twevar.h revision 1.17
1 /* $NetBSD: twevar.h,v 1.17 2003/09/22 01:13:03 thorpej 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-array drive information. */ 47 struct twe_drive { 48 uint32_t td_size; 49 uint8_t td_type; 50 uint8_t td_stripe; 51 52 struct device *td_dev; 53 }; 54 55 /* Per-controller state. */ 56 struct twe_softc { 57 struct device sc_dv; 58 bus_space_tag_t sc_iot; 59 bus_space_handle_t sc_ioh; 60 bus_dma_tag_t sc_dmat; 61 bus_dmamap_t sc_dmamap; 62 void *sc_ih; 63 caddr_t sc_cmds; 64 bus_addr_t sc_cmds_paddr; 65 int sc_nccbs; 66 struct twe_ccb *sc_ccbs; 67 SIMPLEQ_HEAD(, twe_ccb) sc_ccb_queue; 68 SLIST_HEAD(, twe_ccb) sc_ccb_freelist; 69 int sc_flags; 70 int sc_nunits; 71 struct twe_drive sc_units[TWE_MAX_UNITS]; 72 73 /* Asynchronous event notification queue for management tools. */ 74 #define TWE_AEN_Q_LENGTH 256 75 uint16_t sc_aen_queue[TWE_AEN_Q_LENGTH]; 76 int sc_aen_head; 77 int sc_aen_tail; 78 }; 79 #define TWEF_OPEN 0x01 /* control device is opened */ 80 #define TWEF_AENQ_WAIT 0x02 /* someone waiting for AENs */ 81 82 /* Optional per-command context. */ 83 struct twe_context { 84 void (*tx_handler)(struct twe_ccb *, int); 85 void *tx_context; 86 struct device *tx_dv; 87 }; 88 89 /* Command control block. */ 90 struct twe_ccb { 91 union { 92 SIMPLEQ_ENTRY(twe_ccb) simpleq; 93 SLIST_ENTRY(twe_ccb) slist; 94 } ccb_chain; 95 struct twe_cmd *ccb_cmd; 96 int ccb_cmdid; 97 int ccb_flags; 98 void *ccb_data; 99 int ccb_datasize; 100 vaddr_t ccb_abuf; 101 bus_dmamap_t ccb_dmamap_xfer; 102 struct twe_context ccb_tx; 103 }; 104 #define TWE_CCB_DATA_IN 0x01 /* Map describes inbound xfer */ 105 #define TWE_CCB_DATA_OUT 0x02 /* Map describes outbound xfer */ 106 #define TWE_CCB_COMPLETE 0x04 /* Command completed */ 107 #define TWE_CCB_ACTIVE 0x08 /* Command active */ 108 #define TWE_CCB_PARAM 0x10 /* For parameter retrieval */ 109 #define TWE_CCB_ALLOCED 0x20 /* CCB allocated */ 110 111 struct twe_attach_args { 112 int twea_unit; 113 }; 114 115 #define tweacf_unit cf_loc[TWECF_UNIT] 116 117 int twe_ccb_alloc(struct twe_softc *, struct twe_ccb **, int); 118 void twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb); 119 void twe_ccb_free(struct twe_softc *sc, struct twe_ccb *); 120 int twe_ccb_map(struct twe_softc *, struct twe_ccb *); 121 int twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int); 122 int twe_ccb_submit(struct twe_softc *, struct twe_ccb *); 123 void twe_ccb_unmap(struct twe_softc *, struct twe_ccb *); 124 125 int twe_param_get(struct twe_softc *, int, int, size_t, 126 void (*)(struct twe_ccb *, int), struct twe_param **); 127 int twe_param_get_1(struct twe_softc *, int, int, uint8_t *); 128 int twe_param_get_2(struct twe_softc *, int, int, uint16_t *); 129 int twe_param_get_4(struct twe_softc *, int, int, uint32_t *); 130 131 static __inline__ size_t twe_get_maxsegs(void) { 132 size_t max_segs = ((MAXPHYS + PAGE_SIZE - 1) / PAGE_SIZE) + 1; 133 #ifdef TWE_SG_SIZE 134 if (TWE_SG_SIZE < max_segs) 135 max_segs = TWE_SG_SIZE; 136 #endif 137 return max_segs; 138 } 139 140 static __inline__ size_t twe_get_maxxfer(size_t maxsegs) { 141 return (maxsegs - 1) * PAGE_SIZE; 142 } 143 144 /* 145 * Structures used to convert numeric codes to strings. 146 */ 147 struct twe_code_table { 148 uint32_t code; 149 const char *string; 150 }; 151 extern const struct twe_code_table twe_table_status[]; 152 extern const struct twe_code_table twe_table_unitstate[]; 153 extern const struct twe_code_table twe_table_unittype[]; 154 extern const struct twe_code_table twe_table_stripedepth[]; 155 extern const struct twe_code_table twe_table_aen[]; 156 157 const char *twe_describe_code(const struct twe_code_table *, uint32_t); 158 159 #endif /* !_PCI_TWEVAR_H_ */ 160
Indexes created Tue Sep 23 02:09:52 GMT 2025