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linuxdebug/drivers/scsi/esas2r/esas2r_int.c

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null pointer error
2024-07-16 15:50:57 +02:00
/*
* linux/drivers/scsi/esas2r/esas2r_int.c
* esas2r interrupt handling
*
* Copyright (c) 2001-2013 ATTO Technology, Inc.
* (mailto:linuxdrivers@attotech.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; version 2 of the License.
*
* 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.
*
* NO WARRANTY
* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
* solely responsible for determining the appropriateness of using and
* distributing the Program and assumes all risks associated with its
* exercise of rights under this Agreement, including but not limited to
* the risks and costs of program errors, damage to or loss of data,
* programs or equipment, and unavailability or interruption of operations.
*
* DISCLAIMER OF LIABILITY
* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
#include "esas2r.h"
/* Local function prototypes */
static void esas2r_doorbell_interrupt(struct esas2r_adapter *a, u32 doorbell);
static void esas2r_get_outbound_responses(struct esas2r_adapter *a);
static void esas2r_process_bus_reset(struct esas2r_adapter *a);
/*
* Poll the adapter for interrupts and service them.
* This function handles both legacy interrupts and MSI.
*/
void esas2r_polled_interrupt(struct esas2r_adapter *a)
{
u32 intstat;
u32 doorbell;
esas2r_disable_chip_interrupts(a);
intstat = esas2r_read_register_dword(a, MU_INT_STATUS_OUT);
if (intstat & MU_INTSTAT_POST_OUT) {
/* clear the interrupt */
esas2r_write_register_dword(a, MU_OUT_LIST_INT_STAT,
MU_OLIS_INT);
esas2r_flush_register_dword(a, MU_OUT_LIST_INT_STAT);
esas2r_get_outbound_responses(a);
}
if (intstat & MU_INTSTAT_DRBL) {
doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
if (doorbell != 0)
esas2r_doorbell_interrupt(a, doorbell);
}
esas2r_enable_chip_interrupts(a);
if (atomic_read(&a->disable_cnt) == 0)
esas2r_do_deferred_processes(a);
}
/*
* Legacy and MSI interrupt handlers. Note that the legacy interrupt handler
* schedules a TASKLET to process events, whereas the MSI handler just
* processes interrupt events directly.
*/
irqreturn_t esas2r_interrupt(int irq, void *dev_id)
{
struct esas2r_adapter *a = (struct esas2r_adapter *)dev_id;
if (!esas2r_adapter_interrupt_pending(a))
return IRQ_NONE;
set_bit(AF2_INT_PENDING, &a->flags2);
esas2r_schedule_tasklet(a);
return IRQ_HANDLED;
}
void esas2r_adapter_interrupt(struct esas2r_adapter *a)
{
u32 doorbell;
if (likely(a->int_stat & MU_INTSTAT_POST_OUT)) {
/* clear the interrupt */
esas2r_write_register_dword(a, MU_OUT_LIST_INT_STAT,
MU_OLIS_INT);
esas2r_flush_register_dword(a, MU_OUT_LIST_INT_STAT);
esas2r_get_outbound_responses(a);
}
if (unlikely(a->int_stat & MU_INTSTAT_DRBL)) {
doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
if (doorbell != 0)
esas2r_doorbell_interrupt(a, doorbell);
}
a->int_mask = ESAS2R_INT_STS_MASK;
esas2r_enable_chip_interrupts(a);
if (likely(atomic_read(&a->disable_cnt) == 0))
esas2r_do_deferred_processes(a);
}
irqreturn_t esas2r_msi_interrupt(int irq, void *dev_id)
{
struct esas2r_adapter *a = (struct esas2r_adapter *)dev_id;
u32 intstat;
u32 doorbell;
intstat = esas2r_read_register_dword(a, MU_INT_STATUS_OUT);
if (likely(intstat & MU_INTSTAT_POST_OUT)) {
/* clear the interrupt */
esas2r_write_register_dword(a, MU_OUT_LIST_INT_STAT,
MU_OLIS_INT);
esas2r_flush_register_dword(a, MU_OUT_LIST_INT_STAT);
esas2r_get_outbound_responses(a);
}
if (unlikely(intstat & MU_INTSTAT_DRBL)) {
doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
if (doorbell != 0)
esas2r_doorbell_interrupt(a, doorbell);
}
/*
* Work around a chip bug and force a new MSI to be sent if one is
* still pending.
*/
esas2r_disable_chip_interrupts(a);
esas2r_enable_chip_interrupts(a);
if (likely(atomic_read(&a->disable_cnt) == 0))
esas2r_do_deferred_processes(a);
esas2r_do_tasklet_tasks(a);
return 1;
}
static void esas2r_handle_outbound_rsp_err(struct esas2r_adapter *a,
struct esas2r_request *rq,
struct atto_vda_ob_rsp *rsp)
{
/*
* For I/O requests, only copy the response if an error
* occurred and setup a callback to do error processing.
*/
if (unlikely(rq->req_stat != RS_SUCCESS)) {
memcpy(&rq->func_rsp, &rsp->func_rsp, sizeof(rsp->func_rsp));
if (rq->req_stat == RS_ABORTED) {
if (rq->timeout > RQ_MAX_TIMEOUT)
rq->req_stat = RS_TIMEOUT;
} else if (rq->req_stat == RS_SCSI_ERROR) {
u8 scsistatus = rq->func_rsp.scsi_rsp.scsi_stat;
esas2r_trace("scsistatus: %x", scsistatus);
/* Any of these are a good result. */
if (scsistatus == SAM_STAT_GOOD || scsistatus ==
SAM_STAT_CONDITION_MET || scsistatus ==
SAM_STAT_INTERMEDIATE || scsistatus ==
SAM_STAT_INTERMEDIATE_CONDITION_MET) {
rq->req_stat = RS_SUCCESS;
rq->func_rsp.scsi_rsp.scsi_stat =
SAM_STAT_GOOD;
}
}
}
}
static void esas2r_get_outbound_responses(struct esas2r_adapter *a)
{
struct atto_vda_ob_rsp *rsp;
u32 rspput_ptr;
u32 rspget_ptr;
struct esas2r_request *rq;
u32 handle;
unsigned long flags;
LIST_HEAD(comp_list);
esas2r_trace_enter();
spin_lock_irqsave(&a->queue_lock, flags);
/* Get the outbound limit and pointers */
rspput_ptr = le32_to_cpu(*a->outbound_copy) & MU_OLC_WRT_PTR;
rspget_ptr = a->last_read;
esas2r_trace("rspput_ptr: %x, rspget_ptr: %x", rspput_ptr, rspget_ptr);
/* If we don't have anything to process, get out */
if (unlikely(rspget_ptr == rspput_ptr)) {
spin_unlock_irqrestore(&a->queue_lock, flags);
esas2r_trace_exit();
return;
}
/* Make sure the firmware is healthy */
if (unlikely(rspput_ptr >= a->list_size)) {
spin_unlock_irqrestore(&a->queue_lock, flags);
esas2r_bugon();
esas2r_local_reset_adapter(a);
esas2r_trace_exit();
return;
}
do {
rspget_ptr++;
if (rspget_ptr >= a->list_size)
rspget_ptr = 0;
rsp = (struct atto_vda_ob_rsp *)a->outbound_list_md.virt_addr
+ rspget_ptr;
handle = rsp->handle;
/* Verify the handle range */
if (unlikely(LOWORD(handle) == 0
|| LOWORD(handle) > num_requests +
num_ae_requests + 1)) {
esas2r_bugon();
continue;
}
/* Get the request for this handle */
rq = a->req_table[LOWORD(handle)];
if (unlikely(rq == NULL || rq->vrq->scsi.handle != handle)) {
esas2r_bugon();
continue;
}
list_del(&rq->req_list);
/* Get the completion status */
rq->req_stat = rsp->req_stat;
esas2r_trace("handle: %x", handle);
esas2r_trace("rq: %p", rq);
esas2r_trace("req_status: %x", rq->req_stat);
if (likely(rq->vrq->scsi.function == VDA_FUNC_SCSI)) {
esas2r_handle_outbound_rsp_err(a, rq, rsp);
} else {
/*
* Copy the outbound completion struct for non-I/O
* requests.
*/
memcpy(&rq->func_rsp, &rsp->func_rsp,
sizeof(rsp->func_rsp));
}
/* Queue the request for completion. */
list_add_tail(&rq->comp_list, &comp_list);
} while (rspget_ptr != rspput_ptr);
a->last_read = rspget_ptr;
spin_unlock_irqrestore(&a->queue_lock, flags);
esas2r_comp_list_drain(a, &comp_list);
esas2r_trace_exit();
}
/*
* Perform all deferred processes for the adapter. Deferred
* processes can only be done while the current interrupt
* disable_cnt for the adapter is zero.
*/
void esas2r_do_deferred_processes(struct esas2r_adapter *a)
{
int startreqs = 2;
struct esas2r_request *rq;
unsigned long flags;
/*
* startreqs is used to control starting requests
* that are on the deferred queue
* = 0 - do not start any requests
* = 1 - can start discovery requests
* = 2 - can start any request
*/
if (test_bit(AF_CHPRST_PENDING, &a->flags) ||
test_bit(AF_FLASHING, &a->flags))
startreqs = 0;
else if (test_bit(AF_DISC_PENDING, &a->flags))
startreqs = 1;
atomic_inc(&a->disable_cnt);
/* Clear off the completed list to be processed later. */
if (esas2r_is_tasklet_pending(a)) {
esas2r_schedule_tasklet(a);
startreqs = 0;
}
/*
* If we can start requests then traverse the defer queue
* looking for requests to start or complete
*/
if (startreqs && !list_empty(&a->defer_list)) {
LIST_HEAD(comp_list);
struct list_head *element, *next;
spin_lock_irqsave(&a->queue_lock, flags);
list_for_each_safe(element, next, &a->defer_list) {
rq = list_entry(element, struct esas2r_request,
req_list);
if (rq->req_stat != RS_PENDING) {
list_del(element);
list_add_tail(&rq->comp_list, &comp_list);
}
/*
* Process discovery and OS requests separately. We
* can't hold up discovery requests when discovery is
* pending. In general, there may be different sets of
* conditions for starting different types of requests.
*/
else if (rq->req_type == RT_DISC_REQ) {
list_del(element);
esas2r_disc_local_start_request(a, rq);
} else if (startreqs == 2) {
list_del(element);
esas2r_local_start_request(a, rq);
/*
* Flashing could have been set by last local
* start
*/
if (test_bit(AF_FLASHING, &a->flags))
break;
}
}
spin_unlock_irqrestore(&a->queue_lock, flags);
esas2r_comp_list_drain(a, &comp_list);
}
atomic_dec(&a->disable_cnt);
}
/*
* Process an adapter reset (or one that is about to happen)
* by making sure all outstanding requests are completed that
* haven't been already.
*/
void esas2r_process_adapter_reset(struct esas2r_adapter *a)
{
struct esas2r_request *rq = &a->general_req;
unsigned long flags;
struct esas2r_disc_context *dc;
LIST_HEAD(comp_list);
struct list_head *element;
esas2r_trace_enter();
spin_lock_irqsave(&a->queue_lock, flags);
/* abort the active discovery, if any. */
if (rq->interrupt_cx) {
dc = (struct esas2r_disc_context *)rq->interrupt_cx;
dc->disc_evt = 0;
clear_bit(AF_DISC_IN_PROG, &a->flags);
}
/*
* just clear the interrupt callback for now. it will be dequeued if
* and when we find it on the active queue and we don't want the
* callback called. also set the dummy completion callback in case we
* were doing an I/O request.
*/
rq->interrupt_cx = NULL;
rq->interrupt_cb = NULL;
rq->comp_cb = esas2r_dummy_complete;
/* Reset the read and write pointers */
*a->outbound_copy =
a->last_write =
a->last_read = a->list_size - 1;
set_bit(AF_COMM_LIST_TOGGLE, &a->flags);
/* Kill all the requests on the active list */
list_for_each(element, &a->defer_list) {
rq = list_entry(element, struct esas2r_request, req_list);
if (rq->req_stat == RS_STARTED)
if (esas2r_ioreq_aborted(a, rq, RS_ABORTED))
list_add_tail(&rq->comp_list, &comp_list);
}
spin_unlock_irqrestore(&a->queue_lock, flags);
esas2r_comp_list_drain(a, &comp_list);
esas2r_process_bus_reset(a);
esas2r_trace_exit();
}
static void esas2r_process_bus_reset(struct esas2r_adapter *a)
{
struct esas2r_request *rq;
struct list_head *element;
unsigned long flags;
LIST_HEAD(comp_list);
esas2r_trace_enter();
esas2r_hdebug("reset detected");
spin_lock_irqsave(&a->queue_lock, flags);
/* kill all the requests on the deferred queue */
list_for_each(element, &a->defer_list) {
rq = list_entry(element, struct esas2r_request, req_list);
if (esas2r_ioreq_aborted(a, rq, RS_ABORTED))
list_add_tail(&rq->comp_list, &comp_list);
}
spin_unlock_irqrestore(&a->queue_lock, flags);
esas2r_comp_list_drain(a, &comp_list);
if (atomic_read(&a->disable_cnt) == 0)
esas2r_do_deferred_processes(a);
clear_bit(AF_OS_RESET, &a->flags);
esas2r_trace_exit();
}
static void esas2r_chip_rst_needed_during_tasklet(struct esas2r_adapter *a)
{
clear_bit(AF_CHPRST_NEEDED, &a->flags);
clear_bit(AF_BUSRST_NEEDED, &a->flags);
clear_bit(AF_BUSRST_DETECTED, &a->flags);
clear_bit(AF_BUSRST_PENDING, &a->flags);
/*
* Make sure we don't get attempt more than 3 resets
* when the uptime between resets does not exceed one
* minute. This will stop any situation where there is
* really something wrong with the hardware. The way
* this works is that we start with uptime ticks at 0.
* Each time we do a reset, we add 20 seconds worth to
* the count. Each time a timer tick occurs, as long
* as a chip reset is not pending, we decrement the
* tick count. If the uptime ticks ever gets to 60
* seconds worth, we disable the adapter from that
* point forward. Three strikes, you're out.
*/
if (!esas2r_is_adapter_present(a) || (a->chip_uptime >=
ESAS2R_CHP_UPTIME_MAX)) {
esas2r_hdebug("*** adapter disabled ***");
/*
* Ok, some kind of hard failure. Make sure we
* exit this loop with chip interrupts
* permanently disabled so we don't lock up the
* entire system. Also flag degraded mode to
* prevent the heartbeat from trying to recover.
*/
set_bit(AF_DEGRADED_MODE, &a->flags);
set_bit(AF_DISABLED, &a->flags);
clear_bit(AF_CHPRST_PENDING, &a->flags);
clear_bit(AF_DISC_PENDING, &a->flags);
esas2r_disable_chip_interrupts(a);
a->int_mask = 0;
esas2r_process_adapter_reset(a);
esas2r_log(ESAS2R_LOG_CRIT,
"Adapter disabled because of hardware failure");
} else {
bool alrdyrst = test_and_set_bit(AF_CHPRST_STARTED, &a->flags);
if (!alrdyrst)
/*
* Only disable interrupts if this is
* the first reset attempt.
*/
esas2r_disable_chip_interrupts(a);
if ((test_bit(AF_POWER_MGT, &a->flags)) &&
!test_bit(AF_FIRST_INIT, &a->flags) && !alrdyrst) {
/*
* Don't reset the chip on the first
* deferred power up attempt.
*/
} else {
esas2r_hdebug("*** resetting chip ***");
esas2r_reset_chip(a);
}
/* Kick off the reinitialization */
a->chip_uptime += ESAS2R_CHP_UPTIME_CNT;
a->chip_init_time = jiffies_to_msecs(jiffies);
if (!test_bit(AF_POWER_MGT, &a->flags)) {
esas2r_process_adapter_reset(a);
if (!alrdyrst) {
/* Remove devices now that I/O is cleaned up. */
a->prev_dev_cnt =
esas2r_targ_db_get_tgt_cnt(a);
esas2r_targ_db_remove_all(a, false);
}
}
a->int_mask = 0;
}
}
static void esas2r_handle_chip_rst_during_tasklet(struct esas2r_adapter *a)
{
while (test_bit(AF_CHPRST_DETECTED, &a->flags)) {
/*
* Balance the enable in esas2r_initadapter_hw.
* Esas2r_power_down already took care of it for power
* management.
*/
if (!test_bit(AF_DEGRADED_MODE, &a->flags) &&
!test_bit(AF_POWER_MGT, &a->flags))
esas2r_disable_chip_interrupts(a);
/* Reinitialize the chip. */
esas2r_check_adapter(a);
esas2r_init_adapter_hw(a, 0);
if (test_bit(AF_CHPRST_NEEDED, &a->flags))
break;
if (test_bit(AF_POWER_MGT, &a->flags)) {
/* Recovery from power management. */
if (test_bit(AF_FIRST_INIT, &a->flags)) {
/* Chip reset during normal power up */
esas2r_log(ESAS2R_LOG_CRIT,
"The firmware was reset during a normal power-up sequence");
} else {
/* Deferred power up complete. */
clear_bit(AF_POWER_MGT, &a->flags);
esas2r_send_reset_ae(a, true);
}
} else {
/* Recovery from online chip reset. */
if (test_bit(AF_FIRST_INIT, &a->flags)) {
/* Chip reset during driver load */
} else {
/* Chip reset after driver load */
esas2r_send_reset_ae(a, false);
}
esas2r_log(ESAS2R_LOG_CRIT,
"Recovering from a chip reset while the chip was online");
}
clear_bit(AF_CHPRST_STARTED, &a->flags);
esas2r_enable_chip_interrupts(a);
/*
* Clear this flag last! this indicates that the chip has been
* reset already during initialization.
*/
clear_bit(AF_CHPRST_DETECTED, &a->flags);
}
}
/* Perform deferred tasks when chip interrupts are disabled */
void esas2r_do_tasklet_tasks(struct esas2r_adapter *a)
{
if (test_bit(AF_CHPRST_NEEDED, &a->flags) ||
test_bit(AF_CHPRST_DETECTED, &a->flags)) {
if (test_bit(AF_CHPRST_NEEDED, &a->flags))
esas2r_chip_rst_needed_during_tasklet(a);
esas2r_handle_chip_rst_during_tasklet(a);
}
if (test_bit(AF_BUSRST_NEEDED, &a->flags)) {
esas2r_hdebug("hard resetting bus");
clear_bit(AF_BUSRST_NEEDED, &a->flags);
if (test_bit(AF_FLASHING, &a->flags))
set_bit(AF_BUSRST_DETECTED, &a->flags);
else
esas2r_write_register_dword(a, MU_DOORBELL_IN,
DRBL_RESET_BUS);
}
if (test_bit(AF_BUSRST_DETECTED, &a->flags)) {
esas2r_process_bus_reset(a);
esas2r_log_dev(ESAS2R_LOG_WARN,
&(a->host->shost_gendev),
"scsi_report_bus_reset() called");
scsi_report_bus_reset(a->host, 0);
clear_bit(AF_BUSRST_DETECTED, &a->flags);
clear_bit(AF_BUSRST_PENDING, &a->flags);
esas2r_log(ESAS2R_LOG_WARN, "Bus reset complete");
}
if (test_bit(AF_PORT_CHANGE, &a->flags)) {
clear_bit(AF_PORT_CHANGE, &a->flags);
esas2r_targ_db_report_changes(a);
}
if (atomic_read(&a->disable_cnt) == 0)
esas2r_do_deferred_processes(a);
}
static void esas2r_doorbell_interrupt(struct esas2r_adapter *a, u32 doorbell)
{
if (!(doorbell & DRBL_FORCE_INT)) {
esas2r_trace_enter();
esas2r_trace("doorbell: %x", doorbell);
}
/* First clear the doorbell bits */
esas2r_write_register_dword(a, MU_DOORBELL_OUT, doorbell);
if (doorbell & DRBL_RESET_BUS)
set_bit(AF_BUSRST_DETECTED, &a->flags);
if (doorbell & DRBL_FORCE_INT)
clear_bit(AF_HEARTBEAT, &a->flags);
if (doorbell & DRBL_PANIC_REASON_MASK) {
esas2r_hdebug("*** Firmware Panic ***");
esas2r_log(ESAS2R_LOG_CRIT, "The firmware has panicked");
}
if (doorbell & DRBL_FW_RESET) {
set_bit(AF2_COREDUMP_AVAIL, &a->flags2);
esas2r_local_reset_adapter(a);
}
if (!(doorbell & DRBL_FORCE_INT)) {
esas2r_trace_exit();
}
}
void esas2r_force_interrupt(struct esas2r_adapter *a)
{
esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_FORCE_INT |
DRBL_DRV_VER);
}
static void esas2r_lun_event(struct esas2r_adapter *a, union atto_vda_ae *ae,
u16 target, u32 length)
{
struct esas2r_target *t = a->targetdb + target;
u32 cplen = length;
unsigned long flags;
if (cplen > sizeof(t->lu_event))
cplen = sizeof(t->lu_event);
esas2r_trace("ae->lu.dwevent: %x", ae->lu.dwevent);
esas2r_trace("ae->lu.bystate: %x", ae->lu.bystate);
spin_lock_irqsave(&a->mem_lock, flags);
t->new_target_state = TS_INVALID;
if (ae->lu.dwevent & VDAAE_LU_LOST) {
t->new_target_state = TS_NOT_PRESENT;
} else {
switch (ae->lu.bystate) {
case VDAAE_LU_NOT_PRESENT:
case VDAAE_LU_OFFLINE:
case VDAAE_LU_DELETED:
case VDAAE_LU_FACTORY_DISABLED:
t->new_target_state = TS_NOT_PRESENT;
break;
case VDAAE_LU_ONLINE:
case VDAAE_LU_DEGRADED:
t->new_target_state = TS_PRESENT;
break;
}
}
if (t->new_target_state != TS_INVALID) {
memcpy(&t->lu_event, &ae->lu, cplen);
esas2r_disc_queue_event(a, DCDE_DEV_CHANGE);
}
spin_unlock_irqrestore(&a->mem_lock, flags);
}
void esas2r_ae_complete(struct esas2r_adapter *a, struct esas2r_request *rq)
{
union atto_vda_ae *ae =
(union atto_vda_ae *)rq->vda_rsp_data->ae_data.event_data;
u32 length = le32_to_cpu(rq->func_rsp.ae_rsp.length);
union atto_vda_ae *last =
(union atto_vda_ae *)(rq->vda_rsp_data->ae_data.event_data
+ length);
esas2r_trace_enter();
esas2r_trace("length: %d", length);
if (length > sizeof(struct atto_vda_ae_data)
|| (length & 3) != 0
|| length == 0) {
esas2r_log(ESAS2R_LOG_WARN,
"The AE request response length (%p) is too long: %d",
rq, length);
esas2r_hdebug("aereq->length (0x%x) too long", length);
esas2r_bugon();
last = ae;
}
while (ae < last) {
u16 target;
esas2r_trace("ae: %p", ae);
esas2r_trace("ae->hdr: %p", &(ae->hdr));
length = ae->hdr.bylength;
if (length > (u32)((u8 *)last - (u8 *)ae)
|| (length & 3) != 0
|| length == 0) {
esas2r_log(ESAS2R_LOG_CRIT,
"the async event length is invalid (%p): %d",
ae, length);
esas2r_hdebug("ae->hdr.length (0x%x) invalid", length);
esas2r_bugon();
break;
}
esas2r_nuxi_ae_data(ae);
esas2r_queue_fw_event(a, fw_event_vda_ae, ae,
sizeof(union atto_vda_ae));
switch (ae->hdr.bytype) {
case VDAAE_HDR_TYPE_RAID:
if (ae->raid.dwflags & (VDAAE_GROUP_STATE
| VDAAE_RBLD_STATE
| VDAAE_MEMBER_CHG
| VDAAE_PART_CHG)) {
esas2r_log(ESAS2R_LOG_INFO,
"RAID event received - name:%s rebuild_state:%d group_state:%d",
ae->raid.acname,
ae->raid.byrebuild_state,
ae->raid.bygroup_state);
}
break;
case VDAAE_HDR_TYPE_LU:
esas2r_log(ESAS2R_LOG_INFO,
"LUN event received: event:%d target_id:%d LUN:%d state:%d",
ae->lu.dwevent,
ae->lu.id.tgtlun.wtarget_id,
ae->lu.id.tgtlun.bylun,
ae->lu.bystate);
target = ae->lu.id.tgtlun.wtarget_id;
if (target < ESAS2R_MAX_TARGETS)
esas2r_lun_event(a, ae, target, length);
break;
case VDAAE_HDR_TYPE_DISK:
esas2r_log(ESAS2R_LOG_INFO, "Disk event received");
break;
default:
/* Silently ignore the rest and let the apps deal with
* them.
*/
break;
}
ae = (union atto_vda_ae *)((u8 *)ae + length);
}
/* Now requeue it. */
esas2r_start_ae_request(a, rq);
esas2r_trace_exit();
}
/* Send an asynchronous event for a chip reset or power management. */
void esas2r_send_reset_ae(struct esas2r_adapter *a, bool pwr_mgt)
{
struct atto_vda_ae_hdr ae;
if (pwr_mgt)
ae.bytype = VDAAE_HDR_TYPE_PWRMGT;
else
ae.bytype = VDAAE_HDR_TYPE_RESET;
ae.byversion = VDAAE_HDR_VER_0;
ae.byflags = 0;
ae.bylength = (u8)sizeof(struct atto_vda_ae_hdr);
if (pwr_mgt) {
esas2r_hdebug("*** sending power management AE ***");
} else {
esas2r_hdebug("*** sending reset AE ***");
}
esas2r_queue_fw_event(a, fw_event_vda_ae, &ae,
sizeof(union atto_vda_ae));
}
void esas2r_dummy_complete(struct esas2r_adapter *a, struct esas2r_request *rq)
{}
static void esas2r_check_req_rsp_sense(struct esas2r_adapter *a,
struct esas2r_request *rq)
{
u8 snslen, snslen2;
snslen = snslen2 = rq->func_rsp.scsi_rsp.sense_len;
if (snslen > rq->sense_len)
snslen = rq->sense_len;
if (snslen) {
if (rq->sense_buf)
memcpy(rq->sense_buf, rq->data_buf, snslen);
else
rq->sense_buf = (u8 *)rq->data_buf;
/* See about possible sense data */
if (snslen2 > 0x0c) {
u8 *s = (u8 *)rq->data_buf;
esas2r_trace_enter();
/* Report LUNS data has changed */
if (s[0x0c] == 0x3f && s[0x0d] == 0x0E) {
esas2r_trace("rq->target_id: %d",
rq->target_id);
esas2r_target_state_changed(a, rq->target_id,
TS_LUN_CHANGE);
}
esas2r_trace("add_sense_key=%x", s[0x0c]);
esas2r_trace("add_sense_qual=%x", s[0x0d]);
esas2r_trace_exit();
}
}
rq->sense_len = snslen;
}
void esas2r_complete_request(struct esas2r_adapter *a,
struct esas2r_request *rq)
{
if (rq->vrq->scsi.function == VDA_FUNC_FLASH
&& rq->vrq->flash.sub_func == VDA_FLASH_COMMIT)
clear_bit(AF_FLASHING, &a->flags);
/* See if we setup a callback to do special processing */
if (rq->interrupt_cb) {
(*rq->interrupt_cb)(a, rq);
if (rq->req_stat == RS_PENDING) {
esas2r_start_request(a, rq);
return;
}
}
if (likely(rq->vrq->scsi.function == VDA_FUNC_SCSI)
&& unlikely(rq->req_stat != RS_SUCCESS)) {
esas2r_check_req_rsp_sense(a, rq);
esas2r_log_request_failure(a, rq);
}
(*rq->comp_cb)(a, rq);
}