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Diffstat (limited to 'kernel/drivers/xen/swiotlb-xen.c')
-rw-r--r--kernel/drivers/xen/swiotlb-xen.c51
1 files changed, 22 insertions, 29 deletions
diff --git a/kernel/drivers/xen/swiotlb-xen.c b/kernel/drivers/xen/swiotlb-xen.c
index 4c549323c..7399782c0 100644
--- a/kernel/drivers/xen/swiotlb-xen.c
+++ b/kernel/drivers/xen/swiotlb-xen.c
@@ -76,27 +76,27 @@ static unsigned long xen_io_tlb_nslabs;
static u64 start_dma_addr;
/*
- * Both of these functions should avoid PFN_PHYS because phys_addr_t
+ * Both of these functions should avoid XEN_PFN_PHYS because phys_addr_t
* can be 32bit when dma_addr_t is 64bit leading to a loss in
* information if the shift is done before casting to 64bit.
*/
static inline dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
{
- unsigned long mfn = pfn_to_mfn(PFN_DOWN(paddr));
- dma_addr_t dma = (dma_addr_t)mfn << PAGE_SHIFT;
+ unsigned long bfn = pfn_to_bfn(XEN_PFN_DOWN(paddr));
+ dma_addr_t dma = (dma_addr_t)bfn << XEN_PAGE_SHIFT;
- dma |= paddr & ~PAGE_MASK;
+ dma |= paddr & ~XEN_PAGE_MASK;
return dma;
}
static inline phys_addr_t xen_bus_to_phys(dma_addr_t baddr)
{
- unsigned long pfn = mfn_to_pfn(PFN_DOWN(baddr));
- dma_addr_t dma = (dma_addr_t)pfn << PAGE_SHIFT;
+ unsigned long xen_pfn = bfn_to_pfn(XEN_PFN_DOWN(baddr));
+ dma_addr_t dma = (dma_addr_t)xen_pfn << XEN_PAGE_SHIFT;
phys_addr_t paddr = dma;
- paddr |= baddr & ~PAGE_MASK;
+ paddr |= baddr & ~XEN_PAGE_MASK;
return paddr;
}
@@ -106,19 +106,19 @@ static inline dma_addr_t xen_virt_to_bus(void *address)
return xen_phys_to_bus(virt_to_phys(address));
}
-static int check_pages_physically_contiguous(unsigned long pfn,
+static int check_pages_physically_contiguous(unsigned long xen_pfn,
unsigned int offset,
size_t length)
{
- unsigned long next_mfn;
+ unsigned long next_bfn;
int i;
int nr_pages;
- next_mfn = pfn_to_mfn(pfn);
- nr_pages = (offset + length + PAGE_SIZE-1) >> PAGE_SHIFT;
+ next_bfn = pfn_to_bfn(xen_pfn);
+ nr_pages = (offset + length + XEN_PAGE_SIZE-1) >> XEN_PAGE_SHIFT;
for (i = 1; i < nr_pages; i++) {
- if (pfn_to_mfn(++pfn) != ++next_mfn)
+ if (pfn_to_bfn(++xen_pfn) != ++next_bfn)
return 0;
}
return 1;
@@ -126,28 +126,27 @@ static int check_pages_physically_contiguous(unsigned long pfn,
static inline int range_straddles_page_boundary(phys_addr_t p, size_t size)
{
- unsigned long pfn = PFN_DOWN(p);
- unsigned int offset = p & ~PAGE_MASK;
+ unsigned long xen_pfn = XEN_PFN_DOWN(p);
+ unsigned int offset = p & ~XEN_PAGE_MASK;
- if (offset + size <= PAGE_SIZE)
+ if (offset + size <= XEN_PAGE_SIZE)
return 0;
- if (check_pages_physically_contiguous(pfn, offset, size))
+ if (check_pages_physically_contiguous(xen_pfn, offset, size))
return 0;
return 1;
}
static int is_xen_swiotlb_buffer(dma_addr_t dma_addr)
{
- unsigned long mfn = PFN_DOWN(dma_addr);
- unsigned long pfn = mfn_to_local_pfn(mfn);
- phys_addr_t paddr;
+ unsigned long bfn = XEN_PFN_DOWN(dma_addr);
+ unsigned long xen_pfn = bfn_to_local_pfn(bfn);
+ phys_addr_t paddr = XEN_PFN_PHYS(xen_pfn);
/* If the address is outside our domain, it CAN
* have the same virtual address as another address
* in our domain. Therefore _only_ check address within our domain.
*/
- if (pfn_valid(pfn)) {
- paddr = PFN_PHYS(pfn);
+ if (pfn_valid(PFN_DOWN(paddr))) {
return paddr >= virt_to_phys(xen_io_tlb_start) &&
paddr < virt_to_phys(xen_io_tlb_end);
}
@@ -311,9 +310,6 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
*/
flags &= ~(__GFP_DMA | __GFP_HIGHMEM);
- if (dma_alloc_from_coherent(hwdev, size, dma_handle, &ret))
- return ret;
-
/* On ARM this function returns an ioremap'ped virtual address for
* which virt_to_phys doesn't return the corresponding physical
* address. In fact on ARM virt_to_phys only works for kernel direct
@@ -356,9 +352,6 @@ xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
phys_addr_t phys;
u64 dma_mask = DMA_BIT_MASK(32);
- if (dma_release_from_coherent(hwdev, order, vaddr))
- return;
-
if (hwdev && hwdev->coherent_dma_mask)
dma_mask = hwdev->coherent_dma_mask;
@@ -398,7 +391,7 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page,
*/
if (dma_capable(dev, dev_addr, size) &&
!range_straddles_page_boundary(phys, size) &&
- !xen_arch_need_swiotlb(dev, PFN_DOWN(phys), PFN_DOWN(dev_addr)) &&
+ !xen_arch_need_swiotlb(dev, phys, dev_addr) &&
!swiotlb_force) {
/* we are not interested in the dma_addr returned by
* xen_dma_map_page, only in the potential cache flushes executed
@@ -557,7 +550,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
dma_addr_t dev_addr = xen_phys_to_bus(paddr);
if (swiotlb_force ||
- xen_arch_need_swiotlb(hwdev, PFN_DOWN(paddr), PFN_DOWN(dev_addr)) ||
+ xen_arch_need_swiotlb(hwdev, paddr, dev_addr) ||
!dma_capable(hwdev, dev_addr, sg->length) ||
range_straddles_page_boundary(paddr, sg->length)) {
phys_addr_t map = swiotlb_tbl_map_single(hwdev,