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Commit 47b5c838 authored by Linas Vepstas's avatar Linas Vepstas Committed by Paul Mackerras
Browse files

[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: default avatarLinas Vepstas <linas@austin.ibm.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent cb5b5624

arch/powerpc/platforms/pseries/eeh.c

+29 −0
Original line number Diff line number Diff line
@@ -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

include/asm-powerpc/ppc-pci.h

+11 −0
Original line number Diff line number Diff line
@@ -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

 *