Return-path: Received: from mx1.uni-rostock.de ([139.30.22.71]:59008 "EHLO mx1.uni-rostock.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752083AbdKUMX1 (ORCPT ); Tue, 21 Nov 2017 07:23:27 -0500 From: Benjamin Beichler To: CC: , Benjamin Beichler Subject: [PATCH v2 5/5] mac80211_hwsim: add hwsim_tx_rate_flags to netlink attributes Date: Tue, 21 Nov 2017 13:17:44 +0100 In-Reply-To: <20171121121744.23422-1-benjamin.beichler@uni-rostock.de> References: <20171121121744.23422-1-benjamin.beichler@uni-rostock.de> MIME-Version: 1.0 Content-Type: text/plain Message-ID: <94448222-535e-484a-8857-8f1fc865e18f@MAIL2.uni-rostock.de> (sfid-20171121_132334_481129_7D86F3C7) Sender: linux-wireless-owner@vger.kernel.org List-ID: For correct interpretation of a tx rate, the corresponding rate flags are needed (e.g. whether a HT-MCS rate or a legacy rate) and moreover for more correct simulation the other infos of the flags are important (like short-GI). Keeping compatibility, the flags are not integrated into the existing hwsim_tx_rate, but transmitted as an additional netlink attribute. Signed-off-by: Benjamin Beichler --- drivers/net/wireless/mac80211_hwsim.c | 41 +++++++++++++++++++++- drivers/net/wireless/mac80211_hwsim.h | 65 ++++++++++++++++++++++++++++++++++- 2 files changed, 104 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index 3d2b16822269..3689f863da8d 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -1022,6 +1022,36 @@ static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data, return res; } +static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate) +{ + u16 result = 0; + + if (rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) + result |= MAC80211_HWSIM_TX_RC_USE_RTS_CTS; + if (rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) + result |= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT; + if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) + result |= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE; + if (rate->flags & IEEE80211_TX_RC_MCS) + result |= MAC80211_HWSIM_TX_RC_MCS; + if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD) + result |= MAC80211_HWSIM_TX_RC_GREEN_FIELD; + if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + result |= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH; + if (rate->flags & IEEE80211_TX_RC_DUP_DATA) + result |= MAC80211_HWSIM_TX_RC_DUP_DATA; + if (rate->flags & IEEE80211_TX_RC_SHORT_GI) + result |= MAC80211_HWSIM_TX_RC_SHORT_GI; + if (rate->flags & IEEE80211_TX_RC_VHT_MCS) + result |= MAC80211_HWSIM_TX_RC_VHT_MCS; + if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) + result |= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH; + if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH) + result |= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH; + + return result; +} + static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw, struct sk_buff *my_skb, int dst_portid) @@ -1034,6 +1064,7 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw, unsigned int hwsim_flags = 0; int i; struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES]; + struct hwsim_tx_rate_flag tx_attempts_flags[IEEE80211_TX_MAX_RATES]; uintptr_t cookie; if (data->ps != PS_DISABLED) @@ -1085,7 +1116,11 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw, for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { tx_attempts[i].idx = info->status.rates[i].idx; + tx_attempts_flags[i].idx = info->status.rates[i].idx; tx_attempts[i].count = info->status.rates[i].count; + tx_attempts_flags[i].flags = + trans_tx_rate_flags_ieee2hwsim( + &info->status.rates[i]); } if (nla_put(skb, HWSIM_ATTR_TX_INFO, @@ -1093,6 +1128,11 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw, tx_attempts)) goto nla_put_failure; + if (nla_put(skb, HWSIM_ATTR_TX_INFO_FLAGS, + sizeof(struct hwsim_tx_rate_flag) * IEEE80211_TX_MAX_RATES, + tx_attempts_flags)) + goto nla_put_failure; + /* We create a cookie to identify this skb */ data->pending_cookie++; cookie = data->pending_cookie; @@ -2999,7 +3039,6 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2, for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { txi->status.rates[i].idx = tx_attempts[i].idx; txi->status.rates[i].count = tx_attempts[i].count; - /*txi->status.rates[i].flags = 0;*/ } txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]); diff --git a/drivers/net/wireless/mac80211_hwsim.h b/drivers/net/wireless/mac80211_hwsim.h index 7b2f1e9e66a8..7ef9aa18fb82 100644 --- a/drivers/net/wireless/mac80211_hwsim.h +++ b/drivers/net/wireless/mac80211_hwsim.h @@ -64,7 +64,8 @@ enum hwsim_tx_control_flags { * @HWSIM_CMD_TX_INFO_FRAME: Transmission info report from user space to * kernel, uses: * %HWSIM_ATTR_ADDR_TRANSMITTER, %HWSIM_ATTR_FLAGS, - * %HWSIM_ATTR_TX_INFO, %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE + * %HWSIM_ATTR_TX_INFO, %WSIM_ATTR_TX_INFO_FLAGS, + * %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE * @HWSIM_CMD_NEW_RADIO: create a new radio with the given parameters, * returns the radio ID (>= 0) or negative on errors, if successful * then multicast the result, uses optional parameter: @@ -181,4 +182,66 @@ struct hwsim_tx_rate { u8 count; } __packed; +/** + * enum hwsim_tx_rate_flags - per-rate flags set by the rate control algorithm. + * Inspired by structure mac80211_rate_control_flags. New flags may be + * appended, but old flags not deleted, to keep compatibility for + * userspace. + * + * These flags are set by the Rate control algorithm for each rate during tx, + * in the @flags member of struct ieee80211_tx_rate. + * + * @MAC80211_HWSIM_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. + * @MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. + * This is set if the current BSS requires ERP protection. + * @MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. + * @MAC80211_HWSIM_TX_RC_MCS: HT rate. + * @MAC80211_HWSIM_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is + * split into a higher 4 bits (Nss) and lower 4 bits (MCS number) + * @MAC80211_HWSIM_TX_RC_GREEN_FIELD: Indicates whether this rate should be used + * in Greenfield mode. + * @MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be + * 40 MHz. + * @MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission + * @MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission + * (80+80 isn't supported yet) + * @MAC80211_HWSIM_TX_RC_DUP_DATA: The frame should be transmitted on both of + * the adjacent 20 MHz channels, if the current channel type is + * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. + * @MAC80211_HWSIM_TX_RC_SHORT_GI: Short Guard interval should be used for this + * rate. + */ +enum hwsim_tx_rate_flags { + MAC80211_HWSIM_TX_RC_USE_RTS_CTS = BIT(0), + MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT = BIT(1), + MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE = BIT(2), + + /* rate index is an HT/VHT MCS instead of an index */ + MAC80211_HWSIM_TX_RC_MCS = BIT(3), + MAC80211_HWSIM_TX_RC_GREEN_FIELD = BIT(4), + MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH = BIT(5), + MAC80211_HWSIM_TX_RC_DUP_DATA = BIT(6), + MAC80211_HWSIM_TX_RC_SHORT_GI = BIT(7), + MAC80211_HWSIM_TX_RC_VHT_MCS = BIT(8), + MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH = BIT(9), + MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH = BIT(10), +}; + +/** + * struct hwsim_tx_rate - rate selection/status + * + * @idx: rate index to attempt to send with + * @count: number of tries in this rate before going to the next rate + * + * A value of -1 for @idx indicates an invalid rate and, if used + * in an array of retry rates, that no more rates should be tried. + * + * When used for transmit status reporting, the driver should + * always report the rate and number of retries used. + * + */ +struct hwsim_tx_rate_flag { + s8 idx; + u16 flags; +} __packed; #endif /* __MAC80211_HWSIM_H */ -- 2.15.0