4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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>
68 #include "rte_pci_dev_ids.h"
69 #include "eal_filesystem.h"
70 #include "eal_private.h"
74 * PCI probing under linux
76 * This code is used to simulate a PCI probe by parsing information in
77 * sysfs. Moreover, when a registered driver matches a device, the
78 * kernel driver currently using it is unloaded and replaced by
79 * igb_uio module, which is a very minimal userland driver for Intel
80 * network card, only providing access to PCI BAR to applications, and
81 * enabling bus master.
92 * For multi-process we need to reproduce all PCI mappings in secondary
93 * processes, so save them in a tailq.
96 TAILQ_ENTRY(uio_resource) next;
98 struct rte_pci_addr pci_addr;
101 struct uio_map maps[PCI_MAX_RESOURCE];
104 TAILQ_HEAD(uio_res_list, uio_resource);
106 static struct uio_res_list *uio_res_list = NULL;
107 static int pci_parse_sysfs_value(const char *filename, uint64_t *val);
109 /* forward prototype of function called in pci_switch_module below */
110 static int pci_uio_map_resource(struct rte_pci_device *dev);
112 #ifdef RTE_EAL_UNBIND_PORTS
113 #define PROC_MODULES "/proc/modules"
115 #define IGB_UIO_NAME "igb_uio"
117 #define UIO_DRV_PATH "/sys/bus/pci/drivers/%s"
119 /* maximum time to wait that /dev/uioX appears */
120 #define UIO_DEV_WAIT_TIMEOUT 3 /* seconds */
123 * Check that a kernel module is loaded. Returns 0 on success, or if the
124 * parameter is NULL, or -1 if the module is not loaded.
127 pci_uio_check_module(const char *module_name)
133 if (module_name == NULL)
136 f = fopen(PROC_MODULES, "r");
138 RTE_LOG(ERR, EAL, "Cannot open "PROC_MODULES": %s\n",
143 while(fgets(buf, sizeof(buf), f) != NULL) {
145 for (i = 0; i < sizeof(buf) && buf[i] != '\0'; i++) {
150 if (strncmp(buf, module_name, sizeof(buf)) == 0) {
159 /* bind a PCI to the kernel module driver */
161 pci_bind_device(struct rte_pci_device *dev, char dr_path[])
166 char dev_bind[PATH_MAX];
167 struct rte_pci_addr *loc = &dev->addr;
169 n = rte_snprintf(dev_bind, sizeof(dev_bind), "%s/bind", dr_path);
170 if ((n < 0) || (n >= (int)sizeof(buf))) {
171 RTE_LOG(ERR, EAL, "Cannot rte_snprintf device bind path\n");
175 f = fopen(dev_bind, "w");
177 RTE_LOG(ERR, EAL, "Cannot open %s\n", dev_bind);
180 n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
181 loc->domain, loc->bus, loc->devid, loc->function);
182 if ((n < 0) || (n >= (int)sizeof(buf))) {
183 RTE_LOG(ERR, EAL, "Cannot rte_snprintf PCI infos\n");
187 if (fwrite(buf, n, 1, f) == 0) {
197 pci_uio_bind_device(struct rte_pci_device *dev, const char *module_name)
202 char uio_newid[PATH_MAX];
203 char uio_bind[PATH_MAX];
205 n = rte_snprintf(uio_newid, sizeof(uio_newid), UIO_DRV_PATH "/new_id", module_name);
206 if ((n < 0) || (n >= (int)sizeof(uio_newid))) {
207 RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_newid name\n");
211 n = rte_snprintf(uio_bind, sizeof(uio_bind), UIO_DRV_PATH, module_name);
212 if ((n < 0) || (n >= (int)sizeof(uio_bind))) {
213 RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_bind name\n");
217 n = rte_snprintf(buf, sizeof(buf), "%x %x\n",
218 dev->id.vendor_id, dev->id.device_id);
219 if ((n < 0) || (n >= (int)sizeof(buf))) {
220 RTE_LOG(ERR, EAL, "Cannot rte_snprintf vendor_id/device_id\n");
224 f = fopen(uio_newid, "w");
226 RTE_LOG(ERR, EAL, "Cannot open %s\n", uio_newid);
229 if (fwrite(buf, n, 1, f) == 0) {
235 pci_bind_device(dev, uio_bind);
239 /* unbind kernel driver for this device */
241 pci_unbind_kernel_driver(struct rte_pci_device *dev)
245 char filename[PATH_MAX];
247 struct rte_pci_addr *loc = &dev->addr;
249 /* open /sys/bus/pci/devices/AAAA:BB:CC.D/driver */
250 rte_snprintf(filename, sizeof(filename),
251 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/driver/unbind",
252 loc->domain, loc->bus, loc->devid, loc->function);
254 f = fopen(filename, "w");
255 if (f == NULL) /* device was not bound */
258 n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
259 loc->domain, loc->bus, loc->devid, loc->function);
260 if ((n < 0) || (n >= (int)sizeof(buf))) {
261 RTE_LOG(ERR, EAL, "%s(): rte_snprintf failed\n", __func__);
264 if (fwrite(buf, n, 1, f) == 0) {
265 RTE_LOG(ERR, EAL, "%s(): could not write to %s\n", __func__,
280 pci_switch_module(struct rte_pci_driver *dr, struct rte_pci_device *dev,
281 int uio_status, const char *module_name)
283 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
284 /* check that our driver is loaded */
285 if (uio_status != 0 &&
286 (uio_status = pci_uio_check_module(module_name)) != 0)
287 rte_exit(EXIT_FAILURE, "The %s module is required by the "
288 "%s driver\n", module_name, dr->name);
290 /* unbind current driver, bind ours */
291 if (pci_unbind_kernel_driver(dev) < 0)
293 if (pci_uio_bind_device(dev, module_name) < 0)
296 /* map the NIC resources */
297 if (pci_uio_map_resource(dev) < 0)
303 #endif /* ifdef EAL_UNBIND_PORTS */
305 /* map a particular resource from a file */
307 pci_map_resource(struct rte_pci_device *dev, void *requested_addr,
308 const char *devname, off_t offset, size_t size)
313 #ifdef RTE_EAL_UNBIND_PORTS
315 * open devname, and mmap it: it can take some time to
316 * appear, so we wait some time before returning an error
319 fd = dev->intr_handle.fd;
320 for (n = 0; n < UIO_DEV_WAIT_TIMEOUT*10 && fd < 0; n++) {
322 if ((fd = open(devname, O_RDWR)) < 0 && errno != ENOENT)
328 * open devname, to mmap it
330 fd = open(devname, O_RDWR);
333 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
334 devname, strerror(errno));
338 /* Map the PCI memory resource of device */
339 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
340 MAP_SHARED, fd, offset);
341 if (mapaddr == MAP_FAILED ||
342 (requested_addr != NULL && mapaddr != requested_addr)) {
343 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%s(%d), %p, 0x%lx, 0x%lx):"
344 " %s (%p)\n", __func__, devname, fd, requested_addr,
345 (unsigned long)size, (unsigned long)offset,
346 strerror(errno), mapaddr);
350 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
351 /* save fd if in primary process */
352 dev->intr_handle.fd = fd;
353 dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
355 /* fd is not needed in slave process, close it */
356 dev->intr_handle.fd = -1;
357 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
361 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
366 dev->intr_handle.fd = -1;
367 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
372 #define OFF_MAX ((uint64_t)(off_t)-1)
374 pci_uio_get_mappings(const char *devname, struct uio_map maps[], size_t nb_maps)
377 char dirname[PATH_MAX];
378 char filename[PATH_MAX];
379 uint64_t offset, size;
381 for (i = 0; i != nb_maps; i++) {
383 /* check if map directory exists */
384 rte_snprintf(dirname, sizeof(dirname),
385 "%s/maps/map%u", devname, i);
387 if (access(dirname, F_OK) != 0)
390 /* get mapping offset */
391 rte_snprintf(filename, sizeof(filename),
392 "%s/offset", dirname);
393 if (pci_parse_sysfs_value(filename, &offset) < 0) {
395 "%s(): cannot parse offset of %s\n",
400 /* get mapping size */
401 rte_snprintf(filename, sizeof(filename),
403 if (pci_parse_sysfs_value(filename, &size) < 0) {
405 "%s(): cannot parse size of %s\n",
410 /* get mapping physical address */
411 rte_snprintf(filename, sizeof(filename),
413 if (pci_parse_sysfs_value(filename, &maps[i].phaddr) < 0) {
415 "%s(): cannot parse addr of %s\n",
420 if ((offset > OFF_MAX) || (size > SIZE_MAX)) {
422 "%s(): offset/size exceed system max value\n",
427 maps[i].offset = offset;
434 pci_uio_map_secondary(struct rte_pci_device *dev)
437 struct uio_resource *uio_res;
439 TAILQ_FOREACH(uio_res, uio_res_list, next) {
441 /* skip this element if it doesn't match our PCI address */
442 if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
445 for (i = 0; i != uio_res->nb_maps; i++) {
446 if (pci_map_resource(dev, uio_res->maps[i].addr,
448 (off_t)uio_res->maps[i].offset,
449 (size_t)uio_res->maps[i].size) !=
450 uio_res->maps[i].addr) {
452 "Cannot mmap device resource\n");
459 RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
463 /* map the PCI resource of a PCI device in virtual memory */
465 pci_uio_map_resource(struct rte_pci_device *dev)
470 char dirname[PATH_MAX];
471 char filename[PATH_MAX];
472 char dirname2[PATH_MAX];
473 char devname[PATH_MAX]; /* contains the /dev/uioX */
476 unsigned long start,size;
481 struct rte_pci_addr *loc = &dev->addr;
482 struct uio_resource *uio_res;
483 struct uio_map *maps;
485 dev->intr_handle.fd = -1;
487 /* secondary processes - use already recorded details */
488 if ((rte_eal_process_type() != RTE_PROC_PRIMARY) &&
489 (dev->id.vendor_id != PCI_VENDOR_ID_QUMRANET))
490 return (pci_uio_map_secondary(dev));
492 /* depending on kernel version, uio can be located in uio/uioX
495 rte_snprintf(dirname, sizeof(dirname),
496 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/uio",
497 loc->domain, loc->bus, loc->devid, loc->function);
499 dir = opendir(dirname);
501 /* retry with the parent directory */
502 rte_snprintf(dirname, sizeof(dirname),
503 SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
504 loc->domain, loc->bus, loc->devid, loc->function);
505 dir = opendir(dirname);
508 RTE_LOG(ERR, EAL, "Cannot opendir %s\n", dirname);
513 /* take the first file starting with "uio" */
514 while ((e = readdir(dir)) != NULL) {
515 /* format could be uio%d ...*/
516 int shortprefix_len = sizeof("uio") - 1;
517 /* ... or uio:uio%d */
518 int longprefix_len = sizeof("uio:uio") - 1;
521 if (strncmp(e->d_name, "uio", 3) != 0)
524 /* first try uio%d */
526 uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
527 if (errno == 0 && endptr != (e->d_name + shortprefix_len)) {
528 rte_snprintf(dirname2, sizeof(dirname2),
529 "%s/uio%u", dirname, uio_num);
533 /* then try uio:uio%d */
535 uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
536 if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
537 rte_snprintf(dirname2, sizeof(dirname2),
538 "%s/uio:uio%u", dirname, uio_num);
544 /* No uio resource found */
546 RTE_LOG(WARNING, EAL, " "PCI_PRI_FMT" not managed by UIO driver, "
547 "skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
551 if(dev->id.vendor_id == PCI_VENDOR_ID_QUMRANET) {
552 /* get portio size */
553 rte_snprintf(filename, sizeof(filename),
554 "%s/portio/port0/size", dirname2);
555 if (eal_parse_sysfs_value(filename, &size) < 0) {
556 RTE_LOG(ERR, EAL, "%s(): cannot parse size\n",
561 /* get portio start */
562 rte_snprintf(filename, sizeof(filename),
563 "%s/portio/port0/start", dirname2);
564 if (eal_parse_sysfs_value(filename, &start) < 0) {
565 RTE_LOG(ERR, EAL, "%s(): cannot parse portio start\n",
569 dev->mem_resource[0].addr = (void *)(uintptr_t)start;
570 dev->mem_resource[0].len = (uint64_t)size;
571 RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%lx with size=0x%lx\n", start, size);
572 /* rte_virtio_pmd does not need any other bar even if available */
576 /* allocate the mapping details for secondary processes*/
577 if ((uio_res = rte_zmalloc("UIO_RES", sizeof (*uio_res), 0)) == NULL) {
579 "%s(): cannot store uio mmap details\n", __func__);
583 rte_snprintf(devname, sizeof(devname), "/dev/uio%u", uio_num);
584 rte_snprintf(uio_res->path, sizeof(uio_res->path), "%s", devname);
585 memcpy(&uio_res->pci_addr, &dev->addr, sizeof(uio_res->pci_addr));
587 /* collect info about device mappings */
588 if ((nb_maps = pci_uio_get_mappings(dirname2, uio_res->maps,
589 sizeof (uio_res->maps) / sizeof (uio_res->maps[0])))
593 uio_res->nb_maps = nb_maps;
596 pagesz = sysconf(_SC_PAGESIZE);
598 maps = uio_res->maps;
599 for (i = 0; i != PCI_MAX_RESOURCE; i++) {
602 if ((phaddr = dev->mem_resource[i].phys_addr) == 0)
605 for (j = 0; j != nb_maps && (phaddr != maps[j].phaddr ||
606 dev->mem_resource[i].len != maps[j].size);
610 /* if matching map is found, then use it */
613 if (maps[j].addr != NULL ||
614 (mapaddr = pci_map_resource(dev,
615 NULL, devname, (off_t)offset,
616 (size_t)maps[j].size)) == NULL) {
620 maps[j].addr = mapaddr;
621 maps[j].offset = offset;
622 dev->mem_resource[i].addr = mapaddr;
626 TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
631 /* parse the "resource" sysfs file */
632 #define IORESOURCE_MEM 0x00000200
635 pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
639 union pci_resource_info {
645 char *ptrs[PCI_RESOURCE_FMT_NVAL];
648 uint64_t phys_addr, end_addr, flags;
650 f = fopen(filename, "r");
652 RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n");
656 for (i = 0; i<PCI_MAX_RESOURCE; i++) {
658 if (fgets(buf, sizeof(buf), f) == NULL) {
660 "%s(): cannot read resource\n", __func__);
664 if (rte_strsplit(buf, sizeof(buf), res_info.ptrs, 3, ' ') != 3) {
666 "%s(): bad resource format\n", __func__);
670 phys_addr = strtoull(res_info.phys_addr, NULL, 16);
671 end_addr = strtoull(res_info.end_addr, NULL, 16);
672 flags = strtoull(res_info.flags, NULL, 16);
675 "%s(): bad resource format\n", __func__);
679 if (flags & IORESOURCE_MEM) {
680 dev->mem_resource[i].phys_addr = phys_addr;
681 dev->mem_resource[i].len = end_addr - phys_addr + 1;
682 /* not mapped for now */
683 dev->mem_resource[i].addr = NULL;
695 * parse a sysfs file containing one integer value
696 * different to the eal version, as it needs to work with 64-bit values
699 pci_parse_sysfs_value(const char *filename, uint64_t *val)
705 f = fopen(filename, "r");
707 RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
712 if (fgets(buf, sizeof(buf), f) == NULL) {
713 RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
718 *val = strtoull(buf, &end, 0);
719 if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
720 RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
729 /* Compare two PCI device addresses. */
731 pci_addr_comparison(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
733 uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) + (addr->devid << 8) + addr->function;
734 uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) + (addr2->devid << 8) + addr2->function;
736 if (dev_addr > dev_addr2)
743 /* Scan one pci sysfs entry, and fill the devices list from it. */
745 pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
746 uint8_t devid, uint8_t function)
748 char filename[PATH_MAX];
750 struct rte_pci_device *dev;
752 dev = malloc(sizeof(*dev));
757 memset(dev, 0, sizeof(*dev));
758 dev->addr.domain = domain;
760 dev->addr.devid = devid;
761 dev->addr.function = function;
764 rte_snprintf(filename, sizeof(filename), "%s/vendor", dirname);
765 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
769 dev->id.vendor_id = (uint16_t)tmp;
772 rte_snprintf(filename, sizeof(filename), "%s/device", dirname);
773 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
777 dev->id.device_id = (uint16_t)tmp;
779 /* get subsystem_vendor id */
780 rte_snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
782 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
786 dev->id.subsystem_vendor_id = (uint16_t)tmp;
788 /* get subsystem_device id */
789 rte_snprintf(filename, sizeof(filename), "%s/subsystem_device",
791 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
795 dev->id.subsystem_device_id = (uint16_t)tmp;
799 rte_snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
800 if (!access(filename, F_OK) &&
801 eal_parse_sysfs_value(filename, &tmp) == 0) {
802 dev->max_vfs = (uint16_t)tmp;
806 rte_snprintf(filename, sizeof(filename), "%s/numa_node",
808 if (access(filename, R_OK) != 0) {
809 /* if no NUMA support just set node to 0 */
812 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
816 dev->numa_node = tmp;
819 /* parse resources */
820 rte_snprintf(filename, sizeof(filename), "%s/resource", dirname);
821 if (pci_parse_sysfs_resource(filename, dev) < 0) {
822 RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
827 /* device is valid, add in list (sorted) */
828 if (TAILQ_EMPTY(&device_list)) {
829 TAILQ_INSERT_TAIL(&device_list, dev, next);
832 struct rte_pci_device *dev2 = NULL;
834 TAILQ_FOREACH(dev2, &device_list, next) {
835 if (pci_addr_comparison(&dev->addr, &dev2->addr))
838 TAILQ_INSERT_BEFORE(dev2, dev, next);
842 TAILQ_INSERT_TAIL(&device_list, dev, next);
849 * split up a pci address into its constituent parts.
852 parse_pci_addr_format(const char *buf, int bufsize, uint16_t *domain,
853 uint8_t *bus, uint8_t *devid, uint8_t *function)
855 /* first split on ':' */
863 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
866 char *buf_copy = strndup(buf, bufsize);
867 if (buf_copy == NULL)
870 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
873 /* final split is on '.' between devid and function */
874 splitaddr.function = strchr(splitaddr.devid,'.');
875 if (splitaddr.function == NULL)
877 *splitaddr.function++ = '\0';
879 /* now convert to int values */
881 *domain = (uint16_t)strtoul(splitaddr.domain, NULL, 16);
882 *bus = (uint8_t)strtoul(splitaddr.bus, NULL, 16);
883 *devid = (uint8_t)strtoul(splitaddr.devid, NULL, 16);
884 *function = (uint8_t)strtoul(splitaddr.function, NULL, 10);
888 free(buf_copy); /* free the copy made with strdup */
896 * Scan the content of the PCI bus, and the devices in the devices
904 char dirname[PATH_MAX];
906 uint8_t bus, devid, function;
908 dir = opendir(SYSFS_PCI_DEVICES);
910 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n",
911 __func__, strerror(errno));
915 while ((e = readdir(dir)) != NULL) {
916 if (e->d_name[0] == '.')
919 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &domain,
920 &bus, &devid, &function) != 0)
923 rte_snprintf(dirname, sizeof(dirname), "%s/%s", SYSFS_PCI_DEVICES,
925 if (pci_scan_one(dirname, domain, bus, devid, function) < 0)
937 * If vendor/device ID match, call the devinit() function of the
941 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
943 struct rte_pci_id *id_table;
944 #ifdef RTE_EAL_UNBIND_PORTS
945 const char *module_name = NULL;
948 if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO)
949 module_name = IGB_UIO_NAME;
952 for (id_table = dr->id_table ; id_table->vendor_id != 0; id_table++) {
954 /* check if device's identifiers match the driver's ones */
955 if (id_table->vendor_id != dev->id.vendor_id &&
956 id_table->vendor_id != PCI_ANY_ID)
958 if (id_table->device_id != dev->id.device_id &&
959 id_table->device_id != PCI_ANY_ID)
961 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
962 id_table->subsystem_vendor_id != PCI_ANY_ID)
964 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
965 id_table->subsystem_device_id != PCI_ANY_ID)
968 struct rte_pci_addr *loc = &dev->addr;
970 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
971 loc->domain, loc->bus, loc->devid, loc->function,
974 RTE_LOG(DEBUG, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
975 dev->id.device_id, dr->name);
977 /* no initialization when blacklisted, return without error */
978 if (dev->blacklisted) {
979 RTE_LOG(DEBUG, EAL, " Device is blacklisted, not initializing\n");
983 #ifdef RTE_EAL_UNBIND_PORTS
984 /* Unbind PCI devices if needed */
985 if (module_name != NULL)
986 if (pci_switch_module(dr, dev, uio_status, module_name) < 0)
989 /* just map the NIC resources */
990 if (pci_uio_map_resource(dev) < 0)
994 /* We always should have BAR0 mapped */
995 if (rte_eal_process_type() == RTE_PROC_PRIMARY &&
996 dev->mem_resource[0].addr == NULL) {
998 "%s(): BAR0 is not mapped\n",
1003 /* reference driver structure */
1006 /* call the driver devinit() function */
1007 return dr->devinit(dr, dev);
1009 /* return positive value if driver is not found */
1013 /* Init the PCI EAL subsystem */
1015 rte_eal_pci_init(void)
1017 TAILQ_INIT(&driver_list);
1018 TAILQ_INIT(&device_list);
1019 uio_res_list = RTE_TAILQ_RESERVE_BY_IDX(RTE_TAILQ_PCI, uio_res_list);
1021 /* for debug purposes, PCI can be disabled */
1022 if (internal_config.no_pci)
1025 if (pci_scan() < 0) {
1026 RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__);