Re: [PATCH v3] omap3-iommu: reorganize
From: Felipe Contreras
Date: Thu Nov 12 2009 - 16:00:26 EST
On Thu, Nov 12, 2009 at 10:52 PM, Felipe Contreras
<felipe.contreras@xxxxxxxxx> wrote:
> This is the third version of my attempt to reorganize the omap3 iommu code to
> make it easier to read and more extensible. I've taken into consideration
> Russell and Hiroshi's comments. Also, rebased on top of Tony's 'for-next'
> branch, although no changes have been done since v2.
>
> I'm resending because Tony asked me to.
Last comments from Hiroshi were not so positive, so I'm attaching a
dummy omap4-iommu.c with 4 devices in order to show that the new
format is actually more extensible (the 2 formats are shown).
Cheers.
--
Felipe Contreras
/*
* omap iommu: omap4 device registration
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Written by Hari Kanigeri <h-kanigeri2@xxxxxx>
*
* Added support for OMAP4. This is based on original file
* omap3-iommu.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.
*/
#include <linux/platform_device.h>
#include <mach/iommu.h>
#include <mach/irqs.h>
#define OMAP4_MMU1_BASE 0x55082000
#define OMAP4_MMU2_BASE 0x4A066000
#define OMAP4_MMU3_BASE 0x00000000
#define OMAP4_MMU4_BASE 0x00000000
#define OMAP4_MMU1_IRQ INT_44XX_DUCATI_MMU_IRQ
#define OMAP4_MMU2_IRQ INT_44XX_DSP_MMU
#define OMAP4_MMU3_IRQ 0
#define OMAP4_MMU4_IRQ 0
static unsigned long iommu_base[] __initdata = {
OMAP4_MMU1_BASE,
OMAP4_MMU2_BASE,
OMAP4_MMU3_BASE,
OMAP4_MMU4_BASE,
};
static int iommu_irq[] __initdata = {
OMAP4_MMU1_IRQ,
OMAP4_MMU2_IRQ,
OMAP4_MMU3_IRQ,
};
static const struct iommu_platform_data omap4_iommu_pdata[] __initconst = {
{
.name = "ducati",
.nr_tlb_entries = 32,
},
{
.name = "isp",
.nr_tlb_entries = 8,
},
{
.name = "foobar",
.nr_tlb_entries = 8,
},
#if defined(CONFIG_MPU_TESLA_IOMMU)
{
.name = "tesla",
.nr_tlb_entries = 32,
},
#endif
};
#define NR_IOMMU_DEVICES ARRAY_SIZE(omap4_iommu_pdata)
static struct platform_device *omap4_iommu_pdev[NR_IOMMU_DEVICES];
static int __init omap4_iommu_init(void)
{
int i, err;
for (i = 0; i < NR_IOMMU_DEVICES; i++) {
struct platform_device *pdev;
struct resource res[2];
pdev = platform_device_alloc("omap-iommu", i);
if (!pdev) {
err = -ENOMEM;
goto err_out;
}
memset(res, 0, sizeof(res));
res[0].start = iommu_base[i];
res[0].end = iommu_base[i] + MMU_REG_SIZE - 1;
res[0].flags = IORESOURCE_MEM;
res[1].start = res[1].end = iommu_irq[i];
res[1].flags = IORESOURCE_IRQ;
err = platform_device_add_resources(pdev, res,
ARRAY_SIZE(res));
if (err)
goto err_out;
err = platform_device_add_data(pdev, &omap4_iommu_pdata[i],
sizeof(omap4_iommu_pdata[0]));
if (err)
goto err_out;
err = platform_device_add(pdev);
if (err)
goto err_out;
omap4_iommu_pdev[i] = pdev;
}
return 0;
err_out:
while (i--)
platform_device_put(omap4_iommu_pdev[i]);
return err;
}
module_init(omap4_iommu_init);
static void __exit omap4_iommu_exit(void)
{
int i;
for (i = 0; i < NR_IOMMU_DEVICES; i++)
platform_device_unregister(omap4_iommu_pdev[i]);
}
module_exit(omap4_iommu_exit);
MODULE_AUTHOR("Hiroshi DOYU, Hari Kanigeri");
MODULE_DESCRIPTION("omap iommu: omap4 device registration");
MODULE_LICENSE("GPL v2");
/*
* omap iommu: omap4 device registration
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Written by Hari Kanigeri <h-kanigeri2@xxxxxx>
*
* Added support for OMAP4. This is based on original file
* omap3-iommu.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.
*/
#include <linux/platform_device.h>
#include <mach/iommu.h>
#include <mach/irqs.h>
struct iommu_device {
resource_size_t base;
int irq;
struct iommu_platform_data pdata;
struct resource res[2];
};
static struct iommu_device devices[] = {
{
.base = 0x55082000,
.irq = INT_44XX_DUCATI_MMU_IRQ,
.pdata = {
.name = "ducati",
.nr_tlb_entries = 32,
},
},
{
.base = 0x00000000,
.irq = 0,
.pdata = {
.name = "isp",
.nr_tlb_entries = 8,
},
},
{
.base = 0x00000000,
.irq = 0,
.pdata = {
.name = "foobar",
.nr_tlb_entries = 8,
},
},
#if defined(CONFIG_MPU_TESLA_IOMMU)
{
.base = 0x4A066000,
.irq = INT_44XX_DSP_MMU,
.pdata = {
.name = "tesla",
.nr_tlb_entries = 32,
},
},
#endif
};
#define NR_IOMMU_DEVICES ARRAY_SIZE(devices)
static struct platform_device *omap4_iommu_pdev[NR_IOMMU_DEVICES];
static int __init omap4_iommu_init(void)
{
int i, err;
struct resource res[] = {
{ .flags = IORESOURCE_MEM },
{ .flags = IORESOURCE_IRQ },
};
for (i = 0; i < NR_IOMMU_DEVICES; i++) {
struct platform_device *pdev;
const struct iommu_device *d = &devices[i];
pdev = platform_device_alloc("omap-iommu", i);
if (!pdev) {
err = -ENOMEM;
goto err_out;
}
res[0].start = d->base;
res[0].end = d->base + MMU_REG_SIZE - 1;
res[1].start = res[1].end = d->irq;
err = platform_device_add_resources(pdev, res,
ARRAY_SIZE(res));
if (err)
goto err_out;
err = platform_device_add_data(pdev, &d->pdata,
sizeof(d->pdata));
if (err)
goto err_out;
err = platform_device_add(pdev);
if (err)
goto err_out;
omap4_iommu_pdev[i] = pdev;
}
return 0;
err_out:
while (i--)
platform_device_put(omap4_iommu_pdev[i]);
return err;
}
module_init(omap4_iommu_init);
static void __exit omap4_iommu_exit(void)
{
int i;
for (i = 0; i < NR_IOMMU_DEVICES; i++)
platform_device_unregister(omap4_iommu_pdev[i]);
}
module_exit(omap4_iommu_exit);
MODULE_AUTHOR("Hiroshi DOYU, Hari Kanigeri");
MODULE_DESCRIPTION("omap iommu: omap4 device registration");
MODULE_LICENSE("GPL v2");