diff options
Diffstat (limited to 'arch/powerpc/kernel/dma-swiotlb.c')
| -rw-r--r-- | arch/powerpc/kernel/dma-swiotlb.c | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c index 7d5fc9751622..132d61c91629 100644 --- a/arch/powerpc/kernel/dma-swiotlb.c +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -10,101 +10,12 @@ * option) any later version. * */ - -#include <linux/dma-direct.h> #include <linux/memblock.h> -#include <linux/pfn.h> -#include <linux/of_platform.h> -#include <linux/platform_device.h> -#include <linux/pci.h> - #include <asm/machdep.h> #include <asm/swiotlb.h> -#include <asm/dma.h> unsigned int ppc_swiotlb_enable; -static u64 swiotlb_powerpc_get_required(struct device *dev) -{ - u64 end, mask, max_direct_dma_addr = dev->archdata.max_direct_dma_addr; - - end = memblock_end_of_DRAM(); - if (max_direct_dma_addr && end > max_direct_dma_addr) - end = max_direct_dma_addr; - end += get_dma_offset(dev); - - mask = 1ULL << (fls64(end) - 1); - mask += mask - 1; - - return mask; -} - -/* - * At the moment, all platforms that use this code only require - * swiotlb to be used if we're operating on HIGHMEM. Since - * we don't ever call anything other than map_sg, unmap_sg, - * map_page, and unmap_page on highmem, use normal dma_ops - * for everything else. - */ -const struct dma_map_ops powerpc_swiotlb_dma_ops = { - .alloc = __dma_nommu_alloc_coherent, - .free = __dma_nommu_free_coherent, - .mmap = dma_nommu_mmap_coherent, - .map_sg = dma_direct_map_sg, - .unmap_sg = dma_direct_unmap_sg, - .dma_supported = swiotlb_dma_supported, - .map_page = dma_direct_map_page, - .unmap_page = dma_direct_unmap_page, - .sync_single_for_cpu = dma_direct_sync_single_for_cpu, - .sync_single_for_device = dma_direct_sync_single_for_device, - .sync_sg_for_cpu = dma_direct_sync_sg_for_cpu, - .sync_sg_for_device = dma_direct_sync_sg_for_device, - .get_required_mask = swiotlb_powerpc_get_required, -}; - -void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev) -{ - struct pci_controller *hose; - struct dev_archdata *sd; - - hose = pci_bus_to_host(pdev->bus); - sd = &pdev->dev.archdata; - sd->max_direct_dma_addr = - hose->dma_window_base_cur + hose->dma_window_size; -} - -static int ppc_swiotlb_bus_notify(struct notifier_block *nb, - unsigned long action, void *data) -{ - struct device *dev = data; - struct dev_archdata *sd; - - /* We are only intereted in device addition */ - if (action != BUS_NOTIFY_ADD_DEVICE) - return 0; - - sd = &dev->archdata; - sd->max_direct_dma_addr = 0; - - /* May need to bounce if the device can't address all of DRAM */ - if ((dma_get_mask(dev) + 1) < memblock_end_of_DRAM()) - set_dma_ops(dev, &powerpc_swiotlb_dma_ops); - - return NOTIFY_DONE; -} - -static struct notifier_block ppc_swiotlb_plat_bus_notifier = { - .notifier_call = ppc_swiotlb_bus_notify, - .priority = 0, -}; - -int __init swiotlb_setup_bus_notifier(void) -{ - bus_register_notifier(&platform_bus_type, - &ppc_swiotlb_plat_bus_notifier); - return 0; -} - void __init swiotlb_detect_4g(void) { if ((memblock_end_of_DRAM() - 1) > 0xffffffff) |