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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | /******************************************************************************* Header File to describe Normal/enhanced descriptor functions used for RING and CHAINED modes. Copyright(C) 2011 STMicroelectronics Ltd It defines all the functions used to handle the normal/enhanced descriptors in case of the DMA is configured to work in chained or in ring mode. This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, version 2, as published by the Free Software Foundation. This program is distributed in the hope 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, write to the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. The full GNU General Public License is included in this distribution in the file called "COPYING". Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> *******************************************************************************/ #if defined(CONFIG_STMMAC_RING) static inline void ehn_desc_rx_set_on_ring_chain(struct dma_desc *p, int end) { p->des01.erx.buffer2_size = BUF_SIZE_8KiB - 1; if (end) p->des01.erx.end_ring = 1; } static inline void ehn_desc_tx_set_on_ring_chain(struct dma_desc *p, int end) { if (end) p->des01.etx.end_ring = 1; } static inline void enh_desc_end_tx_desc(struct dma_desc *p, int ter) { p->des01.etx.end_ring = ter; } static inline void enh_set_tx_desc_len(struct dma_desc *p, int len) { if (unlikely(len > BUF_SIZE_4KiB)) { p->des01.etx.buffer1_size = BUF_SIZE_4KiB; p->des01.etx.buffer2_size = len - BUF_SIZE_4KiB; } else p->des01.etx.buffer1_size = len; } static inline void ndesc_rx_set_on_ring_chain(struct dma_desc *p, int end) { p->des01.rx.buffer2_size = BUF_SIZE_2KiB - 1; if (end) p->des01.rx.end_ring = 1; } static inline void ndesc_tx_set_on_ring_chain(struct dma_desc *p, int end) { if (end) p->des01.tx.end_ring = 1; } static inline void ndesc_end_tx_desc(struct dma_desc *p, int ter) { p->des01.tx.end_ring = ter; } static inline void norm_set_tx_desc_len(struct dma_desc *p, int len) { if (unlikely(len > BUF_SIZE_2KiB)) { p->des01.etx.buffer1_size = BUF_SIZE_2KiB - 1; p->des01.etx.buffer2_size = len - p->des01.etx.buffer1_size; } else p->des01.tx.buffer1_size = len; } #else static inline void ehn_desc_rx_set_on_ring_chain(struct dma_desc *p, int end) { p->des01.erx.second_address_chained = 1; } static inline void ehn_desc_tx_set_on_ring_chain(struct dma_desc *p, int end) { p->des01.etx.second_address_chained = 1; } static inline void enh_desc_end_tx_desc(struct dma_desc *p, int ter) { p->des01.etx.second_address_chained = 1; } static inline void enh_set_tx_desc_len(struct dma_desc *p, int len) { p->des01.etx.buffer1_size = len; } static inline void ndesc_rx_set_on_ring_chain(struct dma_desc *p, int end) { p->des01.rx.second_address_chained = 1; } static inline void ndesc_tx_set_on_ring_chain(struct dma_desc *p, int ring_size) { p->des01.tx.second_address_chained = 1; } static inline void ndesc_end_tx_desc(struct dma_desc *p, int ter) { p->des01.tx.second_address_chained = 1; } static inline void norm_set_tx_desc_len(struct dma_desc *p, int len) { p->des01.tx.buffer1_size = len; } #endif |