Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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* tag 'net-pull-request' of https://github.com/jasowang/qemu:
  virtio: del net client if net_init_tap_one failed
  vdpa: Allow MQ feature in SVQ
  virtio-net: Update virtio-net curr_queue_pairs in vdpa backends
  vdpa: validate MQ CVQ commands
  vdpa: Add vhost_vdpa_net_load_mq
  vdpa: extract vhost_vdpa_net_load_mac from vhost_vdpa_net_load
  vdpa: Make VhostVDPAState cvq_cmd_in_buffer control ack type
  e1000e: set RX desc status with DD flag in a separate operation

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

2 files changed, 58 insertions, 12 deletions

diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c
index 82aa61fedc..fc9cdb4528 100644
--- a/hw/net/e1000e_core.c
+++ b/hw/net/e1000e_core.c
@@ -1364,6 +1364,57 @@ struct NetRxPkt *pkt, const E1000E_RSSInfo *rss_info,
     }
 }
 
+static inline void
+e1000e_pci_dma_write_rx_desc(E1000ECore *core, dma_addr_t addr,
+                             uint8_t *desc, dma_addr_t len)
+{
+    PCIDevice *dev = core->owner;
+
+    if (e1000e_rx_use_legacy_descriptor(core)) {
+        struct e1000_rx_desc *d = (struct e1000_rx_desc *) desc;
+        size_t offset = offsetof(struct e1000_rx_desc, status);
+        uint8_t status = d->status;
+
+        d->status &= ~E1000_RXD_STAT_DD;
+        pci_dma_write(dev, addr, desc, len);
+
+        if (status & E1000_RXD_STAT_DD) {
+            d->status = status;
+            pci_dma_write(dev, addr + offset, &status, sizeof(status));
+        }
+    } else {
+        if (core->mac[RCTL] & E1000_RCTL_DTYP_PS) {
+            union e1000_rx_desc_packet_split *d =
+                (union e1000_rx_desc_packet_split *) desc;
+            size_t offset = offsetof(union e1000_rx_desc_packet_split,
+                wb.middle.status_error);
+            uint32_t status = d->wb.middle.status_error;
+
+            d->wb.middle.status_error &= ~E1000_RXD_STAT_DD;
+            pci_dma_write(dev, addr, desc, len);
+
+            if (status & E1000_RXD_STAT_DD) {
+                d->wb.middle.status_error = status;
+                pci_dma_write(dev, addr + offset, &status, sizeof(status));
+            }
+        } else {
+            union e1000_rx_desc_extended *d =
+                (union e1000_rx_desc_extended *) desc;
+            size_t offset = offsetof(union e1000_rx_desc_extended,
+                wb.upper.status_error);
+            uint32_t status = d->wb.upper.status_error;
+
+            d->wb.upper.status_error &= ~E1000_RXD_STAT_DD;
+            pci_dma_write(dev, addr, desc, len);
+
+            if (status & E1000_RXD_STAT_DD) {
+                d->wb.upper.status_error = status;
+                pci_dma_write(dev, addr + offset, &status, sizeof(status));
+            }
+        }
+    }
+}
+
 typedef struct e1000e_ba_state_st {
     uint16_t written[MAX_PS_BUFFERS];
     uint8_t cur_idx;
@@ -1600,7 +1651,7 @@ e1000e_write_packet_to_guest(E1000ECore *core, struct NetRxPkt *pkt,
 
         e1000e_write_rx_descr(core, desc, is_last ? core->rx_pkt : NULL,
                            rss_info, do_ps ? ps_hdr_len : 0, &bastate.written);
-        pci_dma_write(d, base, &desc, core->rx_desc_len);
+        e1000e_pci_dma_write_rx_desc(core, base, desc, core->rx_desc_len);
 
         e1000e_ring_advance(core, rxi,
                             core->rx_desc_len / E1000_MIN_RX_DESC_LEN);
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index dd0d056fde..63a8332cd0 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1412,19 +1412,14 @@ static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd,
         return VIRTIO_NET_ERR;
     }
 
-    /* Avoid changing the number of queue_pairs for vdpa device in
-     * userspace handler. A future fix is needed to handle the mq
-     * change in userspace handler with vhost-vdpa. Let's disable
-     * the mq handling from userspace for now and only allow get
-     * done through the kernel. Ripples may be seen when falling
-     * back to userspace, but without doing it qemu process would
-     * crash on a recursive entry to virtio_net_set_status().
-     */
+    n->curr_queue_pairs = queue_pairs;
     if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_VHOST_VDPA) {
-        return VIRTIO_NET_ERR;
+        /*
+         * Avoid updating the backend for a vdpa device: We're only interested
+         * in updating the device model queues.
+         */
+        return VIRTIO_NET_OK;
     }
-
-    n->curr_queue_pairs = queue_pairs;
     /* stop the backend before changing the number of queue_pairs to avoid handling a
      * disabled queue */
     virtio_net_set_status(vdev, vdev->status);