xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[SPARC64]: Decode virtual-devices interrupts correctly.

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

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-15 19:48:54 -08:00
parent 7890f794e0
commit 9d29a3fafd
3 changed files with 92 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

98
arch/sparc64/kernel/devices.c
View File

@@ -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)