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path: root/arch/x86/kernel/amd_iommu_init.c
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2009-07-02amd-iommu: set evt_buf_size correctlyJoerg Roedel1-0/+2
The setting of this variable got lost during the suspend/resume implementation. But keeping this variable zero causes a divide-by-zero error in the interrupt handler. This patch fixes this. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-07-02amd-iommu: handle alias entries correctly in init codeJoerg Roedel1-4/+7
An alias entry in the ACPI table means that the device can send requests to the IOMMU with both device ids, its own and the alias. This is not handled properly in the ACPI init code. This patch fixes the issue. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-16amd-iommu: resume cleanupChris Wright1-7/+1
Now that enable_iommus() will call iommu_disable() for each iommu, the call to disable_iommus() during resume is redundant. Also, the order for an invalidation is to invalidate device table entries first, then domain translations. Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-15amd-iommu: set event buffer head and tail to 0 manuallyJoerg Roedel1-0/+4
These registers may contain values from previous kernels. So reset them to known values before enable the event buffer again. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-15amd-iommu: disable cmd buffer and evt logging before reprogramming iommuChris Wright1-0/+9
The IOMMU spec states that IOMMU behavior may be undefined when the IOMMU registers are rewritten while command or event buffer is enabled. Disable them in IOMMU disable path. Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-06-15amd-iommu: disable IOMMU hardware on shutdownJoerg Roedel1-0/+5
When the IOMMU stays enabled the BIOS may not be able to finish the machine shutdown properly. So disable the hardware on shutdown. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28Merge branches 'amd-iommu/fixes', 'amd-iommu/debug', ↵Joerg Roedel1-88/+179
'amd-iommu/suspend-resume' and 'amd-iommu/extended-allocator' into amd-iommu/2.6.31 Conflicts: arch/x86/kernel/amd_iommu.c arch/x86/kernel/amd_iommu_init.c
2009-05-28amd-iommu: remove amd_iommu_size kernel parameterJoerg Roedel1-15/+0
This parameter is not longer necessary when aperture increases dynamically. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: implement suspend/resumeJoerg Roedel1-1/+20
This patch puts everything together and enables suspend/resume support in the AMD IOMMU driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd_iommu: un __init functions required for suspend/resumeJoerg Roedel1-5/+5
This patch makes sure that no function required for suspend/resume of AMD IOMMU driver is thrown away after boot. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add function to disable all iommusJoerg Roedel1-0/+13
This function is required for suspend/resume support with AMD IOMMU enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: remove support for msi-xJoerg Roedel1-43/+1
Current hardware uses msi instead of msi-x so this code it not necessary and can not be tested. The best thing is to drop this code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: drop pointless iommu-loop in msi setup codeJoerg Roedel1-7/+1
It is not necessary to loop again over all IOMMUs in this code. So drop the loop. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: consolidate hardware initialization to one functionJoerg Roedel1-18/+32
This patch restructures the AMD IOMMU initialization code to initialize all hardware registers with one single function call. This is helpful for suspend/resume support. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: introduce for_each_iommu* macrosJoerg Roedel1-4/+4
This patch introduces the for_each_iommu and for_each_iommu_safe macros to simplify the developers life when having to iterate over all AMD IOMMUs in the system. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: make sure only ivmd entries are parsedJoerg Roedel1-0/+2
The bug never triggered. But it should be fixed to protect against broken ACPI tables in the future. [ Impact: protect against broken ivrs acpi table ] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: fix the handling of device aliases in the AMD IOMMU driver.Neil Turton1-1/+1
The devid parameter to set_dev_entry_from_acpi is the requester ID rather than the device ID since it is used to index the IOMMU device table. The handling of IVHD_DEV_ALIAS used to pass the device ID. This patch fixes it to pass the requester ID. [ Impact: fix setting the wrong req-id in acpi-table parsing ] Signed-off-by: Neil Turton <nturton@solarflare.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: fix an off-by-one error in the AMD IOMMU driver.Neil Turton1-1/+1
The variable amd_iommu_last_bdf holds the maximum bdf of any device controlled by an IOMMU, so the number of device entries needed is amd_iommu_last_bdf+1. The function tbl_size used amd_iommu_last_bdf instead. This would be a problem if the last device were a large enough power of 2. [ Impact: fix amd_iommu_last_bdf off-by-one error ] Signed-off-by: Neil Turton <nturton@solarflare.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: disable device isolation with CONFIG_IOMMU_STRESSJoerg Roedel1-0/+6
With device isolation disabled we can test better for race conditions in dma_ops related code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: print ivmd information to dmesg when requestedJoerg Roedel1-0/+11
Add information about device memory mapping requirements for the IOMMU as described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: print ivhd information to dmesg when requestedJoerg Roedel1-0/+73
Add information about devices belonging to an IOMMU as described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add dump for iommus described in ivrs tableJoerg Roedel1-0/+9
Add information about IOMMU devices described in the IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the kernel command line. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-28amd-iommu: add amd_iommu_dump parameterJoerg Roedel1-0/+10
This kernel parameter will be useful to get some AMD IOMMU related information in dmesg that is not necessary for the default user but may be helpful in debug situations. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-05-04amd-iommu: fix iommu flag masksJoerg Roedel1-8/+8
The feature bits should be set via bitmasks, not via feature IDs. [ Impact: fix feature enabling in newer IOMMU versions ] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> LKML-Reference: <20090504102028.GA30307@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-03Merge branch 'for-linus' of ↵Linus Torvalds1-9/+6
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu: (89 commits) AMD IOMMU: remove now unnecessary #ifdefs AMD IOMMU: prealloc_protection_domains should be static kvm/iommu: fix compile warning AMD IOMMU: add statistics about total number of map requests AMD IOMMU: add statistics about allocated io memory AMD IOMMU: add stats counter for domain tlb flushes AMD IOMMU: add stats counter for single iommu domain tlb flushes AMD IOMMU: add stats counter for cross-page request AMD IOMMU: add stats counter for free_coherent requests AMD IOMMU: add stats counter for alloc_coherent requests AMD IOMMU: add stats counter for unmap_sg requests AMD IOMMU: add stats counter for map_sg requests AMD IOMMU: add stats counter for unmap_single requests AMD IOMMU: add stats counter for map_single requests AMD IOMMU: add stats counter for completion wait events AMD IOMMU: add init code for statistic collection AMD IOMMU: add necessary header defines for stats counting AMD IOMMU: add Kconfig entry for statistic collection code AMD IOMMU: use dev_name in iommu_enable function AMD IOMMU: use calc_devid in prealloc_protection_domains ...
2009-01-03AMD IOMMU: use dev_name in iommu_enable functionJoerg Roedel1-6/+2
Impact: cleanup Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2009-01-03AMD IOMMU: convert amd_iommu_isolate to boolJoerg Roedel1-3/+4
Impact: cleanup Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-12-29x86: amd_iommu_init.c: iommu_enable and iommu_enable_event_logging should be ↵Jaswinder Singh Rajput1-2/+2
static Impact: cleanup, reduce kernel size a bit, avoid sparse warning Fixes sparse warning: arch/x86/kernel/amd_iommu_init.c:246:13: warning: symbol 'iommu_enable' was not declared. Should it be static? arch/x86/kernel/amd_iommu_init.c:259:13: warning: symbol 'iommu_enable_event_logging' was not declared. Should it be static? Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-23Merge branch 'x86/iommu' into x86/coreIngo Molnar1-0/+1
2008-12-17AMD IOMMU: set cmd buffer pointers to zero manuallyJoerg Roedel1-0/+4
Impact: set cmd buffer head and tail pointers to zero in case nobody else did Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-12-16AMD IOMMU: allocate rlookup_table with __GFP_ZEROJoerg Roedel1-1/+2
Impact: fix bug which can lead to panic in prealloc_protection_domains() Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-12-01Merge branch 'x86/urgent' into x86/iommuIngo Molnar1-2/+4
2008-11-28x86: move GART specific stuff from iommu.h to gart.hJoerg Roedel1-0/+1
Impact: cleanup Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-18AMD IOMMU: fix fullflush comparison lengthJoerg Roedel1-1/+1
Impact: fix comparison length for 'fullflush' Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-18AMD IOMMU: enable device isolation per defaultJoerg Roedel1-1/+1
Impact: makes device isolation the default for AMD IOMMU Some device drivers showed double-free bugs of DMA memory while testing them with AMD IOMMU. If all devices share the same protection domain this can lead to data corruption and data loss. Prevent this by putting each device into its own protection domain per default. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-18AMD IOMMU: add parameter to disable device isolationJoerg Roedel1-0/+2
Impact: add a new AMD IOMMU kernel command line parameter Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-10-18amd_iommu: fix nasty bug that caused ILLEGAL_DEVICE_TABLE_ENTRY errorsAndreas Herrmann1-1/+1
We are on 64-bit so better use u64 instead of u32 to deal with addresses: static void __init iommu_set_device_table(struct amd_iommu *iommu) { u64 entry; ... entry = virt_to_phys(amd_iommu_dev_table); ... (I am wondering why gcc 4.2.x did not warn about the assignment between u32 and unsigned long.) Cc: iommu@lists.linux-foundation.org Cc: stable@kernel.org Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-12x86, amd-iommu: propagate PCI device enabling errorIngo Molnar1-3/+1
propagate an error in enabling the PCI device. Also eliminates this warning: arch/x86/kernel/amd_iommu_init.c: In function ‘init_iommu_one’: arch/x86/kernel/amd_iommu_init.c:726: warning: ignoring return value of ‘pci_enable_device’, declared with attribute warn_unused_result Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-22iommu: remove fullflush and nofullflush in IOMMU generic optionFUJITA Tomonori1-1/+4
This patch against tip/x86/iommu virtually reverts 2842e5bf3115193f05dc9dac20f940e7abf44c1a. 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/2008/9/19/106 Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: use cmd_buf_size when freeing the command bufferJoerg Roedel1-1/+2
The command buffer release function uses the CMD_BUF_SIZE macro for get_order. Replace this with iommu->cmd_buf_size which is more reliable about the actual size of the buffer. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: calculate IVHD size with a functionJoerg Roedel1-2/+10
The current calculation of the IVHD entry size is hard to read. So move this code to a seperate function to make it more clear what this calculation does. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: remove unnecessary cast to u64 in the init codeJoerg Roedel1-1/+1
The ctrl variable is only u32 and readl also returns a 32 bit value. So the cast to u64 is pointless. Remove it with this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: free domain bitmap with its allocation orderJoerg Roedel1-1/+2
The amd_iommu_pd_alloc_bitmap is allocated with a calculated order and freed with order 1. This is not a bug since the calculated order always evaluates to 1, but its unclean code. So replace the 1 with the calculation in the release path. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: allow IO page faults from devicesJoerg Roedel1-1/+0
There is a bit in the device entry to suppress all IO page faults generated by a device. This bit was set until now because there was no event logging. Now that there is event logging this patch allows IO page faults from devices to see them in the kernel log. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: enable event loggingJoerg Roedel1-0/+8
The code to log IOMMU events is in place now. So enable event logging with this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: add event handling codeJoerg Roedel1-1/+0
This patch adds code for polling and printing out events generated by the AMD IOMMU. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: add MSI interrupt supportJoerg Roedel1-1/+98
The AMD IOMMU can generate interrupts for various reasons. This patch adds the basic interrupt enabling infrastructure to the driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: save pci_dev instead of devidJoerg Roedel1-9/+16
We need the pci_dev later anyways to enable MSI for the IOMMU hardware. So remove the devid pointing to the BDF and replace it with the pci_dev structure where the IOMMU is implemented. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: save pci segment from ACPI tablesJoerg Roedel1-0/+1
This patch adds the pci_seg field to the amd_iommu structure and fills it with the corresponding value from the ACPI table. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19AMD IOMMU: add event buffer allocationJoerg Roedel1-0/+29
This patch adds the allocation of a event buffer for each AMD IOMMU in the system. The hardware will log events like device page faults or other errors to this buffer once this is enabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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