netxen_nic_hw.c

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/*
 * Copyright (C) 2003 - 2006 NetXen, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.
 *
 * Contact Information:
 *    [e-mail]
 * NetXen,
 * 3965 Freedom Circle, Fourth floor,
 * Santa Clara, CA 95054
 *
 *
 * Source file for NIC routines to access the Phantom hardware
 *
 */

#include "netxen_nic.h"
#include "netxen_nic_hw.h"
#define DEFINE_GLOBAL_RECV_CRB
#include "netxen_nic_phan_reg.h"


#include <net/ip.h>

struct netxen_recv_crb recv_crb_registers[] = {
	/*
	 * Instance 0.
	 */
	{
	 /* rcv_desc_crb: */
	 {
	  {
	   /* crb_rcv_producer_offset: */
	   NETXEN_NIC_REG(0x100),
	   /* crb_rcv_consumer_offset: */
	   NETXEN_NIC_REG(0x104),
	   /* crb_gloablrcv_ring: */
	   NETXEN_NIC_REG(0x108),
	   /* crb_rcv_ring_size */
	   NETXEN_NIC_REG(0x10c),

	   },
	  /* Jumbo frames */
	  {
	   /* crb_rcv_producer_offset: */
	   NETXEN_NIC_REG(0x110),
	   /* crb_rcv_consumer_offset: */
	   NETXEN_NIC_REG(0x114),
	   /* crb_gloablrcv_ring: */
	   NETXEN_NIC_REG(0x118),
	   /* crb_rcv_ring_size */
	   NETXEN_NIC_REG(0x11c),
	   },
	  /* LRO */
	  {
	   /* crb_rcv_producer_offset: */
	   NETXEN_NIC_REG(0x120),
	   /* crb_rcv_consumer_offset: */
	   NETXEN_NIC_REG(0x124),
	   /* crb_gloablrcv_ring: */
	   NETXEN_NIC_REG(0x128),
	   /* crb_rcv_ring_size */
	   NETXEN_NIC_REG(0x12c),
	   }
	  },
	 /* crb_rcvstatus_ring: */
	 NETXEN_NIC_REG(0x130),
	 /* crb_rcv_status_producer: */
	 NETXEN_NIC_REG(0x134),
	 /* crb_rcv_status_consumer: */
	 NETXEN_NIC_REG(0x138),
	 /* crb_rcvpeg_state: */
	 NETXEN_NIC_REG(0x13c),
	 /* crb_status_ring_size */
	 NETXEN_NIC_REG(0x140),

	 },
	/*
	 * Instance 1,
	 */
	{
	 /* rcv_desc_crb: */
	 {
	  {
	   /* crb_rcv_producer_offset: */
	   NETXEN_NIC_REG(0x144),
	   /* crb_rcv_consumer_offset: */
	   NETXEN_NIC_REG(0x148),
	   /* crb_globalrcv_ring: */
	   NETXEN_NIC_REG(0x14c),
	   /* crb_rcv_ring_size */
	   NETXEN_NIC_REG(0x150),

	   },
	  /* Jumbo frames */
	  {
	   /* crb_rcv_producer_offset: */
	   NETXEN_NIC_REG(0x154),
	   /* crb_rcv_consumer_offset: */
	   NETXEN_NIC_REG(0x158),
	   /* crb_globalrcv_ring: */
	   NETXEN_NIC_REG(0x15c),
	   /* crb_rcv_ring_size */
	   NETXEN_NIC_REG(0x160),
	   },
	  /* LRO */
	  {
	   /* crb_rcv_producer_offset: */
	   NETXEN_NIC_REG(0x164),
	   /* crb_rcv_consumer_offset: */
	   NETXEN_NIC_REG(0x168),
	   /* crb_globalrcv_ring: */
	   NETXEN_NIC_REG(0x16c),
	   /* crb_rcv_ring_size */
	   NETXEN_NIC_REG(0x170),
	   }

	  },
	 /* crb_rcvstatus_ring: */
	 NETXEN_NIC_REG(0x174),
	 /* crb_rcv_status_producer: */
	 NETXEN_NIC_REG(0x178),
	 /* crb_rcv_status_consumer: */
	 NETXEN_NIC_REG(0x17c),
	 /* crb_rcvpeg_state: */
	 NETXEN_NIC_REG(0x180),
	 /* crb_status_ring_size */
	 NETXEN_NIC_REG(0x184),
	 },
	/*
	 * Instance 2,
	 */
	{
	  {
	    {
	    /* crb_rcv_producer_offset: */
	    NETXEN_NIC_REG(0x1d8),
	    /* crb_rcv_consumer_offset: */
	    NETXEN_NIC_REG(0x1dc),
	    /* crb_gloablrcv_ring: */
	    NETXEN_NIC_REG(0x1f0),
	    /* crb_rcv_ring_size */
	    NETXEN_NIC_REG(0x1f4),
	    },
	    /* Jumbo frames */
	    {
	    /* crb_rcv_producer_offset: */		    
	    NETXEN_NIC_REG(0x1f8),
	    /* crb_rcv_consumer_offset: */
	    NETXEN_NIC_REG(0x1fc),
	    /* crb_gloablrcv_ring: */
	    NETXEN_NIC_REG(0x200),
	    /* crb_rcv_ring_size */
	    NETXEN_NIC_REG(0x204),
	    },
	    /* LRO */
	    {
	    /* crb_rcv_producer_offset: */
	    NETXEN_NIC_REG(0x208),
	    /* crb_rcv_consumer_offset: */
	    NETXEN_NIC_REG(0x20c),
	    /* crb_gloablrcv_ring: */
	    NETXEN_NIC_REG(0x210),
	    /* crb_rcv_ring_size */
	    NETXEN_NIC_REG(0x214),
	    }
	  },
	  /* crb_rcvstatus_ring: */
	  NETXEN_NIC_REG(0x218),
	  /* crb_rcv_status_producer: */
	  NETXEN_NIC_REG(0x21c),
	  /* crb_rcv_status_consumer: */
	  NETXEN_NIC_REG(0x220),
	  /* crb_rcvpeg_state: */
	  NETXEN_NIC_REG(0x224),
	  /* crb_status_ring_size */
	  NETXEN_NIC_REG(0x228),
	},
	/*
	 * Instance 3,
	 */
	{
	  {
	    {
	    /* crb_rcv_producer_offset: */
	    NETXEN_NIC_REG(0x22c),
	    /* crb_rcv_consumer_offset: */
	    NETXEN_NIC_REG(0x230),
	    /* crb_gloablrcv_ring: */
	    NETXEN_NIC_REG(0x234),
	    /* crb_rcv_ring_size */
	    NETXEN_NIC_REG(0x238),
	    },
	    /* Jumbo frames */
	    {
	    /* crb_rcv_producer_offset: */ 
	    NETXEN_NIC_REG(0x23c),
	    /* crb_rcv_consumer_offset: */
	    NETXEN_NIC_REG(0x240),
	    /* crb_gloablrcv_ring: */
	    NETXEN_NIC_REG(0x244),
	    /* crb_rcv_ring_size */
	    NETXEN_NIC_REG(0x248),
	    },
	    /* LRO */
	    {
	    /* crb_rcv_producer_offset: */
	    NETXEN_NIC_REG(0x24c),
	    /* crb_rcv_consumer_offset: */
	    NETXEN_NIC_REG(0x250),
	    /* crb_gloablrcv_ring: */
	    NETXEN_NIC_REG(0x254),
	    /* crb_rcv_ring_size */
	    NETXEN_NIC_REG(0x258),
	    }
	  },
	  /* crb_rcvstatus_ring: */
	  NETXEN_NIC_REG(0x25c),
	  /* crb_rcv_status_producer: */
	  NETXEN_NIC_REG(0x260),
	  /* crb_rcv_status_consumer: */
	  NETXEN_NIC_REG(0x264),
	  /* crb_rcvpeg_state: */
	  NETXEN_NIC_REG(0x268),
	  /* crb_status_ring_size */
	  NETXEN_NIC_REG(0x26c),
	},
};

u64 ctx_addr_sig_regs[][3] = {
	{NETXEN_NIC_REG(0x188), NETXEN_NIC_REG(0x18c), NETXEN_NIC_REG(0x1c0)},
	{NETXEN_NIC_REG(0x190), NETXEN_NIC_REG(0x194), NETXEN_NIC_REG(0x1c4)},
	{NETXEN_NIC_REG(0x198), NETXEN_NIC_REG(0x19c), NETXEN_NIC_REG(0x1c8)},
	{NETXEN_NIC_REG(0x1a0), NETXEN_NIC_REG(0x1a4), NETXEN_NIC_REG(0x1cc)}
};


/*  PCI Windowing for DDR regions.  */

#define ADDR_IN_RANGE(addr, low, high)	\
	(((addr) <= (high)) && ((addr) >= (low)))

#define NETXEN_FLASH_BASE	(NETXEN_BOOTLD_START)
#define NETXEN_PHANTOM_MEM_BASE	(NETXEN_FLASH_BASE)
#define NETXEN_MAX_MTU		8000 + NETXEN_ENET_HEADER_SIZE + NETXEN_ETH_FCS_SIZE
#define NETXEN_MIN_MTU		64
#define NETXEN_ETH_FCS_SIZE     4
#define NETXEN_ENET_HEADER_SIZE 14
#define NETXEN_WINDOW_ONE 	0x2000000	/*CRB Window: bit 25 of CRB address */
#define NETXEN_FIRMWARE_LEN 	((16 * 1024) / 4)
#define NETXEN_NIU_HDRSIZE	(0x1 << 6)
#define NETXEN_NIU_TLRSIZE	(0x1 << 5)

#define lower32(x)		((u32)((x) & 0xffffffff))
#define upper32(x)			\
	((u32)(((unsigned long long)(x) >> 32) & 0xffffffff))

#define NETXEN_NIC_ZERO_PAUSE_ADDR     0ULL
#define NETXEN_NIC_UNIT_PAUSE_ADDR     0x200ULL
#define NETXEN_NIC_EPG_PAUSE_ADDR1     0x2200010000c28001ULL
#define NETXEN_NIC_EPG_PAUSE_ADDR2     0x0100088866554433ULL

#define NETXEN_NIC_WINDOW_MARGIN 0x100000

unsigned long netxen_nic_pci_set_window(struct netxen_adapter *adapter,
					unsigned long long addr);
void netxen_free_hw_resources(struct netxen_adapter *adapter);

int netxen_nic_set_mac(struct net_device *netdev, void *p)
{
	struct netxen_adapter *adapter = netdev_priv(netdev);
	struct sockaddr *addr = p;

	if (netif_running(netdev))
		return -EBUSY;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	DPRINTK(INFO, "valid ether addr\n");
	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);

	if (adapter->macaddr_set)
		adapter->macaddr_set(adapter, addr->sa_data);

	return 0;
}

/*
 * netxen_nic_set_multi - Multicast
 */
void netxen_nic_set_multi(struct net_device *netdev)
{
	struct netxen_adapter *adapter = netdev_priv(netdev);
	struct dev_mc_list *mc_ptr;

	mc_ptr = netdev->mc_list;
	if (netdev->flags & IFF_PROMISC) {
		if (adapter->set_promisc)
			adapter->set_promisc(adapter,
					     NETXEN_NIU_PROMISC_MODE);
	} else {
		if (adapter->unset_promisc)
			adapter->unset_promisc(adapter,
					       NETXEN_NIU_NON_PROMISC_MODE);
	}
}

/*
 * netxen_nic_change_mtu - Change the Maximum Transfer Unit
 * @returns 0 on success, negative on failure
 */
int netxen_nic_change_mtu(struct net_device *netdev, int mtu)
{
	struct netxen_adapter *adapter = netdev_priv(netdev);
	int eff_mtu = mtu + NETXEN_ENET_HEADER_SIZE + NETXEN_ETH_FCS_SIZE;

	if ((eff_mtu > NETXEN_MAX_MTU) || (eff_mtu < NETXEN_MIN_MTU)) {
		printk(KERN_ERR "%s: %s %d is not supported.\n",
		       netxen_nic_driver_name, netdev->name, mtu);
		return -EINVAL;
	}

	if (adapter->set_mtu)
		adapter->set_mtu(adapter, mtu);
	netdev->mtu = mtu;

	return 0;
}

/*
 * check if the firmware has been downloaded and ready to run  and
 * setup the address for the descriptors in the adapter
 */
int netxen_nic_hw_resources(struct netxen_adapter *adapter)
{
	struct netxen_hardware_context *hw = &adapter->ahw;
	u32 state = 0;
	void *addr;
	int loops = 0, err = 0;
	int ctx, ring;
	struct netxen_recv_context *recv_ctx;
	struct netxen_rcv_desc_ctx *rcv_desc;
	int func_id = adapter->portnum;

	DPRINTK(INFO, "crb_base: %lx %x", NETXEN_PCI_CRBSPACE,
		PCI_OFFSET_SECOND_RANGE(adapter, NETXEN_PCI_CRBSPACE));
	DPRINTK(INFO, "cam base: %lx %x", NETXEN_CRB_CAM,
		pci_base_offset(adapter, NETXEN_CRB_CAM));
	DPRINTK(INFO, "cam RAM: %lx %x", NETXEN_CAM_RAM_BASE,
		pci_base_offset(adapter, NETXEN_CAM_RAM_BASE));


	for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
		DPRINTK(INFO, "Command Peg ready..waiting for rcv peg\n");
		loops = 0;
		state = 0;
		/* Window 1 call */
		state = readl(NETXEN_CRB_NORMALIZE(adapter,
						   recv_crb_registers[ctx].
						   crb_rcvpeg_state));
		while (state != PHAN_PEG_RCV_INITIALIZED && loops < 20) {
			msleep(1);
			/* Window 1 call */
			state = readl(NETXEN_CRB_NORMALIZE(adapter,
							   recv_crb_registers
							   [ctx].
							   crb_rcvpeg_state));
			loops++;
		}
		if (loops >= 20) {
			printk(KERN_ERR "Rcv Peg initialization not complete:"
			       "%x.\n", state);
			err = -EIO;
			return err;
		}
	}
	adapter->intr_scheme = readl(
		NETXEN_CRB_NORMALIZE(adapter, CRB_NIC_CAPABILITIES_FW));
	printk(KERN_NOTICE "%s: FW capabilities:0x%x\n", netxen_nic_driver_name,
			adapter->intr_scheme);
	DPRINTK(INFO, "Receive Peg ready too. starting stuff\n");

	addr = netxen_alloc(adapter->ahw.pdev,