/**
* qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
* @irq:
* @dev_id: SCSI driver HA context
* @regs:
*
* Called by system whenever the host adapter generates an interrupt.
*
* Returns handled flag.
*/
irqreturn_t
qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
scsi_qla_host_t *ha;
device_reg_t __iomem *reg;
int status;
unsigned long flags;
unsigned long iter;
uint32_t mbx;
ha = (scsi_qla_host_t *) dev_id;
if (!ha) {
printk(KERN_INFO
"%s(): NULL host pointer\n", __func__);
return (IRQ_NONE);
}
reg = ha->iobase;
status = 0;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (iter = 50; iter--; ) {
if ((RD_REG_WORD(®->istatus) & ISR_RISC_INT) == 0)
break;
if (RD_REG_WORD(®->semaphore) & BIT_0) {
WRT_REG_WORD(®->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD(®->hccr);
/* Get mailbox data. */
mbx = RD_MAILBOX_REG(ha, reg, 0);
if (mbx > 0x3fff && mbx < 0x8000) {
qla2x00_mbx_completion(ha, (uint16_t)mbx);
status |= MBX_INTERRUPT;
} else if (mbx > 0x7fff && mbx < 0xc000) {
qla2x00_async_event(ha, mbx);
} else {
/*EMPTY*/
DEBUG2(printk("scsi(%ld): Unrecognized "
"interrupt type (%d)\n",
ha->host_no, mbx));
}
/* Release mailbox registers. */
WRT_REG_WORD(®->semaphore, 0);
RD_REG_WORD(®->semaphore);
} else {
qla2x00_process_response_queue(ha);
WRT_REG_WORD(®->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD(®->hccr);
}
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2x00_next(ha);
ha->last_irq_cpu = smp_processor_id();
ha->total_isr_cnt++;
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
spin_lock_irqsave(&ha->mbx_reg_lock, flags);
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
return (IRQ_HANDLED);
}
/**
* qla2x00_intr_handler() - Process interrupts for the ISP.
* @irq:
* @dev_id: SCSI driver HA context
* @regs:
*
* Called by system whenever the host adapter generates an interrupt.
*
* Returns handled flag.
*/
irqreturn_t
qla2x00_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
scsi_qla_host_t *ha;
device_reg_t *reg;
uint32_t mbx;
int status = 0;
unsigned long flags = 0;
unsigned long mbx_flags = 0;
unsigned long intr_iter;
uint32_t stat;
uint16_t hccr;
/* Don't loop forever, interrupt are OFF */
intr_iter = 50;
ha = (scsi_qla_host_t *) dev_id;
if (!ha) {
printk(KERN_INFO
"%s(): NULL host pointer\n", __func__);
return (IRQ_NONE);
}
reg = ha->iobase;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (;;) {
/* Relax CPU! */
if (!(intr_iter--))
break;
if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
if ((RD_REG_WORD(®->istatus) & ISR_RISC_INT) == 0)
break;
if (RD_REG_WORD(®->semaphore) & BIT_0) {
WRT_REG_WORD(®->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD(®->hccr);
/* Get mailbox data. */
mbx = RD_MAILBOX_REG(ha, reg, 0);
if (mbx > 0x3fff && mbx < 0x8000) {
qla2x00_mbx_completion(ha,
(uint16_t)mbx);
status |= MBX_INTERRUPT;
} else if (mbx > 0x7fff && mbx < 0xc000) {
qla2x00_async_event(ha, mbx);
} else {
/*EMPTY*/
DEBUG2(printk("scsi(%ld): Unrecognized "
"interrupt type (%d)\n",
ha->host_no, mbx));
}
/* Release mailbox registers. */
WRT_REG_WORD(®->semaphore, 0);
/* Workaround for ISP2100 chip. */
if (IS_QLA2100(ha))
RD_REG_WORD(®->semaphore);
} else {
qla2x00_process_response_queue(ha);
WRT_REG_WORD(®->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD(®->hccr);
}
} else /* IS_QLA23XX(ha) */ {
stat = RD_REG_DWORD(®->u.isp2300.host_status);
if ((stat & HSR_RISC_INT) == 0)
break;
mbx = MSW(stat);
switch (stat & 0xff) {
case 0x13:
qla2x00_process_response_queue(ha);
break;
case 0x1:
case 0x2:
case 0x10:
case 0x11:
qla2x00_mbx_completion(ha, (uint16_t)mbx);
status |= MBX_INTERRUPT;
/* Release mailbox registers. */
WRT_REG_WORD(®->semaphore, 0);
break;
case 0x12:
qla2x00_async_event(ha, mbx);
break;
case 0x15:
mbx = mbx << 16 | MBA_CMPLT_1_16BIT;
qla2x00_async_event(ha, mbx);
break;
case 0x16:
mbx = mbx << 16 | MBA_SCSI_COMPLETION;
qla2x00_async_event(ha, mbx);
break;
default:
hccr = RD_REG_WORD(®->hccr);
if (hccr & HCCR_RISC_PAUSE) {
qla_printk(KERN_INFO, ha,
"RISC paused, dumping HCCR=%x\n",
hccr);
/*
* Issue a "HARD" reset in order for
* the RISC interrupt bit to be
* cleared. Schedule a big hammmer to
* get out of the RISC PAUSED state.
*/
WRT_REG_WORD(®->hccr,
HCCR_RESET_RISC);
RD_REG_WORD(®->hccr);
set_bit(ISP_ABORT_NEEDED,
&ha->dpc_flags);
break;
} else {
DEBUG2(printk("scsi(%ld): Unrecognized "
"interrupt type (%d)\n",
ha->host_no, stat & 0xff));
}
break;
}
WRT_REG_WORD(®->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD(®->hccr);
}
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2x00_next(ha);
ha->last_irq_cpu = smp_processor_id();
ha->total_isr_cnt++;
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
/* There was a mailbox completion */
DEBUG3(printk("%s(%ld): Going to get mbx reg lock.\n",
__func__, ha->host_no));
spin_lock_irqsave(&ha->mbx_reg_lock, mbx_flags);
if (ha->mcp == NULL) {
DEBUG3(printk("%s(%ld): Error mbx pointer.\n",
__func__, ha->host_no));
} else {
DEBUG3(printk("%s(%ld): Going to set mbx intr flags. "
"cmd=%x.\n",
__func__, ha->host_no, ha->mcp->mb[0]));
}
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
DEBUG3(printk("%s(%ld): Going to wake up mbx function for "
"completion.\n",
__func__, ha->host_no));
up(&ha->mbx_intr_sem);
DEBUG3(printk("%s(%ld): Going to release mbx reg lock.\n",
__func__, ha->host_no));
spin_unlock_irqrestore(&ha->mbx_reg_lock, mbx_flags);
}
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
/* Wakeup the DPC routine */
if ((!ha->flags.mbox_busy &&
(test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))) &&
ha->dpc_wait && !ha->dpc_active) {
up(ha->dpc_wait);
}
return (IRQ_HANDLED);
}
/**
* qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
* @irq:
* @dev_id: SCSI driver HA context
* @regs:
*
* Called by system whenever the host adapter generates an interrupt.
*
* Returns handled flag.
*/
irqreturn_t
qla2300_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
scsi_qla_host_t *ha;
device_reg_t __iomem *reg;
int status;
unsigned long flags;
unsigned long iter;
uint32_t stat;
uint32_t mbx;
uint16_t hccr;
ha = (scsi_qla_host_t *) dev_id;
if (!ha) {
printk(KERN_INFO
"%s(): NULL host pointer\n", __func__);
return (IRQ_NONE);
}
reg = ha->iobase;
status = 0;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (iter = 50; iter--; ) {
stat = RD_REG_DWORD(®->u.isp2300.host_status);
if (stat & HSR_RISC_PAUSED) {
hccr = RD_REG_WORD(®->hccr);
if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
qla_printk(KERN_INFO, ha,
"Parity error -- HCCR=%x.\n", hccr);
else
qla_printk(KERN_INFO, ha,
"RISC paused -- HCCR=%x\n", hccr);
/*
* Issue a "HARD" reset in order for the RISC
* interrupt bit to be cleared. Schedule a big
* hammmer to get out of the RISC PAUSED state.
*/
WRT_REG_WORD(®->hccr, HCCR_RESET_RISC);
RD_REG_WORD(®->hccr);
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
} else if ((stat & HSR_RISC_INT) == 0)
break;
mbx = MSW(stat);
switch (stat & 0xff) {
case 0x13:
qla2x00_process_response_queue(ha);
break;
case 0x1:
case 0x2:
case 0x10:
case 0x11:
qla2x00_mbx_completion(ha, (uint16_t)mbx);
status |= MBX_INTERRUPT;
/* Release mailbox registers. */
WRT_REG_WORD(®->semaphore, 0);
break;
case 0x12:
qla2x00_async_event(ha, mbx);
break;
case 0x15:
mbx = mbx << 16 | MBA_CMPLT_1_16BIT;
qla2x00_async_event(ha, mbx);
break;
case 0x16:
mbx = mbx << 16 | MBA_SCSI_COMPLETION;
qla2x00_async_event(ha, mbx);
break;
default:
DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
"(%d)\n",
ha->host_no, stat & 0xff));
break;
}
WRT_REG_WORD(®->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD_RELAXED(®->hccr);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2x00_next(ha);
ha->last_irq_cpu = smp_processor_id();
ha->total_isr_cnt++;
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
spin_lock_irqsave(&ha->mbx_reg_lock, flags);
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
}
if (!list_empty(&ha->done_queue))
qla2x00_done(ha);
return (IRQ_HANDLED);
}
