Beispiel #1
0
static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
{
	struct device_node *dn;
	unsigned long drc_index;
	char *cpu_name;
	int rc;

	cpu_hotplug_driver_lock();
	rc = strict_strtoul(buf, 0, &drc_index);
	if (rc) {
		rc = -EINVAL;
		goto out;
	}

	dn = dlpar_configure_connector(drc_index);
	if (!dn) {
		rc = -EINVAL;
		goto out;
	}

	/* configure-connector reports cpus as living in the base
	 * directory of the device tree.  CPUs actually live in the
	 * cpus directory so we need to fixup the full_name.
	 */
	cpu_name = kzalloc(strlen(dn->full_name) + strlen("/cpus") + 1,
			   GFP_KERNEL);
	if (!cpu_name) {
		dlpar_free_cc_nodes(dn);
		rc = -ENOMEM;
		goto out;
	}

	sprintf(cpu_name, "/cpus%s", dn->full_name);
	kfree(dn->full_name);
	dn->full_name = cpu_name;

	rc = dlpar_acquire_drc(drc_index);
	if (rc) {
		dlpar_free_cc_nodes(dn);
		rc = -EINVAL;
		goto out;
	}

	rc = dlpar_attach_node(dn);
	if (rc) {
		dlpar_release_drc(drc_index);
		dlpar_free_cc_nodes(dn);
	}

	rc = dlpar_online_cpu(dn);
out:
	cpu_hotplug_driver_unlock();

	return rc ? rc : count;
}
Beispiel #2
0
static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
{
	struct device_node *dn, *parent;
	unsigned long drc_index;
	int rc;

	cpu_hotplug_driver_lock();
	rc = strict_strtoul(buf, 0, &drc_index);
	if (rc) {
		rc = -EINVAL;
		goto out;
	}

	parent = of_find_node_by_path("/cpus");
	if (!parent) {
		rc = -ENODEV;
		goto out;
	}

	dn = dlpar_configure_connector(drc_index, parent);
	if (!dn) {
		rc = -EINVAL;
		goto out;
	}

	of_node_put(parent);

	rc = dlpar_acquire_drc(drc_index);
	if (rc) {
		dlpar_free_cc_nodes(dn);
		rc = -EINVAL;
		goto out;
	}

	rc = dlpar_attach_node(dn);
	if (rc) {
		dlpar_release_drc(drc_index);
		dlpar_free_cc_nodes(dn);
		goto out;
	}

	rc = dlpar_online_cpu(dn);
out:
	cpu_hotplug_driver_unlock();

	return rc ? rc : count;
}
Beispiel #3
0
static u32 lookup_lmb_associativity_index(struct of_drconf_cell *lmb)
{
	struct device_node *parent, *lmb_node, *dr_node;
	struct property *ala_prop;
	const u32 *lmb_assoc;
	u32 aa_index;

	parent = of_find_node_by_path("/");
	if (!parent)
		return -ENODEV;

	lmb_node = dlpar_configure_connector(cpu_to_be32(lmb->drc_index),
					     parent);
	of_node_put(parent);
	if (!lmb_node)
		return -EINVAL;

	lmb_assoc = of_get_property(lmb_node, "ibm,associativity", NULL);
	if (!lmb_assoc) {
		dlpar_free_cc_nodes(lmb_node);
		return -ENODEV;
	}

	dr_node = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
	if (!dr_node) {
		dlpar_free_cc_nodes(lmb_node);
		return -ENODEV;
	}

	ala_prop = of_find_property(dr_node, "ibm,associativity-lookup-arrays",
				    NULL);
	if (!ala_prop) {
		of_node_put(dr_node);
		dlpar_free_cc_nodes(lmb_node);
		return -ENODEV;
	}

	aa_index = find_aa_index(dr_node, ala_prop, lmb_assoc);

	dlpar_free_cc_nodes(lmb_node);
	return aa_index;
}
Beispiel #4
0
static int add_dt_node(u32 parent_phandle, u32 drc_index)
{
	struct device_node *dn;
	struct device_node *parent_dn;
	int rc;

	parent_dn = of_find_node_by_phandle(parent_phandle);
	if (!parent_dn)
		return -ENOENT;

	dn = dlpar_configure_connector(drc_index, parent_dn);
	if (!dn)
		return -ENOENT;

	rc = dlpar_attach_node(dn);
	if (rc)
		dlpar_free_cc_nodes(dn);

	of_node_put(parent_dn);
	return rc;
}
Beispiel #5
0
static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
{
	struct device_node *dn, *parent;
	u32 drc_index;
	int rc;

	rc = kstrtou32(buf, 0, &drc_index);
	if (rc)
		return -EINVAL;

	parent = of_find_node_by_path("/cpus");
	if (!parent)
		return -ENODEV;

	dn = dlpar_configure_connector(cpu_to_be32(drc_index), parent);
	if (!dn)
		return -EINVAL;

	of_node_put(parent);

	rc = dlpar_acquire_drc(drc_index);
	if (rc) {
		dlpar_free_cc_nodes(dn);
		return -EINVAL;
	}

	rc = dlpar_attach_node(dn);
	if (rc) {
		dlpar_release_drc(drc_index);
		dlpar_free_cc_nodes(dn);
		return rc;
	}

	rc = dlpar_online_cpu(dn);
	if (rc)
		return rc;

	return count;
}
Beispiel #6
0
static u32 lookup_lmb_associativity_index(struct of_drconf_cell *lmb)
{
	struct device_node *parent, *lmb_node, *dr_node;
	const u32 *lmb_assoc;
	const u32 *assoc_arrays;
	u32 aa_index;
	int aa_arrays, aa_array_entries, aa_array_sz;
	int i;

	parent = of_find_node_by_path("/");
	if (!parent)
		return -ENODEV;

	lmb_node = dlpar_configure_connector(cpu_to_be32(lmb->drc_index),
					     parent);
	of_node_put(parent);
	if (!lmb_node)
		return -EINVAL;

	lmb_assoc = of_get_property(lmb_node, "ibm,associativity", NULL);
	if (!lmb_assoc) {
		dlpar_free_cc_nodes(lmb_node);
		return -ENODEV;
	}

	dr_node = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
	if (!dr_node) {
		dlpar_free_cc_nodes(lmb_node);
		return -ENODEV;
	}

	assoc_arrays = of_get_property(dr_node,
				       "ibm,associativity-lookup-arrays",
				       NULL);
	of_node_put(dr_node);
	if (!assoc_arrays) {
		dlpar_free_cc_nodes(lmb_node);
		return -ENODEV;
	}

	/* The ibm,associativity-lookup-arrays property is defined to be
	 * a 32-bit value specifying the number of associativity arrays
	 * followed by a 32-bitvalue specifying the number of entries per
	 * array, followed by the associativity arrays.
	 */
	aa_arrays = be32_to_cpu(assoc_arrays[0]);
	aa_array_entries = be32_to_cpu(assoc_arrays[1]);
	aa_array_sz = aa_array_entries * sizeof(u32);

	aa_index = -1;
	for (i = 0; i < aa_arrays; i++) {
		int indx = (i * aa_array_entries) + 2;

		if (memcmp(&assoc_arrays[indx], &lmb_assoc[1], aa_array_sz))
			continue;

		aa_index = i;
		break;
	}

	dlpar_free_cc_nodes(lmb_node);
	return aa_index;
}