mirror of https://gitee.com/openkylin/linux.git
237 lines
6.1 KiB
C
237 lines
6.1 KiB
C
/*******************************************************************************
|
|
This contains the functions to handle the normal descriptors.
|
|
|
|
Copyright (C) 2007-2009 STMicroelectronics Ltd
|
|
|
|
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>
|
|
*******************************************************************************/
|
|
|
|
#include "common.h"
|
|
|
|
static int ndesc_get_tx_status(void *data, struct stmmac_extra_stats *x,
|
|
struct dma_desc *p, unsigned long ioaddr)
|
|
{
|
|
int ret = 0;
|
|
struct net_device_stats *stats = (struct net_device_stats *)data;
|
|
|
|
if (unlikely(p->des01.tx.error_summary)) {
|
|
if (unlikely(p->des01.tx.underflow_error)) {
|
|
x->tx_underflow++;
|
|
stats->tx_fifo_errors++;
|
|
}
|
|
if (unlikely(p->des01.tx.no_carrier)) {
|
|
x->tx_carrier++;
|
|
stats->tx_carrier_errors++;
|
|
}
|
|
if (unlikely(p->des01.tx.loss_carrier)) {
|
|
x->tx_losscarrier++;
|
|
stats->tx_carrier_errors++;
|
|
}
|
|
if (unlikely((p->des01.tx.excessive_deferral) ||
|
|
(p->des01.tx.excessive_collisions) ||
|
|
(p->des01.tx.late_collision)))
|
|
stats->collisions += p->des01.tx.collision_count;
|
|
ret = -1;
|
|
}
|
|
if (unlikely(p->des01.tx.heartbeat_fail)) {
|
|
x->tx_heartbeat++;
|
|
stats->tx_heartbeat_errors++;
|
|
ret = -1;
|
|
}
|
|
if (unlikely(p->des01.tx.deferred))
|
|
x->tx_deferred++;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ndesc_get_tx_len(struct dma_desc *p)
|
|
{
|
|
return p->des01.tx.buffer1_size;
|
|
}
|
|
|
|
/* This function verifies if each incoming frame has some errors
|
|
* and, if required, updates the multicast statistics.
|
|
* In case of success, it returns csum_none becasue the device
|
|
* is not able to compute the csum in HW. */
|
|
static int ndesc_get_rx_status(void *data, struct stmmac_extra_stats *x,
|
|
struct dma_desc *p)
|
|
{
|
|
int ret = csum_none;
|
|
struct net_device_stats *stats = (struct net_device_stats *)data;
|
|
|
|
if (unlikely(p->des01.rx.last_descriptor == 0)) {
|
|
pr_warning("ndesc Error: Oversized Ethernet "
|
|
"frame spanned multiple buffers\n");
|
|
stats->rx_length_errors++;
|
|
return discard_frame;
|
|
}
|
|
|
|
if (unlikely(p->des01.rx.error_summary)) {
|
|
if (unlikely(p->des01.rx.descriptor_error))
|
|
x->rx_desc++;
|
|
if (unlikely(p->des01.rx.partial_frame_error))
|
|
x->rx_partial++;
|
|
if (unlikely(p->des01.rx.run_frame))
|
|
x->rx_runt++;
|
|
if (unlikely(p->des01.rx.frame_too_long))
|
|
x->rx_toolong++;
|
|
if (unlikely(p->des01.rx.collision)) {
|
|
x->rx_collision++;
|
|
stats->collisions++;
|
|
}
|
|
if (unlikely(p->des01.rx.crc_error)) {
|
|
x->rx_crc++;
|
|
stats->rx_crc_errors++;
|
|
}
|
|
ret = discard_frame;
|
|
}
|
|
if (unlikely(p->des01.rx.dribbling))
|
|
ret = discard_frame;
|
|
|
|
if (unlikely(p->des01.rx.length_error)) {
|
|
x->rx_length++;
|
|
ret = discard_frame;
|
|
}
|
|
if (unlikely(p->des01.rx.mii_error)) {
|
|
x->rx_mii++;
|
|
ret = discard_frame;
|
|
}
|
|
if (p->des01.rx.multicast_frame) {
|
|
x->rx_multicast++;
|
|
stats->multicast++;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void ndesc_init_rx_desc(struct dma_desc *p, unsigned int ring_size,
|
|
int disable_rx_ic)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ring_size; i++) {
|
|
p->des01.rx.own = 1;
|
|
p->des01.rx.buffer1_size = BUF_SIZE_2KiB - 1;
|
|
if (i == ring_size - 1)
|
|
p->des01.rx.end_ring = 1;
|
|
if (disable_rx_ic)
|
|
p->des01.rx.disable_ic = 1;
|
|
p++;
|
|
}
|
|
}
|
|
|
|
static void ndesc_init_tx_desc(struct dma_desc *p, unsigned int ring_size)
|
|
{
|
|
int i;
|
|
for (i = 0; i < ring_size; i++) {
|
|
p->des01.tx.own = 0;
|
|
if (i == ring_size - 1)
|
|
p->des01.tx.end_ring = 1;
|
|
p++;
|
|
}
|
|
}
|
|
|
|
static int ndesc_get_tx_owner(struct dma_desc *p)
|
|
{
|
|
return p->des01.tx.own;
|
|
}
|
|
|
|
static int ndesc_get_rx_owner(struct dma_desc *p)
|
|
{
|
|
return p->des01.rx.own;
|
|
}
|
|
|
|
static void ndesc_set_tx_owner(struct dma_desc *p)
|
|
{
|
|
p->des01.tx.own = 1;
|
|
}
|
|
|
|
static void ndesc_set_rx_owner(struct dma_desc *p)
|
|
{
|
|
p->des01.rx.own = 1;
|
|
}
|
|
|
|
static int ndesc_get_tx_ls(struct dma_desc *p)
|
|
{
|
|
return p->des01.tx.last_segment;
|
|
}
|
|
|
|
static void ndesc_release_tx_desc(struct dma_desc *p)
|
|
{
|
|
int ter = p->des01.tx.end_ring;
|
|
|
|
/* clean field used within the xmit */
|
|
p->des01.tx.first_segment = 0;
|
|
p->des01.tx.last_segment = 0;
|
|
p->des01.tx.buffer1_size = 0;
|
|
|
|
/* clean status reported */
|
|
p->des01.tx.error_summary = 0;
|
|
p->des01.tx.underflow_error = 0;
|
|
p->des01.tx.no_carrier = 0;
|
|
p->des01.tx.loss_carrier = 0;
|
|
p->des01.tx.excessive_deferral = 0;
|
|
p->des01.tx.excessive_collisions = 0;
|
|
p->des01.tx.late_collision = 0;
|
|
p->des01.tx.heartbeat_fail = 0;
|
|
p->des01.tx.deferred = 0;
|
|
|
|
/* set termination field */
|
|
p->des01.tx.end_ring = ter;
|
|
}
|
|
|
|
static void ndesc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
|
|
int csum_flag)
|
|
{
|
|
p->des01.tx.first_segment = is_fs;
|
|
p->des01.tx.buffer1_size = len;
|
|
}
|
|
|
|
static void ndesc_clear_tx_ic(struct dma_desc *p)
|
|
{
|
|
p->des01.tx.interrupt = 0;
|
|
}
|
|
|
|
static void ndesc_close_tx_desc(struct dma_desc *p)
|
|
{
|
|
p->des01.tx.last_segment = 1;
|
|
p->des01.tx.interrupt = 1;
|
|
}
|
|
|
|
static int ndesc_get_rx_frame_len(struct dma_desc *p)
|
|
{
|
|
return p->des01.rx.frame_length;
|
|
}
|
|
|
|
struct stmmac_desc_ops ndesc_ops = {
|
|
.tx_status = ndesc_get_tx_status,
|
|
.rx_status = ndesc_get_rx_status,
|
|
.get_tx_len = ndesc_get_tx_len,
|
|
.init_rx_desc = ndesc_init_rx_desc,
|
|
.init_tx_desc = ndesc_init_tx_desc,
|
|
.get_tx_owner = ndesc_get_tx_owner,
|
|
.get_rx_owner = ndesc_get_rx_owner,
|
|
.release_tx_desc = ndesc_release_tx_desc,
|
|
.prepare_tx_desc = ndesc_prepare_tx_desc,
|
|
.clear_tx_ic = ndesc_clear_tx_ic,
|
|
.close_tx_desc = ndesc_close_tx_desc,
|
|
.get_tx_ls = ndesc_get_tx_ls,
|
|
.set_tx_owner = ndesc_set_tx_owner,
|
|
.set_rx_owner = ndesc_set_rx_owner,
|
|
.get_rx_frame_len = ndesc_get_rx_frame_len,
|
|
};
|