Initial import

1 files changed, 134 insertions, 0 deletions

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 000000000..6f2cc78c5
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/descs_com.h
@@ -0,0 +1,134 @@
+/*******************************************************************************
+  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>
+*******************************************************************************/
+
+#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)
+{
+	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(struct dma_desc *p, int end)
+{
+	if (end)
+		p->des01.etx.end_ring = 1;
+}
+
+static inline void enh_desc_end_tx_desc_on_ring(struct dma_desc *p, int ter)
+{
+	p->des01.etx.end_ring = ter;
+}
+
+static inline void enh_set_tx_desc_len_on_ring(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;
+}
+
+/* Normal descriptors */
+static inline void ndesc_rx_set_on_ring(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(struct dma_desc *p, int end)
+{
+	if (end)
+		p->des01.tx.end_ring = 1;
+}
+
+static inline void ndesc_end_tx_desc_on_ring(struct dma_desc *p, int ter)
+{
+	p->des01.tx.end_ring = ter;
+}
+
+static inline void norm_set_tx_desc_len_on_ring(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;
+}
+
+/* Specific functions used for Chain mode */
+
+/* Enhanced descriptors */
+static inline void ehn_desc_rx_set_on_chain(struct dma_desc *p, int end)
+{
+	p->des01.erx.second_address_chained = 1;
+}
+
+static inline void ehn_desc_tx_set_on_chain(struct dma_desc *p, int end)
+{
+	p->des01.etx.second_address_chained = 1;
+}
+
+static inline void enh_desc_end_tx_desc_on_chain(struct dma_desc *p, int ter)
+{
+	p->des01.etx.second_address_chained = 1;
+}
+
+static inline void enh_set_tx_desc_len_on_chain(struct dma_desc *p, int len)
+{
+	p->des01.etx.buffer1_size = len;
+}
+
+/* Normal descriptors */
+static inline void ndesc_rx_set_on_chain(struct dma_desc *p, int end)
+{
+	p->des01.rx.second_address_chained = 1;
+}
+
+static inline void ndesc_tx_set_on_chain(struct dma_desc *p, int ring_size)
+{
+	p->des01.tx.second_address_chained = 1;
+}
+
+static inline void ndesc_end_tx_desc_on_chain(struct dma_desc *p, int ter)
+{
+	p->des01.tx.second_address_chained = 1;
+}
+
+static inline void norm_set_tx_desc_len_on_chain(struct dma_desc *p, int len)
+{
+	p->des01.tx.buffer1_size = len;
+}
+#endif /* __DESC_COM_H__ */