sb1250-mac.c
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- /*
- * Copyright (C) 2001 Broadcom Corporation
- *
- * 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 BCM12500 SOC chip's built-in
- Ethernet controllers.
-
- The author may be reached as mpl@broadcom.com
- */
- #define CONFIG_SBMAC_COALESCE
- /* A few user-configurable values.
- These may be modified when a driver module is loaded. */
- static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
- /* Used to pass the media type, etc.
- Both 'options[]' and 'full_duplex[]' should exist for driver
- interoperability.
- The media type is usually passed in 'options[]'.
- */
- #define MAX_UNITS 3 /* More are supported, limit only on options */
- #ifdef MODULE
- static int options[MAX_UNITS] = {-1, -1, -1};
- static int full_duplex[MAX_UNITS] = {-1, -1, -1};
- #endif
- static int int_pktcnt = 0;
- static int int_timeout = 0;
- /* Operational parameters that usually are not changed. */
- /* Time in jiffies before concluding the transmitter is hung. */
- #define TX_TIMEOUT (2*HZ)
- #if !defined(__OPTIMIZE__) || !defined(__KERNEL__)
- #warning You must compile this file with the correct options!
- #warning See the last lines of the source file.
- #error You must compile this driver with "-O".
- #endif
- #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/config.h>
- #include <asm/processor.h> /* Processor type for cache alignment. */
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/sibyte/sb1250.h>
- #include <asm/sibyte/64bit.h>
- /* This is only here until the firmware is ready. In that case,
- the firmware leaves the ethernet address in the register for us. */
- #ifdef CONFIG_SIBYTE_STANDALONE
- #define SBMAC_ETH0_HWADDR "40:00:00:00:01:00"
- #define SBMAC_ETH1_HWADDR "40:00:00:00:01:01"
- #define SBMAC_ETH2_HWADDR "40:00:00:00:01:02"
- #endif
- /* These identify the driver base version and may not be removed. */
- #if 0
- static char version1[] __devinitdata =
- "sb1250-mac.c:1.00 1/11/2001 Written by Mitch Lichtenberg (mpl@broadcom.com)n";
- #endif
- MODULE_AUTHOR("Mitch Lichtenberg (mpl@broadcom.com)");
- MODULE_DESCRIPTION("Broadcom BCM12500 SOC GB Ethernet driver");
- MODULE_PARM(debug, "i");
- MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_PARM(int_pktcnt, "i");
- MODULE_PARM(int_timeout, "i");
- #include <asm/sibyte/sb1250_defs.h>
- #include <asm/sibyte/sb1250_regs.h>
- #include <asm/sibyte/sb1250_mac.h>
- #include <asm/sibyte/sb1250_dma.h>
- #include <asm/sibyte/sb1250_int.h>
- #include <asm/sibyte/sb1250_scd.h> /* Only to check SOC part number. */
- /**********************************************************************
- * Simple types
- ********************************************************************* */
- typedef unsigned long sbmac_port_t;
- typedef uint64_t sbmac_physaddr_t;
- typedef uint64_t sbmac_enetaddr_t;
- typedef enum { sbmac_speed_auto, sbmac_speed_10,
- sbmac_speed_100, sbmac_speed_1000 } sbmac_speed_t;
- typedef enum { sbmac_duplex_auto, sbmac_duplex_half,
- sbmac_duplex_full } sbmac_duplex_t;
- typedef enum { sbmac_fc_auto, sbmac_fc_disabled, sbmac_fc_frame,
- sbmac_fc_collision, sbmac_fc_carrier } sbmac_fc_t;
- typedef enum { sbmac_state_uninit, sbmac_state_off, sbmac_state_on,
- sbmac_state_broken } sbmac_state_t;
- /**********************************************************************
- * Macros
- ********************************************************************* */
- #define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ?
- (d)->sbdma_dscrtable : (d)->f+1)
- #define CACHELINESIZE 32
- #define NUMCACHEBLKS(x) (((x)+CACHELINESIZE-1)/CACHELINESIZE)
- #define KMALLOC(x) kmalloc((x),GFP_KERNEL)
- #define KFREE(x) kfree(x)
- #define KVTOPHYS(x) virt_to_bus((void *)(x))
-
- #define SBMAC_READCSR(t) (in64((unsigned long)(t)))
- #define SBMAC_WRITECSR(t,v) (out64(v, (unsigned long)(t)))
- #define PKSEG1(x) ((sbmac_port_t) KSEG1ADDR(x))
- #define SBMAC_MAX_TXDESCR 32
- #define SBMAC_MAX_RXDESCR 32
- #define ETHER_ALIGN 2
- #define ETHER_ADDR_LEN 6
- #define ENET_PACKET_SIZE 1518
- /*#define ENET_PACKET_SIZE 9216 */
- /**********************************************************************
- * DMA Descriptor structure
- ********************************************************************* */
- typedef struct sbdmadscr_s {
- uint64_t dscr_a;
- uint64_t dscr_b;
- } sbdmadscr_t;
- typedef unsigned long paddr_t;
- typedef unsigned long vaddr_t;
- /**********************************************************************
- * DMA Controller structure
- ********************************************************************* */
- typedef struct sbmacdma_s {
-
- /*
- * 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 before interrupt*/
- int sbdma_int_timeout; /* # usec rx interrupt */
- #endif
- sbmac_port_t sbdma_config0; /* DMA config register 0 */
- sbmac_port_t sbdma_config1; /* DMA config register 1 */
- sbmac_port_t sbdma_dscrbase; /* Descriptor base address */
- sbmac_port_t sbdma_dscrcnt; /* Descriptor count register */
- sbmac_port_t sbdma_curdscr; /* current descriptor address */
-
- /*
- * This stuff is for maintenance of the ring
- */
-
- sbdmadscr_t *sbdma_dscrtable; /* base of descriptor table */
- sbdmadscr_t *sbdma_dscrtable_end; /* end of descriptor table */
-
- struct sk_buff **sbdma_ctxtable; /* context table, one per descr */
-
- paddr_t sbdma_dscrtable_phys; /* and also the phys addr */
- sbdmadscr_t *sbdma_addptr; /* next dscr for sw to add */
- sbdmadscr_t *sbdma_remptr; /* next dscr for sw to remove */
-
- } sbmacdma_t;
- /**********************************************************************
- * Ethernet softc structure
- ********************************************************************* */
- struct sbmac_softc {
-
- /*
- * Linux-specific things
- */
-
- struct net_device *sbm_dev; /* pointer to linux device */
- spinlock_t sbm_lock; /* spin lock */
- struct timer_list sbm_timer; /* for monitoring MII */
- struct net_device_stats sbm_stats;
- int sbm_devflags; /* current device flags */
- int sbm_phy_oldbmsr;
- int sbm_phy_oldanlpar;
- int sbm_phy_oldk1stsr;
- int sbm_phy_oldlinkstat;
- int sbm_buffersize;
-
- unsigned char sbm_phys[2];
-
- /*
- * Controller-specific things
- */
-
- sbmac_port_t sbm_base; /* MAC's base address */
- sbmac_state_t sbm_state; /* current state */
-
- sbmac_port_t sbm_macenable; /* MAC Enable Register */
- sbmac_port_t sbm_maccfg; /* MAC Configuration Register */
- sbmac_port_t sbm_fifocfg; /* FIFO configuration register */
- sbmac_port_t sbm_framecfg; /* Frame configuration register */
- sbmac_port_t sbm_rxfilter; /* receive filter register */
- sbmac_port_t sbm_isr; /* Interrupt status register */
- sbmac_port_t sbm_imr; /* Interrupt mask register */
- sbmac_port_t sbm_mdio; /* MDIO register */
-
- sbmac_speed_t sbm_speed; /* current speed */
- sbmac_duplex_t sbm_duplex; /* current duplex */
- sbmac_fc_t sbm_fc; /* current flow control setting */
-
- u_char sbm_hwaddr[ETHER_ADDR_LEN];
-
- sbmacdma_t sbm_txdma; /* for now, only use channel 0 */
- sbmacdma_t sbm_rxdma;
- int rx_hw_checksum;
- int sbe_idx;
-
- };
- /**********************************************************************
- * Externs
- ********************************************************************* */
- /**********************************************************************
- * Prototypes
- ********************************************************************* */
- static void sbdma_initctx(sbmacdma_t *d,
- struct sbmac_softc *s,
- int chan,
- int txrx,
- int maxdescr);
- static void sbdma_channel_start(sbmacdma_t *d, int rxtx);
- static int sbdma_add_rcvbuffer(sbmacdma_t *d,struct sk_buff *m);
- static int sbdma_add_txbuffer(sbmacdma_t *d,struct sk_buff *m);
- static void sbdma_emptyring(sbmacdma_t *d);
- static void sbdma_fillring(sbmacdma_t *d);
- static void sbdma_rx_process(struct sbmac_softc *sc,sbmacdma_t *d);
- static void sbdma_tx_process(struct sbmac_softc *sc,sbmacdma_t *d);
- 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 sbmac_state_t sbmac_set_channel_state(struct sbmac_softc *,sbmac_state_t);
- static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff);
- /*static void sbmac_init_and_start(struct sbmac_softc *sc);*/
- static uint64_t sbmac_addr2reg(unsigned char *ptr);
- static void sbmac_intr(int irq,void *dev_instance,struct pt_regs *rgs);
- 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 net_device *dev);
- static int sbmac_set_speed(struct sbmac_softc *s,sbmac_speed_t speed);
- static int sbmac_set_duplex(struct sbmac_softc *s,sbmac_duplex_t duplex,sbmac_fc_t fc);
- static int sbmac_open(struct net_device *dev);
- static void sbmac_timer(unsigned long data);
- static void sbmac_tx_timeout (struct net_device *dev);
- static struct net_device_stats *sbmac_get_stats(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_mii_poll(struct sbmac_softc *s,int noisy);
- static void sbmac_mii_sync(struct sbmac_softc *s);
- static void sbmac_mii_senddata(struct sbmac_softc *s,unsigned int data, int bitcnt);
- static unsigned int sbmac_mii_read(struct sbmac_softc *s,int phyaddr,int regidx);
- static void sbmac_mii_write(struct sbmac_softc *s,int phyaddr,int regidx,
- unsigned int regval);
- /**********************************************************************
- * Globals
- ********************************************************************* */
- static uint64_t sbmac_orig_hwaddr[MAX_UNITS];
- static uint64_t chip_revision;
- /**********************************************************************
- * MDIO constants
- ********************************************************************* */
- #define MII_COMMAND_START 0x01
- #define MII_COMMAND_READ 0x02
- #define MII_COMMAND_WRITE 0x01
- #define MII_COMMAND_ACK 0x02
- #define BMCR_RESET 0x8000
- #define BMCR_LOOPBACK 0x4000
- #define BMCR_SPEED0 0x2000
- #define BMCR_ANENABLE 0x1000
- #define BMCR_POWERDOWN 0x0800
- #define BMCR_ISOLATE 0x0400
- #define BMCR_RESTARTAN 0x0200
- #define BMCR_DUPLEX 0x0100
- #define BMCR_COLTEST 0x0080
- #define BMCR_SPEED1 0x0040
- #define BMCR_SPEED1000 (BMCR_SPEED1)
- #define BMCR_SPEED100 (BMCR_SPEED0)
- #define BMCR_SPEED10 0
- #define BMSR_100BT4 0x8000
- #define BMSR_100BT_FDX 0x4000
- #define BMSR_100BT_HDX 0x2000
- #define BMSR_10BT_FDX 0x1000
- #define BMSR_10BT_HDX 0x0800
- #define BMSR_100BT2_FDX 0x0400
- #define BMSR_100BT2_HDX 0x0200
- #define BMSR_1000BT_XSR 0x0100
- #define BMSR_PRESUP 0x0040
- #define BMSR_ANCOMPLT 0x0020
- #define BMSR_REMFAULT 0x0010
- #define BMSR_AUTONEG 0x0008
- #define BMSR_LINKSTAT 0x0004
- #define BMSR_JABDETECT 0x0002
- #define BMSR_EXTCAPAB 0x0001
- #define PHYIDR1 0x2000
- #define PHYIDR2 0x5C60
- #define ANAR_NP 0x8000
- #define ANAR_RF 0x2000
- #define ANAR_ASYPAUSE 0x0800
- #define ANAR_PAUSE 0x0400
- #define ANAR_T4 0x0200
- #define ANAR_TXFD 0x0100
- #define ANAR_TXHD 0x0080
- #define ANAR_10FD 0x0040
- #define ANAR_10HD 0x0020
- #define ANAR_PSB 0x0001
- #define ANLPAR_NP 0x8000
- #define ANLPAR_ACK 0x4000
- #define ANLPAR_RF 0x2000
- #define ANLPAR_ASYPAUSE 0x0800
- #define ANLPAR_PAUSE 0x0400
- #define ANLPAR_T4 0x0200
- #define ANLPAR_TXFD 0x0100
- #define ANLPAR_TXHD 0x0080
- #define ANLPAR_10FD 0x0040
- #define ANLPAR_10HD 0x0020
- #define ANLPAR_PSB 0x0001 /* 802.3 */
- #define ANER_PDF 0x0010
- #define ANER_LPNPABLE 0x0008
- #define ANER_NPABLE 0x0004
- #define ANER_PAGERX 0x0002
- #define ANER_LPANABLE 0x0001
- #define ANNPTR_NP 0x8000
- #define ANNPTR_MP 0x2000
- #define ANNPTR_ACK2 0x1000
- #define ANNPTR_TOGTX 0x0800
- #define ANNPTR_CODE 0x0008
- #define ANNPRR_NP 0x8000
- #define ANNPRR_MP 0x2000
- #define ANNPRR_ACK3 0x1000
- #define ANNPRR_TOGTX 0x0800
- #define ANNPRR_CODE 0x0008
- #define K1TCR_TESTMODE 0x0000
- #define K1TCR_MSMCE 0x1000
- #define K1TCR_MSCV 0x0800
- #define K1TCR_RPTR 0x0400
- #define K1TCR_1000BT_FDX 0x200
- #define K1TCR_1000BT_HDX 0x100
- #define K1STSR_MSMCFLT 0x8000
- #define K1STSR_MSCFGRES 0x4000
- #define K1STSR_LRSTAT 0x2000
- #define K1STSR_RRSTAT 0x1000
- #define K1STSR_LP1KFD 0x0800
- #define K1STSR_LP1KHD 0x0400
- #define K1STSR_LPASMDIR 0x0200
- #define K1SCR_1KX_FDX 0x8000
- #define K1SCR_1KX_HDX 0x4000
- #define K1SCR_1KT_FDX 0x2000
- #define K1SCR_1KT_HDX 0x1000
- #define STRAP_PHY1 0x0800
- #define STRAP_NCMODE 0x0400
- #define STRAP_MANMSCFG 0x0200
- #define STRAP_ANENABLE 0x0100
- #define STRAP_MSVAL 0x0080
- #define STRAP_1KHDXADV 0x0010
- #define STRAP_1KFDXADV 0x0008
- #define STRAP_100ADV 0x0004
- #define STRAP_SPEEDSEL 0x0000
- #define STRAP_SPEED100 0x0001
- #define PHYSUP_SPEED1000 0x10
- #define PHYSUP_SPEED100 0x08
- #define PHYSUP_SPEED10 0x00
- #define PHYSUP_LINKUP 0x04
- #define PHYSUP_FDX 0x02
- #define MII_BMCR 0x00 /* Basic mode control register (rw) */
- #define MII_BMSR 0x01 /* Basic mode status register (ro) */
- #define MII_K1STSR 0x0A /* 1K Status Register (ro) */
- #define MII_ANLPAR 0x05 /* Autonegotiation lnk partner abilities (rw) */
- #define M_MAC_MDIO_DIR_OUTPUT 0 /* for clarity */
- #define ENABLE 1
- #define DISABLE 0
- /**********************************************************************
- * SBMAC_MII_SYNC(s)
- *
- * 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:
- * s - sbmac structure
- *
- * Return value:
- * nothing
- ********************************************************************* */
- static void sbmac_mii_sync(struct sbmac_softc *s)
- {
- int cnt;
- uint64_t bits;
-
- bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT;
-
- SBMAC_WRITECSR(s->sbm_mdio,bits);
-
- for (cnt = 0; cnt < 32; cnt++) {
- SBMAC_WRITECSR(s->sbm_mdio,bits | M_MAC_MDC);
- SBMAC_WRITECSR(s->sbm_mdio,bits);
- }
- }
- /**********************************************************************
- * SBMAC_MII_SENDDATA(s,data,bitcnt)
- *
- * Send some bits to the MII. The bits to be sent are right-
- * justified in the 'data' parameter.
- *
- * Input parameters:
- * s - sbmac structure
- * data - data to send
- * bitcnt - number of bits to send
- ********************************************************************* */
- static void sbmac_mii_senddata(struct sbmac_softc *s,unsigned int data, int bitcnt)
- {
- int i;
- uint64_t bits;
- unsigned int curmask;
-
- bits = M_MAC_MDIO_DIR_OUTPUT;
- SBMAC_WRITECSR(s->sbm_mdio,bits);
-
- curmask = 1 << (bitcnt - 1);
-
- for (i = 0; i < bitcnt; i++) {
- if (data & curmask) bits |= M_MAC_MDIO_OUT;
- else bits &= ~M_MAC_MDIO_OUT;
- SBMAC_WRITECSR(s->sbm_mdio,bits);
- SBMAC_WRITECSR(s->sbm_mdio,bits | M_MAC_MDC);
- SBMAC_WRITECSR(s->sbm_mdio,bits);
- curmask >>= 1;
- }
- }
- /**********************************************************************
- * SBMAC_MII_READ(s,phyaddr,regidx)
- *
- * Read a PHY register.
- *
- * Input parameters:
- * s - sbmac structure
- * phyaddr - PHY's address
- * regidx = index of register to read
- *
- * Return value:
- * value read, or 0 if an error occured.
- ********************************************************************* */
- static unsigned int sbmac_mii_read(struct sbmac_softc *s,int phyaddr,int regidx)
- {
- int idx;
- int error;
- int regval;
-
- /*
- * Synchronize ourselves so that the PHY knows the next
- * thing coming down is a command
- */
-
- sbmac_mii_sync(s);
-
- /*
- * 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(s,MII_COMMAND_START, 2);
- sbmac_mii_senddata(s,MII_COMMAND_READ, 2);
- sbmac_mii_senddata(s,phyaddr, 5);
- sbmac_mii_senddata(s,regidx, 5);
-
- /*
- * Switch the port around without a clock transition.
- */
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT);
-
- /*
- * Send out a clock pulse to signal we want the status
- */
-
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT | M_MAC_MDC);
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT);
-
- /*
- * If an error occured, the PHY will signal '1' back
- */
- error = SBMAC_READCSR(s->sbm_mdio) & M_MAC_MDIO_IN;
-
- /*
- * Issue an 'idle' clock pulse, but keep the direction
- * the same.
- */
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT | M_MAC_MDC);
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT);
-
- regval = 0;
-
- for (idx = 0; idx < 16; idx++) {
- regval <<= 1;
-
- if (error == 0) {
- if (SBMAC_READCSR(s->sbm_mdio) & M_MAC_MDIO_IN) regval |= 1;
- }
-
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT | M_MAC_MDC);
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT);
- }
-
- /* Switch back to output */
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_OUTPUT);
-
- if (error == 0) return regval;
- return 0;
- }
- /**********************************************************************
- * SBMAC_MII_WRITE(s,phyaddr,regidx,regval)
- *
- * Write a value to a PHY register.
- *
- * Input parameters:
- * s - sbmac structure
- * phyaddr - PHY to use
- * regidx - register within the PHY
- * regval - data to write to register
- *
- * Return value:
- * nothing
- ********************************************************************* */
- static void sbmac_mii_write(struct sbmac_softc *s,int phyaddr,int regidx,
- unsigned int regval)
- {
-
- sbmac_mii_sync(s);
-
- sbmac_mii_senddata(s,MII_COMMAND_START,2);
- sbmac_mii_senddata(s,MII_COMMAND_WRITE,2);
- sbmac_mii_senddata(s,phyaddr, 5);
- sbmac_mii_senddata(s,regidx, 5);
- sbmac_mii_senddata(s,MII_COMMAND_ACK,2);
- sbmac_mii_senddata(s,regval,16);
-
- SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_OUTPUT);
- }
- /**********************************************************************
- * 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 - sbmacdma_t structure (DMA channel context)
- * s - sbmac_softc structure (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(sbmacdma_t *d,
- struct sbmac_softc *s,
- int chan,
- int txrx,
- int maxdescr)
- {
- /*
- * Save away interesting stuff in the structure
- */
-
- d->sbdma_eth = s;
- d->sbdma_channel = chan;
- d->sbdma_txdir = txrx;
-
- /* RMON clearing */
- s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING;
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_BYTES)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_COLLISIONS)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_LATE_COL)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_EX_COL)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_FCS_ERROR)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_ABORT)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_BAD)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_GOOD)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_RUNT)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_OVERSIZE)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BYTES)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_MCAST)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BCAST)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BAD)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_GOOD)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_RUNT)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_OVERSIZE)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_FCS_ERROR)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_LENGTH_ERROR)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_CODE_ERROR)), 0);
- SBMAC_WRITECSR(PKSEG1(
- A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_ALIGN_ERROR)), 0);
- /*
- * initialize register pointers
- */
-
- d->sbdma_config0 =
- PKSEG1(s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0));
- d->sbdma_config1 =
- PKSEG1(s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1));
- d->sbdma_dscrbase =
- PKSEG1(s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE));
- d->sbdma_dscrcnt =
- PKSEG1(s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT));
- d->sbdma_curdscr =
- PKSEG1(s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR));
-
- /*
- * Allocate memory for the ring
- */
-
- d->sbdma_maxdescr = maxdescr;
-
- d->sbdma_dscrtable = (sbdmadscr_t *)
- KMALLOC(d->sbdma_maxdescr*sizeof(sbdmadscr_t));
-
- memset(d->sbdma_dscrtable,0,d->sbdma_maxdescr*sizeof(sbdmadscr_t));
-
- d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr;
-
- d->sbdma_dscrtable_phys = KVTOPHYS(d->sbdma_dscrtable);
-
- /*
- * And context table
- */
-
- d->sbdma_ctxtable = (struct sk_buff **)
- KMALLOC(d->sbdma_maxdescr*sizeof(struct sk_buff *));
-
- memset(d->sbdma_ctxtable,0,d->sbdma_maxdescr*sizeof(struct sk_buff *));
-
- #ifdef CONFIG_SBMAC_COALESCE
- /*
- * Setup Rx DMA coalescing defaults
- */
- if ( txrx == DMA_RX ) {
- if ( int_pktcnt ) {
- d->sbdma_int_pktcnt = int_pktcnt;
- }
- else {
- d->sbdma_int_pktcnt = 1;
- }
- if ( int_timeout ) {
- d->sbdma_int_timeout = int_timeout;
- }
- else {
- d->sbdma_int_timeout = 0;
- }
- }
- else {
- d->sbdma_int_pktcnt = 0;
- 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(sbmacdma_t *d, int rxtx )
- {
- /*
- * Turn on the DMA channel
- */
-
- #ifdef CONFIG_SBMAC_COALESCE
- if (rxtx == DMA_RX) {
- SBMAC_WRITECSR(d->sbdma_config1,
- V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) |
- 0);
- SBMAC_WRITECSR(d->sbdma_config0,
- M_DMA_EOP_INT_EN |
- V_DMA_RINGSZ(d->sbdma_maxdescr) |
- V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) |
- 0);
- }
- else {
- SBMAC_WRITECSR(d->sbdma_config1,0);
- SBMAC_WRITECSR(d->sbdma_config0,
- V_DMA_RINGSZ(d->sbdma_maxdescr) |
- 0);
- }
- #else
- SBMAC_WRITECSR(d->sbdma_config1,0);
- SBMAC_WRITECSR(d->sbdma_config0,
- V_DMA_RINGSZ(d->sbdma_maxdescr) |
- 0);
- #endif
-
- SBMAC_WRITECSR(d->sbdma_dscrbase,d->sbdma_dscrtable_phys);
-
- /*
- * 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(sbmacdma_t *d)
- {
- /*
- * Turn off the DMA channel
- */
-
- SBMAC_WRITECSR(d->sbdma_config1,0);
-
- SBMAC_WRITECSR(d->sbdma_dscrbase,0);
-
- SBMAC_WRITECSR(d->sbdma_config0,0);
-
- /*
- * Zero ring pointers
- */
-
- d->sbdma_addptr = 0;
- d->sbdma_remptr = 0;
- }
- static void sbdma_align_skb(struct sk_buff *skb,int power2,int offset)
- {
- unsigned long addr;
- unsigned long newaddr;
-
- addr = (unsigned long) skb->data;
-
- newaddr = (addr + power2 - 1) & ~(power2 - 1);
-
- 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:
- * 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(sbmacdma_t *d,struct sk_buff *sb)
- {
- sbdmadscr_t *dsc;
- sbdmadscr_t *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 SB1250's 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 SB1250
- * DMA will trash the beginning (and ending) portions.
- */
-
- if (sb == NULL) {
- sb_new = dev_alloc_skb(ENET_PACKET_SIZE + CACHELINESIZE*2 + ETHER_ALIGN);
- if (sb_new == NULL) {
- printk(KERN_INFO "%s: sk_buff allocation failedn",
- d->sbdma_eth->sbm_dev->name);
- return -ENOBUFS;
- }
-
- sbdma_align_skb(sb_new,CACHELINESIZE,ETHER_ALIGN);
-
- /* mark skbuff owned by our device */
- sb_new->dev = d->sbdma_eth->sbm_dev;
- }
- else {
- sb_new = sb;
- /*
- * nothing special to reinit buffer, it's already aligned
- * and sb->tail already points to a good place.
- */
- }
-
- /*
- * fill in the descriptor
- */
-
- #ifdef CONFIG_SBMAC_COALESCE
- /*
- * Do not interrupt per DMA transfer.
- */
- dsc->dscr_a = KVTOPHYS(sb_new->tail) |
- V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize+ETHER_ALIGN)) |
- 0;
- #else
- dsc->dscr_a = KVTOPHYS(sb_new->tail) |
- V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize+ETHER_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.
- */
-
- SBMAC_WRITECSR(d->sbdma_dscrcnt,1);
-
- 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(sbmacdma_t *d,struct sk_buff *sb)
- {
- sbdmadscr_t *dsc;
- sbdmadscr_t *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 = KVTOPHYS(sb->data);
- ncb = NUMCACHEBLKS(length+(phys & (CACHELINESIZE-1)));
-
- dsc->dscr_a = phys |
- V_DMA_DSCRA_A_SIZE(ncb) |
- M_DMA_DSCRA_INTERRUPT |
- 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.
- */
-
- SBMAC_WRITECSR(d->sbdma_dscrcnt,1);
-
- 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(sbmacdma_t *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:
- * d - DMA channel
- *
- * Return value:
- * nothing
- ********************************************************************* */
- static void sbdma_fillring(sbmacdma_t *d)
- {
- int idx;
-
- for (idx = 0; idx < SBMAC_MAX_RXDESCR-1; idx++) {
- if (sbdma_add_rcvbuffer(d,NULL) != 0) break;
- }
- }
- /**********************************************************************
- * SBDMA_RX_PROCESS(sc,d)
- *
- * Process "completed" receive buffers on the specified DMA channel.
- * 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
- *
- * Return value:
- * nothing
- ********************************************************************* */
- static void sbdma_rx_process(struct sbmac_softc *sc,sbmacdma_t *d)
- {
- int curidx;
- int hwidx;
- sbdmadscr_t *dsc;
- struct sk_buff *sb;
- int len;
-
- 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;
- hwidx = (int) (((SBMAC_READCSR(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
- d->sbdma_dscrtable_phys) / sizeof(sbdmadscr_t));
-
- /*
- * 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;
-
- 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 (!(dsc->dscr_a & M_DMA_ETHRX_BAD)) {
-
- /*
- * Set length into the packet
- */
- skb_put(sb,len);
-
- /*
- * 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 (sbdma_add_rcvbuffer(d,NULL) == -ENOBUFS) {
- sbdma_add_rcvbuffer(d,sb); /* re-add old buffer */
- }
- else {
- /*
- * Buffer has been replaced on the receive ring.
- * Pass the buffer to the kernel
- */
- sc->sbm_stats.rx_bytes += len;
- sc->sbm_stats.rx_packets++;
- sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev);
- if (sc->rx_hw_checksum == ENABLE) {
- /* if the ip checksum is good indicate in skb.
- else set CHECKSUM_NONE as device failed to
- checksum the packet */
- if (((dsc->dscr_b) |M_DMA_ETHRX_BADTCPCS) ||
- ((dsc->dscr_a)| M_DMA_ETHRX_BADIP4CS)){
- sb->ip_summed = CHECKSUM_NONE;
- } else {
- printk(KERN_DEBUG "hw checksum fail .n");
- sb->ip_summed = CHECKSUM_UNNECESSARY;
- }
- } /*rx_hw_checksum */
- netif_rx(sb);
- }
- }
- else {
- /*
- * Packet was mangled somehow. Just drop it and
- * put it back on the receive ring.
- */
- sbdma_add_rcvbuffer(d,sb);
- }
-
-
- /*
- * .. and advance to the next buffer.
- */
-
- d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
-
- }
- }
- /**********************************************************************
- * 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
- *
- * Return value:
- * nothing
- ********************************************************************* */
- static void sbdma_tx_process(struct sbmac_softc *sc,sbmacdma_t *d)
- {
- int curidx;
- int hwidx;
- sbdmadscr_t *dsc;
- struct sk_buff *sb;
- unsigned long flags;
- spin_lock_irqsave(&(sc->sbm_lock), flags);
-
- 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;
- {
- /* XXX This is gross, ugly, and only here because justin hacked it
- in to fix a problem without really understanding it.
-
- It seems that, for whatever reason, this routine is invoked immediately upon the enabling of interrupts.
- So then the Read below returns zero, making hwidx a negative number, and anti-hilarity
- ensues.
-
- I'm guessing there's a proper fix involving clearing out interrupt state from old packets
- before enabling interrupts, but I'm not sure.
- Anyways, this hack seems to work, and is Good Enough for 11 PM. :)
-
- -Justin
- */
-
- uint64_t tmp = SBMAC_READCSR(d->sbdma_curdscr);
- if (!tmp) {
- break;
- }
- hwidx = (int) (((tmp & M_DMA_CURDSCR_ADDR) -
- d->sbdma_dscrtable_phys) / sizeof(sbdmadscr_t));
- }
- /*
- * 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
- */
-
- sc->sbm_stats.tx_bytes += sb->len;
- sc->sbm_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);
-
- }
-
- /*
- * 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.
- */
-
- netif_wake_queue(d->sbdma_eth->sbm_dev);
-
- 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 = PKSEG1(s->sbm_base + R_MAC_ENABLE);
- s->sbm_maccfg = PKSEG1(s->sbm_base + R_MAC_CFG);
- s->sbm_fifocfg = PKSEG1(s->sbm_base + R_MAC_THRSH_CFG);
- s->sbm_framecfg = PKSEG1(s->sbm_base + R_MAC_FRAMECFG);
- s->sbm_rxfilter = PKSEG1(s->sbm_base + R_MAC_ADFILTER_CFG);
- s->sbm_isr = PKSEG1(s->sbm_base + R_MAC_STATUS);
- s->sbm_imr = PKSEG1(s->sbm_base + R_MAC_INT_MASK);
- s->sbm_mdio = PKSEG1(s->sbm_base + R_MAC_MDIO);
- s->sbm_phys[0] = 1;
- s->sbm_phys[1] = 0;
- s->sbm_phy_oldbmsr = 0;
- s->sbm_phy_oldanlpar = 0;
- s->sbm_phy_oldk1stsr = 0;
- s->sbm_phy_oldlinkstat = 0;
-
- /*
- * 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;
-
- /*
- * Initial speed is (XXX TEMP) 10MBit/s HDX no FC
- */
-
- s->sbm_speed = sbmac_speed_10;
- s->sbm_duplex = sbmac_duplex_half;
- s->sbm_fc = sbmac_fc_disabled;
-
- return 0;
- }
- static void sbdma_uninitctx(struct sbmacdma_s *d)
- {
- if (d->sbdma_dscrtable) {
- KFREE(d->sbdma_dscrtable);
- 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;
- sbmac_port_t port;
- uint64_t cfg,fifo,framecfg;
- int idx;
-
- /*
- * Don't do this if running
- */
- if (s->sbm_state == sbmac_state_on) return;
-
- /*
- * Bring the controller out of reset, but leave it off.
- */
-
- SBMAC_WRITECSR(s->sbm_macenable,0);
-
- /*
- * Ignore all received packets
- */
-
- SBMAC_WRITECSR(s->sbm_rxfilter,0);
-
- /*
- * 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
- * Use a larger RD_THRSH for gigabit
- */
- fifo = V_MAC_TX_WR_THRSH(4) | /* Must be '4' or '8' */
- ((s->sbm_speed == sbmac_speed_1000)
- ? V_MAC_TX_RD_THRSH(28) : 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_PL_THRSH(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 = PKSEG1(s->sbm_base + R_MAC_HASH_BASE);
- for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
- SBMAC_WRITECSR(port,0);
- port += sizeof(uint64_t);
- }
-
- /*
- * Clear out the exact-match table
- */
-
- port = PKSEG1(s->sbm_base + R_MAC_ADDR_BASE);
- for (idx = 0; idx < MAC_ADDR_COUNT; idx++) {
- SBMAC_WRITECSR(port,0);
- port += sizeof(uint64_t);
- }
-
- /*
- * Clear out the DMA Channel mapping table registers
- */
-
- port = PKSEG1(s->sbm_base + R_MAC_CHUP0_BASE);
- for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
- SBMAC_WRITECSR(port,0);
- port += sizeof(uint64_t);
- }
- port = PKSEG1(s->sbm_base + R_MAC_CHLO0_BASE);
- for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
- SBMAC_WRITECSR(port,0);
- 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 = PKSEG1(s->sbm_base + R_MAC_ADDR_BASE);
- SBMAC_WRITECSR(port,reg);
- port = PKSEG1(s->sbm_base + R_MAC_ETHERNET_ADDR);
- #ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
- /*
- * Pass1 SB1250s do not receive packets addressed to the
- * destination address in the R_MAC_ETHERNET_ADDR register.
- * Set the value to zero.
- */
- SBMAC_WRITECSR(port,0);
- #else
- SBMAC_WRITECSR(port,reg);
- #endif
-
- /*
- * Set the receive filter for no packets, and write values
- * to the various config registers
- */
-
- SBMAC_WRITECSR(s->sbm_rxfilter,0);
- SBMAC_WRITECSR(s->sbm_imr,0);
- SBMAC_WRITECSR(s->sbm_framecfg,framecfg);
- SBMAC_WRITECSR(s->sbm_fifocfg,fifo);
- SBMAC_WRITECSR(s->sbm_maccfg,cfg);
-
- /*
- * 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->sbm_rxdma));
-
- /*
- * Turn on the rest of the bits in the enable register
- */
-
- SBMAC_WRITECSR(s->sbm_macenable,
- M_MAC_RXDMA_EN0 |
- M_MAC_TXDMA_EN0 |
- M_MAC_RX_ENABLE |
- M_MAC_TX_ENABLE);
-
-
- #ifdef CONFIG_SBMAC_COALESCE
- /*
- * Accept any TX interrupt and EOP count/timer RX interrupts on ch 0
- */
- SBMAC_WRITECSR(s->sbm_imr,
- (M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
- ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0));
- #else
- /*
- * Accept any kind of interrupt on TX and RX DMA channel 0
- */
- SBMAC_WRITECSR(s->sbm_imr,
- (M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
- (M_MAC_INT_CHANNEL << S_MAC_RX_CH0));
- #endif
-
- /*
- * Enable receiving unicasts and broadcasts
- */
-
- SBMAC_WRITECSR(s->sbm_rxfilter,M_MAC_UCAST_EN | M_MAC_BCAST_EN);
-
- /*
- * 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 */
-
- SBMAC_WRITECSR(s->sbm_rxfilter,0);
- SBMAC_WRITECSR(s->sbm_imr,0);
-
- /* Turn off ticker */
-
- /* XXX */
-
- /* turn off receiver and transmitter */
-
- SBMAC_WRITECSR(s->sbm_macenable,0);
-
- /* 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 sbmac_state_t sbmac_set_channel_state(struct sbmac_softc *sc,
- sbmac_state_t state)
- {
- sbmac_state_t 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 = SBMAC_READCSR(sc->sbm_rxfilter);
- reg |= M_MAC_ALLPKT_EN;
- SBMAC_WRITECSR(sc->sbm_rxfilter,reg);
- }
- else {
- reg = SBMAC_READCSR(sc->sbm_rxfilter);
- reg &= ~M_MAC_ALLPKT_EN;
- SBMAC_WRITECSR(sc->sbm_rxfilter,reg);
- }
- }
- /**********************************************************************
- * 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;
-
- reg = SBMAC_READCSR(sc->sbm_rxfilter);
- reg &= ~M_MAC_IPHDR_OFFSET;
- /* Hard code the off set to 15 for now */
- reg |= 15 << S_MAC_IPHDR_OFFSET;
- SBMAC_WRITECSR(sc->sbm_rxfilter,reg);
-
- /* read system identification to determine revision */
- if (sb1250_pass >= K_SYS_REVISION_PASS2) {
- printk(KERN_INFO "pass2 - enabling Rx rcv tcp checksumn");
- sc->rx_hw_checksum = ENABLE;
- } else {
- sc->rx_hw_checksum = DISABLE;
- }
- }
- #if 0
- /**********************************************************************
- * SBMAC_INIT_AND_START(sc)
- *
- * Stop the channel and restart it. This is generally used
- * when we have to do something to the channel that requires
- * a swift kick.
- *
- * Input parameters:
- * sc - softc
- ********************************************************************* */
- static void sbmac_init_and_start(struct sbmac_softc *sc)
- {
- unsigned long flags;
-
- spin_lock_irqsave(&(sc->sbm_lock),flags);
-
- sbmac_set_channel_state(sc,sbmac_state_on);
-
- spin_unlock_irqrestore(&(sc->sbm_lock),flags);
- }
- #endif
- /**********************************************************************
- * 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 sbmac_speed_t enum)
- *
- * Return value:
- * 1 if successful
- * 0 indicates invalid parameters
- ********************************************************************* */
- static int sbmac_set_speed(struct sbmac_softc *s,sbmac_speed_t 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 = SBMAC_READCSR(s->sbm_maccfg);
- framecfg = SBMAC_READCSR(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;
-
- case sbmac_speed_auto: /* XXX not implemented */
- /* fall through */
- default:
- return 0;
- }
-
- /*
- * Send the bits back to the hardware
- */
-
- SBMAC_WRITECSR(s->sbm_framecfg,framecfg);
- SBMAC_WRITECSR(s->sbm_maccfg,cfg);
-
- 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 sbmac_duplex_t)
- * fc - flow control setting (see sbmac_fc_t)
- *
- * Return value:
- * 1 if ok
- * 0 if an invalid parameter combination was specified
- ********************************************************************* */
- static int sbmac_set_duplex(struct sbmac_softc *s,sbmac_duplex_t duplex,sbmac_fc_t 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 = SBMAC_READCSR(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_auto: /* XXX not implemented */
- /* fall through */
- 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 */
- case sbmac_fc_auto: /* XXX not implemented */
- /* fall through */
- default:
- return 0;
- }
- break;
- case sbmac_duplex_auto:
- /* XXX not implemented */
- break;
- }
-
- /*
- * Send the bits back to the hardware
- */
-
- SBMAC_WRITECSR(s->sbm_maccfg,cfg);
-
- return 1;
- }
- /**********************************************************************
- * SBMAC_INTR()
- *
- * Interrupt handler for MAC interrupts
- *
- * Input parameters:
- * MAC structure
- *
- * Return value:
- * nothing
- ********************************************************************* */
- static void sbmac_intr(int irq,void *dev_instance,struct pt_regs *rgs)
- {
- struct net_device *dev = (struct net_device *) dev_instance;
- struct sbmac_softc *sc = (struct sbmac_softc *) (dev->priv);
- uint64_t isr;
-
- for (;;) {
-
- /*
- * Read the ISR (this clears the bits in the real
- * register, except for counter addr)
- */
-
- isr = SBMAC_READCSR(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR;
-
- if (isr == 0) break;
-
- /*
- * Transmits on channel 0
- */
-
- if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0)) {
- sbdma_tx_process(sc,&(sc->sbm_txdma));
- }
-
- /*
- * Receives on channel 0
- */
- /*
- * It's important to test all the bits (or at least the
- * EOP_SEEN bit) when deciding to do the RX process
- * particularly when coalescing, to make sure we
- * take care of the following:
- *
- * If you have some packets waiting (have been received
- * but no interrupt) and get a TX interrupt before
- * the RX timer or counter expires, reading the ISR
- * above will clear the timer and counter, and you
- * won't get another interrupt until a packet shows
- * up to start the timer again. Testing
- * EOP_SEEN here takes care of this case.
- * (EOP_SEEN is part of M_MAC_INT_CHANNEL << S_MAC_RX_CH0)
- */
-
-
- if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) {
- sbdma_rx_process(sc,&(sc->sbm_rxdma));
- }
- }
-
- }
- /**********************************************************************
- * 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 = (struct sbmac_softc *)dev->priv;
-
- /* lock eth irq */
- spin_lock_irq (&sc->sbm_lock);
-
- /*
- * 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_irq(&sc->sbm_lock);
- return 1;
- }
-
- dev->trans_start = jiffies;
-
- spin_unlock_irq (&sc->sbm_lock);
-
- return 0;
- }
- /**********************************************************************
- * 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;
- sbmac_port_t port;
- int idx;
- struct dev_mc_list *mclist;
- 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 = PKSEG1(sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t)));
- SBMAC_WRITECSR(port,0);
- }
-
- for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
- port = PKSEG1(sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t)));
- SBMAC_WRITECSR(port,0);
- }
-
- /*
- * Clear the filter to say we don't want any multicasts.
- */
-
- reg = SBMAC_READCSR(sc->sbm_rxfilter);
- reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN);
- SBMAC_WRITECSR(sc->sbm_rxfilter,reg);
-
- if (dev->flags & IFF_ALLMULTI) {
- /*
- * Enable ALL multicasts. Do this by inverting the
- * multicast enable bit.
- */
- reg = SBMAC_READCSR(sc->sbm_rxfilter);
- reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN);
- SBMAC_WRITECSR(sc->sbm_rxfilter,reg);
- 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 */
- mclist = dev->mc_list;
- while (mclist && (idx < MAC_ADDR_COUNT)) {
- reg = sbmac_addr2reg(mclist->dmi_addr);
- port = PKSEG1(sc->sbm_base +
- R_MAC_ADDR_BASE+(idx*sizeof(uint64_t)));
- SBMAC_WRITECSR(port,reg);
- idx++;
- mclist = mclist->next;
- }
-
- /*
- * Enable the "accept multicast bits" if we programmed at least one
- * multicast.
- */
-
- if (idx > 1) {
- reg = SBMAC_READCSR(sc->sbm_rxfilter);
- reg |= M_MAC_MCAST_EN;
- SBMAC_WRITECSR(sc->sbm_rxfilter,reg);
- }
- }
- #if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR)
- /**********************************************************************
- * SBMAC_PARSE_XDIGIT(str)
- *
- * Parse a hex digit, returning its value
- *
- * Input parameters:
- * str - character
- *
- * Return value:
- * hex value, or -1 if invalid
- ********************************************************************* */
- static int sbmac_parse_xdigit(char str)
- {
- int digit;
-
- if ((str >= '0') && (str <= '9')) digit = str - '0';
- else if ((str >= 'a') && (str <= 'f')) digit = str - 'a' + 10;
- else if ((str >= 'A') && (str <= 'F')) digit = str - 'A' + 10;
- else return -1;
-
- return digit;
- }
- /**********************************************************************
- * SBMAC_PARSE_HWADDR(str,hwaddr)
- *
- * Convert a string in the form xx:xx:xx:xx:xx:xx into a 6-byte
- * Ethernet address.
- *
- * Input parameters:
- * str - string
- * hwaddr - pointer to hardware address
- *
- * Return value:
- * 0 if ok, else -1
- ********************************************************************* */
- static int sbmac_parse_hwaddr(char *str,u_char *hwaddr)
- {
- int digit1,digit2;
- int idx = 6;
-
- while (*str && (idx > 0)) {
- digit1 = sbmac_parse_xdigit(*str);
- if (digit1 < 0) return -1;
- str++;
- if (!*str) return -1;
-
- if ((*str == ':') || (*str == '-')) {
- digit2 = digit1;
- digit1 = 0;
- }
- else {
- digit2 = sbmac_parse_xdigit(*str);
- if (digit2 < 0) return -1;
- str++;
- }
-
- *hwaddr++ = (digit1 << 4) | digit2;
- idx--;
-
- if (*str == '-') str++;
- if (*str == ':') str++;
- }
- return 0;
- }
- #endif
- static int sb1250_change_mtu(struct net_device *_dev, int new_mtu)
- {
- if (new_mtu > ENET_PACKET_SIZE)
- return -EINVAL;
- _dev->mtu = new_mtu;
- printk(KERN_INFO "changing the mtu to %dn", new_mtu);
- return 0;
- }
- /**********************************************************************
- * 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 net_device *dev)
- {
- struct sbmac_softc *sc;
- u_char *eaddr;
- uint64_t ea_reg;
- int idx;
-
- sc = (struct sbmac_softc *)dev->priv;
-
- /* Determine controller base address */
-
- sc->sbm_base = (sbmac_port_t) dev->base_addr;
- sc->sbm_dev = dev;
-
- eaddr = sc->sbm_hwaddr;
-
- /*
- * Read the ethernet address. The firwmare left this programmed
- * for us in the ethernet address register for each mac.
- */
-
- ea_reg = SBMAC_READCSR(PKSEG1(sc->sbm_base + R_MAC_ETHERNET_ADDR));
- SBMAC_WRITECSR(PKSEG1(sc->sbm_base + R_MAC_ETHERNET_ADDR), 0);
- for (idx = 0; idx < 6; idx++) {
- eaddr[idx] = (uint8_t) (ea_reg & 0xFF);
- ea_reg >>= 8;
- }
-
-
- for (idx = 0; idx < 6; idx++) {
- dev->dev_addr[idx] = eaddr[idx];
- }
-
-
- /*
- * Init packet size
- */
-
- sc->sbm_buffersize = ENET_PACKET_SIZE + CACHELINESIZE*2 + ETHER_ALIGN;
-
- /*
- * Initialize context (get pointers to registers and stuff), then
- * allocate the memory for the descriptor tables.
- */
-
- sbmac_initctx(sc);
-
-
- /*
- * Display Ethernet address (this is called during the config process
- * so we need to finish off the config message that was being displayed)
- */
- printk(KERN_INFO
- "%s: SB1250 Ethernet at 0x%08lX, address: %02X-%02X-%02X-%02X-%02X-%02Xn",
- dev->name,
- (unsigned long) sc->sbm_base,
- eaddr[0],eaddr[1],eaddr[2],eaddr[3],eaddr[4],eaddr[5]);
-
- /*
- * Set up Linux device callins
- */
-
- spin_lock_init(&(sc->sbm_lock));
-
- ether_setup(dev);
- dev->open = sbmac_open;
- dev->hard_start_xmit = sbmac_start_tx;
- dev->stop = sbmac_close;
- dev->get_stats = sbmac_get_stats;
- dev->set_multicast_list = sbmac_set_rx_mode;
- dev->do_ioctl = sbmac_mii_ioctl;
- dev->tx_timeout = sbmac_tx_timeout;
- dev->watchdog_timeo = TX_TIMEOUT;
- dev->change_mtu = sb1250_change_mtu;
- if (sb1250_pass >= K_SYS_REVISION_PASS3) {
- /* In pass3 we do dumb checksum in TX */
- dev->features |= NETIF_F_IP_CSUM;
- }
- /* This is needed for PASS2 for Rx H/W checksum feature */
- sbmac_set_iphdr_offset( sc);
-
- return 0;
-
- }
- static int sbmac_open(struct net_device *dev)
- {
- struct sbmac_softc *sc = (struct sbmac_softc *)dev->priv;
-
- MOD_INC_USE_COUNT;
- if (debug > 1) {
- printk(KERN_DEBUG "%s: sbmac_open() irq %d.n", dev->name, dev->irq);
- }
-
- /*
- * map/route interrupt
- */
-
- if (request_irq(dev->irq, &sbmac_intr, SA_SHIRQ, dev->name, dev)) {
- MOD_DEC_USE_COUNT;
- return -EBUSY;
- }
-
- /*
- * Configure default speed
- */
- sbmac_mii_poll(sc,1);
-
- /*
- * Turn on the channel
- */
- sbmac_set_channel_state(sc,sbmac_state_on);
-
- /*
- * XXX Station address is in dev->dev_addr
- */
-
- if (dev->if_port == 0)
- dev->if_port = 0;
-
- netif_start_queue(dev);
-
- sbmac_set_rx_mode(dev);
-
- /* Set the timer to check for link beat. */
- init_timer(&sc->sbm_timer);
- sc->sbm_timer.expires = jiffies + 2;
- sc->sbm_timer.data = (unsigned long)dev;
- sc->sbm_timer.function = &sbmac_timer;
- add_timer(&sc->sbm_timer);
-
- return 0;
- }
- static int sbmac_mii_poll(struct sbmac_softc *s,int noisy)
- {
- int bmsr,bmcr,k1stsr,anlpar;
- int chg;
- char buffer[100];
- char *p = buffer;
- /* Read the mode status and mode control registers. */
- bmsr = sbmac_mii_read(s,s->sbm_phys[0],MII_BMSR);
- bmcr = sbmac_mii_read(s,s->sbm_phys[0],MII_BMCR);
- /* get the link partner status */
- anlpar = sbmac_mii_read(s,s->sbm_phys[0],MII_ANLPAR);
- /* if supported, read the 1000baseT register */
- if (bmsr & BMSR_1000BT_XSR) {
- k1stsr = sbmac_mii_read(s,s->sbm_phys[0],MII_K1STSR);
- }
- else {
- k1stsr = 0;
- }
- chg = 0;
- if ((bmsr & BMSR_LINKSTAT) == 0) {
- /*
- * If link status is down, clear out old info so that when
- * it comes back up it will force us to reconfigure speed
- */
- s->sbm_phy_oldbmsr = 0;
- s->sbm_phy_oldanlpar = 0;
- s->sbm_phy_oldk1stsr = 0;
- return 0;
- }
- if ((s->sbm_phy_oldbmsr != bmsr) ||
- (s->sbm_phy_oldanlpar != anlpar) ||
- (s->sbm_phy_oldk1stsr != k1stsr)) {
- if (debug > 1) {
- printk(KERN_DEBUG "%s: bmsr:%x/%x anlpar:%x/%x k1stsr:%x/%xn",
- s->sbm_dev->name,
- s->sbm_phy_oldbmsr,bmsr,
- s->sbm_phy_oldanlpar,anlpar,
- s->sbm_phy_oldk1stsr,k1stsr);
- }
- s->sbm_phy_oldbmsr = bmsr;
- s->sbm_phy_oldanlpar = anlpar;
- s->sbm_phy_oldk1stsr = k1stsr;
- chg = 1;
- }
- if (chg == 0) return 0;
- p += sprintf(p,"Link speed: ");
- if (k1stsr & K1STSR_LP1KFD) {
- s->sbm_speed = sbmac_speed_1000;
- s->sbm_duplex = sbmac_duplex_full;
- s->sbm_fc = sbmac_fc_frame;
- p += sprintf(p,"1000BaseT FDX");
- }
- else if (k1stsr & K1STSR_LP1KHD) {
- s->sbm_speed = sbmac_speed_1000;
- s->sbm_duplex = sbmac_duplex_half;
- s->sbm_fc = sbmac_fc_disabled;
- p += sprintf(p,"1000BaseT HDX");
- }
- else if (anlpar & ANLPAR_TXFD) {
- s->sbm_speed = sbmac_speed_100;
- s->sbm_duplex = sbmac_duplex_full;
- s->sbm_fc = (anlpar & ANLPAR_PAUSE) ? sbmac_fc_frame : sbmac_fc_disabled;
- p += sprintf(p,"100BaseT FDX");
- }
- else if (anlpar & ANLPAR_TXHD) {
- s->sbm_speed = sbmac_speed_100;
- s->sbm_duplex = sbmac_duplex_half;
- s->sbm_fc = sbmac_fc_disabled;
- p += sprintf(p,"100BaseT HDX");
- }
- else if (anlpar & ANLPAR_10FD) {
- s->sbm_speed = sbmac_speed_10;
- s->sbm_duplex = sbmac_duplex_full;
- s->sbm_fc = sbmac_fc_frame;
- p += sprintf(p,"10BaseT FDX");
- }
- else if (anlpar & ANLPAR_10HD) {
- s->sbm_speed = sbmac_speed_10;
- s->sbm_duplex = sbmac_duplex_half;
- s->sbm_fc = sbmac_fc_collision;
- p += sprintf(p,"10BaseT HDX");
- }
- else {
- p += sprintf(p,"Unknown");
- }
- #ifdef CONFIG_NET_SB1250_MAC_QUIET
- noisy = 0;
- #endif
- if (noisy) {
- printk(KERN_INFO "%s: %sn",s->sbm_dev->name,buffer);
- }
- return 1;
- }
- static void sbmac_timer(unsigned long data)
- {
- struct net_device *dev = (struct net_device *)data;
- struct sbmac_softc *sc = (struct sbmac_softc *)dev->priv;
- int next_tick = HZ;
- int mii_status;
- spin_lock_irq (&sc->sbm_lock);
-
- /* make IFF_RUNNING follow the MII status bit "Link established" */
- mii_status = sbmac_mii_read(sc, sc->sbm_phys[0], MII_BMSR);
-
- if ( (mii_status & BMSR_LINKSTAT) != (sc->sbm_phy_oldlinkstat) ) {
- sc->sbm_phy_oldlinkstat = mii_status & BMSR_LINKSTAT;
- if (mii_status & BMSR_LINKSTAT) {
- netif_carrier_on(dev);
- }
- else {
- netif_carrier_off(dev);
- }
- }
-
- /*
- * Poll the PHY to see what speed we should be running at
- */
- if (sbmac_mii_poll(sc,1)) {
- if (sc->sbm_state != sbmac_state_off) {
- /*
- * something changed, restart the channel
- */
- if (debug > 1) {
- printk("%s: restarting channel because speed changedn",
- sc->sbm_dev->name);
- }
- sbmac_channel_stop(sc);
- sbmac_channel_start(sc);
- }
- }
-
- spin_unlock_irq (&sc->sbm_lock);
-
- sc->sbm_timer.expires = jiffies + next_tick;
- add_timer(&sc->sbm_timer);
- }
- static void sbmac_tx_timeout (struct net_device *dev)
- {
- struct sbmac_softc *sc = (struct sbmac_softc *) dev->priv;
-
- spin_lock_irq (&sc->sbm_lock);
-
-
- dev->trans_start = jiffies;
- sc->sbm_stats.tx_errors++;
-
- spin_unlock_irq (&sc->sbm_lock);
- printk (KERN_WARNING "%s: Transmit timed outn",dev->name);
- }
- static struct net_device_stats *sbmac_get_stats(struct net_device *dev)
- {
- struct sbmac_softc *sc = (struct sbmac_softc *)dev->priv;
- unsigned long flags;
-
- spin_lock_irqsave(&sc->sbm_lock, flags);
-
- /* XXX update other stats here */
-
- spin_unlock_irqrestore(&sc->sbm_lock, flags);
-
- return &sc->sbm_stats;
- }
- static void sbmac_set_rx_mode(struct net_device *dev)
- {
- unsigned long flags;
- int msg_flag = 0;
- struct sbmac_softc *sc = (struct sbmac_softc *)dev->priv;
- spin_lock_irqsave(&sc->sbm_lock, flags);
- if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) {
- /*
- * Promiscuous changed.
- */
-
- if (dev->flags & IFF_PROMISC) {
- /* Unconditionally log net taps. */
- msg_flag = 1;
- sbmac_promiscuous_mode(sc,1);
- }
- else {
- msg_flag = 2;
- sbmac_promiscuous_mode(sc,0);
- }
- }
- spin_unlock_irqrestore(&sc->sbm_lock, flags);
-
- if (msg_flag) {
- printk(KERN_NOTICE "%s: Promiscuous mode %sabled.n", dev->name,(msg_flag==1)?"en":"dis");
- }
-
- /*
- * 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 = (struct sbmac_softc *)dev->priv;
- u16 *data = (u16 *)&rq->ifr_data;
- unsigned long flags;
- int retval;
-
- spin_lock_irqsave(&sc->sbm_lock, flags);
- retval = 0;
-
- switch(cmd) {
- case SIOCDEVPRIVATE: /* Get the address of the PHY in use. */
- data[0] = sc->sbm_phys[0] & 0x1f;
- /* Fall Through */
- case SIOCDEVPRIVATE+1: /* Read the specified MII register. */
- data[3] = sbmac_mii_read(sc, data[0] & 0x1f, data[1] & 0x1f);
- break;
- case SIOCDEVPRIVATE+2: /* Write the specified MII register */
- if (!capable(CAP_NET_ADMIN)) {
- retval = -EPERM;
- break;
- }
- if (debug > 1) {
- printk(KERN_DEBUG "%s: sbmac_mii_ioctl: write %02X %02X %02Xn",dev->name,
- data[0],data[1],data[2]);
- }
- sbmac_mii_write(sc, data[0] & 0x1f, data[1] & 0x1f, data[2]);
- break;
- default:
- retval = -EOPNOTSUPP;
- }
-
- spin_unlock_irqrestore(&sc->sbm_lock, flags);
- return retval;
- }
- static int sbmac_close(struct net_device *dev)
- {
- struct sbmac_softc *sc = (struct sbmac_softc *)dev->priv;
- unsigned long flags;
-
- sbmac_set_channel_state(sc,sbmac_state_off);
-
- del_timer_sync(&sc->sbm_timer);
-
- spin_lock_irqsave(&sc->sbm_lock, flags);
-
- netif_stop_queue(dev);
-
- if (debug > 1) {
- printk(KERN_DEBUG "%s: Shutting down ethercardn",dev->name);
- }
-
- spin_unlock_irqrestore(&sc->sbm_lock, flags);
-
- /* Make sure there is no irq-handler running on a different CPU. */
- synchronize_irq();
-
- free_irq(dev->irq, dev);
-
- sbdma_emptyring(&(sc->sbm_txdma));
- sbdma_emptyring(&(sc->sbm_rxdma));
-
- MOD_DEC_USE_COUNT;
-
- return 0;
- }
- #if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR)
- static void
- sbmac_setup_hwaddr(int chan,char *addr)
- {
- uint8_t eaddr[6];
- uint64_t val;
- sbmac_port_t port;
- port = A_MAC_CHANNEL_BASE(chan);
- sbmac_parse_hwaddr(addr,eaddr);
- val = sbmac_addr2reg(eaddr);
- SBMAC_WRITECSR(PKSEG1(port+R_MAC_ETHERNET_ADDR),val);
- val = SBMAC_READCSR(PKSEG1(port+R_MAC_ETHERNET_ADDR));
- }
- #endif
- static struct net_device *dev_sbmac[MAX_UNITS] = {0,0,0};
- static int __init
- sbmac_init_module(void)
- {
- int idx;
- int macidx = 0;
- struct net_device *dev;
- sbmac_port_t port;
- int chip_max_units;
-
- /*
- * For bringup when not using the firmware, we can pre-fill
- * the MAC addresses using the environment variables
- * specified in this file (or maybe from the config file?)
- */
- #ifdef SBMAC_ETH0_HWADDR
- sbmac_setup_hwaddr(0,SBMAC_ETH0_HWADDR);
- #endif
- #ifdef SBMAC_ETH1_HWADDR
- sbmac_setup_hwaddr(1,SBMAC_ETH1_HWADDR);
- #endif
- #ifdef SBMAC_ETH2_HWADDR
- sbmac_setup_hwaddr(2,SBMAC_ETH2_HWADDR);
- #endif
- /*
- * Walk through the Ethernet controllers and find
- * those who have their MAC addresses set.
- */
- chip_revision = SBMAC_READCSR(PKSEG1(A_SCD_SYSTEM_REVISION));
- switch ((int)G_SYS_PART(chip_revision)) {
- case 0x1150:
- case 0x1250:
- chip_max_units = 3;
- break;
- case 0x1120:
- case 0x1125:
- case 0x1126:
- chip_max_units = 2;
- break;
- default:
- chip_max_units = 0;
- break;
- }
- if (chip_max_units > MAX_UNITS)
- chip_max_units = MAX_UNITS;
- for (idx = 0; idx < chip_max_units; idx++) {
- /*
- * This is the base address of the MAC.
- */
- port = A_MAC_CHANNEL_BASE(idx);
- /*
- * 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[idx] = SBMAC_READCSR(PKSEG1(port+R_MAC_ETHERNET_ADDR));
- if (sbmac_orig_hwaddr[idx] == 0) {
- printk( KERN_DEBUG "sbmac: not configuring MAC at %xn",(uint32_t)port);
- continue;
- }
- /*
- * Okay, cool. Initialize this MAC.
- */
- dev = init_etherdev(NULL,sizeof(struct sbmac_softc));
- if (!dev)
- return -ENOMEM; /* return ENOMEM */
- dev->irq = K_INT_MAC_0 + idx;
- dev->base_addr = port;
- dev->mem_end = 0;
- /*dev->init = sbmac_init;*/
- sbmac_init(dev);
- dev_sbmac[macidx] = dev;
- macidx++;
- }
- /*
- * Should we care, 'macidx' is the total number of enabled MACs.
- */
-
- return 0;
- }
- static void __exit
- sbmac_cleanup_module(void)
- {
- int idx;
- struct net_device *dev;
- sbmac_port_t port;
- for (idx = 0; idx < MAX_UNITS; idx++) {
- dev = dev_sbmac[idx];
- if (dev == NULL) continue;
- if (dev->priv != NULL) {
- struct sbmac_softc *sc = (struct sbmac_softc *) dev->priv;
-
- unregister_netdev(dev);
-
- sbmac_uninitctx(sc);
-
- }
- port = A_MAC_CHANNEL_BASE(idx);
- SBMAC_WRITECSR(PKSEG1(port+R_MAC_ETHERNET_ADDR), sbmac_orig_hwaddr[idx] );
- KFREE(dev);
- dev_sbmac[idx] = NULL;
- }
- }
- module_init(sbmac_init_module);
- module_exit(sbmac_cleanup_module);