diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
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committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c')
-rw-r--r-- | kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c new file mode 100644 index 000000000..9f95da4f0 --- /dev/null +++ b/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c @@ -0,0 +1,72 @@ +/* + * Copyright 2014 Advanced Micro Devices, Inc. + * Copyright 2008 Red Hat Inc. + * Copyright 2009 Jerome Glisse. + * + * 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, sublicense, + * 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 above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * 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 NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + */ +#include <drm/drmP.h> +#include "amdgpu.h" + +/* + * GPU scratch registers helpers function. + */ +/** + * amdgpu_gfx_scratch_get - Allocate a scratch register + * + * @adev: amdgpu_device pointer + * @reg: scratch register mmio offset + * + * Allocate a CP scratch register for use by the driver (all asics). + * Returns 0 on success or -EINVAL on failure. + */ +int amdgpu_gfx_scratch_get(struct amdgpu_device *adev, uint32_t *reg) +{ + int i; + + for (i = 0; i < adev->gfx.scratch.num_reg; i++) { + if (adev->gfx.scratch.free[i]) { + adev->gfx.scratch.free[i] = false; + *reg = adev->gfx.scratch.reg[i]; + return 0; + } + } + return -EINVAL; +} + +/** + * amdgpu_gfx_scratch_free - Free a scratch register + * + * @adev: amdgpu_device pointer + * @reg: scratch register mmio offset + * + * Free a CP scratch register allocated for use by the driver (all asics) + */ +void amdgpu_gfx_scratch_free(struct amdgpu_device *adev, uint32_t reg) +{ + int i; + + for (i = 0; i < adev->gfx.scratch.num_reg; i++) { + if (adev->gfx.scratch.reg[i] == reg) { + adev->gfx.scratch.free[i] = true; + return; + } + } +} |