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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3339af25062sm47841297eec.16.2026.09.07.13.34.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2026 13:34:14 -0700 (PDT) From: Pooventhiran G Date: Tue, 08 Sep 2026 01:59:25 +0530 Subject: [PATCH wireless-next 16/18] wifi: mac80211: Add mac80211 support to handle NL80211_CMD_SET_SMD_CTX Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260908-smd-v1-16-65ad4ab30fbd@oss.qualcomm.com> References: <20260908-smd-v1-0-65ad4ab30fbd@oss.qualcomm.com> In-Reply-To: <20260908-smd-v1-0-65ad4ab30fbd@oss.qualcomm.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Johannes Berg Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, Pooventhiran G X-Mailer: b4 0.14.3 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA3MDIyNiBTYWx0ZWRfX5ASwzAq9Y93v 2FSwGWxzPg+o592O69ZJBmeg4lLUBvMT4AhkzCfAkB23hcgZhUC9FAFNTcDikahttD+cpinPdb2 Y3vFWTo+VXdlqls252h+PflyTxFm4Rr4oo7EZCGyodc7ZOAU1SLvMAbvdZ4ckuPV2KDoFWbwHwL 6DvGuftap1CBD1tzGnOVA8b4wglCQgiYGbBb3T7oId2AJjGEYjYeJMHFB+WYhcO/hWsG4NlBJhI l8hQNu00SxdaXsLRWRDHL8GTfJs5gnTTaLx2Cwy736GuSMZulqAgv/W4zvqqh26yHwlyxq5UMJy HApl9PRsunpUQ5pDd12Vzm4eGjiu7V3BmB4zmUg//jKsErcz9aMzg89O6tIz6ZEtAhSi4dJ2Xrg IbBpcf0cnj3tb4yc4NknzKRe86qJpAEe25Z/yX1yAW1AKlBuvJiQVmhwCK063B4tc2CUMsOMorS Ni+YaqIgoGcd5XmfjAA== X-Authority-Analysis: v=2.4 cv=MrJiLWae c=1 sm=1 tr=0 ts=6a9f1fc8 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=zHDNONmbSdC_GOYWSZkA:9 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 X-Proofpoint-ORIG-GUID: cgoR-zD0Sz15nNrLspNBHNp7RMj55eRu X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA3MDIyNiBTYWx0ZWRfX8o9990GPCo8K nF2uhLwOKqbK+cOKdiadjh7TQXFIwwFi/y7oGQPayaSbCmMfmW8LeeXLTCScp3ZNoAwFfmArups vPhI4vJir3V2cpaL2zgvgGLcZGqurOE= X-Proofpoint-GUID: cgoR-zD0Sz15nNrLspNBHNp7RMj55eRu X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-07_05,2026-09-07_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 malwarescore=0 phishscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 suspectscore=0 adultscore=0 bulkscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609070226 cfg80211 accepts NL80211_CMD_SET_SMD_CTX on the target AP MLD for userspace to be able to program the station's dynamic context on the TX and RX queues. Add mac80211 support to handle NL80211_CMD_SET_SMD_CTX in the driver and lower layers so that the context is installed and the target AP MLD is ready to continue data transfer with the non-AP MLD from where it may have left off at the current AP MLD. This enables the seamless roaming facilitation of the SMD BSS Transition procedure. Signed-off-by: Pooventhiran G --- include/net/mac80211.h | 5 +++++ net/mac80211/cfg.c | 24 +++++++++++++++++++++++ net/mac80211/driver-ops.h | 24 +++++++++++++++++++++++ net/mac80211/trace.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 102 insertions(+) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index b4b1d3db9b19..e0e13f0ed31f 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -4780,6 +4780,8 @@ enum ieee80211_sta_smd_state { * @sta_smd_state: Notifies low level driver about IEEE 802.11bn SMD substate * transition of a station. It must not fail while transitioning down. * The callback can sleep. + * @set_smd_ctx: Set the UHR SMD context for the non-AP MLD. This is used on + * the target AP MLD side to program dynamic context. */ struct ieee80211_ops { void (*tx)(struct ieee80211_hw *hw, @@ -5186,6 +5188,9 @@ struct ieee80211_ops { struct ieee80211_sta *sta, enum ieee80211_sta_smd_state old_state, enum ieee80211_sta_smd_state new_state); + int (*set_smd_ctx)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct cfg80211_smd_transition_info *st_info); }; /** diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 0ea8b610a771..268d5f42293a 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -6081,6 +6081,29 @@ ieee80211_set_peer_nan_sched(struct wiphy *wiphy, return ieee80211_nan_set_peer_sched(sdata, sched); } +static int ieee80211_set_smd_ctx(struct wiphy *wiphy, struct wireless_dev *wdev, + const u8 *addr, + struct cfg80211_smd_transition_info *st_info) +{ + struct ieee80211_local *local = wiphy_priv(wiphy); + struct ieee80211_sub_if_data *sdata; + struct sta_info *sta; + + lockdep_assert_wiphy(wiphy); + + sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); + + if (sdata->vif.type != NL80211_IFTYPE_AP && + sdata->vif.type != NL80211_IFTYPE_AP_VLAN) + return -EOPNOTSUPP; + + sta = sta_info_get_bss(sdata, addr); + if (!sta || !sta->sta.smd_params.smd_sta) + return -EINVAL; + + return drv_set_smd_ctx(local, sdata, &sta->sta, st_info); +} + const struct cfg80211_ops mac80211_config_ops = { .add_virtual_intf = ieee80211_add_iface, .del_virtual_intf = ieee80211_del_iface, @@ -6199,4 +6222,5 @@ const struct cfg80211_ops mac80211_config_ops = { .set_epcs = ieee80211_set_epcs, .nan_set_local_sched = ieee80211_set_local_nan_sched, .nan_set_peer_sched = ieee80211_set_peer_nan_sched, + .set_smd_ctx = ieee80211_set_smd_ctx, }; diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index ce11a723ec36..e764dd394de2 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -1820,4 +1820,28 @@ int drv_sta_smd_state(struct ieee80211_local *local, enum ieee80211_sta_smd_state old_state, enum ieee80211_sta_smd_state new_state); +static inline int drv_set_smd_ctx(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata, + struct ieee80211_sta *sta, + struct cfg80211_smd_transition_info *st_info) +{ + int ret; + + if (!local->ops->set_smd_ctx) + return -EOPNOTSUPP; + + sdata = get_bss_sdata(sdata); + + lockdep_assert_wiphy(local->hw.wiphy); + + if (!check_sdata_in_driver(sdata)) + return -EIO; + + trace_drv_set_smd_ctx(local, sdata, sta, st_info); + ret = local->ops->set_smd_ctx(&local->hw, &sdata->vif, sta, st_info); + trace_drv_return_int(local, ret); + + return ret; +} + #endif /* __MAC80211_DRIVER_OPS */ diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h index 63838a6d5d07..7aba79e441cf 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -3438,6 +3438,55 @@ TRACE_EVENT(drv_sta_smd_state, ) ); +TRACE_EVENT(drv_set_smd_ctx, + TP_PROTO(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata, + struct ieee80211_sta *sta, + struct cfg80211_smd_transition_info *st_info), + + TP_ARGS(local, sdata, sta, st_info), + + TP_STRUCT__entry( + LOCAL_ENTRY + VIF_ENTRY + STA_ENTRY + __field(u8, st_type) + __field(unsigned int, num_tids) + __dynamic_array(unsigned long, dl_tid_bitmap, + BITS_TO_LONGS(IEEE80211_SMD_CTX_NUM_TIDS)) + __dynamic_array(unsigned long, ul_tid_bitmap, + BITS_TO_LONGS(IEEE80211_SMD_CTX_NUM_TIDS)) + ), + + TP_fast_assign( + struct ieee80211_smd_ctx *ctx = st_info->ctx; + unsigned long sz; + + LOCAL_ASSIGN; + VIF_ASSIGN; + STA_ASSIGN; + __entry->st_type = st_info->type; + + __entry->num_tids = IEEE80211_SMD_CTX_NUM_TIDS; + sz = BITS_TO_LONGS(__entry->num_tids) * sizeof(unsigned long); + + memcpy(__get_dynamic_array(dl_tid_bitmap), + ctx->dl.valid_tid_bmap, sz); + memcpy(__get_dynamic_array(ul_tid_bitmap), + ctx->ul.valid_tid_bmap, sz); + ), + + TP_printk(LOCAL_PR_FMT VIF_PR_FMT STA_PR_FMT + ", ST type=%u DL TIDs: %*pb, UL TIDs: %*pb", + LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, + __entry->st_type, + __entry->num_tids, + (unsigned long *)__get_dynamic_array(dl_tid_bitmap), + __entry->num_tids, + (unsigned long *)__get_dynamic_array(ul_tid_bitmap) + ) +); + #endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */ #undef TRACE_INCLUDE_PATH -- 2.34.1