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);
60 if (!sa->mgmt_evq_running) {
61 sfc_log_init(sa, "interrupt on not running management EVQ %u",
66 if (sfc_ev_qprime(evq) != 0)
67 sfc_err(sa, "cannot prime EVQ %u", evq->evq_index);
70 rte_spinlock_unlock(&sa->mgmt_evq_lock);
74 sfc_intr_line_handler(void *cb_arg)
76 struct sfc_adapter *sa = (struct sfc_adapter *)cb_arg;
77 efx_nic_t *enp = sa->nic;
80 unsigned int lsc_seq = sa->port.lsc_seq;
81 struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
83 sfc_log_init(sa, "entry");
85 if (sa->state != SFC_ADAPTER_STARTED &&
86 sa->state != SFC_ADAPTER_STARTING &&
87 sa->state != SFC_ADAPTER_STOPPING) {
89 "interrupt on stopped adapter, don't reenable");
93 efx_intr_status_line(enp, &fatal, &qmask);
95 (void)efx_intr_disable(enp);
96 (void)efx_intr_fatal(enp);
97 sfc_err(sa, "fatal, interrupts disabled");
101 if (qmask & (1 << sa->mgmt_evq_index))
102 sfc_intr_handle_mgmt_evq(sa);
104 if (rte_intr_enable(&pci_dev->intr_handle) != 0)
105 sfc_err(sa, "cannot reenable interrupts");
107 sfc_log_init(sa, "done");
110 if (lsc_seq != sa->port.lsc_seq) {
111 sfc_info(sa, "link status change event: link %s",
112 sa->eth_dev->data->dev_link.link_status ?
114 _rte_eth_dev_callback_process(sa->eth_dev,
115 RTE_ETH_EVENT_INTR_LSC,
121 sfc_intr_message_handler(void *cb_arg)
123 struct sfc_adapter *sa = (struct sfc_adapter *)cb_arg;
124 efx_nic_t *enp = sa->nic;
126 unsigned int lsc_seq = sa->port.lsc_seq;
127 struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
129 sfc_log_init(sa, "entry");
131 if (sa->state != SFC_ADAPTER_STARTED &&
132 sa->state != SFC_ADAPTER_STARTING &&
133 sa->state != SFC_ADAPTER_STOPPING) {
134 sfc_log_init(sa, "adapter not-started, don't reenable");
138 efx_intr_status_message(enp, sa->mgmt_evq_index, &fatal);
140 (void)efx_intr_disable(enp);
141 (void)efx_intr_fatal(enp);
142 sfc_err(sa, "fatal, interrupts disabled");
146 sfc_intr_handle_mgmt_evq(sa);
148 if (rte_intr_enable(&pci_dev->intr_handle) != 0)
149 sfc_err(sa, "cannot reenable interrupts");
151 sfc_log_init(sa, "done");
154 if (lsc_seq != sa->port.lsc_seq) {
155 sfc_info(sa, "link status change event");
156 _rte_eth_dev_callback_process(sa->eth_dev,
157 RTE_ETH_EVENT_INTR_LSC,
163 sfc_intr_start(struct sfc_adapter *sa)
165 struct sfc_intr *intr = &sa->intr;
166 struct rte_intr_handle *intr_handle;
167 struct rte_pci_device *pci_dev;
170 sfc_log_init(sa, "entry");
173 * The EFX common code event queue module depends on the interrupt
174 * module. Ensure that the interrupt module is always initialized
175 * (even if interrupts are not used). Status memory is required
176 * for Siena only and may be NULL for EF10.
178 sfc_log_init(sa, "efx_intr_init");
179 rc = efx_intr_init(sa->nic, intr->type, NULL);
183 pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
184 intr_handle = &pci_dev->intr_handle;
186 if (intr->handler != NULL) {
187 sfc_log_init(sa, "rte_intr_callback_register");
188 rc = rte_intr_callback_register(intr_handle, intr->handler,
192 "cannot register interrupt handler (rc=%d)",
195 * Convert error code from negative returned by RTE API
196 * to positive used in the driver.
199 goto fail_rte_intr_cb_reg;
202 sfc_log_init(sa, "rte_intr_enable");
203 rc = rte_intr_enable(intr_handle);
205 sfc_err(sa, "cannot enable interrupts (rc=%d)", rc);
207 * Convert error code from negative returned by RTE API
208 * to positive used in the driver.
211 goto fail_rte_intr_enable;
214 sfc_log_init(sa, "efx_intr_enable");
215 efx_intr_enable(sa->nic);
218 sfc_log_init(sa, "done type=%u max_intr=%d nb_efd=%u vec=%p",
219 intr_handle->type, intr_handle->max_intr,
220 intr_handle->nb_efd, intr_handle->intr_vec);
223 fail_rte_intr_enable:
224 rte_intr_callback_unregister(intr_handle, intr->handler, (void *)sa);
226 fail_rte_intr_cb_reg:
227 efx_intr_fini(sa->nic);
230 sfc_log_init(sa, "failed %d", rc);
235 sfc_intr_stop(struct sfc_adapter *sa)
237 struct sfc_intr *intr = &sa->intr;
238 struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
240 sfc_log_init(sa, "entry");
242 if (intr->handler != NULL) {
243 struct rte_intr_handle *intr_handle;
246 efx_intr_disable(sa->nic);
248 intr_handle = &pci_dev->intr_handle;
249 if (rte_intr_disable(intr_handle) != 0)
250 sfc_err(sa, "cannot disable interrupts");
252 while ((rc = rte_intr_callback_unregister(intr_handle,
253 intr->handler, (void *)sa)) == -EAGAIN)
257 "cannot unregister interrupt handler %d",
261 efx_intr_fini(sa->nic);
263 sfc_log_init(sa, "done");
267 sfc_intr_configure(struct sfc_adapter *sa)
269 struct sfc_intr *intr = &sa->intr;
271 sfc_log_init(sa, "entry");
273 intr->handler = NULL;
274 intr->lsc_intr = (sa->eth_dev->data->dev_conf.intr_conf.lsc != 0);
275 if (!intr->lsc_intr) {
276 sfc_info(sa, "LSC tracking using interrupts is disabled");
280 switch (intr->type) {
281 case EFX_INTR_MESSAGE:
282 intr->handler = sfc_intr_message_handler;
285 intr->handler = sfc_intr_line_handler;
287 case EFX_INTR_INVALID:
288 sfc_warn(sa, "interrupts are not supported");
291 sfc_panic(sa, "unexpected EFX interrupt type %u\n", intr->type);
296 sfc_log_init(sa, "done");
301 sfc_intr_close(struct sfc_adapter *sa)
303 sfc_log_init(sa, "entry");
305 sfc_log_init(sa, "done");
309 sfc_intr_attach(struct sfc_adapter *sa)
311 struct sfc_intr *intr = &sa->intr;
312 struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(sa->eth_dev);
314 sfc_log_init(sa, "entry");
316 switch (pci_dev->intr_handle.type) {
317 #ifdef RTE_EXEC_ENV_LINUXAPP
318 case RTE_INTR_HANDLE_UIO_INTX:
319 case RTE_INTR_HANDLE_VFIO_LEGACY:
320 intr->type = EFX_INTR_LINE;
322 case RTE_INTR_HANDLE_UIO:
323 case RTE_INTR_HANDLE_VFIO_MSI:
324 case RTE_INTR_HANDLE_VFIO_MSIX:
325 intr->type = EFX_INTR_MESSAGE;
329 intr->type = EFX_INTR_INVALID;
333 sfc_log_init(sa, "done");
338 sfc_intr_detach(struct sfc_adapter *sa)
340 sfc_log_init(sa, "entry");
342 sa->intr.type = EFX_INTR_INVALID;
344 sfc_log_init(sa, "done");