2 * Copyright (C) 2005 - 2009 ServerEngines
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.
10 * Contact Information:
11 * linux-drivers@serverengines.com
14 * 209 N. Fair Oaks Ave
21 #include <linux/pci.h>
22 #include <linux/if_vlan.h>
23 #include <linux/blk-iopoll.h>
26 #define MCC_CQ_LEN 256
27 #define MAX_MCC_CMD 16
35 struct be_queue_info {
36 struct be_dma_mem dma_mem;
38 u16 entry_size; /* Size of an element in the queue */
42 atomic_t used; /* Number of valid elements in the queue */
45 static inline u32 MODULO(u16 val, u16 limit)
47 WARN_ON(limit & (limit - 1));
48 return val & (limit - 1);
51 static inline void index_inc(u16 *index, u16 limit)
53 *index = MODULO((*index + 1), limit);
56 static inline void *queue_head_node(struct be_queue_info *q)
58 return q->dma_mem.va + q->head * q->entry_size;
61 static inline void *queue_get_wrb(struct be_queue_info *q, unsigned int wrb_num)
63 return q->dma_mem.va + wrb_num * q->entry_size;
66 static inline void *queue_tail_node(struct be_queue_info *q)
68 return q->dma_mem.va + q->tail * q->entry_size;
71 static inline void queue_head_inc(struct be_queue_info *q)
73 index_inc(&q->head, q->len);
76 static inline void queue_tail_inc(struct be_queue_info *q)
78 index_inc(&q->tail, q->len);
84 struct be_queue_info q;
85 struct beiscsi_hba *phba;
86 struct be_queue_info *cq;
87 struct blk_iopoll iopoll;
91 struct be_queue_info q;
92 struct be_queue_info cq;
97 u8 __iomem *db; /* Door Bell */
98 u8 __iomem *pcicfg; /* PCI config space */
101 /* Mbox used for cmd request/response */
102 spinlock_t mbox_lock; /* For serializing mbox cmds to BE card */
103 struct be_dma_mem mbox_mem;
104 /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
105 * is stored for freeing purpose */
106 struct be_dma_mem mbox_mem_alloced;
109 struct be_mcc_obj mcc_obj;
110 spinlock_t mcc_lock; /* For serializing mcc cmds to BE card */
111 spinlock_t mcc_cq_lock;
113 wait_queue_head_t mcc_wait[MAX_MCC_CMD + 1];
114 unsigned int mcc_tag[MAX_MCC_CMD];
115 unsigned int mcc_numtag[MAX_MCC_CMD + 1];
116 unsigned short mcc_alloc_index;
117 unsigned short mcc_free_index;
118 unsigned int mcc_tag_available;
123 #define PAGE_SHIFT_4K 12
124 #define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K)
125 #define mcc_timeout 120000 /* 5s timeout */
127 /* Returns number of pages spanned by the data starting at the given addr */
128 #define PAGES_4K_SPANNED(_address, size) \
129 ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) + \
130 (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
132 /* Byte offset into the page corresponding to given address */
133 #define OFFSET_IN_PAGE(addr) \
134 ((size_t)(addr) & (PAGE_SIZE_4K-1))
136 /* Returns bit offset within a DWORD of a bitfield */
137 #define AMAP_BIT_OFFSET(_struct, field) \
138 (((size_t)&(((_struct *)0)->field))%32)
140 /* Returns the bit mask of the field that is NOT shifted into location. */
141 static inline u32 amap_mask(u32 bitsize)
143 return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
146 static inline void amap_set(void *ptr, u32 dw_offset, u32 mask,
147 u32 offset, u32 value)
149 u32 *dw = (u32 *) ptr + dw_offset;
150 *dw &= ~(mask << offset);
151 *dw |= (mask & value) << offset;
154 #define AMAP_SET_BITS(_struct, field, ptr, val) \
156 offsetof(_struct, field)/32, \
157 amap_mask(sizeof(((_struct *)0)->field)), \
158 AMAP_BIT_OFFSET(_struct, field), \
161 static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
164 return mask & (*(dw + dw_offset) >> offset);
167 #define AMAP_GET_BITS(_struct, field, ptr) \
169 offsetof(_struct, field)/32, \
170 amap_mask(sizeof(((_struct *)0)->field)), \
171 AMAP_BIT_OFFSET(_struct, field))
173 #define be_dws_cpu_to_le(wrb, len) swap_dws(wrb, len)
174 #define be_dws_le_to_cpu(wrb, len) swap_dws(wrb, len)
175 static inline void swap_dws(void *wrb, int len)
181 *dw = cpu_to_le32(*dw);
185 #endif /* __BIG_ENDIAN */
187 #endif /* BEISCSI_H */