Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a generic function to lockup addresses in protection domains
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a generic function to unmap pages into protection domains
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a generic function to map pages into protection domains
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a generic function to attach devices to protection domains
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a generic function to detach devices from protection domains
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a generic function for releasing protection domains
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a generic function for allocation protection domains
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a function to remove all devices from a domain
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: inform IOMMU about state change of a device in the driver core
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add helper functions to detach a device from a domain
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: rename set_device_domain() to attach_device()
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: know how many devices are assigned to a domain
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: detect when a driver uses a device assigned otherwise
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Imapct: add a new struct member to 'struct protection_domain'

When using protection domains for dma_ops and KVM its better to know for
which subsystem it was allocated. Add a flags member to struct
protection domain for that purpose.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add a function to flush a domain id on every IOMMU
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: save unneeded logic to add and remove domains to the list

The removal of a protection domain from the iommu_pd_list is not
necessary. Another benefit is that we save complexity because we don't
have to readd it later when the device no longer uses the domain.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: refactoring of iommu_queue_inv_iommu_pages
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: split one function into three

The separate functions are required synchronize commands across all
hardware IOMMUs in the system.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: add code to release a domain id
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: change code to free pagetables from protection domains

The dma_ops_free_pagetable function can only free pagetables from
dma_ops domains. Change that to free pagetables of pure protection
domains.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: function rename

The iommu_map function maps only one page. Make this clear in the
function name.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: prevents data corruption after a failed completion wait loop
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: minor fix
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: minor fix
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: cleanup
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: bugfix
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: bugfix in iommu_map_page function
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The access to the iommu->need_sync member needs to be protected by the
iommu->lock. Otherwise this is a possible race condition. Fix it with
this patch.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

In some rare cases a request can arrive an IOMMU with its originial
requestor id even it is aliased. Handle this by setting the device table
entry to the same protection domain for the original and the aliased
requestor id.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Impact: cleanup
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Impact: fix possible use of stale IO/TLB entries
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Lazy flushing needs to take care of the unmap path too which is not yet
implemented and leads to stale IO/TLB entries. This is fixed by this
patch.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This patch changes the code to use IOMMU_CAP_NPCACHE as a shift and not
as a mask.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This series of patches re-introduces the iommu_num_pages function so that
it can be used by each architecture specific IOMMU implementations.  The
series also changes IOMMU implementations for X86, Alpha, PowerPC and
UltraSparc.  The other implementations are not yet changed because the
modifications required are not obvious and I can't test them on real
hardware.

This patch:

This is a preparation patch for introducing a generic iommu_num_pages function.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

AMD IOMMU can use iommu_device_max_index() instead of the homegrown
function.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

This patch against tip/x86/iommu virtually reverts
2842e5bf. But just reverting the
commit breaks AMD IOMMU so this patch also includes some fixes.

The above commit adds new two options to x86 IOMMU generic kernel boot
options, fullflush and nofullflush. But such change that affects all
the IOMMUs needs more discussion (all IOMMU parties need the chance to
discuss it):

http://lkml.org/lkml/2008/9/19/106Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

x86 has set_bit_string() that does the exact same thing that
set_bit_area() in lib/iommu-helper.c does.

This patch exports set_bit_area() in lib/iommu-helper.c as
iommu_area_reserve(), converts GART, Calgary, and AMD IOMMU to use it.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

The alloc_coherent implementation for AMD IOMMU currently uses
*dev->dma_mask per default. This patch changes it to prefer
dev->coherent_dma_mask if it is set.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>