grf.c revision 1.44
1 /* $NetBSD: grf.c,v 1.44 2014/07/25 08:10:35 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah $Hdr: grf.c 1.36 93/08/13$ 37 * 38 * @(#)grf.c 8.4 (Berkeley) 1/12/94 39 */ 40 41 /* 42 * Graphics display driver for the X68K machines. 43 * This is the hardware-independent portion of the driver. 44 * Hardware access is through the machine dependent grf switch routines. 45 */ 46 47 #include <sys/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: grf.c,v 1.44 2014/07/25 08:10:35 dholland Exp $"); 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/device.h> 53 #include <sys/proc.h> 54 #include <sys/resourcevar.h> 55 #include <sys/ioctl.h> 56 #include <sys/file.h> 57 #include <sys/malloc.h> 58 #include <sys/vnode.h> 59 #include <sys/mman.h> 60 #include <sys/conf.h> 61 62 #include <machine/cpu.h> 63 #include <machine/grfioctl.h> 64 65 #include <x68k/dev/grfvar.h> 66 #include <x68k/dev/itevar.h> 67 68 #include <uvm/uvm_extern.h> 69 #include <uvm/uvm_map.h> 70 71 #include <miscfs/specfs/specdev.h> 72 73 #include "ite.h" 74 #if NITE == 0 75 #define iteon(u,f) 0 76 #define iteoff(u,f) 77 #define ite_reinit(u) 78 #endif 79 80 #ifdef DEBUG 81 int grfdebug = 0; 82 #define GDB_DEVNO 0x01 83 #define GDB_MMAP 0x02 84 #define GDB_IOMAP 0x04 85 #define GDB_LOCK 0x08 86 #endif 87 88 static int grfon(struct grf_softc *); 89 static int grfoff(struct grf_softc *); 90 static off_t grfaddr(struct grf_softc *, off_t); 91 static int grfmap(dev_t, void **, struct proc *); 92 static int grfunmap(dev_t, void *, struct proc *); 93 94 extern struct cfdriver grf_cd; 95 96 dev_type_open(grfopen); 97 dev_type_close(grfclose); 98 dev_type_ioctl(grfioctl); 99 dev_type_mmap(grfmmap); 100 101 const struct cdevsw grf_cdevsw = { 102 .d_open = grfopen, 103 .d_close = grfclose, 104 .d_read = nullread, 105 .d_write = nullwrite, 106 .d_ioctl = grfioctl, 107 .d_stop = nostop, 108 .d_tty = notty, 109 .d_poll = nopoll, 110 .d_mmap = grfmmap, 111 .d_kqfilter = nokqfilter, 112 .d_discard = nodiscard, 113 .d_flag = 0 114 }; 115 116 /*ARGSUSED*/ 117 int 118 grfopen(dev_t dev, int flags, int mode, struct lwp *l) 119 { 120 struct grf_softc *gp; 121 int error = 0; 122 123 gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 124 if (gp == NULL) 125 return ENXIO; 126 127 if ((gp->g_flags & GF_ALIVE) == 0) 128 return ENXIO; 129 130 if ((gp->g_flags & (GF_OPEN|GF_EXCLUDE)) == (GF_OPEN|GF_EXCLUDE)) 131 return EBUSY; 132 133 /* 134 * First open. 135 * XXX: always put in graphics mode. 136 */ 137 error = 0; 138 if ((gp->g_flags & GF_OPEN) == 0) { 139 gp->g_flags |= GF_OPEN; 140 error = grfon(gp); 141 } 142 return error; 143 } 144 145 /*ARGSUSED*/ 146 int 147 grfclose(dev_t dev, int flags, int mode, struct lwp *l) 148 { 149 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 150 151 if ((gp->g_flags & GF_ALIVE) == 0) 152 return ENXIO; 153 154 (void) grfoff(gp); 155 gp->g_flags &= GF_ALIVE; 156 157 return 0; 158 } 159 160 /*ARGSUSED*/ 161 int 162 grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 163 { 164 int unit = GRFUNIT(dev); 165 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 166 int error; 167 168 if ((gp->g_flags & GF_ALIVE) == 0) 169 return ENXIO; 170 171 error = 0; 172 switch (cmd) { 173 174 case GRFIOCGINFO: 175 memcpy(data, (void *)&gp->g_display, sizeof(struct grfinfo)); 176 break; 177 178 case GRFIOCON: 179 error = grfon(gp); 180 break; 181 182 case GRFIOCOFF: 183 error = grfoff(gp); 184 break; 185 186 case GRFIOCMAP: 187 error = grfmap(dev, (void **)data, l->l_proc); 188 break; 189 190 case GRFIOCUNMAP: 191 error = grfunmap(dev, *(void **)data, l->l_proc); 192 break; 193 194 case GRFSETVMODE: 195 error = (*gp->g_sw->gd_mode)(gp, GM_GRFSETVMODE, data); 196 if (error == 0) 197 ite_reinit(unit); 198 break; 199 200 default: 201 error = EINVAL; 202 break; 203 204 } 205 return error; 206 } 207 208 /*ARGSUSED*/ 209 paddr_t 210 grfmmap(dev_t dev, off_t off, int prot) 211 { 212 213 return grfaddr(device_lookup_private(&grf_cd, GRFUNIT(dev)), off); 214 } 215 216 int 217 grfon(struct grf_softc *gp) 218 { 219 int unit = device_unit(gp->g_device); 220 221 /* 222 * XXX: iteoff call relies on devices being in same order 223 * as ITEs and the fact that iteoff only uses the minor part 224 * of the dev arg. 225 */ 226 iteoff(unit, 2); 227 228 return (*gp->g_sw->gd_mode)(gp, GM_GRFON, (void *) 0); 229 } 230 231 int 232 grfoff(struct grf_softc *gp) 233 { 234 int unit = device_unit(gp->g_device); 235 int error; 236 237 #if 0 /* always fails in EINVAL... */ 238 (void) grfunmap(dev, (void *) 0, curproc); 239 #endif 240 error = (*gp->g_sw->gd_mode)(gp, GM_GRFOFF, (void *) 0); 241 /* XXX: see comment for iteoff above */ 242 iteon(unit, 2); 243 244 return error; 245 } 246 247 off_t 248 grfaddr(struct grf_softc *gp, off_t off) 249 { 250 struct grfinfo *gi = &gp->g_display; 251 252 /* control registers */ 253 if (off >= 0 && off < gi->gd_regsize) 254 return ((u_int)gi->gd_regaddr + off) >> PGSHIFT; 255 256 /* frame buffer */ 257 if (off >= gi->gd_regsize && off < gi->gd_regsize+gi->gd_fbsize) { 258 off -= gi->gd_regsize; 259 return ((u_int)gi->gd_fbaddr + off) >> PGSHIFT; 260 } 261 /* bogus */ 262 return -1; 263 } 264 265 int 266 grfmap(dev_t dev, void **addrp, struct proc *p) 267 { 268 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 269 int len, error; 270 struct vnode vn; 271 int flags; 272 273 #ifdef DEBUG 274 if (grfdebug & GDB_MMAP) 275 printf("grfmap(%d): addr %p\n", p->p_pid, *addrp); 276 #endif 277 278 len = gp->g_display.gd_regsize + gp->g_display.gd_fbsize; 279 flags = MAP_SHARED; 280 if (*addrp) 281 flags |= MAP_FIXED; 282 else 283 *addrp = (void *)p->p_emul->e_vm_default_addr(p, 284 (vaddr_t)p->p_vmspace->vm_daddr, len); 285 286 vn.v_type = VCHR; /* XXX */ 287 vn.v_rdev = dev; /* XXX */ 288 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 289 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 290 flags, (void *)&vn, 0, 291 p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 292 if (error == 0) 293 (void) (*gp->g_sw->gd_mode)(gp, GM_MAP, *addrp); 294 295 return error; 296 } 297 298 int 299 grfunmap(dev_t dev, void *addr, struct proc *p) 300 { 301 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 302 vsize_t size; 303 304 #ifdef DEBUG 305 if (grfdebug & GDB_MMAP) { 306 printf("grfunmap(%d): dev %x addr %p\n", 307 p->p_pid, GRFUNIT(dev), addr); 308 } 309 #endif 310 if (addr == 0) 311 return EINVAL; /* XXX: how do we deal with this? */ 312 (void) (*gp->g_sw->gd_mode)(gp, GM_UNMAP, 0); 313 size = round_page(gp->g_display.gd_regsize + gp->g_display.gd_fbsize); 314 uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, 315 (vaddr_t)addr + size); 316 317 return 0; 318 } 319
Indexes created Thu Sep 25 08:09:54 GMT 2025