2 * Copyright(c) 2004 - 2007 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_DMA_VERSION "2.04"
35 msix_multi_vector = 1,
36 msix_single_vector = 2,
41 #define IOAT_LOW_COMPLETION_MASK 0xffffffc0
42 #define IOAT_DMA_DCA_ANY_CPU ~0
46 * struct ioatdma_device - internal representation of a IOAT device
47 * @pdev: PCI-Express device
48 * @reg_base: MMIO register space base address
49 * @dma_pool: for allocating DMA descriptors
50 * @common: embedded struct dma_device
51 * @version: version of ioatdma device
52 * @irq_mode: which style irq to use
53 * @msix_entries: irq handlers
54 * @idx: per channel data
57 struct ioatdma_device {
59 void __iomem *reg_base;
60 struct pci_pool *dma_pool;
61 struct pci_pool *completion_pool;
62 struct dma_device common;
64 enum ioat_interrupt irq_mode;
65 struct msix_entry msix_entries[4];
66 struct ioat_dma_chan *idx[4];
70 * struct ioat_dma_chan - internal representation of a DMA channel
72 struct ioat_dma_chan {
74 void __iomem *reg_base;
76 dma_cookie_t completed_cookie;
77 unsigned long last_completion;
79 size_t xfercap; /* XFERCAP register value expanded out */
81 spinlock_t cleanup_lock;
83 struct list_head free_desc;
84 struct list_head used_desc;
90 struct ioatdma_device *device;
91 struct dma_chan common;
93 dma_addr_t completion_addr;
95 u64 full; /* HW completion writeback */
101 struct tasklet_struct cleanup_task;
104 /* wrapper around hardware descriptor format + additional software fields */
107 * struct ioat_desc_sw - wrapper around hardware descriptor
108 * @hw: hardware DMA descriptor
109 * @node: this descriptor will either be on the free list,
110 * or attached to a transaction list (async_tx.tx_list)
111 * @tx_cnt: number of descriptors required to complete the transaction
112 * @async_tx: the generic software descriptor for all engines
114 struct ioat_desc_sw {
115 struct ioat_dma_descriptor *hw;
116 struct list_head node;
121 struct dma_async_tx_descriptor async_tx;
124 #if defined(CONFIG_INTEL_IOATDMA) || defined(CONFIG_INTEL_IOATDMA_MODULE)
125 struct ioatdma_device *ioat_dma_probe(struct pci_dev *pdev,
126 void __iomem *iobase);
127 void ioat_dma_remove(struct ioatdma_device *device);
128 struct dca_provider *ioat_dca_init(struct pci_dev *pdev, void __iomem *iobase);
129 struct dca_provider *ioat2_dca_init(struct pci_dev *pdev, void __iomem *iobase);
131 #define ioat_dma_probe(pdev, iobase) NULL
132 #define ioat_dma_remove(device) do { } while (0)
133 #define ioat_dca_init(pdev, iobase) NULL
134 #define ioat2_dca_init(pdev, iobase) NULL
137 #endif /* IOATDMA_H */