lmb: rename to memblock

via following scripts

      FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')

      sed -i \
        -e 's/lmb/memblock/g' \
        -e 's/LMB/MEMBLOCK/g' \
        $FILES

      for N in $(find . -name lmb.[ch]); do
        M=$(echo $N | sed 's/lmb/memblock/g')
        mv $N $M
      done

and remove some wrong change like lmbench and dlmb etc.

also move memblock.c from lib/ to mm/

Suggested-by: Ingo Molnar <mingo@elte.hu>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

3 files changed, 546 insertions, 0 deletions

diff --git a/mm/Kconfig b/mm/Kconfig
index 527136b2238..f4e516e9c37 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -128,6 +128,9 @@ config SPARSEMEM_VMEMMAP
 	 pfn_to_page and page_to_pfn operations.  This is the most
 	 efficient option when sufficient kernel resources are available.
 
+config HAVE_MEMBLOCK
+	boolean
+
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG
 	bool "Allow for memory hot-add"
diff --git a/mm/Makefile b/mm/Makefile
index 8982504bd03..34b2546a9e3 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -15,6 +15,8 @@ obj-y			:= bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
 			   $(mmu-y)
 obj-y += init-mm.o
 
+obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o
+
 obj-$(CONFIG_BOUNCE)	+= bounce.o
 obj-$(CONFIG_SWAP)	+= page_io.o swap_state.o swapfile.o thrash.o
 obj-$(CONFIG_HAS_DMA)	+= dmapool.o
diff --git a/mm/memblock.c b/mm/memblock.c
new file mode 100644
index 00000000000..3024eb30fc2
--- /dev/null
+++ b/mm/memblock.c
@@ -0,0 +1,541 @@
+/*
+ * Procedures for maintaining information about logical memory blocks.
+ *
+ * Peter Bergner, IBM Corp.	June 2001.
+ * Copyright (C) 2001 Peter Bergner.
+ *
+ *      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; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/memblock.h>
+
+#define MEMBLOCK_ALLOC_ANYWHERE	0
+
+struct memblock memblock;
+
+static int memblock_debug;
+
+static int __init early_memblock(char *p)
+{
+	if (p && strstr(p, "debug"))
+		memblock_debug = 1;
+	return 0;
+}
+early_param("memblock", early_memblock);
+
+static void memblock_dump(struct memblock_region *region, char *name)
+{
+	unsigned long long base, size;
+	int i;
+
+	pr_info(" %s.cnt  = 0x%lx\n", name, region->cnt);
+
+	for (i = 0; i < region->cnt; i++) {
+		base = region->region[i].base;
+		size = region->region[i].size;
+
+		pr_info(" %s[0x%x]\t0x%016llx - 0x%016llx, 0x%llx bytes\n",
+		    name, i, base, base + size - 1, size);
+	}
+}
+
+void memblock_dump_all(void)
+{
+	if (!memblock_debug)
+		return;
+
+	pr_info("MEMBLOCK configuration:\n");
+	pr_info(" rmo_size    = 0x%llx\n", (unsigned long long)memblock.rmo_size);
+	pr_info(" memory.size = 0x%llx\n", (unsigned long long)memblock.memory.size);
+
+	memblock_dump(&memblock.memory, "memory");
+	memblock_dump(&memblock.reserved, "reserved");
+}
+
+static unsigned long memblock_addrs_overlap(u64 base1, u64 size1, u64 base2,
+					u64 size2)
+{
+	return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
+}
+
+static long memblock_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2)
+{
+	if (base2 == base1 + size1)
+		return 1;
+	else if (base1 == base2 + size2)
+		return -1;
+
+	return 0;
+}
+
+static long memblock_regions_adjacent(struct memblock_region *rgn,
+		unsigned long r1, unsigned long r2)
+{
+	u64 base1 = rgn->region[r1].base;
+	u64 size1 = rgn->region[r1].size;
+	u64 base2 = rgn->region[r2].base;
+	u64 size2 = rgn->region[r2].size;
+
+	return memblock_addrs_adjacent(base1, size1, base2, size2);
+}
+
+static void memblock_remove_region(struct memblock_region *rgn, unsigned long r)
+{
+	unsigned long i;
+
+	for (i = r; i < rgn->cnt - 1; i++) {
+		rgn->region[i].base = rgn->region[i + 1].base;
+		rgn->region[i].size = rgn->region[i + 1].size;
+	}
+	rgn->cnt--;
+}
+
+/* Assumption: base addr of region 1 < base addr of region 2 */
+static void memblock_coalesce_regions(struct memblock_region *rgn,
+		unsigned long r1, unsigned long r2)
+{
+	rgn->region[r1].size += rgn->region[r2].size;
+	memblock_remove_region(rgn, r2);
+}
+
+void __init memblock_init(void)
+{
+	/* Create a dummy zero size MEMBLOCK which will get coalesced away later.
+	 * This simplifies the memblock_add() code below...
+	 */
+	memblock.memory.region[0].base = 0;
+	memblock.memory.region[0].size = 0;
+	memblock.memory.cnt = 1;
+
+	/* Ditto. */
+	memblock.reserved.region[0].base = 0;
+	memblock.reserved.region[0].size = 0;
+	memblock.reserved.cnt = 1;
+}
+
+void __init memblock_analyze(void)
+{
+	int i;
+
+	memblock.memory.size = 0;
+
+	for (i = 0; i < memblock.memory.cnt; i++)
+		memblock.memory.size += memblock.memory.region[i].size;
+}
+
+static long memblock_add_region(struct memblock_region *rgn, u64 base, u64 size)
+{
+	unsigned long coalesced = 0;
+	long adjacent, i;
+
+	if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) {
+		rgn->region[0].base = base;
+		rgn->region[0].size = size;
+		return 0;
+	}
+
+	/* First try and coalesce this MEMBLOCK with another. */
+	for (i = 0; i < rgn->cnt; i++) {
+		u64 rgnbase = rgn->region[i].base;
+		u64 rgnsize = rgn->region[i].size;
+
+		if ((rgnbase == base) && (rgnsize == size))
+			/* Already have this region, so we're done */
+			return 0;
+
+		adjacent = memblock_addrs_adjacent(base, size, rgnbase, rgnsize);
+		if (adjacent > 0) {
+			rgn->region[i].base -= size;
+			rgn->region[i].size += size;
+			coalesced++;
+			break;
+		} else if (adjacent < 0) {
+			rgn->region[i].size += size;
+			coalesced++;
+			break;
+		}
+	}
+
+	if ((i < rgn->cnt - 1) && memblock_regions_adjacent(rgn, i, i+1)) {
+		memblock_coalesce_regions(rgn, i, i+1);
+		coalesced++;
+	}
+
+	if (coalesced)
+		return coalesced;
+	if (rgn->cnt >= MAX_MEMBLOCK_REGIONS)
+		return -1;
+
+	/* Couldn't coalesce the MEMBLOCK, so add it to the sorted table. */
+	for (i = rgn->cnt - 1; i >= 0; i--) {
+		if (base < rgn->region[i].base) {
+			rgn->region[i+1].base = rgn->region[i].base;
+			rgn->region[i+1].size = rgn->region[i].size;
+		} else {
+			rgn->region[i+1].base = base;
+			rgn->region[i+1].size = size;
+			break;
+		}
+	}
+
+	if (base < rgn->region[0].base) {
+		rgn->region[0].base = base;
+		rgn->region[0].size = size;
+	}
+	rgn->cnt++;
+
+	return 0;
+}
+
+long memblock_add(u64 base, u64 size)
+{
+	struct memblock_region *_rgn = &memblock.memory;
+
+	/* On pSeries LPAR systems, the first MEMBLOCK is our RMO region. */
+	if (base == 0)
+		memblock.rmo_size = size;
+
+	return memblock_add_region(_rgn, base, size);
+
+}
+
+static long __memblock_remove(struct memblock_region *rgn, u64 base, u64 size)
+{
+	u64 rgnbegin, rgnend;
+	u64 end = base + size;
+	int i;
+
+	rgnbegin = rgnend = 0; /* supress gcc warnings */
+
+	/* Find the region where (base, size) belongs to */
+	for (i=0; i < rgn->cnt; i++) {
+		rgnbegin = rgn->region[i].base;
+		rgnend = rgnbegin + rgn->region[i].size;
+
+		if ((rgnbegin <= base) && (end <= rgnend))
+			break;
+	}
+
+	/* Didn't find the region */
+	if (i == rgn->cnt)
+		return -1;
+
+	/* Check to see if we are removing entire region */
+	if ((rgnbegin == base) && (rgnend == end)) {
+		memblock_remove_region(rgn, i);
+		return 0;
+	}
+
+	/* Check to see if region is matching at the front */
+	if (rgnbegin == base) {
+		rgn->region[i].base = end;
+		rgn->region[i].size -= size;
+		return 0;
+	}
+
+	/* Check to see if the region is matching at the end */
+	if (rgnend == end) {
+		rgn->region[i].size -= size;
+		return 0;
+	}
+
+	/*
+	 * We need to split the entry -  adjust the current one to the
+	 * beginging of the hole and add the region after hole.
+	 */
+	rgn->region[i].size = base - rgn->region[i].base;
+	return memblock_add_region(rgn, end, rgnend - end);
+}
+
+long memblock_remove(u64 base, u64 size)
+{
+	return __memblock_remove(&memblock.memory, base, size);
+}
+
+long __init memblock_free(u64 base, u64 size)
+{
+	return __memblock_remove(&memblock.reserved, base, size);
+}
+
+long __init memblock_reserve(u64 base, u64 size)
+{
+	struct memblock_region *_rgn = &memblock.reserved;
+
+	BUG_ON(0 == size);
+
+	return memblock_add_region(_rgn, base, size);
+}
+
+long memblock_overlaps_region(struct memblock_region *rgn, u64 base, u64 size)
+{
+	unsigned long i;
+
+	for (i = 0; i < rgn->cnt; i++) {
+		u64 rgnbase = rgn->region[i].base;
+		u64 rgnsize = rgn->region[i].size;
+		if (memblock_addrs_overlap(base, size, rgnbase, rgnsize))
+			break;
+	}
+
+	return (i < rgn->cnt) ? i : -1;
+}
+
+static u64 memblock_align_down(u64 addr, u64 size)
+{
+	return addr & ~(size - 1);
+}
+
+static u64 memblock_align_up(u64 addr, u64 size)
+{
+	return (addr + (size - 1)) & ~(size - 1);
+}
+
+static u64 __init memblock_alloc_nid_unreserved(u64 start, u64 end,
+					   u64 size, u64 align)
+{
+	u64 base, res_base;
+	long j;
+
+	base = memblock_align_down((end - size), align);
+	while (start <= base) {
+		j = memblock_overlaps_region(&memblock.reserved, base, size);
+		if (j < 0) {
+			/* this area isn't reserved, take it */
+			if (memblock_add_region(&memblock.reserved, base, size) < 0)
+				base = ~(u64)0;
+			return base;
+		}
+		res_base = memblock.reserved.region[j].base;
+		if (res_base < size)
+			break;
+		base = memblock_align_down(res_base - size, align);
+	}
+
+	return ~(u64)0;
+}
+
+static u64 __init memblock_alloc_nid_region(struct memblock_property *mp,
+				       u64 (*nid_range)(u64, u64, int *),
+				       u64 size, u64 align, int nid)
+{
+	u64 start, end;
+
+	start = mp->base;
+	end = start + mp->size;
+
+	start = memblock_align_up(start, align);
+	while (start < end) {
+		u64 this_end;
+		int this_nid;
+
+		this_end = nid_range(start, end, &this_nid);
+		if (this_nid == nid) {
+			u64 ret = memblock_alloc_nid_unreserved(start, this_end,
+							   size, align);
+			if (ret != ~(u64)0)
+				return ret;
+		}
+		start = this_end;
+	}
+
+	return ~(u64)0;
+}
+
+u64 __init memblock_alloc_nid(u64 size, u64 align, int nid,
+			 u64 (*nid_range)(u64 start, u64 end, int *nid))
+{
+	struct memblock_region *mem = &memblock.memory;
+	int i;
+
+	BUG_ON(0 == size);
+
+	size = memblock_align_up(size, align);
+
+	for (i = 0; i < mem->cnt; i++) {
+		u64 ret = memblock_alloc_nid_region(&mem->region[i],
+					       nid_range,
+					       size, align, nid);
+		if (ret != ~(u64)0)
+			return ret;
+	}
+
+	return memblock_alloc(size, align);
+}
+
+u64 __init memblock_alloc(u64 size, u64 align)
+{
+	return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE);
+}
+
+u64 __init memblock_alloc_base(u64 size, u64 align, u64 max_addr)
+{
+	u64 alloc;
+
+	alloc = __memblock_alloc_base(size, align, max_addr);
+
+	if (alloc == 0)
+		panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n",
+		      (unsigned long long) size, (unsigned long long) max_addr);
+
+	return alloc;
+}
+
+u64 __init __memblock_alloc_base(u64 size, u64 align, u64 max_addr)
+{
+	long i, j;
+	u64 base = 0;
+	u64 res_base;
+
+	BUG_ON(0 == size);
+
+	size = memblock_align_up(size, align);
+
+	/* On some platforms, make sure we allocate lowmem */
+	/* Note that MEMBLOCK_REAL_LIMIT may be MEMBLOCK_ALLOC_ANYWHERE */
+	if (max_addr == MEMBLOCK_ALLOC_ANYWHERE)
+		max_addr = MEMBLOCK_REAL_LIMIT;
+
+	for (i = memblock.memory.cnt - 1; i >= 0; i--) {
+		u64 memblockbase = memblock.memory.region[i].base;
+		u64 memblocksize = memblock.memory.region[i].size;
+
+		if (memblocksize < size)
+			continue;
+		if (max_addr == MEMBLOCK_ALLOC_ANYWHERE)
+			base = memblock_align_down(memblockbase + memblocksize - size, align);
+		else if (memblockbase < max_addr) {
+			base = min(memblockbase + memblocksize, max_addr);
+			base = memblock_align_down(base - size, align);
+		} else
+			continue;
+
+		while (base && memblockbase <= base) {
+			j = memblock_overlaps_region(&memblock.reserved, base, size);
+			if (j < 0) {
+				/* this area isn't reserved, take it */
+				if (memblock_add_region(&memblock.reserved, base, size) < 0)
+					return 0;
+				return base;
+			}
+			res_base = memblock.reserved.region[j].base;
+			if (res_base < size)
+				break;
+			base = memblock_align_down(res_base - size, align);
+		}
+	}
+	return 0;
+}
+
+/* You must call memblock_analyze() before this. */
+u64 __init memblock_phys_mem_size(void)
+{
+	return memblock.memory.size;
+}
+
+u64 memblock_end_of_DRAM(void)
+{
+	int idx = memblock.memory.cnt - 1;
+
+	return (memblock.memory.region[idx].base + memblock.memory.region[idx].size);
+}
+
+/* You must call memblock_analyze() after this. */
+void __init memblock_enforce_memory_limit(u64 memory_limit)
+{
+	unsigned long i;
+	u64 limit;
+	struct memblock_property *p;
+
+	if (!memory_limit)
+		return;
+
+	/* Truncate the memblock regions to satisfy the memory limit. */
+	limit = memory_limit;
+	for (i = 0; i < memblock.memory.cnt; i++) {
+		if (limit > memblock.memory.region[i].size) {
+			limit -= memblock.memory.region[i].size;
+			continue;
+		}
+
+		memblock.memory.region[i].size = limit;
+		memblock.memory.cnt = i + 1;
+		break;
+	}
+
+	if (memblock.memory.region[0].size < memblock.rmo_size)
+		memblock.rmo_size = memblock.memory.region[0].size;
+
+	memory_limit = memblock_end_of_DRAM();
+
+	/* And truncate any reserves above the limit also. */
+	for (i = 0; i < memblock.reserved.cnt; i++) {
+		p = &memblock.reserved.region[i];
+
+		if (p->base > memory_limit)
+			p->size = 0;
+		else if ((p->base + p->size) > memory_limit)
+			p->size = memory_limit - p->base;
+
+		if (p->size == 0) {
+			memblock_remove_region(&memblock.reserved, i);
+			i--;
+		}
+	}
+}
+
+int __init memblock_is_reserved(u64 addr)
+{
+	int i;
+
+	for (i = 0; i < memblock.reserved.cnt; i++) {
+		u64 upper = memblock.reserved.region[i].base +
+			memblock.reserved.region[i].size - 1;
+		if ((addr >= memblock.reserved.region[i].base) && (addr <= upper))
+			return 1;
+	}
+	return 0;
+}
+
+int memblock_is_region_reserved(u64 base, u64 size)
+{
+	return memblock_overlaps_region(&memblock.reserved, base, size);
+}
+
+/*
+ * Given a <base, len>, find which memory regions belong to this range.
+ * Adjust the request and return a contiguous chunk.
+ */
+int memblock_find(struct memblock_property *res)
+{
+	int i;
+	u64 rstart, rend;
+
+	rstart = res->base;
+	rend = rstart + res->size - 1;
+
+	for (i = 0; i < memblock.memory.cnt; i++) {
+		u64 start = memblock.memory.region[i].base;
+		u64 end = start + memblock.memory.region[i].size - 1;
+
+		if (start > rend)
+			return -1;
+
+		if ((end >= rstart) && (start < rend)) {
+			/* adjust the request */
+			if (rstart < start)
+				rstart = start;
+			if (rend > end)
+				rend = end;
+			res->base = rstart;
+			res->size = rend - rstart + 1;
+			return 0;
+		}
+	}
+	return -1;
+}