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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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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 #ifdef RTE_PCI_CONFIG
185 * Set PCIe config space for high performance.
186 * Return value can be ignored.
188 pci_config_space_set(dev);
190 /* map resources for devices that use igb_uio */
191 ret = pci_map_device(dev);
194 } else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
195 rte_eal_process_type() == RTE_PROC_PRIMARY) {
196 /* unbind current driver */
197 if (pci_unbind_kernel_driver(dev) < 0)
201 /* reference driver structure */
204 /* call the driver devinit() function */
205 return dr->devinit(dr, dev);
207 /* return positive value if driver is not found */
212 * If vendor/device ID match, call the devuninit() function of the
216 rte_eal_pci_detach_dev(struct rte_pci_driver *dr,
217 struct rte_pci_device *dev)
219 const struct rte_pci_id *id_table;
221 if ((dr == NULL) || (dev == NULL))
224 for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
226 /* check if device's identifiers match the driver's ones */
227 if (id_table->vendor_id != dev->id.vendor_id &&
228 id_table->vendor_id != PCI_ANY_ID)
230 if (id_table->device_id != dev->id.device_id &&
231 id_table->device_id != PCI_ANY_ID)
233 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
234 id_table->subsystem_vendor_id != PCI_ANY_ID)
236 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
237 id_table->subsystem_device_id != PCI_ANY_ID)
240 struct rte_pci_addr *loc = &dev->addr;
242 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
243 loc->domain, loc->bus, loc->devid,
244 loc->function, dev->numa_node);
246 RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
247 dev->id.device_id, dr->name);
249 if (dr->devuninit && (dr->devuninit(dev) < 0))
250 return -1; /* negative value is an error */
252 /* clear driver structure */
255 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
256 /* unmap resources for devices that use igb_uio */
257 pci_unmap_device(dev);
262 /* return positive value if driver is not found */
267 * If vendor/device ID match, call the devinit() function of all
268 * registered driver for the given device. Return -1 if initialization
269 * failed, return 1 if no driver is found for this device.
272 pci_probe_all_drivers(struct rte_pci_device *dev)
274 struct rte_pci_driver *dr = NULL;
280 TAILQ_FOREACH(dr, &pci_driver_list, next) {
281 rc = rte_eal_pci_probe_one_driver(dr, dev);
283 /* negative value is an error */
286 /* positive value means driver not found */
294 * If vendor/device ID match, call the devuninit() function of all
295 * registered driver for the given device. Return -1 if initialization
296 * failed, return 1 if no driver is found for this device.
299 pci_detach_all_drivers(struct rte_pci_device *dev)
301 struct rte_pci_driver *dr = NULL;
307 TAILQ_FOREACH(dr, &pci_driver_list, next) {
308 rc = rte_eal_pci_detach_dev(dr, dev);
310 /* negative value is an error */
313 /* positive value means driver not found */
321 * Find the pci device specified by pci address, then invoke probe function of
322 * the driver of the devive.
325 rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
327 struct rte_pci_device *dev = NULL;
333 TAILQ_FOREACH(dev, &pci_device_list, next) {
334 if (rte_eal_compare_pci_addr(&dev->addr, addr))
337 ret = pci_probe_all_drivers(dev);
345 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
346 " cannot be used\n", dev->addr.domain, dev->addr.bus,
347 dev->addr.devid, dev->addr.function);
352 * Detach device specified by its pci address.
355 rte_eal_pci_detach(const struct rte_pci_addr *addr)
357 struct rte_pci_device *dev = NULL;
363 TAILQ_FOREACH(dev, &pci_device_list, next) {
364 if (rte_eal_compare_pci_addr(&dev->addr, addr))
367 ret = pci_detach_all_drivers(dev);
371 TAILQ_REMOVE(&pci_device_list, dev, next);
377 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
378 " cannot be used\n", dev->addr.domain, dev->addr.bus,
379 dev->addr.devid, dev->addr.function);
384 * Scan the content of the PCI bus, and call the devinit() function for
385 * all registered drivers that have a matching entry in its id_table
386 * for discovered devices.
389 rte_eal_pci_probe(void)
391 struct rte_pci_device *dev = NULL;
392 struct rte_devargs *devargs;
396 if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0)
399 TAILQ_FOREACH(dev, &pci_device_list, next) {
401 /* set devargs in PCI structure */
402 devargs = pci_devargs_lookup(dev);
404 dev->devargs = devargs;
406 /* probe all or only whitelisted devices */
408 ret = pci_probe_all_drivers(dev);
409 else if (devargs != NULL &&
410 devargs->type == RTE_DEVTYPE_WHITELISTED_PCI)
411 ret = pci_probe_all_drivers(dev);
413 rte_exit(EXIT_FAILURE, "Requested device " PCI_PRI_FMT
414 " cannot be used\n", dev->addr.domain, dev->addr.bus,
415 dev->addr.devid, dev->addr.function);
421 /* dump one device */
423 pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
427 fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
428 dev->addr.devid, dev->addr.function);
429 fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
432 for (i = 0; i != sizeof(dev->mem_resource) /
433 sizeof(dev->mem_resource[0]); i++) {
434 fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
435 dev->mem_resource[i].phys_addr,
436 dev->mem_resource[i].len);
441 /* dump devices on the bus */
443 rte_eal_pci_dump(FILE *f)
445 struct rte_pci_device *dev = NULL;
447 TAILQ_FOREACH(dev, &pci_device_list, next) {
448 pci_dump_one_device(f, dev);
452 /* register a driver */
454 rte_eal_pci_register(struct rte_pci_driver *driver)
456 TAILQ_INSERT_TAIL(&pci_driver_list, driver, next);
459 /* unregister a driver */
461 rte_eal_pci_unregister(struct rte_pci_driver *driver)
463 TAILQ_REMOVE(&pci_driver_list, driver, next);