Re: [Qemu-devel] [PATCH v2] audio: intel-hda: do not use old_mmio accesses

[Matt Parker <mtparkr@gmail.com>]

I've just noticed the suggested changes from the v1 patch regarding
using MAKE_64BIT_MASK.
This patch is can be ignored for now.

On 23 August 2017 at 20:37, Matt Parker <mtparkr@gmail.com> wrote:
> intel-hda is currently using the old_mmio accessors for io.
> This updates the device to use .read and .write accessors instead.
>
> Signed-off-by: Matt Parker <mtparkr@gmail.com>
> ---
>  hw/audio/intel-hda.c | 57 +++++++++-------------------------------------------
>  1 file changed, 10 insertions(+), 47 deletions(-)
>
> diff --git a/hw/audio/intel-hda.c b/hw/audio/intel-hda.c
> index 06acc98f7b..95e3e460fb 100644
> --- a/hw/audio/intel-hda.c
> +++ b/hw/audio/intel-hda.c
> @@ -1043,66 +1043,29 @@ static void intel_hda_regs_reset(IntelHDAState *d)
>
>  /* --------------------------------------------------------------------- */
>
> -static void intel_hda_mmio_writeb(void *opaque, hwaddr addr, uint32_t val)
> +static void intel_hda_mmio_write(void *opaque, hwaddr addr, uint64_t val,
> +                                 unsigned size)
>  {
>      IntelHDAState *d = opaque;
>      const IntelHDAReg *reg = intel_hda_reg_find(d, addr);
>
> -    intel_hda_reg_write(d, reg, val, 0xff);
> +    intel_hda_reg_write(d, reg, val, (1UL << (size * 8)) - 1);
>  }
>
> -static void intel_hda_mmio_writew(void *opaque, hwaddr addr, uint32_t val)
> +static uint64_t intel_hda_mmio_read(void *opaque, hwaddr addr, unsigned size)
>  {
>      IntelHDAState *d = opaque;
>      const IntelHDAReg *reg = intel_hda_reg_find(d, addr);
>
> -    intel_hda_reg_write(d, reg, val, 0xffff);
> -}
> -
> -static void intel_hda_mmio_writel(void *opaque, hwaddr addr, uint32_t val)
> -{
> -    IntelHDAState *d = opaque;
> -    const IntelHDAReg *reg = intel_hda_reg_find(d, addr);
> -
> -    intel_hda_reg_write(d, reg, val, 0xffffffff);
> -}
> -
> -static uint32_t intel_hda_mmio_readb(void *opaque, hwaddr addr)
> -{
> -    IntelHDAState *d = opaque;
> -    const IntelHDAReg *reg = intel_hda_reg_find(d, addr);
> -
> -    return intel_hda_reg_read(d, reg, 0xff);
> -}
> -
> -static uint32_t intel_hda_mmio_readw(void *opaque, hwaddr addr)
> -{
> -    IntelHDAState *d = opaque;
> -    const IntelHDAReg *reg = intel_hda_reg_find(d, addr);
> -
> -    return intel_hda_reg_read(d, reg, 0xffff);
> -}
> -
> -static uint32_t intel_hda_mmio_readl(void *opaque, hwaddr addr)
> -{
> -    IntelHDAState *d = opaque;
> -    const IntelHDAReg *reg = intel_hda_reg_find(d, addr);
> -
> -    return intel_hda_reg_read(d, reg, 0xffffffff);
> +    return intel_hda_reg_read(d, reg, (1UL << (size * 8)) - 1);
>  }
>
>  static const MemoryRegionOps intel_hda_mmio_ops = {
> -    .old_mmio = {
> -        .read = {
> -            intel_hda_mmio_readb,
> -            intel_hda_mmio_readw,
> -            intel_hda_mmio_readl,
> -        },
> -        .write = {
> -            intel_hda_mmio_writeb,
> -            intel_hda_mmio_writew,
> -            intel_hda_mmio_writel,
> -        },
> +    .read = intel_hda_mmio_read,
> +    .write = intel_hda_mmio_write,
> +    .impl = {
> +        .min_access_size = 1,
> +        .max_access_size = 4,
>      },
>      .endianness = DEVICE_NATIVE_ENDIAN,
>  };
> --
> 2.13.2
>