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>

1 files changed, 1466 insertions, 0 deletions

diff --git a/drivers/net/qlcnic/qlcnic_init.c b/drivers/net/qlcnic/qlcnic_init.c
new file mode 100644
index 00000000000..7ae8bcc1e43
--- /dev/null
+++ b/drivers/net/qlcnic/qlcnic_init.c
@@ -0,0 +1,1466 @@
+/*
+ * 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 <linux/netdevice.h>
+#include <linux/delay.h>
+#include "qlcnic.h"
+
+struct crb_addr_pair {
+	u32 addr;
+	u32 data;
+};
+
+#define QLCNIC_MAX_CRB_XFORM 60
+static unsigned int crb_addr_xform[QLCNIC_MAX_CRB_XFORM];
+
+#define crb_addr_transform(name) \
+	(crb_addr_xform[QLCNIC_HW_PX_MAP_CRB_##name] = \
+	QLCNIC_HW_CRB_HUB_AGT_ADR_##name << 20)
+
+#define QLCNIC_ADDR_ERROR (0xffffffff)
+
+static void
+qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
+		struct qlcnic_host_rds_ring *rds_ring);
+
+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);
+	crb_addr_transform(SMB);
+	crb_addr_transform(OCM0);
+	crb_addr_transform(I2C0);
+}
+
+void qlcnic_release_rx_buffers(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_recv_context *recv_ctx;
+	struct qlcnic_host_rds_ring *rds_ring;
+	struct qlcnic_rx_buffer *rx_buf;
+	int i, ring;
+
+	recv_ctx = &adapter->recv_ctx;
+	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
+		rds_ring = &recv_ctx->rds_rings[ring];
+		for (i = 0; i < rds_ring->num_desc; ++i) {
+			rx_buf = &(rds_ring->rx_buf_arr[i]);
+			if (rx_buf->state == QLCNIC_BUFFER_FREE)
+				continue;
+			pci_unmap_single(adapter->pdev,
+					rx_buf->dma,
+					rds_ring->dma_size,
+					PCI_DMA_FROMDEVICE);
+			if (rx_buf->skb != NULL)
+				dev_kfree_skb_any(rx_buf->skb);
+		}
+	}
+}
+
+void qlcnic_release_tx_buffers(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_cmd_buffer *cmd_buf;
+	struct qlcnic_skb_frag *buffrag;
+	int i, j;
+	struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
+
+	cmd_buf = tx_ring->cmd_buf_arr;
+	for (i = 0; i < tx_ring->num_desc; i++) {
+		buffrag = cmd_buf->frag_array;
+		if (buffrag->dma) {
+			pci_unmap_single(adapter->pdev, buffrag->dma,
+					 buffrag->length, PCI_DMA_TODEVICE);
+			buffrag->dma = 0ULL;
+		}
+		for (j = 0; j < cmd_buf->frag_count; j++) {
+			buffrag++;
+			if (buffrag->dma) {
+				pci_unmap_page(adapter->pdev, buffrag->dma,
+					       buffrag->length,
+					       PCI_DMA_TODEVICE);
+				buffrag->dma = 0ULL;
+			}
+		}
+		if (cmd_buf->skb) {
+			dev_kfree_skb_any(cmd_buf->skb);
+			cmd_buf->skb = NULL;
+		}
+		cmd_buf++;
+	}
+}
+
+void qlcnic_free_sw_resources(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_recv_context *recv_ctx;
+	struct qlcnic_host_rds_ring *rds_ring;
+	struct qlcnic_host_tx_ring *tx_ring;
+	int ring;
+
+	recv_ctx = &adapter->recv_ctx;
+
+	if (recv_ctx->rds_rings == NULL)
+		goto skip_rds;
+
+	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
+		rds_ring = &recv_ctx->rds_rings[ring];
+		vfree(rds_ring->rx_buf_arr);
+		rds_ring->rx_buf_arr = NULL;
+	}
+	kfree(recv_ctx->rds_rings);
+
+skip_rds:
+	if (adapter->tx_ring == NULL)
+		return;
+
+	tx_ring = adapter->tx_ring;
+	vfree(tx_ring->cmd_buf_arr);
+	kfree(adapter->tx_ring);
+}
+
+int qlcnic_alloc_sw_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;
+	struct qlcnic_rx_buffer *rx_buf;
+	int ring, i, size;
+
+	struct qlcnic_cmd_buffer *cmd_buf_arr;
+	struct net_device *netdev = adapter->netdev;
+
+	size = sizeof(struct qlcnic_host_tx_ring);
+	tx_ring = kzalloc(size, GFP_KERNEL);
+	if (tx_ring == NULL) {
+		dev_err(&netdev->dev, "failed to allocate tx ring struct\n");
+		return -ENOMEM;
+	}
+	adapter->tx_ring = tx_ring;
+
+	tx_ring->num_desc = adapter->num_txd;
+	tx_ring->txq = netdev_get_tx_queue(netdev, 0);
+
+	cmd_buf_arr = vmalloc(TX_BUFF_RINGSIZE(tx_ring));
+	if (cmd_buf_arr == NULL) {
+		dev_err(&netdev->dev, "failed to allocate cmd buffer ring\n");
+		return -ENOMEM;
+	}
+	memset(cmd_buf_arr, 0, TX_BUFF_RINGSIZE(tx_ring));
+	tx_ring->cmd_buf_arr = cmd_buf_arr;
+
+	recv_ctx = &adapter->recv_ctx;
+
+	size = adapter->max_rds_rings * sizeof(struct qlcnic_host_rds_ring);
+	rds_ring = kzalloc(size, GFP_KERNEL);
+	if (rds_ring == NULL) {
+		dev_err(&netdev->dev, "failed to allocate rds ring struct\n");
+		return -ENOMEM;
+	}
+	recv_ctx->rds_rings = rds_ring;
+
+	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
+		rds_ring = &recv_ctx->rds_rings[ring];
+		switch (ring) {
+		case RCV_RING_NORMAL:
+			rds_ring->num_desc = adapter->num_rxd;
+			if (adapter->ahw.cut_through) {
+				rds_ring->dma_size =
+					QLCNIC_CT_DEFAULT_RX_BUF_LEN;
+				rds_ring->skb_size =
+					QLCNIC_CT_DEFAULT_RX_BUF_LEN;
+			} else {
+				rds_ring->dma_size =
+					QLCNIC_P3_RX_BUF_MAX_LEN;
+				rds_ring->skb_size =
+					rds_ring->dma_size + NET_IP_ALIGN;
+			}
+			break;
+
+		case RCV_RING_JUMBO:
+			rds_ring->num_desc = adapter->num_jumbo_rxd;
+			rds_ring->dma_size =
+				QLCNIC_P3_RX_JUMBO_BUF_MAX_LEN;
+
+			if (adapter->capabilities & QLCNIC_FW_CAPABILITY_HW_LRO)
+				rds_ring->dma_size += QLCNIC_LRO_BUFFER_EXTRA;
+
+			rds_ring->skb_size =
+				rds_ring->dma_size + NET_IP_ALIGN;
+			break;
+
+		case RCV_RING_LRO:
+			rds_ring->num_desc = adapter->num_lro_rxd;
+			rds_ring->dma_size = QLCNIC_RX_LRO_BUFFER_LENGTH;
+			rds_ring->skb_size = rds_ring->dma_size + NET_IP_ALIGN;
+			break;
+
+		}
+		rds_ring->rx_buf_arr = (struct qlcnic_rx_buffer *)
+			vmalloc(RCV_BUFF_RINGSIZE(rds_ring));
+		if (rds_ring->rx_buf_arr == NULL) {
+			dev_err(&netdev->dev, "Failed to allocate "
+				"rx buffer ring %d\n", ring);
+			goto err_out;
+		}
+		memset(rds_ring->rx_buf_arr, 0, RCV_BUFF_RINGSIZE(rds_ring));
+		INIT_LIST_HEAD(&rds_ring->free_list);
+		/*
+		 * Now go through all of them, set reference handles
+		 * and put them in the queues.
+		 */
+		rx_buf = rds_ring->rx_buf_arr;
+		for (i = 0; i < rds_ring->num_desc; i++) {
+			list_add_tail(&rx_buf->list,
+					&rds_ring->free_list);
+			rx_buf->ref_handle = i;
+			rx_buf->state = QLCNIC_BUFFER_FREE;
+			rx_buf++;
+		}
+		spin_lock_init(&rds_ring->lock);
+	}
+
+	for (ring = 0; ring < adapter->max_sds_rings; ring++) {
+		sds_ring = &recv_ctx->sds_rings[ring];
+		sds_ring->irq = adapter->msix_entries[ring].vector;
+		sds_ring->adapter = adapter;
+		sds_ring->num_desc = adapter->num_rxd;
+
+		for (i = 0; i < NUM_RCV_DESC_RINGS; i++)
+			INIT_LIST_HEAD(&sds_ring->free_list[i]);
+	}
+
+	return 0;
+
+err_out:
+	qlcnic_free_sw_resources(adapter);
+	return -ENOMEM;
+}
+
+/*
+ * Utility to translate from internal Phantom CRB address
+ * to external PCI CRB address.
+ */
+static u32 qlcnic_decode_crb_addr(u32 addr)
+{
+	int i;
+	u32 base_addr, offset, pci_base;
+
+	crb_addr_transform_setup();
+
+	pci_base = QLCNIC_ADDR_ERROR;
+	base_addr = addr & 0xfff00000;
+	offset = addr & 0x000fffff;
+
+	for (i = 0; i < QLCNIC_MAX_CRB_XFORM; i++) {
+		if (crb_addr_xform[i] == base_addr) {
+			pci_base = i << 20;
+			break;
+		}
+	}
+	if (pci_base == QLCNIC_ADDR_ERROR)
+		return pci_base;
+	else
+		return pci_base + offset;
+}
+
+#define QLCNIC_MAX_ROM_WAIT_USEC	100
+
+static int qlcnic_wait_rom_done(struct qlcnic_adapter *adapter)
+{
+	long timeout = 0;
+	long done = 0;
+
+	cond_resched();
+
+	while (done == 0) {
+		done = QLCRD32(adapter, QLCNIC_ROMUSB_GLB_STATUS);
+		done &= 2;
+		if (++timeout >= QLCNIC_MAX_ROM_WAIT_USEC) {
+			dev_err(&adapter->pdev->dev,
+				"Timeout reached  waiting for rom done");
+			return -EIO;
+		}
+		udelay(1);
+	}
+	return 0;
+}
+
+static int do_rom_fast_read(struct qlcnic_adapter *adapter,
+			    int addr, int *valp)
+{
+	QLCWR32(adapter, QLCNIC_ROMUSB_ROM_ADDRESS, addr);
+	QLCWR32(adapter, QLCNIC_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
+	QLCWR32(adapter, QLCNIC_ROMUSB_ROM_ABYTE_CNT, 3);
+	QLCWR32(adapter, QLCNIC_ROMUSB_ROM_INSTR_OPCODE, 0xb);
+	if (qlcnic_wait_rom_done(adapter)) {
+		dev_err(&adapter->pdev->dev, "Error waiting for rom done\n");
+		return -EIO;
+	}
+	/* reset abyte_cnt and dummy_byte_cnt */
+	QLCWR32(adapter, QLCNIC_ROMUSB_ROM_ABYTE_CNT, 0);
+	udelay(10);
+	QLCWR32(adapter, QLCNIC_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
+
+	*valp = QLCRD32(adapter, QLCNIC_ROMUSB_ROM_RDATA);
+	return 0;
+}
+
+static int do_rom_fast_read_words(struct qlcnic_adapter *adapter, int addr,
+				  u8 *bytes, size_t size)
+{
+	int addridx;
+	int ret = 0;
+
+	for (addridx = addr; addridx < (addr + size); addridx += 4) {
+		int v;
+		ret = do_rom_fast_read(adapter, addridx, &v);
+		if (ret != 0)
+			break;
+		*(__le32 *)bytes = cpu_to_le32(v);
+		bytes += 4;
+	}
+
+	return ret;
+}
+
+int
+qlcnic_rom_fast_read_words(struct qlcnic_adapter *adapter, int addr,
+				u8 *bytes, size_t size)
+{
+	int ret;
+
+	ret = qlcnic_rom_lock(adapter);
+	if (ret < 0)
+		return ret;
+
+	ret = do_rom_fast_read_words(adapter, addr, bytes, size);
+
+	qlcnic_rom_unlock(adapter);
+	return ret;
+}
+
+int qlcnic_rom_fast_read(struct qlcnic_adapter *adapter, int addr, int *valp)
+{
+	int ret;
+
+	if (qlcnic_rom_lock(adapter) != 0)
+		return -EIO;
+
+	ret = do_rom_fast_read(adapter, addr, valp);
+	qlcnic_rom_unlock(adapter);
+	return ret;
+}
+
+int qlcnic_pinit_from_rom(struct qlcnic_adapter *adapter)
+{
+	int addr, val;
+	int i, n, init_delay;
+	struct crb_addr_pair *buf;
+	unsigned offset;
+	u32 off;
+	struct pci_dev *pdev = adapter->pdev;
+
+	/* resetall */
+	qlcnic_rom_lock(adapter);
+	QLCWR32(adapter, QLCNIC_ROMUSB_GLB_SW_RESET, 0xffffffff);
+	qlcnic_rom_unlock(adapter);
+
+	if (qlcnic_rom_fast_read(adapter, 0, &n) != 0 || (n != 0xcafecafe) ||
+			qlcnic_rom_fast_read(adapter, 4, &n) != 0) {
+		dev_err(&pdev->dev, "ERROR Reading crb_init area: val:%x\n", n);
+		return -EIO;
+	}
+	offset = n & 0xffffU;
+	n = (n >> 16) & 0xffffU;
+
+	if (n >= 1024) {
+		dev_err(&pdev->dev, "QLOGIC card flash not initialized.\n");
+		return -EIO;
+	}
+
+	buf = kcalloc(n, sizeof(struct crb_addr_pair), GFP_KERNEL);
+	if (buf == NULL) {
+		dev_err(&pdev->dev, "Unable to calloc memory for rom read.\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < n; i++) {
+		if (qlcnic_rom_fast_read(adapter, 8*i + 4*offset, &val) != 0 ||
+		qlcnic_rom_fast_read(adapter, 8*i + 4*offset + 4, &addr) != 0) {
+			kfree(buf);
+			return -EIO;
+		}
+
+		buf[i].addr = addr;
+		buf[i].data = val;
+	}
+
+	for (i = 0; i < n; i++) {
+
+		off = qlcnic_decode_crb_addr(buf[i].addr);
+		if (off == QLCNIC_ADDR_ERROR) {
+			dev_err(&pdev->dev, "CRB init value out of range %x\n",
+					buf[i].addr);
+			continue;
+		}
+		off += QLCNIC_PCI_CRBSPACE;
+
+		if (off & 1)
+			continue;
+
+		/* skipping cold reboot MAGIC */
+		if (off == QLCNIC_CAM_RAM(0x1fc))
+			continue;
+		if (off == (QLCNIC_CRB_I2C0 + 0x1c))
+			continue;
+		if (off == (ROMUSB_GLB + 0xbc)) /* do not reset PCI */
+			continue;
+		if (off == (ROMUSB_GLB + 0xa8))
+			continue;
+		if (off == (ROMUSB_GLB + 0xc8)) /* core clock */
+			continue;
+		if (off == (ROMUSB_GLB + 0x24)) /* MN clock */
+			continue;
+		if (off == (ROMUSB_GLB + 0x1c)) /* MS clock */
+			continue;
+		if ((off & 0x0ff00000) == QLCNIC_CRB_DDR_NET)
+			continue;
+		/* skip the function enable register */
+		if (off == QLCNIC_PCIE_REG(PCIE_SETUP_FUNCTION))
+			continue;
+		if (off == QLCNIC_PCIE_REG(PCIE_SETUP_FUNCTION2))
+			continue;
+		if ((off & 0x0ff00000) == QLCNIC_CRB_SMB)
+			continue;
+
+		init_delay = 1;
+		/* After writing this register, HW needs time for CRB */
+		/* to quiet down (else crb_window returns 0xffffffff) */
+		if (off == QLCNIC_ROMUSB_GLB_SW_RESET)
+			init_delay = 1000;
+
+		QLCWR32(adapter, off, buf[i].data);
+
+		msleep(init_delay);
+	}
+	kfree(buf);
+
+	/* p2dn replyCount */
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_D + 0xec, 0x1e);
+	/* disable_peg_cache 0 & 1*/
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_D + 0x4c, 8);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_I + 0x4c, 8);
+
+	/* peg_clr_all */
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_0 + 0x8, 0);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_0 + 0xc, 0);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_1 + 0x8, 0);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_1 + 0xc, 0);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_2 + 0x8, 0);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_2 + 0xc, 0);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_3 + 0x8, 0);
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_3 + 0xc, 0);
+	return 0;
+}
+
+static int
+qlcnic_has_mn(struct qlcnic_adapter *adapter)
+{
+	u32 capability, flashed_ver;
+	capability = 0;
+
+	qlcnic_rom_fast_read(adapter,
+			QLCNIC_FW_VERSION_OFFSET, (int *)&flashed_ver);
+	flashed_ver = QLCNIC_DECODE_VERSION(flashed_ver);
+
+	if (flashed_ver >= QLCNIC_VERSION_CODE(4, 0, 220)) {
+
+		capability = QLCRD32(adapter, QLCNIC_PEG_TUNE_CAPABILITY);
+		if (capability & QLCNIC_PEG_TUNE_MN_PRESENT)
+			return 1;
+	}
+	return 0;
+}
+
+static
+struct uni_table_desc *qlcnic_get_table_desc(const u8 *unirom, int section)
+{
+	u32 i;
+	struct uni_table_desc *directory = (struct uni_table_desc *) &unirom[0];
+	__le32 entries = cpu_to_le32(directory->num_entries);
+
+	for (i = 0; i < entries; i++) {
+
+		__le32 offs = cpu_to_le32(directory->findex) +
+				(i * cpu_to_le32(directory->entry_size));
+		__le32 tab_type = cpu_to_le32(*((u32 *)&unirom[offs] + 8));
+
+		if (tab_type == section)
+			return (struct uni_table_desc *) &unirom[offs];
+	}
+
+	return NULL;
+}
+
+static int
+qlcnic_set_product_offs(struct qlcnic_adapter *adapter)
+{
+	struct uni_table_desc *ptab_descr;
+	const u8 *unirom = adapter->fw->data;
+	u32 i;
+	__le32 entries;
+	int mn_present = qlcnic_has_mn(adapter);
+
+	ptab_descr = qlcnic_get_table_desc(unirom,
+				QLCNIC_UNI_DIR_SECT_PRODUCT_TBL);
+	if (ptab_descr == NULL)
+		return -1;
+
+	entries = cpu_to_le32(ptab_descr->num_entries);
+nomn:
+	for (i = 0; i < entries; i++) {
+
+		__le32 flags, file_chiprev, offs;
+		u8 chiprev = adapter->ahw.revision_id;
+		u32 flagbit;
+
+		offs = cpu_to_le32(ptab_descr->findex) +
+				(i * cpu_to_le32(ptab_descr->entry_size));
+		flags = cpu_to_le32(*((int *)&unirom[offs] +
+						QLCNIC_UNI_FLAGS_OFF));
+		file_chiprev = cpu_to_le32(*((int *)&unirom[offs] +
+						QLCNIC_UNI_CHIP_REV_OFF));
+
+		flagbit = mn_present ? 1 : 2;
+
+		if ((chiprev == file_chiprev) &&
+					((1ULL << flagbit) & flags)) {
+			adapter->file_prd_off = offs;
+			return 0;
+		}
+	}
+	if (mn_present) {
+		mn_present = 0;
+		goto nomn;
+	}
+	return -1;
+}
+
+static
+struct uni_data_desc *qlcnic_get_data_desc(struct qlcnic_adapter *adapter,
+			u32 section, u32 idx_offset)
+{
+	const u8 *unirom = adapter->fw->data;
+	int idx = cpu_to_le32(*((int *)&unirom[adapter->file_prd_off] +
+								idx_offset));
+	struct uni_table_desc *tab_desc;
+	__le32 offs;
+
+	tab_desc = qlcnic_get_table_desc(unirom, section);
+
+	if (tab_desc == NULL)
+		return NULL;
+
+	offs = cpu_to_le32(tab_desc->findex) +
+			(cpu_to_le32(tab_desc->entry_size) * idx);
+
+	return (struct uni_data_desc *)&unirom[offs];
+}
+
+static u8 *
+qlcnic_get_bootld_offs(struct qlcnic_adapter *adapter)
+{
+	u32 offs = QLCNIC_BOOTLD_START;
+
+	if (adapter->fw_type == QLCNIC_UNIFIED_ROMIMAGE)
+		offs = cpu_to_le32((qlcnic_get_data_desc(adapter,
+					QLCNIC_UNI_DIR_SECT_BOOTLD,
+					QLCNIC_UNI_BOOTLD_IDX_OFF))->findex);
+
+	return (u8 *)&adapter->fw->data[offs];
+}
+
+static u8 *
+qlcnic_get_fw_offs(struct qlcnic_adapter *adapter)
+{
+	u32 offs = QLCNIC_IMAGE_START;
+
+	if (adapter->fw_type == QLCNIC_UNIFIED_ROMIMAGE)
+		offs = cpu_to_le32((qlcnic_get_data_desc(adapter,
+					QLCNIC_UNI_DIR_SECT_FW,
+					QLCNIC_UNI_FIRMWARE_IDX_OFF))->findex);
+
+	return (u8 *)&adapter->fw->data[offs];
+}
+
+static __le32
+qlcnic_get_fw_size(struct qlcnic_adapter *adapter)
+{
+	if (adapter->fw_type == QLCNIC_UNIFIED_ROMIMAGE)
+		return cpu_to_le32((qlcnic_get_data_desc(adapter,
+					QLCNIC_UNI_DIR_SECT_FW,
+					QLCNIC_UNI_FIRMWARE_IDX_OFF))->size);
+	else
+		return cpu_to_le32(
+			*(u32 *)&adapter->fw->data[QLCNIC_FW_SIZE_OFFSET]);
+}
+
+static __le32
+qlcnic_get_fw_version(struct qlcnic_adapter *adapter)
+{
+	struct uni_data_desc *fw_data_desc;
+	const struct firmware *fw = adapter->fw;
+	__le32 major, minor, sub;
+	const u8 *ver_str;
+	int i, ret;
+
+	if (adapter->fw_type != QLCNIC_UNIFIED_ROMIMAGE)
+		return cpu_to_le32(*(u32 *)&fw->data[QLCNIC_FW_VERSION_OFFSET]);
+
+	fw_data_desc = qlcnic_get_data_desc(adapter, QLCNIC_UNI_DIR_SECT_FW,
+			QLCNIC_UNI_FIRMWARE_IDX_OFF);
+	ver_str = fw->data + cpu_to_le32(fw_data_desc->findex) +
+		cpu_to_le32(fw_data_desc->size) - 17;
+
+	for (i = 0; i < 12; i++) {
+		if (!strncmp(&ver_str[i], "REV=", 4)) {
+			ret = sscanf(&ver_str[i+4], "%u.%u.%u ",
+					&major, &minor, &sub);
+			if (ret != 3)
+				return 0;
+			else
+				return major + (minor << 8) + (sub << 16);
+		}
+	}
+
+	return 0;
+}
+
+static __le32
+qlcnic_get_bios_version(struct qlcnic_adapter *adapter)
+{
+	const struct firmware *fw = adapter->fw;
+	__le32 bios_ver, prd_off = adapter->file_prd_off;
+
+	if (adapter->fw_type != QLCNIC_UNIFIED_ROMIMAGE)
+		return cpu_to_le32(
+			*(u32 *)&fw->data[QLCNIC_BIOS_VERSION_OFFSET]);
+
+	bios_ver = cpu_to_le32(*((u32 *) (&fw->data[prd_off])
+				+ QLCNIC_UNI_BIOS_VERSION_OFF));
+
+	return (bios_ver << 24) + ((bios_ver >> 8) & 0xff00) + (bios_ver >> 24);
+}
+
+int
+qlcnic_need_fw_reset(struct qlcnic_adapter *adapter)
+{
+	u32 count, old_count;
+	u32 val, version, major, minor, build;
+	int i, timeout;
+
+	if (adapter->need_fw_reset)
+		return 1;
+
+	/* last attempt had failed */
+	if (QLCRD32(adapter, CRB_CMDPEG_STATE) == PHAN_INITIALIZE_FAILED)
+		return 1;
+
+	old_count = QLCRD32(adapter, QLCNIC_PEG_ALIVE_COUNTER);
+
+	for (i = 0; i < 10; i++) {
+
+		timeout = msleep_interruptible(200);
+		if (timeout) {
+			QLCWR32(adapter, CRB_CMDPEG_STATE,
+					PHAN_INITIALIZE_FAILED);
+			return -EINTR;
+		}
+
+		count = QLCRD32(adapter, QLCNIC_PEG_ALIVE_COUNTER);
+		if (count != old_count)
+			break;
+	}
+
+	/* firmware is dead */
+	if (count == old_count)
+		return 1;
+
+	/* check if we have got newer or different file firmware */
+	if (adapter->fw) {
+
+		val = qlcnic_get_fw_version(adapter);
+
+		version = QLCNIC_DECODE_VERSION(val);
+
+		major = QLCRD32(adapter, QLCNIC_FW_VERSION_MAJOR);
+		minor = QLCRD32(adapter, QLCNIC_FW_VERSION_MINOR);
+		build = QLCRD32(adapter, QLCNIC_FW_VERSION_SUB);
+
+		if (version > QLCNIC_VERSION_CODE(major, minor, build))
+			return 1;
+	}
+
+	return 0;
+}
+
+static const char *fw_name[] = {
+	QLCNIC_UNIFIED_ROMIMAGE_NAME,
+	QLCNIC_FLASH_ROMIMAGE_NAME,
+};
+
+int
+qlcnic_load_firmware(struct qlcnic_adapter *adapter)
+{
+	u64 *ptr64;
+	u32 i, flashaddr, size;
+	const struct firmware *fw = adapter->fw;
+	struct pci_dev *pdev = adapter->pdev;
+
+	dev_info(&pdev->dev, "loading firmware from %s\n",
+			fw_name[adapter->fw_type]);
+
+	if (fw) {
+		__le64 data;
+
+		size = (QLCNIC_IMAGE_START - QLCNIC_BOOTLD_START) / 8;
+
+		ptr64 = (u64 *)qlcnic_get_bootld_offs(adapter);
+		flashaddr = QLCNIC_BOOTLD_START;
+
+		for (i = 0; i < size; i++) {
+			data = cpu_to_le64(ptr64[i]);
+
+			if (qlcnic_pci_mem_write_2M(adapter, flashaddr, data))
+				return -EIO;
+
+			flashaddr += 8;
+		}
+
+		size = (__force u32)qlcnic_get_fw_size(adapter) / 8;
+
+		ptr64 = (u64 *)qlcnic_get_fw_offs(adapter);
+		flashaddr = QLCNIC_IMAGE_START;
+
+		for (i = 0; i < size; i++) {
+			data = cpu_to_le64(ptr64[i]);
+
+			if (qlcnic_pci_mem_write_2M(adapter,
+						flashaddr, data))
+				return -EIO;
+
+			flashaddr += 8;
+		}
+	} else {
+		u64 data;
+		u32 hi, lo;
+
+		size = (QLCNIC_IMAGE_START - QLCNIC_BOOTLD_START) / 8;
+		flashaddr = QLCNIC_BOOTLD_START;
+
+		for (i = 0; i < size; i++) {
+			if (qlcnic_rom_fast_read(adapter,
+					flashaddr, (int *)&lo) != 0)
+				return -EIO;
+			if (qlcnic_rom_fast_read(adapter,
+					flashaddr + 4, (int *)&hi) != 0)
+				return -EIO;
+
+			data = (((u64)hi << 32) | lo);
+
+			if (qlcnic_pci_mem_write_2M(adapter,
+						flashaddr, data))
+				return -EIO;
+
+			flashaddr += 8;
+		}
+	}
+	msleep(1);
+
+	QLCWR32(adapter, QLCNIC_CRB_PEG_NET_0 + 0x18, 0x1020);
+	QLCWR32(adapter, QLCNIC_ROMUSB_GLB_SW_RESET, 0x80001e);
+	return 0;
+}
+
+static int
+qlcnic_validate_firmware(struct qlcnic_adapter *adapter)
+{
+	__le32 val;
+	u32 ver, min_ver, bios, min_size;
+	struct pci_dev *pdev = adapter->pdev;
+	const struct firmware *fw = adapter->fw;
+	u8 fw_type = adapter->fw_type;
+
+	if (fw_type == QLCNIC_UNIFIED_ROMIMAGE) {
+		if (qlcnic_set_product_offs(adapter))
+			return -EINVAL;
+
+		min_size = QLCNIC_UNI_FW_MIN_SIZE;
+	} else {
+		val = cpu_to_le32(*(u32 *)&fw->data[QLCNIC_FW_MAGIC_OFFSET]);
+		if ((__force u32)val != QLCNIC_BDINFO_MAGIC)
+			return -EINVAL;
+
+		min_size = QLCNIC_FW_MIN_SIZE;
+	}
+
+	if (fw->size < min_size)
+		return -EINVAL;
+
+	val = qlcnic_get_fw_version(adapter);
+
+	min_ver = QLCNIC_VERSION_CODE(4, 0, 216);
+
+	ver = QLCNIC_DECODE_VERSION(val);
+
+	if ((_major(ver) > _QLCNIC_LINUX_MAJOR) || (ver < min_ver)) {
+		dev_err(&pdev->dev,
+				"%s: firmware version %d.%d.%d unsupported\n",
+		fw_name[fw_type], _major(ver), _minor(ver), _build(ver));
+		return -EINVAL;
+	}
+
+	val = qlcnic_get_bios_version(adapter);
+	qlcnic_rom_fast_read(adapter, QLCNIC_BIOS_VERSION_OFFSET, (int *)&bios);
+	if ((__force u32)val != bios) {
+		dev_err(&pdev->dev, "%s: firmware bios is incompatible\n",
+				fw_name[fw_type]);
+		return -EINVAL;
+	}
+
+	/* check if flashed firmware is newer */
+	if (qlcnic_rom_fast_read(adapter,
+			QLCNIC_FW_VERSION_OFFSET, (int *)&val))
+		return -EIO;
+
+	val = QLCNIC_DECODE_VERSION(val);
+	if (val > ver) {
+		dev_info(&pdev->dev, "%s: firmware is older than flash\n",
+				fw_name[fw_type]);
+		return -EINVAL;
+	}
+
+	QLCWR32(adapter, QLCNIC_CAM_RAM(0x1fc), QLCNIC_BDINFO_MAGIC);
+	return 0;
+}
+
+static void
+qlcnic_get_next_fwtype(struct qlcnic_adapter *adapter)
+{
+	u8 fw_type;
+
+	switch (adapter->fw_type) {
+	case QLCNIC_UNKNOWN_ROMIMAGE:
+		fw_type = QLCNIC_UNIFIED_ROMIMAGE;
+		break;
+
+	case QLCNIC_UNIFIED_ROMIMAGE:
+	default:
+		fw_type = QLCNIC_FLASH_ROMIMAGE;
+		break;
+	}
+
+	adapter->fw_type = fw_type;
+}
+
+
+
+void qlcnic_request_firmware(struct qlcnic_adapter *adapter)
+{
+	struct pci_dev *pdev = adapter->pdev;
+	int rc;
+
+	adapter->fw_type = QLCNIC_UNKNOWN_ROMIMAGE;
+
+next:
+	qlcnic_get_next_fwtype(adapter);
+
+	if (adapter->fw_type == QLCNIC_FLASH_ROMIMAGE) {
+		adapter->fw = NULL;
+	} else {
+		rc = request_firmware(&adapter->fw,
+				fw_name[adapter->fw_type], &pdev->dev);
+		if (rc != 0)
+			goto next;
+
+		rc = qlcnic_validate_firmware(adapter);
+		if (rc != 0) {
+			release_firmware(adapter->fw);
+			msleep(1);
+			goto next;
+		}
+	}
+}
+
+
+void
+qlcnic_release_firmware(struct qlcnic_adapter *adapter)
+{
+	if (adapter->fw)
+		release_firmware(adapter->fw);
+	adapter->fw = NULL;
+}
+
+int qlcnic_phantom_init(struct qlcnic_adapter *adapter)
+{
+	u32 val;
+	int retries = 60;
+
+	do {
+		val = QLCRD32(adapter, CRB_CMDPEG_STATE);
+
+		switch (val) {
+		case PHAN_INITIALIZE_COMPLETE:
+		case PHAN_INITIALIZE_ACK:
+			return 0;
+		case PHAN_INITIALIZE_FAILED:
+			goto out_err;
+		default:
+			break;
+		}
+
+		msleep(500);
+
+	} while (--retries);
+
+	QLCWR32(adapter, CRB_CMDPEG_STATE, PHAN_INITIALIZE_FAILED);
+
+out_err:
+	dev_err(&adapter->pdev->dev, "firmware init failed\n");
+	return -EIO;
+}
+
+static int
+qlcnic_receive_peg_ready(struct qlcnic_adapter *adapter)
+{
+	u32 val;
+	int retries = 2000;
+
+	do {
+		val = QLCRD32(adapter, CRB_RCVPEG_STATE);
+
+		if (val == PHAN_PEG_RCV_INITIALIZED)
+			return 0;
+
+		msleep(10);
+
+	} while (--retries);
+
+	if (!retries) {
+		dev_err(&adapter->pdev->dev, "Receive Peg initialization not "
+			      "complete, state: 0x%x.\n", val);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+int qlcnic_init_firmware(struct qlcnic_adapter *adapter)
+{
+	int err;
+
+	err = qlcnic_receive_peg_ready(adapter);
+	if (err)
+		return err;
+
+	QLCWR32(adapter, CRB_NIC_CAPABILITIES_HOST, INTR_SCHEME_PERPORT);
+	QLCWR32(adapter, CRB_NIC_MSI_MODE_HOST, MSI_MODE_MULTIFUNC);
+	QLCWR32(adapter, CRB_MPORT_MODE, MPORT_MULTI_FUNCTION_MODE);
+	QLCWR32(adapter, CRB_CMDPEG_STATE, PHAN_INITIALIZE_ACK);
+
+	return err;
+}
+
+static void
+qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
+				struct qlcnic_fw_msg *msg)
+{
+	u32 cable_OUI;
+	u16 cable_len;
+	u16 link_speed;
+	u8  link_status, module, duplex, autoneg;
+	struct net_device *netdev = adapter->netdev;
+
+	adapter->has_link_events = 1;
+
+	cable_OUI = msg->body[1] & 0xffffffff;
+	cable_len = (msg->body[1] >> 32) & 0xffff;
+	link_speed = (msg->body[1] >> 48) & 0xffff;
+
+	link_status = msg->body[2] & 0xff;
+	duplex = (msg->body[2] >> 16) & 0xff;
+	autoneg = (msg->body[2] >> 24) & 0xff;
+
+	module = (msg->body[2] >> 8) & 0xff;
+	if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
+		dev_info(&netdev->dev, "unsupported cable: OUI 0x%x, "
+				"length %d\n", cable_OUI, cable_len);
+	else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
+		dev_info(&netdev->dev, "unsupported cable length %d\n",
+				cable_len);
+
+	qlcnic_advert_link_change(adapter, link_status);
+
+	if (duplex == LINKEVENT_FULL_DUPLEX)
+		adapter->link_duplex = DUPLEX_FULL;
+	else
+		adapter->link_duplex = DUPLEX_HALF;
+
+	adapter->module_type = module;
+	adapter->link_autoneg = autoneg;
+	adapter->link_speed = link_speed;
+}
+
+static void
+qlcnic_handle_fw_message(int desc_cnt, int index,
+		struct qlcnic_host_sds_ring *sds_ring)
+{
+	struct qlcnic_fw_msg msg;
+	struct status_desc *desc;
+	int i = 0, opcode;
+
+	while (desc_cnt > 0 && i < 8) {
+		desc = &sds_ring->desc_head[index];
+		msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
+		msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
+
+		index = get_next_index(index, sds_ring->num_desc);
+		desc_cnt--;
+	}
+
+	opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
+	switch (opcode) {
+	case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
+		qlcnic_handle_linkevent(sds_ring->adapter, &msg);
+		break;
+	default:
+		break;
+	}
+}
+
+static int
+qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
+		struct qlcnic_host_rds_ring *rds_ring,
+		struct qlcnic_rx_buffer *buffer)
+{
+	struct sk_buff *skb;
+	dma_addr_t dma;
+	struct pci_dev *pdev = adapter->pdev;
+
+	buffer->skb = dev_alloc_skb(rds_ring->skb_size);
+	if (!buffer->skb)
+		return -ENOMEM;
+
+	skb = buffer->skb;
+
+	if (!adapter->ahw.cut_through)
+		skb_reserve(skb, 2);
+
+	dma = pci_map_single(pdev, skb->data,
+			rds_ring->dma_size, PCI_DMA_FROMDEVICE);
+
+	if (pci_dma_mapping_error(pdev, dma)) {
+		dev_kfree_skb_any(skb);
+		buffer->skb = NULL;
+		return -ENOMEM;
+	}
+
+	buffer->skb = skb;
+	buffer->dma = dma;
+	buffer->state = QLCNIC_BUFFER_BUSY;
+
+	return 0;
+}
+
+static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
+		struct qlcnic_host_rds_ring *rds_ring, u16 index, u16 cksum)
+{
+	struct qlcnic_rx_buffer *buffer;
+	struct sk_buff *skb;
+
+	buffer = &rds_ring->rx_buf_arr[index];
+
+	pci_unmap_single(adapter->pdev, buffer->dma, rds_ring->dma_size,
+			PCI_DMA_FROMDEVICE);
+
+	skb = buffer->skb;
+	if (!skb)
+		goto no_skb;
+
+	if (likely(adapter->rx_csum && cksum == STATUS_CKSUM_OK)) {
+		adapter->stats.csummed++;
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+	} else {
+		skb->ip_summed = CHECKSUM_NONE;
+	}
+
+	skb->dev = adapter->netdev;
+
+	buffer->skb = NULL;
+no_skb:
+	buffer->state = QLCNIC_BUFFER_FREE;
+	return skb;
+}
+
+static struct qlcnic_rx_buffer *
+qlcnic_process_rcv(struct qlcnic_adapter *adapter,
+		struct qlcnic_host_sds_ring *sds_ring,
+		int ring, u64 sts_data0)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct qlcnic_recv_context *recv_ctx = &adapter->recv_ctx;
+	struct qlcnic_rx_buffer *buffer;
+	struct sk_buff *skb;
+	struct qlcnic_host_rds_ring *rds_ring;
+	int index, length, cksum, pkt_offset;
+
+	if (unlikely(ring >= adapter->max_rds_rings))
+		return NULL;
+
+	rds_ring = &recv_ctx->rds_rings[ring];
+
+	index = qlcnic_get_sts_refhandle(sts_data0);
+	if (unlikely(index >= rds_ring->num_desc))
+		return NULL;
+
+	buffer = &rds_ring->rx_buf_arr[index];
+
+	length = qlcnic_get_sts_totallength(sts_data0);
+	cksum  = qlcnic_get_sts_status(sts_data0);
+	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
+
+	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
+	if (!skb)
+		return buffer;
+
+	if (length > rds_ring->skb_size)
+		skb_put(skb, rds_ring->skb_size);
+	else
+		skb_put(skb, length);
+
+	if (pkt_offset)
+		skb_pull(skb, pkt_offset);
+
+	skb->truesize = skb->len + sizeof(struct sk_buff);
+	skb->protocol = eth_type_trans(skb, netdev);
+
+	napi_gro_receive(&sds_ring->napi, skb);
+
+	adapter->stats.rx_pkts++;
+	adapter->stats.rxbytes += length;
+
+	return buffer;
+}
+
+#define QLC_TCP_HDR_SIZE            20
+#define QLC_TCP_TS_OPTION_SIZE      12
+#define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
+
+static struct qlcnic_rx_buffer *
+qlcnic_process_lro(struct qlcnic_adapter *adapter,
+		struct qlcnic_host_sds_ring *sds_ring,
+		int ring, u64 sts_data0, u64 sts_data1)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct qlcnic_recv_context *recv_ctx = &adapter->recv_ctx;
+	struct qlcnic_rx_buffer *buffer;
+	struct sk_buff *skb;
+	struct qlcnic_host_rds_ring *rds_ring;
+	struct iphdr *iph;
+	struct tcphdr *th;
+	bool push, timestamp;
+	int l2_hdr_offset, l4_hdr_offset;
+	int index;
+	u16 lro_length, length, data_offset;
+	u32 seq_number;
+
+	if (unlikely(ring > adapter->max_rds_rings))
+		return NULL;
+
+	rds_ring = &recv_ctx->rds_rings[ring];
+
+	index = qlcnic_get_lro_sts_refhandle(sts_data0);
+	if (unlikely(index > rds_ring->num_desc))
+		return NULL;
+
+	buffer = &rds_ring->rx_buf_arr[index];
+
+	timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
+	lro_length = qlcnic_get_lro_sts_length(sts_data0);
+	l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
+	l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
+	push = qlcnic_get_lro_sts_push_flag(sts_data0);
+	seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
+
+	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
+	if (!skb)
+		return buffer;
+
+	if (timestamp)
+		data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
+	else
+		data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
+
+	skb_put(skb, lro_length + data_offset);
+
+	skb->truesize = skb->len + sizeof(struct sk_buff) + skb_headroom(skb);
+
+	skb_pull(skb, l2_hdr_offset);
+	skb->protocol = eth_type_trans(skb, netdev);
+
+	iph = (struct iphdr *)skb->data;
+	th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
+
+	length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
+	iph->tot_len = htons(length);
+	iph->check = 0;
+	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+	th->psh = push;
+	th->seq = htonl(seq_number);
+
+	length = skb->len;
+
+	netif_receive_skb(skb);
+
+	adapter->stats.lro_pkts++;
+	adapter->stats.rxbytes += length;
+
+	return buffer;
+}
+
+int
+qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
+{
+	struct qlcnic_adapter *adapter = sds_ring->adapter;
+	struct list_head *cur;
+	struct status_desc *desc;
+	struct qlcnic_rx_buffer *rxbuf;
+	u64 sts_data0, sts_data1;
+
+	int count = 0;
+	int opcode, ring, desc_cnt;
+	u32 consumer = sds_ring->consumer;
+
+	while (count < max) {
+		desc = &sds_ring->desc_head[consumer];
+		sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
+
+		if (!(sts_data0 & STATUS_OWNER_HOST))
+			break;
+
+		desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
+		opcode = qlcnic_get_sts_opcode(sts_data0);
+
+		switch (opcode) {
+		case QLCNIC_RXPKT_DESC:
+		case QLCNIC_OLD_RXPKT_DESC:
+		case QLCNIC_SYN_OFFLOAD:
+			ring = qlcnic_get_sts_type(sts_data0);
+			rxbuf = qlcnic_process_rcv(adapter, sds_ring,
+					ring, sts_data0);
+			break;
+		case QLCNIC_LRO_DESC:
+			ring = qlcnic_get_lro_sts_type(sts_data0);
+			sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
+			rxbuf = qlcnic_process_lro(adapter, sds_ring,
+					ring, sts_data0, sts_data1);
+			break;
+		case QLCNIC_RESPONSE_DESC:
+			qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
+		default:
+			goto skip;
+		}
+
+		WARN_ON(desc_cnt > 1);
+
+		if (rxbuf)
+			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
+
+skip:
+		for (; desc_cnt > 0; desc_cnt--) {
+			desc = &sds_ring->desc_head[consumer];
+			desc->status_desc_data[0] =
+				cpu_to_le64(STATUS_OWNER_PHANTOM);
+			consumer = get_next_index(consumer, sds_ring->num_desc);
+		}
+		count++;
+	}
+
+	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
+		struct qlcnic_host_rds_ring *rds_ring =
+			&adapter->recv_ctx.rds_rings[ring];
+
+		if (!list_empty(&sds_ring->free_list[ring])) {
+			list_for_each(cur, &sds_ring->free_list[ring]) {
+				rxbuf = list_entry(cur,
+						struct qlcnic_rx_buffer, list);
+				qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
+			}
+			spin_lock(&rds_ring->lock);
+			list_splice_tail_init(&sds_ring->free_list[ring],
+						&rds_ring->free_list);
+			spin_unlock(&rds_ring->lock);
+		}
+
+		qlcnic_post_rx_buffers_nodb(adapter, rds_ring);
+	}
+
+	if (count) {
+		sds_ring->consumer = consumer;
+		writel(consumer, sds_ring->crb_sts_consumer);
+	}
+
+	return count;
+}
+
+void
+qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter, u32 ringid,
+	struct qlcnic_host_rds_ring *rds_ring)
+{
+	struct rcv_desc *pdesc;
+	struct qlcnic_rx_buffer *buffer;
+	int producer, count = 0;
+	struct list_head *head;
+
+	producer = rds_ring->producer;
+
+	spin_lock(&rds_ring->lock);
+	head = &rds_ring->free_list;
+	while (!list_empty(head)) {
+
+		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
+
+		if (!buffer->skb) {
+			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
+				break;
+		}
+
+		count++;
+		list_del(&buffer->list);
+
+		/* make a rcv descriptor  */
+		pdesc = &rds_ring->desc_head[producer];
+		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
+		pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
+		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
+
+		producer = get_next_index(producer, rds_ring->num_desc);
+	}
+	spin_unlock(&rds_ring->lock);
+
+	if (count) {
+		rds_ring->producer = producer;
+		writel((producer-1) & (rds_ring->num_desc-1),
+				rds_ring->crb_rcv_producer);
+	}
+}
+
+static void
+qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
+		struct qlcnic_host_rds_ring *rds_ring)
+{
+	struct rcv_desc *pdesc;
+	struct qlcnic_rx_buffer *buffer;
+	int producer, count = 0;
+	struct list_head *head;
+
+	producer = rds_ring->producer;
+	if (!spin_trylock(&rds_ring->lock))
+		return;
+
+	head = &rds_ring->free_list;
+	while (!list_empty(head)) {
+
+		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
+
+		if (!buffer->skb) {
+			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
+				break;
+		}
+
+		count++;
+		list_del(&buffer->list);
+
+		/* make a rcv descriptor  */
+		pdesc = &rds_ring->desc_head[producer];
+		pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
+		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
+		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
+
+		producer = get_next_index(producer, rds_ring->num_desc);
+	}
+
+	if (count) {
+		rds_ring->producer = producer;
+		writel((producer - 1) & (rds_ring->num_desc - 1),
+				rds_ring->crb_rcv_producer);
+	}
+	spin_unlock(&rds_ring->lock);
+}
+