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author | Becky Bruce <beckyb@kernel.crashing.org> | 2009-09-21 08:26:35 (GMT) |
---|---|---|
committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-09-24 05:31:43 (GMT) |
commit | 738ef42e32fe95553a424c04016b936c9f6c9afb (patch) | |
tree | f45f21a92eacbb22bd3223c5ac725473c6ec1d72 /arch/powerpc | |
parent | 1cebd7a0f62804ca24f7b7b35e8105000b9e879a (diff) | |
download | linux-738ef42e32fe95553a424c04016b936c9f6c9afb.tar.xz |
powerpc: Change archdata dma_data to a union
Sometimes this is used to hold a simple offset, and sometimes
it is used to hold a pointer. This patch changes it to a union containing
void * and dma_addr_t. get/set accessors are also provided, because it was
getting a bit ugly to get to the actual data.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/include/asm/device.h | 11 | ||||
-rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 10 | ||||
-rw-r--r-- | arch/powerpc/include/asm/iommu.h | 10 | ||||
-rw-r--r-- | arch/powerpc/kernel/dma-iommu.c | 16 | ||||
-rw-r--r-- | arch/powerpc/kernel/pci-common.c | 2 | ||||
-rw-r--r-- | arch/powerpc/kernel/vio.c | 2 | ||||
-rw-r--r-- | arch/powerpc/platforms/cell/beat_iommu.c | 2 | ||||
-rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 9 | ||||
-rw-r--r-- | arch/powerpc/platforms/iseries/iommu.c | 2 | ||||
-rw-r--r-- | arch/powerpc/platforms/pasemi/iommu.c | 2 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/iommu.c | 8 | ||||
-rw-r--r-- | arch/powerpc/sysdev/dart_iommu.c | 2 |
12 files changed, 49 insertions, 27 deletions
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h index 9dade15..6d94d27 100644 --- a/arch/powerpc/include/asm/device.h +++ b/arch/powerpc/include/asm/device.h @@ -15,7 +15,16 @@ struct dev_archdata { /* DMA operations on that device */ struct dma_map_ops *dma_ops; - void *dma_data; + + /* + * When an iommu is in use, dma_data is used as a ptr to the base of the + * iommu_table. Otherwise, it is a simple numerical offset. + */ + union { + dma_addr_t dma_offset; + void *iommu_table_base; + } dma_data; + #ifdef CONFIG_SWIOTLB dma_addr_t max_direct_dma_addr; #endif diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index 34b919f..e281dae 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -97,14 +97,20 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops) * swiotlb use this function, but it is typically not used by implementations * with an iommu. */ -static inline unsigned long get_dma_offset(struct device *dev) +static inline dma_addr_t get_dma_offset(struct device *dev) { if (dev) - return (unsigned long)dev->archdata.dma_data; + return dev->archdata.dma_data.dma_offset; return PCI_DRAM_OFFSET; } +static inline void set_dma_offset(struct device *dev, dma_addr_t off) +{ + if (dev) + dev->archdata.dma_data.dma_offset = off; +} + /* this will be removed soon */ #define flush_write_buffers() diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index 7464c0d..edfc980 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -70,6 +70,16 @@ struct iommu_table { struct scatterlist; +static inline void set_iommu_table_base(struct device *dev, void *base) +{ + dev->archdata.dma_data.iommu_table_base = base; +} + +static inline void *get_iommu_table_base(struct device *dev) +{ + return dev->archdata.dma_data.iommu_table_base; +} + /* Frees table for an individual device node */ extern void iommu_free_table(struct iommu_table *tbl, const char *node_name); diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index 87ddb3f..37771a5 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -18,7 +18,7 @@ static void *dma_iommu_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { - return iommu_alloc_coherent(dev, dev->archdata.dma_data, size, + return iommu_alloc_coherent(dev, get_iommu_table_base(dev), size, dma_handle, device_to_mask(dev), flag, dev_to_node(dev)); } @@ -26,7 +26,7 @@ static void *dma_iommu_alloc_coherent(struct device *dev, size_t size, static void dma_iommu_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle) { - iommu_free_coherent(dev->archdata.dma_data, size, vaddr, dma_handle); + iommu_free_coherent(get_iommu_table_base(dev), size, vaddr, dma_handle); } /* Creates TCEs for a user provided buffer. The user buffer must be @@ -39,8 +39,8 @@ static dma_addr_t dma_iommu_map_page(struct device *dev, struct page *page, enum dma_data_direction direction, struct dma_attrs *attrs) { - return iommu_map_page(dev, dev->archdata.dma_data, page, offset, size, - device_to_mask(dev), direction, attrs); + return iommu_map_page(dev, get_iommu_table_base(dev), page, offset, + size, device_to_mask(dev), direction, attrs); } @@ -48,7 +48,7 @@ static void dma_iommu_unmap_page(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction, struct dma_attrs *attrs) { - iommu_unmap_page(dev->archdata.dma_data, dma_handle, size, direction, + iommu_unmap_page(get_iommu_table_base(dev), dma_handle, size, direction, attrs); } @@ -57,7 +57,7 @@ static int dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction direction, struct dma_attrs *attrs) { - return iommu_map_sg(dev, dev->archdata.dma_data, sglist, nelems, + return iommu_map_sg(dev, get_iommu_table_base(dev), sglist, nelems, device_to_mask(dev), direction, attrs); } @@ -65,14 +65,14 @@ static void dma_iommu_unmap_sg(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction direction, struct dma_attrs *attrs) { - iommu_unmap_sg(dev->archdata.dma_data, sglist, nelems, direction, + iommu_unmap_sg(get_iommu_table_base(dev), sglist, nelems, direction, attrs); } /* We support DMA to/from any memory page via the iommu */ static int dma_iommu_dma_supported(struct device *dev, u64 mask) { - struct iommu_table *tbl = dev->archdata.dma_data; + struct iommu_table *tbl = get_iommu_table_base(dev); if (!tbl || tbl->it_offset > mask) { printk(KERN_INFO diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index e9f4840..bb8209e 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1117,7 +1117,7 @@ void __devinit pcibios_setup_bus_devices(struct pci_bus *bus) /* Hook up default DMA ops */ sd->dma_ops = pci_dma_ops; - sd->dma_data = (void *)PCI_DRAM_OFFSET; + set_dma_offset(&dev->dev, PCI_DRAM_OFFSET); /* Additional platform DMA/iommu setup */ if (ppc_md.pci_dma_dev_setup) diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c index 1b4f674..77f6421 100644 --- a/arch/powerpc/kernel/vio.c +++ b/arch/powerpc/kernel/vio.c @@ -1235,7 +1235,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node) vio_cmo_set_dma_ops(viodev); else viodev->dev.archdata.dma_ops = &dma_iommu_ops; - viodev->dev.archdata.dma_data = vio_build_iommu_table(viodev); + set_iommu_table_base(&viodev->dev, vio_build_iommu_table(viodev)); set_dev_node(&viodev->dev, of_node_to_nid(of_node)); /* init generic 'struct device' fields: */ diff --git a/arch/powerpc/platforms/cell/beat_iommu.c b/arch/powerpc/platforms/cell/beat_iommu.c index 93b0efd..39d361c 100644 --- a/arch/powerpc/platforms/cell/beat_iommu.c +++ b/arch/powerpc/platforms/cell/beat_iommu.c @@ -77,7 +77,7 @@ static void __init celleb_init_direct_mapping(void) static void celleb_dma_dev_setup(struct device *dev) { dev->archdata.dma_ops = get_pci_dma_ops(); - dev->archdata.dma_data = (void *)celleb_dma_direct_offset; + set_dma_offset(dev, celleb_dma_direct_offset); } static void celleb_pci_dma_dev_setup(struct pci_dev *pdev) diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 416db17..ca5bfdf 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -657,15 +657,13 @@ static void cell_dma_dev_setup_fixed(struct device *dev); static void cell_dma_dev_setup(struct device *dev) { - struct dev_archdata *archdata = &dev->archdata; - /* Order is important here, these are not mutually exclusive */ if (get_dma_ops(dev) == &dma_iommu_fixed_ops) cell_dma_dev_setup_fixed(dev); else if (get_pci_dma_ops() == &dma_iommu_ops) - archdata->dma_data = cell_get_iommu_table(dev); + set_iommu_table_base(dev, cell_get_iommu_table(dev)); else if (get_pci_dma_ops() == &dma_direct_ops) - archdata->dma_data = (void *)cell_dma_direct_offset; + set_dma_offset(dev, cell_dma_direct_offset); else BUG(); } @@ -973,11 +971,10 @@ static int dma_set_mask_and_switch(struct device *dev, u64 dma_mask) static void cell_dma_dev_setup_fixed(struct device *dev) { - struct dev_archdata *archdata = &dev->archdata; u64 addr; addr = cell_iommu_get_fixed_address(dev) + dma_iommu_fixed_base; - archdata->dma_data = (void *)addr; + set_dma_offset(dev, addr); dev_dbg(dev, "iommu: fixed addr = %llx\n", addr); } diff --git a/arch/powerpc/platforms/iseries/iommu.c b/arch/powerpc/platforms/iseries/iommu.c index 6c1e101..9d53cb4 100644 --- a/arch/powerpc/platforms/iseries/iommu.c +++ b/arch/powerpc/platforms/iseries/iommu.c @@ -193,7 +193,7 @@ static void pci_dma_dev_setup_iseries(struct pci_dev *pdev) pdn->iommu_table = iommu_init_table(tbl, -1); else kfree(tbl); - pdev->dev.archdata.dma_data = pdn->iommu_table; + set_iommu_table_base(&pdev->dev, pdn->iommu_table); } #else #define pci_dma_dev_setup_iseries NULL diff --git a/arch/powerpc/platforms/pasemi/iommu.c b/arch/powerpc/platforms/pasemi/iommu.c index a0ff03a..7b1d608 100644 --- a/arch/powerpc/platforms/pasemi/iommu.c +++ b/arch/powerpc/platforms/pasemi/iommu.c @@ -189,7 +189,7 @@ static void pci_dma_dev_setup_pasemi(struct pci_dev *dev) } #endif - dev->dev.archdata.dma_data = &iommu_table_iobmap; + set_iommu_table_base(&dev->dev, &iommu_table_iobmap); } static void pci_dma_bus_setup_null(struct pci_bus *b) { } diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 661c8e0..1a0000a 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -482,7 +482,7 @@ static void pci_dma_dev_setup_pSeries(struct pci_dev *dev) phb->node); iommu_table_setparms(phb, dn, tbl); PCI_DN(dn)->iommu_table = iommu_init_table(tbl, phb->node); - dev->dev.archdata.dma_data = PCI_DN(dn)->iommu_table; + set_iommu_table_base(&dev->dev, PCI_DN(dn)->iommu_table); return; } @@ -494,7 +494,7 @@ static void pci_dma_dev_setup_pSeries(struct pci_dev *dev) dn = dn->parent; if (dn && PCI_DN(dn)) - dev->dev.archdata.dma_data = PCI_DN(dn)->iommu_table; + set_iommu_table_base(&dev->dev, PCI_DN(dn)->iommu_table); else printk(KERN_WARNING "iommu: Device %s has no iommu table\n", pci_name(dev)); @@ -538,7 +538,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) */ if (dma_window == NULL || pdn->parent == NULL) { pr_debug(" no dma window for device, linking to parent\n"); - dev->dev.archdata.dma_data = PCI_DN(pdn)->iommu_table; + set_iommu_table_base(&dev->dev, PCI_DN(pdn)->iommu_table); return; } @@ -554,7 +554,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) pr_debug(" found DMA window, table: %p\n", pci->iommu_table); } - dev->dev.archdata.dma_data = pci->iommu_table; + set_iommu_table_base(&dev->dev, pci->iommu_table); } #else /* CONFIG_PCI */ #define pci_dma_bus_setup_pSeries NULL diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index 89639ec..ae3c4db 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -297,7 +297,7 @@ static void pci_dma_dev_setup_dart(struct pci_dev *dev) /* We only have one iommu table on the mac for now, which makes * things simple. Setup all PCI devices to point to this table */ - dev->dev.archdata.dma_data = &iommu_table_dart; + set_iommu_table_base(&dev->dev, &iommu_table_dart); } static void pci_dma_bus_setup_dart(struct pci_bus *bus) |