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apbus.c revision 1.24 
      1 /*	$NetBSD: apbus.c,v 1.24 2018/09/30 14:09:35 tsutsui 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 1.24 2018/09/30 14:09:35 tsutsui 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 	apbus_map_romwork();
    103 	mips_set_wbflush(apbus_wbflush);
    104 
    105 	*(volatile uint32_t *)(NEWS5000_APBUS_INTST) = 0xffffffff;
    106 	*(volatile uint32_t *)(NEWS5000_APBUS_INTMSK) = 0xffffffff;
    107 	*(volatile uint32_t *)(NEWS5000_APBUS_CTRL) = 0x00000004;
    108 	*(volatile uint32_t *)(NEWS5000_APBUS_DMA) = 0xffffffff;
    109 
    110 	aprint_normal("\n");
    111 
    112 	for (i = 0; i < NLEVEL; i++) {
    113 		ip = &apintr_tab[i];
    114 		LIST_INIT(&ip->intr_q);
    115 	}
    116 
    117 	/*
    118 	 * get first ap-device
    119 	 */
    120 	apdev = apbus_lookupdev(NULL);
    121 
    122 	/*
    123 	 * trace device chain
    124 	 */
    125 	while (apdev) {
    126 		apctl = apdev->apbd_ctl;
    127 
    128 		/*
    129 		 * probe physical device only
    130 		 * (no pseudo device)
    131 		 */
    132 		if (apctl && apctl->apbc_hwbase) {
    133 			/*
    134 			 * ... and, all units
    135 			 */
    136 			while (apctl) {
    137 				/* make apbus_attach_args for devices */
    138 				child.apa_name = apdev->apbd_name;
    139 				child.apa_ctlnum = apctl->apbc_ctlno;
    140 				child.apa_slotno = apctl->apbc_sl;
    141 				child.apa_hwbase = apctl->apbc_hwbase;
    142 
    143 				config_found(self, &child, apbusprint);
    144 
    145 				apctl = apctl->apbc_link;
    146 			}
    147 		}
    148 
    149 		apdev = apdev->apbd_link;
    150 	}
    151 }
    152 
    153 int
    154 apbusprint(void *aux, const char *pnp)
    155 {
    156 	struct apbus_attach_args *a = aux;
    157 
    158 	if (pnp)
    159 		aprint_normal("%s at %s slot%d addr 0x%lx",
    160 		    a->apa_name, pnp, a->apa_slotno, a->apa_hwbase);
    161 
    162 	return UNCONF;
    163 }
    164 
    165 #if 0
    166 void *
    167 aptokseg0(void *va)
    168 {
    169 	vaddr_t addr = (vaddr_t)va;
    170 
    171 	if (addr >= 0xfff00000) {
    172 		addr -= 0xfff00000;
    173 		addr += physmem << PGSHIFT;
    174 		addr += 0x80000000;
    175 		va = (void *)addr;
    176 	}
    177 	return va;
    178 }
    179 #endif
    180 
    181 void
    182 apbus_wbflush(void)
    183 {
    184 	volatile int32_t * const our_wbflush = (int32_t *)NEWS5000_WBFLUSH;
    185 
    186 	(*mips_locore_jumpvec.ljv_wbflush)();
    187 	(void)*our_wbflush;
    188 }
    189 
    190 /*
    191  * called by hardware interrupt routine
    192  */
    193 int
    194 apbus_intr_dispatch(int level, int stat)
    195 {
    196 	struct newsmips_intr *ip;
    197 	struct newsmips_intrhand *ih;
    198 	int nintr;
    199 
    200 	ip = &apintr_tab[level];
    201 
    202 	nintr = 0;
    203 	LIST_FOREACH(ih, &ip->intr_q, ih_q) {
    204 		if (ih->ih_mask & stat) {
    205 			nintr += (*ih->ih_func)(ih->ih_arg);
    206 			ih->intr_count.ev_count++;
    207 		}
    208 	}
    209 	return nintr;
    210 }
    211 
    212 /*
    213  * register device interrupt routine
    214  */
    215 void *
    216 apbus_intr_establish(int level, int mask, int priority, int (*func)(void *),
    217     void *arg, const char *name, int ctlno)
    218 {
    219 	struct newsmips_intr *ip;
    220 	struct newsmips_intrhand *ih, *curih;
    221 	volatile uint32_t *inten0, *inten1;
    222 
    223 	ip = &apintr_tab[level];
    224 
    225 	ih = malloc(sizeof(*ih), M_DEVBUF, M_NOWAIT);
    226 	if (ih == NULL)
    227 		panic("%s: can't malloc handler info", __func__);
    228 	ih->ih_mask = mask;
    229 	ih->ih_priority = priority;
    230 	ih->ih_func = func;
    231 	ih->ih_arg = arg;
    232 	evcnt_attach_dynamic(&ih->intr_count, EVCNT_TYPE_INTR,
    233 	    NULL, "apbus", name);
    234 
    235 	if (LIST_EMPTY(&ip->intr_q)) {
    236 		LIST_INSERT_HEAD(&ip->intr_q, ih, ih_q);
    237 		goto done;
    238 	}
    239 
    240 	for (curih = LIST_FIRST(&ip->intr_q);
    241 	    LIST_NEXT(curih, ih_q) != NULL;
    242 	    curih = LIST_NEXT(curih, ih_q)) {
    243 		if (ih->ih_priority > curih->ih_priority) {
    244 			LIST_INSERT_BEFORE(curih, ih, ih_q);
    245 			goto done;
    246 		}
    247 	}
    248 
    249 	LIST_INSERT_AFTER(curih, ih, ih_q);
    250 
    251  done:
    252 	switch (level) {
    253 	case 0:
    254 		inten0 = (volatile uint32_t *)NEWS5000_INTEN0;
    255 		*inten0 |= mask;
    256 		break;
    257 	case 1:
    258 		inten1 = (volatile uint32_t *)NEWS5000_INTEN1;
    259 		*inten1 |= mask;
    260 		break;
    261 	}
    262 
    263 	return (void *)ih;
    264 }
    265 
    266 static void
    267 apbus_dma_unmapped(bus_dma_tag_t t, bus_dmamap_t map)
    268 {
    269 	int seg;
    270 
    271 	for (seg = 0; seg < map->dm_nsegs; seg++) {
    272 		/*
    273 		 * set MSB to indicate unmapped DMA.
    274 		 * also need bit 30 for memory over 256MB.
    275 		 */
    276 		if ((map->dm_segs[seg].ds_addr & 0x30000000) == 0)
    277 			map->dm_segs[seg].ds_addr |= 0x80000000;
    278 		else
    279 			map->dm_segs[seg].ds_addr |= 0xc0000000;
    280 	}
    281 }
    282 
    283 #define	APBUS_NDMAMAP	(NEWS5000_APBUS_MAPSIZE / NEWS5000_APBUS_MAPENT)
    284 #define	APBUS_MAPTBL(n, v)	\
    285 			(*(volatile uint32_t *)(NEWS5000_APBUS_DMAMAP + \
    286 			 NEWS5000_APBUS_MAPENT * (n) + 1) = (v))
    287 static uint8_t apbus_dma_maptbl[APBUS_NDMAMAP];
    288 
    289 static int
    290 apbus_dma_mapalloc(bus_dma_tag_t t, bus_dmamap_t map, int flags)
    291 {
    292 	int i, j, cnt;
    293 
    294 	cnt = round_page(map->_dm_size) / PAGE_SIZE;
    295 
    296  again:
    297 	for (i = 0; i < APBUS_NDMAMAP; i += j + 1) {
    298 		for (j = 0; j < cnt; j++) {
    299 			if (apbus_dma_maptbl[i + j])
    300 				break;
    301 		}
    302 		if (j == cnt) {
    303 			for (j = 0; j < cnt; j++)
    304 				apbus_dma_maptbl[i + j] = 1;
    305 			map->_dm_maptbl = i;
    306 			map->_dm_maptblcnt = cnt;
    307 			return 0;
    308 		}
    309 	}
    310 	if ((flags & BUS_DMA_NOWAIT) == 0) {
    311 		tsleep(&apbus_dma_maptbl, PRIBIO, "apdmat", 0);
    312 		goto again;
    313 	}
    314 	return ENOMEM;
    315 }
    316 
    317 static void
    318 apbus_dma_mapfree(bus_dma_tag_t t, bus_dmamap_t map)
    319 {
    320 	int i, n;
    321 
    322 	if (map->_dm_maptblcnt > 0) {
    323 		n = map->_dm_maptbl;
    324 		for (i = 0; i < map->_dm_maptblcnt; i++, n++) {
    325 #ifdef DIAGNOSTIC
    326 			if (apbus_dma_maptbl[n] == 0)
    327 				panic("freeing free DMA map");
    328 			APBUS_MAPTBL(n, 0xffffffff);	/* causes DMA error */
    329 #endif
    330 			apbus_dma_maptbl[n] = 0;
    331 		}
    332 		wakeup(&apbus_dma_maptbl);
    333 		map->_dm_maptblcnt = 0;
    334 	}
    335 }
    336 
    337 static void
    338 apbus_dma_mapset(bus_dma_tag_t t, bus_dmamap_t map)
    339 {
    340 	int i;
    341 	bus_addr_t addr, eaddr;
    342 	int seg;
    343 	bus_dma_segment_t *segs;
    344 
    345 	i = 0;
    346 	for (seg = 0; seg < map->dm_nsegs; seg++) {
    347 		segs = &map->dm_segs[seg];
    348 		for (addr = segs->ds_addr, eaddr = addr + segs->ds_len;
    349 		    addr < eaddr; addr += PAGE_SIZE, i++) {
    350 #ifdef DIAGNOSTIC
    351 			if (i >= map->_dm_maptblcnt)
    352 				panic("DMA map table overflow");
    353 #endif
    354 			APBUS_MAPTBL(map->_dm_maptbl + i,
    355 				NEWS5000_APBUS_MAP_VALID |
    356 				NEWS5000_APBUS_MAP_COHERENT |
    357 				(addr >> PGSHIFT));
    358 		}
    359 	}
    360 	map->dm_segs[0].ds_addr = map->_dm_maptbl << PGSHIFT;
    361 	map->dm_segs[0].ds_len = map->dm_mapsize;
    362 	map->dm_nsegs = 1;
    363 }
    364 
    365 static int
    366 apbus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments,
    367     bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp)
    368 {
    369 	int error;
    370 
    371 	if (flags & NEWSMIPS_DMAMAP_MAPTBL)
    372 		nsegments = round_page(size) / PAGE_SIZE;
    373 	error = _bus_dmamap_create(t, size, nsegments, maxsegsz, boundary,
    374 	    flags, dmamp);
    375 	if (error == 0 && (flags & NEWSMIPS_DMAMAP_MAPTBL)) {
    376 		error = apbus_dma_mapalloc(t, *dmamp, flags);
    377 		if (error) {
    378 			_bus_dmamap_destroy(t, *dmamp);
    379 			*dmamp = NULL;
    380 		}
    381 	}
    382 	return error;
    383 }
    384 
    385 static void
    386 apbus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t map)
    387 {
    388 
    389 	if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    390 		apbus_dma_mapfree(t, map);
    391 	_bus_dmamap_destroy(t, map);
    392 }
    393 
    394 static int
    395 apbus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
    396     bus_size_t buflen, struct proc *p, int flags)
    397 {
    398 	int error;
    399 
    400 	error = _bus_dmamap_load(t, map, buf, buflen, p, flags);
    401 	if (error == 0) {
    402 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    403 			apbus_dma_mapset(t, map);
    404 		else
    405 			apbus_dma_unmapped(t, map);
    406 	}
    407 	return error;
    408 }
    409 
    410 static int
    411 apbus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m0,
    412     int flags)
    413 {
    414 	int error;
    415 
    416 	error = _bus_dmamap_load_mbuf(t, map, m0, flags);
    417 	if (error == 0) {
    418 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    419 			apbus_dma_mapset(t, map);
    420 		else
    421 			apbus_dma_unmapped(t, map);
    422 	}
    423 	return error;
    424 }
    425 
    426 static int
    427 apbus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio,
    428     int flags)
    429 {
    430 	int error;
    431 
    432 	error = _bus_dmamap_load_uio(t, map, uio, flags);
    433 	if (error == 0) {
    434 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    435 			apbus_dma_mapset(t, map);
    436 		else
    437 			apbus_dma_unmapped(t, map);
    438 	}
    439 	return error;
    440 }
    441 
    442 static int
    443 apbus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map,
    444     bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
    445 {
    446 	int error;
    447 
    448 	error = _bus_dmamap_load_raw(t, map, segs, nsegs, size, flags);
    449 	if (error == 0) {
    450 		if (map->_dm_flags & NEWSMIPS_DMAMAP_MAPTBL)
    451 			apbus_dma_mapset(t, map);
    452 		else
    453 			apbus_dma_unmapped(t, map);
    454 	}
    455 	return error;
    456 }
    457 
    458 static void
    459 apbus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t offset,
    460     bus_size_t len, int ops)
    461 {
    462 
    463 	/*
    464 	 * Flush DMA cache by issuing IO read for the AProm of specified slot.
    465 	 */
    466 	bus_space_read_4(t->_slotbaset, t->_slotbaseh, 0);
    467 
    468 	bus_dmamap_sync(&newsmips_default_bus_dma_tag, map, offset, len, ops);
    469 }
    470 
    471 struct newsmips_bus_dma_tag apbus_dma_tag = {
    472 	apbus_dmamap_create,
    473 	apbus_dmamap_destroy,
    474 	apbus_dmamap_load,
    475 	apbus_dmamap_load_mbuf,
    476 	apbus_dmamap_load_uio,
    477 	apbus_dmamap_load_raw,
    478 	_bus_dmamap_unload,
    479 	apbus_dmamap_sync,
    480 	_bus_dmamem_alloc,
    481 	_bus_dmamem_free,
    482 	_bus_dmamem_map,
    483 	_bus_dmamem_unmap,
    484 	_bus_dmamem_mmap,
    485 };
    486 
    487 struct newsmips_bus_dma_tag *
    488 apbus_dmatag_init(struct apbus_attach_args *apa)
    489 {
    490 	struct newsmips_bus_dma_tag *dmat;
    491 
    492 	dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
    493 	if (dmat != NULL) {
    494 		memcpy(dmat, &apbus_dma_tag, sizeof(*dmat));
    495 		dmat->_slotno = apa->apa_slotno;
    496 		dmat->_slotbaset = 0;
    497 		dmat->_slotbaseh = apa->apa_hwbase;
    498 	}
    499 	return dmat;
    500 }
    501