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  1. 19 1月, 2015 4 次提交
  3. 05 1月, 2015 4 次提交
  5. 17 12月, 2014 1 次提交
    • M
      iommu/exynos: Fix arm64 allmodconfig build · 20911ce6
      由 Mark Brown 提交于 
      The Exynos IOMMU driver uses the ARM specific dmac_flush_range() and
outer_flush_range() functions. This breaks the build on arm64 allmodconfig
in -next since support has been merged for some Exynos ARMv8 SoCs. Add a
dependency on ARM to keep things building until either the driver has the
ARM dependencies removed or the ARMv8 architecture code implements these
ARM specific APIs.
Signed-off-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
      20911ce6
  7. 16 12月, 2014 3 次提交
  9. 14 12月, 2014 1 次提交
  11. 05 12月, 2014 1 次提交
  13. 04 12月, 2014 1 次提交
    • T
      memory: Add NVIDIA Tegra memory controller support · 89184651
      由 Thierry Reding 提交于 
      The memory controller on NVIDIA Tegra exposes various knobs that can be
used to tune the behaviour of the clients attached to it.

Currently this driver sets up the latency allowance registers to the HW
defaults. Eventually an API should be exported by this driver (via a
custom API or a generic subsystem) to allow clients to register latency
requirements.

This driver also registers an IOMMU (SMMU) that's implemented by the
memory controller. It is supported on Tegra30, Tegra114 and Tegra124
currently. Tegra20 has a GART instead.

The Tegra SMMU operates on memory clients and SWGROUPs. A memory client
is a unidirectional, special-purpose DMA master. A SWGROUP represents a
set of memory clients that form a logical functional unit corresponding
to a single device. Typically a device has two clients: one client for
read transactions and one client for write transactions, but there are
also devices that have only read clients, but many of them (such as the
display controllers).

Because there is no 1:1 relationship between memory clients and devices
the driver keeps a table of memory clients and the SWGROUPs that they
belong to per SoC. Note that this is an exception and due to the fact
that the SMMU is tightly integrated with the rest of the Tegra SoC. The
use of these tables is discouraged in drivers for generic IOMMU devices
such as the ARM SMMU because the same IOMMU could be used in any number
of SoCs and keeping such tables for each SoC would not scale.
Acked-by: NJoerg Roedel <jroedel@suse.de>
Signed-off-by: NThierry Reding <treding@nvidia.com>
      89184651
  15. 02 12月, 2014 5 次提交
  17. 23 11月, 2014 1 次提交
  19. 18 11月, 2014 7 次提交
  21. 14 11月, 2014 5 次提交
  23. 12 11月, 2014 1 次提交
    • O
      iommu/amd: Fix accounting of device_state · 1c51099a
      由 Oded Gabbay 提交于 
      This patch fixes a bug in the accounting of the
device_state.  In the current code, the device_state was put
(decremented) too many times, which sometimes lead to the
driver getting stuck permanently in put_device_state_wait().
That happen because the device_state->count would go below
zero, which is never supposed to happen.

The root cause is that the device_state was decremented in
put_pasid_state() and put_pasid_state_wait() but also in all
the functions that call those functions. Therefore, the
device_state was decremented twice in each of these code
paths.

The fix is to decouple the device_state accounting from the
pasid_state accounting - remove the call to
put_device_state() from the put_pasid_state() and the
put_pasid_state_wait())
Signed-off-by: NOded Gabbay <oded.gabbay@amd.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
      1c51099a
  25. 06 11月, 2014 1 次提交
    • L
      x86/vt-d: Fix incorrect bit operations in setting values · 1a2262f9
      由 Li, Zhen-Hua 提交于 
      The function context_set_address_root() and set_root_value are setting new
address in a wrong way, and this patch is trying to fix this problem.

According to Intel Vt-d specs(Feb 2011, Revision 1.3), Chapter 9.1 and 9.2,
field ctp in root entry is using bits 12:63, field asr in context entry is
using bits 12:63.

To set these fields, the following functions are used:
static inline void context_set_address_root(struct context_entry *context,
        unsigned long value);
and
static inline void set_root_value(struct root_entry *root, unsigned long value)

But they are using an invalid method to set these fields, in current code, only
a '|' operator is used to set it. This will not set the asr to the expected
value if it has an old value.

For example:
Before calling this function,
	context->lo = 0x3456789012111;
	value = 0x123456789abcef12;

After we call context_set_address_root(context, value), expected result is
	context->lo == 0x123456789abce111;

But the actual result is:
	context->lo == 0x1237577f9bbde111;

So we need to clear bits 12:63 before setting the new value, this will fix
this problem.
Signed-off-by: NLi, Zhen-Hua <zhen-hual@hp.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
      1a2262f9
  27. 05 11月, 2014 1 次提交
  29. 04 11月, 2014 4 次提交