1 /* 2 * pci_dma.h 3 * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation 4 * 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. 9 * 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. 14 * 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 18 */ 19 20 #ifndef _PCI_DMA_H 21 #define _PCI_DMA_H 22 23 #include <asm/types.h> 24 #include <linux/spinlock.h> 25 26 /* 27 * NUM_TCE_LEVELS defines the largest contiguous block 28 * of dma (tce) space we can get. NUM_TCE_LEVELS = 10 29 * allows up to 2**9 pages (512 * 4096) = 2 MB 30 */ 31 #define NUM_TCE_LEVELS 10 32 33 #define NO_TCE ((dma_addr_t)-1) 34 35 /* 36 * Tces come in two formats, one for the virtual bus and a different 37 * format for PCI 38 */ 39 #define TCE_VB 0 40 #define TCE_PCI 1 41 42 union Tce { 43 u64 wholeTce; 44 struct { 45 u64 cacheBits :6; /* Cache hash bits - not used */ 46 u64 rsvd :6; 47 u64 rpn :40; /* Absolute page number */ 48 u64 valid :1; /* Tce is valid (vb only) */ 49 u64 allIo :1; /* Tce is valid for all lps (vb only) */ 50 u64 lpIndex :8; /* LpIndex for user of TCE (vb only) */ 51 u64 pciWrite :1; /* Write allowed (pci only) */ 52 u64 readWrite :1; /* Read allowed (pci), Write allowed (vb) */ 53 } tceBits; 54 }; 55 56 struct Bitmap { 57 unsigned long numBits; 58 unsigned long numBytes; 59 unsigned char * map; 60 }; 61 62 struct MultiLevelBitmap { 63 unsigned long maxLevel; 64 struct Bitmap level[NUM_TCE_LEVELS]; 65 }; 66 67 struct TceTable { 68 u64 busNumber; 69 u64 size; 70 u64 startOffset; 71 u64 base; /* pSeries native only */ 72 u64 index; 73 u64 tceType; 74 spinlock_t lock; 75 struct MultiLevelBitmap mlbm; 76 }; 77 78 struct TceTableManagerCB { 79 u64 busNumber; /* Bus number for this tce table */ 80 u64 start; /* Will be NULL for secondary */ 81 u64 totalSize; /* Size (in pages) of whole table */ 82 u64 startOffset; /* Index into real tce table of the 83 start of our section */ 84 u64 size; /* Size (in pages) of our section */ 85 u64 index; /* Index of this tce table (token?) */ 86 u16 maxTceTableIndex; /* Max num of tables for partition */ 87 u8 virtualBusFlag; /* Flag to indicate virtual bus */ 88 u8 logicalSlot; /* IOA Tce Slot Index */ 89 u8 rsvd[4]; 90 }; 91 92 extern struct TceTable virtBusTceTable; /* Tce table for virtual bus */ 93 94 extern void create_tce_tables(void); 95 extern void create_pci_bus_tce_table(unsigned long); 96 97 void tce_init_pSeries(void); 98 void tce_init_iSeries(void); 99 100 #endif 101