rocker: add new rocker switch device

Rocker is a simulated ethernet switch device.  The device supports up to 62
front-panel ports and supports L2 switching and L3 routing functions, as well
as L2/L3/L4 ACLs.  The device presents a single PCI device for each switch,
with a memory-mapped register space for device driver access.

Rocker device is invoked with -device, for example a 4-port switch:

  -device rocker,name=sw1,len-ports=4,ports[0]=dev0,ports[1]=dev1, \
         ports[2]=dev2,ports[3]=dev3

Each port is a netdev and can be paired with using -netdev id=<port name>.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David Ahern <dsahern@gmail.com>
Message-id: 1426306173-24884-7-git-send-email-sfeldma@gmail.com

rocker: fix clang compiler errors

Consolidate all forward typedef declarations to rocker.h.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>

rocker: add support for flow modification

We had support for flow add/del.  This adds support for flow mod.  I needed
this for L3 support where an existing route is modified using NLM_F_REPLACE.
For example:

  ip route add 12.0.0.0/30 nexthop via 11.0.0.1 dev swp1
  ip route change 12.0.0.0/30 nexthop via 11.0.0.9 dev swp2

The first cmd adds the route.  The second cmd changes the existing route by
changing its nexthop info.

In the device, a mod operation results in the matching flow enty being modified
with the new settings.  This is atomic to the device.

Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/hw/net/rocker/rocker_desc.h b/hw/net/rocker/rocker_desc.h
new file mode 100644
index 0000000..d4041f5
--- /dev/null
+++ b/hw/net/rocker/rocker_desc.h
@@ -0,0 +1,53 @@
+/*
+ * QEMU rocker switch emulation - Descriptor ring support
+ *
+ * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+
+#ifndef _ROCKER_DESC_H_
+#define _ROCKER_DESC_H_
+
+#include "rocker_hw.h"
+
+typedef int (desc_ring_consume)(Rocker *r, DescInfo *info);
+
+uint16_t desc_buf_size(DescInfo *info);
+uint16_t desc_tlv_size(DescInfo *info);
+char *desc_get_buf(DescInfo *info, bool read_only);
+int desc_set_buf(DescInfo *info, size_t tlv_size);
+DescRing *desc_get_ring(DescInfo *info);
+
+int desc_ring_index(DescRing *ring);
+bool desc_ring_set_base_addr(DescRing *ring, uint64_t base_addr);
+uint64_t desc_ring_get_base_addr(DescRing *ring);
+bool desc_ring_set_size(DescRing *ring, uint32_t size);
+uint32_t desc_ring_get_size(DescRing *ring);
+bool desc_ring_set_head(DescRing *ring, uint32_t new);
+uint32_t desc_ring_get_head(DescRing *ring);
+uint32_t desc_ring_get_tail(DescRing *ring);
+void desc_ring_set_ctrl(DescRing *ring, uint32_t val);
+bool desc_ring_ret_credits(DescRing *ring, uint32_t credits);
+uint32_t desc_ring_get_credits(DescRing *ring);
+
+DescInfo *desc_ring_fetch_desc(DescRing *ring);
+bool desc_ring_post_desc(DescRing *ring, int status);
+
+void desc_ring_set_consume(DescRing *ring, desc_ring_consume *consume,
+                           unsigned vector);
+unsigned desc_ring_get_msix_vector(DescRing *ring);
+DescRing *desc_ring_alloc(Rocker *r, int index);
+void desc_ring_free(DescRing *ring);
+void desc_ring_reset(DescRing *ring);
+
+#endif