From patchwork Mon Dec 4 10:38:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 750353 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="fMFQahKp" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1294DDF for ; Mon, 4 Dec 2023 02:38:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701686317; x=1733222317; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=JER1ZaMiU5C1NPyWlks3szx/4/+GqBAHpBzad4wCHtM=; b=fMFQahKpGMsctcM7FudI82mK33mox+pCNxnVHG6o6yESH5D0SR/i9k8p lLLV9LSSluKR73Or36PtxF9KHCbpPIa5PVq8/io8IQ1Q19Ll1VIoLWfXv 6O+FKcO9mM8IswCRLr5P9lQOxFac5n98Cdq/o4uvoUhE0NuUkEmu8cmMi W0C0hCUNsyip4xQ6bpeun67oLFQMVXlbuygZzvLAO4Y14CAolnuKxYQ8T ZKFKj6JiiZvjWJzGEjCNh83vsihrXwD6d6DYvgJeqoQDItxlLOoIhBwee Fmi8qcHtB8gCnteksDLfkmW762fEkCRamTDQEHY0HsBPbV9zlPokIa4Du w==; X-IronPort-AV: E=McAfee;i="6600,9927,10913"; a="424880786" X-IronPort-AV: E=Sophos;i="6.04,249,1695711600"; d="scan'208";a="424880786" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Dec 2023 02:38:36 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10913"; a="763904030" X-IronPort-AV: E=Sophos;i="6.04,249,1695711600"; d="scan'208";a="763904030" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga007.jf.intel.com with ESMTP; 04 Dec 2023 02:38:33 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id C0A2FA96; Mon, 4 Dec 2023 12:38:28 +0200 (EET) From: Mika Westerberg To: Yehezkel Bernat , Michael Jamet , Lukas Wunner , Andreas Noever Cc: linux-usb@vger.kernel.org, Gil Fine , Pengfei Xu , Dan Carpenter , Mika Westerberg Subject: [PATCH 10/11] thunderbolt: Disable PCIe extended encapsulation upon teardown properly Date: Mon, 4 Dec 2023 12:38:27 +0200 Message-ID: <20231204103828.1635531-11-mika.westerberg@linux.intel.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231204103828.1635531-1-mika.westerberg@linux.intel.com> References: <20231204103828.1635531-1-mika.westerberg@linux.intel.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Gil Fine In case of PCIe tunnel teardown (including if caused by router unplug), PCIe extended encapsulation bit should be cleared in downstream and upstream routers accordingly. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg --- drivers/thunderbolt/tunnel.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c index f0fde79b3b02..96b238b06f9d 100644 --- a/drivers/thunderbolt/tunnel.c +++ b/drivers/thunderbolt/tunnel.c @@ -173,16 +173,28 @@ static int tb_pci_set_ext_encapsulation(struct tb_tunnel *tunnel, bool enable) int ret; /* Only supported of both routers are at least USB4 v2 */ - if (tb_port_get_link_generation(port) < 4) + if ((usb4_switch_version(tunnel->src_port->sw) < 2) || + (usb4_switch_version(tunnel->dst_port->sw) < 2)) + return 0; + + if (enable && tb_port_get_link_generation(port) < 4) return 0; ret = usb4_pci_port_set_ext_encapsulation(tunnel->src_port, enable); if (ret) return ret; + /* + * Downstream router could be unplugged so disable of encapsulation + * in upstream router is still possible. + */ ret = usb4_pci_port_set_ext_encapsulation(tunnel->dst_port, enable); - if (ret) - return ret; + if (ret) { + if (enable) + return ret; + if (ret != -ENODEV) + return ret; + } tb_tunnel_dbg(tunnel, "extended encapsulation %s\n", str_enabled_disabled(enable));