From: Ilias Apalodimas <ilias.apalodi...@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodi...@linaro.org>
Signed-off-by: Mykyta Iziumtsev <mykyta.iziumt...@linaro.org>
---
/** Email created from pull request 383 (MykytaI:caterpillar_mdev_cxgb4)
** https://github.com/Linaro/odp/pull/383
** Patch: https://github.com/Linaro/odp/pull/383.patch
** Base sha: ea7b4281992e3cf772fb84708ed7f3985bce78e7
** Merge commit sha: ada243973a9be91da63a389068ba881b853dc118
**/
platform/linux-generic/Makefile.am | 1 +
platform/linux-generic/pktio/mdev/cxgb4.c | 887 ++++++++++++++++++++++++++++++
platform/linux-generic/pktio/subsystem.c | 6 +
3 files changed, 894 insertions(+)
create mode 100644 platform/linux-generic/pktio/mdev/cxgb4.c
diff --git a/platform/linux-generic/Makefile.am
b/platform/linux-generic/Makefile.am
index 42223199f..46f708258 100644
--- a/platform/linux-generic/Makefile.am
+++ b/platform/linux-generic/Makefile.am
@@ -251,6 +251,7 @@ __LIB__libodp_linux_la_SOURCES = \
pktio/ipc.c \
pktio/loopback.c \
pktio/mdev.c \
+ pktio/mdev/cxgb4.c \
pktio/netmap.c \
pktio/ring.c \
pktio/socket.c \
diff --git a/platform/linux-generic/pktio/mdev/cxgb4.c
b/platform/linux-generic/pktio/mdev/cxgb4.c
new file mode 100644
index 000000000..db1bfa76c
--- /dev/null
+++ b/platform/linux-generic/pktio/mdev/cxgb4.c
@@ -0,0 +1,887 @@
+/*Copyright (c) 2018, Linaro Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "config.h"
+
+#ifdef ODP_MDEV
+
+#include <linux/types.h>
+#include <protocols/eth.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include <odp_packet_io_internal.h>
+#include <odp_posix_extensions.h>
+
+#include <odp/api/hints.h>
+#include <odp/api/packet.h>
+#include <odp/api/plat/packet_inlines.h>
+#include <odp/drv/hints.h>
+#include <odp/drv/mmio.h>
+
+#include <pktio/common.h>
+#include <pktio/ethtool.h>
+#include <pktio/mdev.h>
+#include <pktio/sysfs.h>
+#include <pktio/uapi_net_mdev.h>
+
+#define MODULE_NAME "cxgb4"
+
+#define CXGB4_TX_BUF_SIZE 2048U
+
+#define CXGB4_TX_INLINE_MAX (256 - sizeof(cxgb4_fw_eth_tx_pkt_wr_t) \
+ - sizeof(cxgb4_cpl_tx_pkt_core_t))
+
+/* RX queue definitions */
+#define CXGB4_RX_QUEUE_NUM_MAX 32
+
+/** RX descriptor */
+typedef struct {
+ uint32_t padding[12];
+
+ odp_u32be_t hdrbuflen_pidx;
+#define RX_DESC_NEW_BUF_FLAG (1U << 31)
+ odp_u32be_t pldbuflen_qid;
+ union {
+#define RX_DESC_GEN_SHIFT 7
+#define RX_DESC_GEN_MASK 0x1
+#define RX_DESC_TYPE_SHIFT 4
+#define RX_DESC_TYPE_MASK 0x3
+#define RX_DESC_TYPE_FLBUF_X 0
+#define RX_DESC_TYPE_CPL_X 1
+#define RX_DESC_TYPE_INTR_X 2
+ uint8_t type_gen;
+#define RX_DESC_TIMESTAMP_MASK 0xfffffffffffffffULL
+ odp_u64be_t last_flit;
+ };
+} cxgb4_rx_desc_t;
+
+#define RX_DESC_TO_GEN(rxd) \
+ (((rxd)->type_gen >> RX_DESC_GEN_SHIFT) & RX_DESC_GEN_MASK)
+#define RX_DESC_TO_TYPE(rxd) \
+ (((rxd)->type_gen >> RX_DESC_TYPE_SHIFT) & RX_DESC_TYPE_MASK)
+
+/** RX queue data */
+typedef struct ODP_ALIGNED_CACHE {
+ cxgb4_rx_desc_t *rx_descs; /**< RX queue base */
+
+ odp_u32le_t *doorbell_fl; /**< Free list refill doorbell */
+ odp_u32le_t *doorbell_desc; /**< Rx descriptor free doorbell */
+ uint32_t doorbell_fl_key; /**< 'Key' to the doorbell */
+ uint32_t doorbell_desc_key; /**< 'Key' to the doorbell */
+
+ uint16_t rx_queue_len; /**< Number of RX desc entries */
+ uint16_t rx_next; /**< Next RX desc to handle */
+
+ uint32_t gen:1; /**< RX queue generation */
+
+ odp_u64be_t *free_list; /**< Free list base */
+
+ uint8_t free_list_len; /**< Number of free list entries */
+ uint8_t commit_pending; /**< Free list entries pending commit */
+
+ uint8_t cidx; /**< Free list consumer index */
+ uint8_t pidx; /**< Free list producer index */
+
+ uint32_t offset; /**< Offset into last free fragment */
+
+ mdev_dma_area_t rx_data; /**< RX packet payload area */
+
+ odp_ticketlock_t lock; /**< RX queue lock */
+} cxgb4_rx_queue_t;
+
+/* TX queue definitions */
+#define CXGB4_TX_QUEUE_NUM_MAX 32
+
+typedef struct {
+ odp_u64be_t data[8];
+} cxgb4_tx_desc_t;
+
+typedef struct {
+#define CXGB4_FW_ETH_TX_PKT_WR 0x08000000UL
+ odp_u32be_t op_immdlen;
+ odp_u32be_t equiq_to_len16;
+ odp_u64be_t r3;
+} cxgb4_fw_eth_tx_pkt_wr_t;
+
+typedef struct {
+#define CPL_TX_PKT_XT 0xEE000000UL
+#define TXPKT_PF_S 8
+#define TXPKT_PF_V(x) ((x) << TXPKT_PF_S)
+#define TXPKT_INTF_S 16
+#define TXPKT_INTF_V(x) ((x) << TXPKT_INTF_S)
+ odp_u32be_t ctrl0;
+ odp_u16be_t pack;
+ odp_u16be_t len;
+#define TXPKT_IPCSUM_DIS_F (1UL << 62)
+#define TXPKT_L4CSUM_DIS_F (1UL << 63)
+ odp_u64be_t ctrl1;
+} cxgb4_cpl_tx_pkt_core_t;
+
+typedef struct {
+ odp_u32be_t len[2];
+ odp_u64be_t addr[2];
+} cxgb4_sg_pair_t;
+
+typedef struct {
+#define CXGB4_ULP_TX_SC_DSGL (0x82UL << 24)
+ odp_u32be_t sg_pairs_num;
+ odp_u32be_t len0;
+ odp_u64be_t addr0;
+ cxgb4_sg_pair_t sg_pairs[0];
+} cxgb4_sg_list_t;
+
+typedef struct {
+ odp_u32be_t qid;
+ odp_u16be_t cidx;
+ odp_u16be_t pidx;
+} cxgb4_tx_queue_stats;
+
+/** TX queue data */
+typedef struct ODP_ALIGNED_CACHE {
+ cxgb4_tx_desc_t *tx_descs; /**< TX queue base */
+ cxgb4_tx_queue_stats *stats; /**< TX queue stats */
+
+ odp_u32le_t *doorbell_desc; /**< TX queue doorbell */
+ uint32_t doorbell_desc_key; /**< 'Key' to the doorbell */
+
+ uint16_t tx_queue_len; /**< Number of TX desc entries */
+ uint16_t tx_next; /**< Next TX desc to insert */
+
+ mdev_dma_area_t tx_data; /**< TX packet payload area */
+
+ odp_ticketlock_t lock; /**< TX queue lock */
+} cxgb4_tx_queue_t;
+
+/** Packet socket using mediated cxgb4 device */
+typedef struct {
+ /** RX queue hot data */
+ cxgb4_rx_queue_t rx_queues[CXGB4_RX_QUEUE_NUM_MAX];
+
+ /** TX queue hot data */
+ cxgb4_tx_queue_t tx_queues[CXGB4_TX_QUEUE_NUM_MAX];
+
+ odp_pool_t pool; /**< pool to alloc packets from */
+
+ odp_bool_t lockless_rx; /**< no locking for RX */
+ uint16_t free_list_align; /**< Alignment required for RX chunks */
+
+ odp_bool_t lockless_tx; /**< no locking for TX */
+ uint8_t tx_channel; /**< TX channel of the interface */
+ uint8_t phys_function; /**< Physical function of the interface
*/
+
+ odp_pktio_capability_t capa; /**< interface capabilities */
+
+ uint8_t *mmio; /**< MMIO region */
+
+ int sockfd; /**< control socket */
+
+ mdev_device_t mdev; /**< Common mdev data */
+} pktio_ops_cxgb4_data_t;
+
+static void cxgb4_rx_refill(cxgb4_rx_queue_t *rxq, uint8_t num);
+static void cxgb4_wait_link_up(pktio_entry_t *pktio_entry);
+static int cxgb4_close(pktio_entry_t *pktio_entry);
+
+static int cxgb4_mmio_register(pktio_ops_cxgb4_data_t *pkt_cxgb4,
+ uint64_t offset, uint64_t size)
+{
+ ODP_ASSERT(pkt_cxgb4->mmio == NULL);
+
+ pkt_cxgb4->mmio = mdev_region_mmap(&pkt_cxgb4->mdev, offset, size);
+ if (pkt_cxgb4->mmio == MAP_FAILED) {
+ ODP_ERR("Cannot mmap MMIO\n");
+ return -1;
+ }
+
+ ODP_DBG("Register MMIO region: 0x%llx@%016llx\n", size, offset);
+
+ return 0;
+}
+
+static int cxgb4_rx_queue_register(pktio_ops_cxgb4_data_t *pkt_cxgb4,
+ uint64_t offset, uint64_t size,
+ uint64_t free_list_offset)
+{
+ uint16_t rxq_idx = pkt_cxgb4->capa.max_input_queues++;
+ cxgb4_rx_queue_t *rxq = &pkt_cxgb4->rx_queues[rxq_idx];
+ struct ethtool_ringparam ering;
+ uint64_t val;
+ int ret;
+
+ ODP_ASSERT(rxq_idx < ARRAY_SIZE(pkt_cxgb4->rx_queues));
+
+ odp_ticketlock_init(&rxq->lock);
+
+ ret = ethtool_ringparam_get_fd(pkt_cxgb4->sockfd,
+ pkt_cxgb4->mdev.if_name, &ering);
+ if (ret) {
+ ODP_ERR("Cannot get queue length\n");
+ return -1;
+ }
+ rxq->rx_queue_len = ering.rx_mini_pending;
+ rxq->free_list_len = ering.rx_pending + 8;
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/queues/rx-%u/cxgb4/"
+ "doorbell_fl_offset",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ if (ret) {
+ ODP_ERR("Cannot get %s rx-%u doorbell_fl_offset\n",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ return -1;
+ }
+ rxq->doorbell_fl = (odp_u32le_t *)(void *)(pkt_cxgb4->mmio + val);
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/queues/rx-%u/cxgb4/"
+ "doorbell_fl_key",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ if (ret) {
+ ODP_ERR("Cannot get %s rx-%u doorbell_fl_key\n",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ return -1;
+ }
+ rxq->doorbell_fl_key = val;
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/queues/rx-%u/cxgb4/"
+ "doorbell_desc_offset",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ if (ret) {
+ ODP_ERR("Cannot get %s rx-%u doorbell_desc_offset\n",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ return -1;
+ }
+ rxq->doorbell_desc = (odp_u32le_t *)(void *)(pkt_cxgb4->mmio + val);
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/queues/rx-%u/cxgb4/"
+ "doorbell_desc_key",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ if (ret) {
+ ODP_ERR("Cannot get %s rx-%u doorbell_desc_key\n",
+ pkt_cxgb4->mdev.if_name, rxq_idx);
+ return -1;
+ }
+ rxq->doorbell_desc_key = val;
+
+ ODP_ASSERT(rxq->rx_queue_len * sizeof(*rxq->rx_descs) <= size);
+
+ rxq->rx_descs = mdev_region_mmap(&pkt_cxgb4->mdev, offset, size);
+ if (rxq->rx_descs == MAP_FAILED) {
+ ODP_ERR("Cannot mmap RX queue\n");
+ return -1;
+ }
+
+ ODP_ASSERT(rxq->free_list_len * sizeof(*rxq->free_list) <=
+ ODP_PAGE_SIZE);
+
+ rxq->free_list =
+ mdev_region_mmap(&pkt_cxgb4->mdev, free_list_offset, ODP_PAGE_SIZE);
+ if (rxq->free_list == MAP_FAILED) {
+ ODP_ERR("Cannot mmap RX queue free list\n");
+ return -1;
+ }
+
+ rxq->rx_data.size = rxq->free_list_len * ODP_PAGE_SIZE;
+ ret = mdev_dma_area_alloc(&pkt_cxgb4->mdev, &rxq->rx_data);
+ if (ret) {
+ ODP_ERR("Cannot allocate RX queue DMA area\n");
+ return -1;
+ }
+
+ rxq->gen = 1;
+
+ /*
+ * Leave 1 HW block (8 entries) unpopulated,
+ * otherwise HW will think the free list is empty.
+ */
+ cxgb4_rx_refill(rxq, rxq->free_list_len - 8);
+ rxq->cidx = rxq->free_list_len - 1;
+
+ ODP_DBG("Register RX queue region: 0x%llx@%016llx\n", size, offset);
+ ODP_DBG(" RX descriptors: %u\n", rxq->rx_queue_len);
+ ODP_DBG(" RX free list entries: %u\n", rxq->free_list_len);
+
+ return 0;
+}
+
+static int cxgb4_tx_queue_register(pktio_ops_cxgb4_data_t *pkt_cxgb4,
+ uint64_t offset, uint64_t size)
+{
+ uint16_t txq_idx = pkt_cxgb4->capa.max_output_queues++;
+ cxgb4_tx_queue_t *txq = &pkt_cxgb4->tx_queues[txq_idx];
+ struct ethtool_ringparam ering;
+ uint64_t val;
+ int ret;
+
+ ODP_ASSERT(txq_idx < ARRAY_SIZE(pkt_cxgb4->tx_queues));
+
+ odp_ticketlock_init(&txq->lock);
+
+ ret = ethtool_ringparam_get_fd(pkt_cxgb4->sockfd,
+ pkt_cxgb4->mdev.if_name, &ering);
+ if (ret) {
+ ODP_ERR("Cannot get queue length\n");
+ return -1;
+ }
+ txq->tx_queue_len = ering.tx_pending;
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/queues/tx-%u/cxgb4/"
+ "doorbell_desc_offset",
+ pkt_cxgb4->mdev.if_name, txq_idx);
+ if (ret) {
+ ODP_ERR("Cannot get %s tx-%u doorbell_desc_offset\n",
+ pkt_cxgb4->mdev.if_name, txq_idx);
+ return -1;
+ }
+ txq->doorbell_desc = (odp_u32le_t *)(void *)(pkt_cxgb4->mmio + val);
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/queues/tx-%u/cxgb4/"
+ "doorbell_desc_key",
+ pkt_cxgb4->mdev.if_name, txq_idx);
+ if (ret) {
+ ODP_ERR("Cannot get %s tx-%u doorbell_desc_key\n",
+ pkt_cxgb4->mdev.if_name, txq_idx);
+ return -1;
+ }
+ txq->doorbell_desc_key = val;
+
+ ODP_ASSERT(txq->tx_queue_len * sizeof(*txq->tx_descs) +
+ sizeof(*txq->stats) <= size);
+
+ txq->tx_descs = mdev_region_mmap(&pkt_cxgb4->mdev, offset, size);
+ if (txq->tx_descs == MAP_FAILED) {
+ ODP_ERR("Cannot mmap TX queue\n");
+ return -1;
+ }
+
+ txq->stats =
+ (cxgb4_tx_queue_stats *)(txq->tx_descs + txq->tx_queue_len);
+
+ txq->tx_data.size = txq->tx_queue_len * CXGB4_TX_BUF_SIZE;
+ ret = mdev_dma_area_alloc(&pkt_cxgb4->mdev, &txq->tx_data);
+ if (ret) {
+ ODP_ERR("Cannot allocate TX queue DMA area\n");
+ return -1;
+ }
+
+ ODP_DBG("Register TX queue region: 0x%llx@%016llx\n", size, offset);
+ ODP_DBG(" TX descriptors: %u\n", txq->tx_queue_len);
+
+ return 0;
+}
+
+static int cxgb4_region_info_cb(mdev_device_t *mdev,
+ struct vfio_region_info *region_info)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 =
+ odp_container_of(mdev, pktio_ops_cxgb4_data_t, mdev);
+ mdev_region_class_t class_info;
+ struct vfio_region_info_cap_sparse_mmap *sparse;
+
+ if (vfio_get_region_cap_type(region_info, &class_info) < 0) {
+ ODP_ERR("Cannot find class_info in region %u\n",
+ region_info->index);
+ return -1;
+ }
+
+ switch (class_info.type) {
+ case VFIO_NET_MDEV_MMIO:
+ return cxgb4_mmio_register(pkt_cxgb4,
+ region_info->offset,
+ region_info->size);
+
+ case VFIO_NET_MDEV_RX_RING:
+ if (vfio_get_region_sparse_mmaps(region_info, &sparse) < 0) {
+ ODP_ERR("RX queue in region %u: %s\n",
+ region_info->index,
+ "no areas found");
+ return -1;
+ }
+
+ if (sparse->nr_areas != 2) {
+ ODP_ERR("RX queue in region %u: %s\n",
+ region_info->index,
+ "wrong number of areas");
+ return -1;
+ }
+
+ ODP_ASSERT(sparse->areas[1].size == ODP_PAGE_SIZE);
+
+ return cxgb4_rx_queue_register(pkt_cxgb4,
+ sparse->areas[0].offset,
+ sparse->areas[0].size,
+ sparse->areas[1].offset);
+
+ case VFIO_NET_MDEV_TX_RING:
+ return cxgb4_tx_queue_register(pkt_cxgb4,
+ region_info->offset,
+ region_info->size);
+
+ default:
+ ODP_ERR("Unexpected region %u (class %u:%u)\n",
+ region_info->index, class_info.type,
+ class_info.subtype);
+ return -1;
+ }
+}
+
+static int cxgb4_open(odp_pktio_t id ODP_UNUSED,
+ pktio_entry_t *pktio_entry,
+ const char *resource, odp_pool_t pool)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4;
+ uint64_t val;
+ int ret;
+
+ ODP_ASSERT(pool != ODP_POOL_INVALID);
+
+ if (strncmp(resource, NET_MDEV_PREFIX, strlen(NET_MDEV_PREFIX)))
+ return -1;
+
+ ODP_DBG("%s: probing resource %s\n", MODULE_NAME, resource);
+
+ pkt_cxgb4 = ODP_OPS_DATA_ALLOC(sizeof(*pkt_cxgb4));
+ if (odp_unlikely(pkt_cxgb4 == NULL)) {
+ ODP_ERR("Failed to allocate pktio_ops_cxgb4_data_t struct");
+ return -1;
+ }
+ pktio_entry->s.ops_data = pkt_cxgb4;
+
+ memset(pkt_cxgb4, 0, sizeof(*pkt_cxgb4));
+
+ pkt_cxgb4->sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (pkt_cxgb4->sockfd == -1) {
+ ODP_ERR("Cannot get device control socket\n");
+ goto out;
+ }
+
+ ret =
+ mdev_device_create(&pkt_cxgb4->mdev, MODULE_NAME,
+ resource + strlen(NET_MDEV_PREFIX),
+ cxgb4_region_info_cb);
+ if (ret)
+ goto out;
+
+ pkt_cxgb4->pool = pool;
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/tx_channel",
+ pkt_cxgb4->mdev.if_name);
+ if (ret) {
+ ODP_ERR("Cannot get %s tx_channel\n", pkt_cxgb4->mdev.if_name);
+ return -1;
+ }
+ pkt_cxgb4->tx_channel = val;
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/phys_function",
+ pkt_cxgb4->mdev.if_name);
+ if (ret) {
+ ODP_ERR("Cannot get %s phys_function\n",
+ pkt_cxgb4->mdev.if_name);
+ return -1;
+ }
+ pkt_cxgb4->phys_function = val;
+
+ ret = sysfs_attr_u64_get(&val, "/sys/class/net/%s/free_list_align",
+ pkt_cxgb4->mdev.if_name);
+ if (ret) {
+ ODP_ERR("Cannot get %s free_list_align\n",
+ pkt_cxgb4->mdev.if_name);
+ return -1;
+ }
+ pkt_cxgb4->free_list_align = val;
+
+ cxgb4_wait_link_up(pktio_entry);
+
+ ODP_DBG("%s: open %s is successful\n", MODULE_NAME,
+ pkt_cxgb4->mdev.if_name);
+
+ return 0;
+
+out:
+ cxgb4_close(pktio_entry);
+ return -1;
+}
+
+static int cxgb4_close(pktio_entry_t *pktio_entry)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+
+ ODP_DBG("%s: close %s\n", MODULE_NAME, pkt_cxgb4->mdev.if_name);
+
+ mdev_device_destroy(&pkt_cxgb4->mdev);
+
+ for (uint16_t i = 0; i < pkt_cxgb4->capa.max_input_queues; i++) {
+ cxgb4_rx_queue_t *rxq = &pkt_cxgb4->rx_queues[i];
+
+ if (rxq->rx_data.size)
+ mdev_dma_area_free(&pkt_cxgb4->mdev, &rxq->rx_data);
+ }
+
+ for (uint16_t i = 0; i < pkt_cxgb4->capa.max_output_queues; i++) {
+ cxgb4_tx_queue_t *txq = &pkt_cxgb4->tx_queues[i];
+
+ if (txq->tx_data.size)
+ mdev_dma_area_free(&pkt_cxgb4->mdev, &txq->tx_data);
+ }
+
+ if (pkt_cxgb4->sockfd != -1)
+ close(pkt_cxgb4->sockfd);
+
+ ODP_OPS_DATA_FREE(pkt_cxgb4);
+
+ return 0;
+}
+
+static void cxgb4_rx_refill(cxgb4_rx_queue_t *rxq, uint8_t num)
+{
+ rxq->commit_pending += num;
+
+ while (num) {
+ uint64_t iova = rxq->rx_data.iova + rxq->pidx * ODP_PAGE_SIZE;
+
+ rxq->free_list[rxq->pidx] = odp_cpu_to_be_64(iova);
+
+ rxq->pidx++;
+ if (odp_unlikely(rxq->pidx >= rxq->free_list_len))
+ rxq->pidx = 0;
+
+ num--;
+ }
+
+ /* We commit free list entries to HW in packs of 8 */
+ if (rxq->commit_pending >= 8) {
+ uint32_t val = rxq->doorbell_fl_key | (rxq->commit_pending / 8);
+
+ /* Ring the doorbell */
+ odpdrv_mmio_u32le_write(val, rxq->doorbell_fl);
+
+ rxq->commit_pending &= 7;
+ }
+}
+
+static int cxgb4_recv(pktio_entry_t *pktio_entry,
+ int rxq_idx, odp_packet_t pkt_table[], int num)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+ cxgb4_rx_queue_t *rxq = &pkt_cxgb4->rx_queues[rxq_idx];
+ uint16_t refill_count = 0;
+ int rx_pkts = 0;
+
+ if (!pkt_cxgb4->lockless_rx)
+ odp_ticketlock_lock(&rxq->lock);
+
+ while (rx_pkts < num) {
+ volatile cxgb4_rx_desc_t *rxd = &rxq->rx_descs[rxq->rx_next];
+ odp_packet_t pkt;
+ uint32_t pkt_len;
+ uint8_t type;
+
+ if (RX_DESC_TO_GEN(rxd) != rxq->gen)
+ break;
+
+ type = RX_DESC_TO_TYPE(rxd);
+
+ if (odp_unlikely(type != RX_DESC_TYPE_FLBUF_X)) {
+ ODP_ERR("Invalid rxd type %u\n", type);
+
+ rxq->rx_next++;
+ if (odp_unlikely(rxq->rx_next >= rxq->rx_queue_len)) {
+ rxq->rx_next = 0;
+ rxq->gen ^= 1;
+ }
+
+ continue;
+ }
+
+ pkt_len = odp_be_to_cpu_32(rxd->pldbuflen_qid);
+
+ /*
+ * HW skips trailing area in current RX buffer and starts in the
+ * next one from the beginning.
+ */
+ if (pkt_len & RX_DESC_NEW_BUF_FLAG) {
+ rxq->cidx++;
+ if (odp_unlikely(rxq->cidx >= rxq->free_list_len))
+ rxq->cidx = 0;
+
+ rxq->offset = 0;
+ refill_count++;
+
+ pkt_len ^= RX_DESC_NEW_BUF_FLAG;
+ }
+
+ if (odp_unlikely(rxq->offset + pkt_len > ODP_PAGE_SIZE)) {
+ /* TODO: reset the HW and reinit ? */
+ ODP_ABORT("Packet write beyond buffer boundary\n");
+ }
+
+ pkt = odp_packet_alloc(pkt_cxgb4->pool, pkt_len);
+ if (odp_likely(pkt != ODP_PACKET_INVALID)) {
+ odp_packet_hdr_t *pkt_hdr;
+
+ /*
+ * NIC is aligning L2 header on 4-byte boundary, hence
+ * we need to strip 2 leading bytes.
+ */
+ odp_packet_copy_from_mem(pkt, 0, pkt_len - 2,
+ (uint8_t *)rxq->rx_data.vaddr +
+ rxq->cidx * ODP_PAGE_SIZE +
+ rxq->offset + 2);
+
+ pkt_hdr = odp_packet_hdr(pkt);
+ pkt_hdr->input = pktio_entry->s.handle;
+
+ pkt_table[rx_pkts] = pkt;
+ rx_pkts++;
+ }
+
+ rxq->offset +=
+ ROUNDUP_ALIGN(pkt_len, pkt_cxgb4->free_list_align);
+
+ rxq->rx_next++;
+ if (odp_unlikely(rxq->rx_next >= rxq->rx_queue_len)) {
+ rxq->rx_next = 0;
+ rxq->gen ^= 1;
+ }
+ }
+
+ if (rx_pkts)
+ odpdrv_mmio_u32le_write(rx_pkts | rxq->doorbell_desc_key,
+ rxq->doorbell_desc);
+
+ if (refill_count)
+ cxgb4_rx_refill(rxq, refill_count);
+
+ if (!pkt_cxgb4->lockless_rx)
+ odp_ticketlock_unlock(&rxq->lock);
+
+ return rx_pkts;
+}
+
+static int cxgb4_send(pktio_entry_t *pktio_entry,
+ int txq_idx, const odp_packet_t pkt_table[], int num)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+ cxgb4_tx_queue_t *txq = &pkt_cxgb4->tx_queues[txq_idx];
+ uint16_t budget, tx_txds = 0;
+ int tx_pkts = 0;
+
+ if (!pkt_cxgb4->lockless_tx)
+ odp_ticketlock_lock(&txq->lock);
+
+ /* Determine how many packets will fit in TX queue */
+ budget = txq->tx_queue_len - 1;
+ budget -= txq->tx_next;
+ budget += odp_be_to_cpu_16(txq->stats->cidx);
+ budget &= txq->tx_queue_len - 1;
+
+ while (tx_txds < budget && tx_pkts < num) {
+ uint16_t pkt_len = _odp_packet_len(pkt_table[tx_pkts]);
+
+ cxgb4_tx_desc_t *txd = &txq->tx_descs[txq->tx_next];
+ uint32_t txd_len;
+
+ cxgb4_fw_eth_tx_pkt_wr_t *wr;
+ cxgb4_cpl_tx_pkt_core_t *cpl;
+ uint32_t op_immdlen;
+
+ /* Skip oversized packets silently */
+ if (odp_unlikely(pkt_len > CXGB4_TX_BUF_SIZE)) {
+ tx_pkts++;
+ continue;
+ }
+
+ wr = (cxgb4_fw_eth_tx_pkt_wr_t *)txd;
+ cpl = (cxgb4_cpl_tx_pkt_core_t *)(wr + 1);
+
+ txd_len = sizeof(*wr) + sizeof(*cpl);
+ op_immdlen = CXGB4_FW_ETH_TX_PKT_WR | sizeof(*cpl);
+
+ if (pkt_len <= CXGB4_TX_INLINE_MAX) {
+ uint8_t *pos;
+ uint32_t left;
+
+ txd_len += pkt_len;
+
+ /* Try next time */
+ if (tx_txds + DIV_ROUND_UP(txd_len, sizeof(*txd)) >
+ budget)
+ break;
+
+ op_immdlen += pkt_len;
+
+ /* Packet copying shall take care of wrapping */
+ pos = (uint8_t *)(cpl + 1);
+ left = (uint8_t *)(txq->tx_descs + txq->tx_queue_len) -
+ pos;
+
+ if (odp_likely(left >= pkt_len)) {
+ odp_packet_copy_to_mem(pkt_table[tx_pkts], 0,
+ pkt_len, pos);
+ } else {
+ odp_packet_copy_to_mem(pkt_table[tx_pkts], 0,
+ left, pos);
+ odp_packet_copy_to_mem(pkt_table[tx_pkts], left,
+ pkt_len - left,
+ &txq->tx_descs[0]);
+ }
+ } else {
+ uint32_t offset = txq->tx_next * CXGB4_TX_BUF_SIZE;
+ cxgb4_sg_list_t *sgl;
+
+ txd_len += sizeof(*sgl);
+
+ odp_packet_copy_to_mem(pkt_table[tx_pkts], 0, pkt_len,
+ (uint8_t *)txq->tx_data.vaddr +
+ offset);
+
+ sgl = (cxgb4_sg_list_t *)(cpl + 1);
+
+ sgl->sg_pairs_num =
+ odp_cpu_to_be_32(CXGB4_ULP_TX_SC_DSGL | 1);
+ sgl->addr0 =
+ odp_cpu_to_be_64(txq->tx_data.iova + offset);
+ sgl->len0 = odp_cpu_to_be_32(pkt_len);
+ }
+
+ wr->op_immdlen = odp_cpu_to_be_32(op_immdlen);
+ wr->equiq_to_len16 =
+ odp_cpu_to_be_32(DIV_ROUND_UP(txd_len, 16));
+ wr->r3 = odp_cpu_to_be_64(0);
+
+ cpl->ctrl0 =
+ odp_cpu_to_be_32(CPL_TX_PKT_XT |
+ TXPKT_INTF_V(pkt_cxgb4->tx_channel) |
+ TXPKT_PF_V(pkt_cxgb4->phys_function));
+ cpl->pack = odp_cpu_to_be_16(0);
+ cpl->len = odp_cpu_to_be_16(pkt_len);
+ cpl->ctrl1 =
+ odp_cpu_to_be_64(TXPKT_L4CSUM_DIS_F | TXPKT_IPCSUM_DIS_F);
+
+ txq->tx_next += DIV_ROUND_UP(txd_len, sizeof(*txd));
+ if (odp_unlikely(txq->tx_next >= txq->tx_queue_len))
+ txq->tx_next -= txq->tx_queue_len;
+
+ tx_txds += DIV_ROUND_UP(txd_len, sizeof(*txd));
+ tx_pkts++;
+ }
+
+ /* Ring the doorbell */
+ odpdrv_mmio_u32le_write(txq->doorbell_desc_key | tx_txds,
+ txq->doorbell_desc);
+
+ if (!pkt_cxgb4->lockless_tx)
+ odp_ticketlock_unlock(&txq->lock);
+
+ odp_packet_free_multi(pkt_table, tx_pkts);
+
+ return tx_pkts;
+}
+
+static int cxgb4_link_status(pktio_entry_t *pktio_entry)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+
+ return link_status_fd(pkt_cxgb4->sockfd, pkt_cxgb4->mdev.if_name);
+}
+
+static void cxgb4_wait_link_up(pktio_entry_t *pktio_entry)
+{
+ while (!cxgb4_link_status(pktio_entry))
+ sleep(1);
+}
+
+static int cxgb4_capability(pktio_entry_t *pktio_entry,
+ odp_pktio_capability_t *capa)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+
+ *capa = pkt_cxgb4->capa;
+ return 0;
+}
+
+static int cxgb4_input_queues_config(pktio_entry_t *pktio_entry,
+ const odp_pktin_queue_param_t *p)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+
+ if (p->op_mode == ODP_PKTIO_OP_MT_UNSAFE)
+ pkt_cxgb4->lockless_rx = 1;
+ else
+ pkt_cxgb4->lockless_rx = 0;
+
+ return 0;
+}
+
+static int cxgb4_output_queues_config(pktio_entry_t *pktio_entry,
+ const odp_pktout_queue_param_t *p)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+
+ if (p->op_mode == ODP_PKTIO_OP_MT_UNSAFE)
+ pkt_cxgb4->lockless_tx = 1;
+ else
+ pkt_cxgb4->lockless_tx = 0;
+
+ return 0;
+}
+
+static int cxgb4_mac_get(pktio_entry_t *pktio_entry, void *mac_addr)
+{
+ pktio_ops_cxgb4_data_t *pkt_cxgb4 = pktio_entry->s.ops_data;
+
+ if (mac_addr_get_fd(pkt_cxgb4->sockfd, pkt_cxgb4->mdev.if_name,
+ mac_addr) < 0)
+ return -1;
+
+ return ETH_ALEN;
+}
+
+static int cxgb4_init_global(void)
+{
+ ODP_PRINT("PKTIO: initialized " MODULE_NAME " interface\n");
+ return 0;
+}
+
+static pktio_ops_module_t cxgb4_pktio_ops = {
+ .base = {
+ .name = MODULE_NAME,
+ .init_global = cxgb4_init_global,
+ },
+
+ .open = cxgb4_open,
+ .close = cxgb4_close,
+
+ .recv = cxgb4_recv,
+ .send = cxgb4_send,
+
+ .link_status = cxgb4_link_status,
+
+ .capability = cxgb4_capability,
+
+ .mac_get = cxgb4_mac_get,
+
+ .input_queues_config = cxgb4_input_queues_config,
+ .output_queues_config = cxgb4_output_queues_config,
+};
+
+/** cxgb4 module entry point */
+ODP_MODULE_CONSTRUCTOR(cxgb4_module_init)
+{
+ odp_module_constructor(&cxgb4_pktio_ops);
+
+ odp_subsystem_register_module(pktio_ops, &cxgb4_pktio_ops);
+}
+
+/*
+ * Temporary variable to enable link this module,
+ * will remove in Makefile scheme changes.
+ */
+int enable_link_cxgb4_pktio_ops;
+
+#endif /* ODP_MDEV */
diff --git a/platform/linux-generic/pktio/subsystem.c
b/platform/linux-generic/pktio/subsystem.c
index a3b36c144..80134c016 100644
--- a/platform/linux-generic/pktio/subsystem.c
+++ b/platform/linux-generic/pktio/subsystem.c
@@ -44,6 +44,9 @@ extern int enable_link_socket_mmap_pktio_ops;
#ifdef ODP_PKTIO_TAP
extern int enable_link_tap_pktio_ops;
#endif
+#ifdef ODP_MDEV
+extern int enable_link_cxgb4_pktio_ops;
+#endif
ODP_SUBSYSTEM_CONSTRUCTOR(pktio_ops)
{
@@ -73,4 +76,7 @@ ODP_SUBSYSTEM_CONSTRUCTOR(pktio_ops)
#ifdef ODP_PKTIO_TAP
enable_link_tap_pktio_ops = 1;
#endif
+#ifdef ODP_MDEV
+ enable_link_cxgb4_pktio_ops = 1;
+#endif
}
