From: Thomas Monjalon Date: Tue, 25 Sep 2018 20:55:27 +0000 (+0200) Subject: drivers/bus: move driver assignment to end of probing X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=391797f04208;p=dpdk.git drivers/bus: move driver assignment to end of probing The PCI mapping requires to know the PCI driver to use, even before the probing is done. That's why the PCI driver is referenced early inside the PCI device structure. See commit 1d20a073fa5e ("bus/pci: reference driver structure before mapping") However the rte_driver does not need to be referenced in rte_device before the device probing is done. By moving back this assignment at the end of the device probing, it becomes possible to make clear the status of a rte_device. Signed-off-by: Thomas Monjalon Reviewed-by: Andrew Rybchenko Tested-by: Andrew Rybchenko Reviewed-by: Rosen Xu --- diff --git a/drivers/bus/ifpga/ifpga_bus.c b/drivers/bus/ifpga/ifpga_bus.c index 80663328aa..fca2dbace8 100644 --- a/drivers/bus/ifpga/ifpga_bus.c +++ b/drivers/bus/ifpga/ifpga_bus.c @@ -280,14 +280,13 @@ ifpga_probe_one_driver(struct rte_afu_driver *drv, /* reference driver structure */ afu_dev->driver = drv; - afu_dev->device.driver = &drv->driver; /* call the driver probe() function */ ret = drv->probe(afu_dev); - if (ret) { + if (ret) afu_dev->driver = NULL; - afu_dev->device.driver = NULL; - } + else + afu_dev->device.driver = &drv->driver; return ret; } @@ -302,7 +301,7 @@ ifpga_probe_all_drivers(struct rte_afu_device *afu_dev) return -1; /* Check if a driver is already loaded */ - if (afu_dev->driver != NULL) + if (afu_dev->device.driver != NULL) return 0; TAILQ_FOREACH(drv, &ifpga_afu_drv_list, next) { diff --git a/drivers/bus/pci/pci_common.c b/drivers/bus/pci/pci_common.c index c0238d444b..eb27e79922 100644 --- a/drivers/bus/pci/pci_common.c +++ b/drivers/bus/pci/pci_common.c @@ -161,14 +161,12 @@ rte_pci_probe_one_driver(struct rte_pci_driver *dr, * driver flags for adjusting configuration. */ dev->driver = dr; - dev->device.driver = &dr->driver; 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) { dev->driver = NULL; - dev->device.driver = NULL; return ret; } } @@ -177,7 +175,6 @@ rte_pci_probe_one_driver(struct rte_pci_driver *dr, 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. @@ -185,6 +182,8 @@ rte_pci_probe_one_driver(struct rte_pci_driver *dr, !(ret > 0 && (dr->drv_flags & RTE_PCI_DRV_KEEP_MAPPED_RES))) rte_pci_unmap_device(dev); + } else { + dev->device.driver = &dr->driver; } return ret; @@ -245,7 +244,7 @@ pci_probe_all_drivers(struct rte_pci_device *dev) return -1; /* Check if a driver is already loaded */ - if (dev->driver != NULL) + if (dev->device.driver != NULL) return 0; FOREACH_DRIVER_ON_PCIBUS(dr) { diff --git a/drivers/bus/pci/rte_bus_pci.h b/drivers/bus/pci/rte_bus_pci.h index 2ed2f5053b..b9a0f30d29 100644 --- a/drivers/bus/pci/rte_bus_pci.h +++ b/drivers/bus/pci/rte_bus_pci.h @@ -62,7 +62,7 @@ struct rte_pci_device { struct rte_mem_resource mem_resource[PCI_MAX_RESOURCE]; /**< PCI Memory Resource */ struct rte_intr_handle intr_handle; /**< Interrupt handle */ - struct rte_pci_driver *driver; /**< Associated driver */ + struct rte_pci_driver *driver; /**< PCI driver used in probing */ uint16_t max_vfs; /**< sriov enable if not zero */ enum rte_kernel_driver kdrv; /**< Kernel driver passthrough */ char name[PCI_PRI_STR_SIZE+1]; /**< PCI location (ASCII) */ diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c index 0142fb2c83..3f27f35107 100644 --- a/drivers/bus/vdev/vdev.c +++ b/drivers/bus/vdev/vdev.c @@ -150,10 +150,9 @@ vdev_probe_all_drivers(struct rte_vdev_device *dev) if (vdev_parse(name, &driver)) return -1; - dev->device.driver = &driver->driver; ret = driver->probe(dev); - if (ret) - dev->device.driver = NULL; + if (ret == 0) + dev->device.driver = &driver->driver; return ret; } diff --git a/drivers/bus/vmbus/vmbus_common.c b/drivers/bus/vmbus/vmbus_common.c index e3ceb6906a..de5548aa40 100644 --- a/drivers/bus/vmbus/vmbus_common.c +++ b/drivers/bus/vmbus/vmbus_common.c @@ -111,7 +111,6 @@ vmbus_probe_one_driver(struct rte_vmbus_driver *dr, /* reference driver structure */ dev->driver = dr; - dev->device.driver = &dr->driver; if (dev->device.numa_node < 0) { VMBUS_LOG(WARNING, " Invalid NUMA socket, default to 0"); @@ -124,6 +123,8 @@ vmbus_probe_one_driver(struct rte_vmbus_driver *dr, if (ret) { dev->driver = NULL; rte_vmbus_unmap_device(dev); + } else { + dev->device.driver = &dr->driver; } return ret; @@ -142,7 +143,7 @@ vmbus_probe_all_drivers(struct rte_vmbus_device *dev) int rc; /* Check if a driver is already loaded */ - if (dev->driver != NULL) { + if (dev->device.driver != NULL) { VMBUS_LOG(DEBUG, "VMBUS driver already loaded"); return 0; } diff --git a/drivers/net/i40e/i40e_vf_representor.c b/drivers/net/i40e/i40e_vf_representor.c index 0bfbb4f601..24751d13cd 100644 --- a/drivers/net/i40e/i40e_vf_representor.c +++ b/drivers/net/i40e/i40e_vf_representor.c @@ -487,9 +487,6 @@ i40e_vf_representor_init(struct rte_eth_dev *ethdev, void *init_params) if (representor->vf_id >= pf->vf_num) return -ENODEV; - /** representor shares the same driver as it's PF device */ - ethdev->device->driver = representor->adapter->eth_dev->device->driver; - /* Set representor device ops */ ethdev->dev_ops = &i40e_representor_dev_ops; diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c index defc0d4b0d..3de7bc53e5 100644 --- a/drivers/net/mlx4/mlx4.c +++ b/drivers/net/mlx4/mlx4.c @@ -734,7 +734,6 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) eth_dev->data->mac_addrs = priv->mac; eth_dev->device = &pci_dev->device; rte_eth_copy_pci_info(eth_dev, pci_dev); - eth_dev->device->driver = &mlx4_driver.driver; /* Initialize local interrupt handle for current port. */ priv->intr_handle = (struct rte_intr_handle){ .fd = -1, diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index 795a219771..8cbfee1bac 100644 --- a/drivers/net/mlx5/mlx5.c +++ b/drivers/net/mlx5/mlx5.c @@ -1090,7 +1090,6 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev, priv->dev_data = eth_dev->data; eth_dev->data->mac_addrs = priv->mac; eth_dev->device = dpdk_dev; - eth_dev->device->driver = &mlx5_driver.driver; err = mlx5_uar_init_primary(eth_dev); if (err) { err = rte_errno; diff --git a/drivers/net/szedata2/rte_eth_szedata2.c b/drivers/net/szedata2/rte_eth_szedata2.c index 8f92e72f22..4e5e01cf19 100644 --- a/drivers/net/szedata2/rte_eth_szedata2.c +++ b/drivers/net/szedata2/rte_eth_szedata2.c @@ -1474,7 +1474,7 @@ rte_szedata2_eth_dev_init(struct rte_eth_dev *dev, struct port_info *pi) PMD_INIT_FUNC_TRACE(); PMD_INIT_LOG(INFO, "Initializing eth_dev %s (driver %s)", data->name, - dev->device->driver->name); + RTE_STR(RTE_SZEDATA2_DRIVER_NAME)); /* Fill internal private structure. */ internals->dev = dev; @@ -1525,7 +1525,7 @@ rte_szedata2_eth_dev_init(struct rte_eth_dev *dev, struct port_info *pi) ether_addr_copy(ð_addr, data->mac_addrs); PMD_INIT_LOG(INFO, "%s device %s successfully initialized", - dev->device->driver->name, data->name); + RTE_STR(RTE_SZEDATA2_DRIVER_NAME), data->name); return 0; } @@ -1547,7 +1547,7 @@ rte_szedata2_eth_dev_uninit(struct rte_eth_dev *dev) rte_free(dev->data->mac_addrs); PMD_DRV_LOG(INFO, "%s device %s successfully uninitialized", - dev->device->driver->name, dev->data->name); + RTE_STR(RTE_SZEDATA2_DRIVER_NAME), dev->data->name); return 0; } diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h index b174bf4a10..efdd4a2e26 100644 --- a/lib/librte_eal/common/include/rte_dev.h +++ b/lib/librte_eal/common/include/rte_dev.h @@ -156,7 +156,7 @@ struct rte_driver { struct rte_device { TAILQ_ENTRY(rte_device) next; /**< Next device */ const char *name; /**< Device name */ - const struct rte_driver *driver;/**< Associated driver */ + const struct rte_driver *driver; /**< Driver assigned after probing */ const struct rte_bus *bus; /**< Bus handle assigned on scan */ int numa_node; /**< NUMA node connection */ struct rte_devargs *devargs; /**< Device user arguments */