/**
* DOC: Number of entries per queue
*
- * After research it was concluded that 12 entries in a RX and TX
- * queue would be sufficient. Although this is almost one third of
- * the amount the legacy driver allocated, the queues aren't getting
- * filled to the maximum even when working with the maximum rate.
+ * Under normal load without fragmentation 12 entries are sufficient
+ * without the queue being filled up to the maximum. When using fragmentation
+ * and the queue threshold code we need to add some additional margins to
+ * make sure the queue will never (or only under extreme load) fill up
+ * completely.
+ * Since we don't use preallocated DMA having a large number of queue entries
+ * will have only minimal impact on the memory requirements for the queue.
*/
-#define RX_ENTRIES 12
-#define TX_ENTRIES 12
+#define RX_ENTRIES 24
+#define TX_ENTRIES 24
#define BEACON_ENTRIES 1
-#define ATIM_ENTRIES 1
+#define ATIM_ENTRIES 8
/**
* enum data_queue_qid: Queue identification
/**
* enum skb_frame_desc_flags: Flags for &struct skb_frame_desc
*
- * @FRAME_DESC_DRIVER_GENERATED: Frame was generated inside driver
- * and should not be reported back to mac80211 during txdone.
+ * @SKBDESC_DMA_MAPPED_RX: &skb_dma field has been mapped for RX
+ * @SKBDESC_DMA_MAPPED_TX: &skb_dma field has been mapped for TX
*/
enum skb_frame_desc_flags {
- FRAME_DESC_DRIVER_GENERATED = 1 << 0,
+ SKBDESC_DMA_MAPPED_RX = (1 << 0),
+ SKBDESC_DMA_MAPPED_TX = (1 << 1),
};
/**
* this structure should not exceed the size of that array (40 bytes).
*
* @flags: Frame flags, see &enum skb_frame_desc_flags.
- * @data: Pointer to data part of frame (Start of ieee80211 header).
+ * @desc_len: Length of the frame descriptor.
* @desc: Pointer to descriptor part of the frame.
* Note that this pointer could point to something outside
* of the scope of the skb->data pointer.
- * @data_len: Length of the frame data.
- * @desc_len: Length of the frame descriptor.
+ * @skb_dma: (PCI-only) the DMA address associated with the sk buffer.
* @entry: The entry to which this sk buffer belongs.
*/
struct skb_frame_desc {
unsigned int flags;
- unsigned short data_len;
- unsigned short desc_len;
-
- void *data;
+ unsigned int desc_len;
void *desc;
+ dma_addr_t skb_dma;
+
struct queue_entry *entry;
};
*
* Summary of information that has been read from the RX frame descriptor.
*
+ * @timestamp: RX Timestamp
* @signal: Signal of the received frame.
* @rssi: RSSI of the received frame.
* @size: Data size of the received frame.
*/
struct rxdone_entry_desc {
+ u64 timestamp;
int signal;
int rssi;
int size;
* index corruption due to concurrency.
* @count: Number of frames handled in the queue.
* @limit: Maximum number of entries in the queue.
+ * @threshold: Minimum number of free entries before queue is kicked by force.
* @length: Number of frames in queue.
* @index: Index pointers to entry positions in the queue,
* use &enum queue_index to get a specific index field.
spinlock_t lock;
unsigned int count;
unsigned short limit;
+ unsigned short threshold;
unsigned short length;
unsigned short index[Q_INDEX_MAX];
return queue->limit - queue->length;
}
+/**
+ * rt2x00queue_threshold - Check if the queue is below threshold
+ * @queue: Queue to check.
+ */
+static inline int rt2x00queue_threshold(struct data_queue *queue)
+{
+ return rt2x00queue_available(queue) < queue->threshold;
+}
+
/**
* rt2x00_desc_read - Read a word from the hardware descriptor.
* @desc: Base descriptor address