On Tue, Sep 12, 2006 at 08:56:33AM +0200, Stefan Seyfried wrote:
> Hi,
>
> i finally tested it and it seems to work.
no, it didn't. But i fixed it. The placement of platform_finish() is
non-intuitive :-)
Also, moved to one ioctl with a parameter. If the style / ioctl design is
ok, could we push this ASAP? It is pretty important to me to be able to
test this further :-)
I'll also clean up the userspace part (add a configuration variable so once
can decide between "platform", "shutdown", maybe even "reboot", but that can
still be done once the kernel part is pushed.
This is for the kernel:
Add an ioctl to user.c so that uswsusp can suspend correctly using the
pm_ops methods.
From: Stefan Seyfried <[EMAIL PROTECTED]>
diff --exclude='.*' --exclude='*o' -ruNp /usr/src/linux/kernel/power/power.h
linux-2.6.18-rc6-2/kernel/power/power.h
--- /usr/src/linux/kernel/power/power.h 2006-09-08 19:02:33.000000000 +0200
+++ linux-2.6.18-rc6-2/kernel/power/power.h 2006-09-12 17:45:33.000000000
+0200
@@ -78,7 +78,12 @@ int snapshot_image_loaded(struct snapsho
#define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9)
#define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned
int)
#define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11)
-#define SNAPSHOT_IOC_MAXNR 11
+#define SNAPSHOT_PMOPS _IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned
int)
+#define SNAPSHOT_IOC_MAXNR 12
+
+#define PMOPS_PREPARE 1
+#define PMOPS_ENTER 2
+#define PMOPS_FINISH 3
/**
* The bitmap is used for tracing allocated swap pages
diff --exclude='.*' --exclude='*o' -ruNp /usr/src/linux/kernel/power/user.c
linux-2.6.18-rc6-2/kernel/power/user.c
--- /usr/src/linux/kernel/power/user.c 2006-06-18 03:49:35.000000000 +0200
+++ linux-2.6.18-rc6-2/kernel/power/user.c 2006-09-12 18:45:34.000000000
+0200
@@ -11,6 +11,7 @@
#include <linux/suspend.h>
#include <linux/syscalls.h>
+#include <linux/reboot.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/miscdevice.h>
@@ -302,6 +303,33 @@ OutS3:
up(&pm_sem);
break;
+ case SNAPSHOT_PMOPS:
+ switch (arg) {
+
+ case PMOPS_PREPARE:
+ if (pm_ops->prepare) {
+ error = pm_ops->prepare(PM_SUSPEND_DISK);
+ }
+ break;
+
+ case PMOPS_ENTER:
+ kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
+ error = pm_ops->enter(PM_SUSPEND_DISK);
+ break;
+
+ case PMOPS_FINISH:
+ if (pm_ops && pm_ops->finish) {
+ pm_ops->finish(PM_SUSPEND_DISK);
+ }
+ break;
+
+ default:
+ printk(KERN_ERR "SNAPSHOT_PMOPS: invalid argument
%ld\n", arg);
+ error = -EINVAL;
+
+ }
+ break;
+
default:
error = -ENOTTY;
-------------------------------------
and this is for userspace:
Index: suspend.c
===================================================================
RCS file: /cvsroot/suspend/suspend/suspend.c,v
retrieving revision 1.48
diff -u -p -r1.48 suspend.c
--- suspend.c 23 Jul 2006 11:32:52 -0000 1.48
+++ suspend.c 12 Sep 2006 16:56:48 -0000
@@ -636,9 +636,10 @@ static int reset_signature(int fd)
}
#endif
-static void suspend_shutdown(void)
+static void suspend_shutdown(int dev)
{
- power_off();
+ // power_off();
+ ioctl(dev, SNAPSHOT_PMOPS, PMOPS_ENTER);
/* Signature is on disk, it is very dangerous to continue now.
* We'd do resume with stale caches on next boot. */
printf("Powerdown failed. That's impossible.\n");
@@ -677,6 +678,8 @@ int suspend_system(int snapshot_fd, int
if (error)
goto Unfreeze;
+ ioctl(snapshot_fd, SNAPSHOT_PMOPS, PMOPS_PREPARE);
+
printf("suspend: Snapshotting system\n");
attempts = 2;
do {
@@ -687,6 +690,7 @@ int suspend_system(int snapshot_fd, int
if (!atomic_snapshot(snapshot_fd, &in_suspend)) {
if (!in_suspend) {
free_snapshot(snapshot_fd);
+ platform_finish(snapshot_fd);
break;
}
error = write_image(snapshot_fd, resume_fd, vt_no);
@@ -694,14 +698,14 @@ int suspend_system(int snapshot_fd, int
splash.progress(100);
#ifdef CONFIG_BOTH
if (!s2ram) {
- suspend_shutdown();
+ suspend_shutdown(snapshot_fd);
} else {
/* If we die (and allow system to
continue) between
* now and reset_signature(), very bad
things will
* happen. */
error = suspend_to_ram(snapshot_fd);
if (error)
- suspend_shutdown();
+ suspend_shutdown(snapshot_fd);
reset_signature(resume_fd);
free_swap_pages(snapshot_fd);
free_snapshot(snapshot_fd);
@@ -709,7 +713,7 @@ int suspend_system(int snapshot_fd, int
goto Unfreeze;
}
#else
- suspend_shutdown();
+ suspend_shutdown(snapshot_fd);
#endif
} else {
free_swap_pages(snapshot_fd);
Index: swsusp.h
===================================================================
RCS file: /cvsroot/suspend/suspend/swsusp.h,v
retrieving revision 1.25
diff -u -p -r1.25 swsusp.h
--- swsusp.h 3 Sep 2006 22:04:34 -0000 1.25
+++ swsusp.h 12 Sep 2006 16:56:48 -0000
@@ -26,7 +26,12 @@
#define SNAPSHOT_FREE_SWAP_PAGES _IO(SNAPSHOT_IOC_MAGIC, 9)
#define SNAPSHOT_SET_SWAP_FILE _IOW(SNAPSHOT_IOC_MAGIC, 10, unsigned
int)
#define SNAPSHOT_S2RAM _IO(SNAPSHOT_IOC_MAGIC, 11)
-#define SNAPSHOT_IOC_MAXNR 11
+#define SNAPSHOT_PMOPS _IOW(SNAPSHOT_IOC_MAGIC, 12, unsigned
int)
+#define SNAPSHOT_IOC_MAXNR 12
+
+#define PMOPS_PREPARE 1
+#define PMOPS_ENTER 2
+#define PMOPS_FINISH 3
#define LINUX_REBOOT_MAGIC1 0xfee1dead
#define LINUX_REBOOT_MAGIC2 672274793
@@ -98,6 +103,11 @@ static inline int atomic_restore(int dev
return ioctl(dev, SNAPSHOT_ATOMIC_RESTORE, 0);
}
+static inline void platform_finish(int dev)
+{
+ ioctl (dev, SNAPSHOT_PMOPS, PMOPS_FINISH);
+}
+
static inline int free_snapshot(int dev)
{
return ioctl(dev, SNAPSHOT_FREE, 0);
--
Stefan Seyfried | "Please, just tell people
QA / R&D Team Mobile Devices | to use KDE."
SUSE LINUX Products GmbH, Nürnberg | -- Linus Torvalds
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