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apbus.c revision 1.21.34.1 
      1 /*	$NetBSD: apbus.c,v 1.21.34.1 2011/03/05 15:09:55 bouyer Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1999 SHIMIZU Ryo.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: apbus.c,v 1.21.34.1 2011/03/05 15:09:55 bouyer Exp $");
     31 
     32 #define __INTR_PRIVATE
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/malloc.h>
     37 #include <sys/device.h>
     38 #include <sys/proc.h>
     39 #include <sys/intr.h>
     40 
     41 #include <uvm/uvm_extern.h>
     42 
     43 #include <machine/adrsmap.h>
     44 #include <machine/autoconf.h>
     45 #define _NEWSMIPS_BUS_DMA_PRIVATE
     46 #include <machine/bus.h>
     47 #include <newsmips/apbus/apbusvar.h>
     48 
     49 static int  apbusmatch(device_t, cfdata_t, void *);
     50 static void apbusattach(device_t, device_t, void *);
     51 static int apbusprint(void *, const char *);
     52 #if 0
     53 static void *aptokseg0 (void *);
     54 #endif
     55 static void apbus_dma_unmapped(bus_dma_tag_t, bus_dmamap_t);
     56 static int apbus_dma_mapalloc(bus_dma_tag_t, bus_dmamap_t, int);
     57 static void apbus_dma_mapfree(bus_dma_tag_t, bus_dmamap_t);
     58 static void apbus_dma_mapset(bus_dma_tag_t, bus_dmamap_t);
     59 static int apbus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
     60     bus_size_t, int, bus_dmamap_t *);
     61 static void apbus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
     62 static int apbus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t,
     63     struct proc *, int);
     64 static int apbus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *,
     65     int);
     66 static int apbus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *,
     67     int);
     68 static int apbus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
     69     bus_dma_segment_t *, int, bus_size_t, int);
     70 static void apbus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
     71     bus_size_t, int);
     72 
     73 #define	MAXAPDEVNUM	32
     74 
     75 CFATTACH_DECL_NEW(ap, 0,
     76     apbusmatch, apbusattach, NULL, NULL);
     77 
     78 #define	NLEVEL	2
     79 static struct newsmips_intr apintr_tab[NLEVEL];
     80 
     81 static int
     82 apbusmatch(device_t parent, cfdata_t cf, void *aux)
     83 {
     84 	struct confargs *ca = aux;
     85 
     86 	if (strcmp(ca->ca_name, "ap") != 0)
     87 		return 0;
     88 
     89 	return 1;
     90 }
     91 
     92 
     93 static void
     94 apbusattach(device_t parent, device_t self, void *aux)
     95 {
     96 	struct apbus_attach_args child;
     97 	struct apbus_dev *apdev;
     98 	struct apbus_ctl *apctl;
     99 	struct newsmips_intr *ip;
    100 	int i;
    101 
    102 	mips_set_wbflush(apbus_wbflush);
    103 
    104 	*(volatile uint32_t *)(NEWS5000_APBUS_INTST) = 0xffffffff;
    105 	*(volatile uint32_t *)(NEWS5000_APBUS_INTMSK) = 0xffffffff;
    106 	*(volatile uint32_t *)(NEWS5000_APBUS_CTRL) = 0x00000004;
    107 	*(volatile uint32_t *)(NEWS5000_APBUS_DMA) = 0xffffffff;
    108 
    109 	aprint_normal("\n");
    110 
    111 	for (i = 0; i < NLEVEL; i++) {
    112 		ip = &apintr_tab[i];
    113 		LIST_INIT(&ip->intr_q);
    114 	}
    115 
    116 	/*
    117 	 * get first ap-device
    118 	 */
    119 	apdev = apbus_lookupdev(NULL);
    120 
    121 	/*
    122 	 * trace device chain
    123 	 */
    124 	while (apdev) {
    125 		apctl = apdev->apbd_ctl;
    126 
    127 		/*
    128 		 * probe physical device only
    129 		 * (no pseudo device)
    130 		 */
    131 		if (apctl && apctl->apbc_hwbase) {
    132 			/*
    133 			 * ... and, all units
    134 			 */
    135 			while (apctl) {
    136 				/* make apbus_attach_args for devices */
    137 				child.apa_name = apdev->apbd_name;
    138 				child.apa_ctlnum = apctl->apbc_ctlno;
    139 				child.apa_slotno = apctl->apbc_sl;
    140 				child.apa_hwbase = apctl->apbc_hwbase;
    141 
    142 				config_found(self, &child, apbusprint);
    143 
    144 				apctl = apctl->apbc_link;
    145 			}
    146 		}
    147 
    148 		apdev = apdev->apbd_link;
    149 	}
    150 }
    151 
    152 int
    153 apbusprint(void *aux, const char *pnp)
    154 {
    155 	struct apbus_attach_args *a = aux;
    156 
    157 	if (pnp)
    158 		aprint_normal("%s at %s slot%d addr 0x%lx",
    159 		    a->apa_name, pnp, a->apa_slotno, a->apa_hwbase);
    160 
    161 	return UNCONF;
    162 }
    163 
    164 #if 0
    165 void *
    166 aptokseg0(void *va)
    167 {
    168 	vaddr_t addr = (vaddr_t)va;
    169 
    170 	if (addr >= 0xfff00000) {
    171 		addr -= 0xfff00000;
    172 		addr += physmem << PGSHIFT;
    173 		addr += 0x80000000;
    174 		va = (void *)addr;
    175 	}
    176 	return va;
    177 }
    178 #endif
    179 
    180 void
    181 apbus_wbflush(void)
    182 {
    183 	volatile int32_t * const our_wbflush = (int32_t *)NEWS5000_WBFLUSH;
    184 
    185 	(*mips_locore_jumpvec.ljv_wbflush)();
    186 	(void)*our_wbflush;
    187 }
    188 
    189 /*
    190  * called by hardware interrupt routine
    191  */
    192 int
    193 apbus_intr_dispatch(int level, int stat)
    194 {
    195 	struct newsmips_intr *ip;
    196 	struct newsmips_intrhand *ih;
    197 	int nintr;
    198 
    199 	ip = &apintr_tab[level];
    200 
    201 	nintr = 0;
    202 	LIST_FOREACH(ih, &ip->intr_q, ih_q) {
    203 		if (ih->ih_mask & stat)
    204 			nintr += (*ih->ih_func)(ih->ih_arg);
    205 	}
    206 	return nintr;
    207 }
    208 
    209 /*
    210  * register device interrupt routine
    211  */
    212 void *
    213 apbus_intr_establish(int level, int mask, int priority, int (*func)(void *),
    214     void *arg, const char *name, int ctlno)
    215 {
    216 	struct newsmips_intr *ip;
    217 	struct newsmips_intrhand *ih, *curih;
    218 	volatile uint32_t *inten0, *inten1;
    219 
    220 	ip = &apintr_tab[level];
    221 
    222 	ih = malloc(sizeof(*ih), M_DEVBUF, M_NOWAIT);
    223 	if (ih == NULL)
    224 		panic("%s: can't malloc handler info", __func__);
    225 	ih->ih_mask = mask;
    226 	ih->ih_priority = priority;
    227 	ih->ih_func = func;
    228 	ih->ih_arg = arg;
    229 
    230 	if (LIST_EMPTY(&ip->intr_q)) {
    231 		LIST_INSERT_HEAD(&ip->intr_q, ih, ih_q);
    232 		goto done;
    233 	}
    234 
    235 	for (curih = LIST_FIRST(&ip->intr_q);
    236 	    LIST_NEXT(curih, ih_q) != NULL;
    237 	    curih = LIST_NEXT(curih, ih_q)) {
    238 		if (ih->ih_priority > curih->ih_priority) {
    239 			LIST_INSERT_BEFORE(curih, ih, ih_q);
    240 			goto done;
    241 		}
    242 	}
    243 
    244 	LIST_INSERT_AFTER(curih, ih, ih_q);
    245 
    246  done:
    247 	switch (level) {
    248 	case 0:
    249 		inten0 = (volatile uint32_t *)NEWS5000_INTEN0;
    250 		*inten0 |= mask;
    251 		break;
    252 	case 1:
    253 		inten1 = (volatile uint32_t *)NEWS5000_INTEN1;
    254 		*inten1 |= mask;
    255 		break;
    256 	}
    257 
    258 	return (void *)ih;
    259 }
    260 
    261 static void
    262 apbus_dma_unmapped(bus_dma_tag_t t, bus_dmamap_t map)
    263 {
    264 	int seg;
    265 
    266 	for (seg = 0; seg < map->dm_nsegs; seg++) {
    267 		/*
    268 		 * set MSB to indicate unmapped DMA.
    269 		 * also need bit 30 for memory over 256MB.
    270 		 */
    271 		if ((map->dm_segs[seg].ds_addr & 0x30000000) == 0)
    272 			map->dm_segs[seg].ds_addr |= 0x80000000;
    273 		else
    274 			map->dm_segs[seg].ds_addr |= 0xc0000000;
    275 	}
    276 }
    277 
    278 #define	APBUS_NDMAMAP	(NEWS5000_APBUS_MAPSIZE / NEWS5000_APBUS_MAPENT)
    279 #define	APBUS_MAPTBL(n, v)	\
    280 			(*(volatile uint32_t *)(NEWS5000_APBUS_DMAMAP + \
    281 			 NEWS5000_APBUS_MAPENT * (n) + 1) = (v))
    282 static uint8_t apbus_dma_maptbl[APBUS_NDMAMAP];
    283 
    284 static int
    285 apbus_dma_mapalloc(bus_dma_tag_t t, bus_dmamap_t map, int flags)
    286 {
    287 	int i, j, cnt;
    288 
    289 	cnt = round_page(map->_dm_size) / PAGE_SIZE;
    290 
    291  again:
    292 	for (i = 0; i < APBUS_NDMAMAP; i += j + 1) {
    293 		for (j = 0; j < cnt; j++) {
    294 			if (apbus_dma_maptbl[i + j])
    295 				break;
    296 		}
    297 		if (j == cnt) {
    298 			for (j = 0; j < cnt; j++)
    299 				apbus_dma_maptbl[i + j] = 1;
    300 			map->_dm_maptbl = i;
    301 			map->_dm_maptblcnt = cnt;
    302 			return 0;
    303 		}
    304 	}
    305 	if ((flags & BUS_DMA_NOWAIT) == 0) {
    306 		tsleep(&apbus_dma_maptbl, PRIBIO, "apdmat", 0);
    307 		goto again;
    308 	}
    309 	return ENOMEM;
    310 }
    311 
    312 static void
    313 apbus_dma_mapfree(bus_dma_tag_t t, bus_dmamap_t map)
    314 {
    315 	int i, n;
    316 
    317 	if (map->_dm_maptblcnt > 0) {
    318 		n = map->_dm_maptbl;
    319 		for (i = 0; i < map->_dm_maptblcnt; i++, n++) {
    320 #ifdef DIAGNOSTIC
    321 			if (apbus_dma_maptbl[n] == 0)
    322 				panic("freeing free DMA map");
    323 			APBUS_MAPTBL(n, 0xffffffff);	/* causes DMA error */
    324 #endif
    325 			apbus_dma_maptbl[n] = 0;
    326 		}
    327 		wakeup(&apbus_dma_maptbl);
    328 		map->_dm_maptblcnt = 0;
    329 	}
    330 }
    331 
    332 static void
    333 apbus_dma_mapset(bus_dma_tag_t t, bus_dmamap_t map)
    334 {
    335 	int i;
    336 	bus_addr_t addr, eaddr;
    337 	int seg;
    338 	bus_dma_segment_t *segs;
    339 
    340 	i = 0;
    341 	for (seg = 0; seg < map->dm_nsegs; seg++) {
    342 		segs = &map->dm_segs[seg];
    343 		for (addr = segs->ds_addr, eaddr = addr + segs->ds_len;
    344 		    addr < eaddr; addr += PAGE_SIZE, i++) {
    345 #ifdef DIAGNOSTIC
    346 			if (i >= map->_dm_maptblcnt)
    347 				panic("DMA map table overflow");
    348 #endif
    349 			APBUS_MAPTBL(map->_dm_maptbl + i,
    350 				NEWS5000_APBUS_MAP_VALID |
    351 				NEWS5000_APBUS_MAP_COHERENT |
    352 				(addr >> PGSHIFT));
    353 		}
    354 	}
    355 	map->dm_segs[0].ds_addr = map->_dm_maptbl << PGSHIFT;
    356 	map->dm_segs[0].ds_len = map->dm_mapsize;
    357 	map->dm_nsegs = 1;
    358 }
    359 
    360 static int
    361 apbus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments,
    362     bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp)
    363 {
    364 	int error;
    365 
    366 	if (flags & NEWSMIPS_DMAMAP_MAPTBL)
    367 		nsegments = round_page(size) / PAGE_SIZE;
    368 	error = _bus_dmamap_create(t, size, nsegments, maxsegsz, boundary,
    369 	    flags, dmamp);
    370 	if (error == 0 && (flags & NEWSMIPS_DMAMAP_MAPTBL)) {
    371 		error = apbus_dma_mapalloc(t, *dmamp, flags);
    372 		if (error) {
    373 			_bus_dmamap_destroy(t, *dmamp);
    374 			*dmamp = NULL;
    375 		}
    376 	}
    377 	return error;
    378 }
    379 
    380 static void
    381 apbus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map)
    382 {
    383 
    384 	if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    385 		apbus_dma_mapfree(t, map);
    386 	_bus_dmamap_destroy(t, map);
    387 }
    388 
    389 static int
    390 apbus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
    391     bus_size_t buflen, struct proc *p, int flags)
    392 {
    393 	int error;
    394 
    395 	error = _bus_dmamap_load(t, map, buf, buflen, p, flags);
    396 	if (error == 0) {
    397 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    398 			apbus_dma_mapset(t, map);
    399 		else
    400 			apbus_dma_unmapped(t, map);
    401 	}
    402 	return error;
    403 }
    404 
    405 static int
    406 apbus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0,
    407     int flags)
    408 {
    409 	int error;
    410 
    411 	error = _bus_dmamap_load_mbuf(t, map, m0, flags);
    412 	if (error == 0) {
    413 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    414 			apbus_dma_mapset(t, map);
    415 		else
    416 			apbus_dma_unmapped(t, map);
    417 	}
    418 	return error;
    419 }
    420 
    421 static int
    422 apbus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio,
    423     int flags)
    424 {
    425 	int error;
    426 
    427 	error = _bus_dmamap_load_uio(t, map, uio, flags);
    428 	if (error == 0) {
    429 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    430 			apbus_dma_mapset(t, map);
    431 		else
    432 			apbus_dma_unmapped(t, map);
    433 	}
    434 	return error;
    435 }
    436 
    437 static int
    438 apbus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map,
    439     bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
    440 {
    441 	int error;
    442 
    443 	error = _bus_dmamap_load_raw(t, map, segs, nsegs, size, flags);
    444 	if (error == 0) {
    445 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    446 			apbus_dma_mapset(t, map);
    447 		else
    448 			apbus_dma_unmapped(t, map);
    449 	}
    450 	return error;
    451 }
    452 
    453 static void
    454 apbus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset,
    455     bus_size_t len, int ops)
    456 {
    457 
    458 	/*
    459 	 * Flush DMA cache by issuing IO read for the AProm of specified slot.
    460 	 */
    461 	bus_space_read_4(t->_slotbaset, t->_slotbaseh, 0);
    462 
    463 	bus_dmamap_sync(&newsmips_default_bus_dma_tag, map, offset, len, ops);
    464 }
    465 
    466 struct newsmips_bus_dma_tag apbus_dma_tag = {
    467 	apbus_dmamap_create,
    468 	apbus_dmamap_destroy,
    469 	apbus_dmamap_load,
    470 	apbus_dmamap_load_mbuf,
    471 	apbus_dmamap_load_uio,
    472 	apbus_dmamap_load_raw,
    473 	_bus_dmamap_unload,
    474 	apbus_dmamap_sync,
    475 	_bus_dmamem_alloc,
    476 	_bus_dmamem_free,
    477 	_bus_dmamem_map,
    478 	_bus_dmamem_unmap,
    479 	_bus_dmamem_mmap,
    480 };
    481 
    482 struct newsmips_bus_dma_tag *
    483 apbus_dmatag_init(struct apbus_attach_args *apa)
    484 {
    485 	struct newsmips_bus_dma_tag *dmat;
    486 
    487 	dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
    488 	if (dmat != NULL) {
    489 		memcpy(dmat, &apbus_dma_tag, sizeof(*dmat));
    490 		dmat->_slotno = apa->apa_slotno;
    491 		dmat->_slotbaset = 0;
    492 		dmat->_slotbaseh = apa->apa_hwbase;
    493 	}
    494 	return dmat;
    495 }
    496