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8 * modification, are permitted provided that the following conditions
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41 #include <sys/types.h>
48 #include <sys/queue.h>
50 #include <sys/ioctl.h>
52 #include <rte_interrupts.h>
55 #include <rte_common.h>
56 #include <rte_launch.h>
57 #include <rte_memory.h>
58 #include <rte_memzone.h>
59 #include <rte_tailq.h>
61 #include <rte_eal_memconfig.h>
62 #include <rte_per_lcore.h>
63 #include <rte_lcore.h>
64 #include <rte_malloc.h>
65 #include <rte_string_fns.h>
66 #include <rte_debug.h>
67 #include <rte_devargs.h>
69 #include "rte_pci_dev_ids.h"
70 #include "eal_filesystem.h"
71 #include "eal_private.h"
75 * PCI probing under linux
77 * This code is used to simulate a PCI probe by parsing information in
78 * sysfs. Moreover, when a registered driver matches a device, the
79 * kernel driver currently using it is unloaded and replaced by
80 * igb_uio module, which is a very minimal userland driver for Intel
81 * network card, only providing access to PCI BAR to applications, and
82 * enabling bus master.
93 * For multi-process we need to reproduce all PCI mappings in secondary
94 * processes, so save them in a tailq.
97 TAILQ_ENTRY(uio_resource) next;
99 struct rte_pci_addr pci_addr;
102 struct uio_map maps[PCI_MAX_RESOURCE];
105 TAILQ_HEAD(uio_res_list, uio_resource);
107 static struct uio_res_list *uio_res_list = NULL;
108 static int pci_parse_sysfs_value(const char *filename, uint64_t *val);
110 #ifdef RTE_EAL_UNBIND_PORTS
111 #define PROC_MODULES "/proc/modules"
113 #define IGB_UIO_NAME "igb_uio"
115 #define UIO_DRV_PATH "/sys/bus/pci/drivers/%s"
117 /* maximum time to wait that /dev/uioX appears */
118 #define UIO_DEV_WAIT_TIMEOUT 3 /* seconds */
121 * Check that a kernel module is loaded. Returns 0 on success, or if the
122 * parameter is NULL, or -1 if the module is not loaded.
125 pci_uio_check_module(const char *module_name)
131 if (module_name == NULL)
134 f = fopen(PROC_MODULES, "r");
136 RTE_LOG(ERR, EAL, "Cannot open "PROC_MODULES": %s\n",
141 while(fgets(buf, sizeof(buf), f) != NULL) {
143 for (i = 0; i < sizeof(buf) && buf[i] != '\0'; i++) {
148 if (strncmp(buf, module_name, sizeof(buf)) == 0) {
157 /* bind a PCI to the kernel module driver */
159 pci_bind_device(struct rte_pci_device *dev, char dr_path[])
164 char dev_bind[PATH_MAX];
165 struct rte_pci_addr *loc = &dev->addr;
167 n = rte_snprintf(dev_bind, sizeof(dev_bind), "%s/bind", dr_path);
168 if ((n < 0) || (n >= (int)sizeof(buf))) {
169 RTE_LOG(ERR, EAL, "Cannot rte_snprintf device bind path\n");
173 f = fopen(dev_bind, "w");
175 RTE_LOG(ERR, EAL, "Cannot open %s\n", dev_bind);
178 n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
179 loc->domain, loc->bus, loc->devid, loc->function);
180 if ((n < 0) || (n >= (int)sizeof(buf))) {
181 RTE_LOG(ERR, EAL, "Cannot rte_snprintf PCI infos\n");
185 if (fwrite(buf, n, 1, f) == 0) {
195 pci_uio_bind_device(struct rte_pci_device *dev, const char *module_name)
200 char uio_newid[PATH_MAX];
201 char uio_bind[PATH_MAX];
203 n = rte_snprintf(uio_newid, sizeof(uio_newid), UIO_DRV_PATH "/new_id", module_name);
204 if ((n < 0) || (n >= (int)sizeof(uio_newid))) {
205 RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_newid name\n");
209 n = rte_snprintf(uio_bind, sizeof(uio_bind), UIO_DRV_PATH, module_name);
210 if ((n < 0) || (n >= (int)sizeof(uio_bind))) {
211 RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_bind name\n");
215 n = rte_snprintf(buf, sizeof(buf), "%x %x\n",
216 dev->id.vendor_id, dev->id.device_id);
217 if ((n < 0) || (n >= (int)sizeof(buf))) {
218 RTE_LOG(ERR, EAL, "Cannot rte_snprintf vendor_id/device_id\n");
222 f = fopen(uio_newid, "w");
224 RTE_LOG(ERR, EAL, "Cannot open %s\n", uio_newid);
227 if (fwrite(buf, n, 1, f) == 0) {
233 pci_bind_device(dev, uio_bind);
237 /* unbind kernel driver for this device */
239 pci_unbind_kernel_driver(struct rte_pci_device *dev)
243 char filename[PATH_MAX];
245 struct rte_pci_addr *loc = &dev->addr;
247 /* open /sys/bus/pci/devices/AAAA:BB:CC.D/driver */
248 rte_snprintf(filename, sizeof(filename),
249 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/driver/unbind",
250 loc->domain, loc->bus, loc->devid, loc->function);
252 f = fopen(filename, "w");
253 if (f == NULL) /* device was not bound */
256 n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
257 loc->domain, loc->bus, loc->devid, loc->function);
258 if ((n < 0) || (n >= (int)sizeof(buf))) {
259 RTE_LOG(ERR, EAL, "%s(): rte_snprintf failed\n", __func__);
262 if (fwrite(buf, n, 1, f) == 0) {
263 RTE_LOG(ERR, EAL, "%s(): could not write to %s\n", __func__,
278 pci_switch_module(struct rte_pci_driver *dr, struct rte_pci_device *dev,
279 const char *module_name)
281 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
282 /* check that our driver is loaded */
283 if (pci_uio_check_module(module_name) != 0)
284 rte_exit(EXIT_FAILURE, "The %s module is required by the "
285 "%s driver\n", module_name, dr->name);
287 /* unbind current driver, bind ours */
288 if (pci_unbind_kernel_driver(dev) < 0)
290 if (pci_uio_bind_device(dev, module_name) < 0)
297 #endif /* ifdef EAL_UNBIND_PORTS */
299 /* map a particular resource from a file */
301 pci_map_resource(void *requested_addr, const char *devname, off_t offset,
307 #ifdef RTE_EAL_UNBIND_PORTS
309 * open devname, and mmap it: it can take some time to
310 * appear, so we wait some time before returning an error
313 for (n = 0; n < UIO_DEV_WAIT_TIMEOUT*10; n++) {
315 if ((fd = open(devname, O_RDWR)) < 0 && errno != ENOENT)
321 * open devname, to mmap it
323 fd = open(devname, O_RDWR);
326 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
327 devname, strerror(errno));
331 /* Map the PCI memory resource of device */
332 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
333 MAP_SHARED, fd, offset);
335 if (mapaddr == MAP_FAILED ||
336 (requested_addr != NULL && mapaddr != requested_addr)) {
337 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%s(%d), %p, 0x%lx, 0x%lx):"
338 " %s (%p)\n", __func__, devname, fd, requested_addr,
339 (unsigned long)size, (unsigned long)offset,
340 strerror(errno), mapaddr);
344 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
352 #define OFF_MAX ((uint64_t)(off_t)-1)
354 pci_uio_get_mappings(const char *devname, struct uio_map maps[], size_t nb_maps)
357 char dirname[PATH_MAX];
358 char filename[PATH_MAX];
359 uint64_t offset, size;
361 for (i = 0; i != nb_maps; i++) {
363 /* check if map directory exists */
364 rte_snprintf(dirname, sizeof(dirname),
365 "%s/maps/map%u", devname, i);
367 if (access(dirname, F_OK) != 0)
370 /* get mapping offset */
371 rte_snprintf(filename, sizeof(filename),
372 "%s/offset", dirname);
373 if (pci_parse_sysfs_value(filename, &offset) < 0) {
375 "%s(): cannot parse offset of %s\n",
380 /* get mapping size */
381 rte_snprintf(filename, sizeof(filename),
383 if (pci_parse_sysfs_value(filename, &size) < 0) {
385 "%s(): cannot parse size of %s\n",
390 /* get mapping physical address */
391 rte_snprintf(filename, sizeof(filename),
393 if (pci_parse_sysfs_value(filename, &maps[i].phaddr) < 0) {
395 "%s(): cannot parse addr of %s\n",
400 if ((offset > OFF_MAX) || (size > SIZE_MAX)) {
402 "%s(): offset/size exceed system max value\n",
407 maps[i].offset = offset;
414 pci_uio_map_secondary(struct rte_pci_device *dev)
417 struct uio_resource *uio_res;
419 TAILQ_FOREACH(uio_res, uio_res_list, next) {
421 /* skip this element if it doesn't match our PCI address */
422 if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
425 for (i = 0; i != uio_res->nb_maps; i++) {
426 if (pci_map_resource(uio_res->maps[i].addr,
428 (off_t)uio_res->maps[i].offset,
429 (size_t)uio_res->maps[i].size)
430 != uio_res->maps[i].addr) {
432 "Cannot mmap device resource\n");
439 RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
443 static int pci_mknod_uio_dev(const char *sysfs_uio_path, unsigned uio_num)
446 char filename[PATH_MAX];
448 unsigned major, minor;
451 /* get the name of the sysfs file that contains the major and minor
452 * of the uio device and read its content */
453 rte_snprintf(filename, sizeof(filename), "%s/dev", sysfs_uio_path);
455 f = fopen(filename, "r");
457 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs to get major:minor\n",
462 ret = fscanf(f, "%d:%d", &major, &minor);
464 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs to get major:minor\n",
471 /* create the char device "mknod /dev/uioX c major minor" */
472 rte_snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);
473 dev = makedev(major, minor);
474 ret = mknod(filename, S_IFCHR | S_IRUSR | S_IWUSR, dev);
476 RTE_LOG(ERR, EAL, "%s(): mknod() failed %s\n",
477 __func__, strerror(errno));
485 * Return the uioX char device used for a pci device. On success, return
486 * the UIO number and fill dstbuf string with the path of the device in
487 * sysfs. On error, return a negative value. In this case dstbuf is
490 static int pci_get_uio_dev(struct rte_pci_device *dev, char *dstbuf,
493 struct rte_pci_addr *loc = &dev->addr;
494 unsigned int uio_num;
497 char dirname[PATH_MAX];
499 /* depending on kernel version, uio can be located in uio/uioX
502 rte_snprintf(dirname, sizeof(dirname),
503 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
504 loc->domain, loc->bus, loc->devid, loc->function);
506 dir = opendir(dirname);
508 /* retry with the parent directory */
509 rte_snprintf(dirname, sizeof(dirname),
510 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
511 loc->domain, loc->bus, loc->devid, loc->function);
512 dir = opendir(dirname);
515 RTE_LOG(ERR, EAL, "Cannot opendir %s\n", dirname);
520 /* take the first file starting with "uio" */
521 while ((e = readdir(dir)) != NULL) {
522 /* format could be uio%d ...*/
523 int shortprefix_len = sizeof("uio") - 1;
524 /* ... or uio:uio%d */
525 int longprefix_len = sizeof("uio:uio") - 1;
528 if (strncmp(e->d_name, "uio", 3) != 0)
531 /* first try uio%d */
533 uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
534 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
535 rte_snprintf(dstbuf, buflen, "%s/uio%u", dirname, uio_num);
539 /* then try uio:uio%d */
541 uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
542 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
543 rte_snprintf(dstbuf, buflen, "%s/uio:uio%u", dirname, uio_num);
549 /* No uio resource found */
553 /* create uio device if we've been asked to */
554 if (internal_config.create_uio_dev && pci_mknod_uio_dev(dstbuf, uio_num) < 0)
555 RTE_LOG(WARNING, EAL, "Cannot create /dev/uio%u\n", uio_num);
560 /* map the PCI resource of a PCI device in virtual memory */
562 pci_uio_map_resource(struct rte_pci_device *dev)
565 char dirname[PATH_MAX];
566 char devname[PATH_MAX]; /* contains the /dev/uioX */
573 struct rte_pci_addr *loc = &dev->addr;
574 struct uio_resource *uio_res;
575 struct uio_map *maps;
577 dev->intr_handle.fd = -1;
578 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
580 /* secondary processes - use already recorded details */
581 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
582 return (pci_uio_map_secondary(dev));
584 /* find uio resource */
585 uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname));
587 RTE_LOG(WARNING, EAL, " "PCI_PRI_FMT" not managed by UIO driver, "
588 "skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
591 rte_snprintf(devname, sizeof(devname), "/dev/uio%u", uio_num);
593 /* save fd if in primary process */
594 dev->intr_handle.fd = open(devname, O_RDWR);
595 if (dev->intr_handle.fd < 0) {
596 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
597 devname, strerror(errno));
600 dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
602 /* allocate the mapping details for secondary processes*/
603 if ((uio_res = rte_zmalloc("UIO_RES", sizeof (*uio_res), 0)) == NULL) {
605 "%s(): cannot store uio mmap details\n", __func__);
609 rte_snprintf(uio_res->path, sizeof(uio_res->path), "%s", devname);
610 memcpy(&uio_res->pci_addr, &dev->addr, sizeof(uio_res->pci_addr));
612 /* collect info about device mappings */
613 nb_maps = pci_uio_get_mappings(dirname, uio_res->maps,
614 RTE_DIM(uio_res->maps));
620 uio_res->nb_maps = nb_maps;
623 pagesz = sysconf(_SC_PAGESIZE);
625 maps = uio_res->maps;
626 for (i = 0; i != PCI_MAX_RESOURCE; i++) {
629 if ((phaddr = dev->mem_resource[i].phys_addr) == 0)
632 for (j = 0; j != nb_maps && (phaddr != maps[j].phaddr ||
633 dev->mem_resource[i].len != maps[j].size);
637 /* if matching map is found, then use it */
640 if (maps[j].addr != NULL ||
641 (mapaddr = pci_map_resource(NULL, devname,
643 (size_t)maps[j].size)
649 maps[j].addr = mapaddr;
650 maps[j].offset = offset;
651 dev->mem_resource[i].addr = mapaddr;
655 TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
660 /* parse the "resource" sysfs file */
661 #define IORESOURCE_MEM 0x00000200
664 pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
668 union pci_resource_info {
674 char *ptrs[PCI_RESOURCE_FMT_NVAL];
677 uint64_t phys_addr, end_addr, flags;
679 f = fopen(filename, "r");
681 RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n");
685 for (i = 0; i<PCI_MAX_RESOURCE; i++) {
687 if (fgets(buf, sizeof(buf), f) == NULL) {
689 "%s(): cannot read resource\n", __func__);
693 if (rte_strsplit(buf, sizeof(buf), res_info.ptrs, 3, ' ') != 3) {
695 "%s(): bad resource format\n", __func__);
699 phys_addr = strtoull(res_info.phys_addr, NULL, 16);
700 end_addr = strtoull(res_info.end_addr, NULL, 16);
701 flags = strtoull(res_info.flags, NULL, 16);
704 "%s(): bad resource format\n", __func__);
708 if (flags & IORESOURCE_MEM) {
709 dev->mem_resource[i].phys_addr = phys_addr;
710 dev->mem_resource[i].len = end_addr - phys_addr + 1;
711 /* not mapped for now */
712 dev->mem_resource[i].addr = NULL;
724 * parse a sysfs file containing one integer value
725 * different to the eal version, as it needs to work with 64-bit values
728 pci_parse_sysfs_value(const char *filename, uint64_t *val)
734 f = fopen(filename, "r");
736 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
741 if (fgets(buf, sizeof(buf), f) == NULL) {
742 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
747 *val = strtoull(buf, &end, 0);
748 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
749 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
758 /* Compare two PCI device addresses. */
760 pci_addr_comparison(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
762 uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) + (addr->devid << 8) + addr->function;
763 uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) + (addr2->devid << 8) + addr2->function;
765 if (dev_addr > dev_addr2)
772 /* Scan one pci sysfs entry, and fill the devices list from it. */
774 pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
775 uint8_t devid, uint8_t function)
777 char filename[PATH_MAX];
779 struct rte_pci_device *dev;
781 dev = malloc(sizeof(*dev));
786 memset(dev, 0, sizeof(*dev));
787 dev->addr.domain = domain;
789 dev->addr.devid = devid;
790 dev->addr.function = function;
793 rte_snprintf(filename, sizeof(filename), "%s/vendor", dirname);
794 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
798 dev->id.vendor_id = (uint16_t)tmp;
801 rte_snprintf(filename, sizeof(filename), "%s/device", dirname);
802 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
806 dev->id.device_id = (uint16_t)tmp;
808 /* get subsystem_vendor id */
809 rte_snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
811 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
815 dev->id.subsystem_vendor_id = (uint16_t)tmp;
817 /* get subsystem_device id */
818 rte_snprintf(filename, sizeof(filename), "%s/subsystem_device",
820 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
824 dev->id.subsystem_device_id = (uint16_t)tmp;
828 rte_snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
829 if (!access(filename, F_OK) &&
830 eal_parse_sysfs_value(filename, &tmp) == 0) {
831 dev->max_vfs = (uint16_t)tmp;
835 rte_snprintf(filename, sizeof(filename), "%s/numa_node",
837 if (access(filename, R_OK) != 0) {
838 /* if no NUMA support just set node to 0 */
841 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
845 dev->numa_node = tmp;
848 /* parse resources */
849 rte_snprintf(filename, sizeof(filename), "%s/resource", dirname);
850 if (pci_parse_sysfs_resource(filename, dev) < 0) {
851 RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
856 /* device is valid, add in list (sorted) */
857 if (TAILQ_EMPTY(&pci_device_list)) {
858 TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
861 struct rte_pci_device *dev2 = NULL;
863 TAILQ_FOREACH(dev2, &pci_device_list, next) {
864 if (pci_addr_comparison(&dev->addr, &dev2->addr))
867 TAILQ_INSERT_BEFORE(dev2, dev, next);
871 TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
878 * split up a pci address into its constituent parts.
881 parse_pci_addr_format(const char *buf, int bufsize, uint16_t *domain,
882 uint8_t *bus, uint8_t *devid, uint8_t *function)
884 /* first split on ':' */
892 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
895 char *buf_copy = strndup(buf, bufsize);
896 if (buf_copy == NULL)
899 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
902 /* final split is on '.' between devid and function */
903 splitaddr.function = strchr(splitaddr.devid,'.');
904 if (splitaddr.function == NULL)
906 *splitaddr.function++ = '\0';
908 /* now convert to int values */
910 *domain = (uint16_t)strtoul(splitaddr.domain, NULL, 16);
911 *bus = (uint8_t)strtoul(splitaddr.bus, NULL, 16);
912 *devid = (uint8_t)strtoul(splitaddr.devid, NULL, 16);
913 *function = (uint8_t)strtoul(splitaddr.function, NULL, 10);
917 free(buf_copy); /* free the copy made with strdup */
925 * Scan the content of the PCI bus, and the devices in the devices
933 char dirname[PATH_MAX];
935 uint8_t bus, devid, function;
937 dir = opendir(SYSFS_PCI_DEVICES);
939 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n",
940 __func__, strerror(errno));
944 while ((e = readdir(dir)) != NULL) {
945 if (e->d_name[0] == '.')
948 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &domain,
949 &bus, &devid, &function) != 0)
952 rte_snprintf(dirname, sizeof(dirname), "%s/%s", SYSFS_PCI_DEVICES,
954 if (pci_scan_one(dirname, domain, bus, devid, function) < 0)
966 * If vendor/device ID match, call the devinit() function of the
970 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
972 struct rte_pci_id *id_table;
974 for (id_table = dr->id_table ; id_table->vendor_id != 0; id_table++) {
976 /* check if device's identifiers match the driver's ones */
977 if (id_table->vendor_id != dev->id.vendor_id &&
978 id_table->vendor_id != PCI_ANY_ID)
980 if (id_table->device_id != dev->id.device_id &&
981 id_table->device_id != PCI_ANY_ID)
983 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
984 id_table->subsystem_vendor_id != PCI_ANY_ID)
986 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
987 id_table->subsystem_device_id != PCI_ANY_ID)
990 struct rte_pci_addr *loc = &dev->addr;
992 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
993 loc->domain, loc->bus, loc->devid, loc->function,
996 RTE_LOG(DEBUG, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
997 dev->id.device_id, dr->name);
999 /* no initialization when blacklisted, return without error */
1000 if (dev->devargs != NULL &&
1001 dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
1002 RTE_LOG(DEBUG, EAL, " Device is blacklisted, not initializing\n");
1006 #ifdef RTE_EAL_UNBIND_PORTS
1007 if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO) {
1008 /* unbind current driver and bind on igb_uio */
1009 if (pci_switch_module(dr, dev, IGB_UIO_NAME) < 0)
1011 } else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
1012 rte_eal_process_type() == RTE_PROC_PRIMARY) {
1013 /* unbind current driver */
1014 if (pci_unbind_kernel_driver(dev) < 0)
1019 if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO) {
1020 /* map resources for devices that use igb_uio */
1021 if (pci_uio_map_resource(dev) < 0)
1025 /* reference driver structure */
1028 /* call the driver devinit() function */
1029 return dr->devinit(dr, dev);
1031 /* return positive value if driver is not found */
1035 /* Init the PCI EAL subsystem */
1037 rte_eal_pci_init(void)
1039 TAILQ_INIT(&pci_driver_list);
1040 TAILQ_INIT(&pci_device_list);
1041 uio_res_list = RTE_TAILQ_RESERVE_BY_IDX(RTE_TAILQ_PCI, uio_res_list);
1043 /* for debug purposes, PCI can be disabled */
1044 if (internal_config.no_pci)
1047 if (pci_scan() < 0) {
1048 RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__);