tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * Derived from include/asm-powerpc/iommu.h
3 *
4 * Copyright (C) IBM Corporation, 2006
5 *
6 * Author: Jon Mason <jdmason@us.ibm.com>
7 * Author: Muli Ben-Yehuda <muli@il.ibm.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#ifndef _ASM_X86_64_CALGARY_H
25#define _ASM_X86_64_CALGARY_H
26
27#include <linux/spinlock.h>
28#include <linux/device.h>
29#include <linux/dma-mapping.h>
30#include <asm/types.h>
31
32struct iommu_table {
33 unsigned long it_base; /* mapped address of tce table */
34 unsigned long it_hint; /* Hint for next alloc */
35 unsigned long *it_map; /* A simple allocation bitmap for now */
36 void __iomem *bbar; /* Bridge BAR */
37 u64 tar_val; /* Table Address Register */
38 struct timer_list watchdog_timer;
39 spinlock_t it_lock; /* Protects it_map */
40 unsigned int it_size; /* Size of iommu table in entries */
41 unsigned char it_busno; /* Bus number this table belongs to */
42};
43
44#define TCE_TABLE_SIZE_UNSPECIFIED ~0
45#define TCE_TABLE_SIZE_64K 0
46#define TCE_TABLE_SIZE_128K 1
47#define TCE_TABLE_SIZE_256K 2
48#define TCE_TABLE_SIZE_512K 3
49#define TCE_TABLE_SIZE_1M 4
50#define TCE_TABLE_SIZE_2M 5
51#define TCE_TABLE_SIZE_4M 6
52#define TCE_TABLE_SIZE_8M 7
53
54extern int use_calgary;
55
56#ifdef CONFIG_CALGARY_IOMMU
57extern int calgary_iommu_init(void);
58extern void detect_calgary(void);
59#else
60static inline int calgary_iommu_init(void) { return 1; }
61static inline void detect_calgary(void) { return; }
62#endif
63
64#endif /* _ASM_X86_64_CALGARY_H */