Merge "These changes are the raw update to qemu-2.6."

1 files changed, 365 insertions, 0 deletions

diff --git a/qemu/roms/ipxe/src/drivers/net/netvsc.h b/qemu/roms/ipxe/src/drivers/net/netvsc.h
new file mode 100644
index 000000000..39eeb891c
--- /dev/null
+++ b/qemu/roms/ipxe/src/drivers/net/netvsc.h
@@ -0,0 +1,365 @@
+#ifndef _NETVSC_H
+#define _NETVSC_H
+
+/** @file
+ *
+ * Hyper-V network virtual service client
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+/** Maximum supported NetVSC message length */
+#define NETVSC_MTU 512
+
+/** Maximum time to wait for a transaction to complete
+ *
+ * This is a policy decision.
+ */
+#define NETVSC_MAX_WAIT_MS 1000
+
+/** Number of transmit ring entries
+ *
+ * Must be a power of two.  This is a policy decision.  This value
+ * must be sufficiently small to guarantee that we never run out of
+ * space in the VMBus outbound ring buffer.
+ */
+#define NETVSC_TX_NUM_DESC 32
+
+/** RX data buffer page set ID
+ *
+ * This is a policy decision.
+ */
+#define NETVSC_RX_BUF_PAGESET 0xbead
+
+/** RX data buffer length
+ *
+ * This is a policy decision.
+ */
+#define NETVSC_RX_BUF_LEN ( 16 * PAGE_SIZE )
+
+/** Base transaction ID
+ *
+ * This is a policy decision.
+ */
+#define NETVSC_BASE_XID 0x18ae0000UL
+
+/** Relative transaction IDs */
+enum netvsc_xrid {
+	/** Transmit descriptors (one per transmit buffer ID) */
+	NETVSC_TX_BASE_XRID = 0,
+	/** Initialisation */
+	NETVSC_INIT_XRID = ( NETVSC_TX_BASE_XRID + NETVSC_TX_NUM_DESC ),
+	/** NDIS version */
+	NETVSC_NDIS_VERSION_XRID,
+	/** Establish receive buffer */
+	NETVSC_RX_ESTABLISH_XRID,
+	/** Revoke receive buffer */
+	NETVSC_RX_REVOKE_XRID,
+};
+
+/** NetVSC status codes */
+enum netvsc_status {
+	NETVSC_NONE = 0,
+	NETVSC_OK = 1,
+	NETVSC_FAIL = 2,
+	NETVSC_TOO_NEW = 3,
+	NETVSC_TOO_OLD = 4,
+	NETVSC_BAD_PACKET = 5,
+	NETVSC_BUSY = 6,
+	NETVSC_UNSUPPORTED = 7,
+};
+
+/** NetVSC message header */
+struct netvsc_header {
+	/** Type */
+	uint32_t type;
+} __attribute__ (( packed ));
+
+/** NetVSC initialisation message */
+#define NETVSC_INIT_MSG 1
+
+/** NetVSC initialisation message */
+struct netvsc_init_message {
+	/** Message header */
+	struct netvsc_header header;
+	/** Minimum supported protocol version */
+	uint32_t min;
+	/** Maximum supported protocol version */
+	uint32_t max;
+	/** Reserved */
+	uint8_t reserved[20];
+} __attribute__ (( packed ));
+
+/** Oldest known NetVSC protocol version */
+#define NETVSC_VERSION_1 2 /* sic */
+
+/** NetVSC initialisation completion */
+#define NETVSC_INIT_CMPLT 2
+
+/** NetVSC initialisation completion */
+struct netvsc_init_completion {
+	/** Message header */
+	struct netvsc_header header;
+	/** Protocol version */
+	uint32_t version;
+	/** Maximum memory descriptor list length */
+	uint32_t max_mdl_len;
+	/** Status */
+	uint32_t status;
+	/** Reserved */
+	uint8_t reserved[16];
+} __attribute__ (( packed ));
+
+/** NetVSC NDIS version message */
+#define NETVSC_NDIS_VERSION_MSG 100
+
+/** NetVSC NDIS version message */
+struct netvsc_ndis_version_message {
+	/** Message header */
+	struct netvsc_header header;
+	/** Major version */
+	uint32_t major;
+	/** Minor version */
+	uint32_t minor;
+	/** Reserved */
+	uint8_t reserved[20];
+} __attribute__ (( packed ));
+
+/** NetVSC NDIS major version */
+#define NETVSC_NDIS_MAJOR 6
+
+/** NetVSC NDIS minor version */
+#define NETVSC_NDIS_MINOR 1
+
+/** NetVSC establish receive data buffer message */
+#define NETVSC_RX_ESTABLISH_MSG 101
+
+/** NetVSC establish receive data buffer completion */
+#define NETVSC_RX_ESTABLISH_CMPLT 102
+
+/** NetVSC revoke receive data buffer message */
+#define NETVSC_RX_REVOKE_MSG 103
+
+/** NetVSC establish transmit data buffer message */
+#define NETVSC_TX_ESTABLISH_MSG 104
+
+/** NetVSC establish transmit data buffer completion */
+#define NETVSC_TX_ESTABLISH_CMPLT 105
+
+/** NetVSC revoke transmit data buffer message */
+#define NETVSC_TX_REVOKE_MSG 106
+
+/** NetVSC establish data buffer message */
+struct netvsc_establish_buffer_message {
+	/** Message header */
+	struct netvsc_header header;
+	/** GPADL ID */
+	uint32_t gpadl;
+	/** Page set ID */
+	uint16_t pageset;
+	/** Reserved */
+	uint8_t reserved[22];
+} __attribute__ (( packed ));
+
+/** NetVSC receive data buffer section */
+struct netvsc_rx_buffer_section {
+	/** Starting offset */
+	uint32_t start;
+	/** Subsection length */
+	uint32_t len;
+	/** Number of subsections */
+	uint32_t count;
+	/** Ending offset */
+	uint32_t end;
+} __attribute__ (( packed ));
+
+/** NetVSC establish receive data buffer completion */
+struct netvsc_rx_establish_buffer_completion {
+	/** Message header */
+	struct netvsc_header header;
+	/** Status */
+	uint32_t status;
+	/** Number of sections (must be 1) */
+	uint32_t count;
+	/** Section descriptors */
+	struct netvsc_rx_buffer_section section[1];
+} __attribute__ (( packed ));
+
+/** NetVSC establish transmit data buffer completion */
+struct netvsc_tx_establish_buffer_completion {
+	/** Message header */
+	struct netvsc_header header;
+	/** Status */
+	uint32_t status;
+	/** Section length */
+	uint32_t len;
+} __attribute__ (( packed ));
+
+/** NetVSC revoke data buffer message */
+struct netvsc_revoke_buffer_message {
+	/** Message header */
+	struct netvsc_header header;
+	/** Page set ID */
+	uint16_t pageset;
+	/** Reserved */
+	uint8_t reserved[26];
+} __attribute__ (( packed ));
+
+/** NetVSC RNDIS message */
+#define NETVSC_RNDIS_MSG 107
+
+/** NetVSC RNDIS message */
+struct netvsc_rndis_message {
+	/** Message header */
+	struct netvsc_header header;
+	/** RNDIS channel */
+	uint32_t channel;
+	/** Buffer index (or NETVSC_RNDIS_NO_BUFFER) */
+	uint32_t buffer;
+	/** Buffer length */
+	uint32_t len;
+	/** Reserved */
+	uint8_t reserved[16];
+} __attribute__ (( packed ));
+
+/** RNDIS data channel (for RNDIS_PACKET_MSG only) */
+#define NETVSC_RNDIS_DATA 0
+
+/** RNDIS control channel (for all other RNDIS messages) */
+#define NETVSC_RNDIS_CONTROL 1
+
+/** "No buffer used" index */
+#define NETVSC_RNDIS_NO_BUFFER 0xffffffffUL
+
+/** A NetVSC descriptor ring */
+struct netvsc_ring {
+	/** Number of descriptors */
+	unsigned int count;
+	/** I/O buffers, indexed by buffer ID */
+	struct io_buffer **iobufs;
+	/** Buffer ID ring */
+	uint8_t *ids;
+	/** Buffer ID producer counter */
+	unsigned int id_prod;
+	/** Buffer ID consumer counter */
+	unsigned int id_cons;
+};
+
+/**
+ * Initialise descriptor ring
+ *
+ * @v ring		Descriptor ring
+ * @v count		Maximum number of used descriptors
+ * @v iobufs		I/O buffers
+ * @v ids		Buffer IDs
+ */
+static inline __attribute__ (( always_inline )) void
+netvsc_init_ring ( struct netvsc_ring *ring, unsigned int count,
+		   struct io_buffer **iobufs, uint8_t *ids ) {
+
+	ring->count = count;
+	ring->iobufs = iobufs;
+	ring->ids = ids;
+}
+
+/**
+ * Check whether or not descriptor ring is full
+ *
+ * @v ring		Descriptor ring
+ * @v is_full		Ring is full
+ */
+static inline __attribute__ (( always_inline )) int
+netvsc_ring_is_full ( struct netvsc_ring *ring ) {
+	unsigned int fill_level;
+
+	fill_level = ( ring->id_prod - ring->id_cons );
+	assert ( fill_level <= ring->count );
+	return ( fill_level >= ring->count );
+}
+
+/**
+ * Check whether or not descriptor ring is empty
+ *
+ * @v ring		Descriptor ring
+ * @v is_empty		Ring is empty
+ */
+static inline __attribute__ (( always_inline )) int
+netvsc_ring_is_empty ( struct netvsc_ring *ring ) {
+
+	return ( ring->id_prod == ring->id_cons );
+}
+
+/** A NetVSC data buffer */
+struct netvsc_buffer {
+	/** Transfer page set */
+	struct vmbus_xfer_pages pages;
+	/** Establish data buffer message type */
+	uint8_t establish_type;
+	/** Establish data buffer relative transaction ID */
+	uint8_t establish_xrid;
+	/** Revoke data buffer message type */
+	uint8_t revoke_type;
+	/** Revoke data buffer relative transaction ID */
+	uint8_t revoke_xrid;
+	/** Buffer length */
+	size_t len;
+	/** Buffer */
+	userptr_t data;
+	/** GPADL ID */
+	unsigned int gpadl;
+};
+
+/**
+ * Initialise data buffer
+ *
+ * @v buffer		Data buffer
+ * @v pageset		Page set ID
+ * @v op		Page set operations
+ * @v establish_type	Establish data buffer message type
+ * @v establish_xrid	Establish data buffer relative transaction ID
+ * @v revoke_type	Revoke data buffer message type
+ * @v revoke_type	Revoke data buffer relative transaction ID
+ * @v len		Required length
+ */
+static inline __attribute__ (( always_inline )) void
+netvsc_init_buffer ( struct netvsc_buffer *buffer, uint16_t pageset,
+		     struct vmbus_xfer_pages_operations *op,
+		     uint8_t establish_type, uint8_t establish_xrid,
+		     uint8_t revoke_type, uint8_t revoke_xrid, size_t len ) {
+
+	buffer->pages.pageset = cpu_to_le16 ( pageset );
+	buffer->pages.op = op;
+	buffer->establish_type = establish_type;
+	buffer->establish_xrid = establish_xrid;
+	buffer->revoke_type = revoke_type;
+	buffer->revoke_xrid = revoke_xrid;
+	buffer->len = len;
+}
+
+/** A NetVSC device */
+struct netvsc_device {
+	/** VMBus device */
+	struct vmbus_device *vmdev;
+	/** RNDIS device */
+	struct rndis_device *rndis;
+	/** Name */
+	const char *name;
+
+	/** Transmit ring */
+	struct netvsc_ring tx;
+	/** Transmit buffer IDs */
+	uint8_t tx_ids[NETVSC_TX_NUM_DESC];
+	/** Transmit I/O buffers */
+	struct io_buffer *tx_iobufs[NETVSC_TX_NUM_DESC];
+
+	/** Receive buffer */
+	struct netvsc_buffer rx;
+
+	/** Relative transaction ID for current blocking transaction */
+	unsigned int wait_xrid;
+	/** Return status code for current blocking transaction */
+	int wait_rc;
+};
+
+#endif /* _NETVSC_H */