1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * IBM ASM Service Processor Device Driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) IBM Corporation, 2004
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Author: Max Asböck <amax@us.ibm.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include "ibmasm.h"
11*4882a593Smuzhiyun #include "lowlevel.h"
12*4882a593Smuzhiyun #include "i2o.h"
13*4882a593Smuzhiyun #include "dot_command.h"
14*4882a593Smuzhiyun #include "remote.h"
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun static struct i2o_header header = I2O_HEADER_TEMPLATE;
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun
ibmasm_send_i2o_message(struct service_processor * sp)19*4882a593Smuzhiyun int ibmasm_send_i2o_message(struct service_processor *sp)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun u32 mfa;
22*4882a593Smuzhiyun unsigned int command_size;
23*4882a593Smuzhiyun struct i2o_message *message;
24*4882a593Smuzhiyun struct command *command = sp->current_command;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun mfa = get_mfa_inbound(sp->base_address);
27*4882a593Smuzhiyun if (!mfa)
28*4882a593Smuzhiyun return 1;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun command_size = get_dot_command_size(command->buffer);
31*4882a593Smuzhiyun header.message_size = outgoing_message_size(command_size);
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun message = get_i2o_message(sp->base_address, mfa);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun memcpy_toio(&message->header, &header, sizeof(struct i2o_header));
36*4882a593Smuzhiyun memcpy_toio(&message->data, command->buffer, command_size);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun set_mfa_inbound(sp->base_address, mfa);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun return 0;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
ibmasm_interrupt_handler(int irq,void * dev_id)43*4882a593Smuzhiyun irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun u32 mfa;
46*4882a593Smuzhiyun struct service_processor *sp = (struct service_processor *)dev_id;
47*4882a593Smuzhiyun void __iomem *base_address = sp->base_address;
48*4882a593Smuzhiyun char tsbuf[32];
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun if (!sp_interrupt_pending(base_address))
51*4882a593Smuzhiyun return IRQ_NONE;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun dbg("respond to interrupt at %s\n", get_timestamp(tsbuf));
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun if (mouse_interrupt_pending(sp)) {
56*4882a593Smuzhiyun ibmasm_handle_mouse_interrupt(sp);
57*4882a593Smuzhiyun clear_mouse_interrupt(sp);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun mfa = get_mfa_outbound(base_address);
61*4882a593Smuzhiyun if (valid_mfa(mfa)) {
62*4882a593Smuzhiyun struct i2o_message *msg = get_i2o_message(base_address, mfa);
63*4882a593Smuzhiyun ibmasm_receive_message(sp, &msg->data, incoming_data_size(msg));
64*4882a593Smuzhiyun } else
65*4882a593Smuzhiyun dbg("didn't get a valid MFA\n");
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun set_mfa_outbound(base_address, mfa);
68*4882a593Smuzhiyun dbg("finished interrupt at %s\n", get_timestamp(tsbuf));
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun return IRQ_HANDLED;
71*4882a593Smuzhiyun }
72