Return-path: Received: from hostap.isc.org ([149.20.54.63]:45197 "EHLO hostap.isc.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754106AbYJ2RyJ (ORCPT ); Wed, 29 Oct 2008 13:54:09 -0400 Message-Id: <20081029175307.601433193@localhost> (sfid-20081029_185412_767284_9748E9D0) References: <20081029174934.817700763@localhost> Date: Wed, 29 Oct 2008 19:49:38 +0200 From: Jouni Malinen To: "John W. Linville" Cc: Johannes Berg , linux-wireless@vger.kernel.org Subject: [PATCH 4/4] nl80211: Add TX queue parameter configuration Sender: linux-wireless-owner@vger.kernel.org List-ID: Add a new attribute, NL80211_ATTR_WIPHY_TXQ_PARAMS, that can be used with NL80211_CMD_SET_WIPHY for userspace (e.g., hostapd) to set TX queue parameters (txop, cwmin, cwmax, aifs). Signed-off-by: Jouni Malinen Index: wireless-testing/include/linux/nl80211.h =================================================================== --- wireless-testing.orig/include/linux/nl80211.h +++ wireless-testing/include/linux/nl80211.h @@ -25,8 +25,9 @@ * * @NL80211_CMD_GET_WIPHY: request information about a wiphy or dump request * to get a list of all present wiphys. - * @NL80211_CMD_SET_WIPHY: set wiphy name, needs %NL80211_ATTR_WIPHY and - * %NL80211_ATTR_WIPHY_NAME. + * @NL80211_CMD_SET_WIPHY: set wiphy parameters, needs %NL80211_ATTR_WIPHY or + * %NL80211_ATTR_IFINDEX; can be used to set %NL80211_ATTR_WIPHY_NAME + * and/or %NL80211_ATTR_WIPHY_TXQ_PARAMS. * @NL80211_CMD_NEW_WIPHY: Newly created wiphy, response to get request * or rename notification. Has attributes %NL80211_ATTR_WIPHY and * %NL80211_ATTR_WIPHY_NAME. @@ -178,6 +179,7 @@ enum nl80211_commands { * @NL80211_ATTR_WIPHY: index of wiphy to operate on, cf. * /sys/class/ieee80211//index * @NL80211_ATTR_WIPHY_NAME: wiphy name (used for renaming) + * @NL80211_ATTR_WIPHY_TXQ_PARAMS: a nested array of TX queue parameters * * @NL80211_ATTR_IFINDEX: network interface index of the device to operate on * @NL80211_ATTR_IFNAME: network interface name @@ -312,6 +314,8 @@ enum nl80211_attrs { NL80211_ATTR_BSS_BASIC_RATES, + NL80211_ATTR_WIPHY_TXQ_PARAMS, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -324,6 +328,7 @@ enum nl80211_attrs { */ #define NL80211_ATTR_HT_CAPABILITY NL80211_ATTR_HT_CAPABILITY #define NL80211_ATTR_BSS_BASIC_RATES NL80211_ATTR_BSS_BASIC_RATES +#define NL80211_ATTR_WIPHY_TXQ_PARAMS NL80211_ATTR_WIPHY_TXQ_PARAMS #define NL80211_MAX_SUPP_RATES 32 #define NL80211_MAX_SUPP_REG_RULES 32 @@ -698,4 +703,35 @@ enum nl80211_meshconf_params { NL80211_MESHCONF_ATTR_MAX = __NL80211_MESHCONF_ATTR_AFTER_LAST - 1 }; +/** + * enum nl80211_txq_attr - TX queue parameter attributes + * @NL80211_TXQ_ATTR_QUEUE: TX queue identifier (NL80211_TXQ_Q_*) + * @NL80211_TXQ_ATTR_TXOP: Maximum burst time in units of 32 usecs, 0 meaning + * disabled + * @NL80211_TXQ_ATTR_CWMIN: Minimum contention window [a value of the form + * 2^n-1 in the range 1..32767] + * @NL80211_TXQ_ATTR_CWMAX: Maximum contention window [a value of the form + * 2^n-1 in the range 1..32767] + * @NL80211_TXQ_ATTR_AIFS: Arbitration interframe space [0..255] + */ +enum nl80211_txq_attr { + __NL80211_TXQ_ATTR_INVALID, + NL80211_TXQ_ATTR_QUEUE, + NL80211_TXQ_ATTR_TXOP, + NL80211_TXQ_ATTR_CWMIN, + NL80211_TXQ_ATTR_CWMAX, + NL80211_TXQ_ATTR_AIFS, + + /* keep last */ + __NL80211_TXQ_ATTR_AFTER_LAST, + NL80211_TXQ_ATTR_MAX = __NL80211_TXQ_ATTR_AFTER_LAST - 1 +}; + +enum nl80211_txq_q { + NL80211_TXQ_Q_VO, + NL80211_TXQ_Q_VI, + NL80211_TXQ_Q_BE, + NL80211_TXQ_Q_BK +}; + #endif /* __LINUX_NL80211_H */ Index: wireless-testing/include/net/cfg80211.h =================================================================== --- wireless-testing.orig/include/net/cfg80211.h +++ wireless-testing/include/net/cfg80211.h @@ -371,6 +371,14 @@ struct mesh_config { u16 dot11MeshHWMPnetDiameterTraversalTime; }; +struct ieee80211_txq_params { + u8 queue; + u16 txop; + u16 cwmin; + u16 cwmax; + u8 aifs; +}; + /* from net/wireless.h */ struct wiphy; @@ -430,6 +438,8 @@ struct wiphy; * @set_mesh_cfg: set mesh parameters (by now, just mesh id) * * @change_bss: Modify parameters for a given BSS. + * + * @set_txq_params: Set TX queue parameters */ struct cfg80211_ops { int (*add_virtual_intf)(struct wiphy *wiphy, char *name, @@ -490,6 +500,9 @@ struct cfg80211_ops { const struct mesh_config *nconf, u32 mask); int (*change_bss)(struct wiphy *wiphy, struct net_device *dev, struct bss_parameters *params); + + int (*set_txq_params)(struct wiphy *wiphy, + struct ieee80211_txq_params *params); }; #endif /* __NET_CFG80211_H */ Index: wireless-testing/net/mac80211/cfg.c =================================================================== --- wireless-testing.orig/net/mac80211/cfg.c +++ wireless-testing/net/mac80211/cfg.c @@ -1069,6 +1069,30 @@ static int ieee80211_change_bss(struct w return 0; } +static int ieee80211_set_txq_params(struct wiphy *wiphy, + struct ieee80211_txq_params *params) +{ + struct ieee80211_local *local = wiphy_priv(wiphy); + struct ieee80211_tx_queue_params p; + + if (!local->ops->conf_tx) + return -EOPNOTSUPP; + + memset(&p, 0, sizeof(p)); + p.aifs = params->aifs; + p.cw_max = params->cwmax; + p.cw_min = params->cwmin; + p.txop = params->txop; + if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) { + printk(KERN_DEBUG "%s: failed to set TX queue " + "parameters for queue %d\n", local->mdev->name, + params->queue); + return -EINVAL; + } + + return 0; +} + struct cfg80211_ops mac80211_config_ops = { .add_virtual_intf = ieee80211_add_iface, .del_virtual_intf = ieee80211_del_iface, @@ -1095,4 +1119,5 @@ struct cfg80211_ops mac80211_config_ops .get_mesh_params = ieee80211_get_mesh_params, #endif .change_bss = ieee80211_change_bss, + .set_txq_params = ieee80211_set_txq_params, }; Index: wireless-testing/net/wireless/nl80211.c =================================================================== --- wireless-testing.orig/net/wireless/nl80211.c +++ wireless-testing/net/wireless/nl80211.c @@ -58,6 +58,7 @@ static struct nla_policy nl80211_policy[ [NL80211_ATTR_WIPHY] = { .type = NLA_U32 }, [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING, .len = BUS_ID_SIZE-1 }, + [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED }, [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 }, [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 }, @@ -286,20 +287,76 @@ static int nl80211_get_wiphy(struct sk_b return -ENOBUFS; } +static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = { + [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 }, + [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 }, + [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 }, + [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 }, + [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 }, +}; + +static int parse_txq_params(struct nlattr *tb[], + struct ieee80211_txq_params *txq_params) +{ + if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] || + !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] || + !tb[NL80211_TXQ_ATTR_AIFS]) + return -EINVAL; + + txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]); + txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]); + txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]); + txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]); + txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]); + + return 0; +} + static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev; - int result; - - if (!info->attrs[NL80211_ATTR_WIPHY_NAME]) - return -EINVAL; + int result = 0, rem_txq_params = 0; + struct nlattr *nl_txq_params; rdev = cfg80211_get_dev_from_info(info); if (IS_ERR(rdev)) return PTR_ERR(rdev); - result = cfg80211_dev_rename(rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME])); + if (info->attrs[NL80211_ATTR_WIPHY_NAME]) { + result = cfg80211_dev_rename( + rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME])); + if (result) + goto bad_res; + } + + if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) { + struct ieee80211_txq_params txq_params; + struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1]; + + nla_for_each_nested(nl_txq_params, + info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS], + rem_txq_params) { + nla_parse(tb, NL80211_TXQ_ATTR_MAX, + nla_data(nl_txq_params), + nla_len(nl_txq_params), + txq_params_policy); + result = parse_txq_params(tb, &txq_params); + if (result) + goto bad_res; + + if (!rdev->ops->set_txq_params) { + result = -EOPNOTSUPP; + goto bad_res; + } + + result = rdev->ops->set_txq_params(&rdev->wiphy, + &txq_params); + if (result) + goto bad_res; + } + } +bad_res: cfg80211_put_dev(rdev); return result; } -- -- Jouni Malinen PGP id EFC895FA