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drm/radeon: replace vmram_mutex with mclk_lock v2 

It is a rw_semaphore now and only write locked
while changing the clock. Also the lock is renamed
to better reflect what it is protecting.

v2: Keep the ttm_vm_ops on IGPs

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
hifive-unleashed-5.1
Christian König 2012-05-11 14:57:18 +02:00
parent 220907d983
commit db7fce3983
5 changed files with 11 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/radeon/radeon.h
View File

@ -1059,6 +1059,8 @@ struct radeon_power_state {
struct radeon_pm {
struct mutex mutex;
/* write locked while reprogramming mclk */
struct rw_semaphore mclk_lock;
u32 active_crtcs;
int active_crtc_count;
int req_vblank;
@ -1554,7 +1556,6 @@ struct radeon_device {
struct work_struct audio_work;
int num_crtc; /* number of crtcs */
struct mutex dc_hw_i2c_mutex; /* display controller hw i2c mutex */
struct mutex vram_mutex;
bool audio_enabled;
struct r600_audio audio_status; /* audio stuff */
struct notifier_block acpi_nb;

2
drivers/gpu/drm/radeon/radeon_device.c
View File

@ -735,7 +735,7 @@ int radeon_device_init(struct radeon_device *rdev,
spin_lock_init(&rdev->ih.lock);
mutex_init(&rdev->gem.mutex);
mutex_init(&rdev->pm.mutex);
mutex_init(&rdev->vram_mutex);
init_rwsem(&rdev->pm.mclk_lock);
init_waitqueue_head(&rdev->irq.vblank_queue);
init_waitqueue_head(&rdev->irq.idle_queue);
r = radeon_gem_init(rdev);

8
drivers/gpu/drm/radeon/radeon_object.c
View File

@ -154,11 +154,11 @@ retry:
INIT_LIST_HEAD(&bo->va);
radeon_ttm_placement_from_domain(bo, domain);
/* Kernel allocation are uninterruptible */
mutex_lock(&rdev->vram_mutex);
down_read(&rdev->pm.mclk_lock);
r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
&bo->placement, page_align, 0, !kernel, NULL,
acc_size, sg, &radeon_ttm_bo_destroy);
mutex_unlock(&rdev->vram_mutex);
up_read(&rdev->pm.mclk_lock);
if (unlikely(r != 0)) {
if (r != -ERESTARTSYS) {
if (domain == RADEON_GEM_DOMAIN_VRAM) {
@ -219,9 +219,9 @@ void radeon_bo_unref(struct radeon_bo **bo)
return;
rdev = (*bo)->rdev;
tbo = &((*bo)->tbo);
mutex_lock(&rdev->vram_mutex);
down_read(&rdev->pm.mclk_lock);
ttm_bo_unref(&tbo);
mutex_unlock(&rdev->vram_mutex);
up_read(&rdev->pm.mclk_lock);
if (tbo == NULL)
*bo = NULL;
}

4
drivers/gpu/drm/radeon/radeon_pm.c
View File

@ -251,7 +251,7 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev)
return;
mutex_lock(&rdev->ddev->struct_mutex);
mutex_lock(&rdev->vram_mutex);
down_write(&rdev->pm.mclk_lock);
mutex_lock(&rdev->ring_lock);
/* gui idle int has issues on older chips it seems */
@ -303,7 +303,7 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev)
rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
mutex_unlock(&rdev->ring_lock);
mutex_unlock(&rdev->vram_mutex);
up_write(&rdev->pm.mclk_lock);
mutex_unlock(&rdev->ddev->struct_mutex);
}

4
drivers/gpu/drm/radeon/radeon_ttm.c
View File

@ -797,9 +797,9 @@ static int radeon_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
return VM_FAULT_NOPAGE;
}
rdev = radeon_get_rdev(bo->bdev);
mutex_lock(&rdev->vram_mutex);
down_read(&rdev->pm.mclk_lock);
r = ttm_vm_ops->fault(vma, vmf);
mutex_unlock(&rdev->vram_mutex);
up_read(&rdev->pm.mclk_lock);
return r;
}