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X-Received-From: 2607:f8b0:4864:20::343 Subject: [Qemu-devel] [PATCH 17/19] i2c:smbus_eeprom: Add vmstate handling to the smbus eeprom X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Corey Minyard , Corey Minyard , "Michael S . Tsirkin" , "Dr . David Alan Gilbert" , Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Corey Minyard Transfer the state of the EEPROM on a migration. This way the data remains consistent on migration. This required moving the actual data to a separate array and using the data provided in the init function as a separate initialization array, since a pointer property has to be a void * and the array needs to be uint8_t[]. Signed-off-by: Corey Minyard Cc: Paolo Bonzini Cc: Michael S. Tsirkin Cc: Dr. David Alan Gilbert Cc: Peter Maydell Reviewed-by: Dr. David Alan Gilbert --- hw/i2c/smbus_eeprom.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/hw/i2c/smbus_eeprom.c b/hw/i2c/smbus_eeprom.c index b3cc9c7083..c0a0c4d501 100644 --- a/hw/i2c/smbus_eeprom.c +++ b/hw/i2c/smbus_eeprom.c @@ -24,6 +24,7 @@ =20 #include "qemu/osdep.h" #include "hw/hw.h" +#include "hw/boards.h" #include "hw/i2c/i2c.h" #include "hw/i2c/smbus_slave.h" #include "hw/i2c/smbus_eeprom.h" @@ -39,8 +40,10 @@ =20 typedef struct SMBusEEPROMDevice { SMBusDevice smbusdev; - void *data; + uint8_t data[SMBUS_EEPROM_SIZE]; + void *init_data; uint8_t offset; + bool accessed; } SMBusEEPROMDevice; =20 static uint8_t eeprom_receive_byte(SMBusDevice *dev) @@ -49,6 +52,7 @@ static uint8_t eeprom_receive_byte(SMBusDevice *dev) uint8_t *data =3D eeprom->data; uint8_t val =3D data[eeprom->offset++]; =20 + eeprom->accessed =3D true; #ifdef DEBUG printf("eeprom_receive_byte: addr=3D0x%02x val=3D0x%02x\n", dev->i2c.address, val); @@ -61,6 +65,7 @@ static int eeprom_write_data(SMBusDevice *dev, uint8_t *b= uf, uint8_t len) SMBusEEPROMDevice *eeprom =3D SMBUS_EEPROM(dev); uint8_t *data =3D eeprom->data; =20 + eeprom->accessed =3D true; #ifdef DEBUG printf("eeprom_write_byte: addr=3D0x%02x cmd=3D0x%02x val=3D0x%02x\n", dev->i2c.address, buf[0], buf[1]); @@ -78,15 +83,39 @@ static int eeprom_write_data(SMBusDevice *dev, uint8_t = *buf, uint8_t len) return 0; } =20 +static bool smbus_eeprom_vmstate_needed(void *opaque) +{ + MachineClass *mc =3D MACHINE_GET_CLASS(qdev_get_machine()); + SMBusEEPROMDevice *eeprom =3D opaque; + + return (eeprom->accessed || smbus_vmstate_needed(&eeprom->smbusdev)) && + !mc->smbus_no_migration_support; +} + +static const VMStateDescription vmstate_smbus_eeprom =3D { + .name =3D "smbus-eeprom", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D smbus_eeprom_vmstate_needed, + .fields =3D (VMStateField[]) { + VMSTATE_SMBUS_DEVICE(smbusdev, SMBusEEPROMDevice), + VMSTATE_UINT8_ARRAY(data, SMBusEEPROMDevice, SMBUS_EEPROM_SIZE), + VMSTATE_UINT8(offset, SMBusEEPROMDevice), + VMSTATE_BOOL(accessed, SMBusEEPROMDevice), + VMSTATE_END_OF_LIST() + } +}; + static void smbus_eeprom_realize(DeviceState *dev, Error **errp) { SMBusEEPROMDevice *eeprom =3D SMBUS_EEPROM(dev); =20 + memcpy(eeprom->data, eeprom->init_data, SMBUS_EEPROM_SIZE); eeprom->offset =3D 0; } =20 static Property smbus_eeprom_properties[] =3D { - DEFINE_PROP_PTR("data", SMBusEEPROMDevice, data), + DEFINE_PROP_PTR("data", SMBusEEPROMDevice, init_data), DEFINE_PROP_END_OF_LIST(), }; =20 @@ -99,6 +128,7 @@ static void smbus_eeprom_class_initfn(ObjectClass *klass= , void *data) sc->receive_byte =3D eeprom_receive_byte; sc->write_data =3D eeprom_write_data; dc->props =3D smbus_eeprom_properties; + dc->vmsd =3D &vmstate_smbus_eeprom; /* Reason: pointer property "data" */ dc->user_creatable =3D false; } --=20 2.17.1