From 75bf2a677c0c6fc279efcffe6ab542908344e332 Mon Sep 17 00:00:00 2001 From: Jia Hongtao Date: Fri, 3 Aug 2012 18:14:10 +0800 Subject: [PATCH] powerpc/swiotlb: Enable at early stage and disable if not necessary Remove the dependency on PCI initialization for SWIOTLB initialization. So that PCI can be initialized at proper time. SWIOTLB is partly determined by PCI inbound/outbound map which is assigned in PCI initialization. But swiotlb_init() should be done at the stage of mem_init() which is much earlier than PCI initialization. So we reserve the memory for SWIOTLB first and free it if not necessary. All boards are converted to fit this change. Signed-off-by: Jia Hongtao Signed-off-by: Li Yang Acked-by: Tony Breeds Signed-off-by: Kumar Gala --- arch/powerpc/include/asm/swiotlb.h | 6 ++++++ arch/powerpc/kernel/dma-swiotlb.c | 20 ++++++++++++++++++++ arch/powerpc/mm/mem.c | 3 +-- arch/powerpc/platforms/44x/currituck.c | 10 ++-------- arch/powerpc/platforms/85xx/mpc85xx_ds.c | 1 + arch/powerpc/platforms/85xx/qemu_e500.c | 1 + arch/powerpc/sysdev/fsl_pci.c | 5 +---- 7 files changed, 32 insertions(+), 14 deletions(-) diff --git a/arch/powerpc/include/asm/swiotlb.h b/arch/powerpc/include/asm/swiotlb.h index 8979d4cd3d705..de99d6e294303 100644 --- a/arch/powerpc/include/asm/swiotlb.h +++ b/arch/powerpc/include/asm/swiotlb.h @@ -22,4 +22,10 @@ int __init swiotlb_setup_bus_notifier(void); extern void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev); +#ifdef CONFIG_SWIOTLB +void swiotlb_detect_4g(void); +#else +static inline void swiotlb_detect_4g(void) {} +#endif + #endif /* __ASM_SWIOTLB_H */ diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c index a720b54b971cd..bd1a2aba599f5 100644 --- a/arch/powerpc/kernel/dma-swiotlb.c +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -105,3 +105,23 @@ int __init swiotlb_setup_bus_notifier(void) &ppc_swiotlb_plat_bus_notifier); return 0; } + +void swiotlb_detect_4g(void) +{ + if ((memblock_end_of_DRAM() - 1) > 0xffffffff) + ppc_swiotlb_enable = 1; +} + +static int __init swiotlb_late_init(void) +{ + if (ppc_swiotlb_enable) { + swiotlb_print_info(); + set_pci_dma_ops(&swiotlb_dma_ops); + ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb; + } else { + swiotlb_free(); + } + + return 0; +} +subsys_initcall(swiotlb_late_init); diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 44cf2b20503da..0dba5066c22ac 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -300,8 +300,7 @@ void __init mem_init(void) unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize; #ifdef CONFIG_SWIOTLB - if (ppc_swiotlb_enable) - swiotlb_init(1); + swiotlb_init(0); #endif num_physpages = memblock_phys_mem_size() >> PAGE_SHIFT; diff --git a/arch/powerpc/platforms/44x/currituck.c b/arch/powerpc/platforms/44x/currituck.c index 9f6c33d63a42c..6bd89a0e0dead 100644 --- a/arch/powerpc/platforms/44x/currituck.c +++ b/arch/powerpc/platforms/44x/currituck.c @@ -21,7 +21,6 @@ */ #include -#include #include #include #include @@ -159,13 +158,8 @@ static void __init ppc47x_setup_arch(void) /* No need to check the DMA config as we /know/ our windows are all of * RAM. Lets hope that doesn't change */ -#ifdef CONFIG_SWIOTLB - if ((memblock_end_of_DRAM() - 1) > 0xffffffff) { - ppc_swiotlb_enable = 1; - set_pci_dma_ops(&swiotlb_dma_ops); - ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb; - } -#endif + swiotlb_detect_4g(); + ppc47x_smp_init(); } diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c index 6d3265fe7718c..56f8c8f674df1 100644 --- a/arch/powerpc/platforms/85xx/mpc85xx_ds.c +++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c @@ -159,6 +159,7 @@ static void __init mpc85xx_ds_setup_arch(void) if (ppc_md.progress) ppc_md.progress("mpc85xx_ds_setup_arch()", 0); + swiotlb_detect_4g(); mpc85xx_ds_pci_init(); mpc85xx_smp_init(); diff --git a/arch/powerpc/platforms/85xx/qemu_e500.c b/arch/powerpc/platforms/85xx/qemu_e500.c index 95a2e53af71b6..3c5490c8423fe 100644 --- a/arch/powerpc/platforms/85xx/qemu_e500.c +++ b/arch/powerpc/platforms/85xx/qemu_e500.c @@ -42,6 +42,7 @@ static void __init qemu_e500_setup_arch(void) ppc_md.progress("qemu_e500_setup_arch()", 0); fsl_pci_init(); + swiotlb_detect_4g(); mpc85xx_smp_init(); } diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c index 6938792ccfd9c..da7a3d7f54cc8 100644 --- a/arch/powerpc/sysdev/fsl_pci.c +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -872,11 +872,8 @@ void __devinit fsl_pci_init(void) * we need SWIOTLB to handle buffers located outside of * dma capable memory region */ - if (memblock_end_of_DRAM() - 1 > max) { + if (memblock_end_of_DRAM() - 1 > max) ppc_swiotlb_enable = 1; - set_pci_dma_ops(&swiotlb_dma_ops); - ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb; - } #endif } #endif -- 2.39.5