drivers/net/netxen/netxen_nic_ctx.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (C) 2003 - 2009 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 Inc,
  * 18922 Forge Drive
  * Cupertino, CA 95014-0701
  *
  */

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

 #define NXHAL_VERSION	1

 static int
 netxen_api_lock(struct netxen_adapter *adapter)
 {
 	u32 done = 0, timeout = 0;

 	for (;;) {
 		/* Acquire PCIE HW semaphore5 */
 		done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM5_LOCK));

 		if (done == 1)
 			break;

 		if (++timeout >= NX_OS_CRB_RETRY_COUNT) {
 			printk(KERN_ERR "%s: lock timeout.\n", __func__);
 			return -1;
 		}

 		msleep(1);
 	}

 #if 0
 	NXWR32(adapter,
 		NETXEN_API_LOCK_ID, NX_OS_API_LOCK_DRIVER);
 #endif
 	return 0;
 }

 static int
 netxen_api_unlock(struct netxen_adapter *adapter)
 {
 	/* Release PCIE HW semaphore5 */
 	NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM5_UNLOCK));
 	return 0;
 }

 static u32
 netxen_poll_rsp(struct netxen_adapter *adapter)
 {
 	u32 rsp = NX_CDRP_RSP_OK;
 	int	timeout = 0;

 	do {
 		/* give atleast 1ms for firmware to respond */
 		msleep(1);

 		if (++timeout > NX_OS_CRB_RETRY_COUNT)
 			return NX_CDRP_RSP_TIMEOUT;

 		rsp = NXRD32(adapter, NX_CDRP_CRB_OFFSET);
 	} while (!NX_CDRP_IS_RSP(rsp));

 	return rsp;
 }

 static u32
 netxen_issue_cmd(struct netxen_adapter *adapter,
 	u32 pci_fn, u32 version, u32 arg1, u32 arg2, u32 arg3, u32 cmd)
 {
 	u32 rsp;
 	u32 signature = 0;
 	u32 rcode = NX_RCODE_SUCCESS;

 	signature = NX_CDRP_SIGNATURE_MAKE(pci_fn, version);

 	/* Acquire semaphore before accessing CRB */
 	if (netxen_api_lock(adapter))
 		return NX_RCODE_TIMEOUT;

 	NXWR32(adapter, NX_SIGN_CRB_OFFSET, signature);

 	NXWR32(adapter, NX_ARG1_CRB_OFFSET, arg1);

 	NXWR32(adapter, NX_ARG2_CRB_OFFSET, arg2);

 	NXWR32(adapter, NX_ARG3_CRB_OFFSET, arg3);

 	NXWR32(adapter, NX_CDRP_CRB_OFFSET, NX_CDRP_FORM_CMD(cmd));

 	rsp = netxen_poll_rsp(adapter);

 	if (rsp == NX_CDRP_RSP_TIMEOUT) {
 		printk(KERN_ERR "%s: card response timeout.\n",
 				netxen_nic_driver_name);

 		rcode = NX_RCODE_TIMEOUT;
 	} else if (rsp == NX_CDRP_RSP_FAIL) {
 		rcode = NXRD32(adapter, NX_ARG1_CRB_OFFSET);

 		printk(KERN_ERR "%s: failed card response code:0x%x\n",
 				netxen_nic_driver_name, rcode);
 	}

 	/* Release semaphore */
 	netxen_api_unlock(adapter);

 	return rcode;
 }

 int
 nx_fw_cmd_set_mtu(struct netxen_adapter *adapter, int mtu)
 {
 	u32 rcode = NX_RCODE_SUCCESS;
 	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

 	if (recv_ctx->state == NX_HOST_CTX_STATE_ACTIVE)
 		rcode = netxen_issue_cmd(adapter,
 				adapter->ahw.pci_func,
 				NXHAL_VERSION,
 				recv_ctx->context_id,
 				mtu,
 				0,
 				NX_CDRP_CMD_SET_MTU);

 	if (rcode != NX_RCODE_SUCCESS)
 		return -EIO;

 	return 0;
 }

 static int
 nx_fw_cmd_create_rx_ctx(struct netxen_adapter *adapter)
 {
 	void *addr;
 	nx_hostrq_rx_ctx_t *prq;
 	nx_cardrsp_rx_ctx_t *prsp;
 	nx_hostrq_rds_ring_t *prq_rds;
 	nx_hostrq_sds_ring_t *prq_sds;
 	nx_cardrsp_rds_ring_t *prsp_rds;
 	nx_cardrsp_sds_ring_t *prsp_sds;
 	struct nx_host_rds_ring *rds_ring;
 	struct nx_host_sds_ring *sds_ring;

 	dma_addr_t hostrq_phys_addr, cardrsp_phys_addr;
 	u64 phys_addr;

 	int i, nrds_rings, nsds_rings;
 	size_t rq_size, rsp_size;
 	u32 cap, reg, val;

 	int err;

 	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

 	nrds_rings = adapter->max_rds_rings;
 	nsds_rings = adapter->max_sds_rings;

 	rq_size =
 		SIZEOF_HOSTRQ_RX(nx_hostrq_rx_ctx_t, nrds_rings, nsds_rings);
 	rsp_size =
 		SIZEOF_CARDRSP_RX(nx_cardrsp_rx_ctx_t, nrds_rings, nsds_rings);

 	addr = pci_alloc_consistent(adapter->pdev,
 				rq_size, &hostrq_phys_addr);
 	if (addr == NULL)
 		return -ENOMEM;
 	prq = (nx_hostrq_rx_ctx_t *)addr;

 	addr = pci_alloc_consistent(adapter->pdev,
 			rsp_size, &cardrsp_phys_addr);
 	if (addr == NULL) {
 		err = -ENOMEM;
 		goto out_free_rq;
 	}
 	prsp = (nx_cardrsp_rx_ctx_t *)addr;

 	prq->host_rsp_dma_addr = cpu_to_le64(cardrsp_phys_addr);

 	cap = (NX_CAP0_LEGACY_CONTEXT | NX_CAP0_LEGACY_MN);
 	cap |= (NX_CAP0_JUMBO_CONTIGUOUS | NX_CAP0_LRO_CONTIGUOUS);

 	prq->capabilities[0] = cpu_to_le32(cap);
 	prq->host_int_crb_mode =
 		cpu_to_le32(NX_HOST_INT_CRB_MODE_SHARED);
 	prq->host_rds_crb_mode =
 		cpu_to_le32(NX_HOST_RDS_CRB_MODE_UNIQUE);

 	prq->num_rds_rings = cpu_to_le16(nrds_rings);
 	prq->num_sds_rings = cpu_to_le16(nsds_rings);
 	prq->rds_ring_offset = cpu_to_le32(0);

 	val = le32_to_cpu(prq->rds_ring_offset) +
 		(sizeof(nx_hostrq_rds_ring_t) * nrds_rings);
 	prq->sds_ring_offset = cpu_to_le32(val);

 	prq_rds = (nx_hostrq_rds_ring_t *)(prq->data +
 			le32_to_cpu(prq->rds_ring_offset));

 	for (i = 0; i < nrds_rings; i++) {

 		rds_ring = &recv_ctx->rds_rings[i];

 		prq_rds[i].host_phys_addr = cpu_to_le64(rds_ring->phys_addr);
 		prq_rds[i].ring_size = cpu_to_le32(rds_ring->num_desc);
 		prq_rds[i].ring_kind = cpu_to_le32(i);
 		prq_rds[i].buff_size = cpu_to_le64(rds_ring->dma_size);
 	}

 	prq_sds = (nx_hostrq_sds_ring_t *)(prq->data +
 			le32_to_cpu(prq->sds_ring_offset));

 	for (i = 0; i < nsds_rings; i++) {

 		sds_ring = &recv_ctx->sds_rings[i];

 		prq_sds[i].host_phys_addr = cpu_to_le64(sds_ring->phys_addr);
 		prq_sds[i].ring_size = cpu_to_le32(sds_ring->num_desc);
 		prq_sds[i].msi_index = cpu_to_le16(i);
 	}

 	phys_addr = hostrq_phys_addr;
 	err = netxen_issue_cmd(adapter,
 			adapter->ahw.pci_func,
 			NXHAL_VERSION,
 			(u32)(phys_addr >> 32),
 			(u32)(phys_addr & 0xffffffff),
 			rq_size,
 			NX_CDRP_CMD_CREATE_RX_CTX);
 	if (err) {
 		printk(KERN_WARNING
 			"Failed to create rx ctx in firmware%d\n", err);
 		goto out_free_rsp;
 	}


 	prsp_rds = ((nx_cardrsp_rds_ring_t *)
 			 &prsp->data[le32_to_cpu(prsp->rds_ring_offset)]);

 	for (i = 0; i < le16_to_cpu(prsp->num_rds_rings); i++) {
 		rds_ring = &recv_ctx->rds_rings[i];

 		reg = le32_to_cpu(prsp_rds[i].host_producer_crb);
 		rds_ring->crb_rcv_producer = NETXEN_NIC_REG(reg - 0x200);
 	}

 	prsp_sds = ((nx_cardrsp_sds_ring_t *)
 			&prsp->data[le32_to_cpu(prsp->sds_ring_offset)]);

 	for (i = 0; i < le16_to_cpu(prsp->num_sds_rings); i++) {
 		sds_ring = &recv_ctx->sds_rings[i];

 		reg = le32_to_cpu(prsp_sds[i].host_consumer_crb);
 		sds_ring->crb_sts_consumer = NETXEN_NIC_REG(reg - 0x200);

 		reg = le32_to_cpu(prsp_sds[i].interrupt_crb);
 		sds_ring->crb_intr_mask = NETXEN_NIC_REG(reg - 0x200);
 	}

 	recv_ctx->state = le32_to_cpu(prsp->host_ctx_state);
 	recv_ctx->context_id = le16_to_cpu(prsp->context_id);
 	recv_ctx->virt_port = prsp->virt_port;

 out_free_rsp:
 	pci_free_consistent(adapter->pdev, rsp_size, prsp, cardrsp_phys_addr);
 out_free_rq:
 	pci_free_consistent(adapter->pdev, rq_size, prq, hostrq_phys_addr);
 	return err;
 }

 static void
 nx_fw_cmd_destroy_rx_ctx(struct netxen_adapter *adapter)
 {
 	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

 	if (netxen_issue_cmd(adapter,
 			adapter->ahw.pci_func,
 			NXHAL_VERSION,
 			recv_ctx->context_id,
 			NX_DESTROY_CTX_RESET,
 			0,
 			NX_CDRP_CMD_DESTROY_RX_CTX)) {

 		printk(KERN_WARNING
 			"%s: Failed to destroy rx ctx in firmware\n",
 			netxen_nic_driver_name);
 	}
 }

 static int
 nx_fw_cmd_create_tx_ctx(struct netxen_adapter *adapter)
 {
 	nx_hostrq_tx_ctx_t	*prq;
 	nx_hostrq_cds_ring_t	*prq_cds;
 	nx_cardrsp_tx_ctx_t	*prsp;
 	void	*rq_addr, *rsp_addr;
 	size_t	rq_size, rsp_size;
 	u32	temp;
 	int	err = 0;
 	u64	offset, phys_addr;
 	dma_addr_t	rq_phys_addr, rsp_phys_addr;
 	struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
 	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

 	rq_size = SIZEOF_HOSTRQ_TX(nx_hostrq_tx_ctx_t);
 	rq_addr = pci_alloc_consistent(adapter->pdev,
 		rq_size, &rq_phys_addr);
 	if (!rq_addr)
 		return -ENOMEM;

 	rsp_size = SIZEOF_CARDRSP_TX(nx_cardrsp_tx_ctx_t);
 	rsp_addr = pci_alloc_consistent(adapter->pdev,
 		rsp_size, &rsp_phys_addr);
 	if (!rsp_addr) {
 		err = -ENOMEM;
 		goto out_free_rq;
 	}

 	memset(rq_addr, 0, rq_size);
 	prq = (nx_hostrq_tx_ctx_t *)rq_addr;

 	memset(rsp_addr, 0, rsp_size);
 	prsp = (nx_cardrsp_tx_ctx_t *)rsp_addr;

 	prq->host_rsp_dma_addr = cpu_to_le64(rsp_phys_addr);

 	temp = (NX_CAP0_LEGACY_CONTEXT | NX_CAP0_LEGACY_MN | NX_CAP0_LSO);
 	prq->capabilities[0] = cpu_to_le32(temp);

 	prq->host_int_crb_mode =
 		cpu_to_le32(NX_HOST_INT_CRB_MODE_SHARED);

 	prq->interrupt_ctl = 0;
 	prq->msi_index = 0;

 	prq->dummy_dma_addr = cpu_to_le64(adapter->dummy_dma.phys_addr);

 	offset = recv_ctx->phys_addr + sizeof(struct netxen_ring_ctx);
 	prq->cmd_cons_dma_addr = cpu_to_le64(offset);

 	prq_cds = &prq->cds_ring;

 	prq_cds->host_phys_addr = cpu_to_le64(tx_ring->phys_addr);
 	prq_cds->ring_size = cpu_to_le32(tx_ring->num_desc);

 	phys_addr = rq_phys_addr;
 	err = netxen_issue_cmd(adapter,
 			adapter->ahw.pci_func,
 			NXHAL_VERSION,
 			(u32)(phys_addr >> 32),
 			((u32)phys_addr & 0xffffffff),
 			rq_size,
 			NX_CDRP_CMD_CREATE_TX_CTX);

 	if (err == NX_RCODE_SUCCESS) {
 		temp = le32_to_cpu(prsp->cds_ring.host_producer_crb);
 		tx_ring->crb_cmd_producer = NETXEN_NIC_REG(temp - 0x200);
 #if 0
 		adapter->tx_state =
 			le32_to_cpu(prsp->host_ctx_state);
 #endif
 		adapter->tx_context_id =
 			le16_to_cpu(prsp->context_id);
 	} else {
 		printk(KERN_WARNING
 			"Failed to create tx ctx in firmware%d\n", err);
 		err = -EIO;
 	}

 	pci_free_consistent(adapter->pdev, rsp_size, rsp_addr, rsp_phys_addr);

 out_free_rq:
 	pci_free_consistent(adapter->pdev, rq_size, rq_addr, rq_phys_addr);

 	return err;
 }

 static void
 nx_fw_cmd_destroy_tx_ctx(struct netxen_adapter *adapter)
 {
 	if (netxen_issue_cmd(adapter,
 			adapter->ahw.pci_func,
 			NXHAL_VERSION,
 			adapter->tx_context_id,
 			NX_DESTROY_CTX_RESET,
 			0,
 			NX_CDRP_CMD_DESTROY_TX_CTX)) {

 		printk(KERN_WARNING
 			"%s: Failed to destroy tx ctx in firmware\n",
 			netxen_nic_driver_name);
 	}
 }

 static 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)}
 };

 #define CRB_CTX_ADDR_REG_LO(FUNC_ID)	(ctx_addr_sig_regs[FUNC_ID][0])
 #define CRB_CTX_ADDR_REG_HI(FUNC_ID)	(ctx_addr_sig_regs[FUNC_ID][2])
 #define CRB_CTX_SIGNATURE_REG(FUNC_ID)	(ctx_addr_sig_regs[FUNC_ID][1])

 #define lower32(x)	((u32)((x) & 0xffffffff))
 #define upper32(x)	((u32)(((u64)(x) >> 32) & 0xffffffff))

 static struct netxen_recv_crb recv_crb_registers[] = {
 	/* Instance 0 */
 	{
 		/* crb_rcv_producer: */
 		{
 			NETXEN_NIC_REG(0x100),
 			/* Jumbo frames */
 			NETXEN_NIC_REG(0x110),
 			/* LRO */
 			NETXEN_NIC_REG(0x120)
 		},
 		/* crb_sts_consumer: */
 		{
 			NETXEN_NIC_REG(0x138),
 			NETXEN_NIC_REG_2(0x000),
 			NETXEN_NIC_REG_2(0x004),
 			NETXEN_NIC_REG_2(0x008),
 		},
 		/* sw_int_mask */
 		{
 			CRB_SW_INT_MASK_0,
 			NETXEN_NIC_REG_2(0x044),
 			NETXEN_NIC_REG_2(0x048),
 			NETXEN_NIC_REG_2(0x04c),
 		},
 	},
 	/* Instance 1 */
 	{
 		/* crb_rcv_producer: */
 		{
 			NETXEN_NIC_REG(0x144),
 			/* Jumbo frames */
 			NETXEN_NIC_REG(0x154),
 			/* LRO */
 			NETXEN_NIC_REG(0x164)
 		},
 		/* crb_sts_consumer: */
 		{
 			NETXEN_NIC_REG(0x17c),
 			NETXEN_NIC_REG_2(0x020),
 			NETXEN_NIC_REG_2(0x024),
 			NETXEN_NIC_REG_2(0x028),
 		},
 		/* sw_int_mask */
 		{
 			CRB_SW_INT_MASK_1,
 			NETXEN_NIC_REG_2(0x064),
 			NETXEN_NIC_REG_2(0x068),
 			NETXEN_NIC_REG_2(0x06c),
 		},
 	},
 	/* Instance 2 */
 	{
 		/* crb_rcv_producer: */
 		{
 			NETXEN_NIC_REG(0x1d8),
 			/* Jumbo frames */
 			NETXEN_NIC_REG(0x1f8),
 			/* LRO */
 			NETXEN_NIC_REG(0x208)
 		},
 		/* crb_sts_consumer: */
 		{
 			NETXEN_NIC_REG(0x220),
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 		},
 		/* sw_int_mask */
 		{
 			CRB_SW_INT_MASK_2,
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 		},
 	},
 	/* Instance 3 */
 	{
 		/* crb_rcv_producer: */
 		{
 			NETXEN_NIC_REG(0x22c),
 			/* Jumbo frames */
 			NETXEN_NIC_REG(0x23c),
 			/* LRO */
 			NETXEN_NIC_REG(0x24c)
 		},
 		/* crb_sts_consumer: */
 		{
 			NETXEN_NIC_REG(0x264),
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 		},
 		/* sw_int_mask */
 		{
 			CRB_SW_INT_MASK_3,
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 			NETXEN_NIC_REG_2(0x03c),
 		},
 	},
 };

 static int
 netxen_init_old_ctx(struct netxen_adapter *adapter)
 {
 	struct netxen_recv_context *recv_ctx;
 	struct nx_host_rds_ring *rds_ring;
 	struct nx_host_sds_ring *sds_ring;
 	struct nx_host_tx_ring *tx_ring;
 	int ring;
 	int port = adapter->portnum;
 	struct netxen_ring_ctx *hwctx;
 	u32 signature;

 	tx_ring = adapter->tx_ring;
 	recv_ctx = &adapter->recv_ctx;
 	hwctx = recv_ctx->hwctx;

 	hwctx->cmd_ring_addr = cpu_to_le64(tx_ring->phys_addr);
 	hwctx->cmd_ring_size = cpu_to_le32(tx_ring->num_desc);


 	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
 		rds_ring = &recv_ctx->rds_rings[ring];

 		hwctx->rcv_rings[ring].addr =
 			cpu_to_le64(rds_ring->phys_addr);
 		hwctx->rcv_rings[ring].size =
 			cpu_to_le32(rds_ring->num_desc);
 	}

 	for (ring = 0; ring < adapter->max_sds_rings; ring++) {
 		sds_ring = &recv_ctx->sds_rings[ring];

 		if (ring == 0) {
 			hwctx->sts_ring_addr = cpu_to_le64(sds_ring->phys_addr);
 			hwctx->sts_ring_size = cpu_to_le32(sds_ring->num_desc);
 		}
 		hwctx->sts_rings[ring].addr = cpu_to_le64(sds_ring->phys_addr);
 		hwctx->sts_rings[ring].size = cpu_to_le32(sds_ring->num_desc);
 		hwctx->sts_rings[ring].msi_index = cpu_to_le16(ring);
 	}
 	hwctx->sts_ring_count = cpu_to_le32(adapter->max_sds_rings);

 	signature = (adapter->max_sds_rings > 1) ?
 		NETXEN_CTX_SIGNATURE_V2 : NETXEN_CTX_SIGNATURE;

 	NXWR32(adapter, CRB_CTX_ADDR_REG_LO(port),
 			lower32(recv_ctx->phys_addr));
 	NXWR32(adapter, CRB_CTX_ADDR_REG_HI(port),
 			upper32(recv_ctx->phys_addr));
 	NXWR32(adapter, CRB_CTX_SIGNATURE_REG(port),
 			signature | port);
 	return 0;
 }

 int netxen_alloc_hw_resources(struct netxen_adapter *adapter)
 {
 	void *addr;
 	int err = 0;
 	int ring;
 	struct netxen_recv_context *recv_ctx;
 	struct nx_host_rds_ring *rds_ring;
 	struct nx_host_sds_ring *sds_ring;
 	struct nx_host_tx_ring *tx_ring;

 	struct pci_dev *pdev = adapter->pdev;
 	struct net_device *netdev = adapter->netdev;
 	int port = adapter->portnum;

 	recv_ctx = &adapter->recv_ctx;
 	tx_ring = adapter->tx_ring;

 	addr = pci_alloc_consistent(pdev,
 			sizeof(struct netxen_ring_ctx) + sizeof(uint32_t),
 			&recv_ctx->phys_addr);
 	if (addr == NULL) {
 		dev_err(&pdev->dev, "failed to allocate hw context\n");
 		return -ENOMEM;
 	}

 	memset(addr, 0, sizeof(struct netxen_ring_ctx));
 	recv_ctx->hwctx = (struct netxen_ring_ctx *)addr;
 	recv_ctx->hwctx->ctx_id = cpu_to_le32(port);
 	recv_ctx->hwctx->cmd_consumer_offset =
 		cpu_to_le64(recv_ctx->phys_addr +
 			sizeof(struct netxen_ring_ctx));
 	tx_ring->hw_consumer =
 		(__le32 *)(((char *)addr) + sizeof(struct netxen_ring_ctx));

 	/* cmd desc ring */
 	addr = pci_alloc_consistent(pdev, TX_DESC_RINGSIZE(tx_ring),
 			&tx_ring->phys_addr);

 	if (addr == NULL) {
 		dev_err(&pdev->dev, "%s: failed to allocate tx desc ring\n",
 				netdev->name);
 		return -ENOMEM;
 	}

 	tx_ring->desc_head = (struct cmd_desc_type0 *)addr;

 	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
 		rds_ring = &recv_ctx->rds_rings[ring];
 		addr = pci_alloc_consistent(adapter->pdev,
 				RCV_DESC_RINGSIZE(rds_ring),
 				&rds_ring->phys_addr);
 		if (addr == NULL) {
 			dev_err(&pdev->dev,
 				"%s: failed to allocate rds ring [%d]\n",
 				netdev->name, ring);
 			err = -ENOMEM;
 			goto err_out_free;
 		}
 		rds_ring->desc_head = (struct rcv_desc *)addr;

 		if (adapter->fw_major < 4)
 			rds_ring->crb_rcv_producer =
 				recv_crb_registers[port].crb_rcv_producer[ring];
 	}

 	for (ring = 0; ring < adapter->max_sds_rings; ring++) {
 		sds_ring = &recv_ctx->sds_rings[ring];

 		addr = pci_alloc_consistent(adapter->pdev,
 				STATUS_DESC_RINGSIZE(sds_ring),
 				&sds_ring->phys_addr);
 		if (addr == NULL) {
 			dev_err(&pdev->dev,
 				"%s: failed to allocate sds ring [%d]\n",
 				netdev->name, ring);
 			err = -ENOMEM;
 			goto err_out_free;
 		}
 		sds_ring->desc_head = (struct status_desc *)addr;

 		sds_ring->crb_sts_consumer =
 			recv_crb_registers[port].crb_sts_consumer[ring];

 		sds_ring->crb_intr_mask =
 			recv_crb_registers[port].sw_int_mask[ring];
 	}


 	if (adapter->fw_major >= 4) {
 		err = nx_fw_cmd_create_rx_ctx(adapter);
 		if (err)
 			goto err_out_free;
 		err = nx_fw_cmd_create_tx_ctx(adapter);
 		if (err)
 			goto err_out_free;
 	} else {
 		err = netxen_init_old_ctx(adapter);
 		if (err)
 			goto err_out_free;
 	}

 	return 0;

 err_out_free:
 	netxen_free_hw_resources(adapter);
 	return err;
 }

 void netxen_free_hw_resources(struct netxen_adapter *adapter)
 {
 	struct netxen_recv_context *recv_ctx;
 	struct nx_host_rds_ring *rds_ring;
 	struct nx_host_sds_ring *sds_ring;
 	struct nx_host_tx_ring *tx_ring;
 	int ring;

 	int port = adapter->portnum;

 	if (adapter->fw_major >= 4) {
 		nx_fw_cmd_destroy_rx_ctx(adapter);
 		nx_fw_cmd_destroy_tx_ctx(adapter);
 	} else {
 		netxen_api_lock(adapter);
 		NXWR32(adapter, CRB_CTX_SIGNATURE_REG(port),
 				NETXEN_CTX_D3_RESET | port);
 		netxen_api_unlock(adapter);
 	}

 	/* Allow dma queues to drain after context reset */
 	msleep(20);

 	recv_ctx = &adapter->recv_ctx;

 	if (recv_ctx->hwctx != NULL) {
 		pci_free_consistent(adapter->pdev,
 				sizeof(struct netxen_ring_ctx) +
 				sizeof(uint32_t),
 				recv_ctx->hwctx,
 				recv_ctx->phys_addr);
 		recv_ctx->hwctx = NULL;
 	}

 	tx_ring = adapter->tx_ring;
 	if (tx_ring->desc_head != NULL) {
 		pci_free_consistent(adapter->pdev,
 				TX_DESC_RINGSIZE(tx_ring),
 				tx_ring->desc_head, tx_ring->phys_addr);
 		tx_ring->desc_head = NULL;
 	}

 	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
 		rds_ring = &recv_ctx->rds_rings[ring];

 		if (rds_ring->desc_head != NULL) {
 			pci_free_consistent(adapter->pdev,
 					RCV_DESC_RINGSIZE(rds_ring),
 					rds_ring->desc_head,
 					rds_ring->phys_addr);
 			rds_ring->desc_head = NULL;
 		}
 	}

 	for (ring = 0; ring < adapter->max_sds_rings; ring++) {
 		sds_ring = &recv_ctx->sds_rings[ring];

 		if (sds_ring->desc_head != NULL) {
 			pci_free_consistent(adapter->pdev,
 				STATUS_DESC_RINGSIZE(sds_ring),
 				sds_ring->desc_head,
 				sds_ring->phys_addr);
 			sds_ring->desc_head = NULL;
 		}
 	}
 }
	/*
	* Copyright (C) 2003 - 2009 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 Inc,
	* 18922 Forge Drive
	* Cupertino, CA 95014-0701
	*
	*/

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

	#define NXHAL_VERSION 1

	static int
	netxen_api_lock(struct netxen_adapter *adapter)
	{
	u32 done = 0, timeout = 0;

	for (;;) {
	/* Acquire PCIE HW semaphore5 */
	done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM5_LOCK));

	if (done == 1)
	break;

	if (++timeout >= NX_OS_CRB_RETRY_COUNT) {
	printk(KERN_ERR "%s: lock timeout.\n", __func__);
	return -1;
	}

	msleep(1);
	}

	#if 0
	NXWR32(adapter,
	NETXEN_API_LOCK_ID, NX_OS_API_LOCK_DRIVER);
	#endif
	return 0;
	}

	static int
	netxen_api_unlock(struct netxen_adapter *adapter)
	{
	/* Release PCIE HW semaphore5 */
	NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM5_UNLOCK));
	return 0;
	}

	static u32
	netxen_poll_rsp(struct netxen_adapter *adapter)
	{
	u32 rsp = NX_CDRP_RSP_OK;
	int timeout = 0;

	do {
	/* give atleast 1ms for firmware to respond */
	msleep(1);

	if (++timeout > NX_OS_CRB_RETRY_COUNT)
	return NX_CDRP_RSP_TIMEOUT;

	rsp = NXRD32(adapter, NX_CDRP_CRB_OFFSET);
	} while (!NX_CDRP_IS_RSP(rsp));

	return rsp;
	}

	static u32
	netxen_issue_cmd(struct netxen_adapter *adapter,
	u32 pci_fn, u32 version, u32 arg1, u32 arg2, u32 arg3, u32 cmd)
	{
	u32 rsp;
	u32 signature = 0;
	u32 rcode = NX_RCODE_SUCCESS;

	signature = NX_CDRP_SIGNATURE_MAKE(pci_fn, version);

	/* Acquire semaphore before accessing CRB */
	if (netxen_api_lock(adapter))
	return NX_RCODE_TIMEOUT;

	NXWR32(adapter, NX_SIGN_CRB_OFFSET, signature);

	NXWR32(adapter, NX_ARG1_CRB_OFFSET, arg1);

	NXWR32(adapter, NX_ARG2_CRB_OFFSET, arg2);

	NXWR32(adapter, NX_ARG3_CRB_OFFSET, arg3);

	NXWR32(adapter, NX_CDRP_CRB_OFFSET, NX_CDRP_FORM_CMD(cmd));

	rsp = netxen_poll_rsp(adapter);

	if (rsp == NX_CDRP_RSP_TIMEOUT) {
	printk(KERN_ERR "%s: card response timeout.\n",
	netxen_nic_driver_name);

	rcode = NX_RCODE_TIMEOUT;
	} else if (rsp == NX_CDRP_RSP_FAIL) {
	rcode = NXRD32(adapter, NX_ARG1_CRB_OFFSET);

	printk(KERN_ERR "%s: failed card response code:0x%x\n",
	netxen_nic_driver_name, rcode);
	}

	/* Release semaphore */
	netxen_api_unlock(adapter);

	return rcode;
	}

	int
	nx_fw_cmd_set_mtu(struct netxen_adapter *adapter, int mtu)
	{
	u32 rcode = NX_RCODE_SUCCESS;
	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

	if (recv_ctx->state == NX_HOST_CTX_STATE_ACTIVE)
	rcode = netxen_issue_cmd(adapter,
	adapter->ahw.pci_func,
	NXHAL_VERSION,
	recv_ctx->context_id,
	mtu,
	0,
	NX_CDRP_CMD_SET_MTU);

	if (rcode != NX_RCODE_SUCCESS)
	return -EIO;

	return 0;
	}

	static int
	nx_fw_cmd_create_rx_ctx(struct netxen_adapter *adapter)
	{
	void *addr;
	nx_hostrq_rx_ctx_t *prq;
	nx_cardrsp_rx_ctx_t *prsp;
	nx_hostrq_rds_ring_t *prq_rds;
	nx_hostrq_sds_ring_t *prq_sds;
	nx_cardrsp_rds_ring_t *prsp_rds;
	nx_cardrsp_sds_ring_t *prsp_sds;
	struct nx_host_rds_ring *rds_ring;
	struct nx_host_sds_ring *sds_ring;

	dma_addr_t hostrq_phys_addr, cardrsp_phys_addr;
	u64 phys_addr;

	int i, nrds_rings, nsds_rings;
	size_t rq_size, rsp_size;
	u32 cap, reg, val;

	int err;

	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

	nrds_rings = adapter->max_rds_rings;
	nsds_rings = adapter->max_sds_rings;

	rq_size =
	SIZEOF_HOSTRQ_RX(nx_hostrq_rx_ctx_t, nrds_rings, nsds_rings);
	rsp_size =
	SIZEOF_CARDRSP_RX(nx_cardrsp_rx_ctx_t, nrds_rings, nsds_rings);

	addr = pci_alloc_consistent(adapter->pdev,
	rq_size, &hostrq_phys_addr);
	if (addr == NULL)
	return -ENOMEM;
	prq = (nx_hostrq_rx_ctx_t *)addr;

	addr = pci_alloc_consistent(adapter->pdev,
	rsp_size, &cardrsp_phys_addr);
	if (addr == NULL) {
	err = -ENOMEM;
	goto out_free_rq;
	}
	prsp = (nx_cardrsp_rx_ctx_t *)addr;

	prq->host_rsp_dma_addr = cpu_to_le64(cardrsp_phys_addr);

	cap = (NX_CAP0_LEGACY_CONTEXT \| NX_CAP0_LEGACY_MN);
	cap \|= (NX_CAP0_JUMBO_CONTIGUOUS \| NX_CAP0_LRO_CONTIGUOUS);

	prq->capabilities[0] = cpu_to_le32(cap);
	prq->host_int_crb_mode =
	cpu_to_le32(NX_HOST_INT_CRB_MODE_SHARED);
	prq->host_rds_crb_mode =
	cpu_to_le32(NX_HOST_RDS_CRB_MODE_UNIQUE);

	prq->num_rds_rings = cpu_to_le16(nrds_rings);
	prq->num_sds_rings = cpu_to_le16(nsds_rings);
	prq->rds_ring_offset = cpu_to_le32(0);

	val = le32_to_cpu(prq->rds_ring_offset) +
	(sizeof(nx_hostrq_rds_ring_t) * nrds_rings);
	prq->sds_ring_offset = cpu_to_le32(val);

	prq_rds = (nx_hostrq_rds_ring_t *)(prq->data +
	le32_to_cpu(prq->rds_ring_offset));

	for (i = 0; i < nrds_rings; i++) {

	rds_ring = &recv_ctx->rds_rings[i];

	prq_rds[i].host_phys_addr = cpu_to_le64(rds_ring->phys_addr);
	prq_rds[i].ring_size = cpu_to_le32(rds_ring->num_desc);
	prq_rds[i].ring_kind = cpu_to_le32(i);
	prq_rds[i].buff_size = cpu_to_le64(rds_ring->dma_size);
	}

	prq_sds = (nx_hostrq_sds_ring_t *)(prq->data +
	le32_to_cpu(prq->sds_ring_offset));

	for (i = 0; i < nsds_rings; i++) {

	sds_ring = &recv_ctx->sds_rings[i];

	prq_sds[i].host_phys_addr = cpu_to_le64(sds_ring->phys_addr);
	prq_sds[i].ring_size = cpu_to_le32(sds_ring->num_desc);
	prq_sds[i].msi_index = cpu_to_le16(i);
	}

	phys_addr = hostrq_phys_addr;
	err = netxen_issue_cmd(adapter,
	adapter->ahw.pci_func,
	NXHAL_VERSION,
	(u32)(phys_addr >> 32),
	(u32)(phys_addr & 0xffffffff),
	rq_size,
	NX_CDRP_CMD_CREATE_RX_CTX);
	if (err) {
	printk(KERN_WARNING
	"Failed to create rx ctx in firmware%d\n", err);
	goto out_free_rsp;
	}


	prsp_rds = ((nx_cardrsp_rds_ring_t *)
	&prsp->data[le32_to_cpu(prsp->rds_ring_offset)]);

	for (i = 0; i < le16_to_cpu(prsp->num_rds_rings); i++) {
	rds_ring = &recv_ctx->rds_rings[i];

	reg = le32_to_cpu(prsp_rds[i].host_producer_crb);
	rds_ring->crb_rcv_producer = NETXEN_NIC_REG(reg - 0x200);
	}

	prsp_sds = ((nx_cardrsp_sds_ring_t *)
	&prsp->data[le32_to_cpu(prsp->sds_ring_offset)]);

	for (i = 0; i < le16_to_cpu(prsp->num_sds_rings); i++) {
	sds_ring = &recv_ctx->sds_rings[i];

	reg = le32_to_cpu(prsp_sds[i].host_consumer_crb);
	sds_ring->crb_sts_consumer = NETXEN_NIC_REG(reg - 0x200);

	reg = le32_to_cpu(prsp_sds[i].interrupt_crb);
	sds_ring->crb_intr_mask = NETXEN_NIC_REG(reg - 0x200);
	}

	recv_ctx->state = le32_to_cpu(prsp->host_ctx_state);
	recv_ctx->context_id = le16_to_cpu(prsp->context_id);
	recv_ctx->virt_port = prsp->virt_port;

	out_free_rsp:
	pci_free_consistent(adapter->pdev, rsp_size, prsp, cardrsp_phys_addr);
	out_free_rq:
	pci_free_consistent(adapter->pdev, rq_size, prq, hostrq_phys_addr);
	return err;
	}

	static void
	nx_fw_cmd_destroy_rx_ctx(struct netxen_adapter *adapter)
	{
	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

	if (netxen_issue_cmd(adapter,
	adapter->ahw.pci_func,
	NXHAL_VERSION,
	recv_ctx->context_id,
	NX_DESTROY_CTX_RESET,
	0,
	NX_CDRP_CMD_DESTROY_RX_CTX)) {

	printk(KERN_WARNING
	"%s: Failed to destroy rx ctx in firmware\n",
	netxen_nic_driver_name);
	}
	}

	static int
	nx_fw_cmd_create_tx_ctx(struct netxen_adapter *adapter)
	{
	nx_hostrq_tx_ctx_t *prq;
	nx_hostrq_cds_ring_t *prq_cds;
	nx_cardrsp_tx_ctx_t *prsp;
	void rq_addr, rsp_addr;
	size_t rq_size, rsp_size;
	u32 temp;
	int err = 0;
	u64 offset, phys_addr;
	dma_addr_t rq_phys_addr, rsp_phys_addr;
	struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
	struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;

	rq_size = SIZEOF_HOSTRQ_TX(nx_hostrq_tx_ctx_t);
	rq_addr = pci_alloc_consistent(adapter->pdev,
	rq_size, &rq_phys_addr);
	if (!rq_addr)
	return -ENOMEM;

	rsp_size = SIZEOF_CARDRSP_TX(nx_cardrsp_tx_ctx_t);
	rsp_addr = pci_alloc_consistent(adapter->pdev,
	rsp_size, &rsp_phys_addr);
	if (!rsp_addr) {
	err = -ENOMEM;
	goto out_free_rq;
	}

	memset(rq_addr, 0, rq_size);
	prq = (nx_hostrq_tx_ctx_t *)rq_addr;

	memset(rsp_addr, 0, rsp_size);
	prsp = (nx_cardrsp_tx_ctx_t *)rsp_addr;

	prq->host_rsp_dma_addr = cpu_to_le64(rsp_phys_addr);

	temp = (NX_CAP0_LEGACY_CONTEXT \| NX_CAP0_LEGACY_MN \| NX_CAP0_LSO);
	prq->capabilities[0] = cpu_to_le32(temp);

	prq->host_int_crb_mode =
	cpu_to_le32(NX_HOST_INT_CRB_MODE_SHARED);

	prq->interrupt_ctl = 0;
	prq->msi_index = 0;

	prq->dummy_dma_addr = cpu_to_le64(adapter->dummy_dma.phys_addr);

	offset = recv_ctx->phys_addr + sizeof(struct netxen_ring_ctx);
	prq->cmd_cons_dma_addr = cpu_to_le64(offset);

	prq_cds = &prq->cds_ring;

	prq_cds->host_phys_addr = cpu_to_le64(tx_ring->phys_addr);
	prq_cds->ring_size = cpu_to_le32(tx_ring->num_desc);

	phys_addr = rq_phys_addr;
	err = netxen_issue_cmd(adapter,
	adapter->ahw.pci_func,
	NXHAL_VERSION,
	(u32)(phys_addr >> 32),
	((u32)phys_addr & 0xffffffff),
	rq_size,
	NX_CDRP_CMD_CREATE_TX_CTX);

	if (err == NX_RCODE_SUCCESS) {
	temp = le32_to_cpu(prsp->cds_ring.host_producer_crb);
	tx_ring->crb_cmd_producer = NETXEN_NIC_REG(temp - 0x200);
	#if 0
	adapter->tx_state =
	le32_to_cpu(prsp->host_ctx_state);
	#endif
	adapter->tx_context_id =
	le16_to_cpu(prsp->context_id);
	} else {
	printk(KERN_WARNING
	"Failed to create tx ctx in firmware%d\n", err);
	err = -EIO;
	}

	pci_free_consistent(adapter->pdev, rsp_size, rsp_addr, rsp_phys_addr);

	out_free_rq:
	pci_free_consistent(adapter->pdev, rq_size, rq_addr, rq_phys_addr);

	return err;
	}

	static void
	nx_fw_cmd_destroy_tx_ctx(struct netxen_adapter *adapter)
	{
	if (netxen_issue_cmd(adapter,
	adapter->ahw.pci_func,
	NXHAL_VERSION,
	adapter->tx_context_id,
	NX_DESTROY_CTX_RESET,
	0,
	NX_CDRP_CMD_DESTROY_TX_CTX)) {

	printk(KERN_WARNING
	"%s: Failed to destroy tx ctx in firmware\n",
	netxen_nic_driver_name);
	}
	}

	static 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)}
	};

	#define CRB_CTX_ADDR_REG_LO(FUNC_ID) (ctx_addr_sig_regs[FUNC_ID][0])
	#define CRB_CTX_ADDR_REG_HI(FUNC_ID) (ctx_addr_sig_regs[FUNC_ID][2])
	#define CRB_CTX_SIGNATURE_REG(FUNC_ID) (ctx_addr_sig_regs[FUNC_ID][1])

	#define lower32(x) ((u32)((x) & 0xffffffff))
	#define upper32(x) ((u32)(((u64)(x) >> 32) & 0xffffffff))

	static struct netxen_recv_crb recv_crb_registers[] = {
	/* Instance 0 */
	{
	/* crb_rcv_producer: */
	{
	NETXEN_NIC_REG(0x100),
	/* Jumbo frames */
	NETXEN_NIC_REG(0x110),
	/* LRO */
	NETXEN_NIC_REG(0x120)
	},
	/* crb_sts_consumer: */
	{
	NETXEN_NIC_REG(0x138),
	NETXEN_NIC_REG_2(0x000),
	NETXEN_NIC_REG_2(0x004),
	NETXEN_NIC_REG_2(0x008),
	},
	/* sw_int_mask */
	{
	CRB_SW_INT_MASK_0,
	NETXEN_NIC_REG_2(0x044),
	NETXEN_NIC_REG_2(0x048),
	NETXEN_NIC_REG_2(0x04c),
	},
	},
	/* Instance 1 */
	{
	/* crb_rcv_producer: */
	{
	NETXEN_NIC_REG(0x144),
	/* Jumbo frames */
	NETXEN_NIC_REG(0x154),
	/* LRO */
	NETXEN_NIC_REG(0x164)
	},
	/* crb_sts_consumer: */
	{
	NETXEN_NIC_REG(0x17c),
	NETXEN_NIC_REG_2(0x020),
	NETXEN_NIC_REG_2(0x024),
	NETXEN_NIC_REG_2(0x028),
	},
	/* sw_int_mask */
	{
	CRB_SW_INT_MASK_1,
	NETXEN_NIC_REG_2(0x064),
	NETXEN_NIC_REG_2(0x068),
	NETXEN_NIC_REG_2(0x06c),
	},
	},
	/* Instance 2 */
	{
	/* crb_rcv_producer: */
	{
	NETXEN_NIC_REG(0x1d8),
	/* Jumbo frames */
	NETXEN_NIC_REG(0x1f8),
	/* LRO */
	NETXEN_NIC_REG(0x208)
	},
	/* crb_sts_consumer: */
	{
	NETXEN_NIC_REG(0x220),
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	},
	/* sw_int_mask */
	{
	CRB_SW_INT_MASK_2,
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	},
	},
	/* Instance 3 */
	{
	/* crb_rcv_producer: */
	{
	NETXEN_NIC_REG(0x22c),
	/* Jumbo frames */
	NETXEN_NIC_REG(0x23c),
	/* LRO */
	NETXEN_NIC_REG(0x24c)
	},
	/* crb_sts_consumer: */
	{
	NETXEN_NIC_REG(0x264),
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	},
	/* sw_int_mask */
	{
	CRB_SW_INT_MASK_3,
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	NETXEN_NIC_REG_2(0x03c),
	},
	},
	};

	static int
	netxen_init_old_ctx(struct netxen_adapter *adapter)
	{
	struct netxen_recv_context *recv_ctx;
	struct nx_host_rds_ring *rds_ring;
	struct nx_host_sds_ring *sds_ring;
	struct nx_host_tx_ring *tx_ring;
	int ring;
	int port = adapter->portnum;
	struct netxen_ring_ctx *hwctx;
	u32 signature;

	tx_ring = adapter->tx_ring;
	recv_ctx = &adapter->recv_ctx;
	hwctx = recv_ctx->hwctx;

	hwctx->cmd_ring_addr = cpu_to_le64(tx_ring->phys_addr);
	hwctx->cmd_ring_size = cpu_to_le32(tx_ring->num_desc);


	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
	rds_ring = &recv_ctx->rds_rings[ring];

	hwctx->rcv_rings[ring].addr =
	cpu_to_le64(rds_ring->phys_addr);
	hwctx->rcv_rings[ring].size =
	cpu_to_le32(rds_ring->num_desc);
	}

	for (ring = 0; ring < adapter->max_sds_rings; ring++) {
	sds_ring = &recv_ctx->sds_rings[ring];

	if (ring == 0) {
	hwctx->sts_ring_addr = cpu_to_le64(sds_ring->phys_addr);
	hwctx->sts_ring_size = cpu_to_le32(sds_ring->num_desc);
	}
	hwctx->sts_rings[ring].addr = cpu_to_le64(sds_ring->phys_addr);
	hwctx->sts_rings[ring].size = cpu_to_le32(sds_ring->num_desc);
	hwctx->sts_rings[ring].msi_index = cpu_to_le16(ring);
	}
	hwctx->sts_ring_count = cpu_to_le32(adapter->max_sds_rings);

	signature = (adapter->max_sds_rings > 1) ?
	NETXEN_CTX_SIGNATURE_V2 : NETXEN_CTX_SIGNATURE;

	NXWR32(adapter, CRB_CTX_ADDR_REG_LO(port),
	lower32(recv_ctx->phys_addr));
	NXWR32(adapter, CRB_CTX_ADDR_REG_HI(port),
	upper32(recv_ctx->phys_addr));
	NXWR32(adapter, CRB_CTX_SIGNATURE_REG(port),
	signature \| port);
	return 0;
	}

	int netxen_alloc_hw_resources(struct netxen_adapter *adapter)
	{
	void *addr;
	int err = 0;
	int ring;
	struct netxen_recv_context *recv_ctx;
	struct nx_host_rds_ring *rds_ring;
	struct nx_host_sds_ring *sds_ring;
	struct nx_host_tx_ring *tx_ring;

	struct pci_dev *pdev = adapter->pdev;
	struct net_device *netdev = adapter->netdev;
	int port = adapter->portnum;

	recv_ctx = &adapter->recv_ctx;
	tx_ring = adapter->tx_ring;

	addr = pci_alloc_consistent(pdev,
	sizeof(struct netxen_ring_ctx) + sizeof(uint32_t),
	&recv_ctx->phys_addr);
	if (addr == NULL) {
	dev_err(&pdev->dev, "failed to allocate hw context\n");
	return -ENOMEM;
	}

	memset(addr, 0, sizeof(struct netxen_ring_ctx));
	recv_ctx->hwctx = (struct netxen_ring_ctx *)addr;
	recv_ctx->hwctx->ctx_id = cpu_to_le32(port);
	recv_ctx->hwctx->cmd_consumer_offset =
	cpu_to_le64(recv_ctx->phys_addr +
	sizeof(struct netxen_ring_ctx));
	tx_ring->hw_consumer =
	(__le32 )(((char )addr) + sizeof(struct netxen_ring_ctx));

	/* cmd desc ring */
	addr = pci_alloc_consistent(pdev, TX_DESC_RINGSIZE(tx_ring),
	&tx_ring->phys_addr);

	if (addr == NULL) {
	dev_err(&pdev->dev, "%s: failed to allocate tx desc ring\n",
	netdev->name);
	return -ENOMEM;
	}

	tx_ring->desc_head = (struct cmd_desc_type0 *)addr;

	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
	rds_ring = &recv_ctx->rds_rings[ring];
	addr = pci_alloc_consistent(adapter->pdev,
	RCV_DESC_RINGSIZE(rds_ring),
	&rds_ring->phys_addr);
	if (addr == NULL) {
	dev_err(&pdev->dev,
	"%s: failed to allocate rds ring [%d]\n",
	netdev->name, ring);
	err = -ENOMEM;
	goto err_out_free;
	}
	rds_ring->desc_head = (struct rcv_desc *)addr;

	if (adapter->fw_major < 4)
	rds_ring->crb_rcv_producer =
	recv_crb_registers[port].crb_rcv_producer[ring];
	}

	for (ring = 0; ring < adapter->max_sds_rings; ring++) {
	sds_ring = &recv_ctx->sds_rings[ring];

	addr = pci_alloc_consistent(adapter->pdev,
	STATUS_DESC_RINGSIZE(sds_ring),
	&sds_ring->phys_addr);
	if (addr == NULL) {
	dev_err(&pdev->dev,
	"%s: failed to allocate sds ring [%d]\n",
	netdev->name, ring);
	err = -ENOMEM;
	goto err_out_free;
	}
	sds_ring->desc_head = (struct status_desc *)addr;

	sds_ring->crb_sts_consumer =
	recv_crb_registers[port].crb_sts_consumer[ring];

	sds_ring->crb_intr_mask =
	recv_crb_registers[port].sw_int_mask[ring];
	}


	if (adapter->fw_major >= 4) {
	err = nx_fw_cmd_create_rx_ctx(adapter);
	if (err)
	goto err_out_free;
	err = nx_fw_cmd_create_tx_ctx(adapter);
	if (err)
	goto err_out_free;
	} else {
	err = netxen_init_old_ctx(adapter);
	if (err)
	goto err_out_free;
	}

	return 0;

	err_out_free:
	netxen_free_hw_resources(adapter);
	return err;
	}

	void netxen_free_hw_resources(struct netxen_adapter *adapter)
	{
	struct netxen_recv_context *recv_ctx;
	struct nx_host_rds_ring *rds_ring;
	struct nx_host_sds_ring *sds_ring;
	struct nx_host_tx_ring *tx_ring;
	int ring;

	int port = adapter->portnum;

	if (adapter->fw_major >= 4) {
	nx_fw_cmd_destroy_rx_ctx(adapter);
	nx_fw_cmd_destroy_tx_ctx(adapter);
	} else {
	netxen_api_lock(adapter);
	NXWR32(adapter, CRB_CTX_SIGNATURE_REG(port),
	NETXEN_CTX_D3_RESET \| port);
	netxen_api_unlock(adapter);
	}

	/* Allow dma queues to drain after context reset */
	msleep(20);

	recv_ctx = &adapter->recv_ctx;

	if (recv_ctx->hwctx != NULL) {
	pci_free_consistent(adapter->pdev,
	sizeof(struct netxen_ring_ctx) +
	sizeof(uint32_t),
	recv_ctx->hwctx,
	recv_ctx->phys_addr);
	recv_ctx->hwctx = NULL;
	}

	tx_ring = adapter->tx_ring;
	if (tx_ring->desc_head != NULL) {
	pci_free_consistent(adapter->pdev,
	TX_DESC_RINGSIZE(tx_ring),
	tx_ring->desc_head, tx_ring->phys_addr);
	tx_ring->desc_head = NULL;
	}

	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
	rds_ring = &recv_ctx->rds_rings[ring];

	if (rds_ring->desc_head != NULL) {
	pci_free_consistent(adapter->pdev,
	RCV_DESC_RINGSIZE(rds_ring),
	rds_ring->desc_head,
	rds_ring->phys_addr);
	rds_ring->desc_head = NULL;
	}
	}

	for (ring = 0; ring < adapter->max_sds_rings; ring++) {
	sds_ring = &recv_ctx->sds_rings[ring];

	if (sds_ring->desc_head != NULL) {
	pci_free_consistent(adapter->pdev,
	STATUS_DESC_RINGSIZE(sds_ring),
	sds_ring->desc_head,
	sds_ring->phys_addr);
	sds_ring->desc_head = NULL;
	}
	}
	}