kernel-ark/drivers/dma/ioatdma_hw.h
Shannon Nelson 7bb67c14fd I/OAT: Add support for version 2 of ioatdma device
Add support for version 2 of the ioatdma device.  This device handles
the descriptor chain and DCA services slightly differently:
 - Instead of moving the dma descriptors between a busy and an idle chain,
   this new version uses a single circular chain so that we don't have
   rewrite the next_descriptor pointers as we add new requests, and the
   device doesn't need to re-read the last descriptor.
 - The new device has the DCA tags defined internally instead of needing
   them defined statically.

Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Cc: "Williams, Dan J" <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-14 18:45:41 -08:00

70 lines
2.3 KiB
C

/*
* Copyright(c) 2004 - 2007 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 _IOAT_HW_H_
#define _IOAT_HW_H_
/* PCI Configuration Space Values */
#define IOAT_PCI_VID 0x8086
/* CB device ID's */
#define IOAT_PCI_DID_5000 0x1A38
#define IOAT_PCI_DID_CNB 0x360B
#define IOAT_PCI_DID_SCNB 0x65FF
#define IOAT_PCI_DID_SNB 0x402F
#define IOAT_PCI_RID 0x00
#define IOAT_PCI_SVID 0x8086
#define IOAT_PCI_SID 0x8086
#define IOAT_VER_1_2 0x12 /* Version 1.2 */
#define IOAT_VER_2_0 0x20 /* Version 2.0 */
struct ioat_dma_descriptor {
uint32_t size;
uint32_t ctl;
uint64_t src_addr;
uint64_t dst_addr;
uint64_t next;
uint64_t rsv1;
uint64_t rsv2;
uint64_t user1;
uint64_t user2;
};
#define IOAT_DMA_DESCRIPTOR_CTL_INT_GN 0x00000001
#define IOAT_DMA_DESCRIPTOR_CTL_SRC_SN 0x00000002
#define IOAT_DMA_DESCRIPTOR_CTL_DST_SN 0x00000004
#define IOAT_DMA_DESCRIPTOR_CTL_CP_STS 0x00000008
#define IOAT_DMA_DESCRIPTOR_CTL_FRAME 0x00000010
#define IOAT_DMA_DESCRIPTOR_NUL 0x00000020
#define IOAT_DMA_DESCRIPTOR_CTL_SP_BRK 0x00000040
#define IOAT_DMA_DESCRIPTOR_CTL_DP_BRK 0x00000080
#define IOAT_DMA_DESCRIPTOR_CTL_BNDL 0x00000100
#define IOAT_DMA_DESCRIPTOR_CTL_DCA 0x00000200
#define IOAT_DMA_DESCRIPTOR_CTL_BUFHINT 0x00000400
#define IOAT_DMA_DESCRIPTOR_CTL_OPCODE_CONTEXT 0xFF000000
#define IOAT_DMA_DESCRIPTOR_CTL_OPCODE_DMA 0x00000000
#define IOAT_DMA_DESCRIPTOR_CTL_CONTEXT_DCA 0x00000001
#define IOAT_DMA_DESCRIPTOR_CTL_OPCODE_MASK 0xFF000000
#endif