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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
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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
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61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
69 #include <sys/queue.h>
72 #include <rte_errno.h>
73 #include <rte_interrupts.h>
77 #include <rte_per_lcore.h>
78 #include <rte_memory.h>
79 #include <rte_memzone.h>
81 #include <rte_string_fns.h>
82 #include <rte_common.h>
83 #include <rte_devargs.h>
85 #include "eal_private.h"
87 extern struct rte_pci_bus rte_pci_bus;
89 #define SYSFS_PCI_DEVICES "/sys/bus/pci/devices"
91 const char *pci_get_sysfs_path(void)
93 const char *path = NULL;
95 path = getenv("SYSFS_PCI_DEVICES");
97 return SYSFS_PCI_DEVICES;
102 static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
104 struct rte_devargs *devargs;
106 TAILQ_FOREACH(devargs, &devargs_list, next) {
107 if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
108 devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
110 if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
116 /* map a particular resource from a file */
118 pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
119 int additional_flags)
123 /* Map the PCI memory resource of device */
124 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
125 MAP_SHARED | additional_flags, fd, offset);
126 if (mapaddr == MAP_FAILED) {
127 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
128 __func__, fd, requested_addr,
129 (unsigned long)size, (unsigned long)offset,
130 strerror(errno), mapaddr);
132 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
137 /* unmap a particular resource */
139 pci_unmap_resource(void *requested_addr, size_t size)
141 if (requested_addr == NULL)
144 /* Unmap the PCI memory resource of device */
145 if (munmap(requested_addr, size)) {
146 RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
147 __func__, requested_addr, (unsigned long)size,
150 RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
155 * Match the PCI Driver and Device using the ID Table
158 * PCI driver from which ID table would be extracted
160 * PCI device to match against the driver
162 * 1 for successful match
163 * 0 for unsuccessful match
166 rte_pci_match(const struct rte_pci_driver *pci_drv,
167 const struct rte_pci_device *pci_dev)
169 const struct rte_pci_id *id_table;
171 for (id_table = pci_drv->id_table; id_table->vendor_id != 0;
173 /* check if device's identifiers match the driver's ones */
174 if (id_table->vendor_id != pci_dev->id.vendor_id &&
175 id_table->vendor_id != PCI_ANY_ID)
177 if (id_table->device_id != pci_dev->id.device_id &&
178 id_table->device_id != PCI_ANY_ID)
180 if (id_table->subsystem_vendor_id !=
181 pci_dev->id.subsystem_vendor_id &&
182 id_table->subsystem_vendor_id != PCI_ANY_ID)
184 if (id_table->subsystem_device_id !=
185 pci_dev->id.subsystem_device_id &&
186 id_table->subsystem_device_id != PCI_ANY_ID)
188 if (id_table->class_id != pci_dev->id.class_id &&
189 id_table->class_id != RTE_CLASS_ANY_ID)
199 * If vendor/device ID match, call the probe() function of the
203 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr,
204 struct rte_pci_device *dev)
207 struct rte_pci_addr *loc;
209 if ((dr == NULL) || (dev == NULL))
214 /* The device is not blacklisted; Check if driver supports it */
215 if (!rte_pci_match(dr, dev)) {
216 /* Match of device and driver failed */
217 RTE_LOG(DEBUG, EAL, "Driver (%s) doesn't match the device\n",
222 RTE_LOG(INFO, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
223 loc->domain, loc->bus, loc->devid, loc->function,
224 dev->device.numa_node);
226 /* no initialization when blacklisted, return without error */
227 if (dev->device.devargs != NULL &&
228 dev->device.devargs->type ==
229 RTE_DEVTYPE_BLACKLISTED_PCI) {
230 RTE_LOG(INFO, EAL, " Device is blacklisted, not"
235 RTE_LOG(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
236 dev->id.device_id, dr->driver.name);
238 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
239 /* map resources for devices that use igb_uio */
240 ret = rte_eal_pci_map_device(dev);
245 /* reference driver structure */
248 /* call the driver probe() function */
249 ret = dr->probe(dr, dev);
252 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
253 rte_eal_pci_unmap_device(dev);
260 * If vendor/device ID match, call the remove() function of the
264 rte_eal_pci_detach_dev(struct rte_pci_device *dev)
266 struct rte_pci_addr *loc;
267 struct rte_pci_driver *dr;
275 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
276 loc->domain, loc->bus, loc->devid,
277 loc->function, dev->device.numa_node);
279 RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
280 dev->id.device_id, dr->driver.name);
282 if (dr->remove && (dr->remove(dev) < 0))
283 return -1; /* negative value is an error */
285 /* clear driver structure */
288 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
289 /* unmap resources for devices that use igb_uio */
290 rte_eal_pci_unmap_device(dev);
296 * If vendor/device ID match, call the probe() function of all
297 * registered driver for the given device. Return -1 if initialization
298 * failed, return 1 if no driver is found for this device.
301 pci_probe_all_drivers(struct rte_pci_device *dev)
303 struct rte_pci_driver *dr = NULL;
309 /* Check if a driver is already loaded */
310 if (dev->driver != NULL)
313 FOREACH_DRIVER_ON_PCIBUS(dr) {
314 rc = rte_eal_pci_probe_one_driver(dr, dev);
316 /* negative value is an error */
319 /* positive value means driver doesn't support it */
327 * Find the pci device specified by pci address, then invoke probe function of
328 * the driver of the devive.
331 rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
333 struct rte_pci_device *dev = NULL;
340 /* update current pci device in global list, kernel bindings might have
341 * changed since last time we looked at it.
343 if (pci_update_device(addr) < 0)
346 FOREACH_DEVICE_ON_PCIBUS(dev) {
347 if (rte_eal_compare_pci_addr(&dev->addr, addr))
350 ret = pci_probe_all_drivers(dev);
358 RTE_LOG(WARNING, EAL,
359 "Requested device " PCI_PRI_FMT " cannot be used\n",
360 addr->domain, addr->bus, addr->devid, addr->function);
365 * Detach device specified by its pci address.
368 rte_eal_pci_detach(const struct rte_pci_addr *addr)
370 struct rte_pci_device *dev = NULL;
376 FOREACH_DEVICE_ON_PCIBUS(dev) {
377 if (rte_eal_compare_pci_addr(&dev->addr, addr))
380 ret = rte_eal_pci_detach_dev(dev);
382 /* negative value is an error */
385 /* positive value means driver doesn't support it */
388 rte_eal_pci_remove_device(dev);
395 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
396 " cannot be used\n", dev->addr.domain, dev->addr.bus,
397 dev->addr.devid, dev->addr.function);
402 * Scan the content of the PCI bus, and call the probe() function for
403 * all registered drivers that have a matching entry in its id_table
404 * for discovered devices.
407 rte_eal_pci_probe(void)
409 struct rte_pci_device *dev = NULL;
410 size_t probed = 0, failed = 0;
411 struct rte_devargs *devargs;
415 if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0)
418 FOREACH_DEVICE_ON_PCIBUS(dev) {
421 /* set devargs in PCI structure */
422 devargs = pci_devargs_lookup(dev);
424 dev->device.devargs = devargs;
426 /* probe all or only whitelisted devices */
428 ret = pci_probe_all_drivers(dev);
429 else if (devargs != NULL &&
430 devargs->type == RTE_DEVTYPE_WHITELISTED_PCI)
431 ret = pci_probe_all_drivers(dev);
433 RTE_LOG(ERR, EAL, "Requested device " PCI_PRI_FMT
434 " cannot be used\n", dev->addr.domain, dev->addr.bus,
435 dev->addr.devid, dev->addr.function);
442 return (probed && probed == failed) ? -1 : 0;
445 /* dump one device */
447 pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
451 fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
452 dev->addr.devid, dev->addr.function);
453 fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
456 for (i = 0; i != sizeof(dev->mem_resource) /
457 sizeof(dev->mem_resource[0]); i++) {
458 fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
459 dev->mem_resource[i].phys_addr,
460 dev->mem_resource[i].len);
465 /* dump devices on the bus */
467 rte_eal_pci_dump(FILE *f)
469 struct rte_pci_device *dev = NULL;
471 FOREACH_DEVICE_ON_PCIBUS(dev) {
472 pci_dump_one_device(f, dev);
476 /* register a driver */
478 rte_eal_pci_register(struct rte_pci_driver *driver)
480 TAILQ_INSERT_TAIL(&rte_pci_bus.driver_list, driver, next);
481 driver->bus = &rte_pci_bus;
484 /* unregister a driver */
486 rte_eal_pci_unregister(struct rte_pci_driver *driver)
488 TAILQ_REMOVE(&rte_pci_bus.driver_list, driver, next);
492 /* Add a device to PCI bus */
494 rte_eal_pci_add_device(struct rte_pci_device *pci_dev)
496 TAILQ_INSERT_TAIL(&rte_pci_bus.device_list, pci_dev, next);
499 /* Insert a device into a predefined position in PCI bus */
501 rte_eal_pci_insert_device(struct rte_pci_device *exist_pci_dev,
502 struct rte_pci_device *new_pci_dev)
504 TAILQ_INSERT_BEFORE(exist_pci_dev, new_pci_dev, next);
507 /* Remove a device from PCI bus */
509 rte_eal_pci_remove_device(struct rte_pci_device *pci_dev)
511 TAILQ_REMOVE(&rte_pci_bus.device_list, pci_dev, next);
514 struct rte_pci_bus rte_pci_bus = {
516 .scan = rte_eal_pci_scan,
517 .probe = rte_eal_pci_probe,
519 .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
520 .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),
523 RTE_REGISTER_BUS(PCI_BUS_NAME, rte_pci_bus.bus);