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authorGiuseppe CAVALLARO <peppe.cavallaro@st.com>2013-03-26 04:43:05 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-26 12:53:36 -0400
commit4a7d666a7202744af32d4da31fb52857b7d86850 (patch)
tree37aaa3fc4b8aba60ff1d9557a9662e7d30a96c4d /drivers/net/ethernet/stmicro/stmmac/enh_desc.c
parentad999eee669d6a0439f5b9734e87eed50e776e32 (diff)
stmmac: reorganize chain/ring modes removing Koptions
Previously we had two Koptions to decide if the stmmac had to use either a ring or a chain to manage its descriptors. This patch removes the Kernel configuration options and it allow us to use the chain mode by passing a module option. Ring mode continues to be the default. Also with this patch, it will be easier to validate the driver built and guarantee that all the two modes always compile fine. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/enh_desc.c')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/enh_desc.c29
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c
index 2fc8ef95f97a..62f9f4e100fd 100644
--- a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c
@@ -229,14 +229,17 @@ static int enh_desc_get_rx_status(void *data, struct stmmac_extra_stats *x,
}
static void enh_desc_init_rx_desc(struct dma_desc *p, unsigned int ring_size,
- int disable_rx_ic)
+ int disable_rx_ic, int mode)
{
int i;
for (i = 0; i < ring_size; i++) {
p->des01.erx.own = 1;
p->des01.erx.buffer1_size = BUF_SIZE_8KiB - 1;
- ehn_desc_rx_set_on_ring_chain(p, (i == ring_size - 1));
+ if (mode == STMMAC_CHAIN_MODE)
+ ehn_desc_rx_set_on_chain(p, (i == ring_size - 1));
+ else
+ ehn_desc_rx_set_on_ring(p, (i == ring_size - 1));
if (disable_rx_ic)
p->des01.erx.disable_ic = 1;
@@ -244,13 +247,17 @@ static void enh_desc_init_rx_desc(struct dma_desc *p, unsigned int ring_size,
}
}
-static void enh_desc_init_tx_desc(struct dma_desc *p, unsigned int ring_size)
+static void enh_desc_init_tx_desc(struct dma_desc *p, unsigned int ring_size,
+ int mode)
{
int i;
for (i = 0; i < ring_size; i++) {
p->des01.etx.own = 0;
- ehn_desc_tx_set_on_ring_chain(p, (i == ring_size - 1));
+ if (mode == STMMAC_CHAIN_MODE)
+ ehn_desc_tx_set_on_chain(p, (i == ring_size - 1));
+ else
+ ehn_desc_tx_set_on_ring(p, (i == ring_size - 1));
p++;
}
}
@@ -280,20 +287,26 @@ static int enh_desc_get_tx_ls(struct dma_desc *p)
return p->des01.etx.last_segment;
}
-static void enh_desc_release_tx_desc(struct dma_desc *p)
+static void enh_desc_release_tx_desc(struct dma_desc *p, int mode)
{
int ter = p->des01.etx.end_ring;
memset(p, 0, offsetof(struct dma_desc, des2));
- enh_desc_end_tx_desc(p, ter);
+ if (mode == STMMAC_CHAIN_MODE)
+ enh_desc_end_tx_desc_on_chain(p, ter);
+ else
+ enh_desc_end_tx_desc_on_ring(p, ter);
}
static void enh_desc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
- int csum_flag)
+ int csum_flag, int mode)
{
p->des01.etx.first_segment = is_fs;
- enh_set_tx_desc_len(p, len);
+ if (mode == STMMAC_CHAIN_MODE)
+ enh_set_tx_desc_len_on_chain(p, len);
+ else
+ enh_set_tx_desc_len_on_ring(p, len);
if (likely(csum_flag))
p->des01.etx.checksum_insertion = cic_full;