diff options
Diffstat (limited to 'drivers/dma/ioatdma.h')
-rw-r--r-- | drivers/dma/ioatdma.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/dma/ioatdma.h b/drivers/dma/ioatdma.h new file mode 100644 index 000000000000..312353d12af2 --- /dev/null +++ b/drivers/dma/ioatdma.h | |||
@@ -0,0 +1,126 @@ | |||
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 | |||