2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
35 * Primary device and CAM interface to OpenBSD AHCI driver, for DragonFly
44 static int ahci_probe (device_t dev);
45 static int ahci_attach (device_t dev);
46 static int ahci_detach (device_t dev);
48 static int ahci_shutdown (device_t dev);
49 static int ahci_suspend (device_t dev);
50 static int ahci_resume (device_t dev);
53 static void ahci_port_thread(void *arg);
55 static device_method_t ahci_methods[] = {
56 DEVMETHOD(device_probe, ahci_probe),
57 DEVMETHOD(device_attach, ahci_attach),
58 DEVMETHOD(device_detach, ahci_detach),
60 DEVMETHOD(device_shutdown, ahci_shutdown),
61 DEVMETHOD(device_suspend, ahci_suspend),
62 DEVMETHOD(device_resume, ahci_resume),
65 DEVMETHOD(bus_print_child, bus_generic_print_child),
66 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
70 static devclass_t ahci_devclass;
72 static driver_t ahci_driver = {
75 sizeof(struct ahci_softc)
78 MODULE_DEPEND(ahci, cam, 1, 1, 1);
79 DRIVER_MODULE(ahci, pci, ahci_driver, ahci_devclass, 0, 0);
82 * Device bus method procedures
85 ahci_probe (device_t dev)
87 const struct ahci_device *ad;
89 ad = ahci_lookup_device(dev);
91 device_set_desc(dev, ad->name);
92 return(-5); /* higher priority the NATA */
98 ahci_attach (device_t dev)
100 struct ahci_softc *sc = device_get_softc(dev);
103 sc->sc_ad = ahci_lookup_device(dev);
104 if (sc->sc_ad == NULL)
106 error = sc->sc_ad->ad_attach(dev);
111 ahci_detach (device_t dev)
113 struct ahci_softc *sc = device_get_softc(dev);
117 error = sc->sc_ad->ad_detach(dev);
126 ahci_shutdown (device_t dev)
132 ahci_suspend (device_t dev)
138 ahci_resume (device_t dev)
146 * Sleep (ms) milliseconds, error on the side of caution.
149 ahci_os_sleep(int ms)
153 ticks = hz * ms / 1000 + 1;
154 tsleep(&ticks, 0, "ahslp", ticks);
158 * Sleep for a minimum interval and return the number of milliseconds
159 * that was. The minimum value returned is 1
162 ahci_os_softsleep(void)
165 tsleep(&ticks, 0, "ahslp", hz / 1000);
168 tsleep(&ticks, 0, "ahslp", 1);
174 ahci_os_hardsleep(int us)
180 * Create the OS-specific port helper thread and per-port lock.
183 ahci_os_start_port(struct ahci_port *ap)
185 atomic_set_int(&ap->ap_signal, AP_SIGF_INIT);
186 lockinit(&ap->ap_lock, "ahcipo", 0, 0);
187 kthread_create(ahci_port_thread, ap, &ap->ap_thread,
192 * Stop the OS-specific port helper thread and kill the per-port lock.
195 ahci_os_stop_port(struct ahci_port *ap)
198 ahci_os_signal_port_thread(ap, AP_SIGF_STOP);
201 kprintf("%s: Waiting for thread to terminate\n",
203 while (ap->ap_thread)
205 kprintf("%s: thread terminated\n",
209 lockuninit(&ap->ap_lock);
213 * Add (mask) to the set of bits being sent to the per-port thread helper
214 * and wake the helper up if necessary.
217 ahci_os_signal_port_thread(struct ahci_port *ap, int mask)
219 atomic_set_int(&ap->ap_signal, mask);
220 wakeup(&ap->ap_thread);
224 * Unconditionally lock the port structure for access.
227 ahci_os_lock_port(struct ahci_port *ap)
229 lockmgr(&ap->ap_lock, LK_EXCLUSIVE);
233 * Conditionally lock the port structure for access.
235 * Returns 0 on success, non-zero on failure.
238 ahci_os_lock_port_nb(struct ahci_port *ap)
240 return (lockmgr(&ap->ap_lock, LK_EXCLUSIVE | LK_NOWAIT));
244 * Unlock a previously locked port.
247 ahci_os_unlock_port(struct ahci_port *ap)
249 lockmgr(&ap->ap_lock, LK_RELEASE);
253 * Per-port thread helper. This helper thread is responsible for
254 * atomically retrieving and clearing the signal mask and calling
255 * the machine-independant driver core.
259 ahci_port_thread(void *arg)
261 struct ahci_port *ap = arg;
265 * The helper thread is responsible for the initial port init,
266 * so all the ports can be inited in parallel.
268 * We also run the state machine which should do all probes.
269 * Since CAM is not attached yet we will not get out-of-order
272 ahci_os_lock_port(ap);
273 ahci_port_init(ap, NULL);
274 ahci_port_state_machine(ap, 1);
275 ahci_os_unlock_port(ap);
276 atomic_clear_int(&ap->ap_signal, AP_SIGF_INIT);
277 wakeup(&ap->ap_signal);
280 * Then loop on the helper core.
282 mask = ap->ap_signal;
283 while ((mask & AP_SIGF_STOP) == 0) {
284 atomic_clear_int(&ap->ap_signal, mask);
285 ahci_port_thread_core(ap, mask);
287 tsleep_interlock(&ap->ap_thread);
288 if (ap->ap_signal == 0)
289 tsleep(&ap->ap_thread, 0, "ahport", 0);
291 mask = ap->ap_signal;
293 ap->ap_thread = NULL;