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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
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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 struct pci_driver_list pci_driver_list =
88 TAILQ_HEAD_INITIALIZER(pci_driver_list);
89 struct pci_device_list pci_device_list =
90 TAILQ_HEAD_INITIALIZER(pci_device_list);
92 extern struct rte_pci_bus rte_pci_bus;
94 #define SYSFS_PCI_DEVICES "/sys/bus/pci/devices"
96 const char *pci_get_sysfs_path(void)
98 const char *path = NULL;
100 path = getenv("SYSFS_PCI_DEVICES");
102 return SYSFS_PCI_DEVICES;
107 static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
109 struct rte_devargs *devargs;
111 TAILQ_FOREACH(devargs, &devargs_list, next) {
112 if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
113 devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
115 if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
121 /* map a particular resource from a file */
123 pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
124 int additional_flags)
128 /* Map the PCI memory resource of device */
129 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
130 MAP_SHARED | additional_flags, fd, offset);
131 if (mapaddr == MAP_FAILED) {
132 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
133 __func__, fd, requested_addr,
134 (unsigned long)size, (unsigned long)offset,
135 strerror(errno), mapaddr);
137 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
142 /* unmap a particular resource */
144 pci_unmap_resource(void *requested_addr, size_t size)
146 if (requested_addr == NULL)
149 /* Unmap the PCI memory resource of device */
150 if (munmap(requested_addr, size)) {
151 RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
152 __func__, requested_addr, (unsigned long)size,
155 RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
160 * Match the PCI Driver and Device using the ID Table
163 * PCI driver from which ID table would be extracted
165 * PCI device to match against the driver
167 * 1 for successful match
168 * 0 for unsuccessful match
171 rte_pci_match(const struct rte_pci_driver *pci_drv,
172 const struct rte_pci_device *pci_dev)
174 const struct rte_pci_id *id_table;
176 for (id_table = pci_drv->id_table; id_table->vendor_id != 0;
178 /* check if device's identifiers match the driver's ones */
179 if (id_table->vendor_id != pci_dev->id.vendor_id &&
180 id_table->vendor_id != PCI_ANY_ID)
182 if (id_table->device_id != pci_dev->id.device_id &&
183 id_table->device_id != PCI_ANY_ID)
185 if (id_table->subsystem_vendor_id !=
186 pci_dev->id.subsystem_vendor_id &&
187 id_table->subsystem_vendor_id != PCI_ANY_ID)
189 if (id_table->subsystem_device_id !=
190 pci_dev->id.subsystem_device_id &&
191 id_table->subsystem_device_id != PCI_ANY_ID)
193 if (id_table->class_id != pci_dev->id.class_id &&
194 id_table->class_id != RTE_CLASS_ANY_ID)
204 * If vendor/device ID match, call the probe() function of the
208 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr,
209 struct rte_pci_device *dev)
212 struct rte_pci_addr *loc;
214 if ((dr == NULL) || (dev == NULL))
219 /* The device is not blacklisted; Check if driver supports it */
220 if (!rte_pci_match(dr, dev)) {
221 /* Match of device and driver failed */
222 RTE_LOG(DEBUG, EAL, "Driver (%s) doesn't match the device\n",
227 RTE_LOG(INFO, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
228 loc->domain, loc->bus, loc->devid, loc->function,
229 dev->device.numa_node);
231 /* no initialization when blacklisted, return without error */
232 if (dev->device.devargs != NULL &&
233 dev->device.devargs->type ==
234 RTE_DEVTYPE_BLACKLISTED_PCI) {
235 RTE_LOG(INFO, EAL, " Device is blacklisted, not"
240 RTE_LOG(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
241 dev->id.device_id, dr->driver.name);
243 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
244 /* map resources for devices that use igb_uio */
245 ret = rte_eal_pci_map_device(dev);
250 /* reference driver structure */
253 /* call the driver probe() function */
254 ret = dr->probe(dr, dev);
257 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
258 rte_eal_pci_unmap_device(dev);
265 * If vendor/device ID match, call the remove() function of the
269 rte_eal_pci_detach_dev(struct rte_pci_device *dev)
271 struct rte_pci_addr *loc;
272 struct rte_pci_driver *dr;
280 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
281 loc->domain, loc->bus, loc->devid,
282 loc->function, dev->device.numa_node);
284 RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
285 dev->id.device_id, dr->driver.name);
287 if (dr->remove && (dr->remove(dev) < 0))
288 return -1; /* negative value is an error */
290 /* clear driver structure */
293 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
294 /* unmap resources for devices that use igb_uio */
295 rte_eal_pci_unmap_device(dev);
301 * If vendor/device ID match, call the probe() function of all
302 * registered driver for the given device. Return -1 if initialization
303 * failed, return 1 if no driver is found for this device.
306 pci_probe_all_drivers(struct rte_pci_device *dev)
308 struct rte_pci_driver *dr = NULL;
314 /* Check if a driver is already loaded */
315 if (dev->driver != NULL)
318 TAILQ_FOREACH(dr, &pci_driver_list, next) {
319 rc = rte_eal_pci_probe_one_driver(dr, dev);
321 /* negative value is an error */
324 /* positive value means driver doesn't support it */
332 * Find the pci device specified by pci address, then invoke probe function of
333 * the driver of the devive.
336 rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
338 struct rte_pci_device *dev = NULL;
344 /* update current pci device in global list, kernel bindings might have
345 * changed since last time we looked at it.
347 if (pci_update_device(addr) < 0)
350 TAILQ_FOREACH(dev, &pci_device_list, next) {
351 if (rte_eal_compare_pci_addr(&dev->addr, addr))
354 ret = pci_probe_all_drivers(dev);
362 RTE_LOG(WARNING, EAL,
363 "Requested device " PCI_PRI_FMT " cannot be used\n",
364 addr->domain, addr->bus, addr->devid, addr->function);
369 * Detach device specified by its pci address.
372 rte_eal_pci_detach(const struct rte_pci_addr *addr)
374 struct rte_pci_device *dev = NULL;
380 TAILQ_FOREACH(dev, &pci_device_list, next) {
381 if (rte_eal_compare_pci_addr(&dev->addr, addr))
384 ret = rte_eal_pci_detach_dev(dev);
386 /* negative value is an error */
389 /* positive value means driver doesn't support it */
392 TAILQ_REMOVE(&pci_device_list, dev, next);
399 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
400 " cannot be used\n", dev->addr.domain, dev->addr.bus,
401 dev->addr.devid, dev->addr.function);
406 * Scan the content of the PCI bus, and call the probe() function for
407 * all registered drivers that have a matching entry in its id_table
408 * for discovered devices.
411 rte_eal_pci_probe(void)
413 struct rte_pci_device *dev = NULL;
414 size_t probed = 0, failed = 0;
415 struct rte_devargs *devargs;
419 if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0)
422 TAILQ_FOREACH(dev, &pci_device_list, next) {
425 /* set devargs in PCI structure */
426 devargs = pci_devargs_lookup(dev);
428 dev->device.devargs = devargs;
430 /* probe all or only whitelisted devices */
432 ret = pci_probe_all_drivers(dev);
433 else if (devargs != NULL &&
434 devargs->type == RTE_DEVTYPE_WHITELISTED_PCI)
435 ret = pci_probe_all_drivers(dev);
437 RTE_LOG(ERR, EAL, "Requested device " PCI_PRI_FMT
438 " cannot be used\n", dev->addr.domain, dev->addr.bus,
439 dev->addr.devid, dev->addr.function);
446 return (probed && probed == failed) ? -1 : 0;
449 /* dump one device */
451 pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
455 fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
456 dev->addr.devid, dev->addr.function);
457 fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
460 for (i = 0; i != sizeof(dev->mem_resource) /
461 sizeof(dev->mem_resource[0]); i++) {
462 fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
463 dev->mem_resource[i].phys_addr,
464 dev->mem_resource[i].len);
469 /* dump devices on the bus */
471 rte_eal_pci_dump(FILE *f)
473 struct rte_pci_device *dev = NULL;
475 TAILQ_FOREACH(dev, &pci_device_list, next) {
476 pci_dump_one_device(f, dev);
480 /* register a driver */
482 rte_eal_pci_register(struct rte_pci_driver *driver)
484 TAILQ_INSERT_TAIL(&pci_driver_list, driver, next);
485 rte_eal_driver_register(&driver->driver);
488 /* unregister a driver */
490 rte_eal_pci_unregister(struct rte_pci_driver *driver)
492 rte_eal_driver_unregister(&driver->driver);
493 TAILQ_REMOVE(&pci_driver_list, driver, next);
496 /* Add a device to PCI bus */
498 rte_eal_pci_add_device(struct rte_pci_device *pci_dev)
500 TAILQ_INSERT_TAIL(&rte_pci_bus.device_list, pci_dev, next);
503 /* Insert a device into a predefined position in PCI bus */
505 rte_eal_pci_insert_device(struct rte_pci_device *exist_pci_dev,
506 struct rte_pci_device *new_pci_dev)
508 TAILQ_INSERT_BEFORE(exist_pci_dev, new_pci_dev, next);
511 /* Remove a device from PCI bus */
513 rte_eal_pci_remove_device(struct rte_pci_device *pci_dev)
515 TAILQ_REMOVE(&rte_pci_bus.device_list, pci_dev, next);
518 struct rte_pci_bus rte_pci_bus = {
520 .scan = rte_eal_pci_scan,
521 .probe = rte_eal_pci_probe,
523 .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list),
524 .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list),
527 RTE_REGISTER_BUS(PCI_BUS_NAME, rte_pci_bus.bus);