ed34d0ade2
I could find. I have no doubt missed a couple. Interrupt entropy harvesting is still conditional on the kern.random.sys.harvest_interrupt sysctl.
558 lines
16 KiB
C
558 lines
16 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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* $FreeBSD$
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*/
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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 <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 <sys/devicestat.h>
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#include <sys/disk.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 <pci/pcireg.h>
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#include <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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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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{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, "AMI 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) {
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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_MAPS;
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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(dev, rtype, &rid, 0, ~0, 1, 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(sc->amr_dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 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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BUS_DMA_ALLOCNOW, /* flags */
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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, /* 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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&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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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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/* XXX disable interrupts? */
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return(0);
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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_sg_dmat, p - 16, sc->amr_sg_dmamap);
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}
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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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/* 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_MAPS, 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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{
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size_t segsize;
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int error;
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debug_called(1);
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/*
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* Create a single tag describing a region large enough to hold all of
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* the s/g lists we will need.
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*
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* Note that we could probably use AMR_LIMITCMD here, but that may become tunable.
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*/
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segsize = sizeof(struct amr_sgentry) * AMR_NSEG * AMR_MAXCMD;
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error = bus_dma_tag_create(sc->amr_parent_dmat, /* parent */
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1, 0, /* alignment, boundary */
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BUS_SPACE_MAXADDR, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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segsize, 1, /* maxsize, nsegments */
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BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
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0, /* flags */
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&sc->amr_sg_dmat);
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if (error != 0) {
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device_printf(sc->amr_dev, "can't allocate scatter/gather DMA tag\n");
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return(ENOMEM);
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}
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/*
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* Allocate enough s/g maps for all commands and permanently map them into
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* controller-visible space.
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*
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* XXX this assumes we can get enough space for all the s/g maps in one
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* contiguous slab. We may need to switch to a more complex arrangement where
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* we allocate in smaller chunks and keep a lookup table from slot to bus address.
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*
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* XXX HACK ALERT: at least some controllers don't like the s/g memory being
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* allocated below 0x2000. We leak some memory if we get some
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* below this mark and allocate again. We should be able to
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* avoid this with the tag setup, but that does't seem to work.
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*/
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retry:
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error = bus_dmamem_alloc(sc->amr_sg_dmat, (void **)&sc->amr_sgtable, BUS_DMA_NOWAIT, &sc->amr_sg_dmamap);
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if (error) {
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device_printf(sc->amr_dev, "can't allocate s/g table\n");
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return(ENOMEM);
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}
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bus_dmamap_load(sc->amr_sg_dmat, sc->amr_sg_dmamap, sc->amr_sgtable, segsize, amr_sglist_map_helper, sc, 0);
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if (sc->amr_sgbusaddr < 0x2000) {
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debug(1, "s/g table too low (0x%x), reallocating\n", sc->amr_sgbusaddr);
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goto retry;
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}
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return(0);
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}
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/********************************************************************************
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* Allocate and set up mailbox areas for the controller (sc)
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*
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* The basic mailbox structure should be 16-byte aligned. This means that the
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* mailbox64 structure has 4 bytes hanging off the bottom.
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*/
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static void
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amr_setup_mbox_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 phsyical base of the basic mailbox structure */
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sc->amr_mailboxphys = segs->ds_addr + 16;
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}
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static int
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amr_setup_mbox(struct amr_softc *sc)
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{
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int error;
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u_int8_t *p;
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debug_called(1);
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/*
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* Create a single tag describing a region large enough to hold the entire
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* mailbox.
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*/
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error = bus_dma_tag_create(sc->amr_parent_dmat, /* parent */
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16, 0, /* alignment, boundary */
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BUS_SPACE_MAXADDR, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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sizeof(struct amr_mailbox) + 16, 1, /* maxsize, nsegments */
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BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
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0, /* flags */
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&sc->amr_mailbox_dmat);
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if (error != 0) {
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device_printf(sc->amr_dev, "can't allocate mailbox tag\n");
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return(ENOMEM);
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}
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/*
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* Allocate the mailbox structure and permanently map it into
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* controller-visible space.
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*/
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error = bus_dmamem_alloc(sc->amr_mailbox_dmat, (void **)&p, BUS_DMA_NOWAIT,
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&sc->amr_mailbox_dmamap);
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if (error) {
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device_printf(sc->amr_dev, "can't allocate mailbox memory\n");
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return(ENOMEM);
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}
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bus_dmamap_load(sc->amr_mailbox_dmat, sc->amr_mailbox_dmamap, p,
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sizeof(struct amr_mailbox64), amr_setup_mbox_helper, sc, 0);
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/*
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* Conventional mailbox is inside the mailbox64 region.
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*/
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bzero(p, sizeof(struct amr_mailbox64));
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sc->amr_mailbox64 = (struct amr_mailbox64 *)(p + 12);
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sc->amr_mailbox = (struct amr_mailbox *)(p + 16);
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return(0);
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}
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