AHCI - Intel fixes, error processing fixes.
[dragonfly.git] / sys / dev / disk / ahci / ahci_dragonfly.c
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34/*
35 * Primary device and CAM interface to OpenBSD AHCI driver, for DragonFly
36 */
37
38#include "ahci.h"
39
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40u_int32_t AhciForceGen1 = 0;
41u_int32_t AhciNoFeatures = 0;
42
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43/*
44 * Device bus methods
45 */
46
47static int ahci_probe (device_t dev);
48static int ahci_attach (device_t dev);
49static int ahci_detach (device_t dev);
50#if 0
51static int ahci_shutdown (device_t dev);
52static int ahci_suspend (device_t dev);
53static int ahci_resume (device_t dev);
54#endif
55
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56static void ahci_port_thread(void *arg);
57
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58static device_method_t ahci_methods[] = {
59 DEVMETHOD(device_probe, ahci_probe),
60 DEVMETHOD(device_attach, ahci_attach),
61 DEVMETHOD(device_detach, ahci_detach),
62#if 0
63 DEVMETHOD(device_shutdown, ahci_shutdown),
64 DEVMETHOD(device_suspend, ahci_suspend),
65 DEVMETHOD(device_resume, ahci_resume),
66#endif
67
68 DEVMETHOD(bus_print_child, bus_generic_print_child),
69 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
70 {0, 0}
71};
72
73static devclass_t ahci_devclass;
74
75static driver_t ahci_driver = {
76 "ahci",
77 ahci_methods,
78 sizeof(struct ahci_softc)
79};
80
81MODULE_DEPEND(ahci, cam, 1, 1, 1);
82DRIVER_MODULE(ahci, pci, ahci_driver, ahci_devclass, 0, 0);
83
84/*
85 * Device bus method procedures
86 */
87static int
88ahci_probe (device_t dev)
89{
90 const struct ahci_device *ad;
91
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92 if (kgetenv("hint.ahci.disabled"))
93 return(ENXIO);
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94 if (kgetenv("hint.ahci.force150"))
95 AhciForceGen1 = -1;
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96 if (kgetenv("hint.ahci.nofeatures"))
97 AhciNoFeatures = -1;
c45a2365 98
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99 ad = ahci_lookup_device(dev);
100 if (ad) {
101 device_set_desc(dev, ad->name);
102 return(-5); /* higher priority the NATA */
103 }
104 return(ENXIO);
105}
106
107static int
108ahci_attach (device_t dev)
109{
110 struct ahci_softc *sc = device_get_softc(dev);
111 int error;
112
113 sc->sc_ad = ahci_lookup_device(dev);
114 if (sc->sc_ad == NULL)
115 return(ENXIO);
116 error = sc->sc_ad->ad_attach(dev);
117 return (error);
118}
119
120static int
121ahci_detach (device_t dev)
122{
123 struct ahci_softc *sc = device_get_softc(dev);
124 int error = 0;
125
126 if (sc->sc_ad) {
127 error = sc->sc_ad->ad_detach(dev);
128 sc->sc_ad = NULL;
129 }
130 return(error);
131}
132
133#if 0
134
135static int
136ahci_shutdown (device_t dev)
137{
138 return (0);
139}
140
141static int
142ahci_suspend (device_t dev)
143{
144 return (0);
145}
146
147static int
148ahci_resume (device_t dev)
149{
150 return (0);
151}
152
153#endif
3209f581 154
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155/*
156 * Sleep (ms) milliseconds, error on the side of caution.
157 */
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158void
159ahci_os_sleep(int ms)
160{
161 int ticks;
162
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163 ticks = hz * ms / 1000 + 1;
164 tsleep(&ticks, 0, "ahslp", ticks);
165}
166
167/*
168 * Sleep for a minimum interval and return the number of milliseconds
169 * that was. The minimum value returned is 1
170 */
171int
172ahci_os_softsleep(void)
173{
174 if (hz >= 1000) {
175 tsleep(&ticks, 0, "ahslp", hz / 1000);
176 return(1);
3209f581 177 } else {
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178 tsleep(&ticks, 0, "ahslp", 1);
179 return(1000 / hz);
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180 }
181}
f4553de1 182
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183void
184ahci_os_hardsleep(int us)
185{
186 DELAY(us);
187}
188
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189/*
190 * Create the OS-specific port helper thread and per-port lock.
191 */
192void
193ahci_os_start_port(struct ahci_port *ap)
194{
195 atomic_set_int(&ap->ap_signal, AP_SIGF_INIT);
196 lockinit(&ap->ap_lock, "ahcipo", 0, 0);
197 kthread_create(ahci_port_thread, ap, &ap->ap_thread,
198 "%s", PORTNAME(ap));
199}
200
201/*
202 * Stop the OS-specific port helper thread and kill the per-port lock.
203 */
204void
205ahci_os_stop_port(struct ahci_port *ap)
206{
207 if (ap->ap_thread) {
208 ahci_os_signal_port_thread(ap, AP_SIGF_STOP);
209 ahci_os_sleep(10);
210 if (ap->ap_thread) {
211 kprintf("%s: Waiting for thread to terminate\n",
212 PORTNAME(ap));
213 while (ap->ap_thread)
214 ahci_os_sleep(100);
215 kprintf("%s: thread terminated\n",
216 PORTNAME(ap));
217 }
218 }
219 lockuninit(&ap->ap_lock);
220}
221
222/*
223 * Add (mask) to the set of bits being sent to the per-port thread helper
224 * and wake the helper up if necessary.
225 */
226void
227ahci_os_signal_port_thread(struct ahci_port *ap, int mask)
228{
229 atomic_set_int(&ap->ap_signal, mask);
230 wakeup(&ap->ap_thread);
231}
232
233/*
234 * Unconditionally lock the port structure for access.
235 */
236void
237ahci_os_lock_port(struct ahci_port *ap)
238{
239 lockmgr(&ap->ap_lock, LK_EXCLUSIVE);
240}
241
242/*
243 * Conditionally lock the port structure for access.
244 *
245 * Returns 0 on success, non-zero on failure.
246 */
247int
248ahci_os_lock_port_nb(struct ahci_port *ap)
249{
250 return (lockmgr(&ap->ap_lock, LK_EXCLUSIVE | LK_NOWAIT));
251}
252
253/*
254 * Unlock a previously locked port.
255 */
256void
257ahci_os_unlock_port(struct ahci_port *ap)
258{
259 lockmgr(&ap->ap_lock, LK_RELEASE);
260}
261
262/*
263 * Per-port thread helper. This helper thread is responsible for
264 * atomically retrieving and clearing the signal mask and calling
265 * the machine-independant driver core.
266 */
267static
268void
269ahci_port_thread(void *arg)
270{
271 struct ahci_port *ap = arg;
272 int mask;
273
274 /*
275 * The helper thread is responsible for the initial port init,
276 * so all the ports can be inited in parallel.
277 *
278 * We also run the state machine which should do all probes.
279 * Since CAM is not attached yet we will not get out-of-order
280 * SCSI attachments.
281 */
282 ahci_os_lock_port(ap);
12feb904 283 ahci_port_init(ap);
831bc9e3 284 ahci_port_state_machine(ap, 1);
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285 ahci_os_unlock_port(ap);
286 atomic_clear_int(&ap->ap_signal, AP_SIGF_INIT);
287 wakeup(&ap->ap_signal);
288
289 /*
290 * Then loop on the helper core.
291 */
292 mask = ap->ap_signal;
293 while ((mask & AP_SIGF_STOP) == 0) {
294 atomic_clear_int(&ap->ap_signal, mask);
295 ahci_port_thread_core(ap, mask);
296 crit_enter();
297 tsleep_interlock(&ap->ap_thread);
298 if (ap->ap_signal == 0)
299 tsleep(&ap->ap_thread, 0, "ahport", 0);
300 crit_exit();
301 mask = ap->ap_signal;
302 }
303 ap->ap_thread = NULL;
304}