/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2019 Ruslan Bukin * * 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 FPGA Manager. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define SVC_BUF_SIZE (2 * 1024 * 1024) struct fpgamgr_s10_softc { struct cdev *mgr_cdev; struct cdev *mgr_cdev_partial; device_t dev; device_t s10_svc_dev; struct s10_svc_mem mem; struct sx sx; int opened; }; static int fpga_open(struct cdev *dev, int flags __unused, int fmt __unused, struct thread *td __unused) { struct fpgamgr_s10_softc *sc; struct s10_svc_msg msg; int ret; int err; sc = dev->si_drv1; sx_xlock(&sc->sx); if (sc->opened) { sx_xunlock(&sc->sx); return (EBUSY); } err = s10_svc_allocate_memory(sc->s10_svc_dev, &sc->mem, SVC_BUF_SIZE); if (err != 0) { sx_xunlock(&sc->sx); return (ENXIO); } bzero(&msg, sizeof(struct s10_svc_msg)); msg.command = COMMAND_RECONFIG; if (dev == sc->mgr_cdev_partial) msg.flags |= COMMAND_RECONFIG_FLAG_PARTIAL; ret = s10_svc_send(sc->s10_svc_dev, &msg); if (ret != 0) { sx_xunlock(&sc->sx); return (ENXIO); } sc->opened = 1; sx_xunlock(&sc->sx); return (0); } static int fpga_write(struct cdev *dev, struct uio *uio, int ioflag) { struct fpgamgr_s10_softc *sc; vm_offset_t addr; int amnt; sc = dev->si_drv1; sx_xlock(&sc->sx); if (sc->opened == 0) { /* Device closed. */ sx_xunlock(&sc->sx); return (ENXIO); } while (uio->uio_resid > 0) { addr = sc->mem.vaddr + sc->mem.fill; if (sc->mem.fill >= SVC_BUF_SIZE) return (ENOMEM); amnt = MIN(uio->uio_resid, (SVC_BUF_SIZE - sc->mem.fill)); uiomove((void *)addr, amnt, uio); sc->mem.fill += amnt; } sx_xunlock(&sc->sx); return (0); } static int fpga_close(struct cdev *dev, int flags __unused, int fmt __unused, struct thread *td __unused) { struct fpgamgr_s10_softc *sc; struct s10_svc_msg msg; int ret; sc = dev->si_drv1; sx_xlock(&sc->sx); if (sc->opened == 0) { /* Device closed. */ sx_xunlock(&sc->sx); return (ENXIO); } /* Submit bitstream */ bzero(&msg, sizeof(struct s10_svc_msg)); msg.command = COMMAND_RECONFIG_DATA_SUBMIT; msg.payload = (void *)sc->mem.paddr; msg.payload_length = sc->mem.fill; ret = s10_svc_send(sc->s10_svc_dev, &msg); if (ret != 0) { device_printf(sc->dev, "Failed to submit data\n"); s10_svc_free_memory(sc->s10_svc_dev, &sc->mem); sc->opened = 0; sx_xunlock(&sc->sx); return (0); } /* Claim memory buffer back */ bzero(&msg, sizeof(struct s10_svc_msg)); msg.command = COMMAND_RECONFIG_DATA_CLAIM; s10_svc_send(sc->s10_svc_dev, &msg); s10_svc_free_memory(sc->s10_svc_dev, &sc->mem); sc->opened = 0; sx_xunlock(&sc->sx); return (0); } static int fpga_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags, struct thread *td) { return (0); } static struct cdevsw fpga_cdevsw = { .d_version = D_VERSION, .d_open = fpga_open, .d_close = fpga_close, .d_write = fpga_write, .d_ioctl = fpga_ioctl, .d_name = "FPGA Manager", }; static int fpgamgr_s10_probe(device_t dev) { if (!ofw_bus_status_okay(dev)) return (ENXIO); if (!ofw_bus_is_compatible(dev, "intel,stratix10-soc-fpga-mgr")) return (ENXIO); device_set_desc(dev, "Stratix 10 SOC FPGA Manager"); return (BUS_PROBE_DEFAULT); } static int fpgamgr_s10_attach(device_t dev) { struct fpgamgr_s10_softc *sc; devclass_t dc; sc = device_get_softc(dev); sc->dev = dev; dc = devclass_find("s10_svc"); if (dc == NULL) return (ENXIO); sc->s10_svc_dev = devclass_get_device(dc, 0); if (sc->s10_svc_dev == NULL) return (ENXIO); sc->mgr_cdev = make_dev(&fpga_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "fpga%d", device_get_unit(sc->dev)); if (sc->mgr_cdev == NULL) { device_printf(dev, "Failed to create character device.\n"); return (ENXIO); } sc->mgr_cdev_partial = make_dev(&fpga_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "fpga_partial%d", device_get_unit(sc->dev)); if (sc->mgr_cdev_partial == NULL) { device_printf(dev, "Failed to create character device.\n"); return (ENXIO); } sx_init(&sc->sx, "s10 fpga"); sc->mgr_cdev->si_drv1 = sc; sc->mgr_cdev_partial->si_drv1 = sc; return (0); } static int fpgamgr_s10_detach(device_t dev) { struct fpgamgr_s10_softc *sc; sc = device_get_softc(dev); destroy_dev(sc->mgr_cdev); destroy_dev(sc->mgr_cdev_partial); sx_destroy(&sc->sx); return (0); } static device_method_t fpgamgr_s10_methods[] = { DEVMETHOD(device_probe, fpgamgr_s10_probe), DEVMETHOD(device_attach, fpgamgr_s10_attach), DEVMETHOD(device_detach, fpgamgr_s10_detach), { 0, 0 } }; static driver_t fpgamgr_s10_driver = { "fpgamgr_s10", fpgamgr_s10_methods, sizeof(struct fpgamgr_s10_softc), }; DRIVER_MODULE(fpgamgr_s10, simplebus, fpgamgr_s10_driver, 0, 0);