#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
+#include <linux/netdevice.h>
+#include <net/addrconf.h>
#include <rdma/ib_cache.h>
u16 table[0];
};
-struct ib_gid_cache {
- int table_len;
- union ib_gid table[0];
-};
-
struct ib_update_work {
struct work_struct work;
struct ib_device *device;
u8 port_num;
};
-static inline int start_port(struct ib_device *device)
+union ib_gid zgid;
+EXPORT_SYMBOL(zgid);
+
+static const struct ib_gid_attr zattr;
+
+enum gid_attr_find_mask {
+ GID_ATTR_FIND_MASK_GID = 1UL << 0,
+ GID_ATTR_FIND_MASK_NETDEV = 1UL << 1,
+ GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2,
+};
+
+enum gid_table_entry_props {
+ GID_TABLE_ENTRY_INVALID = 1UL << 0,
+ GID_TABLE_ENTRY_DEFAULT = 1UL << 1,
+};
+
+enum gid_table_write_action {
+ GID_TABLE_WRITE_ACTION_ADD,
+ GID_TABLE_WRITE_ACTION_DEL,
+ /* MODIFY only updates the GID table. Currently only used by
+ * ib_cache_update.
+ */
+ GID_TABLE_WRITE_ACTION_MODIFY
+};
+
+struct ib_gid_table_entry {
+ /* This lock protects an entry from being
+ * read and written simultaneously.
+ */
+ rwlock_t lock;
+ unsigned long props;
+ union ib_gid gid;
+ struct ib_gid_attr attr;
+ void *context;
+};
+
+struct ib_gid_table {
+ int sz;
+ /* In RoCE, adding a GID to the table requires:
+ * (a) Find if this GID is already exists.
+ * (b) Find a free space.
+ * (c) Write the new GID
+ *
+ * Delete requires different set of operations:
+ * (a) Find the GID
+ * (b) Delete it.
+ *
+ * Add/delete should be carried out atomically.
+ * This is done by locking this mutex from multiple
+ * writers. We don't need this lock for IB, as the MAD
+ * layer replaces all entries. All data_vec entries
+ * are locked by this lock.
+ **/
+ struct mutex lock;
+ struct ib_gid_table_entry *data_vec;
+};
+
+static int write_gid(struct ib_device *ib_dev, u8 port,
+ struct ib_gid_table *table, int ix,
+ const union ib_gid *gid,
+ const struct ib_gid_attr *attr,
+ enum gid_table_write_action action,
+ bool default_gid)
+{
+ int ret = 0;
+ struct net_device *old_net_dev;
+ unsigned long flags;
+
+ /* in rdma_cap_roce_gid_table, this funciton should be protected by a
+ * sleep-able lock.
+ */
+ write_lock_irqsave(&table->data_vec[ix].lock, flags);
+
+ if (rdma_cap_roce_gid_table(ib_dev, port)) {
+ table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID;
+ write_unlock_irqrestore(&table->data_vec[ix].lock, flags);
+ /* GID_TABLE_WRITE_ACTION_MODIFY currently isn't supported by
+ * RoCE providers and thus only updates the cache.
+ */
+ if (action == GID_TABLE_WRITE_ACTION_ADD)
+ ret = ib_dev->add_gid(ib_dev, port, ix, gid, attr,
+ &table->data_vec[ix].context);
+ else if (action == GID_TABLE_WRITE_ACTION_DEL)
+ ret = ib_dev->del_gid(ib_dev, port, ix,
+ &table->data_vec[ix].context);
+ write_lock_irqsave(&table->data_vec[ix].lock, flags);
+ }
+
+ old_net_dev = table->data_vec[ix].attr.ndev;
+ if (old_net_dev && old_net_dev != attr->ndev)
+ dev_put(old_net_dev);
+ /* if modify_gid failed, just delete the old gid */
+ if (ret || action == GID_TABLE_WRITE_ACTION_DEL) {
+ gid = &zgid;
+ attr = &zattr;
+ table->data_vec[ix].context = NULL;
+ }
+ if (default_gid)
+ table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT;
+ memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid));
+ memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr));
+ if (table->data_vec[ix].attr.ndev &&
+ table->data_vec[ix].attr.ndev != old_net_dev)
+ dev_hold(table->data_vec[ix].attr.ndev);
+
+ table->data_vec[ix].props &= ~GID_TABLE_ENTRY_INVALID;
+
+ write_unlock_irqrestore(&table->data_vec[ix].lock, flags);
+
+ if (!ret && rdma_cap_roce_gid_table(ib_dev, port)) {
+ struct ib_event event;
+
+ event.device = ib_dev;
+ event.element.port_num = port;
+ event.event = IB_EVENT_GID_CHANGE;
+
+ ib_dispatch_event(&event);
+ }
+ return ret;
+}
+
+static int add_gid(struct ib_device *ib_dev, u8 port,
+ struct ib_gid_table *table, int ix,
+ const union ib_gid *gid,
+ const struct ib_gid_attr *attr,
+ bool default_gid) {
+ return write_gid(ib_dev, port, table, ix, gid, attr,
+ GID_TABLE_WRITE_ACTION_ADD, default_gid);
+}
+
+static int modify_gid(struct ib_device *ib_dev, u8 port,
+ struct ib_gid_table *table, int ix,
+ const union ib_gid *gid,
+ const struct ib_gid_attr *attr,
+ bool default_gid) {
+ return write_gid(ib_dev, port, table, ix, gid, attr,
+ GID_TABLE_WRITE_ACTION_MODIFY, default_gid);
+}
+
+static int del_gid(struct ib_device *ib_dev, u8 port,
+ struct ib_gid_table *table, int ix,
+ bool default_gid) {
+ return write_gid(ib_dev, port, table, ix, &zgid, &zattr,
+ GID_TABLE_WRITE_ACTION_DEL, default_gid);
+}
+
+static int find_gid(struct ib_gid_table *table, const union ib_gid *gid,
+ const struct ib_gid_attr *val, bool default_gid,
+ unsigned long mask)
{
- return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1;
+ int i;
+
+ for (i = 0; i < table->sz; i++) {
+ unsigned long flags;
+ struct ib_gid_attr *attr = &table->data_vec[i].attr;
+
+ read_lock_irqsave(&table->data_vec[i].lock, flags);
+
+ if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID)
+ goto next;
+
+ if (mask & GID_ATTR_FIND_MASK_GID &&
+ memcmp(gid, &table->data_vec[i].gid, sizeof(*gid)))
+ goto next;
+
+ if (mask & GID_ATTR_FIND_MASK_NETDEV &&
+ attr->ndev != val->ndev)
+ goto next;
+
+ if (mask & GID_ATTR_FIND_MASK_DEFAULT &&
+ !!(table->data_vec[i].props & GID_TABLE_ENTRY_DEFAULT) !=
+ default_gid)
+ goto next;
+
+ read_unlock_irqrestore(&table->data_vec[i].lock, flags);
+ return i;
+next:
+ read_unlock_irqrestore(&table->data_vec[i].lock, flags);
+ }
+
+ return -1;
}
-static inline int end_port(struct ib_device *device)
+static void make_default_gid(struct net_device *dev, union ib_gid *gid)
{
- return (device->node_type == RDMA_NODE_IB_SWITCH) ?
- 0 : device->phys_port_cnt;
+ gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
+ addrconf_ifid_eui48(&gid->raw[8], dev);
}
-int ib_get_cached_gid(struct ib_device *device,
- u8 port_num,
- int index,
- union ib_gid *gid)
+int ib_cache_gid_add(struct ib_device *ib_dev, u8 port,
+ union ib_gid *gid, struct ib_gid_attr *attr)
{
- struct ib_gid_cache *cache;
- unsigned long flags;
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ struct ib_gid_table *table;
+ int ix;
int ret = 0;
+ struct net_device *idev;
- if (port_num < start_port(device) || port_num > end_port(device))
+ table = ports_table[port - rdma_start_port(ib_dev)];
+
+ if (!memcmp(gid, &zgid, sizeof(*gid)))
return -EINVAL;
- read_lock_irqsave(&device->cache.lock, flags);
+ if (ib_dev->get_netdev) {
+ idev = ib_dev->get_netdev(ib_dev, port);
+ if (idev && attr->ndev != idev) {
+ union ib_gid default_gid;
- cache = device->cache.gid_cache[port_num - start_port(device)];
+ /* Adding default GIDs in not permitted */
+ make_default_gid(idev, &default_gid);
+ if (!memcmp(gid, &default_gid, sizeof(*gid))) {
+ dev_put(idev);
+ return -EPERM;
+ }
+ }
+ if (idev)
+ dev_put(idev);
+ }
- if (index < 0 || index >= cache->table_len)
- ret = -EINVAL;
- else
- *gid = cache->table[index];
+ mutex_lock(&table->lock);
- read_unlock_irqrestore(&device->cache.lock, flags);
+ ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID |
+ GID_ATTR_FIND_MASK_NETDEV);
+ if (ix >= 0)
+ goto out_unlock;
+
+ ix = find_gid(table, &zgid, NULL, false, GID_ATTR_FIND_MASK_GID |
+ GID_ATTR_FIND_MASK_DEFAULT);
+ if (ix < 0) {
+ ret = -ENOSPC;
+ goto out_unlock;
+ }
+ add_gid(ib_dev, port, table, ix, gid, attr, false);
+
+out_unlock:
+ mutex_unlock(&table->lock);
return ret;
}
-EXPORT_SYMBOL(ib_get_cached_gid);
-int ib_find_cached_gid(struct ib_device *device,
- union ib_gid *gid,
- u8 *port_num,
- u16 *index)
+int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
+ union ib_gid *gid, struct ib_gid_attr *attr)
+{
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ struct ib_gid_table *table;
+ int ix;
+
+ table = ports_table[port - rdma_start_port(ib_dev)];
+
+ mutex_lock(&table->lock);
+
+ ix = find_gid(table, gid, attr, false,
+ GID_ATTR_FIND_MASK_GID |
+ GID_ATTR_FIND_MASK_NETDEV |
+ GID_ATTR_FIND_MASK_DEFAULT);
+ if (ix < 0)
+ goto out_unlock;
+
+ del_gid(ib_dev, port, table, ix, false);
+
+out_unlock:
+ mutex_unlock(&table->lock);
+ return 0;
+}
+
+int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
+ struct net_device *ndev)
{
- struct ib_gid_cache *cache;
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ struct ib_gid_table *table;
+ int ix;
+
+ table = ports_table[port - rdma_start_port(ib_dev)];
+
+ mutex_lock(&table->lock);
+
+ for (ix = 0; ix < table->sz; ix++)
+ if (table->data_vec[ix].attr.ndev == ndev)
+ del_gid(ib_dev, port, table, ix, false);
+
+ mutex_unlock(&table->lock);
+ return 0;
+}
+
+static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index,
+ union ib_gid *gid, struct ib_gid_attr *attr)
+{
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ struct ib_gid_table *table;
unsigned long flags;
- int p, i;
- int ret = -ENOENT;
- *port_num = -1;
+ table = ports_table[port - rdma_start_port(ib_dev)];
+
+ if (index < 0 || index >= table->sz)
+ return -EINVAL;
+
+ read_lock_irqsave(&table->data_vec[index].lock, flags);
+ if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) {
+ read_unlock_irqrestore(&table->data_vec[index].lock, flags);
+ return -EAGAIN;
+ }
+
+ memcpy(gid, &table->data_vec[index].gid, sizeof(*gid));
+ if (attr) {
+ memcpy(attr, &table->data_vec[index].attr, sizeof(*attr));
+ if (attr->ndev)
+ dev_hold(attr->ndev);
+ }
+
+ read_unlock_irqrestore(&table->data_vec[index].lock, flags);
+ return 0;
+}
+
+static int _ib_cache_gid_table_find(struct ib_device *ib_dev,
+ const union ib_gid *gid,
+ const struct ib_gid_attr *val,
+ unsigned long mask,
+ u8 *port, u16 *index)
+{
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ struct ib_gid_table *table;
+ u8 p;
+ int local_index;
+
+ for (p = 0; p < ib_dev->phys_port_cnt; p++) {
+ table = ports_table[p];
+ local_index = find_gid(table, gid, val, false, mask);
+ if (local_index >= 0) {
+ if (index)
+ *index = local_index;
+ if (port)
+ *port = p + rdma_start_port(ib_dev);
+ return 0;
+ }
+ }
+
+ return -ENOENT;
+}
+
+static int ib_cache_gid_find(struct ib_device *ib_dev,
+ const union ib_gid *gid,
+ struct net_device *ndev, u8 *port,
+ u16 *index)
+{
+ unsigned long mask = GID_ATTR_FIND_MASK_GID;
+ struct ib_gid_attr gid_attr_val = {.ndev = ndev};
+
+ if (ndev)
+ mask |= GID_ATTR_FIND_MASK_NETDEV;
+
+ return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val,
+ mask, port, index);
+}
+
+int ib_find_cached_gid_by_port(struct ib_device *ib_dev,
+ const union ib_gid *gid,
+ u8 port, struct net_device *ndev,
+ u16 *index)
+{
+ int local_index;
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ struct ib_gid_table *table;
+ unsigned long mask = GID_ATTR_FIND_MASK_GID;
+ struct ib_gid_attr val = {.ndev = ndev};
+
+ if (port < rdma_start_port(ib_dev) ||
+ port > rdma_end_port(ib_dev))
+ return -ENOENT;
+
+ table = ports_table[port - rdma_start_port(ib_dev)];
+
+ if (ndev)
+ mask |= GID_ATTR_FIND_MASK_NETDEV;
+
+ local_index = find_gid(table, gid, &val, false, mask);
+ if (local_index >= 0) {
+ if (index)
+ *index = local_index;
+ return 0;
+ }
+
+ return -ENOENT;
+}
+EXPORT_SYMBOL(ib_find_cached_gid_by_port);
+
+/**
+ * ib_find_gid_by_filter - Returns the GID table index where a specified
+ * GID value occurs
+ * @device: The device to query.
+ * @gid: The GID value to search for.
+ * @port_num: The port number of the device where the GID value could be
+ * searched.
+ * @filter: The filter function is executed on any matching GID in the table.
+ * If the filter function returns true, the corresponding index is returned,
+ * otherwise, we continue searching the GID table. It's guaranteed that
+ * while filter is executed, ndev field is valid and the structure won't
+ * change. filter is executed in an atomic context. filter must not be NULL.
+ * @index: The index into the cached GID table where the GID was found. This
+ * parameter may be NULL.
+ *
+ * ib_cache_gid_find_by_filter() searches for the specified GID value
+ * of which the filter function returns true in the port's GID table.
+ * This function is only supported on RoCE ports.
+ *
+ */
+static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev,
+ const union ib_gid *gid,
+ u8 port,
+ bool (*filter)(const union ib_gid *,
+ const struct ib_gid_attr *,
+ void *),
+ void *context,
+ u16 *index)
+{
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ struct ib_gid_table *table;
+ unsigned int i;
+ bool found = false;
+
+ if (!ports_table)
+ return -EOPNOTSUPP;
+
+ if (port < rdma_start_port(ib_dev) ||
+ port > rdma_end_port(ib_dev) ||
+ !rdma_protocol_roce(ib_dev, port))
+ return -EPROTONOSUPPORT;
+
+ table = ports_table[port - rdma_start_port(ib_dev)];
+
+ for (i = 0; i < table->sz; i++) {
+ struct ib_gid_attr attr;
+ unsigned long flags;
+
+ read_lock_irqsave(&table->data_vec[i].lock, flags);
+ if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID)
+ goto next;
+
+ if (memcmp(gid, &table->data_vec[i].gid, sizeof(*gid)))
+ goto next;
+
+ memcpy(&attr, &table->data_vec[i].attr, sizeof(attr));
+
+ if (filter(gid, &attr, context))
+ found = true;
+
+next:
+ read_unlock_irqrestore(&table->data_vec[i].lock, flags);
+
+ if (found)
+ break;
+ }
+
+ if (!found)
+ return -ENOENT;
+
if (index)
- *index = -1;
+ *index = i;
+ return 0;
+}
- read_lock_irqsave(&device->cache.lock, flags);
+static struct ib_gid_table *alloc_gid_table(int sz)
+{
+ unsigned int i;
+ struct ib_gid_table *table =
+ kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL);
+ if (!table)
+ return NULL;
- for (p = 0; p <= end_port(device) - start_port(device); ++p) {
- cache = device->cache.gid_cache[p];
- for (i = 0; i < cache->table_len; ++i) {
- if (!memcmp(gid, &cache->table[i], sizeof *gid)) {
- *port_num = p + start_port(device);
- if (index)
- *index = i;
- ret = 0;
- goto found;
- }
+ table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL);
+ if (!table->data_vec)
+ goto err_free_table;
+
+ mutex_init(&table->lock);
+
+ table->sz = sz;
+
+ for (i = 0; i < sz; i++)
+ rwlock_init(&table->data_vec[i].lock);
+
+ return table;
+
+err_free_table:
+ kfree(table);
+ return NULL;
+}
+
+static void release_gid_table(struct ib_gid_table *table)
+{
+ if (table) {
+ kfree(table->data_vec);
+ kfree(table);
+ }
+}
+
+static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port,
+ struct ib_gid_table *table)
+{
+ int i;
+
+ if (!table)
+ return;
+
+ for (i = 0; i < table->sz; ++i) {
+ if (memcmp(&table->data_vec[i].gid, &zgid,
+ sizeof(table->data_vec[i].gid)))
+ del_gid(ib_dev, port, table, i,
+ table->data_vec[i].props &
+ GID_ATTR_FIND_MASK_DEFAULT);
+ }
+}
+
+void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port,
+ struct net_device *ndev,
+ enum ib_cache_gid_default_mode mode)
+{
+ struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
+ union ib_gid gid;
+ struct ib_gid_attr gid_attr;
+ struct ib_gid_table *table;
+ int ix;
+ union ib_gid current_gid;
+ struct ib_gid_attr current_gid_attr = {};
+
+ table = ports_table[port - rdma_start_port(ib_dev)];
+
+ make_default_gid(ndev, &gid);
+ memset(&gid_attr, 0, sizeof(gid_attr));
+ gid_attr.ndev = ndev;
+
+ mutex_lock(&table->lock);
+ ix = find_gid(table, NULL, NULL, true, GID_ATTR_FIND_MASK_DEFAULT);
+
+ /* Coudn't find default GID location */
+ WARN_ON(ix < 0);
+
+ if (!__ib_cache_gid_get(ib_dev, port, ix,
+ ¤t_gid, ¤t_gid_attr) &&
+ mode == IB_CACHE_GID_DEFAULT_MODE_SET &&
+ !memcmp(&gid, ¤t_gid, sizeof(gid)) &&
+ !memcmp(&gid_attr, ¤t_gid_attr, sizeof(gid_attr)))
+ goto unlock;
+
+ if ((memcmp(¤t_gid, &zgid, sizeof(current_gid)) ||
+ memcmp(¤t_gid_attr, &zattr,
+ sizeof(current_gid_attr))) &&
+ del_gid(ib_dev, port, table, ix, true)) {
+ pr_warn("ib_cache_gid: can't delete index %d for default gid %pI6\n",
+ ix, gid.raw);
+ goto unlock;
+ }
+
+ if (mode == IB_CACHE_GID_DEFAULT_MODE_SET)
+ if (add_gid(ib_dev, port, table, ix, &gid, &gid_attr, true))
+ pr_warn("ib_cache_gid: unable to add default gid %pI6\n",
+ gid.raw);
+
+unlock:
+ if (current_gid_attr.ndev)
+ dev_put(current_gid_attr.ndev);
+ mutex_unlock(&table->lock);
+}
+
+static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port,
+ struct ib_gid_table *table)
+{
+ if (rdma_protocol_roce(ib_dev, port)) {
+ struct ib_gid_table_entry *entry = &table->data_vec[0];
+
+ entry->props |= GID_TABLE_ENTRY_DEFAULT;
+ }
+
+ return 0;
+}
+
+static int _gid_table_setup_one(struct ib_device *ib_dev)
+{
+ u8 port;
+ struct ib_gid_table **table;
+ int err = 0;
+
+ table = kcalloc(ib_dev->phys_port_cnt, sizeof(*table), GFP_KERNEL);
+
+ if (!table) {
+ pr_warn("failed to allocate ib gid cache for %s\n",
+ ib_dev->name);
+ return -ENOMEM;
+ }
+
+ for (port = 0; port < ib_dev->phys_port_cnt; port++) {
+ u8 rdma_port = port + rdma_start_port(ib_dev);
+
+ table[port] =
+ alloc_gid_table(
+ ib_dev->port_immutable[rdma_port].gid_tbl_len);
+ if (!table[port]) {
+ err = -ENOMEM;
+ goto rollback_table_setup;
}
+
+ err = gid_table_reserve_default(ib_dev,
+ port + rdma_start_port(ib_dev),
+ table[port]);
+ if (err)
+ goto rollback_table_setup;
}
-found:
- read_unlock_irqrestore(&device->cache.lock, flags);
- return ret;
+ ib_dev->cache.gid_cache = table;
+ return 0;
+
+rollback_table_setup:
+ for (port = 0; port < ib_dev->phys_port_cnt; port++) {
+ cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
+ table[port]);
+ release_gid_table(table[port]);
+ }
+
+ kfree(table);
+ return err;
+}
+
+static void gid_table_release_one(struct ib_device *ib_dev)
+{
+ struct ib_gid_table **table = ib_dev->cache.gid_cache;
+ u8 port;
+
+ if (!table)
+ return;
+
+ for (port = 0; port < ib_dev->phys_port_cnt; port++)
+ release_gid_table(table[port]);
+
+ kfree(table);
+ ib_dev->cache.gid_cache = NULL;
+}
+
+static void gid_table_cleanup_one(struct ib_device *ib_dev)
+{
+ struct ib_gid_table **table = ib_dev->cache.gid_cache;
+ u8 port;
+
+ if (!table)
+ return;
+
+ for (port = 0; port < ib_dev->phys_port_cnt; port++)
+ cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
+ table[port]);
+}
+
+static int gid_table_setup_one(struct ib_device *ib_dev)
+{
+ int err;
+
+ err = _gid_table_setup_one(ib_dev);
+
+ if (err)
+ return err;
+
+ err = roce_rescan_device(ib_dev);
+
+ if (err) {
+ gid_table_cleanup_one(ib_dev);
+ gid_table_release_one(ib_dev);
+ }
+
+ return err;
+}
+
+int ib_get_cached_gid(struct ib_device *device,
+ u8 port_num,
+ int index,
+ union ib_gid *gid,
+ struct ib_gid_attr *gid_attr)
+{
+ if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+ return -EINVAL;
+
+ return __ib_cache_gid_get(device, port_num, index, gid, gid_attr);
+}
+EXPORT_SYMBOL(ib_get_cached_gid);
+
+int ib_find_cached_gid(struct ib_device *device,
+ const union ib_gid *gid,
+ struct net_device *ndev,
+ u8 *port_num,
+ u16 *index)
+{
+ return ib_cache_gid_find(device, gid, ndev, port_num, index);
}
EXPORT_SYMBOL(ib_find_cached_gid);
+int ib_find_gid_by_filter(struct ib_device *device,
+ const union ib_gid *gid,
+ u8 port_num,
+ bool (*filter)(const union ib_gid *gid,
+ const struct ib_gid_attr *,
+ void *),
+ void *context, u16 *index)
+{
+ /* Only RoCE GID table supports filter function */
+ if (!rdma_cap_roce_gid_table(device, port_num) && filter)
+ return -EPROTONOSUPPORT;
+
+ return ib_cache_gid_find_by_filter(device, gid,
+ port_num, filter,
+ context, index);
+}
+EXPORT_SYMBOL(ib_find_gid_by_filter);
+
int ib_get_cached_pkey(struct ib_device *device,
u8 port_num,
int index,
unsigned long flags;
int ret = 0;
- if (port_num < start_port(device) || port_num > end_port(device))
+ if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
return -EINVAL;
read_lock_irqsave(&device->cache.lock, flags);
- cache = device->cache.pkey_cache[port_num - start_port(device)];
+ cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
if (index < 0 || index >= cache->table_len)
ret = -EINVAL;
int ret = -ENOENT;
int partial_ix = -1;
- if (port_num < start_port(device) || port_num > end_port(device))
+ if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
return -EINVAL;
read_lock_irqsave(&device->cache.lock, flags);
- cache = device->cache.pkey_cache[port_num - start_port(device)];
+ cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
*index = -1;
int i;
int ret = -ENOENT;
- if (port_num < start_port(device) || port_num > end_port(device))
+ if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
return -EINVAL;
read_lock_irqsave(&device->cache.lock, flags);
- cache = device->cache.pkey_cache[port_num - start_port(device)];
+ cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
*index = -1;
unsigned long flags;
int ret = 0;
- if (port_num < start_port(device) || port_num > end_port(device))
+ if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
return -EINVAL;
read_lock_irqsave(&device->cache.lock, flags);
- *lmc = device->cache.lmc_cache[port_num - start_port(device)];
+ *lmc = device->cache.lmc_cache[port_num - rdma_start_port(device)];
read_unlock_irqrestore(&device->cache.lock, flags);
return ret;
{
struct ib_port_attr *tprops = NULL;
struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache;
- struct ib_gid_cache *gid_cache = NULL, *old_gid_cache;
+ struct ib_gid_cache {
+ int table_len;
+ union ib_gid table[0];
+ } *gid_cache = NULL;
int i;
int ret;
+ struct ib_gid_table *table;
+ struct ib_gid_table **ports_table = device->cache.gid_cache;
+ bool use_roce_gid_table =
+ rdma_cap_roce_gid_table(device, port);
+
+ if (port < rdma_start_port(device) || port > rdma_end_port(device))
+ return;
+
+ table = ports_table[port - rdma_start_port(device)];
tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
if (!tprops)
pkey_cache->table_len = tprops->pkey_tbl_len;
- gid_cache = kmalloc(sizeof *gid_cache + tprops->gid_tbl_len *
- sizeof *gid_cache->table, GFP_KERNEL);
- if (!gid_cache)
- goto err;
+ if (!use_roce_gid_table) {
+ gid_cache = kmalloc(sizeof(*gid_cache) + tprops->gid_tbl_len *
+ sizeof(*gid_cache->table), GFP_KERNEL);
+ if (!gid_cache)
+ goto err;
- gid_cache->table_len = tprops->gid_tbl_len;
+ gid_cache->table_len = tprops->gid_tbl_len;
+ }
for (i = 0; i < pkey_cache->table_len; ++i) {
ret = ib_query_pkey(device, port, i, pkey_cache->table + i);
}
}
- for (i = 0; i < gid_cache->table_len; ++i) {
- ret = ib_query_gid(device, port, i, gid_cache->table + i);
- if (ret) {
- printk(KERN_WARNING "ib_query_gid failed (%d) for %s (index %d)\n",
- ret, device->name, i);
- goto err;
+ if (!use_roce_gid_table) {
+ for (i = 0; i < gid_cache->table_len; ++i) {
+ ret = ib_query_gid(device, port, i,
+ gid_cache->table + i, NULL);
+ if (ret) {
+ printk(KERN_WARNING "ib_query_gid failed (%d) for %s (index %d)\n",
+ ret, device->name, i);
+ goto err;
+ }
}
}
write_lock_irq(&device->cache.lock);
- old_pkey_cache = device->cache.pkey_cache[port - start_port(device)];
- old_gid_cache = device->cache.gid_cache [port - start_port(device)];
+ old_pkey_cache = device->cache.pkey_cache[port - rdma_start_port(device)];
- device->cache.pkey_cache[port - start_port(device)] = pkey_cache;
- device->cache.gid_cache [port - start_port(device)] = gid_cache;
+ device->cache.pkey_cache[port - rdma_start_port(device)] = pkey_cache;
+ if (!use_roce_gid_table) {
+ for (i = 0; i < gid_cache->table_len; i++) {
+ modify_gid(device, port, table, i, gid_cache->table + i,
+ &zattr, false);
+ }
+ }
- device->cache.lmc_cache[port - start_port(device)] = tprops->lmc;
+ device->cache.lmc_cache[port - rdma_start_port(device)] = tprops->lmc;
write_unlock_irq(&device->cache.lock);
+ kfree(gid_cache);
kfree(old_pkey_cache);
- kfree(old_gid_cache);
kfree(tprops);
return;
}
}
-static void ib_cache_setup_one(struct ib_device *device)
+int ib_cache_setup_one(struct ib_device *device)
{
int p;
+ int err;
rwlock_init(&device->cache.lock);
device->cache.pkey_cache =
- kmalloc(sizeof *device->cache.pkey_cache *
- (end_port(device) - start_port(device) + 1), GFP_KERNEL);
- device->cache.gid_cache =
- kmalloc(sizeof *device->cache.gid_cache *
- (end_port(device) - start_port(device) + 1), GFP_KERNEL);
-
+ kzalloc(sizeof *device->cache.pkey_cache *
+ (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL);
device->cache.lmc_cache = kmalloc(sizeof *device->cache.lmc_cache *
- (end_port(device) -
- start_port(device) + 1),
+ (rdma_end_port(device) -
+ rdma_start_port(device) + 1),
GFP_KERNEL);
-
- if (!device->cache.pkey_cache || !device->cache.gid_cache ||
+ if (!device->cache.pkey_cache ||
!device->cache.lmc_cache) {
printk(KERN_WARNING "Couldn't allocate cache "
"for %s\n", device->name);
- goto err;
+ return -ENOMEM;
}
- for (p = 0; p <= end_port(device) - start_port(device); ++p) {
- device->cache.pkey_cache[p] = NULL;
- device->cache.gid_cache [p] = NULL;
- ib_cache_update(device, p + start_port(device));
- }
+ err = gid_table_setup_one(device);
+ if (err)
+ /* Allocated memory will be cleaned in the release function */
+ return err;
+
+ for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p)
+ ib_cache_update(device, p + rdma_start_port(device));
INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
device, ib_cache_event);
- if (ib_register_event_handler(&device->cache.event_handler))
- goto err_cache;
-
- return;
+ err = ib_register_event_handler(&device->cache.event_handler);
+ if (err)
+ goto err;
-err_cache:
- for (p = 0; p <= end_port(device) - start_port(device); ++p) {
- kfree(device->cache.pkey_cache[p]);
- kfree(device->cache.gid_cache[p]);
- }
+ return 0;
err:
- kfree(device->cache.pkey_cache);
- kfree(device->cache.gid_cache);
- kfree(device->cache.lmc_cache);
+ gid_table_cleanup_one(device);
+ return err;
}
-static void ib_cache_cleanup_one(struct ib_device *device)
+void ib_cache_release_one(struct ib_device *device)
{
int p;
- ib_unregister_event_handler(&device->cache.event_handler);
- flush_workqueue(ib_wq);
-
- for (p = 0; p <= end_port(device) - start_port(device); ++p) {
- kfree(device->cache.pkey_cache[p]);
- kfree(device->cache.gid_cache[p]);
- }
-
+ /*
+ * The release function frees all the cache elements.
+ * This function should be called as part of freeing
+ * all the device's resources when the cache could no
+ * longer be accessed.
+ */
+ if (device->cache.pkey_cache)
+ for (p = 0;
+ p <= rdma_end_port(device) - rdma_start_port(device); ++p)
+ kfree(device->cache.pkey_cache[p]);
+
+ gid_table_release_one(device);
kfree(device->cache.pkey_cache);
- kfree(device->cache.gid_cache);
kfree(device->cache.lmc_cache);
}
-static struct ib_client cache_client = {
- .name = "cache",
- .add = ib_cache_setup_one,
- .remove = ib_cache_cleanup_one
-};
+void ib_cache_cleanup_one(struct ib_device *device)
+{
+ /* The cleanup function unregisters the event handler,
+ * waits for all in-progress workqueue elements and cleans
+ * up the GID cache. This function should be called after
+ * the device was removed from the devices list and all
+ * clients were removed, so the cache exists but is
+ * non-functional and shouldn't be updated anymore.
+ */
+ ib_unregister_event_handler(&device->cache.event_handler);
+ flush_workqueue(ib_wq);
+ gid_table_cleanup_one(device);
+}
-int __init ib_cache_setup(void)
+void __init ib_cache_setup(void)
{
- return ib_register_client(&cache_client);
+ roce_gid_mgmt_init();
}
void __exit ib_cache_cleanup(void)
{
- ib_unregister_client(&cache_client);
+ roce_gid_mgmt_cleanup();
}
Code Review / kvmfornfv.git / blobdiff