From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 DABA046D568; Tue, 29 Sep 2026 15:54:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790697294; cv=none; b=MpEccwExh8GtNnQrUgTNUyti5gS9rViAJ2s3UE6MWXY6nMWW38mHLMCQYZipMC0YMZChAEOhKsucbwwkYEshMW6sLiwDAzZ3+aaIL//4OqFQHNXLb073wbP1lmZp1ZM6svNTlgPPJ2gl4WoM1LktrnJyW5OY+qPfOZMMhu9rxkY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790697294; c=relaxed/simple; bh=vDqOreTD0jwGwH+Qpe5f5av8hDi3D49g9Wc5PPTZ2nM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=oKmkFiXOwL/cLvF7qklt03kI3N6vYgoWzgAt46d4Tla8CTnZX/0mzDljBv3DN5iYALNDQxzuyhCNMNLcJtDGoAtCg6Z0yt1zwBloJ9lC6ZU0BD1Gzl9Pddk4iDWEdrsofbJ1SeG5d2i/eTCSGmzlFFawJn8jFCK59NB7lH+53Bk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UxnDuUx2; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="UxnDuUx2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88BBD1F00893; Tue, 29 Sep 2026 15:54:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790697292; bh=C1nNEkZHHSsQQmDEL1Bqgc72a4g+kVWibY+I/UwnVLI=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=UxnDuUx2f/SXFiYfMT21P6oaHV5J479tCUyUUC0q+GvIDvlUlhwAG3Qgf40rEc7r+ l7FtNy93ftmgVFqE2ih7TlBcE8ii+5udxJ0HEoBRS9X2MK2607QQkM+Eat4CPNWQzF lFHqAMYs4htne53rP4dDAbUrFwmU1UFZmqpxyrwFWibYrG4IvJbySOlUkJf0vIxNkE R85W8JoIv2Ojj6Izjl130g9vxj5RKHLOxqxD3YkuNA8BehE6u6GtcMkIErANTuSF7a HiBLTepYCbtwuMmZCIxnkhCvXSXu4gGGlQIFCSLJVWXc1Qix22Lt0lhcIVhfm5yMJp 5bVl8epD6+ovg== From: Konrad Dybcio Date: Tue, 29 Sep 2026 17:54:41 +0200 Subject: [PATCH v4 1/4] usb: xhci: debugfs: Expose the USB3 tunneling ext_cap register value Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260929-topic-dwc3_tunneling_state-v4-1-63e296346d57@oss.qualcomm.com> References: <20260929-topic-dwc3_tunneling_state-v4-0-63e296346d57@oss.qualcomm.com> In-Reply-To: <20260929-topic-dwc3_tunneling_state-v4-0-63e296346d57@oss.qualcomm.com> To: Thinh Nguyen , Greg Kroah-Hartman , Mathias Nyman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, usb4-upstream@oss.qualcomm.com, Raghavendra Thoorpu , Mika Westerberg , Sven Peter , Konrad Dybcio X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1790697285; l=2330; i=konrad.dybcio@oss.qualcomm.com; s=20230215; h=from:subject:message-id; bh=jtkUFoB8RrIjABUW5cqThxgdRivlft56tJqG0ykNoQ8=; b=UUOqlz+5uGTgY6dqSc30fcumyOuI1RsaM85AT0nEttF98k58SoQUWYJtiIB43ccU720r2dNkK xPXitcAPtyaDnW1zwP7ubraHv6ScQaTsRJyJwgi5Qih91fqANckBfYk X-Developer-Key: i=konrad.dybcio@oss.qualcomm.com; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= From: Konrad Dybcio The USB3 Tunneling Support Capability (idx 18) features a single register. Expose it over debugfs, if supported by the controller. Reviewed-by: Thinh Nguyen Signed-off-by: Konrad Dybcio --- drivers/usb/host/xhci-debugfs.c | 9 +++++++++ drivers/usb/host/xhci-debugfs.h | 2 ++ drivers/usb/host/xhci-ext-caps.h | 1 + 3 files changed, 12 insertions(+) diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c index 2aa01d99f23d..f4bb66a9845a 100644 --- a/drivers/usb/host/xhci-debugfs.c +++ b/drivers/usb/host/xhci-debugfs.c @@ -82,6 +82,10 @@ static const struct debugfs_reg32 xhci_extcap_dbc[] = { dump_register(EXTCAP_DBC_DEVINFO2), }; +static const struct debugfs_reg32 xhci_extcap_usb3_tunneling[] = { + dump_register(EXTCAP_USB3_TUNNELING), +}; + static struct dentry *xhci_debugfs_root; static struct xhci_regset *xhci_debugfs_alloc_regset(struct xhci_hcd *xhci) @@ -816,6 +820,11 @@ void xhci_debugfs_init(struct xhci_hcd *xhci) ARRAY_SIZE(xhci_extcap_dbc), "reg-ext-dbc"); + xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_USB3_TUNNELING, + xhci_extcap_usb3_tunneling, + ARRAY_SIZE(xhci_extcap_usb3_tunneling), + "reg-usb3-tunneling"); + xhci_debugfs_create_ring_dir(xhci, &xhci->cmd_ring, "command-ring", xhci->debugfs_root); diff --git a/drivers/usb/host/xhci-debugfs.h b/drivers/usb/host/xhci-debugfs.h index 7c074b4be819..ca6b7f2da8e3 100644 --- a/drivers/usb/host/xhci-debugfs.h +++ b/drivers/usb/host/xhci-debugfs.h @@ -70,6 +70,8 @@ #define REG_EXTCAP_DBC_DEVINFO1 0x38 #define REG_EXTCAP_DBC_DEVINFO2 0x3c +#define REG_EXTCAP_USB3_TUNNELING 0x00 + #define dump_register(nm) \ { \ .name = __stringify(nm), \ diff --git a/drivers/usb/host/xhci-ext-caps.h b/drivers/usb/host/xhci-ext-caps.h index 67ecf7320c62..22e53a750e2a 100644 --- a/drivers/usb/host/xhci-ext-caps.h +++ b/drivers/usb/host/xhci-ext-caps.h @@ -40,6 +40,7 @@ #define XHCI_EXT_CAPS_ROUTE 5 /* IDs 6-9 reserved */ #define XHCI_EXT_CAPS_DEBUG 10 +#define XHCI_EXT_CAPS_USB3_TUNNELING 18 /* Vendor caps */ #define XHCI_EXT_CAPS_VENDOR_INTEL 192 #define XHCI_EXT_CAPS_INTEL_SPR_SHADOW 206 -- 2.55.0