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 Asböck <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
16 static struct i2o_header header = I2O_HEADER_TEMPLATE;
17
18
ibmasm_send_i2o_message(struct service_processor * sp)19 int 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
ibmasm_interrupt_handler(int irq,void * dev_id)43 irqreturn_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