/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2012 6WIND S.A.
- * Copyright 2012 Mellanox
+ * Copyright 2012 Mellanox Technologies, Ltd
*/
/**
#include "mlx4.h"
#include "mlx4_glue.h"
#include "mlx4_flow.h"
+#include "mlx4_mr.h"
#include "mlx4_rxtx.h"
#include "mlx4_utils.h"
+struct mlx4_dev_list mlx4_mem_event_cb_list =
+ LIST_HEAD_INITIALIZER(mlx4_mem_event_cb_list);
+
+rte_rwlock_t mlx4_mem_event_rwlock = RTE_RWLOCK_INITIALIZER;
+
/** Configuration structure for device arguments. */
struct mlx4_conf {
struct {
NULL,
};
+static void mlx4_dev_stop(struct rte_eth_dev *dev);
+
/**
* DPDK callback for Ethernet device configuration.
*
(void *)dev, strerror(-ret));
goto err;
}
+#ifndef NDEBUG
+ mlx4_mr_dump_dev(dev);
+#endif
ret = mlx4_rxq_intr_enable(priv);
if (ret) {
ERROR("%p: interrupt handler installation failed",
dev->rx_pkt_burst = mlx4_rx_burst;
return 0;
err:
- /* Rollback. */
- priv->started = 0;
+ mlx4_dev_stop(dev);
return ret;
}
dev->tx_pkt_burst = mlx4_tx_burst_removed;
rte_wmb();
mlx4_flow_clean(priv);
+ mlx4_rss_deinit(priv);
for (i = 0; i != dev->data->nb_rx_queues; ++i)
mlx4_rx_queue_release(dev->data->rx_queues[i]);
for (i = 0; i != dev->data->nb_tx_queues; ++i)
mlx4_tx_queue_release(dev->data->tx_queues[i]);
+ mlx4_mr_release(dev);
if (priv->pd != NULL) {
assert(priv->ctx != NULL);
claim_zero(mlx4_glue->dealloc_pd(priv->pd));
return ret;
}
+/**
+ * Interpret RSS capabilities reported by device.
+ *
+ * This function returns the set of usable Verbs RSS hash fields, kernel
+ * quirks taken into account.
+ *
+ * @param ctx
+ * Verbs context.
+ * @param pd
+ * Verbs protection domain.
+ * @param device_attr_ex
+ * Extended device attributes to interpret.
+ *
+ * @return
+ * Usable RSS hash fields mask in Verbs format.
+ */
+static uint64_t
+mlx4_hw_rss_sup(struct ibv_context *ctx, struct ibv_pd *pd,
+ struct ibv_device_attr_ex *device_attr_ex)
+{
+ uint64_t hw_rss_sup = device_attr_ex->rss_caps.rx_hash_fields_mask;
+ struct ibv_cq *cq = NULL;
+ struct ibv_wq *wq = NULL;
+ struct ibv_rwq_ind_table *ind = NULL;
+ struct ibv_qp *qp = NULL;
+
+ if (!hw_rss_sup) {
+ WARN("no RSS capabilities reported; disabling support for UDP"
+ " RSS and inner VXLAN RSS");
+ return IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4 |
+ IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6 |
+ IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP;
+ }
+ if (!(hw_rss_sup & IBV_RX_HASH_INNER))
+ return hw_rss_sup;
+ /*
+ * Although reported as supported, missing code in some Linux
+ * versions (v4.15, v4.16) prevents the creation of hash QPs with
+ * inner capability.
+ *
+ * There is no choice but to attempt to instantiate a temporary RSS
+ * context in order to confirm its support.
+ */
+ cq = mlx4_glue->create_cq(ctx, 1, NULL, NULL, 0);
+ wq = cq ? mlx4_glue->create_wq
+ (ctx,
+ &(struct ibv_wq_init_attr){
+ .wq_type = IBV_WQT_RQ,
+ .max_wr = 1,
+ .max_sge = 1,
+ .pd = pd,
+ .cq = cq,
+ }) : NULL;
+ ind = wq ? mlx4_glue->create_rwq_ind_table
+ (ctx,
+ &(struct ibv_rwq_ind_table_init_attr){
+ .log_ind_tbl_size = 0,
+ .ind_tbl = &wq,
+ .comp_mask = 0,
+ }) : NULL;
+ qp = ind ? mlx4_glue->create_qp_ex
+ (ctx,
+ &(struct ibv_qp_init_attr_ex){
+ .comp_mask =
+ (IBV_QP_INIT_ATTR_PD |
+ IBV_QP_INIT_ATTR_RX_HASH |
+ IBV_QP_INIT_ATTR_IND_TABLE),
+ .qp_type = IBV_QPT_RAW_PACKET,
+ .pd = pd,
+ .rwq_ind_tbl = ind,
+ .rx_hash_conf = {
+ .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
+ .rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE,
+ .rx_hash_key = mlx4_rss_hash_key_default,
+ .rx_hash_fields_mask = hw_rss_sup,
+ },
+ }) : NULL;
+ if (!qp) {
+ WARN("disabling unusable inner RSS capability due to kernel"
+ " quirk");
+ hw_rss_sup &= ~IBV_RX_HASH_INNER;
+ } else {
+ claim_zero(mlx4_glue->destroy_qp(qp));
+ }
+ if (ind)
+ claim_zero(mlx4_glue->destroy_rwq_ind_table(ind));
+ if (wq)
+ claim_zero(mlx4_glue->destroy_wq(wq));
+ if (cq)
+ claim_zero(mlx4_glue->destroy_cq(cq));
+ return hw_rss_sup;
+}
+
static struct rte_pci_driver mlx4_driver;
/**
(device_attr.vendor_part_id ==
PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO);
DEBUG("L2 tunnel checksum offloads are %ssupported",
- (priv->hw_csum_l2tun ? "" : "not "));
- priv->hw_rss_sup = device_attr_ex.rss_caps.rx_hash_fields_mask;
- if (!priv->hw_rss_sup) {
- WARN("no RSS capabilities reported; disabling support"
- " for UDP RSS and inner VXLAN RSS");
- /* Fake support for all possible RSS hash fields. */
- priv->hw_rss_sup = ~UINT64_C(0);
- priv->hw_rss_sup = mlx4_conv_rss_hf(priv, -1);
- /* Filter out known unsupported fields. */
- priv->hw_rss_sup &=
- ~(uint64_t)(IBV_RX_HASH_SRC_PORT_UDP |
- IBV_RX_HASH_DST_PORT_UDP |
- IBV_RX_HASH_INNER);
- }
+ priv->hw_csum_l2tun ? "" : "not ");
+ priv->hw_rss_sup = mlx4_hw_rss_sup(priv->ctx, priv->pd,
+ &device_attr_ex);
DEBUG("supported RSS hash fields mask: %016" PRIx64,
priv->hw_rss_sup);
+ priv->hw_fcs_strip = !!(device_attr_ex.raw_packet_caps &
+ IBV_RAW_PACKET_CAP_SCATTER_FCS);
+ DEBUG("FCS stripping toggling is %ssupported",
+ priv->hw_fcs_strip ? "" : "not ");
/* Configure the first MAC address by default. */
if (mlx4_get_mac(priv, &mac.addr_bytes)) {
ERROR("cannot get MAC address, is mlx4_en loaded?"
/* Update link status once if waiting for LSC. */
if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
mlx4_link_update(eth_dev, 0);
+ /*
+ * Once the device is added to the list of memory event
+ * callback, its global MR cache table cannot be expanded
+ * on the fly because of deadlock. If it overflows, lookup
+ * should be done by searching MR list linearly, which is slow.
+ */
+ err = mlx4_mr_btree_init(&priv->mr.cache,
+ MLX4_MR_BTREE_CACHE_N * 2,
+ eth_dev->device->numa_node);
+ if (err) {
+ /* rte_errno is already set. */
+ goto port_error;
+ }
+ /* Add device to memory callback list. */
+ rte_rwlock_write_lock(&mlx4_mem_event_rwlock);
+ LIST_INSERT_HEAD(&mlx4_mem_event_cb_list, priv, mem_event_cb);
+ rte_rwlock_write_unlock(&mlx4_mem_event_rwlock);
+ rte_eth_dev_probing_finish(eth_dev);
continue;
port_error:
rte_free(priv);
#ifdef RTE_LIBRTE_MLX4_DLOPEN_DEPS
+/**
+ * Suffix RTE_EAL_PMD_PATH with "-glue".
+ *
+ * This function performs a sanity check on RTE_EAL_PMD_PATH before
+ * suffixing its last component.
+ *
+ * @param buf[out]
+ * Output buffer, should be large enough otherwise NULL is returned.
+ * @param size
+ * Size of @p out.
+ *
+ * @return
+ * Pointer to @p buf or @p NULL in case suffix cannot be appended.
+ */
+static char *
+mlx4_glue_path(char *buf, size_t size)
+{
+ static const char *const bad[] = { "/", ".", "..", NULL };
+ const char *path = RTE_EAL_PMD_PATH;
+ size_t len = strlen(path);
+ size_t off;
+ int i;
+
+ while (len && path[len - 1] == '/')
+ --len;
+ for (off = len; off && path[off - 1] != '/'; --off)
+ ;
+ for (i = 0; bad[i]; ++i)
+ if (!strncmp(path + off, bad[i], (int)(len - off)))
+ goto error;
+ i = snprintf(buf, size, "%.*s-glue", (int)len, path);
+ if (i == -1 || (size_t)i >= size)
+ goto error;
+ return buf;
+error:
+ ERROR("unable to append \"-glue\" to last component of"
+ " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
+ " please re-configure DPDK");
+ return NULL;
+}
+
/**
* Initialization routine for run-time dependency on rdma-core.
*/
static int
mlx4_glue_init(void)
{
+ char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
const char *path[] = {
/*
* A basic security check is necessary before trusting
*/
(geteuid() == getuid() && getegid() == getgid() ?
getenv("MLX4_GLUE_PATH") : NULL),
- RTE_EAL_PMD_PATH,
+ /*
+ * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
+ * variant, otherwise let dlopen() look up libraries on its
+ * own.
+ */
+ (*RTE_EAL_PMD_PATH ?
+ mlx4_glue_path(glue_path, sizeof(glue_path)) : ""),
};
unsigned int i = 0;
void *handle = NULL;
}
mlx4_glue->fork_init();
rte_pci_register(&mlx4_driver);
+ rte_mem_event_callback_register("MLX4_MEM_EVENT_CB",
+ mlx4_mr_mem_event_cb, NULL);
}
RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__);
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