Ignore:
Timestamp:
Jul 15, 2015, 6:14:15 PM (9 years ago)
Author:
bellefin
Message:

NIC driver: update the channel registers of the NIC component (add the status variable and change the descriptor structure)

Location:
soft/giet_vm/giet_drivers
Files:
2 edited

Legend:

Unmodified
Added
Removed

  • soft/giet_vm/giet_drivers/nic_driver.c

    r481 r613  
    126126    unsigned int extend   = (X_IO << Y_WIDTH) + Y_IO;
    127127
     128    unsigned int buf_0_addr;
     129    unsigned int buf_1_addr;
     130    unsigned int sts_0_addr;
     131    unsigned int sts_1_addr;
     132
     133    unsigned int desc_lo_0;
     134    unsigned int desc_lo_1;
     135    unsigned int desc_hi_0;
     136    unsigned int desc_hi_1;
     137
    128138    if ( is_rx )
    129139    {
    130         _nic_set_channel_register( channel, NIC_RX_DESC_LO_0, base          );
    131         _nic_set_channel_register( channel, NIC_RX_DESC_LO_1, base + 0x1000 );
    132         _nic_set_channel_register( channel, NIC_RX_DESC_HI_0, extend        );
    133         _nic_set_channel_register( channel, NIC_RX_DESC_HI_1, extend        );
     140        buf_0_addr = base;
     141        buf_1_addr = base + 0x1000;
     142        sts_0_addr = base + 0x4000;
     143        sts_1_addr = base + 0x4040;
     144
     145        desc_lo_0 = (sts_0_addr >> 6) + ((buf_0_addr & 0xFC0) << 20);
     146        desc_lo_1 = (sts_1_addr >> 6) + ((buf_1_addr & 0xFC0) << 20);
     147        desc_hi_0 = ((buf_0_addr & 0xFFFFF000) >> 12) + ((extend & 0xFFF) << 20);
     148        desc_hi_1 = ((buf_1_addr & 0xFFFFF000) >> 12) + ((extend & 0xFFF) << 20);
     149
     150        _nic_set_channel_register( channel, NIC_RX_DESC_LO_0, desc_lo_0     );
     151        _nic_set_channel_register( channel, NIC_RX_DESC_LO_1, desc_lo_1     );
     152        _nic_set_channel_register( channel, NIC_RX_DESC_HI_0, desc_hi_0     );
     153        _nic_set_channel_register( channel, NIC_RX_DESC_HI_1, desc_hi_1     );
    134154        _nic_set_channel_register( channel, NIC_RX_RUN      , 1             );
    135155    }
    136156    else
    137157    {
    138         _nic_set_channel_register( channel, NIC_TX_DESC_LO_0, base + 0x2000 );
    139         _nic_set_channel_register( channel, NIC_TX_DESC_LO_1, base + 0x3000 );
    140         _nic_set_channel_register( channel, NIC_TX_DESC_HI_0, extend        );
    141         _nic_set_channel_register( channel, NIC_TX_DESC_HI_1, extend        );
     158        buf_0_addr = base + 0x2000;
     159        buf_1_addr = base + 0x3000;
     160        sts_0_addr = base + 0x4080;
     161        sts_1_addr = base + 0x40c0;
     162
     163        desc_lo_0 = (sts_0_addr >> 6) + ((buf_0_addr & 0xFC0) << 20);
     164        desc_lo_1 = (sts_1_addr >> 6) + ((buf_1_addr & 0xFC0) << 20);
     165        desc_hi_0 = ((buf_0_addr & 0xFFFFF000) >> 12) + ((extend & 0xFFF) << 20);
     166        desc_hi_1 = ((buf_1_addr & 0xFFFFF000) >> 12) + ((extend & 0xFFF) << 20);
     167
     168        _nic_set_channel_register( channel, NIC_TX_DESC_LO_0, desc_lo_0     );
     169        _nic_set_channel_register( channel, NIC_TX_DESC_LO_1, desc_lo_1     );
     170        _nic_set_channel_register( channel, NIC_TX_DESC_HI_0, desc_hi_0     );
     171        _nic_set_channel_register( channel, NIC_TX_DESC_HI_1, desc_hi_1     );
    142172        _nic_set_channel_register( channel, NIC_TX_RUN      , 1             );
    143173    }

  • soft/giet_vm/giet_drivers/nic_driver.h

    r481 r613  
    7878//////////////////////////////////////////////////////////////////////////////////////////////
    7979//            Channel Addressable Registers
    80 // A buffer descriptor occupies 64 bytes, but only 8 bytes (two 32 bits words) are useful:
    81 // LOW WORD   contains the 32 LSB bits of the buffer paddr               
    82 // HIGH WORD  contains the 16 MSB bits of the buffer paddr, plus status (bit 31)
    83 //////////////////////////////////////////////////////////////////////////////////////////////
     80// A buffer descriptor occupies 8 bytes (two 32 bits words):
     81// - the 26 LSB bits of LOW WORD contain bits[31:6] of the buffer satus paddr
     82// - bits[31:26] of LOW WORD and bits[19:0] of HIGH WORD contain bits[31:6] of the buffer paddr
     83// - the 12 MSB bits of HIGH WORD contain the common address extension of the buffer and its status
     84// The buffer status occupies 64 bytes but only the last bit is useful (1 for full and 0 for empty)
     85// The buffer address and its status address must be 64 bytes aligned (bits[5:0] equal to 0)
     86///////////////////////////////////////////////////////////////////////////////////////////////
    8487
    8588enum SoclibMultiNicChannelRegisters
    8689{
    87     NIC_RX_DESC_LO_0          = 0,   // RX_0 descriptor low word         (Read/Write)
    88     NIC_RX_DESC_HI_0          = 1,   // RX_0 descriptor high word        (Read/Write)
    89     NIC_RX_DESC_LO_1          = 16,  // RX_1 descriptor low word         (Read/Write)
    90     NIC_RX_DESC_HI_1          = 17,  // RX_1 descriptor high word        (Read/Write)
    91     NIC_TX_DESC_LO_0          = 32,  // TX_0 descriptor low word         (Read/Write)
    92     NIC_TX_DESC_HI_0          = 33,  // TX_0 descriptor high word        (Read/Write)
    93     NIC_TX_DESC_LO_1          = 48,  // TX_1 descriptor low word         (Read/Write)
    94     NIC_TX_DESC_HI_1          = 49,  // TX_1 descriptor high word        (Read/Write)
    95     NIC_MAC_4                 = 64,  // channel mac address 32 LSB bits  (Read Only)
    96     NIC_MAC_2                 = 65,  // channel mac address 16 LSB bits  (Read Only)
    97     NIC_RX_RUN                = 66,  // RX packets can be received       (write_only)
    98     NIC_TX_RUN                = 67,  // TX packets can be transmitted    (write_only)
     90    NIC_RX_STS_0              = 0,   // RX_0 status (full or empty)      (Read/Write)
     91    NIC_RX_STS_1              = 16,  // RX_1 status (full or empty)      (Read/Write)
     92    NIC_TX_STS_0              = 32,  // TX_0 status (full or empty)      (Read/Write)
     93    NIC_TX_STS_1              = 48,  // TX_1 status (full or empty)      (Read/Write)
     94    NIC_RX_DESC_LO_0          = 64,  // RX_0 descriptor low word         (Read/Write)
     95    NIC_RX_DESC_HI_0          = 65,  // RX_0 descriptor high word        (Read/Write)
     96    NIC_RX_DESC_LO_1          = 66,  // RX_1 descriptor low word         (Read/Write)
     97    NIC_RX_DESC_HI_1          = 67,  // RX_1 descriptor high word        (Read/Write)
     98    NIC_TX_DESC_LO_0          = 68,  // TX_0 descriptor low word         (Read/Write)
     99    NIC_TX_DESC_HI_0          = 69,  // TX_0 descriptor high word        (Read/Write)
     100    NIC_TX_DESC_LO_1          = 70,  // TX_1 descriptor low word         (Read/Write)
     101    NIC_TX_DESC_HI_1          = 71,  // TX_1 descriptor high word        (Read/Write)
     102    NIC_MAC_4                 = 72,  // channel mac address 32 LSB bits  (Read Only)
     103    NIC_MAC_2                 = 73,  // channel mac address 16 LSB bits  (Read Only)
     104    NIC_RX_RUN                = 74,  // RX packets can be received       (write_only)
     105    NIC_TX_RUN                = 75,  // TX packets can be transmitted    (write_only)
    99106};
    100107
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