[PATCH 1/2] ehea: dynamic add / remove port
Jan-Bernd Themann
ossthema at de.ibm.com
Thu Mar 1 04:34:02 EST 2007
This patch introduces functionality to dynamically add / remove
ehea ports via an userspace DLPAR tool. It creates a subnode for
each logical port in the sysfs.
Signed-off-by: Jan-Bernd Themann <themann at de.ibm.com>
---
diff --git a/drivers/net/ehea/ehea.h b/drivers/net/ehea/ehea.h
index 42295d6..e595d6b 100644
--- a/drivers/net/ehea/ehea.h
+++ b/drivers/net/ehea/ehea.h
@@ -39,7 +39,7 @@ #include <asm/abs_addr.h>
#include <asm/io.h>
#define DRV_NAME "ehea"
-#define DRV_VERSION "EHEA_0046"
+#define DRV_VERSION "EHEA_0048"
#define EHEA_MSG_DEFAULT (NETIF_MSG_LINK | NETIF_MSG_TIMER \
| NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
@@ -380,10 +380,11 @@ struct ehea_port_res {
};
+#define EHEA_MAX_PORTS 16
struct ehea_adapter {
u64 handle;
- u8 num_ports;
- struct ehea_port *port[16];
+ struct ibmebus_dev *ebus_dev;
+ struct ehea_port *port[EHEA_MAX_PORTS];
struct ehea_eq *neq; /* notification event queue */
struct workqueue_struct *ehea_wq;
struct tasklet_struct neq_tasklet;
@@ -406,7 +407,7 @@ struct ehea_port {
struct net_device *netdev;
struct net_device_stats stats;
struct ehea_port_res port_res[EHEA_MAX_PORT_RES];
- struct device_node *of_dev_node; /* Open Firmware Device Node */
+ struct of_device ofdev; /* Open Firmware Device */
struct ehea_mc_list *mc_list; /* Multicast MAC addresses */
struct vlan_group *vgrp;
struct ehea_eq *qp_eq;
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index 1ef3846..42edd8d 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -580,7 +580,7 @@ static struct ehea_port *ehea_get_port(s
{
int i;
- for (i = 0; i < adapter->num_ports; i++)
+ for (i = 0; i < EHEA_MAX_PORTS; i++)
if (adapter->port[i])
if (adapter->port[i]->logical_port_id == logical_port)
return adapter->port[i];
@@ -2274,8 +2274,6 @@ static void ehea_tx_watchdog(struct net_
int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
{
struct hcp_query_ehea *cb;
- struct device_node *lhea_dn = NULL;
- struct device_node *eth_dn = NULL;
u64 hret;
int ret;
@@ -2292,18 +2290,6 @@ int ehea_sense_adapter_attr(struct ehea_
goto out_herr;
}
- /* Determine the number of available logical ports
- * by counting the child nodes of the lhea OFDT entry
- */
- adapter->num_ports = 0;
- lhea_dn = of_find_node_by_name(lhea_dn, "lhea");
- do {
- eth_dn = of_get_next_child(lhea_dn, eth_dn);
- if (eth_dn)
- adapter->num_ports++;
- } while ( eth_dn );
- of_node_put(lhea_dn);
-
adapter->max_mc_mac = cb->max_mc_mac - 1;
ret = 0;
@@ -2313,79 +2299,150 @@ out:
return ret;
}
-static int ehea_setup_single_port(struct ehea_port *port,
- struct device_node *dn)
+int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
{
- int ret;
- u64 hret;
- struct net_device *dev = port->netdev;
- struct ehea_adapter *adapter = port->adapter;
struct hcp_ehea_port_cb4 *cb4;
- u32 *dn_log_port_id;
- int jumbo = 0;
-
- sema_init(&port->port_lock, 1);
- port->state = EHEA_PORT_DOWN;
- port->sig_comp_iv = sq_entries / 10;
-
- if (!dn) {
- ehea_error("bad device node: dn=%p", dn);
- ret = -EINVAL;
- goto out;
- }
-
- port->of_dev_node = dn;
-
- /* Determine logical port id */
- dn_log_port_id = (u32*)get_property(dn, "ibm,hea-port-no", NULL);
-
- if (!dn_log_port_id) {
- ehea_error("bad device node: dn_log_port_id=%p",
- dn_log_port_id);
- ret = -EINVAL;
- goto out;
- }
- port->logical_port_id = *dn_log_port_id;
-
- port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
- if (!port->mc_list) {
- ret = -ENOMEM;
- goto out;
- }
-
- INIT_LIST_HEAD(&port->mc_list->list);
+ u64 hret;
+ int ret = 0;
- ret = ehea_sense_port_attr(port);
- if (ret)
- goto out;
+ *jumbo = 0;
- /* Enable Jumbo frames */
+ /* (Try to) enable *jumbo frames */
cb4 = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!cb4) {
ehea_error("no mem for cb4");
+ ret = -ENOMEM;
+ goto out;
} else {
- hret = ehea_h_query_ehea_port(adapter->handle,
+ hret = ehea_h_query_ehea_port(port->adapter->handle,
port->logical_port_id,
H_PORT_CB4,
H_PORT_CB4_JUMBO, cb4);
-
if (hret == H_SUCCESS) {
if (cb4->jumbo_frame)
- jumbo = 1;
+ *jumbo = 1;
else {
cb4->jumbo_frame = 1;
- hret = ehea_h_modify_ehea_port(adapter->handle,
+ hret = ehea_h_modify_ehea_port(port->adapter->
+ handle,
port->
- logical_port_id,
+ logical_port_id,
H_PORT_CB4,
H_PORT_CB4_JUMBO,
cb4);
if (hret == H_SUCCESS)
- jumbo = 1;
+ *jumbo = 1;
}
- }
+ } else
+ ret = -EINVAL;
+
kfree(cb4);
}
+out:
+ return ret;
+}
+
+static ssize_t ehea_show_port_id(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
+ return sprintf(buf, "0x%X", port->logical_port_id);
+}
+
+static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
+ NULL);
+
+static void __devinit logical_port_release(struct device *dev)
+{
+ struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
+ of_node_put(port->ofdev.node);
+}
+
+static struct device *ehea_register_port(struct ehea_port *port,
+ struct device_node *dn)
+{
+ int ret;
+
+ port->ofdev.node = of_node_get(dn);
+ port->ofdev.dev.parent = &port->adapter->ebus_dev->ofdev.dev;
+
+ sprintf(port->ofdev.dev.bus_id, "port%d", port->logical_port_id);
+ port->ofdev.dev.release = logical_port_release;
+
+ ret = of_device_register(&port->ofdev);
+ if (ret) {
+ ehea_error("failed to register device. ret=%d", ret);
+ goto out;
+ }
+
+ ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
+ if (ret) {
+ ehea_error("failed to register attributes, ret=%d", ret);
+ goto out_unreg_of_dev;
+ }
+
+ return &port->ofdev.dev;
+
+out_unreg_of_dev:
+ of_device_unregister(&port->ofdev);
+out:
+ return NULL;
+}
+
+static void ehea_unregister_port(struct ehea_port *port)
+{
+ device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
+ of_device_unregister(&port->ofdev);
+}
+
+struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
+ u32 logical_port_id,
+ struct device_node *dn)
+{
+ int ret;
+ struct net_device *dev;
+ struct ehea_port *port;
+ struct device *port_dev;
+ int jumbo;
+
+ /* allocate memory for the port structures */
+ dev = alloc_etherdev(sizeof(struct ehea_port));
+
+ if (!dev) {
+ ehea_error("no mem for net_device");
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
+ port = netdev_priv(dev);
+
+ sema_init(&port->port_lock, 1);
+ port->state = EHEA_PORT_DOWN;
+ port->sig_comp_iv = sq_entries / 10;
+
+ port->adapter = adapter;
+ port->netdev = dev;
+ port->logical_port_id = logical_port_id;
+
+ port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
+
+ port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
+ if (!port->mc_list) {
+ ret = -ENOMEM;
+ goto out_free_ethdev;
+ }
+
+ INIT_LIST_HEAD(&port->mc_list->list);
+
+ ret = ehea_sense_port_attr(port);
+ if (ret)
+ goto out_free_mc_list;
+
+ port_dev = ehea_register_port(port, dn);
+ if (!port_dev)
+ goto out_free_mc_list;
+
+ SET_NETDEV_DEV(dev, port_dev);
/* initialize net_device structure */
SET_MODULE_OWNER(dev);
@@ -2418,79 +2475,216 @@ static int ehea_setup_single_port(struct
ret = register_netdev(dev);
if (ret) {
ehea_error("register_netdev failed. ret=%d", ret);
- goto out_free;
+ goto out_unreg_port;
}
+ ret = ehea_get_jumboframe_status(port, &jumbo);
+ if (ret)
+ ehea_error("failed determining jumbo frame status for %s",
+ port->netdev->name);
+
ehea_info("%s: Jumbo frames are %sabled", dev->name,
jumbo == 1 ? "en" : "dis");
- port->netdev = dev;
- ret = 0;
- goto out;
+ return port;
-out_free:
+out_unreg_port:
+ ehea_unregister_port(port);
+
+out_free_mc_list:
kfree(port->mc_list);
-out:
- return ret;
+
+out_free_ethdev:
+ free_netdev(dev);
+
+out_err:
+ ehea_error("setting up logical port with id=%d failed, ret=%d",
+ logical_port_id, ret);
+ return NULL;
+}
+
+static void ehea_shutdown_single_port(struct ehea_port *port)
+{
+ unregister_netdev(port->netdev);
+ ehea_unregister_port(port);
+ kfree(port->mc_list);
+ free_netdev(port->netdev);
}
static int ehea_setup_ports(struct ehea_adapter *adapter)
{
- int ret;
+ struct device_node *lhea_dn;
+ struct device_node *eth_dn = NULL;
+
+ u32 *dn_log_port_id;
int port_setup_ok = 0;
- struct ehea_port *port;
- struct device_node *dn = NULL;
- struct net_device *dev;
- int i;
+ int i = 0;
+
+ lhea_dn = adapter->ebus_dev->ofdev.node;
+ do {
+ eth_dn = of_get_next_child(lhea_dn, eth_dn);
+ if (!eth_dn)
+ break;
- /* get port properties for all ports */
- for (i = 0; i < adapter->num_ports; i++) {
+ dn_log_port_id = (u32*)get_property(eth_dn, "ibm,hea-port-no",
+ NULL);
+ if (!dn_log_port_id) {
+ ehea_error("bad device node: eth_dn name=%s",
+ eth_dn->full_name);
+ continue;
+ }
+ adapter->port[i] = ehea_setup_single_port(adapter,
+ *dn_log_port_id,
+ eth_dn);
if (adapter->port[i])
- continue; /* port already up and running */
+ ehea_info("%s -> logical port id #%d",
+ adapter->port[i]->netdev->name,
+ *dn_log_port_id);
+ i++;
+ } while (eth_dn);
+
+ of_node_put(lhea_dn);
- /* allocate memory for the port structures */
- dev = alloc_etherdev(sizeof(struct ehea_port));
+ /* Check for succesfully set up ports */
+ for (i = 0; i < EHEA_MAX_PORTS; i++)
+ if (adapter->port[i])
+ port_setup_ok++;
- if (!dev) {
- ehea_error("no mem for net_device");
+ if (port_setup_ok)
+ return 0; /* At least some ports are setup correctly */
+
+ return -EINVAL;
+}
+
+static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
+ u32 logical_port_id)
+{
+ struct device_node *lhea_dn;
+ struct device_node *eth_dn = NULL;
+ u32 *dn_log_port_id;
+
+ lhea_dn = adapter->ebus_dev->ofdev.node;
+ do {
+ eth_dn = of_get_next_child(lhea_dn, eth_dn);
+ if (!eth_dn)
break;
- }
- port = netdev_priv(dev);
- port->adapter = adapter;
- port->netdev = dev;
- adapter->port[i] = port;
- port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
+ dn_log_port_id = (u32*)get_property(eth_dn, "ibm,hea-port-no",
+ NULL);
- dn = of_find_node_by_name(dn, "ethernet");
- ret = ehea_setup_single_port(port, dn);
- if (ret) {
- /* Free mem for this port struct. The others will be
- processed on rollback */
- free_netdev(dev);
- adapter->port[i] = NULL;
- ehea_error("eHEA port %d setup failed, ret=%d", i, ret);
- }
+ if (dn_log_port_id)
+ if (*dn_log_port_id == logical_port_id)
+ return eth_dn;
+
+ } while (eth_dn);
+
+ of_node_put(lhea_dn);
+
+ return NULL;
+}
+
+static ssize_t ehea_probe_port(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ehea_adapter *adapter = dev->driver_data;
+ struct ehea_port *port;
+ struct device_node *eth_dn = NULL;
+ int i;
+
+ u32 logical_port_id;
+
+ sscanf(buf, "%X", &logical_port_id);
+
+ port = ehea_get_port(adapter, logical_port_id);
+
+ if (port) {
+ ehea_info("adding port with logical port id=%d failed. port "
+ "already configured as %s.", logical_port_id,
+ port->netdev->name);
+ return -EINVAL;
}
+
+ eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
- of_node_put(dn);
+ if (!eth_dn) {
+ ehea_info("no logical port with id %d found", logical_port_id);
+ return -EINVAL;
+ }
+
+ port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
- /* Check for succesfully set up ports */
- for (i = 0; i < adapter->num_ports; i++)
- if (adapter->port[i])
- port_setup_ok++;
+ if (port) {
+ for (i=0; i < EHEA_MAX_PORTS; i++)
+ if (!adapter->port[i]) {
+ adapter->port[i] = port;
+ break;
+ }
- if (port_setup_ok)
- ret = 0; /* At least some ports are setup correctly */
- else
- ret = -EINVAL;
+ ehea_info("added %s (logical port id=%d)", port->netdev->name,
+ logical_port_id);
+ } else
+ return -EIO;
+ return (ssize_t) count;
+}
+
+static ssize_t ehea_remove_port(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ehea_adapter *adapter = dev->driver_data;
+ struct ehea_port *port;
+ int i;
+ u32 logical_port_id;
+
+ sscanf(buf, "%X", &logical_port_id);
+
+ port = ehea_get_port(adapter, logical_port_id);
+
+ if (port) {
+ ehea_info("removed %s (logical port id=%d)", port->netdev->name,
+ logical_port_id);
+
+ ehea_shutdown_single_port(port);
+
+ for (i=0; i < EHEA_MAX_PORTS; i++)
+ if (adapter->port[i] == port) {
+ adapter->port[i] = NULL;
+ break;
+ }
+ } else {
+ ehea_error("removing port with logical port id=%d failed. port "
+ "not configured.", logical_port_id);
+ return -EINVAL;
+ }
+
+ return (ssize_t) count;
+}
+
+static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
+static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
+
+int ehea_create_device_sysfs(struct ibmebus_dev *dev)
+{
+ int ret = device_create_file(&dev->ofdev.dev, &dev_attr_probe_port);
+ if (ret)
+ goto out;
+
+ ret = device_create_file(&dev->ofdev.dev, &dev_attr_remove_port);
+out:
return ret;
}
-static int __devinit ehea_probe(struct ibmebus_dev *dev,
- const struct of_device_id *id)
+void ehea_remove_device_sysfs(struct ibmebus_dev *dev)
+{
+ device_remove_file(&dev->ofdev.dev, &dev_attr_probe_port);
+ device_remove_file(&dev->ofdev.dev, &dev_attr_remove_port);
+}
+
+static int __devinit ehea_probe_adapter(struct ibmebus_dev *dev,
+ const struct of_device_id *id)
{
struct ehea_adapter *adapter;
u64 *adapter_handle;
@@ -2503,6 +2697,8 @@ static int __devinit ehea_probe(struct i
goto out;
}
+ adapter->ebus_dev = dev;
+
adapter_handle = (u64*)get_property(dev->ofdev.node, "ibm,hea-handle",
NULL);
if (adapter_handle)
@@ -2532,7 +2728,6 @@ static int __devinit ehea_probe(struct i
dev_err(&dev->ofdev.dev, "sense_adapter_attr failed: %d", ret);
goto out_free_res;
}
- dev_info(&dev->ofdev.dev, "%d eHEA ports found\n", adapter->num_ports);
adapter->neq = ehea_create_eq(adapter,
EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
@@ -2556,15 +2751,21 @@ static int __devinit ehea_probe(struct i
if (!adapter->ehea_wq)
goto out_free_irq;
+ if (ehea_create_device_sysfs(dev))
+ goto out_kill_wq;
+
ret = ehea_setup_ports(adapter);
if (ret) {
dev_err(&dev->ofdev.dev, "setup_ports failed");
- goto out_kill_wq;
+ goto out_rem_dev_sysfs;
}
ret = 0;
goto out;
+out_rem_dev_sysfs:
+ ehea_remove_device_sysfs(dev);
+
out_kill_wq:
destroy_workqueue(adapter->ehea_wq);
@@ -2583,24 +2784,20 @@ out:
return ret;
}
-static void ehea_shutdown_single_port(struct ehea_port *port)
-{
- unregister_netdev(port->netdev);
- kfree(port->mc_list);
- free_netdev(port->netdev);
-}
-
static int __devexit ehea_remove(struct ibmebus_dev *dev)
{
struct ehea_adapter *adapter = dev->ofdev.dev.driver_data;
u64 hret;
int i;
- for (i = 0; i < adapter->num_ports; i++)
+ for (i = 0; i < EHEA_MAX_PORTS; i++)
if (adapter->port[i]) {
ehea_shutdown_single_port(adapter->port[i]);
adapter->port[i] = NULL;
}
+
+ ehea_remove_device_sysfs(dev);
+
destroy_workqueue(adapter->ehea_wq);
ibmebus_free_irq(NULL, adapter->neq->attr.ist1, adapter);
@@ -2656,7 +2853,7 @@ static struct of_device_id ehea_device_t
static struct ibmebus_driver ehea_driver = {
.name = "ehea",
.id_table = ehea_device_table,
- .probe = ehea_probe,
+ .probe = ehea_probe_adapter,
.remove = ehea_remove,
};
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