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freebsd/sys/mips/cavium/ciu.c
Juli Mallett cea2b8b915 Update the port of FreeBSD to Cavium Octeon to use the Cavium Simple Executive
library:
o) Increase inline unit / large function growth limits for MIPS to accommodate
   the needs of the Simple Executive, which uses a shocking amount of inlining.
o) Remove TARGET_OCTEON and use CPU_CNMIPS to do things required by cnMIPS and
   the Octeon SoC.
o) Add OCTEON_VENDOR_LANNER to use Lanner's allocation of vendor-specific
   board numbers, specifically to support the MR320.
o) Add OCTEON_BOARD_CAPK_0100ND to hard-wire configuration for the CAPK-0100nd,
   which improperly uses an evaluation board's board number and breaks board
   detection at runtime.  This board is sold by Portwell as the CAM-0100.
o) Add support for the RTC available on some Octeon boards.
o) Add support for the Octeon PCI bus.  Note that rman_[sg]et_virtual for IO
   ports can not work unless building for n64.
o) Clean up the CompactFlash driver to use Simple Executive macros and
   structures where possible (it would be advisable to use the Simple Executive
   API to set the PIO mode, too, but that is not done presently.)  Also use
   structures from FreeBSD's ATA layer rather than structures copied from
   Linux.
o) Print available Octeon SoC features on boot.
o) Add support for the Octeon timecounter.
o) Use the Simple Executive's routines rather than local copies for doing reads
   and writes to 64-bit addresses and use its macros for various device
   addresses rather than using local copies.
o) Rename octeon_board_real to octeon_is_simulation to reduce differences with
   Cavium-provided code originally written for Linux.  Also make it use the
   same simplified test that the Simple Executive and Linux both use rather
   than our complex one.
o) Add support for the Octeon CIU, which is the main interrupt unit, as a bus
   to use normal interrupt allocation and setup routines.
o) Use the Simple Executive's bootmem facility to allocate physical memory for
   the kernel, rather than assuming we know which addresses we can steal.
   NB: This may reduce the amount of RAM the kernel reports you as having if
       you are leaving large temporary allocations made by U-Boot allocated
       when starting FreeBSD.
o) Add a port of the Cavium-provided Ethernet driver for Linux.  This changes
   Ethernet interface naming from rgmxN to octeN.  The new driver has vast
   improvements over the old one, both in performance and functionality, but
   does still have some features which have not been ported entirely and there
   may be unimplemented code that can be hit in everyday use.  I will make
   every effort to correct those as they are reported.
o) Support loading the kernel on non-contiguous cores.
o) Add very conservative support for harvesting randomness from the Octeon
   random number device.
o) Turn SMP on by default.
o) Clean up the style of the Octeon kernel configurations a little and make
   them compile with -march=octeon.
o) Add support for the Lanner MR320 and the CAPK-0100nd to the Simple
   Executive.
o) Modify the Simple Executive to build on FreeBSD and to build without
   executive-config.h or cvmx-config.h.  In the future we may want to
   revert part of these changes and supply executive-config.h and
   cvmx-config.h and access to the options contained in those files via
   kernel configuration files.
o) Modify the Simple Executive USB routines to support getting and setting
   of the USB PID.
2010-07-20 19:25:11 +00:00

360 lines
9.3 KiB
C

/*-
* Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org>
* 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <contrib/octeon-sdk/cvmx.h>
#include <contrib/octeon-sdk/cvmx-interrupt.h>
/*
* This bus sits between devices/buses and nexus and handles CIU interrupts
* and passes everything else through. It should really be a nexus subclass
* or something, but for now this will be sufficient.
*/
#define CIU_IRQ_HARD (0)
#define CIU_IRQ_EN0_BEGIN CVMX_IRQ_WORKQ0
#define CIU_IRQ_EN0_END CVMX_IRQ_BOOTDMA
#define CIU_IRQ_EN0_COUNT ((CIU_IRQ_EN0_END - CIU_IRQ_EN0_BEGIN) + 1)
#define CIU_IRQ_EN1_BEGIN CVMX_IRQ_WDOG0
#define CIU_IRQ_EN1_END CVMX_IRQ_WDOG15
#define CIU_IRQ_EN1_COUNT ((CIU_IRQ_EN1_END - CIU_IRQ_EN1_BEGIN) + 1)
struct ciu_softc {
struct rman irq_rman;
struct resource *ciu_irq;
};
static mips_intrcnt_t ciu_en0_intrcnt[CIU_IRQ_EN0_COUNT];
static mips_intrcnt_t ciu_en1_intrcnt[CIU_IRQ_EN1_COUNT];
static struct intr_event *ciu_en0_intr_events[CIU_IRQ_EN0_COUNT];
static struct intr_event *ciu_en1_intr_events[CIU_IRQ_EN1_COUNT];
static int ciu_probe(device_t);
static int ciu_attach(device_t);
static struct resource *ciu_alloc_resource(device_t, device_t, int, int *,
u_long, u_long, u_long, u_int);
static int ciu_setup_intr(device_t, device_t, struct resource *,
int, driver_filter_t *, driver_intr_t *,
void *, void **);
static void ciu_hinted_child(device_t, const char *, int);
static void ciu_en0_intr_mask(void *);
static void ciu_en0_intr_unmask(void *);
static void ciu_en1_intr_mask(void *);
static void ciu_en1_intr_unmask(void *);
static int ciu_intr(void *);
static int
ciu_probe(device_t dev)
{
if (device_get_unit(dev) != 0)
return (ENXIO);
device_set_desc(dev, "Cavium Octeon Central Interrupt Unit");
return (0);
}
static int
ciu_attach(device_t dev)
{
char name[MAXCOMLEN + 1];
struct ciu_softc *sc;
unsigned i;
int error;
int rid;
sc = device_get_softc(dev);
rid = 0;
sc->ciu_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, CIU_IRQ_HARD,
CIU_IRQ_HARD, 1, RF_ACTIVE);
if (sc->ciu_irq == NULL) {
device_printf(dev, "could not allocate irq%d\n", CIU_IRQ_HARD);
return (ENXIO);
}
error = bus_setup_intr(dev, sc->ciu_irq, INTR_TYPE_MISC, ciu_intr,
NULL, sc, NULL);
if (error != 0) {
device_printf(dev, "bus_setup_intr failed: %d\n", error);
return (error);
}
sc->irq_rman.rm_type = RMAN_ARRAY;
sc->irq_rman.rm_descr = "CIU IRQ";
error = rman_init(&sc->irq_rman);
if (error != 0)
return (error);
/*
* We have two contiguous IRQ regions, use a single rman.
*/
error = rman_manage_region(&sc->irq_rman, CIU_IRQ_EN0_BEGIN,
CIU_IRQ_EN1_END);
if (error != 0)
return (error);
for (i = 0; i < CIU_IRQ_EN0_COUNT; i++) {
snprintf(name, sizeof name, "int%d:", i + CIU_IRQ_EN0_BEGIN);
ciu_en0_intrcnt[i] = mips_intrcnt_create(name);
}
for (i = 0; i < CIU_IRQ_EN1_COUNT; i++) {
snprintf(name, sizeof name, "int%d:", i + CIU_IRQ_EN1_BEGIN);
ciu_en1_intrcnt[i] = mips_intrcnt_create(name);
}
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static struct resource *
ciu_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 *res;
struct ciu_softc *sc;
sc = device_get_softc(bus);
switch (type) {
case SYS_RES_IRQ:
break;
default:
return (bus_alloc_resource(device_get_parent(bus), type, rid,
start, end, count, flags));
}
/*
* One interrupt at a time for now.
*/
if (start != end)
return (NULL);
res = rman_reserve_resource(&sc->irq_rman, start, end, count, flags,
child);
if (res != NULL)
return (res);
return (NULL);
}
static int
ciu_setup_intr(device_t bus, device_t child, struct resource *res, int flags,
driver_filter_t *filter, driver_intr_t *intr, void *arg,
void **cookiep)
{
struct intr_event *event, **eventp;
void (*mask_func)(void *);
void (*unmask_func)(void *);
mips_intrcnt_t intrcnt;
int error;
int irq;
irq = rman_get_start(res);
if (irq <= CIU_IRQ_EN0_END) {
eventp = &ciu_en0_intr_events[irq - CIU_IRQ_EN0_BEGIN];
intrcnt = ciu_en0_intrcnt[irq - CIU_IRQ_EN0_BEGIN];
mask_func = ciu_en0_intr_mask;
unmask_func = ciu_en0_intr_unmask;
} else {
eventp = &ciu_en1_intr_events[irq - CIU_IRQ_EN1_BEGIN];
intrcnt = ciu_en1_intrcnt[irq - CIU_IRQ_EN1_BEGIN];
mask_func = ciu_en1_intr_mask;
unmask_func = ciu_en1_intr_unmask;
}
if ((event = *eventp) == NULL) {
error = intr_event_create(eventp, (void *)(uintptr_t)irq, 0,
irq, mask_func, unmask_func, NULL, NULL, "int%d", irq);
if (error != 0)
return (error);
event = *eventp;
unmask_func((void *)(uintptr_t)irq);
}
intr_event_add_handler(event, device_get_nameunit(child),
filter, intr, arg, intr_priority(flags), flags, cookiep);
mips_intrcnt_setname(intrcnt, event->ie_fullname);
return (0);
}
static void
ciu_hinted_child(device_t bus, const char *dname, int dunit)
{
BUS_ADD_CHILD(bus, 0, dname, dunit);
}
static void
ciu_en0_intr_mask(void *arg)
{
uint64_t mask;
int irq;
irq = (uintptr_t)arg;
mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2));
mask &= ~(1ull << (irq - CIU_IRQ_EN0_BEGIN));
cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2), mask);
}
static void
ciu_en0_intr_unmask(void *arg)
{
uint64_t mask;
int irq;
irq = (uintptr_t)arg;
mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2));
mask |= 1ull << (irq - CIU_IRQ_EN0_BEGIN);
cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2), mask);
}
static void
ciu_en1_intr_mask(void *arg)
{
uint64_t mask;
int irq;
irq = (uintptr_t)arg;
mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2));
mask &= ~(1ull << (irq - CIU_IRQ_EN1_BEGIN));
cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2), mask);
}
static void
ciu_en1_intr_unmask(void *arg)
{
uint64_t mask;
int irq;
irq = (uintptr_t)arg;
mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2));
mask |= 1ull << (irq - CIU_IRQ_EN1_BEGIN);
cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2), mask);
}
static int
ciu_intr(void *arg)
{
struct ciu_softc *sc;
uint64_t en0_sum, en1_sum;
uint64_t en0_mask, en1_mask;
int irq_index;
int error;
sc = arg;
(void)sc;
en0_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(cvmx_get_core_num()*2));
en1_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1);
en0_mask = cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num()*2));
en1_mask = cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num()*2));
en0_sum &= en0_mask;
en1_sum &= en1_mask;
if (en0_sum == 0 && en1_sum == 0)
return (FILTER_STRAY);
irq_index = 0;
for (irq_index = 0; en0_sum != 0; irq_index++, en0_sum >>= 1) {
if ((en0_sum & 1) == 0)
continue;
mips_intrcnt_inc(ciu_en0_intrcnt[irq_index]);
error = intr_event_handle(ciu_en0_intr_events[irq_index], NULL);
if (error != 0)
printf("%s: stray en0 irq%d\n", __func__, irq_index);
}
irq_index = 0;
for (irq_index = 0; en1_sum != 0; irq_index++, en1_sum >>= 1) {
if ((en1_sum & 1) == 0)
continue;
mips_intrcnt_inc(ciu_en1_intrcnt[irq_index]);
error = intr_event_handle(ciu_en1_intr_events[irq_index], NULL);
if (error != 0)
printf("%s: stray en1 irq%d\n", __func__, irq_index);
}
return (FILTER_HANDLED);
}
static device_method_t ciu_methods[] = {
DEVMETHOD(device_probe, ciu_probe),
DEVMETHOD(device_attach, ciu_attach),
DEVMETHOD(bus_alloc_resource, ciu_alloc_resource),
DEVMETHOD(bus_activate_resource,bus_generic_activate_resource),
DEVMETHOD(bus_setup_intr, ciu_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_add_child, bus_generic_add_child),
DEVMETHOD(bus_hinted_child, ciu_hinted_child),
{ 0, 0 }
};
static driver_t ciu_driver = {
"ciu",
ciu_methods,
sizeof(struct ciu_softc),
};
static devclass_t ciu_devclass;
DRIVER_MODULE(ciu, nexus, ciu_driver, ciu_devclass, 0, 0);