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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/powerpc/platforms/ps3/system-bus.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
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>
Diffstat (limited to 'kernel/arch/powerpc/platforms/ps3/system-bus.c')
-rw-r--r--kernel/arch/powerpc/platforms/ps3/system-bus.c813
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);