1 /* $OpenBSD: ata.c,v 1.35 2015/08/17 15:36:29 krw Exp $ */ 2 /* $NetBSD: ata.c,v 1.9 1999/04/15 09:41:09 bouyer Exp $ */ 3 /* 4 * Copyright (c) 1998, 2001 Manuel Bouyer. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/systm.h> 29 #include <sys/kernel.h> 30 #include <sys/file.h> 31 #include <sys/stat.h> 32 #include <sys/malloc.h> 33 #include <sys/device.h> 34 #include <sys/syslog.h> 35 #include <sys/pool.h> 36 37 #include <machine/bus.h> 38 39 #include <dev/ata/atareg.h> 40 #include <dev/ata/atavar.h> 41 #include <dev/ic/wdcreg.h> 42 43 #define DEBUG_FUNCS 0x08 44 #define DEBUG_PROBE 0x10 45 #ifdef WDCDEBUG 46 extern int wdcdebug_mask; /* init'ed in wdc.c */ 47 #define WDCDEBUG_PRINT(args, level) do { \ 48 if ((wdcdebug_mask & (level)) != 0) \ 49 printf args; \ 50 } while (0) 51 #else 52 #define WDCDEBUG_PRINT(args, level) 53 #endif 54 55 #define ATAPARAMS_SIZE 512 56 57 /* Get the disk's parameters */ 58 int 59 ata_get_params(struct ata_drive_datas *drvp, u_int8_t flags, 60 struct ataparams *prms) 61 { 62 char *tb; 63 struct wdc_command wdc_c; 64 int i; 65 u_int16_t *p; 66 int ret; 67 68 WDCDEBUG_PRINT(("ata_get_params\n"), DEBUG_FUNCS); 69 70 bzero(&wdc_c, sizeof(struct wdc_command)); 71 72 if (drvp->drive_flags & DRIVE_ATA) { 73 wdc_c.r_command = WDCC_IDENTIFY; 74 wdc_c.r_st_bmask = WDCS_DRDY; 75 wdc_c.r_st_pmask = 0; 76 wdc_c.timeout = 3000; /* 3s */ 77 } else if (drvp->drive_flags & DRIVE_ATAPI) { 78 wdc_c.r_command = ATAPI_IDENTIFY_DEVICE; 79 wdc_c.r_st_bmask = 0; 80 wdc_c.r_st_pmask = 0; 81 wdc_c.timeout = 10000; /* 10s */ 82 } else { 83 WDCDEBUG_PRINT(("ata_get_params: no disks\n"), 84 DEBUG_FUNCS|DEBUG_PROBE); 85 return CMD_ERR; 86 } 87 88 tb = dma_alloc(ATAPARAMS_SIZE, PR_NOWAIT | PR_ZERO); 89 if (tb == NULL) 90 return CMD_AGAIN; 91 wdc_c.flags = AT_READ | flags; 92 wdc_c.data = tb; 93 wdc_c.bcount = ATAPARAMS_SIZE; 94 95 if ((ret = wdc_exec_command(drvp, &wdc_c)) != WDC_COMPLETE) { 96 WDCDEBUG_PRINT(("%s: wdc_exec_command failed: %d\n", 97 __func__, ret), DEBUG_PROBE); 98 dma_free(tb, ATAPARAMS_SIZE); 99 return CMD_AGAIN; 100 } 101 102 if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) { 103 WDCDEBUG_PRINT(("%s: IDENTIFY failed: 0x%x\n", __func__, 104 wdc_c.flags), DEBUG_PROBE); 105 106 dma_free(tb, ATAPARAMS_SIZE); 107 return CMD_ERR; 108 } else { 109 #if BYTE_ORDER == BIG_ENDIAN 110 /* All the fields in the params structure are 16-bit 111 integers except for the ID strings which are char 112 strings. The 16-bit integers are currently in 113 memory in little-endian, regardless of architecture. 114 So, they need to be swapped on big-endian architectures 115 before they are accessed through the ataparams structure. 116 117 The swaps below avoid touching the char strings. 118 */ 119 120 swap16_multi((u_int16_t *)tb, 10); 121 swap16_multi((u_int16_t *)tb + 20, 3); 122 swap16_multi((u_int16_t *)tb + 47, ATAPARAMS_SIZE / 2 - 47); 123 #endif 124 /* Read in parameter block. */ 125 bcopy(tb, prms, sizeof(struct ataparams)); 126 127 /* 128 * Shuffle string byte order. 129 * ATAPI Mitsumi and NEC drives don't need this. 130 */ 131 if ((prms->atap_config & WDC_CFG_ATAPI_MASK) == 132 WDC_CFG_ATAPI && 133 ((prms->atap_model[0] == 'N' && 134 prms->atap_model[1] == 'E') || 135 (prms->atap_model[0] == 'F' && 136 prms->atap_model[1] == 'X'))) { 137 dma_free(tb, ATAPARAMS_SIZE); 138 return CMD_OK; 139 } 140 for (i = 0; i < sizeof(prms->atap_model); i += 2) { 141 p = (u_short *)(prms->atap_model + i); 142 *p = swap16(*p); 143 } 144 for (i = 0; i < sizeof(prms->atap_serial); i += 2) { 145 p = (u_short *)(prms->atap_serial + i); 146 *p = swap16(*p); 147 } 148 for (i = 0; i < sizeof(prms->atap_revision); i += 2) { 149 p = (u_short *)(prms->atap_revision + i); 150 *p = swap16(*p); 151 } 152 153 dma_free(tb, ATAPARAMS_SIZE); 154 return CMD_OK; 155 } 156 } 157 158 int 159 ata_set_mode(struct ata_drive_datas *drvp, u_int8_t mode, u_int8_t flags) 160 { 161 struct wdc_command wdc_c; 162 163 WDCDEBUG_PRINT(("%s: mode=0x%x, flags=0x%x\n", __func__, 164 mode, flags), DEBUG_PROBE); 165 166 bzero(&wdc_c, sizeof(struct wdc_command)); 167 168 wdc_c.r_command = SET_FEATURES; 169 wdc_c.r_st_bmask = 0; 170 wdc_c.r_st_pmask = 0; 171 wdc_c.r_features = WDSF_SET_MODE; 172 wdc_c.r_count = mode; 173 wdc_c.flags = flags; 174 wdc_c.timeout = 1000; /* 1s */ 175 if (wdc_exec_command(drvp, &wdc_c) != WDC_COMPLETE) 176 return CMD_AGAIN; 177 178 WDCDEBUG_PRINT(("%s: after wdc_exec_command() wdc_c.flags=0x%x\n", 179 __func__, wdc_c.flags), DEBUG_PROBE); 180 181 if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) { 182 return CMD_ERR; 183 } 184 return CMD_OK; 185 } 186 187 void 188 ata_dmaerr(struct ata_drive_datas *drvp) 189 { 190 /* 191 * Downgrade decision: if we get NERRS_MAX in NXFER. 192 * We start with n_dmaerrs set to NERRS_MAX-1 so that the 193 * first error within the first NXFER ops will immediately trigger 194 * a downgrade. 195 * If we got an error and n_xfers is bigger than NXFER reset counters. 196 */ 197 drvp->n_dmaerrs++; 198 if (drvp->n_dmaerrs >= NERRS_MAX && drvp->n_xfers <= NXFER) { 199 wdc_downgrade_mode(drvp); 200 drvp->n_dmaerrs = NERRS_MAX-1; 201 drvp->n_xfers = 0; 202 return; 203 } 204 if (drvp->n_xfers > NXFER) { 205 drvp->n_dmaerrs = 1; /* just got an error */ 206 drvp->n_xfers = 1; /* restart counting from this error */ 207 } 208 } 209 210 void 211 ata_perror(struct ata_drive_datas *drvp, int errno, char *buf, size_t buf_len) 212 { 213 static char *errstr0_3[] = {"address mark not found", 214 "track 0 not found", "aborted command", "media change requested", 215 "id not found", "media changed", "uncorrectable data error", 216 "bad block detected"}; 217 static char *errstr4_5[] = {"", 218 "no media/write protected", "aborted command", 219 "media change requested", "id not found", "media changed", 220 "uncorrectable data error", "interface CRC error"}; 221 char **errstr; 222 int i; 223 char *sep = ""; 224 size_t len = 0; 225 226 if (drvp->ata_vers >= 4) 227 errstr = errstr4_5; 228 else 229 errstr = errstr0_3; 230 231 if (errno == 0) { 232 snprintf(buf, buf_len, "error not notified"); 233 } 234 235 for (i = 0; i < 8; i++) { 236 if (errno & (1 << i)) { 237 snprintf(buf + len, buf_len - len, "%s%s", sep, 238 errstr[i]); 239 len = strlen(buf); 240 sep = ", "; 241 } 242 } 243 } 244