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path: root/drivers/net/netdevsim/bus.c
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Diffstat (limited to 'drivers/net/netdevsim/bus.c')
-rw-r--r--drivers/net/netdevsim/bus.c129
1 files changed, 114 insertions, 15 deletions
diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c
index 0e9511661601..ccec29970d5b 100644
--- a/drivers/net/netdevsim/bus.c
+++ b/drivers/net/netdevsim/bus.c
@@ -27,21 +27,34 @@ static struct nsim_bus_dev *to_nsim_bus_dev(struct device *dev)
static int nsim_bus_dev_vfs_enable(struct nsim_bus_dev *nsim_bus_dev,
unsigned int num_vfs)
{
- nsim_bus_dev->vfconfigs = kcalloc(num_vfs,
- sizeof(struct nsim_vf_config),
- GFP_KERNEL | __GFP_NOWARN);
+ struct nsim_dev *nsim_dev;
+ int err = 0;
+
+ if (nsim_bus_dev->max_vfs < num_vfs)
+ return -ENOMEM;
+
if (!nsim_bus_dev->vfconfigs)
return -ENOMEM;
nsim_bus_dev->num_vfs = num_vfs;
- return 0;
+ nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
+ if (nsim_esw_mode_is_switchdev(nsim_dev)) {
+ err = nsim_esw_switchdev_enable(nsim_dev, NULL);
+ if (err)
+ nsim_bus_dev->num_vfs = 0;
+ }
+
+ return err;
}
-static void nsim_bus_dev_vfs_disable(struct nsim_bus_dev *nsim_bus_dev)
+void nsim_bus_dev_vfs_disable(struct nsim_bus_dev *nsim_bus_dev)
{
- kfree(nsim_bus_dev->vfconfigs);
- nsim_bus_dev->vfconfigs = NULL;
+ struct nsim_dev *nsim_dev;
+
nsim_bus_dev->num_vfs = 0;
+ nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
+ if (nsim_esw_mode_is_switchdev(nsim_dev))
+ nsim_esw_legacy_enable(nsim_dev, NULL);
}
static ssize_t
@@ -56,7 +69,7 @@ nsim_bus_dev_numvfs_store(struct device *dev, struct device_attribute *attr,
if (ret)
return ret;
- rtnl_lock();
+ mutex_lock(&nsim_bus_dev->vfs_lock);
if (nsim_bus_dev->num_vfs == num_vfs)
goto exit_good;
if (nsim_bus_dev->num_vfs && num_vfs) {
@@ -74,7 +87,7 @@ nsim_bus_dev_numvfs_store(struct device *dev, struct device_attribute *attr,
exit_good:
ret = count;
exit_unlock:
- rtnl_unlock();
+ mutex_unlock(&nsim_bus_dev->vfs_lock);
return ret;
}
@@ -92,6 +105,79 @@ static struct device_attribute nsim_bus_dev_numvfs_attr =
__ATTR(sriov_numvfs, 0664, nsim_bus_dev_numvfs_show,
nsim_bus_dev_numvfs_store);
+ssize_t nsim_bus_dev_max_vfs_read(struct file *file,
+ char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct nsim_bus_dev *nsim_bus_dev = file->private_data;
+ char buf[11];
+ ssize_t len;
+
+ len = snprintf(buf, sizeof(buf), "%u\n", nsim_bus_dev->max_vfs);
+ if (len < 0)
+ return len;
+
+ return simple_read_from_buffer(data, count, ppos, buf, len);
+}
+
+ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
+ const char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct nsim_bus_dev *nsim_bus_dev = file->private_data;
+ struct nsim_vf_config *vfconfigs;
+ ssize_t ret;
+ char buf[10];
+ u32 val;
+
+ if (*ppos != 0)
+ return 0;
+
+ if (count >= sizeof(buf))
+ return -ENOSPC;
+
+ mutex_lock(&nsim_bus_dev->vfs_lock);
+ /* Reject if VFs are configured */
+ if (nsim_bus_dev->num_vfs) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ ret = copy_from_user(buf, data, count);
+ if (ret) {
+ ret = -EFAULT;
+ goto unlock;
+ }
+
+ buf[count] = '\0';
+ ret = kstrtouint(buf, 10, &val);
+ if (ret) {
+ ret = -EIO;
+ goto unlock;
+ }
+
+ /* max_vfs limited by the maximum number of provided port indexes */
+ if (val > NSIM_DEV_VF_PORT_INDEX_MAX - NSIM_DEV_VF_PORT_INDEX_BASE) {
+ ret = -ERANGE;
+ goto unlock;
+ }
+
+ vfconfigs = kcalloc(val, sizeof(struct nsim_vf_config), GFP_KERNEL | __GFP_NOWARN);
+ if (!vfconfigs) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+
+ kfree(nsim_bus_dev->vfconfigs);
+ nsim_bus_dev->vfconfigs = vfconfigs;
+ nsim_bus_dev->max_vfs = val;
+ *ppos += count;
+ ret = count;
+unlock:
+ mutex_unlock(&nsim_bus_dev->vfs_lock);
+ return ret;
+}
+
static ssize_t
new_port_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
@@ -113,7 +199,7 @@ new_port_store(struct device *dev, struct device_attribute *attr,
mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock);
devlink_reload_disable(devlink);
- ret = nsim_dev_port_add(nsim_bus_dev, port_index);
+ ret = nsim_dev_port_add(nsim_bus_dev, NSIM_DEV_PORT_TYPE_PF, port_index);
devlink_reload_enable(devlink);
mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
return ret ? ret : count;
@@ -142,7 +228,7 @@ del_port_store(struct device *dev, struct device_attribute *attr,
mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock);
devlink_reload_disable(devlink);
- ret = nsim_dev_port_del(nsim_bus_dev, port_index);
+ ret = nsim_dev_port_del(nsim_bus_dev, NSIM_DEV_PORT_TYPE_PF, port_index);
devlink_reload_enable(devlink);
mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock);
return ret ? ret : count;
@@ -168,9 +254,6 @@ static const struct attribute_group *nsim_bus_dev_attr_groups[] = {
static void nsim_bus_dev_release(struct device *dev)
{
- struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev);
-
- nsim_bus_dev_vfs_disable(nsim_bus_dev);
}
static struct device_type nsim_bus_dev_type = {
@@ -311,6 +394,8 @@ static struct bus_type nsim_bus = {
.num_vf = nsim_num_vf,
};
+#define NSIM_BUS_DEV_MAX_VFS 4
+
static struct nsim_bus_dev *
nsim_bus_dev_new(unsigned int id, unsigned int port_count)
{
@@ -329,15 +414,28 @@ nsim_bus_dev_new(unsigned int id, unsigned int port_count)
nsim_bus_dev->dev.type = &nsim_bus_dev_type;
nsim_bus_dev->port_count = port_count;
nsim_bus_dev->initial_net = current->nsproxy->net_ns;
+ nsim_bus_dev->max_vfs = NSIM_BUS_DEV_MAX_VFS;
mutex_init(&nsim_bus_dev->nsim_bus_reload_lock);
+ mutex_init(&nsim_bus_dev->vfs_lock);
/* Disallow using nsim_bus_dev */
smp_store_release(&nsim_bus_dev->init, false);
+ nsim_bus_dev->vfconfigs = kcalloc(nsim_bus_dev->max_vfs,
+ sizeof(struct nsim_vf_config),
+ GFP_KERNEL | __GFP_NOWARN);
+ if (!nsim_bus_dev->vfconfigs) {
+ err = -ENOMEM;
+ goto err_nsim_bus_dev_id_free;
+ }
+
err = device_register(&nsim_bus_dev->dev);
if (err)
- goto err_nsim_bus_dev_id_free;
+ goto err_nsim_vfs_free;
+
return nsim_bus_dev;
+err_nsim_vfs_free:
+ kfree(nsim_bus_dev->vfconfigs);
err_nsim_bus_dev_id_free:
ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id);
err_nsim_bus_dev_free:
@@ -351,6 +449,7 @@ static void nsim_bus_dev_del(struct nsim_bus_dev *nsim_bus_dev)
smp_store_release(&nsim_bus_dev->init, false);
device_unregister(&nsim_bus_dev->dev);
ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id);
+ kfree(nsim_bus_dev->vfconfigs);
kfree(nsim_bus_dev);
}