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