From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750947AbdBBErx (ORCPT ); Wed, 1 Feb 2017 23:47:53 -0500 Received: from mail-qt0-f170.google.com ([209.85.216.170]:35538 "EHLO mail-qt0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750861AbdBBEru (ORCPT ); Wed, 1 Feb 2017 23:47:50 -0500 From: Anup Patel To: Vinod Koul , Rob Herring , Mark Rutland , Herbert Xu , "David S . Miller" , Jassi Brar Cc: Dan Williams , Ray Jui , Scott Branden , Jon Mason , Rob Rice , bcm-kernel-feedback-list@broadcom.com, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-raid@vger.kernel.org, Anup Patel Subject: [PATCH 0/6] Broadcom SBA RAID support Date: Thu, 2 Feb 2017 10:17:10 +0530 Message-Id: <1486010836-25228-1-git-send-email-anup.patel@broadcom.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Broadcom SBA RAID is a stream-based device which provides RAID5/6 offload. It requires a SoC specific ring manager (such as Broadcom FlexRM ring manager) to provide ring-based programming interface. Due to this, the Broadcom SBA RAID driver (mailbox client) implements DMA device having one DMA channel using a set of mailbox channels provided by Broadcom SoC specific ring manager driver (mailbox controller). Important limitations of Broadcom SBA RAID hardware are: 1. Requires disk position instead of disk coefficient 2. Supports only 30 PQ disk coefficients To address limitation #1, we have added raid_gflog table which will help driver convert disk coefficient to disk position. To address limitation #2, we have extended Linux Async Tx APIs to check for available PQ coefficients before doing PQ offload. This patchset is based on Linux-4.10-rc6 and depends on patchset "[PATCH v4 0/2] Broadcom FlexRM ring manager support" It is also available at sba-raid-v1 branch of https://github.com/Broadcom/arm64-linux.git Anup Patel (6): mailbox: Add new API mbox_channel_device() for clients lib/raid6: Add log-of-2 table for RAID6 HW requiring disk position async_tx: Handle DMA devices having support for fewer PQ coefficients async_tx: Fix DMA_PREP_FENCE usage in do_async_gen_syndrome() dmaengine: Add Broadcom SBA RAID driver dt-bindings: Add DT bindings document for Broadcom SBA RAID driver .../devicetree/bindings/dma/brcm,iproc-sba.txt | 29 + crypto/async_tx/async_pq.c | 8 +- crypto/async_tx/async_raid6_recov.c | 12 +- drivers/dma/Kconfig | 13 + drivers/dma/Makefile | 1 + drivers/dma/bcm-sba-raid.c | 1309 ++++++++++++++++++++ drivers/mailbox/mailbox.c | 21 + include/linux/dmaengine.h | 19 + include/linux/mailbox_client.h | 1 + include/linux/raid/pq.h | 4 + lib/raid6/mktables.c | 20 + 11 files changed, 1432 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/dma/brcm,iproc-sba.txt create mode 100644 drivers/dma/bcm-sba-raid.c -- 2.7.4