From patchwork Wed Mar 22 09:21:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 7021 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:604a:0:0:0:0:0 with SMTP id j10csp2248626wrt; Wed, 22 Mar 2023 02:48:18 -0700 (PDT) X-Google-Smtp-Source: AK7set986tMz4n40p7BtBRpUybrN9EU+8uqaqplBXfb015oQjG2DeFwbiYIQ6l1ZuoU0Q8wbpiK9 X-Received: by 2002:a17:906:f101:b0:932:748b:196e with SMTP id gv1-20020a170906f10100b00932748b196emr6341865ejb.45.1679478498129; Wed, 22 Mar 2023 02:48:18 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1679478498; cv=none; d=google.com; s=arc-20160816; b=jcYbKK1aOsLqSEVxuaCyouJtYI+uM1I/tiXVfn2nRUlZ4ii5ps58bl7eDW24R6fWVZ LKT+5xbk80OyoMZ6SUAMKJkd7rZ7etmiVdgLEw8YOB4vCuVYdUs2q9zMdkim8FhTXGGw eVrDGuFBuhQEOXat19zxCNUQ7J6BrSDyxfS0Ta1Q9XxkZj175fmlbnWc0FGcP1NbdtFl fcDYe9zuyIMgjJHAdtnN+wZtVn9Vp9cqPTRoGuBa4spG4t74712qdkRA3o4m3Ylk9JIT ioix4uVdc9xas5Llx0155AnToHnvRHhtjwfnTDYjJtlWOQXO5tZzP/DfGtB+0ypJbZYs 2L+w== 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 :message-id:date:subject:cc:to:from:dkim-signature; bh=tmRlYhR2FZnlnQJCWKDJjWOgiCSSl9pc0u4cFJUJ650=; b=DS/Gr68DZUNGT0QrIjKNLWLFhRdV4WxoWuxm269f+5LvLf19wVBaGaGWq1q/9lpcaR YTvnbFgRFj+isQXGMGpvEO2jPxJ33wzYPX79YgTWtDJLvdJH8seOyZj7HgOL2auGtJL9 q310Gi0J6mnWXS9m5iSkSjpbv/LtVEjEB2psdL0lKLAXyT5UaJQSPKx1p8xm69C1/HsV tm0HjhE6I9t8HDssN+TL8te60X21hbQMVmdDtgYeN9NUIgnADXPj/rmcal4R4z58a1j6 VBgwN7YrE1h14bh9UfemPEwuBXVZhWhrRsXaWQoWrL8dwu90PR92Kbs8NmG2+5YFw8If RUFw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@crapouillou.net header.s=mail header.b=N+K9gfMW; 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=crapouillou.net Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id wb9-20020a170907d50900b00939393bd26asi5792392ejc.835.2023.03.22.02.47.54; Wed, 22 Mar 2023 02:48:18 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@crapouillou.net header.s=mail header.b=N+K9gfMW; 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=crapouillou.net Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230462AbjCVJg0 (ORCPT + 99 others); Wed, 22 Mar 2023 05:36:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230461AbjCVJgX (ORCPT ); Wed, 22 Mar 2023 05:36:23 -0400 Received: from aposti.net (aposti.net [89.234.176.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7251E5F529; Wed, 22 Mar 2023 02:36:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1679476886; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=tmRlYhR2FZnlnQJCWKDJjWOgiCSSl9pc0u4cFJUJ650=; b=N+K9gfMWBsR4tD4u3Hl8NNLbTta8iPSN0ERcGscwa47kxMOGN0UFmiTqCEo0xcvmKjCd74 5QKS+X1c2izruTxdi+aR2/bxOzM5vWFMvFs5pp/4TwXtEn6OYJKWv7KKZgoXYHILsy+BHa 2AW0NIB2KkWH3t1e96o1srWamY7k2XM= From: Paul Cercueil To: Greg Kroah-Hartman , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= Cc: michael.hennerich@analog.com, nuno.sa@analog.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Paul Cercueil Subject: [PATCH v2 0/3] usb: gadget: functionfs: DMABUF import interface Date: Wed, 22 Mar 2023 10:21:15 +0100 Message-Id: <20230322092118.9213-1-paul@crapouillou.net> MIME-Version: 1.0 X-Spam-Status: No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_PASS,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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?1761060845815666013?= X-GMAIL-MSGID: =?utf-8?q?1761060845815666013?= Hi, This small patchset adds three new IOCTLs that can be used to attach, detach, or transfer from/to a DMABUF object. Changes since v1: - patch [2/3] is new. I had to reuse a piece of code that was already duplicated in the driver, so I factorized the code. - Make ffs_dma_resv_lock() static - Add MODULE_IMPORT_NS(DMA_BUF); - The attach/detach functions are now performed without locking the eps_lock spinlock. The transfer function starts with the spinlock unlocked, then locks it before allocating and queueing the USB transfer. Cheers, -Paul Paul Cercueil (3): usb: gadget: Support already-mapped DMA SGs usb: gadget: functionfs: Factorize wait-for-endpoint code usb: gadget: functionfs: Add DMABUF import interface drivers/usb/gadget/function/f_fs.c | 467 ++++++++++++++++++++++++++-- drivers/usb/gadget/udc/core.c | 7 +- include/linux/usb/gadget.h | 2 + include/uapi/linux/usb/functionfs.h | 14 +- 4 files changed, 468 insertions(+), 22 deletions(-)