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spapr_pci: Introduce a liobn number generating macros 

We are going to have multiple DMA windows per PHB and we want them to
migrate so we need a predictable way of assigning LIOBNs.

This introduces a macro which makes up a LIOBN from fixed prefix,
PHB index (unique PHB id) and window number.

This introduces a SPAPR_PCI_DMA_WINDOW_NUM() to know the window number
from LIOBN. It is used to distinguish the default 32bit windows from
dynamic windows and avoid picking default DMA window properties from
a wrong TCE table.

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>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexey Kardashevskiy 2015-05-07 15:33:30 +10:00 committed by Alexander Graf
parent f1215ea702
commit c8545818b3
2 changed files with 5 additions and 3 deletions
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4
hw/ppc/spapr_pci.c
View File

@ -760,7 +760,7 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
}
sphb->buid = SPAPR_PCI_BASE_BUID + sphb->index;
sphb->dma_liobn = SPAPR_PCI_BASE_LIOBN + sphb->index;
sphb->dma_liobn = SPAPR_PCI_LIOBN(sphb->index, 0);
windows_base = SPAPR_PCI_WINDOW_BASE
+ sphb->index * SPAPR_PCI_WINDOW_SPACING;
@ -1101,7 +1101,7 @@ static int spapr_phb_children_dt(Object *child, void *opaque)
sPAPRTCETable *tcet;
tcet = (sPAPRTCETable *) object_dynamic_cast(child, TYPE_SPAPR_TCE_TABLE);
if (!tcet) {
if (!tcet || SPAPR_PCI_DMA_WINDOW_NUM(tcet->liobn)) {
return 0;
}

4
include/hw/ppc/spapr.h
View File

@ -482,7 +482,9 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
#define SPAPR_TCE_PAGE_MASK (SPAPR_TCE_PAGE_SIZE - 1)
#define SPAPR_VIO_BASE_LIOBN 0x00000000
#define SPAPR_PCI_BASE_LIOBN 0x80000000
#define SPAPR_PCI_LIOBN(phb_index, window_num) \
(0x80000000 | ((phb_index) << 8) | (window_num))
#define SPAPR_PCI_DMA_WINDOW_NUM(liobn) ((liobn) & 0xff)
#define RTAS_ERROR_LOG_MAX 2048