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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/misc/ibmasm/event.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/ibmasm/event.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/misc/ibmasm/event.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/ibmasm/event.c b/ANDROID_3.4.5/drivers/misc/ibmasm/event.c deleted file mode 100644 index 8e540f4e..00000000 --- a/ANDROID_3.4.5/drivers/misc/ibmasm/event.c +++ /dev/null @@ -1,177 +0,0 @@ - -/* - * IBM ASM Service Processor Device Driver - * - * 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. - * - * Copyright (C) IBM Corporation, 2004 - * - * Author: Max Asböck <amax@us.ibm.com> - * - */ - -#include <linux/sched.h> -#include <linux/slab.h> -#include "ibmasm.h" -#include "lowlevel.h" - -/* - * ASM service processor event handling routines. - * - * Events are signalled to the device drivers through interrupts. - * They have the format of dot commands, with the type field set to - * sp_event. - * The driver does not interpret the events, it simply stores them in a - * circular buffer. - */ - -static void wake_up_event_readers(struct service_processor *sp) -{ - struct event_reader *reader; - - list_for_each_entry(reader, &sp->event_buffer->readers, node) - wake_up_interruptible(&reader->wait); -} - -/** - * receive_event - * Called by the interrupt handler when a dot command of type sp_event is - * received. - * Store the event in the circular event buffer, wake up any sleeping - * event readers. - * There is no reader marker in the buffer, therefore readers are - * responsible for keeping up with the writer, or they will lose events. - */ -void ibmasm_receive_event(struct service_processor *sp, void *data, unsigned int data_size) -{ - struct event_buffer *buffer = sp->event_buffer; - struct ibmasm_event *event; - unsigned long flags; - - data_size = min(data_size, IBMASM_EVENT_MAX_SIZE); - - spin_lock_irqsave(&sp->lock, flags); - /* copy the event into the next slot in the circular buffer */ - event = &buffer->events[buffer->next_index]; - memcpy_fromio(event->data, data, data_size); - event->data_size = data_size; - event->serial_number = buffer->next_serial_number; - - /* advance indices in the buffer */ - buffer->next_index = (buffer->next_index + 1) % IBMASM_NUM_EVENTS; - buffer->next_serial_number++; - spin_unlock_irqrestore(&sp->lock, flags); - - wake_up_event_readers(sp); -} - -static inline int event_available(struct event_buffer *b, struct event_reader *r) -{ - return (r->next_serial_number < b->next_serial_number); -} - -/** - * get_next_event - * Called by event readers (initiated from user space through the file - * system). - * Sleeps until a new event is available. - */ -int ibmasm_get_next_event(struct service_processor *sp, struct event_reader *reader) -{ - struct event_buffer *buffer = sp->event_buffer; - struct ibmasm_event *event; - unsigned int index; - unsigned long flags; - - reader->cancelled = 0; - - if (wait_event_interruptible(reader->wait, - event_available(buffer, reader) || reader->cancelled)) - return -ERESTARTSYS; - - if (!event_available(buffer, reader)) - return 0; - - spin_lock_irqsave(&sp->lock, flags); - - index = buffer->next_index; - event = &buffer->events[index]; - while (event->serial_number < reader->next_serial_number) { - index = (index + 1) % IBMASM_NUM_EVENTS; - event = &buffer->events[index]; - } - memcpy(reader->data, event->data, event->data_size); - reader->data_size = event->data_size; - reader->next_serial_number = event->serial_number + 1; - - spin_unlock_irqrestore(&sp->lock, flags); - - return event->data_size; -} - -void ibmasm_cancel_next_event(struct event_reader *reader) -{ - reader->cancelled = 1; - wake_up_interruptible(&reader->wait); -} - -void ibmasm_event_reader_register(struct service_processor *sp, struct event_reader *reader) -{ - unsigned long flags; - - reader->next_serial_number = sp->event_buffer->next_serial_number; - init_waitqueue_head(&reader->wait); - spin_lock_irqsave(&sp->lock, flags); - list_add(&reader->node, &sp->event_buffer->readers); - spin_unlock_irqrestore(&sp->lock, flags); -} - -void ibmasm_event_reader_unregister(struct service_processor *sp, struct event_reader *reader) -{ - unsigned long flags; - - spin_lock_irqsave(&sp->lock, flags); - list_del(&reader->node); - spin_unlock_irqrestore(&sp->lock, flags); -} - -int ibmasm_event_buffer_init(struct service_processor *sp) -{ - struct event_buffer *buffer; - struct ibmasm_event *event; - int i; - - buffer = kmalloc(sizeof(struct event_buffer), GFP_KERNEL); - if (!buffer) - return 1; - - buffer->next_index = 0; - buffer->next_serial_number = 1; - - event = buffer->events; - for (i=0; i<IBMASM_NUM_EVENTS; i++, event++) - event->serial_number = 0; - - INIT_LIST_HEAD(&buffer->readers); - - sp->event_buffer = buffer; - - return 0; -} - -void ibmasm_event_buffer_exit(struct service_processor *sp) -{ - kfree(sp->event_buffer); -} |