/*-
* BSD LICENSE
- *
+ *
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
- *
+ *
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
- *
+ *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*/
/* BSD LICENSE
*
- * Copyright(c) 2013 6WIND.
+ * Copyright 2013-2014 6WIND S.A.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#include <stdlib.h>
#include <stdio.h>
#include <sys/queue.h>
+#include <sys/mman.h>
#include <rte_interrupts.h>
#include <rte_log.h>
#include <rte_per_lcore.h>
#include <rte_memory.h>
#include <rte_memzone.h>
-#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_string_fns.h>
#include <rte_common.h>
#include "eal_private.h"
-struct pci_driver_list pci_driver_list;
-struct pci_device_list pci_device_list;
+struct pci_driver_list pci_driver_list =
+ TAILQ_HEAD_INITIALIZER(pci_driver_list);
+struct pci_device_list pci_device_list =
+ TAILQ_HEAD_INITIALIZER(pci_device_list);
-static int is_blacklisted(struct rte_pci_device *dev)
+#define SYSFS_PCI_DEVICES "/sys/bus/pci/devices"
+
+const char *pci_get_sysfs_path(void)
+{
+ const char *path = NULL;
+
+ path = getenv("SYSFS_PCI_DEVICES");
+ if (path == NULL)
+ return SYSFS_PCI_DEVICES;
+
+ return path;
+}
+
+static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
{
struct rte_devargs *devargs;
TAILQ_FOREACH(devargs, &devargs_list, next) {
- if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI)
+ if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
+ devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
+ continue;
+ if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
+ return devargs;
+ }
+ return NULL;
+}
+
+/* map a particular resource from a file */
+void *
+pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
+ int additional_flags)
+{
+ void *mapaddr;
+
+ /* Map the PCI memory resource of device */
+ mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
+ MAP_SHARED | additional_flags, fd, offset);
+ if (mapaddr == MAP_FAILED) {
+ RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
+ __func__, fd, requested_addr,
+ (unsigned long)size, (unsigned long)offset,
+ strerror(errno), mapaddr);
+ } else
+ RTE_LOG(DEBUG, EAL, " PCI memory mapped at %p\n", mapaddr);
+
+ return mapaddr;
+}
+
+/* unmap a particular resource */
+void
+pci_unmap_resource(void *requested_addr, size_t size)
+{
+ if (requested_addr == NULL)
+ return;
+
+ /* Unmap the PCI memory resource of device */
+ if (munmap(requested_addr, size)) {
+ RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
+ __func__, requested_addr, (unsigned long)size,
+ strerror(errno));
+ } else
+ RTE_LOG(DEBUG, EAL, " PCI memory unmapped at %p\n",
+ requested_addr);
+}
+
+/*
+ * If vendor/device ID match, call the probe() function of the
+ * driver.
+ */
+static int
+rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
+{
+ int ret;
+ const struct rte_pci_id *id_table;
+
+ for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
+
+ /* check if device's identifiers match the driver's ones */
+ if (id_table->vendor_id != dev->id.vendor_id &&
+ id_table->vendor_id != PCI_ANY_ID)
continue;
- if (!memcmp(&dev->addr, &devargs->pci.addr, sizeof(dev->addr)))
+ if (id_table->device_id != dev->id.device_id &&
+ id_table->device_id != PCI_ANY_ID)
+ continue;
+ if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
+ id_table->subsystem_vendor_id != PCI_ANY_ID)
+ continue;
+ if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
+ id_table->subsystem_device_id != PCI_ANY_ID)
+ continue;
+ if (id_table->class_id != dev->id.class_id &&
+ id_table->class_id != RTE_CLASS_ANY_ID)
+ continue;
+
+ struct rte_pci_addr *loc = &dev->addr;
+
+ RTE_LOG(INFO, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
+ loc->domain, loc->bus, loc->devid, loc->function,
+ dev->device.numa_node);
+
+ /* no initialization when blacklisted, return without error */
+ if (dev->device.devargs != NULL &&
+ dev->device.devargs->type ==
+ RTE_DEVTYPE_BLACKLISTED_PCI) {
+ RTE_LOG(INFO, EAL, " Device is blacklisted, not initializing\n");
return 1;
+ }
+
+ RTE_LOG(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id,
+ dev->id.device_id, dr->driver.name);
+
+ if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
+ /* map resources for devices that use igb_uio */
+ ret = rte_eal_pci_map_device(dev);
+ if (ret != 0)
+ return ret;
+ } else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
+ rte_eal_process_type() == RTE_PROC_PRIMARY) {
+ /* unbind current driver */
+ if (pci_unbind_kernel_driver(dev) < 0)
+ return -1;
+ }
+
+ /* reference driver structure */
+ dev->driver = dr;
+
+ /* call the driver probe() function */
+ ret = dr->probe(dr, dev);
+ if (ret)
+ dev->driver = NULL;
+
+ return ret;
}
- return 0; /* not in blacklist */
+ /* return positive value if driver doesn't support this device */
+ return 1;
}
/*
- * If vendor/device ID match, call the devinit() function of all
- * registered driver for the given device. Return -1 if no driver is
- * found for this device.
- * For drivers with the RTE_PCI_DRV_MULTIPLE flag enabled, register
- * the same device multiple times until failure to do so.
- * It is required for non-Intel NIC drivers provided by third-parties such
- * as 6WIND.
+ * If vendor/device ID match, call the remove() function of the
+ * driver.
+ */
+static int
+rte_eal_pci_detach_dev(struct rte_pci_driver *dr,
+ struct rte_pci_device *dev)
+{
+ const struct rte_pci_id *id_table;
+
+ if ((dr == NULL) || (dev == NULL))
+ return -EINVAL;
+
+ for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
+
+ /* check if device's identifiers match the driver's ones */
+ if (id_table->vendor_id != dev->id.vendor_id &&
+ id_table->vendor_id != PCI_ANY_ID)
+ continue;
+ if (id_table->device_id != dev->id.device_id &&
+ id_table->device_id != PCI_ANY_ID)
+ continue;
+ if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
+ id_table->subsystem_vendor_id != PCI_ANY_ID)
+ continue;
+ if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
+ id_table->subsystem_device_id != PCI_ANY_ID)
+ continue;
+
+ struct rte_pci_addr *loc = &dev->addr;
+
+ RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
+ loc->domain, loc->bus, loc->devid,
+ loc->function, dev->device.numa_node);
+
+ RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
+ dev->id.device_id, dr->driver.name);
+
+ if (dr->remove && (dr->remove(dev) < 0))
+ return -1; /* negative value is an error */
+
+ /* clear driver structure */
+ dev->driver = NULL;
+
+ if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
+ /* unmap resources for devices that use igb_uio */
+ rte_eal_pci_unmap_device(dev);
+
+ return 0;
+ }
+
+ /* return positive value if driver doesn't support this device */
+ return 1;
+}
+
+/*
+ * If vendor/device ID match, call the probe() function of all
+ * registered driver for the given device. Return -1 if initialization
+ * failed, return 1 if no driver is found for this device.
*/
static int
pci_probe_all_drivers(struct rte_pci_device *dev)
{
struct rte_pci_driver *dr = NULL;
- int rc;
+ int rc = 0;
+
+ if (dev == NULL)
+ return -1;
+
+ /* Check if a driver is already loaded */
+ if (dev->driver != NULL)
+ return 0;
- dev->blacklisted = !!is_blacklisted(dev);
TAILQ_FOREACH(dr, &pci_driver_list, next) {
rc = rte_eal_pci_probe_one_driver(dr, dev);
if (rc < 0)
/* negative value is an error */
- break;
+ return -1;
if (rc > 0)
- /* positive value means driver not found */
+ /* positive value means driver doesn't support it */
continue;
- /* initialize subsequent driver instances for this device */
- if ((dr->drv_flags & RTE_PCI_DRV_MULTIPLE) &&
- (!dev->blacklisted))
- while (rte_eal_pci_probe_one_driver(dr, dev) == 0)
- ;
return 0;
}
- return -1;
+ return 1;
}
/*
- * Check if a device is ok to use according to whitelist rules.
+ * If vendor/device ID match, call the remove() function of all
+ * registered driver for the given device. Return -1 if initialization
+ * failed, return 1 if no driver is found for this device.
*/
static int
-pcidev_is_whitelisted(struct rte_pci_device *dev)
+pci_detach_all_drivers(struct rte_pci_device *dev)
{
- struct rte_devargs *devargs;
+ struct rte_pci_driver *dr = NULL;
+ int rc = 0;
- TAILQ_FOREACH(devargs, &devargs_list, next) {
- if (devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
+ if (dev == NULL)
+ return -1;
+
+ TAILQ_FOREACH(dr, &pci_driver_list, next) {
+ rc = rte_eal_pci_detach_dev(dr, dev);
+ if (rc < 0)
+ /* negative value is an error */
+ return -1;
+ if (rc > 0)
+ /* positive value means driver doesn't support it */
continue;
- if (!memcmp(&dev->addr, &devargs->pci.addr, sizeof(dev->addr)))
- return 1;
+ return 0;
}
- return 0;
+ return 1;
}
/*
- * Scan the content of the PCI bus, and call the devinit() function for
+ * Find the pci device specified by pci address, then invoke probe function of
+ * the driver of the devive.
+ */
+int
+rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
+{
+ struct rte_pci_device *dev = NULL;
+ int ret = 0;
+
+ if (addr == NULL)
+ return -1;
+
+ /* update current pci device in global list, kernel bindings might have
+ * changed since last time we looked at it.
+ */
+ if (pci_update_device(addr) < 0)
+ goto err_return;
+
+ TAILQ_FOREACH(dev, &pci_device_list, next) {
+ if (rte_eal_compare_pci_addr(&dev->addr, addr))
+ continue;
+
+ ret = pci_probe_all_drivers(dev);
+ if (ret < 0)
+ goto err_return;
+ return 0;
+ }
+ return -1;
+
+err_return:
+ RTE_LOG(WARNING, EAL,
+ "Requested device " PCI_PRI_FMT " cannot be used\n",
+ addr->domain, addr->bus, addr->devid, addr->function);
+ return -1;
+}
+
+/*
+ * Detach device specified by its pci address.
+ */
+int
+rte_eal_pci_detach(const struct rte_pci_addr *addr)
+{
+ struct rte_pci_device *dev = NULL;
+ int ret = 0;
+
+ if (addr == NULL)
+ return -1;
+
+ TAILQ_FOREACH(dev, &pci_device_list, next) {
+ if (rte_eal_compare_pci_addr(&dev->addr, addr))
+ continue;
+
+ ret = pci_detach_all_drivers(dev);
+ if (ret < 0)
+ goto err_return;
+
+ TAILQ_REMOVE(&pci_device_list, dev, next);
+ free(dev);
+ return 0;
+ }
+ return -1;
+
+err_return:
+ RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
+ " cannot be used\n", dev->addr.domain, dev->addr.bus,
+ dev->addr.devid, dev->addr.function);
+ return -1;
+}
+
+/*
+ * Scan the content of the PCI bus, and call the probe() function for
* all registered drivers that have a matching entry in its id_table
* for discovered devices.
*/
rte_eal_pci_probe(void)
{
struct rte_pci_device *dev = NULL;
+ struct rte_devargs *devargs;
int probe_all = 0;
+ int ret = 0;
if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0)
probe_all = 1;
TAILQ_FOREACH(dev, &pci_device_list, next) {
+
+ /* set devargs in PCI structure */
+ devargs = pci_devargs_lookup(dev);
+ if (devargs != NULL)
+ dev->device.devargs = devargs;
+
+ /* probe all or only whitelisted devices */
if (probe_all)
- pci_probe_all_drivers(dev);
- else if (pcidev_is_whitelisted(dev) && pci_probe_all_drivers(dev) < 0)
+ ret = pci_probe_all_drivers(dev);
+ else if (devargs != NULL &&
+ devargs->type == RTE_DEVTYPE_WHITELISTED_PCI)
+ ret = pci_probe_all_drivers(dev);
+ if (ret < 0)
rte_exit(EXIT_FAILURE, "Requested device " PCI_PRI_FMT
" cannot be used\n", dev->addr.domain, dev->addr.bus,
dev->addr.devid, dev->addr.function);
/* dump one device */
static int
-pci_dump_one_device(struct rte_pci_device *dev)
+pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
{
int i;
- printf(PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
+ fprintf(f, PCI_PRI_FMT, dev->addr.domain, dev->addr.bus,
dev->addr.devid, dev->addr.function);
- printf(" - vendor:%x device:%x\n", dev->id.vendor_id,
+ fprintf(f, " - vendor:%x device:%x\n", dev->id.vendor_id,
dev->id.device_id);
for (i = 0; i != sizeof(dev->mem_resource) /
sizeof(dev->mem_resource[0]); i++) {
- printf(" %16.16"PRIx64" %16.16"PRIx64"\n",
- dev->mem_resource[i].phys_addr,
+ fprintf(f, " %16.16"PRIx64" %16.16"PRIx64"\n",
+ dev->mem_resource[i].phys_addr,
dev->mem_resource[i].len);
}
return 0;
/* dump devices on the bus */
void
-rte_eal_pci_dump(void)
+rte_eal_pci_dump(FILE *f)
{
struct rte_pci_device *dev = NULL;
TAILQ_FOREACH(dev, &pci_device_list, next) {
- pci_dump_one_device(dev);
+ pci_dump_one_device(f, dev);
}
}
rte_eal_pci_register(struct rte_pci_driver *driver)
{
TAILQ_INSERT_TAIL(&pci_driver_list, driver, next);
+ rte_eal_driver_register(&driver->driver);
}
/* unregister a driver */
void
rte_eal_pci_unregister(struct rte_pci_driver *driver)
{
+ rte_eal_driver_unregister(&driver->driver);
TAILQ_REMOVE(&pci_driver_list, driver, next);
}
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