<listitem><para>debug_object_deactivate</para></listitem>
<listitem><para>debug_object_destroy</para></listitem>
<listitem><para>debug_object_free</para></listitem>
+ <listitem><para>debug_object_assert_init</para></listitem>
</itemizedlist>
Each of these functions takes the address of the real object and
a pointer to the object type specific debug description
debug checks.
</para>
</sect1>
+
+ <sect1 id="debug_object_assert_init">
+ <title>debug_object_assert_init</title>
+ <para>
+ This function is called to assert that an object has been
+ initialized.
+ </para>
+ <para>
+ When the real object is not tracked by debugobjects, it calls
+ fixup_assert_init of the object type description structure
+ provided by the caller, with the hardcoded object state
+ ODEBUG_NOT_AVAILABLE. The fixup function can correct the problem
+ by calling debug_object_init and other specific initializing
+ functions.
+ </para>
+ <para>
+ When the real object is already tracked by debugobjects it is
+ ignored.
+ </para>
+ </sect1>
</chapter>
<chapter id="fixupfunctions">
<title>Fixup functions</title>
statistics.
</para>
</sect1>
+ <sect1 id="fixup_assert_init">
+ <title>fixup_assert_init</title>
+ <para>
+ This function is called from the debug code whenever a problem
+ in debug_object_assert_init is detected.
+ </para>
+ <para>
+ Called from debug_object_assert_init() with a hardcoded state
+ ODEBUG_STATE_NOTAVAILABLE when the object is not found in the
+ debug bucket.
+ </para>
+ <para>
+ The function returns 1 when the fixup was successful,
+ otherwise 0. The return value is used to update the
+ statistics.
+ </para>
+ <para>
+ Note, this function should make sure debug_object_init() is
+ called before returning.
+ </para>
+ <para>
+ The handling of statically initialized objects is a special
+ case. The fixup function should check if this is a legitimate
+ case of a statically initialized object or not. In this case only
+ debug_object_init() should be called to make the object known to
+ the tracker. Then the function should return 0 because this is not
+ a real fixup.
+ </para>
+ </sect1>
</chapter>
<chapter id="bugs">
<title>Known Bugs And Assumptions</title>
# To closer match vmstat scanning statistics, only count isolate_both
# and isolate_inactive as scanning. isolate_active is rotation
- # isolate_inactive == 0
- # isolate_active == 1
- # isolate_both == 2
- if ($isolate_mode != 1) {
+ # isolate_inactive == 1
+ # isolate_active == 2
+ # isolate_both == 3
+ if ($isolate_mode != 2) {
$perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned;
}
$perprocesspid{$process_pid}->{HIGH_NR_CONTIG_DIRTY} += $nr_contig_dirty;
S: Maintained
F: Documentation/misc-devices/lis3lv02d
F: drivers/misc/lis3lv02d/
+F: drivers/platform/x86/hp_accel.c
LLC (802.2)
M: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
#define start_thread(regs,pc,sp) \
({ \
unsigned long *stack = (unsigned long *)sp; \
- set_fs(USER_DS); \
memset(regs->uregs, 0, sizeof(regs->uregs)); \
if (current->personality & ADDR_LIMIT_32BIT) \
regs->ARM_cpsr = USR_MODE; \
return sprintf(buf, "0x%X\n", mbox_value);
}
-static DEVICE_ATTR(fifo, S_IWUGO | S_IRUGO, mbox_read_fifo, mbox_write_fifo);
+static DEVICE_ATTR(fifo, S_IWUSR | S_IRUGO, mbox_read_fifo, mbox_write_fifo);
static int mbox_show(struct seq_file *s, void *data)
{
}
#define start_thread(regs,new_ip,new_sp) do { \
- set_fs(USER_DS); \
regs->cr_ipsr = ((regs->cr_ipsr | (IA64_PSR_BITS_TO_SET | IA64_PSR_CPL)) \
& ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_RI | IA64_PSR_IS)); \
regs->cr_iip = new_ip; \
select HAVE_FUNCTION_TRACE_MCOUNT_TEST if 64BIT
select RTC_CLASS
select RTC_DRV_GENERIC
+ select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
select INIT_ALL_POSSIBLE
select BUG
select HAVE_IRQ_WORK
portion of the kernel code won't be covered by a TLB anymore.
If in doubt, say "N".
-config DEBUG_STRICT_USER_COPY_CHECKS
- bool "Strict copy size checks"
- depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
- ---help---
- Enabling this option turns a certain set of sanity checks for user
- copy operations into compile time failures.
-
- The copy_from_user() etc checks are there to help test if there
- are sufficient security checks on the length argument of
- the copy operation, by having gcc prove that the argument is
- within bounds.
-
- If unsure, or if you run an older (pre 4.4) gcc, say N.
-
endmenu
/* offset pc for priv. level */ \
pc |= 3; \
\
- set_fs(USER_DS); \
regs->iasq[0] = spaceid; \
regs->iasq[1] = spaceid; \
regs->iaoq[0] = pc; \
elf_addr_t pc = (elf_addr_t)new_pc | 3; \
elf_caddr_t *argv = (elf_caddr_t *)bprm->exec + 1; \
\
- set_fs(USER_DS); \
regs->iasq[0] = spaceid; \
regs->iasq[1] = spaceid; \
regs->iaoq[0] = pc; \
/* Only needs to handle fpu stuff or perf monitors.
** REVISIT: several arches implement a "lazy fpu state".
*/
- set_fs(USER_DS);
}
void release_thread(struct task_struct *dead_task)
SYSCALL_SPU(syncfs)
COMPAT_SYS_SPU(sendmmsg)
SYSCALL_SPU(setns)
+COMPAT_SYS(process_vm_readv)
+COMPAT_SYS(process_vm_writev)
#define __NR_syncfs 348
#define __NR_sendmmsg 349
#define __NR_setns 350
+#define __NR_process_vm_readv 351
+#define __NR_process_vm_writev 352
#ifdef __KERNEL__
-#define __NR_syscalls 351
+#define __NR_syscalls 353
#define __NR__exit __NR_exit
#define NR_syscalls __NR_syscalls
select ARCH_INLINE_WRITE_UNLOCK_BH
select ARCH_INLINE_WRITE_UNLOCK_IRQ
select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
+ select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
config SCHED_OMIT_FRAME_POINTER
def_bool y
If you are unsure, say Y.
-config DEBUG_STRICT_USER_COPY_CHECKS
- def_bool n
- prompt "Strict user copy size checks"
- ---help---
- Enabling this option turns a certain set of sanity checks for user
- copy operations into compile time warnings.
-
- The copy_from_user() etc checks are there to help test if there
- are sufficient security checks on the length argument of
- the copy operation, by having gcc prove that the argument is
- within bounds.
-
- If unsure, or if you run an older (pre 4.4) gcc, say N.
-
config DEBUG_SET_MODULE_RONX
def_bool y
depends on MODULES
#
lib-y += delay.o string.o uaccess_std.o uaccess_pt.o
-obj-y += usercopy.o
obj-$(CONFIG_32BIT) += div64.o qrnnd.o ucmpdi2.o
lib-$(CONFIG_64BIT) += uaccess_mvcos.o
lib-$(CONFIG_SMP) += spinlock.o
#endif
}
- /* Now, this task is no longer a kernel thread. */
- current->thread.current_ds = USER_DS;
+ /* This task is no longer a kernel thread. */
if (current->thread.flags & SPARC_FLAG_KTHREAD) {
current->thread.flags &= ~SPARC_FLAG_KTHREAD;
/* Clear FPU register state. */
t->fpsaved[0] = 0;
-
- if (get_thread_current_ds() != ASI_AIUS)
- set_fs(USER_DS);
}
/* It's a bit more tricky when 64-bit tasks are involved... */
obj-$(CONFIG_SPARC32) += atomic32.o
obj-y += ksyms.o
obj-$(CONFIG_SPARC64) += PeeCeeI.o
-obj-y += usercopy.o
+++ /dev/null
-#include <linux/module.h>
-#include <linux/bug.h>
-
-void copy_from_user_overflow(void)
-{
- WARN(1, "Buffer overflow detected!\n");
-}
-EXPORT_SYMBOL(copy_from_user_overflow);
select GENERIC_FIND_FIRST_BIT
select USE_GENERIC_SMP_HELPERS
select CC_OPTIMIZE_FOR_SIZE
+ select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
select HAVE_GENERIC_HARDIRQS
select GENERIC_IRQ_PROBE
select GENERIC_PENDING_IRQ if SMP
config SMP
def_bool y
-# Allow checking for compile-time determined overflow errors in
-# copy_from_user(). There are still unprovable places in the
-# generic code as of 2.6.34, so this option is not really compatible
-# with -Werror, which is more useful in general.
-config DEBUG_COPY_FROM_USER
- def_bool n
-
config HVC_TILE
select HVC_DRIVER
def_bool y
return n;
}
-#ifdef CONFIG_DEBUG_COPY_FROM_USER
+#ifdef CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
+/*
+ * There are still unprovable places in the generic code as of 2.6.34, so this
+ * option is not really compatible with -Werror, which is more useful in
+ * general.
+ */
extern void copy_from_user_overflow(void)
__compiletime_warning("copy_from_user() size is not provably correct");
is_arch_mappable_range(addr, size));
}
EXPORT_SYMBOL(__range_ok);
-
-#ifdef CONFIG_DEBUG_COPY_FROM_USER
-void copy_from_user_overflow(void)
-{
- WARN(1, "Buffer overflow detected!\n");
-}
-EXPORT_SYMBOL(copy_from_user_overflow);
-#endif
#define start_thread(regs, pc, sp) \
({ \
unsigned long *stack = (unsigned long *)sp; \
- set_fs(USER_DS); \
memset(regs->uregs, 0, sizeof(regs->uregs)); \
regs->UCreg_asr = USER_MODE; \
regs->UCreg_pc = pc & ~1; /* pc */ \
select HAVE_TEXT_POKE_SMP
select HAVE_GENERIC_HARDIRQS
select HAVE_SPARSE_IRQ
+ select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
select GENERIC_FIND_FIRST_BIT
select GENERIC_IRQ_PROBE
select GENERIC_PENDING_IRQ if SMP
- AC adapter status updates
- Battery status updates
+config ALIX
+ bool "PCEngines ALIX System Support (LED setup)"
+ select GPIOLIB
+ ---help---
+ This option enables system support for the PCEngines ALIX.
+ At present this just sets up LEDs for GPIO control on
+ ALIX2/3/6 boards. However, other system specific setup should
+ get added here.
+
+ Note: You must still enable the drivers for GPIO and LED support
+ (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs
+
+ Note: You have to set alix.force=1 for boards with Award BIOS.
+
endif # X86_32
config AMD_NB
If unsure, say N.
-config DEBUG_STRICT_USER_COPY_CHECKS
- bool "Strict copy size checks"
- depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
- ---help---
- Enabling this option turns a certain set of sanity checks for user
- copy operations into compile time failures.
-
- The copy_from_user() etc checks are there to help test if there
- are sufficient security checks on the length argument of
- the copy operation, by having gcc prove that the argument is
- within bounds.
-
- If unsure, or if you run an older (pre 4.4) gcc, say N.
-
endmenu
.quad sys_syncfs
.quad compat_sys_sendmmsg /* 345 */
.quad sys_setns
+ .quad compat_sys_process_vm_readv
+ .quad compat_sys_process_vm_writev
ia32_syscall_end:
# define NR_IRQS NR_IRQS_LEGACY
#endif
+#define irq_vector_name(sirq) { sirq, #sirq }
+#define invalidate_tlb_vector_name(i) { INVALIDATE_TLB_VECTOR_END-31+i, \
+ "INVALIDATE_TLB_VECTOR" }
+
+#define irq_vector_name_table \
+ irq_vector_name(NMI_VECTOR), \
+ irq_vector_name(LOCAL_TIMER_VECTOR), \
+ irq_vector_name(ERROR_APIC_VECTOR), \
+ irq_vector_name(RESCHEDULE_VECTOR), \
+ irq_vector_name(CALL_FUNCTION_VECTOR), \
+ irq_vector_name(CALL_FUNCTION_SINGLE_VECTOR), \
+ irq_vector_name(THERMAL_APIC_VECTOR), \
+ irq_vector_name(THRESHOLD_APIC_VECTOR), \
+ irq_vector_name(REBOOT_VECTOR), \
+ irq_vector_name(SPURIOUS_APIC_VECTOR), \
+ irq_vector_name(IRQ_WORK_VECTOR), \
+ irq_vector_name(X86_PLATFORM_IPI_VECTOR), \
+ invalidate_tlb_vector_name(0), \
+ invalidate_tlb_vector_name(1), \
+ invalidate_tlb_vector_name(2), \
+ invalidate_tlb_vector_name(3), \
+ invalidate_tlb_vector_name(4), \
+ invalidate_tlb_vector_name(5), \
+ invalidate_tlb_vector_name(6), \
+ invalidate_tlb_vector_name(7), \
+ invalidate_tlb_vector_name(8), \
+ invalidate_tlb_vector_name(9), \
+ invalidate_tlb_vector_name(10), \
+ invalidate_tlb_vector_name(11), \
+ invalidate_tlb_vector_name(12), \
+ invalidate_tlb_vector_name(13), \
+ invalidate_tlb_vector_name(14), \
+ invalidate_tlb_vector_name(15), \
+ invalidate_tlb_vector_name(16), \
+ invalidate_tlb_vector_name(17), \
+ invalidate_tlb_vector_name(18), \
+ invalidate_tlb_vector_name(19), \
+ invalidate_tlb_vector_name(20), \
+ invalidate_tlb_vector_name(21), \
+ invalidate_tlb_vector_name(22), \
+ invalidate_tlb_vector_name(23), \
+ invalidate_tlb_vector_name(24), \
+ invalidate_tlb_vector_name(25), \
+ invalidate_tlb_vector_name(26), \
+ invalidate_tlb_vector_name(27), \
+ invalidate_tlb_vector_name(28), \
+ invalidate_tlb_vector_name(29), \
+ invalidate_tlb_vector_name(30), \
+ invalidate_tlb_vector_name(31)
+
#endif /* _ASM_X86_IRQ_VECTORS_H */
__must_check unsigned long
copy_in_user(void __user *to, const void __user *from, unsigned len);
+extern void copy_from_user_overflow(void)
+#ifdef CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
+ __compiletime_error("copy_from_user() buffer size is not provably correct")
+#else
+ __compiletime_warning("copy_from_user() buffer size is not provably correct")
+#endif
+;
+
static inline unsigned long __must_check copy_from_user(void *to,
const void __user *from,
unsigned long n)
might_fault();
if (likely(sz == -1 || sz >= n))
n = _copy_from_user(to, from, n);
-#ifdef CONFIG_DEBUG_VM
else
- WARN(1, "Buffer overflow detected!\n");
-#endif
+ copy_from_user_overflow();
return n;
}
#define __NR_syncfs 344
#define __NR_sendmmsg 345
#define __NR_setns 346
+#define __NR_process_vm_readv 347
+#define __NR_process_vm_writev 348
#ifdef __KERNEL__
-#define NR_syscalls 347
+#define NR_syscalls 349
#define __ARCH_WANT_IPC_PARSE_VERSION
#define __ARCH_WANT_OLD_READDIR
__SYSCALL(__NR_setns, sys_setns)
#define __NR_getcpu 309
__SYSCALL(__NR_getcpu, sys_getcpu)
+#define __NR_process_vm_readv 310
+__SYSCALL(__NR_process_vm_readv, sys_process_vm_readv)
+#define __NR_process_vm_writev 311
+__SYSCALL(__NR_process_vm_writev, sys_process_vm_writev)
#ifndef __NO_STUBS
#define __ARCH_WANT_OLD_READDIR
#include <linux/dmi.h>
#include <linux/smp.h>
#include <linux/mm.h>
+#include <trace/events/irq_vectors.h>
#include <asm/perf_event.h>
#include <asm/x86_init.h>
*/
exit_idle();
irq_enter();
+ trace_irq_vector_entry(LOCAL_TIMER_VECTOR);
local_apic_timer_interrupt();
+ trace_irq_vector_exit(LOCAL_TIMER_VECTOR);
irq_exit();
set_irq_regs(old_regs);
exit_idle();
irq_enter();
+ trace_irq_vector_entry(SPURIOUS_APIC_VECTOR);
/*
* Check if this really is a spurious interrupt and ACK it
* if it is a vectored one. Just in case...
/* see sw-dev-man vol 3, chapter 7.4.13.5 */
pr_info("spurious APIC interrupt on CPU#%d, "
"should never happen.\n", smp_processor_id());
+ trace_irq_vector_exit(SPURIOUS_APIC_VECTOR);
irq_exit();
}
exit_idle();
irq_enter();
+ trace_irq_vector_entry(ERROR_APIC_VECTOR);
/* First tickle the hardware, only then report what went on. -- REW */
v0 = apic_read(APIC_ESR);
apic_write(APIC_ESR, 0);
apic_printk(APIC_DEBUG, KERN_CONT "\n");
+ trace_irq_vector_exit(ERROR_APIC_VECTOR);
irq_exit();
}
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/cpu.h>
+#include <trace/events/irq_vectors.h>
#include <asm/processor.h>
#include <asm/system.h>
{
exit_idle();
irq_enter();
+ trace_irq_vector_entry(THERMAL_APIC_VECTOR);
inc_irq_stat(irq_thermal_count);
smp_thermal_vector();
+ trace_irq_vector_exit(THERMAL_APIC_VECTOR);
irq_exit();
/* Ack only at the end to avoid potential reentry */
ack_APIC_irq();
*/
#include <linux/interrupt.h>
#include <linux/kernel.h>
+#include <trace/events/irq_vectors.h>
#include <asm/irq_vectors.h>
#include <asm/apic.h>
{
exit_idle();
irq_enter();
+ trace_irq_vector_entry(THRESHOLD_APIC_VECTOR);
inc_irq_stat(irq_threshold_count);
mce_threshold_vector();
+ trace_irq_vector_exit(THRESHOLD_APIC_VECTOR);
irq_exit();
/* Ack only at the end to avoid potential reentry */
ack_APIC_irq();
#include <linux/acpi.h>
#include <linux/firmware-map.h>
#include <linux/memblock.h>
+#include <linux/sort.h>
#include <asm/e820.h>
#include <asm/proto.h>
* ____________________33__
* ______________________4_
*/
+struct change_member {
+ struct e820entry *pbios; /* pointer to original bios entry */
+ unsigned long long addr; /* address for this change point */
+};
+
+static int __init cpcompare(const void *a, const void *b)
+{
+ struct change_member * const *app = a, * const *bpp = b;
+ const struct change_member *ap = *app, *bp = *bpp;
+
+ /*
+ * Inputs are pointers to two elements of change_point[]. If their
+ * addresses are unequal, their difference dominates. If the addresses
+ * are equal, then consider one that represents the end of its region
+ * to be greater than one that does not.
+ */
+ if (ap->addr != bp->addr)
+ return ap->addr > bp->addr ? 1 : -1;
+
+ return (ap->addr != ap->pbios->addr) - (bp->addr != bp->pbios->addr);
+}
int __init sanitize_e820_map(struct e820entry *biosmap, int max_nr_map,
u32 *pnr_map)
{
- struct change_member {
- struct e820entry *pbios; /* pointer to original bios entry */
- unsigned long long addr; /* address for this change point */
- };
static struct change_member change_point_list[2*E820_X_MAX] __initdata;
static struct change_member *change_point[2*E820_X_MAX] __initdata;
static struct e820entry *overlap_list[E820_X_MAX] __initdata;
static struct e820entry new_bios[E820_X_MAX] __initdata;
- struct change_member *change_tmp;
unsigned long current_type, last_type;
unsigned long long last_addr;
- int chgidx, still_changing;
+ int chgidx;
int overlap_entries;
int new_bios_entry;
int old_nr, new_nr, chg_nr;
chg_nr = chgidx;
/* sort change-point list by memory addresses (low -> high) */
- still_changing = 1;
- while (still_changing) {
- still_changing = 0;
- for (i = 1; i < chg_nr; i++) {
- unsigned long long curaddr, lastaddr;
- unsigned long long curpbaddr, lastpbaddr;
-
- curaddr = change_point[i]->addr;
- lastaddr = change_point[i - 1]->addr;
- curpbaddr = change_point[i]->pbios->addr;
- lastpbaddr = change_point[i - 1]->pbios->addr;
-
- /*
- * swap entries, when:
- *
- * curaddr > lastaddr or
- * curaddr == lastaddr and curaddr == curpbaddr and
- * lastaddr != lastpbaddr
- */
- if (curaddr < lastaddr ||
- (curaddr == lastaddr && curaddr == curpbaddr &&
- lastaddr != lastpbaddr)) {
- change_tmp = change_point[i];
- change_point[i] = change_point[i-1];
- change_point[i-1] = change_tmp;
- still_changing = 1;
- }
- }
- }
+ sort(change_point, chg_nr, sizeof *change_point, cpcompare, 0);
/* create a new bios memory map, removing overlaps */
overlap_entries = 0; /* number of entries in the overlap table */
#include <asm/mce.h>
#include <asm/hw_irq.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/irq_vectors.h>
+
atomic_t irq_err_count;
/* Function pointer for generic interrupt vector handling */
exit_idle();
irq_enter();
-
+ trace_irq_vector_entry(X86_PLATFORM_IPI_VECTOR);
inc_irq_stat(x86_platform_ipis);
if (x86_platform_ipi_callback)
x86_platform_ipi_callback();
+ trace_irq_vector_exit(X86_PLATFORM_IPI_VECTOR);
irq_exit();
set_irq_regs(old_regs);
#include <linux/irq_work.h>
#include <linux/hardirq.h>
#include <asm/apic.h>
+#include <trace/events/irq_vectors.h>
void smp_irq_work_interrupt(struct pt_regs *regs)
{
irq_enter();
ack_APIC_irq();
+ trace_irq_vector_entry(IRQ_WORK_VECTOR);
inc_irq_stat(apic_irq_work_irqs);
irq_work_run();
+ trace_irq_vector_exit(IRQ_WORK_VECTOR);
irq_exit();
}
#include <linux/interrupt.h>
#include <linux/cpu.h>
#include <linux/gfp.h>
+#include <trace/events/irq_vectors.h>
#include <asm/mtrr.h>
#include <asm/tlbflush.h>
void smp_reschedule_interrupt(struct pt_regs *regs)
{
ack_APIC_irq();
+ trace_irq_vector_entry(RESCHEDULE_VECTOR);
inc_irq_stat(irq_resched_count);
scheduler_ipi();
+ trace_irq_vector_exit(RESCHEDULE_VECTOR);
/*
* KVM uses this interrupt to force a cpu out of guest mode
*/
{
ack_APIC_irq();
irq_enter();
+ trace_irq_vector_entry(CALL_FUNCTION_VECTOR);
generic_smp_call_function_interrupt();
inc_irq_stat(irq_call_count);
+ trace_irq_vector_exit(CALL_FUNCTION_VECTOR);
irq_exit();
}
{
ack_APIC_irq();
irq_enter();
+ trace_irq_vector_entry(CALL_FUNCTION_SINGLE_VECTOR);
generic_smp_call_function_single_interrupt();
inc_irq_stat(irq_call_count);
+ trace_irq_vector_exit(CALL_FUNCTION_SINGLE_VECTOR);
irq_exit();
}
.long sys_syncfs
.long sys_sendmmsg /* 345 */
.long sys_setns
+ .long sys_process_vm_readv
+ .long sys_process_vm_writev
}
EXPORT_SYMBOL(profile_pc);
+static irqreturn_t timer_interrupt(int irq, void *dev_id);
+static struct irqaction irq0 = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
+ .name = "timer"
+};
+
/*
* Default timer interrupt handler for PIT/HPET
*/
/* Keep nmi watchdog up to date */
inc_irq_stat(irq0_irqs);
+ trace_irq_handler_entry(irq, &irq0);
global_clock_event->event_handler(global_clock_event);
+ trace_irq_handler_exit(irq, &irq0, 1);
/* MCA bus quirk: Acknowledge irq0 by setting bit 7 in port 0x61 */
if (MCA_bus)
return IRQ_HANDLED;
}
-static struct irqaction irq0 = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
- .name = "timer"
-};
-
void __init setup_default_timer_irq(void)
{
setup_irq(0, &irq0);
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/io.h>
+#include <trace/events/irq_vectors.h>
#ifdef CONFIG_EISA
#include <linux/ioport.h>
do_nmi(struct pt_regs *regs, long error_code)
{
nmi_enter();
+ trace_irq_vector_entry(NMI_VECTOR);
inc_irq_stat(__nmi_count);
if (!ignore_nmis)
default_do_nmi(regs);
+ trace_irq_vector_exit(NMI_VECTOR);
nmi_exit();
}
return n;
}
EXPORT_SYMBOL(_copy_from_user);
-
-void copy_from_user_overflow(void)
-{
- WARN(1, "Buffer overflow detected!\n");
-}
-EXPORT_SYMBOL(copy_from_user_overflow);
*/
if (current->flags & PF_RANDOMIZE) {
if (mmap_is_ia32())
- rnd = (long)get_random_int() % (1<<8);
+ rnd = get_random_int() % (1<<8);
else
- rnd = (long)(get_random_int() % (1<<28));
+ rnd = get_random_int() % (1<<28);
}
return rnd << PAGE_SHIFT;
}
#include <linux/smp.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <trace/events/irq_vectors.h>
#include <linux/cpu.h>
#include <asm/tlbflush.h>
sender = ~regs->orig_ax - INVALIDATE_TLB_VECTOR_START;
f = &flush_state[sender];
+ trace_irq_vector_entry(INVALIDATE_TLB_VECTOR_START + sender);
if (!cpumask_test_cpu(cpu, to_cpumask(f->flush_cpumask)))
goto out;
/*
cpumask_clear_cpu(cpu, to_cpumask(f->flush_cpumask));
smp_mb__after_clear_bit();
inc_irq_stat(irq_tlb_count);
+ trace_irq_vector_exit(INVALIDATE_TLB_VECTOR_START + sender);
}
static void flush_tlb_others_ipi(const struct cpumask *cpumask,
# Platform specific code goes here
obj-y += ce4100/
obj-y += efi/
+obj-y += geode/
obj-y += iris/
obj-y += mrst/
obj-y += olpc/
--- /dev/null
+obj-$(CONFIG_ALIX) += alix.o
--- /dev/null
+/*
+ * System Specific setup for PCEngines ALIX.
+ * At the moment this means setup of GPIO control of LEDs
+ * on Alix.2/3/6 boards.
+ *
+ *
+ * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
+ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
+ *
+ * TODO: There are large similarities with leds-net5501.c
+ * by Alessandro Zummo <a.zummo@towertech.it>
+ * In the future leds-net5501.c should be migrated over to platform
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <asm/geode.h>
+
+static int force = 0;
+module_param(force, bool, 0444);
+/* FIXME: Award bios is not automatically detected as Alix platform */
+MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
+
+static struct gpio_led alix_leds[] = {
+ {
+ .name = "alix:1",
+ .gpio = 6,
+ .default_trigger = "default-on",
+ .active_low = 1,
+ },
+ {
+ .name = "alix:2",
+ .gpio = 25,
+ .default_trigger = "default-off",
+ .active_low = 1,
+ },
+ {
+ .name = "alix:3",
+ .gpio = 27,
+ .default_trigger = "default-off",
+ .active_low = 1,
+ },
+};
+
+static struct gpio_led_platform_data alix_leds_data = {
+ .num_leds = ARRAY_SIZE(alix_leds),
+ .leds = alix_leds,
+};
+
+static struct platform_device alix_leds_dev = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev.platform_data = &alix_leds_data,
+};
+
+static void __init register_alix(void)
+{
+ /* Setup LED control through leds-gpio driver */
+ platform_device_register(&alix_leds_dev);
+}
+
+static int __init alix_present(unsigned long bios_phys,
+ const char *alix_sig,
+ size_t alix_sig_len)
+{
+ const size_t bios_len = 0x00010000;
+ const char *bios_virt;
+ const char *scan_end;
+ const char *p;
+ char name[64];
+
+ if (force) {
+ printk(KERN_NOTICE "%s: forced to skip BIOS test, "
+ "assume system is ALIX.2/ALIX.3\n",
+ KBUILD_MODNAME);
+ return 1;
+ }
+
+ bios_virt = phys_to_virt(bios_phys);
+ scan_end = bios_virt + bios_len - (alix_sig_len + 2);
+ for (p = bios_virt; p < scan_end; p++) {
+ const char *tail;
+ char *a;
+
+ if (memcmp(p, alix_sig, alix_sig_len) != 0)
+ continue;
+
+ memcpy(name, p, sizeof(name));
+
+ /* remove the first \0 character from string */
+ a = strchr(name, '\0');
+ if (a)
+ *a = ' ';
+
+ /* cut the string at a newline */
+ a = strchr(name, '\r');
+ if (a)
+ *a = '\0';
+
+ tail = p + alix_sig_len;
+ if ((tail[0] == '2' || tail[0] == '3')) {
+ printk(KERN_INFO
+ "%s: system is recognized as \"%s\"\n",
+ KBUILD_MODNAME, name);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int __init alix_init(void)
+{
+ const char tinybios_sig[] = "PC Engines ALIX.";
+ const char coreboot_sig[] = "PC Engines\0ALIX.";
+
+ if (!is_geode())
+ return 0;
+
+ if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
+ alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
+ register_alix();
+
+ return 0;
+}
+
+module_init(alix_init);
+
+MODULE_AUTHOR("Ed Wildgoose <kernel@wildgooses.com>");
+MODULE_DESCRIPTION("PCEngines ALIX System Setup");
+MODULE_LICENSE("GPL");
#include <linux/moduleparam.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/delay.h>
* by reading its input port and seeing whether the read value is
* meaningful.
*/
-static int iris_init(void)
+static int iris_probe(struct platform_device *pdev)
{
- unsigned char status;
- if (force != 1) {
- printk(KERN_ERR "The force parameter has not been set to 1 so the Iris poweroff handler will not be installed.\n");
- return -ENODEV;
- }
- status = inb(IRIS_GIO_INPUT);
+ unsigned char status = inb(IRIS_GIO_INPUT);
if (status == IRIS_GIO_NODEV) {
- printk(KERN_ERR "This machine does not seem to be an Iris. Power_off handler not installed.\n");
+ printk(KERN_ERR "This machine does not seem to be an Iris. "
+ "Power off handler not installed.\n");
return -ENODEV;
}
old_pm_power_off = pm_power_off;
pm_power_off = &iris_power_off;
printk(KERN_INFO "Iris power_off handler installed.\n");
-
return 0;
}
-static void iris_exit(void)
+static int iris_remove(struct platform_device *pdev)
{
pm_power_off = old_pm_power_off;
printk(KERN_INFO "Iris power_off handler uninstalled.\n");
+ return 0;
+}
+
+static struct platform_driver iris_driver = {
+ .driver = {
+ .name = "iris",
+ .owner = THIS_MODULE,
+ },
+ .probe = iris_probe,
+ .remove = iris_remove,
+};
+
+static struct resource iris_resources[] = {
+ {
+ .start = IRIS_GIO_BASE,
+ .end = IRIS_GIO_OUTPUT,
+ .flags = IORESOURCE_IO,
+ .name = "address"
+ }
+};
+
+static struct platform_device *iris_device;
+
+static int iris_init(void)
+{
+ int ret;
+ if (force != 1) {
+ printk(KERN_ERR "The force parameter has not been set to 1."
+ " The Iris poweroff handler will not be installed.\n");
+ return -ENODEV;
+ }
+ ret = platform_driver_register(&iris_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "Failed to register iris platform driver: %d\n",
+ ret);
+ return ret;
+ }
+ iris_device = platform_device_register_simple("iris", (-1),
+ iris_resources, ARRAY_SIZE(iris_resources));
+ if (IS_ERR(iris_device)) {
+ printk(KERN_ERR "Failed to register iris platform device\n");
+ platform_driver_unregister(&iris_driver);
+ return PTR_ERR(iris_device);
+ }
+ return 0;
+}
+
+static void iris_exit(void)
+{
+ platform_device_unregister(iris_device);
+ platform_driver_unregister(&iris_driver);
}
module_init(iris_init);
out:
bio_endio(bio, err);
- return 0;
+ return err;
}
#ifdef CONFIG_BLK_DEV_XIP
use_virtual_dma = can_use_virtual_dma & 1;
fdc_state[0].address = FDC1;
if (fdc_state[0].address == -1) {
- del_timer(&fd_timeout);
+ del_timer_sync(&fd_timeout);
err = -ENODEV;
goto out_unreg_region;
}
fdc = 0; /* reset fdc in case of unexpected interrupt */
err = floppy_grab_irq_and_dma();
if (err) {
- del_timer(&fd_timeout);
+ del_timer_sync(&fd_timeout);
err = -EBUSY;
goto out_unreg_region;
}
user_reset_fdc(-1, FD_RESET_ALWAYS, false);
}
fdc = 0;
- del_timer(&fd_timeout);
+ del_timer_sync(&fd_timeout);
current_drive = 0;
initialized = true;
if (have_no_fdc) {
unregister_blkdev(FLOPPY_MAJOR, "fd");
out_put_disk:
while (dr--) {
- del_timer(&motor_off_timer[dr]);
+ del_timer_sync(&motor_off_timer[dr]);
if (disks[dr]->queue)
blk_cleanup_queue(disks[dr]->queue);
put_disk(disks[dr]);
static int hpet_open(struct inode *inode, struct file *file)
{
- struct hpet_dev *devp;
struct hpets *hpetp;
- int i;
if (file->f_mode & FMODE_WRITE)
return -EINVAL;
+ hpetp = hpets;
+ /* starting with timer-neutral instance */
+ file->private_data = &hpetp->hp_dev[hpetp->hp_ntimer];
+
+ return 0;
+}
+
+static int hpet_alloc_timer(struct file *file)
+{
+ struct hpet_dev *devp;
+ struct hpets *hpetp;
+ int i;
+
+ /* once acquired, will remain */
+ devp = file->private_data;
+ if (devp->hd_timer)
+ return 0;
+
mutex_lock(&hpet_mutex);
spin_lock_irq(&hpet_lock);
+ /* check for race acquiring */
+ devp = file->private_data;
+ if (devp->hd_timer) {
+ spin_unlock_irq(&hpet_lock);
+ mutex_unlock(&hpet_mutex);
+ return 0;
+ }
+
for (devp = NULL, hpetp = hpets; hpetp && !devp; hpetp = hpetp->hp_next)
for (i = 0; i < hpetp->hp_ntimer; i++)
if (hpetp->hp_dev[i].hd_flags & HPET_OPEN)
static int hpet_fasync(int fd, struct file *file, int on)
{
struct hpet_dev *devp;
+ int r;
+
+ r = hpet_alloc_timer(file);
+ if (r < 0)
+ return r;
devp = file->private_data;
devp = file->private_data;
timer = devp->hd_timer;
+ if (!timer)
+ goto out;
+
spin_lock_irq(&hpet_lock);
writeq((readq(&timer->hpet_config) & ~Tn_INT_ENB_CNF_MASK),
if (irq)
free_irq(irq, devp);
-
+out:
file->private_data = NULL;
return 0;
}
break;
case HPET_IE_ON:
return hpet_ioctl_ieon(devp);
+ case HPET_ALLOC_TIMER:
+ /* nothing to do */
+ return 0;
default:
return -EINVAL;
}
return 0;
}
- siz = sizeof(struct hpets) + ((hdp->hd_nirqs - 1) *
+ /*
+ * last hpet_dev will have null timer pointer, gives timer-neutral
+ * representation of block
+ */
+ siz = sizeof(struct hpets) + ((hdp->hd_nirqs) *
sizeof(struct hpet_dev));
hpetp = kzalloc(siz, GFP_KERNEL);
writeq(mcfg, &hpet->hpet_config);
}
- for (i = 0, devp = hpetp->hp_dev; i < hpetp->hp_ntimer; i++, devp++) {
+ for (i = 0, devp = hpetp->hp_dev; i < hpetp->hp_ntimer + 1;
+ i++, devp++) {
struct hpet_timer __iomem *timer;
- timer = &hpet->hpet_timers[devp - hpetp->hp_dev];
-
devp->hd_hpets = hpetp;
devp->hd_hpet = hpet;
+ if (i == hpetp->hp_ntimer)
+ continue;
+
+ timer = &hpet->hpet_timers[devp - hpetp->hp_dev];
devp->hd_timer = timer;
/*
}
/**
- * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information.
+ * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name
* @str: Case sensitive Name
*/
int dmi_name_in_vendors(const char *str)
{
- static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR,
- DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR,
- DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE };
+ static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE };
int i;
for (i = 0; fields[i] != DMI_NONE; i++) {
int f = fields[i];
#include <linux/kernel.h>
struct vmwgfx_gmrid_man {
- spinlock_t lock;
struct ida gmr_ida;
uint32_t max_gmr_ids;
};
{
struct vmwgfx_gmrid_man *gman =
(struct vmwgfx_gmrid_man *)man->priv;
- int ret;
int id;
mem->mm_node = NULL;
- do {
- if (unlikely(ida_pre_get(&gman->gmr_ida, GFP_KERNEL) == 0))
- return -ENOMEM;
-
- spin_lock(&gman->lock);
- ret = ida_get_new(&gman->gmr_ida, &id);
-
- if (unlikely(ret == 0 && id >= gman->max_gmr_ids)) {
- ida_remove(&gman->gmr_ida, id);
- spin_unlock(&gman->lock);
+ id = ida_simple_get(&gman->gmr_ida, 0, gman->max_gmr_ids, GFP_KERNEL);
+ if (id < 0) {
+ if (id == -ENOSPC)
return 0;
- }
-
- spin_unlock(&gman->lock);
-
- } while (ret == -EAGAIN);
-
- if (likely(ret == 0)) {
- mem->mm_node = gman;
- mem->start = id;
+ return id;
}
+ mem->mm_node = gman;
+ mem->start = id;
- return ret;
+ return 0;
}
static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
(struct vmwgfx_gmrid_man *)man->priv;
if (mem->mm_node) {
- spin_lock(&gman->lock);
- ida_remove(&gman->gmr_ida, mem->start);
- spin_unlock(&gman->lock);
+ ida_simple_remove(&gman->gmr_ida, mem->start);
mem->mm_node = NULL;
}
}
if (unlikely(gman == NULL))
return -ENOMEM;
- spin_lock_init(&gman->lock);
ida_init(&gman->gmr_ida);
gman->max_gmr_ids = p_size;
man->priv = (void *) gman;
static struct class *hwmon_class;
-static DEFINE_IDR(hwmon_idr);
-static DEFINE_SPINLOCK(idr_lock);
+static DEFINE_IDA(hwmon_ida);
/**
* hwmon_device_register - register w/ hwmon
struct device *hwmon_device_register(struct device *dev)
{
struct device *hwdev;
- int id, err;
-
-again:
- if (unlikely(idr_pre_get(&hwmon_idr, GFP_KERNEL) == 0))
- return ERR_PTR(-ENOMEM);
-
- spin_lock(&idr_lock);
- err = idr_get_new(&hwmon_idr, NULL, &id);
- spin_unlock(&idr_lock);
+ int id;
- if (unlikely(err == -EAGAIN))
- goto again;
- else if (unlikely(err))
- return ERR_PTR(err);
+ id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL);
+ if (id < 0)
+ return ERR_PTR(id);
- id = id & MAX_ID_MASK;
hwdev = device_create(hwmon_class, dev, MKDEV(0, 0), NULL,
HWMON_ID_FORMAT, id);
- if (IS_ERR(hwdev)) {
- spin_lock(&idr_lock);
- idr_remove(&hwmon_idr, id);
- spin_unlock(&idr_lock);
- }
+ if (IS_ERR(hwdev))
+ ida_simple_remove(&hwmon_ida, id);
return hwdev;
}
if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) {
device_unregister(dev);
- spin_lock(&idr_lock);
- idr_remove(&hwmon_idr, id);
- spin_unlock(&idr_lock);
+ ida_simple_remove(&hwmon_ida, id);
} else
dev_dbg(dev->parent,
"hwmon_device_unregister() failed: bad class ID!\n");
#define AEM_MIN_POWER_INTERVAL 200
#define UJ_PER_MJ 1000L
-static DEFINE_IDR(aem_idr);
-static DEFINE_SPINLOCK(aem_idr_lock);
+static DEFINE_IDA(aem_ida);
static struct platform_driver aem_driver = {
.driver = {
complete(&data->read_complete);
}
-/* ID functions */
-
-/* Obtain an id */
-static int aem_idr_get(int *id)
-{
- int i, err;
-
-again:
- if (unlikely(!idr_pre_get(&aem_idr, GFP_KERNEL)))
- return -ENOMEM;
-
- spin_lock(&aem_idr_lock);
- err = idr_get_new(&aem_idr, NULL, &i);
- spin_unlock(&aem_idr_lock);
-
- if (unlikely(err == -EAGAIN))
- goto again;
- else if (unlikely(err))
- return err;
-
- *id = i & MAX_ID_MASK;
- return 0;
-}
-
-/* Release an object ID */
-static void aem_idr_put(int id)
-{
- spin_lock(&aem_idr_lock);
- idr_remove(&aem_idr, id);
- spin_unlock(&aem_idr_lock);
-}
-
/* Sensor support functions */
/* Read a sensor value */
ipmi_destroy_user(data->ipmi.user);
platform_set_drvdata(data->pdev, NULL);
platform_device_unregister(data->pdev);
- aem_idr_put(data->id);
+ ida_simple_remove(&aem_ida, data->id);
kfree(data);
}
data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
/* Create sub-device for this fw instance */
- if (aem_idr_get(&data->id))
+ data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
+ if (data->id < 0)
goto id_err;
data->pdev = platform_device_alloc(DRVNAME, data->id);
platform_set_drvdata(data->pdev, NULL);
platform_device_unregister(data->pdev);
dev_err:
- aem_idr_put(data->id);
+ ida_simple_remove(&aem_ida, data->id);
id_err:
kfree(data);
data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
/* Create sub-device for this fw instance */
- if (aem_idr_get(&data->id))
+ data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
+ if (data->id < 0)
goto id_err;
data->pdev = platform_device_alloc(DRVNAME, data->id);
platform_set_drvdata(data->pdev, NULL);
platform_device_unregister(data->pdev);
dev_err:
- aem_idr_put(data->id);
+ ida_simple_remove(&aem_ida, data->id);
id_err:
kfree(data);
clockevents_notify(reason, &cpu);
}
-static int setup_broadcast_cpuhp_notify(struct notifier_block *n,
+static void auto_demotion_disable(void *dummy)
+{
+ unsigned long long msr_bits;
+
+ rdmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
+ msr_bits &= ~auto_demotion_disable_flags;
+ wrmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
+}
+
+static void __intel_idle_notify_handler(void *arg)
+{
+ if (auto_demotion_disable_flags)
+ auto_demotion_disable(NULL);
+
+ if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE)
+ __setup_broadcast_timer((void *)true);
+}
+
+static int setup_intelidle_cpuhp_notify(struct notifier_block *n,
unsigned long action, void *hcpu)
{
int hotcpu = (unsigned long)hcpu;
switch (action & 0xf) {
case CPU_ONLINE:
- smp_call_function_single(hotcpu, __setup_broadcast_timer,
- (void *)true, 1);
+ smp_call_function_single(hotcpu, __intel_idle_notify_handler,
+ NULL, 1);
break;
}
return NOTIFY_OK;
}
-static struct notifier_block setup_broadcast_notifier = {
- .notifier_call = setup_broadcast_cpuhp_notify,
+static struct notifier_block setup_intelidle_notifier = {
+ .notifier_call = setup_intelidle_cpuhp_notify,
};
-static void auto_demotion_disable(void *dummy)
-{
- unsigned long long msr_bits;
-
- rdmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
- msr_bits &= ~auto_demotion_disable_flags;
- wrmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
-}
-
/*
* intel_idle_probe()
*/
if (boot_cpu_has(X86_FEATURE_ARAT)) /* Always Reliable APIC Timer */
lapic_timer_reliable_states = LAPIC_TIMER_ALWAYS_RELIABLE;
- else {
- smp_call_function(__setup_broadcast_timer, (void *)true, 1);
- register_cpu_notifier(&setup_broadcast_notifier);
- }
+ else
+ on_each_cpu(__setup_broadcast_timer, (void *)true, 1);
pr_debug(PREFIX "v" INTEL_IDLE_VERSION
" model 0x%X\n", boot_cpu_data.x86_model);
}
}
if (auto_demotion_disable_flags)
- smp_call_function(auto_demotion_disable, NULL, 1);
+ on_each_cpu(auto_demotion_disable, NULL, 1);
return 0;
}
return retval;
}
+ if (auto_demotion_disable_flags || lapic_timer_reliable_states !=
+ LAPIC_TIMER_ALWAYS_RELIABLE)
+ register_cpu_notifier(&setup_intelidle_notifier);
+
return 0;
}
intel_idle_cpuidle_devices_uninit();
cpuidle_unregister_driver(&intel_idle_driver);
- if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE) {
- smp_call_function(__setup_broadcast_timer, (void *)false, 1);
- unregister_cpu_notifier(&setup_broadcast_notifier);
- }
+ if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE)
+ on_each_cpu(__setup_broadcast_timer, (void *)false, 1);
+
+ if (auto_demotion_disable_flags || lapic_timer_reliable_states !=
+ LAPIC_TIMER_ALWAYS_RELIABLE)
+ unregister_cpu_notifier(&setup_intelidle_notifier);
return;
}
return ret;
}
-static LIST_HEAD(dmar_atsr_units);
+LIST_HEAD(dmar_atsr_units);
static int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr)
{
atsru->hdr = hdr;
atsru->include_all = atsr->flags & 0x1;
+ atsru->segment = atsr->segment;
list_add(&atsru->list, &dmar_atsr_units);
{
int i;
struct pci_bus *bus;
- struct acpi_dmar_atsr *atsr;
struct dmar_atsr_unit *atsru;
dev = pci_physfn(dev);
list_for_each_entry(atsru, &dmar_atsr_units, list) {
- atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header);
- if (atsr->segment == pci_domain_nr(dev->bus))
+ if (atsru->segment == pci_domain_nr(dev->bus))
goto found;
}
return NULL;
}
+#ifdef CONFIG_HOTPLUG
+struct dev_dmaru {
+ struct list_head list;
+ void *dmaru;
+ int index;
+ int segment;
+ unsigned char bus;
+ unsigned int devfn;
+};
+
+static int
+save_dev_dmaru(int segment, unsigned char bus, unsigned int devfn,
+ void *dmaru, int index, struct list_head *lh)
+{
+ struct dev_dmaru *m;
+
+ m = kzalloc(sizeof(*m), GFP_KERNEL);
+ if (!m)
+ return -ENOMEM;
+
+ m->segment = segment;
+ m->bus = bus;
+ m->devfn = devfn;
+ m->dmaru = dmaru;
+ m->index = index;
+
+ list_add(&m->list, lh);
+
+ return 0;
+}
+
+static void
+*get_dev_dmaru(int segment, unsigned char bus, unsigned int devfn,
+ int *index, struct list_head *lh)
+{
+ struct dev_dmaru *m;
+ void *dmaru = NULL;
+
+ list_for_each_entry(m, lh, list) {
+ if (m->segment == segment &&
+ m->bus == bus && m->devfn == devfn) {
+ *index = m->index;
+ dmaru = m->dmaru;
+ list_del(&m->list);
+ kfree(m);
+ break;
+ }
+ }
+
+ return dmaru;
+}
+
+static LIST_HEAD(saved_dev_drhd_list);
+
+static void remove_dev_from_drhd(struct pci_dev *dev)
+{
+ struct dmar_drhd_unit *drhd = NULL;
+ int segment = pci_domain_nr(dev->bus);
+ int i;
+
+ for_each_drhd_unit(drhd) {
+ if (drhd->ignored)
+ continue;
+ if (segment != drhd->segment)
+ continue;
+
+ for (i = 0; i < drhd->devices_cnt; i++) {
+ if (drhd->devices[i] == dev) {
+ /* save it at first if it is in drhd */
+ save_dev_dmaru(segment, dev->bus->number,
+ dev->devfn, drhd, i,
+ &saved_dev_drhd_list);
+ /* always remove it */
+ drhd->devices[i] = NULL;
+ return;
+ }
+ }
+ }
+}
+
+static void restore_dev_to_drhd(struct pci_dev *dev)
+{
+ struct dmar_drhd_unit *drhd = NULL;
+ int i;
+
+ /* find the stored drhd */
+ drhd = get_dev_dmaru(pci_domain_nr(dev->bus), dev->bus->number,
+ dev->devfn, &i, &saved_dev_drhd_list);
+ /* restore that into drhd */
+ if (drhd)
+ drhd->devices[i] = dev;
+}
+#else
+static void remove_dev_from_drhd(struct pci_dev *dev)
+{
+}
+
+static void restore_dev_to_drhd(struct pci_dev *dev)
+{
+}
+#endif
+
+#if defined(CONFIG_DMAR) && defined(CONFIG_HOTPLUG)
+static LIST_HEAD(saved_dev_atsr_list);
+
+static void remove_dev_from_atsr(struct pci_dev *dev)
+{
+ struct dmar_atsr_unit *atsr = NULL;
+ int segment = pci_domain_nr(dev->bus);
+ int i;
+
+ for_each_atsr_unit(atsr) {
+ if (segment != atsr->segment)
+ continue;
+
+ for (i = 0; i < atsr->devices_cnt; i++) {
+ if (atsr->devices[i] == dev) {
+ /* save it at first if it is in drhd */
+ save_dev_dmaru(segment, dev->bus->number,
+ dev->devfn, atsr, i,
+ &saved_dev_atsr_list);
+ /* always remove it */
+ atsr->devices[i] = NULL;
+ return;
+ }
+ }
+ }
+}
+
+static void restore_dev_to_atsr(struct pci_dev *dev)
+{
+ struct dmar_atsr_unit *atsr = NULL;
+ int i;
+
+ /* find the stored atsr */
+ atsr = get_dev_dmaru(pci_domain_nr(dev->bus), dev->bus->number,
+ dev->devfn, &i, &saved_dev_atsr_list);
+ /* restore that into atsr */
+ if (atsr)
+ atsr->devices[i] = dev;
+}
+#else
+static void remove_dev_from_atsr(struct pci_dev *dev)
+{
+}
+
+static void restore_dev_to_atsr(struct pci_dev *dev)
+{
+}
+#endif
+
static void domain_flush_cache(struct dmar_domain *domain,
void *addr, int size)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dmar_domain *domain;
- if (iommu_no_mapping(dev))
+ if (unlikely(dev->bus != &pci_bus_type))
return 0;
- domain = find_domain(pdev);
- if (!domain)
- return 0;
+ switch (action) {
+ case BUS_NOTIFY_UNBOUND_DRIVER:
+ if (iommu_no_mapping(dev))
+ goto out;
+
+ if (iommu_pass_through)
+ goto out;
+
+ domain = find_domain(pdev);
+ if (!domain)
+ goto out;
- if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) {
domain_remove_one_dev_info(domain, pdev);
if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) &&
!(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) &&
list_empty(&domain->devices))
domain_exit(domain);
+out:
+ remove_dev_from_drhd(pdev);
+ remove_dev_from_atsr(pdev);
+
+ break;
+ case BUS_NOTIFY_ADD_DEVICE:
+ restore_dev_to_drhd(pdev);
+ restore_dev_to_atsr(pdev);
+ break;
}
return 0;
help
This option enables support for the PCEngines WRAP programmable LEDs.
-config LEDS_ALIX2
- tristate "LED Support for ALIX.2 and ALIX.3 series"
- depends on LEDS_CLASS
- depends on X86 && !GPIO_CS5535 && !CS5535_GPIO
- help
- This option enables support for the PCEngines ALIX.2 and ALIX.3 LEDs.
- You have to set leds-alix2.force=1 for boards with Award BIOS.
-
config LEDS_COBALT_QUBE
tristate "LED Support for the Cobalt Qube series front LED"
depends on LEDS_CLASS
cannot be used. This driver supports hardware blinking with an on+off
period from 62ms to 125s. Say Y to enable LEDs on the HP iPAQ hx4700.
+config LEDS_RENESAS_TPU
+ bool "LED support for Renesas TPU"
+ depends on LEDS_CLASS && HAVE_CLK && GENERIC_GPIO
+ help
+ This option enables build of the LED TPU platform driver,
+ suitable to drive any TPU channel on newer Renesas SoCs.
+ The driver controls the GPIO pin connected to the LED via
+ the GPIO framework and expects the LED to be connected to
+ a pin that can be driven in both GPIO mode and using TPU
+ pin function. The latter to support brightness control.
+ Brightness control is supported but hardware blinking is not.
+
config LEDS_TRIGGERS
bool "LED Trigger support"
depends on LEDS_CLASS
obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o
obj-$(CONFIG_LEDS_NET5501) += leds-net5501.o
obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o
-obj-$(CONFIG_LEDS_ALIX2) += leds-alix2.o
obj-$(CONFIG_LEDS_COBALT_QUBE) += leds-cobalt-qube.o
obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-cobalt-raq.o
obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o
obj-$(CONFIG_LEDS_NS2) += leds-ns2.o
obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o
obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o
+obj-$(CONFIG_LEDS_RENESAS_TPU) += leds-renesas-tpu.o
# LED SPI Drivers
obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
+++ /dev/null
-/*
- * LEDs driver for PCEngines ALIX.2 and ALIX.3
- *
- * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
- */
-
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/leds.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/string.h>
-#include <linux/pci.h>
-
-static int force = 0;
-module_param(force, bool, 0444);
-MODULE_PARM_DESC(force, "Assume system has ALIX.2/ALIX.3 style LEDs");
-
-#define MSR_LBAR_GPIO 0x5140000C
-#define CS5535_GPIO_SIZE 256
-
-static u32 gpio_base;
-
-static struct pci_device_id divil_pci[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
- { } /* NULL entry */
-};
-MODULE_DEVICE_TABLE(pci, divil_pci);
-
-struct alix_led {
- struct led_classdev cdev;
- unsigned short port;
- unsigned int on_value;
- unsigned int off_value;
-};
-
-static void alix_led_set(struct led_classdev *led_cdev,
- enum led_brightness brightness)
-{
- struct alix_led *led_dev =
- container_of(led_cdev, struct alix_led, cdev);
-
- if (brightness)
- outl(led_dev->on_value, gpio_base + led_dev->port);
- else
- outl(led_dev->off_value, gpio_base + led_dev->port);
-}
-
-static struct alix_led alix_leds[] = {
- {
- .cdev = {
- .name = "alix:1",
- .brightness_set = alix_led_set,
- },
- .port = 0x00,
- .on_value = 1 << 22,
- .off_value = 1 << 6,
- },
- {
- .cdev = {
- .name = "alix:2",
- .brightness_set = alix_led_set,
- },
- .port = 0x80,
- .on_value = 1 << 25,
- .off_value = 1 << 9,
- },
- {
- .cdev = {
- .name = "alix:3",
- .brightness_set = alix_led_set,
- },
- .port = 0x80,
- .on_value = 1 << 27,
- .off_value = 1 << 11,
- },
-};
-
-static int __init alix_led_probe(struct platform_device *pdev)
-{
- int i;
- int ret;
-
- for (i = 0; i < ARRAY_SIZE(alix_leds); i++) {
- alix_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
- ret = led_classdev_register(&pdev->dev, &alix_leds[i].cdev);
- if (ret < 0)
- goto fail;
- }
- return 0;
-
-fail:
- while (--i >= 0)
- led_classdev_unregister(&alix_leds[i].cdev);
- return ret;
-}
-
-static int alix_led_remove(struct platform_device *pdev)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(alix_leds); i++)
- led_classdev_unregister(&alix_leds[i].cdev);
- return 0;
-}
-
-static struct platform_driver alix_led_driver = {
- .remove = alix_led_remove,
- .driver = {
- .name = KBUILD_MODNAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init alix_present(unsigned long bios_phys,
- const char *alix_sig,
- size_t alix_sig_len)
-{
- const size_t bios_len = 0x00010000;
- const char *bios_virt;
- const char *scan_end;
- const char *p;
- char name[64];
-
- if (force) {
- printk(KERN_NOTICE "%s: forced to skip BIOS test, "
- "assume system has ALIX.2 style LEDs\n",
- KBUILD_MODNAME);
- return 1;
- }
-
- bios_virt = phys_to_virt(bios_phys);
- scan_end = bios_virt + bios_len - (alix_sig_len + 2);
- for (p = bios_virt; p < scan_end; p++) {
- const char *tail;
- char *a;
-
- if (memcmp(p, alix_sig, alix_sig_len) != 0)
- continue;
-
- memcpy(name, p, sizeof(name));
-
- /* remove the first \0 character from string */
- a = strchr(name, '\0');
- if (a)
- *a = ' ';
-
- /* cut the string at a newline */
- a = strchr(name, '\r');
- if (a)
- *a = '\0';
-
- tail = p + alix_sig_len;
- if ((tail[0] == '2' || tail[0] == '3')) {
- printk(KERN_INFO
- "%s: system is recognized as \"%s\"\n",
- KBUILD_MODNAME, name);
- return 1;
- }
- }
-
- return 0;
-}
-
-static struct platform_device *pdev;
-
-static int __init alix_pci_led_init(void)
-{
- u32 low, hi;
-
- if (pci_dev_present(divil_pci) == 0) {
- printk(KERN_WARNING KBUILD_MODNAME": DIVIL not found\n");
- return -ENODEV;
- }
-
- /* Grab the GPIO I/O range */
- rdmsr(MSR_LBAR_GPIO, low, hi);
-
- /* Check the mask and whether GPIO is enabled (sanity check) */
- if (hi != 0x0000f001) {
- printk(KERN_WARNING KBUILD_MODNAME": GPIO not enabled\n");
- return -ENODEV;
- }
-
- /* Mask off the IO base address */
- gpio_base = low & 0x0000ff00;
-
- if (!request_region(gpio_base, CS5535_GPIO_SIZE, KBUILD_MODNAME)) {
- printk(KERN_ERR KBUILD_MODNAME": can't allocate I/O for GPIO\n");
- return -ENODEV;
- }
-
- /* Set GPIO function to output */
- outl(1 << 6, gpio_base + 0x04);
- outl(1 << 9, gpio_base + 0x84);
- outl(1 << 11, gpio_base + 0x84);
-
- return 0;
-}
-
-static int __init alix_led_init(void)
-{
- int ret = -ENODEV;
- const char tinybios_sig[] = "PC Engines ALIX.";
- const char coreboot_sig[] = "PC Engines\0ALIX.";
-
- if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
- alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
- ret = alix_pci_led_init();
-
- if (ret < 0)
- return ret;
-
- pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
- if (!IS_ERR(pdev)) {
- ret = platform_driver_probe(&alix_led_driver, alix_led_probe);
- if (ret)
- platform_device_unregister(pdev);
- } else
- ret = PTR_ERR(pdev);
-
- return ret;
-}
-
-static void __exit alix_led_exit(void)
-{
- platform_device_unregister(pdev);
- platform_driver_unregister(&alix_led_driver);
- release_region(gpio_base, CS5535_GPIO_SIZE);
-}
-
-module_init(alix_led_init);
-module_exit(alix_led_exit);
-
-MODULE_AUTHOR("Constantin Baranov <const@mimas.ru>");
-MODULE_DESCRIPTION("PCEngines ALIX.2 and ALIX.3 LED driver");
-MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * LED control using Renesas TPU
+ *
+ * Copyright (C) 2011 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/printk.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/leds.h>
+#include <linux/leds-renesas-tpu.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+
+enum r_tpu_pin { R_TPU_PIN_UNUSED, R_TPU_PIN_GPIO, R_TPU_PIN_GPIO_FN };
+enum r_tpu_timer { R_TPU_TIMER_UNUSED, R_TPU_TIMER_ON };
+
+struct r_tpu_priv {
+ struct led_classdev ldev;
+ void __iomem *mapbase;
+ struct clk *clk;
+ struct platform_device *pdev;
+ enum r_tpu_pin pin_state;
+ enum r_tpu_timer timer_state;
+ unsigned long min_rate;
+ unsigned int refresh_rate;
+};
+
+static DEFINE_SPINLOCK(r_tpu_lock);
+
+#define TSTR -1 /* Timer start register (shared register) */
+#define TCR 0 /* Timer control register (+0x00) */
+#define TMDR 1 /* Timer mode register (+0x04) */
+#define TIOR 2 /* Timer I/O control register (+0x08) */
+#define TIER 3 /* Timer interrupt enable register (+0x0c) */
+#define TSR 4 /* Timer status register (+0x10) */
+#define TCNT 5 /* Timer counter (+0x14) */
+#define TGRA 6 /* Timer general register A (+0x18) */
+#define TGRB 7 /* Timer general register B (+0x1c) */
+#define TGRC 8 /* Timer general register C (+0x20) */
+#define TGRD 9 /* Timer general register D (+0x24) */
+
+static inline unsigned short r_tpu_read(struct r_tpu_priv *p, int reg_nr)
+{
+ struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
+ void __iomem *base = p->mapbase;
+ unsigned long offs = reg_nr << 2;
+
+ if (reg_nr == TSTR)
+ return ioread16(base - cfg->channel_offset);
+
+ return ioread16(base + offs);
+}
+
+static inline void r_tpu_write(struct r_tpu_priv *p, int reg_nr,
+ unsigned short value)
+{
+ struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
+ void __iomem *base = p->mapbase;
+ unsigned long offs = reg_nr << 2;
+
+ if (reg_nr == TSTR) {
+ iowrite16(value, base - cfg->channel_offset);
+ return;
+ }
+
+ iowrite16(value, base + offs);
+}
+
+static void r_tpu_start_stop_ch(struct r_tpu_priv *p, int start)
+{
+ struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
+ unsigned long flags, value;
+
+ /* start stop register shared by multiple timer channels */
+ spin_lock_irqsave(&r_tpu_lock, flags);
+ value = r_tpu_read(p, TSTR);
+
+ if (start)
+ value |= 1 << cfg->timer_bit;
+ else
+ value &= ~(1 << cfg->timer_bit);
+
+ r_tpu_write(p, TSTR, value);
+ spin_unlock_irqrestore(&r_tpu_lock, flags);
+}
+
+static int r_tpu_enable(struct r_tpu_priv *p, enum led_brightness brightness)
+{
+ struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
+ int prescaler[] = { 1, 4, 16, 64 };
+ int k, ret;
+ unsigned long rate, tmp;
+
+ if (p->timer_state == R_TPU_TIMER_ON)
+ return 0;
+
+ /* wake up device and enable clock */
+ pm_runtime_get_sync(&p->pdev->dev);
+ ret = clk_enable(p->clk);
+ if (ret) {
+ dev_err(&p->pdev->dev, "cannot enable clock\n");
+ return ret;
+ }
+
+ /* make sure channel is disabled */
+ r_tpu_start_stop_ch(p, 0);
+
+ /* get clock rate after enabling it */
+ rate = clk_get_rate(p->clk);
+
+ /* pick the lowest acceptable rate */
+ for (k = 0; k < ARRAY_SIZE(prescaler); k++)
+ if ((rate / prescaler[k]) < p->min_rate)
+ break;
+
+ if (!k) {
+ dev_err(&p->pdev->dev, "clock rate mismatch\n");
+ goto err0;
+ }
+ dev_dbg(&p->pdev->dev, "rate = %lu, prescaler %u\n",
+ rate, prescaler[k - 1]);
+
+ /* clear TCNT on TGRB match, count on rising edge, set prescaler */
+ r_tpu_write(p, TCR, 0x0040 | (k - 1));
+
+ /* output 0 until TGRA, output 1 until TGRB */
+ r_tpu_write(p, TIOR, 0x0002);
+
+ rate /= prescaler[k - 1] * p->refresh_rate;
+ r_tpu_write(p, TGRB, rate);
+ dev_dbg(&p->pdev->dev, "TRGB = 0x%04lx\n", rate);
+
+ tmp = (cfg->max_brightness - brightness) * rate;
+ r_tpu_write(p, TGRA, tmp / cfg->max_brightness);
+ dev_dbg(&p->pdev->dev, "TRGA = 0x%04lx\n", tmp / cfg->max_brightness);
+
+ /* PWM mode */
+ r_tpu_write(p, TMDR, 0x0002);
+
+ /* enable channel */
+ r_tpu_start_stop_ch(p, 1);
+
+ p->timer_state = R_TPU_TIMER_ON;
+ return 0;
+ err0:
+ clk_disable(p->clk);
+ pm_runtime_put_sync(&p->pdev->dev);
+ return -ENOTSUPP;
+}
+
+static void r_tpu_disable(struct r_tpu_priv *p)
+{
+ if (p->timer_state == R_TPU_TIMER_UNUSED)
+ return;
+
+ /* disable channel */
+ r_tpu_start_stop_ch(p, 0);
+
+ /* stop clock and mark device as idle */
+ clk_disable(p->clk);
+ pm_runtime_put_sync(&p->pdev->dev);
+
+ p->timer_state = R_TPU_TIMER_UNUSED;
+}
+
+static void r_tpu_set_pin(struct r_tpu_priv *p, enum r_tpu_pin new_state,
+ enum led_brightness brightness)
+{
+ struct led_renesas_tpu_config *cfg = p->pdev->dev.platform_data;
+
+ if (p->pin_state == new_state) {
+ if (p->pin_state == R_TPU_PIN_GPIO)
+ gpio_set_value(cfg->pin_gpio, brightness);
+ return;
+ }
+
+ if (p->pin_state == R_TPU_PIN_GPIO)
+ gpio_free(cfg->pin_gpio);
+
+ if (p->pin_state == R_TPU_PIN_GPIO_FN)
+ gpio_free(cfg->pin_gpio_fn);
+
+ if (new_state == R_TPU_PIN_GPIO) {
+ gpio_request(cfg->pin_gpio, cfg->name);
+ gpio_direction_output(cfg->pin_gpio, !!brightness);
+ }
+ if (new_state == R_TPU_PIN_GPIO_FN)
+ gpio_request(cfg->pin_gpio_fn, cfg->name);
+
+ p->pin_state = new_state;
+}
+
+static void r_tpu_set_brightness(struct led_classdev *ldev,
+ enum led_brightness brightness)
+{
+ struct r_tpu_priv *p = container_of(ldev, struct r_tpu_priv, ldev);
+
+ r_tpu_disable(p);
+
+ /* off and maximum are handled as GPIO pins, in between PWM */
+ if ((brightness == 0) || (brightness == ldev->max_brightness))
+ r_tpu_set_pin(p, R_TPU_PIN_GPIO, brightness);
+ else {
+ r_tpu_set_pin(p, R_TPU_PIN_GPIO_FN, 0);
+ r_tpu_enable(p, brightness);
+ }
+}
+
+static int __devinit r_tpu_probe(struct platform_device *pdev)
+{
+ struct led_renesas_tpu_config *cfg = pdev->dev.platform_data;
+ struct r_tpu_priv *p;
+ struct resource *res;
+ int ret = -ENXIO;
+
+ if (!cfg) {
+ dev_err(&pdev->dev, "missing platform data\n");
+ goto err0;
+ }
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (p == NULL) {
+ dev_err(&pdev->dev, "failed to allocate driver data\n");
+ ret = -ENOMEM;
+ goto err0;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to get I/O memory\n");
+ goto err1;
+ }
+
+ /* map memory, let mapbase point to our channel */
+ p->mapbase = ioremap_nocache(res->start, resource_size(res));
+ if (p->mapbase == NULL) {
+ dev_err(&pdev->dev, "failed to remap I/O memory\n");
+ goto err1;
+ }
+
+ /* get hold of clock */
+ p->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(p->clk)) {
+ dev_err(&pdev->dev, "cannot get clock\n");
+ ret = PTR_ERR(p->clk);
+ goto err2;
+ }
+
+ p->pdev = pdev;
+ p->pin_state = R_TPU_PIN_UNUSED;
+ p->timer_state = R_TPU_TIMER_UNUSED;
+ p->refresh_rate = cfg->refresh_rate ? cfg->refresh_rate : 100;
+ r_tpu_set_pin(p, R_TPU_PIN_GPIO, LED_OFF);
+ platform_set_drvdata(pdev, p);
+
+
+ p->ldev.name = cfg->name;
+ p->ldev.brightness = LED_OFF;
+ p->ldev.max_brightness = cfg->max_brightness;
+ p->ldev.brightness_set = r_tpu_set_brightness;
+ p->ldev.flags |= LED_CORE_SUSPENDRESUME;
+ ret = led_classdev_register(&pdev->dev, &p->ldev);
+ if (ret < 0)
+ goto err3;
+
+ /* max_brightness may be updated by the LED core code */
+ p->min_rate = p->ldev.max_brightness * p->refresh_rate;
+
+ pm_runtime_enable(&pdev->dev);
+ return 0;
+
+ err3:
+ r_tpu_set_pin(p, R_TPU_PIN_UNUSED, LED_OFF);
+ clk_put(p->clk);
+ err2:
+ iounmap(p->mapbase);
+ err1:
+ kfree(p);
+ err0:
+ return ret;
+}
+
+static int __devexit r_tpu_remove(struct platform_device *pdev)
+{
+ struct r_tpu_priv *p = platform_get_drvdata(pdev);
+
+ r_tpu_set_brightness(&p->ldev, LED_OFF);
+ led_classdev_unregister(&p->ldev);
+ r_tpu_disable(p);
+ r_tpu_set_pin(p, R_TPU_PIN_UNUSED, LED_OFF);
+
+ pm_runtime_disable(&pdev->dev);
+ clk_put(p->clk);
+
+ iounmap(p->mapbase);
+ kfree(p);
+ return 0;
+}
+
+static struct platform_driver r_tpu_device_driver = {
+ .probe = r_tpu_probe,
+ .remove = __devexit_p(r_tpu_remove),
+ .driver = {
+ .name = "leds-renesas-tpu",
+ }
+};
+
+static int __init r_tpu_init(void)
+{
+ return platform_driver_register(&r_tpu_device_driver);
+}
+
+static void __exit r_tpu_exit(void)
+{
+ platform_driver_unregister(&r_tpu_device_driver);
+}
+
+module_init(r_tpu_init);
+module_exit(r_tpu_exit);
+
+MODULE_AUTHOR("Magnus Damm");
+MODULE_DESCRIPTION("Renesas TPU LED Driver");
+MODULE_LICENSE("GPL v2");
int i;
if (lis3->blkread) {
- if (lis3_dev.whoami == WAI_12B) {
+ if (lis3->whoami == WAI_12B) {
u16 data[3];
lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
for (i = 0; i < 3; i++)
static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
/* ODR is Output Data Rate */
-static int lis3lv02d_get_odr(void)
+static int lis3lv02d_get_odr(struct lis3lv02d *lis3)
{
u8 ctrl;
int shift;
- lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
- ctrl &= lis3_dev.odr_mask;
- shift = ffs(lis3_dev.odr_mask) - 1;
- return lis3_dev.odrs[(ctrl >> shift)];
+ lis3->read(&lis3, CTRL_REG1, &ctrl);
+ ctrl &= lis3->odr_mask;
+ shift = ffs(lis3->odr_mask) - 1;
+ return lis3->odrs[(ctrl >> shift)];
}
-static int lis3lv02d_set_odr(int rate)
+static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3)
+{
+ int div = lis3lv02d_get_odr(lis3);
+
+ if (WARN_ONCE(div == 0, "device returned spurious data"))
+ return -ENXIO;
+
+ /* LIS3 power on delay is quite long */
+ msleep(lis3->pwron_delay / div);
+ return 0;
+}
+
+static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate)
{
u8 ctrl;
int i, len, shift;
if (!rate)
return -EINVAL;
- lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
- ctrl &= ~lis3_dev.odr_mask;
- len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
- shift = ffs(lis3_dev.odr_mask) - 1;
+ lis3->read(lis3, CTRL_REG1, &ctrl);
+ ctrl &= ~lis3->odr_mask;
+ len = 1 << hweight_long(lis3->odr_mask); /* # of possible values */
+ shift = ffs(lis3->odr_mask) - 1;
for (i = 0; i < len; i++)
- if (lis3_dev.odrs[i] == rate) {
- lis3_dev.write(&lis3_dev, CTRL_REG1,
+ if (lis3->odrs[i] == rate) {
+ lis3->write(lis3, CTRL_REG1,
ctrl | (i << shift));
return 0;
}
mutex_lock(&lis3->mutex);
irq_cfg = lis3->irq_cfg;
- if (lis3_dev.whoami == WAI_8B) {
+ if (lis3->whoami == WAI_8B) {
lis3->data_ready_count[IRQ_LINE0] = 0;
lis3->data_ready_count[IRQ_LINE1] = 0;
/* Change interrupt cfg to data ready for selftest */
- atomic_inc(&lis3_dev.wake_thread);
+ atomic_inc(&lis3->wake_thread);
lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
(LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
}
- if (lis3_dev.whoami == WAI_3DC) {
+ if (lis3->whoami == WAI_3DC) {
ctlreg = CTRL_REG4;
selftest = CTRL4_ST0;
} else {
ctlreg = CTRL_REG1;
- if (lis3_dev.whoami == WAI_12B)
+ if (lis3->whoami == WAI_12B)
selftest = CTRL1_ST;
else
selftest = CTRL1_STP;
lis3->read(lis3, ctlreg, ®);
lis3->write(lis3, ctlreg, (reg | selftest));
- msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+ ret = lis3lv02d_get_pwron_wait(lis3);
+ if (ret)
+ goto fail;
/* Read directly to avoid axis remap */
x = lis3->read_data(lis3, OUTX);
/* back to normal settings */
lis3->write(lis3, ctlreg, reg);
- msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+ ret = lis3lv02d_get_pwron_wait(lis3);
+ if (ret)
+ goto fail;
results[0] = x - lis3->read_data(lis3, OUTX);
results[1] = y - lis3->read_data(lis3, OUTY);
ret = 0;
- if (lis3_dev.whoami == WAI_8B) {
+ if (lis3->whoami == WAI_8B) {
/* Restore original interrupt configuration */
- atomic_dec(&lis3_dev.wake_thread);
+ atomic_dec(&lis3->wake_thread);
lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
lis3->irq_cfg = irq_cfg;
}
EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
-void lis3lv02d_poweron(struct lis3lv02d *lis3)
+int lis3lv02d_poweron(struct lis3lv02d *lis3)
{
+ int err;
u8 reg;
lis3->init(lis3);
reg |= CTRL2_BOOT_8B;
lis3->write(lis3, CTRL_REG2, reg);
- /* LIS3 power on delay is quite long */
- msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+ err = lis3lv02d_get_pwron_wait(lis3);
+ if (err)
+ return err;
if (lis3->reg_ctrl)
lis3_context_restore(lis3);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
{
+ struct lis3lv02d *lis3 = pidev->private;
int x, y, z;
- mutex_lock(&lis3_dev.mutex);
- lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
+ mutex_lock(&lis3->mutex);
+ lis3lv02d_get_xyz(lis3, &x, &y, &z);
input_report_abs(pidev->input, ABS_X, x);
input_report_abs(pidev->input, ABS_Y, y);
input_report_abs(pidev->input, ABS_Z, z);
input_sync(pidev->input);
- mutex_unlock(&lis3_dev.mutex);
+ mutex_unlock(&lis3->mutex);
}
static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
{
- if (lis3_dev.pm_dev)
- pm_runtime_get_sync(lis3_dev.pm_dev);
+ struct lis3lv02d *lis3 = pidev->private;
- if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev)
- atomic_set(&lis3_dev.wake_thread, 1);
+ if (lis3->pm_dev)
+ pm_runtime_get_sync(lis3->pm_dev);
+
+ if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev)
+ atomic_set(&lis3->wake_thread, 1);
/*
* Update coordinates for the case where poll interval is 0 and
* the chip in running purely under interrupt control
static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
{
- atomic_set(&lis3_dev.wake_thread, 0);
- if (lis3_dev.pm_dev)
- pm_runtime_put(lis3_dev.pm_dev);
+ struct lis3lv02d *lis3 = pidev->private;
+
+ atomic_set(&lis3->wake_thread, 0);
+ if (lis3->pm_dev)
+ pm_runtime_put(lis3->pm_dev);
}
-static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
+static irqreturn_t lis302dl_interrupt(int irq, void *data)
{
- if (!test_bit(0, &lis3_dev.misc_opened))
+ struct lis3lv02d *lis3 = data;
+
+ if (!test_bit(0, &lis3->misc_opened))
goto out;
/*
* the lid is closed. This leads to interrupts as soon as a little move
* is done.
*/
- atomic_inc(&lis3_dev.count);
+ atomic_inc(&lis3->count);
- wake_up_interruptible(&lis3_dev.misc_wait);
- kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
+ wake_up_interruptible(&lis3->misc_wait);
+ kill_fasync(&lis3->async_queue, SIGIO, POLL_IN);
out:
- if (atomic_read(&lis3_dev.wake_thread))
+ if (atomic_read(&lis3->wake_thread))
return IRQ_WAKE_THREAD;
return IRQ_HANDLED;
}
static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
{
- if (test_and_set_bit(0, &lis3_dev.misc_opened))
+ struct lis3lv02d *lis3 = container_of(file->private_data,
+ struct lis3lv02d, miscdev);
+
+ if (test_and_set_bit(0, &lis3->misc_opened))
return -EBUSY; /* already open */
- if (lis3_dev.pm_dev)
- pm_runtime_get_sync(lis3_dev.pm_dev);
+ if (lis3->pm_dev)
+ pm_runtime_get_sync(lis3->pm_dev);
- atomic_set(&lis3_dev.count, 0);
+ atomic_set(&lis3->count, 0);
return 0;
}
static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
{
- fasync_helper(-1, file, 0, &lis3_dev.async_queue);
- clear_bit(0, &lis3_dev.misc_opened); /* release the device */
- if (lis3_dev.pm_dev)
- pm_runtime_put(lis3_dev.pm_dev);
+ struct lis3lv02d *lis3 = container_of(file->private_data,
+ struct lis3lv02d, miscdev);
+
+ fasync_helper(-1, file, 0, &lis3->async_queue);
+ clear_bit(0, &lis3->misc_opened); /* release the device */
+ if (lis3->pm_dev)
+ pm_runtime_put(lis3->pm_dev);
return 0;
}
static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
size_t count, loff_t *pos)
{
+ struct lis3lv02d *lis3 = container_of(file->private_data,
+ struct lis3lv02d, miscdev);
+
DECLARE_WAITQUEUE(wait, current);
u32 data;
unsigned char byte_data;
if (count < 1)
return -EINVAL;
- add_wait_queue(&lis3_dev.misc_wait, &wait);
+ add_wait_queue(&lis3->misc_wait, &wait);
while (true) {
set_current_state(TASK_INTERRUPTIBLE);
- data = atomic_xchg(&lis3_dev.count, 0);
+ data = atomic_xchg(&lis3->count, 0);
if (data)
break;
out:
__set_current_state(TASK_RUNNING);
- remove_wait_queue(&lis3_dev.misc_wait, &wait);
+ remove_wait_queue(&lis3->misc_wait, &wait);
return retval;
}
static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
{
- poll_wait(file, &lis3_dev.misc_wait, wait);
- if (atomic_read(&lis3_dev.count))
+ struct lis3lv02d *lis3 = container_of(file->private_data,
+ struct lis3lv02d, miscdev);
+
+ poll_wait(file, &lis3->misc_wait, wait);
+ if (atomic_read(&lis3->count))
return POLLIN | POLLRDNORM;
return 0;
}
static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
{
- return fasync_helper(fd, file, on, &lis3_dev.async_queue);
+ struct lis3lv02d *lis3 = container_of(file->private_data,
+ struct lis3lv02d, miscdev);
+
+ return fasync_helper(fd, file, on, &lis3->async_queue);
}
static const struct file_operations lis3lv02d_misc_fops = {
.fasync = lis3lv02d_misc_fasync,
};
-static struct miscdevice lis3lv02d_misc_device = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "freefall",
- .fops = &lis3lv02d_misc_fops,
-};
-
-int lis3lv02d_joystick_enable(void)
+int lis3lv02d_joystick_enable(struct lis3lv02d *lis3)
{
struct input_dev *input_dev;
int err;
int max_val, fuzz, flat;
int btns[] = {BTN_X, BTN_Y, BTN_Z};
- if (lis3_dev.idev)
+ if (lis3->idev)
return -EINVAL;
- lis3_dev.idev = input_allocate_polled_device();
- if (!lis3_dev.idev)
+ lis3->idev = input_allocate_polled_device();
+ if (!lis3->idev)
return -ENOMEM;
- lis3_dev.idev->poll = lis3lv02d_joystick_poll;
- lis3_dev.idev->open = lis3lv02d_joystick_open;
- lis3_dev.idev->close = lis3lv02d_joystick_close;
- lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
- lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN;
- lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX;
- input_dev = lis3_dev.idev->input;
+ lis3->idev->poll = lis3lv02d_joystick_poll;
+ lis3->idev->open = lis3lv02d_joystick_open;
+ lis3->idev->close = lis3lv02d_joystick_close;
+ lis3->idev->poll_interval = MDPS_POLL_INTERVAL;
+ lis3->idev->poll_interval_min = MDPS_POLL_MIN;
+ lis3->idev->poll_interval_max = MDPS_POLL_MAX;
+ lis3->idev->private = lis3;
+ input_dev = lis3->idev->input;
input_dev->name = "ST LIS3LV02DL Accelerometer";
input_dev->phys = DRIVER_NAME "/input0";
input_dev->id.bustype = BUS_HOST;
input_dev->id.vendor = 0;
- input_dev->dev.parent = &lis3_dev.pdev->dev;
+ input_dev->dev.parent = &lis3->pdev->dev;
set_bit(EV_ABS, input_dev->evbit);
- max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
- if (lis3_dev.whoami == WAI_12B) {
+ max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY;
+ if (lis3->whoami == WAI_12B) {
fuzz = LIS3_DEFAULT_FUZZ_12B;
flat = LIS3_DEFAULT_FLAT_12B;
} else {
fuzz = LIS3_DEFAULT_FUZZ_8B;
flat = LIS3_DEFAULT_FLAT_8B;
}
- fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
- flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
+ fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY;
+ flat = (flat * lis3->scale) / LIS3_ACCURACY;
input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
- lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns);
- lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns);
- lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns);
+ lis3->mapped_btns[0] = lis3lv02d_get_axis(abs(lis3->ac.x), btns);
+ lis3->mapped_btns[1] = lis3lv02d_get_axis(abs(lis3->ac.y), btns);
+ lis3->mapped_btns[2] = lis3lv02d_get_axis(abs(lis3->ac.z), btns);
- err = input_register_polled_device(lis3_dev.idev);
+ err = input_register_polled_device(lis3->idev);
if (err) {
- input_free_polled_device(lis3_dev.idev);
- lis3_dev.idev = NULL;
+ input_free_polled_device(lis3->idev);
+ lis3->idev = NULL;
}
return err;
}
EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
-void lis3lv02d_joystick_disable(void)
+void lis3lv02d_joystick_disable(struct lis3lv02d *lis3)
{
- if (lis3_dev.irq)
- free_irq(lis3_dev.irq, &lis3_dev);
- if (lis3_dev.pdata && lis3_dev.pdata->irq2)
- free_irq(lis3_dev.pdata->irq2, &lis3_dev);
+ if (lis3->irq)
+ free_irq(lis3->irq, lis3);
+ if (lis3->pdata && lis3->pdata->irq2)
+ free_irq(lis3->pdata->irq2, lis3);
- if (!lis3_dev.idev)
+ if (!lis3->idev)
return;
- if (lis3_dev.irq)
- misc_deregister(&lis3lv02d_misc_device);
- input_unregister_polled_device(lis3_dev.idev);
- input_free_polled_device(lis3_dev.idev);
- lis3_dev.idev = NULL;
+ if (lis3->irq)
+ misc_deregister(&lis3->miscdev);
+ input_unregister_polled_device(lis3->idev);
+ input_free_polled_device(lis3->idev);
+ lis3->idev = NULL;
}
EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
static ssize_t lis3lv02d_selftest_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ struct lis3lv02d *lis3 = dev_get_drvdata(dev);
s16 values[3];
static const char ok[] = "OK";
static const char irq[] = "FAIL_IRQ";
const char *res;
- lis3lv02d_sysfs_poweron(&lis3_dev);
- switch (lis3lv02d_selftest(&lis3_dev, values)) {
+ lis3lv02d_sysfs_poweron(lis3);
+ switch (lis3lv02d_selftest(lis3, values)) {
case SELFTEST_FAIL:
res = fail;
break;
static ssize_t lis3lv02d_position_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ struct lis3lv02d *lis3 = dev_get_drvdata(dev);
int x, y, z;
- lis3lv02d_sysfs_poweron(&lis3_dev);
- mutex_lock(&lis3_dev.mutex);
- lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
- mutex_unlock(&lis3_dev.mutex);
+ lis3lv02d_sysfs_poweron(lis3);
+ mutex_lock(&lis3->mutex);
+ lis3lv02d_get_xyz(lis3, &x, &y, &z);
+ mutex_unlock(&lis3->mutex);
return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
}
static ssize_t lis3lv02d_rate_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- lis3lv02d_sysfs_poweron(&lis3_dev);
- return sprintf(buf, "%d\n", lis3lv02d_get_odr());
+ struct lis3lv02d *lis3 = dev_get_drvdata(dev);
+
+ lis3lv02d_sysfs_poweron(lis3);
+ return sprintf(buf, "%d\n", lis3lv02d_get_odr(lis3));
}
static ssize_t lis3lv02d_rate_set(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
+ struct lis3lv02d *lis3 = dev_get_drvdata(dev);
unsigned long rate;
if (strict_strtoul(buf, 0, &rate))
return -EINVAL;
- lis3lv02d_sysfs_poweron(&lis3_dev);
- if (lis3lv02d_set_odr(rate))
+ lis3lv02d_sysfs_poweron(lis3);
+ if (lis3lv02d_set_odr(lis3, rate))
return -EINVAL;
return count;
if (IS_ERR(lis3->pdev))
return PTR_ERR(lis3->pdev);
+ platform_set_drvdata(lis3->pdev, lis3);
return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
}
/* SYSFS may have left chip running. Turn off if necessary */
if (!pm_runtime_suspended(lis3->pm_dev))
- lis3lv02d_poweroff(&lis3_dev);
+ lis3lv02d_poweroff(lis3);
pm_runtime_disable(lis3->pm_dev);
pm_runtime_set_suspended(lis3->pm_dev);
}
EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
-static void lis3lv02d_8b_configure(struct lis3lv02d *dev,
+static void lis3lv02d_8b_configure(struct lis3lv02d *lis3,
struct lis3lv02d_platform_data *p)
{
int err;
int ctrl2 = p->hipass_ctrl;
if (p->click_flags) {
- dev->write(dev, CLICK_CFG, p->click_flags);
- dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
- dev->write(dev, CLICK_LATENCY, p->click_latency);
- dev->write(dev, CLICK_WINDOW, p->click_window);
- dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
- dev->write(dev, CLICK_THSY_X,
+ lis3->write(lis3, CLICK_CFG, p->click_flags);
+ lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit);
+ lis3->write(lis3, CLICK_LATENCY, p->click_latency);
+ lis3->write(lis3, CLICK_WINDOW, p->click_window);
+ lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf);
+ lis3->write(lis3, CLICK_THSY_X,
(p->click_thresh_x & 0xf) |
(p->click_thresh_y << 4));
- if (dev->idev) {
- struct input_dev *input_dev = lis3_dev.idev->input;
+ if (lis3->idev) {
+ struct input_dev *input_dev = lis3->idev->input;
input_set_capability(input_dev, EV_KEY, BTN_X);
input_set_capability(input_dev, EV_KEY, BTN_Y);
input_set_capability(input_dev, EV_KEY, BTN_Z);
}
if (p->wakeup_flags) {
- dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
- dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
+ lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags);
+ lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
/* pdata value + 1 to keep this backward compatible*/
- dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1);
+ lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1);
ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
}
if (p->wakeup_flags2) {
- dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2);
- dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
+ lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2);
+ lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
/* pdata value + 1 to keep this backward compatible*/
- dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1);
+ lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1);
ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
}
/* Configure hipass filters */
- dev->write(dev, CTRL_REG2, ctrl2);
+ lis3->write(lis3, CTRL_REG2, ctrl2);
if (p->irq2) {
err = request_threaded_irq(p->irq2,
lis302dl_interrupt_thread2_8b,
IRQF_TRIGGER_RISING | IRQF_ONESHOT |
(p->irq_flags2 & IRQF_TRIGGER_MASK),
- DRIVER_NAME, &lis3_dev);
+ DRIVER_NAME, lis3);
if (err < 0)
pr_err("No second IRQ. Limited functionality\n");
}
* Initialise the accelerometer and the various subsystems.
* Should be rather independent of the bus system.
*/
-int lis3lv02d_init_device(struct lis3lv02d *dev)
+int lis3lv02d_init_device(struct lis3lv02d *lis3)
{
int err;
irq_handler_t thread_fn;
int irq_flags = 0;
- dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
+ lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I);
- switch (dev->whoami) {
+ switch (lis3->whoami) {
case WAI_12B:
pr_info("12 bits sensor found\n");
- dev->read_data = lis3lv02d_read_12;
- dev->mdps_max_val = 2048;
- dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
- dev->odrs = lis3_12_rates;
- dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
- dev->scale = LIS3_SENSITIVITY_12B;
- dev->regs = lis3_wai12_regs;
- dev->regs_size = ARRAY_SIZE(lis3_wai12_regs);
+ lis3->read_data = lis3lv02d_read_12;
+ lis3->mdps_max_val = 2048;
+ lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
+ lis3->odrs = lis3_12_rates;
+ lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1;
+ lis3->scale = LIS3_SENSITIVITY_12B;
+ lis3->regs = lis3_wai12_regs;
+ lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs);
break;
case WAI_8B:
pr_info("8 bits sensor found\n");
- dev->read_data = lis3lv02d_read_8;
- dev->mdps_max_val = 128;
- dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
- dev->odrs = lis3_8_rates;
- dev->odr_mask = CTRL1_DR;
- dev->scale = LIS3_SENSITIVITY_8B;
- dev->regs = lis3_wai8_regs;
- dev->regs_size = ARRAY_SIZE(lis3_wai8_regs);
+ lis3->read_data = lis3lv02d_read_8;
+ lis3->mdps_max_val = 128;
+ lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
+ lis3->odrs = lis3_8_rates;
+ lis3->odr_mask = CTRL1_DR;
+ lis3->scale = LIS3_SENSITIVITY_8B;
+ lis3->regs = lis3_wai8_regs;
+ lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs);
break;
case WAI_3DC:
pr_info("8 bits 3DC sensor found\n");
- dev->read_data = lis3lv02d_read_8;
- dev->mdps_max_val = 128;
- dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
- dev->odrs = lis3_3dc_rates;
- dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
- dev->scale = LIS3_SENSITIVITY_8B;
+ lis3->read_data = lis3lv02d_read_8;
+ lis3->mdps_max_val = 128;
+ lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
+ lis3->odrs = lis3_3dc_rates;
+ lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
+ lis3->scale = LIS3_SENSITIVITY_8B;
break;
default:
- pr_err("unknown sensor type 0x%X\n", dev->whoami);
+ pr_err("unknown sensor type 0x%X\n", lis3->whoami);
return -EINVAL;
}
- dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
+ lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
sizeof(lis3_wai12_regs)), GFP_KERNEL);
- if (dev->reg_cache == NULL) {
+ if (lis3->reg_cache == NULL) {
printk(KERN_ERR DRIVER_NAME "out of memory\n");
return -ENOMEM;
}
- mutex_init(&dev->mutex);
- atomic_set(&dev->wake_thread, 0);
+ mutex_init(&lis3->mutex);
+ atomic_set(&lis3->wake_thread, 0);
- lis3lv02d_add_fs(dev);
- lis3lv02d_poweron(dev);
+ lis3lv02d_add_fs(lis3);
+ err = lis3lv02d_poweron(lis3);
+ if (err) {
+ lis3lv02d_remove_fs(lis3);
+ return err;
+ }
- if (dev->pm_dev) {
- pm_runtime_set_active(dev->pm_dev);
- pm_runtime_enable(dev->pm_dev);
+ if (lis3->pm_dev) {
+ pm_runtime_set_active(lis3->pm_dev);
+ pm_runtime_enable(lis3->pm_dev);
}
- if (lis3lv02d_joystick_enable())
+ if (lis3lv02d_joystick_enable(lis3))
pr_err("joystick initialization failed\n");
/* passing in platform specific data is purely optional and only
* used by the SPI transport layer at the moment */
- if (dev->pdata) {
- struct lis3lv02d_platform_data *p = dev->pdata;
+ if (lis3->pdata) {
+ struct lis3lv02d_platform_data *p = lis3->pdata;
- if (dev->whoami == WAI_8B)
- lis3lv02d_8b_configure(dev, p);
+ if (lis3->whoami == WAI_8B)
+ lis3lv02d_8b_configure(lis3, p);
irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
- dev->irq_cfg = p->irq_cfg;
+ lis3->irq_cfg = p->irq_cfg;
if (p->irq_cfg)
- dev->write(dev, CTRL_REG3, p->irq_cfg);
+ lis3->write(lis3, CTRL_REG3, p->irq_cfg);
if (p->default_rate)
- lis3lv02d_set_odr(p->default_rate);
+ lis3lv02d_set_odr(lis3, p->default_rate);
}
/* bail if we did not get an IRQ from the bus layer */
- if (!dev->irq) {
+ if (!lis3->irq) {
pr_debug("No IRQ. Disabling /dev/freefall\n");
goto out;
}
* io-apic is not configurable (and generates a warning) but I keep it
* in case of support for other hardware.
*/
- if (dev->pdata && dev->whoami == WAI_8B)
+ if (lis3->pdata && lis3->whoami == WAI_8B)
thread_fn = lis302dl_interrupt_thread1_8b;
else
thread_fn = NULL;
- err = request_threaded_irq(dev->irq, lis302dl_interrupt,
+ err = request_threaded_irq(lis3->irq, lis302dl_interrupt,
thread_fn,
IRQF_TRIGGER_RISING | IRQF_ONESHOT |
irq_flags,
- DRIVER_NAME, &lis3_dev);
+ DRIVER_NAME, lis3);
if (err < 0) {
pr_err("Cannot get IRQ\n");
goto out;
}
- if (misc_register(&lis3lv02d_misc_device))
+ lis3->miscdev.minor = MISC_DYNAMIC_MINOR;
+ lis3->miscdev.name = "freefall";
+ lis3->miscdev.fops = &lis3lv02d_misc_fops;
+
+ if (misc_register(&lis3->miscdev))
pr_err("misc_register failed\n");
out:
return 0;
#include <linux/platform_device.h>
#include <linux/input-polldev.h>
#include <linux/regulator/consumer.h>
+#include <linux/miscdevice.h>
/*
* This driver tries to support the "digital" accelerometer chips from
struct fasync_struct *async_queue; /* queue for the misc device */
wait_queue_head_t misc_wait; /* Wait queue for the misc device */
unsigned long misc_opened; /* bit0: whether the device is open */
+ struct miscdevice miscdev;
+
int data_ready_count[2];
atomic_t wake_thread;
unsigned char irq_cfg;
};
int lis3lv02d_init_device(struct lis3lv02d *lis3);
-int lis3lv02d_joystick_enable(void);
-void lis3lv02d_joystick_disable(void);
+int lis3lv02d_joystick_enable(struct lis3lv02d *lis3);
+void lis3lv02d_joystick_disable(struct lis3lv02d *lis3);
void lis3lv02d_poweroff(struct lis3lv02d *lis3);
-void lis3lv02d_poweron(struct lis3lv02d *lis3);
+int lis3lv02d_poweron(struct lis3lv02d *lis3);
int lis3lv02d_remove_fs(struct lis3lv02d *lis3);
extern struct lis3lv02d lis3_dev;
if (lis3_dev.reg_ctrl)
lis3_reg_ctrl(&lis3_dev, LIS3_REG_OFF);
- if (ret == 0)
- return 0;
+ if (ret)
+ goto fail2;
+ return 0;
+
+fail2:
+ regulator_bulk_free(ARRAY_SIZE(lis3_dev.regulators),
+ lis3_dev.regulators);
fail:
if (pdata && pdata->release_resources)
pdata->release_resources();
if (pdata && pdata->release_resources)
pdata->release_resources();
- lis3lv02d_joystick_disable();
+ lis3lv02d_joystick_disable(lis3);
lis3lv02d_remove_fs(&lis3_dev);
if (lis3_dev.reg_ctrl)
static int __devexit lis302dl_spi_remove(struct spi_device *spi)
{
struct lis3lv02d *lis3 = spi_get_drvdata(spi);
- lis3lv02d_joystick_disable();
+ lis3lv02d_joystick_disable(lis3);
lis3lv02d_poweroff(lis3);
return lis3lv02d_remove_fs(&lis3_dev);
Support for a led indicating disk protection will be provided as
hp::hddprotect. For more information on the feature, refer to
- Documentation/hwmon/lis3lv02d.
+ Documentation/misc-devices/lis3lv02d.
To compile this driver as a module, choose M here: the module will
be called hp_accel.
{"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
{"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00} },
{"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00} },
+ {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00} },
/* Acer 1810xx */
{"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00} },
{"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00} },
AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
+ AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
+ AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
/* Intel-based HP Pavilion dv5 */
AXIS_DMI_MATCH2("HPDV5_I",
PRODUCT_NAME, "HP Pavilion dv5",
AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
+ AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
{ NULL, }
/* Laptop models without axis info (yet):
INIT_WORK(&hpled_led.work, delayed_set_status_worker);
ret = led_classdev_register(NULL, &hpled_led.led_classdev);
if (ret) {
- lis3lv02d_joystick_disable();
+ lis3lv02d_joystick_disable(&lis3_dev);
lis3lv02d_poweroff(&lis3_dev);
flush_work(&hpled_led.work);
return ret;
if (!device)
return -EINVAL;
- lis3lv02d_joystick_disable();
+ lis3lv02d_joystick_disable(&lis3_dev);
lis3lv02d_poweroff(&lis3_dev);
led_classdev_unregister(&hpled_led.led_classdev);
static int lis3lv02d_resume(struct acpi_device *device)
{
- lis3lv02d_poweron(&lis3_dev);
- return 0;
+ return lis3lv02d_poweron(&lis3_dev);
}
#else
#define lis3lv02d_suspend NULL
If you say yes here you get support for a PPS source connected
with the interrupt pin of your parallel port.
+config PPS_CLIENT_GPIO
+ tristate "PPS client using GPIO"
+ depends on PPS
+ help
+ If you say yes here you get support for a PPS source using
+ GPIO. To be useful you must also register a platform device
+ specifying the GPIO pin and other options, usually in your board
+ setup.
+
endif
obj-$(CONFIG_PPS_CLIENT_KTIMER) += pps-ktimer.o
obj-$(CONFIG_PPS_CLIENT_LDISC) += pps-ldisc.o
obj-$(CONFIG_PPS_CLIENT_PARPORT) += pps_parport.o
+obj-$(CONFIG_PPS_CLIENT_GPIO) += pps-gpio.o
ccflags-$(CONFIG_PPS_DEBUG) := -DDEBUG
--- /dev/null
+/*
+ * pps-gpio.c -- PPS client driver using GPIO
+ *
+ *
+ * Copyright (C) 2010 Ricardo Martins <rasm@fe.up.pt>
+ * Copyright (C) 2011 James Nuss <jamesnuss@nanometrics.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define PPS_GPIO_NAME "pps-gpio"
+#define pr_fmt(fmt) PPS_GPIO_NAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/pps_kernel.h>
+#include <linux/pps-gpio.h>
+#include <linux/gpio.h>
+#include <linux/list.h>
+
+/* Info for each registered platform device */
+struct pps_gpio_device_data {
+ int irq; /* IRQ used as PPS source */
+ struct pps_device *pps; /* PPS source device */
+ struct pps_source_info info; /* PPS source information */
+ const struct pps_gpio_platform_data *pdata;
+};
+
+/*
+ * Report the PPS event
+ */
+
+static irqreturn_t pps_gpio_irq_handler(int irq, void *data)
+{
+ const struct pps_gpio_device_data *info;
+ struct pps_event_time ts;
+ int rising_edge;
+
+ /* Get the time stamp first */
+ pps_get_ts(&ts);
+
+ info = data;
+
+ rising_edge = gpio_get_value(info->pdata->gpio_pin);
+ if ((rising_edge && !info->pdata->assert_falling_edge) ||
+ (!rising_edge && info->pdata->assert_falling_edge))
+ pps_event(info->pps, &ts, PPS_CAPTUREASSERT, NULL);
+ else if (info->pdata->capture_clear &&
+ ((rising_edge && info->pdata->assert_falling_edge) ||
+ (!rising_edge && !info->pdata->assert_falling_edge)))
+ pps_event(info->pps, &ts, PPS_CAPTURECLEAR, NULL);
+
+ return IRQ_HANDLED;
+}
+
+static int pps_gpio_setup(struct platform_device *pdev)
+{
+ int ret;
+ const struct pps_gpio_platform_data *pdata = pdev->dev.platform_data;
+
+ ret = gpio_request(pdata->gpio_pin, pdata->gpio_label);
+ if (ret) {
+ pr_warning("failed to request GPIO %u\n", pdata->gpio_pin);
+ return -EINVAL;
+ }
+
+ ret = gpio_direction_input(pdata->gpio_pin);
+ if (ret) {
+ pr_warning("failed to set pin direction\n");
+ gpio_free(pdata->gpio_pin);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static unsigned long
+get_irqf_trigger_flags(const struct pps_gpio_platform_data *pdata)
+{
+ unsigned long flags = pdata->assert_falling_edge ?
+ IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;
+
+ if (pdata->capture_clear) {
+ flags |= ((flags & IRQF_TRIGGER_RISING) ?
+ IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING);
+ }
+
+ return flags;
+}
+
+static int pps_gpio_probe(struct platform_device *pdev)
+{
+ struct pps_gpio_device_data *data;
+ int irq;
+ int ret;
+ int err;
+ int pps_default_params;
+ const struct pps_gpio_platform_data *pdata = pdev->dev.platform_data;
+
+
+ /* GPIO setup */
+ ret = pps_gpio_setup(pdev);
+ if (ret)
+ return -EINVAL;
+
+ /* IRQ setup */
+ irq = gpio_to_irq(pdata->gpio_pin);
+ if (irq < 0) {
+ pr_err("failed to map GPIO to IRQ: %d\n", irq);
+ err = -EINVAL;
+ goto return_error;
+ }
+
+ /* allocate space for device info */
+ data = kzalloc(sizeof(struct pps_gpio_device_data), GFP_KERNEL);
+ if (data == NULL) {
+ err = -ENOMEM;
+ goto return_error;
+ }
+
+ /* initialize PPS specific parts of the bookkeeping data structure. */
+ data->info.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
+ PPS_ECHOASSERT | PPS_CANWAIT | PPS_TSFMT_TSPEC;
+ if (pdata->capture_clear)
+ data->info.mode |= PPS_CAPTURECLEAR | PPS_OFFSETCLEAR |
+ PPS_ECHOCLEAR;
+ data->info.owner = THIS_MODULE;
+ snprintf(data->info.name, PPS_MAX_NAME_LEN - 1, "%s.%d",
+ pdev->name, pdev->id);
+
+ /* register PPS source */
+ pps_default_params = PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
+ if (pdata->capture_clear)
+ pps_default_params |= PPS_CAPTURECLEAR | PPS_OFFSETCLEAR;
+ data->pps = pps_register_source(&data->info, pps_default_params);
+ if (data->pps == NULL) {
+ kfree(data);
+ pr_err("failed to register IRQ %d as PPS source\n", irq);
+ err = -EINVAL;
+ goto return_error;
+ }
+
+ data->irq = irq;
+ data->pdata = pdata;
+
+ /* register IRQ interrupt handler */
+ ret = request_irq(irq, pps_gpio_irq_handler,
+ get_irqf_trigger_flags(pdata), data->info.name, data);
+ if (ret) {
+ pps_unregister_source(data->pps);
+ kfree(data);
+ pr_err("failed to acquire IRQ %d\n", irq);
+ err = -EINVAL;
+ goto return_error;
+ }
+
+ platform_set_drvdata(pdev, data);
+ dev_info(data->pps->dev, "Registered IRQ %d as PPS source\n", irq);
+
+ return 0;
+
+return_error:
+ gpio_free(pdata->gpio_pin);
+ return err;
+}
+
+static int pps_gpio_remove(struct platform_device *pdev)
+{
+ struct pps_gpio_device_data *data = platform_get_drvdata(pdev);
+ const struct pps_gpio_platform_data *pdata = data->pdata;
+
+ platform_set_drvdata(pdev, NULL);
+ free_irq(data->irq, data);
+ gpio_free(pdata->gpio_pin);
+ pps_unregister_source(data->pps);
+ pr_info("removed IRQ %d as PPS source\n", data->irq);
+ kfree(data);
+ return 0;
+}
+
+static struct platform_driver pps_gpio_driver = {
+ .probe = pps_gpio_probe,
+ .remove = __devexit_p(pps_gpio_remove),
+ .driver = {
+ .name = PPS_GPIO_NAME,
+ .owner = THIS_MODULE
+ },
+};
+
+static int __init pps_gpio_init(void)
+{
+ int ret = platform_driver_register(&pps_gpio_driver);
+ if (ret < 0)
+ pr_err("failed to register platform driver\n");
+ return ret;
+}
+
+static void __exit pps_gpio_exit(void)
+{
+ platform_driver_unregister(&pps_gpio_driver);
+ pr_debug("unregistered platform driver\n");
+}
+
+module_init(pps_gpio_init);
+module_exit(pps_gpio_exit);
+
+MODULE_AUTHOR("Ricardo Martins <rasm@fe.up.pt>");
+MODULE_AUTHOR("James Nuss <jamesnuss@nanometrics.ca>");
+MODULE_DESCRIPTION("Use GPIO pin as PPS source");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0.0");
mod_timer(&ktimer, jiffies + HZ);
}
-/*
- * The echo function
- */
-
-static void pps_ktimer_echo(struct pps_device *pps, int event, void *data)
-{
- dev_info(pps->dev, "echo %s %s\n",
- event & PPS_CAPTUREASSERT ? "assert" : "",
- event & PPS_CAPTURECLEAR ? "clear" : "");
-}
-
/*
* The PPS info struct
*/
.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
PPS_ECHOASSERT |
PPS_CANWAIT | PPS_TSFMT_TSPEC,
- .echo = pps_ktimer_echo,
.owner = THIS_MODULE,
};
return;
}
-/* the PPS echo function */
-static void pps_echo(struct pps_device *pps, int event, void *data)
-{
- dev_info(pps->dev, "echo %s %s\n",
- event & PPS_CAPTUREASSERT ? "assert" : "",
- event & PPS_CAPTURECLEAR ? "clear" : "");
-}
-
static void parport_attach(struct parport *port)
{
struct pps_client_pp *device;
PPS_OFFSETASSERT | PPS_OFFSETCLEAR | \
PPS_ECHOASSERT | PPS_ECHOCLEAR | \
PPS_CANWAIT | PPS_TSFMT_TSPEC,
- .echo = pps_echo,
.owner = THIS_MODULE,
.dev = NULL
};
ts->sec += offset->sec;
}
+static void pps_echo_client_default(struct pps_device *pps, int event,
+ void *data)
+{
+ dev_info(pps->dev, "echo %s %s\n",
+ event & PPS_CAPTUREASSERT ? "assert" : "",
+ event & PPS_CAPTURECLEAR ? "clear" : "");
+}
+
/*
* Exported functions
*/
err = -EINVAL;
goto pps_register_source_exit;
}
- if ((info->mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) != 0 &&
- info->echo == NULL) {
- pr_err("%s: echo function is not defined\n",
- info->name);
- err = -EINVAL;
- goto pps_register_source_exit;
- }
if ((info->mode & (PPS_TSFMT_TSPEC | PPS_TSFMT_NTPFP)) == 0) {
pr_err("%s: unspecified time format\n",
info->name);
pps->params.mode = default_params;
pps->info = *info;
+ /* check for default echo function */
+ if ((pps->info.mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) &&
+ pps->info.echo == NULL)
+ pps->info.echo = pps_echo_client_default;
+
init_waitqueue_head(&pps->queue);
spin_lock_init(&pps->lock);
#include "rtc-core.h"
-static DEFINE_IDR(rtc_idr);
-static DEFINE_MUTEX(idr_lock);
+static DEFINE_IDA(rtc_ida);
struct class *rtc_class;
static void rtc_device_release(struct device *dev)
{
struct rtc_device *rtc = to_rtc_device(dev);
- mutex_lock(&idr_lock);
- idr_remove(&rtc_idr, rtc->id);
- mutex_unlock(&idr_lock);
+ ida_simple_remove(&rtc_ida, rtc->id);
kfree(rtc);
}
struct rtc_wkalrm alrm;
int id, err;
- if (idr_pre_get(&rtc_idr, GFP_KERNEL) == 0) {
- err = -ENOMEM;
+ id = ida_simple_get(&rtc_ida, 0, 0, GFP_KERNEL);
+ if (id < 0) {
+ err = id;
goto exit;
}
-
- mutex_lock(&idr_lock);
- err = idr_get_new(&rtc_idr, NULL, &id);
- mutex_unlock(&idr_lock);
-
- if (err < 0)
- goto exit;
-
- id = id & MAX_ID_MASK;
-
rtc = kzalloc(sizeof(struct rtc_device), GFP_KERNEL);
if (rtc == NULL) {
err = -ENOMEM;
- goto exit_idr;
+ goto exit_ida;
}
rtc->id = id;
exit_kfree:
kfree(rtc);
-exit_idr:
- mutex_lock(&idr_lock);
- idr_remove(&rtc_idr, id);
- mutex_unlock(&idr_lock);
+exit_ida:
+ ida_simple_remove(&rtc_ida, id);
exit:
dev_err(dev, "rtc core: unable to register %s, err = %d\n",
{
rtc_dev_exit();
class_destroy(rtc_class);
- idr_destroy(&rtc_idr);
+ ida_destroy(&rtc_ida);
}
subsys_initcall(rtc_init);
AAC_OPT_NEW_COMM) ?
(dev->scsi_host_ptr->max_sectors << 9) :
65536)) {
+ kfree(usg);
rcode = -EINVAL;
goto cleanup;
}
if (adapter->product_info.subsysvid == HP_SUBSYS_VID) {
sprintf (adapter->fw_version, "%c%d%d.%d%d",
adapter->product_info.fw_version[2],
- adapter->product_info.fw_version[1] >> 8,
+ adapter->product_info.fw_version[1] >> 4,
adapter->product_info.fw_version[1] & 0x0f,
- adapter->product_info.fw_version[0] >> 8,
+ adapter->product_info.fw_version[0] >> 4,
adapter->product_info.fw_version[0] & 0x0f);
sprintf (adapter->bios_version, "%c%d%d.%d%d",
adapter->product_info.bios_version[2],
- adapter->product_info.bios_version[1] >> 8,
+ adapter->product_info.bios_version[1] >> 4,
adapter->product_info.bios_version[1] & 0x0f,
- adapter->product_info.bios_version[0] >> 8,
+ adapter->product_info.bios_version[0] >> 4,
adapter->product_info.bios_version[0] & 0x0f);
} else {
memcpy(adapter->fw_version,
if (oud->disk)
put_disk(oud->disk);
- ida_remove(&osd_minor_ida, oud->minor);
+ ida_simple_remove(&osd_minor_ida, oud->minor);
kfree(oud);
}
if (scsi_device->type != TYPE_OSD)
return -ENODEV;
- do {
- if (!ida_pre_get(&osd_minor_ida, GFP_KERNEL))
- return -ENODEV;
-
- error = ida_get_new(&osd_minor_ida, &minor);
- } while (error == -EAGAIN);
-
- if (error)
- return error;
- if (minor >= SCSI_OSD_MAX_MINOR) {
- error = -EBUSY;
- goto err_retract_minor;
+ minor = ida_simple_get(&osd_minor_ida, 0,
+ SCSI_OSD_MAX_MINOR, GFP_KERNEL);
+ if (minor < 0) {
+ if (minor == -ENOSPC)
+ return -EBUSY;
+ return minor;
}
error = -ENOMEM;
dev_set_drvdata(dev, NULL);
kfree(oud);
err_retract_minor:
- ida_remove(&osd_minor_ida, minor);
+ ida_simple_remove(&osd_minor_ida, minor);
return error;
}
static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
static void sd_print_result(struct scsi_disk *, int);
-static DEFINE_SPINLOCK(sd_index_lock);
static DEFINE_IDA(sd_index_ida);
/* This semaphore is used to mediate the 0->1 reference get in the
if (!gd)
goto out_free;
- do {
- if (!ida_pre_get(&sd_index_ida, GFP_KERNEL))
- goto out_put;
-
- spin_lock(&sd_index_lock);
- error = ida_get_new(&sd_index_ida, &index);
- spin_unlock(&sd_index_lock);
- } while (error == -EAGAIN);
-
- if (error)
+ index = ida_simple_get(&sd_index_ida, 0, SD_MAX_DISKS, GFP_KERNEL);
+ if (index < 0) {
+ error = index;
+ if (error == -ENOSPC) {
+ sdev_printk(KERN_WARNING, sdp,
+ "SCSI disk (sd) name space exhausted.\n");
+ error = -ENODEV;
+ }
goto out_put;
-
- if (index >= SD_MAX_DISKS) {
- error = -ENODEV;
- sdev_printk(KERN_WARNING, sdp, "SCSI disk (sd) name space exhausted.\n");
- goto out_free_index;
}
error = sd_format_disk_name("sd", index, gd->disk_name, DISK_NAME_LEN);
return 0;
out_free_index:
- spin_lock(&sd_index_lock);
- ida_remove(&sd_index_ida, index);
- spin_unlock(&sd_index_lock);
+ ida_simple_remove(&sd_index_ida, index);
out_put:
put_disk(gd);
out_free:
struct scsi_disk *sdkp = to_scsi_disk(dev);
struct gendisk *disk = sdkp->disk;
- spin_lock(&sd_index_lock);
- ida_remove(&sd_index_ida, sdkp->index);
- spin_unlock(&sd_index_lock);
+ ida_simple_remove(&sd_index_ida, sdkp->index);
disk->private_data = NULL;
put_disk(disk);
sg_proc_write_adio(struct file *filp, const char __user *buffer,
size_t count, loff_t *off)
{
- int num;
- char buff[11];
+ int err;
+ unsigned long num;
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
- num = (count < 10) ? count : 10;
- if (copy_from_user(buff, buffer, num))
- return -EFAULT;
- buff[num] = '\0';
- sg_allow_dio = simple_strtoul(buff, NULL, 10) ? 1 : 0;
+ err = kstrtoul_from_user(buffer, count, 0, &num);
+ if (err)
+ return err;
+ sg_allow_dio = num ? 1 : 0;
return count;
}
sg_proc_write_dressz(struct file *filp, const char __user *buffer,
size_t count, loff_t *off)
{
- int num;
+ int err;
unsigned long k = ULONG_MAX;
- char buff[11];
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
- num = (count < 10) ? count : 10;
- if (copy_from_user(buff, buffer, num))
- return -EFAULT;
- buff[num] = '\0';
- k = simple_strtoul(buff, NULL, 10);
+
+ err = kstrtoul_from_user(buffer, count, 0, &k);
+ if (err)
+ return err;
if (k <= 1048576) { /* limit "big buff" to 1 MB */
sg_big_buff = k;
return count;
case FBIOPUT_VSCREENINFO:
if (copy_from_user(&var, argp, sizeof(var)))
return -EFAULT;
- if (!lock_fb_info(info))
- return -ENODEV;
console_lock();
+ if (!lock_fb_info(info)) {
+ console_unlock();
+ return -ENODEV;
+ }
info->flags |= FBINFO_MISC_USEREVENT;
ret = fb_set_var(info, &var);
info->flags &= ~FBINFO_MISC_USEREVENT;
- console_unlock();
unlock_fb_info(info);
+ console_unlock();
if (!ret && copy_to_user(argp, &var, sizeof(var)))
ret = -EFAULT;
break;
case FBIOPAN_DISPLAY:
if (copy_from_user(&var, argp, sizeof(var)))
return -EFAULT;
- if (!lock_fb_info(info))
- return -ENODEV;
console_lock();
+ if (!lock_fb_info(info)) {
+ console_unlock();
+ return -ENODEV;
+ }
ret = fb_pan_display(info, &var);
- console_unlock();
unlock_fb_info(info);
+ console_unlock();
if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
return -EFAULT;
break;
unlock_fb_info(info);
break;
case FBIOBLANK:
- if (!lock_fb_info(info))
- return -ENODEV;
console_lock();
+ if (!lock_fb_info(info)) {
+ console_unlock();
+ return -ENODEV;
+ }
info->flags |= FBINFO_MISC_USEREVENT;
ret = fb_blank(info, arg);
info->flags &= ~FBINFO_MISC_USEREVENT;
- console_unlock();
unlock_fb_info(info);
+ console_unlock();
break;
default:
if (!lock_fb_info(info))
.read = w1_ds2760_read_bin,
};
-static DEFINE_IDR(bat_idr);
-static DEFINE_MUTEX(bat_idr_lock);
-
-static int new_bat_id(void)
-{
- int ret;
-
- while (1) {
- int id;
-
- ret = idr_pre_get(&bat_idr, GFP_KERNEL);
- if (ret == 0)
- return -ENOMEM;
-
- mutex_lock(&bat_idr_lock);
- ret = idr_get_new(&bat_idr, NULL, &id);
- mutex_unlock(&bat_idr_lock);
-
- if (ret == 0) {
- ret = id & MAX_ID_MASK;
- break;
- } else if (ret == -EAGAIN) {
- continue;
- } else {
- break;
- }
- }
-
- return ret;
-}
-
-static void release_bat_id(int id)
-{
- mutex_lock(&bat_idr_lock);
- idr_remove(&bat_idr, id);
- mutex_unlock(&bat_idr_lock);
-}
+static DEFINE_IDA(bat_ida);
static int w1_ds2760_add_slave(struct w1_slave *sl)
{
int id;
struct platform_device *pdev;
- id = new_bat_id();
+ id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
ret = id;
goto noid;
pdev_add_failed:
platform_device_unregister(pdev);
pdev_alloc_failed:
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
noid:
success:
return ret;
int id = pdev->id;
platform_device_unregister(pdev);
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2760_bin_attr);
}
{
printk(KERN_INFO "1-Wire driver for the DS2760 battery monitor "
" chip - (c) 2004-2005, Szabolcs Gyurko\n");
- idr_init(&bat_idr);
+ ida_init(&bat_ida);
return w1_register_family(&w1_ds2760_family);
}
static void __exit w1_ds2760_exit(void)
{
w1_unregister_family(&w1_ds2760_family);
- idr_destroy(&bat_idr);
+ ida_destroy(&bat_ida);
}
EXPORT_SYMBOL(w1_ds2760_read);
.read = w1_ds2780_read_bin,
};
-static DEFINE_IDR(bat_idr);
-static DEFINE_MUTEX(bat_idr_lock);
-
-static int new_bat_id(void)
-{
- int ret;
-
- while (1) {
- int id;
-
- ret = idr_pre_get(&bat_idr, GFP_KERNEL);
- if (ret == 0)
- return -ENOMEM;
-
- mutex_lock(&bat_idr_lock);
- ret = idr_get_new(&bat_idr, NULL, &id);
- mutex_unlock(&bat_idr_lock);
-
- if (ret == 0) {
- ret = id & MAX_ID_MASK;
- break;
- } else if (ret == -EAGAIN) {
- continue;
- } else {
- break;
- }
- }
-
- return ret;
-}
-
-static void release_bat_id(int id)
-{
- mutex_lock(&bat_idr_lock);
- idr_remove(&bat_idr, id);
- mutex_unlock(&bat_idr_lock);
-}
+static DEFINE_IDA(bat_ida);
static int w1_ds2780_add_slave(struct w1_slave *sl)
{
int id;
struct platform_device *pdev;
- id = new_bat_id();
+ id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
ret = id;
goto noid;
pdev_add_failed:
platform_device_unregister(pdev);
pdev_alloc_failed:
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
noid:
return ret;
}
int id = pdev->id;
platform_device_unregister(pdev);
- release_bat_id(id);
+ ida_simple_remove(&bat_ida, id);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2780_bin_attr);
}
static int __init w1_ds2780_init(void)
{
- idr_init(&bat_idr);
+ ida_init(&bat_ida);
return w1_register_family(&w1_ds2780_family);
}
static void __exit w1_ds2780_exit(void)
{
w1_unregister_family(&w1_ds2780_family);
- idr_destroy(&bat_idr);
+ ida_destroy(&bat_ida);
}
module_init(w1_ds2780_init);
ret = compat_rw_copy_check_uvector(type,
(struct compat_iovec __user *)kiocb->ki_buf,
kiocb->ki_nbytes, 1, &kiocb->ki_inline_vec,
- &kiocb->ki_iovec);
+ &kiocb->ki_iovec, 1);
else
#endif
ret = rw_copy_check_uvector(type,
(struct iovec __user *)kiocb->ki_buf,
kiocb->ki_nbytes, 1, &kiocb->ki_inline_vec,
- &kiocb->ki_iovec);
+ &kiocb->ki_iovec, 1);
if (ret < 0)
goto out;
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, failrec->len);
- if (em->start > start || em->start + em->len < start) {
+ if (em && !IS_ERR(em) && (em->start > start ||
+ em->start + em->len < start)) {
free_extent_map(em);
em = NULL;
}
ssize_t compat_rw_copy_check_uvector(int type,
const struct compat_iovec __user *uvector, unsigned long nr_segs,
unsigned long fast_segs, struct iovec *fast_pointer,
- struct iovec **ret_pointer)
+ struct iovec **ret_pointer, int check_access)
{
compat_ssize_t tot_len;
struct iovec *iov = *ret_pointer = fast_pointer;
}
if (len < 0) /* size_t not fitting in compat_ssize_t .. */
goto out;
- if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
+ if (check_access &&
+ !access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
ret = -EFAULT;
goto out;
}
goto out;
tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs,
- UIO_FASTIOV, iovstack, &iov);
+ UIO_FASTIOV, iovstack, &iov, 1);
if (tot_len == 0) {
ret = 0;
goto out;
#define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \
EXT4_MOUNT2_##opt)
-#define ext4_set_bit __test_and_set_bit_le
+#define ext4_test_and_set_bit __test_and_set_bit_le
+#define ext4_set_bit __set_bit_le
#define ext4_set_bit_atomic ext2_set_bit_atomic
-#define ext4_clear_bit __test_and_clear_bit_le
+#define ext4_test_and_clear_bit __test_and_clear_bit_le
+#define ext4_clear_bit __clear_bit_le
#define ext4_clear_bit_atomic ext2_clear_bit_atomic
#define ext4_test_bit test_bit_le
-#define ext4_find_first_zero_bit find_first_zero_bit_le
#define ext4_find_next_zero_bit find_next_zero_bit_le
#define ext4_find_next_bit find_next_bit_le
fatal = ext4_journal_get_write_access(handle, bh2);
}
ext4_lock_group(sb, block_group);
- cleared = ext4_clear_bit(bit, bitmap_bh->b_data);
+ cleared = ext4_test_and_clear_bit(bit, bitmap_bh->b_data);
if (fatal || !cleared) {
ext4_unlock_group(sb, block_group);
goto out;
*/
down_read(&grp->alloc_sem);
ext4_lock_group(sb, group);
- if (ext4_set_bit(ino, inode_bitmap_bh->b_data)) {
+ if (ext4_test_and_set_bit(ino, inode_bitmap_bh->b_data)) {
/* not a free inode */
retval = 1;
goto err_ret;
#define ocfs2_test_bit test_bit_le
#define ocfs2_find_next_zero_bit find_next_zero_bit_le
#define ocfs2_find_next_bit find_next_bit_le
+
+static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
+{
+#if BITS_PER_LONG == 64
+ *bit += ((unsigned long) addr & 7UL) << 3;
+ addr = (void *) ((unsigned long) addr & ~7UL);
+#elif BITS_PER_LONG == 32
+ *bit += ((unsigned long) addr & 3UL) << 3;
+ addr = (void *) ((unsigned long) addr & ~3UL);
+#else
+#error "how many bits you are?!"
+#endif
+ return addr;
+}
+
+static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
+{
+ bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
+ ocfs2_set_bit(bit, bitmap);
+}
+
+static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
+{
+ bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
+ ocfs2_clear_bit(bit, bitmap);
+}
+
+static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
+{
+ bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
+ return ocfs2_test_bit(bit, bitmap);
+}
+
+static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
+ int start)
+{
+ int fix = 0, ret, tmpmax;
+ bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
+ tmpmax = max + fix;
+ start += fix;
+
+ ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
+ if (ret > max)
+ return max;
+ return ret;
+}
+
#endif /* OCFS2_H */
goto out_commit;
}
lock_buffer(qbh);
- WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
- ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
+ WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
+ ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
le32_add_cpu(&dchunk->dqc_free, 1);
unlock_buffer(qbh);
ocfs2_journal_dirty(handle, qbh);
* ol_quota_entries_per_block(sb);
}
- found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
+ found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
/* We failed? */
if (found == len) {
mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
struct ocfs2_local_disk_chunk *dchunk;
dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
- ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
+ ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
le32_add_cpu(&dchunk->dqc_free, -1);
}
(od->dq_chunk->qc_headerbh->b_data);
/* Mark structure as freed */
lock_buffer(od->dq_chunk->qc_headerbh);
- ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
+ ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
le32_add_cpu(&dchunk->dqc_free, 1);
unlock_buffer(od->dq_chunk->qc_headerbh);
ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
unsigned long nr_segs, unsigned long fast_segs,
struct iovec *fast_pointer,
- struct iovec **ret_pointer)
+ struct iovec **ret_pointer,
+ int check_access)
{
unsigned long seg;
ssize_t ret;
ret = -EINVAL;
goto out;
}
- if (unlikely(!access_ok(vrfy_dir(type), buf, len))) {
+ if (check_access
+ && unlikely(!access_ok(vrfy_dir(type), buf, len))) {
ret = -EFAULT;
goto out;
}
}
ret = rw_copy_check_uvector(type, uvector, nr_segs,
- ARRAY_SIZE(iovstack), iovstack, &iov);
+ ARRAY_SIZE(iovstack), iovstack, &iov, 1);
if (ret <= 0)
goto out;
const struct compat_iovec __user *uvector,
unsigned long nr_segs,
unsigned long fast_segs, struct iovec *fast_pointer,
- struct iovec **ret_pointer);
+ struct iovec **ret_pointer,
+ int check_access);
extern void __user *compat_alloc_user_space(unsigned long len);
* fails
* @fixup_free: fixup function, which is called when the free check
* fails
+ * @fixup_assert_init: fixup function, which is called when the assert_init
+ * check fails
*/
struct debug_obj_descr {
const char *name;
int (*fixup_activate) (void *addr, enum debug_obj_state state);
int (*fixup_destroy) (void *addr, enum debug_obj_state state);
int (*fixup_free) (void *addr, enum debug_obj_state state);
+ int (*fixup_assert_init)(void *addr, enum debug_obj_state state);
};
#ifdef CONFIG_DEBUG_OBJECTS
extern void debug_object_deactivate(void *addr, struct debug_obj_descr *descr);
extern void debug_object_destroy (void *addr, struct debug_obj_descr *descr);
extern void debug_object_free (void *addr, struct debug_obj_descr *descr);
+extern void debug_object_assert_init(void *addr, struct debug_obj_descr *descr);
/*
* Active state:
debug_object_destroy (void *addr, struct debug_obj_descr *descr) { }
static inline void
debug_object_free (void *addr, struct debug_obj_descr *descr) { }
+static inline void
+debug_object_assert_init(void *addr, struct debug_obj_descr *descr) { }
static inline void debug_objects_early_init(void) { }
static inline void debug_objects_mem_init(void) { }
#define for_each_rmrr_units(rmrr) \
list_for_each_entry(rmrr, &dmar_rmrr_units, list)
+extern struct list_head dmar_atsr_units;
struct dmar_atsr_unit {
struct list_head list; /* list of ATSR units */
struct acpi_dmar_header *hdr; /* ACPI header */
struct pci_dev **devices; /* target devices */
int devices_cnt; /* target device count */
+ u16 segment; /* PCI domain */
u8 include_all:1; /* include all ports */
};
+#define for_each_atsr_unit(atsr) \
+ list_for_each_entry(atsr, &dmar_atsr_units, list)
+
extern int intel_iommu_init(void);
#else /* !CONFIG_DMAR: */
static inline int intel_iommu_init(void) { return -ENODEV; }
struct seq_file;
ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
- unsigned long nr_segs, unsigned long fast_segs,
- struct iovec *fast_pointer,
- struct iovec **ret_pointer);
+ unsigned long nr_segs, unsigned long fast_segs,
+ struct iovec *fast_pointer,
+ struct iovec **ret_pointer,
+ int check_access);
extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
#define HPET_EPI _IO('h', 0x04) /* enable periodic */
#define HPET_DPI _IO('h', 0x05) /* disable periodic */
#define HPET_IRQFREQ _IOW('h', 0x6, unsigned long) /* IRQFREQ usec */
+#define HPET_ALLOC_TIMER _IO('h', 0x7)
#define MAX_HPET_TBS 8 /* maximum hpet timer blocks */
extern unsigned long timeval_to_jiffies(const struct timeval *value);
extern void jiffies_to_timeval(const unsigned long jiffies,
struct timeval *value);
-extern clock_t jiffies_to_clock_t(long x);
+extern clock_t jiffies_to_clock_t(unsigned long x);
extern unsigned long clock_t_to_jiffies(unsigned long x);
extern u64 jiffies_64_to_clock_t(u64 x);
extern u64 nsec_to_clock_t(u64 x);
--- /dev/null
+#ifndef __LEDS_RENESAS_TPU_H__
+#define __LEDS_RENESAS_TPU_H__
+
+struct led_renesas_tpu_config {
+ char *name;
+ unsigned pin_gpio_fn;
+ unsigned pin_gpio;
+ unsigned int channel_offset;
+ unsigned int timer_bit;
+ unsigned int max_brightness;
+ unsigned int refresh_rate;
+};
+
+#endif /* __LEDS_RENESAS_TPU_H__ */
#define ANON_INODE_FS_MAGIC 0x09041934
#define PSTOREFS_MAGIC 0x6165676C
-#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
-#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
-#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
-#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
-#define MINIX3_SUPER_MAGIC 0x4d5a /* minix V3 fs */
+#define MINIX_SUPER_MAGIC 0x137F /* minix v1 fs, 14 char names */
+#define MINIX_SUPER_MAGIC2 0x138F /* minix v1 fs, 30 char names */
+#define MINIX2_SUPER_MAGIC 0x2468 /* minix v2 fs, 14 char names */
+#define MINIX2_SUPER_MAGIC2 0x2478 /* minix v2 fs, 30 char names */
+#define MINIX3_SUPER_MAGIC 0x4d5a /* minix v3 fs, 60 char names */
#define MSDOS_SUPER_MAGIC 0x4d44 /* MD */
#define NCP_SUPER_MAGIC 0x564c /* Guess, what 0x564c is :-) */
extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,
- int mode, struct zone *z,
+ isolate_mode_t mode,
+ struct zone *z,
struct mem_cgroup *mem_cont,
int active, int file);
#define LRU_ALL_EVICTABLE (LRU_ALL_FILE | LRU_ALL_ANON)
#define LRU_ALL ((1 << NR_LRU_LISTS) - 1)
+/* Isolate inactive pages */
+#define ISOLATE_INACTIVE ((__force fmode_t)0x1)
+/* Isolate active pages */
+#define ISOLATE_ACTIVE ((__force fmode_t)0x2)
+/* Isolate clean file */
+#define ISOLATE_CLEAN ((__force fmode_t)0x4)
+/* Isolate unmapped file */
+#define ISOLATE_UNMAPPED ((__force fmode_t)0x8)
+
+/* LRU Isolation modes. */
+typedef unsigned __bitwise__ isolate_mode_t;
+
enum zone_watermarks {
WMARK_MIN,
WMARK_LOW,
--- /dev/null
+/*
+ * pps-gpio.h -- PPS client for GPIOs
+ *
+ *
+ * Copyright (C) 2011 James Nuss <jamesnuss@nanometrics.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _PPS_GPIO_H
+#define _PPS_GPIO_H
+
+struct pps_gpio_platform_data {
+ bool assert_falling_edge;
+ bool capture_clear;
+ unsigned int gpio_pin;
+ const char *gpio_label;
+};
+
+#endif
__lru_cache_add(page, LRU_INACTIVE_FILE);
}
-/* LRU Isolation modes. */
-#define ISOLATE_INACTIVE 0 /* Isolate inactive pages. */
-#define ISOLATE_ACTIVE 1 /* Isolate active pages. */
-#define ISOLATE_BOTH 2 /* Isolate both active and inactive pages. */
-
/* linux/mm/vmscan.c */
extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
gfp_t gfp_mask, nodemask_t *mask);
-extern int __isolate_lru_page(struct page *page, int mode, int file);
+extern int __isolate_lru_page(struct page *page, isolate_mode_t mode, int file);
extern unsigned long shrink_all_memory(unsigned long nr_pages);
extern int vm_swappiness;
extern int remove_mapping(struct address_space *mapping, struct page *page);
struct file_handle __user *handle,
int flags);
asmlinkage long sys_setns(int fd, int nstype);
+asmlinkage long sys_process_vm_readv(pid_t pid,
+ const struct iovec __user *lvec,
+ unsigned long liovcnt,
+ const struct iovec __user *rvec,
+ unsigned long riovcnt,
+ unsigned long flags);
+asmlinkage long sys_process_vm_writev(pid_t pid,
+ const struct iovec __user *lvec,
+ unsigned long liovcnt,
+ const struct iovec __user *rvec,
+ unsigned long riovcnt,
+ unsigned long flags);
+
#endif
void __user *, size_t *, loff_t *);
extern int proc_dointvec_minmax(struct ctl_table *, int,
void __user *, size_t *, loff_t *);
+extern int proc_dointvec_bool(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *);
+extern int proc_dointvec_unsigned(struct ctl_table *, int,
+ void __user *, size_t *, loff_t *);
extern int proc_dointvec_jiffies(struct ctl_table *, int,
void __user *, size_t *, loff_t *);
extern int proc_dointvec_userhz_jiffies(struct ctl_table *, int,
extern int block_dump;
extern int laptop_mode;
-extern unsigned long determine_dirtyable_memory(void);
-
extern int dirty_background_ratio_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos);
#define SCSI_NETLINK_H
#include <linux/netlink.h>
-
+#include <linux/types.h>
/*
* This file intended to be included by both kernel and user space
--- /dev/null
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM irq_vectors
+
+#if !defined(_TRACE_IRQ_VECTORS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IRQ_VECTORS_H
+
+#include <linux/tracepoint.h>
+#include <asm/irq.h>
+
+#ifndef irq_vector_name_table
+#define irq_vector_name_table { -1, NULL }
+#endif
+
+DECLARE_EVENT_CLASS(irq_vector,
+
+ TP_PROTO(int irq),
+
+ TP_ARGS(irq),
+
+ TP_STRUCT__entry(
+ __field( int, irq )
+ ),
+
+ TP_fast_assign(
+ __entry->irq = irq;
+ ),
+
+ TP_printk("irq=%d name=%s", __entry->irq,
+ __print_symbolic(__entry->irq, irq_vector_name_table))
+);
+
+/*
+ * irq_vector_entry - called before enterring a interrupt vector handler
+ */
+DEFINE_EVENT(irq_vector, irq_vector_entry,
+
+ TP_PROTO(int irq),
+
+ TP_ARGS(irq)
+);
+
+/*
+ * irq_vector_exit - called immediately after the interrupt vector
+ * handler returns
+ */
+DEFINE_EVENT(irq_vector, irq_vector_exit,
+
+ TP_PROTO(int irq),
+
+ TP_ARGS(irq)
+);
+
+#endif /* _TRACE_IRQ_VECTORS_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
unsigned long nr_lumpy_taken,
unsigned long nr_lumpy_dirty,
unsigned long nr_lumpy_failed,
- int isolate_mode),
+ isolate_mode_t isolate_mode),
TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode),
__field(unsigned long, nr_lumpy_taken)
__field(unsigned long, nr_lumpy_dirty)
__field(unsigned long, nr_lumpy_failed)
- __field(int, isolate_mode)
+ __field(isolate_mode_t, isolate_mode)
),
TP_fast_assign(
unsigned long nr_lumpy_taken,
unsigned long nr_lumpy_dirty,
unsigned long nr_lumpy_failed,
- int isolate_mode),
+ isolate_mode_t isolate_mode),
TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
unsigned long nr_lumpy_taken,
unsigned long nr_lumpy_dirty,
unsigned long nr_lumpy_failed,
- int isolate_mode),
+ isolate_mode_t isolate_mode),
TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
int root_mountflags = MS_RDONLY | MS_SILENT;
static char * __initdata root_device_name;
static char __initdata saved_root_name[64];
-static int __initdata root_wait;
+static int root_wait;
dev_t ROOT_DEV;
/**
* devt_from_partuuid - looks up the dev_t of a partition by its UUID
- * @uuid: 36 byte char array containing a hex ascii UUID
+ * @uuid: min 36 byte char array containing a hex ascii UUID
*
* The function will return the first partition which contains a matching
* UUID value in its partition_meta_info struct. This does not search
* by filesystem UUIDs.
*
+ * If @uuid is followed by a "/PARTNROFF=%d", then the number will be
+ * extracted and used as an offset from the partition identified by the UUID.
+ *
* Returns the matching dev_t on success or 0 on failure.
*/
static dev_t devt_from_partuuid(char *uuid_str)
dev_t res = 0;
struct device *dev = NULL;
u8 uuid[16];
+ struct gendisk *disk;
+ struct hd_struct *part;
+ int offset = 0;
+
+ if (strlen(uuid_str) < 36)
+ goto done;
+
+ /* Check for optional partition number offset attributes. */
+ if (uuid_str[36]) {
+ char c = 0;
+ /* Explicitly fail on poor PARTUUID syntax. */
+ if (sscanf(&uuid_str[36],
+ "/PARTNROFF=%d%c", &offset, &c) != 1) {
+ printk(KERN_ERR "VFS: PARTUUID= is invalid.\n"
+ "Expected PARTUUID=<valid-uuid-id>[/PARTNROFF=%%d]\n");
+ if (root_wait)
+ printk(KERN_ERR
+ "Disabling rootwait; root= is invalid.\n");
+ root_wait = 0;
+ goto done;
+ }
+ }
/* Pack the requested UUID in the expected format. */
part_pack_uuid(uuid_str, uuid);
goto done;
res = dev->devt;
- put_device(dev);
+ /* Attempt to find the partition by offset. */
+ if (!offset)
+ goto no_offset;
+
+ res = 0;
+ disk = part_to_disk(dev_to_part(dev));
+ part = disk_get_part(disk, dev_to_part(dev)->partno + offset);
+ if (part) {
+ res = part_devt(part);
+ put_device(part_to_dev(part));
+ }
+
+no_offset:
+ put_device(dev);
done:
return res;
}
* used when disk name of partitioned disk ends on a digit.
* 6) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the
* unique id of a partition if the partition table provides it.
+ * 7) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation to
+ * a partition with a known unique id.
*
* If name doesn't have fall into the categories above, we return (0,0).
* block_class is used to check if something is a disk name. If the disk
#ifdef CONFIG_BLOCK
if (strncmp(name, "PARTUUID=", 9) == 0) {
name += 9;
- if (strlen(name) != 36)
- goto fail;
res = devt_from_partuuid(name);
if (!res)
goto fail;
DEFINE_SPINLOCK(mq_lock);
+#define INIT_IPC_SHM_IDS(name) \
+ { .rw_mutex = __RWSEM_INITIALIZER(name.rw_mutex), }
+
/*
* The next 2 defines are here bc this is the only file
* compiled when either CONFIG_SYSVIPC and CONFIG_POSIX_MQUEUE
*/
struct ipc_namespace init_ipc_ns = {
.count = ATOMIC_INIT(1),
+ .ids = {
+ [IPC_SHM_IDS] = INIT_IPC_SHM_IDS(init_ipc_ns.ids[IPC_SHM_IDS]),
+ },
#ifdef CONFIG_POSIX_MQUEUE
.mq_queues_max = DFLT_QUEUESMAX,
.mq_msg_max = DFLT_MSGMAX,
ns->shm_ctlmax = SHMMAX;
ns->shm_ctlall = SHMALL;
ns->shm_ctlmni = SHMMNI;
- ns->shm_rmid_forced = 0;
+ ns->shm_rmid_forced = 1;
ns->shm_tot = 0;
- ipc_init_ids(&shm_ids(ns));
+
+ /*
+ * For init_ipc_ns shm_ids().rw_mutex is statically initialized
+ * as kernel threads should be able to use it in do_exit() before
+ * shm_init(), which is called on do_initcall()
+ */
+ if (ns == &init_ipc_ns)
+ __ipc_init_ids(&shm_ids(ns));
+ else
+ ipc_init_ids(&shm_ids(ns));
}
/*
}
__initcall(ipc_init);
-/**
- * ipc_init_ids - initialise IPC identifiers
- * @ids: Identifier set
- *
- * Set up the sequence range to use for the ipc identifier range (limited
- * below IPCMNI) then initialise the ids idr.
- */
-
-void ipc_init_ids(struct ipc_ids *ids)
+void __ipc_init_ids(struct ipc_ids *ids)
{
- init_rwsem(&ids->rw_mutex);
-
ids->in_use = 0;
ids->seq = 0;
{
int seq_limit = INT_MAX/SEQ_MULTIPLIER;
if (seq_limit > USHRT_MAX)
ids->seq_max = USHRT_MAX;
- else
- ids->seq_max = seq_limit;
+ else
+ ids->seq_max = seq_limit;
}
idr_init(&ids->ipcs_idr);
}
+/**
+ * ipc_init_ids - initialise IPC identifiers
+ * @ids: Identifier set
+ *
+ * Set up the sequence range to use for the ipc identifier range (limited
+ * below IPCMNI) then initialise the ids idr.
+ */
+
+void ipc_init_ids(struct ipc_ids *ids)
+{
+ init_rwsem(&ids->rw_mutex);
+ __ipc_init_ids(ids);
+}
+
#ifdef CONFIG_PROC_FS
static const struct file_operations sysvipc_proc_fops;
/**
struct ipc_ids;
void ipc_init_ids(struct ipc_ids *);
+void __ipc_init_ids(struct ipc_ids *ids);
#ifdef CONFIG_PROC_FS
void __init ipc_init_proc_interface(const char *path, const char *header,
int ids, int (*show)(struct seq_file *, void *));
avail = audit_expand(ab,
max_t(unsigned, AUDIT_BUFSIZ, 1+len-avail));
if (!avail)
- goto out;
+ goto out_va_end;
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2);
}
- va_end(args2);
if (len > 0)
skb_put(skb, len);
+out_va_end:
+ va_end(args2);
out:
return;
}
const char __user *user_buf, size_t count, loff_t *ppos)
{
char buf[32];
- int buf_size;
+ size_t buf_size;
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
cond_syscall(sys_io_cancel);
cond_syscall(sys_io_getevents);
cond_syscall(sys_syslog);
+cond_syscall(sys_process_vm_readv);
+cond_syscall(sys_process_vm_writev);
+cond_syscall(compat_sys_process_vm_readv);
+cond_syscall(compat_sys_process_vm_writev);
/* arch-specific weak syscall entries */
cond_syscall(sys_pciconfig_read);
.data = &sysctl_timer_migration,
.maxlen = sizeof(unsigned int),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .proc_handler = proc_dointvec_bool,
},
#endif
{
.data = &dmesg_restrict,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .proc_handler = proc_dointvec_bool,
},
{
.procname = "kptr_restrict",
.data = &softlockup_panic,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .proc_handler = proc_dointvec_bool,
},
{
.procname = "nmi_watchdog",
.data = &sysctl_hung_task_panic,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .proc_handler = proc_dointvec_bool,
},
{
.procname = "hung_task_check_count",
.data = &sysctl_max_map_count,
.maxlen = sizeof(sysctl_max_map_count),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
+ .proc_handler = proc_dointvec_unsigned,
},
#else
{
.data = &sysctl_nr_trim_pages,
.maxlen = sizeof(sysctl_nr_trim_pages),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
+ .proc_handler = proc_dointvec_unsigned,
},
#endif
{
.data = &block_dump,
.maxlen = sizeof(block_dump),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = &zero,
+ .proc_handler = proc_dointvec_unsigned,
},
{
.procname = "vfs_cache_pressure",
.data = &sysctl_vfs_cache_pressure,
.maxlen = sizeof(sysctl_vfs_cache_pressure),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = &zero,
+ .proc_handler = proc_dointvec_unsigned,
},
#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
{
.data = &sysctl_legacy_va_layout,
.maxlen = sizeof(sysctl_legacy_va_layout),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = &zero,
+ .proc_handler = proc_dointvec_unsigned,
},
#endif
#ifdef CONFIG_NUMA
.data = &zone_reclaim_mode,
.maxlen = sizeof(zone_reclaim_mode),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = &zero,
+ .proc_handler = proc_dointvec_unsigned,
},
{
.procname = "min_unmapped_ratio",
.data = &vdso_enabled,
.maxlen = sizeof(vdso_enabled),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = &zero,
+ .proc_handler = proc_dointvec_unsigned,
},
#endif
#ifdef CONFIG_HIGHMEM
.data = &vm_highmem_is_dirtyable,
.maxlen = sizeof(vm_highmem_is_dirtyable),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .proc_handler = proc_dointvec_bool,
},
#endif
{
.data = &sysctl_memory_failure_early_kill,
.maxlen = sizeof(sysctl_memory_failure_early_kill),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .proc_handler = proc_dointvec_bool,
},
{
.procname = "memory_failure_recovery",
.data = &sysctl_memory_failure_recovery,
.maxlen = sizeof(sysctl_memory_failure_recovery),
.mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &zero,
- .extra2 = &one,
+ .proc_handler = proc_dointvec_bool,
},
#endif
{ }
do_proc_dointvec_minmax_conv, ¶m);
}
+/**
+ * proc_dointvec_bool - read a vector of integers with 0/1 values
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ *
+ * This routine will ensure the values are either 0 or 1.
+ *
+ * Returns 0 on success.
+ */
+int proc_dointvec_bool(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct do_proc_dointvec_minmax_conv_param param = {
+ .min = &zero,
+ .max = &one,
+ };
+ return do_proc_dointvec(table, write, buffer, lenp, ppos,
+ do_proc_dointvec_minmax_conv, ¶m);
+}
+EXPORT_SYMBOL(proc_dointvec_bool);
+
+/**
+ * proc_dointvec_unsigned - read a vector of integers with positive values
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ *
+ * This routine will ensure the values are positive.
+ *
+ * Returns 0 on success.
+ */
+int proc_dointvec_unsigned(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct do_proc_dointvec_minmax_conv_param param = {
+ .min = &zero,
+ .max = (int *) table->extra2,
+ };
+ return do_proc_dointvec(table, write, buffer, lenp, ppos,
+ do_proc_dointvec_minmax_conv, ¶m);
+}
+EXPORT_SYMBOL(proc_dointvec_unsigned);
+
static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos,
/*
* Convert jiffies/jiffies_64 to clock_t and back.
*/
-clock_t jiffies_to_clock_t(long x)
+clock_t jiffies_to_clock_t(unsigned long x)
{
#if (TICK_NSEC % (NSEC_PER_SEC / USER_HZ)) == 0
# if HZ < USER_HZ
}
}
+/*
+ * fixup_assert_init is called when:
+ * - an untracked/uninit-ed object is found
+ */
+static int timer_fixup_assert_init(void *addr, enum debug_obj_state state)
+{
+ struct timer_list *timer = addr;
+
+ switch (state) {
+ case ODEBUG_STATE_NOTAVAILABLE:
+ if (timer->entry.prev == TIMER_ENTRY_STATIC) {
+ /*
+ * This is not really a fixup. The timer was
+ * statically initialized. We just make sure that it
+ * is tracked in the object tracker.
+ */
+ debug_object_init(timer, &timer_debug_descr);
+ return 0;
+ } else {
+ WARN_ON(1);
+ init_timer(timer);
+ return 1;
+ }
+ default:
+ return 0;
+ }
+}
+
static struct debug_obj_descr timer_debug_descr = {
- .name = "timer_list",
- .debug_hint = timer_debug_hint,
- .fixup_init = timer_fixup_init,
- .fixup_activate = timer_fixup_activate,
- .fixup_free = timer_fixup_free,
+ .name = "timer_list",
+ .debug_hint = timer_debug_hint,
+ .fixup_init = timer_fixup_init,
+ .fixup_activate = timer_fixup_activate,
+ .fixup_free = timer_fixup_free,
+ .fixup_assert_init = timer_fixup_assert_init,
};
static inline void debug_timer_init(struct timer_list *timer)
debug_object_free(timer, &timer_debug_descr);
}
+static inline void debug_timer_assert_init(struct timer_list *timer)
+{
+ debug_object_assert_init(timer, &timer_debug_descr);
+}
+
static void __init_timer(struct timer_list *timer,
const char *name,
struct lock_class_key *key);
static inline void debug_timer_init(struct timer_list *timer) { }
static inline void debug_timer_activate(struct timer_list *timer) { }
static inline void debug_timer_deactivate(struct timer_list *timer) { }
+static inline void debug_timer_assert_init(struct timer_list *timer) { }
#endif
static inline void debug_init(struct timer_list *timer)
trace_timer_cancel(timer);
}
+static inline void debug_assert_init(struct timer_list *timer)
+{
+ debug_timer_assert_init(timer);
+}
+
static void __init_timer(struct timer_list *timer,
const char *name,
struct lock_class_key *key)
unsigned long flags;
int ret = 0;
+ debug_assert_init(timer);
+
timer_stats_timer_clear_start_info(timer);
if (timer_pending(timer)) {
base = lock_timer_base(timer, &flags);
unsigned long flags;
int ret = -1;
+ debug_assert_init(timer);
+
base = lock_timer_base(timer, &flags);
if (base->running_timer == timer)
to properly maintain and use. This enables checks that help
you to keep things correct.
+config ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
+ bool
+
+config DEBUG_STRICT_USER_COPY_CHECKS
+ bool "Strict user copy size checks"
+ depends on ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
+ depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
+ help
+ Enabling this option turns a certain set of sanity checks for user
+ copy operations into compile time failures.
+
+ The copy_from_user() etc checks are there to help test if there
+ are sufficient security checks on the length argument of
+ the copy operation, by having gcc prove that the argument is
+ within bounds.
+
+ If unsure, say N.
+
source mm/Kconfig.debug
source kernel/trace/Kconfig
proportions.o prio_heap.o ratelimit.o show_mem.o \
is_single_threaded.o plist.o decompress.o find_next_bit.o
+obj-$(CONFIG_ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS) += usercopy.o
lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o
/*
+ * July 20, 2011 Bob Pearson <rpearson at systemfabricworks.com>
+ * added slice by 8 algorithm to the existing conventional and
+ * slice by 4 algorithms.
+ *
* Oct 15, 2000 Matt Domsch <Matt_Domsch@dell.com>
* Nicer crc32 functions/docs submitted by linux@horizon.com. Thanks!
* Code was from the public domain, copyright abandoned. Code was
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
-
#include <linux/crc32.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/atomic.h>
#include "crc32defs.h"
-#if CRC_LE_BITS == 8
-# define tole(x) __constant_cpu_to_le32(x)
+
+#if CRC_LE_BITS > 8
+# define tole(x) (__force u32) __constant_cpu_to_le32(x)
#else
# define tole(x) (x)
#endif
-#if CRC_BE_BITS == 8
-# define tobe(x) __constant_cpu_to_be32(x)
+#if CRC_BE_BITS > 8
+# define tobe(x) (__force u32) __constant_cpu_to_be32(x)
#else
# define tobe(x) (x)
#endif
MODULE_DESCRIPTION("Ethernet CRC32 calculations");
MODULE_LICENSE("GPL");
-#if CRC_LE_BITS == 8 || CRC_BE_BITS == 8
+#if CRC_LE_BITS > 8
+static inline u32 crc32_le_body(u32 crc, u8 const *buf, size_t len)
+{
+ const u8 *p8;
+ const u32 *p32;
+ int init_bytes, end_bytes;
+ size_t words;
+ int i;
+ u32 q;
+ u8 i0, i1, i2, i3;
+
+ crc = (__force u32) __cpu_to_le32(crc);
+
+#if CRC_LE_BITS == 64
+ p8 = buf;
+ p32 = (u32 *)(((uintptr_t)p8 + 7) & ~7);
+
+ init_bytes = (uintptr_t)p32 - (uintptr_t)p8;
+ if (init_bytes > len)
+ init_bytes = len;
+ words = (len - init_bytes) >> 3;
+ end_bytes = (len - init_bytes) & 7;
+#else
+ p8 = buf;
+ p32 = (u32 *)(((uintptr_t)p8 + 3) & ~3);
+
+ init_bytes = (uintptr_t)p32 - (uintptr_t)p8;
+ if (init_bytes > len)
+ init_bytes = len;
+ words = (len - init_bytes) >> 2;
+ end_bytes = (len - init_bytes) & 3;
+#endif
+
+ for (i = 0; i < init_bytes; i++) {
+#ifdef __LITTLE_ENDIAN
+ i0 = *p8++ ^ crc;
+ crc = t0_le[i0] ^ (crc >> 8);
+#else
+ i0 = *p8++ ^ (crc >> 24);
+ crc = t0_le[i0] ^ (crc << 8);
+#endif
+ }
+
+ for (i = 0; i < words; i++) {
+#ifdef __LITTLE_ENDIAN
+# if CRC_LE_BITS == 64
+ /* slice by 8 algorithm */
+ q = *p32++ ^ crc;
+ i3 = q;
+ i2 = q >> 8;
+ i1 = q >> 16;
+ i0 = q >> 24;
+ crc = t7_le[i3] ^ t6_le[i2] ^ t5_le[i1] ^ t4_le[i0];
+
+ q = *p32++;
+ i3 = q;
+ i2 = q >> 8;
+ i1 = q >> 16;
+ i0 = q >> 24;
+ crc ^= t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
+# else
+ /* slice by 4 algorithm */
+ q = *p32++ ^ crc;
+ i3 = q;
+ i2 = q >> 8;
+ i1 = q >> 16;
+ i0 = q >> 24;
+ crc = t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
+# endif
+#else
+# if CRC_LE_BITS == 64
+ q = *p32++ ^ crc;
+ i3 = q >> 24;
+ i2 = q >> 16;
+ i1 = q >> 8;
+ i0 = q;
+ crc = t7_le[i3] ^ t6_le[i2] ^ t5_le[i1] ^ t4_le[i0];
+
+ q = *p32++;
+ i3 = q >> 24;
+ i2 = q >> 16;
+ i1 = q >> 8;
+ i0 = q;
+ crc ^= t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
+# else
+ q = *p32++ ^ crc;
+ i3 = q >> 24;
+ i2 = q >> 16;
+ i1 = q >> 8;
+ i0 = q;
+ crc = t3_le[i3] ^ t2_le[i2] ^ t1_le[i1] ^ t0_le[i0];
+# endif
+#endif
+ }
+
+ p8 = (u8 *)p32;
+
+ for (i = 0; i < end_bytes; i++) {
+#ifdef __LITTLE_ENDIAN
+ i0 = *p8++ ^ crc;
+ crc = t0_le[i0] ^ (crc >> 8);
+#else
+ i0 = *p8++ ^ (crc >> 24);
+ crc = t0_le[i0] ^ (crc << 8);
+#endif
+ }
-static inline u32
-crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
+ return __le32_to_cpu((__force __le32)crc);
+}
+#endif
+
+#if CRC_BE_BITS > 8
+static inline u32 crc32_be_body(u32 crc, u8 const *buf, size_t len)
{
-# ifdef __LITTLE_ENDIAN
-# define DO_CRC(x) crc = tab[0][(crc ^ (x)) & 255] ^ (crc >> 8)
-# define DO_CRC4 crc = tab[3][(crc) & 255] ^ \
- tab[2][(crc >> 8) & 255] ^ \
- tab[1][(crc >> 16) & 255] ^ \
- tab[0][(crc >> 24) & 255]
-# else
-# define DO_CRC(x) crc = tab[0][((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
-# define DO_CRC4 crc = tab[0][(crc) & 255] ^ \
- tab[1][(crc >> 8) & 255] ^ \
- tab[2][(crc >> 16) & 255] ^ \
- tab[3][(crc >> 24) & 255]
-# endif
- const u32 *b;
- size_t rem_len;
-
- /* Align it */
- if (unlikely((long)buf & 3 && len)) {
- do {
- DO_CRC(*buf++);
- } while ((--len) && ((long)buf)&3);
+ const u8 *p8;
+ const u32 *p32;
+ int init_bytes, end_bytes;
+ size_t words;
+ int i;
+ u32 q;
+ u8 i0, i1, i2, i3;
+
+ crc = (__force u32) __cpu_to_be32(crc);
+
+#if CRC_LE_BITS == 64
+ p8 = buf;
+ p32 = (u32 *)(((uintptr_t)p8 + 7) & ~7);
+
+ init_bytes = (uintptr_t)p32 - (uintptr_t)p8;
+ if (init_bytes > len)
+ init_bytes = len;
+ words = (len - init_bytes) >> 3;
+ end_bytes = (len - init_bytes) & 7;
+#else
+ p8 = buf;
+ p32 = (u32 *)(((uintptr_t)p8 + 3) & ~3);
+
+ init_bytes = (uintptr_t)p32 - (uintptr_t)p8;
+ if (init_bytes > len)
+ init_bytes = len;
+ words = (len - init_bytes) >> 2;
+ end_bytes = (len - init_bytes) & 3;
+#endif
+
+ for (i = 0; i < init_bytes; i++) {
+#ifdef __LITTLE_ENDIAN
+ i0 = *p8++ ^ crc;
+ crc = t0_be[i0] ^ (crc >> 8);
+#else
+ i0 = *p8++ ^ (crc >> 24);
+ crc = t0_be[i0] ^ (crc << 8);
+#endif
}
- rem_len = len & 3;
- /* load data 32 bits wide, xor data 32 bits wide. */
- len = len >> 2;
- b = (const u32 *)buf;
- for (--b; len; --len) {
- crc ^= *++b; /* use pre increment for speed */
- DO_CRC4;
+
+ for (i = 0; i < words; i++) {
+#ifdef __LITTLE_ENDIAN
+# if CRC_LE_BITS == 64
+ /* slice by 8 algorithm */
+ q = *p32++ ^ crc;
+ i3 = q;
+ i2 = q >> 8;
+ i1 = q >> 16;
+ i0 = q >> 24;
+ crc = t7_be[i3] ^ t6_be[i2] ^ t5_be[i1] ^ t4_be[i0];
+
+ q = *p32++;
+ i3 = q;
+ i2 = q >> 8;
+ i1 = q >> 16;
+ i0 = q >> 24;
+ crc ^= t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
+# else
+ /* slice by 4 algorithm */
+ q = *p32++ ^ crc;
+ i3 = q;
+ i2 = q >> 8;
+ i1 = q >> 16;
+ i0 = q >> 24;
+ crc = t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
+# endif
+#else
+# if CRC_LE_BITS == 64
+ q = *p32++ ^ crc;
+ i3 = q >> 24;
+ i2 = q >> 16;
+ i1 = q >> 8;
+ i0 = q;
+ crc = t7_be[i3] ^ t6_be[i2] ^ t5_be[i1] ^ t4_be[i0];
+
+ q = *p32++;
+ i3 = q >> 24;
+ i2 = q >> 16;
+ i1 = q >> 8;
+ i0 = q;
+ crc ^= t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
+# else
+ q = *p32++ ^ crc;
+ i3 = q >> 24;
+ i2 = q >> 16;
+ i1 = q >> 8;
+ i0 = q;
+ crc = t3_be[i3] ^ t2_be[i2] ^ t1_be[i1] ^ t0_be[i0];
+# endif
+#endif
}
- len = rem_len;
- /* And the last few bytes */
- if (len) {
- u8 *p = (u8 *)(b + 1) - 1;
- do {
- DO_CRC(*++p); /* use pre increment for speed */
- } while (--len);
+
+ p8 = (u8 *)p32;
+
+ for (i = 0; i < end_bytes; i++) {
+#ifdef __LITTLE_ENDIAN
+ i0 = *p8++ ^ crc;
+ crc = t0_be[i0] ^ (crc >> 8);
+#else
+ i0 = *p8++ ^ (crc >> 24);
+ crc = t0_be[i0] ^ (crc << 8);
+#endif
}
- return crc;
-#undef DO_CRC
-#undef DO_CRC4
+
+ return __be32_to_cpu((__force __be32)crc);
}
#endif
+
/**
* crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32
* @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for
* @p: pointer to buffer over which CRC is run
* @len: length of buffer @p
*/
-u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len);
-
-#if CRC_LE_BITS == 1
-/*
- * In fact, the table-based code will work in this case, but it can be
- * simplified by inlining the table in ?: form.
- */
-
u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
{
+#if CRC_LE_BITS == 1
int i;
while (len--) {
crc ^= *p++;
for (i = 0; i < 8; i++)
crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
}
- return crc;
-}
-#else /* Table-based approach */
-
-u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
-{
-# if CRC_LE_BITS == 8
- const u32 (*tab)[] = crc32table_le;
-
- crc = __cpu_to_le32(crc);
- crc = crc32_body(crc, p, len, tab);
- return __le32_to_cpu(crc);
+# elif CRC_LE_BITS == 2
+ while (len--) {
+ crc ^= *p++;
+ crc = (crc >> 2) ^ t0_le[crc & 0x03];
+ crc = (crc >> 2) ^ t0_le[crc & 0x03];
+ crc = (crc >> 2) ^ t0_le[crc & 0x03];
+ crc = (crc >> 2) ^ t0_le[crc & 0x03];
+ }
# elif CRC_LE_BITS == 4
while (len--) {
crc ^= *p++;
- crc = (crc >> 4) ^ crc32table_le[crc & 15];
- crc = (crc >> 4) ^ crc32table_le[crc & 15];
+ crc = (crc >> 4) ^ t0_le[crc & 0x0f];
+ crc = (crc >> 4) ^ t0_le[crc & 0x0f];
}
- return crc;
-# elif CRC_LE_BITS == 2
+# elif CRC_LE_BITS == 8
while (len--) {
crc ^= *p++;
- crc = (crc >> 2) ^ crc32table_le[crc & 3];
- crc = (crc >> 2) ^ crc32table_le[crc & 3];
- crc = (crc >> 2) ^ crc32table_le[crc & 3];
- crc = (crc >> 2) ^ crc32table_le[crc & 3];
+ crc = (crc >> 8) ^ t0_le[crc & 0xff];
}
- return crc;
+# else
+ crc = crc32_le_body(crc, p, len);
# endif
+ return crc;
}
-#endif
+EXPORT_SYMBOL(crc32_le);
/**
* crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32
* @p: pointer to buffer over which CRC is run
* @len: length of buffer @p
*/
-u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len);
-
-#if CRC_BE_BITS == 1
-/*
- * In fact, the table-based code will work in this case, but it can be
- * simplified by inlining the table in ?: form.
- */
-
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
{
+#if CRC_BE_BITS == 1
int i;
while (len--) {
crc ^= *p++ << 24;
for (i = 0; i < 8; i++)
- crc =
- (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE :
- 0);
+ crc = (crc << 1) ^
+ ((crc & 0x80000000) ? CRCPOLY_BE : 0);
+ }
+# elif CRC_BE_BITS == 2
+ while (len--) {
+ crc ^= *p++ << 24;
+ crc = (crc << 2) ^ t0_be[crc >> 30];
+ crc = (crc << 2) ^ t0_be[crc >> 30];
+ crc = (crc << 2) ^ t0_be[crc >> 30];
+ crc = (crc << 2) ^ t0_be[crc >> 30];
}
- return crc;
-}
-
-#else /* Table-based approach */
-u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
-{
-# if CRC_BE_BITS == 8
- const u32 (*tab)[] = crc32table_be;
-
- crc = __cpu_to_be32(crc);
- crc = crc32_body(crc, p, len, tab);
- return __be32_to_cpu(crc);
# elif CRC_BE_BITS == 4
while (len--) {
crc ^= *p++ << 24;
- crc = (crc << 4) ^ crc32table_be[crc >> 28];
- crc = (crc << 4) ^ crc32table_be[crc >> 28];
+ crc = (crc << 4) ^ t0_be[crc >> 28];
+ crc = (crc << 4) ^ t0_be[crc >> 28];
}
- return crc;
-# elif CRC_BE_BITS == 2
+# elif CRC_BE_BITS == 8
while (len--) {
crc ^= *p++ << 24;
- crc = (crc << 2) ^ crc32table_be[crc >> 30];
- crc = (crc << 2) ^ crc32table_be[crc >> 30];
- crc = (crc << 2) ^ crc32table_be[crc >> 30];
- crc = (crc << 2) ^ crc32table_be[crc >> 30];
+ crc = (crc << 8) ^ t0_be[crc >> 24];
}
- return crc;
+# else
+ crc = crc32_be_body(crc, p, len);
# endif
+ return crc;
}
-#endif
-
-EXPORT_SYMBOL(crc32_le);
EXPORT_SYMBOL(crc32_be);
/*
#define CRCPOLY_LE 0xedb88320
#define CRCPOLY_BE 0x04c11db7
-/* How many bits at a time to use. Requires a table of 4<<CRC_xx_BITS bytes. */
+/* How many bits at a time to use. Valid values are 1, 2, 4, 8, 32 and 64. */
/* For less performance-sensitive, use 4 */
#ifndef CRC_LE_BITS
-# define CRC_LE_BITS 8
+# define CRC_LE_BITS 64
#endif
#ifndef CRC_BE_BITS
-# define CRC_BE_BITS 8
+# define CRC_BE_BITS 64
#endif
/*
* Little-endian CRC computation. Used with serial bit streams sent
* lsbit-first. Be sure to use cpu_to_le32() to append the computed CRC.
*/
-#if CRC_LE_BITS > 8 || CRC_LE_BITS < 1 || CRC_LE_BITS & CRC_LE_BITS-1
-# error CRC_LE_BITS must be a power of 2 between 1 and 8
+#if CRC_LE_BITS > 64 || CRC_LE_BITS < 1 || CRC_LE_BITS == 16 || \
+ CRC_LE_BITS & CRC_LE_BITS-1
+# error "CRC_LE_BITS must be one of {1, 2, 4, 8, 32, 64}"
#endif
/*
* Big-endian CRC computation. Used with serial bit streams sent
* msbit-first. Be sure to use cpu_to_be32() to append the computed CRC.
*/
-#if CRC_BE_BITS > 8 || CRC_BE_BITS < 1 || CRC_BE_BITS & CRC_BE_BITS-1
-# error CRC_BE_BITS must be a power of 2 between 1 and 8
+#if CRC_BE_BITS > 64 || CRC_BE_BITS < 1 || CRC_BE_BITS == 16 || \
+ CRC_BE_BITS & CRC_BE_BITS-1
+# error "CRC_BE_BITS must be one of {1, 2, 4, 8, 32, 64}"
#endif
raw_spin_unlock_irqrestore(&db->lock, flags);
}
+/**
+ * debug_object_assert_init - debug checks when object should be init-ed
+ * @addr: address of the object
+ * @descr: pointer to an object specific debug description structure
+ */
+void debug_object_assert_init(void *addr, struct debug_obj_descr *descr)
+{
+ struct debug_bucket *db;
+ struct debug_obj *obj;
+ unsigned long flags;
+
+ if (!debug_objects_enabled)
+ return;
+
+ db = get_bucket((unsigned long) addr);
+
+ raw_spin_lock_irqsave(&db->lock, flags);
+
+ obj = lookup_object(addr, db);
+ if (!obj) {
+ raw_spin_unlock_irqrestore(&db->lock, flags);
+ /*
+ * Maybe the object is static. Let the type specific
+ * code decide what to do.
+ */
+ debug_object_fixup(descr->fixup_assert_init, addr,
+ ODEBUG_STATE_NOTAVAILABLE);
+ return;
+ }
+
+ raw_spin_unlock_irqrestore(&db->lock, flags);
+}
+
/**
* debug_object_active_state - debug checks object usage state machine
* @addr: address of the object
#define ENTRIES_PER_LINE 4
+#if CRC_LE_BITS <= 8
#define LE_TABLE_SIZE (1 << CRC_LE_BITS)
+#else
+#define LE_TABLE_SIZE 256
+#endif
+
+#if CRC_BE_BITS <= 8
#define BE_TABLE_SIZE (1 << CRC_BE_BITS)
+#else
+#define BE_TABLE_SIZE 256
+#endif
-static uint32_t crc32table_le[4][LE_TABLE_SIZE];
-static uint32_t crc32table_be[4][BE_TABLE_SIZE];
+static uint32_t crc32table_le[8][256];
+static uint32_t crc32table_be[8][256];
/**
* crc32init_le() - allocate and initialize LE table data
crc32table_le[0][0] = 0;
- for (i = 1 << (CRC_LE_BITS - 1); i; i >>= 1) {
+ for (i = LE_TABLE_SIZE >> 1; i; i >>= 1) {
crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
for (j = 0; j < LE_TABLE_SIZE; j += 2 * i)
crc32table_le[0][i + j] = crc ^ crc32table_le[0][j];
}
for (i = 0; i < LE_TABLE_SIZE; i++) {
crc = crc32table_le[0][i];
- for (j = 1; j < 4; j++) {
+ for (j = 1; j < 8; j++) {
crc = crc32table_le[0][crc & 0xff] ^ (crc >> 8);
crc32table_le[j][i] = crc;
}
}
for (i = 0; i < BE_TABLE_SIZE; i++) {
crc = crc32table_be[0][i];
- for (j = 1; j < 4; j++) {
+ for (j = 1; j < 8; j++) {
crc = crc32table_be[0][(crc >> 24) & 0xff] ^ (crc << 8);
crc32table_be[j][i] = crc;
}
}
}
-static void output_table(uint32_t table[4][256], int len, char *trans)
+static void output_table(uint32_t table[8][256], int len, char trans)
{
int i, j;
- for (j = 0 ; j < 4; j++) {
- printf("{");
+ for (j = 0 ; j < 8; j++) {
+ printf("static const u32 t%d_%ce[] = {", j, trans);
for (i = 0; i < len - 1; i++) {
- if (i % ENTRIES_PER_LINE == 0)
+ if ((i % ENTRIES_PER_LINE) == 0)
printf("\n");
- printf("%s(0x%8.8xL), ", trans, table[j][i]);
+ printf("to%ce(0x%8.8xL),", trans, table[j][i]);
+ if ((i % ENTRIES_PER_LINE) != (ENTRIES_PER_LINE - 1))
+ printf(" ");
+ }
+ printf("to%ce(0x%8.8xL)};\n\n", trans, table[j][len - 1]);
+
+ if (trans == 'l') {
+ if ((j+1)*8 >= CRC_LE_BITS)
+ break;
+ } else {
+ if ((j+1)*8 >= CRC_BE_BITS)
+ break;
}
- printf("%s(0x%8.8xL)},\n", trans, table[j][len - 1]);
}
}
int main(int argc, char** argv)
{
- printf("/* this file is generated - do not edit */\n\n");
+ printf("/*\n");
+ printf(" * crc32table.h - CRC32 tables\n");
+ printf(" * this file is generated - do not edit\n");
+ printf(" * # gen_crc32table > crc32table.h\n");
+ printf(" * with\n");
+ printf(" * CRC_LE_BITS = %d\n", CRC_LE_BITS);
+ printf(" * CRC_BE_BITS = %d\n", CRC_BE_BITS);
+ printf(" */\n");
+ printf("\n");
if (CRC_LE_BITS > 1) {
crc32init_le();
- printf("static const u32 crc32table_le[4][256] = {");
- output_table(crc32table_le, LE_TABLE_SIZE, "tole");
- printf("};\n");
+ output_table(crc32table_le, LE_TABLE_SIZE, 'l');
}
if (CRC_BE_BITS > 1) {
crc32init_be();
- printf("static const u32 crc32table_be[4][256] = {");
- output_table(crc32table_be, BE_TABLE_SIZE, "tobe");
- printf("};\n");
+ output_table(crc32table_be, BE_TABLE_SIZE, 'b');
}
return 0;
{
unsigned int height, shift;
struct radix_tree_node *node;
- int saw_unset_tag = 0;
/* check the root's tag bit */
if (!root_tag_get(root, tag))
return 0;
offset = (index >> shift) & RADIX_TREE_MAP_MASK;
-
- /*
- * This is just a debug check. Later, we can bale as soon as
- * we see an unset tag.
- */
if (!tag_get(node, tag, offset))
- saw_unset_tag = 1;
+ return 0;
if (height == 1)
- return !!tag_get(node, tag, offset);
+ return 1;
node = rcu_dereference_raw(node->slots[offset]);
shift -= RADIX_TREE_MAP_SHIFT;
height--;
mmu-y := nommu.o
mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \
mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \
- vmalloc.o pagewalk.o pgtable-generic.o
+ vmalloc.o pagewalk.o pgtable-generic.o \
+ process_vm_access.o
obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
maccess.o page_alloc.o page-writeback.o \
unsigned long migrate_pfn; /* isolate_migratepages search base */
bool sync; /* Synchronous migration */
- /* Account for isolated anon and file pages */
- unsigned long nr_anon;
- unsigned long nr_file;
-
unsigned int order; /* order a direct compactor needs */
int migratetype; /* MOVABLE, RECLAIMABLE etc */
struct zone *zone;
static void acct_isolated(struct zone *zone, struct compact_control *cc)
{
struct page *page;
- unsigned int count[NR_LRU_LISTS] = { 0, };
+ unsigned int count[2] = { 0, };
- list_for_each_entry(page, &cc->migratepages, lru) {
- int lru = page_lru_base_type(page);
- count[lru]++;
- }
+ list_for_each_entry(page, &cc->migratepages, lru)
+ count[!!page_is_file_cache(page)]++;
- cc->nr_anon = count[LRU_ACTIVE_ANON] + count[LRU_INACTIVE_ANON];
- cc->nr_file = count[LRU_ACTIVE_FILE] + count[LRU_INACTIVE_FILE];
- __mod_zone_page_state(zone, NR_ISOLATED_ANON, cc->nr_anon);
- __mod_zone_page_state(zone, NR_ISOLATED_FILE, cc->nr_file);
+ __mod_zone_page_state(zone, NR_ISOLATED_ANON, count[0]);
+ __mod_zone_page_state(zone, NR_ISOLATED_FILE, count[1]);
}
/* Similar to reclaim, but different enough that they don't share logic */
unsigned long last_pageblock_nr = 0, pageblock_nr;
unsigned long nr_scanned = 0, nr_isolated = 0;
struct list_head *migratelist = &cc->migratepages;
+ isolate_mode_t mode = ISOLATE_ACTIVE|ISOLATE_INACTIVE;
/* Do not scan outside zone boundaries */
low_pfn = max(cc->migrate_pfn, zone->zone_start_pfn);
continue;
}
+ if (!cc->sync)
+ mode |= ISOLATE_CLEAN;
+
/* Try isolate the page */
- if (__isolate_lru_page(page, ISOLATE_BOTH, 0) != 0)
+ if (__isolate_lru_page(page, mode, 0) != 0)
continue;
VM_BUG_ON(PageTransCompound(page));
unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,
- int mode, struct zone *z,
+ isolate_mode_t mode,
+ struct zone *z,
struct mem_cgroup *mem_cont,
int active, int file)
{
if (!pn)
return 1;
- mem->info.nodeinfo[node] = pn;
for (zone = 0; zone < MAX_NR_ZONES; zone++) {
mz = &pn->zoneinfo[zone];
for_each_lru(l)
mz->on_tree = false;
mz->mem = mem;
}
+ mem->info.nodeinfo[node] = pn;
return 0;
}
err = sys_get_mempolicy(policy, nm, nr_bits+1, addr, flags);
if (!err && nmask) {
- err = copy_from_user(bm, nm, alloc_size);
+ unsigned long copy_size;
+ copy_size = min_t(unsigned long, sizeof(bm), alloc_size);
+ err = copy_from_user(bm, nm, copy_size);
/* ensure entire bitmap is zeroed */
err |= clear_user(nmask, ALIGN(maxnode-1, 8) / 8);
err |= compat_put_bitmap(nmask, bm, nr_bits);
return rc;
}
-/*
- * Obtain the lock on page, remove all ptes and migrate the page
- * to the newly allocated page in newpage.
- */
-static int unmap_and_move(new_page_t get_new_page, unsigned long private,
- struct page *page, int force, bool offlining, bool sync)
+static int __unmap_and_move(struct page *page, struct page *newpage,
+ int force, bool offlining, bool sync)
{
- int rc = 0;
- int *result = NULL;
- struct page *newpage = get_new_page(page, private, &result);
+ int rc = -EAGAIN;
int remap_swapcache = 1;
int charge = 0;
struct mem_cgroup *mem;
struct anon_vma *anon_vma = NULL;
- if (!newpage)
- return -ENOMEM;
-
- if (page_count(page) == 1) {
- /* page was freed from under us. So we are done. */
- goto move_newpage;
- }
- if (unlikely(PageTransHuge(page)))
- if (unlikely(split_huge_page(page)))
- goto move_newpage;
-
- /* prepare cgroup just returns 0 or -ENOMEM */
- rc = -EAGAIN;
-
if (!trylock_page(page)) {
if (!force || !sync)
- goto move_newpage;
+ goto out;
/*
* It's not safe for direct compaction to call lock_page.
* altogether.
*/
if (current->flags & PF_MEMALLOC)
- goto move_newpage;
+ goto out;
lock_page(page);
}
mem_cgroup_end_migration(mem, page, newpage, rc == 0);
unlock:
unlock_page(page);
+out:
+ return rc;
+}
-move_newpage:
+/*
+ * Obtain the lock on page, remove all ptes and migrate the page
+ * to the newly allocated page in newpage.
+ */
+static int unmap_and_move(new_page_t get_new_page, unsigned long private,
+ struct page *page, int force, bool offlining, bool sync)
+{
+ int rc = 0;
+ int *result = NULL;
+ struct page *newpage = get_new_page(page, private, &result);
+
+ if (!newpage)
+ return -ENOMEM;
+
+ if (page_count(page) == 1) {
+ /* page was freed from under us. So we are done. */
+ goto out;
+ }
+
+ if (unlikely(PageTransHuge(page)))
+ if (unlikely(split_huge_page(page)))
+ goto out;
+
+ rc = __unmap_and_move(page, newpage, force, offlining, sync);
+out:
if (rc != -EAGAIN) {
- /*
- * A page that has been migrated has all references
- * removed and will be freed. A page that has not been
- * migrated will have kepts its references and be
- * restored.
- */
- list_del(&page->lru);
+ /*
+ * A page that has been migrated has all references
+ * removed and will be freed. A page that has not been
+ * migrated will have kepts its references and be
+ * restored.
+ */
+ list_del(&page->lru);
dec_zone_page_state(page, NR_ISOLATED_ANON +
page_is_file_cache(page));
putback_lru_page(page);
}
-
/*
* Move the new page to the LRU. If migration was not successful
* then this will free the page.
*/
putback_lru_page(newpage);
-
if (result) {
if (rc)
*result = rc;
}
#endif
if (page) {
+#ifdef CONFIG_SWAP
+ if (radix_tree_exceptional_entry(page)) {
+ swp_entry_t swap = radix_to_swp_entry(page);
+ page = find_get_page(&swapper_space, swap.val);
+ }
+#endif
present = PageUptodate(page);
page_cache_release(page);
}
task_unlock(p);
/*
- * Kill all processes sharing p->mm in other thread groups, if any.
+ * Kill all user processes sharing p->mm in other thread groups, if any.
* They don't get access to memory reserves or a higher scheduler
* priority, though, to avoid depletion of all memory or task
* starvation. This prevents mm->mmap_sem livelock when an oom killed
* signal.
*/
for_each_process(q)
- if (q->mm == mm && !same_thread_group(q, p)) {
+ if (q->mm == mm && !same_thread_group(q, p) &&
+ !(q->flags & PF_KTHREAD)) {
task_lock(q); /* Protect ->comm from prctl() */
pr_err("Kill process %d (%s) sharing same memory\n",
task_pid_nr(q), q->comm);
static struct prop_descriptor vm_completions;
static struct prop_descriptor vm_dirties;
+/*
+ * Work out the current dirty-memory clamping and background writeout
+ * thresholds.
+ *
+ * The main aim here is to lower them aggressively if there is a lot of mapped
+ * memory around. To avoid stressing page reclaim with lots of unreclaimable
+ * pages. It is better to clamp down on writers than to start swapping, and
+ * performing lots of scanning.
+ *
+ * We only allow 1/2 of the currently-unmapped memory to be dirtied.
+ *
+ * We don't permit the clamping level to fall below 5% - that is getting rather
+ * excessive.
+ *
+ * We make sure that the background writeout level is below the adjusted
+ * clamping level.
+ */
+static unsigned long highmem_dirtyable_memory(unsigned long total)
+{
+#ifdef CONFIG_HIGHMEM
+ int node;
+ unsigned long x = 0;
+
+ for_each_node_state(node, N_HIGH_MEMORY) {
+ struct zone *z =
+ &NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
+
+ x += zone_page_state(z, NR_FREE_PAGES) +
+ zone_reclaimable_pages(z);
+ }
+ /*
+ * Make sure that the number of highmem pages is never larger
+ * than the number of the total dirtyable memory. This can only
+ * occur in very strange VM situations but we want to make sure
+ * that this does not occur.
+ */
+ return min(x, total);
+#else
+ return 0;
+#endif
+}
+
+/**
+ * determine_dirtyable_memory - amount of memory that may be used
+ *
+ * Returns the numebr of pages that can currently be freed and used
+ * by the kernel for direct mappings.
+ */
+static unsigned long determine_dirtyable_memory(void)
+{
+ unsigned long x;
+
+ x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages();
+
+ if (!vm_highmem_is_dirtyable)
+ x -= highmem_dirtyable_memory(x);
+
+ return x + 1; /* Ensure that we never return 0 */
+}
+
/*
* couple the period to the dirty_ratio:
*
return ret;
}
-
int dirty_bytes_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos)
}
EXPORT_SYMBOL(bdi_set_max_ratio);
-/*
- * Work out the current dirty-memory clamping and background writeout
- * thresholds.
- *
- * The main aim here is to lower them aggressively if there is a lot of mapped
- * memory around. To avoid stressing page reclaim with lots of unreclaimable
- * pages. It is better to clamp down on writers than to start swapping, and
- * performing lots of scanning.
- *
- * We only allow 1/2 of the currently-unmapped memory to be dirtied.
- *
- * We don't permit the clamping level to fall below 5% - that is getting rather
- * excessive.
- *
- * We make sure that the background writeout level is below the adjusted
- * clamping level.
- */
-
-static unsigned long highmem_dirtyable_memory(unsigned long total)
-{
-#ifdef CONFIG_HIGHMEM
- int node;
- unsigned long x = 0;
-
- for_each_node_state(node, N_HIGH_MEMORY) {
- struct zone *z =
- &NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
-
- x += zone_page_state(z, NR_FREE_PAGES) +
- zone_reclaimable_pages(z);
- }
- /*
- * Make sure that the number of highmem pages is never larger
- * than the number of the total dirtyable memory. This can only
- * occur in very strange VM situations but we want to make sure
- * that this does not occur.
- */
- return min(x, total);
-#else
- return 0;
-#endif
-}
-
-/**
- * determine_dirtyable_memory - amount of memory that may be used
- *
- * Returns the numebr of pages that can currently be freed and used
- * by the kernel for direct mappings.
- */
-unsigned long determine_dirtyable_memory(void)
-{
- unsigned long x;
-
- x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages();
-
- if (!vm_highmem_is_dirtyable)
- x -= highmem_dirtyable_memory(x);
-
- return x + 1; /* Ensure that we never return 0 */
-}
-
static unsigned long hard_dirty_limit(unsigned long thresh)
{
return max(thresh, global_dirty_limit);
--- /dev/null
+/*
+ * linux/mm/process_vm_access.c
+ *
+ * Copyright (C) 2010-2011 Christopher Yeoh <cyeoh@au1.ibm.com>, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/mm.h>
+#include <linux/uio.h>
+#include <linux/sched.h>
+#include <linux/highmem.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+#endif
+
+/**
+ * process_vm_rw_pages - read/write pages from task specified
+ * @task: task to read/write from
+ * @mm: mm for task
+ * @process_pages: struct pages area that can store at least
+ * nr_pages_to_copy struct page pointers
+ * @pa: address of page in task to start copying from/to
+ * @start_offset: offset in page to start copying from/to
+ * @len: number of bytes to copy
+ * @lvec: iovec array specifying where to copy to/from
+ * @lvec_cnt: number of elements in iovec array
+ * @lvec_current: index in iovec array we are up to
+ * @lvec_offset: offset in bytes from current iovec iov_base we are up to
+ * @vm_write: 0 means copy from, 1 means copy to
+ * @nr_pages_to_copy: number of pages to copy
+ * @bytes_copied: returns number of bytes successfully copied
+ * Returns 0 on success, error code otherwise
+ */
+static int process_vm_rw_pages(struct task_struct *task,
+ struct mm_struct *mm,
+ struct page **process_pages,
+ unsigned long pa,
+ unsigned long start_offset,
+ unsigned long len,
+ const struct iovec *lvec,
+ unsigned long lvec_cnt,
+ unsigned long *lvec_current,
+ size_t *lvec_offset,
+ int vm_write,
+ unsigned int nr_pages_to_copy,
+ ssize_t *bytes_copied)
+{
+ int pages_pinned;
+ void *target_kaddr;
+ int pgs_copied = 0;
+ int j;
+ int ret;
+ ssize_t bytes_to_copy;
+ ssize_t rc = 0;
+
+ *bytes_copied = 0;
+
+ /* Get the pages we're interested in */
+ down_read(&mm->mmap_sem);
+ pages_pinned = get_user_pages(task, mm, pa,
+ nr_pages_to_copy,
+ vm_write, 0, process_pages, NULL);
+ up_read(&mm->mmap_sem);
+
+ if (pages_pinned != nr_pages_to_copy) {
+ rc = -EFAULT;
+ goto end;
+ }
+
+ /* Do the copy for each page */
+ for (pgs_copied = 0;
+ (pgs_copied < nr_pages_to_copy) && (*lvec_current < lvec_cnt);
+ pgs_copied++) {
+ /* Make sure we have a non zero length iovec */
+ while (*lvec_current < lvec_cnt
+ && lvec[*lvec_current].iov_len == 0)
+ (*lvec_current)++;
+ if (*lvec_current == lvec_cnt)
+ break;
+
+ /*
+ * Will copy smallest of:
+ * - bytes remaining in page
+ * - bytes remaining in destination iovec
+ */
+ bytes_to_copy = min_t(ssize_t, PAGE_SIZE - start_offset,
+ len - *bytes_copied);
+ bytes_to_copy = min_t(ssize_t, bytes_to_copy,
+ lvec[*lvec_current].iov_len
+ - *lvec_offset);
+
+ target_kaddr = kmap(process_pages[pgs_copied]) + start_offset;
+
+ if (vm_write)
+ ret = copy_from_user(target_kaddr,
+ lvec[*lvec_current].iov_base
+ + *lvec_offset,
+ bytes_to_copy);
+ else
+ ret = copy_to_user(lvec[*lvec_current].iov_base
+ + *lvec_offset,
+ target_kaddr, bytes_to_copy);
+ kunmap(process_pages[pgs_copied]);
+ if (ret) {
+ *bytes_copied += bytes_to_copy - ret;
+ pgs_copied++;
+ rc = -EFAULT;
+ goto end;
+ }
+ *bytes_copied += bytes_to_copy;
+ *lvec_offset += bytes_to_copy;
+ if (*lvec_offset == lvec[*lvec_current].iov_len) {
+ /*
+ * Need to copy remaining part of page into the
+ * next iovec if there are any bytes left in page
+ */
+ (*lvec_current)++;
+ *lvec_offset = 0;
+ start_offset = (start_offset + bytes_to_copy)
+ % PAGE_SIZE;
+ if (start_offset)
+ pgs_copied--;
+ } else {
+ start_offset = 0;
+ }
+ }
+
+end:
+ if (vm_write) {
+ for (j = 0; j < pages_pinned; j++) {
+ if (j < pgs_copied)
+ set_page_dirty_lock(process_pages[j]);
+ put_page(process_pages[j]);
+ }
+ } else {
+ for (j = 0; j < pages_pinned; j++)
+ put_page(process_pages[j]);
+ }
+
+ return rc;
+}
+
+/* Maximum number of pages kmalloc'd to hold struct page's during copy */
+#define PVM_MAX_KMALLOC_PAGES (PAGE_SIZE * 2)
+
+/**
+ * process_vm_rw_single_vec - read/write pages from task specified
+ * @addr: start memory address of target process
+ * @len: size of area to copy to/from
+ * @lvec: iovec array specifying where to copy to/from locally
+ * @lvec_cnt: number of elements in iovec array
+ * @lvec_current: index in iovec array we are up to
+ * @lvec_offset: offset in bytes from current iovec iov_base we are up to
+ * @process_pages: struct pages area that can store at least
+ * nr_pages_to_copy struct page pointers
+ * @mm: mm for task
+ * @task: task to read/write from
+ * @vm_write: 0 means copy from, 1 means copy to
+ * @bytes_copied: returns number of bytes successfully copied
+ * Returns 0 on success or on failure error code
+ */
+static int process_vm_rw_single_vec(unsigned long addr,
+ unsigned long len,
+ const struct iovec *lvec,
+ unsigned long lvec_cnt,
+ unsigned long *lvec_current,
+ size_t *lvec_offset,
+ struct page **process_pages,
+ struct mm_struct *mm,
+ struct task_struct *task,
+ int vm_write,
+ ssize_t *bytes_copied)
+{
+ unsigned long pa = addr & PAGE_MASK;
+ unsigned long start_offset = addr - pa;
+ unsigned long nr_pages;
+ ssize_t bytes_copied_loop;
+ ssize_t rc = 0;
+ unsigned long nr_pages_copied = 0;
+ unsigned long nr_pages_to_copy;
+ unsigned long max_pages_per_loop = PVM_MAX_KMALLOC_PAGES
+ / sizeof(struct pages *);
+
+ *bytes_copied = 0;
+
+ /* Work out address and page range required */
+ if (len == 0)
+ return 0;
+ nr_pages = (addr + len - 1) / PAGE_SIZE - addr / PAGE_SIZE + 1;
+
+ while ((nr_pages_copied < nr_pages) && (*lvec_current < lvec_cnt)) {
+ nr_pages_to_copy = min(nr_pages - nr_pages_copied,
+ max_pages_per_loop);
+
+ rc = process_vm_rw_pages(task, mm, process_pages, pa,
+ start_offset, len,
+ lvec, lvec_cnt,
+ lvec_current, lvec_offset,
+ vm_write, nr_pages_to_copy,
+ &bytes_copied_loop);
+ start_offset = 0;
+ *bytes_copied += bytes_copied_loop;
+
+ if (rc < 0) {
+ return rc;
+ } else {
+ len -= bytes_copied_loop;
+ nr_pages_copied += nr_pages_to_copy;
+ pa += nr_pages_to_copy * PAGE_SIZE;
+ }
+ }
+
+ return rc;
+}
+
+/**
+ * process_vm_rw_core - core of reading/writing pages from task specified
+ * @pid: PID of process to read/write from/to
+ * @lvec: iovec array specifying where to copy to/from locally
+ * @liovcnt: size of lvec array
+ * @rvec: iovec array specifying where to copy to/from in the other process
+ * @riovcnt: size of rvec array
+ * @flags: currently unused
+ * @vm_write: 0 if reading from other process, 1 if writing to other process
+ * Returns the number of bytes read/written or error code. May
+ * return less bytes than expected if an error occurs during the copying
+ * process.
+ */
+static ssize_t process_vm_rw_core(pid_t pid, const struct iovec *lvec,
+ unsigned long liovcnt,
+ const struct iovec *rvec,
+ unsigned long riovcnt,
+ unsigned long flags, int vm_write)
+{
+ struct task_struct *task;
+ struct page **process_pages = NULL;
+ struct mm_struct *mm;
+ unsigned long i;
+ ssize_t rc = 0;
+ ssize_t bytes_copied_loop;
+ ssize_t bytes_copied = 0;
+ unsigned long nr_pages = 0;
+ unsigned long nr_pages_iov;
+ unsigned long iov_l_curr_idx = 0;
+ size_t iov_l_curr_offset = 0;
+ ssize_t iov_len;
+
+ /*
+ * Work out how many pages of struct pages we're going to need
+ * when eventually calling get_user_pages
+ */
+ for (i = 0; i < riovcnt; i++) {
+ iov_len = rvec[i].iov_len;
+ if (iov_len > 0) {
+ nr_pages_iov = ((unsigned long)rvec[i].iov_base
+ + iov_len)
+ / PAGE_SIZE - (unsigned long)rvec[i].iov_base
+ / PAGE_SIZE + 1;
+ nr_pages = max(nr_pages, nr_pages_iov);
+ }
+ }
+
+ if (nr_pages == 0)
+ return 0;
+
+ /* For reliability don't try to kmalloc more than 2 pages worth */
+ process_pages = kmalloc(min_t(size_t, PVM_MAX_KMALLOC_PAGES,
+ sizeof(struct pages *)*nr_pages),
+ GFP_KERNEL);
+
+ if (!process_pages)
+ return -ENOMEM;
+
+ /* Get process information */
+ rcu_read_lock();
+ task = find_task_by_vpid(pid);
+ if (task)
+ get_task_struct(task);
+ rcu_read_unlock();
+ if (!task) {
+ rc = -ESRCH;
+ goto free_proc_pages;
+ }
+
+ task_lock(task);
+ if (__ptrace_may_access(task, PTRACE_MODE_ATTACH)) {
+ task_unlock(task);
+ rc = -EPERM;
+ goto put_task_struct;
+ }
+ mm = task->mm;
+
+ if (!mm || (task->flags & PF_KTHREAD)) {
+ task_unlock(task);
+ rc = -EINVAL;
+ goto put_task_struct;
+ }
+
+ atomic_inc(&mm->mm_users);
+ task_unlock(task);
+
+ for (i = 0; i < riovcnt && iov_l_curr_idx < liovcnt; i++) {
+ rc = process_vm_rw_single_vec(
+ (unsigned long)rvec[i].iov_base, rvec[i].iov_len,
+ lvec, liovcnt, &iov_l_curr_idx, &iov_l_curr_offset,
+ process_pages, mm, task, vm_write, &bytes_copied_loop);
+ bytes_copied += bytes_copied_loop;
+ if (rc != 0) {
+ /* If we have managed to copy any data at all then
+ we return the number of bytes copied. Otherwise
+ we return the error code */
+ if (bytes_copied)
+ rc = bytes_copied;
+ goto put_mm;
+ }
+ }
+
+ rc = bytes_copied;
+put_mm:
+ mmput(mm);
+
+put_task_struct:
+ put_task_struct(task);
+
+free_proc_pages:
+ kfree(process_pages);
+ return rc;
+}
+
+/**
+ * process_vm_rw - check iovecs before calling core routine
+ * @pid: PID of process to read/write from/to
+ * @lvec: iovec array specifying where to copy to/from locally
+ * @liovcnt: size of lvec array
+ * @rvec: iovec array specifying where to copy to/from in the other process
+ * @riovcnt: size of rvec array
+ * @flags: currently unused
+ * @vm_write: 0 if reading from other process, 1 if writing to other process
+ * Returns the number of bytes read/written or error code. May
+ * return less bytes than expected if an error occurs during the copying
+ * process.
+ */
+static ssize_t process_vm_rw(pid_t pid,
+ const struct iovec __user *lvec,
+ unsigned long liovcnt,
+ const struct iovec __user *rvec,
+ unsigned long riovcnt,
+ unsigned long flags, int vm_write)
+{
+ struct iovec iovstack_l[UIO_FASTIOV];
+ struct iovec iovstack_r[UIO_FASTIOV];
+ struct iovec *iov_l = iovstack_l;
+ struct iovec *iov_r = iovstack_r;
+ ssize_t rc;
+
+ if (flags != 0)
+ return -EINVAL;
+
+ /* Check iovecs */
+ if (vm_write)
+ rc = rw_copy_check_uvector(WRITE, lvec, liovcnt, UIO_FASTIOV,
+ iovstack_l, &iov_l, 1);
+ else
+ rc = rw_copy_check_uvector(READ, lvec, liovcnt, UIO_FASTIOV,
+ iovstack_l, &iov_l, 1);
+ if (rc <= 0)
+ goto free_iovecs;
+
+ rc = rw_copy_check_uvector(READ, rvec, riovcnt, UIO_FASTIOV,
+ iovstack_r, &iov_r, 0);
+ if (rc <= 0)
+ goto free_iovecs;
+
+ rc = process_vm_rw_core(pid, iov_l, liovcnt, iov_r, riovcnt, flags,
+ vm_write);
+
+free_iovecs:
+ if (iov_r != iovstack_r)
+ kfree(iov_r);
+ if (iov_l != iovstack_l)
+ kfree(iov_l);
+
+ return rc;
+}
+
+SYSCALL_DEFINE6(process_vm_readv, pid_t, pid, const struct iovec __user *, lvec,
+ unsigned long, liovcnt, const struct iovec __user *, rvec,
+ unsigned long, riovcnt, unsigned long, flags)
+{
+ return process_vm_rw(pid, lvec, liovcnt, rvec, riovcnt, flags, 0);
+}
+
+SYSCALL_DEFINE6(process_vm_writev, pid_t, pid,
+ const struct iovec __user *, lvec,
+ unsigned long, liovcnt, const struct iovec __user *, rvec,
+ unsigned long, riovcnt, unsigned long, flags)
+{
+ return process_vm_rw(pid, lvec, liovcnt, rvec, riovcnt, flags, 1);
+}
+
+#ifdef CONFIG_COMPAT
+
+asmlinkage ssize_t
+compat_process_vm_rw(compat_pid_t pid,
+ const struct compat_iovec __user *lvec,
+ unsigned long liovcnt,
+ const struct compat_iovec __user *rvec,
+ unsigned long riovcnt,
+ unsigned long flags, int vm_write)
+{
+ struct iovec iovstack_l[UIO_FASTIOV];
+ struct iovec iovstack_r[UIO_FASTIOV];
+ struct iovec *iov_l = iovstack_l;
+ struct iovec *iov_r = iovstack_r;
+ ssize_t rc = -EFAULT;
+
+ if (flags != 0)
+ return -EINVAL;
+
+ if (!access_ok(VERIFY_READ, lvec, liovcnt * sizeof(*lvec)))
+ goto out;
+
+ if (!access_ok(VERIFY_READ, rvec, riovcnt * sizeof(*rvec)))
+ goto out;
+
+ if (vm_write)
+ rc = compat_rw_copy_check_uvector(WRITE, lvec, liovcnt,
+ UIO_FASTIOV, iovstack_l,
+ &iov_l, 1);
+ else
+ rc = compat_rw_copy_check_uvector(READ, lvec, liovcnt,
+ UIO_FASTIOV, iovstack_l,
+ &iov_l, 1);
+ if (rc <= 0)
+ goto free_iovecs;
+ rc = compat_rw_copy_check_uvector(READ, rvec, riovcnt,
+ UIO_FASTIOV, iovstack_r,
+ &iov_r, 0);
+ if (rc <= 0)
+ goto free_iovecs;
+
+ rc = process_vm_rw_core(pid, iov_l, liovcnt, iov_r, riovcnt, flags,
+ vm_write);
+
+free_iovecs:
+ if (iov_r != iovstack_r)
+ kfree(iov_r);
+ if (iov_l != iovstack_l)
+ kfree(iov_l);
+
+out:
+ return rc;
+}
+
+asmlinkage ssize_t
+compat_sys_process_vm_readv(compat_pid_t pid,
+ const struct compat_iovec __user *lvec,
+ unsigned long liovcnt,
+ const struct compat_iovec __user *rvec,
+ unsigned long riovcnt,
+ unsigned long flags)
+{
+ return compat_process_vm_rw(pid, lvec, liovcnt, rvec,
+ riovcnt, flags, 0);
+}
+
+asmlinkage ssize_t
+compat_sys_process_vm_writev(compat_pid_t pid,
+ const struct compat_iovec __user *lvec,
+ unsigned long liovcnt,
+ const struct compat_iovec __user *rvec,
+ unsigned long riovcnt,
+ unsigned long flags)
+{
+ return compat_process_vm_rw(pid, lvec, liovcnt, rvec,
+ riovcnt, flags, 1);
+}
+
+#endif
*
* returns 0 on success, -ve errno on failure.
*/
-int __isolate_lru_page(struct page *page, int mode, int file)
+int __isolate_lru_page(struct page *page, isolate_mode_t mode, int file)
{
+ bool all_lru_mode;
int ret = -EINVAL;
/* Only take pages on the LRU. */
if (!PageLRU(page))
return ret;
+ all_lru_mode = (mode & (ISOLATE_ACTIVE|ISOLATE_INACTIVE)) ==
+ (ISOLATE_ACTIVE|ISOLATE_INACTIVE);
+
/*
* When checking the active state, we need to be sure we are
* dealing with comparible boolean values. Take the logical not
* of each.
*/
- if (mode != ISOLATE_BOTH && (!PageActive(page) != !mode))
+ if (!all_lru_mode && !PageActive(page) != !(mode & ISOLATE_ACTIVE))
return ret;
- if (mode != ISOLATE_BOTH && page_is_file_cache(page) != file)
+ if (!all_lru_mode && !!page_is_file_cache(page) != file)
return ret;
/*
ret = -EBUSY;
+ if ((mode & ISOLATE_CLEAN) && (PageDirty(page) || PageWriteback(page)))
+ return ret;
+
+ if ((mode & ISOLATE_UNMAPPED) && page_mapped(page))
+ return ret;
+
if (likely(get_page_unless_zero(page))) {
/*
* Be careful not to clear PageLRU until after we're
*/
static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
struct list_head *src, struct list_head *dst,
- unsigned long *scanned, int order, int mode, int file)
+ unsigned long *scanned, int order, isolate_mode_t mode,
+ int file)
{
unsigned long nr_taken = 0;
unsigned long nr_lumpy_taken = 0;
static unsigned long isolate_pages_global(unsigned long nr,
struct list_head *dst,
unsigned long *scanned, int order,
- int mode, struct zone *z,
- int active, int file)
+ isolate_mode_t mode,
+ struct zone *z, int active, int file)
{
int lru = LRU_BASE;
if (active)
unsigned long nr_taken;
unsigned long nr_anon;
unsigned long nr_file;
+ isolate_mode_t reclaim_mode = ISOLATE_INACTIVE;
while (unlikely(too_many_isolated(zone, file, sc))) {
congestion_wait(BLK_RW_ASYNC, HZ/10);
}
set_reclaim_mode(priority, sc, false);
+ if (sc->reclaim_mode & RECLAIM_MODE_LUMPYRECLAIM)
+ reclaim_mode |= ISOLATE_ACTIVE;
+
lru_add_drain();
+
+ if (!sc->may_unmap)
+ reclaim_mode |= ISOLATE_UNMAPPED;
+ if (!sc->may_writepage)
+ reclaim_mode |= ISOLATE_CLEAN;
+
spin_lock_irq(&zone->lru_lock);
if (scanning_global_lru(sc)) {
- nr_taken = isolate_pages_global(nr_to_scan,
- &page_list, &nr_scanned, sc->order,
- sc->reclaim_mode & RECLAIM_MODE_LUMPYRECLAIM ?
- ISOLATE_BOTH : ISOLATE_INACTIVE,
- zone, 0, file);
+ nr_taken = isolate_pages_global(nr_to_scan, &page_list,
+ &nr_scanned, sc->order, reclaim_mode, zone, 0, file);
zone->pages_scanned += nr_scanned;
if (current_is_kswapd())
__count_zone_vm_events(PGSCAN_KSWAPD, zone,
__count_zone_vm_events(PGSCAN_DIRECT, zone,
nr_scanned);
} else {
- nr_taken = mem_cgroup_isolate_pages(nr_to_scan,
- &page_list, &nr_scanned, sc->order,
- sc->reclaim_mode & RECLAIM_MODE_LUMPYRECLAIM ?
- ISOLATE_BOTH : ISOLATE_INACTIVE,
- zone, sc->mem_cgroup,
- 0, file);
+ nr_taken = mem_cgroup_isolate_pages(nr_to_scan, &page_list,
+ &nr_scanned, sc->order, reclaim_mode, zone,
+ sc->mem_cgroup, 0, file);
/*
* mem_cgroup_isolate_pages() keeps track of
* scanned pages on its own.
struct page *page;
struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
unsigned long nr_rotated = 0;
+ isolate_mode_t reclaim_mode = ISOLATE_ACTIVE;
lru_add_drain();
+
+ if (!sc->may_unmap)
+ reclaim_mode |= ISOLATE_UNMAPPED;
+ if (!sc->may_writepage)
+ reclaim_mode |= ISOLATE_CLEAN;
+
spin_lock_irq(&zone->lru_lock);
if (scanning_global_lru(sc)) {
nr_taken = isolate_pages_global(nr_pages, &l_hold,
&pgscanned, sc->order,
- ISOLATE_ACTIVE, zone,
+ reclaim_mode, zone,
1, file);
zone->pages_scanned += pgscanned;
} else {
nr_taken = mem_cgroup_isolate_pages(nr_pages, &l_hold,
&pgscanned, sc->order,
- ISOLATE_ACTIVE, zone,
+ reclaim_mode, zone,
sc->mem_cgroup, 1, file);
/*
* mem_cgroup_isolate_pages() keeps track of
enum lru_list l;
unsigned long nr_reclaimed, nr_scanned;
unsigned long nr_to_reclaim = sc->nr_to_reclaim;
+ struct blk_plug plug;
restart:
nr_reclaimed = 0;
nr_scanned = sc->nr_scanned;
get_scan_count(zone, sc, nr, priority);
+ blk_start_plug(&plug);
while (nr[LRU_INACTIVE_ANON] || nr[LRU_ACTIVE_FILE] ||
nr[LRU_INACTIVE_FILE]) {
for_each_evictable_lru(l) {
if (nr_reclaimed >= nr_to_reclaim && priority < DEF_PRIORITY)
break;
}
+ blk_finish_plug(&plug);
sc->nr_reclaimed += nr_reclaimed;
/*
ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc,
ARRAY_SIZE(iovstack),
- iovstack, &iov);
+ iovstack, &iov, 1);
if (ret < 0)
return ret;
if (ret == 0)
goto no_payload;
ret = rw_copy_check_uvector(WRITE, _payload_iov, ioc,
- ARRAY_SIZE(iovstack), iovstack, &iov);
+ ARRAY_SIZE(iovstack), iovstack, &iov, 1);
if (ret < 0)
return ret;
if (ret == 0)
return length;
}
-static inline int hexcode_to_int(int code) {
- if (code == '\0' || !isxdigit(code))
- return -1;
- if (isdigit(code))
- return code - '0';
- return tolower(code) - 'a' + 10;
-}
-
static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
{
char *scon = NULL, *tcon = NULL;
if (c1 == '+')
c1 = ' ';
else if (c1 == '%') {
- if ((c1 = hexcode_to_int(*r++)) < 0)
+ c1 = hex_to_bin(*r++);
+ if (c1 < 0)
goto out;
- if ((c2 = hexcode_to_int(*r++)) < 0)
+ c2 = hex_to_bin(*r++);
+ if (c2 < 0)
goto out;
c1 = (c1 << 4) | c2;
}
projects / karo-tx-linux.git / commitdiff