+++ /dev/null
-/*
- * 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.
- *
- */
-#ident "$Id: vnic_rq.h 180262 2014-07-02 07:57:43Z gvaradar $"
-
-#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;
-};
-
-/* Break the vnic_rq_buf allocations into blocks of 32/64 entries */
-#define VNIC_RQ_BUF_MIN_BLK_ENTRIES 32
-#define VNIC_RQ_BUF_DFLT_BLK_ENTRIES 64
-#define VNIC_RQ_BUF_BLK_ENTRIES(entries) \
- ((unsigned int)((entries < VNIC_RQ_BUF_DFLT_BLK_ENTRIES) ? \
- VNIC_RQ_BUF_MIN_BLK_ENTRIES : VNIC_RQ_BUF_DFLT_BLK_ENTRIES))
-#define VNIC_RQ_BUF_BLK_SZ(entries) \
- (VNIC_RQ_BUF_BLK_ENTRIES(entries) * sizeof(struct vnic_rq_buf))
-#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
- DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES(entries))
-#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
-
-struct vnic_rq_buf {
- struct vnic_rq_buf *next;
- dma_addr_t dma_addr;
- void *os_buf;
- unsigned int os_buf_index;
- unsigned int len;
- unsigned int index;
- void *desc;
- uint64_t wr_id;
-};
-
-struct vnic_rq {
- unsigned int index;
- struct vnic_dev *vdev;
- struct vnic_rq_ctrl __iomem *ctrl; /* memory-mapped */
- struct vnic_dev_ring ring;
- struct vnic_rq_buf *bufs[VNIC_RQ_BUF_BLKS_MAX];
- struct vnic_rq_buf *to_use;
- struct vnic_rq_buf *to_clean;
- void *os_buf_head;
- unsigned int pkts_outstanding;
-
- unsigned int socket_id;
- struct rte_mempool *mp;
-};
-
-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;
-}
-
-static inline void *vnic_rq_next_desc(struct vnic_rq *rq)
-{
- return rq->to_use->desc;
-}
-
-static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq)
-{
- return rq->to_use->index;
-}
-
-static inline void vnic_rq_post(struct vnic_rq *rq,
- void *os_buf, unsigned int os_buf_index,
- dma_addr_t dma_addr, unsigned int len,
- uint64_t wrid)
-{
- struct vnic_rq_buf *buf = rq->to_use;
-
- buf->os_buf = os_buf;
- buf->os_buf_index = os_buf_index;
- buf->dma_addr = dma_addr;
- buf->len = len;
- buf->wr_id = wrid;
-
- buf = buf->next;
- rq->to_use = buf;
- rq->ring.desc_avail--;
-
- /* Move the posted_index every nth descriptor
- */
-
-#ifndef VNIC_RQ_RETURN_RATE
-#define VNIC_RQ_RETURN_RATE 0xf /* keep 2^n - 1 */
-#endif
-
- if ((buf->index & VNIC_RQ_RETURN_RATE) == 0) {
- /* Adding write memory barrier prevents compiler and/or CPU
- * reordering, thus avoiding descriptor posting before
- * descriptor is initialized. Otherwise, hardware can read
- * stale descriptor fields.
- */
- wmb();
- iowrite32(buf->index, &rq->ctrl->posted_index);
- }
-}
-
-static inline void vnic_rq_post_commit(struct vnic_rq *rq,
- void *os_buf, unsigned int os_buf_index,
- dma_addr_t dma_addr, unsigned int len)
-{
- struct vnic_rq_buf *buf = rq->to_use;
-
- buf->os_buf = os_buf;
- buf->os_buf_index = os_buf_index;
- buf->dma_addr = dma_addr;
- buf->len = len;
-
- buf = buf->next;
- rq->to_use = buf;
- rq->ring.desc_avail--;
-
- /* Move the posted_index every descriptor
- */
-
- /* Adding write memory barrier prevents compiler and/or CPU
- * reordering, thus avoiding descriptor posting before
- * descriptor is initialized. Otherwise, hardware can read
- * stale descriptor fields.
- */
- wmb();
- iowrite32(buf->index, &rq->ctrl->posted_index);
-}
-
-static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count)
-{
- rq->ring.desc_avail += count;
-}
-
-enum desc_return_options {
- VNIC_RQ_RETURN_DESC,
- VNIC_RQ_DEFER_RETURN_DESC,
-};
-
-static inline int vnic_rq_service(struct vnic_rq *rq,
- struct cq_desc *cq_desc, u16 completed_index,
- int desc_return, int (*buf_service)(struct vnic_rq *rq,
- struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
- int skipped, void *opaque), void *opaque)
-{
- struct vnic_rq_buf *buf;
- int skipped;
- int eop = 0;
-
- buf = rq->to_clean;
- while (1) {
-
- skipped = (buf->index != completed_index);
-
- if ((*buf_service)(rq, cq_desc, buf, skipped, opaque))
- eop++;
-
- if (desc_return == VNIC_RQ_RETURN_DESC)
- rq->ring.desc_avail++;
-
- rq->to_clean = buf->next;
-
- if (!skipped)
- break;
-
- buf = rq->to_clean;
- }
- return eop;
-}
-
-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 vnic_rq *rq, struct vnic_rq_buf *buf));
-int vnic_rq_mem_size(struct vnic_rq *rq, unsigned int desc_count,
- unsigned int desc_size);
-
-#endif /* _VNIC_RQ_H_ */
git.droids-corp.org / dpdk.git / blobdiff