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Thu, 02 Apr 2026 21:51:44 -0700 (PDT) X-Received: by 2002:a05:6a20:7d8a:b0:398:9c94:2033 with SMTP id adf61e73a8af0-39f2ef837acmr1535077637.11.1775191904138; Thu, 02 Apr 2026 21:51:44 -0700 (PDT) Received: from [10.152.199.23] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82cf9b6113dsm4258227b3a.23.2026.04.02.21.51.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Apr 2026 21:51:43 -0700 (PDT) Message-ID: <8588fd02-55a2-482d-87f4-1db8e696bad0@oss.qualcomm.com> Date: Fri, 3 Apr 2026 10:21:40 +0530 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH ath-next] wifi: ath12k: Create symlink for each radio in a wiphy To: Roopni Devanathan , ath12k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Harshitha Prem References: <20260402051402.3903795-1-roopni.devanathan@oss.qualcomm.com> Content-Language: en-US From: Rameshkumar Sundaram In-Reply-To: <20260402051402.3903795-1-roopni.devanathan@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: GKONE5thS6jDCvdUcskvP8c2lgtYunBx X-Proofpoint-ORIG-GUID: GKONE5thS6jDCvdUcskvP8c2lgtYunBx X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDAzMDA0MCBTYWx0ZWRfXyzXzSNSU0TFO DX4+GmTCwEiO6oYR2oN+4Sm31uneOF/K7XrFFCVfVyELjCqaQVozhxa1SU13FaKQ48Hy4FoijI1 ba9Us/eYIR8XunthetNFKtHcYIUzdw2x6lR1s2djPKH6Y9B2f/2D8b7wmLyUpJw9DOmQ8QZ2Tx1 BkTSOXOwcHw9ZGQ6M725xmaee8myP2rdBIlX9rmzOu0c+EwD3tKOHAmL0AncxBRux9unRJKfOjf IHsayu46vqxWr76vZJJ7MalWaZKAmCfF86jXibs1a+87Yf8cSxjBn5R3mOqlzHjlejz5XVtuNxY e4g3p0CpvWhJ2C0+R6q57XS5oJEtwsdN9Hxp/shDM3n3wwd3tCHAEuttRPsOZdxFIk+rH1u01lv lqHnPIz3aHsvOB+A6afIo0zSL34FqRVzulHOItp5OgnvKCwGlKw+7wax3EUu3wlFAlJpeoHSq+q JQWKlGT2inzvTyA78ZA== X-Authority-Analysis: v=2.4 cv=HKXO14tv c=1 sm=1 tr=0 ts=69cf4761 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=lxJo2wgQVOyoRhA3UyYA:9 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-03_01,2026-04-02_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 adultscore=0 spamscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604030040 On 4/2/2026 10:44 AM, Roopni Devanathan wrote: > In single-wiphy design, when more than one radio is registered as a > single-wiphy in the mac80211 layer, the following warnings are seen: > > 1. debugfs: File 'ath12k' in directory 'phy0' already present! > 2. debugfs: File 'simulate_fw_crash' in directory 'pci-0000:57:00.0' already present! > debugfs: File 'device_dp_stats' in directory 'pci-01777777777777777777777:57:00.0' already present! > > When more than one radio is registered as a single-wiphy, symlinks for > all the radios are created in the same debugfs directory: > /sys/kernel/debug/ieee80211/phyX/ath12k, resulting in warning 1. When a > symlink is created for the first radio, since the 'ath12k' directory is > not present, it will be created and no warning will be thrown. But when > symlink is created for more than one radio, since the 'ath12k' > directory was already created for symlink for radio 1, a warning is > thrown complaining that 'ath12k' directory is already present. To resolve > warning 1, create symlink for each radio in separate debugfs directories. > For the first radio, the symlink will always be the 'ath12k' directory. > This ensures that the existing directory structure is retained for > single-wiphy and multi-wiphy architectures. In single-wiphy architecture > with multiple radios, create symlink in separate debugfs directories > introduced by mac80211. > > Existing debugfs directory in single-wiphy architecture: > /sys/kernel/debug/ieee80211/phyX/ath12k is a symlink to > /sys/kernel/debug/ath12k/pci-0001:01:00.0/macY > > Proposed debugfs directory in single-wiphy architecture with one radio: > /sys/kernel/debug/ieee80211/phyX/ath12k is a symlink to > /sys/kernel/debug/ath12k/pci-0001:01:00.0/mac0 > > Proposed debugfs directory in single-wiphy architecture with more than > one radio: > /sys/kernel/debug/ieee80211/phyX/radio0/ath12k is a symlink to > /sys/kernel/debug/ath12k/pci-0001:01:00.0/mac0 and > /sys/kernel/debug/ieee80211/phyX/radioY/ath12k is a symlink to > /sys/kernel/debug/ath12k/pci-0001:01:00.0/macY > > Where X is phy index and Y is radio index, seen in > 'iw phyX info | grep Idx'. Two symlinks for the first radio are to ensure > compatibility with the existing design. Add radio_idx inside ar, to track > the radio index in probing order. > > API ath12k_debugfs_pdev_create() that creates SoC entries is called more > than once when hardware group starts up, resulting in warning 2. To > resolve this warning, remove all other calls to this API and add one > inside the ath12k_core_pdev_create(). This API carries all pdev-specific > initializations and can conveniently hold a call to > ath12k_debugfs_pdev_create(). > > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1 > Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 > > Co-developed-by: Harshitha Prem > Signed-off-by: Harshitha Prem > Signed-off-by: Roopni Devanathan > --- > drivers/net/wireless/ath/ath12k/core.c | 4 ++-- > drivers/net/wireless/ath/ath12k/core.h | 2 ++ > drivers/net/wireless/ath/ath12k/debugfs.c | 29 +++++++++++++++++++---- > drivers/net/wireless/ath/ath12k/mac.c | 2 +- > 4 files changed, 29 insertions(+), 8 deletions(-) > > diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c > index c31c47fb5a73..2519e2400d58 100644 > --- a/drivers/net/wireless/ath/ath12k/core.c > +++ b/drivers/net/wireless/ath/ath12k/core.c > @@ -835,8 +835,6 @@ static int ath12k_core_soc_create(struct ath12k_base *ab) > goto err_qmi_deinit; > } > > - ath12k_debugfs_pdev_create(ab); > - > return 0; > > err_qmi_deinit: > @@ -869,6 +867,8 @@ static int ath12k_core_pdev_create(struct ath12k_base *ab) > goto err_dp_pdev_free; > } > > + ath12k_debugfs_pdev_create(ab); > + > return 0; > > err_dp_pdev_free: > diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h > index 59c193b24764..046249c8763e 100644 > --- a/drivers/net/wireless/ath/ath12k/core.h > +++ b/drivers/net/wireless/ath/ath12k/core.h > @@ -588,6 +588,7 @@ struct ath12k_dbg_htt_stats { > struct ath12k_debug { > struct dentry *debugfs_pdev; > struct dentry *debugfs_pdev_symlink; > + struct dentry *debugfs_pdev_symlink_default; > struct ath12k_dbg_htt_stats htt_stats; > enum wmi_halphy_ctrl_path_stats_id tpc_stats_type; > bool tpc_request; > @@ -673,6 +674,7 @@ struct ath12k { > u8 pdev_idx; > u8 lmac_id; > u8 hw_link_id; > + u8 radio_idx; > > struct completion peer_assoc_done; > struct completion peer_delete_done; > diff --git a/drivers/net/wireless/ath/ath12k/debugfs.c b/drivers/net/wireless/ath/ath12k/debugfs.c > index 358031fa14eb..8c81a1c22449 100644 > --- a/drivers/net/wireless/ath/ath12k/debugfs.c > +++ b/drivers/net/wireless/ath/ath12k/debugfs.c > @@ -1473,18 +1473,35 @@ void ath12k_debugfs_register(struct ath12k *ar) > { > struct ath12k_base *ab = ar->ab; > struct ieee80211_hw *hw = ar->ah->hw; > - char pdev_name[5]; > + struct ath12k_hw *ah = ath12k_hw_to_ah(hw); > + struct dentry *ath12k_fs; > char buf[100] = {}; > + char pdev_name[5]; > > scnprintf(pdev_name, sizeof(pdev_name), "%s%d", "mac", ar->pdev_idx); > > ar->debug.debugfs_pdev = debugfs_create_dir(pdev_name, ab->debugfs_soc); > > /* Create a symlink under ieee80211/phy* */ > - scnprintf(buf, sizeof(buf), "../../ath12k/%pd2", ar->debug.debugfs_pdev); > - ar->debug.debugfs_pdev_symlink = debugfs_create_symlink("ath12k", > - hw->wiphy->debugfsdir, > - buf); > + if (ar->radio_idx == 0) { > + scnprintf(buf, sizeof(buf), "../../ath12k/%pd2", > + ar->debug.debugfs_pdev); > + ath12k_fs = hw->wiphy->debugfsdir; > + > + /* symbolic link for compatibility */ > + ar->debug.debugfs_pdev_symlink_default = debugfs_create_symlink("ath12k", > + ath12k_fs, > + buf); > + } > + > + if (ah->num_radio > 1) { > + scnprintf(buf, sizeof(buf), "../../../ath12k/%pd2", > + ar->debug.debugfs_pdev); > + ath12k_fs = hw->wiphy->radio_cfg[ar->radio_idx].radio_debugfsdir; > + ar->debug.debugfs_pdev_symlink = debugfs_create_symlink("ath12k", > + ath12k_fs, > + buf); > + } > > if (ar->mac.sbands[NL80211_BAND_5GHZ].channels) { > debugfs_create_file("dfs_simulate_radar", 0200, > @@ -1513,7 +1530,9 @@ void ath12k_debugfs_unregister(struct ath12k *ar) > > /* Remove symlink under ieee80211/phy* */ > debugfs_remove(ar->debug.debugfs_pdev_symlink); > + debugfs_remove(ar->debug.debugfs_pdev_symlink_default); > debugfs_remove_recursive(ar->debug.debugfs_pdev); > ar->debug.debugfs_pdev_symlink = NULL; > + ar->debug.debugfs_pdev_symlink_default = NULL; > ar->debug.debugfs_pdev = NULL; > } > diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c > index 553ec28b6aaa..c2b747f1b9f5 100644 > --- a/drivers/net/wireless/ath/ath12k/mac.c > +++ b/drivers/net/wireless/ath/ath12k/mac.c > @@ -15065,6 +15065,7 @@ static struct ath12k_hw *ath12k_mac_hw_allocate(struct ath12k_hw_group *ag, > ar->hw_link_id = pdev->hw_link_id; > ar->pdev = pdev; > ar->pdev_idx = pdev_idx; > + ar->radio_idx = i; > pdev->ar = ar; > > ag->hw_links[ar->hw_link_id].device_id = ab->device_id; > @@ -15132,7 +15133,6 @@ int ath12k_mac_allocate(struct ath12k_hw_group *ag) > if (!ab) > continue; > > - ath12k_debugfs_pdev_create(ab); > ath12k_mac_set_device_defaults(ab); > total_radio += ab->num_radios; > } > > base-commit: 15551ababf6d4e857f2101366a0c3eaa86dd822c Reviewed-by: Rameshkumar Sundaram