path: root/drivers/iommu/fsl_pamu.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (C) 2013 Freescale Semiconductor, Inc.
 *
 */

#define pr_fmt(fmt)    "fsl-pamu: %s: " fmt, __func__

#include <linux/init.h>
#include <linux/iommu.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/of_platform.h>
#include <linux/bootmem.h>
#include <linux/genalloc.h>
#include <asm/io.h>
#include <asm/bitops.h>
#include <asm/fsl_guts.h>

#include "fsl_pamu.h"

/* define indexes for each operation mapping scenario */
#define OMI_QMAN        0x00
#define OMI_FMAN        0x01
#define OMI_QMAN_PRIV   0x02
#define OMI_CAAM        0x03

#define make64(high, low) (((u64)(high) << 32) | (low))

struct pamu_isr_data {
	void __iomem *pamu_reg_base;	/* Base address of PAMU regs*/
	unsigned int count;		/* The number of PAMUs */
};

static struct paace *ppaact;
static struct paace *spaact;
static struct ome *omt;

/*
 * Table for matching compatible strings, for device tree
 * guts node, for QorIQ SOCs.
 * "fsl,qoriq-device-config-2.0" corresponds to T4 & B4
 * SOCs. For the older SOCs "fsl,qoriq-device-config-1.0"
 * string would be used.
*/
static const struct of_device_id guts_device_ids[] = {
	{ .compatible = "fsl,qoriq-device-config-1.0", },
	{ .compatible = "fsl,qoriq-device-config-2.0", },
	{}
};


/*
 * Table for matching compatible strings, for device tree
 * L3 cache controller node.
 * "fsl,t4240-l3-cache-controller" corresponds to T4,
 * "fsl,b4860-l3-cache-controller" corresponds to B4 &
 * "fsl,p4080-l3-cache-controller" corresponds to other,
 * SOCs.
*/
static const struct of_device_id l3_device_ids[] = {
	{ .compatible = "fsl,t4240-l3-cache-controller", },
	{ .compatible = "fsl,b4860-l3-cache-controller", },
	{ .compatible = "fsl,p4080-l3-cache-controller", },
	{}
};

/* maximum subwindows permitted per liodn */
static u32 max_subwindow_count;

/* Pool for fspi allocation */
struct gen_pool *spaace_pool;

/**
 * pamu_get_max_subwin_cnt() - Return the maximum supported
 * subwindow count per liodn.
 *
 */
u32 pamu_get_max_subwin_cnt()
{
	return max_subwindow_count;
}

/**
 * pamu_get_ppaace() - Return the primary PACCE
 * @liodn: liodn PAACT index for desired PAACE
 *
 * Returns the ppace pointer upon success else return
 * null.
 */
static struct paace *pamu_get_ppaace(int liodn)
{
	if (!ppaact || liodn >= PAACE_NUMBER_ENTRIES) {
		pr_debug("PPAACT doesn't exist\n");
		return NULL;
	}

	return &ppaact[liodn];
}

/**
 * pamu_enable_liodn() - Set valid bit of PACCE
 * @liodn: liodn PAACT index for desired PAACE
 *
 * Returns 0 upon success else error code < 0 returned
 */
int pamu_enable_liodn(int liodn)
{
	struct paace *ppaace;

	ppaace = pamu_get_ppaace(liodn);
	if (!ppaace) {
		pr_debug("Invalid primary paace entry\n");
		return -ENOENT;
	}

	if