diff options
author | 2017-05-16 14:51:32 +0200 | |
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committer | 2017-05-16 14:51:32 +0200 | |
commit | fca143f059a0bddd7d47b8dc2df646a891b0eb0f (patch) | |
tree | 4bfeadc905c977e45e54a90c42330553b8942e4e /lib/librte_eal/common/eal_common_pci.c | |
parent | ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6 (diff) |
Imported Upstream version 17.05
Diffstat (limited to 'lib/librte_eal/common/eal_common_pci.c')
-rw-r--r-- | lib/librte_eal/common/eal_common_pci.c | 301 |
1 files changed, 166 insertions, 135 deletions
diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c index 6bff6752..b7499913 100644 --- a/lib/librte_eal/common/eal_common_pci.c +++ b/lib/librte_eal/common/eal_common_pci.c @@ -69,8 +69,10 @@ #include <sys/queue.h> #include <sys/mman.h> +#include <rte_errno.h> #include <rte_interrupts.h> #include <rte_log.h> +#include <rte_bus.h> #include <rte_pci.h> #include <rte_per_lcore.h> #include <rte_memory.h> @@ -82,10 +84,7 @@ #include "eal_private.h" -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); +extern struct rte_pci_bus rte_pci_bus; #define SYSFS_PCI_DEVICES "/sys/bus/pci/devices" @@ -153,170 +152,154 @@ pci_unmap_resource(void *requested_addr, size_t size) } /* - * If vendor/device ID match, call the probe() 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 != dev->id.class_id && + 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(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 1; } - /* return positive value if driver doesn't support this device */ - return 1; + + return 0; } /* - * If vendor/device ID match, call the remove() function of the + * If vendor/device ID match, call the probe() function of the * driver. */ static int -rte_eal_pci_detach_dev(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 */ + RTE_LOG(DEBUG, EAL, "Driver (%s) doesn't match the device\n", + dr->driver.name); + 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); + + /* 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(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(INFO, EAL, " probe driver: %x:%x %s\n", dev->id.vendor_id, + dev->id.device_id, dr->driver.name); - RTE_LOG(DEBUG, EAL, " remove 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_pci_map_device(dev); + if (ret != 0) + return ret; + } - if (dr->remove && (dr->remove(dev) < 0)) - return -1; /* negative value is an error */ + /* reference driver structure */ + dev->driver = dr; + dev->device.driver = &dr->driver; - /* clear driver structure */ + /* call the driver probe() function */ + ret = dr->probe(dr, dev); + if (ret) { 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; + rte_pci_unmap_device(dev); } - /* return positive value if driver doesn't support this device */ - return 1; + return ret; } /* - * 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. + * 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; - /* Check if a driver is already loaded */ - if (dev->driver != NULL) - return 0; + dr = dev->driver; + loc = &dev->addr; - 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 doesn't support it */ - continue; - return 0; - } - return 1; + 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 remove() 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_detach_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; @@ -324,8 +307,12 @@ pci_detach_all_drivers(struct rte_pci_device *dev) if (dev == NULL) return -1; - TAILQ_FOREACH(dr, &pci_driver_list, next) { - rc = rte_eal_pci_detach_dev(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; @@ -342,9 +329,10 @@ pci_detach_all_drivers(struct rte_pci_device *dev) * the driver of the devive. */ 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) @@ -356,7 +344,7 @@ rte_eal_pci_probe_one(const struct rte_pci_addr *addr) if (pci_update_device(addr) < 0) goto err_return; - TAILQ_FOREACH(dev, &pci_device_list, next) { + FOREACH_DEVICE_ON_PCIBUS(dev) { if (rte_eal_compare_pci_addr(&dev->addr, addr)) continue; @@ -378,7 +366,7 @@ err_return: * Detach device specified by its pci address. */ int -rte_eal_pci_detach(const struct rte_pci_addr *addr) +rte_pci_detach(const struct rte_pci_addr *addr) { struct rte_pci_device *dev = NULL; int ret = 0; @@ -386,15 +374,19 @@ rte_eal_pci_detach(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_detach_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; } @@ -413,9 +405,10 @@ err_return: * 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; @@ -423,7 +416,8 @@ rte_eal_pci_probe(void) if (rte_eal_devargs_type_count(RTE_DEVTYPE_WHITELISTED_PCI) == 0) probe_all = 1; - TAILQ_FOREACH(dev, &pci_device_list, next) { + FOREACH_DEVICE_ON_PCIBUS(dev) { + probed++; /* set devargs in PCI structure */ devargs = pci_devargs_lookup(dev); @@ -436,13 +430,17 @@ rte_eal_pci_probe(void) 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 + 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 */ @@ -467,27 +465,60 @@ 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); } } /* 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); - rte_eal_driver_register(&driver->driver); + 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(&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) { - rte_eal_driver_unregister(&driver->driver); - TAILQ_REMOVE(&pci_driver_list, driver, next); + 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); +} + +struct rte_pci_bus rte_pci_bus = { + .bus = { + .scan = rte_pci_scan, + .probe = rte_pci_probe, + }, + .device_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.device_list), + .driver_list = TAILQ_HEAD_INITIALIZER(rte_pci_bus.driver_list), +}; + +RTE_REGISTER_BUS(PCI_BUS_NAME, rte_pci_bus.bus); |