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38 * modification, are permitted provided that the following conditions
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42 * notice, this list of conditions and the following disclaimer.
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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 struct pci_device_list pci_device_list;
88 static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
90 struct rte_devargs *devargs;
92 TAILQ_FOREACH(devargs, &devargs_list, next) {
93 if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
94 devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
96 if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
102 /* map a particular resource from a file */
104 pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
105 int additional_flags)
109 /* Map the PCI memory resource of device */
110 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
111 MAP_SHARED | additional_flags, fd, offset);
112 if (mapaddr == MAP_FAILED) {
113 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
114 __func__, fd, requested_addr,
115 (unsigned long)size, (unsigned long)offset,
116 strerror(errno), mapaddr);
118 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
123 /* unmap a particular resource */
125 pci_unmap_resource(void *requested_addr, size_t size)
127 if (requested_addr == NULL)
130 /* Unmap the PCI memory resource of device */
131 if (munmap(requested_addr, size)) {
132 RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
133 __func__, requested_addr, (unsigned long)size,
136 RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
141 * If vendor/device ID match, call the devinit() function of the
145 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
148 const struct rte_pci_id *id_table;
150 for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
152 /* check if device's identifiers match the driver's ones */
153 if (id_table->vendor_id != dev->id.vendor_id &&
154 id_table->vendor_id != PCI_ANY_ID)
156 if (id_table->device_id != dev->id.device_id &&
157 id_table->device_id != PCI_ANY_ID)
159 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
160 id_table->subsystem_vendor_id != PCI_ANY_ID)
162 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
163 id_table->subsystem_device_id != PCI_ANY_ID)
166 struct rte_pci_addr *loc = &dev->addr;
168 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
169 loc->domain, loc->bus, loc->devid, loc->function,
172 RTE_LOG(DEBUG, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
173 dev->id.device_id, dr->name);
175 /* no initialization when blacklisted, return without error */
176 if (dev->devargs != NULL &&
177 dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
178 RTE_LOG(DEBUG, EAL, " Device is blacklisted, not initializing\n");
182 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
183 /* map resources for devices that use igb_uio */
184 ret = rte_eal_pci_map_device(dev);
187 } else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
188 rte_eal_process_type() == RTE_PROC_PRIMARY) {
189 /* unbind current driver */
190 if (pci_unbind_kernel_driver(dev) < 0)
194 /* reference driver structure */
197 /* call the driver devinit() function */
198 return dr->devinit(dr, dev);
200 /* return positive value if driver doesn't support this device */
205 * If vendor/device ID match, call the devuninit() function of the
209 rte_eal_pci_detach_dev(struct rte_pci_driver *dr,
210 struct rte_pci_device *dev)
212 const struct rte_pci_id *id_table;
214 if ((dr == NULL) || (dev == NULL))
217 for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
219 /* check if device's identifiers match the driver's ones */
220 if (id_table->vendor_id != dev->id.vendor_id &&
221 id_table->vendor_id != PCI_ANY_ID)
223 if (id_table->device_id != dev->id.device_id &&
224 id_table->device_id != PCI_ANY_ID)
226 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
227 id_table->subsystem_vendor_id != PCI_ANY_ID)
229 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
230 id_table->subsystem_device_id != PCI_ANY_ID)
233 struct rte_pci_addr *loc = &dev->addr;
235 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
236 loc->domain, loc->bus, loc->devid,
237 loc->function, dev->numa_node);
239 RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
240 dev->id.device_id, dr->name);
242 if (dr->devuninit && (dr->devuninit(dev) < 0))
243 return -1; /* negative value is an error */
245 /* clear driver structure */
248 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
249 /* unmap resources for devices that use igb_uio */
250 rte_eal_pci_unmap_device(dev);
255 /* return positive value if driver doesn't support this device */
260 * If vendor/device ID match, call the devinit() function of all
261 * registered driver for the given device. Return -1 if initialization
262 * failed, return 1 if no driver is found for this device.
265 pci_probe_all_drivers(struct rte_pci_device *dev)
267 struct rte_pci_driver *dr = NULL;
273 TAILQ_FOREACH(dr, &pci_driver_list, next) {
274 rc = rte_eal_pci_probe_one_driver(dr, dev);
276 /* negative value is an error */
279 /* positive value means driver doesn't support it */
287 * If vendor/device ID match, call the devuninit() function of all
288 * registered driver for the given device. Return -1 if initialization
289 * failed, return 1 if no driver is found for this device.
292 pci_detach_all_drivers(struct rte_pci_device *dev)
294 struct rte_pci_driver *dr = NULL;
300 TAILQ_FOREACH(dr, &pci_driver_list, next) {
301 rc = rte_eal_pci_detach_dev(dr, dev);
303 /* negative value is an error */
306 /* positive value means driver doesn't support it */
314 * Find the pci device specified by pci address, then invoke probe function of
315 * the driver of the devive.
318 rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
320 struct rte_pci_device *dev = NULL;
326 TAILQ_FOREACH(dev, &pci_device_list, next) {
327 if (rte_eal_compare_pci_addr(&dev->addr, addr))
330 ret = pci_probe_all_drivers(dev);
338 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
339 " cannot be used\n", dev->addr.domain, dev->addr.bus,
340 dev->addr.devid, dev->addr.function);
345 * Detach device specified by its pci address.
348 rte_eal_pci_detach(const struct rte_pci_addr *addr)
350 struct rte_pci_device *dev = NULL;
356 TAILQ_FOREACH(dev, &pci_device_list, next) {
357 if (rte_eal_compare_pci_addr(&dev->addr, addr))
360 ret = pci_detach_all_drivers(dev);
364 TAILQ_REMOVE(&pci_device_list, dev, next);
370 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
371 " cannot be used\n", dev->addr.domain, dev->addr.bus,
372 dev->addr.devid, dev->addr.function);
377 * Scan the content of the PCI bus, and call the devinit() function for
378 * all registered drivers that have a matching entry in its id_table
379 * for discovered devices.
382 rte_eal_pci_probe(void)
384 struct rte_pci_device *dev = NULL;
385 struct rte_devargs *devargs;
389 if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0)
392 TAILQ_FOREACH(dev, &pci_device_list, next) {
394 /* set devargs in PCI structure */
395 devargs = pci_devargs_lookup(dev);
397 dev->devargs = devargs;
399 /* probe all or only whitelisted devices */
401 ret = pci_probe_all_drivers(dev);
402 else if (devargs != NULL &&
403 devargs->type == RTE_DEVTYPE_WHITELISTED_PCI)
404 ret = pci_probe_all_drivers(dev);
406 rte_exit(EXIT_FAILURE, "Requested device " PCI_PRI_FMT
407 " cannot be used\n", dev->addr.domain, dev->addr.bus,
408 dev->addr.devid, dev->addr.function);
414 /* dump one device */
416 pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
420 fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
421 dev->addr.devid, dev->addr.function);
422 fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
425 for (i = 0; i != sizeof(dev->mem_resource) /
426 sizeof(dev->mem_resource[0]); i++) {
427 fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
428 dev->mem_resource[i].phys_addr,
429 dev->mem_resource[i].len);
434 /* dump devices on the bus */
436 rte_eal_pci_dump(FILE *f)
438 struct rte_pci_device *dev = NULL;
440 TAILQ_FOREACH(dev, &pci_device_list, next) {
441 pci_dump_one_device(f, dev);
445 /* register a driver */
447 rte_eal_pci_register(struct rte_pci_driver *driver)
449 TAILQ_INSERT_TAIL(&pci_driver_list, driver, next);
452 /* unregister a driver */
454 rte_eal_pci_unregister(struct rte_pci_driver *driver)
456 TAILQ_REMOVE(&pci_driver_list, driver, next);