freebsd-dev/sys/arm64/intel/stratix10-svc.c

270 lines
5.9 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Ruslan Bukin <br@bsdpad.com>
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory (Department of Computer Science and
* Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
* DARPA SSITH research programme.
*
* 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.
*/
/*
* Intel Stratix 10 Service Layer
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <sys/timeet.h>
#include <sys/timetc.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/vmem.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/fdt/simplebus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <arm64/intel/intel-smc.h>
#include <arm64/intel/stratix10-svc.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
struct s10_svc_softc {
device_t dev;
vmem_t *vmem;
intel_smc_callfn_t callfn;
};
static int
s10_data_claim(struct s10_svc_softc *sc)
{
struct arm_smccc_res res;
register_t a0, a1, a2;
int ret;
ret = 0;
while (1) {
a0 = INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE;
a1 = 0;
a2 = 0;
ret = sc->callfn(a0, a1, a2, 0, 0, 0, 0, 0, &res);
if (ret == INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY)
continue;
break;
}
return (ret);
}
int
s10_svc_send(device_t dev, struct s10_svc_msg *msg)
{
struct s10_svc_softc *sc;
struct arm_smccc_res res;
register_t a0, a1, a2;
int ret;
sc = device_get_softc(dev);
a0 = 0;
a1 = 0;
a2 = 0;
switch (msg->command) {
case COMMAND_RECONFIG:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_START;
a1 = msg->flags;
break;
case COMMAND_RECONFIG_DATA_SUBMIT:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_WRITE;
a1 = (uint64_t)msg->payload;
a2 = (uint64_t)msg->payload_length;
break;
case COMMAND_RECONFIG_DATA_CLAIM:
ret = s10_data_claim(sc);
return (ret);
default:
return (-1);
}
ret = sc->callfn(a0, a1, a2, 0, 0, 0, 0, 0, &res);
return (ret);
}
int
s10_svc_allocate_memory(device_t dev, struct s10_svc_mem *mem, int size)
{
struct s10_svc_softc *sc;
sc = device_get_softc(dev);
if (size <= 0)
return (EINVAL);
if (vmem_alloc(sc->vmem, size,
M_FIRSTFIT | M_NOWAIT, &mem->paddr)) {
device_printf(dev, "Can't allocate memory\n");
return (ENOMEM);
}
mem->size = size;
mem->fill = 0;
mem->vaddr = (vm_offset_t)pmap_mapdev(mem->paddr, mem->size);
return (0);
}
void
s10_svc_free_memory(device_t dev, struct s10_svc_mem *mem)
{
struct s10_svc_softc *sc;
sc = device_get_softc(dev);
vmem_free(sc->vmem, mem->paddr, mem->size);
}
static int
s10_get_memory(struct s10_svc_softc *sc)
{
struct arm_smccc_res res;
vmem_addr_t addr;
vmem_size_t size;
vmem_t *vmem;
sc->callfn(INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM,
0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 != INTEL_SIP_SMC_STATUS_OK)
return (ENXIO);
vmem = vmem_create("stratix10 vmem", 0, 0, PAGE_SIZE,
PAGE_SIZE, M_BESTFIT | M_WAITOK);
if (vmem == NULL)
return (ENXIO);
addr = res.a1;
size = res.a2;
device_printf(sc->dev, "Shared memory address 0x%lx size 0x%lx\n",
addr, size);
vmem_add(vmem, addr, size, 0);
sc->vmem = vmem;
return (0);
}
static intel_smc_callfn_t
s10_svc_get_callfn(struct s10_svc_softc *sc, phandle_t node)
{
char method[16];
if ((OF_getprop(node, "method", method, sizeof(method))) > 0) {
if (strcmp(method, "hvc") == 0)
return (arm_smccc_hvc);
else if (strcmp(method, "smc") == 0)
return (arm_smccc_smc);
else
device_printf(sc->dev,
"Invalid method \"%s\"\n", method);
} else
device_printf(sc->dev, "SMC method not provided\n");
return (NULL);
}
static int
s10_svc_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "intel,stratix10-svc"))
return (ENXIO);
device_set_desc(dev, "Stratix 10 SVC");
return (BUS_PROBE_DEFAULT);
}
static int
s10_svc_attach(device_t dev)
{
struct s10_svc_softc *sc;
phandle_t node;
node = ofw_bus_get_node(dev);
sc = device_get_softc(dev);
sc->dev = dev;
if (device_get_unit(dev) != 0)
return (ENXIO);
sc->callfn = s10_svc_get_callfn(sc, node);
if (sc->callfn == NULL)
return (ENXIO);
if (s10_get_memory(sc) != 0)
return (ENXIO);
return (0);
}
static device_method_t s10_svc_methods[] = {
DEVMETHOD(device_probe, s10_svc_probe),
DEVMETHOD(device_attach, s10_svc_attach),
{ 0, 0 }
};
static driver_t s10_svc_driver = {
"s10_svc",
s10_svc_methods,
sizeof(struct s10_svc_softc),
};
EARLY_DRIVER_MODULE(s10_svc, firmware, s10_svc_driver, 0, 0,
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);