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Diffstat (limited to 'arch/powerpc/kernel/dma-swiotlb.c')
-rw-r--r--arch/powerpc/kernel/dma-swiotlb.c89
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)