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9a5cf98d7e
Fixes the following W=1 kernel build warning(s): drivers/scsi/esas2r/esas2r_disc.c: In function ‘esas2r_disc_get_phys_addr’: drivers/scsi/esas2r/esas2r_disc.c:1035:17: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body] Link: https://lore.kernel.org/r/20201102142359.561122-9-lee.jones@linaro.org Cc: Bradley Grove <linuxdrivers@attotech.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
1186 lines
29 KiB
C
1186 lines
29 KiB
C
/*
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* linux/drivers/scsi/esas2r/esas2r_disc.c
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* esas2r device discovery routines
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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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/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
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#include "esas2r.h"
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/* Miscellaneous internal discovery routines */
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static void esas2r_disc_abort(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static bool esas2r_disc_continue(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static void esas2r_disc_fix_curr_requests(struct esas2r_adapter *a);
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static u32 esas2r_disc_get_phys_addr(struct esas2r_sg_context *sgc, u64 *addr);
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static bool esas2r_disc_start_request(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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/* Internal discovery routines that process the states */
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static bool esas2r_disc_block_dev_scan(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static void esas2r_disc_block_dev_scan_cb(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static bool esas2r_disc_dev_add(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static bool esas2r_disc_dev_remove(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static bool esas2r_disc_part_info(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static void esas2r_disc_part_info_cb(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static bool esas2r_disc_passthru_dev_info(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static void esas2r_disc_passthru_dev_info_cb(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static bool esas2r_disc_passthru_dev_addr(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static void esas2r_disc_passthru_dev_addr_cb(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static bool esas2r_disc_raid_grp_info(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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static void esas2r_disc_raid_grp_info_cb(struct esas2r_adapter *a,
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struct esas2r_request *rq);
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void esas2r_disc_initialize(struct esas2r_adapter *a)
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{
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struct esas2r_sas_nvram *nvr = a->nvram;
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esas2r_trace_enter();
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clear_bit(AF_DISC_IN_PROG, &a->flags);
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clear_bit(AF2_DEV_SCAN, &a->flags2);
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clear_bit(AF2_DEV_CNT_OK, &a->flags2);
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a->disc_start_time = jiffies_to_msecs(jiffies);
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a->disc_wait_time = nvr->dev_wait_time * 1000;
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a->disc_wait_cnt = nvr->dev_wait_count;
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if (a->disc_wait_cnt > ESAS2R_MAX_TARGETS)
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a->disc_wait_cnt = ESAS2R_MAX_TARGETS;
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/*
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* If we are doing chip reset or power management processing, always
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* wait for devices. use the NVRAM device count if it is greater than
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* previously discovered devices.
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*/
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esas2r_hdebug("starting discovery...");
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a->general_req.interrupt_cx = NULL;
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if (test_bit(AF_CHPRST_DETECTED, &a->flags) ||
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test_bit(AF_POWER_MGT, &a->flags)) {
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if (a->prev_dev_cnt == 0) {
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/* Don't bother waiting if there is nothing to wait
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* for.
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*/
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a->disc_wait_time = 0;
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} else {
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/*
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* Set the device wait count to what was previously
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* found. We don't care if the user only configured
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* a time because we know the exact count to wait for.
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* There is no need to honor the user's wishes to
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* always wait the full time.
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*/
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a->disc_wait_cnt = a->prev_dev_cnt;
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/*
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* bump the minimum wait time to 15 seconds since the
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* default is 3 (system boot or the boot driver usually
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* buys us more time).
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*/
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if (a->disc_wait_time < 15000)
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a->disc_wait_time = 15000;
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}
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}
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esas2r_trace("disc wait count: %d", a->disc_wait_cnt);
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esas2r_trace("disc wait time: %d", a->disc_wait_time);
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if (a->disc_wait_time == 0)
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esas2r_disc_check_complete(a);
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esas2r_trace_exit();
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}
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void esas2r_disc_start_waiting(struct esas2r_adapter *a)
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{
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unsigned long flags;
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spin_lock_irqsave(&a->mem_lock, flags);
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if (a->disc_ctx.disc_evt)
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esas2r_disc_start_port(a);
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spin_unlock_irqrestore(&a->mem_lock, flags);
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}
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void esas2r_disc_check_for_work(struct esas2r_adapter *a)
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{
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struct esas2r_request *rq = &a->general_req;
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/* service any pending interrupts first */
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esas2r_polled_interrupt(a);
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/*
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* now, interrupt processing may have queued up a discovery event. go
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* see if we have one to start. we couldn't start it in the ISR since
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* polled discovery would cause a deadlock.
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*/
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esas2r_disc_start_waiting(a);
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if (rq->interrupt_cx == NULL)
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return;
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if (rq->req_stat == RS_STARTED
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&& rq->timeout <= RQ_MAX_TIMEOUT) {
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/* wait for the current discovery request to complete. */
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esas2r_wait_request(a, rq);
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if (rq->req_stat == RS_TIMEOUT) {
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esas2r_disc_abort(a, rq);
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esas2r_local_reset_adapter(a);
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return;
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}
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}
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if (rq->req_stat == RS_PENDING
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|| rq->req_stat == RS_STARTED)
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return;
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esas2r_disc_continue(a, rq);
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}
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void esas2r_disc_check_complete(struct esas2r_adapter *a)
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{
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unsigned long flags;
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esas2r_trace_enter();
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/* check to see if we should be waiting for devices */
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if (a->disc_wait_time) {
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u32 currtime = jiffies_to_msecs(jiffies);
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u32 time = currtime - a->disc_start_time;
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/*
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* Wait until the device wait time is exhausted or the device
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* wait count is satisfied.
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*/
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if (time < a->disc_wait_time
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&& (esas2r_targ_db_get_tgt_cnt(a) < a->disc_wait_cnt
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|| a->disc_wait_cnt == 0)) {
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/* After three seconds of waiting, schedule a scan. */
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if (time >= 3000
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&& !test_and_set_bit(AF2_DEV_SCAN, &a->flags2)) {
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spin_lock_irqsave(&a->mem_lock, flags);
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esas2r_disc_queue_event(a, DCDE_DEV_SCAN);
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spin_unlock_irqrestore(&a->mem_lock, flags);
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}
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esas2r_trace_exit();
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return;
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}
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/*
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* We are done waiting...we think. Adjust the wait time to
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* consume events after the count is met.
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*/
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if (!test_and_set_bit(AF2_DEV_CNT_OK, &a->flags2))
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a->disc_wait_time = time + 3000;
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/* If we haven't done a full scan yet, do it now. */
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if (!test_and_set_bit(AF2_DEV_SCAN, &a->flags2)) {
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spin_lock_irqsave(&a->mem_lock, flags);
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esas2r_disc_queue_event(a, DCDE_DEV_SCAN);
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spin_unlock_irqrestore(&a->mem_lock, flags);
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esas2r_trace_exit();
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return;
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}
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/*
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* Now, if there is still time left to consume events, continue
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* waiting.
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*/
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if (time < a->disc_wait_time) {
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esas2r_trace_exit();
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return;
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}
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} else {
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if (!test_and_set_bit(AF2_DEV_SCAN, &a->flags2)) {
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spin_lock_irqsave(&a->mem_lock, flags);
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esas2r_disc_queue_event(a, DCDE_DEV_SCAN);
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spin_unlock_irqrestore(&a->mem_lock, flags);
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}
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}
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/* We want to stop waiting for devices. */
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a->disc_wait_time = 0;
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if (test_bit(AF_DISC_POLLED, &a->flags) &&
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test_bit(AF_DISC_IN_PROG, &a->flags)) {
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/*
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* Polled discovery is still pending so continue the active
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* discovery until it is done. At that point, we will stop
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* polled discovery and transition to interrupt driven
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* discovery.
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*/
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} else {
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/*
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* Done waiting for devices. Note that we get here immediately
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* after deferred waiting completes because that is interrupt
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* driven; i.e. There is no transition.
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*/
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esas2r_disc_fix_curr_requests(a);
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clear_bit(AF_DISC_PENDING, &a->flags);
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/*
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* We have deferred target state changes until now because we
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* don't want to report any removals (due to the first arrival)
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* until the device wait time expires.
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*/
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set_bit(AF_PORT_CHANGE, &a->flags);
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}
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esas2r_trace_exit();
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}
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void esas2r_disc_queue_event(struct esas2r_adapter *a, u8 disc_evt)
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{
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struct esas2r_disc_context *dc = &a->disc_ctx;
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esas2r_trace_enter();
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esas2r_trace("disc_event: %d", disc_evt);
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/* Initialize the discovery context */
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dc->disc_evt |= disc_evt;
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/*
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* Don't start discovery before or during polled discovery. if we did,
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* we would have a deadlock if we are in the ISR already.
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*/
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if (!test_bit(AF_CHPRST_PENDING, &a->flags) &&
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!test_bit(AF_DISC_POLLED, &a->flags))
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esas2r_disc_start_port(a);
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esas2r_trace_exit();
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}
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bool esas2r_disc_start_port(struct esas2r_adapter *a)
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{
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struct esas2r_request *rq = &a->general_req;
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struct esas2r_disc_context *dc = &a->disc_ctx;
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bool ret;
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esas2r_trace_enter();
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if (test_bit(AF_DISC_IN_PROG, &a->flags)) {
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esas2r_trace_exit();
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return false;
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}
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/* If there is a discovery waiting, process it. */
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if (dc->disc_evt) {
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if (test_bit(AF_DISC_POLLED, &a->flags)
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&& a->disc_wait_time == 0) {
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/*
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* We are doing polled discovery, but we no longer want
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* to wait for devices. Stop polled discovery and
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* transition to interrupt driven discovery.
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*/
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esas2r_trace_exit();
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return false;
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}
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} else {
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/* Discovery is complete. */
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esas2r_hdebug("disc done");
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set_bit(AF_PORT_CHANGE, &a->flags);
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esas2r_trace_exit();
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return false;
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}
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/* Handle the discovery context */
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esas2r_trace("disc_evt: %d", dc->disc_evt);
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set_bit(AF_DISC_IN_PROG, &a->flags);
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dc->flags = 0;
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if (test_bit(AF_DISC_POLLED, &a->flags))
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dc->flags |= DCF_POLLED;
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rq->interrupt_cx = dc;
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rq->req_stat = RS_SUCCESS;
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/* Decode the event code */
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if (dc->disc_evt & DCDE_DEV_SCAN) {
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dc->disc_evt &= ~DCDE_DEV_SCAN;
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dc->flags |= DCF_DEV_SCAN;
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dc->state = DCS_BLOCK_DEV_SCAN;
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} else if (dc->disc_evt & DCDE_DEV_CHANGE) {
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dc->disc_evt &= ~DCDE_DEV_CHANGE;
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dc->flags |= DCF_DEV_CHANGE;
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dc->state = DCS_DEV_RMV;
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}
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/* Continue interrupt driven discovery */
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if (!test_bit(AF_DISC_POLLED, &a->flags))
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ret = esas2r_disc_continue(a, rq);
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else
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ret = true;
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esas2r_trace_exit();
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return ret;
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}
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static bool esas2r_disc_continue(struct esas2r_adapter *a,
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struct esas2r_request *rq)
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{
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struct esas2r_disc_context *dc =
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(struct esas2r_disc_context *)rq->interrupt_cx;
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bool rslt;
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/* Device discovery/removal */
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while (dc->flags & (DCF_DEV_CHANGE | DCF_DEV_SCAN)) {
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rslt = false;
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switch (dc->state) {
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case DCS_DEV_RMV:
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rslt = esas2r_disc_dev_remove(a, rq);
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break;
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case DCS_DEV_ADD:
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rslt = esas2r_disc_dev_add(a, rq);
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break;
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case DCS_BLOCK_DEV_SCAN:
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rslt = esas2r_disc_block_dev_scan(a, rq);
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break;
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case DCS_RAID_GRP_INFO:
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rslt = esas2r_disc_raid_grp_info(a, rq);
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break;
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case DCS_PART_INFO:
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rslt = esas2r_disc_part_info(a, rq);
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break;
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case DCS_PT_DEV_INFO:
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rslt = esas2r_disc_passthru_dev_info(a, rq);
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break;
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case DCS_PT_DEV_ADDR:
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rslt = esas2r_disc_passthru_dev_addr(a, rq);
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break;
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case DCS_DISC_DONE:
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dc->flags &= ~(DCF_DEV_CHANGE | DCF_DEV_SCAN);
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break;
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default:
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esas2r_bugon();
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dc->state = DCS_DISC_DONE;
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break;
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}
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if (rslt)
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return true;
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}
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|
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/* Discovery is done...for now. */
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rq->interrupt_cx = NULL;
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|
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if (!test_bit(AF_DISC_PENDING, &a->flags))
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esas2r_disc_fix_curr_requests(a);
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clear_bit(AF_DISC_IN_PROG, &a->flags);
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|
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/* Start the next discovery. */
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return esas2r_disc_start_port(a);
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}
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|
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static bool esas2r_disc_start_request(struct esas2r_adapter *a,
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struct esas2r_request *rq)
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{
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unsigned long flags;
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|
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/* Set the timeout to a minimum value. */
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if (rq->timeout < ESAS2R_DEFAULT_TMO)
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rq->timeout = ESAS2R_DEFAULT_TMO;
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|
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/*
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* Override the request type to distinguish discovery requests. If we
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* end up deferring the request, esas2r_disc_local_start_request()
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* will be called to restart it.
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*/
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rq->req_type = RT_DISC_REQ;
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spin_lock_irqsave(&a->queue_lock, flags);
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if (!test_bit(AF_CHPRST_PENDING, &a->flags) &&
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!test_bit(AF_FLASHING, &a->flags))
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esas2r_disc_local_start_request(a, rq);
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else
|
|
list_add_tail(&rq->req_list, &a->defer_list);
|
|
|
|
spin_unlock_irqrestore(&a->queue_lock, flags);
|
|
|
|
return true;
|
|
}
|
|
|
|
void esas2r_disc_local_start_request(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
esas2r_trace_enter();
|
|
|
|
list_add_tail(&rq->req_list, &a->active_list);
|
|
|
|
esas2r_start_vda_request(a, rq);
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return;
|
|
}
|
|
|
|
static void esas2r_disc_abort(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
/* abort the current discovery */
|
|
|
|
dc->state = DCS_DISC_DONE;
|
|
|
|
esas2r_trace_exit();
|
|
}
|
|
|
|
static bool esas2r_disc_block_dev_scan(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
bool rslt;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
esas2r_rq_init_request(rq, a);
|
|
|
|
esas2r_build_mgt_req(a,
|
|
rq,
|
|
VDAMGT_DEV_SCAN,
|
|
0,
|
|
0,
|
|
0,
|
|
NULL);
|
|
|
|
rq->comp_cb = esas2r_disc_block_dev_scan_cb;
|
|
|
|
rq->timeout = 30000;
|
|
rq->interrupt_cx = dc;
|
|
|
|
rslt = esas2r_disc_start_request(a, rq);
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return rslt;
|
|
}
|
|
|
|
static void esas2r_disc_block_dev_scan_cb(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
unsigned long flags;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
spin_lock_irqsave(&a->mem_lock, flags);
|
|
|
|
if (rq->req_stat == RS_SUCCESS)
|
|
dc->scan_gen = rq->func_rsp.mgt_rsp.scan_generation;
|
|
|
|
dc->state = DCS_RAID_GRP_INFO;
|
|
dc->raid_grp_ix = 0;
|
|
|
|
esas2r_rq_destroy_request(rq, a);
|
|
|
|
/* continue discovery if it's interrupt driven */
|
|
|
|
if (!(dc->flags & DCF_POLLED))
|
|
esas2r_disc_continue(a, rq);
|
|
|
|
spin_unlock_irqrestore(&a->mem_lock, flags);
|
|
|
|
esas2r_trace_exit();
|
|
}
|
|
|
|
static bool esas2r_disc_raid_grp_info(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
bool rslt;
|
|
struct atto_vda_grp_info *grpinfo;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
esas2r_trace("raid_group_idx: %d", dc->raid_grp_ix);
|
|
|
|
if (dc->raid_grp_ix >= VDA_MAX_RAID_GROUPS) {
|
|
dc->state = DCS_DISC_DONE;
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return false;
|
|
}
|
|
|
|
esas2r_rq_init_request(rq, a);
|
|
|
|
grpinfo = &rq->vda_rsp_data->mgt_data.data.grp_info;
|
|
|
|
memset(grpinfo, 0, sizeof(struct atto_vda_grp_info));
|
|
|
|
esas2r_build_mgt_req(a,
|
|
rq,
|
|
VDAMGT_GRP_INFO,
|
|
dc->scan_gen,
|
|
0,
|
|
sizeof(struct atto_vda_grp_info),
|
|
NULL);
|
|
|
|
grpinfo->grp_index = dc->raid_grp_ix;
|
|
|
|
rq->comp_cb = esas2r_disc_raid_grp_info_cb;
|
|
|
|
rq->interrupt_cx = dc;
|
|
|
|
rslt = esas2r_disc_start_request(a, rq);
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return rslt;
|
|
}
|
|
|
|
static void esas2r_disc_raid_grp_info_cb(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
unsigned long flags;
|
|
struct atto_vda_grp_info *grpinfo;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
spin_lock_irqsave(&a->mem_lock, flags);
|
|
|
|
if (rq->req_stat == RS_SCAN_GEN) {
|
|
dc->scan_gen = rq->func_rsp.mgt_rsp.scan_generation;
|
|
dc->raid_grp_ix = 0;
|
|
goto done;
|
|
}
|
|
|
|
if (rq->req_stat == RS_SUCCESS) {
|
|
grpinfo = &rq->vda_rsp_data->mgt_data.data.grp_info;
|
|
|
|
if (grpinfo->status != VDA_GRP_STAT_ONLINE
|
|
&& grpinfo->status != VDA_GRP_STAT_DEGRADED) {
|
|
/* go to the next group. */
|
|
|
|
dc->raid_grp_ix++;
|
|
} else {
|
|
memcpy(&dc->raid_grp_name[0],
|
|
&grpinfo->grp_name[0],
|
|
sizeof(grpinfo->grp_name));
|
|
|
|
dc->interleave = le32_to_cpu(grpinfo->interleave);
|
|
dc->block_size = le32_to_cpu(grpinfo->block_size);
|
|
|
|
dc->state = DCS_PART_INFO;
|
|
dc->part_num = 0;
|
|
}
|
|
} else {
|
|
if (!(rq->req_stat == RS_GRP_INVALID)) {
|
|
esas2r_log(ESAS2R_LOG_WARN,
|
|
"A request for RAID group info failed - "
|
|
"returned with %x",
|
|
rq->req_stat);
|
|
}
|
|
|
|
dc->dev_ix = 0;
|
|
dc->state = DCS_PT_DEV_INFO;
|
|
}
|
|
|
|
done:
|
|
|
|
esas2r_rq_destroy_request(rq, a);
|
|
|
|
/* continue discovery if it's interrupt driven */
|
|
|
|
if (!(dc->flags & DCF_POLLED))
|
|
esas2r_disc_continue(a, rq);
|
|
|
|
spin_unlock_irqrestore(&a->mem_lock, flags);
|
|
|
|
esas2r_trace_exit();
|
|
}
|
|
|
|
static bool esas2r_disc_part_info(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
bool rslt;
|
|
struct atto_vdapart_info *partinfo;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
esas2r_trace("part_num: %d", dc->part_num);
|
|
|
|
if (dc->part_num >= VDA_MAX_PARTITIONS) {
|
|
dc->state = DCS_RAID_GRP_INFO;
|
|
dc->raid_grp_ix++;
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return false;
|
|
}
|
|
|
|
esas2r_rq_init_request(rq, a);
|
|
|
|
partinfo = &rq->vda_rsp_data->mgt_data.data.part_info;
|
|
|
|
memset(partinfo, 0, sizeof(struct atto_vdapart_info));
|
|
|
|
esas2r_build_mgt_req(a,
|
|
rq,
|
|
VDAMGT_PART_INFO,
|
|
dc->scan_gen,
|
|
0,
|
|
sizeof(struct atto_vdapart_info),
|
|
NULL);
|
|
|
|
partinfo->part_no = dc->part_num;
|
|
|
|
memcpy(&partinfo->grp_name[0],
|
|
&dc->raid_grp_name[0],
|
|
sizeof(partinfo->grp_name));
|
|
|
|
rq->comp_cb = esas2r_disc_part_info_cb;
|
|
|
|
rq->interrupt_cx = dc;
|
|
|
|
rslt = esas2r_disc_start_request(a, rq);
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return rslt;
|
|
}
|
|
|
|
static void esas2r_disc_part_info_cb(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
unsigned long flags;
|
|
struct atto_vdapart_info *partinfo;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
spin_lock_irqsave(&a->mem_lock, flags);
|
|
|
|
if (rq->req_stat == RS_SCAN_GEN) {
|
|
dc->scan_gen = rq->func_rsp.mgt_rsp.scan_generation;
|
|
dc->raid_grp_ix = 0;
|
|
dc->state = DCS_RAID_GRP_INFO;
|
|
} else if (rq->req_stat == RS_SUCCESS) {
|
|
partinfo = &rq->vda_rsp_data->mgt_data.data.part_info;
|
|
|
|
dc->part_num = partinfo->part_no;
|
|
|
|
dc->curr_virt_id = le16_to_cpu(partinfo->target_id);
|
|
|
|
esas2r_targ_db_add_raid(a, dc);
|
|
|
|
dc->part_num++;
|
|
} else {
|
|
if (!(rq->req_stat == RS_PART_LAST)) {
|
|
esas2r_log(ESAS2R_LOG_WARN,
|
|
"A request for RAID group partition info "
|
|
"failed - status:%d", rq->req_stat);
|
|
}
|
|
|
|
dc->state = DCS_RAID_GRP_INFO;
|
|
dc->raid_grp_ix++;
|
|
}
|
|
|
|
esas2r_rq_destroy_request(rq, a);
|
|
|
|
/* continue discovery if it's interrupt driven */
|
|
|
|
if (!(dc->flags & DCF_POLLED))
|
|
esas2r_disc_continue(a, rq);
|
|
|
|
spin_unlock_irqrestore(&a->mem_lock, flags);
|
|
|
|
esas2r_trace_exit();
|
|
}
|
|
|
|
static bool esas2r_disc_passthru_dev_info(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
bool rslt;
|
|
struct atto_vda_devinfo *devinfo;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
esas2r_trace("dev_ix: %d", dc->dev_ix);
|
|
|
|
esas2r_rq_init_request(rq, a);
|
|
|
|
devinfo = &rq->vda_rsp_data->mgt_data.data.dev_info;
|
|
|
|
memset(devinfo, 0, sizeof(struct atto_vda_devinfo));
|
|
|
|
esas2r_build_mgt_req(a,
|
|
rq,
|
|
VDAMGT_DEV_PT_INFO,
|
|
dc->scan_gen,
|
|
dc->dev_ix,
|
|
sizeof(struct atto_vda_devinfo),
|
|
NULL);
|
|
|
|
rq->comp_cb = esas2r_disc_passthru_dev_info_cb;
|
|
|
|
rq->interrupt_cx = dc;
|
|
|
|
rslt = esas2r_disc_start_request(a, rq);
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return rslt;
|
|
}
|
|
|
|
static void esas2r_disc_passthru_dev_info_cb(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
unsigned long flags;
|
|
struct atto_vda_devinfo *devinfo;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
spin_lock_irqsave(&a->mem_lock, flags);
|
|
|
|
if (rq->req_stat == RS_SCAN_GEN) {
|
|
dc->scan_gen = rq->func_rsp.mgt_rsp.scan_generation;
|
|
dc->dev_ix = 0;
|
|
dc->state = DCS_PT_DEV_INFO;
|
|
} else if (rq->req_stat == RS_SUCCESS) {
|
|
devinfo = &rq->vda_rsp_data->mgt_data.data.dev_info;
|
|
|
|
dc->dev_ix = le16_to_cpu(rq->func_rsp.mgt_rsp.dev_index);
|
|
|
|
dc->curr_virt_id = le16_to_cpu(devinfo->target_id);
|
|
|
|
if (le16_to_cpu(devinfo->features) & VDADEVFEAT_PHYS_ID) {
|
|
dc->curr_phys_id =
|
|
le16_to_cpu(devinfo->phys_target_id);
|
|
dc->dev_addr_type = ATTO_GDA_AT_PORT;
|
|
dc->state = DCS_PT_DEV_ADDR;
|
|
|
|
esas2r_trace("curr_virt_id: %d", dc->curr_virt_id);
|
|
esas2r_trace("curr_phys_id: %d", dc->curr_phys_id);
|
|
} else {
|
|
dc->dev_ix++;
|
|
}
|
|
} else {
|
|
if (!(rq->req_stat == RS_DEV_INVALID)) {
|
|
esas2r_log(ESAS2R_LOG_WARN,
|
|
"A request for device information failed - "
|
|
"status:%d", rq->req_stat);
|
|
}
|
|
|
|
dc->state = DCS_DISC_DONE;
|
|
}
|
|
|
|
esas2r_rq_destroy_request(rq, a);
|
|
|
|
/* continue discovery if it's interrupt driven */
|
|
|
|
if (!(dc->flags & DCF_POLLED))
|
|
esas2r_disc_continue(a, rq);
|
|
|
|
spin_unlock_irqrestore(&a->mem_lock, flags);
|
|
|
|
esas2r_trace_exit();
|
|
}
|
|
|
|
static bool esas2r_disc_passthru_dev_addr(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
bool rslt;
|
|
struct atto_ioctl *hi;
|
|
struct esas2r_sg_context sgc;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
esas2r_rq_init_request(rq, a);
|
|
|
|
/* format the request. */
|
|
|
|
sgc.cur_offset = NULL;
|
|
sgc.get_phys_addr = (PGETPHYSADDR)esas2r_disc_get_phys_addr;
|
|
sgc.length = offsetof(struct atto_ioctl, data)
|
|
+ sizeof(struct atto_hba_get_device_address);
|
|
|
|
esas2r_sgc_init(&sgc, a, rq, rq->vrq->ioctl.sge);
|
|
|
|
esas2r_build_ioctl_req(a, rq, sgc.length, VDA_IOCTL_HBA);
|
|
|
|
if (!esas2r_build_sg_list(a, rq, &sgc)) {
|
|
esas2r_rq_destroy_request(rq, a);
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return false;
|
|
}
|
|
|
|
rq->comp_cb = esas2r_disc_passthru_dev_addr_cb;
|
|
|
|
rq->interrupt_cx = dc;
|
|
|
|
/* format the IOCTL data. */
|
|
|
|
hi = (struct atto_ioctl *)a->disc_buffer;
|
|
|
|
memset(a->disc_buffer, 0, ESAS2R_DISC_BUF_LEN);
|
|
|
|
hi->version = ATTO_VER_GET_DEV_ADDR0;
|
|
hi->function = ATTO_FUNC_GET_DEV_ADDR;
|
|
hi->flags = HBAF_TUNNEL;
|
|
|
|
hi->data.get_dev_addr.target_id = le32_to_cpu(dc->curr_phys_id);
|
|
hi->data.get_dev_addr.addr_type = dc->dev_addr_type;
|
|
|
|
/* start it up. */
|
|
|
|
rslt = esas2r_disc_start_request(a, rq);
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return rslt;
|
|
}
|
|
|
|
static void esas2r_disc_passthru_dev_addr_cb(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
struct esas2r_target *t = NULL;
|
|
unsigned long flags;
|
|
struct atto_ioctl *hi;
|
|
u16 addrlen;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
spin_lock_irqsave(&a->mem_lock, flags);
|
|
|
|
hi = (struct atto_ioctl *)a->disc_buffer;
|
|
|
|
if (rq->req_stat == RS_SUCCESS
|
|
&& hi->status == ATTO_STS_SUCCESS) {
|
|
addrlen = le16_to_cpu(hi->data.get_dev_addr.addr_len);
|
|
|
|
if (dc->dev_addr_type == ATTO_GDA_AT_PORT) {
|
|
if (addrlen == sizeof(u64))
|
|
memcpy(&dc->sas_addr,
|
|
&hi->data.get_dev_addr.address[0],
|
|
addrlen);
|
|
else
|
|
memset(&dc->sas_addr, 0, sizeof(dc->sas_addr));
|
|
|
|
/* Get the unique identifier. */
|
|
dc->dev_addr_type = ATTO_GDA_AT_UNIQUE;
|
|
|
|
goto next_dev_addr;
|
|
} else {
|
|
/* Add the pass through target. */
|
|
if (HIBYTE(addrlen) == 0) {
|
|
t = esas2r_targ_db_add_pthru(a,
|
|
dc,
|
|
&hi->data.
|
|
get_dev_addr.
|
|
address[0],
|
|
(u8)hi->data.
|
|
get_dev_addr.
|
|
addr_len);
|
|
|
|
if (t)
|
|
memcpy(&t->sas_addr, &dc->sas_addr,
|
|
sizeof(t->sas_addr));
|
|
} else {
|
|
/* getting the back end data failed */
|
|
|
|
esas2r_log(ESAS2R_LOG_WARN,
|
|
"an error occurred retrieving the "
|
|
"back end data (%s:%d)",
|
|
__func__,
|
|
__LINE__);
|
|
}
|
|
}
|
|
} else {
|
|
/* getting the back end data failed */
|
|
|
|
esas2r_log(ESAS2R_LOG_WARN,
|
|
"an error occurred retrieving the back end data - "
|
|
"rq->req_stat:%d hi->status:%d",
|
|
rq->req_stat, hi->status);
|
|
}
|
|
|
|
/* proceed to the next device. */
|
|
|
|
if (dc->flags & DCF_DEV_SCAN) {
|
|
dc->dev_ix++;
|
|
dc->state = DCS_PT_DEV_INFO;
|
|
} else if (dc->flags & DCF_DEV_CHANGE) {
|
|
dc->curr_targ++;
|
|
dc->state = DCS_DEV_ADD;
|
|
} else {
|
|
esas2r_bugon();
|
|
}
|
|
|
|
next_dev_addr:
|
|
esas2r_rq_destroy_request(rq, a);
|
|
|
|
/* continue discovery if it's interrupt driven */
|
|
|
|
if (!(dc->flags & DCF_POLLED))
|
|
esas2r_disc_continue(a, rq);
|
|
|
|
spin_unlock_irqrestore(&a->mem_lock, flags);
|
|
|
|
esas2r_trace_exit();
|
|
}
|
|
|
|
static u32 esas2r_disc_get_phys_addr(struct esas2r_sg_context *sgc, u64 *addr)
|
|
{
|
|
struct esas2r_adapter *a = sgc->adapter;
|
|
|
|
if (sgc->length > ESAS2R_DISC_BUF_LEN) {
|
|
esas2r_bugon();
|
|
}
|
|
|
|
*addr = a->uncached_phys
|
|
+ (u64)((u8 *)a->disc_buffer - a->uncached);
|
|
|
|
return sgc->length;
|
|
}
|
|
|
|
static bool esas2r_disc_dev_remove(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
struct esas2r_target *t;
|
|
struct esas2r_target *t2;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
/* process removals. */
|
|
|
|
for (t = a->targetdb; t < a->targetdb_end; t++) {
|
|
if (t->new_target_state != TS_NOT_PRESENT)
|
|
continue;
|
|
|
|
t->new_target_state = TS_INVALID;
|
|
|
|
/* remove the right target! */
|
|
|
|
t2 =
|
|
esas2r_targ_db_find_by_virt_id(a,
|
|
esas2r_targ_get_id(t,
|
|
a));
|
|
|
|
if (t2)
|
|
esas2r_targ_db_remove(a, t2);
|
|
}
|
|
|
|
/* removals complete. process arrivals. */
|
|
|
|
dc->state = DCS_DEV_ADD;
|
|
dc->curr_targ = a->targetdb;
|
|
|
|
esas2r_trace_exit();
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool esas2r_disc_dev_add(struct esas2r_adapter *a,
|
|
struct esas2r_request *rq)
|
|
{
|
|
struct esas2r_disc_context *dc =
|
|
(struct esas2r_disc_context *)rq->interrupt_cx;
|
|
struct esas2r_target *t = dc->curr_targ;
|
|
|
|
if (t >= a->targetdb_end) {
|
|
/* done processing state changes. */
|
|
|
|
dc->state = DCS_DISC_DONE;
|
|
} else if (t->new_target_state == TS_PRESENT) {
|
|
struct atto_vda_ae_lu *luevt = &t->lu_event;
|
|
|
|
esas2r_trace_enter();
|
|
|
|
/* clear this now in case more events come in. */
|
|
|
|
t->new_target_state = TS_INVALID;
|
|
|
|
/* setup the discovery context for adding this device. */
|
|
|
|
dc->curr_virt_id = esas2r_targ_get_id(t, a);
|
|
|
|
if ((luevt->hdr.bylength >= offsetof(struct atto_vda_ae_lu, id)
|
|
+ sizeof(struct atto_vda_ae_lu_tgt_lun_raid))
|
|
&& !(luevt->dwevent & VDAAE_LU_PASSTHROUGH)) {
|
|
dc->block_size = luevt->id.tgtlun_raid.dwblock_size;
|
|
dc->interleave = luevt->id.tgtlun_raid.dwinterleave;
|
|
} else {
|
|
dc->block_size = 0;
|
|
dc->interleave = 0;
|
|
}
|
|
|
|
/* determine the device type being added. */
|
|
|
|
if (luevt->dwevent & VDAAE_LU_PASSTHROUGH) {
|
|
if (luevt->dwevent & VDAAE_LU_PHYS_ID) {
|
|
dc->state = DCS_PT_DEV_ADDR;
|
|
dc->dev_addr_type = ATTO_GDA_AT_PORT;
|
|
dc->curr_phys_id = luevt->wphys_target_id;
|
|
} else {
|
|
esas2r_log(ESAS2R_LOG_WARN,
|
|
"luevt->dwevent does not have the "
|
|
"VDAAE_LU_PHYS_ID bit set (%s:%d)",
|
|
__func__, __LINE__);
|
|
}
|
|
} else {
|
|
dc->raid_grp_name[0] = 0;
|
|
|
|
esas2r_targ_db_add_raid(a, dc);
|
|
}
|
|
|
|
esas2r_trace("curr_virt_id: %d", dc->curr_virt_id);
|
|
esas2r_trace("curr_phys_id: %d", dc->curr_phys_id);
|
|
esas2r_trace("dwevent: %d", luevt->dwevent);
|
|
|
|
esas2r_trace_exit();
|
|
}
|
|
|
|
if (dc->state == DCS_DEV_ADD) {
|
|
/* go to the next device. */
|
|
|
|
dc->curr_targ++;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* When discovery is done, find all requests on defer queue and
|
|
* test if they need to be modified. If a target is no longer present
|
|
* then complete the request with RS_SEL. Otherwise, update the
|
|
* target_id since after a hibernate it can be a different value.
|
|
* VDA does not make passthrough target IDs persistent.
|
|
*/
|
|
static void esas2r_disc_fix_curr_requests(struct esas2r_adapter *a)
|
|
{
|
|
unsigned long flags;
|
|
struct esas2r_target *t;
|
|
struct esas2r_request *rq;
|
|
struct list_head *element;
|
|
|
|
/* update virt_targ_id in any outstanding esas2r_requests */
|
|
|
|
spin_lock_irqsave(&a->queue_lock, flags);
|
|
|
|
list_for_each(element, &a->defer_list) {
|
|
rq = list_entry(element, struct esas2r_request, req_list);
|
|
if (rq->vrq->scsi.function == VDA_FUNC_SCSI) {
|
|
t = a->targetdb + rq->target_id;
|
|
|
|
if (t->target_state == TS_PRESENT)
|
|
rq->vrq->scsi.target_id = le16_to_cpu(
|
|
t->virt_targ_id);
|
|
else
|
|
rq->req_stat = RS_SEL;
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&a->queue_lock, flags);
|
|
}
|