From: Oded Gabbay <ogabbay@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: SW_Drivers@habana.ai
Subject: [PATCH] habanalabs: restore vm_pgoff after mmap
Date: Wed, 4 Nov 2020 16:09:05 +0200 [thread overview]
Message-ID: <20201104140908.10178-9-ogabbay@kernel.org> (raw)
In-Reply-To: <20201104140908.10178-1-ogabbay@kernel.org>
Due to using dma_mmap_coherent() to perform mmap of dma memory, we
had to clear the vm_pgoff field before calling that function.
However, that broke the userspace (profiler tool) as they relied
on searching the /proc/self/maps for these values to correctly
"disassemble" the topology recipe.
To re-enable that functionality, the driver can simply restore the
value of vm_pgoff before returning to userspace but after calling
dma_mmap_coherent().
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
drivers/misc/habanalabs/common/command_buffer.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/misc/habanalabs/common/command_buffer.c b/drivers/misc/habanalabs/common/command_buffer.c
index 360dc340b2f4..b30249e4d3b7 100644
--- a/drivers/misc/habanalabs/common/command_buffer.c
+++ b/drivers/misc/habanalabs/common/command_buffer.c
@@ -518,6 +518,7 @@ int hl_cb_mmap(struct hl_fpriv *hpriv, struct vm_area_struct *vma)
}
cb->mmap_size = cb->size;
+ vma->vm_pgoff = handle;
return 0;
--
2.17.1
next prev parent reply other threads:[~2020-11-04 14:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-04 14:08 [PATCH] habanalabs: add 'needs reset' state in driver Oded Gabbay
2020-11-04 14:08 ` [PATCH] habanalabs: fix hard reset print and comment Oded Gabbay
2020-11-04 14:08 ` [PATCH] habanalabs/gaudi: increase MAX CS to 16K Oded Gabbay
2020-11-04 14:09 ` [PATCH] habanalabs/gaudi: remove pcie_en strap toggle Oded Gabbay
2020-11-04 14:09 ` [PATCH] habanalabs: Move repeatedly included headers to habanalabs.h Oded Gabbay
2020-11-04 14:09 ` [PATCH] habanalabs: release signal if collective wait was dropped Oded Gabbay
2020-11-04 14:09 ` [PATCH] habanalabs: remove duplicate print Oded Gabbay
2020-11-04 14:09 ` [PATCH] habanalabs: reset device upon fw read failure Oded Gabbay
2020-11-04 14:09 ` Oded Gabbay [this message]
2020-11-04 14:09 ` [PATCH] habanalabs: Separate CS job completion from its deallocation Oded Gabbay
2020-11-04 14:09 ` [PATCH] habanalabs: Skip updating CI of internal queues if not in use Oded Gabbay
2020-11-04 14:09 ` [PATCH] habanalabs: Small refactoring of cs_do_release() Oded Gabbay
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