--- /dev/null
+/*
+ * drivers/net/ethernet/ibm/emac/core.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller.
+ *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ * <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
+ * 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/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/pci.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 <linux/workqueue.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_net.h>
+#include <linux/slab.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/uaccess.h>
+#include <asm/dcr.h>
+#include <asm/dcr-regs.h>
+
+#include "core.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
+ *
+ * XXX This is something that needs to be reworked as we can have multiple
+ * EMAC "sets" (multiple ASICs containing several EMACs) though we can
+ * probably require in that case to have explicit PHY IDs in the device-tree
+ */
+static u32 busy_phy_map;
+static DEFINE_MUTEX(emac_phy_map_lock);
+
+/* This is the wait queue used to wait on any event related to probe, that
+ * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
+ */
+static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
+
+/* Having stable interface names is a doomed idea. However, it would be nice
+ * if we didn't have completely random interface names at boot too :-) It's
+ * just a matter of making everybody's life easier. Since we are doing
+ * threaded probing, it's a bit harder though. The base idea here is that
+ * we make up a list of all emacs in the device-tree before we register the
+ * driver. Every emac will then wait for the previous one in the list to
+ * initialize before itself. We should also keep that list ordered by
+ * cell_index.
+ * That list is only 4 entries long, meaning that additional EMACs don't
+ * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
+ */
+
+#define EMAC_BOOT_LIST_SIZE 4
+static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
+
+/* How long should I wait for dependent devices ? */
+#define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
+
+/* 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 emac_instance *dev,
+ const char *error)
+{
+ if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
+ EMAC_FTR_460EX_PHY_CLK_FIX |
+ EMAC_FTR_440EP_PHY_CLK_FIX))
+ DBG(dev, "%s" NL, error);
+ else if (net_ratelimit())
+ printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
+ error);
+}
+
+/* EMAC PHY clock workaround:
+ * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
+ * which allows controlling each EMAC clock
+ */
+static inline void emac_rx_clk_tx(struct emac_instance *dev)
+{
+#ifdef CONFIG_PPC_DCR_NATIVE
+ if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
+ dcri_clrset(SDR0, SDR0_MFR,
+ 0, SDR0_MFR_ECS >> dev->cell_index);
+#endif
+}
+
+static inline void emac_rx_clk_default(struct emac_instance *dev)
+{
+#ifdef CONFIG_PPC_DCR_NATIVE
+ if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
+ dcri_clrset(SDR0, SDR0_MFR,
+ SDR0_MFR_ECS >> dev->cell_index, 0);
+#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
+
+static unsigned char default_mcast_addr[] = {
+ 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
+};
+
+/* 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 emac_instance *dev);
+static void __emac_set_multicast_list(struct emac_instance *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_SGMII ||
+ phy_mode == PHY_MODE_TBI ||
+ phy_mode == PHY_MODE_RTBI;
+}
+
+static inline int emac_phy_gpcs(int phy_mode)
+{
+ return phy_mode == PHY_MODE_SGMII ||
+ phy_mode == PHY_MODE_TBI ||
+ phy_mode == PHY_MODE_RTBI;
+}
+
+static inline void emac_tx_enable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "tx_enable" NL);
+
+ r = in_be32(&p->mr0);
+ if (!(r & EMAC_MR0_TXE))
+ out_be32(&p->mr0, r | EMAC_MR0_TXE);
+}
+
+static void emac_tx_disable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "tx_disable" NL);
+
+ 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");
+ }
+}
+
+static void emac_rx_enable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
+ goto out;
+
+ DBG(dev, "rx_enable" NL);
+
+ 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:
+ ;
+}
+
+static void emac_rx_disable(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "rx_disable" NL);
+
+ 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");
+ }
+}
+
+static inline void emac_netif_stop(struct emac_instance *dev)
+{
+ netif_tx_lock_bh(dev->ndev);
+ netif_addr_lock(dev->ndev);
+ dev->no_mcast = 1;
+ netif_addr_unlock(dev->ndev);
+ netif_tx_unlock_bh(dev->ndev);
+ dev->ndev->trans_start = jiffies; /* prevent tx timeout */
+ mal_poll_disable(dev->mal, &dev->commac);
+ netif_tx_disable(dev->ndev);
+}
+
+static inline void emac_netif_start(struct emac_instance *dev)
+{
+ netif_tx_lock_bh(dev->ndev);
+ netif_addr_lock(dev->ndev);
+ dev->no_mcast = 0;
+ if (dev->mcast_pending && netif_running(dev->ndev))
+ __emac_set_multicast_list(dev);
+ netif_addr_unlock(dev->ndev);
+ netif_tx_unlock_bh(dev->ndev);
+
+ netif_wake_queue(dev->ndev);
+
+ /* NOTE: unconditional netif_wake_queue is only appropriate
+ * so long as all callers are assured to have free tx slots
+ * (taken from tg3... though the case where that is wrong is
+ * not terribly harmful)
+ */
+ mal_poll_enable(dev->mal, &dev->commac);
+}
+
+static inline void emac_rx_disable_async(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r;
+
+ DBG(dev, "rx_disable_async" NL);
+
+ r = in_be32(&p->mr0);
+ if (r & EMAC_MR0_RXE)
+ out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
+}
+
+static int emac_reset(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ int n = 20;
+
+ DBG(dev, "reset" NL);
+
+ 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);
+ }
+
+#ifdef CONFIG_PPC_DCR_NATIVE
+ /*
+ * PPC460EX/GT Embedded Processor Advanced User's Manual
+ * section 28.10.1 Mode Register 0 (EMACx_MR0) states:
+ * Note: The PHY must provide a TX Clk in order to perform a soft reset
+ * of the EMAC. If none is present, select the internal clock
+ * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1).
+ * After a soft reset, select the external clock.
+ */
+ if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
+ if (dev->phy_address == 0xffffffff &&
+ dev->phy_map == 0xffffffff) {
+ /* No PHY: select internal loop clock before reset */
+ dcri_clrset(SDR0, SDR0_ETH_CFG,
+ 0, SDR0_ETH_CFG_ECS << dev->cell_index);
+ } else {
+ /* PHY present: select external clock before reset */
+ dcri_clrset(SDR0, SDR0_ETH_CFG,
+ SDR0_ETH_CFG_ECS << dev->cell_index, 0);
+ }
+ }
+#endif
+
+ out_be32(&p->mr0, EMAC_MR0_SRST);
+ while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
+ --n;
+
+#ifdef CONFIG_PPC_DCR_NATIVE
+ if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
+ if (dev->phy_address == 0xffffffff &&
+ dev->phy_map == 0xffffffff) {
+ /* No PHY: restore external clock source after reset */
+ dcri_clrset(SDR0, SDR0_ETH_CFG,
+ SDR0_ETH_CFG_ECS << dev->cell_index, 0);
+ }
+ }
+#endif
+
+ 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 emac_instance *dev)
+{
+ const int regs = EMAC_XAHT_REGS(dev);
+ u32 *gaht_base = emac_gaht_base(dev);
+ u32 gaht_temp[regs];
+ struct netdev_hw_addr *ha;
+ int i;
+
+ DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev));
+
+ memset(gaht_temp, 0, sizeof (gaht_temp));
+
+ netdev_for_each_mc_addr(ha, dev->ndev) {
+ int slot, reg, mask;
+ DBG2(dev, "mc %pM" NL, ha->addr);
+
+ slot = EMAC_XAHT_CRC_TO_SLOT(dev,
+ ether_crc(ETH_ALEN, ha->addr));
+ reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
+ mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
+
+ gaht_temp[reg] |= mask;
+ }
+
+ for (i = 0; i < regs; i++)
+ out_be32(gaht_base + i, gaht_temp[i]);
+}
+
+static inline u32 emac_iff2rmr(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ u32 r;
+
+ r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
+
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r |= EMAC4_RMR_BASE;
+ else
+ r |= EMAC_RMR_BASE;
+
+ if (ndev->flags & IFF_PROMISC)
+ r |= EMAC_RMR_PME;
+ else if (ndev->flags & IFF_ALLMULTI ||
+ (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev)))
+ r |= EMAC_RMR_PMME;
+ else if (!netdev_mc_empty(ndev))
+ r |= EMAC_RMR_MAE;
+
+ if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
+ r &= ~EMAC4_RMR_MJS_MASK;
+ r |= EMAC4_RMR_MJS(ndev->mtu);
+ }
+
+ return r;
+}
+
+static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
+{
+ u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
+
+ DBG2(dev, "__emac_calc_base_mr1" NL);
+
+ switch(tx_size) {
+ case 2048:
+ ret |= EMAC_MR1_TFS_2K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
+ dev->ndev->name, tx_size);
+ }
+
+ switch(rx_size) {
+ case 16384:
+ ret |= EMAC_MR1_RFS_16K;
+ break;
+ case 4096:
+ ret |= EMAC_MR1_RFS_4K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
+ dev->ndev->name, rx_size);
+ }
+
+ return ret;
+}
+
+static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
+{
+ u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
+ EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
+
+ DBG2(dev, "__emac4_calc_base_mr1" NL);
+
+ switch(tx_size) {
+ case 16384:
+ ret |= EMAC4_MR1_TFS_16K;
+ break;
+ case 4096:
+ ret |= EMAC4_MR1_TFS_4K;
+ break;
+ case 2048:
+ ret |= EMAC4_MR1_TFS_2K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
+ dev->ndev->name, tx_size);
+ }
+
+ switch(rx_size) {
+ case 16384:
+ ret |= EMAC4_MR1_RFS_16K;
+ break;
+ case 4096:
+ ret |= EMAC4_MR1_RFS_4K;
+ break;
+ case 2048:
+ ret |= EMAC4_MR1_RFS_2K;
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
+ dev->ndev->name, rx_size);
+ }
+
+ return ret;
+}
+
+static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
+{
+ return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
+ __emac4_calc_base_mr1(dev, tx_size, rx_size) :
+ __emac_calc_base_mr1(dev, tx_size, rx_size);
+}
+
+static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
+{
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
+ else
+ return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
+}
+
+static inline u32 emac_calc_rwmr(struct emac_instance *dev,
+ unsigned int low, unsigned int high)
+{
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ return (low << 22) | ( (high & 0x3ff) << 6);
+ else
+ return (low << 23) | ( (high & 0x1ff) << 7);
+}
+
+static int emac_configure(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ struct net_device *ndev = dev->ndev;
+ int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
+ u32 r, mr1 = 0;
+
+ DBG(dev, "configure" NL);
+
+ if (!link) {
+ out_be32(&p->mr1, in_be32(&p->mr1)
+ | EMAC_MR1_FDE | EMAC_MR1_ILE);
+ udelay(100);
+ } else if (emac_reset(dev) < 0)
+ return -ETIMEDOUT;
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ tah_reset(dev->tah_dev);
+
+ DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
+ link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
+
+ /* Default fifo sizes */
+ tx_size = dev->tx_fifo_size;
+ rx_size = dev->rx_fifo_size;
+
+ /* No link, force loopback */
+ if (!link)
+ mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
+
+ /* Check for full duplex */
+ else if (dev->phy.duplex == DUPLEX_FULL)
+ mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
+
+ /* Adjust fifo sizes, mr1 and timeouts based on link speed */
+ dev->stop_timeout = STOP_TIMEOUT_10;
+ switch (dev->phy.speed) {
+ case SPEED_1000:
+ if (emac_phy_gpcs(dev->phy.mode)) {
+ mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
+ (dev->phy.gpcs_address != 0xffffffff) ?
+ dev->phy.gpcs_address : dev->phy.address);
+
+ /* Put some arbitrary OUI, Manuf & Rev IDs so we can
+ * identify this GPCS PHY later.
+ */
+ out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
+ } else
+ mr1 |= EMAC_MR1_MF_1000;
+
+ /* Extended fifo sizes */
+ tx_size = dev->tx_fifo_size_gige;
+ rx_size = dev->rx_fifo_size_gige;
+
+ if (dev->ndev->mtu > ETH_DATA_LEN) {
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ mr1 |= EMAC4_MR1_JPSM;
+ else
+ mr1 |= EMAC_MR1_JPSM;
+ dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
+ } else
+ dev->stop_timeout = STOP_TIMEOUT_1000;
+ break;
+ case SPEED_100:
+ mr1 |= EMAC_MR1_MF_100;
+ dev->stop_timeout = STOP_TIMEOUT_100;
+ break;
+ default: /* make gcc happy */
+ break;
+ }
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
+ dev->phy.speed);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
+
+ /* on 40x erratum forces us to NOT use integrated flow control,
+ * let's hope it works on 44x ;)
+ */
+ if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
+ dev->phy.duplex == DUPLEX_FULL) {
+ if (dev->phy.pause)
+ mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
+ else if (dev->phy.asym_pause)
+ mr1 |= EMAC_MR1_APP;
+ }
+
+ /* Add base settings & fifo sizes & program MR1 */
+ mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
+ out_be32(&p->mr1, mr1);
+
+ /* 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 */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
+ tx_size / 2 / dev->fifo_entry_size);
+ else
+ r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
+ tx_size / 2 / dev->fifo_entry_size);
+ out_be32(&p->tmr1, r);
+ out_be32(&p->trtr, emac_calc_trtr(dev, tx_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_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
+ rx_size / 4 / dev->fifo_entry_size);
+ out_be32(&p->rwmr, r);
+
+ /* Set PAUSE timer to the maximum */
+ out_be32(&p->ptr, 0xffff);
+
+ /* IRQ sources */
+ r = 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;
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
+ EMAC4_ISR_RXOE | */;
+ out_be32(&p->iser, r);
+
+ /* We need to take GPCS PHY out of isolate mode after EMAC reset */
+ if (emac_phy_gpcs(dev->phy.mode)) {
+ if (dev->phy.gpcs_address != 0xffffffff)
+ emac_mii_reset_gpcs(&dev->phy);
+ else
+ emac_mii_reset_phy(&dev->phy);
+ }
+
+ return 0;
+}
+
+static void emac_reinitialize(struct emac_instance *dev)
+{
+ DBG(dev, "reinitialize" NL);
+
+ emac_netif_stop(dev);
+ if (!emac_configure(dev)) {
+ emac_tx_enable(dev);
+ emac_rx_enable(dev);
+ }
+ emac_netif_start(dev);
+}
+
+static void emac_full_tx_reset(struct emac_instance *dev)
+{
+ DBG(dev, "full_tx_reset" NL);
+
+ emac_tx_disable(dev);
+ mal_disable_tx_channel(dev->mal, dev->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, dev->mal_tx_chan);
+ emac_tx_enable(dev);
+ emac_rx_enable(dev);
+}
+
+static void emac_reset_work(struct work_struct *work)
+{
+ struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
+
+ DBG(dev, "reset_work" NL);
+
+ mutex_lock(&dev->link_lock);
+ if (dev->opened) {
+ emac_netif_stop(dev);
+ emac_full_tx_reset(dev);
+ emac_netif_start(dev);
+ }
+ mutex_unlock(&dev->link_lock);
+}
+
+static void emac_tx_timeout(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ DBG(dev, "tx_timeout" NL);
+
+ schedule_work(&dev->reset_work);
+}
+
+
+static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
+{
+ int done = !!(stacr & EMAC_STACR_OC);
+
+ if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
+ done = !done;
+
+ return done;
+};
+
+static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r = 0;
+ int n, err = -ETIMEDOUT;
+
+ mutex_lock(&dev->mdio_lock);
+
+ DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
+
+ /* Enable proper MDIO port */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
+
+ /* Wait for management interface to become idle */
+ n = 20;
+ while (!emac_phy_done(dev, in_be32(&p->stacr))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait idle\n");
+ goto bail;
+ }
+ }
+
+ /* Issue read command */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r = EMAC4_STACR_BASE(dev->opb_bus_freq);
+ else
+ r = EMAC_STACR_BASE(dev->opb_bus_freq);
+ if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
+ r |= EMAC_STACR_OC;
+ if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
+ r |= EMACX_STACR_STAC_READ;
+ else
+ r |= EMAC_STACR_STAC_READ;
+ r |= (reg & EMAC_STACR_PRA_MASK)
+ | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
+ out_be32(&p->stacr, r);
+
+ /* Wait for read to complete */
+ n = 200;
+ while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait complete\n");
+ goto bail;
+ }
+ }
+
+ if (unlikely(r & EMAC_STACR_PHYE)) {
+ DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
+ err = -EREMOTEIO;
+ goto bail;
+ }
+
+ r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
+
+ DBG2(dev, "mdio_read -> %04x" NL, r);
+ err = 0;
+ bail:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
+ mutex_unlock(&dev->mdio_lock);
+
+ return err == 0 ? r : err;
+}
+
+static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
+ u16 val)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 r = 0;
+ int n, err = -ETIMEDOUT;
+
+ mutex_lock(&dev->mdio_lock);
+
+ DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
+
+ /* Enable proper MDIO port */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
+
+ /* Wait for management interface to be idle */
+ n = 20;
+ while (!emac_phy_done(dev, in_be32(&p->stacr))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait idle\n");
+ goto bail;
+ }
+ }
+
+ /* Issue write command */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ r = EMAC4_STACR_BASE(dev->opb_bus_freq);
+ else
+ r = EMAC_STACR_BASE(dev->opb_bus_freq);
+ if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
+ r |= EMAC_STACR_OC;
+ if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
+ r |= EMACX_STACR_STAC_WRITE;
+ else
+ r |= EMAC_STACR_STAC_WRITE;
+ r |= (reg & EMAC_STACR_PRA_MASK) |
+ ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
+ (val << EMAC_STACR_PHYD_SHIFT);
+ out_be32(&p->stacr, r);
+
+ /* Wait for write to complete */
+ n = 200;
+ while (!emac_phy_done(dev, in_be32(&p->stacr))) {
+ udelay(1);
+ if (!--n) {
+ DBG2(dev, " -> timeout wait complete\n");
+ goto bail;
+ }
+ }
+ err = 0;
+ bail:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
+ mutex_unlock(&dev->mdio_lock);
+}
+
+static int emac_mdio_read(struct net_device *ndev, int id, int reg)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int res;
+
+ res = __emac_mdio_read((dev->mdio_instance &&
+ dev->phy.gpcs_address != id) ?
+ dev->mdio_instance : dev,
+ (u8) id, (u8) reg);
+ return res;
+}
+
+static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ __emac_mdio_write((dev->mdio_instance &&
+ dev->phy.gpcs_address != id) ?
+ dev->mdio_instance : dev,
+ (u8) id, (u8) reg, (u16) val);
+}
+
+/* Tx lock BH */
+static void __emac_set_multicast_list(struct emac_instance *dev)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ u32 rmr = emac_iff2rmr(dev->ndev);
+
+ DBG(dev, "__multicast %08x" NL, rmr);
+
+ /* 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
+ *
+ * If we need the full reset, we might just trigger the workqueue
+ * and do it async... a bit nasty but should work --BenH
+ */
+ dev->mcast_pending = 0;
+ emac_rx_disable(dev);
+ if (rmr & EMAC_RMR_MAE)
+ emac_hash_mc(dev);
+ out_be32(&p->rmr, rmr);
+ emac_rx_enable(dev);
+}
+
+/* Tx lock BH */
+static void emac_set_multicast_list(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ DBG(dev, "multicast" NL);
+
+ BUG_ON(!netif_running(dev->ndev));
+
+ if (dev->no_mcast) {
+ dev->mcast_pending = 1;
+ return;
+ }
+ __emac_set_multicast_list(dev);
+}
+
+static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
+{
+ int rx_sync_size = emac_rx_sync_size(new_mtu);
+ int rx_skb_size = emac_rx_skb_size(new_mtu);
+ int i, ret = 0;
+ int mr1_jumbo_bit_change = 0;
+
+ mutex_lock(&dev->link_lock);
+ emac_netif_stop(dev);
+ emac_rx_disable(dev);
+ mal_disable_rx_channel(dev->mal, dev->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->ofdev->dev, 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 (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
+ mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ||
+ (dev->ndev->mtu > ETH_DATA_LEN);
+ } else {
+ mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^
+ (dev->ndev->mtu > ETH_DATA_LEN);
+ }
+
+ if (mr1_jumbo_bit_change) {
+ /* This is to prevent starting RX channel in emac_rx_enable() */
+ set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+
+ dev->ndev->mtu = new_mtu;
+ emac_full_tx_reset(dev);
+ }
+
+ mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
+ oom:
+ /* Restart RX */
+ clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+ dev->rx_slot = 0;
+ mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
+ emac_rx_enable(dev);
+ emac_netif_start(dev);
+ mutex_unlock(&dev->link_lock);
+
+ return ret;
+}
+
+/* Process ctx, rtnl_lock semaphore */
+static int emac_change_mtu(struct net_device *ndev, int new_mtu)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int ret = 0;
+
+ if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
+ return -EINVAL;
+
+ DBG(dev, "change_mtu(%d)" NL, new_mtu);
+
+ if (netif_running(ndev)) {
+ /* Check if we really need to reinitialize 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);
+ }
+
+ return ret;
+}
+
+static void emac_clean_tx_ring(struct emac_instance *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 emac_instance *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 emac_instance *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->ofdev->dev, skb->data - 2, dev->rx_sync_size,
+ DMA_FROM_DEVICE) + 2;
+ wmb();
+ 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 emac_instance *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 ? ", asymmetric 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 emac_instance *dev = netdev_priv(ndev);
+ int err, i;
+
+ DBG(dev, "open" NL);
+
+ /* Setup error IRQ handler */
+ err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
+ if (err) {
+ printk(KERN_ERR "%s: failed to request IRQ %d\n",
+ ndev->name, dev->emac_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;
+ }
+
+ dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
+ clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+ dev->rx_sg_skb = NULL;
+
+ mutex_lock(&dev->link_lock);
+ dev->opened = 1;
+
+ /* Start PHY polling now.
+ */
+ 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);
+ netif_carrier_on(dev->ndev);
+ link_poll_interval = PHY_POLL_LINK_ON;
+ } else {
+ emac_rx_clk_tx(dev);
+ netif_carrier_off(dev->ndev);
+ link_poll_interval = PHY_POLL_LINK_OFF;
+ }
+ dev->link_polling = 1;
+ wmb();
+ schedule_delayed_work(&dev->link_work, link_poll_interval);
+ emac_print_link_status(dev);
+ } else
+ netif_carrier_on(dev->ndev);
+
+ /* Required for Pause packet support in EMAC */
+ dev_mc_add_global(ndev, default_mcast_addr);
+
+ emac_configure(dev);
+ mal_poll_add(dev->mal, &dev->commac);
+ mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
+ mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
+ mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
+ emac_tx_enable(dev);
+ emac_rx_enable(dev);
+ emac_netif_start(dev);
+
+ mutex_unlock(&dev->link_lock);
+
+ return 0;
+ oom:
+ emac_clean_rx_ring(dev);
+ free_irq(dev->emac_irq, dev);
+
+ return -ENOMEM;
+}
+
+/* BHs disabled */
+#if 0
+static int emac_link_differs(struct emac_instance *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;
+}
+#endif
+
+static void emac_link_timer(struct work_struct *work)
+{
+ struct emac_instance *dev =
+ container_of(to_delayed_work(work),
+ struct emac_instance, link_work);
+ int link_poll_interval;
+
+ mutex_lock(&dev->link_lock);
+ DBG2(dev, "link timer" NL);
+
+ if (!dev->opened)
+ goto bail;
+
+ if (dev->phy.def->ops->poll_link(&dev->phy)) {
+ if (!netif_carrier_ok(dev->ndev)) {
+ emac_rx_clk_default(dev);
+ /* Get new link parameters */
+ dev->phy.def->ops->read_link(&dev->phy);
+
+ netif_carrier_on(dev->ndev);
+ emac_netif_stop(dev);
+ emac_full_tx_reset(dev);
+ emac_netif_start(dev);
+ emac_print_link_status(dev);
+ }
+ link_poll_interval = PHY_POLL_LINK_ON;
+ } else {
+ if (netif_carrier_ok(dev->ndev)) {
+ emac_rx_clk_tx(dev);
+ netif_carrier_off(dev->ndev);
+ netif_tx_disable(dev->ndev);
+ emac_reinitialize(dev);
+ emac_print_link_status(dev);
+ }
+ link_poll_interval = PHY_POLL_LINK_OFF;
+ }
+ schedule_delayed_work(&dev->link_work, link_poll_interval);
+ bail:
+ mutex_unlock(&dev->link_lock);
+}
+
+static void emac_force_link_update(struct emac_instance *dev)
+{
+ netif_carrier_off(dev->ndev);
+ smp_rmb();
+ if (dev->link_polling) {
+ cancel_delayed_work_sync(&dev->link_work);
+ if (dev->link_polling)
+ schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
+ }
+}
+
+/* Process ctx, rtnl_lock semaphore */
+static int emac_close(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ DBG(dev, "close" NL);
+
+ if (dev->phy.address >= 0) {
+ dev->link_polling = 0;
+ cancel_delayed_work_sync(&dev->link_work);
+ }
+ mutex_lock(&dev->link_lock);
+ emac_netif_stop(dev);
+ dev->opened = 0;
+ mutex_unlock(&dev->link_lock);
+
+ emac_rx_disable(dev);
+ emac_tx_disable(dev);
+ mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
+ mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
+ mal_poll_del(dev->mal, &dev->commac);
+
+ emac_clean_tx_ring(dev);
+ emac_clean_rx_ring(dev);
+
+ free_irq(dev->emac_irq, dev);
+
+ netif_carrier_off(ndev);
+
+ return 0;
+}
+
+static inline u16 emac_tx_csum(struct emac_instance *dev,
+ struct sk_buff *skb)
+{
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
+ (skb->ip_summed == CHECKSUM_PARTIAL)) {
+ ++dev->stats.tx_packets_csum;
+ return EMAC_TX_CTRL_TAH_CSUM;
+ }
+ return 0;
+}
+
+static inline int emac_xmit_finish(struct emac_instance *dev, int len)
+{
+ struct emac_regs __iomem *p = dev->emacp;
+ struct net_device *ndev = dev->ndev;
+
+ /* Send the packet out. If the if makes a significant perf
+ * difference, then we can store the TMR0 value in "dev"
+ * instead
+ */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4))
+ out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
+ else
+ out_be32(&p->tmr0, EMAC_TMR0_XMIT);
+
+ if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
+ netif_stop_queue(ndev);
+ DBG2(dev, "stopped TX queue" NL);
+ }
+
+ ndev->trans_start = jiffies;
+ ++dev->stats.tx_packets;
+ dev->stats.tx_bytes += len;
+
+ return NETDEV_TX_OK;
+}
+
+/* Tx lock BH */
+static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ 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(dev, "xmit(%u) %d" NL, len, slot);
+
+ dev->tx_skb[slot] = skb;
+ dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
+ skb->data, len,
+ DMA_TO_DEVICE);
+ dev->tx_desc[slot].data_len = (u16) len;
+ wmb();
+ dev->tx_desc[slot].ctrl = ctrl;
+
+ return emac_xmit_finish(dev, len);
+}
+
+static inline int emac_xmit_split(struct emac_instance *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;
+}
+
+/* Tx lock BH disabled (SG version for TAH equipped EMACs) */
+static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ 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->ofdev->dev, 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 = skb_frag_size(frag);
+
+ if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
+ goto undo_frame;
+
+ pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
+ DMA_TO_DEVICE);
+
+ slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
+ ctrl);
+ }
+
+ DBG2(dev, "xmit_sg(%u) %d - %d" NL, 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;
+ wmb();
+ 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(dev, "stopped TX queue" NL);
+ return NETDEV_TX_BUSY;
+}
+
+/* Tx lock BHs */
+static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
+{
+ struct emac_error_stats *st = &dev->estats;
+
+ DBG(dev, "BD TX error %04x" NL, 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 emac_instance *dev = param;
+ u32 bad_mask;
+
+ DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ bad_mask = EMAC_IS_BAD_TX_TAH;
+ else
+ bad_mask = EMAC_IS_BAD_TX;
+
+ netif_tx_lock_bh(dev->ndev);
+ 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(ctrl & bad_mask))
+ 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(dev, "tx %d pkts" NL, n);
+ }
+ }
+ netif_tx_unlock_bh(dev->ndev);
+}
+
+static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
+ int len)
+{
+ struct sk_buff *skb = dev->rx_skb[slot];
+
+ DBG2(dev, "recycle %d %d" NL, slot, len);
+
+ if (len)
+ dma_map_single(&dev->ofdev->dev, skb->data - 2,
+ EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
+
+ dev->rx_desc[slot].data_len = 0;
+ wmb();
+ 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 emac_instance *dev, u16 ctrl)
+{
+ struct emac_error_stats *st = &dev->estats;
+
+ DBG(dev, "BD RX error %04x" NL, 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 emac_instance *dev,
+ struct sk_buff *skb, u16 ctrl)
+{
+#ifdef 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 emac_instance *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 {
+ 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;
+}
+
+/* NAPI poll context */
+static int emac_poll_rx(void *param, int budget)
+{
+ struct emac_instance *dev = param;
+ int slot = dev->rx_slot, received = 0;
+
+ DBG2(dev, "poll_rx(%d)" NL, 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];
+ mb();
+ 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 < ETH_HLEN) {
+ ++dev->estats.rx_dropped_stack;
+ emac_recycle_rx_skb(dev, slot, len);
+ 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);
+ 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(dev, "rx OOM %d" NL, 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(dev, "rx OOM %d" NL, slot);
+ /* Drop the packet and recycle skb */
+ ++dev->estats.rx_dropped_oom;
+ emac_recycle_rx_skb(dev, slot, 0);
+ goto next;
+ }
+
+ if (received) {
+ DBG2(dev, "rx %d BDs" NL, received);
+ dev->rx_slot = slot;
+ }
+
+ if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
+ mb();
+ if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
+ DBG2(dev, "rx restart" NL);
+ received = 0;
+ goto again;
+ }
+
+ if (dev->rx_sg_skb) {
+ DBG2(dev, "dropping partial rx packet" NL);
+ ++dev->estats.rx_dropped_error;
+ dev_kfree_skb(dev->rx_sg_skb);
+ dev->rx_sg_skb = NULL;
+ }
+
+ clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
+ mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
+ emac_rx_enable(dev);
+ dev->rx_slot = 0;
+ }
+ return received;
+}
+
+/* NAPI poll context */
+static int emac_peek_rx(void *param)
+{
+ struct emac_instance *dev = param;
+
+ return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
+}
+
+/* NAPI poll context */
+static int emac_peek_rx_sg(void *param)
+{
+ struct emac_instance *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 emac_instance *dev = param;
+
+ ++dev->estats.rx_stopped;
+ emac_rx_disable_async(dev);
+}
+
+/* Hard IRQ */
+static irqreturn_t emac_irq(int irq, void *dev_instance)
+{
+ struct emac_instance *dev = dev_instance;
+ struct emac_regs __iomem *p = dev->emacp;
+ struct emac_error_stats *st = &dev->estats;
+ u32 isr;
+
+ spin_lock(&dev->lock);
+
+ isr = in_be32(&p->isr);
+ out_be32(&p->isr, isr);
+
+ DBG(dev, "isr = %08x" NL, isr);
+
+ if (isr & EMAC4_ISR_TXPE)
+ ++st->tx_parity;
+ if (isr & EMAC4_ISR_RXPE)
+ ++st->rx_parity;
+ if (isr & EMAC4_ISR_TXUE)
+ ++st->tx_underrun;
+ if (isr & EMAC4_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;
+
+ spin_unlock(&dev->lock);
+
+ return IRQ_HANDLED;
+}
+
+static struct net_device_stats *emac_stats(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ struct emac_stats *st = &dev->stats;
+ struct emac_error_stats *est = &dev->estats;
+ struct net_device_stats *nst = &dev->nstats;
+ unsigned long flags;
+
+ DBG2(dev, "stats" NL);
+
+ /* Compute "legacy" statistics */
+ spin_lock_irqsave(&dev->lock, flags);
+ 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);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return nst;
+}
+
+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 emac_instance *dev = netdev_priv(ndev);
+
+ 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;
+
+ mutex_lock(&dev->link_lock);
+ cmd->advertising = dev->phy.advertising;
+ cmd->autoneg = dev->phy.autoneg;
+ cmd->speed = dev->phy.speed;
+ cmd->duplex = dev->phy.duplex;
+ mutex_unlock(&dev->link_lock);
+
+ return 0;
+}
+
+static int emac_ethtool_set_settings(struct net_device *ndev,
+ struct ethtool_cmd *cmd)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ u32 f = dev->phy.features;
+
+ DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
+ 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;
+ }
+
+ mutex_lock(&dev->link_lock);
+ dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
+ cmd->duplex);
+ mutex_unlock(&dev->link_lock);
+
+ } else {
+ if (!(f & SUPPORTED_Autoneg))
+ return -EINVAL;
+
+ mutex_lock(&dev->link_lock);
+ dev->phy.def->ops->setup_aneg(&dev->phy,
+ (cmd->advertising & f) |
+ (dev->phy.advertising &
+ (ADVERTISED_Pause |
+ ADVERTISED_Asym_Pause)));
+ mutex_unlock(&dev->link_lock);
+ }
+ emac_force_link_update(dev);
+
+ 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 emac_instance *dev = netdev_priv(ndev);
+
+ mutex_lock(&dev->link_lock);
+ 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;
+ }
+ mutex_unlock(&dev->link_lock);
+}
+
+static int emac_get_regs_len(struct emac_instance *dev)
+{
+ return sizeof(struct emac_ethtool_regs_subhdr) +
+ sizeof(struct emac_regs);
+}
+
+static int emac_ethtool_get_regs_len(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int size;
+
+ size = sizeof(struct emac_ethtool_regs_hdr) +
+ emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ size += zmii_get_regs_len(dev->zmii_dev);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ size += rgmii_get_regs_len(dev->rgmii_dev);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ size += tah_get_regs_len(dev->tah_dev);
+
+ return size;
+}
+
+static void *emac_dump_regs(struct emac_instance *dev, void *buf)
+{
+ struct emac_ethtool_regs_subhdr *hdr = buf;
+
+ hdr->index = dev->cell_index;
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
+ hdr->version = EMAC4SYNC_ETHTOOL_REGS_VER;
+ } else if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
+ hdr->version = EMAC4_ETHTOOL_REGS_VER;
+ } else {
+ hdr->version = EMAC_ETHTOOL_REGS_VER;
+ }
+ memcpy_fromio(hdr + 1, dev->emacp, sizeof(struct emac_regs));
+ return (void *)(hdr + 1) + sizeof(struct emac_regs);
+}
+
+static void emac_ethtool_get_regs(struct net_device *ndev,
+ struct ethtool_regs *regs, void *buf)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ struct emac_ethtool_regs_hdr *hdr = buf;
+
+ hdr->components = 0;
+ buf = hdr + 1;
+
+ buf = mal_dump_regs(dev->mal, buf);
+ buf = emac_dump_regs(dev, buf);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
+ hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
+ buf = zmii_dump_regs(dev->zmii_dev, buf);
+ }
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
+ hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
+ buf = rgmii_dump_regs(dev->rgmii_dev, buf);
+ }
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
+ hdr->components |= EMAC_ETHTOOL_REGS_TAH;
+ buf = tah_dump_regs(dev->tah_dev, buf);
+ }
+}
+
+static int emac_ethtool_nway_reset(struct net_device *ndev)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+ int res = 0;
+
+ DBG(dev, "nway_reset" NL);
+
+ if (dev->phy.address < 0)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&dev->link_lock);
+ if (!dev->phy.autoneg) {
+ res = -EINVAL;
+ goto out;
+ }
+
+ dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
+ out:
+ mutex_unlock(&dev->link_lock);
+ emac_force_link_update(dev);
+ return res;
+}
+
+static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
+{
+ if (stringset == ETH_SS_STATS)
+ return EMAC_ETHTOOL_STATS_COUNT;
+ else
+ return -EINVAL;
+}
+
+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 emac_instance *dev = netdev_priv(ndev);
+
+ memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
+ tmp_stats += sizeof(dev->stats) / sizeof(u64);
+ memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
+}
+
+static void emac_ethtool_get_drvinfo(struct net_device *ndev,
+ struct ethtool_drvinfo *info)
+{
+ struct emac_instance *dev = netdev_priv(ndev);
+
+ strlcpy(info->driver, "ibm_emac", sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s",
+ dev->cell_index, dev->ofdev->dev.of_node->full_name);
+ 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_strings = emac_ethtool_get_strings,
+ .get_sset_count = emac_ethtool_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 emac_instance *dev = netdev_priv(ndev);
+ struct mii_ioctl_data *data = if_mii(rq);
+
+ DBG(dev, "ioctl %08x" NL, cmd);
+
+ if (dev->phy.address < 0)
+ return -EOPNOTSUPP;
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ data->phy_id = dev->phy.address;
+ /* Fall through */
+ case SIOCGMIIREG:
+ data->val_out = emac_mdio_read(ndev, dev->phy.address,
+ data->reg_num);
+ return 0;
+
+ case SIOCSMIIREG:
+ emac_mdio_write(ndev, dev->phy.address, data->reg_num,
+ data->val_in);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+struct emac_depentry {
+ u32 phandle;
+ struct device_node *node;
+ struct platform_device *ofdev;
+ void *drvdata;
+};
+
+#define EMAC_DEP_MAL_IDX 0
+#define EMAC_DEP_ZMII_IDX 1
+#define EMAC_DEP_RGMII_IDX 2
+#define EMAC_DEP_TAH_IDX 3
+#define EMAC_DEP_MDIO_IDX 4
+#define EMAC_DEP_PREV_IDX 5
+#define EMAC_DEP_COUNT 6
+
+static int emac_check_deps(struct emac_instance *dev,
+ struct emac_depentry *deps)
+{
+ int i, there = 0;
+ struct device_node *np;
+
+ for (i = 0; i < EMAC_DEP_COUNT; i++) {
+ /* no dependency on that item, allright */
+ if (deps[i].phandle == 0) {
+ there++;
+ continue;
+ }
+ /* special case for blist as the dependency might go away */
+ if (i == EMAC_DEP_PREV_IDX) {
+ np = *(dev->blist - 1);
+ if (np == NULL) {
+ deps[i].phandle = 0;
+ there++;
+ continue;
+ }
+ if (deps[i].node == NULL)
+ deps[i].node = of_node_get(np);
+ }
+ if (deps[i].node == NULL)
+ deps[i].node = of_find_node_by_phandle(deps[i].phandle);
+ if (deps[i].node == NULL)
+ continue;
+ if (deps[i].ofdev == NULL)
+ deps[i].ofdev = of_find_device_by_node(deps[i].node);
+ if (deps[i].ofdev == NULL)
+ continue;
+ if (deps[i].drvdata == NULL)
+ deps[i].drvdata = platform_get_drvdata(deps[i].ofdev);
+ if (deps[i].drvdata != NULL)
+ there++;
+ }
+ return there == EMAC_DEP_COUNT;
+}
+
+static void emac_put_deps(struct emac_instance *dev)
+{
+ of_dev_put(dev->mal_dev);
+ of_dev_put(dev->zmii_dev);
+ of_dev_put(dev->rgmii_dev);
+ of_dev_put(dev->mdio_dev);
+ of_dev_put(dev->tah_dev);
+}
+
+static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ /* We are only intereted in device addition */
+ if (action == BUS_NOTIFY_BOUND_DRIVER)
+ wake_up_all(&emac_probe_wait);
+ return 0;
+}
+
+static struct notifier_block emac_of_bus_notifier = {
+ .notifier_call = emac_of_bus_notify
+};
+
+static int emac_wait_deps(struct emac_instance *dev)
+{
+ struct emac_depentry deps[EMAC_DEP_COUNT];
+ int i, err;
+
+ memset(&deps, 0, sizeof(deps));
+
+ deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
+ deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
+ deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
+ if (dev->tah_ph)
+ deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
+ if (dev->mdio_ph)
+ deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
+ if (dev->blist && dev->blist > emac_boot_list)
+ deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
+ bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
+ wait_event_timeout(emac_probe_wait,
+ emac_check_deps(dev, deps),
+ EMAC_PROBE_DEP_TIMEOUT);
+ bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
+ err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
+ for (i = 0; i < EMAC_DEP_COUNT; i++) {
+ of_node_put(deps[i].node);
+ if (err)
+ of_dev_put(deps[i].ofdev);
+ }
+ if (err == 0) {
+ dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
+ dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
+ dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
+ dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
+ dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
+ }
+ of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
+ return err;
+}
+
+static int emac_read_uint_prop(struct device_node *np, const char *name,
+ u32 *val, int fatal)
+{
+ int len;
+ const u32 *prop = of_get_property(np, name, &len);
+ if (prop == NULL || len < sizeof(u32)) {
+ if (fatal)
+ printk(KERN_ERR "%s: missing %s property\n",
+ np->full_name, name);
+ return -ENODEV;
+ }
+ *val = *prop;
+ return 0;
+}
+
+static int emac_init_phy(struct emac_instance *dev)
+{
+ struct device_node *np = dev->ofdev->dev.of_node;
+ struct net_device *ndev = dev->ndev;
+ u32 phy_map, adv;
+ int i;
+
+ dev->phy.dev = ndev;
+ dev->phy.mode = dev->phy_mode;
+
+ /* PHY-less configuration.
+ * XXX I probably should move these settings to the dev tree
+ */
+ if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
+ emac_reset(dev);
+
+ /* PHY-less configuration.
+ * XXX I probably should move these settings to the dev tree
+ */
+ dev->phy.address = -1;
+ dev->phy.features = SUPPORTED_MII;
+ if (emac_phy_supports_gige(dev->phy_mode))
+ dev->phy.features |= SUPPORTED_1000baseT_Full;
+ else
+ dev->phy.features |= SUPPORTED_100baseT_Full;
+ dev->phy.pause = 1;
+
+ return 0;
+ }
+
+ mutex_lock(&emac_phy_map_lock);
+ phy_map = dev->phy_map | busy_phy_map;
+
+ DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
+
+ dev->phy.mdio_read = emac_mdio_read;
+ dev->phy.mdio_write = emac_mdio_write;
+
+ /* Enable internal clock source */
+#ifdef CONFIG_PPC_DCR_NATIVE
+ if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
+ dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
+#endif
+ /* PHY clock workaround */
+ emac_rx_clk_tx(dev);
+
+ /* Enable internal clock source on 440GX*/
+#ifdef CONFIG_PPC_DCR_NATIVE
+ if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
+ dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
+#endif
+ /* 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.
+ *
+ * Note that the busy_phy_map is currently global
+ * while it should probably be per-ASIC...
+ */
+ dev->phy.gpcs_address = dev->gpcs_address;
+ if (dev->phy.gpcs_address == 0xffffffff)
+ dev->phy.address = dev->cell_index;
+ }
+
+ emac_configure(dev);
+
+ if (dev->phy_address != 0xffffffff)
+ phy_map = ~(1 << dev->phy_address);
+
+ 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 (!emac_mii_phy_probe(&dev->phy, i))
+ break;
+ }
+
+ /* Enable external clock source */
+#ifdef CONFIG_PPC_DCR_NATIVE
+ if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
+ dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
+#endif
+ mutex_unlock(&emac_phy_map_lock);
+ if (i == 0x20) {
+ printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
+ return -ENXIO;
+ }
+
+ /* 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 &= ~dev->phy_feat_exc;
+ dev->phy.features &= ~dev->phy_feat_exc;
+
+ /* Setup initial link parameters */
+ if (dev->phy.features & SUPPORTED_Autoneg) {
+ adv = dev->phy.features;
+ if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
+ adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
+ /* 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);
+ }
+ return 0;
+}
+
+static int emac_init_config(struct emac_instance *dev)
+{
+ struct device_node *np = dev->ofdev->dev.of_node;
+ const void *p;
+
+ /* Read config from device-tree */
+ if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
+ dev->max_mtu = 1500;
+ if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
+ dev->rx_fifo_size = 2048;
+ if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
+ dev->tx_fifo_size = 2048;
+ if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
+ dev->rx_fifo_size_gige = dev->rx_fifo_size;
+ if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
+ dev->tx_fifo_size_gige = dev->tx_fifo_size;
+ if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
+ dev->phy_address = 0xffffffff;
+ if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
+ dev->phy_map = 0xffffffff;
+ if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
+ dev->gpcs_address = 0xffffffff;
+ if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
+ return -ENXIO;
+ if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
+ dev->tah_ph = 0;
+ if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
+ dev->tah_port = 0;
+ if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
+ dev->mdio_ph = 0;
+ if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
+ dev->zmii_ph = 0;
+ if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
+ dev->zmii_port = 0xffffffff;
+ if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
+ dev->rgmii_ph = 0;
+ if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
+ dev->rgmii_port = 0xffffffff;
+ if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
+ dev->fifo_entry_size = 16;
+ if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
+ dev->mal_burst_size = 256;
+
+ /* PHY mode needs some decoding */
+ dev->phy_mode = of_get_phy_mode(np);
+ if (dev->phy_mode < 0)
+ dev->phy_mode = PHY_MODE_NA;
+
+ /* Check EMAC version */
+ if (of_device_is_compatible(np, "ibm,emac4sync")) {
+ dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
+ if (of_device_is_compatible(np, "ibm,emac-460ex") ||
+ of_device_is_compatible(np, "ibm,emac-460gt"))
+ dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
+ if (of_device_is_compatible(np, "ibm,emac-405ex") ||
+ of_device_is_compatible(np, "ibm,emac-405exr"))
+ dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
+ if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
+ dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
+ EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
+ EMAC_FTR_460EX_PHY_CLK_FIX);
+ }
+ } else if (of_device_is_compatible(np, "ibm,emac4")) {
+ dev->features |= EMAC_FTR_EMAC4;
+ if (of_device_is_compatible(np, "ibm,emac-440gx"))
+ dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
+ } else {
+ if (of_device_is_compatible(np, "ibm,emac-440ep") ||
+ of_device_is_compatible(np, "ibm,emac-440gr"))
+ dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
+ if (of_device_is_compatible(np, "ibm,emac-405ez")) {
+#ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
+ dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
+#else
+ printk(KERN_ERR "%s: Flow control not disabled!\n",
+ np->full_name);
+ return -ENXIO;
+#endif
+ }
+
+ }
+
+ /* Fixup some feature bits based on the device tree */
+ if (of_get_property(np, "has-inverted-stacr-oc", NULL))
+ dev->features |= EMAC_FTR_STACR_OC_INVERT;
+ if (of_get_property(np, "has-new-stacr-staopc", NULL))
+ dev->features |= EMAC_FTR_HAS_NEW_STACR;
+
+ /* CAB lacks the appropriate properties */
+ if (of_device_is_compatible(np, "ibm,emac-axon"))
+ dev->features |= EMAC_FTR_HAS_NEW_STACR |
+ EMAC_FTR_STACR_OC_INVERT;
+
+ /* Enable TAH/ZMII/RGMII features as found */
+ if (dev->tah_ph != 0) {
+#ifdef CONFIG_IBM_EMAC_TAH
+ dev->features |= EMAC_FTR_HAS_TAH;
+#else
+ printk(KERN_ERR "%s: TAH support not enabled !\n",
+ np->full_name);
+ return -ENXIO;
+#endif
+ }
+
+ if (dev->zmii_ph != 0) {
+#ifdef CONFIG_IBM_EMAC_ZMII
+ dev->features |= EMAC_FTR_HAS_ZMII;
+#else
+ printk(KERN_ERR "%s: ZMII support not enabled !\n",
+ np->full_name);
+ return -ENXIO;
+#endif
+ }
+
+ if (dev->rgmii_ph != 0) {
+#ifdef CONFIG_IBM_EMAC_RGMII
+ dev->features |= EMAC_FTR_HAS_RGMII;
+#else
+ printk(KERN_ERR "%s: RGMII support not enabled !\n",
+ np->full_name);
+ return -ENXIO;
+#endif
+ }
+
+ /* Read MAC-address */
+ p = of_get_property(np, "local-mac-address", NULL);
+ if (p == NULL) {
+ printk(KERN_ERR "%s: Can't find local-mac-address property\n",
+ np->full_name);
+ return -ENXIO;
+ }
+ memcpy(dev->ndev->dev_addr, p, ETH_ALEN);
+
+ /* IAHT and GAHT filter parameterization */
+ if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
+ dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
+ dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
+ } else {
+ dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
+ dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
+ }
+
+ DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
+ DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
+ DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
+ DBG(dev, "max_mtu : %d\n", dev->max_mtu);
+ DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
+
+ return 0;
+}
+
+static const struct net_device_ops emac_netdev_ops = {
+ .ndo_open = emac_open,
+ .ndo_stop = emac_close,
+ .ndo_get_stats = emac_stats,
+ .ndo_set_rx_mode = emac_set_multicast_list,
+ .ndo_do_ioctl = emac_ioctl,
+ .ndo_tx_timeout = emac_tx_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_start_xmit = emac_start_xmit,
+ .ndo_change_mtu = eth_change_mtu,
+};
+
+static const struct net_device_ops emac_gige_netdev_ops = {
+ .ndo_open = emac_open,
+ .ndo_stop = emac_close,
+ .ndo_get_stats = emac_stats,
+ .ndo_set_rx_mode = emac_set_multicast_list,
+ .ndo_do_ioctl = emac_ioctl,
+ .ndo_tx_timeout = emac_tx_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_start_xmit = emac_start_xmit_sg,
+ .ndo_change_mtu = emac_change_mtu,
+};
+
+static int emac_probe(struct platform_device *ofdev)
+{
+ struct net_device *ndev;
+ struct emac_instance *dev;
+ struct device_node *np = ofdev->dev.of_node;
+ struct device_node **blist = NULL;
+ int err, i;
+
+ /* Skip unused/unwired EMACS. We leave the check for an unused
+ * property here for now, but new flat device trees should set a
+ * status property to "disabled" instead.
+ */
+ if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
+ return -ENODEV;
+
+ /* Find ourselves in the bootlist if we are there */
+ for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
+ if (emac_boot_list[i] == np)
+ blist = &emac_boot_list[i];
+
+ /* Allocate our net_device structure */
+ err = -ENOMEM;
+ ndev = alloc_etherdev(sizeof(struct emac_instance));
+ if (!ndev)
+ goto err_gone;
+
+ dev = netdev_priv(ndev);
+ dev->ndev = ndev;
+ dev->ofdev = ofdev;
+ dev->blist = blist;
+ SET_NETDEV_DEV(ndev, &ofdev->dev);
+
+ /* Initialize some embedded data structures */
+ mutex_init(&dev->mdio_lock);
+ mutex_init(&dev->link_lock);
+ spin_lock_init(&dev->lock);
+ INIT_WORK(&dev->reset_work, emac_reset_work);
+
+ /* Init various config data based on device-tree */
+ err = emac_init_config(dev);
+ if (err != 0)
+ goto err_free;
+
+ /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
+ dev->emac_irq = irq_of_parse_and_map(np, 0);
+ dev->wol_irq = irq_of_parse_and_map(np, 1);
+ if (dev->emac_irq == NO_IRQ) {
+ printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
+ goto err_free;
+ }
+ ndev->irq = dev->emac_irq;
+
+ /* Map EMAC regs */
+ if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
+ printk(KERN_ERR "%s: Can't get registers address\n",
+ np->full_name);
+ goto err_irq_unmap;
+ }
+ // TODO : request_mem_region
+ dev->emacp = ioremap(dev->rsrc_regs.start,
+ resource_size(&dev->rsrc_regs));
+ if (dev->emacp == NULL) {
+ printk(KERN_ERR "%s: Can't map device registers!\n",
+ np->full_name);
+ err = -ENOMEM;
+ goto err_irq_unmap;
+ }
+
+ /* Wait for dependent devices */
+ err = emac_wait_deps(dev);
+ if (err) {
+ printk(KERN_ERR
+ "%s: Timeout waiting for dependent devices\n",
+ np->full_name);
+ /* display more info about what's missing ? */
+ goto err_reg_unmap;
+ }
+ dev->mal = platform_get_drvdata(dev->mal_dev);
+ if (dev->mdio_dev != NULL)
+ dev->mdio_instance = platform_get_drvdata(dev->mdio_dev);
+
+ /* Register with MAL */
+ dev->commac.ops = &emac_commac_ops;
+ dev->commac.dev = dev;
+ dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
+ dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
+ err = mal_register_commac(dev->mal, &dev->commac);
+ if (err) {
+ printk(KERN_ERR "%s: failed to register with mal %s!\n",
+ np->full_name, dev->mal_dev->dev.of_node->full_name);
+ goto err_rel_deps;
+ }
+ 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, dev->mal_tx_chan);
+ dev->rx_desc =
+ dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
+
+ DBG(dev, "tx_desc %p" NL, dev->tx_desc);
+ DBG(dev, "rx_desc %p" NL, 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));
+ memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
+ memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
+
+ /* Attach to ZMII, if needed */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
+ (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
+ goto err_unreg_commac;
+
+ /* Attach to RGMII, if needed */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
+ (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
+ goto err_detach_zmii;
+
+ /* Attach to TAH, if needed */
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
+ (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
+ goto err_detach_rgmii;
+
+ /* 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_DELAYED_WORK(&dev->link_work, emac_link_timer);
+
+ /* Some SoCs like APM821xx does not support Half Duplex mode. */
+ if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
+ dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
+ SUPPORTED_100baseT_Half |
+ SUPPORTED_10baseT_Half);
+ }
+
+ /* Find PHY if any */
+ err = emac_init_phy(dev);
+ if (err != 0)
+ goto err_detach_tah;
+
+ if (dev->tah_dev) {
+ ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
+ ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
+ }
+ ndev->watchdog_timeo = 5 * HZ;
+ if (emac_phy_supports_gige(dev->phy_mode)) {
+ ndev->netdev_ops = &emac_gige_netdev_ops;
+ dev->commac.ops = &emac_commac_sg_ops;
+ } else
+ ndev->netdev_ops = &emac_netdev_ops;
+ ndev->ethtool_ops = &emac_ethtool_ops;
+
+ netif_carrier_off(ndev);
+
+ err = register_netdev(ndev);
+ if (err) {
+ printk(KERN_ERR "%s: failed to register net device (%d)!\n",
+ np->full_name, err);
+ goto err_detach_tah;
+ }
+
+ /* Set our drvdata last as we don't want them visible until we are
+ * fully initialized
+ */
+ wmb();
+ platform_set_drvdata(ofdev, dev);
+
+ /* There's a new kid in town ! Let's tell everybody */
+ wake_up_all(&emac_probe_wait);
+
+
+ printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
+ ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
+
+ if (dev->phy_mode == PHY_MODE_SGMII)
+ printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
+
+ 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);
+
+ /* Life is good */
+ return 0;
+
+ /* I have a bad feeling about this ... */
+
+ err_detach_tah:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ tah_detach(dev->tah_dev, dev->tah_port);
+ err_detach_rgmii:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
+ err_detach_zmii:
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_detach(dev->zmii_dev, dev->zmii_port);
+ err_unreg_commac:
+ mal_unregister_commac(dev->mal, &dev->commac);
+ err_rel_deps:
+ emac_put_deps(dev);
+ err_reg_unmap:
+ iounmap(dev->emacp);
+ err_irq_unmap:
+ if (dev->wol_irq != NO_IRQ)
+ irq_dispose_mapping(dev->wol_irq);
+ if (dev->emac_irq != NO_IRQ)
+ irq_dispose_mapping(dev->emac_irq);
+ err_free:
+ free_netdev(ndev);
+ err_gone:
+ /* if we were on the bootlist, remove us as we won't show up and
+ * wake up all waiters to notify them in case they were waiting
+ * on us
+ */
+ if (blist) {
+ *blist = NULL;
+ wake_up_all(&emac_probe_wait);
+ }
+ return err;
+}
+
+static int emac_remove(struct platform_device *ofdev)
+{
+ struct emac_instance *dev = platform_get_drvdata(ofdev);
+
+ DBG(dev, "remove" NL);
+
+ unregister_netdev(dev->ndev);
+
+ cancel_work_sync(&dev->reset_work);
+
+ if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
+ tah_detach(dev->tah_dev, dev->tah_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
+ rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
+ if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
+ zmii_detach(dev->zmii_dev, dev->zmii_port);
+
+ busy_phy_map &= ~(1 << dev->phy.address);
+ DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
+
+ mal_unregister_commac(dev->mal, &dev->commac);
+ emac_put_deps(dev);
+
+ emac_dbg_unregister(dev);
+ iounmap(dev->emacp);
+
+ if (dev->wol_irq != NO_IRQ)
+ irq_dispose_mapping(dev->wol_irq);
+ if (dev->emac_irq != NO_IRQ)
+ irq_dispose_mapping(dev->emac_irq);
+
+ free_netdev(dev->ndev);
+
+ return 0;
+}
+
+/* XXX Features in here should be replaced by properties... */
+static const struct of_device_id emac_match[] =
+{
+ {
+ .type = "network",
+ .compatible = "ibm,emac",
+ },
+ {
+ .type = "network",
+ .compatible = "ibm,emac4",
+ },
+ {
+ .type = "network",
+ .compatible = "ibm,emac4sync",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, emac_match);
+
+static struct platform_driver emac_driver = {
+ .driver = {
+ .name = "emac",
+ .of_match_table = emac_match,
+ },
+ .probe = emac_probe,
+ .remove = emac_remove,
+};
+
+static void __init emac_make_bootlist(void)
+{
+ struct device_node *np = NULL;
+ int j, max, i = 0, k;
+ int cell_indices[EMAC_BOOT_LIST_SIZE];
+
+ /* Collect EMACs */
+ while((np = of_find_all_nodes(np)) != NULL) {
+ const u32 *idx;
+
+ if (of_match_node(emac_match, np) == NULL)
+ continue;
+ if (of_get_property(np, "unused", NULL))
+ continue;
+ idx = of_get_property(np, "cell-index", NULL);
+ if (idx == NULL)
+ continue;
+ cell_indices[i] = *idx;
+ emac_boot_list[i++] = of_node_get(np);
+ if (i >= EMAC_BOOT_LIST_SIZE) {
+ of_node_put(np);
+ break;
+ }
+ }
+ max = i;
+
+ /* Bubble sort them (doh, what a creative algorithm :-) */
+ for (i = 0; max > 1 && (i < (max - 1)); i++)
+ for (j = i; j < max; j++) {
+ if (cell_indices[i] > cell_indices[j]) {
+ np = emac_boot_list[i];
+ emac_boot_list[i] = emac_boot_list[j];
+ emac_boot_list[j] = np;
+ k = cell_indices[i];
+ cell_indices[i] = cell_indices[j];
+ cell_indices[j] = k;
+ }
+ }
+}
+
+static int __init emac_init(void)
+{
+ int rc;
+
+ printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
+
+ /* Init debug stuff */
+ emac_init_debug();
+
+ /* Build EMAC boot list */
+ emac_make_bootlist();
+
+ /* Init submodules */
+ rc = mal_init();
+ if (rc)
+ goto err;
+ rc = zmii_init();
+ if (rc)
+ goto err_mal;
+ rc = rgmii_init();
+ if (rc)
+ goto err_zmii;
+ rc = tah_init();
+ if (rc)
+ goto err_rgmii;
+ rc = platform_driver_register(&emac_driver);
+ if (rc)
+ goto err_tah;
+
+ return 0;
+
+ err_tah:
+ tah_exit();
+ err_rgmii:
+ rgmii_exit();
+ err_zmii:
+ zmii_exit();
+ err_mal:
+ mal_exit();
+ err:
+ return rc;
+}
+
+static void __exit emac_exit(void)
+{
+ int i;
+
+ platform_driver_unregister(&emac_driver);
+
+ tah_exit();
+ rgmii_exit();
+ zmii_exit();
+ mal_exit();
+ emac_fini_debug();
+
+ /* Destroy EMAC boot list */
+ for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
+ of_node_put(emac_boot_list[i]);
+}
+
+module_init(emac_init);
+module_exit(emac_exit);
Code Review / kvmfornfv.git / blobdiff