[PATCH 17/22] ppc64: New Partition Endpoin support

linas
2005-10-06T23:54:39Z

17-eeh-partition-endpoint.patch

New versions of firmware introduce a new method by which the
"partition endpoint" (the point at which the pci bus is cut).
This code adds the support for this (mandatory) new feature.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>

Index: linux-2.6.14-rc2-git6/arch/ppc64/kernel/eeh.c
===================================================================
--- linux-2.6.14-rc2-git6.orig/arch/ppc64/kernel/eeh.c 2005-10-06 17:56:42.936627345 -0500
+++ linux-2.6.14-rc2-git6/arch/ppc64/kernel/eeh.c 2005-10-06 17:56:46.221166493 -0500
@@ -84,6 +84,7 @@
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;

static int eeh_subsystem_enabled;

@@ -458,6 +459,7 @@
static void
rtas_pci_slot_reset(struct pci_dn *pdn, int state)
{
+ int config_addr;
int rc;

BUG_ON (pdn==NULL);
@@ -468,8 +470,13 @@
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);
@@ -696,8 +703,22 @@
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 {

@@ -749,6 +770,7 @@
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;
Index: linux-2.6.14-rc2-git6/include/asm-ppc64/pci-bridge.h
===================================================================
--- linux-2.6.14-rc2-git6.orig/include/asm-ppc64/pci-bridge.h 2005-10-06 17:54:00.310445328 -0500
+++ linux-2.6.14-rc2-git6/include/asm-ppc64/pci-bridge.h 2005-10-06 17:56:46.222166353 -0500
@@ -61,6 +61,7 @@
int devfn; /* for pci devices */
int eeh_mode; /* See eeh.h for possible EEH_MODEs */
int eeh_config_addr;
+ int eeh_pe_config_addr; /* new-style partition endpoint address */
int eeh_check_count; /* # times driver ignored error */
int eeh_freeze_count; /* # times this device froze up. */
int eeh_is_bridge; /* device is pci-to-pci bridge */