linux-kernel - [PATCH v3 00/15] Memory controller hot reset

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Date:   Tue, 20 Feb 2018 19:25:13 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 00/15] Memory controller hot reset

Tegra's memory controller has a "memory hot reset" functionality that
blocks all memory transactions for the memory client, which is required
for a proper HW resetting. HW could perform DMA while being reset and this
could lead to a system hang or memory corruption, so here comes the memory
hot reset that blocks all interactions of HW with memory so that it could
be reset safely. Memory hot reset is urgently required for multimedia (on
Tegra20 especially), like GPU or video decoder, as it is quite easy to get
in a trouble without a proper HW reset.

Changelog:

V3:
	Addressed review comments to V2 from Thierry Reding. MC now
	uses generic reset controller API instead of a custom one,
	hence DT changes are now involved and so Rob Herring is CC'd
	for a review.

	Added couple minor cleanup/correction patches.

V2:
	Basically a re-send of V1 with some minor changes.

Dmitry Osipenko (14):
  dt-bindings: arm: tegra: Remove duplicated Tegra30+ MC binding
  dt-bindings: memory: tegra: Document #reset-cells property of the
    Tegra30 MC
  dt-bindings: arm: tegra: Document #reset-cells property of the Tegra20
    MC
  dt-bindings: memory: tegra: Add hot resets definitions
  memory: tegra: Do not handle spurious interrupts
  memory: tegra: Setup interrupts mask before requesting IRQ
  memory: tegra: Apply interrupts mask per SoC
  memory: tegra: Remove unused headers inclusions
  memory: tegra: Squash tegra20-mc into common tegra-mc driver
  memory: tegra: Introduce memory client hot reset
  memory: tegra: Add Tegra124 memory controller hot resets
  memory: tegra: Add Tegra114 memory controller hot resets
  memory: tegra: Add Tegra30 memory controller hot resets
  memory: tegra: Add Tegra20 memory controller hot resets

Thierry Reding (1):
  memory: tegra: Add Tegra210 memory controller hot resets

 .../bindings/arm/tegra/nvidia,tegra20-mc.txt       |  12 +-
 .../bindings/arm/tegra/nvidia,tegra30-mc.txt       |  18 --
 .../memory-controllers/nvidia,tegra30-mc.txt       |   5 +
 drivers/memory/Kconfig                             |  10 -
 drivers/memory/Makefile                            |   1 -
 drivers/memory/tegra/Makefile                      |   1 +
 drivers/memory/tegra/mc.c                          | 358 +++++++++++++++++++--
 drivers/memory/tegra/mc.h                          |  22 ++
 drivers/memory/tegra/tegra114.c                    |  35 ++
 drivers/memory/tegra/tegra124.c                    |  48 +++
 drivers/memory/tegra/tegra20.c                     | 296 +++++++++++++++++
 drivers/memory/tegra/tegra210.c                    |  53 ++-
 drivers/memory/tegra/tegra30.c                     |  35 ++
 drivers/memory/tegra20-mc.c                        | 254 ---------------
 include/dt-bindings/memory/tegra114-mc.h           |  19 ++
 include/dt-bindings/memory/tegra124-mc.h           |  25 ++
 include/dt-bindings/memory/tegra20-mc.h            |  21 ++
 include/dt-bindings/memory/tegra210-mc.h           |  31 ++
 include/dt-bindings/memory/tegra30-mc.h            |  19 ++
 include/soc/tegra/mc.h                             |  37 ++-
 20 files changed, 978 insertions(+), 322 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra30-mc.txt
 create mode 100644 drivers/memory/tegra/tegra20.c
 delete mode 100644 drivers/memory/tegra20-mc.c
 create mode 100644 include/dt-bindings/memory/tegra20-mc.h

-- 
2.16.1