diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00queue.h')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00queue.h | 185 |
1 files changed, 91 insertions, 94 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.h b/drivers/net/wireless/rt2x00/rt2x00queue.h index d81d85f3486..c48125be0e3 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.h +++ b/drivers/net/wireless/rt2x00/rt2x00queue.h @@ -13,9 +13,7 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the - Free Software Foundation, Inc., - 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + along with this program; if not, see <http://www.gnu.org/licenses/>. */ /* @@ -43,40 +41,24 @@ #define AGGREGATION_SIZE 3840 /** - * DOC: Number of entries per queue - * - * 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 minimal impact on the memory requirements for the queue. - */ -#define RX_ENTRIES 24 -#define TX_ENTRIES 24 -#define BEACON_ENTRIES 1 -#define ATIM_ENTRIES 8 - -/** * enum data_queue_qid: Queue identification * + * @QID_AC_VO: AC VO queue + * @QID_AC_VI: AC VI queue * @QID_AC_BE: AC BE queue * @QID_AC_BK: AC BK queue - * @QID_AC_VI: AC VI queue - * @QID_AC_VO: AC VO queue * @QID_HCCA: HCCA queue * @QID_MGMT: MGMT queue (prio queue) * @QID_RX: RX queue * @QID_OTHER: None of the above (don't use, only present for completeness) * @QID_BEACON: Beacon queue (value unspecified, don't send it to device) - * @QID_ATIM: Atim queue (value unspeficied, don't send it to device) + * @QID_ATIM: Atim queue (value unspecified, don't send it to device) */ enum data_queue_qid { - QID_AC_BE = 0, - QID_AC_BK = 1, - QID_AC_VI = 2, - QID_AC_VO = 3, + QID_AC_VO = 0, + QID_AC_VI = 1, + QID_AC_BE = 2, + QID_AC_BK = 3, QID_HCCA = 4, QID_MGMT = 13, QID_RX = 14, @@ -233,6 +215,7 @@ enum txdone_entry_desc_flags { TXDONE_FALLBACK, TXDONE_FAILURE, TXDONE_EXCESSIVE_RETRY, + TXDONE_AMPDU, }; /** @@ -296,7 +279,6 @@ enum txentry_desc_flags { * Summary of information for the frame descriptor before sending a TX frame. * * @flags: Descriptor flags (See &enum queue_entry_flags). - * @qid: Queue identification (See &enum data_queue_qid). * @length: Length of the entire frame. * @header_length: Length of 802.11 header. * @length_high: PLCP length high word. @@ -304,16 +286,13 @@ enum txentry_desc_flags { * @signal: PLCP signal. * @service: PLCP service. * @msc: MCS. - * @stbc: STBC. - * @ba_size: BA size. + * @stbc: Use Space Time Block Coding (only available for MCS rates < 8). + * @ba_size: Size of the recepients RX reorder buffer - 1. * @rate_mode: Rate mode (See @enum rate_modulation). * @mpdu_density: MDPU density. * @retry_limit: Max number of retries. - * @aifs: AIFS value. * @ifs: IFS value. * @txop: IFS value for 11n capable chips. - * @cw_min: cwmin value. - * @cw_max: cwmax value. * @cipher: Cipher type used for encryption. * @key_idx: Key index used for encryption. * @iv_offset: Position where IV should be inserted by hardware. @@ -322,28 +301,31 @@ enum txentry_desc_flags { struct txentry_desc { unsigned long flags; - enum data_queue_qid qid; - u16 length; u16 header_length; - u16 length_high; - u16 length_low; - u16 signal; - u16 service; - - u16 mcs; - u16 stbc; - u16 ba_size; - u16 rate_mode; - u16 mpdu_density; + union { + struct { + u16 length_high; + u16 length_low; + u16 signal; + u16 service; + enum ifs ifs; + } plcp; + + struct { + u16 mcs; + u8 stbc; + u8 ba_size; + u8 mpdu_density; + enum txop txop; + int wcid; + } ht; + } u; + + enum rate_modulation rate_mode; short retry_limit; - short aifs; - short ifs; - short txop; - short cw_min; - short cw_max; enum cipher cipher; u16 key_idx; @@ -362,30 +344,38 @@ struct txentry_desc { * only be touched after the device has signaled it is done with it. * @ENTRY_DATA_PENDING: This entry contains a valid frame and is waiting * for the signal to start sending. - * @ENTRY_DATA_IO_FAILED: Hardware indicated that an IO error occured - * while transfering the data to the hardware. No TX status report will + * @ENTRY_DATA_IO_FAILED: Hardware indicated that an IO error occurred + * while transferring the data to the hardware. No TX status report will * be expected from the hardware. + * @ENTRY_DATA_STATUS_PENDING: The entry has been send to the device and + * returned. It is now waiting for the status reporting before the + * entry can be reused again. */ enum queue_entry_flags { ENTRY_BCN_ASSIGNED, ENTRY_OWNER_DEVICE_DATA, ENTRY_DATA_PENDING, - ENTRY_DATA_IO_FAILED + ENTRY_DATA_IO_FAILED, + ENTRY_DATA_STATUS_PENDING, + ENTRY_DATA_STATUS_SET, }; /** * struct queue_entry: Entry inside the &struct data_queue * * @flags: Entry flags, see &enum queue_entry_flags. + * @last_action: Timestamp of last change. * @queue: The data queue (&struct data_queue) to which this entry belongs. * @skb: The buffer which is currently being transmitted (for TX queue), - * or used to directly recieve data in (for RX queue). + * or used to directly receive data in (for RX queue). * @entry_idx: The entry index number. * @priv_data: Private data belonging to this queue entry. The pointer * points to data specific to a particular driver and queue type. + * @status: Device specific status */ struct queue_entry { unsigned long flags; + unsigned long last_action; struct data_queue *queue; @@ -393,6 +383,8 @@ struct queue_entry { unsigned int entry_idx; + u32 status; + void *priv_data; }; @@ -402,7 +394,7 @@ struct queue_entry { * @Q_INDEX: Index pointer to the current entry in the queue, if this entry is * owned by the hardware then the queue is considered to be full. * @Q_INDEX_DMA_DONE: Index pointer for the next entry which will have been - * transfered to the hardware. + * transferred to the hardware. * @Q_INDEX_DONE: Index pointer to the next entry which will be completed by * the hardware and for which we need to run the txdone handler. If this * entry is not owned by the hardware the queue is considered to be empty. @@ -417,13 +409,34 @@ enum queue_index { }; /** + * enum data_queue_flags: Status flags for data queues + * + * @QUEUE_STARTED: The queue has been started. Fox RX queues this means the + * device might be DMA'ing skbuffers. TX queues will accept skbuffers to + * be transmitted and beacon queues will start beaconing the configured + * beacons. + * @QUEUE_PAUSED: The queue has been started but is currently paused. + * When this bit is set, the queue has been stopped in mac80211, + * preventing new frames to be enqueued. However, a few frames + * might still appear shortly after the pausing... + */ +enum data_queue_flags { + QUEUE_STARTED, + QUEUE_PAUSED, +}; + +/** * struct data_queue: Data queue * * @rt2x00dev: Pointer to main &struct rt2x00dev where this queue belongs to. * @entries: Base address of the &struct queue_entry which are * part of this queue. * @qid: The queue identification, see &enum data_queue_qid. - * @lock: Spinlock to protect index handling. Whenever @index, @index_done or + * @flags: Entry flags, see &enum queue_entry_flags. + * @status_lock: The mutex for protecting the start/stop/flush + * handling on this queue. + * @tx_lock: Spinlock to serialize tx operations on this queue. + * @index_lock: Spinlock to protect index handling. Whenever @index, @index_done or * @index_crypt needs to be changed this lock should be grabbed to prevent * index corruption due to concurrency. * @count: Number of frames handled in the queue. @@ -438,6 +451,7 @@ enum queue_index { * @cw_max: The cw max value for outgoing frames (field ignored in RX queue). * @data_size: Maximum data size for the frames in this queue. * @desc_size: Hardware descriptor size for the data in this queue. + * @priv_size: Size of per-queue_entry private data. * @usb_endpoint: Device endpoint used for communication (USB only) * @usb_maxpacket: Max packet size for given endpoint (USB only) */ @@ -446,14 +460,17 @@ struct data_queue { struct queue_entry *entries; enum data_queue_qid qid; + unsigned long flags; + + struct mutex status_lock; + spinlock_t tx_lock; + spinlock_t index_lock; - spinlock_t lock; unsigned int count; unsigned short limit; unsigned short threshold; unsigned short length; unsigned short index[Q_INDEX_MAX]; - unsigned long last_action[Q_INDEX_MAX]; unsigned short txop; unsigned short aifs; @@ -461,31 +478,15 @@ struct data_queue { unsigned short cw_max; unsigned short data_size; - unsigned short desc_size; + unsigned char desc_size; + unsigned char winfo_size; + unsigned short priv_size; unsigned short usb_endpoint; unsigned short usb_maxpacket; }; /** - * struct data_queue_desc: Data queue description - * - * The information in this structure is used by drivers - * to inform rt2x00lib about the creation of the data queue. - * - * @entry_num: Maximum number of entries for a queue. - * @data_size: Maximum data size for the frames in this queue. - * @desc_size: Hardware descriptor size for the data in this queue. - * @priv_size: Size of per-queue_entry private data. - */ -struct data_queue_desc { - unsigned short entry_num; - unsigned short data_size; - unsigned short desc_size; - unsigned short priv_size; -}; - -/** * queue_end - Return pointer to the last queue (HELPER MACRO). * @__dev: Pointer to &struct rt2x00_dev * @@ -570,16 +571,22 @@ struct data_queue_desc { * @queue: Pointer to @data_queue * @start: &enum queue_index Pointer to start index * @end: &enum queue_index Pointer to end index + * @data: Data to pass to the callback function * @fn: The function to call for each &struct queue_entry * * This will walk through all entries in the queue, in chronological * order. This means it will start at the current @start pointer * and will walk through the queue until it reaches the @end pointer. + * + * If fn returns true for an entry rt2x00queue_for_each_entry will stop + * processing and return true as well. */ -void rt2x00queue_for_each_entry(struct data_queue *queue, +bool rt2x00queue_for_each_entry(struct data_queue *queue, enum queue_index start, enum queue_index end, - void (*fn)(struct queue_entry *entry)); + void *data, + bool (*fn)(struct queue_entry *entry, + void *data)); /** * rt2x00queue_empty - Check if the queue is empty. @@ -616,25 +623,15 @@ static inline int rt2x00queue_threshold(struct data_queue *queue) { return rt2x00queue_available(queue) < queue->threshold; } - -/** - * rt2x00queue_timeout - Check if a timeout occured for STATUS reorts - * @queue: Queue to check. - */ -static inline int rt2x00queue_timeout(struct data_queue *queue) -{ - return time_after(queue->last_action[Q_INDEX_DMA_DONE], - queue->last_action[Q_INDEX_DONE] + (HZ / 10)); -} - /** - * rt2x00queue_timeout - Check if a timeout occured for DMA transfers - * @queue: Queue to check. + * rt2x00queue_dma_timeout - Check if a timeout occurred for DMA transfers + * @entry: Queue entry to check. */ -static inline int rt2x00queue_dma_timeout(struct data_queue *queue) +static inline int rt2x00queue_dma_timeout(struct queue_entry *entry) { - return time_after(queue->last_action[Q_INDEX], - queue->last_action[Q_INDEX_DMA_DONE] + (HZ / 10)); + if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) + return false; + return time_after(jiffies, entry->last_action + msecs_to_jiffies(100)); } /** |