/* * Copyright 2002-2005, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * Copyright (c) 2006 Jiri Benc * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include "rate.h" #include "ieee80211_i.h" #include "debugfs.h" #include #define CONFIG_COMPAT_MAC80211_RC_DEFAULT "minstrel_ht" struct rate_control_alg { struct list_head list; struct rate_control_ops *ops; }; static LIST_HEAD(rate_ctrl_algs); static DEFINE_MUTEX(rate_ctrl_mutex); static char *ieee80211_default_rc_algo = CONFIG_COMPAT_MAC80211_RC_DEFAULT; module_param(ieee80211_default_rc_algo, charp, 0644); MODULE_PARM_DESC(ieee80211_default_rc_algo, "Default rate control algorithm for mac80211 to use"); int ieee80211_rate_control_register(struct rate_control_ops *ops) { struct rate_control_alg *alg; if (!ops->name) return -EINVAL; mutex_lock(&rate_ctrl_mutex); list_for_each_entry(alg, &rate_ctrl_algs, list) { if (!strcmp(alg->ops->name, ops->name)) { /* don't register an algorithm twice */ WARN_ON(1); mutex_unlock(&rate_ctrl_mutex); return -EALREADY; } } alg = atbm_kzalloc(sizeof(*alg), GFP_KERNEL); if (alg == NULL) { mutex_unlock(&rate_ctrl_mutex); return -ENOMEM; } alg->ops = ops; list_add_tail(&alg->list, &rate_ctrl_algs); mutex_unlock(&rate_ctrl_mutex); return 0; } //EXPORT_SYMBOL(ieee80211_rate_control_register); void ieee80211_rate_control_unregister(struct rate_control_ops *ops) { struct rate_control_alg *alg; mutex_lock(&rate_ctrl_mutex); list_for_each_entry(alg, &rate_ctrl_algs, list) { if (alg->ops == ops) { list_del(&alg->list); atbm_kfree(alg); break; } } mutex_unlock(&rate_ctrl_mutex); } //EXPORT_SYMBOL(ieee80211_rate_control_unregister); static struct rate_control_ops * ieee80211_try_rate_control_ops_get(const char *name) { struct rate_control_alg *alg; struct rate_control_ops *ops = NULL; if (!name) return NULL; mutex_lock(&rate_ctrl_mutex); list_for_each_entry(alg, &rate_ctrl_algs, list) { if (!strcmp(alg->ops->name, name)) if (try_module_get(alg->ops->module)) { ops = alg->ops; break; } } mutex_unlock(&rate_ctrl_mutex); return ops; } /* Get the rate control algorithm. */ static struct rate_control_ops * ieee80211_rate_control_ops_get(const char *name) { struct rate_control_ops *ops; const char *alg_name; #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)) kparam_block_sysfs_write(ieee80211_default_rc_algo); #else kernel_param_lock(THIS_MODULE); #endif if (!name) alg_name = ieee80211_default_rc_algo; else alg_name = name; ops = ieee80211_try_rate_control_ops_get(alg_name); if (!ops) { request_module("rc80211_%s", alg_name); ops = ieee80211_try_rate_control_ops_get(alg_name); } if (!ops && name) /* try default if specific alg requested but not found */ ops = ieee80211_try_rate_control_ops_get(ieee80211_default_rc_algo); /* try built-in one if specific alg requested but not found */ if (!ops && strlen(CONFIG_COMPAT_MAC80211_RC_DEFAULT)) ops = ieee80211_try_rate_control_ops_get(CONFIG_COMPAT_MAC80211_RC_DEFAULT); #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)) kparam_unblock_sysfs_write(ieee80211_default_rc_algo); #else kernel_param_unlock(THIS_MODULE); #endif return ops; } static void ieee80211_rate_control_ops_put(struct rate_control_ops *ops) { module_put(ops->module); } #ifdef CONFIG_MAC80211_ATBM_DEBUGFS static ssize_t rcname_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { struct rate_control_ref *ref = file->private_data; int len = strlen(ref->ops->name); return simple_read_from_buffer(userbuf, count, ppos, ref->ops->name, len); } static const struct file_operations rcname_ops = { .read = rcname_read, .open = mac80211_open_file_generic, .llseek = default_llseek, }; #endif static struct rate_control_ref *rate_control_alloc(const char *name, struct ieee80211_local *local) { struct dentry *debugfsdir = NULL; struct rate_control_ref *ref; ref = atbm_kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL); if (!ref) goto fail_ref; kref_init(&ref->kref); ref->local = local; ref->ops = ieee80211_rate_control_ops_get(name); if (!ref->ops) goto fail_ops; #ifdef CONFIG_MAC80211_ATBM_DEBUGFS debugfsdir = debugfs_create_dir("rc", local->hw.wiphy->debugfsdir); local->debugfs.rcdir = debugfsdir; debugfs_create_file("name", 0400, debugfsdir, ref, &rcname_ops); #endif ref->priv = ref->ops->alloc(&local->hw, debugfsdir); if (!ref->priv) goto fail_priv; return ref; fail_priv: ieee80211_rate_control_ops_put(ref->ops); fail_ops: atbm_kfree(ref); fail_ref: return NULL; } static void rate_control_release(struct kref *kref) { struct rate_control_ref *ctrl_ref; ctrl_ref = container_of(kref, struct rate_control_ref, kref); ctrl_ref->ops->free(ctrl_ref->priv); #ifdef CONFIG_MAC80211_ATBM_DEBUGFS debugfs_remove_recursive(ctrl_ref->local->debugfs.rcdir); ctrl_ref->local->debugfs.rcdir = NULL; #endif ieee80211_rate_control_ops_put(ctrl_ref->ops); atbm_kfree(ctrl_ref); } static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc) { struct sk_buff *skb = txrc->skb; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); __le16 fc; fc = hdr->frame_control; return (info->flags & (IEEE80211_TX_CTL_NO_ACK | IEEE80211_TX_CTL_USE_MINRATE)) || !ieee80211_is_data(fc); } static void rc_send_low_broadcast(s8 *idx, u32 basic_rates, struct ieee80211_supported_band *sband) { u8 i; if (basic_rates == 0) return; /* assume basic rates unknown and accept rate */ if (*idx < 0) return; if (basic_rates & (1 << *idx)) return; /* selected rate is a basic rate */ for (i = *idx + 1; i <= sband->n_bitrates; i++) { if (basic_rates & (1 << i)) { *idx = i; return; } } /* could not find a basic rate; use original selection */ } static inline s8 rate_lowest_non_cck_index(struct ieee80211_supported_band *sband, struct ieee80211_sta *sta) { int i; for (i = 0; i < sband->n_bitrates; i++) { struct ieee80211_rate *srate = &sband->bitrates[i]; if ((srate->bitrate == 10) || (srate->bitrate == 20) || (srate->bitrate == 55) || (srate->bitrate == 110)) continue; if (rate_supported(sta, sband->band, i)) return i; } /* No matching rate found */ return 0; } bool rate_control_send_low(struct ieee80211_sta *sta, void *priv_sta, struct ieee80211_tx_rate_control *txrc) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb); struct ieee80211_supported_band *sband = txrc->sband; int mcast_rate; if (!sta || !priv_sta || rc_no_data_or_no_ack_use_min(txrc)) { if ((sband->band != IEEE80211_BAND_2GHZ) || !(info->flags & IEEE80211_TX_CTL_NO_CCK_RATE)) info->control.rates[0].idx = rate_lowest_index(txrc->sband, sta); else info->control.rates[0].idx = rate_lowest_non_cck_index(txrc->sband, sta); info->control.rates[0].count = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 1 : txrc->hw->max_rate_tries; if (!sta && txrc->bss) { mcast_rate = txrc->bss_conf->mcast_rate[sband->band]; if (mcast_rate > 0) { info->control.rates[0].idx = mcast_rate - 1; return true; } rc_send_low_broadcast(&info->control.rates[0].idx, txrc->bss_conf->basic_rates, sband); } return true; } return false; } //EXPORT_SYMBOL(rate_control_send_low); static void rate_idx_match_mask(struct ieee80211_tx_rate *rate, int n_bitrates, u32 mask) { int j; /* See whether the selected rate or anything below it is allowed. */ for (j = rate->idx; j >= 0; j--) { if (mask & (1 << j)) { /* Okay, found a suitable rate. Use it. */ rate->idx = j; return; } } /* Try to find a higher rate that would be allowed */ for (j = rate->idx + 1; j < n_bitrates; j++) { if (mask & (1 << j)) { /* Okay, found a suitable rate. Use it. */ rate->idx = j; return; } } /* * Uh.. No suitable rate exists. This should not really happen with * sane TX rate mask configurations. However, should someone manage to * configure supported rates and TX rate mask in incompatible way, * allow the frame to be transmitted with whatever the rate control * selected. */ } #if defined(CONFIG_NL80211_TESTMODE) || defined(CONFIG_ATBM_IOCTRL) /*g_atbm_rate_Ctl[0] multicast rate control **g_atbm_rate_Ctl[1] unicast rate control */ struct tagAtbmRateControl g_atbm_rate_Ctl; #define RATEFIXED 1 #define RATEUNFIXED 0 #define INDEX_MAX 11 #define INDEX_MIN 0 #define INDEX_MCS_MAX 7 #define INDEX_MCS_MIN 0 #define RATE_CONTROL_MUTICAST 0 #define RATE_CONTROL_UNICAST 1 #endif void rate_control_get_rate(struct ieee80211_sub_if_data *sdata, struct sta_info *sta, struct ieee80211_tx_rate_control *txrc) { struct rate_control_ref *ref = sdata->local->rate_ctrl; void *priv_sta = NULL; struct ieee80211_sta *ista = NULL; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb); int i; u32 mask; #if defined(CONFIG_NL80211_TESTMODE) || defined(CONFIG_ATBM_IOCTRL) struct ieee80211_hdr *hdr = (void *)txrc->skb->data; int index = 0; #endif if (sta) { ista = &sta->sta; priv_sta = sta->rate_ctrl_priv; } for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { info->control.rates[i].idx = -1; info->control.rates[i].flags = 0; info->control.rates[i].count = 1; } if (sdata->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) return; ref->ops->get_rate(ref->priv, ista, priv_sta, txrc); /* * Try to enforce the rateidx mask the user wanted. skip this if the * default mask (allow all rates) is used to save some processing for * the common case. */ mask = sdata->rc_rateidx_mask[info->band]; if (mask != (1 << txrc->sband->n_bitrates) - 1) { if (sta) { /* Filter out rates that the STA does not support */ mask &= sta->sta.supp_rates[info->band]; } /* * Make sure the rate index selected for each TX rate is * included in the configured mask and change the rate indexes * if needed. */ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { /* Skip invalid rates */ if (info->control.rates[i].idx < 0) break; /* Rate masking supports only legacy rates for now */ if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) continue; rate_idx_match_mask(&info->control.rates[i], txrc->sband->n_bitrates, mask); } } BUG_ON(info->control.rates[0].idx < 0); #if defined(CONFIG_NL80211_TESTMODE) || defined(CONFIG_ATBM_IOCTRL) /*g_atbm_rate_Ctl[0] multicast rate control **g_atbm_rate_Ctl[1] unicast rate control */ if (is_multicast_ether_addr(hdr->addr1)) { index = RATE_CONTROL_MUTICAST; }else{ index = RATE_CONTROL_UNICAST; } /* rate fixed*/ if (0 != g_atbm_rate_Ctl.rate_fix[index]) { if (g_atbm_rate_Ctl.my_flags[index] & IEEE80211_TX_RC_MCS) { if (g_atbm_rate_Ctl.my_index[index] > INDEX_MCS_MAX || g_atbm_rate_Ctl.my_index[index] < INDEX_MCS_MIN) { atbm_printk_err("Rate fix to %d wrong\n", g_atbm_rate_Ctl.my_index[index]); return; } } else { if (g_atbm_rate_Ctl.my_index[index] > INDEX_MAX || g_atbm_rate_Ctl.my_index[index] < INDEX_MIN) { atbm_printk_err("Rate fix to %d wrong\n", g_atbm_rate_Ctl.my_index[index]); return; } } for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { info->control.rates[i].idx = g_atbm_rate_Ctl.my_index[index]; info->control.rates[i].flags = g_atbm_rate_Ctl.my_flags[index]; if(info->flags & IEEE80211_TX_CTL_NO_ACK) info->control.rates[i].count = 1; else info->control.rates[i].count = 7; } } #endif } struct rate_control_ref *rate_control_get(struct rate_control_ref *ref) { kref_get(&ref->kref); return ref; } void rate_control_put(struct rate_control_ref *ref) { kref_put(&ref->kref, rate_control_release); } #if defined(CONFIG_NL80211_TESTMODE) && defined(CONFIG_ATBM_TEST_TOOL) enum altm_rate_control{ ALTM_RATE_SET_FIX = 1, ALTM_RATE_SET_FLAGS = 2, ALTM_RATE_SET_INDEX = 3, ALTM_RATE_GET_FIX = 4, ALTM_RATE_GET_FLAGS = 5, ALTM_RATE_GET_INDEX = 6, ALTM_RATE_SET_FIX_MULTI = 31, ALTM_RATE_SET_FLAGS_MULTI = 32, ALTM_RATE_SET_INDEX_MULTI = 33, ALTM_RATE_GET_FIX_MULTI = 34, ALTM_RATE_GET_FLAGS_MULTI = 35, ALTM_RATE_GET_INDEX_MULTI = 36, }; enum atbm_nl80211_testmode_data_attributes { ATBM_TM_MSG_ID = 0x0001, /* u32 type containing the ATBM message ID */ ATBM_TM_MSG_DATA, /* message payload */ /* Max indicator so module test may add its own attributes */ ATBM_TM_MSG_ATTR_MAX, }; extern int atbm_tesmode_reply(struct wiphy *wiphy, const void *data, int len); int rate_altm_control_test(struct wiphy *wiphy, void *data, int len) { struct altm_msg{ u8 type; u32 value; }; int ret = 0; struct altm_msg *msg = 0; struct ieee80211_local *local = wiphy_priv(wiphy); if(local->hw.vendcmd_nl80211 == 0) { struct nlattr *data_p = nla_find(data, len, ATBM_TM_MSG_DATA); if (!data_p) return -EINVAL; msg = (struct altm_msg *)nla_data(data_p); } else msg = (struct altm_msg *)data; atbm_printk_always("type:%d value:%d\n", msg->type, msg->value); switch (msg->type) { case ALTM_RATE_SET_FIX: //test_debug_enable = 1; g_atbm_rate_Ctl.rate_fix[RATE_CONTROL_UNICAST] = msg->value; break; case ALTM_RATE_SET_FLAGS: g_atbm_rate_Ctl.my_flags[RATE_CONTROL_UNICAST] = msg->value; break; case ALTM_RATE_SET_INDEX: g_atbm_rate_Ctl.my_index[RATE_CONTROL_UNICAST] = msg->value; break; case ALTM_RATE_GET_FIX: ret = atbm_tesmode_reply(wiphy, &g_atbm_rate_Ctl.rate_fix[RATE_CONTROL_UNICAST], sizeof(u32)); break; case ALTM_RATE_GET_FLAGS: ret = atbm_tesmode_reply(wiphy, &g_atbm_rate_Ctl.my_flags[RATE_CONTROL_UNICAST], sizeof(u8)); break; case ALTM_RATE_GET_INDEX: ret = atbm_tesmode_reply(wiphy, &g_atbm_rate_Ctl.my_index[RATE_CONTROL_UNICAST], sizeof(u8)); break; case ALTM_RATE_SET_FIX_MULTI: g_atbm_rate_Ctl.rate_fix[RATE_CONTROL_MUTICAST] = msg->value; break; case ALTM_RATE_SET_FLAGS_MULTI: g_atbm_rate_Ctl.my_flags[RATE_CONTROL_MUTICAST] = msg->value; break; case ALTM_RATE_SET_INDEX_MULTI: g_atbm_rate_Ctl.my_index[RATE_CONTROL_MUTICAST] = msg->value; break; case ALTM_RATE_GET_FIX_MULTI: ret = atbm_tesmode_reply(wiphy, &g_atbm_rate_Ctl.rate_fix[RATE_CONTROL_MUTICAST], sizeof(u32)); break; case ALTM_RATE_GET_FLAGS_MULTI: ret = atbm_tesmode_reply(wiphy, &g_atbm_rate_Ctl.my_flags[RATE_CONTROL_MUTICAST], sizeof(u8)); break; case ALTM_RATE_GET_INDEX_MULTI: ret = atbm_tesmode_reply(wiphy, &g_atbm_rate_Ctl.my_index[RATE_CONTROL_MUTICAST], sizeof(u8)); break; default: break; } return ret; } #endif int test_debug_enable = 0; void frame_hexdump(char *prefix, u8 *data, int len) { int i; atbm_printk_always( "%s hexdump:\n", prefix); for (i = 0; i < len; i++) { if((i % 16)==0) atbm_printk_always("\n"); atbm_printk_always("%02x ", data[i]); } } void ATBMWIFI_DBG_PRINT(const char * func,const int line) { \ if(test_debug_enable) atbm_printk_always("%s %d \n",func,line); } //EXPORT_SYMBOL(ATBMWIFI_DBG_PRINT); void ATBMWIFI_DBG_PRINT2(const char * func,const int line,unsigned int data) { \ if(test_debug_enable) atbm_printk_always("%s %d data[%x]\n",func,line,data); } //EXPORT_SYMBOL(ATBMWIFI_DBG_PRINT2); void ATBMWIFI_DBG_DUMP(char *prefix, u8 *data, int len) { if(test_debug_enable) frame_hexdump(prefix,data,len); } //EXPORT_SYMBOL(ATBMWIFI_DBG_DUMP); int atbm_ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, const char *name) { struct rate_control_ref *ref, *old; ASSERT_RTNL(); if (local->open_count) return -EBUSY; if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) { if (WARN_ON(!local->ops->set_rts_threshold)) return -EINVAL; return 0; } ref = rate_control_alloc(name, local); if (!ref) { atbm_printk_warn("Failed to select rate control algorithm,%s\n",name); return -ENOENT; } old = local->rate_ctrl; local->rate_ctrl = ref; if (old) { rate_control_put(old); sta_info_flush(local, NULL); } wiphy_debug(local->hw.wiphy, "Selected rate control algorithm '%s'\n", ref->ops->name); #if defined(CONFIG_NL80211_TESTMODE) || defined(CONFIG_ATBM_IOCTRL) memset(&g_atbm_rate_Ctl, 0, sizeof(g_atbm_rate_Ctl)); #endif return 0; } void rate_control_deinitialize(struct ieee80211_local *local) { struct rate_control_ref *ref; ref = local->rate_ctrl; if (!ref) return; local->rate_ctrl = NULL; rate_control_put(ref); }