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-rw-r--r--drivers/scsi/be2iscsi/be.h183
1 files changed, 183 insertions, 0 deletions
diff --git a/drivers/scsi/be2iscsi/be.h b/drivers/scsi/be2iscsi/be.h
new file mode 100644
index 000000000000..b36020dcf012
--- /dev/null
+++ b/drivers/scsi/be2iscsi/be.h
@@ -0,0 +1,183 @@
1/**
2 * Copyright (C) 2005 - 2009 ServerEngines
3 * All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation. The full GNU General
8 * Public License is included in this distribution in the file called COPYING.
9 *
10 * Contact Information:
11 * linux-drivers@serverengines.com
12 *
13 * ServerEngines
14 * 209 N. Fair Oaks Ave
15 * Sunnyvale, CA 94085
16 */
17
18#ifndef BEISCSI_H
19#define BEISCSI_H
20
21#include <linux/pci.h>
22#include <linux/if_vlan.h>
23
24#define FW_VER_LEN 32
25
26struct be_dma_mem {
27 void *va;
28 dma_addr_t dma;
29 u32 size;
30};
31
32struct be_queue_info {
33 struct be_dma_mem dma_mem;
34 u16 len;
35 u16 entry_size; /* Size of an element in the queue */
36 u16 id;
37 u16 tail, head;
38 bool created;
39 atomic_t used; /* Number of valid elements in the queue */
40};
41
42static inline u32 MODULO(u16 val, u16 limit)
43{
44 WARN_ON(limit & (limit - 1));
45 return val & (limit - 1);
46}
47
48static inline void index_inc(u16 *index, u16 limit)
49{
50 *index = MODULO((*index + 1), limit);
51}
52
53static inline void *queue_head_node(struct be_queue_info *q)
54{
55 return q->dma_mem.va + q->head * q->entry_size;
56}
57
58static inline void *queue_tail_node(struct be_queue_info *q)
59{
60 return q->dma_mem.va + q->tail * q->entry_size;
61}
62
63static inline void queue_head_inc(struct be_queue_info *q)
64{
65 index_inc(&q->head, q->len);
66}
67
68static inline void queue_tail_inc(struct be_queue_info *q)
69{
70 index_inc(&q->tail, q->len);
71}
72
73/*ISCSI */
74
75struct be_eq_obj {
76 struct be_queue_info q;
77 char desc[32];
78
79 /* Adaptive interrupt coalescing (AIC) info */
80 bool enable_aic;
81 u16 min_eqd; /* in usecs */
82 u16 max_eqd; /* in usecs */
83 u16 cur_eqd; /* in usecs */
84};
85
86struct be_mcc_obj {
87 struct be_queue_info *q;
88 struct be_queue_info *cq;
89};
90
91struct be_ctrl_info {
92 u8 __iomem *csr;
93 u8 __iomem *db; /* Door Bell */
94 u8 __iomem *pcicfg; /* PCI config space */
95 struct pci_dev *pdev;
96
97 /* Mbox used for cmd request/response */
98 spinlock_t mbox_lock; /* For serializing mbox cmds to BE card */
99 struct be_dma_mem mbox_mem;
100 /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
101 * is stored for freeing purpose */
102 struct be_dma_mem mbox_mem_alloced;
103
104 /* MCC Rings */
105 struct be_mcc_obj mcc_obj;
106 spinlock_t mcc_lock; /* For serializing mcc cmds to BE card */
107 spinlock_t mcc_cq_lock;
108
109 /* MCC Async callback */
110 void (*async_cb) (void *adapter, bool link_up);
111 void *adapter_ctxt;
112};
113
114#include "be_cmds.h"
115
116#define PAGE_SHIFT_4K 12
117#define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K)
118
119/* Returns number of pages spanned by the data starting at the given addr */
120#define PAGES_4K_SPANNED(_address, size) \
121 ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) + \
122 (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
123
124/* Byte offset into the page corresponding to given address */
125#define OFFSET_IN_PAGE(addr) \
126 ((size_t)(addr) & (PAGE_SIZE_4K-1))
127
128/* Returns bit offset within a DWORD of a bitfield */
129#define AMAP_BIT_OFFSET(_struct, field) \
130 (((size_t)&(((_struct *)0)->field))%32)
131
132/* Returns the bit mask of the field that is NOT shifted into location. */
133static inline u32 amap_mask(u32 bitsize)
134{
135 return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
136}
137
138static inline void amap_set(void *ptr, u32 dw_offset, u32 mask,
139 u32 offset, u32 value)
140{
141 u32 *dw = (u32 *) ptr + dw_offset;
142 *dw &= ~(mask << offset);
143 *dw |= (mask & value) << offset;
144}
145
146#define AMAP_SET_BITS(_struct, field, ptr, val) \
147 amap_set(ptr, \
148 offsetof(_struct, field)/32, \
149 amap_mask(sizeof(((_struct *)0)->field)), \
150 AMAP_BIT_OFFSET(_struct, field), \
151 val)
152
153static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
154{
155 u32 *dw = ptr;
156 return mask & (*(dw + dw_offset) >> offset);
157}
158
159#define AMAP_GET_BITS(_struct, field, ptr) \
160 amap_get(ptr, \
161 offsetof(_struct, field)/32, \
162 amap_mask(sizeof(((_struct *)0)->field)), \
163 AMAP_BIT_OFFSET(_struct, field))
164
165#define be_dws_cpu_to_le(wrb, len) swap_dws(wrb, len)
166#define be_dws_le_to_cpu(wrb, len) swap_dws(wrb, len)
167static inline void swap_dws(void *wrb, int len)
168{
169#ifdef __BIG_ENDIAN
170 u32 *dw = wrb;
171 WARN_ON(len % 4);
172 do {
173 *dw = cpu_to_le32(*dw);
174 dw++;
175 len -= 4;
176 } while (len);
177#endif /* __BIG_ENDIAN */
178}
179
180extern void beiscsi_cq_notify(struct be_ctrl_info *ctrl, u16 qid, bool arm,
181 u16 num_popped);
182
183#endif /* BEISCSI_H */