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ppc/pnv: assign pnv-phb-root-port chassis/slot earlier

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It is not advisable to execute an object_dynamic_cast() to poke into
bus->qbus.parent and follow it up with a C cast into the PnvPHB type we
think we got.

In fact this is not needed. There is nothing sophisticated being done
with the PHB object retrieved during root_port_realize() for both PHB3
and PHB4. We're retrieving a PHB reference just to access phb->chip_id
and phb->phb_id and use them to define the chassis/slot of the root
port.

phb->phb_id is already being passed to pnv_phb_attach_root_port() via
the 'index' parameter. Let's also add a 'chip_id' parameter to this
function and assign chassis and slot right there. This will spare us
from the hassle of accessing the PHB object inside realize().

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220621173436.165912-4-danielhb413@gmail.com>
This commit is contained in:
Daniel Henrique Barboza 2022-06-21 14:34:31 -03:00
parent 8625164a38
commit 792e8bb629
4 changed files with 19 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
hw/pci-host/pnv_phb3.c
View File

@ -1052,7 +1052,8 @@ static void pnv_phb3_realize(DeviceState *dev, Error **errp)
pci_setup_iommu(pci->bus, pnv_phb3_dma_iommu, phb);
pnv_phb_attach_root_port(pci, TYPE_PNV_PHB3_ROOT_PORT, phb->phb_id);
pnv_phb_attach_root_port(pci, TYPE_PNV_PHB3_ROOT_PORT,
phb->phb_id, phb->chip_id);
}
void pnv_phb3_update_regions(PnvPHB3 *phb)
@ -1139,23 +1140,8 @@ static void pnv_phb3_root_port_realize(DeviceState *dev, Error **errp)
{
PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(dev);
PCIDevice *pci = PCI_DEVICE(dev);
PCIBus *bus = pci_get_bus(pci);
PnvPHB3 *phb = NULL;
Error *local_err = NULL;
phb = (PnvPHB3 *) object_dynamic_cast(OBJECT(bus->qbus.parent),
TYPE_PNV_PHB3);
if (!phb) {
error_setg(errp,
"pnv_phb3_root_port devices must be connected to pnv-phb3 buses");
return;
}
/* Set unique chassis/slot values for the root port */
qdev_prop_set_uint8(&pci->qdev, "chassis", phb->chip_id);
qdev_prop_set_uint16(&pci->qdev, "slot", phb->phb_id);
rpc->parent_realize(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);

18
hw/pci-host/pnv_phb4.c
View File

@ -1585,7 +1585,8 @@ static void pnv_phb4_realize(DeviceState *dev, Error **errp)
pci->bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE;
/* Add a single Root port if running with defaults */
pnv_phb_attach_root_port(pci, pecc->rp_model, phb->phb_id);
pnv_phb_attach_root_port(pci, pecc->rp_model,
phb->phb_id, phb->chip_id);
/* Setup XIVE Source */
if (phb->big_phb) {
@ -1781,23 +1782,8 @@ static void pnv_phb4_root_port_reset(DeviceState *dev)
static void pnv_phb4_root_port_realize(DeviceState *dev, Error **errp)
{
PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(dev);
PCIDevice *pci = PCI_DEVICE(dev);
PCIBus *bus = pci_get_bus(pci);
PnvPHB4 *phb = NULL;
Error *local_err = NULL;
phb = (PnvPHB4 *) object_dynamic_cast(OBJECT(bus->qbus.parent),
TYPE_PNV_PHB4);
if (!phb) {
error_setg(errp, "%s must be connected to pnv-phb4 buses", dev->id);
return;
}
/* Set unique chassis/slot values for the root port */
qdev_prop_set_uint8(&pci->qdev, "chassis", phb->chip_id);
qdev_prop_set_uint16(&pci->qdev, "slot", phb->phb_id);
rpc->parent_realize(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);

15
hw/ppc/pnv.c
View File

@ -1189,8 +1189,15 @@ static void pnv_chip_icp_realize(Pnv8Chip *chip8, Error **errp)
}
}
/* Attach a root port device */
void pnv_phb_attach_root_port(PCIHostState *pci, const char *name, int index)
/*
* Attach a root port device.
*
* 'index' will be used both as a PCIE slot value and to calculate
* QOM id. 'chip_id' is going to be used as PCIE chassis for the
* root port.
*/
void pnv_phb_attach_root_port(PCIHostState *pci, const char *name,
int index, int chip_id)
{
PCIDevice *root = pci_new(PCI_DEVFN(0, 0), name);
g_autofree char *default_id = g_strdup_printf("%s[%d]", name, index);
@ -1199,6 +1206,10 @@ void pnv_phb_attach_root_port(PCIHostState *pci, const char *name, int index)
object_property_add_child(OBJECT(pci->bus), dev_id ? dev_id : default_id,
OBJECT(root));
/* Set unique chassis/slot values for the root port */
qdev_prop_set_uint8(DEVICE(root), "chassis", chip_id);
qdev_prop_set_uint16(DEVICE(root), "slot", index);
pci_realize_and_unref(root, pci->bus, &error_fatal);
}

3
include/hw/ppc/pnv.h
View File

@ -189,7 +189,8 @@ DECLARE_INSTANCE_CHECKER(PnvChip, PNV_CHIP_POWER10,
TYPE_PNV_CHIP_POWER10)
PowerPCCPU *pnv_chip_find_cpu(PnvChip *chip, uint32_t pir);
void pnv_phb_attach_root_port(PCIHostState *pci, const char *name, int index);
void pnv_phb_attach_root_port(PCIHostState *pci, const char *name,
int index, int chip_id);
#define TYPE_PNV_MACHINE MACHINE_TYPE_NAME("powernv")
typedef struct PnvMachineClass PnvMachineClass;