grf.c revision 1.43
1 /* $NetBSD: grf.c,v 1.43 2014/03/16 05:20:26 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 1.43 2014/03/16 05:20:26 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_flag = 0 113 }; 114 115 /*ARGSUSED*/ 116 int 117 grfopen(dev_t dev, int flags, int mode, struct lwp *l) 118 { 119 struct grf_softc *gp; 120 int error = 0; 121 122 gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 123 if (gp == NULL) 124 return ENXIO; 125 126 if ((gp->g_flags & GF_ALIVE) == 0) 127 return ENXIO; 128 129 if ((gp->g_flags & (GF_OPEN|GF_EXCLUDE)) == (GF_OPEN|GF_EXCLUDE)) 130 return EBUSY; 131 132 /* 133 * First open. 134 * XXX: always put in graphics mode. 135 */ 136 error = 0; 137 if ((gp->g_flags & GF_OPEN) == 0) { 138 gp->g_flags |= GF_OPEN; 139 error = grfon(gp); 140 } 141 return error; 142 } 143 144 /*ARGSUSED*/ 145 int 146 grfclose(dev_t dev, int flags, int mode, struct lwp *l) 147 { 148 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 149 150 if ((gp->g_flags & GF_ALIVE) == 0) 151 return ENXIO; 152 153 (void) grfoff(gp); 154 gp->g_flags &= GF_ALIVE; 155 156 return 0; 157 } 158 159 /*ARGSUSED*/ 160 int 161 grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 162 { 163 int unit = GRFUNIT(dev); 164 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 165 int error; 166 167 if ((gp->g_flags & GF_ALIVE) == 0) 168 return ENXIO; 169 170 error = 0; 171 switch (cmd) { 172 173 case GRFIOCGINFO: 174 memcpy(data, (void *)&gp->g_display, sizeof(struct grfinfo)); 175 break; 176 177 case GRFIOCON: 178 error = grfon(gp); 179 break; 180 181 case GRFIOCOFF: 182 error = grfoff(gp); 183 break; 184 185 case GRFIOCMAP: 186 error = grfmap(dev, (void **)data, l->l_proc); 187 break; 188 189 case GRFIOCUNMAP: 190 error = grfunmap(dev, *(void **)data, l->l_proc); 191 break; 192 193 case GRFSETVMODE: 194 error = (*gp->g_sw->gd_mode)(gp, GM_GRFSETVMODE, data); 195 if (error == 0) 196 ite_reinit(unit); 197 break; 198 199 default: 200 error = EINVAL; 201 break; 202 203 } 204 return error; 205 } 206 207 /*ARGSUSED*/ 208 paddr_t 209 grfmmap(dev_t dev, off_t off, int prot) 210 { 211 212 return grfaddr(device_lookup_private(&grf_cd, GRFUNIT(dev)), off); 213 } 214 215 int 216 grfon(struct grf_softc *gp) 217 { 218 int unit = device_unit(gp->g_device); 219 220 /* 221 * XXX: iteoff call relies on devices being in same order 222 * as ITEs and the fact that iteoff only uses the minor part 223 * of the dev arg. 224 */ 225 iteoff(unit, 2); 226 227 return (*gp->g_sw->gd_mode)(gp, GM_GRFON, (void *) 0); 228 } 229 230 int 231 grfoff(struct grf_softc *gp) 232 { 233 int unit = device_unit(gp->g_device); 234 int error; 235 236 #if 0 /* always fails in EINVAL... */ 237 (void) grfunmap(dev, (void *) 0, curproc); 238 #endif 239 error = (*gp->g_sw->gd_mode)(gp, GM_GRFOFF, (void *) 0); 240 /* XXX: see comment for iteoff above */ 241 iteon(unit, 2); 242 243 return error; 244 } 245 246 off_t 247 grfaddr(struct grf_softc *gp, off_t off) 248 { 249 struct grfinfo *gi = &gp->g_display; 250 251 /* control registers */ 252 if (off >= 0 && off < gi->gd_regsize) 253 return ((u_int)gi->gd_regaddr + off) >> PGSHIFT; 254 255 /* frame buffer */ 256 if (off >= gi->gd_regsize && off < gi->gd_regsize+gi->gd_fbsize) { 257 off -= gi->gd_regsize; 258 return ((u_int)gi->gd_fbaddr + off) >> PGSHIFT; 259 } 260 /* bogus */ 261 return -1; 262 } 263 264 int 265 grfmap(dev_t dev, void **addrp, struct proc *p) 266 { 267 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 268 int len, error; 269 struct vnode vn; 270 int flags; 271 272 #ifdef DEBUG 273 if (grfdebug & GDB_MMAP) 274 printf("grfmap(%d): addr %p\n", p->p_pid, *addrp); 275 #endif 276 277 len = gp->g_display.gd_regsize + gp->g_display.gd_fbsize; 278 flags = MAP_SHARED; 279 if (*addrp) 280 flags |= MAP_FIXED; 281 else 282 *addrp = (void *)p->p_emul->e_vm_default_addr(p, 283 (vaddr_t)p->p_vmspace->vm_daddr, len); 284 285 vn.v_type = VCHR; /* XXX */ 286 vn.v_rdev = dev; /* XXX */ 287 error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp, 288 (vsize_t)len, VM_PROT_ALL, VM_PROT_ALL, 289 flags, (void *)&vn, 0, 290 p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur); 291 if (error == 0) 292 (void) (*gp->g_sw->gd_mode)(gp, GM_MAP, *addrp); 293 294 return error; 295 } 296 297 int 298 grfunmap(dev_t dev, void *addr, struct proc *p) 299 { 300 struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev)); 301 vsize_t size; 302 303 #ifdef DEBUG 304 if (grfdebug & GDB_MMAP) { 305 printf("grfunmap(%d): dev %x addr %p\n", 306 p->p_pid, GRFUNIT(dev), addr); 307 } 308 #endif 309 if (addr == 0) 310 return EINVAL; /* XXX: how do we deal with this? */ 311 (void) (*gp->g_sw->gd_mode)(gp, GM_UNMAP, 0); 312 size = round_page(gp->g_display.gd_regsize + gp->g_display.gd_fbsize); 313 uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr, 314 (vaddr_t)addr + size); 315 316 return 0; 317 } 318
Indexes created Thu Sep 25 08:09:54 GMT 2025