virtio: add modern device support

Type: feature

Change-Id: I205f7c146a213d603d9d1e46fcf5195a876608dc
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

1 files changed, 125 insertions, 0 deletions

diff --git a/src/vnet/devices/virtio/virtio_pci_modern.h b/src/vnet/devices/virtio/virtio_pci_modern.h
new file mode 100644
index 00000000000..f6a8713984f
--- /dev/null
+++ b/src/vnet/devices/virtio/virtio_pci_modern.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/devices/virtio/virtio.h>
+#include <vnet/devices/virtio/pci.h>
+
+/* common configuration */
+#define VIRTIO_FEATURE_SELECT_HI 1
+#define VIRTIO_FEATURE_SELECT_LO 0
+
+#define VIRTIO_DEVICE_FEATURE_SELECT_OFFSET(v)                    \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					 device_feature_select))
+#define VIRTIO_DEVICE_FEATURE_OFFSET(v)                           \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					        device_feature))
+#define VIRTIO_DRIVER_FEATURE_SELECT_OFFSET(v)                    \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					 driver_feature_select))
+#define VIRTIO_DRIVER_FEATURE_OFFSET(v)                           \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					        driver_feature))
+#define VIRTIO_MSIX_CONFIG_VECTOR_OFFSET(v)                       \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					           msix_config))
+#define VIRTIO_NUM_QUEUES_OFFSET(v)                               \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					            num_queues))
+#define VIRTIO_DEVICE_STATUS_OFFSET(v)                            \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					         device_status))
+#define VIRTIO_CONFIG_GENERATION_OFFSET(v)                        \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					     config_generation))
+#define VIRTIO_QUEUE_SELECT_OFFSET(v)                             \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					          queue_select))
+#define VIRTIO_QUEUE_SIZE_OFFSET(v)                               \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					            queue_size))
+#define VIRTIO_QUEUE_MSIX_VECTOR_OFFSET(v)                        \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					     queue_msix_vector))
+#define VIRTIO_QUEUE_ENABLE_OFFSET(v)                             \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					          queue_enable))
+#define VIRTIO_QUEUE_NOTIFY_OFF_OFFSET(v)                         \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					      queue_notify_off))
+#define VIRTIO_QUEUE_DESC_OFFSET(v)                               \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					            queue_desc))
+#define VIRTIO_QUEUE_DRIVER_OFFSET(v)                             \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					          queue_driver))
+#define VIRTIO_QUEUE_DEVICE_OFFSET(v)                             \
+   (v->common_offset + STRUCT_OFFSET_OF (virtio_pci_common_cfg_t, \
+					          queue_device))
+/* device configuration */
+#define VIRTIO_MAC_OFFSET(v)                                      \
+   (v->device_offset + STRUCT_OFFSET_OF (virtio_net_config_t,     \
+					                   mac))
+#define VIRTIO_STATUS_OFFSET(v)                                   \
+   (v->device_offset + STRUCT_OFFSET_OF (virtio_net_config_t,     \
+					                status))
+#define VIRTIO_MAX_VIRTQUEUE_PAIRS_OFFSET(v)                      \
+   (v->device_offset + STRUCT_OFFSET_OF (virtio_net_config_t,     \
+					   max_virtqueue_pairs))
+#define VIRTIO_MTU_OFFSET(v)                                      \
+   (v->device_offset + STRUCT_OFFSET_OF (virtio_net_config_t,     \
+					                   mtu))
+/* interrupt service routine */
+#define VIRTIO_ISR_OFFSET(v) (v->isr_offset)
+/* notification */
+#define VIRTIO_NOTIFICATION_OFFSET(v) (v->notify_offset)
+
+#define _(t)                                                         \
+static_always_inline t                                               \
+virtio_pci_reg_read_##t (virtio_if_t * vif, u32 offset)              \
+{                                                                    \
+  t val;                                                             \
+  val = *(volatile t *) (vif->bar + offset);		             \
+  return val;                                                        \
+}
+
+_(u64);
+_(u32);
+_(u16);
+_(u8);
+
+#undef _
+
+#define _(t)                                                         \
+static_always_inline void                                            \
+virtio_pci_reg_write_##t (virtio_if_t * vif, u32 offset, t val)      \
+{                                                                    \
+  *(volatile t *) ((u8 *) vif->bar + offset) = val;	             \
+}
+
+_(u64);
+_(u32);
+_(u16);
+_(u8);
+
+#undef _
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */