[PATCH 5.10 137/406] drm/etnaviv: fix dumping of active MMU context

Greg Kroah-Hartman
2023-09-17T19:26:18Z

From: Lucas Stach <l.stach@pengutronix.de>

[ Upstream commit 20faf2005ec85fa1a6acc9a74ff27de667f90576 ]

gpu->mmu_context is the MMU context of the last job in the HW queue, which
isn't necessarily the same as the context from the bad job. Dump the MMU
context from the scheduler determined bad submit to make it work as intended.

Fixes: 17e4660ae3d7 ("drm/etnaviv: implement per-process address spaces on MMUv2")
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/etnaviv/etnaviv_dump.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
index 706af0304ca4c..7b57d01ba865b 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
@@ -125,9 +125,9 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
return;
etnaviv_dump_core = false;

- mutex_lock(&gpu->mmu_context->lock);
+ mutex_lock(&submit->mmu_context->lock);

- mmu_size = etnaviv_iommu_dump_size(gpu->mmu_context);
+ mmu_size = etnaviv_iommu_dump_size(submit->mmu_context);

/* We always dump registers, mmu, ring, hanging cmdbuf and end marker */
n_obj = 5;
@@ -157,7 +157,7 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN |
__GFP_NORETRY);
if (!iter.start) {
- mutex_unlock(&gpu->mmu_context->lock);
+ mutex_unlock(&submit->mmu_context->lock);
dev_warn(gpu->dev, "failed to allocate devcoredump file\n");
return;
}
@@ -169,18 +169,18 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
memset(iter.hdr, 0, iter.data - iter.start);

etnaviv_core_dump_registers(&iter, gpu);
- etnaviv_core_dump_mmu(&iter, gpu->mmu_context, mmu_size);
+ etnaviv_core_dump_mmu(&iter, submit->mmu_context, mmu_size);
etnaviv_core_dump_mem(&iter, ETDUMP_BUF_RING, gpu->buffer.vaddr,
gpu->buffer.size,
etnaviv_cmdbuf_get_va(&gpu->buffer,
- &gpu->mmu_context->cmdbuf_mapping));
+ &submit->mmu_context->cmdbuf_mapping));

etnaviv_core_dump_mem(&iter, ETDUMP_BUF_CMD,
submit->cmdbuf.vaddr, submit->cmdbuf.size,
etnaviv_cmdbuf_get_va(&submit->cmdbuf,
- &gpu->mmu_context->cmdbuf_mapping));
+ &submit->mmu_context->cmdbuf_mapping));

- mutex_unlock(&gpu->mmu_context->lock);
+ mutex_unlock(&submit->mmu_context->lock);

/* Reserve space for the bomap */
if (n_bomap_pages) {
--
2.40.1