Automatic merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6.git

7 files changed, 1770 insertions, 1 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 096a1202ea0..97ac4edf465 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -399,6 +399,20 @@ config SGI_SNSC
 	  controller communication from user space (you want this!),
 	  say Y.  Otherwise, say N.
 
+config SGI_TIOCX
+       bool "SGI TIO CX driver support"
+       depends on (IA64_SGI_SN2 || IA64_GENERIC)
+       help
+         If you have an SGI Altix and you have fpga devices attached
+         to your TIO, say Y here, otherwise say N.
+
+config SGI_MBCS
+       tristate "SGI FPGA Core Services driver support"
+       depends on (IA64_SGI_SN2 || IA64_GENERIC)
+       help
+         If you have an SGI Altix with an attached SABrick
+         say Y or M here, otherwise say N.
+
 source "drivers/serial/Kconfig"
 
 config UNIX98_PTYS
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 54ed76af1a4..e3f5c32aac5 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -42,11 +42,12 @@ obj-$(CONFIG_SX)		+= sx.o generic_serial.o
 obj-$(CONFIG_RIO)		+= rio/ generic_serial.o
 obj-$(CONFIG_HVC_CONSOLE)	+= hvc_console.o hvsi.o
 obj-$(CONFIG_RAW_DRIVER)	+= raw.o
-obj-$(CONFIG_SGI_SNSC)		+= snsc.o
+obj-$(CONFIG_SGI_SNSC)		+= snsc.o snsc_event.o
 obj-$(CONFIG_MMTIMER)		+= mmtimer.o
 obj-$(CONFIG_VIOCONS) += viocons.o
 obj-$(CONFIG_VIOTAPE)		+= viotape.o
 obj-$(CONFIG_HVCS)		+= hvcs.o
+obj-$(CONFIG_SGI_MBCS)		+= mbcs.o
 
 obj-$(CONFIG_PRINTER) += lp.o
 obj-$(CONFIG_TIPAR) += tipar.o
diff --git a/drivers/char/mbcs.c b/drivers/char/mbcs.c
new file mode 100644
index 00000000000..ec7100556c5
--- /dev/null
+++ b/drivers/char/mbcs.c
@@ -0,0 +1,849 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2005 Silicon Graphics, Inc.  All rights reserved.
+ */
+
+/*
+ *	MOATB Core Services driver.
+ */
+
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/uio.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/tiocx.h>
+#include "mbcs.h"
+
+#define MBCS_DEBUG 0
+#if MBCS_DEBUG
+#define DBG(fmt...)    printk(KERN_ALERT fmt)
+#else
+#define DBG(fmt...)
+#endif
+int mbcs_major;
+
+LIST_HEAD(soft_list);
+
+/*
+ * file operations
+ */
+struct file_operations mbcs_ops = {
+	.open = mbcs_open,
+	.llseek = mbcs_sram_llseek,
+	.read = mbcs_sram_read,
+	.write = mbcs_sram_write,
+	.mmap = mbcs_gscr_mmap,
+};
+
+struct mbcs_callback_arg {
+	int minor;
+	struct cx_dev *cx_dev;
+};
+
+static inline void mbcs_getdma_init(struct getdma *gdma)
+{
+	memset(gdma, 0, sizeof(struct getdma));
+	gdma->DoneIntEnable = 1;
+}
+
+static inline void mbcs_putdma_init(struct putdma *pdma)
+{
+	memset(pdma, 0, sizeof(struct putdma));
+	pdma->DoneIntEnable = 1;
+}
+
+static inline void mbcs_algo_init(struct algoblock *algo_soft)
+{
+	memset(algo_soft, 0, sizeof(struct algoblock));
+}
+
+static inline void mbcs_getdma_set(void *mmr,
+		       uint64_t hostAddr,
+		       uint64_t localAddr,
+		       uint64_t localRamSel,
+		       uint64_t numPkts,
+		       uint64_t amoEnable,
+		       uint64_t intrEnable,
+		       uint64_t peerIO,
+		       uint64_t amoHostDest,
+		       uint64_t amoModType, uint64_t intrHostDest,
+		       uint64_t intrVector)
+{
+	union dma_control rdma_control;
+	union dma_amo_dest amo_dest;
+	union intr_dest intr_dest;
+	union dma_localaddr local_addr;
+	union dma_hostaddr host_addr;
+
+	rdma_control.dma_control_reg = 0;
+	amo_dest.dma_amo_dest_reg = 0;
+	intr_dest.intr_dest_reg = 0;
+	local_addr.dma_localaddr_reg = 0;
+	host_addr.dma_hostaddr_reg = 0;
+
+	host_addr.dma_sys_addr = hostAddr;
+	MBCS_MMR_SET(mmr, MBCS_RD_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
+
+	local_addr.dma_ram_addr = localAddr;
+	local_addr.dma_ram_sel = localRamSel;
+	MBCS_MMR_SET(mmr, MBCS_RD_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
+
+	rdma_control.dma_op_length = numPkts;
+	rdma_control.done_amo_en = amoEnable;
+	rdma_control.done_int_en = intrEnable;
+	rdma_control.pio_mem_n = peerIO;
+	MBCS_MMR_SET(mmr, MBCS_RD_DMA_CTRL, rdma_control.dma_control_reg);
+
+	amo_dest.dma_amo_sys_addr = amoHostDest;
+	amo_dest.dma_amo_mod_type = amoModType;
+	MBCS_MMR_SET(mmr, MBCS_RD_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
+
+	intr_dest.address = intrHostDest;
+	intr_dest.int_vector = intrVector;
+	MBCS_MMR_SET(mmr, MBCS_RD_DMA_INT_DEST, intr_dest.intr_dest_reg);
+
+}
+
+static inline void mbcs_putdma_set(void *mmr,
+		       uint64_t hostAddr,
+		       uint64_t localAddr,
+		       uint64_t localRamSel,
+		       uint64_t numPkts,
+		       uint64_t amoEnable,
+		       uint64_t intrEnable,
+		       uint64_t peerIO,
+		       uint64_t amoHostDest,
+		       uint64_t amoModType,
+		       uint64_t intrHostDest, uint64_t intrVector)
+{
+	union dma_control wdma_control;
+	union dma_amo_dest amo_dest;
+	union intr_dest intr_dest;
+	union dma_localaddr local_addr;
+	union dma_hostaddr host_addr;
+
+	wdma_control.dma_control_reg = 0;
+	amo_dest.dma_amo_dest_reg = 0;
+	intr_dest.intr_dest_reg = 0;
+	local_addr.dma_localaddr_reg = 0;
+	host_addr.dma_hostaddr_reg = 0;
+
+	host_addr.dma_sys_addr = hostAddr;
+	MBCS_MMR_SET(mmr, MBCS_WR_DMA_SYS_ADDR, host_addr.dma_hostaddr_reg);
+
+	local_addr.dma_ram_addr = localAddr;
+	local_addr.dma_ram_sel = localRamSel;
+	MBCS_MMR_SET(mmr, MBCS_WR_DMA_LOC_ADDR, local_addr.dma_localaddr_reg);
+
+	wdma_control.dma_op_length = numPkts;
+	wdma_control.done_amo_en = amoEnable;
+	wdma_control.done_int_en = intrEnable;
+	wdma_control.pio_mem_n = peerIO;
+	MBCS_MMR_SET(mmr, MBCS_WR_DMA_CTRL, wdma_control.dma_control_reg);
+
+	amo_dest.dma_amo_sys_addr = amoHostDest;
+	amo_dest.dma_amo_mod_type = amoModType;
+	MBCS_MMR_SET(mmr, MBCS_WR_DMA_AMO_DEST, amo_dest.dma_amo_dest_reg);
+
+	intr_dest.address = intrHostDest;
+	intr_dest.int_vector = intrVector;
+	MBCS_MMR_SET(mmr, MBCS_WR_DMA_INT_DEST, intr_dest.intr_dest_reg);
+
+}
+
+static inline void mbcs_algo_set(void *mmr,
+		     uint64_t amoHostDest,
+		     uint64_t amoModType,
+		     uint64_t intrHostDest,
+		     uint64_t intrVector, uint64_t algoStepCount)
+{
+	union dma_amo_dest amo_dest;
+	union intr_dest intr_dest;
+	union algo_step step;
+
+	step.algo_step_reg = 0;
+	intr_dest.intr_dest_reg = 0;
+	amo_dest.dma_amo_dest_reg = 0;
+
+	amo_dest.dma_amo_sys_addr = amoHostDest;
+	amo_dest.dma_amo_mod_type = amoModType;
+	MBCS_MMR_SET(mmr, MBCS_ALG_AMO_DEST, amo_dest.dma_amo_dest_reg);
+
+	intr_dest.address = intrHostDest;
+	intr_dest.int_vector = intrVector;
+	MBCS_MMR_SET(mmr, MBCS_ALG_INT_DEST, intr_dest.intr_dest_reg);
+
+	step.alg_step_cnt = algoStepCount;
+	MBCS_MMR_SET(mmr, MBCS_ALG_STEP, step.algo_step_reg);
+}
+
+static inline int mbcs_getdma_start(struct mbcs_soft *soft)
+{
+	void *mmr_base;
+	struct getdma *gdma;
+	uint64_t numPkts;
+	union cm_control cm_control;
+
+	mmr_base = soft->mmr_base;
+	gdma = &soft->getdma;
+
+	/* check that host address got setup */
+	if (!gdma->hostAddr)
+		return -1;
+
+	numPkts =
+	    (gdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
+
+	/* program engine */
+	mbcs_getdma_set(mmr_base, tiocx_dma_addr(gdma->hostAddr),
+		   gdma->localAddr,
+		   (gdma->localAddr < MB2) ? 0 :
+		   (gdma->localAddr < MB4) ? 1 :
+		   (gdma->localAddr < MB6) ? 2 : 3,
+		   numPkts,
+		   gdma->DoneAmoEnable,
+		   gdma->DoneIntEnable,
+		   gdma->peerIO,
+		   gdma->amoHostDest,
+		   gdma->amoModType,
+		   gdma->intrHostDest, gdma->intrVector);
+
+	/* start engine */
+	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
+	cm_control.rd_dma_go = 1;
+	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
+
+	return 0;
+
+}
+
+static inline int mbcs_putdma_start(struct mbcs_soft *soft)
+{
+	void *mmr_base;
+	struct putdma *pdma;
+	uint64_t numPkts;
+	union cm_control cm_control;
+
+	mmr_base = soft->mmr_base;
+	pdma = &soft->putdma;
+
+	/* check that host address got setup */
+	if (!pdma->hostAddr)
+		return -1;
+
+	numPkts =
+	    (pdma->bytes + (MBCS_CACHELINE_SIZE - 1)) / MBCS_CACHELINE_SIZE;
+
+	/* program engine */
+	mbcs_putdma_set(mmr_base, tiocx_dma_addr(pdma->hostAddr),
+		   pdma->localAddr,
+		   (pdma->localAddr < MB2) ? 0 :
+		   (pdma->localAddr < MB4) ? 1 :
+		   (pdma->localAddr < MB6) ? 2 : 3,
+		   numPkts,
+		   pdma->DoneAmoEnable,
+		   pdma->DoneIntEnable,
+		   pdma->peerIO,
+		   pdma->amoHostDest,
+		   pdma->amoModType,
+		   pdma->intrHostDest, pdma->intrVector);
+
+	/* start engine */
+	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
+	cm_control.wr_dma_go = 1;
+	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
+
+	return 0;
+
+}
+
+static inline int mbcs_algo_start(struct mbcs_soft *soft)
+{
+	struct algoblock *algo_soft = &soft->algo;
+	void *mmr_base = soft->mmr_base;
+	union cm_control cm_control;
+
+	if (down_interruptible(&soft->algolock))
+		return -ERESTARTSYS;
+
+	atomic_set(&soft->algo_done, 0);
+
+	mbcs_algo_set(mmr_base,
+		 algo_soft->amoHostDest,
+		 algo_soft->amoModType,
+		 algo_soft->intrHostDest,
+		 algo_soft->intrVector, algo_soft->algoStepCount);
+
+	/* start algorithm */
+	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
+	cm_control.alg_done_int_en = 1;
+	cm_control.alg_go = 1;
+	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
+
+	up(&soft->algolock);
+
+	return 0;
+}
+
+static inline ssize_t
+do_mbcs_sram_dmawrite(struct mbcs_soft *soft, uint64_t hostAddr,
+		      size_t len, loff_t * off)
+{
+	int rv = 0;
+
+	if (down_interruptible(&soft->dmawritelock))
+		return -ERESTARTSYS;
+
+	atomic_set(&soft->dmawrite_done, 0);
+
+	soft->putdma.hostAddr = hostAddr;
+	soft->putdma.localAddr = *off;
+	soft->putdma.bytes = len;
+
+	if (mbcs_putdma_start(soft) < 0) {
+		DBG(KERN_ALERT "do_mbcs_sram_dmawrite: "
+					"mbcs_putdma_start failed\n");
+		rv = -EAGAIN;
+		goto dmawrite_exit;
+	}
+
+	if (wait_event_interruptible(soft->dmawrite_queue,
+					atomic_read(&soft->dmawrite_done))) {
+		rv = -ERESTARTSYS;
+		goto dmawrite_exit;
+	}
+
+	rv = len;
+	*off += len;
+
+dmawrite_exit:
+	up(&soft->dmawritelock);
+
+	return rv;
+}
+
+static inline ssize_t
+do_mbcs_sram_dmaread(struct mbcs_soft *soft, uint64_t hostAddr,
+		     size_t len, loff_t * off)
+{
+	int rv = 0;
+
+	if (down_interruptible(&soft->dmareadlock))
+		return -ERESTARTSYS;
+
+	atomic_set(&soft->dmawrite_done, 0);
+
+	soft->getdma.hostAddr = hostAddr;
+	soft->getdma.localAddr = *off;
+	soft->getdma.bytes = len;
+
+	if (mbcs_getdma_start(soft) < 0) {
+		DBG(KERN_ALERT "mbcs_strategy: mbcs_getdma_start failed\n");
+		rv = -EAGAIN;
+		goto dmaread_exit;
+	}
+
+	if (wait_event_interruptible(soft->dmaread_queue,
+					atomic_read(&soft->dmaread_done))) {
+		rv = -ERESTARTSYS;
+		goto dmaread_exit;
+	}
+
+	rv = len;
+	*off += len;
+
+dmaread_exit:
+	up(&soft->dmareadlock);
+
+	return rv;
+}
+
+int mbcs_open(struct inode *ip, struct file *fp)
+{
+	struct mbcs_soft *soft;
+	int minor;
+
+	minor = iminor(ip);
+
+	list_for_each_entry(soft, &soft_list, list) {
+		if (soft->nasid == minor) {
+			fp->private_data = soft->cxdev;
+			return 0;
+		}
+	}
+
+	return -ENODEV;
+}
+
+ssize_t mbcs_sram_read(struct file * fp, char *buf, size_t len, loff_t * off)
+{
+	struct cx_dev *cx_dev = fp->private_data;
+	struct mbcs_soft *soft = cx_dev->soft;
+	uint64_t hostAddr;
+	int rv = 0;
+
+	hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
+	if (hostAddr == 0)
+		return -ENOMEM;
+
+	rv = do_mbcs_sram_dmawrite(soft, hostAddr, len, off);
+	if (rv < 0)
+		goto exit;
+
+	if (copy_to_user(buf, (void *)hostAddr, len))
+		rv = -EFAULT;
+
+      exit:
+	free_pages(hostAddr, get_order(len));
+
+	return rv;
+}
+
+ssize_t
+mbcs_sram_write(struct file * fp, const char *buf, size_t len, loff_t * off)
+{
+	struct cx_dev *cx_dev = fp->private_data;
+	struct mbcs_soft *soft = cx_dev->soft;
+	uint64_t hostAddr;
+	int rv = 0;
+
+	hostAddr = __get_dma_pages(GFP_KERNEL, get_order(len));
+	if (hostAddr == 0)
+		return -ENOMEM;
+
+	if (copy_from_user((void *)hostAddr, buf, len)) {
+		rv = -EFAULT;
+		goto exit;
+	}
+
+	rv = do_mbcs_sram_dmaread(soft, hostAddr, len, off);
+
+      exit:
+	free_pages(hostAddr, get_order(len));
+
+	return rv;
+}
+
+loff_t mbcs_sram_llseek(struct file * filp, loff_t off, int whence)
+{
+	loff_t newpos;
+
+	switch (whence) {
+	case 0:		/* SEEK_SET */
+		newpos = off;
+		break;
+
+	case 1:		/* SEEK_CUR */
+		newpos = filp->f_pos + off;
+		break;
+
+	case 2:		/* SEEK_END */
+		newpos = MBCS_SRAM_SIZE + off;
+		break;
+
+	default:		/* can't happen */
+		return -EINVAL;
+	}
+
+	if (newpos < 0)
+		return -EINVAL;
+
+	filp->f_pos = newpos;
+
+	return newpos;
+}
+
+static uint64_t mbcs_pioaddr(struct mbcs_soft *soft, uint64_t offset)
+{
+	uint64_t mmr_base;
+
+	mmr_base = (uint64_t) (soft->mmr_base + offset);
+
+	return mmr_base;
+}
+
+static void mbcs_debug_pioaddr_set(struct mbcs_soft *soft)
+{
+	soft->debug_addr = mbcs_pioaddr(soft, MBCS_DEBUG_START);
+}
+
+static void mbcs_gscr_pioaddr_set(struct mbcs_soft *soft)
+{
+	soft->gscr_addr = mbcs_pioaddr(soft, MBCS_GSCR_START);
+}
+
+int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma)
+{
+	struct cx_dev *cx_dev = fp->private_data;
+	struct mbcs_soft *soft = cx_dev->soft;
+
+	if (vma->vm_pgoff != 0)
+		return -EINVAL;
+
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+	/* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */
+	if (remap_pfn_range(vma,
+			    vma->vm_start,
+			    __pa(soft->gscr_addr) >> PAGE_SHIFT,
+			    PAGE_SIZE,
+			    vma->vm_page_prot))
+		return -EAGAIN;
+
+	return 0;
+}
+
+/**
+ * mbcs_completion_intr_handler - Primary completion handler.
+ * @irq: irq
+ * @arg: soft struct for device
+ * @ep: regs
+ *
+ */
+static irqreturn_t
+mbcs_completion_intr_handler(int irq, void *arg, struct pt_regs *ep)
+{
+	struct mbcs_soft *soft = (struct mbcs_soft *)arg;
+	void *mmr_base;
+	union cm_status cm_status;
+	union cm_control cm_control;
+
+	mmr_base = soft->mmr_base;
+	cm_status.cm_status_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_STATUS);
+
+	if (cm_status.rd_dma_done) {
+		/* stop dma-read engine, clear status */
+		cm_control.cm_control_reg =
+		    MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
+		cm_control.rd_dma_clr = 1;
+		MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
+			     cm_control.cm_control_reg);
+		atomic_set(&soft->dmaread_done, 1);
+		wake_up(&soft->dmaread_queue);
+	}
+	if (cm_status.wr_dma_done) {
+		/* stop dma-write engine, clear status */
+		cm_control.cm_control_reg =
+		    MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
+		cm_control.wr_dma_clr = 1;
+		MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
+			     cm_control.cm_control_reg);
+		atomic_set(&soft->dmawrite_done, 1);
+		wake_up(&soft->dmawrite_queue);
+	}
+	if (cm_status.alg_done) {
+		/* clear status */
+		cm_control.cm_control_reg =
+		    MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
+		cm_control.alg_done_clr = 1;
+		MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL,
+			     cm_control.cm_control_reg);
+		atomic_set(&soft->algo_done, 1);
+		wake_up(&soft->algo_queue);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * mbcs_intr_alloc - Allocate interrupts.
+ * @dev: device pointer
+ *
+ */
+static int mbcs_intr_alloc(struct cx_dev *dev)
+{
+	struct sn_irq_info *sn_irq;
+	struct mbcs_soft *soft;
+	struct getdma *getdma;
+	struct putdma *putdma;
+	struct algoblock *algo;
+
+	soft = dev->soft;
+	getdma = &soft->getdma;
+	putdma = &soft->putdma;
+	algo = &soft->algo;
+
+	soft->get_sn_irq = NULL;
+	soft->put_sn_irq = NULL;
+	soft->algo_sn_irq = NULL;
+
+	sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
+	if (sn_irq == NULL)
+		return -EAGAIN;
+	soft->get_sn_irq = sn_irq;
+	getdma->intrHostDest = sn_irq->irq_xtalkaddr;
+	getdma->intrVector = sn_irq->irq_irq;
+	if (request_irq(sn_irq->irq_irq,
+			(void *)mbcs_completion_intr_handler, SA_SHIRQ,
+			"MBCS get intr", (void *)soft)) {
+		tiocx_irq_free(soft->get_sn_irq);
+		return -EAGAIN;
+	}
+
+	sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
+	if (sn_irq == NULL) {
+		free_irq(soft->get_sn_irq->irq_irq, soft);
+		tiocx_irq_free(soft->get_sn_irq);
+		return -EAGAIN;
+	}
+	soft->put_sn_irq = sn_irq;
+	putdma->intrHostDest = sn_irq->irq_xtalkaddr;
+	putdma->intrVector = sn_irq->irq_irq;
+	if (request_irq(sn_irq->irq_irq,
+			(void *)mbcs_completion_intr_handler, SA_SHIRQ,
+			"MBCS put intr", (void *)soft)) {
+		tiocx_irq_free(soft->put_sn_irq);
+		free_irq(soft->get_sn_irq->irq_irq, soft);
+		tiocx_irq_free(soft->get_sn_irq);
+		return -EAGAIN;
+	}
+
+	sn_irq = tiocx_irq_alloc(dev->cx_id.nasid, TIOCX_CORELET, -1, -1, -1);
+	if (sn_irq == NULL) {
+		free_irq(soft->put_sn_irq->irq_irq, soft);
+		tiocx_irq_free(soft->put_sn_irq);
+		free_irq(soft->get_sn_irq->irq_irq, soft);
+		tiocx_irq_free(soft->get_sn_irq);
+		return -EAGAIN;
+	}
+	soft->algo_sn_irq = sn_irq;
+	algo->intrHostDest = sn_irq->irq_xtalkaddr;
+	algo->intrVector = sn_irq->irq_irq;
+	if (request_irq(sn_irq->irq_irq,
+			(void *)mbcs_completion_intr_handler, SA_SHIRQ,
+			"MBCS algo intr", (void *)soft)) {
+		tiocx_irq_free(soft->algo_sn_irq);
+		free_irq(soft->put_sn_irq->irq_irq, soft);
+		tiocx_irq_free(soft->put_sn_irq);
+		free_irq(soft->get_sn_irq->irq_irq, soft);
+		tiocx_irq_free(soft->get_sn_irq);
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
+/**
+ * mbcs_intr_dealloc - Remove interrupts.
+ * @dev: device pointer
+ *
+ */
+static void mbcs_intr_dealloc(struct cx_dev *dev)
+{
+	struct mbcs_soft *soft;
+
+	soft = dev->soft;
+
+	free_irq(soft->get_sn_irq->irq_irq, soft);
+	tiocx_irq_free(soft->get_sn_irq);
+	free_irq(soft->put_sn_irq->irq_irq, soft);
+	tiocx_irq_free(soft->put_sn_irq);
+	free_irq(soft->algo_sn_irq->irq_irq, soft);
+	tiocx_irq_free(soft->algo_sn_irq);
+}
+
+static inline int mbcs_hw_init(struct mbcs_soft *soft)
+{
+	void *mmr_base = soft->mmr_base;
+	union cm_control cm_control;
+	union cm_req_timeout cm_req_timeout;
+	uint64_t err_stat;
+
+	cm_req_timeout.cm_req_timeout_reg =
+	    MBCS_MMR_GET(mmr_base, MBCS_CM_REQ_TOUT);
+
+	cm_req_timeout.time_out = MBCS_CM_CONTROL_REQ_TOUT_MASK;
+	MBCS_MMR_SET(mmr_base, MBCS_CM_REQ_TOUT,
+		     cm_req_timeout.cm_req_timeout_reg);
+
+	mbcs_gscr_pioaddr_set(soft);
+	mbcs_debug_pioaddr_set(soft);
+
+	/* clear errors */
+	err_stat = MBCS_MMR_GET(mmr_base, MBCS_CM_ERR_STAT);
+	MBCS_MMR_SET(mmr_base, MBCS_CM_CLR_ERR_STAT, err_stat);
+	MBCS_MMR_ZERO(mmr_base, MBCS_CM_ERROR_DETAIL1);
+
+	/* enable interrupts */
+	/* turn off 2^23 (INT_EN_PIO_REQ_ADDR_INV) */
+	MBCS_MMR_SET(mmr_base, MBCS_CM_ERR_INT_EN, 0x3ffffff7e00ffUL);
+
+	/* arm status regs and clear engines */
+	cm_control.cm_control_reg = MBCS_MMR_GET(mmr_base, MBCS_CM_CONTROL);
+	cm_control.rearm_stat_regs = 1;
+	cm_control.alg_clr = 1;
+	cm_control.wr_dma_clr = 1;
+	cm_control.rd_dma_clr = 1;
+
+	MBCS_MMR_SET(mmr_base, MBCS_CM_CONTROL, cm_control.cm_control_reg);
+
+	return 0;
+}
+
+static ssize_t show_algo(struct device *dev, char *buf)
+{
+	struct cx_dev *cx_dev = to_cx_dev(dev);
+	struct mbcs_soft *soft = cx_dev->soft;
+	uint64_t debug0;
+
+	/*
+	 * By convention, the first debug register contains the
+	 * algorithm number and revision.
+	 */
+	debug0 = *(uint64_t *) soft->debug_addr;
+
+	return sprintf(buf, "0x%lx 0x%lx\n",
+		       (debug0 >> 32), (debug0 & 0xffffffff));
+}
+
+static ssize_t store_algo(struct device *dev, const char *buf, size_t count)
+{
+	int n;
+	struct cx_dev *cx_dev = to_cx_dev(dev);
+	struct mbcs_soft *soft = cx_dev->soft;
+
+	if (count <= 0)
+		return 0;
+
+	n = simple_strtoul(buf, NULL, 0);
+
+	if (n == 1) {
+		mbcs_algo_start(soft);
+		if (wait_event_interruptible(soft->algo_queue,
+					atomic_read(&soft->algo_done)))
+			return -ERESTARTSYS;
+	}
+
+	return count;
+}
+
+DEVICE_ATTR(algo, 0644, show_algo, store_algo);
+
+/**
+ * mbcs_probe - Initialize for device
+ * @dev: device pointer
+ * @device_id: id table pointer
+ *
+ */
+static int mbcs_probe(struct cx_dev *dev, const struct cx_device_id *id)
+{
+	struct mbcs_soft *soft;
+
+	dev->soft = NULL;
+
+	soft = kcalloc(1, sizeof(struct mbcs_soft), GFP_KERNEL);
+	if (soft == NULL)
+		return -ENOMEM;
+
+	soft->nasid = dev->cx_id.nasid;
+	list_add(&soft->list, &soft_list);
+	soft->mmr_base = (void *)tiocx_swin_base(dev->cx_id.nasid);
+	dev->soft = soft;
+	soft->cxdev = dev;
+
+	init_waitqueue_head(&soft->dmawrite_queue);
+	init_waitqueue_head(&soft->dmaread_queue);
+	init_waitqueue_head(&soft->algo_queue);
+
+	init_MUTEX(&soft->dmawritelock);
+	init_MUTEX(&soft->dmareadlock);
+	init_MUTEX(&soft->algolock);
+
+	mbcs_getdma_init(&soft->getdma);
+	mbcs_putdma_init(&soft->putdma);
+	mbcs_algo_init(&soft->algo);
+
+	mbcs_hw_init(soft);
+
+	/* Allocate interrupts */
+	mbcs_intr_alloc(dev);
+
+	device_create_file(&dev->dev, &dev_attr_algo);
+
+	return 0;
+}
+
+static int mbcs_remove(struct cx_dev *dev)
+{
+	if (dev->soft) {
+		mbcs_intr_dealloc(dev);
+		kfree(dev->soft);
+	}
+
+	device_remove_file(&dev->dev, &dev_attr_algo);
+
+	return 0;
+}
+
+const struct cx_device_id __devinitdata mbcs_id_table[] = {
+	{
+	 .part_num = MBCS_PART_NUM,
+	 .mfg_num = MBCS_MFG_NUM,
+	 },
+	{
+	 .part_num = MBCS_PART_NUM_ALG0,
+	 .mfg_num = MBCS_MFG_NUM,
+	 },
+	{0, 0}
+};
+
+MODULE_DEVICE_TABLE(cx, mbcs_id_table);
+
+struct cx_drv mbcs_driver = {
+	.name = DEVICE_NAME,
+	.id_table = mbcs_id_table,
+	.probe = mbcs_probe,
+	.remove = mbcs_remove,
+};
+
+static void __exit mbcs_exit(void)
+{
+	int rv;
+
+	rv = unregister_chrdev(mbcs_major, DEVICE_NAME);
+	if (rv < 0)
+		DBG(KERN_ALERT "Error in unregister_chrdev: %d\n", rv);
+
+	cx_driver_unregister(&mbcs_driver);
+}
+
+static int __init mbcs_init(void)
+{
+	int rv;
+
+	// Put driver into chrdevs[].  Get major number.
+	rv = register_chrdev(mbcs_major, DEVICE_NAME, &mbcs_ops);
+	if (rv < 0) {
+		DBG(KERN_ALERT "mbcs_init: can't get major number. %d\n", rv);
+		return rv;
+	}
+	mbcs_major = rv;
+
+	return cx_driver_register(&mbcs_driver);
+}
+
+module_init(mbcs_init);
+module_exit(mbcs_exit);
+
+MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>");
+MODULE_DESCRIPTION("Driver for MOATB Core Services");
+MODULE_LICENSE("GPL");
diff --git a/drivers/char/mbcs.h b/drivers/char/mbcs.h
new file mode 100644
index 00000000000..844644d201c
--- /dev/null
+++ b/drivers/char/mbcs.h
@@ -0,0 +1,553 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2005 Silicon Graphics, Inc.  All rights reserved.
+ */
+
+#ifndef __MBCS_H__
+#define __MBCS_H__
+
+/*
+ * General macros
+ */
+#define MB	(1024*1024)
+#define MB2	(2*MB)
+#define MB4	(4*MB)
+#define MB6	(6*MB)
+
+/*
+ * Offsets and masks
+ */
+#define MBCS_CM_ID		0x0000	/* Identification */
+#define MBCS_CM_STATUS		0x0008	/* Status */
+#define MBCS_CM_ERROR_DETAIL1	0x0010	/* Error Detail1 */
+#define MBCS_CM_ERROR_DETAIL2	0x0018	/* Error Detail2 */
+#define MBCS_CM_CONTROL		0x0020	/* Control */
+#define MBCS_CM_REQ_TOUT	0x0028	/* Request Time-out */
+#define MBCS_CM_ERR_INT_DEST	0x0038	/* Error Interrupt Destination */
+#define MBCS_CM_TARG_FL		0x0050	/* Target Flush */
+#define MBCS_CM_ERR_STAT	0x0060	/* Error Status */
+#define MBCS_CM_CLR_ERR_STAT	0x0068	/* Clear Error Status */
+#define MBCS_CM_ERR_INT_EN	0x0070	/* Error Interrupt Enable */
+#define MBCS_RD_DMA_SYS_ADDR	0x0100	/* Read DMA System Address */
+#define MBCS_RD_DMA_LOC_ADDR	0x0108	/* Read DMA Local Address */
+#define MBCS_RD_DMA_CTRL	0x0110	/* Read DMA Control */
+#define MBCS_RD_DMA_AMO_DEST	0x0118	/* Read DMA AMO Destination */
+#define MBCS_RD_DMA_INT_DEST	0x0120	/* Read DMA Interrupt Destination */
+#define MBCS_RD_DMA_AUX_STAT	0x0130	/* Read DMA Auxillary Status */
+#define MBCS_WR_DMA_SYS_ADDR	0x0200	/* Write DMA System Address */
+#define MBCS_WR_DMA_LOC_ADDR	0x0208	/* Write DMA Local Address */
+#define MBCS_WR_DMA_CTRL	0x0210	/* Write DMA Control */
+#define MBCS_WR_DMA_AMO_DEST	0x0218	/* Write DMA AMO Destination */
+#define MBCS_WR_DMA_INT_DEST	0x0220	/* Write DMA Interrupt Destination */
+#define MBCS_WR_DMA_AUX_STAT	0x0230	/* Write DMA Auxillary Status */
+#define MBCS_ALG_AMO_DEST	0x0300	/* Algorithm AMO Destination */
+#define MBCS_ALG_INT_DEST	0x0308	/* Algorithm Interrupt Destination */
+#define MBCS_ALG_OFFSETS	0x0310
+#define MBCS_ALG_STEP		0x0318	/* Algorithm Step */
+
+#define MBCS_GSCR_START		0x0000000
+#define MBCS_DEBUG_START	0x0100000
+#define MBCS_RAM0_START		0x0200000
+#define MBCS_RAM1_START		0x0400000
+#define MBCS_RAM2_START		0x0600000
+
+#define MBCS_CM_CONTROL_REQ_TOUT_MASK 0x0000000000ffffffUL
+//#define PIO_BASE_ADDR_BASE_OFFSET_MASK 0x00fffffffff00000UL
+
+#define MBCS_SRAM_SIZE		(1024*1024)
+#define MBCS_CACHELINE_SIZE	128
+
+/*
+ * MMR get's and put's
+ */
+#define MBCS_MMR_ADDR(mmr_base, offset)((uint64_t *)(mmr_base + offset))
+#define MBCS_MMR_SET(mmr_base, offset, value) {			\
+	uint64_t *mbcs_mmr_set_u64p, readback;				\
+	mbcs_mmr_set_u64p = (uint64_t *)(mmr_base + offset);	\
+	*mbcs_mmr_set_u64p = value;					\
+	readback = *mbcs_mmr_set_u64p; \
+}
+#define MBCS_MMR_GET(mmr_base, offset) *(uint64_t *)(mmr_base + offset)
+#define MBCS_MMR_ZERO(mmr_base, offset) MBCS_MMR_SET(mmr_base, offset, 0)
+
+/*
+ * MBCS mmr structures
+ */
+union cm_id {
+	uint64_t cm_id_reg;
+	struct {
+		uint64_t always_one:1,	// 0
+		 mfg_id:11,	// 11:1
+		 part_num:16,	// 27:12
+		 bitstream_rev:8,	// 35:28
+		:28;		// 63:36
+	};
+};
+
+union cm_status {
+	uint64_t cm_status_reg;
+	struct {
+		uint64_t pending_reads:8,	// 7:0
+		 pending_writes:8,	// 15:8
+		 ice_rsp_credits:8,	// 23:16
+		 ice_req_credits:8,	// 31:24
+		 cm_req_credits:8,	// 39:32
+		:1,		// 40
+		 rd_dma_in_progress:1,	// 41
+		 rd_dma_done:1,	// 42
+		:1,		// 43
+		 wr_dma_in_progress:1,	// 44
+		 wr_dma_done:1,	// 45
+		 alg_waiting:1,	// 46
+		 alg_pipe_running:1,	// 47
+		 alg_done:1,	// 48
+		:3,		// 51:49
+		 pending_int_reqs:8,	// 59:52
+		:3,		// 62:60
+		 alg_half_speed_sel:1;	// 63
+	};
+};
+
+union cm_error_detail1 {
+	uint64_t cm_error_detail1_reg;
+	struct {
+		uint64_t packet_type:4,	// 3:0
+		 source_id:2,	// 5:4
+		 data_size:2,	// 7:6
+		 tnum:8,	// 15:8
+		 byte_enable:8,	// 23:16
+		 gfx_cred:8,	// 31:24
+		 read_type:2,	// 33:32
+		 pio_or_memory:1,	// 34
+		 head_cw_error:1,	// 35
+		:12,		// 47:36
+		 head_error_bit:1,	// 48
+		 data_error_bit:1,	// 49
+		:13,		// 62:50
+		 valid:1;	// 63
+	};
+};
+
+union cm_error_detail2 {
+	uint64_t cm_error_detail2_reg;
+	struct {
+		uint64_t address:56,	// 55:0
+		:8;		// 63:56
+	};
+};
+
+union cm_control {
+	uint64_t cm_control_reg;
+	struct {
+		uint64_t cm_id:2,	// 1:0
+		:2,		// 3:2
+		 max_trans:5,	// 8:4
+		:3,		// 11:9
+		 address_mode:1,	// 12
+		:7,		// 19:13
+		 credit_limit:8,	// 27:20
+		:5,		// 32:28
+		 rearm_stat_regs:1,	// 33
+		 prescalar_byp:1,	// 34
+		 force_gap_war:1,	// 35
+		 rd_dma_go:1,	// 36
+		 wr_dma_go:1,	// 37
+		 alg_go:1,	// 38
+		 rd_dma_clr:1,	// 39
+		 wr_dma_clr:1,	// 40
+		 alg_clr:1,	// 41
+		:2,		// 43:42
+		 alg_wait_step:1,	// 44
+		 alg_done_amo_en:1,	// 45
+		 alg_done_int_en:1,	// 46
+		:1,		// 47
+		 alg_sram0_locked:1,	// 48
+		 alg_sram1_locked:1,	// 49
+		 alg_sram2_locked:1,	// 50
+		 alg_done_clr:1,	// 51
+		:12;		// 63:52
+	};
+};
+
+union cm_req_timeout {
+	uint64_t cm_req_timeout_reg;
+	struct {
+		uint64_t time_out:24,	// 23:0
+		:40;		// 63:24
+	};
+};
+
+union intr_dest {
+	uint64_t intr_dest_reg;
+	struct {
+		uint64_t address:56,	// 55:0
+		 int_vector:8;	// 63:56
+	};
+};
+
+union cm_error_status {
+	uint64_t cm_error_status_reg;
+	struct {
+		uint64_t ecc_sbe:1,	// 0
+		 ecc_mbe:1,	// 1
+		 unsupported_req:1,	// 2
+		 unexpected_rsp:1,	// 3
+		 bad_length:1,	// 4
+		 bad_datavalid:1,	// 5
+		 buffer_overflow:1,	// 6
+		 request_timeout:1,	// 7
+		:8,		// 15:8
+		 head_inv_data_size:1,	// 16
+		 rsp_pactype_inv:1,	// 17
+		 head_sb_err:1,	// 18
+		 missing_head:1,	// 19
+		 head_inv_rd_type:1,	// 20
+		 head_cmd_err_bit:1,	// 21
+		 req_addr_align_inv:1,	// 22
+		 pio_req_addr_inv:1,	// 23
+		 req_range_dsize_inv:1,	// 24
+		 early_term:1,	// 25
+		 early_tail:1,	// 26
+		 missing_tail:1,	// 27
+		 data_flit_sb_err:1,	// 28
+		 cm2hcm_req_cred_of:1,	// 29
+		 cm2hcm_rsp_cred_of:1,	// 30
+		 rx_bad_didn:1,	// 31
+		 rd_dma_err_rsp:1,	// 32
+		 rd_dma_tnum_tout:1,	// 33
+		 rd_dma_multi_tnum_tou:1,	// 34
+		 wr_dma_err_rsp:1,	// 35
+		 wr_dma_tnum_tout:1,	// 36
+		 wr_dma_multi_tnum_tou:1,	// 37
+		 alg_data_overflow:1,	// 38
+		 alg_data_underflow:1,	// 39
+		 ram0_access_conflict:1,	// 40
+		 ram1_access_conflict:1,	// 41
+		 ram2_access_conflict:1,	// 42
+		 ram0_perr:1,	// 43
+		 ram1_perr:1,	// 44
+		 ram2_perr:1,	// 45
+		 int_gen_rsp_err:1,	// 46
+		 int_gen_tnum_tout:1,	// 47
+		 rd_dma_prog_err:1,	// 48
+		 wr_dma_prog_err:1,	// 49
+		:14;		// 63:50
+	};
+};
+
+union cm_clr_error_status {
+	uint64_t cm_clr_error_status_reg;
+	struct {
+		uint64_t clr_ecc_sbe:1,	// 0
+		 clr_ecc_mbe:1,	// 1
+		 clr_unsupported_req:1,	// 2
+		 clr_unexpected_rsp:1,	// 3
+		 clr_bad_length:1,	// 4
+		 clr_bad_datavalid:1,	// 5
+		 clr_buffer_overflow:1,	// 6
+		 clr_request_timeout:1,	// 7
+		:8,		// 15:8
+		 clr_head_inv_data_siz:1,	// 16
+		 clr_rsp_pactype_inv:1,	// 17
+		 clr_head_sb_err:1,	// 18
+		 clr_missing_head:1,	// 19
+		 clr_head_inv_rd_type:1,	// 20
+		 clr_head_cmd_err_bit:1,	// 21
+		 clr_req_addr_align_in:1,	// 22
+		 clr_pio_req_addr_inv:1,	// 23
+		 clr_req_range_dsize_i:1,	// 24
+		 clr_early_term:1,	// 25
+		 clr_early_tail:1,	// 26
+		 clr_missing_tail:1,	// 27
+		 clr_data_flit_sb_err:1,	// 28
+		 clr_cm2hcm_req_cred_o:1,	// 29
+		 clr_cm2hcm_rsp_cred_o:1,	// 30
+		 clr_rx_bad_didn:1,	// 31
+		 clr_rd_dma_err_rsp:1,	// 32
+		 clr_rd_dma_tnum_tout:1,	// 33
+		 clr_rd_dma_multi_tnum:1,	// 34
+		 clr_wr_dma_err_rsp:1,	// 35
+		 clr_wr_dma_tnum_tout:1,	// 36
+		 clr_wr_dma_multi_tnum:1,	// 37
+		 clr_alg_data_overflow:1,	// 38
+		 clr_alg_data_underflo:1,	// 39
+		 clr_ram0_access_confl:1,	// 40
+		 clr_ram1_access_confl:1,	// 41
+		 clr_ram2_access_confl:1,	// 42
+		 clr_ram0_perr:1,	// 43
+		 clr_ram1_perr:1,	// 44
+		 clr_ram2_perr:1,	// 45
+		 clr_int_gen_rsp_err:1,	// 46
+		 clr_int_gen_tnum_tout:1,	// 47
+		 clr_rd_dma_prog_err:1,	// 48
+		 clr_wr_dma_prog_err:1,	// 49
+		:14;		// 63:50
+	};
+};
+
+union cm_error_intr_enable {
+	uint64_t cm_error_intr_enable_reg;
+	struct {
+		uint64_t int_en_ecc_sbe:1,	// 0
+		 int_en_ecc_mbe:1,	// 1
+		 int_en_unsupported_re:1,	// 2
+		 int_en_unexpected_rsp:1,	// 3
+		 int_en_bad_length:1,	// 4
+		 int_en_bad_datavalid:1,	// 5
+		 int_en_buffer_overflo:1,	// 6
+		 int_en_request_timeou:1,	// 7
+		:8,		// 15:8
+		 int_en_head_inv_data_:1,	// 16
+		 int_en_rsp_pactype_in:1,	// 17
+		 int_en_head_sb_err:1,	// 18
+		 int_en_missing_head:1,	// 19
+		 int_en_head_inv_rd_ty:1,	// 20
+		 int_en_head_cmd_err_b:1,	// 21
+		 int_en_req_addr_align:1,	// 22
+		 int_en_pio_req_addr_i:1,	// 23
+		 int_en_req_range_dsiz:1,	// 24
+		 int_en_early_term:1,	// 25
+		 int_en_early_tail:1,	// 26
+		 int_en_missing_tail:1,	// 27
+		 int_en_data_flit_sb_e:1,	// 28
+		 int_en_cm2hcm_req_cre:1,	// 29
+		 int_en_cm2hcm_rsp_cre:1,	// 30
+		 int_en_rx_bad_didn:1,	// 31
+		 int_en_rd_dma_err_rsp:1,	// 32
+		 int_en_rd_dma_tnum_to:1,	// 33
+		 int_en_rd_dma_multi_t:1,	// 34
+		 int_en_wr_dma_err_rsp:1,	// 35
+		 int_en_wr_dma_tnum_to:1,	// 36
+		 int_en_wr_dma_multi_t:1,	// 37
+		 int_en_alg_data_overf:1,	// 38
+		 int_en_alg_data_under:1,	// 39
+		 int_en_ram0_access_co:1,	// 40
+		 int_en_ram1_access_co:1,	// 41
+		 int_en_ram2_access_co:1,	// 42
+		 int_en_ram0_perr:1,	// 43
+		 int_en_ram1_perr:1,	// 44
+		 int_en_ram2_perr:1,	// 45
+		 int_en_int_gen_rsp_er:1,	// 46
+		 int_en_int_gen_tnum_t:1,	// 47
+		 int_en_rd_dma_prog_er:1,	// 48
+		 int_en_wr_dma_prog_er:1,	// 49
+		:14;		// 63:50
+	};
+};
+
+struct cm_mmr {
+	union cm_id id;
+	union cm_status status;
+	union cm_error_detail1 err_detail1;
+	union cm_error_detail2 err_detail2;
+	union cm_control control;
+	union cm_req_timeout req_timeout;
+	uint64_t reserved1[1];
+	union intr_dest int_dest;
+	uint64_t reserved2[2];
+	uint64_t targ_flush;
+	uint64_t reserved3[1];
+	union cm_error_status err_status;
+	union cm_clr_error_status clr_err_status;
+	union cm_error_intr_enable int_enable;
+};
+
+union dma_hostaddr {
+	uint64_t dma_hostaddr_reg;
+	struct {
+		uint64_t dma_sys_addr:56,	// 55:0
+		:8;		// 63:56
+	};
+};
+
+union dma_localaddr {
+	uint64_t dma_localaddr_reg;
+	struct {
+		uint64_t dma_ram_addr:21,	// 20:0
+		 dma_ram_sel:2,	// 22:21
+		:41;		// 63:23
+	};
+};
+
+union dma_control {
+	uint64_t dma_control_reg;
+	struct {
+		uint64_t dma_op_length:16,	// 15:0
+		:18,		// 33:16
+		 done_amo_en:1,	// 34
+		 done_int_en:1,	// 35
+		:1,		// 36
+		 pio_mem_n:1,	// 37
+		:26;		// 63:38
+	};
+};
+
+union dma_amo_dest {
+	uint64_t dma_amo_dest_reg;
+	struct {
+		uint64_t dma_amo_sys_addr:56,	// 55:0
+		 dma_amo_mod_type:3,	// 58:56
+		:5;		// 63:59
+	};
+};
+
+union rdma_aux_status {
+	uint64_t rdma_aux_status_reg;
+	struct {
+		uint64_t op_num_pacs_left:17,	// 16:0
+		:5,		// 21:17
+		 lrsp_buff_empty:1,	// 22
+		:17,		// 39:23
+		 pending_reqs_left:6,	// 45:40
+		:18;		// 63:46
+	};
+};
+
+struct rdma_mmr {
+	union dma_hostaddr host_addr;
+	union dma_localaddr local_addr;
+	union dma_control control;
+	union dma_amo_dest amo_dest;
+	union intr_dest intr_dest;
+	union rdma_aux_status aux_status;
+};
+
+union wdma_aux_status {
+	uint64_t wdma_aux_status_reg;
+	struct {
+		uint64_t op_num_pacs_left:17,	// 16:0
+		:4,		// 20:17
+		 lreq_buff_empty:1,	// 21
+		:18,		// 39:22
+		 pending_reqs_left:6,	// 45:40
+		:18;		// 63:46
+	};
+};
+
+struct wdma_mmr {
+	union dma_hostaddr host_addr;
+	union dma_localaddr local_addr;
+	union dma_control control;
+	union dma_amo_dest amo_dest;
+	union intr_dest intr_dest;
+	union wdma_aux_status aux_status;
+};
+
+union algo_step {
+	uint64_t algo_step_reg;
+	struct {
+		uint64_t alg_step_cnt:16,	// 15:0
+		:48;		// 63:16
+	};
+};
+
+struct algo_mmr {
+	union dma_amo_dest amo_dest;
+	union intr_dest intr_dest;
+	union {
+		uint64_t algo_offset_reg;
+		struct {
+			uint64_t sram0_offset:7,	// 6:0
+			reserved0:1,	// 7
+			sram1_offset:7,	// 14:8
+			reserved1:1,	// 15
+			sram2_offset:7,	// 22:16
+			reserved2:14;	// 63:23
+		};
+	} sram_offset;
+	union algo_step step;
+};
+
+struct mbcs_mmr {
+	struct cm_mmr cm;
+	uint64_t reserved1[17];
+	struct rdma_mmr rdDma;
+	uint64_t reserved2[25];
+	struct wdma_mmr wrDma;
+	uint64_t reserved3[25];
+	struct algo_mmr algo;
+	uint64_t reserved4[156];
+};
+
+/*
+ * defines
+ */
+#define DEVICE_NAME "mbcs"
+#define MBCS_PART_NUM 0xfff0
+#define MBCS_PART_NUM_ALG0 0xf001
+#define MBCS_MFG_NUM  0x1
+
+struct algoblock {
+	uint64_t amoHostDest;
+	uint64_t amoModType;
+	uint64_t intrHostDest;
+	uint64_t intrVector;
+	uint64_t algoStepCount;
+};
+
+struct getdma {
+	uint64_t hostAddr;
+	uint64_t localAddr;
+	uint64_t bytes;
+	uint64_t DoneAmoEnable;
+	uint64_t DoneIntEnable;
+	uint64_t peerIO;
+	uint64_t amoHostDest;
+	uint64_t amoModType;
+	uint64_t intrHostDest;
+	uint64_t intrVector;
+};
+
+struct putdma {
+	uint64_t hostAddr;
+	uint64_t localAddr;
+	uint64_t bytes;
+	uint64_t DoneAmoEnable;
+	uint64_t DoneIntEnable;
+	uint64_t peerIO;
+	uint64_t amoHostDest;
+	uint64_t amoModType;
+	uint64_t intrHostDest;
+	uint64_t intrVector;
+};
+
+struct mbcs_soft {
+	struct list_head list;
+	struct cx_dev *cxdev;
+	int major;
+	int nasid;
+	void *mmr_base;
+	wait_queue_head_t dmawrite_queue;
+	wait_queue_head_t dmaread_queue;
+	wait_queue_head_t algo_queue;
+	struct sn_irq_info *get_sn_irq;
+	struct sn_irq_info *put_sn_irq;
+	struct sn_irq_info *algo_sn_irq;
+	struct getdma getdma;
+	struct putdma putdma;
+	struct algoblock algo;
+	uint64_t gscr_addr;	// pio addr
+	uint64_t ram0_addr;	// pio addr
+	uint64_t ram1_addr;	// pio addr
+	uint64_t ram2_addr;	// pio addr
+	uint64_t debug_addr;	// pio addr
+	atomic_t dmawrite_done;
+	atomic_t dmaread_done;
+	atomic_t algo_done;
+	struct semaphore dmawritelock;
+	struct semaphore dmareadlock;
+	struct semaphore algolock;
+};
+
+extern int mbcs_open(struct inode *ip, struct file *fp);
+extern ssize_t mbcs_sram_read(struct file *fp, char *buf, size_t len,
+			      loff_t * off);
+extern ssize_t mbcs_sram_write(struct file *fp, const char *buf, size_t len,
+			       loff_t * off);
+extern loff_t mbcs_sram_llseek(struct file *filp, loff_t off, int whence);
+extern int mbcs_gscr_mmap(struct file *fp, struct vm_area_struct *vma);
+
+#endif				// __MBCS_H__
diff --git a/drivers/char/snsc.c b/drivers/char/snsc.c
index ffb9143376b..e3c0b52d943 100644
--- a/drivers/char/snsc.c
+++ b/drivers/char/snsc.c
@@ -374,6 +374,7 @@ scdrv_init(void)
 	void *salbuf;
 	struct class_simple *snsc_class;
 	dev_t first_dev, dev;
+	nasid_t event_nasid = ia64_sn_get_console_nasid();
 
 	if (alloc_chrdev_region(&first_dev, 0, numionodes,
 				SYSCTL_BASENAME) < 0) {
@@ -441,6 +442,13 @@ scdrv_init(void)
 			ia64_sn_irtr_intr_enable(scd->scd_nasid,
 						 0 /*ignored */ ,
 						 SAL_IROUTER_INTR_RECV);
+
+                        /* on the console nasid, prepare to receive
+                         * system controller environmental events
+                         */
+                        if(scd->scd_nasid == event_nasid) {
+                                scdrv_event_init(scd);
+                        }
 	}
 	return 0;
 }
diff --git a/drivers/char/snsc.h b/drivers/char/snsc.h
index c22c6c55e25..a9efc13cc85 100644
--- a/drivers/char/snsc.h
+++ b/drivers/char/snsc.h
@@ -47,4 +47,44 @@ struct sysctl_data_s {
 	nasid_t scd_nasid;	/* Node on which subchannels are opened. */
 };
 
+
+/* argument types */
+#define IR_ARG_INT              0x00    /* 4-byte integer (big-endian)  */
+#define IR_ARG_ASCII            0x01    /* null-terminated ASCII string */
+#define IR_ARG_UNKNOWN          0x80    /* unknown data type.  The low
+                                         * 7 bits will contain the data
+                                         * length.                      */
+#define IR_ARG_UNKNOWN_LENGTH_MASK	0x7f
+
+
+/* system controller event codes */
+#define EV_CLASS_MASK		0xf000ul
+#define EV_SEVERITY_MASK	0x0f00ul
+#define EV_COMPONENT_MASK	0x00fful
+
+#define EV_CLASS_POWER		0x1000ul
+#define EV_CLASS_FAN		0x2000ul
+#define EV_CLASS_TEMP		0x3000ul
+#define EV_CLASS_ENV		0x4000ul
+#define EV_CLASS_TEST_FAULT	0x5000ul
+#define EV_CLASS_TEST_WARNING	0x6000ul
+#define EV_CLASS_PWRD_NOTIFY	0x8000ul
+
+#define EV_SEVERITY_POWER_STABLE	0x0000ul
+#define EV_SEVERITY_POWER_LOW_WARNING	0x0100ul
+#define EV_SEVERITY_POWER_HIGH_WARNING	0x0200ul
+#define EV_SEVERITY_POWER_HIGH_FAULT	0x0300ul
+#define EV_SEVERITY_POWER_LOW_FAULT	0x0400ul
+
+#define EV_SEVERITY_FAN_STABLE		0x0000ul
+#define EV_SEVERITY_FAN_WARNING		0x0100ul
+#define EV_SEVERITY_FAN_FAULT		0x0200ul
+
+#define EV_SEVERITY_TEMP_STABLE		0x0000ul
+#define EV_SEVERITY_TEMP_ADVISORY	0x0100ul
+#define EV_SEVERITY_TEMP_CRITICAL	0x0200ul
+#define EV_SEVERITY_TEMP_FAULT		0x0300ul
+
+void scdrv_event_init(struct sysctl_data_s *);
+
 #endif /* _SN_SYSCTL_H_ */
diff --git a/drivers/char/snsc_event.c b/drivers/char/snsc_event.c
new file mode 100644
index 00000000000..d692af57213
--- /dev/null
+++ b/drivers/char/snsc_event.c
@@ -0,0 +1,304 @@
+/*
+ * SN Platform system controller communication support
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
+ */
+
+/*
+ * System controller event handler
+ *
+ * These routines deal with environmental events arriving from the
+ * system controllers.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/byteorder/generic.h>
+#include <asm/sn/sn_sal.h>
+#include "snsc.h"
+
+static struct subch_data_s *event_sd;
+
+void scdrv_event(unsigned long);
+DECLARE_TASKLET(sn_sysctl_event, scdrv_event, 0);
+
+/*
+ * scdrv_event_interrupt
+ *
+ * Pull incoming environmental events off the physical link to the
+ * system controller and put them in a temporary holding area in SAL.
+ * Schedule scdrv_event() to move them along to their ultimate
+ * destination.
+ */
+static irqreturn_t
+scdrv_event_interrupt(int irq, void *subch_data, struct pt_regs *regs)
+{
+	struct subch_data_s *sd = subch_data;
+	unsigned long flags;
+	int status;
+
+	spin_lock_irqsave(&sd->sd_rlock, flags);
+	status = ia64_sn_irtr_intr(sd->sd_nasid, sd->sd_subch);
+
+	if ((status > 0) && (status & SAL_IROUTER_INTR_RECV)) {
+		tasklet_schedule(&sn_sysctl_event);
+	}
+	spin_unlock_irqrestore(&sd->sd_rlock, flags);
+	return IRQ_HANDLED;
+}
+
+
+/*
+ * scdrv_parse_event
+ *
+ * Break an event (as read from SAL) into useful pieces so we can decide
+ * what to do with it.
+ */
+static int
+scdrv_parse_event(char *event, int *src, int *code, int *esp_code, char *desc)
+{
+	char *desc_end;
+
+	/* record event source address */
+	*src = be32_to_cpup((__be32 *)event);
+	event += 4; 			/* move on to event code */
+
+	/* record the system controller's event code */
+	*code = be32_to_cpup((__be32 *)event);
+	event += 4;			/* move on to event arguments */
+
+	/* how many arguments are in the packet? */
+	if (*event++ != 2) {
+		/* if not 2, give up */
+		return -1;
+	}
+
+	/* parse out the ESP code */
+	if (*event++ != IR_ARG_INT) {
+		/* not an integer argument, so give up */
+		return -1;
+	}
+	*esp_code = be32_to_cpup((__be32 *)event);
+	event += 4;
+
+	/* parse out the event description */
+	if (*event++ != IR_ARG_ASCII) {
+		/* not an ASCII string, so give up */
+		return -1;
+	}
+	event[CHUNKSIZE-1] = '\0';	/* ensure this string ends! */
+	event += 2; 			/* skip leading CR/LF */
+	desc_end = desc + sprintf(desc, "%s", event);
+
+	/* strip trailing CR/LF (if any) */
+	for (desc_end--;
+	     (desc_end != desc) && ((*desc_end == 0xd) || (*desc_end == 0xa));
+	     desc_end--) {
+		*desc_end = '\0';
+	}
+
+	return 0;
+}
+
+
+/*
+ * scdrv_event_severity
+ *
+ * Figure out how urgent a message we should write to the console/syslog
+ * via printk.
+ */
+static char *
+scdrv_event_severity(int code)
+{
+	int ev_class = (code & EV_CLASS_MASK);
+	int ev_severity = (code & EV_SEVERITY_MASK);
+	char *pk_severity = KERN_NOTICE;
+
+	switch (ev_class) {
+	case EV_CLASS_POWER:
+		switch (ev_severity) {
+		case EV_SEVERITY_POWER_LOW_WARNING:
+		case EV_SEVERITY_POWER_HIGH_WARNING:
+			pk_severity = KERN_WARNING;
+			break;
+		case EV_SEVERITY_POWER_HIGH_FAULT:
+		case EV_SEVERITY_POWER_LOW_FAULT:
+			pk_severity = KERN_ALERT;
+			break;
+		}
+		break;
+	case EV_CLASS_FAN:
+		switch (ev_severity) {
+		case EV_SEVERITY_FAN_WARNING:
+			pk_severity = KERN_WARNING;
+			break;
+		case EV_SEVERITY_FAN_FAULT:
+			pk_severity = KERN_CRIT;
+			break;
+		}
+		break;
+	case EV_CLASS_TEMP:
+		switch (ev_severity) {
+		case EV_SEVERITY_TEMP_ADVISORY:
+			pk_severity = KERN_WARNING;
+			break;
+		case EV_SEVERITY_TEMP_CRITICAL:
+			pk_severity = KERN_CRIT;
+			break;
+		case EV_SEVERITY_TEMP_FAULT:
+			pk_severity = KERN_ALERT;
+			break;
+		}
+		break;
+	case EV_CLASS_ENV:
+		pk_severity = KERN_ALERT;
+		break;
+	case EV_CLASS_TEST_FAULT:
+		pk_severity = KERN_ALERT;
+		break;
+	case EV_CLASS_TEST_WARNING:
+		pk_severity = KERN_WARNING;
+		break;
+	case EV_CLASS_PWRD_NOTIFY:
+		pk_severity = KERN_ALERT;
+		break;
+	}
+
+	return pk_severity;
+}
+
+
+/*
+ * scdrv_dispatch_event
+ *
+ * Do the right thing with an incoming event.  That's often nothing
+ * more than printing it to the system log.  For power-down notifications
+ * we start a graceful shutdown.
+ */
+static void
+scdrv_dispatch_event(char *event, int len)
+{
+	int code, esp_code, src;
+	char desc[CHUNKSIZE];
+	char *severity;
+
+	if (scdrv_parse_event(event, &src, &code, &esp_code, desc) < 0) {
+		/* ignore uninterpretible event */
+		return;
+	}
+
+	/* how urgent is the message? */
+	severity = scdrv_event_severity(code);
+
+	if ((code & EV_CLASS_MASK) == EV_CLASS_PWRD_NOTIFY) {
+		struct task_struct *p;
+
+		/* give a SIGPWR signal to init proc */
+
+		/* first find init's task */
+		read_lock(&tasklist_lock);
+		for_each_process(p) {
+			if (p->pid == 1)
+				break;
+		}
+		if (p) { /* we found init's task */
+			printk(KERN_EMERG "Power off indication received. Initiating power fail sequence...\n");
+			force_sig(SIGPWR, p);
+		} else { /* failed to find init's task - just give message(s) */
+			printk(KERN_WARNING "Failed to find init proc to handle power off!\n");
+			printk("%s|$(0x%x)%s\n", severity, esp_code, desc);
+		}
+		read_unlock(&tasklist_lock);
+	} else {
+		/* print to system log */
+		printk("%s|$(0x%x)%s\n", severity, esp_code, desc);
+	}
+}
+
+
+/*
+ * scdrv_event
+ *
+ * Called as a tasklet when an event arrives from the L1.  Read the event
+ * from where it's temporarily stored in SAL and call scdrv_dispatch_event()
+ * to send it on its way.  Keep trying to read events until SAL indicates
+ * that there are no more immediately available.
+ */
+void
+scdrv_event(unsigned long dummy)
+{
+	int status;
+	int len;
+	unsigned long flags;
+	struct subch_data_s *sd = event_sd;
+
+	/* anything to read? */
+	len = CHUNKSIZE;
+	spin_lock_irqsave(&sd->sd_rlock, flags);
+	status = ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch,
+				   sd->sd_rb, &len);
+
+	while (!(status < 0)) {
+		spin_unlock_irqrestore(&sd->sd_rlock, flags);
+		scdrv_dispatch_event(sd->sd_rb, len);
+		len = CHUNKSIZE;
+		spin_lock_irqsave(&sd->sd_rlock, flags);
+		status = ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch,
+					   sd->sd_rb, &len);
+	}
+	spin_unlock_irqrestore(&sd->sd_rlock, flags);
+}
+
+
+/*
+ * scdrv_event_init
+ *
+ * Sets up a system controller subchannel to begin receiving event
+ * messages. This is sort of a specialized version of scdrv_open()
+ * in drivers/char/sn_sysctl.c.
+ */
+void
+scdrv_event_init(struct sysctl_data_s *scd)
+{
+	int rv;
+
+	event_sd = kmalloc(sizeof (struct subch_data_s), GFP_KERNEL);
+	if (event_sd == NULL) {
+		printk(KERN_WARNING "%s: couldn't allocate subchannel info"
+		       " for event monitoring\n", __FUNCTION__);
+		return;
+	}
+
+	/* initialize subch_data_s fields */
+	memset(event_sd, 0, sizeof (struct subch_data_s));
+	event_sd->sd_nasid = scd->scd_nasid;
+	spin_lock_init(&event_sd->sd_rlock);
+
+	/* ask the system controllers to send events to this node */
+	event_sd->sd_subch = ia64_sn_sysctl_event_init(scd->scd_nasid);
+
+	if (event_sd->sd_subch < 0) {
+		kfree(event_sd);
+		printk(KERN_WARNING "%s: couldn't open event subchannel\n",
+		       __FUNCTION__);
+		return;
+	}
+
+	/* hook event subchannel up to the system controller interrupt */
+	rv = request_irq(SGI_UART_VECTOR, scdrv_event_interrupt,
+			 SA_SHIRQ | SA_INTERRUPT,
+			 "system controller events", event_sd);
+	if (rv) {
+		printk(KERN_WARNING "%s: irq request failed (%d)\n",
+		       __FUNCTION__, rv);
+		ia64_sn_irtr_close(event_sd->sd_nasid, event_sd->sd_subch);
+		kfree(event_sd);
+		return;
+	}
+}
+
+