rtl88x2CE_WiFi_linux driver

hc

2024-05-10 cde9070d9970eef1f7ec2360586c802a16230ad8

 kernel/arch/powerpc/platforms/pseries/mobility.c
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@@ -1,13 +1,13 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Support for Partition Mobility/Migration
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  *
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  * Copyright (C) 2010 Nathan Fontenot
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  * Copyright (C) 2010 IBM Corporation
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License version
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- * 2 as published by the Free Software Foundation.
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7
  */
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+
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+
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+#define pr_fmt(fmt) "mobility: " fmt
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11
 
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 #include <linux/cpu.h>
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 #include <linux/kernel.h>
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@@ -59,16 +59,31 @@
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 	return rc;
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 }
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61
 
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-static int delete_dt_node(__be32 phandle)
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+static int delete_dt_node(struct device_node *dn)
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 {
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-	struct device_node *dn;
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+	struct device_node *pdn;
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+	bool is_platfac;
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-	dn = of_find_node_by_phandle(be32_to_cpu(phandle));
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-	if (!dn)
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-		return -ENOENT;
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+	pdn = of_get_parent(dn);
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+	is_platfac = of_node_is_type(dn, "ibm,platform-facilities") ||
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+		     of_node_is_type(pdn, "ibm,platform-facilities");
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+	of_node_put(pdn);
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71
 
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+	/*
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+	 * The drivers that bind to nodes in the platform-facilities
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+	 * hierarchy don't support node removal, and the removal directive
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+	 * from firmware is always followed by an add of an equivalent
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+	 * node. The capability (e.g. RNG, encryption, compression)
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+	 * represented by the node is never interrupted by the migration.
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+	 * So ignore changes to this part of the tree.
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+	 */
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+	if (is_platfac) {
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+		pr_notice("ignoring remove operation for %pOFfp\n", dn);
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+		return 0;
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+	}
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+
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+	pr_debug("removing node %pOFfp\n", dn);
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 	dlpar_detach_node(dn);
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-	of_node_put(dn);
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 	return 0;
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 }
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@@ -125,6 +140,7 @@
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 	}
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141
 
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 	if (!more) {
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+		pr_debug("updating node %pOF property %s\n", dn, name);
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 		of_update_property(dn, new_prop);
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 		*prop = NULL;
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 	}
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@@ -132,10 +148,9 @@
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 	return 0;
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 }
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150
 
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-static int update_dt_node(__be32 phandle, s32 scope)
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+static int update_dt_node(struct device_node *dn, s32 scope)
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 {
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 	struct update_props_workarea *upwa;
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-	struct device_node *dn;
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 	struct property *prop = NULL;
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 	int i, rc, rtas_rc;
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156
 	char *prop_data;
..
..
@@ -152,14 +167,8 @@
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 	if (!rtas_buf)
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168
 		return -ENOMEM;
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169
 
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-	dn = of_find_node_by_phandle(be32_to_cpu(phandle));
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-	if (!dn) {
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-		kfree(rtas_buf);
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-		return -ENOENT;
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-	}
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-
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 	upwa = (struct update_props_workarea *)&rtas_buf[0];
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-	upwa->phandle = phandle;
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+	upwa->phandle = cpu_to_be32(dn->phandle);
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172
 
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 	do {
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 		rtas_rc = mobility_rtas_call(update_properties_token, rtas_buf,
..
..
@@ -218,62 +227,39 @@
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 		cond_resched();
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 	} while (rtas_rc == 1);
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229
 
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-	of_node_put(dn);
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 	kfree(rtas_buf);
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 	return 0;
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 }
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233
 
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-static int add_dt_node(__be32 parent_phandle, __be32 drc_index)
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+static int add_dt_node(struct device_node *parent_dn, __be32 drc_index)
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 {
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 	struct device_node *dn;
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-	struct device_node *parent_dn;
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237
 	int rc;
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238
 
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-	parent_dn = of_find_node_by_phandle(be32_to_cpu(parent_phandle));
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-	if (!parent_dn)
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+	dn = dlpar_configure_connector(drc_index, parent_dn);
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+	if (!dn)
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 		return -ENOENT;
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242
 
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-	dn = dlpar_configure_connector(drc_index, parent_dn);
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-	if (!dn) {
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-		of_node_put(parent_dn);
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-		return -ENOENT;
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+	/*
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+	 * Since delete_dt_node() ignores this node type, this is the
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+	 * necessary counterpart. We also know that a platform-facilities
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+	 * node returned from dlpar_configure_connector() has children
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+	 * attached, and dlpar_attach_node() only adds the parent, leaking
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+	 * the children. So ignore these on the add side for now.
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+	 */
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+	if (of_node_is_type(dn, "ibm,platform-facilities")) {
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+		pr_notice("ignoring add operation for %pOF\n", dn);
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+		dlpar_free_cc_nodes(dn);
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+		return 0;
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254
 	}
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255
 
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 	rc = dlpar_attach_node(dn, parent_dn);
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257
 	if (rc)
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258
 		dlpar_free_cc_nodes(dn);
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259
 
246
-	of_node_put(parent_dn);
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+	pr_debug("added node %pOFfp\n", dn);
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+
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262
 	return rc;
248
-}
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-
250
-static void prrn_update_node(__be32 phandle)
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-{
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-	struct pseries_hp_errorlog *hp_elog;
253
-	struct device_node *dn;
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-
255
-	/*
256
-	 * If a node is found from a the given phandle, the phandle does not
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-	 * represent the drc index of an LMB and we can ignore.
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-	 */
259
-	dn = of_find_node_by_phandle(be32_to_cpu(phandle));
260
-	if (dn) {
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-		of_node_put(dn);
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-		return;
263
-	}
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-
265
-	hp_elog = kzalloc(sizeof(*hp_elog), GFP_KERNEL);
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-	if(!hp_elog)
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-		return;
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-
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-	hp_elog->resource = PSERIES_HP_ELOG_RESOURCE_MEM;
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-	hp_elog->action = PSERIES_HP_ELOG_ACTION_READD;
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-	hp_elog->id_type = PSERIES_HP_ELOG_ID_DRC_INDEX;
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-	hp_elog->_drc_u.drc_index = phandle;
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-
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-	queue_hotplug_event(hp_elog, NULL, NULL);
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-
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-	kfree(hp_elog);
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263
 }
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264
 
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 int pseries_devicetree_update(s32 scope)
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@@ -305,26 +291,31 @@
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291
 			data++;
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292
 
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 			for (i = 0; i < node_count; i++) {
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+				struct device_node *np;
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295
 				__be32 phandle = *data++;
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296
 				__be32 drc_index;
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297
 
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+				np = of_find_node_by_phandle(be32_to_cpu(phandle));
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+				if (!np) {
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+					pr_warn("Failed lookup: phandle 0x%x for action 0x%x\n",
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+						be32_to_cpu(phandle), action);
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+					continue;
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+				}
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+
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305
 				switch (action) {
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 				case DELETE_DT_NODE:
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-					delete_dt_node(phandle);
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+					delete_dt_node(np);
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 					break;
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 				case UPDATE_DT_NODE:
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-					update_dt_node(phandle, scope);
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-
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-					if (scope == PRRN_SCOPE)
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-						prrn_update_node(phandle);
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-
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+					update_dt_node(np, scope);
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311
 					break;
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 				case ADD_DT_NODE:
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313
 					drc_index = *data++;
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-					add_dt_node(phandle, drc_index);
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+					add_dt_node(np, drc_index);
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315
 					break;
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316
 				}
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317
 
318
+				of_node_put(np);
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319
 				cond_resched();
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320
 			}
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321
 		}
..
..
@@ -377,8 +368,11 @@
377
368
 
378
369
 	cpus_read_unlock();
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370
 
380
-	/* Possibly switch to a new RFI flush type */
381
-	pseries_setup_rfi_flush();
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+	/* Possibly switch to a new L1 flush type */
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+	pseries_setup_security_mitigations();
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+
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+	/* Reinitialise system information for hv-24x7 */
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+	read_24x7_sys_info();
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376
 
383
377
 	return;
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378
 }
..
..
@@ -404,6 +398,7 @@
404
398
 		return rc;
405
399
 
406
400
 	post_mobility_fixup();
401
+
407
402
 	return count;
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403
 }
409
404
 
..
..
@@ -428,11 +423,11 @@
428
423
 
429
424
 	rc = sysfs_create_file(mobility_kobj, &class_attr_migration.attr);
430
425
 	if (rc)
431
-		pr_err("mobility: unable to create migration sysfs file (%d)\n", rc);
426
+		pr_err("unable to create migration sysfs file (%d)\n", rc);
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427
 
433
428
 	rc = sysfs_create_file(mobility_kobj, &class_attr_api_version.attr.attr);
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429
 	if (rc)
435
-		pr_err("mobility: unable to create api_version sysfs file (%d)\n", rc);
430
+		pr_err("unable to create api_version sysfs file (%d)\n", rc);
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431
 
437
432
 	return 0;
438
433
 }