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 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 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