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gpu: nvgpu: assume 1:1 IPA to PA mapping for syncpt

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Currently, hyp_read_ipa_pa_info() only translates IPA for RAM
mappings. It fails for MMIO mappings. In particular, it will
fail when attempting to translate addresses in the syncpoint
shim aperture. As a workaround, assume 1:1 IPA to PA mapping
when hyp_read_ipa_pa_info fails, and address is in syncpt
shim aperture.

Bug 2096877

Change-Id: I5267f0a8febf065157910ad3408374cacd398731
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1687796
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Thomas Fleury
2018-04-03 09:13:34 -07:00
committed by mobile promotions
parent 5ab3524f91
commit 86bb766e16
1 changed files with 15 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/gpu/nvgpu/common/linux/soc.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2017-2018, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -67,8 +67,21 @@ static u64 nvgpu_tegra_hv_ipa_pa(struct gk20a *g, u64 ipa)
err = hyp_read_ipa_pa_info(&info, platform->vmid, ipa);
if (err < 0) {
nvgpu_err(g, "ipa=%llx translation failed vmid=%u err=%d",
/* WAR for bug 2096877
* hyp_read_ipa_pa_info only looks up RAM mappings.
* assume one to one IPA:PA mapping for syncpt aperture
*/
u64 start = g->syncpt_unit_base;
u64 end = g->syncpt_unit_base + g->syncpt_unit_size;
if ((ipa >= start) && (ipa < end)) {
pa = ipa;
nvgpu_log(g, gpu_dbg_map_v,
"ipa=%llx vmid=%d -> pa=%llx (SYNCPT)\n",
ipa, platform->vmid, pa);
} else {
nvgpu_err(g, "ipa=%llx translation failed vmid=%u err=%d",
ipa, platform->vmid, err);
}
} else {
pa = info.base + info.offset;
nvgpu_log(g, gpu_dbg_map_v,