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cfc5bac059
nvgpu_writel_check outputs dbg message if updated read value does not match with requested write value. Change dbg message to error message. Use BUG_ON for write mismatch as failure to update h/w register is a bug and tells s/w to either add fixed delay or use timeout to check for updated register value. JIRA NVGPU-5490 Change-Id: Ib11b7862d2990a56259d2f8c10d75c12c84bae5d Signed-off-by: Seema Khowala <seemaj@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2338004 Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com> Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
/*
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* Copyright (c) 2018-2020, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <nvgpu/io.h>
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#include <nvgpu/types.h>
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#include <nvgpu/bug.h>
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#include <nvgpu/gk20a.h>
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void nvgpu_writel_check(struct gk20a *g, u32 r, u32 v)
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{
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u32 read_val = 0U;
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nvgpu_writel(g, r, v);
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read_val = nvgpu_readl(g, r);
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if (v != read_val) {
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nvgpu_err(g, "r=0x%x rd=0x%x wr=0x%x (mismatch)",
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r, read_val, v);
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BUG_ON(1);
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}
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}
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