/* * Copyright (c) 2006-2008 Chelsio, 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. */ #ifndef _CXGB3_OFFLOAD_H #define _CXGB3_OFFLOAD_H #include <linux/list.h> #include <linux/skbuff.h> #include "l2t.h" #include "t3cdev.h" #include "t3_cpl.h" struct adapter; void cxgb3_offload_init(void); void cxgb3_adapter_ofld(struct adapter *adapter); void cxgb3_adapter_unofld(struct adapter *adapter); int cxgb3_offload_activate(struct adapter *adapter); void cxgb3_offload_deactivate(struct adapter *adapter); void cxgb3_set_dummy_ops(struct t3cdev *dev); struct t3cdev *dev2t3cdev(struct net_device *dev); /* * Client registration. Users of T3 driver must register themselves. * The T3 driver will call the add function of every client for each T3 * adapter activated, passing up the t3cdev ptr. Each client fills out an * array of callback functions to process CPL messages. */ void cxgb3_register_client(struct cxgb3_client *client); void cxgb3_unregister_client(struct cxgb3_client *client); void cxgb3_add_clients(struct t3cdev *tdev); void cxgb3_remove_clients(struct t3cdev *tdev); typedef int (*cxgb3_cpl_handler_func)(struct t3cdev *dev, struct sk_buff *skb, void *ctx); struct cxgb3_client { char *name; void (*add) (struct t3cdev *); void (*remove) (struct t3cdev *); cxgb3_cpl_handler_func *handlers; int (*redirect)(void *ctx, struct dst_entry *old, struct dst_entry *new, struct l2t_entry *l2t); struct list_head client_list; }; /* * TID allocation services. */ int cxgb3_alloc_atid(struct t3cdev *dev, struct cxgb3_client *client, void *ctx); int cxgb3_alloc_stid(struct t3cdev *dev, struct cxgb3_client *client, void *ctx); void *cxgb3_free_atid(struct t3cdev *dev, int atid); void cxgb3_free_stid(struct t3cdev *dev, int stid); void cxgb3_insert_tid(struct t3cdev *dev, struct cxgb3_client *client, void *ctx, unsigned int tid); void cxgb3_queue_tid_release(struct t3cdev *dev, unsigned int tid); void cxgb3_remove_tid(struct t3cdev *dev, void *ctx, unsigned int tid); struct t3c_tid_entry { struct cxgb3_client *client; void *ctx; }; /* CPL message priority levels */ enum { CPL_PRIORITY_DATA = 0, /* data messages */ CPL_PRIORITY_SETUP = 1, /* connection setup messages */ CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */ CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */ CPL_PRIORITY_ACK = 1, /* RX ACK messages */ CPL_PRIORITY_CONTROL = 1 /* offload control messages */ }; /* Flags for return value of CPL message handlers */ enum { CPL_RET_BUF_DONE = 1, /* buffer processing done, buffer may be freed */ CPL_RET_BAD_MSG = 2, /* bad CPL message (e.g., unknown opcode) */ CPL_RET_UNKNOWN_TID = 4 /* unexpected unknown TID */ }; typedef int (*cpl_handler_func)(struct t3cdev *dev, struct sk_buff *skb); /* * Returns a pointer to the first byte of the CPL header in an sk_buff that * contains a CPL message. */ static inline void *cplhdr(struct sk_buff *skb) { return skb->data; } void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h); union listen_entry { struct t3c_tid_entry t3c_tid; union listen_entry *next; }; union active_open_entry { struct t3c_tid_entry t3c_tid; union active_open_entry *next; }; /* * Holds the size, base address, free list start, etc of the TID, server TID, * and active-open TID tables for a offload device. * The tables themselves are allocated dynamically. */ struct tid_info { struct t3c_tid_entry *tid_tab; unsigned int ntids; atomic_t tids_in_use; union listen_entry *stid_tab; unsigned int nstids; unsigned int stid_base; union active_open_entry *atid_tab; unsigned int natids; unsigned int atid_base; /* * The following members are accessed R/W so we put them in their own * cache lines. * * XXX We could combine the atid fields above with the lock here since * atids are use once (unlike other tids). OTOH the above fields are * usually in cache due to tid_tab. */ spinlock_t atid_lock ____cacheline_aligned_in_smp; union active_open_entry *afree; unsigned int atids_in_use; spinlock_t stid_lock ____cacheline_aligned; union listen_entry *sfree; unsigned int stids_in_use; }; struct t3c_data { struct list_head list_node; struct t3cdev *dev; unsigned int tx_max_chunk; /* max payload for TX_DATA */ unsigned int max_wrs; /* max in-flight WRs per connection */ unsigned int nmtus; const unsigned short *mtus; struct tid_info tid_maps; struct t3c_tid_entry *tid_release_list; spinlock_t tid_release_lock; struct work_struct tid_release_task; }; /* * t3cdev -> t3c_data accessor */ #define T3C_DATA(dev) (*(struct t3c_data **)&(dev)->l4opt) #endif