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 FPGA Manager. 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/sx.h> 52 53 #include <dev/ofw/openfirm.h> 54 #include <dev/ofw/ofw_bus.h> 55 #include <dev/ofw/ofw_bus_subr.h> 56 57 #include <arm64/intel/stratix10-svc.h> 58 59 #include <machine/bus.h> 60 #include <machine/cpu.h> 61 #include <machine/intr.h> 62 63 #define SVC_BUF_SIZE (2 * 1024 * 1024) 64 65 struct fpgamgr_s10_softc { 66 struct cdev *mgr_cdev; 67 struct cdev *mgr_cdev_partial; 68 device_t dev; 69 device_t s10_svc_dev; 70 struct s10_svc_mem mem; 71 struct sx sx; 72 int opened; 73 }; 74 75 static int 76 fpga_open(struct cdev *dev, int flags __unused, 77 int fmt __unused, struct thread *td __unused) 78 { 79 struct fpgamgr_s10_softc *sc; 80 struct s10_svc_msg msg; 81 int ret; 82 int err; 83 84 sc = dev->si_drv1; 85 86 sx_xlock(&sc->sx); 87 if (sc->opened) { 88 sx_xunlock(&sc->sx); 89 return (EBUSY); 90 } 91 92 err = s10_svc_allocate_memory(sc->s10_svc_dev, 93 &sc->mem, SVC_BUF_SIZE); 94 if (err != 0) { 95 sx_xunlock(&sc->sx); 96 return (ENXIO); 97 } 98 99 bzero(&msg, sizeof(struct s10_svc_msg)); 100 msg.command = COMMAND_RECONFIG; 101 if (dev == sc->mgr_cdev_partial) 102 msg.flags |= COMMAND_RECONFIG_FLAG_PARTIAL; 103 ret = s10_svc_send(sc->s10_svc_dev, &msg); 104 if (ret != 0) { 105 sx_xunlock(&sc->sx); 106 return (ENXIO); 107 } 108 109 sc->opened = 1; 110 sx_xunlock(&sc->sx); 111 112 return (0); 113 } 114 115 static int 116 fpga_write(struct cdev *dev, struct uio *uio, int ioflag) 117 { 118 struct fpgamgr_s10_softc *sc; 119 vm_offset_t addr; 120 int amnt; 121 122 sc = dev->si_drv1; 123 124 sx_xlock(&sc->sx); 125 if (sc->opened == 0) { 126 /* Device closed. */ 127 sx_xunlock(&sc->sx); 128 return (ENXIO); 129 } 130 131 while (uio->uio_resid > 0) { 132 addr = sc->mem.vaddr + sc->mem.fill; 133 if (sc->mem.fill >= SVC_BUF_SIZE) 134 return (ENOMEM); 135 amnt = MIN(uio->uio_resid, (SVC_BUF_SIZE - sc->mem.fill)); 136 uiomove((void *)addr, amnt, uio); 137 sc->mem.fill += amnt; 138 } 139 140 sx_xunlock(&sc->sx); 141 142 return (0); 143 } 144 145 static int 146 fpga_close(struct cdev *dev, int flags __unused, 147 int fmt __unused, struct thread *td __unused) 148 { 149 struct fpgamgr_s10_softc *sc; 150 struct s10_svc_msg msg; 151 int ret; 152 153 sc = dev->si_drv1; 154 155 sx_xlock(&sc->sx); 156 if (sc->opened == 0) { 157 /* Device closed. */ 158 sx_xunlock(&sc->sx); 159 return (ENXIO); 160 } 161 162 /* Submit bitstream */ 163 bzero(&msg, sizeof(struct s10_svc_msg)); 164 msg.command = COMMAND_RECONFIG_DATA_SUBMIT; 165 msg.payload = (void *)sc->mem.paddr; 166 msg.payload_length = sc->mem.fill; 167 ret = s10_svc_send(sc->s10_svc_dev, &msg); 168 if (ret != 0) { 169 device_printf(sc->dev, "Failed to submit data\n"); 170 s10_svc_free_memory(sc->s10_svc_dev, &sc->mem); 171 sc->opened = 0; 172 sx_xunlock(&sc->sx); 173 return (0); 174 } 175 176 /* Claim memory buffer back */ 177 bzero(&msg, sizeof(struct s10_svc_msg)); 178 msg.command = COMMAND_RECONFIG_DATA_CLAIM; 179 s10_svc_send(sc->s10_svc_dev, &msg); 180 181 s10_svc_free_memory(sc->s10_svc_dev, &sc->mem); 182 sc->opened = 0; 183 sx_xunlock(&sc->sx); 184 185 return (0); 186 } 187 188 static int 189 fpga_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, 190 struct thread *td) 191 { 192 193 return (0); 194 } 195 196 static struct cdevsw fpga_cdevsw = { 197 .d_version = D_VERSION, 198 .d_open = fpga_open, 199 .d_close = fpga_close, 200 .d_write = fpga_write, 201 .d_ioctl = fpga_ioctl, 202 .d_name = "FPGA Manager", 203 }; 204 205 static int 206 fpgamgr_s10_probe(device_t dev) 207 { 208 209 if (!ofw_bus_status_okay(dev)) 210 return (ENXIO); 211 212 if (!ofw_bus_is_compatible(dev, "intel,stratix10-soc-fpga-mgr")) 213 return (ENXIO); 214 215 device_set_desc(dev, "Stratix 10 SOC FPGA Manager"); 216 217 return (BUS_PROBE_DEFAULT); 218 } 219 220 static int 221 fpgamgr_s10_attach(device_t dev) 222 { 223 struct fpgamgr_s10_softc *sc; 224 devclass_t dc; 225 226 sc = device_get_softc(dev); 227 sc->dev = dev; 228 229 dc = devclass_find("s10_svc"); 230 if (dc == NULL) 231 return (ENXIO); 232 233 sc->s10_svc_dev = devclass_get_device(dc, 0); 234 if (sc->s10_svc_dev == NULL) 235 return (ENXIO); 236 237 sc->mgr_cdev = make_dev(&fpga_cdevsw, 0, UID_ROOT, GID_WHEEL, 238 0600, "fpga%d", device_get_unit(sc->dev)); 239 if (sc->mgr_cdev == NULL) { 240 device_printf(dev, "Failed to create character device.\n"); 241 return (ENXIO); 242 } 243 244 sc->mgr_cdev_partial = make_dev(&fpga_cdevsw, 0, UID_ROOT, GID_WHEEL, 245 0600, "fpga_partial%d", device_get_unit(sc->dev)); 246 if (sc->mgr_cdev_partial == NULL) { 247 device_printf(dev, "Failed to create character device.\n"); 248 return (ENXIO); 249 } 250 251 sx_init(&sc->sx, "s10 fpga"); 252 253 sc->mgr_cdev->si_drv1 = sc; 254 sc->mgr_cdev_partial->si_drv1 = sc; 255 256 return (0); 257 } 258 259 static int 260 fpgamgr_s10_detach(device_t dev) 261 { 262 struct fpgamgr_s10_softc *sc; 263 264 sc = device_get_softc(dev); 265 266 destroy_dev(sc->mgr_cdev); 267 destroy_dev(sc->mgr_cdev_partial); 268 269 sx_destroy(&sc->sx); 270 271 return (0); 272 } 273 274 static device_method_t fpgamgr_s10_methods[] = { 275 DEVMETHOD(device_probe, fpgamgr_s10_probe), 276 DEVMETHOD(device_attach, fpgamgr_s10_attach), 277 DEVMETHOD(device_detach, fpgamgr_s10_detach), 278 { 0, 0 } 279 }; 280 281 static driver_t fpgamgr_s10_driver = { 282 "fpgamgr_s10", 283 fpgamgr_s10_methods, 284 sizeof(struct fpgamgr_s10_softc), 285 }; 286 287 DRIVER_MODULE(fpgamgr_s10, simplebus, fpgamgr_s10_driver, 0, 0); 288