mlxsw: pci: Do not setup tasklet from operation

Currently, the structure 'mlxsw_pci_queue_ops' holds a pointer to the
callback function of tasklet. This is used only for EQ and CQ. mlxsw
driver will use NAPI in a following patch set, so CQ will not use tasklet
anymore. As preparation, remove this pointer from the shared operation
structure and setup the tasklet as part of queue initialization.
For now, setup tasklet for EQ and CQ. Later, CQ code will be changed.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/a326cae5fc1ad085a1a063c004983de6fe389414.1712062203.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlxsw/pci.c

@@ -742,6 +742,7 @@ static int mlxsw_pci_cq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
 	err = mlxsw_cmd_sw2hw_cq(mlxsw_pci->core, mbox, q->num);
 	if (err)
 		return err;
+	tasklet_setup(&q->tasklet, mlxsw_pci_cq_tasklet);
 	mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
 	mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
 	return 0;
@@ -866,6 +867,7 @@ static int mlxsw_pci_eq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
 	err = mlxsw_cmd_sw2hw_eq(mlxsw_pci->core, mbox, q->num);
 	if (err)
 		return err;
+	tasklet_setup(&q->tasklet, mlxsw_pci_eq_tasklet);
 	mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
 	mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
 	return 0;
@@ -886,7 +888,6 @@ struct mlxsw_pci_queue_ops {
 		    struct mlxsw_pci_queue *q);
 	void (*fini)(struct mlxsw_pci *mlxsw_pci,
 		     struct mlxsw_pci_queue *q);
-	void (*tasklet)(struct tasklet_struct *t);
 	u16 (*elem_count_f)(const struct mlxsw_pci_queue *q);
 	u8 (*elem_size_f)(const struct mlxsw_pci_queue *q);
 	u16 elem_count;
@@ -914,7 +915,6 @@ static const struct mlxsw_pci_queue_ops mlxsw_pci_cq_ops = {
 	.pre_init	= mlxsw_pci_cq_pre_init,
 	.init		= mlxsw_pci_cq_init,
 	.fini		= mlxsw_pci_cq_fini,
-	.tasklet	= mlxsw_pci_cq_tasklet,
 	.elem_count_f	= mlxsw_pci_cq_elem_count,
 	.elem_size_f	= mlxsw_pci_cq_elem_size
 };
@@ -923,7 +923,6 @@ static const struct mlxsw_pci_queue_ops mlxsw_pci_eq_ops = {
 	.type		= MLXSW_PCI_QUEUE_TYPE_EQ,
 	.init		= mlxsw_pci_eq_init,
 	.fini		= mlxsw_pci_eq_fini,
-	.tasklet	= mlxsw_pci_eq_tasklet,
 	.elem_count	= MLXSW_PCI_EQE_COUNT,
 	.elem_size	= MLXSW_PCI_EQE_SIZE
 };
@@ -948,9 +947,6 @@ static int mlxsw_pci_queue_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
 	q->type = q_ops->type;
 	q->pci = mlxsw_pci;
 
-	if (q_ops->tasklet)
-		tasklet_setup(&q->tasklet, q_ops->tasklet);
-
 	mem_item->size = MLXSW_PCI_AQ_SIZE;
 	mem_item->buf = dma_alloc_coherent(&mlxsw_pci->pdev->dev,
 					   mem_item->size, &mem_item->mapaddr,