On Thu, May 24, 2012 at 11:35 AM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On Thu, May 24, 2012 at 3:49 AM, Christian K?nig
> <deathsimple at vodafone.de> wrote:
>> From: Christian Koenig <christian.koenig at amd.com>
>>
>> 1. It is really dangerous to have more than one
>> ? spinlock protecting the same information.
>>
>> 2. radeon_irq_set sometimes wasn't called with lock
>> ? protection, so it can happen that more than one
>> ? CPU would tamper with the irq regs at the same
>> ? time.
>>
>> 3. The pm.gui_idle variable was assuming that the 3D
>> ? engine wasn't becoming idle between testing the
>> ? register and setting the variable. So just remove
>> ? it and test the register directly.
>>
>> Signed-off-by: Christian Koenig <christian.koenig at amd.com>
>> ---
>> ?drivers/gpu/drm/radeon/evergreen.c ? ? ?| ? ?1 -
>> ?drivers/gpu/drm/radeon/r100.c ? ? ? ? ? | ? ?1 -
>> ?drivers/gpu/drm/radeon/r600.c ? ? ? ? ? | ? ?1 -
>> ?drivers/gpu/drm/radeon/r600_hdmi.c ? ? ?| ? ?6 +--
>> ?drivers/gpu/drm/radeon/radeon.h ? ? ? ? | ? 33 +++++++-------
>> ?drivers/gpu/drm/radeon/radeon_irq_kms.c | ? 72
>> +++++++++++++++++++++++++------
>> ?drivers/gpu/drm/radeon/radeon_kms.c ? ? | ? 12 ++++--
>> ?drivers/gpu/drm/radeon/radeon_pm.c ? ? ?| ? 12 +-----
>> ?drivers/gpu/drm/radeon/rs600.c ? ? ? ? ?| ? ?1 -
>> ?drivers/gpu/drm/radeon/si.c ? ? ? ? ? ? | ? ?1 -
>> ?10 files changed, 90 insertions(+), 50 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/radeon/evergreen.c
>> b/drivers/gpu/drm/radeon/evergreen.c
>> index bfcb39e..9e9b3bb 100644
>> --- a/drivers/gpu/drm/radeon/evergreen.c
>> +++ b/drivers/gpu/drm/radeon/evergreen.c
>> @@ -3254,7 +3254,6 @@ restart_ih:
>> ? ? ? ? ? ? ? ? ? ? ? ?break;
>> ? ? ? ? ? ? ? ?case 233: /* GUI IDLE */
>> ? ? ? ? ? ? ? ? ? ? ? ?DRM_DEBUG("IH: GUI idle\n");
>> - ? ? ? ? ? ? ? ? ? ? ? rdev->pm.gui_idle = true;
>> ? ? ? ? ? ? ? ? ? ? ? ?wake_up(&rdev->irq.idle_queue);
>> ? ? ? ? ? ? ? ? ? ? ? ?break;
>> ? ? ? ? ? ? ? ?default:
>> diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
>> index 415b7d8..2587426 100644
>> --- a/drivers/gpu/drm/radeon/r100.c
>> +++ b/drivers/gpu/drm/radeon/r100.c
>> @@ -782,7 +782,6 @@ int r100_irq_process(struct radeon_device *rdev)
>> ? ? ? ? ? ? ? ?/* gui idle interrupt */
>> ? ? ? ? ? ? ? ?if (status & RADEON_GUI_IDLE_STAT) {
>> ? ? ? ? ? ? ? ? ? ? ? ?rdev->irq.gui_idle_acked = true;
>> - ? ? ? ? ? ? ? ? ? ? ? rdev->pm.gui_idle = true;
>> ? ? ? ? ? ? ? ? ? ? ? ?wake_up(&rdev->irq.idle_queue);
>> ? ? ? ? ? ? ? ?}
>> ? ? ? ? ? ? ? ?/* Vertical blank interrupts */
>> diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
>> index eadbb06..90c6639 100644
>> --- a/drivers/gpu/drm/radeon/r600.c
>> +++ b/drivers/gpu/drm/radeon/r600.c
>> @@ -3542,7 +3542,6 @@ restart_ih:
>> ? ? ? ? ? ? ? ? ? ? ? ?break;
>> ? ? ? ? ? ? ? ?case 233: /* GUI IDLE */
>> ? ? ? ? ? ? ? ? ? ? ? ?DRM_DEBUG("IH: GUI idle\n");
>> - ? ? ? ? ? ? ? ? ? ? ? rdev->pm.gui_idle = true;
>> ? ? ? ? ? ? ? ? ? ? ? ?wake_up(&rdev->irq.idle_queue);
>> ? ? ? ? ? ? ? ? ? ? ? ?break;
>> ? ? ? ? ? ? ? ?default:
>> diff --git a/drivers/gpu/drm/radeon/r600_hdmi.c
>> b/drivers/gpu/drm/radeon/r600_hdmi.c
>> index 226379e..b76c0f2 100644
>> --- a/drivers/gpu/drm/radeon/r600_hdmi.c
>> +++ b/drivers/gpu/drm/radeon/r600_hdmi.c
>> @@ -523,8 +523,7 @@ void r600_hdmi_enable(struct drm_encoder *encoder)
>>
>> ? ? ? ?if (rdev->irq.installed) {
>> ? ? ? ? ? ? ? ?/* if irq is available use it */
>> - ? ? ? ? ? ? ? rdev->irq.afmt[dig->afmt->id] = true;
>> - ? ? ? ? ? ? ? radeon_irq_set(rdev);
>> + ? ? ? ? ? ? ? radeon_irq_kms_enable_afmt(rdev, dig->afmt->id);
>> ? ? ? ?}
>>
>> ? ? ? ?dig->afmt->enabled = true;
>> @@ -560,8 +559,7 @@ void r600_hdmi_disable(struct drm_encoder *encoder)
>> ? ? ? ? ? ? ? ? ?offset, radeon_encoder->encoder_id);
>>
>> ? ? ? ?/* disable irq */
>> - ? ? ? rdev->irq.afmt[dig->afmt->id] = false;
>> - ? ? ? radeon_irq_set(rdev);
>> + ? ? ? radeon_irq_kms_disable_afmt(rdev, dig->afmt->id);
>>
>> ? ? ? ?/* Older chipsets not handled by AtomBIOS */
>> ? ? ? ?if (rdev->family >= CHIP_R600 && !ASIC_IS_DCE3(rdev)) {
>> diff --git a/drivers/gpu/drm/radeon/radeon.h
>> b/drivers/gpu/drm/radeon/radeon.h
>> index 8479096..23552b4 100644
>> --- a/drivers/gpu/drm/radeon/radeon.h
>> +++ b/drivers/gpu/drm/radeon/radeon.h
>> @@ -610,21 +610,20 @@ union radeon_irq_stat_regs {
>> ?#define RADEON_MAX_AFMT_BLOCKS 6
>>
>> ?struct radeon_irq {
>> - ? ? ? bool ? ? ? ? ? ?installed;
>> - ? ? ? bool ? ? ? ? ? ?sw_int[RADEON_NUM_RINGS];
>> - ? ? ? bool ? ? ? ? ? ?crtc_vblank_int[RADEON_MAX_CRTCS];
>> - ? ? ? bool ? ? ? ? ? ?pflip[RADEON_MAX_CRTCS];
>> - ? ? ? wait_queue_head_t ? ? ? vblank_queue;
>> - ? ? ? bool ? ? ? ? ? ?hpd[RADEON_MAX_HPD_PINS];
>> - ? ? ? bool ? ? ? ? ? ?gui_idle;
>> - ? ? ? bool ? ? ? ? ? ?gui_idle_acked;
>> - ? ? ? wait_queue_head_t ? ? ? idle_queue;
>> - ? ? ? bool ? ? ? ? ? ?afmt[RADEON_MAX_AFMT_BLOCKS];
>> - ? ? ? spinlock_t sw_lock;
>> - ? ? ? int sw_refcount[RADEON_NUM_RINGS];
>> - ? ? ? union radeon_irq_stat_regs stat_regs;
>> - ? ? ? spinlock_t pflip_lock[RADEON_MAX_CRTCS];
>> - ? ? ? int pflip_refcount[RADEON_MAX_CRTCS];
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?installed;
>> + ? ? ? spinlock_t ? ? ? ? ? ? ? ? ? ? ?lock;
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?sw_int[RADEON_NUM_RINGS];
>> + ? ? ? int ? ? ? ? ? ? ? ? ? ? ? ? ? ? sw_refcount[RADEON_NUM_RINGS];
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?crtc_vblank_int[RADEON_MAX_CRTCS];
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?pflip[RADEON_MAX_CRTCS];
>> + ? ? ? int ? ? ? ? ? ? ? ? ? ? ? ? ? ? pflip_refcount[RADEON_MAX_CRTCS];
>> + ? ? ? wait_queue_head_t ? ? ? ? ? ? ? vblank_queue;
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?hpd[RADEON_MAX_HPD_PINS];
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?gui_idle;
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?gui_idle_acked;
>> + ? ? ? wait_queue_head_t ? ? ? ? ? ? ? idle_queue;
>> + ? ? ? bool ? ? ? ? ? ? ? ? ? ? ? ? ? ?afmt[RADEON_MAX_AFMT_BLOCKS];
>> + ? ? ? union radeon_irq_stat_regs ? ? ?stat_regs;
>> ?};
>>
>> ?int radeon_irq_kms_init(struct radeon_device *rdev);
>> @@ -633,6 +632,9 @@ void radeon_irq_kms_sw_irq_get(struct radeon_device
>> *rdev, int ring);
>> ?void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring);
>> ?void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc);
>> ?void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc);
>> +void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block);
>> +void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block);
>> +int radeon_irq_kms_wait_gui_idle(struct radeon_device *rdev);
>>
>> ?/*
>> ?* CP & rings.
>> @@ -1058,7 +1060,6 @@ struct radeon_pm {
>> ? ? ? ?int ? ? ? ? ? ? ? ? ? ? active_crtc_count;
>> ? ? ? ?int ? ? ? ? ? ? ? ? ? ? req_vblank;
>> ? ? ? ?bool ? ? ? ? ? ? ? ? ? ?vblank_sync;
>> - ? ? ? bool ? ? ? ? ? ? ? ? ? ?gui_idle;
>> ? ? ? ?fixed20_12 ? ? ? ? ? ? ?max_bandwidth;
>> ? ? ? ?fixed20_12 ? ? ? ? ? ? ?igp_sideport_mclk;
>> ? ? ? ?fixed20_12 ? ? ? ? ? ? ?igp_system_mclk;
>> diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c
>> b/drivers/gpu/drm/radeon/radeon_irq_kms.c
>> index 5df58d1..11fc4f7 100644
>> --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
>> +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
>> @@ -32,6 +32,8 @@
>> ?#include "radeon.h"
>> ?#include "atom.h"
>>
>> +#define RADEON_WAIT_IDLE_TIMEOUT 200
>> +
>> ?irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
>> ?{
>> ? ? ? ?struct drm_device *dev = (struct drm_device *) arg;
>> @@ -62,8 +64,10 @@ static void radeon_hotplug_work_func(struct work_struct
>> *work)
>> ?void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
>> ?{
>> ? ? ? ?struct radeon_device *rdev = dev->dev_private;
>> + ? ? ? unsigned long irqflags;
>> ? ? ? ?unsigned i;
>>
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> ? ? ? ?/* Disable *all* interrupts */
>> ? ? ? ?for (i = 0; i < RADEON_NUM_RINGS; i++)
>> ? ? ? ? ? ? ? ?rdev->irq.sw_int[i] = false;
>> @@ -76,6 +80,7 @@ void radeon_driver_irq_preinstall_kms(struct drm_device
>> *dev)
>> ? ? ? ? ? ? ? ?rdev->irq.afmt[i] = false;
>> ? ? ? ?}
>> ? ? ? ?radeon_irq_set(rdev);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> ? ? ? ?/* Clear bits */
>> ? ? ? ?radeon_irq_process(rdev);
>> ?}
>> @@ -83,23 +88,28 @@ void radeon_driver_irq_preinstall_kms(struct drm_device
>> *dev)
>> ?int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
>> ?{
>> ? ? ? ?struct radeon_device *rdev = dev->dev_private;
>> + ? ? ? unsigned long irqflags;
>> ? ? ? ?unsigned i;
>>
>> ? ? ? ?dev->max_vblank_count = 0x001fffff;
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> ? ? ? ?for (i = 0; i < RADEON_NUM_RINGS; i++)
>> ? ? ? ? ? ? ? ?rdev->irq.sw_int[i] = true;
>> ? ? ? ?radeon_irq_set(rdev);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> ? ? ? ?return 0;
>> ?}
>>
>> ?void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
>> ?{
>> ? ? ? ?struct radeon_device *rdev = dev->dev_private;
>> + ? ? ? unsigned long irqflags;
>> ? ? ? ?unsigned i;
>>
>> ? ? ? ?if (rdev == NULL) {
>> ? ? ? ? ? ? ? ?return;
>> ? ? ? ?}
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> ? ? ? ?/* Disable *all* interrupts */
>> ? ? ? ?for (i = 0; i < RADEON_NUM_RINGS; i++)
>> ? ? ? ? ? ? ? ?rdev->irq.sw_int[i] = false;
>> @@ -112,6 +122,7 @@ void radeon_driver_irq_uninstall_kms(struct drm_device
>> *dev)
>> ? ? ? ? ? ? ? ?rdev->irq.afmt[i] = false;
>> ? ? ? ?}
>> ? ? ? ?radeon_irq_set(rdev);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> ?}
>>
>> ?static bool radeon_msi_ok(struct radeon_device *rdev)
>> @@ -168,15 +179,12 @@ static bool radeon_msi_ok(struct radeon_device *rdev)
>>
>> ?int radeon_irq_kms_init(struct radeon_device *rdev)
>> ?{
>> - ? ? ? int i;
>> ? ? ? ?int r = 0;
>>
>> ? ? ? ?INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
>> ? ? ? ?INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
>>
>> - ? ? ? spin_lock_init(&rdev->irq.sw_lock);
>> - ? ? ? for (i = 0; i < rdev->num_crtc; i++)
>> - ? ? ? ? ? ? ? spin_lock_init(&rdev->irq.pflip_lock[i]);
>> + ? ? ? spin_lock_init(&rdev->irq.lock);
>> ? ? ? ?r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
>> ? ? ? ?if (r) {
>> ? ? ? ? ? ? ? ?return r;
>> @@ -217,25 +225,25 @@ void radeon_irq_kms_sw_irq_get(struct radeon_device
>> *rdev, int ring)
>> ?{
>> ? ? ? ?unsigned long irqflags;
>>
>> - ? ? ? spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> ? ? ? ?if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount[ring] == 1)) {
>> ? ? ? ? ? ? ? ?rdev->irq.sw_int[ring] = true;
>> ? ? ? ? ? ? ? ?radeon_irq_set(rdev);
>> ? ? ? ?}
>> - ? ? ? spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> ?}
>>
>> ?void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
>> ?{
>> ? ? ? ?unsigned long irqflags;
>>
>> - ? ? ? spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> ? ? ? ?BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount[ring] <= 0);
>> ? ? ? ?if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount[ring] == 0)) {
>> ? ? ? ? ? ? ? ?rdev->irq.sw_int[ring] = false;
>> ? ? ? ? ? ? ? ?radeon_irq_set(rdev);
>> ? ? ? ?}
>> - ? ? ? spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> ?}
>>
>> ?void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
>> @@ -245,12 +253,12 @@ void radeon_irq_kms_pflip_irq_get(struct radeon_device
>> *rdev, int crtc)
>> ? ? ? ?if (crtc < 0 || crtc >= rdev->num_crtc)
>> ? ? ? ? ? ? ? ?return;
>>
>> - ? ? ? spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> ? ? ? ?if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] ==
>> 1)) {
>> ? ? ? ? ? ? ? ?rdev->irq.pflip[crtc] = true;
>> ? ? ? ? ? ? ? ?radeon_irq_set(rdev);
>> ? ? ? ?}
>> - ? ? ? spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> ?}
>>
>> ?void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
>> @@ -260,12 +268,52 @@ void radeon_irq_kms_pflip_irq_put(struct radeon_device
>> *rdev, int crtc)
>> ? ? ? ?if (crtc < 0 || crtc >= rdev->num_crtc)
>> ? ? ? ? ? ? ? ?return;
>>
>> - ? ? ? spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> ? ? ? ?BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <=
>> 0);
>> ? ? ? ?if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] ==
>> 0)) {
>> ? ? ? ? ? ? ? ?rdev->irq.pflip[crtc] = false;
>> ? ? ? ? ? ? ? ?radeon_irq_set(rdev);
>> ? ? ? ?}
>> - ? ? ? spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> +}
>> +
>> +void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
>> +{
>> + ? ? ? unsigned long irqflags;
>> +
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> + ? ? ? rdev->irq.afmt[block] = true;
>> + ? ? ? radeon_irq_set(rdev);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> +
>> +}
>> +
>> +void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
>> +{
>> + ? ? ? unsigned long irqflags;
>> +
>> + ? ? ? spin_lock_irqsave(&rdev->irq.lock, irqflags);
>> + ? ? ? rdev->irq.afmt[block] = false;
>> + ? ? ? radeon_irq_set(rdev);
>> + ? ? ? spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
>> ?}
>>
>
> Should probably also add radeon_irq_kms_[en|dis]able_hpd() function
> and call replaced the calls to *_irq_set() in the *_hpd_init() and
> *_hpd_fini() callbacks for display hotplug.
See attached follow on patch.
Alex
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