/*
* linux/drivers/scsi/esas2r/esas2r_targdb.c
* For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
*
* Copyright (c) 2001-2013 ATTO Technology, Inc.
* (mailto:[email protected])
*
* 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
* of the License, 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.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include "esas2r.h"
void esas2r_targ_db_initialize(struct esas2r_adapter *a)
{
struct esas2r_target *t;
for (t = a->targetdb; t < a->targetdb_end; t++) {
memset(t, 0, sizeof(struct esas2r_target));
t->target_state = TS_NOT_PRESENT;
t->buffered_target_state = TS_NOT_PRESENT;
t->new_target_state = TS_INVALID;
}
}
void esas2r_targ_db_remove_all(struct esas2r_adapter *a, bool notify)
{
struct esas2r_target *t;
unsigned long flags;
for (t = a->targetdb; t < a->targetdb_end; t++) {
if (t->target_state != TS_PRESENT)
continue;
spin_lock_irqsave(&a->mem_lock, flags);
esas2r_targ_db_remove(a, t);
spin_unlock_irqrestore(&a->mem_lock, flags);
if (notify) {
esas2r_trace("remove id:%d", esas2r_targ_get_id(t,
a));
esas2r_target_state_changed(a, esas2r_targ_get_id(t,
a),
TS_NOT_PRESENT);
}
}
}
void esas2r_targ_db_report_changes(struct esas2r_adapter *a)
{
struct esas2r_target *t;
unsigned long flags;
esas2r_trace_enter();
if (test_bit(AF_DISC_PENDING, &a->flags)) {
esas2r_trace_exit();
return;
}
for (t = a->targetdb; t < a->targetdb_end; t++) {
u8 state = TS_INVALID;
spin_lock_irqsave(&a->mem_lock, flags);
if (t->buffered_target_state != t->target_state)
state = t->buffered_target_state = t->target_state;
spin_unlock_irqrestore(&a->mem_lock, flags);
if (state != TS_INVALID) {
esas2r_trace("targ_db_report_changes:%d",
esas2r_targ_get_id(
t,
a));
esas2r_trace("state:%d", state);
esas2r_target_state_changed(a,
esas2r_targ_get_id(t,
a),
state);
}
}
esas2r_trace_exit();
}
struct esas2r_target *esas2r_targ_db_add_raid(struct esas2r_adapter *a,
struct esas2r_disc_context *
dc)
{
struct esas2r_target *t;
esas2r_trace_enter();
if (dc->curr_virt_id >= ESAS2R_MAX_TARGETS) {
esas2r_bugon();
esas2r_trace_exit();
return NULL;
}
t = a->targetdb + dc->curr_virt_id;
if (t->target_state == TS_PRESENT) {
esas2r_trace_exit();
return NULL;
}
esas2r_hdebug("add RAID %s, T:%d", dc->raid_grp_name,
esas2r_targ_get_id(
t,
a));
if (dc->interleave == 0
|| dc->block_size == 0) {
/* these are invalid values, don't create the target entry. */
esas2r_hdebug("invalid RAID group dimensions");
esas2r_trace_exit();
return NULL;
}
t->block_size = dc->block_size;
t->inter_byte = dc->interleave;
t->inter_block = dc->interleave / dc->block_size;
t->virt_targ_id = dc->curr_virt_id;
t->phys_targ_id = ESAS2R_TARG_ID_INV;
t->flags &= ~TF_PASS_THRU;
t->flags |= TF_USED;
t->identifier_len = 0;
t->target_state = TS_PRESENT;
return t;
}
struct esas2r_target *esas2r_targ_db_add_pthru(struct esas2r_adapter *a,
struct esas2r_disc_context *dc,
u8 *ident,
u8 ident_len)
{
struct esas2r_target *t;
esas2r_trace_enter();
if (dc->curr_virt_id >= ESAS2R_MAX_TARGETS) {
esas2r_bugon();
esas2r_trace_exit();
return NULL;
}
/* see if we found this device before. */
t = esas2r_targ_db_find_by_ident(a, ident, ident_len);
if (t == NULL) {
t = a->targetdb + dc->curr_virt_id;
if (ident_len > sizeof(t->identifier)
|| t->target_state == TS_PRESENT) {
esas2r_trace_exit();
return NULL;
}
}
esas2r_hdebug("add PT; T:%d, V:%d, P:%d", esas2r_targ_get_id(t, a),
dc->curr_virt_id,
dc->curr_phys_id);
t->block_size = 0;
t->inter_byte = 0;
t->inter_block = 0;
t->virt_targ_id = dc->curr_virt_id;
t->phys_targ_id = dc->curr_phys_id;
t->identifier_len = ident_len;
memcpy(t->identifier, ident, ident_len);
t->flags |= TF_PASS_THRU | TF_USED;
t->target_state = TS_PRESENT;
return t;
}
void esas2r_targ_db_remove(struct esas2r_adapter *a, struct esas2r_target *t)
{
esas2r_trace_enter();
t->target_state = TS_NOT_PRESENT;
esas2r_trace("remove id:%d", esas2r_targ_get_id(t, a));
esas2r_trace_exit();
}
struct esas2r_target *esas2r_targ_db_find_by_sas_addr(struct esas2r_adapter *a,
u64 *sas_addr)
{
struct esas2r_target *t;
for (t = a->targetdb; t < a->targetdb_end; t++)
if (t->sas_addr == *sas_addr)
return t;
return NULL;
}
struct esas2r_target *esas2r_targ_db_find_by_ident(struct esas2r_adapter *a,
void *identifier,
u8 ident_len)
{
struct esas2r_target *t;
for (t = a->targetdb; t < a->targetdb_end; t++) {
if (ident_len == t->identifier_len
&& memcmp(&t->identifier[0], identifier,
ident_len) == 0)
return t;
}
return NULL;
}
u16 esas2r_targ_db_find_next_present(struct esas2r_adapter *a, u16 target_id)
{
u16 id = target_id + 1;
while (id < ESAS2R_MAX_TARGETS) {
struct esas2r_target *t = a->targetdb + id;
if (t->target_state == TS_PRESENT)
break;
id++;
}
return id;
}
struct esas2r_target *esas2r_targ_db_find_by_virt_id(struct esas2r_adapter *a,
u16 virt_id)
{
struct esas2r_target *t;
for (t = a->targetdb; t < a->targetdb_end; t++) {
if (t->target_state != TS_PRESENT)
continue;
if (t->virt_targ_id == virt_id)
return t;
}
return NULL;
}
u16 esas2r_targ_db_get_tgt_cnt(struct esas2r_adapter *a)
{
u16 devcnt = 0;
struct esas2r_target *t;
unsigned long flags;
spin_lock_irqsave(&a->mem_lock, flags);
for (t = a->targetdb; t < a->targetdb_end; t++)
if (t->target_state == TS_PRESENT)
devcnt++;
spin_unlock_irqrestore(&a->mem_lock, flags);
return devcnt;
}
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