Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / scsi / lpfc / lpfc_compat.h

diff --git a/kernel/drivers/scsi/lpfc/lpfc_compat.h b/kernel/drivers/scsi/lpfc/lpfc_compat.h
new file mode 100644 (file)
index 0000000..c88e556
--- /dev/null
+++ b/kernel/drivers/scsi/lpfc/lpfc_compat.h
@@ -0,0 +1,96 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for         *
+ * Fibre Channel Host Bus Adapters.                                *
+ * Copyright (C) 2004-2011 Emulex.  All rights reserved.           *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.emulex.com                                                  *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ *******************************************************************/
+
+/*
+ * This file provides macros to aid compilation in the Linux 2.4 kernel
+ * over various platform architectures.
+ */
+
+/*******************************************************************
+Note: HBA's SLI memory contains little-endian LW.
+Thus to access it from a little-endian host,
+memcpy_toio() and memcpy_fromio() can be used.
+However on a big-endian host, copy 4 bytes at a time,
+using writel() and readl().
+ *******************************************************************/
+#include <asm/byteorder.h>
+
+#ifdef __BIG_ENDIAN
+
+static inline void
+lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
+{
+       uint32_t __iomem *dest32;
+       uint32_t *src32;
+       unsigned int four_bytes;
+
+
+       dest32  = (uint32_t __iomem *) dest;
+       src32  = (uint32_t *) src;
+
+       /* write input bytes, 4 bytes at a time */
+       for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
+               writel( *src32, dest32);
+               readl(dest32); /* flush */
+               dest32++;
+               src32++;
+       }
+
+       return;
+}
+
+static inline void
+lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
+{
+       uint32_t *dest32;
+       uint32_t __iomem *src32;
+       unsigned int four_bytes;
+
+
+       dest32  = (uint32_t *) dest;
+       src32  = (uint32_t __iomem *) src;
+
+       /* read input bytes, 4 bytes at a time */
+       for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
+               *dest32 = readl( src32);
+               dest32++;
+               src32++;
+       }
+
+       return;
+}
+
+#else
+
+static inline void
+lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
+{
+       /* convert bytes in argument list to word count for copy function */
+       __iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
+}
+
+static inline void
+lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
+{
+       /* actually returns 1 byte past dest */
+       memcpy_fromio( dest, src, bytes);
+}
+
+#endif /* __BIG_ENDIAN */