projects / linux.git / blame
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|---|---|---|
| 0bbd5f4e CL |
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> | |
| 57c651f7 | 29 | #include <linux/pci_ids.h> |
| 0bbd5f4e CL |
30 | |
| 31 | #define IOAT_LOW_COMPLETION_MASK 0xffffffc0 | |
| 32 | ||
| 33 | extern struct list_head dma_device_list; | |
| 34 | extern struct list_head dma_client_list; | |
| 35 | ||
| 36 | /** | |
| 37 | * struct ioat_device - internal representation of a IOAT device | |
| 38 | * @pdev: PCI-Express device | |
| 39 | * @reg_base: MMIO register space base address | |
| 40 | * @dma_pool: for allocating DMA descriptors | |
| 41 | * @common: embedded struct dma_device | |
| 42 | * @msi: Message Signaled Interrupt number | |
| 43 | */ | |
| 44 | ||
| 45 | struct ioat_device { | |
| 46 | struct pci_dev *pdev; | |
| 47b16539 | 47 | void __iomem *reg_base; |
| 0bbd5f4e CL |
48 | struct pci_pool *dma_pool; |
| 49 | struct pci_pool *completion_pool; | |
| 50 | ||
| 51 | struct dma_device common; | |
| 52 | u8 msi; | |
| 53 | }; | |
| 54 | ||
| 55 | /** | |
| 56 | * struct ioat_dma_chan - internal representation of a DMA channel | |
| 57 | * @device: | |
| 58 | * @reg_base: | |
| 59 | * @sw_in_use: | |
| 60 | * @completion: | |
| 61 | * @completion_low: | |
| 62 | * @completion_high: | |
| 63 | * @completed_cookie: last cookie seen completed on cleanup | |
| 64 | * @cookie: value of last cookie given to client | |
| 65 | * @last_completion: | |
| 66 | * @xfercap: | |
| 67 | * @desc_lock: | |
| 68 | * @free_desc: | |
| 69 | * @used_desc: | |
| 70 | * @resource: | |
| 71 | * @device_node: | |
| 72 | */ | |
| 73 | ||
| 74 | struct ioat_dma_chan { | |
| 75 | ||
| 47b16539 | 76 | void __iomem *reg_base; |
| 0bbd5f4e CL |
77 | |
| 78 | dma_cookie_t completed_cookie; | |
| 79 | unsigned long last_completion; | |
| 80 | ||
| 81 | u32 xfercap; /* XFERCAP register value expanded out */ | |
| 82 | ||
| 83 | spinlock_t cleanup_lock; | |
| 84 | spinlock_t desc_lock; | |
| 85 | struct list_head free_desc; | |
| 86 | struct list_head used_desc; | |
| 87 | ||
| 88 | int pending; | |
| 89 | ||
| 90 | struct ioat_device *device; | |
| 91 | struct dma_chan common; | |
| 92 | ||
| 93 | dma_addr_t completion_addr; | |
| 94 | union { | |
| 95 | u64 full; /* HW completion writeback */ | |
| 96 | struct { | |
| 97 | u32 low; | |
| 98 | u32 high; | |
| 99 | }; | |
| 100 | } *completion_virt; | |
| 101 | }; | |
| 102 | ||
| 103 | /* wrapper around hardware descriptor format + additional software fields */ | |
| 104 | ||
| 105 | /** | |
| 106 | * struct ioat_desc_sw - wrapper around hardware descriptor | |
| 107 | * @hw: hardware DMA descriptor | |
| 108 | * @node: | |
| 109 | * @cookie: | |
| 110 | * @phys: | |
| 111 | */ | |
| 112 | ||
| 113 | struct ioat_desc_sw { | |
| 114 | struct ioat_dma_descriptor *hw; | |
| 115 | struct list_head node; | |
| 116 | dma_cookie_t cookie; | |
| 117 | dma_addr_t phys; | |
| 118 | DECLARE_PCI_UNMAP_ADDR(src) | |
| 119 | DECLARE_PCI_UNMAP_LEN(src_len) | |
| 120 | DECLARE_PCI_UNMAP_ADDR(dst) | |
| 121 | DECLARE_PCI_UNMAP_LEN(dst_len) | |
| 122 | }; | |
| 123 | ||
| 124 | #endif /* IOATDMA_H */ | |
| 125 |