8ab89567da
Split the general PCI startup from the DMA handling code in order to
prepare for adding support for DCA services and future versions of the
ioatdma device.
[Rusty Russell] Removal of __unsafe() usage.
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
|
|
* 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
|
|
|
|
/**
|
|
* struct ioatdma_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
|
|
* @version: version of ioatdma device
|
|
*/
|
|
|
|
struct ioatdma_device {
|
|
struct pci_dev *pdev;
|
|
void __iomem *reg_base;
|
|
struct pci_pool *dma_pool;
|
|
struct pci_pool *completion_pool;
|
|
struct dma_device common;
|
|
u8 version;
|
|
};
|
|
|
|
/**
|
|
* 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 ioatdma_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: this descriptor will either be on the free list,
|
|
* or attached to a transaction list (async_tx.tx_list)
|
|
* @tx_cnt: number of descriptors required to complete the transaction
|
|
* @async_tx: the generic software descriptor for all engines
|
|
*/
|
|
struct ioat_desc_sw {
|
|
struct ioat_dma_descriptor *hw;
|
|
struct list_head node;
|
|
int tx_cnt;
|
|
DECLARE_PCI_UNMAP_LEN(len)
|
|
DECLARE_PCI_UNMAP_ADDR(src)
|
|
DECLARE_PCI_UNMAP_ADDR(dst)
|
|
struct dma_async_tx_descriptor async_tx;
|
|
};
|
|
|
|
#if defined(CONFIG_INTEL_IOATDMA) || defined(CONFIG_INTEL_IOATDMA_MODULE)
|
|
struct ioatdma_device *ioat_dma_probe(struct pci_dev *pdev,
|
|
void __iomem *iobase);
|
|
void ioat_dma_remove(struct ioatdma_device *device);
|
|
#else
|
|
#define ioat_dma_probe(pdev, iobase) NULL
|
|
#define ioat_dma_remove(device) do { } while (0)
|
|
#endif
|
|
|
|
#endif /* IOATDMA_H */
|