4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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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 /* forward prototype of function called in pci_switch_module below */
111 static int pci_uio_map_resource(struct rte_pci_device *dev);
113 #ifdef RTE_EAL_UNBIND_PORTS
114 #define PROC_MODULES "/proc/modules"
116 #define IGB_UIO_NAME "igb_uio"
118 #define UIO_DRV_PATH "/sys/bus/pci/drivers/%s"
120 /* maximum time to wait that /dev/uioX appears */
121 #define UIO_DEV_WAIT_TIMEOUT 3 /* seconds */
124 * Check that a kernel module is loaded. Returns 0 on success, or if the
125 * parameter is NULL, or -1 if the module is not loaded.
128 pci_uio_check_module(const char *module_name)
134 if (module_name == NULL)
137 f = fopen(PROC_MODULES, "r");
139 RTE_LOG(ERR, EAL, "Cannot open "PROC_MODULES": %s\n",
144 while(fgets(buf, sizeof(buf), f) != NULL) {
146 for (i = 0; i < sizeof(buf) && buf[i] != '\0'; i++) {
151 if (strncmp(buf, module_name, sizeof(buf)) == 0) {
160 /* bind a PCI to the kernel module driver */
162 pci_bind_device(struct rte_pci_device *dev, char dr_path[])
167 char dev_bind[PATH_MAX];
168 struct rte_pci_addr *loc = &dev->addr;
170 n = rte_snprintf(dev_bind, sizeof(dev_bind), "%s/bind", dr_path);
171 if ((n < 0) || (n >= (int)sizeof(buf))) {
172 RTE_LOG(ERR, EAL, "Cannot rte_snprintf device bind path\n");
176 f = fopen(dev_bind, "w");
178 RTE_LOG(ERR, EAL, "Cannot open %s\n", dev_bind);
181 n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
182 loc->domain, loc->bus, loc->devid, loc->function);
183 if ((n < 0) || (n >= (int)sizeof(buf))) {
184 RTE_LOG(ERR, EAL, "Cannot rte_snprintf PCI infos\n");
188 if (fwrite(buf, n, 1, f) == 0) {
198 pci_uio_bind_device(struct rte_pci_device *dev, const char *module_name)
203 char uio_newid[PATH_MAX];
204 char uio_bind[PATH_MAX];
206 n = rte_snprintf(uio_newid, sizeof(uio_newid), UIO_DRV_PATH "/new_id", module_name);
207 if ((n < 0) || (n >= (int)sizeof(uio_newid))) {
208 RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_newid name\n");
212 n = rte_snprintf(uio_bind, sizeof(uio_bind), UIO_DRV_PATH, module_name);
213 if ((n < 0) || (n >= (int)sizeof(uio_bind))) {
214 RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_bind name\n");
218 n = rte_snprintf(buf, sizeof(buf), "%x %x\n",
219 dev->id.vendor_id, dev->id.device_id);
220 if ((n < 0) || (n >= (int)sizeof(buf))) {
221 RTE_LOG(ERR, EAL, "Cannot rte_snprintf vendor_id/device_id\n");
225 f = fopen(uio_newid, "w");
227 RTE_LOG(ERR, EAL, "Cannot open %s\n", uio_newid);
230 if (fwrite(buf, n, 1, f) == 0) {
236 pci_bind_device(dev, uio_bind);
240 /* unbind kernel driver for this device */
242 pci_unbind_kernel_driver(struct rte_pci_device *dev)
246 char filename[PATH_MAX];
248 struct rte_pci_addr *loc = &dev->addr;
250 /* open /sys/bus/pci/devices/AAAA:BB:CC.D/driver */
251 rte_snprintf(filename, sizeof(filename),
252 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/driver/unbind",
253 loc->domain, loc->bus, loc->devid, loc->function);
255 f = fopen(filename, "w");
256 if (f == NULL) /* device was not bound */
259 n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
260 loc->domain, loc->bus, loc->devid, loc->function);
261 if ((n < 0) || (n >= (int)sizeof(buf))) {
262 RTE_LOG(ERR, EAL, "%s(): rte_snprintf failed\n", __func__);
265 if (fwrite(buf, n, 1, f) == 0) {
266 RTE_LOG(ERR, EAL, "%s(): could not write to %s\n", __func__,
281 pci_switch_module(struct rte_pci_driver *dr, struct rte_pci_device *dev,
282 int uio_status, const char *module_name)
284 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
285 /* check that our driver is loaded */
286 if (uio_status != 0 &&
287 (uio_status = pci_uio_check_module(module_name)) != 0)
288 rte_exit(EXIT_FAILURE, "The %s module is required by the "
289 "%s driver\n", module_name, dr->name);
291 /* unbind current driver, bind ours */
292 if (pci_unbind_kernel_driver(dev) < 0)
294 if (pci_uio_bind_device(dev, module_name) < 0)
297 /* map the NIC resources */
298 if (pci_uio_map_resource(dev) < 0)
304 #endif /* ifdef EAL_UNBIND_PORTS */
306 /* map a particular resource from a file */
308 pci_map_resource(struct rte_pci_device *dev, void *requested_addr,
309 const char *devname, off_t offset, size_t size)
314 #ifdef RTE_EAL_UNBIND_PORTS
316 * open devname, and mmap it: it can take some time to
317 * appear, so we wait some time before returning an error
320 fd = dev->intr_handle.fd;
321 for (n = 0; n < UIO_DEV_WAIT_TIMEOUT*10 && fd < 0; n++) {
323 if ((fd = open(devname, O_RDWR)) < 0 && errno != ENOENT)
329 * open devname, to mmap it
331 fd = open(devname, O_RDWR);
334 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
335 devname, strerror(errno));
339 /* Map the PCI memory resource of device */
340 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
341 MAP_SHARED, fd, offset);
342 if (mapaddr == MAP_FAILED ||
343 (requested_addr != NULL && mapaddr != requested_addr)) {
344 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%s(%d), %p, 0x%lx, 0x%lx):"
345 " %s (%p)\n", __func__, devname, fd, requested_addr,
346 (unsigned long)size, (unsigned long)offset,
347 strerror(errno), mapaddr);
351 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
352 /* save fd if in primary process */
353 dev->intr_handle.fd = fd;
354 dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
356 /* fd is not needed in slave process, close it */
357 dev->intr_handle.fd = -1;
358 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
362 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
367 dev->intr_handle.fd = -1;
368 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
373 #define OFF_MAX ((uint64_t)(off_t)-1)
375 pci_uio_get_mappings(const char *devname, struct uio_map maps[], size_t nb_maps)
378 char dirname[PATH_MAX];
379 char filename[PATH_MAX];
380 uint64_t offset, size;
382 for (i = 0; i != nb_maps; i++) {
384 /* check if map directory exists */
385 rte_snprintf(dirname, sizeof(dirname),
386 "%s/maps/map%u", devname, i);
388 if (access(dirname, F_OK) != 0)
391 /* get mapping offset */
392 rte_snprintf(filename, sizeof(filename),
393 "%s/offset", dirname);
394 if (pci_parse_sysfs_value(filename, &offset) < 0) {
396 "%s(): cannot parse offset of %s\n",
401 /* get mapping size */
402 rte_snprintf(filename, sizeof(filename),
404 if (pci_parse_sysfs_value(filename, &size) < 0) {
406 "%s(): cannot parse size of %s\n",
411 /* get mapping physical address */
412 rte_snprintf(filename, sizeof(filename),
414 if (pci_parse_sysfs_value(filename, &maps[i].phaddr) < 0) {
416 "%s(): cannot parse addr of %s\n",
421 if ((offset > OFF_MAX) || (size > SIZE_MAX)) {
423 "%s(): offset/size exceed system max value\n",
428 maps[i].offset = offset;
435 pci_uio_map_secondary(struct rte_pci_device *dev)
438 struct uio_resource *uio_res;
440 TAILQ_FOREACH(uio_res, uio_res_list, next) {
442 /* skip this element if it doesn't match our PCI address */
443 if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
446 for (i = 0; i != uio_res->nb_maps; i++) {
447 if (pci_map_resource(dev, uio_res->maps[i].addr,
449 (off_t)uio_res->maps[i].offset,
450 (size_t)uio_res->maps[i].size) !=
451 uio_res->maps[i].addr) {
453 "Cannot mmap device resource\n");
460 RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
464 static int pci_mknod_uio_dev(const char *sysfs_uio_path, unsigned uio_num)
467 char filename[PATH_MAX];
469 unsigned major, minor;
472 /* get the name of the sysfs file that contains the major and minor
473 * of the uio device and read its content */
474 rte_snprintf(filename, sizeof(filename), "%s/dev", sysfs_uio_path);
476 f = fopen(filename, "r");
478 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs to get major:minor\n",
483 ret = fscanf(f, "%d:%d", &major, &minor);
485 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs to get major:minor\n",
492 /* create the char device "mknod /dev/uioX c major minor" */
493 rte_snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);
494 dev = makedev(major, minor);
495 ret = mknod(filename, S_IFCHR | S_IRUSR | S_IWUSR, dev);
497 RTE_LOG(ERR, EAL, "%s(): mknod() failed %s\n",
498 __func__, strerror(errno));
506 * Return the uioX char device used for a pci device. On success, return
507 * the UIO number and fill dstbuf string with the path of the device in
508 * sysfs. On error, return a negative value. In this case dstbuf is
511 static int pci_get_uio_dev(struct rte_pci_device *dev, char *dstbuf,
514 struct rte_pci_addr *loc = &dev->addr;
515 unsigned int uio_num;
518 char dirname[PATH_MAX];
520 /* depending on kernel version, uio can be located in uio/uioX
523 rte_snprintf(dirname, sizeof(dirname),
524 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
525 loc->domain, loc->bus, loc->devid, loc->function);
527 dir = opendir(dirname);
529 /* retry with the parent directory */
530 rte_snprintf(dirname, sizeof(dirname),
531 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
532 loc->domain, loc->bus, loc->devid, loc->function);
533 dir = opendir(dirname);
536 RTE_LOG(ERR, EAL, "Cannot opendir %s\n", dirname);
541 /* take the first file starting with "uio" */
542 while ((e = readdir(dir)) != NULL) {
543 /* format could be uio%d ...*/
544 int shortprefix_len = sizeof("uio") - 1;
545 /* ... or uio:uio%d */
546 int longprefix_len = sizeof("uio:uio") - 1;
549 if (strncmp(e->d_name, "uio", 3) != 0)
552 /* first try uio%d */
554 uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
555 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
556 rte_snprintf(dstbuf, buflen, "%s/uio%u", dirname, uio_num);
560 /* then try uio:uio%d */
562 uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
563 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
564 rte_snprintf(dstbuf, buflen, "%s/uio:uio%u", dirname, uio_num);
570 /* No uio resource found */
574 /* create uio device if we've been asked to */
575 if (internal_config.create_uio_dev && pci_mknod_uio_dev(dstbuf, uio_num) < 0)
576 RTE_LOG(WARNING, EAL, "Cannot create /dev/uio%u\n", uio_num);
581 /* map the PCI resource of a PCI device in virtual memory */
583 pci_uio_map_resource(struct rte_pci_device *dev)
586 char dirname[PATH_MAX];
587 char devname[PATH_MAX]; /* contains the /dev/uioX */
594 struct rte_pci_addr *loc = &dev->addr;
595 struct uio_resource *uio_res;
596 struct uio_map *maps;
598 dev->intr_handle.fd = -1;
600 /* secondary processes - use already recorded details */
601 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
602 return (pci_uio_map_secondary(dev));
604 /* find uio resource */
605 uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname));
607 RTE_LOG(WARNING, EAL, " "PCI_PRI_FMT" not managed by UIO driver, "
608 "skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
612 /* allocate the mapping details for secondary processes*/
613 if ((uio_res = rte_zmalloc("UIO_RES", sizeof (*uio_res), 0)) == NULL) {
615 "%s(): cannot store uio mmap details\n", __func__);
619 rte_snprintf(devname, sizeof(devname), "/dev/uio%u", uio_num);
620 rte_snprintf(uio_res->path, sizeof(uio_res->path), "%s", devname);
621 memcpy(&uio_res->pci_addr, &dev->addr, sizeof(uio_res->pci_addr));
623 /* collect info about device mappings */
624 nb_maps = pci_uio_get_mappings(dirname, uio_res->maps,
625 RTE_DIM(uio_res->maps));
631 uio_res->nb_maps = nb_maps;
634 pagesz = sysconf(_SC_PAGESIZE);
636 maps = uio_res->maps;
637 for (i = 0; i != PCI_MAX_RESOURCE; i++) {
640 if ((phaddr = dev->mem_resource[i].phys_addr) == 0)
643 for (j = 0; j != nb_maps && (phaddr != maps[j].phaddr ||
644 dev->mem_resource[i].len != maps[j].size);
648 /* if matching map is found, then use it */
651 if (maps[j].addr != NULL ||
652 (mapaddr = pci_map_resource(dev,
653 NULL, devname, (off_t)offset,
654 (size_t)maps[j].size)) == NULL) {
659 maps[j].addr = mapaddr;
660 maps[j].offset = offset;
661 dev->mem_resource[i].addr = mapaddr;
665 TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
670 /* parse the "resource" sysfs file */
671 #define IORESOURCE_MEM 0x00000200
674 pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
678 union pci_resource_info {
684 char *ptrs[PCI_RESOURCE_FMT_NVAL];
687 uint64_t phys_addr, end_addr, flags;
689 f = fopen(filename, "r");
691 RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n");
695 for (i = 0; i<PCI_MAX_RESOURCE; i++) {
697 if (fgets(buf, sizeof(buf), f) == NULL) {
699 "%s(): cannot read resource\n", __func__);
703 if (rte_strsplit(buf, sizeof(buf), res_info.ptrs, 3, ' ') != 3) {
705 "%s(): bad resource format\n", __func__);
709 phys_addr = strtoull(res_info.phys_addr, NULL, 16);
710 end_addr = strtoull(res_info.end_addr, NULL, 16);
711 flags = strtoull(res_info.flags, NULL, 16);
714 "%s(): bad resource format\n", __func__);
718 if (flags & IORESOURCE_MEM) {
719 dev->mem_resource[i].phys_addr = phys_addr;
720 dev->mem_resource[i].len = end_addr - phys_addr + 1;
721 /* not mapped for now */
722 dev->mem_resource[i].addr = NULL;
734 * parse a sysfs file containing one integer value
735 * different to the eal version, as it needs to work with 64-bit values
738 pci_parse_sysfs_value(const char *filename, uint64_t *val)
744 f = fopen(filename, "r");
746 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
751 if (fgets(buf, sizeof(buf), f) == NULL) {
752 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
757 *val = strtoull(buf, &end, 0);
758 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
759 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
768 /* Compare two PCI device addresses. */
770 pci_addr_comparison(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
772 uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) + (addr->devid << 8) + addr->function;
773 uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) + (addr2->devid << 8) + addr2->function;
775 if (dev_addr > dev_addr2)
782 /* Scan one pci sysfs entry, and fill the devices list from it. */
784 pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
785 uint8_t devid, uint8_t function)
787 char filename[PATH_MAX];
789 struct rte_pci_device *dev;
791 dev = malloc(sizeof(*dev));
796 memset(dev, 0, sizeof(*dev));
797 dev->addr.domain = domain;
799 dev->addr.devid = devid;
800 dev->addr.function = function;
803 rte_snprintf(filename, sizeof(filename), "%s/vendor", dirname);
804 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
808 dev->id.vendor_id = (uint16_t)tmp;
811 rte_snprintf(filename, sizeof(filename), "%s/device", dirname);
812 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
816 dev->id.device_id = (uint16_t)tmp;
818 /* get subsystem_vendor id */
819 rte_snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
821 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
825 dev->id.subsystem_vendor_id = (uint16_t)tmp;
827 /* get subsystem_device id */
828 rte_snprintf(filename, sizeof(filename), "%s/subsystem_device",
830 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
834 dev->id.subsystem_device_id = (uint16_t)tmp;
838 rte_snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
839 if (!access(filename, F_OK) &&
840 eal_parse_sysfs_value(filename, &tmp) == 0) {
841 dev->max_vfs = (uint16_t)tmp;
845 rte_snprintf(filename, sizeof(filename), "%s/numa_node",
847 if (access(filename, R_OK) != 0) {
848 /* if no NUMA support just set node to 0 */
851 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
855 dev->numa_node = tmp;
858 /* parse resources */
859 rte_snprintf(filename, sizeof(filename), "%s/resource", dirname);
860 if (pci_parse_sysfs_resource(filename, dev) < 0) {
861 RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
866 /* device is valid, add in list (sorted) */
867 if (TAILQ_EMPTY(&pci_device_list)) {
868 TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
871 struct rte_pci_device *dev2 = NULL;
873 TAILQ_FOREACH(dev2, &pci_device_list, next) {
874 if (pci_addr_comparison(&dev->addr, &dev2->addr))
877 TAILQ_INSERT_BEFORE(dev2, dev, next);
881 TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
888 * split up a pci address into its constituent parts.
891 parse_pci_addr_format(const char *buf, int bufsize, uint16_t *domain,
892 uint8_t *bus, uint8_t *devid, uint8_t *function)
894 /* first split on ':' */
902 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
905 char *buf_copy = strndup(buf, bufsize);
906 if (buf_copy == NULL)
909 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
912 /* final split is on '.' between devid and function */
913 splitaddr.function = strchr(splitaddr.devid,'.');
914 if (splitaddr.function == NULL)
916 *splitaddr.function++ = '\0';
918 /* now convert to int values */
920 *domain = (uint16_t)strtoul(splitaddr.domain, NULL, 16);
921 *bus = (uint8_t)strtoul(splitaddr.bus, NULL, 16);
922 *devid = (uint8_t)strtoul(splitaddr.devid, NULL, 16);
923 *function = (uint8_t)strtoul(splitaddr.function, NULL, 10);
927 free(buf_copy); /* free the copy made with strdup */
935 * Scan the content of the PCI bus, and the devices in the devices
943 char dirname[PATH_MAX];
945 uint8_t bus, devid, function;
947 dir = opendir(SYSFS_PCI_DEVICES);
949 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n",
950 __func__, strerror(errno));
954 while ((e = readdir(dir)) != NULL) {
955 if (e->d_name[0] == '.')
958 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &domain,
959 &bus, &devid, &function) != 0)
962 rte_snprintf(dirname, sizeof(dirname), "%s/%s", SYSFS_PCI_DEVICES,
964 if (pci_scan_one(dirname, domain, bus, devid, function) < 0)
976 * If vendor/device ID match, call the devinit() function of the
980 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
982 struct rte_pci_id *id_table;
984 for (id_table = dr->id_table ; id_table->vendor_id != 0; id_table++) {
986 /* check if device's identifiers match the driver's ones */
987 if (id_table->vendor_id != dev->id.vendor_id &&
988 id_table->vendor_id != PCI_ANY_ID)
990 if (id_table->device_id != dev->id.device_id &&
991 id_table->device_id != PCI_ANY_ID)
993 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
994 id_table->subsystem_vendor_id != PCI_ANY_ID)
996 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
997 id_table->subsystem_device_id != PCI_ANY_ID)
1000 struct rte_pci_addr *loc = &dev->addr;
1002 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
1003 loc->domain, loc->bus, loc->devid, loc->function,
1006 RTE_LOG(DEBUG, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
1007 dev->id.device_id, dr->name);
1009 /* no initialization when blacklisted, return without error */
1010 if (dev->devargs != NULL &&
1011 dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
1012 RTE_LOG(DEBUG, EAL, " Device is blacklisted, not initializing\n");
1016 #ifdef RTE_EAL_UNBIND_PORTS
1017 if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO) {
1018 /* unbind driver and load uio resources for Intel NICs */
1019 if (pci_switch_module(dr, dev, 1, IGB_UIO_NAME) < 0)
1021 } else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
1022 rte_eal_process_type() == RTE_PROC_PRIMARY) {
1023 /* unbind current driver */
1024 if (pci_unbind_kernel_driver(dev) < 0)
1028 if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO)
1029 /* just map resources for Intel NICs */
1030 if (pci_uio_map_resource(dev) < 0)
1034 /* reference driver structure */
1037 /* call the driver devinit() function */
1038 return dr->devinit(dr, dev);
1040 /* return positive value if driver is not found */
1044 /* Init the PCI EAL subsystem */
1046 rte_eal_pci_init(void)
1048 TAILQ_INIT(&pci_driver_list);
1049 TAILQ_INIT(&pci_device_list);
1050 uio_res_list = RTE_TAILQ_RESERVE_BY_IDX(RTE_TAILQ_PCI, uio_res_list);
1052 /* for debug purposes, PCI can be disabled */
1053 if (internal_config.no_pci)
1056 if (pci_scan() < 0) {
1057 RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__);