1 /* $NetBSD: twevar.h,v 1.13 2002/12/13 23:31:33 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2001, 2002 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 /* Per-controller state. */ 47 struct twe_softc { 48 struct device sc_dv; 49 bus_space_tag_t sc_iot; 50 bus_space_handle_t sc_ioh; 51 bus_dma_tag_t sc_dmat; 52 bus_dmamap_t sc_dmamap; 53 void *sc_ih; 54 caddr_t sc_cmds; 55 bus_addr_t sc_cmds_paddr; 56 int sc_nccbs; 57 struct twe_ccb *sc_ccbs; 58 SIMPLEQ_HEAD(, twe_ccb) sc_ccb_queue; 59 SLIST_HEAD(, twe_ccb) sc_ccb_freelist; 60 int sc_flags; 61 int sc_nunits; 62 u_int sc_dsize[TWE_MAX_UNITS]; 63 }; 64 #define TWEF_AEN 0x01 /* retrieving an AEN */ 65 #define TWEF_OPEN 0x02 /* control device is opened */ 66 67 /* Optional per-command context. */ 68 struct twe_context { 69 void (*tx_handler)(struct twe_ccb *, int); 70 void *tx_context; 71 struct device *tx_dv; 72 }; 73 74 /* Command control block. */ 75 struct twe_ccb { 76 union { 77 SIMPLEQ_ENTRY(twe_ccb) simpleq; 78 SLIST_ENTRY(twe_ccb) slist; 79 } ccb_chain; 80 struct twe_cmd *ccb_cmd; 81 int ccb_cmdid; 82 int ccb_flags; 83 void *ccb_data; 84 int ccb_datasize; 85 vaddr_t ccb_abuf; 86 bus_dmamap_t ccb_dmamap_xfer; 87 struct twe_context ccb_tx; 88 }; 89 #define TWE_CCB_DATA_IN 0x01 /* Map describes inbound xfer */ 90 #define TWE_CCB_DATA_OUT 0x02 /* Map describes outbound xfer */ 91 #define TWE_CCB_COMPLETE 0x04 /* Command completed */ 92 #define TWE_CCB_ACTIVE 0x08 /* Command active */ 93 #define TWE_CCB_PARAM 0x10 /* For parameter retrieval */ 94 #define TWE_CCB_ALLOCED 0x20 /* CCB allocated */ 95 96 struct twe_attach_args { 97 int twea_unit; 98 }; 99 100 #define tweacf_unit cf_loc[TWECF_UNIT] 101 102 int twe_ccb_alloc(struct twe_softc *, struct twe_ccb **, int); 103 void twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb); 104 void twe_ccb_free(struct twe_softc *sc, struct twe_ccb *); 105 int twe_ccb_map(struct twe_softc *, struct twe_ccb *); 106 int twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int); 107 int twe_ccb_submit(struct twe_softc *, struct twe_ccb *); 108 void twe_ccb_unmap(struct twe_softc *, struct twe_ccb *); 109 110 static __inline__ size_t twe_get_maxsegs(void) { 111 size_t max_segs = ((MAXPHYS + PAGE_SIZE - 1) / PAGE_SIZE) + 1; 112 #ifdef TWE_SG_SIZE 113 if (TWE_SG_SIZE < max_segs) 114 max_segs = TWE_SG_SIZE; 115 #endif 116 return max_segs; 117 } 118 119 static __inline__ size_t twe_get_maxxfer(size_t maxsegs) { 120 return (maxsegs - 1) * PAGE_SIZE; 121 } 122 123 #endif /* !_PCI_TWEVAR_H_ */ 124