net/sfc: set up and release Tx queues

[dpdk.git] / drivers / net / sfc / sfc_tx.c

diff --git a/drivers/net/sfc/sfc_tx.c b/drivers/net/sfc/sfc_tx.c
index 9c4d6b7..8e042f5 100644 (file)
--- a/drivers/net/sfc/sfc_tx.c
+++ b/drivers/net/sfc/sfc_tx.c
@@ -32,6 +32,165 @@
 #include "sfc_ev.h"
 #include "sfc_tx.h"
 
+static int
+sfc_tx_qcheck_conf(struct sfc_adapter *sa,
+                  const struct rte_eth_txconf *tx_conf)
+{
+       unsigned int flags = tx_conf->txq_flags;
+       int rc = 0;
+
+       if (tx_conf->tx_rs_thresh != 0) {
+               sfc_err(sa, "RS bit in transmit descriptor is not supported");
+               rc = EINVAL;
+       }
+
+       if (tx_conf->tx_free_thresh != 0) {
+               sfc_err(sa,
+                       "setting explicit TX free threshold is not supported");
+               rc = EINVAL;
+       }
+
+       if (tx_conf->tx_deferred_start != 0) {
+               sfc_err(sa, "TX queue deferred start is not supported (yet)");
+               rc = EINVAL;
+       }
+
+       if (tx_conf->tx_thresh.pthresh != 0 ||
+           tx_conf->tx_thresh.hthresh != 0 ||
+           tx_conf->tx_thresh.wthresh != 0) {
+               sfc_err(sa,
+                       "prefetch/host/writeback thresholds are not supported");
+               rc = EINVAL;
+       }
+
+       if ((flags & ETH_TXQ_FLAGS_NOVLANOFFL) == 0) {
+               sfc_err(sa, "VLAN offload is not supported");
+               rc = EINVAL;
+       }
+
+       if ((flags & ETH_TXQ_FLAGS_NOXSUMSCTP) == 0) {
+               sfc_err(sa, "SCTP offload is not supported");
+               rc = EINVAL;
+       }
+
+       /* We either perform both TCP and UDP offload, or no offload at all */
+       if (((flags & ETH_TXQ_FLAGS_NOXSUMTCP) == 0) !=
+           ((flags & ETH_TXQ_FLAGS_NOXSUMUDP) == 0)) {
+               sfc_err(sa, "TCP and UDP offloads can't be set independently");
+               rc = EINVAL;
+       }
+
+       return rc;
+}
+
+int
+sfc_tx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
+            uint16_t nb_tx_desc, unsigned int socket_id,
+            const struct rte_eth_txconf *tx_conf)
+{
+       struct sfc_txq_info *txq_info;
+       struct sfc_evq *evq;
+       struct sfc_txq *txq;
+       unsigned int evq_index = sfc_evq_index_by_txq_sw_index(sa, sw_index);
+       int rc = 0;
+
+       sfc_log_init(sa, "TxQ = %u", sw_index);
+
+       rc = sfc_tx_qcheck_conf(sa, tx_conf);
+       if (rc != 0)
+               goto fail_bad_conf;
+
+       SFC_ASSERT(sw_index < sa->txq_count);
+       txq_info = &sa->txq_info[sw_index];
+
+       SFC_ASSERT(nb_tx_desc <= sa->txq_max_entries);
+       txq_info->entries = nb_tx_desc;
+
+       rc = sfc_ev_qinit(sa, evq_index, txq_info->entries, socket_id);
+       if (rc != 0)
+               goto fail_ev_qinit;
+
+       evq = sa->evq_info[evq_index].evq;
+
+       rc = ENOMEM;
+       txq = rte_zmalloc_socket("sfc-txq", sizeof(*txq), 0, socket_id);
+       if (txq == NULL)
+               goto fail_txq_alloc;
+
+       rc = sfc_dma_alloc(sa, "txq", sw_index, EFX_TXQ_SIZE(txq_info->entries),
+                          socket_id, &txq->mem);
+       if (rc != 0)
+               goto fail_dma_alloc;
+
+       rc = ENOMEM;
+       txq->pend_desc = rte_calloc_socket("sfc-txq-pend-desc",
+                                          EFX_TXQ_LIMIT(txq_info->entries),
+                                          sizeof(efx_desc_t), 0, socket_id);
+       if (txq->pend_desc == NULL)
+               goto fail_pend_desc_alloc;
+
+       rc = ENOMEM;
+       txq->sw_ring = rte_calloc_socket("sfc-txq-desc", txq_info->entries,
+                                        sizeof(*txq->sw_ring), 0, socket_id);
+       if (txq->sw_ring == NULL)
+               goto fail_desc_alloc;
+
+       txq->state = SFC_TXQ_INITIALIZED;
+       txq->ptr_mask = txq_info->entries - 1;
+       txq->hw_index = sw_index;
+       txq->flags = tx_conf->txq_flags;
+       txq->evq = evq;
+
+       evq->txq = txq;
+
+       txq_info->txq = txq;
+
+       return 0;
+
+fail_desc_alloc:
+       rte_free(txq->pend_desc);
+
+fail_pend_desc_alloc:
+       sfc_dma_free(sa, &txq->mem);
+
+fail_dma_alloc:
+       rte_free(txq);
+
+fail_txq_alloc:
+       sfc_ev_qfini(sa, evq_index);
+
+fail_ev_qinit:
+       txq_info->entries = 0;
+
+fail_bad_conf:
+       sfc_log_init(sa, "failed (TxQ = %u, rc = %d)", sw_index, rc);
+       return rc;
+}
+
+void
+sfc_tx_qfini(struct sfc_adapter *sa, unsigned int sw_index)
+{
+       struct sfc_txq_info *txq_info;
+       struct sfc_txq *txq;
+
+       sfc_log_init(sa, "TxQ = %u", sw_index);
+
+       SFC_ASSERT(sw_index < sa->txq_count);
+       txq_info = &sa->txq_info[sw_index];
+
+       txq = txq_info->txq;
+       SFC_ASSERT(txq != NULL);
+       SFC_ASSERT(txq->state == SFC_TXQ_INITIALIZED);
+
+       txq_info->txq = NULL;
+       txq_info->entries = 0;
+
+       rte_free(txq->sw_ring);
+       rte_free(txq->pend_desc);
+       sfc_dma_free(sa, &txq->mem);
+       rte_free(txq);
+}
+
 static int
 sfc_tx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
 {
@@ -118,6 +277,14 @@ fail_check_mode:
 void
 sfc_tx_fini(struct sfc_adapter *sa)
 {
+       int sw_index;
+
+       sw_index = sa->txq_count;
+       while (--sw_index >= 0) {
+               if (sa->txq_info[sw_index].txq != NULL)
+                       sfc_tx_qfini(sa, sw_index);
+       }
+
        rte_free(sa->txq_info);
        sa->txq_info = NULL;
        sa->txq_count = 0;