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ppc/pnv: Compute the PHB index from the PHB4 PEC model

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Use the num_stacks class attribute to compute the PHB index depending
on the PEC index :

  * PEC0 provides 1 PHB  (PHB0)
  * PEC1 provides 2 PHBs (PHB1 and PHB2)
  * PEC2 provides 3 PHBs (PHB3, PHB4 and PHB5)

The routine pnv_pec_phb_offset() is a bit complex but it also prepares
ground for PHB5 which has a different layout of stacks: 3 per PECs.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211213132830.108372-12-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Cédric Le Goater 2021-12-17 17:57:19 +01:00
parent cf0ee6955c
commit aa8cc84d88
2 changed files with 17 additions and 3 deletions
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16
hw/pci-host/pnv_phb4_pec.c
View File

@ -374,6 +374,19 @@ static void pnv_pec_instance_init(Object *obj)
}
}
static int pnv_pec_phb_offset(PnvPhb4PecState *pec)
{
PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
int index = pec->index;
int offset = 0;
while (index--) {
offset += pecc->num_stacks[index];
}
return offset;
}
static void pnv_pec_realize(DeviceState *dev, Error **errp)
{
PnvPhb4PecState *pec = PNV_PHB4_PEC(dev);
@ -394,8 +407,10 @@ static void pnv_pec_realize(DeviceState *dev, Error **errp)
for (i = 0; i < pec->num_stacks; i++) {
PnvPhb4PecStack *stack = &pec->stacks[i];
Object *stk_obj = OBJECT(stack);
int phb_id = pnv_pec_phb_offset(pec) + i;
object_property_set_int(stk_obj, "stack-no", i, &error_abort);
object_property_set_int(stk_obj, "phb-id", phb_id, &error_abort);
object_property_set_link(stk_obj, "pec", OBJECT(pec), &error_abort);
if (!qdev_realize(DEVICE(stk_obj), NULL, errp)) {
return;
@ -538,6 +553,7 @@ static void pnv_pec_stk_instance_init(Object *obj)
PnvPhb4PecStack *stack = PNV_PHB4_PEC_STACK(obj);
object_initialize_child(obj, "phb", &stack->phb, TYPE_PNV_PHB4);
object_property_add_alias(obj, "phb-id", OBJECT(&stack->phb), "index");
}
static void pnv_pec_stk_realize(DeviceState *dev, Error **errp)

4
hw/ppc/pnv.c
View File

@ -1384,7 +1384,6 @@ static void pnv_chip_power9_phb_realize(PnvChip *chip, Error **errp)
{
Pnv9Chip *chip9 = PNV9_CHIP(chip);
int i, j;
int phb_id = 0;
for (i = 0; i < chip->num_pecs; i++) {
PnvPhb4PecState *pec = &chip9->pecs[i];
@ -1409,11 +1408,10 @@ static void pnv_chip_power9_phb_realize(PnvChip *chip, Error **errp)
pnv_xscom_add_subregion(chip, pec_nest_base, &pec->nest_regs_mr);
pnv_xscom_add_subregion(chip, pec_pci_base, &pec->pci_regs_mr);
for (j = 0; j < pec->num_stacks; j++, phb_id++) {
for (j = 0; j < pec->num_stacks; j++) {
PnvPhb4PecStack *stack = &pec->stacks[j];
Object *obj = OBJECT(&stack->phb);
object_property_set_int(obj, "index", phb_id, &error_fatal);
object_property_set_int(obj, "chip-id", chip->chip_id,
&error_fatal);
object_property_set_int(obj, "version", pecc->version,