URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libchip/] [network/] [sonic.c] - Rev 30
Go to most recent revision | Compare with Previous | Blame | View Log
/* * RTEMS NETWORK DRIVER FOR NATIONAL DP83932 `SONIC' * SYSTEMS-ORIENTED NETWORK INTERFACE CONTROLLER * * REUSABLE CHIP DRIVER * * References: * * 1) DP83932C-20/25/33 MHz SONIC(TM) Systems-Oriented Network Interface * Controller data sheet. TL/F/10492, RRD-B30M105, National Semiconductor, * 1995. * * 2) Software Driver Programmer's Guide for the DP83932 SONIC(TM), * Application Note 746, Wesley Lee and Mike Lui, TL/F/11140, * RRD-B30M75, National Semiconductor, March, 1991. * * COPYRIGHT (c) 1989-1997. * On-Line Applications Research Corporation (OAR). * Copyright assigned to U.S. Government, 1994. * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: sonic.c,v 1.2 2001-09-27 12:01:41 chris Exp $ * * This driver was originally written and tested on a DY-4 DMV177, * which had a 100 Mhz PPC603e. * * This driver also works with DP83934CVUL-20/25 MHz, tested on * Tharsys ERC32 VME board. * * Rehaul to fix lost interrupts and buffers, and to use to use * interrupt-free transmission by Jiri, 22/03/1999. */ #include <rtems.h> #include <rtems/rtems_bsdnet.h> #include <libchip/sonic.h> #include <stdio.h> #include <errno.h> #include <rtems/error.h> #include <sys/param.h> #include <sys/mbuf.h> #include <sys/socket.h> #include <sys/sockio.h> #include <sys/sockio.h> #include <net/if.h> #include <netinet/in.h> #include <netinet/if_ether.h> /* * XXX fix this */ void *set_vector(void *, unsigned32, unsigned32); #if (SONIC_DEBUG & SONIC_DEBUG_DUMP_MBUFS) #include <rtems/dumpbuf.h> #endif /* * Use the top line if you want more symbols. */ #define SONIC_STATIC /* #define SONIC_STATIC static */ /* * Number of devices supported by this driver */ #ifndef NSONIC # define NSONIC 1 #endif /* * * As suggested by National Application Note 746, make the * receive resource area bigger than the receive descriptor area. * * NOTE: Changing this may break this driver since it currently * assumes a 1<->1 mapping. */ #define RRA_EXTRA_COUNT 0 /* * RTEMS event used by interrupt handler to signal daemons. */ #define INTERRUPT_EVENT RTEMS_EVENT_1 /* * RTEMS event used to start transmit daemon. * This must not be the same as INTERRUPT_EVENT. */ #define START_TRANSMIT_EVENT RTEMS_EVENT_2 /* * Largest Ethernet frame. */ #define MAXIMUM_FRAME_SIZE 1518 /* * Receive buffer size. * Allow for a pointer, plus a full ethernet frame (including Frame * Check Sequence) rounded up to a 4-byte boundary. */ #define RBUF_SIZE ((sizeof (void *) + (MAXIMUM_FRAME_SIZE) + 3) & ~3) /* #define RBUF_WC ((((MAXIMUM_FRAME_SIZE) + 3) & ~3) / 2) */ #define RBUF_WC (RBUF_SIZE / 2) /* * Macros for manipulating 32-bit pointers as 16-bit fragments */ #define LSW(p) ((rtems_unsigned16)((rtems_unsigned32)(p))) #define MSW(p) ((rtems_unsigned16)((rtems_unsigned32)(p) >> 16)) #define PTR(m,l) ((void*)(((rtems_unsigned16)(m)<<16)|(rtems_unsigned16)(l))) /* * Hardware-specific storage */ struct sonic_softc { /* * Connection to networking code * This entry *must* be the first in the sonic_softc structure. */ struct arpcom arpcom; /* * Default location of device registers * ===CACHE=== * This area must be non-cacheable, guarded. */ void *sonic; /* * Register access routines */ sonic_write_register_t write_register; sonic_read_register_t read_register; /* * Interrupt vector */ rtems_vector_number vector; /* * Data Configuration Register values */ rtems_unsigned32 dcr_value; rtems_unsigned32 dc2_value; /* * Indicates configuration */ int acceptBroadcast; /* * Task waiting for interrupts */ rtems_id rxDaemonTid; rtems_id txDaemonTid; /* * Receive resource area */ int rdaCount; ReceiveResourcePointer_t rsa; ReceiveResourcePointer_t rea; CamDescriptorPointer_t cdp; ReceiveDescriptorPointer_t rda; ReceiveDescriptorPointer_t rdp_last; /* * Transmit descriptors */ int tdaCount; TransmitDescriptorPointer_t tdaHead; /* Last filled */ TransmitDescriptorPointer_t tdaTail; /* Next to retire */ /* * Statistics */ unsigned long Interrupts; unsigned long rxInterrupts; unsigned long rxMissed; unsigned long rxGiant; unsigned long rxNonOctet; unsigned long rxBadCRC; unsigned long rxCollision; unsigned long txInterrupts; unsigned long txSingleCollision; unsigned long txMultipleCollision; unsigned long txCollision; unsigned long txDeferred; unsigned long txUnderrun; unsigned long txLateCollision; unsigned long txExcessiveCollision; unsigned long txExcessiveDeferral; unsigned long txLostCarrier; unsigned long txRawWait; }; SONIC_STATIC struct sonic_softc sonic_softc[NSONIC]; /* ****************************************************************** * * * Debug Routines * * * ****************************************************************** */ #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY_DESCRIPTORS) void sonic_print_tx_descriptor( TransmitDescriptorPointer_t tdp ) { printf( "TXD ==> %p", tdp ); printf( " pkt_config = 0x%04x", tdp->pkt_config & 0xffff); printf( " pkt_size = 0x%04x\n", tdp->pkt_size & 0xffff ); printf( " frag_count = %d", tdp->frag_count & 0xffff ); /* could print all the fragments */ printf( " next = %p", tdp->next ); printf( " linkp = %p\n", tdp->linkp ); printf( " mbufp = %p", tdp->mbufp ); if ( tdp->mbufp ) printf( " mbufp->data = %p", mtod ( tdp->mbufp, void *) ); puts(""); } void sonic_print_rx_descriptor( ReceiveDescriptorPointer_t rdp ) { printf( "RXD ==> %p\n", rdp ); printf( " status = 0x%04x", rdp->status & 0xffff ); printf( " byte_count = 0x%04x\n", rdp->byte_count & 0xffff ); printf( " pkt = 0x%04x%04x", rdp->pkt_msw, rdp->pkt_lsw ); printf( " seq_no = %d", rdp->seq_no ); printf( " link = %d\n", rdp->link ); printf( " in_use = %d", rdp->in_use ); printf( " next = %p", rdp->next ); printf( " mbufp = %p", rdp->mbufp ); if ( rdp->mbufp ) printf( " mbufp->data = %p", mtod ( rdp->mbufp, void *) ); puts(""); } #endif /* ****************************************************************** * * * Support Routines * * * ****************************************************************** */ void sonic_enable_interrupts( struct sonic_softc *sc, unsigned32 mask ) { void *rp = sc->sonic; rtems_interrupt_level level; rtems_interrupt_disable( level ); (*sc->write_register)( rp, SONIC_REG_IMR, (*sc->read_register)(rp, SONIC_REG_IMR) | mask ); rtems_interrupt_enable( level ); } void sonic_disable_interrupts( struct sonic_softc *sc, unsigned32 mask ) { void *rp = sc->sonic; rtems_interrupt_level level; rtems_interrupt_disable( level ); (*sc->write_register)( rp, SONIC_REG_IMR, (*sc->read_register)(rp, SONIC_REG_IMR) & ~mask ); rtems_interrupt_enable( level ); } void sonic_clear_interrupts( struct sonic_softc *sc, unsigned32 mask ) { void *rp = sc->sonic; rtems_interrupt_level level; rtems_interrupt_disable( level ); (*sc->write_register)( rp, SONIC_REG_ISR, mask); rtems_interrupt_enable( level ); } void sonic_command( struct sonic_softc *sc, unsigned32 mask ) { void *rp = sc->sonic; rtems_interrupt_level level; rtems_interrupt_disable( level ); (*sc->write_register)( rp, SONIC_REG_CR, mask); rtems_interrupt_enable( level ); } /* * Allocate non-cacheable memory on a single 64k page. * Very simple minded -- just keeps trying till the memory is on a single page. */ SONIC_STATIC void * sonic_allocate(unsigned int nbytes) { void *p; unsigned long a1, a2; for (;;) { /* * ===CACHE=== * Change malloc to malloc_noncacheable_guarded. */ p = malloc( nbytes, M_MBUF, M_NOWAIT ); if (p == NULL) rtems_panic ("No memory!"); memset (p, '\0', nbytes); a1 = (unsigned long)p; a2 = a1 + nbytes - 1; if ((a1 >> 16) == (a2 >> 16)) break; } #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY_ALLOCATE) printf( "sonic_allocate %d bytes at %p\n", nbytes, p ); #endif return p; } /* * Shut down the interface. */ SONIC_STATIC void sonic_stop (struct sonic_softc *sc) { struct ifnet *ifp = &sc->arpcom.ac_if; ifp->if_flags &= ~IFF_RUNNING; /* * Stop the transmitter and receiver. */ sonic_command(sc, CR_HTX | CR_RXDIS ); } /* * Show interface statistics */ SONIC_STATIC void sonic_stats (struct sonic_softc *sc) { printf (" Total Interrupts:%-8lu", sc->Interrupts); printf (" Rx Interrupts:%-8lu", sc->rxInterrupts); printf (" Giant:%-8lu", sc->rxGiant); printf (" Non-octet:%-8lu\n", sc->rxNonOctet); printf (" Bad CRC:%-8lu", sc->rxBadCRC); printf (" Collision:%-8lu", sc->rxCollision); printf (" Missed:%-8lu\n", sc->rxMissed); printf ( " Tx Interrupts:%-8lu", sc->txInterrupts); printf ( " Deferred:%-8lu", sc->txDeferred); printf (" Lost Carrier:%-8lu\n", sc->txLostCarrier); printf ( "Single Collisions:%-8lu", sc->txSingleCollision); printf ( "Multiple Collisions:%-8lu", sc->txMultipleCollision); printf ("Excessive Collisions:%-8lu\n", sc->txExcessiveCollision); printf ( " Total Collisions:%-8lu", sc->txCollision); printf ( " Late Collision:%-8lu", sc->txLateCollision); printf (" Underrun:%-8lu\n", sc->txUnderrun); printf ( " Raw output wait:%-8lu\n", sc->txRawWait); } /* ****************************************************************** * * * Interrupt Handler * * * ****************************************************************** */ SONIC_STATIC rtems_isr sonic_interrupt_handler (rtems_vector_number v) { struct sonic_softc *sc = sonic_softc; unsigned32 isr, imr; void *rp; #if (NSONIC > 1) /* * Find the device which requires service */ for (;;) { if (sc->vector == v) break; if (++sc == &sonic[NSONIC]) return; /* Spurious interrupt? */ } #endif /* NSONIC > 1 */ /* * Get pointer to SONIC registers */ rp = sc->sonic; sc->Interrupts++; isr = (*sc->read_register)( rp, SONIC_REG_ISR ); imr = (*sc->read_register)( rp, SONIC_REG_IMR ); /* * Packet received or receive buffer area exceeded? */ if (imr & isr & (IMR_PRXEN | IMR_RBAEEN)) { imr &= ~(IMR_PRXEN | IMR_RBAEEN); sc->rxInterrupts++; rtems_event_send (sc->rxDaemonTid, INTERRUPT_EVENT); (*sc->write_register)( rp, SONIC_REG_IMR, imr ); (*sc->write_register)( rp, SONIC_REG_ISR, isr & ISR_PKTRX ); } /* * Packet started, transmitter done or transmitter error? * TX interrupts only occur after an error or when all TDA's are * exhausted and we are waiting for buffer to come free. */ if (imr & isr & (IMR_PINTEN | IMR_TXEREN)) { sc->txInterrupts++; rtems_event_send (sc->txDaemonTid, INTERRUPT_EVENT); (*sc->write_register)( rp, SONIC_REG_ISR, ISR_PINT | ISR_TXDN | ISR_TXER ); } } /* ****************************************************************** * * * Transmitter Routines * * * ****************************************************************** */ /* * Soak up transmit descriptors that have been sent. */ SONIC_STATIC void sonic_retire_tda (struct sonic_softc *sc) { rtems_unsigned16 status; unsigned int collisions; struct mbuf *m, *n; /* * Repeat for all completed transmit descriptors. */ while ((status = sc->tdaTail->status) != 0) { #if (SONIC_DEBUG & SONIC_DEBUG_DESCRIPTORS) printf( "retire TDA %p (0x%04x)\n", sc->tdaTail, status ); #endif #if (SONIC_DEBUG & SONIC_DEBUG_ERRORS) /* * If there is an error that was not a collision, * then someone may want to see it. */ if ( (status & ~(TDA_STATUS_COLLISION_MASK|TDA_STATUS_DEF)) != 0x0001 ) printf( "ERROR: retire TDA %p (0x%08x)\n", sc->tdaTail, sc->tdaTail->status ); #endif /* * Check for errors which stop the transmitter. */ if (status & (TDA_STATUS_EXD | TDA_STATUS_EXC | TDA_STATUS_FU | TDA_STATUS_BCM)) { /* * Restart the transmitter if there are * packets waiting to go. */ rtems_unsigned16 link; #if (SONIC_DEBUG & SONIC_DEBUG_ERRORS) printf("restarting sonic after error\n"); #endif link = *(sc->tdaTail->linkp); if ((link & TDA_LINK_EOL) == 0) { void *rp = sc->sonic; (*sc->write_register)( rp, SONIC_REG_CTDA, link ); sonic_command(sc, CR_TXP ); } } /* * Update network statistics */ collisions = (status & TDA_STATUS_COLLISION_MASK) >> TDA_STATUS_COLLISION_SHIFT; if (collisions) { if (collisions == 1) sc->txSingleCollision++; else sc->txMultipleCollision++; sc->txCollision += collisions; } if (status & TDA_STATUS_EXC) sc->txExcessiveCollision++; if (status & TDA_STATUS_OWC) sc->txLateCollision++; if (status & TDA_STATUS_EXD) sc->txExcessiveDeferral++; if (status & TDA_STATUS_DEF) sc->txDeferred++; if (status & TDA_STATUS_FU) sc->txUnderrun++; if (status & TDA_STATUS_CRSL) sc->txLostCarrier++; /* * Free the packet and reset a couple of fields */ m = sc->tdaTail->mbufp; while ( m ) { MFREE(m, n); m = n; } /* sc->tdaTail->frag[0].frag_link = LSW(sc->tdaTail->link_pad); sc->tdaTail->frag_count = 0; */ sc->tdaTail->status = 0; /* * Move to the next transmit descriptor */ sc->tdaTail = sc->tdaTail->next; #if (SONIC_DEBUG & SONIC_DEBUG_DESCRIPTORS) printf( "next TDA %p\n", sc->tdaTail ); #endif } } /* * Send packet */ SONIC_STATIC void sonic_sendpacket (struct ifnet *ifp, struct mbuf *m) { struct sonic_softc *sc = ifp->if_softc; struct mbuf *l = NULL; TransmitDescriptorPointer_t tdp; volatile struct TransmitDescriptorFragLink *fp; unsigned int packetSize; int i; rtems_event_set events; static char padBuf[64]; /* printf( "sonic_sendpacket %p\n", m ); */ /* * Wait for transmit descriptor to become available. Only retire TDA's * if there are no more free buffers to minimize TX latency. Retire TDA'a * on the way out. */ while (sc->tdaHead->next->status != 0) { /* * Free up transmit descriptors */ sonic_retire_tda (sc); if (sc->tdaHead->next->status == 0) break; #if (SONIC_DEBUG & SONIC_DEBUG_ERRORS) printf("blocking until TDAs are available\n"); #endif /* * Enable PINT interrupts. sonic_clear_interrupts( sc, ISR_PINT ); sonic_enable_interrupts( sc, IMR_PINTEN ); */ /* * Wait for PINT TX interrupt. Every fourth TX buffer will raise PINT. */ rtems_bsdnet_event_receive (INTERRUPT_EVENT, RTEMS_WAIT|RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &events); sonic_disable_interrupts( sc, IMR_PINTEN ); sonic_retire_tda (sc); } /* * Fill in the transmit descriptor fragment descriptors. * ===CACHE=== * If data cache is operating in write-back mode, flush cached * data to memory. */ tdp = sc->tdaHead->next; tdp->mbufp = m; packetSize = 0; fp = tdp->frag; for (i = 0 ; i < MAXIMUM_FRAGS_PER_DESCRIPTOR ; i++, fp++) { /* * Throw away empty mbufs */ if (m->m_len) { void *p = mtod (m, void *); fp->frag_lsw = LSW(p); fp->frag_msw = MSW(p); fp->frag_size = m->m_len; packetSize += m->m_len; #if (SONIC_DEBUG & SONIC_DEBUG_FRAGMENTS) printf( "fp %p 0x%04x%04x %d=%d .. %d\n", fp, fp->frag_msw, fp->frag_lsw, fp->frag_size, m->m_len, packetSize ); #endif #if (SONIC_DEBUG & SONIC_DEBUG_DUMP_TX_MBUFS) Dump_Buffer( p, (fp->frag_size > MAXIMUM_FRAME_SIZE) ? MAXIMUM_FRAME_SIZE : fp->frag_size ); #endif l = m; m = m->m_next; } else { struct mbuf *n; MFREE (m, n); m = n; if (l != NULL) l->m_next = m; } /* * Break out of the loop if this mbuf is the last in the frame. */ if (m == NULL) break; } /* * Pad short packets. */ if ((packetSize < 64) && (i < MAXIMUM_FRAGS_PER_DESCRIPTOR)) { int padSize = 64 - packetSize; fp++; fp->frag_lsw = LSW(padBuf); fp->frag_msw = MSW(padBuf); fp->frag_size = padSize; #if (SONIC_DEBUG & SONIC_DEBUG_FRAGMENTS) printf( "PAD fp %p 0x%04x%04x %d\n", fp, fp->frag_msw, fp->frag_lsw, fp->frag_size ); #endif packetSize += padSize; i++; } /* * Fill Transmit Descriptor */ tdp->pkt_size = packetSize; tdp->frag_count = i + 1; tdp->status = 0; /* * Chain onto list and start transmission. */ tdp->linkp = &(fp+1)->frag_link; *tdp->linkp = LSW(tdp->next) | TDA_LINK_EOL; if ( sc->tdaHead->frag_count ) *sc->tdaHead->linkp &= ~TDA_LINK_EOL; sc->tdaHead = tdp; /* Start transmission */ sonic_command(sc, CR_TXP ); /* * Free up transmit descriptors on the way out. */ sonic_retire_tda (sc); } /* * Driver transmit daemon */ SONIC_STATIC void sonic_txDaemon (void *arg) { struct sonic_softc *sc = (struct sonic_softc *)arg; struct ifnet *ifp = &sc->arpcom.ac_if; struct mbuf *m; rtems_event_set events; for (;;) { /* * Wait for packet */ rtems_bsdnet_event_receive ( START_TRANSMIT_EVENT, RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT, &events ); /* * Send packets till queue is empty */ for (;;) { /* * Get the next mbuf chain to transmit. */ IF_DEQUEUE(&ifp->if_snd, m); if (!m) break; sonic_sendpacket (ifp, m); } ifp->if_flags &= ~IFF_OACTIVE; } } /* ****************************************************************** * * * Receiver Routines * * * ****************************************************************** */ /* * Wait for SONIC to hand over a Receive Descriptor. */ SONIC_STATIC void sonic_rda_wait( struct sonic_softc *sc, ReceiveDescriptorPointer_t rdp ) { int i; void *rp = sc->sonic; rtems_event_set events; /* * Wait for Receive Descriptor. * The order of the tests is very important. * The RDA is checked after RBAE is detected. This ensures that * the driver processes all RDA entries before reusing the RRA * entry holding the giant packet. * The event wait is done after the RDA and RBAE checks. This * catches the possibility that a Receive Descriptor became ready * between the call to this function and the clearing of the * interrupt status register bit. */ for (;;) { /* * Has a giant packet arrived? * The National DP83932C data sheet is very vague on what * happens under this condition. The description of the * Interrupt Status Register (Section 4.3.6) states, * ``Reception is aborted and the SONIC fetches the next * available resource descriptors in the RRA. The buffer * space is not re-used and an RDA is not setup for the * truncated packet.'' * I take ``Reception is aborted'' to mean that the RXEN * bit in the Command Register is cleared and must be set * by the driver to begin reception again. * Unfortunately, an alternative interpretation could be * that only reception of the current packet is aborted. * This would be more difficult to recover from.... */ if ((*sc->read_register)( rp, SONIC_REG_ISR ) & ISR_RBAE) { #if (SONIC_DEBUG & SONIC_DEBUG_ERRORS) printf( "ERROR: looks like a giant packet -- RBAE\n" ); #endif /* * One more check to soak up any Receive Descriptors * that may already have been handed back to the driver. */ if (rdp->in_use == RDA_IN_USE) { #if (SONIC_DEBUG & SONIC_DEBUG_ERRORS) printf( "ERROR: nope just an RBAE\n" ); #endif break; } /* * Check my interpretation of the SONIC manual. */ if ((*sc->read_register)( rp, SONIC_REG_CR ) & CR_RXEN) rtems_panic ("SONIC RBAE/RXEN"); /* * Update statistics */ sc->rxGiant++; /* * Reuse receive buffer. * Again, the manual is subject to interpretation. The * RRP register is described as, `the lower address of * the next descriptor the SONIC will read.'' * Since, acording to the ISR/RBAE notes, the SONIC has * ``fetched the next available resource descriptor in * the RRA'', I interpret this to mean that that the * driver has to move the RRP back *two* entries to * reuse the receive buffer holding the giant packet. */ for (i = 0 ; i < 2 ; i++) { if ((*sc->read_register)( rp, SONIC_REG_RRP ) == (*sc->read_register)( rp, SONIC_REG_RSA )) (*sc->write_register)( rp, SONIC_REG_RRP, (*sc->read_register)( rp, SONIC_REG_REA ) ); (*sc->write_register)( rp, SONIC_REG_RRP, (*sc->read_register)(rp, SONIC_REG_RRP) - sizeof(ReceiveResource_t) ); } /* * Restart reception */ sonic_clear_interrupts( sc, ISR_RBAE ); sonic_command( sc, CR_RXEN ); } /* * Has Receive Descriptor become available? */ if (rdp->in_use == RDA_IN_USE) break; /* * Enable interrupts. */ sonic_enable_interrupts( sc, (IMR_PRXEN | IMR_RBAEEN) ); /* * Wait for interrupt. */ rtems_bsdnet_event_receive( INTERRUPT_EVENT, RTEMS_WAIT|RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &events ); } #if (SONIC_DEBUG & SONIC_DEBUG_DESCRIPTORS) printf( "RDA %p\n", rdp ); #endif #if (SONIC_DEBUG & SONIC_DEBUG_ERRORS) if (rdp->status & 0x000E) printf( "ERROR: RDA %p (0x%04x)\n", rdp, rdp->status ); #endif } /* * SONIC reader task */ SONIC_STATIC void sonic_rxDaemon (void *arg) { struct sonic_softc *sc = (struct sonic_softc *)arg; struct ifnet *ifp = &sc->arpcom.ac_if; void *rp = sc->sonic; struct mbuf *m; rtems_unsigned16 status; ReceiveDescriptorPointer_t rdp; ReceiveResourcePointer_t rwp, rea; rtems_unsigned16 newMissedTally, oldMissedTally; rwp = sc->rsa; rea = sc->rea; rdp = sc->rda; /* * Start the receiver */ oldMissedTally = (*sc->read_register)( rp, SONIC_REG_MPT ); /* * Input packet handling loop */ for (;;) { /* * Wait till SONIC supplies a Receive Descriptor. */ if (rdp->in_use == RDA_FREE) { sonic_rda_wait (sc, rdp); } #if (SONIC_DEBUG & SONIC_DEBUG_DESCRIPTORS) printf( "Incoming packet %p status=0x%04x\n", rdp, rdp->status ); #endif /* * Check that packet is valid */ status = rdp->status; if (status & RDA_STATUS_PRX) { struct ether_header *eh; void *p; /* * Pass the packet up the chain. * The mbuf count is reduced to remove * the frame check sequence at the end * of the packet. * ===CACHE=== * Invalidate cache entries for this memory. */ #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY_DESCRIPTORS) sonic_print_rx_descriptor( rdp ); if ((LSW(rdp->mbufp->m_data) != rdp->pkt_lsw) || (MSW(rdp->mbufp->m_data) != rdp->pkt_msw)) printf ("SONIC RDA/RRA %p, %08x\n",rdp->mbufp->m_data,(rdp->pkt_msw << 16) | (rdp->pkt_lsw & 0x0ffff)); #endif rdp->byte_count &= 0x0ffff; /* ERC32 pollutes msb of byte_count */ m = rdp->mbufp; m->m_len = m->m_pkthdr.len = rdp->byte_count - sizeof(rtems_unsigned32) - sizeof(struct ether_header); eh = mtod (m, struct ether_header *); m->m_data += sizeof(struct ether_header); #ifdef CPU_U32_FIX ipalign(m); /* Align packet on 32-bit boundary */ #endif #if (SONIC_DEBUG & SONIC_DEBUG_DUMP_RX_MBUFS) Dump_Buffer( (void *) eh, sizeof(struct ether_header) ); Dump_Buffer( (void *) m, 96 /* m->m_len*/ ); #endif /* printf( "ether_input %p\n", m ); */ /* printf( "pkt %p, seq %04x, mbuf %p, m_data %p\n", rdp, rdp->seq_no, m, m->m_data ); printf( "%u, %u\n", ((int*)m->m_data)[6], ((int*)m->m_data)[7]); */ ether_input (ifp, eh, m); /* */ /* * Sanity check that Receive Resource Area is * still in sync with Receive Descriptor Area * The buffer reported in the Receive Descriptor * should be the same as the buffer in the Receive * Resource we are about to reuse. */ /* XXX figure out whether this is valid or not */ #if 0 if ((LSW(p) != rwp->buff_ptr_lsw) || (MSW(p) != rwp->buff_ptr_msw)) rtems_panic ("SONIC RDA/RRA"); #endif /* * Allocate a new mbuf. */ MGETHDR (m, M_WAIT, MT_DATA); MCLGET (m, M_WAIT); m->m_pkthdr.rcvif = ifp; rdp->mbufp = m; p = mtod (m, void *); /* * Reuse Receive Resource. */ rwp->buff_ptr_lsw = LSW(p); rwp->buff_ptr_msw = MSW(p); rwp->buff_wc_lsw = RBUF_WC; rwp->buff_wc_msw = 0; rwp++; if (rwp == rea) { #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY) printf( "Wrapping RWP from %p to %p\n", rwp, sc->rsa ); #endif rwp = sc->rsa; } (*sc->write_register)( rp, SONIC_REG_RWP , LSW(rwp) ); /* * Tell the SONIC to reread the RRA. */ if ((*sc->read_register)( rp, SONIC_REG_ISR ) & ISR_RBE) sonic_clear_interrupts( sc, ISR_RBE ); } else { if (status & RDA_STATUS_COL) sc->rxCollision++; if (status & RDA_STATUS_FAER) sc->rxNonOctet++; else if (status & RDA_STATUS_CRCR) sc->rxBadCRC++; } /* * Count missed packets */ newMissedTally = (*sc->read_register)( rp, SONIC_REG_MPT ); if (newMissedTally != oldMissedTally) { sc->rxMissed += (newMissedTally - oldMissedTally) & 0xFFFF; newMissedTally = oldMissedTally; } /* * Move to next receive descriptor and update EOL */ rdp->link |= RDA_LINK_EOL; rdp->in_use = RDA_FREE; sc->rdp_last->link &= ~RDA_LINK_EOL; sc->rdp_last = rdp; rdp = rdp->next; } } /* ****************************************************************** * * * Initialization Routines * * * ****************************************************************** */ /* * Initialize the SONIC hardware */ SONIC_STATIC void sonic_initialize_hardware(struct sonic_softc *sc) { void *rp = sc->sonic; int i; unsigned char *hwaddr; rtems_isr_entry old_handler; TransmitDescriptorPointer_t tdp; ReceiveDescriptorPointer_t ordp, rdp; ReceiveResourcePointer_t rwp; struct mbuf *m; void *p; CamDescriptorPointer_t cdp; /* * The Revision B SONIC has a horrible bug known as the "Zero * Length Packet bug". The initial board used to develop this * driver had a newer revision of the SONIC so there was no reason * to check for this. If you have the Revision B SONIC chip, then * you need to add some code to the RX path to handle this weirdness. */ if ( (*sc->read_register)( rp, SONIC_REG_SR ) <= SONIC_REVISION_B ) { rtems_fatal_error_occurred( 0x0BADF00D ); /* don't eat this part :) */ } /* * Set up circular linked list in Transmit Descriptor Area. * Use the PINT bit in the transmit configuration field to * request an interrupt on every other transmitted packet. * * NOTE: sonic_allocate() zeroes all of the memory allocated. */ sc->tdaTail = sonic_allocate(sc->tdaCount * sizeof *tdp); #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY) printf( "tdaTail = %p\n", sc->tdaTail ); #endif tdp = sc->tdaTail; for (i = 0 ; i < sc->tdaCount ; i++) { /* * Start off with the table of outstanding mbuf's */ /* * status, pkt_config, pkt_size, and all fragment fields * are set to zero by sonic_allocate. */ /* XXX not used by the BSD drivers tdp->frag[0].frag_link = LSW(tdp + 1); */ if (i & 3) tdp->pkt_config = TDA_CONFIG_PINT; tdp->status = 0; tdp->frag_count = 0; tdp->link_pad = LSW(tdp + 1) | TDA_LINK_EOL; tdp->linkp = &((tdp + 1)->frag[0].frag_link); tdp->next = (TransmitDescriptor_t *)(tdp + 1); #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY_DESCRIPTORS) sonic_print_tx_descriptor( tdp ); #endif tdp++; } tdp--; sc->tdaHead = tdp; tdp->link_pad = LSW(sc->tdaTail) | TDA_LINK_EOL; tdp->next = (TransmitDescriptor_t *)sc->tdaTail; tdp->linkp = &sc->tdaTail->frag[0].frag_link; /* * Set up circular linked list in Receive Descriptor Area. * Leaves sc->rda pointing at the `beginning' of the list. * * NOTE: The RDA and CDP must have the same MSW for their addresses. */ sc->rda = sonic_allocate( (sc->rdaCount * sizeof(ReceiveDescriptor_t)) + sizeof(CamDescriptor_t) ); sc->cdp = (CamDescriptorPointer_t) ((unsigned char *)sc->rda + (sc->rdaCount * sizeof(ReceiveDescriptor_t))); #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY) printf( "rda area = %p\n", sc->rda ); printf( "cdp area = %p\n", sc->cdp ); #endif ordp = rdp = sc->rda; for (i = 0 ; i < sc->rdaCount ; i++) { /* * status, byte_count, pkt_ptr0, pkt_ptr1, and seq_no are set * to zero by sonic_allocate. */ rdp->link = LSW(rdp + 1); rdp->in_use = RDA_FREE; rdp->next = (ReceiveDescriptor_t *)(rdp + 1); ordp = rdp; rdp++; } /* * Link the last desriptor to the 1st one and mark it as the end * of the list. */ ordp->next = sc->rda; ordp->link = LSW(sc->rda) | RDA_LINK_EOL; sc->rdp_last = ordp; /* * Allocate the receive resource area. * In accordance with National Application Note 746, make the * receive resource area bigger than the receive descriptor area. * This has the useful side effect of making the receive resource * area big enough to hold the CAM descriptor area. */ sc->rsa = sonic_allocate((sc->rdaCount + RRA_EXTRA_COUNT) * sizeof *sc->rsa); #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY) printf( "rsa area = %p\n", sc->rsa ); #endif /* * Set up list in Receive Resource Area. * Allocate space for incoming packets. */ rwp = sc->rsa; for (i = 0 ; i < (sc->rdaCount + RRA_EXTRA_COUNT) ; i++, rwp++) { /* * Allocate memory for buffer. * Place a pointer to the mbuf at the beginning of the buffer * so we can find the mbuf when the SONIC returns the buffer * to the driver. */ MGETHDR (m, M_WAIT, MT_DATA); MCLGET (m, M_WAIT); m->m_pkthdr.rcvif = &sc->arpcom.ac_if; sc->rda[i].mbufp = m; p = mtod (m, void *); /* * Set up RRA entry */ rwp->buff_ptr_lsw = LSW(p); rwp->buff_ptr_msw = MSW(p); rwp->buff_wc_lsw = RBUF_WC; rwp->buff_wc_msw = 0; #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY_DESCRIPTORS) sonic_print_rx_descriptor( &sc->rda[i] ); #endif } sc->rea = rwp; #if (SONIC_DEBUG & SONIC_DEBUG_MEMORY) printf( "rea area = %p\n", sc->rea ); #endif /* * Issue a software reset. */ (*sc->write_register)( rp, SONIC_REG_CR, CR_RST | CR_STP | CR_RXDIS | CR_HTX ); /* * Set up data configuration registers. */ (*sc->write_register)( rp, SONIC_REG_DCR, sc->dcr_value ); (*sc->write_register)( rp, SONIC_REG_DCR2, sc->dc2_value ); (*sc->write_register)( rp, SONIC_REG_CR, CR_STP | CR_RXDIS | CR_HTX ); /* * Mask all interrupts */ (*sc->write_register)( rp, SONIC_REG_IMR, 0x0 ); /* XXX was backwards */ /* * Clear outstanding interrupts. */ (*sc->write_register)( rp, SONIC_REG_ISR, 0x7FFF ); /* * Clear the tally counters */ (*sc->write_register)( rp, SONIC_REG_CRCT, 0xFFFF ); (*sc->write_register)( rp, SONIC_REG_FAET, 0xFFFF ); (*sc->write_register)( rp, SONIC_REG_MPT, 0xFFFF ); (*sc->write_register)( rp, SONIC_REG_RSC, 0 ); /* * Set the Receiver mode * * Enable/disable reception of broadcast packets */ if (sc->acceptBroadcast) (*sc->write_register)( rp, SONIC_REG_RCR, RCR_BRD ); else (*sc->write_register)( rp, SONIC_REG_RCR, 0 ); /* * Set up Resource Area pointers */ (*sc->write_register)( rp, SONIC_REG_URRA, MSW(sc->rsa) ); (*sc->write_register)( rp, SONIC_REG_RSA, LSW(sc->rsa) ); (*sc->write_register)( rp, SONIC_REG_REA, LSW(sc->rea) ); (*sc->write_register)( rp, SONIC_REG_RRP, LSW(sc->rsa) ); (*sc->write_register)( rp, SONIC_REG_RWP, LSW(sc->rsa) ); /* XXX was rea */ (*sc->write_register)( rp, SONIC_REG_URDA, MSW(sc->rda) ); (*sc->write_register)( rp, SONIC_REG_CRDA, LSW(sc->rda) ); (*sc->write_register)( rp, SONIC_REG_UTDA, MSW(sc->tdaTail) ); (*sc->write_register)( rp, SONIC_REG_CTDA, LSW(sc->tdaTail) ); /* * Set End Of Buffer Count register to the value recommended * in Note 1 of Section 3.4.4.4 of the SONIC data sheet. */ (*sc->write_register)( rp, SONIC_REG_EOBC, RBUF_WC - 2 ); /* * Issue the load RRA command */ (*sc->write_register)( rp, SONIC_REG_CR, CR_RRRA ); while ((*sc->read_register)( rp, SONIC_REG_CR ) & CR_RRRA) continue; /* * Remove device reset */ (*sc->write_register)( rp, SONIC_REG_CR, 0 ); /* * Set up the SONIC CAM with our hardware address. */ hwaddr = sc->arpcom.ac_enaddr; cdp = sc->cdp; #if (SONIC_DEBUG & SONIC_DEBUG_CAM) printf( "hwaddr: %2x:%2x:%2x:%2x:%2x:%2x\n", hwaddr[0], hwaddr[1], hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5] ); #endif cdp->cep = 0; /* Fill first and only entry in CAM */ cdp->cap0 = hwaddr[1] << 8 | hwaddr[0]; cdp->cap1 = hwaddr[3] << 8 | hwaddr[2]; cdp->cap2 = hwaddr[5] << 8 | hwaddr[4]; cdp->ce = 0x0001; /* Enable first entry in CAM */ (*sc->write_register)( rp, SONIC_REG_CDC, 1 ); /* 1 entry in CDA */ (*sc->write_register)( rp, SONIC_REG_CDP, LSW(cdp) ); (*sc->write_register)( rp, SONIC_REG_CR, CR_LCAM ); /* Load the CAM */ while ((*sc->read_register)( rp, SONIC_REG_CR ) & CR_LCAM) continue; /* * Verify that CAM was properly loaded. */ (*sc->write_register)( rp, SONIC_REG_CR, CR_RST | CR_STP | CR_RXDIS | CR_HTX ); #if (SONIC_DEBUG & SONIC_DEBUG_CAM) (*sc->write_register)( rp, SONIC_REG_CEP, 0 ); /* Select first entry in CAM */ printf ("Loaded Ethernet address into SONIC CAM.\n" " Wrote %04x%04x%04x - %#x\n" " Read %04x%04x%04x - %#x\n", cdp->cap2, cdp->cap1, cdp->cap0, cdp->ce, (*sc->read_register)( rp, SONIC_REG_CAP2 ), (*sc->read_register)( rp, SONIC_REG_CAP1 ), (*sc->read_register)( rp, SONIC_REG_CAP0 ), (*sc->read_register)( rp, SONIC_REG_CE )); (*sc->write_register)( rp, SONIC_REG_CEP, 0 ); /* Select first entry in CAM */ if (((*sc->read_register)( rp, SONIC_REG_CAP2 ) != cdp->cap2) || ((*sc->read_register)( rp, SONIC_REG_CAP1 ) != cdp->cap1) || ((*sc->read_register)( rp, SONIC_REG_CAP0 ) != cdp->cap0) || ((*sc->read_register)( rp, SONIC_REG_CE ) != cdp->ce)) { printf ("Failed to load Ethernet address into SONIC CAM.\n" " Wrote %04x%04x%04x - %#x\n" " Read %04x%04x%04x - %#x\n", cdp->cap2, cdp->cap1, cdp->cap0, cdp->ce, (*sc->read_register)( rp, SONIC_REG_CAP2 ), (*sc->read_register)( rp, SONIC_REG_CAP1 ), (*sc->read_register)( rp, SONIC_REG_CAP0 ), (*sc->read_register)( rp, SONIC_REG_CE )); rtems_panic ("SONIC LCAM"); } #endif (*sc->write_register)(rp, SONIC_REG_CR, /* CR_TXP | */CR_RXEN | CR_STP); /* * Attach SONIC interrupt handler */ /* XXX (*sc->write_register)( rp, SONIC_REG_IMR, 0 ); */ old_handler = set_vector(sonic_interrupt_handler, sc->vector, 1); /* * Remainder of hardware initialization is * done by the receive and transmit daemons. */ } /* * Send packet (caller provides header). */ SONIC_STATIC void sonic_start(struct ifnet *ifp) { struct sonic_softc *sc = ifp->if_softc; rtems_event_send(sc->txDaemonTid, START_TRANSMIT_EVENT); ifp->if_flags |= IFF_OACTIVE; } /* * Initialize and start the device */ SONIC_STATIC void sonic_init (void *arg) { struct sonic_softc *sc = arg; struct ifnet *ifp = &sc->arpcom.ac_if; void *rp = sc->sonic; int rcr; if (sc->txDaemonTid == 0) { /* * Set up SONIC hardware */ sonic_initialize_hardware (sc); /* * Start driver tasks */ sc->rxDaemonTid = rtems_bsdnet_newproc ("SNrx", 4096, sonic_rxDaemon, sc); sc->txDaemonTid = rtems_bsdnet_newproc ("SNtx", 4096, sonic_txDaemon, sc); } /* * Set flags appropriately */ rcr = (*sc->read_register)( rp, SONIC_REG_RCR ); if (ifp->if_flags & IFF_PROMISC) rcr |= RCR_PRO; else rcr &= ~RCR_PRO; (*sc->write_register)( rp, SONIC_REG_RCR, rcr); /* * Tell the world that we're running. */ ifp->if_flags |= IFF_RUNNING; /* * Enable receiver and transmitter */ sonic_enable_interrupts( sc, IMR_TXEREN | (IMR_PRXEN | IMR_RBAEEN) ); sonic_command( sc, CR_RXEN ); } /* * Driver ioctl handler */ static int sonic_ioctl (struct ifnet *ifp, int command, caddr_t data) { struct sonic_softc *sc = ifp->if_softc; int error = 0; switch (command) { case SIOCGIFADDR: case SIOCSIFADDR: ether_ioctl (ifp, command, data); break; case SIOCSIFFLAGS: switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { case IFF_RUNNING: sonic_stop (sc); break; case IFF_UP: sonic_init (sc); break; case IFF_UP | IFF_RUNNING: sonic_stop (sc); sonic_init (sc); break; default: break; } break; case SIO_RTEMS_SHOW_STATS: sonic_stats (sc); break; /* * FIXME: All sorts of multicast commands need to be added here! */ default: error = EINVAL; break; } return error; } /* * Attach an SONIC driver to the system * This is the only `extern' function in the driver. */ int rtems_sonic_driver_attach ( struct rtems_bsdnet_ifconfig *config, sonic_configuration_t *chip ) { struct sonic_softc *sc; struct ifnet *ifp; int mtu; int unitNumber; char *unitName; /* * Parse driver name */ if ((unitNumber = rtems_bsdnet_parse_driver_name (config, &unitName)) < 0) return 0; /* * Is driver free? */ if ((unitNumber <= 0) || (unitNumber > NSONIC)) { printf ("Bad SONIC unit number.\n"); return 0; } sc = &sonic_softc[unitNumber - 1]; ifp = &sc->arpcom.ac_if; if (ifp->if_softc != NULL) { printf ("Driver already in use.\n"); return 0; } /* * zero out the control structure */ memset( sc, 0, sizeof(*sc) ); /* * Process options */ if (config->hardware_address) { memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); } else { memset (sc->arpcom.ac_enaddr, 0x08, ETHER_ADDR_LEN); } if (config->mtu) mtu = config->mtu; else mtu = ETHERMTU; if (config->rbuf_count) sc->rdaCount = config->rbuf_count; else sc->rdaCount = chip->rda_count; if (config->xbuf_count) sc->tdaCount = config->xbuf_count; else sc->tdaCount = chip->tda_count; sc->acceptBroadcast = !config->ignore_broadcast; sc->sonic = (void *) chip->base_address; sc->vector = chip->vector; sc->dcr_value = chip->dcr_value; sc->dc2_value = chip->dc2_value; sc->write_register = chip->write_register; sc->read_register = chip->read_register; /* * Set up network interface values */ ifp->if_softc = sc; ifp->if_unit = unitNumber; ifp->if_name = unitName; ifp->if_mtu = mtu; ifp->if_init = sonic_init; ifp->if_ioctl = sonic_ioctl; ifp->if_start = sonic_start; ifp->if_output = ether_output; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; if (ifp->if_snd.ifq_maxlen == 0) ifp->if_snd.ifq_maxlen = ifqmaxlen; /* * Attach the interface */ if_attach (ifp); ether_ifattach (ifp); return 1; } #if (SONIC_DEBUG & SONIC_DEBUG_PRINT_REGISTERS) #include <stdio.h> char SONIC_Reg_name[64][6]= { "CR", /* 0x00 */ "DCR", /* 0x01 */ "RCR", /* 0x02 */ "TCR", /* 0x03 */ "IMR", /* 0x04 */ "ISR", /* 0x05 */ "UTDA", /* 0x06 */ "CTDA", /* 0x07 */ "0x08", /* 0x08 */ "0x09", /* 0x09 */ "0x0A", /* 0x0A */ "0x0B", /* 0x0B */ "0x0C", /* 0x0C */ "URDA", /* 0x0D */ "CRDA", /* 0x0E */ "0x0F", /* 0x0F */ "0x10", /* 0x10 */ "0x11", /* 0x11 */ "0x12", /* 0x12 */ "EOBC", /* 0x13 */ "URRA", /* 0x14 */ "RSA", /* 0x15 */ "REA", /* 0x16 */ "RRP", /* 0x17 */ "RWP", /* 0x18 */ "0x19", /* 0x19 */ "0x1A", /* 0x1A */ "0x1B", /* 0x1B */ "0x1C", /* 0x1C */ "0x0D", /* 0x1D */ "0x1E", /* 0x1E */ "0x1F", /* 0x1F */ "0x20", /* 0x20 */ "CEP", /* 0x21 */ "CAP2", /* 0x22 */ "CAP1", /* 0x23 */ "CAP0", /* 0x24 */ "CE", /* 0x25 */ "CDP", /* 0x26 */ "CDC", /* 0x27 */ "SR", /* 0x28 */ "WT0", /* 0x29 */ "WT1", /* 0x2A */ "RSC", /* 0x2B */ "CRCT", /* 0x2C */ "FAET", /* 0x2D */ "MPT", /* 0x2E */ "MDT", /* 0x2F */ "0x30", /* 0x30 */ "0x31", /* 0x31 */ "0x32", /* 0x32 */ "0x33", /* 0x33 */ "0x34", /* 0x34 */ "0x35", /* 0x35 */ "0x36", /* 0x36 */ "0x37", /* 0x37 */ "0x38", /* 0x38 */ "0x39", /* 0x39 */ "0x3A", /* 0x3A */ "0x3B", /* 0x3B */ "0x3C", /* 0x3C */ "0x3D", /* 0x3D */ "0x3E", /* 0x3E */ "DCR2" /* 0x3F */ }; #endif
Go to most recent revision | Compare with Previous | Blame | View Log