diff options
Diffstat (limited to 'drivers/net/ethernet/sgi/meth.h')
| -rw-r--r-- | drivers/net/ethernet/sgi/meth.h | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sgi/meth.h b/drivers/net/ethernet/sgi/meth.h new file mode 100644 index 000000000..5b145c6ba --- /dev/null +++ b/drivers/net/ethernet/sgi/meth.h @@ -0,0 +1,243 @@ + +/* + * snull.h -- definitions for the network module + * + * Copyright (C) 2001 Alessandro Rubini and Jonathan Corbet + * Copyright (C) 2001 O'Reilly & Associates + * + * The source code in this file can be freely used, adapted, + * and redistributed in source or binary form, so long as an + * acknowledgment appears in derived source files. The citation + * should list that the code comes from the book "Linux Device + * Drivers" by Alessandro Rubini and Jonathan Corbet, published + * by O'Reilly & Associates. No warranty is attached; + * we cannot take responsibility for errors or fitness for use. + */ + +/* version dependencies have been confined to a separate file */ + +/* Tunable parameters */ +#define TX_RING_ENTRIES 64 /* 64-512?*/ + +#define RX_RING_ENTRIES 16 /* Do not change */ +/* Internal constants */ +#define TX_RING_BUFFER_SIZE (TX_RING_ENTRIES*sizeof(tx_packet)) +#define RX_BUFFER_SIZE 1546 /* ethenet packet size */ +#define METH_RX_BUFF_SIZE 4096 +#define METH_RX_HEAD 34 /* status + 3 quad garbage-fill + 2 byte zero-pad */ +#define RX_BUFFER_OFFSET (sizeof(rx_status_vector)+2) /* staus vector + 2 bytes of padding */ +#define RX_BUCKET_SIZE 256 + +/* For more detailed explanations of what each field menas, + see Nick's great comments to #defines below (or docs, if + you are lucky enough toget hold of them :)*/ + +/* tx status vector is written over tx command header upon + dma completion. */ + +typedef struct tx_status_vector { + u64 sent:1; /* always set to 1...*/ + u64 pad0:34;/* always set to 0 */ + u64 flags:9; /*I'm too lazy to specify each one separately at the moment*/ + u64 col_retry_cnt:4; /*collision retry count*/ + u64 len:16; /*Transmit length in bytes*/ +} tx_status_vector; + +/* + * Each packet is 128 bytes long. + * It consists of header, 0-3 concatination + * buffer pointers and up to 120 data bytes. + */ +typedef struct tx_packet_hdr { + u64 pad1:36; /*should be filled with 0 */ + u64 cat_ptr3_valid:1, /*Concatination pointer valid flags*/ + cat_ptr2_valid:1, + cat_ptr1_valid:1; + u64 tx_int_flag:1; /*Generate TX intrrupt when packet has been sent*/ + u64 term_dma_flag:1; /*Terminate transmit DMA on transmit abort conditions*/ + u64 data_offset:7; /*Starting byte offset in ring data block*/ + u64 data_len:16; /*Length of valid data in bytes-1*/ +} tx_packet_hdr; +typedef union tx_cat_ptr { + struct { + u64 pad2:16; /* should be 0 */ + u64 len:16; /*length of buffer data - 1*/ + u64 start_addr:29; /*Physical starting address*/ + u64 pad1:3; /* should be zero */ + } form; + u64 raw; +} tx_cat_ptr; + +typedef struct tx_packet { + union { + tx_packet_hdr header; + tx_status_vector res; + u64 raw; + }header; + union { + tx_cat_ptr cat_buf[3]; + char dt[120]; + } data; +} tx_packet; + +typedef union rx_status_vector { + volatile struct { + u64 pad1:1;/*fill it with ones*/ + u64 pad2:15;/*fill with 0*/ + u64 ip_chk_sum:16; + u64 seq_num:5; + u64 mac_addr_match:1; + u64 mcast_addr_match:1; + u64 carrier_event_seen:1; + u64 bad_packet:1; + u64 long_event_seen:1; + u64 invalid_preamble:1; + u64 broadcast:1; + u64 multicast:1; + u64 crc_error:1; + u64 huh:1;/*???*/ + u64 rx_code_violation:1; + u64 rx_len:16; + } parsed; + volatile u64 raw; +} rx_status_vector; + +typedef struct rx_packet { + rx_status_vector status; + u64 pad[3]; /* For whatever reason, there needs to be 4 double-word offset */ + u16 pad2; + char buf[METH_RX_BUFF_SIZE-sizeof(rx_status_vector)-3*sizeof(u64)-sizeof(u16)];/* data */ +} rx_packet; + +#define TX_INFO_RPTR 0x00FF0000 +#define TX_INFO_WPTR 0x000000FF + + /* Bits in METH_MAC */ + +#define SGI_MAC_RESET BIT(0) /* 0: MAC110 active in run mode, 1: Global reset signal to MAC110 core is active */ +#define METH_PHY_FDX BIT(1) /* 0: Disable full duplex, 1: Enable full duplex */ +#define METH_PHY_LOOP BIT(2) /* 0: Normal operation, follows 10/100mbit and M10T/MII select, 1: loops internal MII bus */ + /* selects ignored */ +#define METH_100MBIT BIT(3) /* 0: 10meg mode, 1: 100meg mode */ +#define METH_PHY_MII BIT(4) /* 0: MII selected, 1: SIA selected */ + /* Note: when loopback is set this bit becomes collision control. Setting this bit will */ + /* cause a collision to be reported. */ + + /* Bits 5 and 6 are used to determine the Destination address filter mode */ +#define METH_ACCEPT_MY 0 /* 00: Accept PHY address only */ +#define METH_ACCEPT_MCAST 0x20 /* 01: Accept physical, broadcast, and multicast filter matches only */ +#define METH_ACCEPT_AMCAST 0x40 /* 10: Accept physical, broadcast, and all multicast packets */ +#define METH_PROMISC 0x60 /* 11: Promiscious mode */ + +#define METH_PHY_LINK_FAIL BIT(7) /* 0: Link failure detection disabled, 1: Hardware scans for link failure in PHY */ + +#define METH_MAC_IPG 0x1ffff00 + +#define METH_DEFAULT_IPG ((17<<15) | (11<<22) | (21<<8)) + /* 0x172e5c00 */ /* 23, 23, 23 */ /*0x54A9500 *//*21,21,21*/ + /* Bits 8 through 14 are used to determine Inter-Packet Gap between "Back to Back" packets */ + /* The gap depends on the clock speed of the link, 80ns per increment for 100baseT, 800ns */ + /* per increment for 10BaseT */ + + /* Bits 15 through 21 are used to determine IPGR1 */ + + /* Bits 22 through 28 are used to determine IPGR2 */ + +#define METH_REV_SHIFT 29 /* Bits 29 through 31 are used to determine the revision */ + /* 000: Initial revision */ + /* 001: First revision, Improved TX concatenation */ + + +/* DMA control bits */ +#define METH_RX_OFFSET_SHIFT 12 /* Bits 12:14 of DMA control register indicate starting offset of packet data for RX operation */ +#define METH_RX_DEPTH_SHIFT 4 /* Bits 8:4 define RX fifo depth -- when # of RX fifo entries != depth, interrupt is generted */ + +#define METH_DMA_TX_EN BIT(1) /* enable TX DMA */ +#define METH_DMA_TX_INT_EN BIT(0) /* enable TX Buffer Empty interrupt */ +#define METH_DMA_RX_EN BIT(15) /* Enable RX */ +#define METH_DMA_RX_INT_EN BIT(9) /* Enable interrupt on RX packet */ + +/* RX FIFO MCL Info bits */ +#define METH_RX_FIFO_WPTR(x) (((x)>>16)&0xf) +#define METH_RX_FIFO_RPTR(x) (((x)>>8)&0xf) +#define METH_RX_FIFO_DEPTH(x) ((x)&0x1f) + +/* RX status bits */ + +#define METH_RX_ST_VALID BIT(63) +#define METH_RX_ST_RCV_CODE_VIOLATION BIT(16) +#define METH_RX_ST_DRBL_NBL BIT(17) +#define METH_RX_ST_CRC_ERR BIT(18) +#define METH_RX_ST_MCAST_PKT BIT(19) +#define METH_RX_ST_BCAST_PKT BIT(20) +#define METH_RX_ST_INV_PREAMBLE_CTX BIT(21) +#define METH_RX_ST_LONG_EVT_SEEN BIT(22) +#define METH_RX_ST_BAD_PACKET BIT(23) +#define METH_RX_ST_CARRIER_EVT_SEEN BIT(24) +#define METH_RX_ST_MCAST_FILTER_MATCH BIT(25) +#define METH_RX_ST_PHYS_ADDR_MATCH BIT(26) + +#define METH_RX_STATUS_ERRORS \ + ( \ + METH_RX_ST_RCV_CODE_VIOLATION| \ + METH_RX_ST_CRC_ERR| \ + METH_RX_ST_INV_PREAMBLE_CTX| \ + METH_RX_ST_LONG_EVT_SEEN| \ + METH_RX_ST_BAD_PACKET| \ + METH_RX_ST_CARRIER_EVT_SEEN \ + ) + /* Bits in METH_INT */ + /* Write _1_ to corresponding bit to clear */ +#define METH_INT_TX_EMPTY BIT(0) /* 0: No interrupt pending, 1: The TX ring buffer is empty */ +#define METH_INT_TX_PKT BIT(1) /* 0: No interrupt pending */ + /* 1: A TX message had the INT request bit set, the packet has been sent. */ +#define METH_INT_TX_LINK_FAIL BIT(2) /* 0: No interrupt pending, 1: PHY has reported a link failure */ +#define METH_INT_MEM_ERROR BIT(3) /* 0: No interrupt pending */ + /* 1: A memory error occurred during DMA, DMA stopped, Fatal */ +#define METH_INT_TX_ABORT BIT(4) /* 0: No interrupt pending, 1: The TX aborted operation, DMA stopped, FATAL */ +#define METH_INT_RX_THRESHOLD BIT(5) /* 0: No interrupt pending, 1: Selected receive threshold condition Valid */ +#define METH_INT_RX_UNDERFLOW BIT(6) /* 0: No interrupt pending, 1: FIFO was empty, packet could not be queued */ +#define METH_INT_RX_OVERFLOW BIT(7) /* 0: No interrupt pending, 1: DMA FIFO Overflow, DMA stopped, FATAL */ + +/*#define METH_INT_RX_RPTR_MASK 0x0001F00*/ /* Bits 8 through 12 alias of RX read-pointer */ +#define METH_INT_RX_RPTR_MASK 0x0000F00 /* Bits 8 through 11 alias of RX read-pointer - so, is Rx FIFO 16 or 32 entry?*/ + + /* Bits 13 through 15 are always 0. */ + +#define METH_INT_TX_RPTR_MASK 0x1FF0000 /* Bits 16 through 24 alias of TX read-pointer */ + +#define METH_INT_RX_SEQ_MASK 0x2E000000 /* Bits 25 through 29 are the starting seq number for the message at the */ + + /* top of the queue */ + +#define METH_INT_ERROR (METH_INT_TX_LINK_FAIL| \ + METH_INT_MEM_ERROR| \ + METH_INT_TX_ABORT| \ + METH_INT_RX_OVERFLOW| \ + METH_INT_RX_UNDERFLOW) + +#define METH_INT_MCAST_HASH BIT(30) /* If RX DMA is enabled the hash select logic output is latched here */ + +/* TX status bits */ +#define METH_TX_ST_DONE BIT(63) /* TX complete */ +#define METH_TX_ST_SUCCESS BIT(23) /* Packet was transmitted successfully */ +#define METH_TX_ST_TOOLONG BIT(24) /* TX abort due to excessive length */ +#define METH_TX_ST_UNDERRUN BIT(25) /* TX abort due to underrun (?) */ +#define METH_TX_ST_EXCCOLL BIT(26) /* TX abort due to excess collisions */ +#define METH_TX_ST_DEFER BIT(27) /* TX abort due to excess deferals */ +#define METH_TX_ST_LATECOLL BIT(28) /* TX abort due to late collision */ + + +/* Tx command header bits */ +#define METH_TX_CMD_INT_EN BIT(24) /* Generate TX interrupt when packet is sent */ + +/* Phy MDIO interface busy flag */ +#define MDIO_BUSY BIT(16) +#define MDIO_DATA_MASK 0xFFFF +/* PHY defines */ +#define PHY_QS6612X 0x0181441 /* Quality TX */ +#define PHY_ICS1889 0x0015F41 /* ICS FX */ +#define PHY_ICS1890 0x0015F42 /* ICS TX */ +#define PHY_DP83840 0x20005C0 /* National TX */ + +#define ADVANCE_RX_PTR(x) x=(x+1)&(RX_RING_ENTRIES-1) |