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Tue, 27 May 2025 08:42:07 GMT Received: from hu-rajkbhag-blr.qualcomm.com (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Tue, 27 May 2025 01:42:05 -0700 From: Raj Kumar Bhagat Date: Tue, 27 May 2025 14:11:43 +0530 Subject: [PATCH wireless-next v2 1/3] wifi: cfg80211: Add utility API to get radio index from channel Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20250527-mlo-dfs-acs-v2-1-92c2f37c81d9@quicinc.com> References: <20250527-mlo-dfs-acs-v2-0-92c2f37c81d9@quicinc.com> In-Reply-To: <20250527-mlo-dfs-acs-v2-0-92c2f37c81d9@quicinc.com> To: Johannes Berg CC: , , Vasanthakumar Thiagarajan , "Raj Kumar Bhagat" X-Mailer: b4 0.14.2 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Authority-Analysis: v=2.4 cv=UOXdHDfy c=1 sm=1 tr=0 ts=68357ae0 cx=c_pps a=ouPCqIW2jiPt+lZRy3xVPw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=GEpy-HfZoHoA:10 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=EUspDBNiAAAA:8 a=COk6AnOGAAAA:8 a=QnIzrQ3vd9YidwGbO6EA:9 a=QEXdDO2ut3YA:10 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-ORIG-GUID: 9nChck4vcUDqiEdudOINcshBNdBGw_ZF X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTI3MDA3MCBTYWx0ZWRfXx5cre0XaKFDt 3Q5WnTt6p+0ACr0OscRxbtTItmBAYuYM0GFveY4z7tyCywzCI7bNLdmLMWH06ITO7tE4s7uu/Y6 F2ImFb5B2/spe2mwJ0kM7Od82WQChEFrjZPn4nQLDsjKf2PrHITPkX71NO5AiWGEIHSBEF20bja VXcTwJ64IOm0m6usAbYJBpGnoXg19HUIUoj5n62gS+7N/aU5TTbQMF+hB1bY4aVuITl0h7JZpnl ALzH7bMyoaQJId5f/63/p0ethSDNgdzcQR5qiGh5zx4yKuLqbapT22NJfJpCn6TuJg4+hHnz+LI 8SzRAAO84C2GzBTmZ7DExtP4hXOWM95y1WZHplqM0Hm/U7osPUwM2t3WCN0UFT/PTqoRSR42yw5 WaogqosMguKZ6n41y15ulTGUk/jOzMZtIGND+3Dz8g4BLeTyCbuaiHEjIMWK7PZGGhbPzPzq X-Proofpoint-GUID: 9nChck4vcUDqiEdudOINcshBNdBGw_ZF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-27_04,2025-05-26_02,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 mlxscore=0 adultscore=0 priorityscore=1501 mlxlogscore=999 bulkscore=0 malwarescore=0 impostorscore=0 spamscore=0 suspectscore=0 lowpriorityscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505160000 definitions=main-2505270070 From: Vasanthakumar Thiagarajan Add utility API cfg80211_get_radio_idx_by_chan() to retrieve the radio index corresponding to a given channel in a multi-radio wiphy. This utility function can be used when we want to check the radio-specific data for a channel in a multi-radio wiphy. For example, it can help determine the radio index required to handle a scan request. This index can then be used to decide whether the scan can proceed without interfering with ongoing DFS operations on another radio. Signed-off-by: Vasanthakumar Thiagarajan Co-developed-by: Raj Kumar Bhagat Signed-off-by: Raj Kumar Bhagat --- include/net/cfg80211.h | 11 +++++++++++ net/wireless/util.c | 24 ++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index d1848dc8ec99df36592517b46d58223be9bee7e5..7719a90ab4d75045983ac8a63360fd90472cbb7d 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -9372,6 +9372,17 @@ int cfg80211_iter_combinations(struct wiphy *wiphy, void (*iter)(const struct ieee80211_iface_combination *c, void *data), void *data); +/** + * cfg80211_get_radio_idx_by_chan - get the radio index by the channel + * + * @wiphy: the wiphy + * @chan: channel for which the supported radio index is required + * + * Return: radio index on success or a negative error code + */ +int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy, + const struct ieee80211_channel *chan); + /** * cfg80211_stop_iface - trigger interface disconnection diff --git a/net/wireless/util.c b/net/wireless/util.c index ed868c0f7ca8ed7a9e85e70c10a738f592eac1d6..e438f883f085b3aed0c0438d94957f08aa2c6688 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -2516,6 +2516,30 @@ int cfg80211_check_combinations(struct wiphy *wiphy, } EXPORT_SYMBOL(cfg80211_check_combinations); +int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy, + const struct ieee80211_channel *chan) +{ + const struct wiphy_radio *radio; + int i, j; + u32 freq; + + if (!chan) + return -EINVAL; + + freq = ieee80211_channel_to_khz(chan); + for (i = 0; i < wiphy->n_radio; i++) { + radio = &wiphy->radio[i]; + for (j = 0; j < radio->n_freq_range; j++) { + if (freq >= radio->freq_range[j].start_freq && + freq < radio->freq_range[j].end_freq) + return i; + } + } + + return -ENOENT; +} +EXPORT_SYMBOL(cfg80211_get_radio_idx_by_chan); + int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, const u8 *rates, unsigned int n_rates, u32 *mask)