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| author |   Christoph Hellwig <hch@lst.de> | 2021-03-01 08:44:28 +0100 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2021-03-17 00:34:35 +0000 |
| commit | 6223d1cef7b462de9aeede5846e6dcdbbd1c4d60 (patch) | |
| tree | a2ad08b338000a97a01b4b52489c627d78eff55b /drivers/xen | |
| parent | xen-swiotlb: use is_swiotlb_buffer in is_xen_swiotlb_buffer (diff) | |
| download | linux-dev-6223d1cef7b462de9aeede5846e6dcdbbd1c4d60.tar.xz linux-dev-6223d1cef7b462de9aeede5846e6dcdbbd1c4d60.zip | |
xen-swiotlb: use io_tlb_end in xen_swiotlb_dma_supported
Use the existing variable that holds the physical address for
xen_io_tlb_end to simplify xen_swiotlb_dma_supported a bit, and remove
the otherwise unused xen_io_tlb_end variable and the xen_virt_to_bus
helper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index bffb35993c9d..e99f0614dcb9 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -46,7 +46,7 @@ * API. */ -static char *xen_io_tlb_start, *xen_io_tlb_end; +static char *xen_io_tlb_start; static unsigned long xen_io_tlb_nslabs; /* * Quick lookup value of the bus address of the IOTLB. @@ -82,11 +82,6 @@ static inline phys_addr_t xen_dma_to_phys(struct device *dev, return xen_bus_to_phys(dev, dma_to_phys(dev, dma_addr)); } -static inline dma_addr_t xen_virt_to_bus(struct device *dev, void *address) -{ - return xen_phys_to_dma(dev, virt_to_phys(address)); -} - static inline int range_straddles_page_boundary(phys_addr_t p, size_t size) { unsigned long next_bfn, xen_pfn = XEN_PFN_DOWN(p); @@ -250,7 +245,6 @@ retry: rc = swiotlb_late_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs); end: - xen_io_tlb_end = xen_io_tlb_start + bytes; if (!rc) swiotlb_set_max_segment(PAGE_SIZE); @@ -558,7 +552,7 @@ xen_swiotlb_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, static int xen_swiotlb_dma_supported(struct device *hwdev, u64 mask) { - return xen_virt_to_bus(hwdev, xen_io_tlb_end - 1) <= mask; + return xen_phys_to_dma(hwdev, io_tlb_end - 1) <= mask; } const struct dma_map_ops xen_swiotlb_dma_ops = { |