sparc: Size mondo queues more sanely.

[pandora-kernel.git] / arch / sparc / kernel / mdesc.c

diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c
index 42f28c7..acaebb6 100644 (file)
--- a/arch/sparc/kernel/mdesc.c
+++ b/arch/sparc/kernel/mdesc.c
@@ -508,6 +508,8 @@ const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
 }
 EXPORT_SYMBOL(mdesc_node_name);
 
+static u64 max_cpus = 64;
+
 static void __init report_platform_properties(void)
 {
        struct mdesc_handle *hp = mdesc_grab();
@@ -543,8 +545,10 @@ static void __init report_platform_properties(void)
        if (v)
                printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v);
        v = mdesc_get_property(hp, pn, "max-cpus", NULL);
-       if (v)
-               printk("PLATFORM: max-cpus [%llu]\n", *v);
+       if (v) {
+               max_cpus = *v;
+               printk("PLATFORM: max-cpus [%llu]\n", max_cpus);
+       }
 
 #ifdef CONFIG_SMP
        {
@@ -715,7 +719,7 @@ static void __cpuinit set_proc_ids(struct mdesc_handle *hp)
 }
 
 static void __cpuinit get_one_mondo_bits(const u64 *p, unsigned int *mask,
-                                        unsigned char def)
+                                        unsigned long def, unsigned long max)
 {
        u64 val;
 
@@ -726,6 +730,9 @@ static void __cpuinit get_one_mondo_bits(const u64 *p, unsigned int *mask,
        if (!val || val >= 64)
                goto use_default;
 
+       if (val > max)
+               val = max;
+
        *mask = ((1U << val) * 64U) - 1U;
        return;
 
@@ -736,19 +743,28 @@ use_default:
 static void __cpuinit get_mondo_data(struct mdesc_handle *hp, u64 mp,
                                     struct trap_per_cpu *tb)
 {
+       static int printed;
        const u64 *val;
 
        val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL);
-       get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7);
+       get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7, ilog2(max_cpus * 2));
 
        val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
-       get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7);
+       get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7, 8);
 
        val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
-       get_one_mondo_bits(val, &tb->resum_qmask, 6);
+       get_one_mondo_bits(val, &tb->resum_qmask, 6, 7);
 
        val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
-       get_one_mondo_bits(val, &tb->nonresum_qmask, 2);
+       get_one_mondo_bits(val, &tb->nonresum_qmask, 2, 2);
+       if (!printed++) {
+               pr_info("SUN4V: Mondo queue sizes "
+                       "[cpu(%u) dev(%u) r(%u) nr(%u)]\n",
+                       tb->cpu_mondo_qmask + 1,
+                       tb->dev_mondo_qmask + 1,
+                       tb->resum_qmask + 1,
+                       tb->nonresum_qmask + 1);
+       }
 }
 
 static void * __cpuinit mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask)