diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/rx.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 59 |
1 files changed, 49 insertions, 10 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index 20f93386fc4d..498a14ebac47 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -298,6 +298,7 @@ static void iwl_pcie_restock_bd(struct iwl_trans *trans, static void iwl_pcie_rxmq_restock(struct iwl_trans *trans, struct iwl_rxq *rxq) { + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_rx_mem_buffer *rxb; /* @@ -318,8 +319,8 @@ static void iwl_pcie_rxmq_restock(struct iwl_trans *trans, list); list_del(&rxb->list); rxb->invalid = false; - /* 12 first bits are expected to be empty */ - WARN_ON(rxb->page_dma & DMA_BIT_MASK(12)); + /* some low bits are expected to be unset (depending on hw) */ + WARN_ON(rxb->page_dma & trans_pcie->supported_dma_mask); /* Point to Rx buffer via next RBD in circular buffer */ iwl_pcie_restock_bd(trans, rxq, rxb); rxq->write = (rxq->write + 1) & (rxq->queue_size - 1); @@ -412,15 +413,34 @@ void iwl_pcie_rxq_restock(struct iwl_trans *trans, struct iwl_rxq *rxq) * */ static struct page *iwl_pcie_rx_alloc_page(struct iwl_trans *trans, - gfp_t priority) + u32 *offset, gfp_t priority) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + unsigned int rbsize = iwl_trans_get_rb_size(trans_pcie->rx_buf_size); + unsigned int allocsize = PAGE_SIZE << trans_pcie->rx_page_order; struct page *page; gfp_t gfp_mask = priority; if (trans_pcie->rx_page_order > 0) gfp_mask |= __GFP_COMP; + if (trans_pcie->alloc_page) { + spin_lock_bh(&trans_pcie->alloc_page_lock); + /* recheck */ + if (trans_pcie->alloc_page) { + *offset = trans_pcie->alloc_page_used; + page = trans_pcie->alloc_page; + trans_pcie->alloc_page_used += rbsize; + if (trans_pcie->alloc_page_used >= allocsize) + trans_pcie->alloc_page = NULL; + else + get_page(page); + spin_unlock_bh(&trans_pcie->alloc_page_lock); + return page; + } + spin_unlock_bh(&trans_pcie->alloc_page_lock); + } + /* Alloc a new receive buffer */ page = alloc_pages(gfp_mask, trans_pcie->rx_page_order); if (!page) { @@ -436,6 +456,18 @@ static struct page *iwl_pcie_rx_alloc_page(struct iwl_trans *trans, "Failed to alloc_pages\n"); return NULL; } + + if (2 * rbsize <= allocsize) { + spin_lock_bh(&trans_pcie->alloc_page_lock); + if (!trans_pcie->alloc_page) { + get_page(page); + trans_pcie->alloc_page = page; + trans_pcie->alloc_page_used = rbsize; + } + spin_unlock_bh(&trans_pcie->alloc_page_lock); + } + + *offset = 0; return page; } @@ -456,6 +488,8 @@ void iwl_pcie_rxq_alloc_rbs(struct iwl_trans *trans, gfp_t priority, struct page *page; while (1) { + unsigned int offset; + spin_lock(&rxq->lock); if (list_empty(&rxq->rx_used)) { spin_unlock(&rxq->lock); @@ -463,8 +497,7 @@ void iwl_pcie_rxq_alloc_rbs(struct iwl_trans *trans, gfp_t priority, } spin_unlock(&rxq->lock); - /* Alloc a new receive buffer */ - page = iwl_pcie_rx_alloc_page(trans, priority); + page = iwl_pcie_rx_alloc_page(trans, &offset, priority); if (!page) return; @@ -482,9 +515,10 @@ void iwl_pcie_rxq_alloc_rbs(struct iwl_trans *trans, gfp_t priority, BUG_ON(rxb->page); rxb->page = page; + rxb->offset = offset; /* Get physical address of the RB */ rxb->page_dma = - dma_map_page(trans->dev, page, 0, + dma_map_page(trans->dev, page, rxb->offset, trans_pcie->rx_buf_bytes, DMA_FROM_DEVICE); if (dma_mapping_error(trans->dev, rxb->page_dma)) { @@ -567,13 +601,15 @@ static void iwl_pcie_rx_allocator(struct iwl_trans *trans) BUG_ON(rxb->page); /* Alloc a new receive buffer */ - page = iwl_pcie_rx_alloc_page(trans, gfp_mask); + page = iwl_pcie_rx_alloc_page(trans, &rxb->offset, + gfp_mask); if (!page) continue; rxb->page = page; /* Get physical address of the RB */ - rxb->page_dma = dma_map_page(trans->dev, page, 0, + rxb->page_dma = dma_map_page(trans->dev, page, + rxb->offset, trans_pcie->rx_buf_bytes, DMA_FROM_DEVICE); if (dma_mapping_error(trans->dev, rxb->page_dma)) { @@ -1190,6 +1226,9 @@ void iwl_pcie_rx_free(struct iwl_trans *trans) kfree(trans_pcie->rx_pool); kfree(trans_pcie->global_table); kfree(trans_pcie->rxq); + + if (trans_pcie->alloc_page) + __free_pages(trans_pcie->alloc_page, trans_pcie->rx_page_order); } static void iwl_pcie_rx_move_to_allocator(struct iwl_rxq *rxq, @@ -1261,7 +1300,7 @@ static void iwl_pcie_rx_handle_rb(struct iwl_trans *trans, bool reclaim; int index, cmd_index, len; struct iwl_rx_cmd_buffer rxcb = { - ._offset = offset, + ._offset = rxb->offset + offset, ._rx_page_order = trans_pcie->rx_page_order, ._page = rxb->page, ._page_stolen = false, @@ -1367,7 +1406,7 @@ static void iwl_pcie_rx_handle_rb(struct iwl_trans *trans, * rx_free list for reuse later. */ if (rxb->page != NULL) { rxb->page_dma = - dma_map_page(trans->dev, rxb->page, 0, + dma_map_page(trans->dev, rxb->page, rxb->offset, trans_pcie->rx_buf_bytes, DMA_FROM_DEVICE); if (dma_mapping_error(trans->dev, rxb->page_dma)) { |