2 * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved.
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)
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
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.
18 * The full GNU General Public License is included in this distribution in the
19 * file called COPYING.
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 #include <linux/pci_ids.h>
31 #define IOAT_LOW_COMPLETION_MASK 0xffffffc0
33 extern struct list_head dma_device_list;
34 extern struct list_head dma_client_list;
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
47 void __iomem *reg_base;
48 struct pci_pool *dma_pool;
49 struct pci_pool *completion_pool;
51 struct dma_device common;
56 * struct ioat_dma_chan - internal representation of a DMA channel
63 * @completed_cookie: last cookie seen completed on cleanup
64 * @cookie: value of last cookie given to client
74 struct ioat_dma_chan {
76 void __iomem *reg_base;
78 dma_cookie_t completed_cookie;
79 unsigned long last_completion;
81 u32 xfercap; /* XFERCAP register value expanded out */
83 spinlock_t cleanup_lock;
85 struct list_head free_desc;
86 struct list_head used_desc;
90 struct ioat_device *device;
91 struct dma_chan common;
93 dma_addr_t completion_addr;
95 u64 full; /* HW completion writeback */
103 /* wrapper around hardware descriptor format + additional software fields */
106 * struct ioat_desc_sw - wrapper around hardware descriptor
107 * @hw: hardware DMA descriptor
113 struct ioat_desc_sw {
114 struct ioat_dma_descriptor *hw;
115 struct list_head node;
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)
124 #endif /* IOATDMA_H */