path: root/drivers/scsi/aic94xx/aic94xx_sds.c

/*
 * Aic94xx SAS/SATA driver access to shared data structures and memory
 * maps.
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * This file is part of the aic94xx driver.
 *
 * The aic94xx driver is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2 of the
 * License.
 *
 * The aic94xx driver is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the aic94xx driver; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/pci.h>
#include <linux/delay.h>

#include "aic94xx.h"
#include "aic94xx_reg.h"

/* ---------- OCM stuff ---------- */

struct asd_ocm_dir_ent {
	u8 type;
	u8 offs[3];
	u8 _r1;
	u8 size[3];
} __attribute__ ((packed));

struct asd_ocm_dir {
	char sig[2];
	u8   _r1[2];
	u8   major;          /* 0 */
	u8   minor;          /* 0 */
	u8   _r2;
	u8   num_de;
	struct asd_ocm_dir_ent entry[15];
} __attribute__ ((packed));

#define	OCM_DE_OCM_DIR			0x00
#define	OCM_DE_WIN_DRVR			0x01
#define	OCM_DE_BIOS_CHIM		0x02
#define	OCM_DE_RAID_ENGN		0x03
#define	OCM_DE_BIOS_INTL		0x04
#define	OCM_DE_BIOS_CHIM_OSM		0x05
#define	OCM_DE_BIOS_CHIM_DYNAMIC	0x06
#define	OCM_DE_ADDC2C_RES0		0x07
#define	OCM_DE_ADDC2C_RES1		0x08
#define	OCM_DE_ADDC2C_RES2		0x09
#define	OCM_DE_ADDC2C_RES3		0x0A

#define OCM_INIT_DIR_ENTRIES	5
/***************************************************************************
*  OCM dircetory default
***************************************************************************/
static struct asd_ocm_dir OCMDirInit =
{
	.sig = {0x4D, 0x4F},	/* signature */
	.num_de = OCM_INIT_DIR_ENTRIES,	/* no. of directory entries */
};

/***************************************************************************
*  OCM dircetory Entries default
***************************************************************************/
static struct asd_ocm_dir_ent OCMDirEntriesInit[OCM_INIT_DIR_ENTRIES] =
{
	{
		.type = (OCM_DE_ADDC2C_RES0),	/* Entry type  */
		.offs = {128},			/* Offset */
		.size = {0, 4},			/* size */
	},
	{
		.type = (OCM_DE_ADDC2C_RES1),	/* Entry type  */
		.offs = {128, 4},		/* Offset */
		.size = {0, 4},			/* size */
	},
	{
		.type = (OCM_DE_ADDC2C_RES2),	/* Entry type  */
		.offs = {128, 8},		/* Offset */
		.size = {0, 4},			/* size */
	},
	{
		.type = (OCM_DE_ADDC2C_RES3),	/* Entry type  */
		.offs = {128, 12},		/* Offset */
		.size = {0, 4},			/* size */
	},
	{
		.type = (OCM_DE_WIN_DRVR),	/* Entry type  */
		.offs = {128, 16},		/* Offset */
		.size = {128, 235, 1},		/* size */
	},
};

struct asd_bios_chim_struct {
	char sig[4];
	u8   major;          /* 1 */
	u8   minor;          /* 0 */
	u8   bios_major;
	u8   bios_minor;
	__le32  bios_build;
	u8   flags;
	u8   pci_slot;
	__le16  ue_num;
	__le16  ue_size;
	u8  _r[14];
	/* The unit element array is right here.
	 */
} __attribute__ ((packed));

/**
 * asd_read_ocm_seg - read an on chip memory (OCM) segment
 * @asd_ha: pointer to the host adapter structure
 * @buffer: where to write the read data
 * @offs: offset into OCM where to read from
 * @size: how many bytes to read
 *
 * Return the number of bytes not read. Return 0 on success.
 */
static int asd_read_ocm_seg(struct asd_ha_struct *asd_ha, void *buffer,
			    u32 offs, int size)
{
	u8 *p = buffer;
	if (unlikely(asd_ha->iospace))
		asd_read_reg_string(asd_ha, buffer, offs+OCM_BASE_ADDR, size);
	else {
		for ( ; size > 0; size--, offs++, p++)
			*p = asd_read_ocm_byte(asd_ha, offs);
	}
	return size;
}

static int asd_read_ocm_dir(struct asd_ha_struct *asd_ha,
			    struct asd_ocm_dir *dir, u32 offs)
{
	int err = asd_read_ocm_seg(asd_ha, dir, offs, sizeof(*dir));
	if (err) {