleeping rtlx_open's */
|
||||
for (i = 0; i < RTLX_CHANNELS; i++)
|
||||
wake_up_interruptible(&channel_wqs[i].lx_queue);
|
||||
}
|
||||
|
||||
static void stopping(int vpe)
|
||||
{
|
||||
int i;
|
||||
|
||||
sp_stopping = 1;
|
||||
for (i = 0; i < RTLX_CHANNELS; i++)
|
||||
wake_up_interruptible(&channel_wqs[i].lx_queue);
|
||||
}
|
||||
|
||||
|
||||
int rtlx_open(int index, int can_sleep)
|
||||
{
|
||||
int ret;
|
||||
struct rtlx_channel *chan;
|
||||
volatile struct rtlx_info **p;
|
||||
|
||||
if (index >= RTLX_CHANNELS) {
|
||||
printk(KERN_DEBUG "rtlx_open index out of range\n");
|
||||
return -ENOSYS;
|
||||
}
|
||||
|
||||
if (channel_wqs[index].in_open) {
|
||||
printk(KERN_DEBUG "rtlx_open channel %d already opened\n", index);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
channel_wqs[index].in_open++;
|
||||
|
||||
if (rtlx == NULL) {
|
||||
struct rtlx_info **p;
|
||||
if( (p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
|
||||
printk(KERN_ERR "vpe_get_shared is NULL. "
|
||||
"Has an SP program been loaded?\n");
|
||||
return -EFAULT;
|
||||
if (can_sleep) {
|
||||
DECLARE_WAITQUEUE(wait, current);
|
||||
|
||||
/* go to sleep */
|
||||
add_wait_queue(&channel_wqs[index].lx_queue, &wait);
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
while ((p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
|
||||
schedule();
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
}
|
||||
|
||||
set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
|
||||
|
||||
/* back running */
|
||||
} else {
|
||||
printk( KERN_DEBUG "No SP program loaded, and device "
|
||||
"opened with O_NONBLOCK\n");
|
||||
channel_wqs[index].in_open = 0;
|
||||
return -ENOSYS;
|
||||
}
|
||||
}
|
||||
|
||||
if (*p == NULL) {
|
||||
printk(KERN_ERR "vpe_shared %p %p\n", p, *p);
|
||||
return -EFAULT;
|
||||
if (can_sleep) {
|
||||
DECLARE_WAITQUEUE(wait, current);
|
||||
|
||||
/* go to sleep */
|
||||
add_wait_queue(&channel_wqs[index].lx_queue, &wait);
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
while (*p == NULL) {
|
||||
schedule();
|
||||
|
||||
/* reset task state to interruptable otherwise
|
||||
we'll whizz round here like a very fast loopy
|
||||
thing. schedule() appears to return with state
|
||||
set to TASK_RUNNING.
|
||||
|
||||
If the loaded SP program, for whatever reason,
|
||||
doesn't set up the shared structure *p will never
|
||||
become true. So whoever connected to either /dev/rt?
|
||||
or if it was kspd, will then take up rather a lot of
|
||||
processor cycles.
|
||||
*/
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
}
|
||||
|
||||
set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
|
||||
|
||||
/* back running */
|
||||
}
|
||||
else {
|
||||
printk(" *vpe_get_shared is NULL. "
|
||||
"Has an SP program been loaded?\n");
|
||||
channel_wqs[index].in_open = 0;
|
||||
return -ENOSYS;
|
||||
}
|
||||
}
|
||||
|
||||
if ((ret = rtlx_init(*p)) < 0)
|
||||
return ret;
|
||||
if ((unsigned int)*p < KSEG0) {
|
||||
printk(KERN_WARNING "vpe_get_shared returned an invalid pointer "
|
||||
"maybe an error code %d\n", (int)*p);
|
||||
channel_wqs[index].in_open = 0;
|
||||
return -ENOSYS;
|
||||
}
|
||||
|
||||
if ((ret = rtlx_init(*p)) < 0) {
|
||||
channel_wqs[index].in_open = 0;
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
chan = &rtlx->channel[minor];
|
||||
chan = &rtlx->channel[index];
|
||||
|
||||
if (test_and_set_bit(RTLX_STATE_OPENED, &chan->lx_state))
|
||||
return -EBUSY;
|
||||
if (chan->lx_state == RTLX_STATE_OPENED) {
|
||||
channel_wqs[index].in_open = 0;
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
chan->lx_state = RTLX_STATE_OPENED;
|
||||
channel_wqs[index].in_open = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rtlx_release(struct inode *inode, struct file *filp)
|
||||
int rtlx_release(int index)
|
||||
{
|
||||
int minor = MINOR(inode->i_rdev);
|
||||
|
||||
clear_bit(RTLX_STATE_OPENED, &rtlx->channel[minor].lx_state);
|
||||
smp_mb__after_clear_bit();
|
||||
|
||||
rtlx->channel[index].lx_state = RTLX_STATE_UNUSED;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned int rtlx_poll(struct file *file, poll_table * wait)
|
||||
unsigned int rtlx_read_poll(int index, int can_sleep)
|
||||
{
|
||||
int minor;
|
||||
unsigned int mask = 0;
|
||||
struct rtlx_channel *chan;
|
||||
struct rtlx_channel *chan;
|
||||
|
||||
minor = MINOR(file->f_dentry->d_inode->i_rdev);
|
||||
chan = &rtlx->channel[minor];
|
||||
if (rtlx == NULL)
|
||||
return 0;
|
||||
|
||||
poll_wait(file, &channel_wqs[minor].rt_queue, wait);
|
||||
poll_wait(file, &channel_wqs[minor].lx_queue, wait);
|
||||
chan = &rtlx->channel[index];
|
||||
|
||||
/* data available to read? */
|
||||
if (chan->lx_read != chan->lx_write)
|
||||
mask |= POLLIN | POLLRDNORM;
|
||||
if (chan->lx_read == chan->lx_write) {
|
||||
if (can_sleep) {
|
||||
DECLARE_WAITQUEUE(wait, current);
|
||||
|
||||
/* space to write */
|
||||
if (spacefree(chan->rt_read, chan->rt_write, chan->buffer_size))
|
||||
mask |= POLLOUT | POLLWRNORM;
|
||||
/* go to sleep */
|
||||
add_wait_queue(&channel_wqs[index].lx_queue, &wait);
|
||||
|
||||
return mask;
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
while (chan->lx_read == chan->lx_write) {
|
||||
schedule();
|
||||
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
|
||||
if (sp_stopping) {
|
||||
set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&channel_wqs[index].lx_queue, &wait);
|
||||
|
||||
/* back running */
|
||||
}
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
return (chan->lx_write + chan->buffer_size - chan->lx_read)
|
||||
% chan->buffer_size;
|
||||
}
|
||||
|
||||
static ssize_t rtlx_read(struct file *file, char __user * buffer, size_t count,
|
||||
loff_t * ppos)
|
||||
static inline int write_spacefree(int read, int write, int size)
|
||||
{
|
||||
unsigned long failed;
|
||||
size_t fl = 0L;
|
||||
int minor;
|
||||
struct rtlx_channel *lx;
|
||||
DECLARE_WAITQUEUE(wait, current);
|
||||
|
||||
minor = MINOR(file->f_dentry->d_inode->i_rdev);
|
||||
lx = &rtlx->channel[minor];
|
||||
|
||||
/* data available? */
|
||||
if (lx->lx_write == lx->lx_read) {
|
||||
if (file->f_flags & O_NONBLOCK)
|
||||
return 0; /* -EAGAIN makes cat whinge */
|
||||
|
||||
/* go to sleep */
|
||||
add_wait_queue(&channel_wqs[minor].lx_queue, &wait);
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
|
||||
while (lx->lx_write == lx->lx_read)
|
||||
schedule();
|
||||
|
||||
set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&channel_wqs[minor].lx_queue, &wait);
|
||||
|
||||
/* back running */
|
||||
if (read == write) {
|
||||
/*
|
||||
* Never fill the buffer completely, so indexes are always
|
||||
* equal if empty and only empty, or !equal if data available
|
||||
*/
|
||||
return size - 1;
|
||||
}
|
||||
|
||||
return ((read + size - write) % size) - 1;
|
||||
}
|
||||
|
||||
unsigned int rtlx_write_poll(int index)
|
||||
{
|
||||
struct rtlx_channel *chan = &rtlx->channel[index];
|
||||
return write_spacefree(chan->rt_read, chan->rt_write, chan->buffer_size);
|
||||
}
|
||||
|
||||
static inline void copy_to(void *dst, void *src, size_t count, int user)
|
||||
{
|
||||
if (user)
|
||||
copy_to_user(dst, src, count);
|
||||
else
|
||||
memcpy(dst, src, count);
|
||||
}
|
||||
|
||||
static inline void copy_from(void *dst, void *src, size_t count, int user)
|
||||
{
|
||||
if (user)
|
||||
copy_from_user(dst, src, count);
|
||||
else
|
||||
memcpy(dst, src, count);
|
||||
}
|
||||
|
||||
ssize_t rtlx_read(int index, void *buff, size_t count, int user)
|
||||
{
|
||||
size_t fl = 0L;
|
||||
struct rtlx_channel *lx;
|
||||
|
||||
if (rtlx == NULL)
|
||||
return -ENOSYS;
|
||||
|
||||
lx = &rtlx->channel[index];
|
||||
|
||||
/* find out how much in total */
|
||||
count = min(count,
|
||||
(size_t)(lx->lx_write + lx->buffer_size - lx->lx_read) % lx->buffer_size);
|
||||
(size_t)(lx->lx_write + lx->buffer_size - lx->lx_read)
|
||||
% lx->buffer_size);
|
||||
|
||||
/* then how much from the read pointer onwards */
|
||||
fl = min(count, (size_t)lx->buffer_size - lx->lx_read);
|
||||
fl = min( count, (size_t)lx->buffer_size - lx->lx_read);
|
||||
|
||||
failed = copy_to_user (buffer, &lx->lx_buffer[lx->lx_read], fl);
|
||||
if (failed) {
|
||||
count = fl - failed;
|
||||
goto out;
|
||||
}
|
||||
copy_to(buff, &lx->lx_buffer[lx->lx_read], fl, user);
|
||||
|
||||
/* and if there is anything left at the beginning of the buffer */
|
||||
if (count - fl) {
|
||||
failed = copy_to_user (buffer + fl, lx->lx_buffer, count - fl);
|
||||
if (failed) {
|
||||
count -= failed;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
if ( count - fl )
|
||||
copy_to (buff + fl, lx->lx_buffer, count - fl, user);
|
||||
|
||||
out:
|
||||
/* update the index */
|
||||
lx->lx_read += count;
|
||||
lx->lx_read %= lx->buffer_size;
|
||||
|
|
@ -242,20 +365,101 @@ out:
|
|||
return count;
|
||||
}
|
||||
|
||||
static ssize_t rtlx_write(struct file *file, const char __user * buffer,
|
||||
size_t count, loff_t * ppos)
|
||||
ssize_t rtlx_write(int index, void *buffer, size_t count, int user)
|
||||
{
|
||||
unsigned long failed;
|
||||
int minor;
|
||||
struct rtlx_channel *rt;
|
||||
size_t fl;
|
||||
|
||||
if (rtlx == NULL)
|
||||
return(-ENOSYS);
|
||||
|
||||
rt = &rtlx->channel[index];
|
||||
|
||||
/* total number of bytes to copy */
|
||||
count = min(count,
|
||||
(size_t)write_spacefree(rt->rt_read, rt->rt_write,
|
||||
rt->buffer_size));
|
||||
|
||||
/* first bit from write pointer to the end of the buffer, or count */
|
||||
fl = min(count, (size_t) rt->buffer_size - rt->rt_write);
|
||||
|
||||
copy_from (&rt->rt_buffer[rt->rt_write], buffer, fl, user);
|
||||
|
||||
/* if there's any left copy to the beginning of the buffer */
|
||||
if( count - fl )
|
||||
copy_from (rt->rt_buffer, buffer + fl, count - fl, user);
|
||||
|
||||
rt->rt_write += count;
|
||||
rt->rt_write %= rt->buffer_size;
|
||||
|
||||
return(count);
|
||||
}
|
||||
|
||||
|
||||
static int file_open(struct inode *inode, struct file *filp)
|
||||
{
|
||||
int minor = MINOR(inode->i_rdev);
|
||||
|
||||
return rtlx_open(minor, (filp->f_flags & O_NONBLOCK) ? 0 : 1);
|
||||
}
|
||||
|
||||
static int file_release(struct inode *inode, struct file *filp)
|
||||
{
|
||||
int minor;
|
||||
minor = MINOR(inode->i_rdev);
|
||||
|
||||
return rtlx_release(minor);
|
||||
}
|
||||
|
||||
static unsigned int file_poll(struct file *file, poll_table * wait)
|
||||
{
|
||||
int minor;
|
||||
unsigned int mask = 0;
|
||||
|
||||
minor = MINOR(file->f_dentry->d_inode->i_rdev);
|
||||
|
||||
poll_wait(file, &channel_wqs[minor].rt_queue, wait);
|
||||
poll_wait(file, &channel_wqs[minor].lx_queue, wait);
|
||||
|
||||
if (rtlx == NULL)
|
||||
return 0;
|
||||
|
||||
/* data available to read? */
|
||||
if (rtlx_read_poll(minor, 0))
|
||||
mask |= POLLIN | POLLRDNORM;
|
||||
|
||||
/* space to write */
|
||||
if (rtlx_write_poll(minor))
|
||||
mask |= POLLOUT | POLLWRNORM;
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
static ssize_t file_read(struct file *file, char __user * buffer, size_t count,
|
||||
loff_t * ppos)
|
||||
{
|
||||
int minor = MINOR(file->f_dentry->d_inode->i_rdev);
|
||||
|
||||
/* data available? */
|
||||
if (!rtlx_read_poll(minor, (file->f_flags & O_NONBLOCK) ? 0 : 1)) {
|
||||
return 0; // -EAGAIN makes cat whinge
|
||||
}
|
||||
|
||||
return rtlx_read(minor, buffer, count, 1);
|
||||
}
|
||||
|
||||
static ssize_t file_write(struct file *file, const char __user * buffer,
|
||||
size_t count, loff_t * ppos)
|
||||
{
|
||||
int minor;
|
||||
struct rtlx_channel *rt;
|
||||
DECLARE_WAITQUEUE(wait, current);
|
||||
|
||||
minor = MINOR(file->f_dentry->d_inode->i_rdev);
|
||||
rt = &rtlx->channel[minor];
|
||||
|
||||
/* any space left... */
|
||||
if (!spacefree(rt->rt_read, rt->rt_write, rt->buffer_size)) {
|
||||
if (!rtlx_write_poll(minor)) {
|
||||
|
||||
if (file->f_flags & O_NONBLOCK)
|
||||
return -EAGAIN;
|
||||
|
|
@ -263,61 +467,64 @@ static ssize_t rtlx_write(struct file *file, const char __user * buffer,
|
|||
add_wait_queue(&channel_wqs[minor].rt_queue, &wait);
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
|
||||
while (!spacefree(rt->rt_read, rt->rt_write, rt->buffer_size))
|
||||
while (!rtlx_write_poll(minor))
|
||||
schedule();
|
||||
|
||||
set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&channel_wqs[minor].rt_queue, &wait);
|
||||
}
|
||||
|
||||
/* total number of bytes to copy */
|
||||
count = min(count, (size_t)spacefree(rt->rt_read, rt->rt_write, rt->buffer_size) );
|
||||
|
||||
/* first bit from write pointer to the end of the buffer, or count */
|
||||
fl = min(count, (size_t) rt->buffer_size - rt->rt_write);
|
||||
|
||||
failed = copy_from_user(&rt->rt_buffer[rt->rt_write], buffer, fl);
|
||||
if (failed) {
|
||||
count = fl - failed;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* if there's any left copy to the beginning of the buffer */
|
||||
if (count - fl) {
|
||||
failed = copy_from_user(rt->rt_buffer, buffer + fl, count - fl);
|
||||
if (failed) {
|
||||
count -= failed;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
rt->rt_write += count;
|
||||
rt->rt_write %= rt->buffer_size;
|
||||
|
||||
return count;
|
||||
return rtlx_write(minor, (void *)buffer, count, 1);
|
||||
}
|
||||
|
||||
static struct file_operations rtlx_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = rtlx_open,
|
||||
.release = rtlx_release,
|
||||
.write = rtlx_write,
|
||||
.read = rtlx_read,
|
||||
.poll = rtlx_poll
|
||||
.owner = THIS_MODULE,
|
||||
.open = file_open,
|
||||
.release = file_release,
|
||||
.write = file_write,
|
||||
.read = file_read,
|
||||
.poll = file_poll
|
||||
};
|
||||
|
||||
static struct irqaction rtlx_irq = {
|
||||
.handler = rtlx_interrupt,
|
||||
.flags = SA_INTERRUPT,
|
||||
.name = "RTLX",
|
||||
};
|
||||
|
||||
static int rtlx_irq_num = MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ;
|
||||
|
||||
static char register_chrdev_failed[] __initdata =
|
||||
KERN_ERR "rtlx_module_init: unable to register device\n";
|
||||
|
||||
static int __init rtlx_module_init(void)
|
||||
static int rtlx_module_init(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
major = register_chrdev(0, module_name, &rtlx_fops);
|
||||
if (major < 0) {
|
||||
printk(register_chrdev_failed);
|
||||
return major;
|
||||
}
|
||||
|
||||
/* initialise the wait queues */
|
||||
for (i = 0; i < RTLX_CHANNELS; i++) {
|
||||
init_waitqueue_head(&channel_wqs[i].rt_queue);
|
||||
init_waitqueue_head(&channel_wqs[i].lx_queue);
|
||||
channel_wqs[i].in_open = 0;
|
||||
}
|
||||
|
||||
/* set up notifiers */
|
||||
notify.start = starting;
|
||||
notify.stop = stopping;
|
||||
vpe_notify(RTLX_TARG_VPE, ¬ify);
|
||||
|
||||
if (cpu_has_vint)
|
||||
set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
|
||||
|
||||
rtlx_irq.dev_id = rtlx;
|
||||
setup_irq(rtlx_irq_num, &rtlx_irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -330,5 +537,5 @@ module_init(rtlx_module_init);
|
|||
module_exit(rtlx_module_exit);
|
||||
|
||||
MODULE_DESCRIPTION("MIPS RTLX");
|
||||
MODULE_AUTHOR("Elizabeth Clarke, MIPS Technologies, Inc.");
|
||||
MODULE_AUTHOR("Elizabeth Oldham, MIPS Technologies, Inc.");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
|
|||
Разница между файлами не показана из-за своего большого размера
Загрузить разницу
|
|
@ -0,0 +1,36 @@
|
|||
/*
|
||||
* 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.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _ASM_KSPD_H
|
||||
#define _ASM_KSPD_H
|
||||
|
||||
struct kspd_notifications {
|
||||
void (*kspd_sp_exit)(int sp_id);
|
||||
|
||||
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
|
||||
|
|
@ -234,7 +234,7 @@ static inline void __raw_emt(void)
|
|||
__asm__ __volatile__(
|
||||
" .set noreorder \n"
|
||||
" .set mips32r2 \n"
|
||||
" emt \n"
|
||||
" .word 0x41600be1 # emt \n"
|
||||
" ehb \n"
|
||||
" .set mips0 \n"
|
||||
" .set reorder");
|
||||
|
|
@ -364,6 +364,9 @@ do { \
|
|||
#define read_vpe_c0_ebase() mftc0(15,1)
|
||||
#define write_vpe_c0_ebase(val) mttc0(15, 1, val)
|
||||
#define write_vpe_c0_compare(val) mttc0(11, 0, val)
|
||||
#define read_vpe_c0_badvaddr() mftc0(8, 0)
|
||||
#define read_vpe_c0_epc() mftc0(14, 0)
|
||||
#define write_vpe_c0_epc(val) mttc0(14, 0, val)
|
||||
|
||||
|
||||
/* TC */
|
||||
|
|
|
|||
|
|
@ -3,32 +3,46 @@
|
|||
*
|
||||
*/
|
||||
|
||||
#ifndef _RTLX_H
|
||||
#define _RTLX_H_
|
||||
#ifndef __ASM_RTLX_H
|
||||
#define __ASM_RTLX_H_
|
||||
|
||||
#define LX_NODE_BASE 10
|
||||
|
||||
#define MIPSCPU_INT_BASE 16
|
||||
#define MIPS_CPU_RTLX_IRQ 0
|
||||
|
||||
#define RTLX_VERSION 1
|
||||
#define RTLX_VERSION 2
|
||||
#define RTLX_xID 0x12345600
|
||||
#define RTLX_ID (RTLX_xID | RTLX_VERSION)
|
||||
#define RTLX_CHANNELS 8
|
||||
|
||||
#define RTLX_BUFFER_SIZE 1024
|
||||
#define RTLX_CHANNEL_STDIO 0
|
||||
#define RTLX_CHANNEL_DBG 1
|
||||
#define RTLX_CHANNEL_SYSIO 2
|
||||
|
||||
/*
|
||||
* lx_state bits
|
||||
*/
|
||||
#define RTLX_STATE_OPENED 1UL
|
||||
extern int rtlx_open(int index, int can_sleep);
|
||||
extern int rtlx_release(int index);
|
||||
extern ssize_t rtlx_read(int index, void *buff, size_t count, int user);
|
||||
extern ssize_t rtlx_write(int index, void *buffer, size_t count, int user);
|
||||
extern unsigned int rtlx_read_poll(int index, int can_sleep);
|
||||
extern unsigned int rtlx_write_poll(int index);
|
||||
|
||||
enum rtlx_state {
|
||||
RTLX_STATE_UNUSED,
|
||||
RTLX_STATE_INITIALISED,
|
||||
RTLX_STATE_REMOTE_READY,
|
||||
RTLX_STATE_OPENED
|
||||
};
|
||||
|
||||
#define RTLX_BUFFER_SIZE 1024
|
||||
|
||||
/* each channel supports read and write.
|
||||
linux (vpe0) reads lx_buffer and writes rt_buffer
|
||||
SP (vpe1) reads rt_buffer and writes lx_buffer
|
||||
*/
|
||||
struct rtlx_channel {
|
||||
unsigned long lx_state;
|
||||
enum rtlx_state rt_state;
|
||||
enum rtlx_state lx_state;
|
||||
|
||||
int buffer_size;
|
||||
|
||||
|
|
@ -38,15 +52,13 @@ struct rtlx_channel {
|
|||
|
||||
int lx_write, lx_read;
|
||||
char *lx_buffer;
|
||||
|
||||
void *queues;
|
||||
|
||||
};
|
||||
|
||||
struct rtlx_info {
|
||||
unsigned long id;
|
||||
enum rtlx_state state;
|
||||
|
||||
struct rtlx_channel channel[RTLX_CHANNELS];
|
||||
};
|
||||
|
||||
#endif /* _RTLX_H_ */
|
||||
#endif /* __ASM_RTLX_H_ */
|
||||
|
|
|
|||
|
|
@ -0,0 +1,37 @@
|
|||
/*
|
||||
* 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.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _ASM_VPE_H
|
||||
#define _ASM_VPE_H
|
||||
|
||||
struct vpe_notifications {
|
||||
void (*start)(int vpe);
|
||||
void (*stop)(int vpe);
|
||||
|
||||
struct list_head list;
|
||||
};
|
||||
|
||||
|
||||
extern int vpe_notify(int index, struct vpe_notifications *notify);
|
||||
|
||||
extern void *vpe_get_shared(int index);
|
||||
extern int vpe_getuid(int index);
|
||||
extern int vpe_getgid(int index);
|
||||
extern char *vpe_getcwd(int index);
|
||||
|
||||
#endif /* _ASM_VPE_H */
|
||||
Загрузка…
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