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Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/descs_com.h')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/descs_com.h126
1 files changed, 126 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 000000000000..dd8d6e19dff6
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/descs_com.h
@@ -0,0 +1,126 @@
+/*******************************************************************************
+ 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