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35 * Copyright 2013-2014 6WIND S.A.
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38 * modification, are permitted provided that the following conditions
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49 * from this software without specific prior written permission.
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
69 #include <sys/queue.h>
72 #include <rte_interrupts.h>
75 #include <rte_per_lcore.h>
76 #include <rte_memory.h>
77 #include <rte_memzone.h>
79 #include <rte_string_fns.h>
80 #include <rte_common.h>
81 #include <rte_devargs.h>
83 #include "eal_private.h"
85 struct pci_driver_list pci_driver_list;
86 struct pci_device_list pci_device_list;
88 static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
90 struct rte_devargs *devargs;
92 TAILQ_FOREACH(devargs, &devargs_list, next) {
93 if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
94 devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
96 if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
102 /* map a particular resource from a file */
104 pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
105 int additional_flags)
109 /* Map the PCI memory resource of device */
110 mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
111 MAP_SHARED | additional_flags, fd, offset);
112 if (mapaddr == MAP_FAILED) {
113 RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
114 __func__, fd, requested_addr,
115 (unsigned long)size, (unsigned long)offset,
116 strerror(errno), mapaddr);
118 RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
123 /* unmap a particular resource */
125 pci_unmap_resource(void *requested_addr, size_t size)
127 if (requested_addr == NULL)
130 /* Unmap the PCI memory resource of device */
131 if (munmap(requested_addr, size)) {
132 RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
133 __func__, requested_addr, (unsigned long)size,
136 RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
142 pci_map_device(struct rte_pci_device *dev)
146 /* try mapping the NIC resources using VFIO if it exists */
150 if (pci_vfio_is_enabled())
151 ret = pci_vfio_map_resource(dev);
154 case RTE_KDRV_IGB_UIO:
155 case RTE_KDRV_UIO_GENERIC:
156 case RTE_KDRV_NIC_UIO:
157 /* map resources for devices that use uio */
158 ret = pci_uio_map_resource(dev);
161 RTE_LOG(DEBUG, EAL, " Not managed by a supported kernel driver,"
170 #ifdef RTE_LIBRTE_EAL_HOTPLUG
171 /* Unmap pci device */
173 pci_unmap_device(struct rte_pci_device *dev)
178 /* try unmapping the NIC resources using VFIO if it exists */
181 RTE_LOG(ERR, EAL, "Hotplug doesn't support vfio yet\n");
183 case RTE_KDRV_IGB_UIO:
184 case RTE_KDRV_UIO_GENERIC:
185 case RTE_KDRV_NIC_UIO:
186 /* unmap resources for devices that use uio */
187 pci_uio_unmap_resource(dev);
190 RTE_LOG(DEBUG, EAL, " Not managed by a supported kernel driver,"
195 #endif /* RTE_LIBRTE_EAL_HOTPLUG */
198 * If vendor/device ID match, call the devinit() function of all
199 * registered driver for the given device. Return -1 if initialization
200 * failed, return 1 if no driver is found for this device.
203 pci_probe_all_drivers(struct rte_pci_device *dev)
205 struct rte_pci_driver *dr = NULL;
211 TAILQ_FOREACH(dr, &pci_driver_list, next) {
212 rc = rte_eal_pci_probe_one_driver(dr, dev);
214 /* negative value is an error */
217 /* positive value means driver not found */
224 #ifdef RTE_LIBRTE_EAL_HOTPLUG
226 * If vendor/device ID match, call the devuninit() function of all
227 * registered driver for the given device. Return -1 if initialization
228 * failed, return 1 if no driver is found for this device.
231 pci_close_all_drivers(struct rte_pci_device *dev)
233 struct rte_pci_driver *dr = NULL;
239 TAILQ_FOREACH(dr, &pci_driver_list, next) {
240 rc = rte_eal_pci_close_one_driver(dr, dev);
242 /* negative value is an error */
245 /* positive value means driver not found */
253 * Find the pci device specified by pci address, then invoke probe function of
254 * the driver of the devive.
257 rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
259 struct rte_pci_device *dev = NULL;
265 TAILQ_FOREACH(dev, &pci_device_list, next) {
266 if (rte_eal_compare_pci_addr(&dev->addr, addr))
269 ret = pci_probe_all_drivers(dev);
277 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
278 " cannot be used\n", dev->addr.domain, dev->addr.bus,
279 dev->addr.devid, dev->addr.function);
284 * Find the pci device specified by pci address, then invoke close function of
285 * the driver of the devive.
288 rte_eal_pci_close_one(const struct rte_pci_addr *addr)
290 struct rte_pci_device *dev = NULL;
296 TAILQ_FOREACH(dev, &pci_device_list, next) {
297 if (rte_eal_compare_pci_addr(&dev->addr, addr))
300 ret = pci_close_all_drivers(dev);
304 TAILQ_REMOVE(&pci_device_list, dev, next);
310 RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
311 " cannot be used\n", dev->addr.domain, dev->addr.bus,
312 dev->addr.devid, dev->addr.function);
315 #endif /* RTE_LIBRTE_EAL_HOTPLUG */
318 * Scan the content of the PCI bus, and call the devinit() function for
319 * all registered drivers that have a matching entry in its id_table
320 * for discovered devices.
323 rte_eal_pci_probe(void)
325 struct rte_pci_device *dev = NULL;
326 struct rte_devargs *devargs;
330 if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0)
333 TAILQ_FOREACH(dev, &pci_device_list, next) {
335 /* set devargs in PCI structure */
336 devargs = pci_devargs_lookup(dev);
338 dev->devargs = devargs;
340 /* probe all or only whitelisted devices */
342 ret = pci_probe_all_drivers(dev);
343 else if (devargs != NULL &&
344 devargs->type == RTE_DEVTYPE_WHITELISTED_PCI)
345 ret = pci_probe_all_drivers(dev);
347 rte_exit(EXIT_FAILURE, "Requested device " PCI_PRI_FMT
348 " cannot be used\n", dev->addr.domain, dev->addr.bus,
349 dev->addr.devid, dev->addr.function);
355 /* dump one device */
357 pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
361 fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
362 dev->addr.devid, dev->addr.function);
363 fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
366 for (i = 0; i != sizeof(dev->mem_resource) /
367 sizeof(dev->mem_resource[0]); i++) {
368 fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
369 dev->mem_resource[i].phys_addr,
370 dev->mem_resource[i].len);
375 /* dump devices on the bus */
377 rte_eal_pci_dump(FILE *f)
379 struct rte_pci_device *dev = NULL;
381 TAILQ_FOREACH(dev, &pci_device_list, next) {
382 pci_dump_one_device(f, dev);
386 /* register a driver */
388 rte_eal_pci_register(struct rte_pci_driver *driver)
390 TAILQ_INSERT_TAIL(&pci_driver_list, driver, next);
393 /* unregister a driver */
395 rte_eal_pci_unregister(struct rte_pci_driver *driver)
397 TAILQ_REMOVE(&pci_driver_list, driver, next);