xdma-dma-sg/dma_wr_desc.sh at main · zeroherolin/xdma-dma-sg · GitHub

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. ./dma_param.sh

#--------------------- Configure DMA-SG descriptors ---------------------#
echo "Writing descriptors..."

write_descriptor() {
    local desc_base=$1
    local next_desc=$2
    local buffer_addr=$3
    local buffer_size=$4
    local mask=$5

    reg_write $((desc_base + 0x00)) $((next_desc + XDMA_BIAS))
    reg_write $((desc_base + 0x08)) $buffer_addr
    reg_write $((desc_base + 0x18)) $((buffer_size | mask))
    reg_write $((desc_base + 0x1C)) $((0))
}

# Descriptor 0: H2C transfer to Buffer0 (S2MM)
write_descriptor $DMA_DESC0 $DMA_DESC1 $BUFFER_ADDR0 $BUFFER_SIZE $SOF_MASK

# Descriptor 1: H2C transfer to Buffer1 (S2MM)
write_descriptor $DMA_DESC1 $DMA_DESC0 $BUFFER_ADDR1 $BUFFER_SIZE $EOF_MASK

# Descriptor 2: C2H read from Buffer0 (MM2S)
write_descriptor $DMA_DESC2 $DMA_DESC3 $BUFFER_ADDR0 $BUFFER_SIZE $SOF_MASK

# Descriptor 3: C2H read from Buffer1 (MM2S)
write_descriptor $DMA_DESC3 $DMA_DESC2 $BUFFER_ADDR1 $BUFFER_SIZE $EOF_MASK

echo "Descriptors write complete."

#--------------------- Check descriptors ---------------------#
echo "Checking descriptors..."

check_descriptor() {
    local desc_base=$1
    local next_desc=$2
    local buffer_addr=$3
    local buffer_size=$4
    local flags=$5

    read_dec=$(reg_read $((desc_base + 0x00)))
    if [ $read_dec -ne $((next_desc + XDMA_BIAS)) ]; then
        echo "\033[31m[Error] Address: 0x$(printf '%08x' $((desc_base + 0x00))) Value: 0x$(printf '%08x' $read_dec)\033[0m"
        exit 1
    fi

    read_dec=$(reg_read $((desc_base + 0x08)))
    if [ $read_dec -ne $buffer_addr ]; then
        echo "\033[31m[Error] Address: 0x$(printf '%08x' $((desc_base + 0x08))) Value: 0x$(printf '%08x' $read_dec)\033[0m"
        exit 1
    fi

    read_dec=$(reg_read $((desc_base + 0x18)))
    if [ $read_dec -ne $((buffer_size | flags)) ]; then
        echo "\033[31m[Error] Address: 0x$(printf '%08x' $((desc_base + 0x18))) Value: 0x$(printf '%08x' $read_dec)\033[0m"
        exit 1
    fi

    read_dec=$(reg_read $((desc_base + 0x1C)))
    if [ $read_dec -ne $((0)) ]; then
        echo "\033[31m[Error] Address: 0x$(printf '%08x' $((desc_base + 0x1C))) Value: 0x$(printf '%08x' $read_dec)\033[0m"
        exit 1
    fi
}

check_descriptor $DMA_DESC0 $DMA_DESC1 $BUFFER_ADDR0 $BUFFER_SIZE $SOF_MASK
check_descriptor $DMA_DESC1 $DMA_DESC0 $BUFFER_ADDR1 $BUFFER_SIZE $EOF_MASK
check_descriptor $DMA_DESC2 $DMA_DESC3 $BUFFER_ADDR0 $BUFFER_SIZE $SOF_MASK
check_descriptor $DMA_DESC3 $DMA_DESC2 $BUFFER_ADDR1 $BUFFER_SIZE $EOF_MASK

echo "Descriptors check complete."