/*
* QLOGIC LINUX SOFTWARE
*
* QLogic ISP2x00 device driver for Linux 2.6.x
* Copyright (C) 2003-2004 QLogic Corporation
* (www.qlogic.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
*/
static __inline__ uint16_t qla2x00_debounce_register(volatile uint16_t __iomem *);
/*
* qla2x00_debounce_register
* Debounce register.
*
* Input:
* port = register address.
*
* Returns:
* register value.
*/
static __inline__ uint16_t
qla2x00_debounce_register(volatile uint16_t __iomem *addr)
{
volatile uint16_t first;
volatile uint16_t second;
do {
first = RD_REG_WORD(addr);
barrier();
cpu_relax();
second = RD_REG_WORD(addr);
} while (first != second);
return (first);
}
static __inline__ int qla2x00_normalize_dma_addr(
dma_addr_t *e_addr, uint32_t *e_len,
dma_addr_t *ne_addr, uint32_t *ne_len);
/**
* qla2x00_normalize_dma_addr() - Normalize an DMA address.
* @e_addr: Raw DMA address
* @e_len: Raw DMA length
* @ne_addr: Normalized second DMA address
* @ne_len: Normalized second DMA length
*
* If the address does not span a 4GB page boundary, the contents of @ne_addr
* and @ne_len are undefined. @e_len is updated to reflect a normalization.
*
* Example:
*
* ffffabc0ffffeeee (e_addr) start of DMA address
* 0000000020000000 (e_len) length of DMA transfer
* ffffabc11fffeeed end of DMA transfer
*
* Is the 4GB boundary crossed?
*
* ffffabc0ffffeeee (e_addr)
* ffffabc11fffeeed (e_addr + e_len - 1)
* 00000001e0000003 ((e_addr ^ (e_addr + e_len - 1))
* 0000000100000000 ((e_addr ^ (e_addr + e_len - 1)) & ~(0xffffffff)
*
* Compute start of second DMA segment:
*
* ffffabc0ffffeeee (e_addr)
* ffffabc1ffffeeee (0x100000000 + e_addr)
* ffffabc100000000 (0x100000000 + e_addr) & ~(0xffffffff)
* ffffabc100000000 (ne_addr)
*
* Compute length of second DMA segment:
*
* 00000000ffffeeee (e_addr & 0xffffffff)
* 0000000000001112 (0x100000000 - (e_addr & 0xffffffff))
* 000000001fffeeee (e_len - (0x100000000 - (e_addr & 0xffffffff))
* 000000001fffeeee (ne_len)
*
* Adjust length of first DMA segment
*
* 0000000020000000 (e_len)
* 0000000000001112 (e_len - ne_len)
* 0000000000001112 (e_len)
*
* Returns non-zero if the specified address was normalized, else zero.
*/
static __inline__ int
qla2x00_normalize_dma_addr(
dma_addr_t *e_addr, uint32_t *e_len,
dma_addr_t *ne_addr, uint32_t *ne_len)
{
int normalized;
normalized = 0;
if ((*e_addr ^ (*e_addr + *e_len - 1)) & ~(0xFFFFFFFFULL)) {
/* Compute normalized crossed address and len */
*ne_addr = (0x100000000ULL + *e_addr) & ~(0xFFFFFFFFULL);
*ne_len = *e_len - (0x100000000ULL - (*e_addr & 0xFFFFFFFFULL));
*e_len -= *ne_len;
normalized++;
}
return (normalized);
}
static __inline__ void qla2x00_poll(scsi_qla_host_t *);
static inline void
qla2x00_poll(scsi_qla_host_t *ha)
{
if (IS_QLA2100(ha) || IS_QLA2200(ha))
qla2100_intr_handler(0, ha, NULL);
else
qla2300_intr_handler(0, ha, NULL);
}
static __inline__ void qla2x00_enable_intrs(scsi_qla_host_t *);
static __inline__ void qla2x00_disable_intrs(scsi_qla_host_t *);
static inline void
qla2x00_enable_intrs(scsi_qla_host_t *ha)
{
unsigned long flags = 0;
device_reg_t __iomem *reg = ha->iobase;
spin_lock_irqsave(&ha->hardware_lock, flags);
ha->interrupts_on = 1;
/* enable risc and host interrupts */
WRT_REG_WORD(®->ictrl, ICR_EN_INT | ICR_EN_RISC);
RD_REG_WORD(®->ictrl);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static inline void
qla2x00_disable_intrs(scsi_qla_host_t *ha)
{
unsigned long flags = 0;
device_reg_t __iomem *reg = ha->iobase;
spin_lock_irqsave(&ha->hardware_lock, flags);
ha->interrupts_on = 0;
/* disable risc and host interrupts */
WRT_REG_WORD(®->ictrl, 0);
RD_REG_WORD(®->ictrl);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static __inline__ int qla2x00_is_wwn_zero(uint8_t *);
/*
* qla2x00_is_wwn_zero - Check for zero node name
*
* Input:
* wwn = Pointer to WW name to check
*
* Returns:
* 1 if name is 0x00 else 0
*
* Context:
* Kernel context.
*/
static __inline__ int
qla2x00_is_wwn_zero(uint8_t *wwn)
{
int cnt;
for (cnt = 0; cnt < WWN_SIZE ; cnt++, wwn++) {
if (*wwn != 0)
break;
}
/* if zero return 1 */
if (cnt == WWN_SIZE)
return (1);
else
return (0);
}
static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *);
/*
* This routine will wait for fabric devices for
* the reset delay.
*/
static __inline__ void qla2x00_check_fabric_devices(scsi_qla_host_t *ha)
{
uint16_t fw_state;
qla2x00_get_firmware_state(ha, &fw_state);
}
/**
* qla2x00_issue_marker() - Issue a Marker IOCB if necessary.
* @ha: HA context
* @ha_locked: is function called with the hardware lock
*
* Returns non-zero if a failure occured, else zero.
*/
static inline int
qla2x00_issue_marker(scsi_qla_host_t *ha, int ha_locked)
{
/* Send marker if required */
if (ha->marker_needed != 0) {
if (ha_locked) {
if (__qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
QLA_SUCCESS)
return (QLA_FUNCTION_FAILED);
} else {
if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) !=
QLA_SUCCESS)
return (QLA_FUNCTION_FAILED);
}
ha->marker_needed = 0;
}
return (QLA_SUCCESS);
}
static __inline__ void qla2x00_add_timer_to_cmd(srb_t *, int);
static __inline__ void qla2x00_delete_timer_from_cmd(srb_t *);
/**************************************************************************
* qla2x00_add_timer_to_cmd
*
* Description:
* Creates a timer for the specified command. The timeout is usually
* the command time from kernel minus 2 secs.
*
* Input:
* sp - pointer to validate
*
* Returns:
* None.
**************************************************************************/
static inline void
qla2x00_add_timer_to_cmd(srb_t *sp, int timeout)
{
init_timer(&sp->timer);
sp->timer.expires = jiffies + timeout * HZ;
sp->timer.data = (unsigned long) sp;
sp->timer.function = (void (*) (unsigned long))qla2x00_cmd_timeout;
add_timer(&sp->timer);
}
/**************************************************************************
* qla2x00_delete_timer_from_cmd
*
* Description:
* Delete the timer for the specified command.
*
* Input:
* sp - pointer to validate
*
* Returns:
* None.
**************************************************************************/
static inline void
qla2x00_delete_timer_from_cmd(srb_t *sp)
{
if (sp->timer.function != NULL) {
del_timer(&sp->timer);
sp->timer.function = NULL;
sp->timer.data = (unsigned long) NULL;
}
}
