// SPDX-License-Identifier: GPL-2.0
/* Marvell Octeon EP (EndPoint) Ethernet Driver
*
* Copyright ( C ) 2020 Marvell .
*
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/vmalloc.h>
#include "octep_config.h"
#include "octep_main.h"
#include "octep_ctrl_net.h"
#include "octep_pfvf_mbox.h"
#define OCTEP_INTR_POLL_TIME_MSECS 100
struct workqueue_struct *octep_wq;
/* Supported Devices */
static const struct pci_device_id octep_pci_id_tbl[] = {
{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN98_PF)},
{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN93_PF)},
{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF95N_PF)},
{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN10KA_PF)},
{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF10KA_PF)},
{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF10KB_PF)},
{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN10KB_PF)},
{0 , },
};
MODULE_DEVICE_TABLE(pci, octep_pci_id_tbl);
MODULE_AUTHOR("Veerasenareddy Burru <vburru@marvell.com>" );
MODULE_DESCRIPTION(OCTEP_DRV_STRING);
MODULE_LICENSE("GPL" );
/**
* octep_alloc_ioq_vectors ( ) - Allocate Tx / Rx Queue interrupt info .
*
* @ oct : Octeon device private data structure .
*
* Allocate resources to hold per Tx / Rx queue interrupt info .
* This is the information passed to interrupt handler , from which napi poll
* is scheduled and includes quick access to private data of Tx / Rx queue
* corresponding to the interrupt being handled .
*
* Return : 0 , on successful allocation of resources for all queue interrupts .
* - 1 , if failed to allocate any resource .
*/
static int octep_alloc_ioq_vectors(struct octep_device *oct)
{
int i;
struct octep_ioq_vector *ioq_vector;
for (i = 0 ; i < oct->num_oqs; i++) {
oct->ioq_vector[i] = vzalloc(sizeof (*oct->ioq_vector[i]));
if (!oct->ioq_vector[i])
goto free_ioq_vector;
ioq_vector = oct->ioq_vector[i];
ioq_vector->iq = oct->iq[i];
ioq_vector->oq = oct->oq[i];
ioq_vector->octep_dev = oct;
}
dev_info(&oct->pdev->dev, "Allocated %d IOQ vectors\n" , oct->num_oqs);
return 0 ;
free_ioq_vector:
while (i) {
i--;
vfree(oct->ioq_vector[i]);
oct->ioq_vector[i] = NULL;
}
return -1 ;
}
/**
* octep_free_ioq_vectors ( ) - Free Tx / Rx Queue interrupt vector info .
*
* @ oct : Octeon device private data structure .
*/
static void octep_free_ioq_vectors(struct octep_device *oct)
{
int i;
for (i = 0 ; i < oct->num_oqs; i++) {
if (oct->ioq_vector[i]) {
vfree(oct->ioq_vector[i]);
oct->ioq_vector[i] = NULL;
}
}
netdev_info(oct->netdev, "Freed IOQ Vectors\n" );
}
/**
* octep_enable_msix_range ( ) - enable MSI - x interrupts .
*
* @ oct : Octeon device private data structure .
*
* Allocate and enable all MSI - x interrupts ( queue and non - queue interrupts )
* for the Octeon device .
*
* Return : 0 , on successfully enabling all MSI - x interrupts .
* - 1 , if failed to enable any MSI - x interrupt .
*/
static int octep_enable_msix_range(struct octep_device *oct)
{
int num_msix, msix_allocated;
int i;
/* Generic interrupts apart from input/output queues */
num_msix = oct->num_oqs + CFG_GET_NON_IOQ_MSIX(oct->conf);
oct->msix_entries = kcalloc(num_msix,
sizeof (struct msix_entry), GFP_KERNEL);
if (!oct->msix_entries)
goto msix_alloc_err;
for (i = 0 ; i < num_msix; i++)
oct->msix_entries[i].entry = i;
msix_allocated = pci_enable_msix_range(oct->pdev, oct->msix_entries,
num_msix, num_msix);
if (msix_allocated != num_msix) {
dev_err(&oct->pdev->dev,
"Failed to enable %d msix irqs; got only %d\n" ,
num_msix, msix_allocated);
goto enable_msix_err;
}
oct->num_irqs = msix_allocated;
dev_info(&oct->pdev->dev, "MSI-X enabled successfully\n" );
return 0 ;
enable_msix_err:
if (msix_allocated > 0 )
pci_disable_msix(oct->pdev);
kfree(oct->msix_entries);
oct->msix_entries = NULL;
msix_alloc_err:
return -1 ;
}
/**
* octep_disable_msix ( ) - disable MSI - x interrupts .
*
* @ oct : Octeon device private data structure .
*
* Disable MSI - x on the Octeon device .
*/
static void octep_disable_msix(struct octep_device *oct)
{
pci_disable_msix(oct->pdev);
kfree(oct->msix_entries);
oct->msix_entries = NULL;
dev_info(&oct->pdev->dev, "Disabled MSI-X\n" );
}
/**
* octep_mbox_intr_handler ( ) - common handler for pfvf mbox interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for pfvf mbox interrupts .
*/
static irqreturn_t octep_mbox_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.mbox_intr_handler(oct);
}
/**
* octep_oei_intr_handler ( ) - common handler for output endpoint interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for all output endpoint interrupts .
*/
static irqreturn_t octep_oei_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.oei_intr_handler(oct);
}
/**
* octep_ire_intr_handler ( ) - common handler for input ring error interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for input ring error interrupts .
*/
static irqreturn_t octep_ire_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.ire_intr_handler(oct);
}
/**
* octep_ore_intr_handler ( ) - common handler for output ring error interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for output ring error interrupts .
*/
static irqreturn_t octep_ore_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.ore_intr_handler(oct);
}
/**
* octep_vfire_intr_handler ( ) - common handler for vf input ring error interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for vf input ring error interrupts .
*/
static irqreturn_t octep_vfire_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.vfire_intr_handler(oct);
}
/**
* octep_vfore_intr_handler ( ) - common handler for vf output ring error interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for vf output ring error interrupts .
*/
static irqreturn_t octep_vfore_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.vfore_intr_handler(oct);
}
/**
* octep_dma_intr_handler ( ) - common handler for dpi dma related interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for dpi dma related interrupts .
*/
static irqreturn_t octep_dma_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.dma_intr_handler(oct);
}
/**
* octep_dma_vf_intr_handler ( ) - common handler for dpi dma transaction error interrupts for VFs .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for dpi dma transaction error interrupts for VFs .
*/
static irqreturn_t octep_dma_vf_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.dma_vf_intr_handler(oct);
}
/**
* octep_pp_vf_intr_handler ( ) - common handler for pp transaction error interrupts for VFs .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for pp transaction error interrupts for VFs .
*/
static irqreturn_t octep_pp_vf_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.pp_vf_intr_handler(oct);
}
/**
* octep_misc_intr_handler ( ) - common handler for mac related interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for mac related interrupts .
*/
static irqreturn_t octep_misc_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.misc_intr_handler(oct);
}
/**
* octep_rsvd_intr_handler ( ) - common handler for reserved interrupts ( future use ) .
*
* @ irq : Interrupt number .
* @ data : interrupt data .
*
* this is common handler for all reserved interrupts .
*/
static irqreturn_t octep_rsvd_intr_handler(int irq, void *data)
{
struct octep_device *oct = data;
return oct->hw_ops.rsvd_intr_handler(oct);
}
/**
* octep_ioq_intr_handler ( ) - handler for all Tx / Rx queue interrupts .
*
* @ irq : Interrupt number .
* @ data : interrupt data contains pointers to Tx / Rx queue private data
* and correspong NAPI context .
*
* this is common handler for all non - queue ( generic ) interrupts .
*/
static irqreturn_t octep_ioq_intr_handler(int irq, void *data)
{
struct octep_ioq_vector *ioq_vector = data;
struct octep_device *oct = ioq_vector->octep_dev;
return oct->hw_ops.ioq_intr_handler(ioq_vector);
}
/**
* octep_request_irqs ( ) - Register interrupt handlers .
*
* @ oct : Octeon device private data structure .
*
* Register handlers for all queue and non - queue interrupts .
*
* Return : 0 , on successful registration of all interrupt handlers .
* - 1 , on any error .
*/
static int octep_request_irqs(struct octep_device *oct)
{
struct net_device *netdev = oct->netdev;
struct octep_ioq_vector *ioq_vector;
struct msix_entry *msix_entry;
char **non_ioq_msix_names;
int num_non_ioq_msix;
int ret, i, j;
num_non_ioq_msix = CFG_GET_NON_IOQ_MSIX(oct->conf);
non_ioq_msix_names = CFG_GET_NON_IOQ_MSIX_NAMES(oct->conf);
oct->non_ioq_irq_names = kcalloc(num_non_ioq_msix,
OCTEP_MSIX_NAME_SIZE, GFP_KERNEL);
if (!oct->non_ioq_irq_names)
goto alloc_err;
/* First few MSI-X interrupts are non-queue interrupts */
for (i = 0 ; i < num_non_ioq_msix; i++) {
char *irq_name;
irq_name = &oct->non_ioq_irq_names[i * OCTEP_MSIX_NAME_SIZE];
msix_entry = &oct->msix_entries[i];
snprintf(irq_name, OCTEP_MSIX_NAME_SIZE,
"%s-%s" , netdev->name, non_ioq_msix_names[i]);
if (!strncmp(non_ioq_msix_names[i], "epf_mbox_rint" , strlen("epf_mbox_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_mbox_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_oei_rint" ,
strlen("epf_oei_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_oei_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_ire_rint" ,
strlen("epf_ire_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_ire_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_ore_rint" ,
strlen("epf_ore_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_ore_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_vfire_rint" ,
strlen("epf_vfire_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_vfire_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_vfore_rint" ,
strlen("epf_vfore_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_vfore_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_dma_rint" ,
strlen("epf_dma_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_dma_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_dma_vf_rint" ,
strlen("epf_dma_vf_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_dma_vf_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_pp_vf_rint" ,
strlen("epf_pp_vf_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_pp_vf_intr_handler, 0 ,
irq_name, oct);
} else if (!strncmp(non_ioq_msix_names[i], "epf_misc_rint" ,
strlen("epf_misc_rint" ))) {
ret = request_irq(msix_entry->vector,
octep_misc_intr_handler, 0 ,
irq_name, oct);
} else {
ret = request_irq(msix_entry->vector,
octep_rsvd_intr_handler, 0 ,
irq_name, oct);
}
if (ret) {
netdev_err(netdev,
"request_irq failed for %s; err=%d" ,
irq_name, ret);
goto non_ioq_irq_err;
}
}
/* Request IRQs for Tx/Rx queues */
for (j = 0 ; j < oct->num_oqs; j++) {
ioq_vector = oct->ioq_vector[j];
msix_entry = &oct->msix_entries[j + num_non_ioq_msix];
snprintf(ioq_vector->name, sizeof (ioq_vector->name),
"%s-q%d" , netdev->name, j);
ret = request_irq(msix_entry->vector,
octep_ioq_intr_handler, 0 ,
ioq_vector->name, ioq_vector);
if (ret) {
netdev_err(netdev,
"request_irq failed for Q-%d; err=%d" ,
j, ret);
goto ioq_irq_err;
}
cpumask_set_cpu(j % num_online_cpus(),
&ioq_vector->affinity_mask);
irq_set_affinity_hint(msix_entry->vector,
&ioq_vector->affinity_mask);
}
return 0 ;
ioq_irq_err:
while (j) {
--j;
ioq_vector = oct->ioq_vector[j];
msix_entry = &oct->msix_entries[j + num_non_ioq_msix];
irq_set_affinity_hint(msix_entry->vector, NULL);
free_irq(msix_entry->vector, ioq_vector);
}
non_ioq_irq_err:
while (i) {
--i;
free_irq(oct->msix_entries[i].vector, oct);
}
kfree(oct->non_ioq_irq_names);
oct->non_ioq_irq_names = NULL;
alloc_err:
return -1 ;
}
/**
* octep_free_irqs ( ) - free all registered interrupts .
*
* @ oct : Octeon device private data structure .
*
* Free all queue and non - queue interrupts of the Octeon device .
*/
static void octep_free_irqs(struct octep_device *oct)
{
int i;
/* First few MSI-X interrupts are non queue interrupts; free them */
for (i = 0 ; i < CFG_GET_NON_IOQ_MSIX(oct->conf); i++)
free_irq(oct->msix_entries[i].vector, oct);
kfree(oct->non_ioq_irq_names);
/* Free IRQs for Input/Output (Tx/Rx) queues */
for (i = CFG_GET_NON_IOQ_MSIX(oct->conf); i < oct->num_irqs; i++) {
irq_set_affinity_hint(oct->msix_entries[i].vector, NULL);
free_irq(oct->msix_entries[i].vector,
oct->ioq_vector[i - CFG_GET_NON_IOQ_MSIX(oct->conf)]);
}
netdev_info(oct->netdev, "IRQs freed\n" );
}
/**
* octep_setup_irqs ( ) - setup interrupts for the Octeon device .
*
* @ oct : Octeon device private data structure .
*
* Allocate data structures to hold per interrupt information , allocate / enable
* MSI - x interrupt and register interrupt handlers .
*
* Return : 0 , on successful allocation and registration of all interrupts .
* - 1 , on any error .
*/
static int octep_setup_irqs(struct octep_device *oct)
{
if (octep_alloc_ioq_vectors(oct))
goto ioq_vector_err;
if (octep_enable_msix_range(oct))
goto enable_msix_err;
if (octep_request_irqs(oct))
goto request_irq_err;
return 0 ;
request_irq_err:
octep_disable_msix(oct);
enable_msix_err:
octep_free_ioq_vectors(oct);
ioq_vector_err:
return -1 ;
}
/**
* octep_clean_irqs ( ) - free all interrupts and its resources .
*
* @ oct : Octeon device private data structure .
*/
static void octep_clean_irqs(struct octep_device *oct)
{
octep_free_irqs(oct);
octep_disable_msix(oct);
octep_free_ioq_vectors(oct);
}
/**
* octep_enable_ioq_irq ( ) - Enable MSI - x interrupt of a Tx / Rx queue .
*
* @ iq : Octeon Tx queue data structure .
* @ oq : Octeon Rx queue data structure .
*/
static void octep_enable_ioq_irq(struct octep_iq *iq, struct octep_oq *oq)
{
u32 pkts_pend = oq->pkts_pending;
netdev_dbg(iq->netdev, "enabling intr for Q-%u\n" , iq->q_no);
if (iq->pkts_processed) {
writel(iq->pkts_processed, iq->inst_cnt_reg);
iq->pkt_in_done -= iq->pkts_processed;
iq->pkts_processed = 0 ;
}
if (oq->last_pkt_count - pkts_pend) {
writel(oq->last_pkt_count - pkts_pend, oq->pkts_sent_reg);
oq->last_pkt_count = pkts_pend;
}
/* Flush the previous wrties before writing to RESEND bit */
wmb();
writeq(1 UL << OCTEP_OQ_INTR_RESEND_BIT, oq->pkts_sent_reg);
writeq(1 UL << OCTEP_IQ_INTR_RESEND_BIT, iq->inst_cnt_reg);
}
/**
* octep_napi_poll ( ) - NAPI poll function for Tx / Rx .
*
* @ napi : pointer to napi context .
* @ budget : max number of packets to be processed in single invocation .
*/
static int octep_napi_poll(struct napi_struct *napi, int budget)
{
struct octep_ioq_vector *ioq_vector =
container_of(napi, struct octep_ioq_vector, napi);
u32 tx_pending, rx_done;
tx_pending = octep_iq_process_completions(ioq_vector->iq, budget);
rx_done = octep_oq_process_rx(ioq_vector->oq, budget);
/* need more polling if tx completion processing is still pending or
* processed at least ' budget ' number of rx packets .
*/
if (tx_pending || rx_done >= budget)
return budget;
napi_complete(napi);
octep_enable_ioq_irq(ioq_vector->iq, ioq_vector->oq);
return rx_done;
}
/**
* octep_napi_add ( ) - Add NAPI poll for all Tx / Rx queues .
*
* @ oct : Octeon device private data structure .
*/
static void octep_napi_add(struct octep_device *oct)
{
int i;
for (i = 0 ; i < oct->num_oqs; i++) {
netdev_dbg(oct->netdev, "Adding NAPI on Q-%d\n" , i);
netif_napi_add(oct->netdev, &oct->ioq_vector[i]->napi,
octep_napi_poll);
oct->oq[i]->napi = &oct->ioq_vector[i]->napi;
}
}
/**
* octep_napi_delete ( ) - delete NAPI poll callback for all Tx / Rx queues .
*
* @ oct : Octeon device private data structure .
*/
static void octep_napi_delete(struct octep_device *oct)
{
int i;
for (i = 0 ; i < oct->num_oqs; i++) {
netdev_dbg(oct->netdev, "Deleting NAPI on Q-%d\n" , i);
netif_napi_del(&oct->ioq_vector[i]->napi);
oct->oq[i]->napi = NULL;
}
}
/**
* octep_napi_enable ( ) - enable NAPI for all Tx / Rx queues .
*
* @ oct : Octeon device private data structure .
*/
static void octep_napi_enable(struct octep_device *oct)
{
int i;
for (i = 0 ; i < oct->num_oqs; i++) {
netdev_dbg(oct->netdev, "Enabling NAPI on Q-%d\n" , i);
napi_enable(&oct->ioq_vector[i]->napi);
}
}
/**
* octep_napi_disable ( ) - disable NAPI for all Tx / Rx queues .
*
* @ oct : Octeon device private data structure .
*/
static void octep_napi_disable(struct octep_device *oct)
{
int i;
for (i = 0 ; i < oct->num_oqs; i++) {
netdev_dbg(oct->netdev, "Disabling NAPI on Q-%d\n" , i);
napi_disable(&oct->ioq_vector[i]->napi);
}
}
static void octep_link_up(struct net_device *netdev)
{
netif_carrier_on(netdev);
netif_tx_start_all_queues(netdev);
}
/**
* octep_open ( ) - start the octeon network device .
*
* @ netdev : pointer to kernel network device .
*
* setup Tx / Rx queues , interrupts and enable hardware operation of Tx / Rx queues
* and interrupts . .
*
* Return : 0 , on successfully setting up device and bring it up .
* - 1 , on any error .
*/
static int octep_open(struct net_device *netdev)
{
struct octep_device *oct = netdev_priv(netdev);
int err, ret;
netdev_info(netdev, "Starting netdev ...\n" );
netif_carrier_off(netdev);
oct->hw_ops.reset_io_queues(oct);
if (octep_setup_iqs(oct))
goto setup_iq_err;
if (octep_setup_oqs(oct))
goto setup_oq_err;
if (octep_setup_irqs(oct))
goto setup_irq_err;
err = netif_set_real_num_tx_queues(netdev, oct->num_oqs);
if (err)
goto set_queues_err;
err = netif_set_real_num_rx_queues(netdev, oct->num_iqs);
if (err)
goto set_queues_err;
octep_napi_add(oct);
octep_napi_enable(oct);
oct->link_info.admin_up = 1 ;
octep_ctrl_net_set_rx_state(oct, OCTEP_CTRL_NET_INVALID_VFID, true ,
false );
octep_ctrl_net_set_link_status(oct, OCTEP_CTRL_NET_INVALID_VFID, true ,
false );
oct->poll_non_ioq_intr = false ;
/* Enable the input and output queues for this Octeon device */
oct->hw_ops.enable_io_queues(oct);
/* Enable Octeon device interrupts */
oct->hw_ops.enable_interrupts(oct);
octep_oq_dbell_init(oct);
ret = octep_ctrl_net_get_link_status(oct, OCTEP_CTRL_NET_INVALID_VFID);
if (ret > 0 )
octep_link_up(netdev);
return 0 ;
set_queues_err:
octep_clean_irqs(oct);
setup_irq_err:
octep_free_oqs(oct);
setup_oq_err:
octep_free_iqs(oct);
setup_iq_err:
return -1 ;
}
/**
* octep_stop ( ) - stop the octeon network device .
*
* @ netdev : pointer to kernel network device .
*
* stop the device Tx / Rx operations , bring down the link and
* free up all resources allocated for Tx / Rx queues and interrupts .
*/
static int octep_stop(struct net_device *netdev)
{
struct octep_device *oct = netdev_priv(netdev);
netdev_info(netdev, "Stopping the device ...\n" );
octep_ctrl_net_set_link_status(oct, OCTEP_CTRL_NET_INVALID_VFID, false ,
false );
octep_ctrl_net_set_rx_state(oct, OCTEP_CTRL_NET_INVALID_VFID, false ,
false );
/* Stop Tx from stack */
netif_tx_stop_all_queues(netdev);
netif_carrier_off(netdev);
netif_tx_disable(netdev);
oct->link_info.admin_up = 0 ;
oct->link_info.oper_up = 0 ;
oct->hw_ops.disable_interrupts(oct);
octep_napi_disable(oct);
octep_napi_delete(oct);
octep_clean_irqs(oct);
octep_clean_iqs(oct);
oct->hw_ops.disable_io_queues(oct);
oct->hw_ops.reset_io_queues(oct);
octep_free_oqs(oct);
octep_free_iqs(oct);
oct->poll_non_ioq_intr = true ;
queue_delayed_work(octep_wq, &oct->intr_poll_task,
msecs_to_jiffies(OCTEP_INTR_POLL_TIME_MSECS));
netdev_info(netdev, "Device stopped !!\n" );
return 0 ;
}
/**
* octep_iq_full_check ( ) - check if a Tx queue is full .
*
* @ iq : Octeon Tx queue data structure .
*
* Return : 0 , if the Tx queue is not full .
* 1 , if the Tx queue is full .
*/
static inline int octep_iq_full_check(struct octep_iq *iq)
{
if (likely((IQ_INSTR_SPACE(iq)) >
OCTEP_WAKE_QUEUE_THRESHOLD))
return 0 ;
/* Stop the queue if unable to send */
netif_stop_subqueue(iq->netdev, iq->q_no);
/* Allow for pending updates in write index
* from iq_process_completion in other cpus
* to reflect , in case queue gets free
* entries .
*/
smp_mb();
/* check again and restart the queue, in case NAPI has just freed
* enough Tx ring entries .
*/
if (unlikely(IQ_INSTR_SPACE(iq) >
OCTEP_WAKE_QUEUE_THRESHOLD)) {
netif_start_subqueue(iq->netdev, iq->q_no);
iq->stats->restart_cnt++;
return 0 ;
}
return 1 ;
}
/**
* octep_start_xmit ( ) - Enqueue packet to Octoen hardware Tx Queue .
*
* @ skb : packet skbuff pointer .
* @ netdev : kernel network device .
*
* Return : NETDEV_TX_BUSY , if Tx Queue is full .
* NETDEV_TX_OK , if successfully enqueued to hardware Tx queue .
*/
static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
struct net_device *netdev)
{
struct octep_device *oct = netdev_priv(netdev);
netdev_features_t feat = netdev->features;
struct octep_tx_sglist_desc *sglist;
struct octep_tx_buffer *tx_buffer;
struct octep_tx_desc_hw *hw_desc;
struct skb_shared_info *shinfo;
struct octep_instr_hdr *ih;
struct octep_iq *iq;
skb_frag_t *frag;
u16 nr_frags, si;
int xmit_more;
u16 q_no, wi;
if (skb_put_padto(skb, ETH_ZLEN))
return NETDEV_TX_OK;
q_no = skb_get_queue_mapping(skb);
if (q_no >= oct->num_iqs) {
netdev_err(netdev, "Invalid Tx skb->queue_mapping=%d\n" , q_no);
q_no = q_no % oct->num_iqs;
}
iq = oct->iq[q_no];
shinfo = skb_shinfo(skb);
nr_frags = shinfo->nr_frags;
wi = iq->host_write_index;
hw_desc = &iq->desc_ring[wi];
hw_desc->ih64 = 0 ;
tx_buffer = iq->buff_info + wi;
tx_buffer->skb = skb;
ih = &hw_desc->ih;
ih->pkind = oct->conf->fw_info.pkind;
ih->fsz = oct->conf->fw_info.fsz;
ih->tlen = skb->len + ih->fsz;
if (!nr_frags) {
tx_buffer->gather = 0 ;
tx_buffer->dma = dma_map_single(iq->dev, skb->data,
skb->len, DMA_TO_DEVICE);
if (dma_mapping_error(iq->dev, tx_buffer->dma))
goto dma_map_err;
hw_desc->dptr = tx_buffer->dma;
} else {
/* Scatter/Gather */
dma_addr_t dma;
u16 len;
sglist = tx_buffer->sglist;
ih->gsz = nr_frags + 1 ;
ih->gather = 1 ;
tx_buffer->gather = 1 ;
len = skb_headlen(skb);
dma = dma_map_single(iq->dev, skb->data, len, DMA_TO_DEVICE);
if (dma_mapping_error(iq->dev, dma))
goto dma_map_err;
memset(sglist, 0 , OCTEP_SGLIST_SIZE_PER_PKT);
sglist[0 ].len[3 ] = len;
sglist[0 ].dma_ptr[0 ] = dma;
si = 1 ; /* entry 0 is main skb, mapped above */
frag = &shinfo->frags[0 ];
while (nr_frags--) {
len = skb_frag_size(frag);
dma = skb_frag_dma_map(iq->dev, frag, 0 ,
len, DMA_TO_DEVICE);
if (dma_mapping_error(iq->dev, dma))
goto dma_map_sg_err;
sglist[si >> 2 ].len[3 - (si & 3 )] = len;
sglist[si >> 2 ].dma_ptr[si & 3 ] = dma;
frag++;
si++;
}
hw_desc->dptr = tx_buffer->sglist_dma;
}
if (oct->conf->fw_info.tx_ol_flags) {
if ((feat & (NETIF_F_TSO)) && (skb_is_gso(skb))) {
hw_desc->txm.ol_flags = OCTEP_TX_OFFLOAD_CKSUM;
hw_desc->txm.ol_flags |= OCTEP_TX_OFFLOAD_TSO;
hw_desc->txm.gso_size = skb_shinfo(skb)->gso_size;
hw_desc->txm.gso_segs = skb_shinfo(skb)->gso_segs;
} else if (feat & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
hw_desc->txm.ol_flags = OCTEP_TX_OFFLOAD_CKSUM;
}
/* due to ESR txm will be swapped by hw */
hw_desc->txm64[0 ] = (__force u64)cpu_to_be64(hw_desc->txm64[0 ]);
}
xmit_more = netdev_xmit_more();
__netdev_tx_sent_queue(iq->netdev_q, skb->len, xmit_more);
skb_tx_timestamp(skb);
iq->fill_cnt++;
wi++;
iq->host_write_index = wi & iq->ring_size_mask;
/* octep_iq_full_check stops the queue and returns
* true if so , in case the queue has become full
* by inserting current packet . If so , we can
* go ahead and ring doorbell .
*/
if (!octep_iq_full_check(iq) && xmit_more &&
iq->fill_cnt < iq->fill_threshold)
return NETDEV_TX_OK;
/* Flush the hw descriptor before writing to doorbell */
wmb();
/* Ring Doorbell to notify the NIC of new packets */
writel(iq->fill_cnt, iq->doorbell_reg);
iq->stats->instr_posted += iq->fill_cnt;
iq->fill_cnt = 0 ;
return NETDEV_TX_OK;
dma_map_sg_err:
if (si > 0 ) {
dma_unmap_single(iq->dev, sglist[0 ].dma_ptr[0 ],
sglist[0 ].len[3 ], DMA_TO_DEVICE);
sglist[0 ].len[3 ] = 0 ;
}
while (si > 1 ) {
dma_unmap_page(iq->dev, sglist[si >> 2 ].dma_ptr[si & 3 ],
sglist[si >> 2 ].len[3 - (si & 3 )], DMA_TO_DEVICE);
sglist[si >> 2 ].len[3 - (si & 3 )] = 0 ;
si--;
}
tx_buffer->gather = 0 ;
dma_map_err:
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
/**
* octep_get_stats64 ( ) - Get Octeon network device statistics .
*
* @ netdev : kernel network device .
* @ stats : pointer to stats structure to be filled in .
*/
static void octep_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct octep_device *oct = netdev_priv(netdev);
u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
int q;
tx_packets = 0 ;
tx_bytes = 0 ;
rx_packets = 0 ;
rx_bytes = 0 ;
for (q = 0 ; q < OCTEP_MAX_QUEUES; q++) {
tx_packets += oct->stats_iq[q].instr_completed;
tx_bytes += oct->stats_iq[q].bytes_sent;
rx_packets += oct->stats_oq[q].packets;
rx_bytes += oct->stats_oq[q].bytes;
}
stats->tx_packets = tx_packets;
stats->tx_bytes = tx_bytes;
stats->rx_packets = rx_packets;
stats->rx_bytes = rx_bytes;
}
/**
* octep_tx_timeout_task - work queue task to Handle Tx queue timeout .
*
* @ work : pointer to Tx queue timeout work_struct
*
* Stop and start the device so that it frees up all queue resources
* and restarts the queues , that potentially clears a Tx queue timeout
* condition .
**/
static void octep_tx_timeout_task(struct work_struct *work)
{
struct octep_device *oct = container_of(work, struct octep_device,
tx_timeout_task);
struct net_device *netdev = oct->netdev;
rtnl_lock();
if (netif_running(netdev)) {
octep_stop(netdev);
octep_open(netdev);
}
rtnl_unlock();
}
/**
* octep_tx_timeout ( ) - Handle Tx Queue timeout .
*
* @ netdev : pointer to kernel network device .
* @ txqueue : Timed out Tx queue number .
*
* Schedule a work to handle Tx queue timeout .
*/
static void octep_tx_timeout(struct net_device *netdev, unsigned int txqueue)
{
struct octep_device *oct = netdev_priv(netdev);
queue_work(octep_wq, &oct->tx_timeout_task);
}
static int octep_set_mac(struct net_device *netdev, void *p)
{
struct octep_device *oct = netdev_priv(netdev);
struct sockaddr *addr = (struct sockaddr *)p;
int err;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
err = octep_ctrl_net_set_mac_addr(oct, OCTEP_CTRL_NET_INVALID_VFID,
addr->sa_data, true );
if (err)
return err;
memcpy(oct->mac_addr, addr->sa_data, ETH_ALEN);
eth_hw_addr_set(netdev, addr->sa_data);
return 0 ;
}
static int octep_change_mtu(struct net_device *netdev, int new_mtu)
{
struct octep_device *oct = netdev_priv(netdev);
struct octep_iface_link_info *link_info;
int err = 0 ;
link_info = &oct->link_info;
if (link_info->mtu == new_mtu)
return 0 ;
err = octep_ctrl_net_set_mtu(oct, OCTEP_CTRL_NET_INVALID_VFID, new_mtu,
true );
if (!err) {
oct->link_info.mtu = new_mtu;
WRITE_ONCE(netdev->mtu, new_mtu);
}
return err;
}
static int octep_set_features(struct net_device *dev, netdev_features_t features)
{
struct octep_ctrl_net_offloads offloads = { 0 };
struct octep_device *oct = netdev_priv(dev);
int err;
/* We only support features received from firmware */
if ((features & dev->hw_features) != features)
return -EINVAL;
if (features & NETIF_F_TSO)
offloads.tx_offloads |= OCTEP_TX_OFFLOAD_TSO;
if (features & NETIF_F_TSO6)
offloads.tx_offloads |= OCTEP_TX_OFFLOAD_TSO;
if (features & NETIF_F_IP_CSUM)
offloads.tx_offloads |= OCTEP_TX_OFFLOAD_CKSUM;
if (features & NETIF_F_IPV6_CSUM)
offloads.tx_offloads |= OCTEP_TX_OFFLOAD_CKSUM;
if (features & NETIF_F_RXCSUM)
offloads.rx_offloads |= OCTEP_RX_OFFLOAD_CKSUM;
err = octep_ctrl_net_set_offloads(oct,
OCTEP_CTRL_NET_INVALID_VFID,
&offloads,
true );
if (!err)
dev->features = features;
return err;
}
static bool octep_is_vf_valid(struct octep_device *oct, int vf)
{
if (vf >= CFG_GET_ACTIVE_VFS(oct->conf)) {
netdev_err(oct->netdev, "Invalid VF ID %d\n" , vf);
return false ;
}
return true ;
}
static int octep_get_vf_config(struct net_device *dev, int vf,
struct ifla_vf_info *ivi)
{
struct octep_device *oct = netdev_priv(dev);
if (!octep_is_vf_valid(oct, vf))
return -EINVAL;
ivi->vf = vf;
ether_addr_copy(ivi->mac, oct->vf_info[vf].mac_addr);
ivi->spoofchk = true ;
ivi->linkstate = IFLA_VF_LINK_STATE_ENABLE;
ivi->trusted = false ;
return 0 ;
}
static int octep_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
{
struct octep_device *oct = netdev_priv(dev);
int err;
if (!octep_is_vf_valid(oct, vf))
return -EINVAL;
if (!is_valid_ether_addr(mac)) {
dev_err(&oct->pdev->dev, "Invalid MAC Address %pM\n" , mac);
return -EADDRNOTAVAIL;
}
dev_dbg(&oct->pdev->dev, "set vf-%d mac to %pM\n" , vf, mac);
ether_addr_copy(oct->vf_info[vf].mac_addr, mac);
oct->vf_info[vf].flags |= OCTEON_PFVF_FLAG_MAC_SET_BY_PF;
err = octep_ctrl_net_set_mac_addr(oct, vf, mac, true );
if (err)
dev_err(&oct->pdev->dev,
"Set VF%d MAC address failed via host control Mbox\n" ,
vf);
return err;
}
static const struct net_device_ops octep_netdev_ops = {
.ndo_open = octep_open,
.ndo_stop = octep_stop,
.ndo_start_xmit = octep_start_xmit,
.ndo_get_stats64 = octep_get_stats64,
.ndo_tx_timeout = octep_tx_timeout,
.ndo_set_mac_address = octep_set_mac,
.ndo_change_mtu = octep_change_mtu,
.ndo_set_features = octep_set_features,
.ndo_get_vf_config = octep_get_vf_config,
.ndo_set_vf_mac = octep_set_vf_mac
};
/**
* octep_intr_poll_task - work queue task to process non - ioq interrupts .
*
* @ work : pointer to mbox work_struct
*
* Process non - ioq interrupts to handle control mailbox , pfvf mailbox .
**/
static void octep_intr_poll_task(struct work_struct *work)
{
struct octep_device *oct = container_of(work, struct octep_device,
intr_poll_task.work);
if (!oct->poll_non_ioq_intr) {
dev_info(&oct->pdev->dev, "Interrupt poll task stopped.\n" );
return ;
}
oct->hw_ops.poll_non_ioq_interrupts(oct);
queue_delayed_work(octep_wq, &oct->intr_poll_task,
msecs_to_jiffies(OCTEP_INTR_POLL_TIME_MSECS));
}
/**
* octep_hb_timeout_task - work queue task to check firmware heartbeat .
*
* @ work : pointer to hb work_struct
*
* Check for heartbeat miss count . Uninitialize oct device if miss count
* exceeds configured max heartbeat miss count .
*
**/
static void octep_hb_timeout_task(struct work_struct *work)
{
struct octep_device *oct = container_of(work, struct octep_device,
hb_task.work);
int miss_cnt;
miss_cnt = atomic_inc_return(&oct->hb_miss_cnt);
if (miss_cnt < oct->conf->fw_info.hb_miss_count) {
queue_delayed_work(octep_wq, &oct->hb_task,
msecs_to_jiffies(oct->conf->fw_info.hb_interval));
return ;
}
dev_err(&oct->pdev->dev, "Missed %u heartbeats. Uninitializing\n" ,
miss_cnt);
rtnl_lock();
if (netif_running(oct->netdev))
dev_close(oct->netdev);
rtnl_unlock();
}
/**
* octep_ctrl_mbox_task - work queue task to handle ctrl mbox messages .
*
* @ work : pointer to ctrl mbox work_struct
*
* Poll ctrl mbox message queue and handle control messages from firmware .
**/
static void octep_ctrl_mbox_task(struct work_struct *work)
{
struct octep_device *oct = container_of(work, struct octep_device,
ctrl_mbox_task);
octep_ctrl_net_recv_fw_messages(oct);
}
static const char *octep_devid_to_str(struct octep_device *oct)
{
switch (oct->chip_id) {
case OCTEP_PCI_DEVICE_ID_CN98_PF:
return "CN98XX" ;
case OCTEP_PCI_DEVICE_ID_CN93_PF:
return "CN93XX" ;
case OCTEP_PCI_DEVICE_ID_CNF95N_PF:
return "CNF95N" ;
case OCTEP_PCI_DEVICE_ID_CN10KA_PF:
return "CN10KA" ;
case OCTEP_PCI_DEVICE_ID_CNF10KA_PF:
return "CNF10KA" ;
case OCTEP_PCI_DEVICE_ID_CNF10KB_PF:
return "CNF10KB" ;
case OCTEP_PCI_DEVICE_ID_CN10KB_PF:
return "CN10KB" ;
default :
return "Unsupported" ;
}
}
/**
* octep_device_setup ( ) - Setup Octeon Device .
*
* @ oct : Octeon device private data structure .
*
* Setup Octeon device hardware operations , configuration , etc . . .
*/
int octep_device_setup(struct octep_device *oct)
{
struct pci_dev *pdev = oct->pdev;
int i, ret;
/* allocate memory for oct->conf */
oct->conf = kzalloc(sizeof (*oct->conf), GFP_KERNEL);
if (!oct->conf)
return -ENOMEM;
/* Map BAR regions */
for (i = 0 ; i < OCTEP_MMIO_REGIONS; i++) {
oct->mmio[i].hw_addr =
ioremap(pci_resource_start(oct->pdev, i * 2 ),
pci_resource_len(oct->pdev, i * 2 ));
if (!oct->mmio[i].hw_addr)
goto unmap_prev;
oct->mmio[i].mapped = 1 ;
}
oct->chip_id = pdev->device;
oct->rev_id = pdev->revision;
dev_info(&pdev->dev, "chip_id = 0x%x\n" , pdev->device);
switch (oct->chip_id) {
case OCTEP_PCI_DEVICE_ID_CN98_PF:
case OCTEP_PCI_DEVICE_ID_CN93_PF:
case OCTEP_PCI_DEVICE_ID_CNF95N_PF:
dev_info(&pdev->dev, "Setting up OCTEON %s PF PASS%d.%d\n" ,
octep_devid_to_str(oct), OCTEP_MAJOR_REV(oct),
OCTEP_MINOR_REV(oct));
octep_device_setup_cn93_pf(oct);
break ;
case OCTEP_PCI_DEVICE_ID_CNF10KA_PF:
case OCTEP_PCI_DEVICE_ID_CN10KA_PF:
case OCTEP_PCI_DEVICE_ID_CNF10KB_PF:
case OCTEP_PCI_DEVICE_ID_CN10KB_PF:
dev_info(&pdev->dev, "Setting up OCTEON %s PF PASS%d.%d\n" ,
octep_devid_to_str(oct), OCTEP_MAJOR_REV(oct), OCTEP_MINOR_REV(oct));
octep_device_setup_cnxk_pf(oct);
break ;
default :
dev_err(&pdev->dev,
"%s: unsupported device\n" , __func__);
goto unsupported_dev;
}
ret = octep_ctrl_net_init(oct);
if (ret)
return ret;
INIT_WORK(&oct->tx_timeout_task, octep_tx_timeout_task);
INIT_WORK(&oct->ctrl_mbox_task, octep_ctrl_mbox_task);
INIT_DELAYED_WORK(&oct->intr_poll_task, octep_intr_poll_task);
oct->poll_non_ioq_intr = true ;
queue_delayed_work(octep_wq, &oct->intr_poll_task,
msecs_to_jiffies(OCTEP_INTR_POLL_TIME_MSECS));
atomic_set(&oct->hb_miss_cnt, 0 );
INIT_DELAYED_WORK(&oct->hb_task, octep_hb_timeout_task);
return 0 ;
unsupported_dev:
i = OCTEP_MMIO_REGIONS;
unmap_prev:
while (i--)
iounmap(oct->mmio[i].hw_addr);
kfree(oct->conf);
return -1 ;
}
/**
* octep_device_cleanup ( ) - Cleanup Octeon Device .
*
* @ oct : Octeon device private data structure .
*
* Cleanup Octeon device allocated resources .
*/
static void octep_device_cleanup(struct octep_device *oct)
{
int i;
oct->poll_non_ioq_intr = false ;
cancel_delayed_work_sync(&oct->intr_poll_task);
cancel_work_sync(&oct->ctrl_mbox_task);
dev_info(&oct->pdev->dev, "Cleaning up Octeon Device ...\n" );
for (i = 0 ; i < OCTEP_MAX_VF; i++) {
vfree(oct->mbox[i]);
oct->mbox[i] = NULL;
}
octep_delete_pfvf_mbox(oct);
octep_ctrl_net_uninit(oct);
cancel_delayed_work_sync(&oct->hb_task);
oct->hw_ops.soft_reset(oct);
for (i = 0 ; i < OCTEP_MMIO_REGIONS; i++) {
if (oct->mmio[i].mapped)
iounmap(oct->mmio[i].hw_addr);
}
kfree(oct->conf);
oct->conf = NULL;
}
static bool get_fw_ready_status(struct pci_dev *pdev)
{
u32 pos = 0 ;
u16 vsec_id;
u8 status;
while ((pos = pci_find_next_ext_capability(pdev, pos,
PCI_EXT_CAP_ID_VNDR))) {
pci_read_config_word(pdev, pos + 4 , &vsec_id);
#define FW_STATUS_VSEC_ID 0 xA3
if (vsec_id != FW_STATUS_VSEC_ID)
continue ;
pci_read_config_byte(pdev, (pos + 8 ), &status);
dev_info(&pdev->dev, "Firmware ready status = %u\n" , status);
#define FW_STATUS_READY 1 ULL
return status == FW_STATUS_READY;
}
return false ;
}
/**
* octep_probe ( ) - Octeon PCI device probe handler .
*
* @ pdev : PCI device structure .
* @ ent : entry in Octeon PCI device ID table .
*
* Initializes and enables the Octeon PCI device for network operations .
* Initializes Octeon private data structure and registers a network device .
*/
static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct octep_device *octep_dev = NULL;
struct net_device *netdev;
int max_rx_pktlen;
int err;
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "Failed to enable PCI device\n" );
return err;
}
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64 ));
if (err) {
dev_err(&pdev->dev, "Failed to set DMA mask !!\n" );
goto err_dma_mask;
}
err = pci_request_mem_regions(pdev, OCTEP_DRV_NAME);
if (err) {
dev_err(&pdev->dev, "Failed to map PCI memory regions\n" );
goto err_pci_regions;
}
pci_set_master(pdev);
if (!get_fw_ready_status(pdev)) {
dev_notice(&pdev->dev, "Firmware not ready; defer probe.\n" );
err = -EPROBE_DEFER;
goto err_alloc_netdev;
}
netdev = alloc_etherdev_mq(sizeof (struct octep_device),
OCTEP_MAX_QUEUES);
if (!netdev) {
dev_err(&pdev->dev, "Failed to allocate netdev\n" );
err = -ENOMEM;
goto err_alloc_netdev;
}
SET_NETDEV_DEV(netdev, &pdev->dev);
octep_dev = netdev_priv(netdev);
octep_dev->netdev = netdev;
octep_dev->pdev = pdev;
octep_dev->dev = &pdev->dev;
pci_set_drvdata(pdev, octep_dev);
err = octep_device_setup(octep_dev);
if (err) {
dev_err(&pdev->dev, "Device setup failed\n" );
goto err_octep_config;
}
err = octep_setup_pfvf_mbox(octep_dev);
if (err) {
dev_err(&pdev->dev, "PF-VF mailbox setup failed\n" );
goto register_dev_err;
}
err = octep_ctrl_net_get_info(octep_dev, OCTEP_CTRL_NET_INVALID_VFID,
&octep_dev->conf->fw_info);
if (err) {
dev_err(&pdev->dev, "Failed to get firmware info\n" );
goto register_dev_err;
}
dev_info(&octep_dev->pdev->dev, "Heartbeat interval %u msecs Heartbeat miss count %u\n" ,
octep_dev->conf->fw_info.hb_interval,
octep_dev->conf->fw_info.hb_miss_count);
queue_delayed_work(octep_wq, &octep_dev->hb_task,
msecs_to_jiffies(octep_dev->conf->fw_info.hb_interval));
netdev->netdev_ops = &octep_netdev_ops;
octep_set_ethtool_ops(netdev);
netif_carrier_off(netdev);
netdev->hw_features = NETIF_F_SG;
if (OCTEP_TX_IP_CSUM(octep_dev->conf->fw_info.tx_ol_flags))
netdev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
if (OCTEP_RX_IP_CSUM(octep_dev->conf->fw_info.rx_ol_flags))
netdev->hw_features |= NETIF_F_RXCSUM;
max_rx_pktlen = octep_ctrl_net_get_mtu(octep_dev, OCTEP_CTRL_NET_INVALID_VFID);
if (max_rx_pktlen < 0 ) {
dev_err(&octep_dev->pdev->dev,
"Failed to get max receive packet size; err = %d\n" , max_rx_pktlen);
err = max_rx_pktlen;
goto register_dev_err;
}
netdev->min_mtu = OCTEP_MIN_MTU;
netdev->max_mtu = max_rx_pktlen - (ETH_HLEN + ETH_FCS_LEN);
netdev->mtu = OCTEP_DEFAULT_MTU;
if (OCTEP_TX_TSO(octep_dev->conf->fw_info.tx_ol_flags)) {
netdev->hw_features |= NETIF_F_TSO;
netif_set_tso_max_size(netdev, netdev->max_mtu);
}
netdev->features |= netdev->hw_features;
err = octep_ctrl_net_get_mac_addr(octep_dev, OCTEP_CTRL_NET_INVALID_VFID,
octep_dev->mac_addr);
if (err) {
dev_err(&pdev->dev, "Failed to get mac address\n" );
goto register_dev_err;
}
eth_hw_addr_set(netdev, octep_dev->mac_addr);
err = register_netdev(netdev);
if (err) {
dev_err(&pdev->dev, "Failed to register netdev\n" );
goto register_dev_err;
}
dev_info(&pdev->dev, "Device probe successful\n" );
return 0 ;
register_dev_err:
octep_device_cleanup(octep_dev);
err_octep_config:
free_netdev(netdev);
err_alloc_netdev:
pci_release_mem_regions(pdev);
err_pci_regions:
err_dma_mask:
pci_disable_device(pdev);
return err;
}
static int octep_sriov_disable(struct octep_device *oct)
{
struct pci_dev *pdev = oct->pdev;
if (pci_vfs_assigned(oct->pdev)) {
dev_warn(&pdev->dev, "Can't disable SRIOV while VFs are assigned\n" );
return -EPERM;
}
pci_disable_sriov(pdev);
CFG_GET_ACTIVE_VFS(oct->conf) = 0 ;
return 0 ;
}
/**
* octep_remove ( ) - Remove Octeon PCI device from driver control .
*
* @ pdev : PCI device structure of the Octeon device .
*
* Cleanup all resources allocated for the Octeon device .
* Unregister from network device and disable the PCI device .
*/
static void octep_remove(struct pci_dev *pdev)
{
struct octep_device *oct = pci_get_drvdata(pdev);
struct net_device *netdev;
if (!oct)
return ;
netdev = oct->netdev;
octep_sriov_disable(oct);
if (netdev->reg_state == NETREG_REGISTERED)
unregister_netdev(netdev);
cancel_work_sync(&oct->tx_timeout_task);
octep_device_cleanup(oct);
pci_release_mem_regions(pdev);
free_netdev(netdev);
pci_disable_device(pdev);
}
static int octep_sriov_enable(struct octep_device *oct, int num_vfs)
{
struct pci_dev *pdev = oct->pdev;
int err;
CFG_GET_ACTIVE_VFS(oct->conf) = num_vfs;
err = pci_enable_sriov(pdev, num_vfs);
if (err) {
dev_warn(&pdev->dev, "Failed to enable SRIOV err=%d\n" , err);
CFG_GET_ACTIVE_VFS(oct->conf) = 0 ;
return err;
}
return num_vfs;
}
static int octep_sriov_configure(struct pci_dev *pdev, int num_vfs)
{
struct octep_device *oct = pci_get_drvdata(pdev);
int max_nvfs;
if (num_vfs == 0 )
return octep_sriov_disable(oct);
max_nvfs = CFG_GET_MAX_VFS(oct->conf);
if (num_vfs > max_nvfs) {
dev_err(&pdev->dev, "Invalid VF count Max supported VFs = %d\n" ,
max_nvfs);
return -EINVAL;
}
return octep_sriov_enable(oct, num_vfs);
}
static struct pci_driver octep_driver = {
.name = OCTEP_DRV_NAME,
.id_table = octep_pci_id_tbl,
.probe = octep_probe,
.remove = octep_remove,
.sriov_configure = octep_sriov_configure,
};
/**
* octep_init_module ( ) - Module initialiation .
*
* create common resource for the driver and register PCI driver .
*/
static int __init octep_init_module(void )
{
int ret;
pr_info("%s: Loading %s ...\n" , OCTEP_DRV_NAME, OCTEP_DRV_STRING);
/* work queue for all deferred tasks */
octep_wq = create_singlethread_workqueue(OCTEP_DRV_NAME);
if (!octep_wq) {
pr_err("%s: Failed to create common workqueue\n" ,
OCTEP_DRV_NAME);
return -ENOMEM;
}
ret = pci_register_driver(&octep_driver);
if (ret < 0 ) {
pr_err("%s: Failed to register PCI driver; err=%d\n" ,
OCTEP_DRV_NAME, ret);
destroy_workqueue(octep_wq);
return ret;
}
pr_info("%s: Loaded successfully !\n" , OCTEP_DRV_NAME);
return ret;
}
/**
* octep_exit_module ( ) - Module exit routine .
*
* unregister the driver with PCI subsystem and cleanup common resources .
*/
static void __exit octep_exit_module(void )
{
pr_info("%s: Unloading ...\n" , OCTEP_DRV_NAME);
pci_unregister_driver(&octep_driver);
destroy_workqueue(octep_wq);
pr_info("%s: Unloading complete\n" , OCTEP_DRV_NAME);
}
module_init(octep_init_module);
module_exit(octep_exit_module);
Messung V0.5 in Prozent C=97 H=82 G=89
¤ Dauer der Verarbeitung: 0.33 Sekunden
(vorverarbeitet am 2026-10-03)
¤
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