New upstream version 18.08

[deb_dpdk.git] / kernel / linux / kni / kni_net.c

diff --git a/lib/librte_eal/linuxapp/kni/kni_net.c b/kernel/linux/kni/kni_net.c
similarity index 94%
rename from lib/librte_eal/linuxapp/kni/kni_net.c
rename to kernel/linux/kni/kni_net.c
index 9f9b798..7fcfa10 100644 (file)
--- a/lib/librte_eal/linuxapp/kni/kni_net.c
+++ b/kernel/linux/kni/kni_net.c
@@ -163,6 +163,46 @@ kni_net_release(struct net_device *dev)
        return (ret == 0) ? req.result : ret;
 }
 
+static void
+kni_fifo_trans_pa2va(struct kni_dev *kni,
+       struct rte_kni_fifo *src_pa, struct rte_kni_fifo *dst_va)
+{
+       uint32_t ret, i, num_dst, num_rx;
+       void *kva;
+       do {
+               num_dst = kni_fifo_free_count(dst_va);
+               if (num_dst == 0)
+                       return;
+
+               num_rx = min_t(uint32_t, num_dst, MBUF_BURST_SZ);
+
+               num_rx = kni_fifo_get(src_pa, kni->pa, num_rx);
+               if (num_rx == 0)
+                       return;
+
+               for (i = 0; i < num_rx; i++) {
+                       kva = pa2kva(kni->pa[i]);
+                       kni->va[i] = pa2va(kni->pa[i], kva);
+               }
+
+               ret = kni_fifo_put(dst_va, kni->va, num_rx);
+               if (ret != num_rx) {
+                       /* Failing should not happen */
+                       pr_err("Fail to enqueue entries into dst_va\n");
+                       return;
+               }
+       } while (1);
+}
+
+/* Try to release mbufs when kni release */
+void kni_net_release_fifo_phy(struct kni_dev *kni)
+{
+       /* release rx_q first, because it can't release in userspace */
+       kni_fifo_trans_pa2va(kni, kni->rx_q, kni->free_q);
+       /* release alloc_q for speeding up kni release in userspace */
+       kni_fifo_trans_pa2va(kni, kni->alloc_q, kni->free_q);
+}
+
 /*
  * Configuration changes (passed on by ifconfig)
  */