Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

drivers/misc/ibmasm/remote.c

@@ -0,0 +1,152 @@
+
+/*
+ * 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 Asb<73>ck <amax@us.ibm.com> 
+ *
+ */
+
+/* Remote mouse and keyboard event handling functions */
+
+#include "ibmasm.h"
+#include "remote.h"
+
+int ibmasm_init_remote_queue(struct service_processor *sp)
+{
+	struct remote_queue *q = &sp->remote_queue;
+
+	disable_mouse_interrupts(sp);
+
+	q->open = 0;
+	q->size = 0;
+
+	q->start = kmalloc(DRIVER_REMOTE_QUEUE_SIZE * sizeof(struct remote_event), GFP_KERNEL);
+        if (q->start == 0)
+                return -ENOMEM;
+
+	q->end = q->start + DRIVER_REMOTE_QUEUE_SIZE;
+	q->reader = q->start;
+	q->writer = q->start;
+	q->size = DRIVER_REMOTE_QUEUE_SIZE;
+	init_waitqueue_head(&q->wait);
+
+	return 0;
+}
+
+void ibmasm_free_remote_queue(struct service_processor *sp)
+{
+	kfree(sp->remote_queue.start);
+}
+
+void ibmasm_advance_reader(struct remote_queue *q, unsigned int n)
+{
+	q->reader += n;
+	if (q->reader >= q->end)
+		q->reader -= q->size;
+}
+
+size_t ibmasm_events_available(struct remote_queue *q)
+{
+	ssize_t diff = q->writer - q->reader;
+ 
+	return (diff >= 0) ? diff : q->end - q->reader;	
+}
+	
+
+static int space_free(struct remote_queue *q)
+{
+	if (q->reader == q->writer)
+		return q->size - 1;
+
+	return ( (q->reader + q->size - q->writer) % q->size ) - 1;
+}
+
+static void set_mouse_event(struct remote_input *input, struct mouse_event *mouse)
+{
+	static char last_buttons = 0;
+
+	mouse->x = input->data.mouse.x;
+	mouse->y = input->data.mouse.y;
+
+	if (input->mouse_buttons == REMOTE_MOUSE_DOUBLE_CLICK) {
+		mouse->buttons = REMOTE_MOUSE_DOUBLE_CLICK;
+		last_buttons = 0;
+		return;
+	}
+	mouse->transitions = last_buttons ^ input->mouse_buttons;
+	mouse->buttons = input->mouse_buttons;
+
+	last_buttons = input->mouse_buttons;
+}
+
+static void set_keyboard_event(struct remote_input *input, struct keyboard_event *keyboard)
+{
+	keyboard->key_code = input->data.keyboard.key_code;
+	keyboard->key_down = input->data.keyboard.key_down;
+}
+
+static int add_to_driver_queue(struct remote_queue *q, struct remote_input *input)
+{
+	struct remote_event *event = q->writer;
+
+	if (space_free(q) < 1) {
+		return 1;
+	}
+
+	switch(input->type) {
+	case (INPUT_TYPE_MOUSE):
+		event->type = INPUT_TYPE_MOUSE;
+		set_mouse_event(input, &event->data.mouse);
+		break;
+	case (INPUT_TYPE_KEYBOARD):
+		event->type = INPUT_TYPE_KEYBOARD;
+		set_keyboard_event(input, &event->data.keyboard);
+		break;
+	default:
+		return 0;
+	}
+	event->type = input->type;
+
+	q->writer++;
+	if (q->writer == q->end)
+		q->writer = q->start;
+
+	return 0;
+}
+	
+
+void ibmasm_handle_mouse_interrupt(struct service_processor *sp)
+{
+	unsigned long reader;
+	unsigned long writer;
+	struct remote_input input;
+
+	reader = get_queue_reader(sp);
+	writer = get_queue_writer(sp);
+
+	while (reader != writer) {
+		memcpy(&input, (void *)get_queue_entry(sp, reader), sizeof(struct remote_input));
+
+		if (add_to_driver_queue(&sp->remote_queue, &input))
+			break;
+
+		reader = advance_queue_reader(sp, reader);
+	}
+	wake_up_interruptible(&sp->remote_queue.wait);
+}