From patchwork Tue May 28 09:18:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13676367 X-Patchwork-Delegate: kvalo@adurom.com Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6222E13F45F; Tue, 28 May 2024 09:18:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716887894; cv=none; b=QjMIZi0iQzj1b8ni2oTdEcVKqOVxJ317vobRX184mMeuH5tqOh0jJrllo9s2b/Kqodp8RMzF5kO2uiq7hPA5x6G1GKHrU7LILHqn1qqVWPlaRRe3cTS/mwbN8hjB1eEEisZOiVHEizXwDu0HirGXaazc3Y1qzLDkLVQ2XjgExTw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716887894; c=relaxed/simple; bh=kU7Tlob7aqdGJVIIlB2bJ3z2njJBaj2p/U8Kna4zyH4=; h=In-Reply-To:References:From:To:Cc:Subject:MIME-Version: Content-Disposition:Content-Type:Message-Id:Date; b=NoYjLgKhx4OXZLxuvsjDCRT8/khLAKu1Icda6HzjLuizsyV6iDg+yniZ/TS5r13NJZ50YuIVNwTqKkN0zK/ub/aYG2O10+aT5tnDTB3+Dny0XUXG1Y95pZWRRlw65963wuOchHbK+epSH3Bo8vlPyvpIZfvkquJ9IyTpRR5xI80= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=G46LM79b; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="G46LM79b" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=HuHTw1gCK5bIqEGyLd+i4Kr0r9K90c+aiGJ17Pw8vbU=; b=G46LM79b8M0SP5b+iCpqhb5V7B A2WAZcJT6h6PibIaAF2k9PAN1xtw7Hu2YYb6pRGG/QzUiBSXW5v4w8ee0dHHRni/0E8OAtCI5xQ/T tlrP2ur1oZ6LCx9V584NEhZ9Y/Fxl+Fb4fxa/B7DAaN8edsAF4giYneMYeGYik5JKUYdxoek9P9fs mVjOGCfw3HQF4XUTXIgiEgP9Gx0Aipkhe0GWpKxMbPv1uGSvJkyUNN8VVFEWlOIhJ4p4k/1APQkqG L5OaM1gP8bo3Z2bh1rYOcsjRoGosxgDvMNF+rWMjQw/JB0zJXZyPT/MTvnBR6NDcA3iFKCazmdSac 6cyLXfbA==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:43036 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sBsy5-0004YI-0I; Tue, 28 May 2024 10:18:05 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1sBsy7-00E8vu-Nc; Tue, 28 May 2024 10:18:07 +0100 In-Reply-To: References: From: "Russell King (Oracle)" To: Kalle Valo Cc: Johannes Berg , Michael Nemanov , linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org Subject: [PATCH wireless-next 6/8] wifi: wlcore: add pn16 support Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Tue, 28 May 2024 10:18:07 +0100 TI Wl18xx firmware adds a "pn16" field for AES and TKIP keys as per their patch: https://git.ti.com/cgit/wilink8-wlan/build-utilites/tree/patches/kernel_patches/4.19.38/0023-wlcore-Fixing-PN-drift-on-encrypted-link-after-recov.patch?h=r8.9&id=a2ee50aa5190ed3b334373d6cd09b1bff56ffcf7 Add support for this, but rather than requiring the field to be present (which would break existing firmwares), make it optional. Signed-off-by: Russell King (Oracle) --- drivers/net/wireless/ti/wlcore/cmd.c | 9 +++ drivers/net/wireless/ti/wlcore/main.c | 89 +++++++++++++++++++++-- drivers/net/wireless/ti/wlcore/wlcore_i.h | 4 + 3 files changed, 97 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/ti/wlcore/cmd.c b/drivers/net/wireless/ti/wlcore/cmd.c index a939fd89a7f5..0d1fcdca3869 100644 --- a/drivers/net/wireless/ti/wlcore/cmd.c +++ b/drivers/net/wireless/ti/wlcore/cmd.c @@ -332,6 +332,14 @@ int wl12xx_allocate_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid) wl->fw_status->counters.tx_lnk_free_pkts[link]; wl->links[link].wlvif = wlvif; + /* + * Take the last sec_pn16 value from the current FW status. On recovery, + * we might not have fw_status yet, and tx_lnk_sec_pn16[] will be NULL. + */ + if (wl->fw_status->counters.tx_lnk_sec_pn16) + wl->links[link].prev_sec_pn16 = + le16_to_cpu(wl->fw_status->counters.tx_lnk_sec_pn16[link]); + /* * Take saved value for total freed packets from wlvif, in case this is * recovery/resume @@ -360,6 +368,7 @@ void wl12xx_free_link(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 *hlid) wl->links[*hlid].allocated_pkts = 0; wl->links[*hlid].prev_freed_pkts = 0; + wl->links[*hlid].prev_sec_pn16 = 0; wl->links[*hlid].ba_bitmap = 0; eth_zero_addr(wl->links[*hlid].addr); diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c index 8f82666f379c..35d1114a28aa 100644 --- a/drivers/net/wireless/ti/wlcore/main.c +++ b/drivers/net/wireless/ti/wlcore/main.c @@ -379,6 +379,8 @@ static void wl12xx_irq_update_links_status(struct wl1271 *wl, static int wlcore_fw_status(struct wl1271 *wl, struct wl_fw_status *status) { + struct wl12xx_vif *wlvifsta; + struct wl12xx_vif *wlvifap; struct wl12xx_vif *wlvif; u32 old_tx_blk_count = wl->tx_blocks_available; int avail, freed_blocks; @@ -410,23 +412,100 @@ static int wlcore_fw_status(struct wl1271 *wl, struct wl_fw_status *status) wl->tx_pkts_freed[i] = status->counters.tx_released_pkts[i]; } + /* Find an authorized STA vif */ + wlvifsta = NULL; + wl12xx_for_each_wlvif_sta(wl, wlvif) { + if (wlvif->sta.hlid != WL12XX_INVALID_LINK_ID && + test_bit(WLVIF_FLAG_STA_AUTHORIZED, &wlvif->flags)) { + wlvifsta = wlvif; + break; + } + } + + /* Find a started AP vif */ + wlvifap = NULL; + wl12xx_for_each_wlvif(wl, wlvif) { + if (wlvif->bss_type == BSS_TYPE_AP_BSS && + wlvif->inconn_count == 0 && + test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags)) { + wlvifap = wlvif; + break; + } + } for_each_set_bit(i, wl->links_map, wl->num_links) { + u16 diff16, sec_pn16; u8 diff, tx_lnk_free_pkts; + lnk = &wl->links[i]; /* prevent wrap-around in freed-packets counter */ tx_lnk_free_pkts = status->counters.tx_lnk_free_pkts[i]; diff = (tx_lnk_free_pkts - lnk->prev_freed_pkts) & 0xff; - if (diff == 0) + if (diff) { + lnk->allocated_pkts -= diff; + lnk->prev_freed_pkts = tx_lnk_free_pkts; + } + + /* Get the current sec_pn16 value if present */ + if (status->counters.tx_lnk_sec_pn16) + sec_pn16 = __le16_to_cpu(status->counters.tx_lnk_sec_pn16[i]); + else + sec_pn16 = 0; + /* prevent wrap-around in pn16 counter */ + diff16 = (sec_pn16 - lnk->prev_sec_pn16) & 0xffff; + + /* FIXME: since free_pkts is a 8-bit counter of packets that + * rolls over, it can become zero. If it is zero, then we + * omit processing below. Is that really correct? + */ + if (tx_lnk_free_pkts <= 0) continue; - lnk->allocated_pkts -= diff; - lnk->prev_freed_pkts = tx_lnk_free_pkts; + /* For a station that has an authorized link: */ + if (wlvifsta && wlvifsta->sta.hlid == i) { + if (wlvifsta->encryption_type == KEY_TKIP || + wlvifsta->encryption_type == KEY_AES) { + if (diff16) { + lnk->prev_sec_pn16 = sec_pn16; + /* accumulate the prev_freed_pkts + * counter according to the PN from + * firmware + */ + lnk->total_freed_pkts += diff16; + } + } else { + if (diff) + /* accumulate the prev_freed_pkts + * counter according to the free packets + * count from firmware + */ + lnk->total_freed_pkts += diff; + } + } - /* accumulate the prev_freed_pkts counter */ - lnk->total_freed_pkts += diff; + /* For an AP that has been started */ + if (wlvifap && test_bit(i, wlvifap->ap.sta_hlid_map)) { + if (wlvifap->encryption_type == KEY_TKIP || + wlvifap->encryption_type == KEY_AES) { + if (diff16) { + lnk->prev_sec_pn16 = sec_pn16; + /* accumulate the prev_freed_pkts + * counter according to the PN from + * firmware + */ + lnk->total_freed_pkts += diff16; + } + } else { + if (diff) + /* accumulate the prev_freed_pkts + * counter according to the free packets + * count from firmware + */ + lnk->total_freed_pkts += diff; + } + } } /* prevent wrap-around in total blocks counter */ diff --git a/drivers/net/wireless/ti/wlcore/wlcore_i.h b/drivers/net/wireless/ti/wlcore/wlcore_i.h index eefae3f867b9..5fbed64302f1 100644 --- a/drivers/net/wireless/ti/wlcore/wlcore_i.h +++ b/drivers/net/wireless/ti/wlcore/wlcore_i.h @@ -151,6 +151,9 @@ struct wl_fw_status { */ u8 *tx_lnk_free_pkts; + /* PN16 of last TKIP/AES seq-num per HLID */ + __le16 *tx_lnk_sec_pn16; + /* Cumulative counter of released Voice memory blocks */ u8 tx_voice_released_blks; @@ -259,6 +262,7 @@ struct wl1271_link { /* accounting for allocated / freed packets in FW */ u8 allocated_pkts; u8 prev_freed_pkts; + u16 prev_sec_pn16; u8 addr[ETH_ALEN];