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bff6547bb6
This patch makes it possible to compile Calgary in but not use it by default. In this mode, use 'iommu=calgary' to activate it. Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> Signed-off-by: Andi Kleen <ak@suse.de>
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*
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* Derived from include/asm-powerpc/iommu.h
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*
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* Copyright (C) IBM Corporation, 2006
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*
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* Author: Jon Mason <jdmason@us.ibm.com>
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* Author: Muli Ben-Yehuda <muli@il.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _ASM_X86_64_CALGARY_H
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#define _ASM_X86_64_CALGARY_H
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#include <linux/spinlock.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <asm/types.h>
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struct iommu_table {
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unsigned long it_base; /* mapped address of tce table */
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unsigned long it_hint; /* Hint for next alloc */
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unsigned long *it_map; /* A simple allocation bitmap for now */
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void __iomem *bbar; /* Bridge BAR */
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u64 tar_val; /* Table Address Register */
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struct timer_list watchdog_timer;
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spinlock_t it_lock; /* Protects it_map */
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unsigned int it_size; /* Size of iommu table in entries */
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unsigned char it_busno; /* Bus number this table belongs to */
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};
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#define TCE_TABLE_SIZE_UNSPECIFIED ~0
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#define TCE_TABLE_SIZE_64K 0
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#define TCE_TABLE_SIZE_128K 1
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#define TCE_TABLE_SIZE_256K 2
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#define TCE_TABLE_SIZE_512K 3
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#define TCE_TABLE_SIZE_1M 4
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#define TCE_TABLE_SIZE_2M 5
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#define TCE_TABLE_SIZE_4M 6
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#define TCE_TABLE_SIZE_8M 7
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extern int use_calgary;
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#ifdef CONFIG_CALGARY_IOMMU
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extern int calgary_iommu_init(void);
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extern void detect_calgary(void);
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#else
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static inline int calgary_iommu_init(void) { return 1; }
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static inline void detect_calgary(void) { return; }
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#endif
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#endif /* _ASM_X86_64_CALGARY_H */
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