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| author | Alexey Kardashevskiy | 2013-11-21 07:43:14 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt | 2013-12-05 06:08:17 +0100 |
| commit | d905c5df9aef38d63df268f6f5e7b13894f626d3 (patch) | |
| tree | 621cbfdcb57729e5ec60c6ffe19aa670818381b8 /arch/powerpc/include | |
| parent | powerpc/powernv: Move SG list structure to header file (diff) | |
| download | kernel-qcow2-linux-d905c5df9aef38d63df268f6f5e7b13894f626d3.tar.gz kernel-qcow2-linux-d905c5df9aef38d63df268f6f5e7b13894f626d3.tar.xz kernel-qcow2-linux-d905c5df9aef38d63df268f6f5e7b13894f626d3.zip | |
PPC: POWERNV: move iommu_add_device earlier
The current implementation of IOMMU on sPAPR does not use iommu_ops
and therefore does not call IOMMU API's bus_set_iommu() which
1) sets iommu_ops for a bus
2) registers a bus notifier
Instead, PCI devices are added to IOMMU groups from
subsys_initcall_sync(tce_iommu_init) which does basically the same
thing without using iommu_ops callbacks.
However Freescale PAMU driver (https://lkml.org/lkml/2013/7/1/158)
implements iommu_ops and when tce_iommu_init is called, every PCI device
is already added to some group so there is a conflict.
This patch does 2 things:
1. removes the loop in which PCI devices were added to groups and
adds explicit iommu_add_device() calls to add devices as soon as they get
the iommu_table pointer assigned to them.
2. moves a bus notifier to powernv code in order to avoid conflict with
the notifier from Freescale driver.
iommu_add_device() and iommu_del_device() are public now.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/iommu.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index c34656a8925e..774fa2776907 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -101,8 +101,34 @@ extern void iommu_free_table(struct iommu_table *tbl, const char *node_name); */ extern struct iommu_table *iommu_init_table(struct iommu_table * tbl, int nid); +#ifdef CONFIG_IOMMU_API extern void iommu_register_group(struct iommu_table *tbl, int pci_domain_number, unsigned long pe_num); +extern int iommu_add_device(struct device *dev); +extern void iommu_del_device(struct device *dev); +#else +static inline void iommu_register_group(struct iommu_table *tbl, + int pci_domain_number, + unsigned long pe_num) +{ +} + +static inline int iommu_add_device(struct device *dev) +{ + return 0; +} + +static inline void iommu_del_device(struct device *dev) +{ +} +#endif /* !CONFIG_IOMMU_API */ + +static inline void set_iommu_table_base_and_group(struct device *dev, + void *base) +{ + set_iommu_table_base(dev, base); + iommu_add_device(dev); +} extern int iommu_map_sg(struct device *dev, struct iommu_table *tbl, struct scatterlist *sglist, int nelems, |