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path: root/drivers/net/wireless/iwlwifi/iwl-trans.h
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-trans.h')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-trans.h56
1 files changed, 45 insertions, 11 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 79a1e7ae4995..00efde8e5536 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -154,6 +154,9 @@ struct iwl_cmd_header {
__le16 sequence;
} __packed;
+/* iwl_cmd_header flags value */
+#define IWL_CMD_FAILED_MSK 0x40
+
#define FH_RSCSR_FRAME_SIZE_MSK 0x00003FFF /* bits 0-13 */
#define FH_RSCSR_FRAME_INVALID 0x55550000
@@ -280,6 +283,8 @@ static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
#define MAX_NO_RECLAIM_CMDS 6
+#define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
+
/*
* Maximum number of HW queues the transport layer
* currently supports
@@ -350,10 +355,10 @@ struct iwl_trans;
* Must be atomic
* @reclaim: free packet until ssn. Returns a list of freed packets.
* Must be atomic
- * @tx_agg_setup: setup a tx queue for AMPDU - will be called once the HW is
+ * @txq_enable: setup a tx queue for AMPDU - will be called once the HW is
* ready and a successful ADDBA response has been received.
* May sleep
- * @tx_agg_disable: de-configure a Tx queue to send AMPDUs
+ * @txq_disable: de-configure a Tx queue to send AMPDUs
* Must be atomic
* @wait_tx_queue_empty: wait until all tx queues are empty
* May sleep
@@ -386,9 +391,9 @@ struct iwl_trans_ops {
void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
struct sk_buff_head *skbs);
- void (*tx_agg_setup)(struct iwl_trans *trans, int queue, int fifo,
- int sta_id, int tid, int frame_limit, u16 ssn);
- void (*tx_agg_disable)(struct iwl_trans *trans, int queue);
+ void (*txq_enable)(struct iwl_trans *trans, int queue, int fifo,
+ int sta_id, int tid, int frame_limit, u16 ssn);
+ void (*txq_disable)(struct iwl_trans *trans, int queue);
int (*dbgfs_register)(struct iwl_trans *trans, struct dentry* dir);
int (*wait_tx_queue_empty)(struct iwl_trans *trans);
@@ -428,6 +433,11 @@ enum iwl_trans_state {
* @hw_id_str: a string with info about HW ID. Set during transport allocation.
* @pm_support: set to true in start_hw if link pm is supported
* @wait_command_queue: the wait_queue for SYNC host commands
+ * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
+ * The user should use iwl_trans_{alloc,free}_tx_cmd.
+ * @dev_cmd_headroom: room needed for the transport's private use before the
+ * device_cmd for Tx - for internal use only
+ * The user should use iwl_trans_{alloc,free}_tx_cmd.
*/
struct iwl_trans {
const struct iwl_trans_ops *ops;
@@ -445,6 +455,10 @@ struct iwl_trans {
wait_queue_head_t wait_command_queue;
+ /* The following fields are internal only */
+ struct kmem_cache *dev_cmd_pool;
+ size_t dev_cmd_headroom;
+
/* pointer to trans specific struct */
/*Ensure that this pointer will always be aligned to sizeof pointer */
char trans_specific[0] __aligned(sizeof(void *));
@@ -520,6 +534,26 @@ static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
return trans->ops->send_cmd(trans, cmd);
}
+static inline struct iwl_device_cmd *
+iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
+{
+ u8 *dev_cmd_ptr = kmem_cache_alloc(trans->dev_cmd_pool, GFP_ATOMIC);
+
+ if (unlikely(dev_cmd_ptr == NULL))
+ return NULL;
+
+ return (struct iwl_device_cmd *)
+ (dev_cmd_ptr + trans->dev_cmd_headroom);
+}
+
+static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
+ struct iwl_device_cmd *dev_cmd)
+{
+ u8 *dev_cmd_ptr = (u8 *)dev_cmd - trans->dev_cmd_headroom;
+
+ kmem_cache_free(trans->dev_cmd_pool, dev_cmd_ptr);
+}
+
static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
struct iwl_device_cmd *dev_cmd, int queue)
{
@@ -538,24 +572,24 @@ static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
trans->ops->reclaim(trans, queue, ssn, skbs);
}
-static inline void iwl_trans_tx_agg_disable(struct iwl_trans *trans, int queue)
+static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue)
{
WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
"%s bad state = %d", __func__, trans->state);
- trans->ops->tx_agg_disable(trans, queue);
+ trans->ops->txq_disable(trans, queue);
}
-static inline void iwl_trans_tx_agg_setup(struct iwl_trans *trans, int queue,
- int fifo, int sta_id, int tid,
- int frame_limit, u16 ssn)
+static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
+ int fifo, int sta_id, int tid,
+ int frame_limit, u16 ssn)
{
might_sleep();
WARN_ONCE(trans->state != IWL_TRANS_FW_ALIVE,
"%s bad state = %d", __func__, trans->state);
- trans->ops->tx_agg_setup(trans, queue, fifo, sta_id, tid,
+ trans->ops->txq_enable(trans, queue, fifo, sta_id, tid,
frame_limit, ssn);
}