config FIQ_GLUE
bool
select FIQ
-
-config FIQ_DEBUGGER
- bool "FIQ Mode Serial Debugger"
- select FIQ
- select FIQ_GLUE
- default n
- help
- The FIQ serial debugger can accept commands even when the
- kernel is unresponsive due to being stuck with interrupts
- disabled.
-
-
-config FIQ_DEBUGGER_NO_SLEEP
- bool "Keep serial debugger active"
- depends on FIQ_DEBUGGER
- default n
- help
- Enables the serial debugger at boot. Passing
- fiq_debugger.no_sleep on the kernel commandline will
- override this config option.
-
-config FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
- bool "Don't disable wakeup IRQ when debugger is active"
- depends on FIQ_DEBUGGER
- default n
- help
- Don't disable the wakeup irq when enabling the uart clock. This will
- cause extra interrupts, but it makes the serial debugger usable with
- on some MSM radio builds that ignore the uart clock request in power
- collapse.
-
-config FIQ_DEBUGGER_CONSOLE
- bool "Console on FIQ Serial Debugger port"
- depends on FIQ_DEBUGGER
- default n
- help
- Enables a console so that printk messages are displayed on
- the debugger serial port as the occur.
-
-config FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
- bool "Put the FIQ debugger into console mode by default"
- depends on FIQ_DEBUGGER_CONSOLE
- default n
- help
- If enabled, this puts the fiq debugger into console mode by default.
- Otherwise, the fiq debugger will start out in debug mode.
obj-y += firmware.o
-obj-$(CONFIG_FIQ_DEBUGGER) += fiq_debugger.o
obj-$(CONFIG_FIQ_GLUE) += fiq_glue.o fiq_glue_setup.o
obj-$(CONFIG_ICST) += icst.o
obj-$(CONFIG_SA1111) += sa1111.o
+++ /dev/null
-/*
- * arch/arm/common/fiq_debugger.c
- *
- * Serial Debugger Interface accessed through an FIQ interrupt.
- *
- * Copyright (C) 2008 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that 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.
- */
-
-#include <stdarg.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/console.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/kernel_stat.h>
-#include <linux/kmsg_dump.h>
-#include <linux/irq.h>
-#include <linux/delay.h>
-#include <linux/reboot.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/smp.h>
-#include <linux/timer.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/wakelock.h>
-
-#include <asm/fiq_debugger.h>
-#include <asm/fiq_glue.h>
-#include <asm/stacktrace.h>
-
-#include <linux/uaccess.h>
-
-#include "fiq_debugger_ringbuf.h"
-
-#define DEBUG_MAX 64
-#define MAX_UNHANDLED_FIQ_COUNT 1000000
-
-#define MAX_FIQ_DEBUGGER_PORTS 4
-
-#define THREAD_INFO(sp) ((struct thread_info *) \
- ((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
-
-struct fiq_debugger_state {
- struct fiq_glue_handler handler;
-
- int fiq;
- int uart_irq;
- int signal_irq;
- int wakeup_irq;
- bool wakeup_irq_no_set_wake;
- struct clk *clk;
- struct fiq_debugger_pdata *pdata;
- struct platform_device *pdev;
-
- char debug_cmd[DEBUG_MAX];
- int debug_busy;
- int debug_abort;
-
- char debug_buf[DEBUG_MAX];
- int debug_count;
-
- bool no_sleep;
- bool debug_enable;
- bool ignore_next_wakeup_irq;
- struct timer_list sleep_timer;
- spinlock_t sleep_timer_lock;
- bool uart_enabled;
- struct wake_lock debugger_wake_lock;
- bool console_enable;
- int current_cpu;
- atomic_t unhandled_fiq_count;
- bool in_fiq;
-
- struct work_struct work;
- spinlock_t work_lock;
- char work_cmd[DEBUG_MAX];
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
- spinlock_t console_lock;
- struct console console;
- struct tty_port tty_port;
- struct fiq_debugger_ringbuf *tty_rbuf;
- bool syslog_dumping;
-#endif
-
- unsigned int last_irqs[NR_IRQS];
- unsigned int last_local_timer_irqs[NR_CPUS];
-};
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-struct tty_driver *fiq_tty_driver;
-#endif
-
-#ifdef CONFIG_FIQ_DEBUGGER_NO_SLEEP
-static bool initial_no_sleep = true;
-#else
-static bool initial_no_sleep;
-#endif
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
-static bool initial_debug_enable = true;
-static bool initial_console_enable = true;
-#else
-static bool initial_debug_enable;
-static bool initial_console_enable;
-#endif
-
-static bool fiq_kgdb_enable;
-
-module_param_named(no_sleep, initial_no_sleep, bool, 0644);
-module_param_named(debug_enable, initial_debug_enable, bool, 0644);
-module_param_named(console_enable, initial_console_enable, bool, 0644);
-module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
-
-#ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
-static inline void enable_wakeup_irq(struct fiq_debugger_state *state) {}
-static inline void disable_wakeup_irq(struct fiq_debugger_state *state) {}
-#else
-static inline void enable_wakeup_irq(struct fiq_debugger_state *state)
-{
- if (state->wakeup_irq < 0)
- return;
- enable_irq(state->wakeup_irq);
- if (!state->wakeup_irq_no_set_wake)
- enable_irq_wake(state->wakeup_irq);
-}
-static inline void disable_wakeup_irq(struct fiq_debugger_state *state)
-{
- if (state->wakeup_irq < 0)
- return;
- disable_irq_nosync(state->wakeup_irq);
- if (!state->wakeup_irq_no_set_wake)
- disable_irq_wake(state->wakeup_irq);
-}
-#endif
-
-static bool inline debug_have_fiq(struct fiq_debugger_state *state)
-{
- return (state->fiq >= 0);
-}
-
-static void debug_force_irq(struct fiq_debugger_state *state)
-{
- unsigned int irq = state->signal_irq;
-
- if (WARN_ON(!debug_have_fiq(state)))
- return;
- if (state->pdata->force_irq) {
- state->pdata->force_irq(state->pdev, irq);
- } else {
- struct irq_chip *chip = irq_get_chip(irq);
- if (chip && chip->irq_retrigger)
- chip->irq_retrigger(irq_get_irq_data(irq));
- }
-}
-
-static void debug_uart_enable(struct fiq_debugger_state *state)
-{
- if (state->clk)
- clk_enable(state->clk);
- if (state->pdata->uart_enable)
- state->pdata->uart_enable(state->pdev);
-}
-
-static void debug_uart_disable(struct fiq_debugger_state *state)
-{
- if (state->pdata->uart_disable)
- state->pdata->uart_disable(state->pdev);
- if (state->clk)
- clk_disable(state->clk);
-}
-
-static void debug_uart_flush(struct fiq_debugger_state *state)
-{
- if (state->pdata->uart_flush)
- state->pdata->uart_flush(state->pdev);
-}
-
-static void debug_putc(struct fiq_debugger_state *state, char c)
-{
- state->pdata->uart_putc(state->pdev, c);
-}
-
-static void debug_puts(struct fiq_debugger_state *state, char *s)
-{
- unsigned c;
- while ((c = *s++)) {
- if (c == '\n')
- debug_putc(state, '\r');
- debug_putc(state, c);
- }
-}
-
-static void debug_prompt(struct fiq_debugger_state *state)
-{
- debug_puts(state, "debug> ");
-}
-
-static void dump_kernel_log(struct fiq_debugger_state *state)
-{
- char buf[512];
- size_t len;
- struct kmsg_dumper dumper = { .active = true };
-
-
- kmsg_dump_rewind_nolock(&dumper);
- while (kmsg_dump_get_line_nolock(&dumper, true, buf,
- sizeof(buf) - 1, &len)) {
- buf[len] = 0;
- debug_puts(state, buf);
- }
-}
-
-static char *mode_name(unsigned cpsr)
-{
- switch (cpsr & MODE_MASK) {
- case USR_MODE: return "USR";
- case FIQ_MODE: return "FIQ";
- case IRQ_MODE: return "IRQ";
- case SVC_MODE: return "SVC";
- case ABT_MODE: return "ABT";
- case UND_MODE: return "UND";
- case SYSTEM_MODE: return "SYS";
- default: return "???";
- }
-}
-
-static int debug_printf(void *cookie, const char *fmt, ...)
-{
- struct fiq_debugger_state *state = cookie;
- char buf[256];
- va_list ap;
-
- va_start(ap, fmt);
- vsnprintf(buf, sizeof(buf), fmt, ap);
- va_end(ap);
-
- debug_puts(state, buf);
- return state->debug_abort;
-}
-
-/* Safe outside fiq context */
-static int debug_printf_nfiq(void *cookie, const char *fmt, ...)
-{
- struct fiq_debugger_state *state = cookie;
- char buf[256];
- va_list ap;
- unsigned long irq_flags;
-
- va_start(ap, fmt);
- vsnprintf(buf, 128, fmt, ap);
- va_end(ap);
-
- local_irq_save(irq_flags);
- debug_puts(state, buf);
- debug_uart_flush(state);
- local_irq_restore(irq_flags);
- return state->debug_abort;
-}
-
-static void dump_regs(struct fiq_debugger_state *state, unsigned *regs)
-{
- debug_printf(state, " r0 %08x r1 %08x r2 %08x r3 %08x\n",
- regs[0], regs[1], regs[2], regs[3]);
- debug_printf(state, " r4 %08x r5 %08x r6 %08x r7 %08x\n",
- regs[4], regs[5], regs[6], regs[7]);
- debug_printf(state, " r8 %08x r9 %08x r10 %08x r11 %08x mode %s\n",
- regs[8], regs[9], regs[10], regs[11],
- mode_name(regs[16]));
- if ((regs[16] & MODE_MASK) == USR_MODE)
- debug_printf(state, " ip %08x sp %08x lr %08x pc %08x "
- "cpsr %08x\n", regs[12], regs[13], regs[14],
- regs[15], regs[16]);
- else
- debug_printf(state, " ip %08x sp %08x lr %08x pc %08x "
- "cpsr %08x spsr %08x\n", regs[12], regs[13],
- regs[14], regs[15], regs[16], regs[17]);
-}
-
-struct mode_regs {
- unsigned long sp_svc;
- unsigned long lr_svc;
- unsigned long spsr_svc;
-
- unsigned long sp_abt;
- unsigned long lr_abt;
- unsigned long spsr_abt;
-
- unsigned long sp_und;
- unsigned long lr_und;
- unsigned long spsr_und;
-
- unsigned long sp_irq;
- unsigned long lr_irq;
- unsigned long spsr_irq;
-
- unsigned long r8_fiq;
- unsigned long r9_fiq;
- unsigned long r10_fiq;
- unsigned long r11_fiq;
- unsigned long r12_fiq;
- unsigned long sp_fiq;
- unsigned long lr_fiq;
- unsigned long spsr_fiq;
-};
-
-void __naked get_mode_regs(struct mode_regs *regs)
-{
- asm volatile (
- "mrs r1, cpsr\n"
- "msr cpsr_c, #0xd3 @(SVC_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xd7 @(ABT_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xdb @(UND_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xd2 @(IRQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r13 - r14}\n"
- "mrs r2, spsr\n"
- "msr cpsr_c, #0xd1 @(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
- "stmia r0!, {r2, r8 - r14}\n"
- "mrs r2, spsr\n"
- "stmia r0!, {r2}\n"
- "msr cpsr_c, r1\n"
- "bx lr\n");
-}
-
-
-static void dump_allregs(struct fiq_debugger_state *state, unsigned *regs)
-{
- struct mode_regs mode_regs;
- dump_regs(state, regs);
- get_mode_regs(&mode_regs);
- debug_printf(state, " svc: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_svc, mode_regs.lr_svc, mode_regs.spsr_svc);
- debug_printf(state, " abt: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_abt, mode_regs.lr_abt, mode_regs.spsr_abt);
- debug_printf(state, " und: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_und, mode_regs.lr_und, mode_regs.spsr_und);
- debug_printf(state, " irq: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_irq, mode_regs.lr_irq, mode_regs.spsr_irq);
- debug_printf(state, " fiq: r8 %08x r9 %08x r10 %08x r11 %08x "
- "r12 %08x\n",
- mode_regs.r8_fiq, mode_regs.r9_fiq, mode_regs.r10_fiq,
- mode_regs.r11_fiq, mode_regs.r12_fiq);
- debug_printf(state, " fiq: sp %08x lr %08x spsr %08x\n",
- mode_regs.sp_fiq, mode_regs.lr_fiq, mode_regs.spsr_fiq);
-}
-
-static void dump_irqs(struct fiq_debugger_state *state)
-{
- int n;
- struct irq_desc *desc;
-
- debug_printf(state, "irqnr total since-last status name\n");
- for_each_irq_desc(n, desc) {
- struct irqaction *act = desc->action;
- if (!act && !kstat_irqs(n))
- continue;
- debug_printf(state, "%5d: %10u %11u %8x %s\n", n,
- kstat_irqs(n),
- kstat_irqs(n) - state->last_irqs[n],
- desc->status_use_accessors,
- (act && act->name) ? act->name : "???");
- state->last_irqs[n] = kstat_irqs(n);
- }
-}
-
-struct stacktrace_state {
- struct fiq_debugger_state *state;
- unsigned int depth;
-};
-
-static int report_trace(struct stackframe *frame, void *d)
-{
- struct stacktrace_state *sts = d;
-
- if (sts->depth) {
- debug_printf(sts->state,
- " pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
- frame->pc, frame->pc, frame->lr, frame->lr,
- frame->sp, frame->fp);
- sts->depth--;
- return 0;
- }
- debug_printf(sts->state, " ...\n");
-
- return sts->depth == 0;
-}
-
-struct frame_tail {
- struct frame_tail *fp;
- unsigned long sp;
- unsigned long lr;
-} __attribute__((packed));
-
-static struct frame_tail *user_backtrace(struct fiq_debugger_state *state,
- struct frame_tail *tail)
-{
- struct frame_tail buftail[2];
-
- /* Also check accessibility of one struct frame_tail beyond */
- if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) {
- debug_printf(state, " invalid frame pointer %p\n", tail);
- return NULL;
- }
- if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) {
- debug_printf(state,
- " failed to copy frame pointer %p\n", tail);
- return NULL;
- }
-
- debug_printf(state, " %p\n", buftail[0].lr);
-
- /* frame pointers should strictly progress back up the stack
- * (towards higher addresses) */
- if (tail >= buftail[0].fp)
- return NULL;
-
- return buftail[0].fp-1;
-}
-
-void dump_stacktrace(struct fiq_debugger_state *state,
- struct pt_regs * const regs, unsigned int depth, void *ssp)
-{
- struct frame_tail *tail;
- struct thread_info *real_thread_info = THREAD_INFO(ssp);
- struct stacktrace_state sts;
-
- sts.depth = depth;
- sts.state = state;
- *current_thread_info() = *real_thread_info;
-
- if (!current)
- debug_printf(state, "current NULL\n");
- else
- debug_printf(state, "pid: %d comm: %s\n",
- current->pid, current->comm);
- dump_regs(state, (unsigned *)regs);
-
- if (!user_mode(regs)) {
- struct stackframe frame;
- frame.fp = regs->ARM_fp;
- frame.sp = regs->ARM_sp;
- frame.lr = regs->ARM_lr;
- frame.pc = regs->ARM_pc;
- debug_printf(state,
- " pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
- regs->ARM_pc, regs->ARM_pc, regs->ARM_lr, regs->ARM_lr,
- regs->ARM_sp, regs->ARM_fp);
- walk_stackframe(&frame, report_trace, &sts);
- return;
- }
-
- tail = ((struct frame_tail *) regs->ARM_fp) - 1;
- while (depth-- && tail && !((unsigned long) tail & 3))
- tail = user_backtrace(state, tail);
-}
-
-static void do_ps(struct fiq_debugger_state *state)
-{
- struct task_struct *g;
- struct task_struct *p;
- unsigned task_state;
- static const char stat_nam[] = "RSDTtZX";
-
- debug_printf(state, "pid ppid prio task pc\n");
- read_lock(&tasklist_lock);
- do_each_thread(g, p) {
- task_state = p->state ? __ffs(p->state) + 1 : 0;
- debug_printf(state,
- "%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
- debug_printf(state, "%-13.13s %c", p->comm,
- task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
- if (task_state == TASK_RUNNING)
- debug_printf(state, " running\n");
- else
- debug_printf(state, " %08lx\n", thread_saved_pc(p));
- } while_each_thread(g, p);
- read_unlock(&tasklist_lock);
-}
-
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
-static void begin_syslog_dump(struct fiq_debugger_state *state)
-{
- state->syslog_dumping = true;
-}
-
-static void end_syslog_dump(struct fiq_debugger_state *state)
-{
- state->syslog_dumping = false;
-}
-#else
-extern int do_syslog(int type, char __user *bug, int count);
-static void begin_syslog_dump(struct fiq_debugger_state *state)
-{
- do_syslog(5 /* clear */, NULL, 0);
-}
-
-static void end_syslog_dump(struct fiq_debugger_state *state)
-{
- dump_kernel_log(state);
-}
-#endif
-
-static void do_sysrq(struct fiq_debugger_state *state, char rq)
-{
- if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
- debug_printf(state, "sysrq-g blocked\n");
- return;
- }
- begin_syslog_dump(state);
- handle_sysrq(rq);
- end_syslog_dump(state);
-}
-
-#ifdef CONFIG_KGDB
-static void do_kgdb(struct fiq_debugger_state *state)
-{
- if (!fiq_kgdb_enable) {
- debug_printf(state, "kgdb through fiq debugger not enabled\n");
- return;
- }
-
- debug_printf(state, "enabling console and triggering kgdb\n");
- state->console_enable = true;
- handle_sysrq('g');
-}
-#endif
-
-static void debug_schedule_work(struct fiq_debugger_state *state, char *cmd)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&state->work_lock, flags);
- if (state->work_cmd[0] != '\0') {
- debug_printf(state, "work command processor busy\n");
- spin_unlock_irqrestore(&state->work_lock, flags);
- return;
- }
-
- strlcpy(state->work_cmd, cmd, sizeof(state->work_cmd));
- spin_unlock_irqrestore(&state->work_lock, flags);
-
- schedule_work(&state->work);
-}
-
-static void debug_work(struct work_struct *work)
-{
- struct fiq_debugger_state *state;
- char work_cmd[DEBUG_MAX];
- char *cmd;
- unsigned long flags;
-
- state = container_of(work, struct fiq_debugger_state, work);
-
- spin_lock_irqsave(&state->work_lock, flags);
-
- strlcpy(work_cmd, state->work_cmd, sizeof(work_cmd));
- state->work_cmd[0] = '\0';
-
- spin_unlock_irqrestore(&state->work_lock, flags);
-
- cmd = work_cmd;
- if (!strncmp(cmd, "reboot", 6)) {
- cmd += 6;
- while (*cmd == ' ')
- cmd++;
- if (cmd != '\0')
- kernel_restart(cmd);
- else
- kernel_restart(NULL);
- } else {
- debug_printf(state, "unknown work command '%s'\n", work_cmd);
- }
-}
-
-/* This function CANNOT be called in FIQ context */
-static void debug_irq_exec(struct fiq_debugger_state *state, char *cmd)
-{
- if (!strcmp(cmd, "ps"))
- do_ps(state);
- if (!strcmp(cmd, "sysrq"))
- do_sysrq(state, 'h');
- if (!strncmp(cmd, "sysrq ", 6))
- do_sysrq(state, cmd[6]);
-#ifdef CONFIG_KGDB
- if (!strcmp(cmd, "kgdb"))
- do_kgdb(state);
-#endif
- if (!strncmp(cmd, "reboot", 6))
- debug_schedule_work(state, cmd);
-}
-
-static void debug_help(struct fiq_debugger_state *state)
-{
- debug_printf(state, "FIQ Debugger commands:\n"
- " pc PC status\n"
- " regs Register dump\n"
- " allregs Extended Register dump\n"
- " bt Stack trace\n"
- " reboot [<c>] Reboot with command <c>\n"
- " reset [<c>] Hard reset with command <c>\n"
- " irqs Interupt status\n"
- " kmsg Kernel log\n"
- " version Kernel version\n");
- debug_printf(state, " sleep Allow sleep while in FIQ\n"
- " nosleep Disable sleep while in FIQ\n"
- " console Switch terminal to console\n"
- " cpu Current CPU\n"
- " cpu <number> Switch to CPU<number>\n");
- debug_printf(state, " ps Process list\n"
- " sysrq sysrq options\n"
- " sysrq <param> Execute sysrq with <param>\n");
-#ifdef CONFIG_KGDB
- debug_printf(state, " kgdb Enter kernel debugger\n");
-#endif
-}
-
-static void take_affinity(void *info)
-{
- struct fiq_debugger_state *state = info;
- struct cpumask cpumask;
-
- cpumask_clear(&cpumask);
- cpumask_set_cpu(get_cpu(), &cpumask);
-
- irq_set_affinity(state->uart_irq, &cpumask);
-}
-
-static void switch_cpu(struct fiq_debugger_state *state, int cpu)
-{
- if (!debug_have_fiq(state))
- smp_call_function_single(cpu, take_affinity, state, false);
- state->current_cpu = cpu;
-}
-
-static bool debug_fiq_exec(struct fiq_debugger_state *state,
- const char *cmd, unsigned *regs, void *svc_sp)
-{
- bool signal_helper = false;
-
- if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
- debug_help(state);
- } else if (!strcmp(cmd, "pc")) {
- debug_printf(state, " pc %08x cpsr %08x mode %s\n",
- regs[15], regs[16], mode_name(regs[16]));
- } else if (!strcmp(cmd, "regs")) {
- dump_regs(state, regs);
- } else if (!strcmp(cmd, "allregs")) {
- dump_allregs(state, regs);
- } else if (!strcmp(cmd, "bt")) {
- dump_stacktrace(state, (struct pt_regs *)regs, 100, svc_sp);
- } else if (!strncmp(cmd, "reset", 5)) {
- cmd += 5;
- while (*cmd == ' ')
- cmd++;
- if (*cmd) {
- char tmp_cmd[32];
- strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd));
- machine_restart(tmp_cmd);
- } else {
- machine_restart(NULL);
- }
- } else if (!strcmp(cmd, "irqs")) {
- dump_irqs(state);
- } else if (!strcmp(cmd, "kmsg")) {
- dump_kernel_log(state);
- } else if (!strcmp(cmd, "version")) {
- debug_printf(state, "%s\n", linux_banner);
- } else if (!strcmp(cmd, "sleep")) {
- state->no_sleep = false;
- debug_printf(state, "enabling sleep\n");
- } else if (!strcmp(cmd, "nosleep")) {
- state->no_sleep = true;
- debug_printf(state, "disabling sleep\n");
- } else if (!strcmp(cmd, "console")) {
- debug_printf(state, "console mode\n");
- debug_uart_flush(state);
- state->console_enable = true;
- } else if (!strcmp(cmd, "cpu")) {
- debug_printf(state, "cpu %d\n", state->current_cpu);
- } else if (!strncmp(cmd, "cpu ", 4)) {
- unsigned long cpu = 0;
- if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
- switch_cpu(state, cpu);
- else
- debug_printf(state, "invalid cpu\n");
- debug_printf(state, "cpu %d\n", state->current_cpu);
- } else {
- if (state->debug_busy) {
- debug_printf(state,
- "command processor busy. trying to abort.\n");
- state->debug_abort = -1;
- } else {
- strcpy(state->debug_cmd, cmd);
- state->debug_busy = 1;
- }
-
- return true;
- }
- if (!state->console_enable)
- debug_prompt(state);
-
- return signal_helper;
-}
-
-static void sleep_timer_expired(unsigned long data)
-{
- struct fiq_debugger_state *state = (struct fiq_debugger_state *)data;
- unsigned long flags;
-
- spin_lock_irqsave(&state->sleep_timer_lock, flags);
- if (state->uart_enabled && !state->no_sleep) {
- if (state->debug_enable && !state->console_enable) {
- state->debug_enable = false;
- debug_printf_nfiq(state, "suspending fiq debugger\n");
- }
- state->ignore_next_wakeup_irq = true;
- debug_uart_disable(state);
- state->uart_enabled = false;
- enable_wakeup_irq(state);
- }
- wake_unlock(&state->debugger_wake_lock);
- spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-}
-
-static void handle_wakeup(struct fiq_debugger_state *state)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&state->sleep_timer_lock, flags);
- if (state->wakeup_irq >= 0 && state->ignore_next_wakeup_irq) {
- state->ignore_next_wakeup_irq = false;
- } else if (!state->uart_enabled) {
- wake_lock(&state->debugger_wake_lock);
- debug_uart_enable(state);
- state->uart_enabled = true;
- disable_wakeup_irq(state);
- mod_timer(&state->sleep_timer, jiffies + HZ / 2);
- }
- spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
-}
-
-static irqreturn_t wakeup_irq_handler(int irq, void *dev)
-{
- struct fiq_debugger_state *state = dev;
-
- if (!state->no_sleep)
- debug_puts(state, "WAKEUP\n");
- handle_wakeup(state);
-
- return IRQ_HANDLED;
-}
-
-static void debug_handle_console_irq_context(struct fiq_debugger_state *state)
-{
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
- if (state->tty_port.ops) {
- int i;
- int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
- for (i = 0; i < count; i++) {
- int c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
- tty_insert_flip_char(&state->tty_port, c, TTY_NORMAL);
- if (!fiq_debugger_ringbuf_consume(state->tty_rbuf, 1))
- pr_warn("fiq tty failed to consume byte\n");
- }
- tty_flip_buffer_push(&state->tty_port);
- }
-#endif
-}
-
-static void debug_handle_irq_context(struct fiq_debugger_state *state)
-{
- if (!state->no_sleep) {
- unsigned long flags;
-
- spin_lock_irqsave(&state->sleep_timer_lock, flags);
- wake_lock(&state->debugger_wake_lock);
- mod_timer(&state->sleep_timer, jiffies + HZ * 5);
- spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
- }
- debug_handle_console_irq_context(state);
- if (state->debug_busy) {
- debug_irq_exec(state, state->debug_cmd);
- if (!state->console_enable)
- debug_prompt(state);
- state->debug_busy = 0;
- }
-}
-
-static int debug_getc(struct fiq_debugger_state *state)
-{
- return state->pdata->uart_getc(state->pdev);
-}
-
-static bool debug_handle_uart_interrupt(struct fiq_debugger_state *state,
- int this_cpu, void *regs, void *svc_sp)
-{
- int c;
- static int last_c;
- int count = 0;
- bool signal_helper = false;
-
- if (this_cpu != state->current_cpu) {
- if (state->in_fiq)
- return false;
-
- if (atomic_inc_return(&state->unhandled_fiq_count) !=
- MAX_UNHANDLED_FIQ_COUNT)
- return false;
-
- debug_printf(state, "fiq_debugger: cpu %d not responding, "
- "reverting to cpu %d\n", state->current_cpu,
- this_cpu);
-
- atomic_set(&state->unhandled_fiq_count, 0);
- switch_cpu(state, this_cpu);
- return false;
- }
-
- state->in_fiq = true;
-
- while ((c = debug_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
- count++;
- if (!state->debug_enable) {
- if ((c == 13) || (c == 10)) {
- state->debug_enable = true;
- state->debug_count = 0;
- debug_prompt(state);
- }
- } else if (c == FIQ_DEBUGGER_BREAK) {
- state->console_enable = false;
- debug_puts(state, "fiq debugger mode\n");
- state->debug_count = 0;
- debug_prompt(state);
-#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
- } else if (state->console_enable && state->tty_rbuf) {
- fiq_debugger_ringbuf_push(state->tty_rbuf, c);
- signal_helper = true;
-#endif
- } else if ((c >= ' ') && (c < 127)) {
- if (state->debug_count < (DEBUG_MAX - 1)) {
- state->debug_buf[state->debug_count++] = c;
- debug_putc(state, c);
- }
- } else if ((c == 8) || (c == 127)) {
- if (state->debug_count > 0) {
- state->debug_count--;
- debug_putc(state, 8);
- debug_putc(state, ' ');
- debug_putc(state, 8);
- }
- } else if ((c == 13) || (c == 10)) {
- if (c == '\r' || (c == '\n' && last_c != '\r')) {
- debug_putc(state, '\r');
- debug_putc(state, '\n');
- }
- if (state->debug_count) {
- state->debug_buf[state->debug_count] = 0;
- state->debug_count = 0;
- signal_helper |=
- debug_fiq_exec(state, state->debug_buf,
- regs, svc_sp);
- } else {
- debug_prompt(state);
- }
- }
- last_c = c;
- }
- if (!state->console_enable)
- debug_uart_flush(state);
- if (state->pdata->fiq_ack)
- state->pdata->fiq_ack(state->pdev, state->fiq);
-
- /* poke sleep timer if necessary */
- if (state->debug_enable && !state->no_sleep)
- signal_helper = true;
-
- atomic_set(&state->unhandled_fiq_count, 0);
- state->in_fiq = false;
-
- return signal_helper;
-}
-
-static void debug_fiq(struct fiq_glue_handler *h, void *regs, void *svc_sp)
-{
- struct fiq_debugger_state *state =
- container_of(h, struct fiq_debugger_state, handler);
- unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
- bool need_irq;
-
- need_irq = debug_handle_uart_interrupt(state, this_cpu, regs, svc_sp);
- if (need_irq)
- debug_force_irq(state);
-}
-
-/*
- * When not using FIQs, we only use this single interrupt as an entry point.
- * This just effectively takes over the UART interrupt and does all the work
- * in this context.
- */
-static irqreturn_t debug_uart_irq(int irq, void *dev)
-{
- struct fiq_debugger_state *state = dev;
- bool not_done;
-
- handle_wakeup(state);
-
- /* handle the debugger irq in regular context */
- not_done = debug_handle_uart_interrupt(state, smp_processor_id(),
- get_irq_regs(),
- current_thread_info());
- if (not_done)
- debug_handle_irq_context(state);
-
- return IRQ_HANDLED;
-}
-
-/*
- * If FIQs are used, not everything can happen in fiq context.
- * FIQ handler does what it can and then signals this interrupt to finish the
- * job in irq context.
- */
-static irqreturn_t debug_signal_irq(int irq, void *dev)
-{
- struct fiq_debugger_state *state = dev;
-
- if (state->pdata->force_irq_ack)
- state->pdata->force_irq_ack(state->pdev, state->signal_irq);
-
- debug_handle_irq_context(state);
-
- return IRQ_HANDLED;
-}
-
-static void debug_resume(struct fiq_glue_handler *h)
-{
- struct fiq_debugger_state *state =
- container_of(h, struct fiq_debugger_state, handler);
- if (state->pdata->uart_resume)
- state->pdata->uart_resume(state->pdev);
-}
-
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
-struct tty_driver *debug_console_device(struct console *co, int *index)
-{
- *index = co->index;
- return fiq_tty_driver;
-}
-
-static void debug_console_write(struct console *co,
- const char *s, unsigned int count)
-{
- struct fiq_debugger_state *state;
- unsigned long flags;
-
- state = container_of(co, struct fiq_debugger_state, console);
-
- if (!state->console_enable && !state->syslog_dumping)
- return;
-
- debug_uart_enable(state);
- spin_lock_irqsave(&state->console_lock, flags);
- while (count--) {
- if (*s == '\n')
- debug_putc(state, '\r');
- debug_putc(state, *s++);
- }
- debug_uart_flush(state);
- spin_unlock_irqrestore(&state->console_lock, flags);
- debug_uart_disable(state);
-}
-
-static struct console fiq_debugger_console = {
- .name = "ttyFIQ",
- .device = debug_console_device,
- .write = debug_console_write,
- .flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
-};
-
-int fiq_tty_open(struct tty_struct *tty, struct file *filp)
-{
- int line = tty->index;
- struct fiq_debugger_state **states = tty->driver->driver_state;
- struct fiq_debugger_state *state = states[line];
-
- return tty_port_open(&state->tty_port, tty, filp);
-}
-
-void fiq_tty_close(struct tty_struct *tty, struct file *filp)
-{
- tty_port_close(tty->port, tty, filp);
-}
-
-int fiq_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
- int i;
- int line = tty->index;
- struct fiq_debugger_state **states = tty->driver->driver_state;
- struct fiq_debugger_state *state = states[line];
-
- if (!state->console_enable)
- return count;
-
- debug_uart_enable(state);
- spin_lock_irq(&state->console_lock);
- for (i = 0; i < count; i++)
- debug_putc(state, *buf++);
- spin_unlock_irq(&state->console_lock);
- debug_uart_disable(state);
-
- return count;
-}
-
-int fiq_tty_write_room(struct tty_struct *tty)
-{
- return 16;
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-static int fiq_tty_poll_init(struct tty_driver *driver, int line, char *options)
-{
- return 0;
-}
-
-static int fiq_tty_poll_get_char(struct tty_driver *driver, int line)
-{
- struct fiq_debugger_state **states = driver->driver_state;
- struct fiq_debugger_state *state = states[line];
- int c = NO_POLL_CHAR;
-
- debug_uart_enable(state);
- if (debug_have_fiq(state)) {
- int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
- if (count > 0) {
- c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
- fiq_debugger_ringbuf_consume(state->tty_rbuf, 1);
- }
- } else {
- c = debug_getc(state);
- if (c == FIQ_DEBUGGER_NO_CHAR)
- c = NO_POLL_CHAR;
- }
- debug_uart_disable(state);
-
- return c;
-}
-
-static void fiq_tty_poll_put_char(struct tty_driver *driver, int line, char ch)
-{
- struct fiq_debugger_state **states = driver->driver_state;
- struct fiq_debugger_state *state = states[line];
- debug_uart_enable(state);
- debug_putc(state, ch);
- debug_uart_disable(state);
-}
-#endif
-
-static const struct tty_port_operations fiq_tty_port_ops;
-
-static const struct tty_operations fiq_tty_driver_ops = {
- .write = fiq_tty_write,
- .write_room = fiq_tty_write_room,
- .open = fiq_tty_open,
- .close = fiq_tty_close,
-#ifdef CONFIG_CONSOLE_POLL
- .poll_init = fiq_tty_poll_init,
- .poll_get_char = fiq_tty_poll_get_char,
- .poll_put_char = fiq_tty_poll_put_char,
-#endif
-};
-
-static int fiq_debugger_tty_init(void)
-{
- int ret;
- struct fiq_debugger_state **states = NULL;
-
- states = kzalloc(sizeof(*states) * MAX_FIQ_DEBUGGER_PORTS, GFP_KERNEL);
- if (!states) {
- pr_err("Failed to allocate fiq debugger state structres\n");
- return -ENOMEM;
- }
-
- fiq_tty_driver = alloc_tty_driver(MAX_FIQ_DEBUGGER_PORTS);
- if (!fiq_tty_driver) {
- pr_err("Failed to allocate fiq debugger tty\n");
- ret = -ENOMEM;
- goto err_free_state;
- }
-
- fiq_tty_driver->owner = THIS_MODULE;
- fiq_tty_driver->driver_name = "fiq-debugger";
- fiq_tty_driver->name = "ttyFIQ";
- fiq_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- fiq_tty_driver->subtype = SERIAL_TYPE_NORMAL;
- fiq_tty_driver->init_termios = tty_std_termios;
- fiq_tty_driver->flags = TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_DYNAMIC_DEV;
- fiq_tty_driver->driver_state = states;
-
- fiq_tty_driver->init_termios.c_cflag =
- B115200 | CS8 | CREAD | HUPCL | CLOCAL;
- fiq_tty_driver->init_termios.c_ispeed = 115200;
- fiq_tty_driver->init_termios.c_ospeed = 115200;
-
- tty_set_operations(fiq_tty_driver, &fiq_tty_driver_ops);
-
- ret = tty_register_driver(fiq_tty_driver);
- if (ret) {
- pr_err("Failed to register fiq tty: %d\n", ret);
- goto err_free_tty;
- }
-
- pr_info("Registered FIQ tty driver\n");
- return 0;
-
-err_free_tty:
- put_tty_driver(fiq_tty_driver);
- fiq_tty_driver = NULL;
-err_free_state:
- kfree(states);
- return ret;
-}
-
-static int fiq_debugger_tty_init_one(struct fiq_debugger_state *state)
-{
- int ret;
- struct device *tty_dev;
- struct fiq_debugger_state **states = fiq_tty_driver->driver_state;
-
- states[state->pdev->id] = state;
-
- state->tty_rbuf = fiq_debugger_ringbuf_alloc(1024);
- if (!state->tty_rbuf) {
- pr_err("Failed to allocate fiq debugger ringbuf\n");
- ret = -ENOMEM;
- goto err;
- }
-
- tty_port_init(&state->tty_port);
- state->tty_port.ops = &fiq_tty_port_ops;
-
- tty_dev = tty_port_register_device(&state->tty_port, fiq_tty_driver,
- state->pdev->id, &state->pdev->dev);
- if (IS_ERR(tty_dev)) {
- pr_err("Failed to register fiq debugger tty device\n");
- ret = PTR_ERR(tty_dev);
- goto err;
- }
-
- device_set_wakeup_capable(tty_dev, 1);
-
- pr_info("Registered fiq debugger ttyFIQ%d\n", state->pdev->id);
-
- return 0;
-
-err:
- fiq_debugger_ringbuf_free(state->tty_rbuf);
- state->tty_rbuf = NULL;
- return ret;
-}
-#endif
-
-static int fiq_debugger_dev_suspend(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct fiq_debugger_state *state = platform_get_drvdata(pdev);
-
- if (state->pdata->uart_dev_suspend)
- return state->pdata->uart_dev_suspend(pdev);
- return 0;
-}
-
-static int fiq_debugger_dev_resume(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct fiq_debugger_state *state = platform_get_drvdata(pdev);
-
- if (state->pdata->uart_dev_resume)
- return state->pdata->uart_dev_resume(pdev);
- return 0;
-}
-
-static int fiq_debugger_probe(struct platform_device *pdev)
-{
- int ret;
- struct fiq_debugger_pdata *pdata = dev_get_platdata(&pdev->dev);
- struct fiq_debugger_state *state;
- int fiq;
- int uart_irq;
-
- if (pdev->id >= MAX_FIQ_DEBUGGER_PORTS)
- return -EINVAL;
-
- if (!pdata->uart_getc || !pdata->uart_putc)
- return -EINVAL;
- if ((pdata->uart_enable && !pdata->uart_disable) ||
- (!pdata->uart_enable && pdata->uart_disable))
- return -EINVAL;
-
- fiq = platform_get_irq_byname(pdev, "fiq");
- uart_irq = platform_get_irq_byname(pdev, "uart_irq");
-
- /* uart_irq mode and fiq mode are mutually exclusive, but one of them
- * is required */
- if ((uart_irq < 0 && fiq < 0) || (uart_irq >= 0 && fiq >= 0))
- return -EINVAL;
- if (fiq >= 0 && !pdata->fiq_enable)
- return -EINVAL;
-
- state = kzalloc(sizeof(*state), GFP_KERNEL);
- setup_timer(&state->sleep_timer, sleep_timer_expired,
- (unsigned long)state);
- state->pdata = pdata;
- state->pdev = pdev;
- state->no_sleep = initial_no_sleep;
- state->debug_enable = initial_debug_enable;
- state->console_enable = initial_console_enable;
-
- state->fiq = fiq;
- state->uart_irq = uart_irq;
- state->signal_irq = platform_get_irq_byname(pdev, "signal");
- state->wakeup_irq = platform_get_irq_byname(pdev, "wakeup");
-
- INIT_WORK(&state->work, debug_work);
- spin_lock_init(&state->work_lock);
-
- platform_set_drvdata(pdev, state);
-
- spin_lock_init(&state->sleep_timer_lock);
-
- if (state->wakeup_irq < 0 && debug_have_fiq(state))
- state->no_sleep = true;
- state->ignore_next_wakeup_irq = !state->no_sleep;
-
- wake_lock_init(&state->debugger_wake_lock,
- WAKE_LOCK_SUSPEND, "serial-debug");
-
- state->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(state->clk))
- state->clk = NULL;
-
- /* do not call pdata->uart_enable here since uart_init may still
- * need to do some initialization before uart_enable can work.
- * So, only try to manage the clock during init.
- */
- if (state->clk)
- clk_enable(state->clk);
-
- if (pdata->uart_init) {
- ret = pdata->uart_init(pdev);
- if (ret)
- goto err_uart_init;
- }
-
- debug_printf_nfiq(state, "<hit enter %sto activate fiq debugger>\n",
- state->no_sleep ? "" : "twice ");
-
- if (debug_have_fiq(state)) {
- state->handler.fiq = debug_fiq;
- state->handler.resume = debug_resume;
- ret = fiq_glue_register_handler(&state->handler);
- if (ret) {
- pr_err("%s: could not install fiq handler\n", __func__);
- goto err_register_fiq;
- }
-
- pdata->fiq_enable(pdev, state->fiq, 1);
- } else {
- ret = request_irq(state->uart_irq, debug_uart_irq,
- IRQF_NO_SUSPEND, "debug", state);
- if (ret) {
- pr_err("%s: could not install irq handler\n", __func__);
- goto err_register_irq;
- }
-
- /* for irq-only mode, we want this irq to wake us up, if it
- * can.
- */
- enable_irq_wake(state->uart_irq);
- }
-
- if (state->clk)
- clk_disable(state->clk);
-
- if (state->signal_irq >= 0) {
- ret = request_irq(state->signal_irq, debug_signal_irq,
- IRQF_TRIGGER_RISING, "debug-signal", state);
- if (ret)
- pr_err("serial_debugger: could not install signal_irq");
- }
-
- if (state->wakeup_irq >= 0) {
- ret = request_irq(state->wakeup_irq, wakeup_irq_handler,
- IRQF_TRIGGER_FALLING | IRQF_DISABLED,
- "debug-wakeup", state);
- if (ret) {
- pr_err("serial_debugger: "
- "could not install wakeup irq\n");
- state->wakeup_irq = -1;
- } else {
- ret = enable_irq_wake(state->wakeup_irq);
- if (ret) {
- pr_err("serial_debugger: "
- "could not enable wakeup\n");
- state->wakeup_irq_no_set_wake = true;
- }
- }
- }
- if (state->no_sleep)
- handle_wakeup(state);
-
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
- spin_lock_init(&state->console_lock);
- state->console = fiq_debugger_console;
- state->console.index = pdev->id;
- if (!console_set_on_cmdline)
- add_preferred_console(state->console.name,
- state->console.index, NULL);
- register_console(&state->console);
- fiq_debugger_tty_init_one(state);
-#endif
- return 0;
-
-err_register_irq:
-err_register_fiq:
- if (pdata->uart_free)
- pdata->uart_free(pdev);
-err_uart_init:
- if (state->clk)
- clk_disable(state->clk);
- if (state->clk)
- clk_put(state->clk);
- wake_lock_destroy(&state->debugger_wake_lock);
- platform_set_drvdata(pdev, NULL);
- kfree(state);
- return ret;
-}
-
-static const struct dev_pm_ops fiq_debugger_dev_pm_ops = {
- .suspend = fiq_debugger_dev_suspend,
- .resume = fiq_debugger_dev_resume,
-};
-
-static struct platform_driver fiq_debugger_driver = {
- .probe = fiq_debugger_probe,
- .driver = {
- .name = "fiq_debugger",
- .pm = &fiq_debugger_dev_pm_ops,
- },
-};
-
-static int __init fiq_debugger_init(void)
-{
-#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
- fiq_debugger_tty_init();
-#endif
- return platform_driver_register(&fiq_debugger_driver);
-}
-
-postcore_initcall(fiq_debugger_init);
+++ /dev/null
-/*
- * arch/arm/common/fiq_debugger_ringbuf.c
- *
- * simple lockless ringbuffer
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-struct fiq_debugger_ringbuf {
- int len;
- int head;
- int tail;
- u8 buf[];
-};
-
-
-static inline struct fiq_debugger_ringbuf *fiq_debugger_ringbuf_alloc(int len)
-{
- struct fiq_debugger_ringbuf *rbuf;
-
- rbuf = kzalloc(sizeof(*rbuf) + len, GFP_KERNEL);
- if (rbuf == NULL)
- return NULL;
-
- rbuf->len = len;
- rbuf->head = 0;
- rbuf->tail = 0;
- smp_mb();
-
- return rbuf;
-}
-
-static inline void fiq_debugger_ringbuf_free(struct fiq_debugger_ringbuf *rbuf)
-{
- kfree(rbuf);
-}
-
-static inline int fiq_debugger_ringbuf_level(struct fiq_debugger_ringbuf *rbuf)
-{
- int level = rbuf->head - rbuf->tail;
-
- if (level < 0)
- level = rbuf->len + level;
-
- return level;
-}
-
-static inline int fiq_debugger_ringbuf_room(struct fiq_debugger_ringbuf *rbuf)
-{
- return rbuf->len - fiq_debugger_ringbuf_level(rbuf) - 1;
-}
-
-static inline u8
-fiq_debugger_ringbuf_peek(struct fiq_debugger_ringbuf *rbuf, int i)
-{
- return rbuf->buf[(rbuf->tail + i) % rbuf->len];
-}
-
-static inline int
-fiq_debugger_ringbuf_consume(struct fiq_debugger_ringbuf *rbuf, int count)
-{
- count = min(count, fiq_debugger_ringbuf_level(rbuf));
-
- rbuf->tail = (rbuf->tail + count) % rbuf->len;
- smp_mb();
-
- return count;
-}
-
-static inline int
-fiq_debugger_ringbuf_push(struct fiq_debugger_ringbuf *rbuf, u8 datum)
-{
- if (fiq_debugger_ringbuf_room(rbuf) == 0)
- return 0;
-
- rbuf->buf[rbuf->head] = datum;
- smp_mb();
- rbuf->head = (rbuf->head + 1) % rbuf->len;
- smp_mb();
-
- return 1;
-}
+++ /dev/null
-/*
- * arch/arm/include/asm/fiq_debugger.h
- *
- * Copyright (C) 2010 Google, Inc.
- * Author: Colin Cross <ccross@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that 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.
- *
- */
-
-#ifndef _ARCH_ARM_MACH_TEGRA_FIQ_DEBUGGER_H_
-#define _ARCH_ARM_MACH_TEGRA_FIQ_DEBUGGER_H_
-
-#include <linux/serial_core.h>
-
-#define FIQ_DEBUGGER_NO_CHAR NO_POLL_CHAR
-#define FIQ_DEBUGGER_BREAK 0x00ff0100
-
-#define FIQ_DEBUGGER_FIQ_IRQ_NAME "fiq"
-#define FIQ_DEBUGGER_SIGNAL_IRQ_NAME "signal"
-#define FIQ_DEBUGGER_WAKEUP_IRQ_NAME "wakeup"
-
-/**
- * struct fiq_debugger_pdata - fiq debugger platform data
- * @uart_resume: used to restore uart state right before enabling
- * the fiq.
- * @uart_enable: Do the work necessary to communicate with the uart
- * hw (enable clocks, etc.). This must be ref-counted.
- * @uart_disable: Do the work necessary to disable the uart hw
- * (disable clocks, etc.). This must be ref-counted.
- * @uart_dev_suspend: called during PM suspend, generally not needed
- * for real fiq mode debugger.
- * @uart_dev_resume: called during PM resume, generally not needed
- * for real fiq mode debugger.
- */
-struct fiq_debugger_pdata {
- int (*uart_init)(struct platform_device *pdev);
- void (*uart_free)(struct platform_device *pdev);
- int (*uart_resume)(struct platform_device *pdev);
- int (*uart_getc)(struct platform_device *pdev);
- void (*uart_putc)(struct platform_device *pdev, unsigned int c);
- void (*uart_flush)(struct platform_device *pdev);
- void (*uart_enable)(struct platform_device *pdev);
- void (*uart_disable)(struct platform_device *pdev);
-
- int (*uart_dev_suspend)(struct platform_device *pdev);
- int (*uart_dev_resume)(struct platform_device *pdev);
-
- void (*fiq_enable)(struct platform_device *pdev, unsigned int fiq,
- bool enable);
- void (*fiq_ack)(struct platform_device *pdev, unsigned int fiq);
-
- void (*force_irq)(struct platform_device *pdev, unsigned int irq);
- void (*force_irq_ack)(struct platform_device *pdev, unsigned int irq);
-};
-
-#endif
[KEY_ALTERASE] = "AlternateErase", [KEY_CANCEL] = "Cancel",
[KEY_BRIGHTNESSDOWN] = "BrightnessDown", [KEY_BRIGHTNESSUP] = "BrightnessUp",
[KEY_MEDIA] = "Media", [KEY_UNKNOWN] = "Unknown",
+ [BTN_DPAD_UP] = "BtnDPadUp", [BTN_DPAD_DOWN] = "BtnDPadDown",
+ [BTN_DPAD_LEFT] = "BtnDPadLeft", [BTN_DPAD_RIGHT] = "BtnDPadRight",
[BTN_0] = "Btn0", [BTN_1] = "Btn1",
[BTN_2] = "Btn2", [BTN_3] = "Btn3",
[BTN_4] = "Btn4", [BTN_5] = "Btn5",
[BTN_TOOL_MOUSE] = "ToolMouse", [BTN_TOOL_LENS] = "ToolLens",
[BTN_TOUCH] = "Touch", [BTN_STYLUS] = "Stylus",
[BTN_STYLUS2] = "Stylus2", [BTN_TOOL_DOUBLETAP] = "ToolDoubleTap",
- [BTN_TOOL_TRIPLETAP] = "ToolTripleTap", [BTN_GEAR_DOWN] = "WheelBtn",
+ [BTN_TOOL_TRIPLETAP] = "ToolTripleTap", [BTN_TOOL_QUADTAP] = "ToolQuadrupleTap",
+ [BTN_GEAR_DOWN] = "WheelBtn",
[BTN_GEAR_UP] = "Gear up", [KEY_OK] = "Ok",
[KEY_SELECT] = "Select", [KEY_GOTO] = "Goto",
[KEY_CLEAR] = "Clear", [KEY_POWER2] = "Power2",
[KEY_KBDILLUMDOWN] = "KbdIlluminationDown",
[KEY_KBDILLUMUP] = "KbdIlluminationUp",
[KEY_SWITCHVIDEOMODE] = "SwitchVideoMode",
+ [KEY_BUTTONCONFIG] = "ButtonConfig",
+ [KEY_TASKMANAGER] = "TaskManager",
+ [KEY_JOURNAL] = "Journal",
+ [KEY_CONTROLPANEL] = "ControlPanel",
+ [KEY_APPSELECT] = "AppSelect",
+ [KEY_SCREENSAVER] = "ScreenSaver",
+ [KEY_VOICECOMMAND] = "VoiceCommand",
+ [KEY_BRIGHTNESS_MIN] = "BrightnessMin",
+ [KEY_BRIGHTNESS_MAX] = "BrightnessMax",
+ [KEY_BRIGHTNESS_AUTO] = "BrightnessAuto",
};
static const char *relatives[REL_MAX + 1] = {
case 0x06c: map_key_clear(KEY_YELLOW); break;
case 0x06d: map_key_clear(KEY_ZOOM); break;
+ case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break;
+ case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break;
+ case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break;
+ case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break;
+ case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break;
+ case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break;
+
case 0x082: map_key_clear(KEY_VIDEO_NEXT); break;
case 0x083: map_key_clear(KEY_LAST); break;
case 0x084: map_key_clear(KEY_ENTER); break;
case 0x0bf: map_key_clear(KEY_SLOW); break;
case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break;
+ case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break;
case 0x0e0: map_abs_clear(ABS_VOLUME); break;
case 0x0e2: map_key_clear(KEY_MUTE); break;
case 0x0e5: map_key_clear(KEY_BASSBOOST); break;
case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break;
case 0x0f5: map_key_clear(KEY_SLOW); break;
+ case 0x181: map_key_clear(KEY_BUTTONCONFIG); break;
case 0x182: map_key_clear(KEY_BOOKMARKS); break;
case 0x183: map_key_clear(KEY_CONFIG); break;
case 0x184: map_key_clear(KEY_WORDPROCESSOR); break;
case 0x18c: map_key_clear(KEY_VOICEMAIL); break;
case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break;
case 0x18e: map_key_clear(KEY_CALENDAR); break;
+ case 0x18f: map_key_clear(KEY_TASKMANAGER); break;
+ case 0x190: map_key_clear(KEY_JOURNAL); break;
case 0x191: map_key_clear(KEY_FINANCE); break;
case 0x192: map_key_clear(KEY_CALC); break;
case 0x193: map_key_clear(KEY_PLAYER); break;
case 0x199: map_key_clear(KEY_CHAT); break;
case 0x19c: map_key_clear(KEY_LOGOFF); break;
case 0x19e: map_key_clear(KEY_COFFEE); break;
+ case 0x19f: map_key_clear(KEY_CONTROLPANEL); break;
+ case 0x1a2: map_key_clear(KEY_APPSELECT); break;
+ case 0x1a3: map_key_clear(KEY_NEXT); break;
+ case 0x1a4: map_key_clear(KEY_PREVIOUS); break;
case 0x1a6: map_key_clear(KEY_HELP); break;
case 0x1a7: map_key_clear(KEY_DOCUMENTS); break;
case 0x1ab: map_key_clear(KEY_SPELLCHECK); break;
case 0x1ae: map_key_clear(KEY_KEYBOARD); break;
+ case 0x1b1: map_key_clear(KEY_SCREENSAVER); break;
+ case 0x1b4: map_key_clear(KEY_FILE); break;
case 0x1b6: map_key_clear(KEY_IMAGES); break;
case 0x1b7: map_key_clear(KEY_AUDIO); break;
case 0x1b8: map_key_clear(KEY_VIDEO); break;
int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data)
{
- unsigned long l;
- char *p;
+ unsigned long l = 0;
+ char *p = NULL;
+ char *cmdline = data;
pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
- if (depth != 1 || !data ||
+ if (depth != 1 || !cmdline ||
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
return 0;
early_init_dt_check_for_initrd(node);
/* Put CONFIG_CMDLINE in if forced or if data had nothing in it to start */
- if (overwrite_incoming_cmdline || !((char *)data)[0])
- strlcpy(data, config_cmdline, COMMAND_LINE_SIZE);
+ if (overwrite_incoming_cmdline || !cmdline[0])
+ strlcpy(cmdline, config_cmdline, COMMAND_LINE_SIZE);
/* Retrieve command line unless forcing */
- if (read_dt_cmdline) {
+ if (read_dt_cmdline)
p = of_get_flat_dt_prop(node, "bootargs", &l);
- if (p != NULL && l > 0) {
- if (concat_cmdline) {
- strlcat(data, " ", COMMAND_LINE_SIZE);
- strlcat(data, p, min_t(int, (int)l,
- COMMAND_LINE_SIZE));
- } else
- strlcpy(data, p, min_t(int, (int)l,
- COMMAND_LINE_SIZE));
+
+ if (p != NULL && l > 0) {
+ if (concat_cmdline) {
+ int cmdline_len;
+ int copy_len;
+ strlcat(cmdline, " ", COMMAND_LINE_SIZE);
+ cmdline_len = strlen(cmdline);
+ copy_len = COMMAND_LINE_SIZE - cmdline_len - 1;
+ copy_len = min((int)l, copy_len);
+ strncpy(cmdline + cmdline_len, p, copy_len);
+ cmdline[cmdline_len + copy_len] = '\0';
+ } else {
+ strlcpy(cmdline, p, min((int)l, COMMAND_LINE_SIZE));
}
}
source "drivers/staging/android/ion/Kconfig"
+source "drivers/staging/android/fiq_debugger/Kconfig"
+
endif # if ANDROID
endmenu
ccflags-y += -I$(src) # needed for trace events
obj-y += ion/
+obj-$(CONFIG_FIQ_DEBUGGER) += fiq_debugger/
obj-$(CONFIG_ANDROID_BINDER_IPC) += binder.o
obj-$(CONFIG_ASHMEM) += ashmem.o
--- /dev/null
+config FIQ_DEBUGGER
+ bool "FIQ Mode Serial Debugger"
+ default n
+ depends on ARM || ARM64
+ help
+ The FIQ serial debugger can accept commands even when the
+ kernel is unresponsive due to being stuck with interrupts
+ disabled.
+
+config FIQ_DEBUGGER_NO_SLEEP
+ bool "Keep serial debugger active"
+ depends on FIQ_DEBUGGER
+ default n
+ help
+ Enables the serial debugger at boot. Passing
+ fiq_debugger.no_sleep on the kernel commandline will
+ override this config option.
+
+config FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
+ bool "Don't disable wakeup IRQ when debugger is active"
+ depends on FIQ_DEBUGGER
+ default n
+ help
+ Don't disable the wakeup irq when enabling the uart clock. This will
+ cause extra interrupts, but it makes the serial debugger usable with
+ on some MSM radio builds that ignore the uart clock request in power
+ collapse.
+
+config FIQ_DEBUGGER_CONSOLE
+ bool "Console on FIQ Serial Debugger port"
+ depends on FIQ_DEBUGGER
+ default n
+ help
+ Enables a console so that printk messages are displayed on
+ the debugger serial port as the occur.
+
+config FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
+ bool "Put the FIQ debugger into console mode by default"
+ depends on FIQ_DEBUGGER_CONSOLE
+ default n
+ help
+ If enabled, this puts the fiq debugger into console mode by default.
+ Otherwise, the fiq debugger will start out in debug mode.
+
+config FIQ_WATCHDOG
+ bool
+ select FIQ_DEBUGGER
+ select PSTORE_RAM
+ default n
--- /dev/null
+obj-y += fiq_debugger.o
+obj-$(CONFIG_ARM) += fiq_debugger_arm.o
+obj-$(CONFIG_ARM64) += fiq_debugger_arm64.o
+obj-$(CONFIG_FIQ_WATCHDOG) += fiq_watchdog.o
--- /dev/null
+/*
+ * drivers/staging/android/fiq_debugger.c
+ *
+ * Serial Debugger Interface accessed through an FIQ interrupt.
+ *
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#include <stdarg.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/console.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/kernel_stat.h>
+#include <linux/kmsg_dump.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/timer.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/wakelock.h>
+
+#ifdef CONFIG_FIQ_GLUE
+#include <asm/fiq_glue.h>
+#endif
+
+#include <linux/uaccess.h>
+
+#include "fiq_debugger.h"
+#include "fiq_debugger_priv.h"
+#include "fiq_debugger_ringbuf.h"
+
+#define DEBUG_MAX 64
+#define MAX_UNHANDLED_FIQ_COUNT 1000000
+
+#define MAX_FIQ_DEBUGGER_PORTS 4
+
+struct fiq_debugger_state {
+#ifdef CONFIG_FIQ_GLUE
+ struct fiq_glue_handler handler;
+#endif
+ struct fiq_debugger_output output;
+
+ int fiq;
+ int uart_irq;
+ int signal_irq;
+ int wakeup_irq;
+ bool wakeup_irq_no_set_wake;
+ struct clk *clk;
+ struct fiq_debugger_pdata *pdata;
+ struct platform_device *pdev;
+
+ char debug_cmd[DEBUG_MAX];
+ int debug_busy;
+ int debug_abort;
+
+ char debug_buf[DEBUG_MAX];
+ int debug_count;
+
+ bool no_sleep;
+ bool debug_enable;
+ bool ignore_next_wakeup_irq;
+ struct timer_list sleep_timer;
+ spinlock_t sleep_timer_lock;
+ bool uart_enabled;
+ struct wake_lock debugger_wake_lock;
+ bool console_enable;
+ int current_cpu;
+ atomic_t unhandled_fiq_count;
+ bool in_fiq;
+
+ struct work_struct work;
+ spinlock_t work_lock;
+ char work_cmd[DEBUG_MAX];
+
+#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
+ spinlock_t console_lock;
+ struct console console;
+ struct tty_port tty_port;
+ struct fiq_debugger_ringbuf *tty_rbuf;
+ bool syslog_dumping;
+#endif
+
+ unsigned int last_irqs[NR_IRQS];
+ unsigned int last_local_timer_irqs[NR_CPUS];
+};
+
+#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
+struct tty_driver *fiq_tty_driver;
+#endif
+
+#ifdef CONFIG_FIQ_DEBUGGER_NO_SLEEP
+static bool initial_no_sleep = true;
+#else
+static bool initial_no_sleep;
+#endif
+
+#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE
+static bool initial_debug_enable = true;
+static bool initial_console_enable = true;
+#else
+static bool initial_debug_enable;
+static bool initial_console_enable;
+#endif
+
+static bool fiq_kgdb_enable;
+
+module_param_named(no_sleep, initial_no_sleep, bool, 0644);
+module_param_named(debug_enable, initial_debug_enable, bool, 0644);
+module_param_named(console_enable, initial_console_enable, bool, 0644);
+module_param_named(kgdb_enable, fiq_kgdb_enable, bool, 0644);
+
+#ifdef CONFIG_FIQ_DEBUGGER_WAKEUP_IRQ_ALWAYS_ON
+static inline
+void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state) {}
+static inline
+void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state) {}
+#else
+static inline
+void fiq_debugger_enable_wakeup_irq(struct fiq_debugger_state *state)
+{
+ if (state->wakeup_irq < 0)
+ return;
+ enable_irq(state->wakeup_irq);
+ if (!state->wakeup_irq_no_set_wake)
+ enable_irq_wake(state->wakeup_irq);
+}
+static inline
+void fiq_debugger_disable_wakeup_irq(struct fiq_debugger_state *state)
+{
+ if (state->wakeup_irq < 0)
+ return;
+ disable_irq_nosync(state->wakeup_irq);
+ if (!state->wakeup_irq_no_set_wake)
+ disable_irq_wake(state->wakeup_irq);
+}
+#endif
+
+static inline bool fiq_debugger_have_fiq(struct fiq_debugger_state *state)
+{
+ return (state->fiq >= 0);
+}
+
+#ifdef CONFIG_FIQ_GLUE
+static void fiq_debugger_force_irq(struct fiq_debugger_state *state)
+{
+ unsigned int irq = state->signal_irq;
+
+ if (WARN_ON(!fiq_debugger_have_fiq(state)))
+ return;
+ if (state->pdata->force_irq) {
+ state->pdata->force_irq(state->pdev, irq);
+ } else {
+ struct irq_chip *chip = irq_get_chip(irq);
+ if (chip && chip->irq_retrigger)
+ chip->irq_retrigger(irq_get_irq_data(irq));
+ }
+}
+#endif
+
+static void fiq_debugger_uart_enable(struct fiq_debugger_state *state)
+{
+ if (state->clk)
+ clk_enable(state->clk);
+ if (state->pdata->uart_enable)
+ state->pdata->uart_enable(state->pdev);
+}
+
+static void fiq_debugger_uart_disable(struct fiq_debugger_state *state)
+{
+ if (state->pdata->uart_disable)
+ state->pdata->uart_disable(state->pdev);
+ if (state->clk)
+ clk_disable(state->clk);
+}
+
+static void fiq_debugger_uart_flush(struct fiq_debugger_state *state)
+{
+ if (state->pdata->uart_flush)
+ state->pdata->uart_flush(state->pdev);
+}
+
+static void fiq_debugger_putc(struct fiq_debugger_state *state, char c)
+{
+ state->pdata->uart_putc(state->pdev, c);
+}
+
+static void fiq_debugger_puts(struct fiq_debugger_state *state, char *s)
+{
+ unsigned c;
+ while ((c = *s++)) {
+ if (c == '\n')
+ fiq_debugger_putc(state, '\r');
+ fiq_debugger_putc(state, c);
+ }
+}
+
+static void fiq_debugger_prompt(struct fiq_debugger_state *state)
+{
+ fiq_debugger_puts(state, "debug> ");
+}
+
+static void fiq_debugger_dump_kernel_log(struct fiq_debugger_state *state)
+{
+ char buf[512];
+ size_t len;
+ struct kmsg_dumper dumper = { .active = true };
+
+
+ kmsg_dump_rewind_nolock(&dumper);
+ while (kmsg_dump_get_line_nolock(&dumper, true, buf,
+ sizeof(buf) - 1, &len)) {
+ buf[len] = 0;
+ fiq_debugger_puts(state, buf);
+ }
+}
+
+static void fiq_debugger_printf(struct fiq_debugger_output *output,
+ const char *fmt, ...)
+{
+ struct fiq_debugger_state *state;
+ char buf[256];
+ va_list ap;
+
+ state = container_of(output, struct fiq_debugger_state, output);
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+
+ fiq_debugger_puts(state, buf);
+}
+
+/* Safe outside fiq context */
+static int fiq_debugger_printf_nfiq(void *cookie, const char *fmt, ...)
+{
+ struct fiq_debugger_state *state = cookie;
+ char buf[256];
+ va_list ap;
+ unsigned long irq_flags;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, 128, fmt, ap);
+ va_end(ap);
+
+ local_irq_save(irq_flags);
+ fiq_debugger_puts(state, buf);
+ fiq_debugger_uart_flush(state);
+ local_irq_restore(irq_flags);
+ return state->debug_abort;
+}
+
+static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
+{
+ int n;
+ struct irq_desc *desc;
+
+ fiq_debugger_printf(&state->output,
+ "irqnr total since-last status name\n");
+ for_each_irq_desc(n, desc) {
+ struct irqaction *act = desc->action;
+ if (!act && !kstat_irqs(n))
+ continue;
+ fiq_debugger_printf(&state->output, "%5d: %10u %11u %8x %s\n", n,
+ kstat_irqs(n),
+ kstat_irqs(n) - state->last_irqs[n],
+ desc->status_use_accessors,
+ (act && act->name) ? act->name : "???");
+ state->last_irqs[n] = kstat_irqs(n);
+ }
+}
+
+static void fiq_debugger_do_ps(struct fiq_debugger_state *state)
+{
+ struct task_struct *g;
+ struct task_struct *p;
+ unsigned task_state;
+ static const char stat_nam[] = "RSDTtZX";
+
+ fiq_debugger_printf(&state->output, "pid ppid prio task pc\n");
+ read_lock(&tasklist_lock);
+ do_each_thread(g, p) {
+ task_state = p->state ? __ffs(p->state) + 1 : 0;
+ fiq_debugger_printf(&state->output,
+ "%5d %5d %4d ", p->pid, p->parent->pid, p->prio);
+ fiq_debugger_printf(&state->output, "%-13.13s %c", p->comm,
+ task_state >= sizeof(stat_nam) ? '?' : stat_nam[task_state]);
+ if (task_state == TASK_RUNNING)
+ fiq_debugger_printf(&state->output, " running\n");
+ else
+ fiq_debugger_printf(&state->output, " %08lx\n",
+ thread_saved_pc(p));
+ } while_each_thread(g, p);
+ read_unlock(&tasklist_lock);
+}
+
+#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
+static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
+{
+ state->syslog_dumping = true;
+}
+
+static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
+{
+ state->syslog_dumping = false;
+}
+#else
+extern int do_syslog(int type, char __user *bug, int count);
+static void fiq_debugger_begin_syslog_dump(struct fiq_debugger_state *state)
+{
+ do_syslog(5 /* clear */, NULL, 0);
+}
+
+static void fiq_debugger_end_syslog_dump(struct fiq_debugger_state *state)
+{
+ fiq_debugger_dump_kernel_log(state);
+}
+#endif
+
+static void fiq_debugger_do_sysrq(struct fiq_debugger_state *state, char rq)
+{
+ if ((rq == 'g' || rq == 'G') && !fiq_kgdb_enable) {
+ fiq_debugger_printf(&state->output, "sysrq-g blocked\n");
+ return;
+ }
+ fiq_debugger_begin_syslog_dump(state);
+ handle_sysrq(rq);
+ fiq_debugger_end_syslog_dump(state);
+}
+
+#ifdef CONFIG_KGDB
+static void fiq_debugger_do_kgdb(struct fiq_debugger_state *state)
+{
+ if (!fiq_kgdb_enable) {
+ fiq_debugger_printf(&state->output, "kgdb through fiq debugger not enabled\n");
+ return;
+ }
+
+ fiq_debugger_printf(&state->output, "enabling console and triggering kgdb\n");
+ state->console_enable = true;
+ handle_sysrq('g');
+}
+#endif
+
+static void fiq_debugger_schedule_work(struct fiq_debugger_state *state,
+ char *cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&state->work_lock, flags);
+ if (state->work_cmd[0] != '\0') {
+ fiq_debugger_printf(&state->output, "work command processor busy\n");
+ spin_unlock_irqrestore(&state->work_lock, flags);
+ return;
+ }
+
+ strlcpy(state->work_cmd, cmd, sizeof(state->work_cmd));
+ spin_unlock_irqrestore(&state->work_lock, flags);
+
+ schedule_work(&state->work);
+}
+
+static void fiq_debugger_work(struct work_struct *work)
+{
+ struct fiq_debugger_state *state;
+ char work_cmd[DEBUG_MAX];
+ char *cmd;
+ unsigned long flags;
+
+ state = container_of(work, struct fiq_debugger_state, work);
+
+ spin_lock_irqsave(&state->work_lock, flags);
+
+ strlcpy(work_cmd, state->work_cmd, sizeof(work_cmd));
+ state->work_cmd[0] = '\0';
+
+ spin_unlock_irqrestore(&state->work_lock, flags);
+
+ cmd = work_cmd;
+ if (!strncmp(cmd, "reboot", 6)) {
+ cmd += 6;
+ while (*cmd == ' ')
+ cmd++;
+ if (cmd != '\0')
+ kernel_restart(cmd);
+ else
+ kernel_restart(NULL);
+ } else {
+ fiq_debugger_printf(&state->output, "unknown work command '%s'\n",
+ work_cmd);
+ }
+}
+
+/* This function CANNOT be called in FIQ context */
+static void fiq_debugger_irq_exec(struct fiq_debugger_state *state, char *cmd)
+{
+ if (!strcmp(cmd, "ps"))
+ fiq_debugger_do_ps(state);
+ if (!strcmp(cmd, "sysrq"))
+ fiq_debugger_do_sysrq(state, 'h');
+ if (!strncmp(cmd, "sysrq ", 6))
+ fiq_debugger_do_sysrq(state, cmd[6]);
+#ifdef CONFIG_KGDB
+ if (!strcmp(cmd, "kgdb"))
+ fiq_debugger_do_kgdb(state);
+#endif
+ if (!strncmp(cmd, "reboot", 6))
+ fiq_debugger_schedule_work(state, cmd);
+}
+
+static void fiq_debugger_help(struct fiq_debugger_state *state)
+{
+ fiq_debugger_printf(&state->output,
+ "FIQ Debugger commands:\n"
+ " pc PC status\n"
+ " regs Register dump\n"
+ " allregs Extended Register dump\n"
+ " bt Stack trace\n"
+ " reboot [<c>] Reboot with command <c>\n"
+ " reset [<c>] Hard reset with command <c>\n"
+ " irqs Interupt status\n"
+ " kmsg Kernel log\n"
+ " version Kernel version\n");
+ fiq_debugger_printf(&state->output,
+ " sleep Allow sleep while in FIQ\n"
+ " nosleep Disable sleep while in FIQ\n"
+ " console Switch terminal to console\n"
+ " cpu Current CPU\n"
+ " cpu <number> Switch to CPU<number>\n");
+ fiq_debugger_printf(&state->output,
+ " ps Process list\n"
+ " sysrq sysrq options\n"
+ " sysrq <param> Execute sysrq with <param>\n");
+#ifdef CONFIG_KGDB
+ fiq_debugger_printf(&state->output,
+ " kgdb Enter kernel debugger\n");
+#endif
+}
+
+static void fiq_debugger_take_affinity(void *info)
+{
+ struct fiq_debugger_state *state = info;
+ struct cpumask cpumask;
+
+ cpumask_clear(&cpumask);
+ cpumask_set_cpu(get_cpu(), &cpumask);
+
+ irq_set_affinity(state->uart_irq, &cpumask);
+}
+
+static void fiq_debugger_switch_cpu(struct fiq_debugger_state *state, int cpu)
+{
+ if (!fiq_debugger_have_fiq(state))
+ smp_call_function_single(cpu, fiq_debugger_take_affinity, state,
+ false);
+ state->current_cpu = cpu;
+}
+
+static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
+ const char *cmd, const struct pt_regs *regs,
+ void *svc_sp)
+{
+ bool signal_helper = false;
+
+ if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
+ fiq_debugger_help(state);
+ } else if (!strcmp(cmd, "pc")) {
+ fiq_debugger_dump_pc(&state->output, regs);
+ } else if (!strcmp(cmd, "regs")) {
+ fiq_debugger_dump_regs(&state->output, regs);
+ } else if (!strcmp(cmd, "allregs")) {
+ fiq_debugger_dump_allregs(&state->output, regs);
+ } else if (!strcmp(cmd, "bt")) {
+ fiq_debugger_dump_stacktrace(&state->output, regs, 100, svc_sp);
+ } else if (!strncmp(cmd, "reset", 5)) {
+ cmd += 5;
+ while (*cmd == ' ')
+ cmd++;
+ if (*cmd) {
+ char tmp_cmd[32];
+ strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd));
+ machine_restart(tmp_cmd);
+ } else {
+ machine_restart(NULL);
+ }
+ } else if (!strcmp(cmd, "irqs")) {
+ fiq_debugger_dump_irqs(state);
+ } else if (!strcmp(cmd, "kmsg")) {
+ fiq_debugger_dump_kernel_log(state);
+ } else if (!strcmp(cmd, "version")) {
+ fiq_debugger_printf(&state->output, "%s\n", linux_banner);
+ } else if (!strcmp(cmd, "sleep")) {
+ state->no_sleep = false;
+ fiq_debugger_printf(&state->output, "enabling sleep\n");
+ } else if (!strcmp(cmd, "nosleep")) {
+ state->no_sleep = true;
+ fiq_debugger_printf(&state->output, "disabling sleep\n");
+ } else if (!strcmp(cmd, "console")) {
+ fiq_debugger_printf(&state->output, "console mode\n");
+ fiq_debugger_uart_flush(state);
+ state->console_enable = true;
+ } else if (!strcmp(cmd, "cpu")) {
+ fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
+ } else if (!strncmp(cmd, "cpu ", 4)) {
+ unsigned long cpu = 0;
+ if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
+ fiq_debugger_switch_cpu(state, cpu);
+ else
+ fiq_debugger_printf(&state->output, "invalid cpu\n");
+ fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
+ } else {
+ if (state->debug_busy) {
+ fiq_debugger_printf(&state->output,
+ "command processor busy. trying to abort.\n");
+ state->debug_abort = -1;
+ } else {
+ strcpy(state->debug_cmd, cmd);
+ state->debug_busy = 1;
+ }
+
+ return true;
+ }
+ if (!state->console_enable)
+ fiq_debugger_prompt(state);
+
+ return signal_helper;
+}
+
+static void fiq_debugger_sleep_timer_expired(unsigned long data)
+{
+ struct fiq_debugger_state *state = (struct fiq_debugger_state *)data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&state->sleep_timer_lock, flags);
+ if (state->uart_enabled && !state->no_sleep) {
+ if (state->debug_enable && !state->console_enable) {
+ state->debug_enable = false;
+ fiq_debugger_printf_nfiq(state,
+ "suspending fiq debugger\n");
+ }
+ state->ignore_next_wakeup_irq = true;
+ fiq_debugger_uart_disable(state);
+ state->uart_enabled = false;
+ fiq_debugger_enable_wakeup_irq(state);
+ }
+ wake_unlock(&state->debugger_wake_lock);
+ spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
+}
+
+static void fiq_debugger_handle_wakeup(struct fiq_debugger_state *state)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&state->sleep_timer_lock, flags);
+ if (state->wakeup_irq >= 0 && state->ignore_next_wakeup_irq) {
+ state->ignore_next_wakeup_irq = false;
+ } else if (!state->uart_enabled) {
+ wake_lock(&state->debugger_wake_lock);
+ fiq_debugger_uart_enable(state);
+ state->uart_enabled = true;
+ fiq_debugger_disable_wakeup_irq(state);
+ mod_timer(&state->sleep_timer, jiffies + HZ / 2);
+ }
+ spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
+}
+
+static irqreturn_t fiq_debugger_wakeup_irq_handler(int irq, void *dev)
+{
+ struct fiq_debugger_state *state = dev;
+
+ if (!state->no_sleep)
+ fiq_debugger_puts(state, "WAKEUP\n");
+ fiq_debugger_handle_wakeup(state);
+
+ return IRQ_HANDLED;
+}
+
+static
+void fiq_debugger_handle_console_irq_context(struct fiq_debugger_state *state)
+{
+#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
+ if (state->tty_port.ops) {
+ int i;
+ int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
+ for (i = 0; i < count; i++) {
+ int c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
+ tty_insert_flip_char(&state->tty_port, c, TTY_NORMAL);
+ if (!fiq_debugger_ringbuf_consume(state->tty_rbuf, 1))
+ pr_warn("fiq tty failed to consume byte\n");
+ }
+ tty_flip_buffer_push(&state->tty_port);
+ }
+#endif
+}
+
+static void fiq_debugger_handle_irq_context(struct fiq_debugger_state *state)
+{
+ if (!state->no_sleep) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&state->sleep_timer_lock, flags);
+ wake_lock(&state->debugger_wake_lock);
+ mod_timer(&state->sleep_timer, jiffies + HZ * 5);
+ spin_unlock_irqrestore(&state->sleep_timer_lock, flags);
+ }
+ fiq_debugger_handle_console_irq_context(state);
+ if (state->debug_busy) {
+ fiq_debugger_irq_exec(state, state->debug_cmd);
+ if (!state->console_enable)
+ fiq_debugger_prompt(state);
+ state->debug_busy = 0;
+ }
+}
+
+static int fiq_debugger_getc(struct fiq_debugger_state *state)
+{
+ return state->pdata->uart_getc(state->pdev);
+}
+
+static bool fiq_debugger_handle_uart_interrupt(struct fiq_debugger_state *state,
+ int this_cpu, const struct pt_regs *regs, void *svc_sp)
+{
+ int c;
+ static int last_c;
+ int count = 0;
+ bool signal_helper = false;
+
+ if (this_cpu != state->current_cpu) {
+ if (state->in_fiq)
+ return false;
+
+ if (atomic_inc_return(&state->unhandled_fiq_count) !=
+ MAX_UNHANDLED_FIQ_COUNT)
+ return false;
+
+ fiq_debugger_printf(&state->output,
+ "fiq_debugger: cpu %d not responding, "
+ "reverting to cpu %d\n", state->current_cpu,
+ this_cpu);
+
+ atomic_set(&state->unhandled_fiq_count, 0);
+ fiq_debugger_switch_cpu(state, this_cpu);
+ return false;
+ }
+
+ state->in_fiq = true;
+
+ while ((c = fiq_debugger_getc(state)) != FIQ_DEBUGGER_NO_CHAR) {
+ count++;
+ if (!state->debug_enable) {
+ if ((c == 13) || (c == 10)) {
+ state->debug_enable = true;
+ state->debug_count = 0;
+ fiq_debugger_prompt(state);
+ }
+ } else if (c == FIQ_DEBUGGER_BREAK) {
+ state->console_enable = false;
+ fiq_debugger_puts(state, "fiq debugger mode\n");
+ state->debug_count = 0;
+ fiq_debugger_prompt(state);
+#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
+ } else if (state->console_enable && state->tty_rbuf) {
+ fiq_debugger_ringbuf_push(state->tty_rbuf, c);
+ signal_helper = true;
+#endif
+ } else if ((c >= ' ') && (c < 127)) {
+ if (state->debug_count < (DEBUG_MAX - 1)) {
+ state->debug_buf[state->debug_count++] = c;
+ fiq_debugger_putc(state, c);
+ }
+ } else if ((c == 8) || (c == 127)) {
+ if (state->debug_count > 0) {
+ state->debug_count--;
+ fiq_debugger_putc(state, 8);
+ fiq_debugger_putc(state, ' ');
+ fiq_debugger_putc(state, 8);
+ }
+ } else if ((c == 13) || (c == 10)) {
+ if (c == '\r' || (c == '\n' && last_c != '\r')) {
+ fiq_debugger_putc(state, '\r');
+ fiq_debugger_putc(state, '\n');
+ }
+ if (state->debug_count) {
+ state->debug_buf[state->debug_count] = 0;
+ state->debug_count = 0;
+ signal_helper |=
+ fiq_debugger_fiq_exec(state,
+ state->debug_buf,
+ regs, svc_sp);
+ } else {
+ fiq_debugger_prompt(state);
+ }
+ }
+ last_c = c;
+ }
+ if (!state->console_enable)
+ fiq_debugger_uart_flush(state);
+ if (state->pdata->fiq_ack)
+ state->pdata->fiq_ack(state->pdev, state->fiq);
+
+ /* poke sleep timer if necessary */
+ if (state->debug_enable && !state->no_sleep)
+ signal_helper = true;
+
+ atomic_set(&state->unhandled_fiq_count, 0);
+ state->in_fiq = false;
+
+ return signal_helper;
+}
+
+#ifdef CONFIG_FIQ_GLUE
+static void fiq_debugger_fiq(struct fiq_glue_handler *h,
+ const struct pt_regs *regs, void *svc_sp)
+{
+ struct fiq_debugger_state *state =
+ container_of(h, struct fiq_debugger_state, handler);
+ unsigned int this_cpu = THREAD_INFO(svc_sp)->cpu;
+ bool need_irq;
+
+ need_irq = fiq_debugger_handle_uart_interrupt(state, this_cpu, regs,
+ svc_sp);
+ if (need_irq)
+ fiq_debugger_force_irq(state);
+}
+#endif
+
+/*
+ * When not using FIQs, we only use this single interrupt as an entry point.
+ * This just effectively takes over the UART interrupt and does all the work
+ * in this context.
+ */
+static irqreturn_t fiq_debugger_uart_irq(int irq, void *dev)
+{
+ struct fiq_debugger_state *state = dev;
+ bool not_done;
+
+ fiq_debugger_handle_wakeup(state);
+
+ /* handle the debugger irq in regular context */
+ not_done = fiq_debugger_handle_uart_interrupt(state, smp_processor_id(),
+ get_irq_regs(),
+ current_thread_info());
+ if (not_done)
+ fiq_debugger_handle_irq_context(state);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * If FIQs are used, not everything can happen in fiq context.
+ * FIQ handler does what it can and then signals this interrupt to finish the
+ * job in irq context.
+ */
+static irqreturn_t fiq_debugger_signal_irq(int irq, void *dev)
+{
+ struct fiq_debugger_state *state = dev;
+
+ if (state->pdata->force_irq_ack)
+ state->pdata->force_irq_ack(state->pdev, state->signal_irq);
+
+ fiq_debugger_handle_irq_context(state);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_FIQ_GLUE
+static void fiq_debugger_resume(struct fiq_glue_handler *h)
+{
+ struct fiq_debugger_state *state =
+ container_of(h, struct fiq_debugger_state, handler);
+ if (state->pdata->uart_resume)
+ state->pdata->uart_resume(state->pdev);
+}
+#endif
+
+#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
+struct tty_driver *fiq_debugger_console_device(struct console *co, int *index)
+{
+ *index = co->index;
+ return fiq_tty_driver;
+}
+
+static void fiq_debugger_console_write(struct console *co,
+ const char *s, unsigned int count)
+{
+ struct fiq_debugger_state *state;
+ unsigned long flags;
+
+ state = container_of(co, struct fiq_debugger_state, console);
+
+ if (!state->console_enable && !state->syslog_dumping)
+ return;
+
+ fiq_debugger_uart_enable(state);
+ spin_lock_irqsave(&state->console_lock, flags);
+ while (count--) {
+ if (*s == '\n')
+ fiq_debugger_putc(state, '\r');
+ fiq_debugger_putc(state, *s++);
+ }
+ fiq_debugger_uart_flush(state);
+ spin_unlock_irqrestore(&state->console_lock, flags);
+ fiq_debugger_uart_disable(state);
+}
+
+static struct console fiq_debugger_console = {
+ .name = "ttyFIQ",
+ .device = fiq_debugger_console_device,
+ .write = fiq_debugger_console_write,
+ .flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED,
+};
+
+int fiq_tty_open(struct tty_struct *tty, struct file *filp)
+{
+ int line = tty->index;
+ struct fiq_debugger_state **states = tty->driver->driver_state;
+ struct fiq_debugger_state *state = states[line];
+
+ return tty_port_open(&state->tty_port, tty, filp);
+}
+
+void fiq_tty_close(struct tty_struct *tty, struct file *filp)
+{
+ tty_port_close(tty->port, tty, filp);
+}
+
+int fiq_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ int i;
+ int line = tty->index;
+ struct fiq_debugger_state **states = tty->driver->driver_state;
+ struct fiq_debugger_state *state = states[line];
+
+ if (!state->console_enable)
+ return count;
+
+ fiq_debugger_uart_enable(state);
+ spin_lock_irq(&state->console_lock);
+ for (i = 0; i < count; i++)
+ fiq_debugger_putc(state, *buf++);
+ spin_unlock_irq(&state->console_lock);
+ fiq_debugger_uart_disable(state);
+
+ return count;
+}
+
+int fiq_tty_write_room(struct tty_struct *tty)
+{
+ return 16;
+}
+
+#ifdef CONFIG_CONSOLE_POLL
+static int fiq_tty_poll_init(struct tty_driver *driver, int line, char *options)
+{
+ return 0;
+}
+
+static int fiq_tty_poll_get_char(struct tty_driver *driver, int line)
+{
+ struct fiq_debugger_state **states = driver->driver_state;
+ struct fiq_debugger_state *state = states[line];
+ int c = NO_POLL_CHAR;
+
+ fiq_debugger_uart_enable(state);
+ if (fiq_debugger_have_fiq(state)) {
+ int count = fiq_debugger_ringbuf_level(state->tty_rbuf);
+ if (count > 0) {
+ c = fiq_debugger_ringbuf_peek(state->tty_rbuf, 0);
+ fiq_debugger_ringbuf_consume(state->tty_rbuf, 1);
+ }
+ } else {
+ c = fiq_debugger_getc(state);
+ if (c == FIQ_DEBUGGER_NO_CHAR)
+ c = NO_POLL_CHAR;
+ }
+ fiq_debugger_uart_disable(state);
+
+ return c;
+}
+
+static void fiq_tty_poll_put_char(struct tty_driver *driver, int line, char ch)
+{
+ struct fiq_debugger_state **states = driver->driver_state;
+ struct fiq_debugger_state *state = states[line];
+ fiq_debugger_uart_enable(state);
+ fiq_debugger_putc(state, ch);
+ fiq_debugger_uart_disable(state);
+}
+#endif
+
+static const struct tty_port_operations fiq_tty_port_ops;
+
+static const struct tty_operations fiq_tty_driver_ops = {
+ .write = fiq_tty_write,
+ .write_room = fiq_tty_write_room,
+ .open = fiq_tty_open,
+ .close = fiq_tty_close,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_init = fiq_tty_poll_init,
+ .poll_get_char = fiq_tty_poll_get_char,
+ .poll_put_char = fiq_tty_poll_put_char,
+#endif
+};
+
+static int fiq_debugger_tty_init(void)
+{
+ int ret;
+ struct fiq_debugger_state **states = NULL;
+
+ states = kzalloc(sizeof(*states) * MAX_FIQ_DEBUGGER_PORTS, GFP_KERNEL);
+ if (!states) {
+ pr_err("Failed to allocate fiq debugger state structres\n");
+ return -ENOMEM;
+ }
+
+ fiq_tty_driver = alloc_tty_driver(MAX_FIQ_DEBUGGER_PORTS);
+ if (!fiq_tty_driver) {
+ pr_err("Failed to allocate fiq debugger tty\n");
+ ret = -ENOMEM;
+ goto err_free_state;
+ }
+
+ fiq_tty_driver->owner = THIS_MODULE;
+ fiq_tty_driver->driver_name = "fiq-debugger";
+ fiq_tty_driver->name = "ttyFIQ";
+ fiq_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ fiq_tty_driver->subtype = SERIAL_TYPE_NORMAL;
+ fiq_tty_driver->init_termios = tty_std_termios;
+ fiq_tty_driver->flags = TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV;
+ fiq_tty_driver->driver_state = states;
+
+ fiq_tty_driver->init_termios.c_cflag =
+ B115200 | CS8 | CREAD | HUPCL | CLOCAL;
+ fiq_tty_driver->init_termios.c_ispeed = 115200;
+ fiq_tty_driver->init_termios.c_ospeed = 115200;
+
+ tty_set_operations(fiq_tty_driver, &fiq_tty_driver_ops);
+
+ ret = tty_register_driver(fiq_tty_driver);
+ if (ret) {
+ pr_err("Failed to register fiq tty: %d\n", ret);
+ goto err_free_tty;
+ }
+
+ pr_info("Registered FIQ tty driver\n");
+ return 0;
+
+err_free_tty:
+ put_tty_driver(fiq_tty_driver);
+ fiq_tty_driver = NULL;
+err_free_state:
+ kfree(states);
+ return ret;
+}
+
+static int fiq_debugger_tty_init_one(struct fiq_debugger_state *state)
+{
+ int ret;
+ struct device *tty_dev;
+ struct fiq_debugger_state **states = fiq_tty_driver->driver_state;
+
+ states[state->pdev->id] = state;
+
+ state->tty_rbuf = fiq_debugger_ringbuf_alloc(1024);
+ if (!state->tty_rbuf) {
+ pr_err("Failed to allocate fiq debugger ringbuf\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ tty_port_init(&state->tty_port);
+ state->tty_port.ops = &fiq_tty_port_ops;
+
+ tty_dev = tty_port_register_device(&state->tty_port, fiq_tty_driver,
+ state->pdev->id, &state->pdev->dev);
+ if (IS_ERR(tty_dev)) {
+ pr_err("Failed to register fiq debugger tty device\n");
+ ret = PTR_ERR(tty_dev);
+ goto err;
+ }
+
+ device_set_wakeup_capable(tty_dev, 1);
+
+ pr_info("Registered fiq debugger ttyFIQ%d\n", state->pdev->id);
+
+ return 0;
+
+err:
+ fiq_debugger_ringbuf_free(state->tty_rbuf);
+ state->tty_rbuf = NULL;
+ return ret;
+}
+#endif
+
+static int fiq_debugger_dev_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct fiq_debugger_state *state = platform_get_drvdata(pdev);
+
+ if (state->pdata->uart_dev_suspend)
+ return state->pdata->uart_dev_suspend(pdev);
+ return 0;
+}
+
+static int fiq_debugger_dev_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct fiq_debugger_state *state = platform_get_drvdata(pdev);
+
+ if (state->pdata->uart_dev_resume)
+ return state->pdata->uart_dev_resume(pdev);
+ return 0;
+}
+
+static int fiq_debugger_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct fiq_debugger_pdata *pdata = dev_get_platdata(&pdev->dev);
+ struct fiq_debugger_state *state;
+ int fiq;
+ int uart_irq;
+
+ if (pdev->id >= MAX_FIQ_DEBUGGER_PORTS)
+ return -EINVAL;
+
+ if (!pdata->uart_getc || !pdata->uart_putc)
+ return -EINVAL;
+ if ((pdata->uart_enable && !pdata->uart_disable) ||
+ (!pdata->uart_enable && pdata->uart_disable))
+ return -EINVAL;
+
+ fiq = platform_get_irq_byname(pdev, "fiq");
+ uart_irq = platform_get_irq_byname(pdev, "uart_irq");
+
+ /* uart_irq mode and fiq mode are mutually exclusive, but one of them
+ * is required */
+ if ((uart_irq < 0 && fiq < 0) || (uart_irq >= 0 && fiq >= 0))
+ return -EINVAL;
+ if (fiq >= 0 && !pdata->fiq_enable)
+ return -EINVAL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ state->output.printf = fiq_debugger_printf;
+ setup_timer(&state->sleep_timer, fiq_debugger_sleep_timer_expired,
+ (unsigned long)state);
+ state->pdata = pdata;
+ state->pdev = pdev;
+ state->no_sleep = initial_no_sleep;
+ state->debug_enable = initial_debug_enable;
+ state->console_enable = initial_console_enable;
+
+ state->fiq = fiq;
+ state->uart_irq = uart_irq;
+ state->signal_irq = platform_get_irq_byname(pdev, "signal");
+ state->wakeup_irq = platform_get_irq_byname(pdev, "wakeup");
+
+ INIT_WORK(&state->work, fiq_debugger_work);
+ spin_lock_init(&state->work_lock);
+
+ platform_set_drvdata(pdev, state);
+
+ spin_lock_init(&state->sleep_timer_lock);
+
+ if (state->wakeup_irq < 0 && fiq_debugger_have_fiq(state))
+ state->no_sleep = true;
+ state->ignore_next_wakeup_irq = !state->no_sleep;
+
+ wake_lock_init(&state->debugger_wake_lock,
+ WAKE_LOCK_SUSPEND, "serial-debug");
+
+ state->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(state->clk))
+ state->clk = NULL;
+
+ /* do not call pdata->uart_enable here since uart_init may still
+ * need to do some initialization before uart_enable can work.
+ * So, only try to manage the clock during init.
+ */
+ if (state->clk)
+ clk_enable(state->clk);
+
+ if (pdata->uart_init) {
+ ret = pdata->uart_init(pdev);
+ if (ret)
+ goto err_uart_init;
+ }
+
+ fiq_debugger_printf_nfiq(state,
+ "<hit enter %sto activate fiq debugger>\n",
+ state->no_sleep ? "" : "twice ");
+
+#ifdef CONFIG_FIQ_GLUE
+ if (fiq_debugger_have_fiq(state)) {
+ state->handler.fiq = fiq_debugger_fiq;
+ state->handler.resume = fiq_debugger_resume;
+ ret = fiq_glue_register_handler(&state->handler);
+ if (ret) {
+ pr_err("%s: could not install fiq handler\n", __func__);
+ goto err_register_irq;
+ }
+
+ pdata->fiq_enable(pdev, state->fiq, 1);
+ } else
+#endif
+ {
+ ret = request_irq(state->uart_irq, fiq_debugger_uart_irq,
+ IRQF_NO_SUSPEND, "debug", state);
+ if (ret) {
+ pr_err("%s: could not install irq handler\n", __func__);
+ goto err_register_irq;
+ }
+
+ /* for irq-only mode, we want this irq to wake us up, if it
+ * can.
+ */
+ enable_irq_wake(state->uart_irq);
+ }
+
+ if (state->clk)
+ clk_disable(state->clk);
+
+ if (state->signal_irq >= 0) {
+ ret = request_irq(state->signal_irq, fiq_debugger_signal_irq,
+ IRQF_TRIGGER_RISING, "debug-signal", state);
+ if (ret)
+ pr_err("serial_debugger: could not install signal_irq");
+ }
+
+ if (state->wakeup_irq >= 0) {
+ ret = request_irq(state->wakeup_irq,
+ fiq_debugger_wakeup_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_DISABLED,
+ "debug-wakeup", state);
+ if (ret) {
+ pr_err("serial_debugger: "
+ "could not install wakeup irq\n");
+ state->wakeup_irq = -1;
+ } else {
+ ret = enable_irq_wake(state->wakeup_irq);
+ if (ret) {
+ pr_err("serial_debugger: "
+ "could not enable wakeup\n");
+ state->wakeup_irq_no_set_wake = true;
+ }
+ }
+ }
+ if (state->no_sleep)
+ fiq_debugger_handle_wakeup(state);
+
+#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
+ spin_lock_init(&state->console_lock);
+ state->console = fiq_debugger_console;
+ state->console.index = pdev->id;
+ if (!console_set_on_cmdline)
+ add_preferred_console(state->console.name,
+ state->console.index, NULL);
+ register_console(&state->console);
+ fiq_debugger_tty_init_one(state);
+#endif
+ return 0;
+
+err_register_irq:
+ if (pdata->uart_free)
+ pdata->uart_free(pdev);
+err_uart_init:
+ if (state->clk)
+ clk_disable(state->clk);
+ if (state->clk)
+ clk_put(state->clk);
+ wake_lock_destroy(&state->debugger_wake_lock);
+ platform_set_drvdata(pdev, NULL);
+ kfree(state);
+ return ret;
+}
+
+static const struct dev_pm_ops fiq_debugger_dev_pm_ops = {
+ .suspend = fiq_debugger_dev_suspend,
+ .resume = fiq_debugger_dev_resume,
+};
+
+static struct platform_driver fiq_debugger_driver = {
+ .probe = fiq_debugger_probe,
+ .driver = {
+ .name = "fiq_debugger",
+ .pm = &fiq_debugger_dev_pm_ops,
+ },
+};
+
+static int __init fiq_debugger_init(void)
+{
+#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)
+ fiq_debugger_tty_init();
+#endif
+ return platform_driver_register(&fiq_debugger_driver);
+}
+
+postcore_initcall(fiq_debugger_init);
--- /dev/null
+/*
+ * drivers/staging/android/fiq_debugger/fiq_debugger.h
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef _ARCH_ARM_MACH_TEGRA_FIQ_DEBUGGER_H_
+#define _ARCH_ARM_MACH_TEGRA_FIQ_DEBUGGER_H_
+
+#include <linux/serial_core.h>
+
+#define FIQ_DEBUGGER_NO_CHAR NO_POLL_CHAR
+#define FIQ_DEBUGGER_BREAK 0x00ff0100
+
+#define FIQ_DEBUGGER_FIQ_IRQ_NAME "fiq"
+#define FIQ_DEBUGGER_SIGNAL_IRQ_NAME "signal"
+#define FIQ_DEBUGGER_WAKEUP_IRQ_NAME "wakeup"
+
+/**
+ * struct fiq_debugger_pdata - fiq debugger platform data
+ * @uart_resume: used to restore uart state right before enabling
+ * the fiq.
+ * @uart_enable: Do the work necessary to communicate with the uart
+ * hw (enable clocks, etc.). This must be ref-counted.
+ * @uart_disable: Do the work necessary to disable the uart hw
+ * (disable clocks, etc.). This must be ref-counted.
+ * @uart_dev_suspend: called during PM suspend, generally not needed
+ * for real fiq mode debugger.
+ * @uart_dev_resume: called during PM resume, generally not needed
+ * for real fiq mode debugger.
+ */
+struct fiq_debugger_pdata {
+ int (*uart_init)(struct platform_device *pdev);
+ void (*uart_free)(struct platform_device *pdev);
+ int (*uart_resume)(struct platform_device *pdev);
+ int (*uart_getc)(struct platform_device *pdev);
+ void (*uart_putc)(struct platform_device *pdev, unsigned int c);
+ void (*uart_flush)(struct platform_device *pdev);
+ void (*uart_enable)(struct platform_device *pdev);
+ void (*uart_disable)(struct platform_device *pdev);
+
+ int (*uart_dev_suspend)(struct platform_device *pdev);
+ int (*uart_dev_resume)(struct platform_device *pdev);
+
+ void (*fiq_enable)(struct platform_device *pdev, unsigned int fiq,
+ bool enable);
+ void (*fiq_ack)(struct platform_device *pdev, unsigned int fiq);
+
+ void (*force_irq)(struct platform_device *pdev, unsigned int irq);
+ void (*force_irq_ack)(struct platform_device *pdev, unsigned int irq);
+};
+
+#endif
--- /dev/null
+/*
+ * Copyright (C) 2014 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/ptrace.h>
+#include <linux/uaccess.h>
+
+#include <asm/stacktrace.h>
+
+#include "fiq_debugger_priv.h"
+
+static char *mode_name(unsigned cpsr)
+{
+ switch (cpsr & MODE_MASK) {
+ case USR_MODE: return "USR";
+ case FIQ_MODE: return "FIQ";
+ case IRQ_MODE: return "IRQ";
+ case SVC_MODE: return "SVC";
+ case ABT_MODE: return "ABT";
+ case UND_MODE: return "UND";
+ case SYSTEM_MODE: return "SYS";
+ default: return "???";
+ }
+}
+
+void fiq_debugger_dump_pc(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+ output->printf(output, " pc %08x cpsr %08x mode %s\n",
+ regs->ARM_pc, regs->ARM_cpsr, mode_name(regs->ARM_cpsr));
+}
+
+void fiq_debugger_dump_regs(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+ output->printf(output,
+ " r0 %08x r1 %08x r2 %08x r3 %08x\n",
+ regs->ARM_r0, regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
+ output->printf(output,
+ " r4 %08x r5 %08x r6 %08x r7 %08x\n",
+ regs->ARM_r4, regs->ARM_r5, regs->ARM_r6, regs->ARM_r7);
+ output->printf(output,
+ " r8 %08x r9 %08x r10 %08x r11 %08x mode %s\n",
+ regs->ARM_r8, regs->ARM_r9, regs->ARM_r10, regs->ARM_fp,
+ mode_name(regs->ARM_cpsr));
+ output->printf(output,
+ " ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
+ regs->ARM_ip, regs->ARM_sp, regs->ARM_lr, regs->ARM_pc,
+ regs->ARM_cpsr);
+}
+
+struct mode_regs {
+ unsigned long sp_svc;
+ unsigned long lr_svc;
+ unsigned long spsr_svc;
+
+ unsigned long sp_abt;
+ unsigned long lr_abt;
+ unsigned long spsr_abt;
+
+ unsigned long sp_und;
+ unsigned long lr_und;
+ unsigned long spsr_und;
+
+ unsigned long sp_irq;
+ unsigned long lr_irq;
+ unsigned long spsr_irq;
+
+ unsigned long r8_fiq;
+ unsigned long r9_fiq;
+ unsigned long r10_fiq;
+ unsigned long r11_fiq;
+ unsigned long r12_fiq;
+ unsigned long sp_fiq;
+ unsigned long lr_fiq;
+ unsigned long spsr_fiq;
+};
+
+static void __naked get_mode_regs(struct mode_regs *regs)
+{
+ asm volatile (
+ "mrs r1, cpsr\n"
+ "msr cpsr_c, #0xd3 @(SVC_MODE | PSR_I_BIT | PSR_F_BIT)\n"
+ "stmia r0!, {r13 - r14}\n"
+ "mrs r2, spsr\n"
+ "msr cpsr_c, #0xd7 @(ABT_MODE | PSR_I_BIT | PSR_F_BIT)\n"
+ "stmia r0!, {r2, r13 - r14}\n"
+ "mrs r2, spsr\n"
+ "msr cpsr_c, #0xdb @(UND_MODE | PSR_I_BIT | PSR_F_BIT)\n"
+ "stmia r0!, {r2, r13 - r14}\n"
+ "mrs r2, spsr\n"
+ "msr cpsr_c, #0xd2 @(IRQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
+ "stmia r0!, {r2, r13 - r14}\n"
+ "mrs r2, spsr\n"
+ "msr cpsr_c, #0xd1 @(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
+ "stmia r0!, {r2, r8 - r14}\n"
+ "mrs r2, spsr\n"
+ "stmia r0!, {r2}\n"
+ "msr cpsr_c, r1\n"
+ "bx lr\n");
+}
+
+
+void fiq_debugger_dump_allregs(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+ struct mode_regs mode_regs;
+ unsigned long mode = regs->ARM_cpsr & MODE_MASK;
+
+ fiq_debugger_dump_regs(output, regs);
+ get_mode_regs(&mode_regs);
+
+ output->printf(output,
+ "%csvc: sp %08x lr %08x spsr %08x\n",
+ mode == SVC_MODE ? '*' : ' ',
+ mode_regs.sp_svc, mode_regs.lr_svc, mode_regs.spsr_svc);
+ output->printf(output,
+ "%cabt: sp %08x lr %08x spsr %08x\n",
+ mode == ABT_MODE ? '*' : ' ',
+ mode_regs.sp_abt, mode_regs.lr_abt, mode_regs.spsr_abt);
+ output->printf(output,
+ "%cund: sp %08x lr %08x spsr %08x\n",
+ mode == UND_MODE ? '*' : ' ',
+ mode_regs.sp_und, mode_regs.lr_und, mode_regs.spsr_und);
+ output->printf(output,
+ "%cirq: sp %08x lr %08x spsr %08x\n",
+ mode == IRQ_MODE ? '*' : ' ',
+ mode_regs.sp_irq, mode_regs.lr_irq, mode_regs.spsr_irq);
+ output->printf(output,
+ "%cfiq: r8 %08x r9 %08x r10 %08x r11 %08x r12 %08x\n",
+ mode == FIQ_MODE ? '*' : ' ',
+ mode_regs.r8_fiq, mode_regs.r9_fiq, mode_regs.r10_fiq,
+ mode_regs.r11_fiq, mode_regs.r12_fiq);
+ output->printf(output,
+ " fiq: sp %08x lr %08x spsr %08x\n",
+ mode_regs.sp_fiq, mode_regs.lr_fiq, mode_regs.spsr_fiq);
+}
+
+struct stacktrace_state {
+ struct fiq_debugger_output *output;
+ unsigned int depth;
+};
+
+static int report_trace(struct stackframe *frame, void *d)
+{
+ struct stacktrace_state *sts = d;
+
+ if (sts->depth) {
+ sts->output->printf(sts->output,
+ " pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
+ frame->pc, frame->pc, frame->lr, frame->lr,
+ frame->sp, frame->fp);
+ sts->depth--;
+ return 0;
+ }
+ sts->output->printf(sts->output, " ...\n");
+
+ return sts->depth == 0;
+}
+
+struct frame_tail {
+ struct frame_tail *fp;
+ unsigned long sp;
+ unsigned long lr;
+} __attribute__((packed));
+
+static struct frame_tail *user_backtrace(struct fiq_debugger_output *output,
+ struct frame_tail *tail)
+{
+ struct frame_tail buftail[2];
+
+ /* Also check accessibility of one struct frame_tail beyond */
+ if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) {
+ output->printf(output, " invalid frame pointer %p\n",
+ tail);
+ return NULL;
+ }
+ if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) {
+ output->printf(output,
+ " failed to copy frame pointer %p\n", tail);
+ return NULL;
+ }
+
+ output->printf(output, " %p\n", buftail[0].lr);
+
+ /* frame pointers should strictly progress back up the stack
+ * (towards higher addresses) */
+ if (tail >= buftail[0].fp)
+ return NULL;
+
+ return buftail[0].fp-1;
+}
+
+void fiq_debugger_dump_stacktrace(struct fiq_debugger_output *output,
+ const struct pt_regs *regs, unsigned int depth, void *ssp)
+{
+ struct frame_tail *tail;
+ struct thread_info *real_thread_info = THREAD_INFO(ssp);
+ struct stacktrace_state sts;
+
+ sts.depth = depth;
+ sts.output = output;
+ *current_thread_info() = *real_thread_info;
+
+ if (!current)
+ output->printf(output, "current NULL\n");
+ else
+ output->printf(output, "pid: %d comm: %s\n",
+ current->pid, current->comm);
+ fiq_debugger_dump_regs(output, regs);
+
+ if (!user_mode(regs)) {
+ struct stackframe frame;
+ frame.fp = regs->ARM_fp;
+ frame.sp = regs->ARM_sp;
+ frame.lr = regs->ARM_lr;
+ frame.pc = regs->ARM_pc;
+ output->printf(output,
+ " pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
+ regs->ARM_pc, regs->ARM_pc, regs->ARM_lr, regs->ARM_lr,
+ regs->ARM_sp, regs->ARM_fp);
+ walk_stackframe(&frame, report_trace, &sts);
+ return;
+ }
+
+ tail = ((struct frame_tail *) regs->ARM_fp) - 1;
+ while (depth-- && tail && !((unsigned long) tail & 3))
+ tail = user_backtrace(output, tail);
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/ptrace.h>
+#include <asm/stacktrace.h>
+
+#include "fiq_debugger_priv.h"
+
+static char *mode_name(const struct pt_regs *regs)
+{
+ if (compat_user_mode(regs)) {
+ return "USR";
+ } else {
+ switch (processor_mode(regs)) {
+ case PSR_MODE_EL0t: return "EL0t";
+ case PSR_MODE_EL1t: return "EL1t";
+ case PSR_MODE_EL1h: return "EL1h";
+ case PSR_MODE_EL2t: return "EL2t";
+ case PSR_MODE_EL2h: return "EL2h";
+ default: return "???";
+ }
+ }
+}
+
+void fiq_debugger_dump_pc(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+ output->printf(output, " pc %016lx cpsr %08lx mode %s\n",
+ regs->pc, regs->pstate, mode_name(regs));
+}
+
+void fiq_debugger_dump_regs_aarch32(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+ output->printf(output, " r0 %08x r1 %08x r2 %08x r3 %08x\n",
+ regs->compat_usr(0), regs->compat_usr(1),
+ regs->compat_usr(2), regs->compat_usr(3));
+ output->printf(output, " r4 %08x r5 %08x r6 %08x r7 %08x\n",
+ regs->compat_usr(4), regs->compat_usr(5),
+ regs->compat_usr(6), regs->compat_usr(7));
+ output->printf(output, " r8 %08x r9 %08x r10 %08x r11 %08x\n",
+ regs->compat_usr(8), regs->compat_usr(9),
+ regs->compat_usr(10), regs->compat_usr(11));
+ output->printf(output, " ip %08x sp %08x lr %08x pc %08x\n",
+ regs->compat_usr(12), regs->compat_sp,
+ regs->compat_lr, regs->pc);
+ output->printf(output, " cpsr %08x (%s)\n",
+ regs->pstate, mode_name(regs));
+}
+
+void fiq_debugger_dump_regs_aarch64(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+
+ output->printf(output, " x0 %016lx x1 %016lx\n",
+ regs->regs[0], regs->regs[1]);
+ output->printf(output, " x2 %016lx x3 %016lx\n",
+ regs->regs[2], regs->regs[3]);
+ output->printf(output, " x4 %016lx x5 %016lx\n",
+ regs->regs[4], regs->regs[5]);
+ output->printf(output, " x6 %016lx x7 %016lx\n",
+ regs->regs[6], regs->regs[7]);
+ output->printf(output, " x8 %016lx x9 %016lx\n",
+ regs->regs[8], regs->regs[9]);
+ output->printf(output, " x10 %016lx x11 %016lx\n",
+ regs->regs[10], regs->regs[11]);
+ output->printf(output, " x12 %016lx x13 %016lx\n",
+ regs->regs[12], regs->regs[13]);
+ output->printf(output, " x14 %016lx x15 %016lx\n",
+ regs->regs[14], regs->regs[15]);
+ output->printf(output, " x16 %016lx x17 %016lx\n",
+ regs->regs[16], regs->regs[17]);
+ output->printf(output, " x18 %016lx x19 %016lx\n",
+ regs->regs[18], regs->regs[19]);
+ output->printf(output, " x20 %016lx x21 %016lx\n",
+ regs->regs[20], regs->regs[21]);
+ output->printf(output, " x22 %016lx x23 %016lx\n",
+ regs->regs[22], regs->regs[23]);
+ output->printf(output, " x24 %016lx x25 %016lx\n",
+ regs->regs[24], regs->regs[25]);
+ output->printf(output, " x26 %016lx x27 %016lx\n",
+ regs->regs[26], regs->regs[27]);
+ output->printf(output, " x28 %016lx x29 %016lx\n",
+ regs->regs[28], regs->regs[29]);
+ output->printf(output, " x30 %016lx sp %016lx\n",
+ regs->regs[30], regs->sp);
+ output->printf(output, " pc %016lx cpsr %08x (%s)\n",
+ regs->pc, regs->pstate, mode_name(regs));
+}
+
+void fiq_debugger_dump_regs(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+ if (compat_user_mode(regs))
+ fiq_debugger_dump_regs_aarch32(output, regs);
+ else
+ fiq_debugger_dump_regs_aarch64(output, regs);
+}
+
+#define READ_SPECIAL_REG(x) ({ \
+ u64 val; \
+ asm volatile ("mrs %0, " # x : "=r"(val)); \
+ val; \
+})
+
+void fiq_debugger_dump_allregs(struct fiq_debugger_output *output,
+ const struct pt_regs *regs)
+{
+ u32 pstate = READ_SPECIAL_REG(CurrentEl);
+ bool in_el2 = (pstate & PSR_MODE_MASK) >= PSR_MODE_EL2t;
+
+ fiq_debugger_dump_regs(output, regs);
+
+ output->printf(output, " sp_el0 %016lx\n",
+ READ_SPECIAL_REG(sp_el0));
+
+ if (in_el2)
+ output->printf(output, " sp_el1 %016lx\n",
+ READ_SPECIAL_REG(sp_el1));
+
+ output->printf(output, " elr_el1 %016lx\n",
+ READ_SPECIAL_REG(elr_el1));
+
+ output->printf(output, " spsr_el1 %08lx\n",
+ READ_SPECIAL_REG(spsr_el1));
+
+ if (in_el2) {
+ output->printf(output, " spsr_irq %08lx\n",
+ READ_SPECIAL_REG(spsr_irq));
+ output->printf(output, " spsr_abt %08lx\n",
+ READ_SPECIAL_REG(spsr_abt));
+ output->printf(output, " spsr_und %08lx\n",
+ READ_SPECIAL_REG(spsr_und));
+ output->printf(output, " spsr_fiq %08lx\n",
+ READ_SPECIAL_REG(spsr_fiq));
+ output->printf(output, " spsr_el2 %08lx\n",
+ READ_SPECIAL_REG(elr_el2));
+ output->printf(output, " spsr_el2 %08lx\n",
+ READ_SPECIAL_REG(spsr_el2));
+ }
+}
+
+struct stacktrace_state {
+ struct fiq_debugger_output *output;
+ unsigned int depth;
+};
+
+static int report_trace(struct stackframe *frame, void *d)
+{
+ struct stacktrace_state *sts = d;
+
+ if (sts->depth) {
+ sts->output->printf(sts->output, "%pF:\n", frame->pc);
+ sts->output->printf(sts->output,
+ " pc %016lx sp %016lx fp %016lx\n",
+ frame->pc, frame->sp, frame->fp);
+ sts->depth--;
+ return 0;
+ }
+ sts->output->printf(sts->output, " ...\n");
+
+ return sts->depth == 0;
+}
+
+void fiq_debugger_dump_stacktrace(struct fiq_debugger_output *output,
+ const struct pt_regs *regs, unsigned int depth, void *ssp)
+{
+ struct thread_info *real_thread_info = THREAD_INFO(ssp);
+ struct stacktrace_state sts;
+
+ sts.depth = depth;
+ sts.output = output;
+ *current_thread_info() = *real_thread_info;
+
+ if (!current)
+ output->printf(output, "current NULL\n");
+ else
+ output->printf(output, "pid: %d comm: %s\n",
+ current->pid, current->comm);
+ fiq_debugger_dump_regs(output, regs);
+
+ if (!user_mode(regs)) {
+ struct stackframe frame;
+ frame.fp = regs->regs[29];
+ frame.sp = regs->sp;
+ frame.pc = regs->pc;
+ output->printf(output, "\n");
+ walk_stackframe(&frame, report_trace, &sts);
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 Google, Inc.
+ * Author: Colin Cross <ccross@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef _FIQ_DEBUGGER_PRIV_H_
+#define _FIQ_DEBUGGER_PRIV_H_
+
+#define THREAD_INFO(sp) ((struct thread_info *) \
+ ((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
+
+struct fiq_debugger_output {
+ void (*printf)(struct fiq_debugger_output *output, const char *fmt, ...);
+};
+
+struct pt_regs;
+
+void fiq_debugger_dump_pc(struct fiq_debugger_output *output,
+ const struct pt_regs *regs);
+void fiq_debugger_dump_regs(struct fiq_debugger_output *output,
+ const struct pt_regs *regs);
+void fiq_debugger_dump_allregs(struct fiq_debugger_output *output,
+ const struct pt_regs *regs);
+void fiq_debugger_dump_stacktrace(struct fiq_debugger_output *output,
+ const struct pt_regs *regs, unsigned int depth, void *ssp);
+
+#endif
--- /dev/null
+/*
+ * drivers/staging/android/fiq_debugger/fiq_debugger_ringbuf.h
+ *
+ * simple lockless ringbuffer
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+struct fiq_debugger_ringbuf {
+ int len;
+ int head;
+ int tail;
+ u8 buf[];
+};
+
+
+static inline struct fiq_debugger_ringbuf *fiq_debugger_ringbuf_alloc(int len)
+{
+ struct fiq_debugger_ringbuf *rbuf;
+
+ rbuf = kzalloc(sizeof(*rbuf) + len, GFP_KERNEL);
+ if (rbuf == NULL)
+ return NULL;
+
+ rbuf->len = len;
+ rbuf->head = 0;
+ rbuf->tail = 0;
+ smp_mb();
+
+ return rbuf;
+}
+
+static inline void fiq_debugger_ringbuf_free(struct fiq_debugger_ringbuf *rbuf)
+{
+ kfree(rbuf);
+}
+
+static inline int fiq_debugger_ringbuf_level(struct fiq_debugger_ringbuf *rbuf)
+{
+ int level = rbuf->head - rbuf->tail;
+
+ if (level < 0)
+ level = rbuf->len + level;
+
+ return level;
+}
+
+static inline int fiq_debugger_ringbuf_room(struct fiq_debugger_ringbuf *rbuf)
+{
+ return rbuf->len - fiq_debugger_ringbuf_level(rbuf) - 1;
+}
+
+static inline u8
+fiq_debugger_ringbuf_peek(struct fiq_debugger_ringbuf *rbuf, int i)
+{
+ return rbuf->buf[(rbuf->tail + i) % rbuf->len];
+}
+
+static inline int
+fiq_debugger_ringbuf_consume(struct fiq_debugger_ringbuf *rbuf, int count)
+{
+ count = min(count, fiq_debugger_ringbuf_level(rbuf));
+
+ rbuf->tail = (rbuf->tail + count) % rbuf->len;
+ smp_mb();
+
+ return count;
+}
+
+static inline int
+fiq_debugger_ringbuf_push(struct fiq_debugger_ringbuf *rbuf, u8 datum)
+{
+ if (fiq_debugger_ringbuf_room(rbuf) == 0)
+ return 0;
+
+ rbuf->buf[rbuf->head] = datum;
+ smp_mb();
+ rbuf->head = (rbuf->head + 1) % rbuf->len;
+ smp_mb();
+
+ return 1;
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/pstore_ram.h>
+
+#include "fiq_watchdog.h"
+#include "fiq_debugger_priv.h"
+
+static DEFINE_RAW_SPINLOCK(fiq_watchdog_lock);
+
+static void fiq_watchdog_printf(struct fiq_debugger_output *output,
+ const char *fmt, ...)
+{
+ char buf[256];
+ va_list ap;
+ int len;
+
+ va_start(ap, fmt);
+ len = vscnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+
+ ramoops_console_write_buf(buf, len);
+}
+
+struct fiq_debugger_output fiq_watchdog_output = {
+ .printf = fiq_watchdog_printf,
+};
+
+void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp)
+{
+ char msg[24];
+ int len;
+
+ raw_spin_lock(&fiq_watchdog_lock);
+
+ len = scnprintf(msg, sizeof(msg), "watchdog fiq cpu %d\n",
+ THREAD_INFO(svc_sp)->cpu);
+ ramoops_console_write_buf(msg, len);
+
+ fiq_debugger_dump_stacktrace(&fiq_watchdog_output, regs, 100, svc_sp);
+
+ raw_spin_unlock(&fiq_watchdog_lock);
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef _FIQ_WATCHDOG_H_
+#define _FIQ_WATCHDOG_H_
+
+void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp);
+
+#endif
struct adf_event_refcount *refcount =
container_of(node, struct adf_event_refcount,
node);
+ rb_erase(&refcount->node, &obj->event_refcount);
kfree(refcount);
node = rb_first(&obj->event_refcount);
}
unsigned long pfn = PFN_DOWN(pdata->base);
struct page *page = pfn_to_page(pfn);
struct sg_table *table;
- int ret;
+ int nents, ret;
table = kzalloc(sizeof(*table), GFP_KERNEL);
if (!table)
ret = sg_alloc_table(table, 1, GFP_KERNEL);
if (ret < 0)
- goto err;
+ goto err_alloc;
sg_set_page(table->sgl, page, attach->dmabuf->size, 0);
+
+ nents = dma_map_sg(attach->dev, table->sgl, 1, direction);
+ if (!nents) {
+ ret = -EINVAL;
+ goto err_map;
+ }
+
return table;
-err:
+err_map:
+ sg_free_table(table);
+err_alloc:
kfree(table);
return ERR_PTR(ret);
}
static void adf_memblock_unmap(struct dma_buf_attachment *attach,
struct sg_table *table, enum dma_data_direction direction)
{
+ dma_unmap_sg(attach->dev, table->sgl, 1, direction);
sg_free_table(table);
}
return memcpy(buffer, temp, sz);
}
+char *simple_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+ char *end = buffer + buflen;
+ /* these dentries are never renamed, so d_lock is not needed */
+ if (prepend(&end, &buflen, " (deleted)", 11) ||
+ prepend_name(&end, &buflen, &dentry->d_name) ||
+ prepend(&end, &buflen, "/", 1))
+ end = ERR_PTR(-ENAMETOOLONG);
+ return end;
+}
+
/*
* Write full pathname from the root of the filesystem into the buffer.
*/
return h - hstates;
}
-static char *hugetlb_dname(struct dentry *dentry, char *buffer, int buflen)
-{
- return dynamic_dname(dentry, buffer, buflen, "/%s (deleted)",
- dentry->d_name.name);
-}
-
static struct dentry_operations anon_ops = {
- .d_dname = hugetlb_dname
+ .d_dname = simple_dname
};
/*
return 0;
}
+void notrace ramoops_console_write_buf(const char *buf, size_t size)
+{
+ struct ramoops_context *cxt = &oops_cxt;
+ persistent_ram_write(cxt->cprz, buf, size);
+}
+
static int ramoops_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
* helper function for dentry_operations.d_dname() members
*/
extern char *dynamic_dname(struct dentry *, char *, int, const char *, ...);
+extern char *simple_dname(struct dentry *, char *, int);
extern char *__d_path(const struct path *, const struct path *, char *, int);
extern char *d_absolute_path(const struct path *, char *, int);
ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
char *str, size_t len);
+void ramoops_console_write_buf(const char *buf, size_t size);
+
/*
* Ramoops platform data
* @mem_size memory size for ramoops
#define KEY_VIDEO_NEXT 241 /* drive next video source */
#define KEY_VIDEO_PREV 242 /* drive previous video source */
#define KEY_BRIGHTNESS_CYCLE 243 /* brightness up, after max is min */
-#define KEY_BRIGHTNESS_ZERO 244 /* brightness off, use ambient */
+#define KEY_BRIGHTNESS_AUTO 244 /* Set Auto Brightness: manual
+ brightness control is off,
+ rely on ambient */
+#define KEY_BRIGHTNESS_ZERO KEY_BRIGHTNESS_AUTO
#define KEY_DISPLAY_OFF 245 /* display device to off state */
-#define KEY_WIMAX 246
+#define KEY_WWAN 246 /* Wireless WAN (LTE, UMTS, GSM, etc.) */
+#define KEY_WIMAX KEY_WWAN
#define KEY_RFKILL 247 /* Key that controls all radios */
#define KEY_MICMUTE 248 /* Mute / unmute the microphone */
#define BTN_DEAD 0x12f
#define BTN_GAMEPAD 0x130
-#define BTN_A 0x130
-#define BTN_B 0x131
+#define BTN_SOUTH 0x130
+#define BTN_A BTN_SOUTH
+#define BTN_EAST 0x131
+#define BTN_B BTN_EAST
#define BTN_C 0x132
-#define BTN_X 0x133
-#define BTN_Y 0x134
+#define BTN_NORTH 0x133
+#define BTN_X BTN_NORTH
+#define BTN_WEST 0x134
+#define BTN_Y BTN_WEST
#define BTN_Z 0x135
#define BTN_TL 0x136
#define BTN_TR 0x137
#define KEY_ADDRESSBOOK 0x1ad /* AL Contacts/Address Book */
#define KEY_MESSENGER 0x1ae /* AL Instant Messaging */
#define KEY_DISPLAYTOGGLE 0x1af /* Turn display (LCD) on and off */
+#define KEY_BRIGHTNESS_TOGGLE KEY_DISPLAYTOGGLE
#define KEY_SPELLCHECK 0x1b0 /* AL Spell Check */
#define KEY_LOGOFF 0x1b1 /* AL Logoff */
#define KEY_ATTENDANT_TOGGLE 0x21d /* Attendant call on or off */
#define KEY_LIGHTS_TOGGLE 0x21e /* Reading light on or off */
+#define BTN_DPAD_UP 0x220
+#define BTN_DPAD_DOWN 0x221
+#define BTN_DPAD_LEFT 0x222
+#define BTN_DPAD_RIGHT 0x223
+
+#define KEY_ALS_TOGGLE 0x230 /* Ambient light sensor */
+
+#define KEY_BUTTONCONFIG 0x240 /* AL Button Configuration */
+#define KEY_TASKMANAGER 0x241 /* AL Task/Project Manager */
+#define KEY_JOURNAL 0x242 /* AL Log/Journal/Timecard */
+#define KEY_CONTROLPANEL 0x243 /* AL Control Panel */
+#define KEY_APPSELECT 0x244 /* AL Select Task/Application */
+#define KEY_SCREENSAVER 0x245 /* AL Screen Saver */
+#define KEY_VOICECOMMAND 0x246 /* Listening Voice Command */
+
+#define KEY_BRIGHTNESS_MIN 0x250 /* Set Brightness to Minimum */
+#define KEY_BRIGHTNESS_MAX 0x251 /* Set Brightness to Maximum */
+
#define BTN_TRIGGER_HAPPY 0x2c0
#define BTN_TRIGGER_HAPPY1 0x2c0
#define BTN_TRIGGER_HAPPY2 0x2c1
#define SW_FRONT_PROXIMITY 0x0b /* set = front proximity sensor active */
#define SW_ROTATE_LOCK 0x0c /* set = rotate locked/disabled */
#define SW_LINEIN_INSERT 0x0d /* set = inserted */
+#define SW_MUTE_DEVICE 0x0e /* set = device disabled */
#define SW_MAX 0x0f
#define SW_CNT (SW_MAX+1)
#define PR_GET_TID_ADDRESS 40
+/* Sets the timerslack for arbitrary threads
+ * arg2 slack value, 0 means "use default"
+ * arg3 pid of the thread whose timer slack needs to be set
+ */
+#define PR_SET_TIMERSLACK_PID 41
+
#define PR_SET_VMA 0x53564d41
# define PR_SET_VMA_ANON_NAME 0
u32 default_format;
};
+#if IS_ENABLED(CONFIG_ADF_FBDEV)
void adf_modeinfo_to_fb_videomode(const struct drm_mode_modeinfo *mode,
struct fb_videomode *vmode);
void adf_modeinfo_from_fb_videomode(const struct fb_videomode *vmode,
int adf_fbdev_blank(int blank, struct fb_info *info);
int adf_fbdev_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);
int adf_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma);
+#else
+static inline void adf_modeinfo_to_fb_videomode(const struct drm_mode_modeinfo *mode,
+ struct fb_videomode *vmode)
+{
+ WARN_ONCE(1, "%s: CONFIG_ADF_FBDEV is disabled\n", __func__);
+}
+
+static inline void adf_modeinfo_from_fb_videomode(const struct fb_videomode *vmode,
+ struct drm_mode_modeinfo *mode)
+{
+ WARN_ONCE(1, "%s: CONFIG_ADF_FBDEV is disabled\n", __func__);
+}
+
+static inline int adf_fbdev_init(struct adf_fbdev *fbdev,
+ struct adf_interface *interface,
+ struct adf_overlay_engine *eng,
+ u16 xres_virtual, u16 yres_virtual, u32 format,
+ struct fb_ops *fbops, const char *fmt, ...)
+{
+ return -ENODEV;
+}
+
+static inline void adf_fbdev_destroy(struct adf_fbdev *fbdev) { }
+
+static inline int adf_fbdev_open(struct fb_info *info, int user)
+{
+ return -ENODEV;
+}
+
+static inline int adf_fbdev_release(struct fb_info *info, int user)
+{
+ return -ENODEV;
+}
+
+static inline int adf_fbdev_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ return -ENODEV;
+}
+
+static inline int adf_fbdev_set_par(struct fb_info *info)
+{
+ return -ENODEV;
+}
+
+static inline int adf_fbdev_blank(int blank, struct fb_info *info)
+{
+ return -ENODEV;
+}
+
+static inline int adf_fbdev_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info)
+{
+ return -ENODEV;
+}
+
+static inline int adf_fbdev_mmap(struct fb_info *info,
+ struct vm_area_struct *vma)
+{
+ return -ENODEV;
+}
+#endif
#endif /* _VIDEO_ADF_FBDEV_H_ */
static struct kobject *wakeup_reason;
static spinlock_t resume_reason_lock;
-static ssize_t reason_show(struct kobject *kobj, struct kobj_attribute *attr,
+static ssize_t last_resume_reason_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
int irq_no, buf_offset = 0;
return buf_offset;
}
-static struct kobj_attribute resume_reason = __ATTR(last_resume_reason, 0666,
- reason_show, NULL);
+static struct kobj_attribute resume_reason = __ATTR_RO(last_resume_reason);
static struct attribute *attrs[] = {
&resume_reason.attr,
#include <linux/ctype.h>
#include <linux/mm.h>
#include <linux/mempolicy.h>
+#include <linux/sched.h>
#include <linux/compat.h>
#include <linux/syscalls.h>
unsigned long, arg4, unsigned long, arg5)
{
struct task_struct *me = current;
+ struct task_struct *tsk;
unsigned char comm[sizeof(me->comm)];
long error;
else
return -EINVAL;
break;
+ case PR_SET_TIMERSLACK_PID:
+ rcu_read_lock();
+ tsk = find_task_by_pid_ns((pid_t)arg3, &init_pid_ns);
+ if (tsk == NULL) {
+ rcu_read_unlock();
+ return -EINVAL;
+ }
+ get_task_struct(tsk);
+ rcu_read_unlock();
+ if (arg2 <= 0)
+ tsk->timer_slack_ns =
+ tsk->default_timer_slack_ns;
+ else
+ tsk->timer_slack_ns = arg2;
+ put_task_struct(tsk);
+ error = 0;
+ break;
default:
return -EINVAL;
}
/* common code */
-static char *shmem_dname(struct dentry *dentry, char *buffer, int buflen)
-{
- return dynamic_dname(dentry, buffer, buflen, "/%s (deleted)",
- dentry->d_name.name);
-}
-
static struct dentry_operations anon_ops = {
- .d_dname = shmem_dname
+ .d_dname = simple_dname
};
/**
{
struct net *net = sock_net(sk);
kgid_t group = current_egid();
- struct group_info *group_info = get_current_groups();
- int i, j, count = group_info->ngroups;
+ struct group_info *group_info;
+ int i, j, count;
kgid_t low, high;
+ int ret = 0;
inet_get_ping_group_range_net(net, &low, &high);
if (gid_lte(low, group) && gid_lte(group, high))
return 0;
+ group_info = get_current_groups();
+ count = group_info->ngroups;
for (i = 0; i < group_info->nblocks; i++) {
int cp_count = min_t(int, NGROUPS_PER_BLOCK, count);
for (j = 0; j < cp_count; j++) {
kgid_t gid = group_info->blocks[i][j];
if (gid_lte(low, gid) && gid_lte(gid, high))
- return 0;
+ goto out_release_group;
}
count -= cp_count;
}
- return -EACCES;
+ ret = -EACCES;
+
+out_release_group:
+ put_group_info(group_info);
+ return ret;
}
EXPORT_SYMBOL_GPL(ping_init_sock);
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <linux/sysfs.h>
+#include <linux/rtc.h>
+#include <linux/time.h>
+#include <linux/math64.h>
+#include <linux/suspend.h>
+#include <linux/notifier.h>
#include <net/net_namespace.h>
struct idletimer_tg_attr {
struct kobject *kobj;
struct idletimer_tg_attr attr;
+ struct timespec delayed_timer_trigger;
+ struct timespec last_modified_timer;
+ struct timespec last_suspend_time;
+ struct notifier_block pm_nb;
+
+ int timeout;
unsigned int refcnt;
+ bool work_pending;
bool send_nl_msg;
bool active;
};
static LIST_HEAD(idletimer_tg_list);
static DEFINE_MUTEX(list_mutex);
+static DEFINE_SPINLOCK(timestamp_lock);
static struct kobject *idletimer_tg_kobj;
+static bool check_for_delayed_trigger(struct idletimer_tg *timer,
+ struct timespec *ts)
+{
+ bool state;
+ struct timespec temp;
+ spin_lock_bh(×tamp_lock);
+ timer->work_pending = false;
+ if ((ts->tv_sec - timer->last_modified_timer.tv_sec) > timer->timeout ||
+ timer->delayed_timer_trigger.tv_sec != 0) {
+ state = false;
+ temp.tv_sec = timer->timeout;
+ temp.tv_nsec = 0;
+ if (timer->delayed_timer_trigger.tv_sec != 0) {
+ temp = timespec_add(timer->delayed_timer_trigger, temp);
+ ts->tv_sec = temp.tv_sec;
+ ts->tv_nsec = temp.tv_nsec;
+ timer->delayed_timer_trigger.tv_sec = 0;
+ timer->work_pending = true;
+ schedule_work(&timer->work);
+ } else {
+ temp = timespec_add(timer->last_modified_timer, temp);
+ ts->tv_sec = temp.tv_sec;
+ ts->tv_nsec = temp.tv_nsec;
+ }
+ } else {
+ state = timer->active;
+ }
+ spin_unlock_bh(×tamp_lock);
+ return state;
+}
+
static void notify_netlink_uevent(const char *iface, struct idletimer_tg *timer)
{
char iface_msg[NLMSG_MAX_SIZE];
char state_msg[NLMSG_MAX_SIZE];
- char *envp[] = { iface_msg, state_msg, NULL };
+ char timestamp_msg[NLMSG_MAX_SIZE];
+ char *envp[] = { iface_msg, state_msg, timestamp_msg, NULL };
int res;
+ struct timespec ts;
+ uint64_t time_ns;
+ bool state;
res = snprintf(iface_msg, NLMSG_MAX_SIZE, "INTERFACE=%s",
iface);
pr_err("message too long (%d)", res);
return;
}
+
+ get_monotonic_boottime(&ts);
+ state = check_for_delayed_trigger(timer, &ts);
res = snprintf(state_msg, NLMSG_MAX_SIZE, "STATE=%s",
- timer->active ? "active" : "inactive");
+ state ? "active" : "inactive");
+
if (NLMSG_MAX_SIZE <= res) {
pr_err("message too long (%d)", res);
return;
}
+
+ time_ns = timespec_to_ns(&ts);
+ res = snprintf(timestamp_msg, NLMSG_MAX_SIZE, "TIME_NS=%llu", time_ns);
+ if (NLMSG_MAX_SIZE <= res) {
+ timestamp_msg[0] = '\0';
+ pr_err("message too long (%d)", res);
+ }
+
pr_debug("putting nlmsg: <%s> <%s>\n", iface_msg, state_msg);
kobject_uevent_env(idletimer_tg_kobj, KOBJ_CHANGE, envp);
return;
struct idletimer_tg *timer = (struct idletimer_tg *) data;
pr_debug("timer %s expired\n", timer->attr.attr.name);
-
+ spin_lock_bh(×tamp_lock);
timer->active = false;
+ timer->work_pending = true;
schedule_work(&timer->work);
+ spin_unlock_bh(×tamp_lock);
+}
+
+static int idletimer_resume(struct notifier_block *notifier,
+ unsigned long pm_event, void *unused)
+{
+ struct timespec ts;
+ unsigned long time_diff, now = jiffies;
+ struct idletimer_tg *timer = container_of(notifier,
+ struct idletimer_tg, pm_nb);
+ if (!timer)
+ return NOTIFY_DONE;
+ switch (pm_event) {
+ case PM_SUSPEND_PREPARE:
+ get_monotonic_boottime(&timer->last_suspend_time);
+ break;
+ case PM_POST_SUSPEND:
+ spin_lock_bh(×tamp_lock);
+ if (!timer->active) {
+ spin_unlock_bh(×tamp_lock);
+ break;
+ }
+ /* since jiffies are not updated when suspended now represents
+ * the time it would have suspended */
+ if (time_after(timer->timer.expires, now)) {
+ get_monotonic_boottime(&ts);
+ ts = timespec_sub(ts, timer->last_suspend_time);
+ time_diff = timespec_to_jiffies(&ts);
+ if (timer->timer.expires > (time_diff + now)) {
+ mod_timer_pending(&timer->timer,
+ (timer->timer.expires - time_diff));
+ } else {
+ del_timer(&timer->timer);
+ timer->timer.expires = 0;
+ timer->active = false;
+ timer->work_pending = true;
+ schedule_work(&timer->work);
+ }
+ }
+ spin_unlock_bh(×tamp_lock);
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_DONE;
}
static int idletimer_tg_create(struct idletimer_tg_info *info)
info->timer->refcnt = 1;
info->timer->send_nl_msg = (info->send_nl_msg == 0) ? false : true;
info->timer->active = true;
+ info->timer->timeout = info->timeout;
+
+ info->timer->delayed_timer_trigger.tv_sec = 0;
+ info->timer->delayed_timer_trigger.tv_nsec = 0;
+ info->timer->work_pending = false;
+ get_monotonic_boottime(&info->timer->last_modified_timer);
+
+ info->timer->pm_nb.notifier_call = idletimer_resume;
+ ret = register_pm_notifier(&info->timer->pm_nb);
+ if (ret)
+ printk(KERN_WARNING "[%s] Failed to register pm notifier %d\n",
+ __func__, ret);
mod_timer(&info->timer->timer,
msecs_to_jiffies(info->timeout * 1000) + jiffies);
return ret;
}
+static void reset_timer(const struct idletimer_tg_info *info)
+{
+ unsigned long now = jiffies;
+ struct idletimer_tg *timer = info->timer;
+ bool timer_prev;
+
+ spin_lock_bh(×tamp_lock);
+ timer_prev = timer->active;
+ timer->active = true;
+ /* timer_prev is used to guard overflow problem in time_before*/
+ if (!timer_prev || time_before(timer->timer.expires, now)) {
+ pr_debug("Starting Checkentry timer (Expired, Jiffies): %lu, %lu\n",
+ timer->timer.expires, now);
+ /* checks if there is a pending inactive notification*/
+ if (timer->work_pending)
+ timer->delayed_timer_trigger = timer->last_modified_timer;
+ else {
+ timer->work_pending = true;
+ schedule_work(&timer->work);
+ }
+ }
+
+ get_monotonic_boottime(&timer->last_modified_timer);
+ mod_timer(&timer->timer,
+ msecs_to_jiffies(info->timeout * 1000) + now);
+ spin_unlock_bh(×tamp_lock);
+}
+
/*
* The actual xt_tables plugin.
*/
}
/* TODO: Avoid modifying timers on each packet */
- mod_timer(&info->timer->timer,
- msecs_to_jiffies(info->timeout * 1000) + now);
-
+ reset_timer(info);
return XT_CONTINUE;
}
{
struct idletimer_tg_info *info = par->targinfo;
int ret;
- unsigned long now = jiffies;
pr_debug("checkentry targinfo %s\n", info->label);
info->timer = __idletimer_tg_find_by_label(info->label);
if (info->timer) {
info->timer->refcnt++;
- info->timer->active = true;
-
- if (time_before(info->timer->timer.expires, now)) {
- schedule_work(&info->timer->work);
- pr_debug("Starting Checkentry timer (Expired, Jiffies): %lu, %lu\n",
- info->timer->timer.expires, now);
- }
-
- mod_timer(&info->timer->timer,
- msecs_to_jiffies(info->timeout * 1000) + now);
-
+ reset_timer(info);
pr_debug("increased refcnt of timer %s to %u\n",
info->label, info->timer->refcnt);
} else {
list_del(&info->timer->entry);
del_timer_sync(&info->timer->timer);
sysfs_remove_file(idletimer_tg_kobj, &info->timer->attr.attr);
+ unregister_pm_notifier(&info->timer->pm_nb);
kfree(info->timer->attr.attr.name);
kfree(info->timer);
} else {
avc_dump_query(ab, ad->selinux_audit_data->ssid,
ad->selinux_audit_data->tsid,
ad->selinux_audit_data->tclass);
+ if (ad->selinux_audit_data->denied) {
+ audit_log_format(ab, " permissive=%u",
+ ad->selinux_audit_data->result ? 0 : 1);
+ }
}
/* This is the slow part of avc audit with big stack footprint */
noinline int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
- u32 requested, u32 audited, u32 denied,
+ u32 requested, u32 audited, u32 denied, int result,
struct common_audit_data *a,
unsigned flags)
{
sad.tsid = tsid;
sad.audited = audited;
sad.denied = denied;
+ sad.result = result;
a->selinux_audit_data = &sad;
static noinline int audit_inode_permission(struct inode *inode,
u32 perms, u32 audited, u32 denied,
+ int result,
unsigned flags)
{
struct common_audit_data ad;
ad.u.inode = inode;
rc = slow_avc_audit(current_sid(), isec->sid, isec->sclass, perms,
- audited, denied, &ad, flags);
+ audited, denied, result, &ad, flags);
if (rc)
return rc;
return 0;
if (likely(!audited))
return rc;
- rc2 = audit_inode_permission(inode, perms, audited, denied, flags);
+ rc2 = audit_inode_permission(inode, perms, audited, denied, rc, flags);
if (rc2)
return rc2;
return rc;
}
int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
- u32 requested, u32 audited, u32 denied,
+ u32 requested, u32 audited, u32 denied, int result,
struct common_audit_data *a,
unsigned flags);
if (likely(!audited))
return 0;
return slow_avc_audit(ssid, tsid, tclass,
- requested, audited, denied,
+ requested, audited, denied, result,
a, flags);
}
projects / firefly-linux-kernel-4.4.55.git / commitdiff