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+ Mon, 10 Mar 2025 06:28:45 -0700 (PDT)
+From: Mantas Pucka <mantas@8devices.com>
+Date: Mon, 10 Mar 2025 15:28:18 +0200
+Subject: [PATCH ath-next] wifi: ath12k: limit WMI_SCAN_CHAN_LIST_CMDID
+ argument size
+Precedence: bulk
+X-Mailing-List: linux-wireless@vger.kernel.org
+List-Id: <linux-wireless.vger.kernel.org>
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+Message-Id: <20250310-limit-wmi-chanlist-v1-1-8f0fb45459a7@8devices.com>
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+ 5mXC8px3ZuLCTI1J/XTfUqQSebgAAAA==
+X-Change-ID: 20250310-limit-wmi-chanlist-17cb8d27cba6
+To: ath12k@lists.infradead.org
+Cc: Johannes Berg <johannes@sipsolutions.net>,
+ Jeff Johnson <jjohnson@kernel.org>, linux-wireless@vger.kernel.org,
+ linux-kernel@vger.kernel.org, Mantas Pucka <mantas@8devices.com>
+X-Mailer: b4 0.14.2
+
+When using BDF with both 5GHz and 6GHz bands enabled on QCN9274, interface
+fails to start. It happens because FW fails to process
+WMI_SCAN_CHAN_LIST_CMDID with argument size >2048, resulting in a command
+timeout. The current code allows splitting channel list across multiple WMI
+commands but uses WMI max_msg_len (4096) as chunk size, which is still too
+large.
+
+Fix this by limiting the number of channels sent at once, using the value
+specified in WMI interface description [1].
+
+[1] https://git.codelinaro.org/clo/qsdk/platform/vendor/qcom-opensource/wlan/fw-api/-/blob/NHSS.QSDK.13.0.0.6/fw/wmi_unified.h#L6459
+
+Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
+
+Signed-off-by: Mantas Pucka <mantas@8devices.com>
+---
+ drivers/net/wireless/ath/ath12k/wmi.c | 3 +++
+ drivers/net/wireless/ath/ath12k/wmi.h | 2 ++
+ 2 files changed, 5 insertions(+)
+
+
+---
+base-commit: 42aa76e608ca845c98e79f9e23af0bdb07b2eb1d
+change-id: 20250310-limit-wmi-chanlist-17cb8d27cba6
+
+Best regards,
+
+--- a/drivers/net/wireless/ath/ath12k/wmi.c
++++ b/drivers/net/wireless/ath/ath12k/wmi.c
+@@ -2558,6 +2558,9 @@ int ath12k_wmi_send_scan_chan_list_cmd(s
+ max_chan_limit = (wmi->wmi_ab->max_msg_len[ar->pdev_idx] - len) /
+ sizeof(*chan_info);
+
++ if (max_chan_limit > WMI_MAX_NUM_CHAN_PER_WMI_CMD)
++ max_chan_limit = WMI_MAX_NUM_CHAN_PER_WMI_CMD;
++
+ num_send_chans = min(arg->nallchans, max_chan_limit);
+
+ arg->nallchans -= num_send_chans;
+--- a/drivers/net/wireless/ath/ath12k/wmi.h
++++ b/drivers/net/wireless/ath/ath12k/wmi.h
+@@ -3743,6 +3743,8 @@ struct wmi_stop_scan_cmd {
+ __le32 pdev_id;
+ } __packed;
+
++#define WMI_MAX_NUM_CHAN_PER_WMI_CMD 58
++
+ struct ath12k_wmi_scan_chan_list_arg {
+ u32 pdev_id;
+ u16 nallchans;
--- /dev/null
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+From: Mantas Pucka <mantas@8devices.com>
+Date: Thu, 13 Mar 2025 11:00:56 +0200
+Subject: [PATCH] wifi: ath12k: fix 5GHz operation on wideband QCN9274
+ radios
+Precedence: bulk
+X-Mailing-List: linux-wireless@vger.kernel.org
+List-Id: <linux-wireless.vger.kernel.org>
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+X-Change-ID: 20250313-ath12-wideband-caps-24b281788dfe
+To: ath12k@lists.infradead.org
+Cc: Johannes Berg <johannes@sipsolutions.net>,
+ Jeff Johnson <jjohnson@kernel.org>, linux-wireless@vger.kernel.org,
+ linux-kernel@vger.kernel.org, Mantas Pucka <mantas@8devices.com>
+X-Mailer: b4 0.14.2
+
+Currently ath12k_mac_setup_ht_vht_cap() incorrectly assumes that QCN9274
+radios with 6GHz band can't support 5GHz as well. This prevents the
+addition of HT and VHT capabilities for the 5GHz band. Since QCN9274 is
+capable of operating in multiple bands, remove the 6GHz support check and
+exception for single_pdev_only (i.e. WCN7850).
+
+Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
+
+Signed-off-by: Mantas Pucka <mantas@8devices.com>
+---
+ drivers/net/wireless/ath/ath12k/mac.c | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+
+---
+base-commit: 42aa76e608ca845c98e79f9e23af0bdb07b2eb1d
+change-id: 20250313-ath12-wideband-caps-24b281788dfe
+
+Best regards,
+
+--- a/drivers/net/wireless/ath/ath12k/mac.c
++++ b/drivers/net/wireless/ath/ath12k/mac.c
+@@ -5185,9 +5185,7 @@ static void ath12k_mac_setup_ht_vht_cap(
+ rate_cap_rx_chainmask);
+ }
+
+- if (cap->supported_bands & WMI_HOST_WLAN_5G_CAP &&
+- (ar->ab->hw_params->single_pdev_only ||
+- !ar->supports_6ghz)) {
++ if (cap->supported_bands & WMI_HOST_WLAN_5G_CAP) {
+ band = &ar->mac.sbands[NL80211_BAND_5GHZ];
+ ht_cap = cap->band[NL80211_BAND_5GHZ].ht_cap_info;
+ if (ht_cap_info)
projects / openwrt / staging / blocktrron.git / commitdiff