From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Andreas Färber" <afaerber@suse.de>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH RFC qom-next 4/4] pcie_port: Turn PCIEPort and PCIESlot into abstract QOM types
Date: Sun, 21 Jul 2013 23:26:07 +0300 [thread overview]
Message-ID: <20130721202607.GA15187@redhat.com> (raw)
In-Reply-To: <1374415744-6675-5-git-send-email-afaerber@suse.de>
On Sun, Jul 21, 2013 at 04:09:04PM +0200, Andreas Färber wrote:
> Signed-off-by: Andreas Färber <afaerber@suse.de>
> ---
> hw/pci-bridge/ioh3420.c | 23 ++++++++++-------------
> hw/pci-bridge/xio3130_downstream.c | 23 ++++++++++-------------
> hw/pci-bridge/xio3130_upstream.c | 15 +++++++--------
> hw/pci/pcie_port.c | 22 ++++++++++++++++++++++
> include/hw/pci/pcie_port.h | 14 ++++++++++++--
> 5 files changed, 61 insertions(+), 36 deletions(-)
>
> diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
> index 728f658..83db054 100644
> --- a/hw/pci-bridge/ioh3420.c
> +++ b/hw/pci-bridge/ioh3420.c
> @@ -92,9 +92,8 @@ static void ioh3420_reset(DeviceState *qdev)
>
> static int ioh3420_initfn(PCIDevice *d)
> {
> - PCIBridge *br = PCI_BRIDGE(d);
> - PCIEPort *p = DO_UPCAST(PCIEPort, br, br);
> - PCIESlot *s = DO_UPCAST(PCIESlot, port, p);
> + PCIEPort *p = PCIE_PORT(d);
> + PCIESlot *s = PCIE_SLOT(d);
> int rc;
>
> rc = pci_bridge_initfn(d, TYPE_PCIE_BUS);
> @@ -148,9 +147,7 @@ err_bridge:
>
> static void ioh3420_exitfn(PCIDevice *d)
> {
> - PCIBridge *br = PCI_BRIDGE(d);
> - PCIEPort *p = DO_UPCAST(PCIEPort, br, br);
> - PCIESlot *s = DO_UPCAST(PCIESlot, port, p);
> + PCIESlot *s = PCIE_SLOT(d);
>
> pcie_aer_exit(d);
> pcie_chassis_del_slot(s);
> @@ -180,7 +177,7 @@ PCIESlot *ioh3420_init(PCIBus *bus, int devfn, bool multifunction,
> qdev_prop_set_uint16(qdev, "slot", slot);
> qdev_init_nofail(qdev);
>
> - return DO_UPCAST(PCIESlot, port, DO_UPCAST(PCIEPort, br, br));
> + return PCIE_SLOT(d);
> }
>
> static const VMStateDescription vmstate_ioh3420 = {
> @@ -190,19 +187,19 @@ static const VMStateDescription vmstate_ioh3420 = {
> .minimum_version_id_old = 1,
> .post_load = pcie_cap_slot_post_load,
> .fields = (VMStateField[]) {
> - VMSTATE_PCIE_DEVICE(port.br.parent_obj, PCIESlot),
> - VMSTATE_STRUCT(port.br.parent_obj.exp.aer_log, PCIESlot, 0,
> + VMSTATE_PCIE_DEVICE(parent_obj, PCIBridge),
> + VMSTATE_STRUCT(exp.aer_log, PCIDevice, 0,
> vmstate_pcie_aer_log, PCIEAERLog),
> VMSTATE_END_OF_LIST()
> }
> };
>
> static Property ioh3420_properties[] = {
> - DEFINE_PROP_UINT8("port", PCIESlot, port.port, 0),
> + DEFINE_PROP_UINT8("port", PCIEPort, port, 0),
> DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0),
> DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0),
> - DEFINE_PROP_UINT16("aer_log_max", PCIESlot,
> - port.br.parent_obj.exp.aer_log.log_max,
> + DEFINE_PROP_UINT16("aer_log_max", PCIDevice,
> + exp.aer_log.log_max,
> PCIE_AER_LOG_MAX_DEFAULT),
> DEFINE_PROP_END_OF_LIST(),
> };
This looks scary. This does a cast to different types
without any checks at all.
What are the advantages of this hack?
> @@ -228,7 +225,7 @@ static void ioh3420_class_init(ObjectClass *klass, void *data)
>
> static const TypeInfo ioh3420_info = {
> .name = "ioh3420",
> - .parent = TYPE_PCI_BRIDGE,
> + .parent = TYPE_PCIE_SLOT,
> .instance_size = sizeof(PCIESlot),
> .class_init = ioh3420_class_init,
> };
> diff --git a/hw/pci-bridge/xio3130_downstream.c b/hw/pci-bridge/xio3130_downstream.c
> index 9acce3f..549ef26 100644
> --- a/hw/pci-bridge/xio3130_downstream.c
> +++ b/hw/pci-bridge/xio3130_downstream.c
> @@ -56,9 +56,8 @@ static void xio3130_downstream_reset(DeviceState *qdev)
>
> static int xio3130_downstream_initfn(PCIDevice *d)
> {
> - PCIBridge *br = PCI_BRIDGE(d);
> - PCIEPort *p = DO_UPCAST(PCIEPort, br, br);
> - PCIESlot *s = DO_UPCAST(PCIESlot, port, p);
> + PCIEPort *p = PCIE_PORT(d);
> + PCIESlot *s = PCIE_SLOT(d);
> int rc;
>
> rc = pci_bridge_initfn(d, TYPE_PCIE_BUS);
> @@ -113,9 +112,7 @@ err_bridge:
>
> static void xio3130_downstream_exitfn(PCIDevice *d)
> {
> - PCIBridge *br = PCI_BRIDGE(d);
> - PCIEPort *p = DO_UPCAST(PCIEPort, br, br);
> - PCIESlot *s = DO_UPCAST(PCIESlot, port, p);
> + PCIESlot *s = PCIE_SLOT(d);
>
> pcie_aer_exit(d);
> pcie_chassis_del_slot(s);
> @@ -147,7 +144,7 @@ PCIESlot *xio3130_downstream_init(PCIBus *bus, int devfn, bool multifunction,
> qdev_prop_set_uint16(qdev, "slot", slot);
> qdev_init_nofail(qdev);
>
> - return DO_UPCAST(PCIESlot, port, DO_UPCAST(PCIEPort, br, br));
> + return PCIE_SLOT(d);
> }
>
> static const VMStateDescription vmstate_xio3130_downstream = {
> @@ -157,19 +154,19 @@ static const VMStateDescription vmstate_xio3130_downstream = {
> .minimum_version_id_old = 1,
> .post_load = pcie_cap_slot_post_load,
> .fields = (VMStateField[]) {
> - VMSTATE_PCIE_DEVICE(port.br.parent_obj, PCIESlot),
> - VMSTATE_STRUCT(port.br.parent_obj.exp.aer_log, PCIESlot, 0,
> + VMSTATE_PCIE_DEVICE(parent_obj, PCIBridge),
> + VMSTATE_STRUCT(exp.aer_log, PCIDevice, 0,
> vmstate_pcie_aer_log, PCIEAERLog),
> VMSTATE_END_OF_LIST()
> }
> };
>
> static Property xio3130_downstream_properties[] = {
> - DEFINE_PROP_UINT8("port", PCIESlot, port.port, 0),
> + DEFINE_PROP_UINT8("port", PCIEPort, port, 0),
> DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0),
> DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0),
> - DEFINE_PROP_UINT16("aer_log_max", PCIESlot,
> - port.br.parent_obj.exp.aer_log.log_max,
> + DEFINE_PROP_UINT16("aer_log_max", PCIDevice,
> + exp.aer_log.log_max,
> PCIE_AER_LOG_MAX_DEFAULT),
> DEFINE_PROP_END_OF_LIST(),
> };
Same question.
> @@ -195,7 +192,7 @@ static void xio3130_downstream_class_init(ObjectClass *klass, void *data)
>
> static const TypeInfo xio3130_downstream_info = {
> .name = "xio3130-downstream",
> - .parent = TYPE_PCI_BRIDGE,
> + .parent = TYPE_PCIE_SLOT,
> .instance_size = sizeof(PCIESlot),
> .class_init = xio3130_downstream_class_init,
> };
> diff --git a/hw/pci-bridge/xio3130_upstream.c b/hw/pci-bridge/xio3130_upstream.c
> index 6bbcf98..b1ee464 100644
> --- a/hw/pci-bridge/xio3130_upstream.c
> +++ b/hw/pci-bridge/xio3130_upstream.c
> @@ -53,8 +53,7 @@ static void xio3130_upstream_reset(DeviceState *qdev)
>
> static int xio3130_upstream_initfn(PCIDevice *d)
> {
> - PCIBridge *br = PCI_BRIDGE(d);
> - PCIEPort *p = DO_UPCAST(PCIEPort, br, br);
> + PCIEPort *p = PCIE_PORT(d);
> int rc;
>
> rc = pci_bridge_initfn(d, TYPE_PCIE_BUS);
> @@ -125,7 +124,7 @@ PCIEPort *xio3130_upstream_init(PCIBus *bus, int devfn, bool multifunction,
> qdev_prop_set_uint8(qdev, "port", port);
> qdev_init_nofail(qdev);
>
> - return DO_UPCAST(PCIEPort, br, br);
> + return PCIE_PORT(d);
> }
>
> static const VMStateDescription vmstate_xio3130_upstream = {
> @@ -134,8 +133,8 @@ static const VMStateDescription vmstate_xio3130_upstream = {
> .minimum_version_id = 1,
> .minimum_version_id_old = 1,
> .fields = (VMStateField[]) {
> - VMSTATE_PCIE_DEVICE(br.parent_obj, PCIEPort),
> - VMSTATE_STRUCT(br.parent_obj.exp.aer_log, PCIEPort, 0,
> + VMSTATE_PCIE_DEVICE(parent_obj, PCIBridge),
> + VMSTATE_STRUCT(exp.aer_log, PCIDevice, 0,
> vmstate_pcie_aer_log, PCIEAERLog),
> VMSTATE_END_OF_LIST()
> }
> @@ -143,8 +142,8 @@ static const VMStateDescription vmstate_xio3130_upstream = {
>
> static Property xio3130_upstream_properties[] = {
> DEFINE_PROP_UINT8("port", PCIEPort, port, 0),
> - DEFINE_PROP_UINT16("aer_log_max", PCIEPort,
> - br.parent_obj.exp.aer_log.log_max,
> + DEFINE_PROP_UINT16("aer_log_max", PCIDevice,
> + exp.aer_log.log_max,
> PCIE_AER_LOG_MAX_DEFAULT),
> DEFINE_PROP_END_OF_LIST(),
> };
Same question.
> @@ -170,7 +169,7 @@ static void xio3130_upstream_class_init(ObjectClass *klass, void *data)
>
> static const TypeInfo xio3130_upstream_info = {
> .name = "x3130-upstream",
> - .parent = TYPE_PCI_BRIDGE,
> + .parent = TYPE_PCIE_PORT,
> .instance_size = sizeof(PCIEPort),
> .class_init = xio3130_upstream_class_init,
> };
> diff --git a/hw/pci/pcie_port.c b/hw/pci/pcie_port.c
> index 91b53a0..a5333a7 100644
> --- a/hw/pci/pcie_port.c
> +++ b/hw/pci/pcie_port.c
> @@ -116,3 +116,25 @@ void pcie_chassis_del_slot(PCIESlot *s)
> {
> QLIST_REMOVE(s, next);
> }
> +
> +static const TypeInfo pcie_port_type_info = {
> + .name = TYPE_PCIE_PORT,
> + .parent = TYPE_PCI_BRIDGE,
> + .instance_size = sizeof(PCIEPort),
> + .abstract = true,
> +};
> +
> +static const TypeInfo pcie_slot_type_info = {
> + .name = TYPE_PCIE_SLOT,
> + .parent = TYPE_PCIE_PORT,
> + .instance_size = sizeof(PCIESlot),
> + .abstract = true,
> +};
> +
> +static void pcie_port_register_types(void)
> +{
> + type_register_static(&pcie_port_type_info);
> + type_register_static(&pcie_slot_type_info);
> +}
> +
> +type_init(pcie_port_register_types)
> diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h
> index d89aa61..e167bf7 100644
> --- a/include/hw/pci/pcie_port.h
> +++ b/include/hw/pci/pcie_port.h
> @@ -24,8 +24,13 @@
> #include "hw/pci/pci_bridge.h"
> #include "hw/pci/pci_bus.h"
>
> +#define TYPE_PCIE_PORT "pcie-port"
> +#define PCIE_PORT(obj) OBJECT_CHECK(PCIEPort, (obj), TYPE_PCIE_PORT)
> +
> struct PCIEPort {
> - PCIBridge br;
> + /*< private >*/
> + PCIBridge parent_obj;
> + /*< public >*/
>
> /* pci express switch port */
> uint8_t port;
> @@ -33,8 +38,13 @@ struct PCIEPort {
>
> void pcie_port_init_reg(PCIDevice *d);
>
> +#define TYPE_PCIE_SLOT "pcie-slot"
> +#define PCIE_SLOT(obj) OBJECT_CHECK(PCIESlot, (obj), TYPE_PCIE_SLOT)
> +
> struct PCIESlot {
> - PCIEPort port;
> + /*< private >*/
> + PCIEPort parent_obj;
> + /*< public >*/
>
> /* pci express switch port with slot */
> uint8_t chassis;
> --
> 1.8.1.4
next prev parent reply other threads:[~2013-07-21 20:24 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-21 14:09 [Qemu-devel] [PATCH RFC qom-next 0/4] QOM'ification of pci-bridge types Andreas Färber
2013-07-21 14:09 ` [Qemu-devel] [PATCH RFC qom-next 1/4] pci-bridge: Turn into abstract QOM type Andreas Färber
2013-07-21 14:09 ` [Qemu-devel] [PATCH RFC qom-next 2/4] pci-bridge-dev: QOM parent field cleanup Andreas Färber
2013-07-21 14:09 ` [Qemu-devel] [PATCH RFC qom-next 3/4] pci-bridge/i82801b11: Rename parent field Andreas Färber
2013-07-21 14:09 ` [Qemu-devel] [PATCH RFC qom-next 4/4] pcie_port: Turn PCIEPort and PCIESlot into abstract QOM types Andreas Färber
2013-07-21 20:26 ` Michael S. Tsirkin [this message]
2013-07-22 17:42 ` Andreas Färber
2013-07-22 19:34 ` Michael S. Tsirkin
2013-07-22 20:29 ` Anthony Liguori
2013-07-22 21:04 ` Andreas Färber
2013-07-23 7:07 ` Michael S. Tsirkin
2013-07-23 9:10 ` Andreas Färber
2013-07-23 9:59 ` Michael S. Tsirkin
2013-07-23 10:21 ` Andreas Färber
2013-07-23 11:21 ` Gerd Hoffmann
2013-07-23 12:35 ` Michael S. Tsirkin
2013-07-23 7:04 ` Michael S. Tsirkin
2013-07-28 12:36 ` Andreas Färber
2013-07-28 12:58 ` Michael S. Tsirkin
2013-07-21 20:26 ` [Qemu-devel] [PATCH RFC qom-next 0/4] QOM'ification of pci-bridge types Michael S. Tsirkin
2013-07-22 17:22 ` Andreas Färber
2013-07-22 22:05 ` Andreas Färber
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