[dpdk.git] / drivers / net / cxgbe / cxgbe_main.c

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2014-2017 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_ethdev_pci.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)
{
        unsigned int speeds, high_speeds;

        speeds = V_FW_PORT_CAP_SPEED(G_FW_PORT_CAP_SPEED(lc->supported));
        high_speeds = speeds & ~(FW_PORT_CAP_SPEED_100M | FW_PORT_CAP_SPEED_1G);

        return high_speeds != 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, 5, 32, 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;
}

/**
 * Dump basic information about the adapter.
 */
static void print_adapter_info(struct adapter *adap)
{
        /**
         * Hardware/Firmware/etc. Version/Revision IDs.
         */
        t4_dump_version_info(adap);
}

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, "100M/");
                if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_1G)
                        bufp += sprintf(bufp, "1G/");
                if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_10G)
                        bufp += sprintf(bufp, "10G/");
                if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_25G)
                        bufp += sprintf(bufp, "25G/");
                if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_40G)
                        bufp += sprintf(bufp, "40G/");
                if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_100G)
                        bufp += sprintf(bufp, "100G/");
                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" : "");
        }
}

static void configure_pcie_ext_tag(struct adapter *adapter)
{
        u16 v;
        int pos = t4_os_find_pci_capability(adapter, PCI_CAP_ID_EXP);

        if (!pos)
                return;

        if (pos > 0) {
                t4_os_pci_read_cfg2(adapter, pos + PCI_EXP_DEVCTL, &v);
                v |= PCI_EXP_DEVCTL_EXT_TAG;
                t4_os_pci_write_cfg2(adapter, pos + PCI_EXP_DEVCTL, v);
                if (is_t6(adapter->params.chip)) {
                        t4_set_reg_field(adapter, A_PCIE_CFG2,
                                         V_T6_TOTMAXTAG(M_T6_TOTMAXTAG),
                                         V_T6_TOTMAXTAG(7));
                        t4_set_reg_field(adapter, A_PCIE_CMD_CFG,
                                         V_T6_MINTAG(M_T6_MINTAG),
                                         V_T6_MINTAG(8));
                } else {
                        t4_set_reg_field(adapter, A_PCIE_CFG2,
                                         V_TOTMAXTAG(M_TOTMAXTAG),
                                         V_TOTMAXTAG(3));
                        t4_set_reg_field(adapter, A_PCIE_CMD_CFG,
                                         V_MINTAG(M_MINTAG),
                                         V_MINTAG(8));
                }
        }
}

/*
 * 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_INGRESS_RX_THRESHOLD,
                         V_THRESHOLD_3(M_THRESHOLD_3), V_THRESHOLD_3(32U));

        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_version_info(adap);

        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;
        }

        /*
         * 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;
        }

        /* Find out what ports are available to us. */
        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_query_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);

        /*
         * 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);
        configure_pcie_ext_tag(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 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\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_rspq *q)
{
        /* 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));
}

void cxgbe_enable_rx_queues(struct port_info *pi)
{
        struct adapter *adap = pi->adapter;
        struct sge *s = &adap->sge;
        unsigned int i;

        for (i = 0; i < pi->n_rx_qsets; i++)
                enable_rx(adap, &s->ethrxq[pi->first_qset + i].rspq);
}

/**
 * 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, &adap->sge.fw_evtq);
        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 chip;
        int func, i;
        int err = 0;
        u32 whoami;

        whoami = t4_read_reg(adapter, A_PL_WHOAMI);
        chip = t4_get_chip_type(adapter,
                        CHELSIO_PCI_ID_VER(adapter->pdev->id.device_id));
        if (chip < 0)
                return chip;

        func = CHELSIO_CHIP_VERSION(chip) <= CHELSIO_T5 ?
               G_SOURCEPF(whoami) : G_T6_SOURCEPF(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);
                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->device = &adapter->pdev->device;
                pi->eth_dev->data->dev_private = pi;
                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, adapter->pdev);

                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_adapter_info(adapter);
        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;
}