1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
3 */
4
5 #include <string.h>
6 #include <dirent.h>
7
8 #include <rte_log.h>
9 #include <rte_bus.h>
10 #include <rte_pci.h>
11 #include <rte_bus_pci.h>
12 #include <rte_malloc.h>
13 #include <rte_devargs.h>
14 #include <rte_memcpy.h>
15 #include <rte_vfio.h>
16
17 #include "eal_filesystem.h"
18
19 #include "private.h"
20 #include "pci_init.h"
21
22 /**
23 * @file
24 * PCI probing under linux
25 *
26 * This code is used to simulate a PCI probe by parsing information in sysfs.
27 * When a registered device matches a driver, it is then initialized with
28 * IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it).
29 */
30
31 extern struct rte_pci_bus rte_pci_bus;
32
33 static int
pci_get_kernel_driver_by_path(const char * filename,char * dri_name,size_t len)34 pci_get_kernel_driver_by_path(const char *filename, char *dri_name,
35 size_t len)
36 {
37 int count;
38 char path[PATH_MAX];
39 char *name;
40
41 if (!filename || !dri_name)
42 return -1;
43
44 count = readlink(filename, path, PATH_MAX);
45 if (count >= PATH_MAX)
46 return -1;
47
48 /* For device does not have a driver */
49 if (count < 0)
50 return 1;
51
52 path[count] = '\0';
53
54 name = strrchr(path, '/');
55 if (name) {
56 strlcpy(dri_name, name + 1, len);
57 return 0;
58 }
59
60 return -1;
61 }
62
63 /* Map pci device */
64 int
rte_pci_map_device(struct rte_pci_device * dev)65 rte_pci_map_device(struct rte_pci_device *dev)
66 {
67 int ret = -1;
68
69 /* try mapping the NIC resources using VFIO if it exists */
70 switch (dev->kdrv) {
71 case RTE_PCI_KDRV_VFIO:
72 #ifdef VFIO_PRESENT
73 if (pci_vfio_is_enabled())
74 ret = pci_vfio_map_resource(dev);
75 #endif
76 break;
77 case RTE_PCI_KDRV_IGB_UIO:
78 case RTE_PCI_KDRV_UIO_GENERIC:
79 if (rte_eal_using_phys_addrs()) {
80 /* map resources for devices that use uio */
81 ret = pci_uio_map_resource(dev);
82 }
83 break;
84 default:
85 RTE_LOG(DEBUG, EAL,
86 " Not managed by a supported kernel driver, skipped\n");
87 ret = 1;
88 break;
89 }
90
91 return ret;
92 }
93
94 /* Unmap pci device */
95 void
rte_pci_unmap_device(struct rte_pci_device * dev)96 rte_pci_unmap_device(struct rte_pci_device *dev)
97 {
98 /* try unmapping the NIC resources using VFIO if it exists */
99 switch (dev->kdrv) {
100 case RTE_PCI_KDRV_VFIO:
101 #ifdef VFIO_PRESENT
102 if (pci_vfio_is_enabled())
103 pci_vfio_unmap_resource(dev);
104 #endif
105 break;
106 case RTE_PCI_KDRV_IGB_UIO:
107 case RTE_PCI_KDRV_UIO_GENERIC:
108 /* unmap resources for devices that use uio */
109 pci_uio_unmap_resource(dev);
110 break;
111 default:
112 RTE_LOG(DEBUG, EAL,
113 " Not managed by a supported kernel driver, skipped\n");
114 break;
115 }
116 }
117
118 static int
find_max_end_va(const struct rte_memseg_list * msl,void * arg)119 find_max_end_va(const struct rte_memseg_list *msl, void *arg)
120 {
121 size_t sz = msl->len;
122 void *end_va = RTE_PTR_ADD(msl->base_va, sz);
123 void **max_va = arg;
124
125 if (*max_va < end_va)
126 *max_va = end_va;
127 return 0;
128 }
129
130 void *
pci_find_max_end_va(void)131 pci_find_max_end_va(void)
132 {
133 void *va = NULL;
134
135 rte_memseg_list_walk(find_max_end_va, &va);
136 return va;
137 }
138
139
140 /* parse one line of the "resource" sysfs file (note that the 'line'
141 * string is modified)
142 */
143 int
pci_parse_one_sysfs_resource(char * line,size_t len,uint64_t * phys_addr,uint64_t * end_addr,uint64_t * flags)144 pci_parse_one_sysfs_resource(char *line, size_t len, uint64_t *phys_addr,
145 uint64_t *end_addr, uint64_t *flags)
146 {
147 union pci_resource_info {
148 struct {
149 char *phys_addr;
150 char *end_addr;
151 char *flags;
152 };
153 char *ptrs[PCI_RESOURCE_FMT_NVAL];
154 } res_info;
155
156 if (rte_strsplit(line, len, res_info.ptrs, 3, ' ') != 3) {
157 RTE_LOG(ERR, EAL,
158 "%s(): bad resource format\n", __func__);
159 return -1;
160 }
161 errno = 0;
162 *phys_addr = strtoull(res_info.phys_addr, NULL, 16);
163 *end_addr = strtoull(res_info.end_addr, NULL, 16);
164 *flags = strtoull(res_info.flags, NULL, 16);
165 if (errno != 0) {
166 RTE_LOG(ERR, EAL,
167 "%s(): bad resource format\n", __func__);
168 return -1;
169 }
170
171 return 0;
172 }
173
174 /* parse the "resource" sysfs file */
175 static int
pci_parse_sysfs_resource(const char * filename,struct rte_pci_device * dev)176 pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
177 {
178 FILE *f;
179 char buf[BUFSIZ];
180 int i;
181 uint64_t phys_addr, end_addr, flags;
182
183 f = fopen(filename, "r");
184 if (f == NULL) {
185 RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n");
186 return -1;
187 }
188
189 for (i = 0; i<PCI_MAX_RESOURCE; i++) {
190
191 if (fgets(buf, sizeof(buf), f) == NULL) {
192 RTE_LOG(ERR, EAL,
193 "%s(): cannot read resource\n", __func__);
194 goto error;
195 }
196 if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr,
197 &end_addr, &flags) < 0)
198 goto error;
199
200 if (flags & IORESOURCE_MEM) {
201 dev->mem_resource[i].phys_addr = phys_addr;
202 dev->mem_resource[i].len = end_addr - phys_addr + 1;
203 /* not mapped for now */
204 dev->mem_resource[i].addr = NULL;
205 }
206 }
207 fclose(f);
208 return 0;
209
210 error:
211 fclose(f);
212 return -1;
213 }
214
215 /* Scan one pci sysfs entry, and fill the devices list from it. */
216 static int
pci_scan_one(const char * dirname,const struct rte_pci_addr * addr)217 pci_scan_one(const char *dirname, const struct rte_pci_addr *addr)
218 {
219 char filename[PATH_MAX];
220 unsigned long tmp;
221 struct rte_pci_device *dev;
222 char driver[PATH_MAX];
223 int ret;
224
225 dev = malloc(sizeof(*dev));
226 if (dev == NULL)
227 return -1;
228
229 memset(dev, 0, sizeof(*dev));
230 dev->device.bus = &rte_pci_bus.bus;
231 dev->addr = *addr;
232
233 /* get vendor id */
234 snprintf(filename, sizeof(filename), "%s/vendor", dirname);
235 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
236 free(dev);
237 return -1;
238 }
239 dev->id.vendor_id = (uint16_t)tmp;
240
241 /* get device id */
242 snprintf(filename, sizeof(filename), "%s/device", dirname);
243 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
244 free(dev);
245 return -1;
246 }
247 dev->id.device_id = (uint16_t)tmp;
248
249 /* get subsystem_vendor id */
250 snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
251 dirname);
252 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
253 free(dev);
254 return -1;
255 }
256 dev->id.subsystem_vendor_id = (uint16_t)tmp;
257
258 /* get subsystem_device id */
259 snprintf(filename, sizeof(filename), "%s/subsystem_device",
260 dirname);
261 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
262 free(dev);
263 return -1;
264 }
265 dev->id.subsystem_device_id = (uint16_t)tmp;
266
267 /* get class_id */
268 snprintf(filename, sizeof(filename), "%s/class",
269 dirname);
270 if (eal_parse_sysfs_value(filename, &tmp) < 0) {
271 free(dev);
272 return -1;
273 }
274 /* the least 24 bits are valid: class, subclass, program interface */
275 dev->id.class_id = (uint32_t)tmp & RTE_CLASS_ANY_ID;
276
277 /* get max_vfs */
278 dev->max_vfs = 0;
279 snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
280 if (!access(filename, F_OK) &&
281 eal_parse_sysfs_value(filename, &tmp) == 0)
282 dev->max_vfs = (uint16_t)tmp;
283 else {
284 /* for non igb_uio driver, need kernel version >= 3.8 */
285 snprintf(filename, sizeof(filename),
286 "%s/sriov_numvfs", dirname);
287 if (!access(filename, F_OK) &&
288 eal_parse_sysfs_value(filename, &tmp) == 0)
289 dev->max_vfs = (uint16_t)tmp;
290 }
291
292 /* get numa node, default to 0 if not present */
293 snprintf(filename, sizeof(filename), "%s/numa_node",
294 dirname);
295
296 if (access(filename, F_OK) != -1) {
297 if (eal_parse_sysfs_value(filename, &tmp) == 0)
298 dev->device.numa_node = tmp;
299 else
300 dev->device.numa_node = -1;
301 } else {
302 dev->device.numa_node = 0;
303 }
304
305 pci_name_set(dev);
306
307 /* parse resources */
308 snprintf(filename, sizeof(filename), "%s/resource", dirname);
309 if (pci_parse_sysfs_resource(filename, dev) < 0) {
310 RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
311 free(dev);
312 return -1;
313 }
314
315 /* parse driver */
316 snprintf(filename, sizeof(filename), "%s/driver", dirname);
317 ret = pci_get_kernel_driver_by_path(filename, driver, sizeof(driver));
318 if (ret < 0) {
319 RTE_LOG(ERR, EAL, "Fail to get kernel driver\n");
320 free(dev);
321 return -1;
322 }
323
324 if (!ret) {
325 if (!strcmp(driver, "vfio-pci"))
326 dev->kdrv = RTE_PCI_KDRV_VFIO;
327 else if (!strcmp(driver, "igb_uio"))
328 dev->kdrv = RTE_PCI_KDRV_IGB_UIO;
329 else if (!strcmp(driver, "uio_pci_generic"))
330 dev->kdrv = RTE_PCI_KDRV_UIO_GENERIC;
331 else
332 dev->kdrv = RTE_PCI_KDRV_UNKNOWN;
333 } else {
334 dev->kdrv = RTE_PCI_KDRV_NONE;
335 return 0;
336 }
337 /* device is valid, add in list (sorted) */
338 if (TAILQ_EMPTY(&rte_pci_bus.device_list)) {
339 rte_pci_add_device(dev);
340 } else {
341 struct rte_pci_device *dev2;
342 int ret;
343
344 TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) {
345 ret = rte_pci_addr_cmp(&dev->addr, &dev2->addr);
346 if (ret > 0)
347 continue;
348
349 if (ret < 0) {
350 rte_pci_insert_device(dev2, dev);
351 } else { /* already registered */
352 if (!rte_dev_is_probed(&dev2->device)) {
353 dev2->kdrv = dev->kdrv;
354 dev2->max_vfs = dev->max_vfs;
355 dev2->id = dev->id;
356 pci_name_set(dev2);
357 memmove(dev2->mem_resource,
358 dev->mem_resource,
359 sizeof(dev->mem_resource));
360 } else {
361 /**
362 * If device is plugged and driver is
363 * probed already, (This happens when
364 * we call rte_dev_probe which will
365 * scan all device on the bus) we don't
366 * need to do anything here unless...
367 **/
368 if (dev2->kdrv != dev->kdrv ||
369 dev2->max_vfs != dev->max_vfs ||
370 memcmp(&dev2->id, &dev->id, sizeof(dev2->id)))
371 /*
372 * This should not happens.
373 * But it is still possible if
374 * we unbind a device from
375 * vfio or uio before hotplug
376 * remove and rebind it with
377 * a different configure.
378 * So we just print out the
379 * error as an alarm.
380 */
381 RTE_LOG(ERR, EAL, "Unexpected device scan at %s!\n",
382 filename);
383 else if (dev2->device.devargs !=
384 dev->device.devargs) {
385 rte_devargs_remove(dev2->device.devargs);
386 pci_name_set(dev2);
387 }
388 }
389 free(dev);
390 }
391 return 0;
392 }
393
394 rte_pci_add_device(dev);
395 }
396
397 return 0;
398 }
399
400 /*
401 * split up a pci address into its constituent parts.
402 */
403 static int
parse_pci_addr_format(const char * buf,int bufsize,struct rte_pci_addr * addr)404 parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr)
405 {
406 /* first split on ':' */
407 union splitaddr {
408 struct {
409 char *domain;
410 char *bus;
411 char *devid;
412 char *function;
413 };
414 char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
415 } splitaddr;
416
417 char *buf_copy = strndup(buf, bufsize);
418 if (buf_copy == NULL)
419 return -1;
420
421 if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
422 != PCI_FMT_NVAL - 1)
423 goto error;
424 /* final split is on '.' between devid and function */
425 splitaddr.function = strchr(splitaddr.devid,'.');
426 if (splitaddr.function == NULL)
427 goto error;
428 *splitaddr.function++ = '\0';
429
430 /* now convert to int values */
431 errno = 0;
432 addr->domain = strtoul(splitaddr.domain, NULL, 16);
433 addr->bus = strtoul(splitaddr.bus, NULL, 16);
434 addr->devid = strtoul(splitaddr.devid, NULL, 16);
435 addr->function = strtoul(splitaddr.function, NULL, 10);
436 if (errno != 0)
437 goto error;
438
439 free(buf_copy); /* free the copy made with strdup */
440 return 0;
441 error:
442 free(buf_copy);
443 return -1;
444 }
445
446 /*
447 * Scan the content of the PCI bus, and the devices in the devices
448 * list
449 */
450 int
rte_pci_scan(void)451 rte_pci_scan(void)
452 {
453 struct dirent *e;
454 DIR *dir;
455 char dirname[PATH_MAX];
456 struct rte_pci_addr addr;
457
458 /* for debug purposes, PCI can be disabled */
459 if (!rte_eal_has_pci())
460 return 0;
461
462 #ifdef VFIO_PRESENT
463 if (!pci_vfio_is_enabled())
464 RTE_LOG(DEBUG, EAL, "VFIO PCI modules not loaded\n");
465 #endif
466
467 dir = opendir(rte_pci_get_sysfs_path());
468 if (dir == NULL) {
469 RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n",
470 __func__, strerror(errno));
471 return -1;
472 }
473
474 while ((e = readdir(dir)) != NULL) {
475 if (e->d_name[0] == '.')
476 continue;
477
478 if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0)
479 continue;
480
481 if (rte_pci_ignore_device(&addr))
482 continue;
483
484 snprintf(dirname, sizeof(dirname), "%s/%s",
485 rte_pci_get_sysfs_path(), e->d_name);
486
487 if (pci_scan_one(dirname, &addr) < 0)
488 goto error;
489 }
490 closedir(dir);
491 return 0;
492
493 error:
494 closedir(dir);
495 return -1;
496 }
497
498 #if defined(RTE_ARCH_X86)
499 bool
pci_device_iommu_support_va(const struct rte_pci_device * dev)500 pci_device_iommu_support_va(const struct rte_pci_device *dev)
501 {
502 #define VTD_CAP_MGAW_SHIFT 16
503 #define VTD_CAP_MGAW_MASK (0x3fULL << VTD_CAP_MGAW_SHIFT)
504 const struct rte_pci_addr *addr = &dev->addr;
505 char filename[PATH_MAX];
506 FILE *fp;
507 uint64_t mgaw, vtd_cap_reg = 0;
508
509 snprintf(filename, sizeof(filename),
510 "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap",
511 rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid,
512 addr->function);
513
514 fp = fopen(filename, "r");
515 if (fp == NULL) {
516 /* We don't have an Intel IOMMU, assume VA supported */
517 if (errno == ENOENT)
518 return true;
519
520 RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n",
521 __func__, filename, strerror(errno));
522 return false;
523 }
524
525 /* We have an Intel IOMMU */
526 if (fscanf(fp, "%" PRIx64, &vtd_cap_reg) != 1) {
527 RTE_LOG(ERR, EAL, "%s(): can't read %s\n", __func__, filename);
528 fclose(fp);
529 return false;
530 }
531
532 fclose(fp);
533
534 mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;
535
536 /*
537 * Assuming there is no limitation by now. We can not know at this point
538 * because the memory has not been initialized yet. Setting the dma mask
539 * will force a check once memory initialization is done. We can not do
540 * a fallback to IOVA PA now, but if the dma check fails, the error
541 * message should advice for using '--iova-mode pa' if IOVA VA is the
542 * current mode.
543 */
544 rte_mem_set_dma_mask(mgaw);
545 return true;
546 }
547 #elif defined(RTE_ARCH_PPC_64)
548 bool
pci_device_iommu_support_va(__rte_unused const struct rte_pci_device * dev)549 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev)
550 {
551 /*
552 * IOMMU is always present on a PowerNV host (IOMMUv2).
553 * IOMMU is also present in a KVM/QEMU VM (IOMMUv1) but is not
554 * currently supported by DPDK. Test for our current environment
555 * and report VA support as appropriate.
556 */
557
558 char *line = NULL;
559 size_t len = 0;
560 char filename[PATH_MAX] = "/proc/cpuinfo";
561 FILE *fp = fopen(filename, "r");
562 bool ret = false;
563
564 if (fp == NULL) {
565 RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n",
566 __func__, filename, strerror(errno));
567 return ret;
568 }
569
570 /* Check for a PowerNV platform */
571 while (getline(&line, &len, fp) != -1) {
572 if (strstr(line, "platform") != NULL)
573 continue;
574
575 if (strstr(line, "PowerNV") != NULL) {
576 RTE_LOG(DEBUG, EAL, "Running on a PowerNV system\n");
577 ret = true;
578 break;
579 }
580 }
581
582 free(line);
583 fclose(fp);
584 return ret;
585 }
586 #else
587 bool
pci_device_iommu_support_va(__rte_unused const struct rte_pci_device * dev)588 pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev)
589 {
590 return true;
591 }
592 #endif
593
594 enum rte_iova_mode
pci_device_iova_mode(const struct rte_pci_driver * pdrv,const struct rte_pci_device * pdev)595 pci_device_iova_mode(const struct rte_pci_driver *pdrv,
596 const struct rte_pci_device *pdev)
597 {
598 enum rte_iova_mode iova_mode = RTE_IOVA_DC;
599
600 switch (pdev->kdrv) {
601 case RTE_PCI_KDRV_VFIO: {
602 #ifdef VFIO_PRESENT
603 static int is_vfio_noiommu_enabled = -1;
604
605 if (is_vfio_noiommu_enabled == -1) {
606 if (rte_vfio_noiommu_is_enabled() == 1)
607 is_vfio_noiommu_enabled = 1;
608 else
609 is_vfio_noiommu_enabled = 0;
610 }
611 if (is_vfio_noiommu_enabled != 0)
612 iova_mode = RTE_IOVA_PA;
613 else if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0)
614 iova_mode = RTE_IOVA_VA;
615 #endif
616 break;
617 }
618
619 case RTE_PCI_KDRV_IGB_UIO:
620 case RTE_PCI_KDRV_UIO_GENERIC:
621 iova_mode = RTE_IOVA_PA;
622 break;
623
624 default:
625 if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0)
626 iova_mode = RTE_IOVA_VA;
627 break;
628 }
629 return iova_mode;
630 }
631
632 /* Read PCI config space. */
rte_pci_read_config(const struct rte_pci_device * device,void * buf,size_t len,off_t offset)633 int rte_pci_read_config(const struct rte_pci_device *device,
634 void *buf, size_t len, off_t offset)
635 {
636 char devname[RTE_DEV_NAME_MAX_LEN] = "";
637 const struct rte_intr_handle *intr_handle = &device->intr_handle;
638
639 switch (device->kdrv) {
640 case RTE_PCI_KDRV_IGB_UIO:
641 case RTE_PCI_KDRV_UIO_GENERIC:
642 return pci_uio_read_config(intr_handle, buf, len, offset);
643 #ifdef VFIO_PRESENT
644 case RTE_PCI_KDRV_VFIO:
645 return pci_vfio_read_config(intr_handle, buf, len, offset);
646 #endif
647 default:
648 rte_pci_device_name(&device->addr, devname,
649 RTE_DEV_NAME_MAX_LEN);
650 RTE_LOG(ERR, EAL,
651 "Unknown driver type for %s\n", devname);
652 return -1;
653 }
654 }
655
656 /* Write PCI config space. */
rte_pci_write_config(const struct rte_pci_device * device,const void * buf,size_t len,off_t offset)657 int rte_pci_write_config(const struct rte_pci_device *device,
658 const void *buf, size_t len, off_t offset)
659 {
660 char devname[RTE_DEV_NAME_MAX_LEN] = "";
661 const struct rte_intr_handle *intr_handle = &device->intr_handle;
662
663 switch (device->kdrv) {
664 case RTE_PCI_KDRV_IGB_UIO:
665 case RTE_PCI_KDRV_UIO_GENERIC:
666 return pci_uio_write_config(intr_handle, buf, len, offset);
667 #ifdef VFIO_PRESENT
668 case RTE_PCI_KDRV_VFIO:
669 return pci_vfio_write_config(intr_handle, buf, len, offset);
670 #endif
671 default:
672 rte_pci_device_name(&device->addr, devname,
673 RTE_DEV_NAME_MAX_LEN);
674 RTE_LOG(ERR, EAL,
675 "Unknown driver type for %s\n", devname);
676 return -1;
677 }
678 }
679
680 #if defined(RTE_ARCH_X86)
681 static int
pci_ioport_map(struct rte_pci_device * dev,int bar __rte_unused,struct rte_pci_ioport * p)682 pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused,
683 struct rte_pci_ioport *p)
684 {
685 uint16_t start, end;
686 FILE *fp;
687 char *line = NULL;
688 char pci_id[16];
689 int found = 0;
690 size_t linesz;
691
692 if (rte_eal_iopl_init() != 0) {
693 RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for PCI device %s\n",
694 __func__, dev->name);
695 return -1;
696 }
697
698 snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
699 dev->addr.domain, dev->addr.bus,
700 dev->addr.devid, dev->addr.function);
701
702 fp = fopen("/proc/ioports", "r");
703 if (fp == NULL) {
704 RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__);
705 return -1;
706 }
707
708 while (getdelim(&line, &linesz, '\n', fp) > 0) {
709 char *ptr = line;
710 char *left;
711 int n;
712
713 n = strcspn(ptr, ":");
714 ptr[n] = 0;
715 left = &ptr[n + 1];
716
717 while (*left && isspace(*left))
718 left++;
719
720 if (!strncmp(left, pci_id, strlen(pci_id))) {
721 found = 1;
722
723 while (*ptr && isspace(*ptr))
724 ptr++;
725
726 sscanf(ptr, "%04hx-%04hx", &start, &end);
727
728 break;
729 }
730 }
731
732 free(line);
733 fclose(fp);
734
735 if (!found)
736 return -1;
737
738 p->base = start;
739 RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start);
740
741 return 0;
742 }
743 #endif
744
745 int
rte_pci_ioport_map(struct rte_pci_device * dev,int bar,struct rte_pci_ioport * p)746 rte_pci_ioport_map(struct rte_pci_device *dev, int bar,
747 struct rte_pci_ioport *p)
748 {
749 int ret = -1;
750
751 switch (dev->kdrv) {
752 #ifdef VFIO_PRESENT
753 case RTE_PCI_KDRV_VFIO:
754 if (pci_vfio_is_enabled())
755 ret = pci_vfio_ioport_map(dev, bar, p);
756 break;
757 #endif
758 case RTE_PCI_KDRV_IGB_UIO:
759 ret = pci_uio_ioport_map(dev, bar, p);
760 break;
761 case RTE_PCI_KDRV_UIO_GENERIC:
762 #if defined(RTE_ARCH_X86)
763 ret = pci_ioport_map(dev, bar, p);
764 #else
765 ret = pci_uio_ioport_map(dev, bar, p);
766 #endif
767 break;
768 default:
769 break;
770 }
771
772 if (!ret)
773 p->dev = dev;
774
775 return ret;
776 }
777
778 void
rte_pci_ioport_read(struct rte_pci_ioport * p,void * data,size_t len,off_t offset)779 rte_pci_ioport_read(struct rte_pci_ioport *p,
780 void *data, size_t len, off_t offset)
781 {
782 switch (p->dev->kdrv) {
783 #ifdef VFIO_PRESENT
784 case RTE_PCI_KDRV_VFIO:
785 pci_vfio_ioport_read(p, data, len, offset);
786 break;
787 #endif
788 case RTE_PCI_KDRV_IGB_UIO:
789 pci_uio_ioport_read(p, data, len, offset);
790 break;
791 case RTE_PCI_KDRV_UIO_GENERIC:
792 pci_uio_ioport_read(p, data, len, offset);
793 break;
794 default:
795 break;
796 }
797 }
798
799 void
rte_pci_ioport_write(struct rte_pci_ioport * p,const void * data,size_t len,off_t offset)800 rte_pci_ioport_write(struct rte_pci_ioport *p,
801 const void *data, size_t len, off_t offset)
802 {
803 switch (p->dev->kdrv) {
804 #ifdef VFIO_PRESENT
805 case RTE_PCI_KDRV_VFIO:
806 pci_vfio_ioport_write(p, data, len, offset);
807 break;
808 #endif
809 case RTE_PCI_KDRV_IGB_UIO:
810 pci_uio_ioport_write(p, data, len, offset);
811 break;
812 case RTE_PCI_KDRV_UIO_GENERIC:
813 pci_uio_ioport_write(p, data, len, offset);
814 break;
815 default:
816 break;
817 }
818 }
819
820 int
rte_pci_ioport_unmap(struct rte_pci_ioport * p)821 rte_pci_ioport_unmap(struct rte_pci_ioport *p)
822 {
823 int ret = -1;
824
825 switch (p->dev->kdrv) {
826 #ifdef VFIO_PRESENT
827 case RTE_PCI_KDRV_VFIO:
828 if (pci_vfio_is_enabled())
829 ret = pci_vfio_ioport_unmap(p);
830 break;
831 #endif
832 case RTE_PCI_KDRV_IGB_UIO:
833 ret = pci_uio_ioport_unmap(p);
834 break;
835 case RTE_PCI_KDRV_UIO_GENERIC:
836 #if defined(RTE_ARCH_X86)
837 ret = 0;
838 #else
839 ret = pci_uio_ioport_unmap(p);
840 #endif
841 break;
842 default:
843 break;
844 }
845
846 return ret;
847 }
848