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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>
2008-09-19AMD IOMMU: implement lazy IO/TLB flushingJoerg Roedel1-1/+6
The IO/TLB flushing on every unmaping operation is the most expensive part in AMD IOMMU code and not strictly necessary. It is sufficient to do the flush before any entries are reused. This is patch implements lazy IO/TLB flushing which does exactly this. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-08-15x86, AMD IOMMU: initialize dma_ops after sysfs registrationJoerg Roedel1-3/+3
If sysfs registration fails all memory used by IOMMU is freed. This happens after dma_ops initialization and the functions will access the freed memory then. Fix this by initializing dma_ops after the sysfs registration. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-08-15x86, AMD IOMMU: initialize device table properlyJoerg Roedel1-0/+18
This patch adds device table initializations which forbids memory accesses for devices per default and disables all page faults. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-26x86, AMD IOMMU: include amd_iommu_last_bdf in device initializationJoerg Roedel1-2/+2
All the values read while searching for amd_iommu_last_bdf are defined as inclusive. Let the code handle this value as such. Found by Wei Wang. Thanks Wei. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Cc: Wei Wang <wei.wang2@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-21Merge branches 'x86/urgent', 'x86/amd-iommu', 'x86/apic', 'x86/cleanups', 'x86/core', 'x86/cpu', 'x86/fixmap', 'x86/gart', 'x86/kprobes', 'x86/memtest', 'x86/modules', 'x86/nmi', 'x86/pat', 'x86/reboot', 'x86/setup', 'x86/step', 'x86/unify-pci', 'x86/uv', 'x86/xen' and 'xen-64bit' into x86/for-linusIngo Molnar1-86/+271
2008-07-18AMD IOMMU: set iommu for device from ACPI code tooJoerg Roedel1-11/+16
The device<->iommu relationship has to be set from the information in the ACPI table too. This patch adds this logic to the driver. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: replace DEVID macro with a functionJoerg Roedel1-4/+5
This patch replaces the DEVID macro with a function and uses them where apropriate (also in the core code). Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: replace self made size parsing with memparse callJoerg Roedel1-14/+4
This patch replaces the self-made parsing of the amd_iommu_size option with the generic memparse function call. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: replace memset with __GFP_ZERO for table allocationJoerg Roedel1-9/+5
This patch removes the memset from the data structure initialization code and allocate the structures with the __GFP_ZERO flag. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: do runtime list initialization at compile timeJoerg Roedel1-6/+2
This patch changes the list initialization for the iommu list and the unity map list from runtime to compile time. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: use true/false instead of 0/1 for bool valueJoerg Roedel1-4/+4
This patch replaces the integer values used for the bool variable in ACPI scanning code with true and false. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: remove unneeded initializations from command buffer allocationJoerg Roedel1-4/+2
This patch removes an unneeded initialization from the alloc_command_buffer function and replaces a memset with __GFP_ZERO. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: remove unnecessary free checks from init codeJoerg Roedel1-17/+10
This patch removes unnecessary checks before memory is released. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: replace TBL_SIZE macro with a functionJoerg Roedel1-4/+11
This patch converts the TBL_SIZE macro in the init code to a function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: replace UPDATE_LAST_BDF macro with a functionJoerg Roedel1-7/+8
This patch replaces the UPDATE_LAST_BDF macro in the init code with the update_last_devid function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86, AMD IOMMU: add comments to the initialization codeJoerg Roedel1-8/+206
This patch adds some comments to the AMD IOMMU initialization code to increase its readability. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11x86: make only GART code include gart.hFUJITA Tomonori1-1/+1
gart.h has only GART-specific stuff. Only GART code needs it. Other IOMMU stuff should include iommu.h instead of gart.h. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09x86, AMD IOMMU: ignore detection of GART IOMMUJoerg Roedel1-1/+1
One of the last IOMMU updates covered a bug in the AMD IOMMU code. The early detection code does not succeed if the GART is already detected. This patch fixes this. Cc: Robert Richter <robert.richter@amd.com> Cc: Bhavna Sarathy <Bhavna.Sarathy@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: Joerg Roedel <joerg.roedel@amd.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Bhavna Sarathy <Bhavna.Sarathy@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04x86, AMD IOMMU: remove unnecessary code from the iommu_enable functionJoerg Roedel1-3/+0
This code removes a leftover from the iommu_enable function. The ctrl variable is assigned but never used. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Cc: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04x86, AMD IOMMU: don't try to init IOMMU if early detect code did not detect oneJoerg Roedel1-0/+6
This patch adds a check if the early detect code has found AMD IOMMU hardware descriptions and does not try to initialize hardware if the check failed. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Cc: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04x86, AMD IOMMU: honor iommu=off instead of amd_iommu=offJoerg Roedel1-8/+1
This patch removes the amd_iommu=off kernel parameter and honors the generic iommu=off parameter for the same purpose. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: robert.richter@amd.com Cc: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-30x86, AMD IOMMU: disable suspend/resume with IOMMU enabled (for now)Joerg Roedel1-0/+35
This patch disables suspend/resume on machines with AMD IOMMU enabled. Real suspend/resume support for AMD IOMMU is currently being worked on. Until this is ready it will be disabled to avoid data corruption when the IOMMU is not properly re-enabled at resume. The patch is based on a similar patch for the GART driver written by Pavel Machek. The overall driver merged into tip/master is tested with parallel disk and network loads and showed no problems in a test running for 3 days. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27x86, AMD IOMMU, build fix #2Ingo Molnar1-0/+2
fix: arch/x86/kernel/amd_iommu.c: In function ‘amd_iommu_init_dma_ops': arch/x86/kernel/amd_iommu.c:940: error: lvalue required as left operand of assignment arch/x86/kernel/amd_iommu.c:941: error: lvalue required as left operand of assignment due to !CONFIG_GART_IOMMU. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27x86, AMD IOMMU: initialize dma_ops from IOMMU initialization and enable IOMMUsJoerg Roedel1-0/+16
This patch adds a call to the driver specific dma_ops initialization routine from the AMD IOMMU hardware initialization. Further it adds the necessary code to finally enable AMD IOMMU hardware. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: Sebastian.Biemueller@amd.com Cc: robert.richter@amd.com Cc: joro@8bytes.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27x86, AMD IOMMU: add amd_iommu.h to export functions to the generic x86 dma codeJoerg Roedel1-0/+1
This patch adds the amd_iommu.h file which will be included in the generic code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: Sebastian.Biemueller@amd.com Cc: robert.richter@amd.com Cc: joro@8bytes.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27x86, AMD IOMMU: add kernel command line parameters for AMD IOMMUJoerg Roedel1-0/+34
This patch adds two parameters to the kernel command line to control behavior of the AMD IOMMU. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: Sebastian.Biemueller@amd.com Cc: robert.richter@amd.com Cc: joro@8bytes.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27x86, AMD IOMMU: add early detection codeJoerg Roedel1-0/+20
This patch adds code to detect an AMD IOMMU early during boot before the early detection code of other IOMMUs run. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: Sebastian.Biemueller@amd.com Cc: robert.richter@amd.com Cc: joro@8bytes.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27x86, AMD IOMMU: clue initialization code togetherJoerg Roedel1-0/+126
This patch puts the AMD IOMMU ACPI table parsing and hardware initialization functions together to the main intialization routine. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: Sebastian.Biemueller@amd.com Cc: robert.richter@amd.com Cc: joro@8bytes.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
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