vmd(8) - virtual machine daemon.

There is still a lot to be done, and fixed, in these userland components
but I have received enough "it works, commit it" emails that it's time
to finish those things in tree.

discussed with many, tested by many.

1 files changed, 116 insertions, 0 deletions

diff --git a/usr.sbin/vmd/virtio.h b/usr.sbin/vmd/virtio.h
new file mode 100644
index 00000000000..d20ae7b2ea7
--- /dev/null
+++ b/usr.sbin/vmd/virtio.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <dev/pci/virtioreg.h>
+
+#define VIRTQUEUE_ALIGN(n)      (((n)+(VIRTIO_PAGE_SIZE-1))&    \
+	~(VIRTIO_PAGE_SIZE-1))
+
+/* Queue sizes must be power of two */
+#define VIORND_QUEUE_SIZE	64
+#define VIORND_QUEUE_MASK	(VIORND_QUEUE_SIZE - 1)
+
+#define VIOBLK_QUEUE_SIZE	64
+#define VIOBLK_QUEUE_MASK	(VIOBLK_QUEUE_SIZE - 1)
+
+#define VIONET_QUEUE_SIZE	64
+#define VIONET_QUEUE_MASK	(VIONET_QUEUE_SIZE - 1)
+
+/* All the devices we support have either 1 or 2 queues */
+#define VIRTIO_MAX_QUEUES	2
+
+struct virtio_io_cfg {
+	uint32_t device_feature;
+	uint32_t guest_feature;
+	uint32_t queue_address;
+	uint16_t queue_size;
+	uint16_t queue_select;
+	uint16_t queue_notify;
+	uint8_t device_status;
+	uint8_t isr_status;
+};
+
+struct virtio_vq_info {
+	uint32_t qa;
+	uint32_t qs;
+	uint32_t vq_availoffset;
+	uint32_t vq_usedoffset;
+	uint16_t last_avail;
+};
+
+struct viornd_dev {
+	struct virtio_io_cfg cfg;
+
+	struct virtio_vq_info vq[VIRTIO_MAX_QUEUES];
+};
+
+struct vioblk_dev {
+	struct virtio_io_cfg cfg;
+
+	struct virtio_vq_info vq[VIRTIO_MAX_QUEUES];
+
+	int fd;
+	uint64_t sz;
+};
+
+struct vionet_dev {
+	struct virtio_io_cfg cfg;
+
+	struct virtio_vq_info vq[VIRTIO_MAX_QUEUES];
+	
+	int fd, rx_added;
+	uint8_t mac[6];
+};
+
+struct virtio_net_hdr {
+	uint8_t flags;
+	uint8_t gso_type;
+	uint16_t hdr_len;
+	uint16_t gso_size;
+	uint16_t csum_start;
+	uint16_t csum_offset;
+
+	/*
+	 * num_buffers is only used if VIRTIO_NET_F_MRG_RXBUF is negotiated.
+	 * vmd(8) doesn't negotiate that, but the field is listed here
+	 * for completeness sake.
+	 */
+/*	uint16_t num_buffers; */
+};
+
+
+void virtio_init(struct vm_create_params *, int *, int *);
+uint32_t vring_size(uint32_t);
+
+int virtio_rnd_io(int, uint16_t, uint32_t *, uint8_t *, void *);
+void viornd_update_qs(void);
+void viornd_update_qa(void);
+int viornd_notifyq(void);
+
+int virtio_blk_io(int, uint16_t, uint32_t *, uint8_t *, void *);
+void vioblk_update_qs(struct vioblk_dev *);
+void vioblk_update_qa(struct vioblk_dev *);
+int vioblk_notifyq(struct vioblk_dev *);
+
+int virtio_net_io(int, uint16_t, uint32_t *, uint8_t *, void *);
+void vionet_update_qs(struct vionet_dev *);
+void vionet_update_qa(struct vionet_dev *);
+int vionet_notifyq(struct vionet_dev *);
+void vionet_notify_rx(struct vionet_dev *);
+int vionet_process_rx(void);
+int vionet_enq_rx(struct vionet_dev *, char *, ssize_t, int *);
+
+const char *vioblk_cmd_name(uint32_t);