2013-08-23 22:35:45 +08:00
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/*
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* linux/drivers/scsi/esas2r/esas2r_targdb.c
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* For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
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*
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* Copyright (c) 2001-2013 ATTO Technology, Inc.
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* (mailto:linuxdrivers@attotech.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* NO WARRANTY
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* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
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* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
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* solely responsible for determining the appropriateness of using and
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* distributing the Program and assumes all risks associated with its
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* exercise of rights under this Agreement, including but not limited to
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* the risks and costs of program errors, damage to or loss of data,
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* programs or equipment, and unavailability or interruption of operations.
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*
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* DISCLAIMER OF LIABILITY
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* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
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* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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#include "esas2r.h"
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void esas2r_targ_db_initialize(struct esas2r_adapter *a)
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{
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struct esas2r_target *t;
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for (t = a->targetdb; t < a->targetdb_end; t++) {
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memset(t, 0, sizeof(struct esas2r_target));
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t->target_state = TS_NOT_PRESENT;
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t->buffered_target_state = TS_NOT_PRESENT;
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t->new_target_state = TS_INVALID;
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}
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}
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void esas2r_targ_db_remove_all(struct esas2r_adapter *a, bool notify)
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{
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struct esas2r_target *t;
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unsigned long flags;
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for (t = a->targetdb; t < a->targetdb_end; t++) {
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if (t->target_state != TS_PRESENT)
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continue;
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spin_lock_irqsave(&a->mem_lock, flags);
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esas2r_targ_db_remove(a, t);
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spin_unlock_irqrestore(&a->mem_lock, flags);
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if (notify) {
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esas2r_trace("remove id:%d", esas2r_targ_get_id(t,
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a));
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esas2r_target_state_changed(a, esas2r_targ_get_id(t,
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a),
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TS_NOT_PRESENT);
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}
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}
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}
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void esas2r_targ_db_report_changes(struct esas2r_adapter *a)
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{
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struct esas2r_target *t;
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unsigned long flags;
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esas2r_trace_enter();
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2013-10-02 02:26:01 +08:00
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if (test_bit(AF_DISC_PENDING, &a->flags)) {
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2013-08-23 22:35:45 +08:00
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esas2r_trace_exit();
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return;
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}
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for (t = a->targetdb; t < a->targetdb_end; t++) {
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u8 state = TS_INVALID;
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spin_lock_irqsave(&a->mem_lock, flags);
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if (t->buffered_target_state != t->target_state)
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state = t->buffered_target_state = t->target_state;
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spin_unlock_irqrestore(&a->mem_lock, flags);
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if (state != TS_INVALID) {
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esas2r_trace("targ_db_report_changes:%d",
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esas2r_targ_get_id(
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t,
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a));
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esas2r_trace("state:%d", state);
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esas2r_target_state_changed(a,
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esas2r_targ_get_id(t,
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a),
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state);
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}
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}
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esas2r_trace_exit();
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}
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struct esas2r_target *esas2r_targ_db_add_raid(struct esas2r_adapter *a,
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struct esas2r_disc_context *
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dc)
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{
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struct esas2r_target *t;
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esas2r_trace_enter();
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if (dc->curr_virt_id >= ESAS2R_MAX_TARGETS) {
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esas2r_bugon();
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esas2r_trace_exit();
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return NULL;
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}
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t = a->targetdb + dc->curr_virt_id;
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if (t->target_state == TS_PRESENT) {
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esas2r_trace_exit();
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return NULL;
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}
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esas2r_hdebug("add RAID %s, T:%d", dc->raid_grp_name,
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esas2r_targ_get_id(
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t,
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a));
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if (dc->interleave == 0
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|| dc->block_size == 0) {
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/* these are invalid values, don't create the target entry. */
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esas2r_hdebug("invalid RAID group dimensions");
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esas2r_trace_exit();
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return NULL;
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}
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t->block_size = dc->block_size;
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t->inter_byte = dc->interleave;
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t->inter_block = dc->interleave / dc->block_size;
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t->virt_targ_id = dc->curr_virt_id;
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t->phys_targ_id = ESAS2R_TARG_ID_INV;
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t->flags &= ~TF_PASS_THRU;
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t->flags |= TF_USED;
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t->identifier_len = 0;
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t->target_state = TS_PRESENT;
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return t;
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}
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struct esas2r_target *esas2r_targ_db_add_pthru(struct esas2r_adapter *a,
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struct esas2r_disc_context *dc,
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u8 *ident,
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u8 ident_len)
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{
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struct esas2r_target *t;
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esas2r_trace_enter();
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if (dc->curr_virt_id >= ESAS2R_MAX_TARGETS) {
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esas2r_bugon();
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esas2r_trace_exit();
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return NULL;
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}
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/* see if we found this device before. */
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t = esas2r_targ_db_find_by_ident(a, ident, ident_len);
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if (t == NULL) {
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t = a->targetdb + dc->curr_virt_id;
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if (ident_len > sizeof(t->identifier)
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|| t->target_state == TS_PRESENT) {
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esas2r_trace_exit();
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return NULL;
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}
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}
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esas2r_hdebug("add PT; T:%d, V:%d, P:%d", esas2r_targ_get_id(t, a),
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dc->curr_virt_id,
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dc->curr_phys_id);
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t->block_size = 0;
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t->inter_byte = 0;
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t->inter_block = 0;
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t->virt_targ_id = dc->curr_virt_id;
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t->phys_targ_id = dc->curr_phys_id;
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t->identifier_len = ident_len;
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memcpy(t->identifier, ident, ident_len);
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t->flags |= TF_PASS_THRU | TF_USED;
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t->target_state = TS_PRESENT;
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return t;
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}
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void esas2r_targ_db_remove(struct esas2r_adapter *a, struct esas2r_target *t)
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{
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esas2r_trace_enter();
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t->target_state = TS_NOT_PRESENT;
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esas2r_trace("remove id:%d", esas2r_targ_get_id(t, a));
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esas2r_trace_exit();
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}
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struct esas2r_target *esas2r_targ_db_find_by_sas_addr(struct esas2r_adapter *a,
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u64 *sas_addr)
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{
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struct esas2r_target *t;
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for (t = a->targetdb; t < a->targetdb_end; t++)
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if (t->sas_addr == *sas_addr)
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return t;
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return NULL;
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}
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struct esas2r_target *esas2r_targ_db_find_by_ident(struct esas2r_adapter *a,
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void *identifier,
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u8 ident_len)
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{
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struct esas2r_target *t;
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for (t = a->targetdb; t < a->targetdb_end; t++) {
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if (ident_len == t->identifier_len
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&& memcmp(&t->identifier[0], identifier,
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ident_len) == 0)
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return t;
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}
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return NULL;
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}
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u16 esas2r_targ_db_find_next_present(struct esas2r_adapter *a, u16 target_id)
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{
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u16 id = target_id + 1;
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while (id < ESAS2R_MAX_TARGETS) {
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struct esas2r_target *t = a->targetdb + id;
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if (t->target_state == TS_PRESENT)
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break;
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id++;
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}
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return id;
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}
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struct esas2r_target *esas2r_targ_db_find_by_virt_id(struct esas2r_adapter *a,
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u16 virt_id)
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{
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struct esas2r_target *t;
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for (t = a->targetdb; t < a->targetdb_end; t++) {
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if (t->target_state != TS_PRESENT)
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continue;
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if (t->virt_targ_id == virt_id)
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return t;
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}
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return NULL;
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}
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u16 esas2r_targ_db_get_tgt_cnt(struct esas2r_adapter *a)
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{
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u16 devcnt = 0;
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struct esas2r_target *t;
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unsigned long flags;
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spin_lock_irqsave(&a->mem_lock, flags);
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for (t = a->targetdb; t < a->targetdb_end; t++)
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if (t->target_state == TS_PRESENT)
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devcnt++;
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spin_unlock_irqrestore(&a->mem_lock, flags);
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return devcnt;
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}
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