From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/amd/amdkfd/kfd_pasid.c | 70 ++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_pasid.c (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_pasid.c') diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c b/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c new file mode 100644 index 0000000000..e3b250918f --- /dev/null +++ b/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/* + * Copyright 2014-2022 Advanced Micro Devices, Inc. + * + * 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 +#include "kfd_priv.h" +#include "amdgpu_ids.h" + +static unsigned int pasid_bits = 16; +static bool pasids_allocated; /* = false */ + +bool kfd_set_pasid_limit(unsigned int new_limit) +{ + if (new_limit < 2) + return false; + + if (new_limit < (1U << pasid_bits)) { + if (pasids_allocated) + /* We've already allocated user PASIDs, too late to + * change the limit + */ + return false; + + while (new_limit < (1U << pasid_bits)) + pasid_bits--; + } + + return true; +} + +unsigned int kfd_get_pasid_limit(void) +{ + return 1U << pasid_bits; +} + +u32 kfd_pasid_alloc(void) +{ + int r = amdgpu_pasid_alloc(pasid_bits); + + if (r > 0) { + pasids_allocated = true; + return r; + } + + return 0; +} + +void kfd_pasid_free(u32 pasid) +{ + amdgpu_pasid_free(pasid); +} -- cgit v1.2.3