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/* SPDX-License-Identifier: Apache-2.0
* Copyright (c) 2023 Cisco Systems, Inc.
*/
#include <vnet/vnet.h>
#include <vnet/dev/dev.h>
#include <vnet/dev/counters.h>
#include <vppinfra/ring.h>
#include <dev_iavf/iavf.h>
#include <dev_iavf/virtchnl.h>
#include <dev_iavf/virtchnl_funcs.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/plugin/plugin.h>
#include <vpp/app/version.h>
VLIB_REGISTER_LOG_CLASS (iavf_log, static) = {
.class_name = "iavf",
.subclass_name = "queue",
};
vnet_dev_rv_t
iavf_rx_queue_alloc (vlib_main_t *vm, vnet_dev_rx_queue_t *rxq)
{
vnet_dev_port_t *port = rxq->port;
vnet_dev_t *dev = port->dev;
iavf_device_t *ad = vnet_dev_get_data (dev);
iavf_rxq_t *arq = vnet_dev_get_rx_queue_data (rxq);
vnet_dev_rv_t rv;
arq->buffer_indices = clib_mem_alloc_aligned (
rxq->size * sizeof (arq->buffer_indices[0]), CLIB_CACHE_LINE_BYTES);
if ((rv =
vnet_dev_dma_mem_alloc (vm, dev, sizeof (iavf_rx_desc_t) * rxq->size,
0, (void **) &arq->descs)))
return rv;
arq->qrx_tail = ad->bar0 + IAVF_QRX_TAIL (rxq->queue_id);
log_debug (dev, "queue %u alocated", rxq->queue_id);
return rv;
}
void
iavf_rx_queue_free (vlib_main_t *vm, vnet_dev_rx_queue_t *rxq)
{
vnet_dev_t *dev = rxq->port->dev;
iavf_rxq_t *aq = vnet_dev_get_rx_queue_data (rxq);
log_debug (dev, "queue %u", rxq->queue_id);
vnet_dev_dma_mem_free (vm, dev, aq->descs);
foreach_pointer (p, aq->buffer_indices)
if (p)
clib_mem_free (p);
}
vnet_dev_rv_t
iavf_tx_queue_alloc (vlib_main_t *vm, vnet_dev_tx_queue_t *txq)
{
vnet_dev_t *dev = txq->port->dev;
iavf_device_t *ad = vnet_dev_get_data (dev);
iavf_txq_t *atq = vnet_dev_get_tx_queue_data (txq);
vnet_dev_rv_t rv;
if ((rv =
vnet_dev_dma_mem_alloc (vm, dev, sizeof (iavf_tx_desc_t) * txq->size,
0, (void **) &atq->descs)))
return rv;
clib_ring_new_aligned (atq->rs_slots, 32, CLIB_CACHE_LINE_BYTES);
atq->buffer_indices = clib_mem_alloc_aligned (
txq->size * sizeof (atq->buffer_indices[0]), CLIB_CACHE_LINE_BYTES);
atq->tmp_descs = clib_mem_alloc_aligned (
sizeof (atq->tmp_descs[0]) * txq->size, CLIB_CACHE_LINE_BYTES);
atq->tmp_bufs = clib_mem_alloc_aligned (
sizeof (atq->tmp_bufs[0]) * txq->size, CLIB_CACHE_LINE_BYTES);
atq->qtx_tail = ad->bar0 + IAVF_QTX_TAIL (txq->queue_id);
log_debug (dev, "queue %u alocated", txq->queue_id);
return VNET_DEV_OK;
}
void
iavf_tx_queue_free (vlib_main_t *vm, vnet_dev_tx_queue_t *txq)
{
vnet_dev_t *dev = txq->port->dev;
iavf_txq_t *atq = vnet_dev_get_tx_queue_data (txq);
iavf_txq_t *aq = vnet_dev_get_tx_queue_data (txq);
log_debug (dev, "queue %u", txq->queue_id);
vnet_dev_dma_mem_free (vm, dev, aq->descs);
clib_ring_free (atq->rs_slots);
foreach_pointer (p, aq->tmp_descs, aq->tmp_bufs, aq->buffer_indices)
if (p)
clib_mem_free (p);
}
vnet_dev_rv_t
iavf_rx_queue_start (vlib_main_t *vm, vnet_dev_rx_queue_t *rxq)
{
vnet_dev_t *dev = rxq->port->dev;
iavf_rxq_t *arq = vnet_dev_get_rx_queue_data (rxq);
iavf_rx_desc_t *d = arq->descs;
u32 n_enq, *bi = arq->buffer_indices;
u8 bpi = vnet_dev_get_rx_queue_buffer_pool_index (rxq);
n_enq = vlib_buffer_alloc_from_pool (vm, bi, rxq->size - 8, bpi);
if (n_enq < 8)
{
if (n_enq)
vlib_buffer_free (vm, bi, n_enq);
return VNET_DEV_ERR_BUFFER_ALLOC_FAIL;
}
for (u32 i = 0; i < n_enq; i++)
{
vlib_buffer_t *b = vlib_get_buffer (vm, bi[i]);
u64 dma_addr = vnet_dev_get_dma_addr (vm, dev, b->data);
d[i] = (iavf_rx_desc_t){ .addr = dma_addr };
}
arq->n_enqueued = n_enq;
arq->next = 0;
__atomic_store_n (arq->qrx_tail, n_enq, __ATOMIC_RELEASE);
return VNET_DEV_OK;
}
void
iavf_rx_queue_stop (vlib_main_t *vm, vnet_dev_rx_queue_t *rxq)
{
iavf_rxq_t *arq = vnet_dev_get_rx_queue_data (rxq);
__atomic_store_n (arq->qrx_tail, 0, __ATOMIC_RELAXED);
if (arq->n_enqueued)
{
vlib_buffer_free_from_ring_no_next (vm, arq->buffer_indices, arq->next,
rxq->size, arq->n_enqueued);
log_debug (rxq->port->dev, "%u buffers freed from rx queue %u",
arq->n_enqueued, rxq->queue_id);
}
arq->n_enqueued = arq->next = 0;
}
vnet_dev_rv_t
iavf_tx_queue_start (vlib_main_t *vm, vnet_dev_tx_queue_t *txq)
{
iavf_txq_t *atq = vnet_dev_get_tx_queue_data (txq);
atq->next = 0;
atq->n_enqueued = 0;
clib_ring_reset (atq->rs_slots);
__atomic_store_n (atq->qtx_tail, 0, __ATOMIC_RELAXED);
return VNET_DEV_OK;
}
void
iavf_tx_queue_stop (vlib_main_t *vm, vnet_dev_tx_queue_t *txq)
{
iavf_txq_t *atq = vnet_dev_get_tx_queue_data (txq);
log_debug (txq->port->dev, "queue %u", txq->queue_id);
__atomic_store_n (atq->qtx_tail, 0, __ATOMIC_RELAXED);
if (atq->n_enqueued)
{
vlib_buffer_free_from_ring_no_next (vm, atq->buffer_indices,
atq->next - atq->n_enqueued,
txq->size, atq->n_enqueued);
log_debug (txq->port->dev, "%u buffers freed from tx queue %u",
atq->n_enqueued, txq->queue_id);
}
atq->n_enqueued = atq->next = 0;
}
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