[dpdk-dev,v3,15/17] eal: add hotplug operations for pci and vdev
Commit Message
From: David Marchand <david.marchand@6wind.com>
hotplug which deals with resources should come from the layer that already
handles them, i.e. eal.
For both attach and detach operations, 'name' is used to select the bus
that will handle the request.
Signed-off-by: David Marchand <david.marchand@6wind.com>
---
lib/librte_eal/bsdapp/eal/rte_eal_version.map | 2 ++
lib/librte_eal/common/eal_common_dev.c | 39 +++++++++++++++++++++++++
lib/librte_eal/common/include/rte_dev.h | 25 ++++++++++++++++
lib/librte_eal/linuxapp/eal/rte_eal_version.map | 2 ++
4 files changed, 68 insertions(+)
@@ -156,5 +156,7 @@ DPDK_16.07 {
global:
pci_get_sysfs_path;
+ rte_eal_dev_attach;
+ rte_eal_dev_detach;
} DPDK_16.04;
@@ -150,3 +150,42 @@ rte_eal_vdev_uninit(const char *name)
RTE_LOG(ERR, EAL, "no driver found for %s\n", name);
return -EINVAL;
}
+
+int rte_eal_dev_attach(const char *name, const char *devargs)
+{
+ struct rte_pci_addr addr;
+ int ret = -1;
+
+ if (eal_parse_pci_DomBDF(name, &addr) == 0) {
+ if (rte_eal_pci_probe_one(&addr) < 0)
+ goto err;
+
+ } else {
+ if (rte_eal_vdev_init(name, devargs))
+ goto err;
+ }
+
+ return 0;
+
+err:
+ RTE_LOG(ERR, EAL, "Driver, cannot attach the device\n");
+ return ret;
+}
+
+int rte_eal_dev_detach(const char *name)
+{
+ struct rte_pci_addr addr;
+
+ if (eal_parse_pci_DomBDF(name, &addr) == 0) {
+ if (rte_eal_pci_detach(&addr) < 0)
+ goto err;
+ } else {
+ if (rte_eal_vdev_uninit(name))
+ goto err;
+ }
+ return 0;
+
+err:
+ RTE_LOG(ERR, EAL, "Driver, cannot detach the device\n");
+ return -1;
+}
@@ -178,6 +178,31 @@ int rte_eal_vdev_init(const char *name, const char *args);
*/
int rte_eal_vdev_uninit(const char *name);
+/**
+ * Attach a resource to a registered driver.
+ *
+ * @param name
+ * The resource name, that refers to a pci resource or some private
+ * way of designating a resource for vdev drivers. Based on this
+ * resource name, eal will identify a driver capable of handling
+ * this resource and pass this resource to the driver probing
+ * function.
+ * @param devargs
+ * Device arguments to be passed to the driver.
+ * @return
+ * 0 on success, negative on error.
+ */
+int rte_eal_dev_attach(const char *name, const char *devargs);
+
+/**
+ * Detach a resource from its driver.
+ *
+ * @param name
+ * Same description as for rte_eal_dev_attach().
+ * Here, eal will call the driver detaching function.
+ */
+int rte_eal_dev_detach(const char *name);
+
#define PMD_REGISTER_DRIVER(d)\
RTE_INIT(devinitfn_ ##d);\
static void devinitfn_ ##d(void)\
@@ -159,5 +159,7 @@ DPDK_16.07 {
global:
pci_get_sysfs_path;
+ rte_eal_dev_attach;
+ rte_eal_dev_detach;
} DPDK_16.04;