1ccea77e2a
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details [based] [from] [clk] [highbank] [c] you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 355 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154041.837383322@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
// 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 <isubramanian@apm.com>
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* Keyur Chudgar <kchudgar@apm.com>
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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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