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1130 lines
26 KiB
1130 lines
26 KiB
/* |
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* Combined Ethernet driver for Motorola MPC8xx and MPC82xx. |
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* |
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* Copyright (c) 2003 Intracom S.A. |
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* by Pantelis Antoniou <[email protected]> |
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* |
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* 2005 (c) MontaVista Software, Inc. |
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* Vitaly Bordug <[email protected]> |
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* |
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* Heavily based on original FEC driver by Dan Malek <[email protected]> |
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* and modifications by Joakim Tjernlund <[email protected]> |
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* |
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* This file is licensed under the terms of the GNU General Public License |
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* version 2. This program is licensed "as is" without any warranty of any |
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* kind, whether express or implied. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/string.h> |
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#include <linux/ptrace.h> |
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#include <linux/errno.h> |
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#include <linux/ioport.h> |
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#include <linux/slab.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/skbuff.h> |
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#include <linux/spinlock.h> |
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#include <linux/mii.h> |
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#include <linux/ethtool.h> |
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#include <linux/bitops.h> |
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#include <linux/fs.h> |
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#include <linux/platform_device.h> |
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#include <linux/phy.h> |
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#include <linux/of.h> |
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#include <linux/of_mdio.h> |
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#include <linux/of_platform.h> |
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#include <linux/of_gpio.h> |
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#include <linux/of_net.h> |
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#include <linux/pgtable.h> |
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|
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#include <linux/vmalloc.h> |
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#include <asm/irq.h> |
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#include <linux/uaccess.h> |
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|
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#include "fs_enet.h" |
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|
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/*************************************************/ |
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|
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MODULE_AUTHOR("Pantelis Antoniou <[email protected]>"); |
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MODULE_DESCRIPTION("Freescale Ethernet Driver"); |
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MODULE_LICENSE("GPL"); |
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|
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static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */ |
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module_param(fs_enet_debug, int, 0); |
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MODULE_PARM_DESC(fs_enet_debug, |
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"Freescale bitmapped debugging message enable value"); |
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|
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#define RX_RING_SIZE 32 |
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#define TX_RING_SIZE 64 |
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|
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#ifdef CONFIG_NET_POLL_CONTROLLER |
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static void fs_enet_netpoll(struct net_device *dev); |
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#endif |
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|
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static void fs_set_multicast_list(struct net_device *dev) |
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{ |
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struct fs_enet_private *fep = netdev_priv(dev); |
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|
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(*fep->ops->set_multicast_list)(dev); |
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} |
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|
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static void skb_align(struct sk_buff *skb, int align) |
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{ |
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int off = ((unsigned long)skb->data) & (align - 1); |
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|
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if (off) |
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skb_reserve(skb, align - off); |
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} |
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|
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/* NAPI function */ |
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static int fs_enet_napi(struct napi_struct *napi, int budget) |
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{ |
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struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi); |
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struct net_device *dev = fep->ndev; |
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const struct fs_platform_info *fpi = fep->fpi; |
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cbd_t __iomem *bdp; |
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struct sk_buff *skb, *skbn; |
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int received = 0; |
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u16 pkt_len, sc; |
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int curidx; |
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int dirtyidx, do_wake, do_restart; |
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int tx_left = TX_RING_SIZE; |
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|
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spin_lock(&fep->tx_lock); |
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bdp = fep->dirty_tx; |
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|
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/* clear status bits for napi*/ |
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(*fep->ops->napi_clear_event)(dev); |
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do_wake = do_restart = 0; |
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while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0 && tx_left) { |
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dirtyidx = bdp - fep->tx_bd_base; |
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if (fep->tx_free == fep->tx_ring) |
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break; |
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skb = fep->tx_skbuff[dirtyidx]; |
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|
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/* |
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* Check for errors. |
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*/ |
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if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC | |
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BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) { |
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|
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if (sc & BD_ENET_TX_HB) /* No heartbeat */ |
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dev->stats.tx_heartbeat_errors++; |
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if (sc & BD_ENET_TX_LC) /* Late collision */ |
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dev->stats.tx_window_errors++; |
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if (sc & BD_ENET_TX_RL) /* Retrans limit */ |
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dev->stats.tx_aborted_errors++; |
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if (sc & BD_ENET_TX_UN) /* Underrun */ |
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dev->stats.tx_fifo_errors++; |
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if (sc & BD_ENET_TX_CSL) /* Carrier lost */ |
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dev->stats.tx_carrier_errors++; |
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if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) { |
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dev->stats.tx_errors++; |
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do_restart = 1; |
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} |
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} else |
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dev->stats.tx_packets++; |
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|
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if (sc & BD_ENET_TX_READY) { |
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dev_warn(fep->dev, |
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"HEY! Enet xmit interrupt and TX_READY.\n"); |
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} |
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|
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/* |
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* Deferred means some collisions occurred during transmit, |
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* but we eventually sent the packet OK. |
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*/ |
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if (sc & BD_ENET_TX_DEF) |
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dev->stats.collisions++; |
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|
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/* unmap */ |
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if (fep->mapped_as_page[dirtyidx]) |
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dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp), |
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CBDR_DATLEN(bdp), DMA_TO_DEVICE); |
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else |
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dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
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CBDR_DATLEN(bdp), DMA_TO_DEVICE); |
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|
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/* |
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* Free the sk buffer associated with this last transmit. |
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*/ |
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if (skb) { |
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dev_kfree_skb(skb); |
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fep->tx_skbuff[dirtyidx] = NULL; |
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} |
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|
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/* |
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* Update pointer to next buffer descriptor to be transmitted. |
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*/ |
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if ((sc & BD_ENET_TX_WRAP) == 0) |
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bdp++; |
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else |
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bdp = fep->tx_bd_base; |
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|
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/* |
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* Since we have freed up a buffer, the ring is no longer |
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* full. |
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*/ |
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if (++fep->tx_free == MAX_SKB_FRAGS) |
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do_wake = 1; |
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tx_left--; |
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} |
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fep->dirty_tx = bdp; |
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if (do_restart) |
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(*fep->ops->tx_restart)(dev); |
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spin_unlock(&fep->tx_lock); |
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if (do_wake) |
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netif_wake_queue(dev); |
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/* |
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* First, grab all of the stats for the incoming packet. |
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* These get messed up if we get called due to a busy condition. |
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*/ |
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bdp = fep->cur_rx; |
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|
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while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0 && |
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received < budget) { |
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curidx = bdp - fep->rx_bd_base; |
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|
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/* |
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* Since we have allocated space to hold a complete frame, |
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* the last indicator should be set. |
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*/ |
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if ((sc & BD_ENET_RX_LAST) == 0) |
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dev_warn(fep->dev, "rcv is not +last\n"); |
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|
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/* |
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* Check for errors. |
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*/ |
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if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL | |
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BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) { |
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dev->stats.rx_errors++; |
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/* Frame too long or too short. */ |
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if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) |
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dev->stats.rx_length_errors++; |
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/* Frame alignment */ |
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if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL)) |
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dev->stats.rx_frame_errors++; |
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/* CRC Error */ |
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if (sc & BD_ENET_RX_CR) |
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dev->stats.rx_crc_errors++; |
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/* FIFO overrun */ |
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if (sc & BD_ENET_RX_OV) |
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dev->stats.rx_crc_errors++; |
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skbn = fep->rx_skbuff[curidx]; |
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} else { |
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skb = fep->rx_skbuff[curidx]; |
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|
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/* |
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* Process the incoming frame. |
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*/ |
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dev->stats.rx_packets++; |
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pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */ |
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dev->stats.rx_bytes += pkt_len + 4; |
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|
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if (pkt_len <= fpi->rx_copybreak) { |
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/* +2 to make IP header L1 cache aligned */ |
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skbn = netdev_alloc_skb(dev, pkt_len + 2); |
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if (skbn != NULL) { |
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skb_reserve(skbn, 2); /* align IP header */ |
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skb_copy_from_linear_data(skb, |
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skbn->data, pkt_len); |
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swap(skb, skbn); |
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dma_sync_single_for_cpu(fep->dev, |
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CBDR_BUFADDR(bdp), |
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L1_CACHE_ALIGN(pkt_len), |
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DMA_FROM_DEVICE); |
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} |
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} else { |
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skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE); |
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if (skbn) { |
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dma_addr_t dma; |
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skb_align(skbn, ENET_RX_ALIGN); |
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dma_unmap_single(fep->dev, |
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CBDR_BUFADDR(bdp), |
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L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
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DMA_FROM_DEVICE); |
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dma = dma_map_single(fep->dev, |
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skbn->data, |
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L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
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DMA_FROM_DEVICE); |
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CBDW_BUFADDR(bdp, dma); |
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} |
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} |
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if (skbn != NULL) { |
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skb_put(skb, pkt_len); /* Make room */ |
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skb->protocol = eth_type_trans(skb, dev); |
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received++; |
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netif_receive_skb(skb); |
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} else { |
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dev->stats.rx_dropped++; |
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skbn = skb; |
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} |
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} |
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fep->rx_skbuff[curidx] = skbn; |
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CBDW_DATLEN(bdp, 0); |
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CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY); |
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/* |
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* Update BD pointer to next entry. |
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*/ |
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if ((sc & BD_ENET_RX_WRAP) == 0) |
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bdp++; |
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else |
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bdp = fep->rx_bd_base; |
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|
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(*fep->ops->rx_bd_done)(dev); |
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} |
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fep->cur_rx = bdp; |
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if (received < budget && tx_left) { |
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/* done */ |
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napi_complete_done(napi, received); |
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(*fep->ops->napi_enable)(dev); |
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return received; |
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} |
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return budget; |
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} |
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/* |
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* The interrupt handler. |
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* This is called from the MPC core interrupt. |
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*/ |
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static irqreturn_t |
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fs_enet_interrupt(int irq, void *dev_id) |
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{ |
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struct net_device *dev = dev_id; |
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struct fs_enet_private *fep; |
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const struct fs_platform_info *fpi; |
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u32 int_events; |
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u32 int_clr_events; |
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int nr, napi_ok; |
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int handled; |
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fep = netdev_priv(dev); |
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fpi = fep->fpi; |
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nr = 0; |
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while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) { |
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nr++; |
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int_clr_events = int_events; |
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int_clr_events &= ~fep->ev_napi; |
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(*fep->ops->clear_int_events)(dev, int_clr_events); |
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if (int_events & fep->ev_err) |
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(*fep->ops->ev_error)(dev, int_events); |
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if (int_events & fep->ev) { |
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napi_ok = napi_schedule_prep(&fep->napi); |
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(*fep->ops->napi_disable)(dev); |
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(*fep->ops->clear_int_events)(dev, fep->ev_napi); |
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/* NOTE: it is possible for FCCs in NAPI mode */ |
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/* to submit a spurious interrupt while in poll */ |
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if (napi_ok) |
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__napi_schedule(&fep->napi); |
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} |
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} |
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handled = nr > 0; |
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return IRQ_RETVAL(handled); |
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} |
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void fs_init_bds(struct net_device *dev) |
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{ |
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struct fs_enet_private *fep = netdev_priv(dev); |
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cbd_t __iomem *bdp; |
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struct sk_buff *skb; |
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int i; |
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|
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fs_cleanup_bds(dev); |
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fep->dirty_tx = fep->cur_tx = fep->tx_bd_base; |
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fep->tx_free = fep->tx_ring; |
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fep->cur_rx = fep->rx_bd_base; |
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|
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/* |
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* Initialize the receive buffer descriptors. |
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*/ |
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for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { |
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skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE); |
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if (skb == NULL) |
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break; |
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|
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skb_align(skb, ENET_RX_ALIGN); |
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fep->rx_skbuff[i] = skb; |
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CBDW_BUFADDR(bdp, |
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dma_map_single(fep->dev, skb->data, |
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L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
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DMA_FROM_DEVICE)); |
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CBDW_DATLEN(bdp, 0); /* zero */ |
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CBDW_SC(bdp, BD_ENET_RX_EMPTY | |
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((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP)); |
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} |
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/* |
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* if we failed, fillup remainder |
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*/ |
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for (; i < fep->rx_ring; i++, bdp++) { |
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fep->rx_skbuff[i] = NULL; |
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CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP); |
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} |
|
|
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/* |
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* ...and the same for transmit. |
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*/ |
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for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { |
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fep->tx_skbuff[i] = NULL; |
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CBDW_BUFADDR(bdp, 0); |
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CBDW_DATLEN(bdp, 0); |
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CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP); |
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} |
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} |
|
|
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void fs_cleanup_bds(struct net_device *dev) |
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{ |
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struct fs_enet_private *fep = netdev_priv(dev); |
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struct sk_buff *skb; |
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cbd_t __iomem *bdp; |
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int i; |
|
|
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/* |
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* Reset SKB transmit buffers. |
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*/ |
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for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { |
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if ((skb = fep->tx_skbuff[i]) == NULL) |
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continue; |
|
|
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/* unmap */ |
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dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
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skb->len, DMA_TO_DEVICE); |
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|
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fep->tx_skbuff[i] = NULL; |
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dev_kfree_skb(skb); |
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} |
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|
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/* |
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* Reset SKB receive buffers |
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*/ |
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for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { |
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if ((skb = fep->rx_skbuff[i]) == NULL) |
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continue; |
|
|
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/* unmap */ |
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dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
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L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
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DMA_FROM_DEVICE); |
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|
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fep->rx_skbuff[i] = NULL; |
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|
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dev_kfree_skb(skb); |
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} |
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} |
|
|
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/**********************************************************************************/ |
|
|
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#ifdef CONFIG_FS_ENET_MPC5121_FEC |
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/* |
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* MPC5121 FEC requeries 4-byte alignment for TX data buffer! |
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*/ |
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static struct sk_buff *tx_skb_align_workaround(struct net_device *dev, |
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struct sk_buff *skb) |
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{ |
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struct sk_buff *new_skb; |
|
|
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if (skb_linearize(skb)) |
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return NULL; |
|
|
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/* Alloc new skb */ |
|
new_skb = netdev_alloc_skb(dev, skb->len + 4); |
|
if (!new_skb) |
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return NULL; |
|
|
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/* Make sure new skb is properly aligned */ |
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skb_align(new_skb, 4); |
|
|
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/* Copy data to new skb ... */ |
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skb_copy_from_linear_data(skb, new_skb->data, skb->len); |
|
skb_put(new_skb, skb->len); |
|
|
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/* ... and free an old one */ |
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dev_kfree_skb_any(skb); |
|
|
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return new_skb; |
|
} |
|
#endif |
|
|
|
static netdev_tx_t |
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fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
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struct fs_enet_private *fep = netdev_priv(dev); |
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cbd_t __iomem *bdp; |
|
int curidx; |
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u16 sc; |
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int nr_frags; |
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skb_frag_t *frag; |
|
int len; |
|
#ifdef CONFIG_FS_ENET_MPC5121_FEC |
|
int is_aligned = 1; |
|
int i; |
|
|
|
if (!IS_ALIGNED((unsigned long)skb->data, 4)) { |
|
is_aligned = 0; |
|
} else { |
|
nr_frags = skb_shinfo(skb)->nr_frags; |
|
frag = skb_shinfo(skb)->frags; |
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for (i = 0; i < nr_frags; i++, frag++) { |
|
if (!IS_ALIGNED(skb_frag_off(frag), 4)) { |
|
is_aligned = 0; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (!is_aligned) { |
|
skb = tx_skb_align_workaround(dev, skb); |
|
if (!skb) { |
|
/* |
|
* We have lost packet due to memory allocation error |
|
* in tx_skb_align_workaround(). Hopefully original |
|
* skb is still valid, so try transmit it later. |
|
*/ |
|
return NETDEV_TX_BUSY; |
|
} |
|
} |
|
#endif |
|
|
|
spin_lock(&fep->tx_lock); |
|
|
|
/* |
|
* Fill in a Tx ring entry |
|
*/ |
|
bdp = fep->cur_tx; |
|
|
|
nr_frags = skb_shinfo(skb)->nr_frags; |
|
if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) { |
|
netif_stop_queue(dev); |
|
spin_unlock(&fep->tx_lock); |
|
|
|
/* |
|
* Ooops. All transmit buffers are full. Bail out. |
|
* This should not happen, since the tx queue should be stopped. |
|
*/ |
|
dev_warn(fep->dev, "tx queue full!.\n"); |
|
return NETDEV_TX_BUSY; |
|
} |
|
|
|
curidx = bdp - fep->tx_bd_base; |
|
|
|
len = skb->len; |
|
dev->stats.tx_bytes += len; |
|
if (nr_frags) |
|
len -= skb->data_len; |
|
fep->tx_free -= nr_frags + 1; |
|
/* |
|
* Push the data cache so the CPM does not get stale memory data. |
|
*/ |
|
CBDW_BUFADDR(bdp, dma_map_single(fep->dev, |
|
skb->data, len, DMA_TO_DEVICE)); |
|
CBDW_DATLEN(bdp, len); |
|
|
|
fep->mapped_as_page[curidx] = 0; |
|
frag = skb_shinfo(skb)->frags; |
|
while (nr_frags) { |
|
CBDC_SC(bdp, |
|
BD_ENET_TX_STATS | BD_ENET_TX_INTR | BD_ENET_TX_LAST | |
|
BD_ENET_TX_TC); |
|
CBDS_SC(bdp, BD_ENET_TX_READY); |
|
|
|
if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) { |
|
bdp++; |
|
curidx++; |
|
} else { |
|
bdp = fep->tx_bd_base; |
|
curidx = 0; |
|
} |
|
|
|
len = skb_frag_size(frag); |
|
CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len, |
|
DMA_TO_DEVICE)); |
|
CBDW_DATLEN(bdp, len); |
|
|
|
fep->tx_skbuff[curidx] = NULL; |
|
fep->mapped_as_page[curidx] = 1; |
|
|
|
frag++; |
|
nr_frags--; |
|
} |
|
|
|
/* Trigger transmission start */ |
|
sc = BD_ENET_TX_READY | BD_ENET_TX_INTR | |
|
BD_ENET_TX_LAST | BD_ENET_TX_TC; |
|
|
|
/* note that while FEC does not have this bit |
|
* it marks it as available for software use |
|
* yay for hw reuse :) */ |
|
if (skb->len <= 60) |
|
sc |= BD_ENET_TX_PAD; |
|
CBDC_SC(bdp, BD_ENET_TX_STATS); |
|
CBDS_SC(bdp, sc); |
|
|
|
/* Save skb pointer. */ |
|
fep->tx_skbuff[curidx] = skb; |
|
|
|
/* If this was the last BD in the ring, start at the beginning again. */ |
|
if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) |
|
bdp++; |
|
else |
|
bdp = fep->tx_bd_base; |
|
fep->cur_tx = bdp; |
|
|
|
if (fep->tx_free < MAX_SKB_FRAGS) |
|
netif_stop_queue(dev); |
|
|
|
skb_tx_timestamp(skb); |
|
|
|
(*fep->ops->tx_kickstart)(dev); |
|
|
|
spin_unlock(&fep->tx_lock); |
|
|
|
return NETDEV_TX_OK; |
|
} |
|
|
|
static void fs_timeout_work(struct work_struct *work) |
|
{ |
|
struct fs_enet_private *fep = container_of(work, struct fs_enet_private, |
|
timeout_work); |
|
struct net_device *dev = fep->ndev; |
|
unsigned long flags; |
|
int wake = 0; |
|
|
|
dev->stats.tx_errors++; |
|
|
|
spin_lock_irqsave(&fep->lock, flags); |
|
|
|
if (dev->flags & IFF_UP) { |
|
phy_stop(dev->phydev); |
|
(*fep->ops->stop)(dev); |
|
(*fep->ops->restart)(dev); |
|
} |
|
|
|
phy_start(dev->phydev); |
|
wake = fep->tx_free >= MAX_SKB_FRAGS && |
|
!(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY); |
|
spin_unlock_irqrestore(&fep->lock, flags); |
|
|
|
if (wake) |
|
netif_wake_queue(dev); |
|
} |
|
|
|
static void fs_timeout(struct net_device *dev, unsigned int txqueue) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
|
|
schedule_work(&fep->timeout_work); |
|
} |
|
|
|
/*----------------------------------------------------------------------------- |
|
* generic link-change handler - should be sufficient for most cases |
|
*-----------------------------------------------------------------------------*/ |
|
static void generic_adjust_link(struct net_device *dev) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
struct phy_device *phydev = dev->phydev; |
|
int new_state = 0; |
|
|
|
if (phydev->link) { |
|
/* adjust to duplex mode */ |
|
if (phydev->duplex != fep->oldduplex) { |
|
new_state = 1; |
|
fep->oldduplex = phydev->duplex; |
|
} |
|
|
|
if (phydev->speed != fep->oldspeed) { |
|
new_state = 1; |
|
fep->oldspeed = phydev->speed; |
|
} |
|
|
|
if (!fep->oldlink) { |
|
new_state = 1; |
|
fep->oldlink = 1; |
|
} |
|
|
|
if (new_state) |
|
fep->ops->restart(dev); |
|
} else if (fep->oldlink) { |
|
new_state = 1; |
|
fep->oldlink = 0; |
|
fep->oldspeed = 0; |
|
fep->oldduplex = -1; |
|
} |
|
|
|
if (new_state && netif_msg_link(fep)) |
|
phy_print_status(phydev); |
|
} |
|
|
|
|
|
static void fs_adjust_link(struct net_device *dev) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&fep->lock, flags); |
|
|
|
if(fep->ops->adjust_link) |
|
fep->ops->adjust_link(dev); |
|
else |
|
generic_adjust_link(dev); |
|
|
|
spin_unlock_irqrestore(&fep->lock, flags); |
|
} |
|
|
|
static int fs_init_phy(struct net_device *dev) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
struct phy_device *phydev; |
|
phy_interface_t iface; |
|
|
|
fep->oldlink = 0; |
|
fep->oldspeed = 0; |
|
fep->oldduplex = -1; |
|
|
|
iface = fep->fpi->use_rmii ? |
|
PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII; |
|
|
|
phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0, |
|
iface); |
|
if (!phydev) { |
|
dev_err(&dev->dev, "Could not attach to PHY\n"); |
|
return -ENODEV; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int fs_enet_open(struct net_device *dev) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
int r; |
|
int err; |
|
|
|
/* to initialize the fep->cur_rx,... */ |
|
/* not doing this, will cause a crash in fs_enet_napi */ |
|
fs_init_bds(fep->ndev); |
|
|
|
napi_enable(&fep->napi); |
|
|
|
/* Install our interrupt handler. */ |
|
r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED, |
|
"fs_enet-mac", dev); |
|
if (r != 0) { |
|
dev_err(fep->dev, "Could not allocate FS_ENET IRQ!"); |
|
napi_disable(&fep->napi); |
|
return -EINVAL; |
|
} |
|
|
|
err = fs_init_phy(dev); |
|
if (err) { |
|
free_irq(fep->interrupt, dev); |
|
napi_disable(&fep->napi); |
|
return err; |
|
} |
|
phy_start(dev->phydev); |
|
|
|
netif_start_queue(dev); |
|
|
|
return 0; |
|
} |
|
|
|
static int fs_enet_close(struct net_device *dev) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
netif_stop_queue(dev); |
|
netif_carrier_off(dev); |
|
napi_disable(&fep->napi); |
|
cancel_work_sync(&fep->timeout_work); |
|
phy_stop(dev->phydev); |
|
|
|
spin_lock_irqsave(&fep->lock, flags); |
|
spin_lock(&fep->tx_lock); |
|
(*fep->ops->stop)(dev); |
|
spin_unlock(&fep->tx_lock); |
|
spin_unlock_irqrestore(&fep->lock, flags); |
|
|
|
/* release any irqs */ |
|
phy_disconnect(dev->phydev); |
|
free_irq(fep->interrupt, dev); |
|
|
|
return 0; |
|
} |
|
|
|
/*************************************************************************/ |
|
|
|
static void fs_get_drvinfo(struct net_device *dev, |
|
struct ethtool_drvinfo *info) |
|
{ |
|
strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); |
|
} |
|
|
|
static int fs_get_regs_len(struct net_device *dev) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
|
|
return (*fep->ops->get_regs_len)(dev); |
|
} |
|
|
|
static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs, |
|
void *p) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
unsigned long flags; |
|
int r, len; |
|
|
|
len = regs->len; |
|
|
|
spin_lock_irqsave(&fep->lock, flags); |
|
r = (*fep->ops->get_regs)(dev, p, &len); |
|
spin_unlock_irqrestore(&fep->lock, flags); |
|
|
|
if (r == 0) |
|
regs->version = 0; |
|
} |
|
|
|
static u32 fs_get_msglevel(struct net_device *dev) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
return fep->msg_enable; |
|
} |
|
|
|
static void fs_set_msglevel(struct net_device *dev, u32 value) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
fep->msg_enable = value; |
|
} |
|
|
|
static int fs_get_tunable(struct net_device *dev, |
|
const struct ethtool_tunable *tuna, void *data) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
struct fs_platform_info *fpi = fep->fpi; |
|
int ret = 0; |
|
|
|
switch (tuna->id) { |
|
case ETHTOOL_RX_COPYBREAK: |
|
*(u32 *)data = fpi->rx_copybreak; |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int fs_set_tunable(struct net_device *dev, |
|
const struct ethtool_tunable *tuna, const void *data) |
|
{ |
|
struct fs_enet_private *fep = netdev_priv(dev); |
|
struct fs_platform_info *fpi = fep->fpi; |
|
int ret = 0; |
|
|
|
switch (tuna->id) { |
|
case ETHTOOL_RX_COPYBREAK: |
|
fpi->rx_copybreak = *(u32 *)data; |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static const struct ethtool_ops fs_ethtool_ops = { |
|
.get_drvinfo = fs_get_drvinfo, |
|
.get_regs_len = fs_get_regs_len, |
|
.nway_reset = phy_ethtool_nway_reset, |
|
.get_link = ethtool_op_get_link, |
|
.get_msglevel = fs_get_msglevel, |
|
.set_msglevel = fs_set_msglevel, |
|
.get_regs = fs_get_regs, |
|
.get_ts_info = ethtool_op_get_ts_info, |
|
.get_link_ksettings = phy_ethtool_get_link_ksettings, |
|
.set_link_ksettings = phy_ethtool_set_link_ksettings, |
|
.get_tunable = fs_get_tunable, |
|
.set_tunable = fs_set_tunable, |
|
}; |
|
|
|
extern int fs_mii_connect(struct net_device *dev); |
|
extern void fs_mii_disconnect(struct net_device *dev); |
|
|
|
/**************************************************************************************/ |
|
|
|
#ifdef CONFIG_FS_ENET_HAS_FEC |
|
#define IS_FEC(match) ((match)->data == &fs_fec_ops) |
|
#else |
|
#define IS_FEC(match) 0 |
|
#endif |
|
|
|
static const struct net_device_ops fs_enet_netdev_ops = { |
|
.ndo_open = fs_enet_open, |
|
.ndo_stop = fs_enet_close, |
|
.ndo_start_xmit = fs_enet_start_xmit, |
|
.ndo_tx_timeout = fs_timeout, |
|
.ndo_set_rx_mode = fs_set_multicast_list, |
|
.ndo_eth_ioctl = phy_do_ioctl_running, |
|
.ndo_validate_addr = eth_validate_addr, |
|
.ndo_set_mac_address = eth_mac_addr, |
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
.ndo_poll_controller = fs_enet_netpoll, |
|
#endif |
|
}; |
|
|
|
static const struct of_device_id fs_enet_match[]; |
|
static int fs_enet_probe(struct platform_device *ofdev) |
|
{ |
|
const struct of_device_id *match; |
|
struct net_device *ndev; |
|
struct fs_enet_private *fep; |
|
struct fs_platform_info *fpi; |
|
const u32 *data; |
|
struct clk *clk; |
|
int err; |
|
const char *phy_connection_type; |
|
int privsize, len, ret = -ENODEV; |
|
|
|
match = of_match_device(fs_enet_match, &ofdev->dev); |
|
if (!match) |
|
return -EINVAL; |
|
|
|
fpi = kzalloc(sizeof(*fpi), GFP_KERNEL); |
|
if (!fpi) |
|
return -ENOMEM; |
|
|
|
if (!IS_FEC(match)) { |
|
data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len); |
|
if (!data || len != 4) |
|
goto out_free_fpi; |
|
|
|
fpi->cp_command = *data; |
|
} |
|
|
|
fpi->rx_ring = RX_RING_SIZE; |
|
fpi->tx_ring = TX_RING_SIZE; |
|
fpi->rx_copybreak = 240; |
|
fpi->napi_weight = 17; |
|
fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0); |
|
if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) { |
|
err = of_phy_register_fixed_link(ofdev->dev.of_node); |
|
if (err) |
|
goto out_free_fpi; |
|
|
|
/* In the case of a fixed PHY, the DT node associated |
|
* to the PHY is the Ethernet MAC DT node. |
|
*/ |
|
fpi->phy_node = of_node_get(ofdev->dev.of_node); |
|
} |
|
|
|
if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) { |
|
phy_connection_type = of_get_property(ofdev->dev.of_node, |
|
"phy-connection-type", NULL); |
|
if (phy_connection_type && !strcmp("rmii", phy_connection_type)) |
|
fpi->use_rmii = 1; |
|
} |
|
|
|
/* make clock lookup non-fatal (the driver is shared among platforms), |
|
* but require enable to succeed when a clock was specified/found, |
|
* keep a reference to the clock upon successful acquisition |
|
*/ |
|
clk = devm_clk_get(&ofdev->dev, "per"); |
|
if (!IS_ERR(clk)) { |
|
ret = clk_prepare_enable(clk); |
|
if (ret) |
|
goto out_deregister_fixed_link; |
|
|
|
fpi->clk_per = clk; |
|
} |
|
|
|
privsize = sizeof(*fep) + |
|
sizeof(struct sk_buff **) * |
|
(fpi->rx_ring + fpi->tx_ring) + |
|
sizeof(char) * fpi->tx_ring; |
|
|
|
ndev = alloc_etherdev(privsize); |
|
if (!ndev) { |
|
ret = -ENOMEM; |
|
goto out_put; |
|
} |
|
|
|
SET_NETDEV_DEV(ndev, &ofdev->dev); |
|
platform_set_drvdata(ofdev, ndev); |
|
|
|
fep = netdev_priv(ndev); |
|
fep->dev = &ofdev->dev; |
|
fep->ndev = ndev; |
|
fep->fpi = fpi; |
|
fep->ops = match->data; |
|
|
|
ret = fep->ops->setup_data(ndev); |
|
if (ret) |
|
goto out_free_dev; |
|
|
|
fep->rx_skbuff = (struct sk_buff **)&fep[1]; |
|
fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring; |
|
fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring + |
|
fpi->tx_ring); |
|
|
|
spin_lock_init(&fep->lock); |
|
spin_lock_init(&fep->tx_lock); |
|
|
|
of_get_mac_address(ofdev->dev.of_node, ndev->dev_addr); |
|
|
|
ret = fep->ops->allocate_bd(ndev); |
|
if (ret) |
|
goto out_cleanup_data; |
|
|
|
fep->rx_bd_base = fep->ring_base; |
|
fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring; |
|
|
|
fep->tx_ring = fpi->tx_ring; |
|
fep->rx_ring = fpi->rx_ring; |
|
|
|
ndev->netdev_ops = &fs_enet_netdev_ops; |
|
ndev->watchdog_timeo = 2 * HZ; |
|
INIT_WORK(&fep->timeout_work, fs_timeout_work); |
|
netif_napi_add(ndev, &fep->napi, fs_enet_napi, fpi->napi_weight); |
|
|
|
ndev->ethtool_ops = &fs_ethtool_ops; |
|
|
|
netif_carrier_off(ndev); |
|
|
|
ndev->features |= NETIF_F_SG; |
|
|
|
ret = register_netdev(ndev); |
|
if (ret) |
|
goto out_free_bd; |
|
|
|
pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr); |
|
|
|
return 0; |
|
|
|
out_free_bd: |
|
fep->ops->free_bd(ndev); |
|
out_cleanup_data: |
|
fep->ops->cleanup_data(ndev); |
|
out_free_dev: |
|
free_netdev(ndev); |
|
out_put: |
|
clk_disable_unprepare(fpi->clk_per); |
|
out_deregister_fixed_link: |
|
of_node_put(fpi->phy_node); |
|
if (of_phy_is_fixed_link(ofdev->dev.of_node)) |
|
of_phy_deregister_fixed_link(ofdev->dev.of_node); |
|
out_free_fpi: |
|
kfree(fpi); |
|
return ret; |
|
} |
|
|
|
static int fs_enet_remove(struct platform_device *ofdev) |
|
{ |
|
struct net_device *ndev = platform_get_drvdata(ofdev); |
|
struct fs_enet_private *fep = netdev_priv(ndev); |
|
|
|
unregister_netdev(ndev); |
|
|
|
fep->ops->free_bd(ndev); |
|
fep->ops->cleanup_data(ndev); |
|
dev_set_drvdata(fep->dev, NULL); |
|
of_node_put(fep->fpi->phy_node); |
|
clk_disable_unprepare(fep->fpi->clk_per); |
|
if (of_phy_is_fixed_link(ofdev->dev.of_node)) |
|
of_phy_deregister_fixed_link(ofdev->dev.of_node); |
|
free_netdev(ndev); |
|
return 0; |
|
} |
|
|
|
static const struct of_device_id fs_enet_match[] = { |
|
#ifdef CONFIG_FS_ENET_HAS_SCC |
|
{ |
|
.compatible = "fsl,cpm1-scc-enet", |
|
.data = (void *)&fs_scc_ops, |
|
}, |
|
{ |
|
.compatible = "fsl,cpm2-scc-enet", |
|
.data = (void *)&fs_scc_ops, |
|
}, |
|
#endif |
|
#ifdef CONFIG_FS_ENET_HAS_FCC |
|
{ |
|
.compatible = "fsl,cpm2-fcc-enet", |
|
.data = (void *)&fs_fcc_ops, |
|
}, |
|
#endif |
|
#ifdef CONFIG_FS_ENET_HAS_FEC |
|
#ifdef CONFIG_FS_ENET_MPC5121_FEC |
|
{ |
|
.compatible = "fsl,mpc5121-fec", |
|
.data = (void *)&fs_fec_ops, |
|
}, |
|
{ |
|
.compatible = "fsl,mpc5125-fec", |
|
.data = (void *)&fs_fec_ops, |
|
}, |
|
#else |
|
{ |
|
.compatible = "fsl,pq1-fec-enet", |
|
.data = (void *)&fs_fec_ops, |
|
}, |
|
#endif |
|
#endif |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(of, fs_enet_match); |
|
|
|
static struct platform_driver fs_enet_driver = { |
|
.driver = { |
|
.name = "fs_enet", |
|
.of_match_table = fs_enet_match, |
|
}, |
|
.probe = fs_enet_probe, |
|
.remove = fs_enet_remove, |
|
}; |
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER |
|
static void fs_enet_netpoll(struct net_device *dev) |
|
{ |
|
disable_irq(dev->irq); |
|
fs_enet_interrupt(dev->irq, dev); |
|
enable_irq(dev->irq); |
|
} |
|
#endif |
|
|
|
module_platform_driver(fs_enet_driver);
|
|
|