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: 13183769 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 53E4BC6FD1C for ; Wed, 22 Mar 2023 09:36:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230481AbjCVJgZ (ORCPT ); Wed, 22 Mar 2023 05:36:25 -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 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org 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(-)