intel-hda: add msi support

This patch adds MSI support to the intel hda audio driver.  It is
enabled by default, use '-device intel-hda,msi=0' to disable it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/intel-hda.c |   30 ++++++++++++++++++++++++++++--
 1 files changed, 28 insertions(+), 2 deletions(-)

On Mon, 8 Nov 2010, Gerd Hoffmann wrote:

> This patch adds MSI support to the intel hda audio driver.  It is
> enabled by default, use '-device intel-hda,msi=0' to disable it.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  hw/intel-hda.c |   30 ++++++++++++++++++++++++++++--
>  1 files changed, 28 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/intel-hda.c b/hw/intel-hda.c
> index e478e67..8990ebb 100644
> --- a/hw/intel-hda.c
> +++ b/hw/intel-hda.c
> @@ -19,6 +19,7 @@
>  
>  #include "hw.h"
>  #include "pci.h"
> +#include "msi.h"
>  #include "qemu-timer.h"
>  #include "audiodev.h"
>  #include "intel-hda.h"
> @@ -188,6 +189,7 @@ struct IntelHDAState {
>  
>      /* properties */
>      uint32_t debug;
> +    uint32_t msi;
>  };
>  
>  struct IntelHDAReg {
> @@ -268,6 +270,7 @@ static void intel_hda_update_int_sts(IntelHDAState *d)
>  
>  static void intel_hda_update_irq(IntelHDAState *d)
>  {
> +    int msi = d->msi && msi_enabled(&d->pci);
>      int level;
>  
>      intel_hda_update_int_sts(d);
> @@ -276,8 +279,15 @@ static void intel_hda_update_irq(IntelHDAState *d)
>      } else {
>          level = 0;
>      }
> -    dprint(d, 2, "%s: level %d\n", __FUNCTION__, level);
> -    qemu_set_irq(d->pci.irq[0], level);
> +    dprint(d, 2, "%s: level %d [%s]\n", __FUNCTION__,
> +           level, msi ? "msi" : "intx");
> +    if (msi) {
> +        if (level) {
> +            msi_notify(&d->pci, 0);
> +        }
> +    } else {
> +        qemu_set_irq(d->pci.irq[0], level);
> +    }
>  }
>  
>  static int intel_hda_send_command(IntelHDAState *d, uint32_t verb)
> @@ -1148,6 +1158,8 @@ static int intel_hda_init(PCIDevice *pci)
>                                            intel_hda_mmio_write, d);
>      pci_register_bar(&d->pci, 0, 0x4000, PCI_BASE_ADDRESS_SPACE_MEMORY,
>                       intel_hda_map);
> +    if (d->msi)
> +        msi_init(&d->pci, 0x50, 1, true, false);

Braces

>  
>      hda_codec_bus_init(&d->pci.qdev, &d->codecs,
>                         intel_hda_response, intel_hda_xfer);
> @@ -1159,10 +1171,22 @@ static int intel_hda_exit(PCIDevice *pci)
>  {
>      IntelHDAState *d = DO_UPCAST(IntelHDAState, pci, pci);
>  
> +    if (d->msi)
> +        msi_uninit(&d->pci);

Likewise

>      cpu_unregister_io_memory(d->mmio_addr);
>      return 0;
>  }
>  
> +static void intel_hda_write_config(PCIDevice *pci, uint32_t addr,
> +                                   uint32_t val, int len)
> +{
> +    IntelHDAState *d = DO_UPCAST(IntelHDAState, pci, pci);
> +
> +    pci_default_write_config(pci, addr, val, len);
> +    if (d->msi)
> +        msi_write_config(pci, addr, val, len);
> +}
> +
>  static int intel_hda_post_load(void *opaque, int version)
>  {
>      IntelHDAState* d = opaque;
> @@ -1246,8 +1270,10 @@ static PCIDeviceInfo intel_hda_info = {
>      .qdev.reset   = intel_hda_reset,
>      .init         = intel_hda_init,
>      .exit         = intel_hda_exit,
> +    .config_write = intel_hda_write_config,
>      .qdev.props   = (Property[]) {
>          DEFINE_PROP_UINT32("debug", IntelHDAState, debug, 0),
> +        DEFINE_PROP_UINT32("msi", IntelHDAState, msi, 1),
>          DEFINE_PROP_END_OF_LIST(),
>      }
>  };
>