1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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39 * modification, are permitted provided that the following conditions
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64 *****************************************************************************/
66 #include <net/mac80211.h>
70 #define QUOTA_100 IWL_MVM_MAX_QUOTA
71 #define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
73 struct iwl_mvm_quota_iterator_data {
74 int n_interfaces[MAX_BINDINGS];
75 int colors[MAX_BINDINGS];
76 int low_latency[MAX_BINDINGS];
77 int n_low_latency_bindings;
78 struct ieee80211_vif *disabled_vif;
81 static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
82 struct ieee80211_vif *vif)
84 struct iwl_mvm_quota_iterator_data *data = _data;
85 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
88 /* skip disabled interfaces here immediately */
89 if (vif == data->disabled_vif)
92 if (!mvmvif->phy_ctxt)
95 /* currently, PHY ID == binding ID */
96 id = mvmvif->phy_ctxt->id;
98 /* need at least one binding per PHY */
99 BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
101 if (WARN_ON_ONCE(id >= MAX_BINDINGS))
105 case NL80211_IFTYPE_STATION:
106 if (vif->bss_conf.assoc)
109 case NL80211_IFTYPE_AP:
110 case NL80211_IFTYPE_ADHOC:
111 if (mvmvif->ap_ibss_active)
114 case NL80211_IFTYPE_MONITOR:
115 if (mvmvif->monitor_active)
118 case NL80211_IFTYPE_P2P_DEVICE:
125 if (data->colors[id] < 0)
126 data->colors[id] = mvmvif->phy_ctxt->color;
128 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
130 data->n_interfaces[id]++;
132 if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
133 data->n_low_latency_bindings++;
134 data->low_latency[id] = true;
138 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
139 struct iwl_time_quota_cmd *cmd)
141 #ifdef CONFIG_NL80211_TESTMODE
142 struct iwl_mvm_vif *mvmvif;
143 int i, phy_id = -1, beacon_int = 0;
145 if (!mvm->noa_duration || !mvm->noa_vif)
148 mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
149 if (!mvmvif->ap_ibss_active)
152 phy_id = mvmvif->phy_ctxt->id;
153 beacon_int = mvm->noa_vif->bss_conf.beacon_int;
155 for (i = 0; i < MAX_BINDINGS; i++) {
156 u32 id_n_c = le32_to_cpu(cmd->quotas[i].id_and_color);
157 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
158 u32 quota = le32_to_cpu(cmd->quotas[i].quota);
163 quota *= (beacon_int - mvm->noa_duration);
166 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
167 le32_to_cpu(cmd->quotas[i].quota), quota);
169 cmd->quotas[i].quota = cpu_to_le32(quota);
174 int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
175 struct ieee80211_vif *disabled_vif)
177 struct iwl_time_quota_cmd cmd = {};
178 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
179 struct iwl_mvm_quota_iterator_data data = {
181 .colors = { -1, -1, -1, -1 },
182 .disabled_vif = disabled_vif,
184 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
187 lockdep_assert_held(&mvm->mutex);
189 /* update all upon completion */
190 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
193 /* iterator data above must match */
194 BUILD_BUG_ON(MAX_BINDINGS != 4);
196 ieee80211_iterate_active_interfaces_atomic(
197 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
198 iwl_mvm_quota_iterator, &data);
201 * The FW's scheduling session consists of
202 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
203 * equally between all the bindings that require quota
206 for (i = 0; i < MAX_BINDINGS; i++) {
207 cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
208 num_active_macs += data.n_interfaces[i];
211 n_non_lowlat = num_active_macs;
213 if (data.n_low_latency_bindings == 1) {
214 for (i = 0; i < MAX_BINDINGS; i++) {
215 if (data.low_latency[i]) {
216 n_non_lowlat -= data.n_interfaces[i];
222 if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
224 * Reserve quota for the low latency binding in case that
225 * there are several data bindings but only a single
226 * low latency one. Split the rest of the quota equally
227 * between the other data interfaces.
229 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
230 quota_rem = QUOTA_100 - n_non_lowlat * quota -
233 "quota: low-latency binding active, remaining quota per other binding: %d\n",
235 } else if (num_active_macs) {
237 * There are 0 or more than 1 low latency bindings, or all the
238 * data interfaces belong to the single low latency binding.
239 * Split the quota equally between the data interfaces.
241 quota = QUOTA_100 / num_active_macs;
242 quota_rem = QUOTA_100 % num_active_macs;
244 "quota: splitting evenly per binding: %d\n",
247 /* values don't really matter - won't be used */
252 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
253 if (data.colors[i] < 0)
256 cmd.quotas[idx].id_and_color =
257 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
259 if (data.n_interfaces[i] <= 0)
260 cmd.quotas[idx].quota = cpu_to_le32(0);
261 else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
264 * There is more than one binding, but only one of the
265 * bindings is in low latency. For this case, allocate
266 * the minimal required quota for the low latency
269 cmd.quotas[idx].quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
271 cmd.quotas[idx].quota =
272 cpu_to_le32(quota * data.n_interfaces[i]);
274 WARN_ONCE(le32_to_cpu(cmd.quotas[idx].quota) > QUOTA_100,
275 "Binding=%d, quota=%u > max=%u\n",
276 idx, le32_to_cpu(cmd.quotas[idx].quota), QUOTA_100);
278 cmd.quotas[idx].max_duration = cpu_to_le32(0);
283 /* Give the remainder of the session to the first data binding */
284 for (i = 0; i < MAX_BINDINGS; i++) {
285 if (le32_to_cpu(cmd.quotas[i].quota) != 0) {
286 le32_add_cpu(&cmd.quotas[i].quota, quota_rem);
288 "quota: giving remainder of %d to binding %d\n",
294 iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
296 /* check that we have non-zero quota for all valid bindings */
297 for (i = 0; i < MAX_BINDINGS; i++) {
298 if (cmd.quotas[i].id_and_color != last->quotas[i].id_and_color)
300 if (cmd.quotas[i].max_duration != last->quotas[i].max_duration)
302 if (abs((int)le32_to_cpu(cmd.quotas[i].quota) -
303 (int)le32_to_cpu(last->quotas[i].quota))
304 > IWL_MVM_QUOTA_THRESHOLD)
306 if (cmd.quotas[i].id_and_color == cpu_to_le32(FW_CTXT_INVALID))
308 WARN_ONCE(cmd.quotas[i].quota == 0,
309 "zero quota on binding %d\n", i);
313 /* don't send a practically unchanged command, the firmware has
314 * to re-initialize a lot of state and that can have an adverse
320 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, sizeof(cmd), &cmd);
323 IWL_ERR(mvm, "Failed to send quota: %d\n", err);
325 mvm->last_quota_cmd = cmd;