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-rw-r--r--arch/powerpc/mm/numa.c174
1 files changed, 76 insertions, 98 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 5ac08b8ab65..9047145095a 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -158,35 +158,6 @@ static void unmap_cpu_from_node(unsigned long cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
-static struct device_node * __cpuinit find_cpu_node(unsigned int cpu)
-{
- unsigned int hw_cpuid = get_hard_smp_processor_id(cpu);
- struct device_node *cpu_node = NULL;
- const unsigned int *interrupt_server, *reg;
- int len;
-
- while ((cpu_node = of_find_node_by_type(cpu_node, "cpu")) != NULL) {
- /* Try interrupt server first */
- interrupt_server = of_get_property(cpu_node,
- "ibm,ppc-interrupt-server#s", &len);
-
- len = len / sizeof(u32);
-
- if (interrupt_server && (len > 0)) {
- while (len--) {
- if (interrupt_server[len] == hw_cpuid)
- return cpu_node;
- }
- } else {
- reg = of_get_property(cpu_node, "reg", &len);
- if (reg && (len > 0) && (reg[0] == hw_cpuid))
- return cpu_node;
- }
- }
-
- return NULL;
-}
-
/* must hold reference to node during call */
static const int *of_get_associativity(struct device_node *dev)
{
@@ -290,7 +261,7 @@ static int __init find_min_common_depth(void)
ref_points = of_get_property(rtas_root,
"ibm,associativity-reference-points", &len);
- if ((len >= 1) && ref_points) {
+ if ((len >= 2 * sizeof(unsigned int)) && ref_points) {
depth = ref_points[1];
} else {
dbg("NUMA: ibm,associativity-reference-points not found.\n");
@@ -470,7 +441,7 @@ static int of_drconf_to_nid_single(struct of_drconf_cell *drmem,
static int __cpuinit numa_setup_cpu(unsigned long lcpu)
{
int nid = 0;
- struct device_node *cpu = find_cpu_node(lcpu);
+ struct device_node *cpu = of_get_cpu_node(lcpu, NULL);
if (!cpu) {
WARN_ON(1);
@@ -652,7 +623,7 @@ static int __init parse_numa_properties(void)
for_each_present_cpu(i) {
int nid;
- cpu = find_cpu_node(i);
+ cpu = of_get_cpu_node(i, NULL);
BUG_ON(!cpu);
nid = of_node_to_nid_single(cpu);
of_node_put(cpu);
@@ -1041,57 +1012,32 @@ early_param("numa", early_numa);
#ifdef CONFIG_MEMORY_HOTPLUG
/*
- * Validate the node associated with the memory section we are
- * trying to add.
- */
-int valid_hot_add_scn(int *nid, unsigned long start, u32 lmb_size,
- unsigned long scn_addr)
-{
- nodemask_t nodes;
-
- if (*nid < 0 || !node_online(*nid))
- *nid = any_online_node(NODE_MASK_ALL);
-
- if ((scn_addr >= start) && (scn_addr < (start + lmb_size))) {
- nodes_setall(nodes);
- while (NODE_DATA(*nid)->node_spanned_pages == 0) {
- node_clear(*nid, nodes);
- *nid = any_online_node(nodes);
- }
-
- return 1;
- }
-
- return 0;
-}
-
-/*
- * Find the node associated with a hot added memory section represented
- * by the ibm,dynamic-reconfiguration-memory node.
+ * Find the node associated with a hot added memory section for
+ * memory represented in the device tree by the property
+ * ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory.
*/
static int hot_add_drconf_scn_to_nid(struct device_node *memory,
unsigned long scn_addr)
{
const u32 *dm;
- unsigned int n, rc;
+ unsigned int drconf_cell_cnt, rc;
unsigned long lmb_size;
- int default_nid = any_online_node(NODE_MASK_ALL);
- int nid;
struct assoc_arrays aa;
+ int nid = -1;
- n = of_get_drconf_memory(memory, &dm);
- if (!n)
- return default_nid;;
+ drconf_cell_cnt = of_get_drconf_memory(memory, &dm);
+ if (!drconf_cell_cnt)
+ return -1;
lmb_size = of_get_lmb_size(memory);
if (!lmb_size)
- return default_nid;
+ return -1;
rc = of_get_assoc_arrays(memory, &aa);
if (rc)
- return default_nid;
+ return -1;
- for (; n != 0; --n) {
+ for (; drconf_cell_cnt != 0; --drconf_cell_cnt) {
struct of_drconf_cell drmem;
read_drconf_cell(&drmem, &dm);
@@ -1102,15 +1048,57 @@ static int hot_add_drconf_scn_to_nid(struct device_node *memory,
|| !(drmem.flags & DRCONF_MEM_ASSIGNED))
continue;
+ if ((scn_addr < drmem.base_addr)
+ || (scn_addr >= (drmem.base_addr + lmb_size)))
+ continue;
+
nid = of_drconf_to_nid_single(&drmem, &aa);
+ break;
+ }
+
+ return nid;
+}
- if (valid_hot_add_scn(&nid, drmem.base_addr, lmb_size,
- scn_addr))
- return nid;
+/*
+ * Find the node associated with a hot added memory section for memory
+ * represented in the device tree as a node (i.e. memory@XXXX) for
+ * each lmb.
+ */
+int hot_add_node_scn_to_nid(unsigned long scn_addr)
+{
+ struct device_node *memory = NULL;
+ int nid = -1;
+
+ while ((memory = of_find_node_by_type(memory, "memory")) != NULL) {
+ unsigned long start, size;
+ int ranges;
+ const unsigned int *memcell_buf;
+ unsigned int len;
+
+ memcell_buf = of_get_property(memory, "reg", &len);
+ if (!memcell_buf || len <= 0)
+ continue;
+
+ /* ranges in cell */
+ ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells);
+
+ while (ranges--) {
+ start = read_n_cells(n_mem_addr_cells, &memcell_buf);
+ size = read_n_cells(n_mem_size_cells, &memcell_buf);
+
+ if ((scn_addr < start) || (scn_addr >= (start + size)))
+ continue;
+
+ nid = of_node_to_nid_single(memory);
+ break;
+ }
+
+ of_node_put(memory);
+ if (nid >= 0)
+ break;
}
- BUG(); /* section address should be found above */
- return 0;
+ return nid;
}
/*
@@ -1121,7 +1109,7 @@ static int hot_add_drconf_scn_to_nid(struct device_node *memory,
int hot_add_scn_to_nid(unsigned long scn_addr)
{
struct device_node *memory = NULL;
- int nid;
+ int nid, found = 0;
if (!numa_enabled || (min_common_depth < 0))
return any_online_node(NODE_MASK_ALL);
@@ -1130,35 +1118,25 @@ int hot_add_scn_to_nid(unsigned long scn_addr)
if (memory) {
nid = hot_add_drconf_scn_to_nid(memory, scn_addr);
of_node_put(memory);
- return nid;
+ } else {
+ nid = hot_add_node_scn_to_nid(scn_addr);
}
- while ((memory = of_find_node_by_type(memory, "memory")) != NULL) {
- unsigned long start, size;
- int ranges;
- const unsigned int *memcell_buf;
- unsigned int len;
-
- memcell_buf = of_get_property(memory, "reg", &len);
- if (!memcell_buf || len <= 0)
- continue;
+ if (nid < 0 || !node_online(nid))
+ nid = any_online_node(NODE_MASK_ALL);
- /* ranges in cell */
- ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells);
-ha_new_range:
- start = read_n_cells(n_mem_addr_cells, &memcell_buf);
- size = read_n_cells(n_mem_size_cells, &memcell_buf);
- nid = of_node_to_nid_single(memory);
+ if (NODE_DATA(nid)->node_spanned_pages)
+ return nid;
- if (valid_hot_add_scn(&nid, start, size, scn_addr)) {
- of_node_put(memory);
- return nid;
+ for_each_online_node(nid) {
+ if (NODE_DATA(nid)->node_spanned_pages) {
+ found = 1;
+ break;
}
-
- if (--ranges) /* process all ranges in cell */
- goto ha_new_range;
}
- BUG(); /* section address should be found above */
- return 0;
+
+ BUG_ON(!found);
+ return nid;
}
+
#endif /* CONFIG_MEMORY_HOTPLUG */