nes.c 32.7 KB
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/*
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 * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
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 * 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>
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#include <linux/slab.h>
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#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");
MODULE_VERSION(DRV_VERSION);

int interrupt_mod_interval = 0;

/* Interoperability */
int mpa_version = 1;
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module_param(mpa_version, int, 0644);
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MODULE_PARM_DESC(mpa_version, "MPA version to be used int MPA Req/Resp (0 or 1)");

/* Interoperability */
int disable_mpa_crc = 0;
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module_param(disable_mpa_crc, int, 0644);
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MODULE_PARM_DESC(disable_mpa_crc, "Disable checking of MPA CRC");

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unsigned int nes_drv_opt = NES_DRV_OPT_DISABLE_INT_MOD | NES_DRV_OPT_ENABLE_PAU;
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module_param(nes_drv_opt, int, 0644);
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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");

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unsigned int wqm_quanta = 0x10000;
module_param(wqm_quanta, int, 0644);
MODULE_PARM_DESC(wqm_quanta, "WQM quanta");

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static bool limit_maxrdreqsz;
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module_param(limit_maxrdreqsz, bool, 0644);
MODULE_PARM_DESC(limit_maxrdreqsz, "Limit max read request size to 256 Bytes");

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LIST_HEAD(nes_adapter_list);
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static LIST_HEAD(nes_dev_list);
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atomic_t qps_destroyed;

static unsigned int ee_flsh_adapter;
static unsigned int sysfs_nonidx_addr;
static unsigned int sysfs_idx_addr;

static struct pci_device_id nes_pci_table[] = {
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	{ PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020), },
	{ PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020_KR), },
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	{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;
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	struct net_device *upper_dev;
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	struct nes_vnic *nesvnic;
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	unsigned int is_bonded;
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	nes_debug(NES_DBG_NETDEV, "nes_inetaddr_event: ip address %pI4, netmask %pI4.\n",
		  &ifa->ifa_address, &ifa->ifa_mask);
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	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);
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		upper_dev = netdev_master_upper_dev_get(netdev);
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		is_bonded = netif_is_bond_slave(netdev) &&
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			    (upper_dev == event_netdev);
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		if ((netdev == event_netdev) || is_bonded) {
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			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;
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					if (is_bonded)
						continue;
					else
						return NOTIFY_OK;
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					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;
					}
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					/* fall through */
				case NETDEV_CHANGEADDR:
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					/* Add the address to the IP table */
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					if (upper_dev)
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						nesvnic->local_ipaddr =
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							((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address;
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					else
						nesvnic->local_ipaddr = ifa->ifa_address;
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					nes_write_indexed(nesdev,
							NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)),
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							ntohl(nesvnic->local_ipaddr));
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					nes_manage_arp_cache(netdev, netdev->dev_addr,
							ntohl(nesvnic->local_ipaddr), NES_ARP_ADD);
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					if (is_bonded)
						continue;
					else
						return NOTIFY_OK;
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					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);

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	nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
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	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",
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				__func__, ibqp->qp_num, nesqp->last_aeq);
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		BUG();
	}

	if (atomic_dec_and_test(&nesqp->refcount)) {
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		if (nesqp->pau_mode)
			nes_destroy_pau_qp(nesdev, nesqp);

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		/* 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);
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		nes_post_cqp_request(nesdev, cqp_request);
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	}
}


/**
 * 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)
{
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	nes_debug(NES_DBG_INIT, "%s: %pM, IRQ %u\n",
		  netdev->name, netdev->dev_addr, netdev->irq);
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}
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/**
 * 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
 */
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static int nes_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
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{
	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)) {
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		ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(64));
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		if (ret < 0) {
			printk(KERN_ERR PFX "64b DMA mask configuration failed\n");
			goto bail2;
		}
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		ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(64));
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		if (ret) {
			printk(KERN_ERR PFX "64b DMA consistent mask configuration failed\n");
			goto bail2;
		}
	} else {
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		ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
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		if (ret < 0) {
			printk(KERN_ERR PFX "32b DMA mask configuration failed\n");
			goto bail2;
		}
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		ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(32));
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		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 */
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	mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0),
				    pci_resource_len(pcidev, BAR_0));
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	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;
	}
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	nesdev->nesadapter->et_rx_coalesce_usecs_irq = interrupt_mod_interval;
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	nesdev->nesadapter->wqm_quanta = wqm_quanta;
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	/* 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;
576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595
	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;
	}
596

597 598 599 600 601 602 603 604 605 606 607 608
	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");
	}

609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
	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) {
626
		nesdev->int_req |= (1 << (PCI_FUNC(nesdev->mac_index)+24));
627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671
	}

	/* 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++;

672 673
	INIT_DELAYED_WORK(&nesdev->work, nes_recheck_link_status);

674
	/* Initialize network devices */
675 676 677
	netdev = nes_netdev_init(nesdev, mmio_regs);
	if (netdev == NULL) {
		ret = -ENOMEM;
678
		goto bail7;
679
	}
680

681 682 683 684 685 686 687
	/* 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;
	}
688

689
	nes_print_macaddr(netdev);
690

691 692
	nesdev->netdev_count++;
	nesdev->nesadapter->netdev_count++;
693

694
	printk(KERN_INFO PFX "%s: NetEffect RNIC driver successfully loaded.\n",
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
			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
 */
754
static void nes_remove(struct pci_dev *pcidev)
755 756 757 758
{
	struct nes_device *nesdev = pci_get_drvdata(pcidev);
	struct net_device *netdev;
	int netdev_index = 0;
759
	unsigned long flags;
760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781

		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);
782 783

	free_irq(pcidev->irq, nesdev);
784 785
	tasklet_kill(&nesdev->dpc_tasklet);

786 787 788 789 790 791 792 793
	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);
	}

794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814
	/* 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 struct pci_driver nes_pci_driver = {
	.name = DRV_NAME,
	.id_table = nes_pci_table,
	.probe = nes_probe,
815
	.remove = nes_remove,
816 817
};

818
static ssize_t adapter_show(struct device_driver *ddp, char *buf)
819 820 821 822 823 824 825 826
{
	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) {
827 828
			devfn = nesdev->pcidev->devfn;
			bus_number = nesdev->pcidev->bus->number;
829 830 831 832 833
			break;
		}
		i++;
	}

834
	return snprintf(buf, PAGE_SIZE, "%x:%x\n", bus_number, devfn);
835 836
}

837
static ssize_t adapter_store(struct device_driver *ddp,
838 839 840 841 842 843 844 845
	const char *buf, size_t count)
{
	char *p = (char *)buf;

	ee_flsh_adapter = simple_strtoul(p, &p, 10);
	return strnlen(buf, count);
}

846
static ssize_t eeprom_cmd_show(struct device_driver *ddp, char *buf)
847 848 849 850 851 852 853 854 855 856 857 858 859 860 861
{
	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);
}

862
static ssize_t eeprom_cmd_store(struct device_driver *ddp,
863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882
	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);
}

883
static ssize_t eeprom_data_show(struct device_driver *ddp, char *buf)
884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899
{
	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);
}

900
static ssize_t eeprom_data_store(struct device_driver *ddp,
901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920
	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);
}

921
static ssize_t flash_cmd_show(struct device_driver *ddp, char *buf)
922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937
{
	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);
}

938
static ssize_t flash_cmd_store(struct device_driver *ddp,
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958
	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);
}

959
static ssize_t flash_data_show(struct device_driver *ddp, char *buf)
960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975
{
	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);
}

976
static ssize_t flash_data_store(struct device_driver *ddp,
977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996
	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);
}

997
static ssize_t nonidx_addr_show(struct device_driver *ddp, char *buf)
998 999 1000 1001
{
	return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_nonidx_addr);
}

1002
static ssize_t nonidx_addr_store(struct device_driver *ddp,
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
	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);
}

1013
static ssize_t nonidx_data_show(struct device_driver *ddp, char *buf)
1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029
{
	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);
}

1030
static ssize_t nonidx_data_store(struct device_driver *ddp,
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
	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);
}

1051
static ssize_t idx_addr_show(struct device_driver *ddp, char *buf)
1052 1053 1054 1055
{
	return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_idx_addr);
}

1056
static ssize_t idx_addr_store(struct device_driver *ddp,
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
	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);
}

1067
static ssize_t idx_data_show(struct device_driver *ddp, char *buf)
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
{
	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);
}

1084
static ssize_t idx_data_store(struct device_driver *ddp,
1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
	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);
}

1105
static ssize_t wqm_quanta_show(struct device_driver *ddp, char *buf)
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118
{
	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++;
	}

1119
	return  snprintf(buf, PAGE_SIZE, "0x%X\n", wqm_quanta_value);
1120 1121
}

1122 1123
static ssize_t wqm_quanta_store(struct device_driver *ddp, const char *buf,
				size_t count)
1124 1125 1126 1127 1128 1129
{
	unsigned long wqm_quanta_value;
	u32 wqm_config1;
	u32 i = 0;
	struct nes_device *nesdev;

1130 1131 1132
	if (kstrtoul(buf, 0, &wqm_quanta_value) < 0)
		return -EINVAL;

1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
	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);
}

1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
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);
1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170

static int nes_create_driver_sysfs(struct pci_driver *drv)
{
	int error;
	error  = driver_create_file(&drv->driver, &driver_attr_adapter);
	error |= driver_create_file(&drv->driver, &driver_attr_eeprom_cmd);
	error |= driver_create_file(&drv->driver, &driver_attr_eeprom_data);
	error |= driver_create_file(&drv->driver, &driver_attr_flash_cmd);
	error |= driver_create_file(&drv->driver, &driver_attr_flash_data);
	error |= driver_create_file(&drv->driver, &driver_attr_nonidx_addr);
	error |= driver_create_file(&drv->driver, &driver_attr_nonidx_data);
	error |= driver_create_file(&drv->driver, &driver_attr_idx_addr);
	error |= driver_create_file(&drv->driver, &driver_attr_idx_data);
1171
	error |= driver_create_file(&drv->driver, &driver_attr_wqm_quanta);
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
	return error;
}

static void nes_remove_driver_sysfs(struct pci_driver *drv)
{
	driver_remove_file(&drv->driver, &driver_attr_adapter);
	driver_remove_file(&drv->driver, &driver_attr_eeprom_cmd);
	driver_remove_file(&drv->driver, &driver_attr_eeprom_data);
	driver_remove_file(&drv->driver, &driver_attr_flash_cmd);
	driver_remove_file(&drv->driver, &driver_attr_flash_data);
	driver_remove_file(&drv->driver, &driver_attr_nonidx_addr);
	driver_remove_file(&drv->driver, &driver_attr_nonidx_data);
	driver_remove_file(&drv->driver, &driver_attr_idx_addr);
	driver_remove_file(&drv->driver, &driver_attr_idx_data);
1186
	driver_remove_file(&drv->driver, &driver_attr_wqm_quanta);
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225
}

/**
 * nes_init_module - module initialization entry point
 */
static int __init nes_init_module(void)
{
	int retval;
	int retval1;

	retval = nes_cm_start();
	if (retval) {
		printk(KERN_ERR PFX "Unable to start NetEffect iWARP CM.\n");
		return retval;
	}
	retval = pci_register_driver(&nes_pci_driver);
	if (retval >= 0) {
		retval1 = nes_create_driver_sysfs(&nes_pci_driver);
		if (retval1 < 0)
			printk(KERN_ERR PFX "Unable to create NetEffect sys files.\n");
	}
	return retval;
}


/**
 * nes_exit_module - module unload entry point
 */
static void __exit nes_exit_module(void)
{
	nes_cm_stop();
	nes_remove_driver_sysfs(&nes_pci_driver);

	pci_unregister_driver(&nes_pci_driver);
}


module_init(nes_init_module);
module_exit(nes_exit_module);