diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/platforms/pseries/suspend.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/platforms/pseries/suspend.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/suspend.c b/ANDROID_3.4.5/arch/powerpc/platforms/pseries/suspend.c deleted file mode 100644 index 47226e04..00000000 --- a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/suspend.c +++ /dev/null @@ -1,220 +0,0 @@ -/* - * Copyright (C) 2010 Brian King IBM Corporation - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/delay.h> -#include <linux/suspend.h> -#include <linux/stat.h> -#include <asm/firmware.h> -#include <asm/hvcall.h> -#include <asm/machdep.h> -#include <asm/mmu.h> -#include <asm/rtas.h> -#include <asm/topology.h> - -static u64 stream_id; -static struct device suspend_dev; -static DECLARE_COMPLETION(suspend_work); -static struct rtas_suspend_me_data suspend_data; -static atomic_t suspending; - -/** - * pseries_suspend_begin - First phase of hibernation - * - * Check to ensure we are in a valid state to hibernate - * - * Return value: - * 0 on success / other on failure - **/ -static int pseries_suspend_begin(suspend_state_t state) -{ - long vasi_state, rc; - unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; - - /* Make sure the state is valid */ - rc = plpar_hcall(H_VASI_STATE, retbuf, stream_id); - - vasi_state = retbuf[0]; - - if (rc) { - pr_err("pseries_suspend_begin: vasi_state returned %ld\n",rc); - return rc; - } else if (vasi_state == H_VASI_ENABLED) { - return -EAGAIN; - } else if (vasi_state != H_VASI_SUSPENDING) { - pr_err("pseries_suspend_begin: vasi_state returned state %ld\n", - vasi_state); - return -EIO; - } - - return 0; -} - -/** - * pseries_suspend_cpu - Suspend a single CPU - * - * Makes the H_JOIN call to suspend the CPU - * - **/ -static int pseries_suspend_cpu(void) -{ - if (atomic_read(&suspending)) - return rtas_suspend_cpu(&suspend_data); - return 0; -} - -/** - * pseries_suspend_enter - Final phase of hibernation - * - * Return value: - * 0 on success / other on failure - **/ -static int pseries_suspend_enter(suspend_state_t state) -{ - int rc = rtas_suspend_last_cpu(&suspend_data); - - atomic_set(&suspending, 0); - atomic_set(&suspend_data.done, 1); - return rc; -} - -/** - * pseries_prepare_late - Prepare to suspend all other CPUs - * - * Return value: - * 0 on success / other on failure - **/ -static int pseries_prepare_late(void) -{ - atomic_set(&suspending, 1); - atomic_set(&suspend_data.working, 0); - atomic_set(&suspend_data.done, 0); - atomic_set(&suspend_data.error, 0); - suspend_data.complete = &suspend_work; - INIT_COMPLETION(suspend_work); - return 0; -} - -/** - * store_hibernate - Initiate partition hibernation - * @dev: subsys root device - * @attr: device attribute struct - * @buf: buffer - * @count: buffer size - * - * Write the stream ID received from the HMC to this file - * to trigger hibernating the partition - * - * Return value: - * number of bytes printed to buffer / other on failure - **/ -static ssize_t store_hibernate(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - int rc; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - stream_id = simple_strtoul(buf, NULL, 16); - - do { - rc = pseries_suspend_begin(PM_SUSPEND_MEM); - if (rc == -EAGAIN) - ssleep(1); - } while (rc == -EAGAIN); - - if (!rc) { - stop_topology_update(); - rc = pm_suspend(PM_SUSPEND_MEM); - start_topology_update(); - } - - stream_id = 0; - - if (!rc) - rc = count; - return rc; -} - -static DEVICE_ATTR(hibernate, S_IWUSR, NULL, store_hibernate); - -static struct bus_type suspend_subsys = { - .name = "power", - .dev_name = "power", -}; - -static const struct platform_suspend_ops pseries_suspend_ops = { - .valid = suspend_valid_only_mem, - .begin = pseries_suspend_begin, - .prepare_late = pseries_prepare_late, - .enter = pseries_suspend_enter, -}; - -/** - * pseries_suspend_sysfs_register - Register with sysfs - * - * Return value: - * 0 on success / other on failure - **/ -static int pseries_suspend_sysfs_register(struct device *dev) -{ - int rc; - - if ((rc = subsys_system_register(&suspend_subsys, NULL))) - return rc; - - dev->id = 0; - dev->bus = &suspend_subsys; - - if ((rc = device_create_file(suspend_subsys.dev_root, &dev_attr_hibernate))) - goto subsys_unregister; - - return 0; - -subsys_unregister: - bus_unregister(&suspend_subsys); - return rc; -} - -/** - * pseries_suspend_init - initcall for pSeries suspend - * - * Return value: - * 0 on success / other on failure - **/ -static int __init pseries_suspend_init(void) -{ - int rc; - - if (!machine_is(pseries) || !firmware_has_feature(FW_FEATURE_LPAR)) - return 0; - - suspend_data.token = rtas_token("ibm,suspend-me"); - if (suspend_data.token == RTAS_UNKNOWN_SERVICE) - return 0; - - if ((rc = pseries_suspend_sysfs_register(&suspend_dev))) - return rc; - - ppc_md.suspend_disable_cpu = pseries_suspend_cpu; - suspend_set_ops(&pseries_suspend_ops); - return 0; -} - -__initcall(pseries_suspend_init); |