From patchwork Fri Jul 8 13:37:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 588895 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51CEBC433EF for ; Fri, 8 Jul 2022 13:37:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238260AbiGHNhU (ORCPT ); Fri, 8 Jul 2022 09:37:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238253AbiGHNhT (ORCPT ); Fri, 8 Jul 2022 09:37:19 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id BEAB01D312 for ; Fri, 8 Jul 2022 06:37:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1657287437; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=fiqEigVON0EX2+Io7XzvpJmaokF5cBbC+Hrru1BMVcY=; b=djvWctXGeyneMG5TBfrzKCEg/2+gh+hK0q2Z0Di/S0PxyMVBkzRtH2BiLtDIvrNK3ciFAA amBcdQnc/x+I0SDDNM2XwhoH9/9Cjop4TYLS0gVCAgl/hR2z4jDtdcrqvKppTwdp5fxWzM vK/g6jpRUzQVYzPXtFO+2wP+g3CuxBw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-31-oMFdYRm4P9e5eQFW_dhIFg-1; Fri, 08 Jul 2022 09:37:14 -0400 X-MC-Unique: oMFdYRm4P9e5eQFW_dhIFg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3F894101A59D; Fri, 8 Jul 2022 13:37:14 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.193.188]) by smtp.corp.redhat.com (Postfix) with ESMTP id D89F6404C324; Fri, 8 Jul 2022 13:37:12 +0000 (UTC) From: Hans de Goede To: Arend van Spriel , Franky Lin , Hante Meuleman , Kalle Valo Cc: Hans de Goede , linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, SHA-cyfmac-dev-list@infineon.com Subject: [PATCH 1/2] brcmfmac: Add brcmf_c_set_cur_etheraddr() helper Date: Fri, 8 Jul 2022 15:37:11 +0200 Message-Id: <20220708133712.102179-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Add a little helper to send "cur_etheraddr" commands to the interface and to handle the error reporting of it in a single place. Signed-off-by: Hans de Goede Reviewed-by: Arend van Spriel --- .../broadcom/brcm80211/brcmfmac/common.c | 18 +++++++++++++----- .../broadcom/brcm80211/brcmfmac/common.h | 1 + .../broadcom/brcm80211/brcmfmac/core.c | 8 ++------ 3 files changed, 16 insertions(+), 11 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c index fe01da9e620d..dccd8f4ca1d0 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c @@ -190,6 +190,17 @@ static int brcmf_c_process_clm_blob(struct brcmf_if *ifp) return err; } +int brcmf_c_set_cur_etheraddr(struct brcmf_if *ifp, const u8 *addr) +{ + s32 err; + + err = brcmf_fil_iovar_data_set(ifp, "cur_etheraddr", addr, ETH_ALEN); + if (err < 0) + bphy_err(ifp->drvr, "Setting cur_etheraddr failed, %d\n", err); + + return err; +} + int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) { struct brcmf_pub *drvr = ifp->drvr; @@ -204,12 +215,9 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) if (is_valid_ether_addr(ifp->mac_addr)) { /* set mac address */ - err = brcmf_fil_iovar_data_set(ifp, "cur_etheraddr", ifp->mac_addr, - ETH_ALEN); - if (err < 0) { - bphy_err(ifp->drvr, "Setting cur_etheraddr failed, %d\n", err); + err = brcmf_c_set_cur_etheraddr(ifp, ifp->mac_addr); + if (err < 0) goto done; - } } else { /* retrieve mac address */ err = brcmf_fil_iovar_data_get(ifp, "cur_etheraddr", ifp->mac_addr, diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h index 15accc88d5c0..7329eb751945 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.h @@ -65,6 +65,7 @@ void brcmf_release_module_param(struct brcmf_mp_device *module_param); /* Sets dongle media info (drv_version, mac address). */ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp); +int brcmf_c_set_cur_etheraddr(struct brcmf_if *ifp, const u8 *addr); #ifdef CONFIG_DMI void brcmf_dmi_probe(struct brcmf_mp_device *settings, u32 chip, u32 chiprev); diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c index 87aef211b35f..bd164a0821f9 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c @@ -233,16 +233,12 @@ static int brcmf_netdev_set_mac_address(struct net_device *ndev, void *addr) { struct brcmf_if *ifp = netdev_priv(ndev); struct sockaddr *sa = (struct sockaddr *)addr; - struct brcmf_pub *drvr = ifp->drvr; int err; brcmf_dbg(TRACE, "Enter, bsscfgidx=%d\n", ifp->bsscfgidx); - err = brcmf_fil_iovar_data_set(ifp, "cur_etheraddr", sa->sa_data, - ETH_ALEN); - if (err < 0) { - bphy_err(drvr, "Setting cur_etheraddr failed, %d\n", err); - } else { + err = brcmf_c_set_cur_etheraddr(ifp, sa->sa_data); + if (err >= 0) { brcmf_dbg(TRACE, "updated to %pM\n", sa->sa_data); memcpy(ifp->mac_addr, sa->sa_data, ETH_ALEN); eth_hw_addr_set(ifp->ndev, ifp->mac_addr); From patchwork Fri Jul 8 13:32:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 588896 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3F02C433EF for ; Fri, 8 Jul 2022 13:32:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238221AbiGHNce (ORCPT ); Fri, 8 Jul 2022 09:32:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238218AbiGHNcd (ORCPT ); Fri, 8 Jul 2022 09:32:33 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6635C3057B for ; 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Fri, 8 Jul 2022 13:32:26 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.193.188]) by smtp.corp.redhat.com (Postfix) with ESMTP id 47D6D492C3B; Fri, 8 Jul 2022 13:32:25 +0000 (UTC) From: Hans de Goede To: Arend van Spriel , Franky Lin , Hante Meuleman , Kalle Valo Cc: Hans de Goede , linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, SHA-cyfmac-dev-list@infineon.com Subject: [PATCH 2/2] brcmfmac: Replace default (not configured) MAC with a random MAC Date: Fri, 8 Jul 2022 15:32:23 +0200 Message-Id: <20220708133223.101558-2-hdegoede@redhat.com> In-Reply-To: <20220708133223.101558-1-hdegoede@redhat.com> References: <20220708133223.101558-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On some boards there is no eeprom to hold the nvram, in this case instead a board specific nvram is loaded from /lib/firmware. On most boards the macaddr=... setting in the /lib/firmware nvram file is ignored because the wifi/bt chip has a unique MAC programmed into the chip itself. But in some cases the actual MAC from the /lib/firmware nvram file gets used, leading to MAC conflicts. The MAC addresses in the troublesome nvram files seem to all come from the same nvram file template, so we can detect this by checking for the template nvram file MAC. Detect that the default MAC address is being used and replace it with a random MAC address to avoid MAC address conflicts. Note that udev will detect this is a random MAC based on /sys/class/net/wlan0/addr_assign_type and then replace this with a MAC based on hashing the netdev-name + the machine-id. So that the MAC address is both guaranteed to be unique per machine while it is still the same/persistent at each boot (assuming the default Link.MACAddressPolicy=persistent udev setting). Signed-off-by: Hans de Goede --- .../broadcom/brcm80211/brcmfmac/common.c | 23 +++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c index dccd8f4ca1d0..7485e784be2a 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c @@ -201,6 +201,20 @@ int brcmf_c_set_cur_etheraddr(struct brcmf_if *ifp, const u8 *addr) return err; } +/* On some boards there is no eeprom to hold the nvram, in this case instead + * a board specific nvram is loaded from /lib/firmware. On most boards the + * macaddr setting in the /lib/firmware nvram file is ignored because the + * wifibt chip has a unique MAC programmed into the chip itself. + * But in some cases the actual MAC from the /lib/firmware nvram file gets + * used, leading to MAC conflicts. + * The MAC addresses in the troublesome nvram files seem to all come from + * the same nvram file template, so we only need to check for 1 known + * address to detect this. + */ +static const u8 brcmf_default_mac_address[ETH_ALEN] = { + 0x00, 0x90, 0x4c, 0xc5, 0x12, 0x38 +}; + int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) { struct brcmf_pub *drvr = ifp->drvr; @@ -226,6 +240,15 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp) bphy_err(drvr, "Retrieving cur_etheraddr failed, %d\n", err); goto done; } + + if (ether_addr_equal_unaligned(ifp->mac_addr, brcmf_default_mac_address)) { + bphy_err(drvr, "Default MAC is used, replacing with random MAC to avoid conflicts\n"); + eth_random_addr(ifp->mac_addr); + ifp->ndev->addr_assign_type = NET_ADDR_RANDOM; + err = brcmf_c_set_cur_etheraddr(ifp, ifp->mac_addr); + if (err < 0) + goto done; + } } memcpy(ifp->drvr->mac, ifp->mac_addr, sizeof(ifp->drvr->mac));