[intelxl] Add driver for Intel 40 Gigabit Ethernet NIC virtual functions

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/intelxlvf.h

@@ -0,0 +1,86 @@
+#ifndef _INTELXLVF_H
+#define _INTELXLVF_H
+
+/** @file
+ *
+ * Intel 40 Gigabit Ethernet virtual function network card driver
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include "intelxl.h"
+
+/** BAR size */
+#define INTELXLVF_BAR_SIZE 0x10000
+
+/** Transmit Queue Tail Register */
+#define INTELXLVF_QTX_TAIL 0x00000
+
+/** Receive Queue Tail Register */
+#define INTELXLVF_QRX_TAIL 0x02000
+
+/** VF Interrupt Zero Dynamic Control Register */
+#define INTELXLVF_VFINT_DYN_CTL0 0x5c00
+
+/** VF Admin Queue register block */
+#define INTELXLVF_ADMIN 0x6000
+
+/** Admin Command Queue Base Address Low Register (offset) */
+#define INTELXLVF_ADMIN_CMD_BAL 0x1c00
+
+/** Admin Command Queue Base Address High Register (offset) */
+#define INTELXLVF_ADMIN_CMD_BAH 0x1800
+
+/** Admin Command Queue Length Register (offset) */
+#define INTELXLVF_ADMIN_CMD_LEN 0x0800
+
+/** Admin Command Queue Head Register (offset) */
+#define INTELXLVF_ADMIN_CMD_HEAD 0x0400
+
+/** Admin Command Queue Tail Register (offset) */
+#define INTELXLVF_ADMIN_CMD_TAIL 0x2400
+
+/** Admin Event Queue Base Address Low Register (offset) */
+#define INTELXLVF_ADMIN_EVT_BAL 0x0c00
+
+/** Admin Event Queue Base Address High Register (offset) */
+#define INTELXLVF_ADMIN_EVT_BAH 0x0000
+
+/** Admin Event Queue Length Register (offset) */
+#define INTELXLVF_ADMIN_EVT_LEN 0x2000
+
+/** Admin Event Queue Head Register (offset) */
+#define INTELXLVF_ADMIN_EVT_HEAD 0x1400
+
+/** Admin Event Queue Tail Register (offset) */
+#define INTELXLVF_ADMIN_EVT_TAIL 0x1000
+
+/** Maximum time to wait for a VF admin request to complete */
+#define INTELXLVF_ADMIN_MAX_WAIT_MS 2000
+
+/** VF Reset Status Register */
+#define INTELXLVF_VFGEN_RSTAT 0x8800
+#define INTELXLVF_VFGEN_RSTAT_VFR_STATE(x) ( (x) & 0x3 )
+#define INTELXLVF_VFGEN_RSTAT_VFR_STATE_ACTIVE 0x2
+
+/** Maximum time to wait for reset to complete */
+#define INTELXLVF_RESET_MAX_WAIT_MS 1000
+
+/**
+ * Initialise descriptor ring
+ *
+ * @v ring		Descriptor ring
+ * @v count		Number of descriptors
+ * @v len		Length of a single descriptor
+ * @v tail		Tail register offset
+ */
+static inline __attribute__ (( always_inline)) void
+intelxlvf_init_ring ( struct intelxl_ring *ring, unsigned int count,
+		      size_t len, unsigned int tail ) {
+
+	ring->len = ( count * len );
+	ring->tail = tail;
+}
+
+#endif /* _INTELXLVF_H */