Re: [dpdk-dev] [PATCH v7 3/5] net/enetfec: support queue configuration

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 11/3/2021 7:20 PM, Apeksha Gupta wrote:
> This patch adds Rx/Tx queue configuration setup operations.
> On packet reception the respective BD Ring status bit is set
> which is then used for packet processing.
> 
> Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>
> Signed-off-by: Apeksha Gupta <apeksha.gupta@nxp.com>
> ---
>   drivers/net/enetfec/enet_ethdev.c | 230 +++++++++++++++++++++++++++++-
>   drivers/net/enetfec/enet_ethdev.h |  73 ++++++++++
>   2 files changed, 302 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/enetfec/enet_ethdev.c b/drivers/net/enetfec/enet_ethdev.c
> index 410c395039..aa96093eb8 100644
> --- a/drivers/net/enetfec/enet_ethdev.c
> +++ b/drivers/net/enetfec/enet_ethdev.c
> @@ -45,6 +45,19 @@
>   
>   static uint32_t enetfec_e_cntl;
>   
> +/* Supported Rx offloads */
> +static uint64_t dev_rx_offloads_sup =
> +		DEV_RX_OFFLOAD_IPV4_CKSUM |
> +		DEV_RX_OFFLOAD_UDP_CKSUM |
> +		DEV_RX_OFFLOAD_TCP_CKSUM |
> +		DEV_RX_OFFLOAD_VLAN_STRIP |
> +		DEV_RX_OFFLOAD_CHECKSUM;
> +
> +static uint64_t dev_tx_offloads_sup =
> +		DEV_TX_OFFLOAD_IPV4_CKSUM |
> +		DEV_TX_OFFLOAD_UDP_CKSUM |
> +		DEV_TX_OFFLOAD_TCP_CKSUM;
> +

The comment in the previous version seems ignored, copying down:

The macro names are updated in ethdev, can you please update them?
like: DEV_RX_OFFLOAD_IPV4_CKSUM -> RTE_ETH_RX_OFFLOAD_IPV4_CKSUM


>   /*
>    * This function is called to start or restart the ENETFEC during a link
>    * change, transmit timeout, or to reconfigure the ENETFEC. The network
> @@ -204,10 +217,225 @@ enetfec_eth_stop(struct rte_eth_dev *dev)
>   	return 0;
>   }
>   
> +static int
> +enetfec_eth_info(__rte_unused struct rte_eth_dev *dev,
> +	struct rte_eth_dev_info *dev_info)
> +{
> +	dev_info->max_rx_queues = ENETFEC_MAX_Q;
> +	dev_info->max_tx_queues = ENETFEC_MAX_Q;
> +	dev_info->rx_offload_capa = dev_rx_offloads_sup;
> +	dev_info->tx_offload_capa = dev_tx_offloads_sup;
> +	return 0;
> +}
> +
> +static const unsigned short offset_des_active_rxq[] = {
> +	ENETFEC_RDAR_0, ENETFEC_RDAR_1, ENETFEC_RDAR_2
> +};
> +
> +static const unsigned short offset_des_active_txq[] = {
> +	ENETFEC_TDAR_0, ENETFEC_TDAR_1, ENETFEC_TDAR_2
> +};
> +
> +static int
> +enetfec_tx_queue_setup(struct rte_eth_dev *dev,
> +			uint16_t queue_idx,
> +			uint16_t nb_desc,
> +			unsigned int socket_id __rte_unused,
> +			const struct rte_eth_txconf *tx_conf)
> +{
> +	struct enetfec_private *fep = dev->data->dev_private;
> +	unsigned int i;
> +	struct bufdesc *bdp, *bd_base;
> +	struct enetfec_priv_tx_q *txq;
> +	unsigned int size;
> +	unsigned int dsize = fep->bufdesc_ex ? sizeof(struct bufdesc_ex) :
> +		sizeof(struct bufdesc);
> +	unsigned int dsize_log2 = fls64(dsize);
> +
> +	/* Tx deferred start is not supported */
> +	if (tx_conf->tx_deferred_start) {
> +		ENETFEC_PMD_ERR("%p:Tx deferred start not supported",
> +			(void *)dev);
> +		return -EINVAL;
> +	}
> +
> +	/* allocate transmit queue */
> +	txq = rte_zmalloc(NULL, sizeof(*txq), RTE_CACHE_LINE_SIZE);
> +	if (txq == NULL) {
> +		ENETFEC_PMD_ERR("transmit queue allocation failed");
> +		return -ENOMEM;
> +	}
> +
> +	if (nb_desc > MAX_TX_BD_RING_SIZE) {
> +		nb_desc = MAX_TX_BD_RING_SIZE;
> +		ENETFEC_PMD_WARN("modified the nb_desc to MAX_TX_BD_RING_SIZE\n");

Redundant '\n', as macro already adds one.
Can you please search and fix all usages?

> +	}
> +	txq->bd.ring_size = nb_desc;
> +	fep->total_tx_ring_size += txq->bd.ring_size;
> +	fep->tx_queues[queue_idx] = txq;
> +
> +	rte_write32(rte_cpu_to_le_32(fep->bd_addr_p_t[queue_idx]),
> +		(uint8_t *)fep->hw_baseaddr_v + ENETFEC_TD_START(queue_idx));
> +
> +	/* Set transmit descriptor base. */
> +	txq = fep->tx_queues[queue_idx];
> +	txq->fep = fep;
> +	size = dsize * txq->bd.ring_size;
> +	bd_base = (struct bufdesc *)fep->dma_baseaddr_t[queue_idx];
> +	txq->bd.queue_id = queue_idx;
> +	txq->bd.base = bd_base;
> +	txq->bd.cur = bd_base;
> +	txq->bd.d_size = dsize;
> +	txq->bd.d_size_log2 = dsize_log2;
> +	txq->bd.active_reg_desc = (uint8_t *)fep->hw_baseaddr_v +
> +			offset_des_active_txq[queue_idx];
> +	bd_base = (struct bufdesc *)(((uintptr_t)bd_base) + size);
> +	txq->bd.last = (struct bufdesc *)(((uintptr_t)bd_base) - dsize);
> +	bdp = txq->bd.base;
> +	bdp = txq->bd.cur;
> +
> +	for (i = 0; i < txq->bd.ring_size; i++) {
> +		/* Initialize the BD for every fragment in the page. */
> +		rte_write16(rte_cpu_to_le_16(0), &bdp->bd_sc);
> +		if (txq->tx_mbuf[i] != NULL) {
> +			rte_pktmbuf_free(txq->tx_mbuf[i]);
> +			txq->tx_mbuf[i] = NULL;
> +		}
> +		rte_write32(0, &bdp->bd_bufaddr);
> +		bdp = enet_get_nextdesc(bdp, &txq->bd);
> +	}
> +
> +	/* Set the last buffer to wrap */
> +	bdp = enet_get_prevdesc(bdp, &txq->bd);
> +	rte_write16((rte_cpu_to_le_16(TX_BD_WRAP) |
> +		rte_read16(&bdp->bd_sc)), &bdp->bd_sc);
> +	txq->dirty_tx = bdp;
> +	dev->data->tx_queues[queue_idx] = fep->tx_queues[queue_idx];
> +	return 0;
> +}
> +
> +static int
> +enetfec_rx_queue_setup(struct rte_eth_dev *dev,
> +			uint16_t queue_idx,
> +			uint16_t nb_rx_desc,
> +			unsigned int socket_id __rte_unused,
> +			const struct rte_eth_rxconf *rx_conf,
> +			struct rte_mempool *mb_pool)
> +{
> +	struct enetfec_private *fep = dev->data->dev_private;
> +	unsigned int i;
> +	struct bufdesc *bd_base;
> +	struct bufdesc *bdp;
> +	struct enetfec_priv_rx_q *rxq;
> +	unsigned int size;
> +	unsigned int dsize = fep->bufdesc_ex ? sizeof(struct bufdesc_ex) :
> +			sizeof(struct bufdesc);
> +	unsigned int dsize_log2 = fls64(dsize);
> +
> +	/* Rx deferred start is not supported */
> +	if (rx_conf->rx_deferred_start) {
> +		ENETFEC_PMD_ERR("%p:Rx deferred start not supported",
> +			(void *)dev);
> +		return -EINVAL;
> +	}
> +
> +	/* allocate receive queue */
> +	rxq = rte_zmalloc(NULL, sizeof(*rxq), RTE_CACHE_LINE_SIZE);
> +	if (rxq == NULL) {
> +		ENETFEC_PMD_ERR("receive queue allocation failed");
> +		return -ENOMEM;
> +	}
> +
> +	if (nb_rx_desc > MAX_RX_BD_RING_SIZE) {
> +		nb_rx_desc = MAX_RX_BD_RING_SIZE;
> +		ENETFEC_PMD_WARN("modified the nb_desc to MAX_RX_BD_RING_SIZE\n");
> +	}
> +
> +	rxq->bd.ring_size = nb_rx_desc;
> +	fep->total_rx_ring_size += rxq->bd.ring_size;
> +	fep->rx_queues[queue_idx] = rxq;
> +
> +	rte_write32(rte_cpu_to_le_32(fep->bd_addr_p_r[queue_idx]),
> +		(uint8_t *)fep->hw_baseaddr_v + ENETFEC_RD_START(queue_idx));
> +	rte_write32(rte_cpu_to_le_32(PKT_MAX_BUF_SIZE),
> +		(uint8_t *)fep->hw_baseaddr_v + ENETFEC_MRB_SIZE(queue_idx));
> +
> +	/* Set receive descriptor base. */
> +	rxq = fep->rx_queues[queue_idx];
> +	rxq->pool = mb_pool;
> +	size = dsize * rxq->bd.ring_size;
> +	bd_base = (struct bufdesc *)fep->dma_baseaddr_r[queue_idx];
> +	rxq->bd.queue_id = queue_idx;
> +	rxq->bd.base = bd_base;
> +	rxq->bd.cur = bd_base;
> +	rxq->bd.d_size = dsize;
> +	rxq->bd.d_size_log2 = dsize_log2;
> +	rxq->bd.active_reg_desc = (uint8_t *)fep->hw_baseaddr_v +
> +			offset_des_active_rxq[queue_idx];
> +	bd_base = (struct bufdesc *)(((uintptr_t)bd_base) + size);
> +	rxq->bd.last = (struct bufdesc *)(((uintptr_t)bd_base) - dsize);
> +
> +	rxq->fep = fep;
> +	bdp = rxq->bd.base;
> +	rxq->bd.cur = bdp;
> +
> +	for (i = 0; i < nb_rx_desc; i++) {
> +		/* Initialize Rx buffers from pktmbuf pool */
> +		struct rte_mbuf *mbuf = rte_pktmbuf_alloc(mb_pool);
> +		if (mbuf == NULL) {
> +			ENETFEC_PMD_ERR("mbuf failed\n");
> +		goto err_alloc;

Wrong indentation.