Changeset 100010 in vbox for trunk/src/VBox/Additions

Timestamp:

May 30, 2023 9:55:50 AM (20 months ago)

Author:

vboxsync

Message:

WDDM: SVGADevCapRead. bugref:9845

Location:

trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/gallium

Files:

• Svga.cpp (modified) (1 diff)
• SvgaHw.h (modified) (1 diff)

trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/gallium/Svga.cpp

@@ -497 +497 @@
     {
         for (i = 0; i < RT_ELEMENTS(pSvgaInfo->au32Caps); ++i)
-        {
-            SVGARegWrite(pSvga, SVGA_REG_DEV_CAP, i);
-            pSvgaInfo->au32Caps[i] = SVGARegRead(pSvga, SVGA_REG_DEV_CAP);
-        }
+            pSvgaInfo->au32Caps[i] = SVGADevCapRead(pSvga, i);
     }
 

trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/gallium/SvgaHw.h

@@ -76 +76 @@
 }
 
+DECLINLINE(uint32_t) SVGADevCapRead(PVBOXWDDM_EXT_VMSVGA pSvga, uint32_t idx)
+{
+    KIRQL OldIrql;
+    KeAcquireSpinLock(&pSvga->HwSpinLock, &OldIrql);
+
+    ASMOutU32(SVGAPort(pSvga, SVGA_INDEX_PORT), SVGA_REG_DEV_CAP);
+    ASMOutU32(SVGAPort(pSvga, SVGA_VALUE_PORT), idx);
+    uint32_t const u32Value = ASMInU32(SVGAPort(pSvga, SVGA_VALUE_PORT));
+
+    KeReleaseSpinLock(&pSvga->HwSpinLock, OldIrql);
+    return u32Value;
+}
+
 DECLINLINE(volatile void *) SVGAFifoPtrFromOffset(PVBOXWDDM_EXT_VMSVGA pSvga, uint32_t u32Offset)
 {