iwlagn: bus layer chooses its transport layer

Remove iwl_transport_register which was a W/A. The bus layer knows what
transport to use. So now, the bus layer gives the upper layer a pointer to the
iwl_trans_ops struct that it wants to use. The upper layer then, allocates the
desired transport layer using iwl_trans_ops->alloc function.

As a result of this, priv->trans, no longer exists, priv holds a pointer to
iwl_shared, which holds a pointer to iwl_trans. This required to change all the
calls to the transport layer from upper layer. While we were at it, trans_X
inlines have been renamed to iwl_trans_X to avoid confusions, which of course
required to rename the functions inside the transport layer because of
conflicts in names. So the static API functions inside the transport layer
implementation have been renamed to iwl_trans_pcie_X.

Until now, the IRQ / Tasklet were initialized in iwl_transport_layer. This is
confusing since the registration doesn't mean to request IRQ, so I added a
handler for that.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 50 insertions, 33 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 7993aa7ae66..eec25b424de 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -69,9 +69,12 @@
 struct iwl_priv;
 struct iwl_rxon_context;
 struct iwl_host_cmd;
+struct iwl_shared;
 
 /**
  * struct iwl_trans_ops - transport specific operations
+ * @alloc: allocates the meta data (not the queues themselves)
+ * @request_irq: requests IRQ - will be called before the FW load in probe flow
  * @start_device: allocates and inits all the resources for the transport
  *                layer.
  * @prepare_card_hw: claim the ownership on the HW. Will be called during
@@ -98,6 +101,8 @@ struct iwl_host_cmd;
  */
 struct iwl_trans_ops {
 
+	struct iwl_trans *(*alloc)(struct iwl_shared *shrd);
+	int (*request_irq)(struct iwl_trans *iwl_trans);
 	int (*start_device)(struct iwl_priv *priv);
 	int (*prepare_card_hw)(struct iwl_priv *priv);
 	void (*stop_device)(struct iwl_priv *priv);
@@ -127,93 +132,105 @@ struct iwl_trans_ops {
 
 struct iwl_trans {
 	const struct iwl_trans_ops *ops;
-	struct iwl_priv *priv;
+	struct iwl_shared *shrd;
+
+	/* pointer to trans specific struct */
+	/*Ensure that this pointer will always be aligned to sizeof pointer */
+	char trans_specific[0] __attribute__((__aligned__(sizeof(void *))));
 };
 
-static inline int trans_start_device(struct iwl_trans *trans)
+static inline int iwl_trans_request_irq(struct iwl_trans *trans)
+{
+	return trans->ops->request_irq(trans);
+}
+
+static inline int iwl_trans_start_device(struct iwl_trans *trans)
 {
-	return trans->ops->start_device(trans->priv);
+	return trans->ops->start_device(priv(trans));
 }
 
-static inline int trans_prepare_card_hw(struct iwl_trans *trans)
+static inline int iwl_trans_prepare_card_hw(struct iwl_trans *trans)
 {
-	return trans->ops->prepare_card_hw(trans->priv);
+	return trans->ops->prepare_card_hw(priv(trans));
 }
 
-static inline void trans_stop_device(struct iwl_trans *trans)
+static inline void iwl_trans_stop_device(struct iwl_trans *trans)
 {
-	trans->ops->stop_device(trans->priv);
+	trans->ops->stop_device(priv(trans));
 }
 
-static inline void trans_tx_start(struct iwl_trans *trans)
+static inline void iwl_trans_tx_start(struct iwl_trans *trans)
 {
-	trans->ops->tx_start(trans->priv);
+	trans->ops->tx_start(priv(trans));
 }
 
-static inline void trans_rx_free(struct iwl_trans *trans)
+static inline void iwl_trans_rx_free(struct iwl_trans *trans)
 {
-	trans->ops->rx_free(trans->priv);
+	trans->ops->rx_free(priv(trans));
 }
 
-static inline void trans_tx_free(struct iwl_trans *trans)
+static inline void iwl_trans_tx_free(struct iwl_trans *trans)
 {
-	trans->ops->tx_free(trans->priv);
+	trans->ops->tx_free(priv(trans));
 }
 
-static inline int trans_send_cmd(struct iwl_trans *trans,
+static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
 				struct iwl_host_cmd *cmd)
 {
-	return trans->ops->send_cmd(trans->priv, cmd);
+	return trans->ops->send_cmd(priv(trans), cmd);
 }
 
-static inline int trans_send_cmd_pdu(struct iwl_trans *trans, u8 id, u32 flags,
-					u16 len, const void *data)
+static inline int iwl_trans_send_cmd_pdu(struct iwl_trans *trans, u8 id,
+					u32 flags, u16 len, const void *data)
 {
-	return trans->ops->send_cmd_pdu(trans->priv, id, flags, len, data);
+	return trans->ops->send_cmd_pdu(priv(trans), id, flags, len, data);
 }
 
-static inline struct iwl_tx_cmd *trans_get_tx_cmd(struct iwl_trans *trans,
+static inline struct iwl_tx_cmd *iwl_trans_get_tx_cmd(struct iwl_trans *trans,
 					int txq_id)
 {
-	return trans->ops->get_tx_cmd(trans->priv, txq_id);
+	return trans->ops->get_tx_cmd(priv(trans), txq_id);
 }
 
-static inline int trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
+static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
 		struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu,
 		struct iwl_rxon_context *ctx)
 {
-	return trans->ops->tx(trans->priv, skb, tx_cmd, txq_id, fc, ampdu, ctx);
+	return trans->ops->tx(priv(trans), skb, tx_cmd, txq_id, fc, ampdu, ctx);
 }
 
-static inline int trans_txq_agg_disable(struct iwl_trans *trans, u16 txq_id,
+static inline int iwl_trans_txq_agg_disable(struct iwl_trans *trans, u16 txq_id,
 			  u16 ssn_idx, u8 tx_fifo)
 {
-	return trans->ops->txq_agg_disable(trans->priv, txq_id,
+	return trans->ops->txq_agg_disable(priv(trans), txq_id,
 					   ssn_idx, tx_fifo);
 }
 
-static inline void trans_txq_agg_setup(struct iwl_trans *trans, int sta_id,
+static inline void iwl_trans_txq_agg_setup(struct iwl_trans *trans, int sta_id,
 						int tid, int frame_limit)
 {
-	trans->ops->txq_agg_setup(trans->priv, sta_id, tid, frame_limit);
+	trans->ops->txq_agg_setup(priv(trans), sta_id, tid, frame_limit);
 }
 
-static inline void trans_kick_nic(struct iwl_trans *trans)
+static inline void iwl_trans_kick_nic(struct iwl_trans *trans)
 {
-	trans->ops->kick_nic(trans->priv);
+	trans->ops->kick_nic(priv(trans));
 }
 
-static inline void trans_sync_irq(struct iwl_trans *trans)
+static inline void iwl_trans_sync_irq(struct iwl_trans *trans)
 {
-	trans->ops->sync_irq(trans->priv);
+	trans->ops->sync_irq(priv(trans));
 }
 
-static inline void trans_free(struct iwl_trans *trans)
+static inline void iwl_trans_free(struct iwl_trans *trans)
 {
-	trans->ops->free(trans->priv);
+	trans->ops->free(priv(trans));
 }
 
-int iwl_trans_register(struct iwl_trans *trans, struct iwl_priv *priv);
+/*****************************************************
+* Transport layers implementations
+******************************************************/
+extern const struct iwl_trans_ops trans_ops_pcie;
 
 /*TODO: this functions should NOT be exported from trans module - export it
  * until the reclaim flow will be brought to the transport module too */