#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(struct work_struct *work);
+static int shpchp_enable_slot(struct slot *p_slot);
+static int shpchp_disable_slot(struct slot *p_slot);
-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);
+
+ schedule_work(&info->work);
-u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
+ return 0;
+}
+
+u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl)
{
- 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;
-
- if ((p_slot->state == BLINKINGON_STATE)
- || (p_slot->state == BLINKINGOFF_STATE)) {
- /* Cancel if we are still blinking; this means that we press the
- * attention again before the 5 sec. limit expires to cancel hot-add
- * or hot-remove
- */
- taskInfo->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)) {
- /* Ignore if the slot is on power-on or power-off state; this
- * means that the previous attention button action to hot-add or
- * hot-remove is undergoing
- */
- taskInfo->event_type = INT_BUTTON_IGNORE;
- info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
- }
+ info("Button pressed on Slot(%s)\n", p_slot->name);
+ event_type = INT_BUTTON_PRESS;
- if (rc)
- up(&event_semaphore); /* signal event thread that new event is posted */
+ queue_interrupt_event(p_slot, event_type);
return 0;
}
-u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id)
+u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
{
- 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;
+ info("Latch open on Slot(%s)\n", p_slot->name);
+ 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;
+ info("Latch close on Slot(%s)\n", p_slot->name);
+ 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)
+u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
{
- 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;
+ info("Card present on Slot(%s)\n", p_slot->name);
+ 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;
+ info("Card not present on Slot(%s)\n", p_slot->name);
+ 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)
+u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
{
- 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))) {
/*
* Power fault Cleared
*/
- info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
+ info("Power fault cleared on Slot(%s)\n", p_slot->name);
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;
+ info("Power fault on Slot(%s)\n", p_slot->name);
+ 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
int rc = 0;
dbg("%s: change to speed %d\n", __FUNCTION__, speed);
- down(&ctrl->crit_sect);
if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) {
- err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
- up(&ctrl->crit_sect);
+ err("%s: Issue of set bus speed mode command failed\n",
+ __FUNCTION__);
return WRONG_BUS_FREQUENCY;
}
-
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
- __FUNCTION__);
- err("%s: Error code (%d)\n", __FUNCTION__, rc);
- up(&ctrl->crit_sect);
- return WRONG_BUS_FREQUENCY;
- }
- up(&ctrl->crit_sect);
return rc;
}
enum pci_bus_speed msp)
{
int rc = 0;
-
- if (flag != 0) { /* Other slots on the same bus are occupied */
- if ( asp < bsp ) {
- err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bsp, asp);
- return WRONG_BUS_FREQUENCY;
+
+ /*
+ * If other slots on the same bus are occupied, we cannot
+ * change the bus speed.
+ */
+ if (flag) {
+ if (asp < bsp) {
+ err("%s: speed of bus %x and adapter %x mismatch\n",
+ __FUNCTION__, bsp, asp);
+ rc = WRONG_BUS_FREQUENCY;
}
+ return rc;
+ }
+
+ if (asp < msp) {
+ if (bsp != asp)
+ rc = change_bus_speed(ctrl, pslot, asp);
} else {
- /* Other slots on the same bus are empty */
- if (msp == bsp) {
- /* if adapter_speed >= bus_speed, do nothing */
- if (asp < bsp) {
- /*
- * Try to lower bus speed to accommodate the adapter if other slots
- * on the same controller are empty
- */
- if ((rc = change_bus_speed(ctrl, pslot, asp)))
- return rc;
- }
- } else {
- if (asp < msp) {
- if ((rc = change_bus_speed(ctrl, pslot, asp)))
- return rc;
- } else {
- if ((rc = change_bus_speed(ctrl, pslot, msp)))
- return rc;
- }
- }
+ if (bsp != msp)
+ rc = change_bus_speed(ctrl, pslot, msp);
}
return rc;
}
u8 hp_slot;
u8 slots_not_empty = 0;
int rc = 0;
- enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed;
- u8 pi, mode;
+ enum pci_bus_speed asp, bsp, msp;
struct controller *ctrl = p_slot->ctrl;
hp_slot = p_slot->device - ctrl->slot_device_offset;
__FUNCTION__, p_slot->device,
ctrl->slot_device_offset, hp_slot);
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
/* Power on slot without connecting to bus */
rc = p_slot->hpc_ops->power_on_slot(p_slot);
if (rc) {
err("%s: Failed to power on slot\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
return -1;
}
- rc = p_slot->hpc_ops->check_cmd_status(ctrl);
- if (rc) {
- err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
- return -1;
- }
-
-
if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
if (slots_not_empty)
return WRONG_BUS_FREQUENCY;
if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) {
err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
- up(&ctrl->crit_sect);
return WRONG_BUS_FREQUENCY;
}
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
- __FUNCTION__);
- err("%s: Error code (%d)\n", __FUNCTION__, rc);
- up(&ctrl->crit_sect);
- return WRONG_BUS_FREQUENCY;
- }
/* turn on board, blink green LED, turn off Amber LED */
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
- up(&ctrl->crit_sect);
return rc;
}
-
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
- up(&ctrl->crit_sect);
- return rc;
- }
}
- rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed);
- /* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */
- /* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */
- /* 0xd = PCI-X 133 Mhz 533 */
- /* This encoding is different from the one used in cur_bus_speed & */
- /* max_bus_speed */
-
- if (rc || adapter_speed == PCI_SPEED_UNKNOWN) {
- err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
+ rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &asp);
+ if (rc) {
+ err("%s: Can't get adapter speed or bus mode mismatch\n",
+ __FUNCTION__);
return WRONG_BUS_FREQUENCY;
}
- rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed);
- if (rc || bus_speed == PCI_SPEED_UNKNOWN) {
+ rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bsp);
+ if (rc) {
err("%s: Can't get bus operation speed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
return WRONG_BUS_FREQUENCY;
}
- rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed);
- if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) {
+ rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &msp);
+ if (rc) {
err("%s: Can't get max bus operation speed\n", __FUNCTION__);
- max_bus_speed = bus_speed;
- }
-
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
-
- if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) {
- err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__);
- pi = 1;
+ msp = bsp;
}
/* Check if there are other slots or devices on the same bus */
if (!list_empty(&ctrl->pci_dev->subordinate->devices))
slots_not_empty = 1;
- dbg("%s: slots_not_empty %d, pi %d\n", __FUNCTION__,
- slots_not_empty, pi);
- dbg("adapter_speed %d, bus_speed %d, max_bus_speed %d\n",
- adapter_speed, bus_speed, max_bus_speed);
+ dbg("%s: slots_not_empty %d, adapter_speed %d, bus_speed %d, "
+ "max_bus_speed %d\n", __FUNCTION__, slots_not_empty, asp,
+ bsp, msp);
- if (pi == 2) {
- dbg("%s: In PI = %d\n", __FUNCTION__, pi);
- if ((rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode))) {
- err("%s: Can't get Mode1_ECC, set mode to 0\n", __FUNCTION__);
- mode = 0;
- }
-
- switch (adapter_speed) {
- case PCI_SPEED_133MHz_PCIX_533:
- case PCI_SPEED_133MHz_PCIX_266:
- if ((bus_speed != adapter_speed) &&
- ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
- return rc;
- break;
- case PCI_SPEED_133MHz_PCIX_ECC:
- case PCI_SPEED_133MHz_PCIX:
- if (mode) { /* Bus - Mode 1 ECC */
- if ((bus_speed != 0x7) &&
- ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
- return rc;
- } else {
- if ((bus_speed != 0x4) &&
- ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
- return rc;
- }
- break;
- case PCI_SPEED_66MHz_PCIX_ECC:
- case PCI_SPEED_66MHz_PCIX:
- if (mode) { /* Bus - Mode 1 ECC */
- if ((bus_speed != 0x5) &&
- ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
- return rc;
- } else {
- if ((bus_speed != 0x2) &&
- ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
- return rc;
- }
- break;
- case PCI_SPEED_66MHz:
- if ((bus_speed != 0x1) &&
- ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
- return rc;
- break;
- case PCI_SPEED_33MHz:
- if (bus_speed > 0x0) {
- if (slots_not_empty == 0) {
- if ((rc = change_bus_speed(ctrl, p_slot, adapter_speed)))
- return rc;
- } else {
- err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
- return WRONG_BUS_FREQUENCY;
- }
- }
- break;
- default:
- err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
- return WRONG_BUS_FREQUENCY;
- }
- } else {
- /* If adpater_speed == bus_speed, nothing to do here */
- dbg("%s: In PI = %d\n", __FUNCTION__, pi);
- if ((adapter_speed != bus_speed) &&
- ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed))))
- return rc;
- }
+ rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, asp, bsp, msp);
+ if (rc)
+ return rc;
- down(&ctrl->crit_sect);
/* turn on board, blink green LED, turn off Amber LED */
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
- up(&ctrl->crit_sect);
return rc;
}
- if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) {
- err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
- up(&ctrl->crit_sect);
- return rc;
- }
-
- up(&ctrl->crit_sect);
-
/* Wait for ~1 second */
- wait_for_ctrl_irq (ctrl);
+ msleep(1000);
dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status);
/* Check for a power fault */
p_slot->is_a_board = 0x01;
p_slot->pwr_save = 1;
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
p_slot->hpc_ops->green_led_on(p_slot);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
-
return 0;
err_exit:
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
/* turn off slot, turn on Amber LED, turn off Green LED */
rc = p_slot->hpc_ops->slot_disable(p_slot);
if (rc) {
err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
return rc;
}
- rc = p_slot->hpc_ops->check_cmd_status(ctrl);
- if (rc) {
- err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
- return rc;
- }
-
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
-
return(rc);
}
if (p_slot->is_a_board)
p_slot->status = 0x01;
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
/* turn off slot, turn on Amber LED, turn off Green LED */
rc = p_slot->hpc_ops->slot_disable(p_slot);
if (rc) {
err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
return rc;
}
-
- rc = p_slot->hpc_ops->check_cmd_status(ctrl);
- if (rc) {
- err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
- return rc;
- }
rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
if (rc) {
err("%s: Issue of Set Attention command failed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
return rc;
}
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
-
p_slot->pwr_save = 0;
p_slot->is_a_board = 0;
}
-static void pushbutton_helper_thread (unsigned long data)
-{
- pushbutton_pending = data;
-
- up(&event_semaphore);
-}
-
+struct pushbutton_work_info {
+ struct slot *p_slot;
+ struct work_struct work;
+};
/**
* shpchp_pushbutton_thread
* Handles all pending events and exits.
*
*/
-static void shpchp_pushbutton_thread (unsigned long slot)
+static void shpchp_pushbutton_thread(struct work_struct *work)
{
- struct slot *p_slot = (struct slot *) slot;
- 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;
-
+ struct pushbutton_work_info *info =
+ container_of(work, struct pushbutton_work_info, work);
+ struct slot *p_slot = info->p_slot;
+
+ mutex_lock(&p_slot->lock);
+ switch (p_slot->state) {
+ case POWEROFF_STATE:
+ mutex_unlock(&p_slot->lock);
shpchp_disable_slot(p_slot);
+ mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
- } else {
- p_slot->state = POWERON_STATE;
-
- if (shpchp_enable_slot(p_slot)) {
- /* Wait for exclusive access to hardware */
- down(&p_slot->ctrl->crit_sect);
-
+ break;
+ case POWERON_STATE:
+ mutex_unlock(&p_slot->lock);
+ if (shpchp_enable_slot(p_slot))
p_slot->hpc_ops->green_led_off(p_slot);
-
- /* Done with exclusive hardware access */
- up(&p_slot->ctrl->crit_sect);
- }
+ mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
+ break;
+ default:
+ break;
}
+ mutex_unlock(&p_slot->lock);
- 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
- for (ctrl = shpchp_ctrl_list; ctrl; ctrl=ctrl->next)
- interrupt_event_handler(ctrl);
- }
- dbg("event_thread signals exit\n");
- up(&event_exit);
- return 0;
+ kfree(info);
}
-int shpchp_event_start_thread (void)
+void queue_pushbutton_work(struct work_struct *work)
{
- int pid;
+ struct slot *p_slot = container_of(work, struct slot, work.work);
+ struct pushbutton_work_info *info;
- /* 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;
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ err("%s: Cannot allocate memory\n", __FUNCTION__);
+ return;
}
- return 0;
-}
-
+ info->p_slot = p_slot;
+ INIT_WORK(&info->work, shpchp_pushbutton_thread);
-void shpchp_event_stop_thread (void)
-{
- event_finished = 1;
- up(&event_semaphore);
- down(&event_exit);
+ mutex_lock(&p_slot->lock);
+ switch (p_slot->state) {
+ case BLINKINGOFF_STATE:
+ p_slot->state = POWEROFF_STATE;
+ break;
+ case BLINKINGON_STATE:
+ p_slot->state = POWERON_STATE;
+ break;
+ default:
+ goto out;
+ }
+ queue_work(shpchp_wq, &info->work);
+ out:
+ mutex_unlock(&p_slot->lock);
}
-
static int update_slot_info (struct slot *slot)
{
struct hotplug_slot_info *info;
return result;
}
-static void interrupt_event_handler(struct controller *ctrl)
+/*
+ * Note: This function must be called with slot->lock held
+ */
+static void handle_button_press_event(struct slot *p_slot)
{
- int loop = 0;
- int change = 1;
- u8 hp_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:
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
- p_slot->hpc_ops->green_led_on(p_slot);
-
- p_slot->hpc_ops->set_attention_status(p_slot, 0);
-
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
- break;
- case BLINKINGON_STATE:
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
- p_slot->hpc_ops->green_led_off(p_slot);
-
- p_slot->hpc_ops->set_attention_status(p_slot, 0);
-
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
-
- 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);
- }
-
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
- /* 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);
-
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
-
- 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__);
- /* Wait for exclusive access to hardware */
- down(&ctrl->crit_sect);
-
- p_slot->hpc_ops->set_attention_status(p_slot, 1);
-
- p_slot->hpc_ops->green_led_off(p_slot);
-
- /* Done with exclusive hardware access */
- up(&ctrl->crit_sect);
- } else {
- /* refresh notification */
- if (p_slot)
- update_slot_info(p_slot);
- }
-
- ctrl->event_queue[loop].event_type = 0;
-
- change = 1;
- }
- } /* End of FOR loop */
+ switch (p_slot->state) {
+ case STATIC_STATE:
+ p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
+ if (getstatus) {
+ p_slot->state = BLINKINGOFF_STATE;
+ info("PCI slot #%s - powering off due to button "
+ "press.\n", p_slot->name);
+ } else {
+ p_slot->state = BLINKINGON_STATE;
+ info("PCI slot #%s - powering on due to button "
+ "press.\n", p_slot->name);
+ }
+ /* 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);
+
+ schedule_delayed_work(&p_slot->work, 5*HZ);
+ break;
+ case BLINKINGOFF_STATE:
+ case BLINKINGON_STATE:
+ /*
+ * Cancel if we are still blinking; this means that we
+ * press the attention again before the 5 sec. limit
+ * expires to cancel hot-add or hot-remove
+ */
+ info("Button cancel on Slot(%s)\n", p_slot->name);
+ dbg("%s: button cancel\n", __FUNCTION__);
+ cancel_delayed_work(&p_slot->work);
+ if (p_slot->state == BLINKINGOFF_STATE)
+ p_slot->hpc_ops->green_led_on(p_slot);
+ else
+ p_slot->hpc_ops->green_led_off(p_slot);
+ p_slot->hpc_ops->set_attention_status(p_slot, 0);
+ info("PCI slot #%s - action canceled due to button press\n",
+ p_slot->name);
+ p_slot->state = STATIC_STATE;
+ break;
+ case POWEROFF_STATE:
+ case POWERON_STATE:
+ /*
+ * Ignore if the slot is on power-on or power-off state;
+ * this means that the previous attention button action
+ * to hot-add or hot-remove is undergoing
+ */
+ info("Button ignore on Slot(%s)\n", p_slot->name);
+ update_slot_info(p_slot);
+ break;
+ default:
+ warn("Not a valid state\n");
+ break;
}
+}
+
+static void interrupt_event_handler(struct work_struct *work)
+{
+ struct event_info *info = container_of(work, struct event_info, work);
+ struct slot *p_slot = info->p_slot;
+
+ mutex_lock(&p_slot->lock);
+ switch (info->event_type) {
+ case INT_BUTTON_PRESS:
+ handle_button_press_event(p_slot);
+ 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;
+ }
+ mutex_unlock(&p_slot->lock);
- return;
+ kfree(info);
}
-int shpchp_enable_slot (struct slot *p_slot)
+static int shpchp_enable_slot (struct slot *p_slot)
{
u8 getstatus = 0;
- int rc;
+ int rc, retval = -ENODEV;
/* Check to see if (latch closed, card present, power off) */
- down(&p_slot->ctrl->crit_sect);
+ mutex_lock(&p_slot->ctrl->crit_sect);
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
if (rc || !getstatus) {
- info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
- up(&p_slot->ctrl->crit_sect);
- return -ENODEV;
+ info("No adapter on slot(%s)\n", p_slot->name);
+ goto out;
}
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (rc || getstatus) {
- info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
- up(&p_slot->ctrl->crit_sect);
- return -ENODEV;
+ info("Latch open on slot(%s)\n", p_slot->name);
+ goto out;
}
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (rc || getstatus) {
- info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
- up(&p_slot->ctrl->crit_sect);
- return -ENODEV;
+ info("Already enabled on slot(%s)\n", p_slot->name);
+ goto out;
}
- up(&p_slot->ctrl->crit_sect);
p_slot->is_a_board = 1;
&& p_slot->ctrl->num_slots == 1) {
/* handle amd pogo errata; this must be done before enable */
amd_pogo_errata_save_misc_reg(p_slot);
- rc = board_added(p_slot);
+ retval = board_added(p_slot);
/* handle amd pogo errata; this must be done after enable */
amd_pogo_errata_restore_misc_reg(p_slot);
} else
- rc = board_added(p_slot);
+ retval = board_added(p_slot);
- if (rc) {
+ if (retval) {
p_slot->hpc_ops->get_adapter_status(p_slot,
&(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
}
update_slot_info(p_slot);
- return rc;
+ out:
+ mutex_unlock(&p_slot->ctrl->crit_sect);
+ return retval;
}
-int shpchp_disable_slot (struct slot *p_slot)
+static int shpchp_disable_slot (struct slot *p_slot)
{
u8 getstatus = 0;
- int ret = 0;
+ int rc, retval = -ENODEV;
if (!p_slot->ctrl)
return -ENODEV;
/* Check to see if (latch closed, card present, power on) */
- down(&p_slot->ctrl->crit_sect);
+ mutex_lock(&p_slot->ctrl->crit_sect);
- ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
- if (ret || !getstatus) {
- info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
- up(&p_slot->ctrl->crit_sect);
- return -ENODEV;
+ rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
+ if (rc || !getstatus) {
+ info("No adapter on slot(%s)\n", p_slot->name);
+ goto out;
}
- ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
- if (ret || getstatus) {
- info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
- up(&p_slot->ctrl->crit_sect);
- return -ENODEV;
+ rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
+ if (rc || getstatus) {
+ info("Latch open on slot(%s)\n", p_slot->name);
+ goto out;
}
- ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
- if (ret || !getstatus) {
- info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
- up(&p_slot->ctrl->crit_sect);
- return -ENODEV;
+ rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
+ if (rc || !getstatus) {
+ info("Already disabled slot(%s)\n", p_slot->name);
+ goto out;
}
- up(&p_slot->ctrl->crit_sect);
- ret = remove_board(p_slot);
+ retval = remove_board(p_slot);
update_slot_info(p_slot);
- return ret;
+ out:
+ mutex_unlock(&p_slot->ctrl->crit_sect);
+ return retval;
}
+int shpchp_sysfs_enable_slot(struct slot *p_slot)
+{
+ int retval = -ENODEV;
+
+ mutex_lock(&p_slot->lock);
+ switch (p_slot->state) {
+ case BLINKINGON_STATE:
+ cancel_delayed_work(&p_slot->work);
+ case STATIC_STATE:
+ p_slot->state = POWERON_STATE;
+ mutex_unlock(&p_slot->lock);
+ retval = shpchp_enable_slot(p_slot);
+ mutex_lock(&p_slot->lock);
+ p_slot->state = STATIC_STATE;
+ break;
+ case POWERON_STATE:
+ info("Slot %s is already in powering on state\n",
+ p_slot->name);
+ break;
+ case BLINKINGOFF_STATE:
+ case POWEROFF_STATE:
+ info("Already enabled on slot %s\n", p_slot->name);
+ break;
+ default:
+ err("Not a valid state on slot %s\n", p_slot->name);
+ break;
+ }
+ mutex_unlock(&p_slot->lock);
+
+ return retval;
+}
+
+int shpchp_sysfs_disable_slot(struct slot *p_slot)
+{
+ int retval = -ENODEV;
+
+ mutex_lock(&p_slot->lock);
+ switch (p_slot->state) {
+ case BLINKINGOFF_STATE:
+ cancel_delayed_work(&p_slot->work);
+ case STATIC_STATE:
+ p_slot->state = POWEROFF_STATE;
+ mutex_unlock(&p_slot->lock);
+ retval = shpchp_disable_slot(p_slot);
+ mutex_lock(&p_slot->lock);
+ p_slot->state = STATIC_STATE;
+ break;
+ case POWEROFF_STATE:
+ info("Slot %s is already in powering off state\n",
+ p_slot->name);
+ break;
+ case BLINKINGON_STATE:
+ case POWERON_STATE:
+ info("Already disabled on slot %s\n", p_slot->name);
+ break;
+ default:
+ err("Not a valid state on slot %s\n", p_slot->name);
+ break;
+ }
+ mutex_unlock(&p_slot->lock);
+
+ return retval;
+}
git.samba.org / sfrench / cifs-2.6.git / blobdiff