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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/misc/ibmasm/lowlevel.c
17296 views
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/*

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 * IBM ASM Service Processor Device Driver

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License as published by

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 * the Free Software Foundation; either version 2 of the License, or

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 * (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 * GNU General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

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 *

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 * Copyright (C) IBM Corporation, 2004

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 *

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 * Author: Max Asb�ck <[email protected]>

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 *

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 */

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#include "ibmasm.h"

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#include "lowlevel.h"

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#include "i2o.h"

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#include "dot_command.h"

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#include "remote.h"

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static struct i2o_header header = I2O_HEADER_TEMPLATE;

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int ibmasm_send_i2o_message(struct service_processor *sp)

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{

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	u32 mfa;

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	unsigned int command_size;

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	struct i2o_message *message;

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	struct command *command = sp->current_command;

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	mfa = get_mfa_inbound(sp->base_address);

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	if (!mfa)

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		return 1;

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	command_size = get_dot_command_size(command->buffer);

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	header.message_size = outgoing_message_size(command_size);

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	message = get_i2o_message(sp->base_address, mfa);

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	memcpy_toio(&message->header, &header, sizeof(struct i2o_header));

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	memcpy_toio(&message->data, command->buffer, command_size);

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	set_mfa_inbound(sp->base_address, mfa);

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	return 0;

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}

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irqreturn_t ibmasm_interrupt_handler(int irq, void * dev_id)

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{

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	u32	mfa;

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	struct service_processor *sp = (struct service_processor *)dev_id;

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	void __iomem *base_address = sp->base_address;

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	char tsbuf[32];

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	if (!sp_interrupt_pending(base_address))

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		return IRQ_NONE;

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	dbg("respond to interrupt at %s\n", get_timestamp(tsbuf));

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	if (mouse_interrupt_pending(sp)) {

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		ibmasm_handle_mouse_interrupt(sp);

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		clear_mouse_interrupt(sp);

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	}

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	mfa = get_mfa_outbound(base_address);

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	if (valid_mfa(mfa)) {

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		struct i2o_message *msg = get_i2o_message(base_address, mfa);

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		ibmasm_receive_message(sp, &msg->data, incoming_data_size(msg));

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	} else

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		dbg("didn't get a valid MFA\n");

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	set_mfa_outbound(base_address, mfa);

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	dbg("finished interrupt at   %s\n", get_timestamp(tsbuf));

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	return IRQ_HANDLED;

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}

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