From patchwork Wed May 29 10:28:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurentiu Tudor X-Patchwork-Id: 10966753 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 885C9933 for ; Wed, 29 May 2019 10:29:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 79E7F287AB for ; Wed, 29 May 2019 10:29:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6DABA2886B; Wed, 29 May 2019 10:29:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0959D287AB for ; Wed, 29 May 2019 10:29:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726798AbfE2K2y (ORCPT ); Wed, 29 May 2019 06:28:54 -0400 Received: from inva020.nxp.com ([92.121.34.13]:48996 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725956AbfE2K2x (ORCPT ); Wed, 29 May 2019 06:28:53 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 91BC81A0273; Wed, 29 May 2019 12:28:50 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 84F8D1A0118; Wed, 29 May 2019 12:28:50 +0200 (CEST) Received: from fsr-ub1864-101.ea.freescale.net (fsr-ub1864-101.ea.freescale.net [10.171.82.13]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id F20E1205E4; Wed, 29 May 2019 12:28:49 +0200 (CEST) From: laurentiu.tudor@nxp.com To: hch@lst.de, stern@rowland.harvard.edu, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, marex@denx.de Cc: leoyang.li@nxp.com, linux-kernel@vger.kernel.org, robin.murphy@arm.com, noring@nocrew.org, JuergenUrban@gmx.de, Laurentiu Tudor Subject: [PATCH v7 0/5] prerequisites for device reserved local mem rework Date: Wed, 29 May 2019 13:28:38 +0300 Message-Id: <20190529102843.13174-1-laurentiu.tudor@nxp.com> X-Mailer: git-send-email 2.17.1 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Laurentiu Tudor For HCs that have local memory, replace the current DMA API usage with a genalloc generic allocator to manage the mappings for these devices. This is in preparation for dropping the existing "coherent" dma mem declaration APIs. Current implementation was relying on a short circuit in the DMA API that in the end, was acting as an allocator for these type of devices. Only compiled tested, so any volunteers willing to test are most welcome. Thank you! For context, see thread here: https://lkml.org/lkml/2019/4/22/357 Changes in v7: - drop useless __iomem annotation to fix sparse warning - select GENERIC_ALLOCATOR to fix compilation on sh arch Changes in v6: - drop some unneeded initializations (Alan) - use device name for genpool instead of misleading "ohci-hcd" (Alan) - updated some comments (Alan, Fredrik) - added Tested-By tags Changes in v5: - updated first patch to preserve bisectability (Christoph, Greg) - fixed a few more places where dma api was still being used (e.g. td_alloc, ed_alloc) (Fredrik) - included patch from Fredrik adding gen_pool_dma_zalloc() api - added patch that drops HCD_LOCAL_MEM altogether (Greg) - set td_cache / ed_cache to null for devices with local mem (Fredrik) - introduce usb_hcd_setup_local_mem() that sets up the genalloc pool for drivers and updated drivers to use it Changes in v4: - created mapping for local mem - fix genalloc misuse Changes in v3: - rearranged calls into genalloc simplifying the code a bit (Christoph) - dropped RFC prefix Changes in v2: - use genalloc also in core usb (based on comment from Robin) - moved genpool decl to usb_hcd to be accesible from core usb Fredrik Noring (1): lib/genalloc.c: Add gen_pool_dma_zalloc() for zeroed DMA allocations Laurentiu Tudor (4): USB: use genalloc for USB HCs with local memory usb: host: ohci-sm501: init genalloc for local memory usb: host: ohci-tmio: init genalloc for local memory USB: drop HCD_LOCAL_MEM flag drivers/usb/Kconfig | 1 + drivers/usb/core/buffer.c | 17 ++++++++---- drivers/usb/core/hcd.c | 51 ++++++++++++++++++++++++++++------ drivers/usb/host/ehci-hcd.c | 2 +- drivers/usb/host/fotg210-hcd.c | 2 +- drivers/usb/host/ohci-hcd.c | 25 +++++++++++++---- drivers/usb/host/ohci-mem.c | 35 ++++++++++++++++++++--- drivers/usb/host/ohci-sm501.c | 50 +++++++++++++++------------------ drivers/usb/host/ohci-tmio.c | 15 ++++------ drivers/usb/host/ohci.h | 2 ++ drivers/usb/host/uhci-hcd.c | 2 +- include/linux/genalloc.h | 1 + include/linux/usb/hcd.h | 6 +++- lib/genalloc.c | 29 ++++++++++++++++++- 14 files changed, 172 insertions(+), 66 deletions(-) Reviewed-by: Greg Kroah-Hartman