The abstract PCMCIA_CARD is a bus-less TYPE_DEVICE, so devices
implementing it are not reset automatically.
Register a reset handler so children get reset on machine reset.

Note, the DSCM-1XXXX device (TYPE_DSCM1XXXX) which inherits
TYPE_MICRODRIVE and PCMCIA_CARD reset itself when a disk is
attached or detached, but was not resetting itself on machine
reset.

It doesn't seem to be an issue because it is that way since the
device QDev'ifycation 8 years ago, in commit d1f2c96a81a
("pcmcia: QOM'ify PCMCIACardState and MicroDriveState").
Still, correct to have a proper API usage.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/pcmcia/pcmcia.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/hw/pcmcia/pcmcia.c b/hw/pcmcia/pcmcia.c
index 03d13e7d670..73656257227 100644
--- a/hw/pcmcia/pcmcia.c
+++ b/hw/pcmcia/pcmcia.c
@@ -6,14 +6,39 @@
 
 #include "qemu/osdep.h"
 #include "qemu/module.h"
+#include "sysemu/reset.h"
 #include "hw/pcmcia.h"
 
+static void pcmcia_card_reset_handler(void *dev)
+{
+    device_legacy_reset(DEVICE(dev));
+}
+
+static void pcmcia_card_realize(DeviceState *dev, Error **errp)
+{
+    qemu_register_reset(pcmcia_card_reset_handler, dev);
+}
+
+static void pcmcia_card_unrealize(DeviceState *dev)
+{
+    qemu_unregister_reset(pcmcia_card_reset_handler, dev);
+}
+
+static void pcmcia_card_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = pcmcia_card_realize;
+    dc->unrealize = pcmcia_card_unrealize;
+}
+
 static const TypeInfo pcmcia_card_type_info = {
     .name = TYPE_PCMCIA_CARD,
     .parent = TYPE_DEVICE,
     .instance_size = sizeof(PCMCIACardState),
     .abstract = true,
     .class_size = sizeof(PCMCIACardClass),
+    .class_init = pcmcia_card_class_init,
 };
 
 static void pcmcia_register_types(void)
-- 
2.26.3

On Sat, 24 Apr 2021 at 17:22, Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
>
> The abstract PCMCIA_CARD is a bus-less TYPE_DEVICE, so devices
> implementing it are not reset automatically.
> Register a reset handler so children get reset on machine reset.
>
> Note, the DSCM-1XXXX device (TYPE_DSCM1XXXX) which inherits
> TYPE_MICRODRIVE and PCMCIA_CARD reset itself when a disk is
> attached or detached, but was not resetting itself on machine
> reset.
>
> It doesn't seem to be an issue because it is that way since the
> device QDev'ifycation 8 years ago, in commit d1f2c96a81a
> ("pcmcia: QOM'ify PCMCIACardState and MicroDriveState").
> Still, correct to have a proper API usage.
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  hw/pcmcia/pcmcia.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/hw/pcmcia/pcmcia.c b/hw/pcmcia/pcmcia.c
> index 03d13e7d670..73656257227 100644
> --- a/hw/pcmcia/pcmcia.c
> +++ b/hw/pcmcia/pcmcia.c
> @@ -6,14 +6,39 @@
>
>  #include "qemu/osdep.h"
>  #include "qemu/module.h"
> +#include "sysemu/reset.h"
>  #include "hw/pcmcia.h"
>
> +static void pcmcia_card_reset_handler(void *dev)
> +{
> +    device_legacy_reset(DEVICE(dev));
> +}
> +
> +static void pcmcia_card_realize(DeviceState *dev, Error **errp)
> +{
> +    qemu_register_reset(pcmcia_card_reset_handler, dev);
> +}
> +
> +static void pcmcia_card_unrealize(DeviceState *dev)
> +{
> +    qemu_unregister_reset(pcmcia_card_reset_handler, dev);
> +}

Why isn't a pcmcia card something that plugs into a bus ?

-- PMM

On 4/25/21 8:36 PM, Peter Maydell wrote:
> On Sat, 24 Apr 2021 at 17:22, Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
>>
>> The abstract PCMCIA_CARD is a bus-less TYPE_DEVICE, so devices
>> implementing it are not reset automatically.
>> Register a reset handler so children get reset on machine reset.
>>
>> Note, the DSCM-1XXXX device (TYPE_DSCM1XXXX) which inherits
>> TYPE_MICRODRIVE and PCMCIA_CARD reset itself when a disk is
>> attached or detached, but was not resetting itself on machine
>> reset.
>>
>> It doesn't seem to be an issue because it is that way since the
>> device QDev'ifycation 8 years ago, in commit d1f2c96a81a
>> ("pcmcia: QOM'ify PCMCIACardState and MicroDriveState").
>> Still, correct to have a proper API usage.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
>> ---
>>  hw/pcmcia/pcmcia.c | 25 +++++++++++++++++++++++++
>>  1 file changed, 25 insertions(+)
>>
>> diff --git a/hw/pcmcia/pcmcia.c b/hw/pcmcia/pcmcia.c
>> index 03d13e7d670..73656257227 100644
>> --- a/hw/pcmcia/pcmcia.c
>> +++ b/hw/pcmcia/pcmcia.c
>> @@ -6,14 +6,39 @@
>>
>>  #include "qemu/osdep.h"
>>  #include "qemu/module.h"
>> +#include "sysemu/reset.h"
>>  #include "hw/pcmcia.h"
>>
>> +static void pcmcia_card_reset_handler(void *dev)
>> +{
>> +    device_legacy_reset(DEVICE(dev));
>> +}
>> +
>> +static void pcmcia_card_realize(DeviceState *dev, Error **errp)
>> +{
>> +    qemu_register_reset(pcmcia_card_reset_handler, dev);
>> +}
>> +
>> +static void pcmcia_card_unrealize(DeviceState *dev)
>> +{
>> +    qemu_unregister_reset(pcmcia_card_reset_handler, dev);
>> +}
> 
> Why isn't a pcmcia card something that plugs into a bus ?

No clue, looks like a very old device with unfinished qdev-ification?

See pxa2xx_pcmcia_attach():

/* Insert a new card into a slot */
int pxa2xx_pcmcia_attach(void *opaque, PCMCIACardState *card)
{
    PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
    PCMCIACardClass *pcc;

    ...
    s->card = card;
    pcc = PCMCIA_CARD_GET_CLASS(s->card);
    ...
    s->card->slot = &s->slot;
    pcc->attach(s->card);
    ...
}