| File: | dev/ata/ata.c |
| Warning: | line 94, column 7 Although the value stored to 'ret' is used in the enclosing expression, the value is never actually read from 'ret' |
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| 1 | /* $OpenBSD: ata.c,v 1.36 2017/12/30 20:46:59 guenther 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/stat.h> |
| 31 | #include <sys/malloc.h> |
| 32 | #include <sys/device.h> |
| 33 | #include <sys/syslog.h> |
| 34 | #include <sys/pool.h> |
| 35 | |
| 36 | #include <machine/bus.h> |
| 37 | |
| 38 | #include <dev/ata/atareg.h> |
| 39 | #include <dev/ata/atavar.h> |
| 40 | #include <dev/ic/wdcreg.h> |
| 41 | |
| 42 | #define DEBUG_FUNCS0x08 0x08 |
| 43 | #define DEBUG_PROBE0x10 0x10 |
| 44 | #ifdef WDCDEBUG |
| 45 | extern int wdcdebug_mask; /* init'ed in wdc.c */ |
| 46 | #define WDCDEBUG_PRINT(args, level) do { \ |
| 47 | if ((wdcdebug_mask & (level)) != 0) \ |
| 48 | printf args; \ |
| 49 | } while (0) |
| 50 | #else |
| 51 | #define WDCDEBUG_PRINT(args, level) |
| 52 | #endif |
| 53 | |
| 54 | #define ATAPARAMS_SIZE512 512 |
| 55 | |
| 56 | /* Get the disk's parameters */ |
| 57 | int |
| 58 | ata_get_params(struct ata_drive_datas *drvp, u_int8_t flags, |
| 59 | struct ataparams *prms) |
| 60 | { |
| 61 | char *tb; |
| 62 | struct wdc_command wdc_c; |
| 63 | int i; |
| 64 | u_int16_t *p; |
| 65 | int ret; |
| 66 | |
| 67 | WDCDEBUG_PRINT(("ata_get_params\n"), DEBUG_FUNCS); |
| 68 | |
| 69 | bzero(&wdc_c, sizeof(struct wdc_command))__builtin_bzero((&wdc_c), (sizeof(struct wdc_command))); |
| 70 | |
| 71 | if (drvp->drive_flags & DRIVE_ATA0x0001) { |
| 72 | wdc_c.r_command = WDCC_IDENTIFY0xec; |
| 73 | wdc_c.r_st_bmask = WDCS_DRDY0x40; |
| 74 | wdc_c.r_st_pmask = 0; |
| 75 | wdc_c.timeout = 3000; /* 3s */ |
| 76 | } else if (drvp->drive_flags & DRIVE_ATAPI0x0002) { |
| 77 | wdc_c.r_command = ATAPI_IDENTIFY_DEVICE0xa1; |
| 78 | wdc_c.r_st_bmask = 0; |
| 79 | wdc_c.r_st_pmask = 0; |
| 80 | wdc_c.timeout = 10000; /* 10s */ |
| 81 | } else { |
| 82 | WDCDEBUG_PRINT(("ata_get_params: no disks\n"), |
| 83 | DEBUG_FUNCS|DEBUG_PROBE); |
| 84 | return CMD_ERR1; |
| 85 | } |
| 86 | |
| 87 | tb = dma_alloc(ATAPARAMS_SIZE512, PR_NOWAIT0x0002 | PR_ZERO0x0008); |
| 88 | if (tb == NULL((void *)0)) |
| 89 | return CMD_AGAIN2; |
| 90 | wdc_c.flags = AT_READ0x0001 | flags; |
| 91 | wdc_c.data = tb; |
| 92 | wdc_c.bcount = ATAPARAMS_SIZE512; |
| 93 | |
| 94 | if ((ret = wdc_exec_command(drvp, &wdc_c)) != WDC_COMPLETE0x01) { |
Although the value stored to 'ret' is used in the enclosing expression, the value is never actually read from 'ret' | |
| 95 | WDCDEBUG_PRINT(("%s: wdc_exec_command failed: %d\n", |
| 96 | __func__, ret), DEBUG_PROBE); |
| 97 | dma_free(tb, ATAPARAMS_SIZE512); |
| 98 | return CMD_AGAIN2; |
| 99 | } |
| 100 | |
| 101 | if (wdc_c.flags & (AT_ERROR0x0040 | AT_TIMEOU0x0080 | AT_DF0x0100)) { |
| 102 | WDCDEBUG_PRINT(("%s: IDENTIFY failed: 0x%x\n", __func__, |
| 103 | wdc_c.flags), DEBUG_PROBE); |
| 104 | |
| 105 | dma_free(tb, ATAPARAMS_SIZE512); |
| 106 | return CMD_ERR1; |
| 107 | } else { |
| 108 | #if BYTE_ORDER1234 == BIG_ENDIAN4321 |
| 109 | /* All the fields in the params structure are 16-bit |
| 110 | integers except for the ID strings which are char |
| 111 | strings. The 16-bit integers are currently in |
| 112 | memory in little-endian, regardless of architecture. |
| 113 | So, they need to be swapped on big-endian architectures |
| 114 | before they are accessed through the ataparams structure. |
| 115 | |
| 116 | The swaps below avoid touching the char strings. |
| 117 | */ |
| 118 | |
| 119 | swap16_multi((u_int16_t *)tb, 10)do { __size_t __swap16_multi_n = (10); __uint16_t *__swap16_multi_v = ((u_int16_t *)tb); while (__swap16_multi_n) { *__swap16_multi_v = (__uint16_t)(__builtin_constant_p(*__swap16_multi_v) ? (__uint16_t )(((__uint16_t)(*__swap16_multi_v) & 0xffU) << 8 | ( (__uint16_t)(*__swap16_multi_v) & 0xff00U) >> 8) : __swap16md (*__swap16_multi_v)); __swap16_multi_v++; __swap16_multi_n--; } } while (0); |
| 120 | swap16_multi((u_int16_t *)tb + 20, 3)do { __size_t __swap16_multi_n = (3); __uint16_t *__swap16_multi_v = ((u_int16_t *)tb + 20); while (__swap16_multi_n) { *__swap16_multi_v = (__uint16_t)(__builtin_constant_p(*__swap16_multi_v) ? (__uint16_t )(((__uint16_t)(*__swap16_multi_v) & 0xffU) << 8 | ( (__uint16_t)(*__swap16_multi_v) & 0xff00U) >> 8) : __swap16md (*__swap16_multi_v)); __swap16_multi_v++; __swap16_multi_n--; } } while (0); |
| 121 | swap16_multi((u_int16_t *)tb + 47, ATAPARAMS_SIZE / 2 - 47)do { __size_t __swap16_multi_n = (512 / 2 - 47); __uint16_t * __swap16_multi_v = ((u_int16_t *)tb + 47); while (__swap16_multi_n ) { *__swap16_multi_v = (__uint16_t)(__builtin_constant_p(*__swap16_multi_v ) ? (__uint16_t)(((__uint16_t)(*__swap16_multi_v) & 0xffU ) << 8 | ((__uint16_t)(*__swap16_multi_v) & 0xff00U ) >> 8) : __swap16md(*__swap16_multi_v)); __swap16_multi_v ++; __swap16_multi_n--; } } while (0); |
| 122 | #endif |
| 123 | /* Read in parameter block. */ |
| 124 | bcopy(tb, prms, sizeof(struct ataparams)); |
| 125 | |
| 126 | /* |
| 127 | * Shuffle string byte order. |
| 128 | * ATAPI Mitsumi and NEC drives don't need this. |
| 129 | */ |
| 130 | if ((prms->atap_config & WDC_CFG_ATAPI_MASK0xc000) == |
| 131 | WDC_CFG_ATAPI0x8000 && |
| 132 | ((prms->atap_model[0] == 'N' && |
| 133 | prms->atap_model[1] == 'E') || |
| 134 | (prms->atap_model[0] == 'F' && |
| 135 | prms->atap_model[1] == 'X'))) { |
| 136 | dma_free(tb, ATAPARAMS_SIZE512); |
| 137 | return CMD_OK0; |
| 138 | } |
| 139 | for (i = 0; i < sizeof(prms->atap_model); i += 2) { |
| 140 | p = (u_short *)(prms->atap_model + i); |
| 141 | *p = swap16(*p)(__uint16_t)(__builtin_constant_p(*p) ? (__uint16_t)(((__uint16_t )(*p) & 0xffU) << 8 | ((__uint16_t)(*p) & 0xff00U ) >> 8) : __swap16md(*p)); |
| 142 | } |
| 143 | for (i = 0; i < sizeof(prms->atap_serial); i += 2) { |
| 144 | p = (u_short *)(prms->atap_serial + i); |
| 145 | *p = swap16(*p)(__uint16_t)(__builtin_constant_p(*p) ? (__uint16_t)(((__uint16_t )(*p) & 0xffU) << 8 | ((__uint16_t)(*p) & 0xff00U ) >> 8) : __swap16md(*p)); |
| 146 | } |
| 147 | for (i = 0; i < sizeof(prms->atap_revision); i += 2) { |
| 148 | p = (u_short *)(prms->atap_revision + i); |
| 149 | *p = swap16(*p)(__uint16_t)(__builtin_constant_p(*p) ? (__uint16_t)(((__uint16_t )(*p) & 0xffU) << 8 | ((__uint16_t)(*p) & 0xff00U ) >> 8) : __swap16md(*p)); |
| 150 | } |
| 151 | |
| 152 | dma_free(tb, ATAPARAMS_SIZE512); |
| 153 | return CMD_OK0; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | int |
| 158 | ata_set_mode(struct ata_drive_datas *drvp, u_int8_t mode, u_int8_t flags) |
| 159 | { |
| 160 | struct wdc_command wdc_c; |
| 161 | |
| 162 | WDCDEBUG_PRINT(("%s: mode=0x%x, flags=0x%x\n", __func__, |
| 163 | mode, flags), DEBUG_PROBE); |
| 164 | |
| 165 | bzero(&wdc_c, sizeof(struct wdc_command))__builtin_bzero((&wdc_c), (sizeof(struct wdc_command))); |
| 166 | |
| 167 | wdc_c.r_command = SET_FEATURES0xef; |
| 168 | wdc_c.r_st_bmask = 0; |
| 169 | wdc_c.r_st_pmask = 0; |
| 170 | wdc_c.r_features = WDSF_SET_MODE0x03; |
| 171 | wdc_c.r_count = mode; |
| 172 | wdc_c.flags = flags; |
| 173 | wdc_c.timeout = 1000; /* 1s */ |
| 174 | if (wdc_exec_command(drvp, &wdc_c) != WDC_COMPLETE0x01) |
| 175 | return CMD_AGAIN2; |
| 176 | |
| 177 | WDCDEBUG_PRINT(("%s: after wdc_exec_command() wdc_c.flags=0x%x\n", |
| 178 | __func__, wdc_c.flags), DEBUG_PROBE); |
| 179 | |
| 180 | if (wdc_c.flags & (AT_ERROR0x0040 | AT_TIMEOU0x0080 | AT_DF0x0100)) { |
| 181 | return CMD_ERR1; |
| 182 | } |
| 183 | return CMD_OK0; |
| 184 | } |
| 185 | |
| 186 | void |
| 187 | ata_dmaerr(struct ata_drive_datas *drvp) |
| 188 | { |
| 189 | /* |
| 190 | * Downgrade decision: if we get NERRS_MAX in NXFER. |
| 191 | * We start with n_dmaerrs set to NERRS_MAX-1 so that the |
| 192 | * first error within the first NXFER ops will immediately trigger |
| 193 | * a downgrade. |
| 194 | * If we got an error and n_xfers is bigger than NXFER reset counters. |
| 195 | */ |
| 196 | drvp->n_dmaerrs++; |
| 197 | if (drvp->n_dmaerrs >= NERRS_MAX4 && drvp->n_xfers <= NXFER1000) { |
| 198 | wdc_downgrade_mode(drvp); |
| 199 | drvp->n_dmaerrs = NERRS_MAX4-1; |
| 200 | drvp->n_xfers = 0; |
| 201 | return; |
| 202 | } |
| 203 | if (drvp->n_xfers > NXFER1000) { |
| 204 | drvp->n_dmaerrs = 1; /* just got an error */ |
| 205 | drvp->n_xfers = 1; /* restart counting from this error */ |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | void |
| 210 | ata_perror(struct ata_drive_datas *drvp, int errno, char *buf, size_t buf_len) |
| 211 | { |
| 212 | static char *errstr0_3[] = {"address mark not found", |
| 213 | "track 0 not found", "aborted command", "media change requested", |
| 214 | "id not found", "media changed", "uncorrectable data error", |
| 215 | "bad block detected"}; |
| 216 | static char *errstr4_5[] = {"", |
| 217 | "no media/write protected", "aborted command", |
| 218 | "media change requested", "id not found", "media changed", |
| 219 | "uncorrectable data error", "interface CRC error"}; |
| 220 | char **errstr; |
| 221 | int i; |
| 222 | char *sep = ""; |
| 223 | size_t len = 0; |
| 224 | |
| 225 | if (drvp->ata_vers >= 4) |
| 226 | errstr = errstr4_5; |
| 227 | else |
| 228 | errstr = errstr0_3; |
| 229 | |
| 230 | if (errno == 0) { |
| 231 | snprintf(buf, buf_len, "error not notified"); |
| 232 | } |
| 233 | |
| 234 | for (i = 0; i < 8; i++) { |
| 235 | if (errno & (1 << i)) { |
| 236 | snprintf(buf + len, buf_len - len, "%s%s", sep, |
| 237 | errstr[i]); |
| 238 | len = strlen(buf); |
| 239 | sep = ", "; |
| 240 | } |
| 241 | } |
| 242 | } |