From 47b5c838af92d3504e99633bf568578203b7305f Mon Sep 17 00:00:00 2001 From: Linas Vepstas Date: Fri, 15 Sep 2006 18:57:42 -0500 Subject: [PATCH] [POWERPC] EEH: enable MMIO/DMA on frozen slot Add wrapper around the rtas call to enable MMIO or DMA on a frozen pci slot. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras --- arch/powerpc/platforms/pseries/eeh.c | 29 ++++++++++++++++++++++++++++ include/asm-powerpc/ppc-pci.h | 11 +++++++++++ 2 files changed, 40 insertions(+) diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c index fb91842fc8..4534886e3b 100644 --- a/arch/powerpc/platforms/pseries/eeh.c +++ b/arch/powerpc/platforms/pseries/eeh.c @@ -481,6 +481,35 @@ eeh_slot_availability(struct pci_dn *pdn) return -1; } +/** + * rtas_pci_enable - enable MMIO or DMA transfers for this slot + * @pdn pci device node + */ + +int +rtas_pci_enable(struct pci_dn *pdn, int function) +{ + int config_addr; + int rc; + + /* 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_eeh_option, 4, 1, NULL, + config_addr, + BUID_HI(pdn->phb->buid), + BUID_LO(pdn->phb->buid), + function); + + if (rc) + printk(KERN_WARNING "EEH: Cannot enable function %d, err=%d dn=%s\n", + function, rc, pdn->node->full_name); + + return rc; +} + /** * rtas_pci_slot_reset - raises/lowers the pci #RST line * @pdn pci device node diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h index cf79bc7ebb..1115756c79 100644 --- a/include/asm-powerpc/ppc-pci.h +++ b/include/asm-powerpc/ppc-pci.h @@ -68,6 +68,17 @@ struct pci_dev *pci_get_device_by_addr(unsigned long addr); */ void eeh_slot_error_detail (struct pci_dn *pdn, int severity); +/** + * rtas_pci_enableo - enable IO transfers for this slot + * @pdn: pci device node + * @function: either EEH_THAW_MMIO or EEH_THAW_DMA + * + * Enable I/O transfers to this slot + */ +#define EEH_THAW_MMIO 2 +#define EEH_THAW_DMA 3 +int rtas_pci_enable(struct pci_dn *pdn, int function); + /** * rtas_set_slot_reset -- unfreeze a frozen slot * -- 2.39.2