Added missing tegra files.HEADmaster

1 files changed, 122 insertions, 0 deletions

diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
new file mode 100644
index 00000000000..e0edb40ca7a
--- /dev/null
+++ b/include/linux/virtio_blk.h
@@ -0,0 +1,122 @@
+#ifndef _LINUX_VIRTIO_BLK_H
+#define _LINUX_VIRTIO_BLK_H
+/* This header is BSD licensed so anyone can use the definitions to implement
+ * compatible drivers/servers.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of IBM nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE. */
+#include <linux/types.h>
+#include <linux/virtio_ids.h>
+#include <linux/virtio_config.h>
+
+/* Feature bits */
+#define VIRTIO_BLK_F_BARRIER    0       /* Does host support barriers? */
+#define VIRTIO_BLK_F_SIZE_MAX   1       /* Indicates maximum segment size */
+#define VIRTIO_BLK_F_SEG_MAX    2       /* Indicates maximum # of segments */
+#define VIRTIO_BLK_F_GEOMETRY   4       /* Legacy geometry available  */
+#define VIRTIO_BLK_F_RO         5       /* Disk is read-only */
+#define VIRTIO_BLK_F_BLK_SIZE   6       /* Block size of disk is available*/
+#define VIRTIO_BLK_F_SCSI       7       /* Supports scsi command passthru */
+#define VIRTIO_BLK_F_FLUSH      9       /* Cache flush command support */
+#define VIRTIO_BLK_F_TOPOLOGY   10      /* Topology information is available */
+
+#define VIRTIO_BLK_ID_BYTES     20      /* ID string length */
+
+struct virtio_blk_config {
+        /* The capacity (in 512-byte sectors). */
+        __u64 capacity;
+        /* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */
+        __u32 size_max;
+        /* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
+        __u32 seg_max;
+        /* geometry the device (if VIRTIO_BLK_F_GEOMETRY) */
+        struct virtio_blk_geometry {
+                __u16 cylinders;
+                __u8 heads;
+                __u8 sectors;
+        } geometry;
+
+        /* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */
+        __u32 blk_size;
+
+        /* the next 4 entries are guarded by VIRTIO_BLK_F_TOPOLOGY  */
+        /* exponent for physical block per logical block. */
+        __u8 physical_block_exp;
+        /* alignment offset in logical blocks. */
+        __u8 alignment_offset;
+        /* minimum I/O size without performance penalty in logical blocks. */
+        __u16 min_io_size;
+        /* optimal sustained I/O size in logical blocks. */
+        __u32 opt_io_size;
+
+} __attribute__((packed));
+
+/*
+ * Command types
+ *
+ * Usage is a bit tricky as some bits are used as flags and some are not.
+ *
+ * Rules:
+ *   VIRTIO_BLK_T_OUT may be combined with VIRTIO_BLK_T_SCSI_CMD or
+ *   VIRTIO_BLK_T_BARRIER.  VIRTIO_BLK_T_FLUSH is a command of its own
+ *   and may not be combined with any of the other flags.
+ */
+
+/* These two define direction. */
+#define VIRTIO_BLK_T_IN         0
+#define VIRTIO_BLK_T_OUT        1
+
+/* This bit says it's a scsi command, not an actual read or write. */
+#define VIRTIO_BLK_T_SCSI_CMD   2
+
+/* Cache flush command */
+#define VIRTIO_BLK_T_FLUSH      4
+
+/* Get device ID command */
+#define VIRTIO_BLK_T_GET_ID    8
+
+/* Barrier before this op. */
+#define VIRTIO_BLK_T_BARRIER    0x80000000
+
+/* This is the first element of the read scatter-gather list. */
+struct virtio_blk_outhdr {
+        /* VIRTIO_BLK_T* */
+        __u32 type;
+        /* io priority. */
+        __u32 ioprio;
+        /* Sector (ie. 512 byte offset) */
+        __u64 sector;
+};
+
+struct virtio_scsi_inhdr {
+        __u32 errors;
+        __u32 data_len;
+        __u32 sense_len;
+        __u32 residual;
+};
+
+/* And this is the final byte of the write scatter-gather list. */
+#define VIRTIO_BLK_S_OK         0
+#define VIRTIO_BLK_S_IOERR      1
+#define VIRTIO_BLK_S_UNSUPP     2
+#endif /* _LINUX_VIRTIO_BLK_H */