56183abc2b
notification gets sent in cases where system shuts down with driver unloaded. Sponsored by: Intel Reviewed by: carl MFC after: 3 days
1235 lines
31 KiB
C
1235 lines
31 KiB
C
/*-
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* Copyright (C) 2012-2013 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/systm.h>
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#include <sys/buf.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/ioccom.h>
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#include <sys/proc.h>
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#include <sys/smp.h>
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#include <sys/uio.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include "nvme_private.h"
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static void nvme_ctrlr_construct_and_submit_aer(struct nvme_controller *ctrlr,
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struct nvme_async_event_request *aer);
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static int
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nvme_ctrlr_allocate_bar(struct nvme_controller *ctrlr)
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{
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/* Chatham puts the NVMe MMRs behind BAR 2/3, not BAR 0/1. */
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if (pci_get_devid(ctrlr->dev) == CHATHAM_PCI_ID)
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ctrlr->resource_id = PCIR_BAR(2);
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else
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ctrlr->resource_id = PCIR_BAR(0);
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ctrlr->resource = bus_alloc_resource(ctrlr->dev, SYS_RES_MEMORY,
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&ctrlr->resource_id, 0, ~0, 1, RF_ACTIVE);
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if(ctrlr->resource == NULL) {
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nvme_printf(ctrlr, "unable to allocate pci resource\n");
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return (ENOMEM);
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}
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ctrlr->bus_tag = rman_get_bustag(ctrlr->resource);
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ctrlr->bus_handle = rman_get_bushandle(ctrlr->resource);
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ctrlr->regs = (struct nvme_registers *)ctrlr->bus_handle;
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/*
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* The NVMe spec allows for the MSI-X table to be placed behind
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* BAR 4/5, separate from the control/doorbell registers. Always
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* try to map this bar, because it must be mapped prior to calling
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* pci_alloc_msix(). If the table isn't behind BAR 4/5,
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* bus_alloc_resource() will just return NULL which is OK.
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*/
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ctrlr->bar4_resource_id = PCIR_BAR(4);
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ctrlr->bar4_resource = bus_alloc_resource(ctrlr->dev, SYS_RES_MEMORY,
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&ctrlr->bar4_resource_id, 0, ~0, 1, RF_ACTIVE);
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return (0);
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}
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#ifdef CHATHAM2
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static int
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nvme_ctrlr_allocate_chatham_bar(struct nvme_controller *ctrlr)
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{
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ctrlr->chatham_resource_id = PCIR_BAR(CHATHAM_CONTROL_BAR);
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ctrlr->chatham_resource = bus_alloc_resource(ctrlr->dev,
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SYS_RES_MEMORY, &ctrlr->chatham_resource_id, 0, ~0, 1,
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RF_ACTIVE);
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if(ctrlr->chatham_resource == NULL) {
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nvme_printf(ctrlr, "unable to alloc pci resource\n");
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return (ENOMEM);
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}
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ctrlr->chatham_bus_tag = rman_get_bustag(ctrlr->chatham_resource);
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ctrlr->chatham_bus_handle =
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rman_get_bushandle(ctrlr->chatham_resource);
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return (0);
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}
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static void
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nvme_ctrlr_setup_chatham(struct nvme_controller *ctrlr)
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{
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uint64_t reg1, reg2, reg3;
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uint64_t temp1, temp2;
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uint32_t temp3;
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uint32_t use_flash_timings = 0;
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DELAY(10000);
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temp3 = chatham_read_4(ctrlr, 0x8080);
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device_printf(ctrlr->dev, "Chatham version: 0x%x\n", temp3);
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ctrlr->chatham_lbas = chatham_read_4(ctrlr, 0x8068) - 0x110;
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ctrlr->chatham_size = ctrlr->chatham_lbas * 512;
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device_printf(ctrlr->dev, "Chatham size: %jd\n",
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(intmax_t)ctrlr->chatham_size);
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reg1 = reg2 = reg3 = ctrlr->chatham_size - 1;
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TUNABLE_INT_FETCH("hw.nvme.use_flash_timings", &use_flash_timings);
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if (use_flash_timings) {
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device_printf(ctrlr->dev, "Chatham: using flash timings\n");
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temp1 = 0x00001b58000007d0LL;
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temp2 = 0x000000cb00000131LL;
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} else {
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device_printf(ctrlr->dev, "Chatham: using DDR timings\n");
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temp1 = temp2 = 0x0LL;
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}
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chatham_write_8(ctrlr, 0x8000, reg1);
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chatham_write_8(ctrlr, 0x8008, reg2);
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chatham_write_8(ctrlr, 0x8010, reg3);
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chatham_write_8(ctrlr, 0x8020, temp1);
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temp3 = chatham_read_4(ctrlr, 0x8020);
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chatham_write_8(ctrlr, 0x8028, temp2);
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temp3 = chatham_read_4(ctrlr, 0x8028);
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chatham_write_8(ctrlr, 0x8030, temp1);
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chatham_write_8(ctrlr, 0x8038, temp2);
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chatham_write_8(ctrlr, 0x8040, temp1);
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chatham_write_8(ctrlr, 0x8048, temp2);
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chatham_write_8(ctrlr, 0x8050, temp1);
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chatham_write_8(ctrlr, 0x8058, temp2);
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DELAY(10000);
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}
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static void
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nvme_chatham_populate_cdata(struct nvme_controller *ctrlr)
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{
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struct nvme_controller_data *cdata;
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cdata = &ctrlr->cdata;
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cdata->vid = 0x8086;
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cdata->ssvid = 0x2011;
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/*
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* Chatham2 puts garbage data in these fields when we
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* invoke IDENTIFY_CONTROLLER, so we need to re-zero
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* the fields before calling bcopy().
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*/
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memset(cdata->sn, 0, sizeof(cdata->sn));
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memcpy(cdata->sn, "2012", strlen("2012"));
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memset(cdata->mn, 0, sizeof(cdata->mn));
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memcpy(cdata->mn, "CHATHAM2", strlen("CHATHAM2"));
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memset(cdata->fr, 0, sizeof(cdata->fr));
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memcpy(cdata->fr, "0", strlen("0"));
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cdata->rab = 8;
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cdata->aerl = 3;
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cdata->lpa.ns_smart = 1;
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cdata->sqes.min = 6;
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cdata->sqes.max = 6;
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cdata->sqes.min = 4;
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cdata->sqes.max = 4;
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cdata->nn = 1;
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/* Chatham2 doesn't support DSM command */
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cdata->oncs.dsm = 0;
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cdata->vwc.present = 1;
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}
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#endif /* CHATHAM2 */
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static void
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nvme_ctrlr_construct_admin_qpair(struct nvme_controller *ctrlr)
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{
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struct nvme_qpair *qpair;
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uint32_t num_entries;
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qpair = &ctrlr->adminq;
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num_entries = NVME_ADMIN_ENTRIES;
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TUNABLE_INT_FETCH("hw.nvme.admin_entries", &num_entries);
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/*
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* If admin_entries was overridden to an invalid value, revert it
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* back to our default value.
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*/
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if (num_entries < NVME_MIN_ADMIN_ENTRIES ||
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num_entries > NVME_MAX_ADMIN_ENTRIES) {
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nvme_printf(ctrlr, "invalid hw.nvme.admin_entries=%d "
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"specified\n", num_entries);
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num_entries = NVME_ADMIN_ENTRIES;
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}
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/*
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* The admin queue's max xfer size is treated differently than the
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* max I/O xfer size. 16KB is sufficient here - maybe even less?
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*/
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nvme_qpair_construct(qpair,
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0, /* qpair ID */
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0, /* vector */
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num_entries,
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NVME_ADMIN_TRACKERS,
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ctrlr);
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}
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static int
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nvme_ctrlr_construct_io_qpairs(struct nvme_controller *ctrlr)
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{
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struct nvme_qpair *qpair;
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union cap_lo_register cap_lo;
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int i, num_entries, num_trackers;
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num_entries = NVME_IO_ENTRIES;
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TUNABLE_INT_FETCH("hw.nvme.io_entries", &num_entries);
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/*
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* NVMe spec sets a hard limit of 64K max entries, but
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* devices may specify a smaller limit, so we need to check
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* the MQES field in the capabilities register.
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*/
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cap_lo.raw = nvme_mmio_read_4(ctrlr, cap_lo);
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num_entries = min(num_entries, cap_lo.bits.mqes+1);
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num_trackers = NVME_IO_TRACKERS;
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TUNABLE_INT_FETCH("hw.nvme.io_trackers", &num_trackers);
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num_trackers = max(num_trackers, NVME_MIN_IO_TRACKERS);
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num_trackers = min(num_trackers, NVME_MAX_IO_TRACKERS);
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/*
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* No need to have more trackers than entries in the submit queue.
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* Note also that for a queue size of N, we can only have (N-1)
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* commands outstanding, hence the "-1" here.
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*/
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num_trackers = min(num_trackers, (num_entries-1));
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ctrlr->ioq = malloc(ctrlr->num_io_queues * sizeof(struct nvme_qpair),
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M_NVME, M_ZERO | M_WAITOK);
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for (i = 0; i < ctrlr->num_io_queues; i++) {
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qpair = &ctrlr->ioq[i];
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/*
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* Admin queue has ID=0. IO queues start at ID=1 -
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* hence the 'i+1' here.
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*
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* For I/O queues, use the controller-wide max_xfer_size
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* calculated in nvme_attach().
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*/
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nvme_qpair_construct(qpair,
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i+1, /* qpair ID */
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ctrlr->msix_enabled ? i+1 : 0, /* vector */
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num_entries,
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num_trackers,
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ctrlr);
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if (ctrlr->per_cpu_io_queues)
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bus_bind_intr(ctrlr->dev, qpair->res, 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_ctrlr_fail(struct nvme_controller *ctrlr)
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{
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int i;
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ctrlr->is_failed = TRUE;
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nvme_qpair_fail(&ctrlr->adminq);
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for (i = 0; i < ctrlr->num_io_queues; i++)
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nvme_qpair_fail(&ctrlr->ioq[i]);
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nvme_notify_fail_consumers(ctrlr);
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}
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void
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nvme_ctrlr_post_failed_request(struct nvme_controller *ctrlr,
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struct nvme_request *req)
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{
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mtx_lock(&ctrlr->lock);
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STAILQ_INSERT_TAIL(&ctrlr->fail_req, req, stailq);
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mtx_unlock(&ctrlr->lock);
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taskqueue_enqueue(ctrlr->taskqueue, &ctrlr->fail_req_task);
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}
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static void
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nvme_ctrlr_fail_req_task(void *arg, int pending)
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{
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struct nvme_controller *ctrlr = arg;
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struct nvme_request *req;
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mtx_lock(&ctrlr->lock);
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while (!STAILQ_EMPTY(&ctrlr->fail_req)) {
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req = STAILQ_FIRST(&ctrlr->fail_req);
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STAILQ_REMOVE_HEAD(&ctrlr->fail_req, stailq);
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nvme_qpair_manual_complete_request(req->qpair, req,
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NVME_SCT_GENERIC, NVME_SC_ABORTED_BY_REQUEST, TRUE);
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}
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mtx_unlock(&ctrlr->lock);
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}
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static int
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nvme_ctrlr_wait_for_ready(struct nvme_controller *ctrlr)
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{
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int ms_waited;
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union cc_register cc;
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union csts_register csts;
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cc.raw = nvme_mmio_read_4(ctrlr, cc);
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csts.raw = nvme_mmio_read_4(ctrlr, csts);
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if (!cc.bits.en) {
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nvme_printf(ctrlr, "%s called with cc.en = 0\n", __func__);
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return (ENXIO);
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}
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ms_waited = 0;
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while (!csts.bits.rdy) {
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DELAY(1000);
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if (ms_waited++ > ctrlr->ready_timeout_in_ms) {
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nvme_printf(ctrlr, "controller did not become ready "
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"within %d ms\n", ctrlr->ready_timeout_in_ms);
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return (ENXIO);
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}
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csts.raw = nvme_mmio_read_4(ctrlr, csts);
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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_ctrlr_disable(struct nvme_controller *ctrlr)
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{
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union cc_register cc;
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union csts_register csts;
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cc.raw = nvme_mmio_read_4(ctrlr, cc);
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csts.raw = nvme_mmio_read_4(ctrlr, csts);
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if (cc.bits.en == 1 && csts.bits.rdy == 0)
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nvme_ctrlr_wait_for_ready(ctrlr);
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cc.bits.en = 0;
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nvme_mmio_write_4(ctrlr, cc, cc.raw);
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DELAY(5000);
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}
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static int
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nvme_ctrlr_enable(struct nvme_controller *ctrlr)
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{
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union cc_register cc;
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union csts_register csts;
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union aqa_register aqa;
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cc.raw = nvme_mmio_read_4(ctrlr, cc);
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csts.raw = nvme_mmio_read_4(ctrlr, csts);
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if (cc.bits.en == 1) {
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if (csts.bits.rdy == 1)
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return (0);
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else
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return (nvme_ctrlr_wait_for_ready(ctrlr));
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}
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nvme_mmio_write_8(ctrlr, asq, ctrlr->adminq.cmd_bus_addr);
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DELAY(5000);
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nvme_mmio_write_8(ctrlr, acq, ctrlr->adminq.cpl_bus_addr);
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DELAY(5000);
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aqa.raw = 0;
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/* acqs and asqs are 0-based. */
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aqa.bits.acqs = ctrlr->adminq.num_entries-1;
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aqa.bits.asqs = ctrlr->adminq.num_entries-1;
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nvme_mmio_write_4(ctrlr, aqa, aqa.raw);
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DELAY(5000);
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cc.bits.en = 1;
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cc.bits.css = 0;
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cc.bits.ams = 0;
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cc.bits.shn = 0;
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cc.bits.iosqes = 6; /* SQ entry size == 64 == 2^6 */
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cc.bits.iocqes = 4; /* CQ entry size == 16 == 2^4 */
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/* This evaluates to 0, which is according to spec. */
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cc.bits.mps = (PAGE_SIZE >> 13);
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nvme_mmio_write_4(ctrlr, cc, cc.raw);
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DELAY(5000);
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return (nvme_ctrlr_wait_for_ready(ctrlr));
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}
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int
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nvme_ctrlr_hw_reset(struct nvme_controller *ctrlr)
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{
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int i;
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nvme_admin_qpair_disable(&ctrlr->adminq);
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for (i = 0; i < ctrlr->num_io_queues; i++)
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nvme_io_qpair_disable(&ctrlr->ioq[i]);
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DELAY(100*1000);
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nvme_ctrlr_disable(ctrlr);
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return (nvme_ctrlr_enable(ctrlr));
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}
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void
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nvme_ctrlr_reset(struct nvme_controller *ctrlr)
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{
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int cmpset;
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cmpset = atomic_cmpset_32(&ctrlr->is_resetting, 0, 1);
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if (cmpset == 0 || ctrlr->is_failed)
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/*
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* Controller is already resetting or has failed. Return
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* immediately since there is no need to kick off another
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* reset in these cases.
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*/
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return;
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taskqueue_enqueue(ctrlr->taskqueue, &ctrlr->reset_task);
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}
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static int
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nvme_ctrlr_identify(struct nvme_controller *ctrlr)
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{
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struct nvme_completion_poll_status status;
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status.done = FALSE;
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nvme_ctrlr_cmd_identify_controller(ctrlr, &ctrlr->cdata,
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nvme_completion_poll_cb, &status);
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while (status.done == FALSE)
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pause("nvme", 1);
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if (nvme_completion_is_error(&status.cpl)) {
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nvme_printf(ctrlr, "nvme_identify_controller failed!\n");
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return (ENXIO);
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}
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#ifdef CHATHAM2
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if (pci_get_devid(ctrlr->dev) == CHATHAM_PCI_ID)
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nvme_chatham_populate_cdata(ctrlr);
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#endif
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/*
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* Use MDTS to ensure our default max_xfer_size doesn't exceed what the
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* controller supports.
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*/
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if (ctrlr->cdata.mdts > 0)
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ctrlr->max_xfer_size = min(ctrlr->max_xfer_size,
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ctrlr->min_page_size * (1 << (ctrlr->cdata.mdts)));
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return (0);
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}
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|
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static int
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nvme_ctrlr_set_num_qpairs(struct nvme_controller *ctrlr)
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{
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struct nvme_completion_poll_status status;
|
|
int cq_allocated, i, sq_allocated;
|
|
|
|
status.done = FALSE;
|
|
nvme_ctrlr_cmd_set_num_queues(ctrlr, ctrlr->num_io_queues,
|
|
nvme_completion_poll_cb, &status);
|
|
while (status.done == FALSE)
|
|
pause("nvme", 1);
|
|
if (nvme_completion_is_error(&status.cpl)) {
|
|
nvme_printf(ctrlr, "nvme_set_num_queues failed!\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/*
|
|
* Data in cdw0 is 0-based.
|
|
* Lower 16-bits indicate number of submission queues allocated.
|
|
* Upper 16-bits indicate number of completion queues allocated.
|
|
*/
|
|
sq_allocated = (status.cpl.cdw0 & 0xFFFF) + 1;
|
|
cq_allocated = (status.cpl.cdw0 >> 16) + 1;
|
|
|
|
/*
|
|
* Check that the controller was able to allocate the number of
|
|
* queues we requested. If not, revert to one IO queue pair.
|
|
*/
|
|
if (sq_allocated < ctrlr->num_io_queues ||
|
|
cq_allocated < ctrlr->num_io_queues) {
|
|
|
|
/*
|
|
* Destroy extra IO queue pairs that were created at
|
|
* controller construction time but are no longer
|
|
* needed. This will only happen when a controller
|
|
* supports fewer queues than MSI-X vectors. This
|
|
* is not the normal case, but does occur with the
|
|
* Chatham prototype board.
|
|
*/
|
|
for (i = 1; i < ctrlr->num_io_queues; i++)
|
|
nvme_io_qpair_destroy(&ctrlr->ioq[i]);
|
|
|
|
ctrlr->num_io_queues = 1;
|
|
ctrlr->per_cpu_io_queues = 0;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
nvme_ctrlr_create_qpairs(struct nvme_controller *ctrlr)
|
|
{
|
|
struct nvme_completion_poll_status status;
|
|
struct nvme_qpair *qpair;
|
|
int i;
|
|
|
|
for (i = 0; i < ctrlr->num_io_queues; i++) {
|
|
qpair = &ctrlr->ioq[i];
|
|
|
|
status.done = FALSE;
|
|
nvme_ctrlr_cmd_create_io_cq(ctrlr, qpair, qpair->vector,
|
|
nvme_completion_poll_cb, &status);
|
|
while (status.done == FALSE)
|
|
pause("nvme", 1);
|
|
if (nvme_completion_is_error(&status.cpl)) {
|
|
nvme_printf(ctrlr, "nvme_create_io_cq failed!\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
status.done = FALSE;
|
|
nvme_ctrlr_cmd_create_io_sq(qpair->ctrlr, qpair,
|
|
nvme_completion_poll_cb, &status);
|
|
while (status.done == FALSE)
|
|
pause("nvme", 1);
|
|
if (nvme_completion_is_error(&status.cpl)) {
|
|
nvme_printf(ctrlr, "nvme_create_io_sq failed!\n");
|
|
return (ENXIO);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
nvme_ctrlr_construct_namespaces(struct nvme_controller *ctrlr)
|
|
{
|
|
struct nvme_namespace *ns;
|
|
int i, status;
|
|
|
|
for (i = 0; i < ctrlr->cdata.nn; i++) {
|
|
ns = &ctrlr->ns[i];
|
|
status = nvme_ns_construct(ns, i+1, ctrlr);
|
|
if (status != 0)
|
|
return (status);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static boolean_t
|
|
is_log_page_id_valid(uint8_t page_id)
|
|
{
|
|
|
|
switch (page_id) {
|
|
case NVME_LOG_ERROR:
|
|
case NVME_LOG_HEALTH_INFORMATION:
|
|
case NVME_LOG_FIRMWARE_SLOT:
|
|
return (TRUE);
|
|
}
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static uint32_t
|
|
nvme_ctrlr_get_log_page_size(struct nvme_controller *ctrlr, uint8_t page_id)
|
|
{
|
|
uint32_t log_page_size;
|
|
|
|
switch (page_id) {
|
|
case NVME_LOG_ERROR:
|
|
log_page_size = min(
|
|
sizeof(struct nvme_error_information_entry) *
|
|
ctrlr->cdata.elpe,
|
|
NVME_MAX_AER_LOG_SIZE);
|
|
break;
|
|
case NVME_LOG_HEALTH_INFORMATION:
|
|
log_page_size = sizeof(struct nvme_health_information_page);
|
|
break;
|
|
case NVME_LOG_FIRMWARE_SLOT:
|
|
log_page_size = sizeof(struct nvme_firmware_page);
|
|
break;
|
|
default:
|
|
log_page_size = 0;
|
|
break;
|
|
}
|
|
|
|
return (log_page_size);
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_async_event_log_page_cb(void *arg, const struct nvme_completion *cpl)
|
|
{
|
|
struct nvme_async_event_request *aer = arg;
|
|
|
|
/*
|
|
* If the log page fetch for some reason completed with an error,
|
|
* don't pass log page data to the consumers. In practice, this case
|
|
* should never happen.
|
|
*/
|
|
if (nvme_completion_is_error(cpl))
|
|
nvme_notify_async_consumers(aer->ctrlr, &aer->cpl,
|
|
aer->log_page_id, NULL, 0);
|
|
else
|
|
/*
|
|
* Pass the cpl data from the original async event completion,
|
|
* not the log page fetch.
|
|
*/
|
|
nvme_notify_async_consumers(aer->ctrlr, &aer->cpl,
|
|
aer->log_page_id, aer->log_page_buffer, aer->log_page_size);
|
|
|
|
/*
|
|
* Repost another asynchronous event request to replace the one
|
|
* that just completed.
|
|
*/
|
|
nvme_ctrlr_construct_and_submit_aer(aer->ctrlr, aer);
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_async_event_cb(void *arg, const struct nvme_completion *cpl)
|
|
{
|
|
struct nvme_async_event_request *aer = arg;
|
|
|
|
if (nvme_completion_is_error(cpl)) {
|
|
/*
|
|
* Do not retry failed async event requests. This avoids
|
|
* infinite loops where a new async event request is submitted
|
|
* to replace the one just failed, only to fail again and
|
|
* perpetuate the loop.
|
|
*/
|
|
return;
|
|
}
|
|
|
|
/* Associated log page is in bits 23:16 of completion entry dw0. */
|
|
aer->log_page_id = (cpl->cdw0 & 0xFF0000) >> 16;
|
|
|
|
nvme_printf(aer->ctrlr, "async event occurred (log page id=0x%x)\n",
|
|
aer->log_page_id);
|
|
|
|
if (is_log_page_id_valid(aer->log_page_id)) {
|
|
aer->log_page_size = nvme_ctrlr_get_log_page_size(aer->ctrlr,
|
|
aer->log_page_id);
|
|
memcpy(&aer->cpl, cpl, sizeof(*cpl));
|
|
nvme_ctrlr_cmd_get_log_page(aer->ctrlr, aer->log_page_id,
|
|
NVME_GLOBAL_NAMESPACE_TAG, aer->log_page_buffer,
|
|
aer->log_page_size, nvme_ctrlr_async_event_log_page_cb,
|
|
aer);
|
|
/* Wait to notify consumers until after log page is fetched. */
|
|
} else {
|
|
nvme_notify_async_consumers(aer->ctrlr, cpl, aer->log_page_id,
|
|
NULL, 0);
|
|
|
|
/*
|
|
* Repost another asynchronous event request to replace the one
|
|
* that just completed.
|
|
*/
|
|
nvme_ctrlr_construct_and_submit_aer(aer->ctrlr, aer);
|
|
}
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_construct_and_submit_aer(struct nvme_controller *ctrlr,
|
|
struct nvme_async_event_request *aer)
|
|
{
|
|
struct nvme_request *req;
|
|
|
|
aer->ctrlr = ctrlr;
|
|
req = nvme_allocate_request_null(nvme_ctrlr_async_event_cb, aer);
|
|
aer->req = req;
|
|
|
|
/*
|
|
* Disable timeout here, since asynchronous event requests should by
|
|
* nature never be timed out.
|
|
*/
|
|
req->timeout = FALSE;
|
|
req->cmd.opc = NVME_OPC_ASYNC_EVENT_REQUEST;
|
|
nvme_ctrlr_submit_admin_request(ctrlr, req);
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_configure_aer(struct nvme_controller *ctrlr)
|
|
{
|
|
union nvme_critical_warning_state state;
|
|
struct nvme_async_event_request *aer;
|
|
uint32_t i;
|
|
|
|
state.raw = 0xFF;
|
|
state.bits.reserved = 0;
|
|
nvme_ctrlr_cmd_set_async_event_config(ctrlr, state, NULL, NULL);
|
|
|
|
/* aerl is a zero-based value, so we need to add 1 here. */
|
|
ctrlr->num_aers = min(NVME_MAX_ASYNC_EVENTS, (ctrlr->cdata.aerl+1));
|
|
|
|
/* Chatham doesn't support AERs. */
|
|
if (pci_get_devid(ctrlr->dev) == CHATHAM_PCI_ID)
|
|
ctrlr->num_aers = 0;
|
|
|
|
for (i = 0; i < ctrlr->num_aers; i++) {
|
|
aer = &ctrlr->aer[i];
|
|
nvme_ctrlr_construct_and_submit_aer(ctrlr, aer);
|
|
}
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_configure_int_coalescing(struct nvme_controller *ctrlr)
|
|
{
|
|
|
|
ctrlr->int_coal_time = 0;
|
|
TUNABLE_INT_FETCH("hw.nvme.int_coal_time",
|
|
&ctrlr->int_coal_time);
|
|
|
|
ctrlr->int_coal_threshold = 0;
|
|
TUNABLE_INT_FETCH("hw.nvme.int_coal_threshold",
|
|
&ctrlr->int_coal_threshold);
|
|
|
|
nvme_ctrlr_cmd_set_interrupt_coalescing(ctrlr, ctrlr->int_coal_time,
|
|
ctrlr->int_coal_threshold, NULL, NULL);
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_start(void *ctrlr_arg)
|
|
{
|
|
struct nvme_controller *ctrlr = ctrlr_arg;
|
|
int i;
|
|
|
|
nvme_qpair_reset(&ctrlr->adminq);
|
|
for (i = 0; i < ctrlr->num_io_queues; i++)
|
|
nvme_qpair_reset(&ctrlr->ioq[i]);
|
|
|
|
nvme_admin_qpair_enable(&ctrlr->adminq);
|
|
|
|
if (nvme_ctrlr_identify(ctrlr) != 0) {
|
|
nvme_ctrlr_fail(ctrlr);
|
|
return;
|
|
}
|
|
|
|
if (nvme_ctrlr_set_num_qpairs(ctrlr) != 0) {
|
|
nvme_ctrlr_fail(ctrlr);
|
|
return;
|
|
}
|
|
|
|
if (nvme_ctrlr_create_qpairs(ctrlr) != 0) {
|
|
nvme_ctrlr_fail(ctrlr);
|
|
return;
|
|
}
|
|
|
|
if (nvme_ctrlr_construct_namespaces(ctrlr) != 0) {
|
|
nvme_ctrlr_fail(ctrlr);
|
|
return;
|
|
}
|
|
|
|
nvme_ctrlr_configure_aer(ctrlr);
|
|
nvme_ctrlr_configure_int_coalescing(ctrlr);
|
|
|
|
for (i = 0; i < ctrlr->num_io_queues; i++)
|
|
nvme_io_qpair_enable(&ctrlr->ioq[i]);
|
|
|
|
/*
|
|
* Clear software progress marker to 0, to indicate to pre-boot
|
|
* software that OS driver load was successful.
|
|
*
|
|
* Chatham does not support this feature.
|
|
*/
|
|
if (pci_get_devid(ctrlr->dev) != CHATHAM_PCI_ID)
|
|
nvme_ctrlr_cmd_set_feature(ctrlr,
|
|
NVME_FEAT_SOFTWARE_PROGRESS_MARKER, 0, NULL, 0, NULL, NULL);
|
|
}
|
|
|
|
void
|
|
nvme_ctrlr_start_config_hook(void *arg)
|
|
{
|
|
struct nvme_controller *ctrlr = arg;
|
|
|
|
nvme_ctrlr_start(ctrlr);
|
|
config_intrhook_disestablish(&ctrlr->config_hook);
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_reset_task(void *arg, int pending)
|
|
{
|
|
struct nvme_controller *ctrlr = arg;
|
|
int status;
|
|
|
|
nvme_printf(ctrlr, "resetting controller\n");
|
|
status = nvme_ctrlr_hw_reset(ctrlr);
|
|
/*
|
|
* Use pause instead of DELAY, so that we yield to any nvme interrupt
|
|
* handlers on this CPU that were blocked on a qpair lock. We want
|
|
* all nvme interrupts completed before proceeding with restarting the
|
|
* controller.
|
|
*
|
|
* XXX - any way to guarantee the interrupt handlers have quiesced?
|
|
*/
|
|
pause("nvmereset", hz / 10);
|
|
if (status == 0)
|
|
nvme_ctrlr_start(ctrlr);
|
|
else
|
|
nvme_ctrlr_fail(ctrlr);
|
|
|
|
atomic_cmpset_32(&ctrlr->is_resetting, 1, 0);
|
|
}
|
|
|
|
static void
|
|
nvme_ctrlr_intx_handler(void *arg)
|
|
{
|
|
struct nvme_controller *ctrlr = arg;
|
|
|
|
nvme_mmio_write_4(ctrlr, intms, 1);
|
|
|
|
nvme_qpair_process_completions(&ctrlr->adminq);
|
|
|
|
if (ctrlr->ioq[0].cpl)
|
|
nvme_qpair_process_completions(&ctrlr->ioq[0]);
|
|
|
|
nvme_mmio_write_4(ctrlr, intmc, 1);
|
|
}
|
|
|
|
static int
|
|
nvme_ctrlr_configure_intx(struct nvme_controller *ctrlr)
|
|
{
|
|
|
|
ctrlr->num_io_queues = 1;
|
|
ctrlr->per_cpu_io_queues = 0;
|
|
ctrlr->rid = 0;
|
|
ctrlr->res = bus_alloc_resource_any(ctrlr->dev, SYS_RES_IRQ,
|
|
&ctrlr->rid, RF_SHAREABLE | RF_ACTIVE);
|
|
|
|
if (ctrlr->res == NULL) {
|
|
nvme_printf(ctrlr, "unable to allocate shared IRQ\n");
|
|
return (ENOMEM);
|
|
}
|
|
|
|
bus_setup_intr(ctrlr->dev, ctrlr->res,
|
|
INTR_TYPE_MISC | INTR_MPSAFE, NULL, nvme_ctrlr_intx_handler,
|
|
ctrlr, &ctrlr->tag);
|
|
|
|
if (ctrlr->tag == NULL) {
|
|
nvme_printf(ctrlr, "unable to setup intx handler\n");
|
|
return (ENOMEM);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
nvme_pt_done(void *arg, const struct nvme_completion *cpl)
|
|
{
|
|
struct nvme_pt_command *pt = arg;
|
|
|
|
bzero(&pt->cpl, sizeof(pt->cpl));
|
|
pt->cpl.cdw0 = cpl->cdw0;
|
|
pt->cpl.status = cpl->status;
|
|
pt->cpl.status.p = 0;
|
|
|
|
mtx_lock(pt->driver_lock);
|
|
wakeup(pt);
|
|
mtx_unlock(pt->driver_lock);
|
|
}
|
|
|
|
int
|
|
nvme_ctrlr_passthrough_cmd(struct nvme_controller *ctrlr,
|
|
struct nvme_pt_command *pt, uint32_t nsid, int is_user_buffer,
|
|
int is_admin_cmd)
|
|
{
|
|
struct nvme_request *req;
|
|
struct mtx *mtx;
|
|
struct buf *buf = NULL;
|
|
int ret = 0;
|
|
|
|
if (pt->len > 0) {
|
|
if (pt->len > ctrlr->max_xfer_size) {
|
|
nvme_printf(ctrlr, "pt->len (%d) "
|
|
"exceeds max_xfer_size (%d)\n", pt->len,
|
|
ctrlr->max_xfer_size);
|
|
return EIO;
|
|
}
|
|
if (is_user_buffer) {
|
|
/*
|
|
* Ensure the user buffer is wired for the duration of
|
|
* this passthrough command.
|
|
*/
|
|
PHOLD(curproc);
|
|
buf = getpbuf(NULL);
|
|
buf->b_saveaddr = buf->b_data;
|
|
buf->b_data = pt->buf;
|
|
buf->b_bufsize = pt->len;
|
|
buf->b_iocmd = pt->is_read ? BIO_READ : BIO_WRITE;
|
|
#ifdef NVME_UNMAPPED_BIO_SUPPORT
|
|
if (vmapbuf(buf, 1) < 0) {
|
|
#else
|
|
if (vmapbuf(buf) < 0) {
|
|
#endif
|
|
ret = EFAULT;
|
|
goto err;
|
|
}
|
|
req = nvme_allocate_request_vaddr(buf->b_data, pt->len,
|
|
nvme_pt_done, pt);
|
|
} else
|
|
req = nvme_allocate_request_vaddr(pt->buf, pt->len,
|
|
nvme_pt_done, pt);
|
|
} else
|
|
req = nvme_allocate_request_null(nvme_pt_done, pt);
|
|
|
|
req->cmd.opc = pt->cmd.opc;
|
|
req->cmd.cdw10 = pt->cmd.cdw10;
|
|
req->cmd.cdw11 = pt->cmd.cdw11;
|
|
req->cmd.cdw12 = pt->cmd.cdw12;
|
|
req->cmd.cdw13 = pt->cmd.cdw13;
|
|
req->cmd.cdw14 = pt->cmd.cdw14;
|
|
req->cmd.cdw15 = pt->cmd.cdw15;
|
|
|
|
req->cmd.nsid = nsid;
|
|
|
|
if (is_admin_cmd)
|
|
mtx = &ctrlr->lock;
|
|
else
|
|
mtx = &ctrlr->ns[nsid-1].lock;
|
|
|
|
mtx_lock(mtx);
|
|
pt->driver_lock = mtx;
|
|
|
|
if (is_admin_cmd)
|
|
nvme_ctrlr_submit_admin_request(ctrlr, req);
|
|
else
|
|
nvme_ctrlr_submit_io_request(ctrlr, req);
|
|
|
|
mtx_sleep(pt, mtx, PRIBIO, "nvme_pt", 0);
|
|
mtx_unlock(mtx);
|
|
|
|
pt->driver_lock = NULL;
|
|
|
|
err:
|
|
if (buf != NULL) {
|
|
relpbuf(buf, NULL);
|
|
PRELE(curproc);
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
nvme_ctrlr_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int flag,
|
|
struct thread *td)
|
|
{
|
|
struct nvme_controller *ctrlr;
|
|
struct nvme_pt_command *pt;
|
|
|
|
ctrlr = cdev->si_drv1;
|
|
|
|
switch (cmd) {
|
|
case NVME_RESET_CONTROLLER:
|
|
nvme_ctrlr_reset(ctrlr);
|
|
break;
|
|
case NVME_PASSTHROUGH_CMD:
|
|
pt = (struct nvme_pt_command *)arg;
|
|
return (nvme_ctrlr_passthrough_cmd(ctrlr, pt, pt->cmd.nsid,
|
|
1 /* is_user_buffer */, 1 /* is_admin_cmd */));
|
|
default:
|
|
return (ENOTTY);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct cdevsw nvme_ctrlr_cdevsw = {
|
|
.d_version = D_VERSION,
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|
.d_flags = 0,
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|
.d_ioctl = nvme_ctrlr_ioctl
|
|
};
|
|
|
|
int
|
|
nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev)
|
|
{
|
|
union cap_lo_register cap_lo;
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|
union cap_hi_register cap_hi;
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|
int num_vectors, per_cpu_io_queues, status = 0;
|
|
int timeout_period;
|
|
|
|
ctrlr->dev = dev;
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|
|
|
mtx_init(&ctrlr->lock, "nvme ctrlr lock", NULL, MTX_DEF);
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|
|
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status = nvme_ctrlr_allocate_bar(ctrlr);
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|
|
|
if (status != 0)
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|
return (status);
|
|
|
|
#ifdef CHATHAM2
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|
if (pci_get_devid(dev) == CHATHAM_PCI_ID) {
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|
status = nvme_ctrlr_allocate_chatham_bar(ctrlr);
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|
if (status != 0)
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|
return (status);
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|
nvme_ctrlr_setup_chatham(ctrlr);
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|
}
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|
#endif
|
|
|
|
/*
|
|
* Software emulators may set the doorbell stride to something
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|
* other than zero, but this driver is not set up to handle that.
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|
*/
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|
cap_hi.raw = nvme_mmio_read_4(ctrlr, cap_hi);
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if (cap_hi.bits.dstrd != 0)
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|
return (ENXIO);
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|
|
|
ctrlr->min_page_size = 1 << (12 + cap_hi.bits.mpsmin);
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|
|
|
/* Get ready timeout value from controller, in units of 500ms. */
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|
cap_lo.raw = nvme_mmio_read_4(ctrlr, cap_lo);
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ctrlr->ready_timeout_in_ms = cap_lo.bits.to * 500;
|
|
|
|
timeout_period = NVME_DEFAULT_TIMEOUT_PERIOD;
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|
TUNABLE_INT_FETCH("hw.nvme.timeout_period", &timeout_period);
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|
timeout_period = min(timeout_period, NVME_MAX_TIMEOUT_PERIOD);
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|
timeout_period = max(timeout_period, NVME_MIN_TIMEOUT_PERIOD);
|
|
ctrlr->timeout_period = timeout_period;
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|
|
|
nvme_retry_count = NVME_DEFAULT_RETRY_COUNT;
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TUNABLE_INT_FETCH("hw.nvme.retry_count", &nvme_retry_count);
|
|
|
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per_cpu_io_queues = 1;
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|
TUNABLE_INT_FETCH("hw.nvme.per_cpu_io_queues", &per_cpu_io_queues);
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ctrlr->per_cpu_io_queues = per_cpu_io_queues ? TRUE : FALSE;
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|
|
|
if (ctrlr->per_cpu_io_queues)
|
|
ctrlr->num_io_queues = mp_ncpus;
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else
|
|
ctrlr->num_io_queues = 1;
|
|
|
|
ctrlr->force_intx = 0;
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TUNABLE_INT_FETCH("hw.nvme.force_intx", &ctrlr->force_intx);
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|
|
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ctrlr->enable_aborts = 0;
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TUNABLE_INT_FETCH("hw.nvme.enable_aborts", &ctrlr->enable_aborts);
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|
|
|
ctrlr->msix_enabled = 1;
|
|
|
|
if (ctrlr->force_intx) {
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ctrlr->msix_enabled = 0;
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|
goto intx;
|
|
}
|
|
|
|
/* One vector per IO queue, plus one vector for admin queue. */
|
|
num_vectors = ctrlr->num_io_queues + 1;
|
|
|
|
if (pci_msix_count(dev) < num_vectors) {
|
|
ctrlr->msix_enabled = 0;
|
|
goto intx;
|
|
}
|
|
|
|
if (pci_alloc_msix(dev, &num_vectors) != 0)
|
|
ctrlr->msix_enabled = 0;
|
|
|
|
intx:
|
|
|
|
if (!ctrlr->msix_enabled)
|
|
nvme_ctrlr_configure_intx(ctrlr);
|
|
|
|
ctrlr->max_xfer_size = NVME_MAX_XFER_SIZE;
|
|
nvme_ctrlr_construct_admin_qpair(ctrlr);
|
|
status = nvme_ctrlr_construct_io_qpairs(ctrlr);
|
|
|
|
if (status != 0)
|
|
return (status);
|
|
|
|
ctrlr->cdev = make_dev(&nvme_ctrlr_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
|
|
"nvme%d", device_get_unit(dev));
|
|
|
|
if (ctrlr->cdev == NULL)
|
|
return (ENXIO);
|
|
|
|
ctrlr->cdev->si_drv1 = (void *)ctrlr;
|
|
|
|
ctrlr->taskqueue = taskqueue_create("nvme_taskq", M_WAITOK,
|
|
taskqueue_thread_enqueue, &ctrlr->taskqueue);
|
|
taskqueue_start_threads(&ctrlr->taskqueue, 1, PI_DISK, "nvme taskq");
|
|
|
|
ctrlr->is_resetting = 0;
|
|
TASK_INIT(&ctrlr->reset_task, 0, nvme_ctrlr_reset_task, ctrlr);
|
|
|
|
TASK_INIT(&ctrlr->fail_req_task, 0, nvme_ctrlr_fail_req_task, ctrlr);
|
|
STAILQ_INIT(&ctrlr->fail_req);
|
|
ctrlr->is_failed = FALSE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
nvme_ctrlr_destruct(struct nvme_controller *ctrlr, device_t dev)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* Notify the controller of a shutdown, even though this is due to
|
|
* a driver unload, not a system shutdown (this path is not invoked
|
|
* during shutdown). This ensures the controller receives a
|
|
* shutdown notification in case the system is shutdown before
|
|
* reloading the driver.
|
|
*
|
|
* Chatham does not let you re-enable the controller after shutdown
|
|
* notification has been received, so do not send it in this case.
|
|
* This is OK because Chatham does not depend on the shutdown
|
|
* notification anyways.
|
|
*/
|
|
if (pci_get_devid(ctrlr->dev) != CHATHAM_PCI_ID)
|
|
nvme_ctrlr_shutdown(ctrlr);
|
|
|
|
nvme_ctrlr_disable(ctrlr);
|
|
taskqueue_free(ctrlr->taskqueue);
|
|
|
|
for (i = 0; i < NVME_MAX_NAMESPACES; i++)
|
|
nvme_ns_destruct(&ctrlr->ns[i]);
|
|
|
|
if (ctrlr->cdev)
|
|
destroy_dev(ctrlr->cdev);
|
|
|
|
for (i = 0; i < ctrlr->num_io_queues; i++) {
|
|
nvme_io_qpair_destroy(&ctrlr->ioq[i]);
|
|
}
|
|
|
|
free(ctrlr->ioq, M_NVME);
|
|
|
|
nvme_admin_qpair_destroy(&ctrlr->adminq);
|
|
|
|
if (ctrlr->resource != NULL) {
|
|
bus_release_resource(dev, SYS_RES_MEMORY,
|
|
ctrlr->resource_id, ctrlr->resource);
|
|
}
|
|
|
|
if (ctrlr->bar4_resource != NULL) {
|
|
bus_release_resource(dev, SYS_RES_MEMORY,
|
|
ctrlr->bar4_resource_id, ctrlr->bar4_resource);
|
|
}
|
|
|
|
#ifdef CHATHAM2
|
|
if (ctrlr->chatham_resource != NULL) {
|
|
bus_release_resource(dev, SYS_RES_MEMORY,
|
|
ctrlr->chatham_resource_id, ctrlr->chatham_resource);
|
|
}
|
|
#endif
|
|
|
|
if (ctrlr->tag)
|
|
bus_teardown_intr(ctrlr->dev, ctrlr->res, ctrlr->tag);
|
|
|
|
if (ctrlr->res)
|
|
bus_release_resource(ctrlr->dev, SYS_RES_IRQ,
|
|
rman_get_rid(ctrlr->res), ctrlr->res);
|
|
|
|
if (ctrlr->msix_enabled)
|
|
pci_release_msi(dev);
|
|
}
|
|
|
|
void
|
|
nvme_ctrlr_shutdown(struct nvme_controller *ctrlr)
|
|
{
|
|
union cc_register cc;
|
|
union csts_register csts;
|
|
int ticks = 0;
|
|
|
|
cc.raw = nvme_mmio_read_4(ctrlr, cc);
|
|
cc.bits.shn = NVME_SHN_NORMAL;
|
|
nvme_mmio_write_4(ctrlr, cc, cc.raw);
|
|
csts.raw = nvme_mmio_read_4(ctrlr, csts);
|
|
while ((csts.bits.shst != NVME_SHST_COMPLETE) && (ticks++ < 5*hz)) {
|
|
pause("nvme shn", 1);
|
|
csts.raw = nvme_mmio_read_4(ctrlr, csts);
|
|
}
|
|
if (csts.bits.shst != NVME_SHST_COMPLETE)
|
|
nvme_printf(ctrlr, "did not complete shutdown within 5 seconds "
|
|
"of notification\n");
|
|
}
|
|
|
|
void
|
|
nvme_ctrlr_submit_admin_request(struct nvme_controller *ctrlr,
|
|
struct nvme_request *req)
|
|
{
|
|
|
|
nvme_qpair_submit_request(&ctrlr->adminq, req);
|
|
}
|
|
|
|
void
|
|
nvme_ctrlr_submit_io_request(struct nvme_controller *ctrlr,
|
|
struct nvme_request *req)
|
|
{
|
|
struct nvme_qpair *qpair;
|
|
|
|
if (ctrlr->per_cpu_io_queues)
|
|
qpair = &ctrlr->ioq[curcpu];
|
|
else
|
|
qpair = &ctrlr->ioq[0];
|
|
|
|
nvme_qpair_submit_request(qpair, req);
|
|
}
|
|
|
|
device_t
|
|
nvme_ctrlr_get_device(struct nvme_controller *ctrlr)
|
|
{
|
|
|
|
return (ctrlr->dev);
|
|
}
|
|
|
|
const struct nvme_controller_data *
|
|
nvme_ctrlr_get_data(struct nvme_controller *ctrlr)
|
|
{
|
|
|
|
return (&ctrlr->cdata);
|
|
}
|