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/**
* Copyright (C) 2005 - 2009 ServerEngines
* 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@serverengines.com
*
* ServerEngines
* 209 N. Fair Oaks Ave
* Sunnyvale, CA 94085
*/
#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
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 {
struct be_queue_info q;
struct beiscsi_hba *phba;
struct be_queue_info *cq;
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 /* 5s 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))
/* Byte offset into the page corresponding to given address */
#define OFFSET_IN_PAGE(addr) \
((size_t)(addr) & (PAGE_SIZE_4K-1))
/* 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 */
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