X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=blobdiff_plain;f=lib%2Flmb.c;h=0343c05609f0d62f9b48b259bf3018db728b11a5;hp=3c43b95fef4a332151918ca61769c47806b8c03f;hb=dc7a08166f3a5f23e79e839a8a88849bd3397c32;hpb=74b20dad1c4cc0fd13ceca62fbab808919e1a7ea

diff --git a/lib/lmb.c b/lib/lmb.c
index 3c43b95fe..0343c05 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -15,53 +15,56 @@
 #include <linux/bitops.h>
 #include <linux/lmb.h>
 
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(fmt...) LMB_DBG(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
 #define LMB_ALLOC_ANYWHERE	0
 
 struct lmb lmb;
 
-void lmb_dump_all(void)
+static int lmb_debug;
+
+static int __init early_lmb(char *p)
 {
-#ifdef DEBUG
-	unsigned long i;
+	if (p && strstr(p, "debug"))
+		lmb_debug = 1;
+	return 0;
+}
+early_param("lmb", early_lmb);
 
-	DBG("lmb_dump_all:\n");
-	DBG("    memory.cnt		  = 0x%lx\n", lmb.memory.cnt);
-	DBG("    memory.size		  = 0x%llx\n",
-	    (unsigned long long)lmb.memory.size);
-	for (i=0; i < lmb.memory.cnt ;i++) {
-		DBG("    memory.region[0x%x].base       = 0x%llx\n",
-		    i, (unsigned long long)lmb.memory.region[i].base);
-		DBG("		      .size     = 0x%llx\n",
-		    (unsigned long long)lmb.memory.region[i].size);
-	}
+static void lmb_dump(struct lmb_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;
 
-	DBG("\n    reserved.cnt	  = 0x%lx\n", lmb.reserved.cnt);
-	DBG("    reserved.size	  = 0x%lx\n", lmb.reserved.size);
-	for (i=0; i < lmb.reserved.cnt ;i++) {
-		DBG("    reserved.region[0x%x].base       = 0x%llx\n",
-		    i, (unsigned long long)lmb.reserved.region[i].base);
-		DBG("		      .size     = 0x%llx\n",
-		    (unsigned long long)lmb.reserved.region[i].size);
+		pr_info(" %s[0x%x]\t0x%016llx - 0x%016llx, 0x%llx bytes\n",
+		    name, i, base, base + size - 1, size);
 	}
-#endif /* DEBUG */
 }
 
-static unsigned long __init lmb_addrs_overlap(u64 base1,
-		u64 size1, u64 base2, u64 size2)
+void lmb_dump_all(void)
 {
-	return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
+	if (!lmb_debug)
+		return;
+
+	pr_info("LMB configuration:\n");
+	pr_info(" rmo_size    = 0x%llx\n", (unsigned long long)lmb.rmo_size);
+	pr_info(" memory.size = 0x%llx\n", (unsigned long long)lmb.memory.size);
+
+	lmb_dump(&lmb.memory, "memory");
+	lmb_dump(&lmb.reserved, "reserved");
+}
+
+static unsigned long lmb_addrs_overlap(u64 base1, u64 size1, u64 base2,
+					u64 size2)
+{
+	return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
 }
 
-static long __init lmb_addrs_adjacent(u64 base1, u64 size1,
-		u64 base2, u64 size2)
+static long lmb_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2)
 {
 	if (base2 == base1 + size1)
 		return 1;
@@ -71,7 +74,7 @@ static long __init lmb_addrs_adjacent(u64 base1, u64 size1,
 	return 0;
 }
 
-static long __init lmb_regions_adjacent(struct lmb_region *rgn,
+static long lmb_regions_adjacent(struct lmb_region *rgn,
 		unsigned long r1, unsigned long r2)
 {
 	u64 base1 = rgn->region[r1].base;
@@ -82,7 +85,7 @@ static long __init lmb_regions_adjacent(struct lmb_region *rgn,
 	return lmb_addrs_adjacent(base1, size1, base2, size2);
 }
 
-static void __init lmb_remove_region(struct lmb_region *rgn, unsigned long r)
+static void lmb_remove_region(struct lmb_region *rgn, unsigned long r)
 {
 	unsigned long i;
 
@@ -94,14 +97,13 @@ static void __init lmb_remove_region(struct lmb_region *rgn, unsigned long r)
 }
 
 /* Assumption: base addr of region 1 < base addr of region 2 */
-static void __init lmb_coalesce_regions(struct lmb_region *rgn,
+static void lmb_coalesce_regions(struct lmb_region *rgn,
 		unsigned long r1, unsigned long r2)
 {
 	rgn->region[r1].size += rgn->region[r2].size;
 	lmb_remove_region(rgn, r2);
 }
 
-/* This routine called with relocation disabled. */
 void __init lmb_init(void)
 {
 	/* Create a dummy zero size LMB which will get coalesced away later.
@@ -117,7 +119,6 @@ void __init lmb_init(void)
 	lmb.reserved.cnt = 1;
 }
 
-/* This routine may be called with relocation disabled. */
 void __init lmb_analyze(void)
 {
 	int i;
@@ -128,8 +129,7 @@ void __init lmb_analyze(void)
 		lmb.memory.size += lmb.memory.region[i].size;
 }
 
-/* This routine called with relocation disabled. */
-static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
+static long lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
 {
 	unsigned long coalesced = 0;
 	long adjacent, i;
@@ -141,7 +141,7 @@ static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
 	}
 
 	/* First try and coalesce this LMB with another. */
-	for (i=0; i < rgn->cnt; i++) {
+	for (i = 0; i < rgn->cnt; i++) {
 		u64 rgnbase = rgn->region[i].base;
 		u64 rgnsize = rgn->region[i].size;
 
@@ -149,21 +149,20 @@ static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
 			/* Already have this region, so we're done */
 			return 0;
 
-		adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
-		if ( adjacent > 0 ) {
+		adjacent = lmb_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 ) {
+		} else if (adjacent < 0) {
 			rgn->region[i].size += size;
 			coalesced++;
 			break;
 		}
 	}
 
-	if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
+	if ((i < rgn->cnt - 1) && lmb_regions_adjacent(rgn, i, i+1)) {
 		lmb_coalesce_regions(rgn, i, i+1);
 		coalesced++;
 	}
@@ -174,7 +173,7 @@ static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
 		return -1;
 
 	/* Couldn't coalesce the LMB, so add it to the sorted table. */
-	for (i = rgn->cnt-1; i >= 0; i--) {
+	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;
@@ -194,10 +193,9 @@ static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
 	return 0;
 }
 
-/* This routine may be called with relocation disabled. */
-long __init lmb_add(u64 base, u64 size)
+long lmb_add(u64 base, u64 size)
 {
-	struct lmb_region *_rgn = &(lmb.memory);
+	struct lmb_region *_rgn = &lmb.memory;
 
 	/* On pSeries LPAR systems, the first LMB is our RMO region. */
 	if (base == 0)
@@ -207,31 +205,160 @@ long __init lmb_add(u64 base, u64 size)
 
 }
 
+long lmb_remove(u64 base, u64 size)
+{
+	struct lmb_region *rgn = &(lmb.memory);
+	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)) {
+		lmb_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 lmb_add_region(rgn, end, rgnend - end);
+}
+
 long __init lmb_reserve(u64 base, u64 size)
 {
-	struct lmb_region *_rgn = &(lmb.reserved);
+	struct lmb_region *_rgn = &lmb.reserved;
 
 	BUG_ON(0 == size);
 
 	return lmb_add_region(_rgn, base, size);
 }
 
-long __init lmb_overlaps_region(struct lmb_region *rgn, u64 base,
-				u64 size)
+long __init lmb_overlaps_region(struct lmb_region *rgn, u64 base, u64 size)
 {
 	unsigned long i;
 
-	for (i=0; i < rgn->cnt; i++) {
+	for (i = 0; i < rgn->cnt; i++) {
 		u64 rgnbase = rgn->region[i].base;
 		u64 rgnsize = rgn->region[i].size;
-		if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
+		if (lmb_addrs_overlap(base, size, rgnbase, rgnsize))
 			break;
-		}
 	}
 
 	return (i < rgn->cnt) ? i : -1;
 }
 
+static u64 lmb_align_down(u64 addr, u64 size)
+{
+	return addr & ~(size - 1);
+}
+
+static u64 lmb_align_up(u64 addr, u64 size)
+{
+	return (addr + (size - 1)) & ~(size - 1);
+}
+
+static u64 __init lmb_alloc_nid_unreserved(u64 start, u64 end,
+					   u64 size, u64 align)
+{
+	u64 base, res_base;
+	long j;
+
+	base = lmb_align_down((end - size), align);
+	while (start <= base) {
+		j = lmb_overlaps_region(&lmb.reserved, base, size);
+		if (j < 0) {
+			/* this area isn't reserved, take it */
+			if (lmb_add_region(&lmb.reserved, base, size) < 0)
+				base = ~(u64)0;
+			return base;
+		}
+		res_base = lmb.reserved.region[j].base;
+		if (res_base < size)
+			break;
+		base = lmb_align_down(res_base - size, align);
+	}
+
+	return ~(u64)0;
+}
+
+static u64 __init lmb_alloc_nid_region(struct lmb_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 = lmb_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 = lmb_alloc_nid_unreserved(start, this_end,
+							   size, align);
+			if (ret != ~(u64)0)
+				return ret;
+		}
+		start = this_end;
+	}
+
+	return ~(u64)0;
+}
+
+u64 __init lmb_alloc_nid(u64 size, u64 align, int nid,
+			 u64 (*nid_range)(u64 start, u64 end, int *nid))
+{
+	struct lmb_region *mem = &lmb.memory;
+	int i;
+
+	BUG_ON(0 == size);
+
+	size = lmb_align_up(size, align);
+
+	for (i = 0; i < mem->cnt; i++) {
+		u64 ret = lmb_alloc_nid_region(&mem->region[i],
+					       nid_range,
+					       size, align, nid);
+		if (ret != ~(u64)0)
+			return ret;
+	}
+
+	return lmb_alloc(size, align);
+}
+
 u64 __init lmb_alloc(u64 size, u64 align)
 {
 	return lmb_alloc_base(size, align, LMB_ALLOC_ANYWHERE);
@@ -250,31 +377,27 @@ u64 __init lmb_alloc_base(u64 size, u64 align, u64 max_addr)
 	return alloc;
 }
 
-static u64 lmb_align_down(u64 addr, u64 size)
-{
-	return addr & ~(size - 1);
-}
-
-static u64 lmb_align_up(u64 addr, u64 size)
-{
-	return (addr + (size - 1)) & ~(size - 1);
-}
-
 u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr)
 {
 	long i, j;
 	u64 base = 0;
+	u64 res_base;
 
 	BUG_ON(0 == size);
 
+	size = lmb_align_up(size, align);
+
 	/* On some platforms, make sure we allocate lowmem */
+	/* Note that LMB_REAL_LIMIT may be LMB_ALLOC_ANYWHERE */
 	if (max_addr == LMB_ALLOC_ANYWHERE)
 		max_addr = LMB_REAL_LIMIT;
 
-	for (i = lmb.memory.cnt-1; i >= 0; i--) {
+	for (i = lmb.memory.cnt - 1; i >= 0; i--) {
 		u64 lmbbase = lmb.memory.region[i].base;
 		u64 lmbsize = lmb.memory.region[i].size;
 
+		if (lmbsize < size)
+			continue;
 		if (max_addr == LMB_ALLOC_ANYWHERE)
 			base = lmb_align_down(lmbbase + lmbsize - size, align);
 		else if (lmbbase < max_addr) {
@@ -283,22 +406,21 @@ u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr)
 		} else
 			continue;
 
-		while ((lmbbase <= base) &&
-		       ((j = lmb_overlaps_region(&lmb.reserved, base, size)) >= 0) )
-			base = lmb_align_down(lmb.reserved.region[j].base - size,
-					      align);
-
-		if ((base != 0) && (lmbbase <= base))
-			break;
+		while (base && lmbbase <= base) {
+			j = lmb_overlaps_region(&lmb.reserved, base, size);
+			if (j < 0) {
+				/* this area isn't reserved, take it */
+				if (lmb_add_region(&lmb.reserved, base, size) < 0)
+					return 0;
+				return base;
+			}
+			res_base = lmb.reserved.region[j].base;
+			if (res_base < size)
+				break;
+			base = lmb_align_down(res_base - size, align);
+		}
 	}
-
-	if (i < 0)
-		return 0;
-
-	if (lmb_add_region(&lmb.reserved, base, lmb_align_up(size, align)) < 0)
-		return 0;
-
-	return base;
+	return 0;
 }
 
 /* You must call lmb_analyze() before this. */
@@ -307,7 +429,7 @@ u64 __init lmb_phys_mem_size(void)
 	return lmb.memory.size;
 }
 
-u64 __init lmb_end_of_DRAM(void)
+u64 lmb_end_of_DRAM(void)
 {
 	int idx = lmb.memory.cnt - 1;
 
@@ -321,7 +443,7 @@ void __init lmb_enforce_memory_limit(u64 memory_limit)
 	u64 limit;
 	struct lmb_property *p;
 
-	if (! memory_limit)
+	if (!memory_limit)
 		return;
 
 	/* Truncate the lmb regions to satisfy the memory limit. */
@@ -340,6 +462,8 @@ void __init lmb_enforce_memory_limit(u64 memory_limit)
 	if (lmb.memory.region[0].size < lmb.rmo_size)
 		lmb.rmo_size = lmb.memory.region[0].size;
 
+	memory_limit = lmb_end_of_DRAM();
+
 	/* And truncate any reserves above the limit also. */
 	for (i = 0; i < lmb.reserved.cnt; i++) {
 		p = &lmb.reserved.region[i];
@@ -368,3 +492,36 @@ int __init lmb_is_reserved(u64 addr)
 	}
 	return 0;
 }
+
+/*
+ * Given a <base, len>, find which memory regions belong to this range.
+ * Adjust the request and return a contiguous chunk.
+ */
+int lmb_find(struct lmb_property *res)
+{
+	int i;
+	u64 rstart, rend;
+
+	rstart = res->base;
+	rend = rstart + res->size - 1;
+
+	for (i = 0; i < lmb.memory.cnt; i++) {
+		u64 start = lmb.memory.region[i].base;
+		u64 end = start + lmb.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;
+}