Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Avoid JBUS errors on some Niagara systems.
  [FUSION]: Fix mptspi.c build with CONFIG_PM not set.
  [TG3]: Handle Sun onboard tg3 chips more correctly.
  [SPARC64]: Dump local cpu registers in sun4v_log_error()

2 files changed, 125 insertions, 10 deletions

diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index 2b7a1f316a93..0c0895202970 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -599,18 +599,128 @@ struct pci_iommu_ops pci_sun4v_iommu_ops = {
 
 /* SUN4V PCI configuration space accessors. */
 
-static inline int pci_sun4v_out_of_range(struct pci_pbm_info *pbm, unsigned int bus, unsigned int device, unsigned int func)
+struct pdev_entry {
+        struct pdev_entry       *next;
+        u32                     devhandle;
+        unsigned int            bus;
+        unsigned int            device;
+        unsigned int            func;
+};
+
+#define PDEV_HTAB_SIZE  16
+#define PDEV_HTAB_MASK  (PDEV_HTAB_SIZE - 1)
+static struct pdev_entry *pdev_htab[PDEV_HTAB_SIZE];
+
+static inline unsigned int pdev_hashfn(u32 devhandle, unsigned int bus, unsigned int device, unsigned int func)
 {
-        if (bus == pbm->pci_first_busno) {
-                if (device == 0 && func == 0)
-                        return 0;
-                return 1;
+        unsigned int val;
+
+        val = (devhandle ^ (devhandle >> 4));
+        val ^= bus;
+        val ^= device;
+        val ^= func;
+
+        return val & PDEV_HTAB_MASK;
+}
+
+static int pdev_htab_add(u32 devhandle, unsigned int bus, unsigned int device, unsigned int func)
+{
+        struct pdev_entry *p = kmalloc(sizeof(*p), GFP_KERNEL);
+        struct pdev_entry **slot;
+
+        if (!p)
+                return -ENOMEM;
+
+        slot = &pdev_htab[pdev_hashfn(devhandle, bus, device, func)];
+        p->next = *slot;
+        *slot = p;
+
+        p->devhandle = devhandle;
+        p->bus = bus;
+        p->device = device;
+        p->func = func;
+
+        return 0;
+}
+
+/* Recursively descend into the OBP device tree, rooted at toplevel_node,
+ * looking for a PCI device matching bus and devfn.
+ */
+static int obp_find(struct linux_prom_pci_registers *pregs, int toplevel_node, unsigned int bus, unsigned int devfn)
+{
+        toplevel_node = prom_getchild(toplevel_node);
+
+        while (toplevel_node != 0) {
+                int ret = obp_find(pregs, toplevel_node, bus, devfn);
+
+                if (ret != 0)
+                        return ret;
+
+                ret = prom_getproperty(toplevel_node, "reg", (char *) pregs,
+                                       sizeof(*pregs) * PROMREG_MAX);
+                if (ret == 0 || ret == -1)
+                        goto next_sibling;
+
+                if (((pregs[0].phys_hi >> 16) & 0xff) == bus &&
+                    ((pregs[0].phys_hi >> 8) & 0xff) == devfn)
+                        break;
+
+        next_sibling:
+                toplevel_node = prom_getsibling(toplevel_node);
+        }
+
+        return toplevel_node;
+}
+
+static int pdev_htab_populate(struct pci_pbm_info *pbm)
+{
+        struct linux_prom_pci_registers pr[PROMREG_MAX];
+        u32 devhandle = pbm->devhandle;
+        unsigned int bus;
+
+        for (bus = pbm->pci_first_busno; bus <= pbm->pci_last_busno; bus++) {
+                unsigned int devfn;
+
+                for (devfn = 0; devfn < 256; devfn++) {
+                        unsigned int device = PCI_SLOT(devfn);
+                        unsigned int func = PCI_FUNC(devfn);
+
+                        if (obp_find(pr, pbm->prom_node, bus, devfn)) {
+                                int err = pdev_htab_add(devhandle, bus,
+                                                        device, func);
+                                if (err)
+                                        return err;
+                        }
+                }
+        }
+
+        return 0;
+}
+
+static struct pdev_entry *pdev_find(u32 devhandle, unsigned int bus, unsigned int device, unsigned int func)
+{
+        struct pdev_entry *p;
+
+        p = pdev_htab[pdev_hashfn(devhandle, bus, device, func)];
+        while (p) {
+                if (p->devhandle == devhandle &&
+                    p->bus == bus &&
+                    p->device == device &&
+                    p->func == func)
+                        break;
+
+                p = p->next;
         }
 
+        return p;
+}
+
+static inline int pci_sun4v_out_of_range(struct pci_pbm_info *pbm, unsigned int bus, unsigned int device, unsigned int func)
+{
         if (bus < pbm->pci_first_busno ||
             bus > pbm->pci_last_busno)
                 return 1;
-        return 0;
+        return pdev_find(pbm->devhandle, bus, device, func) == NULL;
 }
 
 static int pci_sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
@@ -1063,6 +1173,8 @@ static void pci_sun4v_pbm_init(struct pci_controller_info *p, int prom_node, u32
 
         pci_sun4v_get_bus_range(pbm);
         pci_sun4v_iommu_init(pbm);
+
+        pdev_htab_populate(pbm);
 }
 
 void sun4v_pci_init(int node, char *model_name)
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index 2793a5d82380..563db528e031 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -1797,7 +1797,9 @@ static const char *sun4v_err_type_to_str(u32 type)
         };
 }
 
-static void sun4v_log_error(struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
+extern void __show_regs(struct pt_regs * regs);
+
+static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt)
 {
         int cnt;
 
@@ -1830,6 +1832,8 @@ static void sun4v_log_error(struct sun4v_error_entry *ent, int cpu, const char *
                pfx,
                ent->err_raddr, ent->err_size, ent->err_cpu);
 
+        __show_regs(regs);
+
         if ((cnt = atomic_read(ocnt)) != 0) {
                 atomic_set(ocnt, 0);
                 wmb();
@@ -1862,7 +1866,7 @@ void sun4v_resum_error(struct pt_regs *regs, unsigned long offset)
 
         put_cpu();
 
-        sun4v_log_error(&local_copy, cpu,
+        sun4v_log_error(regs, &local_copy, cpu,
                         KERN_ERR "RESUMABLE ERROR",
                         &sun4v_resum_oflow_cnt);
 }
@@ -1910,7 +1914,7 @@ void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset)
         }
 #endif
 
-        sun4v_log_error(&local_copy, cpu,
+        sun4v_log_error(regs, &local_copy, cpu,
                         KERN_EMERG "NON-RESUMABLE ERROR",
                         &sun4v_nonresum_oflow_cnt);
 
@@ -2200,7 +2204,6 @@ static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
 void die_if_kernel(char *str, struct pt_regs *regs)
 {
         static int die_counter;
-        extern void __show_regs(struct pt_regs * regs);
         extern void smp_report_regs(void);
         int count = 0;