4 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
6 * This code is derived from software contributed to The DragonFly Project
7 * by Matthew Dillon <dillon@backplane.com>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
19 * 3. Neither the name of The DragonFly Project nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific, prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
27 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
29 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
31 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * Primary device and CAM interface to OpenBSD AHCI driver, for DragonFly
42 u_int32_t AhciForceGen1 = 0;
43 u_int32_t AhciNoFeatures = 0;
49 static int ahci_probe (device_t dev);
50 static int ahci_attach (device_t dev);
51 static int ahci_detach (device_t dev);
52 static int ahci_sysctl_link_pwr_mgmt (SYSCTL_HANDLER_ARGS);
54 static int ahci_shutdown (device_t dev);
55 static int ahci_suspend (device_t dev);
56 static int ahci_resume (device_t dev);
59 static void ahci_port_thread(void *arg);
61 static device_method_t ahci_methods[] = {
62 DEVMETHOD(device_probe, ahci_probe),
63 DEVMETHOD(device_attach, ahci_attach),
64 DEVMETHOD(device_detach, ahci_detach),
66 DEVMETHOD(device_shutdown, ahci_shutdown),
67 DEVMETHOD(device_suspend, ahci_suspend),
68 DEVMETHOD(device_resume, ahci_resume),
71 DEVMETHOD(bus_print_child, bus_generic_print_child),
72 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
76 static devclass_t ahci_devclass;
78 static driver_t ahci_driver = {
81 sizeof(struct ahci_softc)
84 MODULE_DEPEND(ahci, cam, 1, 1, 1);
85 DRIVER_MODULE(ahci, pci, ahci_driver, ahci_devclass, 0, 0);
88 * Device bus method procedures
91 ahci_probe (device_t dev)
93 const struct ahci_device *ad;
95 if (kgetenv("hint.ahci.disabled"))
97 if (kgetenv("hint.ahci.force150"))
99 if (kgetenv("hint.ahci.nofeatures"))
102 ad = ahci_lookup_device(dev);
104 device_set_desc(dev, ad->name);
105 return(-5); /* higher priority the NATA */
111 ahci_attach (device_t dev)
113 struct ahci_softc *sc = device_get_softc(dev);
117 sc->sc_ad = ahci_lookup_device(dev);
118 if (sc->sc_ad == NULL)
121 sysctl_ctx_init(&sc->sysctl_ctx);
122 ksnprintf(name, sizeof(name), "%s%d",
123 device_get_name(dev), device_get_unit(dev));
124 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
125 SYSCTL_STATIC_CHILDREN(_hw),
126 OID_AUTO, name, CTLFLAG_RD, 0, "");
128 error = sc->sc_ad->ad_attach(dev);
130 sysctl_ctx_free(&sc->sysctl_ctx);
131 sc->sysctl_tree = NULL;
137 ahci_detach (device_t dev)
139 struct ahci_softc *sc = device_get_softc(dev);
142 if (sc->sysctl_tree) {
143 sysctl_ctx_free(&sc->sysctl_ctx);
144 sc->sysctl_tree = NULL;
147 error = sc->sc_ad->ad_detach(dev);
154 ahci_sysctl_link_pwr_mgmt (SYSCTL_HANDLER_ARGS)
156 struct ahci_port *ap = arg1;
157 int error, link_pwr_mgmt;
159 link_pwr_mgmt = ap->link_pwr_mgmt;
160 error = sysctl_handle_int(oidp, &link_pwr_mgmt, 0, req);
161 if (error || req->newptr == NULL)
164 ahci_port_link_pwr_mgmt(ap, link_pwr_mgmt);
169 ahci_sysctl_link_pwr_state (SYSCTL_HANDLER_ARGS)
171 struct ahci_port *ap = arg1;
172 const char *state_names[] = {"unknown", "active", "partial", "slumber"};
176 state = ahci_port_link_pwr_state(ap);
177 if (state < 0 || state >= sizeof(state_names) / sizeof(state_names[0]))
180 ksnprintf(buf, sizeof(buf), "%s", state_names[state]);
181 return sysctl_handle_string(oidp, buf, sizeof(buf), req);
187 ahci_shutdown (device_t dev)
193 ahci_suspend (device_t dev)
199 ahci_resume (device_t dev)
207 * Sleep (ms) milliseconds, error on the side of caution.
210 ahci_os_sleep(int ms)
214 ticks = hz * ms / 1000 + 1;
215 tsleep(&ticks, 0, "ahslp", ticks);
219 * Sleep for a minimum interval and return the number of milliseconds
220 * that was. The minimum value returned is 1
223 ahci_os_softsleep(void)
226 tsleep(&ticks, 0, "ahslp", hz / 1000);
229 tsleep(&ticks, 0, "ahslp", 1);
235 ahci_os_hardsleep(int us)
241 * Create the OS-specific port helper thread and per-port lock.
244 ahci_os_start_port(struct ahci_port *ap)
248 atomic_set_int(&ap->ap_signal, AP_SIGF_INIT | AP_SIGF_THREAD_SYNC);
249 lockinit(&ap->ap_lock, "ahcipo", 0, 0);
250 lockinit(&ap->ap_sim_lock, "ahcicam", 0, LK_CANRECURSE);
251 lockinit(&ap->ap_sig_lock, "ahport", 0, 0);
252 sysctl_ctx_init(&ap->sysctl_ctx);
253 ksnprintf(name, sizeof(name), "%d", ap->ap_num);
254 ap->sysctl_tree = SYSCTL_ADD_NODE(&ap->sysctl_ctx,
255 SYSCTL_CHILDREN(ap->ap_sc->sysctl_tree),
256 OID_AUTO, name, CTLFLAG_RD, 0, "");
258 if ((ap->ap_sc->sc_cap & AHCI_REG_CAP_SALP) &&
259 (ap->ap_sc->sc_cap & (AHCI_REG_CAP_PSC | AHCI_REG_CAP_SSC))) {
260 SYSCTL_ADD_PROC(&ap->sysctl_ctx,
261 SYSCTL_CHILDREN(ap->sysctl_tree), OID_AUTO,
262 "link_pwr_mgmt", CTLTYPE_INT | CTLFLAG_RW, ap, 0,
263 ahci_sysctl_link_pwr_mgmt, "I",
264 "Link power management policy "
265 "(0 = disabled, 1 = medium, 2 = aggressive)");
266 SYSCTL_ADD_PROC(&ap->sysctl_ctx,
267 SYSCTL_CHILDREN(ap->sysctl_tree), OID_AUTO,
268 "link_pwr_state", CTLTYPE_STRING | CTLFLAG_RD, ap, 0,
269 ahci_sysctl_link_pwr_state, "A",
270 "Link power management state");
274 kthread_create(ahci_port_thread, ap, &ap->ap_thread,
279 * Stop the OS-specific port helper thread and kill the per-port lock.
282 ahci_os_stop_port(struct ahci_port *ap)
284 if (ap->sysctl_tree) {
285 sysctl_ctx_free(&ap->sysctl_ctx);
286 ap->sysctl_tree = NULL;
290 ahci_os_signal_port_thread(ap, AP_SIGF_STOP);
293 kprintf("%s: Waiting for thread to terminate\n",
295 while (ap->ap_thread)
297 kprintf("%s: thread terminated\n",
301 lockuninit(&ap->ap_lock);
305 * Add (mask) to the set of bits being sent to the per-port thread helper
306 * and wake the helper up if necessary.
309 ahci_os_signal_port_thread(struct ahci_port *ap, int mask)
311 lockmgr(&ap->ap_sig_lock, LK_EXCLUSIVE);
312 atomic_set_int(&ap->ap_signal, mask);
313 wakeup(&ap->ap_thread);
314 lockmgr(&ap->ap_sig_lock, LK_RELEASE);
318 * Unconditionally lock the port structure for access.
321 ahci_os_lock_port(struct ahci_port *ap)
323 lockmgr(&ap->ap_lock, LK_EXCLUSIVE);
327 * Conditionally lock the port structure for access.
329 * Returns 0 on success, non-zero on failure.
332 ahci_os_lock_port_nb(struct ahci_port *ap)
334 return (lockmgr(&ap->ap_lock, LK_EXCLUSIVE | LK_NOWAIT));
338 * Unlock a previously locked port.
341 ahci_os_unlock_port(struct ahci_port *ap)
343 lockmgr(&ap->ap_lock, LK_RELEASE);
347 * Per-port thread helper. This helper thread is responsible for
348 * atomically retrieving and clearing the signal mask and calling
349 * the machine-independant driver core.
355 ahci_port_thread(void *arg)
357 struct ahci_port *ap = arg;
361 * The helper thread is responsible for the initial port init,
362 * so all the ports can be inited in parallel.
364 * We also run the state machine which should do all probes.
365 * Since CAM is not attached yet we will not get out-of-order
368 ahci_os_lock_port(ap);
370 atomic_clear_int(&ap->ap_signal, AP_SIGF_THREAD_SYNC);
371 wakeup(&ap->ap_signal);
372 ahci_port_state_machine(ap, 1);
373 ahci_os_unlock_port(ap);
374 atomic_clear_int(&ap->ap_signal, AP_SIGF_INIT);
375 wakeup(&ap->ap_signal);
378 * Then loop on the helper core.
380 mask = ap->ap_signal;
381 while ((mask & AP_SIGF_STOP) == 0) {
382 atomic_clear_int(&ap->ap_signal, mask);
383 ahci_port_thread_core(ap, mask);
384 lockmgr(&ap->ap_sig_lock, LK_EXCLUSIVE);
385 if (ap->ap_signal == 0) {
386 lksleep(&ap->ap_thread, &ap->ap_sig_lock, 0,
389 lockmgr(&ap->ap_sig_lock, LK_RELEASE);
390 mask = ap->ap_signal;
392 ap->ap_thread = NULL;