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[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 <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Linas Vepstas 2006-09-15 18:57:42 -05:00 committed by Paul Mackerras
parent cb5b562444
commit 47b5c838af
2 changed files with 40 additions and 0 deletions
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29
arch/powerpc/platforms/pseries/eeh.c
View File

@ -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

11
include/asm-powerpc/ppc-pci.h
View File

@ -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
*