linux_dsm_epyc7002/arch/powerpc/include/asm/swiotlb.h

/*
 * Copyright (C) 2009 Becky Bruce, Freescale Semiconductor
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */

#ifndef __ASM_SWIOTLB_H
#define __ASM_SWIOTLB_H

#include <linux/swiotlb.h>

extern unsigned int ppc_swiotlb_enable;

#ifdef CONFIG_SWIOTLB
void swiotlb_detect_4g(void);
#else
static inline void swiotlb_detect_4g(void) {}
#endif

#endif /* __ASM_SWIOTLB_H */
powerpc: Add support for swiotlb on 32-bit This patch includes the basic infrastructure to use swiotlb bounce buffering on 32-bit powerpc. It is not yet enabled on any platforms. Probably the most interesting bit is the addition of addr_needs_map to dma_ops - we need this as a dma_op because the decision of whether or not an addr can be mapped by a device is device-specific. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 2009-05-14 19:42:28 +07:00			`/*`
			`* Copyright (C) 2009 Becky Bruce, Freescale Semiconductor`
			`*`
			`* This program is free software; you can redistribute it and/or modify it`
			`* under the terms of the GNU General Public License as published by the`
			`* Free Software Foundation; either version 2 of the License, or (at your`
			`* option) any later version.`
			`*`
			`*/`

			`#ifndef __ASM_SWIOTLB_H`
			`#define __ASM_SWIOTLB_H`

			`#include <linux/swiotlb.h>`

			`extern unsigned int ppc_swiotlb_enable;`

powerpc/swiotlb: Enable at early stage and disable if not necessary Remove the dependency on PCI initialization for SWIOTLB initialization. So that PCI can be initialized at proper time. SWIOTLB is partly determined by PCI inbound/outbound map which is assigned in PCI initialization. But swiotlb_init() should be done at the stage of mem_init() which is much earlier than PCI initialization. So we reserve the memory for SWIOTLB first and free it if not necessary. All boards are converted to fit this change. Signed-off-by: Jia Hongtao <B38951@freescale.com> Signed-off-by: Li Yang <leoli@freescale.com> Acked-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 2012-08-03 17:14:10 +07:00			`#ifdef CONFIG_SWIOTLB`
			`void swiotlb_detect_4g(void);`
			`#else`
			`static inline void swiotlb_detect_4g(void) {}`
			`#endif`

powerpc: Add support for swiotlb on 32-bit This patch includes the basic infrastructure to use swiotlb bounce buffering on 32-bit powerpc. It is not yet enabled on any platforms. Probably the most interesting bit is the addition of addr_needs_map to dma_ops - we need this as a dma_op because the decision of whether or not an addr can be mapped by a device is device-specific. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> 2009-05-14 19:42:28 +07:00			`#endif /* __ASM_SWIOTLB_H */`