linux/drivers/scsi/esas2r/esas2r_targdb.c
Bradley Grove 9588d24e36 [SCSI] esas2r: Directly call kernel functions for atomic bit operations
Previously the code embedded the kernel's test_bit/clear_bit
functions in wrappers that accepted u32 parameters.  The
wrapper cast these parameters to longs before passing them
to the kernel's bit functions.   This did not work properly
on platforms with 64-bit longs.

Signed-off-by: Bradley Grove <bgrove@attotech.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-10-25 09:58:59 +01:00

307 lines
7.4 KiB
C

/*
* 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;
}