Annotation of sys/dev/ata/ata.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ata.c,v 1.28 2007/04/08 14:20:26 pedro 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: * 3. All advertising materials mentioning features or use of this software
15: * must display the following acknowledgement:
16: * This product includes software developed by Manuel Bouyer.
17: * 4. The name of the author may not be used to endorse or promote products
18: * derived from this software without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30: */
31:
32: #include <sys/param.h>
33: #include <sys/systm.h>
34: #include <sys/kernel.h>
35: #include <sys/file.h>
36: #include <sys/stat.h>
37: #include <sys/malloc.h>
38: #include <sys/device.h>
39: #include <sys/syslog.h>
40:
41: #include <machine/bus.h>
42:
43: #include <dev/ata/atareg.h>
44: #include <dev/ata/atavar.h>
45: #include <dev/ic/wdcreg.h>
46: #include <dev/ic/wdcvar.h>
47:
48: #define DEBUG_FUNCS 0x08
49: #define DEBUG_PROBE 0x10
50: #ifdef WDCDEBUG
51: extern int wdcdebug_mask; /* init'ed in wdc.c */
52: #define WDCDEBUG_PRINT(args, level) do { \
53: if ((wdcdebug_mask & (level)) != 0) \
54: printf args; \
55: } while (0)
56: #else
57: #define WDCDEBUG_PRINT(args, level)
58: #endif
59:
60: #define ATAPARAMS_SIZE 512
61:
62: /* Get the disk's parameters */
63: int
64: ata_get_params(struct ata_drive_datas *drvp, u_int8_t flags,
65: struct ataparams *prms)
66: {
67: char tb[ATAPARAMS_SIZE];
68: struct wdc_command wdc_c;
69: int i;
70: u_int16_t *p;
71: int ret;
72:
73: WDCDEBUG_PRINT(("ata_get_parms\n"), DEBUG_FUNCS);
74:
75: bzero(tb, sizeof(tb));
76: bzero(&wdc_c, sizeof(struct wdc_command));
77:
78: if (drvp->drive_flags & DRIVE_ATA) {
79: wdc_c.r_command = WDCC_IDENTIFY;
80: wdc_c.r_st_bmask = WDCS_DRDY;
81: wdc_c.r_st_pmask = 0;
82: wdc_c.timeout = 3000; /* 3s */
83: } else if (drvp->drive_flags & DRIVE_ATAPI) {
84: wdc_c.r_command = ATAPI_IDENTIFY_DEVICE;
85: wdc_c.r_st_bmask = 0;
86: wdc_c.r_st_pmask = 0;
87: wdc_c.timeout = 10000; /* 10s */
88: } else {
89: WDCDEBUG_PRINT(("wdc_ata_get_parms: no disks\n"),
90: DEBUG_FUNCS|DEBUG_PROBE);
91: return CMD_ERR;
92: }
93: wdc_c.flags = AT_READ | flags;
94: wdc_c.data = tb;
95: wdc_c.bcount = ATAPARAMS_SIZE;
96:
97: if ((ret = wdc_exec_command(drvp, &wdc_c)) != WDC_COMPLETE) {
98: WDCDEBUG_PRINT(("%s: wdc_exec_command failed: %d\n",
99: __func__, ret), DEBUG_PROBE);
100: return CMD_AGAIN;
101: }
102:
103: if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
104: WDCDEBUG_PRINT(("%s: IDENTIFY failed: 0x%x\n", __func__,
105: wdc_c.flags), DEBUG_PROBE);
106:
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: return CMD_OK;
138: for (i = 0; i < sizeof(prms->atap_model); i += 2) {
139: p = (u_short *)(prms->atap_model + i);
140: *p = swap16(*p);
141: }
142: for (i = 0; i < sizeof(prms->atap_serial); i += 2) {
143: p = (u_short *)(prms->atap_serial + i);
144: *p = swap16(*p);
145: }
146: for (i = 0; i < sizeof(prms->atap_revision); i += 2) {
147: p = (u_short *)(prms->atap_revision + i);
148: *p = swap16(*p);
149: }
150:
151: return CMD_OK;
152: }
153: }
154:
155: int
156: ata_set_mode(struct ata_drive_datas *drvp, u_int8_t mode, u_int8_t flags)
157: {
158: struct wdc_command wdc_c;
159:
160: WDCDEBUG_PRINT(("%s: mode=0x%x, flags=0x%x\n", __func__,
161: mode, flags), DEBUG_PROBE);
162:
163: bzero(&wdc_c, sizeof(struct wdc_command));
164:
165: wdc_c.r_command = SET_FEATURES;
166: wdc_c.r_st_bmask = 0;
167: wdc_c.r_st_pmask = 0;
168: wdc_c.r_precomp = WDSF_SET_MODE;
169: wdc_c.r_count = mode;
170: wdc_c.flags = flags;
171: wdc_c.timeout = 1000; /* 1s */
172: if (wdc_exec_command(drvp, &wdc_c) != WDC_COMPLETE)
173: return CMD_AGAIN;
174:
175: WDCDEBUG_PRINT(("%s: after wdc_exec_command() wdc_c.flags=0x%x\n",
176: __func__, wdc_c.flags), DEBUG_PROBE);
177:
178: if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
179: return CMD_ERR;
180: }
181: return CMD_OK;
182: }
183:
184: void
185: ata_dmaerr(struct ata_drive_datas *drvp)
186: {
187: /*
188: * Downgrade decision: if we get NERRS_MAX in NXFER.
189: * We start with n_dmaerrs set to NERRS_MAX-1 so that the
190: * first error within the first NXFER ops will immediately trigger
191: * a downgrade.
192: * If we got an error and n_xfers is bigger than NXFER reset counters.
193: */
194: drvp->n_dmaerrs++;
195: if (drvp->n_dmaerrs >= NERRS_MAX && drvp->n_xfers <= NXFER) {
196: wdc_downgrade_mode(drvp);
197: drvp->n_dmaerrs = NERRS_MAX-1;
198: drvp->n_xfers = 0;
199: return;
200: }
201: if (drvp->n_xfers > NXFER) {
202: drvp->n_dmaerrs = 1; /* just got an error */
203: drvp->n_xfers = 1; /* restart counting from this error */
204: }
205: }
206:
207: void
208: ata_perror(struct ata_drive_datas *drvp, int errno, char *buf, size_t buf_len)
209: {
210: static char *errstr0_3[] = {"address mark not found",
211: "track 0 not found", "aborted command", "media change requested",
212: "id not found", "media changed", "uncorrectable data error",
213: "bad block detected"};
214: static char *errstr4_5[] = {"",
215: "no media/write protected", "aborted command",
216: "media change requested", "id not found", "media changed",
217: "uncorrectable data error", "interface CRC error"};
218: char **errstr;
219: int i;
220: char *sep = "";
221: size_t len = 0;
222:
223: if (drvp->ata_vers >= 4)
224: errstr = errstr4_5;
225: else
226: errstr = errstr0_3;
227:
228: if (errno == 0) {
229: snprintf(buf, buf_len, "error not notified");
230: }
231:
232: for (i = 0; i < 8; i++) {
233: if (errno & (1 << i)) {
234: snprintf(buf + len, buf_len - len, "%s%s", sep,
235: errstr[i]);
236: len = strlen(buf);
237: sep = ", ";
238: }
239: }
240: }
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