freebsd-dev/sys/arm/mv/mv_localbus.c
Ian Lepore b8821f8415 When mapping device memory, use PTE_DEVICE rather than PTE_NOCACHE.
On armv4 these are defined as synonyms right now, but it's a bit ambiguous
what NOCACHE means (is buffering/write-combining also enabled or not?); this
is a first step towards replacing PTE_NOCACHE with a less ambiguous name.
2014-05-10 20:03:03 +00:00

494 lines
13 KiB
C

/*-
* Copyright (c) 2012 Semihalf.
* 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("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ktr.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <machine/devmap.h>
#include <machine/fdt.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include "dev/fdt/fdt_common.h"
#include "ofw_bus_if.h"
#include <arm/mv/mvwin.h>
#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
printf(fmt,##args); } while (0)
#else
#define debugf(fmt, args...)
#endif
#define MV_LOCALBUS_MAX_BANKS 8
#define MV_LOCALBUS_MAX_BANK_CELLS 4
static MALLOC_DEFINE(M_LOCALBUS, "localbus", "localbus devices information");
struct localbus_bank {
vm_offset_t va; /* VA of the bank */
vm_paddr_t pa; /* physical address of the bank */
vm_size_t size; /* bank size */
uint8_t mapped; /* device memory has mapping */
};
struct localbus_softc {
device_t sc_dev;
bus_space_handle_t sc_bsh;
bus_space_tag_t sc_bst;
int sc_rid;
struct localbus_bank *sc_banks;
};
struct localbus_devinfo {
struct ofw_bus_devinfo di_ofw;
struct resource_list di_res;
int di_bank;
};
struct localbus_va_entry {
int8_t bank;
vm_offset_t va;
vm_size_t size;
};
/*
* Prototypes.
*/
static int localbus_probe(device_t);
static int localbus_attach(device_t);
static int localbus_print_child(device_t, device_t);
static struct resource *localbus_alloc_resource(device_t, device_t, int,
int *, u_long, u_long, u_long, u_int);
static struct resource_list *localbus_get_resource_list(device_t, device_t);
static ofw_bus_get_devinfo_t localbus_get_devinfo;
/*
* Bus interface definition.
*/
static device_method_t localbus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, localbus_probe),
DEVMETHOD(device_attach, localbus_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, localbus_print_child),
DEVMETHOD(bus_alloc_resource, localbus_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_get_resource_list, localbus_get_resource_list),
/* OFW bus interface */
DEVMETHOD(ofw_bus_get_devinfo, localbus_get_devinfo),
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
{ 0, 0 }
};
static driver_t localbus_driver = {
"localbus",
localbus_methods,
sizeof(struct localbus_softc)
};
const struct localbus_va_entry localbus_virtmap[] = {
{ 0, MV_DEV_BOOT_BASE, MV_DEV_BOOT_SIZE },
{ 1, MV_DEV_CS0_BASE, MV_DEV_CS0_SIZE },
{ 2, MV_DEV_CS1_BASE, MV_DEV_CS1_SIZE },
{ 3, MV_DEV_CS2_BASE, MV_DEV_CS2_SIZE },
{ -1, 0, 0 }
};
static struct localbus_bank localbus_banks[MV_LOCALBUS_MAX_BANKS];
devclass_t localbus_devclass;
DRIVER_MODULE(localbus, ofwbus, localbus_driver, localbus_devclass, 0, 0);
static int
fdt_localbus_reg_decode(phandle_t node, struct localbus_softc *sc,
struct localbus_devinfo *di)
{
u_long start, end, count;
pcell_t *reg, *regptr;
pcell_t addr_cells, size_cells;
int tuple_size, tuples;
int i, rv, bank;
if (fdt_addrsize_cells(OF_parent(node), &addr_cells, &size_cells) != 0)
return (ENXIO);
tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
tuples = OF_getprop_alloc(node, "reg", tuple_size, (void **)&reg);
debugf("addr_cells = %d, size_cells = %d\n", addr_cells, size_cells);
debugf("tuples = %d, tuple size = %d\n", tuples, tuple_size);
if (tuples <= 0)
/* No 'reg' property in this node. */
return (0);
regptr = reg;
for (i = 0; i < tuples; i++) {
bank = fdt_data_get((void *)regptr, 1);
if (bank >= MV_LOCALBUS_MAX_BANKS) {
device_printf(sc->sc_dev, "bank number [%d] out of "
"range\n", bank);
continue;
}
/*
* If device doesn't have virtual to physical mapping don't add
* resources
*/
if (!(sc->sc_banks[bank].mapped)) {
device_printf(sc->sc_dev, "device [%d]: missing memory "
"mapping\n", bank);
continue;
}
di->di_bank = bank;
regptr += 1;
/* Get address/size. */
rv = fdt_data_to_res(regptr, addr_cells - 1, size_cells, &start,
&count);
if (rv != 0) {
resource_list_free(&di->di_res);
goto out;
}
/* Check if enough amount of memory is mapped */
if (sc->sc_banks[bank].size < count) {
device_printf(sc->sc_dev, "device [%d]: not enough "
"memory reserved\n", bank);
continue;
}
regptr += addr_cells - 1 + size_cells;
/* Calculate address range relative to VA base. */
start = sc->sc_banks[bank].va + start;
end = start + count - 1;
debugf("reg addr bank = %d, start = %lx, end = %lx, "
"count = %lx\n", bank, start, end, count);
/* Use bank (CS) cell as rid. */
resource_list_add(&di->di_res, SYS_RES_MEMORY, di->di_bank,
start, end, count);
}
rv = 0;
out:
free(reg, M_OFWPROP);
return (rv);
}
static int
localbus_probe(device_t dev)
{
if (!ofw_bus_is_compatible_strict(dev, "mrvl,lbc"))
return (ENXIO);
device_set_desc(dev, "Marvell device bus");
return (BUS_PROBE_DEFAULT);
}
static int
localbus_attach(device_t dev)
{
device_t dev_child;
struct localbus_softc *sc;
struct localbus_devinfo *di;
phandle_t dt_node, dt_child;
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_banks = localbus_banks;
/*
* Walk localbus and add direct subordinates as our children.
*/
dt_node = ofw_bus_get_node(dev);
for (dt_child = OF_child(dt_node); dt_child != 0;
dt_child = OF_peer(dt_child)) {
/* Check and process 'status' property. */
if (!(fdt_is_enabled(dt_child)))
continue;
if (!(fdt_pm_is_enabled(dt_child)))
continue;
di = malloc(sizeof(*di), M_LOCALBUS, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) {
free(di, M_LOCALBUS);
device_printf(dev, "could not set up devinfo\n");
continue;
}
resource_list_init(&di->di_res);
if (fdt_localbus_reg_decode(dt_child, sc, di)) {
device_printf(dev, "could not process 'reg' "
"property\n");
ofw_bus_gen_destroy_devinfo(&di->di_ofw);
free(di, M_LOCALBUS);
continue;
}
/* Add newbus device for this FDT node */
dev_child = device_add_child(dev, NULL, -1);
if (dev_child == NULL) {
device_printf(dev, "could not add child: %s\n",
di->di_ofw.obd_name);
resource_list_free(&di->di_res);
ofw_bus_gen_destroy_devinfo(&di->di_ofw);
free(di, M_LOCALBUS);
continue;
}
#ifdef DEBUG
device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name);
#endif
device_set_ivars(dev_child, di);
}
return (bus_generic_attach(dev));
}
static int
localbus_print_child(device_t dev, device_t child)
{
struct localbus_devinfo *di;
struct resource_list *rl;
int rv;
di = device_get_ivars(child);
rl = &di->di_res;
rv = 0;
rv += bus_print_child_header(dev, child);
rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
rv += bus_print_child_footer(dev, child);
return (rv);
}
static struct resource *
localbus_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 localbus_devinfo *di;
struct resource_list_entry *rle;
/*
* Request for the default allocation with a given rid: use resource
* list stored in the local device info.
*/
if ((start == 0UL) && (end == ~0UL)) {
if ((di = device_get_ivars(child)) == NULL)
return (NULL);
if (type == SYS_RES_IOPORT)
type = SYS_RES_MEMORY;
rid = &di->di_bank;
rle = resource_list_find(&di->di_res, type, *rid);
if (rle == NULL) {
device_printf(bus, "no default resources for "
"rid = %d, type = %d\n", *rid, type);
return (NULL);
}
start = rle->start;
end = rle->end;
count = rle->count;
}
return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
count, flags));
}
static struct resource_list *
localbus_get_resource_list(device_t bus, device_t child)
{
struct localbus_devinfo *di;
di = device_get_ivars(child);
return (&di->di_res);
}
static const struct ofw_bus_devinfo *
localbus_get_devinfo(device_t bus, device_t child)
{
struct localbus_devinfo *di;
di = device_get_ivars(child);
return (&di->di_ofw);
}
int
fdt_localbus_devmap(phandle_t dt_node, struct arm_devmap_entry *fdt_devmap,
int banks_max_num, int *banks_added)
{
pcell_t ranges[MV_LOCALBUS_MAX_BANKS * MV_LOCALBUS_MAX_BANK_CELLS];
pcell_t *rangesptr;
uint32_t tuple_size, bank;
vm_paddr_t offset;
vm_size_t size;
int dev_num, addr_cells, size_cells, par_addr_cells, va_index, i, j, k;
if ((fdt_addrsize_cells(dt_node, &addr_cells, &size_cells)) != 0)
return (EINVAL);
par_addr_cells = fdt_parent_addr_cells(dt_node);
if (par_addr_cells > 2) {
/*
* Localbus devmap initialization error: unsupported parent
* #addr-cells
*/
return (ERANGE);
}
tuple_size = (addr_cells + par_addr_cells + size_cells);
if (tuple_size > MV_LOCALBUS_MAX_BANK_CELLS)
return (ERANGE);
tuple_size *= sizeof(pcell_t);
dev_num = OF_getprop(dt_node, "ranges", ranges, sizeof(ranges));
if (dev_num <= 0)
return (EINVAL);
/* Calculate number of devices attached to bus */
dev_num = dev_num / tuple_size;
/*
* If number of ranges > max number of localbus devices,
* additional entries will not be processed
*/
dev_num = MIN(dev_num, banks_max_num);
rangesptr = &ranges[0];
j = 0;
/* Process data from FDT */
for (i = 0; i < dev_num; i++) {
/* First field is bank number */
bank = fdt_data_get((void *)rangesptr, 1);
rangesptr += 1;
if (bank > MV_LOCALBUS_MAX_BANKS) {
/* Bank out of range */
rangesptr += ((addr_cells - 1) + par_addr_cells +
size_cells);
continue;
}
/* Find virtmap entry for this bank */
va_index = -1;
for (k = 0; localbus_virtmap[k].bank >= 0; k++) {
if (localbus_virtmap[k].bank == bank) {
va_index = k;
break;
}
}
/* Check if virtmap entry was found */
if (va_index == -1) {
rangesptr += ((addr_cells - 1) + par_addr_cells +
size_cells);
continue;
}
/* Remaining child's address fields are unused */
rangesptr += (addr_cells - 1);
/* Parent address offset */
offset = fdt_data_get((void *)rangesptr, par_addr_cells);
rangesptr += par_addr_cells;
/* Last field is size */
size = fdt_data_get((void *)rangesptr, size_cells);
rangesptr += size_cells;
if (size > localbus_virtmap[va_index].size) {
/* Not enough space reserved in virtual memory map */
continue;
}
fdt_devmap[j].pd_va = localbus_virtmap[va_index].va;
fdt_devmap[j].pd_pa = offset;
fdt_devmap[j].pd_size = size;
fdt_devmap[j].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
fdt_devmap[j].pd_cache = PTE_DEVICE;
/* Copy data to structure used by localbus driver */
localbus_banks[bank].va = fdt_devmap[j].pd_va;
localbus_banks[bank].pa = fdt_devmap[j].pd_pa;
localbus_banks[bank].size = fdt_devmap[j].pd_size;
localbus_banks[bank].mapped = 1;
j++;
}
*banks_added = j;
return (0);
}