From 325ef1857fff8b2049322921e19421b6c5ad74e5 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 12 Apr 2018 09:33:30 +0200 Subject: PCI: remove PCI_DMA_BUS_IS_PHYS This was used by the ide, scsi and networking code in the past to determine if they should bounce payloads. Now that the dma mapping always have to support dma to all physical memory (thanks to swiotlb for non-iommu systems) there is no need to this crude hack any more. Signed-off-by: Christoph Hellwig Acked-by: Palmer Dabbelt (for riscv) Reviewed-by: Jens Axboe --- arch/parisc/include/asm/pci.h | 23 ----------------------- 1 file changed, 23 deletions(-) (limited to 'arch/parisc/include/asm') diff --git a/arch/parisc/include/asm/pci.h b/arch/parisc/include/asm/pci.h index 96b7deec512d..3328fd17c19d 100644 --- a/arch/parisc/include/asm/pci.h +++ b/arch/parisc/include/asm/pci.h @@ -87,29 +87,6 @@ struct pci_hba_data { #define PCI_F_EXTEND 0UL #endif /* !CONFIG_64BIT */ -/* - * If the PCI device's view of memory is the same as the CPU's view of memory, - * PCI_DMA_BUS_IS_PHYS is true. The networking and block device layers use - * this boolean for bounce buffer decisions. - */ -#ifdef CONFIG_PA20 -/* All PA-2.0 machines have an IOMMU. */ -#define PCI_DMA_BUS_IS_PHYS 0 -#define parisc_has_iommu() do { } while (0) -#else - -#if defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA) -extern int parisc_bus_is_phys; /* in arch/parisc/kernel/setup.c */ -#define PCI_DMA_BUS_IS_PHYS parisc_bus_is_phys -#define parisc_has_iommu() do { parisc_bus_is_phys = 0; } while (0) -#else -#define PCI_DMA_BUS_IS_PHYS 1 -#define parisc_has_iommu() do { } while (0) -#endif - -#endif /* !CONFIG_PA20 */ - - /* ** Most PCI devices (eg Tulip, NCR720) also export the same registers ** to both MMIO and I/O port space. Due to poor performance of I/O Port -- cgit v1.2.3-59-g8ed1b