Changeset 1c53d93 in mainline for uspace/lib/virtio/virtio-pci.h

Timestamp:

2018-05-22T19:06:50Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

cbcb34c

Parents:

659bd24

git-author:

Jakub Jermar <jakub@…> (2018-05-03 18:50:49)

git-committer:

Jakub Jermar <jakub@…> (2018-05-22 19:06:50)

Message:

Add Virtqueue definitions

File:

• uspace/lib/virtio/virtio-pci.h (modified) (2 diffs)

uspace/lib/virtio/virtio-pci.h

@@ -58 +58 @@
 #define VIRTIO_DEV_STATUS_FAILED                128
 
-/** Common configuration structure layout according to VIRTIO v1. */
+/** Common configuration structure layout according to VIRTIO version 1.0 */
 typedef struct virtio_pci_common_cfg {
         ioport32_t device_feature_select;
@@ -78 +78 @@
 } virtio_pci_common_cfg_t;
 
+/** The buffer continues in the next descriptor */
+#define VIRTQ_DESC_F_NEXT       1
+/** Device write-only buffer */
+#define VIRTQ_DESC_F_WRITE      2
+/** Buffer contains a list of buffer descriptors */
+#define VIRTQ_DESC_F_INDIRECT   4
+
+/** Virtqueue Descriptor structure as per VIRTIO version 1.0 */
+typedef struct virtq_desc {
+        ioport64_t addr;        /**< Buffer physical address */
+        ioport32_t len;         /**< Buffer length */
+        ioport16_t flags;       /**< Buffer flags */
+        ioport16_t next;        /**< Continuation descriptor */
+} virtq_desc_t;
+
+#define VIRTQ_AVAIL_F_NO_INTERRUPT      1
+
+/** Virtqueue Available Ring as per VIRTIO version 1.0 */
+typedef struct virtq_avail {
+        ioport16_t flags;
+        ioport16_t idx;
+        ioport16_t ring[];
+        /*
+         * We do not define the optional used_event member here in order to be
+         * able to define ring as a variable-length array.
+         */
+} virtq_avail_t;
+
+typedef struct virtq_used_elem {
+        ioport32_t id;
+        ioport32_t len;
+} virtq_used_elem_t;
+
+#define VIRTQ_USED_F_NO_NOTIFY  1
+
+/** Virtqueue Used Ring as per VIRTIO version 1.0 */
+typedef struct virtq_used {
+        ioport16_t flags;
+        ioport16_t idx;
+        virtq_used_elem_t ring[];
+        /*
+         * We do not define the optional avail_event member here in order to be
+         * able to define ring as a variable-length array.
+         */
+} virtq_used_t;
+
+/** VIRTIO-device specific data associated with the NIC framework nic_t */
 typedef struct {
         struct {