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Message-ID: <AANLkTin0PtAj+RynsePYHcgVw3Oe0fq5kQMLU9z=V_1e@mail.gmail.com>
Date: Tue, 4 Jan 2011 19:21:35 -0500
From: Alex Deucher <alexdeucher@...il.com>
To: Tejun Heo <tj@...nel.org>
Cc: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 09/32] drm/radeon: use system_wq instead of dev_priv->wq
On Mon, Jan 3, 2011 at 8:49 AM, Tejun Heo <tj@...nel.org> wrote:
> 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@...nel.org>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: dri-devel@...ts.freedesktop.org
> ---
> Only compile tested. Please feel free to take it into the subsystem
> tree or simply ack - I'll route it through the wq tree.
Patch looks good to me. I'm not sure what's the best way to send this
upstream. I'm working on some irq changes in the same area now, so
I'd prefer if we pushed it through Dave's tree, but I can handle it
either way.
Acked-by: Alex Deucher <alexdeucher@...il.com>
Alex
>
> Thanks.
>
> drivers/gpu/drm/radeon/evergreen.c | 2 +-
> drivers/gpu/drm/radeon/r100.c | 2 +-
> drivers/gpu/drm/radeon/r600.c | 2 +-
> drivers/gpu/drm/radeon/radeon.h | 1 -
> drivers/gpu/drm/radeon/radeon_device.c | 6 ----
> drivers/gpu/drm/radeon/radeon_irq_kms.c | 5 ++-
> drivers/gpu/drm/radeon/radeon_pm.c | 47 ++++++++++--------------------
> drivers/gpu/drm/radeon/rs600.c | 2 +-
> 8 files changed, 23 insertions(+), 44 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
> index 7b337c3..6540adb 100644
> --- a/drivers/gpu/drm/radeon/evergreen.c
> +++ b/drivers/gpu/drm/radeon/evergreen.c
> @@ -2516,7 +2516,7 @@ 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 8e10aa9..1d15748 100644
> --- a/drivers/gpu/drm/radeon/r100.c
> +++ b/drivers/gpu/drm/radeon/r100.c
> @@ -622,7 +622,7 @@ 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 9c92db7..f927cd4 100644
> --- a/drivers/gpu/drm/radeon/r600.c
> +++ b/drivers/gpu/drm/radeon/r600.c
> @@ -3419,7 +3419,7 @@ 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 3a70957..ba233a8 100644
> --- a/drivers/gpu/drm/radeon/radeon.h
> +++ b/drivers/gpu/drm/radeon/radeon.h
> @@ -1095,7 +1095,6 @@ 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 501966a..4bc0012 100644
> --- a/drivers/gpu/drm/radeon/radeon_device.c
> +++ b/drivers/gpu/drm/radeon/radeon_device.c
> @@ -704,11 +704,6 @@ 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)
> @@ -806,7 +801,6 @@ 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 a108c7e..33b9d21 100644
> --- 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;
> @@ -110,6 +108,8 @@ 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) {
> @@ -148,6 +148,7 @@ 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 8c9b2ef..845f295 100644
> --- 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;
> @@ -520,18 +513,14 @@ 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)
> @@ -546,8 +535,8 @@ 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);
> @@ -581,6 +570,9 @@ 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);
> @@ -594,8 +586,6 @@ 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");
> }
> @@ -609,25 +599,20 @@ 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);
> @@ -686,12 +671,12 @@ 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 */
> @@ -796,8 +781,8 @@ 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 f1c6e02..2d707d4 100644
> --- a/drivers/gpu/drm/radeon/rs600.c
> +++ b/drivers/gpu/drm/radeon/rs600.c
> @@ -634,7 +634,7 @@ 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:
> --
> 1.7.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>
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