2 * Copyright (c) 2016 Solarflare Communications Inc.
5 * This software was jointly developed between OKTET Labs (under contract
6 * for Solarflare) and Solarflare Communications, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
19 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
27 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 sfc_rx_qcheck_conf(struct sfc_adapter *sa,
39 const struct rte_eth_rxconf *rx_conf)
43 if (rx_conf->rx_thresh.pthresh != 0 ||
44 rx_conf->rx_thresh.hthresh != 0 ||
45 rx_conf->rx_thresh.wthresh != 0) {
47 "RxQ prefetch/host/writeback thresholds are not supported");
51 if (rx_conf->rx_free_thresh != 0) {
52 sfc_err(sa, "RxQ free threshold is not supported");
56 if (rx_conf->rx_drop_en == 0) {
57 sfc_err(sa, "RxQ drop disable is not supported");
61 if (rx_conf->rx_deferred_start != 0) {
62 sfc_err(sa, "RxQ deferred start is not supported");
70 sfc_rx_qinit(struct sfc_adapter *sa, unsigned int sw_index,
71 uint16_t nb_rx_desc, unsigned int socket_id,
72 const struct rte_eth_rxconf *rx_conf,
73 struct rte_mempool *mb_pool)
76 struct sfc_rxq_info *rxq_info;
77 unsigned int evq_index;
81 rc = sfc_rx_qcheck_conf(sa, rx_conf);
85 if (rte_pktmbuf_data_room_size(mb_pool) <= RTE_PKTMBUF_HEADROOM) {
86 sfc_err(sa, "RxQ %u mbuf is too small, %u vs headroom %u",
87 sw_index, rte_pktmbuf_data_room_size(mb_pool),
88 RTE_PKTMBUF_HEADROOM);
92 SFC_ASSERT(sw_index < sa->rxq_count);
93 rxq_info = &sa->rxq_info[sw_index];
95 SFC_ASSERT(nb_rx_desc <= rxq_info->max_entries);
96 rxq_info->entries = nb_rx_desc;
97 rxq_info->type = EFX_RXQ_TYPE_DEFAULT;
99 evq_index = sfc_evq_index_by_rxq_sw_index(sa, sw_index);
101 rc = sfc_ev_qinit(sa, evq_index, rxq_info->entries, socket_id);
105 evq = sa->evq_info[evq_index].evq;
108 rxq = rte_zmalloc_socket("sfc-rxq", sizeof(*rxq), RTE_CACHE_LINE_SIZE,
113 rc = sfc_dma_alloc(sa, "rxq", sw_index, EFX_RXQ_SIZE(rxq_info->entries),
114 socket_id, &rxq->mem);
119 rxq->sw_desc = rte_calloc_socket("sfc-rxq-sw_desc", rxq_info->entries,
120 sizeof(*rxq->sw_desc),
121 RTE_CACHE_LINE_SIZE, socket_id);
122 if (rxq->sw_desc == NULL)
123 goto fail_desc_alloc;
127 rxq->ptr_mask = rxq_info->entries - 1;
128 rxq->refill_mb_pool = mb_pool;
129 rxq->hw_index = sw_index;
131 rxq->state = SFC_RXQ_INITIALIZED;
138 sfc_dma_free(sa, &rxq->mem);
144 sfc_ev_qfini(sa, evq_index);
147 rxq_info->entries = 0;
150 sfc_log_init(sa, "failed %d", rc);
155 sfc_rx_qfini(struct sfc_adapter *sa, unsigned int sw_index)
157 struct sfc_rxq_info *rxq_info;
160 SFC_ASSERT(sw_index < sa->rxq_count);
162 rxq_info = &sa->rxq_info[sw_index];
165 SFC_ASSERT(rxq->state == SFC_RXQ_INITIALIZED);
167 rxq_info->rxq = NULL;
168 rxq_info->entries = 0;
170 rte_free(rxq->sw_desc);
171 sfc_dma_free(sa, &rxq->mem);
176 sfc_rx_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
178 struct sfc_rxq_info *rxq_info = &sa->rxq_info[sw_index];
179 unsigned int max_entries;
181 max_entries = EFX_RXQ_MAXNDESCS;
182 SFC_ASSERT(rte_is_power_of_2(max_entries));
184 rxq_info->max_entries = max_entries;
190 sfc_rx_check_mode(struct sfc_adapter *sa, struct rte_eth_rxmode *rxmode)
194 switch (rxmode->mq_mode) {
196 /* No special checks are required */
199 sfc_err(sa, "Rx multi-queue mode %u not supported",
204 if (rxmode->header_split) {
205 sfc_err(sa, "Header split on Rx not supported");
209 if (rxmode->hw_vlan_filter) {
210 sfc_err(sa, "HW VLAN filtering not supported");
214 if (rxmode->hw_vlan_strip) {
215 sfc_err(sa, "HW VLAN stripping not supported");
219 if (rxmode->hw_vlan_extend) {
221 "Q-in-Q HW VLAN stripping not supported");
225 if (!rxmode->hw_strip_crc) {
227 "FCS stripping control not supported - always stripped");
228 rxmode->hw_strip_crc = 1;
231 if (rxmode->enable_scatter) {
232 sfc_err(sa, "Scatter on Rx not supported");
236 if (rxmode->enable_lro) {
237 sfc_err(sa, "LRO not supported");
245 * Initialize Rx subsystem.
247 * Called at device configuration stage when number of receive queues is
248 * specified together with other device level receive configuration.
250 * It should be used to allocate NUMA-unaware resources.
253 sfc_rx_init(struct sfc_adapter *sa)
255 struct rte_eth_conf *dev_conf = &sa->eth_dev->data->dev_conf;
256 unsigned int sw_index;
259 rc = sfc_rx_check_mode(sa, &dev_conf->rxmode);
261 goto fail_check_mode;
263 sa->rxq_count = sa->eth_dev->data->nb_rx_queues;
266 sa->rxq_info = rte_calloc_socket("sfc-rxqs", sa->rxq_count,
267 sizeof(struct sfc_rxq_info), 0,
269 if (sa->rxq_info == NULL)
270 goto fail_rxqs_alloc;
272 for (sw_index = 0; sw_index < sa->rxq_count; ++sw_index) {
273 rc = sfc_rx_qinit_info(sa, sw_index);
275 goto fail_rx_qinit_info;
281 rte_free(sa->rxq_info);
287 sfc_log_init(sa, "failed %d", rc);
292 * Shutdown Rx subsystem.
294 * Called at device close stage, for example, before device
295 * reconfiguration or shutdown.
298 sfc_rx_fini(struct sfc_adapter *sa)
300 unsigned int sw_index;
302 sw_index = sa->rxq_count;
303 while (sw_index-- > 0) {
304 if (sa->rxq_info[sw_index].rxq != NULL)
305 sfc_rx_qfini(sa, sw_index);
308 rte_free(sa->rxq_info);