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linux_dsm_epyc7002/drivers/scsi/qla4xxx/ql4_isr.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

797 lines
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/*
* QLogic iSCSI HBA Driver
* Copyright (c) 2003-2006 QLogic Corporation
*
* See LICENSE.qla4xxx for copyright and licensing details.
*/
#include "ql4_def.h"
/**
* qla2x00_process_completed_request() - Process a Fast Post response.
* @ha: SCSI driver HA context
* @index: SRB index
**/
static void qla4xxx_process_completed_request(struct scsi_qla_host *ha,
uint32_t index)
{
struct srb *srb;
srb = qla4xxx_del_from_active_array(ha, index);
if (srb) {
/* Save ISP completion status */
srb->cmd->result = DID_OK << 16;
qla4xxx_srb_compl(ha, srb);
} else {
DEBUG2(printk("scsi%ld: Invalid ISP SCSI completion handle = "
"%d\n", ha->host_no, index));
set_bit(DPC_RESET_HA, &ha->dpc_flags);
}
}
/**
* qla4xxx_status_entry - processes status IOCBs
* @ha: Pointer to host adapter structure.
* @sts_entry: Pointer to status entry structure.
**/
static void qla4xxx_status_entry(struct scsi_qla_host *ha,
struct status_entry *sts_entry)
{
uint8_t scsi_status;
struct scsi_cmnd *cmd;
struct srb *srb;
struct ddb_entry *ddb_entry;
uint32_t residual;
uint16_t sensebytecnt;
if (sts_entry->completionStatus == SCS_COMPLETE &&
sts_entry->scsiStatus == 0) {
qla4xxx_process_completed_request(ha,
le32_to_cpu(sts_entry->
handle));
return;
}
srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
if (!srb) {
/* FIXMEdg: Don't we need to reset ISP in this case??? */
DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
"handle 0x%x, sp=%p. This cmd may have already "
"been completed.\n", ha->host_no, __func__,
le32_to_cpu(sts_entry->handle), srb));
return;
}
cmd = srb->cmd;
if (cmd == NULL) {
DEBUG2(printk("scsi%ld: %s: Command already returned back to "
"OS pkt->handle=%d srb=%p srb->state:%d\n",
ha->host_no, __func__, sts_entry->handle,
srb, srb->state));
dev_warn(&ha->pdev->dev, "Command is NULL:"
" already returned to OS (srb=%p)\n", srb);
return;
}
ddb_entry = srb->ddb;
if (ddb_entry == NULL) {
cmd->result = DID_NO_CONNECT << 16;
goto status_entry_exit;
}
residual = le32_to_cpu(sts_entry->residualByteCnt);
/* Translate ISP error to a Linux SCSI error. */
scsi_status = sts_entry->scsiStatus;
switch (sts_entry->completionStatus) {
case SCS_COMPLETE:
if (scsi_status == 0) {
cmd->result = DID_OK << 16;
break;
}
if (sts_entry->iscsiFlags &
(ISCSI_FLAG_RESIDUAL_OVER|ISCSI_FLAG_RESIDUAL_UNDER))
cmd->resid = residual;
cmd->result = DID_OK << 16 | scsi_status;
if (scsi_status != SCSI_CHECK_CONDITION)
break;
/* Copy Sense Data into sense buffer. */
memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
sensebytecnt = le16_to_cpu(sts_entry->senseDataByteCnt);
if (sensebytecnt == 0)
break;
memcpy(cmd->sense_buffer, sts_entry->senseData,
min(sensebytecnt,
(uint16_t) sizeof(cmd->sense_buffer)));
DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
"ASC/ASCQ = %02x/%02x\n", ha->host_no,
cmd->device->channel, cmd->device->id,
cmd->device->lun, __func__,
sts_entry->senseData[2] & 0x0f,
sts_entry->senseData[12],
sts_entry->senseData[13]));
srb->flags |= SRB_GOT_SENSE;
break;
case SCS_INCOMPLETE:
/* Always set the status to DID_ERROR, since
* all conditions result in that status anyway */
cmd->result = DID_ERROR << 16;
break;
case SCS_RESET_OCCURRED:
DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
ha->host_no, cmd->device->channel,
cmd->device->id, cmd->device->lun, __func__));
cmd->result = DID_RESET << 16;
break;
case SCS_ABORTED:
DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
ha->host_no, cmd->device->channel,
cmd->device->id, cmd->device->lun, __func__));
cmd->result = DID_RESET << 16;
break;
case SCS_TIMEOUT:
DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
ha->host_no, cmd->device->channel,
cmd->device->id, cmd->device->lun));
cmd->result = DID_BUS_BUSY << 16;
/*
* Mark device missing so that we won't continue to send
* I/O to this device. We should get a ddb state change
* AEN soon.
*/
if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
qla4xxx_mark_device_missing(ha, ddb_entry);
break;
case SCS_DATA_UNDERRUN:
case SCS_DATA_OVERRUN:
if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun, "
"residual = 0x%x\n", ha->host_no,
cmd->device->channel, cmd->device->id,
cmd->device->lun, __func__, residual));
cmd->result = DID_ERROR << 16;
break;
}
if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
/*
* Firmware detected a SCSI transport underrun
* condition
*/
cmd->resid = residual;
DEBUG2(printk("scsi%ld:%d:%d:%d: %s: UNDERRUN status "
"detected, xferlen = 0x%x, residual = "
"0x%x\n",
ha->host_no, cmd->device->channel,
cmd->device->id,
cmd->device->lun, __func__,
cmd->request_bufflen,
residual));
}
/*
* If there is scsi_status, it takes precedense over
* underflow condition.
*/
if (scsi_status != 0) {
cmd->result = DID_OK << 16 | scsi_status;
if (scsi_status != SCSI_CHECK_CONDITION)
break;
/* Copy Sense Data into sense buffer. */
memset(cmd->sense_buffer, 0,
sizeof(cmd->sense_buffer));
sensebytecnt =
le16_to_cpu(sts_entry->senseDataByteCnt);
if (sensebytecnt == 0)
break;
memcpy(cmd->sense_buffer, sts_entry->senseData,
min(sensebytecnt,
(uint16_t) sizeof(cmd->sense_buffer)));
DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
"ASC/ASCQ = %02x/%02x\n", ha->host_no,
cmd->device->channel, cmd->device->id,
cmd->device->lun, __func__,
sts_entry->senseData[2] & 0x0f,
sts_entry->senseData[12],
sts_entry->senseData[13]));
} else {
/*
* If RISC reports underrun and target does not
* report it then we must have a lost frame, so
* tell upper layer to retry it by reporting a
* bus busy.
*/
if ((sts_entry->iscsiFlags &
ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
cmd->result = DID_BUS_BUSY << 16;
} else if ((cmd->request_bufflen - residual) <
cmd->underflow) {
/*
* Handle mid-layer underflow???
*
* For kernels less than 2.4, the driver must
* return an error if an underflow is detected.
* For kernels equal-to and above 2.4, the
* mid-layer will appearantly handle the
* underflow by detecting the residual count --
* unfortunately, we do not see where this is
* actually being done. In the interim, we
* will return DID_ERROR.
*/
DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
"Mid-layer Data underrun, "
"xferlen = 0x%x, "
"residual = 0x%x\n", ha->host_no,
cmd->device->channel,
cmd->device->id,
cmd->device->lun, __func__,
cmd->request_bufflen, residual));
cmd->result = DID_ERROR << 16;
} else {
cmd->result = DID_OK << 16;
}
}
break;
case SCS_DEVICE_LOGGED_OUT:
case SCS_DEVICE_UNAVAILABLE:
/*
* Mark device missing so that we won't continue to
* send I/O to this device. We should get a ddb
* state change AEN soon.
*/
if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
qla4xxx_mark_device_missing(ha, ddb_entry);
cmd->result = DID_BUS_BUSY << 16;
break;
case SCS_QUEUE_FULL:
/*
* SCSI Mid-Layer handles device queue full
*/
cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
"compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
" iResp=%02x\n", ha->host_no, cmd->device->id,
cmd->device->lun, __func__,
sts_entry->completionStatus,
sts_entry->scsiStatus, sts_entry->state_flags,
sts_entry->iscsiFlags,
sts_entry->iscsiResponse));
break;
default:
cmd->result = DID_ERROR << 16;
break;
}
status_entry_exit:
/* complete the request */
srb->cc_stat = sts_entry->completionStatus;
qla4xxx_srb_compl(ha, srb);
}
/**
* qla4xxx_process_response_queue - process response queue completions
* @ha: Pointer to host adapter structure.
*
* This routine process response queue completions in interrupt context.
* Hardware_lock locked upon entry
**/
static void qla4xxx_process_response_queue(struct scsi_qla_host * ha)
{
uint32_t count = 0;
struct srb *srb = NULL;
struct status_entry *sts_entry;
/* Process all responses from response queue */
while ((ha->response_in =
(uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in)) !=
ha->response_out) {
sts_entry = (struct status_entry *) ha->response_ptr;
count++;
/* Advance pointers for next entry */
if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
ha->response_out = 0;
ha->response_ptr = ha->response_ring;
} else {
ha->response_out++;
ha->response_ptr++;
}
/* process entry */
switch (sts_entry->hdr.entryType) {
case ET_STATUS:
/*
* Common status - Single completion posted in single
* IOSB.
*/
qla4xxx_status_entry(ha, sts_entry);
break;
case ET_PASSTHRU_STATUS:
break;
case ET_STATUS_CONTINUATION:
/* Just throw away the status continuation entries */
DEBUG2(printk("scsi%ld: %s: Status Continuation entry "
"- ignoring\n", ha->host_no, __func__));
break;
case ET_COMMAND:
/* ISP device queue is full. Command not
* accepted by ISP. Queue command for
* later */
srb = qla4xxx_del_from_active_array(ha,
le32_to_cpu(sts_entry->
handle));
if (srb == NULL)
goto exit_prq_invalid_handle;
DEBUG2(printk("scsi%ld: %s: FW device queue full, "
"srb %p\n", ha->host_no, __func__, srb));
/* ETRY normally by sending it back with
* DID_BUS_BUSY */
srb->cmd->result = DID_BUS_BUSY << 16;
qla4xxx_srb_compl(ha, srb);
break;
case ET_CONTINUE:
/* Just throw away the continuation entries */
DEBUG2(printk("scsi%ld: %s: Continuation entry - "
"ignoring\n", ha->host_no, __func__));
break;
default:
/*
* Invalid entry in response queue, reset RISC
* firmware.
*/
DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
"response queue \n", ha->host_no,
__func__,
sts_entry->hdr.entryType));
goto exit_prq_error;
}
}
/*
* Done with responses, update the ISP For QLA4010, this also clears
* the interrupt.
*/
writel(ha->response_out, &ha->reg->rsp_q_out);
readl(&ha->reg->rsp_q_out);
return;
exit_prq_invalid_handle:
DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
ha->host_no, __func__, srb, sts_entry->hdr.entryType,
sts_entry->completionStatus));
exit_prq_error:
writel(ha->response_out, &ha->reg->rsp_q_out);
readl(&ha->reg->rsp_q_out);
set_bit(DPC_RESET_HA, &ha->dpc_flags);
}
/**
* qla4xxx_isr_decode_mailbox - decodes mailbox status
* @ha: Pointer to host adapter structure.
* @mailbox_status: Mailbox status.
*
* This routine decodes the mailbox status during the ISR.
* Hardware_lock locked upon entry. runs in interrupt context.
**/
static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
uint32_t mbox_status)
{
int i;
if ((mbox_status == MBOX_STS_BUSY) ||
(mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
(mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
ha->mbox_status[0] = mbox_status;
if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
/*
* Copy all mailbox registers to a temporary
* location and set mailbox command done flag
*/
for (i = 1; i < ha->mbox_status_count; i++)
ha->mbox_status[i] =
readl(&ha->reg->mailbox[i]);
set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
wake_up(&ha->mailbox_wait_queue);
}
} else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
/* Immediately process the AENs that don't require much work.
* Only queue the database_changed AENs */
switch (mbox_status) {
case MBOX_ASTS_SYSTEM_ERROR:
/* Log Mailbox registers */
if (ql4xdontresethba) {
DEBUG2(printk("%s:Dont Reset HBA\n",
__func__));
} else {
set_bit(AF_GET_CRASH_RECORD, &ha->flags);
set_bit(DPC_RESET_HA, &ha->dpc_flags);
}
break;
case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
case MBOX_ASTS_NVRAM_INVALID:
case MBOX_ASTS_IP_ADDRESS_CHANGED:
case MBOX_ASTS_DHCP_LEASE_EXPIRED:
DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
"Reset HA\n", ha->host_no, mbox_status));
set_bit(DPC_RESET_HA, &ha->dpc_flags);
break;
case MBOX_ASTS_LINK_UP:
DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK UP\n",
ha->host_no, mbox_status));
set_bit(AF_LINK_UP, &ha->flags);
break;
case MBOX_ASTS_LINK_DOWN:
DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK DOWN\n",
ha->host_no, mbox_status));
clear_bit(AF_LINK_UP, &ha->flags);
break;
case MBOX_ASTS_HEARTBEAT:
ha->seconds_since_last_heartbeat = 0;
break;
case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
"ACQUIRED\n", ha->host_no, mbox_status));
set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
break;
case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
* mode
* only */
case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
case MBOX_ASTS_SUBNET_STATE_CHANGE:
/* No action */
DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
mbox_status));
break;
case MBOX_ASTS_MAC_ADDRESS_CHANGED:
case MBOX_ASTS_DNS:
/* No action */
DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
"mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
ha->host_no, mbox_status,
readl(&ha->reg->mailbox[1]),
readl(&ha->reg->mailbox[2])));
break;
case MBOX_ASTS_SELF_TEST_FAILED:
case MBOX_ASTS_LOGIN_FAILED:
/* No action */
DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
"mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
ha->host_no, mbox_status,
readl(&ha->reg->mailbox[1]),
readl(&ha->reg->mailbox[2]),
readl(&ha->reg->mailbox[3])));
break;
case MBOX_ASTS_DATABASE_CHANGED:
/* Queue AEN information and process it in the DPC
* routine */
if (ha->aen_q_count > 0) {
/* advance pointer */
if (ha->aen_in == (MAX_AEN_ENTRIES - 1))
ha->aen_in = 0;
else
ha->aen_in++;
/* decrement available counter */
ha->aen_q_count--;
for (i = 1; i < MBOX_AEN_REG_COUNT; i++)
ha->aen_q[ha->aen_in].mbox_sts[i] =
readl(&ha->reg->mailbox[i]);
ha->aen_q[ha->aen_in].mbox_sts[0] = mbox_status;
/* print debug message */
DEBUG2(printk("scsi%ld: AEN[%d] %04x queued"
" mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n",
ha->host_no, ha->aen_in,
mbox_status,
ha->aen_q[ha->aen_in].mbox_sts[1],
ha->aen_q[ha->aen_in].mbox_sts[2],
ha->aen_q[ha->aen_in].mbox_sts[3],
ha->aen_q[ha->aen_in]. mbox_sts[4]));
/* The DPC routine will process the aen */
set_bit(DPC_AEN, &ha->dpc_flags);
} else {
DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
"overflowed! AEN LOST!!\n",
ha->host_no, __func__,
mbox_status));
DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
ha->host_no));
for (i = 0; i < MAX_AEN_ENTRIES; i++) {
DEBUG2(printk("AEN[%d] %04x %04x %04x "
"%04x\n", i,
ha->aen_q[i].mbox_sts[0],
ha->aen_q[i].mbox_sts[1],
ha->aen_q[i].mbox_sts[2],
ha->aen_q[i].mbox_sts[3]));
}
}
break;
default:
DEBUG2(printk(KERN_WARNING
"scsi%ld: AEN %04x UNKNOWN\n",
ha->host_no, mbox_status));
break;
}
} else {
DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
ha->host_no, mbox_status));
ha->mbox_status[0] = mbox_status;
}
}
/**
* qla4xxx_interrupt_service_routine - isr
* @ha: pointer to host adapter structure.
*
* This is the main interrupt service routine.
* hardware_lock locked upon entry. runs in interrupt context.
**/
void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
uint32_t intr_status)
{
/* Process response queue interrupt. */
if (intr_status & CSR_SCSI_COMPLETION_INTR)
qla4xxx_process_response_queue(ha);
/* Process mailbox/asynch event interrupt.*/
if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
qla4xxx_isr_decode_mailbox(ha,
readl(&ha->reg->mailbox[0]));
/* Clear Mailbox Interrupt */
writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
&ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
}
}
/**
* qla4xxx_intr_handler - hardware interrupt handler.
* @irq: Unused
* @dev_id: Pointer to host adapter structure
**/
irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
{
struct scsi_qla_host *ha;
uint32_t intr_status;
unsigned long flags = 0;
uint8_t reqs_count = 0;
ha = (struct scsi_qla_host *) dev_id;
if (!ha) {
DEBUG2(printk(KERN_INFO
"qla4xxx: Interrupt with NULL host ptr\n"));
return IRQ_NONE;
}
spin_lock_irqsave(&ha->hardware_lock, flags);
/*
* Repeatedly service interrupts up to a maximum of
* MAX_REQS_SERVICED_PER_INTR
*/
while (1) {
/*
* Read interrupt status
*/
if (le32_to_cpu(ha->shadow_regs->rsp_q_in) !=
ha->response_out)
intr_status = CSR_SCSI_COMPLETION_INTR;
else
intr_status = readl(&ha->reg->ctrl_status);
if ((intr_status &
(CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) ==
0) {
if (reqs_count == 0)
ha->spurious_int_count++;
break;
}
if (intr_status & CSR_FATAL_ERROR) {
DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
"Status 0x%04x\n", ha->host_no,
readl(isp_port_error_status (ha))));
/* Issue Soft Reset to clear this error condition.
* This will prevent the RISC from repeatedly
* interrupting the driver; thus, allowing the DPC to
* get scheduled to continue error recovery.
* NOTE: Disabling RISC interrupts does not work in
* this case, as CSR_FATAL_ERROR overrides
* CSR_SCSI_INTR_ENABLE */
if ((readl(&ha->reg->ctrl_status) &
CSR_SCSI_RESET_INTR) == 0) {
writel(set_rmask(CSR_SOFT_RESET),
&ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
}
writel(set_rmask(CSR_FATAL_ERROR),
&ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
__qla4xxx_disable_intrs(ha);
set_bit(DPC_RESET_HA, &ha->dpc_flags);
break;
} else if (intr_status & CSR_SCSI_RESET_INTR) {
clear_bit(AF_ONLINE, &ha->flags);
__qla4xxx_disable_intrs(ha);
writel(set_rmask(CSR_SCSI_RESET_INTR),
&ha->reg->ctrl_status);
readl(&ha->reg->ctrl_status);
set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
break;
} else if (intr_status & INTR_PENDING) {
qla4xxx_interrupt_service_routine(ha, intr_status);
ha->total_io_count++;
if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
break;
intr_status = 0;
}
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return IRQ_HANDLED;
}
/**
* qla4xxx_process_aen - processes AENs generated by firmware
* @ha: pointer to host adapter structure.
* @process_aen: type of AENs to process
*
* Processes specific types of Asynchronous Events generated by firmware.
* The type of AENs to process is specified by process_aen and can be
* PROCESS_ALL_AENS 0
* FLUSH_DDB_CHANGED_AENS 1
* RELOGIN_DDB_CHANGED_AENS 2
**/
void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
{
uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
struct aen *aen;
int i;
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
while (ha->aen_out != ha->aen_in) {
/* Advance pointers for next entry */
if (ha->aen_out == (MAX_AEN_ENTRIES - 1))
ha->aen_out = 0;
else
ha->aen_out++;
ha->aen_q_count++;
aen = &ha->aen_q[ha->aen_out];
/* copy aen information to local structure */
for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
mbox_sts[i] = aen->mbox_sts[i];
spin_unlock_irqrestore(&ha->hardware_lock, flags);
DEBUG(printk("scsi%ld: AEN[%d] %04x, index [%d] state=%04x "
"mod=%x conerr=%08x \n", ha->host_no, ha->aen_out,
mbox_sts[0], mbox_sts[2], mbox_sts[3],
mbox_sts[1], mbox_sts[4]));
switch (mbox_sts[0]) {
case MBOX_ASTS_DATABASE_CHANGED:
if (process_aen == FLUSH_DDB_CHANGED_AENS) {
DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
"[%d] state=%04x FLUSHED!\n",
ha->host_no, ha->aen_out,
mbox_sts[0], mbox_sts[2],
mbox_sts[3]));
break;
} else if (process_aen == RELOGIN_DDB_CHANGED_AENS) {
/* for use during init time, we only want to
* relogin non-active ddbs */
struct ddb_entry *ddb_entry;
ddb_entry =
/* FIXME: name length? */
qla4xxx_lookup_ddb_by_fw_index(ha,
mbox_sts[2]);
if (!ddb_entry)
break;
ddb_entry->dev_scan_wait_to_complete_relogin =
0;
ddb_entry->dev_scan_wait_to_start_relogin =
jiffies +
((ddb_entry->default_time2wait +
4) * HZ);
DEBUG2(printk("scsi%ld: ddb index [%d] initate"
" RELOGIN after %d seconds\n",
ha->host_no,
ddb_entry->fw_ddb_index,
ddb_entry->default_time2wait +
4));
break;
}
if (mbox_sts[1] == 0) { /* Global DB change. */
qla4xxx_reinitialize_ddb_list(ha);
} else if (mbox_sts[1] == 1) { /* Specific device. */
qla4xxx_process_ddb_changed(ha, mbox_sts[2],
mbox_sts[3]);
}
break;
}
spin_lock_irqsave(&ha->hardware_lock, flags);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
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