mirror of https://gitee.com/openkylin/linux.git
127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*******************************************************************************
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Header File to describe Normal/enhanced descriptor functions used for RING
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and CHAINED modes.
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Copyright(C) 2011 STMicroelectronics Ltd
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It defines all the functions used to handle the normal/enhanced
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descriptors in case of the DMA is configured to work in chained or
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in ring mode.
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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*******************************************************************************/
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#if defined(CONFIG_STMMAC_RING)
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static inline void ehn_desc_rx_set_on_ring_chain(struct dma_desc *p, int end)
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{
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p->des01.erx.buffer2_size = BUF_SIZE_8KiB - 1;
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if (end)
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p->des01.erx.end_ring = 1;
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}
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static inline void ehn_desc_tx_set_on_ring_chain(struct dma_desc *p, int end)
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{
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if (end)
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p->des01.etx.end_ring = 1;
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}
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static inline void enh_desc_end_tx_desc(struct dma_desc *p, int ter)
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{
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p->des01.etx.end_ring = ter;
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}
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static inline void enh_set_tx_desc_len(struct dma_desc *p, int len)
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{
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if (unlikely(len > BUF_SIZE_4KiB)) {
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p->des01.etx.buffer1_size = BUF_SIZE_4KiB;
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p->des01.etx.buffer2_size = len - BUF_SIZE_4KiB;
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} else
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p->des01.etx.buffer1_size = len;
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}
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static inline void ndesc_rx_set_on_ring_chain(struct dma_desc *p, int end)
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{
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p->des01.rx.buffer2_size = BUF_SIZE_2KiB - 1;
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if (end)
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p->des01.rx.end_ring = 1;
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}
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static inline void ndesc_tx_set_on_ring_chain(struct dma_desc *p, int end)
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{
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if (end)
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p->des01.tx.end_ring = 1;
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}
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static inline void ndesc_end_tx_desc(struct dma_desc *p, int ter)
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{
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p->des01.tx.end_ring = ter;
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}
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static inline void norm_set_tx_desc_len(struct dma_desc *p, int len)
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{
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if (unlikely(len > BUF_SIZE_2KiB)) {
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p->des01.etx.buffer1_size = BUF_SIZE_2KiB - 1;
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p->des01.etx.buffer2_size = len - p->des01.etx.buffer1_size;
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} else
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p->des01.tx.buffer1_size = len;
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}
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#else
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static inline void ehn_desc_rx_set_on_ring_chain(struct dma_desc *p, int end)
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{
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p->des01.erx.second_address_chained = 1;
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}
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static inline void ehn_desc_tx_set_on_ring_chain(struct dma_desc *p, int end)
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{
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p->des01.etx.second_address_chained = 1;
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}
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static inline void enh_desc_end_tx_desc(struct dma_desc *p, int ter)
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{
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p->des01.etx.second_address_chained = 1;
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}
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static inline void enh_set_tx_desc_len(struct dma_desc *p, int len)
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{
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p->des01.etx.buffer1_size = len;
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}
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static inline void ndesc_rx_set_on_ring_chain(struct dma_desc *p, int end)
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{
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p->des01.rx.second_address_chained = 1;
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}
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static inline void ndesc_tx_set_on_ring_chain(struct dma_desc *p, int ring_size)
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{
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p->des01.tx.second_address_chained = 1;
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}
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static inline void ndesc_end_tx_desc(struct dma_desc *p, int ter)
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{
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p->des01.tx.second_address_chained = 1;
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}
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static inline void norm_set_tx_desc_len(struct dma_desc *p, int len)
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{
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p->des01.tx.buffer1_size = len;
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}
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#endif
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