Re: [PATCH] arm/aspeed: Rework NIC attachment

["Cédric Le Goater" <clg@kaod.org>]

On 5/20/20 8:34 AM, Markus Armbruster wrote:
> Cédric Le Goater <clg@kaod.org> writes:
> 
>> The AST2400 and AST2500 SoCs have two MACs but only the first MAC0 is
>> active on the Aspeed machines using these SoCs. The AST2600 has four
>> MACs. The AST2600 EVB machine activates MAC1, MAC2 and MAC3 and the
>> Tacoma BMC machine activates MAC2.
>>
>> Introduce a bit-field property "macs-mask" under the Aspeed SoC model
>> to link the active MACs of the machine being started with the available
>> network devices.
>>
>> Inactive MACs will have no peer and QEMU will warn the user with :
>>
>>     qemu-system-arm: warning: nic ftgmac100.0 has no peer
>>     qemu-system-arm: warning: nic ftgmac100.1 has no peer
>>     qemu-system-arm: warning: nic ftgmac100.3 has no peer
> 
> I can't reproduce this warning.  What's your exact command line?

Get a witherspoon-tacoma flash image :

    $ wget https://openpower.xyz/job/openbmc-build/distro=ubuntu,label=builder,target=witherspoon-tacoma/lastSuccessfulBuild/artifact/deploy/images/witherspoon-tacoma/flash-witherspoon-tacoma

Run :

    $ qemu-system-arm -M tacoma-bmc -nic user -drive file=./flash-witherspoon-tacoma,format=raw,if=mtd -nographic -nodefaults -serial mon:stdio
    qemu-system-arm: warning: nic ftgmac100.0 has no peer
    qemu-system-arm: warning: nic ftgmac100.1 has no peer
    qemu-system-arm: warning: nic ftgmac100.3 has no peer
    
> 
>> Signed-off-by: Cédric Le Goater <clg@kaod.org>
>> ---
>>
>>  To be applied on top of patch "arm/aspeed: Compute the number of CPUs
>>  from the SoC definition" 
>>  
>>  http://patchwork.ozlabs.org/project/qemu-devel/patch/20200519091631.1006073-1-clg@kaod.org/
>>  
>>  include/hw/arm/aspeed.h     |  1 +
>>  include/hw/arm/aspeed_soc.h |  6 ++++++
>>  hw/arm/aspeed.c             |  6 ++++++
>>  hw/arm/aspeed_ast2600.c     | 11 ++++++++---
>>  hw/arm/aspeed_soc.c         | 10 ++++++++--
>>  5 files changed, 29 insertions(+), 5 deletions(-)
>>
>> diff --git a/include/hw/arm/aspeed.h b/include/hw/arm/aspeed.h
>> index 18521484b90e..842dff485f5b 100644
>> --- a/include/hw/arm/aspeed.h
>> +++ b/include/hw/arm/aspeed.h
>> @@ -39,6 +39,7 @@ typedef struct AspeedMachineClass {
>>      const char *fmc_model;
>>      const char *spi_model;
>>      uint32_t num_cs;
>> +    uint32_t macs_mask;
>>      void (*i2c_init)(AspeedBoardState *bmc);
>>  } AspeedMachineClass;
>>  
>> diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h
>> index 914115f3ef77..fdb9e05bc47c 100644
>> --- a/include/hw/arm/aspeed_soc.h
>> +++ b/include/hw/arm/aspeed_soc.h
>> @@ -34,6 +34,11 @@
>>  #define ASPEED_CPUS_NUM  2
>>  #define ASPEED_MACS_NUM  4
>>  
>> +#define ASPEED_MAC0_ON   (1 << 0)
>> +#define ASPEED_MAC1_ON   (1 << 1)
>> +#define ASPEED_MAC2_ON   (1 << 2)
>> +#define ASPEED_MAC3_ON   (1 << 3)
>> +
>>  typedef struct AspeedSoCState {
>>      /*< private >*/
>>      DeviceState parent;
>> @@ -55,6 +60,7 @@ typedef struct AspeedSoCState {
>>      AspeedSDMCState sdmc;
>>      AspeedWDTState wdt[ASPEED_WDTS_NUM];
>>      FTGMAC100State ftgmac100[ASPEED_MACS_NUM];
>> +    uint32_t macs_mask;
> 
> What's the purpose of this member?  When and how would it be different
> from AspeedMachineClass's macs_mask?

Each machine activates a different set of MACs even if using the same SoC.
So, the SoC macs_mask is overiden when the machine initializes the SoC in 
aspeed_machine_init().

That said, I think the default SoC macs_mask should be all MACS, a value 
of 0xFFFFFFFF would be fine, and not only the first MAC as this patch does.


> 
>>      AspeedMiiState mii[ASPEED_MACS_NUM];
>>      AspeedGPIOState gpio;
>>      AspeedGPIOState gpio_1_8v;
>> diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
>> index 6f8f4b88f8ab..79c683864d7e 100644
>> --- a/hw/arm/aspeed.c
>> +++ b/hw/arm/aspeed.c
>> @@ -283,6 +283,8 @@ static void aspeed_machine_init(MachineState *machine)
>>                              &error_abort);
>>      object_property_set_int(OBJECT(&bmc->soc), amc->num_cs, "num-cs",
>>                              &error_abort);
>> +    object_property_set_int(OBJECT(&bmc->soc), amc->macs_mask, "macs-mask",
>> +                            &error_abort);
>>      object_property_set_link(OBJECT(&bmc->soc), OBJECT(&bmc->ram_container),
>>                               "dram", &error_abort);
>>      if (machine->kernel_filename) {
>> @@ -556,12 +558,14 @@ static int aspeed_soc_num_cpus(const char *soc_name)
>>  static void aspeed_machine_class_init(ObjectClass *oc, void *data)
>>  {
>>      MachineClass *mc = MACHINE_CLASS(oc);
>> +    AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
>>  
>>      mc->init = aspeed_machine_init;
>>      mc->no_floppy = 1;
>>      mc->no_cdrom = 1;
>>      mc->no_parallel = 1;
>>      mc->default_ram_id = "ram";
>> +    amc->macs_mask = ASPEED_MAC0_ON;
>>  
>>      aspeed_machine_class_props_init(oc);
>>  }
>> @@ -680,6 +684,7 @@ static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc, void *data)
>>      amc->fmc_model = "w25q512jv";
>>      amc->spi_model = "mx66u51235f";
>>      amc->num_cs    = 1;
>> +    amc->macs_mask  = ASPEED_MAC1_ON | ASPEED_MAC2_ON | ASPEED_MAC3_ON;
>>      amc->i2c_init  = ast2600_evb_i2c_init;
>>      mc->default_ram_size = 1 * GiB;
>>      mc->default_cpus = mc->min_cpus = mc->max_cpus =
>> @@ -698,6 +703,7 @@ static void aspeed_machine_tacoma_class_init(ObjectClass *oc, void *data)
>>      amc->fmc_model = "mx66l1g45g";
>>      amc->spi_model = "mx66l1g45g";
>>      amc->num_cs    = 2;
>> +    amc->macs_mask  = ASPEED_MAC2_ON;
>>      amc->i2c_init  = witherspoon_bmc_i2c_init; /* Same board layout */
>>      mc->default_ram_size = 1 * GiB;
>>      mc->default_cpus = mc->min_cpus = mc->max_cpus =
>> diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
>> index 114b94f8f44d..fa85122f6d78 100644
>> --- a/hw/arm/aspeed_ast2600.c
>> +++ b/hw/arm/aspeed_ast2600.c
>> @@ -247,6 +247,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
>>      AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
>>      Error *err = NULL, *local_err = NULL;
>>      qemu_irq irq;
>> +    NICInfo *nd = &nd_table[0];
>>  
>>      /* IO space */
>>      create_unimplemented_device("aspeed_soc.io", sc->memmap[ASPEED_IOMEM],
>> @@ -462,8 +463,12 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
>>      }
>>  
>>      /* Net */
>> -    for (i = 0; i < nb_nics && i < sc->macs_num; i++) {
>> -        qdev_set_nic_properties(DEVICE(&s->ftgmac100[i]), &nd_table[i]);
>> +    for (i = 0; i < sc->macs_num; i++) {
>> +        if ((s->macs_mask & (1 << i)) && nd->used) {
>> +            qemu_check_nic_model(nd, TYPE_FTGMAC100);
>> +            qdev_set_nic_properties(DEVICE(&s->ftgmac100[i]), nd);
>> +            nd++;
>> +        }
>>          object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "aspeed",
>>                                   &err);
>>          object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "realized",
>> @@ -471,7 +476,7 @@ static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
>>          error_propagate(&err, local_err);
>>          if (err) {
>>              error_propagate(errp, err);
>> -           return;
>> +            return;
>>          }
>>          sysbus_mmio_map(SYS_BUS_DEVICE(&s->ftgmac100[i]), 0,
>>                          sc->memmap[ASPEED_ETH1 + i]);
>> diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
>> index 984d29087dce..d2c6a5760790 100644
>> --- a/hw/arm/aspeed_soc.c
>> +++ b/hw/arm/aspeed_soc.c
>> @@ -234,6 +234,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
>>      AspeedSoCState *s = ASPEED_SOC(dev);
>>      AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
>>      Error *err = NULL, *local_err = NULL;
>> +    NICInfo *nd = &nd_table[0];
>>  
>>      /* IO space */
>>      create_unimplemented_device("aspeed_soc.io", sc->memmap[ASPEED_IOMEM],
>> @@ -405,8 +406,12 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
>>      }
>>  
>>      /* Net */
>> -    for (i = 0; i < nb_nics && i < sc->macs_num; i++) {
>> -        qdev_set_nic_properties(DEVICE(&s->ftgmac100[i]), &nd_table[i]);
>> +    for (i = 0; i < sc->macs_num; i++) {
>> +        if ((s->macs_mask & (1 << i)) && nd->used) {
>> +            qemu_check_nic_model(nd, TYPE_FTGMAC100);
>> +            qdev_set_nic_properties(DEVICE(&s->ftgmac100[i]), nd);
>> +            nd++;
>> +        }
>>          object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "aspeed",
>>                                   &err);
>>          object_property_set_bool(OBJECT(&s->ftgmac100[i]), true, "realized",
>> @@ -455,6 +460,7 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
>>                         aspeed_soc_get_irq(s, ASPEED_SDHCI));
>>  }
>>  static Property aspeed_soc_properties[] = {
>> +    DEFINE_PROP_UINT32("macs-mask", AspeedSoCState, macs_mask, 0x1),
>>      DEFINE_PROP_LINK("dram", AspeedSoCState, dram_mr, TYPE_MEMORY_REGION,
>>                       MemoryRegion *),
>>      DEFINE_PROP_END_OF_LIST(),
>