| Current Path : /sys/dev/siba/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/siba/siba.c |
/*-
* Copyright (c) 2007 Bruce M. Simpson.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/siba/siba.c 229093 2011-12-31 14:12:12Z hselasky $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/siba/siba_ids.h>
#include <dev/siba/sibareg.h>
#include <dev/siba/sibavar.h>
/*
* TODO: De-mipsify this code.
* TODO: cpu clock calculation. -> move to siba_cc instance
* TODO: Hardwire IRQs for attached cores on siba at probe time.
* TODO: Support detach.
* TODO: Power management.
* TODO: code cleanup.
* TODO: Support deployments of siba other than as a system bus.
*/
#ifndef MIPS_MEM_RID
#define MIPS_MEM_RID 0x20
#endif
extern int rman_debug;
static struct rman mem_rman; /* XXX move to softc */
static int siba_debug = 1;
static const char descfmt[] = "Sonics SiliconBackplane rev %s";
#define SIBA_DEVDESCLEN sizeof(descfmt) + 8
/*
* Device identifiers and descriptions.
*/
static struct siba_devid siba_devids[] = {
{ SIBA_VID_BROADCOM, SIBA_DEVID_CHIPCOMMON, SIBA_REV_ANY,
"ChipCommon" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_SDRAM, SIBA_REV_ANY,
"SDRAM controller" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_PCI, SIBA_REV_ANY,
"PCI host interface" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_MIPS, SIBA_REV_ANY,
"MIPS core" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_ETHERNET, SIBA_REV_ANY,
"Ethernet core" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_USB11_HOSTDEV, SIBA_REV_ANY,
"USB host controller" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_IPSEC, SIBA_REV_ANY,
"IPSEC accelerator" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_SDRAMDDR, SIBA_REV_ANY,
"SDRAM/DDR controller" },
{ SIBA_VID_BROADCOM, SIBA_DEVID_MIPS_3302, SIBA_REV_ANY,
"MIPS 3302 core" },
{ 0, 0, 0, NULL }
};
static int siba_activate_resource(device_t, device_t, int, int,
struct resource *);
static device_t siba_add_child(device_t, u_int, const char *, int);
static struct resource *
siba_alloc_resource(device_t, device_t, int, int *, u_long,
u_long, u_long, u_int);
static int siba_attach(device_t);
#ifdef notyet
static void siba_destroy_devinfo(struct siba_devinfo *);
#endif
static struct siba_devid *
siba_dev_match(uint16_t, uint16_t, uint8_t);
static struct resource_list *
siba_get_reslist(device_t, device_t);
static uint8_t siba_getirq(uint16_t);
static int siba_print_all_resources(device_t dev);
static int siba_print_child(device_t, device_t);
static int siba_probe(device_t);
static void siba_probe_nomatch(device_t, device_t);
int siba_read_ivar(device_t, device_t, int, uintptr_t *);
static struct siba_devinfo *
siba_setup_devinfo(device_t, uint8_t);
int siba_write_ivar(device_t, device_t, int, uintptr_t);
uint8_t siba_getncores(device_t, uint16_t);
/*
* On the Sentry5, the system bus IRQs are the same as the
* MIPS IRQs. Particular cores are hardwired to certain IRQ lines.
*/
static uint8_t
siba_getirq(uint16_t devid)
{
uint8_t irq;
switch (devid) {
case SIBA_DEVID_CHIPCOMMON:
irq = 0;
break;
case SIBA_DEVID_ETHERNET:
irq = 1;
break;
case SIBA_DEVID_IPSEC:
irq = 2;
break;
case SIBA_DEVID_USB11_HOSTDEV:
irq = 3;
break;
case SIBA_DEVID_PCI:
irq = 4;
break;
#if 0
/*
* 5 is reserved for the MIPS on-chip timer interrupt;
* it is hard-wired by the tick driver.
*/
case SIBA_DEVID_MIPS:
case SIBA_DEVID_MIPS_3302:
irq = 5;
break;
#endif
default:
irq = 0xFF; /* this core does not need an irq */
break;
}
return (irq);
}
static int
siba_probe(device_t dev)
{
struct siba_softc *sc = device_get_softc(dev);
uint32_t idlo, idhi;
uint16_t ccid;
int rid;
sc->siba_dev = dev;
//rman_debug = 1; /* XXX */
/*
* Map the ChipCommon register set using the hints the kernel
* was compiled with.
*/
rid = MIPS_MEM_RID;
sc->siba_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->siba_mem_res == NULL) {
device_printf(dev, "unable to allocate probe aperture\n");
return (ENXIO);
}
sc->siba_mem_bt = rman_get_bustag(sc->siba_mem_res);
sc->siba_mem_bh = rman_get_bushandle(sc->siba_mem_res);
sc->siba_maddr = rman_get_start(sc->siba_mem_res);
sc->siba_msize = rman_get_size(sc->siba_mem_res);
if (siba_debug) {
device_printf(dev, "start %08x len %08x\n",
sc->siba_maddr, sc->siba_msize);
}
idlo = siba_mips_read_4(sc, 0, SIBA_IDLOW);
idhi = siba_mips_read_4(sc, 0, SIBA_IDHIGH);
ccid = ((idhi & 0x8ff0) >> 4);
if (siba_debug) {
device_printf(dev, "idlo = %08x\n", idlo);
device_printf(dev, "idhi = %08x\n", idhi);
device_printf(dev, " chipcore id = %08x\n", ccid);
}
/*
* For now, check that the first core is the ChipCommon core.
*/
if (ccid != SIBA_DEVID_CHIPCOMMON) {
if (siba_debug)
device_printf(dev, "first core is not ChipCommon\n");
return (ENXIO);
}
/*
* Determine backplane revision and set description string.
*/
uint32_t rev;
char *revp;
char descbuf[SIBA_DEVDESCLEN];
rev = idlo & 0xF0000000;
revp = "unknown";
if (rev == 0x00000000)
revp = "2.2";
else if (rev == 0x10000000)
revp = "2.3";
(void)snprintf(descbuf, sizeof(descbuf), descfmt, revp);
device_set_desc_copy(dev, descbuf);
/*
* Determine how many cores are present on this siba bus, so
* that we may map them all.
*/
uint32_t ccidreg;
uint16_t cc_id;
uint16_t cc_rev;
ccidreg = siba_mips_read_4(sc, 0, SIBA_CC_CHIPID);
cc_id = (ccidreg & SIBA_CC_IDMASK);
cc_rev = (ccidreg & SIBA_CC_REVMASK) >> SIBA_CC_REVSHIFT;
if (siba_debug) {
device_printf(dev, "ccid = %08x, cc_id = %04x, cc_rev = %04x\n",
ccidreg, cc_id, cc_rev);
}
sc->siba_ncores = siba_getncores(dev, cc_id);
if (siba_debug) {
device_printf(dev, "%d cores detected.\n", sc->siba_ncores);
}
/*
* Now we know how many cores are on this siba, release the
* mapping and allocate a new mapping spanning all cores on the bus.
*/
rid = MIPS_MEM_RID;
int result;
result = bus_release_resource(dev, SYS_RES_MEMORY, rid,
sc->siba_mem_res);
if (result != 0) {
device_printf(dev, "error %d releasing resource\n", result);
return (ENXIO);
}
uint32_t total;
total = sc->siba_ncores * SIBA_CORE_LEN;
/* XXX Don't allocate the entire window until we
* enumerate the bus. Once the bus has been enumerated,
* and instance variables/children instantiated + populated,
* release the resource so children may attach.
*/
sc->siba_mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
sc->siba_maddr, sc->siba_maddr + total - 1, total, RF_ACTIVE);
if (sc->siba_mem_res == NULL) {
device_printf(dev, "unable to allocate entire aperture\n");
return (ENXIO);
}
sc->siba_mem_bt = rman_get_bustag(sc->siba_mem_res);
sc->siba_mem_bh = rman_get_bushandle(sc->siba_mem_res);
sc->siba_maddr = rman_get_start(sc->siba_mem_res);
sc->siba_msize = rman_get_size(sc->siba_mem_res);
if (siba_debug) {
device_printf(dev, "after remapping: start %08x len %08x\n",
sc->siba_maddr, sc->siba_msize);
}
bus_set_resource(dev, SYS_RES_MEMORY, rid, sc->siba_maddr,
sc->siba_msize);
/*
* We need a manager for the space we claim on nexus to
* satisfy requests from children.
* We need to keep the source reservation we took because
* otherwise it may be claimed elsewhere.
* XXX move to softc
*/
mem_rman.rm_start = sc->siba_maddr;
mem_rman.rm_end = sc->siba_maddr + sc->siba_msize - 1;
mem_rman.rm_type = RMAN_ARRAY;
mem_rman.rm_descr = "SiBa I/O memory addresses";
if (rman_init(&mem_rman) != 0 ||
rman_manage_region(&mem_rman, mem_rman.rm_start,
mem_rman.rm_end) != 0) {
panic("%s: mem_rman", __func__);
}
return (0);
}
static int
siba_attach(device_t dev)
{
struct siba_softc *sc = device_get_softc(dev);
struct siba_devinfo *sdi;
device_t child;
int idx;
if (siba_debug)
printf("%s: entry\n", __func__);
bus_generic_probe(dev);
/*
* Now that all bus space is mapped and visible to the CPU,
* enumerate its children.
* NB: only one core may be mapped at any time if the siba bus
* is the child of a PCI or PCMCIA bus.
*/
for (idx = 0; idx < sc->siba_ncores; idx++) {
sdi = siba_setup_devinfo(dev, idx);
child = device_add_child(dev, NULL, -1);
if (child == NULL)
panic("%s: device_add_child() failed\n", __func__);
device_set_ivars(child, sdi);
}
return (bus_generic_attach(dev));
}
static struct siba_devid *
siba_dev_match(uint16_t vid, uint16_t devid, uint8_t rev)
{
size_t i, bound;
struct siba_devid *sd;
bound = sizeof(siba_devids) / sizeof(struct siba_devid);
sd = &siba_devids[0];
for (i = 0; i < bound; i++, sd++) {
if (((vid == SIBA_VID_ANY) || (vid == sd->sd_vendor)) &&
((devid == SIBA_DEVID_ANY) || (devid == sd->sd_device)) &&
((rev == SIBA_REV_ANY) || (rev == sd->sd_rev) ||
(sd->sd_rev == SIBA_REV_ANY)))
break;
}
if (i == bound)
sd = NULL;
return (sd);
}
static int
siba_print_child(device_t bus, device_t child)
{
int retval = 0;
retval += bus_print_child_header(bus, child);
retval += siba_print_all_resources(child);
if (device_get_flags(child))
retval += printf(" flags %#x", device_get_flags(child));
retval += printf(" on %s\n", device_get_nameunit(bus));
return (retval);
}
static struct resource *
siba_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct resource *rv;
struct resource_list *rl;
struct resource_list_entry *rle;
int isdefault, needactivate;
#if 0
if (siba_debug)
printf("%s: entry\n", __func__);
#endif
isdefault = (start == 0UL && end == ~0UL && count == 1);
needactivate = flags & RF_ACTIVE;
rl = BUS_GET_RESOURCE_LIST(bus, child);
rle = NULL;
if (isdefault) {
rle = resource_list_find(rl, type, *rid);
if (rle == NULL)
return (NULL);
if (rle->res != NULL)
panic("%s: resource entry is busy", __func__);
start = rle->start;
end = rle->end;
count = rle->count;
}
/*
* If the request is for a resource which we manage,
* attempt to satisfy the allocation ourselves.
*/
if (type == SYS_RES_MEMORY &&
start >= mem_rman.rm_start && end <= mem_rman.rm_end) {
rv = rman_reserve_resource(&mem_rman, start, end, count,
flags, child);
if (rv == 0) {
printf("%s: could not reserve resource\n", __func__);
return (0);
}
rman_set_rid(rv, *rid);
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
printf("%s: could not activate resource\n",
__func__);
rman_release_resource(rv);
return (0);
}
}
return (rv);
}
/*
* Pass the request to the parent, usually MIPS nexus.
*/
if (siba_debug)
printf("%s: proxying request to parent\n", __func__);
return (resource_list_alloc(rl, bus, child, type, rid,
start, end, count, flags));
}
/*
* The parent bus is responsible for resource activation; in the
* case of MIPS, this boils down to setting the virtual address and
* bus handle by mapping the physical address into KSEG1.
*/
static int
siba_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child, type,
rid, r));
}
static struct siba_devinfo *
siba_setup_devinfo(device_t dev, uint8_t idx)
{
struct siba_softc *sc = device_get_softc(dev);
struct siba_devinfo *sdi;
uint32_t idlo, idhi, rev;
uint16_t vendorid, devid;
bus_addr_t baseaddr;
sdi = malloc(sizeof(*sdi), M_DEVBUF, M_WAITOK | M_ZERO);
resource_list_init(&sdi->sdi_rl);
idlo = siba_mips_read_4(sc, idx, SIBA_IDLOW);
idhi = siba_mips_read_4(sc, idx, SIBA_IDHIGH);
vendorid = (idhi & SIBA_IDHIGH_VENDORMASK) >>
SIBA_IDHIGH_VENDOR_SHIFT;
devid = ((idhi & 0x8ff0) >> 4);
rev = (idhi & SIBA_IDHIGH_REVLO);
rev |= (idhi & SIBA_IDHIGH_REVHI) >> SIBA_IDHIGH_REVHI_SHIFT;
sdi->sdi_vid = vendorid;
sdi->sdi_devid = devid;
sdi->sdi_rev = rev;
sdi->sdi_idx = idx;
sdi->sdi_irq = siba_getirq(devid);
/*
* Determine memory window on bus and irq if one is needed.
*/
baseaddr = sc->siba_maddr + (idx * SIBA_CORE_LEN);
resource_list_add(&sdi->sdi_rl, SYS_RES_MEMORY,
MIPS_MEM_RID, /* XXX */
baseaddr, baseaddr + SIBA_CORE_LEN - 1, SIBA_CORE_LEN);
if (sdi->sdi_irq != 0xff) {
resource_list_add(&sdi->sdi_rl, SYS_RES_IRQ,
0, sdi->sdi_irq, sdi->sdi_irq, 1);
}
return (sdi);
}
#ifdef notyet
static void
siba_destroy_devinfo(struct siba_devinfo *sdi)
{
resource_list_free(&sdi->sdi_rl);
free(sdi, M_DEVBUF);
}
#endif
/* XXX is this needed? */
static device_t
siba_add_child(device_t dev, u_int order, const char *name, int unit)
{
#if 1
device_printf(dev, "%s: entry\n", __func__);
return (NULL);
#else
device_t child;
struct siba_devinfo *sdi;
child = device_add_child_ordered(dev, order, name, unit);
if (child == NULL)
return (NULL);
sdi = malloc(sizeof(struct siba_devinfo), M_DEVBUF, M_NOWAIT|M_ZERO);
if (sdi == NULL)
return (NULL);
device_set_ivars(child, sdi);
return (child);
#endif
}
int
siba_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct siba_devinfo *sdi;
sdi = device_get_ivars(child);
switch (which) {
case SIBA_IVAR_VENDOR:
*result = sdi->sdi_vid;
break;
case SIBA_IVAR_DEVICE:
*result = sdi->sdi_devid;
break;
case SIBA_IVAR_REVID:
*result = sdi->sdi_rev;
break;
case SIBA_IVAR_CORE_INDEX:
*result = sdi->sdi_idx;
break;
default:
return (ENOENT);
}
return (0);
}
int
siba_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
return (EINVAL);
}
static void
siba_probe_nomatch(device_t dev, device_t child)
{
/*
* Announce devices which weren't attached after we probed the bus.
*/
if (siba_debug) {
struct siba_devid *sd;
sd = siba_dev_match(siba_get_vendor(child),
siba_get_device(child), SIBA_REV_ANY);
if (sd != NULL && sd->sd_desc != NULL) {
device_printf(dev, "<%s> "
"at device %d (no driver attached)\n",
sd->sd_desc, siba_get_core_index(child));
} else {
device_printf(dev, "<0x%04x, 0x%04x> "
"at device %d (no driver attached)\n",
siba_get_vendor(child), siba_get_device(child),
siba_get_core_index(child));
}
}
}
static int
siba_print_all_resources(device_t dev)
{
struct siba_devinfo *sdi = device_get_ivars(dev);
struct resource_list *rl = &sdi->sdi_rl;
int retval = 0;
if (STAILQ_FIRST(rl))
retval += printf(" at");
retval += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
return (retval);
}
static struct resource_list *
siba_get_reslist(device_t dev, device_t child)
{
struct siba_devinfo *sdi = device_get_ivars(child);
return (&sdi->sdi_rl);
}
static device_method_t siba_methods[] = {
/* Device interface */
DEVMETHOD(device_attach, siba_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_probe, siba_probe),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
/* Bus interface */
DEVMETHOD(bus_activate_resource,siba_activate_resource),
DEVMETHOD(bus_add_child, siba_add_child),
DEVMETHOD(bus_alloc_resource, siba_alloc_resource),
DEVMETHOD(bus_get_resource_list,siba_get_reslist),
DEVMETHOD(bus_print_child, siba_print_child),
DEVMETHOD(bus_probe_nomatch, siba_probe_nomatch),
DEVMETHOD(bus_read_ivar, siba_read_ivar),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_write_ivar, siba_write_ivar),
DEVMETHOD_END
};
static driver_t siba_driver = {
"siba",
siba_methods,
sizeof(struct siba_softc),
};
static devclass_t siba_devclass;
DRIVER_MODULE(siba, nexus, siba_driver, siba_devclass, 0, 0);