327 lines
8.1 KiB
C
327 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*******************************************************************************
|
|
This contains the functions to handle the normal descriptors.
|
|
|
|
Copyright (C) 2007-2009 STMicroelectronics Ltd
|
|
|
|
|
|
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
|
|
*******************************************************************************/
|
|
|
|
#include <linux/stmmac.h>
|
|
#include "common.h"
|
|
#include "descs_com.h"
|
|
|
|
static int ndesc_get_tx_status(void *data, struct stmmac_extra_stats *x,
|
|
struct dma_desc *p, void __iomem *ioaddr)
|
|
{
|
|
struct net_device_stats *stats = (struct net_device_stats *)data;
|
|
unsigned int tdes0 = le32_to_cpu(p->des0);
|
|
unsigned int tdes1 = le32_to_cpu(p->des1);
|
|
int ret = tx_done;
|
|
|
|
/* Get tx owner first */
|
|
if (unlikely(tdes0 & TDES0_OWN))
|
|
return tx_dma_own;
|
|
|
|
/* Verify tx error by looking at the last segment. */
|
|
if (likely(!(tdes1 & TDES1_LAST_SEGMENT)))
|
|
return tx_not_ls;
|
|
|
|
if (unlikely(tdes0 & TDES0_ERROR_SUMMARY)) {
|
|
if (unlikely(tdes0 & TDES0_UNDERFLOW_ERROR)) {
|
|
x->tx_underflow++;
|
|
stats->tx_fifo_errors++;
|
|
}
|
|
if (unlikely(tdes0 & TDES0_NO_CARRIER)) {
|
|
x->tx_carrier++;
|
|
stats->tx_carrier_errors++;
|
|
}
|
|
if (unlikely(tdes0 & TDES0_LOSS_CARRIER)) {
|
|
x->tx_losscarrier++;
|
|
stats->tx_carrier_errors++;
|
|
}
|
|
if (unlikely((tdes0 & TDES0_EXCESSIVE_DEFERRAL) ||
|
|
(tdes0 & TDES0_EXCESSIVE_COLLISIONS) ||
|
|
(tdes0 & TDES0_LATE_COLLISION))) {
|
|
unsigned int collisions;
|
|
|
|
collisions = (tdes0 & TDES0_COLLISION_COUNT_MASK) >> 3;
|
|
stats->collisions += collisions;
|
|
}
|
|
ret = tx_err;
|
|
}
|
|
|
|
if (tdes0 & TDES0_VLAN_FRAME)
|
|
x->tx_vlan++;
|
|
|
|
if (unlikely(tdes0 & TDES0_DEFERRED))
|
|
x->tx_deferred++;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ndesc_get_tx_len(struct dma_desc *p)
|
|
{
|
|
return (le32_to_cpu(p->des1) & RDES1_BUFFER1_SIZE_MASK);
|
|
}
|
|
|
|
/* This function verifies if each incoming frame has some errors
|
|
* and, if required, updates the multicast statistics.
|
|
* In case of success, it returns good_frame because the GMAC device
|
|
* is supposed to be 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 = good_frame;
|
|
unsigned int rdes0 = le32_to_cpu(p->des0);
|
|
struct net_device_stats *stats = (struct net_device_stats *)data;
|
|
|
|
if (unlikely(rdes0 & RDES0_OWN))
|
|
return dma_own;
|
|
|
|
if (unlikely(!(rdes0 & RDES0_LAST_DESCRIPTOR))) {
|
|
stats->rx_length_errors++;
|
|
return discard_frame;
|
|
}
|
|
|
|
if (unlikely(rdes0 & RDES0_ERROR_SUMMARY)) {
|
|
if (unlikely(rdes0 & RDES0_DESCRIPTOR_ERROR))
|
|
x->rx_desc++;
|
|
if (unlikely(rdes0 & RDES0_SA_FILTER_FAIL))
|
|
x->sa_filter_fail++;
|
|
if (unlikely(rdes0 & RDES0_OVERFLOW_ERROR))
|
|
x->overflow_error++;
|
|
if (unlikely(rdes0 & RDES0_IPC_CSUM_ERROR))
|
|
x->ipc_csum_error++;
|
|
if (unlikely(rdes0 & RDES0_COLLISION)) {
|
|
x->rx_collision++;
|
|
stats->collisions++;
|
|
}
|
|
if (unlikely(rdes0 & RDES0_CRC_ERROR)) {
|
|
x->rx_crc_errors++;
|
|
stats->rx_crc_errors++;
|
|
}
|
|
ret = discard_frame;
|
|
}
|
|
if (unlikely(rdes0 & RDES0_DRIBBLING))
|
|
x->dribbling_bit++;
|
|
|
|
if (unlikely(rdes0 & RDES0_LENGTH_ERROR)) {
|
|
x->rx_length++;
|
|
ret = discard_frame;
|
|
}
|
|
if (unlikely(rdes0 & RDES0_MII_ERROR)) {
|
|
x->rx_mii++;
|
|
ret = discard_frame;
|
|
}
|
|
#ifdef STMMAC_VLAN_TAG_USED
|
|
if (rdes0 & RDES0_VLAN_TAG)
|
|
x->vlan_tag++;
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
static void ndesc_init_rx_desc(struct dma_desc *p, int disable_rx_ic, int mode,
|
|
int end, int bfsize)
|
|
{
|
|
int bfsize1;
|
|
|
|
p->des0 |= cpu_to_le32(RDES0_OWN);
|
|
|
|
bfsize1 = min(bfsize, BUF_SIZE_2KiB - 1);
|
|
p->des1 |= cpu_to_le32(bfsize1 & RDES1_BUFFER1_SIZE_MASK);
|
|
|
|
if (mode == STMMAC_CHAIN_MODE)
|
|
ndesc_rx_set_on_chain(p, end);
|
|
else
|
|
ndesc_rx_set_on_ring(p, end, bfsize);
|
|
|
|
if (disable_rx_ic)
|
|
p->des1 |= cpu_to_le32(RDES1_DISABLE_IC);
|
|
}
|
|
|
|
static void ndesc_init_tx_desc(struct dma_desc *p, int mode, int end)
|
|
{
|
|
p->des0 &= cpu_to_le32(~TDES0_OWN);
|
|
if (mode == STMMAC_CHAIN_MODE)
|
|
ndesc_tx_set_on_chain(p);
|
|
else
|
|
ndesc_end_tx_desc_on_ring(p, end);
|
|
}
|
|
|
|
static int ndesc_get_tx_owner(struct dma_desc *p)
|
|
{
|
|
return (le32_to_cpu(p->des0) & TDES0_OWN) >> 31;
|
|
}
|
|
|
|
static void ndesc_set_tx_owner(struct dma_desc *p)
|
|
{
|
|
p->des0 |= cpu_to_le32(TDES0_OWN);
|
|
}
|
|
|
|
static void ndesc_set_rx_owner(struct dma_desc *p, int disable_rx_ic)
|
|
{
|
|
p->des0 |= cpu_to_le32(RDES0_OWN);
|
|
}
|
|
|
|
static int ndesc_get_tx_ls(struct dma_desc *p)
|
|
{
|
|
return (le32_to_cpu(p->des1) & TDES1_LAST_SEGMENT) >> 30;
|
|
}
|
|
|
|
static void ndesc_release_tx_desc(struct dma_desc *p, int mode)
|
|
{
|
|
int ter = (le32_to_cpu(p->des1) & TDES1_END_RING) >> 25;
|
|
|
|
memset(p, 0, offsetof(struct dma_desc, des2));
|
|
if (mode == STMMAC_CHAIN_MODE)
|
|
ndesc_tx_set_on_chain(p);
|
|
else
|
|
ndesc_end_tx_desc_on_ring(p, ter);
|
|
}
|
|
|
|
static void ndesc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
|
|
bool csum_flag, int mode, bool tx_own,
|
|
bool ls, unsigned int tot_pkt_len)
|
|
{
|
|
unsigned int tdes1 = le32_to_cpu(p->des1);
|
|
|
|
if (is_fs)
|
|
tdes1 |= TDES1_FIRST_SEGMENT;
|
|
else
|
|
tdes1 &= ~TDES1_FIRST_SEGMENT;
|
|
|
|
if (likely(csum_flag))
|
|
tdes1 |= (TX_CIC_FULL) << TDES1_CHECKSUM_INSERTION_SHIFT;
|
|
else
|
|
tdes1 &= ~(TX_CIC_FULL << TDES1_CHECKSUM_INSERTION_SHIFT);
|
|
|
|
if (ls)
|
|
tdes1 |= TDES1_LAST_SEGMENT;
|
|
|
|
p->des1 = cpu_to_le32(tdes1);
|
|
|
|
if (mode == STMMAC_CHAIN_MODE)
|
|
norm_set_tx_desc_len_on_chain(p, len);
|
|
else
|
|
norm_set_tx_desc_len_on_ring(p, len);
|
|
|
|
if (tx_own)
|
|
p->des0 |= cpu_to_le32(TDES0_OWN);
|
|
}
|
|
|
|
static void ndesc_set_tx_ic(struct dma_desc *p)
|
|
{
|
|
p->des1 |= cpu_to_le32(TDES1_INTERRUPT);
|
|
}
|
|
|
|
static int ndesc_get_rx_frame_len(struct dma_desc *p, int rx_coe_type)
|
|
{
|
|
unsigned int csum = 0;
|
|
|
|
/* The type-1 checksum offload engines append the checksum at
|
|
* the end of frame and the two bytes of checksum are added in
|
|
* the length.
|
|
* Adjust for that in the framelen for type-1 checksum offload
|
|
* engines
|
|
*/
|
|
if (rx_coe_type == STMMAC_RX_COE_TYPE1)
|
|
csum = 2;
|
|
|
|
return (((le32_to_cpu(p->des0) & RDES0_FRAME_LEN_MASK)
|
|
>> RDES0_FRAME_LEN_SHIFT) -
|
|
csum);
|
|
|
|
}
|
|
|
|
static void ndesc_enable_tx_timestamp(struct dma_desc *p)
|
|
{
|
|
p->des1 |= cpu_to_le32(TDES1_TIME_STAMP_ENABLE);
|
|
}
|
|
|
|
static int ndesc_get_tx_timestamp_status(struct dma_desc *p)
|
|
{
|
|
return (le32_to_cpu(p->des0) & TDES0_TIME_STAMP_STATUS) >> 17;
|
|
}
|
|
|
|
static void ndesc_get_timestamp(void *desc, u32 ats, u64 *ts)
|
|
{
|
|
struct dma_desc *p = (struct dma_desc *)desc;
|
|
u64 ns;
|
|
|
|
ns = le32_to_cpu(p->des2);
|
|
/* convert high/sec time stamp value to nanosecond */
|
|
ns += le32_to_cpu(p->des3) * 1000000000ULL;
|
|
|
|
*ts = ns;
|
|
}
|
|
|
|
static int ndesc_get_rx_timestamp_status(void *desc, void *next_desc, u32 ats)
|
|
{
|
|
struct dma_desc *p = (struct dma_desc *)desc;
|
|
|
|
if ((le32_to_cpu(p->des2) == 0xffffffff) &&
|
|
(le32_to_cpu(p->des3) == 0xffffffff))
|
|
/* timestamp is corrupted, hence don't store it */
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
static void ndesc_display_ring(void *head, unsigned int size, bool rx,
|
|
dma_addr_t dma_rx_phy, unsigned int desc_size)
|
|
{
|
|
struct dma_desc *p = (struct dma_desc *)head;
|
|
dma_addr_t dma_addr;
|
|
int i;
|
|
|
|
pr_info("%s descriptor ring:\n", rx ? "RX" : "TX");
|
|
|
|
for (i = 0; i < size; i++) {
|
|
u64 x;
|
|
dma_addr = dma_rx_phy + i * sizeof(*p);
|
|
|
|
x = *(u64 *)p;
|
|
pr_info("%03d [%pad]: 0x%x 0x%x 0x%x 0x%x",
|
|
i, &dma_addr,
|
|
(unsigned int)x, (unsigned int)(x >> 32),
|
|
p->des2, p->des3);
|
|
p++;
|
|
}
|
|
pr_info("\n");
|
|
}
|
|
|
|
static void ndesc_set_addr(struct dma_desc *p, dma_addr_t addr)
|
|
{
|
|
p->des2 = cpu_to_le32(addr);
|
|
}
|
|
|
|
static void ndesc_clear(struct dma_desc *p)
|
|
{
|
|
p->des2 = 0;
|
|
}
|
|
|
|
const 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,
|
|
.release_tx_desc = ndesc_release_tx_desc,
|
|
.prepare_tx_desc = ndesc_prepare_tx_desc,
|
|
.set_tx_ic = ndesc_set_tx_ic,
|
|
.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,
|
|
.enable_tx_timestamp = ndesc_enable_tx_timestamp,
|
|
.get_tx_timestamp_status = ndesc_get_tx_timestamp_status,
|
|
.get_timestamp = ndesc_get_timestamp,
|
|
.get_rx_timestamp_status = ndesc_get_rx_timestamp_status,
|
|
.display_ring = ndesc_display_ring,
|
|
.set_addr = ndesc_set_addr,
|
|
.clear = ndesc_clear,
|
|
};
|