From patchwork Wed Sep 8 09:53:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12480745 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37B62C433F5 for ; Wed, 8 Sep 2021 09:53:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 14A2761158 for ; Wed, 8 Sep 2021 09:53:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350293AbhIHJyc (ORCPT ); Wed, 8 Sep 2021 05:54:32 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:44924 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343606AbhIHJyb (ORCPT ); Wed, 8 Sep 2021 05:54:31 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 1889rKKW105331; Wed, 8 Sep 2021 04:53:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1631094800; bh=MTZp1FaMaUfT0YN+JpRQy4q79vcEe3BCR/6we5PWQdA=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=tOEQLUSo3++zVtoKODwoGo7q93D1dKazFEs67oiSI4CgHVxuGfKrsWiPr+TQSWWEe OAN9ZQQojPqZXNOxeE9nBXwH7l4mW2wkrwQoa6tUf8bMVO3iiuxUxRtfODy7rkuO/B ZWp99V3vYYlomDqUm5DfK/J00HdWpwZE956F6DE4= Received: from DFLE105.ent.ti.com (dfle105.ent.ti.com [10.64.6.26]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 1889rKMV094116 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 8 Sep 2021 04:53:20 -0500 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Wed, 8 Sep 2021 04:53:20 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Wed, 8 Sep 2021 04:53:20 -0500 Received: from a0393678-lt.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 1889rC4C019690; Wed, 8 Sep 2021 04:53:17 -0500 From: Kishon Vijay Abraham I To: Greg Kroah-Hartman , Mathias Nyman , Alan Stern CC: , , , Kishon Vijay Abraham I , Subject: [PATCH v3 1/3] usb: core: hcd: Add support for deferring roothub registration Date: Wed, 8 Sep 2021 15:23:10 +0530 Message-ID: <20210908095312.985-2-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210908095312.985-1-kishon@ti.com> References: <20210908095312.985-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org It has been observed with certain PCIe USB cards (like Inateck connected to AM64 EVM or J7200 EVM) that as soon as the primary roothub is registered, port status change is handled even before xHC is running leading to cold plug USB devices not detected. For such cases, registering both the root hubs along with the second HCD is required. Add support for deferring roothub registration in usb_add_hcd(), so that both primary and secondary roothubs are registered along with the second HCD. CC: stable@vger.kernel.org # 5.4+ Signed-off-by: Kishon Vijay Abraham I Suggested-by: Mathias Nyman Tested-by: Chris Chiu Reported-by: kernel test robot --- drivers/usb/core/hcd.c | 30 ++++++++++++++++++++++++------ include/linux/usb/hcd.h | 2 ++ 2 files changed, 26 insertions(+), 6 deletions(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 0f8b7c93310e..30bbf4ac4284 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2775,6 +2775,7 @@ int usb_add_hcd(struct usb_hcd *hcd, { int retval; struct usb_device *rhdev; + struct usb_hcd *shared_hcd; if (!hcd->skip_phy_initialization && usb_hcd_is_primary_hcd(hcd)) { hcd->phy_roothub = usb_phy_roothub_alloc(hcd->self.sysdev); @@ -2935,13 +2936,26 @@ int usb_add_hcd(struct usb_hcd *hcd, goto err_hcd_driver_start; } + /* starting here, usbcore will pay attention to the shared HCD roothub */ + shared_hcd = hcd->shared_hcd; + if (!usb_hcd_is_primary_hcd(hcd) && shared_hcd && HCD_DEFER_RH_REGISTER(shared_hcd)) { + retval = register_root_hub(shared_hcd); + if (retval != 0) + goto err_register_root_hub; + + if (shared_hcd->uses_new_polling && HCD_POLL_RH(shared_hcd)) + usb_hcd_poll_rh_status(shared_hcd); + } + /* starting here, usbcore will pay attention to this root hub */ - retval = register_root_hub(hcd); - if (retval != 0) - goto err_register_root_hub; + if (!HCD_DEFER_RH_REGISTER(hcd)) { + retval = register_root_hub(hcd); + if (retval != 0) + goto err_register_root_hub; - if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) - usb_hcd_poll_rh_status(hcd); + if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) + usb_hcd_poll_rh_status(hcd); + } return retval; @@ -2985,6 +2999,7 @@ EXPORT_SYMBOL_GPL(usb_add_hcd); void usb_remove_hcd(struct usb_hcd *hcd) { struct usb_device *rhdev = hcd->self.root_hub; + unsigned rh_registered; dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); @@ -2995,6 +3010,8 @@ void usb_remove_hcd(struct usb_hcd *hcd) dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); spin_lock_irq (&hcd_root_hub_lock); + if (hcd->rh_registered == 1) + rh_registered = 1; hcd->rh_registered = 0; spin_unlock_irq (&hcd_root_hub_lock); @@ -3004,7 +3021,8 @@ void usb_remove_hcd(struct usb_hcd *hcd) cancel_work_sync(&hcd->died_work); mutex_lock(&usb_bus_idr_lock); - usb_disconnect(&rhdev); /* Sets rhdev to NULL */ + if (rh_registered == 1) + usb_disconnect(&rhdev); /* Sets rhdev to NULL */ mutex_unlock(&usb_bus_idr_lock); /* diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 548a028f2dab..2c1fc9212cf2 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -124,6 +124,7 @@ struct usb_hcd { #define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */ #define HCD_FLAG_DEAD 6 /* controller has died? */ #define HCD_FLAG_INTF_AUTHORIZED 7 /* authorize interfaces? */ +#define HCD_FLAG_DEFER_RH_REGISTER 8 /* Defer roothub registration */ /* The flags can be tested using these macros; they are likely to * be slightly faster than test_bit(). @@ -134,6 +135,7 @@ struct usb_hcd { #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING)) #define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING)) #define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD)) +#define HCD_DEFER_RH_REGISTER(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEFER_RH_REGISTER)) /* * Specifies if interfaces are authorized by default From patchwork Wed Sep 8 09:53:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12480749 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6EF59C433F5 for ; Wed, 8 Sep 2021 09:53:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D07B61163 for ; Wed, 8 Sep 2021 09:53:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351357AbhIHJyh (ORCPT ); Wed, 8 Sep 2021 05:54:37 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:44938 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244785AbhIHJyf (ORCPT ); Wed, 8 Sep 2021 05:54:35 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 1889rOiv105402; Wed, 8 Sep 2021 04:53:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1631094804; bh=i/T5CHFI9h8ioTxwA6pnqpLsVdrGp6tVpLfy8pMU8Zo=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=yzeLAr3gXwepE/IgpfyL1KCmgzDVLg16fmRAPY98DRyU3F5satsx+PW4MDTFXzTrb hbnasD8GeBgDcyYb8se1GevsUopVJ4pGTDBZ27OCRVV8WNudalhjdc1g9ttsyl9Oo3 pJXowCZsYzFxwT15kxQw6Mpl1VqI7Wq6E4b1DxWw= Received: from DFLE103.ent.ti.com (dfle103.ent.ti.com [10.64.6.24]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 1889rOun094189 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 8 Sep 2021 04:53:24 -0500 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Wed, 8 Sep 2021 04:53:23 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Wed, 8 Sep 2021 04:53:23 -0500 Received: from a0393678-lt.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 1889rC4D019690; Wed, 8 Sep 2021 04:53:20 -0500 From: Kishon Vijay Abraham I To: Greg Kroah-Hartman , Mathias Nyman , Alan Stern CC: , , , Kishon Vijay Abraham I , Subject: [PATCH v3 2/3] xhci: Set HCD flag to defer primary roothub registration Date: Wed, 8 Sep 2021 15:23:11 +0530 Message-ID: <20210908095312.985-3-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210908095312.985-1-kishon@ti.com> References: <20210908095312.985-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Set "HCD_FLAG_DEFER_RH_REGISTER" to hcd->flags in xhci_run() to defer registering primary roothub in usb_add_hcd(). This will make sure both primary roothub and secondary roothub will be registered along with the second HCD. This is required for cold plugged USB devices to be detected in certain PCIe USB cards (like Inateck USB card connected to AM64 EVM or J7200 EVM). CC: stable@vger.kernel.org # 5.4+ Signed-off-by: Kishon Vijay Abraham I Suggested-by: Mathias Nyman Tested-by: Chris Chiu --- drivers/usb/host/xhci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 3618070eba78..7176058c7f3e 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -692,6 +692,7 @@ int xhci_run(struct usb_hcd *hcd) if (ret) xhci_free_command(xhci, command); } + set_bit(HCD_FLAG_DEFER_RH_REGISTER, &hcd->flags); xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Finished xhci_run for USB2 roothub"); From patchwork Wed Sep 8 09:53:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12480751 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3834C433FE for ; Wed, 8 Sep 2021 09:53:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB9F660EFE for ; Wed, 8 Sep 2021 09:53:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351383AbhIHJyl (ORCPT ); Wed, 8 Sep 2021 05:54:41 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:57490 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351393AbhIHJyj (ORCPT ); Wed, 8 Sep 2021 05:54:39 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 1889rR6O001016; Wed, 8 Sep 2021 04:53:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1631094807; bh=UPLBJBjpDV9YcG77Py1APlFvPEf164At/6lGLF5HjU8=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=ZfWH1yNJMNit3shcTvDmJrurLjXne62eOSjyWJONbkkgertbDVf1bP3MHNfu6Yo7J kwAe5TnITmSwrSq4aRwFW1TgMY6cm60F9Szn60faaWTzK5HvTErG/ZoFG8GaXw08jQ RHV9bLsrrQhzOXHFLo29ND0itst9hC401F7qTEvM= Received: from DFLE105.ent.ti.com (dfle105.ent.ti.com [10.64.6.26]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 1889rR8c030298 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 8 Sep 2021 04:53:27 -0500 Received: from DFLE105.ent.ti.com (10.64.6.26) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Wed, 8 Sep 2021 04:53:27 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Wed, 8 Sep 2021 04:53:27 -0500 Received: from a0393678-lt.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 1889rC4E019690; Wed, 8 Sep 2021 04:53:24 -0500 From: Kishon Vijay Abraham I To: Greg Kroah-Hartman , Mathias Nyman , Alan Stern CC: , , , Kishon Vijay Abraham I , Subject: [PATCH v3 3/3] usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd() Date: Wed, 8 Sep 2021 15:23:12 +0530 Message-ID: <20210908095312.985-4-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210908095312.985-1-kishon@ti.com> References: <20210908095312.985-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org No functional change. Since configuration to stop HCD is invoked from multiple places, group all of them in usb_stop_hcd(). Signed-off-by: Kishon Vijay Abraham I Acked-by: Alan Stern Tested-by: Chris Chiu --- drivers/usb/core/hcd.c | 39 ++++++++++++++++++++++----------------- 1 file changed, 22 insertions(+), 17 deletions(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 30bbf4ac4284..6f72da245f69 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2760,6 +2760,26 @@ static void usb_put_invalidate_rhdev(struct usb_hcd *hcd) usb_put_dev(rhdev); } +/** + * usb_stop_hcd - Halt the HCD + * @hcd: the usb_hcd that has to be halted + * + * Stop the root-hub polling timer and invoke the HCD's ->stop callback. + */ +static void usb_stop_hcd(struct usb_hcd *hcd) +{ + hcd->rh_pollable = 0; + clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); + del_timer_sync(&hcd->rh_timer); + + hcd->driver->stop(hcd); + hcd->state = HC_STATE_HALT; + + /* In case the HCD restarted the timer, stop it again. */ + clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); + del_timer_sync(&hcd->rh_timer); +} + /** * usb_add_hcd - finish generic HCD structure initialization and register * @hcd: the usb_hcd structure to initialize @@ -2960,13 +2980,7 @@ int usb_add_hcd(struct usb_hcd *hcd, return retval; err_register_root_hub: - hcd->rh_pollable = 0; - clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); - del_timer_sync(&hcd->rh_timer); - hcd->driver->stop(hcd); - hcd->state = HC_STATE_HALT; - clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); - del_timer_sync(&hcd->rh_timer); + usb_stop_hcd(hcd); err_hcd_driver_start: if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) free_irq(irqnum, hcd); @@ -3040,16 +3054,7 @@ void usb_remove_hcd(struct usb_hcd *hcd) * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke * the hub_status_data() callback. */ - hcd->rh_pollable = 0; - clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); - del_timer_sync(&hcd->rh_timer); - - hcd->driver->stop(hcd); - hcd->state = HC_STATE_HALT; - - /* In case the HCD restarted the timer, stop it again. */ - clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); - del_timer_sync(&hcd->rh_timer); + usb_stop_hcd(hcd); if (usb_hcd_is_primary_hcd(hcd)) { if (hcd->irq > 0)