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authorChristian König <deathsimple@vodafone.de>2011-09-15 19:02:22 +0200
committerDave Airlie <airlied@redhat.com>2011-12-20 19:49:36 +0000
commit15d3332f31afd571a6d23971dbc8d8db2856e661 (patch)
tree71610dd9dd6c455fe2f4ec3639691b10388d1dab /drivers/gpu/drm/radeon/radeon_semaphore.c
parent7465280c076d6440e5908c158c83b542dc063a30 (diff)
downloadlinux-stericsson-15d3332f31afd571a6d23971dbc8d8db2856e661.tar.gz
drm/radeon/kms: add support for semaphores v3
They are used to sync between rings, while fences sync between a ring and the cpu. v2 Fix radeon_semaphore_driver_fini when no semaphore were allocated. v3 Initialize list early on to avoid issue in case or early error Signed-off-by: Christian König <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.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c
new file mode 100644
index 000000000000..f7d3104de6d4
--- /dev/null
+++ b/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2011 Christian König.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors:
+ * Christian König <deathsimple@vodafone.de>
+ */
+#include "drmP.h"
+#include "drm.h"
+#include "radeon.h"
+
+static int allocate_semaphores(struct radeon_device *rdev)
+{
+ const unsigned long bo_size = PAGE_SIZE * 4;
+
+ struct radeon_bo *bo;
+ struct list_head new_entrys;
+ unsigned long irq_flags;
+ uint64_t gpu_addr;
+ void *map;
+ int i, r;
+
+ 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;
+ }
+ memset(map, 0, bo_size);
+ radeon_bo_kunmap(bo);
+
+ r = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
+ if (r) {
+ radeon_bo_unreserve(bo);
+ radeon_bo_unref(&bo);
+ dev_err(rdev->dev, "(%d) semaphore pin failed\n", r);
+ 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 += 8;
+ list_add_tail(&sem->list, &new_entrys);
+ }
+
+ 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);
+ write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
+
+ DRM_INFO("%d new semaphores allocated\n", (int)(bo_size/8));
+
+ return 0;
+}
+
+int radeon_semaphore_create(struct radeon_device *rdev,
+ struct radeon_semaphore **semaphore)
+{
+ unsigned long irq_flags;
+
+ 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);
+ }
+
+ *semaphore = list_first_entry(&rdev->semaphore_drv.free, struct radeon_semaphore, list);
+ list_del(&(*semaphore)->list);
+
+ write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
+ return 0;
+}
+
+void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
+ struct radeon_semaphore *semaphore)
+{
+ radeon_semaphore_ring_emit(rdev, semaphore, ring, false);
+}
+
+void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
+ struct radeon_semaphore *semaphore)
+{
+ radeon_semaphore_ring_emit(rdev, semaphore, ring, true);
+}
+
+void radeon_semaphore_free(struct radeon_device *rdev,
+ 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);
+ 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;
+ 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);
+ }
+ 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);
+ }
+}