freebsd-dev/sys/dev/amr/amr_pci.c

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/*-
* Copyright (c) 1999,2000 Michael Smith
* Copyright (c) 2000 BSDi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <dev/amr/amr_compat.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/disk.h>
#include <machine/bus_memio.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#include <dev/amr/amrio.h>
#include <dev/amr/amrreg.h>
#include <dev/amr/amrvar.h>
static int amr_pci_probe(device_t dev);
static int amr_pci_attach(device_t dev);
static int amr_pci_detach(device_t dev);
static int amr_pci_shutdown(device_t dev);
static int amr_pci_suspend(device_t dev);
static int amr_pci_resume(device_t dev);
static void amr_pci_intr(void *arg);
static void amr_pci_free(struct amr_softc *sc);
static void amr_sglist_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
static int amr_sglist_map(struct amr_softc *sc);
static void amr_setup_mbox_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error);
static int amr_setup_mbox(struct amr_softc *sc);
static device_method_t amr_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, amr_pci_probe),
DEVMETHOD(device_attach, amr_pci_attach),
DEVMETHOD(device_detach, amr_pci_detach),
DEVMETHOD(device_shutdown, amr_pci_shutdown),
DEVMETHOD(device_suspend, amr_pci_suspend),
DEVMETHOD(device_resume, amr_pci_resume),
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
{ 0, 0 }
};
static driver_t amr_pci_driver = {
"amr",
amr_methods,
sizeof(struct amr_softc)
};
2002-01-08 06:47:02 +00:00
static devclass_t amr_devclass;
DRIVER_MODULE(amr, pci, amr_pci_driver, amr_devclass, 0, 0);
static struct
{
int vendor;
int device;
int flag;
#define PROBE_SIGNATURE (1<<0)
} amr_device_ids[] = {
{0x101e, 0x9010, 0},
{0x101e, 0x9060, 0},
{0x8086, 0x1960, PROBE_SIGNATURE}, /* generic i960RD, check for signature */
{0x101e, 0x1960, 0},
{0, 0, 0}
};
static int
amr_pci_probe(device_t dev)
{
int i, sig;
debug_called(1);
for (i = 0; amr_device_ids[i].vendor != 0; i++) {
if ((pci_get_vendor(dev) == amr_device_ids[i].vendor) &&
(pci_get_device(dev) == amr_device_ids[i].device)) {
/* do we need to test for a signature? */
if (amr_device_ids[i].flag & PROBE_SIGNATURE) {
sig = pci_read_config(dev, AMR_CFG_SIG, 2);
if ((sig != AMR_SIGNATURE_1) && (sig != AMR_SIGNATURE_2))
continue;
}
device_set_desc(dev, "AMI MegaRAID");
return(-10); /* allow room to be overridden */
}
}
return(ENXIO);
}
static int
amr_pci_attach(device_t dev)
{
struct amr_softc *sc;
int rid, rtype, error;
u_int32_t command;
debug_called(1);
/*
* Initialise softc.
*/
sc = device_get_softc(dev);
bzero(sc, sizeof(*sc));
sc->amr_dev = dev;
/* assume failure is 'not configured' */
error = ENXIO;
/*
* Determine board type.
*/
command = pci_read_config(dev, PCIR_COMMAND, 1);
if (pci_get_device(dev) == 0x1960) {
/*
* Make sure we are going to be able to talk to this board.
*/
if ((command & PCIM_CMD_MEMEN) == 0) {
device_printf(dev, "memory window not available\n");
goto out;
}
sc->amr_type |= AMR_TYPE_QUARTZ;
} else {
/*
* Make sure we are going to be able to talk to this board.
*/
if ((command & PCIM_CMD_PORTEN) == 0) {
device_printf(dev, "I/O window not available\n");
goto out;
}
}
/* force the busmaster enable bit on */
if (!(command & PCIM_CMD_BUSMASTEREN)) {
device_printf(dev, "busmaster bit not set, enabling\n");
command |= PCIM_CMD_BUSMASTEREN;
pci_write_config(dev, PCIR_COMMAND, command, 2);
}
/*
* Allocate the PCI register window.
*/
rid = PCIR_MAPS;
rtype = AMR_IS_QUARTZ(sc) ? SYS_RES_MEMORY : SYS_RES_IOPORT;
sc->amr_reg = bus_alloc_resource(dev, rtype, &rid, 0, ~0, 1, RF_ACTIVE);
if (sc->amr_reg == NULL) {
device_printf(sc->amr_dev, "can't allocate register window\n");
goto out;
}
sc->amr_btag = rman_get_bustag(sc->amr_reg);
sc->amr_bhandle = rman_get_bushandle(sc->amr_reg);
/*
* Allocate and connect our interrupt.
*/
rid = 0;
sc->amr_irq = bus_alloc_resource(sc->amr_dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE);
if (sc->amr_irq == NULL) {
device_printf(sc->amr_dev, "can't allocate interrupt\n");
goto out;
}
if (bus_setup_intr(sc->amr_dev, sc->amr_irq, INTR_TYPE_BIO | INTR_ENTROPY, amr_pci_intr, sc, &sc->amr_intr)) {
device_printf(sc->amr_dev, "can't set up interrupt\n");
goto out;
}
debug(2, "interrupt attached");
/* assume failure is 'out of memory' */
error = ENOMEM;
/*
* Allocate the parent bus DMA tag appropriate for PCI.
*/
if (bus_dma_tag_create(NULL, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MAXBSIZE, AMR_NSEG, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
&sc->amr_parent_dmat)) {
device_printf(dev, "can't allocate parent DMA tag\n");
goto out;
}
/*
* Create DMA tag for mapping buffers into controller-addressable space.
*/
if (bus_dma_tag_create(sc->amr_parent_dmat, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MAXBSIZE, AMR_NSEG, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&sc->amr_buffer_dmat)) {
device_printf(sc->amr_dev, "can't allocate buffer DMA tag\n");
goto out;
}
debug(2, "dma tag done");
/*
* Allocate and set up mailbox in a bus-visible fashion.
*/
if ((error = amr_setup_mbox(sc)) != 0)
goto out;
debug(2, "mailbox setup");
/*
* Build the scatter/gather buffers.
*/
if (amr_sglist_map(sc))
goto out;
debug(2, "s/g list mapped");
/*
* Do bus-independant initialisation, bring controller online.
*/
error = amr_attach(sc);
out:
if (error)
amr_pci_free(sc);
return(error);
}
/********************************************************************************
* Disconnect from the controller completely, in preparation for unload.
*/
static int
amr_pci_detach(device_t dev)
{
struct amr_softc *sc = device_get_softc(dev);
int error;
debug_called(1);
if (sc->amr_state & AMR_STATE_OPEN)
return(EBUSY);
if ((error = amr_pci_shutdown(dev)))
return(error);
amr_pci_free(sc);
return(0);
}
/********************************************************************************
* Bring the controller down to a dormant state and detach all child devices.
*
* This function is called before detach, system shutdown, or before performing
* an operation which may add or delete system disks. (Call amr_startup to
* resume normal operation.)
*
* Note that we can assume that the bioq on the controller is empty, as we won't
* allow shutdown if any device is open.
*/
static int
amr_pci_shutdown(device_t dev)
{
struct amr_softc *sc = device_get_softc(dev);
debug_called(1);
/* mark ourselves as in-shutdown */
sc->amr_state |= AMR_STATE_SHUTDOWN;
/* flush controller */
device_printf(sc->amr_dev, "flushing cache...");
printf("%s\n", amr_flush(sc) ? "failed" : "done");
/* XXX disable interrupts? */
return(0);
}
/********************************************************************************
* Bring the controller to a quiescent state, ready for system suspend.
*/
static int
amr_pci_suspend(device_t dev)
{
struct amr_softc *sc = device_get_softc(dev);
debug_called(1);
sc->amr_state |= AMR_STATE_SUSPEND;
/* flush controller */
device_printf(sc->amr_dev, "flushing cache...");
printf("%s\n", amr_flush(sc) ? "failed" : "done");
/* XXX disable interrupts? */
return(0);
}
/********************************************************************************
* Bring the controller back to a state ready for operation.
*/
static int
amr_pci_resume(device_t dev)
{
struct amr_softc *sc = device_get_softc(dev);
debug_called(1);
sc->amr_state &= ~AMR_STATE_SUSPEND;
/* XXX enable interrupts? */
return(0);
}
/*******************************************************************************
* Take an interrupt, or be poked by other code to look for interrupt-worthy
* status.
*/
static void
amr_pci_intr(void *arg)
{
struct amr_softc *sc = (struct amr_softc *)arg;
debug_called(2);
/* collect finished commands, queue anything waiting */
amr_done(sc);
}
/********************************************************************************
* Free all of the resources associated with (sc)
*
* Should not be called if the controller is active.
*/
static void
amr_pci_free(struct amr_softc *sc)
{
u_int8_t *p;
debug_called(1);
amr_free(sc);
/* destroy data-transfer DMA tag */
if (sc->amr_buffer_dmat)
bus_dma_tag_destroy(sc->amr_buffer_dmat);
/* free and destroy DMA memory and tag for s/g lists */
if (sc->amr_sgtable)
bus_dmamem_free(sc->amr_sg_dmat, sc->amr_sgtable, sc->amr_sg_dmamap);
if (sc->amr_sg_dmat)
bus_dma_tag_destroy(sc->amr_sg_dmat);
/* free and destroy DMA memory and tag for mailbox */
if (sc->amr_mailbox) {
p = (u_int8_t *)(uintptr_t)(volatile void *)sc->amr_mailbox;
bus_dmamem_free(sc->amr_sg_dmat, p - 16, sc->amr_sg_dmamap);
}
if (sc->amr_sg_dmat)
bus_dma_tag_destroy(sc->amr_sg_dmat);
/* disconnect the interrupt handler */
if (sc->amr_intr)
bus_teardown_intr(sc->amr_dev, sc->amr_irq, sc->amr_intr);
if (sc->amr_irq != NULL)
bus_release_resource(sc->amr_dev, SYS_RES_IRQ, 0, sc->amr_irq);
/* destroy the parent DMA tag */
if (sc->amr_parent_dmat)
bus_dma_tag_destroy(sc->amr_parent_dmat);
/* release the register window mapping */
if (sc->amr_reg != NULL)
bus_release_resource(sc->amr_dev,
AMR_IS_QUARTZ(sc) ? SYS_RES_MEMORY : SYS_RES_IOPORT,
PCIR_MAPS, sc->amr_reg);
}
/********************************************************************************
* Allocate and map the scatter/gather table in bus space.
*/
static void
amr_sglist_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct amr_softc *sc = (struct amr_softc *)arg;
debug_called(1);
/* save base of s/g table's address in bus space */
sc->amr_sgbusaddr = segs->ds_addr;
}
static int
amr_sglist_map(struct amr_softc *sc)
{
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, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
segsize, 1, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&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, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sizeof(struct amr_mailbox) + 16, 1, /* maxsize, nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
&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);
}