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authorJerome Glisse <jglisse@redhat.com>2012-05-09 15:34:57 +0200
committerDave Airlie <airlied@redhat.com>2012-05-09 17:22:40 +0100
commita8c05940bd590d96229bc170a63f14a22fb9c803 (patch)
tree74619acfa5d70690b437d3477b14513caf22bbc2 /drivers/gpu/drm/radeon/radeon_semaphore.c
parentc3b7fe8b8a0b717f90a4a0c49cffae27e46e3fb7 (diff)
downloadlinux-stericsson-a8c05940bd590d96229bc170a63f14a22fb9c803.tar.gz
drm/radeon: simplify semaphore handling v2
Directly use the suballocator to get small chunks of memory. It's equally fast and doesn't crash when we encounter a GPU reset. v2: rebased on new SA interface. Signed-off-by: Christian K├Ânig <deathsimple@vodafone.de> Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_semaphore.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_semaphore.c137
1 files changed, 23 insertions, 114 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c
index dbde874b2e5e..1bc5513a5292 100644
--- a/drivers/gpu/drm/radeon/radeon_semaphore.c
+++ b/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -31,118 +31,40 @@
#include "drm.h"
#include "radeon.h"
-static int radeon_semaphore_add_bo(struct radeon_device *rdev)
-{
- struct radeon_semaphore_bo *bo;
- unsigned long irq_flags;
- uint64_t gpu_addr;
- uint32_t *cpu_ptr;
- int r, i;
-
- bo = kmalloc(sizeof(struct radeon_semaphore_bo), GFP_KERNEL);
- if (bo == NULL) {
- return -ENOMEM;
- }
- INIT_LIST_HEAD(&bo->free);
- INIT_LIST_HEAD(&bo->list);
- bo->nused = 0;
-
- r = radeon_ib_get(rdev, 0, &bo->ib, RADEON_SEMAPHORE_BO_SIZE);
- if (r) {
- dev_err(rdev->dev, "failed to get a bo after 5 retry\n");
- kfree(bo);
- return r;
- }
- gpu_addr = radeon_sa_bo_gpu_addr(bo->ib->sa_bo);
- cpu_ptr = radeon_sa_bo_cpu_addr(bo->ib->sa_bo);
- for (i = 0; i < (RADEON_SEMAPHORE_BO_SIZE/8); i++) {
- bo->semaphores[i].gpu_addr = gpu_addr;
- bo->semaphores[i].cpu_ptr = cpu_ptr;
- bo->semaphores[i].bo = bo;
- list_add_tail(&bo->semaphores[i].list, &bo->free);
- gpu_addr += 8;
- cpu_ptr += 2;
- }
- write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
- list_add_tail(&bo->list, &rdev->semaphore_drv.bo);
- write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
- return 0;
-}
-
-static void radeon_semaphore_del_bo_locked(struct radeon_device *rdev,
- struct radeon_semaphore_bo *bo)
-{
- radeon_sa_bo_free(rdev, &bo->ib->sa_bo, NULL);
- radeon_fence_unref(&bo->ib->fence);
- list_del(&bo->list);
- kfree(bo);
-}
-
-void radeon_semaphore_shrink_locked(struct radeon_device *rdev)
-{
- struct radeon_semaphore_bo *bo, *n;
-
- if (list_empty(&rdev->semaphore_drv.bo)) {
- return;
- }
- /* only shrink if first bo has free semaphore */
- bo = list_first_entry(&rdev->semaphore_drv.bo, struct radeon_semaphore_bo, list);
- if (list_empty(&bo->free)) {
- return;
- }
- list_for_each_entry_safe_continue(bo, n, &rdev->semaphore_drv.bo, list) {
- if (bo->nused)
- continue;
- radeon_semaphore_del_bo_locked(rdev, bo);
- }
-}
int radeon_semaphore_create(struct radeon_device *rdev,
struct radeon_semaphore **semaphore)
{
- struct radeon_semaphore_bo *bo;
- unsigned long irq_flags;
- bool do_retry = true;
int r;
-retry:
- *semaphore = NULL;
- write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
- list_for_each_entry(bo, &rdev->semaphore_drv.bo, list) {
- if (list_empty(&bo->free))
- continue;
- *semaphore = list_first_entry(&bo->free, struct radeon_semaphore, list);
- (*semaphore)->cpu_ptr[0] = 0;
- (*semaphore)->cpu_ptr[1] = 0;
- list_del(&(*semaphore)->list);
- bo->nused++;
- break;
- }
- write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
-
+ *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
if (*semaphore == NULL) {
- if (do_retry) {
- do_retry = false;
- r = radeon_semaphore_add_bo(rdev);
- if (r)
- return r;
- goto retry;
- }
return -ENOMEM;
}
-
+ r = radeon_sa_bo_new(rdev, &rdev->ib_pool.sa_manager,
+ &(*semaphore)->sa_bo, 8, 8, true);
+ if (r) {
+ kfree(*semaphore);
+ *semaphore = NULL;
+ return r;
+ }
+ (*semaphore)->waiters = 0;
+ (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
+ *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
return 0;
}
void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
struct radeon_semaphore *semaphore)
{
+ --semaphore->waiters;
radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false);
}
void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
struct radeon_semaphore *semaphore)
{
+ ++semaphore->waiters;
radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true);
}
@@ -200,29 +122,16 @@ error:
}
void radeon_semaphore_free(struct radeon_device *rdev,
- struct radeon_semaphore *semaphore)
+ struct radeon_semaphore *semaphore,
+ struct radeon_fence *fence)
{
- unsigned long irq_flags;
-
- write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
- semaphore->bo->nused--;
- list_add_tail(&semaphore->list, &semaphore->bo->free);
- radeon_semaphore_shrink_locked(rdev);
- write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
-}
-
-void radeon_semaphore_driver_fini(struct radeon_device *rdev)
-{
- struct radeon_semaphore_bo *bo, *n;
- unsigned long irq_flags;
-
- write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
- /* we force to free everything */
- list_for_each_entry_safe(bo, n, &rdev->semaphore_drv.bo, list) {
- if (!list_empty(&bo->free)) {
- dev_err(rdev->dev, "still in use semaphore\n");
- }
- radeon_semaphore_del_bo_locked(rdev, bo);
+ if (semaphore == NULL) {
+ return;
+ }
+ if (semaphore->waiters > 0) {
+ dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
+ " hardware lockup imminent!\n", semaphore);
}
- write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
+ radeon_sa_bo_free(rdev, &semaphore->sa_bo, fence);
+ kfree(semaphore);
}