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ppc/pnv: Introduce user creatable pnv-phb4 devices

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This patch introduces pnv-phb4 user creatable devices that are created
in a similar manner as pnv-phb3 devices, allowing the user to interact
with the PHBs directly instead of creating PCI Express Controllers that
will create a certain amount of PHBs per controller index.

We accomplish this by doing the following:

- add a pnv_phb4_get_stack() helper to retrieve which stack an user
created phb4 would occupy;

- when dealing with an user created pnv-phb4 (detected by checking if
phb->stack is NULL at the start of phb4_realize()), retrieve its stack
and initialize its properties as done in stk_realize();

- use 'defaults_enabled()' in stk_realize() to avoid creating and
initializing a 'stack->phb' qdev that might be overwritten by an user
created pnv-phb4 device. This process is wrapped into a new helper
called pnv_pec_stk_default_phb_realize().

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220111131027.599784-5-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Daniel Henrique Barboza 2022-01-12 11:28:27 +01:00 • committed by Cédric Le Goater
parent dc8e2914ab
commit 5bc67b052b
3 changed files with 89 additions and 4 deletions
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17
hw/pci-host/pnv_phb4_pec.c
View file

@ -19,6 +19,7 @@
#include "hw/pci/pci_bus.h"
#include "hw/ppc/pnv.h"
#include "hw/qdev-properties.h"
#include "sysemu/sysemu.h"
#include <libfdt.h>
@ -275,9 +276,9 @@ static const TypeInfo pnv_pec_type_info = {
}
};
static void pnv_pec_stk_realize(DeviceState *dev, Error **errp)
static void pnv_pec_stk_default_phb_realize(PnvPhb4PecStack *stack,
Error **errp)
{
PnvPhb4PecStack *stack = PNV_PHB4_PEC_STACK(dev);
PnvPhb4PecState *pec = stack->pec;
PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec);
int phb_id = pnv_phb4_pec_get_phb_id(pec, stack->stack_no);
@ -292,11 +293,23 @@ static void pnv_pec_stk_realize(DeviceState *dev, Error **errp)
&error_fatal);
object_property_set_link(OBJECT(stack->phb), "stack", OBJECT(stack),
&error_abort);
if (!sysbus_realize(SYS_BUS_DEVICE(stack->phb), errp)) {
return;
}
}
static void pnv_pec_stk_realize(DeviceState *dev, Error **errp)
{
PnvPhb4PecStack *stack = PNV_PHB4_PEC_STACK(dev);
if (!defaults_enabled()) {
return;
}
pnv_pec_stk_default_phb_realize(stack, errp);
}
static Property pnv_pec_stk_properties[] = {
DEFINE_PROP_UINT32("stack-no", PnvPhb4PecStack, stack_no, 0),
DEFINE_PROP_LINK("pec", PnvPhb4PecStack, pec, TYPE_PNV_PHB4_PEC,