linux-kernel - [PATCH 0/6] Broadcom SBA RAID support

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Date:   Thu,  2 Feb 2017 10:17:10 +0530
From:   Anup Patel <anup.patel@...adcom.com>
To:     Vinod Koul <vinod.koul@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Jassi Brar <jassisinghbrar@...il.com>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        Rob Rice <rob.rice@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-raid@...r.kernel.org, Anup Patel <anup.patel@...adcom.com>
Subject: [PATCH 0/6] Broadcom SBA RAID support

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

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