Chris Leech | 0bbd5f4 | 2006-05-23 17:35:34 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License as published by the Free |
| 6 | * Software Foundation; either version 2 of the License, or (at your option) |
| 7 | * any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 59 |
| 16 | * Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | * |
| 18 | * The full GNU General Public License is included in this distribution in the |
| 19 | * file called COPYING. |
| 20 | */ |
| 21 | #ifndef IOATDMA_H |
| 22 | #define IOATDMA_H |
| 23 | |
| 24 | #include <linux/dmaengine.h> |
| 25 | #include "ioatdma_hw.h" |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/dmapool.h> |
| 28 | #include <linux/cache.h> |
| 29 | |
| 30 | #define PCI_DEVICE_ID_INTEL_IOAT 0x1a38 |
| 31 | |
| 32 | #define IOAT_LOW_COMPLETION_MASK 0xffffffc0 |
| 33 | |
| 34 | extern struct list_head dma_device_list; |
| 35 | extern struct list_head dma_client_list; |
| 36 | |
| 37 | /** |
| 38 | * struct ioat_device - internal representation of a IOAT device |
| 39 | * @pdev: PCI-Express device |
| 40 | * @reg_base: MMIO register space base address |
| 41 | * @dma_pool: for allocating DMA descriptors |
| 42 | * @common: embedded struct dma_device |
| 43 | * @msi: Message Signaled Interrupt number |
| 44 | */ |
| 45 | |
| 46 | struct ioat_device { |
| 47 | struct pci_dev *pdev; |
| 48 | void *reg_base; |
| 49 | struct pci_pool *dma_pool; |
| 50 | struct pci_pool *completion_pool; |
| 51 | |
| 52 | struct dma_device common; |
| 53 | u8 msi; |
| 54 | }; |
| 55 | |
| 56 | /** |
| 57 | * struct ioat_dma_chan - internal representation of a DMA channel |
| 58 | * @device: |
| 59 | * @reg_base: |
| 60 | * @sw_in_use: |
| 61 | * @completion: |
| 62 | * @completion_low: |
| 63 | * @completion_high: |
| 64 | * @completed_cookie: last cookie seen completed on cleanup |
| 65 | * @cookie: value of last cookie given to client |
| 66 | * @last_completion: |
| 67 | * @xfercap: |
| 68 | * @desc_lock: |
| 69 | * @free_desc: |
| 70 | * @used_desc: |
| 71 | * @resource: |
| 72 | * @device_node: |
| 73 | */ |
| 74 | |
| 75 | struct ioat_dma_chan { |
| 76 | |
| 77 | void *reg_base; |
| 78 | |
| 79 | dma_cookie_t completed_cookie; |
| 80 | unsigned long last_completion; |
| 81 | |
| 82 | u32 xfercap; /* XFERCAP register value expanded out */ |
| 83 | |
| 84 | spinlock_t cleanup_lock; |
| 85 | spinlock_t desc_lock; |
| 86 | struct list_head free_desc; |
| 87 | struct list_head used_desc; |
| 88 | |
| 89 | int pending; |
| 90 | |
| 91 | struct ioat_device *device; |
| 92 | struct dma_chan common; |
| 93 | |
| 94 | dma_addr_t completion_addr; |
| 95 | union { |
| 96 | u64 full; /* HW completion writeback */ |
| 97 | struct { |
| 98 | u32 low; |
| 99 | u32 high; |
| 100 | }; |
| 101 | } *completion_virt; |
| 102 | }; |
| 103 | |
| 104 | /* wrapper around hardware descriptor format + additional software fields */ |
| 105 | |
| 106 | /** |
| 107 | * struct ioat_desc_sw - wrapper around hardware descriptor |
| 108 | * @hw: hardware DMA descriptor |
| 109 | * @node: |
| 110 | * @cookie: |
| 111 | * @phys: |
| 112 | */ |
| 113 | |
| 114 | struct ioat_desc_sw { |
| 115 | struct ioat_dma_descriptor *hw; |
| 116 | struct list_head node; |
| 117 | dma_cookie_t cookie; |
| 118 | dma_addr_t phys; |
| 119 | DECLARE_PCI_UNMAP_ADDR(src) |
| 120 | DECLARE_PCI_UNMAP_LEN(src_len) |
| 121 | DECLARE_PCI_UNMAP_ADDR(dst) |
| 122 | DECLARE_PCI_UNMAP_LEN(dst_len) |
| 123 | }; |
| 124 | |
| 125 | #endif /* IOATDMA_H */ |
| 126 | |