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 26 struct be_dma_mem { 27 void *va; 28 dma_addr_t dma; 29 u32 size; 30 }; 31 32 struct 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 42 static inline u32 MODULO(u16 val, u16 limit) 43 { 44 WARN_ON(limit & (limit - 1)); 45 return val & (limit - 1); 46 } 47 48 static inline void index_inc(u16 *index, u16 limit) 49 { 50 *index = MODULO((*index + 1), limit); 51 } 52 53 static inline void *queue_head_node(struct be_queue_info *q) 54 { 55 return q->dma_mem.va + q->head * q->entry_size; 56 } 57 58 static inline void *queue_tail_node(struct be_queue_info *q) 59 { 60 return q->dma_mem.va + q->tail * q->entry_size; 61 } 62 63 static inline void queue_head_inc(struct be_queue_info *q) 64 { 65 index_inc(&q->head, q->len); 66 } 67 68 static inline void queue_tail_inc(struct be_queue_info *q) 69 { 70 index_inc(&q->tail, q->len); 71 } 72 73 /*ISCSI */ 74 75 struct 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 86 struct be_mcc_obj { 87 struct be_queue_info *q; 88 struct be_queue_info *cq; 89 }; 90 91 struct 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. */ 133 static inline u32 amap_mask(u32 bitsize) 134 { 135 return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1); 136 } 137 138 static 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) 152 153 static 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) 167 static 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 } 179 180 extern void beiscsi_cq_notify(struct be_ctrl_info *ctrl, u16 qid, bool arm, 181 u16 num_popped); 182 183 #endif /* BEISCSI_H */ 184