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69 lines
1.6 KiB
69 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Applied Micro X-Gene SoC Ethernet v2 Driver |
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* |
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* Copyright (c) 2017, Applied Micro Circuits Corporation |
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* Author(s): Iyappan Subramanian <[email protected]> |
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* Keyur Chudgar <[email protected]> |
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*/ |
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#include "main.h" |
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/* create circular linked list of descriptors */ |
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void xge_setup_desc(struct xge_desc_ring *ring) |
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{ |
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struct xge_raw_desc *raw_desc; |
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dma_addr_t dma_h, next_dma; |
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u16 offset; |
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int i; |
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for (i = 0; i < XGENE_ENET_NUM_DESC; i++) { |
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raw_desc = &ring->raw_desc[i]; |
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offset = (i + 1) & (XGENE_ENET_NUM_DESC - 1); |
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next_dma = ring->dma_addr + (offset * XGENE_ENET_DESC_SIZE); |
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raw_desc->m0 = cpu_to_le64(SET_BITS(E, 1) | |
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SET_BITS(PKT_SIZE, SLOT_EMPTY)); |
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dma_h = upper_32_bits(next_dma); |
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raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, next_dma) | |
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SET_BITS(NEXT_DESC_ADDRH, dma_h)); |
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} |
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} |
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void xge_update_tx_desc_addr(struct xge_pdata *pdata) |
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{ |
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struct xge_desc_ring *ring = pdata->tx_ring; |
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dma_addr_t dma_addr = ring->dma_addr; |
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xge_wr_csr(pdata, DMATXDESCL, dma_addr); |
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xge_wr_csr(pdata, DMATXDESCH, upper_32_bits(dma_addr)); |
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ring->head = 0; |
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ring->tail = 0; |
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} |
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void xge_update_rx_desc_addr(struct xge_pdata *pdata) |
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{ |
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struct xge_desc_ring *ring = pdata->rx_ring; |
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dma_addr_t dma_addr = ring->dma_addr; |
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xge_wr_csr(pdata, DMARXDESCL, dma_addr); |
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xge_wr_csr(pdata, DMARXDESCH, upper_32_bits(dma_addr)); |
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ring->head = 0; |
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ring->tail = 0; |
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} |
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void xge_intr_enable(struct xge_pdata *pdata) |
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{ |
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u32 data; |
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data = RX_PKT_RCVD | TX_PKT_SENT; |
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xge_wr_csr(pdata, DMAINTRMASK, data); |
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} |
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void xge_intr_disable(struct xge_pdata *pdata) |
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{ |
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xge_wr_csr(pdata, DMAINTRMASK, 0); |
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}
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