mirror of
https://github.com/torvalds/linux.git
synced 2024-12-29 06:12:08 +00:00
62fdd7678a
The patch contains Intel IOMMU IA64 specific code. It defines new machvec dig_vtd, hooks for IOMMU, DMAR table detection, cache line flush function, etc. For a generic kernel with CONFIG_DMAR=y, if Intel IOMMU is detected, dig_vtd is used for machinve vector. Otherwise, kernel falls back to dig machine vector. Kernel parameter "machvec=dig" or "intel_iommu=off" can be used to force kernel to boot dig machine vector. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/* Glue code to lib/swiotlb.c */
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/cache.h>
|
|
#include <linux/module.h>
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#include <asm/swiotlb.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/iommu.h>
|
|
#include <asm/machvec.h>
|
|
|
|
int swiotlb __read_mostly;
|
|
EXPORT_SYMBOL(swiotlb);
|
|
|
|
struct dma_mapping_ops swiotlb_dma_ops = {
|
|
.mapping_error = swiotlb_dma_mapping_error,
|
|
.alloc_coherent = swiotlb_alloc_coherent,
|
|
.free_coherent = swiotlb_free_coherent,
|
|
.map_single = swiotlb_map_single,
|
|
.unmap_single = swiotlb_unmap_single,
|
|
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
|
|
.sync_single_for_device = swiotlb_sync_single_for_device,
|
|
.sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
|
|
.sync_single_range_for_device = swiotlb_sync_single_range_for_device,
|
|
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
|
|
.sync_sg_for_device = swiotlb_sync_sg_for_device,
|
|
.map_sg = swiotlb_map_sg,
|
|
.unmap_sg = swiotlb_unmap_sg,
|
|
.dma_supported_op = swiotlb_dma_supported,
|
|
};
|
|
|
|
void __init pci_swiotlb_init(void)
|
|
{
|
|
if (!iommu_detected) {
|
|
#ifdef CONFIG_IA64_GENERIC
|
|
swiotlb = 1;
|
|
printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
|
|
machvec_init("dig");
|
|
swiotlb_init();
|
|
dma_ops = &swiotlb_dma_ops;
|
|
#else
|
|
panic("Unable to find Intel IOMMU");
|
|
#endif
|
|
}
|
|
}
|