1 /* $NetBSD: twevar.h,v 1.9 2001/10/10 09:33:36 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _PCI_TWEVAR_H_ 40 #define _PCI_TWEVAR_H_ 41 42 #include "locators.h" 43 44 #define TWE_MAX_QUEUECNT 129 45 46 /* XXX NBPG */ 47 #if TWE_SG_SIZE > (((MAXPHYS + NBPG - 1) / NBPG) + 1) 48 #define TWE_MAX_SEGS (((MAXPHYS + NBPG - 1) / NBPG) + 1) 49 #else 50 #define TWE_MAX_SEGS TWE_SG_SIZE 51 #endif 52 #define TWE_MAX_XFER ((TWE_MAX_SEGS - 1) * NBPG) 53 54 /* Per-controller state. */ 55 struct twe_softc { 56 struct device sc_dv; 57 bus_space_tag_t sc_iot; 58 bus_space_handle_t sc_ioh; 59 bus_dma_tag_t sc_dmat; 60 bus_dmamap_t sc_dmamap; 61 void *sc_ih; 62 caddr_t sc_cmds; 63 bus_addr_t sc_cmds_paddr; 64 int sc_nccbs; 65 struct twe_ccb *sc_ccbs; 66 SIMPLEQ_HEAD(, twe_ccb) sc_ccb_queue; 67 SLIST_HEAD(, twe_ccb) sc_ccb_freelist; 68 int sc_flags; 69 int sc_nunits; 70 u_int sc_dsize[TWE_MAX_UNITS]; 71 }; 72 #define TWEF_AEN 0x01 /* retrieving an AEN */ 73 74 /* Optional per-command context. */ 75 struct twe_context { 76 void (*tx_handler)(struct twe_ccb *, int); 77 void *tx_context; 78 struct device *tx_dv; 79 }; 80 81 /* Command control block. */ 82 struct twe_ccb { 83 union { 84 SIMPLEQ_ENTRY(twe_ccb) simpleq; 85 SLIST_ENTRY(twe_ccb) slist; 86 } ccb_chain; 87 struct twe_cmd *ccb_cmd; 88 int ccb_cmdid; 89 int ccb_flags; 90 void *ccb_data; 91 int ccb_datasize; 92 vaddr_t ccb_abuf; 93 bus_dmamap_t ccb_dmamap_xfer; 94 struct twe_context ccb_tx; 95 }; 96 #define TWE_CCB_DATA_IN 0x01 /* Map describes inbound xfer */ 97 #define TWE_CCB_DATA_OUT 0x02 /* Map describes outbound xfer */ 98 #define TWE_CCB_COMPLETE 0x04 /* Command completed */ 99 #define TWE_CCB_ACTIVE 0x08 /* Command active */ 100 #define TWE_CCB_PARAM 0x10 /* For parameter retrieval */ 101 #define TWE_CCB_ALLOCED 0x20 /* CCB allocated */ 102 103 struct twe_attach_args { 104 int twea_unit; 105 }; 106 107 #define tweacf_unit cf_loc[TWECF_UNIT] 108 109 int twe_ccb_alloc(struct twe_softc *, struct twe_ccb **, int); 110 void twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb); 111 void twe_ccb_free(struct twe_softc *sc, struct twe_ccb *); 112 int twe_ccb_map(struct twe_softc *, struct twe_ccb *); 113 int twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int); 114 int twe_ccb_submit(struct twe_softc *, struct twe_ccb *); 115 void twe_ccb_unmap(struct twe_softc *, struct twe_ccb *); 116 117 #endif /* !_PCI_TWEVAR_H_ */ 118