summaryrefslogtreecommitdiff
path: root/drivers/net/cxgb4/cxgb4_uld.h
blob: b1d39b8d141af94d343a19689459d1914628d7f9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
 * This file is part of the Chelsio T4 Ethernet driver for Linux.
 *
 * Copyright (c) 2003-2010 Chelsio Communications, 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 __CXGB4_OFLD_H
#define __CXGB4_OFLD_H

#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/atomic.h>

/* 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   /* control messages */
};

#define INIT_TP_WR(w, tid) do { \
	(w)->wr.wr_hi = htonl(FW_WR_OP(FW_TP_WR) | \
			      FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \
	(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) | \
			       FW_WR_FLOWID(tid)); \
	(w)->wr.wr_lo = cpu_to_be64(0); \
} while (0)

#define INIT_TP_WR_CPL(w, cpl, tid) do { \
	INIT_TP_WR(w, tid); \
	OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
} while (0)

#define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \
	(w)->wr.wr_hi = htonl(FW_WR_OP(FW_ULPTX_WR) | FW_WR_ATOMIC(atomic)); \
	(w)->wr.wr_mid = htonl(FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) | \
			       FW_WR_FLOWID(tid)); \
	(w)->wr.wr_lo = cpu_to_be64(0); \
} while (0)

/* Special asynchronous notification message */
#define CXGB4_MSG_AN ((void *)1)

struct serv_entry {
	void *data;
};

union aopen_entry {
	void *data;
	union aopen_entry *next;
};

/*
 * Holds the size, base address, free list start, etc of the TID, server TID,
 * and active-open TID tables.  The tables themselves are allocated dynamically.
 */
struct tid_info {
	void **tid_tab;
	unsigned int ntids;

	struct serv_entry *stid_tab;
	unsigned long *stid_bmap;
	unsigned int nstids;
	unsigned int stid_base;

	union aopen_entry *atid_tab;
	unsigned int natids;

	unsigned int nftids;
	unsigned int ftid_base;

	spinlock_t atid_lock ____cacheline_aligned_in_smp;
	union aopen_entry *afree;
	unsigned int atids_in_use;

	spinlock_t stid_lock;
	unsigned int stids_in_use;

	atomic_t tids_in_use;
};

static inline void *lookup_tid(const struct tid_info *t, unsigned int tid)
{
	return tid < t->ntids ? t->tid_tab[tid] : NULL;
}

static inline void *lookup_atid(const struct tid_info *t, unsigned int atid)
{
	return atid < t->natids ? t->atid_tab[atid].data : NULL;
}

static inline void *lookup_stid(const struct tid_info *t, unsigned int stid)
{
	stid -= t->stid_base;
	return stid < t->nstids ? t->stid_tab[stid].data : NULL;
}

static inline void cxgb4_insert_tid(struct tid_info *t, void *data,
				    unsigned int tid)
{
	t->tid_tab[tid] = data;
	atomic_inc(&t->tids_in_use);
}

int cxgb4_alloc_atid(struct tid_info *t, void *data);
int cxgb4_alloc_stid(struct tid_info *t, int family, void *data);
void cxgb4_free_atid(struct tid_info *t, unsigned int atid);
void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family);
void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid);

struct in6_addr;

int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
			__be32 sip, __be16 sport, unsigned int queue);

static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
{
	skb_set_queue_mapping(skb, (queue << 1) | prio);
}

enum cxgb4_uld {
	CXGB4_ULD_RDMA,
	CXGB4_ULD_ISCSI,
	CXGB4_ULD_MAX
};

enum cxgb4_state {
	CXGB4_STATE_UP,
	CXGB4_STATE_START_RECOVERY,
	CXGB4_STATE_DOWN,
	CXGB4_STATE_DETACH
};

struct pci_dev;
struct l2t_data;
struct net_device;
struct pkt_gl;
struct tp_tcp_stats;

struct cxgb4_range {
	unsigned int start;
	unsigned int size;
};

struct cxgb4_virt_res {                      /* virtualized HW resources */
	struct cxgb4_range ddp;
	struct cxgb4_range iscsi;
	struct cxgb4_range stag;
	struct cxgb4_range rq;
	struct cxgb4_range pbl;
	struct cxgb4_range qp;
	struct cxgb4_range cq;
	struct cxgb4_range ocq;
};

#define OCQ_WIN_OFFSET(pdev, vres) \
	(pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size))

/*
 * Block of information the LLD provides to ULDs attaching to a device.
 */
struct cxgb4_lld_info {
	struct pci_dev *pdev;                /* associated PCI device */
	struct l2t_data *l2t;                /* L2 table */
	struct tid_info *tids;               /* TID table */
	struct net_device **ports;           /* device ports */
	const struct cxgb4_virt_res *vr;     /* assorted HW resources */
	const unsigned short *mtus;          /* MTU table */
	const unsigned short *rxq_ids;       /* the ULD's Rx queue ids */
	unsigned short nrxq;                 /* # of Rx queues */
	unsigned short ntxq;                 /* # of Tx queues */
	unsigned char nchan:4;               /* # of channels */
	unsigned char nports:4;              /* # of ports */
	unsigned char wr_cred;               /* WR 16-byte credits */
	unsigned char adapter_type;          /* type of adapter */
	unsigned char fw_api_ver;            /* FW API version */
	unsigned int fw_vers;                /* FW version */
	unsigned int iscsi_iolen;            /* iSCSI max I/O length */
	unsigned short udb_density;          /* # of user DB/page */
	unsigned short ucq_density;          /* # of user CQs/page */
	void __iomem *gts_reg;               /* address of GTS register */
	void __iomem *db_reg;                /* address of kernel doorbell */
};

struct cxgb4_uld_info {
	const char *name;
	void *(*add)(const struct cxgb4_lld_info *p);
	int (*rx_handler)(void *handle, const __be64 *rsp,
			  const struct pkt_gl *gl);
	int (*state_change)(void *handle, enum cxgb4_state new_state);
};

int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);
int cxgb4_unregister_uld(enum cxgb4_uld type);
int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb);
unsigned int cxgb4_port_chan(const struct net_device *dev);
unsigned int cxgb4_port_viid(const struct net_device *dev);
unsigned int cxgb4_port_idx(const struct net_device *dev);
unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
			    unsigned int *idx);
void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
			 struct tp_tcp_stats *v6);
void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
		      const unsigned int *pgsz_order);
struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl,
				   unsigned int skb_len, unsigned int pull_len);
#endif  /* !__CXGB4_OFLD_H */