1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
12 #include <sys/types.h>
18 #include <sys/queue.h>
20 #include <sys/ioctl.h>
21 #include <sys/pciio.h>
22 #include <dev/pci/pcireg.h>
24 #if defined(RTE_ARCH_X86)
25 #include <machine/cpufunc.h>
28 #include <rte_interrupts.h>
31 #include <rte_bus_pci.h>
32 #include <rte_common.h>
33 #include <rte_launch.h>
34 #include <rte_memory.h>
36 #include <rte_eal_memconfig.h>
37 #include <rte_per_lcore.h>
38 #include <rte_lcore.h>
39 #include <rte_malloc.h>
40 #include <rte_string_fns.h>
41 #include <rte_debug.h>
42 #include <rte_devargs.h>
44 #include "eal_filesystem.h"
49 * PCI probing under BSD
51 * This code is used to simulate a PCI probe by parsing information in
52 * sysfs. Moreover, when a registered driver matches a device, the
53 * kernel driver currently using it is unloaded and replaced by
54 * igb_uio module, which is a very minimal userland driver for Intel
55 * network card, only providing access to PCI BAR to applications, and
56 * enabling bus master.
59 extern struct rte_pci_bus rte_pci_bus;
63 rte_pci_map_device(struct rte_pci_device *dev)
67 /* try mapping the NIC resources */
69 case RTE_KDRV_NIC_UIO:
70 /* map resources for devices that use uio */
71 ret = pci_uio_map_resource(dev);
75 " Not managed by a supported kernel driver, skipped\n");
83 /* Unmap pci device */
85 rte_pci_unmap_device(struct rte_pci_device *dev)
87 /* try unmapping the NIC resources */
89 case RTE_KDRV_NIC_UIO:
90 /* unmap resources for devices that use uio */
91 pci_uio_unmap_resource(dev);
95 " Not managed by a supported kernel driver, skipped\n");
101 pci_uio_free_resource(struct rte_pci_device *dev,
102 struct mapped_pci_resource *uio_res)
106 if (dev->intr_handle.fd) {
107 close(dev->intr_handle.fd);
108 dev->intr_handle.fd = -1;
109 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
114 pci_uio_alloc_resource(struct rte_pci_device *dev,
115 struct mapped_pci_resource **uio_res)
117 char devname[PATH_MAX]; /* contains the /dev/uioX */
118 struct rte_pci_addr *loc;
122 snprintf(devname, sizeof(devname), "/dev/uio@pci:%u:%u:%u",
123 dev->addr.bus, dev->addr.devid, dev->addr.function);
125 if (access(devname, O_RDWR) < 0) {
126 RTE_LOG(WARNING, EAL, " "PCI_PRI_FMT" not managed by UIO driver, "
127 "skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
131 /* save fd if in primary process */
132 dev->intr_handle.fd = open(devname, O_RDWR);
133 if (dev->intr_handle.fd < 0) {
134 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
135 devname, strerror(errno));
138 dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
140 /* allocate the mapping details for secondary processes*/
141 *uio_res = rte_zmalloc("UIO_RES", sizeof(**uio_res), 0);
142 if (*uio_res == NULL) {
144 "%s(): cannot store uio mmap details\n", __func__);
148 strlcpy((*uio_res)->path, devname, sizeof((*uio_res)->path));
149 memcpy(&(*uio_res)->pci_addr, &dev->addr, sizeof((*uio_res)->pci_addr));
154 pci_uio_free_resource(dev, *uio_res);
159 pci_uio_map_resource_by_index(struct rte_pci_device *dev, int res_idx,
160 struct mapped_pci_resource *uio_res, int map_idx)
167 struct pci_map *maps;
169 maps = uio_res->maps;
170 devname = uio_res->path;
171 pagesz = sysconf(_SC_PAGESIZE);
173 /* allocate memory to keep path */
174 maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
175 if (maps[map_idx].path == NULL) {
176 RTE_LOG(ERR, EAL, "Cannot allocate memory for path: %s\n",
182 * open resource file, to mmap it
184 fd = open(devname, O_RDWR);
186 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
187 devname, strerror(errno));
191 /* if matching map is found, then use it */
192 offset = res_idx * pagesz;
193 mapaddr = pci_map_resource(NULL, fd, (off_t)offset,
194 (size_t)dev->mem_resource[res_idx].len, 0);
196 if (mapaddr == MAP_FAILED)
199 maps[map_idx].phaddr = dev->mem_resource[res_idx].phys_addr;
200 maps[map_idx].size = dev->mem_resource[res_idx].len;
201 maps[map_idx].addr = mapaddr;
202 maps[map_idx].offset = offset;
203 strcpy(maps[map_idx].path, devname);
204 dev->mem_resource[res_idx].addr = mapaddr;
209 rte_free(maps[map_idx].path);
214 pci_scan_one(int dev_pci_fd, struct pci_conf *conf)
216 struct rte_pci_device *dev;
217 struct pci_bar_io bar;
220 dev = malloc(sizeof(*dev));
225 memset(dev, 0, sizeof(*dev));
226 dev->device.bus = &rte_pci_bus.bus;
228 dev->addr.domain = conf->pc_sel.pc_domain;
229 dev->addr.bus = conf->pc_sel.pc_bus;
230 dev->addr.devid = conf->pc_sel.pc_dev;
231 dev->addr.function = conf->pc_sel.pc_func;
234 dev->id.vendor_id = conf->pc_vendor;
237 dev->id.device_id = conf->pc_device;
239 /* get subsystem_vendor id */
240 dev->id.subsystem_vendor_id = conf->pc_subvendor;
242 /* get subsystem_device id */
243 dev->id.subsystem_device_id = conf->pc_subdevice;
246 dev->id.class_id = (conf->pc_class << 16) |
247 (conf->pc_subclass << 8) |
250 /* TODO: get max_vfs */
253 /* FreeBSD has no NUMA support (yet) */
254 dev->device.numa_node = 0;
258 /* FreeBSD has only one pass through driver */
259 dev->kdrv = RTE_KDRV_NIC_UIO;
261 /* parse resources */
262 switch (conf->pc_hdr & PCIM_HDRTYPE) {
263 case PCIM_HDRTYPE_NORMAL:
264 max = PCIR_MAX_BAR_0;
266 case PCIM_HDRTYPE_BRIDGE:
267 max = PCIR_MAX_BAR_1;
269 case PCIM_HDRTYPE_CARDBUS:
270 max = PCIR_MAX_BAR_2;
276 for (i = 0; i <= max; i++) {
277 bar.pbi_sel = conf->pc_sel;
278 bar.pbi_reg = PCIR_BAR(i);
279 if (ioctl(dev_pci_fd, PCIOCGETBAR, &bar) < 0)
282 dev->mem_resource[i].len = bar.pbi_length;
283 if (PCI_BAR_IO(bar.pbi_base)) {
284 dev->mem_resource[i].addr = (void *)(bar.pbi_base & ~((uint64_t)0xf));
287 dev->mem_resource[i].phys_addr = bar.pbi_base & ~((uint64_t)0xf);
290 /* device is valid, add in list (sorted) */
291 if (TAILQ_EMPTY(&rte_pci_bus.device_list)) {
292 rte_pci_add_device(dev);
295 struct rte_pci_device *dev2 = NULL;
298 TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) {
299 ret = rte_pci_addr_cmp(&dev->addr, &dev2->addr);
303 rte_pci_insert_device(dev2, dev);
304 } else { /* already registered */
305 dev2->kdrv = dev->kdrv;
306 dev2->max_vfs = dev->max_vfs;
308 memmove(dev2->mem_resource,
310 sizeof(dev->mem_resource));
315 rte_pci_add_device(dev);
326 * Scan the content of the PCI bus, and add the devices in the devices
327 * list. Call pci_scan_one() for each pci entry found.
333 unsigned dev_count = 0;
334 struct pci_conf matches[16];
335 struct pci_conf_io conf_io = {
339 .match_buf_len = sizeof(matches),
340 .matches = &matches[0],
343 /* for debug purposes, PCI can be disabled */
344 if (!rte_eal_has_pci())
347 fd = open("/dev/pci", O_RDONLY);
349 RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
355 if (ioctl(fd, PCIOCGETCONF, &conf_io) < 0) {
356 RTE_LOG(ERR, EAL, "%s(): error with ioctl on /dev/pci: %s\n",
357 __func__, strerror(errno));
361 for (i = 0; i < conf_io.num_matches; i++)
362 if (pci_scan_one(fd, &matches[i]) < 0)
365 dev_count += conf_io.num_matches;
366 } while(conf_io.status == PCI_GETCONF_MORE_DEVS);
370 RTE_LOG(DEBUG, EAL, "PCI scan found %u devices\n", dev_count);
380 pci_device_iova_mode(const struct rte_pci_driver *pdrv __rte_unused,
381 const struct rte_pci_device *pdev)
383 /* Supports only RTE_KDRV_NIC_UIO */
384 if (pdev->kdrv != RTE_KDRV_NIC_UIO)
385 RTE_LOG(DEBUG, EAL, "Unsupported kernel driver? Defaulting to IOVA as 'PA'\n");
391 pci_update_device(const struct rte_pci_addr *addr)
394 struct pci_conf matches[2];
395 struct pci_match_conf match = {
397 .pc_domain = addr->domain,
399 .pc_dev = addr->devid,
400 .pc_func = addr->function,
403 struct pci_conf_io conf_io = {
407 .match_buf_len = sizeof(matches),
408 .matches = &matches[0],
411 fd = open("/dev/pci", O_RDONLY);
413 RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
417 if (ioctl(fd, PCIOCGETCONF, &conf_io) < 0) {
418 RTE_LOG(ERR, EAL, "%s(): error with ioctl on /dev/pci: %s\n",
419 __func__, strerror(errno));
423 if (conf_io.num_matches != 1)
426 if (pci_scan_one(fd, &matches[0]) < 0)
439 /* Read PCI config space. */
440 int rte_pci_read_config(const struct rte_pci_device *dev,
441 void *buf, size_t len, off_t offset)
445 /* Copy Linux implementation's behaviour */
446 const int return_len = len;
449 .pc_domain = dev->addr.domain,
450 .pc_bus = dev->addr.bus,
451 .pc_dev = dev->addr.devid,
452 .pc_func = dev->addr.function,
457 fd = open("/dev/pci", O_RDWR);
459 RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
464 size = (len >= 4) ? 4 : ((len >= 2) ? 2 : 1);
467 if (ioctl(fd, PCIOCREAD, &pi) < 0)
469 memcpy(buf, &pi.pi_data, size);
471 buf = (char *)buf + size;
485 /* Write PCI config space. */
486 int rte_pci_write_config(const struct rte_pci_device *dev,
487 const void *buf, size_t len, off_t offset)
493 .pc_domain = dev->addr.domain,
494 .pc_bus = dev->addr.bus,
495 .pc_dev = dev->addr.devid,
496 .pc_func = dev->addr.function,
499 .pi_data = *(const uint32_t *)buf,
503 if (len == 3 || len > sizeof(pi.pi_data)) {
504 RTE_LOG(ERR, EAL, "%s(): invalid pci read length\n", __func__);
508 memcpy(&pi.pi_data, buf, len);
510 fd = open("/dev/pci", O_RDWR);
512 RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
516 if (ioctl(fd, PCIOCWRITE, &pi) < 0)
529 rte_pci_ioport_map(struct rte_pci_device *dev, int bar,
530 struct rte_pci_ioport *p)
535 #if defined(RTE_ARCH_X86)
536 case RTE_KDRV_NIC_UIO:
537 if ((uintptr_t) dev->mem_resource[bar].addr <= UINT16_MAX) {
538 p->base = (uintptr_t)dev->mem_resource[bar].addr;
556 pci_uio_ioport_read(struct rte_pci_ioport *p,
557 void *data, size_t len, off_t offset)
559 #if defined(RTE_ARCH_X86)
562 unsigned short reg = p->base + offset;
564 for (d = data; len > 0; d += size, reg += size, len -= size) {
567 *(uint32_t *)d = inl(reg);
568 } else if (len >= 2) {
570 *(uint16_t *)d = inw(reg);
580 RTE_SET_USED(offset);
585 rte_pci_ioport_read(struct rte_pci_ioport *p,
586 void *data, size_t len, off_t offset)
588 switch (p->dev->kdrv) {
589 case RTE_KDRV_NIC_UIO:
590 pci_uio_ioport_read(p, data, len, offset);
598 pci_uio_ioport_write(struct rte_pci_ioport *p,
599 const void *data, size_t len, off_t offset)
601 #if defined(RTE_ARCH_X86)
604 unsigned short reg = p->base + offset;
606 for (s = data; len > 0; s += size, reg += size, len -= size) {
609 outl(reg, *(const uint32_t *)s);
610 } else if (len >= 2) {
612 outw(reg, *(const uint16_t *)s);
622 RTE_SET_USED(offset);
627 rte_pci_ioport_write(struct rte_pci_ioport *p,
628 const void *data, size_t len, off_t offset)
630 switch (p->dev->kdrv) {
631 case RTE_KDRV_NIC_UIO:
632 pci_uio_ioport_write(p, data, len, offset);
640 rte_pci_ioport_unmap(struct rte_pci_ioport *p)
644 switch (p->dev->kdrv) {
645 #if defined(RTE_ARCH_X86)
646 case RTE_KDRV_NIC_UIO: