X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Feal_common_pci.c;h=52fd38cdd216ce3292f526f624f942cbb3503507;hb=891f07e54e5424264e124bebcf2e1dc4ec3e153c;hp=60e40e0e132f6403a87f05d86fd8bf5dfc75cbd5;hpb=538e7b887600abf40957b59ac3d7c2f879906488;p=dpdk.git diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c index 60e40e0e13..52fd38cdd2 100644 --- a/lib/librte_eal/common/eal_common_pci.c +++ b/lib/librte_eal/common/eal_common_pci.c @@ -2,6 +2,7 @@ * BSD LICENSE * * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * Copyright 2013-2014 6WIND S.A. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -30,36 +31,6 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* BSD LICENSE - * - * 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 - * 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 - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of 6WIND S.A. 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 - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ #include #include @@ -69,8 +40,10 @@ #include #include +#include #include #include +#include #include #include #include @@ -82,23 +55,61 @@ #include "eal_private.h" -struct pci_driver_list pci_driver_list; -struct pci_device_list pci_device_list; +extern struct rte_pci_bus rte_pci_bus; + +#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; + struct rte_pci_addr addr; + struct rte_bus *pbus; + pbus = rte_bus_find_by_name("pci"); TAILQ_FOREACH(devargs, &devargs_list, next) { - if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI && - devargs->type != RTE_DEVTYPE_WHITELISTED_PCI) + if (devargs->bus != pbus) continue; - if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr)) + devargs->bus->parse(devargs->name, &addr); + if (!rte_eal_compare_pci_addr(&dev->addr, &addr)) return devargs; } return NULL; } +void +pci_name_set(struct rte_pci_device *dev) +{ + struct rte_devargs *devargs; + + /* Each device has its internal, canonical name set. */ + rte_pci_device_name(&dev->addr, + dev->name, sizeof(dev->name)); + devargs = pci_devargs_lookup(dev); + dev->device.devargs = devargs; + /* In blacklist mode, if the device is not blacklisted, no + * rte_devargs exists for it. + */ + if (devargs != NULL) + /* If an rte_devargs exists, the generic rte_device uses the + * given name as its namea + */ + dev->device.name = dev->device.devargs->name; + else + /* Otherwise, it uses the internal, canonical form. */ + dev->device.name = dev->name; +} + /* map a particular resource from a file */ void * pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size, @@ -138,166 +149,162 @@ pci_unmap_resource(void *requested_addr, size_t size) } /* - * If vendor/device ID match, call the devinit() function of the - * driver. + * Match the PCI Driver and Device using the ID Table + * + * @param pci_drv + * PCI driver from which ID table would be extracted + * @param pci_dev + * PCI device to match against the driver + * @return + * 1 for successful match + * 0 for unsuccessful match */ static int -rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev) +rte_pci_match(const struct rte_pci_driver *pci_drv, + const struct rte_pci_device *pci_dev) { - int ret; const struct rte_pci_id *id_table; - for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) { - + for (id_table = pci_drv->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 && + if (id_table->vendor_id != pci_dev->id.vendor_id && id_table->vendor_id != PCI_ANY_ID) continue; - if (id_table->device_id != dev->id.device_id && + if (id_table->device_id != pci_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) + if (id_table->subsystem_vendor_id != + pci_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) + if (id_table->subsystem_device_id != + pci_dev->id.subsystem_device_id && + id_table->subsystem_device_id != PCI_ANY_ID) + continue; + if (id_table->class_id != pci_dev->id.class_id && + id_table->class_id != RTE_CLASS_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->numa_node); - - RTE_LOG(DEBUG, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id, - dev->id.device_id, dr->name); - - /* no initialization when blacklisted, return without error */ - if (dev->devargs != NULL && - dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) { - RTE_LOG(DEBUG, EAL, " Device is blacklisted, not initializing\n"); - return 1; - } - - if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) { -#ifdef RTE_PCI_CONFIG - /* - * Set PCIe config space for high performance. - * Return value can be ignored. - */ - pci_config_space_set(dev); -#endif - /* map resources for devices that use igb_uio */ - ret = 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 devinit() function */ - return dr->devinit(dr, dev); + return 1; } - /* return positive value if driver is not found */ - return 1; + + return 0; } /* - * If vendor/device ID match, call the devuninit() function of the + * If vendor/device ID match, call the probe() function of the * driver. */ static int -rte_eal_pci_close_one_driver(struct rte_pci_driver *dr, - struct rte_pci_device *dev) +rte_pci_probe_one_driver(struct rte_pci_driver *dr, + struct rte_pci_device *dev) { - const struct rte_pci_id *id_table; + int ret; + struct rte_pci_addr *loc; if ((dr == NULL) || (dev == NULL)) return -EINVAL; - for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) { + loc = &dev->addr; - /* 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; + /* The device is not blacklisted; Check if driver supports it */ + if (!rte_pci_match(dr, dev)) + /* Match of device and driver failed */ + return 1; - 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); - RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n", - loc->domain, loc->bus, loc->devid, - loc->function, dev->numa_node); + /* no initialization when blacklisted, return without error */ + if (dev->device.devargs != NULL && + dev->device.devargs->policy == + RTE_DEV_BLACKLISTED) { + RTE_LOG(INFO, EAL, " Device is blacklisted, not" + " initializing\n"); + return 1; + } - RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id, - dev->id.device_id, dr->name); + if (dev->device.numa_node < 0) { + RTE_LOG(WARNING, EAL, " Invalid NUMA socket, default to 0\n"); + dev->device.numa_node = 0; + } - /* call the driver devuninit() function */ - if (dr->devuninit && (dr->devuninit(dev) < 0)) - return -1; /* negative value is an error */ + RTE_LOG(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id, + dev->id.device_id, dr->driver.name); - /* clear driver structure */ - dev->driver = NULL; + if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) { + /* map resources for devices that use igb_uio */ + ret = rte_pci_map_device(dev); + if (ret != 0) + return ret; + } - if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) - /* unmap resources for devices that use igb_uio */ - pci_unmap_device(dev); + /* reference driver structure */ + dev->driver = dr; + dev->device.driver = &dr->driver; - return 0; + /* call the driver probe() function */ + ret = dr->probe(dr, dev); + if (ret) { + dev->driver = NULL; + dev->device.driver = NULL; + if ((dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) && + /* Don't unmap if device is unsupported and + * driver needs mapped resources. + */ + !(ret > 0 && + (dr->drv_flags & RTE_PCI_DRV_KEEP_MAPPED_RES))) + rte_pci_unmap_device(dev); } - /* return positive value if driver is not found */ - return 1; + return ret; } /* - * If vendor/device ID match, call the devinit() function of all - * registered driver for the given device. Return -1 if initialization - * failed, return 1 if no driver is found for this device. + * If vendor/device ID match, call the remove() function of the + * driver. */ static int -pci_probe_all_drivers(struct rte_pci_device *dev) +rte_pci_detach_dev(struct rte_pci_device *dev) { - struct rte_pci_driver *dr = NULL; - int rc = 0; + struct rte_pci_addr *loc; + struct rte_pci_driver *dr; if (dev == NULL) - return -1; + return -EINVAL; - TAILQ_FOREACH(dr, &pci_driver_list, next) { - rc = rte_eal_pci_probe_one_driver(dr, dev); - if (rc < 0) - /* negative value is an error */ - return -1; - if (rc > 0) - /* positive value means driver not found */ - continue; - return 0; - } - return 1; + dr = dev->driver; + 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_pci_unmap_device(dev); + + return 0; } /* - * If vendor/device ID match, call the devuninit() function of all + * 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_close_all_drivers(struct rte_pci_device *dev) +pci_probe_all_drivers(struct rte_pci_device *dev) { struct rte_pci_driver *dr = NULL; int rc = 0; @@ -305,13 +312,17 @@ pci_close_all_drivers(struct rte_pci_device *dev) if (dev == NULL) return -1; - TAILQ_FOREACH(dr, &pci_driver_list, next) { - rc = rte_eal_pci_close_one_driver(dr, dev); + /* Check if a driver is already loaded */ + if (dev->driver != NULL) + return 0; + + FOREACH_DRIVER_ON_PCIBUS(dr) { + rc = rte_pci_probe_one_driver(dr, dev); if (rc < 0) /* negative value is an error */ return -1; if (rc > 0) - /* positive value means driver not found */ + /* positive value means driver doesn't support it */ continue; return 0; } @@ -320,41 +331,47 @@ pci_close_all_drivers(struct rte_pci_device *dev) /* * Find the pci device specified by pci address, then invoke probe function of - * the driver of the devive. + * the driver of the device. */ int -rte_eal_pci_probe_one(const struct rte_pci_addr *addr) +rte_pci_probe_one(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) { + /* 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; + + FOREACH_DEVICE_ON_PCIBUS(dev) { if (rte_eal_compare_pci_addr(&dev->addr, addr)) continue; ret = pci_probe_all_drivers(dev); - if (ret < 0) + if (ret) goto err_return; 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); + RTE_LOG(WARNING, EAL, + "Requested device " PCI_PRI_FMT " cannot be used\n", + addr->domain, addr->bus, addr->devid, addr->function); return -1; } /* - * Find the pci device specified by pci address, then invoke close function of - * the driver of the devive. + * Detach device specified by its pci address. */ int -rte_eal_pci_close_one(const struct rte_pci_addr *addr) +rte_pci_detach(const struct rte_pci_addr *addr) { struct rte_pci_device *dev = NULL; int ret = 0; @@ -362,15 +379,20 @@ rte_eal_pci_close_one(const struct rte_pci_addr *addr) if (addr == NULL) return -1; - TAILQ_FOREACH(dev, &pci_device_list, next) { + FOREACH_DEVICE_ON_PCIBUS(dev) { if (rte_eal_compare_pci_addr(&dev->addr, addr)) continue; - ret = pci_close_all_drivers(dev); + ret = rte_pci_detach_dev(dev); if (ret < 0) + /* negative value is an error */ goto err_return; + if (ret > 0) + /* positive value means driver doesn't support it */ + continue; - TAILQ_REMOVE(&pci_device_list, dev, next); + rte_pci_remove_device(dev); + free(dev); return 0; } return -1; @@ -383,41 +405,43 @@ err_return: } /* - * Scan the content of the PCI bus, and call the devinit() function for + * 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. */ int -rte_eal_pci_probe(void) +rte_pci_probe(void) { struct rte_pci_device *dev = NULL; + size_t probed = 0, failed = 0; struct rte_devargs *devargs; int probe_all = 0; int ret = 0; - if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0) + if (rte_pci_bus.bus.conf.scan_mode != RTE_BUS_SCAN_WHITELIST) probe_all = 1; - TAILQ_FOREACH(dev, &pci_device_list, next) { - - /* set devargs in PCI structure */ - devargs = pci_devargs_lookup(dev); - if (devargs != NULL) - dev->devargs = devargs; + FOREACH_DEVICE_ON_PCIBUS(dev) { + probed++; + devargs = dev->device.devargs; /* probe all or only whitelisted devices */ if (probe_all) ret = pci_probe_all_drivers(dev); else if (devargs != NULL && - devargs->type == RTE_DEVTYPE_WHITELISTED_PCI) + devargs->policy == RTE_DEV_WHITELISTED) ret = pci_probe_all_drivers(dev); - if (ret < 0) - rte_exit(EXIT_FAILURE, "Requested device " PCI_PRI_FMT + if (ret < 0) { + RTE_LOG(ERR, EAL, "Requested device " PCI_PRI_FMT " cannot be used\n", dev->addr.domain, dev->addr.bus, dev->addr.devid, dev->addr.function); + rte_errno = errno; + failed++; + ret = 0; + } } - return 0; + return (probed && probed == failed) ? -1 : 0; } /* dump one device */ @@ -442,25 +466,115 @@ pci_dump_one_device(FILE *f, struct rte_pci_device *dev) /* dump devices on the bus */ void -rte_eal_pci_dump(FILE *f) +rte_pci_dump(FILE *f) { struct rte_pci_device *dev = NULL; - TAILQ_FOREACH(dev, &pci_device_list, next) { + FOREACH_DEVICE_ON_PCIBUS(dev) { pci_dump_one_device(f, dev); } } +static int +pci_parse(const char *name, void *addr) +{ + struct rte_pci_addr *out = addr; + struct rte_pci_addr pci_addr; + bool parse; + + parse = (eal_parse_pci_BDF(name, &pci_addr) == 0 || + eal_parse_pci_DomBDF(name, &pci_addr) == 0); + if (parse && addr != NULL) + *out = pci_addr; + return parse == false; +} + /* register a driver */ void -rte_eal_pci_register(struct rte_pci_driver *driver) +rte_pci_register(struct rte_pci_driver *driver) { - TAILQ_INSERT_TAIL(&pci_driver_list, driver, next); + TAILQ_INSERT_TAIL(&rte_pci_bus.driver_list, driver, next); + driver->bus = &rte_pci_bus; } /* unregister a driver */ void -rte_eal_pci_unregister(struct rte_pci_driver *driver) +rte_pci_unregister(struct rte_pci_driver *driver) { - TAILQ_REMOVE(&pci_driver_list, driver, next); + TAILQ_REMOVE(&rte_pci_bus.driver_list, driver, next); + driver->bus = NULL; } + +/* Add a device to PCI bus */ +void +rte_pci_add_device(struct rte_pci_device *pci_dev) +{ + TAILQ_INSERT_TAIL(&rte_pci_bus.device_list, pci_dev, next); +} + +/* Insert a device into a predefined position in PCI bus */ +void +rte_pci_insert_device(struct rte_pci_device *exist_pci_dev, + struct rte_pci_device *new_pci_dev) +{ + TAILQ_INSERT_BEFORE(exist_pci_dev, new_pci_dev, next); +} + +/* Remove a device from PCI bus */ +void +rte_pci_remove_device(struct rte_pci_device *pci_dev) +{ + TAILQ_REMOVE(&rte_pci_bus.device_list, pci_dev, next); +} + +static struct rte_device * +pci_find_device(const struct rte_device *start, rte_dev_cmp_t cmp, + const void *data) +{ + struct rte_pci_device *dev; + + FOREACH_DEVICE_ON_PCIBUS(dev) { + if (start && &dev->device == start) { + start = NULL; /* starting point found */ + continue; + } + if (cmp(&dev->device, data) == 0) + return &dev->device; + } + + return NULL; +} + +static int +pci_plug(struct rte_device *dev) +{ + return pci_probe_all_drivers(RTE_DEV_TO_PCI(dev)); +} + +static int +pci_unplug(struct rte_device *dev) +{ + struct rte_pci_device *pdev; + int ret; + + pdev = RTE_DEV_TO_PCI(dev); + ret = rte_pci_detach_dev(pdev); + rte_pci_remove_device(pdev); + free(pdev); + return ret; +} + +struct rte_pci_bus rte_pci_bus = { + .bus = { + .scan = rte_pci_scan, + .probe = rte_pci_probe, + .find_device = pci_find_device, + .plug = pci_plug, + .unplug = pci_unplug, + .parse = pci_parse, + }, + .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list), + .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list), +}; + +RTE_REGISTER_BUS(pci, rte_pci_bus.bus);