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 #include <linux/blk-iopoll.h> 24 #define FW_VER_LEN 32 25 #define MCC_Q_LEN 128 26 #define MCC_CQ_LEN 256 27 28 struct be_dma_mem { 29 void *va; 30 dma_addr_t dma; 31 u32 size; 32 }; 33 34 struct be_queue_info { 35 struct be_dma_mem dma_mem; 36 u16 len; 37 u16 entry_size; /* Size of an element in the queue */ 38 u16 id; 39 u16 tail, head; 40 bool created; 41 atomic_t used; /* Number of valid elements in the queue */ 42 }; 43 44 static inline u32 MODULO(u16 val, u16 limit) 45 { 46 WARN_ON(limit & (limit - 1)); 47 return val & (limit - 1); 48 } 49 50 static inline void index_inc(u16 *index, u16 limit) 51 { 52 *index = MODULO((*index + 1), limit); 53 } 54 55 static inline void *queue_head_node(struct be_queue_info *q) 56 { 57 return q->dma_mem.va + q->head * q->entry_size; 58 } 59 60 static inline void *queue_tail_node(struct be_queue_info *q) 61 { 62 return q->dma_mem.va + q->tail * q->entry_size; 63 } 64 65 static inline void queue_head_inc(struct be_queue_info *q) 66 { 67 index_inc(&q->head, q->len); 68 } 69 70 static inline void queue_tail_inc(struct be_queue_info *q) 71 { 72 index_inc(&q->tail, q->len); 73 } 74 75 /*ISCSI */ 76 77 struct be_eq_obj { 78 struct be_queue_info q; 79 struct beiscsi_hba *phba; 80 struct be_queue_info *cq; 81 struct blk_iopoll iopoll; 82 }; 83 84 struct be_mcc_obj { 85 struct be_queue_info q; 86 struct be_queue_info cq; 87 }; 88 89 struct be_ctrl_info { 90 u8 __iomem *csr; 91 u8 __iomem *db; /* Door Bell */ 92 u8 __iomem *pcicfg; /* PCI config space */ 93 struct pci_dev *pdev; 94 95 /* Mbox used for cmd request/response */ 96 spinlock_t mbox_lock; /* For serializing mbox cmds to BE card */ 97 struct be_dma_mem mbox_mem; 98 /* Mbox mem is adjusted to align to 16 bytes. The allocated addr 99 * is stored for freeing purpose */ 100 struct be_dma_mem mbox_mem_alloced; 101 102 /* MCC Rings */ 103 struct be_mcc_obj mcc_obj; 104 spinlock_t mcc_lock; /* For serializing mcc cmds to BE card */ 105 spinlock_t mcc_cq_lock; 106 107 /* MCC Async callback */ 108 void (*async_cb) (void *adapter, bool link_up); 109 void *adapter_ctxt; 110 }; 111 112 #include "be_cmds.h" 113 114 #define PAGE_SHIFT_4K 12 115 #define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K) 116 117 /* Returns number of pages spanned by the data starting at the given addr */ 118 #define PAGES_4K_SPANNED(_address, size) \ 119 ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) + \ 120 (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K)) 121 122 /* Byte offset into the page corresponding to given address */ 123 #define OFFSET_IN_PAGE(addr) \ 124 ((size_t)(addr) & (PAGE_SIZE_4K-1)) 125 126 /* Returns bit offset within a DWORD of a bitfield */ 127 #define AMAP_BIT_OFFSET(_struct, field) \ 128 (((size_t)&(((_struct *)0)->field))%32) 129 130 /* Returns the bit mask of the field that is NOT shifted into location. */ 131 static inline u32 amap_mask(u32 bitsize) 132 { 133 return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1); 134 } 135 136 static inline void amap_set(void *ptr, u32 dw_offset, u32 mask, 137 u32 offset, u32 value) 138 { 139 u32 *dw = (u32 *) ptr + dw_offset; 140 *dw &= ~(mask << offset); 141 *dw |= (mask & value) << offset; 142 } 143 144 #define AMAP_SET_BITS(_struct, field, ptr, val) \ 145 amap_set(ptr, \ 146 offsetof(_struct, field)/32, \ 147 amap_mask(sizeof(((_struct *)0)->field)), \ 148 AMAP_BIT_OFFSET(_struct, field), \ 149 val) 150 151 static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset) 152 { 153 u32 *dw = ptr; 154 return mask & (*(dw + dw_offset) >> offset); 155 } 156 157 #define AMAP_GET_BITS(_struct, field, ptr) \ 158 amap_get(ptr, \ 159 offsetof(_struct, field)/32, \ 160 amap_mask(sizeof(((_struct *)0)->field)), \ 161 AMAP_BIT_OFFSET(_struct, field)) 162 163 #define be_dws_cpu_to_le(wrb, len) swap_dws(wrb, len) 164 #define be_dws_le_to_cpu(wrb, len) swap_dws(wrb, len) 165 static inline void swap_dws(void *wrb, int len) 166 { 167 #ifdef __BIG_ENDIAN 168 u32 *dw = wrb; 169 WARN_ON(len % 4); 170 do { 171 *dw = cpu_to_le32(*dw); 172 dw++; 173 len -= 4; 174 } while (len); 175 #endif /* __BIG_ENDIAN */ 176 } 177 #endif /* BEISCSI_H */ 178