-/*-
-* 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.
-*/
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2015-2019 Amazon.com, Inc. or its affiliates.
+ * All rights reserved.
+ */
#ifndef ENA_ETH_COM_H_
#define ENA_ETH_COM_H_
enum ena_eth_io_l4_proto_index l4_proto;
bool l3_csum_err;
bool l4_csum_err;
- bool l4_csum_checked;
+ u8 l4_csum_checked;
/* fragmented packet */
bool frag;
u32 hash;
u16 descs;
int max_bufs;
+ u8 pkt_offset;
};
-bool ena_com_is_doorbell_needed(struct ena_com_io_sq *io_sq,
- struct ena_com_tx_ctx *ena_tx_ctx);
-
int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
struct ena_com_tx_ctx *ena_tx_ctx,
int *nb_hw_desc);
ENA_REG_WRITE32(io_cq->bus, intr_reg->intr_control, io_cq->unmask_reg);
}
-static inline int ena_com_free_desc(struct ena_com_io_sq *io_sq)
+static inline int ena_com_free_q_entries(struct ena_com_io_sq *io_sq)
{
u16 tail, next_to_comp, cnt;
int temp;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
- return ena_com_free_desc(io_sq) >= required_buffers;
+ return ena_com_free_q_entries(io_sq) >= required_buffers;
/* This calculation doesn't need to be 100% accurate. So to reduce
* the calculation overhead just Subtract 2 lines from the free descs
*/
temp = required_buffers / io_sq->llq_info.descs_per_entry + 2;
- return ena_com_free_desc(io_sq) > temp;
+ return ena_com_free_q_entries(io_sq) > temp;
+}
+
+static inline bool ena_com_meta_desc_changed(struct ena_com_io_sq *io_sq,
+ struct ena_com_tx_ctx *ena_tx_ctx)
+{
+ if (!ena_tx_ctx->meta_valid)
+ return false;
+
+ return !!memcmp(&io_sq->cached_tx_meta,
+ &ena_tx_ctx->ena_meta,
+ sizeof(struct ena_com_tx_meta));
}
static inline bool is_llq_max_tx_burst_exists(struct ena_com_io_sq *io_sq)
io_sq->llq_info.max_entries_in_tx_burst > 0;
}
+static inline bool ena_com_is_doorbell_needed(struct ena_com_io_sq *io_sq,
+ struct ena_com_tx_ctx *ena_tx_ctx)
+{
+ struct ena_com_llq_info *llq_info;
+ int descs_after_first_entry;
+ int num_entries_needed = 1;
+ u16 num_descs;
+
+ if (!is_llq_max_tx_burst_exists(io_sq))
+ return false;
+
+ llq_info = &io_sq->llq_info;
+ num_descs = ena_tx_ctx->num_bufs;
+
+ if (unlikely(ena_com_meta_desc_changed(io_sq, ena_tx_ctx)))
+ ++num_descs;
+
+ if (num_descs > llq_info->descs_num_before_header) {
+ descs_after_first_entry = num_descs - llq_info->descs_num_before_header;
+ num_entries_needed += DIV_ROUND_UP(descs_after_first_entry,
+ llq_info->descs_per_entry);
+ }
+
+ ena_trc_dbg("queue: %d num_descs: %d num_entries_needed: %d\n",
+ io_sq->qid, num_descs, num_entries_needed);
+
+ return num_entries_needed > io_sq->entries_in_tx_burst_left;
+}
+
static inline int ena_com_write_sq_doorbell(struct ena_com_io_sq *io_sq)
{
- u16 tail = io_sq->tail;
u16 max_entries_in_tx_burst = io_sq->llq_info.max_entries_in_tx_burst;
+ u16 tail = io_sq->tail;
ena_trc_dbg("write submission queue doorbell for queue: %d tail: %d\n",
io_sq->qid, tail);
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;
+ if (unlikely(io_cq->cq_head_db_reg)) {
+ 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 (unlikely(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;
io_cq->phase ^= 1;
}
-static inline int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id)
+static inline int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq,
+ u16 *req_id)
{
u8 expected_phase, cdesc_phase;
struct ena_eth_io_tx_cdesc *cdesc;
git.droids-corp.org / dpdk.git / blobdiff