Add NetXen 1G/10G ethernet driver.

Signed-off-by: Amit S. Kale <amitkale@netxen.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 1143 insertions, 0 deletions

diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
new file mode 100644
index 000000000000..d122e51e43ab
--- /dev/null
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -0,0 +1,1143 @@
+/*
+ * 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:
+ *    info@netxen.com
+ * NetXen,
+ * 3965 Freedom Circle, Fourth floor,
+ * Santa Clara, CA 95054
+ *
+ *
+ * Source file for NIC routines to initialize the Phantom Hardware
+ *
+ */
+
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include "netxen_nic.h"
+#include "netxen_nic_hw.h"
+#include "netxen_nic_ioctl.h"
+#include "netxen_nic_phan_reg.h"
+
+struct crb_addr_pair {
+	long addr;
+	long data;
+};
+
+#define NETXEN_MAX_CRB_XFORM 60
+static unsigned int crb_addr_xform[NETXEN_MAX_CRB_XFORM];
+#define NETXEN_ADDR_ERROR ((unsigned long ) 0xffffffff )
+
+#define crb_addr_transform(name) \
+	crb_addr_xform[NETXEN_HW_PX_MAP_CRB_##name] = \
+	NETXEN_HW_CRB_HUB_AGT_ADR_##name << 20
+
+static inline void
+netxen_nic_locked_write_reg(struct netxen_adapter *adapter,
+			    unsigned long off, int *data)
+{
+	void __iomem *addr = (adapter->ahw.pci_base + off);
+	writel(*data, addr);
+}
+
+static void crb_addr_transform_setup(void)
+{
+	crb_addr_transform(XDMA);
+	crb_addr_transform(TIMR);
+	crb_addr_transform(SRE);
+	crb_addr_transform(SQN3);
+	crb_addr_transform(SQN2);
+	crb_addr_transform(SQN1);
+	crb_addr_transform(SQN0);
+	crb_addr_transform(SQS3);
+	crb_addr_transform(SQS2);
+	crb_addr_transform(SQS1);
+	crb_addr_transform(SQS0);
+	crb_addr_transform(RPMX7);
+	crb_addr_transform(RPMX6);
+	crb_addr_transform(RPMX5);
+	crb_addr_transform(RPMX4);
+	crb_addr_transform(RPMX3);
+	crb_addr_transform(RPMX2);
+	crb_addr_transform(RPMX1);
+	crb_addr_transform(RPMX0);
+	crb_addr_transform(ROMUSB);
+	crb_addr_transform(SN);
+	crb_addr_transform(QMN);
+	crb_addr_transform(QMS);
+	crb_addr_transform(PGNI);
+	crb_addr_transform(PGND);
+	crb_addr_transform(PGN3);
+	crb_addr_transform(PGN2);
+	crb_addr_transform(PGN1);
+	crb_addr_transform(PGN0);
+	crb_addr_transform(PGSI);
+	crb_addr_transform(PGSD);
+	crb_addr_transform(PGS3);
+	crb_addr_transform(PGS2);
+	crb_addr_transform(PGS1);
+	crb_addr_transform(PGS0);
+	crb_addr_transform(PS);
+	crb_addr_transform(PH);
+	crb_addr_transform(NIU);
+	crb_addr_transform(I2Q);
+	crb_addr_transform(EG);
+	crb_addr_transform(MN);
+	crb_addr_transform(MS);
+	crb_addr_transform(CAS2);
+	crb_addr_transform(CAS1);
+	crb_addr_transform(CAS0);
+	crb_addr_transform(CAM);
+	crb_addr_transform(C2C1);
+	crb_addr_transform(C2C0);
+}
+
+int netxen_init_firmware(struct netxen_adapter *adapter)
+{
+	u32 state = 0, loops = 0, err = 0;
+
+	/* Window 1 call */
+	state = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
+
+	if (state == PHAN_INITIALIZE_ACK)
+		return 0;
+
+	while (state != PHAN_INITIALIZE_COMPLETE && loops < 2000) {
+		udelay(100);
+		/* Window 1 call */
+		state = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
+
+		loops++;
+	}
+	if (loops >= 2000) {
+		printk(KERN_ERR "Cmd Peg initialization not complete:%x.\n",
+		       state);
+		err = -EIO;
+		return err;
+	}
+	/* Window 1 call */
+	writel(PHAN_INITIALIZE_ACK,
+	       NETXEN_CRB_NORMALIZE(adapter, CRB_CMDPEG_STATE));
+
+	return err;
+}
+
+void netxen_initialize_adapter_sw(struct netxen_adapter *adapter)
+{
+	int ctxid, ring;
+	u32 i;
+	u32 num_rx_bufs = 0;
+	struct netxen_rcv_desc_ctx *rcv_desc;
+
+	DPRINTK(INFO, "initializing some queues: %p\n", adapter);
+	for (ctxid = 0; ctxid < MAX_RCV_CTX; ++ctxid) {
+		for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+			struct netxen_rx_buffer *rx_buf;
+			rcv_desc = &adapter->recv_ctx[ctxid].rcv_desc[ring];
+			rcv_desc->rcv_free = rcv_desc->max_rx_desc_count;
+			rcv_desc->begin_alloc = 0;
+			rx_buf = rcv_desc->rx_buf_arr;
+			num_rx_bufs = rcv_desc->max_rx_desc_count;
+			/*
+			 * Now go through all of them, set reference handles
+			 * and put them in the queues.
+			 */
+			for (i = 0; i < num_rx_bufs; i++) {
+				rx_buf->ref_handle = i;
+				rx_buf->state = NETXEN_BUFFER_FREE;
+
+				DPRINTK(INFO, "Rx buf:ctx%d i(%d) rx_buf:"
+					"%p\n", ctxid, i, rx_buf);
+				rx_buf++;
+			}
+		}
+	}
+	DPRINTK(INFO, "initialized buffers for %s and %s\n",
+		"adapter->free_cmd_buf_list", "adapter->free_rxbuf");
+}
+
+void netxen_initialize_adapter_hw(struct netxen_adapter *adapter)
+{
+	if (netxen_nic_get_board_info(adapter) != 0)
+		printk("%s: Error getting board config info.\n",
+		       netxen_nic_driver_name);
+
+	switch (adapter->ahw.board_type) {
+	case NETXEN_NIC_GBE:
+		adapter->ahw.max_ports = 4;
+		break;
+
+	case NETXEN_NIC_XGBE:
+		adapter->ahw.max_ports = 1;
+		break;
+
+	default:
+		printk(KERN_ERR "%s: Unknown board type\n",
+		       netxen_nic_driver_name);
+	}
+}
+
+void netxen_initialize_adapter_ops(struct netxen_adapter *adapter)
+{
+	struct netxen_drvops *ops = adapter->ops;
+	switch (adapter->ahw.board_type) {
+	case NETXEN_NIC_GBE:
+		ops->enable_phy_interrupts =
+		    netxen_niu_gbe_enable_phy_interrupts;
+		ops->disable_phy_interrupts =
+		    netxen_niu_gbe_disable_phy_interrupts;
+		ops->handle_phy_intr = netxen_nic_gbe_handle_phy_intr;
+		ops->macaddr_set = netxen_niu_macaddr_set;
+		ops->set_mtu = netxen_nic_set_mtu_gb;
+		ops->set_promisc = netxen_niu_set_promiscuous_mode;
+		ops->unset_promisc = netxen_niu_set_promiscuous_mode;
+		ops->phy_read = netxen_niu_gbe_phy_read;
+		ops->phy_write = netxen_niu_gbe_phy_write;
+		ops->init_port = netxen_niu_gbe_init_port;
+		ops->init_niu = netxen_nic_init_niu_gb;
+		ops->stop_port = netxen_niu_disable_gbe_port;
+		break;
+
+	case NETXEN_NIC_XGBE:
+		ops->enable_phy_interrupts =
+		    netxen_niu_xgbe_enable_phy_interrupts;
+		ops->disable_phy_interrupts =
+		    netxen_niu_xgbe_disable_phy_interrupts;
+		ops->handle_phy_intr = netxen_nic_xgbe_handle_phy_intr;
+		ops->macaddr_set = netxen_niu_xg_macaddr_set;
+		ops->set_mtu = netxen_nic_set_mtu_xgb;
+		ops->set_promisc = netxen_niu_xg_set_promiscuous_mode;
+		ops->unset_promisc = netxen_niu_xg_set_promiscuous_mode;
+		ops->stop_port = netxen_niu_disable_xg_port;
+		break;
+
+	default:
+		break;
+	}
+}
+
+/*
+ * netxen_decode_crb_addr(0 - utility to translate from internal Phantom CRB
+ * address to external PCI CRB address.
+ */
+unsigned long netxen_decode_crb_addr(unsigned long addr)
+{
+	int i;
+	unsigned long base_addr, offset, pci_base;
+
+	crb_addr_transform_setup();
+
+	pci_base = NETXEN_ADDR_ERROR;
+	base_addr = addr & 0xfff00000;
+	offset = addr & 0x000fffff;
+
+	for (i = 0; i < NETXEN_MAX_CRB_XFORM; i++) {
+		if (crb_addr_xform[i] == base_addr) {
+			pci_base = i << 20;
+			break;
+		}
+	}
+	if (pci_base == NETXEN_ADDR_ERROR)
+		return pci_base;
+	else
+		return (pci_base + offset);
+}
+
+static long rom_max_timeout = 10000;
+static long rom_lock_timeout = 1000000;
+
+static inline int rom_lock(struct netxen_adapter *adapter)
+{
+	int iter;
+	u32 done = 0;
+	int timeout = 0;
+
+	while (!done) {
+		/* acquire semaphore2 from PCI HW block */
+		netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(PCIE_SEM2_LOCK),
+				   &done);
+		if (done == 1)
+			break;
+		if (timeout >= rom_lock_timeout)
+			return -EIO;
+
+		timeout++;
+		/*
+		 * Yield CPU
+		 */
+		if (!in_atomic())
+			schedule();
+		else {
+			for (iter = 0; iter < 20; iter++)
+				cpu_relax();	/*This a nop instr on i386 */
+		}
+	}
+	netxen_nic_reg_write(adapter, NETXEN_ROM_LOCK_ID, ROM_LOCK_DRIVER);
+	return 0;
+}
+
+static inline void rom_unlock(struct netxen_adapter *adapter)
+{
+	u32 val;
+
+	/* release semaphore2 */
+	netxen_nic_read_w0(adapter, NETXEN_PCIE_REG(PCIE_SEM2_UNLOCK), &val);
+
+}
+
+int netxen_wait_rom_done(struct netxen_adapter *adapter)
+{
+	long timeout = 0;
+	long done = 0;
+
+	while (done == 0) {
+		done = netxen_nic_reg_read(adapter, NETXEN_ROMUSB_GLB_STATUS);
+		done &= 2;
+		timeout++;
+		if (timeout >= rom_max_timeout) {
+			printk("Timeout reached  waiting for rom done");
+			return -EIO;
+		}
+	}
+	return 0;
+}
+
+static inline int
+do_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
+{
+	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
+	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
+	udelay(100);		/* prevent bursting on CRB */
+	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
+	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0xb);
+	if (netxen_wait_rom_done(adapter)) {
+		printk("Error waiting for rom done\n");
+		return -EIO;
+	}
+	/* reset abyte_cnt and dummy_byte_cnt */
+	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
+	udelay(100);		/* prevent bursting on CRB */
+	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
+
+	*valp = netxen_nic_reg_read(adapter, NETXEN_ROMUSB_ROM_RDATA);
+	return 0;
+}
+
+int netxen_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
+{
+	int ret;
+
+	if (rom_lock(adapter) != 0)
+		return -EIO;
+
+	ret = do_rom_fast_read(adapter, addr, valp);
+	rom_unlock(adapter);
+	return ret;
+}
+
+#define NETXEN_BOARDTYPE		0x4008
+#define NETXEN_BOARDNUM 		0x400c
+#define NETXEN_CHIPNUM			0x4010
+#define NETXEN_ROMBUS_RESET		0xFFFFFFFF
+#define NETXEN_ROM_FIRST_BARRIER	0x800000000ULL
+#define NETXEN_ROM_FOUND_INIT		0x400
+
+int netxen_pinit_from_rom(struct netxen_adapter *adapter, int verbose)
+{
+	int addr, val, status;
+	int n, i;
+	int init_delay = 0;
+	struct crb_addr_pair *buf;
+	unsigned long off;
+
+	/* resetall */
+	status = netxen_nic_get_board_info(adapter);
+	if (status)
+		printk("%s: pinit_from_rom: Error getting board info\n",
+		       netxen_nic_driver_name);
+
+	netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_GLB_SW_RESET,
+				    NETXEN_ROMBUS_RESET);
+
+	if (verbose) {
+		int val;
+		if (netxen_rom_fast_read(adapter, NETXEN_BOARDTYPE, &val) == 0)
+			printk("P2 ROM board type: 0x%08x\n", val);
+		else
+			printk("Could not read board type\n");
+		if (netxen_rom_fast_read(adapter, NETXEN_BOARDNUM, &val) == 0)
+			printk("P2 ROM board  num: 0x%08x\n", val);
+		else
+			printk("Could not read board number\n");
+		if (netxen_rom_fast_read(adapter, NETXEN_CHIPNUM, &val) == 0)
+			printk("P2 ROM chip   num: 0x%08x\n", val);
+		else
+			printk("Could not read chip number\n");
+	}
+
+	if (netxen_rom_fast_read(adapter, 0, &n) == 0
+	    && (n & NETXEN_ROM_FIRST_BARRIER)) {
+		n &= ~NETXEN_ROM_ROUNDUP;
+		if (n < NETXEN_ROM_FOUND_INIT) {
+			if (verbose)
+				printk("%s: %d CRB init values found"
+				       " in ROM.\n", netxen_nic_driver_name, n);
+		} else {
+			printk("%s:n=0x%x Error! NetXen card flash not"
+			       " initialized.\n", __FUNCTION__, n);
+			return -EIO;
+		}
+		buf = kcalloc(n, sizeof(struct crb_addr_pair), GFP_KERNEL);
+		if (buf == NULL) {
+			printk("%s: pinit_from_rom: Unable to calloc memory.\n",
+			       netxen_nic_driver_name);
+			return -ENOMEM;
+		}
+		for (i = 0; i < n; i++) {
+			if (netxen_rom_fast_read(adapter, 8 * i + 4, &val) != 0
+			    || netxen_rom_fast_read(adapter, 8 * i + 8,
+						    &addr) != 0)
+				return -EIO;
+
+			buf[i].addr = addr;
+			buf[i].data = val;
+
+			if (verbose)
+				printk("%s: PCI:     0x%08x == 0x%08x\n",
+				       netxen_nic_driver_name, (unsigned int)
+				       netxen_decode_crb_addr((unsigned long)
+							      addr), val);
+		}
+		for (i = 0; i < n; i++) {
+
+			off =
+			    netxen_decode_crb_addr((unsigned long)buf[i].addr) +
+			    NETXEN_PCI_CRBSPACE;
+			/* skipping cold reboot MAGIC */
+			if (off == NETXEN_CAM_RAM(0x1fc))
+				continue;
+
+			/* After writing this register, HW needs time for CRB */
+			/* to quiet down (else crb_window returns 0xffffffff) */
+			if (off == NETXEN_ROMUSB_GLB_SW_RESET) {
+				init_delay = 1;
+				/* hold xdma in reset also */
+				buf[i].data = 0x8000ff;
+			}
+
+			if (ADDR_IN_WINDOW1(off)) {
+				writel(buf[i].data,
+				       NETXEN_CRB_NORMALIZE(adapter, off));
+			} else {
+				netxen_nic_pci_change_crbwindow(adapter, 0);
+				writel(buf[i].data,
+				       adapter->ahw.pci_base + off);
+
+				netxen_nic_pci_change_crbwindow(adapter, 1);
+			}
+			if (init_delay == 1) {
+				ssleep(1);
+				init_delay = 0;
+			}
+			msleep(1);
+		}
+		kfree(buf);
+
+		/* disable_peg_cache_all */
+
+		/* unreset_net_cache */
+		netxen_nic_hw_read_wx(adapter, NETXEN_ROMUSB_GLB_SW_RESET, &val,
+				      4);
+		netxen_crb_writelit_adapter(adapter, NETXEN_ROMUSB_GLB_SW_RESET,
+					    (val & 0xffffff0f));
+		/* p2dn replyCount */
+		netxen_crb_writelit_adapter(adapter,
+					    NETXEN_CRB_PEG_NET_D + 0xec, 0x1e);
+		/* disable_peg_cache 0 */
+		netxen_crb_writelit_adapter(adapter,
+					    NETXEN_CRB_PEG_NET_D + 0x4c, 8);
+		/* disable_peg_cache 1 */
+		netxen_crb_writelit_adapter(adapter,
+					    NETXEN_CRB_PEG_NET_I + 0x4c, 8);
+
+		/* peg_clr_all */
+
+		/* peg_clr 0 */
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0x8,
+					    0);
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_0 + 0xc,
+					    0);
+		/* peg_clr 1 */
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0x8,
+					    0);
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_1 + 0xc,
+					    0);
+		/* peg_clr 2 */
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0x8,
+					    0);
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_2 + 0xc,
+					    0);
+		/* peg_clr 3 */
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0x8,
+					    0);
+		netxen_crb_writelit_adapter(adapter, NETXEN_CRB_PEG_NET_3 + 0xc,
+					    0);
+	}
+	return 0;
+}
+
+void netxen_phantom_init(struct netxen_adapter *adapter)
+{
+	u32 val = 0;
+	int loops = 0;
+
+	netxen_nic_hw_read_wx(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE, &val, 4);
+	writel(1,
+	       NETXEN_CRB_NORMALIZE(adapter, NETXEN_ROMUSB_GLB_PEGTUNE_DONE));
+
+	if (0 == val) {
+		while (val != PHAN_INITIALIZE_COMPLETE && loops < 200000) {
+			udelay(100);
+			val =
+			    readl(NETXEN_CRB_NORMALIZE
+				  (adapter, CRB_CMDPEG_STATE));
+			loops++;
+		}
+		if (val != PHAN_INITIALIZE_COMPLETE)
+			printk("WARNING: Initial boot wait loop failed...\n");
+	}
+}
+
+int netxen_nic_rx_has_work(struct netxen_adapter *adapter)
+{
+	int ctx;
+
+	for (ctx = 0; ctx < MAX_RCV_CTX; ++ctx) {
+		struct netxen_recv_context *recv_ctx =
+		    &(adapter->recv_ctx[ctx]);
+		u32 consumer;
+		struct status_desc *desc_head;
+		struct status_desc *desc;	/* used to read status desc here */
+
+		consumer = recv_ctx->status_rx_consumer;
+		desc_head = recv_ctx->rcv_status_desc_head;
+		desc = &desc_head[consumer];
+
+		if (((le16_to_cpu(desc->owner)) & STATUS_OWNER_HOST))
+			return 1;
+	}
+
+	return 0;
+}
+
+void netxen_watchdog_task(unsigned long v)
+{
+	int port_num;
+	struct netxen_port *port;
+	struct net_device *netdev;
+	struct netxen_adapter *adapter = (struct netxen_adapter *)v;
+
+	for (port_num = 0; port_num < adapter->ahw.max_ports; port_num++) {
+		port = adapter->port[port_num];
+		netdev = port->netdev;
+
+		if ((netif_running(netdev)) && !netif_carrier_ok(netdev)) {
+			printk(KERN_INFO "%s port %d, %s carrier is now ok\n",
+			       netxen_nic_driver_name, port_num, netdev->name);
+			netif_carrier_on(netdev);
+		}
+
+		if (netif_queue_stopped(netdev))
+			netif_wake_queue(netdev);
+	}
+
+	netxen_nic_pci_change_crbwindow(adapter, 1);
+
+	if (adapter->ops->handle_phy_intr)
+		adapter->ops->handle_phy_intr(adapter);
+	mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
+}
+
+/*
+ * netxen_process_rcv() send the received packet to the protocol stack.
+ * and if the number of receives exceeds RX_BUFFERS_REFILL, then we
+ * invoke the routine to send more rx buffers to the Phantom...
+ */
+void
+netxen_process_rcv(struct netxen_adapter *adapter, int ctxid,
+		   struct status_desc *desc)
+{
+	struct netxen_port *port = adapter->port[STATUS_DESC_PORT(desc)];
+	struct pci_dev *pdev = port->pdev;
+	struct net_device *netdev = port->netdev;
+	int index = le16_to_cpu(desc->reference_handle);
+	struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
+	struct netxen_rx_buffer *buffer;
+	struct sk_buff *skb;
+	u32 length = le16_to_cpu(desc->total_length);
+	u32 desc_ctx;
+	struct netxen_rcv_desc_ctx *rcv_desc;
+	int ret;
+
+	desc_ctx = STATUS_DESC_TYPE(desc);
+	if (unlikely(desc_ctx >= NUM_RCV_DESC_RINGS)) {
+		printk("%s: %s Bad Rcv descriptor ring\n",
+		       netxen_nic_driver_name, netdev->name);
+		return;
+	}
+
+	rcv_desc = &recv_ctx->rcv_desc[desc_ctx];
+	buffer = &rcv_desc->rx_buf_arr[index];
+
+	pci_unmap_single(pdev, buffer->dma, rcv_desc->dma_size,
+			 PCI_DMA_FROMDEVICE);
+
+	skb = (struct sk_buff *)buffer->skb;
+
+	if (likely(STATUS_DESC_STATUS(desc) == STATUS_CKSUM_OK)) {
+		port->stats.csummed++;
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+	} else
+		skb->ip_summed = CHECKSUM_NONE;
+	skb->dev = netdev;
+	skb_put(skb, length);
+	skb->protocol = eth_type_trans(skb, netdev);
+
+	ret = netif_receive_skb(skb);
+
+	/*
+	 * RH: Do we need these stats on a regular basis. Can we get it from
+	 * Linux stats.
+	 */
+	switch (ret) {
+	case NET_RX_SUCCESS:
+		port->stats.uphappy++;
+		break;
+
+	case NET_RX_CN_LOW:
+		port->stats.uplcong++;
+		break;
+
+	case NET_RX_CN_MOD:
+		port->stats.upmcong++;
+		break;
+
+	case NET_RX_CN_HIGH:
+		port->stats.uphcong++;
+		break;
+
+	case NET_RX_DROP:
+		port->stats.updropped++;
+		break;
+
+	default:
+		port->stats.updunno++;
+		break;
+	}
+
+	netdev->last_rx = jiffies;
+
+	rcv_desc->rcv_free++;
+	rcv_desc->rcv_pending--;
+
+	/*
+	 * We just consumed one buffer so post a buffer.
+	 */
+	adapter->stats.post_called++;
+	buffer->skb = NULL;
+	buffer->state = NETXEN_BUFFER_FREE;
+
+	port->stats.no_rcv++;
+	port->stats.rxbytes += length;
+}
+
+/* Process Receive status ring */
+u32 netxen_process_rcv_ring(struct netxen_adapter *adapter, int ctxid, int max)
+{
+	struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctxid]);
+	struct status_desc *desc_head = recv_ctx->rcv_status_desc_head;
+	struct status_desc *desc;	/* used to read status desc here */
+	u32 consumer = recv_ctx->status_rx_consumer;
+	int count = 0, ring;
+
+	DPRINTK(INFO, "procesing receive\n");
+	/*
+	 * we assume in this case that there is only one port and that is
+	 * port #1...changes need to be done in firmware to indicate port
+	 * number as part of the descriptor. This way we will be able to get
+	 * the netdev which is associated with that device.
+	 */
+	while (count < max) {
+		desc = &desc_head[consumer];
+		if (!((le16_to_cpu(desc->owner)) & STATUS_OWNER_HOST)) {
+			DPRINTK(ERR, "desc %p ownedby %x\n", desc, desc->owner);
+			break;
+		}
+		netxen_process_rcv(adapter, ctxid, desc);
+		desc->owner = STATUS_OWNER_PHANTOM;
+		consumer = (consumer + 1) & (adapter->max_rx_desc_count - 1);
+		count++;
+	}
+	if (count) {
+		for (ring = 0; ring < NUM_RCV_DESC_RINGS; ring++) {
+			netxen_post_rx_buffers(adapter, ctxid, ring);
+		}
+	}
+
+	/* update the consumer index in phantom */
+	if (count) {
+		adapter->stats.process_rcv++;
+		recv_ctx->status_rx_consumer = consumer;
+
+		/* Window = 1 */
+		writel(consumer,
+		       NETXEN_CRB_NORMALIZE(adapter,
+					    recv_crb_registers[ctxid].
+					    crb_rcv_status_consumer));
+	}
+
+	return count;
+}
+
+/* Process Command status ring */
+void netxen_process_cmd_ring(unsigned long data)
+{
+	u32 last_consumer;
+	u32 consumer;
+	struct netxen_adapter *adapter = (struct netxen_adapter *)data;
+	int count = 0;
+	struct netxen_cmd_buffer *buffer;
+	struct netxen_port *port;	/* port #1 */
+	struct netxen_port *nport;
+	struct pci_dev *pdev;
+	struct netxen_skb_frag *frag;
+	u32 i;
+	struct sk_buff *skb = NULL;
+	int p;
+
+	spin_lock(&adapter->tx_lock);
+	last_consumer = adapter->last_cmd_consumer;
+	DPRINTK(INFO, "procesing xmit complete\n");
+	/* we assume in this case that there is only one port and that is
+	 * port #1...changes need to be done in firmware to indicate port
+	 * number as part of the descriptor. This way we will be able to get
+	 * the netdev which is associated with that device.
+	 */
+	/* Window = 1 */
+	consumer =
+	    readl(NETXEN_CRB_NORMALIZE(adapter, CRB_CMD_CONSUMER_OFFSET));
+
+	if (last_consumer == consumer) {	/* Ring is empty    */
+		DPRINTK(INFO, "last_consumer %d == consumer %d\n",
+			last_consumer, consumer);
+		spin_unlock(&adapter->tx_lock);
+		return;
+	}
+
+	adapter->proc_cmd_buf_counter++;
+	adapter->stats.process_xmit++;
+	/*
+	 * Not needed - does not seem to be used anywhere.
+	 * adapter->cmd_consumer = consumer;
+	 */
+	spin_unlock(&adapter->tx_lock);
+
+	while ((last_consumer != consumer) && (count < MAX_STATUS_HANDLE)) {
+		buffer = &adapter->cmd_buf_arr[last_consumer];
+		port = adapter->port[buffer->port];
+		pdev = port->pdev;
+		frag = &buffer->frag_array[0];
+		skb = buffer->skb;
+		if (skb && (cmpxchg(&buffer->skb, skb, 0) == skb)) {
+			pci_unmap_single(pdev, frag->dma, frag->length,
+					 PCI_DMA_TODEVICE);
+			for (i = 1; i < buffer->frag_count; i++) {
+				DPRINTK(INFO, "getting fragment no %d\n", i);
+				frag++;	/* Get the next frag */
+				pci_unmap_page(pdev, frag->dma, frag->length,
+					       PCI_DMA_TODEVICE);
+			}
+
+			port->stats.skbfreed++;
+			dev_kfree_skb_any(skb);
+			skb = NULL;
+		} else if (adapter->proc_cmd_buf_counter == 1) {
+			port->stats.txnullskb++;
+		}
+		if (unlikely(netif_queue_stopped(port->netdev)
+			     && netif_carrier_ok(port->netdev))
+		    && ((jiffies - port->netdev->trans_start) >
+			port->netdev->watchdog_timeo)) {
+			schedule_work(&port->adapter->tx_timeout_task);
+		}
+
+		last_consumer = get_next_index(last_consumer,
+					       adapter->max_tx_desc_count);
+		count++;
+	}
+	adapter->stats.noxmitdone += count;
+
+	count = 0;
+	spin_lock(&adapter->tx_lock);
+	if ((--adapter->proc_cmd_buf_counter) == 0) {
+		adapter->last_cmd_consumer = last_consumer;
+		while ((adapter->last_cmd_consumer != consumer)
+		       && (count < MAX_STATUS_HANDLE)) {
+			buffer =
+			    &adapter->cmd_buf_arr[adapter->last_cmd_consumer];
+			count++;
+			if (buffer->skb)
+				break;
+			else
+				adapter->last_cmd_consumer =
+				    get_next_index(adapter->last_cmd_consumer,
+						   adapter->max_tx_desc_count);
+		}
+	}
+	if (count) {
+		for (p = 0; p < adapter->ahw.max_ports; p++) {
+			nport = adapter->port[p];
+			if (netif_queue_stopped(nport->netdev)
+			    && (nport->flags & NETXEN_NETDEV_STATUS)) {
+				netif_wake_queue(nport->netdev);
+				nport->flags &= ~NETXEN_NETDEV_STATUS;
+			}
+		}
+	}
+
+	spin_unlock(&adapter->tx_lock);
+	DPRINTK(INFO, "last consumer is %d in %s\n", last_consumer,
+		__FUNCTION__);
+}
+
+/*
+ * netxen_post_rx_buffers puts buffer in the Phantom memory
+ */
+void netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ctx, u32 ringid)
+{
+	struct pci_dev *pdev = adapter->ahw.pdev;
+	struct sk_buff *skb;
+	struct netxen_recv_context *recv_ctx = &(adapter->recv_ctx[ctx]);
+	struct netxen_rcv_desc_ctx *rcv_desc = NULL;
+	struct netxen_recv_crb *crbarea = &recv_crb_registers[ctx];
+	struct netxen_rcv_desc_crb *rcv_desc_crb = NULL;
+	u32 producer;
+	struct rcv_desc *pdesc;
+	struct netxen_rx_buffer *buffer;
+	int count = 0;
+	int index = 0;
+
+	adapter->stats.post_called++;
+	rcv_desc = &recv_ctx->rcv_desc[ringid];
+	rcv_desc_crb = &crbarea->rcv_desc_crb[ringid];
+
+	producer = rcv_desc->producer;
+	index = rcv_desc->begin_alloc;
+	buffer = &rcv_desc->rx_buf_arr[index];
+	/* We can start writing rx descriptors into the phantom memory. */
+	while (buffer->state == NETXEN_BUFFER_FREE) {
+		skb = dev_alloc_skb(rcv_desc->skb_size);
+		if (unlikely(!skb)) {
+			/*
+			 * We need to schedule the posting of buffers to the pegs.
+			 */
+			rcv_desc->begin_alloc = index;
+			DPRINTK(ERR, "unm_post_rx_buffers: "
+				" allocated only %d buffers\n", count);
+			break;
+		}
+		count++;	/* now there should be no failure */
+		pdesc = &rcv_desc->desc_head[producer];
+		skb_reserve(skb, NET_IP_ALIGN);
+		/* 
+		 * This will be setup when we receive the
+		 * buffer after it has been filled
+		 * skb->dev = netdev;
+		 */
+		buffer->skb = skb;
+		buffer->state = NETXEN_BUFFER_BUSY;
+		buffer->dma = pci_map_single(pdev, skb->data,
+					     rcv_desc->dma_size,
+					     PCI_DMA_FROMDEVICE);
+		/* make a rcv descriptor  */
+		pdesc->reference_handle = le16_to_cpu(buffer->ref_handle);
+		pdesc->buffer_length = le16_to_cpu(rcv_desc->dma_size);
+		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
+		DPRINTK(INFO, "done writing descripter\n");
+		producer =
+		    get_next_index(producer, rcv_desc->max_rx_desc_count);
+		index = get_next_index(index, rcv_desc->max_rx_desc_count);
+		buffer = &rcv_desc->rx_buf_arr[index];
+	}
+
+	/* if we did allocate buffers, then write the count to Phantom */
+	if (count) {
+		rcv_desc->begin_alloc = index;
+		rcv_desc->rcv_pending += count;
+		adapter->stats.lastposted = count;
+		adapter->stats.posted += count;
+		rcv_desc->producer = producer;
+		if (rcv_desc->rcv_free >= 32) {
+			rcv_desc->rcv_free = 0;
+			/* Window = 1 */
+			writel((producer - 1) &
+			       (rcv_desc->max_rx_desc_count - 1),
+			       NETXEN_CRB_NORMALIZE(adapter,
+						    rcv_desc_crb->
+						    crb_rcv_producer_offset));
+			wmb();
+		}
+	}
+}
+
+int netxen_nic_tx_has_work(struct netxen_adapter *adapter)
+{
+	if (find_diff_among(adapter->last_cmd_consumer,
+			    adapter->cmd_producer,
+			    adapter->max_tx_desc_count) > 0)
+		return 1;
+
+	return 0;
+}
+
+int
+netxen_nic_fill_statistics(struct netxen_adapter *adapter,
+			   struct netxen_port *port,
+			   struct netxen_statistics *netxen_stats)
+{
+	void __iomem *addr;
+
+	if (adapter->ahw.board_type == NETXEN_NIC_XGBE) {
+		netxen_nic_pci_change_crbwindow(adapter, 0);
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_TX_BYTE_CNT,
+					   &(netxen_stats->tx_bytes));
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_TX_FRAME_CNT,
+					   &(netxen_stats->tx_packets));
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_RX_BYTE_CNT,
+					   &(netxen_stats->rx_bytes));
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_RX_FRAME_CNT,
+					   &(netxen_stats->rx_packets));
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_AGGR_ERROR_CNT,
+					   &(netxen_stats->rx_errors));
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_CRC_ERROR_CNT,
+					   &(netxen_stats->rx_crc_errors));
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_OVERSIZE_FRAME_ERR,
+					   &(netxen_stats->
+					     rx_long_length_error));
+		NETXEN_NIC_LOCKED_READ_REG(NETXEN_NIU_XGE_UNDERSIZE_FRAME_ERR,
+					   &(netxen_stats->
+					     rx_short_length_error));
+
+		netxen_nic_pci_change_crbwindow(adapter, 1);
+	} else {
+		spin_lock_bh(&adapter->tx_lock);
+		netxen_stats->tx_bytes = port->stats.txbytes;
+		netxen_stats->tx_packets = port->stats.xmitedframes +
+		    port->stats.xmitfinished;
+		netxen_stats->rx_bytes = port->stats.rxbytes;
+		netxen_stats->rx_packets = port->stats.no_rcv;
+		netxen_stats->rx_errors = port->stats.rcvdbadskb;
+		netxen_stats->tx_errors = port->stats.nocmddescriptor;
+		netxen_stats->rx_short_length_error = port->stats.uplcong;
+		netxen_stats->rx_long_length_error = port->stats.uphcong;
+		netxen_stats->rx_crc_errors = 0;
+		netxen_stats->rx_mac_errors = 0;
+		spin_unlock_bh(&adapter->tx_lock);
+	}
+	return 0;
+}
+
+void netxen_nic_clear_stats(struct netxen_adapter *adapter)
+{
+	struct netxen_port *port;
+	int port_num;
+
+	memset(&adapter->stats, 0, sizeof(adapter->stats));
+	for (port_num = 0; port_num < adapter->ahw.max_ports; port_num++) {
+		port = adapter->port[port_num];
+		memset(&port->stats, 0, sizeof(port->stats));
+	}
+}
+
+int
+netxen_nic_clear_statistics(struct netxen_adapter *adapter,
+			    struct netxen_port *port)
+{
+	int data = 0;
+
+	netxen_nic_pci_change_crbwindow(adapter, 0);
+
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_TX_BYTE_CNT, &data);
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_TX_FRAME_CNT,
+				    &data);
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_RX_BYTE_CNT, &data);
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_RX_FRAME_CNT,
+				    &data);
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_AGGR_ERROR_CNT,
+				    &data);
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_CRC_ERROR_CNT,
+				    &data);
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_OVERSIZE_FRAME_ERR,
+				    &data);
+	netxen_nic_locked_write_reg(adapter, NETXEN_NIU_XGE_UNDERSIZE_FRAME_ERR,
+				    &data);
+
+	netxen_nic_pci_change_crbwindow(adapter, 1);
+	netxen_nic_clear_stats(adapter);
+	return 0;
+}
+
+int
+netxen_nic_do_ioctl(struct netxen_adapter *adapter, void *u_data,
+		    struct netxen_port *port)
+{
+	struct netxen_nic_ioctl_data data;
+	struct netxen_nic_ioctl_data *up_data;
+	int retval = 0;
+	struct netxen_statistics netxen_stats;
+
+	up_data = (void *)u_data;
+
+	DPRINTK(INFO, "doing ioctl for %p\n", adapter);
+	if (copy_from_user(&data, (void __user *)up_data, sizeof(data))) {
+		/* evil user tried to crash the kernel */
+		DPRINTK(ERR, "bad copy from userland: %d\n", (int)sizeof(data));
+		retval = -EFAULT;
+		goto error_out;
+	}
+
+	/* Shouldn't access beyond legal limits of  "char u[64];" member */
+	if (!data.ptr && (data.size > sizeof(data.u))) {
+		/* evil user tried to crash the kernel */
+		DPRINTK(ERR, "bad size: %d\n", data.size);
+		retval = -EFAULT;
+		goto error_out;
+	}
+
+	switch (data.cmd) {
+	case netxen_nic_cmd_pci_read:
+		if ((retval = netxen_nic_hw_read_wx(adapter, data.off,
+						    &(data.u), data.size)))
+			goto error_out;
+		if (copy_to_user
+		    ((void __user *)&(up_data->u), &(data.u), data.size)) {
+			DPRINTK(ERR, "bad copy to userland: %d\n",
+				(int)sizeof(data));
+			retval = -EFAULT;
+			goto error_out;
+		}
+		data.rv = 0;
+		break;
+
+	case netxen_nic_cmd_pci_write:
+		data.rv = netxen_nic_hw_write_wx(adapter, data.off, &(data.u),
+						 data.size);
+		break;
+
+	case netxen_nic_cmd_pci_config_read:
+		switch (data.size) {
+		case 1:
+			data.rv = pci_read_config_byte(adapter->ahw.pdev,
+						       data.off,
+						       (char *)&(data.u));
+			break;
+		case 2:
+			data.rv = pci_read_config_word(adapter->ahw.pdev,
+						       data.off,
+						       (short *)&(data.u));
+			break;
+		case 4:
+			data.rv = pci_read_config_dword(adapter->ahw.pdev,
+							data.off,
+							(u32 *) & (data.u));
+			break;
+		}
+		if (copy_to_user
+		    ((void __user *)&(up_data->u), &(data.u), data.size)) {
+			DPRINTK(ERR, "bad copy to userland: %d\n",
+				(int)sizeof(data));
+			retval = -EFAULT;
+			goto error_out;
+		}
+		break;
+
+	case netxen_nic_cmd_pci_config_write:
+		switch (data.size) {
+		case 1:
+			data.rv = pci_write_config_byte(adapter->ahw.pdev,
+							data.off,
+							*(char *)&(data.u));
+			break;
+		case 2:
+			data.rv = pci_write_config_word(adapter->ahw.pdev,
+							data.off,
+							*(short *)&(data.u));
+			break;
+		case 4:
+			data.rv = pci_write_config_dword(adapter->ahw.pdev,
+							 data.off,
+							 *(u32 *) & (data.u));
+			break;
+		}
+		break;
+
+	case netxen_nic_cmd_get_stats:
+		data.rv =
+		    netxen_nic_fill_statistics(adapter, port, &netxen_stats);
+		if (copy_to_user
+		    ((void __user *)(up_data->ptr), (void *)&netxen_stats,
+		     sizeof(struct netxen_statistics))) {
+			DPRINTK(ERR, "bad copy to userland: %d\n",
+				(int)sizeof(netxen_stats));
+			retval = -EFAULT;
+			goto error_out;
+		}
+		up_data->rv = data.rv;
+		break;
+
+	case netxen_nic_cmd_clear_stats:
+		data.rv = netxen_nic_clear_statistics(adapter, port);
+		up_data->rv = data.rv;
+		break;
+
+	case netxen_nic_cmd_get_version:
+		if (copy_to_user
+		    ((void __user *)&(up_data->u), NETXEN_NIC_LINUX_VERSIONID,
+		     sizeof(NETXEN_NIC_LINUX_VERSIONID))) {
+			DPRINTK(ERR, "bad copy to userland: %d\n",
+				(int)sizeof(data));
+			retval = -EFAULT;
+			goto error_out;
+		}
+		break;
+
+	default:
+		DPRINTK(INFO, "bad command %d for %p\n", data.cmd, adapter);
+		retval = -EOPNOTSUPP;
+		goto error_out;
+	}
+	put_user(data.rv, (u16 __user *) (&(up_data->rv)));
+	DPRINTK(INFO, "done ioctl for %p well.\n", adapter);
+
+      error_out:
+	return retval;
+}