![Michael Ellerman](/assets/img/avatar_default.png)
arch/powerpc/platforms/cell/ras.c still has DEBUG #defined, which is no longer necessary. Disable it - this disables two pr_debugs(). While we're there this file should have a copyright notice and license, so add both. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
281 lines
6.1 KiB
C
281 lines
6.1 KiB
C
/*
|
|
* Copyright 2006-2008, IBM Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/reboot.h>
|
|
|
|
#include <asm/reg.h>
|
|
#include <asm/io.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/cell-regs.h>
|
|
|
|
#include "ras.h"
|
|
|
|
|
|
static void dump_fir(int cpu)
|
|
{
|
|
struct cbe_pmd_regs __iomem *pregs = cbe_get_cpu_pmd_regs(cpu);
|
|
struct cbe_iic_regs __iomem *iregs = cbe_get_cpu_iic_regs(cpu);
|
|
|
|
if (pregs == NULL)
|
|
return;
|
|
|
|
/* Todo: do some nicer parsing of bits and based on them go down
|
|
* to other sub-units FIRs and not only IIC
|
|
*/
|
|
printk(KERN_ERR "Global Checkstop FIR : 0x%016lx\n",
|
|
in_be64(&pregs->checkstop_fir));
|
|
printk(KERN_ERR "Global Recoverable FIR : 0x%016lx\n",
|
|
in_be64(&pregs->checkstop_fir));
|
|
printk(KERN_ERR "Global MachineCheck FIR : 0x%016lx\n",
|
|
in_be64(&pregs->spec_att_mchk_fir));
|
|
|
|
if (iregs == NULL)
|
|
return;
|
|
printk(KERN_ERR "IOC FIR : 0x%016lx\n",
|
|
in_be64(&iregs->ioc_fir));
|
|
|
|
}
|
|
|
|
void cbe_system_error_exception(struct pt_regs *regs)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
|
|
printk(KERN_ERR "System Error Interrupt on CPU %d !\n", cpu);
|
|
dump_fir(cpu);
|
|
dump_stack();
|
|
}
|
|
|
|
void cbe_maintenance_exception(struct pt_regs *regs)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
|
|
/*
|
|
* Nothing implemented for the maintenance interrupt at this point
|
|
*/
|
|
|
|
printk(KERN_ERR "Unhandled Maintenance interrupt on CPU %d !\n", cpu);
|
|
dump_stack();
|
|
}
|
|
|
|
void cbe_thermal_exception(struct pt_regs *regs)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
|
|
/*
|
|
* Nothing implemented for the thermal interrupt at this point
|
|
*/
|
|
|
|
printk(KERN_ERR "Unhandled Thermal interrupt on CPU %d !\n", cpu);
|
|
dump_stack();
|
|
}
|
|
|
|
static int cbe_machine_check_handler(struct pt_regs *regs)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
|
|
printk(KERN_ERR "Machine Check Interrupt on CPU %d !\n", cpu);
|
|
dump_fir(cpu);
|
|
|
|
/* No recovery from this code now, lets continue */
|
|
return 0;
|
|
}
|
|
|
|
struct ptcal_area {
|
|
struct list_head list;
|
|
int nid;
|
|
int order;
|
|
struct page *pages;
|
|
};
|
|
|
|
static LIST_HEAD(ptcal_list);
|
|
|
|
static int ptcal_start_tok, ptcal_stop_tok;
|
|
|
|
static int __init cbe_ptcal_enable_on_node(int nid, int order)
|
|
{
|
|
struct ptcal_area *area;
|
|
int ret = -ENOMEM;
|
|
unsigned long addr;
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
rtas_call(ptcal_stop_tok, 1, 1, NULL, nid);
|
|
#endif
|
|
|
|
area = kmalloc(sizeof(*area), GFP_KERNEL);
|
|
if (!area)
|
|
goto out_err;
|
|
|
|
area->nid = nid;
|
|
area->order = order;
|
|
area->pages = alloc_pages_node(area->nid, GFP_KERNEL, area->order);
|
|
|
|
if (!area->pages)
|
|
goto out_free_area;
|
|
|
|
addr = __pa(page_address(area->pages));
|
|
|
|
ret = -EIO;
|
|
if (rtas_call(ptcal_start_tok, 3, 1, NULL, area->nid,
|
|
(unsigned int)(addr >> 32),
|
|
(unsigned int)(addr & 0xffffffff))) {
|
|
printk(KERN_ERR "%s: error enabling PTCAL on node %d!\n",
|
|
__FUNCTION__, nid);
|
|
goto out_free_pages;
|
|
}
|
|
|
|
list_add(&area->list, &ptcal_list);
|
|
|
|
return 0;
|
|
|
|
out_free_pages:
|
|
__free_pages(area->pages, area->order);
|
|
out_free_area:
|
|
kfree(area);
|
|
out_err:
|
|
return ret;
|
|
}
|
|
|
|
static int __init cbe_ptcal_enable(void)
|
|
{
|
|
const u32 *size;
|
|
struct device_node *np;
|
|
int order, found_mic = 0;
|
|
|
|
np = of_find_node_by_path("/rtas");
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
size = of_get_property(np, "ibm,cbe-ptcal-size", NULL);
|
|
if (!size)
|
|
return -ENODEV;
|
|
|
|
pr_debug("%s: enabling PTCAL, size = 0x%x\n", __FUNCTION__, *size);
|
|
order = get_order(*size);
|
|
of_node_put(np);
|
|
|
|
/* support for malta device trees, with be@/mic@ nodes */
|
|
for_each_node_by_type(np, "mic-tm") {
|
|
cbe_ptcal_enable_on_node(of_node_to_nid(np), order);
|
|
found_mic = 1;
|
|
}
|
|
|
|
if (found_mic)
|
|
return 0;
|
|
|
|
/* support for older device tree - use cpu nodes */
|
|
for_each_node_by_type(np, "cpu") {
|
|
const u32 *nid = of_get_property(np, "node-id", NULL);
|
|
if (!nid) {
|
|
printk(KERN_ERR "%s: node %s is missing node-id?\n",
|
|
__FUNCTION__, np->full_name);
|
|
continue;
|
|
}
|
|
cbe_ptcal_enable_on_node(*nid, order);
|
|
found_mic = 1;
|
|
}
|
|
|
|
return found_mic ? 0 : -ENODEV;
|
|
}
|
|
|
|
static int cbe_ptcal_disable(void)
|
|
{
|
|
struct ptcal_area *area, *tmp;
|
|
int ret = 0;
|
|
|
|
pr_debug("%s: disabling PTCAL\n", __FUNCTION__);
|
|
|
|
list_for_each_entry_safe(area, tmp, &ptcal_list, list) {
|
|
/* disable ptcal on this node */
|
|
if (rtas_call(ptcal_stop_tok, 1, 1, NULL, area->nid)) {
|
|
printk(KERN_ERR "%s: error disabling PTCAL "
|
|
"on node %d!\n", __FUNCTION__,
|
|
area->nid);
|
|
ret = -EIO;
|
|
continue;
|
|
}
|
|
|
|
/* ensure we can access the PTCAL area */
|
|
memset(page_address(area->pages), 0,
|
|
1 << (area->order + PAGE_SHIFT));
|
|
|
|
/* clean up */
|
|
list_del(&area->list);
|
|
__free_pages(area->pages, area->order);
|
|
kfree(area);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cbe_ptcal_notify_reboot(struct notifier_block *nb,
|
|
unsigned long code, void *data)
|
|
{
|
|
return cbe_ptcal_disable();
|
|
}
|
|
|
|
static struct notifier_block cbe_ptcal_reboot_notifier = {
|
|
.notifier_call = cbe_ptcal_notify_reboot
|
|
};
|
|
|
|
int __init cbe_ptcal_init(void)
|
|
{
|
|
int ret;
|
|
ptcal_start_tok = rtas_token("ibm,cbe-start-ptcal");
|
|
ptcal_stop_tok = rtas_token("ibm,cbe-stop-ptcal");
|
|
|
|
if (ptcal_start_tok == RTAS_UNKNOWN_SERVICE
|
|
|| ptcal_stop_tok == RTAS_UNKNOWN_SERVICE)
|
|
return -ENODEV;
|
|
|
|
ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier);
|
|
if (ret) {
|
|
printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
|
|
return ret;
|
|
}
|
|
|
|
return cbe_ptcal_enable();
|
|
}
|
|
|
|
arch_initcall(cbe_ptcal_init);
|
|
|
|
void __init cbe_ras_init(void)
|
|
{
|
|
unsigned long hid0;
|
|
|
|
/*
|
|
* Enable System Error & thermal interrupts and wakeup conditions
|
|
*/
|
|
|
|
hid0 = mfspr(SPRN_HID0);
|
|
hid0 |= HID0_CBE_THERM_INT_EN | HID0_CBE_THERM_WAKEUP |
|
|
HID0_CBE_SYSERR_INT_EN | HID0_CBE_SYSERR_WAKEUP;
|
|
mtspr(SPRN_HID0, hid0);
|
|
mb();
|
|
|
|
/*
|
|
* Install machine check handler. Leave setting of precise mode to
|
|
* what the firmware did for now
|
|
*/
|
|
ppc_md.machine_check_exception = cbe_machine_check_handler;
|
|
mb();
|
|
|
|
/*
|
|
* For now, we assume that IOC_FIR is already set to forward some
|
|
* error conditions to the System Error handler. If that is not true
|
|
* then it will have to be fixed up here.
|
|
*/
|
|
}
|