[I/OAT]: Driver for the Intel(R) I/OAT DMA engine

Adds a new ioatdma driver

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 126 insertions, 0 deletions

diff --git a/drivers/dma/ioatdma_registers.h b/drivers/dma/ioatdma_registers.h
new file mode 100644
index 000000000000..41a21ab2b000
--- /dev/null
+++ b/drivers/dma/ioatdma_registers.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 _IOAT_REGISTERS_H_
+#define _IOAT_REGISTERS_H_
+
+
+/* MMIO Device Registers */
+#define IOAT_CHANCNT_OFFSET                     0x00    /*  8-bit */
+
+#define IOAT_XFERCAP_OFFSET                     0x01    /*  8-bit */
+#define IOAT_XFERCAP_4KB                        12
+#define IOAT_XFERCAP_8KB                        13
+#define IOAT_XFERCAP_16KB                       14
+#define IOAT_XFERCAP_32KB                       15
+#define IOAT_XFERCAP_32GB                       0
+
+#define IOAT_GENCTRL_OFFSET                     0x02    /*  8-bit */
+#define IOAT_GENCTRL_DEBUG_EN                   0x01
+
+#define IOAT_INTRCTRL_OFFSET                    0x03    /*  8-bit */
+#define IOAT_INTRCTRL_MASTER_INT_EN             0x01    /* Master Interrupt Enable */
+#define IOAT_INTRCTRL_INT_STATUS                0x02    /* ATTNSTATUS -or- Channel Int */
+#define IOAT_INTRCTRL_INT                       0x04    /* INT_STATUS -and- MASTER_INT_EN */
+
+#define IOAT_ATTNSTATUS_OFFSET                  0x04    /* Each bit is a channel */
+
+#define IOAT_VER_OFFSET                         0x08    /*  8-bit */
+#define IOAT_VER_MAJOR_MASK                     0xF0
+#define IOAT_VER_MINOR_MASK                     0x0F
+#define GET_IOAT_VER_MAJOR(x)                   ((x) & IOAT_VER_MAJOR_MASK)
+#define GET_IOAT_VER_MINOR(x)                   ((x) & IOAT_VER_MINOR_MASK)
+
+#define IOAT_PERPORTOFFSET_OFFSET               0x0A    /* 16-bit */
+
+#define IOAT_INTRDELAY_OFFSET                   0x0C    /* 16-bit */
+#define IOAT_INTRDELAY_INT_DELAY_MASK           0x3FFF  /* Interrupt Delay Time */
+#define IOAT_INTRDELAY_COALESE_SUPPORT          0x8000  /* Interrupt Coalesing Supported */
+
+#define IOAT_DEVICE_STATUS_OFFSET               0x0E    /* 16-bit */
+#define IOAT_DEVICE_STATUS_DEGRADED_MODE        0x0001
+
+
+#define IOAT_CHANNEL_MMIO_SIZE                  0x80    /* Each Channel MMIO space is this size */
+
+/* DMA Channel Registers */
+#define IOAT_CHANCTRL_OFFSET                    0x00    /* 16-bit Channel Control Register */
+#define IOAT_CHANCTRL_CHANNEL_PRIORITY_MASK     0xF000
+#define IOAT_CHANCTRL_CHANNEL_IN_USE            0x0100
+#define IOAT_CHANCTRL_DESCRIPTOR_ADDR_SNOOP_CONTROL     0x0020
+#define IOAT_CHANCTRL_ERR_INT_EN                0x0010
+#define IOAT_CHANCTRL_ANY_ERR_ABORT_EN          0x0008
+#define IOAT_CHANCTRL_ERR_COMPLETION_EN         0x0004
+#define IOAT_CHANCTRL_INT_DISABLE               0x0001
+
+#define IOAT_DMA_COMP_OFFSET                    0x02    /* 16-bit DMA channel compatability */
+#define IOAT_DMA_COMP_V1                        0x0001  /* Compatability with DMA version 1 */
+
+#define IOAT_CHANSTS_OFFSET                     0x04    /* 64-bit Channel Status Register */
+#define IOAT_CHANSTS_OFFSET_LOW                 0x04
+#define IOAT_CHANSTS_OFFSET_HIGH                0x08
+#define IOAT_CHANSTS_COMPLETED_DESCRIPTOR_ADDR  0xFFFFFFFFFFFFFFC0
+#define IOAT_CHANSTS_SOFT_ERR                   0x0000000000000010
+#define IOAT_CHANSTS_DMA_TRANSFER_STATUS        0x0000000000000007
+#define IOAT_CHANSTS_DMA_TRANSFER_STATUS_ACTIVE 0x0
+#define IOAT_CHANSTS_DMA_TRANSFER_STATUS_DONE   0x1
+#define IOAT_CHANSTS_DMA_TRANSFER_STATUS_SUSPENDED      0x2
+#define IOAT_CHANSTS_DMA_TRANSFER_STATUS_HALTED 0x3
+
+#define IOAT_CHAINADDR_OFFSET                   0x0C    /* 64-bit Descriptor Chain Address Register */
+#define IOAT_CHAINADDR_OFFSET_LOW               0x0C
+#define IOAT_CHAINADDR_OFFSET_HIGH              0x10
+
+#define IOAT_CHANCMD_OFFSET                     0x14    /*  8-bit DMA Channel Command Register */
+#define IOAT_CHANCMD_RESET                      0x20
+#define IOAT_CHANCMD_RESUME                     0x10
+#define IOAT_CHANCMD_ABORT                      0x08
+#define IOAT_CHANCMD_SUSPEND                    0x04
+#define IOAT_CHANCMD_APPEND                     0x02
+#define IOAT_CHANCMD_START                      0x01
+
+#define IOAT_CHANCMP_OFFSET                     0x18    /* 64-bit Channel Completion Address Register */
+#define IOAT_CHANCMP_OFFSET_LOW                 0x18
+#define IOAT_CHANCMP_OFFSET_HIGH                0x1C
+
+#define IOAT_CDAR_OFFSET                        0x20    /* 64-bit Current Descriptor Address Register */
+#define IOAT_CDAR_OFFSET_LOW                    0x20
+#define IOAT_CDAR_OFFSET_HIGH                   0x24
+
+#define IOAT_CHANERR_OFFSET                     0x28    /* 32-bit Channel Error Register */
+#define IOAT_CHANERR_DMA_TRANSFER_SRC_ADDR_ERR  0x0001
+#define IOAT_CHANERR_DMA_TRANSFER_DEST_ADDR_ERR 0x0002
+#define IOAT_CHANERR_NEXT_DESCRIPTOR_ADDR_ERR   0x0004
+#define IOAT_CHANERR_NEXT_DESCRIPTOR_ALIGNMENT_ERR      0x0008
+#define IOAT_CHANERR_CHAIN_ADDR_VALUE_ERR       0x0010
+#define IOAT_CHANERR_CHANCMD_ERR                0x0020
+#define IOAT_CHANERR_CHIPSET_UNCORRECTABLE_DATA_INTEGRITY_ERR   0x0040
+#define IOAT_CHANERR_DMA_UNCORRECTABLE_DATA_INTEGRITY_ERR       0x0080
+#define IOAT_CHANERR_READ_DATA_ERR              0x0100
+#define IOAT_CHANERR_WRITE_DATA_ERR             0x0200
+#define IOAT_CHANERR_DESCRIPTOR_CONTROL_ERR     0x0400
+#define IOAT_CHANERR_DESCRIPTOR_LENGTH_ERR      0x0800
+#define IOAT_CHANERR_COMPLETION_ADDR_ERR        0x1000
+#define IOAT_CHANERR_INT_CONFIGURATION_ERR      0x2000
+#define IOAT_CHANERR_SOFT_ERR                   0x4000
+
+#define IOAT_CHANERR_MASK_OFFSET                0x2C    /* 32-bit Channel Error Register */
+
+#endif /* _IOAT_REGISTERS_H_ */