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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', ↵Ingo Molnar1-86/+271
'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-linus
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>
2008-06-27x86, AMD IOMMU: add functions to parse IOMMU memory mapping requirements for ↵Joerg Roedel1-0/+87
devices This patch adds the functions to parse the information about IOMMU exclusion ranges and required unity mappings for the devices handled by the 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 detect code for AMD IOMMU hardwareJoerg Roedel1-0/+78
This patch adds the detection of AMD IOMMU hardware provided on information from ACPI provided by the BIOS. 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 functions for IOMMU hardware initialization from ACPIJoerg Roedel1-0/+125
This patch adds functions to initialize the IOMMU hardware with information from ACPI and PCI. 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 device table initialization functionsJoerg Roedel1-0/+45
This patch adds functions necessary to initialize the device table from the ACPI definitions. 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 command buffer (de-)allocationJoerg Roedel1-0/+30
This patch adds the functions to allocate and deallocate the command buffer for one IOMMU in the system. 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 functions for programming IOMMU MMIO spaceJoerg Roedel1-0/+60
This patch adds the functions required to programm the IOMMU with the MMIO space. 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 functions for mapping/unmapping the MMIO spaceJoerg Roedel1-0/+23
This patch contains two functions to map and unmap the MMIO region of an 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 functions to find last possible PCI device for IOMMUJoerg Roedel1-0/+79
This patch adds functions to find the last PCI bus/device/function the IOMMU driver has to handle. This information is used later to allocate the memory for the data structures. 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 data structures to manage the IOMMUs in the systemJoerg Roedel1-0/+17
This patch adds the data structures which will contain the information read from the ACPI table. 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 defines and structures for ACPI scanning codeJoerg Roedel1-0/+101
This patch adds the required data structures and constants required to parse the ACPI table for 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>
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