/* * Apple Onboard Audio pmf GPIOs * * Copyright 2006 Johannes Berg * * GPL v2, can be found in COPYING. */ #include #include #include #include "../aoa.h" #define PMF_GPIO(name, bit) \ static void pmf_gpio_set_##name(struct gpio_runtime *rt, int on)\ { \ struct pmf_args args = { .count = 1, .u[0].v = !on }; \ int rc; \ \ if (unlikely(!rt)) return; \ rc = pmf_call_function(rt->node, #name "-mute", &args); \ if (rc && rc != -ENODEV) \ printk(KERN_WARNING "pmf_gpio_set_" #name \ " failed, rc: %d\n", rc); \ rt->implementation_private &= ~(1<implementation_private |= (!!on << bit); \ } \ static int pmf_gpio_get_##name(struct gpio_runtime *rt) \ { \ if (unlikely(!rt)) return 0; \ return (rt->implementation_private>>bit)&1; \ } PMF_GPIO(headphone, 0); PMF_GPIO(amp, 1); PMF_GPIO(lineout, 2); static void pmf_gpio_set_hw_reset(struct gpio_runtime *rt, int on) { struct pmf_args args = { .count = 1, .u[0].v = !!on }; int rc; if (unlikely(!rt)) return; rc = pmf_call_function(rt->node, "hw-reset", &args); if (rc) printk(KERN_WARNING "pmf_gpio_set_hw_reset" " failed, rc: %d\n", rc); } static void pmf_gpio_all_amps_off(struct gpio_runtime *rt) { int saved; if (unlikely(!rt)) return; saved = rt->implementation_private; pmf_gpio_set_headphone(rt, 0); pmf_gpio_set_amp(rt, 0); pmf_gpio_set_lineout(rt, 0); rt->implementation_private = saved; } static void pmf_gpio_all_amps_restore(struct gpio_runtime *rt) { int s; if (unlikely(!rt)) return; s = rt->implementation_private; pmf_gpio_set_headphone(rt, (s>>0)&1); pmf_gpio_set_amp(rt, (s>>1)&1); pmf_gpio_set_lineout(rt, (s>>2)&1); } static void pmf_handle_notify(struct work_struct *work) { struct gpio_notification *notif = container_of(work, struct gpio_notification, work.work); mutex_lock(¬if->mutex); if (notif->notify) notif->notify(notif->data); mutex_unlock(¬if->mutex); } static void pmf_gpio_init(struct gpio_runtime *rt) { pmf_gpio_all_amps_off(rt); rt->implementation_private = 0; INIT_DELAYED_WORK(&rt->headphone_notify.work, pmf_handle_notify); INIT_DELAYED_WORK(&rt->line_in_notify.work, pmf_handle_notify); INIT_DELAYED_WORK(&rt->line_out_notify.work, pmf_handle_notify); mutex_init(&rt->headphone_notify.mutex); mutex_init(&rt->line_in_notify.mutex); mutex_init(&rt->line_out_notify.mutex); } static void pmf_gpio_exit(struct gpio_runtime *rt) { pmf_gpio_all_amps_off(rt); rt->implementation_private = 0; if (rt->headphone_notify.gpio_private) pmf_unregister_irq_client(rt->headphone_notify.gpio_private); if (rt->line_in_notify.gpio_private) pmf_unregister_irq_client(rt->line_in_notify.gpio_private); if (rt->line_out_notify.gpio_private) pmf_unregister_irq_client(rt->line_out_notify.gpio_private); /* make sure no work is pending before freeing * all things */ cancel_delayed_work_sync(&rt->headphone_notify.work); cancel_delayed_work_sync(&rt->line_in_notify.work); cancel_delayed_work_sync(&rt->line_out_notify.work); mutex_destroy(&rt->headphone_notify.mutex); mutex_destroy(&rt->line_in_notify.mutex); mutex_destroy(&rt->line_out_notify.mutex); kfree(rt->headphone_notify.gpio_private); kfree(rt->line_in_notify.gpio_private); kfree(rt->line_out_notify.gpio_private); } static void pmf_handle_notify_irq(void *data) { struct gpio_notification *notif = data; schedule_delayed_work(¬if->work, 0); } static int pmf_set_notify(struct gpio_runtime *rt, enum notify_type type, notify_func_t notify, void *data) { struct gpio_notification *notif; notify_func_t old; struct pmf_irq_client *irq_client; char *name; int err = -EBUSY; switch (type) { case AOA_NOTIFY_HEADPHONE: notif = &rt->headphone_notify; name = "headphone-detect"; break; case AOA_NOTIFY_LINE_IN: notif = &rt->line_in_notify; name = "linein-detect"; break; case AOA_NOTIFY_LINE_OUT: notif = &rt->line_out_notify; name = "lineout-detect"; break; default: return -EINVAL; } mutex_lock(¬if->mutex); old = notif->notify; if (!old && !notify) { err = 0; goto out_unlock; } if (old && notify) { if (old == notify && notif->data == data) err = 0; goto out_unlock; } if (old && !notify) { irq_client = notif->gpio_private; pmf_unregister_irq_client(irq_client); kfree(irq_client); notif->gpio_private = NULL; } if (!old && notify) { irq_client = kzalloc(sizeof(struct pmf_irq_client), GFP_KERNEL); if (!irq_client) { err = -ENOMEM; goto out_unlock; } irq_client->data = notif; irq_client->handler = pmf_handle_notify_irq; irq_client->owner = THIS_MODULE; err = pmf_register_irq_client(rt->node, name, irq_client); if (err) { printk(KERN_ERR "snd-aoa: gpio layer failed to" " register %s irq (%d)\n", name, err); kfree(irq_client); goto out_unlock; } notif->gpio_private = irq_client; } notif->notify = notify; notif->data = data; err = 0; out_unlock: mutex_unlock(¬if->mutex); return err; } static int pmf_get_detect(struct gpio_runtime *rt, enum notify_type type) { char *name; int err = -EBUSY, ret; struct pmf_args args = { .count = 1, .u[0].p = &ret }; switch (type) { case AOA_NOTIFY_HEADPHONE: name = "headphone-detect"; break; case AOA_NOTIFY_LINE_IN: name = "linein-detect"; break; case AOA_NOTIFY_LINE_OUT: name = "lineout-detect"; break; default: return -EINVAL; } err = pmf_call_function(rt->node, name, &args); if (err) return err; return ret; } static struct gpio_methods methods = { .init = pmf_gpio_init, .exit = pmf_gpio_exit, .all_amps_off = pmf_gpio_all_amps_off, .all_amps_restore = pmf_gpio_all_amps_restore, .set_headphone = pmf_gpio_set_headphone, .set_speakers = pmf_gpio_set_amp, .set_lineout = pmf_gpio_set_lineout, .set_hw_reset = pmf_gpio_set_hw_reset, .get_headphone = pmf_gpio_get_headphone, .get_speakers = pmf_gpio_get_amp, .get_lineout = pmf_gpio_get_lineout, .set_notify = pmf_set_notify, .get_detect = pmf_get_detect, }; struct gpio_methods *pmf_gpio_methods = &methods; EXPORT_SYMBOL_GPL(pmf_gpio_methods); some race condition where the object is going away at shutdown time, since both times happened when shutting down the X server. The call chains were different: - VT ioctl(KDSETMODE, KD_TEXT): intel_cleanup_plane_fb+0x5b/0xa0 [i915] drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper] intel_atomic_commit_tail+0x749/0xfe0 [i915] intel_atomic_commit+0x3cb/0x4f0 [i915] drm_atomic_commit+0x4b/0x50 [drm] restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper] drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/virtio/vhost_test')