if (priv->hw->mode->set_16kib_bfsize)
bfsize = priv->hw->mode->set_16kib_bfsize(dev->mtu);
-@@ -1033,235 +1234,409 @@ static int init_dma_desc_rings(struct ne
+@@ -1033,257 +1234,516 @@ static int init_dma_desc_rings(struct ne
priv->dma_buf_sz = bfsize;
- priv->tx_skbuff_dma[i].buf,
- priv->tx_skbuff_dma[i].len,
- DMA_TO_DEVICE);
-- }
+ for (i = 0; i < DMA_TX_SIZE; i++)
+ stmmac_free_tx_buffer(priv, queue, i);
+}
-
-- if (priv->tx_skbuff[i]) {
-- dev_kfree_skb_any(priv->tx_skbuff[i]);
-- priv->tx_skbuff[i] = NULL;
-- priv->tx_skbuff_dma[i].buf = 0;
-- priv->tx_skbuff_dma[i].map_as_page = false;
-- }
++
+/**
+ * free_dma_rx_desc_resources - free RX dma desc resources
+ * @priv: private structure
+
+ kfree(rx_q->rx_skbuff_dma);
+ kfree(rx_q->rx_skbuff);
- }
- }
-
- /**
-- * alloc_dma_desc_resources - alloc TX/RX resources.
++ }
++}
++
++/**
+ * free_dma_tx_desc_resources - free TX dma desc resources
+ * @priv: private structure
+ */
+
+/**
+ * alloc_dma_rx_desc_resources - alloc RX resources.
- * @priv: private structure
- * Description: according to which descriptor can be used (extend or basic)
- * this function allocates the resources for TX and RX paths. In case of
- * reception, for example, it pre-allocated the RX socket buffer in order to
- * allow zero-copy mechanism.
- */
--static int alloc_dma_desc_resources(struct stmmac_priv *priv)
++ * @priv: private structure
++ * Description: according to which descriptor can be used (extend or basic)
++ * this function allocates the resources for TX and RX paths. In case of
++ * reception, for example, it pre-allocated the RX socket buffer in order to
++ * allow zero-copy mechanism.
++ */
+static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv)
- {
++{
+ u32 rx_count = priv->plat->rx_queues_to_use;
- int ret = -ENOMEM;
++ int ret = -ENOMEM;
+ u32 queue;
-
-- priv->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE, sizeof(dma_addr_t),
-- GFP_KERNEL);
-- if (!priv->rx_skbuff_dma)
-- return -ENOMEM;
++
+ /* RX queues buffers and DMA */
+ for (queue = 0; queue < rx_count; queue++) {
+ struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
-
-- priv->rx_skbuff = kmalloc_array(DMA_RX_SIZE, sizeof(struct sk_buff *),
-- GFP_KERNEL);
-- if (!priv->rx_skbuff)
-- goto err_rx_skbuff;
--
-- priv->tx_skbuff_dma = kmalloc_array(DMA_TX_SIZE,
-- sizeof(*priv->tx_skbuff_dma),
-- GFP_KERNEL);
-- if (!priv->tx_skbuff_dma)
-- goto err_tx_skbuff_dma;
--
-- priv->tx_skbuff = kmalloc_array(DMA_TX_SIZE, sizeof(struct sk_buff *),
-- GFP_KERNEL);
-- if (!priv->tx_skbuff)
-- goto err_tx_skbuff;
--
-- if (priv->extend_desc) {
-- priv->dma_erx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE *
-- sizeof(struct
-- dma_extended_desc),
-- &priv->dma_rx_phy,
-- GFP_KERNEL);
-- if (!priv->dma_erx)
-- goto err_dma;
++
+ rx_q->queue_index = queue;
+ rx_q->priv_data = priv;
-
-- priv->dma_etx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE *
-- sizeof(struct
-- dma_extended_desc),
-- &priv->dma_tx_phy,
++
+ rx_q->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE,
+ sizeof(dma_addr_t),
- GFP_KERNEL);
-- if (!priv->dma_etx) {
-- dma_free_coherent(priv->device, DMA_RX_SIZE *
-- sizeof(struct dma_extended_desc),
-- priv->dma_erx, priv->dma_rx_phy);
-- goto err_dma;
-- }
-- } else {
-- priv->dma_rx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE *
-- sizeof(struct dma_desc),
-- &priv->dma_rx_phy,
-- GFP_KERNEL);
-- if (!priv->dma_rx)
-- goto err_dma;
++ GFP_KERNEL);
+ if (!rx_q->rx_skbuff_dma)
+ return -ENOMEM;
-
-- priv->dma_tx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE *
-- sizeof(struct dma_desc),
-- &priv->dma_tx_phy,
-- GFP_KERNEL);
-- if (!priv->dma_tx) {
-- dma_free_coherent(priv->device, DMA_RX_SIZE *
-- sizeof(struct dma_desc),
-- priv->dma_rx, priv->dma_rx_phy);
++
+ rx_q->rx_skbuff = kmalloc_array(DMA_RX_SIZE,
+ sizeof(struct sk_buff *),
+ GFP_KERNEL);
+ if (!rx_q->rx_skbuff)
- goto err_dma;
++ goto err_dma;
+
+ if (priv->extend_desc) {
+ rx_q->dma_erx = dma_zalloc_coherent(priv->device,
+ GFP_KERNEL);
+ if (!rx_q->dma_rx)
+ goto err_dma;
- }
- }
-
- return 0;
-
- err_dma:
-- kfree(priv->tx_skbuff);
--err_tx_skbuff:
-- kfree(priv->tx_skbuff_dma);
--err_tx_skbuff_dma:
-- kfree(priv->rx_skbuff);
--err_rx_skbuff:
-- kfree(priv->rx_skbuff_dma);
++ }
++ }
++
++ return 0;
++
++err_dma:
+ free_dma_rx_desc_resources(priv);
+
+ return ret;
+ GFP_KERNEL);
+ if (!tx_q->dma_tx)
+ goto err_dma_buffers;
-+ }
+ }
+ }
+
+ return 0;
+
+ ret = alloc_dma_tx_desc_resources(priv);
+
- return ret;
- }
-
++ return ret;
++}
++
+/**
+ * free_dma_desc_resources - free dma desc resources
+ * @priv: private structure
+ */
- static void free_dma_desc_resources(struct stmmac_priv *priv)
- {
-- /* Release the DMA TX/RX socket buffers */
-- dma_free_rx_skbufs(priv);
-- dma_free_tx_skbufs(priv);
--
-- /* Free DMA regions of consistent memory previously allocated */
-- if (!priv->extend_desc) {
-- dma_free_coherent(priv->device,
-- DMA_TX_SIZE * sizeof(struct dma_desc),
-- priv->dma_tx, priv->dma_tx_phy);
-- dma_free_coherent(priv->device,
-- DMA_RX_SIZE * sizeof(struct dma_desc),
-- priv->dma_rx, priv->dma_rx_phy);
-- } else {
-- dma_free_coherent(priv->device, DMA_TX_SIZE *
-- sizeof(struct dma_extended_desc),
-- priv->dma_etx, priv->dma_tx_phy);
-- dma_free_coherent(priv->device, DMA_RX_SIZE *
-- sizeof(struct dma_extended_desc),
-- priv->dma_erx, priv->dma_rx_phy);
-- }
-- kfree(priv->rx_skbuff_dma);
-- kfree(priv->rx_skbuff);
-- kfree(priv->tx_skbuff_dma);
-- kfree(priv->tx_skbuff);
++static void free_dma_desc_resources(struct stmmac_priv *priv)
++{
+ /* Release the DMA RX socket buffers */
+ free_dma_rx_desc_resources(priv);
+
+ /* Release the DMA TX socket buffers */
+ free_dma_tx_desc_resources(priv);
- }
-
- /**
-@@ -1271,19 +1646,104 @@ static void free_dma_desc_resources(stru
- */
- static void stmmac_mac_enable_rx_queues(struct stmmac_priv *priv)
- {
-- int rx_count = priv->dma_cap.number_rx_queues;
-- int queue = 0;
++}
++
++/**
++ * stmmac_mac_enable_rx_queues - Enable MAC rx queues
++ * @priv: driver private structure
++ * Description: It is used for enabling the rx queues in the MAC
++ */
++static void stmmac_mac_enable_rx_queues(struct stmmac_priv *priv)
++{
+ u32 rx_queues_count = priv->plat->rx_queues_to_use;
+ int queue;
+ u8 mode;
-- /* If GMAC does not have multiple queues, then this is not necessary*/
-- if (rx_count == 1)
-- return;
+- if (priv->tx_skbuff[i]) {
+- dev_kfree_skb_any(priv->tx_skbuff[i]);
+- priv->tx_skbuff[i] = NULL;
+- priv->tx_skbuff_dma[i].buf = 0;
+- priv->tx_skbuff_dma[i].map_as_page = false;
+- }
+ for (queue = 0; queue < rx_queues_count; queue++) {
+ mode = priv->plat->rx_queues_cfg[queue].mode_to_use;
+ priv->hw->mac->rx_queue_enable(priv->hw, mode, queue);
-+ }
-+}
+ }
+ }
-- /**
-- * If the core is synthesized with multiple rx queues / multiple
-- * dma channels, then rx queues will be disabled by default.
-- * For now only rx queue 0 is enabled.
-- */
-- priv->hw->mac->rx_queue_enable(priv->hw, queue);
-+/**
+ /**
+- * alloc_dma_desc_resources - alloc TX/RX resources.
+- * @priv: private structure
+- * Description: according to which descriptor can be used (extend or basic)
+- * this function allocates the resources for TX and RX paths. In case of
+- * reception, for example, it pre-allocated the RX socket buffer in order to
+- * allow zero-copy mechanism.
+ * stmmac_start_rx_dma - start RX DMA channel
+ * @priv: driver private structure
+ * @chan: RX channel index
+ * Description:
+ * This starts a RX DMA channel
-+ */
+ */
+-static int alloc_dma_desc_resources(struct stmmac_priv *priv)
+static void stmmac_start_rx_dma(struct stmmac_priv *priv, u32 chan)
-+{
+ {
+- int ret = -ENOMEM;
+-
+- priv->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE, sizeof(dma_addr_t),
+- GFP_KERNEL);
+- if (!priv->rx_skbuff_dma)
+- return -ENOMEM;
+-
+- priv->rx_skbuff = kmalloc_array(DMA_RX_SIZE, sizeof(struct sk_buff *),
+- GFP_KERNEL);
+- if (!priv->rx_skbuff)
+- goto err_rx_skbuff;
+-
+- priv->tx_skbuff_dma = kmalloc_array(DMA_TX_SIZE,
+- sizeof(*priv->tx_skbuff_dma),
+- GFP_KERNEL);
+- if (!priv->tx_skbuff_dma)
+- goto err_tx_skbuff_dma;
+-
+- priv->tx_skbuff = kmalloc_array(DMA_TX_SIZE, sizeof(struct sk_buff *),
+- GFP_KERNEL);
+- if (!priv->tx_skbuff)
+- goto err_tx_skbuff;
+-
+- if (priv->extend_desc) {
+- priv->dma_erx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE *
+- sizeof(struct
+- dma_extended_desc),
+- &priv->dma_rx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_erx)
+- goto err_dma;
+-
+- priv->dma_etx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE *
+- sizeof(struct
+- dma_extended_desc),
+- &priv->dma_tx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_etx) {
+- dma_free_coherent(priv->device, DMA_RX_SIZE *
+- sizeof(struct dma_extended_desc),
+- priv->dma_erx, priv->dma_rx_phy);
+- goto err_dma;
+- }
+- } else {
+- priv->dma_rx = dma_zalloc_coherent(priv->device, DMA_RX_SIZE *
+- sizeof(struct dma_desc),
+- &priv->dma_rx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_rx)
+- goto err_dma;
+ netdev_dbg(priv->dev, "DMA RX processes started in channel %d\n", chan);
+ priv->hw->dma->start_rx(priv->ioaddr, chan);
+}
-+
+
+- priv->dma_tx = dma_zalloc_coherent(priv->device, DMA_TX_SIZE *
+- sizeof(struct dma_desc),
+- &priv->dma_tx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_tx) {
+- dma_free_coherent(priv->device, DMA_RX_SIZE *
+- sizeof(struct dma_desc),
+- priv->dma_rx, priv->dma_rx_phy);
+- goto err_dma;
+- }
+- }
+/**
+ * stmmac_start_tx_dma - start TX DMA channel
+ * @priv: driver private structure
+ netdev_dbg(priv->dev, "DMA TX processes started in channel %d\n", chan);
+ priv->hw->dma->start_tx(priv->ioaddr, chan);
+}
-+
+
+- return 0;
+/**
+ * stmmac_stop_rx_dma - stop RX DMA channel
+ * @priv: driver private structure
+ netdev_dbg(priv->dev, "DMA RX processes stopped in channel %d\n", chan);
+ priv->hw->dma->stop_rx(priv->ioaddr, chan);
+}
-+
+
+-err_dma:
+- kfree(priv->tx_skbuff);
+-err_tx_skbuff:
+- kfree(priv->tx_skbuff_dma);
+-err_tx_skbuff_dma:
+- kfree(priv->rx_skbuff);
+-err_rx_skbuff:
+- kfree(priv->rx_skbuff_dma);
+- return ret;
+/**
+ * stmmac_stop_tx_dma - stop TX DMA channel
+ * @priv: driver private structure
+{
+ netdev_dbg(priv->dev, "DMA TX processes stopped in channel %d\n", chan);
+ priv->hw->dma->stop_tx(priv->ioaddr, chan);
-+}
-+
+ }
+
+-static void free_dma_desc_resources(struct stmmac_priv *priv)
+/**
+ * stmmac_start_all_dma - start all RX and TX DMA channels
+ * @priv: driver private structure
+ * This starts all the RX and TX DMA channels
+ */
+static void stmmac_start_all_dma(struct stmmac_priv *priv)
-+{
+ {
+- /* Release the DMA TX/RX socket buffers */
+- dma_free_rx_skbufs(priv);
+- dma_free_tx_skbufs(priv);
+-
+- /* Free DMA regions of consistent memory previously allocated */
+- if (!priv->extend_desc) {
+- dma_free_coherent(priv->device,
+- DMA_TX_SIZE * sizeof(struct dma_desc),
+- priv->dma_tx, priv->dma_tx_phy);
+- dma_free_coherent(priv->device,
+- DMA_RX_SIZE * sizeof(struct dma_desc),
+- priv->dma_rx, priv->dma_rx_phy);
+- } else {
+- dma_free_coherent(priv->device, DMA_TX_SIZE *
+- sizeof(struct dma_extended_desc),
+- priv->dma_etx, priv->dma_tx_phy);
+- dma_free_coherent(priv->device, DMA_RX_SIZE *
+- sizeof(struct dma_extended_desc),
+- priv->dma_erx, priv->dma_rx_phy);
+- }
+- kfree(priv->rx_skbuff_dma);
+- kfree(priv->rx_skbuff);
+- kfree(priv->tx_skbuff_dma);
+- kfree(priv->tx_skbuff);
+ u32 rx_channels_count = priv->plat->rx_queues_to_use;
+ u32 tx_channels_count = priv->plat->tx_queues_to_use;
+ u32 chan = 0;
+
+ for (chan = 0; chan < tx_channels_count; chan++)
+ stmmac_start_tx_dma(priv, chan);
-+}
-+
-+/**
+ }
+
+ /**
+- * stmmac_mac_enable_rx_queues - Enable MAC rx queues
+- * @priv: driver private structure
+- * Description: It is used for enabling the rx queues in the MAC
+ * stmmac_stop_all_dma - stop all RX and TX DMA channels
+ * @priv: driver private structure
+ * Description:
+ * This stops the RX and TX DMA channels
-+ */
+ */
+-static void stmmac_mac_enable_rx_queues(struct stmmac_priv *priv)
+static void stmmac_stop_all_dma(struct stmmac_priv *priv)
-+{
+ {
+- int rx_count = priv->dma_cap.number_rx_queues;
+- int queue = 0;
+ u32 rx_channels_count = priv->plat->rx_queues_to_use;
+ u32 tx_channels_count = priv->plat->tx_queues_to_use;
+ u32 chan = 0;
-+
+
+- /* If GMAC does not have multiple queues, then this is not necessary*/
+- if (rx_count == 1)
+- return;
+ for (chan = 0; chan < rx_channels_count; chan++)
+ stmmac_stop_rx_dma(priv, chan);
-+
+
+- /**
+- * If the core is synthesized with multiple rx queues / multiple
+- * dma channels, then rx queues will be disabled by default.
+- * For now only rx queue 0 is enabled.
+- */
+- priv->hw->mac->rx_queue_enable(priv->hw, queue);
+ for (chan = 0; chan < tx_channels_count; chan++)
+ stmmac_stop_tx_dma(priv, chan);
}
projects / openwrt / staging / xback.git / commitdiff