3bda708056
properly support bounce buffers and resource shortages. This allows the driver to work properly and reliably with more than 4GB of RAM. Of the three data paths that exist in the driver, (block, CAM, ioctl), the ioctl path has not been well tested with these changes due to difficulty with finding an application that uses it that actually works. Sponsored by: The FreeBSD Foundation and FreeBSD Systems, Inc.
616 lines
18 KiB
C
616 lines
18 KiB
C
/*-
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* Copyright (c) 1999,2000 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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/*
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* Copyright (c) 2002 Eric Moore
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* Copyright (c) 2002 LSI Logic 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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* 3. The party using or redistributing the source code and binary forms
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* agrees to the disclaimer below and the terms and conditions set forth
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* herein.
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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/kernel.h>
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#include <sys/module.h>
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#include <dev/amr/amr_compat.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <machine/bus_memio.h>
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#include <machine/bus_pio.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/amr/amrio.h>
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#include <dev/amr/amrreg.h>
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#include <dev/amr/amrvar.h>
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static int amr_pci_probe(device_t dev);
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static int amr_pci_attach(device_t dev);
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static int amr_pci_detach(device_t dev);
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static int amr_pci_shutdown(device_t dev);
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static int amr_pci_suspend(device_t dev);
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static int amr_pci_resume(device_t dev);
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static void amr_pci_intr(void *arg);
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static void amr_pci_free(struct amr_softc *sc);
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static void amr_sglist_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
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static int amr_sglist_map(struct amr_softc *sc);
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static void amr_setup_mbox_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
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static int amr_setup_mbox(struct amr_softc *sc);
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static device_method_t amr_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, amr_pci_probe),
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DEVMETHOD(device_attach, amr_pci_attach),
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DEVMETHOD(device_detach, amr_pci_detach),
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DEVMETHOD(device_shutdown, amr_pci_shutdown),
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DEVMETHOD(device_suspend, amr_pci_suspend),
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DEVMETHOD(device_resume, amr_pci_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 amr_pci_driver = {
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"amr",
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amr_methods,
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sizeof(struct amr_softc)
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};
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static devclass_t amr_devclass;
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DRIVER_MODULE(amr, pci, amr_pci_driver, amr_devclass, 0, 0);
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static struct
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{
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int vendor;
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int device;
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int flag;
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#define PROBE_SIGNATURE (1<<0)
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} amr_device_ids[] = {
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{0x101e, 0x9010, 0},
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{0x101e, 0x9060, 0},
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{0x8086, 0x1960, PROBE_SIGNATURE},/* generic i960RD, check for signature */
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{0x101e, 0x1960, 0},
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{0x1000, 0x1960, PROBE_SIGNATURE},
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{0x1000, 0x0407, 0},
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{0x1028, 0x000e, PROBE_SIGNATURE}, /* perc4/di i960 */
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{0x1028, 0x000f, 0}, /* perc4/di Verde*/
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{0x1028, 0x0013, 0}, /* perc4/di */
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{0, 0, 0}
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};
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static int
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amr_pci_probe(device_t dev)
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{
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int i, sig;
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debug_called(1);
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for (i = 0; amr_device_ids[i].vendor != 0; i++) {
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if ((pci_get_vendor(dev) == amr_device_ids[i].vendor) &&
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(pci_get_device(dev) == amr_device_ids[i].device)) {
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/* do we need to test for a signature? */
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if (amr_device_ids[i].flag & PROBE_SIGNATURE) {
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sig = pci_read_config(dev, AMR_CFG_SIG, 2);
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if ((sig != AMR_SIGNATURE_1) && (sig != AMR_SIGNATURE_2))
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continue;
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}
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device_set_desc(dev, "LSILogic MegaRAID");
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return(-10); /* allow room to be overridden */
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}
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}
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return(ENXIO);
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}
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static int
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amr_pci_attach(device_t dev)
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{
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struct amr_softc *sc;
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int rid, rtype, error;
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u_int32_t command;
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debug_called(1);
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/*
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* Initialise softc.
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*/
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sc = device_get_softc(dev);
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bzero(sc, sizeof(*sc));
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sc->amr_dev = dev;
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/* assume failure is 'not configured' */
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error = ENXIO;
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/*
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* Determine board type.
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*/
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command = pci_read_config(dev, PCIR_COMMAND, 1);
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if ((pci_get_device(dev) == 0x1960) || (pci_get_device(dev) == 0x0407) ||
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(pci_get_device(dev) == 0x000e) || (pci_get_device(dev) == 0x000f) ||
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(pci_get_device(dev) == 0x0013)) {
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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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if ((command & PCIM_CMD_MEMEN) == 0) {
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device_printf(dev, "memory window not available\n");
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goto out;
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}
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sc->amr_type |= AMR_TYPE_QUARTZ;
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} else {
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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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if ((command & PCIM_CMD_PORTEN) == 0) {
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device_printf(dev, "I/O window not available\n");
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goto out;
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}
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}
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/* force the busmaster enable bit on */
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if (!(command & PCIM_CMD_BUSMASTEREN)) {
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device_printf(dev, "busmaster bit not set, enabling\n");
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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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/*
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* Allocate the PCI register window.
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*/
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rid = PCIR_BAR(0);
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rtype = AMR_IS_QUARTZ(sc) ? SYS_RES_MEMORY : SYS_RES_IOPORT;
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sc->amr_reg = bus_alloc_resource_any(dev, rtype, &rid, RF_ACTIVE);
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if (sc->amr_reg == NULL) {
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device_printf(sc->amr_dev, "can't allocate register window\n");
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goto out;
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}
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sc->amr_btag = rman_get_bustag(sc->amr_reg);
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sc->amr_bhandle = rman_get_bushandle(sc->amr_reg);
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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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sc->amr_irq = bus_alloc_resource_any(sc->amr_dev, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE);
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if (sc->amr_irq == NULL) {
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device_printf(sc->amr_dev, "can't allocate interrupt\n");
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goto out;
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}
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if (bus_setup_intr(sc->amr_dev, sc->amr_irq, INTR_TYPE_BIO | INTR_ENTROPY, amr_pci_intr, sc, &sc->amr_intr)) {
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device_printf(sc->amr_dev, "can't set up interrupt\n");
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goto out;
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}
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debug(2, "interrupt attached");
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/* assume failure is 'out of memory' */
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error = ENOMEM;
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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, AMR_NSEG, /* maxsize, nsegments */
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BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
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0, /* flags */
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NULL, NULL, /* lockfunc, lockarg */
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&sc->amr_parent_dmat)) {
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device_printf(dev, "can't allocate parent DMA tag\n");
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goto out;
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}
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/*
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* Create DMA tag for mapping buffers into controller-addressable space.
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*/
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if (bus_dma_tag_create(sc->amr_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, AMR_NSEG, /* maxsize, nsegments */
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MAXBSIZE, /* maxsegsize */
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BUS_DMA_ALLOCNOW, /* flags */
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busdma_lock_mutex, &Giant, /* lockfunc, lockarg */
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&sc->amr_buffer_dmat)) {
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device_printf(sc->amr_dev, "can't allocate buffer DMA tag\n");
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goto out;
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}
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debug(2, "dma tag done");
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/*
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* Allocate and set up mailbox in a bus-visible fashion.
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*/
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if ((error = amr_setup_mbox(sc)) != 0)
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goto out;
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debug(2, "mailbox setup");
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/*
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* Build the scatter/gather buffers.
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*/
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if (amr_sglist_map(sc))
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goto out;
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debug(2, "s/g list mapped");
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/*
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* Do bus-independant initialisation, bring controller online.
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*/
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error = amr_attach(sc);
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out:
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if (error)
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amr_pci_free(sc);
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return(error);
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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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amr_pci_detach(device_t dev)
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{
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struct amr_softc *sc = device_get_softc(dev);
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int error;
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debug_called(1);
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if (sc->amr_state & AMR_STATE_OPEN)
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return(EBUSY);
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if ((error = amr_pci_shutdown(dev)))
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return(error);
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amr_pci_free(sc);
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return(0);
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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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* This function is called before detach, system shutdown, or before performing
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* an operation which may add or delete system disks. (Call amr_startup to
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* resume normal operation.)
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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 int
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amr_pci_shutdown(device_t dev)
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{
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struct amr_softc *sc = device_get_softc(dev);
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int i,error,s;
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debug_called(1);
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/* mark ourselves as in-shutdown */
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sc->amr_state |= AMR_STATE_SHUTDOWN;
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/* flush controller */
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device_printf(sc->amr_dev, "flushing cache...");
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printf("%s\n", amr_flush(sc) ? "failed" : "done");
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s = splbio();
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error = 0;
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/* delete all our child devices */
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for(i = 0 ; i < AMR_MAXLD; i++) {
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if( sc->amr_drive[i].al_disk != 0) {
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if((error = device_delete_child(sc->amr_dev,sc->amr_drive[i].al_disk)) != 0)
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goto shutdown_out;
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sc->amr_drive[i].al_disk = 0;
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}
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}
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/* XXX disable interrupts? */
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shutdown_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 to a quiescent state, ready for system suspend.
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*/
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static int
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amr_pci_suspend(device_t dev)
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{
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struct amr_softc *sc = device_get_softc(dev);
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debug_called(1);
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sc->amr_state |= AMR_STATE_SUSPEND;
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/* flush controller */
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device_printf(sc->amr_dev, "flushing cache...");
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printf("%s\n", amr_flush(sc) ? "failed" : "done");
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/* XXX disable interrupts? */
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return(0);
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}
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/********************************************************************************
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* Bring the controller back to a state ready for operation.
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*/
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static int
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amr_pci_resume(device_t dev)
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{
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struct amr_softc *sc = device_get_softc(dev);
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debug_called(1);
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sc->amr_state &= ~AMR_STATE_SUSPEND;
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/* XXX enable interrupts? */
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return(0);
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}
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/*******************************************************************************
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* Take an interrupt, or be poked by other code to look for interrupt-worthy
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* status.
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*/
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static void
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amr_pci_intr(void *arg)
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{
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struct amr_softc *sc = (struct amr_softc *)arg;
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debug_called(2);
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/* collect finished commands, queue anything waiting */
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amr_done(sc);
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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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amr_pci_free(struct amr_softc *sc)
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{
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u_int8_t *p;
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debug_called(1);
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amr_free(sc);
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/* destroy data-transfer DMA tag */
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if (sc->amr_buffer_dmat)
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bus_dma_tag_destroy(sc->amr_buffer_dmat);
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/* free and destroy DMA memory and tag for s/g lists */
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if (sc->amr_sgtable)
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bus_dmamem_free(sc->amr_sg_dmat, sc->amr_sgtable, sc->amr_sg_dmamap);
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if (sc->amr_sg_dmat)
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bus_dma_tag_destroy(sc->amr_sg_dmat);
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/* free and destroy DMA memory and tag for mailbox */
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if (sc->amr_mailbox) {
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p = (u_int8_t *)(uintptr_t)(volatile void *)sc->amr_mailbox;
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bus_dmamem_free(sc->amr_mailbox_dmat, p - 16, sc->amr_mailbox_dmamap);
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}
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if (sc->amr_mailbox_dmat)
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bus_dma_tag_destroy(sc->amr_mailbox_dmat);
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/* disconnect the interrupt handler */
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if (sc->amr_intr)
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bus_teardown_intr(sc->amr_dev, sc->amr_irq, sc->amr_intr);
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if (sc->amr_irq != NULL)
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bus_release_resource(sc->amr_dev, SYS_RES_IRQ, 0, sc->amr_irq);
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/* destroy the parent DMA tag */
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if (sc->amr_parent_dmat)
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bus_dma_tag_destroy(sc->amr_parent_dmat);
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/* release the register window mapping */
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if (sc->amr_reg != NULL)
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bus_release_resource(sc->amr_dev,
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AMR_IS_QUARTZ(sc) ? SYS_RES_MEMORY : SYS_RES_IOPORT,
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PCIR_BAR(0), sc->amr_reg);
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}
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/********************************************************************************
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* Allocate and map the scatter/gather table in bus space.
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*/
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static void
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amr_sglist_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
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{
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struct amr_softc *sc = (struct amr_softc *)arg;
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debug_called(1);
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/* save base of s/g table's address in bus space */
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sc->amr_sgbusaddr = segs->ds_addr;
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}
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static int
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amr_sglist_map(struct amr_softc *sc)
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|
{
|
|
size_t segsize;
|
|
int error;
|
|
|
|
debug_called(1);
|
|
|
|
/*
|
|
* Create a single tag describing a region large enough to hold all of
|
|
* the s/g lists we will need.
|
|
*
|
|
* Note that we could probably use AMR_LIMITCMD here, but that may become tunable.
|
|
*/
|
|
segsize = sizeof(struct amr_sgentry) * AMR_NSEG * AMR_MAXCMD;
|
|
error = bus_dma_tag_create(sc->amr_parent_dmat, /* parent */
|
|
1, 0, /* alignment, boundary */
|
|
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
|
|
BUS_SPACE_MAXADDR, /* highaddr */
|
|
NULL, NULL, /* filter, filterarg */
|
|
segsize, 1, /* maxsize, nsegments */
|
|
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
|
|
0, /* flags */
|
|
busdma_lock_mutex, /* lockfunc */
|
|
&Giant, /* lockarg */
|
|
&sc->amr_sg_dmat);
|
|
if (error != 0) {
|
|
device_printf(sc->amr_dev, "can't allocate scatter/gather DMA tag\n");
|
|
return(ENOMEM);
|
|
}
|
|
|
|
/*
|
|
* Allocate enough s/g maps for all commands and permanently map them into
|
|
* controller-visible space.
|
|
*
|
|
* XXX this assumes we can get enough space for all the s/g maps in one
|
|
* contiguous slab. We may need to switch to a more complex arrangement where
|
|
* we allocate in smaller chunks and keep a lookup table from slot to bus address.
|
|
*
|
|
* XXX HACK ALERT: at least some controllers don't like the s/g memory being
|
|
* allocated below 0x2000. We leak some memory if we get some
|
|
* below this mark and allocate again. We should be able to
|
|
* avoid this with the tag setup, but that does't seem to work.
|
|
*/
|
|
retry:
|
|
error = bus_dmamem_alloc(sc->amr_sg_dmat, (void **)&sc->amr_sgtable, BUS_DMA_NOWAIT, &sc->amr_sg_dmamap);
|
|
if (error) {
|
|
device_printf(sc->amr_dev, "can't allocate s/g table\n");
|
|
return(ENOMEM);
|
|
}
|
|
bus_dmamap_load(sc->amr_sg_dmat, sc->amr_sg_dmamap, sc->amr_sgtable, segsize, amr_sglist_map_helper, sc, 0);
|
|
if (sc->amr_sgbusaddr < 0x2000) {
|
|
debug(1, "s/g table too low (0x%x), reallocating\n", sc->amr_sgbusaddr);
|
|
goto retry;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/********************************************************************************
|
|
* Allocate and set up mailbox areas for the controller (sc)
|
|
*
|
|
* The basic mailbox structure should be 16-byte aligned. This means that the
|
|
* mailbox64 structure has 4 bytes hanging off the bottom.
|
|
*/
|
|
static void
|
|
amr_setup_mbox_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
|
|
{
|
|
struct amr_softc *sc = (struct amr_softc *)arg;
|
|
|
|
debug_called(1);
|
|
|
|
/* save phsyical base of the basic mailbox structure */
|
|
sc->amr_mailboxphys = segs->ds_addr + 16;
|
|
}
|
|
|
|
static int
|
|
amr_setup_mbox(struct amr_softc *sc)
|
|
{
|
|
int error;
|
|
u_int8_t *p;
|
|
|
|
debug_called(1);
|
|
|
|
/*
|
|
* Create a single tag describing a region large enough to hold the entire
|
|
* mailbox.
|
|
*/
|
|
error = bus_dma_tag_create(sc->amr_parent_dmat, /* parent */
|
|
16, 0, /* alignment, boundary */
|
|
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
|
|
BUS_SPACE_MAXADDR, /* highaddr */
|
|
NULL, NULL, /* filter, filterarg */
|
|
sizeof(struct amr_mailbox) + 16, 1, /* maxsize, nsegments */
|
|
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
|
|
0, /* flags */
|
|
busdma_lock_mutex, /* lockfunc */
|
|
&Giant, /* lockarg */
|
|
&sc->amr_mailbox_dmat);
|
|
if (error != 0) {
|
|
device_printf(sc->amr_dev, "can't allocate mailbox tag\n");
|
|
return(ENOMEM);
|
|
}
|
|
|
|
/*
|
|
* Allocate the mailbox structure and permanently map it into
|
|
* controller-visible space.
|
|
*/
|
|
error = bus_dmamem_alloc(sc->amr_mailbox_dmat, (void **)&p, BUS_DMA_NOWAIT,
|
|
&sc->amr_mailbox_dmamap);
|
|
if (error) {
|
|
device_printf(sc->amr_dev, "can't allocate mailbox memory\n");
|
|
return(ENOMEM);
|
|
}
|
|
bus_dmamap_load(sc->amr_mailbox_dmat, sc->amr_mailbox_dmamap, p,
|
|
sizeof(struct amr_mailbox64), amr_setup_mbox_helper, sc, 0);
|
|
/*
|
|
* Conventional mailbox is inside the mailbox64 region.
|
|
*/
|
|
bzero(p, sizeof(struct amr_mailbox64));
|
|
sc->amr_mailbox64 = (struct amr_mailbox64 *)(p + 12);
|
|
sc->amr_mailbox = (struct amr_mailbox *)(p + 16);
|
|
|
|
return(0);
|
|
}
|