--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) 2016-2017 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 <rte_alarm.h>
+#include <rte_branch_prediction.h>
+
+#include "efx.h"
+
+#include "sfc.h"
+#include "sfc_debug.h"
+#include "sfc_log.h"
+#include "sfc_ev.h"
+#include "sfc_rx.h"
+#include "sfc_tx.h"
+#include "sfc_kvargs.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)
+
+/* Management event queue polling period in microseconds */
+#define SFC_MGMT_EV_QPOLL_PERIOD_US (US_PER_S)
+
+static const char *
+sfc_evq_type2str(enum sfc_evq_type type)
+{
+ switch (type) {
+ case SFC_EVQ_TYPE_MGMT:
+ return "mgmt-evq";
+ case SFC_EVQ_TYPE_RX:
+ return "rx-evq";
+ case SFC_EVQ_TYPE_TX:
+ return "tx-evq";
+ default:
+ SFC_ASSERT(B_FALSE);
+ return NULL;
+ }
+}
+
+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_nop_rx(void *arg, uint32_t label, uint32_t id,
+ uint32_t size, uint16_t flags)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa,
+ "EVQ %u unexpected Rx event label=%u id=%#x size=%u flags=%#x",
+ evq->evq_index, label, id, size, flags);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_efx_rx(void *arg, __rte_unused uint32_t label, uint32_t id,
+ uint32_t size, uint16_t flags)
+{
+ struct sfc_evq *evq = arg;
+ struct sfc_efx_rxq *rxq;
+ unsigned int stop;
+ unsigned int pending_id;
+ unsigned int delta;
+ unsigned int i;
+ struct sfc_efx_rx_sw_desc *rxd;
+
+ if (unlikely(evq->exception))
+ goto done;
+
+ rxq = sfc_efx_rxq_by_dp_rxq(evq->dp_rxq);
+
+ SFC_ASSERT(rxq != NULL);
+ SFC_ASSERT(rxq->evq == evq);
+ SFC_ASSERT(rxq->flags & SFC_EFX_RXQ_FLAG_STARTED);
+
+ stop = (id + 1) & rxq->ptr_mask;
+ pending_id = rxq->pending & rxq->ptr_mask;
+ delta = (stop >= pending_id) ? (stop - pending_id) :
+ (rxq->ptr_mask + 1 - pending_id + stop);
+
+ if (delta == 0) {
+ /*
+ * Rx event with no new descriptors done and zero length
+ * is used to abort scattered packet when there is no room
+ * for the tail.
+ */
+ if (unlikely(size != 0)) {
+ evq->exception = B_TRUE;
+ sfc_err(evq->sa,
+ "EVQ %u RxQ %u invalid RX abort "
+ "(id=%#x size=%u flags=%#x); needs restart",
+ evq->evq_index, rxq->dp.dpq.queue_id,
+ id, size, flags);
+ goto done;
+ }
+
+ /* Add discard flag to the first fragment */
+ rxq->sw_desc[pending_id].flags |= EFX_DISCARD;
+ /* Remove continue flag from the last fragment */
+ rxq->sw_desc[id].flags &= ~EFX_PKT_CONT;
+ } else if (unlikely(delta > rxq->batch_max)) {
+ evq->exception = B_TRUE;
+
+ sfc_err(evq->sa,
+ "EVQ %u RxQ %u completion out of order "
+ "(id=%#x delta=%u flags=%#x); needs restart",
+ evq->evq_index, rxq->dp.dpq.queue_id,
+ id, delta, flags);
+
+ goto done;
+ }
+
+ for (i = pending_id; i != stop; i = (i + 1) & rxq->ptr_mask) {
+ rxd = &rxq->sw_desc[i];
+
+ rxd->flags = flags;
+
+ SFC_ASSERT(size < (1 << 16));
+ rxd->size = (uint16_t)size;
+ }
+
+ rxq->pending += delta;
+
+done:
+ return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_dp_rx(void *arg, __rte_unused uint32_t label, uint32_t id,
+ __rte_unused uint32_t size, __rte_unused uint16_t flags)
+{
+ struct sfc_evq *evq = arg;
+ struct sfc_dp_rxq *dp_rxq;
+
+ dp_rxq = evq->dp_rxq;
+ SFC_ASSERT(dp_rxq != NULL);
+
+ SFC_ASSERT(evq->sa->dp_rx->qrx_ev != NULL);
+ return evq->sa->dp_rx->qrx_ev(dp_rxq, id);
+}
+
+static boolean_t
+sfc_ev_nop_tx(void *arg, uint32_t label, uint32_t id)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected Tx event label=%u id=%#x",
+ evq->evq_index, label, id);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_tx(void *arg, __rte_unused uint32_t label, uint32_t id)
+{
+ struct sfc_evq *evq = arg;
+ struct sfc_dp_txq *dp_txq;
+ struct sfc_efx_txq *txq;
+ unsigned int stop;
+ unsigned int delta;
+
+ dp_txq = evq->dp_txq;
+ SFC_ASSERT(dp_txq != NULL);
+
+ txq = sfc_efx_txq_by_dp_txq(dp_txq);
+ SFC_ASSERT(txq->evq == evq);
+
+ if (unlikely((txq->flags & SFC_EFX_TXQ_FLAG_STARTED) == 0))
+ goto done;
+
+ stop = (id + 1) & txq->ptr_mask;
+ id = txq->pending & txq->ptr_mask;
+
+ delta = (stop >= id) ? (stop - id) : (txq->ptr_mask + 1 - id + stop);
+
+ txq->pending += delta;
+
+done:
+ return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_dp_tx(void *arg, __rte_unused uint32_t label, uint32_t id)
+{
+ struct sfc_evq *evq = arg;
+ struct sfc_dp_txq *dp_txq;
+
+ dp_txq = evq->dp_txq;
+ SFC_ASSERT(dp_txq != NULL);
+
+ SFC_ASSERT(evq->sa->dp_tx->qtx_ev != NULL);
+ return evq->sa->dp_tx->qtx_ev(dp_txq, id);
+}
+
+static boolean_t
+sfc_ev_exception(void *arg, __rte_unused uint32_t code,
+ __rte_unused uint32_t data)
+{
+ struct sfc_evq *evq = arg;
+
+ if (code == EFX_EXCEPTION_UNKNOWN_SENSOREVT)
+ return B_FALSE;
+
+ evq->exception = B_TRUE;
+ sfc_warn(evq->sa,
+ "hardware exception %s (code=%u, data=%#x) on EVQ %u;"
+ " needs recovery",
+ (code == EFX_EXCEPTION_RX_RECOVERY) ? "RX_RECOVERY" :
+ (code == EFX_EXCEPTION_RX_DSC_ERROR) ? "RX_DSC_ERROR" :
+ (code == EFX_EXCEPTION_TX_DSC_ERROR) ? "TX_DSC_ERROR" :
+ (code == EFX_EXCEPTION_FWALERT_SRAM) ? "FWALERT_SRAM" :
+ (code == EFX_EXCEPTION_UNKNOWN_FWALERT) ? "UNKNOWN_FWALERT" :
+ (code == EFX_EXCEPTION_RX_ERROR) ? "RX_ERROR" :
+ (code == EFX_EXCEPTION_TX_ERROR) ? "TX_ERROR" :
+ (code == EFX_EXCEPTION_EV_ERROR) ? "EV_ERROR" :
+ "UNKNOWN",
+ code, data, evq->evq_index);
+
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_nop_rxq_flush_done(void *arg, uint32_t rxq_hw_index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected RxQ %u flush done",
+ evq->evq_index, rxq_hw_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;
+ struct sfc_dp_rxq *dp_rxq;
+ struct sfc_rxq *rxq;
+
+ dp_rxq = evq->dp_rxq;
+ SFC_ASSERT(dp_rxq != NULL);
+
+ rxq = sfc_rxq_by_dp_rxq(dp_rxq);
+ SFC_ASSERT(rxq != NULL);
+ SFC_ASSERT(rxq->hw_index == rxq_hw_index);
+ SFC_ASSERT(rxq->evq == evq);
+ sfc_rx_qflush_done(rxq);
+
+ return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_nop_rxq_flush_failed(void *arg, uint32_t rxq_hw_index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected RxQ %u flush failed",
+ evq->evq_index, rxq_hw_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;
+ struct sfc_dp_rxq *dp_rxq;
+ struct sfc_rxq *rxq;
+
+ dp_rxq = evq->dp_rxq;
+ SFC_ASSERT(dp_rxq != NULL);
+
+ rxq = sfc_rxq_by_dp_rxq(dp_rxq);
+ SFC_ASSERT(rxq != NULL);
+ SFC_ASSERT(rxq->hw_index == rxq_hw_index);
+ SFC_ASSERT(rxq->evq == evq);
+ sfc_rx_qflush_failed(rxq);
+
+ return B_FALSE;
+}
+
+static boolean_t
+sfc_ev_nop_txq_flush_done(void *arg, uint32_t txq_hw_index)
+{
+ struct sfc_evq *evq = arg;
+
+ sfc_err(evq->sa, "EVQ %u unexpected TxQ %u flush done",
+ evq->evq_index, txq_hw_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;
+ struct sfc_dp_txq *dp_txq;
+ struct sfc_txq *txq;
+
+ dp_txq = evq->dp_txq;
+ SFC_ASSERT(dp_txq != NULL);
+
+ txq = sfc_txq_by_dp_txq(dp_txq);
+ SFC_ASSERT(txq != NULL);
+ SFC_ASSERT(txq->hw_index == txq_hw_index);
+ SFC_ASSERT(txq->evq == evq);
+ sfc_tx_qflush_done(txq);
+
+ return B_FALSE;
+}
+
+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_nop_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 event",
+ evq->evq_index);
+ return B_TRUE;
+}
+
+static boolean_t
+sfc_ev_link_change(void *arg, efx_link_mode_t link_mode)
+{
+ struct sfc_evq *evq = arg;
+ struct sfc_adapter *sa = evq->sa;
+ struct rte_eth_link *dev_link = &sa->eth_dev->data->dev_link;
+ struct rte_eth_link new_link;
+ uint64_t new_link_u64;
+ uint64_t old_link_u64;
+
+ EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
+
+ sfc_port_link_mode_to_info(link_mode, &new_link);
+
+ new_link_u64 = *(uint64_t *)&new_link;
+ do {
+ old_link_u64 = rte_atomic64_read((rte_atomic64_t *)dev_link);
+ if (old_link_u64 == new_link_u64)
+ break;
+
+ if (rte_atomic64_cmpset((volatile uint64_t *)dev_link,
+ old_link_u64, new_link_u64)) {
+ evq->sa->port.lsc_seq++;
+ break;
+ }
+ } while (B_TRUE);
+
+ return B_FALSE;
+}
+
+static const efx_ev_callbacks_t sfc_ev_callbacks = {
+ .eec_initialized = sfc_ev_initialized,
+ .eec_rx = sfc_ev_nop_rx,
+ .eec_tx = sfc_ev_nop_tx,
+ .eec_exception = sfc_ev_exception,
+ .eec_rxq_flush_done = sfc_ev_nop_rxq_flush_done,
+ .eec_rxq_flush_failed = sfc_ev_nop_rxq_flush_failed,
+ .eec_txq_flush_done = sfc_ev_nop_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,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_efx_rx = {
+ .eec_initialized = sfc_ev_initialized,
+ .eec_rx = sfc_ev_efx_rx,
+ .eec_tx = sfc_ev_nop_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_nop_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_nop_link_change,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_dp_rx = {
+ .eec_initialized = sfc_ev_initialized,
+ .eec_rx = sfc_ev_dp_rx,
+ .eec_tx = sfc_ev_nop_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_nop_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_nop_link_change,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_efx_tx = {
+ .eec_initialized = sfc_ev_initialized,
+ .eec_rx = sfc_ev_nop_rx,
+ .eec_tx = sfc_ev_tx,
+ .eec_exception = sfc_ev_exception,
+ .eec_rxq_flush_done = sfc_ev_nop_rxq_flush_done,
+ .eec_rxq_flush_failed = sfc_ev_nop_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_nop_link_change,
+};
+
+static const efx_ev_callbacks_t sfc_ev_callbacks_dp_tx = {
+ .eec_initialized = sfc_ev_initialized,
+ .eec_rx = sfc_ev_nop_rx,
+ .eec_tx = sfc_ev_dp_tx,
+ .eec_exception = sfc_ev_exception,
+ .eec_rxq_flush_done = sfc_ev_nop_rxq_flush_done,
+ .eec_rxq_flush_failed = sfc_ev_nop_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_nop_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, evq->callbacks, evq);
+
+ if (unlikely(evq->exception) && sfc_adapter_trylock(evq->sa)) {
+ struct sfc_adapter *sa = evq->sa;
+ int rc;
+
+ if (evq->dp_rxq != NULL) {
+ unsigned int rxq_sw_index;
+
+ rxq_sw_index = evq->dp_rxq->dpq.queue_id;
+
+ sfc_warn(sa,
+ "restart RxQ %u because of exception on its EvQ %u",
+ rxq_sw_index, evq->evq_index);
+
+ sfc_rx_qstop(sa, rxq_sw_index);
+ rc = sfc_rx_qstart(sa, rxq_sw_index);
+ if (rc != 0)
+ sfc_err(sa, "cannot restart RxQ %u",
+ rxq_sw_index);
+ }
+
+ if (evq->dp_txq != NULL) {
+ unsigned int txq_sw_index;
+
+ txq_sw_index = evq->dp_txq->dpq.queue_id;
+
+ sfc_warn(sa,
+ "restart TxQ %u because of exception on its EvQ %u",
+ txq_sw_index, evq->evq_index);
+
+ sfc_tx_qstop(sa, txq_sw_index);
+ rc = sfc_tx_qstart(sa, txq_sw_index);
+ if (rc != 0)
+ sfc_err(sa, "cannot restart TxQ %u",
+ txq_sw_index);
+ }
+
+ if (evq->exception)
+ sfc_panic(sa, "unrecoverable exception on EvQ %u",
+ evq->evq_index);
+
+ sfc_adapter_unlock(sa);
+ }
+
+ /* Poll-mode driver does not re-prime the event queue for interrupts */
+}
+
+void
+sfc_ev_mgmt_qpoll(struct sfc_adapter *sa)
+{
+ if (rte_spinlock_trylock(&sa->mgmt_evq_lock)) {
+ struct sfc_evq *mgmt_evq = sa->mgmt_evq;
+
+ if (mgmt_evq->init_state == SFC_EVQ_STARTED)
+ sfc_ev_qpoll(mgmt_evq);
+
+ rte_spinlock_unlock(&sa->mgmt_evq_lock);
+ }
+}
+
+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);
+}
+
+/* Event queue HW index allocation scheme is described in sfc_ev.h. */
+int
+sfc_ev_qstart(struct sfc_evq *evq, unsigned int hw_index)
+{
+ struct sfc_adapter *sa = evq->sa;
+ efsys_mem_t *esmp;
+ uint32_t evq_flags = sa->evq_flags;
+ unsigned int total_delay_us;
+ unsigned int delay_us;
+ int rc;
+
+ sfc_log_init(sa, "hw_index=%u", hw_index);
+
+ esmp = &evq->mem;
+
+ evq->evq_index = hw_index;
+
+ /* Clear all events */
+ (void)memset((void *)esmp->esm_base, 0xff, EFX_EVQ_SIZE(evq->entries));
+
+ if (sa->intr.lsc_intr && hw_index == sa->mgmt_evq_index)
+ evq_flags |= EFX_EVQ_FLAGS_NOTIFY_INTERRUPT;
+ else
+ evq_flags |= EFX_EVQ_FLAGS_NOTIFY_DISABLED;
+
+ /* Create the common code event queue */
+ rc = efx_ev_qcreate(sa->nic, hw_index, esmp, evq->entries,
+ 0 /* unused on EF10 */, 0, evq_flags,
+ &evq->common);
+ if (rc != 0)
+ goto fail_ev_qcreate;
+
+ SFC_ASSERT(evq->dp_rxq == NULL || evq->dp_txq == NULL);
+ if (evq->dp_rxq != 0) {
+ if (strcmp(sa->dp_rx->dp.name, SFC_KVARG_DATAPATH_EFX) == 0)
+ evq->callbacks = &sfc_ev_callbacks_efx_rx;
+ else
+ evq->callbacks = &sfc_ev_callbacks_dp_rx;
+ } else if (evq->dp_txq != 0) {
+ if (strcmp(sa->dp_tx->dp.name, SFC_KVARG_DATAPATH_EFX) == 0)
+ evq->callbacks = &sfc_ev_callbacks_efx_tx;
+ else
+ evq->callbacks = &sfc_ev_callbacks_dp_tx;
+ } else {
+ evq->callbacks = &sfc_ev_callbacks;
+ }
+
+ 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_evq *evq)
+{
+ if (evq == NULL)
+ return;
+
+ sfc_log_init(evq->sa, "hw_index=%u", evq->evq_index);
+
+ if (evq->init_state != SFC_EVQ_STARTED)
+ return;
+
+ evq->init_state = SFC_EVQ_INITIALIZED;
+ evq->callbacks = NULL;
+ evq->read_ptr = 0;
+ evq->exception = B_FALSE;
+
+ efx_ev_qdestroy(evq->common);
+
+ evq->evq_index = 0;
+}
+
+static void
+sfc_ev_mgmt_periodic_qpoll(void *arg)
+{
+ struct sfc_adapter *sa = arg;
+ int rc;
+
+ sfc_ev_mgmt_qpoll(sa);
+
+ rc = rte_eal_alarm_set(SFC_MGMT_EV_QPOLL_PERIOD_US,
+ sfc_ev_mgmt_periodic_qpoll, sa);
+ if (rc == -ENOTSUP) {
+ sfc_warn(sa, "alarms are not supported");
+ sfc_warn(sa, "management EVQ must be polled indirectly using no-wait link status update");
+ } else if (rc != 0) {
+ sfc_err(sa,
+ "cannot rearm management EVQ polling alarm (rc=%d)",
+ rc);
+ }
+}
+
+static void
+sfc_ev_mgmt_periodic_qpoll_start(struct sfc_adapter *sa)
+{
+ sfc_ev_mgmt_periodic_qpoll(sa);
+}
+
+static void
+sfc_ev_mgmt_periodic_qpoll_stop(struct sfc_adapter *sa)
+{
+ rte_eal_alarm_cancel(sfc_ev_mgmt_periodic_qpoll, sa);
+}
+
+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;
+
+ /* Start management EVQ used for global events */
+ rte_spinlock_lock(&sa->mgmt_evq_lock);
+
+ rc = sfc_ev_qstart(sa->mgmt_evq, sa->mgmt_evq_index);
+ if (rc != 0)
+ goto fail_mgmt_evq_start;
+
+ if (sa->intr.lsc_intr) {
+ rc = sfc_ev_qprime(sa->mgmt_evq);
+ if (rc != 0)
+ goto fail_evq0_prime;
+ }
+
+ rte_spinlock_unlock(&sa->mgmt_evq_lock);
+
+ /*
+ * Start management EVQ polling. If interrupts are disabled
+ * (not used), it is required to process link status change
+ * and other device level events to avoid unrecoverable
+ * error because the event queue overflow.
+ */
+ sfc_ev_mgmt_periodic_qpoll_start(sa);
+
+ /*
+ * Rx/Tx event queues are started/stopped when corresponding
+ * Rx/Tx queue is started/stopped.
+ */
+
+ return 0;
+
+fail_evq0_prime:
+ sfc_ev_qstop(sa->mgmt_evq);
+
+fail_mgmt_evq_start:
+ rte_spinlock_unlock(&sa->mgmt_evq_lock);
+ efx_ev_fini(sa->nic);
+
+fail_ev_init:
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_ev_stop(struct sfc_adapter *sa)
+{
+ sfc_log_init(sa, "entry");
+
+ sfc_ev_mgmt_periodic_qpoll_stop(sa);
+
+ rte_spinlock_lock(&sa->mgmt_evq_lock);
+ sfc_ev_qstop(sa->mgmt_evq);
+ rte_spinlock_unlock(&sa->mgmt_evq_lock);
+
+ efx_ev_fini(sa->nic);
+}
+
+int
+sfc_ev_qinit(struct sfc_adapter *sa,
+ enum sfc_evq_type type, unsigned int type_index,
+ unsigned int entries, int socket_id, struct sfc_evq **evqp)
+{
+ struct sfc_evq *evq;
+ int rc;
+
+ sfc_log_init(sa, "type=%s type_index=%u",
+ sfc_evq_type2str(type), type_index);
+
+ SFC_ASSERT(rte_is_power_of_2(entries));
+
+ rc = ENOMEM;
+ evq = rte_zmalloc_socket("sfc-evq", sizeof(*evq), RTE_CACHE_LINE_SIZE,
+ socket_id);
+ if (evq == NULL)
+ goto fail_evq_alloc;
+
+ evq->sa = sa;
+ evq->type = type;
+ evq->entries = entries;
+
+ /* Allocate DMA space */
+ rc = sfc_dma_alloc(sa, sfc_evq_type2str(type), type_index,
+ EFX_EVQ_SIZE(evq->entries), socket_id, &evq->mem);
+ if (rc != 0)
+ goto fail_dma_alloc;
+
+ evq->init_state = SFC_EVQ_INITIALIZED;
+
+ sa->evq_count++;
+
+ *evqp = evq;
+
+ return 0;
+
+fail_dma_alloc:
+ rte_free(evq);
+
+fail_evq_alloc:
+
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_ev_qfini(struct sfc_evq *evq)
+{
+ struct sfc_adapter *sa = evq->sa;
+
+ SFC_ASSERT(evq->init_state == SFC_EVQ_INITIALIZED);
+
+ sfc_dma_free(sa, &evq->mem);
+
+ rte_free(evq);
+
+ SFC_ASSERT(sa->evq_count > 0);
+ sa->evq_count--;
+}
+
+static int
+sfc_kvarg_perf_profile_handler(__rte_unused const char *key,
+ const char *value_str, void *opaque)
+{
+ uint64_t *value = opaque;
+
+ if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_THROUGHPUT) == 0)
+ *value = EFX_EVQ_FLAGS_TYPE_THROUGHPUT;
+ else if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_LOW_LATENCY) == 0)
+ *value = EFX_EVQ_FLAGS_TYPE_LOW_LATENCY;
+ else if (strcasecmp(value_str, SFC_KVARG_PERF_PROFILE_AUTO) == 0)
+ *value = EFX_EVQ_FLAGS_TYPE_AUTO;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+int
+sfc_ev_attach(struct sfc_adapter *sa)
+{
+ int rc;
+
+ sfc_log_init(sa, "entry");
+
+ sa->evq_flags = EFX_EVQ_FLAGS_TYPE_THROUGHPUT;
+ rc = sfc_kvargs_process(sa, SFC_KVARG_PERF_PROFILE,
+ sfc_kvarg_perf_profile_handler,
+ &sa->evq_flags);
+ if (rc != 0) {
+ sfc_err(sa, "invalid %s parameter value",
+ SFC_KVARG_PERF_PROFILE);
+ goto fail_kvarg_perf_profile;
+ }
+
+ sa->mgmt_evq_index = 0;
+ rte_spinlock_init(&sa->mgmt_evq_lock);
+
+ rc = sfc_ev_qinit(sa, SFC_EVQ_TYPE_MGMT, 0, SFC_MGMT_EVQ_ENTRIES,
+ sa->socket_id, &sa->mgmt_evq);
+ if (rc != 0)
+ goto fail_mgmt_evq_init;
+
+ /*
+ * Rx/Tx event queues are created/destroyed when corresponding
+ * Rx/Tx queue is created/destroyed.
+ */
+
+ return 0;
+
+fail_mgmt_evq_init:
+
+fail_kvarg_perf_profile:
+ sfc_log_init(sa, "failed %d", rc);
+ return rc;
+}
+
+void
+sfc_ev_detach(struct sfc_adapter *sa)
+{
+ sfc_log_init(sa, "entry");
+
+ sfc_ev_qfini(sa->mgmt_evq);
+
+ if (sa->evq_count != 0)
+ sfc_err(sa, "%u EvQs are not destroyed before detach",
+ sa->evq_count);
+}
Code Review / deb_dpdk.git / blobdiff