| Message ID | 20191018150630.31099-9-damien.hedde@greensocs.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Multi-phase reset mechanism | expand |
On 10/18/19 5:06 PM, Damien Hedde wrote: > Deprecate device_legacy_reset(), qdev_reset_all() and > qbus_reset_all() to be replaced by new functions > device_cold_reset() and bus_cold_reset() which uses resettable API. > > Also introduce resettable_cold_reset_fn() which may be used as a > replacement for qdev_reset_all_fn and qbus_reset_all_fn(). > > Following patches will be needed to look at legacy reset call sites > and switch to resettable api. The legacy functions will be removed > when unused. > > Signed-off-by: Damien Hedde <damien.hedde@greensocs.com> > --- > > I've removed the general helpers > + device_reset(DeviceState *dev, ResetType type) > + bus_reset(BusState *dev, ResetType type) > because with several reset types, all devices and buses will not > implement all of them. I think it is preferable to define a > type-specific helper every time it is needed for base classes > implementing the reset type (eg a device_pci_reset(PciDev*) for the > pci reset type if add that). Agreed. > So device_reset()/bus_reset() symbol names are not taken anymore. I > don't have a strong opinion of what names should have the > device_cold_reset() and bus_cold_reset() function added in this > patch. It could be device/bus_hard_reset() (the current > qbus_reset_all() comment mention we do a "hard" reset) or simply > device/bus_reset() or anything else. > What do you think ? Any better idea ? It should be consistent with > the reset type name but we can change it also if cold is not what we > want. Cold/hot are self-illustrative so seems fine. Hard/soft are used in electronic but less in software I'd say. > Note that if we don't settle for device/bus_reset(). We can drop > the first patch that renames device_reset() to device_legacy_reset() > --- > hw/core/bus.c | 5 +++++ > hw/core/qdev.c | 5 +++++ > hw/core/resettable.c | 5 +++++ > include/hw/qdev-core.h | 27 +++++++++++++++++++++++++++ > include/hw/resettable.h | 9 +++++++++ > 5 files changed, 51 insertions(+) > > diff --git a/hw/core/bus.c b/hw/core/bus.c > index 7c05e80db8..5f9e261bb2 100644 > --- a/hw/core/bus.c > +++ b/hw/core/bus.c > @@ -68,6 +68,11 @@ int qbus_walk_children(BusState *bus, > return 0; > } > > +void bus_cold_reset(BusState *bus) > +{ > + resettable_reset(OBJECT(bus), RESET_TYPE_COLD); > +} > + > bool bus_is_in_reset(BusState *bus) > { > return resettable_is_in_reset(OBJECT(bus)); > diff --git a/hw/core/qdev.c b/hw/core/qdev.c > index c5d107ea4e..3e6600ce76 100644 > --- a/hw/core/qdev.c > +++ b/hw/core/qdev.c > @@ -335,6 +335,11 @@ void qbus_reset_all_fn(void *opaque) > qbus_reset_all(bus); > } > > +void device_cold_reset(DeviceState *dev) > +{ > + resettable_reset(OBJECT(dev), RESET_TYPE_COLD); > +} > + > bool device_is_in_reset(DeviceState *dev) > { > return resettable_is_in_reset(OBJECT(dev)); > diff --git a/hw/core/resettable.c b/hw/core/resettable.c > index 60d4285fcc..3d3200bdbc 100644 > --- a/hw/core/resettable.c > +++ b/hw/core/resettable.c > @@ -252,6 +252,11 @@ void resettable_change_parent(Object *obj, Object *newp, Object *oldp) > } > } > > +void resettable_cold_reset_fn(void *opaque) > +{ > + resettable_reset((Object *) opaque, RESET_TYPE_COLD); Why not take a Object* argument? > +} > + > void resettable_class_set_parent_phases(ResettableClass *rc, > ResettableEnterPhase enter, > ResettableHoldPhase hold, > diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h > index 2e3346600e..1e88cb2f6a 100644 > --- a/include/hw/qdev-core.h > +++ b/include/hw/qdev-core.h > @@ -386,6 +386,13 @@ int qdev_walk_children(DeviceState *dev, > qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn, > void *opaque); > > +/** > + * @qdev_reset_all: > + * Reset @dev. See @qbus_reset_all() for more details. > + * > + * Note: This function is deprecated and will be removed when it becomes unused. > + * Please use device_cold_reset() now. > + */ > void qdev_reset_all(DeviceState *dev); > void qdev_reset_all_fn(void *opaque); > > @@ -398,10 +405,28 @@ void qdev_reset_all_fn(void *opaque); > * hard reset means that qbus_reset_all will reset all state of the device. > * For PCI devices, for example, this will include the base address registers > * or configuration space. > + * > + * Note: This function is deprecated and will be removed when it becomes unused. > + * Please use bus_cold_reset() now. > */ > void qbus_reset_all(BusState *bus); > void qbus_reset_all_fn(void *opaque); > > +/** > + * device_cold_reset: > + * Reset device @dev and perform a recursive processing using the resettable > + * interface. It triggers a RESET_TYPE_COLD. > + */ > +void device_cold_reset(DeviceState *dev); > + > +/** > + * bus_cold_reset: > + * > + * Reset bus @bus and perform a recursive processing using the resettable > + * interface. It triggers a RESET_TYPE_COLD. > + */ > +void bus_cold_reset(BusState *bus); > + > /** > * device_is_in_reset: > * Return true if the device @dev is currently being reset. > @@ -432,6 +457,8 @@ void qdev_machine_init(void); > * device_legacy_reset: > * > * Reset a single device (by calling the reset method). > + * Note: This function is deprecated and will be removed when it becomes unused. > + * Please use device_cold_reset() now. > */ > void device_legacy_reset(DeviceState *dev); > > diff --git a/include/hw/resettable.h b/include/hw/resettable.h > index f6d379669f..6a9e17344e 100644 > --- a/include/hw/resettable.h > +++ b/include/hw/resettable.h > @@ -198,6 +198,15 @@ bool resettable_is_in_reset(Object *obj); > */ > void resettable_change_parent(Object *obj, Object *newp, Object *oldp); > > +/** > + * resettable_cold_reset_fn: > + * Helper to call resettable_reset((Object *) opaque, RESET_TYPE_COLD). > + * > + * This function is typically useful to register a reset handler with > + * qemu_register_reset. > + */ > +void resettable_cold_reset_fn(void *opaque); > + > /** > * resettable_class_set_parent_phases: > * >
On 11/1/19 12:35 AM, Philippe Mathieu-Daudé wrote: > On 10/18/19 5:06 PM, Damien Hedde wrote: >> Deprecate device_legacy_reset(), qdev_reset_all() and >> qbus_reset_all() to be replaced by new functions >> device_cold_reset() and bus_cold_reset() which uses resettable API. >> >> Also introduce resettable_cold_reset_fn() which may be used as a >> replacement for qdev_reset_all_fn and qbus_reset_all_fn(). >> >> Following patches will be needed to look at legacy reset call sites >> and switch to resettable api. The legacy functions will be removed >> when unused. >> >> Signed-off-by: Damien Hedde <damien.hedde@greensocs.com> >> --- >> [...]>> +void resettable_cold_reset_fn(void *opaque) >> +{ >> + resettable_reset((Object *) opaque, RESET_TYPE_COLD); > > Why not take a Object* argument? This function is used to register a reset callback with qemu_register_reset() (path 10 and 11), so we need void* to match the prototype.
On 11/4/19 1:01 PM, Damien Hedde wrote: > On 11/1/19 12:35 AM, Philippe Mathieu-Daudé wrote: >> On 10/18/19 5:06 PM, Damien Hedde wrote: >>> Deprecate device_legacy_reset(), qdev_reset_all() and >>> qbus_reset_all() to be replaced by new functions >>> device_cold_reset() and bus_cold_reset() which uses resettable API. >>> >>> Also introduce resettable_cold_reset_fn() which may be used as a >>> replacement for qdev_reset_all_fn and qbus_reset_all_fn(). >>> >>> Following patches will be needed to look at legacy reset call sites >>> and switch to resettable api. The legacy functions will be removed >>> when unused. >>> >>> Signed-off-by: Damien Hedde <damien.hedde@greensocs.com> >>> --- >>> [...]>> +void resettable_cold_reset_fn(void *opaque) >>> +{ >>> + resettable_reset((Object *) opaque, RESET_TYPE_COLD); >> >> Why not take a Object* argument? > > This function is used to register a reset callback with > qemu_register_reset() (path 10 and 11), so we need void* to match the > prototype. Alright. Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
On Fri, 18 Oct 2019 at 16:07, Damien Hedde <damien.hedde@greensocs.com> wrote: > > Deprecate device_legacy_reset(), qdev_reset_all() and > qbus_reset_all() to be replaced by new functions > device_cold_reset() and bus_cold_reset() which uses resettable API. > > Also introduce resettable_cold_reset_fn() which may be used as a > replacement for qdev_reset_all_fn and qbus_reset_all_fn(). > > Following patches will be needed to look at legacy reset call sites > and switch to resettable api. The legacy functions will be removed > when unused. > > Signed-off-by: Damien Hedde <damien.hedde@greensocs.com> > --- > > I've removed the general helpers > + device_reset(DeviceState *dev, ResetType type) > + bus_reset(BusState *dev, ResetType type) > because with several reset types, all devices and buses will not > implement all of them. I think it is preferable to define a > type-specific helper every time it is needed for base classes > implementing the reset type (eg a device_pci_reset(PciDev*) for the > pci reset type if add that). > > So device_reset()/bus_reset() symbol names are not taken anymore. I > don't have a strong opinion of what names should have the > device_cold_reset() and bus_cold_reset() function added in this > patch. It could be device/bus_hard_reset() (the current > qbus_reset_all() comment mention we do a "hard" reset) or simply > device/bus_reset() or anything else. > What do you think ? Any better idea ? It should be consistent with > the reset type name but we can change it also if cold is not what we > want. > > Note that if we don't settle for device/bus_reset(). We can drop > the first patch that renames device_reset() to device_legacy_reset() I think we're good the way you have things in this patchset. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> thanks -- PMM
diff --git a/hw/core/bus.c b/hw/core/bus.c index 7c05e80db8..5f9e261bb2 100644 --- a/hw/core/bus.c +++ b/hw/core/bus.c @@ -68,6 +68,11 @@ int qbus_walk_children(BusState *bus, return 0; } +void bus_cold_reset(BusState *bus) +{ + resettable_reset(OBJECT(bus), RESET_TYPE_COLD); +} + bool bus_is_in_reset(BusState *bus) { return resettable_is_in_reset(OBJECT(bus)); diff --git a/hw/core/qdev.c b/hw/core/qdev.c index c5d107ea4e..3e6600ce76 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -335,6 +335,11 @@ void qbus_reset_all_fn(void *opaque) qbus_reset_all(bus); } +void device_cold_reset(DeviceState *dev) +{ + resettable_reset(OBJECT(dev), RESET_TYPE_COLD); +} + bool device_is_in_reset(DeviceState *dev) { return resettable_is_in_reset(OBJECT(dev)); diff --git a/hw/core/resettable.c b/hw/core/resettable.c index 60d4285fcc..3d3200bdbc 100644 --- a/hw/core/resettable.c +++ b/hw/core/resettable.c @@ -252,6 +252,11 @@ void resettable_change_parent(Object *obj, Object *newp, Object *oldp) } } +void resettable_cold_reset_fn(void *opaque) +{ + resettable_reset((Object *) opaque, RESET_TYPE_COLD); +} + void resettable_class_set_parent_phases(ResettableClass *rc, ResettableEnterPhase enter, ResettableHoldPhase hold, diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index 2e3346600e..1e88cb2f6a 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -386,6 +386,13 @@ int qdev_walk_children(DeviceState *dev, qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn, void *opaque); +/** + * @qdev_reset_all: + * Reset @dev. See @qbus_reset_all() for more details. + * + * Note: This function is deprecated and will be removed when it becomes unused. + * Please use device_cold_reset() now. + */ void qdev_reset_all(DeviceState *dev); void qdev_reset_all_fn(void *opaque); @@ -398,10 +405,28 @@ void qdev_reset_all_fn(void *opaque); * hard reset means that qbus_reset_all will reset all state of the device. * For PCI devices, for example, this will include the base address registers * or configuration space. + * + * Note: This function is deprecated and will be removed when it becomes unused. + * Please use bus_cold_reset() now. */ void qbus_reset_all(BusState *bus); void qbus_reset_all_fn(void *opaque); +/** + * device_cold_reset: + * Reset device @dev and perform a recursive processing using the resettable + * interface. It triggers a RESET_TYPE_COLD. + */ +void device_cold_reset(DeviceState *dev); + +/** + * bus_cold_reset: + * + * Reset bus @bus and perform a recursive processing using the resettable + * interface. It triggers a RESET_TYPE_COLD. + */ +void bus_cold_reset(BusState *bus); + /** * device_is_in_reset: * Return true if the device @dev is currently being reset. @@ -432,6 +457,8 @@ void qdev_machine_init(void); * device_legacy_reset: * * Reset a single device (by calling the reset method). + * Note: This function is deprecated and will be removed when it becomes unused. + * Please use device_cold_reset() now. */ void device_legacy_reset(DeviceState *dev); diff --git a/include/hw/resettable.h b/include/hw/resettable.h index f6d379669f..6a9e17344e 100644 --- a/include/hw/resettable.h +++ b/include/hw/resettable.h @@ -198,6 +198,15 @@ bool resettable_is_in_reset(Object *obj); */ void resettable_change_parent(Object *obj, Object *newp, Object *oldp); +/** + * resettable_cold_reset_fn: + * Helper to call resettable_reset((Object *) opaque, RESET_TYPE_COLD). + * + * This function is typically useful to register a reset handler with + * qemu_register_reset. + */ +void resettable_cold_reset_fn(void *opaque); + /** * resettable_class_set_parent_phases: *
Deprecate device_legacy_reset(), qdev_reset_all() and qbus_reset_all() to be replaced by new functions device_cold_reset() and bus_cold_reset() which uses resettable API. Also introduce resettable_cold_reset_fn() which may be used as a replacement for qdev_reset_all_fn and qbus_reset_all_fn(). Following patches will be needed to look at legacy reset call sites and switch to resettable api. The legacy functions will be removed when unused. Signed-off-by: Damien Hedde <damien.hedde@greensocs.com> --- I've removed the general helpers + device_reset(DeviceState *dev, ResetType type) + bus_reset(BusState *dev, ResetType type) because with several reset types, all devices and buses will not implement all of them. I think it is preferable to define a type-specific helper every time it is needed for base classes implementing the reset type (eg a device_pci_reset(PciDev*) for the pci reset type if add that). So device_reset()/bus_reset() symbol names are not taken anymore. I don't have a strong opinion of what names should have the device_cold_reset() and bus_cold_reset() function added in this patch. It could be device/bus_hard_reset() (the current qbus_reset_all() comment mention we do a "hard" reset) or simply device/bus_reset() or anything else. What do you think ? Any better idea ? It should be consistent with the reset type name but we can change it also if cold is not what we want. Note that if we don't settle for device/bus_reset(). We can drop the first patch that renames device_reset() to device_legacy_reset() --- hw/core/bus.c | 5 +++++ hw/core/qdev.c | 5 +++++ hw/core/resettable.c | 5 +++++ include/hw/qdev-core.h | 27 +++++++++++++++++++++++++++ include/hw/resettable.h | 9 +++++++++ 5 files changed, 51 insertions(+)