diff options
Diffstat (limited to 'package/kernel/mac80211/patches/ath11k/0049-wifi-ath11k-Optimize-6-GHz-scan-time.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/ath11k/0049-wifi-ath11k-Optimize-6-GHz-scan-time.patch | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath11k/0049-wifi-ath11k-Optimize-6-GHz-scan-time.patch b/package/kernel/mac80211/patches/ath11k/0049-wifi-ath11k-Optimize-6-GHz-scan-time.patch new file mode 100644 index 0000000000..f468990feb --- /dev/null +++ b/package/kernel/mac80211/patches/ath11k/0049-wifi-ath11k-Optimize-6-GHz-scan-time.patch @@ -0,0 +1,101 @@ +From 8b4d2f080afbd4280ecca0f4b3ceea943a7a86d0 Mon Sep 17 00:00:00 2001 +From: Manikanta Pubbisetty <quic_mpubbise@quicinc.com> +Date: Thu, 23 Mar 2023 11:39:13 +0530 +Subject: [PATCH] wifi: ath11k: Optimize 6 GHz scan time + +Currently, time taken to scan all supported channels on WCN6750 +is ~8 seconds and connection time is almost 10 seconds. WCN6750 +supports three Wi-Fi bands (i.e., 2.4/5/6 GHz) and the numbers of +channels for scan come around ~100 channels (default case). +Since the chip doesn't have support for DBS (Dual Band Simultaneous), +scans cannot be parallelized resulting in longer scan times. + +Among the 100 odd channels, ~60 channels are in 6 GHz band. Therefore, +optimizing the scan for 6 GHz channels will bring down the overall +scan time. + +WCN6750 firmware has support to scan a 6 GHz channel based on co-located +AP information i.e., RNR IE which is found in the legacy 2.4/5 GHz scan +results. When a scan request with all supported channel list is enqueued +to the firmware, then based on WMI_SCAN_CHAN_FLAG_SCAN_ONLY_IF_RNR_FOUND +scan channel flag, firmware will scan only those 6 GHz channels for which +RNR IEs are found in the legacy scan results. + +In the proposed design, based on NL80211_SCAN_FLAG_COLOCATED_6GHZ scan +flag, driver will set the WMI_SCAN_CHAN_FLAG_SCAN_ONLY_IF_RNR_FOUND flag +for non-PSC channels. Since there is high probability to find 6 GHz APs +on PSC channels, these channels are always scanned. Only non-PSC channels +are selectively scanned based on cached RNR information from the legacy +scan results. + +If NL80211_SCAN_FLAG_COLOCATED_6GHZ is not set in the scan flags, +then scan will happen on all supported channels (default behavior). + +With these optimizations, scan time is improved by 1.5-1.8 seconds on +WCN6750. Similar savings have been observed on WCN6855. + +Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1 +Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.16 + +Signed-off-by: Manikanta Pubbisetty <quic_mpubbise@quicinc.com> +Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> +Link: https://lore.kernel.org/r/20230323060913.10097-1-quic_mpubbise@quicinc.com +--- + drivers/net/wireless/ath/ath11k/mac.c | 25 +++++++++++++++++++++++-- + drivers/net/wireless/ath/ath11k/wmi.h | 4 ++++ + 2 files changed, 27 insertions(+), 2 deletions(-) + +--- a/drivers/net/wireless/ath/ath11k/mac.c ++++ b/drivers/net/wireless/ath/ath11k/mac.c +@@ -3819,8 +3819,29 @@ static int ath11k_mac_op_hw_scan(struct + goto exit; + } + +- for (i = 0; i < arg->num_chan; i++) +- arg->chan_list[i] = req->channels[i]->center_freq; ++ for (i = 0; i < arg->num_chan; i++) { ++ if (test_bit(WMI_TLV_SERVICE_SCAN_CONFIG_PER_CHANNEL, ++ ar->ab->wmi_ab.svc_map)) { ++ arg->chan_list[i] = ++ u32_encode_bits(req->channels[i]->center_freq, ++ WMI_SCAN_CONFIG_PER_CHANNEL_MASK); ++ ++ /* If NL80211_SCAN_FLAG_COLOCATED_6GHZ is set in scan ++ * flags, then scan all PSC channels in 6 GHz band and ++ * those non-PSC channels where RNR IE is found during ++ * the legacy 2.4/5 GHz scan. ++ * If NL80211_SCAN_FLAG_COLOCATED_6GHZ is not set, ++ * then all channels in 6 GHz will be scanned. ++ */ ++ if (req->channels[i]->band == NL80211_BAND_6GHZ && ++ req->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ && ++ !cfg80211_channel_is_psc(req->channels[i])) ++ arg->chan_list[i] |= ++ WMI_SCAN_CH_FLAG_SCAN_ONLY_IF_RNR_FOUND; ++ } else { ++ arg->chan_list[i] = req->channels[i]->center_freq; ++ } ++ } + } + + if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) { +--- a/drivers/net/wireless/ath/ath11k/wmi.h ++++ b/drivers/net/wireless/ath/ath11k/wmi.h +@@ -2100,6 +2100,7 @@ enum wmi_tlv_service { + + /* The second 128 bits */ + WMI_MAX_EXT_SERVICE = 256, ++ WMI_TLV_SERVICE_SCAN_CONFIG_PER_CHANNEL = 265, + WMI_TLV_SERVICE_REG_CC_EXT_EVENT_SUPPORT = 281, + WMI_TLV_SERVICE_BIOS_SAR_SUPPORT = 326, + +@@ -3249,6 +3250,9 @@ struct wmi_start_scan_cmd { + #define WMI_SCAN_DWELL_MODE_SHIFT 21 + #define WMI_SCAN_FLAG_EXT_PASSIVE_SCAN_START_TIME_ENHANCE 0x00000800 + ++#define WMI_SCAN_CONFIG_PER_CHANNEL_MASK GENMASK(19, 0) ++#define WMI_SCAN_CH_FLAG_SCAN_ONLY_IF_RNR_FOUND BIT(20) ++ + enum { + WMI_SCAN_DWELL_MODE_DEFAULT = 0, + WMI_SCAN_DWELL_MODE_CONSERVATIVE = 1, |