Date: Sun, 19 Oct 2014 16:26:50 +0000 (UTC) From: Ruslan Bukin <br@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r273278 - in head/sys: arm/altera/socfpga arm/conf boot/fdt/dts/arm dev/beri Message-ID: <201410191626.s9JGQoul030672@svn.freebsd.org>
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Author: br Date: Sun Oct 19 16:26:49 2014 New Revision: 273278 URL: https://svnweb.freebsd.org/changeset/base/273278 Log: Add driver for BERI soft processor 'ring buffer' device. Ring device provides a way for communicate to BERI peripherals such as BERI debug unit and console. Sponsored by: DARPA, AFRL Added: head/sys/arm/conf/SOCKIT-BERI (contents, props changed) head/sys/boot/fdt/dts/arm/socfpga-sockit-beri.dts (contents, props changed) head/sys/dev/beri/ head/sys/dev/beri/beri_ring.c (contents, props changed) Modified: head/sys/arm/altera/socfpga/files.socfpga Modified: head/sys/arm/altera/socfpga/files.socfpga ============================================================================== --- head/sys/arm/altera/socfpga/files.socfpga Sun Oct 19 12:11:25 2014 (r273277) +++ head/sys/arm/altera/socfpga/files.socfpga Sun Oct 19 16:26:49 2014 (r273278) @@ -21,3 +21,4 @@ arm/altera/socfpga/socfpga_mp.c option dev/dwc/if_dwc.c optional dwc dev/mmc/host/dwmmc.c optional dwmmc +dev/beri/beri_ring.c optional beri_ring Added: head/sys/arm/conf/SOCKIT-BERI ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/conf/SOCKIT-BERI Sun Oct 19 16:26:49 2014 (r273278) @@ -0,0 +1,140 @@ +# Kernel configuration for Terasic SoCKit (Altera Cyclone V SoC). +# +# For more information on this file, please read the config(5) manual page, +# and/or the handbook section on Kernel Configuration Files: +# +# http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html +# +# The handbook is also available locally in /usr/share/doc/handbook +# if you've installed the doc distribution, otherwise always see the +# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the +# latest information. +# +# An exhaustive list of options and more detailed explanations of the +# device lines is also present in the ../../conf/NOTES and NOTES files. +# If you are in doubt as to the purpose or necessity of a line, check first +# in NOTES. +# +# $FreeBSD$ + +ident SOCKIT-BERI +include "../altera/socfpga/std.socfpga" + +makeoptions MODULES_OVERRIDE="" + +makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols +makeoptions WERROR="-Werror" + +options HZ=100 +options SCHED_4BSD # 4BSD scheduler +options INET # InterNETworking +options INET6 # IPv6 communications protocols +options GEOM_PART_BSD # BSD partition scheme +options GEOM_PART_MBR # MBR partition scheme +options GEOM_PART_GPT # GUID partition tables +options TMPFS # Efficient memory filesystem +options FFS # Berkeley Fast Filesystem +options SOFTUPDATES +options UFS_ACL # Support for access control lists +options UFS_DIRHASH # Improve performance on big directories +options MSDOSFS # MSDOS Filesystem +options CD9660 # ISO 9660 Filesystem +options PROCFS # Process filesystem (requires PSEUDOFS) +options PSEUDOFS # Pseudo-filesystem framework +options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!] +options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI +options KTRACE +options SYSVSHM # SYSV-style shared memory +options SYSVMSG # SYSV-style message queues +options SYSVSEM # SYSV-style semaphores +options _KPOSIX_PRIORITY_SCHEDULING # Posix P1003_1B real-time extensions +options KBD_INSTALL_CDEV +options PREEMPTION +options FREEBSD_BOOT_LOADER +options VFP # vfp/neon + +options SMP + +# Debugging +makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols +options BREAK_TO_DEBUGGER +#options VERBOSE_SYSINIT # Enable verbose sysinit messages +options KDB +options DDB # Enable the kernel debugger +options INVARIANTS # Enable calls of extra sanity checking +options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS +#options WITNESS # Enable checks to detect deadlocks and cycles +#options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed +#options DIAGNOSTIC + +# NFS support +options NFSCL # Network Filesystem Client +options NFSLOCKD # Network Lock Manager +options NFS_ROOT # NFS usable as /, requires NFSCLIENT + +# Uncomment this for NFS root +#options NFS_ROOT # NFS usable as /, requires NFSCL +#options BOOTP_NFSROOT +#options BOOTP_COMPAT +#options BOOTP +#options BOOTP_NFSV3 +#options BOOTP_WIRED_TO=ue0 + +device mmc # mmc/sd bus +device mmcsd # mmc/sd flash cards +device dwmmc + +options ROOTDEVNAME=\"ufs:/dev/mmcsd0s4\" + +# Pseudo devices + +device loop +device random +device pty +device md +device gpio + +# USB support +options USB_HOST_ALIGN=64 # Align usb buffers to cache line size. +device usb +options USB_DEBUG +#options USB_REQ_DEBUG +#options USB_VERBOSE +#device musb +device dwcotg + +device umass +device scbus # SCSI bus (required for ATA/SCSI) +device da # Direct Access (disks) +device pass + +# Serial ports +device uart +device uart_ns8250 + +# I2C (TWSI) +device iic +device iicbus + +# SPI +device spibus + +# BERI specific +device beri_ring + +# Ethernet +device ether +device mii +device smsc +device smscphy +device dwc + +# USB ethernet support, requires miibus +device miibus +device axe # ASIX Electronics USB Ethernet +device bpf # Berkeley packet filter + +#FDT +options FDT +options FDT_DTB_STATIC +makeoptions FDT_DTS_FILE=socfpga-sockit-beri.dts Added: head/sys/boot/fdt/dts/arm/socfpga-sockit-beri.dts ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/boot/fdt/dts/arm/socfpga-sockit-beri.dts Sun Oct 19 16:26:49 2014 (r273278) @@ -0,0 +1,109 @@ +/*- + * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * This software was developed by SRI International and the University of + * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) + * ("CTSRD"), as part of the DARPA CRASH 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. + * + * $FreeBSD$ + */ + +/dts-v1/; + +/include/ "socfpga.dtsi" + +/ { + model = "Terasic SoCKit"; + compatible = "altr,socfpga-cyclone5", "altr,socfpga"; + + /* Reserve first page for secondary CPU trampoline code */ + memreserve = < 0x00000000 0x1000 >; + + memory { + device_type = "memory"; + reg = < 0x00000000 0x40000000 >; /* 1G RAM */ + }; + + SOC: socfpga { + serial0: serial@ffc02000 { + status = "okay"; + }; + + usb1: usb@ffb40000 { + status = "okay"; + }; + + gmac1: ethernet@ff702000 { + status = "okay"; + }; + + mmc: dwmmc@ff704000 { + status = "okay"; + num-slots = <1>; + supports-highspeed; + broken-cd; + bus-frequency = <25000000>; + + slot@0 { + reg = <0>; + bus-width = <4>; + }; + }; + + beri_debug: ring@c0000000 { + compatible = "sri-cambridge,beri-ring"; + reg = <0xc0000000 0x3000>; + interrupts = < 72 73 >; + interrupt-parent = <&GIC>; + device_name = "beri_debug"; + data_size = <0x1000>; + data_read = <0x0>; + data_write = <0x1000>; + control_read = <0x2000>; + control_write = <0x2010>; + status = "okay"; + }; + + beri_console: ring@c0004000 { + compatible = "sri-cambridge,beri-ring"; + reg = <0xc0004000 0x3000>; + interrupts = < 74 75 >; + interrupt-parent = <&GIC>; + device_name = "beri_console"; + data_size = <0x1000>; + data_read = <0x0>; + data_write = <0x1000>; + control_read = <0x2000>; + control_write = <0x2010>; + status = "okay"; + }; + }; + + chosen { + bootargs = "-v"; + stdin = "serial0"; + stdout = "serial0"; + }; +}; Added: head/sys/dev/beri/beri_ring.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/beri/beri_ring.c Sun Oct 19 16:26:49 2014 (r273278) @@ -0,0 +1,529 @@ +/*- + * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * This software was developed by SRI International and the University of + * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) + * ("CTSRD"), as part of the DARPA CRASH 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. + */ + +/* + * SRI-Cambridge BERI soft processor <-> ARM core ring buffer. + */ + +#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/stat.h> +#include <sys/time.h> +#include <sys/event.h> +#include <sys/selinfo.h> + +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <machine/bus.h> +#include <machine/fdt.h> +#include <machine/cpu.h> +#include <machine/intr.h> + +#define READ4(_sc, _reg) \ + bus_read_4((_sc)->res[0], _reg) +#define WRITE4(_sc, _reg, _val) \ + bus_write_4((_sc)->res[0], _reg, _val) + +#define CDES_INT_EN (1 << 15) +#define CDES_CAUSE_MASK 0x3 +#define CDES_CAUSE_SHIFT 13 +#define DEVNAME_MAXLEN 256 + +typedef struct +{ + uint16_t cdes; + uint16_t interrupt_level; + uint16_t in; + uint16_t out; +} control_reg_t; + +struct beri_softc { + struct resource *res[3]; + bus_space_tag_t bst; + bus_space_handle_t bsh; + struct cdev *cdev; + device_t dev; + void *read_ih; + void *write_ih; + struct selinfo beri_rsel; + struct mtx beri_mtx; + int opened; + + char devname[DEVNAME_MAXLEN]; + int control_read; + int control_write; + int data_read; + int data_write; + int data_size; +}; + +static struct resource_spec beri_spec[] = { + { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { SYS_RES_IRQ, 0, RF_ACTIVE }, + { SYS_RES_IRQ, 1, RF_ACTIVE }, + { -1, 0 } +}; + +static control_reg_t +get_control_reg(struct beri_softc *sc, int dir) +{ + uint32_t offset; + uint16_t dst[4]; + control_reg_t c; + uint16_t *cp; + int i; + + cp = (uint16_t *)&c; + + offset = dir ? sc->control_write : sc->control_read; + ((uint32_t *)dst)[0] = READ4(sc, offset); + ((uint32_t *)dst)[1] = READ4(sc, offset + 4); + + for (i = 0; i < 4; i++) + cp[i] = dst[3 - i]; + + return (c); +} + +static void +set_control_reg(struct beri_softc *sc, int dir, control_reg_t *c) +{ + uint32_t offset; + uint16_t src[4]; + uint16_t *cp; + int i; + + cp = (uint16_t *)c; + + for (i = 0; i < 4; i++) + src[3 - i] = cp[i]; + + offset = dir ? sc->control_write : sc->control_read; + WRITE4(sc, offset + 0, ((uint32_t *)src)[0]); + WRITE4(sc, offset + 4, ((uint32_t *)src)[1]); +} + +static int +get_stock(struct beri_softc *sc, int dir, control_reg_t *c) +{ + uint32_t fill; + + fill = (c->in - c->out + sc->data_size) % sc->data_size; + + if (dir) + return (sc->data_size - fill - 1); + else + return (fill); +} + +static void +beri_intr_write(void *arg) +{ + struct beri_softc *sc; + control_reg_t c; + + sc = arg; + + c = get_control_reg(sc, 1); + if (c.cdes & CDES_INT_EN) { + c.cdes &= ~(CDES_INT_EN); + set_control_reg(sc, 1, &c); + } + + mtx_lock(&sc->beri_mtx); + selwakeuppri(&sc->beri_rsel, PZERO + 1); + KNOTE_LOCKED(&sc->beri_rsel.si_note, 0); + mtx_unlock(&sc->beri_mtx); +} + +static void +beri_intr_read(void *arg) +{ + struct beri_softc *sc; + control_reg_t c; + + sc = arg; + + c = get_control_reg(sc, 0); + if (c.cdes & CDES_INT_EN) { + c.cdes &= ~(CDES_INT_EN); + set_control_reg(sc, 0, &c); + } + + mtx_lock(&sc->beri_mtx); + selwakeuppri(&sc->beri_rsel, PZERO + 1); + KNOTE_LOCKED(&sc->beri_rsel.si_note, 0); + mtx_unlock(&sc->beri_mtx); +} + +static int +beri_open(struct cdev *dev, int flags __unused, + int fmt __unused, struct thread *td __unused) +{ + struct beri_softc *sc; + control_reg_t c; + + sc = dev->si_drv1; + + if (sc->opened) + return (1); + + /* Setup interrupt handlers */ + if (bus_setup_intr(sc->dev, sc->res[1], INTR_TYPE_BIO | INTR_MPSAFE, + NULL, beri_intr_read, sc, &sc->read_ih)) { + device_printf(sc->dev, "Unable to setup read intr\n"); + return (1); + } + if (bus_setup_intr(sc->dev, sc->res[2], INTR_TYPE_BIO | INTR_MPSAFE, + NULL, beri_intr_write, sc, &sc->write_ih)) { + device_printf(sc->dev, "Unable to setup write intr\n"); + return (1); + } + + sc->opened = 1; + + /* Clear write buffer */ + c = get_control_reg(sc, 1); + c.in = c.out; + c.cdes = 0; + set_control_reg(sc, 1, &c); + + /* Clear read buffer */ + c = get_control_reg(sc, 0); + c.out = c.in; + c.cdes = 0; + set_control_reg(sc, 0, &c); + + return (0); +} + +static int +beri_close(struct cdev *dev, int flags __unused, + int fmt __unused, struct thread *td __unused) +{ + struct beri_softc *sc; + + sc = dev->si_drv1; + + if (sc->opened) { + sc->opened = 0; + + /* Unsetup interrupt handlers */ + bus_teardown_intr(sc->dev, sc->res[1], sc->read_ih); + bus_teardown_intr(sc->dev, sc->res[2], sc->write_ih); + } + + return (0); +} + +static int +beri_rdwr(struct cdev *dev, struct uio *uio, int ioflag) +{ + struct beri_softc *sc; + uint32_t offset; + control_reg_t c; + uint16_t *ptr; + uint8_t *dst; + int stock; + int dir; + int amount; + int count; + + sc = dev->si_drv1; + + dir = uio->uio_rw ? 1 : 0; + + c = get_control_reg(sc, dir); + stock = get_stock(sc, dir, &c); + if (stock < uio->uio_resid) { + device_printf(sc->dev, "Err: no data/space available\n"); + return (1); + } + + amount = uio->uio_resid; + ptr = dir ? &c.in : &c.out; + count = (sc->data_size - *ptr); + + offset = dir ? sc->data_write : sc->data_read; + dst = (uint8_t *)(sc->bsh + offset); + + if (amount <= count) { + uiomove(dst + *ptr, amount, uio); + } else { + uiomove(dst + *ptr, count, uio); + uiomove(dst, (amount - count), uio); + } + + *ptr = (*ptr + amount) % sc->data_size; + set_control_reg(sc, dir, &c); + + return (0); +} + +static int +beri_kqread(struct knote *kn, long hint) +{ + struct beri_softc *sc; + control_reg_t c; + int stock; + + sc = kn->kn_hook; + + c = get_control_reg(sc, 0); + stock = get_stock(sc, 0, &c); + if (stock) { + kn->kn_data = stock; + return (1); + } + + kn->kn_data = 0; + + /* Wait at least one new byte in buffer */ + c.interrupt_level = 1; + + /* Enable interrupts */ + c.cdes |= (CDES_INT_EN); + set_control_reg(sc, 0, &c); + + return (0); +} + +static int +beri_kqwrite(struct knote *kn, long hint) +{ + struct beri_softc *sc; + control_reg_t c; + int stock; + + sc = kn->kn_hook; + + c = get_control_reg(sc, 1); + stock = get_stock(sc, 1, &c); + if (stock) { + kn->kn_data = stock; + return (1); + } + + kn->kn_data = 0; + + /* Wait at least one free position in buffer */ + c.interrupt_level = sc->data_size - 2; + + /* Enable interrupts */ + c.cdes |= (CDES_INT_EN); + set_control_reg(sc, 1, &c); + + return (0); +} + +static void +beri_kqdetach(struct knote *kn) +{ + struct beri_softc *sc; + + sc = kn->kn_hook; + + knlist_remove(&sc->beri_rsel.si_note, kn, 0); +} + +static struct filterops beri_read_filterops = { + .f_isfd = 1, + .f_attach = NULL, + .f_detach = beri_kqdetach, + .f_event = beri_kqread, +}; + +static struct filterops beri_write_filterops = { + .f_isfd = 1, + .f_attach = NULL, + .f_detach = beri_kqdetach, + .f_event = beri_kqwrite, +}; + +static int +beri_kqfilter(struct cdev *dev, struct knote *kn) +{ + struct beri_softc *sc; + + sc = dev->si_drv1; + + switch(kn->kn_filter) { + case EVFILT_READ: + kn->kn_fop = &beri_read_filterops; + break; + case EVFILT_WRITE: + kn->kn_fop = &beri_write_filterops; + break; + default: + return(EINVAL); + } + + kn->kn_hook = sc; + knlist_add(&sc->beri_rsel.si_note, kn, 0); + + return (0); +} + +static struct cdevsw beri_cdevsw = { + .d_version = D_VERSION, + .d_open = beri_open, + .d_close = beri_close, + .d_write = beri_rdwr, + .d_read = beri_rdwr, + .d_kqfilter = beri_kqfilter, + .d_name = "beri ring buffer", +}; + +static int +parse_fdt(struct beri_softc *sc) +{ + pcell_t dts_value[0]; + phandle_t node; + int len; + + if ((node = ofw_bus_get_node(sc->dev)) == -1) + return (ENXIO); + + /* get device name */ + if (OF_getprop(ofw_bus_get_node(sc->dev), "device_name", + &sc->devname, sizeof(sc->devname)) <= 0) { + device_printf(sc->dev, "Can't get device_name\n"); + return (ENXIO); + } + + if ((len = OF_getproplen(node, "data_size")) <= 0) + return (ENXIO); + OF_getencprop(node, "data_size", dts_value, len); + sc->data_size = dts_value[0]; + + if ((len = OF_getproplen(node, "data_read")) <= 0) + return (ENXIO); + OF_getencprop(node, "data_read", dts_value, len); + sc->data_read = dts_value[0]; + + if ((len = OF_getproplen(node, "data_write")) <= 0) + return (ENXIO); + OF_getencprop(node, "data_write", dts_value, len); + sc->data_write = dts_value[0]; + + if ((len = OF_getproplen(node, "control_read")) <= 0) + return (ENXIO); + OF_getencprop(node, "control_read", dts_value, len); + sc->control_read = dts_value[0]; + + if ((len = OF_getproplen(node, "control_write")) <= 0) + return (ENXIO); + OF_getencprop(node, "control_write", dts_value, len); + sc->control_write = dts_value[0]; + + return (0); +} + +static int +beri_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (!ofw_bus_is_compatible(dev, "sri-cambridge,beri-ring")) + return (ENXIO); + + device_set_desc(dev, "SRI-Cambridge BERI ring buffer"); + return (BUS_PROBE_DEFAULT); +} + +static int +beri_attach(device_t dev) +{ + struct beri_softc *sc; + + sc = device_get_softc(dev); + sc->dev = dev; + + if (bus_alloc_resources(dev, beri_spec, sc->res)) { + device_printf(dev, "could not allocate resources\n"); + return (ENXIO); + } + + /* Memory interface */ + sc->bst = rman_get_bustag(sc->res[0]); + sc->bsh = rman_get_bushandle(sc->res[0]); + + if (parse_fdt(sc)) { + device_printf(sc->dev, "Can't get FDT values\n"); + return (ENXIO); + } + + sc->cdev = make_dev(&beri_cdevsw, 0, UID_ROOT, GID_WHEEL, + S_IRWXU, "%s", sc->devname); + if (sc->cdev == NULL) { + device_printf(dev, "Failed to create character device.\n"); + return (ENXIO); + } + + sc->cdev->si_drv1 = sc; + + mtx_init(&sc->beri_mtx, "beri_mtx", NULL, MTX_DEF); + knlist_init_mtx(&sc->beri_rsel.si_note, &sc->beri_mtx); + + return (0); +} + +static device_method_t beri_methods[] = { + DEVMETHOD(device_probe, beri_probe), + DEVMETHOD(device_attach, beri_attach), + { 0, 0 } +}; + +static driver_t beri_driver = { + "beri_ring", + beri_methods, + sizeof(struct beri_softc), +}; + +static devclass_t beri_devclass; + +DRIVER_MODULE(beri_ring, simplebus, beri_driver, beri_devclass, 0, 0);
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