From 12d04eef927bf61328af2c7cbe756c96f98ac3bf Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sat, 11 Nov 2006 17:25:02 +1100 Subject: [POWERPC] Refactor 64 bits DMA operations This patch completely refactors DMA operations for 64 bits powerpc. 32 bits is untouched for now. We use the new dev_archdata structure to add the dma operations pointer and associated data to struct device. While at it, we also add the OF node pointer and numa node. In the future, we might want to look into merging that with pci_dn as well. The old vio, pci-iommu and pci-direct DMA ops are gone. They are now replaced by a set of generic iommu and direct DMA ops (non PCI specific) that can be used by bus types. The toplevel implementation is now inline. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/sysdev/dart_iommu.c | 31 +++++++++---------------------- 1 file changed, 9 insertions(+), 22 deletions(-) (limited to 'arch/powerpc/sysdev/dart_iommu.c') diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index 572b7846cc77..ac784bb57289 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -289,24 +289,15 @@ static void iommu_table_dart_setup(void) set_bit(iommu_table_dart.it_size - 1, iommu_table_dart.it_map); } -static void iommu_dev_setup_dart(struct pci_dev *dev) +static void pci_dma_dev_setup_dart(struct pci_dev *dev) { - struct device_node *dn; - /* We only have one iommu table on the mac for now, which makes * things simple. Setup all PCI devices to point to this table - * - * We must use pci_device_to_OF_node() to make sure that - * we get the real "final" pointer to the device in the - * pci_dev sysdata and not the temporary PHB one */ - dn = pci_device_to_OF_node(dev); - - if (dn) - PCI_DN(dn)->iommu_table = &iommu_table_dart; + dev->dev.archdata.dma_data = &iommu_table_dart; } -static void iommu_bus_setup_dart(struct pci_bus *bus) +static void pci_dma_bus_setup_dart(struct pci_bus *bus) { struct device_node *dn; @@ -321,9 +312,6 @@ static void iommu_bus_setup_dart(struct pci_bus *bus) PCI_DN(dn)->iommu_table = &iommu_table_dart; } -static void iommu_dev_setup_null(struct pci_dev *dev) { } -static void iommu_bus_setup_null(struct pci_bus *bus) { } - void iommu_init_early_dart(void) { struct device_node *dn; @@ -344,22 +332,21 @@ void iommu_init_early_dart(void) /* Initialize the DART HW */ if (dart_init(dn) == 0) { - ppc_md.iommu_dev_setup = iommu_dev_setup_dart; - ppc_md.iommu_bus_setup = iommu_bus_setup_dart; + ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_dart; + ppc_md.pci_dma_bus_setup = pci_dma_bus_setup_dart; /* Setup pci_dma ops */ - pci_iommu_init(); - + pci_dma_ops = &dma_iommu_ops; return; } bail: /* If init failed, use direct iommu and null setup functions */ - ppc_md.iommu_dev_setup = iommu_dev_setup_null; - ppc_md.iommu_bus_setup = iommu_bus_setup_null; + ppc_md.pci_dma_dev_setup = NULL; + ppc_md.pci_dma_bus_setup = NULL; /* Setup pci_dma ops */ - pci_direct_iommu_init(); + pci_dma_ops = &dma_direct_ops; } -- cgit v1.2.3 From 165785e5c0be3ad43e8b8eadfbd25e92c2cd002a Mon Sep 17 00:00:00 2001 From: Jeremy Kerr Date: Sat, 11 Nov 2006 17:25:18 +1100 Subject: [POWERPC] Cell iommu support This patch adds full cell iommu support (and iommu disabled mode). It implements mapping/unmapping of iommu pages on demand using the standard powerpc iommu framework. It also supports running with iommu disabled for machines with less than 2GB of memory. (The default is off in that case, though it can be forced on with the kernel command line option iommu=force). Signed-off-by: Jeremy Kerr Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/sysdev/dart_iommu.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/powerpc/sysdev/dart_iommu.c') diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index ac784bb57289..1488535b0e13 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -48,9 +48,6 @@ #include "dart.h" -extern int iommu_is_off; -extern int iommu_force_on; - /* Physical base address and size of the DART table */ unsigned long dart_tablebase; /* exported to htab_initialize */ static unsigned long dart_tablesize; -- cgit v1.2.3