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 SILI driver, for DragonFly
42 u_int32_t SiliForceGen1 = 0;
43 u_int32_t SiliNoFeatures = 0;
49 static int sili_probe (device_t dev);
50 static int sili_attach (device_t dev);
51 static int sili_detach (device_t dev);
53 static int sili_shutdown (device_t dev);
54 static int sili_suspend (device_t dev);
55 static int sili_resume (device_t dev);
58 static void sili_port_thread(void *arg);
60 static device_method_t sili_methods[] = {
61 DEVMETHOD(device_probe, sili_probe),
62 DEVMETHOD(device_attach, sili_attach),
63 DEVMETHOD(device_detach, sili_detach),
65 DEVMETHOD(device_shutdown, sili_shutdown),
66 DEVMETHOD(device_suspend, sili_suspend),
67 DEVMETHOD(device_resume, sili_resume),
70 DEVMETHOD(bus_print_child, bus_generic_print_child),
71 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
75 static devclass_t sili_devclass;
77 static driver_t sili_driver = {
80 sizeof(struct sili_softc)
83 MODULE_DEPEND(sili, cam, 1, 1, 1);
84 DRIVER_MODULE(sili, pci, sili_driver, sili_devclass, NULL, NULL);
87 * Device bus method procedures
90 sili_probe (device_t dev)
92 const struct sili_device *ad;
94 if (kgetenv("hint.sili.disabled"))
96 if (kgetenv("hint.sili.force150"))
98 if (kgetenv("hint.sili.nofeatures"))
101 ad = sili_lookup_device(dev);
103 device_set_desc(dev, ad->name);
104 return(-5); /* higher priority the NATA */
110 sili_attach (device_t dev)
112 struct sili_softc *sc = device_get_softc(dev);
115 sc->sc_ad = sili_lookup_device(dev);
116 if (sc->sc_ad == NULL)
118 error = sc->sc_ad->ad_attach(dev);
123 sili_detach (device_t dev)
125 struct sili_softc *sc = device_get_softc(dev);
129 error = sc->sc_ad->ad_detach(dev);
138 sili_shutdown (device_t dev)
144 sili_suspend (device_t dev)
150 sili_resume (device_t dev)
158 * Sleep (ms) milliseconds, error on the side of caution.
161 sili_os_sleep(int ms)
165 ticks = hz * ms / 1000 + 1;
166 tsleep(&ticks, 0, "ahslp", ticks);
170 * Sleep for a minimum interval and return the number of milliseconds
171 * that was. The minimum value returned is 1
174 sili_os_softsleep(void)
177 tsleep(&ticks, 0, "ahslp", hz / 1000);
180 tsleep(&ticks, 0, "ahslp", 1);
186 sili_os_hardsleep(int us)
192 * Create the OS-specific port helper thread and per-port lock.
195 sili_os_start_port(struct sili_port *ap)
197 atomic_set_int(&ap->ap_signal, AP_SIGF_INIT);
198 lockinit(&ap->ap_lock, "silipo", 0, LK_CANRECURSE);
199 lockinit(&ap->ap_sim_lock, "silicam", 0, LK_CANRECURSE);
200 lockinit(&ap->ap_sig_lock, "siport", 0, 0);
201 kthread_create(sili_port_thread, ap, &ap->ap_thread,
206 * Stop the OS-specific port helper thread and kill the per-port lock.
209 sili_os_stop_port(struct sili_port *ap)
212 sili_os_signal_port_thread(ap, AP_SIGF_STOP);
215 kprintf("%s: Waiting for thread to terminate\n",
217 while (ap->ap_thread)
219 kprintf("%s: thread terminated\n",
223 lockuninit(&ap->ap_lock);
227 * Add (mask) to the set of bits being sent to the per-port thread helper
228 * and wake the helper up if necessary.
231 sili_os_signal_port_thread(struct sili_port *ap, int mask)
233 lockmgr(&ap->ap_sig_lock, LK_EXCLUSIVE);
234 atomic_set_int(&ap->ap_signal, mask);
235 wakeup(&ap->ap_thread);
236 lockmgr(&ap->ap_sig_lock, LK_RELEASE);
240 * Unconditionally lock the port structure for access.
243 sili_os_lock_port(struct sili_port *ap)
245 lockmgr(&ap->ap_lock, LK_EXCLUSIVE);
249 * Conditionally lock the port structure for access.
251 * Returns 0 on success, non-zero on failure.
254 sili_os_lock_port_nb(struct sili_port *ap)
256 return (lockmgr(&ap->ap_lock, LK_EXCLUSIVE | LK_NOWAIT));
260 * Unlock a previously locked port.
263 sili_os_unlock_port(struct sili_port *ap)
265 lockmgr(&ap->ap_lock, LK_RELEASE);
269 * Per-port thread helper. This helper thread is responsible for
270 * atomically retrieving and clearing the signal mask and calling
271 * the machine-independant driver core.
277 sili_port_thread(void *arg)
279 struct sili_port *ap = arg;
283 * The helper thread is responsible for the initial port init,
284 * so all the ports can be inited in parallel.
286 * We also run the state machine which should do all probes.
287 * Since CAM is not attached yet we will not get out-of-order
290 sili_os_lock_port(ap);
292 sili_port_state_machine(ap, 1);
293 sili_os_unlock_port(ap);
294 atomic_clear_int(&ap->ap_signal, AP_SIGF_INIT);
295 wakeup(&ap->ap_signal);
298 * Then loop on the helper core.
300 mask = ap->ap_signal;
301 while ((mask & AP_SIGF_STOP) == 0) {
302 atomic_clear_int(&ap->ap_signal, mask);
303 sili_port_thread_core(ap, mask);
304 lockmgr(&ap->ap_sig_lock, LK_EXCLUSIVE);
305 if (ap->ap_signal == 0) {
306 lksleep(&ap->ap_thread, &ap->ap_sig_lock, 0,
309 lockmgr(&ap->ap_sig_lock, LK_RELEASE);
310 mask = ap->ap_signal;
312 ap->ap_thread = NULL;