igb: Fix DMA requester specification for Tx packet

igb used to specify the PF as DMA requester when reading Tx packets.
This made Tx requests from VFs to be performed on the address space of
the PF, defeating the purpose of SR-IOV. Add some logic to change the
requester depending on the queue, which can be assigned to a VF.

Fixes: 3a977deebe ("Intrdocue igb device emulation")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c
index 7708333c2a..78d30738e6 100644
--- a/hw/net/igb_core.c
+++ b/hw/net/igb_core.c
@@ -523,6 +523,7 @@ igb_on_tx_done_update_stats(IGBCore *core, struct NetTxPkt *tx_pkt)
 
 static void
 igb_process_tx_desc(IGBCore *core,
+                    PCIDevice *dev,
                     struct igb_tx *tx,
                     union e1000_adv_tx_desc *tx_desc,
                     int queue_index)
@@ -588,7 +589,7 @@ igb_process_tx_desc(IGBCore *core,
 
         tx->first = true;
         tx->skip_cp = false;
-        net_tx_pkt_reset(tx->tx_pkt);
+        net_tx_pkt_reset(tx->tx_pkt, dev);
     }
 }
 
@@ -803,6 +804,8 @@ igb_start_xmit(IGBCore *core, const IGB_TxRing *txr)
         d = core->owner;
     }
 
+    net_tx_pkt_reset(txr->tx->tx_pkt, d);
+
     while (!igb_ring_empty(core, txi)) {
         base = igb_ring_head_descr(core, txi);
 
@@ -811,7 +814,7 @@ igb_start_xmit(IGBCore *core, const IGB_TxRing *txr)
         trace_e1000e_tx_descr((void *)(intptr_t)desc.read.buffer_addr,
                               desc.read.cmd_type_len, desc.wb.status);
 
-        igb_process_tx_desc(core, txr->tx, &desc, txi->idx);
+        igb_process_tx_desc(core, d, txr->tx, &desc, txi->idx);
         igb_ring_advance(core, txi, 1);
         eic |= igb_txdesc_writeback(core, base, &desc, txi);
     }
@@ -3828,7 +3831,7 @@ igb_core_pci_realize(IGBCore        *core,
     core->vmstate = qemu_add_vm_change_state_handler(igb_vm_state_change, core);
 
     for (i = 0; i < IGB_NUM_QUEUES; i++) {
-        net_tx_pkt_init(&core->tx[i].tx_pkt, core->owner, E1000E_MAX_TX_FRAGS);
+        net_tx_pkt_init(&core->tx[i].tx_pkt, NULL, E1000E_MAX_TX_FRAGS);
     }
 
     net_rx_pkt_init(&core->rx_pkt);
@@ -3853,7 +3856,7 @@ igb_core_pci_uninit(IGBCore *core)
     qemu_del_vm_change_state_handler(core->vmstate);
 
     for (i = 0; i < IGB_NUM_QUEUES; i++) {
-        net_tx_pkt_reset(core->tx[i].tx_pkt);
+        net_tx_pkt_reset(core->tx[i].tx_pkt, NULL);
         net_tx_pkt_uninit(core->tx[i].tx_pkt);
     }
 
@@ -4026,7 +4029,7 @@ static void igb_reset(IGBCore *core, bool sw)
 
     for (i = 0; i < ARRAY_SIZE(core->tx); i++) {
         tx = &core->tx[i];
-        net_tx_pkt_reset(tx->tx_pkt);
+        net_tx_pkt_reset(tx->tx_pkt, NULL);
         memset(tx->ctx, 0, sizeof(tx->ctx));
         tx->first = true;
         tx->skip_cp = false;