/*
* Copyright (c) 2018-2020, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#include
#include
#include "ether_linux.h"
/**
* @brief Work Queue function to call osi_read_mmc() periodically.
*
* Algorithm: call osi_read_mmc in periodic manner to avoid possibility of
* overrun of 32 bit MMC hw registers.
*
* @param[in] work: work structure
*
* @note MAC and PHY need to be initialized.
*/
static inline void ether_stats_work_func(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct ether_priv_data *pdata = container_of(dwork,
struct ether_priv_data, ether_stats_work);
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret;
ret = osi_read_mmc(osi_core);
if (ret < 0) {
dev_err(pdata->dev, "failed to read MMC counters %s\n",
__func__);
}
schedule_delayed_work(&pdata->ether_stats_work,
msecs_to_jiffies(ETHER_STATS_TIMER * 1000));
}
/**
* @brief Start delayed workqueue.
*
* Algorithm: Start workqueue to read RMON HW counters periodically.
* Workqueue will get schedule in every ETHER_STATS_TIMER sec.
* Workqueue will be scheduled only if HW supports RMON HW counters.
*
* @param[in] pdata:OSD private data
*
* @note MAC and PHY need to be initialized.
*/
static inline void ether_stats_work_queue_start(struct ether_priv_data *pdata)
{
#if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE)
if (pdata->hw_feat.mmc_sel == OSI_ENABLE &&
pdata->use_stats == OSI_ENABLE) {
#else
if (pdata->hw_feat.mmc_sel == OSI_ENABLE) {
#endif
schedule_delayed_work(&pdata->ether_stats_work,
msecs_to_jiffies(ETHER_STATS_TIMER *
1000));
}
}
/**
* @brief Stop delayed workqueue.
*
* Algorithm:
* Cancel workqueue.
*
* @param[in] pdata:OSD private data
*/
static inline void ether_stats_work_queue_stop(struct ether_priv_data *pdata)
{
#if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE)
if (pdata->hw_feat.mmc_sel == OSI_ENABLE &&
pdata->use_stats == OSI_ENABLE) {
#else
if (pdata->hw_feat.mmc_sel == OSI_ENABLE) {
#endif
cancel_delayed_work_sync(&pdata->ether_stats_work);
}
}
/**
* @brief Disable all MAC related clks
*
* Algorithm: Release the reference counter for the clks by using
* clock subsystem provided API's
*
* @param[in] pdata: OSD private data.
*/
static void ether_disable_clks(struct ether_priv_data *pdata)
{
if (pdata->osi_core->pre_si)
goto exit;
if (!IS_ERR_OR_NULL(pdata->axi_cbb_clk)) {
clk_disable_unprepare(pdata->axi_cbb_clk);
}
if (!IS_ERR_OR_NULL(pdata->axi_clk)) {
clk_disable_unprepare(pdata->axi_clk);
}
if (!IS_ERR_OR_NULL(pdata->rx_clk)) {
clk_disable_unprepare(pdata->rx_clk);
}
if (!IS_ERR_OR_NULL(pdata->ptp_ref_clk)) {
clk_disable_unprepare(pdata->ptp_ref_clk);
}
if (!IS_ERR_OR_NULL(pdata->tx_clk)) {
clk_disable_unprepare(pdata->tx_clk);
}
if (!IS_ERR_OR_NULL(pdata->pllrefe_clk)) {
clk_disable_unprepare(pdata->pllrefe_clk);
}
exit:
pdata->clks_enable = false;
}
/**
* @brief Enable all MAC related clks.
*
* Algorithm: Enables the clks by using clock subsystem provided API's.
*
* @param[in] pdata: OSD private data.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_enable_clks(struct ether_priv_data *pdata)
{
int ret;
if (pdata->osi_core->pre_si)
goto exit;
if (!IS_ERR_OR_NULL(pdata->pllrefe_clk)) {
ret = clk_prepare_enable(pdata->pllrefe_clk);
if (ret < 0) {
return ret;
}
}
if (!IS_ERR_OR_NULL(pdata->axi_cbb_clk)) {
ret = clk_prepare_enable(pdata->axi_cbb_clk);
if (ret) {
goto err_axi_cbb;
}
}
if (!IS_ERR_OR_NULL(pdata->axi_clk)) {
ret = clk_prepare_enable(pdata->axi_clk);
if (ret < 0) {
goto err_axi;
}
}
if (!IS_ERR_OR_NULL(pdata->rx_clk)) {
ret = clk_prepare_enable(pdata->rx_clk);
if (ret < 0) {
goto err_rx;
}
}
if (!IS_ERR_OR_NULL(pdata->ptp_ref_clk)) {
ret = clk_prepare_enable(pdata->ptp_ref_clk);
if (ret < 0) {
goto err_ptp_ref;
}
}
if (!IS_ERR_OR_NULL(pdata->tx_clk)) {
ret = clk_prepare_enable(pdata->tx_clk);
if (ret < 0) {
goto err_tx;
}
}
exit:
pdata->clks_enable = true;
return 0;
err_tx:
if (!IS_ERR_OR_NULL(pdata->ptp_ref_clk)) {
clk_disable_unprepare(pdata->ptp_ref_clk);
}
err_ptp_ref:
if (!IS_ERR_OR_NULL(pdata->rx_clk)) {
clk_disable_unprepare(pdata->rx_clk);
}
err_rx:
if (!IS_ERR_OR_NULL(pdata->axi_clk)) {
clk_disable_unprepare(pdata->axi_clk);
}
err_axi:
if (!IS_ERR_OR_NULL(pdata->axi_cbb_clk)) {
clk_disable_unprepare(pdata->axi_cbb_clk);
}
err_axi_cbb:
if (!IS_ERR_OR_NULL(pdata->pllrefe_clk)) {
clk_disable_unprepare(pdata->pllrefe_clk);
}
return ret;
}
/**
* @brief ether_conf_eee - Init and configure EEE LPI in the MAC
*
* Algorithm:
* 1) Check if EEE is requested to be enabled/disabled.
* 2) If enabled, then check if current PHY speed/mode supports EEE.
* 3) If PHY supports, then enable the Tx LPI timers in MAC and set EEE active.
* 4) Else disable the Tx LPI timers in MAC and set EEE inactive.
*
* @param[in] pdata: Pointer to driver private data structure
* @param[in] tx_lpi_enable: Flag to indicate Tx LPI enable (1) or disable (0)
*
* @note MAC and PHY need to be initialized.
*
* @retval OSI_ENABLE if EEE is enabled/active
* @retval OSI_DISABLE if EEE is disabled/inactive
*/
int ether_conf_eee(struct ether_priv_data *pdata, unsigned int tx_lpi_enable)
{
int ret = 0;
struct phy_device *phydev = pdata->phydev;
unsigned int enable = tx_lpi_enable;
if (tx_lpi_enable) {
/* phy_init_eee() returns 0 if EEE is supported by the PHY */
if (phy_init_eee(phydev, OSI_ENABLE)) {
/* PHY does not support EEE, disable it in MAC */
enable = OSI_DISABLE;
} else {
/* PHY supports EEE, if link is up enable EEE */
enable = (unsigned int)phydev->link;
}
}
/* Enable EEE */
ret = osi_configure_eee(pdata->osi_core,
enable,
pdata->tx_lpi_timer);
/* Return current status of EEE based on OSI API success/failure */
if (ret != 0) {
if (enable) {
dev_warn(pdata->dev, "Failed to enable EEE\n");
ret = OSI_DISABLE;
} else {
dev_warn(pdata->dev, "Failed to disable EEE\n");
ret = OSI_ENABLE;
}
} else {
/* EEE enabled/disabled successfully as per enable flag */
ret = enable;
}
return ret;
}
/**
* @brief Adjust link call back
*
* Algorithm: Callback function called by the PHY subsystem
* whenever there is a link detected or link changed on the
* physical layer.
*
* @param[in] dev: Network device data.
*
* @note MAC and PHY need to be initialized.
*/
static void ether_adjust_link(struct net_device *dev)
{
struct ether_priv_data *pdata = netdev_priv(dev);
struct phy_device *phydev = pdata->phydev;
int new_state = 0, speed_changed = 0;
unsigned long val;
unsigned int eee_enable = OSI_DISABLE;
int ret = 0;
if (phydev == NULL) {
return;
}
if (phydev->link) {
if ((pdata->osi_core->pause_frames == OSI_PAUSE_FRAMES_ENABLE)
&& (phydev->pause || phydev->asym_pause)) {
osi_configure_flow_control(pdata->osi_core,
pdata->osi_core->flow_ctrl);
}
if (phydev->duplex != pdata->oldduplex) {
new_state = 1;
osi_set_mode(pdata->osi_core, phydev->duplex);
pdata->oldduplex = phydev->duplex;
}
if (phydev->speed != pdata->speed) {
new_state = 1;
speed_changed = 1;
ret = osi_set_speed(pdata->osi_core, phydev->speed);
if (ret < 0) {
netdev_err(dev, "Failed to set speed\n");
return;
}
pdata->speed = phydev->speed;
}
if (!pdata->oldlink) {
new_state = 1;
pdata->oldlink = 1;
val = pdata->osi_core->xstats.link_connect_count;
pdata->osi_core->xstats.link_connect_count =
osi_update_stats_counter(val, 1UL);
}
} else if (pdata->oldlink) {
new_state = 1;
pdata->oldlink = 0;
pdata->speed = 0;
pdata->oldduplex = -1;
val = pdata->osi_core->xstats.link_disconnect_count;
pdata->osi_core->xstats.link_disconnect_count =
osi_update_stats_counter(val, 1UL);
} else {
/* Nothing here */
}
if (new_state) {
phy_print_status(phydev);
}
if (speed_changed) {
clk_set_rate(pdata->tx_clk,
(phydev->speed == SPEED_10) ? 2500 * 1000 :
(phydev->speed ==
SPEED_100) ? 25000 * 1000 : 125000 * 1000);
if (phydev->speed != SPEED_10) {
if (osi_pad_calibrate(pdata->osi_core) < 0)
dev_err(pdata->dev,
"failed to do pad caliberation\n");
}
}
/* Configure EEE if it is enabled */
if (pdata->eee_enabled && pdata->tx_lpi_enabled) {
eee_enable = OSI_ENABLE;
}
pdata->eee_active = ether_conf_eee(pdata, eee_enable);
}
/**
* @brief Initialize the PHY
*
* Algorithm: 1) Resets the PHY. 2) Connect to the phy described in the device tree.
*
* @param[in] dev: Network device data.
*
* @note MAC needs to be out of reset.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_phy_init(struct net_device *dev)
{
struct ether_priv_data *pdata = netdev_priv(dev);
struct phy_device *phydev = NULL;
#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
const unsigned int long supported = (SUPPORTED_Pause |
SUPPORTED_Asym_Pause);
const unsigned int long not_supported = ~(SUPPORTED_Pause |
SUPPORTED_Asym_Pause);
#endif
pdata->oldlink = 0;
pdata->speed = SPEED_UNKNOWN;
pdata->oldduplex = SPEED_UNKNOWN;
if (pdata->phy_node != NULL) {
phydev = of_phy_connect(dev, pdata->phy_node,
ðer_adjust_link, 0,
pdata->interface);
}
if (phydev == NULL) {
dev_err(pdata->dev, "failed to connect PHY\n");
return -ENODEV;
}
if ((pdata->phy_node == NULL) && phydev->phy_id == 0U) {
phy_disconnect(phydev);
return -ENODEV;
}
/* In marvel phy driver pause is disabled. Instead of enabling
* in PHY driver, handle this in eqos driver so that enabling/disabling
* of the pause frame feature can be controlled based on the platform
*/
#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
linkmode_or(phydev->supported, phydev->supported,
&supported);
#else
phydev->supported |= (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
#endif
if (pdata->osi_core->pause_frames == OSI_PAUSE_FRAMES_DISABLE)
#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
linkmode_and(phydev->supported,
phydev->supported,
¬_supported);
#else
phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
#endif
#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
linkmode_copy(phydev->advertising,
phydev->supported);
#else
phydev->advertising = phydev->supported;
#endif
pdata->phydev = phydev;
return 0;
}
/**
* @brief ether_vm_isr - VM based ISR routine.
*
* Algorithm:
* 1) Get global DMA status (common for all VM IRQ's)
* + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
* + RX7 + TX7 + RX6 + TX6 + . . . . . . . + RX1 + TX1 + RX0 + TX0 +
* + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
*
* 2) Mask the channels which are specific to VM in global DMA status.
* 3) Process all DMA channel interrupts which are triggered the IRQ
* a) Find first first set from LSB with ffs
* b) The least significant bit is position 1 for ffs. So decremented
* by one to start from zero.
* c) Get channel number and TX/RX info by using bit position.
* d) Invoke OSI layer to clear interrupt source for DMA Tx/Rx at
* DMA and wrapper level.
* e) Get NAPI instance based on channel number and schedule the same.
*
* @param[in] irq: IRQ number.
* @param[in] data: VM IRQ private data structure.
*
* @note MAC and PHY need to be initialized.
*
* @retval IRQ_HANDLED on success.
* @retval IRQ_NONE on failure.
*/
irqreturn_t ether_vm_isr(int irq, void *data)
{
struct ether_vm_irq_data *vm_irq = (struct ether_vm_irq_data *)data;
struct ether_priv_data *pdata = vm_irq->pdata;
unsigned int temp = 0, chan = 0, txrx = 0;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct ether_rx_napi *rx_napi = NULL;
struct ether_tx_napi *tx_napi = NULL;
unsigned int dma_status;
/* TODO: locking required since this is shared register b/w VM IRQ's */
dma_status = osi_get_global_dma_status(osi_dma);
dma_status &= vm_irq->chan_mask;
while (dma_status) {
temp = ffs(dma_status);
temp--;
/* divide by two get channel number */
chan = temp >> 1U;
/* bitwise and with one to get whether Tx or Rx */
txrx = temp & 1U;
if (txrx) {
osi_clear_vm_rx_intr(osi_dma, chan);
rx_napi = pdata->rx_napi[chan];
if (likely(napi_schedule_prep(&rx_napi->napi))) {
osi_disable_chan_rx_intr(osi_dma, chan);
/* TODO: Schedule NAPI on different CPU core */
__napi_schedule(&rx_napi->napi);
}
} else {
osi_clear_vm_tx_intr(osi_dma, chan);
tx_napi = pdata->tx_napi[chan];
if (likely(napi_schedule_prep(&tx_napi->napi))) {
osi_disable_chan_tx_intr(osi_dma, chan);
/* TODO: Schedule NAPI on different CPU core */
__napi_schedule(&tx_napi->napi);
}
}
dma_status &= ~BIT(temp);
}
return IRQ_HANDLED;
}
/**
* @brief Transmit done ISR Routine.
*
* Algorithm:
* 1) Get channel number private data passed to ISR.
* 2) Disable DMA Tx channel interrupt.
* 3) Schedule TX NAPI poll handler to cleanup the buffer.
*
* @param[in] irq: IRQ number.
* @param[in] data: Tx NAPI private data structure.
*
* @note MAC and PHY need to be initialized.
*
* @retval IRQ_HANDLED on success
* @retval IRQ_NONE on failure.
*/
static irqreturn_t ether_tx_chan_isr(int irq, void *data)
{
struct ether_tx_napi *tx_napi = (struct ether_tx_napi *)data;
struct ether_priv_data *pdata = tx_napi->pdata;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct osi_core_priv_data *osi_core = pdata->osi_core;
unsigned int chan = tx_napi->chan;
unsigned long flags;
unsigned long val;
spin_lock_irqsave(&pdata->rlock, flags);
osi_disable_chan_tx_intr(osi_dma, chan);
spin_unlock_irqrestore(&pdata->rlock, flags);
val = osi_core->xstats.tx_normal_irq_n[chan];
osi_core->xstats.tx_normal_irq_n[chan] =
osi_update_stats_counter(val, 1U);
if (likely(napi_schedule_prep(&tx_napi->napi))) {
__napi_schedule_irqoff(&tx_napi->napi);
/* NAPI may get scheduled when tx_usecs is enabled */
} else if (osi_dma->use_tx_usecs == OSI_DISABLE) {
pr_err("Tx DMA-%d IRQ when NAPI already scheduled!\n", chan);
WARN_ON(true);
}
return IRQ_HANDLED;
}
/**
* @brief Receive done ISR Routine
*
* Algorithm:
* 1) Get Rx channel number from Rx NAPI private data which will be passed
* during request_irq() API.
* 2) Disable DMA Rx channel interrupt.
* 3) Schedule Rx NAPI poll handler to get data from HW and pass to the
* Linux network stack.
*
* @param[in] irq: IRQ number
* @param[in] data: Rx NAPI private data structure.
*
* @note MAC and PHY need to be initialized.
*
* @retval IRQ_HANDLED on success
* @retval IRQ_NONE on failure.
*/
static irqreturn_t ether_rx_chan_isr(int irq, void *data)
{
struct ether_rx_napi *rx_napi = (struct ether_rx_napi *)data;
struct ether_priv_data *pdata = rx_napi->pdata;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct osi_core_priv_data *osi_core = pdata->osi_core;
unsigned int chan = rx_napi->chan;
unsigned long val, flags;
spin_lock_irqsave(&pdata->rlock, flags);
osi_disable_chan_rx_intr(osi_dma, chan);
spin_unlock_irqrestore(&pdata->rlock, flags);
val = osi_core->xstats.rx_normal_irq_n[chan];
osi_core->xstats.rx_normal_irq_n[chan] =
osi_update_stats_counter(val, 1U);
if (likely(napi_schedule_prep(&rx_napi->napi))) {
__napi_schedule_irqoff(&rx_napi->napi);
} else {
pr_err("Rx DMA-%d IRQ when NAPI already scheduled!\n", chan);
WARN_ON(true);
}
return IRQ_HANDLED;
}
/**
* @brief Common ISR Routine
*
* Algorithm: Invoke OSI layer to handle common interrupt.
*
* @param[in] irq: IRQ number.
* @param[in] data: Private data from ISR.
*
* @note MAC and PHY need to be initialized.
*
* @retval IRQ_HANDLED on success
* @retval IRQ_NONE on failure.
*/
static irqreturn_t ether_common_isr(int irq, void *data)
{
struct ether_priv_data *pdata = (struct ether_priv_data *)data;
osi_common_isr(pdata->osi_core);
return IRQ_HANDLED;
}
/**
* @brief Free IRQs
*
* Algorithm: This routine takes care of freeing below IRQs
* 1) Common IRQ
* 2) TX IRQ
* 3) RX IRQ
*
* @param[in] pdata: OS dependent private data structure.
*
* @note IRQs should have registered.
*/
static void ether_free_irqs(struct ether_priv_data *pdata)
{
unsigned int i;
unsigned int chan;
if (pdata->common_irq_alloc_mask & 1U) {
devm_free_irq(pdata->dev, pdata->common_irq, pdata);
pdata->common_irq_alloc_mask = 0U;
}
#if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE)
if (pdata->ivck != NULL) {
cancel_work_sync(&pdata->ivc_work);
tegra_hv_ivc_unreserve(pdata->ivck);
devm_free_irq(pdata->dev, pdata->ivck->irq, pdata);
}
#endif
if (pdata->osi_core->mac_ver > OSI_EQOS_MAC_5_00) {
for (i = 0; i < pdata->osi_dma->num_vm_irqs; i++) {
if (pdata->rx_irq_alloc_mask & (OSI_ENABLE << i)) {
devm_free_irq(pdata->dev, pdata->vm_irqs[i],
&pdata->vm_irq_data[i]);
}
}
} else {
for (i = 0; i < pdata->osi_dma->num_dma_chans; i++) {
chan = pdata->osi_dma->dma_chans[i];
if (pdata->rx_irq_alloc_mask & (OSI_ENABLE << i)) {
devm_free_irq(pdata->dev, pdata->rx_irqs[i],
pdata->rx_napi[chan]);
pdata->rx_irq_alloc_mask &=
(~(OSI_ENABLE << i));
}
if (pdata->tx_irq_alloc_mask & (OSI_ENABLE << i)) {
devm_free_irq(pdata->dev, pdata->tx_irqs[i],
pdata->tx_napi[chan]);
pdata->tx_irq_alloc_mask &=
(~(OSI_ENABLE << i));
}
}
}
}
#if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE)
/**
* @brief IVC ISR Routine
*
* Algorithm: IVC routine to handle common interrupt.
* 1) Verify if IVC channel is readable
* 2) Read IVC msg
* 3) Schedule ivc_work
*
* @param[in] irq: IRQ number.
* @param[in] data: Private data from ISR.
*
* @note MAC and PHY need to be initialized.
*
* @retval IRQ_HANDLED on success
* @retval IRQ_NONE on failure.
*/
static irqreturn_t ether_ivc_irq(int irq, void *data)
{
struct ether_priv_data *pdata = data;
int ret;
if (tegra_hv_ivc_channel_notified(pdata->ivck) != 0) {
dev_err(pdata->dev, "ivc channel not usable\n");
return IRQ_HANDLED;
}
if (tegra_hv_ivc_can_read(pdata->ivck)) {
dev_info(pdata->dev, "ivc read done\n");
/* Read the current message for the ethernet server to be
* able to send further messages on next interrupt
*/
ret = tegra_hv_ivc_read(pdata->ivck, pdata->ivc_rx,
ETHER_MAX_IVC_BUF);
if (ret < 0) {
dev_err(pdata->dev, "IVC read failed: %d\n", ret);
} else {
/* Schedule work to execute the common IRQ Function
* which takes the appropriate action.
*/
schedule_work(&pdata->ivc_work);
}
} else {
dev_info(pdata->dev, "Can not read ivc channel: %d\n",
pdata->ivck->irq);
}
return IRQ_HANDLED;
}
/**
* @brief IVC work
*
* Algorithm: Invoke OSI layer to handle common interrupt.
*
* @param[in] work: work structure.
*
*
* @retval void
*/
static void ether_ivc_work(struct work_struct *work)
{
struct ether_priv_data *pdata =
container_of(work, struct ether_priv_data, ivc_work);
osi_common_isr(pdata->osi_core);
}
/**
* @Register IVC
*
* Algorithm: routine initializes IVC for common IRQ
*
* @param[in] pdata: OS dependent private data structure.
*
* @note IVC number need to be known.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_init_ivc(struct ether_priv_data *pdata)
{
struct device *dev = pdata->dev;
struct device_node *np, *hv_np;
uint32_t id;
int ret;
np = dev->of_node;
if (!np) {
return -EINVAL;
}
hv_np = of_parse_phandle(np, "ivc", 0);
if (!hv_np) {
return -EINVAL;
}
ret = of_property_read_u32_index(np, "ivc", 1, &id);
if (ret) {
dev_err(dev, "ivc_init: Error in reading IVC DT\n");
of_node_put(hv_np);
return -EINVAL;
}
pdata->ivck = tegra_hv_ivc_reserve(hv_np, id, NULL);
of_node_put(hv_np);
if (IS_ERR_OR_NULL(pdata->ivck)) {
dev_err(dev, "Failed to reserve ivc channel:%u\n", id);
ret = PTR_ERR(pdata->ivck);
pdata->ivck = NULL;
return ret;
}
dev_info(dev, "Reserved IVC channel #%u - frame_size=%d irq %d\n",
id, pdata->ivck->frame_size, pdata->ivck->irq);
tegra_hv_ivc_channel_reset(pdata->ivck);
INIT_WORK(&pdata->ivc_work, ether_ivc_work);
ret = devm_request_irq(dev, pdata->ivck->irq, ether_ivc_irq,
0, dev_name(dev), pdata);
if (ret) {
dev_err(dev, "Unable to request irq(%d)\n", pdata->ivck->irq);
tegra_hv_ivc_unreserve(pdata->ivck);
return ret;
}
return 0;
}
#endif
/**
* @brief Register IRQs
*
* Algorithm: This routine takes care of requesting below IRQs
* 1) Common IRQ
* 2) TX IRQ
* 3) RX IRQ
*
* @param[in] pdata: OS dependent private data structure.
*
* @note IRQ numbers need to be known.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_request_irqs(struct ether_priv_data *pdata)
{
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct osi_core_priv_data *osi_core = pdata->osi_core;
static char irq_names[ETHER_IRQ_MAX_IDX][ETHER_IRQ_NAME_SZ] = {0};
int ret = 0, i, j = 0;
unsigned int chan;
ret = devm_request_irq(pdata->dev, (unsigned int)pdata->common_irq,
ether_common_isr, IRQF_SHARED,
"ether_common_irq", pdata);
if (unlikely(ret < 0)) {
dev_err(pdata->dev, "failed to register common interrupt: %d\n",
pdata->common_irq);
return ret;
}
pdata->common_irq_alloc_mask = 1;
if (osi_core->mac_ver > OSI_EQOS_MAC_5_00) {
for (i = 0; i < osi_dma->num_vm_irqs; i++) {
snprintf(irq_names[j], ETHER_IRQ_NAME_SZ, "%s.vm%d",
netdev_name(pdata->ndev), i);
ret = devm_request_irq(pdata->dev, pdata->vm_irqs[i],
ether_vm_isr, IRQF_TRIGGER_NONE,
irq_names[j++],
&pdata->vm_irq_data[i]);
if (unlikely(ret < 0)) {
dev_err(pdata->dev,
"failed to request VM IRQ (%d)\n",
pdata->vm_irqs[i]);
goto err_chan_irq;
}
pdata->rx_irq_alloc_mask |= (OSI_ENABLE << i);
}
} else {
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
snprintf(irq_names[j], ETHER_IRQ_NAME_SZ, "%s.rx%d",
netdev_name(pdata->ndev), chan);
ret = devm_request_irq(pdata->dev, pdata->rx_irqs[i],
ether_rx_chan_isr,
IRQF_TRIGGER_NONE,
irq_names[j++],
pdata->rx_napi[chan]);
if (unlikely(ret < 0)) {
dev_err(pdata->dev,
"failed to register Rx chan interrupt: %d\n",
pdata->rx_irqs[i]);
goto err_chan_irq;
}
pdata->rx_irq_alloc_mask |= (OSI_ENABLE << i);
snprintf(irq_names[j], ETHER_IRQ_NAME_SZ, "%s.tx%d",
netdev_name(pdata->ndev), chan);
ret = devm_request_irq(pdata->dev,
(unsigned int)pdata->tx_irqs[i],
ether_tx_chan_isr,
IRQF_TRIGGER_NONE,
irq_names[j++],
pdata->tx_napi[chan]);
if (unlikely(ret < 0)) {
dev_err(pdata->dev,
"failed to register Tx chan interrupt: %d\n",
pdata->tx_irqs[i]);
goto err_chan_irq;
}
pdata->tx_irq_alloc_mask |= (OSI_ENABLE << i);
}
}
return ret;
err_chan_irq:
ether_free_irqs(pdata);
return ret;
}
/**
* @brief Disable NAPI.
*
* Algorithm:
* 1) Wait for scheduled Tx and Rx NAPI to be completed.
* 2) Disable Tx and Rx NAPI for the channels which
* are enabled.
*
* @param[in] pdata: OSD private data structure.
*
* @note NAPI resources need to be allocated as part of probe().
*/
static void ether_napi_disable(struct ether_priv_data *pdata)
{
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
unsigned int chan;
unsigned int i;
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
napi_synchronize(&pdata->tx_napi[chan]->napi);
napi_disable(&pdata->tx_napi[chan]->napi);
napi_synchronize(&pdata->rx_napi[chan]->napi);
napi_disable(&pdata->rx_napi[chan]->napi);
}
}
/**
* @brief Enable NAPI.
*
* Algorithm: Enable Tx and Rx NAPI for the channels which are enabled.
*
* @param[in] pdata: OSD private data structure.
*
* @note NAPI resources need to be allocated as part of probe().
*/
static void ether_napi_enable(struct ether_priv_data *pdata)
{
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
unsigned int chan;
unsigned int i;
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
napi_enable(&pdata->tx_napi[chan]->napi);
napi_enable(&pdata->rx_napi[chan]->napi);
}
}
/**
* @brief Free receive skbs
*
* @param[in] rx_swcx: Rx pkt SW context
* @param[in] dev: device instance associated with driver.
* @param[in] rx_buf_len: Receive buffer length
*/
static void ether_free_rx_skbs(struct osi_rx_swcx *rx_swcx, struct device *dev,
unsigned int rx_buf_len, void *resv_buf_virt_addr)
{
struct osi_rx_swcx *prx_swcx = NULL;
unsigned int i;
for (i = 0; i < RX_DESC_CNT; i++) {
prx_swcx = rx_swcx + i;
if (prx_swcx->buf_virt_addr != NULL) {
if (resv_buf_virt_addr != prx_swcx->buf_virt_addr) {
dma_unmap_single(dev, prx_swcx->buf_phy_addr,
rx_buf_len, DMA_FROM_DEVICE);
dev_kfree_skb_any(prx_swcx->buf_virt_addr);
}
prx_swcx->buf_virt_addr = NULL;
prx_swcx->buf_phy_addr = 0;
}
}
}
/**
* @brief free_rx_dma_resources - Frees allocated Rx DMA resources.
* Algorithm: Release all DMA Rx resources which are allocated as part of
* allocated_rx_dma_ring() API.
*
* @param[in] osi_dma: OSI DMA private data structure.
* @param[in] dev: device instance associated with driver.
*/
static void free_rx_dma_resources(struct osi_dma_priv_data *osi_dma,
struct device *dev)
{
unsigned long rx_desc_size = sizeof(struct osi_rx_desc) * RX_DESC_CNT;
struct osi_rx_ring *rx_ring = NULL;
unsigned int i;
for (i = 0; i < OSI_EQOS_MAX_NUM_CHANS; i++) {
rx_ring = osi_dma->rx_ring[i];
if (rx_ring != NULL) {
if (rx_ring->rx_swcx != NULL) {
ether_free_rx_skbs(rx_ring->rx_swcx, dev,
osi_dma->rx_buf_len,
osi_dma->resv_buf_virt_addr);
kfree(rx_ring->rx_swcx);
}
if (rx_ring->rx_desc != NULL) {
dma_free_coherent(dev, rx_desc_size,
rx_ring->rx_desc,
rx_ring->rx_desc_phy_addr);
}
kfree(rx_ring);
osi_dma->rx_ring[i] = NULL;
rx_ring = NULL;
}
}
}
/**
* @brief Allocate Rx DMA channel ring resources
*
* Algorithm: DMA receive ring will be created for valid channel number.
* Receive ring updates with descriptors and software context associated
* with each receive descriptor.
*
* @param[in] osi_dma: OSI DMA private data structure.
* @param[in] dev: device instance associated with driver.
* @param[in] chan: Rx DMA channel number.
*
* @note Invalid channel need to be updated.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int allocate_rx_dma_resource(struct osi_dma_priv_data *osi_dma,
struct device *dev,
unsigned int chan)
{
unsigned long rx_desc_size;
unsigned long rx_swcx_size;
int ret = 0;
rx_desc_size = sizeof(struct osi_rx_desc) * (unsigned long)RX_DESC_CNT;
rx_swcx_size = sizeof(struct osi_rx_swcx) * (unsigned long)RX_DESC_CNT;
osi_dma->rx_ring[chan] = kzalloc(sizeof(struct osi_rx_ring),
GFP_KERNEL);
if (osi_dma->rx_ring[chan] == NULL) {
dev_err(dev, "failed to allocate Rx ring\n");
return -ENOMEM;
}
osi_dma->rx_ring[chan]->rx_desc = dma_alloc_coherent(dev, rx_desc_size,
(dma_addr_t *)&osi_dma->rx_ring[chan]->rx_desc_phy_addr,
GFP_KERNEL | __GFP_ZERO);
if (osi_dma->rx_ring[chan]->rx_desc == NULL) {
dev_err(dev, "failed to allocate receive descriptor\n");
ret = -ENOMEM;
goto err_rx_desc;
}
osi_dma->rx_ring[chan]->rx_swcx = kzalloc(rx_swcx_size, GFP_KERNEL);
if (osi_dma->rx_ring[chan]->rx_swcx == NULL) {
dev_err(dev, "failed to allocate Rx ring software context\n");
ret = -ENOMEM;
goto err_rx_swcx;
}
return 0;
err_rx_swcx:
dma_free_coherent(dev, rx_desc_size,
osi_dma->rx_ring[chan]->rx_desc,
osi_dma->rx_ring[chan]->rx_desc_phy_addr);
osi_dma->rx_ring[chan]->rx_desc = NULL;
err_rx_desc:
kfree(osi_dma->rx_ring[chan]);
osi_dma->rx_ring[chan] = NULL;
return ret;
}
/**
* @brief Allocate receive buffers for a DMA channel ring
*
* @param[in] pdata: OSD private data.
* @param[in] rx_ring: rxring data structure.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_allocate_rx_buffers(struct ether_priv_data *pdata,
struct osi_rx_ring *rx_ring)
{
unsigned int rx_buf_len = pdata->osi_dma->rx_buf_len;
struct osi_rx_swcx *rx_swcx = NULL;
unsigned int i = 0;
for (i = 0; i < RX_DESC_CNT; i++) {
struct sk_buff *skb = NULL;
dma_addr_t dma_addr = 0;
rx_swcx = rx_ring->rx_swcx + i;
skb = __netdev_alloc_skb_ip_align(pdata->ndev, rx_buf_len,
GFP_KERNEL);
if (unlikely(skb == NULL)) {
dev_err(pdata->dev, "RX skb allocation failed\n");
return -ENOMEM;
}
dma_addr = dma_map_single(pdata->dev, skb->data, rx_buf_len,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(pdata->dev, dma_addr) != 0)) {
dev_err(pdata->dev, "RX skb dma map failed\n");
dev_kfree_skb_any(skb);
return -ENOMEM;
}
rx_swcx->buf_virt_addr = skb;
rx_swcx->buf_phy_addr = dma_addr;
}
return 0;
}
/**
* @brief Allocate Receive DMA channel ring resources.
*
* Algorithm: DMA receive ring will be created for valid channel number
* provided through DT
*
* @param[in] osi_dma: OSI private data structure.
* @param[in] pdata: OSD private data.
*
* @note Invalid channel need to be updated.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_allocate_rx_dma_resources(struct osi_dma_priv_data *osi_dma,
struct ether_priv_data *pdata)
{
unsigned int chan;
unsigned int i;
int ret = 0;
for (i = 0; i < OSI_EQOS_MAX_NUM_CHANS; i++) {
chan = osi_dma->dma_chans[i];
if (chan != OSI_INVALID_CHAN_NUM) {
ret = allocate_rx_dma_resource(osi_dma, pdata->dev,
chan);
if (ret != 0) {
goto exit;
}
ret = ether_allocate_rx_buffers(pdata,
osi_dma->rx_ring[chan]);
if (ret < 0) {
goto exit;
}
}
}
return 0;
exit:
free_rx_dma_resources(osi_dma, pdata->dev);
return ret;
}
/**
* @brief Frees allocated DMA resources.
*
* Algorithm: Release all DMA Tx resources which are allocated as part of
* allocated_tx_dma_ring() API.
*
* @param[in] osi_dma: OSI private data structure.
* @param[in] dev: device instance associated with driver.
*/
static void free_tx_dma_resources(struct osi_dma_priv_data *osi_dma,
struct device *dev)
{
unsigned long tx_desc_size = sizeof(struct osi_tx_desc) * TX_DESC_CNT;
struct osi_tx_ring *tx_ring = NULL;
unsigned int i;
for (i = 0; i < OSI_EQOS_MAX_NUM_CHANS; i++) {
tx_ring = osi_dma->tx_ring[i];
if (tx_ring != NULL) {
if (tx_ring->tx_swcx != NULL) {
kfree(tx_ring->tx_swcx);
}
if (tx_ring->tx_desc != NULL) {
dma_free_coherent(dev, tx_desc_size,
tx_ring->tx_desc,
tx_ring->tx_desc_phy_addr);
}
kfree(tx_ring);
tx_ring = NULL;
osi_dma->tx_ring[i] = NULL;
}
}
}
/**
* @brief Allocate Tx DMA ring
*
* Algorithm: DMA transmit ring will be created for valid channel number.
* Transmit ring updates with descriptors and software context associated
* with each transmit descriptor.
*
* @param[in] osi_dma: OSI DMA private data structure.
* @param[in] dev: device instance associated with driver.
* @param[in] chan: Channel number.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int allocate_tx_dma_resource(struct osi_dma_priv_data *osi_dma,
struct device *dev,
unsigned int chan)
{
unsigned long tx_desc_size;
unsigned long tx_swcx_size;
int ret = 0;
tx_desc_size = sizeof(struct osi_tx_desc) * (unsigned long)TX_DESC_CNT;
tx_swcx_size = sizeof(struct osi_tx_swcx) * (unsigned long)TX_DESC_CNT;
osi_dma->tx_ring[chan] = kzalloc(sizeof(struct osi_tx_ring),
GFP_KERNEL);
if (osi_dma->tx_ring[chan] == NULL) {
dev_err(dev, "failed to allocate Tx ring\n");
return -ENOMEM;
}
osi_dma->tx_ring[chan]->tx_desc = dma_alloc_coherent(dev, tx_desc_size,
(dma_addr_t *)&osi_dma->tx_ring[chan]->tx_desc_phy_addr,
GFP_KERNEL | __GFP_ZERO);
if (osi_dma->tx_ring[chan]->tx_desc == NULL) {
dev_err(dev, "failed to allocate transmit descriptor\n");
ret = -ENOMEM;
goto err_tx_desc;
}
osi_dma->tx_ring[chan]->tx_swcx = kzalloc(tx_swcx_size, GFP_KERNEL);
if (osi_dma->tx_ring[chan]->tx_swcx == NULL) {
dev_err(dev, "failed to allocate Tx ring software context\n");
ret = -ENOMEM;
goto err_tx_swcx;
}
return 0;
err_tx_swcx:
dma_free_coherent(dev, tx_desc_size,
osi_dma->tx_ring[chan]->tx_desc,
osi_dma->tx_ring[chan]->tx_desc_phy_addr);
osi_dma->tx_ring[chan]->tx_desc = NULL;
err_tx_desc:
kfree(osi_dma->tx_ring[chan]);
osi_dma->tx_ring[chan] = NULL;
return ret;
}
/**
* @brief Allocate Tx DMA resources.
*
* Algorithm: DMA transmit ring will be created for valid channel number
* provided through DT
*
* @param[in] osi_dma: OSI DMA private data structure.
* @param[in] dev: device instance associated with driver.
*
* @note Invalid channel need to be updated.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_allocate_tx_dma_resources(struct osi_dma_priv_data *osi_dma,
struct device *dev)
{
unsigned int chan;
unsigned int i;
int ret = 0;
for (i = 0; i < OSI_EQOS_MAX_NUM_CHANS; i++) {
chan = osi_dma->dma_chans[i];
if (chan != OSI_INVALID_CHAN_NUM) {
ret = allocate_tx_dma_resource(osi_dma, dev, chan);
if (ret != 0) {
goto exit;
}
}
}
return 0;
exit:
free_tx_dma_resources(osi_dma, dev);
return ret;
}
/**
* @brief Updates invalid channels list and DMA rings.
*
* Algorithm: Initialize all DMA Tx/Rx pointers to NULL so that for valid
* dma_addr_t *channels Tx/Rx rings will be created.
*
* For ex: If the number of channels are 2 (nvidia,num_dma_chans = <2>)
* and channel numbers are 2 and 3 (nvidia,dma_chans = <2 3>),
* then only for channel 2 and 3 DMA rings will be allocated in
* allocate_tx/rx_dma_resources() function.
*
* @param[in] osi_dma: OSI DMA private data structure.
*
* @note OSD needs to be update number of channels and channel
* numbers in OSI private data structure.
*/
static void ether_init_invalid_chan_ring(struct osi_dma_priv_data *osi_dma)
{
unsigned int i;
for (i = 0; i < OSI_EQOS_MAX_NUM_CHANS; i++) {
osi_dma->tx_ring[i] = NULL;
osi_dma->rx_ring[i] = NULL;
}
for (i = osi_dma->num_dma_chans; i < OSI_EQOS_MAX_NUM_CHANS; i++) {
osi_dma->dma_chans[i] = OSI_INVALID_CHAN_NUM;
}
}
/**
* @brief Frees allocated DMA resources.
*
* Algorithm: Frees all DMA resources which are allocates with
* allocate_dma_resources() API. Unmap reserved DMA and free
* reserve sk buffer.
*
* @param[in] pdata: OSD private data structure.
*/
void free_dma_resources(struct ether_priv_data *pdata)
{
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct device *dev = pdata->dev;
free_tx_dma_resources(osi_dma, dev);
free_rx_dma_resources(osi_dma, dev);
/* unmap reserved DMA*/
if (osi_dma->resv_buf_phy_addr) {
dma_unmap_single(dev, osi_dma->resv_buf_phy_addr,
osi_dma->rx_buf_len,
DMA_FROM_DEVICE);
osi_dma->resv_buf_phy_addr = 0;
}
/* free reserve buffer */
if (osi_dma->resv_buf_virt_addr) {
dev_kfree_skb_any(osi_dma->resv_buf_virt_addr);
osi_dma->resv_buf_virt_addr = NULL;
}
}
/**
* @brief Allocate DMA resources for Tx and Rx.
*
* Algorithm:
* 1) Allocate Reserved buffer memory
* 2) Allocate Tx DMA resources.
* 3) Allocate Rx DMA resources.
*
* @param[in] pdata: OSD private data structure.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_allocate_dma_resources(struct ether_priv_data *pdata)
{
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct sk_buff *skb = NULL;
int ret = 0;
ether_init_invalid_chan_ring(osi_dma);
skb = __netdev_alloc_skb_ip_align(pdata->ndev, osi_dma->rx_buf_len,
GFP_KERNEL);
if (unlikely(skb == NULL)) {
dev_err(pdata->dev, "Reserve RX skb allocation failed\n");
ret = -ENOMEM;
goto error_alloc;
}
osi_dma->resv_buf_phy_addr = dma_map_single(pdata->dev,
skb->data,
osi_dma->rx_buf_len,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(pdata->dev, osi_dma->resv_buf_phy_addr)
!= 0)) {
dev_err(pdata->dev, "Reserve RX skb dma map failed\n");
ret = -ENOMEM;
goto error_alloc;
}
ret = ether_allocate_tx_dma_resources(osi_dma, pdata->dev);
if (ret != 0) {
goto error_alloc;
}
ret = ether_allocate_rx_dma_resources(osi_dma, pdata);
if (ret != 0) {
free_tx_dma_resources(osi_dma, pdata->dev);
goto error_alloc;
}
osi_dma->resv_buf_virt_addr = (void *)skb;
return ret;
error_alloc:
if (skb != NULL) {
dev_kfree_skb_any(skb);
}
osi_dma->resv_buf_virt_addr = NULL;
osi_dma->resv_buf_phy_addr = 0;
return ret;
}
#ifdef THERMAL_CAL
/**
* @brief Set current thermal state.
*
* Algorithm: Fill the max supported thermal state for ethernet cooling
* device in variable provided by caller.
*
* @param[in] tcd: Ethernet thermal cooling device pointer.
* @param[in] state: Variable to read max thermal state.
*
* @note MAC needs to be out of reset. Once cooling device ops are
* registered, it can be called anytime from kernel. MAC has to be in
* sufficient state to allow pad calibration.
*
* return: 0 - succcess. Does not fail as function is only reading variable.
*/
static int ether_get_max_therm_state(struct thermal_cooling_device *tcd,
unsigned long *state)
{
*state = ETHER_MAX_THERM_STATE;
return 0;
}
/**
* @brief Get current thermal state.
*
* Algorithm: Atomically get the current thermal state of etherent
* cooling device.
*
* @param[in] tcd: Ethernet thermal cooling device pointer.
* @param[in] state: Variable to read current thermal state.
*
* @note MAC needs to be out of reset. Once cooling device ops are
* registered, it can be called anytime from kernel. MAC has to be in
* sufficient state to allow pad calibration.
*
* @return: succcess on 0.
*/
static int ether_get_cur_therm_state(struct thermal_cooling_device *tcd,
unsigned long *state)
{
struct ether_priv_data *pdata = tcd->devdata;
*state = (unsigned long)atomic_read(&pdata->therm_state);
return 0;
}
/**
* @brief Set current thermal state.
*
* Algorithm: Atomically set the desired state provided as argument.
* Trigger pad calibration for each state change.
*
* @param[in] tcd: Ethernet thermal cooling device pointer.
* @param[in] state: The thermal state to set.
*
* @note MAC needs to be out of reset. Once cooling device ops are
* registered, it can be called anytime from kernel. MAC has to be in
* sufficient state to allow pad calibration.
*
* @retval 0 on success
* @retval negative value on failure.
*/
static int ether_set_cur_therm_state(struct thermal_cooling_device *tcd,
unsigned long state)
{
struct ether_priv_data *pdata = tcd->devdata;
struct device *dev = pdata->dev;
/* Thermal framework will take care of making sure state is within
* valid bounds, based on the get_max_state callback. So no need
* to validate bounds again here.
*/
dev_info(dev, "Therm state change from %d to %lu\n",
atomic_read(&pdata->therm_state), state);
atomic_set(&pdata->therm_state, state);
if (osi_pad_calibrate(pdata->osi_core) < 0) {
dev_err(dev, "Therm state changed, failed pad calibration\n");
return -1;
}
return 0;
}
static struct thermal_cooling_device_ops ether_cdev_ops = {
.get_max_state = ether_get_max_therm_state,
.get_cur_state = ether_get_cur_therm_state,
.set_cur_state = ether_set_cur_therm_state,
};
/**
* @brief Register thermal cooling device with kernel.
*
* Algorithm: Register thermal cooling device read from DT. The cooling
* device ops struct passed as argument will be used by thermal framework
* to callback the ethernet driver when temperature trip points are
* triggered, so that ethernet driver can do pad calibration.
*
* @param[in] pdata: Pointer to driver private data structure.
*
* @ote MAC needs to be out of reset. Once cooling device ops are
* registered, it can be called anytime from kernel. MAC has to be in
* sufficient state to allow pad calibration.
*
* @retval 0 on success
* @retval negative value on failure.
*/
static int ether_therm_init(struct ether_priv_data *pdata)
{
struct device_node *np = NULL;
if (pdata->osi_core->pre_si)
return 0;
np = of_find_node_by_name(NULL, "eqos-cool-dev");
if (!np) {
dev_err(pdata->dev, "failed to get eqos-cool-dev\n");
return -ENODEV;
}
pdata->tcd = thermal_of_cooling_device_register(np,
"tegra-eqos", pdata,
ðer_cdev_ops);
if (!pdata->tcd) {
return -ENODEV;
} else if (IS_ERR(pdata->tcd)) {
return PTR_ERR(pdata->tcd);
}
return 0;
}
#endif /* THERMAL_CAL */
/**
* @brief Initialize default EEE LPI configurations
*
* Algorithm: Update the defalt configuration/timers for EEE LPI in driver
* private data structure
*
* @param[in] pdata: OSD private data.
*/
static inline void ether_init_eee_params(struct ether_priv_data *pdata)
{
if (pdata->hw_feat.eee_sel) {
pdata->eee_enabled = OSI_ENABLE;
} else {
pdata->eee_enabled = OSI_DISABLE;
}
pdata->tx_lpi_enabled = pdata->eee_enabled;
pdata->eee_active = OSI_DISABLE;
pdata->tx_lpi_timer = OSI_DEFAULT_TX_LPI_TIMER;
}
/**
* @brief Call back to handle bring up of Ethernet interface
*
* Algorithm: This routine takes care of below
* 1) PHY initialization
* 2) request tx/rx/common irqs
* 3) HW initialization
* 4) OSD private data structure initialization
* 5) Starting the PHY
*
* @param[in] dev: Net device data structure.
*
* @note Ethernet driver probe need to be completed successfully
* with ethernet network device created.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_open(struct net_device *dev)
{
struct ether_priv_data *pdata = netdev_priv(dev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret = 0;
/* Reset the PHY */
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, 0);
usleep_range(10, 11);
gpio_set_value(pdata->phy_reset, 1);
}
ret = ether_enable_clks(pdata);
if (ret < 0) {
dev_err(&dev->dev, "failed to enable clks\n");
return ret;
}
if (pdata->mac_rst && !osi_core->pre_si) {
ret = reset_control_reset(pdata->mac_rst);
if (ret < 0) {
dev_err(&dev->dev, "failed to reset MAC HW\n");
goto err_mac_rst;
}
}
ret = osi_poll_for_mac_reset_complete(osi_core);
if (ret < 0) {
dev_err(&dev->dev, "failed to poll MAC Software reset\n");
goto err_poll_swr;
}
/* PHY reset and initialization */
ret = ether_phy_init(dev);
if (ret < 0) {
dev_err(&dev->dev, "%s: Cannot attach to PHY (error: %d)\n",
__func__, ret);
goto err_phy_init;
}
osi_set_rx_buf_len(pdata->osi_dma);
ret = ether_allocate_dma_resources(pdata);
if (ret < 0) {
dev_err(pdata->dev, "failed to allocate DMA resources\n");
goto err_alloc;
}
#ifdef THERMAL_CAL
atomic_set(&pdata->therm_state, 0);
ret = ether_therm_init(pdata);
if (ret < 0) {
dev_err(pdata->dev, "Failed to register cooling device (%d)\n",
ret);
goto err_therm;
}
#endif /* THERMAL_CAL */
/* initialize MAC/MTL/DMA Common registers */
ret = osi_hw_core_init(pdata->osi_core,
pdata->hw_feat.tx_fifo_size,
pdata->hw_feat.rx_fifo_size);
if (ret < 0) {
dev_err(pdata->dev,
"%s: failed to initialize MAC HW core with reason %d\n",
__func__, ret);
goto err_hw_init;
}
/* DMA init */
ret = osi_hw_dma_init(pdata->osi_dma);
if (ret < 0) {
dev_err(pdata->dev,
"%s: failed to initialize MAC HW DMA with reason %d\n",
__func__, ret);
goto err_hw_init;
}
/* As all registers reset as part of ether_close(), reset private
* structure variable as well */
pdata->vlan_hash_filtering = OSI_PERFECT_FILTER_MODE;
pdata->l2_filtering_mode = OSI_PERFECT_FILTER_MODE;
/* Initialize PTP */
ret = ether_ptp_init(pdata);
if (ret < 0) {
dev_err(pdata->dev,
"%s:failed to initialize PTP with reason %d\n",
__func__, ret);
goto err_hw_init;
}
/* Enable napi before requesting irq to be ready to handle it */
ether_napi_enable(pdata);
/* request tx/rx/common irq */
ret = ether_request_irqs(pdata);
if (ret < 0) {
dev_err(&dev->dev,
"%s: failed to get tx rx irqs with reason %d\n",
__func__, ret);
goto err_r_irq;
}
/* Init EEE configuration */
ether_init_eee_params(pdata);
/* Start the MAC */
osi_start_mac(pdata->osi_core);
/* start PHY */
phy_start(pdata->phydev);
/* start network queues */
netif_tx_start_all_queues(pdata->ndev);
/* call function to schedule workqueue */
ether_stats_work_queue_start(pdata);
return ret;
err_r_irq:
ether_napi_disable(pdata);
ether_ptp_remove(pdata);
err_hw_init:
#ifdef THERMAL_CAL
thermal_cooling_device_unregister(pdata->tcd);
err_therm:
#endif /* THERMAL_CAL */
free_dma_resources(pdata);
err_alloc:
if (pdata->phydev) {
phy_disconnect(pdata->phydev);
}
err_phy_init:
err_poll_swr:
if (!osi_core->pre_si && pdata->mac_rst) {
reset_control_assert(pdata->mac_rst);
}
err_mac_rst:
ether_disable_clks(pdata);
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, OSI_DISABLE);
}
return ret;
}
/**
* @brief Helper function to clear the sw stats structures.
*
* Algorithm: This routine clears the following sw stats structures.
* 1) struct osi_mmc_counters
* 2) struct osi_xtra_stat_counters
* 3) struct osi_xtra_dma_stat_counters
* 4) struct osi_pkt_err_stats
*
* @param[in] pdata: Pointer to OSD private data structure.
*
* @note This routine is invoked when interface is going down, not for suspend.
*/
static inline void ether_reset_stats(struct ether_priv_data *pdata)
{
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
memset(&osi_core->mmc, 0U, sizeof(struct osi_mmc_counters));
memset(&osi_core->xstats, 0U,
sizeof(struct osi_xtra_stat_counters));
memset(&osi_dma->dstats, 0U,
sizeof(struct osi_xtra_dma_stat_counters));
memset(&osi_dma->pkt_err_stats, 0U, sizeof(struct osi_pkt_err_stats));
}
/**
* @brief Call back to handle bring down of Ethernet interface
*
* Algorithm: This routine takes care of below
* 1) Stopping PHY
* 2) Freeing tx/rx/common irqs
*
* @param[in] ndev: Net device data structure.
*
* @note MAC Interface need to be registered.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_close(struct net_device *ndev)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
int ret = 0, i;
unsigned int chan = 0x0;
/* Unregister broadcasting MAC timestamp to clients */
tegra_unregister_hwtime_source();
/* Stop workqueue to get further scheduled */
ether_stats_work_queue_stop(pdata);
/* Stop and disconnect the PHY */
if (pdata->phydev != NULL) {
/* Check and clear WoL status */
if (device_may_wakeup(&ndev->dev)) {
if (disable_irq_wake(pdata->phydev->irq)) {
dev_warn(pdata->dev,
"PHY disable irq wake fail\n");
}
device_init_wakeup(&ndev->dev, false);
}
phy_stop(pdata->phydev);
phy_disconnect(pdata->phydev);
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, 0);
}
pdata->phydev = NULL;
}
/* turn off sources of data into dev */
netif_tx_disable(pdata->ndev);
/* Free tx rx and common irqs */
ether_free_irqs(pdata);
/* Cancel hrtimer */
for (i = 0; i < pdata->osi_dma->num_dma_chans; i++) {
chan = pdata->osi_dma->dma_chans[i];
if (atomic_read(&pdata->tx_napi[chan]->tx_usecs_timer_armed)
== OSI_ENABLE) {
hrtimer_cancel(&pdata->tx_napi[chan]->tx_usecs_timer);
}
}
/* DMA De init */
osi_hw_dma_deinit(pdata->osi_dma);
#ifdef THERMAL_CAL
thermal_cooling_device_unregister(pdata->tcd);
#endif /* THERMAL_CAL */
ether_napi_disable(pdata);
/* free DMA resources after DMA stop */
free_dma_resources(pdata);
/* PTP de-init */
ether_ptp_remove(pdata);
/* MAC deinit which inturn stop MAC Tx,Rx */
osi_hw_core_deinit(pdata->osi_core);
/* Assert MAC RST gpio */
if (!pdata->osi_core->pre_si && pdata->mac_rst) {
reset_control_assert(pdata->mac_rst);
}
/* Disable clock */
ether_disable_clks(pdata);
/* Reset stats since interface is going down */
ether_reset_stats(pdata);
return ret;
}
/**
* @brief Helper function to check if TSO is used in given skb.
*
* Algorithm:
* 1) Check if driver received a TSO/LSO/GSO packet
* 2) If so, store the packet details like MSS(Maximum Segment Size),
* packet header length, packet payload length, tcp/udp header length.
*
* @param[in] tx_pkt_cx: Pointer to packet context information structure.
* @param[in] skb: socket buffer.
*
* @retval 0 if not a TSO packet
* @retval 1 on success
* @retval "negative value" on failure.
*/
static int ether_handle_tso(struct osi_tx_pkt_cx *tx_pkt_cx,
struct sk_buff *skb)
{
int ret = 1;
if (skb_is_gso(skb) == 0) {
return 0;
}
if (skb_header_cloned(skb)) {
ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
if (ret) {
return ret;
}
}
/* Start filling packet details in Tx_pkt_cx */
if (skb_shinfo(skb)->gso_type & (SKB_GSO_UDP)) {
tx_pkt_cx->tcp_udp_hdrlen = sizeof(struct udphdr);
tx_pkt_cx->mss = skb_shinfo(skb)->gso_size -
sizeof(struct udphdr);
} else {
tx_pkt_cx->tcp_udp_hdrlen = tcp_hdrlen(skb);
tx_pkt_cx->mss = skb_shinfo(skb)->gso_size;
}
tx_pkt_cx->total_hdrlen = skb_transport_offset(skb) +
tx_pkt_cx->tcp_udp_hdrlen;
tx_pkt_cx->payload_len = (skb->len - tx_pkt_cx->total_hdrlen);
netdev_dbg(skb->dev, "mss =%u\n", tx_pkt_cx->mss);
netdev_dbg(skb->dev, "payload_len =%u\n", tx_pkt_cx->payload_len);
netdev_dbg(skb->dev, "tcp_udp_hdrlen=%u\n", tx_pkt_cx->tcp_udp_hdrlen);
netdev_dbg(skb->dev, "total_hdrlen =%u\n", tx_pkt_cx->total_hdrlen);
return ret;
}
/**
* @brief Tx ring software context allocation.
*
* Algorithm:
* 1) Map skb data buffer to DMA mappable address.
* 2) Updated dma address, len and buffer address. This info will be used
* OSI layer for data transmission and buffer cleanup.
*
* @param[in] dev: device instance associated with driver.
* @param[in] tx_ring: Tx ring instance associated with channel number.
* @param[in] skb: socket buffer.
*
* @retval "number of descriptors" on success
* @retval "negative value" on failure.
*/
static int ether_tx_swcx_alloc(struct device *dev,
struct osi_tx_ring *tx_ring,
struct sk_buff *skb)
{
struct osi_tx_pkt_cx *tx_pkt_cx = &tx_ring->tx_pkt_cx;
unsigned int cur_tx_idx = tx_ring->cur_tx_idx;
struct osi_tx_swcx *tx_swcx = NULL;
unsigned int len = 0, offset = 0, size = 0;
int cnt = 0, ret = 0, i, num_frags;
#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
skb_frag_t *frag;
#else
struct skb_frag_struct *frag;
#endif
unsigned int page_idx, page_offset;
unsigned int max_data_len_per_txd = (unsigned int)
ETHER_TX_MAX_BUFF_SIZE;
memset(tx_pkt_cx, 0, sizeof(*tx_pkt_cx));
ret = ether_handle_tso(tx_pkt_cx, skb);
if (unlikely(ret < 0)) {
dev_err(dev, "Unable to handle TSO packet (%d)\n", ret);
/* Caller will take care of consuming skb */
return ret;
}
if (ret == 0) {
dev_dbg(dev, "Not a TSO packet\n");
if (skb->ip_summed == CHECKSUM_PARTIAL) {
tx_pkt_cx->flags |= OSI_PKT_CX_CSUM;
}
} else {
tx_pkt_cx->flags |= OSI_PKT_CX_TSO;
}
if (unlikely(skb_vlan_tag_present(skb))) {
tx_pkt_cx->vtag_id = skb_vlan_tag_get(skb);
tx_pkt_cx->vtag_id |= (skb->priority << VLAN_PRIO_SHIFT);
tx_pkt_cx->flags |= OSI_PKT_CX_VLAN;
}
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
tx_pkt_cx->flags |= OSI_PKT_CX_PTP;
}
if (((tx_pkt_cx->flags & OSI_PKT_CX_VLAN) == OSI_PKT_CX_VLAN) ||
((tx_pkt_cx->flags & OSI_PKT_CX_TSO) == OSI_PKT_CX_TSO)) {
tx_swcx = tx_ring->tx_swcx + cur_tx_idx;
if (tx_swcx->len) {
return 0;
}
tx_swcx->len = -1;
cnt++;
INCR_TX_DESC_INDEX(cur_tx_idx, 1U);
}
if ((tx_pkt_cx->flags & OSI_PKT_CX_TSO) == OSI_PKT_CX_TSO) {
/* For TSO map the header in separate desc. */
len = tx_pkt_cx->total_hdrlen;
} else {
len = skb_headlen(skb);
}
/* Map the linear buffers from the skb first.
* For TSO only upto TCP header is filled in first desc.
*/
while (valid_tx_len(len)) {
tx_swcx = tx_ring->tx_swcx + cur_tx_idx;
if (unlikely(tx_swcx->len)) {
goto desc_not_free;
}
size = min(len, max_data_len_per_txd);
tx_swcx->buf_phy_addr = dma_map_single(dev,
skb->data + offset,
size,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev,
tx_swcx->buf_phy_addr))) {
dev_err(dev, "failed to map Tx buffer\n");
ret = -ENOMEM;
goto dma_map_failed;
}
tx_swcx->is_paged_buf = 0;
tx_swcx->len = size;
len -= size;
offset += size;
cnt++;
INCR_TX_DESC_INDEX(cur_tx_idx, 1U);
}
/* Map remaining payload from linear buffer
* to subsequent descriptors in case of TSO
*/
if ((tx_pkt_cx->flags & OSI_PKT_CX_TSO) == OSI_PKT_CX_TSO) {
len = skb_headlen(skb) - tx_pkt_cx->total_hdrlen;
while (valid_tx_len(len)) {
tx_swcx = tx_ring->tx_swcx + cur_tx_idx;
if (unlikely(tx_swcx->len)) {
goto desc_not_free;
}
size = min(len, max_data_len_per_txd);
tx_swcx->buf_phy_addr = dma_map_single(dev,
skb->data + offset,
size,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev,
tx_swcx->buf_phy_addr))) {
dev_err(dev, "failed to map Tx buffer\n");
ret = -ENOMEM;
goto dma_map_failed;
}
tx_swcx->is_paged_buf = 0;
tx_swcx->len = size;
len -= size;
offset += size;
cnt++;
INCR_TX_DESC_INDEX(cur_tx_idx, 1U);
}
}
/* Process fragmented skb's */
num_frags = skb_shinfo(skb)->nr_frags;
for (i = 0; i < num_frags; i++) {
offset = 0;
frag = &skb_shinfo(skb)->frags[i];
len = skb_frag_size(frag);
while (valid_tx_len(len)) {
tx_swcx = tx_ring->tx_swcx + cur_tx_idx;
if (unlikely(tx_swcx->len)) {
goto desc_not_free;
}
size = min(len, max_data_len_per_txd);
#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
page_idx = (frag->bv_offset + offset) >> PAGE_SHIFT;
page_offset = (frag->bv_offset + offset) & ~PAGE_MASK;
#else
page_idx = (frag->page_offset + offset) >> PAGE_SHIFT;
page_offset = (frag->page_offset + offset) & ~PAGE_MASK;
#endif
tx_swcx->buf_phy_addr = dma_map_page(dev,
#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
(frag->bv_page + page_idx),
#else
(frag->page.p + page_idx),
#endif
page_offset, size,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev,
tx_swcx->buf_phy_addr))) {
dev_err(dev, "failed to map Tx buffer\n");
ret = -ENOMEM;
goto dma_map_failed;
}
tx_swcx->is_paged_buf = 1;
tx_swcx->len = size;
len -= size;
offset += size;
cnt++;
INCR_TX_DESC_INDEX(cur_tx_idx, 1U);
}
}
tx_swcx->buf_virt_addr = skb;
tx_pkt_cx->desc_cnt = cnt;
return cnt;
desc_not_free:
ret = 0;
dma_map_failed:
/* Failed to fill current desc. Rollback previous desc's */
while (cnt > 0) {
DECR_TX_DESC_INDEX(cur_tx_idx, 1U);
tx_swcx = tx_ring->tx_swcx + cur_tx_idx;
if (tx_swcx->buf_phy_addr) {
if (tx_swcx->is_paged_buf) {
dma_unmap_page(dev, tx_swcx->buf_phy_addr,
tx_swcx->len, DMA_TO_DEVICE);
} else {
dma_unmap_single(dev, tx_swcx->buf_phy_addr,
tx_swcx->len, DMA_TO_DEVICE);
}
tx_swcx->buf_phy_addr = 0;
}
tx_swcx->len = 0;
tx_swcx->is_paged_buf = 0;
cnt--;
}
return ret;
}
/**
* @brief Select queue based on user priority
*
* Algorithm:
* 1) Select the correct queue index based which has priority of queue
* same as skb->priority
* 2) default select queue array index 0
*
* @param[in] dev: Network device pointer
* @param[in] skb: sk_buff pointer, buffer data to send
* @param[in] accel_priv: private data used for L2 forwarding offload
* @param[in] fallback: fallback function pointer
*
* @retval "transmit queue index"
*/
static unsigned short ether_select_queue(struct net_device *dev,
struct sk_buff *skb,
#if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE)
void *accel_priv,
select_queue_fallback_t fallback)
#else
struct net_device *sb_dev)
#endif
{
struct ether_priv_data *pdata = netdev_priv(dev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
unsigned short txqueue_select = 0;
unsigned int i, mtlq;
u16 vlan_tci;
unsigned int priority = skb->priority;
if (vlan_get_tag(skb, &vlan_tci) == 0) {
priority = (vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
}
for (i = 0; i < osi_core->num_mtl_queues; i++) {
mtlq = osi_core->mtl_queues[i];
if (pdata->txq_prio[mtlq] == priority) {
txqueue_select = (unsigned short)i;
break;
}
}
return txqueue_select;
}
/**
* @brief Network layer hook for data transmission.
*
* Algorithm:
* 1) Allocate software context (DMA address for the buffer) for the data.
* 2) Invoke OSI for data transmission.
*
* @param[in] skb: SKB data structure.
* @param[in] ndev: Net device structure.
*
* @note MAC and PHY need to be initialized.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
unsigned int qinx = skb_get_queue_mapping(skb);
unsigned int chan = osi_dma->dma_chans[qinx];
struct osi_tx_ring *tx_ring = osi_dma->tx_ring[chan];
int count = 0;
count = ether_tx_swcx_alloc(pdata->dev, tx_ring, skb);
if (count <= 0) {
if (count == 0) {
netif_stop_subqueue(ndev, qinx);
netdev_err(ndev, "Tx ring[%d] is full\n", chan);
return NETDEV_TX_BUSY;
}
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
osi_hw_transmit(osi_dma, chan);
if (ether_avail_txdesc_cnt(tx_ring) <= ETHER_TX_DESC_THRESHOLD) {
netif_stop_subqueue(ndev, qinx);
netdev_dbg(ndev, "Tx ring[%d] insufficient desc.\n", chan);
}
if (osi_dma->use_tx_usecs == OSI_ENABLE &&
atomic_read(&pdata->tx_napi[chan]->tx_usecs_timer_armed) ==
OSI_DISABLE) {
atomic_set(&pdata->tx_napi[chan]->tx_usecs_timer_armed,
OSI_ENABLE);
hrtimer_start(&pdata->tx_napi[chan]->tx_usecs_timer,
osi_dma->tx_usecs * NSEC_PER_USEC,
HRTIMER_MODE_REL);
}
return NETDEV_TX_OK;
}
/**
* @brief Function to configure the multicast address in device.
*
* Algorithm: This function collects all the multicast addresses and updates the
* device.
*
* @param[in] dev: Pointer to net_device structure.
*
* @note MAC and PHY need to be initialized.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_prepare_mc_list(struct net_device *dev,
struct osi_filter *filter)
{
struct ether_priv_data *pdata = netdev_priv(dev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct netdev_hw_addr *ha;
unsigned int i = 1;
int ret = -1;
if (filter == NULL) {
dev_err(pdata->dev, "filter is NULL\n");
return ret;
}
memset(filter, 0x0, sizeof(struct osi_filter));
if (pdata->l2_filtering_mode == OSI_HASH_FILTER_MODE) {
dev_err(pdata->dev,
"HASH FILTERING for mc addresses not Supported in SW\n");
filter->oper_mode = (OSI_OPER_EN_PERFECT |
OSI_OPER_DIS_PROMISC |
OSI_OPER_DIS_ALLMULTI);
return osi_l2_filter(osi_core, filter);
/* address 0 is used for DUT DA so compare with
* pdata->num_mac_addr_regs - 1
*/
} else if (netdev_mc_count(dev) > (pdata->num_mac_addr_regs - 1)) {
/* switch to PROMISCUOUS mode */
filter->oper_mode = (OSI_OPER_DIS_PERFECT |
OSI_OPER_EN_PROMISC |
OSI_OPER_DIS_ALLMULTI);
dev_dbg(pdata->dev, "enabling Promiscuous mode\n");
return osi_l2_filter(osi_core, filter);
} else {
dev_dbg(pdata->dev,
"select PERFECT FILTERING for mc addresses, mc_count = %d, num_mac_addr_regs = %d\n",
netdev_mc_count(dev), pdata->num_mac_addr_regs);
filter->oper_mode = (OSI_OPER_EN_PERFECT |
OSI_OPER_ADDR_UPDATE |
OSI_OPER_DIS_PROMISC |
OSI_OPER_DIS_ALLMULTI);
netdev_for_each_mc_addr(ha, dev) {
dev_dbg(pdata->dev,
"mc addr[%d] = %#x:%#x:%#x:%#x:%#x:%#x\n",
i, ha->addr[0], ha->addr[1], ha->addr[2],
ha->addr[3], ha->addr[4], ha->addr[5]);
filter->index = i;
filter->mac_address = ha->addr;
filter->dma_routing = OSI_DISABLE;
filter->dma_chan = 0x0;
filter->addr_mask = OSI_AMASK_DISABLE;
filter->src_dest = OSI_DA_MATCH;
ret = osi_l2_filter(osi_core, filter);
if (ret < 0) {
dev_err(pdata->dev, "issue in creating mc list\n");
pdata->last_filter_index = i - 1;
return ret;
}
if (i == EQOS_MAX_MAC_ADDRESS_FILTER - 1) {
dev_err(pdata->dev, "Configured max number of supported MAC, ignoring it\n");
break;
}
i++;
}
/* preserve last filter index to pass on to UC */
pdata->last_filter_index = i - 1;
}
return ret;
}
/**
* @brief Function to configure the unicast address
* in device.
*
* Algorithm: This function collects all the unicast addresses and updates the
* device.
*
* @param[in] dev: pointer to net_device structure.
*
* @note MAC and PHY need to be initialized.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_prepare_uc_list(struct net_device *dev,
struct osi_filter *filter)
{
struct ether_priv_data *pdata = netdev_priv(dev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
/* last valid MC/MAC DA + 1 should be start of UC addresses */
unsigned int i = pdata->last_filter_index + 1;
struct netdev_hw_addr *ha;
int ret = -1;
if (filter == NULL) {
dev_err(pdata->dev, "filter is NULL\n");
return ret;
}
memset(filter, 0x0, sizeof(struct osi_filter));
if (pdata->l2_filtering_mode == OSI_HASH_FILTER_MODE) {
dev_err(pdata->dev,
"HASH FILTERING for uc addresses not Supported in SW\n");
/* Perfect filtering for multicast */
filter->oper_mode = (OSI_OPER_EN_PERFECT |
OSI_OPER_DIS_PROMISC |
OSI_OPER_DIS_ALLMULTI);
return osi_l2_filter(osi_core, filter);
} else if (netdev_uc_count(dev) > (pdata->num_mac_addr_regs - i)) {
/* switch to PROMISCUOUS mode */
filter->oper_mode = (OSI_OPER_DIS_PERFECT |
OSI_OPER_EN_PROMISC |
OSI_OPER_DIS_ALLMULTI);
dev_dbg(pdata->dev, "enabling Promiscuous mode\n");
return osi_l2_filter(osi_core, filter);
} else {
dev_dbg(pdata->dev,
"select PERFECT FILTERING for uc addresses: uc_count = %d\n",
netdev_uc_count(dev));
filter->oper_mode = (OSI_OPER_EN_PERFECT |
OSI_OPER_ADDR_UPDATE |
OSI_OPER_DIS_PROMISC |
OSI_OPER_DIS_ALLMULTI);
netdev_for_each_uc_addr(ha, dev) {
dev_dbg(pdata->dev,
"uc addr[%d] = %#x:%#x:%#x:%#x:%#x:%#x\n",
i, ha->addr[0], ha->addr[1], ha->addr[2],
ha->addr[3], ha->addr[4], ha->addr[5]);
filter->index = i;
filter->mac_address = ha->addr;
filter->dma_routing = OSI_DISABLE;
filter->dma_chan = 0x0;
filter->addr_mask = OSI_AMASK_DISABLE;
filter->src_dest = OSI_DA_MATCH;
ret = osi_l2_filter(osi_core, filter);
if (ret < 0) {
dev_err(pdata->dev, "issue in creating uc list\n");
pdata->last_filter_index = i - 1;
return ret;
}
if (i == EQOS_MAX_MAC_ADDRESS_FILTER - 1) {
dev_err(pdata->dev, "Already MAX MAC added\n");
break;
}
i++;
}
pdata->last_filter_index = i - 1;
}
return ret;
}
/**
* @brief This function is used to set RX mode.
*
* Algorithm: Based on Network interface flag, MAC registers are programmed to
* set mode.
*
* @param[in] dev - pointer to net_device structure.
*
* @note MAC and PHY need to be initialized.
*/
static void ether_set_rx_mode(struct net_device *dev)
{
struct ether_priv_data *pdata = netdev_priv(dev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_filter filter;
/* store last call last_uc_filter_index in temporary variable */
int last_index = pdata->last_filter_index;
int ret = -1;
unsigned int i = 0;
memset(&filter, 0x0, sizeof(struct osi_filter));
if ((dev->flags & IFF_PROMISC) == IFF_PROMISC) {
if (pdata->promisc_mode == OSI_ENABLE) {
filter.oper_mode = (OSI_OPER_DIS_PERFECT |
OSI_OPER_EN_PROMISC |
OSI_OPER_DIS_ALLMULTI);
dev_dbg(pdata->dev, "enabling Promiscuous mode\n");
ret = osi_l2_filter(osi_core, &filter);
if (ret < 0) {
dev_err(pdata->dev,
"Setting Promiscuous mode failed\n");
}
} else {
dev_warn(pdata->dev,
"Promiscuous mode not supported\n");
}
return;
} else if ((dev->flags & IFF_ALLMULTI) == IFF_ALLMULTI) {
filter.oper_mode = (OSI_OPER_EN_ALLMULTI |
OSI_OPER_DIS_PERFECT |
OSI_OPER_DIS_PROMISC);
dev_dbg(pdata->dev, "pass all multicast pkt\n");
ret = osi_l2_filter(osi_core, &filter);
if (ret < 0) {
dev_err(pdata->dev, "Setting All Multicast allow mode failed\n");
}
return;
} else if (!netdev_mc_empty(dev)) {
if (ether_prepare_mc_list(dev, &filter) != 0) {
dev_err(pdata->dev, "Setting MC address failed\n");
}
} else {
pdata->last_filter_index = 0;
}
if (!netdev_uc_empty(dev)) {
if (ether_prepare_uc_list(dev, &filter) != 0) {
dev_err(pdata->dev, "Setting UC address failed\n");
}
}
/* Reset the filter structure to avoid any old value */
memset(&filter, 0x0, sizeof(struct osi_filter));
/* invalidate remaining ealier address */
for (i = pdata->last_filter_index + 1; i <= last_index; i++) {
filter.oper_mode = OSI_OPER_ADDR_UPDATE;
filter.index = i;
filter.mac_address = NULL;
filter.dma_routing = OSI_DISABLE;
filter.dma_chan = OSI_CHAN_ANY;
filter.addr_mask = OSI_AMASK_DISABLE;
filter.src_dest = OSI_DA_MATCH;
ret = osi_l2_filter(osi_core, &filter);
if (ret < 0) {
dev_err(pdata->dev, "Invalidating expired L2 filter failed\n");
return;
}
}
return;
}
/**
* @brief Network stack IOCTL hook to driver
*
* Algorithm:
* 1) Invokes MII API for phy read/write based on IOCTL command
* 2) SIOCDEVPRIVATE for private ioctl
*
* @param[in] dev: network device structure
* @param[in] rq: Interface request structure used for socket
* @param[in] cmd: IOCTL command code
*
* @note Ethernet interface need to be up.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
int ret = -EOPNOTSUPP;
struct ether_priv_data *pdata = netdev_priv(dev);
if (!dev || !rq) {
dev_err(pdata->dev, "%s: Invalid arg\n", __func__);
return -EINVAL;
}
if (!netif_running(dev)) {
dev_err(pdata->dev, "%s: Interface not up\n", __func__);
return -EINVAL;
}
switch (cmd) {
case SIOCGMIIPHY:
case SIOCGMIIREG:
case SIOCSMIIREG:
if (!dev->phydev) {
return -EINVAL;
}
/* generic PHY MII ioctl interface */
ret = phy_mii_ioctl(dev->phydev, rq, cmd);
break;
case SIOCDEVPRIVATE:
ret = ether_handle_priv_ioctl(dev, rq);
break;
case ETHER_PRV_TS_IOCTL:
ret = ether_handle_priv_ts_ioctl(pdata, rq);
break;
case SIOCSHWTSTAMP:
ret = ether_handle_hwtstamp_ioctl(pdata, rq);
break;
default:
netdev_dbg(dev, "%s: Unsupported ioctl %d\n",
__func__, cmd);
break;
}
return ret;
}
/**
* @brief Set MAC address
*
* Algorithm:
* 1) Checks whether given MAC address is valid or not
* 2) Stores the MAC address in OSI core structure
*
* @param[in] ndev: Network device structure
* @param[in] addr: MAC address to be programmed.
*
* @note Ethernet interface need to be down to set MAC address
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_set_mac_addr(struct net_device *ndev, void *addr)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret = 0;
ret = eth_mac_addr(ndev, addr);
if (ret) {
dev_err(pdata->dev, "failed to set MAC address\n");
return ret;
}
/* MAC address programmed in HW registers during osi_hw_core_init() */
memcpy(osi_core->mac_addr, ndev->dev_addr, ETH_ALEN);
return ret;
}
/**
* @brief Change MAC MTU size
*
* Algorithm:
* 1) Check and return if interface is up.
* 2) Stores new MTU size set by user in OSI core data structure.
*
* @param[in] ndev: Network device structure
* @param[in] new_mtu: New MTU size to set.
*
* @note Ethernet interface need to be down to change MTU size
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_change_mtu(struct net_device *ndev, int new_mtu)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
if (netif_running(ndev)) {
netdev_err(pdata->ndev, "must be stopped to change its MTU\n");
return -EBUSY;
}
if (new_mtu > OSI_MTU_SIZE_9000 && osi_dma->num_dma_chans != 1U) {
netdev_err(pdata->ndev,
"MTU greater than %d is valid only in single channel configuration\n"
, OSI_MTU_SIZE_9000);
return -EINVAL;
}
ndev->mtu = new_mtu;
osi_core->mtu = new_mtu;
osi_dma->mtu = new_mtu;
netdev_update_features(ndev);
return 0;
}
/**
* @brief Change HW features for the given network device.
*
* Algorithm:
* 1) Check if HW supports feature requested to be changed
* 2) If supported, check the current status of the feature and if it
* needs to be toggled, do so.
*
* @param[in] ndev: Network device structure
* @param[in] feat: New features to be updated
*
* @note Ethernet interface needs to be up. Stack will enforce
* the check.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_set_features(struct net_device *ndev, netdev_features_t feat)
{
int ret = 0;
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
netdev_features_t hw_feat_cur_state = pdata->hw_feat_cur_state;
if (pdata->hw_feat.rx_coe_sel == 0U) {
return ret;
}
if ((feat & NETIF_F_RXCSUM) == NETIF_F_RXCSUM) {
if (!(hw_feat_cur_state & NETIF_F_RXCSUM)) {
ret = osi_config_rxcsum_offload(osi_core,
OSI_ENABLE);
dev_info(pdata->dev, "Rx Csum offload: Enable: %s\n",
ret ? "Failed" : "Success");
pdata->hw_feat_cur_state |= NETIF_F_RXCSUM;
}
} else {
if ((hw_feat_cur_state & NETIF_F_RXCSUM)) {
ret = osi_config_rxcsum_offload(osi_core,
OSI_DISABLE);
dev_info(pdata->dev, "Rx Csum offload: Disable: %s\n",
ret ? "Failed" : "Success");
pdata->hw_feat_cur_state &= ~NETIF_F_RXCSUM;
}
}
return ret;
}
/**
* @brief Adds VLAN ID. This function is invoked by upper
* layer when a new VLAN id is registered. This function updates the HW
* filter with new VLAN id. New vlan id can be added with vconfig -
* vconfig add interface_name vlan_id
*
* Algorithm:
* 1) Check for hash or perfect filtering.
* 2) invoke osi call accordingly.
*
* @param[in] ndev: Network device structure
* @param[in] vlan_proto: VLAN proto VLAN_PROTO_8021Q = 0 VLAN_PROTO_8021AD = 1
* @param[in] vid: VLAN ID.
*
* @note Ethernet interface should be up
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_vlan_rx_add_vid(struct net_device *ndev, __be16 vlan_proto,
u16 vid)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret = -1;
if (pdata->vlan_hash_filtering == OSI_HASH_FILTER_MODE) {
dev_err(pdata->dev,
"HASH FILTERING for VLAN tag is not supported in SW\n");
} else {
ret = osi_update_vlan_id(osi_core, vid);
}
return ret;
}
/**
* @brief Removes VLAN ID. This function is invoked by
* upper layer when a new VALN id is removed. This function updates the
* HW filter. vlan id can be removed with vconfig -
* vconfig rem interface_name vlan_id
*
* Algorithm:
* 1) Check for hash or perfect filtering.
* 2) invoke osi call accordingly.
*
* @param[in] ndev: Network device structure
* @param[in] vlan_proto: VLAN proto VLAN_PROTO_8021Q = 0 VLAN_PROTO_8021AD = 1
* @param[in] vid: VLAN ID.
*
* @note Ethernet interface should be up
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_vlan_rx_kill_vid(struct net_device *ndev, __be16 vlan_proto,
u16 vid)
{
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret = -1;
if (!netif_running(ndev)) {
return 0;
}
if (pdata->vlan_hash_filtering == OSI_HASH_FILTER_MODE) {
dev_err(pdata->dev,
"HASH FILTERING for VLAN tag is not supported in SW\n");
} else {
/* By default, receive only VLAN pkt with VID = 1 because
* writing 0 will pass all VLAN pkt
*/
ret = osi_update_vlan_id(osi_core, 0x1U);
}
return ret;
}
/**
* @brief Ethernet network device operations
*/
static const struct net_device_ops ether_netdev_ops = {
.ndo_open = ether_open,
.ndo_stop = ether_close,
.ndo_start_xmit = ether_start_xmit,
.ndo_do_ioctl = ether_ioctl,
.ndo_set_mac_address = ether_set_mac_addr,
.ndo_change_mtu = ether_change_mtu,
.ndo_select_queue = ether_select_queue,
.ndo_set_features = ether_set_features,
.ndo_set_rx_mode = ether_set_rx_mode,
.ndo_vlan_rx_add_vid = ether_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = ether_vlan_rx_kill_vid,
};
/**
* @brief NAPI poll handler for receive.
*
* Algorithm: Invokes OSI layer to read data from HW and pass onto the
* Linux network stack.
*
* @param[in] napi: NAPI instance for Rx NAPI.
* @param[in] budget: NAPI budget.
*
* @note Probe and INIT needs to be completed successfully.
*
*@return number of packets received.
*/
static int ether_napi_poll_rx(struct napi_struct *napi, int budget)
{
struct ether_rx_napi *rx_napi =
container_of(napi, struct ether_rx_napi, napi);
struct ether_priv_data *pdata = rx_napi->pdata;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
unsigned int chan = rx_napi->chan;
unsigned int more_data_avail;
unsigned long flags;
int received = 0;
received = osi_process_rx_completions(osi_dma, chan, budget,
&more_data_avail);
if (received < budget) {
napi_complete(napi);
spin_lock_irqsave(&pdata->rlock, flags);
osi_enable_chan_rx_intr(osi_dma, chan);
spin_unlock_irqrestore(&pdata->rlock, flags);
}
return received;
}
/**
* @brief NAPI poll handler for transmission.
*
* Algorithm: Invokes OSI layer to read data from HW and pass onto the
* Linux network stack.
*
* @param[in] napi: NAPI instance for tx NAPI.
* @param[in] budget: NAPI budget.
*
* @note Probe and INIT needs to be completed successfully.
*
* @return Number of Tx buffer cleaned.
*/
static int ether_napi_poll_tx(struct napi_struct *napi, int budget)
{
struct ether_tx_napi *tx_napi =
container_of(napi, struct ether_tx_napi, napi);
struct ether_priv_data *pdata = tx_napi->pdata;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
unsigned int chan = tx_napi->chan;
unsigned long flags;
int processed;
processed = osi_process_tx_completions(osi_dma, chan, budget);
/* re-arm the timer if tx ring is not empty */
if (!osi_txring_empty(osi_dma, chan) &&
osi_dma->use_tx_usecs == OSI_ENABLE &&
atomic_read(&tx_napi->tx_usecs_timer_armed) == OSI_DISABLE) {
atomic_set(&tx_napi->tx_usecs_timer_armed, OSI_ENABLE);
hrtimer_start(&tx_napi->tx_usecs_timer,
osi_dma->tx_usecs * NSEC_PER_USEC,
HRTIMER_MODE_REL);
}
if (processed < budget) {
napi_complete(napi);
spin_lock_irqsave(&pdata->rlock, flags);
osi_enable_chan_tx_intr(osi_dma, chan);
spin_unlock_irqrestore(&pdata->rlock, flags);
}
return processed;
}
static enum hrtimer_restart ether_tx_usecs_hrtimer(struct hrtimer *data)
{
struct ether_tx_napi *tx_napi = container_of(data, struct ether_tx_napi,
tx_usecs_timer);
struct ether_priv_data *pdata = tx_napi->pdata;
struct osi_core_priv_data *osi_core = pdata->osi_core;
unsigned long val;
val = osi_core->xstats.tx_usecs_swtimer_n[tx_napi->chan];
osi_core->xstats.tx_usecs_swtimer_n[tx_napi->chan] =
osi_update_stats_counter(val, 1U);
atomic_set(&pdata->tx_napi[tx_napi->chan]->tx_usecs_timer_armed,
OSI_DISABLE);
if (likely(napi_schedule_prep(&tx_napi->napi)))
__napi_schedule_irqoff(&tx_napi->napi);
return HRTIMER_NORESTART;
}
/**
* @brief Allocate NAPI resources.
*
* Algorithm: Allocate NAPI instances for the channels which are enabled.
*
* @param[in] pdata: OSD private data structure.
*
* @note Number of channels and channel numbers needs to be
* updated in OSI private data structure.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_alloc_napi(struct ether_priv_data *pdata)
{
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct net_device *ndev = pdata->ndev;
struct device *dev = pdata->dev;
unsigned int chan;
unsigned int i;
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
pdata->tx_napi[chan] = devm_kzalloc(dev,
sizeof(struct ether_tx_napi),
GFP_KERNEL);
if (pdata->tx_napi[chan] == NULL) {
dev_err(dev, "failed to allocate Tx NAPI resource\n");
return -ENOMEM;
}
pdata->tx_napi[chan]->pdata = pdata;
pdata->tx_napi[chan]->chan = chan;
netif_napi_add(ndev, &pdata->tx_napi[chan]->napi,
ether_napi_poll_tx, 64);
pdata->rx_napi[chan] = devm_kzalloc(dev,
sizeof(struct ether_rx_napi),
GFP_KERNEL);
if (pdata->rx_napi[chan] == NULL) {
dev_err(dev, "failed to allocate RX NAPI resource\n");
return -ENOMEM;
}
pdata->rx_napi[chan]->pdata = pdata;
pdata->rx_napi[chan]->chan = chan;
netif_napi_add(ndev, &pdata->rx_napi[chan]->napi,
ether_napi_poll_rx, 64);
}
return 0;
}
/**
* @brief MII call back for MDIO register write.
*
* Algorithm: Invoke OSI layer for PHY register write.
* phy_write() API from Linux PHY subsystem will call this.
*
* @param[in] bus: MDIO bus instances.
* @param[in] phyaddr: PHY address (ID).
* @param[in] phyreg: PHY register to write.
* @param[in] phydata: Data to be written in register.
*
* @note MAC has to be out of reset.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,
u16 phydata)
{
struct net_device *ndev = bus->priv;
struct ether_priv_data *pdata = netdev_priv(ndev);
if (!pdata->clks_enable) {
dev_err(pdata->dev,
"%s:No clks available, skipping PHY write\n", __func__);
return -ENODEV;
}
return osi_write_phy_reg(pdata->osi_core, (unsigned int)phyaddr,
(unsigned int)phyreg, phydata);
}
/**
* @brief MII call back for MDIO register read.
*
* Algorithm: Invoke OSI layer for PHY register read.
* phy_read() API from Linux subsystem will call this.
*
* @param[in] bus: MDIO bus instances.
* @param[in] phyaddr: PHY address (ID).
* @param[in] phyreg: PHY register to read.
*
* @note MAC has to be out of reset.
*
* @retval data from PHY register on success
* @retval "nagative value" on failure.
*/
static int ether_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)
{
struct net_device *ndev = bus->priv;
struct ether_priv_data *pdata = netdev_priv(ndev);
if (!pdata->clks_enable) {
dev_err(pdata->dev,
"%s:No clks available, skipping PHY read\n", __func__);
return -ENODEV;
}
return osi_read_phy_reg(pdata->osi_core, (unsigned int)phyaddr,
(unsigned int)phyreg);
}
/**
* @brief MDIO bus registration.
*
* Algorithm: Registers MDIO bus if there is mdio sub DT node
* as part of MAC DT node.
*
* @param[in] pdata: OSD private data.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_mdio_register(struct ether_priv_data *pdata)
{
struct device *dev = pdata->dev;
struct mii_bus *new_bus = NULL;
int ret = 0;
if (pdata->mdio_node == NULL) {
pdata->mii = NULL;
return 0;
}
new_bus = devm_mdiobus_alloc(dev);
if (new_bus == NULL) {
ret = -ENOMEM;
dev_err(dev, "failed to allocate MDIO bus\n");
goto exit;
}
new_bus->name = "nvethernet_mdio_bus";
new_bus->read = ether_mdio_read;
new_bus->write = ether_mdio_write;
snprintf(new_bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
new_bus->priv = pdata->ndev;
new_bus->parent = dev;
ret = of_mdiobus_register(new_bus, pdata->mdio_node);
if (ret) {
dev_err(dev, "failed to register MDIO bus (%s)\n",
new_bus->name);
goto exit;
}
pdata->mii = new_bus;
exit:
return ret;
}
/**
* @brief ether_set_vm_irq_chan_mask - Set VM DMA channel mask.
*
* Algorithm: Set VM DMA channels specific mask for ISR based on
* number of DMA channels and list of DMA channels.
*
* @param[in] vm_irq_data: VM IRQ data
* @param[in] num_vm_chan: Number of VM DMA channels
* @param[in] vm_chans: Pointer to list of VM DMA channels
*
* @retval None.
*/
static void ether_set_vm_irq_chan_mask(struct ether_vm_irq_data *vm_irq_data,
unsigned int num_vm_chan,
unsigned int *vm_chans)
{
unsigned int i;
unsigned int chan;
for (i = 0; i < num_vm_chan; i++) {
chan = vm_chans[i];
vm_irq_data->chan_mask |= ETHER_VM_IRQ_TX_CHAN_MASK(chan);
vm_irq_data->chan_mask |= ETHER_VM_IRQ_RX_CHAN_MASK(chan);
}
}
/**
* @brief ether_get_vm_irq_data - Get VM IRQ data from DT.
*
* Algorimthm: Parse DT for VM IRQ data and get VM IRQ numbers
* from DT.
*
* @param[in] pdev: Platform device instance.
* @param[in] pdata: OSD private data.
*
* @retval 0 on success
* @retval "negative value" on failure
*/
static int ether_get_vm_irq_data(struct platform_device *pdev,
struct ether_priv_data *pdata)
{
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct device_node *vm_node, *temp;
unsigned int i, j, node = 0;
int ret = 0;
vm_node = of_parse_phandle(pdev->dev.of_node,
"nvidia,vm-irq-config", 0);
if (vm_node == NULL) {
dev_err(pdata->dev, "failed to found VM IRQ configuration\n");
return -ENOMEM;
}
/* parse the number of VM IRQ's */
ret = of_property_read_u32(vm_node, "nvidia,num-vm-irqs",
&osi_dma->num_vm_irqs);
if (ret != 0) {
dev_err(&pdev->dev, "failed to get number of VM IRQ's (%d)\n",
ret);
dev_info(&pdev->dev, "Using num_vm_irqs as one\n");
osi_dma->num_vm_irqs = 1;
}
if (osi_dma->num_vm_irqs > OSI_MAX_VM_IRQS) {
dev_err(&pdev->dev, "Invalid Num. of VM IRQS\n");
return -EINVAL;
}
pdata->vm_irq_data = devm_kzalloc(pdata->dev,
sizeof(struct ether_vm_irq_data) *
osi_dma->num_vm_irqs,
GFP_KERNEL);
if (pdata->vm_irq_data == NULL) {
dev_err(&pdev->dev, "failed to allocate VM IRQ data\n");
return -ENOMEM;
}
ret = of_get_child_count(vm_node);
if (ret != osi_dma->num_vm_irqs) {
dev_err(&pdev->dev,
"Mismatch in num_vm_irqs and VM IRQ config DT nodes\n");
return -EINVAL;
}
for_each_child_of_node(vm_node, temp) {
if (node == osi_dma->num_vm_irqs)
break;
ret = of_property_read_u32(temp, "nvidia,num-vm-channels",
&osi_dma->irq_data[node].num_vm_chans);
if (ret != 0) {
dev_err(&pdev->dev,
"failed to read number of VM channels\n");
return ret;
}
ret = of_property_read_u32_array(temp, "nvidia,vm-channels",
osi_dma->irq_data[node].vm_chans,
osi_dma->irq_data[node].num_vm_chans);
if (ret != 0) {
dev_err(&pdev->dev, "failed to get VM channels\n");
return ret;
}
ether_set_vm_irq_chan_mask(&pdata->vm_irq_data[node],
osi_dma->irq_data[node].num_vm_chans,
osi_dma->irq_data[node].vm_chans);
pdata->vm_irq_data[node].pdata = pdata;
node++;
}
for (i = 0, j = 1; i < osi_dma->num_vm_irqs; i++, j++) {
pdata->vm_irqs[i] = platform_get_irq(pdev, j);
if (pdata->vm_irqs[i] < 0) {
dev_err(&pdev->dev, "failed to get VM IRQ number\n");
return pdata->vm_irqs[i];
}
}
return ret;
}
/**
* @brief Read IRQ numbers from DT.
*
* Algorithm: Reads the IRQ numbers from DT based on number of channels.
*
* @param[in] pdev: Platform device associated with driver.
* @param[in] pdata: OSD private data.
* @param[in] num_chans: Number of channels.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_get_irqs(struct platform_device *pdev,
struct ether_priv_data *pdata,
unsigned int num_chans)
{
struct osi_core_priv_data *osi_core = pdata->osi_core;
unsigned int i, j;
int ret = -1;
/* get common IRQ*/
pdata->common_irq = platform_get_irq(pdev, 0);
if (pdata->common_irq < 0) {
dev_err(&pdev->dev, "failed to get common IRQ number\n");
return pdata->common_irq;
}
if (osi_core->mac_ver > OSI_EQOS_MAC_5_00) {
ret = ether_get_vm_irq_data(pdev, pdata);
if (ret < 0) {
dev_err(pdata->dev, "failed to get VM IRQ info\n");
return ret;
}
} else {
/* get TX IRQ numbers */
for (i = 0, j = 1; i < num_chans; i++) {
pdata->tx_irqs[i] = platform_get_irq(pdev, j++);
if (pdata->tx_irqs[i] < 0) {
dev_err(&pdev->dev, "failed to get TX IRQ number\n");
return pdata->tx_irqs[i];
}
}
for (i = 0; i < num_chans; i++) {
pdata->rx_irqs[i] = platform_get_irq(pdev, j++);
if (pdata->rx_irqs[i] < 0) {
dev_err(&pdev->dev, "failed to get RX IRQ number\n");
return pdata->rx_irqs[i];
}
}
}
return 0;
}
/**
* @brief Get MAC address from DT
*
* Algorithm: Populates MAC address by reading DT node.
*
* @param[in] node_name: Device tree node name.
* @param[in] property_name: DT property name inside DT node.
* @param[in] mac_addr: MAC address.
*
* @note Bootloader needs to updates chosen DT node with MAC
* address.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_get_mac_address_dtb(const char *node_name,
const char *property_name,
unsigned char *mac_addr)
{
struct device_node *np = of_find_node_by_path(node_name);
const char *mac_str = NULL;
int values[6] = {0};
unsigned char mac_temp[6] = {0};
int i, ret = 0;
if (np == NULL)
return -EADDRNOTAVAIL;
/* If the property is present but contains an invalid value,
* then something is wrong. Log the error in that case.
*/
if (of_property_read_string(np, property_name, &mac_str)) {
ret = -EADDRNOTAVAIL;
goto err_out;
}
/* The DTB property is a string of the form xx:xx:xx:xx:xx:xx
* Convert to an array of bytes.
*/
if (sscanf(mac_str, "%x:%x:%x:%x:%x:%x",
&values[0], &values[1], &values[2],
&values[3], &values[4], &values[5]) != 6) {
ret = -EINVAL;
goto err_out;
}
for (i = 0; i < ETH_ALEN; ++i)
mac_temp[i] = (unsigned char)values[i];
if (!is_valid_ether_addr(mac_temp)) {
ret = -EINVAL;
goto err_out;
}
memcpy(mac_addr, mac_temp, ETH_ALEN);
of_node_put(np);
return ret;
err_out:
pr_err("%s: bad mac address at %s/%s: %s.\n",
__func__, node_name, property_name,
(mac_str != NULL) ? mac_str : "NULL");
of_node_put(np);
return ret;
}
/**
* @brief Get MAC address from DT
*
* Algorithm: Populates MAC address by reading DT node.
*
* @param[in] pdata: OSD private data.
*
* @note Bootloader needs to updates chosen DT node with MAC address.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_get_mac_address(struct ether_priv_data *pdata)
{
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct device *dev = pdata->dev;
struct net_device *ndev = pdata->ndev;
struct device_node *np = dev->of_node;
const char *eth_mac_addr = NULL;
unsigned char mac_addr[ETH_ALEN] = {0};
int ret = 0;
if (!osi_core->pre_si) {
/* read MAC address */
eth_mac_addr = of_get_mac_address(np);
if (IS_ERR_OR_NULL(eth_mac_addr)) {
ret = ether_get_mac_address_dtb("/chosen",
"nvidia,ether-mac",
mac_addr);
if (ret < 0)
return ret;
eth_mac_addr = mac_addr;
} else {
if (!(is_valid_ether_addr(eth_mac_addr))) {
dev_err(dev, "Bad mac address exiting\n");
return -EINVAL;
}
}
} else {
ndev->addr_assign_type = NET_ADDR_RANDOM;
eth_random_addr(mac_addr);
eth_mac_addr = mac_addr;
}
/* Found a valid mac address */
memcpy(ndev->dev_addr, eth_mac_addr, ETH_ALEN);
memcpy(osi_core->mac_addr, eth_mac_addr, ETH_ALEN);
dev_info(dev, "Ethernet MAC address: %pM\n", ndev->dev_addr);
return ret;
}
/**
* @brief Put back MAC related clocks.
*
* Algorithm: Put back or release the MAC related clocks.
*
* @param[in] pdata: OSD private data.
*/
static inline void ether_put_clks(struct ether_priv_data *pdata)
{
struct device *dev = pdata->dev;
if (pdata->osi_core->pre_si) {
return;
}
if (!IS_ERR_OR_NULL(pdata->tx_clk)) {
devm_clk_put(dev, pdata->tx_clk);
}
if (!IS_ERR_OR_NULL(pdata->ptp_ref_clk)) {
devm_clk_put(dev, pdata->ptp_ref_clk);
}
if (!IS_ERR_OR_NULL(pdata->rx_clk)) {
devm_clk_put(dev, pdata->rx_clk);
}
if (!IS_ERR_OR_NULL(pdata->axi_clk)) {
devm_clk_put(dev, pdata->axi_clk);
}
if (!IS_ERR_OR_NULL(pdata->axi_cbb_clk)) {
devm_clk_put(dev, pdata->axi_cbb_clk);
}
if (!IS_ERR_OR_NULL(pdata->pllrefe_clk)) {
devm_clk_put(dev, pdata->pllrefe_clk);
}
}
/**
* @brief Get MAC related clocks.
*
* Algorithm: Get the clocks from DT and stores in OSD private data.
*
* @param[in] pdata: OSD private data.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_get_clks(struct ether_priv_data *pdata)
{
struct device *dev = pdata->dev;
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret;
/* Skip pll_refe clock initialisation for t18x platform */
if (osi_core->mac_ver >= OSI_EQOS_MAC_5_00) {
pdata->pllrefe_clk = devm_clk_get(dev, "pllrefe_vcoout");
if (IS_ERR(pdata->pllrefe_clk)) {
dev_info(dev, "failed to get pllrefe_vcoout clk\n");
return PTR_ERR(pdata->pllrefe_clk);
}
}
pdata->axi_cbb_clk = devm_clk_get(dev, "axi_cbb");
if (IS_ERR(pdata->axi_cbb_clk)) {
ret = PTR_ERR(pdata->axi_cbb_clk);
dev_err(dev, "failed to get axi_cbb clk\n");
goto err_axi_cbb;
}
pdata->axi_clk = devm_clk_get(dev, "eqos_axi");
if (IS_ERR(pdata->axi_clk)) {
ret = PTR_ERR(pdata->axi_clk);
dev_err(dev, "failed to get eqos_axi clk\n");
goto err_axi;
}
pdata->rx_clk = devm_clk_get(dev, "eqos_rx");
if (IS_ERR(pdata->rx_clk)) {
ret = PTR_ERR(pdata->rx_clk);
dev_err(dev, "failed to get eqos_rx clk\n");
goto err_rx;
}
pdata->ptp_ref_clk = devm_clk_get(dev, "eqos_ptp_ref");
if (IS_ERR(pdata->ptp_ref_clk)) {
ret = PTR_ERR(pdata->ptp_ref_clk);
dev_err(dev, "failed to get eqos_ptp_ref clk\n");
goto err_ptp_ref;
}
pdata->tx_clk = devm_clk_get(dev, "eqos_tx");
if (IS_ERR(pdata->tx_clk)) {
ret = PTR_ERR(pdata->tx_clk);
dev_err(dev, "failed to get eqos_tx clk\n");
goto err_tx;
}
return 0;
err_tx:
devm_clk_put(dev, pdata->ptp_ref_clk);
err_ptp_ref:
devm_clk_put(dev, pdata->rx_clk);
err_rx:
devm_clk_put(dev, pdata->axi_clk);
err_axi:
devm_clk_put(dev, pdata->axi_cbb_clk);
err_axi_cbb:
devm_clk_put(dev, pdata->pllrefe_clk);
return ret;
}
/**
* @brief Get Reset and MAC related clocks.
*
* Algorithm: Get the resets and MAC related clocks from DT and stores in
* OSD private data. It also sets MDC clock rate by invoking OSI layer
* with osi_set_mdc_clk_rate().
*
* @param[in] pdev: Platform device.
* @param[in] pdata: OSD private data.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_configure_car(struct platform_device *pdev,
struct ether_priv_data *pdata)
{
struct device *dev = pdata->dev;
struct device_node *np = dev->of_node;
struct osi_core_priv_data *osi_core = pdata->osi_core;
unsigned long csr_clk_rate = 0;
int ret = 0;
if (osi_core->pre_si) {
/* Enabling clks to set so that MDIO read/write will happen */
pdata->clks_enable = true;
return 0;
}
/* get MAC reset */
pdata->mac_rst = devm_reset_control_get(&pdev->dev, "mac_rst");
if (IS_ERR_OR_NULL(pdata->mac_rst)) {
dev_err(&pdev->dev, "failed to get MAC reset\n");
return PTR_ERR(pdata->mac_rst);
}
/* get PHY reset */
pdata->phy_reset = of_get_named_gpio(np, "nvidia,phy-reset-gpio", 0);
if (pdata->phy_reset < 0) {
if (pdata->phy_reset == -EPROBE_DEFER)
return pdata->phy_reset;
else
dev_info(dev, "failed to get phy reset gpio error: %d\n",
pdata->phy_reset);
}
if (gpio_is_valid(pdata->phy_reset)) {
ret = devm_gpio_request_one(dev, (unsigned int)pdata->phy_reset,
GPIOF_OUT_INIT_HIGH,
"phy_reset");
if (ret < 0) {
dev_err(dev, "failed to request PHY reset gpio\n");
goto exit;
}
gpio_set_value(pdata->phy_reset, 0);
usleep_range(10, 11);
gpio_set_value(pdata->phy_reset, 1);
}
ret = ether_get_clks(pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get clks\n");
goto err_get_clks;
}
/* set PTP clock rate*/
ret = clk_set_rate(pdata->ptp_ref_clk, pdata->ptp_ref_clock_speed);
if (ret < 0) {
dev_err(&pdev->dev, "failed to set ptp clk rate\n");
goto err_set_ptp_rate;
} else {
osi_core->ptp_config.ptp_ref_clk_rate = pdata->ptp_ref_clock_speed;
}
ret = ether_enable_clks(pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to enable clks\n");
goto err_enable_clks;
}
if (pdata->mac_rst) {
ret = reset_control_reset(pdata->mac_rst);
if (ret < 0) {
dev_err(&pdev->dev, "failed to reset MAC HW\n");
goto err_rst;
}
}
csr_clk_rate = clk_get_rate(pdata->axi_cbb_clk);
osi_set_mdc_clk_rate(pdata->osi_core, csr_clk_rate);
return ret;
err_rst:
ether_disable_clks(pdata);
err_enable_clks:
err_set_ptp_rate:
ether_put_clks(pdata);
err_get_clks:
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, OSI_DISABLE);
}
exit:
return ret;
}
/**
* @brief Get platform resources
*
* Algorithm: Populates base address, clks, reset and MAC address.
*
* @param[in] pdev: Platform device associated with platform driver.
* @param[in] pdata: OSD private data.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_init_plat_resources(struct platform_device *pdev,
struct ether_priv_data *pdata)
{
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct resource *res;
int ret = 0;
/* get base address and remap */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
osi_core->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(osi_core->base)) {
dev_err(&pdev->dev, "failed to ioremap MAC base address\n");
return PTR_ERR(osi_core->base);
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"dma_base");
if (res) {
/* Update dma base */
osi_dma->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(osi_dma->base)) {
dev_err(&pdev->dev, "failed to ioremap DMA address\n");
return PTR_ERR(osi_dma->base);
}
} else {
/* Update core base to dma/common base */
osi_dma->base = osi_core->base;
}
ret = ether_configure_car(pdev, pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get clks/reset");
goto rst_clk_fail;
}
/*FIXME Need to program different MAC address for other FDs into
* different MAC address registers. Need to add DA based filtering
* support. Get MAC address from DT
*/
ret = ether_get_mac_address(pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get MAC address");
goto mac_addr_fail;
}
return 0;
mac_addr_fail:
ether_disable_clks(pdata);
ether_put_clks(pdata);
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, OSI_DISABLE);
}
rst_clk_fail:
return ret;
}
/**
* @brief Parse PHY DT.
*
* Algorithm: Reads PHY DT. Updates required data.
*
* @param[in] pdata: OS dependent private data structure.
* @param[in] node: DT node entry of MAC
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_parse_phy_dt(struct ether_priv_data *pdata,
struct device_node *node)
{
#if KERNEL_VERSION(5, 5, 0) > LINUX_VERSION_CODE
pdata->interface = of_get_phy_mode(node);
#else
int err;
err = of_get_phy_mode(node, &pdata->interface);
if (err < 0)
pr_debug("%s(): phy interface not found\n", __func__);
#endif
pdata->phy_node = of_parse_phandle(node, "phy-handle", 0);
if (pdata->phy_node == NULL)
pr_debug("%s(): phy handle not found\n", __func__);
/* If nvidia,eqos-mdio is passed from DT, always register the MDIO */
for_each_child_of_node(node, pdata->mdio_node) {
if (of_device_is_compatible(pdata->mdio_node,
"nvidia,eqos-mdio"))
break;
}
/* In the case of a fixed PHY, the DT node associated
* to the PHY is the Ethernet MAC DT node.
*/
if ((pdata->phy_node == NULL) && of_phy_is_fixed_link(node)) {
if ((of_phy_register_fixed_link(node) < 0))
return -ENODEV;
pdata->phy_node = of_node_get(node);
}
return 0;
}
/**
* @brief Parse queue priority DT.
*
* Algorithm: Reads queue priority form DT. Updates
* data either by DT values or by default value.
*
* @param[in] pdata: OS dependent private data structure.
* @param[in] pdt_prop: name of property
* @param[in] pval: structure pointer where value will be filed
* @param[in] val_def: default value if DT entry not reset
* @param[in] val_max: max value supported
* @param[in] num_entries: number of entries to be read form DT
*
* @note All queue priorities should be different from DT.
*/
static void ether_parse_queue_prio(struct ether_priv_data *pdata,
const char *pdt_prop,
unsigned int *pval, unsigned int val_def,
unsigned int val_max,
unsigned int num_entries)
{
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct device_node *pnode = pdata->dev->of_node;
unsigned int i, pmask = 0x0U;
unsigned int mtlq;
unsigned int tval[OSI_EQOS_MAX_NUM_QUEUES];
int ret = 0;
ret = of_property_read_u32_array(pnode, pdt_prop, pval, num_entries);
if (ret < 0) {
dev_info(pdata->dev, "%s(): \"%s\" read failed %d."
"Using default\n", __func__, pdt_prop, ret);
for (i = 0; i < num_entries; i++) {
pval[i] = val_def;
}
return;
}
for (i = 0; i < num_entries; i++) {
tval[i] = pval[i];
}
/* If Some priority is already given to queue or priority in DT is
* more than MAX priority, assign default priority to queue with
* error message
*/
for (i = 0; i < num_entries; i++) {
mtlq = osi_core->mtl_queues[i];
if ((tval[i] > val_max) || ((pmask & (1U << tval[i])) != 0U)) {
dev_err(pdata->dev, "%s():Wrong or duplicate priority"
" in DT entry for Q(%d)\n", __func__, mtlq);
pval[mtlq] = val_def;
continue;
}
pval[mtlq] = tval[i];
pmask |= 1U << tval[i];
}
}
/**
* @brief Parse MAC and PHY DT.
*
* Algorithm: Reads MAC and PHY DT. Updates required data.
*
* @param[in] pdata: OS dependent private data structure.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_parse_dt(struct ether_priv_data *pdata)
{
struct device *dev = pdata->dev;
struct platform_device *pdev = to_platform_device(dev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
unsigned int tmp_value[OSI_EQOS_MAX_NUM_QUEUES];
struct device_node *np = dev->of_node;
int ret = -EINVAL;
unsigned int i, mtlq, chan;
/* read ptp clock */
ret = of_property_read_u32(np, "nvidia,ptp_ref_clock_speed",
&pdata->ptp_ref_clock_speed);
if (ret != 0) {
dev_err(dev, "setting default PTP clk rate as 312.5MHz\n");
pdata->ptp_ref_clock_speed = ETHER_DFLT_PTP_CLK;
}
/* read promiscuous mode supported or not */
ret = of_property_read_u32(np, "nvidia,promisc_mode",
&pdata->promisc_mode);
if (ret != 0) {
dev_info(dev, "setting default promiscuous mode supported\n");
pdata->promisc_mode = OSI_ENABLE;
}
/* any other invalid promiscuous mode DT value */
if (pdata->promisc_mode != OSI_DISABLE &&
pdata->promisc_mode != OSI_ENABLE){
dev_info(dev, "Invalid promiscuous mode - setting supported\n");
pdata->promisc_mode = OSI_ENABLE;
}
/* Read Pause frame feature support */
ret = of_property_read_u32(np, "nvidia,pause_frames",
&pdata->osi_core->pause_frames);
if (ret < 0) {
dev_info(dev, "Failed to read nvida,pause_frames, so"
" setting to default support as disable\n");
pdata->osi_core->pause_frames = OSI_PAUSE_FRAMES_DISABLE;
}
/* Check if IOMMU is enabled */
if (iommu_get_domain_for_dev(&pdev->dev) != NULL) {
/* Read and set dma-mask from DT only if IOMMU is enabled*/
ret = of_property_read_u64(np, "dma-mask", &pdata->dma_mask);
}
if (ret != 0) {
dev_info(dev, "setting to default DMA bit mask\n");
pdata->dma_mask = DMA_MASK_NONE;
}
ret = of_property_read_u32_array(np, "nvidia,mtl-queues",
osi_core->mtl_queues,
osi_core->num_mtl_queues);
if (ret < 0) {
dev_err(dev, "failed to read MTL Queue numbers\n");
if (osi_core->num_mtl_queues == 1) {
osi_core->mtl_queues[0] = 0;
dev_info(dev, "setting default MTL queue: 0\n");
} else {
goto exit;
}
}
ret = of_property_read_u32_array(np, "nvidia,dma-chans",
osi_dma->dma_chans,
osi_dma->num_dma_chans);
if (ret < 0) {
dev_err(dev, "failed to read DMA channel numbers\n");
if (osi_dma->num_dma_chans == 1) {
osi_dma->dma_chans[0] = 0;
dev_info(dev, "setting default DMA channel: 0\n");
} else {
goto exit;
}
}
if (osi_dma->num_dma_chans != osi_core->num_mtl_queues) {
dev_err(dev, "mismatch in numbers of DMA channel and MTL Q\n");
return -EINVAL;
}
#if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE)
/* Allow to set non zero DMA channel for virtualization */
if (!ether_init_ivc(pdata)) {
osi_dma->use_virtualization = OSI_ENABLE;
/* read mac management flag and set use_stats */
of_property_read_u32(np, "nvidia,mmc_daemon",
&pdata->use_stats);
dev_info(dev, "Virtualization is enabled & stats flag is %d\n",
pdata->use_stats);
} else {
ret = -1;
pdata->use_stats = OSI_ENABLE;
}
#else
ret = -1;
#endif
for (i = 0; i < osi_dma->num_dma_chans; i++) {
if (osi_dma->dma_chans[i] != osi_core->mtl_queues[i]) {
dev_err(dev,
"mismatch in DMA channel and MTL Q number at index %d\n",
i);
return -EINVAL;
}
if (osi_dma->dma_chans[i] == 0) {
ret = 0;
}
}
if (ret != 0) {
dev_err(dev, "Q0 Must be enabled for rx path\n");
return -EINVAL;
}
ret = of_property_read_u32_array(np, "nvidia,rxq_enable_ctrl",
tmp_value,
osi_core->num_mtl_queues);
if (ret < 0) {
dev_err(dev, "failed to read rxq enable ctrl\n");
return ret;
} else {
for (i = 0; i < osi_core->num_mtl_queues; i++) {
mtlq = osi_core->mtl_queues[i];
osi_core->rxq_ctrl[mtlq] = tmp_value[i];
}
}
/* Read tx queue priority */
ether_parse_queue_prio(pdata, "nvidia,tx-queue-prio", pdata->txq_prio,
ETHER_QUEUE_PRIO_DEFAULT, ETHER_QUEUE_PRIO_MAX,
osi_core->num_mtl_queues);
/* Read TX slot enable check array DT node */
ret = of_property_read_u32_array(np, "nvidia,slot_num_check",
tmp_value,
osi_dma->num_dma_chans);
if (ret < 0) {
dev_info(dev,
"Failed to read slot_num_check, disabling slot\n");
for (i = 0; i < osi_dma->num_dma_chans; i++)
osi_dma->slot_enabled[i] = OSI_DISABLE;
} else {
/* Set slot enable flags */
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
osi_dma->slot_enabled[chan] = tmp_value[i];
}
/* Read TX slot intervals DT node */
ret = of_property_read_u32_array(np, "nvidia,slot_intvl_vals",
tmp_value,
osi_dma->num_dma_chans);
if (ret < 0) {
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
osi_dma->slot_interval[chan] =
OSI_SLOT_INTVL_DEFAULT;
}
} else {
/* Copy slot intervals */
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
osi_dma->slot_interval[chan] = tmp_value[i];
}
}
}
/* Read Rx Queue - User priority mapping for tagged packets */
ret = of_property_read_u32_array(np, "nvidia,rx-queue-prio",
tmp_value,
osi_core->num_mtl_queues);
if (ret < 0) {
dev_info(dev, "failed to read rx Queue priority mapping, Setting default 0x0\n");
for (i = 0; i < osi_core->num_mtl_queues; i++) {
osi_core->rxq_prio[i] = 0x0U;
}
} else {
for (i = 0; i < osi_core->num_mtl_queues; i++) {
mtlq = osi_core->mtl_queues[i];
osi_core->rxq_prio[mtlq] = tmp_value[i];
}
}
/* Read DCS enable/disable input, default disable */
ret = of_property_read_u32(np, "nvidia,dcs-enable", &osi_core->dcs_en);
if (ret < 0 || osi_core->dcs_en != OSI_ENABLE) {
osi_core->dcs_en = OSI_DISABLE;
}
/* Read MAX MTU size supported */
ret = of_property_read_u32(np, "nvidia,max-platform-mtu",
&pdata->max_platform_mtu);
if (ret < 0) {
dev_info(dev, "max-platform-mtu DT entry missing, setting default %d\n",
OSI_DFLT_MTU_SIZE);
pdata->max_platform_mtu = OSI_DFLT_MTU_SIZE;
} else {
if (pdata->max_platform_mtu > OSI_MAX_MTU_SIZE ||
pdata->max_platform_mtu < ETH_MIN_MTU) {
dev_info(dev, "Invalid max-platform-mtu, setting default %d\n",
OSI_DFLT_MTU_SIZE);
pdata->max_platform_mtu = OSI_DFLT_MTU_SIZE;
}
}
/* tx_usecs value to be set */
ret = of_property_read_u32(np, "nvidia,tx_usecs", &osi_dma->tx_usecs);
if (ret < 0) {
osi_dma->use_tx_usecs = OSI_DISABLE;
} else {
if (osi_dma->tx_usecs > OSI_MAX_TX_COALESCE_USEC ||
osi_dma->tx_usecs < OSI_MIN_TX_COALESCE_USEC) {
dev_err(dev,
"invalid tx_riwt, must be inrange %d to %d\n",
OSI_MIN_TX_COALESCE_USEC,
OSI_MAX_TX_COALESCE_USEC);
return -EINVAL;
}
osi_dma->use_tx_usecs = OSI_ENABLE;
}
/* tx_frames value to be set */
ret = of_property_read_u32(np, "nvidia,tx_frames",
&osi_dma->tx_frames);
if (ret < 0) {
osi_dma->use_tx_frames = OSI_DISABLE;
} else {
if (osi_dma->tx_frames > ETHER_TX_MAX_FRAME ||
osi_dma->tx_frames < OSI_MIN_TX_COALESCE_FRAMES) {
dev_err(dev,
"invalid tx-frames, must be inrange %d to %ld",
OSI_MIN_TX_COALESCE_FRAMES, ETHER_TX_MAX_FRAME);
return -EINVAL;
}
osi_dma->use_tx_frames = OSI_ENABLE;
}
if (osi_dma->use_tx_usecs == OSI_DISABLE &&
osi_dma->use_tx_frames == OSI_ENABLE) {
dev_err(dev, "invalid settings : tx_frames must be enabled"
" along with tx_usecs in DT\n");
return -EINVAL;
}
/* RIWT value to be set */
ret = of_property_read_u32(np, "nvidia,rx_riwt", &osi_dma->rx_riwt);
if (ret < 0) {
osi_dma->use_riwt = OSI_DISABLE;
} else {
if ((osi_dma->rx_riwt > OSI_MAX_RX_COALESCE_USEC) ||
(osi_dma->rx_riwt < OSI_MIN_RX_COALESCE_USEC)) {
dev_err(dev,
"invalid rx_riwt, must be inrange %d to %d\n",
OSI_MIN_RX_COALESCE_USEC,
OSI_MAX_RX_COALESCE_USEC);
return -EINVAL;
}
osi_dma->use_riwt = OSI_ENABLE;
}
/* rx_frames value to be set */
ret = of_property_read_u32(np, "nvidia,rx_frames",
&osi_dma->rx_frames);
if (ret < 0) {
osi_dma->use_rx_frames = OSI_DISABLE;
} else {
if (osi_dma->rx_frames > RX_DESC_CNT ||
osi_dma->rx_frames < OSI_MIN_RX_COALESCE_FRAMES) {
dev_err(dev,
"invalid rx-frames, must be inrange %d to %d",
OSI_MIN_RX_COALESCE_FRAMES, RX_DESC_CNT);
return -EINVAL;
}
osi_dma->use_rx_frames = OSI_ENABLE;
}
if (osi_dma->use_riwt == OSI_DISABLE &&
osi_dma->use_rx_frames == OSI_ENABLE) {
dev_err(dev, "invalid settings : rx-frames must be enabled"
" along with use_riwt in DT\n");
return -EINVAL;
}
/* Enable VLAN strip by default */
osi_core->strip_vlan_tag = OSI_ENABLE;
ret = ether_parse_phy_dt(pdata, np);
if (ret < 0) {
dev_err(dev, "failed to parse PHY DT\n");
goto exit;
}
exit:
return ret;
}
/**
* @brief Populate number of MTL and DMA channels.
*
* Algorithm:
* 1) Updates MAC HW type based on DT compatible property.
* 2) Read number of channels from DT.
* 3) Updates number of channels based on min and max number of channels
*
* @param[in] pdev: Platform device
* @param[in] num_dma_chans: Number of channels
* @param[in] mac: MAC type based on compatible property
* @param[in] num_mtl_queues: Number of MTL queues.
*/
static void ether_get_num_dma_chan_mtl_q(struct platform_device *pdev,
unsigned int *num_dma_chans,
unsigned int *mac,
unsigned int *num_mtl_queues)
{
struct device_node *np = pdev->dev.of_node;
/* intializing with 1 channel */
unsigned int max_chans = 1;
int ret = 0;
ret = of_device_is_compatible(np, "nvidia,nveqos");
if (ret != 0) {
*mac = OSI_MAC_HW_EQOS;
max_chans = OSI_EQOS_MAX_NUM_CHANS;
}
/* parse the number of DMA channels */
ret = of_property_read_u32(np, "nvidia,num-dma-chans", num_dma_chans);
if (ret != 0) {
dev_err(&pdev->dev,
"failed to get number of DMA channels (%d)\n", ret);
dev_info(&pdev->dev, "Setting number of channels to one\n");
*num_dma_chans = 1;
} else if (*num_dma_chans < 1U || *num_dma_chans > max_chans) {
dev_warn(&pdev->dev, "Invalid num_dma_chans(=%d), setting to 1\n",
*num_dma_chans);
*num_dma_chans = 1;
} else {
/* No action required */
}
/* parse the number of mtl queues */
ret = of_property_read_u32(np, "nvidia,num-mtl-queues", num_mtl_queues);
if (ret != 0) {
dev_err(&pdev->dev,
"failed to get number of MTL queueus (%d)\n", ret);
dev_info(&pdev->dev, "Setting number of queues to one\n");
*num_mtl_queues = 1;
} else if (*num_mtl_queues < 1U || *num_mtl_queues > max_chans) {
dev_warn(&pdev->dev, "Invalid num_mtl_queues(=%d), setting to 1\n",
*num_mtl_queues);
*num_mtl_queues = 1;
} else {
/* No action required */
}
}
/**
* @brief Set the network device feature flags
*
* Algorithm:
* 1) Check the HW features supported
* 2) Enable corresponding feature flag so that network subsystem of OS
* is aware of device capabilities.
* 3) Update current enable/disable state of features currently enabled
*
* @param[in] ndev: Network device instance
* @param[in] pdata: OS dependent private data structure.
*
* @note Netdev allocated and HW features are already parsed.
*
*/
static void ether_set_ndev_features(struct net_device *ndev,
struct ether_priv_data *pdata)
{
netdev_features_t features = 0;
if (pdata->hw_feat.tso_en) {
features |= NETIF_F_TSO;
features |= NETIF_F_SG;
}
if (pdata->hw_feat.tx_coe_sel) {
features |= NETIF_F_IP_CSUM;
features |= NETIF_F_IPV6_CSUM;
}
if (pdata->hw_feat.rx_coe_sel) {
features |= NETIF_F_RXCSUM;
}
/* GRO is independent of HW features */
features |= NETIF_F_GRO;
if (pdata->hw_feat.sa_vlan_ins) {
features |= NETIF_F_HW_VLAN_CTAG_TX;
}
/* Rx VLAN tag stripping/filtering enabled by default */
features |= NETIF_F_HW_VLAN_CTAG_RX;
features |= NETIF_F_HW_VLAN_CTAG_FILTER;
/* Features available in HW */
ndev->hw_features = features;
/* Features that can be changed by user */
ndev->features = features;
/* Features that can be inherited by vlan devices */
ndev->vlan_features = features;
/* Set current state of features enabled by default in HW */
pdata->hw_feat_cur_state = features;
}
/**
* @brief Static function to initialize filter register count
* in private data structure
*
* Algorithm: Updates addr_reg_cnt based on HW feature
*
* @param[in] pdata: ethernet private data structure
*
* @note MAC_HW_Feature1 register need to read and store the value of ADDR64.
*/
static void init_filter_values(struct ether_priv_data *pdata)
{
if (pdata->hw_feat.mac_addr64_sel == OSI_ENABLE) {
pdata->num_mac_addr_regs = ETHER_ADDR_REG_CNT_128;
} else if (pdata->hw_feat.mac_addr32_sel == OSI_ENABLE) {
pdata->num_mac_addr_regs = ETHER_ADDR_REG_CNT_64;
} else if (pdata->hw_feat.mac_addr_sel ==
(ETHER_ADDR_REG_CNT_32 - 1U)) {
pdata->num_mac_addr_regs = ETHER_ADDR_REG_CNT_32;
} else {
pdata->num_mac_addr_regs = ETHER_ADDR_REG_CNT_1;
}
}
/**
* @brief Sets whether platform is Pre-silicon or not.
*
* Algorithm: Updates OSI whether respective platform is Pre-silicon or not
*
* @param[in] osi_core: OSI core private data structure
*/
static inline void tegra_pre_si_platform(struct osi_core_priv_data *osi_core)
{
/* VDK set true for both VDK/uFPGA */
if (tegra_platform_is_vdk())
osi_core->pre_si = 1;
else
osi_core->pre_si = 0;
}
/**
* @brief Ethernet platform driver probe.
*
* Algorithm:
* 1) Get the number of channels from DT.
* 2) Allocate the network device for those many channels.
* 3) Parse MAC and PHY DT.
* 4) Update callback function for rx buffer reallocation
* 5) Get all required clks/reset/IRQ's.
* 6) Register MDIO bus and network device.
* 7) Initialize spinlock.
* 8) Update filter value based on HW feature.
* 9) Initialize Workqueue to read MMC counters periodically.
*
* @param[in] pdev: platform device associated with platform driver.
*
* @retval 0 on success
* @retval "negative value" on failure
*
*/
static int ether_probe(struct platform_device *pdev)
{
struct ether_priv_data *pdata;
unsigned int num_dma_chans, mac, num_mtl_queues, chan;
struct osi_core_priv_data *osi_core;
struct osi_dma_priv_data *osi_dma;
struct net_device *ndev;
int ret = 0, i;
ether_get_num_dma_chan_mtl_q(pdev, &num_dma_chans,
&mac, &num_mtl_queues);
osi_core = devm_kzalloc(&pdev->dev, sizeof(*osi_core), GFP_KERNEL);
if (osi_core == NULL) {
return -ENOMEM;
}
osi_dma = devm_kzalloc(&pdev->dev, sizeof(*osi_dma), GFP_KERNEL);
if (osi_dma == NULL) {
return -ENOMEM;
}
/* allocate and set up the ethernet device */
ndev = alloc_etherdev_mq((int)sizeof(struct ether_priv_data),
num_dma_chans);
if (ndev == NULL) {
dev_err(&pdev->dev, "failed to allocate net device\n");
return -ENOMEM;
}
SET_NETDEV_DEV(ndev, &pdev->dev);
pdata = netdev_priv(ndev);
pdata->dev = &pdev->dev;
pdata->ndev = ndev;
platform_set_drvdata(pdev, ndev);
pdata->osi_core = osi_core;
pdata->osi_dma = osi_dma;
osi_core->osd = pdata;
osi_dma->osd = pdata;
osi_core->num_mtl_queues = num_mtl_queues;
osi_dma->num_dma_chans = num_dma_chans;
osi_core->mac = mac;
osi_dma->mac = mac;
osi_core->mtu = ndev->mtu;
osi_dma->mtu = ndev->mtu;
tegra_pre_si_platform(osi_core);
/* Initialize core and DMA ops based on MAC type */
if (osi_init_core_ops(osi_core) != 0) {
dev_err(&pdev->dev, "failed to get osi_init_core_ops\n");
goto err_core_ops;
}
/* Define re-allocation routine */
osi_dma->osd_ops.realloc_buf = osd_realloc_buf;
if (osi_init_dma_ops(osi_dma) != 0) {
dev_err(&pdev->dev, "failed to get osi_init_dma_ops\n");
goto err_dma_ops;
}
/* Parse the ethernet DT node */
ret = ether_parse_dt(pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to parse DT\n");
goto err_parse_dt;
}
ndev->max_mtu = pdata->max_platform_mtu;
/* get base address, clks, reset ID's and MAC address*/
ret = ether_init_plat_resources(pdev, pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to allocate platform resources\n");
goto err_init_res;
}
osi_get_hw_features(osi_core->base, &pdata->hw_feat);
/* Set netdev features based on hw features */
ether_set_ndev_features(ndev, pdata);
ret = osi_get_mac_version(osi_core->base, &osi_core->mac_ver);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get MAC version (%u)\n",
osi_core->mac_ver);
goto err_dma_mask;
}
ret = ether_get_irqs(pdev, pdata, num_dma_chans);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get IRQ's\n");
goto err_dma_mask;
}
ret = ether_mdio_register(pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register MDIO bus\n");
goto err_dma_mask;
}
ndev->netdev_ops = ðer_netdev_ops;
ether_set_ethtool_ops(ndev);
ret = ether_alloc_napi(pdata);
if (ret < 0) {
dev_err(&pdev->dev, "failed to allocate NAPI\n");
goto err_napi;
}
/* Setup the tx_usecs timer */
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
atomic_set(&pdata->tx_napi[chan]->tx_usecs_timer_armed,
OSI_DISABLE);
hrtimer_init(&pdata->tx_napi[chan]->tx_usecs_timer,
CLOCK_MONOTONIC, HRTIMER_MODE_REL);
pdata->tx_napi[chan]->tx_usecs_timer.function =
ether_tx_usecs_hrtimer;
}
ret = register_netdev(ndev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register netdev\n");
goto err_netdev;
}
/* Register sysfs entry */
ret = ether_sysfs_register(pdata);
if (ret < 0) {
dev_err(&pdev->dev,
"failed to create nvethernet sysfs group\n");
goto err_sysfs;
}
spin_lock_init(&pdata->rlock);
init_filter_values(pdata);
/* Disable Clocks */
ether_disable_clks(pdata);
dev_info(&pdev->dev,
"%s (HW ver: %02x) created with %u DMA channels\n",
netdev_name(ndev), osi_core->mac_ver, num_dma_chans);
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, OSI_DISABLE);
}
/* Initialization of delayed workqueue */
INIT_DELAYED_WORK(&pdata->ether_stats_work, ether_stats_work_func);
return 0;
err_sysfs:
unregister_netdev(ndev);
err_netdev:
err_napi:
mdiobus_unregister(pdata->mii);
err_dma_mask:
ether_disable_clks(pdata);
ether_put_clks(pdata);
if (gpio_is_valid(pdata->phy_reset)) {
gpio_set_value(pdata->phy_reset, OSI_DISABLE);
}
err_init_res:
err_parse_dt:
err_core_ops:
err_dma_ops:
free_netdev(ndev);
return ret;
}
/**
* @brief Ethernet platform driver remove.
*
* Alogorithm: Release all the resources
*
* @param[in] pdev: Platform device associated with platform driver.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct ether_priv_data *pdata = netdev_priv(ndev);
unregister_netdev(ndev);
/* remove nvethernet sysfs group under /sys/devices// */
ether_sysfs_unregister(pdata);
if (pdata->mii != NULL) {
mdiobus_unregister(pdata->mii);
}
ether_put_clks(pdata);
/* Assert MAC RST gpio */
if (!pdata->osi_core->pre_si && pdata->mac_rst) {
reset_control_assert(pdata->mac_rst);
}
free_netdev(ndev);
return 0;
}
#ifdef CONFIG_PM
/**
* @brief Ethernet platform driver suspend noirq callback.
*
* Alogorithm: Stops all data queues and PHY if the device
* does not wake capable. Disable TX and NAPI.
* Deinit OSI core, DMA and TX/RX interrupts.
*
* @param[in] dev: Platform device associated with platform driver.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_suspend_noirq(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
unsigned int i = 0, chan = 0;
if (!netif_running(ndev))
return 0;
/* Since MAC is placed in reset during suspend, take a backup of
* current configuration so that SW view of HW is maintained across
* suspend/resume.
*/
if (osi_save_registers(osi_core)) {
dev_err(dev, "Failed to backup MAC core registers\n");
return -EBUSY;
}
/* Stop workqueue while DUT is going to suspend state */
ether_stats_work_queue_stop(pdata);
if (pdata->phydev && !(device_may_wakeup(&ndev->dev))) {
phy_stop(pdata->phydev);
if (gpio_is_valid(pdata->phy_reset))
gpio_set_value(pdata->phy_reset, 0);
}
netif_tx_disable(ndev);
ether_napi_disable(pdata);
osi_hw_dma_deinit(osi_dma);
osi_hw_core_deinit(osi_core);
for (i = 0; i < osi_dma->num_dma_chans; i++) {
chan = osi_dma->dma_chans[i];
osi_disable_chan_tx_intr(osi_dma, chan);
osi_disable_chan_rx_intr(osi_dma, chan);
}
free_dma_resources(pdata);
/* disable MAC clocks */
ether_disable_clks(pdata);
return 0;
}
/**
* @brief Ethernet platform driver resume call.
*
* Alogorithm: Init OSI core, DMA and TX/RX interrupts.
* Enable PHY device if it does not wake capable,
* all data queues and NAPI.
*
* @param[in] pdata: OS dependent private data structure.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_resume(struct ether_priv_data *pdata)
{
struct osi_core_priv_data *osi_core = pdata->osi_core;
struct osi_dma_priv_data *osi_dma = pdata->osi_dma;
struct device *dev = pdata->dev;
struct net_device *ndev = pdata->ndev;
int ret = 0;
if (pdata->mac_rst) {
ret = reset_control_reset(pdata->mac_rst);
if (ret < 0) {
dev_err(dev, "failed to reset mac hw\n");
return -1;
}
}
ret = osi_poll_for_mac_reset_complete(osi_core);
if (ret < 0) {
dev_err(dev, "failed to poll mac software reset\n");
return ret;
}
ret = osi_pad_calibrate(osi_core);
if (ret < 0) {
dev_err(dev, "failed to do pad caliberation\n");
return ret;
}
osi_set_rx_buf_len(osi_dma);
ret = ether_allocate_dma_resources(pdata);
if (ret < 0) {
dev_err(dev, "failed to allocate dma resources\n");
return ret;
}
/* initialize mac/mtl/dma common registers */
ret = osi_hw_core_init(osi_core,
pdata->hw_feat.tx_fifo_size,
pdata->hw_feat.rx_fifo_size);
if (ret < 0) {
dev_err(dev,
"%s: failed to initialize mac hw core with reason %d\n",
__func__, ret);
goto err_core;
}
/* dma init */
ret = osi_hw_dma_init(osi_dma);
if (ret < 0) {
dev_err(dev,
"%s: failed to initialize mac hw dma with reason %d\n",
__func__, ret);
goto err_dma;
}
/* enable NAPI */
ether_napi_enable(pdata);
/* start the mac */
osi_start_mac(osi_core);
if (pdata->phydev && !(device_may_wakeup(&ndev->dev))) {
/* configure phy init */
phy_init_hw(pdata->phydev);
/* start phy */
phy_start(pdata->phydev);
}
/* start network queues */
netif_tx_start_all_queues(ndev);
/* re-start workqueue */
ether_stats_work_queue_start(pdata);
return 0;
err_dma:
osi_hw_core_deinit(osi_core);
err_core:
free_dma_resources(pdata);
return ret;
}
/**
* @brief Ethernet platform driver resume noirq callback.
*
* Alogorithm: Enable clocks and call resume sequence,
* refer ether_resume function for resume sequence.
*
* @param[in] dev: Platform device associated with platform driver.
*
* @retval 0 on success
* @retval "negative value" on failure.
*/
static int ether_resume_noirq(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ether_priv_data *pdata = netdev_priv(ndev);
struct osi_core_priv_data *osi_core = pdata->osi_core;
int ret = 0;
if (!netif_running(ndev))
return 0;
ether_enable_clks(pdata);
if (!device_may_wakeup(&ndev->dev) &&
gpio_is_valid(pdata->phy_reset) &&
!gpio_get_value(pdata->phy_reset)) {
/* deassert phy reset */
gpio_set_value(pdata->phy_reset, 1);
}
ret = ether_resume(pdata);
if (ret < 0) {
dev_err(dev, "failed to resume the MAC\n");
return ret;
}
/* Since MAC is brought of reset, all the SW configuration done before
* suspend/resume will be overwritten by power-on-default values.
* Restore the backup of the MAC configuration to maintain consistency
* between SW/HW state.
*/
if (osi_restore_registers(osi_core)) {
//TODO: Ideally, undo MAC init/resume & return.
dev_err(dev, "Failed to restore MAC core registers\n");
return -EIO;
}
return 0;
}
static const struct dev_pm_ops ether_pm_ops = {
.suspend_noirq = ether_suspend_noirq,
.resume_noirq = ether_resume_noirq,
};
#endif
/**
* @brief Ethernet device tree compatible match name
*/
static const struct of_device_id ether_of_match[] = {
{ .compatible = "nvidia,nveqos" },
{},
};
MODULE_DEVICE_TABLE(of, ether_of_match);
/**
* @brief Ethernet platform driver instance
*/
static struct platform_driver ether_driver = {
.probe = ether_probe,
.remove = ether_remove,
.driver = {
.name = "nvethernet",
.of_match_table = ether_of_match,
#ifdef CONFIG_PM
.pm = ðer_pm_ops,
#endif
},
};
module_platform_driver(ether_driver);
MODULE_LICENSE("GPL v2");