Messages in this thread Patch in this message | | | Date | Thu, 3 Nov 2005 18:53:20 -0600 | From | Linas Vepstas <> | Subject | [PATCH 26/42]: ppc64: Add "partion endpoint" support |
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26-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-git3/arch/powerpc/platforms/pseries/eeh.c =================================================================== --- linux-2.6.14-git3.orig/arch/powerpc/platforms/pseries/eeh.c 2005-11-02 14:42:38.986155538 -0600 +++ linux-2.6.14-git3/arch/powerpc/platforms/pseries/eeh.c 2005-11-02 14:43:49.212307192 -0600 @@ -83,6 +83,7 @@ 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; @@ -457,6 +458,7 @@ 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 @@ 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 @@ 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 @@ 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-git3/include/asm-ppc64/pci-bridge.h =================================================================== --- linux-2.6.14-git3.orig/include/asm-ppc64/pci-bridge.h 2005-11-02 14:39:24.755392219 -0600 +++ linux-2.6.14-git3/include/asm-ppc64/pci-bridge.h 2005-11-02 14:43:49.218306351 -0600 @@ -63,6 +63,7 @@ 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 */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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