1 /* $NetBSD: twevar.h,v 1.30 2012/10/27 17:18:35 chs 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _PCI_TWEVAR_H_ 33 #define _PCI_TWEVAR_H_ 34 35 #define TWE_MAX_QUEUECNT 129 36 37 /* Callbacks from controller to array. */ 38 struct twe_callbacks { 39 void (*tcb_openings)(device_t, int); 40 }; 41 42 /* Per-array drive information. */ 43 struct twe_drive { 44 uint32_t td_size; 45 uint8_t td_type; 46 uint8_t td_stripe; 47 48 device_t td_dev; 49 const struct twe_callbacks *td_callbacks; 50 }; 51 52 /* Per-controller state. */ 53 struct twe_softc { 54 device_t sc_dev; 55 bus_space_tag_t sc_iot; 56 bus_space_handle_t sc_ioh; 57 bus_dma_tag_t sc_dmat; 58 bus_dmamap_t sc_dmamap; 59 void *sc_ih; 60 void * sc_cmds; 61 bus_addr_t sc_cmds_paddr; 62 int sc_nccbs; 63 struct twe_ccb *sc_ccbs; 64 SIMPLEQ_HEAD(, twe_ccb) sc_ccb_queue; 65 SLIST_HEAD(, twe_ccb) sc_ccb_freelist; 66 int sc_flags; 67 int sc_openings; 68 int sc_nunits; 69 struct twe_drive sc_units[TWE_MAX_UNITS]; 70 71 /* Asynchronous event notification queue for management tools. */ 72 #define TWE_AEN_Q_LENGTH 256 73 uint16_t sc_aen_queue[TWE_AEN_Q_LENGTH]; 74 int sc_aen_head; 75 int sc_aen_tail; 76 }; 77 #define TWEF_OPEN 0x01 /* control device is opened */ 78 #define TWEF_AENQ_WAIT 0x02 /* someone waiting for AENs */ 79 #define TWEF_AEN 0x04 /* AEN fetch in progress */ 80 #define TWEF_WAIT_CCB 0x08 /* someone waiting for a CCB */ 81 82 /* Optional per-command context. */ 83 struct twe_context { 84 void (*tx_handler)(struct twe_ccb *, int); 85 void *tx_context; 86 device_t 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_AEN 0x10 /* For AEN retrieval */ 109 #define TWE_CCB_ALLOCED 0x20 /* CCB allocated */ 110 111 struct twe_attach_args { 112 int twea_unit; 113 }; 114 115 struct twe_ccb *twe_ccb_alloc(struct twe_softc *, int); 116 struct twe_ccb *twe_ccb_alloc_wait(struct twe_softc *, int); 117 void twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb); 118 void twe_ccb_free(struct twe_softc *sc, struct twe_ccb *); 119 int twe_ccb_map(struct twe_softc *, struct twe_ccb *); 120 int twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int); 121 int twe_ccb_submit(struct twe_softc *, struct twe_ccb *); 122 void twe_ccb_unmap(struct twe_softc *, struct twe_ccb *); 123 124 void twe_ccb_wait_handler(struct twe_ccb *, int); 125 126 int twe_param_get(struct twe_softc *, int, int, size_t, 127 void (*)(struct twe_ccb *, int), struct twe_param **); 128 int twe_param_get_1(struct twe_softc *, int, int, uint8_t *); 129 int twe_param_get_2(struct twe_softc *, int, int, uint16_t *); 130 int twe_param_get_4(struct twe_softc *, int, int, uint32_t *); 131 132 void twe_register_callbacks(struct twe_softc *, int, 133 const struct twe_callbacks *); 134 135 static __inline size_t twe_get_maxsegs(void) { 136 size_t max_segs = ((MAXPHYS + PAGE_SIZE - 1) / PAGE_SIZE) + 1; 137 #ifdef TWE_SG_SIZE 138 if (TWE_SG_SIZE < max_segs) 139 max_segs = TWE_SG_SIZE; 140 #endif 141 return max_segs; 142 } 143 144 static __inline size_t twe_get_maxxfer(size_t maxsegs) { 145 return (maxsegs - 1) * PAGE_SIZE; 146 } 147 148 /* 149 * Structures used to convert numeric codes to strings. 150 */ 151 struct twe_code_table { 152 uint32_t code; 153 const char *string; 154 }; 155 extern const struct twe_code_table twe_table_status[]; 156 extern const struct twe_code_table twe_table_unitstate[]; 157 extern const struct twe_code_table twe_table_unittype[]; 158 extern const struct twe_code_table twe_table_stripedepth[]; 159 extern const struct twe_code_table twe_table_aen[]; 160 161 const char *twe_describe_code(const struct twe_code_table *, uint32_t); 162 163 #endif /* !_PCI_TWEVAR_H_ */ 164
Indexes created Sun Sep 21 18:09:52 GMT 2025