stratix10-svc.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause
    3  *
    4  * Copyright (c) 2019 Ruslan Bukin <br@bsdpad.com>
    5  *
    6  * This software was developed by SRI International and the University of
    7  * Cambridge Computer Laboratory (Department of Computer Science and
    8  * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
    9  * DARPA SSITH research programme.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * Intel Stratix 10 Service Layer
   35  */
   36 
   37 #include <sys/cdefs.h>
   38 __FBSDID("$FreeBSD$");
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/bus.h>
   43 #include <sys/kernel.h>
   44 #include <sys/module.h>
   45 #include <sys/malloc.h>
   46 #include <sys/rman.h>
   47 #include <sys/timeet.h>
   48 #include <sys/timetc.h>
   49 #include <sys/conf.h>
   50 #include <sys/uio.h>
   51 #include <sys/vmem.h>
   52 
   53 #include <vm/vm.h>
   54 #include <vm/pmap.h>
   55 
   56 #include <dev/fdt/simplebus.h>
   57 #include <dev/ofw/openfirm.h>
   58 #include <dev/ofw/ofw_bus.h>
   59 #include <dev/ofw/ofw_bus_subr.h>
   60 
   61 #include <arm64/intel/intel-smc.h>
   62 #include <arm64/intel/stratix10-svc.h>
   63 
   64 #include <machine/bus.h>
   65 #include <machine/cpu.h>
   66 #include <machine/intr.h>
   67 
   68 struct s10_svc_softc {
   69         device_t                dev;
   70         vmem_t                  *vmem;
   71         intel_smc_callfn_t      callfn;
   72 };
   73 
   74 static int
   75 s10_data_claim(struct s10_svc_softc *sc)
   76 {
   77         struct arm_smccc_res res;
   78         register_t a0, a1, a2;
   79         int ret;
   80 
   81         ret = 0;
   82 
   83         while (1) {
   84                 a0 = INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE;
   85                 a1 = 0;
   86                 a2 = 0;
   87 
   88                 ret = sc->callfn(a0, a1, a2, 0, 0, 0, 0, 0, &res);
   89                 if (ret == INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY)
   90                         continue;
   91 
   92                 break;
   93         }
   94 
   95         return (ret);
   96 }
   97 
   98 int
   99 s10_svc_send(device_t dev, struct s10_svc_msg *msg)
  100 {
  101         struct s10_svc_softc *sc;
  102         struct arm_smccc_res res;
  103         register_t a0, a1, a2;
  104         int ret;
  105 
  106         sc = device_get_softc(dev);
  107 
  108         a0 = 0;
  109         a1 = 0;
  110         a2 = 0;
  111 
  112         switch (msg->command) {
  113         case COMMAND_RECONFIG:
  114                 a0 = INTEL_SIP_SMC_FPGA_CONFIG_START;
  115                 a1 = msg->flags;
  116                 break;
  117         case COMMAND_RECONFIG_DATA_SUBMIT:
  118                 a0 = INTEL_SIP_SMC_FPGA_CONFIG_WRITE;
  119                 a1 = (uint64_t)msg->payload;
  120                 a2 = (uint64_t)msg->payload_length;
  121                 break;
  122         case COMMAND_RECONFIG_DATA_CLAIM:
  123                 ret = s10_data_claim(sc);
  124                 return (ret);
  125         default:
  126                 return (-1);
  127         }
  128 
  129         ret = sc->callfn(a0, a1, a2, 0, 0, 0, 0, 0, &res);
  130 
  131         return (ret);
  132 }
  133 
  134 int
  135 s10_svc_allocate_memory(device_t dev, struct s10_svc_mem *mem, int size)
  136 {
  137         struct s10_svc_softc *sc;
  138 
  139         sc = device_get_softc(dev);
  140 
  141         if (size <= 0)
  142                 return (EINVAL);
  143 
  144         if (vmem_alloc(sc->vmem, size,
  145             M_FIRSTFIT | M_NOWAIT, &mem->paddr)) {
  146                 device_printf(dev, "Can't allocate memory\n");
  147                 return (ENOMEM);
  148         }
  149 
  150         mem->size = size;
  151         mem->fill = 0;
  152         mem->vaddr = (vm_offset_t)pmap_mapdev(mem->paddr, mem->size);
  153 
  154         return (0);
  155 }
  156 
  157 void
  158 s10_svc_free_memory(device_t dev, struct s10_svc_mem *mem)
  159 {
  160         struct s10_svc_softc *sc;
  161 
  162         sc = device_get_softc(dev);
  163 
  164         vmem_free(sc->vmem, mem->paddr, mem->size);
  165 }
  166 
  167 static int
  168 s10_get_memory(struct s10_svc_softc *sc)
  169 {
  170         struct arm_smccc_res res;
  171         vmem_addr_t addr;
  172         vmem_size_t size;
  173         vmem_t *vmem;
  174 
  175         sc->callfn(INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM,
  176             0, 0, 0, 0, 0, 0, 0, &res);
  177         if (res.a0 != INTEL_SIP_SMC_STATUS_OK)
  178                 return (ENXIO);
  179 
  180         vmem = vmem_create("stratix10 vmem", 0, 0, PAGE_SIZE,
  181             PAGE_SIZE, M_BESTFIT | M_WAITOK);
  182         if (vmem == NULL)
  183                 return (ENXIO);
  184 
  185         addr = res.a1;
  186         size = res.a2;
  187 
  188         device_printf(sc->dev, "Shared memory address 0x%lx size 0x%lx\n",
  189             addr, size);
  190 
  191         vmem_add(vmem, addr, size, 0);
  192 
  193         sc->vmem = vmem;
  194 
  195         return (0);
  196 }
  197 
  198 static intel_smc_callfn_t
  199 s10_svc_get_callfn(struct s10_svc_softc *sc, phandle_t node)
  200 {
  201         char method[16];
  202 
  203         if ((OF_getprop(node, "method", method, sizeof(method))) > 0) {
  204                 if (strcmp(method, "hvc") == 0)
  205                         return (arm_smccc_hvc);
  206                 else if (strcmp(method, "smc") == 0)
  207                         return (arm_smccc_smc);
  208                 else
  209                         device_printf(sc->dev,
  210                             "Invalid method \"%s\"\n", method);
  211         } else
  212                 device_printf(sc->dev, "SMC method not provided\n");
  213 
  214         return (NULL);
  215 }
  216 
  217 static int
  218 s10_svc_probe(device_t dev)
  219 {
  220 
  221         if (!ofw_bus_status_okay(dev))
  222                 return (ENXIO);
  223 
  224         if (!ofw_bus_is_compatible(dev, "intel,stratix10-svc"))
  225                 return (ENXIO);
  226 
  227         device_set_desc(dev, "Stratix 10 SVC");
  228 
  229         return (BUS_PROBE_DEFAULT);
  230 }
  231 
  232 static int
  233 s10_svc_attach(device_t dev)
  234 {
  235         struct s10_svc_softc *sc;
  236         phandle_t node;
  237 
  238         node = ofw_bus_get_node(dev);
  239 
  240         sc = device_get_softc(dev);
  241         sc->dev = dev;
  242 
  243         if (device_get_unit(dev) != 0)
  244                 return (ENXIO);
  245 
  246         sc->callfn = s10_svc_get_callfn(sc, node);
  247         if (sc->callfn == NULL)
  248                 return (ENXIO);
  249 
  250         if (s10_get_memory(sc) != 0)
  251                 return (ENXIO);
  252 
  253         return (0);
  254 }
  255 
  256 static device_method_t s10_svc_methods[] = {
  257         DEVMETHOD(device_probe,         s10_svc_probe),
  258         DEVMETHOD(device_attach,        s10_svc_attach),
  259         { 0, 0 }
  260 };
  261 
  262 static driver_t s10_svc_driver = {
  263         "s10_svc",
  264         s10_svc_methods,
  265         sizeof(struct s10_svc_softc),
  266 };
  267 
  268 EARLY_DRIVER_MODULE(s10_svc, firmware, s10_svc_driver, 0, 0,
  269     BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);

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FreeBSD/Linux Kernel Cross Reference sys/arm64/intel/stratix10-svc.c

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sys/arm64/intel/stratix10-svc.c