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 E21AE478E56; Tue, 1 Sep 2026 10:05:53 +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=1788257156; cv=none; b=COxJZvjFPlqiHTbJ9T384kAY+dUPWKf/YY+QHHBqAeqT+ntromBlHJALm/pQLMJenGx4LK6nrDmrHGdzZs7lx6PZeKPrXdzyCLt9lZlZw+mTnpjWEUgAAaW/fu2ogBy1RAoRnARKPzS+ba01gKDSYctcUKFBV8wVmwU1/PyrcoA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788257156; c=relaxed/simple; bh=PkpB4+pkEgMP4SQTFp14JuZl+BC388LwIYCEsgFxZXE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=GfD/WtNnBByHT4xB92VI7B3s70xjMwJeyZps/JEDI5q0q4O5Tqra6h1w8xSlg3JHxojE+NKhyRx6V2sopQGAsUVAcX3Fz1DIre/EN7IafhVoxl9XLUA31inAC83/MBnHLL/iv0pqlJsMXQT8jN0/I/jB3v4tYa4ZMgOzVrIkXV0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JJkvQkJK; 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="JJkvQkJK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 272CB1F00A3D; Tue, 1 Sep 2026 10:05:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788257153; bh=be0Lk1c1EPMLsvHe1SiuO/oX6tRh9CySvTwV5BBLgGg=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=JJkvQkJKid72OD2rn1cm0RSnVt5EvepCYHKqLCBiYEYSosfd5Nox9gycmIVApF1Am oBNQ2fJy2xrFtjxqPPeq1WDmzvCy0D9qm6Cv8DuHtk0EMZC/ftZzikeP58fCRIUvWS P/4K6Wl4YLu5JumKQLQpqN+xI7IGHAjhkxlf34O+60dS+YH1EmaHFok5jK9fGd35nQ 6/1bRfQQH0CUGzKPFj6a1CVHTdjg2ALdxpmyOrRhDsxBtBZCsxATAkeHxG2rCQQUrP Sev7YEhBQLTV95yyERkmmvxg4sT9mA8W325wSoEv/n0G9HsFW6jFkwBvINszz6RmwG 4Jgh3OXWAAppg== From: Konrad Dybcio Date: Tue, 01 Sep 2026 12:05:43 +0200 Subject: [PATCH v3 1/4] usb: xhci: debugfs: Expose the USB3 tunneling ext_cap register value Precedence: bulk X-Mailing-List: linux-usb@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: <20260901-topic-dwc3_tunneling_state-v3-1-22fdced8de55@oss.qualcomm.com> References: <20260901-topic-dwc3_tunneling_state-v3-0-22fdced8de55@oss.qualcomm.com> In-Reply-To: <20260901-topic-dwc3_tunneling_state-v3-0-22fdced8de55@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 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1788257146; l=2275; i=konrad.dybcio@oss.qualcomm.com; s=20230215; h=from:subject:message-id; bh=wuYmnoHK2aZ+IH1Vx6nM1Y18Ks5FNSxDzKLCVZBW5Ns=; b=fjB1t+7V6x/mTUnYuHJastnaxa4Fx9NZsXn8ZG/jFgmB674+ij3zf5+pVEvmda/B6EboMt3o9 xwuNRqKScw1AEmrfPGmTd5LvPmf2vx6UM8KTgKjosjyjAoKXNbeQ4um 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. 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