C++ (Cpp) flush_iotlb_all Examples

Example #1

File: iommu.c Project: XMoon/kernel

static void iopgtable_clear_entry_all(struct iommu *obj)
{
	int i;

	spin_lock(&obj->page_table_lock);

	for (i = 0; i < PTRS_PER_IOPGD; i++) {
		u32 da;
		u32 *iopgd;

		da = i << IOPGD_SHIFT;
		iopgd = iopgd_offset(obj, da);

		if (!*iopgd)
			continue;

		if (*iopgd & IOPGD_TABLE)
			iopte_free(iopte_offset(iopgd, 0));

		*iopgd = 0;
		flush_iopgd_range(iopgd, iopgd);
	}

	flush_iotlb_all(obj);

	spin_unlock(&obj->page_table_lock);
}

Example #2

File: iommu.c Project: egonalter/R-Link_kernel

/**
 * iommu_get - Get iommu handler
 * @name:	target iommu name
 **/
struct iommu *iommu_get(const char *name)
{
	int err = -ENOMEM;
	struct device *dev;
	struct iommu *obj;
	int rev;

	dev = driver_find_device(&omap_iommu_driver.driver, NULL, (void *)name,
				 device_match_by_alias);
	if (!dev)
		return ERR_PTR(-ENODEV);

	obj = to_iommu(dev);

	mutex_lock(&obj->iommu_lock);

	if (obj->refcount++ == 0) {
		err = iommu_enable(obj);
		if (err)
			goto err_enable;
		if (!strcmp(obj->name, "ducati")) {
			rev = GET_OMAP_REVISION();
			if (rev == 0x0)
				iommu_set_twl(obj, false);
		}

		flush_iotlb_all(obj);
	}

	if (!try_module_get(obj->owner))
		goto err_module;
	mutex_unlock(&obj->iommu_lock);

	dev_dbg(obj->dev, "%s: %s\n", __func__, obj->name);
	return obj;

err_module:
	if (obj->refcount == 1)
		iommu_disable(obj);
err_enable:
	obj->refcount--;
	mutex_unlock(&obj->iommu_lock);
	return ERR_PTR(err);
}