u32 domains_bitmap;
};
+struct iwl_dma_ptr {
+ dma_addr_t dma;
+ void *addr;
+ size_t size;
+};
+
+struct iwl_cmd_meta {
+ /* only for SYNC commands, iff the reply skb is wanted */
+ struct iwl_host_cmd *source;
+ u32 flags;
+ u32 tbs;
+};
+
+/*
+ * The FH will write back to the first TB only, so we need to copy some data
+ * into the buffer regardless of whether it should be mapped or not.
+ * This indicates how big the first TB must be to include the scratch buffer
+ * and the assigned PN.
+ * Since PN location is 8 bytes at offset 12, it's 20 now.
+ * If we make it bigger then allocations will be bigger and copy slower, so
+ * that's probably not useful.
+ */
+#define IWL_FIRST_TB_SIZE 20
+#define IWL_FIRST_TB_SIZE_ALIGN ALIGN(IWL_FIRST_TB_SIZE, 64)
+
+struct iwl_pcie_txq_entry {
+ void *cmd;
+ struct sk_buff *skb;
+ /* buffer to free after command completes */
+ const void *free_buf;
+ struct iwl_cmd_meta meta;
+};
+
+struct iwl_pcie_first_tb_buf {
+ u8 buf[IWL_FIRST_TB_SIZE_ALIGN];
+};
+
+/**
+ * struct iwl_txq - Tx Queue for DMA
+ * @q: generic Rx/Tx queue descriptor
+ * @tfds: transmit frame descriptors (DMA memory)
+ * @first_tb_bufs: start of command headers, including scratch buffers, for
+ * the writeback -- this is DMA memory and an array holding one buffer
+ * for each command on the queue
+ * @first_tb_dma: DMA address for the first_tb_bufs start
+ * @entries: transmit entries (driver state)
+ * @lock: queue lock
+ * @stuck_timer: timer that fires if queue gets stuck
+ * @trans: pointer back to transport (for timer)
+ * @need_update: indicates need to update read/write index
+ * @ampdu: true if this queue is an ampdu queue for an specific RA/TID
+ * @wd_timeout: queue watchdog timeout (jiffies) - per queue
+ * @frozen: tx stuck queue timer is frozen
+ * @frozen_expiry_remainder: remember how long until the timer fires
+ * @bc_tbl: byte count table of the queue (relevant only for gen2 transport)
+ * @write_ptr: 1-st empty entry (index) host_w
+ * @read_ptr: last used entry (index) host_r
+ * @dma_addr: physical addr for BD's
+ * @n_window: safe queue window
+ * @id: queue id
+ * @low_mark: low watermark, resume queue if free space more than this
+ * @high_mark: high watermark, stop queue if free space less than this
+ *
+ * A Tx queue consists of circular buffer of BDs (a.k.a. TFDs, transmit frame
+ * descriptors) and required locking structures.
+ *
+ * Note the difference between TFD_QUEUE_SIZE_MAX and n_window: the hardware
+ * always assumes 256 descriptors, so TFD_QUEUE_SIZE_MAX is always 256 (unless
+ * there might be HW changes in the future). For the normal TX
+ * queues, n_window, which is the size of the software queue data
+ * is also 256; however, for the command queue, n_window is only
+ * 32 since we don't need so many commands pending. Since the HW
+ * still uses 256 BDs for DMA though, TFD_QUEUE_SIZE_MAX stays 256.
+ * This means that we end up with the following:
+ * HW entries: | 0 | ... | N * 32 | ... | N * 32 + 31 | ... | 255 |
+ * SW entries: | 0 | ... | 31 |
+ * where N is a number between 0 and 7. This means that the SW
+ * data is a window overlayed over the HW queue.
+ */
+struct iwl_txq {
+ void *tfds;
+ struct iwl_pcie_first_tb_buf *first_tb_bufs;
+ dma_addr_t first_tb_dma;
+ struct iwl_pcie_txq_entry *entries;
+ /* lock for syncing changes on the queue */
+ spinlock_t lock;
+ unsigned long frozen_expiry_remainder;
+ struct timer_list stuck_timer;
+ struct iwl_trans *trans;
+ bool need_update;
+ bool frozen;
+ bool ampdu;
+ int block;
+ unsigned long wd_timeout;
+ struct sk_buff_head overflow_q;
+ struct iwl_dma_ptr bc_tbl;
+
+ int write_ptr;
+ int read_ptr;
+ dma_addr_t dma_addr;
+ int n_window;
+ u32 id;
+ int low_mark;
+ int high_mark;
+
+ bool overflow_tx;
+};
/**
* struct iwl_trans - transport common data
*
struct work_struct rx_alloc;
};
-struct iwl_dma_ptr {
- dma_addr_t dma;
- void *addr;
- size_t size;
-};
-
/**
* iwl_queue_inc_wrap - increment queue index, wrap back to beginning
* @index -- current index
(trans->trans_cfg->base_params->max_tfd_queue_size - 1);
}
-struct iwl_cmd_meta {
- /* only for SYNC commands, iff the reply skb is wanted */
- struct iwl_host_cmd *source;
- u32 flags;
- u32 tbs;
-};
-
-/*
- * The FH will write back to the first TB only, so we need to copy some data
- * into the buffer regardless of whether it should be mapped or not.
- * This indicates how big the first TB must be to include the scratch buffer
- * and the assigned PN.
- * Since PN location is 8 bytes at offset 12, it's 20 now.
- * If we make it bigger then allocations will be bigger and copy slower, so
- * that's probably not useful.
- */
-#define IWL_FIRST_TB_SIZE 20
-#define IWL_FIRST_TB_SIZE_ALIGN ALIGN(IWL_FIRST_TB_SIZE, 64)
-
-struct iwl_pcie_txq_entry {
- void *cmd;
- struct sk_buff *skb;
- /* buffer to free after command completes */
- const void *free_buf;
- struct iwl_cmd_meta meta;
-};
-
-struct iwl_pcie_first_tb_buf {
- u8 buf[IWL_FIRST_TB_SIZE_ALIGN];
-};
-
-/**
- * struct iwl_txq - Tx Queue for DMA
- * @q: generic Rx/Tx queue descriptor
- * @tfds: transmit frame descriptors (DMA memory)
- * @first_tb_bufs: start of command headers, including scratch buffers, for
- * the writeback -- this is DMA memory and an array holding one buffer
- * for each command on the queue
- * @first_tb_dma: DMA address for the first_tb_bufs start
- * @entries: transmit entries (driver state)
- * @lock: queue lock
- * @stuck_timer: timer that fires if queue gets stuck
- * @trans: pointer back to transport (for timer)
- * @need_update: indicates need to update read/write index
- * @ampdu: true if this queue is an ampdu queue for an specific RA/TID
- * @wd_timeout: queue watchdog timeout (jiffies) - per queue
- * @frozen: tx stuck queue timer is frozen
- * @frozen_expiry_remainder: remember how long until the timer fires
- * @bc_tbl: byte count table of the queue (relevant only for gen2 transport)
- * @write_ptr: 1-st empty entry (index) host_w
- * @read_ptr: last used entry (index) host_r
- * @dma_addr: physical addr for BD's
- * @n_window: safe queue window
- * @id: queue id
- * @low_mark: low watermark, resume queue if free space more than this
- * @high_mark: high watermark, stop queue if free space less than this
- *
- * A Tx queue consists of circular buffer of BDs (a.k.a. TFDs, transmit frame
- * descriptors) and required locking structures.
- *
- * Note the difference between TFD_QUEUE_SIZE_MAX and n_window: the hardware
- * always assumes 256 descriptors, so TFD_QUEUE_SIZE_MAX is always 256 (unless
- * there might be HW changes in the future). For the normal TX
- * queues, n_window, which is the size of the software queue data
- * is also 256; however, for the command queue, n_window is only
- * 32 since we don't need so many commands pending. Since the HW
- * still uses 256 BDs for DMA though, TFD_QUEUE_SIZE_MAX stays 256.
- * This means that we end up with the following:
- * HW entries: | 0 | ... | N * 32 | ... | N * 32 + 31 | ... | 255 |
- * SW entries: | 0 | ... | 31 |
- * where N is a number between 0 and 7. This means that the SW
- * data is a window overlayed over the HW queue.
- */
-struct iwl_txq {
- void *tfds;
- struct iwl_pcie_first_tb_buf *first_tb_bufs;
- dma_addr_t first_tb_dma;
- struct iwl_pcie_txq_entry *entries;
- spinlock_t lock;
- unsigned long frozen_expiry_remainder;
- struct timer_list stuck_timer;
- struct iwl_trans *trans;
- bool need_update;
- bool frozen;
- bool ampdu;
- int block;
- unsigned long wd_timeout;
- struct sk_buff_head overflow_q;
- struct iwl_dma_ptr bc_tbl;
-
- int write_ptr;
- int read_ptr;
- dma_addr_t dma_addr;
- int n_window;
- u32 id;
- int low_mark;
- int high_mark;
-
- bool overflow_tx;
-};
-
static inline dma_addr_t
iwl_pcie_get_first_tb_dma(struct iwl_txq *txq, int idx)
{
projects / kernel.git / commitdiff