1 files changed, 0 insertions, 705 deletions
diff --git a/ANDROID_3.4.5/drivers/base/memory.c b/ANDROID_3.4.5/drivers/base/memory.c
deleted file mode 100644
index 7dda4f79..00000000
--- a/ANDROID_3.4.5/drivers/base/memory.c
+++ /dev/null
@@ -1,705 +0,0 @@
-/*
- * Memory subsystem support
- *
- * Written by Matt Tolentino <matthew.e.tolentino@intel.com>
- *            Dave Hansen <haveblue@us.ibm.com>
- *
- * This file provides the necessary infrastructure to represent
- * a SPARSEMEM-memory-model system's physical memory in /sysfs.
- * All arch-independent code that assumes MEMORY_HOTPLUG requires
- * SPARSEMEM should be contained here, or in mm/memory_hotplug.c.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/topology.h>
-#include <linux/capability.h>
-#include <linux/device.h>
-#include <linux/memory.h>
-#include <linux/kobject.h>
-#include <linux/memory_hotplug.h>
-#include <linux/mm.h>
-#include <linux/mutex.h>
-#include <linux/stat.h>
-#include <linux/slab.h>
-
-#include <linux/atomic.h>
-#include <asm/uaccess.h>
-
-static DEFINE_MUTEX(mem_sysfs_mutex);
-
-#define MEMORY_CLASS_NAME	"memory"
-
-static int sections_per_block;
-
-static inline int base_memory_block_id(int section_nr)
-{
-	return section_nr / sections_per_block;
-}
-
-static struct bus_type memory_subsys = {
-	.name = MEMORY_CLASS_NAME,
-	.dev_name = MEMORY_CLASS_NAME,
-};
-
-static BLOCKING_NOTIFIER_HEAD(memory_chain);
-
-int register_memory_notifier(struct notifier_block *nb)
-{
-        return blocking_notifier_chain_register(&memory_chain, nb);
-}
-EXPORT_SYMBOL(register_memory_notifier);
-
-void unregister_memory_notifier(struct notifier_block *nb)
-{
-        blocking_notifier_chain_unregister(&memory_chain, nb);
-}
-EXPORT_SYMBOL(unregister_memory_notifier);
-
-static ATOMIC_NOTIFIER_HEAD(memory_isolate_chain);
-
-int register_memory_isolate_notifier(struct notifier_block *nb)
-{
-	return atomic_notifier_chain_register(&memory_isolate_chain, nb);
-}
-EXPORT_SYMBOL(register_memory_isolate_notifier);
-
-void unregister_memory_isolate_notifier(struct notifier_block *nb)
-{
-	atomic_notifier_chain_unregister(&memory_isolate_chain, nb);
-}
-EXPORT_SYMBOL(unregister_memory_isolate_notifier);
-
-/*
- * register_memory - Setup a sysfs device for a memory block
- */
-static
-int register_memory(struct memory_block *memory)
-{
-	int error;
-
-	memory->dev.bus = &memory_subsys;
-	memory->dev.id = memory->start_section_nr / sections_per_block;
-
-	error = device_register(&memory->dev);
-	return error;
-}
-
-static void
-unregister_memory(struct memory_block *memory)
-{
-	BUG_ON(memory->dev.bus != &memory_subsys);
-
-	/* drop the ref. we got in remove_memory_block() */
-	kobject_put(&memory->dev.kobj);
-	device_unregister(&memory->dev);
-}
-
-unsigned long __weak memory_block_size_bytes(void)
-{
-	return MIN_MEMORY_BLOCK_SIZE;
-}
-
-static unsigned long get_memory_block_size(void)
-{
-	unsigned long block_sz;
-
-	block_sz = memory_block_size_bytes();
-
-	/* Validate blk_sz is a power of 2 and not less than section size */
-	if ((block_sz & (block_sz - 1)) || (block_sz < MIN_MEMORY_BLOCK_SIZE)) {
-		WARN_ON(1);
-		block_sz = MIN_MEMORY_BLOCK_SIZE;
-	}
-
-	return block_sz;
-}
-
-/*
- * use this as the physical section index that this memsection
- * uses.
- */
-
-static ssize_t show_mem_start_phys_index(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct memory_block *mem =
-		container_of(dev, struct memory_block, dev);
-	unsigned long phys_index;
-
-	phys_index = mem->start_section_nr / sections_per_block;
-	return sprintf(buf, "%08lx\n", phys_index);
-}
-
-static ssize_t show_mem_end_phys_index(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct memory_block *mem =
-		container_of(dev, struct memory_block, dev);
-	unsigned long phys_index;
-
-	phys_index = mem->end_section_nr / sections_per_block;
-	return sprintf(buf, "%08lx\n", phys_index);
-}
-
-/*
- * Show whether the section of memory is likely to be hot-removable
- */
-static ssize_t show_mem_removable(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	unsigned long i, pfn;
-	int ret = 1;
-	struct memory_block *mem =
-		container_of(dev, struct memory_block, dev);
-
-	for (i = 0; i < sections_per_block; i++) {
-		pfn = section_nr_to_pfn(mem->start_section_nr + i);
-		ret &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
-	}
-
-	return sprintf(buf, "%d\n", ret);
-}
-
-/*
- * online, offline, going offline, etc.
- */
-static ssize_t show_mem_state(struct device *dev,
-			struct device_attribute *attr, char *buf)
-{
-	struct memory_block *mem =
-		container_of(dev, struct memory_block, dev);
-	ssize_t len = 0;
-
-	/*
-	 * We can probably put these states in a nice little array
-	 * so that they're not open-coded
-	 */
-	switch (mem->state) {
-		case MEM_ONLINE:
-			len = sprintf(buf, "online\n");
-			break;
-		case MEM_OFFLINE:
-			len = sprintf(buf, "offline\n");
-			break;
-		case MEM_GOING_OFFLINE:
-			len = sprintf(buf, "going-offline\n");
-			break;
-		default:
-			len = sprintf(buf, "ERROR-UNKNOWN-%ld\n",
-					mem->state);
-			WARN_ON(1);
-			break;
-	}
-
-	return len;
-}
-
-int memory_notify(unsigned long val, void *v)
-{
-	return blocking_notifier_call_chain(&memory_chain, val, v);
-}
-
-int memory_isolate_notify(unsigned long val, void *v)
-{
-	return atomic_notifier_call_chain(&memory_isolate_chain, val, v);
-}
-
-/*
- * The probe routines leave the pages reserved, just as the bootmem code does.
- * Make sure they're still that way.
- */
-static bool pages_correctly_reserved(unsigned long start_pfn,
-					unsigned long nr_pages)
-{
-	int i, j;
-	struct page *page;
-	unsigned long pfn = start_pfn;
-
-	/*
-	 * memmap between sections is not contiguous except with
-	 * SPARSEMEM_VMEMMAP. We lookup the page once per section
-	 * and assume memmap is contiguous within each section
-	 */
-	for (i = 0; i < sections_per_block; i++, pfn += PAGES_PER_SECTION) {
-		if (WARN_ON_ONCE(!pfn_valid(pfn)))
-			return false;
-		page = pfn_to_page(pfn);
-
-		for (j = 0; j < PAGES_PER_SECTION; j++) {
-			if (PageReserved(page + j))
-				continue;
-
-			printk(KERN_WARNING "section number %ld page number %d "
-				"not reserved, was it already online?\n",
-				pfn_to_section_nr(pfn), j);
-
-			return false;
-		}
-	}
-
-	return true;
-}
-
-/*
- * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
- * OK to have direct references to sparsemem variables in here.
- */
-static int
-memory_block_action(unsigned long phys_index, unsigned long action)
-{
-	unsigned long start_pfn, start_paddr;
-	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
-	struct page *first_page;
-	int ret;
-
-	first_page = pfn_to_page(phys_index << PFN_SECTION_SHIFT);
-
-	switch (action) {
-		case MEM_ONLINE:
-			start_pfn = page_to_pfn(first_page);
-
-			if (!pages_correctly_reserved(start_pfn, nr_pages))
-				return -EBUSY;
-
-			ret = online_pages(start_pfn, nr_pages);
-			break;
-		case MEM_OFFLINE:
-			start_paddr = page_to_pfn(first_page) << PAGE_SHIFT;
-			ret = remove_memory(start_paddr,
-					    nr_pages << PAGE_SHIFT);
-			break;
-		default:
-			WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: "
-			     "%ld\n", __func__, phys_index, action, action);
-			ret = -EINVAL;
-	}
-
-	return ret;
-}
-
-static int memory_block_change_state(struct memory_block *mem,
-		unsigned long to_state, unsigned long from_state_req)
-{
-	int ret = 0;
-
-	mutex_lock(&mem->state_mutex);
-
-	if (mem->state != from_state_req) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (to_state == MEM_OFFLINE)
-		mem->state = MEM_GOING_OFFLINE;
-
-	ret = memory_block_action(mem->start_section_nr, to_state);
-
-	if (ret) {
-		mem->state = from_state_req;
-		goto out;
-	}
-
-	mem->state = to_state;
-	switch (mem->state) {
-	case MEM_OFFLINE:
-		kobject_uevent(&mem->dev.kobj, KOBJ_OFFLINE);
-		break;
-	case MEM_ONLINE:
-		kobject_uevent(&mem->dev.kobj, KOBJ_ONLINE);
-		break;
-	default:
-		break;
-	}
-out:
-	mutex_unlock(&mem->state_mutex);
-	return ret;
-}
-
-static ssize_t
-store_mem_state(struct device *dev,
-		struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct memory_block *mem;
-	int ret = -EINVAL;
-
-	mem = container_of(dev, struct memory_block, dev);
-
-	if (!strncmp(buf, "online", min((int)count, 6)))
-		ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
-	else if(!strncmp(buf, "offline", min((int)count, 7)))
-		ret = memory_block_change_state(mem, MEM_OFFLINE, MEM_ONLINE);
-
-	if (ret)
-		return ret;
-	return count;
-}
-
-/*
- * phys_device is a bad name for this.  What I really want
- * is a way to differentiate between memory ranges that
- * are part of physical devices that constitute
- * a complete removable unit or fru.
- * i.e. do these ranges belong to the same physical device,
- * s.t. if I offline all of these sections I can then
- * remove the physical device?
- */
-static ssize_t show_phys_device(struct device *dev,
-				struct device_attribute *attr, char *buf)
-{
-	struct memory_block *mem =
-		container_of(dev, struct memory_block, dev);
-	return sprintf(buf, "%d\n", mem->phys_device);
-}
-
-static DEVICE_ATTR(phys_index, 0444, show_mem_start_phys_index, NULL);
-static DEVICE_ATTR(end_phys_index, 0444, show_mem_end_phys_index, NULL);
-static DEVICE_ATTR(state, 0644, show_mem_state, store_mem_state);
-static DEVICE_ATTR(phys_device, 0444, show_phys_device, NULL);
-static DEVICE_ATTR(removable, 0444, show_mem_removable, NULL);
-
-#define mem_create_simple_file(mem, attr_name)	\
-	device_create_file(&mem->dev, &dev_attr_##attr_name)
-#define mem_remove_simple_file(mem, attr_name)	\
-	device_remove_file(&mem->dev, &dev_attr_##attr_name)
-
-/*
- * Block size attribute stuff
- */
-static ssize_t
-print_block_size(struct device *dev, struct device_attribute *attr,
-		 char *buf)
-{
-	return sprintf(buf, "%lx\n", get_memory_block_size());
-}
-
-static DEVICE_ATTR(block_size_bytes, 0444, print_block_size, NULL);
-
-static int block_size_init(void)
-{
-	return device_create_file(memory_subsys.dev_root,
-				  &dev_attr_block_size_bytes);
-}
-
-/*
- * Some architectures will have custom drivers to do this, and
- * will not need to do it from userspace.  The fake hot-add code
- * as well as ppc64 will do all of their discovery in userspace
- * and will require this interface.
- */
-#ifdef CONFIG_ARCH_MEMORY_PROBE
-static ssize_t
-memory_probe_store(struct device *dev, struct device_attribute *attr,
-		   const char *buf, size_t count)
-{
-	u64 phys_addr;
-	int nid;
-	int i, ret;
-	unsigned long pages_per_block = PAGES_PER_SECTION * sections_per_block;
-
-	phys_addr = simple_strtoull(buf, NULL, 0);
-
-	if (phys_addr & ((pages_per_block << PAGE_SHIFT) - 1))
-		return -EINVAL;
-
-	for (i = 0; i < sections_per_block; i++) {
-		nid = memory_add_physaddr_to_nid(phys_addr);
-		ret = add_memory(nid, phys_addr,
-				 PAGES_PER_SECTION << PAGE_SHIFT);
-		if (ret)
-			goto out;
-
-		phys_addr += MIN_MEMORY_BLOCK_SIZE;
-	}
-
-	ret = count;
-out:
-	return ret;
-}
-static DEVICE_ATTR(probe, S_IWUSR, NULL, memory_probe_store);
-
-static int memory_probe_init(void)
-{
-	return device_create_file(memory_subsys.dev_root, &dev_attr_probe);
-}
-#else
-static inline int memory_probe_init(void)
-{
-	return 0;
-}
-#endif
-
-#ifdef CONFIG_MEMORY_FAILURE
-/*
- * Support for offlining pages of memory
- */
-
-/* Soft offline a page */
-static ssize_t
-store_soft_offline_page(struct device *dev,
-			struct device_attribute *attr,
-			const char *buf, size_t count)
-{
-	int ret;
-	u64 pfn;
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-	if (strict_strtoull(buf, 0, &pfn) < 0)
-		return -EINVAL;
-	pfn >>= PAGE_SHIFT;
-	if (!pfn_valid(pfn))
-		return -ENXIO;
-	ret = soft_offline_page(pfn_to_page(pfn), 0);
-	return ret == 0 ? count : ret;
-}
-
-/* Forcibly offline a page, including killing processes. */
-static ssize_t
-store_hard_offline_page(struct device *dev,
-			struct device_attribute *attr,
-			const char *buf, size_t count)
-{
-	int ret;
-	u64 pfn;
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-	if (strict_strtoull(buf, 0, &pfn) < 0)
-		return -EINVAL;
-	pfn >>= PAGE_SHIFT;
-	ret = memory_failure(pfn, 0, 0);
-	return ret ? ret : count;
-}
-
-static DEVICE_ATTR(soft_offline_page, 0644, NULL, store_soft_offline_page);
-static DEVICE_ATTR(hard_offline_page, 0644, NULL, store_hard_offline_page);
-
-static __init int memory_fail_init(void)
-{
-	int err;
-
-	err = device_create_file(memory_subsys.dev_root,
-				&dev_attr_soft_offline_page);
-	if (!err)
-		err = device_create_file(memory_subsys.dev_root,
-				&dev_attr_hard_offline_page);
-	return err;
-}
-#else
-static inline int memory_fail_init(void)
-{
-	return 0;
-}
-#endif
-
-/*
- * Note that phys_device is optional.  It is here to allow for
- * differentiation between which *physical* devices each
- * section belongs to...
- */
-int __weak arch_get_memory_phys_device(unsigned long start_pfn)
-{
-	return 0;
-}
-
-/*
- * A reference for the returned object is held and the reference for the
- * hinted object is released.
- */
-struct memory_block *find_memory_block_hinted(struct mem_section *section,
-					      struct memory_block *hint)
-{
-	int block_id = base_memory_block_id(__section_nr(section));
-	struct device *hintdev = hint ? &hint->dev : NULL;
-	struct device *dev;
-
-	dev = subsys_find_device_by_id(&memory_subsys, block_id, hintdev);
-	if (hint)
-		put_device(&hint->dev);
-	if (!dev)
-		return NULL;
-	return container_of(dev, struct memory_block, dev);
-}
-
-/*
- * For now, we have a linear search to go find the appropriate
- * memory_block corresponding to a particular phys_index. If
- * this gets to be a real problem, we can always use a radix
- * tree or something here.
- *
- * This could be made generic for all device subsystems.
- */
-struct memory_block *find_memory_block(struct mem_section *section)
-{
-	return find_memory_block_hinted(section, NULL);
-}
-
-static int init_memory_block(struct memory_block **memory,
-			     struct mem_section *section, unsigned long state)
-{
-	struct memory_block *mem;
-	unsigned long start_pfn;
-	int scn_nr;
-	int ret = 0;
-
-	mem = kzalloc(sizeof(*mem), GFP_KERNEL);
-	if (!mem)
-		return -ENOMEM;
-
-	scn_nr = __section_nr(section);
-	mem->start_section_nr =
-			base_memory_block_id(scn_nr) * sections_per_block;
-	mem->end_section_nr = mem->start_section_nr + sections_per_block - 1;
-	mem->state = state;
-	mem->section_count++;
-	mutex_init(&mem->state_mutex);
-	start_pfn = section_nr_to_pfn(mem->start_section_nr);
-	mem->phys_device = arch_get_memory_phys_device(start_pfn);
-
-	ret = register_memory(mem);
-	if (!ret)
-		ret = mem_create_simple_file(mem, phys_index);
-	if (!ret)
-		ret = mem_create_simple_file(mem, end_phys_index);
-	if (!ret)
-		ret = mem_create_simple_file(mem, state);
-	if (!ret)
-		ret = mem_create_simple_file(mem, phys_device);
-	if (!ret)
-		ret = mem_create_simple_file(mem, removable);
-
-	*memory = mem;
-	return ret;
-}
-
-static int add_memory_section(int nid, struct mem_section *section,
-			struct memory_block **mem_p,
-			unsigned long state, enum mem_add_context context)
-{
-	struct memory_block *mem = NULL;
-	int scn_nr = __section_nr(section);
-	int ret = 0;
-
-	mutex_lock(&mem_sysfs_mutex);
-
-	if (context == BOOT) {
-		/* same memory block ? */
-		if (mem_p && *mem_p)
-			if (scn_nr >= (*mem_p)->start_section_nr &&
-			    scn_nr <= (*mem_p)->end_section_nr) {
-				mem = *mem_p;
-				kobject_get(&mem->dev.kobj);
-			}
-	} else
-		mem = find_memory_block(section);
-
-	if (mem) {
-		mem->section_count++;
-		kobject_put(&mem->dev.kobj);
-	} else {
-		ret = init_memory_block(&mem, section, state);
-		/* store memory_block pointer for next loop */
-		if (!ret && context == BOOT)
-			if (mem_p)
-				*mem_p = mem;
-	}
-
-	if (!ret) {
-		if (context == HOTPLUG &&
-		    mem->section_count == sections_per_block)
-			ret = register_mem_sect_under_node(mem, nid);
-	}
-
-	mutex_unlock(&mem_sysfs_mutex);
-	return ret;
-}
-
-int remove_memory_block(unsigned long node_id, struct mem_section *section,
-		int phys_device)
-{
-	struct memory_block *mem;
-
-	mutex_lock(&mem_sysfs_mutex);
-	mem = find_memory_block(section);
-	unregister_mem_sect_under_nodes(mem, __section_nr(section));
-
-	mem->section_count--;
-	if (mem->section_count == 0) {
-		mem_remove_simple_file(mem, phys_index);
-		mem_remove_simple_file(mem, end_phys_index);
-		mem_remove_simple_file(mem, state);
-		mem_remove_simple_file(mem, phys_device);
-		mem_remove_simple_file(mem, removable);
-		unregister_memory(mem);
-		kfree(mem);
-	} else
-		kobject_put(&mem->dev.kobj);
-
-	mutex_unlock(&mem_sysfs_mutex);
-	return 0;
-}
-
-/*
- * need an interface for the VM to add new memory regions,
- * but without onlining it.
- */
-int register_new_memory(int nid, struct mem_section *section)
-{
-	return add_memory_section(nid, section, NULL, MEM_OFFLINE, HOTPLUG);
-}
-
-int unregister_memory_section(struct mem_section *section)
-{
-	if (!present_section(section))
-		return -EINVAL;
-
-	return remove_memory_block(0, section, 0);
-}
-
-/*
- * Initialize the sysfs support for memory devices...
- */
-int __init memory_dev_init(void)
-{
-	unsigned int i;
-	int ret;
-	int err;
-	unsigned long block_sz;
-	struct memory_block *mem = NULL;
-
-	ret = subsys_system_register(&memory_subsys, NULL);
-	if (ret)
-		goto out;
-
-	block_sz = get_memory_block_size();
-	sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
-
-	/*
-	 * Create entries for memory sections that were found
-	 * during boot and have been initialized
-	 */
-	for (i = 0; i < NR_MEM_SECTIONS; i++) {
-		if (!present_section_nr(i))
-			continue;
-		/* don't need to reuse memory_block if only one per block */
-		err = add_memory_section(0, __nr_to_section(i),
-				 (sections_per_block == 1) ? NULL : &mem,
-					 MEM_ONLINE,
-					 BOOT);
-		if (!ret)
-			ret = err;
-	}
-
-	err = memory_probe_init();
-	if (!ret)
-		ret = err;
-	err = memory_fail_init();
-	if (!ret)
-		ret = err;
-	err = block_size_init();
-	if (!ret)
-		ret = err;
-out:
-	if (ret)
-		printk(KERN_ERR "%s() failed: %d\n", __func__, ret);
-	return ret;
-}