mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 17:01:14 +00:00
s390/sclp: Remove sclp base power management support
Power management support was removed for s390 with
commit 394216275c
("s390: remove broken hibernate / power management
support").
Remove leftover sclp base-related power management code. Note that we
keep the registration of the sclp platform driver since it is used to
externalize non-PM related attributes in sysfs.
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
parent
9b357ccddb
commit
2f7e52084e
3 changed files with 1 additions and 187 deletions
|
@ -17,8 +17,6 @@
|
|||
#include <linux/reboot.h>
|
||||
#include <linux/jiffies.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/suspend.h>
|
||||
#include <linux/completion.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <asm/types.h>
|
||||
#include <asm/irq.h>
|
||||
|
@ -48,9 +46,6 @@ static struct sclp_req sclp_init_req;
|
|||
static void *sclp_read_sccb;
|
||||
static struct init_sccb *sclp_init_sccb;
|
||||
|
||||
/* Suspend request */
|
||||
static DECLARE_COMPLETION(sclp_request_queue_flushed);
|
||||
|
||||
/* Number of console pages to allocate, used by sclp_con.c and sclp_vt220.c */
|
||||
int sclp_console_pages = SCLP_CONSOLE_PAGES;
|
||||
/* Flag to indicate if buffer pages are dropped on buffer full condition */
|
||||
|
@ -58,11 +53,6 @@ int sclp_console_drop = 1;
|
|||
/* Number of times the console dropped buffer pages */
|
||||
unsigned long sclp_console_full;
|
||||
|
||||
static void sclp_suspend_req_cb(struct sclp_req *req, void *data)
|
||||
{
|
||||
complete(&sclp_request_queue_flushed);
|
||||
}
|
||||
|
||||
static int __init sclp_setup_console_pages(char *str)
|
||||
{
|
||||
int pages, rc;
|
||||
|
@ -87,8 +77,6 @@ static int __init sclp_setup_console_drop(char *str)
|
|||
|
||||
__setup("sclp_con_drop=", sclp_setup_console_drop);
|
||||
|
||||
static struct sclp_req sclp_suspend_req;
|
||||
|
||||
/* Timer for request retries. */
|
||||
static struct timer_list sclp_request_timer;
|
||||
|
||||
|
@ -122,12 +110,6 @@ static volatile enum sclp_mask_state_t {
|
|||
sclp_mask_state_initializing
|
||||
} sclp_mask_state = sclp_mask_state_idle;
|
||||
|
||||
/* Internal state: is the driver suspended? */
|
||||
static enum sclp_suspend_state_t {
|
||||
sclp_suspend_state_running,
|
||||
sclp_suspend_state_suspended,
|
||||
} sclp_suspend_state = sclp_suspend_state_running;
|
||||
|
||||
/* Maximum retry counts */
|
||||
#define SCLP_INIT_RETRY 3
|
||||
#define SCLP_MASK_RETRY 3
|
||||
|
@ -313,8 +295,6 @@ sclp_process_queue(void)
|
|||
del_timer(&sclp_request_timer);
|
||||
while (!list_empty(&sclp_req_queue)) {
|
||||
req = list_entry(sclp_req_queue.next, struct sclp_req, list);
|
||||
if (!req->sccb)
|
||||
goto do_post;
|
||||
rc = __sclp_start_request(req);
|
||||
if (rc == 0)
|
||||
break;
|
||||
|
@ -326,7 +306,6 @@ sclp_process_queue(void)
|
|||
sclp_request_timeout_normal);
|
||||
break;
|
||||
}
|
||||
do_post:
|
||||
/* Post-processing for aborted request */
|
||||
list_del(&req->list);
|
||||
if (req->callback) {
|
||||
|
@ -340,10 +319,8 @@ sclp_process_queue(void)
|
|||
|
||||
static int __sclp_can_add_request(struct sclp_req *req)
|
||||
{
|
||||
if (req == &sclp_suspend_req || req == &sclp_init_req)
|
||||
if (req == &sclp_init_req)
|
||||
return 1;
|
||||
if (sclp_suspend_state != sclp_suspend_state_running)
|
||||
return 0;
|
||||
if (sclp_init_state != sclp_init_state_initialized)
|
||||
return 0;
|
||||
if (sclp_activation_state != sclp_activation_state_active)
|
||||
|
@ -377,16 +354,10 @@ sclp_add_request(struct sclp_req *req)
|
|||
/* Start if request is first in list */
|
||||
if (sclp_running_state == sclp_running_state_idle &&
|
||||
req->list.prev == &sclp_req_queue) {
|
||||
if (!req->sccb) {
|
||||
list_del(&req->list);
|
||||
rc = -ENODATA;
|
||||
goto out;
|
||||
}
|
||||
rc = __sclp_start_request(req);
|
||||
if (rc)
|
||||
list_del(&req->list);
|
||||
}
|
||||
out:
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
return rc;
|
||||
}
|
||||
|
@ -692,7 +663,6 @@ sclp_register(struct sclp_register *reg)
|
|||
/* Trigger initial state change callback */
|
||||
reg->sclp_receive_mask = 0;
|
||||
reg->sclp_send_mask = 0;
|
||||
reg->pm_event_posted = 0;
|
||||
list_add(®->list, &sclp_reg_list);
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
rc = sclp_init_mask(1);
|
||||
|
@ -1010,112 +980,6 @@ static struct notifier_block sclp_reboot_notifier = {
|
|||
.notifier_call = sclp_reboot_event
|
||||
};
|
||||
|
||||
/*
|
||||
* Suspend/resume SCLP notifier implementation
|
||||
*/
|
||||
|
||||
static void sclp_pm_event(enum sclp_pm_event sclp_pm_event, int rollback)
|
||||
{
|
||||
struct sclp_register *reg;
|
||||
unsigned long flags;
|
||||
|
||||
if (!rollback) {
|
||||
spin_lock_irqsave(&sclp_lock, flags);
|
||||
list_for_each_entry(reg, &sclp_reg_list, list)
|
||||
reg->pm_event_posted = 0;
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
}
|
||||
do {
|
||||
spin_lock_irqsave(&sclp_lock, flags);
|
||||
list_for_each_entry(reg, &sclp_reg_list, list) {
|
||||
if (rollback && reg->pm_event_posted)
|
||||
goto found;
|
||||
if (!rollback && !reg->pm_event_posted)
|
||||
goto found;
|
||||
}
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
return;
|
||||
found:
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
if (reg->pm_event_fn)
|
||||
reg->pm_event_fn(reg, sclp_pm_event);
|
||||
reg->pm_event_posted = rollback ? 0 : 1;
|
||||
} while (1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Susend/resume callbacks for platform device
|
||||
*/
|
||||
|
||||
static int sclp_freeze(struct device *dev)
|
||||
{
|
||||
unsigned long flags;
|
||||
int rc;
|
||||
|
||||
sclp_pm_event(SCLP_PM_EVENT_FREEZE, 0);
|
||||
|
||||
spin_lock_irqsave(&sclp_lock, flags);
|
||||
sclp_suspend_state = sclp_suspend_state_suspended;
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
|
||||
/* Init supend data */
|
||||
memset(&sclp_suspend_req, 0, sizeof(sclp_suspend_req));
|
||||
sclp_suspend_req.callback = sclp_suspend_req_cb;
|
||||
sclp_suspend_req.status = SCLP_REQ_FILLED;
|
||||
init_completion(&sclp_request_queue_flushed);
|
||||
|
||||
rc = sclp_add_request(&sclp_suspend_req);
|
||||
if (rc == 0)
|
||||
wait_for_completion(&sclp_request_queue_flushed);
|
||||
else if (rc != -ENODATA)
|
||||
goto fail_thaw;
|
||||
|
||||
rc = sclp_deactivate();
|
||||
if (rc)
|
||||
goto fail_thaw;
|
||||
return 0;
|
||||
|
||||
fail_thaw:
|
||||
spin_lock_irqsave(&sclp_lock, flags);
|
||||
sclp_suspend_state = sclp_suspend_state_running;
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
sclp_pm_event(SCLP_PM_EVENT_THAW, 1);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int sclp_undo_suspend(enum sclp_pm_event event)
|
||||
{
|
||||
unsigned long flags;
|
||||
int rc;
|
||||
|
||||
rc = sclp_reactivate();
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
spin_lock_irqsave(&sclp_lock, flags);
|
||||
sclp_suspend_state = sclp_suspend_state_running;
|
||||
spin_unlock_irqrestore(&sclp_lock, flags);
|
||||
|
||||
sclp_pm_event(event, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sclp_thaw(struct device *dev)
|
||||
{
|
||||
return sclp_undo_suspend(SCLP_PM_EVENT_THAW);
|
||||
}
|
||||
|
||||
static int sclp_restore(struct device *dev)
|
||||
{
|
||||
return sclp_undo_suspend(SCLP_PM_EVENT_RESTORE);
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops sclp_pm_ops = {
|
||||
.freeze = sclp_freeze,
|
||||
.thaw = sclp_thaw,
|
||||
.restore = sclp_restore,
|
||||
};
|
||||
|
||||
static ssize_t con_pages_show(struct device_driver *dev, char *buf)
|
||||
{
|
||||
return sprintf(buf, "%i\n", sclp_console_pages);
|
||||
|
@ -1154,13 +1018,10 @@ static const struct attribute_group *sclp_drv_attr_groups[] = {
|
|||
static struct platform_driver sclp_pdrv = {
|
||||
.driver = {
|
||||
.name = "sclp",
|
||||
.pm = &sclp_pm_ops,
|
||||
.groups = sclp_drv_attr_groups,
|
||||
},
|
||||
};
|
||||
|
||||
static struct platform_device *sclp_pdev;
|
||||
|
||||
/* Initialize SCLP driver. Return zero if driver is operational, non-zero
|
||||
* otherwise. */
|
||||
static int
|
||||
|
@ -1214,23 +1075,6 @@ sclp_init(void)
|
|||
return rc;
|
||||
}
|
||||
|
||||
/*
|
||||
* SCLP panic notifier: If we are suspended, we thaw SCLP in order to be able
|
||||
* to print the panic message.
|
||||
*/
|
||||
static int sclp_panic_notify(struct notifier_block *self,
|
||||
unsigned long event, void *data)
|
||||
{
|
||||
if (sclp_suspend_state == sclp_suspend_state_suspended)
|
||||
sclp_undo_suspend(SCLP_PM_EVENT_THAW);
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
static struct notifier_block sclp_on_panic_nb = {
|
||||
.notifier_call = sclp_panic_notify,
|
||||
.priority = SCLP_PANIC_PRIO,
|
||||
};
|
||||
|
||||
static __init int sclp_initcall(void)
|
||||
{
|
||||
int rc;
|
||||
|
@ -1239,23 +1083,7 @@ static __init int sclp_initcall(void)
|
|||
if (rc)
|
||||
return rc;
|
||||
|
||||
sclp_pdev = platform_device_register_simple("sclp", -1, NULL, 0);
|
||||
rc = PTR_ERR_OR_ZERO(sclp_pdev);
|
||||
if (rc)
|
||||
goto fail_platform_driver_unregister;
|
||||
|
||||
rc = atomic_notifier_chain_register(&panic_notifier_list,
|
||||
&sclp_on_panic_nb);
|
||||
if (rc)
|
||||
goto fail_platform_device_unregister;
|
||||
|
||||
return sclp_init();
|
||||
|
||||
fail_platform_device_unregister:
|
||||
platform_device_unregister(sclp_pdev);
|
||||
fail_platform_driver_unregister:
|
||||
platform_driver_unregister(&sclp_pdrv);
|
||||
return rc;
|
||||
}
|
||||
|
||||
arch_initcall(sclp_initcall);
|
||||
|
|
|
@ -81,15 +81,6 @@ typedef unsigned int sclp_cmdw_t;
|
|||
|
||||
#define GDS_KEY_SELFDEFTEXTMSG 0x31
|
||||
|
||||
enum sclp_pm_event {
|
||||
SCLP_PM_EVENT_FREEZE,
|
||||
SCLP_PM_EVENT_THAW,
|
||||
SCLP_PM_EVENT_RESTORE,
|
||||
};
|
||||
|
||||
#define SCLP_PANIC_PRIO 1
|
||||
#define SCLP_PANIC_PRIO_CLIENT 0
|
||||
|
||||
typedef u64 sccb_mask_t;
|
||||
|
||||
struct sccb_header {
|
||||
|
@ -293,10 +284,6 @@ struct sclp_register {
|
|||
void (*state_change_fn)(struct sclp_register *);
|
||||
/* called for events in cp_receive_mask/sclp_receive_mask */
|
||||
void (*receiver_fn)(struct evbuf_header *);
|
||||
/* called for power management events */
|
||||
void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
|
||||
/* pm event posted flag */
|
||||
int pm_event_posted;
|
||||
};
|
||||
|
||||
/* externals from sclp.c */
|
||||
|
|
|
@ -231,7 +231,6 @@ static struct sclp_register sclp_ftp_event = {
|
|||
.receive_mask = EVTYP_DIAG_TEST_MASK, /* want rx events */
|
||||
.receiver_fn = sclp_ftp_rxcb, /* async callback (rx) */
|
||||
.state_change_fn = NULL,
|
||||
.pm_event_fn = NULL,
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
Loading…
Reference in a new issue