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ubuntu-linux-kernel/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c

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/**********************************************************************
* Author: Cavium, Inc.
*
* Contact: support@cavium.com
* Please include "LiquidIO" in the subject.
*
* Copyright (c) 2003-2016 Cavium, Inc.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more details.
***********************************************************************/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <net/vxlan.h>
#include "liquidio_common.h"
#include "octeon_droq.h"
#include "octeon_iq.h"
#include "response_manager.h"
#include "octeon_device.h"
#include "octeon_nic.h"
#include "octeon_main.h"
#include "octeon_network.h"
#include "cn23xx_vf_device.h"
MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Virtual Function Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(LIQUIDIO_VERSION);
static int debug = -1;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
struct liquidio_if_cfg_context {
int octeon_id;
wait_queue_head_t wc;
int cond;
};
struct liquidio_if_cfg_resp {
u64 rh;
struct liquidio_if_cfg_info cfg_info;
u64 status;
};
struct liquidio_rx_ctl_context {
int octeon_id;
wait_queue_head_t wc;
int cond;
};
struct oct_timestamp_resp {
u64 rh;
u64 timestamp;
u64 status;
};
union tx_info {
u64 u64;
struct {
#ifdef __BIG_ENDIAN_BITFIELD
u16 gso_size;
u16 gso_segs;
u32 reserved;
#else
u32 reserved;
u16 gso_segs;
u16 gso_size;
#endif
} s;
};
#define OCTNIC_MAX_SG (MAX_SKB_FRAGS)
#define OCTNIC_GSO_MAX_HEADER_SIZE 128
#define OCTNIC_GSO_MAX_SIZE \
(CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
struct octnic_gather {
/* List manipulation. Next and prev pointers. */
struct list_head list;
/* Size of the gather component at sg in bytes. */
int sg_size;
/* Number of bytes that sg was adjusted to make it 8B-aligned. */
int adjust;
/* Gather component that can accommodate max sized fragment list
* received from the IP layer.
*/
struct octeon_sg_entry *sg;
dma_addr_t sg_dma_ptr;
};
static int
liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void liquidio_vf_remove(struct pci_dev *pdev);
static int octeon_device_init(struct octeon_device *oct);
static int liquidio_stop(struct net_device *netdev);
static int lio_wait_for_oq_pkts(struct octeon_device *oct)
{
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
int retry = MAX_IO_PENDING_PKT_COUNT;
int pkt_cnt = 0, pending_pkts;
int i;
do {
pending_pkts = 0;
for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
if (!(oct->io_qmask.oq & BIT_ULL(i)))
continue;
pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
}
if (pkt_cnt > 0) {
pending_pkts += pkt_cnt;
tasklet_schedule(&oct_priv->droq_tasklet);
}
pkt_cnt = 0;
schedule_timeout_uninterruptible(1);
} while (retry-- && pending_pkts);
return pkt_cnt;
}
/**
* \brief Cause device to go quiet so it can be safely removed/reset/etc
* @param oct Pointer to Octeon device
*/
static void pcierror_quiesce_device(struct octeon_device *oct)
{
int i;
/* Disable the input and output queues now. No more packets will
* arrive from Octeon, but we should wait for all packet processing
* to finish.
*/
/* To allow for in-flight requests */
schedule_timeout_uninterruptible(100);
if (wait_for_pending_requests(oct))
dev_err(&oct->pci_dev->dev, "There were pending requests\n");
/* Force all requests waiting to be fetched by OCTEON to complete. */
for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
struct octeon_instr_queue *iq;
if (!(oct->io_qmask.iq & BIT_ULL(i)))
continue;
iq = oct->instr_queue[i];
if (atomic_read(&iq->instr_pending)) {
spin_lock_bh(&iq->lock);
iq->fill_cnt = 0;
iq->octeon_read_index = iq->host_write_index;
iq->stats.instr_processed +=
atomic_read(&iq->instr_pending);
lio_process_iq_request_list(oct, iq, 0);
spin_unlock_bh(&iq->lock);
}
}
/* Force all pending ordered list requests to time out. */
lio_process_ordered_list(oct, 1);
/* We do not need to wait for output queue packets to be processed. */
}
/**
* \brief Cleanup PCI AER uncorrectable error status
* @param dev Pointer to PCI device
*/
static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
{
u32 status, mask;
int pos = 0x100;
pr_info("%s :\n", __func__);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
if (dev->error_state == pci_channel_io_normal)
status &= ~mask; /* Clear corresponding nonfatal bits */
else
status &= mask; /* Clear corresponding fatal bits */
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
}
/**
* \brief Stop all PCI IO to a given device
* @param dev Pointer to Octeon device
*/
static void stop_pci_io(struct octeon_device *oct)
{
struct msix_entry *msix_entries;
int i;
/* No more instructions will be forwarded. */
atomic_set(&oct->status, OCT_DEV_IN_RESET);
for (i = 0; i < oct->ifcount; i++)
netif_device_detach(oct->props[i].netdev);
/* Disable interrupts */
oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
pcierror_quiesce_device(oct);
if (oct->msix_on) {
msix_entries = (struct msix_entry *)oct->msix_entries;
for (i = 0; i < oct->num_msix_irqs; i++) {
/* clear the affinity_cpumask */
irq_set_affinity_hint(msix_entries[i].vector,
NULL);
free_irq(msix_entries[i].vector,
&oct->ioq_vector[i]);
}
pci_disable_msix(oct->pci_dev);
kfree(oct->msix_entries);
oct->msix_entries = NULL;
octeon_free_ioq_vector(oct);
}
dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
lio_get_state_string(&oct->status));
/* making it a common function for all OCTEON models */
cleanup_aer_uncorrect_error_status(oct->pci_dev);
pci_disable_device(oct->pci_dev);
}
/**
* \brief called when PCI error is detected
* @param pdev Pointer to PCI device
* @param state The current pci connection state
*
* This function is called after a PCI bus error affecting
* this device has been detected.
*/
static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct octeon_device *oct = pci_get_drvdata(pdev);
/* Non-correctable Non-fatal errors */
if (state == pci_channel_io_normal) {
dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
cleanup_aer_uncorrect_error_status(oct->pci_dev);
return PCI_ERS_RESULT_CAN_RECOVER;
}
/* Non-correctable Fatal errors */
dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
stop_pci_io(oct);
return PCI_ERS_RESULT_DISCONNECT;
}
/* For PCI-E Advanced Error Recovery (AER) Interface */
static const struct pci_error_handlers liquidio_vf_err_handler = {
.error_detected = liquidio_pcie_error_detected,
};
static const struct pci_device_id liquidio_vf_pci_tbl[] = {
{
PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
},
{
0, 0, 0, 0, 0, 0, 0
}
};
MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
static struct pci_driver liquidio_vf_pci_driver = {
.name = "LiquidIO_VF",
.id_table = liquidio_vf_pci_tbl,
.probe = liquidio_vf_probe,
.remove = liquidio_vf_remove,
.err_handler = &liquidio_vf_err_handler, /* For AER */
};
/**
* \brief Stop Tx queues
* @param netdev network device
*/
static void txqs_stop(struct net_device *netdev)
{
if (netif_is_multiqueue(netdev)) {
int i;
for (i = 0; i < netdev->num_tx_queues; i++)
netif_stop_subqueue(netdev, i);
} else {
netif_stop_queue(netdev);
}
}
/**
* \brief Start Tx queues
* @param netdev network device
*/
static void txqs_start(struct net_device *netdev)
{
if (netif_is_multiqueue(netdev)) {
int i;
for (i = 0; i < netdev->num_tx_queues; i++)
netif_start_subqueue(netdev, i);
} else {
netif_start_queue(netdev);
}
}
/**
* \brief Wake Tx queues
* @param netdev network device
*/
static void txqs_wake(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
if (netif_is_multiqueue(netdev)) {
int i;
for (i = 0; i < netdev->num_tx_queues; i++) {
int qno = lio->linfo.txpciq[i % lio->oct_dev->num_iqs]
.s.q_no;
if (__netif_subqueue_stopped(netdev, i)) {
INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, qno,
tx_restart, 1);
netif_wake_subqueue(netdev, i);
}
}
} else {
INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
tx_restart, 1);
netif_wake_queue(netdev);
}
}
/**
* \brief Start Tx queue
* @param netdev network device
*/
static void start_txq(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
if (lio->linfo.link.s.link_up) {
txqs_start(netdev);
return;
}
}
/**
* \brief Wake a queue
* @param netdev network device
* @param q which queue to wake
*/
static void wake_q(struct net_device *netdev, int q)
{
if (netif_is_multiqueue(netdev))
netif_wake_subqueue(netdev, q);
else
netif_wake_queue(netdev);
}
/**
* \brief Stop a queue
* @param netdev network device
* @param q which queue to stop
*/
static void stop_q(struct net_device *netdev, int q)
{
if (netif_is_multiqueue(netdev))
netif_stop_subqueue(netdev, q);
else
netif_stop_queue(netdev);
}
/**
* Remove the node at the head of the list. The list would be empty at
* the end of this call if there are no more nodes in the list.
*/
static struct list_head *list_delete_head(struct list_head *root)
{
struct list_head *node;
if ((root->prev == root) && (root->next == root))
node = NULL;
else
node = root->next;
if (node)
list_del(node);
return node;
}
/**
* \brief Delete gather lists
* @param lio per-network private data
*/
static void delete_glists(struct lio *lio)
{
struct octnic_gather *g;
int i;
kfree(lio->glist_lock);
lio->glist_lock = NULL;
if (!lio->glist)
return;
for (i = 0; i < lio->linfo.num_txpciq; i++) {
do {
g = (struct octnic_gather *)
list_delete_head(&lio->glist[i]);
kfree(g);
} while (g);
if (lio->glists_virt_base && lio->glists_virt_base[i] &&
lio->glists_dma_base && lio->glists_dma_base[i]) {
lio_dma_free(lio->oct_dev,
lio->glist_entry_size * lio->tx_qsize,
lio->glists_virt_base[i],
lio->glists_dma_base[i]);
}
}
kfree(lio->glists_virt_base);
lio->glists_virt_base = NULL;
kfree(lio->glists_dma_base);
lio->glists_dma_base = NULL;
kfree(lio->glist);
lio->glist = NULL;
}
/**
* \brief Setup gather lists
* @param lio per-network private data
*/
static int setup_glists(struct lio *lio, int num_iqs)
{
struct octnic_gather *g;
int i, j;
lio->glist_lock =
kzalloc(sizeof(*lio->glist_lock) * num_iqs, GFP_KERNEL);
if (!lio->glist_lock)
return -ENOMEM;
lio->glist =
kzalloc(sizeof(*lio->glist) * num_iqs, GFP_KERNEL);
if (!lio->glist) {
kfree(lio->glist_lock);
lio->glist_lock = NULL;
return -ENOMEM;
}
lio->glist_entry_size =
ROUNDUP8((ROUNDUP4(OCTNIC_MAX_SG) >> 2) * OCT_SG_ENTRY_SIZE);
/* allocate memory to store virtual and dma base address of
* per glist consistent memory
*/
lio->glists_virt_base = kcalloc(num_iqs, sizeof(*lio->glists_virt_base),
GFP_KERNEL);
lio->glists_dma_base = kcalloc(num_iqs, sizeof(*lio->glists_dma_base),
GFP_KERNEL);
if (!lio->glists_virt_base || !lio->glists_dma_base) {
delete_glists(lio);
return -ENOMEM;
}
for (i = 0; i < num_iqs; i++) {
spin_lock_init(&lio->glist_lock[i]);
INIT_LIST_HEAD(&lio->glist[i]);
lio->glists_virt_base[i] =
lio_dma_alloc(lio->oct_dev,
lio->glist_entry_size * lio->tx_qsize,
&lio->glists_dma_base[i]);
if (!lio->glists_virt_base[i]) {
delete_glists(lio);
return -ENOMEM;
}
for (j = 0; j < lio->tx_qsize; j++) {
g = kzalloc(sizeof(*g), GFP_KERNEL);
if (!g)
break;
g->sg = lio->glists_virt_base[i] +
(j * lio->glist_entry_size);
g->sg_dma_ptr = lio->glists_dma_base[i] +
(j * lio->glist_entry_size);
list_add_tail(&g->list, &lio->glist[i]);
}
if (j != lio->tx_qsize) {
delete_glists(lio);
return -ENOMEM;
}
}
return 0;
}
/**
* \brief Print link information
* @param netdev network device
*/
static void print_link_info(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
struct oct_link_info *linfo = &lio->linfo;
if (linfo->link.s.link_up) {
netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
linfo->link.s.speed,
(linfo->link.s.duplex) ? "Full" : "Half");
} else {
netif_info(lio, link, lio->netdev, "Link Down\n");
}
}
}
/**
* \brief Routine to notify MTU change
* @param work work_struct data structure
*/
static void octnet_link_status_change(struct work_struct *work)
{
struct cavium_wk *wk = (struct cavium_wk *)work;
struct lio *lio = (struct lio *)wk->ctxptr;
rtnl_lock();
call_netdevice_notifiers(NETDEV_CHANGEMTU, lio->netdev);
rtnl_unlock();
}
/**
* \brief Sets up the mtu status change work
* @param netdev network device
*/
static int setup_link_status_change_wq(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
lio->link_status_wq.wq = alloc_workqueue("link-status",
WQ_MEM_RECLAIM, 0);
if (!lio->link_status_wq.wq) {
dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
return -1;
}
INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
octnet_link_status_change);
lio->link_status_wq.wk.ctxptr = lio;
return 0;
}
static void cleanup_link_status_change_wq(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
if (lio->link_status_wq.wq) {
cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
destroy_workqueue(lio->link_status_wq.wq);
}
}
/**
* \brief Update link status
* @param netdev network device
* @param ls link status structure
*
* Called on receipt of a link status response from the core application to
* update each interface's link status.
*/
static void update_link_status(struct net_device *netdev,
union oct_link_status *ls)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
lio->linfo.link.u64 = ls->u64;
print_link_info(netdev);
lio->link_changes++;
if (lio->linfo.link.s.link_up) {
netif_carrier_on(netdev);
txqs_wake(netdev);
} else {
netif_carrier_off(netdev);
txqs_stop(netdev);
}
if (lio->linfo.link.s.mtu != netdev->max_mtu) {
dev_info(&oct->pci_dev->dev, "Max MTU Changed from %d to %d\n",
netdev->max_mtu, lio->linfo.link.s.mtu);
netdev->max_mtu = lio->linfo.link.s.mtu;
}
if (lio->linfo.link.s.mtu < netdev->mtu) {
dev_warn(&oct->pci_dev->dev,
"PF has changed the MTU for gmx port. Reducing the mtu from %d to %d\n",
netdev->mtu, lio->linfo.link.s.mtu);
lio->mtu = lio->linfo.link.s.mtu;
netdev->mtu = lio->linfo.link.s.mtu;
queue_delayed_work(lio->link_status_wq.wq,
&lio->link_status_wq.wk.work, 0);
}
}
}
/**
* \brief PCI probe handler
* @param pdev PCI device structure
* @param ent unused
*/
static int
liquidio_vf_probe(struct pci_dev *pdev,
const struct pci_device_id *ent __attribute__((unused)))
{
struct octeon_device *oct_dev = NULL;
oct_dev = octeon_allocate_device(pdev->device,
sizeof(struct octeon_device_priv));
if (!oct_dev) {
dev_err(&pdev->dev, "Unable to allocate device\n");
return -ENOMEM;
}
oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
dev_info(&pdev->dev, "Initializing device %x:%x.\n",
(u32)pdev->vendor, (u32)pdev->device);
/* Assign octeon_device for this device to the private data area. */
pci_set_drvdata(pdev, oct_dev);
/* set linux specific device pointer */
oct_dev->pci_dev = pdev;
if (octeon_device_init(oct_dev)) {
liquidio_vf_remove(pdev);
return -ENOMEM;
}
dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
return 0;
}
/**
* \brief PCI FLR for each Octeon device.
* @param oct octeon device
*/
static void octeon_pci_flr(struct octeon_device *oct)
{
pci_save_state(oct->pci_dev);
pci_cfg_access_lock(oct->pci_dev);
/* Quiesce the device completely */
pci_write_config_word(oct->pci_dev, PCI_COMMAND,
PCI_COMMAND_INTX_DISABLE);
pcie_flr(oct->pci_dev);
pci_cfg_access_unlock(oct->pci_dev);
pci_restore_state(oct->pci_dev);
}
/**
*\brief Destroy resources associated with octeon device
* @param pdev PCI device structure
* @param ent unused
*/
static void octeon_destroy_resources(struct octeon_device *oct)
{
struct msix_entry *msix_entries;
int i;
switch (atomic_read(&oct->status)) {
case OCT_DEV_RUNNING:
case OCT_DEV_CORE_OK:
/* No more instructions will be forwarded. */
atomic_set(&oct->status, OCT_DEV_IN_RESET);
oct->app_mode = CVM_DRV_INVALID_APP;
dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
lio_get_state_string(&oct->status));
schedule_timeout_uninterruptible(HZ / 10);
/* fallthrough */
case OCT_DEV_HOST_OK:
/* fallthrough */
case OCT_DEV_IO_QUEUES_DONE:
if (wait_for_pending_requests(oct))
dev_err(&oct->pci_dev->dev, "There were pending requests\n");
if (lio_wait_for_instr_fetch(oct))
dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
/* Disable the input and output queues now. No more packets will
* arrive from Octeon, but we should wait for all packet
* processing to finish.
*/
oct->fn_list.disable_io_queues(oct);
if (lio_wait_for_oq_pkts(oct))
dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
/* fall through */
case OCT_DEV_INTR_SET_DONE:
/* Disable interrupts */
oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
if (oct->msix_on) {
msix_entries = (struct msix_entry *)oct->msix_entries;
for (i = 0; i < oct->num_msix_irqs; i++) {
if (oct->ioq_vector[i].vector) {
irq_set_affinity_hint(
msix_entries[i].vector,
NULL);
free_irq(msix_entries[i].vector,
&oct->ioq_vector[i]);
oct->ioq_vector[i].vector = 0;
}
}
pci_disable_msix(oct->pci_dev);
kfree(oct->msix_entries);
oct->msix_entries = NULL;
kfree(oct->irq_name_storage);
oct->irq_name_storage = NULL;
}
/* Soft reset the octeon device before exiting */
if (oct->pci_dev->reset_fn)
octeon_pci_flr(oct);
else
cn23xx_vf_ask_pf_to_do_flr(oct);
/* fallthrough */
case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
octeon_free_ioq_vector(oct);
/* fallthrough */
case OCT_DEV_MBOX_SETUP_DONE:
oct->fn_list.free_mbox(oct);
/* fallthrough */
case OCT_DEV_IN_RESET:
case OCT_DEV_DROQ_INIT_DONE:
mdelay(100);
for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
if (!(oct->io_qmask.oq & BIT_ULL(i)))
continue;
octeon_delete_droq(oct, i);
}
/* fallthrough */
case OCT_DEV_RESP_LIST_INIT_DONE:
octeon_delete_response_list(oct);
/* fallthrough */
case OCT_DEV_INSTR_QUEUE_INIT_DONE:
for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
if (!(oct->io_qmask.iq & BIT_ULL(i)))
continue;
octeon_delete_instr_queue(oct, i);
}
/* fallthrough */
case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
octeon_free_sc_buffer_pool(oct);
/* fallthrough */
case OCT_DEV_DISPATCH_INIT_DONE:
octeon_delete_dispatch_list(oct);
cancel_delayed_work_sync(&oct->nic_poll_work.work);
/* fallthrough */
case OCT_DEV_PCI_MAP_DONE:
octeon_unmap_pci_barx(oct, 0);
octeon_unmap_pci_barx(oct, 1);
/* fallthrough */
case OCT_DEV_PCI_ENABLE_DONE:
pci_clear_master(oct->pci_dev);
/* Disable the device, releasing the PCI INT */
pci_disable_device(oct->pci_dev);
/* fallthrough */
case OCT_DEV_BEGIN_STATE:
/* Nothing to be done here either */
break;
}
}
/**
* \brief Callback for rx ctrl
* @param status status of request
* @param buf pointer to resp structure
*/
static void rx_ctl_callback(struct octeon_device *oct,
u32 status, void *buf)
{
struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
struct liquidio_rx_ctl_context *ctx;
ctx = (struct liquidio_rx_ctl_context *)sc->ctxptr;
oct = lio_get_device(ctx->octeon_id);
if (status)
dev_err(&oct->pci_dev->dev, "rx ctl instruction failed. Status: %llx\n",
CVM_CAST64(status));
WRITE_ONCE(ctx->cond, 1);
/* This barrier is required to be sure that the response has been
* written fully before waking up the handler
*/
wmb();
wake_up_interruptible(&ctx->wc);
}
/**
* \brief Send Rx control command
* @param lio per-network private data
* @param start_stop whether to start or stop
*/
static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
{
struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
int ctx_size = sizeof(struct liquidio_rx_ctl_context);
struct liquidio_rx_ctl_context *ctx;
struct octeon_soft_command *sc;
union octnet_cmd *ncmd;
int retval;
if (oct->props[lio->ifidx].rx_on == start_stop)
return;
sc = (struct octeon_soft_command *)
octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
16, ctx_size);
ncmd = (union octnet_cmd *)sc->virtdptr;
ctx = (struct liquidio_rx_ctl_context *)sc->ctxptr;
WRITE_ONCE(ctx->cond, 0);
ctx->octeon_id = lio_get_device_id(oct);
init_waitqueue_head(&ctx->wc);
ncmd->u64 = 0;
ncmd->s.cmd = OCTNET_CMD_RX_CTL;
ncmd->s.param1 = start_stop;
octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
sc->iq_no = lio->linfo.txpciq[0].s.q_no;
octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
OPCODE_NIC_CMD, 0, 0, 0);
sc->callback = rx_ctl_callback;
sc->callback_arg = sc;
sc->wait_time = 5000;
retval = octeon_send_soft_command(oct, sc);
if (retval == IQ_SEND_FAILED) {
netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
} else {
/* Sleep on a wait queue till the cond flag indicates that the
* response arrived or timed-out.
*/
if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR)
return;
oct->props[lio->ifidx].rx_on = start_stop;
}
octeon_free_soft_command(oct, sc);
}
/**
* \brief Destroy NIC device interface
* @param oct octeon device
* @param ifidx which interface to destroy
*
* Cleanup associated with each interface for an Octeon device when NIC
* module is being unloaded or if initialization fails during load.
*/
static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
{
struct net_device *netdev = oct->props[ifidx].netdev;
struct napi_struct *napi, *n;
struct lio *lio;
if (!netdev) {
dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
__func__, ifidx);
return;
}
lio = GET_LIO(netdev);
dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
liquidio_stop(netdev);
if (oct->props[lio->ifidx].napi_enabled == 1) {
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
napi_disable(napi);
oct->props[lio->ifidx].napi_enabled = 0;
oct->droq[0]->ops.poll_mode = 0;
}
/* Delete NAPI */
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
netif_napi_del(napi);
if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
unregister_netdev(netdev);
cleanup_rx_oom_poll_fn(netdev);
cleanup_link_status_change_wq(netdev);
delete_glists(lio);
free_netdev(netdev);
oct->props[ifidx].gmxport = -1;
oct->props[ifidx].netdev = NULL;
}
/**
* \brief Stop complete NIC functionality
* @param oct octeon device
*/
static int liquidio_stop_nic_module(struct octeon_device *oct)
{
struct lio *lio;
int i, j;
dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
if (!oct->ifcount) {
dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
return 1;
}
spin_lock_bh(&oct->cmd_resp_wqlock);
oct->cmd_resp_state = OCT_DRV_OFFLINE;
spin_unlock_bh(&oct->cmd_resp_wqlock);
for (i = 0; i < oct->ifcount; i++) {
lio = GET_LIO(oct->props[i].netdev);
for (j = 0; j < oct->num_oqs; j++)
octeon_unregister_droq_ops(oct,
lio->linfo.rxpciq[j].s.q_no);
}
for (i = 0; i < oct->ifcount; i++)
liquidio_destroy_nic_device(oct, i);
dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
return 0;
}
/**
* \brief Cleans up resources at unload time
* @param pdev PCI device structure
*/
static void liquidio_vf_remove(struct pci_dev *pdev)
{
struct octeon_device *oct_dev = pci_get_drvdata(pdev);
dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
if (oct_dev->app_mode == CVM_DRV_NIC_APP)
liquidio_stop_nic_module(oct_dev);
/* Reset the octeon device and cleanup all memory allocated for
* the octeon device by driver.
*/
octeon_destroy_resources(oct_dev);
dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
/* This octeon device has been removed. Update the global
* data structure to reflect this. Free the device structure.
*/
octeon_free_device_mem(oct_dev);
}
/**
* \brief PCI initialization for each Octeon device.
* @param oct octeon device
*/
static int octeon_pci_os_setup(struct octeon_device *oct)
{
#ifdef CONFIG_PCI_IOV
/* setup PCI stuff first */
if (!oct->pci_dev->physfn)
octeon_pci_flr(oct);
#endif
if (pci_enable_device(oct->pci_dev)) {
dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
return 1;
}
if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
pci_disable_device(oct->pci_dev);
return 1;
}
/* Enable PCI DMA Master. */
pci_set_master(oct->pci_dev);
return 0;
}
static int skb_iq(struct lio *lio, struct sk_buff *skb)
{
int q = 0;
if (netif_is_multiqueue(lio->netdev))
q = skb->queue_mapping % lio->linfo.num_txpciq;
return q;
}
/**
* \brief Check Tx queue state for a given network buffer
* @param lio per-network private data
* @param skb network buffer
*/
static int check_txq_state(struct lio *lio, struct sk_buff *skb)
{
int q = 0, iq = 0;
if (netif_is_multiqueue(lio->netdev)) {
q = skb->queue_mapping;
iq = lio->linfo.txpciq[q % lio->oct_dev->num_iqs].s.q_no;
} else {
iq = lio->txq;
q = iq;
}
if (octnet_iq_is_full(lio->oct_dev, iq))
return 0;
if (__netif_subqueue_stopped(lio->netdev, q)) {
INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq, tx_restart, 1);
wake_q(lio->netdev, q);
}
return 1;
}
/**
* \brief Unmap and free network buffer
* @param buf buffer
*/
static void free_netbuf(void *buf)
{
struct octnet_buf_free_info *finfo;
struct sk_buff *skb;
struct lio *lio;
finfo = (struct octnet_buf_free_info *)buf;
skb = finfo->skb;
lio = finfo->lio;
dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
DMA_TO_DEVICE);
check_txq_state(lio, skb);
tx_buffer_free(skb);
}
/**
* \brief Unmap and free gather buffer
* @param buf buffer
*/
static void free_netsgbuf(void *buf)
{
struct octnet_buf_free_info *finfo;
struct octnic_gather *g;
struct sk_buff *skb;
int i, frags, iq;
struct lio *lio;
finfo = (struct octnet_buf_free_info *)buf;
skb = finfo->skb;
lio = finfo->lio;
g = finfo->g;
frags = skb_shinfo(skb)->nr_frags;
dma_unmap_single(&lio->oct_dev->pci_dev->dev,
g->sg[0].ptr[0], (skb->len - skb->data_len),
DMA_TO_DEVICE);
i = 1;
while (frags--) {
struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
pci_unmap_page((lio->oct_dev)->pci_dev,
g->sg[(i >> 2)].ptr[(i & 3)],
frag->size, DMA_TO_DEVICE);
i++;
}
iq = skb_iq(lio, skb);
spin_lock(&lio->glist_lock[iq]);
list_add_tail(&g->list, &lio->glist[iq]);
spin_unlock(&lio->glist_lock[iq]);
check_txq_state(lio, skb); /* mq support: sub-queue state check */
tx_buffer_free(skb);
}
/**
* \brief Unmap and free gather buffer with response
* @param buf buffer
*/
static void free_netsgbuf_with_resp(void *buf)
{
struct octnet_buf_free_info *finfo;
struct octeon_soft_command *sc;
struct octnic_gather *g;
struct sk_buff *skb;
int i, frags, iq;
struct lio *lio;
sc = (struct octeon_soft_command *)buf;
skb = (struct sk_buff *)sc->callback_arg;
finfo = (struct octnet_buf_free_info *)&skb->cb;
lio = finfo->lio;
g = finfo->g;
frags = skb_shinfo(skb)->nr_frags;
dma_unmap_single(&lio->oct_dev->pci_dev->dev,
g->sg[0].ptr[0], (skb->len - skb->data_len),
DMA_TO_DEVICE);
i = 1;
while (frags--) {
struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
pci_unmap_page((lio->oct_dev)->pci_dev,
g->sg[(i >> 2)].ptr[(i & 3)],
frag->size, DMA_TO_DEVICE);
i++;
}
iq = skb_iq(lio, skb);
spin_lock(&lio->glist_lock[iq]);
list_add_tail(&g->list, &lio->glist[iq]);
spin_unlock(&lio->glist_lock[iq]);
/* Don't free the skb yet */
check_txq_state(lio, skb);
}
/**
* \brief Callback for getting interface configuration
* @param status status of request
* @param buf pointer to resp structure
*/
static void if_cfg_callback(struct octeon_device *oct,
u32 status __attribute__((unused)), void *buf)
{
struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
struct liquidio_if_cfg_context *ctx;
struct liquidio_if_cfg_resp *resp;
resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
ctx = (struct liquidio_if_cfg_context *)sc->ctxptr;
oct = lio_get_device(ctx->octeon_id);
if (resp->status)
dev_err(&oct->pci_dev->dev, "nic if cfg instruction failed. Status: %llx\n",
CVM_CAST64(resp->status));
WRITE_ONCE(ctx->cond, 1);
snprintf(oct->fw_info.liquidio_firmware_version, 32, "%s",
resp->cfg_info.liquidio_firmware_version);
/* This barrier is required to be sure that the response has been
* written fully before waking up the handler
*/
wmb();
wake_up_interruptible(&ctx->wc);
}
/**
* \brief Net device open for LiquidIO
* @param netdev network device
*/
static int liquidio_open(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct napi_struct *napi, *n;
if (!oct->props[lio->ifidx].napi_enabled) {
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
napi_enable(napi);
oct->props[lio->ifidx].napi_enabled = 1;
oct->droq[0]->ops.poll_mode = 1;
}
ifstate_set(lio, LIO_IFSTATE_RUNNING);
/* Ready for link status updates */
lio->intf_open = 1;
netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
start_txq(netdev);
/* tell Octeon to start forwarding packets to host */
send_rx_ctrl_cmd(lio, 1);
dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
return 0;
}
/**
* \brief Net device stop for LiquidIO
* @param netdev network device
*/
static int liquidio_stop(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct napi_struct *napi, *n;
/* tell Octeon to stop forwarding packets to host */
send_rx_ctrl_cmd(lio, 0);
if (oct->props[lio->ifidx].napi_enabled) {
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
napi_disable(napi);
oct->props[lio->ifidx].napi_enabled = 0;
oct->droq[0]->ops.poll_mode = 0;
}
netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
/* Inform that netif carrier is down */
lio->intf_open = 0;
lio->linfo.link.s.link_up = 0;
netif_carrier_off(netdev);
lio->link_changes++;
ifstate_reset(lio, LIO_IFSTATE_RUNNING);
txqs_stop(netdev);
dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
return 0;
}
/**
* \brief Converts a mask based on net device flags
* @param netdev network device
*
* This routine generates a octnet_ifflags mask from the net device flags
* received from the OS.
*/
static enum octnet_ifflags get_new_flags(struct net_device *netdev)
{
enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
if (netdev->flags & IFF_PROMISC)
f |= OCTNET_IFFLAG_PROMISC;
if (netdev->flags & IFF_ALLMULTI)
f |= OCTNET_IFFLAG_ALLMULTI;
if (netdev->flags & IFF_MULTICAST) {
f |= OCTNET_IFFLAG_MULTICAST;
/* Accept all multicast addresses if there are more than we
* can handle
*/
if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
f |= OCTNET_IFFLAG_ALLMULTI;
}
if (netdev->flags & IFF_BROADCAST)
f |= OCTNET_IFFLAG_BROADCAST;
return f;
}
static void liquidio_set_uc_list(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octnic_ctrl_pkt nctrl;
struct netdev_hw_addr *ha;
u64 *mac;
if (lio->netdev_uc_count == netdev_uc_count(netdev))
return;
if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
return;
}
lio->netdev_uc_count = netdev_uc_count(netdev);
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
nctrl.ncmd.s.more = lio->netdev_uc_count;
nctrl.ncmd.s.param1 = oct->vf_num;
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
/* copy all the addresses into the udd */
mac = &nctrl.udd[0];
netdev_for_each_uc_addr(ha, netdev) {
ether_addr_copy(((u8 *)mac) + 2, ha->addr);
mac++;
}
octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
}
/**
* \brief Net device set_multicast_list
* @param netdev network device
*/
static void liquidio_set_mcast_list(struct net_device *netdev)
{
int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octnic_ctrl_pkt nctrl;
struct netdev_hw_addr *ha;
u64 *mc;
int ret;
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
/* Create a ctrl pkt command to be sent to core app. */
nctrl.ncmd.u64 = 0;
nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
nctrl.ncmd.s.param1 = get_new_flags(netdev);
nctrl.ncmd.s.param2 = mc_count;
nctrl.ncmd.s.more = mc_count;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
/* copy all the addresses into the udd */
mc = &nctrl.udd[0];
netdev_for_each_mc_addr(ha, netdev) {
*mc = 0;
ether_addr_copy(((u8 *)mc) + 2, ha->addr);
/* no need to swap bytes */
if (++mc > &nctrl.udd[mc_count])
break;
}
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
/* Apparently, any activity in this call from the kernel has to
* be atomic. So we won't wait for response.
*/
nctrl.wait_time = 0;
ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
if (ret < 0) {
dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
ret);
}
liquidio_set_uc_list(netdev);
}
/**
* \brief Net device set_mac_address
* @param netdev network device
*/
static int liquidio_set_mac(struct net_device *netdev, void *p)
{
struct sockaddr *addr = (struct sockaddr *)p;
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octnic_ctrl_pkt nctrl;
int ret = 0;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
return 0;
if (lio->linfo.macaddr_is_admin_asgnd)
return -EPERM;
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
nctrl.ncmd.u64 = 0;
nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
nctrl.ncmd.s.param1 = 0;
nctrl.ncmd.s.more = 1;
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
nctrl.wait_time = 100;
nctrl.udd[0] = 0;
/* The MAC Address is presented in network byte order. */
ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
if (ret < 0) {
dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
return -ENOMEM;
}
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
return 0;
}
/**
* \brief Net device get_stats
* @param netdev network device
*/
static struct net_device_stats *liquidio_get_stats(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct net_device_stats *stats = &netdev->stats;
u64 pkts = 0, drop = 0, bytes = 0;
struct oct_droq_stats *oq_stats;
struct oct_iq_stats *iq_stats;
struct octeon_device *oct;
int i, iq_no, oq_no;
oct = lio->oct_dev;
if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
return stats;
for (i = 0; i < oct->num_iqs; i++) {
iq_no = lio->linfo.txpciq[i].s.q_no;
iq_stats = &oct->instr_queue[iq_no]->stats;
pkts += iq_stats->tx_done;
drop += iq_stats->tx_dropped;
bytes += iq_stats->tx_tot_bytes;
}
stats->tx_packets = pkts;
stats->tx_bytes = bytes;
stats->tx_dropped = drop;
pkts = 0;
drop = 0;
bytes = 0;
for (i = 0; i < oct->num_oqs; i++) {
oq_no = lio->linfo.rxpciq[i].s.q_no;
oq_stats = &oct->droq[oq_no]->stats;
pkts += oq_stats->rx_pkts_received;
drop += (oq_stats->rx_dropped +
oq_stats->dropped_nodispatch +
oq_stats->dropped_toomany +
oq_stats->dropped_nomem);
bytes += oq_stats->rx_bytes_received;
}
stats->rx_bytes = bytes;
stats->rx_packets = pkts;
stats->rx_dropped = drop;
return stats;
}
/**
* \brief Net device change_mtu
* @param netdev network device
*/
static int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
{
struct octnic_ctrl_pkt nctrl;
struct octeon_device *oct;
struct lio *lio;
int ret = 0;
lio = GET_LIO(netdev);
oct = lio->oct_dev;
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
nctrl.ncmd.u64 = 0;
nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MTU;
nctrl.ncmd.s.param1 = new_mtu;
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
nctrl.wait_time = LIO_CMD_WAIT_TM;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
if (ret < 0) {
dev_err(&oct->pci_dev->dev, "Failed to set MTU\n");
return -EIO;
}
lio->mtu = new_mtu;
return 0;
}
/**
* \brief Handler for SIOCSHWTSTAMP ioctl
* @param netdev network device
* @param ifr interface request
* @param cmd command
*/
static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
{
struct lio *lio = GET_LIO(netdev);
struct hwtstamp_config conf;
if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
return -EFAULT;
if (conf.flags)
return -EINVAL;
switch (conf.tx_type) {
case HWTSTAMP_TX_ON:
case HWTSTAMP_TX_OFF:
break;
default:
return -ERANGE;
}
switch (conf.rx_filter) {
case HWTSTAMP_FILTER_NONE:
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_SOME:
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
case HWTSTAMP_FILTER_NTP_ALL:
conf.rx_filter = HWTSTAMP_FILTER_ALL;
break;
default:
return -ERANGE;
}
if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
else
ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
}
/**
* \brief ioctl handler
* @param netdev network device
* @param ifr interface request
* @param cmd command
*/
static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
switch (cmd) {
case SIOCSHWTSTAMP:
return hwtstamp_ioctl(netdev, ifr);
default:
return -EOPNOTSUPP;
}
}
static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
{
struct sk_buff *skb = (struct sk_buff *)buf;
struct octnet_buf_free_info *finfo;
struct oct_timestamp_resp *resp;
struct octeon_soft_command *sc;
struct lio *lio;
finfo = (struct octnet_buf_free_info *)skb->cb;
lio = finfo->lio;
sc = finfo->sc;
oct = lio->oct_dev;
resp = (struct oct_timestamp_resp *)sc->virtrptr;
if (status != OCTEON_REQUEST_DONE) {
dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
CVM_CAST64(status));
resp->timestamp = 0;
}
octeon_swap_8B_data(&resp->timestamp, 1);
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
struct skb_shared_hwtstamps ts;
u64 ns = resp->timestamp;
netif_info(lio, tx_done, lio->netdev,
"Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
skb, (unsigned long long)ns);
ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
skb_tstamp_tx(skb, &ts);
}
octeon_free_soft_command(oct, sc);
tx_buffer_free(skb);
}
/* \brief Send a data packet that will be timestamped
* @param oct octeon device
* @param ndata pointer to network data
* @param finfo pointer to private network data
*/
static int send_nic_timestamp_pkt(struct octeon_device *oct,
struct octnic_data_pkt *ndata,
struct octnet_buf_free_info *finfo,
int xmit_more)
{
struct octeon_soft_command *sc;
int ring_doorbell;
struct lio *lio;
int retval;
u32 len;
lio = finfo->lio;
sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
sizeof(struct oct_timestamp_resp));
finfo->sc = sc;
if (!sc) {
dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
return IQ_SEND_FAILED;
}
if (ndata->reqtype == REQTYPE_NORESP_NET)
ndata->reqtype = REQTYPE_RESP_NET;
else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
ndata->reqtype = REQTYPE_RESP_NET_SG;
sc->callback = handle_timestamp;
sc->callback_arg = finfo->skb;
sc->iq_no = ndata->q_no;
len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
ring_doorbell = !xmit_more;
retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
sc, len, ndata->reqtype);
if (retval == IQ_SEND_FAILED) {
dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
retval);
octeon_free_soft_command(oct, sc);
} else {
netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
}
return retval;
}
/** \brief Transmit networks packets to the Octeon interface
* @param skbuff skbuff struct to be passed to network layer.
* @param netdev pointer to network device
* @returns whether the packet was transmitted to the device okay or not
* (NETDEV_TX_OK or NETDEV_TX_BUSY)
*/
static int liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct octnet_buf_free_info *finfo;
union octnic_cmd_setup cmdsetup;
struct octnic_data_pkt ndata;
struct octeon_instr_irh *irh;
struct oct_iq_stats *stats;
struct octeon_device *oct;
int q_idx = 0, iq_no = 0;
union tx_info *tx_info;
int xmit_more = 0;
struct lio *lio;
int status = 0;
u64 dptr = 0;
u32 tag = 0;
int j;
lio = GET_LIO(netdev);
oct = lio->oct_dev;
if (netif_is_multiqueue(netdev)) {
q_idx = skb->queue_mapping;
q_idx = (q_idx % (lio->linfo.num_txpciq));
tag = q_idx;
iq_no = lio->linfo.txpciq[q_idx].s.q_no;
} else {
iq_no = lio->txq;
}
stats = &oct->instr_queue[iq_no]->stats;
/* Check for all conditions in which the current packet cannot be
* transmitted.
*/
if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
(!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
lio->linfo.link.s.link_up);
goto lio_xmit_failed;
}
/* Use space in skb->cb to store info used to unmap and
* free the buffers.
*/
finfo = (struct octnet_buf_free_info *)skb->cb;
finfo->lio = lio;
finfo->skb = skb;
finfo->sc = NULL;
/* Prepare the attributes for the data to be passed to OSI. */
memset(&ndata, 0, sizeof(struct octnic_data_pkt));
ndata.buf = finfo;
ndata.q_no = iq_no;
if (netif_is_multiqueue(netdev)) {
if (octnet_iq_is_full(oct, ndata.q_no)) {
/* defer sending if queue is full */
netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
ndata.q_no);
stats->tx_iq_busy++;
return NETDEV_TX_BUSY;
}
} else {
if (octnet_iq_is_full(oct, lio->txq)) {
/* defer sending if queue is full */
stats->tx_iq_busy++;
netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
ndata.q_no);
return NETDEV_TX_BUSY;
}
}
ndata.datasize = skb->len;
cmdsetup.u64 = 0;
cmdsetup.s.iq_no = iq_no;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
if (skb->encapsulation) {
cmdsetup.s.tnl_csum = 1;
stats->tx_vxlan++;
} else {
cmdsetup.s.transport_csum = 1;
}
}
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
cmdsetup.s.timestamp = 1;
}
if (!skb_shinfo(skb)->nr_frags) {
cmdsetup.s.u.datasize = skb->len;
octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
/* Offload checksum calculation for TCP/UDP packets */
dptr = dma_map_single(&oct->pci_dev->dev,
skb->data,
skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
__func__);
return NETDEV_TX_BUSY;
}
ndata.cmd.cmd3.dptr = dptr;
finfo->dptr = dptr;
ndata.reqtype = REQTYPE_NORESP_NET;
} else {
struct skb_frag_struct *frag;
struct octnic_gather *g;
int i, frags;
spin_lock(&lio->glist_lock[q_idx]);
g = (struct octnic_gather *)list_delete_head(
&lio->glist[q_idx]);
spin_unlock(&lio->glist_lock[q_idx]);
if (!g) {
netif_info(lio, tx_err, lio->netdev,
"Transmit scatter gather: glist null!\n");
goto lio_xmit_failed;
}
cmdsetup.s.gather = 1;
cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
memset(g->sg, 0, g->sg_size);
g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
skb->data,
(skb->len - skb->data_len),
DMA_TO_DEVICE);
if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
__func__);
return NETDEV_TX_BUSY;
}
add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
frags = skb_shinfo(skb)->nr_frags;
i = 1;
while (frags--) {
frag = &skb_shinfo(skb)->frags[i - 1];
g->sg[(i >> 2)].ptr[(i & 3)] =
dma_map_page(&oct->pci_dev->dev,
frag->page.p,
frag->page_offset,
frag->size,
DMA_TO_DEVICE);
if (dma_mapping_error(&oct->pci_dev->dev,
g->sg[i >> 2].ptr[i & 3])) {
dma_unmap_single(&oct->pci_dev->dev,
g->sg[0].ptr[0],
skb->len - skb->data_len,
DMA_TO_DEVICE);
for (j = 1; j < i; j++) {
frag = &skb_shinfo(skb)->frags[j - 1];
dma_unmap_page(&oct->pci_dev->dev,
g->sg[j >> 2].ptr[j & 3],
frag->size,
DMA_TO_DEVICE);
}
dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
__func__);
return NETDEV_TX_BUSY;
}
add_sg_size(&g->sg[(i >> 2)], frag->size, (i & 3));
i++;
}
dptr = g->sg_dma_ptr;
ndata.cmd.cmd3.dptr = dptr;
finfo->dptr = dptr;
finfo->g = g;
ndata.reqtype = REQTYPE_NORESP_NET_SG;
}
irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
if (skb_shinfo(skb)->gso_size) {
tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
}
/* HW insert VLAN tag */
if (skb_vlan_tag_present(skb)) {
irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
}
xmit_more = skb->xmit_more;
if (unlikely(cmdsetup.s.timestamp))
status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
else
status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
if (status == IQ_SEND_FAILED)
goto lio_xmit_failed;
netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
if (status == IQ_SEND_STOP) {
dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
iq_no);
stop_q(netdev, q_idx);
}
netif_trans_update(netdev);
if (tx_info->s.gso_segs)
stats->tx_done += tx_info->s.gso_segs;
else
stats->tx_done++;
stats->tx_tot_bytes += ndata.datasize;
return NETDEV_TX_OK;
lio_xmit_failed:
stats->tx_dropped++;
netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
iq_no, stats->tx_dropped);
if (dptr)
dma_unmap_single(&oct->pci_dev->dev, dptr,
ndata.datasize, DMA_TO_DEVICE);
octeon_ring_doorbell_locked(oct, iq_no);
tx_buffer_free(skb);
return NETDEV_TX_OK;
}
/** \brief Network device Tx timeout
* @param netdev pointer to network device
*/
static void liquidio_tx_timeout(struct net_device *netdev)
{
struct lio *lio;
lio = GET_LIO(netdev);
netif_info(lio, tx_err, lio->netdev,
"Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
netdev->stats.tx_dropped);
netif_trans_update(netdev);
txqs_wake(netdev);
}
static int
liquidio_vlan_rx_add_vid(struct net_device *netdev,
__be16 proto __attribute__((unused)), u16 vid)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octnic_ctrl_pkt nctrl;
struct completion compl;
u16 response_code;
int ret = 0;
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
nctrl.ncmd.u64 = 0;
nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
nctrl.ncmd.s.param1 = vid;
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
nctrl.wait_time = 100;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
init_completion(&compl);
nctrl.completion = &compl;
nctrl.response_code = &response_code;
ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
if (ret < 0) {
dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
ret);
return -EIO;
}
if (!wait_for_completion_timeout(&compl,
msecs_to_jiffies(nctrl.wait_time)))
return -EPERM;
if (READ_ONCE(response_code))
return -EPERM;
return 0;
}
static int
liquidio_vlan_rx_kill_vid(struct net_device *netdev,
__be16 proto __attribute__((unused)), u16 vid)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octnic_ctrl_pkt nctrl;
int ret = 0;
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
nctrl.ncmd.u64 = 0;
nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
nctrl.ncmd.s.param1 = vid;
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
nctrl.wait_time = 100;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
if (ret < 0) {
dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
ret);
}
return ret;
}
/** Sending command to enable/disable RX checksum offload
* @param netdev pointer to network device
* @param command OCTNET_CMD_TNL_RX_CSUM_CTL
* @param rx_cmd_bit OCTNET_CMD_RXCSUM_ENABLE/
* OCTNET_CMD_RXCSUM_DISABLE
* @returns SUCCESS or FAILURE
*/
static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
u8 rx_cmd)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octnic_ctrl_pkt nctrl;
int ret = 0;
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
nctrl.ncmd.u64 = 0;
nctrl.ncmd.s.cmd = command;
nctrl.ncmd.s.param1 = rx_cmd;
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
nctrl.wait_time = 100;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
if (ret < 0) {
dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
ret);
}
return ret;
}
/** Sending command to add/delete VxLAN UDP port to firmware
* @param netdev pointer to network device
* @param command OCTNET_CMD_VXLAN_PORT_CONFIG
* @param vxlan_port VxLAN port to be added or deleted
* @param vxlan_cmd_bit OCTNET_CMD_VXLAN_PORT_ADD,
* OCTNET_CMD_VXLAN_PORT_DEL
* @returns SUCCESS or FAILURE
*/
static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
u16 vxlan_port, u8 vxlan_cmd_bit)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octnic_ctrl_pkt nctrl;
int ret = 0;
memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
nctrl.ncmd.u64 = 0;
nctrl.ncmd.s.cmd = command;
nctrl.ncmd.s.more = vxlan_cmd_bit;
nctrl.ncmd.s.param1 = vxlan_port;
nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
nctrl.wait_time = 100;
nctrl.netpndev = (u64)netdev;
nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
if (ret < 0) {
dev_err(&oct->pci_dev->dev,
"DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
ret);
}
return ret;
}
/** \brief Net device fix features
* @param netdev pointer to network device
* @param request features requested
* @returns updated features list
*/
static netdev_features_t liquidio_fix_features(struct net_device *netdev,
netdev_features_t request)
{
struct lio *lio = netdev_priv(netdev);
if ((request & NETIF_F_RXCSUM) &&
!(lio->dev_capability & NETIF_F_RXCSUM))
request &= ~NETIF_F_RXCSUM;
if ((request & NETIF_F_HW_CSUM) &&
!(lio->dev_capability & NETIF_F_HW_CSUM))
request &= ~NETIF_F_HW_CSUM;
if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
request &= ~NETIF_F_TSO;
if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
request &= ~NETIF_F_TSO6;
if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
request &= ~NETIF_F_LRO;
/* Disable LRO if RXCSUM is off */
if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
(lio->dev_capability & NETIF_F_LRO))
request &= ~NETIF_F_LRO;
return request;
}
/** \brief Net device set features
* @param netdev pointer to network device
* @param features features to enable/disable
*/
static int liquidio_set_features(struct net_device *netdev,
netdev_features_t features)
{
struct lio *lio = netdev_priv(netdev);
if (!((netdev->features ^ features) & NETIF_F_LRO))
return 0;
if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
else if (!(features & NETIF_F_LRO) &&
(lio->dev_capability & NETIF_F_LRO))
liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
if (!(netdev->features & NETIF_F_RXCSUM) &&
(lio->enc_dev_capability & NETIF_F_RXCSUM) &&
(features & NETIF_F_RXCSUM))
liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
OCTNET_CMD_RXCSUM_ENABLE);
else if ((netdev->features & NETIF_F_RXCSUM) &&
(lio->enc_dev_capability & NETIF_F_RXCSUM) &&
!(features & NETIF_F_RXCSUM))
liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
OCTNET_CMD_RXCSUM_DISABLE);
return 0;
}
static void liquidio_add_vxlan_port(struct net_device *netdev,
struct udp_tunnel_info *ti)
{
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
return;
liquidio_vxlan_port_command(netdev,
OCTNET_CMD_VXLAN_PORT_CONFIG,
htons(ti->port),
OCTNET_CMD_VXLAN_PORT_ADD);
}
static void liquidio_del_vxlan_port(struct net_device *netdev,
struct udp_tunnel_info *ti)
{
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
return;
liquidio_vxlan_port_command(netdev,
OCTNET_CMD_VXLAN_PORT_CONFIG,
htons(ti->port),
OCTNET_CMD_VXLAN_PORT_DEL);
}
static const struct net_device_ops lionetdevops = {
.ndo_open = liquidio_open,
.ndo_stop = liquidio_stop,
.ndo_start_xmit = liquidio_xmit,
.ndo_get_stats = liquidio_get_stats,
.ndo_set_mac_address = liquidio_set_mac,
.ndo_set_rx_mode = liquidio_set_mcast_list,
.ndo_tx_timeout = liquidio_tx_timeout,
.ndo_vlan_rx_add_vid = liquidio_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = liquidio_vlan_rx_kill_vid,
.ndo_change_mtu = liquidio_change_mtu,
.ndo_do_ioctl = liquidio_ioctl,
.ndo_fix_features = liquidio_fix_features,
.ndo_set_features = liquidio_set_features,
.ndo_udp_tunnel_add = liquidio_add_vxlan_port,
.ndo_udp_tunnel_del = liquidio_del_vxlan_port,
};
static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
{
struct octeon_device *oct = (struct octeon_device *)buf;
struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
union oct_link_status *ls;
int gmxport = 0;
int i;
if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
recv_pkt->buffer_size[0],
recv_pkt->rh.r_nic_info.gmxport);
goto nic_info_err;
}
gmxport = recv_pkt->rh.r_nic_info.gmxport;
ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
OCT_DROQ_INFO_SIZE);
octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
for (i = 0; i < oct->ifcount; i++) {
if (oct->props[i].gmxport == gmxport) {
update_link_status(oct->props[i].netdev, ls);
break;
}
}
nic_info_err:
for (i = 0; i < recv_pkt->buffer_count; i++)
recv_buffer_free(recv_pkt->buffer_ptr[i]);
octeon_free_recv_info(recv_info);
return 0;
}
/**
* \brief Setup network interfaces
* @param octeon_dev octeon device
*
* Called during init time for each device. It assumes the NIC
* is already up and running. The link information for each
* interface is passed in link_info.
*/
static int setup_nic_devices(struct octeon_device *octeon_dev)
{
int retval, num_iqueues, num_oqueues;
struct liquidio_if_cfg_context *ctx;
u32 resp_size, ctx_size, data_size;
struct liquidio_if_cfg_resp *resp;
struct octeon_soft_command *sc;
union oct_nic_if_cfg if_cfg;
struct octdev_props *props;
struct net_device *netdev;
struct lio_version *vdata;
struct lio *lio = NULL;
u8 mac[ETH_ALEN], i, j;
u32 ifidx_or_pfnum;
ifidx_or_pfnum = octeon_dev->pf_num;
/* This is to handle link status changes */
octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
lio_nic_info, octeon_dev);
/* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
* They are handled directly.
*/
octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
free_netbuf);
octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
free_netsgbuf);
octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
free_netsgbuf_with_resp);
for (i = 0; i < octeon_dev->ifcount; i++) {
resp_size = sizeof(struct liquidio_if_cfg_resp);
ctx_size = sizeof(struct liquidio_if_cfg_context);
data_size = sizeof(struct lio_version);
sc = (struct octeon_soft_command *)
octeon_alloc_soft_command(octeon_dev, data_size,
resp_size, ctx_size);
resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
ctx = (struct liquidio_if_cfg_context *)sc->ctxptr;
vdata = (struct lio_version *)sc->virtdptr;
*((u64 *)vdata) = 0;
vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
WRITE_ONCE(ctx->cond, 0);
ctx->octeon_id = lio_get_device_id(octeon_dev);
init_waitqueue_head(&ctx->wc);
if_cfg.u64 = 0;
if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
if_cfg.s.base_queue = 0;
sc->iq_no = 0;
octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
0);
sc->callback = if_cfg_callback;
sc->callback_arg = sc;
sc->wait_time = 5000;
retval = octeon_send_soft_command(octeon_dev, sc);
if (retval == IQ_SEND_FAILED) {
dev_err(&octeon_dev->pci_dev->dev,
"iq/oq config failed status: %x\n", retval);
/* Soft instr is freed by driver in case of failure. */
goto setup_nic_dev_fail;
}
/* Sleep on a wait queue till the cond flag indicates that the
* response arrived or timed-out.
*/
if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR) {
dev_err(&octeon_dev->pci_dev->dev, "Wait interrupted\n");
goto setup_nic_wait_intr;
}
retval = resp->status;
if (retval) {
dev_err(&octeon_dev->pci_dev->dev, "iq/oq config failed\n");
goto setup_nic_dev_fail;
}
octeon_swap_8B_data((u64 *)(&resp->cfg_info),
(sizeof(struct liquidio_if_cfg_info)) >> 3);
num_iqueues = hweight64(resp->cfg_info.iqmask);
num_oqueues = hweight64(resp->cfg_info.oqmask);
if (!(num_iqueues) || !(num_oqueues)) {
dev_err(&octeon_dev->pci_dev->dev,
"Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
resp->cfg_info.iqmask, resp->cfg_info.oqmask);
goto setup_nic_dev_fail;
}
dev_dbg(&octeon_dev->pci_dev->dev,
"interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
num_iqueues, num_oqueues);
netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
if (!netdev) {
dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
goto setup_nic_dev_fail;
}
SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
/* Associate the routines that will handle different
* netdev tasks.
*/
netdev->netdev_ops = &lionetdevops;
lio = GET_LIO(netdev);
memset(lio, 0, sizeof(struct lio));
lio->ifidx = ifidx_or_pfnum;
props = &octeon_dev->props[i];
props->gmxport = resp->cfg_info.linfo.gmxport;
props->netdev = netdev;
lio->linfo.num_rxpciq = num_oqueues;
lio->linfo.num_txpciq = num_iqueues;
for (j = 0; j < num_oqueues; j++) {
lio->linfo.rxpciq[j].u64 =
resp->cfg_info.linfo.rxpciq[j].u64;
}
for (j = 0; j < num_iqueues; j++) {
lio->linfo.txpciq[j].u64 =
resp->cfg_info.linfo.txpciq[j].u64;
}
lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
lio->linfo.macaddr_is_admin_asgnd =
resp->cfg_info.linfo.macaddr_is_admin_asgnd;
lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
lio->dev_capability = NETIF_F_HIGHDMA
| NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
| NETIF_F_SG | NETIF_F_RXCSUM
| NETIF_F_TSO | NETIF_F_TSO6
| NETIF_F_GRO
| NETIF_F_LRO;
netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
/* Copy of transmit encapsulation capabilities:
* TSO, TSO6, Checksums for this device
*/
lio->enc_dev_capability = NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
| NETIF_F_GSO_UDP_TUNNEL
| NETIF_F_HW_CSUM | NETIF_F_SG
| NETIF_F_RXCSUM
| NETIF_F_TSO | NETIF_F_TSO6
| NETIF_F_LRO;
netdev->hw_enc_features =
(lio->enc_dev_capability & ~NETIF_F_LRO);
netdev->vlan_features = lio->dev_capability;
/* Add any unchangeable hw features */
lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_TX;
netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
netdev->hw_features = lio->dev_capability;
/* MTU range: 68 - 16000 */
netdev->min_mtu = LIO_MIN_MTU_SIZE;
netdev->max_mtu = LIO_MAX_MTU_SIZE;
/* Point to the properties for octeon device to which this
* interface belongs.
*/
lio->oct_dev = octeon_dev;
lio->octprops = props;
lio->netdev = netdev;
dev_dbg(&octeon_dev->pci_dev->dev,
"if%d gmx: %d hw_addr: 0x%llx\n", i,
lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
/* 64-bit swap required on LE machines */
octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
for (j = 0; j < ETH_ALEN; j++)
mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
/* Copy MAC Address to OS network device structure */
ether_addr_copy(netdev->dev_addr, mac);
if (liquidio_setup_io_queues(octeon_dev, i,
lio->linfo.num_txpciq,
lio->linfo.num_rxpciq)) {
dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
goto setup_nic_dev_fail;
}
ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
/* For VFs, enable Octeon device interrupts here,
* as this is contingent upon IO queue setup
*/
octeon_dev->fn_list.enable_interrupt(octeon_dev,
OCTEON_ALL_INTR);
/* By default all interfaces on a single Octeon uses the same
* tx and rx queues
*/
lio->txq = lio->linfo.txpciq[0].s.q_no;
lio->rxq = lio->linfo.rxpciq[0].s.q_no;
lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
if (setup_glists(lio, num_iqueues)) {
dev_err(&octeon_dev->pci_dev->dev,
"Gather list allocation failed\n");
goto setup_nic_dev_fail;
}
/* Register ethtool support */
liquidio_set_ethtool_ops(netdev);
if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
else
octeon_dev->priv_flags = 0x0;
if (netdev->features & NETIF_F_LRO)
liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
if (setup_link_status_change_wq(netdev))
goto setup_nic_dev_fail;
if (setup_rx_oom_poll_fn(netdev))
goto setup_nic_dev_fail;
/* Register the network device with the OS */
if (register_netdev(netdev)) {
dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
goto setup_nic_dev_fail;
}
dev_dbg(&octeon_dev->pci_dev->dev,
"Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
netif_carrier_off(netdev);
lio->link_changes++;
ifstate_set(lio, LIO_IFSTATE_REGISTERED);
/* Sending command to firmware to enable Rx checksum offload
* by default at the time of setup of Liquidio driver for
* this device
*/
liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
OCTNET_CMD_RXCSUM_ENABLE);
liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
OCTNET_CMD_TXCSUM_ENABLE);
dev_dbg(&octeon_dev->pci_dev->dev,
"NIC ifidx:%d Setup successful\n", i);
octeon_free_soft_command(octeon_dev, sc);
}
return 0;
setup_nic_dev_fail:
octeon_free_soft_command(octeon_dev, sc);
setup_nic_wait_intr:
while (i--) {
dev_err(&octeon_dev->pci_dev->dev,
"NIC ifidx:%d Setup failed\n", i);
liquidio_destroy_nic_device(octeon_dev, i);
}
return -ENODEV;
}
/**
* \brief initialize the NIC
* @param oct octeon device
*
* This initialization routine is called once the Octeon device application is
* up and running
*/
static int liquidio_init_nic_module(struct octeon_device *oct)
{
int num_nic_ports = 1;
int i, retval = 0;
dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
/* only default iq and oq were initialized
* initialize the rest as well run port_config command for each port
*/
oct->ifcount = num_nic_ports;
memset(oct->props, 0,
sizeof(struct octdev_props) * num_nic_ports);
for (i = 0; i < MAX_OCTEON_LINKS; i++)
oct->props[i].gmxport = -1;
retval = setup_nic_devices(oct);
if (retval) {
dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
goto octnet_init_failure;
}
dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
return retval;
octnet_init_failure:
oct->ifcount = 0;
return retval;
}
/**
* \brief Device initialization for each Octeon device that is probed
* @param octeon_dev octeon device
*/
static int octeon_device_init(struct octeon_device *oct)
{
u32 rev_id;
int j;
atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
/* Enable access to the octeon device and make its DMA capability
* known to the OS.
*/
if (octeon_pci_os_setup(oct))
return 1;
atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
oct->chip_id = OCTEON_CN23XX_VF_VID;
pci_read_config_dword(oct->pci_dev, 8, &rev_id);
oct->rev_id = rev_id & 0xff;
if (cn23xx_setup_octeon_vf_device(oct))
return 1;
atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
oct->app_mode = CVM_DRV_NIC_APP;
/* Initialize the dispatch mechanism used to push packets arriving on
* Octeon Output queues.
*/
if (octeon_init_dispatch_list(oct))
return 1;
atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
if (octeon_set_io_queues_off(oct)) {
dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
return 1;
}
if (oct->fn_list.setup_device_regs(oct)) {
dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
return 1;
}
/* Initialize soft command buffer pool */
if (octeon_setup_sc_buffer_pool(oct)) {
dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
return 1;
}
atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
/* Setup the data structures that manage this Octeon's Input queues. */
if (octeon_setup_instr_queues(oct)) {
dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
return 1;
}
atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
/* Initialize lists to manage the requests of different types that
* arrive from user & kernel applications for this octeon device.
*/
if (octeon_setup_response_list(oct)) {
dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
return 1;
}
atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
if (octeon_setup_output_queues(oct)) {
dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
return 1;
}
atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
if (oct->fn_list.setup_mbox(oct)) {
dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
return 1;
}
atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
if (octeon_allocate_ioq_vector(oct)) {
dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
return 1;
}
atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF Version: %s, %d ioqs\n",
LIQUIDIO_VERSION, oct->sriov_info.rings_per_vf);
/* Setup the interrupt handler and record the INT SUM register address*/
if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
return 1;
atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
/* ***************************************************************
* The interrupts need to be enabled for the PF<-->VF handshake.
* They are [re]-enabled after the PF<-->VF handshake so that the
* correct OQ tick value is used (i.e. the value retrieved from
* the PF as part of the handshake).
*/
/* Enable Octeon device interrupts */
oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
if (cn23xx_octeon_pfvf_handshake(oct))
return 1;
/* Here we [re]-enable the interrupts so that the correct OQ tick value
* is used (i.e. the value that was retrieved during the handshake)
*/
/* Enable Octeon device interrupts */
oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
/* *************************************************************** */
/* Enable the input and output queues for this Octeon device */
if (oct->fn_list.enable_io_queues(oct)) {
dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
return 1;
}
atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
atomic_set(&oct->status, OCT_DEV_HOST_OK);
/* Send Credit for Octeon Output queues. Credits are always sent after
* the output queue is enabled.
*/
for (j = 0; j < oct->num_oqs; j++)
writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
/* Packets can start arriving on the output queues from this point. */
atomic_set(&oct->status, OCT_DEV_CORE_OK);
atomic_set(&oct->status, OCT_DEV_RUNNING);
if (liquidio_init_nic_module(oct))
return 1;
return 0;
}
static int __init liquidio_vf_init(void)
{
octeon_init_device_list(0);
return pci_register_driver(&liquidio_vf_pci_driver);
}
static void __exit liquidio_vf_exit(void)
{
pci_unregister_driver(&liquidio_vf_pci_driver);
pr_info("LiquidIO_VF network module is now unloaded\n");
}
module_init(liquidio_vf_init);
module_exit(liquidio_vf_exit);
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