diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl4965-base.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl4965-base.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c index 74c3d3917fe..66aa938e316 100644 --- a/drivers/net/wireless/iwlwifi/iwl4965-base.c +++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c @@ -305,6 +305,9 @@ static int iwl4965_tx_queue_alloc(struct iwl4965_priv *priv, return -ENOMEM; } +/** + * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue + */ int iwl4965_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id) { @@ -312,9 +315,14 @@ int iwl4965_tx_queue_init(struct iwl4965_priv *priv, int len; int rc = 0; - /* allocate command space + one big command for scan since scan - * command is very huge the system will not have two scan at the - * same time */ + /* + * Alloc buffer array for commands (Tx or other types of commands). + * For the command queue (#4), allocate command space + one big + * command for scan, since scan command is very huge; the system will + * not have two scans at the same time, so only one is needed. + * For normal Tx queues (all other queues), no super-size command + * space is needed. + */ len = sizeof(struct iwl4965_cmd) * slots_num; if (txq_id == IWL_CMD_QUEUE_NUM) len += IWL_MAX_SCAN_SIZE; @@ -322,6 +330,7 @@ int iwl4965_tx_queue_init(struct iwl4965_priv *priv, if (!txq->cmd) return -ENOMEM; + /* Alloc driver data array and TFD circular buffer */ rc = iwl4965_tx_queue_alloc(priv, txq, txq_id); if (rc) { pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd); @@ -333,8 +342,11 @@ int iwl4965_tx_queue_init(struct iwl4965_priv *priv, /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise * iwl4965_queue_inc_wrap and iwl4965_queue_dec_wrap are broken. */ BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); + + /* Initialize queue's high/low-water marks, and head/tail indexes */ iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id); + /* Tell device where to find queue */ iwl4965_hw_tx_queue_init(priv, txq); return 0; |