Changeset 109188 in vbox for trunk/src/VBox/Devices/VirtIO/VirtioCore.h

Timestamp:

May 7, 2025 7:42:49 AM (3 days ago)

Author:

vboxsync

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

168752

Message:

VirtioNet: Temporary code from 7.0 branch for debugging descriptor loop issue ​bugref:10572

File:

• trunk/src/VBox/Devices/VirtIO/VirtioCore.h (modified) (3 diffs)

trunk/src/VBox/Devices/VirtIO/VirtioCore.h

@@ -36 +36 @@
 #include <iprt/sg.h>
 #include <iprt/types.h>
+
+/*
+ * WARNING! NEVER ENABLE IN PRODUCTION BUILDS!
+ * Enables temporary printouts to release log in descriptor chain handling code.
+ */
+//#define VIRTIO_REL_INFO_DUMP 1
 
 #ifdef LOG_ENABLED
@@ -458 +464 @@
     uint16_t                    uIrqMmio;                         /**< The interrupt number when Virtio-over-MMIO is used */
     uint8_t                     uDeviceType;                      /**< The implemented device type for Virtio-over-MMIO   */
+#ifdef VIRTIO_REL_INFO_DUMP
+    bool                        fRecovering;
+    bool                        fTestRecovery;
+#define VIRTIO_CORE_TRACE_BUF_SIZE (256 /* header */ + 256 * 256 /* buffer*/)
+    RTTRACEBUF                  hTraceBuf;
+    uint8_t                     aTraceBuf[VIRTIO_CORE_TRACE_BUF_SIZE];
+#endif /* VIRTIO_REL_INFO_DUMP */
 
     /** @name The locations of the capability structures in PCI config space and the BAR.
@@ -782 +795 @@
  */
 DECLHIDDEN(uint16_t) virtioCoreVirtqAvailBufCount(PPDMDEVINS pDevIns, PVIRTIOCORE pVirtio, uint16_t uVirtqNbr);
+
+#ifdef VIRTIO_REL_INFO_DUMP
+/**
+ * Copies all available chains to used ring. Only indices of chains are copied, not the chains
+ * themselves. This can only be done for virtionet TX ring to work around the issue in NetKVM
+ * driver, which does not complete NBLs on device reset, if these NBLs are already in 'avail' ring.
+ *
+ * @param   pDevIns     The device instance.
+ * @param   pVirtio     Pointer to the shared virtio state.
+ * @param   uVirtqNbr   Virtqueue to modify.
+ */
+void virtioCorePutAllAvailBufsToUsedRing(PPDMDEVINS pDevIns, PVIRTIOCORE pVirtio, uint16_t uVirtqNbr);
+#endif /* VIRTIO_REL_INFO_DUMP */
 
 /**