3 * Copyright (C) 2001 Mike Corrigan IBM Corporation
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #ifndef _ISERIES_DMA_H
21 #define _ISERIES_DMA_H
23 #include <asm/types.h>
24 #ifndef __LINUX_SPINLOCK_H
25 #include <linux/spinlock.h>
28 // NUM_TCE_LEVELS defines the largest contiguous block
29 // of dma (tce) space we can get. NUM_TCE_LEVELS = 10
30 // allows up to 2**9 pages (512 * 4096) = 2 MB
31 #define NUM_TCE_LEVELS 10
33 #define NO_TCE ((dma_addr_t)-1)
35 // Tces come in two formats, one for the virtual bus and a different
44 u64 cacheBits :6; /* Cache hash bits - not used */
46 u64 rpn :40; /* Absolute page number */
47 u64 valid :1; /* Tce is valid (vb only) */
48 u64 allIo :1; /* Tce is valid for all lps (vb only) */
49 u64 lpIndex :8; /* LpIndex for user of TCE (vb only) */
50 u64 pciWrite :1; /* Write allowed (pci only) */
51 u64 readWrite :1; /* Read allowed (pci), Write allowed
57 unsigned long numBits;
58 unsigned long numBytes;
62 struct MultiLevelBitmap {
63 unsigned long maxLevel;
64 struct Bitmap level[NUM_TCE_LEVELS];
73 struct MultiLevelBitmap mlbm;
76 struct HvTceTableManagerCB {
77 u64 busNumber; /* Bus number for this tce table */
78 u64 start; /* Will be NULL for secondary */
79 u64 totalSize; /* Size (in pages) of whole table */
80 u64 startOffset; /* Index into real tce table of the
81 start of our section */
82 u64 size; /* Size (in pages) of our section */
83 u64 index; /* Index of this tce table (token?) */
84 u16 maxTceTableIndex; /* Max number of tables for partition */
85 u8 virtualBusFlag; /* Flag to indicate virtual bus */
89 extern struct TceTable virtBusTceTable; /* Tce table for virtual bus */
91 extern struct TceTable * build_tce_table( struct HvTceTableManagerCB *,
93 extern void create_virtual_bus_tce_table( void );
95 extern void create_pci_bus_tce_table( unsigned busNumber );
97 #endif // _ISERIES_DMA_H