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625ba2c2 DM |
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> | |
60063497 | 41 | #include <linux/atomic.h> |
625ba2c2 DM |
42 | |
43 | /* CPL message priority levels */ | |
44 | enum { | |
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 | ||
76 | struct serv_entry { | |
77 | void *data; | |
78 | }; | |
79 | ||
80 | union 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 | */ | |
89 | struct 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 | ||
114 | static 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 | ||
119 | static 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 | ||
124 | static 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 | ||
130 | static 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 | ||
137 | int cxgb4_alloc_atid(struct tid_info *t, void *data); | |
138 | int cxgb4_alloc_stid(struct tid_info *t, int family, void *data); | |
139 | void cxgb4_free_atid(struct tid_info *t, unsigned int atid); | |
140 | void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family); | |
141 | void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid); | |
625ba2c2 DM |
142 | |
143 | struct in6_addr; | |
144 | ||
145 | int cxgb4_create_server(const struct net_device *dev, unsigned int stid, | |
146 | __be32 sip, __be16 sport, unsigned int queue); | |
625ba2c2 DM |
147 | |
148 | static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue) | |
149 | { | |
150 | skb_set_queue_mapping(skb, (queue << 1) | prio); | |
151 | } | |
152 | ||
153 | enum cxgb4_uld { | |
154 | CXGB4_ULD_RDMA, | |
155 | CXGB4_ULD_ISCSI, | |
156 | CXGB4_ULD_MAX | |
157 | }; | |
158 | ||
159 | enum cxgb4_state { | |
160 | CXGB4_STATE_UP, | |
161 | CXGB4_STATE_START_RECOVERY, | |
162 | CXGB4_STATE_DOWN, | |
163 | CXGB4_STATE_DETACH | |
164 | }; | |
165 | ||
166 | struct pci_dev; | |
167 | struct l2t_data; | |
168 | struct net_device; | |
169 | struct pkt_gl; | |
170 | struct tp_tcp_stats; | |
171 | ||
172 | struct cxgb4_range { | |
173 | unsigned int start; | |
174 | unsigned int size; | |
175 | }; | |
176 | ||
177 | struct cxgb4_virt_res { /* virtualized HW resources */ | |
178 | struct cxgb4_range ddp; | |
179 | struct cxgb4_range iscsi; | |
180 | struct cxgb4_range stag; | |
181 | struct cxgb4_range rq; | |
182 | struct cxgb4_range pbl; | |
a0881cab DM |
183 | struct cxgb4_range qp; |
184 | struct cxgb4_range cq; | |
1ae970e0 | 185 | struct cxgb4_range ocq; |
625ba2c2 DM |
186 | }; |
187 | ||
1ae970e0 DM |
188 | #define OCQ_WIN_OFFSET(pdev, vres) \ |
189 | (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size)) | |
190 | ||
625ba2c2 DM |
191 | /* |
192 | * Block of information the LLD provides to ULDs attaching to a device. | |
193 | */ | |
194 | struct cxgb4_lld_info { | |
195 | struct pci_dev *pdev; /* associated PCI device */ | |
196 | struct l2t_data *l2t; /* L2 table */ | |
197 | struct tid_info *tids; /* TID table */ | |
198 | struct net_device **ports; /* device ports */ | |
199 | const struct cxgb4_virt_res *vr; /* assorted HW resources */ | |
200 | const unsigned short *mtus; /* MTU table */ | |
201 | const unsigned short *rxq_ids; /* the ULD's Rx queue ids */ | |
202 | unsigned short nrxq; /* # of Rx queues */ | |
203 | unsigned short ntxq; /* # of Tx queues */ | |
204 | unsigned char nchan:4; /* # of channels */ | |
205 | unsigned char nports:4; /* # of ports */ | |
206 | unsigned char wr_cred; /* WR 16-byte credits */ | |
207 | unsigned char adapter_type; /* type of adapter */ | |
208 | unsigned char fw_api_ver; /* FW API version */ | |
209 | unsigned int fw_vers; /* FW version */ | |
210 | unsigned int iscsi_iolen; /* iSCSI max I/O length */ | |
211 | unsigned short udb_density; /* # of user DB/page */ | |
212 | unsigned short ucq_density; /* # of user CQs/page */ | |
213 | void __iomem *gts_reg; /* address of GTS register */ | |
214 | void __iomem *db_reg; /* address of kernel doorbell */ | |
215 | }; | |
216 | ||
217 | struct cxgb4_uld_info { | |
218 | const char *name; | |
219 | void *(*add)(const struct cxgb4_lld_info *p); | |
220 | int (*rx_handler)(void *handle, const __be64 *rsp, | |
221 | const struct pkt_gl *gl); | |
222 | int (*state_change)(void *handle, enum cxgb4_state new_state); | |
223 | }; | |
224 | ||
225 | int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p); | |
226 | int cxgb4_unregister_uld(enum cxgb4_uld type); | |
227 | int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb); | |
228 | unsigned int cxgb4_port_chan(const struct net_device *dev); | |
229 | unsigned int cxgb4_port_viid(const struct net_device *dev); | |
230 | unsigned int cxgb4_port_idx(const struct net_device *dev); | |
625ba2c2 DM |
231 | unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu, |
232 | unsigned int *idx); | |
233 | void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4, | |
234 | struct tp_tcp_stats *v6); | |
235 | void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask, | |
236 | const unsigned int *pgsz_order); | |
237 | struct 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 */ |