qed*: Handle-based L2-queues.

The driver needs to maintain several FW/HW-indices for each one of
its queues. Currently, that mapping is done by the QED where it uses
an rx/tx array of so-called hw-cids, populating them whenever a new
queue is opened and clearing them upon destruction of said queues.

This maintenance is far from ideal - there's no real reason why
QED needs to maintain such a data-structure. It becomes even worse
when considering the fact that the PF's queues and its child VFs' queues
are all mapped into the same data-structure.
As a by-product, the set of parameters an interface needs to supply for
queue APIs is non-trivial, and some of the variables in the API
structures have different meaning depending on their exact place
in the configuration flow.

This patch re-organizes the way L2 queues are configured and maintained.
In short:
  - Required parameters for queue init are now well-defined.
  - Qed would allocate a queue-cid based on parameters.
    Upon initialization success, it would return a handle to caller.
  - Queue-handle would be maintained by entity requesting queue-init,
    not necessarily qed.
  - All further queue-APIs [update, destroy] would use the opaque
    handle as reference for the queue instead of various indices.

The possible owners of such handles:
  - PF queues [qede] - complete handles based on provided configuration.
  - VF queues [qede] - fw-context-less handles, containing only relative
    information; Only the PF-side would need the absolute indices
    for configuration, so they're omitted here.
  - VF queues [qed, PF-side] - complete handles based on VF initialization.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed.h

@@ -241,15 +241,6 @@ struct qed_hw_info {
 	enum qed_wol_support b_wol_support;
 };
 
-struct qed_hw_cid_data {
-	u32	cid;
-	bool	b_cid_allocated;
-
-	/* Additional identifiers */
-	u16	opaque_fid;
-	u8	vport_id;
-};
-
 /* maximun size of read/write commands (HW limit) */
 #define DMAE_MAX_RW_SIZE        0x2000
 
@@ -416,9 +407,6 @@ struct qed_hwfn {
 
 	struct qed_dcbx_info		*p_dcbx_info;
 
-	struct qed_hw_cid_data		*p_tx_cids;
-	struct qed_hw_cid_data		*p_rx_cids;
-
 	struct qed_dmae_info		dmae_info;
 
 	/* QM init */

drivers/net/ethernet/qlogic/qed/qed_dev.c

@@ -134,15 +134,6 @@ void qed_resc_free(struct qed_dev *cdev)
 
 	kfree(cdev->reset_stats);
 
-	for_each_hwfn(cdev, i) {
-		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
-
-		kfree(p_hwfn->p_tx_cids);
-		p_hwfn->p_tx_cids = NULL;
-		kfree(p_hwfn->p_rx_cids);
-		p_hwfn->p_rx_cids = NULL;
-	}
-
 	for_each_hwfn(cdev, i) {
 		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
 
@@ -425,23 +416,6 @@ int qed_resc_alloc(struct qed_dev *cdev)
 	if (!cdev->fw_data)
 		return -ENOMEM;
 
-	/* Allocate Memory for the Queue->CID mapping */
-	for_each_hwfn(cdev, i) {
-		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
-		int tx_size = sizeof(struct qed_hw_cid_data) *
-				     RESC_NUM(p_hwfn, QED_L2_QUEUE);
-		int rx_size = sizeof(struct qed_hw_cid_data) *
-				     RESC_NUM(p_hwfn, QED_L2_QUEUE);
-
-		p_hwfn->p_tx_cids = kzalloc(tx_size, GFP_KERNEL);
-		if (!p_hwfn->p_tx_cids)
-			goto alloc_no_mem;
-
-		p_hwfn->p_rx_cids = kzalloc(rx_size, GFP_KERNEL);
-		if (!p_hwfn->p_rx_cids)
-			goto alloc_no_mem;
-	}
-
 	for_each_hwfn(cdev, i) {
 		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
 		u32 n_eqes, num_cons;