Re: [Qemu-devel] [PATCH 5/9] IPMI: Add a PC ISA type structure

[Paolo Bonzini <pbonzini@redhat.com>]

Il 09/07/2012 21:17, minyard@acm.org ha scritto:
> From: Corey Minyard <cminyard@mvista.com>
> 
> This provides the base infrastructure to tie IPMI low-level
> interfaces into a PC ISA bus.
> 
> Signed-off-by: Corey Minyard <cminyard@mvista.com>
> ---
>  default-configs/i386-softmmu.mak   |    1 +
>  default-configs/x86_64-softmmu.mak |    1 +
>  hw/Makefile.objs                   |    1 +
>  hw/isa_ipmi.c                      |  138 ++++++++++++++++++++++++++++++++++++
>  hw/pc.c                            |   12 +++
>  hw/pc.h                            |   18 +++++
>  hw/smbios.h                        |   12 +++
>  7 files changed, 183 insertions(+), 0 deletions(-)
>  create mode 100644 hw/isa_ipmi.c
> 
> diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
> index eb17afc..c0aff0d 100644
> --- a/default-configs/i386-softmmu.mak
> +++ b/default-configs/i386-softmmu.mak
> @@ -8,6 +8,7 @@ CONFIG_VGA_CIRRUS=y
>  CONFIG_VMWARE_VGA=y
>  CONFIG_VMMOUSE=y
>  CONFIG_IPMI=y
> +CONFIG_ISA_IPMI=y
>  CONFIG_SERIAL=y
>  CONFIG_PARALLEL=y
>  CONFIG_I8254=y
> diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak
> index e4e3e4f..615e4f2 100644
> --- a/default-configs/x86_64-softmmu.mak
> +++ b/default-configs/x86_64-softmmu.mak
> @@ -8,6 +8,7 @@ CONFIG_VGA_CIRRUS=y
>  CONFIG_VMWARE_VGA=y
>  CONFIG_VMMOUSE=y
>  CONFIG_IPMI=y
> +CONFIG_ISA_IPMI=y
>  CONFIG_SERIAL=y
>  CONFIG_PARALLEL=y
>  CONFIG_I8254=y
> diff --git a/hw/Makefile.objs b/hw/Makefile.objs
> index 0d55997..8f27ffe 100644
> --- a/hw/Makefile.objs
> +++ b/hw/Makefile.objs
> @@ -21,6 +21,7 @@ hw-obj-$(CONFIG_ESCC) += escc.o
>  hw-obj-$(CONFIG_EMPTY_SLOT) += empty_slot.o
>  
>  hw-obj-$(CONFIG_IPMI) += ipmi.o
> +hw-obj-$(CONFIG_ISA_IPMI) += isa_ipmi.o
>  
>  hw-obj-$(CONFIG_SERIAL) += serial.o
>  hw-obj-$(CONFIG_PARALLEL) += parallel.o
> diff --git a/hw/isa_ipmi.c b/hw/isa_ipmi.c
> new file mode 100644
> index 0000000..cad78b0
> --- /dev/null
> +++ b/hw/isa_ipmi.c
> @@ -0,0 +1,138 @@
> +/*
> + * QEMU ISA IPMI KCS emulation
> + *
> + * Copyright (c) 2012 Corey Minyard, MontaVista Software, LLC
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a copy
> + * of this software and associated documentation files (the "Software"), to deal
> + * in the Software without restriction, including without limitation the rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + */
> +#include "hw.h"
> +#include "isa.h"
> +#include "pc.h"
> +#include "qemu-timer.h"
> +#include "sysemu.h"
> +#include "smbios.h"
> +#include "ipmi.h"
> +
> +
> +typedef struct ISAIPMIState {
> +    ISADevice dev;
> +    uint32_t type;
> +    uint32_t iobase;
> +    uint32_t isairq;
> +    uint8_t slave_addr;
> +    IPMIState state;
> +} ISAIPMIState;

I would prefer to have a TYPE_IPMI_INTERFACE class for IPMIState.  Then
you can subclass that class in patches 6/7/8, and include a pointer in
ISAIPMIState.

Paolo

> +static int ipmi_isa_initfn(ISADevice *dev)
> +{
> +    ISAIPMIState *isa = DO_UPCAST(ISAIPMIState, dev, dev);
> +    struct smbios_type_38 smb38;
> +
> +    if (isa->iobase == -1) {
> +	/* If no I/O base is specified, set the defaults */
> +	switch (isa->type) {
> +	case IPMI_KCS:
> +	    isa->iobase = 0xca2;
> +	    break;
> +	case IPMI_BT:
> +	    isa->iobase = 0xe4;
> +	    break;
> +	case IPMI_SMIC:
> +	    isa->iobase = 0xca9;
> +	    break;
> +	default:
> +	    fprintf(stderr, "Unknown IPMI type: %d\n", isa->type);
> +	    abort();
> +	}
> +    }
> +
> +    isa->state.slave_addr = isa->slave_addr;
> +
> +    qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 3);
> +
> +    ipmi_init(isa->type, &isa->state);
> +
> +    if (isa->isairq > 0) {
> +	isa_init_irq(dev, &isa->state.irq, isa->isairq);
> +	isa->state.use_irq = 1;
> +    }
> +
> +    isa_register_ioport(dev, &isa->state.io, isa->iobase);
> +
> +    smb38.header.type = 38;
> +    smb38.header.length = sizeof(smb38);
> +    smb38.header.handle = 0x3000;
> +    smb38.interface_type = isa->state.smbios_type;
> +    smb38.ipmi_version = 0x20;
> +    smb38.i2c_slave_addr = isa->state.slave_addr;
> +    smb38.nv_storage_dev_addr = 0;
> +
> +    /* or 1 to set it to I/O space */
> +    smb38.base_addr = isa->iobase | 1;
> +
> +     /* 1-byte boundaries, addr bit0=0, level triggered irq */
> +    smb38.base_addr_mod_and_irq_info = 1;
> +    smb38.interrupt_number = isa->isairq;
> +    smbios_table_entry_add((struct smbios_structure_header *) &smb38);
> +
> +    return 0;
> +}
> +
> +static Property ipmi_isa_properties[] = {
> +    DEFINE_PROP_HEX32("type", ISAIPMIState, type,  IPMI_KCS),
> +    DEFINE_PROP_HEX32("iobase", ISAIPMIState, iobase,  -1),
> +    DEFINE_PROP_UINT32("irq",   ISAIPMIState, isairq,  0),
> +    DEFINE_PROP_UINT8("slave_addr", ISAIPMIState, slave_addr,  0),
> +    DEFINE_PROP_PTR("charopts",  ISAIPMIState, state.chropts),
> +    DEFINE_PROP_END_OF_LIST(),
> +};
> +
> +static const VMStateDescription vmstate_isa_ipmi = {
> +    .name = "isa-ipmi",
> +    .version_id = 3,
> +    .minimum_version_id = 3,
> +    .fields      = (VMStateField []) {
> +        VMSTATE_STRUCT(state, ISAIPMIState, 0, vmstate_isa_ipmi,
> +		       IPMIState),
> +        VMSTATE_END_OF_LIST()
> +    }
> +};
> +
> +static void ipmi_isa_class_initfn(ObjectClass *klass, void *data)
> +{
> +    DeviceClass *dc = DEVICE_CLASS(klass);
> +    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
> +    ic->init = ipmi_isa_initfn;
> +    dc->vmsd = &vmstate_isa_ipmi;
> +    dc->props = ipmi_isa_properties;
> +}
> +
> +static TypeInfo ipmi_isa_info = {
> +    .name          = "isa-ipmi",
> +    .parent        = TYPE_ISA_DEVICE,
> +    .instance_size = sizeof(ISAIPMIState),
> +    .class_init    = ipmi_isa_class_initfn,
> +};
> +
> +static void ipmi_register_types(void)
> +{
> +    type_register_static(&ipmi_isa_info);
> +}
> +
> +type_init(ipmi_register_types)
> diff --git a/hw/pc.c b/hw/pc.c
> index c0acb6a..965e053 100644
> --- a/hw/pc.c
> +++ b/hw/pc.c
> @@ -1173,6 +1173,18 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
>          fd[i] = drive_get(IF_FLOPPY, 0, i);
>      }
>      *floppy = fdctrl_init_isa(isa_bus, fd);
> +
> +    i = 0;
> +    if (do_local_ipmi) {
> +	ipmi_isa_init(isa_bus, isa_find_free_irq(isa_bus), ipmi_types[i], NULL);
> +	i++;
> +    }
> +    for(; i < MAX_IPMI_DEVICES; i++) {
> +	if (ipmi_hds[i]) {
> +	    ipmi_isa_init(isa_bus, isa_find_free_irq(isa_bus),
> +			  ipmi_types[i], ipmi_hds[i]);
> +	}
> +    }
>  }
>  
>  void pc_pci_device_init(PCIBus *pci_bus)
> diff --git a/hw/pc.h b/hw/pc.h
> index 33ab689..5b6d947 100644
> --- a/hw/pc.h
> +++ b/hw/pc.h
> @@ -223,6 +223,24 @@ static inline bool isa_ne2000_init(ISABus *bus, int base, int irq, NICInfo *nd)
>      return true;
>  }
>  
> +/* IPMI */
> +static inline bool ipmi_isa_init(ISABus *bus, int irq,
> +				 int type, QemuOpts *opts)
> +{
> +    ISADevice *dev;
> +
> +    dev = isa_try_create(bus, "isa-ipmi");
> +    if (!dev) {
> +        return false;
> +    }
> +    qdev_prop_set_uint32(&dev->qdev, "type", type);
> +    qdev_prop_set_uint32(&dev->qdev, "irq", irq);
> +    qdev_prop_set_ptr(&dev->qdev, "charopts", opts);
> +    if (qdev_init(&dev->qdev) < 0) {
> +        return false;
> +    }
> +    return true;
> +}
>  /* pc_sysfw.c */
>  void pc_system_firmware_init(MemoryRegion *rom_memory);
>  
> diff --git a/hw/smbios.h b/hw/smbios.h
> index 6431a15..b9e4a61 100644
> --- a/hw/smbios.h
> +++ b/hw/smbios.h
> @@ -155,6 +155,18 @@ struct smbios_type_32 {
>      uint8_t boot_status;
>  } QEMU_PACKED;
>  
> +/* SMBIOS type 38 - IPMI Device Information */
> +struct smbios_type_38 {
> +    struct smbios_structure_header header;
> +    uint8_t interface_type;
> +    uint8_t ipmi_version;
> +    uint8_t i2c_slave_addr;
> +    uint8_t nv_storage_dev_addr;
> +    uint64_t base_addr;
> +    uint8_t base_addr_mod_and_irq_info;
> +    uint8_t interrupt_number;
> +} QEMU_PACKED;
> +
>  /* SMBIOS type 127 -- End-of-table */
>  struct smbios_type_127 {
>      struct smbios_structure_header header;
>