/* $NetBSD: if_le_ioasic.c,v 1.30 2008/04/04 12:25:07 tsutsui Exp $ */ /* * Copyright (c) 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ /* * LANCE on DEC IOCTL ASIC. */ #include __KERNEL_RCSID(0, "$NetBSD: if_le_ioasic.c,v 1.30 2008/04/04 12:25:07 tsutsui Exp $"); #include "opt_inet.h" #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #include #include #include #include #include #include #include #include struct le_ioasic_softc { struct am7990_softc sc_am7990; /* glue to MI code */ struct lereg1 *sc_r1; /* LANCE registers */ /* XXX must match with le_softc of if_levar.h XXX */ bus_dma_tag_t sc_dmat; /* bus dma tag */ bus_dmamap_t sc_dmamap; /* bus dmamap */ }; static int le_ioasic_match(device_t, cfdata_t, void *); static void le_ioasic_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(le_ioasic, sizeof(struct le_softc), le_ioasic_match, le_ioasic_attach, NULL, NULL); static void le_ioasic_copytobuf_gap2(struct lance_softc *, void *, int, int); static void le_ioasic_copyfrombuf_gap2(struct lance_softc *, void *, int, int); static void le_ioasic_copytobuf_gap16(struct lance_softc *, void *, int, int); static void le_ioasic_copyfrombuf_gap16(struct lance_softc *, void *, int, int); static void le_ioasic_zerobuf_gap16(struct lance_softc *, int, int); static int le_ioasic_match(device_t parent, cfdata_t cf, void *aux) { struct ioasicdev_attach_args *d = aux; if (strncmp("PMAD-BA ", d->iada_modname, TC_ROM_LLEN) != 0) return 0; return 1; } /* IOASIC LANCE DMA needs 128KB boundary aligned 128KB chunk */ #define LE_IOASIC_MEMSIZE (128 * 1024) #define LE_IOASIC_MEMALIGN (128 * 1024) static void le_ioasic_attach(device_t parent, device_t self, void *aux) { struct le_ioasic_softc *sc = device_private(self); struct ioasicdev_attach_args *d = aux; struct lance_softc *le = &sc->sc_am7990.lsc; struct ioasic_softc *iosc = device_private(parent); bus_space_tag_t ioasic_bst; bus_space_handle_t ioasic_bsh; bus_dma_tag_t dmat; bus_dma_segment_t seg; tc_addr_t tca; uint32_t ssr; int rseg; void *le_iomem; le->sc_dev = self; ioasic_bst = iosc->sc_bst; ioasic_bsh = iosc->sc_bsh; dmat = sc->sc_dmat = iosc->sc_dmat; /* * Allocate a DMA area for the chip. */ if (bus_dmamem_alloc(dmat, LE_IOASIC_MEMSIZE, LE_IOASIC_MEMALIGN, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) { aprint_error(": can't allocate DMA area for LANCE\n"); return; } if (bus_dmamem_map(dmat, &seg, rseg, LE_IOASIC_MEMSIZE, &le_iomem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { aprint_error(": can't map DMA area for LANCE\n"); bus_dmamem_free(dmat, &seg, rseg); return; } /* * Create and load the DMA map for the DMA area. */ if (bus_dmamap_create(dmat, LE_IOASIC_MEMSIZE, 1, LE_IOASIC_MEMSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_dmamap)) { aprint_error(": can't create DMA map\n"); goto bad; } if (bus_dmamap_load(dmat, sc->sc_dmamap, le_iomem, LE_IOASIC_MEMSIZE, NULL, BUS_DMA_NOWAIT)) { aprint_error(": can't load DMA map\n"); goto bad; } /* * Bind 128KB buffer with IOASIC DMA. */ tca = IOASIC_DMA_ADDR(sc->sc_dmamap->dm_segs[0].ds_addr); bus_space_write_4(ioasic_bst, ioasic_bsh, IOASIC_LANCE_DMAPTR, tca); ssr = bus_space_read_4(ioasic_bst, ioasic_bsh, IOASIC_CSR); ssr |= IOASIC_CSR_DMAEN_LANCE; bus_space_write_4(ioasic_bst, ioasic_bsh, IOASIC_CSR, ssr); sc->sc_r1 = (struct lereg1 *) TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr)); le->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem); le->sc_copytodesc = le_ioasic_copytobuf_gap2; le->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2; le->sc_copytobuf = le_ioasic_copytobuf_gap16; le->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16; le->sc_zerobuf = le_ioasic_zerobuf_gap16; dec_le_common_attach(&sc->sc_am7990, (uint8_t *)iosc->sc_base + IOASIC_SLOT_2_START); ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET, am7990_intr, sc); return; bad: bus_dmamem_unmap(dmat, le_iomem, LE_IOASIC_MEMSIZE); bus_dmamem_free(dmat, &seg, rseg); } /* * Special memory access functions needed by ioasic-attached LANCE * chips. */ /* * gap2: two bytes of data followed by two bytes of pad. * * Buffers must be 4-byte aligned. The code doesn't worry about * doing an extra byte. */ void le_ioasic_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len) { volatile void *buf = sc->sc_mem; uint8_t *from = fromv; volatile uint16_t *bptr; if (boff & 0x1) { /* handle unaligned first byte */ bptr = ((volatile uint16_t *)buf) + (boff - 1); *bptr = (*from++ << 8) | (*bptr & 0xff); bptr += 2; len--; } else bptr = ((volatile uint16_t *)buf) + boff; while (len > 1) { *bptr = (from[1] << 8) | (from[0] & 0xff); bptr += 2; from += 2; len -= 2; } if (len == 1) *bptr = (uint16_t)*from; } void le_ioasic_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len) { volatile void *buf = sc->sc_mem; uint8_t *to = tov; volatile uint16_t *bptr; uint16_t tmp; if (boff & 0x1) { /* handle unaligned first byte */ bptr = ((volatile uint16_t *)buf) + (boff - 1); *to++ = (*bptr >> 8) & 0xff; bptr += 2; len--; } else bptr = ((volatile uint16_t *)buf) + boff; while (len > 1) { tmp = *bptr; *to++ = tmp & 0xff; *to++ = (tmp >> 8) & 0xff; bptr += 2; len -= 2; } if (len == 1) *to = *bptr & 0xff; } /* * gap16: 16 bytes of data followed by 16 bytes of pad. * * Buffers must be 32-byte aligned. */ void le_ioasic_copytobuf_gap16(struct lance_softc *sc, void *fromv, int boff, int len) { uint8_t *buf = sc->sc_mem; uint8_t *from = fromv; uint8_t *bptr; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; /* * Dispose of boff so destination of subsequent copies is * 16-byte aligned. */ if (boff) { int xfer; xfer = min(len, 16 - boff); bcopy(from, bptr + boff, xfer); from += xfer; bptr += 32; len -= xfer; } /* Destination of copies is now 16-byte aligned. */ if (len >= 16) switch ((u_long)from & (sizeof(uint32_t) -1)) { case 2: /* Ethernet headers make this the dominant case. */ do { uint32_t *dst = (uint32_t *)bptr; uint16_t t0; uint32_t t1, t2, t3, t4; /* read from odd-16-bit-aligned, cached src */ t0 = *(uint16_t *)(from + 0); t1 = *(uint32_t *)(from + 2); t2 = *(uint32_t *)(from + 6); t3 = *(uint32_t *)(from + 10); t4 = *(uint16_t *)(from + 14); /* DMA buffer is uncached on mips */ dst[0] = t0 | (t1 << 16); dst[1] = (t1 >> 16) | (t2 << 16); dst[2] = (t2 >> 16) | (t3 << 16); dst[3] = (t3 >> 16) | (t4 << 16); from += 16; bptr += 32; len -= 16; } while (len >= 16); break; case 0: do { uint32_t *src = (uint32_t*)from; uint32_t *dst = (uint32_t*)bptr; uint32_t t0, t1, t2, t3; t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3; from += 16; bptr += 32; len -= 16; } while (len >= 16); break; default: /* Does odd-aligned case ever happen? */ do { bcopy(from, bptr, 16); from += 16; bptr += 32; len -= 16; } while (len >= 16); break; } if (len) bcopy(from, bptr, len); } void le_ioasic_copyfrombuf_gap16(struct lance_softc *sc, void *tov, int boff, int len) { uint8_t *buf = sc->sc_mem; uint8_t *to = tov; uint8_t *bptr; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; /* Dispose of boff. source of copy is subsequently 16-byte aligned. */ if (boff) { int xfer; xfer = min(len, 16 - boff); bcopy(bptr + boff, to, xfer); to += xfer; bptr += 32; len -= xfer; } if (len >= 16) switch ((u_long)to & (sizeof(uint32_t) -1)) { case 2: /* * to is aligned to an odd 16-bit boundary. Ethernet headers * make this the dominant case (98% or more). */ do { uint32_t *src = (uint32_t *)bptr; uint32_t t0, t1, t2, t3; /* read from uncached aligned DMA buf */ t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; /* write to odd-16-bit-word aligned dst */ *(uint16_t *)(to + 0) = (uint16_t)t0; *(uint32_t *)(to + 2) = (t0 >> 16) | (t1 << 16); *(uint32_t *)(to + 6) = (t1 >> 16) | (t2 << 16); *(uint32_t *)(to + 10) = (t2 >> 16) | (t3 << 16); *(uint16_t *)(to + 14) = (t3 >> 16); bptr += 32; to += 16; len -= 16; } while (len > 16); break; case 0: /* 32-bit aligned aligned copy. Rare. */ do { uint32_t *src = (uint32_t *)bptr; uint32_t *dst = (uint32_t *)to; uint32_t t0, t1, t2, t3; t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3; to += 16; bptr += 32; len -= 16; } while (len > 16); break; /* XXX Does odd-byte-aligned case ever happen? */ default: do { bcopy(bptr, to, 16); to += 16; bptr += 32; len -= 16; } while (len > 16); break; } if (len) bcopy(bptr, to, len); } void le_ioasic_zerobuf_gap16(struct lance_softc *sc, int boff, int len) { uint8_t *buf = sc->sc_mem; uint8_t *bptr; int xfer; bptr = buf + ((boff << 1) & ~0x1f); boff &= 0xf; xfer = min(len, 16 - boff); while (len > 0) { bzero(bptr + boff, xfer); bptr += 32; boff = 0; len -= xfer; xfer = min(len, 16); } }