[81d914d8] | 1 | /* |
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[050249d] | 2 | * Gaisler Research ethernet MAC driver |
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| 3 | * adapted from Opencores driver by Marko Isomaki |
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[81d914d8] | 4 | * |
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| 5 | * The license and distribution terms for this file may be |
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[3e25dfc8] | 6 | * found in the file LICENSE in this distribution or at |
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[c499856] | 7 | * http://www.rtems.org/license/LICENSE. |
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[81d914d8] | 8 | * |
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[050249d] | 9 | * 2007-09-07, Ported GBIT support from 4.6.5 |
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[81d914d8] | 10 | */ |
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| 11 | |
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| 12 | #include <rtems.h> |
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| 13 | #include <bsp.h> |
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| 14 | |
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[39671330] | 15 | #ifdef GRETH_SUPPORTED |
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| 16 | |
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[81d914d8] | 17 | #include <inttypes.h> |
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| 18 | #include <errno.h> |
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[050249d] | 19 | #include <rtems/bspIo.h> |
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[81d914d8] | 20 | #include <stdlib.h> |
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| 21 | #include <stdio.h> |
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| 22 | #include <stdarg.h> |
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| 23 | #include <rtems/error.h> |
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| 24 | #include <rtems/rtems_bsdnet.h> |
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| 25 | #include "greth.h" |
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| 26 | |
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| 27 | #include <sys/param.h> |
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| 28 | #include <sys/mbuf.h> |
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| 29 | |
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| 30 | #include <sys/socket.h> |
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| 31 | #include <sys/sockio.h> |
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| 32 | #include <net/if.h> |
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| 33 | #include <netinet/in.h> |
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| 34 | #include <netinet/if_ether.h> |
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| 35 | |
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| 36 | #ifdef malloc |
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| 37 | #undef malloc |
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| 38 | #endif |
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| 39 | #ifdef free |
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| 40 | #undef free |
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| 41 | #endif |
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| 42 | |
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[050249d] | 43 | /* #define GRETH_DEBUG */ |
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[81d914d8] | 44 | |
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| 45 | #ifdef CPU_U32_FIX |
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| 46 | extern void ipalign(struct mbuf *m); |
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| 47 | #endif |
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| 48 | |
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[39671330] | 49 | /* Used when reading from memory written by GRETH DMA unit */ |
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| 50 | #ifndef GRETH_MEM_LOAD |
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| 51 | #define GRETH_MEM_LOAD(addr) (*(volatile unsigned int *)(addr)) |
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| 52 | #endif |
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| 53 | |
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[81d914d8] | 54 | /* |
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| 55 | * Number of OCs supported by this driver |
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| 56 | */ |
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| 57 | #define NOCDRIVER 1 |
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| 58 | |
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| 59 | /* |
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| 60 | * Receive buffer size -- Allow for a full ethernet packet including CRC |
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| 61 | */ |
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| 62 | #define RBUF_SIZE 1518 |
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| 63 | |
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| 64 | #define ET_MINLEN 64 /* minimum message length */ |
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| 65 | |
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| 66 | /* |
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| 67 | * RTEMS event used by interrupt handler to signal driver tasks. |
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| 68 | * This must not be any of the events used by the network task synchronization. |
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| 69 | */ |
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| 70 | #define INTERRUPT_EVENT RTEMS_EVENT_1 |
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| 71 | |
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| 72 | /* |
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| 73 | * RTEMS event used to start transmit daemon. |
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| 74 | * This must not be the same as INTERRUPT_EVENT. |
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| 75 | */ |
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| 76 | #define START_TRANSMIT_EVENT RTEMS_EVENT_2 |
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| 77 | |
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| 78 | /* event to send when tx buffers become available */ |
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| 79 | #define GRETH_TX_WAIT_EVENT RTEMS_EVENT_3 |
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| 80 | |
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| 81 | #if (MCLBYTES < RBUF_SIZE) |
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| 82 | # error "Driver must have MCLBYTES > RBUF_SIZE" |
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| 83 | #endif |
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| 84 | |
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[050249d] | 85 | /* 4s Autonegotiation Timeout */ |
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| 86 | #ifndef GRETH_AUTONEGO_TIMEOUT_MS |
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| 87 | #define GRETH_AUTONEGO_TIMEOUT_MS 4000 |
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| 88 | #endif |
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[e6f327c] | 89 | const struct timespec greth_tan = { |
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| 90 | GRETH_AUTONEGO_TIMEOUT_MS/1000, |
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[e4b50853] | 91 | (GRETH_AUTONEGO_TIMEOUT_MS % 1000) *1000000 |
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[e6f327c] | 92 | }; |
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[050249d] | 93 | |
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| 94 | /* For optimizing the autonegotiation time */ |
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| 95 | #define GRETH_AUTONEGO_PRINT_TIME |
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| 96 | |
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[81d914d8] | 97 | /* Ethernet buffer descriptor */ |
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| 98 | |
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| 99 | typedef struct _greth_rxtxdesc { |
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| 100 | volatile uint32_t ctrl; /* Length and status */ |
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| 101 | uint32_t *addr; /* Buffer pointer */ |
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| 102 | } greth_rxtxdesc; |
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| 103 | |
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[050249d] | 104 | |
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[81d914d8] | 105 | /* |
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| 106 | * Per-device data |
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| 107 | */ |
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| 108 | struct greth_softc |
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| 109 | { |
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| 110 | |
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| 111 | struct arpcom arpcom; |
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[3495c57] | 112 | |
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[81d914d8] | 113 | greth_regs *regs; |
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[3495c57] | 114 | |
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[81d914d8] | 115 | int acceptBroadcast; |
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[0f700ffc] | 116 | rtems_id daemonTid; |
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[3495c57] | 117 | |
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[81d914d8] | 118 | unsigned int tx_ptr; |
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[050249d] | 119 | unsigned int tx_dptr; |
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| 120 | unsigned int tx_cnt; |
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[81d914d8] | 121 | unsigned int rx_ptr; |
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| 122 | unsigned int txbufs; |
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| 123 | unsigned int rxbufs; |
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| 124 | greth_rxtxdesc *txdesc; |
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| 125 | greth_rxtxdesc *rxdesc; |
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| 126 | struct mbuf **rxmbuf; |
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[050249d] | 127 | struct mbuf **txmbuf; |
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[81d914d8] | 128 | rtems_vector_number vector; |
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[3495c57] | 129 | |
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[0f700ffc] | 130 | /* TX descriptor interrupt generation */ |
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| 131 | int tx_int_gen; |
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| 132 | int tx_int_gen_cur; |
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| 133 | struct mbuf *next_tx_mbuf; |
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| 134 | int max_fragsize; |
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| 135 | |
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[050249d] | 136 | /*Status*/ |
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| 137 | struct phy_device_info phydev; |
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| 138 | int fd; |
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| 139 | int sp; |
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| 140 | int gb; |
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| 141 | int gbit_mac; |
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| 142 | int auto_neg; |
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[e6f327c] | 143 | struct timespec auto_neg_time; |
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[3495c57] | 144 | |
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[81d914d8] | 145 | /* |
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| 146 | * Statistics |
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| 147 | */ |
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| 148 | unsigned long rxInterrupts; |
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[3495c57] | 149 | |
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[81d914d8] | 150 | unsigned long rxPackets; |
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| 151 | unsigned long rxLengthError; |
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| 152 | unsigned long rxNonOctet; |
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| 153 | unsigned long rxBadCRC; |
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| 154 | unsigned long rxOverrun; |
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[3495c57] | 155 | |
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[81d914d8] | 156 | unsigned long txInterrupts; |
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[3495c57] | 157 | |
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[81d914d8] | 158 | unsigned long txDeferred; |
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| 159 | unsigned long txHeartbeat; |
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| 160 | unsigned long txLateCollision; |
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| 161 | unsigned long txRetryLimit; |
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| 162 | unsigned long txUnderrun; |
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[050249d] | 163 | |
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[81d914d8] | 164 | }; |
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| 165 | |
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| 166 | static struct greth_softc greth; |
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| 167 | |
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[0f700ffc] | 168 | int greth_process_tx_gbit(struct greth_softc *sc); |
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| 169 | int greth_process_tx(struct greth_softc *sc); |
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| 170 | |
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[81d914d8] | 171 | static char *almalloc(int sz) |
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| 172 | { |
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| 173 | char *tmp; |
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| 174 | tmp = calloc(1,2*sz); |
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[c48572d9] | 175 | tmp = (char *) (((uintptr_t)tmp+sz) & ~(sz -1)); |
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[81d914d8] | 176 | return(tmp); |
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| 177 | } |
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| 178 | |
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| 179 | /* GRETH interrupt handler */ |
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| 180 | |
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[e4b50853] | 181 | static void greth_interrupt_handler (void *arg) |
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[81d914d8] | 182 | { |
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[050249d] | 183 | uint32_t status; |
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[0f700ffc] | 184 | uint32_t ctrl; |
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| 185 | rtems_event_set events = 0; |
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[7499b84] | 186 | struct greth_softc *greth = arg; |
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[3495c57] | 187 | |
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[0f700ffc] | 188 | /* read and clear interrupt cause */ |
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[7499b84] | 189 | status = greth->regs->status; |
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| 190 | greth->regs->status = status; |
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| 191 | ctrl = greth->regs->ctrl; |
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[3495c57] | 192 | |
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[050249d] | 193 | /* Frame received? */ |
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[0f700ffc] | 194 | if ((ctrl & GRETH_CTRL_RXIRQ) && (status & (GRETH_STATUS_RXERR | GRETH_STATUS_RXIRQ))) |
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[050249d] | 195 | { |
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[7499b84] | 196 | greth->rxInterrupts++; |
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[0f700ffc] | 197 | /* Stop RX-Error and RX-Packet interrupts */ |
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| 198 | ctrl &= ~GRETH_CTRL_RXIRQ; |
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| 199 | events |= INTERRUPT_EVENT; |
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[050249d] | 200 | } |
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[0f700ffc] | 201 | |
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| 202 | if ( (ctrl & GRETH_CTRL_TXIRQ) && (status & (GRETH_STATUS_TXERR | GRETH_STATUS_TXIRQ)) ) |
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[050249d] | 203 | { |
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[7499b84] | 204 | greth->txInterrupts++; |
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[0f700ffc] | 205 | ctrl &= ~GRETH_CTRL_TXIRQ; |
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| 206 | events |= GRETH_TX_WAIT_EVENT; |
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[050249d] | 207 | } |
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[7499b84] | 208 | |
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[0f700ffc] | 209 | /* Clear interrupt sources */ |
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[7499b84] | 210 | greth->regs->ctrl = ctrl; |
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| 211 | |
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[0f700ffc] | 212 | /* Send the event(s) */ |
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| 213 | if ( events ) |
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[26e90fb1] | 214 | rtems_bsdnet_event_send (greth->daemonTid, events); |
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[81d914d8] | 215 | } |
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| 216 | |
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[050249d] | 217 | static uint32_t read_mii(uint32_t phy_addr, uint32_t reg_addr) |
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[81d914d8] | 218 | { |
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| 219 | while (greth.regs->mdio_ctrl & GRETH_MDIO_BUSY) {} |
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[050249d] | 220 | greth.regs->mdio_ctrl = (phy_addr << 11) | (reg_addr << 6) | GRETH_MDIO_READ; |
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[81d914d8] | 221 | while (greth.regs->mdio_ctrl & GRETH_MDIO_BUSY) {} |
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| 222 | if (!(greth.regs->mdio_ctrl & GRETH_MDIO_LINKFAIL)) |
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| 223 | return((greth.regs->mdio_ctrl >> 16) & 0xFFFF); |
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| 224 | else { |
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| 225 | printf("greth: failed to read mii\n"); |
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| 226 | return (0); |
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| 227 | } |
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| 228 | } |
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| 229 | |
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[050249d] | 230 | static void write_mii(uint32_t phy_addr, uint32_t reg_addr, uint32_t data) |
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[81d914d8] | 231 | { |
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| 232 | while (greth.regs->mdio_ctrl & GRETH_MDIO_BUSY) {} |
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[050249d] | 233 | greth.regs->mdio_ctrl = |
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| 234 | ((data & 0xFFFF) << 16) | (phy_addr << 11) | (reg_addr << 6) | GRETH_MDIO_WRITE; |
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[81d914d8] | 235 | while (greth.regs->mdio_ctrl & GRETH_MDIO_BUSY) {} |
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| 236 | } |
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[050249d] | 237 | |
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[3495c57] | 238 | static void print_init_info(struct greth_softc *sc) |
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[050249d] | 239 | { |
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| 240 | printf("greth: driver attached\n"); |
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[0f700ffc] | 241 | if ( sc->auto_neg == -1 ){ |
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| 242 | printf("Auto negotiation timed out. Selecting default config\n"); |
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| 243 | } |
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[050249d] | 244 | printf("**** PHY ****\n"); |
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| 245 | printf("Vendor: %x Device: %x Revision: %d\n",sc->phydev.vendor, sc->phydev.device, sc->phydev.rev); |
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| 246 | printf("Current Operating Mode: "); |
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| 247 | if (sc->gb) { |
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| 248 | printf("1000 Mbit "); |
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| 249 | } else if (sc->sp) { |
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| 250 | printf("100 Mbit "); |
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| 251 | } else { |
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| 252 | printf("10 Mbit "); |
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| 253 | } |
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| 254 | if (sc->fd) { |
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| 255 | printf("Full Duplex\n"); |
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| 256 | } else { |
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| 257 | printf("Half Duplex\n"); |
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| 258 | } |
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| 259 | #ifdef GRETH_AUTONEGO_PRINT_TIME |
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[e6f327c] | 260 | if ( sc->auto_neg ) { |
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[e4b50853] | 261 | printf("Autonegotiation Time: %ldms\n", sc->auto_neg_time.tv_sec*1000 + |
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[e6f327c] | 262 | sc->auto_neg_time.tv_nsec/1000000); |
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[050249d] | 263 | } |
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| 264 | #endif |
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| 265 | } |
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| 266 | |
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| 267 | |
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[81d914d8] | 268 | /* |
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| 269 | * Initialize the ethernet hardware |
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| 270 | */ |
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| 271 | static void |
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| 272 | greth_initialize_hardware (struct greth_softc *sc) |
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| 273 | { |
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| 274 | struct mbuf *m; |
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| 275 | int i; |
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[050249d] | 276 | int phyaddr; |
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| 277 | int phyctrl; |
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| 278 | int phystatus; |
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| 279 | int tmp1; |
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| 280 | int tmp2; |
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[e6f327c] | 281 | struct timespec tstart, tnow; |
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[050249d] | 282 | |
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[81d914d8] | 283 | greth_regs *regs; |
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| 284 | |
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| 285 | regs = sc->regs; |
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[3495c57] | 286 | |
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[81d914d8] | 287 | /* Reset the controller. */ |
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| 288 | greth.rxInterrupts = 0; |
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| 289 | greth.rxPackets = 0; |
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| 290 | |
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| 291 | regs->ctrl = 0; |
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| 292 | regs->ctrl = GRETH_CTRL_RST; /* Reset ON */ |
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| 293 | regs->ctrl = 0; /* Reset OFF */ |
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[3495c57] | 294 | |
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[050249d] | 295 | /* Check if mac is gbit capable*/ |
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[3495c57] | 296 | sc->gbit_mac = (regs->ctrl >> 27) & 1; |
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| 297 | |
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[050249d] | 298 | /* Get the phy address which assumed to have been set |
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| 299 | correctly with the reset value in hardware*/ |
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| 300 | phyaddr = (regs->mdio_ctrl >> 11) & 0x1F; |
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| 301 | |
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| 302 | /* get phy control register default values */ |
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| 303 | while ((phyctrl = read_mii(phyaddr, 0)) & 0x8000) {} |
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[3495c57] | 304 | |
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[050249d] | 305 | /* reset PHY and wait for completion */ |
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| 306 | write_mii(phyaddr, 0, 0x8000 | phyctrl); |
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| 307 | |
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| 308 | while ((read_mii(phyaddr, 0)) & 0x8000) {} |
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[45fecbb6] | 309 | phystatus = read_mii(phyaddr, 1); |
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| 310 | |
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| 311 | /* Disable Gbit auto-neg advertisement if MAC does not support it */ |
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| 312 | |
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| 313 | if ((!sc->gbit_mac) && (phystatus & 0x100)) write_mii(phyaddr, 9, 0); |
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| 314 | |
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| 315 | /* Restart auto-negotiation if available */ |
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| 316 | if (phystatus & 0x08) { |
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| 317 | write_mii(phyaddr, 0, phyctrl | 0x1200); |
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| 318 | phyctrl = read_mii(phyaddr, 0); |
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| 319 | } |
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[3495c57] | 320 | |
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| 321 | /* Check if PHY is autoneg capable and then determine operating mode, |
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[050249d] | 322 | otherwise force it to 10 Mbit halfduplex */ |
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| 323 | sc->gb = 0; |
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| 324 | sc->fd = 0; |
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| 325 | sc->sp = 0; |
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| 326 | sc->auto_neg = 0; |
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[e6f327c] | 327 | _Timespec_Set_to_zero(&sc->auto_neg_time); |
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[050249d] | 328 | if ((phyctrl >> 12) & 1) { |
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| 329 | /*wait for auto negotiation to complete*/ |
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| 330 | sc->auto_neg = 1; |
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[e6f327c] | 331 | if (rtems_clock_get_uptime(&tstart) != RTEMS_SUCCESSFUL) |
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| 332 | printk("rtems_clock_get_uptime failed\n"); |
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[050249d] | 333 | while (!(((phystatus = read_mii(phyaddr, 1)) >> 5) & 1)) { |
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[e6f327c] | 334 | if (rtems_clock_get_uptime(&tnow) != RTEMS_SUCCESSFUL) |
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| 335 | printk("rtems_clock_get_uptime failed\n"); |
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| 336 | _Timespec_Subtract(&tstart, &tnow, &sc->auto_neg_time); |
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| 337 | if (_Timespec_Greater_than(&sc->auto_neg_time, &greth_tan)) { |
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[0f700ffc] | 338 | sc->auto_neg = -1; /* Failed */ |
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[050249d] | 339 | tmp1 = read_mii(phyaddr, 0); |
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| 340 | sc->gb = ((phyctrl >> 6) & 1) && !((phyctrl >> 13) & 1); |
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| 341 | sc->sp = !((phyctrl >> 6) & 1) && ((phyctrl >> 13) & 1); |
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| 342 | sc->fd = (phyctrl >> 8) & 1; |
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| 343 | goto auto_neg_done; |
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| 344 | } |
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[e6f327c] | 345 | /* Wait about 30ms, time is PHY dependent */ |
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| 346 | rtems_task_wake_after(rtems_clock_get_ticks_per_second()/32); |
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[050249d] | 347 | } |
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| 348 | sc->phydev.adv = read_mii(phyaddr, 4); |
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| 349 | sc->phydev.part = read_mii(phyaddr, 5); |
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| 350 | if ((phystatus >> 8) & 1) { |
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| 351 | sc->phydev.extadv = read_mii(phyaddr, 9); |
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| 352 | sc->phydev.extpart = read_mii(phyaddr, 10); |
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| 353 | if ( (sc->phydev.extadv & GRETH_MII_EXTADV_1000FD) && |
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| 354 | (sc->phydev.extpart & GRETH_MII_EXTPRT_1000FD)) { |
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| 355 | sc->gb = 1; |
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| 356 | sc->fd = 1; |
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| 357 | } |
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[1bdc6d1] | 358 | else if ( (sc->phydev.extadv & GRETH_MII_EXTADV_1000HD) && |
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[050249d] | 359 | (sc->phydev.extpart & GRETH_MII_EXTPRT_1000HD)) { |
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| 360 | sc->gb = 1; |
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| 361 | sc->fd = 0; |
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| 362 | } |
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| 363 | } |
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| 364 | if ((sc->gb == 0) || ((sc->gb == 1) && (sc->gbit_mac == 0))) { |
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| 365 | if ( (sc->phydev.adv & GRETH_MII_100TXFD) && |
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| 366 | (sc->phydev.part & GRETH_MII_100TXFD)) { |
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| 367 | sc->sp = 1; |
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| 368 | sc->fd = 1; |
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| 369 | } |
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[1bdc6d1] | 370 | else if ( (sc->phydev.adv & GRETH_MII_100TXHD) && |
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[050249d] | 371 | (sc->phydev.part & GRETH_MII_100TXHD)) { |
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| 372 | sc->sp = 1; |
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| 373 | sc->fd = 0; |
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| 374 | } |
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[1bdc6d1] | 375 | else if ( (sc->phydev.adv & GRETH_MII_10FD) && |
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[050249d] | 376 | (sc->phydev.part & GRETH_MII_10FD)) { |
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| 377 | sc->fd = 1; |
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| 378 | } |
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| 379 | } |
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| 380 | } |
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| 381 | auto_neg_done: |
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| 382 | sc->phydev.vendor = 0; |
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| 383 | sc->phydev.device = 0; |
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| 384 | sc->phydev.rev = 0; |
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| 385 | phystatus = read_mii(phyaddr, 1); |
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[3495c57] | 386 | |
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[050249d] | 387 | /*Read out PHY info if extended registers are available */ |
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[0f700ffc] | 388 | if (phystatus & 1) { |
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[050249d] | 389 | tmp1 = read_mii(phyaddr, 2); |
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| 390 | tmp2 = read_mii(phyaddr, 3); |
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| 391 | |
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| 392 | sc->phydev.vendor = (tmp1 << 6) | ((tmp2 >> 10) & 0x3F); |
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| 393 | sc->phydev.rev = tmp2 & 0xF; |
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| 394 | sc->phydev.device = (tmp2 >> 4) & 0x3F; |
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| 395 | } |
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| 396 | |
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| 397 | /* Force to 10 mbit half duplex if the 10/100 MAC is used with a 1000 PHY*/ |
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| 398 | /*check if marvell 88EE1111 PHY. Needs special reset handling */ |
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| 399 | if ((phystatus & 1) && (sc->phydev.vendor == 0x005043) && (sc->phydev.device == 0x0C)) { |
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| 400 | if (((sc->gb) && !(sc->gbit_mac)) || !((phyctrl >> 12) & 1)) { |
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| 401 | write_mii(phyaddr, 0, sc->sp << 13); |
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| 402 | write_mii(phyaddr, 0, 0x8000); |
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| 403 | sc->gb = 0; |
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| 404 | sc->sp = 0; |
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| 405 | sc->fd = 0; |
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| 406 | } |
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| 407 | } else { |
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| 408 | if (((sc->gb) && !(sc->gbit_mac)) || !((phyctrl >> 12) & 1)) { |
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| 409 | write_mii(phyaddr, 0, sc->sp << 13); |
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| 410 | sc->gb = 0; |
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| 411 | sc->sp = 0; |
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| 412 | sc->fd = 0; |
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| 413 | } |
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| 414 | } |
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| 415 | while ((read_mii(phyaddr, 0)) & 0x8000) {} |
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| 416 | |
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| 417 | regs->ctrl = 0; |
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| 418 | regs->ctrl = GRETH_CTRL_RST; /* Reset ON */ |
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| 419 | regs->ctrl = 0; |
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[81d914d8] | 420 | |
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| 421 | /* Initialize rx/tx descriptor pointers */ |
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| 422 | sc->txdesc = (greth_rxtxdesc *) almalloc(1024); |
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| 423 | sc->rxdesc = (greth_rxtxdesc *) almalloc(1024); |
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| 424 | sc->tx_ptr = 0; |
---|
[050249d] | 425 | sc->tx_dptr = 0; |
---|
| 426 | sc->tx_cnt = 0; |
---|
[81d914d8] | 427 | sc->rx_ptr = 0; |
---|
[c48572d9] | 428 | regs->txdesc = (uintptr_t) sc->txdesc; |
---|
| 429 | regs->rxdesc = (uintptr_t) sc->rxdesc; |
---|
[3495c57] | 430 | |
---|
[81d914d8] | 431 | sc->rxmbuf = calloc(sc->rxbufs, sizeof(*sc->rxmbuf)); |
---|
[050249d] | 432 | sc->txmbuf = calloc(sc->txbufs, sizeof(*sc->txmbuf)); |
---|
[81d914d8] | 433 | |
---|
| 434 | for (i = 0; i < sc->txbufs; i++) |
---|
| 435 | { |
---|
[050249d] | 436 | sc->txdesc[i].ctrl = 0; |
---|
| 437 | if (!(sc->gbit_mac)) { |
---|
| 438 | sc->txdesc[i].addr = malloc(GRETH_MAXBUF_LEN); |
---|
| 439 | } |
---|
[81d914d8] | 440 | #ifdef GRETH_DEBUG |
---|
[050249d] | 441 | /* printf("TXBUF: %08x\n", (int) sc->txdesc[i].addr); */ |
---|
[81d914d8] | 442 | #endif |
---|
| 443 | } |
---|
| 444 | for (i = 0; i < sc->rxbufs; i++) |
---|
| 445 | { |
---|
| 446 | |
---|
| 447 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
| 448 | MCLGET (m, M_WAIT); |
---|
[050249d] | 449 | if (sc->gbit_mac) |
---|
| 450 | m->m_data += 2; |
---|
[81d914d8] | 451 | m->m_pkthdr.rcvif = &sc->arpcom.ac_if; |
---|
| 452 | sc->rxmbuf[i] = m; |
---|
| 453 | sc->rxdesc[i].addr = (uint32_t *) mtod(m, uint32_t *); |
---|
| 454 | sc->rxdesc[i].ctrl = GRETH_RXD_ENABLE | GRETH_RXD_IRQ; |
---|
| 455 | #ifdef GRETH_DEBUG |
---|
[050249d] | 456 | /* printf("RXBUF: %08x\n", (int) sc->rxdesc[i].addr); */ |
---|
[81d914d8] | 457 | #endif |
---|
| 458 | } |
---|
| 459 | sc->rxdesc[sc->rxbufs - 1].ctrl |= GRETH_RXD_WRAP; |
---|
| 460 | |
---|
| 461 | /* set ethernet address. */ |
---|
[3495c57] | 462 | regs->mac_addr_msb = |
---|
[81d914d8] | 463 | sc->arpcom.ac_enaddr[0] << 8 | sc->arpcom.ac_enaddr[1]; |
---|
[c48572d9] | 464 | |
---|
| 465 | uint32_t mac_addr_lsb; |
---|
| 466 | mac_addr_lsb = sc->arpcom.ac_enaddr[2]; |
---|
| 467 | mac_addr_lsb <<= 8; |
---|
| 468 | mac_addr_lsb |= sc->arpcom.ac_enaddr[3]; |
---|
| 469 | mac_addr_lsb <<= 8; |
---|
| 470 | mac_addr_lsb |= sc->arpcom.ac_enaddr[4]; |
---|
| 471 | mac_addr_lsb <<= 8; |
---|
| 472 | mac_addr_lsb |= sc->arpcom.ac_enaddr[5]; |
---|
| 473 | regs->mac_addr_lsb = mac_addr_lsb; |
---|
[81d914d8] | 474 | |
---|
[0f700ffc] | 475 | if ( sc->rxbufs < 10 ) { |
---|
| 476 | sc->tx_int_gen = sc->tx_int_gen_cur = 1; |
---|
| 477 | }else{ |
---|
| 478 | sc->tx_int_gen = sc->tx_int_gen_cur = sc->txbufs/2; |
---|
| 479 | } |
---|
| 480 | sc->next_tx_mbuf = NULL; |
---|
| 481 | |
---|
| 482 | if ( !sc->gbit_mac ) |
---|
| 483 | sc->max_fragsize = 1; |
---|
[81d914d8] | 484 | |
---|
| 485 | /* clear all pending interrupts */ |
---|
| 486 | regs->status = 0xffffffff; |
---|
[0f700ffc] | 487 | |
---|
[7499b84] | 488 | /* install interrupt handler */ |
---|
| 489 | rtems_interrupt_handler_install(sc->vector, "greth", RTEMS_INTERRUPT_SHARED, |
---|
| 490 | greth_interrupt_handler, sc); |
---|
[81d914d8] | 491 | |
---|
[050249d] | 492 | regs->ctrl |= GRETH_CTRL_RXEN | (sc->fd << 4) | GRETH_CTRL_RXIRQ | (sc->sp << 7) | (sc->gb << 8); |
---|
[0f700ffc] | 493 | |
---|
[050249d] | 494 | print_init_info(sc); |
---|
[81d914d8] | 495 | } |
---|
| 496 | |
---|
[39671330] | 497 | #ifdef CPU_U32_FIX |
---|
| 498 | |
---|
| 499 | /* |
---|
| 500 | * Routine to align the received packet so that the ip header |
---|
| 501 | * is on a 32-bit boundary. Necessary for cpu's that do not |
---|
| 502 | * allow unaligned loads and stores and when the 32-bit DMA |
---|
| 503 | * mode is used. |
---|
| 504 | * |
---|
| 505 | * Transfers are done on word basis to avoid possibly slow byte |
---|
| 506 | * and half-word writes. |
---|
| 507 | */ |
---|
| 508 | |
---|
| 509 | void ipalign(struct mbuf *m) |
---|
| 510 | { |
---|
| 511 | unsigned int *first, *last, data; |
---|
| 512 | unsigned int tmp; |
---|
| 513 | |
---|
| 514 | if ((((int) m->m_data) & 2) && (m->m_len)) { |
---|
| 515 | last = (unsigned int *) ((((int) m->m_data) + m->m_len + 8) & ~3); |
---|
| 516 | first = (unsigned int *) (((int) m->m_data) & ~3); |
---|
| 517 | tmp = GRETH_MEM_LOAD(first); |
---|
| 518 | tmp = tmp << 16; |
---|
| 519 | first++; |
---|
| 520 | do { |
---|
| 521 | /* When snooping is not available the LDA instruction must be used |
---|
| 522 | * to avoid the cache to return an illegal value. |
---|
| 523 | * Load with forced cache miss |
---|
| 524 | */ |
---|
| 525 | data = GRETH_MEM_LOAD(first); |
---|
| 526 | *first = tmp | (data >> 16); |
---|
| 527 | tmp = data << 16; |
---|
| 528 | first++; |
---|
| 529 | } while (first <= last); |
---|
| 530 | |
---|
| 531 | m->m_data = (caddr_t)(((int) m->m_data) + 2); |
---|
| 532 | } |
---|
| 533 | } |
---|
| 534 | #endif |
---|
| 535 | |
---|
[e4b50853] | 536 | static void |
---|
[0f700ffc] | 537 | greth_Daemon (void *arg) |
---|
[81d914d8] | 538 | { |
---|
| 539 | struct ether_header *eh; |
---|
| 540 | struct greth_softc *dp = (struct greth_softc *) &greth; |
---|
| 541 | struct ifnet *ifp = &dp->arpcom.ac_if; |
---|
| 542 | struct mbuf *m; |
---|
| 543 | unsigned int len, len_status, bad; |
---|
| 544 | rtems_event_set events; |
---|
[0f700ffc] | 545 | rtems_interrupt_level level; |
---|
| 546 | int first; |
---|
[e4b50853] | 547 | #ifdef CPU_U32_FIX |
---|
[39671330] | 548 | unsigned int tmp; |
---|
[e4b50853] | 549 | #endif |
---|
[3495c57] | 550 | |
---|
[81d914d8] | 551 | for (;;) |
---|
| 552 | { |
---|
[0f700ffc] | 553 | rtems_bsdnet_event_receive (INTERRUPT_EVENT | GRETH_TX_WAIT_EVENT, |
---|
[81d914d8] | 554 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
| 555 | RTEMS_NO_TIMEOUT, &events); |
---|
[3495c57] | 556 | |
---|
[0f700ffc] | 557 | if ( events & GRETH_TX_WAIT_EVENT ){ |
---|
| 558 | /* TX interrupt. |
---|
| 559 | * We only end up here when all TX descriptors has been used, |
---|
| 560 | * and |
---|
| 561 | */ |
---|
| 562 | if ( dp->gbit_mac ) |
---|
| 563 | greth_process_tx_gbit(dp); |
---|
| 564 | else |
---|
| 565 | greth_process_tx(dp); |
---|
| 566 | |
---|
| 567 | /* If we didn't get a RX interrupt we don't process it */ |
---|
| 568 | if ( (events & INTERRUPT_EVENT) == 0 ) |
---|
| 569 | continue; |
---|
| 570 | } |
---|
| 571 | |
---|
[81d914d8] | 572 | #ifdef GRETH_ETH_DEBUG |
---|
| 573 | printf ("r\n"); |
---|
| 574 | #endif |
---|
[0f700ffc] | 575 | first=1; |
---|
| 576 | /* Scan for Received packets */ |
---|
| 577 | again: |
---|
[050249d] | 578 | while (!((len_status = |
---|
[39671330] | 579 | GRETH_MEM_LOAD(&dp->rxdesc[dp->rx_ptr].ctrl)) & GRETH_RXD_ENABLE)) |
---|
[81d914d8] | 580 | { |
---|
[050249d] | 581 | bad = 0; |
---|
| 582 | if (len_status & GRETH_RXD_TOOLONG) |
---|
| 583 | { |
---|
| 584 | dp->rxLengthError++; |
---|
| 585 | bad = 1; |
---|
| 586 | } |
---|
| 587 | if (len_status & GRETH_RXD_DRIBBLE) |
---|
| 588 | { |
---|
| 589 | dp->rxNonOctet++; |
---|
| 590 | bad = 1; |
---|
| 591 | } |
---|
| 592 | if (len_status & GRETH_RXD_CRCERR) |
---|
| 593 | { |
---|
| 594 | dp->rxBadCRC++; |
---|
| 595 | bad = 1; |
---|
| 596 | } |
---|
| 597 | if (len_status & GRETH_RXD_OVERRUN) |
---|
| 598 | { |
---|
| 599 | dp->rxOverrun++; |
---|
| 600 | bad = 1; |
---|
| 601 | } |
---|
| 602 | if (len_status & GRETH_RXD_LENERR) |
---|
| 603 | { |
---|
| 604 | dp->rxLengthError++; |
---|
| 605 | bad = 1; |
---|
| 606 | } |
---|
| 607 | if (!bad) |
---|
| 608 | { |
---|
| 609 | /* pass on the packet in the receive buffer */ |
---|
| 610 | len = len_status & 0x7FF; |
---|
| 611 | m = dp->rxmbuf[dp->rx_ptr]; |
---|
| 612 | #ifdef GRETH_DEBUG |
---|
| 613 | int i; |
---|
| 614 | printf("RX: 0x%08x, Len: %d : ", (int) m->m_data, len); |
---|
| 615 | for (i=0; i<len; i++) |
---|
| 616 | printf("%x%x", (m->m_data[i] >> 4) & 0x0ff, m->m_data[i] & 0x0ff); |
---|
| 617 | printf("\n"); |
---|
| 618 | #endif |
---|
| 619 | m->m_len = m->m_pkthdr.len = |
---|
| 620 | len - sizeof (struct ether_header); |
---|
| 621 | |
---|
| 622 | eh = mtod (m, struct ether_header *); |
---|
[39671330] | 623 | |
---|
[050249d] | 624 | m->m_data += sizeof (struct ether_header); |
---|
[81d914d8] | 625 | #ifdef CPU_U32_FIX |
---|
[39671330] | 626 | if(!dp->gbit_mac) { |
---|
| 627 | /* OVERRIDE CACHED ETHERNET HEADER FOR NON-SNOOPING SYSTEMS */ |
---|
| 628 | tmp = GRETH_MEM_LOAD((uintptr_t)eh); |
---|
| 629 | tmp = GRETH_MEM_LOAD(4+(uintptr_t)eh); |
---|
| 630 | tmp = GRETH_MEM_LOAD(8+(uintptr_t)eh); |
---|
| 631 | tmp = GRETH_MEM_LOAD(12+(uintptr_t)eh); |
---|
[e4b50853] | 632 | (void)tmp; |
---|
[050249d] | 633 | ipalign(m); /* Align packet on 32-bit boundary */ |
---|
[39671330] | 634 | } |
---|
[81d914d8] | 635 | #endif |
---|
[050249d] | 636 | |
---|
| 637 | ether_input (ifp, eh, m); |
---|
| 638 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
| 639 | MCLGET (m, M_WAIT); |
---|
| 640 | if (dp->gbit_mac) |
---|
| 641 | m->m_data += 2; |
---|
| 642 | dp->rxmbuf[dp->rx_ptr] = m; |
---|
| 643 | m->m_pkthdr.rcvif = ifp; |
---|
| 644 | dp->rxdesc[dp->rx_ptr].addr = |
---|
| 645 | (uint32_t *) mtod (m, uint32_t *); |
---|
| 646 | dp->rxPackets++; |
---|
| 647 | } |
---|
| 648 | if (dp->rx_ptr == dp->rxbufs - 1) { |
---|
| 649 | dp->rxdesc[dp->rx_ptr].ctrl = GRETH_RXD_ENABLE | GRETH_RXD_IRQ | GRETH_RXD_WRAP; |
---|
| 650 | } else { |
---|
| 651 | dp->rxdesc[dp->rx_ptr].ctrl = GRETH_RXD_ENABLE | GRETH_RXD_IRQ; |
---|
| 652 | } |
---|
[0f700ffc] | 653 | rtems_interrupt_disable(level); |
---|
[050249d] | 654 | dp->regs->ctrl |= GRETH_CTRL_RXEN; |
---|
[0f700ffc] | 655 | rtems_interrupt_enable(level); |
---|
[050249d] | 656 | dp->rx_ptr = (dp->rx_ptr + 1) % dp->rxbufs; |
---|
[81d914d8] | 657 | } |
---|
[0f700ffc] | 658 | |
---|
| 659 | /* Always scan twice to avoid deadlock */ |
---|
| 660 | if ( first ){ |
---|
| 661 | first=0; |
---|
| 662 | rtems_interrupt_disable(level); |
---|
| 663 | dp->regs->ctrl |= GRETH_CTRL_RXIRQ; |
---|
| 664 | rtems_interrupt_enable(level); |
---|
| 665 | goto again; |
---|
| 666 | } |
---|
| 667 | |
---|
[81d914d8] | 668 | } |
---|
[3495c57] | 669 | |
---|
[81d914d8] | 670 | } |
---|
| 671 | |
---|
| 672 | static int inside = 0; |
---|
[0f700ffc] | 673 | static int |
---|
[81d914d8] | 674 | sendpacket (struct ifnet *ifp, struct mbuf *m) |
---|
| 675 | { |
---|
| 676 | struct greth_softc *dp = ifp->if_softc; |
---|
| 677 | unsigned char *temp; |
---|
| 678 | struct mbuf *n; |
---|
| 679 | unsigned int len; |
---|
[0f700ffc] | 680 | rtems_interrupt_level level; |
---|
[3495c57] | 681 | |
---|
[81d914d8] | 682 | /*printf("Send packet entered\n");*/ |
---|
| 683 | if (inside) printf ("error: sendpacket re-entered!!\n"); |
---|
| 684 | inside = 1; |
---|
[0f700ffc] | 685 | |
---|
[81d914d8] | 686 | /* |
---|
[0f700ffc] | 687 | * Is there a free descriptor available? |
---|
[81d914d8] | 688 | */ |
---|
[39671330] | 689 | if (GRETH_MEM_LOAD(&dp->txdesc[dp->tx_ptr].ctrl) & GRETH_TXD_ENABLE){ |
---|
[0f700ffc] | 690 | /* No. */ |
---|
| 691 | inside = 0; |
---|
| 692 | return 1; |
---|
| 693 | } |
---|
[81d914d8] | 694 | |
---|
[0f700ffc] | 695 | /* Remember head of chain */ |
---|
| 696 | n = m; |
---|
[81d914d8] | 697 | |
---|
| 698 | len = 0; |
---|
[39671330] | 699 | temp = (unsigned char *) GRETH_MEM_LOAD(&dp->txdesc[dp->tx_ptr].addr); |
---|
[81d914d8] | 700 | #ifdef GRETH_DEBUG |
---|
[050249d] | 701 | printf("TXD: 0x%08x : BUF: 0x%08x\n", (int) m->m_data, (int) temp); |
---|
[81d914d8] | 702 | #endif |
---|
| 703 | for (;;) |
---|
[050249d] | 704 | { |
---|
[81d914d8] | 705 | #ifdef GRETH_DEBUG |
---|
[050249d] | 706 | int i; |
---|
| 707 | printf("MBUF: 0x%08x : ", (int) m->m_data); |
---|
| 708 | for (i=0;i<m->m_len;i++) |
---|
| 709 | printf("%x%x", (m->m_data[i] >> 4) & 0x0ff, m->m_data[i] & 0x0ff); |
---|
| 710 | printf("\n"); |
---|
[81d914d8] | 711 | #endif |
---|
[050249d] | 712 | len += m->m_len; |
---|
| 713 | if (len <= RBUF_SIZE) |
---|
| 714 | memcpy ((void *) temp, (char *) m->m_data, m->m_len); |
---|
| 715 | temp += m->m_len; |
---|
| 716 | if ((m = m->m_next) == NULL) |
---|
| 717 | break; |
---|
| 718 | } |
---|
[3495c57] | 719 | |
---|
[81d914d8] | 720 | m_freem (n); |
---|
[3495c57] | 721 | |
---|
[81d914d8] | 722 | /* don't send long packets */ |
---|
| 723 | |
---|
| 724 | if (len <= GRETH_MAXBUF_LEN) { |
---|
[050249d] | 725 | if (dp->tx_ptr < dp->txbufs-1) { |
---|
| 726 | dp->txdesc[dp->tx_ptr].ctrl = GRETH_TXD_ENABLE | len; |
---|
| 727 | } else { |
---|
[3495c57] | 728 | dp->txdesc[dp->tx_ptr].ctrl = |
---|
[050249d] | 729 | GRETH_TXD_WRAP | GRETH_TXD_ENABLE | len; |
---|
| 730 | } |
---|
| 731 | dp->tx_ptr = (dp->tx_ptr + 1) % dp->txbufs; |
---|
[0f700ffc] | 732 | rtems_interrupt_disable(level); |
---|
| 733 | dp->regs->ctrl = dp->regs->ctrl | GRETH_CTRL_TXEN; |
---|
| 734 | rtems_interrupt_enable(level); |
---|
| 735 | |
---|
[81d914d8] | 736 | } |
---|
| 737 | inside = 0; |
---|
[0f700ffc] | 738 | |
---|
| 739 | return 0; |
---|
[81d914d8] | 740 | } |
---|
| 741 | |
---|
[050249d] | 742 | |
---|
[e4b50853] | 743 | static int |
---|
[050249d] | 744 | sendpacket_gbit (struct ifnet *ifp, struct mbuf *m) |
---|
| 745 | { |
---|
| 746 | struct greth_softc *dp = ifp->if_softc; |
---|
| 747 | unsigned int len; |
---|
[0f700ffc] | 748 | |
---|
| 749 | unsigned int ctrl; |
---|
| 750 | int frags; |
---|
| 751 | struct mbuf *mtmp; |
---|
| 752 | int int_en; |
---|
| 753 | rtems_interrupt_level level; |
---|
[050249d] | 754 | |
---|
| 755 | if (inside) printf ("error: sendpacket re-entered!!\n"); |
---|
| 756 | inside = 1; |
---|
[3495c57] | 757 | |
---|
[050249d] | 758 | len = 0; |
---|
| 759 | #ifdef GRETH_DEBUG |
---|
| 760 | printf("TXD: 0x%08x\n", (int) m->m_data); |
---|
| 761 | #endif |
---|
[0f700ffc] | 762 | /* Get number of fragments too see if we have enough |
---|
| 763 | * resources. |
---|
| 764 | */ |
---|
| 765 | frags=1; |
---|
| 766 | mtmp=m; |
---|
| 767 | while(mtmp->m_next){ |
---|
| 768 | frags++; |
---|
| 769 | mtmp = mtmp->m_next; |
---|
| 770 | } |
---|
| 771 | |
---|
| 772 | if ( frags > dp->max_fragsize ) |
---|
| 773 | dp->max_fragsize = frags; |
---|
| 774 | |
---|
| 775 | if ( frags > dp->txbufs ){ |
---|
| 776 | inside = 0; |
---|
| 777 | printf("GRETH: MBUF-chain cannot be sent. Increase descriptor count.\n"); |
---|
| 778 | return -1; |
---|
| 779 | } |
---|
| 780 | |
---|
| 781 | if ( frags > (dp->txbufs-dp->tx_cnt) ){ |
---|
| 782 | inside = 0; |
---|
| 783 | /* Return number of fragments */ |
---|
| 784 | return frags; |
---|
| 785 | } |
---|
| 786 | |
---|
| 787 | |
---|
| 788 | /* Enable interrupt from descriptor every tx_int_gen |
---|
| 789 | * descriptor. Typically every 16 descriptor. This |
---|
| 790 | * is only to reduce the number of interrupts during |
---|
| 791 | * heavy load. |
---|
| 792 | */ |
---|
| 793 | dp->tx_int_gen_cur-=frags; |
---|
| 794 | if ( dp->tx_int_gen_cur <= 0 ){ |
---|
| 795 | dp->tx_int_gen_cur = dp->tx_int_gen; |
---|
| 796 | int_en = GRETH_TXD_IRQ; |
---|
| 797 | }else{ |
---|
| 798 | int_en = 0; |
---|
| 799 | } |
---|
| 800 | |
---|
| 801 | /* At this stage we know that enough descriptors are available */ |
---|
[050249d] | 802 | for (;;) |
---|
| 803 | { |
---|
[0f700ffc] | 804 | |
---|
[050249d] | 805 | #ifdef GRETH_DEBUG |
---|
[0f700ffc] | 806 | int i; |
---|
| 807 | printf("MBUF: 0x%08x, Len: %d : ", (int) m->m_data, m->m_len); |
---|
| 808 | for (i=0; i<m->m_len; i++) |
---|
| 809 | printf("%x%x", (m->m_data[i] >> 4) & 0x0ff, m->m_data[i] & 0x0ff); |
---|
| 810 | printf("\n"); |
---|
[050249d] | 811 | #endif |
---|
| 812 | len += m->m_len; |
---|
| 813 | dp->txdesc[dp->tx_ptr].addr = (uint32_t *)m->m_data; |
---|
[0f700ffc] | 814 | |
---|
| 815 | /* Wrap around? */ |
---|
[050249d] | 816 | if (dp->tx_ptr < dp->txbufs-1) { |
---|
[a20c114] | 817 | ctrl = GRETH_TXD_ENABLE; |
---|
[0f700ffc] | 818 | }else{ |
---|
[a20c114] | 819 | ctrl = GRETH_TXD_ENABLE | GRETH_TXD_WRAP; |
---|
[0f700ffc] | 820 | } |
---|
| 821 | |
---|
| 822 | /* Enable Descriptor */ |
---|
| 823 | if ((m->m_next) == NULL) { |
---|
| 824 | dp->txdesc[dp->tx_ptr].ctrl = ctrl | int_en | m->m_len; |
---|
| 825 | break; |
---|
| 826 | }else{ |
---|
| 827 | dp->txdesc[dp->tx_ptr].ctrl = GRETH_TXD_MORE | ctrl | int_en | m->m_len; |
---|
[050249d] | 828 | } |
---|
[0f700ffc] | 829 | |
---|
| 830 | /* Next */ |
---|
[050249d] | 831 | dp->txmbuf[dp->tx_ptr] = m; |
---|
| 832 | dp->tx_ptr = (dp->tx_ptr + 1) % dp->txbufs; |
---|
| 833 | dp->tx_cnt++; |
---|
| 834 | m = m->m_next; |
---|
[0f700ffc] | 835 | } |
---|
[050249d] | 836 | dp->txmbuf[dp->tx_ptr] = m; |
---|
[0f700ffc] | 837 | dp->tx_ptr = (dp->tx_ptr + 1) % dp->txbufs; |
---|
[050249d] | 838 | dp->tx_cnt++; |
---|
[0f700ffc] | 839 | |
---|
| 840 | /* Tell Hardware about newly enabled descriptor */ |
---|
| 841 | rtems_interrupt_disable(level); |
---|
[050249d] | 842 | dp->regs->ctrl = dp->regs->ctrl | GRETH_CTRL_TXEN; |
---|
[0f700ffc] | 843 | rtems_interrupt_enable(level); |
---|
| 844 | |
---|
[050249d] | 845 | inside = 0; |
---|
[0f700ffc] | 846 | |
---|
| 847 | return 0; |
---|
[050249d] | 848 | } |
---|
| 849 | |
---|
[0f700ffc] | 850 | int greth_process_tx_gbit(struct greth_softc *sc) |
---|
[81d914d8] | 851 | { |
---|
| 852 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 853 | struct mbuf *m; |
---|
[0f700ffc] | 854 | rtems_interrupt_level level; |
---|
| 855 | int first=1; |
---|
[3495c57] | 856 | |
---|
[0f700ffc] | 857 | /* |
---|
| 858 | * Send packets till queue is empty |
---|
| 859 | */ |
---|
| 860 | for (;;){ |
---|
| 861 | /* Reap Sent packets */ |
---|
[39671330] | 862 | while((sc->tx_cnt > 0) && !(GRETH_MEM_LOAD(&sc->txdesc[sc->tx_dptr].ctrl) & GRETH_TXD_ENABLE)) { |
---|
[0f700ffc] | 863 | m_free(sc->txmbuf[sc->tx_dptr]); |
---|
| 864 | sc->tx_dptr = (sc->tx_dptr + 1) % sc->txbufs; |
---|
| 865 | sc->tx_cnt--; |
---|
| 866 | } |
---|
| 867 | |
---|
| 868 | if ( sc->next_tx_mbuf ){ |
---|
| 869 | /* Get packet we tried but faild to transmit last time */ |
---|
| 870 | m = sc->next_tx_mbuf; |
---|
| 871 | sc->next_tx_mbuf = NULL; /* Mark packet taken */ |
---|
| 872 | }else{ |
---|
[050249d] | 873 | /* |
---|
[0f700ffc] | 874 | * Get the next mbuf chain to transmit from Stack. |
---|
[050249d] | 875 | */ |
---|
[0f700ffc] | 876 | IF_DEQUEUE (&ifp->if_snd, m); |
---|
| 877 | if (!m){ |
---|
| 878 | /* Hardware has sent all schedule packets, this |
---|
| 879 | * makes the stack enter at greth_start next time |
---|
| 880 | * a packet is to be sent. |
---|
| 881 | */ |
---|
| 882 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
| 883 | break; |
---|
| 884 | } |
---|
| 885 | } |
---|
[3495c57] | 886 | |
---|
[0f700ffc] | 887 | /* Are there free descriptors available? */ |
---|
| 888 | /* Try to send packet, if it a negative number is returned. */ |
---|
| 889 | if ( (sc->tx_cnt >= sc->txbufs) || sendpacket_gbit(ifp, m) ){ |
---|
| 890 | /* Not enough resources */ |
---|
[3495c57] | 891 | |
---|
[0f700ffc] | 892 | /* Since we have taken the mbuf out of the "send chain" |
---|
| 893 | * we must remember to use that next time we come back. |
---|
| 894 | * or else we have dropped a packet. |
---|
[050249d] | 895 | */ |
---|
[0f700ffc] | 896 | sc->next_tx_mbuf = m; |
---|
[3495c57] | 897 | |
---|
[0f700ffc] | 898 | /* Not enough resources, enable interrupt for transmissions |
---|
| 899 | * this way we will be informed when more TX-descriptors are |
---|
| 900 | * available. |
---|
| 901 | */ |
---|
| 902 | if ( first ){ |
---|
| 903 | first = 0; |
---|
| 904 | rtems_interrupt_disable(level); |
---|
| 905 | ifp->if_flags |= IFF_OACTIVE; |
---|
| 906 | sc->regs->ctrl |= GRETH_CTRL_TXIRQ; |
---|
| 907 | rtems_interrupt_enable(level); |
---|
| 908 | |
---|
| 909 | /* We must check again to be sure that we didn't |
---|
| 910 | * miss an interrupt (if a packet was sent just before |
---|
| 911 | * enabling interrupts) |
---|
| 912 | */ |
---|
| 913 | continue; |
---|
[050249d] | 914 | } |
---|
[0f700ffc] | 915 | |
---|
| 916 | return -1; |
---|
| 917 | }else{ |
---|
| 918 | /* Sent Ok, proceed to process more packets if available */ |
---|
| 919 | } |
---|
[050249d] | 920 | } |
---|
[0f700ffc] | 921 | return 0; |
---|
[050249d] | 922 | } |
---|
[81d914d8] | 923 | |
---|
[0f700ffc] | 924 | int greth_process_tx(struct greth_softc *sc) |
---|
[050249d] | 925 | { |
---|
| 926 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 927 | struct mbuf *m; |
---|
[0f700ffc] | 928 | rtems_interrupt_level level; |
---|
| 929 | int first=1; |
---|
[3495c57] | 930 | |
---|
[0f700ffc] | 931 | /* |
---|
| 932 | * Send packets till queue is empty |
---|
| 933 | */ |
---|
| 934 | for (;;){ |
---|
| 935 | if ( sc->next_tx_mbuf ){ |
---|
| 936 | /* Get packet we tried but failed to transmit last time */ |
---|
| 937 | m = sc->next_tx_mbuf; |
---|
| 938 | sc->next_tx_mbuf = NULL; /* Mark packet taken */ |
---|
| 939 | }else{ |
---|
[050249d] | 940 | /* |
---|
[0f700ffc] | 941 | * Get the next mbuf chain to transmit from Stack. |
---|
[050249d] | 942 | */ |
---|
[0f700ffc] | 943 | IF_DEQUEUE (&ifp->if_snd, m); |
---|
| 944 | if (!m){ |
---|
| 945 | /* Hardware has sent all schedule packets, this |
---|
| 946 | * makes the stack enter at greth_start next time |
---|
| 947 | * a packet is to be sent. |
---|
| 948 | */ |
---|
| 949 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
| 950 | break; |
---|
| 951 | } |
---|
| 952 | } |
---|
[3495c57] | 953 | |
---|
[0f700ffc] | 954 | /* Try to send packet, failed if it a non-zero number is returned. */ |
---|
| 955 | if ( sendpacket(ifp, m) ){ |
---|
| 956 | /* Not enough resources */ |
---|
[3495c57] | 957 | |
---|
[0f700ffc] | 958 | /* Since we have taken the mbuf out of the "send chain" |
---|
| 959 | * we must remember to use that next time we come back. |
---|
| 960 | * or else we have dropped a packet. |
---|
[050249d] | 961 | */ |
---|
[0f700ffc] | 962 | sc->next_tx_mbuf = m; |
---|
| 963 | |
---|
| 964 | /* Not enough resources, enable interrupt for transmissions |
---|
| 965 | * this way we will be informed when more TX-descriptors are |
---|
| 966 | * available. |
---|
| 967 | */ |
---|
| 968 | if ( first ){ |
---|
| 969 | first = 0; |
---|
| 970 | rtems_interrupt_disable(level); |
---|
| 971 | ifp->if_flags |= IFF_OACTIVE; |
---|
| 972 | sc->regs->ctrl |= GRETH_CTRL_TXIRQ; |
---|
| 973 | rtems_interrupt_enable(level); |
---|
| 974 | |
---|
| 975 | /* We must check again to be sure that we didn't |
---|
| 976 | * miss an interrupt (if a packet was sent just before |
---|
| 977 | * enabling interrupts) |
---|
| 978 | */ |
---|
| 979 | continue; |
---|
[050249d] | 980 | } |
---|
[0f700ffc] | 981 | |
---|
| 982 | return -1; |
---|
| 983 | }else{ |
---|
| 984 | /* Sent Ok, proceed to process more packets if available */ |
---|
| 985 | } |
---|
[050249d] | 986 | } |
---|
[0f700ffc] | 987 | return 0; |
---|
[81d914d8] | 988 | } |
---|
| 989 | |
---|
| 990 | static void |
---|
| 991 | greth_start (struct ifnet *ifp) |
---|
| 992 | { |
---|
| 993 | struct greth_softc *sc = ifp->if_softc; |
---|
[3495c57] | 994 | |
---|
[0f700ffc] | 995 | if ( ifp->if_flags & IFF_OACTIVE ) |
---|
| 996 | return; |
---|
| 997 | |
---|
| 998 | if ( sc->gbit_mac ){ |
---|
| 999 | /* No use trying to handle this if we are waiting on GRETH |
---|
| 1000 | * to send the previously scheduled packets. |
---|
| 1001 | */ |
---|
[3495c57] | 1002 | |
---|
[0f700ffc] | 1003 | greth_process_tx_gbit(sc); |
---|
| 1004 | }else{ |
---|
| 1005 | greth_process_tx(sc); |
---|
| 1006 | } |
---|
[81d914d8] | 1007 | } |
---|
| 1008 | |
---|
| 1009 | /* |
---|
| 1010 | * Initialize and start the device |
---|
| 1011 | */ |
---|
| 1012 | static void |
---|
| 1013 | greth_init (void *arg) |
---|
| 1014 | { |
---|
| 1015 | struct greth_softc *sc = arg; |
---|
| 1016 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 1017 | |
---|
[0f700ffc] | 1018 | if (sc->daemonTid == 0) { |
---|
[81d914d8] | 1019 | |
---|
[0f700ffc] | 1020 | /* |
---|
| 1021 | * Start driver tasks |
---|
| 1022 | */ |
---|
| 1023 | sc->daemonTid = rtems_bsdnet_newproc ("DCrxtx", 4096, |
---|
| 1024 | greth_Daemon, sc); |
---|
[3495c57] | 1025 | |
---|
[0f700ffc] | 1026 | /* |
---|
| 1027 | * Set up GRETH hardware |
---|
| 1028 | */ |
---|
| 1029 | greth_initialize_hardware (sc); |
---|
| 1030 | |
---|
| 1031 | } |
---|
[81d914d8] | 1032 | |
---|
| 1033 | /* |
---|
| 1034 | * Tell the world that we're running. |
---|
| 1035 | */ |
---|
| 1036 | ifp->if_flags |= IFF_RUNNING; |
---|
| 1037 | } |
---|
| 1038 | |
---|
| 1039 | /* |
---|
| 1040 | * Stop the device |
---|
| 1041 | */ |
---|
| 1042 | static void |
---|
| 1043 | greth_stop (struct greth_softc *sc) |
---|
| 1044 | { |
---|
| 1045 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 1046 | |
---|
| 1047 | ifp->if_flags &= ~IFF_RUNNING; |
---|
| 1048 | |
---|
| 1049 | sc->regs->ctrl = 0; /* RX/TX OFF */ |
---|
| 1050 | sc->regs->ctrl = GRETH_CTRL_RST; /* Reset ON */ |
---|
| 1051 | sc->regs->ctrl = 0; /* Reset OFF */ |
---|
[0f700ffc] | 1052 | |
---|
| 1053 | sc->next_tx_mbuf = NULL; |
---|
[81d914d8] | 1054 | } |
---|
| 1055 | |
---|
| 1056 | |
---|
| 1057 | /* |
---|
| 1058 | * Show interface statistics |
---|
| 1059 | */ |
---|
| 1060 | static void |
---|
| 1061 | greth_stats (struct greth_softc *sc) |
---|
| 1062 | { |
---|
| 1063 | printf (" Rx Interrupts:%-8lu", sc->rxInterrupts); |
---|
| 1064 | printf (" Rx Packets:%-8lu", sc->rxPackets); |
---|
| 1065 | printf (" Length:%-8lu", sc->rxLengthError); |
---|
| 1066 | printf (" Non-octet:%-8lu\n", sc->rxNonOctet); |
---|
| 1067 | printf (" Bad CRC:%-8lu", sc->rxBadCRC); |
---|
| 1068 | printf (" Overrun:%-8lu", sc->rxOverrun); |
---|
| 1069 | printf (" Tx Interrupts:%-8lu", sc->txInterrupts); |
---|
[0f700ffc] | 1070 | printf (" Maximal Frags:%-8d", sc->max_fragsize); |
---|
| 1071 | printf (" GBIT MAC:%-8d", sc->gbit_mac); |
---|
[81d914d8] | 1072 | } |
---|
| 1073 | |
---|
| 1074 | /* |
---|
| 1075 | * Driver ioctl handler |
---|
| 1076 | */ |
---|
| 1077 | static int |
---|
[a612b50] | 1078 | greth_ioctl (struct ifnet *ifp, ioctl_command_t command, caddr_t data) |
---|
[81d914d8] | 1079 | { |
---|
| 1080 | struct greth_softc *sc = ifp->if_softc; |
---|
| 1081 | int error = 0; |
---|
| 1082 | |
---|
| 1083 | switch (command) |
---|
| 1084 | { |
---|
| 1085 | case SIOCGIFADDR: |
---|
| 1086 | case SIOCSIFADDR: |
---|
| 1087 | ether_ioctl (ifp, command, data); |
---|
| 1088 | break; |
---|
| 1089 | |
---|
| 1090 | case SIOCSIFFLAGS: |
---|
| 1091 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) |
---|
| 1092 | { |
---|
| 1093 | case IFF_RUNNING: |
---|
| 1094 | greth_stop (sc); |
---|
| 1095 | break; |
---|
| 1096 | |
---|
| 1097 | case IFF_UP: |
---|
| 1098 | greth_init (sc); |
---|
| 1099 | break; |
---|
| 1100 | |
---|
| 1101 | case IFF_UP | IFF_RUNNING: |
---|
| 1102 | greth_stop (sc); |
---|
| 1103 | greth_init (sc); |
---|
| 1104 | break; |
---|
| 1105 | default: |
---|
| 1106 | break; |
---|
| 1107 | } |
---|
| 1108 | break; |
---|
| 1109 | |
---|
| 1110 | case SIO_RTEMS_SHOW_STATS: |
---|
| 1111 | greth_stats (sc); |
---|
| 1112 | break; |
---|
| 1113 | |
---|
| 1114 | /* |
---|
| 1115 | * FIXME: All sorts of multicast commands need to be added here! |
---|
| 1116 | */ |
---|
| 1117 | default: |
---|
| 1118 | error = EINVAL; |
---|
| 1119 | break; |
---|
| 1120 | } |
---|
| 1121 | |
---|
| 1122 | return error; |
---|
| 1123 | } |
---|
| 1124 | |
---|
| 1125 | /* |
---|
| 1126 | * Attach an GRETH driver to the system |
---|
| 1127 | */ |
---|
| 1128 | int |
---|
| 1129 | rtems_greth_driver_attach (struct rtems_bsdnet_ifconfig *config, |
---|
| 1130 | greth_configuration_t *chip) |
---|
| 1131 | { |
---|
| 1132 | struct greth_softc *sc; |
---|
| 1133 | struct ifnet *ifp; |
---|
| 1134 | int mtu; |
---|
| 1135 | int unitNumber; |
---|
| 1136 | char *unitName; |
---|
| 1137 | |
---|
| 1138 | /* parse driver name */ |
---|
| 1139 | if ((unitNumber = rtems_bsdnet_parse_driver_name (config, &unitName)) < 0) |
---|
| 1140 | return 0; |
---|
| 1141 | |
---|
| 1142 | sc = &greth; |
---|
| 1143 | ifp = &sc->arpcom.ac_if; |
---|
| 1144 | memset (sc, 0, sizeof (*sc)); |
---|
| 1145 | |
---|
| 1146 | if (config->hardware_address) |
---|
| 1147 | { |
---|
| 1148 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, |
---|
| 1149 | ETHER_ADDR_LEN); |
---|
| 1150 | } |
---|
| 1151 | else |
---|
| 1152 | { |
---|
| 1153 | memset (sc->arpcom.ac_enaddr, 0x08, ETHER_ADDR_LEN); |
---|
| 1154 | } |
---|
| 1155 | |
---|
| 1156 | if (config->mtu) |
---|
| 1157 | mtu = config->mtu; |
---|
| 1158 | else |
---|
| 1159 | mtu = ETHERMTU; |
---|
| 1160 | |
---|
| 1161 | sc->acceptBroadcast = !config->ignore_broadcast; |
---|
[1f25c77] | 1162 | sc->regs = chip->base_address; |
---|
[81d914d8] | 1163 | sc->vector = chip->vector; |
---|
| 1164 | sc->txbufs = chip->txd_count; |
---|
| 1165 | sc->rxbufs = chip->rxd_count; |
---|
[3495c57] | 1166 | |
---|
[81d914d8] | 1167 | /* |
---|
| 1168 | * Set up network interface values |
---|
| 1169 | */ |
---|
| 1170 | ifp->if_softc = sc; |
---|
| 1171 | ifp->if_unit = unitNumber; |
---|
| 1172 | ifp->if_name = unitName; |
---|
| 1173 | ifp->if_mtu = mtu; |
---|
| 1174 | ifp->if_init = greth_init; |
---|
| 1175 | ifp->if_ioctl = greth_ioctl; |
---|
| 1176 | ifp->if_start = greth_start; |
---|
| 1177 | ifp->if_output = ether_output; |
---|
| 1178 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
| 1179 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
| 1180 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
| 1181 | |
---|
| 1182 | /* |
---|
| 1183 | * Attach the interface |
---|
| 1184 | */ |
---|
| 1185 | if_attach (ifp); |
---|
| 1186 | ether_ifattach (ifp); |
---|
| 1187 | |
---|
| 1188 | #ifdef GRETH_DEBUG |
---|
| 1189 | printf ("GRETH : driver has been attached\n"); |
---|
| 1190 | #endif |
---|
| 1191 | return 1; |
---|
| 1192 | }; |
---|
| 1193 | |
---|
[39671330] | 1194 | #endif |
---|