1 /* $NetBSD: sunscpalvar.h,v 1.2 2001/04/25 17:53:34 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Matthew Fredette 5 * Copyright (c) 1995 David Jones, Gordon W. Ross 6 * Copyright (c) 1994 Jarle Greipsland 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the authors may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 4. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by 22 * David Jones and Gordon Ross 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * This file defines the interface between the machine-dependent 38 * module and the machine-indepenedent sunscpal.c module. 39 */ 40 41 /* 42 * The sun2 and sparc use real bus_space. 43 */ 44 #if defined(sun2) || defined(__sparc__) 45 # define SUNSCPAL_USE_BUS_SPACE 46 #endif 47 /* 48 * The sun2 and sparc use real bus_dma. 49 */ 50 #if defined(sun2) || defined(__sparc__) 51 #define SUNSCPAL_USE_BUS_DMA 52 #endif 53 54 /* 55 * Handy read/write macros 56 */ 57 #ifdef SUNSCPAL_USE_BUS_SPACE 58 # include <machine/bus.h> 59 /* bus_space() variety */ 60 #define SUNSCPAL_READ_1(sc, reg) bus_space_read_1(sc->sunscpal_regt, \ 61 sc->sunscpal_regh, sc->reg) 62 #define SUNSCPAL_WRITE_1(sc, reg, val) bus_space_write_1(sc->sunscpal_regt, \ 63 sc->sunscpal_regh, sc->reg, val) 64 #define SUNSCPAL_READ_2(sc, reg) bus_space_read_2(sc->sunscpal_regt, \ 65 sc->sunscpal_regh, sc->reg) 66 #define SUNSCPAL_WRITE_2(sc, reg, val) bus_space_write_2(sc->sunscpal_regt, \ 67 sc->sunscpal_regh, sc->reg, val) 68 #else 69 /* legacy memory-mapped variety */ 70 # define SUNSCPAL_READ_1(sc, reg) (*sc->reg) 71 # define SUNSCPAL_WRITE_1(sc, reg, val) do { *(sc->reg) = val; } while(0) 72 # define SUNSCPAL_READ_2 SUNSCPAL_READ_1 73 # define SUNSCPAL_WRITE_2 SUNSCPAL_WRITE_1 74 #endif 75 76 #define SUNSCPAL_CLR_INTR(sc) do { SUNSCPAL_READ_2(sc, sunscpal_dma_count); SUNSCPAL_READ_2(sc, sunscpal_icr); } while(0) 77 #define SUNSCPAL_BUSY(sc) (SUNSCPAL_READ_2(sc, sunscpal_icr) & SUNSCPAL_ICR_BUSY) 78 79 /* These are NOT artibtrary, but map to bits in sunscpal_icr */ 80 #define SUNSCPAL_PHASE_DATA_IN (SUNSCPAL_ICR_INPUT_OUTPUT) 81 #define SUNSCPAL_PHASE_DATA_OUT (0) 82 #define SUNSCPAL_PHASE_COMMAND (SUNSCPAL_ICR_COMMAND_DATA) 83 #define SUNSCPAL_PHASE_STATUS (SUNSCPAL_ICR_COMMAND_DATA | \ 84 SUNSCPAL_ICR_INPUT_OUTPUT) 85 #define SUNSCPAL_PHASE_MSG_IN (SUNSCPAL_ICR_MESSAGE | \ 86 SUNSCPAL_ICR_COMMAND_DATA | \ 87 SUNSCPAL_ICR_INPUT_OUTPUT) 88 #define SUNSCPAL_PHASE_MSG_OUT (SUNSCPAL_ICR_MESSAGE | \ 89 SUNSCPAL_ICR_COMMAND_DATA) 90 #define SUNSCPAL_PHASE_UNSPEC1 (SUNSCPAL_ICR_MESSAGE | \ 91 SUNSCPAL_ICR_INPUT_OUTPUT) 92 #define SUNSCPAL_PHASE_UNSPEC2 (SUNSCPAL_ICR_MESSAGE) 93 #define SUNSCPAL_BYTE_READ(sc, phase) (((phase) & SUNSCPAL_ICR_COMMAND_DATA) ? \ 94 SUNSCPAL_READ_1(sc, sunscpal_cmd_stat) : \ 95 SUNSCPAL_READ_1(sc, sunscpal_data)) 96 #define SUNSCPAL_BYTE_WRITE(sc, phase, b) do { \ 97 if ((phase) & SUNSCPAL_ICR_COMMAND_DATA) { \ 98 SUNSCPAL_WRITE_1(sc, sunscpal_cmd_stat, b); \ 99 } else { \ 100 SUNSCPAL_WRITE_1(sc, sunscpal_data, b); \ 101 } \ 102 } while(0) 103 /* 104 * A mask and a macro for getting the current bus phase. 105 */ 106 #define SUNSCPAL_ICR_PHASE_MASK (SUNSCPAL_ICR_MESSAGE | \ 107 SUNSCPAL_ICR_COMMAND_DATA | \ 108 SUNSCPAL_ICR_INPUT_OUTPUT) 109 #define SUNSCPAL_BUS_PHASE(icr) ((icr) & SUNSCPAL_ICR_PHASE_MASK) 110 111 /* 112 * This illegal phase is used to prevent the PAL from having 113 * a phase-match condition when we don't want one, such as 114 * when setting up the DMA engine or whatever... 115 */ 116 #define SUNSCPAL_PHASE_INVALID SUNSCPAL_PHASE_UNSPEC1 117 118 /* 119 * Transfers lager than 65535 bytes need to be split-up. 120 * (The DMA count register is only 16 bits.) 121 * Make the size an integer multiple of the page size 122 * to avoid buf/cluster remap problems. (paranoid?) 123 */ 124 #define SUNSCPAL_MAX_DMA_LEN 0xE000 125 126 #ifdef SUNSCPAL_USE_BUS_DMA 127 /* 128 * This structure is used to keep track of mapped DMA requests. 129 */ 130 struct sunscpal_dma_handle { 131 int dh_flags; 132 #define SUNSCDH_BUSY 0x01 /* This DH is in use */ 133 u_char * dh_mapaddr; /* Original data pointer */ 134 int dh_maplen; /* Original data length */ 135 bus_dmamap_t dh_dmamap; 136 #define dh_dvma dh_dmamap->dm_segs[0].ds_addr /* VA of buffer in DVMA space */ 137 }; 138 typedef struct sunscpal_dma_handle *sunscpal_dma_handle_t; 139 #else 140 typedef void *sunscpal_dma_handle_t; 141 #endif 142 143 /* Per-request state. This is required in order to support reselection. */ 144 struct sunscpal_req { 145 struct scsipi_xfer *sr_xs; /* Pointer to xfer struct, NULL=unused */ 146 int sr_target, sr_lun; /* For fast access */ 147 sunscpal_dma_handle_t sr_dma_hand; /* Current DMA handle */ 148 u_char *sr_dataptr; /* Saved data pointer */ 149 int sr_datalen; 150 int sr_flags; /* Internal error code */ 151 #define SR_IMMED 1 /* Immediate command */ 152 #define SR_OVERDUE 2 /* Timeout while not current */ 153 #define SR_ERROR 4 /* Error occurred */ 154 int sr_status; /* Status code from last cmd */ 155 }; 156 #define SUNSCPAL_OPENINGS 16 /* How many commands we can enqueue. */ 157 158 159 struct sunscpal_softc { 160 struct device sc_dev; 161 struct scsipi_adapter sc_adapter; 162 struct scsipi_channel sc_channel; 163 164 #ifdef SUNSCPAL_USE_BUS_SPACE 165 /* Pointers to bus_space */ 166 bus_space_tag_t sunscpal_regt; 167 bus_space_handle_t sunscpal_regh; 168 169 /* Pointers to PAL registers. */ 170 bus_size_t sunscpal_data; 171 bus_size_t sunscpal_cmd_stat; 172 bus_size_t sunscpal_icr; 173 bus_size_t sunscpal_dma_addr_h; 174 bus_size_t sunscpal_dma_addr_l; 175 bus_size_t sunscpal_dma_count; 176 bus_size_t sunscpal_intvec; 177 #else 178 /* Pointers to PAL registers. See sunscpalreg.h */ 179 volatile u_char *sunscpal_data; 180 volatile u_char *sunscpal_cmd_stat; 181 volatile u_short *sunscpal_icr; 182 volatile u_short *sunscpal_dma_addr_h; 183 volatile u_short *sunscpal_dma_addr_l; 184 volatile u_short *sunscpal_dma_count; 185 volatile u_char *sunscpal_intvec; 186 #endif 187 188 /* Pointers to DMA-related structures */ 189 #ifdef SUNSCPAL_USE_BUS_DMA 190 bus_dma_tag_t sunscpal_dmat; 191 #endif 192 sunscpal_dma_handle_t sc_dma_handles; 193 194 /* Functions set from MD code */ 195 #ifndef SUNSCPAL_USE_BUS_DMA 196 void (*sc_dma_alloc) __P((struct sunscpal_softc *)); 197 void (*sc_dma_free) __P((struct sunscpal_softc *)); 198 199 void (*sc_dma_setup) __P((struct sunscpal_softc *)); 200 #endif 201 202 void (*sc_intr_on) __P((struct sunscpal_softc *)); 203 void (*sc_intr_off) __P((struct sunscpal_softc *)); 204 205 int sc_flags; /* Misc. flags and capabilities */ 206 #define SUNSCPAL_FORCE_POLLING 1 /* Do not use interrupts. */ 207 #define SUNSCPAL_DISABLE_DMA 2 /* Do not use DMA. */ 208 209 /* Set bits in this to disable parity for some target. */ 210 int sc_parity_disable; 211 212 int sc_min_dma_len; /* Smaller than this is done with PIO */ 213 214 /* Begin MI shared data */ 215 216 int sc_state; 217 #define SUNSCPAL_IDLE 0 /* Ready for new work. */ 218 #define SUNSCPAL_WORKING 0x01 /* Some command is in progress. */ 219 #define SUNSCPAL_ABORTING 0x02 /* Bailing out */ 220 #define SUNSCPAL_DOINGDMA 0x04 /* The FIFO data path is active! */ 221 #define SUNSCPAL_DROP_MSGIN 0x10 /* Discard all msgs (parity err detected) */ 222 223 /* The request that has the bus now. */ 224 struct sunscpal_req *sc_current; 225 226 /* Active data pointer for current SCSI command. */ 227 u_char *sc_dataptr; 228 int sc_datalen; 229 int sc_reqlen; 230 231 /* Begin MI private data */ 232 233 /* The number of operations in progress on the bus */ 234 volatile int sc_ncmds; 235 236 /* Ring buffer of pending/active requests */ 237 struct sunscpal_req sc_ring[SUNSCPAL_OPENINGS]; 238 int sc_rr; /* Round-robin scan pointer */ 239 240 /* Active requests, by target/LUN */ 241 struct sunscpal_req *sc_matrix[8][8]; 242 243 /* Message stuff */ 244 int sc_prevphase; 245 246 u_int sc_msgpriq; /* Messages we want to send */ 247 u_int sc_msgoutq; /* Messages sent during last MESSAGE OUT */ 248 u_int sc_msgout; /* Message last transmitted */ 249 #define SEND_DEV_RESET 0x01 250 #define SEND_PARITY_ERROR 0x02 251 #define SEND_ABORT 0x04 252 #define SEND_REJECT 0x08 253 #define SEND_INIT_DET_ERR 0x10 254 #define SEND_IDENTIFY 0x20 255 #define SEND_SDTR 0x40 256 #define SEND_WDTR 0x80 257 #define SUNSCPAL_MAX_MSG_LEN 8 258 u_char sc_omess[SUNSCPAL_MAX_MSG_LEN]; 259 u_char *sc_omp; /* Outgoing message pointer */ 260 u_char sc_imess[SUNSCPAL_MAX_MSG_LEN]; 261 u_char *sc_imp; /* Incoming message pointer */ 262 int sc_rev; /* Chip revision */ 263 #define SUNSCPAL_VARIANT_501_1006 0 264 #define SUNSCPAL_VARIANT_501_1045 1 265 266 }; 267 268 void sunscpal_attach __P((struct sunscpal_softc *, int)); 269 int sunscpal_detach __P((struct sunscpal_softc *, int)); 270 int sunscpal_intr __P((void *)); 271 void sunscpal_scsipi_request __P((struct scsipi_channel *, 272 scsipi_adapter_req_t, void *)); 273 int sunscpal_pio_in __P((struct sunscpal_softc *, int, int, u_char *)); 274 int sunscpal_pio_out __P((struct sunscpal_softc *, int, int, u_char *)); 275 void sunscpal_init __P((struct sunscpal_softc *)); 276 277 /* Options for no-parity, DMA, and interrupts. */ 278 #define SUNSCPAL_OPT_NO_PARITY_CHK 0xff 279 #define SUNSCPAL_OPT_FORCE_POLLING 0x100 280 #define SUNSCPAL_OPT_DISABLE_DMA 0x200 281 282 #ifdef SUNSCPAL_DEBUG 283 struct sunscpal_softc *sunscpal_debug_sc; 284 void sunscpal_trace __P((char *msg, long val)); 285 #define SUNSCPAL_TRACE(msg, val) sunscpal_trace(msg, val) 286 #else /* SUNSCPAL_DEBUG */ 287 #define SUNSCPAL_TRACE(msg, val) /* nada */ 288 #endif /* SUNSCPAL_DEBUG */ 289