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sys/dev/iavf/iavf_vc_iflib.c

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/* SPDX-License-Identifier: BSD-3-Clause */
/* Copyright (c) 2021, Intel Corporation
* 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.
*
* 3. Neither the name of the Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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 OWNER 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.
*/
/*$FreeBSD$*/
/**
* @file iavf_vc_iflib.c
* @brief iflib-specific Virtchnl interface functions
*
* Contains functions implementing the virtchnl interface for communicating
* with the PF driver. This file contains definitions specific to the iflib
* driver implementation.
*/
#include "iavf_iflib.h"
#include "iavf_vc_common.h"
/**
* iavf_configure_queues - Configure queues
* @sc: device softc
*
* Request that the PF set up our queues.
*
* @returns zero on success, or an error code on failure.
*/
int
iavf_configure_queues(struct iavf_sc *sc)
{
device_t dev = sc->dev;
struct iavf_vsi *vsi = &sc->vsi;
if_softc_ctx_t scctx = iflib_get_softc_ctx(vsi->ctx);
struct iavf_tx_queue *tx_que = vsi->tx_queues;
struct iavf_rx_queue *rx_que = vsi->rx_queues;
struct tx_ring *txr;
struct rx_ring *rxr;
int len, pairs;
struct virtchnl_vsi_queue_config_info *vqci;
struct virtchnl_queue_pair_info *vqpi;
/* XXX: Linux PF driver wants matching ids in each tx/rx struct, so both TX/RX
* queues of a pair need to be configured */
pairs = max(vsi->num_tx_queues, vsi->num_rx_queues);
len = sizeof(struct virtchnl_vsi_queue_config_info) +
(sizeof(struct virtchnl_queue_pair_info) * pairs);
vqci = malloc(len, M_IAVF, M_NOWAIT | M_ZERO);
if (!vqci) {
device_printf(dev, "%s: unable to allocate memory\n", __func__);
return (ENOMEM);
}
vqci->vsi_id = sc->vsi_res->vsi_id;
vqci->num_queue_pairs = pairs;
vqpi = vqci->qpair;
/* Size check is not needed here - HW max is 16 queue pairs, and we
* can fit info for 31 of them into the AQ buffer before it overflows.
*/
// TODO: the above is wrong now; X722 VFs can have 256 queues
for (int i = 0; i < pairs; i++, tx_que++, rx_que++, vqpi++) {
txr = &tx_que->txr;
rxr = &rx_que->rxr;
vqpi->txq.vsi_id = vqci->vsi_id;
vqpi->txq.queue_id = i;
vqpi->txq.ring_len = scctx->isc_ntxd[0];
vqpi->txq.dma_ring_addr = txr->tx_paddr;
/* Enable Head writeback */
if (!vsi->enable_head_writeback) {
vqpi->txq.headwb_enabled = 0;
vqpi->txq.dma_headwb_addr = 0;
} else {
vqpi->txq.headwb_enabled = 1;
vqpi->txq.dma_headwb_addr = txr->tx_paddr +
sizeof(struct iavf_tx_desc) * scctx->isc_ntxd[0];
}
vqpi->rxq.vsi_id = vqci->vsi_id;
vqpi->rxq.queue_id = i;
vqpi->rxq.ring_len = scctx->isc_nrxd[0];
vqpi->rxq.dma_ring_addr = rxr->rx_paddr;
vqpi->rxq.max_pkt_size = scctx->isc_max_frame_size;
vqpi->rxq.databuffer_size = rxr->mbuf_sz;
vqpi->rxq.splithdr_enabled = 0;
}
iavf_send_pf_msg(sc, VIRTCHNL_OP_CONFIG_VSI_QUEUES,
(u8 *)vqci, len);
free(vqci, M_IAVF);
return (0);
}
/**
* iavf_map_queues - Map queues to interrupt vectors
* @sc: device softc
*
* Request that the PF map queues to interrupt vectors. Misc causes, including
* admin queue, are always mapped to vector 0.
*
* @returns zero on success, or an error code on failure.
*/
int
iavf_map_queues(struct iavf_sc *sc)
{
struct virtchnl_irq_map_info *vm;
int i, q, len;
struct iavf_vsi *vsi = &sc->vsi;
struct iavf_rx_queue *rx_que = vsi->rx_queues;
if_softc_ctx_t scctx = vsi->shared;
device_t dev = sc->dev;
// XXX: What happens if we only get 1 MSI-X vector?
MPASS(scctx->isc_vectors > 1);
/* How many queue vectors, adminq uses one */
// XXX: How do we know how many interrupt vectors we have?
q = scctx->isc_vectors - 1;
len = sizeof(struct virtchnl_irq_map_info) +
(scctx->isc_vectors * sizeof(struct virtchnl_vector_map));
vm = malloc(len, M_IAVF, M_NOWAIT);
if (!vm) {
device_printf(dev, "%s: unable to allocate memory\n", __func__);
return (ENOMEM);
}
vm->num_vectors = scctx->isc_vectors;
/* Queue vectors first */
for (i = 0; i < q; i++, rx_que++) {
vm->vecmap[i].vsi_id = sc->vsi_res->vsi_id;
vm->vecmap[i].vector_id = i + 1; /* first is adminq */
// TODO: Re-examine this
vm->vecmap[i].txq_map = (1 << rx_que->rxr.me);
vm->vecmap[i].rxq_map = (1 << rx_que->rxr.me);
vm->vecmap[i].rxitr_idx = 0;
vm->vecmap[i].txitr_idx = 1;
}
/* Misc vector last - this is only for AdminQ messages */
vm->vecmap[i].vsi_id = sc->vsi_res->vsi_id;
vm->vecmap[i].vector_id = 0;
vm->vecmap[i].txq_map = 0;
vm->vecmap[i].rxq_map = 0;
vm->vecmap[i].rxitr_idx = 0;
vm->vecmap[i].txitr_idx = 0;
iavf_send_pf_msg(sc, VIRTCHNL_OP_CONFIG_IRQ_MAP,
(u8 *)vm, len);
free(vm, M_IAVF);
return (0);
}