Commit 2c973ef0 authored by Deng-Cheng Zhu's avatar Deng-Cheng Zhu Committed by Ralf Baechle

MIPS: APRP: Split RTLX support into separate files.

Split the RTLX functionality in preparation for adding support for CMP
platforms. Common functions remain in the original file and a new file
contains code specific to platforms that do not have a CMP.
Signed-off-by: default avatarDeng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Signed-off-by: default avatarSteven J. Hill <Steven.Hill@imgtec.com>
Reviewed-by: default avatarQais Yousef <Qais.Yousef@imgtec.com>
Patchwork: http://patchwork.linux-mips.org/patch/6093/Reviewed-by: default avatarJohn Crispin <blogic@openwrt.org>
parent 17a1d523
......@@ -1956,6 +1956,11 @@ config MIPS_VPE_APSP_API
depends on MIPS_VPE_LOADER
help
config MIPS_VPE_APSP_API_MT
bool
default "y"
depends on MIPS_VPE_APSP_API && !MIPS_CMP
config MIPS_CMP
bool "MIPS CMP support"
depends on SYS_SUPPORTS_MIPS_CMP && MIPS_MT_SMP
......
/*
* Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved.
*
* Copyright (C) 2013 Imagination Technologies Ltd.
*/
#ifndef __ASM_RTLX_H_
......@@ -8,6 +8,8 @@
#include <irq.h>
#define RTLX_MODULE_NAME "rtlx"
#define LX_NODE_BASE 10
#define MIPS_CPU_RTLX_IRQ 0
......@@ -15,18 +17,31 @@
#define RTLX_VERSION 2
#define RTLX_xID 0x12345600
#define RTLX_ID (RTLX_xID | RTLX_VERSION)
#define RTLX_BUFFER_SIZE 2048
#define RTLX_CHANNELS 8
#define RTLX_CHANNEL_STDIO 0
#define RTLX_CHANNEL_DBG 1
#define RTLX_CHANNEL_SYSIO 2
extern int rtlx_open(int index, int can_sleep);
extern int rtlx_release(int index);
extern ssize_t rtlx_read(int index, void __user *buff, size_t count);
extern ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
extern unsigned int rtlx_read_poll(int index, int can_sleep);
extern unsigned int rtlx_write_poll(int index);
void rtlx_starting(int vpe);
void rtlx_stopping(int vpe);
int rtlx_open(int index, int can_sleep);
int rtlx_release(int index);
ssize_t rtlx_read(int index, void __user *buff, size_t count);
ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
unsigned int rtlx_read_poll(int index, int can_sleep);
unsigned int rtlx_write_poll(int index);
int __init rtlx_module_init(void);
void __exit rtlx_module_exit(void);
void _interrupt_sp(void);
extern struct vpe_notifications rtlx_notify;
extern const struct file_operations rtlx_fops;
extern void (*aprp_hook)(void);
enum rtlx_state {
RTLX_STATE_UNUSED = 0,
......@@ -35,10 +50,15 @@ enum rtlx_state {
RTLX_STATE_OPENED
};
#define RTLX_BUFFER_SIZE 2048
extern struct chan_waitqueues {
wait_queue_head_t rt_queue;
wait_queue_head_t lx_queue;
atomic_t in_open;
struct mutex mutex;
} channel_wqs[RTLX_CHANNELS];
/* each channel supports read and write.
linux (vpe0) reads lx_buffer and writes rt_buffer
linux (vpe0) reads lx_buffer and writes rt_buffer
SP (vpe1) reads rt_buffer and writes lx_buffer
*/
struct rtlx_channel {
......@@ -55,11 +75,10 @@ struct rtlx_channel {
char *lx_buffer;
};
struct rtlx_info {
extern struct rtlx_info {
unsigned long id;
enum rtlx_state state;
struct rtlx_channel channel[RTLX_CHANNELS];
};
} *rtlx;
#endif /* __ASM_RTLX_H_ */
......@@ -59,6 +59,7 @@ obj-$(CONFIG_MIPS_VPE_LOADER) += vpe.o
obj-$(CONFIG_MIPS_VPE_LOADER_CMP) += vpe-cmp.o
obj-$(CONFIG_MIPS_VPE_LOADER_MT) += vpe-mt.o
obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
obj-$(CONFIG_MIPS_VPE_APSP_API_MT) += rtlx-mt.o
obj-$(CONFIG_I8259) += i8259.o
obj-$(CONFIG_IRQ_CPU) += irq_cpu.o
......
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
* Copyright (C) 2013 Imagination Technologies Ltd.
*/
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/err.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/mips_mt.h>
#include <asm/vpe.h>
#include <asm/rtlx.h>
static int major;
static void rtlx_dispatch(void)
{
if (read_c0_cause() & read_c0_status() & C_SW0)
do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ);
}
/*
* 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)
{
unsigned int vpeflags;
unsigned long flags;
int i;
/* Ought not to be strictly necessary for SMTC builds */
local_irq_save(flags);
vpeflags = dvpe();
set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ);
irq_enable_hazard();
evpe(vpeflags);
local_irq_restore(flags);
for (i = 0; i < RTLX_CHANNELS; i++) {
wake_up(&channel_wqs[i].lx_queue);
wake_up(&channel_wqs[i].rt_queue);
}
return IRQ_HANDLED;
}
static struct irqaction rtlx_irq = {
.handler = rtlx_interrupt,
.name = "RTLX",
};
static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ;
void _interrupt_sp(void)
{
unsigned long flags;
local_irq_save(flags);
dvpe();
settc(1);
write_vpe_c0_cause(read_vpe_c0_cause() | C_SW0);
evpe(EVPE_ENABLE);
local_irq_restore(flags);
}
int __init rtlx_module_init(void)
{
struct device *dev;
int i, err;
if (!cpu_has_mipsmt) {
pr_warn("VPE loader: not a MIPS MT capable processor\n");
return -ENODEV;
}
if (aprp_cpu_index() == 0) {
pr_warn("No TCs reserved for AP/SP, not initializing RTLX.\n"
"Pass maxtcs=<n> argument as kernel argument\n");
return -ENODEV;
}
major = register_chrdev(0, RTLX_MODULE_NAME, &rtlx_fops);
if (major < 0) {
pr_err("rtlx_module_init: unable to register device\n");
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);
atomic_set(&channel_wqs[i].in_open, 0);
mutex_init(&channel_wqs[i].mutex);
dev = device_create(mt_class, NULL, MKDEV(major, i), NULL,
"%s%d", RTLX_MODULE_NAME, i);
if (IS_ERR(dev)) {
err = PTR_ERR(dev);
goto out_chrdev;
}
}
/* set up notifiers */
rtlx_notify.start = rtlx_starting;
rtlx_notify.stop = rtlx_stopping;
vpe_notify(aprp_cpu_index(), &rtlx_notify);
if (cpu_has_vint) {
aprp_hook = rtlx_dispatch;
} else {
pr_err("APRP RTLX init on non-vectored-interrupt processor\n");
err = -ENODEV;
goto out_class;
}
rtlx_irq.dev_id = rtlx;
err = setup_irq(rtlx_irq_num, &rtlx_irq);
if (err)
goto out_class;
return 0;
out_class:
for (i = 0; i < RTLX_CHANNELS; i++)
device_destroy(mt_class, MKDEV(major, i));
out_chrdev:
unregister_chrdev(major, RTLX_MODULE_NAME);
return err;
}
void __exit rtlx_module_exit(void)
{
int i;
for (i = 0; i < RTLX_CHANNELS; i++)
device_destroy(mt_class, MKDEV(major, i));
unregister_chrdev(major, RTLX_MODULE_NAME);
}
......@@ -42,52 +42,12 @@
#include <asm/rtlx.h>
#include <asm/setup.h>
static struct rtlx_info *rtlx;
static int major;
static char module_name[] = "rtlx";
static struct chan_waitqueues {
wait_queue_head_t rt_queue;
wait_queue_head_t lx_queue;
atomic_t in_open;
struct mutex mutex;
} channel_wqs[RTLX_CHANNELS];
static struct vpe_notifications notify;
static int sp_stopping;
extern void *vpe_get_shared(int index);
static void rtlx_dispatch(void)
{
do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ);
}
/* 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)
{
unsigned int vpeflags;
unsigned long flags;
int i;
/* Ought not to be strictly necessary for SMTC builds */
local_irq_save(flags);
vpeflags = dvpe();
set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ);
irq_enable_hazard();
evpe(vpeflags);
local_irq_restore(flags);
for (i = 0; i < RTLX_CHANNELS; i++) {
wake_up(&channel_wqs[i].lx_queue);
wake_up(&channel_wqs[i].rt_queue);
}
return IRQ_HANDLED;
}
struct rtlx_info *rtlx;
struct chan_waitqueues channel_wqs[RTLX_CHANNELS];
struct vpe_notifications rtlx_notify;
void (*aprp_hook)(void) = NULL;
EXPORT_SYMBOL(aprp_hook);
static void __used dump_rtlx(void)
{
......@@ -127,7 +87,7 @@ static int rtlx_init(struct rtlx_info *rtlxi)
}
/* notifications */
static void starting(int vpe)
void rtlx_starting(int vpe)
{
int i;
sp_stopping = 0;
......@@ -140,7 +100,7 @@ static void starting(int vpe)
wake_up_interruptible(&channel_wqs[i].lx_queue);
}
static void stopping(int vpe)
void rtlx_stopping(int vpe)
{
int i;
......@@ -384,6 +344,8 @@ ssize_t rtlx_write(int index, const void __user *buffer, size_t count)
smp_wmb();
mutex_unlock(&channel_wqs[index].mutex);
_interrupt_sp();
return count;
}
......@@ -454,7 +416,7 @@ static ssize_t file_write(struct file *file, const char __user * buffer,
return rtlx_write(minor, buffer, count);
}
static const struct file_operations rtlx_fops = {
const struct file_operations rtlx_fops = {
.owner = THIS_MODULE,
.open = file_open,
.release = file_release,
......@@ -464,90 +426,6 @@ static const struct file_operations rtlx_fops = {
.llseek = noop_llseek,
};
static struct irqaction rtlx_irq = {
.handler = rtlx_interrupt,
.name = "RTLX",
};
static int rtlx_irq_num = MIPS_CPU_IRQ_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)
{
struct device *dev;
int i, err;
if (!cpu_has_mipsmt) {
printk("VPE loader: not a MIPS MT capable processor\n");
return -ENODEV;
}
if (tclimit == 0) {
printk(KERN_WARNING "No TCs reserved for AP/SP, not "
"initializing RTLX.\nPass maxtcs=<n> argument as kernel "
"argument\n");
return -ENODEV;
}
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);
atomic_set(&channel_wqs[i].in_open, 0);
mutex_init(&channel_wqs[i].mutex);
dev = device_create(mt_class, NULL, MKDEV(major, i), NULL,
"%s%d", module_name, i);
if (IS_ERR(dev)) {
err = PTR_ERR(dev);
goto out_chrdev;
}
}
/* set up notifiers */
notify.start = starting;
notify.stop = stopping;
vpe_notify(tclimit, &notify);
if (cpu_has_vint)
set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
else {
pr_err("APRP RTLX init on non-vectored-interrupt processor\n");
err = -ENODEV;
goto out_chrdev;
}
rtlx_irq.dev_id = rtlx;
setup_irq(rtlx_irq_num, &rtlx_irq);
return 0;
out_chrdev:
for (i = 0; i < RTLX_CHANNELS; i++)
device_destroy(mt_class, MKDEV(major, i));
return err;
}
static void __exit rtlx_module_exit(void)
{
int i;
for (i = 0; i < RTLX_CHANNELS; i++)
device_destroy(mt_class, MKDEV(major, i));
unregister_chrdev(major, module_name);
}
module_init(rtlx_module_init);
module_exit(rtlx_module_exit);
......
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