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| author | Becky Bruce <beckyb@kernel.crashing.org> | 2009-05-15 02:42:29 +0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-06-16 06:45:29 +0400 |
| commit | 5cef379b34ffcd96567066ddc1012bd40e6e7675 (patch) | |
| tree | e31aca9b3a22df85e3982b07db60e004f4510963 /arch/powerpc/platforms/86xx/mpc86xx_hpcn.c | |
| parent | 42e27bfc4bfa42bd905e53be93d862b8e3d80a00 (diff) | |
| download | linux-5cef379b34ffcd96567066ddc1012bd40e6e7675.tar.xz | |
powerpc: Add 86xx support for SWIOTLB
This is the final bit of code to allow enabling swiotlb on
mpc86xx. The platform-specific code is very small and consists
of enabling SWIOTLB in the config file, registering the
swiotlb_setup_bus_notifier initcall, and setting pci_dma_ops
to point to swiotlb_pci_dma_ops if we have more memory than
can be mapped by the inbound PCI windows.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/86xx/mpc86xx_hpcn.c')
| -rw-r--r-- | arch/powerpc/platforms/86xx/mpc86xx_hpcn.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c index 7e9e83c04a8a..66327024a6a6 100644 --- a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c +++ b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c @@ -19,6 +19,7 @@ #include <linux/delay.h> #include <linux/seq_file.h> #include <linux/of_platform.h> +#include <linux/lmb.h> #include <asm/system.h> #include <asm/time.h> @@ -27,6 +28,7 @@ #include <asm/prom.h> #include <mm/mmu_decl.h> #include <asm/udbg.h> +#include <asm/swiotlb.h> #include <asm/mpic.h> @@ -70,7 +72,9 @@ mpc86xx_hpcn_setup_arch(void) { #ifdef CONFIG_PCI struct device_node *np; + struct pci_controller *hose; #endif + dma_addr_t max = 0xffffffff; if (ppc_md.progress) ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0); @@ -83,6 +87,9 @@ mpc86xx_hpcn_setup_arch(void) fsl_add_bridge(np, 1); else fsl_add_bridge(np, 0); + hose = pci_find_hose_for_OF_device(np); + max = min(max, hose->dma_window_base_cur + + hose->dma_window_size); } ppc_md.pci_exclude_device = mpc86xx_exclude_device; @@ -94,6 +101,13 @@ mpc86xx_hpcn_setup_arch(void) #ifdef CONFIG_SMP mpc86xx_smp_init(); #endif + +#ifdef CONFIG_SWIOTLB + if (lmb_end_of_DRAM() > max) { + ppc_swiotlb_enable = 1; + set_pci_dma_ops(&swiotlb_pci_dma_ops); + } +#endif } @@ -158,6 +172,7 @@ static int __init declare_of_platform_devices(void) return 0; } machine_device_initcall(mpc86xx_hpcn, declare_of_platform_devices); +machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier); define_machine(mpc86xx_hpcn) { .name = "MPC86xx HPCN", |