From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- .../mips/include/asm/mach-ath25/dma-coherence.h | 76 ++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 kernel/arch/mips/include/asm/mach-ath25/dma-coherence.h (limited to 'kernel/arch/mips/include/asm/mach-ath25/dma-coherence.h') diff --git a/kernel/arch/mips/include/asm/mach-ath25/dma-coherence.h b/kernel/arch/mips/include/asm/mach-ath25/dma-coherence.h new file mode 100644 index 000000000..d5defdde3 --- /dev/null +++ b/kernel/arch/mips/include/asm/mach-ath25/dma-coherence.h @@ -0,0 +1,76 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2006 Ralf Baechle + * Copyright (C) 2007 Felix Fietkau + * + */ +#ifndef __ASM_MACH_ATH25_DMA_COHERENCE_H +#define __ASM_MACH_ATH25_DMA_COHERENCE_H + +#include + +/* + * We need some arbitrary non-zero value to be programmed to the BAR1 register + * of PCI host controller to enable DMA. The same value should be used as the + * offset to calculate the physical address of DMA buffer for PCI devices. + */ +#define AR2315_PCI_HOST_SDRAM_BASEADDR 0x20000000 + +static inline dma_addr_t ath25_dev_offset(struct device *dev) +{ +#ifdef CONFIG_PCI + extern struct bus_type pci_bus_type; + + if (dev && dev->bus == &pci_bus_type) + return AR2315_PCI_HOST_SDRAM_BASEADDR; +#endif + return 0; +} + +static inline dma_addr_t +plat_map_dma_mem(struct device *dev, void *addr, size_t size) +{ + return virt_to_phys(addr) + ath25_dev_offset(dev); +} + +static inline dma_addr_t +plat_map_dma_mem_page(struct device *dev, struct page *page) +{ + return page_to_phys(page) + ath25_dev_offset(dev); +} + +static inline unsigned long +plat_dma_addr_to_phys(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr - ath25_dev_offset(dev); +} + +static inline void +plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr, size_t size, + enum dma_data_direction direction) +{ +} + +static inline int plat_dma_supported(struct device *dev, u64 mask) +{ + return 1; +} + +static inline int plat_device_is_coherent(struct device *dev) +{ +#ifdef CONFIG_DMA_COHERENT + return 1; +#endif +#ifdef CONFIG_DMA_NONCOHERENT + return 0; +#endif +} + +static inline void plat_post_dma_flush(struct device *dev) +{ +} + +#endif /* __ASM_MACH_ATH25_DMA_COHERENCE_H */ -- cgit 1.2.3-korg