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>
51 #include <sys/pciio.h>
52 #include <dev/pci/pcireg.h>
54 #include <rte_interrupts.h>
57 #include <rte_common.h>
58 #include <rte_launch.h>
59 #include <rte_memory.h>
60 #include <rte_memzone.h>
62 #include <rte_eal_memconfig.h>
63 #include <rte_per_lcore.h>
64 #include <rte_lcore.h>
65 #include <rte_malloc.h>
66 #include <rte_string_fns.h>
67 #include <rte_debug.h>
68 #include <rte_devargs.h>
70 #include "rte_pci_dev_ids.h"
71 #include "eal_filesystem.h"
72 #include "eal_private.h"
76 * PCI probing under linux
78 * This code is used to simulate a PCI probe by parsing information in
79 * sysfs. Moreover, when a registered driver matches a device, the
80 * kernel driver currently using it is unloaded and replaced by
81 * igb_uio module, which is a very minimal userland driver for Intel
82 * network card, only providing access to PCI BAR to applications, and
83 * enabling bus master.
94 * For multi-process we need to reproduce all PCI mappings in secondary
95 * processes, so save them in a tailq.
98 TAILQ_ENTRY(uio_resource) next;
100 struct rte_pci_addr pci_addr;
103 struct uio_map maps[PCI_MAX_RESOURCE];
106 TAILQ_HEAD(uio_res_list, uio_resource);
108 static struct uio_res_list *uio_res_list = NULL;
110 /* unbind kernel driver for this device */
112 pci_unbind_kernel_driver(struct rte_pci_device *dev __rte_unused)
114 RTE_LOG(ERR, EAL, "RTE_PCI_DRV_FORCE_UNBIND flag is not implemented "
119 /* map a particular resource from a file */
121 pci_map_resource(void *requested_addr, const char *devname, off_t offset,
128 * open devname, to mmap it
130 fd = open(devname, O_RDWR);
132 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
133 devname, strerror(errno));
137 /* Map the PCI memory resource of device */
138 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
139 MAP_SHARED, fd, offset);
141 if (mapaddr == MAP_FAILED ||
142 (requested_addr != NULL && mapaddr != requested_addr)) {
143 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%s(%d), %p, 0x%lx, 0x%lx):"
144 " %s (%p)\n", __func__, devname, fd, requested_addr,
145 (unsigned long)size, (unsigned long)offset,
146 strerror(errno), mapaddr);
150 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
159 pci_uio_map_secondary(struct rte_pci_device *dev)
162 struct uio_resource *uio_res;
164 TAILQ_FOREACH(uio_res, uio_res_list, next) {
166 /* skip this element if it doesn't match our PCI address */
167 if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
170 for (i = 0; i != uio_res->nb_maps; i++) {
171 if (pci_map_resource(uio_res->maps[i].addr,
173 (off_t)uio_res->maps[i].offset,
174 (size_t)uio_res->maps[i].size)
175 != uio_res->maps[i].addr) {
177 "Cannot mmap device resource\n");
184 RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
188 /* map the PCI resource of a PCI device in virtual memory */
190 pci_uio_map_resource(struct rte_pci_device *dev)
193 char devname[PATH_MAX]; /* contains the /dev/uioX */
198 struct rte_pci_addr *loc = &dev->addr;
199 struct uio_resource *uio_res;
200 struct uio_map *maps;
202 dev->intr_handle.fd = -1;
203 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
205 /* secondary processes - use already recorded details */
206 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
207 return (pci_uio_map_secondary(dev));
209 snprintf(devname, sizeof(devname), "/dev/uio@pci:%u:%u:%u",
210 dev->addr.bus, dev->addr.devid, dev->addr.function);
212 if (access(devname, O_RDWR) < 0) {
213 RTE_LOG(WARNING, EAL, " "PCI_PRI_FMT" not managed by UIO driver, "
214 "skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
218 /* save fd if in primary process */
219 dev->intr_handle.fd = open(devname, O_RDWR);
220 if (dev->intr_handle.fd < 0) {
221 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
222 devname, strerror(errno));
225 dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
227 /* allocate the mapping details for secondary processes*/
228 if ((uio_res = rte_zmalloc("UIO_RES", sizeof (*uio_res), 0)) == NULL) {
230 "%s(): cannot store uio mmap details\n", __func__);
234 snprintf(uio_res->path, sizeof(uio_res->path), "%s", devname);
235 memcpy(&uio_res->pci_addr, &dev->addr, sizeof(uio_res->pci_addr));
239 pagesz = sysconf(_SC_PAGESIZE);
241 maps = uio_res->maps;
242 for (i = uio_res->nb_maps = 0; i != PCI_MAX_RESOURCE; i++) {
244 j = uio_res->nb_maps;
246 if ((phaddr = dev->mem_resource[i].phys_addr) == 0)
249 /* if matching map is found, then use it */
251 maps[j].offset = offset;
252 maps[j].phaddr = dev->mem_resource[i].phys_addr;
253 maps[j].size = dev->mem_resource[i].len;
254 if (maps[j].addr != NULL ||
255 (mapaddr = pci_map_resource(NULL, devname, (off_t)offset,
256 (size_t)maps[j].size)
262 maps[j].addr = mapaddr;
264 dev->mem_resource[i].addr = mapaddr;
267 TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
272 /* Scan one pci sysfs entry, and fill the devices list from it. */
274 pci_scan_one(int dev_pci_fd, struct pci_conf *conf)
276 struct rte_pci_device *dev;
277 struct pci_bar_io bar;
280 dev = malloc(sizeof(*dev));
285 memset(dev, 0, sizeof(*dev));
286 dev->addr.domain = conf->pc_sel.pc_domain;
287 dev->addr.bus = conf->pc_sel.pc_bus;
288 dev->addr.devid = conf->pc_sel.pc_dev;
289 dev->addr.function = conf->pc_sel.pc_func;
292 dev->id.vendor_id = conf->pc_vendor;
295 dev->id.device_id = conf->pc_device;
297 /* get subsystem_vendor id */
298 dev->id.subsystem_vendor_id = conf->pc_subvendor;
300 /* get subsystem_device id */
301 dev->id.subsystem_device_id = conf->pc_subdevice;
303 /* TODO: get max_vfs */
306 /* FreeBSD has no NUMA support (yet) */
309 /* parse resources */
310 switch (conf->pc_hdr & PCIM_HDRTYPE) {
311 case PCIM_HDRTYPE_NORMAL:
312 max = PCIR_MAX_BAR_0;
314 case PCIM_HDRTYPE_BRIDGE:
315 max = PCIR_MAX_BAR_1;
317 case PCIM_HDRTYPE_CARDBUS:
318 max = PCIR_MAX_BAR_2;
324 for (i = 0; i <= max; i++) {
325 bar.pbi_sel = conf->pc_sel;
326 bar.pbi_reg = PCIR_BAR(i);
327 if (ioctl(dev_pci_fd, PCIOCGETBAR, &bar) < 0)
330 dev->mem_resource[i].len = bar.pbi_length;
331 if (PCI_BAR_IO(bar.pbi_base)) {
332 dev->mem_resource[i].addr = (void *)(bar.pbi_base & ~((uint64_t)0xf));
335 dev->mem_resource[i].phys_addr = bar.pbi_base & ~((uint64_t)0xf);
338 /* device is valid, add in list (sorted) */
339 if (TAILQ_EMPTY(&pci_device_list)) {
340 TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
343 struct rte_pci_device *dev2 = NULL;
346 TAILQ_FOREACH(dev2, &pci_device_list, next) {
347 ret = rte_eal_compare_pci_addr(&dev->addr, &dev2->addr);
351 TAILQ_INSERT_BEFORE(dev2, dev, next);
353 } else { /* already registered */
354 /* update pt_driver */
355 dev2->pt_driver = dev->pt_driver;
356 dev2->max_vfs = dev->max_vfs;
357 memmove(dev2->mem_resource,
359 sizeof(dev->mem_resource));
364 TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
375 * Scan the content of the PCI bus, and add the devices in the devices
376 * list. Call pci_scan_one() for each pci entry found.
382 unsigned dev_count = 0;
383 struct pci_conf matches[16];
384 struct pci_conf_io conf_io = {
388 .match_buf_len = sizeof(matches),
389 .matches = &matches[0],
392 fd = open("/dev/pci", O_RDONLY);
394 RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
400 if (ioctl(fd, PCIOCGETCONF, &conf_io) < 0) {
401 RTE_LOG(ERR, EAL, "%s(): error with ioctl on /dev/pci: %s\n",
402 __func__, strerror(errno));
406 for (i = 0; i < conf_io.num_matches; i++)
407 if (pci_scan_one(fd, &matches[i]) < 0)
410 dev_count += conf_io.num_matches;
411 } while(conf_io.status == PCI_GETCONF_MORE_DEVS);
415 RTE_LOG(ERR, EAL, "PCI scan found %u devices\n", dev_count);
425 * If vendor/device ID match, call the devinit() function of the
429 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
431 struct rte_pci_id *id_table;
434 for (id_table = dr->id_table ; id_table->vendor_id != 0; id_table++) {
436 /* check if device's identifiers match the driver's ones */
437 if (id_table->vendor_id != dev->id.vendor_id &&
438 id_table->vendor_id != PCI_ANY_ID)
440 if (id_table->device_id != dev->id.device_id &&
441 id_table->device_id != PCI_ANY_ID)
443 if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
444 id_table->subsystem_vendor_id != PCI_ANY_ID)
446 if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
447 id_table->subsystem_device_id != PCI_ANY_ID)
450 struct rte_pci_addr *loc = &dev->addr;
452 RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
453 loc->domain, loc->bus, loc->devid, loc->function,
456 RTE_LOG(DEBUG, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
457 dev->id.device_id, dr->name);
459 /* no initialization when blacklisted, return without error */
460 if (dev->devargs != NULL &&
461 dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
463 RTE_LOG(DEBUG, EAL, " Device is blacklisted, not initializing\n");
467 if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
468 /* map resources for devices that use igb_uio */
469 ret = pci_uio_map_resource(dev);
472 } else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
473 rte_eal_process_type() == RTE_PROC_PRIMARY) {
474 /* unbind current driver */
475 if (pci_unbind_kernel_driver(dev) < 0)
479 /* reference driver structure */
482 /* call the driver devinit() function */
483 return dr->devinit(dr, dev);
485 /* return positive value if driver is not found */
489 /* Init the PCI EAL subsystem */
491 rte_eal_pci_init(void)
493 TAILQ_INIT(&pci_driver_list);
494 TAILQ_INIT(&pci_device_list);
495 uio_res_list = RTE_TAILQ_LOOKUP_BY_IDX(RTE_TAILQ_PCI, uio_res_list);
497 /* for debug purposes, PCI can be disabled */
498 if (internal_config.no_pci)
501 if (pci_scan() < 0) {
502 RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__);