#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
-#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <linux/ip.h>
#include <linux/phy.h>
#include <linux/if_vlan.h>
#include <linux/dma-mapping.h>
+#include <linux/slab.h>
#include "stmmac.h"
#define STMMAC_RESOURCE_NAME "stmmaceth"
}
/**
- * stmmac_dma_start_tx
- * @ioaddr: device I/O address
- * Description: this function starts the DMA tx process.
- */
-static void stmmac_dma_start_tx(unsigned long ioaddr)
-{
- u32 value = readl(ioaddr + DMA_CONTROL);
- value |= DMA_CONTROL_ST;
- writel(value, ioaddr + DMA_CONTROL);
- return;
-}
-
-static void stmmac_dma_stop_tx(unsigned long ioaddr)
-{
- u32 value = readl(ioaddr + DMA_CONTROL);
- value &= ~DMA_CONTROL_ST;
- writel(value, ioaddr + DMA_CONTROL);
- return;
-}
-
-/**
- * stmmac_dma_start_rx
- * @ioaddr: device I/O address
- * Description: this function starts the DMA rx process.
- */
-static void stmmac_dma_start_rx(unsigned long ioaddr)
-{
- u32 value = readl(ioaddr + DMA_CONTROL);
- value |= DMA_CONTROL_SR;
- writel(value, ioaddr + DMA_CONTROL);
-
- return;
-}
-
-static void stmmac_dma_stop_rx(unsigned long ioaddr)
-{
- u32 value = readl(ioaddr + DMA_CONTROL);
- value &= ~DMA_CONTROL_SR;
- writel(value, ioaddr + DMA_CONTROL);
-
- return;
-}
-
-/**
* stmmac_dma_operation_mode - HW DMA operation mode
* @priv : pointer to the private device structure.
* Description: it sets the DMA operation mode: tx/rx DMA thresholds
return;
}
-#ifdef STMMAC_DEBUG
-/**
- * show_tx_process_state
- * @status: tx descriptor status field
- * Description: it shows the Transmit Process State for CSR5[22:20]
- */
-static void show_tx_process_state(unsigned int status)
-{
- unsigned int state;
- state = (status & DMA_STATUS_TS_MASK) >> DMA_STATUS_TS_SHIFT;
-
- switch (state) {
- case 0:
- pr_info("- TX (Stopped): Reset or Stop command\n");
- break;
- case 1:
- pr_info("- TX (Running):Fetching the Tx desc\n");
- break;
- case 2:
- pr_info("- TX (Running): Waiting for end of tx\n");
- break;
- case 3:
- pr_info("- TX (Running): Reading the data "
- "and queuing the data into the Tx buf\n");
- break;
- case 6:
- pr_info("- TX (Suspended): Tx Buff Underflow "
- "or an unavailable Transmit descriptor\n");
- break;
- case 7:
- pr_info("- TX (Running): Closing Tx descriptor\n");
- break;
- default:
- break;
- }
- return;
-}
-
-/**
- * show_rx_process_state
- * @status: rx descriptor status field
- * Description: it shows the Receive Process State for CSR5[19:17]
- */
-static void show_rx_process_state(unsigned int status)
-{
- unsigned int state;
- state = (status & DMA_STATUS_RS_MASK) >> DMA_STATUS_RS_SHIFT;
-
- switch (state) {
- case 0:
- pr_info("- RX (Stopped): Reset or Stop command\n");
- break;
- case 1:
- pr_info("- RX (Running): Fetching the Rx desc\n");
- break;
- case 2:
- pr_info("- RX (Running):Checking for end of pkt\n");
- break;
- case 3:
- pr_info("- RX (Running): Waiting for Rx pkt\n");
- break;
- case 4:
- pr_info("- RX (Suspended): Unavailable Rx buf\n");
- break;
- case 5:
- pr_info("- RX (Running): Closing Rx descriptor\n");
- break;
- case 6:
- pr_info("- RX(Running): Flushing the current frame"
- " from the Rx buf\n");
- break;
- case 7:
- pr_info("- RX (Running): Queuing the Rx frame"
- " from the Rx buf into memory\n");
- break;
- default:
- break;
- }
- return;
-}
-#endif
-
/**
* stmmac_tx:
* @priv: private driver structure
priv->tm->timer_start(tmrate);
else
#endif
- writel(DMA_INTR_DEFAULT_MASK, priv->dev->base_addr + DMA_INTR_ENA);
+ priv->hw->dma->enable_dma_irq(priv->dev->base_addr);
}
static inline void stmmac_disable_irq(struct stmmac_priv *priv)
priv->tm->timer_stop();
else
#endif
- writel(0, priv->dev->base_addr + DMA_INTR_ENA);
+ priv->hw->dma->disable_dma_irq(priv->dev->base_addr);
}
static int stmmac_has_work(struct stmmac_priv *priv)
{
netif_stop_queue(priv->dev);
- stmmac_dma_stop_tx(priv->dev->base_addr);
+ priv->hw->dma->stop_tx(priv->dev->base_addr);
dma_free_tx_skbufs(priv);
priv->hw->desc->init_tx_desc(priv->dma_tx, priv->dma_tx_size);
priv->dirty_tx = 0;
priv->cur_tx = 0;
- stmmac_dma_start_tx(priv->dev->base_addr);
+ priv->hw->dma->start_tx(priv->dev->base_addr);
priv->dev->stats.tx_errors++;
netif_wake_queue(priv->dev);
return;
}
-/**
- * stmmac_dma_interrupt - Interrupt handler for the driver
- * @dev: net device structure
- * Description: Interrupt handler for the driver (DMA).
- */
-static void stmmac_dma_interrupt(struct net_device *dev)
-{
- unsigned long ioaddr = dev->base_addr;
- struct stmmac_priv *priv = netdev_priv(dev);
- /* read the status register (CSR5) */
- u32 intr_status = readl(ioaddr + DMA_STATUS);
-
- DBG(intr, INFO, "%s: [CSR5: 0x%08x]\n", __func__, intr_status);
-#ifdef STMMAC_DEBUG
- /* It displays the DMA transmit process state (CSR5 register) */
- if (netif_msg_tx_done(priv))
- show_tx_process_state(intr_status);
- if (netif_msg_rx_status(priv))
- show_rx_process_state(intr_status);
-#endif
- /* ABNORMAL interrupts */
- if (unlikely(intr_status & DMA_STATUS_AIS)) {
- DBG(intr, INFO, "CSR5[15] DMA ABNORMAL IRQ: ");
- if (unlikely(intr_status & DMA_STATUS_UNF)) {
- DBG(intr, INFO, "transmit underflow\n");
- if (unlikely(tc != SF_DMA_MODE) && (tc <= 256)) {
- /* Try to bump up the threshold */
- tc += 64;
- priv->hw->dma->dma_mode(ioaddr, tc,
- SF_DMA_MODE);
- priv->xstats.threshold = tc;
- }
- stmmac_tx_err(priv);
- priv->xstats.tx_undeflow_irq++;
- }
- if (unlikely(intr_status & DMA_STATUS_TJT)) {
- DBG(intr, INFO, "transmit jabber\n");
- priv->xstats.tx_jabber_irq++;
- }
- if (unlikely(intr_status & DMA_STATUS_OVF)) {
- DBG(intr, INFO, "recv overflow\n");
- priv->xstats.rx_overflow_irq++;
- }
- if (unlikely(intr_status & DMA_STATUS_RU)) {
- DBG(intr, INFO, "receive buffer unavailable\n");
- priv->xstats.rx_buf_unav_irq++;
- }
- if (unlikely(intr_status & DMA_STATUS_RPS)) {
- DBG(intr, INFO, "receive process stopped\n");
- priv->xstats.rx_process_stopped_irq++;
- }
- if (unlikely(intr_status & DMA_STATUS_RWT)) {
- DBG(intr, INFO, "receive watchdog\n");
- priv->xstats.rx_watchdog_irq++;
- }
- if (unlikely(intr_status & DMA_STATUS_ETI)) {
- DBG(intr, INFO, "transmit early interrupt\n");
- priv->xstats.tx_early_irq++;
- }
- if (unlikely(intr_status & DMA_STATUS_TPS)) {
- DBG(intr, INFO, "transmit process stopped\n");
- priv->xstats.tx_process_stopped_irq++;
- stmmac_tx_err(priv);
- }
- if (unlikely(intr_status & DMA_STATUS_FBI)) {
- DBG(intr, INFO, "fatal bus error\n");
- priv->xstats.fatal_bus_error_irq++;
- stmmac_tx_err(priv);
+static void stmmac_dma_interrupt(struct stmmac_priv *priv)
+{
+ unsigned long ioaddr = priv->dev->base_addr;
+ int status;
+
+ status = priv->hw->dma->dma_interrupt(priv->dev->base_addr,
+ &priv->xstats);
+ if (likely(status == handle_tx_rx))
+ _stmmac_schedule(priv);
+
+ else if (unlikely(status == tx_hard_error_bump_tc)) {
+ /* Try to bump up the dma threshold on this failure */
+ if (unlikely(tc != SF_DMA_MODE) && (tc <= 256)) {
+ tc += 64;
+ priv->hw->dma->dma_mode(ioaddr, tc, SF_DMA_MODE);
+ priv->xstats.threshold = tc;
}
- }
-
- /* TX/RX NORMAL interrupts */
- if (intr_status & DMA_STATUS_NIS) {
- priv->xstats.normal_irq_n++;
- if (likely((intr_status & DMA_STATUS_RI) ||
- (intr_status & (DMA_STATUS_TI))))
- _stmmac_schedule(priv);
- }
-
- /* Optional hardware blocks, interrupts should be disabled */
- if (unlikely(intr_status &
- (DMA_STATUS_GPI | DMA_STATUS_GMI | DMA_STATUS_GLI)))
- pr_info("%s: unexpected status %08x\n", __func__, intr_status);
-
- /* Clear the interrupt by writing a logic 1 to the CSR5[15-0] */
- writel((intr_status & 0x1ffff), ioaddr + DMA_STATUS);
-
- DBG(intr, INFO, "\n\n");
+ stmmac_tx_err(priv);
+ } else if (unlikely(status == tx_hard_error))
+ stmmac_tx_err(priv);
return;
}
/* Start the ball rolling... */
DBG(probe, DEBUG, "%s: DMA RX/TX processes started...\n", dev->name);
- stmmac_dma_start_tx(ioaddr);
- stmmac_dma_start_rx(ioaddr);
+ priv->hw->dma->start_tx(ioaddr);
+ priv->hw->dma->start_rx(ioaddr);
#ifdef CONFIG_STMMAC_TIMER
priv->tm->timer_start(tmrate);
free_irq(dev->irq, dev);
/* Stop TX/RX DMA and clear the descriptors */
- stmmac_dma_stop_tx(dev->base_addr);
- stmmac_dma_stop_rx(dev->base_addr);
+ priv->hw->dma->stop_tx(dev->base_addr);
+ priv->hw->dma->stop_rx(dev->base_addr);
/* Release and free the Rx/Tx resources */
free_dma_desc_resources(priv);
priv->hw->desc->prepare_tx_desc(desc, 0, buf2_size,
csum_insertion);
priv->hw->desc->set_tx_owner(desc);
-
priv->tx_skbuff[entry] = NULL;
} else {
desc->des2 = dma_map_single(priv->device, skb->data,
dev->stats.tx_bytes += skb->len;
- /* CSR1 enables the transmit DMA to check for new descriptor */
- writel(1, dev->base_addr + DMA_XMT_POLL_DEMAND);
+ priv->hw->dma->enable_dma_transmission(dev->base_addr);
return NETDEV_TX_OK;
}
/* To handle GMAC own interrupts */
priv->hw->mac->host_irq_status(ioaddr);
}
- stmmac_dma_interrupt(dev);
+
+ stmmac_dma_interrupt(priv);
return IRQ_HANDLED;
}
struct mac_device_info *device;
if (priv->is_gmac)
- device = gmac_setup(ioaddr);
+ device = dwmac1000_setup(ioaddr);
else
- device = mac100_setup(ioaddr);
+ device = dwmac100_setup(ioaddr);
if (!device)
return -ENOMEM;
static int stmmac_dvr_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
+ struct stmmac_priv *priv = netdev_priv(ndev);
struct resource *res;
pr_info("%s:\n\tremoving driver", __func__);
- stmmac_dma_stop_rx(ndev->base_addr);
- stmmac_dma_stop_tx(ndev->base_addr);
+ priv->hw->dma->stop_rx(ndev->base_addr);
+ priv->hw->dma->stop_tx(ndev->base_addr);
stmmac_mac_disable_rx(ndev->base_addr);
stmmac_mac_disable_tx(ndev->base_addr);
napi_disable(&priv->napi);
/* Stop TX/RX DMA */
- stmmac_dma_stop_tx(dev->base_addr);
- stmmac_dma_stop_rx(dev->base_addr);
+ priv->hw->dma->stop_tx(dev->base_addr);
+ priv->hw->dma->stop_rx(dev->base_addr);
/* Clear the Rx/Tx descriptors */
priv->hw->desc->init_rx_desc(priv->dma_rx, priv->dma_rx_size,
dis_ic);
/* Enable the MAC and DMA */
stmmac_mac_enable_rx(ioaddr);
stmmac_mac_enable_tx(ioaddr);
- stmmac_dma_start_tx(ioaddr);
- stmmac_dma_start_rx(ioaddr);
+ priv->hw->dma->start_tx(ioaddr);
+ priv->hw->dma->start_rx(ioaddr);
#ifdef CONFIG_STMMAC_TIMER
priv->tm->timer_start(tmrate);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff