[SPARC64]: Fix central/FHC bus handling on Ex000 systems.

1) probe_other_fhcs() wants to see only non-central FHC
   busses, so skip FHCs that don't sit off the root

2) Like SBUS, FHC can lack the appropriate address and
   size cell count properties, so add an of_busses[]
   entry and handlers for that.

3) Central FHC irq translator probing was buggy.  We
   were trying to use dp->child in irq_trans_init but
   that linkage is not setup at this point.

   So instead, pass in the parent of "dp" and look for
   the child "fhc" with parent "central".

Thanks to the tireless assistence of Ben Collins in tracking
down these problems and testing out these fixes.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc64/kernel/central.c b/arch/sparc64/kernel/central.c
index b66336db00eeaa7079e90719c9357f2d76affeeb..e724c54af02913316e648f6f19ed0f56d76a31bf 100644 (file)
--- a/arch/sparc64/kernel/central.c
+++ b/arch/sparc64/kernel/central.c
@@ -126,6 +126,10 @@ static void probe_other_fhcs(void)
                int board;
                u32 tmp;
 
+               if (dp->parent &&
+                   dp->parent->parent != NULL)
+                       continue;
+
                fhc = (struct linux_fhc *)
                        central_alloc_bootmem(sizeof(struct linux_fhc));
                if (fhc == NULL)

diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c
index d3dfb2a36d477584d8722430e07f01f701f9f01a..983ca5f485cfe34ad0e2c78b7dfcc9d6740043f7 100644 (file)
--- a/arch/sparc64/kernel/of_device.c
+++ b/arch/sparc64/kernel/of_device.c
@@ -402,16 +402,22 @@ static void of_bus_sbus_count_cells(struct device_node *child,
                *sizec = 1;
 }
 
-static int of_bus_sbus_map(u32 *addr, const u32 *range, int na, int ns, int pna)
-{
-       return of_bus_default_map(addr, range, na, ns, pna);
-}
-
-static unsigned int of_bus_sbus_get_flags(u32 *addr)
+/*
+ * FHC/Central bus specific translator.
+ *
+ * This is just needed to hard-code the address and size cell
+ * counts.  'fhc' and 'central' nodes lack the #address-cells and
+ * #size-cells properties, and if you walk to the root on such
+ * Enterprise boxes all you'll get is a #size-cells of 2 which is
+ * not what we want to use.
+ */
+static int of_bus_fhc_match(struct device_node *np)
 {
-       return IORESOURCE_MEM;
+       return !strcmp(np->name, "fhc") ||
+               !strcmp(np->name, "central");
 }
 
+#define of_bus_fhc_count_cells of_bus_sbus_count_cells
 
 /*
  * Array of bus specific translators
@@ -433,8 +439,17 @@ static struct of_bus of_busses[] = {
                .addr_prop_name = "reg",
                .match = of_bus_sbus_match,
                .count_cells = of_bus_sbus_count_cells,
-               .map = of_bus_sbus_map,
-               .get_flags = of_bus_sbus_get_flags,
+               .map = of_bus_default_map,
+               .get_flags = of_bus_default_get_flags,
+       },
+       /* FHC */
+       {
+               .name = "fhc",
+               .addr_prop_name = "reg",
+               .match = of_bus_fhc_match,
+               .count_cells = of_bus_fhc_count_cells,
+               .map = of_bus_default_map,
+               .get_flags = of_bus_default_get_flags,
        },
        /* Default */
        {

diff --git a/arch/sparc64/kernel/prom.c b/arch/sparc64/kernel/prom.c
index e21cd6afa709c2724c353dfab813d18df6a03974..c60efb3cb22e037feec3b3017e0d8aef80f8d883 100644 (file)
--- a/arch/sparc64/kernel/prom.c
+++ b/arch/sparc64/kernel/prom.c
@@ -1079,23 +1079,22 @@ static void sun4v_vdev_irq_trans_init(struct device_node *dp)
 
 static void irq_trans_init(struct device_node *dp)
 {
-       const char *model;
 #ifdef CONFIG_PCI
+       const char *model;
        int i;
 #endif
 
+#ifdef CONFIG_PCI
        model = of_get_property(dp, "model", NULL);
        if (!model)
                model = of_get_property(dp, "compatible", NULL);
-       if (!model)
-               return;
-
-#ifdef CONFIG_PCI
-       for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
-               struct irq_trans *t = &pci_irq_trans_table[i];
+       if (model) {
+               for (i = 0; i < ARRAY_SIZE(pci_irq_trans_table); i++) {
+                       struct irq_trans *t = &pci_irq_trans_table[i];
 
-               if (!strcmp(model, t->name))
-                       return t->init(dp);
+                       if (!strcmp(model, t->name))
+                               return t->init(dp);
+               }
        }
 #endif
 #ifdef CONFIG_SBUS
@@ -1103,8 +1102,9 @@ static void irq_trans_init(struct device_node *dp)
            !strcmp(dp->name, "sbi"))
                return sbus_irq_trans_init(dp);
 #endif
-       if (!strcmp(dp->name, "central"))
-               return central_irq_trans_init(dp->child);
+       if (!strcmp(dp->name, "fhc") &&
+           !strcmp(dp->parent->name, "central"))
+               return central_irq_trans_init(dp);
        if (!strcmp(dp->name, "virtual-devices"))
                return sun4v_vdev_irq_trans_init(dp);
 }
@@ -1516,7 +1516,7 @@ static char * __init get_one_property(phandle node, const char *name)
        return buf;
 }
 
-static struct device_node * __init create_node(phandle node)
+static struct device_node * __init create_node(phandle node, struct device_node *parent)
 {
        struct device_node *dp;
 
@@ -1525,6 +1525,7 @@ static struct device_node * __init create_node(phandle node)
 
        dp = prom_early_alloc(sizeof(*dp));
        dp->unique_id = unique_id++;
+       dp->parent = parent;
 
        kref_init(&dp->kref);
 
@@ -1543,12 +1544,11 @@ static struct device_node * __init build_tree(struct device_node *parent, phandl
 {
        struct device_node *dp;
 
-       dp = create_node(node);
+       dp = create_node(node, parent);
        if (dp) {
                *(*nextp) = dp;
                *nextp = &dp->allnext;
 
-               dp->parent = parent;
                dp->path_component_name = build_path_component(dp);
                dp->full_name = build_full_name(dp);
 
@@ -1564,7 +1564,7 @@ void __init prom_build_devicetree(void)
 {
        struct device_node **nextp;
 
-       allnodes = create_node(prom_root_node);
+       allnodes = create_node(prom_root_node, NULL);
        allnodes->path_component_name = "";
        allnodes->full_name = "/";