From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/gpu/drm/radeon/radeon_semaphore.c | 106 +++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 kernel/drivers/gpu/drm/radeon/radeon_semaphore.c (limited to 'kernel/drivers/gpu/drm/radeon/radeon_semaphore.c') diff --git a/kernel/drivers/gpu/drm/radeon/radeon_semaphore.c b/kernel/drivers/gpu/drm/radeon/radeon_semaphore.c new file mode 100644 index 000000000..e6ad54cdf --- /dev/null +++ b/kernel/drivers/gpu/drm/radeon/radeon_semaphore.c @@ -0,0 +1,106 @@ +/* + * 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 + */ +#include +#include "radeon.h" +#include "radeon_trace.h" + +int radeon_semaphore_create(struct radeon_device *rdev, + struct radeon_semaphore **semaphore) +{ + int r; + + *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); + if (*semaphore == NULL) { + return -ENOMEM; + } + r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, + &(*semaphore)->sa_bo, 8, 8); + 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; +} + +bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx, + struct radeon_semaphore *semaphore) +{ + struct radeon_ring *ring = &rdev->ring[ridx]; + + trace_radeon_semaphore_signale(ridx, semaphore); + + if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) { + --semaphore->waiters; + + /* for debugging lockup only, used by sysfs debug files */ + ring->last_semaphore_signal_addr = semaphore->gpu_addr; + return true; + } + return false; +} + +bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx, + struct radeon_semaphore *semaphore) +{ + struct radeon_ring *ring = &rdev->ring[ridx]; + + trace_radeon_semaphore_wait(ridx, semaphore); + + if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) { + ++semaphore->waiters; + + /* for debugging lockup only, used by sysfs debug files */ + ring->last_semaphore_wait_addr = semaphore->gpu_addr; + return true; + } + return false; +} + +void radeon_semaphore_free(struct radeon_device *rdev, + struct radeon_semaphore **semaphore, + struct radeon_fence *fence) +{ + if (semaphore == NULL || *semaphore == NULL) { + return; + } + if ((*semaphore)->waiters > 0) { + dev_err(rdev->dev, "semaphore %p has more waiters than signalers," + " hardware lockup imminent!\n", *semaphore); + } + radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence); + kfree(*semaphore); + *semaphore = NULL; +} -- cgit 1.2.3-korg