linux-toradex.git/drivers/iommu/io-pgtable.c, branch v5.17-rc4

iommu/io-pgtable: Add DART pagetable format

2021-08-12T11:15:02+00:00

Apple's DART iommu uses a pagetable format that shares some
similarities with the ones already implemented by io-pgtable.c.
Add a new format variant to support the required differences
so that we don't have to duplicate the pagetable handling code.

Reviewed-by: Alexander Graf 
Reviewed-by: Alyssa Rosenzweig 
Reviewed-by: Robin Murphy 
Signed-off-by: Sven Peter 
Link: https://lore.kernel.org/r/20210803121651.61594-2-sven@svenpeter.dev
Signed-off-by: Joerg Roedel

iommu/amd: Prepare for generic IO page table framework

2021-01-28T15:51:17+00:00

Add initial hook up code to implement generic IO page table framework.

Signed-off-by: Suravee Suthikulpanit 
Link: https://lore.kernel.org/r/20201215073705.123786-3-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel

iommu/io-pgtable-arm: Rationalise TCR handling

2020-01-10T15:52:24+00:00

Although it's conceptually nice for the io_pgtable_cfg to provide a
standard VMSA TCR value, the reality is that no VMSA-compliant IOMMU
looks exactly like an Arm CPU, and they all have various other TCR
controls which io-pgtable can't be expected to understand. Thus since
there is an expectation that drivers will have to add to the given TCR
value anyway, let's strip it down to just the essentials that are
directly relevant to io-pgtable's inner workings - namely the various
sizes and the walk attributes.

Tested-by: Jordan Crouse 
Signed-off-by: Robin Murphy 
[will: Add missing include of bitfield.h]
Signed-off-by: Will Deacon

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234

2019-06-19T15:09:07+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not see http www gnu org
  licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 503 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Reviewed-by: Enrico Weigelt 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de
Signed-off-by: Greg Kroah-Hartman

iommu: io-pgtable: Add ARM Mali midgard MMU page table format

2019-04-12T17:52:38+00:00

ARM Mali midgard GPU is similar to standard 64-bit stage 1 page tables, but
have a few differences. Add a new format type to represent the format. The
input address size is 48-bits and the output address size is 40-bits (and
possibly less?). Note that the later bifrost GPUs follow the standard
64-bit stage 1 format.

The differences in the format compared to 64-bit stage 1 format are:

The 3rd level page entry bits are 0x1 instead of 0x3 for page entries.

The access flags are not read-only and unprivileged, but read and write.
This is similar to stage 2 entries, but the memory attributes field matches
stage 1 being an index.

The nG bit is not set by the vendor driver. This one didn't seem to matter,
but we'll keep it aligned to the vendor driver.

Cc: Will Deacon 
Acked-by: Robin Murphy 
Cc: linux-arm-kernel@lists.infradead.org
Cc: iommu@lists.linux-foundation.org
Acked-by: Alyssa Rosenzweig 
Acked-by: Joerg Roedel 
Signed-off-by: Rob Herring 
Link: https://patchwork.freedesktop.org/patch/msgid/20190409205427.6943-2-robh@kernel.org

iommu: Allow io-pgtable to be used outside of drivers/iommu/

2019-02-11T10:26:48+00:00

Move io-pgtable.h to include/linux/ and export alloc_io_pgtable_ops
and free_io_pgtable_ops. This enables drivers outside drivers/iommu/ to
use the page table library. Specifically, some ARM Mali GPUs use the
ARM page table formats.

Cc: Will Deacon 
Cc: Robin Murphy 
Cc: Joerg Roedel 
Cc: Matthias Brugger 
Cc: Rob Clark 
Cc: linux-arm-kernel@lists.infradead.org
Cc: iommu@lists.linux-foundation.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-arm-msm@vger.kernel.org
Signed-off-by: Rob Herring 
Signed-off-by: Joerg Roedel

iommu/io-pgtable: Fix a brace coding style issue.

2016-04-05T13:34:29+00:00

Fixed a coding style issue.

Signed-off-by: Cosmin-Gabriel Samoila 
Signed-off-by: Joerg Roedel

iommu/io-pgtable: Add helper functions for TLB ops

2016-02-17T14:15:08+00:00

Add some simple wrappers to avoid having the guts of the TLB operations
spilled all over the page table implementations, and to provide a point
to implement extra common functionality.

Acked-by: Will Deacon 
Acked-by: Laurent Pinchart 
Signed-off-by: Robin Murphy 
Signed-off-by: Will Deacon

iommu/io-pgtable: Add ARMv7 short descriptor support

2016-02-17T14:14:57+00:00

Add a nearly-complete ARMv7 short descriptor implementation, omitting
only a few legacy and CPU-centric aspects which shouldn't be necessary
for IOMMU API use anyway.

Reviewed-by: Yong Wu 
Tested-by: Yong Wu 
Signed-off-by: Yong Wu 
Signed-off-by: Robin Murphy 
Signed-off-by: Will Deacon

iommu/io-pgtable-arm: Move init-fn declarations to io-pgtable.h

2015-08-13T17:51:04+00:00

Avoid extern declarations in c files.

Signed-off-by: Joerg Roedel