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wifi: wfx: introduce hif_scan_uniq()

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Like hof_scan(), hif_scan_uniq() invoke HIF_SCAN. However, it only
allows to probe one channel and disable probe requests. It works very
well to implement Remain-On-Channel.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20231004172843.195332-5-jerome.pouiller@silabs.com
This commit is contained in:
Jérôme Pouiller 2023-10-04 19:28:39 +02:00 committed by Kalle Valo
parent cf0cc05c8c
commit fc5cb24fd5
2 changed files with 26 additions and 0 deletions
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25
drivers/net/wireless/silabs/wfx/hif_tx.c
View File

@ -238,6 +238,31 @@ int wfx_hif_write_mib(struct wfx_dev *wdev, int vif_id, u16 mib_id, void *val, s
return ret;
}
/* Hijack scan request to implement Remain-On-Channel */
int wfx_hif_scan_uniq(struct wfx_vif *wvif, struct ieee80211_channel *chan, int duration)
{
int ret;
struct wfx_hif_msg *hif;
size_t buf_len = sizeof(struct wfx_hif_req_start_scan_alt) + sizeof(u8);
struct wfx_hif_req_start_scan_alt *body = wfx_alloc_hif(buf_len, &hif);
if (!hif)
return -ENOMEM;
body->num_of_ssids = HIF_API_MAX_NB_SSIDS;
body->maintain_current_bss = 1;
body->disallow_ps = 1;
body->tx_power_level = cpu_to_le32(chan->max_power);
body->num_of_channels = 1;
body->channel_list[0] = chan->hw_value;
body->max_transmit_rate = API_RATE_INDEX_B_1MBPS;
body->min_channel_time = cpu_to_le32(duration);
body->max_channel_time = cpu_to_le32(duration * 110 / 100);
wfx_fill_header(hif, wvif->id, HIF_REQ_ID_START_SCAN, buf_len);
ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false);
kfree(hif);
return ret;
}
int wfx_hif_scan(struct wfx_vif *wvif, struct cfg80211_scan_request *req,
int chan_start_idx, int chan_num)
{

1
drivers/net/wireless/silabs/wfx/hif_tx.h
View File

@ -54,6 +54,7 @@ int wfx_hif_beacon_transmit(struct wfx_vif *wvif, bool enable);
int wfx_hif_update_ie_beacon(struct wfx_vif *wvif, const u8 *ies, size_t ies_len);
int wfx_hif_scan(struct wfx_vif *wvif, struct cfg80211_scan_request *req80211,
int chan_start, int chan_num);
int wfx_hif_scan_uniq(struct wfx_vif *wvif, struct ieee80211_channel *chan, int duration);
int wfx_hif_stop_scan(struct wfx_vif *wvif);
int wfx_hif_configuration(struct wfx_dev *wdev, const u8 *conf, size_t len);
int wfx_hif_shutdown(struct wfx_dev *wdev);