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, 399 insertions, 6 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 9c0bdcabaea0..bce0579a2855 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -172,12 +172,6 @@ static void mlx4_comm_cmd_post(struct mlx4_dev *dev, u8 cmd, u16 param)
 	mmiowb();
 }
 
-/* dummy procedure for this patch */
-int mlx4_GEN_EQE(struct mlx4_dev *dev, int slave, struct mlx4_eqe *eqe)
-{
-	return 0;
-}
-
 static int mlx4_comm_cmd_poll(struct mlx4_dev *dev, u8 cmd, u16 param,
 		       unsigned long timeout)
 {
@@ -614,6 +608,403 @@ static struct mlx4_cmd_info cmd_info[] = {
 		.verify = NULL,
 		.wrapper = NULL
 	},
+	{
+		.opcode = MLX4_CMD_QUERY_FUNC_CAP,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_QUERY_FUNC_CAP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_ADAPTER,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = NULL
+	},
+	{
+		.opcode = MLX4_CMD_INIT_PORT,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_INIT_PORT_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_CLOSE_PORT,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm  = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_CLOSE_PORT_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_PORT,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_QUERY_PORT_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_MAP_EQ,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_MAP_EQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SW2HW_EQ,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = true,
+		.verify = NULL,
+		.wrapper = mlx4_SW2HW_EQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_HW_HEALTH_CHECK,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = NULL
+	},
+	{
+		.opcode = MLX4_CMD_NOP,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = NULL
+	},
+	{
+		.opcode = MLX4_CMD_ALLOC_RES,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = true,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_ALLOC_RES_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_FREE_RES,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_FREE_RES_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SW2HW_MPT,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = true,
+		.verify = NULL,
+		.wrapper = mlx4_SW2HW_MPT_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_MPT,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_QUERY_MPT_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_HW2SW_MPT,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_HW2SW_MPT_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_READ_MTT,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = NULL
+	},
+	{
+		.opcode = MLX4_CMD_WRITE_MTT,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_WRITE_MTT_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SYNC_TPT,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = NULL
+	},
+	{
+		.opcode = MLX4_CMD_HW2SW_EQ,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = true,
+		.verify = NULL,
+		.wrapper = mlx4_HW2SW_EQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_EQ,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = true,
+		.verify = NULL,
+		.wrapper = mlx4_QUERY_EQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SW2HW_CQ,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = true,
+		.verify = NULL,
+		.wrapper = mlx4_SW2HW_CQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_HW2SW_CQ,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_HW2SW_CQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_CQ,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_QUERY_CQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_MODIFY_CQ,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = true,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_MODIFY_CQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SW2HW_SRQ,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = true,
+		.verify = NULL,
+		.wrapper = mlx4_SW2HW_SRQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_HW2SW_SRQ,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_HW2SW_SRQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_SRQ,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_QUERY_SRQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_ARM_SRQ,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_ARM_SRQ_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_RST2INIT_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = true,
+		.verify = NULL,
+		.wrapper = mlx4_RST2INIT_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_INIT2INIT_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_INIT2RTR_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_INIT2RTR_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_RTR2RTS_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_RTS2RTS_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SQERR2RTS_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_2ERR_QP,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_RTS2SQD_QP,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SQD2SQD_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SQD2RTS_QP,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_2RST_QP,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_2RST_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_QP,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_SUSPEND_QP,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_UNSUSPEND_QP,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_GEN_QP_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_QUERY_IF_STAT,
+		.has_inbox = false,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_QUERY_IF_STAT_wrapper
+	},
+	/* Native multicast commands are not available for guests */
+	{
+		.opcode = MLX4_CMD_QP_ATTACH,
+		.has_inbox = true,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = mlx4_QP_ATTACH_wrapper
+	},
+	{
+		.opcode = MLX4_CMD_INFORM_FLR_DONE,
+		.has_inbox = false,
+		.has_outbox = false,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = NULL
+	},
 };
 
 static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
@@ -877,6 +1268,8 @@ static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
 	return;
 
 reset_slave:
+	/* cleanup any slave resources */
+	mlx4_delete_all_resources_for_slave(dev, slave);
 	spin_lock(&priv->mfunc.master.slave_state_lock);
 	if (!slave_state[slave].is_slave_going_down)
 		slave_state[slave].last_cmd = MLX4_COMM_CMD_RESET;