Ejemplos de iotlb_alloc_cr en C++ (Cpp)

Ejemplo n.º 1

Archivo: iommu.c Proyecto: XMoon/kernel

/**
 * load_iotlb_entry - Set an iommu tlb entry
 * @obj:	target iommu
 * @e:		an iommu tlb entry info
 **/
int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e)
{
	int i;
	int err = 0;
	struct iotlb_lock l;
	struct cr_regs *cr;

	if (!obj || !obj->nr_tlb_entries || !e)
		return -EINVAL;

	clk_enable(obj->clk);

	for (i = 0; i < obj->nr_tlb_entries; i++) {
		struct cr_regs tmp;

		iotlb_lock_get(obj, &l);
		l.vict = i;
		iotlb_lock_set(obj, &l);
		iotlb_read_cr(obj, &tmp);
		if (!iotlb_cr_valid(&tmp))
			break;
	}

	if (i == obj->nr_tlb_entries) {
		dev_dbg(obj->dev, "%s: full: no entry\n", __func__);
		err = -EBUSY;
		goto out;
	}

	cr = iotlb_alloc_cr(obj, e);
	if (IS_ERR(cr)) {
		clk_disable(obj->clk);
		return PTR_ERR(cr);
	}

	iotlb_load_cr(obj, cr);
	kfree(cr);

	/* increment victim for next tlb load */
	if (++l.vict == obj->nr_tlb_entries)
		l.vict = 0;
	iotlb_lock_set(obj, &l);
out:
	clk_disable(obj->clk);
	return err;
}

Ejemplo n.º 2

Archivo: iommu.c Proyecto: egonalter/R-Link_kernel

/**
 * load_iotlb_entry - Set an iommu tlb entry
 * @obj:	target iommu
 * @e:		an iommu tlb entry info
 **/
int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e)
{
	int i;
	int err = 0;
	struct iotlb_lock l;
	struct cr_regs *cr;

	if (!obj || !obj->nr_tlb_entries || !e)
		return -EINVAL;

	if (!cpu_is_omap44xx())
		clk_enable(obj->clk);

	iotlb_lock_get(obj, &l);
	if (l.base == obj->nr_tlb_entries) {
		dev_warn(obj->dev, "%s: preserve entries full\n", __func__);
		err = -EBUSY;
		goto out;
	}
	if (!e->prsvd) {
		for (i = l.base; i < obj->nr_tlb_entries; i++) {
			struct cr_regs tmp;

			iotlb_lock_get(obj, &l);
			l.vict = i;
			iotlb_lock_set(obj, &l);
			iotlb_read_cr(obj, &tmp);
			if (!iotlb_cr_valid(&tmp))
				break;
		}
		if (i == obj->nr_tlb_entries) {
			dev_dbg(obj->dev, "%s: full: no entry\n", __func__);
			err = -EBUSY;
			goto out;
		}
	} else {
		l.vict = l.base;
		iotlb_lock_set(obj, &l);
	}

	cr = iotlb_alloc_cr(obj, e);
	if (IS_ERR(cr)) {

		if (!cpu_is_omap44xx())
			clk_disable(obj->clk);
		return PTR_ERR(cr);
	}
	iotlb_load_cr(obj, cr);
	kfree(cr);

	/* Increment base number if preservation is set */
	if (e->prsvd)
		l.base++;
	/* increment victim for next tlb load */
	if (++l.vict == obj->nr_tlb_entries) {
		l.vict = l.base;
		goto out;
	}

	iotlb_lock_set(obj, &l);
out:
	if (!cpu_is_omap44xx())
		clk_disable(obj->clk);

	return err;
}