diff options
author | Jerome Glisse <jglisse@redhat.com> | 2011-12-21 12:13:47 -0500 |
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committer | Dave Airlie <airlied@redhat.com> | 2012-01-05 10:03:53 +0000 |
commit | c1341e52802ab401be7addb55408e23307f9074b (patch) | |
tree | 84319dfa10da13769fd9562eda73a8e60f069088 /drivers/gpu/drm/radeon/radeon_semaphore.c | |
parent | 69e130a6a42270f94e6ee0bce34c3480a6b9da61 (diff) | |
download | op-kernel-dev-c1341e52802ab401be7addb55408e23307f9074b.zip op-kernel-dev-c1341e52802ab401be7addb55408e23307f9074b.tar.gz |
drm/radeon: allocate semaphore from the ib pool
This allow to share the ib pool with semaphore and avoid
having more bo around.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.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.c | 157 |
1 files changed, 87 insertions, 70 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c index f8cf044..61dd4e3 100644 --- a/drivers/gpu/drm/radeon/radeon_semaphore.c +++ b/drivers/gpu/drm/radeon/radeon_semaphore.c @@ -31,90 +31,109 @@ #include "drm.h" #include "radeon.h" -static int allocate_semaphores(struct radeon_device *rdev) +static int radeon_semaphore_add_bo(struct radeon_device *rdev) { - const unsigned long bo_size = PAGE_SIZE * 4; - - struct radeon_bo *bo; - struct list_head new_entrys; + struct radeon_semaphore_bo *bo; unsigned long irq_flags; uint64_t gpu_addr; - void *map; - int i, r; + uint32_t *cpu_ptr; + int r, i; - r = radeon_bo_create(rdev, bo_size, RADEON_GPU_PAGE_SIZE, true, - RADEON_GEM_DOMAIN_GTT, &bo); - if (r) { - dev_err(rdev->dev, "(%d) failed to allocate semaphore bo\n", r); - return r; - } - - r = radeon_bo_reserve(bo, false); - if (r) { - radeon_bo_unref(&bo); - dev_err(rdev->dev, "(%d) failed to reserve semaphore bo\n", r); - return r; - } - r = radeon_bo_kmap(bo, &map); - if (r) { - radeon_bo_unreserve(bo); - radeon_bo_unref(&bo); - dev_err(rdev->dev, "(%d) semaphore map failed\n", r); - return r; + bo = kmalloc(sizeof(struct radeon_semaphore_bo), GFP_KERNEL); + if (bo == NULL) { + return -ENOMEM; } - memset(map, 0, bo_size); - radeon_bo_kunmap(bo); + INIT_LIST_HEAD(&bo->free); + INIT_LIST_HEAD(&bo->list); + bo->nused = 0; - r = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_VRAM, &gpu_addr); + r = radeon_ib_get(rdev, 0, &bo->ib, RADEON_SEMAPHORE_BO_SIZE); if (r) { - radeon_bo_unreserve(bo); - radeon_bo_unref(&bo); - dev_err(rdev->dev, "(%d) semaphore pin failed\n", r); + dev_err(rdev->dev, "failed to get a bo after 5 retry\n"); + kfree(bo); return r; } - - INIT_LIST_HEAD(&new_entrys); - for (i = 0; i < bo_size/8; ++i) { - struct radeon_semaphore *sem = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); - ttm_bo_reference(&bo->tbo); - sem->robj = bo; - sem->gpu_addr = gpu_addr; + gpu_addr = rdev->ib_pool.sa_manager.gpu_addr; + gpu_addr += bo->ib->sa_bo.offset; + cpu_ptr = rdev->ib_pool.sa_manager.cpu_ptr; + cpu_ptr += (bo->ib->sa_bo.offset >> 2); + 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; - list_add_tail(&sem->list, &new_entrys); + cpu_ptr += 2; } - - radeon_bo_unreserve(bo); - radeon_bo_unref(&bo); - write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); - list_splice_tail(&new_entrys, &rdev->semaphore_drv.free); + list_add_tail(&bo->list, &rdev->semaphore_drv.bo); write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); + return 0; +} - DRM_INFO("%d new semaphores allocated\n", (int)(bo_size/8)); +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); + radeon_fence_unref(&bo->ib->fence); + list_del(&bo->list); + kfree(bo); +} - return 0; +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); - if (list_empty(&rdev->semaphore_drv.free)) { - int r; - write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); - r = allocate_semaphores(rdev); - if (r) - return r; - 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 = list_first_entry(&rdev->semaphore_drv.free, struct radeon_semaphore, list); - list_del(&(*semaphore)->list); + if (*semaphore == NULL) { + if (do_retry) { + do_retry = false; + r = radeon_semaphore_add_bo(rdev); + if (r) + return r; + goto retry; + } + return -ENOMEM; + } - write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); return 0; } @@ -131,31 +150,29 @@ void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring, } void radeon_semaphore_free(struct radeon_device *rdev, - struct radeon_semaphore *semaphore) + struct radeon_semaphore *semaphore) { unsigned long irq_flags; write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); - list_add_tail(&semaphore->list, &rdev->semaphore_drv.free); + 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 *i, *n; - struct list_head entrys; + struct radeon_semaphore_bo *bo, *n; unsigned long irq_flags; - INIT_LIST_HEAD(&entrys); write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags); - if (!list_empty(&rdev->semaphore_drv.free)) { - list_splice(&rdev->semaphore_drv.free, &entrys); + /* 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); } - INIT_LIST_HEAD(&rdev->semaphore_drv.free); write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags); - - list_for_each_entry_safe(i, n, &entrys, list) { - radeon_bo_unref(&i->robj); - kfree(i); - } } |