ee7f4d8187
I believe that this patch handled the problem from the wrong side. Instead of making ZFS properly handle large stripe sizes, it made unrelated driver to lie in reported parameters to workaround that. Alternative solution for this problem from ZFS side was committed at r296615. Discussed with: smh
302 lines
8.7 KiB
C
302 lines
8.7 KiB
C
/*-
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* Copyright (C) 2012-2016 Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/sysctl.h>
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#include "nvme_private.h"
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/*
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* CTLTYPE_S64 and sysctl_handle_64 were added in r217616. Define these
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* explicitly here for older kernels that don't include the r217616
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* changeset.
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*/
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#ifndef CTLTYPE_S64
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#define CTLTYPE_S64 CTLTYPE_QUAD
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#define sysctl_handle_64 sysctl_handle_quad
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#endif
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static void
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nvme_dump_queue(struct nvme_qpair *qpair)
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{
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struct nvme_completion *cpl;
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struct nvme_command *cmd;
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int i;
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printf("id:%04Xh phase:%d\n", qpair->id, qpair->phase);
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printf("Completion queue:\n");
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for (i = 0; i < qpair->num_entries; i++) {
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cpl = &qpair->cpl[i];
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printf("%05d: ", i);
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nvme_dump_completion(cpl);
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}
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printf("Submission queue:\n");
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for (i = 0; i < qpair->num_entries; i++) {
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cmd = &qpair->cmd[i];
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printf("%05d: ", i);
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nvme_dump_command(cmd);
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}
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}
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static int
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nvme_sysctl_dump_debug(SYSCTL_HANDLER_ARGS)
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{
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struct nvme_qpair *qpair = arg1;
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uint32_t val = 0;
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int error = sysctl_handle_int(oidp, &val, 0, req);
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if (error)
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return (error);
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if (val != 0)
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nvme_dump_queue(qpair);
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return (0);
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}
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static int
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nvme_sysctl_int_coal_time(SYSCTL_HANDLER_ARGS)
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{
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struct nvme_controller *ctrlr = arg1;
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uint32_t oldval = ctrlr->int_coal_time;
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int error = sysctl_handle_int(oidp, &ctrlr->int_coal_time, 0,
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req);
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if (error)
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return (error);
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if (oldval != ctrlr->int_coal_time)
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nvme_ctrlr_cmd_set_interrupt_coalescing(ctrlr,
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ctrlr->int_coal_time, ctrlr->int_coal_threshold, NULL,
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NULL);
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return (0);
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}
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static int
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nvme_sysctl_int_coal_threshold(SYSCTL_HANDLER_ARGS)
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{
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struct nvme_controller *ctrlr = arg1;
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uint32_t oldval = ctrlr->int_coal_threshold;
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int error = sysctl_handle_int(oidp, &ctrlr->int_coal_threshold, 0,
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req);
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if (error)
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return (error);
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if (oldval != ctrlr->int_coal_threshold)
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nvme_ctrlr_cmd_set_interrupt_coalescing(ctrlr,
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ctrlr->int_coal_time, ctrlr->int_coal_threshold, NULL,
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NULL);
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return (0);
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}
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static int
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nvme_sysctl_timeout_period(SYSCTL_HANDLER_ARGS)
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{
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struct nvme_controller *ctrlr = arg1;
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uint32_t oldval = ctrlr->timeout_period;
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int error = sysctl_handle_int(oidp, &ctrlr->timeout_period, 0, req);
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if (error)
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return (error);
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if (ctrlr->timeout_period > NVME_MAX_TIMEOUT_PERIOD ||
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ctrlr->timeout_period < NVME_MIN_TIMEOUT_PERIOD) {
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ctrlr->timeout_period = oldval;
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return (EINVAL);
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}
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return (0);
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}
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static void
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nvme_qpair_reset_stats(struct nvme_qpair *qpair)
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{
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qpair->num_cmds = 0;
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qpair->num_intr_handler_calls = 0;
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}
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static int
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nvme_sysctl_num_cmds(SYSCTL_HANDLER_ARGS)
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{
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struct nvme_controller *ctrlr = arg1;
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int64_t num_cmds = 0;
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int i;
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num_cmds = ctrlr->adminq.num_cmds;
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for (i = 0; i < ctrlr->num_io_queues; i++)
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num_cmds += ctrlr->ioq[i].num_cmds;
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return (sysctl_handle_64(oidp, &num_cmds, 0, req));
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}
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static int
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nvme_sysctl_num_intr_handler_calls(SYSCTL_HANDLER_ARGS)
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{
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struct nvme_controller *ctrlr = arg1;
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int64_t num_intr_handler_calls = 0;
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int i;
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num_intr_handler_calls = ctrlr->adminq.num_intr_handler_calls;
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for (i = 0; i < ctrlr->num_io_queues; i++)
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num_intr_handler_calls += ctrlr->ioq[i].num_intr_handler_calls;
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return (sysctl_handle_64(oidp, &num_intr_handler_calls, 0, req));
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}
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static int
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nvme_sysctl_reset_stats(SYSCTL_HANDLER_ARGS)
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{
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struct nvme_controller *ctrlr = arg1;
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uint32_t i, val = 0;
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int error = sysctl_handle_int(oidp, &val, 0, req);
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if (error)
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return (error);
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if (val != 0) {
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nvme_qpair_reset_stats(&ctrlr->adminq);
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for (i = 0; i < ctrlr->num_io_queues; i++)
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nvme_qpair_reset_stats(&ctrlr->ioq[i]);
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}
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return (0);
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}
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static void
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nvme_sysctl_initialize_queue(struct nvme_qpair *qpair,
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struct sysctl_ctx_list *ctrlr_ctx, struct sysctl_oid *que_tree)
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{
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struct sysctl_oid_list *que_list = SYSCTL_CHILDREN(que_tree);
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SYSCTL_ADD_UINT(ctrlr_ctx, que_list, OID_AUTO, "num_entries",
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CTLFLAG_RD, &qpair->num_entries, 0,
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"Number of entries in hardware queue");
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SYSCTL_ADD_UINT(ctrlr_ctx, que_list, OID_AUTO, "num_trackers",
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CTLFLAG_RD, &qpair->num_trackers, 0,
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"Number of trackers pre-allocated for this queue pair");
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SYSCTL_ADD_UINT(ctrlr_ctx, que_list, OID_AUTO, "sq_head",
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CTLFLAG_RD, &qpair->sq_head, 0,
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"Current head of submission queue (as observed by driver)");
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SYSCTL_ADD_UINT(ctrlr_ctx, que_list, OID_AUTO, "sq_tail",
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CTLFLAG_RD, &qpair->sq_tail, 0,
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"Current tail of submission queue (as observed by driver)");
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SYSCTL_ADD_UINT(ctrlr_ctx, que_list, OID_AUTO, "cq_head",
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CTLFLAG_RD, &qpair->cq_head, 0,
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"Current head of completion queue (as observed by driver)");
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SYSCTL_ADD_QUAD(ctrlr_ctx, que_list, OID_AUTO, "num_cmds",
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CTLFLAG_RD, &qpair->num_cmds, "Number of commands submitted");
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SYSCTL_ADD_QUAD(ctrlr_ctx, que_list, OID_AUTO, "num_intr_handler_calls",
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CTLFLAG_RD, &qpair->num_intr_handler_calls,
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"Number of times interrupt handler was invoked (will typically be "
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"less than number of actual interrupts generated due to "
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"coalescing)");
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SYSCTL_ADD_PROC(ctrlr_ctx, que_list, OID_AUTO,
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"dump_debug", CTLTYPE_UINT | CTLFLAG_RW, qpair, 0,
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nvme_sysctl_dump_debug, "IU", "Dump debug data");
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}
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void
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nvme_sysctl_initialize_ctrlr(struct nvme_controller *ctrlr)
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{
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struct sysctl_ctx_list *ctrlr_ctx;
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struct sysctl_oid *ctrlr_tree, *que_tree;
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struct sysctl_oid_list *ctrlr_list;
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#define QUEUE_NAME_LENGTH 16
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char queue_name[QUEUE_NAME_LENGTH];
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int i;
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ctrlr_ctx = device_get_sysctl_ctx(ctrlr->dev);
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ctrlr_tree = device_get_sysctl_tree(ctrlr->dev);
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ctrlr_list = SYSCTL_CHILDREN(ctrlr_tree);
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SYSCTL_ADD_UINT(ctrlr_ctx, ctrlr_list, OID_AUTO, "num_cpus_per_ioq",
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CTLFLAG_RD, &ctrlr->num_cpus_per_ioq, 0,
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"Number of CPUs assigned per I/O queue pair");
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SYSCTL_ADD_PROC(ctrlr_ctx, ctrlr_list, OID_AUTO,
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"int_coal_time", CTLTYPE_UINT | CTLFLAG_RW, ctrlr, 0,
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nvme_sysctl_int_coal_time, "IU",
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"Interrupt coalescing timeout (in microseconds)");
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SYSCTL_ADD_PROC(ctrlr_ctx, ctrlr_list, OID_AUTO,
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"int_coal_threshold", CTLTYPE_UINT | CTLFLAG_RW, ctrlr, 0,
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nvme_sysctl_int_coal_threshold, "IU",
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"Interrupt coalescing threshold");
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SYSCTL_ADD_PROC(ctrlr_ctx, ctrlr_list, OID_AUTO,
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"timeout_period", CTLTYPE_UINT | CTLFLAG_RW, ctrlr, 0,
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nvme_sysctl_timeout_period, "IU",
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"Timeout period (in seconds)");
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SYSCTL_ADD_PROC(ctrlr_ctx, ctrlr_list, OID_AUTO,
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"num_cmds", CTLTYPE_S64 | CTLFLAG_RD,
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ctrlr, 0, nvme_sysctl_num_cmds, "IU",
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"Number of commands submitted");
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SYSCTL_ADD_PROC(ctrlr_ctx, ctrlr_list, OID_AUTO,
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"num_intr_handler_calls", CTLTYPE_S64 | CTLFLAG_RD,
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ctrlr, 0, nvme_sysctl_num_intr_handler_calls, "IU",
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"Number of times interrupt handler was invoked (will "
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"typically be less than number of actual interrupts "
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"generated due to coalescing)");
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SYSCTL_ADD_PROC(ctrlr_ctx, ctrlr_list, OID_AUTO,
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"reset_stats", CTLTYPE_UINT | CTLFLAG_RW, ctrlr, 0,
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nvme_sysctl_reset_stats, "IU", "Reset statistics to zero");
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que_tree = SYSCTL_ADD_NODE(ctrlr_ctx, ctrlr_list, OID_AUTO, "adminq",
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CTLFLAG_RD, NULL, "Admin Queue");
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nvme_sysctl_initialize_queue(&ctrlr->adminq, ctrlr_ctx, que_tree);
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for (i = 0; i < ctrlr->num_io_queues; i++) {
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snprintf(queue_name, QUEUE_NAME_LENGTH, "ioq%d", i);
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que_tree = SYSCTL_ADD_NODE(ctrlr_ctx, ctrlr_list, OID_AUTO,
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queue_name, CTLFLAG_RD, NULL, "IO Queue");
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nvme_sysctl_initialize_queue(&ctrlr->ioq[i], ctrlr_ctx,
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que_tree);
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}
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}
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