1 // SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt)     "pseries-pmem: " fmt
32 	int rc;  in pmem_drc_add_node()  local
34 	pr_debug("Attempting to add pmem node, drc index: %x\n", drc_index);  in pmem_drc_add_node()
36 	rc = dlpar_acquire_drc(drc_index);  in pmem_drc_add_node()
37 	if (rc) {  in pmem_drc_add_node()
38 		pr_err("Failed to acquire DRC, rc: %d, drc index: %x\n",  in pmem_drc_add_node()
39 			rc, drc_index);  in pmem_drc_add_node()
40 		return -EINVAL;  in pmem_drc_add_node()
45 		pr_err("configure-connector failed for drc %x\n", drc_index);  in pmem_drc_add_node()
47 		return -EINVAL;  in pmem_drc_add_node()
51 	rc = dlpar_attach_node(dn, pmem_node);  in pmem_drc_add_node()
52 	if (rc) {  in pmem_drc_add_node()
53 		pr_err("Failed to attach node %pOF, rc: %d, drc index: %x\n",  in pmem_drc_add_node()
54 			dn, rc, drc_index);  in pmem_drc_add_node()
59 		return rc;  in pmem_drc_add_node()
62 	pr_info("Successfully added %pOF, drc index: %x\n", dn, drc_index);  in pmem_drc_add_node()
71 	int rc;  in pmem_drc_remove_node()  local
74 		if (of_property_read_u32(dn, "ibm,my-drc-index", &index))  in pmem_drc_remove_node()
81 		pr_err("Attempting to remove unused DRC index %x\n", drc_index);  in pmem_drc_remove_node()
82 		return -ENODEV;  in pmem_drc_remove_node()
85 	pr_debug("Attempting to remove %pOF, drc index: %x\n", dn, drc_index);  in pmem_drc_remove_node()
87 	/* * NB: tears down the ibm,pmemory device as a side-effect */  in pmem_drc_remove_node()
88 	rc = dlpar_detach_node(dn);  in pmem_drc_remove_node()
89 	if (rc)  in pmem_drc_remove_node()
90 		return rc;  in pmem_drc_remove_node()
92 	rc = dlpar_release_drc(drc_index);  in pmem_drc_remove_node()
93 	if (rc) {  in pmem_drc_remove_node()
94 		pr_err("Failed to release drc (%x) for CPU %pOFn, rc: %d\n",  in pmem_drc_remove_node()
95 			drc_index, dn, rc);  in pmem_drc_remove_node()
97 		return rc;  in pmem_drc_remove_node()
100 	pr_info("Successfully removed PMEM with drc index: %x\n", drc_index);  in pmem_drc_remove_node()
108 	int rc;  in dlpar_hp_pmem()  local
112 		pmem_node = of_find_node_by_type(NULL, "ibm,persistent-memory");  in dlpar_hp_pmem()
115 		return -ENODEV;  in dlpar_hp_pmem()
118 	if (hp_elog->id_type != PSERIES_HP_ELOG_ID_DRC_INDEX) {  in dlpar_hp_pmem()
120 				hp_elog->id_type);  in dlpar_hp_pmem()
121 		return -EINVAL;  in dlpar_hp_pmem()
124 	drc_index = be32_to_cpu(hp_elog->_drc_u.drc_index);  in dlpar_hp_pmem()
128 	if (hp_elog->action == PSERIES_HP_ELOG_ACTION_ADD) {  in dlpar_hp_pmem()
129 		rc = pmem_drc_add_node(drc_index);  in dlpar_hp_pmem()
130 	} else if (hp_elog->action == PSERIES_HP_ELOG_ACTION_REMOVE) {  in dlpar_hp_pmem()
131 		rc = pmem_drc_remove_node(drc_index);  in dlpar_hp_pmem()
133 		pr_err("Unsupported hotplug action (%d)\n", hp_elog->action);  in dlpar_hp_pmem()
134 		rc = -EINVAL;  in dlpar_hp_pmem()
138 	return rc;  in dlpar_hp_pmem()
142 	{ .type = "ibm,persistent-memory", },
154 	pmem_node = of_find_node_by_type(NULL, "ibm,persistent-memory");  in pseries_pmem_init()
161 	 * reconfig notifier to handle the hot-add/remove cases too.  in pseries_pmem_init()