[SPARC64]: Decode virtual-devices interrupts correctly.

Need to translate through the interrupt-map{,-mask] properties.

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

1 files changed, 86 insertions, 12 deletions

diff --git a/arch/sparc64/kernel/devices.c b/arch/sparc64/kernel/devices.c
index 71eee392e141..1341b99ca7aa 100644
--- a/arch/sparc64/kernel/devices.c
+++ b/arch/sparc64/kernel/devices.c
@@ -22,6 +22,7 @@
 #include <asm/timer.h>
 #include <asm/cpudata.h>
 #include <asm/vdev.h>
+#include <asm/irq.h>
 
 /* Used to synchronize acceses to NatSemi SUPER I/O chip configure
  * operations in asm/ns87303.h
@@ -33,14 +34,28 @@ extern void central_probe(void);
 
 u32 sun4v_vdev_devhandle;
 int sun4v_vdev_root;
-struct linux_prom_pci_intmap *sun4v_vdev_intmap;
-int sun4v_vdev_num_intmap;
-struct linux_prom_pci_intmap sun4v_vdev_intmask;
+
+struct vdev_intmap {
+        unsigned int phys;
+        unsigned int irq;
+        unsigned int cnode;
+        unsigned int cinterrupt;
+};
+
+struct vdev_intmask {
+        unsigned int phys;
+        unsigned int interrupt;
+        unsigned int __unused;
+};
+
+static struct vdev_intmap *vdev_intmap;
+static int vdev_num_intmap;
+static struct vdev_intmask vdev_intmask;
 
 static void __init sun4v_virtual_device_probe(void)
 {
         struct linux_prom64_registers regs;
-        struct linux_prom_pci_intmap *ip;
+        struct vdev_intmap *ip;
         int node, sz, err;
 
         if (tlb_type != hypervisor)
@@ -58,10 +73,21 @@ static void __init sun4v_virtual_device_probe(void)
         prom_getproperty(node, "reg", (char *)&regs, sizeof(regs));
         sun4v_vdev_devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff;
 
-        sz = sizeof(*ip) * 64;
-        sun4v_vdev_intmap = ip = alloc_bootmem_low_pages(sz);
-        if (!sun4v_vdev_intmap) {
-                prom_printf("SUN4V: Error, cannot allocate vdev intmap.\n");
+        sz = prom_getproplen(node, "interrupt-map");
+        if (sz <= 0) {
+                prom_printf("SUN4V: Error, no vdev interrupt-map.\n");
+                prom_halt();
+        }
+
+        if ((sz % sizeof(*ip)) != 0) {
+                prom_printf("SUN4V: Bogus interrupt-map property size %d\n",
+                            sz);
+                prom_halt();
+        }
+
+        vdev_intmap = ip = alloc_bootmem_low_pages(sz);
+        if (!vdev_intmap) {
+                prom_printf("SUN4V: Error, cannot allocate vdev_intmap.\n");
                 prom_halt();
         }
 
@@ -70,22 +96,70 @@ static void __init sun4v_virtual_device_probe(void)
                 prom_printf("SUN4V: Fatal error, no vdev interrupt-map.\n");
                 prom_halt();
         }
+        if (err != sz) {
+                prom_printf("SUN4V: Inconsistent interrupt-map size, "
+                            "proplen(%d) vs getprop(%d).\n", sz,err);
+                prom_halt();
+        }
 
-        sun4v_vdev_num_intmap = err / sizeof(*ip);
+        vdev_num_intmap = err / sizeof(*ip);
 
         err = prom_getproperty(node, "interrupt-map-mask",
-                               (char *) &sun4v_vdev_intmask,
-                               sizeof(sun4v_vdev_intmask));
-        if (err == -1) {
+                               (char *) &vdev_intmask,
+                               sizeof(vdev_intmask));
+        if (err <= 0) {
                 prom_printf("SUN4V: Fatal error, no vdev "
                             "interrupt-map-mask.\n");
                 prom_halt();
         }
+        if (err % sizeof(vdev_intmask)) {
+                prom_printf("SUN4V: Bogus interrupt-map-mask "
+                            "property size %d\n", err);
+                prom_halt();
+        }
 
         printk("SUN4V: virtual-devices devhandle[%x]\n",
                sun4v_vdev_devhandle);
 }
 
+unsigned int sun4v_vdev_device_interrupt(unsigned int dev_node)
+{
+        unsigned int irq, reg;
+        int err, i;
+
+        err = prom_getproperty(dev_node, "interrupts",
+                               (char *) &irq, sizeof(irq));
+        if (err <= 0) {
+                printk("VDEV: Cannot get \"interrupts\" "
+                       "property for OBP node %x\n", dev_node);
+                return 0;
+        }
+
+        err = prom_getproperty(dev_node, "reg",
+                               (char *) &reg, sizeof(reg));
+        if (err <= 0) {
+                printk("VDEV: Cannot get \"reg\" "
+                       "property for OBP node %x\n", dev_node);
+                return 0;
+        }
+
+        for (i = 0; i < vdev_num_intmap; i++) {
+                if (vdev_intmap[i].phys == (reg & vdev_intmask.phys) &&
+                    vdev_intmap[i].irq == (irq & vdev_intmask.interrupt)) {
+                        irq = vdev_intmap[i].cinterrupt;
+                        break;
+                }
+        }
+
+        if (i == vdev_num_intmap) {
+                printk("VDEV: No matching interrupt map entry "
+                       "for OBP node %x\n", dev_node);
+                return 0;
+        }
+
+        return sun4v_build_irq(sun4v_vdev_devhandle, irq, 4, 0);
+}
+
 static const char *cpu_mid_prop(void)
 {
         if (tlb_type == spitfire)