From 3e358ea8614ddfbc59ca7a3f5dff5dde2b350b2c Mon Sep 17 00:00:00 2001
From: Mark Bloch <mbloch@nvidia.com>
Date: Thu, 13 Apr 2023 12:23:09 +0300
Subject: [PATCH 1/1] RDMA/mlx5: Fix flow counter query via DEVX
Git-commit: 3e358ea8614ddfbc59ca7a3f5dff5dde2b350b2c
Patch-mainline: v6.4-rc1
References: git-fixes

Commit cited in "fixes" tag added bulk support for flow counters but it
didn't account that's also possible to query a counter using a non-base id
if the counter was allocated as bulk.

When a user performs a query, validate the flow counter id given in the
mailbox is inside the valid range taking bulk value into account.

Fixes: 208d70f562e5 ("IB/mlx5: Support flow counters offset for bulk counters")
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Link: https://lore.kernel.org/r/79d7fbe291690128e44672418934256254d93115.1681377114.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Nicolas Morey <nmorey@suse.com>
---
 drivers/infiniband/hw/mlx5/devx.c | 31 ++++++++++++++++++++++++++-----
 include/linux/mlx5/mlx5_ifc.h     |  3 ++-
 2 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c
index 07037b829c7e..db5fb196c728 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -666,7 +666,21 @@ static bool devx_is_valid_obj_id(struct uverbs_attr_bundle *attrs,
 				      obj_id;
 
 	case MLX5_IB_OBJECT_DEVX_OBJ:
-		return ((struct devx_obj *)uobj->object)->obj_id == obj_id;
+	{
+		u16 opcode = MLX5_GET(general_obj_in_cmd_hdr, in, opcode);
+		struct devx_obj *devx_uobj = uobj->object;
+
+		if (opcode == MLX5_CMD_OP_QUERY_FLOW_COUNTER &&
+		    devx_uobj->flow_counter_bulk_size) {
+			u64 end;
+
+			end = devx_uobj->obj_id +
+				devx_uobj->flow_counter_bulk_size;
+			return devx_uobj->obj_id <= obj_id && end > obj_id;
+		}
+
+		return devx_uobj->obj_id == obj_id;
+	}
 
 	default:
 		return false;
@@ -1517,10 +1531,17 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_OBJ_CREATE)(
 		goto obj_free;
 
 	if (opcode == MLX5_CMD_OP_ALLOC_FLOW_COUNTER) {
-		u8 bulk = MLX5_GET(alloc_flow_counter_in,
-				   cmd_in,
-				   flow_counter_bulk);
-		obj->flow_counter_bulk_size = 128UL * bulk;
+		u32 bulk = MLX5_GET(alloc_flow_counter_in,
+				    cmd_in,
+				    flow_counter_bulk_log_size);
+
+		if (bulk)
+			bulk = 1 << bulk;
+		else
+			bulk = 128UL * MLX5_GET(alloc_flow_counter_in,
+						cmd_in,
+						flow_counter_bulk);
+		obj->flow_counter_bulk_size = bulk;
 	}
 
 	uobj->object = obj;
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index b54339a1b1c6..3976e6266bcc 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -9283,7 +9283,8 @@ struct mlx5_ifc_alloc_flow_counter_in_bits {
 	u8         reserved_at_20[0x10];
 	u8         op_mod[0x10];
 
-	u8         reserved_at_40[0x38];
+	u8         reserved_at_40[0x33];
+	u8         flow_counter_bulk_log_size[0x5];
 	u8         flow_counter_bulk[0x8];
 };
 
-- 
2.39.1.1.gbe015eda0162