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Diffstat (limited to 'drivers/net/ibm_emac/ibm_emac_core.c')
-rw-r--r--drivers/net/ibm_emac/ibm_emac_core.c2263
1 files changed, 0 insertions, 2263 deletions
diff --git a/drivers/net/ibm_emac/ibm_emac_core.c b/drivers/net/ibm_emac/ibm_emac_core.c
deleted file mode 100644
index 73664f226f3..00000000000
--- a/drivers/net/ibm_emac/ibm_emac_core.c
+++ /dev/null
@@ -1,2263 +0,0 @@
-/*
- * drivers/net/ibm_emac/ibm_emac_core.c
- *
- * Driver for PowerPC 4xx on-chip ethernet controller.
- *
- * Copyright (c) 2004, 2005 Zultys Technologies.
- * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
- *
- * Based on original work by
- * Matt Porter <mporter@kernel.crashing.org>
- * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
- * Armin Kuster <akuster@mvista.com>
- * Johnnie Peters <jpeters@mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/crc32.h>
-#include <linux/ethtool.h>
-#include <linux/mii.h>
-#include <linux/bitops.h>
-
-#include <asm/processor.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/uaccess.h>
-#include <asm/ocp.h>
-
-#include "ibm_emac_core.h"
-#include "ibm_emac_debug.h"
-
-/*
- * Lack of dma_unmap_???? calls is intentional.
- *
- * API-correct usage requires additional support state information to be
- * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
- * EMAC design (e.g. TX buffer passed from network stack can be split into
- * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
- * maintaining such information will add additional overhead.
- * Current DMA API implementation for 4xx processors only ensures cache coherency
- * and dma_unmap_???? routines are empty and are likely to stay this way.
- * I decided to omit dma_unmap_??? calls because I don't want to add additional
- * complexity just for the sake of following some abstract API, when it doesn't
- * add any real benefit to the driver. I understand that this decision maybe
- * controversial, but I really tried to make code API-correct and efficient
- * at the same time and didn't come up with code I liked :(. --ebs
- */
-
-#define DRV_NAME "emac"
-#define DRV_VERSION "3.54"
-#define DRV_DESC "PPC 4xx OCP EMAC driver"
-
-MODULE_DESCRIPTION(DRV_DESC);
-MODULE_AUTHOR
- ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
-MODULE_LICENSE("GPL");
-
-/* minimum number of free TX descriptors required to wake up TX process */
-#define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
-
-/* If packet size is less than this number, we allocate small skb and copy packet
- * contents into it instead of just sending original big skb up
- */
-#define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD
-
-/* Since multiple EMACs share MDIO lines in various ways, we need
- * to avoid re-using the same PHY ID in cases where the arch didn't
- * setup precise phy_map entries
- */
-static u32 busy_phy_map;
-
-#if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) && \
- (defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR))
-/* 405EP has "EMAC to PHY Control Register" (CPC0_EPCTL) which can help us
- * with PHY RX clock problem.
- * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX, which
- * also allows controlling each EMAC clock
- */
-static inline void EMAC_RX_CLK_TX(int idx)
-{
- unsigned long flags;
- local_irq_save(flags);
-
-#if defined(CONFIG_405EP)
- mtdcr(0xf3, mfdcr(0xf3) | (1 << idx));
-#else /* CONFIG_440EP || CONFIG_440GR */
- SDR_WRITE(DCRN_SDR_MFR, SDR_READ(DCRN_SDR_MFR) | (0x08000000 >> idx));
-#endif
-
- local_irq_restore(flags);
-}
-
-static inline void EMAC_RX_CLK_DEFAULT(int idx)
-{
- unsigned long flags;
- local_irq_save(flags);
-
-#if defined(CONFIG_405EP)
- mtdcr(0xf3, mfdcr(0xf3) & ~(1 << idx));
-#else /* CONFIG_440EP */
- SDR_WRITE(DCRN_SDR_MFR, SDR_READ(DCRN_SDR_MFR) & ~(0x08000000 >> idx));
-#endif
-
- local_irq_restore(flags);
-}
-#else
-#define EMAC_RX_CLK_TX(idx) ((void)0)
-#define EMAC_RX_CLK_DEFAULT(idx) ((void)0)
-#endif
-
-#if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) && defined(CONFIG_440GX)
-/* We can switch Ethernet clock to the internal source through SDR0_MFR[ECS],
- * unfortunately this is less flexible than 440EP case, because it's a global
- * setting for all EMACs, therefore we do this clock trick only during probe.
- */
-#define EMAC_CLK_INTERNAL SDR_WRITE(DCRN_SDR_MFR, \
- SDR_READ(DCRN_SDR_MFR) | 0x08000000)
-#define EMAC_CLK_EXTERNAL SDR_WRITE(DCRN_SDR_MFR, \
- SDR_READ(DCRN_SDR_MFR) & ~0x08000000)
-#else
-#define EMAC_CLK_INTERNAL ((void)0)
-#define EMAC_CLK_EXTERNAL ((void)0)
-#endif
-
-/* I don't want to litter system log with timeout errors
- * when we have brain-damaged PHY.
- */
-static inline void emac_report_timeout_error(struct ocp_enet_private *dev,
- const char *error)
-{
-#if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX)
- DBG("%d: %s" NL, dev->def->index, error);
-#else
- if (net_ratelimit())
- printk(KERN_ERR "emac%d: %s\n", dev->def->index, error);
-#endif
-}
-
-/* PHY polling intervals */
-#define PHY_POLL_LINK_ON HZ
-#define PHY_POLL_LINK_OFF (HZ / 5)
-
-/* Graceful stop timeouts in us.
- * We should allow up to 1 frame time (full-duplex, ignoring collisions)
- */
-#define STOP_TIMEOUT_10 1230
-#define STOP_TIMEOUT_100 124
-#define STOP_TIMEOUT_1000 13
-#define STOP_TIMEOUT_1000_JUMBO 73
-
-/* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
-static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
- "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
- "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
- "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
- "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
- "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
- "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
- "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
- "rx_bad_packet", "rx_runt_packet", "rx_short_event",
- "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
- "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
- "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
- "tx_bd_excessive_collisions", "tx_bd_late_collision",
- "tx_bd_multple_collisions", "tx_bd_single_collision",
- "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
- "tx_errors"
-};
-
-static irqreturn_t emac_irq(int irq, void *dev_instance);
-static void emac_clean_tx_ring(struct ocp_enet_private *dev);
-
-static inline int emac_phy_supports_gige(int phy_mode)
-{
- return phy_mode == PHY_MODE_GMII ||
- phy_mode == PHY_MODE_RGMII ||
- phy_mode == PHY_MODE_TBI ||
- phy_mode == PHY_MODE_RTBI;
-}
-
-static inline int emac_phy_gpcs(int phy_mode)
-{
- return phy_mode == PHY_MODE_TBI ||
- phy_mode == PHY_MODE_RTBI;
-}
-
-static inline void emac_tx_enable(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- unsigned long flags;
- u32 r;
-
- local_irq_save(flags);
-
- DBG("%d: tx_enable" NL, dev->def->index);
-
- r = in_be32(&p->mr0);
- if (!(r & EMAC_MR0_TXE))
- out_be32(&p->mr0, r | EMAC_MR0_TXE);
- local_irq_restore(flags);
-}
-
-static void emac_tx_disable(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- unsigned long flags;
- u32 r;
-
- local_irq_save(flags);
-
- DBG("%d: tx_disable" NL, dev->def->index);
-
- r = in_be32(&p->mr0);
- if (r & EMAC_MR0_TXE) {
- int n = dev->stop_timeout;
- out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
- while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
- udelay(1);
- --n;
- }
- if (unlikely(!n))
- emac_report_timeout_error(dev, "TX disable timeout");
- }
- local_irq_restore(flags);
-}
-
-static void emac_rx_enable(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- unsigned long flags;
- u32 r;
-
- local_irq_save(flags);
- if (unlikely(dev->commac.rx_stopped))
- goto out;
-
- DBG("%d: rx_enable" NL, dev->def->index);
-
- r = in_be32(&p->mr0);
- if (!(r & EMAC_MR0_RXE)) {
- if (unlikely(!(r & EMAC_MR0_RXI))) {
- /* Wait if previous async disable is still in progress */
- int n = dev->stop_timeout;
- while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
- udelay(1);
- --n;
- }
- if (unlikely(!n))
- emac_report_timeout_error(dev,
- "RX disable timeout");
- }
- out_be32(&p->mr0, r | EMAC_MR0_RXE);
- }
- out:
- local_irq_restore(flags);
-}
-
-static void emac_rx_disable(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- unsigned long flags;
- u32 r;
-
- local_irq_save(flags);
-
- DBG("%d: rx_disable" NL, dev->def->index);
-
- r = in_be32(&p->mr0);
- if (r & EMAC_MR0_RXE) {
- int n = dev->stop_timeout;
- out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
- while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
- udelay(1);
- --n;
- }
- if (unlikely(!n))
- emac_report_timeout_error(dev, "RX disable timeout");
- }
- local_irq_restore(flags);
-}
-
-static inline void emac_rx_disable_async(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- unsigned long flags;
- u32 r;
-
- local_irq_save(flags);
-
- DBG("%d: rx_disable_async" NL, dev->def->index);
-
- r = in_be32(&p->mr0);
- if (r & EMAC_MR0_RXE)
- out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
- local_irq_restore(flags);
-}
-
-static int emac_reset(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- unsigned long flags;
- int n = 20;
-
- DBG("%d: reset" NL, dev->def->index);
-
- local_irq_save(flags);
-
- if (!dev->reset_failed) {
- /* 40x erratum suggests stopping RX channel before reset,
- * we stop TX as well
- */
- emac_rx_disable(dev);
- emac_tx_disable(dev);
- }
-
- out_be32(&p->mr0, EMAC_MR0_SRST);
- while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
- --n;
- local_irq_restore(flags);
-
- if (n) {
- dev->reset_failed = 0;
- return 0;
- } else {
- emac_report_timeout_error(dev, "reset timeout");
- dev->reset_failed = 1;
- return -ETIMEDOUT;
- }
-}
-
-static void emac_hash_mc(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- u16 gaht[4] = { 0 };
- struct dev_mc_list *dmi;
-
- DBG("%d: hash_mc %d" NL, dev->def->index, dev->ndev->mc_count);
-
- for (dmi = dev->ndev->mc_list; dmi; dmi = dmi->next) {
- int bit;
- DECLARE_MAC_BUF(mac);
- DBG2("%d: mc %s" NL,
- dev->def->index, print_mac(mac, dmi->dmi_addr));
-
- bit = 63 - (ether_crc(ETH_ALEN, dmi->dmi_addr) >> 26);
- gaht[bit >> 4] |= 0x8000 >> (bit & 0x0f);
- }
- out_be32(&p->gaht1, gaht[0]);
- out_be32(&p->gaht2, gaht[1]);
- out_be32(&p->gaht3, gaht[2]);
- out_be32(&p->gaht4, gaht[3]);
-}
-
-static inline u32 emac_iff2rmr(struct net_device *ndev)
-{
- u32 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE |
- EMAC_RMR_BASE;
-
- if (ndev->flags & IFF_PROMISC)
- r |= EMAC_RMR_PME;
- else if (ndev->flags & IFF_ALLMULTI || ndev->mc_count > 32)
- r |= EMAC_RMR_PMME;
- else if (ndev->mc_count > 0)
- r |= EMAC_RMR_MAE;
-
- return r;
-}
-
-static inline int emac_opb_mhz(void)
-{
- return (ocp_sys_info.opb_bus_freq + 500000) / 1000000;
-}
-
-/* BHs disabled */
-static int emac_configure(struct ocp_enet_private *dev)
-{
- struct emac_regs __iomem *p = dev->emacp;
- struct net_device *ndev = dev->ndev;
- int gige;
- u32 r;
-
- DBG("%d: configure" NL, dev->def->index);
-
- if (emac_reset(dev) < 0)
- return -ETIMEDOUT;
-
- tah_reset(dev->tah_dev);
-
- /* Mode register */
- r = EMAC_MR1_BASE(emac_opb_mhz()) | EMAC_MR1_VLE | EMAC_MR1_IST;
- if (dev->phy.duplex == DUPLEX_FULL)
- r |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
- dev->stop_timeout = STOP_TIMEOUT_10;
- switch (dev->phy.speed) {
- case SPEED_1000:
- if (emac_phy_gpcs(dev->phy.mode)) {
- r |= EMAC_MR1_MF_1000GPCS |
- EMAC_MR1_MF_IPPA(dev->phy.address);
-
- /* Put some arbitrary OUI, Manuf & Rev IDs so we can
- * identify this GPCS PHY later.
- */
- out_be32(&p->ipcr, 0xdeadbeef);
- } else
- r |= EMAC_MR1_MF_1000;
- r |= EMAC_MR1_RFS_16K;
- gige = 1;
-
- if (dev->ndev->mtu > ETH_DATA_LEN) {
- r |= EMAC_MR1_JPSM;
- dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
- } else
- dev->stop_timeout = STOP_TIMEOUT_1000;
- break;
- case SPEED_100:
- r |= EMAC_MR1_MF_100;
- dev->stop_timeout = STOP_TIMEOUT_100;
- /* Fall through */
- default:
- r |= EMAC_MR1_RFS_4K;
- gige = 0;
- break;
- }
-
- if (dev->rgmii_dev)
- rgmii_set_speed(dev->rgmii_dev, dev->rgmii_input,
- dev->phy.speed);
- else
- zmii_set_speed(dev->zmii_dev, dev->zmii_input, dev->phy.speed);
-
-#if !defined(CONFIG_40x)
- /* on 40x erratum forces us to NOT use integrated flow control,
- * let's hope it works on 44x ;)
- */
- if (dev->phy.duplex == DUPLEX_FULL) {
- if (dev->phy.pause)
- r |= EMAC_MR1_EIFC | EMAC_MR1_APP;
- else if (dev->phy.asym_pause)
- r |= EMAC_MR1_APP;
- }
-#endif
- out_be32(&p->mr1, r);
-
- /* Set individual MAC address */
- out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
- out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
- (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
- ndev->dev_addr[5]);
-
- /* VLAN Tag Protocol ID */
- out_be32(&p->vtpid, 0x8100);
-
- /* Receive mode register */
- r = emac_iff2rmr(ndev);
- if (r & EMAC_RMR_MAE)
- emac_hash_mc(dev);
- out_be32(&p->rmr, r);
-
- /* FIFOs thresholds */
- r = EMAC_TMR1((EMAC_MAL_BURST_SIZE / EMAC_FIFO_ENTRY_SIZE) + 1,
- EMAC_TX_FIFO_SIZE / 2 / EMAC_FIFO_ENTRY_SIZE);
- out_be32(&p->tmr1, r);
- out_be32(&p->trtr, EMAC_TRTR(EMAC_TX_FIFO_SIZE / 2));
-
- /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
- there should be still enough space in FIFO to allow the our link
- partner time to process this frame and also time to send PAUSE
- frame itself.
-
- Here is the worst case scenario for the RX FIFO "headroom"
- (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
-
- 1) One maximum-length frame on TX 1522 bytes
- 2) One PAUSE frame time 64 bytes
- 3) PAUSE frame decode time allowance 64 bytes
- 4) One maximum-length frame on RX 1522 bytes
- 5) Round-trip propagation delay of the link (100Mb) 15 bytes
- ----------
- 3187 bytes
-
- I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
- low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
- */
- r = EMAC_RWMR(EMAC_RX_FIFO_SIZE(gige) / 8 / EMAC_FIFO_ENTRY_SIZE,
- EMAC_RX_FIFO_SIZE(gige) / 4 / EMAC_FIFO_ENTRY_SIZE);
- out_be32(&p->rwmr, r);
-
- /* Set PAUSE timer to the maximum */
- out_be32(&p->ptr, 0xffff);
-
- /* IRQ sources */
- out_be32(&p->iser, EMAC_ISR_TXPE | EMAC_ISR_RXPE | /* EMAC_ISR_TXUE |
- EMAC_ISR_RXOE | */ EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
- EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
- EMAC_ISR_IRE | EMAC_ISR_TE);
-
- /* We need to take GPCS PHY out of isolate mode after EMAC reset */
- if (emac_phy_gpcs(dev->phy.mode))
- mii_reset_phy(&dev->phy);
-
- return 0;
-}
-
-/* BHs disabled */
-static void emac_reinitialize(struct ocp_enet_private *dev)
-{
- DBG("%d: reinitialize" NL, dev->def->index);
-
- if (!emac_configure(dev)) {
- emac_tx_enable(dev);
- emac_rx_enable(dev);
- }
-}
-
-/* BHs disabled */
-static void emac_full_tx_reset(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- struct ocp_func_emac_data *emacdata = dev->def->additions;
-
- DBG("%d: full_tx_reset" NL, dev->def->index);
-
- emac_tx_disable(dev);
- mal_disable_tx_channel(dev->mal, emacdata->mal_tx_chan);
- emac_clean_tx_ring(dev);
- dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
-
- emac_configure(dev);
-
- mal_enable_tx_channel(dev->mal, emacdata->mal_tx_chan);
- emac_tx_enable(dev);
- emac_rx_enable(dev);
-
- netif_wake_queue(ndev);
-}
-
-static int __emac_mdio_read(struct ocp_enet_private *dev, u8 id, u8 reg)
-{
- struct emac_regs __iomem *p = dev->emacp;
- u32 r;
- int n;
-
- DBG2("%d: mdio_read(%02x,%02x)" NL, dev->def->index, id, reg);
-
- /* Enable proper MDIO port */
- zmii_enable_mdio(dev->zmii_dev, dev->zmii_input);
-
- /* Wait for management interface to become idle */
- n = 10;
- while (!emac_phy_done(in_be32(&p->stacr))) {
- udelay(1);
- if (!--n)
- goto to;
- }
-
- /* Issue read command */
- out_be32(&p->stacr,
- EMAC_STACR_BASE(emac_opb_mhz()) | EMAC_STACR_STAC_READ |
- (reg & EMAC_STACR_PRA_MASK)
- | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT)
- | EMAC_STACR_START);
-
- /* Wait for read to complete */
- n = 100;
- while (!emac_phy_done(r = in_be32(&p->stacr))) {
- udelay(1);
- if (!--n)
- goto to;
- }
-
- if (unlikely(r & EMAC_STACR_PHYE)) {
- DBG("%d: mdio_read(%02x, %02x) failed" NL, dev->def->index,
- id, reg);
- return -EREMOTEIO;
- }
-
- r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
- DBG2("%d: mdio_read -> %04x" NL, dev->def->index, r);
- return r;
- to:
- DBG("%d: MII management interface timeout (read)" NL, dev->def->index);
- return -ETIMEDOUT;
-}
-
-static void __emac_mdio_write(struct ocp_enet_private *dev, u8 id, u8 reg,
- u16 val)
-{
- struct emac_regs __iomem *p = dev->emacp;
- int n;
-
- DBG2("%d: mdio_write(%02x,%02x,%04x)" NL, dev->def->index, id, reg,
- val);
-
- /* Enable proper MDIO port */
- zmii_enable_mdio(dev->zmii_dev, dev->zmii_input);
-
- /* Wait for management interface to be idle */
- n = 10;
- while (!emac_phy_done(in_be32(&p->stacr))) {
- udelay(1);
- if (!--n)
- goto to;
- }
-
- /* Issue write command */
- out_be32(&p->stacr,
- EMAC_STACR_BASE(emac_opb_mhz()) | EMAC_STACR_STAC_WRITE |
- (reg & EMAC_STACR_PRA_MASK) |
- ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
- (val << EMAC_STACR_PHYD_SHIFT) | EMAC_STACR_START);
-
- /* Wait for write to complete */
- n = 100;
- while (!emac_phy_done(in_be32(&p->stacr))) {
- udelay(1);
- if (!--n)
- goto to;
- }
- return;
- to:
- DBG("%d: MII management interface timeout (write)" NL, dev->def->index);
-}
-
-static int emac_mdio_read(struct net_device *ndev, int id, int reg)
-{
- struct ocp_enet_private *dev = ndev->priv;
- int res;
-
- local_bh_disable();
- res = __emac_mdio_read(dev->mdio_dev ? dev->mdio_dev : dev, (u8) id,
- (u8) reg);
- local_bh_enable();
- return res;
-}
-
-static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
-{
- struct ocp_enet_private *dev = ndev->priv;
-
- local_bh_disable();
- __emac_mdio_write(dev->mdio_dev ? dev->mdio_dev : dev, (u8) id,
- (u8) reg, (u16) val);
- local_bh_enable();
-}
-
-/* BHs disabled */
-static void emac_set_multicast_list(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- struct emac_regs __iomem *p = dev->emacp;
- u32 rmr = emac_iff2rmr(ndev);
-
- DBG("%d: multicast %08x" NL, dev->def->index, rmr);
- BUG_ON(!netif_running(dev->ndev));
-
- /* I decided to relax register access rules here to avoid
- * full EMAC reset.
- *
- * There is a real problem with EMAC4 core if we use MWSW_001 bit
- * in MR1 register and do a full EMAC reset.
- * One TX BD status update is delayed and, after EMAC reset, it
- * never happens, resulting in TX hung (it'll be recovered by TX
- * timeout handler eventually, but this is just gross).
- * So we either have to do full TX reset or try to cheat here :)
- *
- * The only required change is to RX mode register, so I *think* all
- * we need is just to stop RX channel. This seems to work on all
- * tested SoCs. --ebs
- */
- emac_rx_disable(dev);
- if (rmr & EMAC_RMR_MAE)
- emac_hash_mc(dev);
- out_be32(&p->rmr, rmr);
- emac_rx_enable(dev);
-}
-
-/* BHs disabled */
-static int emac_resize_rx_ring(struct ocp_enet_private *dev, int new_mtu)
-{
- struct ocp_func_emac_data *emacdata = dev->def->additions;
- int rx_sync_size = emac_rx_sync_size(new_mtu);
- int rx_skb_size = emac_rx_skb_size(new_mtu);
- int i, ret = 0;
-
- emac_rx_disable(dev);
- mal_disable_rx_channel(dev->mal, emacdata->mal_rx_chan);
-
- if (dev->rx_sg_skb) {
- ++dev->estats.rx_dropped_resize;
- dev_kfree_skb(dev->rx_sg_skb);
- dev->rx_sg_skb = NULL;
- }
-
- /* Make a first pass over RX ring and mark BDs ready, dropping
- * non-processed packets on the way. We need this as a separate pass
- * to simplify error recovery in the case of allocation failure later.
- */
- for (i = 0; i < NUM_RX_BUFF; ++i) {
- if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
- ++dev->estats.rx_dropped_resize;
-
- dev->rx_desc[i].data_len = 0;
- dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
- (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
- }
-
- /* Reallocate RX ring only if bigger skb buffers are required */
- if (rx_skb_size <= dev->rx_skb_size)
- goto skip;
-
- /* Second pass, allocate new skbs */
- for (i = 0; i < NUM_RX_BUFF; ++i) {
- struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
- if (!skb) {
- ret = -ENOMEM;
- goto oom;
- }
-
- BUG_ON(!dev->rx_skb[i]);
- dev_kfree_skb(dev->rx_skb[i]);
-
- skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
- dev->rx_desc[i].data_ptr =
- dma_map_single(dev->ldev, skb->data - 2, rx_sync_size,
- DMA_FROM_DEVICE) + 2;
- dev->rx_skb[i] = skb;
- }
- skip:
- /* Check if we need to change "Jumbo" bit in MR1 */
- if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) {
- /* This is to prevent starting RX channel in emac_rx_enable() */
- dev->commac.rx_stopped = 1;
-
- dev->ndev->mtu = new_mtu;
- emac_full_tx_reset(dev->ndev);
- }
-
- mal_set_rcbs(dev->mal, emacdata->mal_rx_chan, emac_rx_size(new_mtu));
- oom:
- /* Restart RX */
- dev->commac.rx_stopped = dev->rx_slot = 0;
- mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan);
- emac_rx_enable(dev);
-
- return ret;
-}
-
-/* Process ctx, rtnl_lock semaphore */
-static int emac_change_mtu(struct net_device *ndev, int new_mtu)
-{
- struct ocp_enet_private *dev = ndev->priv;
- int ret = 0;
-
- if (new_mtu < EMAC_MIN_MTU || new_mtu > EMAC_MAX_MTU)
- return -EINVAL;
-
- DBG("%d: change_mtu(%d)" NL, dev->def->index, new_mtu);
-
- local_bh_disable();
- if (netif_running(ndev)) {
- /* Check if we really need to reinitalize RX ring */
- if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
- ret = emac_resize_rx_ring(dev, new_mtu);
- }
-
- if (!ret) {
- ndev->mtu = new_mtu;
- dev->rx_skb_size = emac_rx_skb_size(new_mtu);
- dev->rx_sync_size = emac_rx_sync_size(new_mtu);
- }
- local_bh_enable();
-
- return ret;
-}
-
-static void emac_clean_tx_ring(struct ocp_enet_private *dev)
-{
- int i;
- for (i = 0; i < NUM_TX_BUFF; ++i) {
- if (dev->tx_skb[i]) {
- dev_kfree_skb(dev->tx_skb[i]);
- dev->tx_skb[i] = NULL;
- if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
- ++dev->estats.tx_dropped;
- }
- dev->tx_desc[i].ctrl = 0;
- dev->tx_desc[i].data_ptr = 0;
- }
-}
-
-static void emac_clean_rx_ring(struct ocp_enet_private *dev)
-{
- int i;
- for (i = 0; i < NUM_RX_BUFF; ++i)
- if (dev->rx_skb[i]) {
- dev->rx_desc[i].ctrl = 0;
- dev_kfree_skb(dev->rx_skb[i]);
- dev->rx_skb[i] = NULL;
- dev->rx_desc[i].data_ptr = 0;
- }
-
- if (dev->rx_sg_skb) {
- dev_kfree_skb(dev->rx_sg_skb);
- dev->rx_sg_skb = NULL;
- }
-}
-
-static inline int emac_alloc_rx_skb(struct ocp_enet_private *dev, int slot,
- gfp_t flags)
-{
- struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
- if (unlikely(!skb))
- return -ENOMEM;
-
- dev->rx_skb[slot] = skb;
- dev->rx_desc[slot].data_len = 0;
-
- skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
- dev->rx_desc[slot].data_ptr =
- dma_map_single(dev->ldev, skb->data - 2, dev->rx_sync_size,
- DMA_FROM_DEVICE) + 2;
- barrier();
- dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
- (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
-
- return 0;
-}
-
-static void emac_print_link_status(struct ocp_enet_private *dev)
-{
- if (netif_carrier_ok(dev->ndev))
- printk(KERN_INFO "%s: link is up, %d %s%s\n",
- dev->ndev->name, dev->phy.speed,
- dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
- dev->phy.pause ? ", pause enabled" :
- dev->phy.asym_pause ? ", assymetric pause enabled" : "");
- else
- printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
-}
-
-/* Process ctx, rtnl_lock semaphore */
-static int emac_open(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- struct ocp_func_emac_data *emacdata = dev->def->additions;
- int err, i;
-
- DBG("%d: open" NL, dev->def->index);
-
- /* Setup error IRQ handler */
- err = request_irq(dev->def->irq, emac_irq, 0, "EMAC", dev);
- if (err) {
- printk(KERN_ERR "%s: failed to request IRQ %d\n",
- ndev->name, dev->def->irq);
- return err;
- }
-
- /* Allocate RX ring */
- for (i = 0; i < NUM_RX_BUFF; ++i)
- if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
- printk(KERN_ERR "%s: failed to allocate RX ring\n",
- ndev->name);
- goto oom;
- }
-
- local_bh_disable();
- dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot =
- dev->commac.rx_stopped = 0;
- dev->rx_sg_skb = NULL;
-
- if (dev->phy.address >= 0) {
- int link_poll_interval;
- if (dev->phy.def->ops->poll_link(&dev->phy)) {
- dev->phy.def->ops->read_link(&dev->phy);
- EMAC_RX_CLK_DEFAULT(dev->def->index);
- netif_carrier_on(dev->ndev);
- link_poll_interval = PHY_POLL_LINK_ON;
- } else {
- EMAC_RX_CLK_TX(dev->def->index);
- netif_carrier_off(dev->ndev);
- link_poll_interval = PHY_POLL_LINK_OFF;
- }
- mod_timer(&dev->link_timer, jiffies + link_poll_interval);
- emac_print_link_status(dev);
- } else
- netif_carrier_on(dev->ndev);
-
- emac_configure(dev);
- mal_poll_add(dev->mal, &dev->commac);
- mal_enable_tx_channel(dev->mal, emacdata->mal_tx_chan);
- mal_set_rcbs(dev->mal, emacdata->mal_rx_chan, emac_rx_size(ndev->mtu));
- mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan);
- emac_tx_enable(dev);
- emac_rx_enable(dev);
- netif_start_queue(ndev);
- local_bh_enable();
-
- return 0;
- oom:
- emac_clean_rx_ring(dev);
- free_irq(dev->def->irq, dev);
- return -ENOMEM;
-}
-
-/* BHs disabled */
-static int emac_link_differs(struct ocp_enet_private *dev)
-{
- u32 r = in_be32(&dev->emacp->mr1);
-
- int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
- int speed, pause, asym_pause;
-
- if (r & EMAC_MR1_MF_1000)
- speed = SPEED_1000;
- else if (r & EMAC_MR1_MF_100)
- speed = SPEED_100;
- else
- speed = SPEED_10;
-
- switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
- case (EMAC_MR1_EIFC | EMAC_MR1_APP):
- pause = 1;
- asym_pause = 0;
- break;
- case EMAC_MR1_APP:
- pause = 0;
- asym_pause = 1;
- break;
- default:
- pause = asym_pause = 0;
- }
- return speed != dev->phy.speed || duplex != dev->phy.duplex ||
- pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
-}
-
-/* BHs disabled */
-static void emac_link_timer(unsigned long data)
-{
- struct ocp_enet_private *dev = (struct ocp_enet_private *)data;
- int link_poll_interval;
-
- DBG2("%d: link timer" NL, dev->def->index);
-
- if (dev->phy.def->ops->poll_link(&dev->phy)) {
- if (!netif_carrier_ok(dev->ndev)) {
- EMAC_RX_CLK_DEFAULT(dev->def->index);
-
- /* Get new link parameters */
- dev->phy.def->ops->read_link(&dev->phy);
-
- if (dev->tah_dev || emac_link_differs(dev))
- emac_full_tx_reset(dev->ndev);
-
- netif_carrier_on(dev->ndev);
- emac_print_link_status(dev);
- }
- link_poll_interval = PHY_POLL_LINK_ON;
- } else {
- if (netif_carrier_ok(dev->ndev)) {
- EMAC_RX_CLK_TX(dev->def->index);
-#if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX)
- emac_reinitialize(dev);
-#endif
- netif_carrier_off(dev->ndev);
- emac_print_link_status(dev);
- }
-
- /* Retry reset if the previous attempt failed.
- * This is needed mostly for CONFIG_IBM_EMAC_PHY_RX_CLK_FIX
- * case, but I left it here because it shouldn't trigger for
- * sane PHYs anyway.
- */
- if (unlikely(dev->reset_failed))
- emac_reinitialize(dev);
-
- link_poll_interval = PHY_POLL_LINK_OFF;
- }
- mod_timer(&dev->link_timer, jiffies + link_poll_interval);
-}
-
-/* BHs disabled */
-static void emac_force_link_update(struct ocp_enet_private *dev)
-{
- netif_carrier_off(dev->ndev);
- if (timer_pending(&dev->link_timer))
- mod_timer(&dev->link_timer, jiffies + PHY_POLL_LINK_OFF);
-}
-
-/* Process ctx, rtnl_lock semaphore */
-static int emac_close(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- struct ocp_func_emac_data *emacdata = dev->def->additions;
-
- DBG("%d: close" NL, dev->def->index);
-
- local_bh_disable();
-
- if (dev->phy.address >= 0)
- del_timer_sync(&dev->link_timer);
-
- netif_stop_queue(ndev);
- emac_rx_disable(dev);
- emac_tx_disable(dev);
- mal_disable_rx_channel(dev->mal, emacdata->mal_rx_chan);
- mal_disable_tx_channel(dev->mal, emacdata->mal_tx_chan);
- mal_poll_del(dev->mal, &dev->commac);
- local_bh_enable();
-
- emac_clean_tx_ring(dev);
- emac_clean_rx_ring(dev);
- free_irq(dev->def->irq, dev);
-
- return 0;
-}
-
-static inline u16 emac_tx_csum(struct ocp_enet_private *dev,
- struct sk_buff *skb)
-{
-#if defined(CONFIG_IBM_EMAC_TAH)
- if (skb->ip_summed == CHECKSUM_PARTIAL) {
- ++dev->stats.tx_packets_csum;
- return EMAC_TX_CTRL_TAH_CSUM;
- }
-#endif
- return 0;
-}
-
-static inline int emac_xmit_finish(struct ocp_enet_private *dev, int len)
-{
- struct emac_regs __iomem *p = dev->emacp;
- struct net_device *ndev = dev->ndev;
-
- /* Send the packet out */
- out_be32(&p->tmr0, EMAC_TMR0_XMIT);
-
- if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
- netif_stop_queue(ndev);
- DBG2("%d: stopped TX queue" NL, dev->def->index);
- }
-
- ndev->trans_start = jiffies;
- ++dev->stats.tx_packets;
- dev->stats.tx_bytes += len;
-
- return 0;
-}
-
-/* BHs disabled */
-static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- unsigned int len = skb->len;
- int slot;
-
- u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
- MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
-
- slot = dev->tx_slot++;
- if (dev->tx_slot == NUM_TX_BUFF) {
- dev->tx_slot = 0;
- ctrl |= MAL_TX_CTRL_WRAP;
- }
-
- DBG2("%d: xmit(%u) %d" NL, dev->def->index, len, slot);
-
- dev->tx_skb[slot] = skb;
- dev->tx_desc[slot].data_ptr = dma_map_single(dev->ldev, skb->data, len,
- DMA_TO_DEVICE);
- dev->tx_desc[slot].data_len = (u16) len;
- barrier();
- dev->tx_desc[slot].ctrl = ctrl;
-
- return emac_xmit_finish(dev, len);
-}
-
-#if defined(CONFIG_IBM_EMAC_TAH)
-static inline int emac_xmit_split(struct ocp_enet_private *dev, int slot,
- u32 pd, int len, int last, u16 base_ctrl)
-{
- while (1) {
- u16 ctrl = base_ctrl;
- int chunk = min(len, MAL_MAX_TX_SIZE);
- len -= chunk;
-
- slot = (slot + 1) % NUM_TX_BUFF;
-
- if (last && !len)
- ctrl |= MAL_TX_CTRL_LAST;
- if (slot == NUM_TX_BUFF - 1)
- ctrl |= MAL_TX_CTRL_WRAP;
-
- dev->tx_skb[slot] = NULL;
- dev->tx_desc[slot].data_ptr = pd;
- dev->tx_desc[slot].data_len = (u16) chunk;
- dev->tx_desc[slot].ctrl = ctrl;
- ++dev->tx_cnt;
-
- if (!len)
- break;
-
- pd += chunk;
- }
- return slot;
-}
-
-/* BHs disabled (SG version for TAH equipped EMACs) */
-static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- int nr_frags = skb_shinfo(skb)->nr_frags;
- int len = skb->len, chunk;
- int slot, i;
- u16 ctrl;
- u32 pd;
-
- /* This is common "fast" path */
- if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
- return emac_start_xmit(skb, ndev);
-
- len -= skb->data_len;
-
- /* Note, this is only an *estimation*, we can still run out of empty
- * slots because of the additional fragmentation into
- * MAL_MAX_TX_SIZE-sized chunks
- */
- if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
- goto stop_queue;
-
- ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
- emac_tx_csum(dev, skb);
- slot = dev->tx_slot;
-
- /* skb data */
- dev->tx_skb[slot] = NULL;
- chunk = min(len, MAL_MAX_TX_SIZE);
- dev->tx_desc[slot].data_ptr = pd =
- dma_map_single(dev->ldev, skb->data, len, DMA_TO_DEVICE);
- dev->tx_desc[slot].data_len = (u16) chunk;
- len -= chunk;
- if (unlikely(len))
- slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
- ctrl);
- /* skb fragments */
- for (i = 0; i < nr_frags; ++i) {
- struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
- len = frag->size;
-
- if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
- goto undo_frame;
-
- pd = dma_map_page(dev->ldev, frag->page, frag->page_offset, len,
- DMA_TO_DEVICE);
-
- slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
- ctrl);
- }
-
- DBG2("%d: xmit_sg(%u) %d - %d" NL, dev->def->index, skb->len,
- dev->tx_slot, slot);
-
- /* Attach skb to the last slot so we don't release it too early */
- dev->tx_skb[slot] = skb;
-
- /* Send the packet out */
- if (dev->tx_slot == NUM_TX_BUFF - 1)
- ctrl |= MAL_TX_CTRL_WRAP;
- barrier();
- dev->tx_desc[dev->tx_slot].ctrl = ctrl;
- dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
-
- return emac_xmit_finish(dev, skb->len);
-
- undo_frame:
- /* Well, too bad. Our previous estimation was overly optimistic.
- * Undo everything.
- */
- while (slot != dev->tx_slot) {
- dev->tx_desc[slot].ctrl = 0;
- --dev->tx_cnt;
- if (--slot < 0)
- slot = NUM_TX_BUFF - 1;
- }
- ++dev->estats.tx_undo;
-
- stop_queue:
- netif_stop_queue(ndev);
- DBG2("%d: stopped TX queue" NL, dev->def->index);
- return 1;
-}
-#else
-# define emac_start_xmit_sg emac_start_xmit
-#endif /* !defined(CONFIG_IBM_EMAC_TAH) */
-
-/* BHs disabled */
-static void emac_parse_tx_error(struct ocp_enet_private *dev, u16 ctrl)
-{
- struct ibm_emac_error_stats *st = &dev->estats;
- DBG("%d: BD TX error %04x" NL, dev->def->index, ctrl);
-
- ++st->tx_bd_errors;
- if (ctrl & EMAC_TX_ST_BFCS)
- ++st->tx_bd_bad_fcs;
- if (ctrl & EMAC_TX_ST_LCS)
- ++st->tx_bd_carrier_loss;
- if (ctrl & EMAC_TX_ST_ED)
- ++st->tx_bd_excessive_deferral;
- if (ctrl & EMAC_TX_ST_EC)
- ++st->tx_bd_excessive_collisions;
- if (ctrl & EMAC_TX_ST_LC)
- ++st->tx_bd_late_collision;
- if (ctrl & EMAC_TX_ST_MC)
- ++st->tx_bd_multple_collisions;
- if (ctrl & EMAC_TX_ST_SC)
- ++st->tx_bd_single_collision;
- if (ctrl & EMAC_TX_ST_UR)
- ++st->tx_bd_underrun;
- if (ctrl & EMAC_TX_ST_SQE)
- ++st->tx_bd_sqe;
-}
-
-static void emac_poll_tx(void *param)
-{
- struct ocp_enet_private *dev = param;
- DBG2("%d: poll_tx, %d %d" NL, dev->def->index, dev->tx_cnt,
- dev->ack_slot);
-
- if (dev->tx_cnt) {
- u16 ctrl;
- int slot = dev->ack_slot, n = 0;
- again:
- ctrl = dev->tx_desc[slot].ctrl;
- if (!(ctrl & MAL_TX_CTRL_READY)) {
- struct sk_buff *skb = dev->tx_skb[slot];
- ++n;
-
- if (skb) {
- dev_kfree_skb(skb);
- dev->tx_skb[slot] = NULL;
- }
- slot = (slot + 1) % NUM_TX_BUFF;
-
- if (unlikely(EMAC_IS_BAD_TX(ctrl)))
- emac_parse_tx_error(dev, ctrl);
-
- if (--dev->tx_cnt)
- goto again;
- }
- if (n) {
- dev->ack_slot = slot;
- if (netif_queue_stopped(dev->ndev) &&
- dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
- netif_wake_queue(dev->ndev);
-
- DBG2("%d: tx %d pkts" NL, dev->def->index, n);
- }
- }
-}
-
-static inline void emac_recycle_rx_skb(struct ocp_enet_private *dev, int slot,
- int len)
-{
- struct sk_buff *skb = dev->rx_skb[slot];
- DBG2("%d: recycle %d %d" NL, dev->def->index, slot, len);
-
- if (len)
- dma_map_single(dev->ldev, skb->data - 2,
- EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
-
- dev->rx_desc[slot].data_len = 0;
- barrier();
- dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
- (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
-}
-
-static void emac_parse_rx_error(struct ocp_enet_private *dev, u16 ctrl)
-{
- struct ibm_emac_error_stats *st = &dev->estats;
- DBG("%d: BD RX error %04x" NL, dev->def->index, ctrl);
-
- ++st->rx_bd_errors;
- if (ctrl & EMAC_RX_ST_OE)
- ++st->rx_bd_overrun;
- if (ctrl & EMAC_RX_ST_BP)
- ++st->rx_bd_bad_packet;
- if (ctrl & EMAC_RX_ST_RP)
- ++st->rx_bd_runt_packet;
- if (ctrl & EMAC_RX_ST_SE)
- ++st->rx_bd_short_event;
- if (ctrl & EMAC_RX_ST_AE)
- ++st->rx_bd_alignment_error;
- if (ctrl & EMAC_RX_ST_BFCS)
- ++st->rx_bd_bad_fcs;
- if (ctrl & EMAC_RX_ST_PTL)
- ++st->rx_bd_packet_too_long;
- if (ctrl & EMAC_RX_ST_ORE)
- ++st->rx_bd_out_of_range;
- if (ctrl & EMAC_RX_ST_IRE)
- ++st->rx_bd_in_range;
-}
-
-static inline void emac_rx_csum(struct ocp_enet_private *dev,
- struct sk_buff *skb, u16 ctrl)
-{
-#if defined(CONFIG_IBM_EMAC_TAH)
- if (!ctrl && dev->tah_dev) {
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- ++dev->stats.rx_packets_csum;
- }
-#endif
-}
-
-static inline int emac_rx_sg_append(struct ocp_enet_private *dev, int slot)
-{
- if (likely(dev->rx_sg_skb != NULL)) {
- int len = dev->rx_desc[slot].data_len;
- int tot_len = dev->rx_sg_skb->len + len;
-
- if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
- ++dev->estats.rx_dropped_mtu;
- dev_kfree_skb(dev->rx_sg_skb);
- dev->rx_sg_skb = NULL;
- } else {
- cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb),
- dev->rx_skb[slot]->data, len);
- skb_put(dev->rx_sg_skb, len);
- emac_recycle_rx_skb(dev, slot, len);
- return 0;
- }
- }
- emac_recycle_rx_skb(dev, slot, 0);
- return -1;
-}
-
-/* BHs disabled */
-static int emac_poll_rx(void *param, int budget)
-{
- struct ocp_enet_private *dev = param;
- int slot = dev->rx_slot, received = 0;
-
- DBG2("%d: poll_rx(%d)" NL, dev->def->index, budget);
-
- again:
- while (budget > 0) {
- int len;
- struct sk_buff *skb;
- u16 ctrl = dev->rx_desc[slot].ctrl;
-
- if (ctrl & MAL_RX_CTRL_EMPTY)
- break;
-
- skb = dev->rx_skb[slot];
- barrier();
- len = dev->rx_desc[slot].data_len;
-
- if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
- goto sg;
-
- ctrl &= EMAC_BAD_RX_MASK;
- if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
- emac_parse_rx_error(dev, ctrl);
- ++dev->estats.rx_dropped_error;
- emac_recycle_rx_skb(dev, slot, 0);
- len = 0;
- goto next;
- }
-
- if (len && len < EMAC_RX_COPY_THRESH) {
- struct sk_buff *copy_skb =
- alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
- if (unlikely(!copy_skb))
- goto oom;
-
- skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
- cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
- len + 2);
- emac_recycle_rx_skb(dev, slot, len);
- skb = copy_skb;
- } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
- goto oom;
-
- skb_put(skb, len);
- push_packet:
- skb->protocol = eth_type_trans(skb, dev->ndev);
- emac_rx_csum(dev, skb, ctrl);
-
- if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
- ++dev->estats.rx_dropped_stack;
- next:
- ++dev->stats.rx_packets;
- skip:
- dev->stats.rx_bytes += len;
- slot = (slot + 1) % NUM_RX_BUFF;
- --budget;
- ++received;
- continue;
- sg:
- if (ctrl & MAL_RX_CTRL_FIRST) {
- BUG_ON(dev->rx_sg_skb);
- if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
- DBG("%d: rx OOM %d" NL, dev->def->index, slot);
- ++dev->estats.rx_dropped_oom;
- emac_recycle_rx_skb(dev, slot, 0);
- } else {
- dev->rx_sg_skb = skb;
- skb_put(skb, len);
- }
- } else if (!emac_rx_sg_append(dev, slot) &&
- (ctrl & MAL_RX_CTRL_LAST)) {
-
- skb = dev->rx_sg_skb;
- dev->rx_sg_skb = NULL;
-
- ctrl &= EMAC_BAD_RX_MASK;
- if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
- emac_parse_rx_error(dev, ctrl);
- ++dev->estats.rx_dropped_error;
- dev_kfree_skb(skb);
- len = 0;
- } else
- goto push_packet;
- }
- goto skip;
- oom:
- DBG("%d: rx OOM %d" NL, dev->def->index, slot);
- /* Drop the packet and recycle skb */
- ++dev->estats.rx_dropped_oom;
- emac_recycle_rx_skb(dev, slot, 0);
- goto next;
- }
-
- if (received) {
- DBG2("%d: rx %d BDs" NL, dev->def->index, received);
- dev->rx_slot = slot;
- }
-
- if (unlikely(budget && dev->commac.rx_stopped)) {
- struct ocp_func_emac_data *emacdata = dev->def->additions;
-
- barrier();
- if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
- DBG2("%d: rx restart" NL, dev->def->index);
- received = 0;
- goto again;
- }
-
- if (dev->rx_sg_skb) {
- DBG2("%d: dropping partial rx packet" NL,
- dev->def->index);
- ++dev->estats.rx_dropped_error;
- dev_kfree_skb(dev->rx_sg_skb);
- dev->rx_sg_skb = NULL;
- }
-
- dev->commac.rx_stopped = 0;
- mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan);
- emac_rx_enable(dev);
- dev->rx_slot = 0;
- }
- return received;
-}
-
-/* BHs disabled */
-static int emac_peek_rx(void *param)
-{
- struct ocp_enet_private *dev = param;
- return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
-}
-
-/* BHs disabled */
-static int emac_peek_rx_sg(void *param)
-{
- struct ocp_enet_private *dev = param;
- int slot = dev->rx_slot;
- while (1) {
- u16 ctrl = dev->rx_desc[slot].ctrl;
- if (ctrl & MAL_RX_CTRL_EMPTY)
- return 0;
- else if (ctrl & MAL_RX_CTRL_LAST)
- return 1;
-
- slot = (slot + 1) % NUM_RX_BUFF;
-
- /* I'm just being paranoid here :) */
- if (unlikely(slot == dev->rx_slot))
- return 0;
- }
-}
-
-/* Hard IRQ */
-static void emac_rxde(void *param)
-{
- struct ocp_enet_private *dev = param;
- ++dev->estats.rx_stopped;
- emac_rx_disable_async(dev);
-}
-
-/* Hard IRQ */
-static irqreturn_t emac_irq(int irq, void *dev_instance)
-{
- struct ocp_enet_private *dev = dev_instance;
- struct emac_regs __iomem *p = dev->emacp;
- struct ibm_emac_error_stats *st = &dev->estats;
-
- u32 isr = in_be32(&p->isr);
- out_be32(&p->isr, isr);
-
- DBG("%d: isr = %08x" NL, dev->def->index, isr);
-
- if (isr & EMAC_ISR_TXPE)
- ++st->tx_parity;
- if (isr & EMAC_ISR_RXPE)
- ++st->rx_parity;
- if (isr & EMAC_ISR_TXUE)
- ++st->tx_underrun;
- if (isr & EMAC_ISR_RXOE)
- ++st->rx_fifo_overrun;
- if (isr & EMAC_ISR_OVR)
- ++st->rx_overrun;
- if (isr & EMAC_ISR_BP)
- ++st->rx_bad_packet;
- if (isr & EMAC_ISR_RP)
- ++st->rx_runt_packet;
- if (isr & EMAC_ISR_SE)
- ++st->rx_short_event;
- if (isr & EMAC_ISR_ALE)
- ++st->rx_alignment_error;
- if (isr & EMAC_ISR_BFCS)
- ++st->rx_bad_fcs;
- if (isr & EMAC_ISR_PTLE)
- ++st->rx_packet_too_long;
- if (isr & EMAC_ISR_ORE)
- ++st->rx_out_of_range;
- if (isr & EMAC_ISR_IRE)
- ++st->rx_in_range;
- if (isr & EMAC_ISR_SQE)
- ++st->tx_sqe;
- if (isr & EMAC_ISR_TE)
- ++st->tx_errors;
-
- return IRQ_HANDLED;
-}
-
-static struct net_device_stats *emac_stats(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- struct ibm_emac_stats *st = &dev->stats;
- struct ibm_emac_error_stats *est = &dev->estats;
- struct net_device_stats *nst = &dev->nstats;
-
- DBG2("%d: stats" NL, dev->def->index);
-
- /* Compute "legacy" statistics */
- local_irq_disable();
- nst->rx_packets = (unsigned long)st->rx_packets;
- nst->rx_bytes = (unsigned long)st->rx_bytes;
- nst->tx_packets = (unsigned long)st->tx_packets;
- nst->tx_bytes = (unsigned long)st->tx_bytes;
- nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
- est->rx_dropped_error +
- est->rx_dropped_resize +
- est->rx_dropped_mtu);
- nst->tx_dropped = (unsigned long)est->tx_dropped;
-
- nst->rx_errors = (unsigned long)est->rx_bd_errors;
- nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
- est->rx_fifo_overrun +
- est->rx_overrun);
- nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
- est->rx_alignment_error);
- nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
- est->rx_bad_fcs);
- nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
- est->rx_bd_short_event +
- est->rx_bd_packet_too_long +
- est->rx_bd_out_of_range +
- est->rx_bd_in_range +
- est->rx_runt_packet +
- est->rx_short_event +
- est->rx_packet_too_long +
- est->rx_out_of_range +
- est->rx_in_range);
-
- nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
- nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
- est->tx_underrun);
- nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
- nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
- est->tx_bd_excessive_collisions +
- est->tx_bd_late_collision +
- est->tx_bd_multple_collisions);
- local_irq_enable();
- return nst;
-}
-
-static void emac_remove(struct ocp_device *ocpdev)
-{
- struct ocp_enet_private *dev = ocp_get_drvdata(ocpdev);
-
- DBG("%d: remove" NL, dev->def->index);
-
- ocp_set_drvdata(ocpdev, NULL);
- unregister_netdev(dev->ndev);
-
- tah_fini(dev->tah_dev);
- rgmii_fini(dev->rgmii_dev, dev->rgmii_input);
- zmii_fini(dev->zmii_dev, dev->zmii_input);
-
- emac_dbg_register(dev->def->index, NULL);
-
- mal_unregister_commac(dev->mal, &dev->commac);
- iounmap(dev->emacp);
- kfree(dev->ndev);
-}
-
-static struct mal_commac_ops emac_commac_ops = {
- .poll_tx = &emac_poll_tx,
- .poll_rx = &emac_poll_rx,
- .peek_rx = &emac_peek_rx,
- .rxde = &emac_rxde,
-};
-
-static struct mal_commac_ops emac_commac_sg_ops = {
- .poll_tx = &emac_poll_tx,
- .poll_rx = &emac_poll_rx,
- .peek_rx = &emac_peek_rx_sg,
- .rxde = &emac_rxde,
-};
-
-/* Ethtool support */
-static int emac_ethtool_get_settings(struct net_device *ndev,
- struct ethtool_cmd *cmd)
-{
- struct ocp_enet_private *dev = ndev->priv;
-
- cmd->supported = dev->phy.features;
- cmd->port = PORT_MII;
- cmd->phy_address = dev->phy.address;
- cmd->transceiver =
- dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
-
- local_bh_disable();
- cmd->advertising = dev->phy.advertising;
- cmd->autoneg = dev->phy.autoneg;
- cmd->speed = dev->phy.speed;
- cmd->duplex = dev->phy.duplex;
- local_bh_enable();
-
- return 0;
-}
-
-static int emac_ethtool_set_settings(struct net_device *ndev,
- struct ethtool_cmd *cmd)
-{
- struct ocp_enet_private *dev = ndev->priv;
- u32 f = dev->phy.features;
-
- DBG("%d: set_settings(%d, %d, %d, 0x%08x)" NL, dev->def->index,
- cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
-
- /* Basic sanity checks */
- if (dev->phy.address < 0)
- return -EOPNOTSUPP;
- if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
- return -EINVAL;
- if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
- return -EINVAL;
- if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
- return -EINVAL;
-
- if (cmd->autoneg == AUTONEG_DISABLE) {
- switch (cmd->speed) {
- case SPEED_10:
- if (cmd->duplex == DUPLEX_HALF
- && !(f & SUPPORTED_10baseT_Half))
- return -EINVAL;
- if (cmd->duplex == DUPLEX_FULL
- && !(f & SUPPORTED_10baseT_Full))
- return -EINVAL;
- break;
- case SPEED_100:
- if (cmd->duplex == DUPLEX_HALF
- && !(f & SUPPORTED_100baseT_Half))
- return -EINVAL;
- if (cmd->duplex == DUPLEX_FULL
- && !(f & SUPPORTED_100baseT_Full))
- return -EINVAL;
- break;
- case SPEED_1000:
- if (cmd->duplex == DUPLEX_HALF
- && !(f & SUPPORTED_1000baseT_Half))
- return -EINVAL;
- if (cmd->duplex == DUPLEX_FULL
- && !(f & SUPPORTED_1000baseT_Full))
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
-
- local_bh_disable();
- dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
- cmd->duplex);
-
- } else {
- if (!(f & SUPPORTED_Autoneg))
- return -EINVAL;
-
- local_bh_disable();
- dev->phy.def->ops->setup_aneg(&dev->phy,
- (cmd->advertising & f) |
- (dev->phy.advertising &
- (ADVERTISED_Pause |
- ADVERTISED_Asym_Pause)));
- }
- emac_force_link_update(dev);
- local_bh_enable();
-
- return 0;
-}
-
-static void emac_ethtool_get_ringparam(struct net_device *ndev,
- struct ethtool_ringparam *rp)
-{
- rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
- rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
-}
-
-static void emac_ethtool_get_pauseparam(struct net_device *ndev,
- struct ethtool_pauseparam *pp)
-{
- struct ocp_enet_private *dev = ndev->priv;
-
- local_bh_disable();
- if ((dev->phy.features & SUPPORTED_Autoneg) &&
- (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
- pp->autoneg = 1;
-
- if (dev->phy.duplex == DUPLEX_FULL) {
- if (dev->phy.pause)
- pp->rx_pause = pp->tx_pause = 1;
- else if (dev->phy.asym_pause)
- pp->tx_pause = 1;
- }
- local_bh_enable();
-}
-
-static u32 emac_ethtool_get_rx_csum(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- return dev->tah_dev != 0;
-}
-
-static int emac_get_regs_len(struct ocp_enet_private *dev)
-{
- return sizeof(struct emac_ethtool_regs_subhdr) + EMAC_ETHTOOL_REGS_SIZE;
-}
-
-static int emac_ethtool_get_regs_len(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- return sizeof(struct emac_ethtool_regs_hdr) +
- emac_get_regs_len(dev) + mal_get_regs_len(dev->mal) +
- zmii_get_regs_len(dev->zmii_dev) +
- rgmii_get_regs_len(dev->rgmii_dev) +
- tah_get_regs_len(dev->tah_dev);
-}
-
-static void *emac_dump_regs(struct ocp_enet_private *dev, void *buf)
-{
- struct emac_ethtool_regs_subhdr *hdr = buf;
-
- hdr->version = EMAC_ETHTOOL_REGS_VER;
- hdr->index = dev->def->index;
- memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE);
- return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE);
-}
-
-static void emac_ethtool_get_regs(struct net_device *ndev,
- struct ethtool_regs *regs, void *buf)
-{
- struct ocp_enet_private *dev = ndev->priv;
- struct emac_ethtool_regs_hdr *hdr = buf;
-
- hdr->components = 0;
- buf = hdr + 1;
-
- local_irq_disable();
- buf = mal_dump_regs(dev->mal, buf);
- buf = emac_dump_regs(dev, buf);
- if (dev->zmii_dev) {
- hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
- buf = zmii_dump_regs(dev->zmii_dev, buf);
- }
- if (dev->rgmii_dev) {
- hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
- buf = rgmii_dump_regs(dev->rgmii_dev, buf);
- }
- if (dev->tah_dev) {
- hdr->components |= EMAC_ETHTOOL_REGS_TAH;
- buf = tah_dump_regs(dev->tah_dev, buf);
- }
- local_irq_enable();
-}
-
-static int emac_ethtool_nway_reset(struct net_device *ndev)
-{
- struct ocp_enet_private *dev = ndev->priv;
- int res = 0;
-
- DBG("%d: nway_reset" NL, dev->def->index);
-
- if (dev->phy.address < 0)
- return -EOPNOTSUPP;
-
- local_bh_disable();
- if (!dev->phy.autoneg) {
- res = -EINVAL;
- goto out;
- }
-
- dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
- emac_force_link_update(dev);
-
- out:
- local_bh_enable();
- return res;
-}
-
-static int emac_get_sset_count(struct net_device *ndev, int sset)
-{
- switch (sset) {
- case ETH_SS_STATS:
- return EMAC_ETHTOOL_STATS_COUNT;
- default:
- return -EOPNOTSUPP;
- }
-}
-
-static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
- u8 * buf)
-{
- if (stringset == ETH_SS_STATS)
- memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
-}
-
-static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
- struct ethtool_stats *estats,
- u64 * tmp_stats)
-{
- struct ocp_enet_private *dev = ndev->priv;
- local_irq_disable();
- memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
- tmp_stats += sizeof(dev->stats) / sizeof(u64);
- memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
- local_irq_enable();
-}
-
-static void emac_ethtool_get_drvinfo(struct net_device *ndev,
- struct ethtool_drvinfo *info)
-{
- struct ocp_enet_private *dev = ndev->priv;
-
- strcpy(info->driver, "ibm_emac");
- strcpy(info->version, DRV_VERSION);
- info->fw_version[0] = '\0';
- sprintf(info->bus_info, "PPC 4xx EMAC %d", dev->def->index);
- info->regdump_len = emac_ethtool_get_regs_len(ndev);
-}
-
-static const struct ethtool_ops emac_ethtool_ops = {
- .get_settings = emac_ethtool_get_settings,
- .set_settings = emac_ethtool_set_settings,
- .get_drvinfo = emac_ethtool_get_drvinfo,
-
- .get_regs_len = emac_ethtool_get_regs_len,
- .get_regs = emac_ethtool_get_regs,
-
- .nway_reset = emac_ethtool_nway_reset,
-
- .get_ringparam = emac_ethtool_get_ringparam,
- .get_pauseparam = emac_ethtool_get_pauseparam,
-
- .get_rx_csum = emac_ethtool_get_rx_csum,
-
- .get_strings = emac_ethtool_get_strings,
- .get_sset_count = emac_get_sset_count,
- .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
-
- .get_link = ethtool_op_get_link,
-};
-
-static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
-{
- struct ocp_enet_private *dev = ndev->priv;
- uint16_t *data = (uint16_t *) & rq->ifr_ifru;
-
- DBG("%d: ioctl %08x" NL, dev->def->index, cmd);
-
- if (dev->phy.address < 0)
- return -EOPNOTSUPP;
-
- switch (cmd) {
- case SIOCGMIIPHY:
- case SIOCDEVPRIVATE:
- data[0] = dev->phy.address;
- /* Fall through */
- case SIOCGMIIREG:
- case SIOCDEVPRIVATE + 1:
- data[3] = emac_mdio_read(ndev, dev->phy.address, data[1]);
- return 0;
-
- case SIOCSMIIREG:
- case SIOCDEVPRIVATE + 2:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- emac_mdio_write(ndev, dev->phy.address, data[1], data[2]);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
-}
-
-static int __init emac_probe(struct ocp_device *ocpdev)
-{
- struct ocp_func_emac_data *emacdata = ocpdev->def->additions;
- struct net_device *ndev;
- struct ocp_device *maldev;
- struct ocp_enet_private *dev;
- int err, i;
- DECLARE_MAC_BUF(mac);
-
- DBG("%d: probe" NL, ocpdev->def->index);
-
- if (!emacdata) {
- printk(KERN_ERR "emac%d: Missing additional data!\n",
- ocpdev->def->index);
- return -ENODEV;
- }
-
- /* Allocate our net_device structure */
- ndev = alloc_etherdev(sizeof(struct ocp_enet_private));
- if (!ndev) {
- printk(KERN_ERR "emac%d: could not allocate ethernet device!\n",
- ocpdev->def->index);
- return -ENOMEM;
- }
- dev = ndev->priv;
- dev->ndev = ndev;
- dev->ldev = &ocpdev->dev;
- dev->def = ocpdev->def;
-
- /* Find MAL device we are connected to */
- maldev =
- ocp_find_device(OCP_VENDOR_IBM, OCP_FUNC_MAL, emacdata->mal_idx);
- if (!maldev) {
- printk(KERN_ERR "emac%d: unknown mal%d device!\n",
- dev->def->index, emacdata->mal_idx);
- err = -ENODEV;
- goto out;
- }
- dev->mal = ocp_get_drvdata(maldev);
- if (!dev->mal) {
- printk(KERN_ERR "emac%d: mal%d hasn't been initialized yet!\n",
- dev->def->index, emacdata->mal_idx);
- err = -ENODEV;
- goto out;
- }
-
- /* Register with MAL */
- dev->commac.ops = &emac_commac_ops;
- dev->commac.dev = dev;
- dev->commac.tx_chan_mask = MAL_CHAN_MASK(emacdata->mal_tx_chan);
- dev->commac.rx_chan_mask = MAL_CHAN_MASK(emacdata->mal_rx_chan);
- err = mal_register_commac(dev->mal, &dev->commac);
- if (err) {
- printk(KERN_ERR "emac%d: failed to register with mal%d!\n",
- dev->def->index, emacdata->mal_idx);
- goto out;
- }
- dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
- dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
-
- /* Get pointers to BD rings */
- dev->tx_desc =
- dev->mal->bd_virt + mal_tx_bd_offset(dev->mal,
- emacdata->mal_tx_chan);
- dev->rx_desc =
- dev->mal->bd_virt + mal_rx_bd_offset(dev->mal,
- emacdata->mal_rx_chan);
-
- DBG("%d: tx_desc %p" NL, ocpdev->def->index, dev->tx_desc);
- DBG("%d: rx_desc %p" NL, ocpdev->def->index, dev->rx_desc);
-
- /* Clean rings */
- memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
- memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
-
- /* If we depend on another EMAC for MDIO, check whether it was probed already */
- if (emacdata->mdio_idx >= 0 && emacdata->mdio_idx != ocpdev->def->index) {
- struct ocp_device *mdiodev =
- ocp_find_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC,
- emacdata->mdio_idx);
- if (!mdiodev) {
- printk(KERN_ERR "emac%d: unknown emac%d device!\n",
- dev->def->index, emacdata->mdio_idx);
- err = -ENODEV;
- goto out2;
- }
- dev->mdio_dev = ocp_get_drvdata(mdiodev);
- if (!dev->mdio_dev) {
- printk(KERN_ERR
- "emac%d: emac%d hasn't been initialized yet!\n",
- dev->def->index, emacdata->mdio_idx);
- err = -ENODEV;
- goto out2;
- }
- }
-
- /* Attach to ZMII, if needed */
- if ((err = zmii_attach(dev)) != 0)
- goto out2;
-
- /* Attach to RGMII, if needed */
- if ((err = rgmii_attach(dev)) != 0)
- goto out3;
-
- /* Attach to TAH, if needed */
- if ((err = tah_attach(dev)) != 0)
- goto out4;
-
- /* Map EMAC regs */
- dev->emacp = ioremap(dev->def->paddr, sizeof(struct emac_regs));
- if (!dev->emacp) {
- printk(KERN_ERR "emac%d: could not ioremap device registers!\n",
- dev->def->index);
- err = -ENOMEM;
- goto out5;
- }
-
- /* Fill in MAC address */
- for (i = 0; i < 6; ++i)
- ndev->dev_addr[i] = emacdata->mac_addr[i];
-
- /* Set some link defaults before we can find out real parameters */
- dev->phy.speed = SPEED_100;
- dev->phy.duplex = DUPLEX_FULL;
- dev->phy.autoneg = AUTONEG_DISABLE;
- dev->phy.pause = dev->phy.asym_pause = 0;
- dev->stop_timeout = STOP_TIMEOUT_100;
- init_timer(&dev->link_timer);
- dev->link_timer.function = emac_link_timer;
- dev->link_timer.data = (unsigned long)dev;
-
- /* Find PHY if any */
- dev->phy.dev = ndev;
- dev->phy.mode = emacdata->phy_mode;
- if (emacdata->phy_map != 0xffffffff) {
- u32 phy_map = emacdata->phy_map | busy_phy_map;
- u32 adv;
-
- DBG("%d: PHY maps %08x %08x" NL, dev->def->index,
- emacdata->phy_map, busy_phy_map);
-
- EMAC_RX_CLK_TX(dev->def->index);
-
- dev->phy.mdio_read = emac_mdio_read;
- dev->phy.mdio_write = emac_mdio_write;
-
- /* Configure EMAC with defaults so we can at least use MDIO
- * This is needed mostly for 440GX
- */
- if (emac_phy_gpcs(dev->phy.mode)) {
- /* XXX
- * Make GPCS PHY address equal to EMAC index.
- * We probably should take into account busy_phy_map
- * and/or phy_map here.
- */
- dev->phy.address = dev->def->index;
- }
-
- emac_configure(dev);
-
- for (i = 0; i < 0x20; phy_map >>= 1, ++i)
- if (!(phy_map & 1)) {
- int r;
- busy_phy_map |= 1 << i;
-
- /* Quick check if there is a PHY at the address */
- r = emac_mdio_read(dev->ndev, i, MII_BMCR);
- if (r == 0xffff || r < 0)
- continue;
- if (!mii_phy_probe(&dev->phy, i))
- break;
- }
- if (i == 0x20) {
- printk(KERN_WARNING "emac%d: can't find PHY!\n",
- dev->def->index);
- goto out6;
- }
-
- /* Init PHY */
- if (dev->phy.def->ops->init)
- dev->phy.def->ops->init(&dev->phy);
-
- /* Disable any PHY features not supported by the platform */
- dev->phy.def->features &= ~emacdata->phy_feat_exc;
-
- /* Setup initial link parameters */
- if (dev->phy.features & SUPPORTED_Autoneg) {
- adv = dev->phy.features;
-#if !defined(CONFIG_40x)
- adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
-#endif
- /* Restart autonegotiation */
- dev->phy.def->ops->setup_aneg(&dev->phy, adv);
- } else {
- u32 f = dev->phy.def->features;
- int speed = SPEED_10, fd = DUPLEX_HALF;
-
- /* Select highest supported speed/duplex */
- if (f & SUPPORTED_1000baseT_Full) {
- speed = SPEED_1000;
- fd = DUPLEX_FULL;
- } else if (f & SUPPORTED_1000baseT_Half)
- speed = SPEED_1000;
- else if (f & SUPPORTED_100baseT_Full) {
- speed = SPEED_100;
- fd = DUPLEX_FULL;
- } else if (f & SUPPORTED_100baseT_Half)
- speed = SPEED_100;
- else if (f & SUPPORTED_10baseT_Full)
- fd = DUPLEX_FULL;
-
- /* Force link parameters */
- dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
- }
- } else {
- emac_reset(dev);
-
- /* PHY-less configuration.
- * XXX I probably should move these settings to emacdata
- */
- dev->phy.address = -1;
- dev->phy.features = SUPPORTED_100baseT_Full | SUPPORTED_MII;
- dev->phy.pause = 1;
- }
-
- /* Fill in the driver function table */
- ndev->open = &emac_open;
- if (dev->tah_dev) {
- ndev->hard_start_xmit = &emac_start_xmit_sg;
- ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
- } else
- ndev->hard_start_xmit = &emac_start_xmit;
- ndev->tx_timeout = &emac_full_tx_reset;
- ndev->watchdog_timeo = 5 * HZ;
- ndev->stop = &emac_close;
- ndev->get_stats = &emac_stats;
- ndev->set_multicast_list = &emac_set_multicast_list;
- ndev->do_ioctl = &emac_ioctl;
- if (emac_phy_supports_gige(emacdata->phy_mode)) {
- ndev->change_mtu = &emac_change_mtu;
- dev->commac.ops = &emac_commac_sg_ops;
- }
- SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
-
- netif_carrier_off(ndev);
- netif_stop_queue(ndev);
-
- err = register_netdev(ndev);
- if (err) {
- printk(KERN_ERR "emac%d: failed to register net device (%d)!\n",
- dev->def->index, err);
- goto out6;
- }
-
- ocp_set_drvdata(ocpdev, dev);
-
- printk("%s: emac%d, MAC %s\n",
- ndev->name, dev->def->index, print_mac(mac, ndev->dev_addr));
-
- if (dev->phy.address >= 0)
- printk("%s: found %s PHY (0x%02x)\n", ndev->name,
- dev->phy.def->name, dev->phy.address);
-
- emac_dbg_register(dev->def->index, dev);
-
- return 0;
- out6:
- iounmap(dev->emacp);
- out5:
- tah_fini(dev->tah_dev);
- out4:
- rgmii_fini(dev->rgmii_dev, dev->rgmii_input);
- out3:
- zmii_fini(dev->zmii_dev, dev->zmii_input);
- out2:
- mal_unregister_commac(dev->mal, &dev->commac);
- out:
- kfree(ndev);
- return err;
-}
-
-static struct ocp_device_id emac_ids[] = {
- { .vendor = OCP_VENDOR_IBM, .function = OCP_FUNC_EMAC },
- { .vendor = OCP_VENDOR_INVALID}
-};
-
-static struct ocp_driver emac_driver = {
- .name = "emac",
- .id_table = emac_ids,
- .probe = emac_probe,
- .remove = emac_remove,
-};
-
-static int __init emac_init(void)
-{
- printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
-
- DBG(": init" NL);
-
- if (mal_init())
- return -ENODEV;
-
- EMAC_CLK_INTERNAL;
- if (ocp_register_driver(&emac_driver)) {
- EMAC_CLK_EXTERNAL;
- ocp_unregister_driver(&emac_driver);
- mal_exit();
- return -ENODEV;
- }
- EMAC_CLK_EXTERNAL;
-
- emac_init_debug();
- return 0;
-}
-
-static void __exit emac_exit(void)
-{
- DBG(": exit" NL);
- ocp_unregister_driver(&emac_driver);
- mal_exit();
- emac_fini_debug();
-}
-
-module_init(emac_init);
-module_exit(emac_exit);