Re: [PATCH v3 4/4] hw/riscv/virt: Add IOPMP support

[Ethan Chen]

On Tue, Nov 21, 2023 at 03:22:18PM +1000, Alistair Francis wrote:
> On Tue, Nov 14, 2023 at 7:48 PM Ethan Chen via <qemu-devel@nongnu.org> wrote:
> >
> > - Add 'iopmp=on' option to enable a iopmp device and a dma device
> >  connect to the iopmp device
> > - Add 'iopmp_cascade=on' option to enable iopmp cascading.
> 
> Can we document these in docs/system/riscv/virt.rst
> 
> Alistair

Sure. I will document these.

Thanks,
Ethan Chen

> 
> >
> > Signed-off-by: Ethan Chen <ethan84@andestech.com>
> > ---
> >  hw/riscv/Kconfig        |  2 ++
> >  hw/riscv/virt.c         | 72 +++++++++++++++++++++++++++++++++++++++--
> >  include/hw/riscv/virt.h | 10 +++++-
> >  3 files changed, 81 insertions(+), 3 deletions(-)
> >
> > diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig
> > index b6a5eb4452..c30a104aa4 100644
> > --- a/hw/riscv/Kconfig
> > +++ b/hw/riscv/Kconfig
> > @@ -45,6 +45,8 @@ config RISCV_VIRT
> >      select FW_CFG_DMA
> >      select PLATFORM_BUS
> >      select ACPI
> > +    select ATCDMAC300
> > +    select RISCV_IOPMP
> >
> >  config SHAKTI_C
> >      bool
> > diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
> > index c7fc97e273..3e23ee3afc 100644
> > --- a/hw/riscv/virt.c
> > +++ b/hw/riscv/virt.c
> > @@ -53,6 +53,8 @@
> >  #include "hw/display/ramfb.h"
> >  #include "hw/acpi/aml-build.h"
> >  #include "qapi/qapi-visit-common.h"
> > +#include "hw/misc/riscv_iopmp.h"
> > +#include "hw/dma/atcdmac300.h"
> >
> >  /*
> >   * The virt machine physical address space used by some of the devices
> > @@ -97,6 +99,9 @@ static const MemMapEntry virt_memmap[] = {
> >      [VIRT_UART0] =        { 0x10000000,         0x100 },
> >      [VIRT_VIRTIO] =       { 0x10001000,        0x1000 },
> >      [VIRT_FW_CFG] =       { 0x10100000,          0x18 },
> > +    [VIRT_IOPMP] =        { 0x10200000,      0x100000 },
> > +    [VIRT_IOPMP2] =       { 0x10300000,      0x100000 },
> > +    [VIRT_DMAC] =         { 0x10400000,      0x100000 },
> >      [VIRT_FLASH] =        { 0x20000000,     0x4000000 },
> >      [VIRT_IMSIC_M] =      { 0x24000000, VIRT_IMSIC_MAX_SIZE },
> >      [VIRT_IMSIC_S] =      { 0x28000000, VIRT_IMSIC_MAX_SIZE },
> > @@ -1527,13 +1532,33 @@ static void virt_machine_init(MachineState *machine)
> >
> >      create_platform_bus(s, mmio_irqchip);
> >
> > -    serial_mm_init(system_memory, memmap[VIRT_UART0].base,
> > -        0, qdev_get_gpio_in(mmio_irqchip, UART0_IRQ), 399193,
> > +    serial_mm_init(system_memory, memmap[VIRT_UART0].base + 0x20,
> > +        0x2, qdev_get_gpio_in(mmio_irqchip, UART0_IRQ), 38400,
> >          serial_hd(0), DEVICE_LITTLE_ENDIAN);
> >
> >      sysbus_create_simple("goldfish_rtc", memmap[VIRT_RTC].base,
> >          qdev_get_gpio_in(mmio_irqchip, RTC_IRQ));
> >
> > +    /* DMAC */
> > +    DeviceState *dmac_dev = atcdmac300_create("atcdmac300",
> > +        memmap[VIRT_DMAC].base, memmap[VIRT_DMAC].size,
> > +        qdev_get_gpio_in(DEVICE(mmio_irqchip), DMAC_IRQ));
> > +
> > +    if (s->have_iopmp) {
> > +        /* IOPMP */
> > +        DeviceState *iopmp_dev = iopmp_create(memmap[VIRT_IOPMP].base,
> > +            qdev_get_gpio_in(DEVICE(mmio_irqchip), IOPMP_IRQ));
> > +        /* DMA with IOPMP */
> > +        atcdmac300_connect_iopmp(dmac_dev, &(IOPMP(iopmp_dev)->iopmp_as),
> > +            (StreamSink *)&(IOPMP(iopmp_dev)->transaction_info_sink), 0);
> > +        if (s->have_iopmp_cascade) {
> > +            DeviceState *iopmp_dev2 = 
> > iopmp_create(memmap[VIRT_IOPMP2].base,
> > +                qdev_get_gpio_in(DEVICE(mmio_irqchip), IOPMP2_IRQ));
> > +            cascade_iopmp(iopmp_dev, iopmp_dev2);
> > +        }
> > +    }
> > +
> > +
> >      for (i = 0; i < ARRAY_SIZE(s->flash); i++) {
> >          /* Map legacy -drive if=pflash to machine properties */
> >          pflash_cfi01_legacy_drive(s->flash[i],
> > @@ -1628,6 +1653,35 @@ static void virt_set_aclint(Object *obj, bool value, 
> > Error **errp)
> >      s->have_aclint = value;
> >  }
> >
> > +static bool virt_get_iopmp(Object *obj, Error **errp)
> > +{
> > +    RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
> > +
> > +    return s->have_iopmp;
> > +}
> > +
> > +static void virt_set_iopmp(Object *obj, bool value, Error **errp)
> > +{
> > +    RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
> > +
> > +    s->have_iopmp = value;
> > +}
> > +
> > +static bool virt_get_iopmp_cascade(Object *obj, Error **errp)
> > +{
> > +    RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
> > +
> > +    return s->have_iopmp_cascade;
> > +}
> > +
> > +static void virt_set_iopmp_cascade(Object *obj, bool value, Error **errp)
> > +{
> > +    RISCVVirtState *s = RISCV_VIRT_MACHINE(obj);
> > +
> > +    s->have_iopmp_cascade = value;
> > +}
> > +
> > +
> >  bool virt_is_acpi_enabled(RISCVVirtState *s)
> >  {
> >      return s->acpi != ON_OFF_AUTO_OFF;
> > @@ -1730,6 +1784,20 @@ static void virt_machine_class_init(ObjectClass *oc, 
> > void *data)
> >                                NULL, NULL);
> >      object_class_property_set_description(oc, "acpi",
> >                                            "Enable ACPI");
> > +
> > +    object_class_property_add_bool(oc, "iopmp", virt_get_iopmp,
> > +                                   virt_set_iopmp);
> > +    object_class_property_set_description(oc, "iopmp",
> > +                                          "Set on/off to enable/disable "
> > +                                          "iopmp device");
> > +
> > +    object_class_property_add_bool(oc, "iopmp-cascade",
> > +                                   virt_get_iopmp_cascade,
> > +                                   virt_set_iopmp_cascade);
> > +    object_class_property_set_description(oc, "iopmp-cascade",
> > +                                          "Set on/off to enable/disable "
> > +                                          "iopmp2 device which is cascaded 
> > by "
> > +                                          "iopmp1 device");
> >  }
> >
> >  static const TypeInfo virt_machine_typeinfo = {
> > diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
> > index e5c474b26e..5fa2944d29 100644
> > --- a/include/hw/riscv/virt.h
> > +++ b/include/hw/riscv/virt.h
> > @@ -54,6 +54,8 @@ struct RISCVVirtState {
> >
> >      int fdt_size;
> >      bool have_aclint;
> > +    bool have_iopmp;
> > +    bool have_iopmp_cascade;
> >      RISCVVirtAIAType aia_type;
> >      int aia_guests;
> >      char *oem_id;
> > @@ -82,12 +84,18 @@ enum {
> >      VIRT_PCIE_MMIO,
> >      VIRT_PCIE_PIO,
> >      VIRT_PLATFORM_BUS,
> > -    VIRT_PCIE_ECAM
> > +    VIRT_PCIE_ECAM,
> > +    VIRT_IOPMP,
> > +    VIRT_IOPMP2,
> > +    VIRT_DMAC,
> >  };
> >
> >  enum {
> >      UART0_IRQ = 10,
> >      RTC_IRQ = 11,
> > +    DMAC_IRQ = 12,
> > +    IOPMP_IRQ = 13,
> > +    IOPMP2_IRQ = 14,
> >      VIRTIO_IRQ = 1, /* 1 to 8 */
> >      VIRTIO_COUNT = 8,
> >      PCIE_IRQ = 0x20, /* 32 to 35 */
> > --
> > 2.34.1
> >
> >