Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 1222 insertions, 0 deletions

diff --git a/drivers/net/cxgbe/cxgbe_main.c b/drivers/net/cxgbe/cxgbe_main.c
new file mode 100644
index 00000000..ceaf5ab2
--- /dev/null
+++ b/drivers/net/cxgbe/cxgbe_main.c
@@ -0,0 +1,1222 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2014-2016 Chelsio Communications.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Chelsio Communications nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/queue.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <netinet/in.h>
+
+#include <rte_byteorder.h>
+#include <rte_common.h>
+#include <rte_cycles.h>
+#include <rte_interrupts.h>
+#include <rte_log.h>
+#include <rte_debug.h>
+#include <rte_pci.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_alarm.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_atomic.h>
+#include <rte_malloc.h>
+#include <rte_random.h>
+#include <rte_dev.h>
+
+#include "common.h"
+#include "t4_regs.h"
+#include "t4_msg.h"
+#include "cxgbe.h"
+
+/*
+ * Response queue handler for the FW event queue.
+ */
+static int fwevtq_handler(struct sge_rspq *q, const __be64 *rsp,
+			  __rte_unused const struct pkt_gl *gl)
+{
+	u8 opcode = ((const struct rss_header *)rsp)->opcode;
+
+	rsp++;                                          /* skip RSS header */
+
+	/*
+	 * FW can send EGR_UPDATEs encapsulated in a CPL_FW4_MSG.
+	 */
+	if (unlikely(opcode == CPL_FW4_MSG &&
+		     ((const struct cpl_fw4_msg *)rsp)->type ==
+		      FW_TYPE_RSSCPL)) {
+		rsp++;
+		opcode = ((const struct rss_header *)rsp)->opcode;
+		rsp++;
+		if (opcode != CPL_SGE_EGR_UPDATE) {
+			dev_err(q->adapter, "unexpected FW4/CPL %#x on FW event queue\n",
+				opcode);
+			goto out;
+		}
+	}
+
+	if (likely(opcode == CPL_SGE_EGR_UPDATE)) {
+		/* do nothing */
+	} else if (opcode == CPL_FW6_MSG || opcode == CPL_FW4_MSG) {
+		const struct cpl_fw6_msg *msg = (const void *)rsp;
+
+		t4_handle_fw_rpl(q->adapter, msg->data);
+	} else {
+		dev_err(adapter, "unexpected CPL %#x on FW event queue\n",
+			opcode);
+	}
+out:
+	return 0;
+}
+
+int setup_sge_fwevtq(struct adapter *adapter)
+{
+	struct sge *s = &adapter->sge;
+	int err = 0;
+	int msi_idx = 0;
+
+	err = t4_sge_alloc_rxq(adapter, &s->fw_evtq, true, adapter->eth_dev,
+			       msi_idx, NULL, fwevtq_handler, -1, NULL, 0,
+			       rte_socket_id());
+	return err;
+}
+
+static int closest_timer(const struct sge *s, int time)
+{
+	unsigned int i, match = 0;
+	int delta, min_delta = INT_MAX;
+
+	for (i = 0; i < ARRAY_SIZE(s->timer_val); i++) {
+		delta = time - s->timer_val[i];
+		if (delta < 0)
+			delta = -delta;
+		if (delta < min_delta) {
+			min_delta = delta;
+			match = i;
+		}
+	}
+	return match;
+}
+
+static int closest_thres(const struct sge *s, int thres)
+{
+	unsigned int i, match = 0;
+	int delta, min_delta = INT_MAX;
+
+	for (i = 0; i < ARRAY_SIZE(s->counter_val); i++) {
+		delta = thres - s->counter_val[i];
+		if (delta < 0)
+			delta = -delta;
+		if (delta < min_delta) {
+			min_delta = delta;
+			match = i;
+		}
+	}
+	return match;
+}
+
+/**
+ * cxgb4_set_rspq_intr_params - set a queue's interrupt holdoff parameters
+ * @q: the Rx queue
+ * @us: the hold-off time in us, or 0 to disable timer
+ * @cnt: the hold-off packet count, or 0 to disable counter
+ *
+ * Sets an Rx queue's interrupt hold-off time and packet count.  At least
+ * one of the two needs to be enabled for the queue to generate interrupts.
+ */
+int cxgb4_set_rspq_intr_params(struct sge_rspq *q, unsigned int us,
+			       unsigned int cnt)
+{
+	struct adapter *adap = q->adapter;
+	unsigned int timer_val;
+
+	if (cnt) {
+		int err;
+		u32 v, new_idx;
+
+		new_idx = closest_thres(&adap->sge, cnt);
+		if (q->desc && q->pktcnt_idx != new_idx) {
+			/* the queue has already been created, update it */
+			v = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
+			    V_FW_PARAMS_PARAM_X(
+			    FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH) |
+			    V_FW_PARAMS_PARAM_YZ(q->cntxt_id);
+			err = t4_set_params(adap, adap->mbox, adap->pf, 0, 1,
+					    &v, &new_idx);
+			if (err)
+				return err;
+		}
+		q->pktcnt_idx = new_idx;
+	}
+
+	timer_val = (us == 0) ? X_TIMERREG_RESTART_COUNTER :
+				closest_timer(&adap->sge, us);
+
+	if ((us | cnt) == 0)
+		q->intr_params = V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX);
+	else
+		q->intr_params = V_QINTR_TIMER_IDX(timer_val) |
+				 V_QINTR_CNT_EN(cnt > 0);
+	return 0;
+}
+
+static inline bool is_x_1g_port(const struct link_config *lc)
+{
+	return (lc->supported & FW_PORT_CAP_SPEED_1G) != 0;
+}
+
+static inline bool is_x_10g_port(const struct link_config *lc)
+{
+	return ((lc->supported & FW_PORT_CAP_SPEED_10G) != 0 ||
+		(lc->supported & FW_PORT_CAP_SPEED_40G) != 0 ||
+		(lc->supported & FW_PORT_CAP_SPEED_100G) != 0);
+}
+
+inline void init_rspq(struct adapter *adap, struct sge_rspq *q,
+		      unsigned int us, unsigned int cnt,
+		      unsigned int size, unsigned int iqe_size)
+{
+	q->adapter = adap;
+	cxgb4_set_rspq_intr_params(q, us, cnt);
+	q->iqe_len = iqe_size;
+	q->size = size;
+}
+
+int cfg_queue_count(struct rte_eth_dev *eth_dev)
+{
+	struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+	struct adapter *adap = pi->adapter;
+	struct sge *s = &adap->sge;
+	unsigned int max_queues = s->max_ethqsets / adap->params.nports;
+
+	if ((eth_dev->data->nb_rx_queues < 1) ||
+	    (eth_dev->data->nb_tx_queues < 1))
+		return -EINVAL;
+
+	if ((eth_dev->data->nb_rx_queues > max_queues) ||
+	    (eth_dev->data->nb_tx_queues > max_queues))
+		return -EINVAL;
+
+	if (eth_dev->data->nb_rx_queues > pi->rss_size)
+		return -EINVAL;
+
+	/* We must configure RSS, since config has changed*/
+	pi->flags &= ~PORT_RSS_DONE;
+
+	pi->n_rx_qsets = eth_dev->data->nb_rx_queues;
+	pi->n_tx_qsets = eth_dev->data->nb_tx_queues;
+
+	return 0;
+}
+
+void cfg_queues(struct rte_eth_dev *eth_dev)
+{
+	struct rte_config *config = rte_eal_get_configuration();
+	struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+	struct adapter *adap = pi->adapter;
+	struct sge *s = &adap->sge;
+	unsigned int i, nb_ports = 0, qidx = 0;
+	unsigned int q_per_port = 0;
+
+	if (!(adap->flags & CFG_QUEUES)) {
+		for_each_port(adap, i) {
+			struct port_info *tpi = adap2pinfo(adap, i);
+
+			nb_ports += (is_x_10g_port(&tpi->link_cfg)) ||
+				     is_x_1g_port(&tpi->link_cfg) ? 1 : 0;
+		}
+
+		/*
+		 * We default up to # of cores queues per 1G/10G port.
+		 */
+		if (nb_ports)
+			q_per_port = (MAX_ETH_QSETS -
+				     (adap->params.nports - nb_ports)) /
+				     nb_ports;
+
+		if (q_per_port > config->lcore_count)
+			q_per_port = config->lcore_count;
+
+		for_each_port(adap, i) {
+			struct port_info *pi = adap2pinfo(adap, i);
+
+			pi->first_qset = qidx;
+
+			/* Initially n_rx_qsets == n_tx_qsets */
+			pi->n_rx_qsets = (is_x_10g_port(&pi->link_cfg) ||
+					  is_x_1g_port(&pi->link_cfg)) ?
+					  q_per_port : 1;
+			pi->n_tx_qsets = pi->n_rx_qsets;
+
+			if (pi->n_rx_qsets > pi->rss_size)
+				pi->n_rx_qsets = pi->rss_size;
+
+			qidx += pi->n_rx_qsets;
+		}
+
+		s->max_ethqsets = qidx;
+
+		for (i = 0; i < ARRAY_SIZE(s->ethrxq); i++) {
+			struct sge_eth_rxq *r = &s->ethrxq[i];
+
+			init_rspq(adap, &r->rspq, 0, 0, 1024, 64);
+			r->usembufs = 1;
+			r->fl.size = (r->usembufs ? 1024 : 72);
+		}
+
+		for (i = 0; i < ARRAY_SIZE(s->ethtxq); i++)
+			s->ethtxq[i].q.size = 1024;
+
+		init_rspq(adap, &adap->sge.fw_evtq, 0, 0, 1024, 64);
+		adap->flags |= CFG_QUEUES;
+	}
+}
+
+void cxgbe_stats_get(struct port_info *pi, struct port_stats *stats)
+{
+	t4_get_port_stats_offset(pi->adapter, pi->tx_chan, stats,
+				 &pi->stats_base);
+}
+
+void cxgbe_stats_reset(struct port_info *pi)
+{
+	t4_clr_port_stats(pi->adapter, pi->tx_chan);
+}
+
+static void setup_memwin(struct adapter *adap)
+{
+	u32 mem_win0_base;
+
+	/* For T5, only relative offset inside the PCIe BAR is passed */
+	mem_win0_base = MEMWIN0_BASE;
+
+	/*
+	 * Set up memory window for accessing adapter memory ranges.  (Read
+	 * back MA register to ensure that changes propagate before we attempt
+	 * to use the new values.)
+	 */
+	t4_write_reg(adap,
+		     PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN,
+					 MEMWIN_NIC),
+		     mem_win0_base | V_BIR(0) |
+		     V_WINDOW(ilog2(MEMWIN0_APERTURE) - X_WINDOW_SHIFT));
+	t4_read_reg(adap,
+		    PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN,
+					MEMWIN_NIC));
+}
+
+static int init_rss(struct adapter *adap)
+{
+	unsigned int i;
+	int err;
+
+	err = t4_init_rss_mode(adap, adap->mbox);
+	if (err)
+		return err;
+
+	for_each_port(adap, i) {
+		struct port_info *pi = adap2pinfo(adap, i);
+
+		pi->rss = rte_zmalloc(NULL, pi->rss_size * sizeof(u16), 0);
+		if (!pi->rss)
+			return -ENOMEM;
+	}
+	return 0;
+}
+
+static void print_port_info(struct adapter *adap)
+{
+	int i;
+	char buf[80];
+	struct rte_pci_addr *loc = &adap->pdev->addr;
+
+	for_each_port(adap, i) {
+		const struct port_info *pi = &adap->port[i];
+		char *bufp = buf;
+
+		if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_100M)
+			bufp += sprintf(bufp, "100/");
+		if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_1G)
+			bufp += sprintf(bufp, "1000/");
+		if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_10G)
+			bufp += sprintf(bufp, "10G/");
+		if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_40G)
+			bufp += sprintf(bufp, "40G/");
+		if (bufp != buf)
+			--bufp;
+		sprintf(bufp, "BASE-%s",
+			t4_get_port_type_description(
+					(enum fw_port_type)pi->port_type));
+
+		dev_info(adap,
+			 " " PCI_PRI_FMT " Chelsio rev %d %s %s\n",
+			 loc->domain, loc->bus, loc->devid, loc->function,
+			 CHELSIO_CHIP_RELEASE(adap->params.chip), buf,
+			 (adap->flags & USING_MSIX) ? " MSI-X" :
+			 (adap->flags & USING_MSI) ? " MSI" : "");
+	}
+}
+
+/*
+ * Tweak configuration based on system architecture, etc.  Most of these have
+ * defaults assigned to them by Firmware Configuration Files (if we're using
+ * them) but need to be explicitly set if we're using hard-coded
+ * initialization. So these are essentially common tweaks/settings for
+ * Configuration Files and hard-coded initialization ...
+ */
+static int adap_init0_tweaks(struct adapter *adapter)
+{
+	u8 rx_dma_offset;
+
+	/*
+	 * Fix up various Host-Dependent Parameters like Page Size, Cache
+	 * Line Size, etc.  The firmware default is for a 4KB Page Size and
+	 * 64B Cache Line Size ...
+	 */
+	t4_fixup_host_params_compat(adapter, CXGBE_PAGE_SIZE, L1_CACHE_BYTES,
+				    T5_LAST_REV);
+
+	/*
+	 * Keep the chip default offset to deliver Ingress packets into our
+	 * DMA buffers to zero
+	 */
+	rx_dma_offset = 0;
+	t4_set_reg_field(adapter, A_SGE_CONTROL, V_PKTSHIFT(M_PKTSHIFT),
+			 V_PKTSHIFT(rx_dma_offset));
+
+	t4_set_reg_field(adapter, A_SGE_FLM_CFG,
+			 V_CREDITCNT(M_CREDITCNT) | M_CREDITCNTPACKING,
+			 V_CREDITCNT(3) | V_CREDITCNTPACKING(1));
+
+	t4_set_reg_field(adapter, A_SGE_CONTROL2, V_IDMAARBROUNDROBIN(1U),
+			 V_IDMAARBROUNDROBIN(1U));
+
+	/*
+	 * Don't include the "IP Pseudo Header" in CPL_RX_PKT checksums: Linux
+	 * adds the pseudo header itself.
+	 */
+	t4_tp_wr_bits_indirect(adapter, A_TP_INGRESS_CONFIG,
+			       F_CSUM_HAS_PSEUDO_HDR, 0);
+
+	return 0;
+}
+
+/*
+ * Attempt to initialize the adapter via a Firmware Configuration File.
+ */
+static int adap_init0_config(struct adapter *adapter, int reset)
+{
+	struct fw_caps_config_cmd caps_cmd;
+	unsigned long mtype = 0, maddr = 0;
+	u32 finiver, finicsum, cfcsum;
+	int ret;
+	int config_issued = 0;
+	int cfg_addr;
+	char config_name[20];
+
+	/*
+	 * Reset device if necessary.
+	 */
+	if (reset) {
+		ret = t4_fw_reset(adapter, adapter->mbox,
+				  F_PIORSTMODE | F_PIORST);
+		if (ret < 0) {
+			dev_warn(adapter, "Firmware reset failed, error %d\n",
+				 -ret);
+			goto bye;
+		}
+	}
+
+	cfg_addr = t4_flash_cfg_addr(adapter);
+	if (cfg_addr < 0) {
+		ret = cfg_addr;
+		dev_warn(adapter, "Finding address for firmware config file in flash failed, error %d\n",
+			 -ret);
+		goto bye;
+	}
+
+	strcpy(config_name, "On Flash");
+	mtype = FW_MEMTYPE_CF_FLASH;
+	maddr = cfg_addr;
+
+	/*
+	 * Issue a Capability Configuration command to the firmware to get it
+	 * to parse the Configuration File.  We don't use t4_fw_config_file()
+	 * because we want the ability to modify various features after we've
+	 * processed the configuration file ...
+	 */
+	memset(&caps_cmd, 0, sizeof(caps_cmd));
+	caps_cmd.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
+					   F_FW_CMD_REQUEST | F_FW_CMD_READ);
+	caps_cmd.cfvalid_to_len16 =
+		cpu_to_be32(F_FW_CAPS_CONFIG_CMD_CFVALID |
+			    V_FW_CAPS_CONFIG_CMD_MEMTYPE_CF(mtype) |
+			    V_FW_CAPS_CONFIG_CMD_MEMADDR64K_CF(maddr >> 16) |
+			    FW_LEN16(caps_cmd));
+	ret = t4_wr_mbox(adapter, adapter->mbox, &caps_cmd, sizeof(caps_cmd),
+			 &caps_cmd);
+	/*
+	 * If the CAPS_CONFIG failed with an ENOENT (for a Firmware
+	 * Configuration File in FLASH), our last gasp effort is to use the
+	 * Firmware Configuration File which is embedded in the firmware.  A
+	 * very few early versions of the firmware didn't have one embedded
+	 * but we can ignore those.
+	 */
+	if (ret == -ENOENT) {
+		dev_info(adapter, "%s: Going for embedded config in firmware..\n",
+			 __func__);
+
+		memset(&caps_cmd, 0, sizeof(caps_cmd));
+		caps_cmd.op_to_write =
+			cpu_to_be32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
+				    F_FW_CMD_REQUEST | F_FW_CMD_READ);
+		caps_cmd.cfvalid_to_len16 = cpu_to_be32(FW_LEN16(caps_cmd));
+		ret = t4_wr_mbox(adapter, adapter->mbox, &caps_cmd,
+				 sizeof(caps_cmd), &caps_cmd);
+		strcpy(config_name, "Firmware Default");
+	}
+
+	config_issued = 1;
+	if (ret < 0)
+		goto bye;
+
+	finiver = be32_to_cpu(caps_cmd.finiver);
+	finicsum = be32_to_cpu(caps_cmd.finicsum);
+	cfcsum = be32_to_cpu(caps_cmd.cfcsum);
+	if (finicsum != cfcsum)
+		dev_warn(adapter, "Configuration File checksum mismatch: [fini] csum=%#x, computed csum=%#x\n",
+			 finicsum, cfcsum);
+
+	/*
+	 * If we're a pure NIC driver then disable all offloading facilities.
+	 * This will allow the firmware to optimize aspects of the hardware
+	 * configuration which will result in improved performance.
+	 */
+	caps_cmd.niccaps &= cpu_to_be16(~(FW_CAPS_CONFIG_NIC_HASHFILTER |
+					  FW_CAPS_CONFIG_NIC_ETHOFLD));
+	caps_cmd.toecaps = 0;
+	caps_cmd.iscsicaps = 0;
+	caps_cmd.rdmacaps = 0;
+	caps_cmd.fcoecaps = 0;
+
+	/*
+	 * And now tell the firmware to use the configuration we just loaded.
+	 */
+	caps_cmd.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
+					   F_FW_CMD_REQUEST | F_FW_CMD_WRITE);
+	caps_cmd.cfvalid_to_len16 = htonl(FW_LEN16(caps_cmd));
+	ret = t4_wr_mbox(adapter, adapter->mbox, &caps_cmd, sizeof(caps_cmd),
+			 NULL);
+	if (ret < 0) {
+		dev_warn(adapter, "Unable to finalize Firmware Capabilities %d\n",
+			 -ret);
+		goto bye;
+	}
+
+	/*
+	 * Tweak configuration based on system architecture, etc.
+	 */
+	ret = adap_init0_tweaks(adapter);
+	if (ret < 0) {
+		dev_warn(adapter, "Unable to do init0-tweaks %d\n", -ret);
+		goto bye;
+	}
+
+	/*
+	 * And finally tell the firmware to initialize itself using the
+	 * parameters from the Configuration File.
+	 */
+	ret = t4_fw_initialize(adapter, adapter->mbox);
+	if (ret < 0) {
+		dev_warn(adapter, "Initializing Firmware failed, error %d\n",
+			 -ret);
+		goto bye;
+	}
+
+	/*
+	 * Return successfully and note that we're operating with parameters
+	 * not supplied by the driver, rather than from hard-wired
+	 * initialization constants burried in the driver.
+	 */
+	dev_info(adapter,
+		 "Successfully configured using Firmware Configuration File \"%s\", version %#x, computed checksum %#x\n",
+		 config_name, finiver, cfcsum);
+
+	return 0;
+
+	/*
+	 * Something bad happened.  Return the error ...  (If the "error"
+	 * is that there's no Configuration File on the adapter we don't
+	 * want to issue a warning since this is fairly common.)
+	 */
+bye:
+	if (config_issued && ret != -ENOENT)
+		dev_warn(adapter, "\"%s\" configuration file error %d\n",
+			 config_name, -ret);
+
+	dev_debug(adapter, "%s: returning ret = %d ..\n", __func__, ret);
+	return ret;
+}
+
+static int adap_init0(struct adapter *adap)
+{
+	int ret = 0;
+	u32 v, port_vec;
+	enum dev_state state;
+	u32 params[7], val[7];
+	int reset = 1;
+	int mbox = adap->mbox;
+
+	/*
+	 * Contact FW, advertising Master capability.
+	 */
+	ret = t4_fw_hello(adap, adap->mbox, adap->mbox, MASTER_MAY, &state);
+	if (ret < 0) {
+		dev_err(adap, "%s: could not connect to FW, error %d\n",
+			__func__, -ret);
+		goto bye;
+	}
+
+	CXGBE_DEBUG_MBOX(adap, "%s: adap->mbox = %d; ret = %d\n", __func__,
+			 adap->mbox, ret);
+
+	if (ret == mbox)
+		adap->flags |= MASTER_PF;
+
+	if (state == DEV_STATE_INIT) {
+		/*
+		 * Force halt and reset FW because a previous instance may have
+		 * exited abnormally without properly shutting down
+		 */
+		ret = t4_fw_halt(adap, adap->mbox, reset);
+		if (ret < 0) {
+			dev_err(adap, "Failed to halt. Exit.\n");
+			goto bye;
+		}
+
+		ret = t4_fw_restart(adap, adap->mbox, reset);
+		if (ret < 0) {
+			dev_err(adap, "Failed to restart. Exit.\n");
+			goto bye;
+		}
+		state = (enum dev_state)((unsigned)state & ~DEV_STATE_INIT);
+	}
+
+	t4_get_fw_version(adap, &adap->params.fw_vers);
+	t4_get_tp_version(adap, &adap->params.tp_vers);
+
+	dev_info(adap, "fw: %u.%u.%u.%u, TP: %u.%u.%u.%u\n",
+		 G_FW_HDR_FW_VER_MAJOR(adap->params.fw_vers),
+		 G_FW_HDR_FW_VER_MINOR(adap->params.fw_vers),
+		 G_FW_HDR_FW_VER_MICRO(adap->params.fw_vers),
+		 G_FW_HDR_FW_VER_BUILD(adap->params.fw_vers),
+		 G_FW_HDR_FW_VER_MAJOR(adap->params.tp_vers),
+		 G_FW_HDR_FW_VER_MINOR(adap->params.tp_vers),
+		 G_FW_HDR_FW_VER_MICRO(adap->params.tp_vers),
+		 G_FW_HDR_FW_VER_BUILD(adap->params.tp_vers));
+
+	ret = t4_get_core_clock(adap, &adap->params.vpd);
+	if (ret < 0) {
+		dev_err(adap, "%s: could not get core clock, error %d\n",
+			__func__, -ret);
+		goto bye;
+	}
+
+	/*
+	 * Find out what ports are available to us.  Note that we need to do
+	 * this before calling adap_init0_no_config() since it needs nports
+	 * and portvec ...
+	 */
+	v = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
+	    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_PORTVEC);
+	ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1, &v, &port_vec);
+	if (ret < 0) {
+		dev_err(adap, "%s: failure in t4_queury_params; error = %d\n",
+			__func__, ret);
+		goto bye;
+	}
+
+	adap->params.nports = hweight32(port_vec);
+	adap->params.portvec = port_vec;
+
+	dev_debug(adap, "%s: adap->params.nports = %u\n", __func__,
+		  adap->params.nports);
+
+	/*
+	 * If the firmware is initialized already (and we're not forcing a
+	 * master initialization), note that we're living with existing
+	 * adapter parameters.  Otherwise, it's time to try initializing the
+	 * adapter ...
+	 */
+	if (state == DEV_STATE_INIT) {
+		dev_info(adap, "Coming up as %s: Adapter already initialized\n",
+			 adap->flags & MASTER_PF ? "MASTER" : "SLAVE");
+	} else {
+		dev_info(adap, "Coming up as MASTER: Initializing adapter\n");
+
+		ret = adap_init0_config(adap, reset);
+		if (ret == -ENOENT) {
+			dev_err(adap,
+				"No Configuration File present on adapter. Using hard-wired configuration parameters.\n");
+			goto bye;
+		}
+	}
+	if (ret < 0) {
+		dev_err(adap, "could not initialize adapter, error %d\n", -ret);
+		goto bye;
+	}
+
+	/*
+	 * Give the SGE code a chance to pull in anything that it needs ...
+	 * Note that this must be called after we retrieve our VPD parameters
+	 * in order to know how to convert core ticks to seconds, etc.
+	 */
+	ret = t4_sge_init(adap);
+	if (ret < 0) {
+		dev_err(adap, "t4_sge_init failed with error %d\n",
+			-ret);
+		goto bye;
+	}
+
+	/*
+	 * Grab some of our basic fundamental operating parameters.
+	 */
+#define FW_PARAM_DEV(param) \
+	(V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) | \
+	 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_##param))
+
+#define FW_PARAM_PFVF(param) \
+	(V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF) | \
+	 V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_##param) |  \
+	 V_FW_PARAMS_PARAM_Y(0) | \
+	 V_FW_PARAMS_PARAM_Z(0))
+
+	/* If we're running on newer firmware, let it know that we're
+	 * prepared to deal with encapsulated CPL messages.  Older
+	 * firmware won't understand this and we'll just get
+	 * unencapsulated messages ...
+	 */
+	params[0] = FW_PARAM_PFVF(CPLFW4MSG_ENCAP);
+	val[0] = 1;
+	(void)t4_set_params(adap, adap->mbox, adap->pf, 0, 1, params, val);
+
+	/*
+	 * Find out whether we're allowed to use the T5+ ULPTX MEMWRITE DSGL
+	 * capability.  Earlier versions of the firmware didn't have the
+	 * ULPTX_MEMWRITE_DSGL so we'll interpret a query failure as no
+	 * permission to use ULPTX MEMWRITE DSGL.
+	 */
+	if (is_t4(adap->params.chip)) {
+		adap->params.ulptx_memwrite_dsgl = false;
+	} else {
+		params[0] = FW_PARAM_DEV(ULPTX_MEMWRITE_DSGL);
+		ret = t4_query_params(adap, adap->mbox, adap->pf, 0,
+				      1, params, val);
+		adap->params.ulptx_memwrite_dsgl = (ret == 0 && val[0] != 0);
+	}
+
+	/*
+	 * The MTU/MSS Table is initialized by now, so load their values.  If
+	 * we're initializing the adapter, then we'll make any modifications
+	 * we want to the MTU/MSS Table and also initialize the congestion
+	 * parameters.
+	 */
+	t4_read_mtu_tbl(adap, adap->params.mtus, NULL);
+	if (state != DEV_STATE_INIT) {
+		int i;
+
+		/*
+		 * The default MTU Table contains values 1492 and 1500.
+		 * However, for TCP, it's better to have two values which are
+		 * a multiple of 8 +/- 4 bytes apart near this popular MTU.
+		 * This allows us to have a TCP Data Payload which is a
+		 * multiple of 8 regardless of what combination of TCP Options
+		 * are in use (always a multiple of 4 bytes) which is
+		 * important for performance reasons.  For instance, if no
+		 * options are in use, then we have a 20-byte IP header and a
+		 * 20-byte TCP header.  In this case, a 1500-byte MSS would
+		 * result in a TCP Data Payload of 1500 - 40 == 1460 bytes
+		 * which is not a multiple of 8.  So using an MSS of 1488 in
+		 * this case results in a TCP Data Payload of 1448 bytes which
+		 * is a multiple of 8.  On the other hand, if 12-byte TCP Time
+		 * Stamps have been negotiated, then an MTU of 1500 bytes
+		 * results in a TCP Data Payload of 1448 bytes which, as
+		 * above, is a multiple of 8 bytes ...
+		 */
+		for (i = 0; i < NMTUS; i++)
+			if (adap->params.mtus[i] == 1492) {
+				adap->params.mtus[i] = 1488;
+				break;
+			}
+
+		t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
+			     adap->params.b_wnd);
+	}
+	t4_init_sge_params(adap);
+	t4_init_tp_params(adap);
+
+	adap->params.drv_memwin = MEMWIN_NIC;
+	adap->flags |= FW_OK;
+	dev_debug(adap, "%s: returning zero..\n", __func__);
+	return 0;
+
+	/*
+	 * Something bad happened.  If a command timed out or failed with EIO
+	 * FW does not operate within its spec or something catastrophic
+	 * happened to HW/FW, stop issuing commands.
+	 */
+bye:
+	if (ret != -ETIMEDOUT && ret != -EIO)
+		t4_fw_bye(adap, adap->mbox);
+	return ret;
+}
+
+/**
+ * t4_os_portmod_changed - handle port module changes
+ * @adap: the adapter associated with the module change
+ * @port_id: the port index whose module status has changed
+ *
+ * This is the OS-dependent handler for port module changes.  It is
+ * invoked when a port module is removed or inserted for any OS-specific
+ * processing.
+ */
+void t4_os_portmod_changed(const struct adapter *adap, int port_id)
+{
+	static const char * const mod_str[] = {
+		NULL, "LR", "SR", "ER", "passive DA", "active DA", "LRM"
+	};
+
+	const struct port_info *pi = &adap->port[port_id];
+
+	if (pi->mod_type == FW_PORT_MOD_TYPE_NONE)
+		dev_info(adap, "Port%d: port module unplugged\n", pi->port_id);
+	else if (pi->mod_type < ARRAY_SIZE(mod_str))
+		dev_info(adap, "Port%d: %s port module inserted\n", pi->port_id,
+			 mod_str[pi->mod_type]);
+	else if (pi->mod_type == FW_PORT_MOD_TYPE_NOTSUPPORTED)
+		dev_info(adap, "Port%d: unsupported optical port module inserted\n",
+			 pi->port_id);
+	else if (pi->mod_type == FW_PORT_MOD_TYPE_UNKNOWN)
+		dev_info(adap, "Port%d: unknown port module inserted, forcing TWINAX\n",
+			 pi->port_id);
+	else if (pi->mod_type == FW_PORT_MOD_TYPE_ERROR)
+		dev_info(adap, "Port%d: transceiver module error\n",
+			 pi->port_id);
+	else
+		dev_info(adap, "Port%d: unknown module type %d inserted\n",
+			 pi->port_id, pi->mod_type);
+}
+
+/**
+ * link_start - enable a port
+ * @dev: the port to enable
+ *
+ * Performs the MAC and PHY actions needed to enable a port.
+ */
+int link_start(struct port_info *pi)
+{
+	struct adapter *adapter = pi->adapter;
+	int ret;
+	unsigned int mtu;
+
+	mtu = pi->eth_dev->data->dev_conf.rxmode.max_rx_pkt_len -
+	      (ETHER_HDR_LEN + ETHER_CRC_LEN);
+
+	/*
+	 * We do not set address filters and promiscuity here, the stack does
+	 * that step explicitly.
+	 */
+	ret = t4_set_rxmode(adapter, adapter->mbox, pi->viid, mtu, -1, -1,
+			    -1, 1, true);
+	if (ret == 0) {
+		ret = t4_change_mac(adapter, adapter->mbox, pi->viid,
+				    pi->xact_addr_filt,
+				    (u8 *)&pi->eth_dev->data->mac_addrs[0],
+				    true, true);
+		if (ret >= 0) {
+			pi->xact_addr_filt = ret;
+			ret = 0;
+		}
+	}
+	if (ret == 0)
+		ret = t4_link_l1cfg(adapter, adapter->mbox, pi->tx_chan,
+				    &pi->link_cfg);
+	if (ret == 0) {
+		/*
+		 * Enabling a Virtual Interface can result in an interrupt
+		 * during the processing of the VI Enable command and, in some
+		 * paths, result in an attempt to issue another command in the
+		 * interrupt context.  Thus, we disable interrupts during the
+		 * course of the VI Enable command ...
+		 */
+		ret = t4_enable_vi_params(adapter, adapter->mbox, pi->viid,
+					  true, true, false);
+	}
+	return ret;
+}
+
+/**
+ * cxgb4_write_rss - write the RSS table for a given port
+ * @pi: the port
+ * @queues: array of queue indices for RSS
+ *
+ * Sets up the portion of the HW RSS table for the port's VI to distribute
+ * packets to the Rx queues in @queues.
+ */
+int cxgb4_write_rss(const struct port_info *pi, const u16 *queues)
+{
+	u16 *rss;
+	int i, err;
+	struct adapter *adapter = pi->adapter;
+	const struct sge_eth_rxq *rxq;
+
+	/*  Should never be called before setting up sge eth rx queues */
+	BUG_ON(!(adapter->flags & FULL_INIT_DONE));
+
+	rxq = &adapter->sge.ethrxq[pi->first_qset];
+	rss = rte_zmalloc(NULL, pi->rss_size * sizeof(u16), 0);
+	if (!rss)
+		return -ENOMEM;
+
+	/* map the queue indices to queue ids */
+	for (i = 0; i < pi->rss_size; i++, queues++)
+		rss[i] = rxq[*queues].rspq.abs_id;
+
+	err = t4_config_rss_range(adapter, adapter->pf, pi->viid, 0,
+				  pi->rss_size, rss, pi->rss_size);
+	/*
+	 * If Tunnel All Lookup isn't specified in the global RSS
+	 * Configuration, then we need to specify a default Ingress
+	 * Queue for any ingress packets which aren't hashed.  We'll
+	 * use our first ingress queue ...
+	 */
+	if (!err)
+		err = t4_config_vi_rss(adapter, adapter->mbox, pi->viid,
+				       F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN |
+				       F_FW_RSS_VI_CONFIG_CMD_IP6TWOTUPEN |
+				       F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN |
+				       F_FW_RSS_VI_CONFIG_CMD_IP4TWOTUPEN |
+				       F_FW_RSS_VI_CONFIG_CMD_UDPEN,
+				       rss[0]);
+	rte_free(rss);
+	return err;
+}
+
+/**
+ * setup_rss - configure RSS
+ * @adapter: the adapter
+ *
+ * Sets up RSS to distribute packets to multiple receive queues.  We
+ * configure the RSS CPU lookup table to distribute to the number of HW
+ * receive queues, and the response queue lookup table to narrow that
+ * down to the response queues actually configured for each port.
+ * We always configure the RSS mapping for all ports since the mapping
+ * table has plenty of entries.
+ */
+int setup_rss(struct port_info *pi)
+{
+	int j, err;
+	struct adapter *adapter = pi->adapter;
+
+	dev_debug(adapter, "%s:  pi->rss_size = %u; pi->n_rx_qsets = %u\n",
+		  __func__, pi->rss_size, pi->n_rx_qsets);
+
+	if (!pi->flags & PORT_RSS_DONE) {
+		if (adapter->flags & FULL_INIT_DONE) {
+			/* Fill default values with equal distribution */
+			for (j = 0; j < pi->rss_size; j++)
+				pi->rss[j] = j % pi->n_rx_qsets;
+
+			err = cxgb4_write_rss(pi, pi->rss);
+			if (err)
+				return err;
+			pi->flags |= PORT_RSS_DONE;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Enable NAPI scheduling and interrupt generation for all Rx queues.
+ */
+static void enable_rx(struct adapter *adap)
+{
+	struct sge *s = &adap->sge;
+	struct sge_rspq *q = &s->fw_evtq;
+	int i, j;
+
+	/* 0-increment GTS to start the timer and enable interrupts */
+	t4_write_reg(adap, MYPF_REG(A_SGE_PF_GTS),
+		     V_SEINTARM(q->intr_params) |
+		     V_INGRESSQID(q->cntxt_id));
+
+	for_each_port(adap, i) {
+		const struct port_info *pi = &adap->port[i];
+		struct rte_eth_dev *eth_dev = pi->eth_dev;
+
+		for (j = 0; j < eth_dev->data->nb_rx_queues; j++) {
+			q = eth_dev->data->rx_queues[j];
+
+			/*
+			 * 0-increment GTS to start the timer and enable
+			 * interrupts
+			 */
+			t4_write_reg(adap, MYPF_REG(A_SGE_PF_GTS),
+				     V_SEINTARM(q->intr_params) |
+				     V_INGRESSQID(q->cntxt_id));
+		}
+	}
+}
+
+/**
+ * cxgb_up - enable the adapter
+ * @adap: adapter being enabled
+ *
+ * Called when the first port is enabled, this function performs the
+ * actions necessary to make an adapter operational, such as completing
+ * the initialization of HW modules, and enabling interrupts.
+ */
+int cxgbe_up(struct adapter *adap)
+{
+	enable_rx(adap);
+	t4_sge_tx_monitor_start(adap);
+	t4_intr_enable(adap);
+	adap->flags |= FULL_INIT_DONE;
+
+	/* TODO: deadman watchdog ?? */
+	return 0;
+}
+
+/*
+ * Close the port
+ */
+int cxgbe_down(struct port_info *pi)
+{
+	struct adapter *adapter = pi->adapter;
+	int err = 0;
+
+	err = t4_enable_vi(adapter, adapter->mbox, pi->viid, false, false);
+	if (err) {
+		dev_err(adapter, "%s: disable_vi failed: %d\n", __func__, err);
+		return err;
+	}
+
+	t4_reset_link_config(adapter, pi->port_id);
+	return 0;
+}
+
+/*
+ * Release resources when all the ports have been stopped.
+ */
+void cxgbe_close(struct adapter *adapter)
+{
+	struct port_info *pi;
+	int i;
+
+	if (adapter->flags & FULL_INIT_DONE) {
+		t4_intr_disable(adapter);
+		t4_sge_tx_monitor_stop(adapter);
+		t4_free_sge_resources(adapter);
+		for_each_port(adapter, i) {
+			pi = adap2pinfo(adapter, i);
+			if (pi->viid != 0)
+				t4_free_vi(adapter, adapter->mbox,
+					   adapter->pf, 0, pi->viid);
+			rte_free(pi->eth_dev->data->mac_addrs);
+		}
+		adapter->flags &= ~FULL_INIT_DONE;
+	}
+
+	if (adapter->flags & FW_OK)
+		t4_fw_bye(adapter, adapter->mbox);
+}
+
+int cxgbe_probe(struct adapter *adapter)
+{
+	struct port_info *pi;
+	int func, i;
+	int err = 0;
+
+	func = G_SOURCEPF(t4_read_reg(adapter, A_PL_WHOAMI));
+	adapter->mbox = func;
+	adapter->pf = func;
+
+	t4_os_lock_init(&adapter->mbox_lock);
+	TAILQ_INIT(&adapter->mbox_list);
+
+	err = t4_prep_adapter(adapter);
+	if (err)
+		return err;
+
+	setup_memwin(adapter);
+	err = adap_init0(adapter);
+	if (err) {
+		dev_err(adapter, "%s: Adapter initialization failed, error %d\n",
+			__func__, err);
+		goto out_free;
+	}
+
+	if (!is_t4(adapter->params.chip)) {
+		/*
+		 * The userspace doorbell BAR is split evenly into doorbell
+		 * regions, each associated with an egress queue.  If this
+		 * per-queue region is large enough (at least UDBS_SEG_SIZE)
+		 * then it can be used to submit a tx work request with an
+		 * implied doorbell.  Enable write combining on the BAR if
+		 * there is room for such work requests.
+		 */
+		int s_qpp, qpp, num_seg;
+
+		s_qpp = (S_QUEUESPERPAGEPF0 +
+			(S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) *
+			adapter->pf);
+		qpp = 1 << ((t4_read_reg(adapter,
+				A_SGE_EGRESS_QUEUES_PER_PAGE_PF) >> s_qpp)
+				& M_QUEUESPERPAGEPF0);
+		num_seg = CXGBE_PAGE_SIZE / UDBS_SEG_SIZE;
+		if (qpp > num_seg)
+			dev_warn(adapter, "Incorrect SGE EGRESS QUEUES_PER_PAGE configuration, continuing in debug mode\n");
+
+		adapter->bar2 = (void *)adapter->pdev->mem_resource[2].addr;
+		if (!adapter->bar2) {
+			dev_err(adapter, "cannot map device bar2 region\n");
+			err = -ENOMEM;
+			goto out_free;
+		}
+		t4_write_reg(adapter, A_SGE_STAT_CFG, V_STATSOURCE_T5(7) |
+			     V_STATMODE(0));
+	}
+
+	for_each_port(adapter, i) {
+		char name[RTE_ETH_NAME_MAX_LEN];
+		struct rte_eth_dev_data *data = NULL;
+		const unsigned int numa_node = rte_socket_id();
+
+		pi = &adapter->port[i];
+		pi->adapter = adapter;
+		pi->xact_addr_filt = -1;
+		pi->port_id = i;
+
+		snprintf(name, sizeof(name), "cxgbe%d",
+			 adapter->eth_dev->data->port_id + i);
+
+		if (i == 0) {
+			/* First port is already allocated by DPDK */
+			pi->eth_dev = adapter->eth_dev;
+			goto allocate_mac;
+		}
+
+		/*
+		 * now do all data allocation - for eth_dev structure,
+		 * and internal (private) data for the remaining ports
+		 */
+
+		/* reserve an ethdev entry */
+		pi->eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_PCI);
+		if (!pi->eth_dev)
+			goto out_free;
+
+		data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
+		if (!data)
+			goto out_free;
+
+		data->port_id = adapter->eth_dev->data->port_id + i;
+
+		pi->eth_dev->data = data;
+
+allocate_mac:
+		pi->eth_dev->pci_dev = adapter->pdev;
+		pi->eth_dev->data->dev_private = pi;
+		pi->eth_dev->driver = adapter->eth_dev->driver;
+		pi->eth_dev->dev_ops = adapter->eth_dev->dev_ops;
+		pi->eth_dev->tx_pkt_burst = adapter->eth_dev->tx_pkt_burst;
+		pi->eth_dev->rx_pkt_burst = adapter->eth_dev->rx_pkt_burst;
+
+		rte_eth_copy_pci_info(pi->eth_dev, pi->eth_dev->pci_dev);
+
+		TAILQ_INIT(&pi->eth_dev->link_intr_cbs);
+
+		pi->eth_dev->data->mac_addrs = rte_zmalloc(name,
+							   ETHER_ADDR_LEN, 0);
+		if (!pi->eth_dev->data->mac_addrs) {
+			dev_err(adapter, "%s: Mem allocation failed for storing mac addr, aborting\n",
+				__func__);
+			err = -1;
+			goto out_free;
+		}
+	}
+
+	if (adapter->flags & FW_OK) {
+		err = t4_port_init(adapter, adapter->mbox, adapter->pf, 0);
+		if (err) {
+			dev_err(adapter, "%s: t4_port_init failed with err %d\n",
+				__func__, err);
+			goto out_free;
+		}
+	}
+
+	cfg_queues(adapter->eth_dev);
+
+	print_port_info(adapter);
+
+	err = init_rss(adapter);
+	if (err)
+		goto out_free;
+
+	return 0;
+
+out_free:
+	for_each_port(adapter, i) {
+		pi = adap2pinfo(adapter, i);
+		if (pi->viid != 0)
+			t4_free_vi(adapter, adapter->mbox, adapter->pf,
+				   0, pi->viid);
+		/* Skip first port since it'll be de-allocated by DPDK */
+		if (i == 0)
+			continue;
+		if (pi->eth_dev->data)
+			rte_free(pi->eth_dev->data);
+	}
+
+	if (adapter->flags & FW_OK)
+		t4_fw_bye(adapter, adapter->mbox);
+	return -err;
+}