Imported Upstream version 16.04

[deb_dpdk.git] / drivers / net / enic / base / vnic_rq.h

diff --git a/drivers/net/enic/base/vnic_rq.h b/drivers/net/enic/base/vnic_rq.h
new file mode 100644 (file)
index 0000000..e083ccc
--- /dev/null
+++ b/drivers/net/enic/base/vnic_rq.h
@@ -0,0 +1,152 @@
+/*
+ * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * Copyright (c) 2014, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _VNIC_RQ_H_
+#define _VNIC_RQ_H_
+
+
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+/* Receive queue control */
+struct vnic_rq_ctrl {
+       u64 ring_base;                  /* 0x00 */
+       u32 ring_size;                  /* 0x08 */
+       u32 pad0;
+       u32 posted_index;               /* 0x10 */
+       u32 pad1;
+       u32 cq_index;                   /* 0x18 */
+       u32 pad2;
+       u32 enable;                     /* 0x20 */
+       u32 pad3;
+       u32 running;                    /* 0x28 */
+       u32 pad4;
+       u32 fetch_index;                /* 0x30 */
+       u32 pad5;
+       u32 error_interrupt_enable;     /* 0x38 */
+       u32 pad6;
+       u32 error_interrupt_offset;     /* 0x40 */
+       u32 pad7;
+       u32 error_status;               /* 0x48 */
+       u32 pad8;
+       u32 dropped_packet_count;       /* 0x50 */
+       u32 pad9;
+       u32 dropped_packet_count_rc;    /* 0x58 */
+       u32 pad10;
+};
+
+struct vnic_rq {
+       unsigned int index;
+       unsigned int posted_index;
+       struct vnic_dev *vdev;
+       struct vnic_rq_ctrl __iomem *ctrl;      /* memory-mapped */
+       struct vnic_dev_ring ring;
+       struct rte_mbuf **mbuf_ring;            /* array of allocated mbufs */
+       unsigned int mbuf_next_idx;             /* next mb to consume */
+       void *os_buf_head;
+       unsigned int pkts_outstanding;
+       uint16_t rx_nb_hold;
+       uint16_t rx_free_thresh;
+       unsigned int socket_id;
+       struct rte_mempool *mp;
+       uint16_t rxst_idx;
+       uint32_t tot_pkts;
+};
+
+static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
+{
+       /* how many does SW own? */
+       return rq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
+{
+       /* how many does HW own? */
+       return rq->ring.desc_count - rq->ring.desc_avail - 1;
+}
+
+
+
+enum desc_return_options {
+       VNIC_RQ_RETURN_DESC,
+       VNIC_RQ_DEFER_RETURN_DESC,
+};
+
+static inline int vnic_rq_fill(struct vnic_rq *rq,
+       int (*buf_fill)(struct vnic_rq *rq))
+{
+       int err;
+
+       while (vnic_rq_desc_avail(rq) > 0) {
+
+               err = (*buf_fill)(rq);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
+static inline int vnic_rq_fill_count(struct vnic_rq *rq,
+       int (*buf_fill)(struct vnic_rq *rq), unsigned int count)
+{
+       int err;
+
+       while ((vnic_rq_desc_avail(rq) > 0) && (count--)) {
+
+               err = (*buf_fill)(rq);
+               if (err)
+                       return err;
+       }
+
+       return 0;
+}
+
+void vnic_rq_free(struct vnic_rq *rq);
+int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size);
+void vnic_rq_init_start(struct vnic_rq *rq, unsigned int cq_index,
+       unsigned int fetch_index, unsigned int posted_index,
+       unsigned int error_interrupt_enable,
+       unsigned int error_interrupt_offset);
+void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
+       unsigned int error_interrupt_enable,
+       unsigned int error_interrupt_offset);
+void vnic_rq_error_out(struct vnic_rq *rq, unsigned int error);
+unsigned int vnic_rq_error_status(struct vnic_rq *rq);
+void vnic_rq_enable(struct vnic_rq *rq);
+int vnic_rq_disable(struct vnic_rq *rq);
+void vnic_rq_clean(struct vnic_rq *rq,
+       void (*buf_clean)(struct rte_mbuf **buf));
+#endif /* _VNIC_RQ_H_ */