From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C52B03B38A1; Tue, 5 May 2026 08:55:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777971319; cv=none; b=UDr6cZtjjpKW/EPwat1ij5KyHvwP9lh5ue3zfUnGctXTzSdqusw/85zUaURHpS8sQwu+BRL9lIrnko/lNH3gSg4dpWxgQeu4mDCX4sKaqlWnCgVtIymjiJ9zAKZFlwMUCtpKCshDhk3CUe3Z2ew4NZlNiyTbpTh4PjEmQyv7aBs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777971319; c=relaxed/simple; bh=QRd2iY8szZT5giyAzvp//9cY5blWqFzY5LFz5fYZY28=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=VzMjPLS3IguHu+xFUsZ8my6dJ09DmSMhAbHS5ifXetwy2yd08OKvyVPShvjKy8BNQp8bdjO4Lwe4jQsIf4Uuz8NUVftVXUaIQgmiK/+XD6NU2cDP8LzDCN7Oq5CE1PfMID6ayTlXquNN8jXsRAKFz5f/9YTEQsE8lMBmhmoZeVs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KZpwvvYt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KZpwvvYt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 61EA0C2BCB9; Tue, 5 May 2026 08:55:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777971319; bh=QRd2iY8szZT5giyAzvp//9cY5blWqFzY5LFz5fYZY28=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=KZpwvvYtibFBP3nplr6Z8ukwM7AsFTmjWRjzkz6wb9wo/hTYW95dKZpfghL7yc3kt mWpYWf2V4o8oMlomymh3jx5+2GCajILChRQQ8CgqOPU10+JhB9kLF8VRdF7sLlA3Y8 XIf6b9UqhK+rUC2sVrtjJNbR4YVUYJvu/THlM05wr2Sv4FwB7IPcM44GwamdngLYkU 1a7UsgSxKney6JQd28Tf702AA/nbfofzn26OITAbhJv6k0Ak68vSvpTiSyrMugyWcS TuokHyNHeKcTyXxRuz4JQElfLnaCmQYKdok51bj+6AucUrqFuGyQ7DVSPS1kmh1auC 5Yhtk7F+JLNqQ== From: Konrad Dybcio Date: Tue, 05 May 2026 10:55:05 +0200 Subject: [PATCH 2/2] usb: dwc3: Notify XHCI core of tunneled status 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: <20260505-topic-dwc3_tunneling_state-v1-2-4aaa6c3c14cb@oss.qualcomm.com> References: <20260505-topic-dwc3_tunneling_state-v1-0-4aaa6c3c14cb@oss.qualcomm.com> In-Reply-To: <20260505-topic-dwc3_tunneling_state-v1-0-4aaa6c3c14cb@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 , Konrad Dybcio X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777971309; l=3871; i=konrad.dybcio@oss.qualcomm.com; s=20230215; h=from:subject:message-id; bh=Cm9Uwo6XZtB97T5drOJvRuyeGYTlUiuLuWKPUAEW8M0=; b=yHM/wjI8Xf1st9tzPnJ560SnIfcERELAfSKOCaaHQAhviatKhy+b553/oe9EsG/lW0I8GxN5/ 0YsA2JVtr35C2gqD1IC9R9kEPARVBiwDTebkZR8Yw36QE7OVJn400Um X-Developer-Key: i=konrad.dybcio@oss.qualcomm.com; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= From: Konrad Dybcio The Thunderbolt framework relies on the USB core to create device links for tunneled ports, so that the USB3 controller is only kept runtime-resumed for the duration of the tunneling. This depends on first knowing whether a connection is tunneled or native. Add the logic to handle that for DWC3 controllers. Signed-off-by: Konrad Dybcio --- drivers/usb/dwc3/core.c | 12 ++++++++++++ drivers/usb/dwc3/core.h | 18 ++++++++++++++++++ drivers/usb/dwc3/host.c | 12 ++++++++++++ 3 files changed, 42 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 65213896de99..7cec4911e278 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -162,6 +162,18 @@ void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode, bool ignore_susphy) } EXPORT_SYMBOL_GPL(dwc3_set_prtcap); +enum usb_link_tunnel_mode dwc3_link_tunnel_mode(struct dwc3 *dwc, u8 port) +{ + /* Prior versions had no CIO support */ + if (!DWC3_VER_IS_WITHIN(DWC31, 191A, ANY)) + return USB_LINK_NATIVE; + + if (dwc3_readl(dwc, DWC3_CIOCTRL(port)) & DWC3_CIOCTRL_CIO_EN) + return USB_LINK_TUNNELED; + + return USB_LINK_NATIVE; +} + static void __dwc3_set_mode(struct work_struct *work) { struct dwc3 *dwc = work_to_dwc(work); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index e0dee9d28740..9594829de6c7 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -179,6 +179,11 @@ #define DWC3_OEVTEN 0xcc0C #define DWC3_OSTS 0xcc10 +/* CIO regs */ +#define DWC3_CIO_BASE(n) (0xcd20 + ((n) * 0x30)) +#define DWC3_CIOCTRL(n) (DWC3_CIO_BASE(n) + 0x00) +#define DWC3_CIOCTRL_CIO_EN BIT(0) + #define DWC3_LLUCTL(n) (0xd024 + ((n) * 0x80)) /* Bit fields */ @@ -1309,6 +1314,7 @@ struct dwc3 { #define DWC31_REVISION_170A 0x3137302a #define DWC31_REVISION_180A 0x3138302a #define DWC31_REVISION_190A 0x3139302a +#define DWC31_REVISION_191A 0x3139312a #define DWC31_REVISION_200A 0x3230302a #define DWC32_REVISION_ANY 0x0 @@ -1653,11 +1659,23 @@ static inline void dwc3_pre_run_stop(struct dwc3 *dwc, bool is_on) #if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) int dwc3_host_init(struct dwc3 *dwc); void dwc3_host_exit(struct dwc3 *dwc); + +/** + * dwc3_link_tunnel_mode - Check whether the link is tunneled over TBT/USB4 + * @dwc: Pointer to DWC3 controller context + * @port: 0-based port index + * + * Returns: USB_LINK_TUNNELED if tunneled, USB_LINK_NATIVE if not, or + * when the controller does not have USB4 capabilities. + */ +enum usb_link_tunnel_mode dwc3_link_tunnel_mode(struct dwc3 *dwc, u8 port); #else static inline int dwc3_host_init(struct dwc3 *dwc) { return 0; } static inline void dwc3_host_exit(struct dwc3 *dwc) { } +static inline enum usb_link_tunnel_mode dwc3_link_tunnel_mode(struct dwc3 *dwc, u8 port) +{ return USB_LINK_UNKNOWN; } #endif #if IS_ENABLED(CONFIG_USB_DWC3_GADGET) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index 96b588bd08cd..eb03b079696e 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -77,8 +77,20 @@ static void dwc3_xhci_plat_start(struct usb_hcd *hcd) dwc3_enable_susphy(dwc, true); } +static enum usb_link_tunnel_mode dwc3_xhci_tunnel_mode(struct usb_hcd *hcd, int portnum) +{ + struct platform_device *pdev; + struct dwc3 *dwc; + + pdev = to_platform_device(hcd->self.controller); + dwc = dev_get_drvdata(pdev->dev.parent); + + return dwc3_link_tunnel_mode(dwc, portnum); +} + static const struct xhci_plat_priv dwc3_xhci_plat_quirk = { .plat_start = dwc3_xhci_plat_start, + .tunnel_mode = dwc3_xhci_tunnel_mode, }; static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, -- 2.54.0