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- /*
- * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * The full GNU General Public License is included in this distribution in the
- * file called COPYING.
- */
- #ifndef IOATDMA_H
- #define IOATDMA_H
- #include <linux/dmaengine.h>
- #include "ioatdma_hw.h"
- #include <linux/init.h>
- #include <linux/dmapool.h>
- #include <linux/cache.h>
- #include <linux/pci_ids.h>
- #define IOAT_LOW_COMPLETION_MASK 0xffffffc0
- extern struct list_head dma_device_list;
- extern struct list_head dma_client_list;
- /**
- * struct ioat_device - internal representation of a IOAT device
- * @pdev: PCI-Express device
- * @reg_base: MMIO register space base address
- * @dma_pool: for allocating DMA descriptors
- * @common: embedded struct dma_device
- * @msi: Message Signaled Interrupt number
- */
- struct ioat_device {
- struct pci_dev *pdev;
- void __iomem *reg_base;
- struct pci_pool *dma_pool;
- struct pci_pool *completion_pool;
- struct dma_device common;
- u8 msi;
- };
- /**
- * struct ioat_dma_chan - internal representation of a DMA channel
- * @device:
- * @reg_base:
- * @sw_in_use:
- * @completion:
- * @completion_low:
- * @completion_high:
- * @completed_cookie: last cookie seen completed on cleanup
- * @cookie: value of last cookie given to client
- * @last_completion:
- * @xfercap:
- * @desc_lock:
- * @free_desc:
- * @used_desc:
- * @resource:
- * @device_node:
- */
- struct ioat_dma_chan {
- void __iomem *reg_base;
- dma_cookie_t completed_cookie;
- unsigned long last_completion;
- u32 xfercap; /* XFERCAP register value expanded out */
- spinlock_t cleanup_lock;
- spinlock_t desc_lock;
- struct list_head free_desc;
- struct list_head used_desc;
- int pending;
- struct ioat_device *device;
- struct dma_chan common;
- dma_addr_t completion_addr;
- union {
- u64 full; /* HW completion writeback */
- struct {
- u32 low;
- u32 high;
- };
- } *completion_virt;
- };
- /* wrapper around hardware descriptor format + additional software fields */
- /**
- * struct ioat_desc_sw - wrapper around hardware descriptor
- * @hw: hardware DMA descriptor
- * @node:
- * @cookie:
- * @phys:
- */
- struct ioat_desc_sw {
- struct ioat_dma_descriptor *hw;
- struct list_head node;
- dma_cookie_t cookie;
- dma_addr_t phys;
- DECLARE_PCI_UNMAP_ADDR(src)
- DECLARE_PCI_UNMAP_LEN(src_len)
- DECLARE_PCI_UNMAP_ADDR(dst)
- DECLARE_PCI_UNMAP_LEN(dst_len)
- };
- #endif /* IOATDMA_H */
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