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net: stmmac: introduce MSI Interrupt routines for mac, safety, RX & TX

Browse source 
Now we introduce MSI interrupt service routines and hook these routines
up if stmmac_open() sees valid irq line being requested:-

stmmac_mac_interrupt()    :- MAC (dev->irq), WOL (wol_irq), LPI (lpi_irq)
stmmac_safety_interrupt() :- Safety Feat Correctible Error (sfty_ce_irq)
                             & Uncorrectible Error (sfty_ue_irq)
stmmac_msi_intr_rx()      :- For all RX MSI irq (rx_irq)
stmmac_msi_intr_tx()      :- For all TX MSI irq (tx_irq)

Each of IRQs will have its unique name so that we can differentiate
them easily under /proc/interrupts.

Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Voon Weifeng <weifeng.voon@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ong Boon Leong 2021-03-26 01:39:14 +08:00 committed by David S. Miller
parent 29e6573c61
commit 8532f613bc
4 changed files with 431 additions and 45 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
drivers/net/ethernet/stmicro/stmmac/common.h
View file

@ -259,6 +259,9 @@ struct stmmac_safety_stats {
#define DMA_HW_FEAT_ACTPHYIF 0x70000000 /* Active/selected PHY iface */
#define DEFAULT_DMA_PBL 8
/* MSI defines */
#define STMMAC_MSI_VEC_MAX 32
/* PCS status and mask defines */
#define PCS_ANE_IRQ BIT(2) /* PCS Auto-Negotiation */
#define PCS_LINK_IRQ BIT(1) /* PCS Link */
@ -315,6 +318,18 @@ enum dma_irq_dir {
DMA_DIR_RXTX = 0x3,
};
enum request_irq_err {
REQ_IRQ_ERR_ALL,
REQ_IRQ_ERR_TX,
REQ_IRQ_ERR_RX,
REQ_IRQ_ERR_SFTY_UE,
REQ_IRQ_ERR_SFTY_CE,
REQ_IRQ_ERR_LPI,
REQ_IRQ_ERR_WOL,
REQ_IRQ_ERR_MAC,
REQ_IRQ_ERR_NO,
};
/* EEE and LPI defines */
#define CORE_IRQ_TX_PATH_IN_LPI_MODE (1 << 0)
#define CORE_IRQ_TX_PATH_EXIT_LPI_MODE (1 << 1)

16
drivers/net/ethernet/stmicro/stmmac/stmmac.h
View file

@ -30,6 +30,10 @@ struct stmmac_resources {
int wol_irq;
int lpi_irq;
int irq;
int sfty_ce_irq;
int sfty_ue_irq;
int rx_irq[MTL_MAX_RX_QUEUES];
int tx_irq[MTL_MAX_TX_QUEUES];
};
struct stmmac_tx_info {
@ -225,6 +229,18 @@ struct stmmac_priv {
void __iomem *mmcaddr;
void __iomem *ptpaddr;
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
int sfty_ce_irq;
int sfty_ue_irq;
int rx_irq[MTL_MAX_RX_QUEUES];
int tx_irq[MTL_MAX_TX_QUEUES];
/*irq name */
char int_name_mac[IFNAMSIZ + 9];
char int_name_wol[IFNAMSIZ + 9];
char int_name_lpi[IFNAMSIZ + 9];
char int_name_sfty_ce[IFNAMSIZ + 10];
char int_name_sfty_ue[IFNAMSIZ + 10];
char int_name_rx_irq[MTL_MAX_TX_QUEUES][IFNAMSIZ + 14];
char int_name_tx_irq[MTL_MAX_TX_QUEUES][IFNAMSIZ + 18];
#ifdef CONFIG_DEBUG_FS
struct dentry *dbgfs_dir;

437
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View file

@ -105,6 +105,11 @@ 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);
/* For MSI interrupts handling */
static irqreturn_t stmmac_mac_interrupt(int irq, void *dev_id);
static irqreturn_t stmmac_safety_interrupt(int irq, void *dev_id);
static irqreturn_t stmmac_msi_intr_tx(int irq, void *data);
static irqreturn_t stmmac_msi_intr_rx(int irq, void *data);
#ifdef CONFIG_DEBUG_FS
static const struct net_device_ops stmmac_netdev_ops;
@ -2986,6 +2991,260 @@ static void stmmac_hw_teardown(struct net_device *dev)
clk_disable_unprepare(priv->plat->clk_ptp_ref);
}
static void stmmac_free_irq(struct net_device *dev,
enum request_irq_err irq_err, int irq_idx)
{
struct stmmac_priv *priv = netdev_priv(dev);
int j;
switch (irq_err) {
case REQ_IRQ_ERR_ALL:
irq_idx = priv->plat->tx_queues_to_use;
fallthrough;
case REQ_IRQ_ERR_TX:
for (j = irq_idx - 1; j >= 0; j--) {
if (priv->tx_irq[j] > 0)
free_irq(priv->tx_irq[j], &priv->tx_queue[j]);
}
irq_idx = priv->plat->rx_queues_to_use;
fallthrough;
case REQ_IRQ_ERR_RX:
for (j = irq_idx - 1; j >= 0; j--) {
if (priv->rx_irq[j] > 0)
free_irq(priv->rx_irq[j], &priv->rx_queue[j]);
}
if (priv->sfty_ue_irq > 0 && priv->sfty_ue_irq != dev->irq)
free_irq(priv->sfty_ue_irq, dev);
fallthrough;
case REQ_IRQ_ERR_SFTY_UE:
if (priv->sfty_ce_irq > 0 && priv->sfty_ce_irq != dev->irq)
free_irq(priv->sfty_ce_irq, dev);
fallthrough;
case REQ_IRQ_ERR_SFTY_CE:
if (priv->lpi_irq > 0 && priv->lpi_irq != dev->irq)
free_irq(priv->lpi_irq, dev);
fallthrough;
case REQ_IRQ_ERR_LPI:
if (priv->wol_irq > 0 && priv->wol_irq != dev->irq)
free_irq(priv->wol_irq, dev);
fallthrough;
case REQ_IRQ_ERR_WOL:
free_irq(dev->irq, dev);
fallthrough;
case REQ_IRQ_ERR_MAC:
case REQ_IRQ_ERR_NO:
/* If MAC IRQ request error, no more IRQ to free */
break;
}
}
static int stmmac_request_irq_multi_msi(struct net_device *dev)
{
enum request_irq_err irq_err = REQ_IRQ_ERR_NO;
struct stmmac_priv *priv = netdev_priv(dev);
int irq_idx = 0;
char *int_name;
int ret;
int i;
/* For common interrupt */
int_name = priv->int_name_mac;
sprintf(int_name, "%s:%s", dev->name, "mac");
ret = request_irq(dev->irq, stmmac_mac_interrupt,
0, int_name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: alloc mac MSI %d (error: %d)\n",
__func__, dev->irq, ret);
irq_err = REQ_IRQ_ERR_MAC;
goto irq_error;
}
/* Request the Wake IRQ in case of another line
* is used for WoL
*/
if (priv->wol_irq > 0 && priv->wol_irq != dev->irq) {
int_name = priv->int_name_wol;
sprintf(int_name, "%s:%s", dev->name, "wol");
ret = request_irq(priv->wol_irq,
stmmac_mac_interrupt,
0, int_name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: alloc wol MSI %d (error: %d)\n",
__func__, priv->wol_irq, ret);
irq_err = REQ_IRQ_ERR_WOL;
goto irq_error;
}
}
/* Request the LPI IRQ in case of another line
* is used for LPI
*/
if (priv->lpi_irq > 0 && priv->lpi_irq != dev->irq) {
int_name = priv->int_name_lpi;
sprintf(int_name, "%s:%s", dev->name, "lpi");
ret = request_irq(priv->lpi_irq,
stmmac_mac_interrupt,
0, int_name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: alloc lpi MSI %d (error: %d)\n",
__func__, priv->lpi_irq, ret);
irq_err = REQ_IRQ_ERR_LPI;
goto irq_error;
}
}
/* Request the Safety Feature Correctible Error line in
* case of another line is used
*/
if (priv->sfty_ce_irq > 0 && priv->sfty_ce_irq != dev->irq) {
int_name = priv->int_name_sfty_ce;
sprintf(int_name, "%s:%s", dev->name, "safety-ce");
ret = request_irq(priv->sfty_ce_irq,
stmmac_safety_interrupt,
0, int_name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: alloc sfty ce MSI %d (error: %d)\n",
__func__, priv->sfty_ce_irq, ret);
irq_err = REQ_IRQ_ERR_SFTY_CE;
goto irq_error;
}
}
/* Request the Safety Feature Uncorrectible Error line in
* case of another line is used
*/
if (priv->sfty_ue_irq > 0 && priv->sfty_ue_irq != dev->irq) {
int_name = priv->int_name_sfty_ue;
sprintf(int_name, "%s:%s", dev->name, "safety-ue");
ret = request_irq(priv->sfty_ue_irq,
stmmac_safety_interrupt,
0, int_name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: alloc sfty ue MSI %d (error: %d)\n",
__func__, priv->sfty_ue_irq, ret);
irq_err = REQ_IRQ_ERR_SFTY_UE;
goto irq_error;
}
}
/* Request Rx MSI irq */
for (i = 0; i < priv->plat->rx_queues_to_use; i++) {
if (priv->rx_irq[i] == 0)
continue;
int_name = priv->int_name_rx_irq[i];
sprintf(int_name, "%s:%s-%d", dev->name, "rx", i);
ret = request_irq(priv->rx_irq[i],
stmmac_msi_intr_rx,
0, int_name, &priv->rx_queue[i]);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: alloc rx-%d MSI %d (error: %d)\n",
__func__, i, priv->rx_irq[i], ret);
irq_err = REQ_IRQ_ERR_RX;
irq_idx = i;
goto irq_error;
}
}
/* Request Tx MSI irq */
for (i = 0; i < priv->plat->tx_queues_to_use; i++) {
if (priv->tx_irq[i] == 0)
continue;
int_name = priv->int_name_tx_irq[i];
sprintf(int_name, "%s:%s-%d", dev->name, "tx", i);
ret = request_irq(priv->tx_irq[i],
stmmac_msi_intr_tx,
0, int_name, &priv->tx_queue[i]);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: alloc tx-%d MSI %d (error: %d)\n",
__func__, i, priv->tx_irq[i], ret);
irq_err = REQ_IRQ_ERR_TX;
irq_idx = i;
goto irq_error;
}
}
return 0;
irq_error:
stmmac_free_irq(dev, irq_err, irq_idx);
return ret;
}
static int stmmac_request_irq_single(struct net_device *dev)
{
enum request_irq_err irq_err = REQ_IRQ_ERR_NO;
struct stmmac_priv *priv = netdev_priv(dev);
int ret;
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);
irq_err = REQ_IRQ_ERR_MAC;
return ret;
}
/* Request the Wake IRQ in case of another line
* is used for WoL
*/
if (priv->wol_irq > 0 && 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);
irq_err = REQ_IRQ_ERR_WOL;
return ret;
}
}
/* Request the IRQ lines */
if (priv->lpi_irq > 0 && priv->lpi_irq != dev->irq) {
ret = request_irq(priv->lpi_irq, stmmac_interrupt,
IRQF_SHARED, dev->name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: ERROR: allocating the LPI IRQ %d (%d)\n",
__func__, priv->lpi_irq, ret);
irq_err = REQ_IRQ_ERR_LPI;
goto irq_error;
}
}
return 0;
irq_error:
stmmac_free_irq(dev, irq_err, 0);
return ret;
}
static int stmmac_request_irq(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
int ret;
/* Request the IRQ lines */
if (priv->plat->multi_msi_en)
ret = stmmac_request_irq_multi_msi(dev);
else
ret = stmmac_request_irq_single(dev);
return ret;
}
/**
* stmmac_open - open entry point of the driver
* @dev : pointer to the device structure.
@ -3077,50 +3336,15 @@ static int stmmac_open(struct net_device *dev)
/* We may have called phylink_speed_down before */
phylink_speed_up(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);
ret = stmmac_request_irq(dev);
if (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->lpi_irq > 0) {
ret = request_irq(priv->lpi_irq, stmmac_interrupt, IRQF_SHARED,
dev->name, dev);
if (unlikely(ret < 0)) {
netdev_err(priv->dev,
"%s: ERROR: allocating the LPI IRQ %d (%d)\n",
__func__, priv->lpi_irq, ret);
goto lpiirq_error;
}
}
stmmac_enable_all_queues(priv);
netif_tx_start_all_queues(priv->dev);
return 0;
lpiirq_error:
if (priv->wol_irq != dev->irq)
free_irq(priv->wol_irq, dev);
wolirq_error:
free_irq(dev->irq, dev);
irq_error:
phylink_stop(priv->phylink);
@ -3170,11 +3394,7 @@ static int stmmac_release(struct net_device *dev)
hrtimer_cancel(&priv->tx_queue[chan].txtimer);
/* Free the IRQ lines */
free_irq(dev->irq, dev);
if (priv->wol_irq != dev->irq)
free_irq(priv->wol_irq, dev);
if (priv->lpi_irq > 0)
free_irq(priv->lpi_irq, dev);
stmmac_free_irq(dev, REQ_IRQ_ERR_ALL, 0);
if (priv->eee_enabled) {
priv->tx_path_in_lpi_mode = false;
@ -4477,15 +4697,136 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
static irqreturn_t stmmac_mac_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct stmmac_priv *priv = netdev_priv(dev);
if (unlikely(!dev)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;
/* To handle Common interrupts */
stmmac_common_interrupt(priv);
return IRQ_HANDLED;
}
static irqreturn_t stmmac_safety_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct stmmac_priv *priv = netdev_priv(dev);
if (unlikely(!dev)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;
/* Check if a fatal error happened */
stmmac_safety_feat_interrupt(priv);
return IRQ_HANDLED;
}
static irqreturn_t stmmac_msi_intr_tx(int irq, void *data)
{
struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)data;
int chan = tx_q->queue_index;
struct stmmac_priv *priv;
int status;
priv = container_of(tx_q, struct stmmac_priv, tx_queue[chan]);
if (unlikely(!data)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;
status = stmmac_napi_check(priv, chan, DMA_DIR_TX);
if (unlikely(status & 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 == tx_hard_error)) {
stmmac_tx_err(priv, chan);
}
return IRQ_HANDLED;
}
static irqreturn_t stmmac_msi_intr_rx(int irq, void *data)
{
struct stmmac_rx_queue *rx_q = (struct stmmac_rx_queue *)data;
int chan = rx_q->queue_index;
struct stmmac_priv *priv;
priv = container_of(rx_q, struct stmmac_priv, rx_queue[chan]);
if (unlikely(!data)) {
netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
return IRQ_NONE;
}
/* Check if adapter is up */
if (test_bit(STMMAC_DOWN, &priv->state))
return IRQ_HANDLED;
stmmac_napi_check(priv, chan, DMA_DIR_RX);
return IRQ_HANDLED;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
/* Polling receive - used by NETCONSOLE and other diagnostic tools
* to allow network I/O with interrupts disabled.
*/
static void stmmac_poll_controller(struct net_device *dev)
{
disable_irq(dev->irq);
stmmac_interrupt(dev->irq, dev);
enable_irq(dev->irq);
struct stmmac_priv *priv = netdev_priv(dev);
int i;
/* If adapter is down, do nothing */
if (test_bit(STMMAC_DOWN, &priv->state))
return;
if (priv->plat->multi_msi_en) {
for (i = 0; i < priv->plat->rx_queues_to_use; i++)
stmmac_msi_intr_rx(0, &priv->rx_queue[i]);
for (i = 0; i < priv->plat->tx_queues_to_use; i++)
stmmac_msi_intr_tx(0, &priv->tx_queue[i]);
} else {
disable_irq(dev->irq);
stmmac_interrupt(dev->irq, dev);
enable_irq(dev->irq);
}
}
#endif
@ -5283,6 +5624,12 @@ int stmmac_dvr_probe(struct device *device,
priv->dev->irq = res->irq;
priv->wol_irq = res->wol_irq;
priv->lpi_irq = res->lpi_irq;
priv->sfty_ce_irq = res->sfty_ce_irq;
priv->sfty_ue_irq = res->sfty_ue_irq;
for (i = 0; i < MTL_MAX_RX_QUEUES; i++)
priv->rx_irq[i] = res->rx_irq[i];
for (i = 0; i < MTL_MAX_TX_QUEUES; i++)
priv->tx_irq[i] = res->tx_irq[i];
if (!IS_ERR_OR_NULL(res->mac))
memcpy(priv->dev->dev_addr, res->mac, ETH_ALEN);

8
include/linux/stmmac.h
View file

@ -237,5 +237,13 @@ struct plat_stmmacenet_data {
struct pci_dev *pdev;
bool has_crossts;
int int_snapshot_num;
bool multi_msi_en;
int msi_mac_vec;
int msi_wol_vec;
int msi_lpi_vec;
int msi_sfty_ce_vec;
int msi_sfty_ue_vec;
int msi_rx_base_vec;
int msi_tx_base_vec;
};
#endif