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 @@ +/* + * 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> + +#define PCI_DEVICE_ID_INTEL_IOAT 0x1a38 + +#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 *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 *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 */ + |