| /* |
| * pci_dma.h |
| * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen IBM Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #ifndef _PCI_DMA_H |
| #define _PCI_DMA_H |
| |
| #include <asm/types.h> |
| #include <linux/spinlock.h> |
| |
| /* |
| * NUM_TCE_LEVELS defines the largest contiguous block |
| * of dma (tce) space we can get. NUM_TCE_LEVELS = 10 |
| * allows up to 2**9 pages (512 * 4096) = 2 MB |
| */ |
| #define NUM_TCE_LEVELS 10 |
| |
| #define NO_TCE ((dma_addr_t)-1) |
| |
| /* |
| * Tces come in two formats, one for the virtual bus and a different |
| * format for PCI |
| */ |
| #define TCE_VB 0 |
| #define TCE_PCI 1 |
| |
| union Tce { |
| u64 wholeTce; |
| struct { |
| u64 cacheBits :6; /* Cache hash bits - not used */ |
| u64 rsvd :6; |
| u64 rpn :40; /* Absolute page number */ |
| u64 valid :1; /* Tce is valid (vb only) */ |
| u64 allIo :1; /* Tce is valid for all lps (vb only) */ |
| u64 lpIndex :8; /* LpIndex for user of TCE (vb only) */ |
| u64 pciWrite :1; /* Write allowed (pci only) */ |
| u64 readWrite :1; /* Read allowed (pci), Write allowed (vb) */ |
| } tceBits; |
| }; |
| |
| struct Bitmap { |
| unsigned long numBits; |
| unsigned long numBytes; |
| unsigned char * map; |
| }; |
| |
| struct MultiLevelBitmap { |
| unsigned long maxLevel; |
| struct Bitmap level[NUM_TCE_LEVELS]; |
| }; |
| |
| struct TceTable { |
| u64 busNumber; |
| u64 size; |
| u64 startOffset; |
| u64 base; /* pSeries native only */ |
| u64 index; |
| u64 tceType; |
| spinlock_t lock; |
| struct MultiLevelBitmap mlbm; |
| }; |
| |
| struct TceTableManagerCB { |
| u64 busNumber; /* Bus number for this tce table */ |
| u64 start; /* Will be NULL for secondary */ |
| u64 totalSize; /* Size (in pages) of whole table */ |
| u64 startOffset; /* Index into real tce table of the |
| start of our section */ |
| u64 size; /* Size (in pages) of our section */ |
| u64 index; /* Index of this tce table (token?) */ |
| u16 maxTceTableIndex; /* Max num of tables for partition */ |
| u8 virtualBusFlag; /* Flag to indicate virtual bus */ |
| u8 logicalSlot; /* IOA Tce Slot Index */ |
| u8 rsvd[4]; |
| }; |
| |
| extern struct TceTable virtBusTceTable; /* Tce table for virtual bus */ |
| |
| extern void create_tce_tables(void); |
| extern void create_pci_bus_tce_table(unsigned long); |
| |
| void tce_init_pSeries(void); |
| void tce_init_iSeries(void); |
| |
| #endif |