Changeset 55227 in vbox for trunk

Timestamp:

Apr 13, 2015 10:14:23 PM (10 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

99534

Message:

WDDM: command buffer size adjustment.

File:

• trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/VBoxMPWddm.cpp (modified) (1 diff)

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

@@ -901 +901 @@
                             - VBVA_ADAPTER_INFORMATION_SIZE;
 
-    ULONG cbCmdVbva = cbAvailable / 2;
-    ULONG cbCmdVbvaApprox = VBOXCMDVBVA_BUFFERSIZE(4096);
-    if (cbCmdVbvaApprox > cbCmdVbva)
-    {
-        WARN(("too few VRAM memory %d, cmdVbva %d, while approximately needed %d, trying to adjust", cbAvailable, cbCmdVbva, cbCmdVbvaApprox));
-        cbCmdVbva = cbCmdVbvaApprox;
-    }
-
-    cbCmdVbva = VBOXWDDM_ROUNDBOUND(cbCmdVbva, 0x1000);
-    if (cbCmdVbva > cbAvailable - 0x1000)
+    /* Size of the VBVA buffer which is used to pass VBOXCMDVBVA_* commands to the host.
+     * Estimate max 4KB per command.
+     */
+    ULONG cbCmdVbva = VBOXCMDVBVA_BUFFERSIZE(4096);
+
+    if (cbCmdVbva >= cbAvailable)
     {
         WARN(("too few VRAM memory fatal, %d, requested for CmdVbva %d", cbAvailable, cbCmdVbva));