From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/net/ethernet/stmicro/stmmac/descs_com.h | 121 ++++++++++++++++++++++++ 1 file changed, 121 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/descs_com.h (limited to 'drivers/net/ethernet/stmicro/stmmac/descs_com.h') diff --git a/drivers/net/ethernet/stmicro/stmmac/descs_com.h b/drivers/net/ethernet/stmicro/stmmac/descs_com.h new file mode 100644 index 0000000000..40f7f2da9c --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/descs_com.h @@ -0,0 +1,121 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/******************************************************************************* + 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. + + + Author: Giuseppe Cavallaro +*******************************************************************************/ + +#ifndef __DESC_COM_H__ +#define __DESC_COM_H__ + +/* Specific functions used for Ring mode */ + +/* Enhanced descriptors */ +static inline void ehn_desc_rx_set_on_ring(struct dma_desc *p, int end, + int bfsize) +{ + if (bfsize == BUF_SIZE_16KiB) + p->des1 |= cpu_to_le32((BUF_SIZE_8KiB + << ERDES1_BUFFER2_SIZE_SHIFT) + & ERDES1_BUFFER2_SIZE_MASK); + + if (end) + p->des1 |= cpu_to_le32(ERDES1_END_RING); +} + +static inline void enh_desc_end_tx_desc_on_ring(struct dma_desc *p, int end) +{ + if (end) + p->des0 |= cpu_to_le32(ETDES0_END_RING); + else + p->des0 &= cpu_to_le32(~ETDES0_END_RING); +} + +static inline void enh_set_tx_desc_len_on_ring(struct dma_desc *p, int len) +{ + if (unlikely(len > BUF_SIZE_4KiB)) { + p->des1 |= cpu_to_le32((((len - BUF_SIZE_4KiB) + << ETDES1_BUFFER2_SIZE_SHIFT) + & ETDES1_BUFFER2_SIZE_MASK) | (BUF_SIZE_4KiB + & ETDES1_BUFFER1_SIZE_MASK)); + } else + p->des1 |= cpu_to_le32((len & ETDES1_BUFFER1_SIZE_MASK)); +} + +/* Normal descriptors */ +static inline void ndesc_rx_set_on_ring(struct dma_desc *p, int end, int bfsize) +{ + if (bfsize >= BUF_SIZE_2KiB) { + int bfsize2; + + bfsize2 = min(bfsize - BUF_SIZE_2KiB + 1, BUF_SIZE_2KiB - 1); + p->des1 |= cpu_to_le32((bfsize2 << RDES1_BUFFER2_SIZE_SHIFT) + & RDES1_BUFFER2_SIZE_MASK); + } + + if (end) + p->des1 |= cpu_to_le32(RDES1_END_RING); +} + +static inline void ndesc_end_tx_desc_on_ring(struct dma_desc *p, int end) +{ + if (end) + p->des1 |= cpu_to_le32(TDES1_END_RING); + else + p->des1 &= cpu_to_le32(~TDES1_END_RING); +} + +static inline void norm_set_tx_desc_len_on_ring(struct dma_desc *p, int len) +{ + if (unlikely(len > BUF_SIZE_2KiB)) { + unsigned int buffer1 = (BUF_SIZE_2KiB - 1) + & TDES1_BUFFER1_SIZE_MASK; + p->des1 |= cpu_to_le32((((len - buffer1) + << TDES1_BUFFER2_SIZE_SHIFT) + & TDES1_BUFFER2_SIZE_MASK) | buffer1); + } else + p->des1 |= cpu_to_le32((len & TDES1_BUFFER1_SIZE_MASK)); +} + +/* Specific functions used for Chain mode */ + +/* Enhanced descriptors */ +static inline void ehn_desc_rx_set_on_chain(struct dma_desc *p) +{ + p->des1 |= cpu_to_le32(ERDES1_SECOND_ADDRESS_CHAINED); +} + +static inline void enh_desc_end_tx_desc_on_chain(struct dma_desc *p) +{ + p->des0 |= cpu_to_le32(ETDES0_SECOND_ADDRESS_CHAINED); +} + +static inline void enh_set_tx_desc_len_on_chain(struct dma_desc *p, int len) +{ + p->des1 |= cpu_to_le32(len & ETDES1_BUFFER1_SIZE_MASK); +} + +/* Normal descriptors */ +static inline void ndesc_rx_set_on_chain(struct dma_desc *p, int end) +{ + p->des1 |= cpu_to_le32(RDES1_SECOND_ADDRESS_CHAINED); +} + +static inline void ndesc_tx_set_on_chain(struct dma_desc *p) +{ + p->des1 |= cpu_to_le32(TDES1_SECOND_ADDRESS_CHAINED); +} + +static inline void norm_set_tx_desc_len_on_chain(struct dma_desc *p, int len) +{ + p->des1 |= cpu_to_le32(len & TDES1_BUFFER1_SIZE_MASK); +} +#endif /* __DESC_COM_H__ */ -- cgit v1.2.3