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kernel_samsung_a34x-permissive/drivers/infiniband/hw/nes/nes.c

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Import A346BXXU1AWB9 kernel source Android 13
2024-04-28 06:49:01 -07:00
/*
* Copyright (c) 2006 - 2011 Intel Corporation. All rights reserved.
* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/if_vlan.h>
#include <linux/crc32.h>
#include <linux/in.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/if_arp.h>
#include <linux/highmem.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_pack.h>
#include <rdma/iw_cm.h>
#include "nes.h"
#include <net/netevent.h>
#include <net/neighbour.h>
#include <linux/route.h>
#include <net/ip_fib.h>
MODULE_AUTHOR("NetEffect");
MODULE_DESCRIPTION("NetEffect RNIC Low-level iWARP Driver");
MODULE_LICENSE("Dual BSD/GPL");
int interrupt_mod_interval = 0;
/* Interoperability */
int mpa_version = 1;
module_param(mpa_version, int, 0644);
MODULE_PARM_DESC(mpa_version, "MPA version to be used int MPA Req/Resp (0 or 1)");
/* Interoperability */
int disable_mpa_crc = 0;
module_param(disable_mpa_crc, int, 0644);
MODULE_PARM_DESC(disable_mpa_crc, "Disable checking of MPA CRC");
unsigned int nes_drv_opt = NES_DRV_OPT_DISABLE_INT_MOD | NES_DRV_OPT_ENABLE_PAU;
module_param(nes_drv_opt, int, 0644);
MODULE_PARM_DESC(nes_drv_opt, "Driver option parameters");
unsigned int nes_debug_level = 0;
module_param_named(debug_level, nes_debug_level, uint, 0644);
MODULE_PARM_DESC(debug_level, "Enable debug output level");
unsigned int wqm_quanta = 0x10000;
module_param(wqm_quanta, int, 0644);
MODULE_PARM_DESC(wqm_quanta, "WQM quanta");
static bool limit_maxrdreqsz;
module_param(limit_maxrdreqsz, bool, 0644);
MODULE_PARM_DESC(limit_maxrdreqsz, "Limit max read request size to 256 Bytes");
LIST_HEAD(nes_adapter_list);
static LIST_HEAD(nes_dev_list);
atomic_t qps_destroyed;
static unsigned int ee_flsh_adapter;
static unsigned int sysfs_nonidx_addr;
static unsigned int sysfs_idx_addr;
static const struct pci_device_id nes_pci_table[] = {
{ PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020), },
{ PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020_KR), },
{0}
};
MODULE_DEVICE_TABLE(pci, nes_pci_table);
static int nes_inetaddr_event(struct notifier_block *, unsigned long, void *);
static int nes_net_event(struct notifier_block *, unsigned long, void *);
static int nes_notifiers_registered;
static struct notifier_block nes_inetaddr_notifier = {
.notifier_call = nes_inetaddr_event
};
static struct notifier_block nes_net_notifier = {
.notifier_call = nes_net_event
};
/**
* nes_inetaddr_event
*/
static int nes_inetaddr_event(struct notifier_block *notifier,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = ptr;
struct net_device *event_netdev = ifa->ifa_dev->dev;
struct nes_device *nesdev;
struct net_device *netdev;
struct net_device *upper_dev;
struct nes_vnic *nesvnic;
unsigned int is_bonded;
nes_debug(NES_DBG_NETDEV, "nes_inetaddr_event: ip address %pI4, netmask %pI4.\n",
&ifa->ifa_address, &ifa->ifa_mask);
list_for_each_entry(nesdev, &nes_dev_list, list) {
nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p. (%s)\n",
nesdev, nesdev->netdev[0]->name);
netdev = nesdev->netdev[0];
nesvnic = netdev_priv(netdev);
upper_dev = netdev_master_upper_dev_get(netdev);
is_bonded = netif_is_bond_slave(netdev) &&
(upper_dev == event_netdev);
if ((netdev == event_netdev) || is_bonded) {
if (nesvnic->rdma_enabled == 0) {
nes_debug(NES_DBG_NETDEV, "Returning without processing event for %s since"
" RDMA is not enabled.\n",
netdev->name);
return NOTIFY_OK;
}
/* we have ifa->ifa_address/mask here if we need it */
switch (event) {
case NETDEV_DOWN:
nes_debug(NES_DBG_NETDEV, "event:DOWN\n");
nes_write_indexed(nesdev,
NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)), 0);
nes_manage_arp_cache(netdev, netdev->dev_addr,
ntohl(nesvnic->local_ipaddr), NES_ARP_DELETE);
nesvnic->local_ipaddr = 0;
if (is_bonded)
continue;
else
return NOTIFY_OK;
break;
case NETDEV_UP:
nes_debug(NES_DBG_NETDEV, "event:UP\n");
if (nesvnic->local_ipaddr != 0) {
nes_debug(NES_DBG_NETDEV, "Interface already has local_ipaddr\n");
return NOTIFY_OK;
}
/* fall through */
case NETDEV_CHANGEADDR:
/* Add the address to the IP table */
if (upper_dev) {
struct in_device *in;
rcu_read_lock();
in = __in_dev_get_rcu(upper_dev);
nesvnic->local_ipaddr = in->ifa_list->ifa_address;
rcu_read_unlock();
} else {
nesvnic->local_ipaddr = ifa->ifa_address;
}
nes_write_indexed(nesdev,
NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)),
ntohl(nesvnic->local_ipaddr));
nes_manage_arp_cache(netdev, netdev->dev_addr,
ntohl(nesvnic->local_ipaddr), NES_ARP_ADD);
if (is_bonded)
continue;
else
return NOTIFY_OK;
break;
default:
break;
}
}
}
return NOTIFY_DONE;
}
/**
* nes_net_event
*/
static int nes_net_event(struct notifier_block *notifier,
unsigned long event, void *ptr)
{
struct neighbour *neigh = ptr;
struct nes_device *nesdev;
struct net_device *netdev;
struct nes_vnic *nesvnic;
switch (event) {
case NETEVENT_NEIGH_UPDATE:
list_for_each_entry(nesdev, &nes_dev_list, list) {
/* nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p.\n", nesdev); */
netdev = nesdev->netdev[0];
nesvnic = netdev_priv(netdev);
if (netdev == neigh->dev) {
if (nesvnic->rdma_enabled == 0) {
nes_debug(NES_DBG_NETDEV, "Skipping device %s since no RDMA\n",
netdev->name);
} else {
if (neigh->nud_state & NUD_VALID) {
nes_manage_arp_cache(neigh->dev, neigh->ha,
ntohl(*(__be32 *)neigh->primary_key), NES_ARP_ADD);
} else {
nes_manage_arp_cache(neigh->dev, neigh->ha,
ntohl(*(__be32 *)neigh->primary_key), NES_ARP_DELETE);
}
}
return NOTIFY_OK;
}
}
break;
default:
nes_debug(NES_DBG_NETDEV, "NETEVENT_ %lu undefined\n", event);
break;
}
return NOTIFY_DONE;
}
/**
* nes_add_ref
*/
void nes_add_ref(struct ib_qp *ibqp)
{
struct nes_qp *nesqp;
nesqp = to_nesqp(ibqp);
nes_debug(NES_DBG_QP, "Bumping refcount for QP%u. Pre-inc value = %u\n",
ibqp->qp_num, atomic_read(&nesqp->refcount));
atomic_inc(&nesqp->refcount);
}
static void nes_cqp_rem_ref_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
{
unsigned long flags;
struct nes_qp *nesqp = cqp_request->cqp_callback_pointer;
struct nes_adapter *nesadapter = nesdev->nesadapter;
atomic_inc(&qps_destroyed);
/* Free the control structures */
if (nesqp->pbl_vbase) {
pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
nesadapter->free_256pbl++;
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
nesqp->pbl_vbase = NULL;
} else {
pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
}
nes_free_resource(nesadapter, nesadapter->allocated_qps, nesqp->hwqp.qp_id);
nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
kfree(nesqp->allocated_buffer);
}
/**
* nes_rem_ref
*/
void nes_rem_ref(struct ib_qp *ibqp)
{
u64 u64temp;
struct nes_qp *nesqp;
struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
u32 opcode;
nesqp = to_nesqp(ibqp);
if (atomic_read(&nesqp->refcount) == 0) {
printk(KERN_INFO PFX "%s: Reference count already 0 for QP%d, last aeq = 0x%04X.\n",
__func__, ibqp->qp_num, nesqp->last_aeq);
BUG();
}
if (atomic_dec_and_test(&nesqp->refcount)) {
if (nesqp->pau_mode)
nes_destroy_pau_qp(nesdev, nesqp);
/* Destroy the QP */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_QP, "Failed to get a cqp_request.\n");
return;
}
cqp_request->waiting = 0;
cqp_request->callback = 1;
cqp_request->cqp_callback = nes_cqp_rem_ref_callback;
cqp_request->cqp_callback_pointer = nesqp;
cqp_wqe = &cqp_request->cqp_wqe;
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
opcode = NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_IWARP;
if (nesqp->hte_added) {
opcode |= NES_CQP_QP_DEL_HTE;
nesqp->hte_added = 0;
}
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
u64temp = (u64)nesqp->nesqp_context_pbase;
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
nes_post_cqp_request(nesdev, cqp_request);
}
}
/**
* nes_get_qp
*/
struct ib_qp *nes_get_qp(struct ib_device *device, int qpn)
{
struct nes_vnic *nesvnic = to_nesvnic(device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
if ((qpn < NES_FIRST_QPN) || (qpn >= (NES_FIRST_QPN + nesadapter->max_qp)))
return NULL;
return &nesadapter->qp_table[qpn - NES_FIRST_QPN]->ibqp;
}
/**
* nes_print_macaddr
*/
static void nes_print_macaddr(struct net_device *netdev)
{
nes_debug(NES_DBG_INIT, "%s: %pM, IRQ %u\n",
netdev->name, netdev->dev_addr, netdev->irq);
}
/**
* nes_interrupt - handle interrupts
*/
static irqreturn_t nes_interrupt(int irq, void *dev_id)
{
struct nes_device *nesdev = (struct nes_device *)dev_id;
int handled = 0;
u32 int_mask;
u32 int_req;
u32 int_stat;
u32 intf_int_stat;
u32 timer_stat;
if (nesdev->msi_enabled) {
/* No need to read the interrupt pending register if msi is enabled */
handled = 1;
} else {
if (unlikely(nesdev->nesadapter->hw_rev == NE020_REV)) {
/* Master interrupt enable provides synchronization for kicking off bottom half
when interrupt sharing is going on */
int_mask = nes_read32(nesdev->regs + NES_INT_MASK);
if (int_mask & 0x80000000) {
/* Check interrupt status to see if this might be ours */
int_stat = nes_read32(nesdev->regs + NES_INT_STAT);
int_req = nesdev->int_req;
if (int_stat&int_req) {
/* if interesting CEQ or AEQ is pending, claim the interrupt */
if ((int_stat&int_req) & (~(NES_INT_TIMER|NES_INT_INTF))) {
handled = 1;
} else {
if (((int_stat & int_req) & NES_INT_TIMER) == NES_INT_TIMER) {
/* Timer might be running but might be for another function */
timer_stat = nes_read32(nesdev->regs + NES_TIMER_STAT);
if ((timer_stat & nesdev->timer_int_req) != 0) {
handled = 1;
}
}
if ((((int_stat & int_req) & NES_INT_INTF) == NES_INT_INTF) &&
(handled == 0)) {
intf_int_stat = nes_read32(nesdev->regs+NES_INTF_INT_STAT);
if ((intf_int_stat & nesdev->intf_int_req) != 0) {
handled = 1;
}
}
}
if (handled) {
nes_write32(nesdev->regs+NES_INT_MASK, int_mask & (~0x80000000));
int_mask = nes_read32(nesdev->regs+NES_INT_MASK);
/* Save off the status to save an additional read */
nesdev->int_stat = int_stat;
nesdev->napi_isr_ran = 1;
}
}
}
} else {
handled = nes_read32(nesdev->regs+NES_INT_PENDING);
}
}
if (handled) {
if (nes_napi_isr(nesdev) == 0) {
tasklet_schedule(&nesdev->dpc_tasklet);
}
return IRQ_HANDLED;
} else {
return IRQ_NONE;
}
}
/**
* nes_probe - Device initialization
*/
static int nes_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
{
struct net_device *netdev = NULL;
struct nes_device *nesdev = NULL;
int ret = 0;
void __iomem *mmio_regs = NULL;
u8 hw_rev;
assert(pcidev != NULL);
assert(ent != NULL);
printk(KERN_INFO PFX "NetEffect RNIC driver v%s loading. (%s)\n",
DRV_VERSION, pci_name(pcidev));
ret = pci_enable_device(pcidev);
if (ret) {
printk(KERN_ERR PFX "Unable to enable PCI device. (%s)\n", pci_name(pcidev));
goto bail0;
}
nes_debug(NES_DBG_INIT, "BAR0 (@0x%08lX) size = 0x%lX bytes\n",
(long unsigned int)pci_resource_start(pcidev, BAR_0),
(long unsigned int)pci_resource_len(pcidev, BAR_0));
nes_debug(NES_DBG_INIT, "BAR1 (@0x%08lX) size = 0x%lX bytes\n",
(long unsigned int)pci_resource_start(pcidev, BAR_1),
(long unsigned int)pci_resource_len(pcidev, BAR_1));
/* Make sure PCI base addr are MMIO */
if (!(pci_resource_flags(pcidev, BAR_0) & IORESOURCE_MEM) ||
!(pci_resource_flags(pcidev, BAR_1) & IORESOURCE_MEM)) {
printk(KERN_ERR PFX "PCI regions not an MMIO resource\n");
ret = -ENODEV;
goto bail1;
}
/* Reserve PCI I/O and memory resources */
ret = pci_request_regions(pcidev, DRV_NAME);
if (ret) {
printk(KERN_ERR PFX "Unable to request regions. (%s)\n", pci_name(pcidev));
goto bail1;
}
if ((sizeof(dma_addr_t) > 4)) {
ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(64));
if (ret < 0) {
printk(KERN_ERR PFX "64b DMA mask configuration failed\n");
goto bail2;
}
ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(64));
if (ret) {
printk(KERN_ERR PFX "64b DMA consistent mask configuration failed\n");
goto bail2;
}
} else {
ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
if (ret < 0) {
printk(KERN_ERR PFX "32b DMA mask configuration failed\n");
goto bail2;
}
ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(32));
if (ret) {
printk(KERN_ERR PFX "32b DMA consistent mask configuration failed\n");
goto bail2;
}
}
pci_set_master(pcidev);
/* Allocate hardware structure */
nesdev = kzalloc(sizeof(struct nes_device), GFP_KERNEL);
if (!nesdev) {
ret = -ENOMEM;
goto bail2;
}
nes_debug(NES_DBG_INIT, "Allocated nes device at %p\n", nesdev);
nesdev->pcidev = pcidev;
pci_set_drvdata(pcidev, nesdev);
pci_read_config_byte(pcidev, 0x0008, &hw_rev);
nes_debug(NES_DBG_INIT, "hw_rev=%u\n", hw_rev);
spin_lock_init(&nesdev->indexed_regs_lock);
/* Remap the PCI registers in adapter BAR0 to kernel VA space */
mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0),
pci_resource_len(pcidev, BAR_0));
if (mmio_regs == NULL) {
printk(KERN_ERR PFX "Unable to remap BAR0\n");
ret = -EIO;
goto bail3;
}
nesdev->regs = mmio_regs;
nesdev->index_reg = 0x50 + (PCI_FUNC(pcidev->devfn)*8) + mmio_regs;
/* Ensure interrupts are disabled */
nes_write32(nesdev->regs+NES_INT_MASK, 0x7fffffff);
if (nes_drv_opt & NES_DRV_OPT_ENABLE_MSI) {
if (!pci_enable_msi(nesdev->pcidev)) {
nesdev->msi_enabled = 1;
nes_debug(NES_DBG_INIT, "MSI is enabled for device %s\n",
pci_name(pcidev));
} else {
nes_debug(NES_DBG_INIT, "MSI is disabled by linux for device %s\n",
pci_name(pcidev));
}
} else {
nes_debug(NES_DBG_INIT, "MSI not requested due to driver options for device %s\n",
pci_name(pcidev));
}
nesdev->csr_start = pci_resource_start(nesdev->pcidev, BAR_0);
nesdev->doorbell_region = pci_resource_start(nesdev->pcidev, BAR_1);
/* Init the adapter */
nesdev->nesadapter = nes_init_adapter(nesdev, hw_rev);
if (!nesdev->nesadapter) {
printk(KERN_ERR PFX "Unable to initialize adapter.\n");
ret = -ENOMEM;
goto bail5;
}
nesdev->nesadapter->et_rx_coalesce_usecs_irq = interrupt_mod_interval;
nesdev->nesadapter->wqm_quanta = wqm_quanta;
/* nesdev->base_doorbell_index =
nesdev->nesadapter->pd_config_base[PCI_FUNC(nesdev->pcidev->devfn)]; */
nesdev->base_doorbell_index = 1;
nesdev->doorbell_start = nesdev->nesadapter->doorbell_start;
if (nesdev->nesadapter->phy_type[0] == NES_PHY_TYPE_PUMA_1G) {
switch (PCI_FUNC(nesdev->pcidev->devfn) %
nesdev->nesadapter->port_count) {
case 1:
nesdev->mac_index = 2;
break;
case 2:
nesdev->mac_index = 1;
break;
case 3:
nesdev->mac_index = 3;
break;
case 0:
default:
nesdev->mac_index = 0;
}
} else {
nesdev->mac_index = PCI_FUNC(nesdev->pcidev->devfn) %
nesdev->nesadapter->port_count;
}
if ((limit_maxrdreqsz ||
((nesdev->nesadapter->phy_type[0] == NES_PHY_TYPE_GLADIUS) &&
(hw_rev == NE020_REV1))) &&
(pcie_get_readrq(pcidev) > 256)) {
if (pcie_set_readrq(pcidev, 256))
printk(KERN_ERR PFX "Unable to set max read request"
" to 256 bytes\n");
else
nes_debug(NES_DBG_INIT, "Max read request size set"
" to 256 bytes\n");
}
tasklet_init(&nesdev->dpc_tasklet, nes_dpc, (unsigned long)nesdev);
/* bring up the Control QP */
if (nes_init_cqp(nesdev)) {
ret = -ENODEV;
goto bail6;
}
/* Arm the CCQ */
nes_write32(nesdev->regs+NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
PCI_FUNC(nesdev->pcidev->devfn));
nes_read32(nesdev->regs+NES_CQE_ALLOC);
/* Enable the interrupts */
nesdev->int_req = (0x101 << PCI_FUNC(nesdev->pcidev->devfn)) |
(1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
if (PCI_FUNC(nesdev->pcidev->devfn) < 4) {
nesdev->int_req |= (1 << (PCI_FUNC(nesdev->mac_index)+24));
}
/* TODO: This really should be the first driver to load, not function 0 */
if (PCI_FUNC(nesdev->pcidev->devfn) == 0) {
/* pick up PCI and critical errors if the first driver to load */
nesdev->intf_int_req = NES_INTF_INT_PCIERR | NES_INTF_INT_CRITERR;
nesdev->int_req |= NES_INT_INTF;
} else {
nesdev->intf_int_req = 0;
}
nesdev->intf_int_req |= (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS0, 0);
nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS1, 0);
nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS2, 0x00001265);
nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS4, 0x18021804);
nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS3, 0x17801790);
/* deal with both periodic and one_shot */
nesdev->timer_int_req = 0x101 << PCI_FUNC(nesdev->pcidev->devfn);
nesdev->nesadapter->timer_int_req |= nesdev->timer_int_req;
nes_debug(NES_DBG_INIT, "setting int_req for function %u, nesdev = 0x%04X, adapter = 0x%04X\n",
PCI_FUNC(nesdev->pcidev->devfn),
nesdev->timer_int_req, nesdev->nesadapter->timer_int_req);
nes_write32(nesdev->regs+NES_INTF_INT_MASK, ~(nesdev->intf_int_req));
list_add_tail(&nesdev->list, &nes_dev_list);
/* Request an interrupt line for the driver */
ret = request_irq(pcidev->irq, nes_interrupt, IRQF_SHARED, DRV_NAME, nesdev);
if (ret) {
printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n",
pci_name(pcidev), pcidev->irq);
goto bail65;
}
nes_write32(nesdev->regs+NES_INT_MASK, ~nesdev->int_req);
if (nes_notifiers_registered == 0) {
register_inetaddr_notifier(&nes_inetaddr_notifier);
register_netevent_notifier(&nes_net_notifier);
}
nes_notifiers_registered++;
INIT_DELAYED_WORK(&nesdev->work, nes_recheck_link_status);
/* Initialize network devices */
netdev = nes_netdev_init(nesdev, mmio_regs);
if (netdev == NULL) {
ret = -ENOMEM;
goto bail7;
}
/* Register network device */
ret = register_netdev(netdev);
if (ret) {
printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", ret);
nes_netdev_destroy(netdev);
goto bail7;
}
nes_print_macaddr(netdev);
nesdev->netdev_count++;
nesdev->nesadapter->netdev_count++;
printk(KERN_INFO PFX "%s: NetEffect RNIC driver successfully loaded.\n",
pci_name(pcidev));
return 0;
bail7:
printk(KERN_ERR PFX "bail7\n");
while (nesdev->netdev_count > 0) {
nesdev->netdev_count--;
nesdev->nesadapter->netdev_count--;
unregister_netdev(nesdev->netdev[nesdev->netdev_count]);
nes_netdev_destroy(nesdev->netdev[nesdev->netdev_count]);
}
nes_debug(NES_DBG_INIT, "netdev_count=%d, nesadapter->netdev_count=%d\n",
nesdev->netdev_count, nesdev->nesadapter->netdev_count);
nes_notifiers_registered--;
if (nes_notifiers_registered == 0) {
unregister_netevent_notifier(&nes_net_notifier);
unregister_inetaddr_notifier(&nes_inetaddr_notifier);
}
list_del(&nesdev->list);
nes_destroy_cqp(nesdev);
bail65:
printk(KERN_ERR PFX "bail65\n");
free_irq(pcidev->irq, nesdev);
if (nesdev->msi_enabled) {
pci_disable_msi(pcidev);
}
bail6:
printk(KERN_ERR PFX "bail6\n");
tasklet_kill(&nesdev->dpc_tasklet);
/* Deallocate the Adapter Structure */
nes_destroy_adapter(nesdev->nesadapter);
bail5:
printk(KERN_ERR PFX "bail5\n");
iounmap(nesdev->regs);
bail3:
printk(KERN_ERR PFX "bail3\n");
kfree(nesdev);
bail2:
pci_release_regions(pcidev);
bail1:
pci_disable_device(pcidev);
bail0:
return ret;
}
/**
* nes_remove - unload from kernel
*/
static void nes_remove(struct pci_dev *pcidev)
{
struct nes_device *nesdev = pci_get_drvdata(pcidev);
struct net_device *netdev;
int netdev_index = 0;
unsigned long flags;
if (nesdev->netdev_count) {
netdev = nesdev->netdev[netdev_index];
if (netdev) {
netif_stop_queue(netdev);
unregister_netdev(netdev);
nes_netdev_destroy(netdev);
nesdev->netdev[netdev_index] = NULL;
nesdev->netdev_count--;
nesdev->nesadapter->netdev_count--;
}
}
nes_notifiers_registered--;
if (nes_notifiers_registered == 0) {
unregister_netevent_notifier(&nes_net_notifier);
unregister_inetaddr_notifier(&nes_inetaddr_notifier);
}
list_del(&nesdev->list);
nes_destroy_cqp(nesdev);
free_irq(pcidev->irq, nesdev);
tasklet_kill(&nesdev->dpc_tasklet);
spin_lock_irqsave(&nesdev->nesadapter->phy_lock, flags);
if (nesdev->link_recheck) {
spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
cancel_delayed_work_sync(&nesdev->work);
} else {
spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
}
/* Deallocate the Adapter Structure */
nes_destroy_adapter(nesdev->nesadapter);
if (nesdev->msi_enabled) {
pci_disable_msi(pcidev);
}
iounmap(nesdev->regs);
kfree(nesdev);
/* nes_debug(NES_DBG_SHUTDOWN, "calling pci_release_regions.\n"); */
pci_release_regions(pcidev);
pci_disable_device(pcidev);
pci_set_drvdata(pcidev, NULL);
}
static ssize_t adapter_show(struct device_driver *ddp, char *buf)
{
unsigned int devfn = 0xffffffff;
unsigned char bus_number = 0xff;
unsigned int i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
devfn = nesdev->pcidev->devfn;
bus_number = nesdev->pcidev->bus->number;
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "%x:%x\n", bus_number, devfn);
}
static ssize_t adapter_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
ee_flsh_adapter = simple_strtoul(p, &p, 10);
return strnlen(buf, count);
}
static ssize_t eeprom_cmd_show(struct device_driver *ddp, char *buf)
{
u32 eeprom_cmd = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
eeprom_cmd = nes_read32(nesdev->regs + NES_EEPROM_COMMAND);
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_cmd);
}
static ssize_t eeprom_cmd_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
u32 val;
u32 i = 0;
struct nes_device *nesdev;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
val = simple_strtoul(p, &p, 16);
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nes_write32(nesdev->regs + NES_EEPROM_COMMAND, val);
break;
}
i++;
}
}
return strnlen(buf, count);
}
static ssize_t eeprom_data_show(struct device_driver *ddp, char *buf)
{
u32 eeprom_data = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
eeprom_data = nes_read32(nesdev->regs + NES_EEPROM_DATA);
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_data);
}
static ssize_t eeprom_data_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
u32 val;
u32 i = 0;
struct nes_device *nesdev;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
val = simple_strtoul(p, &p, 16);
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nes_write32(nesdev->regs + NES_EEPROM_DATA, val);
break;
}
i++;
}
}
return strnlen(buf, count);
}
static ssize_t flash_cmd_show(struct device_driver *ddp, char *buf)
{
u32 flash_cmd = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
flash_cmd = nes_read32(nesdev->regs + NES_FLASH_COMMAND);
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%x\n", flash_cmd);
}
static ssize_t flash_cmd_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
u32 val;
u32 i = 0;
struct nes_device *nesdev;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
val = simple_strtoul(p, &p, 16);
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nes_write32(nesdev->regs + NES_FLASH_COMMAND, val);
break;
}
i++;
}
}
return strnlen(buf, count);
}
static ssize_t flash_data_show(struct device_driver *ddp, char *buf)
{
u32 flash_data = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
flash_data = nes_read32(nesdev->regs + NES_FLASH_DATA);
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%x\n", flash_data);
}
static ssize_t flash_data_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
u32 val;
u32 i = 0;
struct nes_device *nesdev;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
val = simple_strtoul(p, &p, 16);
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nes_write32(nesdev->regs + NES_FLASH_DATA, val);
break;
}
i++;
}
}
return strnlen(buf, count);
}
static ssize_t nonidx_addr_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_nonidx_addr);
}
static ssize_t nonidx_addr_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
sysfs_nonidx_addr = simple_strtoul(p, &p, 16);
return strnlen(buf, count);
}
static ssize_t nonidx_data_show(struct device_driver *ddp, char *buf)
{
u32 nonidx_data = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nonidx_data = nes_read32(nesdev->regs + sysfs_nonidx_addr);
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%x\n", nonidx_data);
}
static ssize_t nonidx_data_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
u32 val;
u32 i = 0;
struct nes_device *nesdev;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
val = simple_strtoul(p, &p, 16);
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nes_write32(nesdev->regs + sysfs_nonidx_addr, val);
break;
}
i++;
}
}
return strnlen(buf, count);
}
static ssize_t idx_addr_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_idx_addr);
}
static ssize_t idx_addr_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
sysfs_idx_addr = simple_strtoul(p, &p, 16);
return strnlen(buf, count);
}
static ssize_t idx_data_show(struct device_driver *ddp, char *buf)
{
u32 idx_data = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
idx_data = nes_read_indexed(nesdev, sysfs_idx_addr);
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%x\n", idx_data);
}
static ssize_t idx_data_store(struct device_driver *ddp,
const char *buf, size_t count)
{
char *p = (char *)buf;
u32 val;
u32 i = 0;
struct nes_device *nesdev;
if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
val = simple_strtoul(p, &p, 16);
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nes_write_indexed(nesdev, sysfs_idx_addr, val);
break;
}
i++;
}
}
return strnlen(buf, count);
}
static ssize_t wqm_quanta_show(struct device_driver *ddp, char *buf)
{
u32 wqm_quanta_value = 0xdead;
u32 i = 0;
struct nes_device *nesdev;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
wqm_quanta_value = nesdev->nesadapter->wqm_quanta;
break;
}
i++;
}
return snprintf(buf, PAGE_SIZE, "0x%X\n", wqm_quanta_value);
}
static ssize_t wqm_quanta_store(struct device_driver *ddp, const char *buf,
size_t count)
{
unsigned long wqm_quanta_value;
u32 wqm_config1;
u32 i = 0;
struct nes_device *nesdev;
if (kstrtoul(buf, 0, &wqm_quanta_value) < 0)
return -EINVAL;
list_for_each_entry(nesdev, &nes_dev_list, list) {
if (i == ee_flsh_adapter) {
nesdev->nesadapter->wqm_quanta = wqm_quanta_value;
wqm_config1 = nes_read_indexed(nesdev,
NES_IDX_WQM_CONFIG1);
nes_write_indexed(nesdev, NES_IDX_WQM_CONFIG1,
((wqm_quanta_value << 1) |
(wqm_config1 & 0x00000001)));
break;
}
i++;
}
return strnlen(buf, count);
}
static DRIVER_ATTR_RW(adapter);
static DRIVER_ATTR_RW(eeprom_cmd);
static DRIVER_ATTR_RW(eeprom_data);
static DRIVER_ATTR_RW(flash_cmd);
static DRIVER_ATTR_RW(flash_data);
static DRIVER_ATTR_RW(nonidx_addr);
static DRIVER_ATTR_RW(nonidx_data);
static DRIVER_ATTR_RW(idx_addr);
static DRIVER_ATTR_RW(idx_data);
static DRIVER_ATTR_RW(wqm_quanta);
static struct attribute *nes_attrs[] = {
&driver_attr_adapter.attr,
&driver_attr_eeprom_cmd.attr,
&driver_attr_eeprom_data.attr,
&driver_attr_flash_cmd.attr,
&driver_attr_flash_data.attr,
&driver_attr_nonidx_addr.attr,
&driver_attr_nonidx_data.attr,
&driver_attr_idx_addr.attr,
&driver_attr_idx_data.attr,
&driver_attr_wqm_quanta.attr,
NULL,
};
ATTRIBUTE_GROUPS(nes);
static struct pci_driver nes_pci_driver = {
.name = DRV_NAME,
.id_table = nes_pci_table,
.probe = nes_probe,
.remove = nes_remove,
.groups = nes_groups,
};
/**
* nes_init_module - module initialization entry point
*/
static int __init nes_init_module(void)
{
int retval;
retval = nes_cm_start();
if (retval) {
printk(KERN_ERR PFX "Unable to start NetEffect iWARP CM.\n");
return retval;
}
return pci_register_driver(&nes_pci_driver);
}
/**
* nes_exit_module - module unload entry point
*/
static void __exit nes_exit_module(void)
{
nes_cm_stop();
pci_unregister_driver(&nes_pci_driver);
}
module_init(nes_init_module);
module_exit(nes_exit_module);
Reference in a new issue Copy permalink