IB/ehca: Add driver for IBM eHCA InfiniBand adapters

Add a driver for IBM GX bus InfiniBand adapters, which are usable with
some pSeries/System p systems.

Signed-off-by: Heiko J Schick <schickhj.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 172 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_tools.h b/drivers/infiniband/hw/ehca/ehca_tools.h
new file mode 100644
index 000000000000..9f56bb846d93
--- /dev/null
+++ b/drivers/infiniband/hw/ehca/ehca_tools.h
@@ -0,0 +1,172 @@
+/*
+ *  IBM eServer eHCA Infiniband device driver for Linux on POWER
+ *
+ *  auxiliary functions
+ *
+ *  Authors: Christoph Raisch <raisch@de.ibm.com>
+ *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
+ *           Khadija Souissi <souissik@de.ibm.com>
+ *           Waleri Fomin <fomin@de.ibm.com>
+ *           Heiko J Schick <schickhj@de.ibm.com>
+ *
+ *  Copyright (c) 2005 IBM Corporation
+ *
+ *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
+ *  BSD.
+ *
+ * OpenIB BSD License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * 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.
+ *
+ * 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 THE COPYRIGHT OWNER 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.
+ */
+
+
+#ifndef EHCA_TOOLS_H
+#define EHCA_TOOLS_H
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/idr.h>
+#include <linux/kthread.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/vmalloc.h>
+#include <linux/version.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/device.h>
+
+#include <asm/abs_addr.h>
+#include <asm/ibmebus.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+
+extern int ehca_debug_level;
+
+#define ehca_dbg(ib_dev, format, arg...) \
+	do { \
+		if (unlikely(ehca_debug_level)) \
+			dev_printk(KERN_DEBUG, (ib_dev)->dma_device, \
+				   "PU%04x EHCA_DBG:%s " format "\n", \
+				   get_paca()->paca_index, __FUNCTION__, \
+				   ## arg); \
+	} while (0)
+
+#define ehca_info(ib_dev, format, arg...) \
+	dev_info((ib_dev)->dma_device, "PU%04x EHCA_INFO:%s " format "\n", \
+		 get_paca()->paca_index, __FUNCTION__, ## arg)
+
+#define ehca_warn(ib_dev, format, arg...) \
+	dev_warn((ib_dev)->dma_device, "PU%04x EHCA_WARN:%s " format "\n", \
+		 get_paca()->paca_index, __FUNCTION__, ## arg)
+
+#define ehca_err(ib_dev, format, arg...) \
+	dev_err((ib_dev)->dma_device, "PU%04x EHCA_ERR:%s " format "\n", \
+		get_paca()->paca_index, __FUNCTION__, ## arg)
+
+/* use this one only if no ib_dev available */
+#define ehca_gen_dbg(format, arg...) \
+	do { \
+		if (unlikely(ehca_debug_level)) \
+			printk(KERN_DEBUG "PU%04x EHCA_DBG:%s " format "\n",\
+			       get_paca()->paca_index, __FUNCTION__, ## arg); \
+	} while (0)
+
+#define ehca_gen_warn(format, arg...) \
+	do { \
+		if (unlikely(ehca_debug_level)) \
+			printk(KERN_INFO "PU%04x EHCA_WARN:%s " format "\n",\
+			       get_paca()->paca_index, __FUNCTION__, ## arg); \
+	} while (0)
+
+#define ehca_gen_err(format, arg...) \
+	printk(KERN_ERR "PU%04x EHCA_ERR:%s " format "\n", \
+		get_paca()->paca_index, __FUNCTION__, ## arg)
+
+/**
+ * ehca_dmp - printk a memory block, whose length is n*8 bytes.
+ * Each line has the following layout:
+ * <format string> adr=X ofs=Y <8 bytes hex> <8 bytes hex>
+ */
+#define ehca_dmp(adr, len, format, args...) \
+	do {				       \
+		unsigned int x;			      \
+		unsigned int l = (unsigned int)(len); \
+		unsigned char *deb = (unsigned char*)(adr);	\
+		for (x = 0; x < l; x += 16) { \
+			printk("EHCA_DMP:%s" format \
+			       " adr=%p ofs=%04x %016lx %016lx\n", \
+			       __FUNCTION__, ##args, deb, x, \
+			       *((u64 *)&deb[0]), *((u64 *)&deb[8])); \
+			deb += 16; \
+		} \
+	} while (0)
+
+/* define a bitmask, little endian version */
+#define EHCA_BMASK(pos,length) (((pos)<<16)+(length))
+
+/* define a bitmask, the ibm way... */
+#define EHCA_BMASK_IBM(from,to) (((63-to)<<16)+((to)-(from)+1))
+
+/* internal function, don't use */
+#define EHCA_BMASK_SHIFTPOS(mask) (((mask)>>16)&0xffff)
+
+/* internal function, don't use */
+#define EHCA_BMASK_MASK(mask) (0xffffffffffffffffULL >> ((64-(mask))&0xffff))
+
+/**
+ * EHCA_BMASK_SET - return value shifted and masked by mask
+ * variable|=EHCA_BMASK_SET(MY_MASK,0x4711) ORs the bits in variable
+ * variable&=~EHCA_BMASK_SET(MY_MASK,-1) clears the bits from the mask
+ * in variable
+ */
+#define EHCA_BMASK_SET(mask,value) \
+	((EHCA_BMASK_MASK(mask) & ((u64)(value)))<<EHCA_BMASK_SHIFTPOS(mask))
+
+/**
+ * EHCA_BMASK_GET - extract a parameter from value by mask
+ */
+#define EHCA_BMASK_GET(mask,value) \
+	(EHCA_BMASK_MASK(mask)& (((u64)(value))>>EHCA_BMASK_SHIFTPOS(mask)))
+
+
+/* Converts ehca to ib return code */
+static inline int ehca2ib_return_code(u64 ehca_rc)
+{
+	switch (ehca_rc) {
+	case H_SUCCESS:
+		return 0;
+	case H_BUSY:
+		return -EBUSY;
+	case H_NO_MEM:
+		return -ENOMEM;
+	default:
+		return -EINVAL;
+	}
+}
+
+
+#endif /* EHCA_TOOLS_H */