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banners=-,-,- X-VirusChecked: Checked Received: (qmail 14467 invoked from network); 17 Oct 2022 20:55:27 -0000 Received: from unknown (HELO va32lpfpp01.lenovo.com) (104.232.228.21) by server-12.tower-655.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Oct 2022 20:55:27 -0000 Received: from ilclmmrp01.lenovo.com (ilclmmrp01.mot.com [100.65.83.165]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by va32lpfpp01.lenovo.com (Postfix) with ESMTPS id 4Mrq5B0bKWzhSZf; Mon, 17 Oct 2022 20:55:26 +0000 (UTC) Received: from p1g3.mot.com (unknown [100.64.172.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: w36195) by ilclmmrp01.lenovo.com (Postfix) with ESMTPSA id 4Mrq596lv4zbpxx; Mon, 17 Oct 2022 20:55:25 +0000 (UTC) From: Dan Vacura To: linux-usb@vger.kernel.org Cc: Daniel Scally , Thinh Nguyen , Jeff Vanhoof , stable@vger.kernel.org, Dan Vacura , Greg Kroah-Hartman , Jonathan Corbet , Laurent Pinchart , Felipe Balbi , Paul Elder , Michael Grzeschik , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3 2/6] usb: dwc3: gadget: cancel requests instead of release after missed isoc Date: Mon, 17 Oct 2022 15:54:40 -0500 Message-Id: <20221017205446.523796-3-w36195@motorola.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221017205446.523796-1-w36195@motorola.com> References: <20221017205446.523796-1-w36195@motorola.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746969823214120399?= X-GMAIL-MSGID: =?utf-8?q?1746969823214120399?= From: Jeff Vanhoof arm-smmu related crashes seen after a Missed ISOC interrupt when no_interrupt=1 is used. This can happen if the hardware is still using the data associated with a TRB after the usb_request's ->complete call has been made. Instead of immediately releasing a request when a Missed ISOC interrupt has occurred, this change will add logic to cancel the request instead where it will eventually be released when the END_TRANSFER command has completed. This logic is similar to some of the cleanup done in dwc3_gadget_ep_dequeue. Fixes: 6d8a019614f3 ("usb: dwc3: gadget: check for Missed Isoc from event status") Cc: Signed-off-by: Jeff Vanhoof Co-developed-by: Dan Vacura Signed-off-by: Dan Vacura --- V1 -> V3: - no change, new patch in series drivers/usb/dwc3/core.h | 1 + drivers/usb/dwc3/gadget.c | 38 ++++++++++++++++++++++++++------------ 2 files changed, 27 insertions(+), 12 deletions(-) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 8f9959ba9fd4..9b005d912241 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -943,6 +943,7 @@ struct dwc3_request { #define DWC3_REQUEST_STATUS_DEQUEUED 3 #define DWC3_REQUEST_STATUS_STALLED 4 #define DWC3_REQUEST_STATUS_COMPLETED 5 +#define DWC3_REQUEST_STATUS_MISSED_ISOC 6 #define DWC3_REQUEST_STATUS_UNKNOWN -1 u8 epnum; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 079cd333632e..411532c5c378 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2021,6 +2021,9 @@ static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep) case DWC3_REQUEST_STATUS_STALLED: dwc3_gadget_giveback(dep, req, -EPIPE); break; + case DWC3_REQUEST_STATUS_MISSED_ISOC: + dwc3_gadget_giveback(dep, req, -EXDEV); + break; default: dev_err(dwc->dev, "request cancelled with wrong reason:%d\n", req->status); dwc3_gadget_giveback(dep, req, -ECONNRESET); @@ -3402,21 +3405,32 @@ static bool dwc3_gadget_endpoint_trbs_complete(struct dwc3_ep *dep, struct dwc3 *dwc = dep->dwc; bool no_started_trb = true; - dwc3_gadget_ep_cleanup_completed_requests(dep, event, status); + if (status == -EXDEV) { + struct dwc3_request *tmp; + struct dwc3_request *req; - if (dep->flags & DWC3_EP_END_TRANSFER_PENDING) - goto out; + if (!(dep->flags & DWC3_EP_END_TRANSFER_PENDING)) + dwc3_stop_active_transfer(dep, true, true); - if (!dep->endpoint.desc) - return no_started_trb; + list_for_each_entry_safe(req, tmp, &dep->started_list, list) + dwc3_gadget_move_cancelled_request(req, + DWC3_REQUEST_STATUS_MISSED_ISOC); + } else { + dwc3_gadget_ep_cleanup_completed_requests(dep, event, status); - if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && - list_empty(&dep->started_list) && - (list_empty(&dep->pending_list) || status == -EXDEV)) - dwc3_stop_active_transfer(dep, true, true); - else if (dwc3_gadget_ep_should_continue(dep)) - if (__dwc3_gadget_kick_transfer(dep) == 0) - no_started_trb = false; + if (dep->flags & DWC3_EP_END_TRANSFER_PENDING) + goto out; + + if (!dep->endpoint.desc) + return no_started_trb; + + if (usb_endpoint_xfer_isoc(dep->endpoint.desc) && + list_empty(&dep->started_list) && list_empty(&dep->pending_list)) + dwc3_stop_active_transfer(dep, true, true); + else if (dwc3_gadget_ep_should_continue(dep)) + if (__dwc3_gadget_kick_transfer(dep) == 0) + no_started_trb = false; + } out: /* From patchwork Mon Oct 17 20:54:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Vacura X-Patchwork-Id: 3738 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4ac7:0:0:0:0:0 with SMTP id y7csp1638435wrs; Mon, 17 Oct 2022 13:57:49 -0700 (PDT) X-Google-Smtp-Source: AMsMyM49mYFalVK6I++eDgQ+8Oja4i5BtuUx/Qr/NV0UgP4CVQDYpAJFLMGkMERzmKScE7w5DFXK X-Received: by 2002:a17:902:b417:b0:181:d0e4:3310 with SMTP id x23-20020a170902b41700b00181d0e43310mr13715739plr.134.1666040268775; Mon, 17 Oct 2022 13:57:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1666040268; cv=none; d=google.com; s=arc-20160816; b=fKgbEcNGuU2mPvpxAqbBMHBo5VxZAiqPrAJHKYZ7LIZ6ne8V8fK98IMkUSmdaKKia5 qFv4kMdTcXlJ48pyquwrgNOSKRU0wqoL7z/t1twwhCWZlfIN0OLZo5ejwgbJyMSLB4Qy lk8WmpGcVSfv9DSa5Z0sDEiBXIIVHGVL3tkcy14j3EYgPaDmBqvIPEbyZ8zgvtmn2YBj D5OIpkTq25f6snj6W1NANvBI5Wgs2ONPslZtYiSfzUM4+J2Lwk5xOfTbdidUhQ3sJWE2 YIBf6vCv7F5B7S0cDA1ij0jWp6fIhL/AXipDhTVIMaPhxpRfJfbqptFJCdQP6uELwRTj vkEA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=NOhktsFLmQtBuXz/JYn15RmVV9EK16MqKyqGXNDWM9M=; b=kbWMCJPA7zRWLsUV1hyDjdrVTizTnekYQMoOwt7gWAQ1oz5I/SshpAMFHT4abY3Q3p mr8I9K/KoxGG/tvUJIYnW7e8wF0rMXth6zJtTf3okXedSCAKbW4SeOBY9TbJKS1KCXTh nbux2jdnKf2ErZMlcSXCikyoAxPL2g+V5oQQdeHUE/5b1oWxfRdV3e/llZ7zpsQn7zXS Ve35CcX7bmdMAygJukHwF3htnMC17PdkJyfr8hdp0WMC7Sm+Oht0CPgEy5xP8F8PNiEW RVVcwAFIYlZ0l9Wp7U2H1fA9l9a0IQhlIJR0OH1fN3nCdsRxbobc58ir8m40iNXTQtYN WHBw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@motorola.com header.s=Selector header.b=RSSb7hRk; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=motorola.com Received: from out1.vger.email (out1.vger.email. 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 11647 invoked from network); 17 Oct 2022 20:55:28 -0000 Received: from unknown (HELO va32lpfpp02.lenovo.com) (104.232.228.22) by server-26.tower-686.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Oct 2022 20:55:28 -0000 Received: from ilclmmrp01.lenovo.com (ilclmmrp01.mot.com [100.65.83.165]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by va32lpfpp02.lenovo.com (Postfix) with ESMTPS id 4Mrq5C5wk0z50GGl; Mon, 17 Oct 2022 20:55:27 +0000 (UTC) Received: from p1g3.mot.com (unknown [100.64.172.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: w36195) by ilclmmrp01.lenovo.com (Postfix) with ESMTPSA id 4Mrq5C4N2Nzbpxx; Mon, 17 Oct 2022 20:55:27 +0000 (UTC) From: Dan Vacura To: linux-usb@vger.kernel.org Cc: Daniel Scally , Thinh Nguyen , Jeff Vanhoof , Dan Vacura , stable@vger.kernel.org, Greg Kroah-Hartman , Jonathan Corbet , Laurent Pinchart , Felipe Balbi , Paul Elder , Michael Grzeschik , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3 3/6] usb: gadget: uvc: fix sg handling in error case Date: Mon, 17 Oct 2022 15:54:41 -0500 Message-Id: <20221017205446.523796-4-w36195@motorola.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221017205446.523796-1-w36195@motorola.com> References: <20221017205446.523796-1-w36195@motorola.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746969840874521120?= X-GMAIL-MSGID: =?utf-8?q?1746969840874521120?= If there is a transmission error the buffer will be returned too early, causing a memory fault as subsequent requests for that buffer are still queued up to be sent. Refactor the error handling to wait for the final request to come in before reporting back the buffer to userspace for all transfer types (bulk/isoc/isoc_sg). This ensures userspace knows if the frame was successfully sent. Fixes: e81e7f9a0eb9 ("usb: gadget: uvc: add scatter gather support") Cc: # 859c675d84d4: usb: gadget: uvc: consistently use define for headerlen Cc: # f262ce66d40c: usb: gadget: uvc: use on returned header len in video_encode_isoc_sg Cc: # 61aa709ca58a: usb: gadget: uvc: rework uvcg_queue_next_buffer to uvcg_complete_buffer Cc: # 9b969f93bcef: usb: gadget: uvc: giveback vb2 buffer on req complete Cc: # aef11279888c: usb: gadget: uvc: improve sg exit condition Cc: Signed-off-by: Dan Vacura --- V1 -> V2: - undo error rename - change uvcg_info to uvcg_dbg V2 -> V3: - no changes drivers/usb/gadget/function/uvc_queue.c | 8 +++++--- drivers/usb/gadget/function/uvc_video.c | 18 ++++++++++++++---- 2 files changed, 19 insertions(+), 7 deletions(-) diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index ec500ee499ee..0aa3d7e1f3cc 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -304,6 +304,7 @@ int uvcg_queue_enable(struct uvc_video_queue *queue, int enable) queue->sequence = 0; queue->buf_used = 0; + queue->flags &= ~UVC_QUEUE_DROP_INCOMPLETE; } else { ret = vb2_streamoff(&queue->queue, queue->queue.type); if (ret < 0) @@ -329,10 +330,11 @@ int uvcg_queue_enable(struct uvc_video_queue *queue, int enable) void uvcg_complete_buffer(struct uvc_video_queue *queue, struct uvc_buffer *buf) { - if ((queue->flags & UVC_QUEUE_DROP_INCOMPLETE) && - buf->length != buf->bytesused) { - buf->state = UVC_BUF_STATE_QUEUED; + if (queue->flags & UVC_QUEUE_DROP_INCOMPLETE) { + queue->flags &= ~UVC_QUEUE_DROP_INCOMPLETE; + buf->state = UVC_BUF_STATE_ERROR; vb2_set_plane_payload(&buf->buf.vb2_buf, 0, 0); + vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_ERROR); return; } diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 91a58567beac..dd54841b0b3e 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -88,6 +88,7 @@ uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video, struct uvc_buffer *buf) { void *mem = req->buf; + struct uvc_request *ureq = req->context; int len = video->req_size; int ret; @@ -113,13 +114,14 @@ uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video, video->queue.buf_used = 0; buf->state = UVC_BUF_STATE_DONE; list_del(&buf->queue); - uvcg_complete_buffer(&video->queue, buf); video->fid ^= UVC_STREAM_FID; + ureq->last_buf = buf; video->payload_size = 0; } if (video->payload_size == video->max_payload_size || + video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE || buf->bytesused == video->queue.buf_used) video->payload_size = 0; } @@ -180,7 +182,8 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video, req->length -= len; video->queue.buf_used += req->length - header_len; - if (buf->bytesused == video->queue.buf_used || !buf->sg) { + if (buf->bytesused == video->queue.buf_used || !buf->sg || + video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE) { video->queue.buf_used = 0; buf->state = UVC_BUF_STATE_DONE; buf->offset = 0; @@ -195,6 +198,7 @@ uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video, struct uvc_buffer *buf) { void *mem = req->buf; + struct uvc_request *ureq = req->context; int len = video->req_size; int ret; @@ -209,12 +213,13 @@ uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video, req->length = video->req_size - len; - if (buf->bytesused == video->queue.buf_used) { + if (buf->bytesused == video->queue.buf_used || + video->queue.flags & UVC_QUEUE_DROP_INCOMPLETE) { video->queue.buf_used = 0; buf->state = UVC_BUF_STATE_DONE; list_del(&buf->queue); - uvcg_complete_buffer(&video->queue, buf); video->fid ^= UVC_STREAM_FID; + ureq->last_buf = buf; } } @@ -255,6 +260,11 @@ uvc_video_complete(struct usb_ep *ep, struct usb_request *req) case 0: break; + case -EXDEV: + uvcg_dbg(&video->uvc->func, "VS request missed xfer.\n"); + queue->flags |= UVC_QUEUE_DROP_INCOMPLETE; + break; + case -ESHUTDOWN: /* disconnect from host. */ uvcg_dbg(&video->uvc->func, "VS request cancelled.\n"); uvcg_queue_cancel(queue, 1); From patchwork Mon Oct 17 20:54:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Vacura X-Patchwork-Id: 3740 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4ac7:0:0:0:0:0 with SMTP id y7csp1638756wrs; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 12036 invoked from network); 17 Oct 2022 20:55:30 -0000 Received: from unknown (HELO va32lpfpp01.lenovo.com) (104.232.228.21) by server-19.tower-715.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Oct 2022 20:55:30 -0000 Received: from ilclmmrp01.lenovo.com (ilclmmrp01.mot.com [100.65.83.165]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by va32lpfpp01.lenovo.com (Postfix) with ESMTPS id 4Mrq5F4mHwzhSZf; Mon, 17 Oct 2022 20:55:29 +0000 (UTC) Received: from p1g3.mot.com (unknown [100.64.172.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: w36195) by ilclmmrp01.lenovo.com (Postfix) with ESMTPSA id 4Mrq5F2cJtzbpxx; Mon, 17 Oct 2022 20:55:29 +0000 (UTC) From: Dan Vacura To: linux-usb@vger.kernel.org Cc: Daniel Scally , Thinh Nguyen , Jeff Vanhoof , stable@vger.kernel.org, Dan Vacura , Greg Kroah-Hartman , Jonathan Corbet , Laurent Pinchart , Felipe Balbi , Michael Grzeschik , Paul Elder , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3 4/6] usb: gadget: uvc: fix sg handling during video encode Date: Mon, 17 Oct 2022 15:54:42 -0500 Message-Id: <20221017205446.523796-5-w36195@motorola.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221017205446.523796-1-w36195@motorola.com> References: <20221017205446.523796-1-w36195@motorola.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746969913044826164?= X-GMAIL-MSGID: =?utf-8?q?1746969913044826164?= From: Jeff Vanhoof In uvc_video_encode_isoc_sg, the uvc_request's sg list is incorrectly being populated leading to corrupt video being received by the remote end. When building the sg list the usage of buf->sg's 'dma_length' field is not correct and instead its 'length' field should be used. Fixes: e81e7f9a0eb9 ("usb: gadget: uvc: add scatter gather support") Cc: Signed-off-by: Jeff Vanhoof Signed-off-by: Dan Vacura --- V1 -> V3: - no change, new patch in series drivers/usb/gadget/function/uvc_video.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index dd54841b0b3e..7d4508a83d5d 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -157,10 +157,10 @@ uvc_video_encode_isoc_sg(struct usb_request *req, struct uvc_video *video, sg = sg_next(sg); for_each_sg(sg, iter, ureq->sgt.nents - 1, i) { - if (!len || !buf->sg || !sg_dma_len(buf->sg)) + if (!len || !buf->sg || !buf->sg->length) break; - sg_left = sg_dma_len(buf->sg) - buf->offset; + sg_left = buf->sg->length - buf->offset; part = min_t(unsigned int, len, sg_left); sg_set_page(iter, sg_page(buf->sg), part, buf->offset); From patchwork Mon Oct 17 20:54:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Vacura X-Patchwork-Id: 3741 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4ac7:0:0:0:0:0 with SMTP id y7csp1638876wrs; Mon, 17 Oct 2022 13:59:13 -0700 (PDT) X-Google-Smtp-Source: AMsMyM7zE5Yxjqb1+vJZ1fXCdJd+l59/Z4VmTNdKKdv5Q7+rKUVHWnr9+eTXTPMtN87/iTISxgN+ X-Received: by 2002:a63:1b16:0:b0:46b:8e7:3e0a with SMTP id b22-20020a631b16000000b0046b08e73e0amr12135153pgb.86.1666040353555; Mon, 17 Oct 2022 13:59:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1666040353; cv=none; d=google.com; s=arc-20160816; b=RDd0h4FE0bhsR+NboCy6opnQksR3RdL0XkKIsKZ5z10fYhO1Ny1IPvuHB2asl8t63x JOI8kgL7piplL0BYsYxPKWGWQxyB/pS/bAOvzK3OLXqfyqntyDkvFQuY37BtdTheuOFQ gjDVj0KRJjPkyDimi4ijF/EABzJElaVvtxtF/EWMENC5gJakD1l6czf7fOE6ljacz74A X0pczL4c1mfItmR8XnE7QzWFvO03SPjKDOCcjBTD2/Jdptls1ajC8oDqyMpyVB2Q3hHN 5s9zijPSXsgfTP+Jqbyw2d5PDUT5DdzC5dMQNLFfaWBxgRimlhatCPfmf8iwchHZhQBB Mrdg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=jaIOs9fk+1VScGcZnnxQOBf6SfBAGDU0JdmzRh0R7V4=; b=g/HkdF2oZ4bQZd//12dk+jcQQbJPue7oAkTC2MPTxcZaPkbVGF2Na5yvO1VFT6XWfK 7cxvk/MtGXS0Ho3NxXJLHNRsL5HN7HqSWhARMpqKovmj33/T0djE/tVyCMXmQ8MpemgC NKFvAwczm1Z4UvrYbqbxymmooIt5c/R9tuVnib3OI9NwnVKDIz3X46lhgDOnWbvluHEe XwYnm104mnL+NrW4r1MH1GJMss9RWd2mj0g4GQVzyR2g1LjdMJBUAPD2k24bAPRer7eR mEj7Tf/sixlum0xoP9Ng2xjGlwBvS7ymr8dKMhnfKD9v0t8IZTW6qZ3lvanMs6llf/k7 5+yw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@motorola.com header.s=Selector header.b=YnN7GTPK; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=motorola.com Received: from out1.vger.email (out1.vger.email. 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 729 invoked from network); 17 Oct 2022 20:55:31 -0000 Received: from unknown (HELO ilclpfpp02.lenovo.com) (144.188.128.68) by server-8.tower-635.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Oct 2022 20:55:31 -0000 Received: from ilclmmrp01.lenovo.com (ilclmmrp01.mot.com [100.65.83.165]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ilclpfpp02.lenovo.com (Postfix) with ESMTPS id 4Mrq5H3V4RzfBb2; Mon, 17 Oct 2022 20:55:31 +0000 (UTC) Received: from p1g3.mot.com (unknown [100.64.172.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: w36195) by ilclmmrp01.lenovo.com (Postfix) with ESMTPSA id 4Mrq5H3GPhzbpxx; Mon, 17 Oct 2022 20:55:31 +0000 (UTC) From: Dan Vacura To: linux-usb@vger.kernel.org Cc: Daniel Scally , Thinh Nguyen , Jeff Vanhoof , Dan Vacura , Greg Kroah-Hartman , Jonathan Corbet , Laurent Pinchart , Felipe Balbi , Michael Grzeschik , Paul Elder , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3 5/6] usb: gadget: uvc: make interrupt skip logic configurable Date: Mon, 17 Oct 2022 15:54:43 -0500 Message-Id: <20221017205446.523796-6-w36195@motorola.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221017205446.523796-1-w36195@motorola.com> References: <20221017205446.523796-1-w36195@motorola.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746969929535067132?= X-GMAIL-MSGID: =?utf-8?q?1746969929535067132?= Some UDC hw may not support skipping interrupts, but still support the request. Allow the interrupt frequency to be configurable to the user. Signed-off-by: Dan Vacura --- V1 -> V2: - no change, new patch in series V2 -> V3: - default to baseline value of 4, fix storing the initial value Documentation/ABI/testing/configfs-usb-gadget-uvc | 1 + Documentation/usb/gadget-testing.rst | 2 ++ drivers/usb/gadget/function/f_uvc.c | 3 +++ drivers/usb/gadget/function/u_uvc.h | 1 + drivers/usb/gadget/function/uvc.h | 2 ++ drivers/usb/gadget/function/uvc_configfs.c | 2 ++ drivers/usb/gadget/function/uvc_queue.c | 6 ++++++ drivers/usb/gadget/function/uvc_video.c | 3 ++- 8 files changed, 19 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uvc b/Documentation/ABI/testing/configfs-usb-gadget-uvc index 611b23e6488d..5dfaa3f7f6a4 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uvc +++ b/Documentation/ABI/testing/configfs-usb-gadget-uvc @@ -8,6 +8,7 @@ Description: UVC function directory streaming_maxpacket 1..1023 (fs), 1..3072 (hs/ss) streaming_interval 1..16 function_name string [32] + req_int_skip_div unsigned int =================== ============================= What: /config/usb-gadget/gadget/functions/uvc.name/control diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst index 2278c9ffb74a..f9b5a09be1f4 100644 --- a/Documentation/usb/gadget-testing.rst +++ b/Documentation/usb/gadget-testing.rst @@ -794,6 +794,8 @@ The uvc function provides these attributes in its function directory: sending or receiving when this configuration is selected function_name name of the interface + req_int_skip_div divisor of total requests to aid in calculating + interrupt frequency, 0 indicates all interrupt =================== ================================================ There are also "control" and "streaming" subdirectories, each of which contain diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 6e196e06181e..e40ca26b9c55 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -655,6 +655,8 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f) cpu_to_le16(max_packet_size * max_packet_mult * (opts->streaming_maxburst + 1)); + uvc->config_skip_int_div = opts->req_int_skip_div; + /* Allocate endpoints. */ ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); if (!ep) { @@ -872,6 +874,7 @@ static struct usb_function_instance *uvc_alloc_inst(void) opts->streaming_interval = 1; opts->streaming_maxpacket = 1024; + opts->req_int_skip_div = 4; snprintf(opts->function_name, sizeof(opts->function_name), "UVC Camera"); ret = uvcg_attach_configfs(opts); diff --git a/drivers/usb/gadget/function/u_uvc.h b/drivers/usb/gadget/function/u_uvc.h index 24b8681b0d6f..6f73bd5638ed 100644 --- a/drivers/usb/gadget/function/u_uvc.h +++ b/drivers/usb/gadget/function/u_uvc.h @@ -24,6 +24,7 @@ struct f_uvc_opts { unsigned int streaming_interval; unsigned int streaming_maxpacket; unsigned int streaming_maxburst; + unsigned int req_int_skip_div; unsigned int control_interface; unsigned int streaming_interface; diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h index 40226b1f7e14..29f9477c92cc 100644 --- a/drivers/usb/gadget/function/uvc.h +++ b/drivers/usb/gadget/function/uvc.h @@ -107,6 +107,7 @@ struct uvc_video { spinlock_t req_lock; unsigned int req_int_count; + unsigned int req_int_skip_div; void (*encode) (struct usb_request *req, struct uvc_video *video, struct uvc_buffer *buf); @@ -155,6 +156,7 @@ struct uvc_device { /* Events */ unsigned int event_length; unsigned int event_setup_out : 1; + unsigned int config_skip_int_div; }; static inline struct uvc_device *to_uvc(struct usb_function *f) diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index 4303a3283ba0..419e926ab57e 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -2350,6 +2350,7 @@ UVC_ATTR(f_uvc_opts_, cname, cname) UVCG_OPTS_ATTR(streaming_interval, streaming_interval, 16); UVCG_OPTS_ATTR(streaming_maxpacket, streaming_maxpacket, 3072); UVCG_OPTS_ATTR(streaming_maxburst, streaming_maxburst, 15); +UVCG_OPTS_ATTR(req_int_skip_div, req_int_skip_div, UINT_MAX); #undef UVCG_OPTS_ATTR @@ -2399,6 +2400,7 @@ static struct configfs_attribute *uvc_attrs[] = { &f_uvc_opts_attr_streaming_interval, &f_uvc_opts_attr_streaming_maxpacket, &f_uvc_opts_attr_streaming_maxburst, + &f_uvc_opts_attr_req_int_skip_div, &f_uvc_opts_string_attr_function_name, NULL, }; diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index 0aa3d7e1f3cc..02559906a55a 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -63,6 +63,12 @@ static int uvc_queue_setup(struct vb2_queue *vq, */ nreq = DIV_ROUND_UP(DIV_ROUND_UP(sizes[0], 2), req_size); nreq = clamp(nreq, 4U, 64U); + if (0 == video->uvc->config_skip_int_div) { + video->req_int_skip_div = nreq; + } else { + video->req_int_skip_div = min_t(unsigned int, nreq, + video->uvc->config_skip_int_div); + } video->uvc_num_requests = nreq; return 0; diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 7d4508a83d5d..9ff02691b6a4 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -423,7 +423,8 @@ static void uvcg_video_pump(struct work_struct *work) if (list_empty(&video->req_free) || buf->state == UVC_BUF_STATE_DONE || !(video->req_int_count % - DIV_ROUND_UP(video->uvc_num_requests, 4))) { + DIV_ROUND_UP(video->uvc_num_requests, + video->req_int_skip_div))) { video->req_int_count = 0; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 840 invoked from network); 17 Oct 2022 20:55:33 -0000 Received: from unknown (HELO ilclpfpp02.lenovo.com) (144.188.128.68) by server-8.tower-635.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Oct 2022 20:55:33 -0000 Received: from ilclmmrp01.lenovo.com (ilclmmrp01.mot.com [100.65.83.165]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ilclpfpp02.lenovo.com (Postfix) with ESMTPS id 4Mrq5K2lfWzc3HP; Mon, 17 Oct 2022 20:55:33 +0000 (UTC) Received: from p1g3.mot.com (unknown [100.64.172.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: w36195) by ilclmmrp01.lenovo.com (Postfix) with ESMTPSA id 4Mrq5K17Hlzbpxx; Mon, 17 Oct 2022 20:55:33 +0000 (UTC) From: Dan Vacura To: linux-usb@vger.kernel.org Cc: Daniel Scally , Thinh Nguyen , Jeff Vanhoof , Dan Vacura , Greg Kroah-Hartman , Jonathan Corbet , Laurent Pinchart , Felipe Balbi , Michael Grzeschik , Paul Elder , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v3 6/6] usb: gadget: uvc: add configfs option for sg support Date: Mon, 17 Oct 2022 15:54:44 -0500 Message-Id: <20221017205446.523796-7-w36195@motorola.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221017205446.523796-1-w36195@motorola.com> References: <20221017205446.523796-1-w36195@motorola.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746969936689107648?= X-GMAIL-MSGID: =?utf-8?q?1746969936689107648?= The scatter gather support doesn't appear to work well with some UDC hw. Add the ability to turn on the feature depending on the controller in use. Signed-off-by: Dan Vacura Reviewed-by: Daniel Scally Tested-by: Daniel Scally --- V1 -> V2: - no change, new patch in serie V2 -> V3: - default on, same as baseline Documentation/ABI/testing/configfs-usb-gadget-uvc | 1 + Documentation/usb/gadget-testing.rst | 2 ++ drivers/usb/gadget/function/f_uvc.c | 2 ++ drivers/usb/gadget/function/u_uvc.h | 1 + drivers/usb/gadget/function/uvc_configfs.c | 2 ++ drivers/usb/gadget/function/uvc_queue.c | 4 ++-- 6 files changed, 10 insertions(+), 2 deletions(-) diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uvc b/Documentation/ABI/testing/configfs-usb-gadget-uvc index 5dfaa3f7f6a4..839a75fc28ee 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uvc +++ b/Documentation/ABI/testing/configfs-usb-gadget-uvc @@ -9,6 +9,7 @@ Description: UVC function directory streaming_interval 1..16 function_name string [32] req_int_skip_div unsigned int + sg_supported 0..1 =================== ============================= What: /config/usb-gadget/gadget/functions/uvc.name/control diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst index f9b5a09be1f4..8e3072d6a590 100644 --- a/Documentation/usb/gadget-testing.rst +++ b/Documentation/usb/gadget-testing.rst @@ -796,6 +796,8 @@ The uvc function provides these attributes in its function directory: function_name name of the interface req_int_skip_div divisor of total requests to aid in calculating interrupt frequency, 0 indicates all interrupt + sg_supported allow for scatter gather to be used if the UDC + hw supports it =================== ================================================ There are also "control" and "streaming" subdirectories, each of which contain diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index e40ca26b9c55..d08ebe3ffeb2 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -656,6 +656,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f) (opts->streaming_maxburst + 1)); uvc->config_skip_int_div = opts->req_int_skip_div; + uvc->video.queue.use_sg = opts->sg_supported; /* Allocate endpoints. */ ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); @@ -875,6 +876,7 @@ static struct usb_function_instance *uvc_alloc_inst(void) opts->streaming_interval = 1; opts->streaming_maxpacket = 1024; opts->req_int_skip_div = 4; + opts->sg_supported = 1; snprintf(opts->function_name, sizeof(opts->function_name), "UVC Camera"); ret = uvcg_attach_configfs(opts); diff --git a/drivers/usb/gadget/function/u_uvc.h b/drivers/usb/gadget/function/u_uvc.h index 6f73bd5638ed..5ccced629925 100644 --- a/drivers/usb/gadget/function/u_uvc.h +++ b/drivers/usb/gadget/function/u_uvc.h @@ -25,6 +25,7 @@ struct f_uvc_opts { unsigned int streaming_maxpacket; unsigned int streaming_maxburst; unsigned int req_int_skip_div; + unsigned int sg_supported; unsigned int control_interface; unsigned int streaming_interface; diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c index 419e926ab57e..3784c0e02d01 100644 --- a/drivers/usb/gadget/function/uvc_configfs.c +++ b/drivers/usb/gadget/function/uvc_configfs.c @@ -2351,6 +2351,7 @@ UVCG_OPTS_ATTR(streaming_interval, streaming_interval, 16); UVCG_OPTS_ATTR(streaming_maxpacket, streaming_maxpacket, 3072); UVCG_OPTS_ATTR(streaming_maxburst, streaming_maxburst, 15); UVCG_OPTS_ATTR(req_int_skip_div, req_int_skip_div, UINT_MAX); +UVCG_OPTS_ATTR(sg_supported, sg_supported, 1); #undef UVCG_OPTS_ATTR @@ -2401,6 +2402,7 @@ static struct configfs_attribute *uvc_attrs[] = { &f_uvc_opts_attr_streaming_maxpacket, &f_uvc_opts_attr_streaming_maxburst, &f_uvc_opts_attr_req_int_skip_div, + &f_uvc_opts_attr_sg_supported, &f_uvc_opts_string_attr_function_name, NULL, }; diff --git a/drivers/usb/gadget/function/uvc_queue.c b/drivers/usb/gadget/function/uvc_queue.c index 02559906a55a..3c7aa5c4bba2 100644 --- a/drivers/usb/gadget/function/uvc_queue.c +++ b/drivers/usb/gadget/function/uvc_queue.c @@ -149,11 +149,11 @@ int uvcg_queue_init(struct uvc_video_queue *queue, struct device *dev, enum v4l2 queue->queue.buf_struct_size = sizeof(struct uvc_buffer); queue->queue.ops = &uvc_queue_qops; queue->queue.lock = lock; - if (cdev->gadget->sg_supported) { + if (queue->use_sg && cdev->gadget->sg_supported) { queue->queue.mem_ops = &vb2_dma_sg_memops; - queue->use_sg = 1; } else { queue->queue.mem_ops = &vb2_vmalloc_memops; + queue->use_sg = false; } queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY