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OMAP: iommu: create new api to set valid da range 

Some IOMMUs cannot use the whole 0x0 - 0xFFFFFFFF range.
With this new API the valid range can be set.

Signed-off-by: Fernando Guzman Lugo <x0095840@ti.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
This commit is contained in:
Guzman Lugo, Fernando 2010-12-15 00:54:03 +00:00 committed by Hari Kanigeri
parent 9205a109fb
commit c7f4ab26e3
4 changed files with 45 additions and 7 deletions
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8
arch/arm/mach-omap2/omap-iommu.c
View File

@ -33,6 +33,8 @@ static struct iommu_device omap3_devices[] = {
.name = "isp",
.nr_tlb_entries = 8,
.clk_name = "cam_ick",
.da_start = 0x0,
.da_end = 0xFFFFF000,
},
},
#if defined(CONFIG_MPU_BRIDGE_IOMMU)
@ -43,6 +45,8 @@ static struct iommu_device omap3_devices[] = {
.name = "iva2",
.nr_tlb_entries = 32,
.clk_name = "iva2_ck",
.da_start = 0x11000000,
.da_end = 0xFFFFF000,
},
},
#endif
@ -64,6 +68,8 @@ static struct iommu_device omap4_devices[] = {
.name = "ducati",
.nr_tlb_entries = 32,
.clk_name = "ducati_ick",
.da_start = 0x0,
.da_end = 0xFFFFF000,
},
},
#if defined(CONFIG_MPU_TESLA_IOMMU)
@ -74,6 +80,8 @@ static struct iommu_device omap4_devices[] = {
.name = "tesla",
.nr_tlb_entries = 32,
.clk_name = "tesla_ick",
.da_start = 0x0,
.da_end = 0xFFFFF000,
},
},
#endif

5
arch/arm/plat-omap/include/plat/iommu.h
View File

@ -50,6 +50,8 @@ struct iommu {
int (*isr)(struct iommu *obj);
void *ctx; /* iommu context: registres saved area */
u32 da_start;
u32 da_end;
};
struct cr_regs {
@ -103,6 +105,8 @@ struct iommu_platform_data {
const char *name;
const char *clk_name;
const int nr_tlb_entries;
u32 da_start;
u32 da_end;
};
#if defined(CONFIG_ARCH_OMAP1)
@ -152,6 +156,7 @@ extern void flush_iotlb_all(struct iommu *obj);
extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
extern struct iommu *iommu_get(const char *name);
extern void iommu_put(struct iommu *obj);

24
arch/arm/plat-omap/iommu.c
View File

@ -829,6 +829,28 @@ static int device_match_by_alias(struct device *dev, void *data)
return strcmp(obj->name, name) == 0;
}
/**
* iommu_set_da_range - Set a valid device address range
* @obj: target iommu
* @start Start of valid range
* @end End of valid range
**/
int iommu_set_da_range(struct iommu *obj, u32 start, u32 end)
{
if (!obj)
return -EFAULT;
if (end < start || !PAGE_ALIGN(start | end))
return -EINVAL;
obj->da_start = start;
obj->da_end = end;
return 0;
}
EXPORT_SYMBOL_GPL(iommu_set_da_range);
/**
* iommu_get - Get iommu handler
* @name: target iommu name
@ -922,6 +944,8 @@ static int __devinit omap_iommu_probe(struct platform_device *pdev)
obj->name = pdata->name;
obj->dev = &pdev->dev;
obj->ctx = (void *)obj + sizeof(*obj);
obj->da_start = pdata->da_start;
obj->da_end = pdata->da_end;
mutex_init(&obj->iommu_lock);
mutex_init(&obj->mmap_lock);

15
arch/arm/plat-omap/iovmm.c
View File

@ -280,13 +280,14 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
alignement = PAGE_SIZE;
if (flags & IOVMF_DA_ANON) {
/*
* Reserve the first page for NULL
*/
start = PAGE_SIZE;
start = obj->da_start;
if (flags & IOVMF_LINEAR)
alignement = iopgsz_max(bytes);
start = roundup(start, alignement);
} else if (start < obj->da_start || start > obj->da_end ||
obj->da_end - start < bytes) {
return ERR_PTR(-EINVAL);
}
tmp = NULL;
@ -299,16 +300,16 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
if (prev_end > start)
break;
if (start + bytes <= tmp->da_start)
if (tmp->da_start > start && (tmp->da_start - start) >= bytes)
goto found;
if (flags & IOVMF_DA_ANON)
if (tmp->da_end >= start && flags & IOVMF_DA_ANON)
start = roundup(tmp->da_end + 1, alignement);
prev_end = tmp->da_end;
}
if ((start >= prev_end) && (ULONG_MAX - start + 1 >= bytes))
if ((start >= prev_end) && (obj->da_end - start >= bytes))
goto found;
dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n",