diff options
Diffstat (limited to 'drivers/net/sb1250-mac.c')
| -rw-r--r-- | drivers/net/sb1250-mac.c | 2690 |
1 files changed, 0 insertions, 2690 deletions
diff --git a/drivers/net/sb1250-mac.c b/drivers/net/sb1250-mac.c deleted file mode 100644 index ea65f7ec360a..000000000000 --- a/drivers/net/sb1250-mac.c +++ /dev/null @@ -1,2690 +0,0 @@ -/* - * Copyright (C) 2001,2002,2003,2004 Broadcom Corporation - * Copyright (c) 2006, 2007 Maciej W. Rozycki - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * - * This driver is designed for the Broadcom SiByte SOC built-in - * Ethernet controllers. Written by Mitch Lichtenberg at Broadcom Corp. - * - * Updated to the driver model and the PHY abstraction layer - * by Maciej W. Rozycki. - */ - -#include <linux/bug.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/errno.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/init.h> -#include <linux/bitops.h> -#include <linux/err.h> -#include <linux/ethtool.h> -#include <linux/mii.h> -#include <linux/phy.h> -#include <linux/platform_device.h> -#include <linux/prefetch.h> - -#include <asm/cache.h> -#include <asm/io.h> -#include <asm/processor.h> /* Processor type for cache alignment. */ - -/* Operational parameters that usually are not changed. */ - -#define CONFIG_SBMAC_COALESCE - -/* Time in jiffies before concluding the transmitter is hung. */ -#define TX_TIMEOUT (2*HZ) - - -MODULE_AUTHOR("Mitch Lichtenberg (Broadcom Corp.)"); -MODULE_DESCRIPTION("Broadcom SiByte SOC GB Ethernet driver"); - -/* A few user-configurable values which may be modified when a driver - module is loaded. */ - -/* 1 normal messages, 0 quiet .. 7 verbose. */ -static int debug = 1; -module_param(debug, int, S_IRUGO); -MODULE_PARM_DESC(debug, "Debug messages"); - -#ifdef CONFIG_SBMAC_COALESCE -static int int_pktcnt_tx = 255; -module_param(int_pktcnt_tx, int, S_IRUGO); -MODULE_PARM_DESC(int_pktcnt_tx, "TX packet count"); - -static int int_timeout_tx = 255; -module_param(int_timeout_tx, int, S_IRUGO); -MODULE_PARM_DESC(int_timeout_tx, "TX timeout value"); - -static int int_pktcnt_rx = 64; -module_param(int_pktcnt_rx, int, S_IRUGO); -MODULE_PARM_DESC(int_pktcnt_rx, "RX packet count"); - -static int int_timeout_rx = 64; -module_param(int_timeout_rx, int, S_IRUGO); -MODULE_PARM_DESC(int_timeout_rx, "RX timeout value"); -#endif - -#include <asm/sibyte/board.h> -#include <asm/sibyte/sb1250.h> -#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) -#include <asm/sibyte/bcm1480_regs.h> -#include <asm/sibyte/bcm1480_int.h> -#define R_MAC_DMA_OODPKTLOST_RX R_MAC_DMA_OODPKTLOST -#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) -#include <asm/sibyte/sb1250_regs.h> -#include <asm/sibyte/sb1250_int.h> -#else -#error invalid SiByte MAC configuration -#endif -#include <asm/sibyte/sb1250_scd.h> -#include <asm/sibyte/sb1250_mac.h> -#include <asm/sibyte/sb1250_dma.h> - -#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) -#define UNIT_INT(n) (K_BCM1480_INT_MAC_0 + ((n) * 2)) -#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) -#define UNIT_INT(n) (K_INT_MAC_0 + (n)) -#else -#error invalid SiByte MAC configuration -#endif - -#ifdef K_INT_PHY -#define SBMAC_PHY_INT K_INT_PHY -#else -#define SBMAC_PHY_INT PHY_POLL -#endif - -/********************************************************************** - * Simple types - ********************************************************************* */ - -enum sbmac_speed { - sbmac_speed_none = 0, - sbmac_speed_10 = SPEED_10, - sbmac_speed_100 = SPEED_100, - sbmac_speed_1000 = SPEED_1000, -}; - -enum sbmac_duplex { - sbmac_duplex_none = -1, - sbmac_duplex_half = DUPLEX_HALF, - sbmac_duplex_full = DUPLEX_FULL, -}; - -enum sbmac_fc { - sbmac_fc_none, - sbmac_fc_disabled, - sbmac_fc_frame, - sbmac_fc_collision, - sbmac_fc_carrier, -}; - -enum sbmac_state { - sbmac_state_uninit, - sbmac_state_off, - sbmac_state_on, - sbmac_state_broken, -}; - - -/********************************************************************** - * Macros - ********************************************************************* */ - - -#define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ? \ - (d)->sbdma_dscrtable : (d)->f+1) - - -#define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES) - -#define SBMAC_MAX_TXDESCR 256 -#define SBMAC_MAX_RXDESCR 256 - -#define ETHER_ADDR_LEN 6 -#define ENET_PACKET_SIZE 1518 -/*#define ENET_PACKET_SIZE 9216 */ - -/********************************************************************** - * DMA Descriptor structure - ********************************************************************* */ - -struct sbdmadscr { - uint64_t dscr_a; - uint64_t dscr_b; -}; - -/********************************************************************** - * DMA Controller structure - ********************************************************************* */ - -struct sbmacdma { - - /* - * This stuff is used to identify the channel and the registers - * associated with it. - */ - struct sbmac_softc *sbdma_eth; /* back pointer to associated - MAC */ - int sbdma_channel; /* channel number */ - int sbdma_txdir; /* direction (1=transmit) */ - int sbdma_maxdescr; /* total # of descriptors - in ring */ -#ifdef CONFIG_SBMAC_COALESCE - int sbdma_int_pktcnt; - /* # descriptors rx/tx - before interrupt */ - int sbdma_int_timeout; - /* # usec rx/tx interrupt */ -#endif - void __iomem *sbdma_config0; /* DMA config register 0 */ - void __iomem *sbdma_config1; /* DMA config register 1 */ - void __iomem *sbdma_dscrbase; - /* descriptor base address */ - void __iomem *sbdma_dscrcnt; /* descriptor count register */ - void __iomem *sbdma_curdscr; /* current descriptor - address */ - void __iomem *sbdma_oodpktlost; - /* pkt drop (rx only) */ - - /* - * This stuff is for maintenance of the ring - */ - void *sbdma_dscrtable_unaligned; - struct sbdmadscr *sbdma_dscrtable; - /* base of descriptor table */ - struct sbdmadscr *sbdma_dscrtable_end; - /* end of descriptor table */ - struct sk_buff **sbdma_ctxtable; - /* context table, one - per descr */ - dma_addr_t sbdma_dscrtable_phys; - /* and also the phys addr */ - struct sbdmadscr *sbdma_addptr; /* next dscr for sw to add */ - struct sbdmadscr *sbdma_remptr; /* next dscr for sw - to remove */ -}; - - -/********************************************************************** - * Ethernet softc structure - ********************************************************************* */ - -struct sbmac_softc { - - /* - * Linux-specific things - */ - struct net_device *sbm_dev; /* pointer to linux device */ - struct napi_struct napi; - struct phy_device *phy_dev; /* the associated PHY device */ - struct mii_bus *mii_bus; /* the MII bus */ - int phy_irq[PHY_MAX_ADDR]; - spinlock_t sbm_lock; /* spin lock */ - int sbm_devflags; /* current device flags */ - - /* - * Controller-specific things - */ - void __iomem *sbm_base; /* MAC's base address */ - enum sbmac_state sbm_state; /* current state */ - - void __iomem *sbm_macenable; /* MAC Enable Register */ - void __iomem *sbm_maccfg; /* MAC Config Register */ - void __iomem *sbm_fifocfg; /* FIFO Config Register */ - void __iomem *sbm_framecfg; /* Frame Config Register */ - void __iomem *sbm_rxfilter; /* Receive Filter Register */ - void __iomem *sbm_isr; /* Interrupt Status Register */ - void __iomem *sbm_imr; /* Interrupt Mask Register */ - void __iomem *sbm_mdio; /* MDIO Register */ - - enum sbmac_speed sbm_speed; /* current speed */ - enum sbmac_duplex sbm_duplex; /* current duplex */ - enum sbmac_fc sbm_fc; /* cur. flow control setting */ - int sbm_pause; /* current pause setting */ - int sbm_link; /* current link state */ - - unsigned char sbm_hwaddr[ETHER_ADDR_LEN]; - - struct sbmacdma sbm_txdma; /* only channel 0 for now */ - struct sbmacdma sbm_rxdma; - int rx_hw_checksum; - int sbe_idx; -}; - - -/********************************************************************** - * Externs - ********************************************************************* */ - -/********************************************************************** - * Prototypes - ********************************************************************* */ - -static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan, - int txrx, int maxdescr); -static void sbdma_channel_start(struct sbmacdma *d, int rxtx); -static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d, - struct sk_buff *m); -static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *m); -static void sbdma_emptyring(struct sbmacdma *d); -static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d); -static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d, - int work_to_do, int poll); -static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d, - int poll); -static int sbmac_initctx(struct sbmac_softc *s); -static void sbmac_channel_start(struct sbmac_softc *s); -static void sbmac_channel_stop(struct sbmac_softc *s); -static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *, - enum sbmac_state); -static void sbmac_promiscuous_mode(struct sbmac_softc *sc, int onoff); -static uint64_t sbmac_addr2reg(unsigned char *ptr); -static irqreturn_t sbmac_intr(int irq, void *dev_instance); -static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev); -static void sbmac_setmulti(struct sbmac_softc *sc); -static int sbmac_init(struct platform_device *pldev, long long base); -static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed); -static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex, - enum sbmac_fc fc); - -static int sbmac_open(struct net_device *dev); -static void sbmac_tx_timeout (struct net_device *dev); -static void sbmac_set_rx_mode(struct net_device *dev); -static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); -static int sbmac_close(struct net_device *dev); -static int sbmac_poll(struct napi_struct *napi, int budget); - -static void sbmac_mii_poll(struct net_device *dev); -static int sbmac_mii_probe(struct net_device *dev); - -static void sbmac_mii_sync(void __iomem *sbm_mdio); -static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data, - int bitcnt); -static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx); -static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx, - u16 val); - - -/********************************************************************** - * Globals - ********************************************************************* */ - -static char sbmac_string[] = "sb1250-mac"; - -static char sbmac_mdio_string[] = "sb1250-mac-mdio"; - - -/********************************************************************** - * MDIO constants - ********************************************************************* */ - -#define MII_COMMAND_START 0x01 -#define MII_COMMAND_READ 0x02 -#define MII_COMMAND_WRITE 0x01 -#define MII_COMMAND_ACK 0x02 - -#define M_MAC_MDIO_DIR_OUTPUT 0 /* for clarity */ - -#define ENABLE 1 -#define DISABLE 0 - -/********************************************************************** - * SBMAC_MII_SYNC(sbm_mdio) - * - * Synchronize with the MII - send a pattern of bits to the MII - * that will guarantee that it is ready to accept a command. - * - * Input parameters: - * sbm_mdio - address of the MAC's MDIO register - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbmac_mii_sync(void __iomem *sbm_mdio) -{ - int cnt; - uint64_t bits; - int mac_mdio_genc; - - mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC; - - bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT; - - __raw_writeq(bits | mac_mdio_genc, sbm_mdio); - - for (cnt = 0; cnt < 32; cnt++) { - __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio); - __raw_writeq(bits | mac_mdio_genc, sbm_mdio); - } -} - -/********************************************************************** - * SBMAC_MII_SENDDATA(sbm_mdio, data, bitcnt) - * - * Send some bits to the MII. The bits to be sent are right- - * justified in the 'data' parameter. - * - * Input parameters: - * sbm_mdio - address of the MAC's MDIO register - * data - data to send - * bitcnt - number of bits to send - ********************************************************************* */ - -static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data, - int bitcnt) -{ - int i; - uint64_t bits; - unsigned int curmask; - int mac_mdio_genc; - - mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC; - - bits = M_MAC_MDIO_DIR_OUTPUT; - __raw_writeq(bits | mac_mdio_genc, sbm_mdio); - - curmask = 1 << (bitcnt - 1); - - for (i = 0; i < bitcnt; i++) { - if (data & curmask) - bits |= M_MAC_MDIO_OUT; - else bits &= ~M_MAC_MDIO_OUT; - __raw_writeq(bits | mac_mdio_genc, sbm_mdio); - __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio); - __raw_writeq(bits | mac_mdio_genc, sbm_mdio); - curmask >>= 1; - } -} - - - -/********************************************************************** - * SBMAC_MII_READ(bus, phyaddr, regidx) - * Read a PHY register. - * - * Input parameters: - * bus - MDIO bus handle - * phyaddr - PHY's address - * regnum - index of register to read - * - * Return value: - * value read, or 0xffff if an error occurred. - ********************************************************************* */ - -static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx) -{ - struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv; - void __iomem *sbm_mdio = sc->sbm_mdio; - int idx; - int error; - int regval; - int mac_mdio_genc; - - /* - * Synchronize ourselves so that the PHY knows the next - * thing coming down is a command - */ - sbmac_mii_sync(sbm_mdio); - - /* - * Send the data to the PHY. The sequence is - * a "start" command (2 bits) - * a "read" command (2 bits) - * the PHY addr (5 bits) - * the register index (5 bits) - */ - sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2); - sbmac_mii_senddata(sbm_mdio, MII_COMMAND_READ, 2); - sbmac_mii_senddata(sbm_mdio, phyaddr, 5); - sbmac_mii_senddata(sbm_mdio, regidx, 5); - - mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC; - - /* - * Switch the port around without a clock transition. - */ - __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio); - - /* - * Send out a clock pulse to signal we want the status - */ - __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc, - sbm_mdio); - __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio); - - /* - * If an error occurred, the PHY will signal '1' back - */ - error = __raw_readq(sbm_mdio) & M_MAC_MDIO_IN; - - /* - * Issue an 'idle' clock pulse, but keep the direction - * the same. - */ - __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc, - sbm_mdio); - __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio); - - regval = 0; - - for (idx = 0; idx < 16; idx++) { - regval <<= 1; - - if (error == 0) { - if (__raw_readq(sbm_mdio) & M_MAC_MDIO_IN) - regval |= 1; - } - - __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc, - sbm_mdio); - __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio); - } - - /* Switch back to output */ - __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio); - - if (error == 0) - return regval; - return 0xffff; -} - - -/********************************************************************** - * SBMAC_MII_WRITE(bus, phyaddr, regidx, regval) - * - * Write a value to a PHY register. - * - * Input parameters: - * bus - MDIO bus handle - * phyaddr - PHY to use - * regidx - register within the PHY - * regval - data to write to register - * - * Return value: - * 0 for success - ********************************************************************* */ - -static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx, - u16 regval) -{ - struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv; - void __iomem *sbm_mdio = sc->sbm_mdio; - int mac_mdio_genc; - - sbmac_mii_sync(sbm_mdio); - - sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2); - sbmac_mii_senddata(sbm_mdio, MII_COMMAND_WRITE, 2); - sbmac_mii_senddata(sbm_mdio, phyaddr, 5); - sbmac_mii_senddata(sbm_mdio, regidx, 5); - sbmac_mii_senddata(sbm_mdio, MII_COMMAND_ACK, 2); - sbmac_mii_senddata(sbm_mdio, regval, 16); - - mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC; - - __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio); - - return 0; -} - - - -/********************************************************************** - * SBDMA_INITCTX(d,s,chan,txrx,maxdescr) - * - * Initialize a DMA channel context. Since there are potentially - * eight DMA channels per MAC, it's nice to do this in a standard - * way. - * - * Input parameters: - * d - struct sbmacdma (DMA channel context) - * s - struct sbmac_softc (pointer to a MAC) - * chan - channel number (0..1 right now) - * txrx - Identifies DMA_TX or DMA_RX for channel direction - * maxdescr - number of descriptors - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan, - int txrx, int maxdescr) -{ -#ifdef CONFIG_SBMAC_COALESCE - int int_pktcnt, int_timeout; -#endif - - /* - * Save away interesting stuff in the structure - */ - - d->sbdma_eth = s; - d->sbdma_channel = chan; - d->sbdma_txdir = txrx; - -#if 0 - /* RMON clearing */ - s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING; -#endif - - __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BYTES); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_COLLISIONS); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_LATE_COL); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_EX_COL); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_FCS_ERROR); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_ABORT); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BAD); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_GOOD); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_RUNT); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_OVERSIZE); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BYTES); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_MCAST); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BCAST); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BAD); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_GOOD); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_RUNT); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_OVERSIZE); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_FCS_ERROR); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_LENGTH_ERROR); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_CODE_ERROR); - __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_ALIGN_ERROR); - - /* - * initialize register pointers - */ - - d->sbdma_config0 = - s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0); - d->sbdma_config1 = - s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1); - d->sbdma_dscrbase = - s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE); - d->sbdma_dscrcnt = - s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT); - d->sbdma_curdscr = - s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR); - if (d->sbdma_txdir) - d->sbdma_oodpktlost = NULL; - else - d->sbdma_oodpktlost = - s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_OODPKTLOST_RX); - - /* - * Allocate memory for the ring - */ - - d->sbdma_maxdescr = maxdescr; - - d->sbdma_dscrtable_unaligned = kcalloc(d->sbdma_maxdescr + 1, - sizeof(*d->sbdma_dscrtable), - GFP_KERNEL); - - /* - * The descriptor table must be aligned to at least 16 bytes or the - * MAC will corrupt it. - */ - d->sbdma_dscrtable = (struct sbdmadscr *) - ALIGN((unsigned long)d->sbdma_dscrtable_unaligned, - sizeof(*d->sbdma_dscrtable)); - - d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr; - - d->sbdma_dscrtable_phys = virt_to_phys(d->sbdma_dscrtable); - - /* - * And context table - */ - - d->sbdma_ctxtable = kcalloc(d->sbdma_maxdescr, - sizeof(*d->sbdma_ctxtable), GFP_KERNEL); - -#ifdef CONFIG_SBMAC_COALESCE - /* - * Setup Rx/Tx DMA coalescing defaults - */ - - int_pktcnt = (txrx == DMA_TX) ? int_pktcnt_tx : int_pktcnt_rx; - if ( int_pktcnt ) { - d->sbdma_int_pktcnt = int_pktcnt; - } else { - d->sbdma_int_pktcnt = 1; - } - - int_timeout = (txrx == DMA_TX) ? int_timeout_tx : int_timeout_rx; - if ( int_timeout ) { - d->sbdma_int_timeout = int_timeout; - } else { - d->sbdma_int_timeout = 0; - } -#endif - -} - -/********************************************************************** - * SBDMA_CHANNEL_START(d) - * - * Initialize the hardware registers for a DMA channel. - * - * Input parameters: - * d - DMA channel to init (context must be previously init'd - * rxtx - DMA_RX or DMA_TX depending on what type of channel - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbdma_channel_start(struct sbmacdma *d, int rxtx) -{ - /* - * Turn on the DMA channel - */ - -#ifdef CONFIG_SBMAC_COALESCE - __raw_writeq(V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) | - 0, d->sbdma_config1); - __raw_writeq(M_DMA_EOP_INT_EN | - V_DMA_RINGSZ(d->sbdma_maxdescr) | - V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) | - 0, d->sbdma_config0); -#else - __raw_writeq(0, d->sbdma_config1); - __raw_writeq(V_DMA_RINGSZ(d->sbdma_maxdescr) | - 0, d->sbdma_config0); -#endif - - __raw_writeq(d->sbdma_dscrtable_phys, d->sbdma_dscrbase); - - /* - * Initialize ring pointers - */ - - d->sbdma_addptr = d->sbdma_dscrtable; - d->sbdma_remptr = d->sbdma_dscrtable; -} - -/********************************************************************** - * SBDMA_CHANNEL_STOP(d) - * - * Initialize the hardware registers for a DMA channel. - * - * Input parameters: - * d - DMA channel to init (context must be previously init'd - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbdma_channel_stop(struct sbmacdma *d) -{ - /* - * Turn off the DMA channel - */ - - __raw_writeq(0, d->sbdma_config1); - - __raw_writeq(0, d->sbdma_dscrbase); - - __raw_writeq(0, d->sbdma_config0); - - /* - * Zero ring pointers - */ - - d->sbdma_addptr = NULL; - d->sbdma_remptr = NULL; -} - -static inline void sbdma_align_skb(struct sk_buff *skb, - unsigned int power2, unsigned int offset) -{ - unsigned char *addr = skb->data; - unsigned char *newaddr = PTR_ALIGN(addr, power2); - - skb_reserve(skb, newaddr - addr + offset); -} - - -/********************************************************************** - * SBDMA_ADD_RCVBUFFER(d,sb) - * - * Add a buffer to the specified DMA channel. For receive channels, - * this queues a buffer for inbound packets. - * - * Input parameters: - * sc - softc structure - * d - DMA channel descriptor - * sb - sk_buff to add, or NULL if we should allocate one - * - * Return value: - * 0 if buffer could not be added (ring is full) - * 1 if buffer added successfully - ********************************************************************* */ - - -static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d, - struct sk_buff *sb) -{ - struct net_device *dev = sc->sbm_dev; - struct sbdmadscr *dsc; - struct sbdmadscr *nextdsc; - struct sk_buff *sb_new = NULL; - int pktsize = ENET_PACKET_SIZE; - - /* get pointer to our current place in the ring */ - - dsc = d->sbdma_addptr; - nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr); - - /* - * figure out if the ring is full - if the next descriptor - * is the same as the one that we're going to remove from - * the ring, the ring is full - */ - - if (nextdsc == d->sbdma_remptr) { - return -ENOSPC; - } - - /* - * Allocate a sk_buff if we don't already have one. - * If we do have an sk_buff, reset it so that it's empty. - * - * Note: sk_buffs don't seem to be guaranteed to have any sort - * of alignment when they are allocated. Therefore, allocate enough - * extra space to make sure that: - * - * 1. the data does not start in the middle of a cache line. - * 2. The data does not end in the middle of a cache line - * 3. The buffer can be aligned such that the IP addresses are - * naturally aligned. - * - * Remember, the SOCs MAC writes whole cache lines at a time, - * without reading the old contents first. So, if the sk_buff's - * data portion starts in the middle of a cache line, the SOC - * DMA will trash the beginning (and ending) portions. - */ - - if (sb == NULL) { - sb_new = netdev_alloc_skb(dev, ENET_PACKET_SIZE + - SMP_CACHE_BYTES * 2 + - NET_IP_ALIGN); - if (sb_new == NULL) { - pr_info("%s: sk_buff allocation failed\n", - d->sbdma_eth->sbm_dev->name); - return -ENOBUFS; - } - - sbdma_align_skb(sb_new, SMP_CACHE_BYTES, NET_IP_ALIGN); - } - else { - sb_new = sb; - /* - * nothing special to reinit buffer, it's already aligned - * and sb->data already points to a good place. - */ - } - - /* - * fill in the descriptor - */ - -#ifdef CONFIG_SBMAC_COALESCE - /* - * Do not interrupt per DMA transfer. - */ - dsc->dscr_a = virt_to_phys(sb_new->data) | - V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) | 0; -#else - dsc->dscr_a = virt_to_phys(sb_new->data) | - V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) | - M_DMA_DSCRA_INTERRUPT; -#endif - - /* receiving: no options */ - dsc->dscr_b = 0; - - /* - * fill in the context - */ - - d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb_new; - - /* - * point at next packet - */ - - d->sbdma_addptr = nextdsc; - - /* - * Give the buffer to the DMA engine. - */ - - __raw_writeq(1, d->sbdma_dscrcnt); - - return 0; /* we did it */ -} - -/********************************************************************** - * SBDMA_ADD_TXBUFFER(d,sb) - * - * Add a transmit buffer to the specified DMA channel, causing a - * transmit to start. - * - * Input parameters: - * d - DMA channel descriptor - * sb - sk_buff to add - * - * Return value: - * 0 transmit queued successfully - * otherwise error code - ********************************************************************* */ - - -static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *sb) -{ - struct sbdmadscr *dsc; - struct sbdmadscr *nextdsc; - uint64_t phys; - uint64_t ncb; - int length; - - /* get pointer to our current place in the ring */ - - dsc = d->sbdma_addptr; - nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr); - - /* - * figure out if the ring is full - if the next descriptor - * is the same as the one that we're going to remove from - * the ring, the ring is full - */ - - if (nextdsc == d->sbdma_remptr) { - return -ENOSPC; - } - - /* - * Under Linux, it's not necessary to copy/coalesce buffers - * like it is on NetBSD. We think they're all contiguous, - * but that may not be true for GBE. - */ - - length = sb->len; - - /* - * fill in the descriptor. Note that the number of cache - * blocks in the descriptor is the number of blocks - * *spanned*, so we need to add in the offset (if any) - * while doing the calculation. - */ - - phys = virt_to_phys(sb->data); - ncb = NUMCACHEBLKS(length+(phys & (SMP_CACHE_BYTES - 1))); - - dsc->dscr_a = phys | - V_DMA_DSCRA_A_SIZE(ncb) | -#ifndef CONFIG_SBMAC_COALESCE - M_DMA_DSCRA_INTERRUPT | -#endif - M_DMA_ETHTX_SOP; - - /* transmitting: set outbound options and length */ - - dsc->dscr_b = V_DMA_DSCRB_OPTIONS(K_DMA_ETHTX_APPENDCRC_APPENDPAD) | - V_DMA_DSCRB_PKT_SIZE(length); - - /* - * fill in the context - */ - - d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb; - - /* - * point at next packet - */ - - d->sbdma_addptr = nextdsc; - - /* - * Give the buffer to the DMA engine. - */ - - __raw_writeq(1, d->sbdma_dscrcnt); - - return 0; /* we did it */ -} - - - - -/********************************************************************** - * SBDMA_EMPTYRING(d) - * - * Free all allocated sk_buffs on the specified DMA channel; - * - * Input parameters: - * d - DMA channel - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbdma_emptyring(struct sbmacdma *d) -{ - int idx; - struct sk_buff *sb; - - for (idx = 0; idx < d->sbdma_maxdescr; idx++) { - sb = d->sbdma_ctxtable[idx]; - if (sb) { - dev_kfree_skb(sb); - d->sbdma_ctxtable[idx] = NULL; - } - } -} - - -/********************************************************************** - * SBDMA_FILLRING(d) - * - * Fill the specified DMA channel (must be receive channel) - * with sk_buffs - * - * Input parameters: - * sc - softc structure - * d - DMA channel - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d) -{ - int idx; - - for (idx = 0; idx < SBMAC_MAX_RXDESCR - 1; idx++) { - if (sbdma_add_rcvbuffer(sc, d, NULL) != 0) - break; - } -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -static void sbmac_netpoll(struct net_device *netdev) -{ - struct sbmac_softc *sc = netdev_priv(netdev); - int irq = sc->sbm_dev->irq; - - __raw_writeq(0, sc->sbm_imr); - - sbmac_intr(irq, netdev); - -#ifdef CONFIG_SBMAC_COALESCE - __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) | - ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), - sc->sbm_imr); -#else - __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) | - (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr); -#endif -} -#endif - -/********************************************************************** - * SBDMA_RX_PROCESS(sc,d,work_to_do,poll) - * - * Process "completed" receive buffers on the specified DMA channel. - * - * Input parameters: - * sc - softc structure - * d - DMA channel context - * work_to_do - no. of packets to process before enabling interrupt - * again (for NAPI) - * poll - 1: using polling (for NAPI) - * - * Return value: - * nothing - ********************************************************************* */ - -static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d, - int work_to_do, int poll) -{ - struct net_device *dev = sc->sbm_dev; - int curidx; - int hwidx; - struct sbdmadscr *dsc; - struct sk_buff *sb; - int len; - int work_done = 0; - int dropped = 0; - - prefetch(d); - -again: - /* Check if the HW dropped any frames */ - dev->stats.rx_fifo_errors - += __raw_readq(sc->sbm_rxdma.sbdma_oodpktlost) & 0xffff; - __raw_writeq(0, sc->sbm_rxdma.sbdma_oodpktlost); - - while (work_to_do-- > 0) { - /* - * figure out where we are (as an index) and where - * the hardware is (also as an index) - * - * This could be done faster if (for example) the - * descriptor table was page-aligned and contiguous in - * both virtual and physical memory -- you could then - * just compare the low-order bits of the virtual address - * (sbdma_remptr) and the physical address (sbdma_curdscr CSR) - */ - - dsc = d->sbdma_remptr; - curidx = dsc - d->sbdma_dscrtable; - - prefetch(dsc); - prefetch(&d->sbdma_ctxtable[curidx]); - - hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) - - d->sbdma_dscrtable_phys) / - sizeof(*d->sbdma_dscrtable); - - /* - * If they're the same, that means we've processed all - * of the descriptors up to (but not including) the one that - * the hardware is working on right now. - */ - - if (curidx == hwidx) - goto done; - - /* - * Otherwise, get the packet's sk_buff ptr back - */ - - sb = d->sbdma_ctxtable[curidx]; - d->sbdma_ctxtable[curidx] = NULL; - - len = (int)G_DMA_DSCRB_PKT_SIZE(dsc->dscr_b) - 4; - - /* - * Check packet status. If good, process it. - * If not, silently drop it and put it back on the - * receive ring. - */ - - if (likely (!(dsc->dscr_a & M_DMA_ETHRX_BAD))) { - - /* - * Add a new buffer to replace the old one. If we fail - * to allocate a buffer, we're going to drop this - * packet and put it right back on the receive ring. - */ - - if (unlikely(sbdma_add_rcvbuffer(sc, d, NULL) == - -ENOBUFS)) { - dev->stats.rx_dropped++; - /* Re-add old buffer */ - sbdma_add_rcvbuffer(sc, d, sb); - /* No point in continuing at the moment */ - printk(KERN_ERR "dropped packet (1)\n"); - d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr); - goto done; - } else { - /* - * Set length into the packet - */ - skb_put(sb,len); - - /* - * Buffer has been replaced on the - * receive ring. Pass the buffer to - * the kernel - */ - sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev); - /* Check hw IPv4/TCP checksum if supported */ - if (sc->rx_hw_checksum == ENABLE) { - if (!((dsc->dscr_a) & M_DMA_ETHRX_BADIP4CS) && - !((dsc->dscr_a) & M_DMA_ETHRX_BADTCPCS)) { - sb->ip_summed = CHECKSUM_UNNECESSARY; - /* don't need to set sb->csum */ - } else { - skb_checksum_none_assert(sb); - } - } - prefetch(sb->data); - prefetch((const void *)(((char *)sb->data)+32)); - if (poll) - dropped = netif_receive_skb(sb); - else - dropped = netif_rx(sb); - - if (dropped == NET_RX_DROP) { - dev->stats.rx_dropped++; - d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr); - goto done; - } - else { - dev->stats.rx_bytes += len; - dev->stats.rx_packets++; - } - } - } else { - /* - * Packet was mangled somehow. Just drop it and - * put it back on the receive ring. - */ - dev->stats.rx_errors++; - sbdma_add_rcvbuffer(sc, d, sb); - } - - - /* - * .. and advance to the next buffer. - */ - - d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr); - work_done++; - } - if (!poll) { - work_to_do = 32; - goto again; /* collect fifo drop statistics again */ - } -done: - return work_done; -} - -/********************************************************************** - * SBDMA_TX_PROCESS(sc,d) - * - * Process "completed" transmit buffers on the specified DMA channel. - * This is normally called within the interrupt service routine. - * Note that this isn't really ideal for priority channels, since - * it processes all of the packets on a given channel before - * returning. - * - * Input parameters: - * sc - softc structure - * d - DMA channel context - * poll - 1: using polling (for NAPI) - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d, - int poll) -{ - struct net_device *dev = sc->sbm_dev; - int curidx; - int hwidx; - struct sbdmadscr *dsc; - struct sk_buff *sb; - unsigned long flags; - int packets_handled = 0; - - spin_lock_irqsave(&(sc->sbm_lock), flags); - - if (d->sbdma_remptr == d->sbdma_addptr) - goto end_unlock; - - hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) - - d->sbdma_dscrtable_phys) / sizeof(*d->sbdma_dscrtable); - - for (;;) { - /* - * figure out where we are (as an index) and where - * the hardware is (also as an index) - * - * This could be done faster if (for example) the - * descriptor table was page-aligned and contiguous in - * both virtual and physical memory -- you could then - * just compare the low-order bits of the virtual address - * (sbdma_remptr) and the physical address (sbdma_curdscr CSR) - */ - - curidx = d->sbdma_remptr - d->sbdma_dscrtable; - - /* - * If they're the same, that means we've processed all - * of the descriptors up to (but not including) the one that - * the hardware is working on right now. - */ - - if (curidx == hwidx) - break; - - /* - * Otherwise, get the packet's sk_buff ptr back - */ - - dsc = &(d->sbdma_dscrtable[curidx]); - sb = d->sbdma_ctxtable[curidx]; - d->sbdma_ctxtable[curidx] = NULL; - - /* - * Stats - */ - - dev->stats.tx_bytes += sb->len; - dev->stats.tx_packets++; - - /* - * for transmits, we just free buffers. - */ - - dev_kfree_skb_irq(sb); - - /* - * .. and advance to the next buffer. - */ - - d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr); - - packets_handled++; - - } - - /* - * Decide if we should wake up the protocol or not. - * Other drivers seem to do this when we reach a low - * watermark on the transmit queue. - */ - - if (packets_handled) - netif_wake_queue(d->sbdma_eth->sbm_dev); - -end_unlock: - spin_unlock_irqrestore(&(sc->sbm_lock), flags); - -} - - - -/********************************************************************** - * SBMAC_INITCTX(s) - * - * Initialize an Ethernet context structure - this is called - * once per MAC on the 1250. Memory is allocated here, so don't - * call it again from inside the ioctl routines that bring the - * interface up/down - * - * Input parameters: - * s - sbmac context structure - * - * Return value: - * 0 - ********************************************************************* */ - -static int sbmac_initctx(struct sbmac_softc *s) -{ - - /* - * figure out the addresses of some ports - */ - - s->sbm_macenable = s->sbm_base + R_MAC_ENABLE; - s->sbm_maccfg = s->sbm_base + R_MAC_CFG; - s->sbm_fifocfg = s->sbm_base + R_MAC_THRSH_CFG; - s->sbm_framecfg = s->sbm_base + R_MAC_FRAMECFG; - s->sbm_rxfilter = s->sbm_base + R_MAC_ADFILTER_CFG; - s->sbm_isr = s->sbm_base + R_MAC_STATUS; - s->sbm_imr = s->sbm_base + R_MAC_INT_MASK; - s->sbm_mdio = s->sbm_base + R_MAC_MDIO; - - /* - * Initialize the DMA channels. Right now, only one per MAC is used - * Note: Only do this _once_, as it allocates memory from the kernel! - */ - - sbdma_initctx(&(s->sbm_txdma),s,0,DMA_TX,SBMAC_MAX_TXDESCR); - sbdma_initctx(&(s->sbm_rxdma),s,0,DMA_RX,SBMAC_MAX_RXDESCR); - - /* - * initial state is OFF - */ - - s->sbm_state = sbmac_state_off; - - return 0; -} - - -static void sbdma_uninitctx(struct sbmacdma *d) -{ - if (d->sbdma_dscrtable_unaligned) { - kfree(d->sbdma_dscrtable_unaligned); - d->sbdma_dscrtable_unaligned = d->sbdma_dscrtable = NULL; - } - - if (d->sbdma_ctxtable) { - kfree(d->sbdma_ctxtable); - d->sbdma_ctxtable = NULL; - } -} - - -static void sbmac_uninitctx(struct sbmac_softc *sc) -{ - sbdma_uninitctx(&(sc->sbm_txdma)); - sbdma_uninitctx(&(sc->sbm_rxdma)); -} - - -/********************************************************************** - * SBMAC_CHANNEL_START(s) - * - * Start packet processing on this MAC. - * - * Input parameters: - * s - sbmac structure - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbmac_channel_start(struct sbmac_softc *s) -{ - uint64_t reg; - void __iomem *port; - uint64_t cfg,fifo,framecfg; - int idx, th_value; - - /* - * Don't do this if running - */ - - if (s->sbm_state == sbmac_state_on) - return; - - /* - * Bring the controller out of reset, but leave it off. - */ - - __raw_writeq(0, s->sbm_macenable); - - /* - * Ignore all received packets - */ - - __raw_writeq(0, s->sbm_rxfilter); - - /* - * Calculate values for various control registers. - */ - - cfg = M_MAC_RETRY_EN | - M_MAC_TX_HOLD_SOP_EN | - V_MAC_TX_PAUSE_CNT_16K | - M_MAC_AP_STAT_EN | - M_MAC_FAST_SYNC | - M_MAC_SS_EN | - 0; - - /* - * Be sure that RD_THRSH+WR_THRSH <= 32 for pass1 pars - * and make sure that RD_THRSH + WR_THRSH <=128 for pass2 and above - * Use a larger RD_THRSH for gigabit - */ - if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2) - th_value = 28; - else - th_value = 64; - - fifo = V_MAC_TX_WR_THRSH(4) | /* Must be '4' or '8' */ - ((s->sbm_speed == sbmac_speed_1000) - ? V_MAC_TX_RD_THRSH(th_value) : V_MAC_TX_RD_THRSH(4)) | - V_MAC_TX_RL_THRSH(4) | - V_MAC_RX_PL_THRSH(4) | - V_MAC_RX_RD_THRSH(4) | /* Must be '4' */ - V_MAC_RX_RL_THRSH(8) | - 0; - - framecfg = V_MAC_MIN_FRAMESZ_DEFAULT | - V_MAC_MAX_FRAMESZ_DEFAULT | - V_MAC_BACKOFF_SEL(1); - - /* - * Clear out the hash address map - */ - - port = s->sbm_base + R_MAC_HASH_BASE; - for (idx = 0; idx < MAC_HASH_COUNT; idx++) { - __raw_writeq(0, port); - port += sizeof(uint64_t); - } - - /* - * Clear out the exact-match table - */ - - port = s->sbm_base + R_MAC_ADDR_BASE; - for (idx = 0; idx < MAC_ADDR_COUNT; idx++) { - __raw_writeq(0, port); - port += sizeof(uint64_t); - } - - /* - * Clear out the DMA Channel mapping table registers - */ - - port = s->sbm_base + R_MAC_CHUP0_BASE; - for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) { - __raw_writeq(0, port); - port += sizeof(uint64_t); - } - - - port = s->sbm_base + R_MAC_CHLO0_BASE; - for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) { - __raw_writeq(0, port); - port += sizeof(uint64_t); - } - - /* - * Program the hardware address. It goes into the hardware-address - * register as well as the first filter register. - */ - - reg = sbmac_addr2reg(s->sbm_hwaddr); - - port = s->sbm_base + R_MAC_ADDR_BASE; - __raw_writeq(reg, port); - port = s->sbm_base + R_MAC_ETHERNET_ADDR; - -#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS - /* - * Pass1 SOCs do not receive packets addressed to the - * destination address in the R_MAC_ETHERNET_ADDR register. - * Set the value to zero. - */ - __raw_writeq(0, port); -#else - __raw_writeq(reg, port); -#endif - - /* - * Set the receive filter for no packets, and write values - * to the various config registers - */ - - __raw_writeq(0, s->sbm_rxfilter); - __raw_writeq(0, s->sbm_imr); - __raw_writeq(framecfg, s->sbm_framecfg); - __raw_writeq(fifo, s->sbm_fifocfg); - __raw_writeq(cfg, s->sbm_maccfg); - - /* - * Initialize DMA channels (rings should be ok now) - */ - - sbdma_channel_start(&(s->sbm_rxdma), DMA_RX); - sbdma_channel_start(&(s->sbm_txdma), DMA_TX); - - /* - * Configure the speed, duplex, and flow control - */ - - sbmac_set_speed(s,s->sbm_speed); - sbmac_set_duplex(s,s->sbm_duplex,s->sbm_fc); - - /* - * Fill the receive ring - */ - - sbdma_fillring(s, &(s->sbm_rxdma)); - - /* - * Turn on the rest of the bits in the enable register - */ - -#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) - __raw_writeq(M_MAC_RXDMA_EN0 | - M_MAC_TXDMA_EN0, s->sbm_macenable); -#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) - __raw_writeq(M_MAC_RXDMA_EN0 | - M_MAC_TXDMA_EN0 | - M_MAC_RX_ENABLE | - M_MAC_TX_ENABLE, s->sbm_macenable); -#else -#error invalid SiByte MAC configuration -#endif - -#ifdef CONFIG_SBMAC_COALESCE - __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) | - ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), s->sbm_imr); -#else - __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) | - (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), s->sbm_imr); -#endif - - /* - * Enable receiving unicasts and broadcasts - */ - - __raw_writeq(M_MAC_UCAST_EN | M_MAC_BCAST_EN, s->sbm_rxfilter); - - /* - * we're running now. - */ - - s->sbm_state = sbmac_state_on; - - /* - * Program multicast addresses - */ - - sbmac_setmulti(s); - - /* - * If channel was in promiscuous mode before, turn that on - */ - - if (s->sbm_devflags & IFF_PROMISC) { - sbmac_promiscuous_mode(s,1); - } - -} - - -/********************************************************************** - * SBMAC_CHANNEL_STOP(s) - * - * Stop packet processing on this MAC. - * - * Input parameters: - * s - sbmac structure - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbmac_channel_stop(struct sbmac_softc *s) -{ - /* don't do this if already stopped */ - - if (s->sbm_state == sbmac_state_off) - return; - - /* don't accept any packets, disable all interrupts */ - - __raw_writeq(0, s->sbm_rxfilter); - __raw_writeq(0, s->sbm_imr); - - /* Turn off ticker */ - - /* XXX */ - - /* turn off receiver and transmitter */ - - __raw_writeq(0, s->sbm_macenable); - - /* We're stopped now. */ - - s->sbm_state = sbmac_state_off; - - /* - * Stop DMA channels (rings should be ok now) - */ - - sbdma_channel_stop(&(s->sbm_rxdma)); - sbdma_channel_stop(&(s->sbm_txdma)); - - /* Empty the receive and transmit rings */ - - sbdma_emptyring(&(s->sbm_rxdma)); - sbdma_emptyring(&(s->sbm_txdma)); - -} - -/********************************************************************** - * SBMAC_SET_CHANNEL_STATE(state) - * - * Set the channel's state ON or OFF - * - * Input parameters: - * state - new state - * - * Return value: - * old state - ********************************************************************* */ -static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *sc, - enum sbmac_state state) -{ - enum sbmac_state oldstate = sc->sbm_state; - - /* - * If same as previous state, return - */ - - if (state == oldstate) { - return oldstate; - } - - /* - * If new state is ON, turn channel on - */ - - if (state == sbmac_state_on) { - sbmac_channel_start(sc); - } - else { - sbmac_channel_stop(sc); - } - - /* - * Return previous state - */ - - return oldstate; -} - - -/********************************************************************** - * SBMAC_PROMISCUOUS_MODE(sc,onoff) - * - * Turn on or off promiscuous mode - * - * Input parameters: - * sc - softc - * onoff - 1 to turn on, 0 to turn off - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff) -{ - uint64_t reg; - - if (sc->sbm_state != sbmac_state_on) - return; - - if (onoff) { - reg = __raw_readq(sc->sbm_rxfilter); - reg |= M_MAC_ALLPKT_EN; - __raw_writeq(reg, sc->sbm_rxfilter); - } - else { - reg = __raw_readq(sc->sbm_rxfilter); - reg &= ~M_MAC_ALLPKT_EN; - __raw_writeq(reg, sc->sbm_rxfilter); - } -} - -/********************************************************************** - * SBMAC_SETIPHDR_OFFSET(sc,onoff) - * - * Set the iphdr offset as 15 assuming ethernet encapsulation - * - * Input parameters: - * sc - softc - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbmac_set_iphdr_offset(struct sbmac_softc *sc) -{ - uint64_t reg; - - /* Hard code the off set to 15 for now */ - reg = __raw_readq(sc->sbm_rxfilter); - reg &= ~M_MAC_IPHDR_OFFSET | V_MAC_IPHDR_OFFSET(15); - __raw_writeq(reg, sc->sbm_rxfilter); - - /* BCM1250 pass1 didn't have hardware checksum. Everything - later does. */ - if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2) { - sc->rx_hw_checksum = DISABLE; - } else { - sc->rx_hw_checksum = ENABLE; - } -} - - -/********************************************************************** - * SBMAC_ADDR2REG(ptr) - * - * Convert six bytes into the 64-bit register value that - * we typically write into the SBMAC's address/mcast registers - * - * Input parameters: - * ptr - pointer to 6 bytes - * - * Return value: - * register value - ********************************************************************* */ - -static uint64_t sbmac_addr2reg(unsigned char *ptr) -{ - uint64_t reg = 0; - - ptr += 6; - - reg |= (uint64_t) *(--ptr); - reg <<= 8; - reg |= (uint64_t) *(--ptr); - reg <<= 8; - reg |= (uint64_t) *(--ptr); - reg <<= 8; - reg |= (uint64_t) *(--ptr); - reg <<= 8; - reg |= (uint64_t) *(--ptr); - reg <<= 8; - reg |= (uint64_t) *(--ptr); - - return reg; -} - - -/********************************************************************** - * SBMAC_SET_SPEED(s,speed) - * - * Configure LAN speed for the specified MAC. - * Warning: must be called when MAC is off! - * - * Input parameters: - * s - sbmac structure - * speed - speed to set MAC to (see enum sbmac_speed) - * - * Return value: - * 1 if successful - * 0 indicates invalid parameters - ********************************************************************* */ - -static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed) -{ - uint64_t cfg; - uint64_t framecfg; - - /* - * Save new current values - */ - - s->sbm_speed = speed; - - if (s->sbm_state == sbmac_state_on) - return 0; /* save for next restart */ - - /* - * Read current register values - */ - - cfg = __raw_readq(s->sbm_maccfg); - framecfg = __raw_readq(s->sbm_framecfg); - - /* - * Mask out the stuff we want to change - */ - - cfg &= ~(M_MAC_BURST_EN | M_MAC_SPEED_SEL); - framecfg &= ~(M_MAC_IFG_RX | M_MAC_IFG_TX | M_MAC_IFG_THRSH | - M_MAC_SLOT_SIZE); - - /* - * Now add in the new bits - */ - - switch (speed) { - case sbmac_speed_10: - framecfg |= V_MAC_IFG_RX_10 | - V_MAC_IFG_TX_10 | - K_MAC_IFG_THRSH_10 | - V_MAC_SLOT_SIZE_10; - cfg |= V_MAC_SPEED_SEL_10MBPS; - break; - - case sbmac_speed_100: - framecfg |= V_MAC_IFG_RX_100 | - V_MAC_IFG_TX_100 | - V_MAC_IFG_THRSH_100 | - V_MAC_SLOT_SIZE_100; - cfg |= V_MAC_SPEED_SEL_100MBPS ; - break; - - case sbmac_speed_1000: - framecfg |= V_MAC_IFG_RX_1000 | - V_MAC_IFG_TX_1000 | - V_MAC_IFG_THRSH_1000 | - V_MAC_SLOT_SIZE_1000; - cfg |= V_MAC_SPEED_SEL_1000MBPS | M_MAC_BURST_EN; - break; - - default: - return 0; - } - - /* - * Send the bits back to the hardware - */ - - __raw_writeq(framecfg, s->sbm_framecfg); - __raw_writeq(cfg, s->sbm_maccfg); - - return 1; -} - -/********************************************************************** - * SBMAC_SET_DUPLEX(s,duplex,fc) - * - * Set Ethernet duplex and flow control options for this MAC - * Warning: must be called when MAC is off! - * - * Input parameters: - * s - sbmac structure - * duplex - duplex setting (see enum sbmac_duplex) - * fc - flow control setting (see enum sbmac_fc) - * - * Return value: - * 1 if ok - * 0 if an invalid parameter combination was specified - ********************************************************************* */ - -static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex, - enum sbmac_fc fc) -{ - uint64_t cfg; - - /* - * Save new current values - */ - - s->sbm_duplex = duplex; - s->sbm_fc = fc; - - if (s->sbm_state == sbmac_state_on) - return 0; /* save for next restart */ - - /* - * Read current register values - */ - - cfg = __raw_readq(s->sbm_maccfg); - - /* - * Mask off the stuff we're about to change - */ - - cfg &= ~(M_MAC_FC_SEL | M_MAC_FC_CMD | M_MAC_HDX_EN); - - - switch (duplex) { - case sbmac_duplex_half: - switch (fc) { - case sbmac_fc_disabled: - cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_DISABLED; - break; - - case sbmac_fc_collision: - cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENABLED; - break; - - case sbmac_fc_carrier: - cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENAB_FALSECARR; - break; - - case sbmac_fc_frame: /* not valid in half duplex */ - default: /* invalid selection */ - return 0; - } - break; - - case sbmac_duplex_full: - switch (fc) { - case sbmac_fc_disabled: - cfg |= V_MAC_FC_CMD_DISABLED; - break; - - case sbmac_fc_frame: - cfg |= V_MAC_FC_CMD_ENABLED; - break; - - case sbmac_fc_collision: /* not valid in full duplex */ - case sbmac_fc_carrier: /* not valid in full duplex */ - default: - return 0; - } - break; - default: - return 0; - } - - /* - * Send the bits back to the hardware - */ - - __raw_writeq(cfg, s->sbm_maccfg); - - return 1; -} - - - - -/********************************************************************** - * SBMAC_INTR() - * - * Interrupt handler for MAC interrupts - * - * Input parameters: - * MAC structure - * - * Return value: - * nothing - ********************************************************************* */ -static irqreturn_t sbmac_intr(int irq,void *dev_instance) -{ - struct net_device *dev = (struct net_device *) dev_instance; - struct sbmac_softc *sc = netdev_priv(dev); - uint64_t isr; - int handled = 0; - - /* - * Read the ISR (this clears the bits in the real - * register, except for counter addr) - */ - - isr = __raw_readq(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR; - - if (isr == 0) - return IRQ_RETVAL(0); - handled = 1; - - /* - * Transmits on channel 0 - */ - - if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0)) - sbdma_tx_process(sc,&(sc->sbm_txdma), 0); - - if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) { - if (napi_schedule_prep(&sc->napi)) { - __raw_writeq(0, sc->sbm_imr); - __napi_schedule(&sc->napi); - /* Depend on the exit from poll to reenable intr */ - } - else { - /* may leave some packets behind */ - sbdma_rx_process(sc,&(sc->sbm_rxdma), - SBMAC_MAX_RXDESCR * 2, 0); - } - } - return IRQ_RETVAL(handled); -} - -/********************************************************************** - * SBMAC_START_TX(skb,dev) - * - * Start output on the specified interface. Basically, we - * queue as many buffers as we can until the ring fills up, or - * we run off the end of the queue, whichever comes first. - * - * Input parameters: - * - * - * Return value: - * nothing - ********************************************************************* */ -static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev) -{ - struct sbmac_softc *sc = netdev_priv(dev); - unsigned long flags; - - /* lock eth irq */ - spin_lock_irqsave(&sc->sbm_lock, flags); - - /* - * Put the buffer on the transmit ring. If we - * don't have room, stop the queue. - */ - - if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) { - /* XXX save skb that we could not send */ - netif_stop_queue(dev); - spin_unlock_irqrestore(&sc->sbm_lock, flags); - - return NETDEV_TX_BUSY; - } - - spin_unlock_irqrestore(&sc->sbm_lock, flags); - - return NETDEV_TX_OK; -} - -/********************************************************************** - * SBMAC_SETMULTI(sc) - * - * Reprogram the multicast table into the hardware, given - * the list of multicasts associated with the interface - * structure. - * - * Input parameters: - * sc - softc - * - * Return value: - * nothing - ********************************************************************* */ - -static void sbmac_setmulti(struct sbmac_softc *sc) -{ - uint64_t reg; - void __iomem *port; - int idx; - struct netdev_hw_addr *ha; - struct net_device *dev = sc->sbm_dev; - - /* - * Clear out entire multicast table. We do this by nuking - * the entire hash table and all the direct matches except - * the first one, which is used for our station address - */ - - for (idx = 1; idx < MAC_ADDR_COUNT; idx++) { - port = sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t)); - __raw_writeq(0, port); - } - - for (idx = 0; idx < MAC_HASH_COUNT; idx++) { - port = sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t)); - __raw_writeq(0, port); - } - - /* - * Clear the filter to say we don't want any multicasts. - */ - - reg = __raw_readq(sc->sbm_rxfilter); - reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN); - __raw_writeq(reg, sc->sbm_rxfilter); - - if (dev->flags & IFF_ALLMULTI) { - /* - * Enable ALL multicasts. Do this by inverting the - * multicast enable bit. - */ - reg = __raw_readq(sc->sbm_rxfilter); - reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN); - __raw_writeq(reg, sc->sbm_rxfilter); - return; - } - - - /* - * Progam new multicast entries. For now, only use the - * perfect filter. In the future we'll need to use the - * hash filter if the perfect filter overflows - */ - - /* XXX only using perfect filter for now, need to use hash - * XXX if the table overflows */ - - idx = 1; /* skip station address */ - netdev_for_each_mc_addr(ha, dev) { - if (idx == MAC_ADDR_COUNT) - break; - reg = sbmac_addr2reg(ha->addr); - port = sc->sbm_base + R_MAC_ADDR_BASE+(idx * sizeof(uint64_t)); - __raw_writeq(reg, port); - idx++; - } - - /* - * Enable the "accept multicast bits" if we programmed at least one - * multicast. - */ - - if (idx > 1) { - reg = __raw_readq(sc->sbm_rxfilter); - reg |= M_MAC_MCAST_EN; - __raw_writeq(reg, sc->sbm_rxfilter); - } -} - -static int sb1250_change_mtu(struct net_device *_dev, int new_mtu) -{ - if (new_mtu > ENET_PACKET_SIZE) - return -EINVAL; - _dev->mtu = new_mtu; - pr_info("changing the mtu to %d\n", new_mtu); - return 0; -} - -static const struct net_device_ops sbmac_netdev_ops = { - .ndo_open = sbmac_open, - .ndo_stop = sbmac_close, - .ndo_start_xmit = sbmac_start_tx, - .ndo_set_multicast_list = sbmac_set_rx_mode, - .ndo_tx_timeout = sbmac_tx_timeout, - .ndo_do_ioctl = sbmac_mii_ioctl, - .ndo_change_mtu = sb1250_change_mtu, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = sbmac_netpoll, -#endif -}; - -/********************************************************************** - * SBMAC_INIT(dev) - * - * Attach routine - init hardware and hook ourselves into linux - * - * Input parameters: - * dev - net_device structure - * - * Return value: - * status - ********************************************************************* */ - -static int sbmac_init(struct platform_device *pldev, long long base) -{ - struct net_device *dev = dev_get_drvdata(&pldev->dev); - int idx = pldev->id; - struct sbmac_softc *sc = netdev_priv(dev); - unsigned char *eaddr; - uint64_t ea_reg; - int i; - int err; - - sc->sbm_dev = dev; - sc->sbe_idx = idx; - - eaddr = sc->sbm_hwaddr; - - /* - * Read the ethernet address. The firmware left this programmed - * for us in the ethernet address register for each mac. - */ - - ea_reg = __raw_readq(sc->sbm_base + R_MAC_ETHERNET_ADDR); - __raw_writeq(0, sc->sbm_base + R_MAC_ETHERNET_ADDR); - for (i = 0; i < 6; i++) { - eaddr[i] = (uint8_t) (ea_reg & 0xFF); - ea_reg >>= 8; - } - - for (i = 0; i < 6; i++) { - dev->dev_addr[i] = eaddr[i]; - } - - /* - * Initialize context (get pointers to registers and stuff), then - * allocate the memory for the descriptor tables. - */ - - sbmac_initctx(sc); - - /* - * Set up Linux device callins - */ - - spin_lock_init(&(sc->sbm_lock)); - - dev->netdev_ops = &sbmac_netdev_ops; - dev->watchdog_timeo = TX_TIMEOUT; - - netif_napi_add(dev, &sc->napi, sbmac_poll, 16); - - dev->irq = UNIT_INT(idx); - - /* This is needed for PASS2 for Rx H/W checksum feature */ - sbmac_set_iphdr_offset(sc); - - sc->mii_bus = mdiobus_alloc(); - if (sc->mii_bus == NULL) { - err = -ENOMEM; - goto uninit_ctx; - } - - sc->mii_bus->name = sbmac_mdio_string; - snprintf(sc->mii_bus->id, MII_BUS_ID_SIZE, "%x", idx); - sc->mii_bus->priv = sc; - sc->mii_bus->read = sbmac_mii_read; - sc->mii_bus->write = sbmac_mii_write; - sc->mii_bus->irq = sc->phy_irq; - for (i = 0; i < PHY_MAX_ADDR; ++i) - sc->mii_bus->irq[i] = SBMAC_PHY_INT; - - sc->mii_bus->parent = &pldev->dev; - /* - * Probe PHY address - */ - err = mdiobus_register(sc->mii_bus); - if (err) { - printk(KERN_ERR "%s: unable to register MDIO bus\n", - dev->name); - goto free_mdio; - } - dev_set_drvdata(&pldev->dev, sc->mii_bus); - - err = register_netdev(dev); - if (err) { - printk(KERN_ERR "%s.%d: unable to register netdev\n", - sbmac_string, idx); - goto unreg_mdio; - } - - pr_info("%s.%d: registered as %s\n", sbmac_string, idx, dev->name); - - if (sc->rx_hw_checksum == ENABLE) - pr_info("%s: enabling TCP rcv checksum\n", dev->name); - - /* - * Display Ethernet address (this is called during the config - * process so we need to finish off the config message that - * was being displayed) - */ - pr_info("%s: SiByte Ethernet at 0x%08Lx, address: %pM\n", - dev->name, base, eaddr); - - return 0; -unreg_mdio: - mdiobus_unregister(sc->mii_bus); - dev_set_drvdata(&pldev->dev, NULL); -free_mdio: - mdiobus_free(sc->mii_bus); -uninit_ctx: - sbmac_uninitctx(sc); - return err; -} - - -static int sbmac_open(struct net_device *dev) -{ - struct sbmac_softc *sc = netdev_priv(dev); - int err; - - if (debug > 1) - pr_debug("%s: sbmac_open() irq %d.\n", dev->name, dev->irq); - - /* - * map/route interrupt (clear status first, in case something - * weird is pending; we haven't initialized the mac registers - * yet) - */ - - __raw_readq(sc->sbm_isr); - err = request_irq(dev->irq, sbmac_intr, IRQF_SHARED, dev->name, dev); - if (err) { - printk(KERN_ERR "%s: unable to get IRQ %d\n", dev->name, - dev->irq); - goto out_err; - } - - sc->sbm_speed = sbmac_speed_none; - sc->sbm_duplex = sbmac_duplex_none; - sc->sbm_fc = sbmac_fc_none; - sc->sbm_pause = -1; - sc->sbm_link = 0; - - /* - * Attach to the PHY - */ - err = sbmac_mii_probe(dev); - if (err) - goto out_unregister; - - /* - * Turn on the channel - */ - - sbmac_set_channel_state(sc,sbmac_state_on); - - netif_start_queue(dev); - - sbmac_set_rx_mode(dev); - - phy_start(sc->phy_dev); - - napi_enable(&sc->napi); - - return 0; - -out_unregister: - free_irq(dev->irq, dev); -out_err: - return err; -} - -static int sbmac_mii_probe(struct net_device *dev) -{ - struct sbmac_softc *sc = netdev_priv(dev); - struct phy_device *phy_dev; - int i; - - for (i = 0; i < PHY_MAX_ADDR; i++) { - phy_dev = sc->mii_bus->phy_map[i]; - if (phy_dev) - break; - } - if (!phy_dev) { - printk(KERN_ERR "%s: no PHY found\n", dev->name); - return -ENXIO; - } - - phy_dev = phy_connect(dev, dev_name(&phy_dev->dev), &sbmac_mii_poll, 0, - PHY_INTERFACE_MODE_GMII); - if (IS_ERR(phy_dev)) { - printk(KERN_ERR "%s: could not attach to PHY\n", dev->name); - return PTR_ERR(phy_dev); - } - - /* Remove any features not supported by the controller */ - phy_dev->supported &= SUPPORTED_10baseT_Half | - SUPPORTED_10baseT_Full | - SUPPORTED_100baseT_Half | - SUPPORTED_100baseT_Full | - SUPPORTED_1000baseT_Half | - SUPPORTED_1000baseT_Full | - SUPPORTED_Autoneg | - SUPPORTED_MII | - SUPPORTED_Pause | - SUPPORTED_Asym_Pause; - phy_dev->advertising = phy_dev->supported; - - pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", - dev->name, phy_dev->drv->name, - dev_name(&phy_dev->dev), phy_dev->irq); - - sc->phy_dev = phy_dev; - - return 0; -} - - -static void sbmac_mii_poll(struct net_device *dev) -{ - struct sbmac_softc *sc = netdev_priv(dev); - struct phy_device *phy_dev = sc->phy_dev; - unsigned long flags; - enum sbmac_fc fc; - int link_chg, speed_chg, duplex_chg, pause_chg, fc_chg; - - link_chg = (sc->sbm_link != phy_dev->link); - speed_chg = (sc->sbm_speed != phy_dev->speed); - duplex_chg = (sc->sbm_duplex != phy_dev->duplex); - pause_chg = (sc->sbm_pause != phy_dev->pause); - - if (!link_chg && !speed_chg && !duplex_chg && !pause_chg) - return; /* Hmmm... */ - - if (!phy_dev->link) { - if (link_chg) { - sc->sbm_link = phy_dev->link; - sc->sbm_speed = sbmac_speed_none; - sc->sbm_duplex = sbmac_duplex_none; - sc->sbm_fc = sbmac_fc_disabled; - sc->sbm_pause = -1; - pr_info("%s: link unavailable\n", dev->name); - } - return; - } - - if (phy_dev->duplex == DUPLEX_FULL) { - if (phy_dev->pause) - fc = sbmac_fc_frame; - else - fc = sbmac_fc_disabled; - } else - fc = sbmac_fc_collision; - fc_chg = (sc->sbm_fc != fc); - - pr_info("%s: link available: %dbase-%cD\n", dev->name, phy_dev->speed, - phy_dev->duplex == DUPLEX_FULL ? 'F' : 'H'); - - spin_lock_irqsave(&sc->sbm_lock, flags); - - sc->sbm_speed = phy_dev->speed; - sc->sbm_duplex = phy_dev->duplex; - sc->sbm_fc = fc; - sc->sbm_pause = phy_dev->pause; - sc->sbm_link = phy_dev->link; - - if ((speed_chg || duplex_chg || fc_chg) && - sc->sbm_state != sbmac_state_off) { - /* - * something changed, restart the channel - */ - if (debug > 1) - pr_debug("%s: restarting channel " - "because PHY state changed\n", dev->name); - sbmac_channel_stop(sc); - sbmac_channel_start(sc); - } - - spin_unlock_irqrestore(&sc->sbm_lock, flags); -} - - -static void sbmac_tx_timeout (struct net_device *dev) -{ - struct sbmac_softc *sc = netdev_priv(dev); - unsigned long flags; - - spin_lock_irqsave(&sc->sbm_lock, flags); - - - dev->trans_start = jiffies; /* prevent tx timeout */ - dev->stats.tx_errors++; - - spin_unlock_irqrestore(&sc->sbm_lock, flags); - - printk (KERN_WARNING "%s: Transmit timed out\n",dev->name); -} - - - - -static void sbmac_set_rx_mode(struct net_device *dev) -{ - unsigned long flags; - struct sbmac_softc *sc = netdev_priv(dev); - - spin_lock_irqsave(&sc->sbm_lock, flags); - if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) { - /* - * Promiscuous changed. - */ - - if (dev->flags & IFF_PROMISC) { - sbmac_promiscuous_mode(sc,1); - } - else { - sbmac_promiscuous_mode(sc,0); - } - } - spin_unlock_irqrestore(&sc->sbm_lock, flags); - - /* - * Program the multicasts. Do this every time. - */ - - sbmac_setmulti(sc); - -} - -static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) -{ - struct sbmac_softc *sc = netdev_priv(dev); - - if (!netif_running(dev) || !sc->phy_dev) - return -EINVAL; - - return phy_mii_ioctl(sc->phy_dev, rq, cmd); -} - -static int sbmac_close(struct net_device *dev) -{ - struct sbmac_softc *sc = netdev_priv(dev); - - napi_disable(&sc->napi); - - phy_stop(sc->phy_dev); - - sbmac_set_channel_state(sc, sbmac_state_off); - - netif_stop_queue(dev); - - if (debug > 1) - pr_debug("%s: Shutting down ethercard\n", dev->name); - - phy_disconnect(sc->phy_dev); - sc->phy_dev = NULL; - free_irq(dev->irq, dev); - - sbdma_emptyring(&(sc->sbm_txdma)); - sbdma_emptyring(&(sc->sbm_rxdma)); - - return 0; -} - -static int sbmac_poll(struct napi_struct *napi, int budget) -{ - struct sbmac_softc *sc = container_of(napi, struct sbmac_softc, napi); - int work_done; - - work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), budget, 1); - sbdma_tx_process(sc, &(sc->sbm_txdma), 1); - - if (work_done < budget) { - napi_complete(napi); - -#ifdef CONFIG_SBMAC_COALESCE - __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) | - ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), - sc->sbm_imr); -#else - __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) | - (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr); -#endif - } - - return work_done; -} - - -static int __devinit sbmac_probe(struct platform_device *pldev) -{ - struct net_device *dev; - struct sbmac_softc *sc; - void __iomem *sbm_base; - struct resource *res; - u64 sbmac_orig_hwaddr; - int err; - - res = platform_get_resource(pldev, IORESOURCE_MEM, 0); - BUG_ON(!res); - sbm_base = ioremap_nocache(res->start, resource_size(res)); - if (!sbm_base) { - printk(KERN_ERR "%s: unable to map device registers\n", - dev_name(&pldev->dev)); - err = -ENOMEM; - goto out_out; - } - - /* - * The R_MAC_ETHERNET_ADDR register will be set to some nonzero - * value for us by the firmware if we're going to use this MAC. - * If we find a zero, skip this MAC. - */ - sbmac_orig_hwaddr = __raw_readq(sbm_base + R_MAC_ETHERNET_ADDR); - pr_debug("%s: %sconfiguring MAC at 0x%08Lx\n", dev_name(&pldev->dev), - sbmac_orig_hwaddr ? "" : "not ", (long long)res->start); - if (sbmac_orig_hwaddr == 0) { - err = 0; - goto out_unmap; - } - - /* - * Okay, cool. Initialize this MAC. - */ - dev = alloc_etherdev(sizeof(struct sbmac_softc)); - if (!dev) { - printk(KERN_ERR "%s: unable to allocate etherdev\n", - dev_name(&pldev->dev)); - err = -ENOMEM; - goto out_unmap; - } - - dev_set_drvdata(&pldev->dev, dev); - SET_NETDEV_DEV(dev, &pldev->dev); - - sc = netdev_priv(dev); - sc->sbm_base = sbm_base; - - err = sbmac_init(pldev, res->start); - if (err) - goto out_kfree; - - return 0; - -out_kfree: - free_netdev(dev); - __raw_writeq(sbmac_orig_hwaddr, sbm_base + R_MAC_ETHERNET_ADDR); - -out_unmap: - iounmap(sbm_base); - -out_out: - return err; -} - -static int __exit sbmac_remove(struct platform_device *pldev) -{ - struct net_device *dev = dev_get_drvdata(&pldev->dev); - struct sbmac_softc *sc = netdev_priv(dev); - - unregister_netdev(dev); - sbmac_uninitctx(sc); - mdiobus_unregister(sc->mii_bus); - mdiobus_free(sc->mii_bus); - iounmap(sc->sbm_base); - free_netdev(dev); - - return 0; -} - -static struct platform_driver sbmac_driver = { - .probe = sbmac_probe, - .remove = __exit_p(sbmac_remove), - .driver = { - .name = sbmac_string, - .owner = THIS_MODULE, - }, -}; - -static int __init sbmac_init_module(void) -{ - return platform_driver_register(&sbmac_driver); -} - -static void __exit sbmac_cleanup_module(void) -{ - platform_driver_unregister(&sbmac_driver); -} - -module_init(sbmac_init_module); -module_exit(sbmac_cleanup_module); |