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[PATCH 3/6] acpi: factor out acpi_dsdt_add_fw_cfg()

Gerd Hoffmann posted 6 patches 5 years, 10 months ago
Maintainers: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Richard Henderson <rth@twiddle.net>, Paolo Bonzini <pbonzini@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>
There is a newer version of this series
[PATCH 3/6] acpi: factor out acpi_dsdt_add_fw_cfg()
Posted by Gerd Hoffmann 5 years, 10 months ago 
Add helper function to add fw_cfg device.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/i386/acpi-build-pc.c | 51 ++++++++++++++++++++++-------------------
 1 file changed, 28 insertions(+), 23 deletions(-)

diff --git a/hw/i386/acpi-build-pc.c b/hw/i386/acpi-build-pc.c
index a9dbf080566b..3fdae2984b91 100644
--- a/hw/i386/acpi-build-pc.c
+++ b/hw/i386/acpi-build-pc.c
@@ -1809,6 +1809,33 @@ static void build_smb0(Aml *table, I2CBus *smbus, int devnr, int func)
     aml_append(table, scope);
 }
 
+static void acpi_dsdt_add_fw_cfg(Aml *scope, FWCfgState *fw_cfg)
+{
+    /*
+     * when using port i/o, the 8-bit data register *always* overlaps
+     * with half of the 16-bit control register. Hence, the total size
+     * of the i/o region used is FW_CFG_CTL_SIZE; when using DMA, the
+     * DMA control register is located at FW_CFG_DMA_IO_BASE + 4
+     */
+    Object *obj = OBJECT(fw_cfg);
+    uint8_t io_size = object_property_get_bool(obj, "dma_enabled", NULL) ?
+        ROUND_UP(FW_CFG_CTL_SIZE, 4) + sizeof(dma_addr_t) :
+        FW_CFG_CTL_SIZE;
+    Aml *dev = aml_device("FWCF");
+    Aml *crs = aml_resource_template();
+
+    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
+
+    /* device present, functioning, decoding, not shown in UI */
+    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
+
+    aml_append(crs,
+        aml_io(AML_DECODE16, FW_CFG_IO_BASE, FW_CFG_IO_BASE, 0x01, io_size));
+
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
+
 static void
 build_dsdt(GArray *table_data, BIOSLinker *linker,
            AcpiPmInfo *pm, AcpiMiscInfo *misc,
@@ -2088,30 +2115,8 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
 
     /* create fw_cfg node, unconditionally */
     {
-        /* when using port i/o, the 8-bit data register *always* overlaps
-         * with half of the 16-bit control register. Hence, the total size
-         * of the i/o region used is FW_CFG_CTL_SIZE; when using DMA, the
-         * DMA control register is located at FW_CFG_DMA_IO_BASE + 4 */
-        uint8_t io_size = object_property_get_bool(OBJECT(x86ms->fw_cfg),
-                                                   "dma_enabled", NULL) ?
-                          ROUND_UP(FW_CFG_CTL_SIZE, 4) + sizeof(dma_addr_t) :
-                          FW_CFG_CTL_SIZE;
-
         scope = aml_scope("\\_SB.PCI0");
-        dev = aml_device("FWCF");
-
-        aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
-
-        /* device present, functioning, decoding, not shown in UI */
-        aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
-
-        crs = aml_resource_template();
-        aml_append(crs,
-            aml_io(AML_DECODE16, FW_CFG_IO_BASE, FW_CFG_IO_BASE, 0x01, io_size)
-        );
-        aml_append(dev, aml_name_decl("_CRS", crs));
-
-        aml_append(scope, dev);
+        acpi_dsdt_add_fw_cfg(scope, x86ms->fw_cfg);
         aml_append(dsdt, scope);
     }
 
-- 
2.18.2
Re: [PATCH 3/6] acpi: factor out acpi_dsdt_add_fw_cfg()
Posted by Igor Mammedov 5 years, 10 months ago 
On Fri, 27 Mar 2020 13:11:08 +0100
Gerd Hoffmann <kraxel@redhat.com> wrote:

> Add helper function to add fw_cfg device.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  hw/i386/acpi-build-pc.c | 51 ++++++++++++++++++++++-------------------
>  1 file changed, 28 insertions(+), 23 deletions(-)
> 
> diff --git a/hw/i386/acpi-build-pc.c b/hw/i386/acpi-build-pc.c
> index a9dbf080566b..3fdae2984b91 100644
> --- a/hw/i386/acpi-build-pc.c
> +++ b/hw/i386/acpi-build-pc.c
> @@ -1809,6 +1809,33 @@ static void build_smb0(Aml *table, I2CBus *smbus, int devnr, int func)
>      aml_append(table, scope);
>  }
>  
> +static void acpi_dsdt_add_fw_cfg(Aml *scope, FWCfgState *fw_cfg)
> +{
> +    /*
> +     * when using port i/o, the 8-bit data register *always* overlaps
> +     * with half of the 16-bit control register. Hence, the total size
> +     * of the i/o region used is FW_CFG_CTL_SIZE; when using DMA, the
> +     * DMA control register is located at FW_CFG_DMA_IO_BASE + 4
> +     */
> +    Object *obj = OBJECT(fw_cfg);
> +    uint8_t io_size = object_property_get_bool(obj, "dma_enabled", NULL) ?
> +        ROUND_UP(FW_CFG_CTL_SIZE, 4) + sizeof(dma_addr_t) :
> +        FW_CFG_CTL_SIZE;
> +    Aml *dev = aml_device("FWCF");
> +    Aml *crs = aml_resource_template();
> +
> +    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
> +
> +    /* device present, functioning, decoding, not shown in UI */
> +    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
> +
> +    aml_append(crs,
> +        aml_io(AML_DECODE16, FW_CFG_IO_BASE, FW_CFG_IO_BASE, 0x01, io_size));
> +
> +    aml_append(dev, aml_name_decl("_CRS", crs));
> +    aml_append(scope, dev);
> +}
> +
>  static void
>  build_dsdt(GArray *table_data, BIOSLinker *linker,
>             AcpiPmInfo *pm, AcpiMiscInfo *misc,
> @@ -2088,30 +2115,8 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
>  
>      /* create fw_cfg node, unconditionally */
>      {
> -        /* when using port i/o, the 8-bit data register *always* overlaps
> -         * with half of the 16-bit control register. Hence, the total size
> -         * of the i/o region used is FW_CFG_CTL_SIZE; when using DMA, the
> -         * DMA control register is located at FW_CFG_DMA_IO_BASE + 4 */
> -        uint8_t io_size = object_property_get_bool(OBJECT(x86ms->fw_cfg),
> -                                                   "dma_enabled", NULL) ?
> -                          ROUND_UP(FW_CFG_CTL_SIZE, 4) + sizeof(dma_addr_t) :
> -                          FW_CFG_CTL_SIZE;
> -
>          scope = aml_scope("\\_SB.PCI0");
> -        dev = aml_device("FWCF");
> -
> -        aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
> -
> -        /* device present, functioning, decoding, not shown in UI */
> -        aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
> -
> -        crs = aml_resource_template();
> -        aml_append(crs,
> -            aml_io(AML_DECODE16, FW_CFG_IO_BASE, FW_CFG_IO_BASE, 0x01, io_size)
> -        );
> -        aml_append(dev, aml_name_decl("_CRS", crs));
> -
> -        aml_append(scope, dev);
> +        acpi_dsdt_add_fw_cfg(scope, x86ms->fw_cfg);
>          aml_append(dsdt, scope);
>      }
>

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