diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/mvme5500/network/if_1GHz/if_wm.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/mvme5500/network/if_1GHz/if_wm.c | 1556 |
1 files changed, 1556 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/mvme5500/network/if_1GHz/if_wm.c b/c/src/lib/libbsp/powerpc/mvme5500/network/if_1GHz/if_wm.c new file mode 100644 index 0000000000..453da7d9b1 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/mvme5500/network/if_1GHz/if_wm.c @@ -0,0 +1,1556 @@ +/* + * Copyright (c) 2004,2005 RTEMS/Mvme5500 port by S. Kate Feng <feng1@bnl.gov> + * Brookhaven National Laboratory, All rights reserved + * + * Acknowledgements: + * netBSD : Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc. + * Jason R. Thorpe for Wasabi Systems, Inc. + * Intel : NDA document + * + * Some notes from the author, S. Kate Feng : + * + * 1) The error reporting routine i82544EI_error() employs two pointers + * for the error report buffer. One for the ISR and another one for + * the error report. + * 2) Enable the hardware Auto-Negotiation state machine. + * 3) Set Big Endian mode in the WMREG_CTRL so that we do not need htole32 + * because PPC is big endian mode. + * However, the data packet structure defined in if_wmreg.h + * should be redefined for the big endian mode. + * 4) To ensure the cache coherence, the MOTLoad had the PCI + * snoop control registers (0x1f00) set to "snoop to WB region" for + * the entire 512MB of memory. + * 5) MOTLoad default : + * little endian mode, cache line size is 32 bytes, no checksum control, + * hardware auto-neg. state machine disabled. PCI control "snoop + * to WB region", MII mode (PHY) instead of TBI mode. + * 6) We currently only use 32-bit (instead of 64-bit) DMA addressing. + * 7) Support for checksum offloading and TCP segmentation offload will + * be available for releasing in 2008, upon request, if I still believe. + * + */ + +#define BYTE_ORDER BIG_ENDIAN + +#define INET + +#include <rtems.h> +#include <rtems/bspIo.h> /* printk */ +#include <stdio.h> /* printf for statistics */ +#include <string.h> + +#include <libcpu/io.h> /* inp & friends */ +#include <libcpu/spr.h> /* registers.h is included here */ +#include <bsp.h> + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/mbuf.h> + +#include <rtems/rtems_bsdnet.h> +#include <rtems/rtems_bsdnet_internal.h> +#include <rtems/error.h> +#include <errno.h> + +#include <rtems/rtems/types.h> +#include <rtems/score/cpu.h> + +#include <sys/queue.h> + +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <sys/sockio.h> /* SIOCADDMULTI, SIOC... */ +#include <net/if.h> +#include <net/if_dl.h> +#include <netinet/in.h> +#include <netinet/if_ether.h> + +#ifdef INET +#include <netinet/in_var.h> +#endif + +#include <bsp/irq.h> +#include <bsp/pci.h> +#include <bsp/pcireg.h> +#include <bsp/if_wmreg.h> +#define WMREG_RADV 0x282c /* Receive Interrupt Absolute Delay Timer */ + +/*#define CKSUM_OFFLOAD*/ + +#define ETHERTYPE_FLOWCONTROL 0x8808 /* 802.3x flow control packet */ + +#define i82544EI_TASK_NAME "IGHZ" +#define SOFTC_ALIGN 4095 + +#define INTR_ERR_SIZE 16 + +/*#define WM_DEBUG*/ +#ifdef WM_DEBUG +#define WM_DEBUG_LINK 0x01 +#define WM_DEBUG_TX 0x02 +#define WM_DEBUG_RX 0x04 +#define WM_DEBUG_GMII 0x08 +int wm_debug = WM_DEBUG_TX|WM_DEBUG_RX|WM_DEBUG_LINK; + +#define DPRINTF(x, y) if (wm_debug & (x)) printk y +#else +#define DPRINTF(x, y) /* nothing */ +#endif /* WM_DEBUG */ + +/* RTEMS event to kill the daemon */ +#define KILL_EVENT RTEMS_EVENT_1 +/* RTEMS event to (re)start the transmitter */ +#define START_TRANSMIT_EVENT RTEMS_EVENT_2 +/* RTEMS events used by the ISR */ +#define RX_EVENT RTEMS_EVENT_3 +#define TX_EVENT RTEMS_EVENT_4 +#define ERR_EVENT RTEMS_EVENT_5 +#define INIT_EVENT RTEMS_EVENT_6 + +#define ALL_EVENTS (KILL_EVENT|START_TRANSMIT_EVENT|RX_EVENT|TX_EVENT|ERR_EVENT|INIT_EVENT) + + +#define NTXDESC 128 +#define NTXDESC_MASK (NTXDESC - 1) +#define WM_NEXTTX(x) (((x) + 1) & NTXDESC_MASK) + +#define NRXDESC 64 +#define NRXDESC_MASK (NRXDESC - 1) +#define WM_NEXTRX(x) (((x) + 1) & NRXDESC_MASK) +#define WM_PREVRX(x) (((x) - 1) & NRXDESC_MASK) + +#define WM_CDOFF(x) offsetof(struct wm_control_data, x) +#define WM_CDTXOFF(x) WM_CDOFF(sc_txdescs[(x)]) +#define WM_CDRXOFF(x) WM_CDOFF(sc_rxdescs[(x)]) + +#define TXQ_HiLmt_OFF 64 + +static uint32_t TxDescCmd; + +/* + * Software state per device. + */ +struct wm_softc { + wiseman_txdesc_t sc_txdescs[NTXDESC]; /* transmit descriptor memory */ + wiseman_rxdesc_t sc_rxdescs[NRXDESC]; /* receive descriptor memory */ + struct mbuf *txs_mbuf[NTXDESC]; /* transmit buffer memory */ + struct mbuf *rxs_mbuf[NRXDESC]; /* receive buffer memory */ + struct wm_softc *next_module; + volatile unsigned int intr_errsts[INTR_ERR_SIZE]; /* intr_status */ + unsigned int intr_err_ptr1; /* ptr used in i82544EI_error() */ + unsigned int intr_err_ptr2; /* ptr used in ISR */ + int txs_firstdesc; /* first descriptor in packet */ + int txs_lastdesc; /* last descriptor in packet */ + int txs_ndesc; /* # of descriptors used */ + unsigned sc_membase; /* Memory space base address */ + unsigned sc_memsize; /* Memory space size */ + + char dv_xname[16]; /* external name (name + unit) */ + void *sc_sdhook; /* shutdown hook */ + struct arpcom arpcom; /* rtems if structure, contains ifnet */ + int sc_flags; /* flags; see below */ + int sc_bus_speed; /* PCI/PCIX bus speed */ + int sc_flowflags; /* 802.3x flow control flags */ + + void *sc_ih; /* interrupt cookie */ + + int sc_ee_addrbits; /* EEPROM address bits */ + rtems_id daemonTid; + rtems_id daemonSync; /* synchronization with the daemon */ + + int txq_next; /* next Tx descriptor ready for transmitting */ + uint32_t txq_nactive; /* number of active TX descriptors */ + uint32_t txq_fi; /* next free Tx descriptor */ + uint32_t txq_free; /* number of free Tx jobs */ + uint32_t sc_txctx_ipcs; /* cached Tx IP cksum ctx */ + uint32_t sc_txctx_tucs; /* cached Tx TCP/UDP cksum ctx */ + + int sc_rxptr; /* next ready Rx descriptor/queue ent */ + int sc_rxdiscard; + int sc_rxlen; + uint32_t sc_ctrl; /* prototype CTRL register */ +#if 0 + uint32_t sc_ctrl_ext; /* prototype CTRL_EXT register */ +#endif + uint32_t sc_icr; /* prototype interrupt bits */ + uint32_t sc_tctl; /* prototype TCTL register */ + uint32_t sc_rctl; /* prototype RCTL register */ + uint32_t sc_tipg; /* prototype TIPG register */ + uint32_t sc_fcrtl; /* prototype FCRTL register */ + + int sc_mchash_type; /* multicast filter offset */ + + /* statistics */ + struct { + volatile unsigned long rxInterrupts; + volatile unsigned long txInterrupts; + unsigned long txMultiBuffPacket; + unsigned long txMultiMaxLen; + unsigned long txSinglMaxLen; + unsigned long txMultiMaxLoop; + unsigned long txBuffMaxLen; + unsigned long linkInterrupts; + unsigned long length_errors; + unsigned long frame_errors; + unsigned long crc_errors; + unsigned long rxOvrRunInterrupts; /* Rx overrun interrupt */ + unsigned long rxSeqErr; + unsigned long rxC_ordered; + unsigned long ghostInterrupts; + unsigned long linkStatusChng; + } stats; +}; + +/* <skf> our memory address seen from the PCI bus should be 1:1 */ +#define htole32(x) le32toh(x) +#define le32toh(x) CPU_swap_u32((unsigned int) x) +#define le16toh(x) CPU_swap_u16(x) + +/* sc_flags */ +#define WM_F_HAS_MII 0x01 /* has MII */ +/* 82544 EI does not perform EEPROM handshake, EEPROM interface is not SPI */ +#define WM_F_EEPROM_HANDSHAKE 0x02 /* requires EEPROM handshake */ +#define WM_F_EEPROM_SPI 0x04 /* EEPROM is SPI */ +#define WM_F_IOH_VALID 0x10 /* I/O handle is valid */ +#define WM_F_BUS64 0x20 /* bus is 64-bit */ +#define WM_F_PCIX 0x40 /* bus is PCI-X */ + +#define CSR_READ(sc,reg) in_le32((volatile unsigned *)(sc->sc_membase+reg)) +#define CSR_WRITE(sc,reg,val) out_le32((volatile unsigned *)(sc->sc_membase+reg), val) + +#define WM_CDTXADDR(sc) ( (uint32_t) &sc->sc_txdescs[0] ) +#define WM_CDRXADDR(sc) ( (uint32_t) &sc->sc_rxdescs[0] ) + +static struct wm_softc *root_i82544EI_dev = NULL; + +static void i82544EI_ifstart(struct ifnet *ifp); +static int wm_ioctl(struct ifnet *ifp, u_long cmd,uint32_t data); +static void i82544EI_ifinit(void *arg); +static void wm_stop(struct ifnet *ifp, int disable); + +static void wm_rxdrain(struct wm_softc *sc); +static int wm_add_rxbuf(struct wm_softc *sc, int idx); +static int wm_read_eeprom(struct wm_softc *sc,int word,int wordcnt, uint16_t *data); +static void i82544EI_daemon(void *arg); +static void wm_set_filter(struct wm_softc *sc); + +static void i82544EI_isr(); +static void i82544EI_sendpacket(struct wm_softc *sc, struct mbuf *m); +extern int pci_mem_find(), pci_io_find(), pci_get_capability(); +extern char * ether_sprintf1(); + +static void i82544EI_irq_on(const rtems_irq_connect_data *irq) +{ + struct wm_softc *sc; + unsigned int irqMask= ICR_TXDW | ICR_LSC | ICR_RXSEQ | ICR_RXDMT0 | ICR_RXO | ICR_RXT0 | ICR_RXCFG; + + for (sc= root_i82544EI_dev; sc; sc= sc-> next_module) { + CSR_WRITE(sc,WMREG_IMS,(CSR_READ(sc,WMREG_IMS)| irqMask) ); + return; + } +} + +static void i82544EI_irq_off(const rtems_irq_connect_data *irq) +{ + struct wm_softc *sc; + unsigned int irqMask= ICR_TXDW | ICR_LSC | ICR_RXSEQ | ICR_RXDMT0 | ICR_RXO | ICR_RXT0 |ICR_RXCFG ; + + for (sc= root_i82544EI_dev; sc; sc= sc-> next_module) { + CSR_WRITE(sc,WMREG_IMS, (CSR_READ(sc,WMREG_IMS) & ~irqMask) ); + return; + } +} + +static int i82544EI_irq_is_on(const rtems_irq_connect_data *irq) +{ + return(CSR_READ(root_i82544EI_dev,WMREG_ICR) & root_i82544EI_dev->sc_icr); +} + +static rtems_irq_connect_data i82544IrqData={ + BSP_GPP_82544_IRQ, + (rtems_irq_hdl) i82544EI_isr, + (rtems_irq_enable) i82544EI_irq_on, + (rtems_irq_disable) i82544EI_irq_off, + (rtems_irq_is_enabled) i82544EI_irq_is_on, +}; + +int rtems_i82544EI_driver_attach(struct rtems_bsdnet_ifconfig *config, int attach) +{ + struct wm_softc *sc; + struct ifnet *ifp; + uint8_t enaddr[ETHER_ADDR_LEN]; + uint16_t myea[ETHER_ADDR_LEN / 2], cfg1, cfg2, swdpin; + unsigned reg; + int b,d,f; /* PCI bus/device/function */ + int unit; + void *softc_mem; + char *name; + + unit = rtems_bsdnet_parse_driver_name(config, &name); + if (unit < 0) return 0; + + printk("\nEthernet driver name %s unit %d \n",name, unit); + printk("Copyright (c) 2004,2005 S. Kate Feng <feng1@bnl.gov> (RTEMS/mvme5500 port)\n"); + + /* Make sure certain elements e.g. descriptor lists are aligned.*/ + softc_mem = rtems_bsdnet_malloc(sizeof(*sc) + SOFTC_ALIGN, M_FREE, M_NOWAIT); + + /* Check for the very unlikely case of no memory. */ + if (softc_mem == NULL) + rtems_panic("i82544EI: OUT OF MEMORY"); + + sc = (void *)(((long)softc_mem + SOFTC_ALIGN) & ~SOFTC_ALIGN); + memset(sc, 0, sizeof(*sc)); + + sprintf(sc->dv_xname, "%s%d", name, unit); + + if (pci_find_device(PCI_VENDOR_ID_INTEL,PCI_DEVICE_INTEL_82544EI_COPPER, + unit-1,&b, &d, &f)) + rtems_panic("i82544EI device ID not found\n"); + +#if WM_DEBUG + printk("82544EI:b%d, d%d, f%d\n", b, d,f); +#endif + + /* Memory-mapped acccess is required for normal operation.*/ + if ( pci_mem_find(b,d,f,PCI_MAPREG_START, &sc->sc_membase, &sc->sc_memsize)) + rtems_panic("i82544EI: unable to map memory space\n"); + +#ifdef WM_DEBUG + printk("Memory base addr 0x%x\n", sc->sc_membase); + printk("txdesc[0] addr:0x%x, rxdesc[0] addr:0x%x, sizeof sc %d\n",&sc->sc_txdescs[0], &sc->sc_rxdescs[0], sizeof(*sc)); +#endif + + + sc->sc_ctrl |=CSR_READ(sc,WMREG_CTRL); + /* + * Determine a few things about the bus we're connected to. + */ + reg = CSR_READ(sc,WMREG_STATUS); + if (reg & STATUS_BUS64) sc->sc_flags |= WM_F_BUS64; + sc->sc_bus_speed = (reg & STATUS_PCI66) ? 66 : 33; +#ifdef WM_DEBUG + printk("%s%d: %d-bit %dMHz PCI bus\n",name, unit, + (sc->sc_flags & WM_F_BUS64) ? 64 : 32, sc->sc_bus_speed); +#endif + + /* + * Setup some information about the EEPROM. + */ + + sc->sc_ee_addrbits = 6; + +#ifdef WM_DEBUG + printk("%s%d: %u word (%d address bits) MicroWire EEPROM\n", + name, unit, 1U << sc->sc_ee_addrbits, + sc->sc_ee_addrbits); +#endif + + /* + * Read the Ethernet address from the EEPROM. + */ + if (wm_read_eeprom(sc, EEPROM_OFF_MACADDR, + sizeof(myea) / sizeof(myea[0]), myea)) + rtems_panic("i82544ei 1GHZ ethernet: unable to read Ethernet address"); + + enaddr[0] = myea[0] & 0xff; + enaddr[1] = myea[0] >> 8; + enaddr[2] = myea[1] & 0xff; + enaddr[3] = myea[1] >> 8; + enaddr[4] = myea[2] & 0xff; + enaddr[5] = myea[2] >> 8; + + + memcpy(sc->arpcom.ac_enaddr, enaddr, ETHER_ADDR_LEN); +#ifdef WM_DEBUG + printk("%s: Ethernet address %s\n", sc->dv_xname, + ether_sprintf1(enaddr)); +#endif + + /* + * Read the config info from the EEPROM, and set up various + * bits in the control registers based on their contents. + */ + if (wm_read_eeprom(sc, EEPROM_OFF_CFG1, 1, &cfg1)) { + printk("%s: unable to read CFG1 from EEPROM\n",sc->dv_xname); + return(0); + } + if (wm_read_eeprom(sc, EEPROM_OFF_CFG2, 1, &cfg2)) { + printk("%s: unable to read CFG2 from EEPROM\n",sc->dv_xname); + return(0); + } + if (wm_read_eeprom(sc, EEPROM_OFF_SWDPIN, 1, &swdpin)) { + printk("%s: unable to read SWDPIN from EEPROM\n",sc->dv_xname); + return(0); + } + + if (cfg1 & EEPROM_CFG1_ILOS) sc->sc_ctrl |= CTRL_ILOS; + sc->sc_ctrl|=((swdpin >> EEPROM_SWDPIN_SWDPIO_SHIFT) & 0xf) << + CTRL_SWDPIO_SHIFT; + sc->sc_ctrl |= ((swdpin >> EEPROM_SWDPIN_SWDPIN_SHIFT) & 0xf) << + CTRL_SWDPINS_SHIFT; + + CSR_WRITE(sc,WMREG_CTRL, sc->sc_ctrl); +#if 0 + CSR_WRITE(sc,WMREG_CTRL_EXT, sc->sc_ctrl_ext); +#endif + + ifp = &sc->arpcom.ac_if; + /* set this interface's name and unit */ + ifp->if_unit = unit; + ifp->if_name = name; + ifp->if_softc = sc; + ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; + ifp->if_mtu = config->mtu ? config->mtu : ETHERMTU; + ifp->if_ioctl = wm_ioctl; + ifp->if_start = i82544EI_ifstart; + /* ifp->if_watchdog = wm_watchdog;*/ + ifp->if_init = i82544EI_ifinit; + if (ifp->if_snd.ifq_maxlen == 0) + ifp->if_snd.ifq_maxlen = ifqmaxlen; + + ifp->if_output = ether_output; + + /* create the synchronization semaphore */ + if (RTEMS_SUCCESSFUL != rtems_semaphore_create( + rtems_build_name('I','G','H','Z'),0,0,0,&sc->daemonSync)) + rtems_panic("i82544EI: semaphore creation failed"); + + sc->next_module = root_i82544EI_dev; + root_i82544EI_dev = sc; + + /* Attach the interface. */ + if_attach(ifp); + ether_ifattach(ifp); +#ifdef WM_DEBUG + printk("82544EI: Ethernet driver has been attached (handle 0x%08x,ifp 0x%08x)\n",sc, ifp); +#endif + + return(1); +} + +/* + * i82544EI_ifstart: [ifnet interface function] + * + * Start packet transmission on the interface. + */ +static void +i82544EI_ifstart(struct ifnet *ifp) +{ + struct wm_softc *sc = ifp->if_softc; + +#ifdef WM_DEBUG + printk("i82544EI_ifstart("); +#endif + + if ((ifp->if_flags & IFF_RUNNING) == 0) { +#ifdef WM_DEBUG + printk("IFF_RUNNING==0\n"); +#endif + return; + } + + ifp->if_flags |= IFF_OACTIVE; + rtems_event_send (sc->daemonTid, START_TRANSMIT_EVENT); +#ifdef WM_DEBUG + printk(")\n"); +#endif +} + +static void i82544EI_stats(struct wm_softc *sc) +{ + struct ifnet *ifp = &sc->arpcom.ac_if; + + printf(" Rx Interrupts:%-8u\n", sc->stats.rxInterrupts); + printf(" Receive Packets:%-8u\n", CSR_READ(sc,WMREG_GPRC)); + printf(" Receive Overrun:%-8u\n", sc->stats.rxOvrRunInterrupts); + printf(" Receive errors:%-8u\n", CSR_READ(sc,WMREG_RXERRC)); + printf(" Rx sequence error:%-8u\n", sc->stats.rxSeqErr); + printf(" Rx /C/ ordered:%-8u\n", sc->stats.rxC_ordered); + printf(" Rx Length Errors:%-8u\n", CSR_READ(sc,WMREG_RLEC)); + printf(" Tx Interrupts:%-8u\n", sc->stats.txInterrupts); +#if 0 + printf("Multi-BuffTx Packets:%-8u\n", sc->stats.txMultiBuffPacket); + printf("Multi-BuffTx max len:%-8u\n", sc->stats.txMultiMaxLen); + printf("SingleBuffTx max len:%-8u\n", sc->stats.txSinglMaxLen); + printf("Multi-BuffTx maxloop:%-8u\n", sc->stats.txMultiMaxLoop); + printf("Tx buffer max len :%-8u\n", sc->stats.txBuffMaxLen); +#endif + printf(" Transmitt Packets:%-8u\n", CSR_READ(sc,WMREG_GPTC)); + printf(" Transmitt errors:%-8u\n", ifp->if_oerrors); + printf(" Active Txqs:%-8u\n", sc->txq_nactive); + printf(" collisions:%-8u\n", CSR_READ(sc,WMREG_COLC)); + printf(" Crc Errors:%-8u\n", CSR_READ(sc,WMREG_CRCERRS)); + printf(" Link Status Change:%-8u\n", sc->stats.linkStatusChng); +} + +/* + * wm_ioctl: [ifnet interface function] + * + * Handle control requests from the operator. + */ +static int wm_ioctl(struct ifnet *ifp, u_long cmd,uint32_t data) +{ + struct wm_softc *sc = ifp->if_softc; + int error=0; + + switch (cmd) { + default: + error = ether_ioctl(ifp, cmd, data); + if (error == ENETRESET) { + /* + * Multicast list has changed; set the hardware filter + * accordingly. + */ + wm_set_filter(sc); + error = 0; + } + break; + case SIO_RTEMS_SHOW_STATS: + i82544EI_stats(sc); + break; + } + + /* Try to get more packets going.*/ + i82544EI_ifstart(ifp); + return (error); +} + +/* + * wm_isr: + * + * Interrupt service routine. + */ +static void i82544EI_isr() +{ + volatile struct wm_softc *sc = root_i82544EI_dev; + uint32_t icr; + rtems_event_set events=0; + + /* Reading the WMREG_ICR clears the interrupt bits */ + icr = CSR_READ(sc,WMREG_ICR); + + if ( icr & (ICR_RXDMT0|ICR_RXT0)) { + sc->stats.rxInterrupts++; + events |= RX_EVENT; + } + + if (icr & ICR_TXDW) { + sc->stats.txInterrupts++; + events |= TX_EVENT; + } + /* <SKF> Rx overrun : no available receive buffer + * or PCI receive bandwidth inadequate. + */ + if (icr & ICR_RXO) { + sc->stats.rxOvrRunInterrupts++; + events |= INIT_EVENT; + } + if (icr & ICR_RXSEQ) /* framing error */ { + sc->intr_errsts[sc->intr_err_ptr2++]=icr; + sc->intr_err_ptr2 %=INTR_ERR_SIZE; /* Till Straumann */ + events |= ERR_EVENT; + sc->stats.rxSeqErr++; + } + if ( !icr) sc->stats.ghostInterrupts++; + + if (icr & ICR_LSC) sc->stats.linkStatusChng++; + if (icr & ICR_RXCFG) sc->stats.rxC_ordered++; + + rtems_event_send(sc->daemonTid, events); +} + +/* + * i82544EI_sendpacket: + * + * Helper; handle transmit interrupts. + */ +static void i82544EI_sendpacket(struct wm_softc *sc, struct mbuf *m) +{ + +#ifdef WM_DEBUG_TX + printk("sendpacket("); +#endif + + if ( !(m->m_next)) { /* single buffer packet */ + sc->txs_mbuf[sc->txq_next]= m; + /* Note: we currently only use 32-bit DMA addresses. */ + sc->sc_txdescs[sc->txq_next].wtx_addr.wa_low = htole32(mtod(m, void*)); + sc->sc_txdescs[sc->txq_next].wtx_cmdlen =htole32(TxDescCmd | m->m_len); + sc->txs_lastdesc= sc->txq_next; + sc->txq_next = WM_NEXTTX(sc->txq_next); + sc->txq_nactive++; + sc->txq_free--; + } + else /* multiple mbufs in this packet */ + { + struct mbuf *mtp, *mdest; + volatile unsigned char *pt; + int len, y, loop=0; + +#ifdef WM_DEBUG_TX + printk("multi mbufs "); +#endif + mtp = m; + while ( mtp) { + MGETHDR(mdest, M_WAIT, MT_DATA); + MCLGET(mdest, M_WAIT); + pt = (volatile unsigned char *)mdest->m_data; + for ( len=0;mtp;mtp=mtp->m_next) { + loop++; + /* Each descriptor gets a 2k (MCLBYTES) buffer, although + * the length of each descriptor can be up to 16288 bytes. + * For packets which fill more than one buffer ( >2k), we + * chain them together. + * <Kate Feng> : This effective for packets > 2K + * The other way is effective for packets < 2K + */ + if ( ((y=(len+mtp->m_len)) > sizeof(union mcluster))) { + printk(">2048, use next descriptor\n"); + break; + } + memcpy((void *)pt,(char *)mtp->m_data, mtp->m_len); + pt += mtp->m_len; + len += mtp->m_len; +#if 0 + sc->stats.txSinglMaxLen= MAX(mtp->m_len, sc->stats.txSinglMaxLen); +#endif + } /* end for loop */ + mdest->m_len=len; + sc->txs_mbuf[sc->txq_next] = mdest; + /* Note: we currently only use 32-bit DMA addresses. */ + sc->sc_txdescs[sc->txq_next].wtx_addr.wa_low = htole32(mtod(mdest, void*)); + sc->sc_txdescs[sc->txq_next].wtx_cmdlen = htole32(TxDescCmd|mdest->m_len); + sc->txs_lastdesc = sc->txq_next; + sc->txq_next = WM_NEXTTX(sc->txq_next); + sc->txq_nactive ++; + if (sc->txq_free) + sc->txq_free--; + else + rtems_panic("i8254EI : no more free descriptors"); +#if 0 + sc->stats.txMultiMaxLen= MAX(mdest->m_len, sc->stats.txMultiMaxLen); + sc->stats.txMultiBuffPacket++; +#endif + } /* end for while */ + /* free old mbuf chain */ +#if 0 + sc->stats.txMultiMaxLoop=MAX(loop, sc->stats.txMultiMaxLoop); +#endif + m_freem(m); + m=0; + } /* end multiple mbufs */ + + DPRINTF(WM_DEBUG_TX,("%s: TX: desc %d: cmdlen 0x%08x\n", sc->dv_xname, + sc->txs_lastdesc, le32toh(sc->sc_txdescs[sc->txs_lastdesc].wtx_cmdlen))); + DPRINTF(WM_DEBUG_TX,("status 0x%08x\n",sc->sc_txdescs[sc->txq_fi].wtx_fields.wtxu_status)); + + memBar(); + + /* This is the location where software writes the first NEW descriptor */ + CSR_WRITE(sc,WMREG_TDT, sc->txq_next); + + DPRINTF(WM_DEBUG_TX,("%s: addr 0x%08x, TX: TDH %d, TDT %d\n",sc->dv_xname, + le32toh(sc->sc_txdescs[sc->txs_lastdesc].wtx_addr.wa_low), CSR_READ(sc,WMREG_TDH), + CSR_READ(sc,WMREG_TDT))); + + DPRINTF(WM_DEBUG_TX,("%s: TX: finished transmitting packet, job %d\n", + sc->dv_xname, sc->txq_next)); + +} + +static void i82544EI_txq_free(struct wm_softc *sc, uint8_t status) +{ + struct ifnet *ifp = &sc->arpcom.ac_if; + + /* We might use the statistics registers instead of variables + * to keep tack of the network statistics + */ + + /* statistics */ + ifp->if_opackets++; + + if (status & (WTX_ST_EC|WTX_ST_LC)) { + ifp->if_oerrors++; + + if (status & WTX_ST_LC) + printf("%s: late collision\n", sc->dv_xname); + else if (status & WTX_ST_EC) { + ifp->if_collisions += 16; + printf("%s: excessive collisions\n", sc->dv_xname); + } + } + /* Free the original mbuf chain */ + m_freem(sc->txs_mbuf[sc->txq_fi]); + sc->txs_mbuf[sc->txq_fi] = 0; + sc->sc_txdescs[sc->txq_fi].wtx_fields.wtxu_status=0; + + sc->txq_free ++; + sc->txq_fi = WM_NEXTTX(sc->txq_fi); + --sc->txq_nactive; +} + +static void i82544EI_txq_done(struct wm_softc *sc) +{ + uint8_t status; + + /* + * Go through the Tx list and free mbufs for those + * frames which have been transmitted. + */ + while ( sc->txq_nactive > 0) { + status = sc->sc_txdescs[sc->txq_fi].wtx_fields.wtxu_status; + if ((status & WTX_ST_DD) == 0) break; + i82544EI_txq_free(sc, status); + DPRINTF(WM_DEBUG_TX,("%s: TX: job %d done\n", + sc->dv_xname, sc->txq_fi)); + } +} + +static void wm_init_rxdesc(struct wm_softc *sc, int x) +{ + wiseman_rxdesc_t *__rxd = &(sc)->sc_rxdescs[(x)]; + struct mbuf *m; + + m = sc->rxs_mbuf[x]; + + __rxd->wrx_addr.wa_low=htole32(mtod(m, void*)); + __rxd->wrx_addr.wa_high = 0; + __rxd->wrx_len = 0; + __rxd->wrx_cksum = 0; + __rxd->wrx_status = 0; + __rxd->wrx_errors = 0; + __rxd->wrx_special = 0; + /* Receive Descriptor Tail: add Rx desc. to H/W free list */ + CSR_WRITE(sc,WMREG_RDT, (x)); +} + +static void i82544EI_rx(struct wm_softc *sc) +{ + struct ifnet *ifp = &sc->arpcom.ac_if; + struct mbuf *m; + int i, len; + uint8_t status, errors; + struct ether_header *eh; + +#ifdef WM_DEBUG + printk("i82544EI_rx()\n"); +#endif + + for (i = sc->sc_rxptr;; i = WM_NEXTRX(i)) { + DPRINTF(WM_DEBUG_RX, ("%s: RX: checking descriptor %d\n", + sc->dv_xname, i)); + + status = sc->sc_rxdescs[i].wrx_status; + errors = sc->sc_rxdescs[i].wrx_errors; + len = le16toh(sc->sc_rxdescs[i].wrx_len); + m = sc->rxs_mbuf[i]; + + if ((status & WRX_ST_DD) == 0) break; /* descriptor not done */ + + if (sc->sc_rxdiscard) { + printk("RX: discarding contents of descriptor %d\n", i); + wm_init_rxdesc(sc, i); + if (status & WRX_ST_EOP) { + /* Reset our state. */ + printk("RX: resetting rxdiscard -> 0\n"); + sc->sc_rxdiscard = 0; + } + continue; + } + + /* + * If an error occurred, update stats and drop the packet. + */ + if (errors &(WRX_ER_CE|WRX_ER_SE|WRX_ER_SEQ|WRX_ER_CXE|WRX_ER_RXE)) { + ifp->if_ierrors++; + if (errors & WRX_ER_SE) + printk("%s: symbol error\n",sc->dv_xname); + else if (errors & WRX_ER_SEQ) + printk("%s: receive sequence error\n",sc->dv_xname); + else if (errors & WRX_ER_CE) + printk("%s: CRC error\n",sc->dv_xname); + m_freem(m); + goto give_it_back; + } + + /* + * No errors. Receive the packet. + * + * Note, we have configured the chip to include the + * CRC with every packet. + */ + m->m_len = m->m_pkthdr.len = len - sizeof(struct ether_header); + + DPRINTF(WM_DEBUG_RX,("%s: RX: buffer at %p len %d\n", + sc->dv_xname, m->m_data, len)); + + + eh = mtod (m, struct ether_header *); + m->m_data += sizeof(struct ether_header); + ether_input (ifp, eh, m); + /* Pass it on. */ + ifp->if_ipackets++; + + give_it_back: + /* Add a new receive buffer to the ring.*/ + if (wm_add_rxbuf(sc, i) != 0) { + /* + * Failed, throw away what we've done so + * far, and discard the rest of the packet. + */ + printk("Failed in wm_add_rxbuf(), drop packet\n"); + ifp->if_ierrors++; + wm_init_rxdesc(sc, i); + if ((status & WRX_ST_EOP) == 0) + sc->sc_rxdiscard = 1; + m_freem(m); + } + } /* end for */ + + /* Update the receive pointer. */ + sc->sc_rxptr = i; + DPRINTF(WM_DEBUG_RX, ("%s: RX: rxptr -> %d\n", sc->dv_xname, i)); +} + +static int i82544EI_init_hw(struct wm_softc *sc) +{ + struct ifnet *ifp = &sc->arpcom.ac_if; + int i,error; + uint8_t cksumfields; + + /* Cancel any pending I/O. */ + wm_stop(ifp, 0); + + /* Initialize the error buffer ring */ + sc->intr_err_ptr1=0; + sc->intr_err_ptr2=0; + for (i=0; i< INTR_ERR_SIZE; i++) sc->intr_errsts[i]=0; + + /* Initialize the transmit descriptor ring. */ + memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); + sc->txq_free = NTXDESC; + sc->txq_next = 0; + sc->txs_lastdesc = 0; + sc->txq_next = 0; + sc->txq_free = NTXDESC; + sc->txq_nactive = 0; + + sc->sc_txctx_ipcs = 0xffffffff; + sc->sc_txctx_tucs = 0xffffffff; + + CSR_WRITE(sc,WMREG_TBDAH, 0); + CSR_WRITE(sc,WMREG_TBDAL, WM_CDTXADDR(sc)); +#ifdef WM_DEBUG + printk("TBDAL 0x%x, TDLEN %d\n", WM_CDTXADDR(sc), sizeof(sc->sc_txdescs)); +#endif + CSR_WRITE(sc,WMREG_TDLEN, sizeof(sc->sc_txdescs)); + CSR_WRITE(sc,WMREG_TDH, 0); + CSR_WRITE(sc,WMREG_TDT, 0); + CSR_WRITE(sc,WMREG_TIDV, 64 ); + CSR_WRITE(sc,WMREG_TADV, 128); + + CSR_WRITE(sc,WMREG_TXDCTL, TXDCTL_PTHRESH(0) | + TXDCTL_HTHRESH(0) | TXDCTL_WTHRESH(0)); + CSR_WRITE(sc,WMREG_RXDCTL, RXDCTL_PTHRESH(0) | + RXDCTL_HTHRESH(0) | RXDCTL_WTHRESH(1) | RXDCTL_GRAN ); + + CSR_WRITE(sc,WMREG_TQSA_LO, 0); + CSR_WRITE(sc,WMREG_TQSA_HI, 0); + + /* + * Set up checksum offload parameters for + * this packet. + */ +#ifdef CKSUM_OFFLOAD + if (m0->m_pkthdr.csum_flags & + (M_CSUM_IPv4|M_CSUM_TCPv4|M_CSUM_UDPv4)) { + if (wm_tx_cksum(sc, txs, &TxDescCmd,&cksumfields) != 0) { + /* Error message already displayed. */ + continue; + } + } else { +#endif + TxDescCmd = 0; + cksumfields = 0; +#ifdef CKSUM_OFFLOAD + } +#endif + + TxDescCmd |= WTX_CMD_EOP|WTX_CMD_IFCS|WTX_CMD_RS; + + /* Initialize the transmit job descriptors. */ + for (i = 0; i < NTXDESC; i++) { + sc->txs_mbuf[i] = 0; + sc->sc_txdescs[i].wtx_fields.wtxu_options=cksumfields; + sc->sc_txdescs[i].wtx_addr.wa_high = 0; + sc->sc_txdescs[i].wtx_addr.wa_low = 0; + sc->sc_txdescs[i].wtx_cmdlen = htole32(TxDescCmd); + } + + /* + * Initialize the receive descriptor and receive job + * descriptor rings. + */ + memset(sc->sc_rxdescs, 0, sizeof(sc->sc_rxdescs)); + CSR_WRITE(sc,WMREG_RDBAH, 0); + CSR_WRITE(sc,WMREG_RDBAL, WM_CDRXADDR(sc)); + CSR_WRITE(sc,WMREG_RDLEN, sizeof(sc->sc_rxdescs)); + CSR_WRITE(sc,WMREG_RDH, 0); + CSR_WRITE(sc,WMREG_RDT, 0); + CSR_WRITE(sc,WMREG_RDTR, 0 |RDTR_FPD); + CSR_WRITE(sc, WMREG_RADV, 256); + + for (i = 0; i < NRXDESC; i++) { + if (sc->rxs_mbuf[i] == NULL) { + if ((error = wm_add_rxbuf(sc, i)) != 0) { + printk("%s%d: unable to allocate or map rx buffer" + "%d, error = %d\n",ifp->if_name,ifp->if_unit, i, error); + /* + * XXX Should attempt to run with fewer receive + * XXX buffers instead of just failing. + */ + wm_rxdrain(sc); + return(error); + } + } else { + printk("sc->rxs_mbuf[%d] not NULL.\n", i); + wm_init_rxdesc(sc, i); + } + } + sc->sc_rxptr = 0; + sc->sc_rxdiscard = 0; + + /* + * Clear out the VLAN table -- we don't use it (yet). + */ + CSR_WRITE(sc,WMREG_VET, 0); + for (i = 0; i < WM_VLAN_TABSIZE; i++) + CSR_WRITE(sc,WMREG_VFTA + (i << 2), 0); + + /* + * Set up flow-control parameters. + * + * XXX Values could probably stand some tuning. + */ + CSR_WRITE(sc,WMREG_FCAL, FCAL_CONST);/*safe,even though MOTLOAD 0x00c28001 */ + CSR_WRITE(sc,WMREG_FCAH, FCAH_CONST);/*safe,even though MOTLOAD 0x00000100 */ + CSR_WRITE(sc,WMREG_FCT, ETHERTYPE_FLOWCONTROL);/*safe,even though MOTLoad 0x8808 */ + + + /* safe,even though MOTLoad default all 0 */ + sc->sc_fcrtl = FCRTL_DFLT; + + CSR_WRITE(sc,WMREG_FCRTH, FCRTH_DFLT); + CSR_WRITE(sc,WMREG_FCRTL, sc->sc_fcrtl); + CSR_WRITE(sc,WMREG_FCTTV, FCTTV_DFLT); + + sc->sc_ctrl &= ~CTRL_VME; + /*sc->sc_ctrl |= CTRL_TFCE | CTRL_RFCE;*/ + /* enable Big Endian Mode for the powerPC + sc->sc_ctrl |= CTRL_BEM;*/ + + /* Write the control registers. */ + CSR_WRITE(sc,WMREG_CTRL, sc->sc_ctrl); +#if 0 + CSR_WRITE(sc,WMREG_CTRL_EXT, sc->sc_ctrl_ext); +#endif + + /* MOTLoad : WMREG_RXCSUM (0x5000)= 0, no Rx checksum offloading */ + + /* + * Set up the interrupt registers. + */ + CSR_WRITE(sc,WMREG_IMC, 0xffffffffU); + /* Reading the WMREG_ICR clears the interrupt bits */ + CSR_READ(sc,WMREG_ICR); + + /* printf("WMREG_IMS 0x%x\n", CSR_READ(sc,WMREG_IMS));*/ + + sc->sc_icr = ICR_TXDW | ICR_LSC | ICR_RXSEQ | ICR_RXCFG | ICR_RXDMT0 | ICR_RXO | ICR_RXT0; + + CSR_WRITE(sc,WMREG_IMS, sc->sc_icr); + + /* Set up the inter-packet gap. */ + CSR_WRITE(sc,WMREG_TIPG, sc->sc_tipg); + +#if 0 /* XXXJRT */ + /* Set the VLAN ethernetype. */ + CSR_WRITE(sc,WMREG_VET, ETHERTYPE_VLAN); +#endif + + /* + * Set up the transmit control register; we start out with + * a collision distance suitable for FDX, but update it when + * we resolve the media type. + */ + sc->sc_tctl = TCTL_EN | TCTL_PSP | TCTL_CT(TX_COLLISION_THRESHOLD) | + TCTL_COLD(TX_COLLISION_DISTANCE_FDX) | TCTL_RTLC; /*transmitter enable*/ + + /* + * Set up the receive control register; we actually program + * the register when we set the receive filter. Use multicast + * address offset type 0. + * + * Only the i82544 has the ability to strip the incoming + * CRC, so we don't enable that feature. (TODO) + */ + sc->sc_mchash_type = 0; + sc->sc_rctl = RCTL_EN | RCTL_LBM_NONE | RCTL_RDMTS_1_2 | RCTL_LPE | + RCTL_DPF | RCTL_MO(sc->sc_mchash_type); + + /* (MCLBYTES == 2048) */ + sc->sc_rctl |= RCTL_2k; + +#ifdef WM_DEBUG + printk("RDBAL 0x%x,RDLEN %d, RDT %d\n",CSR_READ(sc,WMREG_RDBAL),CSR_READ(sc,WMREG_RDLEN), CSR_READ(sc,WMREG_RDT)); +#endif + + /* Set the receive filter. */ + wm_set_filter(sc); + + CSR_WRITE(sc,WMREG_TCTL, sc->sc_tctl); + + /* Map and establish our interrupt. */ + if (!BSP_install_rtems_irq_handler(&i82544IrqData)) + rtems_panic("1GHZ ethernet: unable to install ISR"); + + return(0); +} + +/* + * i82544EI_ifinit: [ifnet interface function] + * + * Initialize the interface. + */ +static void i82544EI_ifinit(void *arg) +{ + struct wm_softc *sc = (struct wm_softc*)arg; + +#ifdef WM_DEBUG + printk("i82544EI_ifinit(): daemon ID: 0x%08x)\n", sc->daemonTid); +#endif + if (sc->daemonTid) { +#ifdef WM_DEBUG + printk("i82544EI: daemon already up, doing nothing\n"); +#endif + return; + } + i82544EI_init_hw(sc); + + sc->daemonTid = rtems_bsdnet_newproc(i82544EI_TASK_NAME,4096,i82544EI_daemon,arg); + + /* ...all done! */ + sc->arpcom.ac_if.if_flags |= IFF_RUNNING; + +#ifdef WM_DEBUG + printk(")"); +#endif +} + +/* + * wm_txdrain: + * + * Drain the transmit queue. + */ +static void wm_txdrain(struct wm_softc *sc) +{ + int i; + + /* Release any queued transmit buffers. */ + for (i = 0; i < NTXDESC; i++) { + if (sc->txs_mbuf[i] != NULL) { + m_freem(sc->txs_mbuf[i]); + sc->txs_mbuf[i] = NULL; + } + } +} + +/* + * wm_rxdrain: + * + * Drain the receive queue. + */ +static void wm_rxdrain(struct wm_softc *sc) +{ + int i; + + for (i = 0; i < NRXDESC; i++) { + if (sc->rxs_mbuf[i] != NULL) { + m_freem(sc->rxs_mbuf[i]); + sc->rxs_mbuf[i] = NULL; + } + } +} + +static void i82544EI_tx_stop(struct wm_softc *sc) +{ + wm_txdrain(sc); +} + +static void i82544EI_rx_stop(struct wm_softc *sc) +{ + wm_rxdrain(sc); +} + +static void i82544EI_stop_hw(struct wm_softc *sc) +{ +#ifdef WM_DEBUG + printk("i82544EI_stop_hw("); +#endif + + /* remove our interrupt handler which will also + * disable interrupts at the MPIC and the device + * itself + */ + if (!BSP_remove_rtems_irq_handler(&i82544IrqData)) + rtems_panic("i82544EI: unable to remove IRQ handler!"); + + CSR_WRITE(sc,WMREG_IMS, 0); + + sc->arpcom.ac_if.if_flags &= ~IFF_RUNNING; + i82544EI_tx_stop(sc); + i82544EI_rx_stop(sc); +#ifdef WM_DEBUG + printk(")"); +#endif +} + +/* + * wm_stop: [ifnet interface function] + * + * Stop transmission on the interface. + */ +static void wm_stop(struct ifnet *ifp, int disable) +{ + struct wm_softc *sc = ifp->if_softc; + +#ifdef WM_DEBUG + printk("wm_stop("); +#endif + /* Stop the transmit and receive processes. */ + CSR_WRITE(sc,WMREG_TCTL, 0); + CSR_WRITE(sc,WMREG_RCTL, 0); + + wm_txdrain(sc); + wm_rxdrain(sc); + + /* Mark the interface as down */ + ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); +#ifdef WM_DEBUG + printk(")\n"); +#endif +} + +/* + * wm_eeprom_sendbits: + * + * Send a series of bits to the EEPROM. + */ +static void wm_eeprom_sendbits(struct wm_softc *sc, uint32_t bits, int nbits) +{ + uint32_t reg; + int x; + + reg = CSR_READ(sc,WMREG_EECD); + + for (x = nbits; x > 0; x--) { + if (bits & (1U << (x - 1))) + reg |= EECD_DI; + else + reg &= ~EECD_DI; + CSR_WRITE(sc,WMREG_EECD, reg); + rtems_bsp_delay(2); + CSR_WRITE(sc,WMREG_EECD, reg | EECD_SK); + rtems_bsp_delay(2); + CSR_WRITE(sc,WMREG_EECD, reg); + rtems_bsp_delay(2); + } +} + +/* + * wm_eeprom_recvbits: + * + * Receive a series of bits from the EEPROM. + */ +static void wm_eeprom_recvbits(struct wm_softc *sc, uint32_t *valp, int nbits) +{ + uint32_t reg, val; + int x; + + reg = CSR_READ(sc,WMREG_EECD) & ~EECD_DI; + + val = 0; + for (x = nbits; x > 0; x--) { + CSR_WRITE(sc,WMREG_EECD, reg | EECD_SK); + rtems_bsp_delay(2); + if (CSR_READ(sc,WMREG_EECD) & EECD_DO) + val |= (1U << (x - 1)); + CSR_WRITE(sc,WMREG_EECD, reg); + rtems_bsp_delay(2); + } + *valp = val; +} + +/* + * wm_read_eeprom_uwire: + * + * Read a word from the EEPROM using the MicroWire protocol. + * + * (The 82544EI Gigabit Ethernet Controller is compatible with + * most MicroWire interface, serial EEPROM devices.) + */ +static int wm_read_eeprom_uwire(struct wm_softc *sc, int word, int wordcnt, uint16_t *data) +{ + uint32_t reg, val; + int i; + + for (i = 0; i < wordcnt; i++) { + /* Clear SK and DI. */ + reg = CSR_READ(sc,WMREG_EECD) & ~(EECD_SK | EECD_DI); + CSR_WRITE(sc,WMREG_EECD, reg); + + /* Set CHIP SELECT. */ + reg |= EECD_CS; + CSR_WRITE(sc,WMREG_EECD, reg); + rtems_bsp_delay(2); + + /* Shift in the READ command. */ + wm_eeprom_sendbits(sc, UWIRE_OPC_READ, 3); + + /* Shift in address. */ + wm_eeprom_sendbits(sc, word + i, sc->sc_ee_addrbits); + + /* Shift out the data. */ + wm_eeprom_recvbits(sc, &val, 16); + data[i] = val & 0xffff; + + /* Clear CHIP SELECT. */ + reg = CSR_READ(sc,WMREG_EECD) & ~EECD_CS; + CSR_WRITE(sc,WMREG_EECD, reg); + rtems_bsp_delay(2); + } + return (0); +} + +/* + * wm_acquire_eeprom: + * + * Perform the EEPROM handshake required on some chips. + */ +static int wm_acquire_eeprom(struct wm_softc *sc) +{ + uint32_t reg; + int x; + + reg = CSR_READ(sc,WMREG_EECD); + + /* Request EEPROM access. */ + reg |= EECD_EE_REQ; + CSR_WRITE(sc,WMREG_EECD, reg); + + /* ..and wait for it to be granted. */ + for (x = 0; x < 100; x++) { + reg = CSR_READ(sc,WMREG_EECD); + if (reg & EECD_EE_GNT) break; + rtems_bsp_delay(500); + } + if ((reg & EECD_EE_GNT) == 0) { + printk("Could not acquire EEPROM GNT x= %d\n", x); + reg &= ~EECD_EE_REQ; + CSR_WRITE(sc,WMREG_EECD, reg); + return (1); + } + + return (0); +} + +/* + * wm_read_eeprom: + * + * Read data from the serial EEPROM. + * 82544EI does not Perform the EEPROM handshake + */ +static int wm_read_eeprom(struct wm_softc *sc, int word, int wordcnt, uint16_t *data) +{ +#if 0 + /* base on the datasheet, this does not seem to be applicable */ + if (wm_acquire_eeprom(sc)) + return(1); +#endif + return(wm_read_eeprom_uwire(sc, word, wordcnt, data)); +} + +/* + * wm_add_rxbuf: + * + * Add a receive buffer to the indiciated descriptor. + */ +static int wm_add_rxbuf(struct wm_softc *sc, int idx) +{ + struct mbuf *m; + + MGETHDR(m, M_WAIT, MT_DATA); + if (m == NULL) return (ENOBUFS); + MCLGET(m, M_WAIT); + if ((m->m_flags & M_EXT) == 0) { + m_freem(m); + return (ENOBUFS); + } + m->m_pkthdr.rcvif = &sc->arpcom.ac_if; + sc->rxs_mbuf[idx] = m; + /* m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;*/ + wm_init_rxdesc(sc, idx); +#if 0 + printk("sc->rxs_mbuf[%d]= 0x%x, mbuf @ 0x%x\n", + idx, sc->rxs_mbuf[idx], le32toh(sc->sc_rxdescs[idx].wrx_addr.wa_low)); +#endif + return(0); +} + +/* + * wm_set_ral: + * + * Set an entery in the receive address list. + */ +static void +wm_set_ral(struct wm_softc *sc, const uint8_t *enaddr, int idx) +{ + uint32_t ral_lo, ral_hi; + + if (enaddr != NULL) { + ral_lo = enaddr[0]|(enaddr[1] << 8)|(enaddr[2] << 16)|(enaddr[3] << 24); + ral_hi = enaddr[4] | (enaddr[5] << 8); + ral_hi |= RAL_AV; + } else { + ral_lo = 0; + ral_hi = 0; + } + + CSR_WRITE(sc,WMREG_RAL_LO(WMREG_CORDOVA_RAL_BASE, idx),ral_lo); + CSR_WRITE(sc,WMREG_RAL_HI(WMREG_CORDOVA_RAL_BASE, idx),ral_hi); +} + +/* + * wm_mchash: + * + * Compute the hash of the multicast address for the 4096-bit + * multicast filter. + */ +static uint32_t +wm_mchash(struct wm_softc *sc, const uint8_t *enaddr) +{ + static const int lo_shift[4] = { 4, 3, 2, 0 }; + static const int hi_shift[4] = { 4, 5, 6, 8 }; + uint32_t hash; + + hash = (enaddr[4] >> lo_shift[sc->sc_mchash_type]) | + (((uint16_t) enaddr[5]) << hi_shift[sc->sc_mchash_type]); + + return (hash & 0xfff); +} + +/* + * wm_set_filter: Set up the receive filter. + */ +static void wm_set_filter(struct wm_softc *sc) +{ + struct ifnet *ifp = &sc->arpcom.ac_if; + struct ether_multi *enm; + struct ether_multistep step; + uint32_t mta_reg; + uint32_t hash, reg, bit; + int i; + +#ifdef WM_DEBUG + printk("wm_set_filter("); +#endif + mta_reg = WMREG_CORDOVA_MTA; + sc->sc_rctl &= ~(RCTL_BAM | RCTL_UPE | RCTL_MPE); + + /* if (ifp->if_flags & IFF_BROADCAST)*/ + sc->sc_rctl |= RCTL_BAM; + if (ifp->if_flags & IFF_PROMISC) { + sc->sc_rctl |= RCTL_UPE; + goto allmulti; + } + + /* + * Set the station address in the first RAL slot, and + * clear the remaining slots. + */ + wm_set_ral(sc, sc->arpcom.ac_enaddr, 0); + for (i = 1; i < WM_RAL_TABSIZE; i++) + wm_set_ral(sc, NULL, i); + + /* Clear out the multicast table. */ + for (i = 0; i < WM_MC_TABSIZE; i++) + CSR_WRITE(sc,mta_reg + (i << 2), 0); + + ETHER_FIRST_MULTI(step, &sc->arpcom, enm); + while (enm != NULL) { + if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) { + /* + * We must listen to a range of multicast addresses. + * For now, just accept all multicasts, rather than + * trying to set only those filter bits needed to match + * the range. (At this time, the only use of address + * ranges is for IP multicast routing, for which the + * range is big enough to require all bits set.) + */ + goto allmulti; + } + + hash = wm_mchash(sc, enm->enm_addrlo); + + reg = (hash >> 5) & 0x7f; + bit = hash & 0x1f; + + hash = CSR_READ(sc,mta_reg + (reg << 2)); + hash |= 1U << bit; + + /* XXX Hardware bug?? */ + if ((reg & 0xe) == 1) { + bit = CSR_READ(sc,mta_reg + ((reg - 1) << 2)); + CSR_WRITE(sc,mta_reg + (reg << 2), hash); + CSR_WRITE(sc,mta_reg + ((reg - 1) << 2), bit); + } else + CSR_WRITE(sc,mta_reg + (reg << 2), hash); + + ETHER_NEXT_MULTI(step, enm); + } + + ifp->if_flags &= ~IFF_ALLMULTI; + goto setit; + + allmulti: + ifp->if_flags |= IFF_ALLMULTI; + sc->sc_rctl |= RCTL_MPE; + + setit: + CSR_WRITE(sc,WMREG_RCTL, sc->sc_rctl); + +#ifdef WM_DEBUG + printk("RCTL 0x%x)\n", CSR_READ(sc,WMREG_RCTL)); +#endif +} + +static void i82544EI_error(struct wm_softc *sc) +{ + struct ifnet *ifp = &sc->arpcom.ac_if; + unsigned long intr_status= sc->intr_errsts[sc->intr_err_ptr1++]; + + /* read and reset the status; because this is written + * by the ISR, we must disable interrupts here + */ + sc->intr_err_ptr1 %=INTR_ERR_SIZE; /* Till Straumann */ + if (intr_status) { + printk("Error %s%d:", ifp->if_name, ifp->if_unit); + if (intr_status & ICR_RXSEQ) { + printk("Rxq framing error (ICR= %x), if_ierrors %d\n", + intr_status, ifp->if_ierrors); + } + } + else + printk("%s%d: Ghost interrupt ?\n",ifp->if_name,ifp->if_unit); +} + +void i82544EI_printStats() +{ + i82544EI_stats(root_i82544EI_dev); +} + +/* The daemon does all of the work; RX, TX and cleaning up buffers/descriptors */ +static void i82544EI_daemon(void *arg) +{ + struct wm_softc *sc = (struct wm_softc*)arg; + rtems_event_set events; + struct mbuf *m=0; + struct ifnet *ifp=&sc->arpcom.ac_if; + +#ifdef WM_DEBUG + printk("i82544EI_daemon()\n"); +#endif + + /* NOTE: our creator possibly holds the bsdnet_semaphore. + * since that has PRIORITY_INVERSION enabled, our + * subsequent call to bsdnet_event_receive() will + * _not_ release it. It's still in posession of our + * owner. + * This is different from how killing this task + * is handled. + */ + + for (;;) { + /* sleep until there's work to be done */ + /* Note: bsdnet_event_receive() acquires + * the global bsdnet semaphore for + * mutual exclusion. + */ + rtems_bsdnet_event_receive(ALL_EVENTS, + RTEMS_WAIT | RTEMS_EVENT_ANY, + RTEMS_NO_TIMEOUT, + &events); + if (KILL_EVENT & events) break; + + if (events & RX_EVENT) i82544EI_rx(sc); + + /* clean up and try sending packets */ + do { + i82544EI_txq_done(sc); + + while (sc->txq_free>0) { + if (sc->txq_free>TXQ_HiLmt_OFF) { + IF_DEQUEUE(&ifp->if_snd,m); + if (m==0) break; + i82544EI_sendpacket(sc, m); + } + else { + i82544EI_txq_done(sc); + break; + } + if (events & RX_EVENT) i82544EI_rx(sc); + } + /* we leave this loop + * - either because there's no free buffer + * (m=0 initializer && !sc->txq_free) + * - or there's nothing to send (IF_DEQUEUE + * returned 0 + */ + } while (m && sc->txq_free); + + ifp->if_flags &= ~IFF_OACTIVE; + + /* Log errors and other uncommon events. */ + if (events & ERR_EVENT) i82544EI_error(sc); + /* Rx overrun */ + if ( events & INIT_EVENT) { + printk("Warnning, Rx overrun. Make sure the old mbuf was free\n"); + i82544EI_ifinit(arg); + } + + } /* end for(;;) { rtems_bsdnet_event_receive() .....*/ + + printf("out of daemon\n"); + ifp->if_flags &= ~(IFF_RUNNING|IFF_OACTIVE); + + /* shut down the hardware */ + i82544EI_stop_hw(sc); + /* flush the output queue */ + for (;;) { + IF_DEQUEUE(&ifp->if_snd,m); + if (!m) break; + m_freem(m); + } + /* as of 'rtems_bsdnet_event_receive()' we own the + * networking semaphore + */ + rtems_bsdnet_semaphore_release(); + rtems_semaphore_release(sc->daemonSync); + + /* Note that I dont use sc->daemonTid here - + * theoretically, that variable could already + * hold a newly created TID + */ + rtems_task_delete(RTEMS_SELF); +} |