From patchwork Tue Dec 7 14:37:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 521884 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D729C433F5 for ; Tue, 7 Dec 2021 14:38:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238003AbhLGOld (ORCPT ); Tue, 7 Dec 2021 09:41:33 -0500 Received: from mga03.intel.com ([134.134.136.65]:48397 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238024AbhLGOla (ORCPT ); Tue, 7 Dec 2021 09:41:30 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10190"; a="237528429" X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="237528429" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Dec 2021 06:37:58 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="657725082" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 07 Dec 2021 06:37:54 -0800 From: Heikki Krogerus To: "Rafael J. Wysocki" , Greg Kroah-Hartman Cc: Andy Shevchenko , Sakari Ailus , Prashant Malani , linux-acpi@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/5] acpi: Store the Physical Location of Device (_PLD) information Date: Tue, 7 Dec 2021 17:37:53 +0300 Message-Id: <20211207143757.21895-2-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> References: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This will remove the need for the drivers to always evaluate the _PLD separately. Because the _PLD may be shared between devices - for example the USB2 and USB3 ports that share the same connector have always the same _PLD - every unique _PLD that is detected is registered as a single entry and stored in a dedicated list. Then each of those entries will hold a list of devices that share the location - have identical _PLD. The location entry can be acquired with a new function acpi_device_get_location(). The location structure that the function returns contrains the _PLD of the device and the list the other devices that share it. Signed-off-by: Heikki Krogerus --- drivers/acpi/scan.c | 79 +++++++++++++++++++++++++++++++++++++++++ include/acpi/acpi_bus.h | 14 ++++++++ 2 files changed, 93 insertions(+) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 5991dddbc9ceb..9946ca4451ebc 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "internal.h" @@ -42,6 +43,8 @@ static LIST_HEAD(acpi_scan_handlers_list); DEFINE_MUTEX(acpi_device_lock); LIST_HEAD(acpi_wakeup_device_list); static DEFINE_MUTEX(acpi_hp_context_lock); +static LIST_HEAD(acpi_location_list); +static DEFINE_MUTEX(acpi_location_lock); /* * The UART device described by the SPCR table is the only object which needs @@ -485,6 +488,7 @@ static void acpi_device_del(struct acpi_device *device) break; } + list_del(&device->location_list); list_del(&device->wakeup_list); mutex_unlock(&acpi_device_lock); @@ -654,6 +658,78 @@ static int acpi_tie_acpi_dev(struct acpi_device *adev) return 0; } +static void acpi_store_device_location(struct acpi_device *adev) +{ + struct acpi_device_location *location; + struct acpi_pld_info *pld; + acpi_status status; + u32 crc; + + status = acpi_get_physical_device_location(adev->handle, &pld); + if (ACPI_FAILURE(status)) + return; + + crc = crc32(~0, pld, sizeof(*pld)); + + mutex_lock(&acpi_location_lock); + + list_for_each_entry(location, &acpi_location_list, node) { + if (location->pld_crc == crc) { + ACPI_FREE(pld); + goto out_add_to_location; + } + } + + /* The location does not exist yet so creating it. */ + + location = kzalloc(sizeof(*location), GFP_KERNEL); + if (!location) { + acpi_handle_err(adev->handle, "Unable to store location\n"); + goto err_unlock; + } + + list_add_tail(&location->node, &acpi_location_list); + INIT_LIST_HEAD(&location->devices); + location->pld = pld; + location->pld_crc = crc; + +out_add_to_location: + list_add_tail(&adev->location_list, &location->devices); + +err_unlock: + mutex_unlock(&acpi_location_lock); +} + +/** + * acpi_device_get_location - Get the device location + * @adev: ACPI device handle + * + * Returns the location of @adev when it's known. The location is known for all + * ACPI devices that have _PLD (Physical Location of Device). When the location + * is not known, the function returns NULL. + */ +struct acpi_device_location *acpi_device_get_location(struct acpi_device *adev) +{ + struct acpi_device_location *location; + struct list_head *tmp; + + mutex_lock(&acpi_location_lock); + + list_for_each_entry(location, &acpi_location_list, node) { + list_for_each(tmp, &location->devices) { + if (tmp == &adev->location_list) + goto out_unlock; + } + } + location = NULL; + +out_unlock: + mutex_unlock(&acpi_location_lock); + + return location; +} +EXPORT_SYMBOL_GPL(acpi_device_get_location); + static int __acpi_device_add(struct acpi_device *device, void (*release)(struct device *)) { @@ -670,6 +746,7 @@ static int __acpi_device_add(struct acpi_device *device, INIT_LIST_HEAD(&device->wakeup_list); INIT_LIST_HEAD(&device->physical_node_list); INIT_LIST_HEAD(&device->del_list); + INIT_LIST_HEAD(&device->location_list); mutex_init(&device->physical_node_lock); mutex_lock(&acpi_device_lock); @@ -712,6 +789,8 @@ static int __acpi_device_add(struct acpi_device *device, if (device->wakeup.flags.valid) list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); + acpi_store_device_location(device); + mutex_unlock(&acpi_device_lock); if (device->parent) diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index d6fe27b695c3d..1a4af747198a4 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -354,6 +354,13 @@ struct acpi_device_data { struct list_head subnodes; }; +struct acpi_device_location { + u32 pld_crc; + struct acpi_pld_info *pld; + struct list_head node; + struct list_head devices; +}; + struct acpi_gpio_mapping; /* Device */ @@ -366,6 +373,7 @@ struct acpi_device { struct list_head node; struct list_head wakeup_list; struct list_head del_list; + struct list_head location_list; struct acpi_device_status status; struct acpi_device_flags flags; struct acpi_device_pnp pnp; @@ -731,11 +739,17 @@ static inline void acpi_bus_put_acpi_device(struct acpi_device *adev) { acpi_dev_put(adev); } + +struct acpi_device_location *acpi_device_get_location(struct acpi_device *adev); #else /* CONFIG_ACPI */ static inline int register_acpi_bus_type(void *bus) { return 0; } static inline int unregister_acpi_bus_type(void *bus) { return 0; } +static inline struct acpi_device_location *acpi_device_get_location(struct acpi_device *adev) +{ + return NULL; +} #endif /* CONFIG_ACPI */ #endif /*__ACPI_BUS_H__*/ From patchwork Tue Dec 7 14:37:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 522463 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B76FC433EF for ; Tue, 7 Dec 2021 14:38:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237994AbhLGOle (ORCPT ); Tue, 7 Dec 2021 09:41:34 -0500 Received: from mga03.intel.com ([134.134.136.65]:48408 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237989AbhLGOlc (ORCPT ); Tue, 7 Dec 2021 09:41:32 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10190"; a="237528438" X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="237528438" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Dec 2021 06:38:01 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="657725100" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 07 Dec 2021 06:37:59 -0800 From: Heikki Krogerus To: "Rafael J. Wysocki" , Greg Kroah-Hartman Cc: Andy Shevchenko , Sakari Ailus , Prashant Malani , linux-acpi@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/5] usb: Use the cached ACPI _PLD entry Date: Tue, 7 Dec 2021 17:37:54 +0300 Message-Id: <20211207143757.21895-3-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> References: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The _PLD is now stored, so there is no need to separately evaluate it. Signed-off-by: Heikki Krogerus --- drivers/usb/core/usb-acpi.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c index 50b2fc7fcc0e3..3b21c15be548f 100644 --- a/drivers/usb/core/usb-acpi.c +++ b/drivers/usb/core/usb-acpi.c @@ -176,22 +176,19 @@ usb_acpi_get_companion_for_port(struct usb_port *port_dev) static struct acpi_device * usb_acpi_find_companion_for_port(struct usb_port *port_dev) { + struct acpi_device_location *location; struct acpi_device *adev; - struct acpi_pld_info *pld; - acpi_handle *handle; - acpi_status status; adev = usb_acpi_get_companion_for_port(port_dev); if (!adev) return NULL; - handle = adev->handle; - status = acpi_get_physical_device_location(handle, &pld); - if (ACPI_SUCCESS(status) && pld) { - port_dev->location = USB_ACPI_LOCATION_VALID - | pld->group_token << 8 | pld->group_position; - port_dev->connect_type = usb_acpi_get_connect_type(handle, pld); - ACPI_FREE(pld); + location = acpi_device_get_location(adev); + if (location) { + port_dev->location = USB_ACPI_LOCATION_VALID | + location->pld->group_token << 8 | + location->pld->group_position; + port_dev->connect_type = usb_acpi_get_connect_type(adev->handle, location->pld); } return adev; From patchwork Tue Dec 7 14:37:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 521883 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D257C433F5 for ; Tue, 7 Dec 2021 14:38:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238045AbhLGOlh (ORCPT ); Tue, 7 Dec 2021 09:41:37 -0500 Received: from mga03.intel.com ([134.134.136.65]:48412 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237998AbhLGOlf (ORCPT ); Tue, 7 Dec 2021 09:41:35 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10190"; a="237528445" X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="237528445" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Dec 2021 06:38:05 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="657725119" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 07 Dec 2021 06:38:02 -0800 From: Heikki Krogerus To: "Rafael J. Wysocki" , Greg Kroah-Hartman Cc: Andy Shevchenko , Sakari Ailus , Prashant Malani , linux-acpi@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/5] usb: Link the ports to the connectors they are attached to Date: Tue, 7 Dec 2021 17:37:55 +0300 Message-Id: <20211207143757.21895-4-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> References: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Creating link to the USB Type-C connector for every new port that is added when possible. Signed-off-by: Heikki Krogerus --- Documentation/ABI/testing/sysfs-bus-usb | 9 +++++++ drivers/usb/core/port.c | 32 +++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index 2ebe5708b4bc0..7efe31ed3a25c 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -244,6 +244,15 @@ Description: is permitted, "u2" if only u2 is permitted, "u1_u2" if both u1 and u2 are permitted. +What: /sys/bus/usb/devices/...//port/connector +Date: December 2021 +Contact: Heikki Krogerus +Description: + Link to the USB Type-C connector when available. This link is + only created when USB Type-C Connector Class is enabled, and + only if the system firmware is capable of describing the + connection between a port and its connector. + What: /sys/bus/usb/devices/.../power/usb2_lpm_l1_timeout Date: May 2013 Contact: Mathias Nyman diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index dfcca9c876c73..c2bbf97a79bec 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -9,6 +9,7 @@ #include #include +#include #include "hub.h" @@ -528,6 +529,32 @@ static void find_and_link_peer(struct usb_hub *hub, int port1) link_peers_report(port_dev, peer); } +static int connector_bind(struct device *dev, struct device *connector, void *data) +{ + int ret; + + ret = sysfs_create_link(&dev->kobj, &connector->kobj, "connector"); + if (ret) + return ret; + + ret = sysfs_create_link(&connector->kobj, &dev->kobj, dev_name(dev)); + if (ret) + sysfs_remove_link(&dev->kobj, "connector"); + + return ret; +} + +static void connector_unbind(struct device *dev, struct device *connector, void *data) +{ + sysfs_remove_link(&connector->kobj, dev_name(dev)); + sysfs_remove_link(&dev->kobj, "connector"); +} + +static const struct component_ops connector_ops = { + .bind = connector_bind, + .unbind = connector_unbind, +}; + int usb_hub_create_port_device(struct usb_hub *hub, int port1) { struct usb_port *port_dev; @@ -577,6 +604,10 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1) find_and_link_peer(hub, port1); + retval = component_add(&port_dev->dev, &connector_ops); + if (retval) + dev_warn(&port_dev->dev, "failed to add component\n"); + /* * Enable runtime pm and hold a refernce that hub_configure() * will drop once the PM_QOS_NO_POWER_OFF flag state has been set @@ -619,5 +650,6 @@ void usb_hub_remove_port_device(struct usb_hub *hub, int port1) peer = port_dev->peer; if (peer) unlink_peers(port_dev, peer); + component_del(&port_dev->dev, &connector_ops); device_unregister(&port_dev->dev); } From patchwork Tue Dec 7 14:37:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 521882 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6ECCBC433FE for ; Tue, 7 Dec 2021 14:38:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238108AbhLGOlp (ORCPT ); Tue, 7 Dec 2021 09:41:45 -0500 Received: from mga03.intel.com ([134.134.136.65]:48419 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238110AbhLGOll (ORCPT ); Tue, 7 Dec 2021 09:41:41 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10190"; a="237528457" X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="237528457" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Dec 2021 06:38:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="657725171" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 07 Dec 2021 06:38:08 -0800 From: Heikki Krogerus To: "Rafael J. Wysocki" , Greg Kroah-Hartman Cc: Andy Shevchenko , Sakari Ailus , Prashant Malani , linux-acpi@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 5/5] usb: Remove usb_for_each_port() Date: Tue, 7 Dec 2021 17:37:57 +0300 Message-Id: <20211207143757.21895-6-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> References: <20211207143757.21895-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org There are no more users for the function. Signed-off-by: Heikki Krogerus --- drivers/usb/core/usb.c | 46 ------------------------------------------ include/linux/usb.h | 9 --------- 2 files changed, 55 deletions(-) diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 62368c4ed37af..2ce3667ec6fae 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -398,52 +398,6 @@ int usb_for_each_dev(void *data, int (*fn)(struct usb_device *, void *)) } EXPORT_SYMBOL_GPL(usb_for_each_dev); -struct each_hub_arg { - void *data; - int (*fn)(struct device *, void *); -}; - -static int __each_hub(struct usb_device *hdev, void *data) -{ - struct each_hub_arg *arg = (struct each_hub_arg *)data; - struct usb_hub *hub; - int ret = 0; - int i; - - hub = usb_hub_to_struct_hub(hdev); - if (!hub) - return 0; - - mutex_lock(&usb_port_peer_mutex); - - for (i = 0; i < hdev->maxchild; i++) { - ret = arg->fn(&hub->ports[i]->dev, arg->data); - if (ret) - break; - } - - mutex_unlock(&usb_port_peer_mutex); - - return ret; -} - -/** - * usb_for_each_port - interate over all USB ports in the system - * @data: data pointer that will be handed to the callback function - * @fn: callback function to be called for each USB port - * - * Iterate over all USB ports and call @fn for each, passing it @data. If it - * returns anything other than 0, we break the iteration prematurely and return - * that value. - */ -int usb_for_each_port(void *data, int (*fn)(struct device *, void *)) -{ - struct each_hub_arg arg = {data, fn}; - - return usb_for_each_dev(&arg, __each_hub); -} -EXPORT_SYMBOL_GPL(usb_for_each_port); - /** * usb_release_dev - free a usb device structure when all users of it are finished. * @dev: device that's been disconnected diff --git a/include/linux/usb.h b/include/linux/usb.h index 7ccaa76a9a968..200b7b79acb56 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -875,15 +875,6 @@ extern struct usb_host_interface *usb_find_alt_setting( unsigned int iface_num, unsigned int alt_num); -#if IS_REACHABLE(CONFIG_USB) -int usb_for_each_port(void *data, int (*fn)(struct device *, void *)); -#else -static inline int usb_for_each_port(void *data, int (*fn)(struct device *, void *)) -{ - return 0; -} -#endif - /* port claiming functions */ int usb_hub_claim_port(struct usb_device *hdev, unsigned port1, struct usb_dev_state *owner);