1219820Sjeff/* 2219820Sjeff * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. 3272407Shselasky * Copyright (c) 2007, 2008, 2014 Mellanox Technologies. All rights reserved. 4219820Sjeff * 5219820Sjeff * This software is available to you under a choice of one of two 6219820Sjeff * licenses. You may choose to be licensed under the terms of the GNU 7219820Sjeff * General Public License (GPL) Version 2, available from the file 8219820Sjeff * COPYING in the main directory of this source tree, or the 9219820Sjeff * OpenIB.org BSD license below: 10219820Sjeff * 11219820Sjeff * Redistribution and use in source and binary forms, with or 12219820Sjeff * without modification, are permitted provided that the following 13219820Sjeff * conditions are met: 14219820Sjeff * 15219820Sjeff * - Redistributions of source code must retain the above 16219820Sjeff * copyright notice, this list of conditions and the following 17219820Sjeff * disclaimer. 18219820Sjeff * 19219820Sjeff * - Redistributions in binary form must reproduce the above 20219820Sjeff * copyright notice, this list of conditions and the following 21219820Sjeff * disclaimer in the documentation and/or other materials 22219820Sjeff * provided with the distribution. 23219820Sjeff * 24219820Sjeff * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25219820Sjeff * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26219820Sjeff * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27219820Sjeff * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28219820Sjeff * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29219820Sjeff * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30219820Sjeff * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31219820Sjeff * SOFTWARE. 32219820Sjeff */ 33219820Sjeff 34255932Salfred#include <linux/slab.h> 35272407Shselasky#include <linux/module.h> 36255932Salfred 37219820Sjeff#include "mlx4.h" 38219820Sjeff 39219820Sjeffstruct mlx4_device_context { 40219820Sjeff struct list_head list; 41219820Sjeff struct mlx4_interface *intf; 42219820Sjeff void *context; 43219820Sjeff}; 44219820Sjeff 45219820Sjeffstatic LIST_HEAD(intf_list); 46219820Sjeffstatic LIST_HEAD(dev_list); 47219820Sjeffstatic DEFINE_MUTEX(intf_mutex); 48219820Sjeff 49219820Sjeffstatic void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 50219820Sjeff{ 51219820Sjeff struct mlx4_device_context *dev_ctx; 52219820Sjeff 53219820Sjeff dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL); 54219820Sjeff if (!dev_ctx) 55219820Sjeff return; 56219820Sjeff 57219820Sjeff dev_ctx->intf = intf; 58219820Sjeff dev_ctx->context = intf->add(&priv->dev); 59219820Sjeff 60219820Sjeff if (dev_ctx->context) { 61219820Sjeff spin_lock_irq(&priv->ctx_lock); 62219820Sjeff list_add_tail(&dev_ctx->list, &priv->ctx_list); 63219820Sjeff spin_unlock_irq(&priv->ctx_lock); 64219820Sjeff } else 65219820Sjeff kfree(dev_ctx); 66219820Sjeff} 67219820Sjeff 68219820Sjeffstatic void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 69219820Sjeff{ 70219820Sjeff struct mlx4_device_context *dev_ctx; 71219820Sjeff 72219820Sjeff list_for_each_entry(dev_ctx, &priv->ctx_list, list) 73219820Sjeff if (dev_ctx->intf == intf) { 74219820Sjeff spin_lock_irq(&priv->ctx_lock); 75219820Sjeff list_del(&dev_ctx->list); 76219820Sjeff spin_unlock_irq(&priv->ctx_lock); 77219820Sjeff 78219820Sjeff intf->remove(&priv->dev, dev_ctx->context); 79219820Sjeff kfree(dev_ctx); 80219820Sjeff return; 81219820Sjeff } 82219820Sjeff} 83219820Sjeff 84219820Sjeffint mlx4_register_interface(struct mlx4_interface *intf) 85219820Sjeff{ 86219820Sjeff struct mlx4_priv *priv; 87219820Sjeff 88219820Sjeff if (!intf->add || !intf->remove) 89219820Sjeff return -EINVAL; 90219820Sjeff 91219820Sjeff mutex_lock(&intf_mutex); 92219820Sjeff 93219820Sjeff list_add_tail(&intf->list, &intf_list); 94219820Sjeff list_for_each_entry(priv, &dev_list, dev_list) 95219820Sjeff mlx4_add_device(intf, priv); 96219820Sjeff 97219820Sjeff mutex_unlock(&intf_mutex); 98219820Sjeff 99219820Sjeff return 0; 100219820Sjeff} 101219820SjeffEXPORT_SYMBOL_GPL(mlx4_register_interface); 102219820Sjeff 103219820Sjeffvoid mlx4_unregister_interface(struct mlx4_interface *intf) 104219820Sjeff{ 105219820Sjeff struct mlx4_priv *priv; 106219820Sjeff 107219820Sjeff mutex_lock(&intf_mutex); 108219820Sjeff 109219820Sjeff list_for_each_entry(priv, &dev_list, dev_list) 110219820Sjeff mlx4_remove_device(intf, priv); 111219820Sjeff 112219820Sjeff list_del(&intf->list); 113219820Sjeff 114219820Sjeff mutex_unlock(&intf_mutex); 115219820Sjeff} 116219820SjeffEXPORT_SYMBOL_GPL(mlx4_unregister_interface); 117219820Sjeff 118255932Salfredvoid mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, 119255932Salfred unsigned long param) 120219820Sjeff{ 121219820Sjeff struct mlx4_priv *priv = mlx4_priv(dev); 122219820Sjeff struct mlx4_device_context *dev_ctx; 123219820Sjeff unsigned long flags; 124219820Sjeff 125219820Sjeff spin_lock_irqsave(&priv->ctx_lock, flags); 126219820Sjeff 127219820Sjeff list_for_each_entry(dev_ctx, &priv->ctx_list, list) 128219820Sjeff if (dev_ctx->intf->event) 129255932Salfred dev_ctx->intf->event(dev, dev_ctx->context, type, param); 130219820Sjeff 131219820Sjeff spin_unlock_irqrestore(&priv->ctx_lock, flags); 132219820Sjeff} 133219820Sjeff 134219820Sjeffint mlx4_register_device(struct mlx4_dev *dev) 135219820Sjeff{ 136219820Sjeff struct mlx4_priv *priv = mlx4_priv(dev); 137219820Sjeff struct mlx4_interface *intf; 138219820Sjeff 139219820Sjeff mutex_lock(&intf_mutex); 140219820Sjeff 141219820Sjeff list_add_tail(&priv->dev_list, &dev_list); 142219820Sjeff list_for_each_entry(intf, &intf_list, list) 143219820Sjeff mlx4_add_device(intf, priv); 144219820Sjeff 145219820Sjeff mutex_unlock(&intf_mutex); 146255932Salfred if (!mlx4_is_slave(dev)) 147255932Salfred mlx4_start_catas_poll(dev); 148219820Sjeff 149219820Sjeff return 0; 150219820Sjeff} 151219820Sjeff 152219820Sjeffvoid mlx4_unregister_device(struct mlx4_dev *dev) 153219820Sjeff{ 154219820Sjeff struct mlx4_priv *priv = mlx4_priv(dev); 155219820Sjeff struct mlx4_interface *intf; 156219820Sjeff 157255932Salfred if (!mlx4_is_slave(dev)) 158255932Salfred mlx4_stop_catas_poll(dev); 159219820Sjeff mutex_lock(&intf_mutex); 160219820Sjeff 161219820Sjeff list_for_each_entry(intf, &intf_list, list) 162219820Sjeff mlx4_remove_device(intf, priv); 163219820Sjeff 164272407Shselasky list_del_init(&priv->dev_list); 165219820Sjeff 166219820Sjeff mutex_unlock(&intf_mutex); 167219820Sjeff} 168219820Sjeff 169255932Salfredvoid *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port) 170219820Sjeff{ 171219820Sjeff struct mlx4_priv *priv = mlx4_priv(dev); 172219820Sjeff struct mlx4_device_context *dev_ctx; 173219820Sjeff unsigned long flags; 174219820Sjeff void *result = NULL; 175219820Sjeff 176219820Sjeff spin_lock_irqsave(&priv->ctx_lock, flags); 177219820Sjeff 178219820Sjeff list_for_each_entry(dev_ctx, &priv->ctx_list, list) 179255932Salfred if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) { 180255932Salfred result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port); 181219820Sjeff break; 182255932Salfred } 183219820Sjeff 184219820Sjeff spin_unlock_irqrestore(&priv->ctx_lock, flags); 185219820Sjeff 186219820Sjeff return result; 187219820Sjeff} 188255932SalfredEXPORT_SYMBOL_GPL(mlx4_get_protocol_dev); 189