forked from Minki/linux
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>
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@ -33,6 +33,8 @@ static struct iommu_device omap3_devices[] = {
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.name = "isp",
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.nr_tlb_entries = 8,
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.clk_name = "cam_ick",
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.da_start = 0x0,
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.da_end = 0xFFFFF000,
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},
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},
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#if defined(CONFIG_MPU_BRIDGE_IOMMU)
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@ -43,6 +45,8 @@ static struct iommu_device omap3_devices[] = {
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.name = "iva2",
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.nr_tlb_entries = 32,
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.clk_name = "iva2_ck",
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.da_start = 0x11000000,
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.da_end = 0xFFFFF000,
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},
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},
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#endif
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@ -64,6 +68,8 @@ static struct iommu_device omap4_devices[] = {
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.name = "ducati",
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.nr_tlb_entries = 32,
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.clk_name = "ducati_ick",
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.da_start = 0x0,
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.da_end = 0xFFFFF000,
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},
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},
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#if defined(CONFIG_MPU_TESLA_IOMMU)
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@ -74,6 +80,8 @@ static struct iommu_device omap4_devices[] = {
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.name = "tesla",
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.nr_tlb_entries = 32,
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.clk_name = "tesla_ick",
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.da_start = 0x0,
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.da_end = 0xFFFFF000,
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},
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},
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#endif
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@ -50,6 +50,8 @@ struct iommu {
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int (*isr)(struct iommu *obj);
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void *ctx; /* iommu context: registres saved area */
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u32 da_start;
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u32 da_end;
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};
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struct cr_regs {
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@ -103,6 +105,8 @@ struct iommu_platform_data {
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const char *name;
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const char *clk_name;
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const int nr_tlb_entries;
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u32 da_start;
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u32 da_end;
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};
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#if defined(CONFIG_ARCH_OMAP1)
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@ -152,6 +156,7 @@ extern void flush_iotlb_all(struct iommu *obj);
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extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
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extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
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extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
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extern struct iommu *iommu_get(const char *name);
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extern void iommu_put(struct iommu *obj);
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@ -829,6 +829,28 @@ static int device_match_by_alias(struct device *dev, void *data)
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return strcmp(obj->name, name) == 0;
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}
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/**
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* iommu_set_da_range - Set a valid device address range
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* @obj: target iommu
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* @start Start of valid range
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* @end End of valid range
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**/
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int iommu_set_da_range(struct iommu *obj, u32 start, u32 end)
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{
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if (!obj)
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return -EFAULT;
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if (end < start || !PAGE_ALIGN(start | end))
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return -EINVAL;
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obj->da_start = start;
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obj->da_end = end;
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return 0;
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}
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EXPORT_SYMBOL_GPL(iommu_set_da_range);
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/**
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* iommu_get - Get iommu handler
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* @name: target iommu name
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@ -922,6 +944,8 @@ static int __devinit omap_iommu_probe(struct platform_device *pdev)
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obj->name = pdata->name;
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obj->dev = &pdev->dev;
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obj->ctx = (void *)obj + sizeof(*obj);
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obj->da_start = pdata->da_start;
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obj->da_end = pdata->da_end;
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mutex_init(&obj->iommu_lock);
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mutex_init(&obj->mmap_lock);
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@ -280,13 +280,14 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
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alignement = PAGE_SIZE;
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if (flags & IOVMF_DA_ANON) {
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/*
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* Reserve the first page for NULL
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*/
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start = PAGE_SIZE;
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start = obj->da_start;
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if (flags & IOVMF_LINEAR)
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alignement = iopgsz_max(bytes);
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start = roundup(start, alignement);
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} else if (start < obj->da_start || start > obj->da_end ||
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obj->da_end - start < bytes) {
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return ERR_PTR(-EINVAL);
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}
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tmp = NULL;
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@ -299,16 +300,16 @@ static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
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if (prev_end > start)
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break;
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if (start + bytes <= tmp->da_start)
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if (tmp->da_start > start && (tmp->da_start - start) >= bytes)
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goto found;
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if (flags & IOVMF_DA_ANON)
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if (tmp->da_end >= start && flags & IOVMF_DA_ANON)
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start = roundup(tmp->da_end + 1, alignement);
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prev_end = tmp->da_end;
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}
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if ((start >= prev_end) && (ULONG_MAX - start + 1 >= bytes))
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if ((start >= prev_end) && (obj->da_end - start >= bytes))
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goto found;
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dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n",
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