Exemple #1
0
static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs, int num)
{
	int i;
	struct iotlb_lock saved, l;
	struct cr_regs *p = crs;

	clk_enable(obj->clk);

	iotlb_lock_get(obj, &saved);
	memcpy(&l, &saved, sizeof(saved));

	for (i = 0; i < num; 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))
			continue;

		*p++ = tmp;
	}
	iotlb_lock_set(obj, &saved);
	clk_disable(obj->clk);

	return  p - crs;
}
Exemple #2
0
/**
 * flush_iotlb_page - Clear an iommu tlb entry
 * @obj:	target iommu
 * @da:		iommu device virtual address
 *
 * Clear an iommu tlb entry which includes 'da' address.
 **/
void flush_iotlb_page(struct iommu *obj, u32 da)
{
	struct iotlb_lock l;
	int i;

	clk_enable(obj->clk);

	for (i = 0; i < obj->nr_tlb_entries; i++) {
		struct cr_regs cr;
		u32 start;
		size_t bytes;

		iotlb_lock_get(obj, &l);
		l.vict = i;
		iotlb_lock_set(obj, &l);
		iotlb_read_cr(obj, &cr);
		if (!iotlb_cr_valid(&cr))
			continue;

		start = iotlb_cr_to_virt(&cr);
		bytes = iopgsz_to_bytes(cr.cam & 3);

		if ((start <= da) && (da < start + bytes)) {
			dev_dbg(obj->dev, "%s: %08x<=%08x(%x)\n",
				__func__, start, da, bytes);
			iotlb_load_cr(obj, &cr);
			iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY);
		}
	}
	clk_disable(obj->clk);

	if (i == obj->nr_tlb_entries)
		dev_dbg(obj->dev, "%s: no page for %08x\n", __func__, da);
}
Exemple #3
0
/**
 * 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;
}
Exemple #4
0
/* only used in iotlb iteration for-loop */
static struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n)
{
	struct cr_regs cr;
	struct iotlb_lock l;

	iotlb_lock_get(obj, &l);
	l.vict = n;
	iotlb_lock_set(obj, &l);
	iotlb_read_cr(obj, &cr);

	return cr;
}
Exemple #5
0
/**
 * flush_iotlb_all - Clear all iommu tlb entries
 * @obj:	target iommu
 **/
void flush_iotlb_all(struct iommu *obj)
{
	struct iotlb_lock l;

	clk_enable(obj->clk);

	l.base = 0;
	l.vict = 0;
	iotlb_lock_set(obj, &l);

	iommu_write_reg(obj, 1, MMU_GFLUSH);

	clk_disable(obj->clk);
}
static int
__dump_tlb_entries(struct omap_iommu *obj, struct cr_regs *crs, int num)
{
	int i;
	struct iotlb_lock saved;
	struct cr_regs tmp;
	struct cr_regs *p = crs;

	pm_runtime_get_sync(obj->dev);
	iotlb_lock_get(obj, &saved);

	for_each_iotlb_cr(obj, num, i, tmp) {
		if (!iotlb_cr_valid(&tmp))
			continue;
		*p++ = tmp;
	}

	iotlb_lock_set(obj, &saved);
	pm_runtime_put_sync(obj->dev);

	return  p - crs;
}
Exemple #7
0
/**
 * 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;
}