cregit-Linux how code gets into the kernel

Release 4.11 drivers/infiniband/core/cache.c

/*
 * Copyright (c) 2004 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Intel Corporation. All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/module.h>
#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>

#include "core_priv.h"


struct ib_pkey_cache {
	
int             table_len;
	
u16             table[0];
};


struct ib_update_work {
	
struct work_struct work;
	
struct ib_device  *device;
	
u8                 port_num;
};


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,
	
GID_ATTR_FIND_MASK_GID_TYPE	= 1UL << 3,
};


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 {
	
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;
	/* This lock protects the table entries from being
         * read and written simultaneously.
         */
	
rwlock_t	     rwlock;
	
struct ib_gid_table_entry *data_vec;
};


static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port) { if (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); } }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak55100.00%1100.00%
Total55100.00%1100.00%

static const char * const gid_type_str[] = { [IB_GID_TYPE_IB] = "IB/RoCE v1", [IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2", };
const char *ib_cache_gid_type_str(enum ib_gid_type gid_type) { if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) return gid_type_str[gid_type]; return "Invalid GID type"; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak34100.00%1100.00%
Total34100.00%1100.00%

EXPORT_SYMBOL(ib_cache_gid_type_str);
int ib_cache_gid_parse_type_str(const char *buf) { unsigned int i; size_t len; int err = -EINVAL; len = strlen(buf); if (len == 0) return -EINVAL; if (buf[len - 1] == '\n') len--; for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && len == strlen(gid_type_str[i])) { err = i; break; } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak110100.00%1100.00%
Total110100.00%1100.00%

EXPORT_SYMBOL(ib_cache_gid_parse_type_str); /* This function expects that rwlock will be write locked in all * scenarios and that lock will be locked in sleep-able (RoCE) * scenarios. */
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) __releases(&table->rwlock

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak2764.29%266.67%
Roland Dreier1535.71%133.33%
Total42100.00%3100.00%

) __acquires(&table->rwlock) { int ret = 0; struct net_device *old_net_dev; enum ib_gid_type old_gid_type; /* in rdma_cap_roce_gid_table, this funciton should be protected by a * sleep-able lock. */ if (rdma_cap_roce_gid_table(ib_dev, port)) { table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID; write_unlock_irq(&table->rwlock); /* 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_irq(&table->rwlock); } old_net_dev = table->data_vec[ix].attr.ndev; old_gid_type = table->data_vec[ix].attr.gid_type; 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; } memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid)); memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr)); if (default_gid) { table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT; if (action == GID_TABLE_WRITE_ACTION_DEL) table->data_vec[ix].attr.gid_type = old_gid_type; } 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; 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); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak5087.72%125.00%
Roland Dreier610.53%250.00%
Ira Weiny11.75%125.00%
Total57100.00%4100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak5189.47%133.33%
Roland Dreier610.53%266.67%
Total57100.00%3100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak4493.62%150.00%
Roland Dreier36.38%150.00%
Total47100.00%2100.00%

/* rwlock should be read locked */
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, int *pempty) { int i = 0; int found = -1; int empty = pempty ? -1 : 0; while (i < table->sz && (found < 0 || empty < 0)) { struct ib_gid_table_entry *data = &table->data_vec[i]; struct ib_gid_attr *attr = &data->attr; int curr_index = i; i++; if (data->props & GID_TABLE_ENTRY_INVALID) continue; if (empty < 0) if (!memcmp(&data->gid, &zgid, sizeof(*gid)) && !memcmp(attr, &zattr, sizeof(*attr)) && !data->props) empty = curr_index; if (found >= 0) continue; if (mask & GID_ATTR_FIND_MASK_GID_TYPE && attr->gid_type != val->gid_type) continue; if (mask & GID_ATTR_FIND_MASK_GID && memcmp(gid, &data->gid, sizeof(*gid))) continue; if (mask & GID_ATTR_FIND_MASK_NETDEV && attr->ndev != val->ndev) continue; if (mask & GID_ATTR_FIND_MASK_DEFAULT && !!(data->props & GID_TABLE_ENTRY_DEFAULT) != default_gid) continue; found = curr_index; } if (pempty) *pempty = empty; return found; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak260100.00%4100.00%
Total260100.00%4100.00%


static void make_default_gid(struct net_device *dev, union ib_gid *gid) { gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); addrconf_ifid_eui48(&gid->raw[8], dev); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak40100.00%1100.00%
Total40100.00%1100.00%


int ib_cache_gid_add(struct ib_device *ib_dev, u8 port, union ib_gid *gid, struct ib_gid_attr *attr) { struct ib_gid_table *table; int ix; int ret = 0; struct net_device *idev; int empty; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; if (!memcmp(gid, &zgid, sizeof(*gid))) return -EINVAL; if (ib_dev->get_netdev) { idev = ib_dev->get_netdev(ib_dev, port); if (idev && attr->ndev != idev) { union ib_gid default_gid; /* 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); } mutex_lock(&table->lock); write_lock_irq(&table->rwlock); ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE | GID_ATTR_FIND_MASK_NETDEV, &empty); if (ix >= 0) goto out_unlock; if (empty < 0) { ret = -ENOSPC; goto out_unlock; } ret = add_gid(ib_dev, port, table, empty, gid, attr, false); if (!ret) dispatch_gid_change_event(ib_dev, port); out_unlock: write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak27297.49%480.00%
Jack Wang72.51%120.00%
Total279100.00%5100.00%


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 *table; int ix; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; mutex_lock(&table->lock); write_lock_irq(&table->rwlock); ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE | GID_ATTR_FIND_MASK_NETDEV | GID_ATTR_FIND_MASK_DEFAULT, NULL); if (ix < 0) goto out_unlock; if (!del_gid(ib_dev, port, table, ix, false)) dispatch_gid_change_event(ib_dev, port); out_unlock: write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak13495.04%480.00%
Jack Wang74.96%120.00%
Total141100.00%5100.00%


int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port, struct net_device *ndev) { struct ib_gid_table *table; int ix; bool deleted = false; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; mutex_lock(&table->lock); write_lock_irq(&table->rwlock); for (ix = 0; ix < table->sz; ix++) if (table->data_vec[ix].attr.ndev == ndev) if (!del_gid(ib_dev, port, table, ix, !!(table->data_vec[ix].props & GID_TABLE_ENTRY_DEFAULT))) deleted = true; write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); if (deleted) dispatch_gid_change_event(ib_dev, port); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak13786.71%250.00%
Talat Batheesh148.86%125.00%
Jack Wang74.43%125.00%
Total158100.00%4100.00%


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 *table; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; if (index < 0 || index >= table->sz) return -EINVAL; if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) 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); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak14095.24%150.00%
Jack Wang74.76%150.00%
Total147100.00%2100.00%


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 *table; u8 p; int local_index; unsigned long flags; for (p = 0; p < ib_dev->phys_port_cnt; p++) { table = ib_dev->cache.ports[p].gid; read_lock_irqsave(&table->rwlock, flags); local_index = find_gid(table, gid, val, false, mask, NULL); if (local_index >= 0) { if (index) *index = local_index; if (port) *port = p + rdma_start_port(ib_dev); read_unlock_irqrestore(&table->rwlock, flags); return 0; } read_unlock_irqrestore(&table->rwlock, flags); } return -ENOENT; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak15895.76%375.00%
Jack Wang74.24%125.00%
Total165100.00%4100.00%


static int ib_cache_gid_find(struct ib_device *ib_dev, const union ib_gid *gid, enum ib_gid_type gid_type, struct net_device *ndev, u8 *port, u16 *index) { unsigned long mask = GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE; struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type}; if (ndev) mask |= GID_ATTR_FIND_MASK_NETDEV; return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val, mask, port, index); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak83100.00%2100.00%
Total83100.00%2100.00%


int ib_find_cached_gid_by_port(struct ib_device *ib_dev, const union ib_gid *gid, enum ib_gid_type gid_type, u8 port, struct net_device *ndev, u16 *index) { int local_index; struct ib_gid_table *table; unsigned long mask = GID_ATTR_FIND_MASK_GID | GID_ATTR_FIND_MASK_GID_TYPE; struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type}; unsigned long flags; if (!rdma_is_port_valid(ib_dev, port)) return -ENOENT; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; if (ndev) mask |= GID_ATTR_FIND_MASK_NETDEV; read_lock_irqsave(&table->rwlock, flags); local_index = find_gid(table, gid, &val, false, mask, NULL); if (local_index >= 0) { if (index) *index = local_index; read_unlock_irqrestore(&table->rwlock, flags); return 0; } read_unlock_irqrestore(&table->rwlock, flags); return -ENOENT; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak17094.44%571.43%
Jack Wang73.89%114.29%
Yuval Shaia31.67%114.29%
Total180100.00%7100.00%

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 *table; unsigned int i; unsigned long flags; bool found = false; if (!rdma_is_port_valid(ib_dev, port) || !rdma_protocol_roce(ib_dev, port)) return -EPROTONOSUPPORT; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; read_lock_irqsave(&table->rwlock, flags); for (i = 0; i < table->sz; i++) { struct ib_gid_attr attr; 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: if (found) break; } read_unlock_irqrestore(&table->rwlock, flags); if (!found) return -ENOENT; if (index) *index = i; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak24496.06%250.00%
Jack Wang72.76%125.00%
Yuval Shaia31.18%125.00%
Total254100.00%4100.00%


static struct ib_gid_table *alloc_gid_table(int sz) { struct ib_gid_table *table = kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL); if (!table) return NULL; 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; rwlock_init(&table->rwlock); return table; err_free_table: kfree(table); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak99100.00%2100.00%
Total99100.00%2100.00%


static void release_gid_table(struct ib_gid_table *table) { if (table) { kfree(table->data_vec); kfree(table); } }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak29100.00%1100.00%
Total29100.00%1100.00%


static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table) { int i; bool deleted = false; if (!table) return; write_lock_irq(&table->rwlock); for (i = 0; i < table->sz; ++i) { if (memcmp(&table->data_vec[i].gid, &zgid, sizeof(table->data_vec[i].gid))) if (!del_gid(ib_dev, port, table, i, table->data_vec[i].props & GID_ATTR_FIND_MASK_DEFAULT)) deleted = true; } write_unlock_irq(&table->rwlock); if (deleted) dispatch_gid_change_event(ib_dev, port); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak136100.00%2100.00%
Total136100.00%2100.00%


void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port, struct net_device *ndev, unsigned long gid_type_mask, enum ib_cache_gid_default_mode mode) { union ib_gid gid; struct ib_gid_attr gid_attr; struct ib_gid_attr zattr_type = zattr; struct ib_gid_table *table; unsigned int gid_type; table = ib_dev->cache.ports[port - rdma_start_port(ib_dev)].gid; make_default_gid(ndev, &gid); memset(&gid_attr, 0, sizeof(gid_attr)); gid_attr.ndev = ndev; for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) { int ix; union ib_gid current_gid; struct ib_gid_attr current_gid_attr = {}; if (1UL << gid_type & ~gid_type_mask) continue; gid_attr.gid_type = gid_type; mutex_lock(&table->lock); write_lock_irq(&table->rwlock); ix = find_gid(table, NULL, &gid_attr, true, GID_ATTR_FIND_MASK_GID_TYPE | GID_ATTR_FIND_MASK_DEFAULT, NULL); /* Coudn't find default GID location */ if (WARN_ON(ix < 0)) goto release; zattr_type.gid_type = gid_type; if (!__ib_cache_gid_get(ib_dev, port, ix, &current_gid, &current_gid_attr) && mode == IB_CACHE_GID_DEFAULT_MODE_SET && !memcmp(&gid, &current_gid, sizeof(gid)) && !memcmp(&gid_attr, &current_gid_attr, sizeof(gid_attr))) goto release; if (memcmp(&current_gid, &zgid, sizeof(current_gid)) || memcmp(&current_gid_attr, &zattr_type, sizeof(current_gid_attr))) { if (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 release; } else { dispatch_gid_change_event(ib_dev, port); } } 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); else dispatch_gid_change_event(ib_dev, port); } release: if (current_gid_attr.ndev) dev_put(current_gid_attr.ndev); write_unlock_irq(&table->rwlock); mutex_unlock(&table->lock); } }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak37794.72%457.14%
Doron Tsur82.01%114.29%
Jack Wang71.76%114.29%
Doug Ledford61.51%114.29%
Total398100.00%7100.00%


static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port, struct ib_gid_table *table) { unsigned int i; unsigned long roce_gid_type_mask; unsigned int num_default_gids; unsigned int current_gid = 0; roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port); num_default_gids = hweight_long(roce_gid_type_mask); for (i = 0; i < num_default_gids && i < table->sz; i++) { struct ib_gid_table_entry *entry = &table->data_vec[i]; entry->props |= GID_TABLE_ENTRY_DEFAULT; current_gid = find_next_bit(&roce_gid_type_mask, BITS_PER_LONG, current_gid); entry->attr.gid_type = current_gid++; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak11598.29%266.67%
Roland Dreier21.71%133.33%
Total117100.00%3100.00%


static int _gid_table_setup_one(struct ib_device *ib_dev) { u8 port; struct ib_gid_table *table; int err = 0; for (port = 0; port < ib_dev->phys_port_cnt; port++) { u8 rdma_port = port + rdma_start_port(ib_dev); table = alloc_gid_table( ib_dev->port_immutable[rdma_port].gid_tbl_len); if (!table) { err = -ENOMEM; goto rollback_table_setup; } err = gid_table_reserve_default(ib_dev, port + rdma_start_port(ib_dev), table); if (err) goto rollback_table_setup; ib_dev->cache.ports[port].gid = table; } return 0; rollback_table_setup: for (port = 0; port < ib_dev->phys_port_cnt; port++) { table = ib_dev->cache.ports[port].gid; cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), table); release_gid_table(table); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak13578.03%125.00%
Jack Wang2011.56%125.00%
Roland Dreier179.83%125.00%
Ira Weiny10.58%125.00%
Total173100.00%4100.00%


static void gid_table_release_one(struct ib_device *ib_dev) { struct ib_gid_table *table; u8 port; for (port = 0; port < ib_dev->phys_port_cnt; port++) { table = ib_dev->cache.ports[port].gid; release_gid_table(table); ib_dev->cache.ports[port].gid = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak4567.16%133.33%
Jack Wang1725.37%133.33%
Roland Dreier57.46%133.33%
Total67100.00%3100.00%


static void gid_table_cleanup_one(struct ib_device *ib_dev) { struct ib_gid_table *table; u8 port; for (port = 0; port < ib_dev->phys_port_cnt; port++) { table = ib_dev->cache.ports[port].gid; cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev), table); } }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak3860.32%133.33%
Jack Wang1523.81%133.33%
Roland Dreier1015.87%133.33%
Total63100.00%3100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak54100.00%1100.00%
Total54100.00%1100.00%


int ib_get_cached_gid(struct ib_device *device, u8 port_num, int index, union ib_gid *gid, struct ib_gid_attr *gid_attr) { int res; unsigned long flags; struct ib_gid_table *table; if (!rdma_is_port_valid(device, port_num)) return -EINVAL; table = device->cache.ports[port_num - rdma_start_port(device)].gid; read_lock_irqsave(&table->rwlock, flags); res = __ib_cache_gid_get(device, port_num, index, gid, gid_attr); read_unlock_irqrestore(&table->rwlock, flags); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak7771.30%342.86%
Jack Wang1816.67%114.29%
Roland Dreier98.33%114.29%
Yuval Shaia32.78%114.29%
Sean Hefty10.93%114.29%
Total108100.00%7100.00%

EXPORT_SYMBOL(ib_get_cached_gid);
int ib_find_cached_gid(struct ib_device *device, const union ib_gid *gid, enum ib_gid_type gid_type, struct net_device *ndev, u8 *port_num, u16 *index) { return ib_cache_gid_find(device, gid, gid_type, ndev, port_num, index); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak4693.88%375.00%
Roland Dreier36.12%125.00%
Total49100.00%4100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Matan Barak81100.00%1100.00%
Total81100.00%1100.00%

EXPORT_SYMBOL(ib_find_gid_by_filter);
int ib_get_cached_pkey(struct ib_device *device, u8 port_num, int index, u16 *pkey) { struct ib_pkey_cache *cache; unsigned long flags; int ret = 0; if (!rdma_is_port_valid(device, port_num)) return -EINVAL; read_lock_irqsave(&device->cache.lock, flags); cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; if (index < 0 || index >= cache->table_len) ret = -EINVAL; else *pkey = cache->table[index]; read_unlock_irqrestore(&device->cache.lock, flags); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier11494.21%240.00%
Jack Wang32.48%120.00%
Yuval Shaia32.48%120.00%
Ira Weiny10.83%120.00%
Total121100.00%5100.00%

EXPORT_SYMBOL(ib_get_cached_pkey);
int ib_find_cached_pkey(struct ib_device *device, u8 port_num, u16 pkey, u16 *index) { struct ib_pkey_cache *cache; unsigned long flags; int i; int ret = -ENOENT; int partial_ix = -1; if (!rdma_is_port_valid(device, port_num)) return -EINVAL; read_lock_irqsave(&device->cache.lock, flags); cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; *index = -1; for (i = 0; i < cache->table_len; ++i) if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) { if (cache->table[i] & 0x8000) { *index = i; ret = 0; break; } else partial_ix = i; } if (ret && partial_ix >= 0) { *index = partial_ix; ret = 0; } read_unlock_irqrestore(&device->cache.lock, flags); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier14273.96%233.33%
Jack Morgenstein4322.40%116.67%
Yuval Shaia31.56%116.67%
Jack Wang31.56%116.67%
Ira Weiny10.52%116.67%
Total192100.00%6100.00%

EXPORT_SYMBOL(ib_find_cached_pkey);
int ib_find_exact_cached_pkey(struct ib_device *device, u8 port_num, u16 pkey, u16 *index) { struct ib_pkey_cache *cache; unsigned long flags; int i; int ret = -ENOENT; if (!rdma_is_port_valid(device, port_num)) return -EINVAL; read_lock_irqsave(&device->cache.lock, flags); cache = device->cache.ports[port_num - rdma_start_port(device)].pkey; *index = -1; for (i = 0; i < cache->table_len; ++i) if (cache->table[i] == pkey) { *index = i; ret = 0; break; } read_unlock_irqrestore(&device->cache.lock, flags); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jack Morgenstein13495.04%125.00%
Yuval Shaia32.13%125.00%
Jack Wang32.13%125.00%
Ira Weiny10.71%125.00%
Total141100.00%4100.00%

EXPORT_SYMBOL(ib_find_exact_cached_pkey);
int ib_get_cached_lmc(struct ib_device *device, u8 port_num, u8 *lmc) { unsigned long flags; int ret = 0; if (!rdma_is_port_valid(device, port_num)) return -EINVAL; read_lock_irqsave(&device->cache.lock, flags); *lmc = device->cache.ports[port_num - rdma_start_port(device)].lmc; read_unlock_irqrestore(&device->cache.lock, flags); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jack Morgenstein7991.86%125.00%
Yuval Shaia33.49%125.00%
Jack Wang33.49%125.00%
Ira Weiny11.16%125.00%
Total86100.00%4100.00%

EXPORT_SYMBOL(ib_get_cached_lmc);
int ib_get_cached_port_state(struct ib_device *device, u8 port_num, enum ib_port_state *port_state) { unsigned long flags; int ret = 0; if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) return -EINVAL; read_lock_irqsave(&device->cache.lock, flags); *port_state = device->cache.ports[port_num - rdma_start_port(device)].port_state; read_unlock_irqrestore(&device->cache.lock, flags); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jack Wang93100.00%2100.00%
Total93100.00%2100.00%

EXPORT_SYMBOL(ib_get_cached_port_state);
static void ib_cache_update(struct ib_device *device, u8 port) { struct ib_port_attr *tprops = NULL; struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_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; bool use_roce_gid_table = rdma_cap_roce_gid_table(device, port); if (!rdma_is_port_valid(device, port)) return; table = device->cache.ports[port - rdma_start_port(device)].gid; tprops = kmalloc(sizeof *tprops, GFP_KERNEL); if (!tprops) return; ret = ib_query_port(device, port, tprops); if (ret) { pr_warn("ib_query_port failed (%d) for %s\n", ret, device->name); goto err; } pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len * sizeof *pkey_cache->table, GFP_KERNEL); if (!pkey_cache) goto err; pkey_cache->table_len = tprops->pkey_tbl_len; 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; } for (i = 0; i < pkey_cache->table_len; ++i) { ret = ib_query_pkey(device, port, i, pkey_cache->table + i); if (ret) { pr_warn("ib_query_pkey 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) { pr_warn("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.ports[port - rdma_start_port(device)].pkey; device->cache.ports[port - rdma_start_port(device)].pkey = pkey_cache; if (!use_roce_gid_table) { write_lock(&table->rwlock); for (i = 0; i < gid_cache->table_len; i++) { modify_gid(device, port, table, i, gid_cache->table + i, &zattr, false); } write_unlock(&table->rwlock); } device->cache.ports[port - rdma_start_port(device)].lmc = tprops->lmc; device->cache.ports[port - rdma_start_port(device)].port_state = tprops->state; write_unlock_irq(&device->cache.lock); kfree(gid_cache); kfree(old_pkey_cache); kfree(tprops); return; err: kfree(pkey_cache); kfree(gid_cache); kfree(tprops); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier35565.14%110.00%
Matan Barak12923.67%330.00%
Jack Wang366.61%220.00%
Jack Morgenstein162.94%110.00%
Parav Pandit30.55%110.00%
Ira Weiny30.55%110.00%
Yuval Shaia30.55%110.00%
Total545100.00%10100.00%


static void ib_cache_task(struct work_struct *_work) { struct ib_update_work *work = container_of(_work, struct ib_update_work, work); ib_cache_update(work->device, work->port_num); kfree(work); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier3071.43%150.00%
David Howells1228.57%150.00%
Total42100.00%2100.00%


static void ib_cache_event(struct ib_event_handler *handler, struct ib_event *event) { struct ib_update_work *work; if (event->event == IB_EVENT_PORT_ERR || event->event == IB_EVENT_PORT_ACTIVE || event->event == IB_EVENT_LID_CHANGE || event->event == IB_EVENT_PKEY_CHANGE || event->event == IB_EVENT_SM_CHANGE || event->event == IB_EVENT_CLIENT_REREGISTER || event->event == IB_EVENT_GID_CHANGE) { work = kmalloc(sizeof *work, GFP_ATOMIC); if (work) { INIT_WORK(&work->work, ib_cache_task); work->device = event->device; work->port_num = event->element.port_num; queue_work(ib_wq, &work->work); } } }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier10787.70%125.00%
Jack Morgenstein64.92%125.00%
Or Gerlitz64.92%125.00%
Tejun Heo32.46%125.00%
Total122100.00%4100.00%


int ib_cache_setup_one(struct ib_device *device) { int p; int err; rwlock_init(&device->cache.lock); device->cache.ports = kzalloc(sizeof(*device->cache.ports) * (rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL); if (!device->cache.ports) { err = -ENOMEM; goto out; } err = gid_table_setup_one(device); if (err) goto out; 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); err = ib_register_event_handler(&device->cache.event_handler); if (err) goto err; return 0; err: gid_table_cleanup_one(device); out: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier9654.86%112.50%
Matan Barak3721.14%112.50%
Jack Wang2916.57%225.00%
Leon Romanovsky84.57%112.50%
Ira Weiny31.71%112.50%
Jason Gunthorpe10.57%112.50%
Jack Morgenstein10.57%112.50%
Total175100.00%8100.00%


void ib_cache_release_one(struct ib_device *device) { int 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. */ for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p) kfree(device->cache.ports[p].pkey); gid_table_release_one(device); kfree(device->cache.ports); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier3453.97%116.67%
Matan Barak1320.63%116.67%
Jack Wang1219.05%233.33%
Jack Morgenstein23.17%116.67%
Ira Weiny23.17%116.67%
Total63100.00%6100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier2167.74%125.00%
Jack Morgenstein412.90%125.00%
Tejun Heo412.90%125.00%
Matan Barak26.45%125.00%
Total31100.00%4100.00%


void __init ib_cache_setup(void) { roce_gid_mgmt_init(); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier763.64%150.00%
Matan Barak436.36%150.00%
Total11100.00%2100.00%


void __exit ib_cache_cleanup(void) { roce_gid_mgmt_cleanup(); }

Contributors

PersonTokensPropCommitsCommitProp
Roland Dreier981.82%150.00%
Matan Barak218.18%150.00%
Total11100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Matan Barak383167.27%1128.21%
Roland Dreier108919.12%410.26%
Jack Wang3135.50%37.69%
Jack Morgenstein2955.18%410.26%
Aviv Heller530.93%12.56%
Yuval Shaia240.42%12.56%
Ira Weiny140.25%25.13%
Talat Batheesh140.25%12.56%
David Howells120.21%12.56%
Leon Romanovsky80.14%12.56%
Doron Tsur80.14%12.56%
Tejun Heo70.12%12.56%
Or Gerlitz60.11%12.56%
Doug Ledford60.11%12.56%
Moni Shoua50.09%12.56%
Parav Pandit30.05%12.56%
Alexey Dobriyan30.05%12.56%
Tom Duffy20.04%12.56%
Jason Gunthorpe10.02%12.56%
Sean Hefty10.02%12.56%
Total5695100.00%39100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.