Changeset 41811 in vbox for trunk/src/VBox/Devices/Bus

Timestamp:

Jun 18, 2012 9:50:23 AM (13 years ago)

Author:

vboxsync

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

78629

Message:

PCI/DevATA: Added bus mastering support.

File:

• trunk/src/VBox/Devices/Bus/DevPCI.cpp (modified) (2 diffs)

trunk/src/VBox/Devices/Bus/DevPCI.cpp

@@ -242 +242 @@
 
 #ifdef IN_RING3
+/**
+ * Reads data via bus mastering, if enabled. If no bus mastering is available,
+ * this function does nothing and returns VINF_SUCCESS.
+ *
+ * @return  IPRT status code.
+ */
+int PCIDevPhysRead(PPCIDEVICE pPciDev, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead)
+{
+    AssertPtrReturn(pPciDev, VERR_INVALID_POINTER);
+    AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
+    AssertReturn(cbRead, VERR_INVALID_PARAMETER);
+
+    if (!PCIDevIsBusmaster(pPciDev))
+    {
+#ifdef DEBUG
+        Log2(("%s: %RU16:%RU16: No bus master (anymore), skipping read %p (%z)\n", __FUNCTION__,
+              PCIDevGetVendorId(pPciDev), PCIDevGetDeviceId(pPciDev), pvBuf, cbRead));
+#endif
+        return VINF_SUCCESS;
+    }
+
+    return PDMDevHlpPhysRead(pPciDev->pDevIns, GCPhys, pvBuf, cbRead);
+}
+
+/**
+ * Writes data via bus mastering, if enabled. If no bus mastering is available,
+ * this function does nothing and returns VINF_SUCCESS.
+ *
+ * @return  IPRT status code.
+ */
+int PCIDevPhysWrite(PPCIDEVICE pPciDev, RTGCPHYS GCPhys, const void *pvBuf, size_t cbWrite)
+{
+    AssertPtrReturn(pPciDev, VERR_INVALID_POINTER);
+    AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
+    AssertReturn(cbWrite, VERR_INVALID_PARAMETER);
+
+    if (!PCIDevIsBusmaster(pPciDev))
+    {
+#ifdef DEBUG
+        Log2(("%s: %RU16:%RU16: No bus master (anymore), skipping write %p (%z)\n", __FUNCTION__,
+              PCIDevGetVendorId(pPciDev), PCIDevGetDeviceId(pPciDev), pvBuf, cbWrite));
+#endif
+        return VINF_SUCCESS;
+    }
+
+    return PDMDevHlpPhysWrite(pPciDev->pDevIns, GCPhys, pvBuf, cbWrite);
+}
 
 static void pci_update_mappings(PCIDevice *d)
@@ -758 +805 @@
 
 #ifdef IN_RING3
-
 /**
  * Finds a bridge on the bus which contains the destination bus.