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Each channel gets its own DMA resources, cleanup and "bufferpool" tasks, and a separate cleanup taskqueue to isolate channels operation as much as possible to avoid various kernel panics under heavy network load. As a side-effect of this work, dpaa2_buf structure is simplified and all of the functions to re-seed those buffers are gathered now in dpaa2_buf.h and .c files; functions to work with channels are extracted into dpaa2_channel.h and .c files as well. Reported by: dch Reviewed by: bz Approved by: bz (mentor) MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D41296
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright © 2023 Dmitry Salychev
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _DPAA2_CHANNEL_H
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#define _DPAA2_CHANNEL_H
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/taskqueue.h>
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#include <sys/buf_ring.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include "dpaa2_types.h"
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#include "dpaa2_io.h"
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#include "dpaa2_ni.h"
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#define DPAA2_TX_BUFRING_SZ (4096u)
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/**
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* @brief QBMan channel to process ingress traffic.
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*
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* NOTE: Several WQs are organized into a single channel.
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*/
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struct dpaa2_channel {
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device_t ni_dev;
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device_t io_dev;
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device_t con_dev;
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uint16_t id;
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uint16_t flowid;
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uint64_t tx_frames;
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uint64_t tx_dropped;
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struct mtx dma_mtx;
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bus_dma_tag_t rx_dmat;
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bus_dma_tag_t tx_dmat;
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bus_dma_tag_t sgt_dmat;
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struct dpaa2_io_notif_ctx ctx; /* to configure CDANs */
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struct dpaa2_buf store; /* to keep VDQ responses */
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uint32_t store_sz; /* in frames */
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uint32_t store_idx; /* frame index */
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uint32_t recycled_n;
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struct dpaa2_buf *recycled[DPAA2_SWP_BUFS_PER_CMD];
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uint32_t rxq_n;
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struct dpaa2_ni_fq rx_queues[DPAA2_MAX_TCS];
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struct dpaa2_ni_fq txc_queue;
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struct taskqueue *cleanup_tq;
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struct task cleanup_task;
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struct task bp_task;
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struct mtx xmit_mtx;
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struct buf_ring *xmit_br;
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} __aligned(CACHE_LINE_SIZE);
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int dpaa2_chan_setup(device_t, device_t, device_t, device_t,
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struct dpaa2_channel **, uint32_t, task_fn_t);
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int dpaa2_chan_setup_fq(device_t, struct dpaa2_channel *,
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enum dpaa2_ni_queue_type);
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int dpaa2_chan_next_frame(struct dpaa2_channel *, struct dpaa2_dq **);
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#endif /* _DPAA2_CHANNEL_H */
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