1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * IBM ASM Service Processor Device Driver
4 *
5 * Copyright (C) IBM Corporation, 2004
6 *
7 * Author: Max Asb��ck <amax@us.ibm.com>
8 */
9
10#include "ibmasm.h"
11#include "lowlevel.h"
12#include "i2o.h"
13#include "dot_command.h"
14#include "remote.h"
15
16static struct i2o_header header = I2O_HEADER_TEMPLATE;
17
18
19int ibmasm_send_i2o_message(struct service_processor *sp)
20{
21	u32 mfa;
22	unsigned int command_size;
23	struct i2o_message *message;
24	struct command *command = sp->current_command;
25
26	mfa = get_mfa_inbound(sp->base_address);
27	if (!mfa)
28		return 1;
29
30	command_size = get_dot_command_size(command->buffer);
31	header.message_size = outgoing_message_size(command_size);
32
33	message = get_i2o_message(sp->base_address, mfa);
34
35	memcpy_toio(&message->header, &header, sizeof(struct i2o_header));
36	memcpy_toio(&message->data, command->buffer, command_size);
37
38	set_mfa_inbound(sp->base_address, mfa);
39
40	return 0;
41}
42
43irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id)
44{
45	u32	mfa;
46	struct service_processor *sp = (struct service_processor *)dev_id;
47	void __iomem *base_address = sp->base_address;
48	char tsbuf[32];
49
50	if (!sp_interrupt_pending(base_address))
51		return IRQ_NONE;
52
53	dbg("respond to interrupt at %s\n", get_timestamp(tsbuf));
54
55	if (mouse_interrupt_pending(sp)) {
56		ibmasm_handle_mouse_interrupt(sp);
57		clear_mouse_interrupt(sp);
58	}
59
60	mfa = get_mfa_outbound(base_address);
61	if (valid_mfa(mfa)) {
62		struct i2o_message *msg = get_i2o_message(base_address, mfa);
63		ibmasm_receive_message(sp, &msg->data, incoming_data_size(msg));
64	} else
65		dbg("didn't get a valid MFA\n");
66
67	set_mfa_outbound(base_address, mfa);
68	dbg("finished interrupt at   %s\n", get_timestamp(tsbuf));
69
70	return IRQ_HANDLED;
71}
72