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2ad015f7a5
Currently, nvgpu_writel_loop() writes to a register and immediately checks if register value is updated. It might take some time for hardware registers to get updated with value written by software. Modify nvgpu_writel_loop() to accept number of retries to check if register value is updated and assert with nvgpu_assert(). Also, move nvgpu_writel_loop() to common code and use generic nvgpu_readl() and nvgpu_writel() APIs. JIRA NVGPU-5490 Change-Id: Iaaf24203a91eee3d05de7d0c7dea18113367de5f Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2348628 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: Vaibhav Kachore <vkachore@nvidia.com> Reviewed-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
55 lines
1.8 KiB
C
55 lines
1.8 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/static_analysis.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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nvgpu_assert(v == read_val);
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}
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}
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void nvgpu_writel_loop(struct gk20a *g, u32 r, u32 v, u32 retries)
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{
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u32 reg_val = 0U;
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nvgpu_writel(g, r, v);
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do {
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retries = nvgpu_safe_sub_u32(retries, 1U);
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reg_val = nvgpu_readl(g, r);
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} while ((reg_val != v) && (retries > 0U));
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nvgpu_assert(reg_val == v);
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}
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