Annotation of sys/dev/pci/if_casvar.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: if_casvar.h,v 1.4 2007/04/15 16:31:30 kettenis Exp $ */
! 2:
! 3: /*
! 4: *
! 5: * Copyright (C) 2007 Mark Kettenis.
! 6: * Copyright (C) 2001 Eduardo Horvath.
! 7: * All rights reserved.
! 8: *
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: *
! 19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
! 20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 22: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
! 23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 29: * SUCH DAMAGE.
! 30: *
! 31: */
! 32:
! 33: #ifndef _IF_CASVAR_H
! 34: #define _IF_CASVAR_H
! 35:
! 36: #include <sys/queue.h>
! 37: #include <sys/timeout.h>
! 38:
! 39: /*
! 40: * Misc. definitions for Sun Cassini ethernet controllers.
! 41: */
! 42:
! 43: /*
! 44: * Preferred page size. Cassini has a configurable page size, but
! 45: * needs at least 8k to handle jumbo frames. This happens to be the
! 46: * default anyway.
! 47: */
! 48: #define CAS_PAGE_SIZE 8192
! 49:
! 50: /*
! 51: * Transmit descriptor ring size. This is arbitrary, but allocate
! 52: * enough descriptors for 64 pending transmissions and 16 segments
! 53: * per packet.
! 54: */
! 55: #define CAS_NTXSEGS 16
! 56:
! 57: #define CAS_TXQUEUELEN 64
! 58: #define CAS_NTXDESC (CAS_TXQUEUELEN * CAS_NTXSEGS)
! 59: #define CAS_NTXDESC_MASK (CAS_NTXDESC - 1)
! 60: #define CAS_NEXTTX(x) ((x + 1) & CAS_NTXDESC_MASK)
! 61:
! 62: struct cas_sxd {
! 63: struct mbuf *sd_mbuf;
! 64: bus_dmamap_t sd_map;
! 65: };
! 66:
! 67: /*
! 68: * Receive descriptor ring size. We have one Rx buffer per incoming
! 69: * packet, so this logic is a little simpler.
! 70: */
! 71: #define CAS_NRXDESC 128
! 72: #define CAS_NRXDESC_MASK (CAS_NRXDESC - 1)
! 73:
! 74: /*
! 75: * Receive completion ring size.
! 76: */
! 77: #define CAS_NRXCOMP 256
! 78: #define CAS_NRXCOMP_MASK (CAS_NRXCOMP - 1)
! 79: #define CAS_NEXTRX(x) ((x + 1) & CAS_NRXCOMP_MASK)
! 80:
! 81: /*
! 82: * Control structures are DMA'd to the Cassini chip. We allocate them in
! 83: * a single clump that maps to a single DMA segment to make several things
! 84: * easier.
! 85: */
! 86: struct cas_control_data {
! 87: /*
! 88: * The transmit descriptors.
! 89: */
! 90: struct cas_desc ccd_txdescs[CAS_NTXDESC];
! 91:
! 92: /*
! 93: * The receive completions.
! 94: */
! 95: struct cas_comp ccd_rxcomps[CAS_NRXCOMP];
! 96:
! 97: /*
! 98: * The receive descriptors.
! 99: */
! 100: struct cas_desc ccd_rxdescs[CAS_NRXDESC];
! 101: };
! 102:
! 103: #define CAS_CDOFF(x) offsetof(struct cas_control_data, x)
! 104: #define CAS_CDTXOFF(x) CAS_CDOFF(ccd_txdescs[(x)])
! 105: #define CAS_CDRXOFF(x) CAS_CDOFF(ccd_rxdescs[(x)])
! 106: #define CAS_CDRXCOFF(x) CAS_CDOFF(ccd_rxcomps[(x)])
! 107:
! 108: /*
! 109: * Software state for receive jobs.
! 110: */
! 111: struct cas_rxsoft {
! 112: bus_dmamap_t rxs_dmamap; /* our DMA map */
! 113: bus_dma_segment_t rxs_dmaseg; /* our DMA segment */
! 114: caddr_t rxs_kva;
! 115: };
! 116:
! 117: /*
! 118: * Software state per device.
! 119: */
! 120: struct cas_softc {
! 121: struct device sc_dev; /* generic device information */
! 122: struct arpcom sc_arpcom; /* ethernet common data */
! 123: struct mii_data sc_mii; /* MII media control */
! 124: #define sc_media sc_mii.mii_media/* shorthand */
! 125: struct timeout sc_tick_ch; /* tick callout */
! 126:
! 127: bus_space_tag_t sc_memt;
! 128: bus_space_handle_t sc_memh;
! 129: void *sc_ih;
! 130:
! 131: bus_dma_tag_t sc_dmatag; /* bus dma tag */
! 132: bus_dmamap_t sc_dmamap; /* bus dma handle */
! 133: int sc_burst; /* DVMA burst size in effect */
! 134: int sc_phys[2]; /* MII instance -> PHY map */
! 135:
! 136: int sc_if_flags;
! 137:
! 138: int sc_mif_config; /* Selected MII reg setting */
! 139:
! 140: /*
! 141: * Ring buffer DMA stuff.
! 142: */
! 143: bus_dma_segment_t sc_cdseg; /* control data memory */
! 144: int sc_cdnseg; /* number of segments */
! 145: bus_dmamap_t sc_cddmamap; /* control data DMA map */
! 146: #define sc_cddma sc_cddmamap->dm_segs[0].ds_addr
! 147:
! 148: /*
! 149: * Software state for transmit and receive descriptors.
! 150: */
! 151: struct cas_sxd sc_txd[CAS_NTXDESC];
! 152: u_int32_t sc_tx_cnt, sc_tx_prod, sc_tx_cons;
! 153:
! 154: struct cas_rxsoft sc_rxsoft[CAS_NRXDESC];
! 155:
! 156: /*
! 157: * Control data structures.
! 158: */
! 159: struct cas_control_data *sc_control_data;
! 160: #define sc_txdescs sc_control_data->ccd_txdescs
! 161: #define sc_rxdescs sc_control_data->ccd_rxdescs
! 162: #define sc_rxcomps sc_control_data->ccd_rxcomps
! 163:
! 164: int sc_rxptr; /* next ready RX descriptor/descsoft */
! 165: int sc_rxfifosize;
! 166: int sc_rxdptr;
! 167:
! 168: /* ========== */
! 169: int sc_inited;
! 170: int sc_debug;
! 171: void *sc_sh; /* shutdownhook cookie */
! 172: };
! 173:
! 174: #define CAS_DMA_READ(v) letoh64(v)
! 175: #define CAS_DMA_WRITE(v) htole64(v)
! 176:
! 177: /*
! 178: * This macro returns the current media entry for *non-MII* media.
! 179: */
! 180: #define CAS_CURRENT_MEDIA(sc) \
! 181: (IFM_SUBTYPE((sc)->sc_mii.mii_media.ifm_cur->ifm_media) != IFM_AUTO ? \
! 182: (sc)->sc_mii.mii_media.ifm_cur : (sc)->sc_nway_active)
! 183:
! 184: /*
! 185: * This macro determines if a change to media-related OPMODE bits requires
! 186: * a chip reset.
! 187: */
! 188: #define CAS_MEDIA_NEEDSRESET(sc, newbits) \
! 189: (((sc)->sc_opmode & OPMODE_MEDIA_BITS) != \
! 190: ((newbits) & OPMODE_MEDIA_BITS))
! 191:
! 192: #define CAS_CDTXADDR(sc, x) ((sc)->sc_cddma + CAS_CDTXOFF((x)))
! 193: #define CAS_CDRXADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXOFF((x)))
! 194: #define CAS_CDRXCADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXCOFF((x)))
! 195:
! 196: #define CAS_CDTXSYNC(sc, x, n, ops) \
! 197: do { \
! 198: int __x, __n; \
! 199: \
! 200: __x = (x); \
! 201: __n = (n); \
! 202: \
! 203: /* If it will wrap around, sync to the end of the ring. */ \
! 204: if ((__x + __n) > CAS_NTXDESC) { \
! 205: bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
! 206: CAS_CDTXOFF(__x), sizeof(struct cas_desc) * \
! 207: (CAS_NTXDESC - __x), (ops)); \
! 208: __n -= (CAS_NTXDESC - __x); \
! 209: __x = 0; \
! 210: } \
! 211: \
! 212: /* Now sync whatever is left. */ \
! 213: bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
! 214: CAS_CDTXOFF(__x), sizeof(struct cas_desc) * __n, (ops)); \
! 215: } while (0)
! 216:
! 217: #define CAS_CDRXSYNC(sc, x, ops) \
! 218: bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
! 219: CAS_CDRXOFF((x)), sizeof(struct cas_desc), (ops))
! 220:
! 221: #define CAS_CDRXCSYNC(sc, x, ops) \
! 222: bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \
! 223: CAS_CDRXCOFF((x)), sizeof(struct cas_desc), (ops))
! 224:
! 225: #define CAS_INIT_RXDESC(sc, d, s) \
! 226: do { \
! 227: struct cas_rxsoft *__rxs = &sc->sc_rxsoft[(s)]; \
! 228: struct cas_desc *__rxd = &sc->sc_rxdescs[(d)]; \
! 229: \
! 230: __rxd->cd_addr = \
! 231: CAS_DMA_WRITE(__rxs->rxs_dmamap->dm_segs[0].ds_addr); \
! 232: __rxd->cd_flags = \
! 233: CAS_DMA_WRITE((s)); \
! 234: CAS_CDRXSYNC((sc), (d), BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); \
! 235: } while (0)
! 236:
! 237: #endif
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to if_casvar.h CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / dev / pci