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-rw-r--r--drivers/net/cxgb4/cxgb4_uld.h239
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diff --git a/drivers/net/cxgb4/cxgb4_uld.h b/drivers/net/cxgb4/cxgb4_uld.h
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1/*
2 * This file is part of the Chelsio T4 Ethernet driver for Linux.
3 *
4 * Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#ifndef __CXGB4_OFLD_H
36#define __CXGB4_OFLD_H
37
38#include <linux/cache.h>
39#include <linux/spinlock.h>
40#include <linux/skbuff.h>
41#include <asm/atomic.h>
42
43/* CPL message priority levels */
44enum {
45 CPL_PRIORITY_DATA = 0, /* data messages */
46 CPL_PRIORITY_SETUP = 1, /* connection setup messages */
47 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */
48 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */
49 CPL_PRIORITY_ACK = 1, /* RX ACK messages */
50 CPL_PRIORITY_CONTROL = 1 /* control messages */
51};
52
53#define INIT_TP_WR(w, tid) do { \
54 (w)->wr.wr_hi = htonl(FW_WR_OP(FW_TP_WR) | \
55 FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \
56 (w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) | \
57 FW_WR_FLOWID(tid)); \
58 (w)->wr.wr_lo = cpu_to_be64(0); \
59} while (0)
60
61#define INIT_TP_WR_CPL(w, cpl, tid) do { \
62 INIT_TP_WR(w, tid); \
63 OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
64} while (0)
65
66#define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \
67 (w)->wr.wr_hi = htonl(FW_WR_OP(FW_ULPTX_WR) | FW_WR_ATOMIC(atomic)); \
68 (w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) | \
69 FW_WR_FLOWID(tid)); \
70 (w)->wr.wr_lo = cpu_to_be64(0); \
71} while (0)
72
73/* Special asynchronous notification message */
74#define CXGB4_MSG_AN ((void *)1)
75
76struct serv_entry {
77 void *data;
78};
79
80union aopen_entry {
81 void *data;
82 union aopen_entry *next;
83};
84
85/*
86 * Holds the size, base address, free list start, etc of the TID, server TID,
87 * and active-open TID tables. The tables themselves are allocated dynamically.
88 */
89struct tid_info {
90 void **tid_tab;
91 unsigned int ntids;
92
93 struct serv_entry *stid_tab;
94 unsigned long *stid_bmap;
95 unsigned int nstids;
96 unsigned int stid_base;
97
98 union aopen_entry *atid_tab;
99 unsigned int natids;
100
101 unsigned int nftids;
102 unsigned int ftid_base;
103
104 spinlock_t atid_lock ____cacheline_aligned_in_smp;
105 union aopen_entry *afree;
106 unsigned int atids_in_use;
107
108 spinlock_t stid_lock;
109 unsigned int stids_in_use;
110
111 atomic_t tids_in_use;
112};
113
114static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
115{
116 return tid < t->ntids ? t->tid_tab[tid] : NULL;
117}
118
119static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
120{
121 return atid < t->natids ? t->atid_tab[atid].data : NULL;
122}
123
124static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
125{
126 stid -= t->stid_base;
127 return stid < t->nstids ? t->stid_tab[stid].data : NULL;
128}
129
130static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
131 unsigned int tid)
132{
133 t->tid_tab[tid] = data;
134 atomic_inc(&t->tids_in_use);
135}
136
137int cxgb4_alloc_atid(struct tid_info *t, void *data);
138int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
139void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
140void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
141void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);
142void cxgb4_queue_tid_release(struct tid_info *t, unsigned int chan,
143 unsigned int tid);
144
145struct in6_addr;
146
147int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
148 __be32 sip, __be16 sport, unsigned int queue);
149int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
150 const struct in6_addr *sip, __be16 sport,
151 unsigned int queue);
152
153static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
154{
155 skb_set_queue_mapping(skb, (queue << 1) | prio);
156}
157
158enum cxgb4_uld {
159 CXGB4_ULD_RDMA,
160 CXGB4_ULD_ISCSI,
161 CXGB4_ULD_MAX
162};
163
164enum cxgb4_state {
165 CXGB4_STATE_UP,
166 CXGB4_STATE_START_RECOVERY,
167 CXGB4_STATE_DOWN,
168 CXGB4_STATE_DETACH
169};
170
171struct pci_dev;
172struct l2t_data;
173struct net_device;
174struct pkt_gl;
175struct tp_tcp_stats;
176
177struct cxgb4_range {
178 unsigned int start;
179 unsigned int size;
180};
181
182struct cxgb4_virt_res { /* virtualized HW resources */
183 struct cxgb4_range ddp;
184 struct cxgb4_range iscsi;
185 struct cxgb4_range stag;
186 struct cxgb4_range rq;
187 struct cxgb4_range pbl;
188};
189
190/*
191 * Block of information the LLD provides to ULDs attaching to a device.
192 */
193struct cxgb4_lld_info {
194 struct pci_dev *pdev; /* associated PCI device */
195 struct l2t_data *l2t; /* L2 table */
196 struct tid_info *tids; /* TID table */
197 struct net_device **ports; /* device ports */
198 const struct cxgb4_virt_res *vr; /* assorted HW resources */
199 const unsigned short *mtus; /* MTU table */
200 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */
201 unsigned short nrxq; /* # of Rx queues */
202 unsigned short ntxq; /* # of Tx queues */
203 unsigned char nchan:4; /* # of channels */
204 unsigned char nports:4; /* # of ports */
205 unsigned char wr_cred; /* WR 16-byte credits */
206 unsigned char adapter_type; /* type of adapter */
207 unsigned char fw_api_ver; /* FW API version */
208 unsigned int fw_vers; /* FW version */
209 unsigned int iscsi_iolen; /* iSCSI max I/O length */
210 unsigned short udb_density; /* # of user DB/page */
211 unsigned short ucq_density; /* # of user CQs/page */
212 void __iomem *gts_reg; /* address of GTS register */
213 void __iomem *db_reg; /* address of kernel doorbell */
214};
215
216struct cxgb4_uld_info {
217 const char *name;
218 void *(*add)(const struct cxgb4_lld_info *p);
219 int (*rx_handler)(void *handle, const __be64 *rsp,
220 const struct pkt_gl *gl);
221 int (*state_change)(void *handle, enum cxgb4_state new_state);
222};
223
224int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
225int cxgb4_unregister_uld(enum cxgb4_uld type);
226int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
227unsigned int cxgb4_port_chan(const struct net_device *dev);
228unsigned int cxgb4_port_viid(const struct net_device *dev);
229unsigned int cxgb4_port_idx(const struct net_device *dev);
230struct net_device *cxgb4_netdev_by_hwid(struct pci_dev *pdev, unsigned int id);
231unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
232 unsigned int *idx);
233void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
234 struct tp_tcp_stats *v6);
235void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
236 const unsigned int *pgsz_order);
237struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
238 unsigned int skb_len, unsigned int pull_len);
239#endif /* !__CXGB4_OFLD_H */
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-05 21:00:19 -0500