drm/radeon: use system_wq instead of dev_priv->wq

With cmwq, there's no reason for radeon to use a dedicated workqueue.
Drop dev_priv->wq and use system_wq instead.

Because radeon_driver_irq_uninstall_kms() may be called from
unsleepable context, the work items can't be flushed from there.
Instead, init and flush from radeon_irq_kms_init/fini().

While at it, simplify canceling/flushing of rdev->pm.dynpm_idle_work.
Always initialize and sync cancel instead of being unnecessarily smart
about it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Alex Deucher <alexdeucher@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 3ae63ce..eaf4fba 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2756,7 +2756,7 @@ restart_ih:
        if (wptr != rdev->ih.wptr)
                goto restart_ih;
        if (queue_hotplug)
-               queue_work(rdev->wq, &rdev->hotplug_work);
+               schedule_work(&rdev->hotplug_work);
        rdev->ih.rptr = rptr;
        WREG32(IH_RB_RPTR, rdev->ih.rptr);
        spin_unlock_irqrestore(&rdev->ih.lock, flags);

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 300b4a6..f637595 100644 (file)
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -682,7 +682,7 @@ int r100_irq_process(struct radeon_device *rdev)
        /* reset gui idle ack.  the status bit is broken */
        rdev->irq.gui_idle_acked = false;
        if (queue_hotplug)
-               queue_work(rdev->wq, &rdev->hotplug_work);
+               schedule_work(&rdev->hotplug_work);
        if (rdev->msi_enabled) {
                switch (rdev->family) {
                case CHIP_RS400:

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index f95ca5b..279794c 100644 (file)
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -3442,7 +3442,7 @@ restart_ih:
        if (wptr != rdev->ih.wptr)
                goto restart_ih;
        if (queue_hotplug)
-               queue_work(rdev->wq, &rdev->hotplug_work);
+               schedule_work(&rdev->hotplug_work);
        rdev->ih.rptr = rptr;
        WREG32(IH_RB_RPTR, rdev->ih.rptr);
        spin_unlock_irqrestore(&rdev->ih.lock, flags);

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index a835d95..aff8080 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1152,7 +1152,6 @@ struct radeon_device {
        struct r700_vram_scratch vram_scratch;
        int msi_enabled; /* msi enabled */
        struct r600_ih ih; /* r6/700 interrupt ring */
-       struct workqueue_struct *wq;
        struct work_struct hotplug_work;
        int num_crtc; /* number of crtcs */
        struct mutex dc_hw_i2c_mutex; /* display controller hw i2c mutex */

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 4ee0c53..44cf0d7 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -710,11 +710,6 @@ int radeon_device_init(struct radeon_device *rdev,
        init_waitqueue_head(&rdev->irq.vblank_queue);
        init_waitqueue_head(&rdev->irq.idle_queue);
 
-       /* setup workqueue */
-       rdev->wq = create_workqueue("radeon");
-       if (rdev->wq == NULL)
-               return -ENOMEM;
-
        /* Set asic functions */
        r = radeon_asic_init(rdev);
        if (r)
@@ -813,7 +808,6 @@ void radeon_device_fini(struct radeon_device *rdev)
        /* evict vram memory */
        radeon_bo_evict_vram(rdev);
        radeon_fini(rdev);
-       destroy_workqueue(rdev->wq);
        vga_switcheroo_unregister_client(rdev->pdev);
        vga_client_register(rdev->pdev, NULL, NULL, NULL);
        if (rdev->rio_mem)

diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index c6861bb..a289646 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -64,8 +64,6 @@ void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
        struct radeon_device *rdev = dev->dev_private;
        unsigned i;
 
-       INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
-
        /* Disable *all* interrupts */
        rdev->irq.sw_int = false;
        rdev->irq.gui_idle = false;
@@ -114,6 +112,8 @@ int radeon_irq_kms_init(struct radeon_device *rdev)
 {
        int r = 0;
 
+       INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
+
        spin_lock_init(&rdev->irq.sw_lock);
        r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
        if (r) {
@@ -152,6 +152,7 @@ void radeon_irq_kms_fini(struct radeon_device *rdev)
                if (rdev->msi_enabled)
                        pci_disable_msi(rdev->pdev);
        }
+       flush_work_sync(&rdev->hotplug_work);
 }
 
 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 4de7776..0afd26c 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -405,20 +405,13 @@ static ssize_t radeon_set_pm_method(struct device *dev,
                rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
                mutex_unlock(&rdev->pm.mutex);
        } else if (strncmp("profile", buf, strlen("profile")) == 0) {
-               bool flush_wq = false;
-
                mutex_lock(&rdev->pm.mutex);
-               if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
-                       cancel_delayed_work(&rdev->pm.dynpm_idle_work);
-                       flush_wq = true;
-               }
                /* disable dynpm */
                rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
                rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
                rdev->pm.pm_method = PM_METHOD_PROFILE;
                mutex_unlock(&rdev->pm.mutex);
-               if (flush_wq)
-                       flush_workqueue(rdev->wq);
+               cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
        } else {
                DRM_ERROR("invalid power method!\n");
                goto fail;
@@ -524,18 +517,14 @@ static void radeon_hwmon_fini(struct radeon_device *rdev)
 
 void radeon_pm_suspend(struct radeon_device *rdev)
 {
-       bool flush_wq = false;
-
        mutex_lock(&rdev->pm.mutex);
        if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
-               cancel_delayed_work(&rdev->pm.dynpm_idle_work);
                if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
                        rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
-               flush_wq = true;
        }
        mutex_unlock(&rdev->pm.mutex);
-       if (flush_wq)
-               flush_workqueue(rdev->wq);
+
+       cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
 }
 
 void radeon_pm_resume(struct radeon_device *rdev)
@@ -550,8 +539,8 @@ void radeon_pm_resume(struct radeon_device *rdev)
        if (rdev->pm.pm_method == PM_METHOD_DYNPM
            && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
                rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
-               queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
-                                       msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
+               schedule_delayed_work(&rdev->pm.dynpm_idle_work,
+                                     msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
        }
        mutex_unlock(&rdev->pm.mutex);
        radeon_pm_compute_clocks(rdev);
@@ -585,6 +574,9 @@ int radeon_pm_init(struct radeon_device *rdev)
        ret = radeon_hwmon_init(rdev);
        if (ret)
                return ret;
+
+       INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
+
        if (rdev->pm.num_power_states > 1) {
                /* where's the best place to put these? */
                ret = device_create_file(rdev->dev, &dev_attr_power_profile);
@@ -598,8 +590,6 @@ int radeon_pm_init(struct radeon_device *rdev)
                rdev->acpi_nb.notifier_call = radeon_acpi_event;
                register_acpi_notifier(&rdev->acpi_nb);
 #endif
-               INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
-
                if (radeon_debugfs_pm_init(rdev)) {
                        DRM_ERROR("Failed to register debugfs file for PM!\n");
                }
@@ -613,25 +603,20 @@ int radeon_pm_init(struct radeon_device *rdev)
 void radeon_pm_fini(struct radeon_device *rdev)
 {
        if (rdev->pm.num_power_states > 1) {
-               bool flush_wq = false;
-
                mutex_lock(&rdev->pm.mutex);
                if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
                        rdev->pm.profile = PM_PROFILE_DEFAULT;
                        radeon_pm_update_profile(rdev);
                        radeon_pm_set_clocks(rdev);
                } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
-                       /* cancel work */
-                       cancel_delayed_work(&rdev->pm.dynpm_idle_work);
-                       flush_wq = true;
                        /* reset default clocks */
                        rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
                        rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
                        radeon_pm_set_clocks(rdev);
                }
                mutex_unlock(&rdev->pm.mutex);
-               if (flush_wq)
-                       flush_workqueue(rdev->wq);
+
+               cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
 
                device_remove_file(rdev->dev, &dev_attr_power_profile);
                device_remove_file(rdev->dev, &dev_attr_power_method);
@@ -690,12 +675,12 @@ void radeon_pm_compute_clocks(struct radeon_device *rdev)
                                        radeon_pm_get_dynpm_state(rdev);
                                        radeon_pm_set_clocks(rdev);
 
-                                       queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
-                                                          msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
+                                       schedule_delayed_work(&rdev->pm.dynpm_idle_work,
+                                                             msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
                                } else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
                                        rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
-                                       queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
-                                                          msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
+                                       schedule_delayed_work(&rdev->pm.dynpm_idle_work,
+                                                             msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
                                        DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");
                                }
                        } else { /* count == 0 */
@@ -800,8 +785,8 @@ static void radeon_dynpm_idle_work_handler(struct work_struct *work)
                        radeon_pm_set_clocks(rdev);
                }
 
-               queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
-                                       msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
+               schedule_delayed_work(&rdev->pm.dynpm_idle_work,
+                                     msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
        }
        mutex_unlock(&rdev->pm.mutex);
        ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);

diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index 9a85b16..b4192ac 100644 (file)
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -692,7 +692,7 @@ int rs600_irq_process(struct radeon_device *rdev)
        /* reset gui idle ack.  the status bit is broken */
        rdev->irq.gui_idle_acked = false;
        if (queue_hotplug)
-               queue_work(rdev->wq, &rdev->hotplug_work);
+               schedule_work(&rdev->hotplug_work);
        if (rdev->msi_enabled) {
                switch (rdev->family) {
                case CHIP_RS600: