linux-kernel - [PATCH v2 0/3] mmc: xenon: Fix 2G DMA limitation on AC5 SoC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 30 Nov 2022 15:37:44 +0200
From:   Vadym Kochan <vadym.kochan@...ision.eu>
To:     Hu Ziji <huziji@...vell.com>, Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Elad Nachman <enachman@...vell.com>,
        Chris Packham <chris.packham@...iedtelesis.co.nz>,
        Vadym Kochan <vadym.kochan@...ision.eu>
Subject: [PATCH v2 0/3] mmc: xenon: Fix 2G DMA limitation on AC5 SoC

There is a limitation on AC5 SoC that mmc controller
can't have DMA access over 2G memory, so use SDMA with
a bounce buffer. Swiotlb can't help because on arm64 arch
it reserves memblock's at the end of the memory.

Additionally set mask to 34 bit since on AC5 SoC RAM starts
at 0x2_00000000.

Also add compatible string for AC5 SoC.

v2:
   #1 Add compatible string for dt-bindings

   #2 Use SDMA with a bounce buffer instead of PIO.

Vadym Kochan (3):
  dt-bindings: mmc: xenon: Add compatible string for AC5 SoC
  mmc: sdhci: Export sdhci_set_dma_mask to be used by the drivers
  mmc: xenon: Fix 2G limitation on AC5 SoC

 .../bindings/mmc/marvell,xenon-sdhci.yaml     |  1 +
 drivers/mmc/host/sdhci-xenon.c                | 38 +++++++++++++++++++
 drivers/mmc/host/sdhci-xenon.h                |  3 +-
 drivers/mmc/host/sdhci.c                      |  2 +-
 drivers/mmc/host/sdhci.h                      |  2 +
 5 files changed, 44 insertions(+), 2 deletions(-)

-- 
2.25.1