qlcnic: Qlogic ethernet driver for CNA devices

o 1G/10G Ethernet Driver for Qlgic QLE8240 and QLE8242 CNA devices.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/qlcnic/Makefile

+#
+# Makefile for Qlogic 1G/10G Ethernet Driver for CNA devices
+#
+
+obj-$(CONFIG_QLCNIC) := qlcnic.o
+
+qlcnic-y := qlcnic_hw.o qlcnic_main.o qlcnic_init.o \
+	qlcnic_ethtool.o qlcnic_ctx.o

drivers/net/qlcnic/qlcnic_ctx.c

+/*
+ * Copyright (C) 2009 - QLogic Corporation.
+ * 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 "COPYING".
+ *
+ */
+
+#include "qlcnic.h"
+
+#define QLCHAL_VERSION	1
+
+static u32
+qlcnic_poll_rsp(struct qlcnic_adapter *adapter)
+{
+	u32 rsp;
+	int timeout = 0;
+
+	do {
+		/* give atleast 1ms for firmware to respond */
+		msleep(1);
+
+		if (++timeout > QLCNIC_OS_CRB_RETRY_COUNT)
+			return QLCNIC_CDRP_RSP_TIMEOUT;
+
+		rsp = QLCRD32(adapter, QLCNIC_CDRP_CRB_OFFSET);
+	} while (!QLCNIC_CDRP_IS_RSP(rsp));
+
+	return rsp;
+}
+
+static u32
+qlcnic_issue_cmd(struct qlcnic_adapter *adapter,
+	u32 pci_fn, u32 version, u32 arg1, u32 arg2, u32 arg3, u32 cmd)
+{
+	u32 rsp;
+	u32 signature;
+	u32 rcode = QLCNIC_RCODE_SUCCESS;
+	struct pci_dev *pdev = adapter->pdev;
+
+	signature = QLCNIC_CDRP_SIGNATURE_MAKE(pci_fn, version);
+
+	/* Acquire semaphore before accessing CRB */
+	if (qlcnic_api_lock(adapter))
+		return QLCNIC_RCODE_TIMEOUT;
+
+	QLCWR32(adapter, QLCNIC_SIGN_CRB_OFFSET, signature);
+	QLCWR32(adapter, QLCNIC_ARG1_CRB_OFFSET, arg1);
+	QLCWR32(adapter, QLCNIC_ARG2_CRB_OFFSET, arg2);
+	QLCWR32(adapter, QLCNIC_ARG3_CRB_OFFSET, arg3);
+	QLCWR32(adapter, QLCNIC_CDRP_CRB_OFFSET, QLCNIC_CDRP_FORM_CMD(cmd));
+
+	rsp = qlcnic_poll_rsp(adapter);
+
+	if (rsp == QLCNIC_CDRP_RSP_TIMEOUT) {
+		dev_err(&pdev->dev, "card response timeout.\n");
+		rcode = QLCNIC_RCODE_TIMEOUT;
+	} else if (rsp == QLCNIC_CDRP_RSP_FAIL) {
+		rcode = QLCRD32(adapter, QLCNIC_ARG1_CRB_OFFSET);
+		dev_err(&pdev->dev, "failed card response code:0x%x\n",
+				rcode);
+	}
+
+	/* Release semaphore */
+	qlcnic_api_unlock(adapter);
+
+	return rcode;
+}
+
+int
+qlcnic_fw_cmd_set_mtu(struct qlcnic_adapter *adapter, int mtu)
+{
+	struct qlcnic_recv_context *recv_ctx = &adapter->recv_ctx;
+
+	if (recv_ctx->state == QLCNIC_HOST_CTX_STATE_ACTIVE) {
+		if (qlcnic_issue_cmd(adapter,
+				adapter->ahw.pci_func,
+				QLCHAL_VERSION,
+				recv_ctx->context_id,
+				mtu,
+				0,
+				QLCNIC_CDRP_CMD_SET_MTU)) {
+
+			dev_err(&adapter->pdev->dev, "Failed to set mtu\n");
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static int
+qlcnic_fw_cmd_create_rx_ctx(struct qlcnic_adapter *adapter)
+{
+	void *addr;
+	struct qlcnic_hostrq_rx_ctx *prq;
+	struct qlcnic_cardrsp_rx_ctx *prsp;
+	struct qlcnic_hostrq_rds_ring *prq_rds;
+	struct qlcnic_hostrq_sds_ring *prq_sds;
+	struct qlcnic_cardrsp_rds_ring *prsp_rds;
+	struct qlcnic_cardrsp_sds_ring *prsp_sds;
+	struct qlcnic_host_rds_ring *rds_ring;
+	struct qlcnic_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 qlcnic_recv_context *recv_ctx = &adapter->recv_ctx;
+
+	nrds_rings = adapter->max_rds_rings;
+	nsds_rings = adapter->max_sds_rings;
+
+	rq_size =
+		SIZEOF_HOSTRQ_RX(struct qlcnic_hostrq_rx_ctx, nrds_rings,
+						nsds_rings);
+	rsp_size =
+		SIZEOF_CARDRSP_RX(struct qlcnic_cardrsp_rx_ctx, nrds_rings,
+						nsds_rings);
+
+	addr = pci_alloc_consistent(adapter->pdev,
+				rq_size, &hostrq_phys_addr);
+	if (addr == NULL)
+		return -ENOMEM;
+	prq = (struct qlcnic_hostrq_rx_ctx *)addr;
+
+	addr = pci_alloc_consistent(adapter->pdev,
+			rsp_size, &cardrsp_phys_addr);
+	if (addr == NULL) {
+		err = -ENOMEM;
+		goto out_free_rq;
+	}
+	prsp = (struct qlcnic_cardrsp_rx_ctx *)addr;
+
+	prq->host_rsp_dma_addr = cpu_to_le64(cardrsp_phys_addr);
+
+	cap = (QLCNIC_CAP0_LEGACY_CONTEXT | QLCNIC_CAP0_LEGACY_MN);
+	cap |= (QLCNIC_CAP0_JUMBO_CONTIGUOUS | QLCNIC_CAP0_LRO_CONTIGUOUS);
+
+	prq->capabilities[0] = cpu_to_le32(cap);
+	prq->host_int_crb_mode =
+		cpu_to_le32(QLCNIC_HOST_INT_CRB_MODE_SHARED);
+	prq->host_rds_crb_mode =
+		cpu_to_le32(QLCNIC_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(struct qlcnic_hostrq_rds_ring) * nrds_rings);
+	prq->sds_ring_offset = cpu_to_le32(val);
+
+	prq_rds = (struct qlcnic_hostrq_rds_ring *)(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 = (struct qlcnic_hostrq_sds_ring *)(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 = qlcnic_issue_cmd(adapter,
+			adapter->ahw.pci_func,
+			QLCHAL_VERSION,
+			(u32)(phys_addr >> 32),
+			(u32)(phys_addr & 0xffffffff),
+			rq_size,
+			QLCNIC_CDRP_CMD_CREATE_RX_CTX);
+	if (err) {
+		dev_err(&adapter->pdev->dev,
+			"Failed to create rx ctx in firmware%d\n", err);
+		goto out_free_rsp;
+	}
+
+
+	prsp_rds = ((struct qlcnic_cardrsp_rds_ring *)
+			 &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 = qlcnic_get_ioaddr(adapter,
+				QLCNIC_REG(reg - 0x200));
+	}
+
+	prsp_sds = ((struct qlcnic_cardrsp_sds_ring *)
+			&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 = qlcnic_get_ioaddr(adapter,
+				QLCNIC_REG(reg - 0x200));
+
+		reg = le32_to_cpu(prsp_sds[i].interrupt_crb);
+		sds_ring->crb_intr_mask = qlcnic_get_ioaddr(adapter,
+				QLCNIC_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
+qlcnic_fw_cmd_destroy_rx_ctx(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_recv_context *recv_ctx = &adapter->recv_ctx;
+
+	if (qlcnic_issue_cmd(adapter,
+			adapter->ahw.pci_func,
+			QLCHAL_VERSION,
+			recv_ctx->context_id,
+			QLCNIC_DESTROY_CTX_RESET,
+			0,
+			QLCNIC_CDRP_CMD_DESTROY_RX_CTX)) {
+
+		dev_err(&adapter->pdev->dev,
+			"Failed to destroy rx ctx in firmware\n");
+	}
+}
+
+static int
+qlcnic_fw_cmd_create_tx_ctx(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_hostrq_tx_ctx	*prq;
+	struct qlcnic_hostrq_cds_ring	*prq_cds;
+	struct qlcnic_cardrsp_tx_ctx	*prsp;
+	void	*rq_addr, *rsp_addr;
+	size_t	rq_size, rsp_size;
+	u32	temp;
+	int	err;
+	u64	phys_addr;
+	dma_addr_t	rq_phys_addr, rsp_phys_addr;
+	struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
+
+	rq_size = SIZEOF_HOSTRQ_TX(struct qlcnic_hostrq_tx_ctx);
+	rq_addr = pci_alloc_consistent(adapter->pdev,
+		rq_size, &rq_phys_addr);
+	if (!rq_addr)
+		return -ENOMEM;
+
+	rsp_size = SIZEOF_CARDRSP_TX(struct qlcnic_cardrsp_tx_ctx);
+	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 = (struct qlcnic_hostrq_tx_ctx *)rq_addr;
+
+	memset(rsp_addr, 0, rsp_size);
+	prsp = (struct qlcnic_cardrsp_tx_ctx *)rsp_addr;
+
+	prq->host_rsp_dma_addr = cpu_to_le64(rsp_phys_addr);
+
+	temp = (QLCNIC_CAP0_LEGACY_CONTEXT | QLCNIC_CAP0_LEGACY_MN |
+					QLCNIC_CAP0_LSO);
+	prq->capabilities[0] = cpu_to_le32(temp);
+
+	prq->host_int_crb_mode =
+		cpu_to_le32(QLCNIC_HOST_INT_CRB_MODE_SHARED);
+
+	prq->interrupt_ctl = 0;
+	prq->msi_index = 0;
+	prq->cmd_cons_dma_addr = cpu_to_le64(tx_ring->hw_cons_phys_addr);
+
+	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 = qlcnic_issue_cmd(adapter,
+			adapter->ahw.pci_func,
+			QLCHAL_VERSION,
+			(u32)(phys_addr >> 32),
+			((u32)phys_addr & 0xffffffff),
+			rq_size,
+			QLCNIC_CDRP_CMD_CREATE_TX_CTX);
+
+	if (err == QLCNIC_RCODE_SUCCESS) {
+		temp = le32_to_cpu(prsp->cds_ring.host_producer_crb);
+		tx_ring->crb_cmd_producer = qlcnic_get_ioaddr(adapter,
+				QLCNIC_REG(temp - 0x200));
+
+		adapter->tx_context_id =
+			le16_to_cpu(prsp->context_id);
+	} else {
+		dev_err(&adapter->pdev->dev,
+			"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
+qlcnic_fw_cmd_destroy_tx_ctx(struct qlcnic_adapter *adapter)
+{
+	if (qlcnic_issue_cmd(adapter,
+			adapter->ahw.pci_func,
+			QLCHAL_VERSION,
+			adapter->tx_context_id,
+			QLCNIC_DESTROY_CTX_RESET,
+			0,
+			QLCNIC_CDRP_CMD_DESTROY_TX_CTX)) {
+
+		dev_err(&adapter->pdev->dev,
+			"Failed to destroy tx ctx in firmware\n");
+	}
+}
+
+int
+qlcnic_fw_cmd_query_phy(struct qlcnic_adapter *adapter, u32 reg, u32 *val)
+{
+
+	if (qlcnic_issue_cmd(adapter,
+			adapter->ahw.pci_func,
+			QLCHAL_VERSION,
+			reg,
+			0,
+			0,
+			QLCNIC_CDRP_CMD_READ_PHY)) {
+
+		return -EIO;
+	}
+
+	return QLCRD32(adapter, QLCNIC_ARG1_CRB_OFFSET);
+}
+
+int
+qlcnic_fw_cmd_set_phy(struct qlcnic_adapter *adapter, u32 reg, u32 val)
+{
+	return qlcnic_issue_cmd(adapter,
+			adapter->ahw.pci_func,
+			QLCHAL_VERSION,
+			reg,
+			val,
+			0,
+			QLCNIC_CDRP_CMD_WRITE_PHY);
+}
+
+int qlcnic_alloc_hw_resources(struct qlcnic_adapter *adapter)
+{
+	void *addr;
+	int err;
+	int ring;
+	struct qlcnic_recv_context *recv_ctx;
+	struct qlcnic_host_rds_ring *rds_ring;
+	struct qlcnic_host_sds_ring *sds_ring;
+	struct qlcnic_host_tx_ring *tx_ring;
+
+	struct pci_dev *pdev = adapter->pdev;
+
+	recv_ctx = &adapter->recv_ctx;
+	tx_ring = adapter->tx_ring;
+
+	tx_ring->hw_consumer = (__le32 *)pci_alloc_consistent(pdev, sizeof(u32),
+						&tx_ring->hw_cons_phys_addr);
+	if (tx_ring->hw_consumer == NULL) {
+		dev_err(&pdev->dev, "failed to allocate tx consumer\n");
+		return -ENOMEM;
+	}
+	*(tx_ring->hw_consumer) = 0;
+
+	/* cmd desc ring */
+	addr = pci_alloc_consistent(pdev, TX_DESC_RINGSIZE(tx_ring),
+			&tx_ring->phys_addr);
+
+	if (addr == NULL) {
+		dev_err(&pdev->dev, "failed to allocate tx desc ring\n");
+		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,
+				"failed to allocate rds ring [%d]\n", ring);
+			err = -ENOMEM;
+			goto err_out_free;
+		}
+		rds_ring->desc_head = (struct rcv_desc *)addr;
+
+	}
+
+	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,
+				"failed to allocate sds ring [%d]\n", ring);
+			err = -ENOMEM;
+			goto err_out_free;
+		}
+		sds_ring->desc_head = (struct status_desc *)addr;
+	}
+
+
+	err = qlcnic_fw_cmd_create_rx_ctx(adapter);
+	if (err)
+		goto err_out_free;
+	err = qlcnic_fw_cmd_create_tx_ctx(adapter);
+	if (err)
+		goto err_out_free;
+
+	set_bit(__QLCNIC_FW_ATTACHED, &adapter->state);
+	return 0;
+
+err_out_free:
+	qlcnic_free_hw_resources(adapter);
+	return err;
+}
+
+void qlcnic_free_hw_resources(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_recv_context *recv_ctx;
+	struct qlcnic_host_rds_ring *rds_ring;
+	struct qlcnic_host_sds_ring *sds_ring;
+	struct qlcnic_host_tx_ring *tx_ring;
+	int ring;
+
+
+	if (test_and_clear_bit(__QLCNIC_FW_ATTACHED, &adapter->state)) {
+		qlcnic_fw_cmd_destroy_rx_ctx(adapter);
+		qlcnic_fw_cmd_destroy_tx_ctx(adapter);
+
+		/* Allow dma queues to drain after context reset */
+		msleep(20);
+	}
+
+	recv_ctx = &adapter->recv_ctx;
+
+	tx_ring = adapter->tx_ring;
+	if (tx_ring->hw_consumer != NULL) {
+		pci_free_consistent(adapter->pdev,
+				sizeof(u32),
+				tx_ring->hw_consumer,
+				tx_ring->hw_cons_phys_addr);
+		tx_ring->hw_consumer = NULL;
+	}
+
+	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;
+		}
+	}
+}
+