mlx4_core: resource tracking for HCA resources used by guests

The resource tracker is used to track usage of HCA resources by the different
guests.

Virtual functions (VFs) are attached to guest operating systems but
resources are allocated from the same pool and are assigned to VFs. It is
essential that hostile/buggy guests not be able to affect the operation of
other VFs, possibly attached to other guest OSs since ConnectX firmware is not
tolerant to misuse of resources.

The resource tracker module associates each resource with a VF and maintains
state information for the allocated object. It also defines allowed state
transitions and enforces them.

Relationships between resources are also referred to. For example, CQs are
pointed to by QPs, so it is forbidden to destroy a CQ if a QP refers to it.

ICM memory is always accessible through the primary function and hence it is
allocated by the owner of the primary function.

When a guest dies, an FLR is generated for all the VFs it owns and all the
resources it used are freed.

The tracked resource types are: QPs, CQs, SRQs, MPTs, MTTs, MACs, RES_EQs,
and XRCDNs.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 23 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
index dd9211f..475f9d6 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
@@ -44,27 +44,6 @@
 #include "mlx4.h"
 #include "icm.h"
 
-struct mlx4_cq_context {
-	__be32			flags;
-	u16			reserved1[3];
-	__be16			page_offset;
-	__be32			logsize_usrpage;
-	__be16			cq_period;
-	__be16			cq_max_count;
-	u8			reserved2[3];
-	u8			comp_eqn;
-	u8			log_page_size;
-	u8			reserved3[2];
-	u8			mtt_base_addr_h;
-	__be32			mtt_base_addr_l;
-	__be32			last_notified_index;
-	__be32			solicit_producer_index;
-	__be32			consumer_index;
-	__be32			producer_index;
-	u32			reserved4[2];
-	__be64			db_rec_addr;
-};
-
 #define MLX4_CQ_STATUS_OK		( 0 << 28)
 #define MLX4_CQ_STATUS_OVERFLOW		( 9 << 28)
 #define MLX4_CQ_STATUS_WRITE_FAIL	(10 << 28)
@@ -189,7 +168,7 @@ int mlx4_cq_resize(struct mlx4_dev *dev, struct mlx4_cq *cq,
 }
 EXPORT_SYMBOL_GPL(mlx4_cq_resize);
 
-static int __mlx4_cq_alloc_icm(struct mlx4_dev *dev, int *cqn)
+int __mlx4_cq_alloc_icm(struct mlx4_dev *dev, int *cqn)
 {
 	struct mlx4_priv *priv = mlx4_priv(dev);
 	struct mlx4_cq_table *cq_table = &priv->cq_table;
@@ -235,7 +214,7 @@ static int mlx4_cq_alloc_icm(struct mlx4_dev *dev, int *cqn)
 	return __mlx4_cq_alloc_icm(dev, cqn);
 }
 
-static void __mlx4_cq_free_icm(struct mlx4_dev *dev, int cqn)
+void __mlx4_cq_free_icm(struct mlx4_dev *dev, int cqn)
 {
 	struct mlx4_priv *priv = mlx4_priv(dev);
 	struct mlx4_cq_table *cq_table = &priv->cq_table;