--- /dev/null
+/*-
+ * Copyright (c) 2016 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * This software was jointly developed between OKTET Labs (under contract
+ * for Solarflare) and Solarflare Communications, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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.
+ */
+
+#include <rte_debug.h>
+#include <rte_cycles.h>
+
+#include "efx.h"
+
+#include "sfc.h"
+#include "sfc_debug.h"
+#include "sfc_log.h"
+#include "sfc_ev.h"
+
+
+/* Initial delay when waiting for event queue init complete event */
+#define SFC_EVQ_INIT_BACKOFF_START_US (1)
+/* Maximum delay between event queue polling attempts */
+#define SFC_EVQ_INIT_BACKOFF_MAX_US (10 * 1000)
+/* Event queue init approx timeout */
+#define SFC_EVQ_INIT_TIMEOUT_US (2 * US_PER_S)
+
+
+static boolean_t
+sfc_ev_initialized(void *arg)
+{
+ struct sfc_evq *evq = arg;
+
+ /* Init done events may be duplicated on SFN7xxx (SFC bug 31631) */
+ SFC_ASSERT(evq->init_state == SFC_EVQ_STARTING ||
+ evq->init_state == SFC_EVQ_STARTED);
+
+ evq->init_state = SFC_EVQ_STARTED;
+
+ return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_rx(void *arg, __rte_unused uint32_t label, __rte_unused uint32_t id,
+ __rte_unused uint32_t size, __rte_unused uint16_t flags)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected Rx event", evq->evq_index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_tx(void *arg, __rte_unused uint32_t label, __rte_unused uint32_t id)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected Tx event", evq->evq_index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_exception(void *arg, __rte_unused uint32_t code,
+ __rte_unused uint32_t data)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected exception event",
+ evq->evq_index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_rxq_flush_done(void *arg, __rte_unused uint32_t rxq_hw_index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected Rx flush done event",
+ evq->evq_index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_rxq_flush_failed(void *arg, __rte_unused uint32_t rxq_hw_index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected Rx flush failed event",
+ evq->evq_index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_txq_flush_done(void *arg, __rte_unused uint32_t txq_hw_index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected Tx flush done event",
+ evq->evq_index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_software(void *arg, uint16_t magic)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected software event magic=%#.4x",
+ evq->evq_index, magic);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_sram(void *arg, uint32_t code)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected SRAM event code=%u",
+ evq->evq_index, code);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_wake_up(void *arg, uint32_t index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected wake up event index=%u",
+ evq->evq_index, index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_timer(void *arg, uint32_t index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected timer event index=%u",
+ evq->evq_index, index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_link_change(void *arg, __rte_unused efx_link_mode_t link_mode)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected link change",
+ evq->evq_index);
+ return B_TRUE;
+}
+
+static const efx_ev_callbacks_t sfc_ev_callbacks = {
+ .eec_initialized = sfc_ev_initialized,
+ .eec_rx = sfc_ev_rx,
+ .eec_tx = sfc_ev_tx,
+ .eec_exception = sfc_ev_exception,
+ .eec_rxq_flush_done = sfc_ev_rxq_flush_done,
+ .eec_rxq_flush_failed = sfc_ev_rxq_flush_failed,
+ .eec_txq_flush_done = sfc_ev_txq_flush_done,
+ .eec_software = sfc_ev_software,
+ .eec_sram = sfc_ev_sram,
+ .eec_wake_up = sfc_ev_wake_up,
+ .eec_timer = sfc_ev_timer,
+ .eec_link_change = sfc_ev_link_change,
+};
+
+
+void
+sfc_ev_qpoll(struct sfc_evq *evq)
+{
+ SFC_ASSERT(evq->init_state == SFC_EVQ_STARTED ||
+ evq->init_state == SFC_EVQ_STARTING);
+
+ /* Synchronize the DMA memory for reading not required */
+
+ efx_ev_qpoll(evq->common, &evq->read_ptr, &sfc_ev_callbacks, evq);
+
+ /* Poll-mode driver does not re-prime the event queue for interrupts */
+}
+
+int
+sfc_ev_qprime(struct sfc_evq *evq)
+{
+ SFC_ASSERT(evq->init_state == SFC_EVQ_STARTED);
+ return efx_ev_qprime(evq->common, evq->read_ptr);
+}
+
+int
+sfc_ev_qstart(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ const struct sfc_evq_info *evq_info;
+ struct sfc_evq *evq;
+ efsys_mem_t *esmp;
+ unsigned int total_delay_us;
+ unsigned int delay_us;
+ int rc;
+
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ evq_info = &sa->evq_info[sw_index];
+ evq = evq_info->evq;
+ esmp = &evq->mem;
+
+ /* Clear all events */
+ (void)memset((void *)esmp->esm_base, 0xff,
+ EFX_EVQ_SIZE(evq_info->entries));
+
+ /* Create the common code event queue */
+ rc = efx_ev_qcreate(sa->nic, sw_index, esmp, evq_info->entries,
+ 0 /* unused on EF10 */, 0,
+ EFX_EVQ_FLAGS_TYPE_THROUGHPUT |
+ EFX_EVQ_FLAGS_NOTIFY_DISABLED,
+ &evq->common);
+ if (rc != 0)
+ goto fail_ev_qcreate;
+
+ evq->init_state = SFC_EVQ_STARTING;
+
+ /* Wait for the initialization event */
+ total_delay_us = 0;
+ delay_us = SFC_EVQ_INIT_BACKOFF_START_US;
+ do {
+ (void)sfc_ev_qpoll(evq);
+
+ /* Check to see if the initialization complete indication
+ * posted by the hardware.
+ */
+ if (evq->init_state == SFC_EVQ_STARTED)
+ goto done;
+
+ /* Give event queue some time to init */
+ rte_delay_us(delay_us);
+
+ total_delay_us += delay_us;
+
+ /* Exponential backoff */
+ delay_us *= 2;
+ if (delay_us > SFC_EVQ_INIT_BACKOFF_MAX_US)
+ delay_us = SFC_EVQ_INIT_BACKOFF_MAX_US;
+
+ } while (total_delay_us < SFC_EVQ_INIT_TIMEOUT_US);
+
+ rc = ETIMEDOUT;
+ goto fail_timedout;
+
+done:
+ return 0;
+
+fail_timedout:
+ evq->init_state = SFC_EVQ_INITIALIZED;
+ efx_ev_qdestroy(evq->common);
+
+fail_ev_qcreate:
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_ev_qstop(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ const struct sfc_evq_info *evq_info;
+ struct sfc_evq *evq;
+
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ SFC_ASSERT(sw_index < sa->evq_count);
+
+ evq_info = &sa->evq_info[sw_index];
+ evq = evq_info->evq;
+
+ if (evq == NULL || evq->init_state != SFC_EVQ_STARTED)
+ return;
+
+ evq->init_state = SFC_EVQ_INITIALIZED;
+ evq->read_ptr = 0;
+ evq->exception = B_FALSE;
+
+ efx_ev_qdestroy(evq->common);
+}
+
+int
+sfc_ev_start(struct sfc_adapter *sa)
+{
+ int rc;
+
+ sfc_log_init(sa, "entry");
+
+ rc = efx_ev_init(sa->nic);
+ if (rc != 0)
+ goto fail_ev_init;
+
+ /*
+ * Rx/Tx event queues are started/stopped when corresponding queue
+ * is started/stopped.
+ */
+
+ return 0;
+
+fail_ev_init:
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_ev_stop(struct sfc_adapter *sa)
+{
+ unsigned int sw_index;
+
+ sfc_log_init(sa, "entry");
+
+ /* Make sure that all event queues are stopped */
+ sw_index = sa->evq_count;
+ while (sw_index-- > 0)
+ sfc_ev_qstop(sa, sw_index);
+
+ efx_ev_fini(sa->nic);
+}
+
+int
+sfc_ev_qinit(struct sfc_adapter *sa, unsigned int sw_index,
+ unsigned int entries, int socket_id)
+{
+ struct sfc_evq_info *evq_info;
+ struct sfc_evq *evq;
+ int rc;
+
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ evq_info = &sa->evq_info[sw_index];
+
+ SFC_ASSERT(rte_is_power_of_2(entries));
+ SFC_ASSERT(entries <= evq_info->max_entries);
+ evq_info->entries = entries;
+
+ evq = rte_zmalloc_socket("sfc-evq", sizeof(*evq), RTE_CACHE_LINE_SIZE,
+ socket_id);
+ if (evq == NULL)
+ return ENOMEM;
+
+ evq->sa = sa;
+ evq->evq_index = sw_index;
+
+ /* Allocate DMA space */
+ rc = sfc_dma_alloc(sa, "evq", sw_index, EFX_EVQ_SIZE(evq_info->entries),
+ socket_id, &evq->mem);
+ if (rc != 0)
+ return rc;
+
+ evq->init_state = SFC_EVQ_INITIALIZED;
+
+ evq_info->evq = evq;
+
+ return 0;
+}
+
+void
+sfc_ev_qfini(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct sfc_evq *evq;
+
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ evq = sa->evq_info[sw_index].evq;
+
+ SFC_ASSERT(evq->init_state == SFC_EVQ_INITIALIZED);
+
+ sa->evq_info[sw_index].evq = NULL;
+
+ sfc_dma_free(sa, &evq->mem);
+
+ rte_free(evq);
+}
+
+static int
+sfc_ev_qinit_info(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ struct sfc_evq_info *evq_info = &sa->evq_info[sw_index];
+ unsigned int max_entries;
+
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ max_entries = sfc_evq_max_entries(sa, sw_index);
+ SFC_ASSERT(rte_is_power_of_2(max_entries));
+
+ evq_info->max_entries = max_entries;
+
+ return 0;
+}
+
+static void
+sfc_ev_qfini_info(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ sfc_log_init(sa, "sw_index=%u", sw_index);
+
+ /* Nothing to cleanup */
+}
+
+int
+sfc_ev_init(struct sfc_adapter *sa)
+{
+ int rc;
+ unsigned int sw_index;
+
+ sfc_log_init(sa, "entry");
+
+ sa->evq_count = sfc_ev_qcount(sa);
+ sa->mgmt_evq_index = 0;
+
+ /* Allocate EVQ info array */
+ rc = ENOMEM;
+ sa->evq_info = rte_calloc_socket("sfc-evqs", sa->evq_count,
+ sizeof(struct sfc_evq_info), 0,
+ sa->socket_id);
+ if (sa->evq_info == NULL)
+ goto fail_evqs_alloc;
+
+ for (sw_index = 0; sw_index < sa->evq_count; ++sw_index) {
+ rc = sfc_ev_qinit_info(sa, sw_index);
+ if (rc != 0)
+ goto fail_ev_qinit_info;
+ }
+
+ /*
+ * Rx/Tx event queues are created/destroyed when corresponding
+ * Rx/Tx queue is created/destroyed.
+ */
+
+ return 0;
+
+fail_ev_qinit_info:
+ while (sw_index-- > 0)
+ sfc_ev_qfini_info(sa, sw_index);
+
+ rte_free(sa->evq_info);
+ sa->evq_info = NULL;
+
+fail_evqs_alloc:
+ sa->evq_count = 0;
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_ev_fini(struct sfc_adapter *sa)
+{
+ int sw_index;
+
+ sfc_log_init(sa, "entry");
+
+ /* Cleanup all event queues */
+ sw_index = sa->evq_count;
+ while (--sw_index >= 0) {
+ if (sa->evq_info[sw_index].evq != NULL)
+ sfc_ev_qfini(sa, sw_index);
+ sfc_ev_qfini_info(sa, sw_index);
+ }
+
+ rte_free(sa->evq_info);
+ sa->evq_info = NULL;
+ sa->evq_count = 0;
+}
--- /dev/null
+/*-
+ * Copyright (c) 2016 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * This software was jointly developed between OKTET Labs (under contract
+ * for Solarflare) and Solarflare Communications, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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 _SFC_EV_H_
+#define _SFC_EV_H_
+
+#include "efx.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Number of entries in the management event queue */
+#define SFC_MGMT_EVQ_ENTRIES (EFX_EVQ_MINNEVS)
+
+struct sfc_adapter;
+
+enum sfc_evq_state {
+ SFC_EVQ_UNINITIALIZED = 0,
+ SFC_EVQ_INITIALIZED,
+ SFC_EVQ_STARTING,
+ SFC_EVQ_STARTED,
+
+ SFC_EVQ_NSTATES
+};
+
+struct sfc_evq {
+ /* Used on datapath */
+ efx_evq_t *common;
+ unsigned int read_ptr;
+ boolean_t exception;
+ efsys_mem_t mem;
+
+ /* Not used on datapath */
+ struct sfc_adapter *sa;
+ unsigned int evq_index;
+ enum sfc_evq_state init_state;
+};
+
+struct sfc_evq_info {
+ /* Maximum number of EVQ entries taken into account when buffer
+ * table space is allocated.
+ */
+ unsigned int max_entries;
+ /* Real number of EVQ entries, less or equal to max_entries */
+ unsigned int entries;
+ /* NUMA-aware EVQ data structure used on datapath */
+ struct sfc_evq *evq;
+};
+
+/*
+ * Functions below define event queue to transmit/receive queue and vice
+ * versa mapping.
+ */
+
+static inline unsigned int
+sfc_ev_qcount(struct sfc_adapter *sa)
+{
+ const struct rte_eth_dev_data *dev_data = sa->eth_dev->data;
+
+ /*
+ * One management EVQ for global events.
+ * Own EVQ for each Tx and Rx queue.
+ */
+ return 1 + dev_data->nb_rx_queues + dev_data->nb_tx_queues;
+}
+
+static inline unsigned int
+sfc_evq_max_entries(struct sfc_adapter *sa, unsigned int sw_index)
+{
+ unsigned int max_entries;
+
+ if (sw_index == sa->mgmt_evq_index)
+ max_entries = SFC_MGMT_EVQ_ENTRIES;
+ else if (sw_index <= sa->eth_dev->data->nb_rx_queues)
+ max_entries = EFX_RXQ_MAXNDESCS;
+ else
+ max_entries = efx_nic_cfg_get(sa->nic)->enc_txq_max_ndescs;
+
+ return max_entries;
+}
+
+static inline unsigned int
+sfc_evq_index_by_rxq_sw_index(__rte_unused struct sfc_adapter *sa,
+ unsigned int rxq_sw_index)
+{
+ return 1 + rxq_sw_index;
+}
+
+static inline unsigned int
+sfc_evq_index_by_txq_sw_index(struct sfc_adapter *sa, unsigned int txq_sw_index)
+{
+ return 1 + sa->eth_dev->data->nb_rx_queues + txq_sw_index;
+}
+
+int sfc_ev_init(struct sfc_adapter *sa);
+void sfc_ev_fini(struct sfc_adapter *sa);
+int sfc_ev_start(struct sfc_adapter *sa);
+void sfc_ev_stop(struct sfc_adapter *sa);
+
+int sfc_ev_qinit(struct sfc_adapter *sa, unsigned int sw_index,
+ unsigned int entries, int socket_id);
+void sfc_ev_qfini(struct sfc_adapter *sa, unsigned int sw_index);
+int sfc_ev_qstart(struct sfc_adapter *sa, unsigned int sw_index);
+void sfc_ev_qstop(struct sfc_adapter *sa, unsigned int sw_index);
+
+int sfc_ev_qprime(struct sfc_evq *evq);
+void sfc_ev_qpoll(struct sfc_evq *evq);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _SFC_EV_H_ */
git.droids-corp.org / dpdk.git / commitdiff