Commit Graph

64 Commits

Author SHA1 Message Date
Cho KyongHo
8f8fcf970e iommu/exynos: Remove prefetch buffer setting
Prefetch buffer is a cache of System MMU 3.x and caches a block of
page table entries to make effect of larger page with small pages.
However, how to control prefetch buffers and the specifications of
prefetch buffers different from minor versions of System MMU v3.
Prefetch buffers must be controled with care because there are some
restrictions in H/W design.

The interface and implementation to initiate prefetch buffers will
be prepared later.

Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-05-13 19:12:53 +02:00
Cho KyongHo
3ad6b7f3a4 iommu/exynos: Fix L2TLB invalidation
L2TLB is 8-way set-associative TLB with 512 entries. The number of
sets is 64.
A single 4KB(small page) translation information is cached
only to a set whose index is the same with the lower 6 bits of the page
frame number.
A single 64KB(large page) translation information can be
cached to any 16 sets whose top two bits of their indices are the same
with the bit [5:4] of the page frame number.
A single 1MB(section) or larger translation information can be cached to
any set in the TLB.

It is required to invalidate entire sets that may cache the target
translation information to guarantee that the L2TLB has no stale data.

Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-05-13 19:12:52 +02:00
Cho KyongHo
734c3c732c iommu/exynos: Allocate lv2 page table from own slab
Since kmalloc() does not guarantee that the allignment of 1KiB when it
allocates 1KiB, it is required to allocate lv2 page table from own
slab that guarantees alignment of 1KiB

Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-05-13 19:12:52 +02:00
Cho KyongHo
61128f08fc iommu/exynos: Change error handling when page table update is failed
This patch changes not to panic on any error when updating page table.
Instead prints error messages with callstack.

Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-05-13 19:12:52 +02:00
Cho KyongHo
7222e8db2d iommu/exynos: Fix build errors
Commit 25e9d28d92 (ARM: EXYNOS: remove system mmu initialization from
exynos tree) removed arch/arm/mach-exynos/mach/sysmmu.h header without
removing remaining use of it from exynos-iommu driver, thus causing a
compilation error.

This patch fixes the error by removing respective include line
from exynos-iommu.c.

Use of __pa and __va macro is changed to virt_to_phys and phys_to_virt
which are recommended in driver code. printk formatting of physical
address is also fixed to %pa.

Also System MMU driver is changed to control only a single instance
of System MMU at a time. Since a single instance of System MMU has only
a single clock descriptor for its clock gating, single address range
for control registers, there is no need to obtain two or more clock
descriptors and ioremaped region.

CC: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-05-13 19:12:51 +02:00
Grant Grundler
ca19243e9c iommu/exynos: Remove dead code (set_prefbuf)
exynos_sysmmu_set_prefbuf() is not called any where.

Signed-off-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-08-14 11:28:45 +02:00
Varun Sethi
bb5547acfc iommu/fsl: Make iova dma_addr_t in the iommu_iova_to_phys API.
This is required in case of PAMU, as it can support a window size of up
to 64G (even on 32bit).

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-04-02 18:20:53 +02:00
Sachin Kamat
77e3835047 iommu/exynos: Make exynos_sysmmu_disable static
'exynos_sysmmu_disable' is used only in this file and can be made static.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-02-07 21:53:29 +01:00
Wei Yongjun
f8ffcc9279 iommu/exynos: use list_del_init instead of list_del/INIT_LIST_HEAD
Using list_del_init() instead of list_del() + INIT_LIST_HEAD().

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-18 12:44:02 +02:00
Sachin Kamat
eb51637b6e iommu/exynos: Fix build error
Fixes the following build error introduced by commit 3177bb76a8
("iommu/exynos: Implement DOMAIN_ATTR_GEOMETRY attribute"):

drivers/iommu/exynos-iommu.c: In function ‘exynos_iommu_domain_init’:
drivers/iommu/exynos-iommu.c:735:2: error: ‘dom’ undeclared
(first use in this function)

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-08-03 16:04:45 +02:00
Linus Torvalds
97027da6ad IOMMU Updates for Linux v3.6-rc1
The most important part of these updates is the IOMMU groups code
 enhancement written by Alex Williamson. It abstracts the problem that a
 given hardware IOMMU can't isolate any given device from any other
 device (e.g. 32 bit PCI devices can't usually be isolated). Devices that
 can't be isolated are grouped together. This code is required for the
 upcoming VFIO framework.
 
 Another IOMMU-API change written by be is the introduction of domain
 attributes. This makes it easier to handle GART-like IOMMUs with the
 IOMMU-API because now the start-address and the size of the domain
 address space can be queried.
 
 Besides that there are a few cleanups and fixes for the NVidia Tegra
 IOMMU drivers and the reworked init-code for the AMD IOMMU. The later is
 from my patch-set to support interrupt remapping. The rest of this
 patch-set requires x86 changes which are not mergabe yet. So full
 support for interrupt remapping with AMD IOMMUs will come in a future
 merge window.
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Merge tag 'iommu-updates-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:
 "The most important part of these updates is the IOMMU groups code
  enhancement written by Alex Williamson.  It abstracts the problem that
  a given hardware IOMMU can't isolate any given device from any other
  device (e.g.  32 bit PCI devices can't usually be isolated).  Devices
  that can't be isolated are grouped together.  This code is required
  for the upcoming VFIO framework.

  Another IOMMU-API change written by me is the introduction of domain
  attributes.  This makes it easier to handle GART-like IOMMUs with the
  IOMMU-API because now the start-address and the size of the domain
  address space can be queried.

  Besides that there are a few cleanups and fixes for the NVidia Tegra
  IOMMU drivers and the reworked init-code for the AMD IOMMU.  The
  latter is from my patch-set to support interrupt remapping.  The rest
  of this patch-set requires x86 changes which are not mergabe yet.  So
  full support for interrupt remapping with AMD IOMMUs will come in a
  future merge window."

* tag 'iommu-updates-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (33 commits)
  iommu/amd: Fix hotplug with iommu=pt
  iommu/amd: Add missing spin_lock initialization
  iommu/amd: Convert iommu initialization to state machine
  iommu/amd: Introduce amd_iommu_init_dma routine
  iommu/amd: Move unmap_flush message to amd_iommu_init_dma_ops()
  iommu/amd: Split enable_iommus() routine
  iommu/amd: Introduce early_amd_iommu_init routine
  iommu/amd: Move informational prinks out of iommu_enable
  iommu/amd: Split out PCI related parts of IOMMU initialization
  iommu/amd: Use acpi_get_table instead of acpi_table_parse
  iommu/amd: Fix sparse warnings
  iommu/tegra: Don't call alloc_pdir with as->lock
  iommu/tegra: smmu: Fix unsleepable memory allocation at alloc_pdir()
  iommu/tegra: smmu: Remove unnecessary sanity check at alloc_pdir()
  iommu/exynos: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/tegra: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/msm: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/omap: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/vt-d: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute
  ...
2012-07-24 16:24:11 -07:00
Masanari Iida
07db04098d iommu: Fix typo in iommu
Correct spelling typo in debug messages and comments
in drivers/iommu.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-07-24 12:58:49 +02:00
Joerg Roedel
3177bb76a8 iommu/exynos: Implement DOMAIN_ATTR_GEOMETRY attribute
Implement the attribute for the Samsung Exynos IOMMU driver.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-11 12:41:10 +02:00
KyongHo Cho
2a96536e77 iommu/exynos: Add iommu driver for EXYNOS Platforms
This is the System MMU driver and IOMMU API implementation for
EXYNOS SoC platforms. EXYNOS platforms has more than 10 System
MMUs dedicated for each multimedia accelerators.

The System MMU driver is already in arc/arm/plat-s5p but it is
moved to drivers/iommu due to Ohad Ben-Cohen gathered IOMMU
drivers there.

Any device driver in EXYNOS platforms that needs to control its
System MMU must call platform_set_sysmmu() to inform System MMU
driver who will control it. platform_set_sysmmu() is defined in
<mach/sysmmu.h>

Signed-off-by: KyongHo Cho <pullip.cho@samsung.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-05-12 05:56:09 +09:00