--- /dev/null
+/*
+ * 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: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; 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;
+}
Code Review / kvmfornfv.git / blobdiff