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authorLinas Vepstas <linas@linas.org>2005-11-03 18:53:20 -0600
committerPaul Mackerras <paulus@samba.org>2006-01-10 15:29:14 +1100
commit25e591f6dd07365cbf0b1c2454386ce597dd5e05 (patch)
treec5b2709d6eb012dd2a0816f69b4bf9c7b56a887a /arch/powerpc
parent5d5a0936b3ad9e3d3f6eaf61f1a06c62ea0e7a59 (diff)
[PATCH] powerpc: Add "partitionable endpoint" support
26-eeh-partition-endpoint.patch New versions of firmware introduce a new method by which the "partitionable endpoint" (the point at which the pci bus is cut) should be located. This code adds the support for this (mandatory) new feature. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> (cherry picked from 9fcfb5d35b5294659f9299aa9cae6fd16325c07e commit)
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/pseries/eeh.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 57bef2c2f32..46ea4acd990 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -82,6 +82,7 @@ static int ibm_set_slot_reset;
static int ibm_read_slot_reset_state;
static int ibm_read_slot_reset_state2;
static int ibm_slot_error_detail;
+static int ibm_get_config_addr_info;
int eeh_subsystem_enabled;
EXPORT_SYMBOL(eeh_subsystem_enabled);
@@ -457,6 +458,7 @@ eeh_slot_availability(struct pci_dn *pdn)
static void
rtas_pci_slot_reset(struct pci_dn *pdn, int state)
{
+ int config_addr;
int rc;
BUG_ON (pdn==NULL);
@@ -467,8 +469,13 @@ rtas_pci_slot_reset(struct pci_dn *pdn, int state)
return;
}
+ /* Use PE configuration address, if present */
+ config_addr = pdn->eeh_config_addr;
+ if (pdn->eeh_pe_config_addr)
+ config_addr = pdn->eeh_pe_config_addr;
+
rc = rtas_call(ibm_set_slot_reset,4,1, NULL,
- pdn->eeh_config_addr,
+ config_addr,
BUID_HI(pdn->phb->buid),
BUID_LO(pdn->phb->buid),
state);
@@ -695,8 +702,22 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
eeh_subsystem_enabled = 1;
pdn->eeh_mode |= EEH_MODE_SUPPORTED;
pdn->eeh_config_addr = regs[0];
+
+ /* If the newer, better, ibm,get-config-addr-info is supported,
+ * then use that instead. */
+ pdn->eeh_pe_config_addr = 0;
+ if (ibm_get_config_addr_info != RTAS_UNKNOWN_SERVICE) {
+ unsigned int rets[2];
+ ret = rtas_call (ibm_get_config_addr_info, 4, 2, rets,
+ pdn->eeh_config_addr,
+ info->buid_hi, info->buid_lo,
+ 0);
+ if (ret == 0)
+ pdn->eeh_pe_config_addr = rets[0];
+ }
#ifdef DEBUG
- printk(KERN_DEBUG "EEH: %s: eeh enabled\n", dn->full_name);
+ printk(KERN_DEBUG "EEH: %s: eeh enabled, config=%x pe_config=%x\n",
+ dn->full_name, pdn->eeh_config_addr, pdn->eeh_pe_config_addr);
#endif
} else {
@@ -748,6 +769,7 @@ void __init eeh_init(void)
ibm_read_slot_reset_state2 = rtas_token("ibm,read-slot-reset-state2");
ibm_read_slot_reset_state = rtas_token("ibm,read-slot-reset-state");
ibm_slot_error_detail = rtas_token("ibm,slot-error-detail");
+ ibm_get_config_addr_info = rtas_token("ibm,get-config-addr-info");
if (ibm_set_eeh_option == RTAS_UNKNOWN_SERVICE)
return;