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// SPDX-License-Identifier: GPL-2.0-only
/*******************************************************************************
This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers.
ST Ethernet IPs are built around a Synopsys IP Core.
Copyright(C) 2007-2011 STMicroelectronics Ltd
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Documentation available at:
http://www.stlinux.com
Support available at:
https://bugzilla.stlinux.com/
*******************************************************************************/
#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/skbuff.h>
#include <linux/ethtool.h>
#include <linux/if_ether.h>
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/prefetch.h>
#include <linux/pinctrl/consumer.h>
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#endif /* CONFIG_DEBUG_FS */
#include <linux/net_tstamp.h>
#include <linux/phylink.h>
#include <linux/udp.h>
#include <net/pkt_cls.h>
#include "stmmac_ptp.h"
#include "stmmac.h"
#include <linux/reset.h>
#include <linux/of_mdio.h>
#include "dwmac1000.h"
#include "dwxgmac2.h"
#include "hwif.h"
#define STMMAC_ALIGN(x) ALIGN(ALIGN(x, SMP_CACHE_BYTES), 16)
#define TSO_MAX_BUFF_SIZE (SZ_16K - 1)
/* Module parameters */
#define TX_TIMEO 5000
static int watchdog = TX_TIMEO;
module_param(watchdog, int, 0644);
MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds (default 5s)");
static int debug = -1;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)");
static int phyaddr = -1;
module_param(phyaddr, int, 0444);
MODULE_PARM_DESC(phyaddr, "Physical device address");
#define STMMAC_TX_THRESH (DMA_TX_SIZE / 4)
#define STMMAC_RX_THRESH (DMA_RX_SIZE / 4)
static int flow_ctrl = FLOW_AUTO;
module_param(flow_ctrl, int, 0644);
MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]");
static int pause = PAUSE_TIME;
module_param(pause, int, 0644);
MODULE_PARM_DESC(pause, "Flow Control Pause Time");
#define TC_DEFAULT 64
static int tc = TC_DEFAULT;
module_param(tc, int, 0644);
MODULE_PARM_DESC(tc, "DMA threshold control value");
#define DEFAULT_BUFSIZE 1536
static int buf_sz = DEFAULT_BUFSIZE;
module_param(buf_sz, int, 0644);
MODULE_PARM_DESC(buf_sz, "DMA buffer size");
#define STMMAC_RX_COPYBREAK 256
static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
NETIF_MSG_LINK | NETIF_MSG_IFUP |
NETIF_MSG_IFDOWN | NETIF_MSG_TIMER);
#define STMMAC_DEFAULT_LPI_TIMER 1000
static int eee_timer = STMMAC_DEFAULT_LPI_TIMER;
module_param(eee_timer, int, 0644);
MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec");
#define STMMAC_LPI_T(x) (jiffies + msecs_to_jiffies(x))
/* By default the driver will use the ring mode to manage tx and rx descriptors,
* but allow user to force to use the chain instead of the ring
*/
static unsigned int chain_mode;
module_param(chain_mode, int, 0444);
MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode");
static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
#ifdef CONFIG_DEBUG_FS
static const struct net_device_ops stmmac_netdev_ops;
static void stmmac_init_fs(struct net_device *dev);
static void stmmac_exit_fs(struct net_device *dev);
#endif
#define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x))
/**
* stmmac_verify_args - verify the driver parameters.
* Description: it checks the driver parameters and set a default in case of
* errors.
*/
static void stmmac_verify_args(void)
{
if (unlikely(watchdog < 0))
watchdog = TX_TIMEO;
if (unlikely((buf_sz < DEFAULT_BUFSIZE) || (buf_sz > BUF_SIZE_16KiB)))
buf_sz = DEFAULT_BUFSIZE;
if (unlikely(flow_ctrl > 1))
flow_ctrl = FLOW_AUTO;
else if (likely(flow_ctrl < 0))
flow_ctrl = FLOW_OFF;
if (unlikely((pause < 0) || (pause > 0xffff)))
pause = PAUSE_TIME;
if (eee_timer < 0)
eee_timer = STMMAC_DEFAULT_LPI_TIMER;
}
/**
* stmmac_disable_all_queues - Disable all queues
* @priv: driver private structure
*/
static void stmmac_disable_all_queues(struct stmmac_priv *priv)
{
u32 rx_queues_cnt = priv->plat->rx_queues_to_use;
u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
u32 maxq = max(rx_queues_cnt, tx_queues_cnt);
u32 queue;
for (queue = 0; queue < maxq; queue++) {
struct stmmac_channel *ch = &priv->channel[queue];
if (queue < rx_queues_cnt)
napi_disable(&ch->rx_napi);
if (queue < tx_queues_cnt)
napi_disable(&ch->tx_napi);
}
}
/**
* stmmac_enable_all_queues - Enable all queues
* @priv: driver private structure
*/
static void stmmac_enable_all_queues(struct stmmac_priv *priv)
{
u32 rx_queues_cnt = priv->plat->rx_queues_to_use;
u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
u32 maxq = max(rx_queues_cnt, tx_queues_cnt);
u32 queue;
for (queue = 0; queue < maxq; queue++) {
struct stmmac_channel *ch = &priv->channel[queue];
if (queue < rx_queues_cnt)
napi_enable(&ch->rx_napi);
if (queue < tx_queues_cnt)
napi_enable(&ch->tx_napi);
}
}
/**
* stmmac_stop_all_queues - Stop all queues
* @priv: driver private structure
*/
static void stmmac_stop_all_queues(struct stmmac_priv *priv)
{
u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
u32 queue;
for (queue = 0; queue < tx_queues_cnt; queue++)
netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue));
}
/**
* stmmac_start_all_queues - Start all queues
* @priv: driver private structure
*/
static void stmmac_start_all_queues(struct stmmac_priv *priv)
{
u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
u32 queue;
for (queue = 0; queue < tx_queues_cnt; queue++)
netif_tx_start_queue(netdev_get_tx_queue(priv->dev, queue));
}
static void stmmac_service_event_schedule(struct stmmac_priv *priv)
{
if (!test_bit(STMMAC_DOWN, &priv->state) &&
!test_and_set_bit(STMMAC_SERVICE_SCHED, &priv->state))
queue_work(priv->wq, &priv->service_task);
}
static void stmmac_global_err(struct stmmac_priv *priv)
{
netif_carrier_off(priv->dev);
set_bit(STMMAC_RESET_REQUESTED, &priv->state);
stmmac_service_event_schedule(priv);
}
/**
* stmmac_clk_csr_set - dynamically set the MDC clock
* @priv: driver private structure
* Description: this is to dynamically set the MDC clock according to the csr
* clock input.
* Note:
* If a specific clk_csr value is passed from the platform
* this means that the CSR Clock Range selection cannot be
* changed at run-time and it is fixed (as reported in the driver
* documentation). Viceversa the driver will try to set the MDC
* clock dynamically according to the actual clock input.
*/
static void stmmac_clk_csr_set(struct stmmac_priv *priv)
{
u32 clk_rate;
clk_rate = clk_get_rate(priv->plat->stmmac_clk);
/* Platform provided default clk_csr would be assumed valid
* for all other cases except for the below mentioned ones.
* For values higher than the IEEE 802.3 specified frequency
* we can not estimate the proper divider as it is not known
* the frequency of clk_csr_i. So we do not change the default
* divider.
*/
if (!(priv->clk_csr & MAC_CSR_H_FRQ_MASK)) {
if (clk_rate < CSR_F_35M)
priv->clk_csr = STMMAC_CSR_20_35M;
else if ((clk_rate >= CSR_F_35M) && (clk_rate < CSR_F_60M))
priv->clk_csr = STMMAC_CSR_35_60M;
else if ((clk_rate >= CSR_F_60M) && (clk_rate < CSR_F_100M))
priv->clk_csr = STMMAC_CSR_60_100M;
else if ((clk_rate >= CSR_F_100M) && (clk_rate < CSR_F_150M))
priv->clk_csr = STMMAC_CSR_100_150M;
else if ((clk_rate >= CSR_F_150M) && (clk_rate < CSR_F_250M))
priv->clk_csr = STMMAC_CSR_150_250M;
else if ((clk_rate >= CSR_F_250M) && (clk_rate < CSR_F_300M))
priv->clk_csr = STMMAC_CSR_250_300M;
}
if (priv->plat->has_sun8i) {
if (clk_rate > 160000000)
priv->clk_csr = 0x03;
else if (clk_rate > 80000000)
priv->clk_csr = 0x02;
else if (clk_rate > 40000000)
priv->clk_csr = 0x01;
else
priv->clk_csr = 0;
}
if (priv->plat->has_xgmac) {
if (clk_rate > 400000000)
priv->clk_csr = 0x5;
else if (clk_rate > 350000000)
priv->clk_csr = 0x4;
else if (clk_rate > 300000000)
priv->clk_csr = 0x3;
else if (clk_rate > 250000000)
priv->clk_csr = 0x2;
else if (clk_rate > 150000000)
priv->clk_csr = 0x1;
else
priv->clk_csr = 0x0;
}
}
static void print_pkt(unsigned char *buf, int len)
{
pr_debug("len = %d byte, buf addr: 0x%p\n", len, buf);
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len);
}
static inline u32 stmmac_tx_avail(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
u32 avail;
if (tx_q->dirty_tx > tx_q->cur_tx)
avail = tx_q->dirty_tx - tx_q->cur_tx - 1;
else
avail = DMA_TX_SIZE - tx_q->cur_tx + tx_q->dirty_tx - 1;
return avail;
}
/**
* stmmac_rx_dirty - Get RX queue dirty
* @priv: driver private structure
* @queue: RX queue index
*/
static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
u32 dirty;
if (rx_q->dirty_rx <= rx_q->cur_rx)
dirty = rx_q->cur_rx - rx_q->dirty_rx;
else
dirty = DMA_RX_SIZE - rx_q->dirty_rx + rx_q->cur_rx;
return dirty;
}
/**
* stmmac_enable_eee_mode - check and enter in LPI mode
* @priv: driver private structure
* Description: this function is to verify and enter in LPI mode in case of
* EEE.
*/
static void stmmac_enable_eee_mode(struct stmmac_priv *priv)
{
u32 tx_cnt = priv->plat->tx_queues_to_use;
u32 queue;
/* check if all TX queues have the work finished */
for (queue = 0; queue < tx_cnt; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
if (tx_q->dirty_tx != tx_q->cur_tx)
return; /* still unfinished work */
}
/* Check and enter in LPI mode */
if (!priv->tx_path_in_lpi_mode)
stmmac_set_eee_mode(priv, priv->hw,
priv->plat->en_tx_lpi_clockgating);
}
/**
* stmmac_disable_eee_mode - disable and exit from LPI mode
* @priv: driver private structure
* Description: this function is to exit and disable EEE in case of
* LPI state is true. This is called by the xmit.
*/
void stmmac_disable_eee_mode(struct stmmac_priv *priv)
{
stmmac_reset_eee_mode(priv, priv->hw);
del_timer_sync(&priv->eee_ctrl_timer);
priv->tx_path_in_lpi_mode = false;
}
/**
* stmmac_eee_ctrl_timer - EEE TX SW timer.
* @arg : data hook
* Description:
* if there is no data transfer and if we are not in LPI state,
* then MAC Transmitter can be moved to LPI state.
*/
static void stmmac_eee_ctrl_timer(struct timer_list *t)
{
struct stmmac_priv *priv = from_timer(priv, t, eee_ctrl_timer);
stmmac_enable_eee_mode(priv);
mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer));
}
/**
* stmmac_eee_init - init EEE
* @priv: driver private structure
* Description:
* if the GMAC supports the EEE (from the HW cap reg) and the phy device
* can also manage EEE, this function enable the LPI state and start related
* timer.
*/
bool stmmac_eee_init(struct stmmac_priv *priv)
{
int tx_lpi_timer = priv->tx_lpi_timer;
/* Using PCS we cannot dial with the phy registers at this stage
* so we do not support extra feature like EEE.
*/
if (priv->hw->pcs == STMMAC_PCS_TBI ||
priv->hw->pcs == STMMAC_PCS_RTBI)
return false;
/* Check if MAC core supports the EEE feature. */
if (!priv->dma_cap.eee)
return false;
mutex_lock(&priv->lock);
/* Check if it needs to be deactivated */
if (!priv->eee_active) {
if (priv->eee_enabled) {
netdev_dbg(priv->dev, "disable EEE\n");
del_timer_sync(&priv->eee_ctrl_timer);
stmmac_set_eee_timer(priv, priv->hw, 0, tx_lpi_timer);
}
mutex_unlock(&priv->lock);
return false;
}
if (priv->eee_active && !priv->eee_enabled) {
timer_setup(&priv->eee_ctrl_timer, stmmac_eee_ctrl_timer, 0);
mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer));
stmmac_set_eee_timer(priv, priv->hw, STMMAC_DEFAULT_LIT_LS,
tx_lpi_timer);
}
mutex_unlock(&priv->lock);
netdev_dbg(priv->dev, "Energy-Efficient Ethernet initialized\n");
return true;
}
/* stmmac_get_tx_hwtstamp - get HW TX timestamps
* @priv: driver private structure
* @p : descriptor pointer
* @skb : the socket buffer
* Description :
* This function will read timestamp from the descriptor & pass it to stack.
* and also perform some sanity checks.
*/
static void stmmac_get_tx_hwtstamp(struct stmmac_priv *priv,
struct dma_desc *p, struct sk_buff *skb)
{
struct skb_shared_hwtstamps shhwtstamp;
bool found = false;
u64 ns = 0;
if (!priv->hwts_tx_en)
return;
/* exit if skb doesn't support hw tstamp */
if (likely(!skb || !(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)))
return;
/* check tx tstamp status */
if (stmmac_get_tx_timestamp_status(priv, p)) {
stmmac_get_timestamp(priv, p, priv->adv_ts, &ns);
found = true;
} else if (!stmmac_get_mac_tx_timestamp(priv, priv->hw, &ns)) {
found = true;
}
if (found) {
memset(&shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps));
shhwtstamp.hwtstamp = ns_to_ktime(ns);
netdev_dbg(priv->dev, "get valid TX hw timestamp %llu\n", ns);
/* pass tstamp to stack */
skb_tstamp_tx(skb, &shhwtstamp);
}
}
/* stmmac_get_rx_hwtstamp - get HW RX timestamps
* @priv: driver private structure
* @p : descriptor pointer
* @np : next descriptor pointer
* @skb : the socket buffer
* Description :
* This function will read received packet's timestamp from the descriptor
* and pass it to stack. It also perform some sanity checks.
*/
static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, struct dma_desc *p,
struct dma_desc *np, struct sk_buff *skb)
{
struct skb_shared_hwtstamps *shhwtstamp = NULL;
struct dma_desc *desc = p;
u64 ns = 0;
if (!priv->hwts_rx_en)
return;
/* For GMAC4, the valid timestamp is from CTX next desc. */
if (priv->plat->has_gmac4 || priv->plat->has_xgmac)
desc = np;
/* Check if timestamp is available */
if (stmmac_get_rx_timestamp_status(priv, p, np, priv->adv_ts)) {
stmmac_get_timestamp(priv, desc, priv->adv_ts, &ns);
netdev_dbg(priv->dev, "get valid RX hw timestamp %llu\n", ns);
shhwtstamp = skb_hwtstamps(skb);
memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps));
shhwtstamp->hwtstamp = ns_to_ktime(ns);
} else {
netdev_dbg(priv->dev, "cannot get RX hw timestamp\n");
}
}
/**
* stmmac_hwtstamp_set - control hardware timestamping.
* @dev: device pointer.
* @ifr: An IOCTL specific structure, that can contain a pointer to
* a proprietary structure used to pass information to the driver.
* Description:
* This function configures the MAC to enable/disable both outgoing(TX)
* and incoming(RX) packets time stamping based on user input.
* Return Value:
* 0 on success and an appropriate -ve integer on failure.
*/
static int stmmac_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
{
struct stmmac_priv *priv = netdev_priv(dev);
struct hwtstamp_config config;
struct timespec64 now;
u64 temp = 0;
u32 ptp_v2 = 0;
u32 tstamp_all = 0;
u32 ptp_over_ipv4_udp = 0;
u32 ptp_over_ipv6_udp = 0;
u32 ptp_over_ethernet = 0;
u32 snap_type_sel = 0;
u32 ts_master_en = 0;
u32 ts_event_en = 0;
u32 sec_inc = 0;
u32 value = 0;
bool xmac;
xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac;
if (!(priv->dma_cap.time_stamp || priv->adv_ts)) {
netdev_alert(priv->dev, "No support for HW time stamping\n");
priv->hwts_tx_en = 0;
priv->hwts_rx_en = 0;
return -EOPNOTSUPP;
}
if (copy_from_user(&config, ifr->ifr_data,
sizeof(config)))
return -EFAULT;
netdev_dbg(priv->dev, "%s config flags:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
__func__, config.flags, config.tx_type, config.rx_filter);
/* reserved for future extensions */
if (config.flags)
return -EINVAL;
if (config.tx_type != HWTSTAMP_TX_OFF &&
config.tx_type != HWTSTAMP_TX_ON)
return -ERANGE;
if (priv->adv_ts) {
switch (config.rx_filter) {
case HWTSTAMP_FILTER_NONE:
/* time stamp no incoming packet at all */
config.rx_filter = HWTSTAMP_FILTER_NONE;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
/* PTP v1, UDP, any kind of event packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
/* 'xmac' hardware can support Sync, Pdelay_Req and
* Pdelay_resp by setting bit14 and bits17/16 to 01
* This leaves Delay_Req timestamps out.
* Enable all events *and* general purpose message
* timestamping
*/
snap_type_sel = PTP_TCR_SNAPTYPSEL_1;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
/* PTP v1, UDP, Sync packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
/* take time stamp for SYNC messages only */
ts_event_en = PTP_TCR_TSEVNTENA;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
break;
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
/* PTP v1, UDP, Delay_req packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
/* take time stamp for Delay_Req messages only */
ts_master_en = PTP_TCR_TSMSTRENA;
ts_event_en = PTP_TCR_TSEVNTENA;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
/* PTP v2, UDP, any kind of event packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
ptp_v2 = PTP_TCR_TSVER2ENA;
/* take time stamp for all event messages */
snap_type_sel = PTP_TCR_SNAPTYPSEL_1;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
/* PTP v2, UDP, Sync packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC;
ptp_v2 = PTP_TCR_TSVER2ENA;
/* take time stamp for SYNC messages only */
ts_event_en = PTP_TCR_TSEVNTENA;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
/* PTP v2, UDP, Delay_req packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ;
ptp_v2 = PTP_TCR_TSVER2ENA;
/* take time stamp for Delay_Req messages only */
ts_master_en = PTP_TCR_TSMSTRENA;
ts_event_en = PTP_TCR_TSEVNTENA;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
break;
case HWTSTAMP_FILTER_PTP_V2_EVENT:
/* PTP v2/802.AS1 any layer, any kind of event packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
ptp_v2 = PTP_TCR_TSVER2ENA;
snap_type_sel = PTP_TCR_SNAPTYPSEL_1;
ts_event_en = PTP_TCR_TSEVNTENA;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
ptp_over_ethernet = PTP_TCR_TSIPENA;
break;
case HWTSTAMP_FILTER_PTP_V2_SYNC:
/* PTP v2/802.AS1, any layer, Sync packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
ptp_v2 = PTP_TCR_TSVER2ENA;
/* take time stamp for SYNC messages only */
ts_event_en = PTP_TCR_TSEVNTENA;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
ptp_over_ethernet = PTP_TCR_TSIPENA;
break;
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
/* PTP v2/802.AS1, any layer, Delay_req packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
ptp_v2 = PTP_TCR_TSVER2ENA;
/* take time stamp for Delay_Req messages only */
ts_master_en = PTP_TCR_TSMSTRENA;
ts_event_en = PTP_TCR_TSEVNTENA;
ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
ptp_over_ethernet = PTP_TCR_TSIPENA;
break;
case HWTSTAMP_FILTER_NTP_ALL:
case HWTSTAMP_FILTER_ALL:
/* time stamp any incoming packet */
config.rx_filter = HWTSTAMP_FILTER_ALL;
tstamp_all = PTP_TCR_TSENALL;
break;
default:
return -ERANGE;
}
} else {
switch (config.rx_filter) {
case HWTSTAMP_FILTER_NONE:
config.rx_filter = HWTSTAMP_FILTER_NONE;
break;
default:
/* PTP v1, UDP, any kind of event packet */
config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
break;
}
}
priv->hwts_rx_en = ((config.rx_filter == HWTSTAMP_FILTER_NONE) ? 0 : 1);
priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON;
if (!priv->hwts_tx_en && !priv->hwts_rx_en)
stmmac_config_hw_tstamping(priv, priv->ptpaddr, 0);
else {
value = (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | PTP_TCR_TSCTRLSSR |
tstamp_all | ptp_v2 | ptp_over_ethernet |
ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en |
ts_master_en | snap_type_sel);
stmmac_config_hw_tstamping(priv, priv->ptpaddr, value);
/* program Sub Second Increment reg */
stmmac_config_sub_second_increment(priv,
priv->ptpaddr, priv->plat->clk_ptp_rate,
xmac, &sec_inc);
temp = div_u64(1000000000ULL, sec_inc);
/* Store sub second increment and flags for later use */
priv->sub_second_inc = sec_inc;
priv->systime_flags = value;
/* calculate default added value:
* formula is :
* addend = (2^32)/freq_div_ratio;
* where, freq_div_ratio = 1e9ns/sec_inc
*/
temp = (u64)(temp << 32);
priv->default_addend = div_u64(temp, priv->plat->clk_ptp_rate);
stmmac_config_addend(priv, priv->ptpaddr, priv->default_addend);
/* initialize system time */
ktime_get_real_ts64(&now);
/* lower 32 bits of tv_sec are safe until y2106 */
stmmac_init_systime(priv, priv->ptpaddr,
(u32)now.tv_sec, now.tv_nsec);
}
memcpy(&priv->tstamp_config, &config, sizeof(config));
return copy_to_user(ifr->ifr_data, &config,
sizeof(config)) ? -EFAULT : 0;
}
/**
* stmmac_hwtstamp_get - read hardware timestamping.
* @dev: device pointer.
* @ifr: An IOCTL specific structure, that can contain a pointer to
* a proprietary structure used to pass information to the driver.
* Description:
* This function obtain the current hardware timestamping settings
as requested.
*/
static int stmmac_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
{
struct stmmac_priv *priv = netdev_priv(dev);
struct hwtstamp_config *config = &priv->tstamp_config;
if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp))
return -EOPNOTSUPP;
return copy_to_user(ifr->ifr_data, config,
sizeof(*config)) ? -EFAULT : 0;
}
/**
* stmmac_init_ptp - init PTP
* @priv: driver private structure
* Description: this is to verify if the HW supports the PTPv1 or PTPv2.
* This is done by looking at the HW cap. register.
* This function also registers the ptp driver.
*/
static int stmmac_init_ptp(struct stmmac_priv *priv)
{
bool xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac;
if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp))
return -EOPNOTSUPP;
priv->adv_ts = 0;
/* Check if adv_ts can be enabled for dwmac 4.x / xgmac core */
if (xmac && priv->dma_cap.atime_stamp)
priv->adv_ts = 1;
/* Dwmac 3.x core with extend_desc can support adv_ts */
else if (priv->extend_desc && priv->dma_cap.atime_stamp)
priv->adv_ts = 1;
if (priv->dma_cap.time_stamp)
netdev_info(priv->dev, "IEEE 1588-2002 Timestamp supported\n");
if (priv->adv_ts)
netdev_info(priv->dev,
"IEEE 1588-2008 Advanced Timestamp supported\n");
priv->hwts_tx_en = 0;
priv->hwts_rx_en = 0;
stmmac_ptp_register(priv);
return 0;
}
static void stmmac_release_ptp(struct stmmac_priv *priv)
{
if (priv->plat->clk_ptp_ref)
clk_disable_unprepare(priv->plat->clk_ptp_ref);
stmmac_ptp_unregister(priv);
}
/**
* stmmac_mac_flow_ctrl - Configure flow control in all queues
* @priv: driver private structure
* Description: It is used for configuring the flow control in all queues
*/
static void stmmac_mac_flow_ctrl(struct stmmac_priv *priv, u32 duplex)
{
u32 tx_cnt = priv->plat->tx_queues_to_use;
stmmac_flow_ctrl(priv, priv->hw, duplex, priv->flow_ctrl,
priv->pause, tx_cnt);
}
static void stmmac_validate(struct phylink_config *config,
unsigned long *supported,
struct phylink_link_state *state)
{
struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));
__ETHTOOL_DECLARE_LINK_MODE_MASK(mac_supported) = { 0, };
__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
int tx_cnt = priv->plat->tx_queues_to_use;
int max_speed = priv->plat->max_speed;
phylink_set(mac_supported, 10baseT_Half);
phylink_set(mac_supported, 10baseT_Full);
phylink_set(mac_supported, 100baseT_Half);
phylink_set(mac_supported, 100baseT_Full);
phylink_set(mac_supported, 1000baseT_Half);
phylink_set(mac_supported, 1000baseT_Full);
phylink_set(mac_supported, 1000baseKX_Full);
phylink_set(mac_supported, Autoneg);
phylink_set(mac_supported, Pause);
phylink_set(mac_supported, Asym_Pause);
phylink_set_port_modes(mac_supported);
/* Cut down 1G if asked to */
if ((max_speed > 0) && (max_speed < 1000)) {
phylink_set(mask, 1000baseT_Full);
phylink_set(mask, 1000baseX_Full);
} else if (priv->plat->has_xgmac) {
if (!max_speed || (max_speed >= 2500)) {
phylink_set(mac_supported, 2500baseT_Full);
phylink_set(mac_supported, 2500baseX_Full);
}
if (!max_speed || (max_speed >= 5000)) {
phylink_set(mac_supported, 5000baseT_Full);
}
if (!max_speed || (max_speed >= 10000)) {
phylink_set(mac_supported, 10000baseSR_Full);
phylink_set(mac_supported, 10000baseLR_Full);
phylink_set(mac_supported, 10000baseER_Full);
phylink_set(mac_supported, 10000baseLRM_Full);
phylink_set(mac_supported, 10000baseT_Full);
phylink_set(mac_supported, 10000baseKX4_Full);
phylink_set(mac_supported, 10000baseKR_Full);
}
}
/* Half-Duplex can only work with single queue */
if (tx_cnt > 1) {
phylink_set(mask, 10baseT_Half);
phylink_set(mask, 100baseT_Half);
phylink_set(mask, 1000baseT_Half);
}
bitmap_and(supported, supported, mac_supported,
__ETHTOOL_LINK_MODE_MASK_NBITS);
bitmap_andnot(supported, supported, mask,
__ETHTOOL_LINK_MODE_MASK_NBITS);
bitmap_and(state->advertising, state->advertising, mac_supported,
__ETHTOOL_LINK_MODE_MASK_NBITS);
bitmap_andnot(state->advertising, state->advertising, mask,
__ETHTOOL_LINK_MODE_MASK_NBITS);
}
static void stmmac_mac_pcs_get_state(struct phylink_config *config,
struct phylink_link_state *state)
{
state->link = 0;
}
static void stmmac_mac_config(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state)
{
struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));
u32 ctrl;
ctrl = readl(priv->ioaddr + MAC_CTRL_REG);
ctrl &= ~priv->hw->link.speed_mask;
if (state->interface == PHY_INTERFACE_MODE_USXGMII) {
switch (state->speed) {
case SPEED_10000:
ctrl |= priv->hw->link.xgmii.speed10000;
break;
case SPEED_5000:
ctrl |= priv->hw->link.xgmii.speed5000;
break;
case SPEED_2500:
ctrl |= priv->hw->link.xgmii.speed2500;
break;
default:
return;
}
} else {
switch (state->speed) {
case SPEED_2500:
ctrl |= priv->hw->link.speed2500;
break;
case SPEED_1000:
ctrl |= priv->hw->link.speed1000;
break;
case SPEED_100:
ctrl |= priv->hw->link.speed100;
break;
case SPEED_10:
ctrl |= priv->hw->link.speed10;
break;
default:
return;
}
}
priv->speed = state->speed;
if (priv->plat->fix_mac_speed)
priv->plat->fix_mac_speed(priv->plat->bsp_priv, state->speed);
if (!state->duplex)
ctrl &= ~priv->hw->link.duplex;
else
ctrl |= priv->hw->link.duplex;
/* Flow Control operation */
if (state->pause)
stmmac_mac_flow_ctrl(priv, state->duplex);
writel(ctrl, priv->ioaddr + MAC_CTRL_REG);
}
static void stmmac_mac_an_restart(struct phylink_config *config)
{
/* Not Supported */
}
static void stmmac_mac_link_down(struct phylink_config *config,
unsigned int mode, phy_interface_t interface)
{
struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));
stmmac_mac_set(priv, priv->ioaddr, false);
priv->eee_active = false;
stmmac_eee_init(priv);
stmmac_set_eee_pls(priv, priv->hw, false);
}
static void stmmac_mac_link_up(struct phylink_config *config,
unsigned int mode, phy_interface_t interface,
struct phy_device *phy)
{
struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));
stmmac_mac_set(priv, priv->ioaddr, true);
if (phy && priv->dma_cap.eee) {
priv->eee_active = phy_init_eee(phy, 1) >= 0;
priv->eee_enabled = stmmac_eee_init(priv);
stmmac_set_eee_pls(priv, priv->hw, true);
}
}
static const struct phylink_mac_ops stmmac_phylink_mac_ops = {
.validate = stmmac_validate,
.mac_pcs_get_state = stmmac_mac_pcs_get_state,
.mac_config = stmmac_mac_config,
.mac_an_restart = stmmac_mac_an_restart,
.mac_link_down = stmmac_mac_link_down,
.mac_link_up = stmmac_mac_link_up,
};
/**
* stmmac_check_pcs_mode - verify if RGMII/SGMII is supported
* @priv: driver private structure
* Description: this is to verify if the HW supports the PCS.
* Physical Coding Sublayer (PCS) interface that can be used when the MAC is
* configured for the TBI, RTBI, or SGMII PHY interface.
*/
static void stmmac_check_pcs_mode(struct stmmac_priv *priv)
{
int interface = priv->plat->interface;
if (priv->dma_cap.pcs) {
if ((interface == PHY_INTERFACE_MODE_RGMII) ||
(interface == PHY_INTERFACE_MODE_RGMII_ID) ||
(interface == PHY_INTERFACE_MODE_RGMII_RXID) ||
(interface == PHY_INTERFACE_MODE_RGMII_TXID)) {
netdev_dbg(priv->dev, "PCS RGMII support enabled\n");
priv->hw->pcs = STMMAC_PCS_RGMII;
} else if (interface == PHY_INTERFACE_MODE_SGMII) {
netdev_dbg(priv->dev, "PCS SGMII support enabled\n");
priv->hw->pcs = STMMAC_PCS_SGMII;
}
}
}
/**
* stmmac_init_phy - PHY initialization
* @dev: net device structure
* Description: it initializes the driver's PHY state, and attaches the PHY
* to the mac driver.
* Return value:
* 0 on success
*/
static int stmmac_init_phy(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
struct device_node *node;
int ret;
node = priv->plat->phylink_node;
if (node)
ret = phylink_of_phy_connect(priv->phylink, node, 0);
/* Some DT bindings do not set-up the PHY handle. Let's try to
* manually parse it
*/
if (!node || ret) {
int addr = priv->plat->phy_addr;
struct phy_device *phydev;
phydev = mdiobus_get_phy(priv->mii, addr);
if (!phydev) {
netdev_err(priv->dev, "no phy at addr %d\n", addr);
return -ENODEV;
}
ret = phylink_connect_phy(priv->phylink, phydev);
}
return ret;
}
static int stmmac_phy_setup(struct stmmac_priv *priv)
{
struct fwnode_handle *fwnode = of_fwnode_handle(priv->plat->phylink_node);
int mode = priv->plat->phy_interface;
struct phylink *phylink;
priv->phylink_config.dev = &priv->dev->dev;
priv->phylink_config.type = PHYLINK_NETDEV;
phylink = phylink_create(&priv->phylink_config, fwnode,
mode, &stmmac_phylink_mac_ops);
if (IS_ERR(phylink))
return PTR_ERR(phylink);
priv->phylink = phylink;
return 0;
}
static void stmmac_display_rx_rings(struct stmmac_priv *priv)
{
u32 rx_cnt = priv->plat->rx_queues_to_use;
void *head_rx;
u32 queue;
/* Display RX rings */
for (queue = 0; queue < rx_cnt; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
pr_info("\tRX Queue %u rings\n", queue);
if (priv->extend_desc)
head_rx = (void *)rx_q->dma_erx;
else
head_rx = (void *)rx_q->dma_rx;
/* Display RX ring */
stmmac_display_ring(priv, head_rx, DMA_RX_SIZE, true);
}
}
static void stmmac_display_tx_rings(struct stmmac_priv *priv)
{
u32 tx_cnt = priv->plat->tx_queues_to_use;
void *head_tx;
u32 queue;
/* Display TX rings */
for (queue = 0; queue < tx_cnt; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
pr_info("\tTX Queue %d rings\n", queue);
if (priv->extend_desc)
head_tx = (void *)tx_q->dma_etx;
else if (tx_q->tbs & STMMAC_TBS_AVAIL)
head_tx = (void *)tx_q->dma_entx;
else
head_tx = (void *)tx_q->dma_tx;
stmmac_display_ring(priv, head_tx, DMA_TX_SIZE, false);
}
}
static void stmmac_display_rings(struct stmmac_priv *priv)
{
/* Display RX ring */
stmmac_display_rx_rings(priv);
/* Display TX ring */
stmmac_display_tx_rings(priv);
}
static int stmmac_set_bfsize(int mtu, int bufsize)
{
int ret = bufsize;
if (mtu >= BUF_SIZE_8KiB)
ret = BUF_SIZE_16KiB;
else if (mtu >= BUF_SIZE_4KiB)
ret = BUF_SIZE_8KiB;
else if (mtu >= BUF_SIZE_2KiB)
ret = BUF_SIZE_4KiB;
else if (mtu > DEFAULT_BUFSIZE)
ret = BUF_SIZE_2KiB;
else
ret = DEFAULT_BUFSIZE;
return ret;
}
/**
* stmmac_clear_rx_descriptors - clear RX descriptors
* @priv: driver private structure
* @queue: RX queue index
* Description: this function is called to clear the RX descriptors
* in case of both basic and extended descriptors are used.
*/
static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
int i;
/* Clear the RX descriptors */
for (i = 0; i < DMA_RX_SIZE; i++)
if (priv->extend_desc)
stmmac_init_rx_desc(priv, &rx_q->dma_erx[i].basic,
priv->use_riwt, priv->mode,
(i == DMA_RX_SIZE - 1),
priv->dma_buf_sz);
else
stmmac_init_rx_desc(priv, &rx_q->dma_rx[i],
priv->use_riwt, priv->mode,
(i == DMA_RX_SIZE - 1),
priv->dma_buf_sz);
}
/**
* stmmac_clear_tx_descriptors - clear tx descriptors
* @priv: driver private structure
* @queue: TX queue index.
* Description: this function is called to clear the TX descriptors
* in case of both basic and extended descriptors are used.
*/
static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
int i;
/* Clear the TX descriptors */
for (i = 0; i < DMA_TX_SIZE; i++) {
int last = (i == (DMA_TX_SIZE - 1));
struct dma_desc *p;
if (priv->extend_desc)
p = &tx_q->dma_etx[i].basic;
else if (tx_q->tbs & STMMAC_TBS_AVAIL)
p = &tx_q->dma_entx[i].basic;
else
p = &tx_q->dma_tx[i];
stmmac_init_tx_desc(priv, p, priv->mode, last);
}
}
/**
* stmmac_clear_descriptors - clear descriptors
* @priv: driver private structure
* Description: this function is called to clear the TX and RX descriptors
* in case of both basic and extended descriptors are used.
*/
static void stmmac_clear_descriptors(struct stmmac_priv *priv)
{
u32 rx_queue_cnt = priv->plat->rx_queues_to_use;
u32 tx_queue_cnt = priv->plat->tx_queues_to_use;
u32 queue;
/* Clear the RX descriptors */
for (queue = 0; queue < rx_queue_cnt; queue++)
stmmac_clear_rx_descriptors(priv, queue);
/* Clear the TX descriptors */
for (queue = 0; queue < tx_queue_cnt; queue++)
stmmac_clear_tx_descriptors(priv, queue);
}
/**
* stmmac_init_rx_buffers - init the RX descriptor buffer.
* @priv: driver private structure
* @p: descriptor pointer
* @i: descriptor index
* @flags: gfp flag
* @queue: RX queue index
* Description: this function is called to allocate a receive buffer, perform
* the DMA mapping and init the descriptor.
*/
static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
int i, gfp_t flags, u32 queue)
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i];
buf->page = page_pool_dev_alloc_pages(rx_q->page_pool);
if (!buf->page)
return -ENOMEM;
if (priv->sph) {
buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool);
if (!buf->sec_page)
return -ENOMEM;
buf->sec_addr = page_pool_get_dma_addr(buf->sec_page);
stmmac_set_desc_sec_addr(priv, p, buf->sec_addr);
} else {
buf->sec_page = NULL;
}
buf->addr = page_pool_get_dma_addr(buf->page);
stmmac_set_desc_addr(priv, p, buf->addr);
if (priv->dma_buf_sz == BUF_SIZE_16KiB)
stmmac_init_desc3(priv, p);
return 0;
}
/**
* stmmac_free_rx_buffer - free RX dma buffers
* @priv: private structure
* @queue: RX queue index
* @i: buffer index.
*/
static void stmmac_free_rx_buffer(struct stmmac_priv *priv, u32 queue, int i)
{
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i];
if (buf->page)
page_pool_put_page(rx_q->page_pool, buf->page, false);
buf->page = NULL;
if (buf->sec_page)
page_pool_put_page(rx_q->page_pool, buf->sec_page, false);
buf->sec_page = NULL;
}
/**
* stmmac_free_tx_buffer - free RX dma buffers
* @priv: private structure
* @queue: RX queue index
* @i: buffer index.
*/
static void stmmac_free_tx_buffer(struct stmmac_priv *priv, u32 queue, int i)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
if (tx_q->tx_skbuff_dma[i].buf) {
if (tx_q->tx_skbuff_dma[i].map_as_page)
dma_unmap_page(priv->device,
tx_q->tx_skbuff_dma[i].buf,
tx_q->tx_skbuff_dma[i].len,
DMA_TO_DEVICE);
else
dma_unmap_single(priv->device,
tx_q->tx_skbuff_dma[i].buf,
tx_q->tx_skbuff_dma[i].len,
DMA_TO_DEVICE);
}
if (tx_q->tx_skbuff[i]) {
dev_kfree_skb_any(tx_q->tx_skbuff[i]);
tx_q->tx_skbuff[i] = NULL;
tx_q->tx_skbuff_dma[i].buf = 0;
tx_q->tx_skbuff_dma[i].map_as_page = false;
}
}
/**
* init_dma_rx_desc_rings - init the RX descriptor rings
* @dev: net device structure
* @flags: gfp flag.
* Description: this function initializes the DMA RX descriptors
* and allocates the socket buffers. It supports the chained and ring
* modes.
*/
static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 rx_count = priv->plat->rx_queues_to_use;
int ret = -ENOMEM;
int queue;
int i;
/* RX INITIALIZATION */
netif_dbg(priv, probe, priv->dev,
"SKB addresses:\nskb\t\tskb data\tdma data\n");
for (queue = 0; queue < rx_count; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
netif_dbg(priv, probe, priv->dev,
"(%s) dma_rx_phy=0x%08x\n", __func__,
(u32)rx_q->dma_rx_phy);
stmmac_clear_rx_descriptors(priv, queue);
for (i = 0; i < DMA_RX_SIZE; i++) {
struct dma_desc *p;
if (priv->extend_desc)
p = &((rx_q->dma_erx + i)->basic);
else
p = rx_q->dma_rx + i;
ret = stmmac_init_rx_buffers(priv, p, i, flags,
queue);
if (ret)
goto err_init_rx_buffers;
}
rx_q->cur_rx = 0;
rx_q->dirty_rx = (unsigned int)(i - DMA_RX_SIZE);
/* Setup the chained descriptor addresses */
if (priv->mode == STMMAC_CHAIN_MODE) {
if (priv->extend_desc)
stmmac_mode_init(priv, rx_q->dma_erx,
rx_q->dma_rx_phy, DMA_RX_SIZE, 1);
else
stmmac_mode_init(priv, rx_q->dma_rx,
rx_q->dma_rx_phy, DMA_RX_SIZE, 0);
}
}
return 0;
err_init_rx_buffers:
while (queue >= 0) {
while (--i >= 0)
stmmac_free_rx_buffer(priv, queue, i);
if (queue == 0)
break;
i = DMA_RX_SIZE;
queue--;
}
return ret;
}
/**
* init_dma_tx_desc_rings - init the TX descriptor rings
* @dev: net device structure.
* Description: this function initializes the DMA TX descriptors
* and allocates the socket buffers. It supports the chained and ring
* modes.
*/
static int init_dma_tx_desc_rings(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 tx_queue_cnt = priv->plat->tx_queues_to_use;
u32 queue;
int i;
for (queue = 0; queue < tx_queue_cnt; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
netif_dbg(priv, probe, priv->dev,
"(%s) dma_tx_phy=0x%08x\n", __func__,
(u32)tx_q->dma_tx_phy);
/* Setup the chained descriptor addresses */
if (priv->mode == STMMAC_CHAIN_MODE) {
if (priv->extend_desc)
stmmac_mode_init(priv, tx_q->dma_etx,
tx_q->dma_tx_phy, DMA_TX_SIZE, 1);
else if (!(tx_q->tbs & STMMAC_TBS_AVAIL))
stmmac_mode_init(priv, tx_q->dma_tx,
tx_q->dma_tx_phy, DMA_TX_SIZE, 0);
}
for (i = 0; i < DMA_TX_SIZE; i++) {
struct dma_desc *p;
if (priv->extend_desc)
p = &((tx_q->dma_etx + i)->basic);
else if (tx_q->tbs & STMMAC_TBS_AVAIL)
p = &((tx_q->dma_entx + i)->basic);
else
p = tx_q->dma_tx + i;
stmmac_clear_desc(priv, p);
tx_q->tx_skbuff_dma[i].buf = 0;
tx_q->tx_skbuff_dma[i].map_as_page = false;
tx_q->tx_skbuff_dma[i].len = 0;
tx_q->tx_skbuff_dma[i].last_segment = false;
tx_q->tx_skbuff[i] = NULL;
}
tx_q->dirty_tx = 0;
tx_q->cur_tx = 0;
tx_q->mss = 0;
netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue));
}
return 0;
}
/**
* init_dma_desc_rings - init the RX/TX descriptor rings
* @dev: net device structure
* @flags: gfp flag.
* Description: this function initializes the DMA RX/TX descriptors
* and allocates the socket buffers. It supports the chained and ring
* modes.
*/
static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
{
struct stmmac_priv *priv = netdev_priv(dev);
int ret;
ret = init_dma_rx_desc_rings(dev, flags);
if (ret)
return ret;
ret = init_dma_tx_desc_rings(dev);
stmmac_clear_descriptors(priv);
if (netif_msg_hw(priv))
stmmac_display_rings(priv);
return ret;
}
/**
* dma_free_rx_skbufs - free RX dma buffers
* @priv: private structure
* @queue: RX queue index
*/
static void dma_free_rx_skbufs(struct stmmac_priv *priv, u32 queue)
{
int i;
for (i = 0; i < DMA_RX_SIZE; i++)
stmmac_free_rx_buffer(priv, queue, i);
}
/**
* dma_free_tx_skbufs - free TX dma buffers
* @priv: private structure
* @queue: TX queue index
*/
static void dma_free_tx_skbufs(struct stmmac_priv *priv, u32 queue)
{
int i;
for (i = 0; i < DMA_TX_SIZE; i++)
stmmac_free_tx_buffer(priv, queue, i);
}
/**
* free_dma_rx_desc_resources - free RX dma desc resources
* @priv: private structure
*/
static void free_dma_rx_desc_resources(struct stmmac_priv *priv)
{
u32 rx_count = priv->plat->rx_queues_to_use;
u32 queue;
/* Free RX queue resources */
for (queue = 0; queue < rx_count; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
/* Release the DMA RX socket buffers */
dma_free_rx_skbufs(priv, queue);
/* Free DMA regions of consistent memory previously allocated */
if (!priv->extend_desc)
dma_free_coherent(priv->device,
DMA_RX_SIZE * sizeof(struct dma_desc),
rx_q->dma_rx, rx_q->dma_rx_phy);
else
dma_free_coherent(priv->device, DMA_RX_SIZE *
sizeof(struct dma_extended_desc),
rx_q->dma_erx, rx_q->dma_rx_phy);
kfree(rx_q->buf_pool);
if (rx_q->page_pool)
page_pool_destroy(rx_q->page_pool);
}
}
/**
* free_dma_tx_desc_resources - free TX dma desc resources
* @priv: private structure
*/
static void free_dma_tx_desc_resources(struct stmmac_priv *priv)
{
u32 tx_count = priv->plat->tx_queues_to_use;
u32 queue;
/* Free TX queue resources */
for (queue = 0; queue < tx_count; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
size_t size;
void *addr;
/* Release the DMA TX socket buffers */
dma_free_tx_skbufs(priv, queue);
if (priv->extend_desc) {
size = sizeof(struct dma_extended_desc);
addr = tx_q->dma_etx;
} else if (tx_q->tbs & STMMAC_TBS_AVAIL) {
size = sizeof(struct dma_edesc);
addr = tx_q->dma_entx;
} else {
size = sizeof(struct dma_desc);
addr = tx_q->dma_tx;
}
size *= DMA_TX_SIZE;
dma_free_coherent(priv->device, size, addr, tx_q->dma_tx_phy);
kfree(tx_q->tx_skbuff_dma);
kfree(tx_q->tx_skbuff);
}
}
/**
* alloc_dma_rx_desc_resources - alloc RX resources.
* @priv: private structure
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
*/
static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv)
{
u32 rx_count = priv->plat->rx_queues_to_use;
int ret = -ENOMEM;
u32 queue;
/* RX queues buffers and DMA */
for (queue = 0; queue < rx_count; queue++) {
struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
struct page_pool_params pp_params = { 0 };
unsigned int num_pages;
rx_q->queue_index = queue;
rx_q->priv_data = priv;
pp_params.flags = PP_FLAG_DMA_MAP;
pp_params.pool_size = DMA_RX_SIZE;
num_pages = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE);
pp_params.order = ilog2(num_pages);
pp_params.nid = dev_to_node(priv->device);
pp_params.dev = priv->device;
pp_params.dma_dir = DMA_FROM_DEVICE;
rx_q->page_pool = page_pool_create(&pp_params);
if (IS_ERR(rx_q->page_pool)) {
ret = PTR_ERR(rx_q->page_pool);
rx_q->page_pool = NULL;
goto err_dma;
}
rx_q->buf_pool = kcalloc(DMA_RX_SIZE, sizeof(*rx_q->buf_pool),
GFP_KERNEL);
if (!rx_q->buf_pool)
goto err_dma;
if (priv->extend_desc) {
rx_q->dma_erx = dma_alloc_coherent(priv->device,
DMA_RX_SIZE * sizeof(struct dma_extended_desc),
&rx_q->dma_rx_phy,
GFP_KERNEL);
if (!rx_q->dma_erx)
goto err_dma;
} else {
rx_q->dma_rx = dma_alloc_coherent(priv->device,
DMA_RX_SIZE * sizeof(struct dma_desc),
&rx_q->dma_rx_phy,
GFP_KERNEL);
if (!rx_q->dma_rx)
goto err_dma;
}
}
return 0;
err_dma:
free_dma_rx_desc_resources(priv);
return ret;
}
/**
* alloc_dma_tx_desc_resources - alloc TX resources.
* @priv: private structure
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
*/
static int alloc_dma_tx_desc_resources(struct stmmac_priv *priv)
{
u32 tx_count = priv->plat->tx_queues_to_use;
int ret = -ENOMEM;
u32 queue;
/* TX queues buffers and DMA */
for (queue = 0; queue < tx_count; queue++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
size_t size;
void *addr;
tx_q->queue_index = queue;
tx_q->priv_data = priv;
tx_q->tx_skbuff_dma = kcalloc(DMA_TX_SIZE,
sizeof(*tx_q->tx_skbuff_dma),
GFP_KERNEL);
if (!tx_q->tx_skbuff_dma)
goto err_dma;
tx_q->tx_skbuff = kcalloc(DMA_TX_SIZE,
sizeof(struct sk_buff *),
GFP_KERNEL);
if (!tx_q->tx_skbuff)
goto err_dma;
if (priv->extend_desc)
size = sizeof(struct dma_extended_desc);
else if (tx_q->tbs & STMMAC_TBS_AVAIL)
size = sizeof(struct dma_edesc);
else
size = sizeof(struct dma_desc);
size *= DMA_TX_SIZE;
addr = dma_alloc_coherent(priv->device, size,
&tx_q->dma_tx_phy, GFP_KERNEL);
if (!addr)
goto err_dma;
if (priv->extend_desc)
tx_q->dma_etx = addr;
else if (tx_q->tbs & STMMAC_TBS_AVAIL)
tx_q->dma_entx = addr;
else
tx_q->dma_tx = addr;
}
return 0;
err_dma:
free_dma_tx_desc_resources(priv);
return ret;
}
/**
* alloc_dma_desc_resources - alloc TX/RX resources.
* @priv: private structure
* Description: according to which descriptor can be used (extend or basic)
* this function allocates the resources for TX and RX paths. In case of
* reception, for example, it pre-allocated the RX socket buffer in order to
* allow zero-copy mechanism.
*/
static int alloc_dma_desc_resources(struct stmmac_priv *priv)
{
/* RX Allocation */
int ret = alloc_dma_rx_desc_resources(priv);
if (ret)
return ret;
ret = alloc_dma_tx_desc_resources(priv);
return ret;
}
/**
* free_dma_desc_resources - free dma desc resources
* @priv: private structure
*/
static void free_dma_desc_resources(struct stmmac_priv *priv)
{
/* Release the DMA RX socket buffers */
free_dma_rx_desc_resources(priv);
/* Release the DMA TX socket buffers */
free_dma_tx_desc_resources(priv);
}
/**
* stmmac_mac_enable_rx_queues - Enable MAC rx queues
* @priv: driver private structure
* Description: It is used for enabling the rx queues in the MAC
*/
static void stmmac_mac_enable_rx_queues(struct stmmac_priv *priv)
{
u32 rx_queues_count = priv->plat->rx_queues_to_use;
int queue;
u8 mode;
for (queue = 0; queue < rx_queues_count; queue++) {
mode = priv->plat->rx_queues_cfg[queue].mode_to_use;
stmmac_rx_queue_enable(priv, priv->hw, mode, queue);
}
}
/**
* stmmac_start_rx_dma - start RX DMA channel
* @priv: driver private structure
* @chan: RX channel index
* Description:
* This starts a RX DMA channel
*/
static void stmmac_start_rx_dma(struct stmmac_priv *priv, u32 chan)
{
netdev_dbg(priv->dev, "DMA RX processes started in channel %d\n", chan);
stmmac_start_rx(priv, priv->ioaddr, chan);
}
/**
* stmmac_start_tx_dma - start TX DMA channel
* @priv: driver private structure
* @chan: TX channel index
* Description:
* This starts a TX DMA channel
*/
static void stmmac_start_tx_dma(struct stmmac_priv *priv, u32 chan)
{
netdev_dbg(priv->dev, "DMA TX processes started in channel %d\n", chan);
stmmac_start_tx(priv, priv->ioaddr, chan);
}
/**
* stmmac_stop_rx_dma - stop RX DMA channel
* @priv: driver private structure
* @chan: RX channel index
* Description:
* This stops a RX DMA channel
*/
static void stmmac_stop_rx_dma(struct stmmac_priv *priv, u32 chan)
{
netdev_dbg(priv->dev, "DMA RX processes stopped in channel %d\n", chan);
stmmac_stop_rx(priv, priv->ioaddr, chan);
}
/**
* stmmac_stop_tx_dma - stop TX DMA channel
* @priv: driver private structure
* @chan: TX channel index
* Description:
* This stops a TX DMA channel
*/
static void stmmac_stop_tx_dma(struct stmmac_priv *priv, u32 chan)
{
netdev_dbg(priv->dev, "DMA TX processes stopped in channel %d\n", chan);
stmmac_stop_tx(priv, priv->ioaddr, chan);
}
/**
* stmmac_start_all_dma - start all RX and TX DMA channels
* @priv: driver private structure
* Description:
* This starts all the RX and TX DMA channels
*/
static void stmmac_start_all_dma(struct stmmac_priv *priv)
{
u32 rx_channels_count = priv->plat->rx_queues_to_use;
u32 tx_channels_count = priv->plat->tx_queues_to_use;
u32 chan = 0;
for (chan = 0; chan < rx_channels_count; chan++)
stmmac_start_rx_dma(priv, chan);
for (chan = 0; chan < tx_channels_count; chan++)
stmmac_start_tx_dma(priv, chan);
}
/**
* stmmac_stop_all_dma - stop all RX and TX DMA channels
* @priv: driver private structure
* Description:
* This stops the RX and TX DMA channels
*/
static void stmmac_stop_all_dma(struct stmmac_priv *priv)
{
u32 rx_channels_count = priv->plat->rx_queues_to_use;
u32 tx_channels_count = priv->plat->tx_queues_to_use;
u32 chan = 0;
for (chan = 0; chan < rx_channels_count; chan++)
stmmac_stop_rx_dma(priv, chan);
for (chan = 0; chan < tx_channels_count; chan++)
stmmac_stop_tx_dma(priv, chan);
}
/**
* stmmac_dma_operation_mode - HW DMA operation mode
* @priv: driver private structure
* Description: it is used for configuring the DMA operation mode register in
* order to program the tx/rx DMA thresholds or Store-And-Forward mode.
*/
static void stmmac_dma_operation_mode(struct stmmac_priv *priv)
{
u32 rx_channels_count = priv->plat->rx_queues_to_use;
u32 tx_channels_count = priv->plat->tx_queues_to_use;
int rxfifosz = priv->plat->rx_fifo_size;
int txfifosz = priv->plat->tx_fifo_size;
u32 txmode = 0;
u32 rxmode = 0;
u32 chan = 0;
u8 qmode = 0;
if (rxfifosz == 0)
rxfifosz = priv->dma_cap.rx_fifo_size;
if (txfifosz == 0)
txfifosz = priv->dma_cap.tx_fifo_size;
/* Adjust for real per queue fifo size */
rxfifosz /= rx_channels_count;
txfifosz /= tx_channels_count;
if (priv->plat->force_thresh_dma_mode) {
txmode = tc;
rxmode = tc;
} else if (priv->plat->force_sf_dma_mode || priv->plat->tx_coe) {
/*
* In case of GMAC, SF mode can be enabled
* to perform the TX COE in HW. This depends on:
* 1) TX COE if actually supported
* 2) There is no bugged Jumbo frame support
* that needs to not insert csum in the TDES.
*/
txmode = SF_DMA_MODE;
rxmode = SF_DMA_MODE;
priv->xstats.threshold = SF_DMA_MODE;
} else {
txmode = tc;
rxmode = SF_DMA_MODE;
}
/* configure all channels */
for (chan = 0; chan < rx_channels_count; chan++) {
qmode = priv->plat->rx_queues_cfg[chan].mode_to_use;
stmmac_dma_rx_mode(priv, priv->ioaddr, rxmode, chan,
rxfifosz, qmode);
stmmac_set_dma_bfsize(priv, priv->ioaddr, priv->dma_buf_sz,
chan);
}
for (chan = 0; chan < tx_channels_count; chan++) {
qmode = priv->plat->tx_queues_cfg[chan].mode_to_use;
stmmac_dma_tx_mode(priv, priv->ioaddr, txmode, chan,
txfifosz, qmode);
}
}
/**
* stmmac_tx_clean - to manage the transmission completion
* @priv: driver private structure
* @queue: TX queue index
* Description: it reclaims the transmit resources after transmission completes.
*/
static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
unsigned int bytes_compl = 0, pkts_compl = 0;
unsigned int entry, count = 0;
__netif_tx_lock_bh(netdev_get_tx_queue(priv->dev, queue));
priv->xstats.tx_clean++;
entry = tx_q->dirty_tx;
while ((entry != tx_q->cur_tx) && (count < budget)) {
struct sk_buff *skb = tx_q->tx_skbuff[entry];
struct dma_desc *p;
int status;
if (priv->extend_desc)
p = (struct dma_desc *)(tx_q->dma_etx + entry);
else if (tx_q->tbs & STMMAC_TBS_AVAIL)
p = &tx_q->dma_entx[entry].basic;
else
p = tx_q->dma_tx + entry;
status = stmmac_tx_status(priv, &priv->dev->stats,
&priv->xstats, p, priv->ioaddr);
/* Check if the descriptor is owned by the DMA */
if (unlikely(status & tx_dma_own))
break;
count++;
/* Make sure descriptor fields are read after reading
* the own bit.
*/
dma_rmb();
/* Just consider the last segment and ...*/
if (likely(!(status & tx_not_ls))) {
/* ... verify the status error condition */
if (unlikely(status & tx_err)) {
priv->dev->stats.tx_errors++;
} else {
priv->dev->stats.tx_packets++;
priv->xstats.tx_pkt_n++;
}
stmmac_get_tx_hwtstamp(priv, p, skb);
}
if (likely(tx_q->tx_skbuff_dma[entry].buf)) {
if (tx_q->tx_skbuff_dma[entry].map_as_page)
dma_unmap_page(priv->device,
tx_q->tx_skbuff_dma[entry].buf,
tx_q->tx_skbuff_dma[entry].len,
DMA_TO_DEVICE);
else
dma_unmap_single(priv->device,
tx_q->tx_skbuff_dma[entry].buf,
tx_q->tx_skbuff_dma[entry].len,
DMA_TO_DEVICE);
tx_q->tx_skbuff_dma[entry].buf = 0;
tx_q->tx_skbuff_dma[entry].len = 0;
tx_q->tx_skbuff_dma[entry].map_as_page = false;
}
stmmac_clean_desc3(priv, tx_q, p);
tx_q->tx_skbuff_dma[entry].last_segment = false;
tx_q->tx_skbuff_dma[entry].is_jumbo = false;
if (likely(skb != NULL)) {
pkts_compl++;
bytes_compl += skb->len;
dev_consume_skb_any(skb);
tx_q->tx_skbuff[entry] = NULL;
}
stmmac_release_tx_desc(priv, p, priv->mode);
entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
}
tx_q->dirty_tx = entry;
netdev_tx_completed_queue(netdev_get_tx_queue(priv->dev, queue),
pkts_compl, bytes_compl);
if (unlikely(netif_tx_queue_stopped(netdev_get_tx_queue(priv->dev,
queue))) &&
stmmac_tx_avail(priv, queue) > STMMAC_TX_THRESH) {
netif_dbg(priv, tx_done, priv->dev,
"%s: restart transmit\n", __func__);
netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue));
}
if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) {
stmmac_enable_eee_mode(priv);
mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer));
}
/* We still have pending packets, let's call for a new scheduling */
if (tx_q->dirty_tx != tx_q->cur_tx)
mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer));
__netif_tx_unlock_bh(netdev_get_tx_queue(priv->dev, queue));
return count;
}
/**
* stmmac_tx_err - to manage the tx error
* @priv: driver private structure
* @chan: channel index
* Description: it cleans the descriptors and restarts the transmission
* in case of transmission errors.
*/
static void stmmac_tx_err(struct stmmac_priv *priv, u32 chan)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan];
netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, chan));
stmmac_stop_tx_dma(priv, chan);
dma_free_tx_skbufs(priv, chan);
stmmac_clear_tx_descriptors(priv, chan);
tx_q->dirty_tx = 0;
tx_q->cur_tx = 0;
tx_q->mss = 0;
netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, chan));
stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg,
tx_q->dma_tx_phy, chan);
stmmac_start_tx_dma(priv, chan);
priv->dev->stats.tx_errors++;
netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, chan));
}
/**
* stmmac_set_dma_operation_mode - Set DMA operation mode by channel
* @priv: driver private structure
* @txmode: TX operating mode
* @rxmode: RX operating mode
* @chan: channel index
* Description: it is used for configuring of the DMA operation mode in
* runtime in order to program the tx/rx DMA thresholds or Store-And-Forward
* mode.
*/
static void stmmac_set_dma_operation_mode(struct stmmac_priv *priv, u32 txmode,
u32 rxmode, u32 chan)
{
u8 rxqmode = priv->plat->rx_queues_cfg[chan].mode_to_use;
u8 txqmode = priv->plat->tx_queues_cfg[chan].mode_to_use;
u32 rx_channels_count = priv->plat->rx_queues_to_use;
u32 tx_channels_count = priv->plat->tx_queues_to_use;
int rxfifosz = priv->plat->rx_fifo_size;
int txfifosz = priv->plat->tx_fifo_size;
if (rxfifosz == 0)
rxfifosz = priv->dma_cap.rx_fifo_size;
if (txfifosz == 0)
txfifosz = priv->dma_cap.tx_fifo_size;
/* Adjust for real per queue fifo size */
rxfifosz /= rx_channels_count;
txfifosz /= tx_channels_count;
stmmac_dma_rx_mode(priv, priv->ioaddr, rxmode, chan, rxfifosz, rxqmode);
stmmac_dma_tx_mode(priv, priv->ioaddr, txmode, chan, txfifosz, txqmode);
}
static bool stmmac_safety_feat_interrupt(struct stmmac_priv *priv)
{
int ret;
ret = stmmac_safety_feat_irq_status(priv, priv->dev,
priv->ioaddr, priv->dma_cap.asp, &priv->sstats);
if (ret && (ret != -EINVAL)) {
stmmac_global_err(priv);
return true;
}
return false;
}
static int stmmac_napi_check(struct stmmac_priv *priv, u32 chan)
{
int status = stmmac_dma_interrupt_status(priv, priv->ioaddr,
&priv->xstats, chan);
struct stmmac_channel *ch = &priv->channel[chan];
unsigned long flags;
if ((status & handle_rx) && (chan < priv->plat->rx_queues_to_use)) {
if (napi_schedule_prep(&ch->rx_napi)) {
spin_lock_irqsave(&ch->lock, flags);
stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 0);
spin_unlock_irqrestore(&ch->lock, flags);
__napi_schedule_irqoff(&ch->rx_napi);
}
}
if ((status & handle_tx) && (chan < priv->plat->tx_queues_to_use)) {
if (napi_schedule_prep(&ch->tx_napi)) {
spin_lock_irqsave(&ch->lock, flags);
stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 0, 1);
spin_unlock_irqrestore(&ch->lock, flags);
__napi_schedule_irqoff(&ch->tx_napi);
}
}
return status;
}
/**
* stmmac_dma_interrupt - DMA ISR
* @priv: driver private structure
* Description: this is the DMA ISR. It is called by the main ISR.
* It calls the dwmac dma routine and schedule poll method in case of some
* work can be done.
*/
static void stmmac_dma_interrupt(struct stmmac_priv *priv)
{
u32 tx_channel_count = priv->plat->tx_queues_to_use;
u32 rx_channel_count = priv->plat->rx_queues_to_use;
u32 channels_to_check = tx_channel_count > rx_channel_count ?
tx_channel_count : rx_channel_count;
u32 chan;
int status[max_t(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)];
/* Make sure we never check beyond our status buffer. */
if (WARN_ON_ONCE(channels_to_check > ARRAY_SIZE(status)))
channels_to_check = ARRAY_SIZE(status);
for (chan = 0; chan < channels_to_check; chan++)
status[chan] = stmmac_napi_check(priv, chan);
for (chan = 0; chan < tx_channel_count; chan++) {
if (unlikely(status[chan] & tx_hard_error_bump_tc)) {
/* Try to bump up the dma threshold on this failure */
if (unlikely(priv->xstats.threshold != SF_DMA_MODE) &&
(tc <= 256)) {
tc += 64;
if (priv->plat->force_thresh_dma_mode)
stmmac_set_dma_operation_mode(priv,
tc,
tc,
chan);
else
stmmac_set_dma_operation_mode(priv,
tc,
SF_DMA_MODE,
chan);
priv->xstats.threshold = tc;
}
} else if (unlikely(status[chan] == tx_hard_error)) {
stmmac_tx_err(priv, chan);
}
}
}
/**
* stmmac_mmc_setup: setup the Mac Management Counters (MMC)
* @priv: driver private structure
* Description: this masks the MMC irq, in fact, the counters are managed in SW.
*/
static void stmmac_mmc_setup(struct stmmac_priv *priv)
{
unsigned int mode = MMC_CNTRL_RESET_ON_READ | MMC_CNTRL_COUNTER_RESET |
MMC_CNTRL_PRESET | MMC_CNTRL_FULL_HALF_PRESET;
stmmac_mmc_intr_all_mask(priv, priv->mmcaddr);
if (priv->dma_cap.rmon) {
stmmac_mmc_ctrl(priv, priv->mmcaddr, mode);
memset(&priv->mmc, 0, sizeof(struct stmmac_counters));
} else
netdev_info(priv->dev, "No MAC Management Counters available\n");
}
/**
* stmmac_get_hw_features - get MAC capabilities from the HW cap. register.
* @priv: driver private structure
* Description:
* new GMAC chip generations have a new register to indicate the
* presence of the optional feature/functions.
* This can be also used to override the value passed through the
* platform and necessary for old MAC10/100 and GMAC chips.
*/
static int stmmac_get_hw_features(struct stmmac_priv *priv)
{
return stmmac_get_hw_feature(priv, priv->ioaddr, &priv->dma_cap) == 0;
}
/**
* stmmac_check_ether_addr - check if the MAC addr is valid
* @priv: driver private structure
* Description:
* it is to verify if the MAC address is valid, in case of failures it
* generates a random MAC address
*/
static void stmmac_check_ether_addr(struct stmmac_priv *priv)
{
if (!is_valid_ether_addr(priv->dev->dev_addr)) {
stmmac_get_umac_addr(priv, priv->hw, priv->dev->dev_addr, 0);
if (!is_valid_ether_addr(priv->dev->dev_addr))
eth_hw_addr_random(priv->dev);
dev_info(priv->device, "device MAC address %pM\n",
priv->dev->dev_addr);
}
}
/**
* stmmac_init_dma_engine - DMA init.
* @priv: driver private structure
* Description:
* It inits the DMA invoking the specific MAC/GMAC callback.
* Some DMA parameters can be passed from the platform;
* in case of these are not passed a default is kept for the MAC or GMAC.
*/
static int stmmac_init_dma_engine(struct stmmac_priv *priv)
{
u32 rx_channels_count = priv->plat->rx_queues_to_use;
u32 tx_channels_count = priv->plat->tx_queues_to_use;
u32 dma_csr_ch = max(rx_channels_count, tx_channels_count);
struct stmmac_rx_queue *rx_q;
struct stmmac_tx_queue *tx_q;
u32 chan = 0;
int atds = 0;
int ret = 0;
if (!priv->plat->dma_cfg || !priv->plat->dma_cfg->pbl) {
dev_err(priv->device, "Invalid DMA configuration\n");
return -EINVAL;
}
if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE))
atds = 1;
ret = stmmac_reset(priv, priv->ioaddr);
if (ret) {
dev_err(priv->device, "Failed to reset the dma\n");
return ret;
}
/* DMA Configuration */
stmmac_dma_init(priv, priv->ioaddr, priv->plat->dma_cfg, atds);
if (priv->plat->axi)
stmmac_axi(priv, priv->ioaddr, priv->plat->axi);
/* DMA CSR Channel configuration */
for (chan = 0; chan < dma_csr_ch; chan++)
stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan);
/* DMA RX Channel Configuration */
for (chan = 0; chan < rx_channels_count; chan++) {
rx_q = &priv->rx_queue[chan];
stmmac_init_rx_chan(priv, priv->ioaddr, priv->plat->dma_cfg,
rx_q->dma_rx_phy, chan);
rx_q->rx_tail_addr = rx_q->dma_rx_phy +
(DMA_RX_SIZE * sizeof(struct dma_desc));
stmmac_set_rx_tail_ptr(priv, priv->ioaddr,
rx_q->rx_tail_addr, chan);
}
/* DMA TX Channel Configuration */
for (chan = 0; chan < tx_channels_count; chan++) {
tx_q = &priv->tx_queue[chan];
stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg,
tx_q->dma_tx_phy, chan);
tx_q->tx_tail_addr = tx_q->dma_tx_phy;
stmmac_set_tx_tail_ptr(priv, priv->ioaddr,
tx_q->tx_tail_addr, chan);
}
return ret;
}
static void stmmac_tx_timer_arm(struct stmmac_priv *priv, u32 queue)
{
struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer));
}
/**
* stmmac_tx_timer - mitigation sw timer for tx.
* @data: data pointer
* Description:
* This is the timer handler to directly invoke the stmmac_tx_clean.
*/
static void stmmac_tx_timer(struct timer_list *t)
{
struct stmmac_tx_queue *tx_q = from_timer(tx_q, t, txtimer);
struct stmmac_priv *priv = tx_q->priv_data;
struct stmmac_channel *ch;
ch = &priv->channel[tx_q->queue_index];
if (likely(napi_schedule_prep(&ch->tx_napi))) {
unsigned long flags;
spin_lock_irqsave(&ch->lock, flags);
stmmac_disable_dma_irq(priv, priv->ioaddr, ch->index, 0, 1);
spin_unlock_irqrestore(&ch->lock, flags);
__napi_schedule(&ch->tx_napi);
}
}
/**
* stmmac_init_coalesce - init mitigation options.
* @priv: driver private structure
* Description:
* This inits the coalesce parameters: i.e. timer rate,
* timer handler and default threshold used for enabling the
* interrupt on completion bit.
*/
static void stmmac_init_coalesce(struct stmmac_priv *priv)
{
u32 tx_channel_count = priv->plat->tx_queues_to_use;
u32 chan;
priv->tx_coal_frames = STMMAC_TX_FRAMES;
priv->tx_coal_timer = STMMAC_COAL_TX_TIMER;
priv->rx_coal_frames = STMMAC_RX_FRAMES;
for (chan = 0; chan < tx_channel_count; chan++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan];
timer_setup(&tx_q->txtimer, stmmac_tx_timer, 0);
}
}
static void stmmac_set_rings_length(struct stmmac_priv *priv)
{
u32 rx_channels_count = priv->plat->rx_queues_to_use;
u32 tx_channels_count = priv->plat->tx_queues_to_use;
u32 chan;
/* set TX ring length */
for (chan = 0; chan < tx_channels_count; chan++)
stmmac_set_tx_ring_len(priv, priv->ioaddr,
(DMA_TX_SIZE - 1), chan);
/* set RX ring length */
for (chan = 0; chan < rx_channels_count; chan++)
stmmac_set_rx_ring_len(priv, priv->ioaddr,
(DMA_RX_SIZE - 1), chan);
}
/**
* stmmac_set_tx_queue_weight - Set TX queue weight
* @priv: driver private structure
* Description: It is used for setting TX queues weight
*/
static void stmmac_set_tx_queue_weight(struct stmmac_priv *priv)
{
u32 tx_queues_count = priv->plat->tx_queues_to_use;
u32 weight;
u32 queue;
for (queue = 0; queue < tx_queues_count; queue++) {
weight = priv->plat->tx_queues_cfg[queue].weight;
stmmac_set_mtl_tx_queue_weight(priv, priv->hw, weight, queue);
}
}
/**
* stmmac_configure_cbs - Configure CBS in TX queue
* @priv: driver private structure
* Description: It is used for configuring CBS in AVB TX queues
*/
static void stmmac_configure_cbs(struct stmmac_priv *priv)
{
u32 tx_queues_count = priv->plat->tx_queues_to_use;
u32 mode_to_use;
u32 queue;
/* queue 0 is reserved for legacy traffic */
for (queue = 1; queue < tx_queues_count; queue++) {
mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
if (mode_to_use == MTL_QUEUE_DCB)
continue;
stmmac_config_cbs(priv, priv->hw,
priv->plat->tx_queues_cfg[queue].send_slope,
priv->plat->tx_queues_cfg[queue].idle_slope,
priv->plat->tx_queues_cfg[queue].high_credit,
priv->plat->tx_queues_cfg[queue].low_credit,
queue);
}
}
/**
* stmmac_rx_queue_dma_chan_map - Map RX queue to RX dma channel
* @priv: driver private structure
* Description: It is used for mapping RX queues to RX dma channels
*/
static void stmmac_rx_queue_dma_chan_map(struct stmmac_priv *priv)
{
u32 rx_queues_count = priv->plat->rx_queues_to_use;
u32 queue;
u32 chan;
for (queue = 0; queue < rx_queues_count; queue++) {
chan = priv->plat->rx_queues_cfg[queue].chan;
stmmac_map_mtl_to_dma(priv, priv->hw, queue, chan);
}
}
/**
* stmmac_mac_config_rx_queues_prio - Configure RX Queue priority
* @priv: driver private structure
* Description: It is used for configuring the RX Queue Priority
*/
static void stmmac_mac_config_rx_queues_prio(struct stmmac_priv *priv)
{
u32 rx_queues_count = priv->plat->rx_queues_to_use;
u32 queue;
u32 prio;
for (queue = 0; queue < rx_queues_count; queue++) {
if (!priv->plat->rx_queues_cfg[queue].use_prio)
continue;
prio = priv->plat->rx_queues_cfg[queue].prio;
stmmac_rx_queue_prio(priv, priv->hw, prio, queue);
}
}
/**
* stmmac_mac_config_tx_queues_prio - Configure TX Queue priority
* @priv: driver private structure
* Description: It is used for configuring the TX Queue Priority
*/
static void stmmac_mac_config_tx_queues_prio(struct stmmac_priv *priv)
{
u32 tx_queues_count = priv->plat->tx_queues_to_use;
u32 queue;
u32 prio;
for (queue = 0; queue < tx_queues_count; queue++) {
if (!priv->plat->tx_queues_cfg[queue].use_prio)
continue;
prio = priv->plat->tx_queues_cfg[queue].prio;
stmmac_tx_queue_prio(priv, priv->hw, prio, queue);
}
}
/**
* stmmac_mac_config_rx_queues_routing - Configure RX Queue Routing
* @priv: driver private structure
* Description: It is used for configuring the RX queue routing
*/
static void stmmac_mac_config_rx_queues_routing(struct stmmac_priv *priv)
{
u32 rx_queues_count = priv->plat->rx_queues_to_use;
u32 queue;
u8 packet;
for (queue = 0; queue < rx_queues_count; queue++) {
/* no specific packet type routing specified for the queue */
if (priv->plat->rx_queues_cfg[queue].pkt_route == 0x0)
continue;
packet = priv->plat->rx_queues_cfg[queue].pkt_route;
stmmac_rx_queue_routing(priv, priv->hw, packet, queue);
}
}
static void stmmac_mac_config_rss(struct stmmac_priv *priv)
{
if (!priv->dma_cap.rssen || !priv->plat->rss_en) {
priv->rss.enable = false;
return;
}
if (priv->dev->features & NETIF_F_RXHASH)
priv->rss.enable = true;
else
priv->rss.enable = false;
stmmac_rss_configure(priv, priv->hw, &priv->rss,
priv->plat->rx_queues_to_use);
}
/**
* stmmac_mtl_configuration - Configure MTL
* @priv: driver private structure
* Description: It is used for configurring MTL
*/
static void stmmac_mtl_configuration(struct stmmac_priv *priv)
{
u32 rx_queues_count = priv->plat->rx_queues_to_use;
u32 tx_queues_count = priv->plat->tx_queues_to_use;
if (tx_queues_count > 1)
stmmac_set_tx_queue_weight(priv);
/* Configure MTL RX algorithms */
if (rx_queues_count > 1)
stmmac_prog_mtl_rx_algorithms(priv, priv->hw,
priv->plat->rx_sched_algorithm);
/* Configure MTL TX algorithms */
if (tx_queues_count > 1)
stmmac_prog_mtl_tx_algorithms(priv, priv->hw,
priv->plat->tx_sched_algorithm);
/* Configure CBS in AVB TX queues */
if (tx_queues_count > 1)
stmmac_configure_cbs(priv);
/* Map RX MTL to DMA channels */
stmmac_rx_queue_dma_chan_map(priv);
/* Enable MAC RX Queues */
stmmac_mac_enable_rx_queues(priv);
/* Set RX priorities */
if (rx_queues_count > 1)
stmmac_mac_config_rx_queues_prio(priv);
/* Set TX priorities */
if (tx_queues_count > 1)
stmmac_mac_config_tx_queues_prio(priv);
/* Set RX routing */
if (rx_queues_count > 1)
stmmac_mac_config_rx_queues_routing(priv);
/* Receive Side Scaling */
if (rx_queues_count > 1)
stmmac_mac_config_rss(priv);
}
static void stmmac_safety_feat_configuration(struct stmmac_priv *priv)
{
if (priv->dma_cap.asp) {
netdev_info(priv->dev, "Enabling Safety Features\n");
stmmac_safety_feat_config(priv, priv->ioaddr, priv->dma_cap.asp);
} else {
netdev_info(priv->dev, "No Safety Features support found\n");
}
}
/**
* stmmac_hw_setup - setup mac in a usable state.
* @dev : pointer to the device structure.
* Description:
* this is the main function to setup the HW in a usable state because the
* dma engine is reset, the core registers are configured (e.g. AXI,
* Checksum features, timers). The DMA is ready to start receiving and
* transmitting.
* Return value:
* 0 on success and an appropriate (-)ve integer as defined in errno.h
* file on failure.
*/
static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 rx_cnt = priv->plat->rx_queues_to_use;
u32 tx_cnt = priv->plat->tx_queues_to_use;
u32 chan;
int ret;
/* DMA initialization and SW reset */
ret = stmmac_init_dma_engine(priv);
if (ret < 0) {
netdev_err(priv->dev, "%s: DMA engine initialization failed\n",
__func__);
return ret;
}
/* Copy the MAC addr into the HW */
stmmac_set_umac_addr(priv, priv->hw, dev->dev_addr, 0);
/* PS and related bits will be programmed according to the speed */
if (priv->hw->pcs) {
int speed = priv->plat->mac_port_sel_speed;
if ((speed == SPEED_10) || (speed == SPEED_100) ||
(speed == SPEED_1000)) {
priv->hw->ps = speed;
} else {
dev_warn(priv->device, "invalid port speed\n");
priv->hw->ps = 0;
}
}
/* Initialize the MAC Core */
stmmac_core_init(priv, priv->hw, dev);
/* Initialize MTL*/
stmmac_mtl_configuration(priv);
/* Initialize Safety Features */
stmmac_safety_feat_configuration(priv);
ret = stmmac_rx_ipc(priv, priv->hw);
if (!ret) {
netdev_warn(priv->dev, "RX IPC Checksum Offload disabled\n");
priv->plat->rx_coe = STMMAC_RX_COE_NONE;
priv->hw->rx_csum = 0;
}
/* Enable the MAC Rx/Tx */
stmmac_mac_set(priv, priv->ioaddr, true);
/* Set the HW DMA mode and the COE */
stmmac_dma_operation_mode(priv);
stmmac_mmc_setup(priv);
if (init_ptp) {
ret = clk_prepare_enable(priv->plat->clk_ptp_ref);
if (ret < 0)
netdev_warn(priv->dev, "failed to enable PTP reference clock: %d\n", ret);
ret = stmmac_init_ptp(priv);
if (ret == -EOPNOTSUPP)
netdev_warn(priv->dev, "PTP not supported by HW\n");
else if (ret)
netdev_warn(priv->dev, "PTP init failed\n");
}
priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS;
if (priv->use_riwt) {
if (!priv->rx_riwt)
priv->rx_riwt = DEF_DMA_RIWT;
ret = stmmac_rx_watchdog(priv, priv->ioaddr, priv->rx_riwt, rx_cnt);
}
if (priv->hw->pcs)
stmmac_pcs_ctrl_ane(priv, priv->ioaddr, 1, priv->hw->ps, 0);
/* set TX and RX rings length */
stmmac_set_rings_length(priv);
/* Enable TSO */
if (priv->tso) {
for (chan = 0; chan < tx_cnt; chan++)
stmmac_enable_tso(priv, priv->ioaddr, 1, chan);
}
/* Enable Split Header */
if (priv->sph && priv->hw->rx_csum) {
for (chan = 0; chan < rx_cnt; chan++)
stmmac_enable_sph(priv, priv->ioaddr, 1, chan);
}
/* VLAN Tag Insertion */
if (priv->dma_cap.vlins)
stmmac_enable_vlan(priv, priv->hw, STMMAC_VLAN_INSERT);
/* TBS */
for (chan = 0; chan < tx_cnt; chan++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan];
int enable = tx_q->tbs & STMMAC_TBS_AVAIL;
stmmac_enable_tbs(priv, priv->ioaddr, enable, chan);
}
/* Start the ball rolling... */
stmmac_start_all_dma(priv);
return 0;
}
static void stmmac_hw_teardown(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
clk_disable_unprepare(priv->plat->clk_ptp_ref);
}
/**
* stmmac_open - open entry point of the driver
* @dev : pointer to the device structure.
* Description:
* This function is the open entry point of the driver.
* Return value:
* 0 on success and an appropriate (-)ve integer as defined in errno.h
* file on failure.
*/
static int stmmac_open(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
int bfsize = 0;
u32 chan;
int ret;
if (priv->hw->pcs != STMMAC_PCS_TBI &&
priv->hw->pcs != STMMAC_PCS_RTBI) {
ret = stmmac_init_phy(dev);
if (ret) {
netdev_err(priv->dev,
"%s: Cannot attach to PHY (error: %d)\n",
__func__, ret);
return ret;
}
}
/* Extra statistics */
memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
priv->xstats.threshold = tc;
bfsize = stmmac_set_16kib_bfsize(priv, dev->mtu);
if (bfsize < 0)
bfsize = 0;
if (bfsize < BUF_SIZE_16KiB)
bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz);
priv->dma_buf_sz = bfsize;
buf_sz = bfsize;
priv->rx_copybreak = STMMAC_RX_COPYBREAK;
/* Earlier check for TBS */
for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan];
int tbs_en = priv->plat->tx_queues_cfg[chan].tbs_en;
tx_q->tbs |= tbs_en ? STMMAC_TBS_AVAIL : 0;
if (stmmac_enable_tbs(priv, priv->ioaddr, tbs_en, chan))
tx_q->tbs &= ~STMMAC_TBS_AVAIL;
}
ret = alloc_dma_desc_resources(priv);
if (ret < 0) {
netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n",
__func__);
goto dma_desc_error;
}
ret = init_dma_desc_rings(dev, GFP_KERNEL);
if (ret < 0) {
netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n",
__func__);
goto init_error;
}
ret = stmmac_hw_setup(dev, true);
if (ret < 0) {
netdev_err(priv->dev, "%s: Hw setup failed\n", __func__);
goto init_error;
}
stmmac_init_coalesce(priv);
phylink_start(priv->phylink);
/* Request the IRQ lines */
ret = request_irq(dev->irq, stmmac_interrupt,
IRQF_SHARED, dev->name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: ERROR: allocating the IRQ %d (error: %d)\n",
__func__, dev->irq, ret);
goto irq_error;
}
/* Request the Wake IRQ in case of another line is used for WoL */
if (priv->wol_irq != dev->irq) {
ret = request_irq(priv->wol_irq, stmmac_interrupt,
IRQF_SHARED, dev->name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: ERROR: allocating the WoL IRQ %d (%d)\n",
__func__, priv->wol_irq, ret);
goto wolirq_error;
}
}
/* Request the IRQ lines */
if (priv-><