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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: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> Reviewed-by: Qais Yousef <Qais.Yousef@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/6093/ Reviewed-by: John Crispin <blogic@openwrt.org>
This commit is contained in:
Deng-Cheng Zhu
Ralf Baechle
parent
17a1d523aa
commit
2c973ef0cc
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@ -1956,6 +1956,11 @@ 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_VPE_APSP_API_MT
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bool
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default "y"
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depends on MIPS_VPE_APSP_API && !MIPS_CMP
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config MIPS_CMP
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bool "MIPS CMP support"
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depends on SYS_SUPPORTS_MIPS_CMP && MIPS_MT_SMP
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@ -1,6 +1,6 @@
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/*
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* Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved.
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*
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* Copyright (C) 2013 Imagination Technologies Ltd.
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*/
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#ifndef __ASM_RTLX_H_
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@ -8,6 +8,8 @@
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#include <irq.h>
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#define RTLX_MODULE_NAME "rtlx"
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#define LX_NODE_BASE 10
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#define MIPS_CPU_RTLX_IRQ 0
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@ -15,18 +17,31 @@
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#define RTLX_VERSION 2
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#define RTLX_xID 0x12345600
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#define RTLX_ID (RTLX_xID | RTLX_VERSION)
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#define RTLX_BUFFER_SIZE 2048
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#define RTLX_CHANNELS 8
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#define RTLX_CHANNEL_STDIO 0
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#define RTLX_CHANNEL_DBG 1
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#define RTLX_CHANNEL_SYSIO 2
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extern int rtlx_open(int index, int can_sleep);
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extern int rtlx_release(int index);
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extern ssize_t rtlx_read(int index, void __user *buff, size_t count);
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extern ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
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extern unsigned int rtlx_read_poll(int index, int can_sleep);
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extern unsigned int rtlx_write_poll(int index);
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void rtlx_starting(int vpe);
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void rtlx_stopping(int vpe);
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int rtlx_open(int index, int can_sleep);
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int rtlx_release(int index);
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ssize_t rtlx_read(int index, void __user *buff, size_t count);
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ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
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unsigned int rtlx_read_poll(int index, int can_sleep);
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unsigned int rtlx_write_poll(int index);
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int __init rtlx_module_init(void);
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void __exit rtlx_module_exit(void);
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void _interrupt_sp(void);
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extern struct vpe_notifications rtlx_notify;
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extern const struct file_operations rtlx_fops;
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extern void (*aprp_hook)(void);
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enum rtlx_state {
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RTLX_STATE_UNUSED = 0,
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@ -35,10 +50,15 @@ enum rtlx_state {
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RTLX_STATE_OPENED
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};
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#define RTLX_BUFFER_SIZE 2048
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extern 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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atomic_t in_open;
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struct mutex mutex;
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} channel_wqs[RTLX_CHANNELS];
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/* each channel supports read and write.
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linux (vpe0) reads lx_buffer and writes rt_buffer
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linux (vpe0) reads lx_buffer and writes rt_buffer
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SP (vpe1) reads rt_buffer and writes lx_buffer
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*/
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struct rtlx_channel {
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@ -55,11 +75,10 @@ struct rtlx_channel {
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char *lx_buffer;
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};
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struct rtlx_info {
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extern struct rtlx_info {
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unsigned long id;
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enum rtlx_state state;
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struct rtlx_channel channel[RTLX_CHANNELS];
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};
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} *rtlx;
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#endif /* __ASM_RTLX_H_ */
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@ -59,6 +59,7 @@ obj-$(CONFIG_MIPS_VPE_LOADER) += vpe.o
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obj-$(CONFIG_MIPS_VPE_LOADER_CMP) += vpe-cmp.o
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obj-$(CONFIG_MIPS_VPE_LOADER_MT) += vpe-mt.o
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obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
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obj-$(CONFIG_MIPS_VPE_APSP_API_MT) += rtlx-mt.o
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obj-$(CONFIG_I8259) += i8259.o
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obj-$(CONFIG_IRQ_CPU) += irq_cpu.o
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148
arch/mips/kernel/rtlx-mt.c
Normal file
148
arch/mips/kernel/rtlx-mt.c
Normal file
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@ -0,0 +1,148 @@
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
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* Copyright (C) 2013 Imagination Technologies Ltd.
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*/
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/err.h>
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#include <linux/wait.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <asm/mips_mt.h>
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#include <asm/vpe.h>
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#include <asm/rtlx.h>
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static int major;
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static void rtlx_dispatch(void)
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{
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if (read_c0_cause() & read_c0_status() & C_SW0)
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do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ);
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}
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/*
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* Interrupt handler may be called before rtlx_init has otherwise had
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* a chance to run.
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*/
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static irqreturn_t rtlx_interrupt(int irq, void *dev_id)
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{
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unsigned int vpeflags;
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unsigned long flags;
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int i;
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/* Ought not to be strictly necessary for SMTC builds */
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local_irq_save(flags);
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vpeflags = dvpe();
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set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ);
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irq_enable_hazard();
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evpe(vpeflags);
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local_irq_restore(flags);
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for (i = 0; i < RTLX_CHANNELS; i++) {
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wake_up(&channel_wqs[i].lx_queue);
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wake_up(&channel_wqs[i].rt_queue);
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}
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return IRQ_HANDLED;
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}
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static struct irqaction rtlx_irq = {
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.handler = rtlx_interrupt,
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.name = "RTLX",
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};
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static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ;
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void _interrupt_sp(void)
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{
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unsigned long flags;
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local_irq_save(flags);
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dvpe();
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settc(1);
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write_vpe_c0_cause(read_vpe_c0_cause() | C_SW0);
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evpe(EVPE_ENABLE);
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local_irq_restore(flags);
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}
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int __init rtlx_module_init(void)
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{
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struct device *dev;
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int i, err;
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if (!cpu_has_mipsmt) {
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pr_warn("VPE loader: not a MIPS MT capable processor\n");
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return -ENODEV;
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}
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if (aprp_cpu_index() == 0) {
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pr_warn("No TCs reserved for AP/SP, not initializing RTLX.\n"
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"Pass maxtcs=<n> argument as kernel argument\n");
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return -ENODEV;
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}
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major = register_chrdev(0, RTLX_MODULE_NAME, &rtlx_fops);
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if (major < 0) {
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pr_err("rtlx_module_init: unable to register device\n");
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return major;
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}
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/* initialise the wait queues */
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for (i = 0; i < RTLX_CHANNELS; i++) {
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init_waitqueue_head(&channel_wqs[i].rt_queue);
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init_waitqueue_head(&channel_wqs[i].lx_queue);
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atomic_set(&channel_wqs[i].in_open, 0);
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mutex_init(&channel_wqs[i].mutex);
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dev = device_create(mt_class, NULL, MKDEV(major, i), NULL,
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"%s%d", RTLX_MODULE_NAME, i);
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if (IS_ERR(dev)) {
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err = PTR_ERR(dev);
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goto out_chrdev;
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}
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}
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/* set up notifiers */
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rtlx_notify.start = rtlx_starting;
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rtlx_notify.stop = rtlx_stopping;
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vpe_notify(aprp_cpu_index(), &rtlx_notify);
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if (cpu_has_vint) {
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aprp_hook = rtlx_dispatch;
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} else {
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pr_err("APRP RTLX init on non-vectored-interrupt processor\n");
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err = -ENODEV;
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goto out_class;
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}
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rtlx_irq.dev_id = rtlx;
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err = setup_irq(rtlx_irq_num, &rtlx_irq);
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if (err)
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goto out_class;
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return 0;
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out_class:
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for (i = 0; i < RTLX_CHANNELS; i++)
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device_destroy(mt_class, MKDEV(major, i));
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out_chrdev:
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unregister_chrdev(major, RTLX_MODULE_NAME);
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return err;
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}
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void __exit rtlx_module_exit(void)
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{
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int i;
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for (i = 0; i < RTLX_CHANNELS; i++)
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device_destroy(mt_class, MKDEV(major, i));
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unregister_chrdev(major, RTLX_MODULE_NAME);
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}
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@ -42,52 +42,12 @@
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#include <asm/rtlx.h>
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#include <asm/setup.h>
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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 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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atomic_t in_open;
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struct mutex mutex;
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} channel_wqs[RTLX_CHANNELS];
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static struct vpe_notifications notify;
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static int sp_stopping;
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extern void *vpe_get_shared(int index);
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static void rtlx_dispatch(void)
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{
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do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ);
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}
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/* Interrupt handler may be called before rtlx_init has otherwise had
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a chance to run.
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*/
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static irqreturn_t rtlx_interrupt(int irq, void *dev_id)
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{
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unsigned int vpeflags;
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unsigned long flags;
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int i;
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/* Ought not to be strictly necessary for SMTC builds */
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local_irq_save(flags);
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vpeflags = dvpe();
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set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ);
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irq_enable_hazard();
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evpe(vpeflags);
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local_irq_restore(flags);
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for (i = 0; i < RTLX_CHANNELS; i++) {
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wake_up(&channel_wqs[i].lx_queue);
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wake_up(&channel_wqs[i].rt_queue);
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}
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return IRQ_HANDLED;
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}
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struct rtlx_info *rtlx;
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struct chan_waitqueues channel_wqs[RTLX_CHANNELS];
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struct vpe_notifications rtlx_notify;
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void (*aprp_hook)(void) = NULL;
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EXPORT_SYMBOL(aprp_hook);
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static void __used dump_rtlx(void)
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{
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@ -127,7 +87,7 @@ static int rtlx_init(struct rtlx_info *rtlxi)
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}
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/* notifications */
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static void starting(int vpe)
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void rtlx_starting(int vpe)
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{
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int i;
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sp_stopping = 0;
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@ -140,7 +100,7 @@ static void starting(int vpe)
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wake_up_interruptible(&channel_wqs[i].lx_queue);
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}
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static void stopping(int vpe)
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void rtlx_stopping(int vpe)
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{
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int i;
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@ -384,6 +344,8 @@ ssize_t rtlx_write(int index, const void __user *buffer, size_t count)
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smp_wmb();
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mutex_unlock(&channel_wqs[index].mutex);
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_interrupt_sp();
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return count;
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}
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@ -454,7 +416,7 @@ static ssize_t file_write(struct file *file, const char __user * buffer,
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return rtlx_write(minor, buffer, count);
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}
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static const struct file_operations rtlx_fops = {
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const struct file_operations rtlx_fops = {
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.owner = THIS_MODULE,
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.open = file_open,
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.release = file_release,
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@ -464,90 +426,6 @@ static const struct file_operations rtlx_fops = {
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.llseek = noop_llseek,
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};
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static struct irqaction rtlx_irq = {
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.handler = rtlx_interrupt,
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.name = "RTLX",
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};
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static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ;
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static char register_chrdev_failed[] __initdata =
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KERN_ERR "rtlx_module_init: unable to register device\n";
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static int __init rtlx_module_init(void)
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{
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struct device *dev;
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int i, err;
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if (!cpu_has_mipsmt) {
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printk("VPE loader: not a MIPS MT capable processor\n");
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return -ENODEV;
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}
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if (tclimit == 0) {
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printk(KERN_WARNING "No TCs reserved for AP/SP, not "
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"initializing RTLX.\nPass maxtcs=<n> argument as kernel "
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"argument\n");
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return -ENODEV;
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}
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major = register_chrdev(0, module_name, &rtlx_fops);
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if (major < 0) {
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printk(register_chrdev_failed);
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return major;
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}
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/* initialise the wait queues */
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for (i = 0; i < RTLX_CHANNELS; i++) {
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init_waitqueue_head(&channel_wqs[i].rt_queue);
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init_waitqueue_head(&channel_wqs[i].lx_queue);
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atomic_set(&channel_wqs[i].in_open, 0);
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mutex_init(&channel_wqs[i].mutex);
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dev = device_create(mt_class, NULL, MKDEV(major, i), NULL,
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"%s%d", module_name, i);
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if (IS_ERR(dev)) {
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err = PTR_ERR(dev);
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goto out_chrdev;
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}
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}
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/* set up notifiers */
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notify.start = starting;
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notify.stop = stopping;
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vpe_notify(tclimit, ¬ify);
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if (cpu_has_vint)
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set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
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else {
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pr_err("APRP RTLX init on non-vectored-interrupt processor\n");
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err = -ENODEV;
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goto out_chrdev;
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}
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rtlx_irq.dev_id = rtlx;
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setup_irq(rtlx_irq_num, &rtlx_irq);
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return 0;
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out_chrdev:
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for (i = 0; i < RTLX_CHANNELS; i++)
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device_destroy(mt_class, MKDEV(major, i));
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return err;
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}
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static void __exit rtlx_module_exit(void)
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{
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int i;
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for (i = 0; i < RTLX_CHANNELS; i++)
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device_destroy(mt_class, MKDEV(major, i));
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unregister_chrdev(major, module_name);
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}
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module_init(rtlx_module_init);
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module_exit(rtlx_module_exit);
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