fsl_qbman: Framework for enabling Link status notification
- This will enable link update event notification for
user space USDPAA application.
Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>
DPDK-2128
(cherry picked from commit fb53c813a779cc3fc28c8ed3fc8bc0dde24db0ea)
(cherry picked from commit 13efcd6d3c)
This commit is contained in:
Sachin Saxena
Jason Liu
parent
40693b4108
commit
7dcadb8d92
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@ -1,5 +1,9 @@
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subdir-ccflags-y := -Werror
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# Include netcomm SW specific definitions
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include $(srctree)/drivers/net/ethernet/freescale/sdk_fman/ncsw_config.mk
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ccflags-y += -I$(NET_DPA)
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# Common
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obj-$(CONFIG_FSL_SDK_DPA) += dpa_alloc.o
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obj-$(CONFIG_FSL_SDK_DPA) += qbman_driver.o
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@ -18,6 +18,8 @@
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#include <linux/slab.h>
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#include <linux/mman.h>
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#include <linux/of_reserved_mem.h>
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#include <linux/eventfd.h>
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#include <linux/fdtable.h>
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#if !(defined(CONFIG_ARM) || defined(CONFIG_ARM64))
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#include <mm/mmu_decl.h>
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@ -27,6 +29,26 @@
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#include <linux/fsl_usdpaa.h>
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#include "bman_low.h"
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#include "qman_low.h"
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/* Headers requires for
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* Link status support
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*/
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#include <linux/device.h>
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#include <linux/of_mdio.h>
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#include "mac.h"
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#include "dpaa_eth_common.h"
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/* Private data for Proxy Interface */
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struct dpa_proxy_priv_s {
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struct mac_device *mac_dev;
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struct eventfd_ctx *efd_ctx;
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};
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/* Interface Helpers */
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static inline struct device *get_dev_ptr(char *if_name);
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static void phy_link_updates(struct net_device *net_dev);
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/* IOCTL handlers */
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static inline int ioctl_usdpaa_get_link_status(char *if_name);
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static int ioctl_en_if_link_status(struct usdpaa_ioctl_link_status *args);
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static int ioctl_disable_if_link_status(char *if_name);
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/* Physical address range of the memory reservation, exported for mm/mem.c */
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static u64 phys_start;
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@ -556,7 +578,6 @@ static bool check_portal_channel(void *ctx, u32 channel)
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static int usdpaa_release(struct inode *inode, struct file *filp)
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{
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int err = 0;
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@ -1656,6 +1677,220 @@ found:
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return 0;
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}
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static inline struct device *get_dev_ptr(char *if_name)
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{
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struct device *dev;
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char node[NODE_NAME_LEN];
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sprintf(node, "soc:fsl,dpaa:%s",if_name);
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dev = bus_find_device_by_name(&platform_bus_type, NULL, node);
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if (dev == NULL) {
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pr_err(KBUILD_MODNAME "IF %s not found\n", if_name);
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return NULL;
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}
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pr_debug("%s: found dev 0x%lX for If %s ,dev->platform_data %p\n",
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__func__, (unsigned long)dev,
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if_name, dev->platform_data);
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return dev;
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}
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/* This function will return Current link status of the device
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* '1' if Link is UP, '0' otherwise.
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*
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* Input parameter:
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* if_name: Interface node name
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*
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*/
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static inline int ioctl_usdpaa_get_link_status(char *if_name)
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{
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struct net_device *net_dev = NULL;
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struct device *dev;
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dev = get_dev_ptr(if_name);
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if (dev == NULL)
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return -ENODEV;
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net_dev = dev->platform_data;
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if (net_dev == NULL)
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return -ENODEV;
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if (test_bit(__LINK_STATE_NOCARRIER, &net_dev->state))
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return 0; /* Link is DOWN */
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else
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return 1; /* Link is UP */
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}
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/* Link Status Callback Function
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* This function will be resgitered to PHY framework to get
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* Link update notifications and should be responsible for waking up
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* user space task when there is a link update notification.
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*/
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static void phy_link_updates(struct net_device *net_dev)
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{
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struct dpa_proxy_priv_s *priv = NULL;
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pr_debug("%s: Link '%s': Speed '%d-Mbps': Autoneg '%d': Duplex '%d'\n",
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net_dev->name,
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ioctl_usdpaa_get_link_status(net_dev->name)?"UP":"DOWN",
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net_dev->phydev->speed,
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net_dev->phydev->autoneg,
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net_dev->phydev->duplex);
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/* Wake up the user space context to notify PHY update */
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priv = netdev_priv(net_dev);
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eventfd_signal(priv->efd_ctx, 1);
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}
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/* IOCTL handler for enabling Link status request for a given interface
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* Input parameters:
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* args->if_name: This the network interface node name as defind in
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* device tree file. Currently, it has format of
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* "ethernet@x" type for each interface.
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* args->efd: The eventfd value which should be waked up when
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* there is any link update received.
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*/
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static int ioctl_en_if_link_status(struct usdpaa_ioctl_link_status *args)
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{
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struct net_device *net_dev = NULL;
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struct dpa_proxy_priv_s *priv = NULL;
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struct device *dev;
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struct mac_device *mac_dev;
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struct proxy_device *proxy_dev;
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struct task_struct *userspace_task = NULL;
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struct file *efd_file = NULL;
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dev = get_dev_ptr(args->if_name);
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if (dev == NULL)
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return -ENODEV;
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/* Utilize dev->platform_data to save netdevice
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pointer as it will not be registered */
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if (dev->platform_data) {
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pr_debug("%s: IF %s already initialized\n",
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__func__, args->if_name);
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/* This will happen when application is not able to initiate
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* cleanup in last run. We still need to save the new
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* eventfd context.
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*/
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net_dev = dev->platform_data;
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priv = netdev_priv(net_dev);
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/* Get current task context from which IOCTL was called */
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userspace_task = current;
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rcu_read_lock();
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efd_file = fcheck_files(userspace_task->files, args->efd);
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rcu_read_unlock();
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priv->efd_ctx = eventfd_ctx_fileget(efd_file);
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if (!priv->efd_ctx) {
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pr_err(KBUILD_MODNAME "get eventfd context failed\n");
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/* Free the allocated memory for net device */
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dev->platform_data = NULL;
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free_netdev(net_dev);
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return -EINVAL;
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}
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/* Since there will be NO PHY update as link is already setup,
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* wake user context once so that current PHY status can
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* be fetched.
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*/
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phy_link_updates(net_dev);
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return 0;
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}
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proxy_dev = dev_get_drvdata(dev);
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mac_dev = proxy_dev->mac_dev;
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/* Allocate an dummy net device for proxy interface */
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net_dev = alloc_etherdev(sizeof(*priv));
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if (!net_dev) {
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pr_err(KBUILD_MODNAME "alloc_etherdev failed\n");
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return -ENOMEM;
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} else {
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SET_NETDEV_DEV(net_dev, dev);
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priv = netdev_priv(net_dev);
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priv->mac_dev = mac_dev;
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/* Get current task context from which IOCTL was called */
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userspace_task = current;
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rcu_read_lock();
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efd_file = fcheck_files(userspace_task->files, args->efd);
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rcu_read_unlock();
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priv->efd_ctx = eventfd_ctx_fileget(efd_file);
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if (!priv->efd_ctx) {
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pr_err(KBUILD_MODNAME "get eventfd context failed\n");
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/* Free the allocated memory for net device */
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free_netdev(net_dev);
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return -EINVAL;
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}
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strncpy(net_dev->name, args->if_name, IF_NAME_MAX_LEN);
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dev->platform_data = net_dev;
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}
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pr_debug("%s: mac_dev %p cell_index %d\n",
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__func__, mac_dev, mac_dev->cell_index);
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mac_dev->phy_dev = of_phy_connect(net_dev, mac_dev->phy_node,
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phy_link_updates, 0, mac_dev->phy_if);
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if (unlikely(mac_dev->phy_dev == NULL) || IS_ERR(mac_dev->phy_dev)) {
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pr_err("%s: --------Error in PHY Connect\n", __func__);
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/* Free the allocated memory for net device */
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free_netdev(net_dev);
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return -ENODEV;
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}
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net_dev->phydev = mac_dev->phy_dev;
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mac_dev->start(mac_dev);
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pr_debug("%s: --- PHY connected for %s\n", __func__, args->if_name);
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return 0;
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}
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/* IOCTL handler for disabling Link status for a given interface
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* Input parameters:
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* if_name: This the network interface node name as defind in
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* device tree file. Currently, it has format of
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* "ethernet@x" type for each interface.
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*/
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static int ioctl_disable_if_link_status(char *if_name)
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{
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struct net_device *net_dev = NULL;
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struct device *dev;
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struct mac_device *mac_dev;
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struct proxy_device *proxy_dev;
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struct dpa_proxy_priv_s *priv = NULL;
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dev = get_dev_ptr(if_name);
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if (dev == NULL)
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return -ENODEV;
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/* Utilize dev->platform_data to save netdevice
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pointer as it will not be registered */
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if (!dev->platform_data) {
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pr_debug("%s: IF %s already Disabled for Link status\n",
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__func__, if_name);
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return 0;
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}
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net_dev = dev->platform_data;
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proxy_dev = dev_get_drvdata(dev);
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mac_dev = proxy_dev->mac_dev;
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mac_dev->stop(mac_dev);
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priv = netdev_priv(net_dev);
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eventfd_ctx_put(priv->efd_ctx);
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/* This will also deregister the call back */
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phy_disconnect(mac_dev->phy_dev);
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phy_resume(mac_dev->phy_dev);
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free_netdev(net_dev);
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dev->platform_data = NULL;
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pr_debug("%s: Link status Disabled for %s\n", __func__, if_name);
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return 0;
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}
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static long usdpaa_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
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{
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struct ctx *ctx = fp->private_data;
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@ -1722,6 +1957,47 @@ static long usdpaa_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
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return -EFAULT;
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return ioctl_free_raw_portal(fp, ctx, &input);
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}
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case USDPAA_IOCTL_ENABLE_LINK_STATUS_INTERRUPT:
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{
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struct usdpaa_ioctl_link_status input;
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int ret;
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if (copy_from_user(&input, a, sizeof(input)))
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return -EFAULT;
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ret = ioctl_en_if_link_status(&input);
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if (ret)
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pr_err("Error(%d) enable link interrupt:IF: %s\n",
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ret, input.if_name);
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return ret;
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}
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case USDPAA_IOCTL_DISABLE_LINK_STATUS_INTERRUPT:
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{
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char *input;
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int ret;
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if (copy_from_user(&input, a, sizeof(input)))
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return -EFAULT;
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ret = ioctl_disable_if_link_status(input);
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if (ret)
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pr_err("Error(%d) Disabling link interrupt:IF: %s\n",
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ret, input);
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return ret;
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}
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case USDPAA_IOCTL_GET_LINK_STATUS:
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{
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struct usdpaa_ioctl_link_status_args input;
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if (copy_from_user(&input, a, sizeof(input)))
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return -EFAULT;
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input.link_status = ioctl_usdpaa_get_link_status(input.if_name);
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if (input.link_status < 0)
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return input.link_status;
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if (copy_to_user(a, &input, sizeof(input)))
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return -EFAULT;
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return 0;
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}
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}
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return -EINVAL;
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}
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@ -365,6 +365,38 @@ int dpa_alloc_pop(struct dpa_alloc *alloc, u32 *result, u32 *count);
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int dpa_alloc_check(struct dpa_alloc *list, u32 id);
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#endif /* __KERNEL__ */
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/************************************
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* Link Status support for user space
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* interface
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************************************/
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#define IF_NAME_MAX_LEN 16
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#define NODE_NAME_LEN 32
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struct usdpaa_ioctl_link_status {
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/* network device node name */
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char if_name[IF_NAME_MAX_LEN];
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/* Eventfd value */
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uint32_t efd;
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};
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#define USDPAA_IOCTL_ENABLE_LINK_STATUS_INTERRUPT \
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_IOW(USDPAA_IOCTL_MAGIC, 0x0E, struct usdpaa_ioctl_link_status)
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#define USDPAA_IOCTL_DISABLE_LINK_STATUS_INTERRUPT \
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_IOW(USDPAA_IOCTL_MAGIC, 0x0F, char *)
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struct usdpaa_ioctl_link_status_args {
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/* network device node name */
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char if_name[IF_NAME_MAX_LEN];
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/* link status(UP/DOWN) */
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int link_status;
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};
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#define USDPAA_IOCTL_GET_LINK_STATUS \
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_IOWR(USDPAA_IOCTL_MAGIC, 0x10, struct usdpaa_ioctl_link_status_args)
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#ifdef __cplusplus
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}
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#endif
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