From: Mordechay Goodstein Date: Fri, 29 May 2020 06:39:27 +0000 (+0300) Subject: iwlwifi: move iwl_txq and substructures to a common trans header X-Git-Tag: baikal/mips/sdk5.9~13530^2~46^2~1^2~4 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=57d0b5eb614479a9a413550c2d370b8ec633f0aa;p=kernel.git iwlwifi: move iwl_txq and substructures to a common trans header The txq code is not directly related to the PCIe transport, so move the structures it uses to the common iwl-trans.h header. Signed-off-by: Mordechay Goodstein Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20200529092401.d9d0082b8369.I8298f6e83804c1ea99217a79d95d23ef68b184d4@changeid --- diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h index bba527b339b50..57361b27351e9 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h @@ -795,6 +795,113 @@ struct iwl_trans_debug { 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 * diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h index 3950f5784a154..3c6a119aede40 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/intel/iwlwifi/pcie/internal.h @@ -246,12 +246,6 @@ struct iwl_rb_allocator { 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 @@ -290,107 +284,6 @@ static inline int iwl_queue_dec_wrap(struct iwl_trans *trans, int 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) {