7cf8d63c88
Add a quirk to flag AHCI attachment to the controller. This is for any of the strategies for attaching nvme devices as children of the AHCI device for Intel's RAID devices. This also has a side effect of cleaning up resource allocation from failed nvme_attach calls now. Sponsored by: Netflix Reviewed by: mav Differential Revision: https://reviews.freebsd.org/D33285
132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/*-
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* Copyright (C) 2017 Olivier Houchard
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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/proc.h>
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#include <sys/smp.h>
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#include "nvme_private.h"
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static int nvme_ahci_probe(device_t dev);
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static int nvme_ahci_attach(device_t dev);
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static int nvme_ahci_detach(device_t dev);
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static device_method_t nvme_ahci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, nvme_ahci_probe),
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DEVMETHOD(device_attach, nvme_ahci_attach),
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DEVMETHOD(device_detach, nvme_ahci_detach),
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DEVMETHOD(device_shutdown, nvme_shutdown),
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{ 0, 0 }
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};
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static driver_t nvme_ahci_driver = {
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"nvme",
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nvme_ahci_methods,
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sizeof(struct nvme_controller),
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};
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DRIVER_MODULE(nvme, ahci, nvme_ahci_driver, nvme_devclass, NULL, 0);
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static int
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nvme_ahci_probe (device_t device)
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{
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return (0);
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}
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static int
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nvme_ahci_attach(device_t dev)
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{
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struct nvme_controller*ctrlr = DEVICE2SOFTC(dev);
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int ret;
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/* Map MMIO registers */
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ctrlr->resource_id = 0;
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ctrlr->resource = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&ctrlr->resource_id, RF_ACTIVE);
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if(ctrlr->resource == NULL) {
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nvme_printf(ctrlr, "unable to allocate mem resource\n");
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ret = ENOMEM;
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goto bad;
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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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/* Allocate and setup IRQ */
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ctrlr->rid = 0;
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ctrlr->res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
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&ctrlr->rid, RF_SHAREABLE | RF_ACTIVE);
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if (ctrlr->res == NULL) {
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nvme_printf(ctrlr, "unable to allocate shared interrupt\n");
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ret = ENOMEM;
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goto bad;
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}
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ctrlr->msi_count = 0;
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ctrlr->num_io_queues = 1;
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if (bus_setup_intr(dev, ctrlr->res,
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INTR_TYPE_MISC | INTR_MPSAFE, NULL, nvme_ctrlr_shared_handler,
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ctrlr, &ctrlr->tag) != 0) {
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nvme_printf(ctrlr, "unable to setup shared interrupt\n");
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ret = ENOMEM;
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goto bad;
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}
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ctrlr->tag = (void *)0x1;
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/*
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* We're attached via this funky mechanism. Flag the controller so that
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* it avoids things that can't work when we do that, like asking for
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* PCI config space entries.
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*/
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ctrlr->quirks |= QUIRK_AHCI;
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return (nvme_attach(dev)); /* Note: failure frees resources */
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bad:
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if (ctrlr->resource != NULL) {
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bus_release_resource(dev, SYS_RES_MEMORY,
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ctrlr->resource_id, ctrlr->resource);
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}
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if (ctrlr->res)
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bus_release_resource(ctrlr->dev, SYS_RES_IRQ,
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rman_get_rid(ctrlr->res), ctrlr->res);
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return (ret);
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}
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static int
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nvme_ahci_detach(device_t dev)
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{
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return (nvme_detach(dev));
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}
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