[POWERPC] Fix cell "new style" mapping and add debug

This fixes a typo in the "new style" code for mapping SPE resources,
which causes it to try to map the same resource 4 times.

It also adds some pr_debug's that are useful to track down issues with
the firmware when bringinh up new machines.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 33 insertions, 8 deletions

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index d0fb959e3ef..7aa809d5a24 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -655,14 +655,19 @@ static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
 
         for (i=0; i < 3; i++) {
                 ret = of_irq_map_one(np, i, &oirq);
-                if (ret)
+                if (ret) {
+                        pr_debug("spu_new: failed to get irq %d\n", i);
                         goto err;
-
+                }
                 ret = -EINVAL;
+                pr_debug("  irq %d no 0x%x on %s\n", i, oirq.specifier[0],
+                         oirq.controller->full_name);
                 spu->irqs[i] = irq_create_of_mapping(oirq.controller,
                                         oirq.specifier, oirq.size);
-                if (spu->irqs[i] == NO_IRQ)
+                if (spu->irqs[i] == NO_IRQ) {
+                        pr_debug("spu_new: failed to map it !\n");
                         goto err;
+                }
         }
         return 0;
 
@@ -681,7 +686,7 @@ static int spu_map_resource(struct device_node *node, int nr,
         struct resource resource = { };
         int ret;
 
-        ret = of_address_to_resource(node, 0, &resource);
+        ret = of_address_to_resource(node, nr, &resource);
         if (ret)
                 goto out;
 
@@ -704,22 +709,42 @@ static int __init spu_map_device(struct spu *spu, struct device_node *node)
 
         ret = spu_map_resource(node, 0, (void __iomem**)&spu->local_store,
                                         &spu->local_store_phys);
-        if (ret)
+        if (ret) {
+                pr_debug("spu_new: failed to map %s resource 0\n",
+                         node->full_name);
                 goto out;
+        }
         ret = spu_map_resource(node, 1, (void __iomem**)&spu->problem,
                                         &spu->problem_phys);
-        if (ret)
+        if (ret) {
+                pr_debug("spu_new: failed to map %s resource 1\n",
+                         node->full_name);
                 goto out_unmap;
+        }
         ret = spu_map_resource(node, 2, (void __iomem**)&spu->priv2,
                                         NULL);
-        if (ret)
+        if (ret) {
+                pr_debug("spu_new: failed to map %s resource 2\n",
+                         node->full_name);
                 goto out_unmap;
+        }
 
         if (!firmware_has_feature(FW_FEATURE_LPAR))
                 ret = spu_map_resource(node, 3, (void __iomem**)&spu->priv1,
                                         NULL);
-        if (ret)
+        if (ret) {
+                pr_debug("spu_new: failed to map %s resource 3\n",
+                         node->full_name);
                 goto out_unmap;
+        }
+        pr_debug("spu_new: %s maps:\n", node->full_name);
+        pr_debug("  local store   : 0x%016lx -> 0x%p\n",
+                 spu->local_store_phys, spu->local_store);
+        pr_debug("  problem state : 0x%016lx -> 0x%p\n",
+                 spu->problem_phys, spu->problem);
+        pr_debug("  priv2         :                       0x%p\n", spu->priv2);
+        pr_debug("  priv1         :                       0x%p\n", spu->priv1);
+
         return 0;
 
 out_unmap: