offloading.c

  1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
  2/*
  3 * Copyright (C) 2012-2014, 2021-2022, 2024 Intel Corporation
  4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
  5 * Copyright (C) 2015 Intel Deutschland GmbH
  6 */
  7#include <net/ipv6.h>
  8#include <net/addrconf.h>
  9#include <linux/bitops.h>
 10#include "mvm.h"
 11
 12void iwl_mvm_set_wowlan_qos_seq(struct iwl_mvm_sta *mvm_ap_sta,
 13				struct iwl_wowlan_config_cmd_v6 *cmd)
 14{
 15	int i;
 16
 17	/*
 18	 * For QoS counters, we store the one to use next, so subtract 0x10
 19	 * since the uCode will add 0x10 *before* using the value while we
 20	 * increment after using the value (i.e. store the next value to use).
 21	 */
 22	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 23		u16 seq = mvm_ap_sta->tid_data[i].seq_number;
 24		seq -= 0x10;
 25		cmd->qos_seq[i] = cpu_to_le16(seq);
 26	}
 27}
 28
 29int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 30			       struct ieee80211_vif *vif,
 31			       bool disable_offloading,
 32			       bool offload_ns,
 33			       u32 cmd_flags,
 34			       u8 sta_id)
 35{
 36	union {
 37		struct iwl_proto_offload_cmd_v1 v1;
 38		struct iwl_proto_offload_cmd_v2 v2;
 39		struct iwl_proto_offload_cmd_v3_small v3s;
 40		struct iwl_proto_offload_cmd_v4 v4;
 41	} cmd = {};
 42	struct iwl_host_cmd hcmd = {
 43		.id = PROT_OFFLOAD_CONFIG_CMD,
 44		.flags = cmd_flags,
 45		.data[0] = &cmd,
 46		.dataflags[0] = IWL_HCMD_DFL_DUP,
 47	};
 48	struct iwl_proto_offload_cmd_common *common;
 49	u32 enabled = 0, size;
 50	u32 capa_flags = mvm->fw->ucode_capa.flags;
 51	int ver = iwl_fw_lookup_cmd_ver(mvm->fw, hcmd.id, 0);
 52
 53#if IS_ENABLED(CONFIG_IPV6)
 54	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 55	int i;
 56	/*
 57	 * Skip tentative address when ns offload is enabled to avoid
 58	 * violating RFC4862.
 59	 * Keep tentative address when ns offload is disabled so the NS packets
 60	 * will not be filtered out and will wake up the host.
 61	 */
 62	bool skip_tentative = offload_ns;
 63
 64	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL ||
 65	    capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
 66		struct iwl_ns_config *nsc;
 67		struct iwl_targ_addr *addrs;
 68		int n_nsc, n_addrs;
 69		int c;
 70		int num_skipped = 0;
 71
 72		if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
 73			nsc = cmd.v3s.ns_config;
 74			n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3S;
 75			addrs = cmd.v3s.targ_addrs;
 76			n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3S;
 77		} else {
 78			nsc = cmd.v4.ns_config;
 79			n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3L;
 80			addrs = cmd.v4.targ_addrs;
 81			n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3L;
 82		}
 83
 84		/*
 85		 * For each address we have (and that will fit) fill a target
 86		 * address struct and combine for NS offload structs with the
 87		 * solicited node addresses.
 88		 */
 89		for (i = 0, c = 0;
 90		     i < mvmvif->num_target_ipv6_addrs &&
 91		     i < n_addrs && c < n_nsc; i++) {
 92			struct in6_addr solicited_addr;
 93			int j;
 94
 95			if (skip_tentative &&
 96			    test_bit(i, mvmvif->tentative_addrs)) {
 97				num_skipped++;
 98				continue;
 99			}
100
101			addrconf_addr_solict_mult(&mvmvif->target_ipv6_addrs[i],
102						  &solicited_addr);
103			for (j = 0; j < c; j++)
104				if (ipv6_addr_cmp(&nsc[j].dest_ipv6_addr,
105						  &solicited_addr) == 0)
106					break;
107			if (j == c)
108				c++;
109			addrs[i].addr = mvmvif->target_ipv6_addrs[i];
110			addrs[i].config_num = cpu_to_le32(j);
111			nsc[j].dest_ipv6_addr = solicited_addr;
112			memcpy(nsc[j].target_mac_addr, vif->addr, ETH_ALEN);
113		}
114
115		if (mvmvif->num_target_ipv6_addrs - num_skipped)
116			enabled |= IWL_D3_PROTO_IPV6_VALID;
117
118		if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL)
119			cmd.v3s.num_valid_ipv6_addrs =
120				cpu_to_le32(i - num_skipped);
121		else
122			cmd.v4.num_valid_ipv6_addrs =
123				cpu_to_le32(i - num_skipped);
124	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
125		bool found = false;
126
127		BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
128			     sizeof(mvmvif->target_ipv6_addrs[0]));
129
130		for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
131				    IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++) {
132			if (skip_tentative &&
133			    test_bit(i, mvmvif->tentative_addrs))
134				continue;
135
136			memcpy(cmd.v2.target_ipv6_addr[i],
137			       &mvmvif->target_ipv6_addrs[i],
138			       sizeof(cmd.v2.target_ipv6_addr[i]));
139
140			found = true;
141		}
142		if (found) {
143			enabled |= IWL_D3_PROTO_IPV6_VALID;
144			memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
145		}
146	} else {
147		bool found = false;
148		BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
149			     sizeof(mvmvif->target_ipv6_addrs[0]));
150
151		for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
152				    IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++) {
153			if (skip_tentative &&
154			    test_bit(i, mvmvif->tentative_addrs))
155				continue;
156
157			memcpy(cmd.v1.target_ipv6_addr[i],
158			       &mvmvif->target_ipv6_addrs[i],
159			       sizeof(cmd.v1.target_ipv6_addr[i]));
160
161			found = true;
162		}
163
164		if (found) {
165			enabled |= IWL_D3_PROTO_IPV6_VALID;
166			memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
167		}
168	}
169
170	if (offload_ns && (enabled & IWL_D3_PROTO_IPV6_VALID))
171		enabled |= IWL_D3_PROTO_OFFLOAD_NS;
172#endif
173	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
174		common = &cmd.v3s.common;
175		size = sizeof(cmd.v3s);
176	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
177		common = &cmd.v4.common;
178		size = sizeof(cmd.v4);
179		if (ver < 4) {
180			/*
181			 * This basically uses iwl_proto_offload_cmd_v3_large
182			 * which doesn't have the sta_id parameter before the
183			 * common part.
184			 */
185			size -= sizeof(cmd.v4.sta_id);
186			hcmd.data[0] = common;
187		}
188	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
189		common = &cmd.v2.common;
190		size = sizeof(cmd.v2);
191	} else {
192		common = &cmd.v1.common;
193		size = sizeof(cmd.v1);
194	}
195
196	if (vif->cfg.arp_addr_cnt) {
197		enabled |= IWL_D3_PROTO_OFFLOAD_ARP | IWL_D3_PROTO_IPV4_VALID;
198		common->host_ipv4_addr = vif->cfg.arp_addr_list[0];
199		memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
200	}
201
202	if (fw_has_capa(&mvm->fw->ucode_capa,
203			IWL_UCODE_TLV_CAPA_OFFLOAD_BTM_SUPPORT))
204		enabled |= IWL_D3_PROTO_OFFLOAD_BTM;
205
206	if (!disable_offloading)
207		common->enabled = cpu_to_le32(enabled);
208
209	if (ver >= 4)
210		cmd.v4.sta_id = cpu_to_le32(sta_id);
211
212	hcmd.len[0] = size;
213	return iwl_mvm_send_cmd(mvm, &hcmd);
214}