From: David Marchand Date: Tue, 20 Sep 2016 12:41:25 +0000 (+0530) Subject: ethdev: convert to EAL hotplug X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=b0fb26685570acb9f1ff76a9f25f3e29d09e17b2;p=dpdk.git ethdev: convert to EAL hotplug Remove bus logic from ethdev hotplug by using eal for this. Current api is preserved: - the last port that has been created is tracked to return it to the application when attaching, - the internal device name is reused when detaching. We can not get rid of ethdev hotplug yet since we still need some mechanism to inform applications of port creation/removal to substitute for ethdev hotplug api. dev_type field in struct rte_eth_dev and rte_eth_dev_allocate are kept as is, but this information is not needed anymore and is removed in the following commit. Signed-off-by: David Marchand Signed-off-by: Shreyansh Jain --- diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c index 11329cf101..4f549520e1 100644 --- a/lib/librte_ether/rte_ethdev.c +++ b/lib/librte_ether/rte_ethdev.c @@ -71,6 +71,7 @@ static const char *MZ_RTE_ETH_DEV_DATA = "rte_eth_dev_data"; struct rte_eth_dev rte_eth_devices[RTE_MAX_ETHPORTS]; static struct rte_eth_dev_data *rte_eth_dev_data; +static uint8_t eth_dev_last_created_port; static uint8_t nb_ports; /* spinlock for eth device callbacks */ @@ -215,6 +216,7 @@ rte_eth_dev_allocate(const char *name, enum rte_eth_dev_type type) eth_dev->data->port_id = port_id; eth_dev->attached = DEV_ATTACHED; eth_dev->dev_type = type; + eth_dev_last_created_port = port_id; nb_ports++; return eth_dev; } @@ -346,27 +348,6 @@ rte_eth_dev_count(void) return nb_ports; } -static enum rte_eth_dev_type -rte_eth_dev_get_device_type(uint8_t port_id) -{ - RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, RTE_ETH_DEV_UNKNOWN); - return rte_eth_devices[port_id].dev_type; -} - -static int -rte_eth_dev_get_addr_by_port(uint8_t port_id, struct rte_pci_addr *addr) -{ - RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL); - - if (addr == NULL) { - RTE_PMD_DEBUG_TRACE("Null pointer is specified\n"); - return -EINVAL; - } - - *addr = rte_eth_devices[port_id].pci_dev->addr; - return 0; -} - int rte_eth_dev_get_name_by_port(uint8_t port_id, char *name) { @@ -411,34 +392,6 @@ rte_eth_dev_get_port_by_name(const char *name, uint8_t *port_id) return -ENODEV; } -static int -rte_eth_dev_get_port_by_addr(const struct rte_pci_addr *addr, uint8_t *port_id) -{ - int i; - struct rte_pci_device *pci_dev = NULL; - - if (addr == NULL) { - RTE_PMD_DEBUG_TRACE("Null pointer is specified\n"); - return -EINVAL; - } - - *port_id = RTE_MAX_ETHPORTS; - - for (i = 0; i < RTE_MAX_ETHPORTS; i++) { - - pci_dev = rte_eth_devices[i].pci_dev; - - if (pci_dev && - !rte_eal_compare_pci_addr(&pci_dev->addr, addr)) { - - *port_id = i; - - return 0; - } - } - return -ENODEV; -} - static int rte_eth_dev_is_detachable(uint8_t port_id) { @@ -464,124 +417,49 @@ rte_eth_dev_is_detachable(uint8_t port_id) return 1; } -/* attach the new physical device, then store port_id of the device */ -static int -rte_eth_dev_attach_pdev(struct rte_pci_addr *addr, uint8_t *port_id) +/* attach the new device, then store port_id of the device */ +int +rte_eth_dev_attach(const char *devargs, uint8_t *port_id) { - /* Invoke probe func of the driver can handle the new device. */ - if (rte_eal_pci_probe_one(addr)) - goto err; + int ret = -1; + int current = eth_dev_last_created_port; + char *name = NULL; + char *args = NULL; - if (rte_eth_dev_get_port_by_addr(addr, port_id)) + if ((devargs == NULL) || (port_id == NULL)) { + ret = -EINVAL; goto err; + } - return 0; -err: - return -1; -} - -/* detach the new physical device, then store pci_addr of the device */ -static int -rte_eth_dev_detach_pdev(uint8_t port_id, struct rte_pci_addr *addr) -{ - struct rte_pci_addr freed_addr; - struct rte_pci_addr vp; - - /* get pci address by port id */ - if (rte_eth_dev_get_addr_by_port(port_id, &freed_addr)) + /* parse devargs, then retrieve device name and args */ + if (rte_eal_parse_devargs_str(devargs, &name, &args)) goto err; - /* Zeroed pci addr means the port comes from virtual device */ - vp.domain = vp.bus = vp.devid = vp.function = 0; - if (rte_eal_compare_pci_addr(&vp, &freed_addr) == 0) + ret = rte_eal_dev_attach(name, args); + if (ret < 0) goto err; - /* invoke remove func of the pci driver, - * also remove the device from pci_device_list */ - if (rte_eal_pci_detach(&freed_addr)) + /* no point looking at eth_dev_last_created_port if no port exists */ + if (!nb_ports) { + RTE_LOG(ERR, EAL, "No ports found for device (%s)\n", name); + ret = -1; goto err; + } - *addr = freed_addr; - return 0; -err: - return -1; -} - -/* attach the new virtual device, then store port_id of the device */ -static int -rte_eth_dev_attach_vdev(const char *vdevargs, uint8_t *port_id) -{ - char *name = NULL, *args = NULL; - int ret = -1; - - /* parse vdevargs, then retrieve device name and args */ - if (rte_eal_parse_devargs_str(vdevargs, &name, &args)) - goto end; - - /* walk around dev_driver_list to find the driver of the device, - * then invoke probe function of the driver. - * rte_eal_vdev_init() updates port_id allocated after - * initialization. + /* if nothing happened, there is a bug here, since some driver told us + * it did attach a device, but did not create a port. */ - if (rte_eal_vdev_init(name, args)) - goto end; - - if (rte_eth_dev_get_port_by_name(name, port_id)) - goto end; - - ret = 0; -end: - free(name); - free(args); - - return ret; -} - -/* detach the new virtual device, then store the name of the device */ -static int -rte_eth_dev_detach_vdev(uint8_t port_id, char *vdevname) -{ - char name[RTE_ETH_NAME_MAX_LEN]; - - /* get device name by port id */ - if (rte_eth_dev_get_name_by_port(port_id, name)) - goto err; - /* walk around dev_driver_list to find the driver of the device, - * then invoke uninit function of the driver */ - if (rte_eal_vdev_uninit(name)) - goto err; - - strncpy(vdevname, name, sizeof(name)); - return 0; -err: - return -1; -} - -/* attach the new device, then store port_id of the device */ -int -rte_eth_dev_attach(const char *devargs, uint8_t *port_id) -{ - struct rte_pci_addr addr; - int ret = -1; - - if ((devargs == NULL) || (port_id == NULL)) { - ret = -EINVAL; + if (current == eth_dev_last_created_port) { + ret = -1; goto err; } - if (eal_parse_pci_DomBDF(devargs, &addr) == 0) { - ret = rte_eth_dev_attach_pdev(&addr, port_id); - if (ret < 0) - goto err; - } else { - ret = rte_eth_dev_attach_vdev(devargs, port_id); - if (ret < 0) - goto err; - } + *port_id = eth_dev_last_created_port; + ret = 0; - return 0; err: - RTE_LOG(ERR, EAL, "Driver, cannot attach the device\n"); + free(name); + free(args); return ret; } @@ -589,7 +467,6 @@ err: int rte_eth_dev_detach(uint8_t port_id, char *name) { - struct rte_pci_addr addr; int ret = -1; if (name == NULL) { @@ -597,33 +474,19 @@ rte_eth_dev_detach(uint8_t port_id, char *name) goto err; } - /* check whether the driver supports detach feature, or not */ + /* FIXME: move this to eal, once device flags are relocated there */ if (rte_eth_dev_is_detachable(port_id)) goto err; - if (rte_eth_dev_get_device_type(port_id) == RTE_ETH_DEV_PCI) { - ret = rte_eth_dev_get_addr_by_port(port_id, &addr); - if (ret < 0) - goto err; - - ret = rte_eth_dev_detach_pdev(port_id, &addr); - if (ret < 0) - goto err; - - snprintf(name, RTE_ETH_NAME_MAX_LEN, - "%04x:%02x:%02x.%d", - addr.domain, addr.bus, - addr.devid, addr.function); - } else { - ret = rte_eth_dev_detach_vdev(port_id, name); - if (ret < 0) - goto err; - } + snprintf(name, sizeof(rte_eth_devices[port_id].data->name), + "%s", rte_eth_devices[port_id].data->name); + ret = rte_eal_dev_detach(name); + if (ret < 0) + goto err; return 0; err: - RTE_LOG(ERR, EAL, "Driver, cannot detach the device\n"); return ret; }