diff options
Diffstat (limited to 'drivers/net/ena/ena_ethdev.c')
| -rw-r--r-- | drivers/net/ena/ena_ethdev.c | 1455 |
1 files changed, 1455 insertions, 0 deletions
diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c new file mode 100644 index 00000000..02af67a2 --- /dev/null +++ b/drivers/net/ena/ena_ethdev.c @@ -0,0 +1,1455 @@ +/*- +* BSD LICENSE +* +* Copyright (c) 2015-2016 Amazon.com, Inc. or its affiliates. +* All rights reserved. +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions +* are met: +* +* * Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* * 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. +* * Neither the name of copyright holder 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. +*/ + +#include <rte_ether.h> +#include <rte_ethdev.h> +#include <rte_tcp.h> +#include <rte_atomic.h> +#include <rte_dev.h> +#include <rte_errno.h> + +#include "ena_ethdev.h" +#include "ena_logs.h" +#include "ena_platform.h" +#include "ena_com.h" +#include "ena_eth_com.h" + +#include <ena_common_defs.h> +#include <ena_regs_defs.h> +#include <ena_admin_defs.h> +#include <ena_eth_io_defs.h> + +#define ENA_IO_TXQ_IDX(q) (2 * (q)) +#define ENA_IO_RXQ_IDX(q) (2 * (q) + 1) +/*reverse version of ENA_IO_RXQ_IDX*/ +#define ENA_IO_RXQ_IDX_REV(q) ((q - 1) / 2) + +/* While processing submitted and completed descriptors (rx and tx path + * respectively) in a loop it is desired to: + * - perform batch submissions while populating sumbissmion queue + * - avoid blocking transmission of other packets during cleanup phase + * Hence the utilization ratio of 1/8 of a queue size. + */ +#define ENA_RING_DESCS_RATIO(ring_size) (ring_size / 8) + +#define __MERGE_64B_H_L(h, l) (((uint64_t)h << 32) | l) +#define TEST_BIT(val, bit_shift) (val & (1UL << bit_shift)) + +#define GET_L4_HDR_LEN(mbuf) \ + ((rte_pktmbuf_mtod_offset(mbuf, struct tcp_hdr *, \ + mbuf->l3_len + mbuf->l2_len)->data_off) >> 4) + +#define ENA_RX_RSS_TABLE_LOG_SIZE 7 +#define ENA_RX_RSS_TABLE_SIZE (1 << ENA_RX_RSS_TABLE_LOG_SIZE) +#define ENA_HASH_KEY_SIZE 40 + +/** Vendor ID used by Amazon devices */ +#define PCI_VENDOR_ID_AMAZON 0x1D0F +/** Amazon devices */ +#define PCI_DEVICE_ID_ENA_VF 0xEC20 +#define PCI_DEVICE_ID_ENA_LLQ_VF 0xEC21 + +static struct rte_pci_id pci_id_ena_map[] = { +#define RTE_PCI_DEV_ID_DECL_ENA(vend, dev) {RTE_PCI_DEVICE(vend, dev)}, + + RTE_PCI_DEV_ID_DECL_ENA(PCI_VENDOR_ID_AMAZON, PCI_DEVICE_ID_ENA_VF) + RTE_PCI_DEV_ID_DECL_ENA(PCI_VENDOR_ID_AMAZON, PCI_DEVICE_ID_ENA_LLQ_VF) + {.device_id = 0}, +}; + +static int ena_device_init(struct ena_com_dev *ena_dev, + struct ena_com_dev_get_features_ctx *get_feat_ctx); +static int ena_dev_configure(struct rte_eth_dev *dev); +static uint16_t eth_ena_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, + uint16_t nb_pkts); +static int ena_tx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx, + uint16_t nb_desc, unsigned int socket_id, + const struct rte_eth_txconf *tx_conf); +static int ena_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx, + uint16_t nb_desc, unsigned int socket_id, + const struct rte_eth_rxconf *rx_conf, + struct rte_mempool *mp); +static uint16_t eth_ena_recv_pkts(void *rx_queue, + struct rte_mbuf **rx_pkts, uint16_t nb_pkts); +static int ena_populate_rx_queue(struct ena_ring *rxq, unsigned int count); +static void ena_init_rings(struct ena_adapter *adapter); +static int ena_mtu_set(struct rte_eth_dev *dev, uint16_t mtu); +static int ena_start(struct rte_eth_dev *dev); +static void ena_close(struct rte_eth_dev *dev); +static void ena_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats); +static void ena_rx_queue_release_all(struct rte_eth_dev *dev); +static void ena_tx_queue_release_all(struct rte_eth_dev *dev); +static void ena_rx_queue_release(void *queue); +static void ena_tx_queue_release(void *queue); +static void ena_rx_queue_release_bufs(struct ena_ring *ring); +static void ena_tx_queue_release_bufs(struct ena_ring *ring); +static int ena_link_update(struct rte_eth_dev *dev, + __rte_unused int wait_to_complete); +static int ena_queue_restart(struct ena_ring *ring); +static int ena_queue_restart_all(struct rte_eth_dev *dev, + enum ena_ring_type ring_type); +static void ena_stats_restart(struct rte_eth_dev *dev); +static void ena_infos_get(__rte_unused struct rte_eth_dev *dev, + struct rte_eth_dev_info *dev_info); +static int ena_rss_reta_update(struct rte_eth_dev *dev, + struct rte_eth_rss_reta_entry64 *reta_conf, + uint16_t reta_size); +static int ena_rss_reta_query(struct rte_eth_dev *dev, + struct rte_eth_rss_reta_entry64 *reta_conf, + uint16_t reta_size); + +static struct eth_dev_ops ena_dev_ops = { + .dev_configure = ena_dev_configure, + .dev_infos_get = ena_infos_get, + .rx_queue_setup = ena_rx_queue_setup, + .tx_queue_setup = ena_tx_queue_setup, + .dev_start = ena_start, + .link_update = ena_link_update, + .stats_get = ena_stats_get, + .mtu_set = ena_mtu_set, + .rx_queue_release = ena_rx_queue_release, + .tx_queue_release = ena_tx_queue_release, + .dev_close = ena_close, + .reta_update = ena_rss_reta_update, + .reta_query = ena_rss_reta_query, +}; + +static inline void ena_rx_mbuf_prepare(struct rte_mbuf *mbuf, + struct ena_com_rx_ctx *ena_rx_ctx) +{ + uint64_t ol_flags = 0; + + if (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) + ol_flags |= PKT_TX_TCP_CKSUM; + else if (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP) + ol_flags |= PKT_TX_UDP_CKSUM; + + if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) + ol_flags |= PKT_TX_IPV4; + else if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV6) + ol_flags |= PKT_TX_IPV6; + + if (unlikely(ena_rx_ctx->l4_csum_err)) + ol_flags |= PKT_RX_L4_CKSUM_BAD; + if (unlikely(ena_rx_ctx->l3_csum_err)) + ol_flags |= PKT_RX_IP_CKSUM_BAD; + + mbuf->ol_flags = ol_flags; +} + +static inline void ena_tx_mbuf_prepare(struct rte_mbuf *mbuf, + struct ena_com_tx_ctx *ena_tx_ctx) +{ + struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta; + + if (mbuf->ol_flags & + (PKT_TX_L4_MASK | PKT_TX_IP_CKSUM | PKT_TX_TCP_SEG)) { + /* check if TSO is required */ + if (mbuf->ol_flags & PKT_TX_TCP_SEG) { + ena_tx_ctx->tso_enable = true; + + ena_meta->l4_hdr_len = GET_L4_HDR_LEN(mbuf); + } + + /* check if L3 checksum is needed */ + if (mbuf->ol_flags & PKT_TX_IP_CKSUM) + ena_tx_ctx->l3_csum_enable = true; + + if (mbuf->ol_flags & PKT_TX_IPV6) { + ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6; + } else { + ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4; + + /* set don't fragment (DF) flag */ + if (mbuf->packet_type & + (RTE_PTYPE_L4_NONFRAG + | RTE_PTYPE_INNER_L4_NONFRAG)) + ena_tx_ctx->df = true; + } + + /* check if L4 checksum is needed */ + switch (mbuf->ol_flags & PKT_TX_L4_MASK) { + case PKT_TX_TCP_CKSUM: + ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP; + ena_tx_ctx->l4_csum_enable = true; + break; + case PKT_TX_UDP_CKSUM: + ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP; + ena_tx_ctx->l4_csum_enable = true; + break; + default: + ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UNKNOWN; + ena_tx_ctx->l4_csum_enable = false; + break; + } + + ena_meta->mss = mbuf->tso_segsz; + ena_meta->l3_hdr_len = mbuf->l3_len; + ena_meta->l3_hdr_offset = mbuf->l2_len; + /* this param needed only for TSO */ + ena_meta->l3_outer_hdr_len = 0; + ena_meta->l3_outer_hdr_offset = 0; + + ena_tx_ctx->meta_valid = true; + } else { + ena_tx_ctx->meta_valid = false; + } +} + +static void ena_close(struct rte_eth_dev *dev) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + + adapter->state = ENA_ADAPTER_STATE_STOPPED; + + ena_rx_queue_release_all(dev); + ena_tx_queue_release_all(dev); +} + +static int ena_rss_reta_update(struct rte_eth_dev *dev, + struct rte_eth_rss_reta_entry64 *reta_conf, + uint16_t reta_size) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + struct ena_com_dev *ena_dev = &adapter->ena_dev; + int ret, i; + u16 entry_value; + int conf_idx; + int idx; + + if ((reta_size == 0) || (reta_conf == NULL)) + return -EINVAL; + + if (reta_size > ENA_RX_RSS_TABLE_SIZE) { + RTE_LOG(WARNING, PMD, + "indirection table %d is bigger than supported (%d)\n", + reta_size, ENA_RX_RSS_TABLE_SIZE); + ret = -EINVAL; + goto err; + } + + for (i = 0 ; i < reta_size ; i++) { + /* each reta_conf is for 64 entries. + * to support 128 we use 2 conf of 64 + */ + conf_idx = i / RTE_RETA_GROUP_SIZE; + idx = i % RTE_RETA_GROUP_SIZE; + if (TEST_BIT(reta_conf[conf_idx].mask, idx)) { + entry_value = + ENA_IO_RXQ_IDX(reta_conf[conf_idx].reta[idx]); + ret = ena_com_indirect_table_fill_entry(ena_dev, + i, + entry_value); + if (unlikely(ret && (ret != ENA_COM_PERMISSION))) { + RTE_LOG(ERR, PMD, + "Cannot fill indirect table\n"); + ret = -ENOTSUP; + goto err; + } + } + } + + ret = ena_com_indirect_table_set(ena_dev); + if (unlikely(ret && (ret != ENA_COM_PERMISSION))) { + RTE_LOG(ERR, PMD, "Cannot flush the indirect table\n"); + ret = -ENOTSUP; + goto err; + } + + RTE_LOG(DEBUG, PMD, "%s(): RSS configured %d entries for port %d\n", + __func__, reta_size, adapter->rte_dev->data->port_id); +err: + return ret; +} + +/* Query redirection table. */ +static int ena_rss_reta_query(struct rte_eth_dev *dev, + struct rte_eth_rss_reta_entry64 *reta_conf, + uint16_t reta_size) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + struct ena_com_dev *ena_dev = &adapter->ena_dev; + int ret; + int i; + u32 indirect_table[ENA_RX_RSS_TABLE_SIZE] = {0}; + int reta_conf_idx; + int reta_idx; + + if (reta_size == 0 || reta_conf == NULL || + (reta_size > RTE_RETA_GROUP_SIZE && ((reta_conf + 1) == NULL))) + return -EINVAL; + + ret = ena_com_indirect_table_get(ena_dev, indirect_table); + if (unlikely(ret && (ret != ENA_COM_PERMISSION))) { + RTE_LOG(ERR, PMD, "cannot get indirect table\n"); + ret = -ENOTSUP; + goto err; + } + + for (i = 0 ; i < reta_size ; i++) { + reta_conf_idx = i / RTE_RETA_GROUP_SIZE; + reta_idx = i % RTE_RETA_GROUP_SIZE; + if (TEST_BIT(reta_conf[reta_conf_idx].mask, reta_idx)) + reta_conf[reta_conf_idx].reta[reta_idx] = + ENA_IO_RXQ_IDX_REV(indirect_table[i]); + } +err: + return ret; +} + +static int ena_rss_init_default(struct ena_adapter *adapter) +{ + struct ena_com_dev *ena_dev = &adapter->ena_dev; + uint16_t nb_rx_queues = adapter->rte_dev->data->nb_rx_queues; + int rc, i; + u32 val; + + rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE); + if (unlikely(rc)) { + RTE_LOG(ERR, PMD, "Cannot init indirect table\n"); + goto err_rss_init; + } + + for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) { + val = i % nb_rx_queues; + rc = ena_com_indirect_table_fill_entry(ena_dev, i, + ENA_IO_RXQ_IDX(val)); + if (unlikely(rc && (rc != ENA_COM_PERMISSION))) { + RTE_LOG(ERR, PMD, "Cannot fill indirect table\n"); + goto err_fill_indir; + } + } + + rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL, + ENA_HASH_KEY_SIZE, 0xFFFFFFFF); + if (unlikely(rc && (rc != ENA_COM_PERMISSION))) { + RTE_LOG(INFO, PMD, "Cannot fill hash function\n"); + goto err_fill_indir; + } + + rc = ena_com_set_default_hash_ctrl(ena_dev); + if (unlikely(rc && (rc != ENA_COM_PERMISSION))) { + RTE_LOG(INFO, PMD, "Cannot fill hash control\n"); + goto err_fill_indir; + } + + rc = ena_com_indirect_table_set(ena_dev); + if (unlikely(rc && (rc != ENA_COM_PERMISSION))) { + RTE_LOG(ERR, PMD, "Cannot flush the indirect table\n"); + goto err_fill_indir; + } + RTE_LOG(DEBUG, PMD, "RSS configured for port %d\n", + adapter->rte_dev->data->port_id); + + return 0; + +err_fill_indir: + ena_com_rss_destroy(ena_dev); +err_rss_init: + + return rc; +} + +static void ena_rx_queue_release_all(struct rte_eth_dev *dev) +{ + struct ena_ring **queues = (struct ena_ring **)dev->data->rx_queues; + int nb_queues = dev->data->nb_rx_queues; + int i; + + for (i = 0; i < nb_queues; i++) + ena_rx_queue_release(queues[i]); +} + +static void ena_tx_queue_release_all(struct rte_eth_dev *dev) +{ + struct ena_ring **queues = (struct ena_ring **)dev->data->tx_queues; + int nb_queues = dev->data->nb_tx_queues; + int i; + + for (i = 0; i < nb_queues; i++) + ena_tx_queue_release(queues[i]); +} + +static void ena_rx_queue_release(void *queue) +{ + struct ena_ring *ring = (struct ena_ring *)queue; + struct ena_adapter *adapter = ring->adapter; + int ena_qid; + + ena_assert_msg(ring->configured, + "API violation - releasing not configured queue"); + ena_assert_msg(ring->adapter->state != ENA_ADAPTER_STATE_RUNNING, + "API violation"); + + /* Destroy HW queue */ + ena_qid = ENA_IO_RXQ_IDX(ring->id); + ena_com_destroy_io_queue(&adapter->ena_dev, ena_qid); + + /* Free all bufs */ + ena_rx_queue_release_bufs(ring); + + /* Free ring resources */ + if (ring->rx_buffer_info) + rte_free(ring->rx_buffer_info); + ring->rx_buffer_info = NULL; + + ring->configured = 0; + + RTE_LOG(NOTICE, PMD, "RX Queue %d:%d released\n", + ring->port_id, ring->id); +} + +static void ena_tx_queue_release(void *queue) +{ + struct ena_ring *ring = (struct ena_ring *)queue; + struct ena_adapter *adapter = ring->adapter; + int ena_qid; + + ena_assert_msg(ring->configured, + "API violation. Releasing not configured queue"); + ena_assert_msg(ring->adapter->state != ENA_ADAPTER_STATE_RUNNING, + "API violation"); + + /* Destroy HW queue */ + ena_qid = ENA_IO_TXQ_IDX(ring->id); + ena_com_destroy_io_queue(&adapter->ena_dev, ena_qid); + + /* Free all bufs */ + ena_tx_queue_release_bufs(ring); + + /* Free ring resources */ + if (ring->tx_buffer_info) + rte_free(ring->tx_buffer_info); + + if (ring->empty_tx_reqs) + rte_free(ring->empty_tx_reqs); + + ring->empty_tx_reqs = NULL; + ring->tx_buffer_info = NULL; + + ring->configured = 0; + + RTE_LOG(NOTICE, PMD, "TX Queue %d:%d released\n", + ring->port_id, ring->id); +} + +static void ena_rx_queue_release_bufs(struct ena_ring *ring) +{ + unsigned int ring_mask = ring->ring_size - 1; + + while (ring->next_to_clean != ring->next_to_use) { + struct rte_mbuf *m = + ring->rx_buffer_info[ring->next_to_clean & ring_mask]; + + if (m) + __rte_mbuf_raw_free(m); + + ring->next_to_clean = + ENA_CIRC_INC(ring->next_to_clean, 1, ring->ring_size); + } +} + +static void ena_tx_queue_release_bufs(struct ena_ring *ring) +{ + unsigned int ring_mask = ring->ring_size - 1; + + while (ring->next_to_clean != ring->next_to_use) { + struct ena_tx_buffer *tx_buf = + &ring->tx_buffer_info[ring->next_to_clean & ring_mask]; + + if (tx_buf->mbuf) + rte_pktmbuf_free(tx_buf->mbuf); + + ring->next_to_clean = + ENA_CIRC_INC(ring->next_to_clean, 1, ring->ring_size); + } +} + +static int ena_link_update(struct rte_eth_dev *dev, + __rte_unused int wait_to_complete) +{ + struct rte_eth_link *link = &dev->data->dev_link; + + link->link_status = 1; + link->link_speed = ETH_SPEED_NUM_10G; + link->link_duplex = ETH_LINK_FULL_DUPLEX; + + return 0; +} + +static int ena_queue_restart_all(struct rte_eth_dev *dev, + enum ena_ring_type ring_type) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + struct ena_ring *queues = NULL; + int i = 0; + int rc = 0; + + queues = (ring_type == ENA_RING_TYPE_RX) ? + adapter->rx_ring : adapter->tx_ring; + + for (i = 0; i < adapter->num_queues; i++) { + if (queues[i].configured) { + if (ring_type == ENA_RING_TYPE_RX) { + ena_assert_msg( + dev->data->rx_queues[i] == &queues[i], + "Inconsistent state of rx queues\n"); + } else { + ena_assert_msg( + dev->data->tx_queues[i] == &queues[i], + "Inconsistent state of tx queues\n"); + } + + rc = ena_queue_restart(&queues[i]); + + if (rc) { + PMD_INIT_LOG(ERR, + "failed to restart queue %d type(%d)\n", + i, ring_type); + return -1; + } + } + } + + return 0; +} + +static uint32_t ena_get_mtu_conf(struct ena_adapter *adapter) +{ + uint32_t max_frame_len = adapter->max_mtu; + + if (adapter->rte_eth_dev_data->dev_conf.rxmode.jumbo_frame == 1) + max_frame_len = + adapter->rte_eth_dev_data->dev_conf.rxmode.max_rx_pkt_len; + + return max_frame_len; +} + +static int ena_check_valid_conf(struct ena_adapter *adapter) +{ + uint32_t max_frame_len = ena_get_mtu_conf(adapter); + + if (max_frame_len > adapter->max_mtu) { + PMD_INIT_LOG(ERR, "Unsupported MTU of %d\n", max_frame_len); + return -1; + } + + return 0; +} + +static int +ena_calc_queue_size(struct ena_com_dev *ena_dev, + struct ena_com_dev_get_features_ctx *get_feat_ctx) +{ + uint32_t queue_size = ENA_DEFAULT_RING_SIZE; + + queue_size = RTE_MIN(queue_size, + get_feat_ctx->max_queues.max_cq_depth); + queue_size = RTE_MIN(queue_size, + get_feat_ctx->max_queues.max_sq_depth); + + if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) + queue_size = RTE_MIN(queue_size, + get_feat_ctx->max_queues.max_llq_depth); + + /* Round down to power of 2 */ + if (!rte_is_power_of_2(queue_size)) + queue_size = rte_align32pow2(queue_size >> 1); + + if (queue_size == 0) { + PMD_INIT_LOG(ERR, "Invalid queue size\n"); + return -EFAULT; + } + + return queue_size; +} + +static void ena_stats_restart(struct rte_eth_dev *dev) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + + rte_atomic64_init(&adapter->drv_stats->ierrors); + rte_atomic64_init(&adapter->drv_stats->oerrors); + rte_atomic64_init(&adapter->drv_stats->imcasts); + rte_atomic64_init(&adapter->drv_stats->rx_nombuf); +} + +static void ena_stats_get(struct rte_eth_dev *dev, + struct rte_eth_stats *stats) +{ + struct ena_admin_basic_stats ena_stats; + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + struct ena_com_dev *ena_dev = &adapter->ena_dev; + int rc; + + if (rte_eal_process_type() != RTE_PROC_PRIMARY) + return; + + memset(&ena_stats, 0, sizeof(ena_stats)); + rc = ena_com_get_dev_basic_stats(ena_dev, &ena_stats); + if (unlikely(rc)) { + RTE_LOG(ERR, PMD, "Could not retrieve statistics from ENA"); + return; + } + + /* Set of basic statistics from ENA */ + stats->ipackets = __MERGE_64B_H_L(ena_stats.rx_pkts_high, + ena_stats.rx_pkts_low); + stats->opackets = __MERGE_64B_H_L(ena_stats.tx_pkts_high, + ena_stats.tx_pkts_low); + stats->ibytes = __MERGE_64B_H_L(ena_stats.rx_bytes_high, + ena_stats.rx_bytes_low); + stats->obytes = __MERGE_64B_H_L(ena_stats.tx_bytes_high, + ena_stats.tx_bytes_low); + stats->imissed = __MERGE_64B_H_L(ena_stats.rx_drops_high, + ena_stats.rx_drops_low); + + /* Driver related stats */ + stats->ierrors = rte_atomic64_read(&adapter->drv_stats->ierrors); + stats->oerrors = rte_atomic64_read(&adapter->drv_stats->oerrors); + stats->imcasts = rte_atomic64_read(&adapter->drv_stats->imcasts); + stats->rx_nombuf = rte_atomic64_read(&adapter->drv_stats->rx_nombuf); +} + +static int ena_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) +{ + struct ena_adapter *adapter; + struct ena_com_dev *ena_dev; + int rc = 0; + + ena_assert_msg(dev->data != NULL, "Uninitialized device"); + ena_assert_msg(dev->data->dev_private != NULL, "Uninitialized device"); + adapter = (struct ena_adapter *)(dev->data->dev_private); + + ena_dev = &adapter->ena_dev; + ena_assert_msg(ena_dev != NULL, "Uninitialized device"); + + if (mtu > ena_get_mtu_conf(adapter)) { + RTE_LOG(ERR, PMD, + "Given MTU (%d) exceeds maximum MTU supported (%d)\n", + mtu, ena_get_mtu_conf(adapter)); + rc = -EINVAL; + goto err; + } + + rc = ena_com_set_dev_mtu(ena_dev, mtu); + if (rc) + RTE_LOG(ERR, PMD, "Could not set MTU: %d\n", mtu); + else + RTE_LOG(NOTICE, PMD, "Set MTU: %d\n", mtu); + +err: + return rc; +} + +static int ena_start(struct rte_eth_dev *dev) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + int rc = 0; + + if (!(adapter->state == ENA_ADAPTER_STATE_CONFIG || + adapter->state == ENA_ADAPTER_STATE_STOPPED)) { + PMD_INIT_LOG(ERR, "API violation"); + return -1; + } + + rc = ena_check_valid_conf(adapter); + if (rc) + return rc; + + rc = ena_queue_restart_all(dev, ENA_RING_TYPE_RX); + if (rc) + return rc; + + rc = ena_queue_restart_all(dev, ENA_RING_TYPE_TX); + if (rc) + return rc; + + if (adapter->rte_dev->data->dev_conf.rxmode.mq_mode & + ETH_MQ_RX_RSS_FLAG) { + rc = ena_rss_init_default(adapter); + if (rc) + return rc; + } + + ena_stats_restart(dev); + + adapter->state = ENA_ADAPTER_STATE_RUNNING; + + return 0; +} + +static int ena_queue_restart(struct ena_ring *ring) +{ + int rc; + + ena_assert_msg(ring->configured == 1, + "Trying to restart unconfigured queue\n"); + + ring->next_to_clean = 0; + ring->next_to_use = 0; + + if (ring->type == ENA_RING_TYPE_TX) + return 0; + + rc = ena_populate_rx_queue(ring, ring->ring_size - 1); + if ((unsigned int)rc != ring->ring_size - 1) { + PMD_INIT_LOG(ERR, "Failed to populate rx ring !\n"); + return (-1); + } + + return 0; +} + +static int ena_tx_queue_setup(struct rte_eth_dev *dev, + uint16_t queue_idx, + uint16_t nb_desc, + __rte_unused unsigned int socket_id, + __rte_unused const struct rte_eth_txconf *tx_conf) +{ + struct ena_ring *txq = NULL; + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + unsigned int i; + int ena_qid; + int rc; + struct ena_com_dev *ena_dev = &adapter->ena_dev; + + txq = &adapter->tx_ring[queue_idx]; + + if (txq->configured) { + RTE_LOG(CRIT, PMD, + "API violation. Queue %d is already configured\n", + queue_idx); + return -1; + } + + if (nb_desc > adapter->tx_ring_size) { + RTE_LOG(ERR, PMD, + "Unsupported size of TX queue (max size: %d)\n", + adapter->tx_ring_size); + return -EINVAL; + } + + ena_qid = ENA_IO_TXQ_IDX(queue_idx); + rc = ena_com_create_io_queue(ena_dev, ena_qid, + ENA_COM_IO_QUEUE_DIRECTION_TX, + ena_dev->tx_mem_queue_type, + -1 /* admin interrupts is not used */, + nb_desc); + if (rc) { + RTE_LOG(ERR, PMD, + "failed to create io TX queue #%d (qid:%d) rc: %d\n", + queue_idx, ena_qid, rc); + } + txq->ena_com_io_cq = &ena_dev->io_cq_queues[ena_qid]; + txq->ena_com_io_sq = &ena_dev->io_sq_queues[ena_qid]; + + txq->port_id = dev->data->port_id; + txq->next_to_clean = 0; + txq->next_to_use = 0; + txq->ring_size = nb_desc; + + txq->tx_buffer_info = rte_zmalloc("txq->tx_buffer_info", + sizeof(struct ena_tx_buffer) * + txq->ring_size, + RTE_CACHE_LINE_SIZE); + if (!txq->tx_buffer_info) { + RTE_LOG(ERR, PMD, "failed to alloc mem for tx buffer info\n"); + return -ENOMEM; + } + + txq->empty_tx_reqs = rte_zmalloc("txq->empty_tx_reqs", + sizeof(u16) * txq->ring_size, + RTE_CACHE_LINE_SIZE); + if (!txq->empty_tx_reqs) { + RTE_LOG(ERR, PMD, "failed to alloc mem for tx reqs\n"); + rte_free(txq->tx_buffer_info); + return -ENOMEM; + } + for (i = 0; i < txq->ring_size; i++) + txq->empty_tx_reqs[i] = i; + + /* Store pointer to this queue in upper layer */ + txq->configured = 1; + dev->data->tx_queues[queue_idx] = txq; + + return rc; +} + +static int ena_rx_queue_setup(struct rte_eth_dev *dev, + uint16_t queue_idx, + uint16_t nb_desc, + __rte_unused unsigned int socket_id, + __rte_unused const struct rte_eth_rxconf *rx_conf, + struct rte_mempool *mp) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + struct ena_ring *rxq = NULL; + uint16_t ena_qid = 0; + int rc = 0; + struct ena_com_dev *ena_dev = &adapter->ena_dev; + + rxq = &adapter->rx_ring[queue_idx]; + if (rxq->configured) { + RTE_LOG(CRIT, PMD, + "API violation. Queue %d is already configured\n", + queue_idx); + return -1; + } + + if (nb_desc > adapter->rx_ring_size) { + RTE_LOG(ERR, PMD, + "Unsupported size of RX queue (max size: %d)\n", + adapter->rx_ring_size); + return -EINVAL; + } + + ena_qid = ENA_IO_RXQ_IDX(queue_idx); + rc = ena_com_create_io_queue(ena_dev, ena_qid, + ENA_COM_IO_QUEUE_DIRECTION_RX, + ENA_ADMIN_PLACEMENT_POLICY_HOST, + -1 /* admin interrupts not used */, + nb_desc); + if (rc) + RTE_LOG(ERR, PMD, "failed to create io RX queue #%d rc: %d\n", + queue_idx, rc); + + rxq->ena_com_io_cq = &ena_dev->io_cq_queues[ena_qid]; + rxq->ena_com_io_sq = &ena_dev->io_sq_queues[ena_qid]; + + rxq->port_id = dev->data->port_id; + rxq->next_to_clean = 0; + rxq->next_to_use = 0; + rxq->ring_size = nb_desc; + rxq->mb_pool = mp; + + rxq->rx_buffer_info = rte_zmalloc("rxq->buffer_info", + sizeof(struct rte_mbuf *) * nb_desc, + RTE_CACHE_LINE_SIZE); + if (!rxq->rx_buffer_info) { + RTE_LOG(ERR, PMD, "failed to alloc mem for rx buffer info\n"); + return -ENOMEM; + } + + /* Store pointer to this queue in upper layer */ + rxq->configured = 1; + dev->data->rx_queues[queue_idx] = rxq; + + return rc; +} + +static int ena_populate_rx_queue(struct ena_ring *rxq, unsigned int count) +{ + unsigned int i; + int rc; + unsigned int ring_size = rxq->ring_size; + unsigned int ring_mask = ring_size - 1; + int next_to_use = rxq->next_to_use & ring_mask; + struct rte_mbuf **mbufs = &rxq->rx_buffer_info[0]; + + if (unlikely(!count)) + return 0; + + ena_assert_msg((((ENA_CIRC_COUNT(rxq->next_to_use, rxq->next_to_clean, + rxq->ring_size)) + + count) < rxq->ring_size), "bad ring state"); + + count = RTE_MIN(count, ring_size - next_to_use); + + /* get resources for incoming packets */ + rc = rte_mempool_get_bulk(rxq->mb_pool, + (void **)(&mbufs[next_to_use]), count); + if (unlikely(rc < 0)) { + rte_atomic64_inc(&rxq->adapter->drv_stats->rx_nombuf); + PMD_RX_LOG(DEBUG, "there are no enough free buffers"); + return 0; + } + + for (i = 0; i < count; i++) { + struct rte_mbuf *mbuf = mbufs[next_to_use]; + struct ena_com_buf ebuf; + + rte_prefetch0(mbufs[((next_to_use + 4) & ring_mask)]); + /* prepare physical address for DMA transaction */ + ebuf.paddr = mbuf->buf_physaddr + RTE_PKTMBUF_HEADROOM; + ebuf.len = mbuf->buf_len - RTE_PKTMBUF_HEADROOM; + /* pass resource to device */ + rc = ena_com_add_single_rx_desc(rxq->ena_com_io_sq, + &ebuf, next_to_use); + if (unlikely(rc)) { + RTE_LOG(WARNING, PMD, "failed adding rx desc\n"); + break; + } + next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use, ring_size); + } + + rte_wmb(); + rxq->next_to_use = next_to_use; + /* let HW know that it can fill buffers with data */ + ena_com_write_sq_doorbell(rxq->ena_com_io_sq); + + return i; +} + +static int ena_device_init(struct ena_com_dev *ena_dev, + struct ena_com_dev_get_features_ctx *get_feat_ctx) +{ + int rc; + + /* Initialize mmio registers */ + rc = ena_com_mmio_reg_read_request_init(ena_dev); + if (rc) { + RTE_LOG(ERR, PMD, "failed to init mmio read less\n"); + return rc; + } + + /* reset device */ + rc = ena_com_dev_reset(ena_dev); + if (rc) { + RTE_LOG(ERR, PMD, "cannot reset device\n"); + goto err_mmio_read_less; + } + + /* check FW version */ + rc = ena_com_validate_version(ena_dev); + if (rc) { + RTE_LOG(ERR, PMD, "device version is too low\n"); + goto err_mmio_read_less; + } + + ena_dev->dma_addr_bits = ena_com_get_dma_width(ena_dev); + + /* ENA device administration layer init */ + rc = ena_com_admin_init(ena_dev, NULL, true); + if (rc) { + RTE_LOG(ERR, PMD, + "cannot initialize ena admin queue with device\n"); + goto err_mmio_read_less; + } + + /* To enable the msix interrupts the driver needs to know the number + * of queues. So the driver uses polling mode to retrieve this + * information. + */ + ena_com_set_admin_polling_mode(ena_dev, true); + + /* Get Device Attributes and features */ + rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx); + if (rc) { + RTE_LOG(ERR, PMD, + "cannot get attribute for ena device rc= %d\n", rc); + goto err_admin_init; + } + + return 0; + +err_admin_init: + ena_com_admin_destroy(ena_dev); + +err_mmio_read_less: + ena_com_mmio_reg_read_request_destroy(ena_dev); + + return rc; +} + +static int eth_ena_dev_init(struct rte_eth_dev *eth_dev) +{ + struct rte_pci_device *pci_dev; + struct ena_adapter *adapter = + (struct ena_adapter *)(eth_dev->data->dev_private); + struct ena_com_dev *ena_dev = &adapter->ena_dev; + struct ena_com_dev_get_features_ctx get_feat_ctx; + int queue_size, rc; + + static int adapters_found; + + memset(adapter, 0, sizeof(struct ena_adapter)); + ena_dev = &adapter->ena_dev; + + eth_dev->dev_ops = &ena_dev_ops; + eth_dev->rx_pkt_burst = ð_ena_recv_pkts; + eth_dev->tx_pkt_burst = ð_ena_xmit_pkts; + adapter->rte_eth_dev_data = eth_dev->data; + adapter->rte_dev = eth_dev; + + if (rte_eal_process_type() != RTE_PROC_PRIMARY) + return 0; + + pci_dev = eth_dev->pci_dev; + adapter->pdev = pci_dev; + + PMD_INIT_LOG(INFO, "Initializing %x:%x:%x.%d\n", + pci_dev->addr.domain, + pci_dev->addr.bus, + pci_dev->addr.devid, + pci_dev->addr.function); + + adapter->regs = pci_dev->mem_resource[ENA_REGS_BAR].addr; + adapter->dev_mem_base = pci_dev->mem_resource[ENA_MEM_BAR].addr; + + /* Present ENA_MEM_BAR indicates available LLQ mode. + * Use corresponding policy + */ + if (adapter->dev_mem_base) + ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV; + else if (adapter->regs) + ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST; + else + PMD_INIT_LOG(CRIT, "Failed to access registers BAR(%d)\n", + ENA_REGS_BAR); + + ena_dev->reg_bar = adapter->regs; + ena_dev->dmadev = adapter->pdev; + + adapter->id_number = adapters_found; + + snprintf(adapter->name, ENA_NAME_MAX_LEN, "ena_%d", + adapter->id_number); + + /* device specific initialization routine */ + rc = ena_device_init(ena_dev, &get_feat_ctx); + if (rc) { + PMD_INIT_LOG(CRIT, "Failed to init ENA device\n"); + return -1; + } + + if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) { + if (get_feat_ctx.max_queues.max_llq_num == 0) { + PMD_INIT_LOG(ERR, + "Trying to use LLQ but llq_num is 0.\n" + "Fall back into regular queues.\n"); + ena_dev->tx_mem_queue_type = + ENA_ADMIN_PLACEMENT_POLICY_HOST; + adapter->num_queues = + get_feat_ctx.max_queues.max_sq_num; + } else { + adapter->num_queues = + get_feat_ctx.max_queues.max_llq_num; + } + } else { + adapter->num_queues = get_feat_ctx.max_queues.max_sq_num; + } + + queue_size = ena_calc_queue_size(ena_dev, &get_feat_ctx); + if ((queue_size <= 0) || (adapter->num_queues <= 0)) + return -EFAULT; + + adapter->tx_ring_size = queue_size; + adapter->rx_ring_size = queue_size; + + /* prepare ring structures */ + ena_init_rings(adapter); + + /* Set max MTU for this device */ + adapter->max_mtu = get_feat_ctx.dev_attr.max_mtu; + + /* Copy MAC address and point DPDK to it */ + eth_dev->data->mac_addrs = (struct ether_addr *)adapter->mac_addr; + ether_addr_copy((struct ether_addr *)get_feat_ctx.dev_attr.mac_addr, + (struct ether_addr *)adapter->mac_addr); + + adapter->drv_stats = rte_zmalloc("adapter stats", + sizeof(*adapter->drv_stats), + RTE_CACHE_LINE_SIZE); + if (!adapter->drv_stats) { + RTE_LOG(ERR, PMD, "failed to alloc mem for adapter stats\n"); + return -ENOMEM; + } + + adapters_found++; + adapter->state = ENA_ADAPTER_STATE_INIT; + + return 0; +} + +static int ena_dev_configure(struct rte_eth_dev *dev) +{ + struct ena_adapter *adapter = + (struct ena_adapter *)(dev->data->dev_private); + + if (!(adapter->state == ENA_ADAPTER_STATE_INIT || + adapter->state == ENA_ADAPTER_STATE_STOPPED)) { + PMD_INIT_LOG(ERR, "Illegal adapter state: %d\n", + adapter->state); + return -1; + } + + switch (adapter->state) { + case ENA_ADAPTER_STATE_INIT: + case ENA_ADAPTER_STATE_STOPPED: + adapter->state = ENA_ADAPTER_STATE_CONFIG; + break; + case ENA_ADAPTER_STATE_CONFIG: + RTE_LOG(WARNING, PMD, + "Ivalid driver state while trying to configure device\n"); + break; + default: + break; + } + + return 0; +} + +static void ena_init_rings(struct ena_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_queues; i++) { + struct ena_ring *ring = &adapter->tx_ring[i]; + + ring->configured = 0; + ring->type = ENA_RING_TYPE_TX; + ring->adapter = adapter; + ring->id = i; + ring->tx_mem_queue_type = adapter->ena_dev.tx_mem_queue_type; + ring->tx_max_header_size = adapter->ena_dev.tx_max_header_size; + } + + for (i = 0; i < adapter->num_queues; i++) { + struct ena_ring *ring = &adapter->rx_ring[i]; + + ring->configured = 0; + ring->type = ENA_RING_TYPE_RX; + ring->adapter = adapter; + ring->id = i; + } +} + +static void ena_infos_get(struct rte_eth_dev *dev, + struct rte_eth_dev_info *dev_info) +{ + struct ena_adapter *adapter; + struct ena_com_dev *ena_dev; + struct ena_com_dev_get_features_ctx feat; + uint32_t rx_feat = 0, tx_feat = 0; + int rc = 0; + + ena_assert_msg(dev->data != NULL, "Uninitialized device"); + ena_assert_msg(dev->data->dev_private != NULL, "Uninitialized device"); + adapter = (struct ena_adapter *)(dev->data->dev_private); + + ena_dev = &adapter->ena_dev; + ena_assert_msg(ena_dev != NULL, "Uninitialized device"); + + dev_info->speed_capa = + ETH_LINK_SPEED_1G | + ETH_LINK_SPEED_2_5G | + ETH_LINK_SPEED_5G | + ETH_LINK_SPEED_10G | + ETH_LINK_SPEED_25G | + ETH_LINK_SPEED_40G | + ETH_LINK_SPEED_50G | + ETH_LINK_SPEED_100G; + + /* Get supported features from HW */ + rc = ena_com_get_dev_attr_feat(ena_dev, &feat); + if (unlikely(rc)) { + RTE_LOG(ERR, PMD, + "Cannot get attribute for ena device rc= %d\n", rc); + return; + } + + /* Set Tx & Rx features available for device */ + if (feat.offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK) + tx_feat |= DEV_TX_OFFLOAD_TCP_TSO; + + if (feat.offload.tx & + ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK) + tx_feat |= DEV_TX_OFFLOAD_IPV4_CKSUM | + DEV_TX_OFFLOAD_UDP_CKSUM | + DEV_TX_OFFLOAD_TCP_CKSUM; + + if (feat.offload.tx & + ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK) + rx_feat |= DEV_RX_OFFLOAD_IPV4_CKSUM | + DEV_RX_OFFLOAD_UDP_CKSUM | + DEV_RX_OFFLOAD_TCP_CKSUM; + + /* Inform framework about available features */ + dev_info->rx_offload_capa = rx_feat; + dev_info->tx_offload_capa = tx_feat; + + dev_info->min_rx_bufsize = ENA_MIN_FRAME_LEN; + dev_info->max_rx_pktlen = adapter->max_mtu; + dev_info->max_mac_addrs = 1; + + dev_info->max_rx_queues = adapter->num_queues; + dev_info->max_tx_queues = adapter->num_queues; + dev_info->reta_size = ENA_RX_RSS_TABLE_SIZE; +} + +static uint16_t eth_ena_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, + uint16_t nb_pkts) +{ + struct ena_ring *rx_ring = (struct ena_ring *)(rx_queue); + unsigned int ring_size = rx_ring->ring_size; + unsigned int ring_mask = ring_size - 1; + uint16_t next_to_clean = rx_ring->next_to_clean; + int desc_in_use = 0; + unsigned int recv_idx = 0; + struct rte_mbuf *mbuf = NULL; + struct rte_mbuf *mbuf_head = NULL; + struct rte_mbuf *mbuf_prev = NULL; + struct rte_mbuf **rx_buff_info = rx_ring->rx_buffer_info; + unsigned int completed; + + struct ena_com_rx_ctx ena_rx_ctx; + int rc = 0; + + /* Check adapter state */ + if (unlikely(rx_ring->adapter->state != ENA_ADAPTER_STATE_RUNNING)) { + RTE_LOG(ALERT, PMD, + "Trying to receive pkts while device is NOT running\n"); + return 0; + } + + desc_in_use = ENA_CIRC_COUNT(rx_ring->next_to_use, + next_to_clean, ring_size); + if (unlikely(nb_pkts > desc_in_use)) + nb_pkts = desc_in_use; + + for (completed = 0; completed < nb_pkts; completed++) { + int segments = 0; + + ena_rx_ctx.max_bufs = rx_ring->ring_size; + ena_rx_ctx.ena_bufs = rx_ring->ena_bufs; + ena_rx_ctx.descs = 0; + /* receive packet context */ + rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq, + rx_ring->ena_com_io_sq, + &ena_rx_ctx); + if (unlikely(rc)) { + RTE_LOG(ERR, PMD, "ena_com_rx_pkt error %d\n", rc); + return 0; + } + + if (unlikely(ena_rx_ctx.descs == 0)) + break; + + while (segments < ena_rx_ctx.descs) { + mbuf = rx_buff_info[next_to_clean & ring_mask]; + mbuf->data_len = ena_rx_ctx.ena_bufs[segments].len; + mbuf->data_off = RTE_PKTMBUF_HEADROOM; + mbuf->refcnt = 1; + mbuf->next = NULL; + if (segments == 0) { + mbuf->nb_segs = ena_rx_ctx.descs; + mbuf->port = rx_ring->port_id; + mbuf->pkt_len = 0; + mbuf_head = mbuf; + } else { + /* for multi-segment pkts create mbuf chain */ + mbuf_prev->next = mbuf; + } + mbuf_head->pkt_len += mbuf->data_len; + + mbuf_prev = mbuf; + segments++; + next_to_clean = + ENA_RX_RING_IDX_NEXT(next_to_clean, ring_size); + } + + /* fill mbuf attributes if any */ + ena_rx_mbuf_prepare(mbuf_head, &ena_rx_ctx); + mbuf_head->hash.rss = (uint32_t)rx_ring->id; + + /* pass to DPDK application head mbuf */ + rx_pkts[recv_idx] = mbuf_head; + recv_idx++; + } + + /* Burst refill to save doorbells, memory barriers, const interval */ + if (ring_size - desc_in_use - 1 > ENA_RING_DESCS_RATIO(ring_size)) + ena_populate_rx_queue(rx_ring, ring_size - desc_in_use - 1); + + rx_ring->next_to_clean = next_to_clean & ring_mask; + + return recv_idx; +} + +static uint16_t eth_ena_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, + uint16_t nb_pkts) +{ + struct ena_ring *tx_ring = (struct ena_ring *)(tx_queue); + unsigned int next_to_use = tx_ring->next_to_use; + struct rte_mbuf *mbuf; + unsigned int ring_size = tx_ring->ring_size; + unsigned int ring_mask = ring_size - 1; + struct ena_com_tx_ctx ena_tx_ctx; + struct ena_tx_buffer *tx_info; + struct ena_com_buf *ebuf; + uint16_t rc, req_id, total_tx_descs = 0; + int sent_idx = 0; + int nb_hw_desc; + + /* Check adapter state */ + if (unlikely(tx_ring->adapter->state != ENA_ADAPTER_STATE_RUNNING)) { + RTE_LOG(ALERT, PMD, + "Trying to xmit pkts while device is NOT running\n"); + return 0; + } + + for (sent_idx = 0; sent_idx < nb_pkts; sent_idx++) { + mbuf = tx_pkts[sent_idx]; + + req_id = tx_ring->empty_tx_reqs[next_to_use]; + tx_info = &tx_ring->tx_buffer_info[req_id]; + tx_info->mbuf = mbuf; + tx_info->num_of_bufs = 0; + ebuf = tx_info->bufs; + + /* Prepare TX context */ + memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx)); + memset(&ena_tx_ctx.ena_meta, 0x0, + sizeof(struct ena_com_tx_meta)); + ena_tx_ctx.ena_bufs = ebuf; + ena_tx_ctx.req_id = req_id; + if (tx_ring->tx_mem_queue_type == + ENA_ADMIN_PLACEMENT_POLICY_DEV) { + /* prepare the push buffer with + * virtual address of the data + */ + ena_tx_ctx.header_len = + RTE_MIN(mbuf->data_len, + tx_ring->tx_max_header_size); + ena_tx_ctx.push_header = + (void *)((char *)mbuf->buf_addr + + mbuf->data_off); + } /* there's no else as we take advantage of memset zeroing */ + + /* Set TX offloads flags, if applicable */ + ena_tx_mbuf_prepare(mbuf, &ena_tx_ctx); + + if (unlikely(mbuf->ol_flags & + (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD))) + rte_atomic64_inc(&tx_ring->adapter->drv_stats->ierrors); + + rte_prefetch0(tx_pkts[(sent_idx + 4) & ring_mask]); + + /* Process first segment taking into + * consideration pushed header + */ + if (mbuf->data_len > ena_tx_ctx.header_len) { + ebuf->paddr = mbuf->buf_physaddr + + mbuf->data_off + + ena_tx_ctx.header_len; + ebuf->len = mbuf->data_len - ena_tx_ctx.header_len; + ebuf++; + tx_info->num_of_bufs++; + } + + while ((mbuf = mbuf->next) != NULL) { + ebuf->paddr = mbuf->buf_physaddr + mbuf->data_off; + ebuf->len = mbuf->data_len; + ebuf++; + tx_info->num_of_bufs++; + } + + ena_tx_ctx.num_bufs = tx_info->num_of_bufs; + + /* Write data to device */ + rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, + &ena_tx_ctx, &nb_hw_desc); + if (unlikely(rc)) + break; + + tx_info->tx_descs = nb_hw_desc; + + next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use, ring_size); + } + + /* Let HW do it's best :-) */ + rte_wmb(); + ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq); + + /* Clear complete packets */ + while (ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq, &req_id) >= 0) { + /* Get Tx info & store how many descs were processed */ + tx_info = &tx_ring->tx_buffer_info[req_id]; + total_tx_descs += tx_info->tx_descs; + + /* Free whole mbuf chain */ + mbuf = tx_info->mbuf; + rte_pktmbuf_free(mbuf); + + /* Put back descriptor to the ring for reuse */ + tx_ring->empty_tx_reqs[tx_ring->next_to_clean] = req_id; + tx_ring->next_to_clean = + ENA_TX_RING_IDX_NEXT(tx_ring->next_to_clean, + tx_ring->ring_size); + + /* If too many descs to clean, leave it for another run */ + if (unlikely(total_tx_descs > ENA_RING_DESCS_RATIO(ring_size))) + break; + } + + /* acknowledge completion of sent packets */ + ena_com_comp_ack(tx_ring->ena_com_io_sq, total_tx_descs); + tx_ring->next_to_use = next_to_use; + return sent_idx; +} + +static struct eth_driver rte_ena_pmd = { + { + .name = "rte_ena_pmd", + .id_table = pci_id_ena_map, + .drv_flags = RTE_PCI_DRV_NEED_MAPPING, + }, + .eth_dev_init = eth_ena_dev_init, + .dev_private_size = sizeof(struct ena_adapter), +}; + +static int +rte_ena_pmd_init(const char *name __rte_unused, + const char *params __rte_unused) +{ + rte_eth_driver_register(&rte_ena_pmd); + return 0; +}; + +struct rte_driver ena_pmd_drv = { + .name = "ena_driver", + .type = PMD_PDEV, + .init = rte_ena_pmd_init, +}; + +PMD_REGISTER_DRIVER(ena_pmd_drv); |