Line data Source code
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_FUNCS 0x08
43 : #define DEBUG_PROBE 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_SIZE 512
55 :
56 : /* Get the disk's parameters */
57 : int
58 0 : ata_get_params(struct ata_drive_datas *drvp, u_int8_t flags,
59 : struct ataparams *prms)
60 : {
61 : char *tb;
62 0 : 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 0 : bzero(&wdc_c, sizeof(struct wdc_command));
70 :
71 0 : if (drvp->drive_flags & DRIVE_ATA) {
72 0 : wdc_c.r_command = WDCC_IDENTIFY;
73 0 : wdc_c.r_st_bmask = WDCS_DRDY;
74 0 : wdc_c.r_st_pmask = 0;
75 0 : wdc_c.timeout = 3000; /* 3s */
76 0 : } else if (drvp->drive_flags & DRIVE_ATAPI) {
77 0 : wdc_c.r_command = ATAPI_IDENTIFY_DEVICE;
78 0 : wdc_c.r_st_bmask = 0;
79 0 : wdc_c.r_st_pmask = 0;
80 0 : wdc_c.timeout = 10000; /* 10s */
81 : } else {
82 : WDCDEBUG_PRINT(("ata_get_params: no disks\n"),
83 : DEBUG_FUNCS|DEBUG_PROBE);
84 0 : return CMD_ERR;
85 : }
86 :
87 0 : tb = dma_alloc(ATAPARAMS_SIZE, PR_NOWAIT | PR_ZERO);
88 0 : if (tb == NULL)
89 0 : return CMD_AGAIN;
90 0 : wdc_c.flags = AT_READ | flags;
91 0 : wdc_c.data = tb;
92 0 : wdc_c.bcount = ATAPARAMS_SIZE;
93 :
94 0 : if ((ret = wdc_exec_command(drvp, &wdc_c)) != WDC_COMPLETE) {
95 : WDCDEBUG_PRINT(("%s: wdc_exec_command failed: %d\n",
96 : __func__, ret), DEBUG_PROBE);
97 0 : dma_free(tb, ATAPARAMS_SIZE);
98 0 : return CMD_AGAIN;
99 : }
100 :
101 0 : if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
102 : WDCDEBUG_PRINT(("%s: IDENTIFY failed: 0x%x\n", __func__,
103 : wdc_c.flags), DEBUG_PROBE);
104 :
105 0 : dma_free(tb, ATAPARAMS_SIZE);
106 0 : return CMD_ERR;
107 : } else {
108 : #if BYTE_ORDER == BIG_ENDIAN
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);
120 : swap16_multi((u_int16_t *)tb + 20, 3);
121 : swap16_multi((u_int16_t *)tb + 47, ATAPARAMS_SIZE / 2 - 47);
122 : #endif
123 : /* Read in parameter block. */
124 0 : 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 0 : if ((prms->atap_config & WDC_CFG_ATAPI_MASK) ==
131 0 : WDC_CFG_ATAPI &&
132 0 : ((prms->atap_model[0] == 'N' &&
133 0 : prms->atap_model[1] == 'E') ||
134 0 : (prms->atap_model[0] == 'F' &&
135 0 : prms->atap_model[1] == 'X'))) {
136 0 : dma_free(tb, ATAPARAMS_SIZE);
137 0 : return CMD_OK;
138 : }
139 0 : for (i = 0; i < sizeof(prms->atap_model); i += 2) {
140 0 : p = (u_short *)(prms->atap_model + i);
141 0 : *p = swap16(*p);
142 : }
143 0 : for (i = 0; i < sizeof(prms->atap_serial); i += 2) {
144 0 : p = (u_short *)(prms->atap_serial + i);
145 0 : *p = swap16(*p);
146 : }
147 0 : for (i = 0; i < sizeof(prms->atap_revision); i += 2) {
148 0 : p = (u_short *)(prms->atap_revision + i);
149 0 : *p = swap16(*p);
150 : }
151 :
152 0 : dma_free(tb, ATAPARAMS_SIZE);
153 0 : return CMD_OK;
154 : }
155 0 : }
156 :
157 : int
158 0 : ata_set_mode(struct ata_drive_datas *drvp, u_int8_t mode, u_int8_t flags)
159 : {
160 0 : 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 0 : bzero(&wdc_c, sizeof(struct wdc_command));
166 :
167 0 : wdc_c.r_command = SET_FEATURES;
168 0 : wdc_c.r_st_bmask = 0;
169 0 : wdc_c.r_st_pmask = 0;
170 0 : wdc_c.r_features = WDSF_SET_MODE;
171 0 : wdc_c.r_count = mode;
172 0 : wdc_c.flags = flags;
173 0 : wdc_c.timeout = 1000; /* 1s */
174 0 : if (wdc_exec_command(drvp, &wdc_c) != WDC_COMPLETE)
175 0 : return CMD_AGAIN;
176 :
177 : WDCDEBUG_PRINT(("%s: after wdc_exec_command() wdc_c.flags=0x%x\n",
178 : __func__, wdc_c.flags), DEBUG_PROBE);
179 :
180 0 : if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
181 0 : return CMD_ERR;
182 : }
183 0 : return CMD_OK;
184 0 : }
185 :
186 : void
187 0 : 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 0 : drvp->n_dmaerrs++;
197 0 : if (drvp->n_dmaerrs >= NERRS_MAX && drvp->n_xfers <= NXFER) {
198 0 : wdc_downgrade_mode(drvp);
199 0 : drvp->n_dmaerrs = NERRS_MAX-1;
200 0 : drvp->n_xfers = 0;
201 0 : return;
202 : }
203 0 : if (drvp->n_xfers > NXFER) {
204 0 : drvp->n_dmaerrs = 1; /* just got an error */
205 0 : drvp->n_xfers = 1; /* restart counting from this error */
206 0 : }
207 0 : }
208 :
209 : void
210 0 : 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 0 : if (drvp->ata_vers >= 4)
226 0 : errstr = errstr4_5;
227 : else
228 : errstr = errstr0_3;
229 :
230 0 : if (errno == 0) {
231 0 : snprintf(buf, buf_len, "error not notified");
232 0 : }
233 :
234 0 : for (i = 0; i < 8; i++) {
235 0 : if (errno & (1 << i)) {
236 0 : snprintf(buf + len, buf_len - len, "%s%s", sep,
237 0 : errstr[i]);
238 0 : len = strlen(buf);
239 : sep = ", ";
240 0 : }
241 : }
242 0 : }
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