LXR linux/drivers/misc/ibmasm/lowlevel.c

   1/*
   2 * IBM ASM Service Processor Device Driver
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 *
  18 * Copyright (C) IBM Corporation, 2004
  19 *
  20 * Author: Max Asböck <amax@us.ibm.com>
  21 *
  22 */
  23
  24#include "ibmasm.h"
  25#include "lowlevel.h"
  26#include "i2o.h"
  27#include "dot_command.h"
  28#include "remote.h"
  29
  30static struct i2o_header header = I2O_HEADER_TEMPLATE;
  31
  32
  33int ibmasm_send_i2o_message(struct service_processor *sp)
  34{
  35        u32 mfa;
  36        unsigned int command_size;
  37        struct i2o_message *message;
  38        struct command *command = sp->current_command;
  39
  40        mfa = get_mfa_inbound(sp->base_address);
  41        if (!mfa)
  42                return 1;
  43
  44        command_size = get_dot_command_size(command->buffer);
  45        header.message_size = outgoing_message_size(command_size);
  46
  47        message = get_i2o_message(sp->base_address, mfa);
  48
  49        memcpy_toio(&message->header, &header, sizeof(struct i2o_header));
  50        memcpy_toio(&message->data, command->buffer, command_size);
  51
  52        set_mfa_inbound(sp->base_address, mfa);
  53
  54        return 0;
  55}
  56
  57irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id)
  58{
  59        u32     mfa;
  60        struct service_processor *sp = (struct service_processor *)dev_id;
  61        void __iomem *base_address = sp->base_address;
  62        char tsbuf[32];
  63
  64        if (!sp_interrupt_pending(base_address))
  65                return IRQ_NONE;
  66
  67        dbg("respond to interrupt at %s\n", get_timestamp(tsbuf));
  68
  69        if (mouse_interrupt_pending(sp)) {
  70                ibmasm_handle_mouse_interrupt(sp);
  71                clear_mouse_interrupt(sp);
  72        }
  73
  74        mfa = get_mfa_outbound(base_address);
  75        if (valid_mfa(mfa)) {
  76                struct i2o_message *msg = get_i2o_message(base_address, mfa);
  77                ibmasm_receive_message(sp, &msg->data, incoming_data_size(msg));
  78        } else
  79                dbg("didn't get a valid MFA\n");
  80
  81        set_mfa_outbound(base_address, mfa);
  82        dbg("finished interrupt at   %s\n", get_timestamp(tsbuf));
  83
  84        return IRQ_HANDLED;
  85}
  86