linux-kernel - [PATCH 04/15] habanalabs: fix user mappings calculation in case of page fault

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Date:   Thu, 27 Oct 2022 12:09:56 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Dani Liberman <dliberman@...ana.ai>
Subject: [PATCH 04/15] habanalabs: fix user mappings calculation in case of page fault

From: Dani Liberman <dliberman@...ana.ai>

As there are 2 types of user mappings, pmmu and hmmu, calculate
only the relevant mappings for the requested type.

Signed-off-by: Dani Liberman <dliberman@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/device.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 0026fe42b3d2..0e88396744a1 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -2305,8 +2305,13 @@ static void hl_capture_user_mappings(struct hl_device *hdev, bool is_pmmu)
 	}
 
 	mutex_lock(&ctx->mem_hash_lock);
-	hash_for_each(ctx->mem_hash, i, hnode, node)
-		pgf_info->num_of_user_mappings++;
+	hash_for_each(ctx->mem_hash, i, hnode, node) {
+		vm_type = hnode->ptr;
+		if (((*vm_type == VM_TYPE_USERPTR) && is_pmmu) ||
+				((*vm_type == VM_TYPE_PHYS_PACK) && !is_pmmu))
+			pgf_info->num_of_user_mappings++;
+
+	}
 
 	if (!pgf_info->num_of_user_mappings)
 		goto finish;
-- 
2.25.1