Re: [Qemu-devel] [PATCH v1 1/3] ahci: Separate the AHCI state structure into the header

[Alistair Francis]

On Wed, Jul 29, 2015 at 3:21 PM, John Snow <address@hidden> wrote:
>
>
> On 07/27/2015 02:37 PM, Alistair Francis wrote:
>> Pull the AHCI state structure out into the header. This allows
>> other containers to access the struct. This is required to add
>> the device to modern SoC containers.
>>
>
> Is there a reason this structure needs to be directly inlined into
> XlnxZynqMPState, instead of using e.g.
> qdev_create/object_property_add_child and letting SysbusAHCIState be the
> business of ahci.c?

AFAIK there isn't a huge advantage, it ends up achieving basically the
same thing. It just means that we don't need to use
the old qdev_* functions (as much). It also follows with QOMificatiom and
the device creation can be split up over the init and realise functions.

This is also the way I did machine creation for the Netduino 2 and how
it is done for the rest of the ZynqMP device.

Thanks,

Alistair

>
> Asking as a bit of a qdev outsider.
>
> --js
>
>> Signed-off-by: Alistair Francis <address@hidden>
>> Reviewed-by: Sai Pavan Boddu <address@hidden>
>> ---
>>  hw/ide/ahci.c |   13 -------------
>>  hw/ide/ahci.h |   14 ++++++++++++++
>>  2 files changed, 14 insertions(+), 13 deletions(-)
>>
>> diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
>> index 48749c1..02d85fa 100644
>> --- a/hw/ide/ahci.c
>> +++ b/hw/ide/ahci.c
>> @@ -25,7 +25,6 @@
>>  #include <hw/pci/msi.h>
>>  #include <hw/i386/pc.h>
>>  #include <hw/pci/pci.h>
>> -#include <hw/sysbus.h>
>>
>>  #include "qemu/error-report.h"
>>  #include "sysemu/block-backend.h"
>> @@ -1625,18 +1624,6 @@ const VMStateDescription vmstate_ahci = {
>>      },
>>  };
>>
>> -#define TYPE_SYSBUS_AHCI "sysbus-ahci"
>> -#define SYSBUS_AHCI(obj) OBJECT_CHECK(SysbusAHCIState, (obj), 
>> TYPE_SYSBUS_AHCI)
>> -
>> -typedef struct SysbusAHCIState {
>> -    /*< private >*/
>> -    SysBusDevice parent_obj;
>> -    /*< public >*/
>> -
>> -    AHCIState ahci;
>> -    uint32_t num_ports;
>> -} SysbusAHCIState;
>> -
>>  static const VMStateDescription vmstate_sysbus_ahci = {
>>      .name = "sysbus-ahci",
>>      .fields = (VMStateField[]) {
>> diff --git a/hw/ide/ahci.h b/hw/ide/ahci.h
>> index 68d5074..5ab8ea4 100644
>> --- a/hw/ide/ahci.h
>> +++ b/hw/ide/ahci.h
>> @@ -24,6 +24,8 @@
>>  #ifndef HW_IDE_AHCI_H
>>  #define HW_IDE_AHCI_H
>>
>> +#include <hw/sysbus.h>
>> +
>>  #define AHCI_MEM_BAR_SIZE         0x1000
>>  #define AHCI_MAX_PORTS            32
>>  #define AHCI_MAX_SG               168 /* hardware max is 64K */
>> @@ -369,4 +371,16 @@ void ahci_reset(AHCIState *s);
>>
>>  void ahci_ide_create_devs(PCIDevice *dev, DriveInfo **hd);
>>
>> +#define TYPE_SYSBUS_AHCI "sysbus-ahci"
>> +#define SYSBUS_AHCI(obj) OBJECT_CHECK(SysbusAHCIState, (obj), 
>> TYPE_SYSBUS_AHCI)
>> +
>> +typedef struct SysbusAHCIState {
>> +    /*< private >*/
>> +    SysBusDevice parent_obj;
>> +    /*< public >*/
>> +
>> +    AHCIState ahci;
>> +    uint32_t num_ports;
>> +} SysbusAHCIState;
>> +
>>  #endif /* HW_IDE_AHCI_H */
>>
>