f207ea1ade
Requeue the request if the controller is busy.
1145 lines
32 KiB
C
1145 lines
32 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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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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* $FreeBSD$
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*/
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/*
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* FreeBSD-specific code.
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*/
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#include <sys/param.h>
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#include <sys/cons.h>
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#include <machine/bus.h>
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#include <machine/clock.h>
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#include <machine/md_var.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <dev/twe/twe_compat.h>
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#include <geom/geom_disk.h>
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#include <dev/twe/twereg.h>
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#include <dev/twe/tweio.h>
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#include <dev/twe/twevar.h>
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#include <dev/twe/twe_tables.h>
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static devclass_t twe_devclass;
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#ifdef TWE_DEBUG
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static u_int32_t twed_bio_in;
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#define TWED_BIO_IN twed_bio_in++
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static u_int32_t twed_bio_out;
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#define TWED_BIO_OUT twed_bio_out++
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#else
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#define TWED_BIO_IN
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#define TWED_BIO_OUT
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#endif
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static void twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
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static void twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error);
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/********************************************************************************
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********************************************************************************
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Control device interface
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********************************************************************************
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********************************************************************************/
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static d_open_t twe_open;
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static d_close_t twe_close;
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static d_ioctl_t twe_ioctl_wrapper;
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#define TWE_CDEV_MAJOR 146
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static struct cdevsw twe_cdevsw = {
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.d_open = twe_open,
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.d_close = twe_close,
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.d_ioctl = twe_ioctl_wrapper,
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.d_name = "twe",
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.d_maj = TWE_CDEV_MAJOR,
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};
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/********************************************************************************
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* Accept an open operation on the control device.
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*/
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static int
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twe_open(dev_t dev, int flags, int fmt, d_thread_t *td)
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{
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int unit = minor(dev);
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struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
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sc->twe_state |= TWE_STATE_OPEN;
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return(0);
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}
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/********************************************************************************
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* Accept the last close on the control device.
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*/
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static int
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twe_close(dev_t dev, int flags, int fmt, d_thread_t *td)
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{
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int unit = minor(dev);
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struct twe_softc *sc = devclass_get_softc(twe_devclass, unit);
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sc->twe_state &= ~TWE_STATE_OPEN;
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return (0);
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}
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/********************************************************************************
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* Handle controller-specific control operations.
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*/
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static int
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twe_ioctl_wrapper(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, d_thread_t *td)
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{
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struct twe_softc *sc = (struct twe_softc *)dev->si_drv1;
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return(twe_ioctl(sc, cmd, addr));
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}
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/********************************************************************************
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********************************************************************************
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PCI device interface
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********************************************************************************
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********************************************************************************/
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static int twe_probe(device_t dev);
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static int twe_attach(device_t dev);
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static void twe_free(struct twe_softc *sc);
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static int twe_detach(device_t dev);
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static void twe_shutdown(device_t dev);
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static int twe_suspend(device_t dev);
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static int twe_resume(device_t dev);
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static void twe_pci_intr(void *arg);
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static void twe_intrhook(void *arg);
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static device_method_t twe_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, twe_probe),
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DEVMETHOD(device_attach, twe_attach),
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DEVMETHOD(device_detach, twe_detach),
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DEVMETHOD(device_shutdown, twe_shutdown),
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DEVMETHOD(device_suspend, twe_suspend),
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DEVMETHOD(device_resume, twe_resume),
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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DEVMETHOD(bus_driver_added, bus_generic_driver_added),
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{ 0, 0 }
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};
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static driver_t twe_pci_driver = {
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"twe",
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twe_methods,
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sizeof(struct twe_softc)
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};
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#ifdef TWE_OVERRIDE
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DRIVER_MODULE(Xtwe, pci, twe_pci_driver, twe_devclass, 0, 0);
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#else
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DRIVER_MODULE(twe, pci, twe_pci_driver, twe_devclass, 0, 0);
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#endif
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/********************************************************************************
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* Match a 3ware Escalade ATA RAID controller.
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*/
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static int
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twe_probe(device_t dev)
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{
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debug_called(4);
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if ((pci_get_vendor(dev) == TWE_VENDOR_ID) &&
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((pci_get_device(dev) == TWE_DEVICE_ID) ||
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(pci_get_device(dev) == TWE_DEVICE_ID_ASIC))) {
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device_set_desc(dev, TWE_DEVICE_NAME);
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#ifdef TWE_OVERRIDE
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return(0);
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#else
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return(-10);
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#endif
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}
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return(ENXIO);
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}
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/********************************************************************************
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* Allocate resources, initialise the controller.
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*/
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static int
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twe_attach(device_t dev)
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{
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struct twe_softc *sc;
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int rid, error;
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u_int32_t command;
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debug_called(4);
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/*
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* Initialise the softc structure.
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*/
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sc = device_get_softc(dev);
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sc->twe_dev = dev;
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sysctl_ctx_init(&sc->sysctl_ctx);
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sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
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SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
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device_get_nameunit(dev), CTLFLAG_RD, 0, "");
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if (sc->sysctl_tree == NULL) {
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twe_printf(sc, "cannot add sysctl tree node\n");
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return (ENXIO);
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}
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SYSCTL_ADD_STRING(&sc->sysctl_ctx, SYSCTL_CHILDREN(sc->sysctl_tree),
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OID_AUTO, "driver_version", CTLFLAG_RD, "$Revision$", 0,
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"TWE driver version");
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/*
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* Make sure we are going to be able to talk to this board.
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*/
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command = pci_read_config(dev, PCIR_COMMAND, 2);
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if ((command & PCIM_CMD_PORTEN) == 0) {
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twe_printf(sc, "register window not available\n");
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return(ENXIO);
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}
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/*
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* Force the busmaster enable bit on, in case the BIOS forgot.
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*/
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command |= PCIM_CMD_BUSMASTEREN;
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pci_write_config(dev, PCIR_COMMAND, command, 2);
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/*
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* Allocate the PCI register window.
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*/
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rid = TWE_IO_CONFIG_REG;
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if ((sc->twe_io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE)) == NULL) {
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twe_printf(sc, "can't allocate register window\n");
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twe_free(sc);
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return(ENXIO);
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}
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sc->twe_btag = rman_get_bustag(sc->twe_io);
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sc->twe_bhandle = rman_get_bushandle(sc->twe_io);
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/*
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* Allocate the parent bus DMA tag appropriate for PCI.
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*/
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if (bus_dma_tag_create(NULL, /* parent */
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1, 0, /* alignment, boundary */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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MAXBSIZE, TWE_MAX_SGL_LENGTH, /* maxsize, nsegments */
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BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
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BUS_DMA_ALLOCNOW, /* flags */
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NULL, /* lockfunc */
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NULL, /* lockarg */
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&sc->twe_parent_dmat)) {
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twe_printf(sc, "can't allocate parent DMA tag\n");
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twe_free(sc);
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return(ENOMEM);
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}
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/*
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* Allocate and connect our interrupt.
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*/
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rid = 0;
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if ((sc->twe_irq = bus_alloc_resource(sc->twe_dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
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twe_printf(sc, "can't allocate interrupt\n");
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twe_free(sc);
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return(ENXIO);
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}
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if (bus_setup_intr(sc->twe_dev, sc->twe_irq, INTR_TYPE_BIO | INTR_ENTROPY, twe_pci_intr, sc, &sc->twe_intr)) {
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twe_printf(sc, "can't set up interrupt\n");
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twe_free(sc);
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return(ENXIO);
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}
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/*
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* Create DMA tag for mapping command's into controller-addressable space.
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*/
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if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
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1, 0, /* alignment, boundary */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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sizeof(TWE_Command) *
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TWE_Q_LENGTH, 1, /* maxsize, nsegments */
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BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
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BUS_DMA_ALLOCNOW, /* flags */
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NULL, /* lockfunc */
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NULL, /* lockarg */
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&sc->twe_cmd_dmat)) {
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twe_printf(sc, "can't allocate data buffer DMA tag\n");
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twe_free(sc);
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return(ENOMEM);
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}
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/*
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* Allocate memory and make it available for DMA.
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*/
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if (bus_dmamem_alloc(sc->twe_cmd_dmat, (void **)&sc->twe_cmd,
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BUS_DMA_NOWAIT, &sc->twe_cmdmap)) {
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twe_printf(sc, "can't allocate command memory\n");
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return(ENOMEM);
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}
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bus_dmamap_load(sc->twe_cmd_dmat, sc->twe_cmdmap, sc->twe_cmd,
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sizeof(TWE_Command) * TWE_Q_LENGTH,
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twe_setup_request_dmamap, sc, 0);
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bzero(sc->twe_cmd, sizeof(TWE_Command) * TWE_Q_LENGTH);
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/*
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* Create DMA tag for mapping objects into controller-addressable space.
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*/
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if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
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1, 0, /* alignment, boundary */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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MAXBSIZE, TWE_MAX_SGL_LENGTH,/* maxsize, nsegments */
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BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
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0, /* flags */
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busdma_lock_mutex, /* lockfunc */
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&Giant, /* lockarg */
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&sc->twe_buffer_dmat)) {
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twe_printf(sc, "can't allocate data buffer DMA tag\n");
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twe_free(sc);
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return(ENOMEM);
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}
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/*
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* Create DMA tag for mapping objects into controller-addressable space.
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*/
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if (bus_dma_tag_create(sc->twe_parent_dmat, /* parent */
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1, 0, /* alignment, boundary */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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MAXBSIZE, 1, /* maxsize, nsegments */
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BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
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BUS_DMA_ALLOCNOW, /* flags */
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NULL, /* lockfunc */
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NULL, /* lockarg */
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&sc->twe_immediate_dmat)) {
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twe_printf(sc, "can't allocate data buffer DMA tag\n");
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twe_free(sc);
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return(ENOMEM);
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}
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/*
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* Allocate memory for requests which cannot sleep or support continuation.
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*/
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if (bus_dmamem_alloc(sc->twe_immediate_dmat, (void **)&sc->twe_immediate,
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BUS_DMA_NOWAIT, &sc->twe_immediate_map)) {
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twe_printf(sc, "can't allocate memory for immediate requests\n");
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return(ENOMEM);
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}
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/*
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* Initialise the controller and driver core.
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*/
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if ((error = twe_setup(sc))) {
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twe_free(sc);
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return(error);
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}
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/*
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* Print some information about the controller and configuration.
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*/
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twe_describe_controller(sc);
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/*
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* Create the control device.
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*/
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sc->twe_dev_t = make_dev(&twe_cdevsw, device_get_unit(sc->twe_dev), UID_ROOT, GID_OPERATOR,
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S_IRUSR | S_IWUSR, "twe%d", device_get_unit(sc->twe_dev));
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sc->twe_dev_t->si_drv1 = sc;
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/*
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* Schedule ourselves to bring the controller up once interrupts are available.
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* This isn't strictly necessary, since we disable interrupts while probing the
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* controller, but it is more in keeping with common practice for other disk
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* devices.
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*/
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sc->twe_ich.ich_func = twe_intrhook;
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sc->twe_ich.ich_arg = sc;
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if (config_intrhook_establish(&sc->twe_ich) != 0) {
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twe_printf(sc, "can't establish configuration hook\n");
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twe_free(sc);
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return(ENXIO);
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}
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return(0);
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}
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/********************************************************************************
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* Free all of the resources associated with (sc).
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*
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* Should not be called if the controller is active.
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*/
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static void
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twe_free(struct twe_softc *sc)
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{
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struct twe_request *tr;
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debug_called(4);
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/* throw away any command buffers */
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while ((tr = twe_dequeue_free(sc)) != NULL)
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twe_free_request(tr);
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if (sc->twe_cmd != NULL) {
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bus_dmamap_unload(sc->twe_cmd_dmat, sc->twe_cmdmap);
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bus_dmamem_free(sc->twe_cmd_dmat, sc->twe_cmd, sc->twe_cmdmap);
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}
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if (sc->twe_immediate != NULL) {
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bus_dmamap_unload(sc->twe_immediate_dmat, sc->twe_immediate_map);
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bus_dmamem_free(sc->twe_immediate_dmat, sc->twe_immediate,
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sc->twe_immediate_map);
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}
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if (sc->twe_immediate_dmat)
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bus_dma_tag_destroy(sc->twe_immediate_dmat);
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/* destroy the data-transfer DMA tag */
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if (sc->twe_buffer_dmat)
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bus_dma_tag_destroy(sc->twe_buffer_dmat);
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/* disconnect the interrupt handler */
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if (sc->twe_intr)
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bus_teardown_intr(sc->twe_dev, sc->twe_irq, sc->twe_intr);
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if (sc->twe_irq != NULL)
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bus_release_resource(sc->twe_dev, SYS_RES_IRQ, 0, sc->twe_irq);
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/* destroy the parent DMA tag */
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if (sc->twe_parent_dmat)
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bus_dma_tag_destroy(sc->twe_parent_dmat);
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/* release the register window mapping */
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if (sc->twe_io != NULL)
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bus_release_resource(sc->twe_dev, SYS_RES_IOPORT, TWE_IO_CONFIG_REG, sc->twe_io);
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/* destroy control device */
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if (sc->twe_dev_t != (dev_t)NULL)
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destroy_dev(sc->twe_dev_t);
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sysctl_ctx_free(&sc->sysctl_ctx);
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}
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/********************************************************************************
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* Disconnect from the controller completely, in preparation for unload.
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*/
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static int
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twe_detach(device_t dev)
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{
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struct twe_softc *sc = device_get_softc(dev);
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int s, error;
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debug_called(4);
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error = EBUSY;
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s = splbio();
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if (sc->twe_state & TWE_STATE_OPEN)
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goto out;
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/*
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* Shut the controller down.
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*/
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twe_shutdown(dev);
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twe_free(sc);
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error = 0;
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out:
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splx(s);
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return(error);
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}
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/********************************************************************************
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* Bring the controller down to a dormant state and detach all child devices.
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*
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* Note that we can assume that the bioq on the controller is empty, as we won't
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* allow shutdown if any device is open.
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*/
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static void
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twe_shutdown(device_t dev)
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{
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struct twe_softc *sc = device_get_softc(dev);
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int i, s;
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debug_called(4);
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s = splbio();
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/*
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* Delete all our child devices.
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*/
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for (i = 0; i < TWE_MAX_UNITS; i++) {
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twe_detach_drive(sc, i);
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}
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/*
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|
* Bring the controller down.
|
|
*/
|
|
twe_deinit(sc);
|
|
|
|
splx(s);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Bring the controller to a quiescent state, ready for system suspend.
|
|
*/
|
|
static int
|
|
twe_suspend(device_t dev)
|
|
{
|
|
struct twe_softc *sc = device_get_softc(dev);
|
|
int s;
|
|
|
|
debug_called(4);
|
|
|
|
s = splbio();
|
|
sc->twe_state |= TWE_STATE_SUSPEND;
|
|
|
|
twe_disable_interrupts(sc);
|
|
splx(s);
|
|
|
|
return(0);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Bring the controller back to a state ready for operation.
|
|
*/
|
|
static int
|
|
twe_resume(device_t dev)
|
|
{
|
|
struct twe_softc *sc = device_get_softc(dev);
|
|
|
|
debug_called(4);
|
|
|
|
sc->twe_state &= ~TWE_STATE_SUSPEND;
|
|
twe_enable_interrupts(sc);
|
|
|
|
return(0);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
* Take an interrupt, or be poked by other code to look for interrupt-worthy
|
|
* status.
|
|
*/
|
|
static void
|
|
twe_pci_intr(void *arg)
|
|
{
|
|
twe_intr((struct twe_softc *)arg);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Delayed-startup hook
|
|
*/
|
|
static void
|
|
twe_intrhook(void *arg)
|
|
{
|
|
struct twe_softc *sc = (struct twe_softc *)arg;
|
|
|
|
/* pull ourselves off the intrhook chain */
|
|
config_intrhook_disestablish(&sc->twe_ich);
|
|
|
|
/* call core startup routine */
|
|
twe_init(sc);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Given a detected drive, attach it to the bio interface.
|
|
*
|
|
* This is called from twe_init.
|
|
*/
|
|
void
|
|
twe_attach_drive(struct twe_softc *sc, struct twe_drive *dr)
|
|
{
|
|
char buf[80];
|
|
int error;
|
|
|
|
dr->td_disk = device_add_child(sc->twe_dev, NULL, -1);
|
|
if (dr->td_disk == NULL) {
|
|
twe_printf(sc, "device_add_child failed\n");
|
|
return;
|
|
}
|
|
device_set_ivars(dr->td_disk, dr);
|
|
|
|
/*
|
|
* XXX It would make sense to test the online/initialising bits, but they seem to be
|
|
* always set...
|
|
*/
|
|
sprintf(buf, "Unit %d, %s, %s",
|
|
dr->td_unit,
|
|
twe_describe_code(twe_table_unittype, dr->td_type),
|
|
twe_describe_code(twe_table_unitstate, dr->td_state & TWE_PARAM_UNITSTATUS_MASK));
|
|
device_set_desc_copy(dr->td_disk, buf);
|
|
|
|
if ((error = bus_generic_attach(sc->twe_dev)) != 0)
|
|
twe_printf(sc, "bus_generic_attach returned %d\n", error);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Detach the specified unit if it exsists
|
|
*
|
|
* This is called from twe_del_unit.
|
|
*/
|
|
void
|
|
twe_detach_drive(struct twe_softc *sc, int unit)
|
|
{
|
|
|
|
if (sc->twe_drive[unit].td_disk != 0) {
|
|
if (device_delete_child(sc->twe_dev, sc->twe_drive[unit].td_disk) != 0)
|
|
twe_printf(sc, "failed to delete unit %d\n", unit);
|
|
sc->twe_drive[unit].td_disk = 0;
|
|
}
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Clear a PCI parity error.
|
|
*/
|
|
void
|
|
twe_clear_pci_parity_error(struct twe_softc *sc)
|
|
{
|
|
TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PARITY_ERROR);
|
|
pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PARITY_ERROR, 2);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Clear a PCI abort.
|
|
*/
|
|
void
|
|
twe_clear_pci_abort(struct twe_softc *sc)
|
|
{
|
|
TWE_CONTROL(sc, TWE_CONTROL_CLEAR_PCI_ABORT);
|
|
pci_write_config(sc->twe_dev, PCIR_STATUS, TWE_PCI_CLEAR_PCI_ABORT, 2);
|
|
}
|
|
|
|
/********************************************************************************
|
|
********************************************************************************
|
|
Disk device
|
|
********************************************************************************
|
|
********************************************************************************/
|
|
|
|
/*
|
|
* Disk device softc
|
|
*/
|
|
struct twed_softc
|
|
{
|
|
device_t twed_dev;
|
|
struct twe_softc *twed_controller; /* parent device softc */
|
|
struct twe_drive *twed_drive; /* drive data in parent softc */
|
|
struct disk twed_disk; /* generic disk handle */
|
|
};
|
|
|
|
/*
|
|
* Disk device bus interface
|
|
*/
|
|
static int twed_probe(device_t dev);
|
|
static int twed_attach(device_t dev);
|
|
static int twed_detach(device_t dev);
|
|
|
|
static device_method_t twed_methods[] = {
|
|
DEVMETHOD(device_probe, twed_probe),
|
|
DEVMETHOD(device_attach, twed_attach),
|
|
DEVMETHOD(device_detach, twed_detach),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t twed_driver = {
|
|
"twed",
|
|
twed_methods,
|
|
sizeof(struct twed_softc)
|
|
};
|
|
|
|
static devclass_t twed_devclass;
|
|
#ifdef TWE_OVERRIDE
|
|
DRIVER_MODULE(Xtwed, Xtwe, twed_driver, twed_devclass, 0, 0);
|
|
#else
|
|
DRIVER_MODULE(twed, twe, twed_driver, twed_devclass, 0, 0);
|
|
#endif
|
|
|
|
/*
|
|
* Disk device control interface.
|
|
*/
|
|
|
|
#ifdef FREEBSD_4
|
|
static int disks_registered = 0;
|
|
#endif
|
|
|
|
/********************************************************************************
|
|
* Handle open from generic layer.
|
|
*
|
|
* Note that this is typically only called by the diskslice code, and not
|
|
* for opens on subdevices (eg. slices, partitions).
|
|
*/
|
|
static int
|
|
twed_open(struct disk *dp)
|
|
{
|
|
struct twed_softc *sc = (struct twed_softc *)dp->d_drv1;
|
|
|
|
debug_called(4);
|
|
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
/* check that the controller is up and running */
|
|
if (sc->twed_controller->twe_state & TWE_STATE_SHUTDOWN)
|
|
return(ENXIO);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Handle an I/O request.
|
|
*/
|
|
static void
|
|
twed_strategy(twe_bio *bp)
|
|
{
|
|
struct twed_softc *sc = (struct twed_softc *)TWE_BIO_SOFTC(bp);
|
|
|
|
debug_called(4);
|
|
|
|
bp->bio_driver1 = &sc->twed_drive->td_unit;
|
|
TWED_BIO_IN;
|
|
|
|
/* bogus disk? */
|
|
if (sc == NULL) {
|
|
TWE_BIO_SET_ERROR(bp, EINVAL);
|
|
printf("twe: bio for invalid disk!\n");
|
|
TWE_BIO_DONE(bp);
|
|
TWED_BIO_OUT;
|
|
return;
|
|
}
|
|
|
|
/* perform accounting */
|
|
TWE_BIO_STATS_START(bp);
|
|
|
|
/* queue the bio on the controller */
|
|
twe_enqueue_bio(sc->twed_controller, bp);
|
|
|
|
/* poke the controller to start I/O */
|
|
twe_startio(sc->twed_controller);
|
|
return;
|
|
}
|
|
|
|
/********************************************************************************
|
|
* System crashdump support
|
|
*/
|
|
static int
|
|
twed_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
|
|
{
|
|
struct twed_softc *twed_sc;
|
|
struct twe_softc *twe_sc;
|
|
int error;
|
|
struct disk *dp;
|
|
|
|
dp = arg;
|
|
twed_sc = (struct twed_softc *)dp->d_drv1;
|
|
twe_sc = (struct twe_softc *)twed_sc->twed_controller;
|
|
if (!twed_sc || !twe_sc)
|
|
return(ENXIO);
|
|
|
|
if (length > 0) {
|
|
if ((error = twe_dump_blocks(twe_sc, twed_sc->twed_drive->td_unit, offset / TWE_BLOCK_SIZE, virtual, length / TWE_BLOCK_SIZE)) != 0)
|
|
return(error);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Handle completion of an I/O request.
|
|
*/
|
|
void
|
|
twed_intr(twe_bio *bp)
|
|
{
|
|
debug_called(4);
|
|
|
|
/* if no error, transfer completed */
|
|
if (!TWE_BIO_HAS_ERROR(bp))
|
|
TWE_BIO_RESID(bp) = 0;
|
|
|
|
TWE_BIO_STATS_END(bp);
|
|
TWE_BIO_DONE(bp);
|
|
TWED_BIO_OUT;
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Default probe stub.
|
|
*/
|
|
static int
|
|
twed_probe(device_t dev)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Attach a unit to the controller.
|
|
*/
|
|
static int
|
|
twed_attach(device_t dev)
|
|
{
|
|
struct twed_softc *sc;
|
|
device_t parent;
|
|
|
|
debug_called(4);
|
|
|
|
/* initialise our softc */
|
|
sc = device_get_softc(dev);
|
|
parent = device_get_parent(dev);
|
|
sc->twed_controller = (struct twe_softc *)device_get_softc(parent);
|
|
sc->twed_drive = device_get_ivars(dev);
|
|
sc->twed_dev = dev;
|
|
|
|
/* report the drive */
|
|
twed_printf(sc, "%uMB (%u sectors)\n",
|
|
sc->twed_drive->td_size / ((1024 * 1024) / TWE_BLOCK_SIZE),
|
|
sc->twed_drive->td_size);
|
|
|
|
/* attach a generic disk device to ourselves */
|
|
|
|
sc->twed_disk.d_open = twed_open;
|
|
sc->twed_disk.d_strategy = twed_strategy;
|
|
sc->twed_disk.d_dump = (dumper_t *)twed_dump;
|
|
sc->twed_disk.d_name = "twed";
|
|
sc->twed_disk.d_drv1 = sc;
|
|
sc->twed_disk.d_maxsize = (TWE_MAX_SGL_LENGTH - 1) * PAGE_SIZE;
|
|
sc->twed_disk.d_sectorsize = TWE_BLOCK_SIZE;
|
|
sc->twed_disk.d_mediasize = TWE_BLOCK_SIZE * (off_t)sc->twed_drive->td_size;
|
|
sc->twed_disk.d_fwsectors = sc->twed_drive->td_sectors;
|
|
sc->twed_disk.d_fwheads = sc->twed_drive->td_heads;
|
|
|
|
disk_create(device_get_unit(dev), &sc->twed_disk, 0, NULL, NULL);
|
|
#ifdef FREEBSD_4
|
|
disks_registered++;
|
|
#endif
|
|
|
|
/* set the maximum I/O size to the theoretical maximum allowed by the S/G list size */
|
|
|
|
return (0);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Disconnect ourselves from the system.
|
|
*/
|
|
static int
|
|
twed_detach(device_t dev)
|
|
{
|
|
struct twed_softc *sc = (struct twed_softc *)device_get_softc(dev);
|
|
|
|
debug_called(4);
|
|
|
|
if (sc->twed_disk.d_flags & DISKFLAG_OPEN)
|
|
return(EBUSY);
|
|
|
|
#ifdef FREEBSD_4
|
|
if (--disks_registered == 0)
|
|
cdevsw_remove(&tweddisk_cdevsw);
|
|
#else
|
|
disk_destroy(&sc->twed_disk);
|
|
#endif
|
|
|
|
return(0);
|
|
}
|
|
|
|
/********************************************************************************
|
|
********************************************************************************
|
|
Misc
|
|
********************************************************************************
|
|
********************************************************************************/
|
|
|
|
/********************************************************************************
|
|
* Allocate a command buffer
|
|
*/
|
|
MALLOC_DEFINE(TWE_MALLOC_CLASS, "twe commands", "twe commands");
|
|
|
|
struct twe_request *
|
|
twe_allocate_request(struct twe_softc *sc, int tag)
|
|
{
|
|
struct twe_request *tr;
|
|
|
|
if ((tr = malloc(sizeof(struct twe_request), TWE_MALLOC_CLASS, M_WAITOK)) == NULL) {
|
|
twe_printf(sc, "unable to allocate memory for tag %d\n", tag);
|
|
return(NULL);
|
|
}
|
|
bzero(tr, sizeof(*tr));
|
|
tr->tr_sc = sc;
|
|
tr->tr_tag = tag;
|
|
if (bus_dmamap_create(sc->twe_buffer_dmat, 0, &tr->tr_dmamap)) {
|
|
twe_free_request(tr);
|
|
twe_printf(sc, "unable to allocate dmamap for tag %d\n", tag);
|
|
return(NULL);
|
|
}
|
|
return(tr);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Permanently discard a command buffer.
|
|
*/
|
|
void
|
|
twe_free_request(struct twe_request *tr)
|
|
{
|
|
struct twe_softc *sc = tr->tr_sc;
|
|
|
|
debug_called(4);
|
|
|
|
bus_dmamap_destroy(sc->twe_buffer_dmat, tr->tr_dmamap);
|
|
free(tr, TWE_MALLOC_CLASS);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Map/unmap (tr)'s command and data in the controller's addressable space.
|
|
*
|
|
* These routines ensure that the data which the controller is going to try to
|
|
* access is actually visible to the controller, in a machine-independant
|
|
* fashion. Due to a hardware limitation, I/O buffers must be 512-byte aligned
|
|
* and we take care of that here as well.
|
|
*/
|
|
static void
|
|
twe_fillin_sgl(TWE_SG_Entry *sgl, bus_dma_segment_t *segs, int nsegments, int max_sgl)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < nsegments; i++) {
|
|
sgl[i].address = segs[i].ds_addr;
|
|
sgl[i].length = segs[i].ds_len;
|
|
}
|
|
for (; i < max_sgl; i++) { /* XXX necessary? */
|
|
sgl[i].address = 0;
|
|
sgl[i].length = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
twe_setup_data_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
|
|
{
|
|
struct twe_request *tr = (struct twe_request *)arg;
|
|
struct twe_softc *sc = tr->tr_sc;
|
|
TWE_Command *cmd = TWE_FIND_COMMAND(tr);
|
|
|
|
debug_called(4);
|
|
|
|
if (tr->tr_flags & TWE_CMD_MAPPED)
|
|
panic("already mapped command");
|
|
|
|
tr->tr_flags |= TWE_CMD_MAPPED;
|
|
|
|
/* save base of first segment in command (applicable if there only one segment) */
|
|
tr->tr_dataphys = segs[0].ds_addr;
|
|
|
|
/* correct command size for s/g list size */
|
|
cmd->generic.size += 2 * nsegments;
|
|
|
|
/*
|
|
* Due to the fact that parameter and I/O commands have the scatter/gather list in
|
|
* different places, we need to determine which sort of command this actually is
|
|
* before we can populate it correctly.
|
|
*/
|
|
switch(cmd->generic.opcode) {
|
|
case TWE_OP_GET_PARAM:
|
|
case TWE_OP_SET_PARAM:
|
|
cmd->generic.sgl_offset = 2;
|
|
twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
|
|
break;
|
|
case TWE_OP_READ:
|
|
case TWE_OP_WRITE:
|
|
cmd->generic.sgl_offset = 3;
|
|
twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
|
|
break;
|
|
case TWE_OP_ATA_PASSTHROUGH:
|
|
cmd->generic.sgl_offset = 5;
|
|
twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
|
|
break;
|
|
default:
|
|
/*
|
|
* Fall back to what the linux driver does.
|
|
* Do this because the API may send an opcode
|
|
* the driver knows nothing about and this will
|
|
* at least stop PCIABRT's from hosing us.
|
|
*/
|
|
switch (cmd->generic.sgl_offset) {
|
|
case 2:
|
|
twe_fillin_sgl(&cmd->param.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
|
|
break;
|
|
case 3:
|
|
twe_fillin_sgl(&cmd->io.sgl[0], segs, nsegments, TWE_MAX_SGL_LENGTH);
|
|
break;
|
|
case 5:
|
|
twe_fillin_sgl(&cmd->ata.sgl[0], segs, nsegments, TWE_MAX_ATA_SGL_LENGTH);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (tr->tr_flags & TWE_CMD_DATAIN) {
|
|
if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
|
|
bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
|
|
BUS_DMASYNC_PREREAD);
|
|
} else {
|
|
bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
|
|
BUS_DMASYNC_PREREAD);
|
|
}
|
|
}
|
|
|
|
if (tr->tr_flags & TWE_CMD_DATAOUT) {
|
|
/*
|
|
* if we're using an alignment buffer, and we're writing data
|
|
* copy the real data out
|
|
*/
|
|
if (tr->tr_flags & TWE_CMD_ALIGNBUF)
|
|
bcopy(tr->tr_realdata, tr->tr_data, tr->tr_length);
|
|
|
|
if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
|
|
bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
|
|
BUS_DMASYNC_PREWRITE);
|
|
} else {
|
|
bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
|
|
BUS_DMASYNC_PREWRITE);
|
|
}
|
|
}
|
|
|
|
if (twe_start(tr) == EBUSY)
|
|
twe_requeue_ready(tr);
|
|
}
|
|
|
|
static void
|
|
twe_setup_request_dmamap(void *arg, bus_dma_segment_t *segs, int nsegments, int error)
|
|
{
|
|
struct twe_softc *sc = (struct twe_softc *)arg;
|
|
|
|
debug_called(4);
|
|
|
|
/* command can't cross a page boundary */
|
|
sc->twe_cmdphys = segs[0].ds_addr;
|
|
}
|
|
|
|
int
|
|
twe_map_request(struct twe_request *tr)
|
|
{
|
|
struct twe_softc *sc = tr->tr_sc;
|
|
int error = 0;
|
|
|
|
debug_called(4);
|
|
|
|
if (sc->twe_state & TWE_STATE_FRZN)
|
|
return (EBUSY);
|
|
|
|
bus_dmamap_sync(sc->twe_cmd_dmat, sc->twe_cmdmap, BUS_DMASYNC_PREWRITE);
|
|
|
|
/*
|
|
* If the command involves data, map that too.
|
|
*/
|
|
if (tr->tr_data != NULL && ((tr->tr_flags & TWE_CMD_MAPPED) == 0)) {
|
|
|
|
/*
|
|
* Data must be 64-byte aligned; allocate a fixup buffer if it's not.
|
|
*/
|
|
if (((vm_offset_t)tr->tr_data % TWE_ALIGNMENT) != 0) {
|
|
tr->tr_realdata = tr->tr_data; /* save pointer to 'real' data */
|
|
tr->tr_flags |= TWE_CMD_ALIGNBUF;
|
|
tr->tr_data = malloc(tr->tr_length, TWE_MALLOC_CLASS, M_NOWAIT); /* XXX check result here */
|
|
}
|
|
|
|
/*
|
|
* Map the data buffer into bus space and build the s/g list.
|
|
*/
|
|
if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
|
|
bcopy(tr->tr_data, sc->twe_immediate, tr->tr_length);
|
|
bus_dmamap_load(sc->twe_immediate_dmat, sc->twe_immediate_map, sc->twe_immediate,
|
|
tr->tr_length, twe_setup_data_dmamap, tr, 0);
|
|
} else {
|
|
error = bus_dmamap_load(sc->twe_buffer_dmat, tr->tr_dmamap, tr->tr_data, tr->tr_length,
|
|
twe_setup_data_dmamap, tr, 0);
|
|
}
|
|
if (error == EINPROGRESS) {
|
|
sc->twe_state |= TWE_STATE_FRZN;
|
|
error = 0;
|
|
}
|
|
} else
|
|
error = twe_start(tr);
|
|
|
|
return(error);
|
|
}
|
|
|
|
void
|
|
twe_unmap_request(struct twe_request *tr)
|
|
{
|
|
struct twe_softc *sc = tr->tr_sc;
|
|
|
|
debug_called(4);
|
|
|
|
bus_dmamap_sync(sc->twe_cmd_dmat, sc->twe_cmdmap, BUS_DMASYNC_POSTWRITE);
|
|
|
|
/*
|
|
* If the command involved data, unmap that too.
|
|
*/
|
|
if (tr->tr_data != NULL) {
|
|
if (tr->tr_flags & TWE_CMD_DATAIN) {
|
|
if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
|
|
bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
|
|
BUS_DMASYNC_POSTREAD);
|
|
} else {
|
|
bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
|
|
BUS_DMASYNC_POSTREAD);
|
|
}
|
|
|
|
/* if we're using an alignment buffer, and we're reading data, copy the real data in */
|
|
if (tr->tr_flags & TWE_CMD_ALIGNBUF)
|
|
bcopy(tr->tr_data, tr->tr_realdata, tr->tr_length);
|
|
}
|
|
if (tr->tr_flags & TWE_CMD_DATAOUT) {
|
|
if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
|
|
bus_dmamap_sync(sc->twe_immediate_dmat, sc->twe_immediate_map,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
} else {
|
|
bus_dmamap_sync(sc->twe_buffer_dmat, tr->tr_dmamap,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
}
|
|
}
|
|
|
|
if (tr->tr_flags & TWE_CMD_IMMEDIATE) {
|
|
bcopy(sc->twe_immediate, tr->tr_data, tr->tr_length);
|
|
bus_dmamap_unload(sc->twe_immediate_dmat, sc->twe_immediate_map);
|
|
} else {
|
|
bus_dmamap_unload(sc->twe_buffer_dmat, tr->tr_dmamap);
|
|
}
|
|
}
|
|
|
|
/* free alignment buffer if it was used */
|
|
if (tr->tr_flags & TWE_CMD_ALIGNBUF) {
|
|
free(tr->tr_data, TWE_MALLOC_CLASS);
|
|
tr->tr_data = tr->tr_realdata; /* restore 'real' data pointer */
|
|
}
|
|
}
|
|
|
|
#ifdef TWE_DEBUG
|
|
/********************************************************************************
|
|
* Print current controller status, call from DDB.
|
|
*/
|
|
void
|
|
twe_report(void)
|
|
{
|
|
struct twe_softc *sc;
|
|
int i, s;
|
|
|
|
s = splbio();
|
|
for (i = 0; (sc = devclass_get_softc(twe_devclass, i)) != NULL; i++)
|
|
twe_print_controller(sc);
|
|
printf("twed: total bio count in %u out %u\n", twed_bio_in, twed_bio_out);
|
|
splx(s);
|
|
}
|
|
#endif
|