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/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <sys/malloc.h> 43 #include <sys/rman.h> 44 #include <sys/timeet.h> 45 #include <sys/timetc.h> 46 #include <sys/conf.h> 47 #include <sys/uio.h> 48 #include <sys/vmem.h> 49 50 #include <vm/vm.h> 51 #include <vm/pmap.h> 52 53 #include <dev/fdt/simplebus.h> 54 #include <dev/ofw/openfirm.h> 55 #include <dev/ofw/ofw_bus.h> 56 #include <dev/ofw/ofw_bus_subr.h> 57 58 #include <arm64/intel/intel-smc.h> 59 #include <arm64/intel/stratix10-svc.h> 60 61 #include <machine/bus.h> 62 #include <machine/cpu.h> 63 #include <machine/intr.h> 64 65 struct s10_svc_softc { 66 device_t dev; 67 vmem_t *vmem; 68 intel_smc_callfn_t callfn; 69 }; 70 71 static int 72 s10_data_claim(struct s10_svc_softc *sc) 73 { 74 struct arm_smccc_res res; 75 register_t a0, a1, a2; 76 int ret; 77 78 ret = 0; 79 80 while (1) { 81 a0 = INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE; 82 a1 = 0; 83 a2 = 0; 84 85 ret = sc->callfn(a0, a1, a2, 0, 0, 0, 0, 0, &res); 86 if (ret == INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY) 87 continue; 88 89 break; 90 } 91 92 return (ret); 93 } 94 95 int 96 s10_svc_send(device_t dev, struct s10_svc_msg *msg) 97 { 98 struct s10_svc_softc *sc; 99 struct arm_smccc_res res; 100 register_t a0, a1, a2; 101 int ret; 102 103 sc = device_get_softc(dev); 104 105 a0 = 0; 106 a1 = 0; 107 a2 = 0; 108 109 switch (msg->command) { 110 case COMMAND_RECONFIG: 111 a0 = INTEL_SIP_SMC_FPGA_CONFIG_START; 112 a1 = msg->flags; 113 break; 114 case COMMAND_RECONFIG_DATA_SUBMIT: 115 a0 = INTEL_SIP_SMC_FPGA_CONFIG_WRITE; 116 a1 = (uint64_t)msg->payload; 117 a2 = (uint64_t)msg->payload_length; 118 break; 119 case COMMAND_RECONFIG_DATA_CLAIM: 120 ret = s10_data_claim(sc); 121 return (ret); 122 default: 123 return (-1); 124 } 125 126 ret = sc->callfn(a0, a1, a2, 0, 0, 0, 0, 0, &res); 127 128 return (ret); 129 } 130 131 int 132 s10_svc_allocate_memory(device_t dev, struct s10_svc_mem *mem, int size) 133 { 134 struct s10_svc_softc *sc; 135 136 sc = device_get_softc(dev); 137 138 if (size <= 0) 139 return (EINVAL); 140 141 if (vmem_alloc(sc->vmem, size, 142 M_FIRSTFIT | M_NOWAIT, &mem->paddr)) { 143 device_printf(dev, "Can't allocate memory\n"); 144 return (ENOMEM); 145 } 146 147 mem->size = size; 148 mem->fill = 0; 149 mem->vaddr = (vm_offset_t)pmap_mapdev(mem->paddr, mem->size); 150 151 return (0); 152 } 153 154 void 155 s10_svc_free_memory(device_t dev, struct s10_svc_mem *mem) 156 { 157 struct s10_svc_softc *sc; 158 159 sc = device_get_softc(dev); 160 161 vmem_free(sc->vmem, mem->paddr, mem->size); 162 } 163 164 static int 165 s10_get_memory(struct s10_svc_softc *sc) 166 { 167 struct arm_smccc_res res; 168 vmem_addr_t addr; 169 vmem_size_t size; 170 vmem_t *vmem; 171 172 sc->callfn(INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM, 173 0, 0, 0, 0, 0, 0, 0, &res); 174 if (res.a0 != INTEL_SIP_SMC_STATUS_OK) 175 return (ENXIO); 176 177 vmem = vmem_create("stratix10 vmem", 0, 0, PAGE_SIZE, 178 PAGE_SIZE, M_BESTFIT | M_WAITOK); 179 if (vmem == NULL) 180 return (ENXIO); 181 182 addr = res.a1; 183 size = res.a2; 184 185 device_printf(sc->dev, "Shared memory address 0x%lx size 0x%lx\n", 186 addr, size); 187 188 vmem_add(vmem, addr, size, 0); 189 190 sc->vmem = vmem; 191 192 return (0); 193 } 194 195 static intel_smc_callfn_t 196 s10_svc_get_callfn(struct s10_svc_softc *sc, phandle_t node) 197 { 198 char method[16]; 199 200 if ((OF_getprop(node, "method", method, sizeof(method))) > 0) { 201 if (strcmp(method, "hvc") == 0) 202 return (arm_smccc_hvc); 203 else if (strcmp(method, "smc") == 0) 204 return (arm_smccc_smc); 205 else 206 device_printf(sc->dev, 207 "Invalid method \"%s\"\n", method); 208 } else 209 device_printf(sc->dev, "SMC method not provided\n"); 210 211 return (NULL); 212 } 213 214 static int 215 s10_svc_probe(device_t dev) 216 { 217 218 if (!ofw_bus_status_okay(dev)) 219 return (ENXIO); 220 221 if (!ofw_bus_is_compatible(dev, "intel,stratix10-svc")) 222 return (ENXIO); 223 224 device_set_desc(dev, "Stratix 10 SVC"); 225 226 return (BUS_PROBE_DEFAULT); 227 } 228 229 static int 230 s10_svc_attach(device_t dev) 231 { 232 struct s10_svc_softc *sc; 233 phandle_t node; 234 235 node = ofw_bus_get_node(dev); 236 237 sc = device_get_softc(dev); 238 sc->dev = dev; 239 240 if (device_get_unit(dev) != 0) 241 return (ENXIO); 242 243 sc->callfn = s10_svc_get_callfn(sc, node); 244 if (sc->callfn == NULL) 245 return (ENXIO); 246 247 if (s10_get_memory(sc) != 0) 248 return (ENXIO); 249 250 return (0); 251 } 252 253 static device_method_t s10_svc_methods[] = { 254 DEVMETHOD(device_probe, s10_svc_probe), 255 DEVMETHOD(device_attach, s10_svc_attach), 256 { 0, 0 } 257 }; 258 259 static driver_t s10_svc_driver = { 260 "s10_svc", 261 s10_svc_methods, 262 sizeof(struct s10_svc_softc), 263 }; 264 265 EARLY_DRIVER_MODULE(s10_svc, simplebus, s10_svc_driver, 0, 0, 266 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 267