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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/scsi/lpfc/lpfc_compat.h
Initial import
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_compat.h')
-rw-r--r--drivers/scsi/lpfc/lpfc_compat.h96
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_compat.h b/drivers/scsi/lpfc/lpfc_compat.h
new file mode 100644
index 000000000..c88e556ea
--- /dev/null
+++ b/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 */