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path: root/drivers/iommu/fsl_pamu_domain.c
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2015-10-22iommu/fsl: Convert to device_group call-backJoerg Roedel1-25/+16
Convert the fsl pamu driver to make use of the new device_group call-back. Cc: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-03-31iommu/fsl: Make use of domain_alloc and domain_freeJoerg Roedel1-28/+32
Implement domain_alloc and domain_free iommu-ops as a replacement for domain_init/domain_destroy. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-02-03iommu/fsl: Various cleanupsEmil Medve1-99/+74
Currently a PAMU driver patch is very likely to receive some checkpatch complaints about the code in the context of the patch. This patch is an attempt to fix most of that and make the driver more readable Also fixed a subset of the sparse and coccinelle reported issues. Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-25iommu/fsl: Convert to iommu_capable() API functionJoerg Roedel1-3/+2
Cc: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-05iommu/fsl: Fix warning resulting from adding PCI device twiceVarun Sethi1-2/+8
iommu_group_get_for_dev determines the iommu group for the PCI device and adds the device to the group. In the PAMU driver we were again adding the device to the same group without checking if the device already had an iommu group. This resulted in the following warning. sysfs: cannot create duplicate filename '/devices/ffe200000.pcie/pci0000:00/0000:00:00.0/iommu_group' ------------[ cut here ]------------ WARNING: at fs/sysfs/dir.c:31 Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.17.0-rc3-00002-g7505cea-dirty #126 task: c0000001fe0a0000 ti: c0000001fe044000 task.ti: c0000001fe044000 NIP: c00000000018879c LR: c000000000188798 CTR: c00000000001ea50 REGS: c0000001fe047040 TRAP: 0700 Not tainted (3.17.0-rc3-00002-g7505cea-dirty) MSR: 0000000080029000 <CE,EE,ME> CR: 24ad8e22 XER: 20000000 SOFTE: 1 GPR00: c000000000188798 c0000001fe0472c0 c0000000009a52e0 0000000000000065 GPR04: 0000000000000001 0000000000000000 3a30303a00000000 0000000027000000 GPR08: 2f696f6d00000000 c0000000008d3830 c0000000009b3938 c0000000009bb3d0 GPR12: 0000000028ad8e24 c00000000fff4000 c00000000000205c 0000000000000000 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000000 c0000000008a4c70 GPR24: c0000000007e9010 c0000001fe0140a8 ffffffffffffffef 0000000000000001 GPR28: c0000001fe22ebb8 c0000000007e9010 c00000000090bf10 c0000001fe220000 NIP [c00000000018879c] .sysfs_warn_dup+0x74/0xa4 LR [c000000000188798] .sysfs_warn_dup+0x70/0xa4 Call Trace: [c0000001fe0472c0] [c000000000188798] .sysfs_warn_dup+0x70/0xa4 (unreliable) [c0000001fe047350] [c000000000188d34] .sysfs_do_create_link_sd.clone.2+0x168/0x174 [c0000001fe047400] [c0000000004b3cf8] .iommu_group_add_device+0x78/0x244 [c0000001fe0474b0] [c0000000004b6964] .fsl_pamu_add_device+0x88/0x1a8 [c0000001fe047570] [c0000000004b3960] .iommu_bus_notifier+0xdc/0x15c [c0000001fe047600] [c000000000059848] .notifier_call_chain+0x8c/0xe8 [c0000001fe0476a0] [c000000000059d04] .__blocking_notifier_call_chain+0x58/0x84 [c0000001fe047750] [c00000000036619c] .device_add+0x464/0x5c8 [c0000001fe047820] [c000000000300ebc] .pci_device_add+0x14c/0x17c [c0000001fe0478c0] [c000000000300fbc] .pci_scan_single_device+0xd0/0xf4 [c0000001fe047970] [c00000000030104c] .pci_scan_slot+0x6c/0x18c [c0000001fe047a10] [c00000000030226c] .pci_scan_child_bus+0x40/0x114 [c0000001fe047ac0] [c000000000021974] .pcibios_scan_phb+0x240/0x2c8 [c0000001fe047b70] [c00000000085a970] .pcibios_init+0x64/0xc8 [c0000001fe047c00] [c000000000001884] .do_one_initcall+0xbc/0x224 [c0000001fe047d00] [c000000000852d50] .kernel_init_freeable+0x14c/0x21c [c0000001fe047db0] [c000000000002078] .kernel_init+0x1c/0xfa4 [c0000001fe047e30] [c000000000000884] .ret_from_kernel_thread+0x58/0xd4 Instruction dump: 7c7f1b79 4182001c 7fe4fb78 7f83e378 38a01000 4bffc905 60000000 7c641b78 e87e8008 7fa5eb78 48482ff5 60000000 <0fe00000> 7fe3fb78 4bf7bd39 60000000 Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-31Merge branches 'x86/vt-d', 'x86/amd', 'arm/omap', 'ppc/pamu', 'arm/smmu', ↵Joerg Roedel1-13/+10
'arm/exynos' and 'core' into next
2014-07-07iommu: Constify struct iommu_opsThierry Reding1-1/+1
This structure is read-only data and should never be modified. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu/fsl: Fix the error condition during iommu groupVarun Sethi1-2/+5
Earlier PTR_ERR was being returned even if group was set to null. Now, we explicitly set an ERR_PTR value in case the group pointer is NULL. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu/fsl: Fix the device domain attach condition.Varun Sethi1-7/+2
Store the domain information for the device, only if it's not already attached to a domain. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu/fsl: Fix PAMU window size check.Varun Sethi1-1/+1
is_power_of_2 requires an unsigned long parameter which would lead to truncation of 64 bit values on 32 bit architectures. __ffs also expects an unsigned long parameter thus won't work for 64 bit values on 32 bit architectures. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Tested-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/fsl: Add void declarations in zero-arg functions.Chi Pham1-1/+1
Added explicit void declarations to zero-argument function headers. The following coccinelle script was used: @addvoid@ identifier f; @@ f( + void ) { ... } Signed-off-by: Chi Pham <fempsci@gmail.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/fsl_pamu: Remove unnecessary null test before kfreeFabian Frederick1-2/+1
Fix checkpatch warning: WARNING: kfree(NULL) is safe this check is probably not required Cc: Joerg Roedel <joro@8bytes.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: iommu@lists.linux-foundation.org Cc: devicetree@vger.kernel.org Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/fsl: Use iommu_group_get_for_dev() for IOMMU groupsAlex Williamson1-65/+1
Drop custom code and use IOMMU provided grouping support for PCI. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Varun Sethi <varun.sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-01-07iommu/fsl_pamu: Use dev_is_pci() to check whether it is pci deviceYijing Wang1-3/+3
Use PCI standard marco dev_is_pci() instead of directly compare pci_bus_type to check whether it is pci device. Signed-off-by: Yijing Wang <wangyijing@huawei.com> Acked-by: Varun Sethi <varun.sethi@freescale.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-08-14iommu/fsl: Fix whitespace problems noticed by git-amJoerg Roedel1-2/+2
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-08-14iommu/fsl: Freescale PAMU driver and iommu implementation.Varun Sethi1-0/+1172
Following is a brief description of the PAMU hardware: PAMU determines what action to take and whether to authorize the action on the basis of the memory address, a Logical IO Device Number (LIODN), and PAACT table (logically) indexed by LIODN and address. Hardware devices which need to access memory must provide an LIODN in addition to the memory address. Peripheral Access Authorization and Control Tables (PAACTs) are the primary data structures used by PAMU. A PAACT is a table of peripheral access authorization and control entries (PAACE).Each PAACE defines the range of I/O bus address space that is accessible by the LIOD and the associated access capabilities. There are two types of PAACTs: primary PAACT (PPAACT) and secondary PAACT (SPAACT).A given physical I/O device may be able to act as one or more independent logical I/O devices (LIODs). Each such logical I/O device is assigned an identifier called logical I/O device number (LIODN). A LIODN is allocated a contiguous portion of the I/O bus address space called the DSA window for performing DSA operations. The DSA window may optionally be divided into multiple sub-windows, each of which may be used to map to a region in system storage space. The first sub-window is referred to as the primary sub-window and the remaining are called secondary sub-windows. This patch provides the PAMU driver (fsl_pamu.c) and the corresponding IOMMU API implementation (fsl_pamu_domain.c). The PAMU hardware driver (fsl_pamu.c) has been derived from the work done by Ashish Kalra and Timur Tabi. [For iommu group support] Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Timur Tabi <timur@tabi.org> Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
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