mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
209 lines
6.2 KiB
209 lines
6.2 KiB
/* |
|
* 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); |
|
void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port); |
|
|
|
typedef int (*cxgb3_cpl_handler_func)(struct t3cdev *dev, |
|
struct sk_buff *skb, void *ctx); |
|
|
|
enum { |
|
OFFLOAD_STATUS_UP, |
|
OFFLOAD_STATUS_DOWN, |
|
OFFLOAD_PORT_DOWN, |
|
OFFLOAD_PORT_UP, |
|
OFFLOAD_DB_FULL, |
|
OFFLOAD_DB_EMPTY, |
|
OFFLOAD_DB_DROP |
|
}; |
|
|
|
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; |
|
void (*event_handler)(struct t3cdev *tdev, u32 event, u32 port); |
|
}; |
|
|
|
/* |
|
* 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; |
|
|
|
struct sk_buff *nofail_skb; |
|
unsigned int release_list_incomplete; |
|
}; |
|
|
|
/* |
|
* t3cdev -> t3c_data accessor |
|
*/ |
|
#define T3C_DATA(dev) (*(struct t3c_data **)&(dev)->l4opt) |
|
|
|
#endif
|
|
|