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35 * Copyright 2013-2014 6WIND S.A.
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38 * modification, are permitted provided that the following conditions
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49 * from this software without specific prior written permission.
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
69 #include <sys/queue.h>
72 #include <rte_interrupts.h>
75 #include <rte_per_lcore.h>
76 #include <rte_memory.h>
77 #include <rte_memzone.h>
79 #include <rte_string_fns.h>
80 #include <rte_common.h>
81 #include <rte_devargs.h>
83 #include "eal_private.h"
85 struct pci_driver_list pci_driver_list =
86 TAILQ_HEAD_INITIALIZER(pci_driver_list);
87 struct pci_device_list pci_device_list =
88 TAILQ_HEAD_INITIALIZER(pci_device_list);
90 #define SYSFS_PCI_DEVICES "/sys/bus/pci/devices"
92 const char *pci_get_sysfs_path(void)
94 const char *path = NULL;
96 path = getenv("SYSFS_PCI_DEVICES");
98 return SYSFS_PCI_DEVICES;
103 static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
105 struct rte_devargs *devargs;
107 TAILQ_FOREACH(devargs, &devargs_list, next) {
108 if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
109 devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
111 if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
117 /* map a particular resource from a file */
119 pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
120 int additional_flags)
124 /* Map the PCI memory resource of device */
125 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
126 MAP_SHARED | additional_flags, fd, offset);
127 if (mapaddr == MAP_FAILED) {
128 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
129 __func__, fd, requested_addr,
130 (unsigned long)size, (unsigned long)offset,
131 strerror(errno), mapaddr);
133 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
138 /* unmap a particular resource */
140 pci_unmap_resource(void *requested_addr, size_t size)
142 if (requested_addr == NULL)
145 /* Unmap the PCI memory resource of device */
146 if (munmap(requested_addr, size)) {
147 RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
148 __func__, requested_addr, (unsigned long)size,
151 RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
156 * If vendor/device ID match, call the probe() function of the
160 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
163 const struct rte_pci_id *id_table;
165 for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
167 /* check if device's identifiers match the driver's ones */
168 if (id_table->vendor_id != dev->id.vendor_id &&
169 id_table->vendor_id != PCI_ANY_ID)
171 if (id_table->device_id != dev->id.device_id &&
172 id_table->device_id != PCI_ANY_ID)
174 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
175 id_table->subsystem_vendor_id != PCI_ANY_ID)
177 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
178 id_table->subsystem_device_id != PCI_ANY_ID)
180 if (id_table->class_id != dev->id.class_id &&
181 id_table->class_id != RTE_CLASS_ANY_ID)
184 struct rte_pci_addr *loc = &dev->addr;
186 RTE_LOG(INFO, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
187 loc->domain, loc->bus, loc->devid, loc->function,
188 dev->device.numa_node);
190 /* no initialization when blacklisted, return without error */
191 if (dev->device.devargs != NULL &&
192 dev->device.devargs->type ==
193 RTE_DEVTYPE_BLACKLISTED_PCI) {
194 RTE_LOG(INFO, EAL, " Device is blacklisted, not initializing\n");
198 RTE_LOG(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
199 dev->id.device_id, dr->driver.name);
201 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
202 /* map resources for devices that use igb_uio */
203 ret = rte_eal_pci_map_device(dev);
208 /* reference driver structure */
211 /* call the driver probe() function */
212 ret = dr->probe(dr, dev);
215 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
216 rte_eal_pci_unmap_device(dev);
221 /* return positive value if driver doesn't support this device */
226 * If vendor/device ID match, call the remove() function of the
230 rte_eal_pci_detach_dev(struct rte_pci_driver *dr,
231 struct rte_pci_device *dev)
233 const struct rte_pci_id *id_table;
235 if ((dr == NULL) || (dev == NULL))
238 for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
240 /* check if device's identifiers match the driver's ones */
241 if (id_table->vendor_id != dev->id.vendor_id &&
242 id_table->vendor_id != PCI_ANY_ID)
244 if (id_table->device_id != dev->id.device_id &&
245 id_table->device_id != PCI_ANY_ID)
247 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
248 id_table->subsystem_vendor_id != PCI_ANY_ID)
250 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
251 id_table->subsystem_device_id != PCI_ANY_ID)
254 struct rte_pci_addr *loc = &dev->addr;
256 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
257 loc->domain, loc->bus, loc->devid,
258 loc->function, dev->device.numa_node);
260 RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
261 dev->id.device_id, dr->driver.name);
263 if (dr->remove && (dr->remove(dev) < 0))
264 return -1; /* negative value is an error */
266 /* clear driver structure */
269 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
270 /* unmap resources for devices that use igb_uio */
271 rte_eal_pci_unmap_device(dev);
276 /* return positive value if driver doesn't support this device */
281 * If vendor/device ID match, call the probe() function of all
282 * registered driver for the given device. Return -1 if initialization
283 * failed, return 1 if no driver is found for this device.
286 pci_probe_all_drivers(struct rte_pci_device *dev)
288 struct rte_pci_driver *dr = NULL;
294 /* Check if a driver is already loaded */
295 if (dev->driver != NULL)
298 TAILQ_FOREACH(dr, &pci_driver_list, next) {
299 rc = rte_eal_pci_probe_one_driver(dr, dev);
301 /* negative value is an error */
304 /* positive value means driver doesn't support it */
312 * If vendor/device ID match, call the remove() function of all
313 * registered driver for the given device. Return -1 if initialization
314 * failed, return 1 if no driver is found for this device.
317 pci_detach_all_drivers(struct rte_pci_device *dev)
319 struct rte_pci_driver *dr = NULL;
325 TAILQ_FOREACH(dr, &pci_driver_list, next) {
326 rc = rte_eal_pci_detach_dev(dr, dev);
328 /* negative value is an error */
331 /* positive value means driver doesn't support it */
339 * Find the pci device specified by pci address, then invoke probe function of
340 * the driver of the devive.
343 rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
345 struct rte_pci_device *dev = NULL;
351 /* update current pci device in global list, kernel bindings might have
352 * changed since last time we looked at it.
354 if (pci_update_device(addr) < 0)
357 TAILQ_FOREACH(dev, &pci_device_list, next) {
358 if (rte_eal_compare_pci_addr(&dev->addr, addr))
361 ret = pci_probe_all_drivers(dev);
369 RTE_LOG(WARNING, EAL,
370 "Requested device " PCI_PRI_FMT " cannot be used\n",
371 addr->domain, addr->bus, addr->devid, addr->function);
376 * Detach device specified by its pci address.
379 rte_eal_pci_detach(const struct rte_pci_addr *addr)
381 struct rte_pci_device *dev = NULL;
387 TAILQ_FOREACH(dev, &pci_device_list, next) {
388 if (rte_eal_compare_pci_addr(&dev->addr, addr))
391 ret = pci_detach_all_drivers(dev);
395 TAILQ_REMOVE(&pci_device_list, dev, next);
402 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
403 " cannot be used\n", dev->addr.domain, dev->addr.bus,
404 dev->addr.devid, dev->addr.function);
409 * Scan the content of the PCI bus, and call the probe() function for
410 * all registered drivers that have a matching entry in its id_table
411 * for discovered devices.
414 rte_eal_pci_probe(void)
416 struct rte_pci_device *dev = NULL;
417 struct rte_devargs *devargs;
421 if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0)
424 TAILQ_FOREACH(dev, &pci_device_list, next) {
426 /* set devargs in PCI structure */
427 devargs = pci_devargs_lookup(dev);
429 dev->device.devargs = devargs;
431 /* probe all or only whitelisted devices */
433 ret = pci_probe_all_drivers(dev);
434 else if (devargs != NULL &&
435 devargs->type == RTE_DEVTYPE_WHITELISTED_PCI)
436 ret = pci_probe_all_drivers(dev);
438 rte_exit(EXIT_FAILURE, "Requested device " PCI_PRI_FMT
439 " cannot be used\n", dev->addr.domain, dev->addr.bus,
440 dev->addr.devid, dev->addr.function);
446 /* dump one device */
448 pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
452 fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
453 dev->addr.devid, dev->addr.function);
454 fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
457 for (i = 0; i != sizeof(dev->mem_resource) /
458 sizeof(dev->mem_resource[0]); i++) {
459 fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
460 dev->mem_resource[i].phys_addr,
461 dev->mem_resource[i].len);
466 /* dump devices on the bus */
468 rte_eal_pci_dump(FILE *f)
470 struct rte_pci_device *dev = NULL;
472 TAILQ_FOREACH(dev, &pci_device_list, next) {
473 pci_dump_one_device(f, dev);
477 /* register a driver */
479 rte_eal_pci_register(struct rte_pci_driver *driver)
481 TAILQ_INSERT_TAIL(&pci_driver_list, driver, next);
482 rte_eal_driver_register(&driver->driver);
485 /* unregister a driver */
487 rte_eal_pci_unregister(struct rte_pci_driver *driver)
489 rte_eal_driver_unregister(&driver->driver);
490 TAILQ_REMOVE(&pci_driver_list, driver, next);