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authorZbigniew Bodek <zbb@FreeBSD.org>2017-04-27 19:40:53 +0000
committerZbigniew Bodek <zbb@FreeBSD.org>2017-04-27 19:40:53 +0000
commite1593b114ffa9fede0111ea3c21665c9e5d71014 (patch)
tree8a9db2f9bebc2bdbd646b5c097d5b404ca98b274 /ena_eth_com.h
downloadsrc-e1593b114ffa9fede0111ea3c21665c9e5d71014.tar.gz
src-e1593b114ffa9fede0111ea3c21665c9e5d71014.zip
Introduce HAL for Amazon Elastic Network Adapter (ENA)vendor/ena-com/1.1.4.1
This commit adds HAL (Hardware Abstraction Layer) code for Amazon Elastic Network Adapter (ENA). Version: 1.1.4.1 Obtained from: Amazon.com, Inc.
Notes
Notes: svn path=/vendor-sys/ena-com/1.1.4.1/; revision=317516; tag=vendor/ena-com/1.1.4.1
Diffstat (limited to 'ena_eth_com.h')
-rw-r--r--ena_eth_com.h167
1 files changed, 167 insertions, 0 deletions
diff --git a/ena_eth_com.h b/ena_eth_com.h
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+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) 2015-2017 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.
+ */
+
+#ifndef ENA_ETH_COM_H_
+#define ENA_ETH_COM_H_
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+#include "ena_com.h"
+
+/* head update threshold in units of (queue size / ENA_COMP_HEAD_THRESH) */
+#define ENA_COMP_HEAD_THRESH 4
+
+struct ena_com_tx_ctx {
+ struct ena_com_tx_meta ena_meta;
+ struct ena_com_buf *ena_bufs;
+ /* For LLQ, header buffer - pushed to the device mem space */
+ void *push_header;
+
+ enum ena_eth_io_l3_proto_index l3_proto;
+ enum ena_eth_io_l4_proto_index l4_proto;
+ u16 num_bufs;
+ u16 req_id;
+ /* For regular queue, indicate the size of the header
+ * For LLQ, indicate the size of the pushed buffer
+ */
+ u16 header_len;
+
+ u8 meta_valid;
+ u8 tso_enable;
+ u8 l3_csum_enable;
+ u8 l4_csum_enable;
+ u8 l4_csum_partial;
+ u8 df; /* Don't fragment */
+};
+
+struct ena_com_rx_ctx {
+ struct ena_com_rx_buf_info *ena_bufs;
+ enum ena_eth_io_l3_proto_index l3_proto;
+ enum ena_eth_io_l4_proto_index l4_proto;
+ bool l3_csum_err;
+ bool l4_csum_err;
+ /* fragmented packet */
+ bool frag;
+ u32 hash;
+ u16 descs;
+ int max_bufs;
+};
+
+int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
+ struct ena_com_tx_ctx *ena_tx_ctx,
+ int *nb_hw_desc);
+
+int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
+ struct ena_com_io_sq *io_sq,
+ struct ena_com_rx_ctx *ena_rx_ctx);
+
+int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
+ struct ena_com_buf *ena_buf,
+ u16 req_id);
+
+int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id);
+
+static inline void ena_com_unmask_intr(struct ena_com_io_cq *io_cq,
+ struct ena_eth_io_intr_reg *intr_reg)
+{
+ ENA_REG_WRITE32(io_cq->bus, intr_reg->intr_control, io_cq->unmask_reg);
+}
+
+static inline int ena_com_sq_empty_space(struct ena_com_io_sq *io_sq)
+{
+ u16 tail, next_to_comp, cnt;
+
+ next_to_comp = io_sq->next_to_comp;
+ tail = io_sq->tail;
+ cnt = tail - next_to_comp;
+
+ return io_sq->q_depth - 1 - cnt;
+}
+
+static inline int ena_com_write_sq_doorbell(struct ena_com_io_sq *io_sq)
+{
+ u16 tail;
+
+ tail = io_sq->tail;
+
+ ena_trc_dbg("write submission queue doorbell for queue: %d tail: %d\n",
+ io_sq->qid, tail);
+
+ ENA_REG_WRITE32(io_sq->bus, tail, io_sq->db_addr);
+
+ return 0;
+}
+
+static inline int ena_com_update_dev_comp_head(struct ena_com_io_cq *io_cq)
+{
+ u16 unreported_comp, head;
+ bool need_update;
+
+ head = io_cq->head;
+ unreported_comp = head - io_cq->last_head_update;
+ need_update = unreported_comp > (io_cq->q_depth / ENA_COMP_HEAD_THRESH);
+
+ if (io_cq->cq_head_db_reg && need_update) {
+ ena_trc_dbg("Write completion queue doorbell for queue %d: head: %d\n",
+ io_cq->qid, head);
+ ENA_REG_WRITE32(io_cq->bus, head, io_cq->cq_head_db_reg);
+ io_cq->last_head_update = head;
+ }
+
+ return 0;
+}
+
+static inline void ena_com_update_numa_node(struct ena_com_io_cq *io_cq,
+ u8 numa_node)
+{
+ struct ena_eth_io_numa_node_cfg_reg numa_cfg;
+
+ if (!io_cq->numa_node_cfg_reg)
+ return;
+
+ numa_cfg.numa_cfg = (numa_node & ENA_ETH_IO_NUMA_NODE_CFG_REG_NUMA_MASK)
+ | ENA_ETH_IO_NUMA_NODE_CFG_REG_ENABLED_MASK;
+
+ ENA_REG_WRITE32(io_cq->bus, numa_cfg.numa_cfg, io_cq->numa_node_cfg_reg);
+}
+
+static inline void ena_com_comp_ack(struct ena_com_io_sq *io_sq, u16 elem)
+{
+ io_sq->next_to_comp += elem;
+}
+
+#if defined(__cplusplus)
+}
+#endif
+#endif /* ENA_ETH_COM_H_ */