4 * Copyright (c) 2016-2017 Solarflare Communications Inc.
7 * This software was jointly developed between OKTET Labs (under contract
8 * for Solarflare) and Solarflare Communications, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions are met:
13 * 1. Redistributions of source code must retain the above copyright notice,
14 * this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
29 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * At the momemt of writing DPDK v16.07 has notion of two types of
34 * interrupts: LSC (link status change) and RXQ (receive indication).
35 * It allows to register interrupt callback for entire device which is
36 * not intended to be used for receive indication (i.e. link status
37 * change indication only). The handler has no information which HW
38 * interrupt has triggered it, so we don't know which event queue should
39 * be polled/reprimed (except qmask in the case of legacy line interrupt).
42 #include <rte_common.h>
43 #include <rte_interrupts.h>
52 sfc_intr_handle_mgmt_evq(struct sfc_adapter *sa)
56 rte_spinlock_lock(&sa->mgmt_evq_lock);
58 evq = sa->evq_info[sa->mgmt_evq_index].evq;
60 if (evq->init_state != SFC_EVQ_STARTED) {
61 sfc_log_init(sa, "interrupt on stopped EVQ %u", evq->evq_index);
65 if (sfc_ev_qprime(evq) != 0)
66 sfc_err(sa, "cannot prime EVQ %u", evq->evq_index);
69 rte_spinlock_unlock(&sa->mgmt_evq_lock);
73 sfc_intr_line_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
75 struct sfc_adapter *sa = (struct sfc_adapter *)cb_arg;
76 efx_nic_t *enp = sa->nic;
79 unsigned int lsc_seq = sa->port.lsc_seq;
81 sfc_log_init(sa, "entry");
83 if (sa->state != SFC_ADAPTER_STARTED &&
84 sa->state != SFC_ADAPTER_STARTING &&
85 sa->state != SFC_ADAPTER_STOPPING) {
87 "interrupt on stopped adapter, don't reenable");
91 efx_intr_status_line(enp, &fatal, &qmask);
93 (void)efx_intr_disable(enp);
94 (void)efx_intr_fatal(enp);
95 sfc_err(sa, "fatal, interrupts disabled");
99 if (qmask & (1 << sa->mgmt_evq_index))
100 sfc_intr_handle_mgmt_evq(sa);
102 if (rte_intr_enable(intr_handle) != 0)
103 sfc_err(sa, "cannot reenable interrupts");
105 sfc_log_init(sa, "done");
108 if (lsc_seq != sa->port.lsc_seq) {
109 sfc_info(sa, "link status change event: link %s",
110 sa->eth_dev->data->dev_link.link_status ?
112 _rte_eth_dev_callback_process(sa->eth_dev,
113 RTE_ETH_EVENT_INTR_LSC, NULL);
118 sfc_intr_message_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
120 struct sfc_adapter *sa = (struct sfc_adapter *)cb_arg;
121 efx_nic_t *enp = sa->nic;
123 unsigned int lsc_seq = sa->port.lsc_seq;
125 sfc_log_init(sa, "entry");
127 if (sa->state != SFC_ADAPTER_STARTED &&
128 sa->state != SFC_ADAPTER_STARTING &&
129 sa->state != SFC_ADAPTER_STOPPING) {
130 sfc_log_init(sa, "adapter not-started, don't reenable");
134 efx_intr_status_message(enp, sa->mgmt_evq_index, &fatal);
136 (void)efx_intr_disable(enp);
137 (void)efx_intr_fatal(enp);
138 sfc_err(sa, "fatal, interrupts disabled");
142 sfc_intr_handle_mgmt_evq(sa);
144 if (rte_intr_enable(intr_handle) != 0)
145 sfc_err(sa, "cannot reenable interrupts");
147 sfc_log_init(sa, "done");
150 if (lsc_seq != sa->port.lsc_seq) {
151 sfc_info(sa, "link status change event");
152 _rte_eth_dev_callback_process(sa->eth_dev,
153 RTE_ETH_EVENT_INTR_LSC, NULL);
158 sfc_intr_start(struct sfc_adapter *sa)
160 struct sfc_intr *intr = &sa->intr;
161 struct rte_intr_handle *intr_handle;
162 struct rte_pci_device *pci_dev;
165 sfc_log_init(sa, "entry");
168 * The EFX common code event queue module depends on the interrupt
169 * module. Ensure that the interrupt module is always initialized
170 * (even if interrupts are not used). Status memory is required
171 * for Siena only and may be NULL for EF10.
173 sfc_log_init(sa, "efx_intr_init");
174 rc = efx_intr_init(sa->nic, intr->type, NULL);
178 pci_dev = SFC_DEV_TO_PCI(sa->eth_dev);
179 intr_handle = &pci_dev->intr_handle;
181 if (intr->handler != NULL) {
182 sfc_log_init(sa, "rte_intr_callback_register");
183 rc = rte_intr_callback_register(intr_handle, intr->handler,
187 "cannot register interrupt handler (rc=%d)",
190 * Convert error code from negative returned by RTE API
191 * to positive used in the driver.
194 goto fail_rte_intr_cb_reg;
197 sfc_log_init(sa, "rte_intr_enable");
198 rc = rte_intr_enable(intr_handle);
200 sfc_err(sa, "cannot enable interrupts (rc=%d)", rc);
202 * Convert error code from negative returned by RTE API
203 * to positive used in the driver.
206 goto fail_rte_intr_enable;
209 sfc_log_init(sa, "efx_intr_enable");
210 efx_intr_enable(sa->nic);
213 sfc_log_init(sa, "done type=%u max_intr=%d nb_efd=%u vec=%p",
214 intr_handle->type, intr_handle->max_intr,
215 intr_handle->nb_efd, intr_handle->intr_vec);
218 fail_rte_intr_enable:
219 rte_intr_callback_unregister(intr_handle, intr->handler, (void *)sa);
221 fail_rte_intr_cb_reg:
222 efx_intr_fini(sa->nic);
225 sfc_log_init(sa, "failed %d", rc);
230 sfc_intr_stop(struct sfc_adapter *sa)
232 struct sfc_intr *intr = &sa->intr;
233 struct rte_pci_device *pci_dev = SFC_DEV_TO_PCI(sa->eth_dev);
235 sfc_log_init(sa, "entry");
237 if (intr->handler != NULL) {
238 struct rte_intr_handle *intr_handle;
241 efx_intr_disable(sa->nic);
243 intr_handle = &pci_dev->intr_handle;
244 if (rte_intr_disable(intr_handle) != 0)
245 sfc_err(sa, "cannot disable interrupts");
247 while ((rc = rte_intr_callback_unregister(intr_handle,
248 intr->handler, (void *)sa)) == -EAGAIN)
252 "cannot unregister interrupt handler %d",
256 efx_intr_fini(sa->nic);
258 sfc_log_init(sa, "done");
262 sfc_intr_init(struct sfc_adapter *sa)
264 struct sfc_intr *intr = &sa->intr;
266 sfc_log_init(sa, "entry");
268 intr->handler = NULL;
269 intr->lsc_intr = (sa->eth_dev->data->dev_conf.intr_conf.lsc != 0);
270 if (!intr->lsc_intr) {
271 sfc_info(sa, "LSC tracking using interrupts is disabled");
275 switch (intr->type) {
276 case EFX_INTR_MESSAGE:
277 intr->handler = sfc_intr_message_handler;
280 intr->handler = sfc_intr_line_handler;
282 case EFX_INTR_INVALID:
283 sfc_warn(sa, "interrupts are not supported");
286 sfc_panic(sa, "unexpected EFX interrupt type %u\n", intr->type);
291 sfc_log_init(sa, "done");
296 sfc_intr_fini(struct sfc_adapter *sa)
298 sfc_log_init(sa, "entry");
300 sfc_log_init(sa, "done");
304 sfc_intr_attach(struct sfc_adapter *sa)
306 struct sfc_intr *intr = &sa->intr;
307 struct rte_pci_device *pci_dev = SFC_DEV_TO_PCI(sa->eth_dev);
309 sfc_log_init(sa, "entry");
311 switch (pci_dev->intr_handle.type) {
312 #ifdef RTE_EXEC_ENV_LINUXAPP
313 case RTE_INTR_HANDLE_VFIO_LEGACY:
314 intr->type = EFX_INTR_LINE;
316 case RTE_INTR_HANDLE_VFIO_MSI:
317 case RTE_INTR_HANDLE_VFIO_MSIX:
318 intr->type = EFX_INTR_MESSAGE;
322 intr->type = EFX_INTR_INVALID;
326 sfc_log_init(sa, "done");
331 sfc_intr_detach(struct sfc_adapter *sa)
333 sfc_log_init(sa, "entry");
335 sa->intr.type = EFX_INTR_INVALID;
337 sfc_log_init(sa, "done");