1 /*
2 * Derived from include/asm-powerpc/iommu.h
3 *
4 * Copyright IBM Corporation, 2006-2007
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_CALGARY_H
25 #define _ASM_X86_CALGARY_H
26
27 #include <linux/spinlock.h>
28 #include <linux/device.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/timer.h>
31 #include <asm/types.h>
32
33 struct iommu_table {
34 struct cal_chipset_ops *chip_ops; /* chipset specific funcs */
35 unsigned long it_base; /* mapped address of tce table */
36 unsigned long it_hint; /* Hint for next alloc */
37 unsigned long *it_map; /* A simple allocation bitmap for now */
38 void __iomem *bbar; /* Bridge BAR */
39 u64 tar_val; /* Table Address Register */
40 struct timer_list watchdog_timer;
41 spinlock_t it_lock; /* Protects it_map */
42 unsigned int it_size; /* Size of iommu table in entries */
43 unsigned char it_busno; /* Bus number this table belongs to */
44 };
45
46 struct cal_chipset_ops {
47 void (*handle_quirks)(struct iommu_table *tbl, struct pci_dev *dev);
48 void (*tce_cache_blast)(struct iommu_table *tbl);
49 void (*dump_error_regs)(struct iommu_table *tbl);
50 };
51
52 #define TCE_TABLE_SIZE_UNSPECIFIED ~0
53 #define TCE_TABLE_SIZE_64K 0
54 #define TCE_TABLE_SIZE_128K 1
55 #define TCE_TABLE_SIZE_256K 2
56 #define TCE_TABLE_SIZE_512K 3
57 #define TCE_TABLE_SIZE_1M 4
58 #define TCE_TABLE_SIZE_2M 5
59 #define TCE_TABLE_SIZE_4M 6
60 #define TCE_TABLE_SIZE_8M 7
61
62 extern int use_calgary;
63
64 #ifdef CONFIG_CALGARY_IOMMU
65 extern int detect_calgary(void);
66 #else
detect_calgary(void)67 static inline int detect_calgary(void) { return -ENODEV; }
68 #endif
69
70 #endif /* _ASM_X86_CALGARY_H */
71