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spapr_pci: Add and export DMA resetting helper 

This will be later used by the "ibm,reset-pe-dma-window" RTAS handler
which resets the DMA configuration to the defaults.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Alexey Kardashevskiy 2016-06-01 18:57:39 +10:00 committed by David Gibson
parent acf1b6dd22
commit b3162f22cb
2 changed files with 10 additions and 2 deletions
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10
hw/ppc/spapr_pci.c
View File

@ -1485,9 +1485,8 @@ static int spapr_phb_children_reset(Object *child, void *opaque)
return 0; return 0;
} }
static void spapr_phb_reset(DeviceState *qdev) void spapr_phb_dma_reset(sPAPRPHBState *sphb)
{ {
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(qdev);
sPAPRTCETable *tcet = spapr_tce_find_by_liobn(sphb->dma_liobn); sPAPRTCETable *tcet = spapr_tce_find_by_liobn(sphb->dma_liobn);
if (tcet && tcet->nb_table) { if (tcet && tcet->nb_table) {
@ -1497,6 +1496,13 @@ static void spapr_phb_reset(DeviceState *qdev)
/* Register default 32bit DMA window */ /* Register default 32bit DMA window */
spapr_tce_table_enable(tcet, SPAPR_TCE_PAGE_SHIFT, sphb->dma_win_addr, spapr_tce_table_enable(tcet, SPAPR_TCE_PAGE_SHIFT, sphb->dma_win_addr,
sphb->dma_win_size >> SPAPR_TCE_PAGE_SHIFT); sphb->dma_win_size >> SPAPR_TCE_PAGE_SHIFT);
}
static void spapr_phb_reset(DeviceState *qdev)
{
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(qdev);
spapr_phb_dma_reset(sphb);
/* Reset the IOMMU state */ /* Reset the IOMMU state */
object_child_foreach(OBJECT(qdev), spapr_phb_children_reset, NULL); object_child_foreach(OBJECT(qdev), spapr_phb_children_reset, NULL);

2
include/hw/pci-host/spapr.h
View File

@ -147,4 +147,6 @@ static inline void spapr_phb_vfio_reset(DeviceState *qdev)
} }
#endif #endif
void spapr_phb_dma_reset(sPAPRPHBState *sphb);
#endif /* __HW_SPAPR_PCI_H__ */ #endif /* __HW_SPAPR_PCI_H__ */