Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 813 insertions, 0 deletions

diff --git a/kernel/arch/powerpc/platforms/ps3/system-bus.c b/kernel/arch/powerpc/platforms/ps3/system-bus.c
new file mode 100644
index 000000000..5606fe36f
--- /dev/null
+++ b/kernel/arch/powerpc/platforms/ps3/system-bus.c
@@ -0,0 +1,813 @@
+/*
+ *  PS3 system bus driver.
+ *
+ *  Copyright (C) 2006 Sony Computer Entertainment Inc.
+ *  Copyright 2006 Sony Corp.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <asm/udbg.h>
+#include <asm/lv1call.h>
+#include <asm/firmware.h>
+#include <asm/cell-regs.h>
+
+#include "platform.h"
+
+static struct device ps3_system_bus = {
+	.init_name = "ps3_system",
+};
+
+/* FIXME: need device usage counters! */
+struct {
+	struct mutex mutex;
+	int sb_11; /* usb 0 */
+	int sb_12; /* usb 0 */
+	int gpu;
+} static usage_hack;
+
+static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
+			 u64 dev_id)
+{
+	return dev->bus_id == bus_id && dev->dev_id == dev_id;
+}
+
+static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
+{
+	int result;
+
+	BUG_ON(!dev->bus_id);
+	mutex_lock(&usage_hack.mutex);
+
+	if (ps3_is_device(dev, 1, 1)) {
+		usage_hack.sb_11++;
+		if (usage_hack.sb_11 > 1) {
+			result = 0;
+			goto done;
+		}
+	}
+
+	if (ps3_is_device(dev, 1, 2)) {
+		usage_hack.sb_12++;
+		if (usage_hack.sb_12 > 1) {
+			result = 0;
+			goto done;
+		}
+	}
+
+	result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
+
+	if (result) {
+		pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
+			__LINE__, ps3_result(result));
+			result = -EPERM;
+	}
+
+done:
+	mutex_unlock(&usage_hack.mutex);
+	return result;
+}
+
+static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
+{
+	int result;
+
+	BUG_ON(!dev->bus_id);
+	mutex_lock(&usage_hack.mutex);
+
+	if (ps3_is_device(dev, 1, 1)) {
+		usage_hack.sb_11--;
+		if (usage_hack.sb_11) {
+			result = 0;
+			goto done;
+		}
+	}
+
+	if (ps3_is_device(dev, 1, 2)) {
+		usage_hack.sb_12--;
+		if (usage_hack.sb_12) {
+			result = 0;
+			goto done;
+		}
+	}
+
+	result = lv1_close_device(dev->bus_id, dev->dev_id);
+	BUG_ON(result);
+
+done:
+	mutex_unlock(&usage_hack.mutex);
+	return result;
+}
+
+static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
+{
+	int result;
+
+	mutex_lock(&usage_hack.mutex);
+
+	usage_hack.gpu++;
+	if (usage_hack.gpu > 1) {
+		result = 0;
+		goto done;
+	}
+
+	result = lv1_gpu_open(0);
+
+	if (result) {
+		pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
+			__LINE__, ps3_result(result));
+			result = -EPERM;
+	}
+
+done:
+	mutex_unlock(&usage_hack.mutex);
+	return result;
+}
+
+static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
+{
+	int result;
+
+	mutex_lock(&usage_hack.mutex);
+
+	usage_hack.gpu--;
+	if (usage_hack.gpu) {
+		result = 0;
+		goto done;
+	}
+
+	result = lv1_gpu_close();
+	BUG_ON(result);
+
+done:
+	mutex_unlock(&usage_hack.mutex);
+	return result;
+}
+
+int ps3_open_hv_device(struct ps3_system_bus_device *dev)
+{
+	BUG_ON(!dev);
+	pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
+
+	switch (dev->match_id) {
+	case PS3_MATCH_ID_EHCI:
+	case PS3_MATCH_ID_OHCI:
+	case PS3_MATCH_ID_GELIC:
+	case PS3_MATCH_ID_STOR_DISK:
+	case PS3_MATCH_ID_STOR_ROM:
+	case PS3_MATCH_ID_STOR_FLASH:
+		return ps3_open_hv_device_sb(dev);
+
+	case PS3_MATCH_ID_SOUND:
+	case PS3_MATCH_ID_GPU:
+		return ps3_open_hv_device_gpu(dev);
+
+	case PS3_MATCH_ID_AV_SETTINGS:
+	case PS3_MATCH_ID_SYSTEM_MANAGER:
+		pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
+			__LINE__, dev->match_id);
+		pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
+			dev->bus_id);
+		BUG();
+		return -EINVAL;
+
+	default:
+		break;
+	}
+
+	pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
+		dev->match_id);
+	BUG();
+	return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(ps3_open_hv_device);
+
+int ps3_close_hv_device(struct ps3_system_bus_device *dev)
+{
+	BUG_ON(!dev);
+	pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
+
+	switch (dev->match_id) {
+	case PS3_MATCH_ID_EHCI:
+	case PS3_MATCH_ID_OHCI:
+	case PS3_MATCH_ID_GELIC:
+	case PS3_MATCH_ID_STOR_DISK:
+	case PS3_MATCH_ID_STOR_ROM:
+	case PS3_MATCH_ID_STOR_FLASH:
+		return ps3_close_hv_device_sb(dev);
+
+	case PS3_MATCH_ID_SOUND:
+	case PS3_MATCH_ID_GPU:
+		return ps3_close_hv_device_gpu(dev);
+
+	case PS3_MATCH_ID_AV_SETTINGS:
+	case PS3_MATCH_ID_SYSTEM_MANAGER:
+		pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
+			__LINE__, dev->match_id);
+		pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
+			dev->bus_id);
+		BUG();
+		return -EINVAL;
+
+	default:
+		break;
+	}
+
+	pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
+		dev->match_id);
+	BUG();
+	return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(ps3_close_hv_device);
+
+#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
+static void _dump_mmio_region(const struct ps3_mmio_region* r,
+	const char* func, int line)
+{
+	pr_debug("%s:%d: dev       %llu:%llu\n", func, line, r->dev->bus_id,
+		r->dev->dev_id);
+	pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
+	pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
+	pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
+}
+
+static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
+{
+	int result;
+	u64 lpar_addr;
+
+	result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
+		r->bus_addr, r->len, r->page_size, &lpar_addr);
+	r->lpar_addr = lpar_addr;
+
+	if (result) {
+		pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
+			__func__, __LINE__, ps3_result(result));
+		r->lpar_addr = 0;
+	}
+
+	dump_mmio_region(r);
+	return result;
+}
+
+static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
+{
+	/* device specific; do nothing currently */
+	return 0;
+}
+
+int ps3_mmio_region_create(struct ps3_mmio_region *r)
+{
+	return r->mmio_ops->create(r);
+}
+EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
+
+static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
+{
+	int result;
+
+	dump_mmio_region(r);
+	result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
+		r->lpar_addr);
+
+	if (result)
+		pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
+			__func__, __LINE__, ps3_result(result));
+
+	r->lpar_addr = 0;
+	return result;
+}
+
+static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
+{
+	/* device specific; do nothing currently */
+	return 0;
+}
+
+
+int ps3_free_mmio_region(struct ps3_mmio_region *r)
+{
+	return r->mmio_ops->free(r);
+}
+
+EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
+
+static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
+	.create = ps3_sb_mmio_region_create,
+	.free = ps3_sb_free_mmio_region
+};
+
+static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
+	.create = ps3_ioc0_mmio_region_create,
+	.free = ps3_ioc0_free_mmio_region
+};
+
+int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
+	struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
+	enum ps3_mmio_page_size page_size)
+{
+	r->dev = dev;
+	r->bus_addr = bus_addr;
+	r->len = len;
+	r->page_size = page_size;
+	switch (dev->dev_type) {
+	case PS3_DEVICE_TYPE_SB:
+		r->mmio_ops = &ps3_mmio_sb_region_ops;
+		break;
+	case PS3_DEVICE_TYPE_IOC0:
+		r->mmio_ops = &ps3_mmio_ioc0_region_ops;
+		break;
+	default:
+		BUG();
+		return -EINVAL;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
+
+static int ps3_system_bus_match(struct device *_dev,
+	struct device_driver *_drv)
+{
+	int result;
+	struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+
+	if (!dev->match_sub_id)
+		result = dev->match_id == drv->match_id;
+	else
+		result = dev->match_sub_id == drv->match_sub_id &&
+			dev->match_id == drv->match_id;
+
+	if (result)
+		pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
+			__func__, __LINE__,
+			dev->match_id, dev->match_sub_id, dev_name(&dev->core),
+			drv->match_id, drv->match_sub_id, drv->core.name);
+	else
+		pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
+			__func__, __LINE__,
+			dev->match_id, dev->match_sub_id, dev_name(&dev->core),
+			drv->match_id, drv->match_sub_id, drv->core.name);
+
+	return result;
+}
+
+static int ps3_system_bus_probe(struct device *_dev)
+{
+	int result = 0;
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	struct ps3_system_bus_driver *drv;
+
+	BUG_ON(!dev);
+	dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
+
+	drv = ps3_system_bus_dev_to_system_bus_drv(dev);
+	BUG_ON(!drv);
+
+	if (drv->probe)
+		result = drv->probe(dev);
+	else
+		pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
+			dev_name(&dev->core));
+
+	pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
+	return result;
+}
+
+static int ps3_system_bus_remove(struct device *_dev)
+{
+	int result = 0;
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	struct ps3_system_bus_driver *drv;
+
+	BUG_ON(!dev);
+	dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
+
+	drv = ps3_system_bus_dev_to_system_bus_drv(dev);
+	BUG_ON(!drv);
+
+	if (drv->remove)
+		result = drv->remove(dev);
+	else
+		dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
+			__func__, __LINE__, drv->core.name);
+
+	pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
+	return result;
+}
+
+static void ps3_system_bus_shutdown(struct device *_dev)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	struct ps3_system_bus_driver *drv;
+
+	BUG_ON(!dev);
+
+	dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
+		dev->match_id);
+
+	if (!dev->core.driver) {
+		dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
+			__LINE__);
+		return;
+	}
+
+	drv = ps3_system_bus_dev_to_system_bus_drv(dev);
+
+	BUG_ON(!drv);
+
+	dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
+		dev_name(&dev->core), drv->core.name);
+
+	if (drv->shutdown)
+		drv->shutdown(dev);
+	else if (drv->remove) {
+		dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
+			__func__, __LINE__, drv->core.name);
+		drv->remove(dev);
+	} else {
+		dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
+			__func__, __LINE__, drv->core.name);
+		BUG();
+	}
+
+	dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
+}
+
+static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+
+	if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
+			   dev->match_sub_id))
+		return -ENOMEM;
+	return 0;
+}
+
+static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
+	char *buf)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
+			   dev->match_sub_id);
+
+	return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+
+static struct device_attribute ps3_system_bus_dev_attrs[] = {
+	__ATTR_RO(modalias),
+	__ATTR_NULL,
+};
+
+struct bus_type ps3_system_bus_type = {
+	.name = "ps3_system_bus",
+	.match = ps3_system_bus_match,
+	.uevent = ps3_system_bus_uevent,
+	.probe = ps3_system_bus_probe,
+	.remove = ps3_system_bus_remove,
+	.shutdown = ps3_system_bus_shutdown,
+	.dev_attrs = ps3_system_bus_dev_attrs,
+};
+
+static int __init ps3_system_bus_init(void)
+{
+	int result;
+
+	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+		return -ENODEV;
+
+	pr_debug(" -> %s:%d\n", __func__, __LINE__);
+
+	mutex_init(&usage_hack.mutex);
+
+	result = device_register(&ps3_system_bus);
+	BUG_ON(result);
+
+	result = bus_register(&ps3_system_bus_type);
+	BUG_ON(result);
+
+	pr_debug(" <- %s:%d\n", __func__, __LINE__);
+	return result;
+}
+
+core_initcall(ps3_system_bus_init);
+
+/* Allocates a contiguous real buffer and creates mappings over it.
+ * Returns the virtual address of the buffer and sets dma_handle
+ * to the dma address (mapping) of the first page.
+ */
+static void * ps3_alloc_coherent(struct device *_dev, size_t size,
+				 dma_addr_t *dma_handle, gfp_t flag,
+				 struct dma_attrs *attrs)
+{
+	int result;
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	unsigned long virt_addr;
+
+	flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
+	flag |= __GFP_ZERO;
+
+	virt_addr = __get_free_pages(flag, get_order(size));
+
+	if (!virt_addr) {
+		pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
+		goto clean_none;
+	}
+
+	result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
+			     CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
+			     CBE_IOPTE_SO_RW | CBE_IOPTE_M);
+
+	if (result) {
+		pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
+			__func__, __LINE__, result);
+		BUG_ON("check region type");
+		goto clean_alloc;
+	}
+
+	return (void*)virt_addr;
+
+clean_alloc:
+	free_pages(virt_addr, get_order(size));
+clean_none:
+	dma_handle = NULL;
+	return NULL;
+}
+
+static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
+			      dma_addr_t dma_handle, struct dma_attrs *attrs)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+
+	ps3_dma_unmap(dev->d_region, dma_handle, size);
+	free_pages((unsigned long)vaddr, get_order(size));
+}
+
+/* Creates TCEs for a user provided buffer.  The user buffer must be
+ * contiguous real kernel storage (not vmalloc).  The address passed here
+ * comprises a page address and offset into that page. The dma_addr_t
+ * returned will point to the same byte within the page as was passed in.
+ */
+
+static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
+	unsigned long offset, size_t size, enum dma_data_direction direction,
+	struct dma_attrs *attrs)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	int result;
+	dma_addr_t bus_addr;
+	void *ptr = page_address(page) + offset;
+
+	result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
+			     &bus_addr,
+			     CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
+			     CBE_IOPTE_SO_RW | CBE_IOPTE_M);
+
+	if (result) {
+		pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
+			__func__, __LINE__, result);
+	}
+
+	return bus_addr;
+}
+
+static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
+				    unsigned long offset, size_t size,
+				    enum dma_data_direction direction,
+				    struct dma_attrs *attrs)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	int result;
+	dma_addr_t bus_addr;
+	u64 iopte_flag;
+	void *ptr = page_address(page) + offset;
+
+	iopte_flag = CBE_IOPTE_M;
+	switch (direction) {
+	case DMA_BIDIRECTIONAL:
+		iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
+		break;
+	case DMA_TO_DEVICE:
+		iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
+		break;
+	case DMA_FROM_DEVICE:
+		iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
+		break;
+	default:
+		/* not happned */
+		BUG();
+	};
+	result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
+			     &bus_addr, iopte_flag);
+
+	if (result) {
+		pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
+			__func__, __LINE__, result);
+	}
+	return bus_addr;
+}
+
+static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
+	size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	int result;
+
+	result = ps3_dma_unmap(dev->d_region, dma_addr, size);
+
+	if (result) {
+		pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
+			__func__, __LINE__, result);
+	}
+}
+
+static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
+	int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
+{
+#if defined(CONFIG_PS3_DYNAMIC_DMA)
+	BUG_ON("do");
+	return -EPERM;
+#else
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	struct scatterlist *sg;
+	int i;
+
+	for_each_sg(sgl, sg, nents, i) {
+		int result = ps3_dma_map(dev->d_region, sg_phys(sg),
+					sg->length, &sg->dma_address, 0);
+
+		if (result) {
+			pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
+				__func__, __LINE__, result);
+			return -EINVAL;
+		}
+
+		sg->dma_length = sg->length;
+	}
+
+	return nents;
+#endif
+}
+
+static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
+			   int nents,
+			   enum dma_data_direction direction,
+			   struct dma_attrs *attrs)
+{
+	BUG();
+	return 0;
+}
+
+static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
+	int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
+{
+#if defined(CONFIG_PS3_DYNAMIC_DMA)
+	BUG_ON("do");
+#endif
+}
+
+static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
+			    int nents, enum dma_data_direction direction,
+			    struct dma_attrs *attrs)
+{
+	BUG();
+}
+
+static int ps3_dma_supported(struct device *_dev, u64 mask)
+{
+	return mask >= DMA_BIT_MASK(32);
+}
+
+static u64 ps3_dma_get_required_mask(struct device *_dev)
+{
+	return DMA_BIT_MASK(32);
+}
+
+static struct dma_map_ops ps3_sb_dma_ops = {
+	.alloc = ps3_alloc_coherent,
+	.free = ps3_free_coherent,
+	.map_sg = ps3_sb_map_sg,
+	.unmap_sg = ps3_sb_unmap_sg,
+	.dma_supported = ps3_dma_supported,
+	.get_required_mask = ps3_dma_get_required_mask,
+	.map_page = ps3_sb_map_page,
+	.unmap_page = ps3_unmap_page,
+};
+
+static struct dma_map_ops ps3_ioc0_dma_ops = {
+	.alloc = ps3_alloc_coherent,
+	.free = ps3_free_coherent,
+	.map_sg = ps3_ioc0_map_sg,
+	.unmap_sg = ps3_ioc0_unmap_sg,
+	.dma_supported = ps3_dma_supported,
+	.get_required_mask = ps3_dma_get_required_mask,
+	.map_page = ps3_ioc0_map_page,
+	.unmap_page = ps3_unmap_page,
+};
+
+/**
+ * ps3_system_bus_release_device - remove a device from the system bus
+ */
+
+static void ps3_system_bus_release_device(struct device *_dev)
+{
+	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
+	kfree(dev);
+}
+
+/**
+ * ps3_system_bus_device_register - add a device to the system bus
+ *
+ * ps3_system_bus_device_register() expects the dev object to be allocated
+ * dynamically by the caller.  The system bus takes ownership of the dev
+ * object and frees the object in ps3_system_bus_release_device().
+ */
+
+int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
+{
+	int result;
+	static unsigned int dev_ioc0_count;
+	static unsigned int dev_sb_count;
+	static unsigned int dev_vuart_count;
+	static unsigned int dev_lpm_count;
+
+	if (!dev->core.parent)
+		dev->core.parent = &ps3_system_bus;
+	dev->core.bus = &ps3_system_bus_type;
+	dev->core.release = ps3_system_bus_release_device;
+
+	switch (dev->dev_type) {
+	case PS3_DEVICE_TYPE_IOC0:
+		dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
+		dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
+		break;
+	case PS3_DEVICE_TYPE_SB:
+		dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
+		dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
+
+		break;
+	case PS3_DEVICE_TYPE_VUART:
+		dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
+		break;
+	case PS3_DEVICE_TYPE_LPM:
+		dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
+		break;
+	default:
+		BUG();
+	};
+
+	dev->core.of_node = NULL;
+	set_dev_node(&dev->core, 0);
+
+	pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
+
+	result = device_register(&dev->core);
+	return result;
+}
+
+EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
+
+int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
+{
+	int result;
+
+	pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
+
+	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+		return -ENODEV;
+
+	drv->core.bus = &ps3_system_bus_type;
+
+	result = driver_register(&drv->core);
+	pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
+	return result;
+}
+
+EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
+
+void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
+{
+	pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
+	driver_unregister(&drv->core);
+	pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
+}
+
+EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);