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gffb.c revision 1.12
      1 /*	$NetBSD: gffb.c,v 1.12 2017/01/20 12:25:07 maya Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2013 Michael Lorenz
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * A console driver for nvidia geforce graphics controllers
     30  * tested on macppc only so far, should work on other hardware as long as
     31  * something sets up a usable graphics mode and sets the right device properties
     32  * This driver should work with all NV1x hardware but so far it's been tested
     33  * only on NV11 / GeForce2 MX. Needs testing with more hardware and if
     34  * successful, PCI IDs need to be added to gffb_match()
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: gffb.c,v 1.12 2017/01/20 12:25:07 maya Exp $");
     39 
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/kernel.h>
     43 #include <sys/device.h>
     44 #include <sys/malloc.h>
     45 #include <sys/lwp.h>
     46 #include <sys/kauth.h>
     47 #include <sys/atomic.h>
     48 
     49 #include <dev/videomode/videomode.h>
     50 
     51 #include <dev/pci/pcivar.h>
     52 #include <dev/pci/pcireg.h>
     53 #include <dev/pci/pcidevs.h>
     54 #include <dev/pci/pciio.h>
     55 #include <dev/pci/gffbreg.h>
     56 
     57 #include <dev/wscons/wsdisplayvar.h>
     58 #include <dev/wscons/wsconsio.h>
     59 #include <dev/wsfont/wsfont.h>
     60 #include <dev/rasops/rasops.h>
     61 #include <dev/wscons/wsdisplay_vconsvar.h>
     62 #include <dev/pci/wsdisplay_pci.h>
     63 #include <dev/wscons/wsdisplay_glyphcachevar.h>
     64 
     65 #include <dev/i2c/i2cvar.h>
     66 
     67 #include "opt_gffb.h"
     68 #include "opt_vcons.h"
     69 
     70 #ifdef GFFB_DEBUG
     71 #define DPRINTF printf
     72 #else
     73 #define DPRINTF while(0) printf
     74 #endif
     75 
     76 struct gffb_softc {
     77 	device_t sc_dev;
     78 
     79 	pci_chipset_tag_t sc_pc;
     80 	pcitag_t sc_pcitag;
     81 
     82 	bus_space_tag_t sc_memt;
     83 	bus_space_tag_t sc_iot;
     84 
     85 	bus_space_handle_t sc_regh, sc_fbh;
     86 	bus_addr_t sc_fb, sc_reg;
     87 	bus_size_t sc_fbsize, sc_regsize;
     88 	uint8_t *sc_fbaddr;
     89 	size_t sc_vramsize;
     90 
     91 	int sc_width, sc_height, sc_depth, sc_stride;
     92 	int sc_locked;
     93 	struct vcons_screen sc_console_screen;
     94 	struct wsscreen_descr sc_defaultscreen_descr;
     95 	const struct wsscreen_descr *sc_screens[1];
     96 	struct wsscreen_list sc_screenlist;
     97 	struct vcons_data vd;
     98 	int sc_mode;
     99 	u_char sc_cmap_red[256];
    100 	u_char sc_cmap_green[256];
    101 	u_char sc_cmap_blue[256];
    102 	int sc_put, sc_current, sc_free;
    103 	uint32_t sc_rop;
    104 	void (*sc_putchar)(void *, int, int, u_int, long);
    105 	kmutex_t sc_lock;
    106 	glyphcache sc_gc;
    107 };
    108 
    109 static int	gffb_match(device_t, cfdata_t, void *);
    110 static void	gffb_attach(device_t, device_t, void *);
    111 
    112 CFATTACH_DECL_NEW(gffb, sizeof(struct gffb_softc),
    113     gffb_match, gffb_attach, NULL, NULL);
    114 
    115 static int	gffb_ioctl(void *, void *, u_long, void *, int, struct lwp *);
    116 static paddr_t	gffb_mmap(void *, void *, off_t, int);
    117 static void	gffb_init_screen(void *, struct vcons_screen *, int, long *);
    118 
    119 static int	gffb_putcmap(struct gffb_softc *, struct wsdisplay_cmap *);
    120 static int 	gffb_getcmap(struct gffb_softc *, struct wsdisplay_cmap *);
    121 static void	gffb_restore_palette(struct gffb_softc *);
    122 static int 	gffb_putpalreg(struct gffb_softc *, uint8_t, uint8_t,
    123 			    uint8_t, uint8_t);
    124 
    125 static void	gffb_init(struct gffb_softc *);
    126 
    127 static void	gffb_make_room(struct gffb_softc *, int);
    128 static void	gffb_sync(struct gffb_softc *);
    129 
    130 static void	gffb_rectfill(struct gffb_softc *, int, int, int, int,
    131 			    uint32_t);
    132 static void	gffb_bitblt(void *, int, int, int, int, int, int, int);
    133 static void	gffb_rop(struct gffb_softc *, int);
    134 
    135 static void	gffb_cursor(void *, int, int, int);
    136 static void	gffb_putchar(void *, int, int, u_int, long);
    137 static void	gffb_copycols(void *, int, int, int, int);
    138 static void	gffb_erasecols(void *, int, int, int, long);
    139 static void	gffb_copyrows(void *, int, int, int);
    140 static void	gffb_eraserows(void *, int, int, long);
    141 
    142 #define GFFB_READ_4(o) bus_space_read_4(sc->sc_memt, sc->sc_regh, (o))
    143 #define GFFB_WRITE_4(o, v) bus_space_write_4(sc->sc_memt, sc->sc_regh, (o), (v))
    144 
    145 struct wsdisplay_accessops gffb_accessops = {
    146 	gffb_ioctl,
    147 	gffb_mmap,
    148 	NULL,	/* alloc_screen */
    149 	NULL,	/* free_screen */
    150 	NULL,	/* show_screen */
    151 	NULL, 	/* load_font */
    152 	NULL,	/* pollc */
    153 	NULL	/* scroll */
    154 };
    155 
    156 static int
    157 gffb_match(device_t parent, cfdata_t match, void *aux)
    158 {
    159 	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
    160 
    161 	if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY)
    162 		return 0;
    163 	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_NVIDIA)
    164 		return 0;
    165 
    166 	/* only card tested on so far - likely need a list */
    167 	if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NVIDIA_GEFORCE2MX)
    168 		return 100;
    169 	return (0);
    170 }
    171 
    172 static void
    173 gffb_attach(device_t parent, device_t self, void *aux)
    174 {
    175 	struct gffb_softc	*sc = device_private(self);
    176 	struct pci_attach_args	*pa = aux;
    177 	struct rasops_info	*ri;
    178 	bus_space_tag_t		tag;
    179 	struct wsemuldisplaydev_attach_args aa;
    180 	prop_dictionary_t	dict;
    181 	unsigned long		defattr;
    182 	bool			is_console = FALSE;
    183 	int			i, j, f;
    184 	uint8_t			cmap[768];
    185 
    186 	sc->sc_pc = pa->pa_pc;
    187 	sc->sc_pcitag = pa->pa_tag;
    188 	sc->sc_memt = pa->pa_memt;
    189 	sc->sc_iot = pa->pa_iot;
    190 	sc->sc_dev = self;
    191 
    192 	pci_aprint_devinfo(pa, NULL);
    193 
    194 	/* fill in parameters from properties */
    195 	dict = device_properties(self);
    196 	if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width)) {
    197 		aprint_error("%s: no width property\n", device_xname(self));
    198 		return;
    199 	}
    200 	if (!prop_dictionary_get_uint32(dict, "height", &sc->sc_height)) {
    201 		aprint_error("%s: no height property\n", device_xname(self));
    202 		return;
    203 	}
    204 
    205 #ifdef GLYPHCACHE_DEBUG
    206 	/* leave some visible VRAM unused so we can see the glyph cache */
    207 	sc->sc_height -= 300;
    208 #endif
    209 
    210 	if (!prop_dictionary_get_uint32(dict, "depth", &sc->sc_depth)) {
    211 		aprint_error("%s: no depth property\n", device_xname(self));
    212 		return;
    213 	}
    214 	if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_stride)) {
    215 		aprint_error("%s: no linebytes property\n",
    216 		    device_xname(self));
    217 		return;
    218 	}
    219 
    220 	prop_dictionary_get_bool(dict, "is_console", &is_console);
    221 
    222 	if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_MEM, 0,
    223 	    &tag, &sc->sc_regh, &sc->sc_reg, &sc->sc_regsize)) {
    224 		aprint_error("%s: failed to map registers.\n",
    225 		    device_xname(sc->sc_dev));
    226 	}
    227 	sc->sc_vramsize = GFFB_READ_4(GFFB_VRAM) & 0xfff00000;
    228 
    229 	/* don't map more VRAM than we actually have */
    230 	if (pci_mapreg_info(sc->sc_pc, sc->sc_pcitag,
    231 	    0x14, PCI_MAPREG_TYPE_MEM, &sc->sc_fb, &sc->sc_fbsize, &f)) {
    232 		aprint_error("%s: can't find the framebuffer?!\n",
    233 		    device_xname(sc->sc_dev));
    234 	}
    235 
    236 	if (bus_space_map(sc->sc_memt, sc->sc_fb, sc->sc_vramsize,
    237 	    BUS_SPACE_MAP_PREFETCHABLE | BUS_SPACE_MAP_LINEAR,
    238 	    &sc->sc_fbh)) {
    239 		aprint_error("%s: failed to map the framebuffer.\n",
    240 		    device_xname(sc->sc_dev));
    241 	}
    242 	sc->sc_fbaddr = bus_space_vaddr(tag, sc->sc_fbh);
    243 
    244 	aprint_normal("%s: %d MB aperture at 0x%08x\n", device_xname(self),
    245 	    (int)(sc->sc_fbsize >> 20), (uint32_t)sc->sc_fb);
    246 	aprint_normal_dev(sc->sc_dev, "%d MB video memory\n",
    247 	    (int)(sc->sc_vramsize >> 20));
    248 
    249 	sc->sc_defaultscreen_descr = (struct wsscreen_descr){
    250 		"default",
    251 		0, 0,
    252 		NULL,
    253 		8, 16,
    254 		WSSCREEN_WSCOLORS | WSSCREEN_HILIT,
    255 		NULL
    256 	};
    257 	sc->sc_screens[0] = &sc->sc_defaultscreen_descr;
    258 	sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens};
    259 	sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
    260 	sc->sc_locked = 0;
    261 
    262 #ifdef GFFB_DEBUG
    263 	printf("put: %08x\n", GFFB_READ_4(GFFB_FIFO_PUT));
    264 	printf("get: %08x\n", GFFB_READ_4(GFFB_FIFO_GET));
    265 #endif
    266 
    267 	/*
    268 	 * we don't have hardware synchronization so we need a lock to serialize
    269 	 * access to the DMA buffer between normal and kernel output
    270 	 * actually it might be enough to use atomic ops on sc_current, sc_free
    271 	 * etc. but for now we'll play it safe
    272 	 * XXX we will probably deadlock if we take an interrupt while sc_lock
    273 	 * is held and then try to printf()
    274 	 */
    275 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
    276 
    277 	/* init engine here */
    278 	gffb_init(sc);
    279 
    280 	vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr,
    281 	    &gffb_accessops);
    282 	sc->vd.init_screen = gffb_init_screen;
    283 
    284 
    285 	ri = &sc->sc_console_screen.scr_ri;
    286 
    287 	sc->sc_gc.gc_bitblt = gffb_bitblt;
    288 	sc->sc_gc.gc_blitcookie = sc;
    289 	sc->sc_gc.gc_rop = 0xcc;
    290 
    291 	if (is_console) {
    292 		vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
    293 		    &defattr);
    294 		sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
    295 
    296 		gffb_rectfill(sc, 0, 0, sc->sc_width, sc->sc_height,
    297 		    ri->ri_devcmap[(defattr >> 16) & 0xf]);
    298 
    299 		sc->sc_defaultscreen_descr.textops = &ri->ri_ops;
    300 		sc->sc_defaultscreen_descr.capabilities = ri->ri_caps;
    301 		sc->sc_defaultscreen_descr.nrows = ri->ri_rows;
    302 		sc->sc_defaultscreen_descr.ncols = ri->ri_cols;
    303 
    304 		glyphcache_init(&sc->sc_gc, sc->sc_height + 5,
    305 				(0x800000 / sc->sc_stride) - sc->sc_height - 5,
    306 				sc->sc_width,
    307 				ri->ri_font->fontwidth,
    308 				ri->ri_font->fontheight,
    309 				defattr);
    310 
    311 		wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, 0,
    312 		    defattr);
    313 		vcons_replay_msgbuf(&sc->sc_console_screen);
    314 	} else {
    315 		/*
    316 		 * since we're not the console we can postpone the rest
    317 		 * until someone actually allocates a screen for us
    318 		 */
    319 		if (sc->sc_console_screen.scr_ri.ri_rows == 0) {
    320 			/* do some minimal setup to avoid weirdnesses later */
    321 			vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
    322 			    &defattr);
    323 		} else
    324 			(*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);
    325 
    326 		glyphcache_init(&sc->sc_gc, sc->sc_height + 5,
    327 				(0x800000 / sc->sc_stride) - sc->sc_height - 5,
    328 				sc->sc_width,
    329 				ri->ri_font->fontwidth,
    330 				ri->ri_font->fontheight,
    331 				defattr);
    332 	}
    333 
    334 	j = 0;
    335 	rasops_get_cmap(ri, cmap, sizeof(cmap));
    336 	for (i = 0; i < 256; i++) {
    337 		sc->sc_cmap_red[i] = cmap[j];
    338 		sc->sc_cmap_green[i] = cmap[j + 1];
    339 		sc->sc_cmap_blue[i] = cmap[j + 2];
    340 		gffb_putpalreg(sc, i, cmap[j], cmap[j + 1], cmap[j + 2]);
    341 		j += 3;
    342 	}
    343 
    344 	/* no suspend/resume support yet */
    345 	if (!pmf_device_register(sc->sc_dev, NULL, NULL))
    346 		aprint_error_dev(sc->sc_dev,
    347 		    "couldn't establish power handler\n");
    348 
    349 	aa.console = is_console;
    350 	aa.scrdata = &sc->sc_screenlist;
    351 	aa.accessops = &gffb_accessops;
    352 	aa.accesscookie = &sc->vd;
    353 
    354 	config_found(sc->sc_dev, &aa, wsemuldisplaydevprint);
    355 
    356 #ifdef GFFB_DEBUG
    357 	for (i = 0; i < 40; i++) {
    358 		for (j = 0; j < 40; j++) {
    359 			gffb_rectfill(sc, i * 20, j * 20, 20, 20,
    360 			    (i + j ) & 1 ? 0xe0e0e0e0 : 0x03030303);
    361 		}
    362 	}
    363 
    364 	gffb_rectfill(sc, 0, 800, 1280, 224, 0x92929292);
    365 	gffb_bitblt(sc, 0, 10, 10, 810, 200, 20, 0xcc);
    366 	gffb_bitblt(sc, 0, 10, 10, 840, 300, 20, 0xcc);
    367 	gffb_bitblt(sc, 0, 10, 10, 870, 400, 20, 0xcc);
    368 	gffb_bitblt(sc, 0, 10, 10, 900, 500, 20, 0xcc);
    369 	gffb_bitblt(sc, 0, 10, 10, 930, 600, 20, 0xcc);
    370 	gffb_bitblt(sc, 0, 10, 610, 810, 200, 20, 0xcc);
    371 	gffb_bitblt(sc, 0, 10, 610, 840, 300, 20, 0xcc);
    372 	gffb_bitblt(sc, 0, 10, 610, 870, 400, 20, 0xcc);
    373 	gffb_bitblt(sc, 0, 10, 610, 900, 500, 20, 0xcc);
    374 	gffb_bitblt(sc, 0, 10, 610, 930, 600, 20, 0xcc);
    375 	gffb_sync(sc);
    376 	printf("put %x current %x\n", sc->sc_put, sc->sc_current);
    377 #endif
    378 }
    379 
    380 static int
    381 gffb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
    382 {
    383 	struct vcons_data *vd = v;
    384 	struct gffb_softc *sc = vd->cookie;
    385 	struct wsdisplay_fbinfo *wdf;
    386 	struct vcons_screen *ms = vd->active;
    387 
    388 	switch (cmd) {
    389 	case WSDISPLAYIO_GTYPE:
    390 		*(u_int *)data = WSDISPLAY_TYPE_PCIMISC;
    391 		return 0;
    392 
    393 	/* PCI config read/write passthrough. */
    394 	case PCI_IOC_CFGREAD:
    395 	case PCI_IOC_CFGWRITE:
    396 		return pci_devioctl(sc->sc_pc, sc->sc_pcitag,
    397 		    cmd, data, flag, l);
    398 
    399 	case WSDISPLAYIO_GET_BUSID:
    400 		return wsdisplayio_busid_pci(sc->sc_dev, sc->sc_pc,
    401 		    sc->sc_pcitag, data);
    402 
    403 	case WSDISPLAYIO_GINFO:
    404 		if (ms == NULL)
    405 			return ENODEV;
    406 		wdf = (void *)data;
    407 		wdf->height = ms->scr_ri.ri_height;
    408 		wdf->width = ms->scr_ri.ri_width;
    409 		wdf->depth = ms->scr_ri.ri_depth;
    410 		wdf->cmsize = 256;
    411 		return 0;
    412 
    413 	case WSDISPLAYIO_GETCMAP:
    414 		return gffb_getcmap(sc,
    415 		    (struct wsdisplay_cmap *)data);
    416 
    417 	case WSDISPLAYIO_PUTCMAP:
    418 		return gffb_putcmap(sc,
    419 		    (struct wsdisplay_cmap *)data);
    420 
    421 	case WSDISPLAYIO_LINEBYTES:
    422 		*(u_int *)data = sc->sc_stride;
    423 		return 0;
    424 
    425 	case WSDISPLAYIO_SMODE: {
    426 		int new_mode = *(int*)data;
    427 		if (new_mode != sc->sc_mode) {
    428 			sc->sc_mode = new_mode;
    429 			if(new_mode == WSDISPLAYIO_MODE_EMUL) {
    430 				gffb_init(sc);
    431 				gffb_restore_palette(sc);
    432 				glyphcache_wipe(&sc->sc_gc);
    433 				gffb_rectfill(sc, 0, 0, sc->sc_width,
    434 				    sc->sc_height, ms->scr_ri.ri_devcmap[
    435 				    (ms->scr_defattr >> 16) & 0xf]);
    436 				vcons_redraw_screen(ms);
    437 			}
    438 		}
    439 		}
    440 		return 0;
    441 
    442 	case WSDISPLAYIO_GET_EDID: {
    443 		struct wsdisplayio_edid_info *d = data;
    444 		return wsdisplayio_get_edid(sc->sc_dev, d);
    445 	}
    446 
    447 	case WSDISPLAYIO_GET_FBINFO: {
    448 		struct wsdisplayio_fbinfo *fbi = data;
    449 		return wsdisplayio_get_fbinfo(&ms->scr_ri, fbi);
    450 	}
    451 	}
    452 	return EPASSTHROUGH;
    453 }
    454 
    455 static paddr_t
    456 gffb_mmap(void *v, void *vs, off_t offset, int prot)
    457 {
    458 	struct vcons_data *vd = v;
    459 	struct gffb_softc *sc = vd->cookie;
    460 	paddr_t pa;
    461 
    462 	/* 'regular' framebuffer mmap()ing */
    463 	if (offset < sc->sc_vramsize) {
    464 		pa = bus_space_mmap(sc->sc_memt, sc->sc_fb + offset + 0x2000,
    465 		    0, prot, BUS_SPACE_MAP_LINEAR);
    466 		return pa;
    467 	}
    468 
    469 	/*
    470 	 * restrict all other mappings to processes with superuser privileges
    471 	 * or the kernel itself
    472 	 */
    473 	if (kauth_authorize_machdep(kauth_cred_get(),
    474 	    KAUTH_MACHDEP_UNMANAGEDMEM,
    475 	    NULL, NULL, NULL, NULL) != 0) {
    476 		aprint_normal("%s: mmap() rejected.\n",
    477 		    device_xname(sc->sc_dev));
    478 		return -1;
    479 	}
    480 
    481 	if ((offset >= sc->sc_fb) && (offset < (sc->sc_fb + sc->sc_fbsize))) {
    482 		pa = bus_space_mmap(sc->sc_memt, offset, 0, prot,
    483 		    BUS_SPACE_MAP_LINEAR);
    484 		return pa;
    485 	}
    486 
    487 	if ((offset >= sc->sc_reg) &&
    488 	    (offset < (sc->sc_reg + sc->sc_regsize))) {
    489 		pa = bus_space_mmap(sc->sc_memt, offset, 0, prot,
    490 		    BUS_SPACE_MAP_LINEAR);
    491 		return pa;
    492 	}
    493 
    494 #ifdef PCI_MAGIC_IO_RANGE
    495 	/* allow mapping of IO space */
    496 	if ((offset >= PCI_MAGIC_IO_RANGE) &&
    497 	    (offset < PCI_MAGIC_IO_RANGE + 0x10000)) {
    498 		pa = bus_space_mmap(sc->sc_iot, offset - PCI_MAGIC_IO_RANGE,
    499 		    0, prot, BUS_SPACE_MAP_LINEAR);
    500 		return pa;
    501 	}
    502 #endif
    503 
    504 	return -1;
    505 }
    506 
    507 static void
    508 gffb_init_screen(void *cookie, struct vcons_screen *scr,
    509     int existing, long *defattr)
    510 {
    511 	struct gffb_softc *sc = cookie;
    512 	struct rasops_info *ri = &scr->scr_ri;
    513 
    514 	ri->ri_depth = sc->sc_depth;
    515 	ri->ri_width = sc->sc_width;
    516 	ri->ri_height = sc->sc_height;
    517 	ri->ri_stride = sc->sc_stride;
    518 	ri->ri_bits = sc->sc_fbaddr + 0x2000;
    519 	ri->ri_flg = RI_CENTER;
    520 	if (sc->sc_depth == 8)
    521 		ri->ri_flg |= RI_8BIT_IS_RGB | RI_ENABLE_ALPHA;
    522 
    523 	rasops_init(ri, 0, 0);
    524 	ri->ri_caps = WSSCREEN_WSCOLORS;
    525 
    526 	rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
    527 		    sc->sc_width / ri->ri_font->fontwidth);
    528 
    529 	ri->ri_hw = scr;
    530 
    531 	sc->sc_putchar = ri->ri_ops.putchar;
    532 	ri->ri_ops.copyrows = gffb_copyrows;
    533 	ri->ri_ops.copycols = gffb_copycols;
    534 	ri->ri_ops.eraserows = gffb_eraserows;
    535 	ri->ri_ops.erasecols = gffb_erasecols;
    536 	ri->ri_ops.cursor = gffb_cursor;
    537 	ri->ri_ops.putchar = gffb_putchar;
    538 }
    539 
    540 static int
    541 gffb_putcmap(struct gffb_softc *sc, struct wsdisplay_cmap *cm)
    542 {
    543 	u_char *r, *g, *b;
    544 	u_int index = cm->index;
    545 	u_int count = cm->count;
    546 	int i, error;
    547 	u_char rbuf[256], gbuf[256], bbuf[256];
    548 
    549 #ifdef GFFB_DEBUG
    550 	aprint_debug("putcmap: %d %d\n",index, count);
    551 #endif
    552 	if (cm->index >= 256 || cm->count > 256 ||
    553 	    (cm->index + cm->count) > 256)
    554 		return EINVAL;
    555 	error = copyin(cm->red, &rbuf[index], count);
    556 	if (error)
    557 		return error;
    558 	error = copyin(cm->green, &gbuf[index], count);
    559 	if (error)
    560 		return error;
    561 	error = copyin(cm->blue, &bbuf[index], count);
    562 	if (error)
    563 		return error;
    564 
    565 	memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
    566 	memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
    567 	memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);
    568 
    569 	r = &sc->sc_cmap_red[index];
    570 	g = &sc->sc_cmap_green[index];
    571 	b = &sc->sc_cmap_blue[index];
    572 
    573 	for (i = 0; i < count; i++) {
    574 		gffb_putpalreg(sc, index, *r, *g, *b);
    575 		index++;
    576 		r++, g++, b++;
    577 	}
    578 	return 0;
    579 }
    580 
    581 static int
    582 gffb_getcmap(struct gffb_softc *sc, struct wsdisplay_cmap *cm)
    583 {
    584 	u_int index = cm->index;
    585 	u_int count = cm->count;
    586 	int error;
    587 
    588 	if (index >= 255 || count > 256 || index + count > 256)
    589 		return EINVAL;
    590 
    591 	error = copyout(&sc->sc_cmap_red[index],   cm->red,   count);
    592 	if (error)
    593 		return error;
    594 	error = copyout(&sc->sc_cmap_green[index], cm->green, count);
    595 	if (error)
    596 		return error;
    597 	error = copyout(&sc->sc_cmap_blue[index],  cm->blue,  count);
    598 	if (error)
    599 		return error;
    600 
    601 	return 0;
    602 }
    603 
    604 static void
    605 gffb_restore_palette(struct gffb_softc *sc)
    606 {
    607 	int i;
    608 
    609 	for (i = 0; i < (1 << sc->sc_depth); i++) {
    610 		gffb_putpalreg(sc, i, sc->sc_cmap_red[i],
    611 		    sc->sc_cmap_green[i], sc->sc_cmap_blue[i]);
    612 	}
    613 }
    614 
    615 static int
    616 gffb_putpalreg(struct gffb_softc *sc, uint8_t idx, uint8_t r, uint8_t g,
    617     uint8_t b)
    618 {
    619 	/* port 0 */
    620 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    621 	    GFFB_PDIO0 + GFFB_PEL_IW, idx);
    622 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    623 	    GFFB_PDIO0 + GFFB_PEL_D, r);
    624 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    625 	    GFFB_PDIO0 + GFFB_PEL_D, g);
    626 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    627 	    GFFB_PDIO0 + GFFB_PEL_D, b);
    628 
    629 	/* port 1 */
    630 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    631 	    GFFB_PDIO1 + GFFB_PEL_IW, idx);
    632 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    633 	    GFFB_PDIO1 + GFFB_PEL_D, r);
    634 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    635 	    GFFB_PDIO1 + GFFB_PEL_D, g);
    636 	bus_space_write_1(sc->sc_memt, sc->sc_regh,
    637 	    GFFB_PDIO1 + GFFB_PEL_D, b);
    638 
    639 	return 0;
    640 }
    641 
    642 
    643 static void
    644 gffb_dma_kickoff(struct gffb_softc *sc)
    645 {
    646 
    647 	if (sc->sc_current != sc->sc_put) {
    648 		sc->sc_put = sc->sc_current;
    649 		membar_sync();
    650 		(void)*sc->sc_fbaddr;
    651 		GFFB_WRITE_4(GFFB_FIFO_PUT, sc->sc_put);
    652 		membar_sync();
    653 	}
    654 }
    655 
    656 static void
    657 gffb_dmanext(struct gffb_softc *sc, uint32_t data)
    658 {
    659 	bus_space_write_stream_4(sc->sc_memt, sc->sc_fbh, sc->sc_current, data);
    660 	sc->sc_current += 4;
    661 }
    662 
    663 static void
    664 gffb_dmastart(struct gffb_softc *sc, uint32_t tag, int size)
    665 {
    666 	if(sc->sc_free <= (size << 2))
    667 		gffb_make_room(sc, size);
    668 	gffb_dmanext(sc, ((size) << 18) | (tag));
    669 	sc->sc_free -= ((size + 1) << 2);
    670 }
    671 
    672 /*
    673  * from xf86_video_nv/nv_xaa.c:
    674  * There is a HW race condition with videoram command buffers.
    675  * You can't jump to the location of your put offset.  We write put
    676  * at the jump offset + SKIPS dwords with noop padding in between
    677  * to solve this problem
    678  */
    679 
    680 #define SKIPS  8
    681 
    682 static void
    683 gffb_make_room(struct gffb_softc *sc, int size)
    684 {
    685 	uint32_t get;
    686 
    687 	size = (size + 1) << 2;	/* slots -> offset */
    688 
    689 	while (sc->sc_free < size) {
    690 		get = GFFB_READ_4(GFFB_FIFO_GET);
    691 
    692 		if (sc->sc_put >= get) {
    693 			sc->sc_free = 0x2000 - sc->sc_current;
    694 			if (sc->sc_free < size) {
    695 				gffb_dmanext(sc, 0x20000000);
    696 				if(get <= (SKIPS << 2)) {
    697 					if (sc->sc_put <= (SKIPS << 2)) {
    698 						/* corner case - will be idle */
    699 						GFFB_WRITE_4(GFFB_FIFO_PUT,
    700 						    (SKIPS + 1) << 2);
    701 					}
    702 					do {
    703 						get =GFFB_READ_4(GFFB_FIFO_GET);
    704 					} while (get <= (SKIPS << 2));
    705 				}
    706 				GFFB_WRITE_4(GFFB_FIFO_PUT, SKIPS << 2);
    707 				sc->sc_current = sc->sc_put = (SKIPS << 2);
    708 				sc->sc_free = get - ((SKIPS + 1) << 2);
    709 			}
    710 		} else
    711 			sc->sc_free = get - sc->sc_current - 4;
    712 	}
    713 }
    714 
    715 static void
    716 gffb_sync(struct gffb_softc *sc)
    717 {
    718 	int bail;
    719 	int i;
    720 
    721 	/*
    722 	 * if there are commands in the buffer make sure the chip is actually
    723 	 * trying to run them
    724 	 */
    725 	gffb_dma_kickoff(sc);
    726 
    727 	/* now wait for the command buffer to drain... */
    728 	bail = 100000000;
    729 	while ((GFFB_READ_4(GFFB_FIFO_GET) != sc->sc_put) && (bail > 0)) {
    730 		bail--;
    731 	}
    732 	if (bail == 0) goto crap;
    733 
    734 	/* ... and for the engine to go idle */
    735 	bail = 100000000;
    736 	while((GFFB_READ_4(GFFB_BUSY) != 0) && (bail > 0)) {
    737 		bail--;
    738 	}
    739 	if (bail == 0) goto crap;
    740 	return;
    741 crap:
    742 	/* if we time out fill the buffer with NOPs and cross fingers */
    743 	sc->sc_put = 0;
    744 	sc->sc_current = 0;
    745 	for (i = 0; i < 0x2000; i += 4)
    746 		bus_space_write_stream_4(sc->sc_memt, sc->sc_fbh, i, 0);
    747 	aprint_error_dev(sc->sc_dev, "DMA lockup\n");
    748 }
    749 
    750 static void
    751 gffb_init(struct gffb_softc *sc)
    752 {
    753 	int i;
    754 	uint32_t foo;
    755 
    756 	/* init display start */
    757 	GFFB_WRITE_4(GFFB_CRTC0 + GFFB_DISPLAYSTART, 0x2000);
    758 	GFFB_WRITE_4(GFFB_CRTC1 + GFFB_DISPLAYSTART, 0x2000);
    759 	GFFB_WRITE_4(GFFB_PDIO0 + GFFB_PEL_MASK, 0xff);
    760 	GFFB_WRITE_4(GFFB_PDIO1 + GFFB_PEL_MASK, 0xff);
    761 
    762 	/* DMA stuff. A whole lot of magic number voodoo from xf86-video-nv */
    763 	GFFB_WRITE_4(GFFB_PMC + 0x140, 0);
    764 	GFFB_WRITE_4(GFFB_PMC + 0x200, 0xffff00ff);
    765 	GFFB_WRITE_4(GFFB_PMC + 0x200, 0xffffffff);
    766 	GFFB_WRITE_4(GFFB_PTIMER + 0x800, 8);
    767 	GFFB_WRITE_4(GFFB_PTIMER + 0x840, 3);
    768 	GFFB_WRITE_4(GFFB_PTIMER + 0x500, 0);
    769 	GFFB_WRITE_4(GFFB_PTIMER + 0x400, 0xffffffff);
    770 	for (i = 0; i < 8; i++) {
    771 		GFFB_WRITE_4(GFFB_PMC + 0x240 + (i * 0x10), 0);
    772 		GFFB_WRITE_4(GFFB_PMC + 0x244 + (i * 0x10),
    773 		    sc->sc_vramsize - 1);
    774 	}
    775 
    776 	for (i = 0; i < 8; i++) {
    777 		GFFB_WRITE_4(GFFB_PFB + 0x0240 + (i * 0x10), 0);
    778 		GFFB_WRITE_4(GFFB_PFB + 0x0244 + (i * 0x10),
    779 		    sc->sc_vramsize - 1);
    780 	}
    781 
    782 	GFFB_WRITE_4(GFFB_PRAMIN, 0x80000010);
    783 	GFFB_WRITE_4(GFFB_PRAMIN + 0x04, 0x80011201);
    784 	GFFB_WRITE_4(GFFB_PRAMIN + 0x08, 0x80000011);
    785 	GFFB_WRITE_4(GFFB_PRAMIN + 0x0c, 0x80011202);
    786 	GFFB_WRITE_4(GFFB_PRAMIN + 0x10, 0x80000012);
    787 	GFFB_WRITE_4(GFFB_PRAMIN + 0x14, 0x80011203);
    788 	GFFB_WRITE_4(GFFB_PRAMIN + 0x18, 0x80000013);
    789 	GFFB_WRITE_4(GFFB_PRAMIN + 0x1c, 0x80011204);
    790 	GFFB_WRITE_4(GFFB_PRAMIN + 0x20, 0x80000014);
    791 	GFFB_WRITE_4(GFFB_PRAMIN + 0x24, 0x80011205);
    792 	GFFB_WRITE_4(GFFB_PRAMIN + 0x28, 0x80000015);
    793 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2c, 0x80011206);
    794 	GFFB_WRITE_4(GFFB_PRAMIN + 0x30, 0x80000016);
    795 	GFFB_WRITE_4(GFFB_PRAMIN + 0x34, 0x80011207);
    796 	GFFB_WRITE_4(GFFB_PRAMIN + 0x38, 0x80000017);
    797 	GFFB_WRITE_4(GFFB_PRAMIN + 0x3c, 0x80011208);
    798 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2000, 0x00003000);
    799 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2004, sc->sc_vramsize - 1);
    800 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2008, 0x00000002);
    801 	GFFB_WRITE_4(GFFB_PRAMIN + 0x200c, 0x00000002);
    802 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2010, 0x01008042);	/* different for nv40 */
    803 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2014, 0);
    804 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2018, 0x12001200);
    805 	GFFB_WRITE_4(GFFB_PRAMIN + 0x201c, 0);
    806 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2020, 0x01008043);
    807 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2024, 0);
    808 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2028, 0);
    809 	GFFB_WRITE_4(GFFB_PRAMIN + 0x202c, 0);
    810 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2030, 0x01008044);
    811 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2034, 0x00000002);
    812 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2038, 0);
    813 	GFFB_WRITE_4(GFFB_PRAMIN + 0x203c, 0);
    814 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2040, 0x01008019);
    815 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2044, 0);
    816 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2048, 0);
    817 	GFFB_WRITE_4(GFFB_PRAMIN + 0x204c, 0);
    818 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2050, 0x0100a05c);
    819 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2054, 0);
    820 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2058, 0);
    821 	GFFB_WRITE_4(GFFB_PRAMIN + 0x205c, 0);
    822 	/* XXX 0x0100805f if !WaitVSynvPossible */
    823 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2060, 0x0100809f);
    824 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2064, 0);
    825 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2068, 0x12001200);
    826 	GFFB_WRITE_4(GFFB_PRAMIN + 0x206c, 0);
    827 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2070, 0x0100804a);
    828 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2074, 0x00000002);
    829 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2078, 0);
    830 	GFFB_WRITE_4(GFFB_PRAMIN + 0x207c, 0);
    831 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2080, 0x01018077);
    832 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2084, 0);
    833 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2088, 0x12001200);
    834 	GFFB_WRITE_4(GFFB_PRAMIN + 0x208c, 0);
    835 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2090, 0x00003002);
    836 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2094, 0x00007fff);
    837 	/* command buffer start with some flag in the lower bits */
    838 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2098, 0x00000002);
    839 	GFFB_WRITE_4(GFFB_PRAMIN + 0x209c, 0x00000002);
    840 #if BYTE_ORDER == BIG_ENDIAN
    841 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2010, 0x01088042);
    842 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2020, 0x01088043);
    843 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2030, 0x01088044);
    844 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2040, 0x01088019);
    845 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2050, 0x0108a05c);
    846 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2060, 0x0108809f);
    847 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2070, 0x0108804a);
    848 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2080, 0x01098077);
    849 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2034, 0x00000001);
    850 	GFFB_WRITE_4(GFFB_PRAMIN + 0x2074, 0x00000001);
    851 #endif
    852 
    853 	/* PGRAPH setup */
    854 	GFFB_WRITE_4(GFFB_PFIFO + 0x0500, 0);
    855 	GFFB_WRITE_4(GFFB_PFIFO + 0x0504, 0x00000001);
    856 	GFFB_WRITE_4(GFFB_PFIFO + 0x1200, 0);
    857 	GFFB_WRITE_4(GFFB_PFIFO + 0x1250, 0);
    858 	GFFB_WRITE_4(GFFB_PFIFO + 0x1204, 0x00000100);	/* different on nv40 */
    859 	GFFB_WRITE_4(GFFB_PFIFO + 0x1240, 0);
    860 	GFFB_WRITE_4(GFFB_PFIFO + 0x1244, 0);
    861 	GFFB_WRITE_4(GFFB_PFIFO + 0x122c, 0x00001209);	/* different on nv40 */
    862 	GFFB_WRITE_4(GFFB_PFIFO + 0x1000, 0);
    863 	GFFB_WRITE_4(GFFB_PFIFO + 0x1050, 0);
    864 	GFFB_WRITE_4(GFFB_PFIFO + 0x0210, 0x03000100);
    865 	GFFB_WRITE_4(GFFB_PFIFO + 0x0214, 0x00000110);
    866 	GFFB_WRITE_4(GFFB_PFIFO + 0x0218, 0x00000112);
    867 	GFFB_WRITE_4(GFFB_PFIFO + 0x050c, 0x0000ffff);
    868 	GFFB_WRITE_4(GFFB_PFIFO + 0x1258, 0x0000ffff);
    869 	GFFB_WRITE_4(GFFB_PFIFO + 0x0140, 0);
    870 	GFFB_WRITE_4(GFFB_PFIFO + 0x0100, 0xffffffff);
    871 	GFFB_WRITE_4(GFFB_PFIFO + 0x1054, 0x00000001);
    872 	GFFB_WRITE_4(GFFB_PFIFO + 0x1230, 0);
    873 	GFFB_WRITE_4(GFFB_PFIFO + 0x1280, 0);
    874 #if BYTE_ORDER == BIG_ENDIAN
    875 	GFFB_WRITE_4(GFFB_PFIFO + 0x1224, 0x800f0078);
    876 #else
    877 	GFFB_WRITE_4(GFFB_PFIFO + 0x1224, 0x000f0078);
    878 #endif
    879 	GFFB_WRITE_4(GFFB_PFIFO + 0x1220, 0x00000001);
    880 	GFFB_WRITE_4(GFFB_PFIFO + 0x1200, 0x00000001);
    881 	GFFB_WRITE_4(GFFB_PFIFO + 0x1250, 0x00000001);
    882 	GFFB_WRITE_4(GFFB_PFIFO + 0x1254, 0x00000001);
    883 	GFFB_WRITE_4(GFFB_PFIFO + 0x0500, 0x00000001);
    884 
    885 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0080, 0xFFFFFFFF);
    886 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0080, 0x00000000);
    887 
    888 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0140, 0x00000000);
    889 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0100, 0xFFFFFFFF);
    890 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0144, 0x10010100);
    891 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0714, 0xFFFFFFFF);
    892 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0720, 0x00000001);
    893 	/*
    894 	 * xf86_video_nv does this in two writes,
    895 	 * not sure if they can be combined
    896 	 */
    897 	foo = GFFB_READ_4(GFFB_PGRAPH + 0x0710);
    898 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0710, foo & 0x0007ff00);
    899 	foo = GFFB_READ_4(GFFB_PGRAPH + 0x0710);
    900 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0710, foo | 0x00020100);
    901 
    902 	/* NV_ARCH_10 */
    903 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0084, 0x00118700);
    904 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0088, 0x24E00810);
    905 	GFFB_WRITE_4(GFFB_PGRAPH + 0x008C, 0x55DE0030);
    906 
    907 	for(i = 0; i < 128; i += 4) {
    908 		GFFB_WRITE_4(GFFB_PGRAPH + 0x0B00 + i,
    909 		    GFFB_READ_4(GFFB_PFB + 0x0240 + i));
    910 	}
    911 
    912 	GFFB_WRITE_4(GFFB_PGRAPH + 0x640, 0);
    913 	GFFB_WRITE_4(GFFB_PGRAPH + 0x644, 0);
    914 	GFFB_WRITE_4(GFFB_PGRAPH + 0x684, sc->sc_vramsize - 1);
    915 	GFFB_WRITE_4(GFFB_PGRAPH + 0x688, sc->sc_vramsize - 1);
    916 
    917 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0810, 0x00000000);
    918 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0608, 0xFFFFFFFF);
    919 
    920 	GFFB_WRITE_4(GFFB_PGRAPH + 0x053C, 0);
    921 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0540, 0);
    922 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0544, 0x00007FFF);
    923 	GFFB_WRITE_4(GFFB_PGRAPH + 0x0548, 0x00007FFF);
    924 
    925 	GFFB_WRITE_4(GFFB_CMDSTART, 0x00000002);
    926 	GFFB_WRITE_4(GFFB_FIFO_GET, 0);
    927 	sc->sc_put = 0;
    928 	sc->sc_current = 0;
    929 	sc->sc_free = 0x2000;
    930 
    931 	for(i = 0; i < SKIPS; i++)
    932 		gffb_dmanext(sc, 0);
    933 
    934 	gffb_dmanext(sc, 0x00040000);
    935 	gffb_dmanext(sc, 0x80000010);
    936 	gffb_dmanext(sc, 0x00042000);
    937 	gffb_dmanext(sc, 0x80000011);
    938 	gffb_dmanext(sc, 0x00044000);
    939 	gffb_dmanext(sc, 0x80000012);
    940 	gffb_dmanext(sc, 0x00046000);
    941 	gffb_dmanext(sc, 0x80000013);
    942 	gffb_dmanext(sc, 0x00048000);
    943 	gffb_dmanext(sc, 0x80000014);
    944 	gffb_dmanext(sc, 0x0004A000);
    945 	gffb_dmanext(sc, 0x80000015);
    946 	gffb_dmanext(sc, 0x0004C000);
    947 	gffb_dmanext(sc, 0x80000016);
    948 	gffb_dmanext(sc, 0x0004E000);
    949 	gffb_dmanext(sc, 0x80000017);
    950 	sc->sc_free = 0x2000 - sc->sc_current;
    951 
    952 	gffb_dmastart(sc, SURFACE_FORMAT, 4);
    953 	gffb_dmanext(sc, SURFACE_FORMAT_DEPTH8);
    954 	gffb_dmanext(sc, sc->sc_stride | (sc->sc_stride << 16));
    955 	gffb_dmanext(sc, 0x2000);	/* src offset */
    956 	gffb_dmanext(sc, 0x2000);	/* dst offset */
    957 
    958 	gffb_dmastart(sc, RECT_FORMAT, 1);
    959 	gffb_dmanext(sc, RECT_FORMAT_DEPTH8);
    960 
    961 	gffb_dmastart(sc, PATTERN_FORMAT, 1);
    962 	gffb_dmanext(sc, PATTERN_FORMAT_DEPTH8);
    963 
    964 	gffb_dmastart(sc, PATTERN_COLOR_0, 4);
    965 	gffb_dmanext(sc, 0xffffffff);
    966 	gffb_dmanext(sc, 0xffffffff);
    967 	gffb_dmanext(sc, 0xffffffff);
    968 	gffb_dmanext(sc, 0xffffffff);
    969 
    970 	gffb_dmastart(sc, ROP_SET, 1);
    971 	gffb_dmanext(sc, 0xcc);
    972 	sc->sc_rop = 0xcc;
    973 
    974 	gffb_dma_kickoff(sc);
    975 	gffb_sync(sc);
    976 	DPRINTF("put %x current %x\n", sc->sc_put, sc->sc_current);
    977 
    978 }
    979 
    980 static void
    981 gffb_rop(struct gffb_softc *sc, int rop)
    982 {
    983 	if (rop == sc->sc_rop)
    984 		return;
    985 	sc->sc_rop = rop;
    986 	gffb_dmastart(sc, ROP_SET, 1);
    987 	gffb_dmanext(sc, rop);
    988 }
    989 
    990 static void
    991 gffb_rectfill(struct gffb_softc *sc, int x, int y, int wi, int he,
    992      uint32_t colour)
    993 {
    994 	mutex_enter(&sc->sc_lock);
    995 	gffb_rop(sc, 0xcc);
    996 
    997 	gffb_dmastart(sc, RECT_SOLID_COLOR, 1);
    998 	gffb_dmanext(sc, colour);
    999 
   1000 	gffb_dmastart(sc, RECT_SOLID_RECTS(0), 2);
   1001 	gffb_dmanext(sc, (x << 16) | y);
   1002 	gffb_dmanext(sc, (wi << 16) | he);
   1003 	gffb_dma_kickoff(sc);
   1004 	mutex_exit(&sc->sc_lock);
   1005 }
   1006 
   1007 static void
   1008 gffb_bitblt(void *cookie, int xs, int ys, int xd, int yd,
   1009     int wi, int he, int rop)
   1010 {
   1011 	struct gffb_softc *sc = cookie;
   1012 
   1013 	mutex_enter(&sc->sc_lock);
   1014 
   1015 	gffb_rop(sc, rop);
   1016 
   1017 	gffb_dmastart(sc, BLIT_POINT_SRC, 3);
   1018 	gffb_dmanext(sc, (ys << 16) | xs);
   1019 	gffb_dmanext(sc, (yd << 16) | xd);
   1020 	gffb_dmanext(sc, (he << 16) | wi);
   1021 	gffb_dma_kickoff(sc);
   1022 	mutex_exit(&sc->sc_lock);
   1023 }
   1024 
   1025 static void
   1026 gffb_cursor(void *cookie, int on, int row, int col)
   1027 {
   1028 	struct rasops_info *ri = cookie;
   1029 	struct vcons_screen *scr = ri->ri_hw;
   1030 	struct gffb_softc *sc = scr->scr_cookie;
   1031 	int x, y, wi, he;
   1032 
   1033 	wi = ri->ri_font->fontwidth;
   1034 	he = ri->ri_font->fontheight;
   1035 
   1036 	if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
   1037 		x = ri->ri_ccol * wi + ri->ri_xorigin;
   1038 		y = ri->ri_crow * he + ri->ri_yorigin;
   1039 		if (ri->ri_flg & RI_CURSOR) {
   1040 			gffb_bitblt(sc, x, y, x, y, wi, he, 0x33);
   1041 			ri->ri_flg &= ~RI_CURSOR;
   1042 		}
   1043 		ri->ri_crow = row;
   1044 		ri->ri_ccol = col;
   1045 		if (on) {
   1046 			x = ri->ri_ccol * wi + ri->ri_xorigin;
   1047 			y = ri->ri_crow * he + ri->ri_yorigin;
   1048 			gffb_bitblt(sc, x, y, x, y, wi, he, 0x33);
   1049 			ri->ri_flg |= RI_CURSOR;
   1050 		}
   1051 	} else {
   1052 		scr->scr_ri.ri_crow = row;
   1053 		scr->scr_ri.ri_ccol = col;
   1054 		scr->scr_ri.ri_flg &= ~RI_CURSOR;
   1055 	}
   1056 
   1057 }
   1058 
   1059 static void
   1060 gffb_putchar(void *cookie, int row, int col, u_int c, long attr)
   1061 {
   1062 	struct rasops_info *ri = cookie;
   1063 	struct wsdisplay_font *font = PICK_FONT(ri, c);
   1064 	struct vcons_screen *scr = ri->ri_hw;
   1065 	struct gffb_softc *sc = scr->scr_cookie;
   1066 	int x, y, wi, he, rv = GC_NOPE;
   1067 	uint32_t bg;
   1068 
   1069 	if (sc->sc_mode != WSDISPLAYIO_MODE_EMUL)
   1070 		return;
   1071 
   1072 	if (!CHAR_IN_FONT(c, font))
   1073 		return;
   1074 
   1075 	wi = font->fontwidth;
   1076 	he = font->fontheight;
   1077 
   1078 	x = ri->ri_xorigin + col * wi;
   1079 	y = ri->ri_yorigin + row * he;
   1080 	bg = ri->ri_devcmap[(attr >> 16) & 0xf];
   1081 
   1082 	if (c == 0x20) {
   1083 		gffb_rectfill(sc, x, y, wi, he, bg);
   1084 		return;
   1085 	}
   1086 	rv = glyphcache_try(&sc->sc_gc, c, x, y, attr);
   1087 	if (rv == GC_OK)
   1088 		return;
   1089 
   1090 	mutex_enter(&sc->sc_lock);
   1091 	gffb_sync(sc);
   1092 	sc->sc_putchar(cookie, row, col, c, attr);
   1093 	membar_sync();
   1094 	mutex_exit(&sc->sc_lock);
   1095 
   1096 	if (rv == GC_ADD) {
   1097 		glyphcache_add(&sc->sc_gc, c, x, y);
   1098 	}
   1099 }
   1100 
   1101 static void
   1102 gffb_copycols(void *cookie, int row, int srccol, int dstcol, int ncols)
   1103 {
   1104 	struct rasops_info *ri = cookie;
   1105 	struct vcons_screen *scr = ri->ri_hw;
   1106 	struct gffb_softc *sc = scr->scr_cookie;
   1107 	int32_t xs, xd, y, width, height;
   1108 
   1109 	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
   1110 		xs = ri->ri_xorigin + ri->ri_font->fontwidth * srccol;
   1111 		xd = ri->ri_xorigin + ri->ri_font->fontwidth * dstcol;
   1112 		y = ri->ri_yorigin + ri->ri_font->fontheight * row;
   1113 		width = ri->ri_font->fontwidth * ncols;
   1114 		height = ri->ri_font->fontheight;
   1115 		gffb_bitblt(sc, xs, y, xd, y, width, height, 0xcc);
   1116 	}
   1117 }
   1118 
   1119 static void
   1120 gffb_erasecols(void *cookie, int row, int startcol, int ncols, long fillattr)
   1121 {
   1122 	struct rasops_info *ri = cookie;
   1123 	struct vcons_screen *scr = ri->ri_hw;
   1124 	struct gffb_softc *sc = scr->scr_cookie;
   1125 	int32_t x, y, width, height, fg, bg, ul;
   1126 
   1127 	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
   1128 		x = ri->ri_xorigin + ri->ri_font->fontwidth * startcol;
   1129 		y = ri->ri_yorigin + ri->ri_font->fontheight * row;
   1130 		width = ri->ri_font->fontwidth * ncols;
   1131 		height = ri->ri_font->fontheight;
   1132 		rasops_unpack_attr(fillattr, &fg, &bg, &ul);
   1133 
   1134 		gffb_rectfill(sc, x, y, width, height, ri->ri_devcmap[bg]);
   1135 	}
   1136 }
   1137 
   1138 static void
   1139 gffb_copyrows(void *cookie, int srcrow, int dstrow, int nrows)
   1140 {
   1141 	struct rasops_info *ri = cookie;
   1142 	struct vcons_screen *scr = ri->ri_hw;
   1143 	struct gffb_softc *sc = scr->scr_cookie;
   1144 	int32_t x, ys, yd, width, height;
   1145 
   1146 	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
   1147 		x = ri->ri_xorigin;
   1148 		ys = ri->ri_yorigin + ri->ri_font->fontheight * srcrow;
   1149 		yd = ri->ri_yorigin + ri->ri_font->fontheight * dstrow;
   1150 		width = ri->ri_emuwidth;
   1151 		height = ri->ri_font->fontheight * nrows;
   1152 		gffb_bitblt(sc, x, ys, x, yd, width, height, 0xcc);
   1153 	}
   1154 }
   1155 
   1156 static void
   1157 gffb_eraserows(void *cookie, int row, int nrows, long fillattr)
   1158 {
   1159 	struct rasops_info *ri = cookie;
   1160 	struct vcons_screen *scr = ri->ri_hw;
   1161 	struct gffb_softc *sc = scr->scr_cookie;
   1162 	int32_t x, y, width, height, fg, bg, ul;
   1163 
   1164 	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
   1165 		x = ri->ri_xorigin;
   1166 		y = ri->ri_yorigin + ri->ri_font->fontheight * row;
   1167 		width = ri->ri_emuwidth;
   1168 		height = ri->ri_font->fontheight * nrows;
   1169 		rasops_unpack_attr(fillattr, &fg, &bg, &ul);
   1170 
   1171 		gffb_rectfill(sc, x, y, width, height, ri->ri_devcmap[bg]);
   1172 	}
   1173 }
   1174