#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
+#include <linux/workqueue.h>
#include "shpchp.h"
/* Global variables */
int shpchp_poll_mode;
int shpchp_poll_time;
LIST_HEAD(shpchp_ctrl_list);
+struct workqueue_struct *shpchp_wq;
#define DRIVER_VERSION "0.4"
#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
#define SHPC_MODULE_NAME "shpchp"
-static int shpc_start_thread (void);
static int set_attention_status (struct hotplug_slot *slot, u8 value);
static int enable_slot (struct hotplug_slot *slot);
static int disable_slot (struct hotplug_slot *slot);
goto error_info;
slot->number = sun;
+ INIT_WORK(&slot->work, shpchp_pushbutton_thread, slot);
/* register this slot with the hotplug pci core */
hotplug_slot->private = slot;
return retval;
}
-static void cleanup_slots(struct controller *ctrl)
+void cleanup_slots(struct controller *ctrl)
{
struct list_head *tmp;
struct list_head *next;
list_for_each_safe(tmp, next, &ctrl->slot_list) {
slot = list_entry(tmp, struct slot, slot_list);
list_del(&slot->slot_list);
+ cancel_delayed_work(&slot->work);
+ flush_workqueue(shpchp_wq);
pci_hp_deregister(slot->hotplug_slot);
}
}
rc = get_ctlr_slot_config(ctrl);
if (rc) {
err(msg_initialization_err, rc);
- goto err_out_unmap_mmio_region;
+ goto err_out_release_ctlr;
}
first_device_num = ctrl->slot_device_offset;
num_ctlr_slots = ctrl->num_slots;
rc = init_slots(ctrl);
if (rc) {
err(msg_initialization_err, 6);
- goto err_out_free_ctrl_slot;
+ goto err_out_release_ctlr;
}
/* Now hpc_functions (slot->hpc_ops->functions) are ready */
ctrl->speed = PCI_SPEED_33MHz;
}
- /* Finish setting up the hot plug ctrl device */
- ctrl->next_event = 0;
-
list_add(&ctrl->ctrl_list, &shpchp_ctrl_list);
shpchp_create_ctrl_files(ctrl);
return 0;
-err_out_free_ctrl_slot:
- cleanup_slots(ctrl);
-err_out_unmap_mmio_region:
+err_out_release_ctlr:
ctrl->hpc_ops->release_ctlr(ctrl);
err_out_free_ctrl:
kfree(ctrl);
return -ENODEV;
}
-static int shpc_start_thread(void)
-{
- int retval = 0;
-
- dbg("Initialize + Start the notification/polling mechanism \n");
-
- retval = shpchp_event_start_thread();
- if (retval) {
- dbg("shpchp_event_start_thread() failed\n");
- return retval;
- }
-
- return retval;
-}
-
static void __exit unload_shpchpd(void)
{
struct list_head *tmp;
list_for_each_safe(tmp, next, &shpchp_ctrl_list) {
ctrl = list_entry(tmp, struct controller, ctrl_list);
shpchp_remove_ctrl_files(ctrl);
- cleanup_slots(ctrl);
ctrl->hpc_ops->release_ctlr(ctrl);
kfree(ctrl);
}
- /* Stop the notification mechanism */
- shpchp_event_stop_thread();
-
+ destroy_workqueue(shpchp_wq);
}
static struct pci_device_id shpcd_pci_tbl[] = {
shpchp_poll_mode = 1;
#endif
- retval = shpc_start_thread();
- if (retval)
- goto error_hpc_init;
+ shpchp_wq = create_singlethread_workqueue("shpchpd");
+ if (!shpchp_wq)
+ return -ENOMEM;
retval = pci_register_driver(&shpc_driver);
dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval);
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
-
-error_hpc_init:
if (retval) {
- shpchp_event_stop_thread();
+ destroy_workqueue(shpchp_wq);
}
return retval;
}
#include <linux/types.h>
#include <linux/smp_lock.h>
#include <linux/pci.h>
+#include <linux/workqueue.h>
#include "../pci.h"
#include "shpchp.h"
-static void interrupt_event_handler(struct controller *ctrl);
+static void interrupt_event_handler(void *data);
-static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */
-static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */
-static int event_finished;
-static unsigned long pushbutton_pending; /* = 0 */
+static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
+{
+ struct event_info *info;
+
+ info = kmalloc(sizeof(*info), GFP_ATOMIC);
+ if (!info)
+ return -ENOMEM;
+
+ info->event_type = event_type;
+ info->p_slot = p_slot;
+ INIT_WORK(&info->work, interrupt_event_handler, info);
+
+ queue_work(shpchp_wq, &info->work);
+
+ return 0;
+}
u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
- u8 rc = 0;
- u8 getstatus;
- struct event_info *taskInfo;
+ u32 event_type;
/* Attention Button Change */
dbg("shpchp: Attention button interrupt received.\n");
- /* This is the structure that tells the worker thread what to do */
- taskInfo = &(ctrl->event_queue[ctrl->next_event]);
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
-
p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
- p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
-
- ctrl->next_event = (ctrl->next_event + 1) % 10;
- taskInfo->hp_slot = hp_slot;
-
- rc++;
/*
* Button pressed - See if need to TAKE ACTION!!!
*/
info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
- taskInfo->event_type = INT_BUTTON_PRESS;
+ event_type = INT_BUTTON_PRESS;
if ((p_slot->state == BLINKINGON_STATE)
|| (p_slot->state == BLINKINGOFF_STATE)) {
* attention again before the 5 sec. limit expires to cancel hot-add
* or hot-remove
*/
- taskInfo->event_type = INT_BUTTON_CANCEL;
+ event_type = INT_BUTTON_CANCEL;
info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
} else if ((p_slot->state == POWERON_STATE)
|| (p_slot->state == POWEROFF_STATE)) {
* means that the previous attention button action to hot-add or
* hot-remove is undergoing
*/
- taskInfo->event_type = INT_BUTTON_IGNORE;
+ event_type = INT_BUTTON_IGNORE;
info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
}
- if (rc)
- up(&event_semaphore); /* signal event thread that new event is posted */
+ queue_interrupt_event(p_slot, event_type);
return 0;
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
- u8 rc = 0;
u8 getstatus;
- struct event_info *taskInfo;
+ u32 event_type;
/* Switch Change */
dbg("shpchp: Switch interrupt received.\n");
- /* This is the structure that tells the worker thread
- * what to do
- */
- taskInfo = &(ctrl->event_queue[ctrl->next_event]);
- ctrl->next_event = (ctrl->next_event + 1) % 10;
- taskInfo->hp_slot = hp_slot;
-
- rc++;
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
* Switch opened
*/
info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
- taskInfo->event_type = INT_SWITCH_OPEN;
+ event_type = INT_SWITCH_OPEN;
if (p_slot->pwr_save && p_slot->presence_save) {
- taskInfo->event_type = INT_POWER_FAULT;
+ event_type = INT_POWER_FAULT;
err("Surprise Removal of card\n");
}
} else {
* Switch closed
*/
info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
- taskInfo->event_type = INT_SWITCH_CLOSE;
+ event_type = INT_SWITCH_CLOSE;
}
- if (rc)
- up(&event_semaphore); /* signal event thread that new event is posted */
+ queue_interrupt_event(p_slot, event_type);
- return rc;
+ return 1;
}
u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id)
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
- u8 rc = 0;
- /*u8 temp_byte;*/
- struct event_info *taskInfo;
+ u32 event_type;
/* Presence Change */
dbg("shpchp: Presence/Notify input change.\n");
- /* This is the structure that tells the worker thread
- * what to do
- */
- taskInfo = &(ctrl->event_queue[ctrl->next_event]);
- ctrl->next_event = (ctrl->next_event + 1) % 10;
- taskInfo->hp_slot = hp_slot;
-
- rc++;
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
/*
* Card Present
*/
info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
- taskInfo->event_type = INT_PRESENCE_ON;
+ event_type = INT_PRESENCE_ON;
} else {
/*
* Not Present
*/
info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
- taskInfo->event_type = INT_PRESENCE_OFF;
+ event_type = INT_PRESENCE_OFF;
}
- if (rc)
- up(&event_semaphore); /* signal event thread that new event is posted */
+ queue_interrupt_event(p_slot, event_type);
- return rc;
+ return 1;
}
u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id)
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
- u8 rc = 0;
- struct event_info *taskInfo;
+ u32 event_type;
/* Power fault */
dbg("shpchp: Power fault interrupt received.\n");
- /* This is the structure that tells the worker thread
- * what to do
- */
- taskInfo = &(ctrl->event_queue[ctrl->next_event]);
- ctrl->next_event = (ctrl->next_event + 1) % 10;
- taskInfo->hp_slot = hp_slot;
-
- rc++;
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
*/
info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
p_slot->status = 0x00;
- taskInfo->event_type = INT_POWER_FAULT_CLEAR;
+ event_type = INT_POWER_FAULT_CLEAR;
} else {
/*
* Power fault
*/
info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
- taskInfo->event_type = INT_POWER_FAULT;
+ event_type = INT_POWER_FAULT;
/* set power fault status for this board */
p_slot->status = 0xFF;
info("power fault bit %x set\n", hp_slot);
}
- if (rc)
- up(&event_semaphore); /* signal event thread that new event is posted */
- return rc;
+ queue_interrupt_event(p_slot, event_type);
+
+ return 1;
}
/* The following routines constitute the bulk of the
}
-static void pushbutton_helper_thread (unsigned long data)
-{
- pushbutton_pending = data;
-
- up(&event_semaphore);
-}
-
-
/**
* shpchp_pushbutton_thread
*
* Handles all pending events and exits.
*
*/
-static void shpchp_pushbutton_thread (unsigned long slot)
+void shpchp_pushbutton_thread(void *data)
{
- struct slot *p_slot = (struct slot *) slot;
+ struct slot *p_slot = data;
u8 getstatus;
-
- pushbutton_pending = 0;
-
- if (!p_slot) {
- dbg("%s: Error! slot NULL\n", __FUNCTION__);
- return;
- }
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (getstatus) {
p_slot->state = POWEROFF_STATE;
-
shpchp_disable_slot(p_slot);
p_slot->state = STATIC_STATE;
} else {
p_slot->state = POWERON_STATE;
-
if (shpchp_enable_slot(p_slot))
p_slot->hpc_ops->green_led_off(p_slot);
-
p_slot->state = STATIC_STATE;
}
-
- return;
-}
-
-
-/* this is the main worker thread */
-static int event_thread(void* data)
-{
- struct controller *ctrl;
- lock_kernel();
- daemonize("shpchpd_event");
- unlock_kernel();
-
- while (1) {
- dbg("!!!!event_thread sleeping\n");
- down_interruptible (&event_semaphore);
- dbg("event_thread woken finished = %d\n", event_finished);
- if (event_finished || signal_pending(current))
- break;
- /* Do stuff here */
- if (pushbutton_pending)
- shpchp_pushbutton_thread(pushbutton_pending);
- else
- list_for_each_entry(ctrl, &shpchp_ctrl_list, ctrl_list)
- interrupt_event_handler(ctrl);
- }
- dbg("event_thread signals exit\n");
- up(&event_exit);
- return 0;
-}
-
-int shpchp_event_start_thread (void)
-{
- int pid;
-
- /* initialize our semaphores */
- init_MUTEX_LOCKED(&event_exit);
- event_finished=0;
-
- init_MUTEX_LOCKED(&event_semaphore);
- pid = kernel_thread(event_thread, NULL, 0);
-
- if (pid < 0) {
- err ("Can't start up our event thread\n");
- return -1;
- }
- return 0;
-}
-
-
-void shpchp_event_stop_thread (void)
-{
- event_finished = 1;
- up(&event_semaphore);
- down(&event_exit);
}
-
static int update_slot_info (struct slot *slot)
{
struct hotplug_slot_info *info;
return result;
}
-static void interrupt_event_handler(struct controller *ctrl)
+static void interrupt_event_handler(void *data)
{
- int loop = 0;
- int change = 1;
- u8 hp_slot;
+ struct event_info *info = data;
+ struct slot *p_slot = info->p_slot;
u8 getstatus;
- struct slot *p_slot;
- while (change) {
- change = 0;
-
- for (loop = 0; loop < 10; loop++) {
- if (ctrl->event_queue[loop].event_type != 0) {
- dbg("%s:loop %x event_type %x\n", __FUNCTION__, loop,
- ctrl->event_queue[loop].event_type);
- hp_slot = ctrl->event_queue[loop].hp_slot;
-
- p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
-
- if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
- dbg("%s: button cancel\n", __FUNCTION__);
- del_timer(&p_slot->task_event);
-
- switch (p_slot->state) {
- case BLINKINGOFF_STATE:
- p_slot->hpc_ops->green_led_on(p_slot);
- p_slot->hpc_ops->set_attention_status(p_slot, 0);
- break;
- case BLINKINGON_STATE:
- p_slot->hpc_ops->green_led_off(p_slot);
- p_slot->hpc_ops->set_attention_status(p_slot, 0);
- break;
- default:
- warn("Not a valid state\n");
- return;
- }
- info(msg_button_cancel, p_slot->number);
- p_slot->state = STATIC_STATE;
- } else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
- /* Button Pressed (No action on 1st press...) */
- dbg("%s: Button pressed\n", __FUNCTION__);
-
- p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
- if (getstatus) {
- /* slot is on */
- dbg("%s: slot is on\n", __FUNCTION__);
- p_slot->state = BLINKINGOFF_STATE;
- info(msg_button_off, p_slot->number);
- } else {
- /* slot is off */
- dbg("%s: slot is off\n", __FUNCTION__);
- p_slot->state = BLINKINGON_STATE;
- info(msg_button_on, p_slot->number);
- }
-
- /* blink green LED and turn off amber */
- p_slot->hpc_ops->green_led_blink(p_slot);
- p_slot->hpc_ops->set_attention_status(p_slot, 0);
-
- init_timer(&p_slot->task_event);
- p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
- p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
- p_slot->task_event.data = (unsigned long) p_slot;
-
- dbg("%s: add_timer p_slot = %p\n", __FUNCTION__,(void *) p_slot);
- add_timer(&p_slot->task_event);
- } else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
- /***********POWER FAULT********************/
- dbg("%s: power fault\n", __FUNCTION__);
- p_slot->hpc_ops->set_attention_status(p_slot, 1);
- p_slot->hpc_ops->green_led_off(p_slot);
- } else {
- /* refresh notification */
- if (p_slot)
- update_slot_info(p_slot);
- }
-
- ctrl->event_queue[loop].event_type = 0;
+ switch (info->event_type) {
+ case INT_BUTTON_CANCEL:
+ dbg("%s: button cancel\n", __FUNCTION__);
+ cancel_delayed_work(&p_slot->work);
+ switch (p_slot->state) {
+ case BLINKINGOFF_STATE:
+ p_slot->hpc_ops->green_led_on(p_slot);
+ p_slot->hpc_ops->set_attention_status(p_slot, 0);
+ break;
+ case BLINKINGON_STATE:
+ p_slot->hpc_ops->green_led_off(p_slot);
+ p_slot->hpc_ops->set_attention_status(p_slot, 0);
+ break;
+ default:
+ warn("Not a valid state\n");
+ return;
+ }
+ info(msg_button_cancel, p_slot->number);
+ p_slot->state = STATIC_STATE;
+ break;
+ case INT_BUTTON_PRESS:
+ dbg("%s: Button pressed\n", __FUNCTION__);
+ p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
+ if (getstatus) {
+ p_slot->state = BLINKINGOFF_STATE;
+ info(msg_button_off, p_slot->number);
+ } else {
+ p_slot->state = BLINKINGON_STATE;
+ info(msg_button_on, p_slot->number);
+ }
+ /* blink green LED and turn off amber */
+ p_slot->hpc_ops->green_led_blink(p_slot);
+ p_slot->hpc_ops->set_attention_status(p_slot, 0);
- change = 1;
- }
- } /* End of FOR loop */
+ queue_delayed_work(shpchp_wq, &p_slot->work, 5*HZ);
+ break;
+ case INT_POWER_FAULT:
+ dbg("%s: power fault\n", __FUNCTION__);
+ p_slot->hpc_ops->set_attention_status(p_slot, 1);
+ p_slot->hpc_ops->green_led_off(p_slot);
+ break;
+ default:
+ update_slot_info(p_slot);
+ break;
}
- return;
+ kfree(info);
}
projects / users / hch / configfs.git / commitdiff