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
|
/**
* Copyright (C) 2005 - 2013 Emulex
* All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation. The full GNU General
* Public License is included in this distribution in the file called COPYING.
*
* Contact Information:
* linux-drivers@emulex.com
*
* Emulex
* 3333 Susan Street
* Costa Mesa, CA 92626
*/
#ifndef BEISCSI_H
#define BEISCSI_H
#include <linux/pci.h>
#include <linux/if_vlan.h>
#include <linux/blk-iopoll.h>
#define FW_VER_LEN 32
#define MCC_Q_LEN 128
#define MCC_CQ_LEN 256
#define MAX_MCC_CMD 16
/* BladeEngine Generation numbers */
#define BE_GEN2 2
#define BE_GEN3 3
#define BE_GEN4 4
struct be_dma_mem {
void *va;
dma_addr_t dma;
u32 size;
};
struct be_queue_info {
struct be_dma_mem dma_mem;
u16 len;
u16 entry_size; /* Size of an element in the queue */
u16 id;
u16 tail, head;
bool created;
atomic_t used; /* Number of valid elements in the queue */
};
static inline u32 MODULO(u16 val, u16 limit)
{
WARN_ON(limit & (limit - 1));
return val & (limit - 1);
}
static inline void index_inc(u16 *index, u16 limit)
{
*index = MODULO((*index + 1), limit);
}
static inline void *queue_head_node(struct be_queue_info *q)
{
return q->dma_mem.va + q->head * q->entry_size;
}
static inline void *queue_get_wrb(struct be_queue_info *q, unsigned int wrb_num)
{
return q->dma_mem.va + wrb_num * q->entry_size;
}
static inline void *queue_tail_node(struct be_queue_info *q)
{
return q->dma_mem.va + q->tail * q->entry_size;
}
static inline void queue_head_inc(struct be_queue_info *q)
{
index_inc(&q->head, q->len);
}
static inline void queue_tail_inc(struct be_queue_info *q)
{
index_inc(&q->tail, q->len);
}
/*ISCSI */
struct be_eq_obj {
bool todo_mcc_cq;
bool todo_cq;
struct be_queue_info q;
struct beiscsi_hba *phba;
struct be_queue_info *cq;
struct work_struct work_cqs; /* Work Item */
struct blk_iopoll iopoll;
};
struct be_mcc_obj {
struct be_queue_info q;
struct be_queue_info cq;
};
struct be_ctrl_info {
u8 __iomem *csr;
u8 __iomem *db; /* Door Bell */
u8 __iomem *pcicfg; /* PCI config space */
struct pci_dev *pdev;
/* Mbox used for cmd request/response */
spinlock_t mbox_lock; /* For serializing mbox cmds to BE card */
struct be_dma_mem mbox_mem;
/* Mbox mem is adjusted to align to 16 bytes. The allocated addr
* is stored for freeing purpose */
struct be_dma_mem mbox_mem_alloced;
/* MCC Rings */
struct be_mcc_obj mcc_obj;
spinlock_t mcc_lock; /* For serializing mcc cmds to BE card */
spinlock_t mcc_cq_lock;
wait_queue_head_t mcc_wait[MAX_MCC_CMD + 1];
unsigned int mcc_tag[MAX_MCC_CMD];
unsigned int mcc_numtag[MAX_MCC_CMD + 1];
unsigned short mcc_alloc_index;
unsigned short mcc_free_index;
unsigned int mcc_tag_available;
};
#include "be_cmds.h"
#define PAGE_SHIFT_4K 12
#define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K)
#define mcc_timeout 120000 /* 12s timeout */
/* Returns number of pages spanned by the data starting at the given addr */
#define PAGES_4K_SPANNED(_address, size) \
((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) + \
(size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
/* Returns bit offset within a DWORD of a bitfield */
#define AMAP_BIT_OFFSET(_struct, field) \
(((size_t)&(((_struct *)0)->field))%32)
/* Returns the bit mask of the field that is NOT shifted into location. */
static inline u32 amap_mask(u32 bitsize)
{
return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
}
static inline void amap_set(void *ptr, u32 dw_offset, u32 mask,
u32 offset, u32 value)
{
u32 *dw = (u32 *) ptr + dw_offset;
*dw &= ~(mask << offset);
*dw |= (mask & value) << offset;
}
#define AMAP_SET_BITS(_struct, field, ptr, val) \
amap_set(ptr, \
offsetof(_struct, field)/32, \
amap_mask(sizeof(((_struct *)0)->field)), \
AMAP_BIT_OFFSET(_struct, field), \
val)
static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
{
u32 *dw = ptr;
return mask & (*(dw + dw_offset) >> offset);
}
#define AMAP_GET_BITS(_struct, field, ptr) \
amap_get(ptr, \
offsetof(_struct, field)/32, \
amap_mask(sizeof(((_struct *)0)->field)), \
AMAP_BIT_OFFSET(_struct, field))
#define be_dws_cpu_to_le(wrb, len) swap_dws(wrb, len)
#define be_dws_le_to_cpu(wrb, len) swap_dws(wrb, len)
static inline void swap_dws(void *wrb, int len)
{
#ifdef __BIG_ENDIAN
u32 *dw = wrb;
WARN_ON(len % 4);
do {
*dw = cpu_to_le32(*dw);
dw++;
len -= 4;
} while (len);
#endif /* __BIG_ENDIAN */
}
#endif /* BEISCSI_H */
|
