/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2012-2013 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#include "net_driver.h"
#include "ef10_regs.h"
#include "io.h"
#include "mcdi.h"
#include "mcdi_pcol.h"
#include "nic.h"
#include "workarounds.h"
#include "selftest.h"
#include "ef10_sriov.h"
#include <linux/in.h>
#include <linux/jhash.h>
#include <linux/wait.h>
#include <linux/workqueue.h>

/* Hardware control for EF10 architecture including 'Huntington'. */

#define EFX_EF10_DRVGEN_EV              7
enum {
        EFX_EF10_TEST = 1,
        EFX_EF10_REFILL,
};

/* The reserved RSS context value */
#define EFX_EF10_RSS_CONTEXT_INVALID    0xffffffff
/* The maximum size of a shared RSS context */
/* TODO: this should really be from the mcdi protocol export */
#define EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE 64UL

/* The filter table(s) are managed by firmware and we have write-only
 * access.  When removing filters we must identify them to the
 * firmware by a 64-bit handle, but this is too wide for Linux kernel
 * interfaces (32-bit for RX NFC, 16-bit for RFS).  Also, we need to
 * be able to tell in advance whether a requested insertion will
 * replace an existing filter.  Therefore we maintain a software hash
 * table, which should be at least as large as the hardware hash
 * table.
 *
 * Huntington has a single 8K filter table shared between all filter
 * types and both ports.
 */
#define HUNT_FILTER_TBL_ROWS 8192

#define EFX_EF10_FILTER_ID_INVALID 0xffff

#define EFX_EF10_FILTER_DEV_UC_MAX      32
#define EFX_EF10_FILTER_DEV_MC_MAX      256

/* VLAN list entry */
struct efx_ef10_vlan {
        struct list_head list;
        u16 vid;
};

enum efx_ef10_default_filters {
        EFX_EF10_BCAST,
        EFX_EF10_UCDEF,
        EFX_EF10_MCDEF,
        EFX_EF10_VXLAN4_UCDEF,
        EFX_EF10_VXLAN4_MCDEF,
        EFX_EF10_VXLAN6_UCDEF,
        EFX_EF10_VXLAN6_MCDEF,
        EFX_EF10_NVGRE4_UCDEF,
        EFX_EF10_NVGRE4_MCDEF,
        EFX_EF10_NVGRE6_UCDEF,
        EFX_EF10_NVGRE6_MCDEF,
        EFX_EF10_GENEVE4_UCDEF,
        EFX_EF10_GENEVE4_MCDEF,
        EFX_EF10_GENEVE6_UCDEF,
        EFX_EF10_GENEVE6_MCDEF,

        EFX_EF10_NUM_DEFAULT_FILTERS
};

/* Per-VLAN filters information */
struct efx_ef10_filter_vlan {
        struct list_head list;
        u16 vid;
        u16 uc[EFX_EF10_FILTER_DEV_UC_MAX];
        u16 mc[EFX_EF10_FILTER_DEV_MC_MAX];
        u16 default_filters[EFX_EF10_NUM_DEFAULT_FILTERS];
};

struct efx_ef10_dev_addr {
        u8 addr[ETH_ALEN];
};

struct efx_ef10_filter_table {
/* The MCDI match masks supported by this fw & hw, in order of priority */
        u32 rx_match_mcdi_flags[
                MC_CMD_GET_PARSER_DISP_INFO_OUT_SUPPORTED_MATCHES_MAXNUM * 2];
        unsigned int rx_match_count;

        struct {
                unsigned long spec;     /* pointer to spec plus flag bits */
/* BUSY flag indicates that an update is in progress.  AUTO_OLD is
 * used to mark and sweep MAC filters for the device address lists.
 */
#define EFX_EF10_FILTER_FLAG_BUSY       1UL
#define EFX_EF10_FILTER_FLAG_AUTO_OLD   2UL
#define EFX_EF10_FILTER_FLAGS           3UL
                u64 handle;             /* firmware handle */
        } *entry;
        wait_queue_head_t waitq;
/* Shadow of net_device address lists, guarded by mac_lock */
        struct efx_ef10_dev_addr dev_uc_list[EFX_EF10_FILTER_DEV_UC_MAX];
        struct efx_ef10_dev_addr dev_mc_list[EFX_EF10_FILTER_DEV_MC_MAX];
        int dev_uc_count;
        int dev_mc_count;
        bool uc_promisc;
        bool mc_promisc;
/* Whether in multicast promiscuous mode when last changed */
        bool mc_promisc_last;
        bool mc_overflow; /* Too many MC addrs; should always imply mc_promisc */
        bool vlan_filter;
        struct list_head vlan_list;
};

/* An arbitrary search limit for the software hash table */
#define EFX_EF10_FILTER_SEARCH_LIMIT 200

static void efx_ef10_rx_free_indir_table(struct efx_nic *efx);
static void efx_ef10_filter_table_remove(struct efx_nic *efx);
static int efx_ef10_filter_add_vlan(struct efx_nic *efx, u16 vid);
static void efx_ef10_filter_del_vlan_internal(struct efx_nic *efx,
                                              struct efx_ef10_filter_vlan *vlan);
static void efx_ef10_filter_del_vlan(struct efx_nic *efx, u16 vid);
static int efx_ef10_set_udp_tnl_ports(struct efx_nic *efx, bool unloading);

static u32 efx_ef10_filter_get_unsafe_id(u32 filter_id)
{
        WARN_ON_ONCE(filter_id == EFX_EF10_FILTER_ID_INVALID);
        return filter_id & (HUNT_FILTER_TBL_ROWS - 1);
}

static unsigned int efx_ef10_filter_get_unsafe_pri(u32 filter_id)
{
        return filter_id / (HUNT_FILTER_TBL_ROWS * 2);
}

static u32 efx_ef10_make_filter_id(unsigned int pri, u16 idx)
{
        return pri * HUNT_FILTER_TBL_ROWS * 2 + idx;
}

static int efx_ef10_get_warm_boot_count(struct efx_nic *efx)
{
        efx_dword_t reg;

        efx_readd(efx, &reg, ER_DZ_BIU_MC_SFT_STATUS);
        return EFX_DWORD_FIELD(reg, EFX_WORD_1) == 0xb007 ?
                EFX_DWORD_FIELD(reg, EFX_WORD_0) : -EIO;
}

static unsigned int efx_ef10_mem_map_size(struct efx_nic *efx)
{
        int bar;

        bar = efx->type->mem_bar;
        return resource_size(&efx->pci_dev->resource[bar]);
}

static bool efx_ef10_is_vf(struct efx_nic *efx)
{
        return efx->type->is_vf;
}

static int efx_ef10_get_pf_index(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_FUNCTION_INFO_OUT_LEN);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        size_t outlen;
        int rc;

        rc = efx_mcdi_rpc(efx, MC_CMD_GET_FUNCTION_INFO, NULL, 0, outbuf,
                          sizeof(outbuf), &outlen);
        if (rc)
                return rc;
        if (outlen < sizeof(outbuf))
                return -EIO;

        nic_data->pf_index = MCDI_DWORD(outbuf, GET_FUNCTION_INFO_OUT_PF);
        return 0;
}

#ifdef CONFIG_SFC_SRIOV
static int efx_ef10_get_vf_index(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_FUNCTION_INFO_OUT_LEN);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        size_t outlen;
        int rc;

        rc = efx_mcdi_rpc(efx, MC_CMD_GET_FUNCTION_INFO, NULL, 0, outbuf,
                          sizeof(outbuf), &outlen);
        if (rc)
                return rc;
        if (outlen < sizeof(outbuf))
                return -EIO;

        nic_data->vf_index = MCDI_DWORD(outbuf, GET_FUNCTION_INFO_OUT_VF);
        return 0;
}
#endif

static int efx_ef10_init_datapath_caps(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_CAPABILITIES_V2_OUT_LEN);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        size_t outlen;
        int rc;

        BUILD_BUG_ON(MC_CMD_GET_CAPABILITIES_IN_LEN != 0);

        rc = efx_mcdi_rpc(efx, MC_CMD_GET_CAPABILITIES, NULL, 0,
                          outbuf, sizeof(outbuf), &outlen);
        if (rc)
                return rc;
        if (outlen < MC_CMD_GET_CAPABILITIES_OUT_LEN) {
                netif_err(efx, drv, efx->net_dev,
                          "unable to read datapath firmware capabilities\n");
                return -EIO;
        }

        nic_data->datapath_caps =
                MCDI_DWORD(outbuf, GET_CAPABILITIES_OUT_FLAGS1);

        if (outlen >= MC_CMD_GET_CAPABILITIES_V2_OUT_LEN) {
                nic_data->datapath_caps2 = MCDI_DWORD(outbuf,
                                GET_CAPABILITIES_V2_OUT_FLAGS2);
                nic_data->piobuf_size = MCDI_WORD(outbuf,
                                GET_CAPABILITIES_V2_OUT_SIZE_PIO_BUFF);
        } else {
                nic_data->datapath_caps2 = 0;
                nic_data->piobuf_size = ER_DZ_TX_PIOBUF_SIZE;
        }

        /* record the DPCPU firmware IDs to determine VEB vswitching support.
         */
        nic_data->rx_dpcpu_fw_id =
                MCDI_WORD(outbuf, GET_CAPABILITIES_OUT_RX_DPCPU_FW_ID);
        nic_data->tx_dpcpu_fw_id =
                MCDI_WORD(outbuf, GET_CAPABILITIES_OUT_TX_DPCPU_FW_ID);

        if (!(nic_data->datapath_caps &
              (1 << MC_CMD_GET_CAPABILITIES_OUT_RX_PREFIX_LEN_14_LBN))) {
                netif_err(efx, probe, efx->net_dev,
                          "current firmware does not support an RX prefix\n");
                return -ENODEV;
        }

        return 0;
}

static int efx_ef10_get_sysclk_freq(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_CLOCK_OUT_LEN);
        int rc;

        rc = efx_mcdi_rpc(efx, MC_CMD_GET_CLOCK, NULL, 0,
                          outbuf, sizeof(outbuf), NULL);
        if (rc)
                return rc;
        rc = MCDI_DWORD(outbuf, GET_CLOCK_OUT_SYS_FREQ);
        return rc > 0 ? rc : -ERANGE;
}

static int efx_ef10_get_timer_workarounds(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        unsigned int implemented;
        unsigned int enabled;
        int rc;

        nic_data->workaround_35388 = false;
        nic_data->workaround_61265 = false;

        rc = efx_mcdi_get_workarounds(efx, &implemented, &enabled);

        if (rc == -ENOSYS) {
                /* Firmware without GET_WORKAROUNDS - not a problem. */
                rc = 0;
        } else if (rc == 0) {
                /* Bug61265 workaround is always enabled if implemented. */
                if (enabled & MC_CMD_GET_WORKAROUNDS_OUT_BUG61265)
                        nic_data->workaround_61265 = true;

                if (enabled & MC_CMD_GET_WORKAROUNDS_OUT_BUG35388) {
                        nic_data->workaround_35388 = true;
                } else if (implemented & MC_CMD_GET_WORKAROUNDS_OUT_BUG35388) {
                        /* Workaround is implemented but not enabled.
                         * Try to enable it.
                         */
                        rc = efx_mcdi_set_workaround(efx,
                                                     MC_CMD_WORKAROUND_BUG35388,
                                                     true, NULL);
                        if (rc == 0)
                                nic_data->workaround_35388 = true;
                        /* If we failed to set the workaround just carry on. */
                        rc = 0;
                }
        }

        netif_dbg(efx, probe, efx->net_dev,
                  "workaround for bug 35388 is %sabled\n",
                  nic_data->workaround_35388 ? "en" : "dis");
        netif_dbg(efx, probe, efx->net_dev,
                  "workaround for bug 61265 is %sabled\n",
                  nic_data->workaround_61265 ? "en" : "dis");

        return rc;
}

static void efx_ef10_process_timer_config(struct efx_nic *efx,
                                          const efx_dword_t *data)
{
        unsigned int max_count;

        if (EFX_EF10_WORKAROUND_61265(efx)) {
                efx->timer_quantum_ns = MCDI_DWORD(data,
                        GET_EVQ_TMR_PROPERTIES_OUT_MCDI_TMR_STEP_NS);
                efx->timer_max_ns = MCDI_DWORD(data,
                        GET_EVQ_TMR_PROPERTIES_OUT_MCDI_TMR_MAX_NS);
        } else if (EFX_EF10_WORKAROUND_35388(efx)) {
                efx->timer_quantum_ns = MCDI_DWORD(data,
                        GET_EVQ_TMR_PROPERTIES_OUT_BUG35388_TMR_NS_PER_COUNT);
                max_count = MCDI_DWORD(data,
                        GET_EVQ_TMR_PROPERTIES_OUT_BUG35388_TMR_MAX_COUNT);
                efx->timer_max_ns = max_count * efx->timer_quantum_ns;
        } else {
                efx->timer_quantum_ns = MCDI_DWORD(data,
                        GET_EVQ_TMR_PROPERTIES_OUT_TMR_REG_NS_PER_COUNT);
                max_count = MCDI_DWORD(data,
                        GET_EVQ_TMR_PROPERTIES_OUT_TMR_REG_MAX_COUNT);
                efx->timer_max_ns = max_count * efx->timer_quantum_ns;
        }

        netif_dbg(efx, probe, efx->net_dev,
                  "got timer properties from MC: quantum %u ns; max %u ns\n",
                  efx->timer_quantum_ns, efx->timer_max_ns);
}

static int efx_ef10_get_timer_config(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_EVQ_TMR_PROPERTIES_OUT_LEN);
        int rc;

        rc = efx_ef10_get_timer_workarounds(efx);
        if (rc)
                return rc;

        rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_EVQ_TMR_PROPERTIES, NULL, 0,
                                outbuf, sizeof(outbuf), NULL);

        if (rc == 0) {
                efx_ef10_process_timer_config(efx, outbuf);
        } else if (rc == -ENOSYS || rc == -EPERM) {
                /* Not available - fall back to Huntington defaults. */
                unsigned int quantum;

                rc = efx_ef10_get_sysclk_freq(efx);
                if (rc < 0)
                        return rc;

                quantum = 1536000 / rc; /* 1536 cycles */
                efx->timer_quantum_ns = quantum;
                efx->timer_max_ns = efx->type->timer_period_max * quantum;
                rc = 0;
        } else {
                efx_mcdi_display_error(efx, MC_CMD_GET_EVQ_TMR_PROPERTIES,
                                       MC_CMD_GET_EVQ_TMR_PROPERTIES_OUT_LEN,
                                       NULL, 0, rc);
        }

        return rc;
}

static int efx_ef10_get_mac_address_pf(struct efx_nic *efx, u8 *mac_address)
{
        MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_MAC_ADDRESSES_OUT_LEN);
        size_t outlen;
        int rc;

        BUILD_BUG_ON(MC_CMD_GET_MAC_ADDRESSES_IN_LEN != 0);

        rc = efx_mcdi_rpc(efx, MC_CMD_GET_MAC_ADDRESSES, NULL, 0,
                          outbuf, sizeof(outbuf), &outlen);
        if (rc)
                return rc;
        if (outlen < MC_CMD_GET_MAC_ADDRESSES_OUT_LEN)
                return -EIO;

        ether_addr_copy(mac_address,
                        MCDI_PTR(outbuf, GET_MAC_ADDRESSES_OUT_MAC_ADDR_BASE));
        return 0;
}

static int efx_ef10_get_mac_address_vf(struct efx_nic *efx, u8 *mac_address)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_GET_MAC_ADDRESSES_IN_LEN);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_VPORT_GET_MAC_ADDRESSES_OUT_LENMAX);
        size_t outlen;
        int num_addrs, rc;

        MCDI_SET_DWORD(inbuf, VPORT_GET_MAC_ADDRESSES_IN_VPORT_ID,
                       EVB_PORT_ID_ASSIGNED);
        rc = efx_mcdi_rpc(efx, MC_CMD_VPORT_GET_MAC_ADDRESSES, inbuf,
                          sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);

        if (rc)
                return rc;
        if (outlen < MC_CMD_VPORT_GET_MAC_ADDRESSES_OUT_LENMIN)
                return -EIO;

        num_addrs = MCDI_DWORD(outbuf,
                               VPORT_GET_MAC_ADDRESSES_OUT_MACADDR_COUNT);

        WARN_ON(num_addrs != 1);

        ether_addr_copy(mac_address,
                        MCDI_PTR(outbuf, VPORT_GET_MAC_ADDRESSES_OUT_MACADDR));

        return 0;
}

static ssize_t efx_ef10_show_link_control_flag(struct device *dev,
                                               struct device_attribute *attr,
                                               char *buf)
{
        struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));

        return sprintf(buf, "%d\n",
                       ((efx->mcdi->fn_flags) &
                        (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_LINKCTRL))
                       ? 1 : 0);
}

static ssize_t efx_ef10_show_primary_flag(struct device *dev,
                                          struct device_attribute *attr,
                                          char *buf)
{
        struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));

        return sprintf(buf, "%d\n",
                       ((efx->mcdi->fn_flags) &
                        (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY))
                       ? 1 : 0);
}

static struct efx_ef10_vlan *efx_ef10_find_vlan(struct efx_nic *efx, u16 vid)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        struct efx_ef10_vlan *vlan;

        WARN_ON(!mutex_is_locked(&nic_data->vlan_lock));

        list_for_each_entry(vlan, &nic_data->vlan_list, list) {
                if (vlan->vid == vid)
                        return vlan;
        }

        return NULL;
}

static int efx_ef10_add_vlan(struct efx_nic *efx, u16 vid)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        struct efx_ef10_vlan *vlan;
        int rc;

        mutex_lock(&nic_data->vlan_lock);

        vlan = efx_ef10_find_vlan(efx, vid);
        if (vlan) {
                /* We add VID 0 on init. 8021q adds it on module init
                 * for all interfaces with VLAN filtring feature.
                 */
                if (vid == 0)
                        goto done_unlock;
                netif_warn(efx, drv, efx->net_dev,
                           "VLAN %u already added\n", vid);
                rc = -EALREADY;
                goto fail_exist;
        }

        rc = -ENOMEM;
        vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
        if (!vlan)
                goto fail_alloc;

        vlan->vid = vid;

        list_add_tail(&vlan->list, &nic_data->vlan_list);

        if (efx->filter_state) {
                mutex_lock(&efx->mac_lock);
                down_write(&efx->filter_sem);
                rc = efx_ef10_filter_add_vlan(efx, vlan->vid);
                up_write(&efx->filter_sem);
                mutex_unlock(&efx->mac_lock);
                if (rc)
                        goto fail_filter_add_vlan;
        }

done_unlock:
        mutex_unlock(&nic_data->vlan_lock);
        return 0;

fail_filter_add_vlan:
        list_del(&vlan->list);
        kfree(vlan);
fail_alloc:
fail_exist:
        mutex_unlock(&nic_data->vlan_lock);
        return rc;
}

static void efx_ef10_del_vlan_internal(struct efx_nic *efx,
                                       struct efx_ef10_vlan *vlan)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;

        WARN_ON(!mutex_is_locked(&nic_data->vlan_lock));

        if (efx->filter_state) {
                down_write(&efx->filter_sem);
                efx_ef10_filter_del_vlan(efx, vlan->vid);
                up_write(&efx->filter_sem);
        }

        list_del(&vlan->list);
        kfree(vlan);
}

static int efx_ef10_del_vlan(struct efx_nic *efx, u16 vid)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        struct efx_ef10_vlan *vlan;
        int rc = 0;

        /* 8021q removes VID 0 on module unload for all interfaces
         * with VLAN filtering feature. We need to keep it to receive
         * untagged traffic.
         */
        if (vid == 0)
                return 0;

        mutex_lock(&nic_data->vlan_lock);

        vlan = efx_ef10_find_vlan(efx, vid);
        if (!vlan) {
                netif_err(efx, drv, efx->net_dev,
                          "VLAN %u to be deleted not found\n", vid);
                rc = -ENOENT;
        } else {
                efx_ef10_del_vlan_internal(efx, vlan);
        }

        mutex_unlock(&nic_data->vlan_lock);

        return rc;
}

static void efx_ef10_cleanup_vlans(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        struct efx_ef10_vlan *vlan, *next_vlan;

        mutex_lock(&nic_data->vlan_lock);
        list_for_each_entry_safe(vlan, next_vlan, &nic_data->vlan_list, list)
                efx_ef10_del_vlan_internal(efx, vlan);
        mutex_unlock(&nic_data->vlan_lock);
}

static DEVICE_ATTR(link_control_flag, 0444, efx_ef10_show_link_control_flag,
                   NULL);
static DEVICE_ATTR(primary_flag, 0444, efx_ef10_show_primary_flag, NULL);

static int efx_ef10_probe(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data;
        int i, rc;

        /* We can have one VI for each 8K region.  However, until we
         * use TX option descriptors we need two TX queues per channel.
         */
        efx->max_channels = min_t(unsigned int,
                                  EFX_MAX_CHANNELS,
                                  efx_ef10_mem_map_size(efx) /
                                  (EFX_VI_PAGE_SIZE * EFX_TXQ_TYPES));
        efx->max_tx_channels = efx->max_channels;
        if (WARN_ON(efx->max_channels == 0))
                return -EIO;

        nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL);
        if (!nic_data)
                return -ENOMEM;
        efx->nic_data = nic_data;

        /* we assume later that we can copy from this buffer in dwords */
        BUILD_BUG_ON(MCDI_CTL_SDU_LEN_MAX_V2 % 4);

        rc = efx_nic_alloc_buffer(efx, &nic_data->mcdi_buf,
                                  8 + MCDI_CTL_SDU_LEN_MAX_V2, GFP_KERNEL);
        if (rc)
                goto fail1;

        /* Get the MC's warm boot count.  In case it's rebooting right
         * now, be prepared to retry.
         */
        i = 0;
        for (;;) {
                rc = efx_ef10_get_warm_boot_count(efx);
                if (rc >= 0)
                        break;
                if (++i == 5)
                        goto fail2;
                ssleep(1);
        }
        nic_data->warm_boot_count = rc;

        nic_data->rx_rss_context = EFX_EF10_RSS_CONTEXT_INVALID;

        nic_data->vport_id = EVB_PORT_ID_ASSIGNED;

        /* In case we're recovering from a crash (kexec), we want to
         * cancel any outstanding request by the previous user of this
         * function.  We send a special message using the least
         * significant bits of the 'high' (doorbell) register.
         */
        _efx_writed(efx, cpu_to_le32(1), ER_DZ_MC_DB_HWRD);

        rc = efx_mcdi_init(efx);
        if (rc)
                goto fail2;

        mutex_init(&nic_data->udp_tunnels_lock);

        /* Reset (most) configuration for this function */
        rc = efx_mcdi_reset(efx, RESET_TYPE_ALL);
        if (rc)
                goto fail3;

        /* Enable event logging */
        rc = efx_mcdi_log_ctrl(efx, true, false, 0);
        if (rc)
                goto fail3;

        rc = device_create_file(&efx->pci_dev->dev,
                                &dev_attr_link_control_flag);
        if (rc)
                goto fail3;

        rc = device_create_file(&efx->pci_dev->dev, &dev_attr_primary_flag);
        if (rc)
                goto fail4;

        rc = efx_ef10_get_pf_index(efx);
        if (rc)
                goto fail5;

        rc = efx_ef10_init_datapath_caps(efx);
        if (rc < 0)
                goto fail5;

        efx->rx_packet_len_offset =
                ES_DZ_RX_PREFIX_PKTLEN_OFST - ES_DZ_RX_PREFIX_SIZE;

        rc = efx_mcdi_port_get_number(efx);
        if (rc < 0)
                goto fail5;
        efx->port_num = rc;

        rc = efx->type->get_mac_address(efx, efx->net_dev->perm_addr);
        if (rc)
                goto fail5;

        rc = efx_ef10_get_timer_config(efx);
        if (rc < 0)
                goto fail5;

        rc = efx_mcdi_mon_probe(efx);
        if (rc && rc != -EPERM)
                goto fail5;

        efx_ptp_probe(efx, NULL);

#ifdef CONFIG_SFC_SRIOV
        if ((efx->pci_dev->physfn) && (!efx->pci_dev->is_physfn)) {
                struct pci_dev *pci_dev_pf = efx->pci_dev->physfn;
                struct efx_nic *efx_pf = pci_get_drvdata(pci_dev_pf);

                efx_pf->type->get_mac_address(efx_pf, nic_data->port_id);
        } else
#endif
                ether_addr_copy(nic_data->port_id, efx->net_dev->perm_addr);

        INIT_LIST_HEAD(&nic_data->vlan_list);
        mutex_init(&nic_data->vlan_lock);

        /* Add unspecified VID to support VLAN filtering being disabled */
        rc = efx_ef10_add_vlan(efx, EFX_FILTER_VID_UNSPEC);
        if (rc)
                goto fail_add_vid_unspec;

        /* If VLAN filtering is enabled, we need VID 0 to get untagged
         * traffic.  It is added automatically if 8021q module is loaded,
         * but we can't rely on it since module may be not loaded.
         */
        rc = efx_ef10_add_vlan(efx, 0);
        if (rc)
                goto fail_add_vid_0;

        return 0;

fail_add_vid_0:
        efx_ef10_cleanup_vlans(efx);
fail_add_vid_unspec:
        mutex_destroy(&nic_data->vlan_lock);
        efx_ptp_remove(efx);
        efx_mcdi_mon_remove(efx);
fail5:
        device_remove_file(&efx->pci_dev->dev, &dev_attr_primary_flag);
fail4:
        device_remove_file(&efx->pci_dev->dev, &dev_attr_link_control_flag);
fail3:
        efx_mcdi_detach(efx);

        mutex_lock(&nic_data->udp_tunnels_lock);
        memset(nic_data->udp_tunnels, 0, sizeof(nic_data->udp_tunnels));
        (void)efx_ef10_set_udp_tnl_ports(efx, true);
        mutex_unlock(&nic_data->udp_tunnels_lock);
        mutex_destroy(&nic_data->udp_tunnels_lock);

        efx_mcdi_fini(efx);
fail2:
        efx_nic_free_buffer(efx, &nic_data->mcdi_buf);
fail1:
        kfree(nic_data);
        efx->nic_data = NULL;
        return rc;
}

static int efx_ef10_free_vis(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF_ERR(outbuf);
        size_t outlen;
        int rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FREE_VIS, NULL, 0,
                                    outbuf, sizeof(outbuf), &outlen);

        /* -EALREADY means nothing to free, so ignore */
        if (rc == -EALREADY)
                rc = 0;
        if (rc)
                efx_mcdi_display_error(efx, MC_CMD_FREE_VIS, 0, outbuf, outlen,
                                       rc);
        return rc;
}

#ifdef EFX_USE_PIO

static void efx_ef10_free_piobufs(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FREE_PIOBUF_IN_LEN);
        unsigned int i;
        int rc;

        BUILD_BUG_ON(MC_CMD_FREE_PIOBUF_OUT_LEN != 0);

        for (i = 0; i < nic_data->n_piobufs; i++) {
                MCDI_SET_DWORD(inbuf, FREE_PIOBUF_IN_PIOBUF_HANDLE,
                               nic_data->piobuf_handle[i]);
                rc = efx_mcdi_rpc(efx, MC_CMD_FREE_PIOBUF, inbuf, sizeof(inbuf),
                                  NULL, 0, NULL);
                WARN_ON(rc);
        }

        nic_data->n_piobufs = 0;
}

static int efx_ef10_alloc_piobufs(struct efx_nic *efx, unsigned int n)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        MCDI_DECLARE_BUF(outbuf, MC_CMD_ALLOC_PIOBUF_OUT_LEN);
        unsigned int i;
        size_t outlen;
        int rc = 0;

        BUILD_BUG_ON(MC_CMD_ALLOC_PIOBUF_IN_LEN != 0);

        for (i = 0; i < n; i++) {
                rc = efx_mcdi_rpc_quiet(efx, MC_CMD_ALLOC_PIOBUF, NULL, 0,
                                        outbuf, sizeof(outbuf), &outlen);
                if (rc) {
                        /* Don't display the MC error if we didn't have space
                         * for a VF.
                         */
                        if (!(efx_ef10_is_vf(efx) && rc == -ENOSPC))
                                efx_mcdi_display_error(efx, MC_CMD_ALLOC_PIOBUF,
                                                       0, outbuf, outlen, rc);
                        break;
                }
                if (outlen < MC_CMD_ALLOC_PIOBUF_OUT_LEN) {
                        rc = -EIO;
                        break;
                }
                nic_data->piobuf_handle[i] =
                        MCDI_DWORD(outbuf, ALLOC_PIOBUF_OUT_PIOBUF_HANDLE);
                netif_dbg(efx, probe, efx->net_dev,
                          "allocated PIO buffer %u handle %x\n", i,
                          nic_data->piobuf_handle[i]);
        }

        nic_data->n_piobufs = i;
        if (rc)
                efx_ef10_free_piobufs(efx);
        return rc;
}

static int efx_ef10_link_piobufs(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_LINK_PIOBUF_IN_LEN);
        struct efx_channel *channel;
        struct efx_tx_queue *tx_queue;
        unsigned int offset, index;
        int rc;

        BUILD_BUG_ON(MC_CMD_LINK_PIOBUF_OUT_LEN != 0);
        BUILD_BUG_ON(MC_CMD_UNLINK_PIOBUF_OUT_LEN != 0);

        /* Link a buffer to each VI in the write-combining mapping */
        for (index = 0; index < nic_data->n_piobufs; ++index) {
                MCDI_SET_DWORD(inbuf, LINK_PIOBUF_IN_PIOBUF_HANDLE,
                               nic_data->piobuf_handle[index]);
                MCDI_SET_DWORD(inbuf, LINK_PIOBUF_IN_TXQ_INSTANCE,
                               nic_data->pio_write_vi_base + index);
                rc = efx_mcdi_rpc(efx, MC_CMD_LINK_PIOBUF,
                                  inbuf, MC_CMD_LINK_PIOBUF_IN_LEN,
                                  NULL, 0, NULL);
                if (rc) {
                        netif_err(efx, drv, efx->net_dev,
                                  "failed to link VI %u to PIO buffer %u (%d)\n",
                                  nic_data->pio_write_vi_base + index, index,
                                  rc);
                        goto fail;
                }
                netif_dbg(efx, probe, efx->net_dev,
                          "linked VI %u to PIO buffer %u\n",
                          nic_data->pio_write_vi_base + index, index);
        }

        /* Link a buffer to each TX queue */
        efx_for_each_channel(channel, efx) {
                efx_for_each_channel_tx_queue(tx_queue, channel) {
                        /* We assign the PIO buffers to queues in
                         * reverse order to allow for the following
                         * special case.
                         */
                        offset = ((efx->tx_channel_offset + efx->n_tx_channels -
                                   tx_queue->channel->channel - 1) *
                                  efx_piobuf_size);
                        index = offset / nic_data->piobuf_size;
                        offset = offset % nic_data->piobuf_size;

                        /* When the host page size is 4K, the first
                         * host page in the WC mapping may be within
                         * the same VI page as the last TX queue.  We
                         * can only link one buffer to each VI.
                         */
                        if (tx_queue->queue == nic_data->pio_write_vi_base) {
                                BUG_ON(index != 0);
                                rc = 0;
                        } else {
                                MCDI_SET_DWORD(inbuf,
                                               LINK_PIOBUF_IN_PIOBUF_HANDLE,
                                               nic_data->piobuf_handle[index]);
                                MCDI_SET_DWORD(inbuf,
                                               LINK_PIOBUF_IN_TXQ_INSTANCE,
                                               tx_queue->queue);
                                rc = efx_mcdi_rpc(efx, MC_CMD_LINK_PIOBUF,
                                                  inbuf, MC_CMD_LINK_PIOBUF_IN_LEN,
                                                  NULL, 0, NULL);
                        }

                        if (rc) {
                                /* This is non-fatal; the TX path just
                                 * won't use PIO for this queue
                                 */
                                netif_err(efx, drv, efx->net_dev,
                                          "failed to link VI %u to PIO buffer %u (%d)\n",
                                          tx_queue->queue, index, rc);
                                tx_queue->piobuf = NULL;
                        } else {
                                tx_queue->piobuf =
                                        nic_data->pio_write_base +
                                        index * EFX_VI_PAGE_SIZE + offset;
                                tx_queue->piobuf_offset = offset;
                                netif_dbg(efx, probe, efx->net_dev,
                                          "linked VI %u to PIO buffer %u offset %x addr %p\n",
                                          tx_queue->queue, index,
                                          tx_queue->piobuf_offset,
                                          tx_queue->piobuf);
                        }
                }
        }

        return 0;

fail:
        /* inbuf was defined for MC_CMD_LINK_PIOBUF.  We can use the same
         * buffer for MC_CMD_UNLINK_PIOBUF because it's shorter.
         */
        BUILD_BUG_ON(MC_CMD_LINK_PIOBUF_IN_LEN < MC_CMD_UNLINK_PIOBUF_IN_LEN);
        while (index--) {
                MCDI_SET_DWORD(inbuf, UNLINK_PIOBUF_IN_TXQ_INSTANCE,
                               nic_data->pio_write_vi_base + index);
                efx_mcdi_rpc(efx, MC_CMD_UNLINK_PIOBUF,
                             inbuf, MC_CMD_UNLINK_PIOBUF_IN_LEN,
                             NULL, 0, NULL);
        }
        return rc;
}

static void efx_ef10_forget_old_piobufs(struct efx_nic *efx)
{
        struct efx_channel *channel;
        struct efx_tx_queue *tx_queue;

        /* All our existing PIO buffers went away */
        efx_for_each_channel(channel, efx)
                efx_for_each_channel_tx_queue(tx_queue, channel)
                        tx_queue->piobuf = NULL;
}

#else /* !EFX_USE_PIO */

static int efx_ef10_alloc_piobufs(struct efx_nic *efx, unsigned int n)
{
        return n == 0 ? 0 : -ENOBUFS;
}

static int efx_ef10_link_piobufs(struct efx_nic *efx)
{
        return 0;
}

static void efx_ef10_free_piobufs(struct efx_nic *efx)
{
}

static void efx_ef10_forget_old_piobufs(struct efx_nic *efx)
{
}

#endif /* EFX_USE_PIO */

static void efx_ef10_remove(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        int rc;

#ifdef CONFIG_SFC_SRIOV
        struct efx_ef10_nic_data *nic_data_pf;
        struct pci_dev *pci_dev_pf;
        struct efx_nic *efx_pf;
        struct ef10_vf *vf;

        if (efx->pci_dev->is_virtfn) {
                pci_dev_pf = efx->pci_dev->physfn;
                if (pci_dev_pf) {
                        efx_pf = pci_get_drvdata(pci_dev_pf);
                        nic_data_pf = efx_pf->nic_data;
                        vf = nic_data_pf->vf + nic_data->vf_index;
                        vf->efx = NULL;
                } else
                        netif_info(efx, drv, efx->net_dev,
                                   "Could not get the PF id from VF\n");
        }
#endif

        efx_ef10_cleanup_vlans(efx);
        mutex_destroy(&nic_data->vlan_lock);

        efx_ptp_remove(efx);

        efx_mcdi_mon_remove(efx);

        efx_ef10_rx_free_indir_table(efx);

        if (nic_data->wc_membase)

                iounmap(nic_data->wc_membase);

        rc = efx_ef10_free_vis(efx);
        WARN_ON(rc != 0);

        if (!nic_data->must_restore_piobufs)
                efx_ef10_free_piobufs(efx);

        device_remove_file(&efx->pci_dev->dev, &dev_attr_primary_flag);
        device_remove_file(&efx->pci_dev->dev, &dev_attr_link_control_flag);

        efx_mcdi_detach(efx);

        memset(nic_data->udp_tunnels, 0, sizeof(nic_data->udp_tunnels));
        mutex_lock(&nic_data->udp_tunnels_lock);
        (void)efx_ef10_set_udp_tnl_ports(efx, true);
        mutex_unlock(&nic_data->udp_tunnels_lock);

        mutex_destroy(&nic_data->udp_tunnels_lock);

        efx_mcdi_fini(efx);
        efx_nic_free_buffer(efx, &nic_data->mcdi_buf);
        kfree(nic_data);
}

static int efx_ef10_probe_pf(struct efx_nic *efx)
{
        return efx_ef10_probe(efx);
}

int efx_ef10_vadaptor_query(struct efx_nic *efx, unsigned int port_id,
                            u32 *port_flags, u32 *vadaptor_flags,
                            unsigned int *vlan_tags)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_QUERY_IN_LEN);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_VADAPTOR_QUERY_OUT_LEN);
        size_t outlen;
        int rc;

        if (nic_data->datapath_caps &
            (1 << MC_CMD_GET_CAPABILITIES_OUT_VADAPTOR_QUERY_LBN)) {
                MCDI_SET_DWORD(inbuf, VADAPTOR_QUERY_IN_UPSTREAM_PORT_ID,
                               port_id);

                rc = efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_QUERY, inbuf, sizeof(inbuf),
                                  outbuf, sizeof(outbuf), &outlen);
                if (rc)
                        return rc;

                if (outlen < sizeof(outbuf)) {
                        rc = -EIO;
                        return rc;
                }
        }

        if (port_flags)
                *port_flags = MCDI_DWORD(outbuf, VADAPTOR_QUERY_OUT_PORT_FLAGS);
        if (vadaptor_flags)
                *vadaptor_flags =
                        MCDI_DWORD(outbuf, VADAPTOR_QUERY_OUT_VADAPTOR_FLAGS);
        if (vlan_tags)
                *vlan_tags =
                        MCDI_DWORD(outbuf,
                                   VADAPTOR_QUERY_OUT_NUM_AVAILABLE_VLAN_TAGS);

        return 0;
}

int efx_ef10_vadaptor_alloc(struct efx_nic *efx, unsigned int port_id)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_ALLOC_IN_LEN);

        MCDI_SET_DWORD(inbuf, VADAPTOR_ALLOC_IN_UPSTREAM_PORT_ID, port_id);
        return efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_ALLOC, inbuf, sizeof(inbuf),
                            NULL, 0, NULL);
}

int efx_ef10_vadaptor_free(struct efx_nic *efx, unsigned int port_id)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_VADAPTOR_FREE_IN_LEN);

        MCDI_SET_DWORD(inbuf, VADAPTOR_FREE_IN_UPSTREAM_PORT_ID, port_id);
        return efx_mcdi_rpc(efx, MC_CMD_VADAPTOR_FREE, inbuf, sizeof(inbuf),
                            NULL, 0, NULL);
}

int efx_ef10_vport_add_mac(struct efx_nic *efx,
                           unsigned int port_id, u8 *mac)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_ADD_MAC_ADDRESS_IN_LEN);

        MCDI_SET_DWORD(inbuf, VPORT_ADD_MAC_ADDRESS_IN_VPORT_ID, port_id);
        ether_addr_copy(MCDI_PTR(inbuf, VPORT_ADD_MAC_ADDRESS_IN_MACADDR), mac);

        return efx_mcdi_rpc(efx, MC_CMD_VPORT_ADD_MAC_ADDRESS, inbuf,
                            sizeof(inbuf), NULL, 0, NULL);
}

int efx_ef10_vport_del_mac(struct efx_nic *efx,
                           unsigned int port_id, u8 *mac)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_DEL_MAC_ADDRESS_IN_LEN);

        MCDI_SET_DWORD(inbuf, VPORT_DEL_MAC_ADDRESS_IN_VPORT_ID, port_id);
        ether_addr_copy(MCDI_PTR(inbuf, VPORT_DEL_MAC_ADDRESS_IN_MACADDR), mac);

        return efx_mcdi_rpc(efx, MC_CMD_VPORT_DEL_MAC_ADDRESS, inbuf,
                            sizeof(inbuf), NULL, 0, NULL);
}

#ifdef CONFIG_SFC_SRIOV
static int efx_ef10_probe_vf(struct efx_nic *efx)
{
        int rc;
        struct pci_dev *pci_dev_pf;

        /* If the parent PF has no VF data structure, it doesn't know about this
         * VF so fail probe.  The VF needs to be re-created.  This can happen
         * if the PF driver is unloaded while the VF is assigned to a guest.
         */
        pci_dev_pf = efx->pci_dev->physfn;
        if (pci_dev_pf) {
                struct efx_nic *efx_pf = pci_get_drvdata(pci_dev_pf);
                struct efx_ef10_nic_data *nic_data_pf = efx_pf->nic_data;

                if (!nic_data_pf->vf) {
                        netif_info(efx, drv, efx->net_dev,
                                   "The VF cannot link to its parent PF; "
                                   "please destroy and re-create the VF\n");
                        return -EBUSY;
                }
        }

        rc = efx_ef10_probe(efx);
        if (rc)
                return rc;

        rc = efx_ef10_get_vf_index(efx);
        if (rc)
                goto fail;

        if (efx->pci_dev->is_virtfn) {
                if (efx->pci_dev->physfn) {
                        struct efx_nic *efx_pf =
                                pci_get_drvdata(efx->pci_dev->physfn);
                        struct efx_ef10_nic_data *nic_data_p = efx_pf->nic_data;
                        struct efx_ef10_nic_data *nic_data = efx->nic_data;

                        nic_data_p->vf[nic_data->vf_index].efx = efx;
                        nic_data_p->vf[nic_data->vf_index].pci_dev =
                                efx->pci_dev;
                } else
                        netif_info(efx, drv, efx->net_dev,
                                   "Could not get the PF id from VF\n");
        }

        return 0;

fail:
        efx_ef10_remove(efx);
        return rc;
}
#else
static int efx_ef10_probe_vf(struct efx_nic *efx __attribute__ ((unused)))
{
        return 0;
}
#endif

static int efx_ef10_alloc_vis(struct efx_nic *efx,
                              unsigned int min_vis, unsigned int max_vis)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_ALLOC_VIS_IN_LEN);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_ALLOC_VIS_OUT_LEN);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        size_t outlen;
        int rc;

        MCDI_SET_DWORD(inbuf, ALLOC_VIS_IN_MIN_VI_COUNT, min_vis);
        MCDI_SET_DWORD(inbuf, ALLOC_VIS_IN_MAX_VI_COUNT, max_vis);
        rc = efx_mcdi_rpc(efx, MC_CMD_ALLOC_VIS, inbuf, sizeof(inbuf),
                          outbuf, sizeof(outbuf), &outlen);
        if (rc != 0)
                return rc;

        if (outlen < MC_CMD_ALLOC_VIS_OUT_LEN)
                return -EIO;

        netif_dbg(efx, drv, efx->net_dev, "base VI is A0x%03x\n",
                  MCDI_DWORD(outbuf, ALLOC_VIS_OUT_VI_BASE));

        nic_data->vi_base = MCDI_DWORD(outbuf, ALLOC_VIS_OUT_VI_BASE);
        nic_data->n_allocated_vis = MCDI_DWORD(outbuf, ALLOC_VIS_OUT_VI_COUNT);
        return 0;
}

/* Note that the failure path of this function does not free
 * resources, as this will be done by efx_ef10_remove().
 */
static int efx_ef10_dimension_resources(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        unsigned int uc_mem_map_size, wc_mem_map_size;
        unsigned int min_vis = max(EFX_TXQ_TYPES,
                                   efx_separate_tx_channels ? 2 : 1);
        unsigned int channel_vis, pio_write_vi_base, max_vis;
        void __iomem *membase;
        int rc;

        channel_vis = max(efx->n_channels, efx->n_tx_channels * EFX_TXQ_TYPES);

#ifdef EFX_USE_PIO
        /* Try to allocate PIO buffers if wanted and if the full
         * number of PIO buffers would be sufficient to allocate one
         * copy-buffer per TX channel.  Failure is non-fatal, as there
         * are only a small number of PIO buffers shared between all
         * functions of the controller.
         */
        if (efx_piobuf_size != 0 &&
            nic_data->piobuf_size / efx_piobuf_size * EF10_TX_PIOBUF_COUNT >=
            efx->n_tx_channels) {
                unsigned int n_piobufs =
                        DIV_ROUND_UP(efx->n_tx_channels,
                                     nic_data->piobuf_size / efx_piobuf_size);

                rc = efx_ef10_alloc_piobufs(efx, n_piobufs);
                if (rc == -ENOSPC)
                        netif_dbg(efx, probe, efx->net_dev,
                                  "out of PIO buffers; cannot allocate more\n");
                else if (rc == -EPERM)
                        netif_dbg(efx, probe, efx->net_dev,
                                  "not permitted to allocate PIO buffers\n");
                else if (rc)
                        netif_err(efx, probe, efx->net_dev,
                                  "failed to allocate PIO buffers (%d)\n", rc);
                else
                        netif_dbg(efx, probe, efx->net_dev,
                                  "allocated %u PIO buffers\n", n_piobufs);
        }
#else
        nic_data->n_piobufs = 0;
#endif

        /* PIO buffers should be mapped with write-combining enabled,
         * and we want to make single UC and WC mappings rather than
         * several of each (in fact that's the only option if host
         * page size is >4K).  So we may allocate some extra VIs just
         * for writing PIO buffers through.
         *
         * The UC mapping contains (channel_vis - 1) complete VIs and the
         * first half of the next VI.  Then the WC mapping begins with
         * the second half of this last VI.
         */
        uc_mem_map_size = PAGE_ALIGN((channel_vis - 1) * EFX_VI_PAGE_SIZE +
                                     ER_DZ_TX_PIOBUF);
        if (nic_data->n_piobufs) {
                /* pio_write_vi_base rounds down to give the number of complete
                 * VIs inside the UC mapping.
                 */
                pio_write_vi_base = uc_mem_map_size / EFX_VI_PAGE_SIZE;
                wc_mem_map_size = (PAGE_ALIGN((pio_write_vi_base +
                                               nic_data->n_piobufs) *
                                              EFX_VI_PAGE_SIZE) -
                                   uc_mem_map_size);
                max_vis = pio_write_vi_base + nic_data->n_piobufs;
        } else {
                pio_write_vi_base = 0;
                wc_mem_map_size = 0;
                max_vis = channel_vis;
        }

        /* In case the last attached driver failed to free VIs, do it now */
        rc = efx_ef10_free_vis(efx);
        if (rc != 0)
                return rc;

        rc = efx_ef10_alloc_vis(efx, min_vis, max_vis);
        if (rc != 0)
                return rc;

        if (nic_data->n_allocated_vis < channel_vis) {
                netif_info(efx, drv, efx->net_dev,
                           "Could not allocate enough VIs to satisfy RSS"
                           " requirements. Performance may not be optimal.\n");
                /* We didn't get the VIs to populate our channels.
                 * We could keep what we got but then we'd have more
                 * interrupts than we need.
                 * Instead calculate new max_channels and restart
                 */
                efx->max_channels = nic_data->n_allocated_vis;
                efx->max_tx_channels =
                        nic_data->n_allocated_vis / EFX_TXQ_TYPES;

                efx_ef10_free_vis(efx);
                return -EAGAIN;
        }

        /* If we didn't get enough VIs to map all the PIO buffers, free the
         * PIO buffers
         */
        if (nic_data->n_piobufs &&
            nic_data->n_allocated_vis <
            pio_write_vi_base + nic_data->n_piobufs) {
                netif_dbg(efx, probe, efx->net_dev,
                          "%u VIs are not sufficient to map %u PIO buffers\n",
                          nic_data->n_allocated_vis, nic_data->n_piobufs);
                efx_ef10_free_piobufs(efx);
        }

        /* Shrink the original UC mapping of the memory BAR */
        membase = ioremap_nocache(efx->membase_phys, uc_mem_map_size);
        if (!membase) {
                netif_err(efx, probe, efx->net_dev,
                          "could not shrink memory BAR to %x\n",
                          uc_mem_map_size);
                return -ENOMEM;
        }
        iounmap(efx->membase);
        efx->membase = membase;

        /* Set up the WC mapping if needed */
        if (wc_mem_map_size) {
                nic_data->wc_membase = ioremap_wc(efx->membase_phys +
                                                  uc_mem_map_size,
                                                  wc_mem_map_size);
                if (!nic_data->wc_membase) {
                        netif_err(efx, probe, efx->net_dev,
                                  "could not allocate WC mapping of size %x\n",
                                  wc_mem_map_size);
                        return -ENOMEM;
                }
                nic_data->pio_write_vi_base = pio_write_vi_base;
                nic_data->pio_write_base =
                        nic_data->wc_membase +
                        (pio_write_vi_base * EFX_VI_PAGE_SIZE + ER_DZ_TX_PIOBUF -
                         uc_mem_map_size);

                rc = efx_ef10_link_piobufs(efx);
                if (rc)
                        efx_ef10_free_piobufs(efx);
        }

        netif_dbg(efx, probe, efx->net_dev,
                  "memory BAR at %pa (virtual %p+%x UC, %p+%x WC)\n",
                  &efx->membase_phys, efx->membase, uc_mem_map_size,
                  nic_data->wc_membase, wc_mem_map_size);

        return 0;
}

static int efx_ef10_init_nic(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        int rc;

        if (nic_data->must_check_datapath_caps) {
                rc = efx_ef10_init_datapath_caps(efx);
                if (rc)
                        return rc;
                nic_data->must_check_datapath_caps = false;
        }

        if (nic_data->must_realloc_vis) {
                /* We cannot let the number of VIs change now */
                rc = efx_ef10_alloc_vis(efx, nic_data->n_allocated_vis,
                                        nic_data->n_allocated_vis);
                if (rc)
                        return rc;
                nic_data->must_realloc_vis = false;
        }

        if (nic_data->must_restore_piobufs && nic_data->n_piobufs) {
                rc = efx_ef10_alloc_piobufs(efx, nic_data->n_piobufs);
                if (rc == 0) {
                        rc = efx_ef10_link_piobufs(efx);
                        if (rc)
                                efx_ef10_free_piobufs(efx);
                }

                /* Log an error on failure, but this is non-fatal.
                 * Permission errors are less important - we've presumably
                 * had the PIO buffer licence removed.
                 */
                if (rc == -EPERM)
                        netif_dbg(efx, drv, efx->net_dev,
                                  "not permitted to restore PIO buffers\n");
                else if (rc)
                        netif_err(efx, drv, efx->net_dev,
                                  "failed to restore PIO buffers (%d)\n", rc);
                nic_data->must_restore_piobufs = false;
        }

        /* don't fail init if RSS setup doesn't work */
        rc = efx->type->rx_push_rss_config(efx, false, efx->rx_indir_table, NULL);
        efx->rss_active = (rc == 0);

        return 0;
}

static void efx_ef10_reset_mc_allocations(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
#ifdef CONFIG_SFC_SRIOV
        unsigned int i;
#endif

        /* All our allocations have been reset */
        nic_data->must_realloc_vis = true;
        nic_data->must_restore_filters = true;
        nic_data->must_restore_piobufs = true;
        efx_ef10_forget_old_piobufs(efx);
        nic_data->rx_rss_context = EFX_EF10_RSS_CONTEXT_INVALID;

        /* Driver-created vswitches and vports must be re-created */
        nic_data->must_probe_vswitching = true;
        nic_data->vport_id = EVB_PORT_ID_ASSIGNED;
#ifdef CONFIG_SFC_SRIOV
        if (nic_data->vf)
                for (i = 0; i < efx->vf_count; i++)
                        nic_data->vf[i].vport_id = 0;
#endif
}

static enum reset_type efx_ef10_map_reset_reason(enum reset_type reason)
{
        if (reason == RESET_TYPE_MC_FAILURE)
                return RESET_TYPE_DATAPATH;

        return efx_mcdi_map_reset_reason(reason);
}

static int efx_ef10_map_reset_flags(u32 *flags)
{
        enum {
                EF10_RESET_PORT = ((ETH_RESET_MAC | ETH_RESET_PHY) <<
                                   ETH_RESET_SHARED_SHIFT),
                EF10_RESET_MC = ((ETH_RESET_DMA | ETH_RESET_FILTER |
                                  ETH_RESET_OFFLOAD | ETH_RESET_MAC |
                                  ETH_RESET_PHY | ETH_RESET_MGMT) <<
                                 ETH_RESET_SHARED_SHIFT)
        };

        /* We assume for now that our PCI function is permitted to
         * reset everything.
         */

        if ((*flags & EF10_RESET_MC) == EF10_RESET_MC) {
                *flags &= ~EF10_RESET_MC;
                return RESET_TYPE_WORLD;
        }

        if ((*flags & EF10_RESET_PORT) == EF10_RESET_PORT) {
                *flags &= ~EF10_RESET_PORT;
                return RESET_TYPE_ALL;
        }

        /* no invisible reset implemented */

        return -EINVAL;
}

static int efx_ef10_reset(struct efx_nic *efx, enum reset_type reset_type)
{
        int rc = efx_mcdi_reset(efx, reset_type);

        /* Unprivileged functions return -EPERM, but need to return success
         * here so that the datapath is brought back up.
         */
        if (reset_type == RESET_TYPE_WORLD && rc == -EPERM)
                rc = 0;

        /* If it was a port reset, trigger reallocation of MC resources.
         * Note that on an MC reset nothing needs to be done now because we'll
         * detect the MC reset later and handle it then.
         * For an FLR, we never get an MC reset event, but the MC has reset all
         * resources assigned to us, so we have to trigger reallocation now.
         */
        if ((reset_type == RESET_TYPE_ALL ||
             reset_type == RESET_TYPE_MCDI_TIMEOUT) && !rc)
                efx_ef10_reset_mc_allocations(efx);
        return rc;
}

#define EF10_DMA_STAT(ext_name, mcdi_name)                      \
        [EF10_STAT_ ## ext_name] =                              \
        { #ext_name, 64, 8 * MC_CMD_MAC_ ## mcdi_name }
#define EF10_DMA_INVIS_STAT(int_name, mcdi_name)                \
        [EF10_STAT_ ## int_name] =                              \
        { NULL, 64, 8 * MC_CMD_MAC_ ## mcdi_name }
#define EF10_OTHER_STAT(ext_name)                               \
        [EF10_STAT_ ## ext_name] = { #ext_name, 0, 0 }
#define GENERIC_SW_STAT(ext_name)                               \
        [GENERIC_STAT_ ## ext_name] = { #ext_name, 0, 0 }

static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
        EF10_DMA_STAT(port_tx_bytes, TX_BYTES),
        EF10_DMA_STAT(port_tx_packets, TX_PKTS),
        EF10_DMA_STAT(port_tx_pause, TX_PAUSE_PKTS),
        EF10_DMA_STAT(port_tx_control, TX_CONTROL_PKTS),
        EF10_DMA_STAT(port_tx_unicast, TX_UNICAST_PKTS),
        EF10_DMA_STAT(port_tx_multicast, TX_MULTICAST_PKTS),
        EF10_DMA_STAT(port_tx_broadcast, TX_BROADCAST_PKTS),
        EF10_DMA_STAT(port_tx_lt64, TX_LT64_PKTS),
        EF10_DMA_STAT(port_tx_64, TX_64_PKTS),
        EF10_DMA_STAT(port_tx_65_to_127, TX_65_TO_127_PKTS),
        EF10_DMA_STAT(port_tx_128_to_255, TX_128_TO_255_PKTS),
        EF10_DMA_STAT(port_tx_256_to_511, TX_256_TO_511_PKTS),
        EF10_DMA_STAT(port_tx_512_to_1023, TX_512_TO_1023_PKTS),
        EF10_DMA_STAT(port_tx_1024_to_15xx, TX_1024_TO_15XX_PKTS),
        EF10_DMA_STAT(port_tx_15xx_to_jumbo, TX_15XX_TO_JUMBO_PKTS),
        EF10_DMA_STAT(port_rx_bytes, RX_BYTES),
        EF10_DMA_INVIS_STAT(port_rx_bytes_minus_good_bytes, RX_BAD_BYTES),
        EF10_OTHER_STAT(port_rx_good_bytes),
        EF10_OTHER_STAT(port_rx_bad_bytes),
        EF10_DMA_STAT(port_rx_packets, RX_PKTS),
        EF10_DMA_STAT(port_rx_good, RX_GOOD_PKTS),
        EF10_DMA_STAT(port_rx_bad, RX_BAD_FCS_PKTS),
        EF10_DMA_STAT(port_rx_pause, RX_PAUSE_PKTS),
        EF10_DMA_STAT(port_rx_control, RX_CONTROL_PKTS),
        EF10_DMA_STAT(port_rx_unicast, RX_UNICAST_PKTS),
        EF10_DMA_STAT(port_rx_multicast, RX_MULTICAST_PKTS),
        EF10_DMA_STAT(port_rx_broadcast, RX_BROADCAST_PKTS),
        EF10_DMA_STAT(port_rx_lt64, RX_UNDERSIZE_PKTS),
        EF10_DMA_STAT(port_rx_64, RX_64_PKTS),
        EF10_DMA_STAT(port_rx_65_to_127, RX_65_TO_127_PKTS),
        EF10_DMA_STAT(port_rx_128_to_255, RX_128_TO_255_PKTS),
        EF10_DMA_STAT(port_rx_256_to_511, RX_256_TO_511_PKTS),
        EF10_DMA_STAT(port_rx_512_to_1023, RX_512_TO_1023_PKTS),
        EF10_DMA_STAT(port_rx_1024_to_15xx, RX_1024_TO_15XX_PKTS),
        EF10_DMA_STAT(port_rx_15xx_to_jumbo, RX_15XX_TO_JUMBO_PKTS),
        EF10_DMA_STAT(port_rx_gtjumbo, RX_GTJUMBO_PKTS),
        EF10_DMA_STAT(port_rx_bad_gtjumbo, RX_JABBER_PKTS),
        EF10_DMA_STAT(port_rx_overflow, RX_OVERFLOW_PKTS),
        EF10_DMA_STAT(port_rx_align_error, RX_ALIGN_ERROR_PKTS),
        EF10_DMA_STAT(port_rx_length_error, RX_LENGTH_ERROR_PKTS),
        EF10_DMA_STAT(port_rx_nodesc_drops, RX_NODESC_DROPS),
        GENERIC_SW_STAT(rx_nodesc_trunc),
        GENERIC_SW_STAT(rx_noskb_drops),
        EF10_DMA_STAT(port_rx_pm_trunc_bb_overflow, PM_TRUNC_BB_OVERFLOW),
        EF10_DMA_STAT(port_rx_pm_discard_bb_overflow, PM_DISCARD_BB_OVERFLOW),
        EF10_DMA_STAT(port_rx_pm_trunc_vfifo_full, PM_TRUNC_VFIFO_FULL),
        EF10_DMA_STAT(port_rx_pm_discard_vfifo_full, PM_DISCARD_VFIFO_FULL),
        EF10_DMA_STAT(port_rx_pm_trunc_qbb, PM_TRUNC_QBB),
        EF10_DMA_STAT(port_rx_pm_discard_qbb, PM_DISCARD_QBB),
        EF10_DMA_STAT(port_rx_pm_discard_mapping, PM_DISCARD_MAPPING),
        EF10_DMA_STAT(port_rx_dp_q_disabled_packets, RXDP_Q_DISABLED_PKTS),
        EF10_DMA_STAT(port_rx_dp_di_dropped_packets, RXDP_DI_DROPPED_PKTS),
        EF10_DMA_STAT(port_rx_dp_streaming_packets, RXDP_STREAMING_PKTS),
        EF10_DMA_STAT(port_rx_dp_hlb_fetch, RXDP_HLB_FETCH_CONDITIONS),
        EF10_DMA_STAT(port_rx_dp_hlb_wait, RXDP_HLB_WAIT_CONDITIONS),
        EF10_DMA_STAT(rx_unicast, VADAPTER_RX_UNICAST_PACKETS),
        EF10_DMA_STAT(rx_unicast_bytes, VADAPTER_RX_UNICAST_BYTES),
        EF10_DMA_STAT(rx_multicast, VADAPTER_RX_MULTICAST_PACKETS),
        EF10_DMA_STAT(rx_multicast_bytes, VADAPTER_RX_MULTICAST_BYTES),
        EF10_DMA_STAT(rx_broadcast, VADAPTER_RX_BROADCAST_PACKETS),
        EF10_DMA_STAT(rx_broadcast_bytes, VADAPTER_RX_BROADCAST_BYTES),
        EF10_DMA_STAT(rx_bad, VADAPTER_RX_BAD_PACKETS),
        EF10_DMA_STAT(rx_bad_bytes, VADAPTER_RX_BAD_BYTES),
        EF10_DMA_STAT(rx_overflow, VADAPTER_RX_OVERFLOW),
        EF10_DMA_STAT(tx_unicast, VADAPTER_TX_UNICAST_PACKETS),
        EF10_DMA_STAT(tx_unicast_bytes, VADAPTER_TX_UNICAST_BYTES),
        EF10_DMA_STAT(tx_multicast, VADAPTER_TX_MULTICAST_PACKETS),
        EF10_DMA_STAT(tx_multicast_bytes, VADAPTER_TX_MULTICAST_BYTES),
        EF10_DMA_STAT(tx_broadcast, VADAPTER_TX_BROADCAST_PACKETS),
        EF10_DMA_STAT(tx_broadcast_bytes, VADAPTER_TX_BROADCAST_BYTES),
        EF10_DMA_STAT(tx_bad, VADAPTER_TX_BAD_PACKETS),
        EF10_DMA_STAT(tx_bad_bytes, VADAPTER_TX_BAD_BYTES),
        EF10_DMA_STAT(tx_overflow, VADAPTER_TX_OVERFLOW),
};

#define HUNT_COMMON_STAT_MASK ((1ULL << EF10_STAT_port_tx_bytes) |      \
                               (1ULL << EF10_STAT_port_tx_packets) |    \
                               (1ULL << EF10_STAT_port_tx_pause) |      \
                               (1ULL << EF10_STAT_port_tx_unicast) |    \
                               (1ULL << EF10_STAT_port_tx_multicast) |  \
                               (1ULL << EF10_STAT_port_tx_broadcast) |  \
                               (1ULL << EF10_STAT_port_rx_bytes) |      \
                               (1ULL <<                                 \
                                EF10_STAT_port_rx_bytes_minus_good_bytes) | \
                               (1ULL << EF10_STAT_port_rx_good_bytes) | \
                               (1ULL << EF10_STAT_port_rx_bad_bytes) |  \
                               (1ULL << EF10_STAT_port_rx_packets) |    \
                               (1ULL << EF10_STAT_port_rx_good) |       \
                               (1ULL << EF10_STAT_port_rx_bad) |        \
                               (1ULL << EF10_STAT_port_rx_pause) |      \
                               (1ULL << EF10_STAT_port_rx_control) |    \
                               (1ULL << EF10_STAT_port_rx_unicast) |    \
                               (1ULL << EF10_STAT_port_rx_multicast) |  \
                               (1ULL << EF10_STAT_port_rx_broadcast) |  \
                               (1ULL << EF10_STAT_port_rx_lt64) |       \
                               (1ULL << EF10_STAT_port_rx_64) |         \
                               (1ULL << EF10_STAT_port_rx_65_to_127) |  \
                               (1ULL << EF10_STAT_port_rx_128_to_255) | \
                               (1ULL << EF10_STAT_port_rx_256_to_511) | \
                               (1ULL << EF10_STAT_port_rx_512_to_1023) |\
                               (1ULL << EF10_STAT_port_rx_1024_to_15xx) |\
                               (1ULL << EF10_STAT_port_rx_15xx_to_jumbo) |\
                               (1ULL << EF10_STAT_port_rx_gtjumbo) |    \
                               (1ULL << EF10_STAT_port_rx_bad_gtjumbo) |\
                               (1ULL << EF10_STAT_port_rx_overflow) |   \
                               (1ULL << EF10_STAT_port_rx_nodesc_drops) |\
                               (1ULL << GENERIC_STAT_rx_nodesc_trunc) | \
                               (1ULL << GENERIC_STAT_rx_noskb_drops))

/* On 7000 series NICs, these statistics are only provided by the 10G MAC.
 * For a 10G/40G switchable port we do not expose these because they might
 * not include all the packets they should.
 * On 8000 series NICs these statistics are always provided.
 */
#define HUNT_10G_ONLY_STAT_MASK ((1ULL << EF10_STAT_port_tx_control) |  \
                                 (1ULL << EF10_STAT_port_tx_lt64) |     \
                                 (1ULL << EF10_STAT_port_tx_64) |       \
                                 (1ULL << EF10_STAT_port_tx_65_to_127) |\
                                 (1ULL << EF10_STAT_port_tx_128_to_255) |\
                                 (1ULL << EF10_STAT_port_tx_256_to_511) |\
                                 (1ULL << EF10_STAT_port_tx_512_to_1023) |\
                                 (1ULL << EF10_STAT_port_tx_1024_to_15xx) |\
                                 (1ULL << EF10_STAT_port_tx_15xx_to_jumbo))

/* These statistics are only provided by the 40G MAC.  For a 10G/40G
 * switchable port we do expose these because the errors will otherwise
 * be silent.
 */
#define HUNT_40G_EXTRA_STAT_MASK ((1ULL << EF10_STAT_port_rx_align_error) |\
                                  (1ULL << EF10_STAT_port_rx_length_error))

/* These statistics are only provided if the firmware supports the
 * capability PM_AND_RXDP_COUNTERS.
 */
#define HUNT_PM_AND_RXDP_STAT_MASK (                                    \
        (1ULL << EF10_STAT_port_rx_pm_trunc_bb_overflow) |              \
        (1ULL << EF10_STAT_port_rx_pm_discard_bb_overflow) |            \
        (1ULL << EF10_STAT_port_rx_pm_trunc_vfifo_full) |               \
        (1ULL << EF10_STAT_port_rx_pm_discard_vfifo_full) |             \
        (1ULL << EF10_STAT_port_rx_pm_trunc_qbb) |                      \
        (1ULL << EF10_STAT_port_rx_pm_discard_qbb) |                    \
        (1ULL << EF10_STAT_port_rx_pm_discard_mapping) |                \
        (1ULL << EF10_STAT_port_rx_dp_q_disabled_packets) |             \
        (1ULL << EF10_STAT_port_rx_dp_di_dropped_packets) |             \
        (1ULL << EF10_STAT_port_rx_dp_streaming_packets) |              \
        (1ULL << EF10_STAT_port_rx_dp_hlb_fetch) |                      \
        (1ULL << EF10_STAT_port_rx_dp_hlb_wait))

static u64 efx_ef10_raw_stat_mask(struct efx_nic *efx)
{
        u64 raw_mask = HUNT_COMMON_STAT_MASK;
        u32 port_caps = efx_mcdi_phy_get_caps(efx);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;

        if (!(efx->mcdi->fn_flags &
              1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_LINKCTRL))
                return 0;

        if (port_caps & (1 << MC_CMD_PHY_CAP_40000FDX_LBN)) {
                raw_mask |= HUNT_40G_EXTRA_STAT_MASK;
                /* 8000 series have everything even at 40G */
                if (nic_data->datapath_caps2 &
                    (1 << MC_CMD_GET_CAPABILITIES_V2_OUT_MAC_STATS_40G_TX_SIZE_BINS_LBN))
                        raw_mask |= HUNT_10G_ONLY_STAT_MASK;
        } else {
                raw_mask |= HUNT_10G_ONLY_STAT_MASK;
        }

        if (nic_data->datapath_caps &
            (1 << MC_CMD_GET_CAPABILITIES_OUT_PM_AND_RXDP_COUNTERS_LBN))
                raw_mask |= HUNT_PM_AND_RXDP_STAT_MASK;

        return raw_mask;
}

static void efx_ef10_get_stat_mask(struct efx_nic *efx, unsigned long *mask)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        u64 raw_mask[2];

        raw_mask[0] = efx_ef10_raw_stat_mask(efx);

        /* Only show vadaptor stats when EVB capability is present */
        if (nic_data->datapath_caps &
            (1 << MC_CMD_GET_CAPABILITIES_OUT_EVB_LBN)) {
                raw_mask[0] |= ~((1ULL << EF10_STAT_rx_unicast) - 1);
                raw_mask[1] = (1ULL << (EF10_STAT_COUNT - 63)) - 1;
        } else {
                raw_mask[1] = 0;
        }

#if BITS_PER_LONG == 64
        BUILD_BUG_ON(BITS_TO_LONGS(EF10_STAT_COUNT) != 2);
        mask[0] = raw_mask[0];
        mask[1] = raw_mask[1];
#else
        BUILD_BUG_ON(BITS_TO_LONGS(EF10_STAT_COUNT) != 3);
        mask[0] = raw_mask[0] & 0xffffffff;
        mask[1] = raw_mask[0] >> 32;
        mask[2] = raw_mask[1] & 0xffffffff;
#endif
}

static size_t efx_ef10_describe_stats(struct efx_nic *efx, u8 *names)
{
        DECLARE_BITMAP(mask, EF10_STAT_COUNT);

        efx_ef10_get_stat_mask(efx, mask);
        return efx_nic_describe_stats(efx_ef10_stat_desc, EF10_STAT_COUNT,
                                      mask, names);
}

static size_t efx_ef10_update_stats_common(struct efx_nic *efx, u64 *full_stats,
                                           struct rtnl_link_stats64 *core_stats)
{
        DECLARE_BITMAP(mask, EF10_STAT_COUNT);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        u64 *stats = nic_data->stats;
        size_t stats_count = 0, index;

        efx_ef10_get_stat_mask(efx, mask);

        if (full_stats) {
                for_each_set_bit(index, mask, EF10_STAT_COUNT) {
                        if (efx_ef10_stat_desc[index].name) {
                                *full_stats++ = stats[index];
                                ++stats_count;
                        }
                }
        }

        if (!core_stats)
                return stats_count;

        if (nic_data->datapath_caps &
                        1 << MC_CMD_GET_CAPABILITIES_OUT_EVB_LBN) {
                /* Use vadaptor stats. */
                core_stats->rx_packets = stats[EF10_STAT_rx_unicast] +
                                         stats[EF10_STAT_rx_multicast] +
                                         stats[EF10_STAT_rx_broadcast];
                core_stats->tx_packets = stats[EF10_STAT_tx_unicast] +
                                         stats[EF10_STAT_tx_multicast] +
                                         stats[EF10_STAT_tx_broadcast];
                core_stats->rx_bytes = stats[EF10_STAT_rx_unicast_bytes] +
                                       stats[EF10_STAT_rx_multicast_bytes] +
                                       stats[EF10_STAT_rx_broadcast_bytes];
                core_stats->tx_bytes = stats[EF10_STAT_tx_unicast_bytes] +
                                       stats[EF10_STAT_tx_multicast_bytes] +
                                       stats[EF10_STAT_tx_broadcast_bytes];
                core_stats->rx_dropped = stats[GENERIC_STAT_rx_nodesc_trunc] +
                                         stats[GENERIC_STAT_rx_noskb_drops];
                core_stats->multicast = stats[EF10_STAT_rx_multicast];
                core_stats->rx_crc_errors = stats[EF10_STAT_rx_bad];
                core_stats->rx_fifo_errors = stats[EF10_STAT_rx_overflow];
                core_stats->rx_errors = core_stats->rx_crc_errors;
                core_stats->tx_errors = stats[EF10_STAT_tx_bad];
        } else {
                /* Use port stats. */
                core_stats->rx_packets = stats[EF10_STAT_port_rx_packets];
                core_stats->tx_packets = stats[EF10_STAT_port_tx_packets];
                core_stats->rx_bytes = stats[EF10_STAT_port_rx_bytes];
                core_stats->tx_bytes = stats[EF10_STAT_port_tx_bytes];
                core_stats->rx_dropped = stats[EF10_STAT_port_rx_nodesc_drops] +
                                         stats[GENERIC_STAT_rx_nodesc_trunc] +
                                         stats[GENERIC_STAT_rx_noskb_drops];
                core_stats->multicast = stats[EF10_STAT_port_rx_multicast];
                core_stats->rx_length_errors =
                                stats[EF10_STAT_port_rx_gtjumbo] +
                                stats[EF10_STAT_port_rx_length_error];
                core_stats->rx_crc_errors = stats[EF10_STAT_port_rx_bad];
                core_stats->rx_frame_errors =
                                stats[EF10_STAT_port_rx_align_error];
                core_stats->rx_fifo_errors = stats[EF10_STAT_port_rx_overflow];
                core_stats->rx_errors = (core_stats->rx_length_errors +
                                         core_stats->rx_crc_errors +
                                         core_stats->rx_frame_errors);
        }

        return stats_count;
}

static int efx_ef10_try_update_nic_stats_pf(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        DECLARE_BITMAP(mask, EF10_STAT_COUNT);
        __le64 generation_start, generation_end;
        u64 *stats = nic_data->stats;
        __le64 *dma_stats;

        efx_ef10_get_stat_mask(efx, mask);

        dma_stats = efx->stats_buffer.addr;

        generation_end = dma_stats[MC_CMD_MAC_GENERATION_END];
        if (generation_end == EFX_MC_STATS_GENERATION_INVALID)
                return 0;
        rmb();
        efx_nic_update_stats(efx_ef10_stat_desc, EF10_STAT_COUNT, mask,
                             stats, efx->stats_buffer.addr, false);
        rmb();
        generation_start = dma_stats[MC_CMD_MAC_GENERATION_START];
        if (generation_end != generation_start)
                return -EAGAIN;

        /* Update derived statistics */
        efx_nic_fix_nodesc_drop_stat(efx,
                                     &stats[EF10_STAT_port_rx_nodesc_drops]);
        stats[EF10_STAT_port_rx_good_bytes] =
                stats[EF10_STAT_port_rx_bytes] -
                stats[EF10_STAT_port_rx_bytes_minus_good_bytes];
        efx_update_diff_stat(&stats[EF10_STAT_port_rx_bad_bytes],
                             stats[EF10_STAT_port_rx_bytes_minus_good_bytes]);
        efx_update_sw_stats(efx, stats);
        return 0;
}


static size_t efx_ef10_update_stats_pf(struct efx_nic *efx, u64 *full_stats,
                                       struct rtnl_link_stats64 *core_stats)
{
        int retry;

        /* If we're unlucky enough to read statistics during the DMA, wait
         * up to 10ms for it to finish (typically takes <500us)
         */
        for (retry = 0; retry < 100; ++retry) {
                if (efx_ef10_try_update_nic_stats_pf(efx) == 0)
                        break;
                udelay(100);
        }

        return efx_ef10_update_stats_common(efx, full_stats, core_stats);
}

static int efx_ef10_try_update_nic_stats_vf(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        DECLARE_BITMAP(mask, EF10_STAT_COUNT);
        __le64 generation_start, generation_end;
        u64 *stats = nic_data->stats;
        u32 dma_len = MC_CMD_MAC_NSTATS * sizeof(u64);
        struct efx_buffer stats_buf;
        __le64 *dma_stats;
        int rc;

        spin_unlock_bh(&efx->stats_lock);

        if (in_interrupt()) {
                /* If in atomic context, cannot update stats.  Just update the
                 * software stats and return so the caller can continue.
                 */
                spin_lock_bh(&efx->stats_lock);
                efx_update_sw_stats(efx, stats);
                return 0;
        }

        efx_ef10_get_stat_mask(efx, mask);

        rc = efx_nic_alloc_buffer(efx, &stats_buf, dma_len, GFP_ATOMIC);
        if (rc) {
                spin_lock_bh(&efx->stats_lock);
                return rc;
        }

        dma_stats = stats_buf.addr;
        dma_stats[MC_CMD_MAC_GENERATION_END] = EFX_MC_STATS_GENERATION_INVALID;

        MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, stats_buf.dma_addr);
        MCDI_POPULATE_DWORD_1(inbuf, MAC_STATS_IN_CMD,
                              MAC_STATS_IN_DMA, 1);
        MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
        MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, EVB_PORT_ID_ASSIGNED);

        rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
                                NULL, 0, NULL);
        spin_lock_bh(&efx->stats_lock);
        if (rc) {
                /* Expect ENOENT if DMA queues have not been set up */
                if (rc != -ENOENT || atomic_read(&efx->active_queues))
                        efx_mcdi_display_error(efx, MC_CMD_MAC_STATS,
                                               sizeof(inbuf), NULL, 0, rc);
                goto out;
        }

        generation_end = dma_stats[MC_CMD_MAC_GENERATION_END];
        if (generation_end == EFX_MC_STATS_GENERATION_INVALID) {
                WARN_ON_ONCE(1);
                goto out;
        }
        rmb();
        efx_nic_update_stats(efx_ef10_stat_desc, EF10_STAT_COUNT, mask,
                             stats, stats_buf.addr, false);
        rmb();
        generation_start = dma_stats[MC_CMD_MAC_GENERATION_START];
        if (generation_end != generation_start) {
                rc = -EAGAIN;
                goto out;
        }

        efx_update_sw_stats(efx, stats);
out:
        efx_nic_free_buffer(efx, &stats_buf);
        return rc;
}

static size_t efx_ef10_update_stats_vf(struct efx_nic *efx, u64 *full_stats,
                                       struct rtnl_link_stats64 *core_stats)
{
        if (efx_ef10_try_update_nic_stats_vf(efx))
                return 0;

        return efx_ef10_update_stats_common(efx, full_stats, core_stats);
}

static void efx_ef10_push_irq_moderation(struct efx_channel *channel)
{
        struct efx_nic *efx = channel->efx;
        unsigned int mode, usecs;
        efx_dword_t timer_cmd;

        if (channel->irq_moderation_us) {
                mode = 3;
                usecs = channel->irq_moderation_us;
        } else {
                mode = 0;
                usecs = 0;
        }

        if (EFX_EF10_WORKAROUND_61265(efx)) {
                MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_EVQ_TMR_IN_LEN);
                unsigned int ns = usecs * 1000;

                MCDI_SET_DWORD(inbuf, SET_EVQ_TMR_IN_INSTANCE,
                               channel->channel);
                MCDI_SET_DWORD(inbuf, SET_EVQ_TMR_IN_TMR_LOAD_REQ_NS, ns);
                MCDI_SET_DWORD(inbuf, SET_EVQ_TMR_IN_TMR_RELOAD_REQ_NS, ns);
                MCDI_SET_DWORD(inbuf, SET_EVQ_TMR_IN_TMR_MODE, mode);

                efx_mcdi_rpc_async(efx, MC_CMD_SET_EVQ_TMR,
                                   inbuf, sizeof(inbuf), 0, NULL, 0);
        } else if (EFX_EF10_WORKAROUND_35388(efx)) {
                unsigned int ticks = efx_usecs_to_ticks(efx, usecs);

                EFX_POPULATE_DWORD_3(timer_cmd, ERF_DD_EVQ_IND_TIMER_FLAGS,
                                     EFE_DD_EVQ_IND_TIMER_FLAGS,
                                     ERF_DD_EVQ_IND_TIMER_MODE, mode,
                                     ERF_DD_EVQ_IND_TIMER_VAL, ticks);
                efx_writed_page(efx, &timer_cmd, ER_DD_EVQ_INDIRECT,
                                channel->channel);
        } else {
                unsigned int ticks = efx_usecs_to_ticks(efx, usecs);

                EFX_POPULATE_DWORD_2(timer_cmd, ERF_DZ_TC_TIMER_MODE, mode,
                                     ERF_DZ_TC_TIMER_VAL, ticks);
                efx_writed_page(efx, &timer_cmd, ER_DZ_EVQ_TMR,
                                channel->channel);
        }
}

static void efx_ef10_get_wol_vf(struct efx_nic *efx,
                                struct ethtool_wolinfo *wol) {}

static int efx_ef10_set_wol_vf(struct efx_nic *efx, u32 type)
{
        return -EOPNOTSUPP;
}

static void efx_ef10_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol)
{
        wol->supported = 0;
        wol->wolopts = 0;
        memset(&wol->sopass, 0, sizeof(wol->sopass));
}

static int efx_ef10_set_wol(struct efx_nic *efx, u32 type)
{
        if (type != 0)
                return -EINVAL;
        return 0;
}

static void efx_ef10_mcdi_request(struct efx_nic *efx,
                                  const efx_dword_t *hdr, size_t hdr_len,
                                  const efx_dword_t *sdu, size_t sdu_len)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        u8 *pdu = nic_data->mcdi_buf.addr;

        memcpy(pdu, hdr, hdr_len);
        memcpy(pdu + hdr_len, sdu, sdu_len);
        wmb();

        /* The hardware provides 'low' and 'high' (doorbell) registers
         * for passing the 64-bit address of an MCDI request to
         * firmware.  However the dwords are swapped by firmware.  The
         * least significant bits of the doorbell are then 0 for all
         * MCDI requests due to alignment.
         */
        _efx_writed(efx, cpu_to_le32((u64)nic_data->mcdi_buf.dma_addr >> 32),
                    ER_DZ_MC_DB_LWRD);
        _efx_writed(efx, cpu_to_le32((u32)nic_data->mcdi_buf.dma_addr),
                    ER_DZ_MC_DB_HWRD);
}

static bool efx_ef10_mcdi_poll_response(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        const efx_dword_t hdr = *(const efx_dword_t *)nic_data->mcdi_buf.addr;

        rmb();
        return EFX_DWORD_FIELD(hdr, MCDI_HEADER_RESPONSE);
}

static void
efx_ef10_mcdi_read_response(struct efx_nic *efx, efx_dword_t *outbuf,
                            size_t offset, size_t outlen)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        const u8 *pdu = nic_data->mcdi_buf.addr;

        memcpy(outbuf, pdu + offset, outlen);
}

static void efx_ef10_mcdi_reboot_detected(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;

        /* All our allocations have been reset */
        efx_ef10_reset_mc_allocations(efx);

        /* The datapath firmware might have been changed */
        nic_data->must_check_datapath_caps = true;

        /* MAC statistics have been cleared on the NIC; clear the local
         * statistic that we update with efx_update_diff_stat().
         */
        nic_data->stats[EF10_STAT_port_rx_bad_bytes] = 0;
}

static int efx_ef10_mcdi_poll_reboot(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        int rc;

        rc = efx_ef10_get_warm_boot_count(efx);
        if (rc < 0) {
                /* The firmware is presumably in the process of
                 * rebooting.  However, we are supposed to report each
                 * reboot just once, so we must only do that once we
                 * can read and store the updated warm boot count.
                 */
                return 0;
        }

        if (rc == nic_data->warm_boot_count)
                return 0;

        nic_data->warm_boot_count = rc;
        efx_ef10_mcdi_reboot_detected(efx);

        return -EIO;
}

/* Handle an MSI interrupt
 *
 * Handle an MSI hardware interrupt.  This routine schedules event
 * queue processing.  No interrupt acknowledgement cycle is necessary.
 * Also, we never need to check that the interrupt is for us, since
 * MSI interrupts cannot be shared.
 */
static irqreturn_t efx_ef10_msi_interrupt(int irq, void *dev_id)
{
        struct efx_msi_context *context = dev_id;
        struct efx_nic *efx = context->efx;

        netif_vdbg(efx, intr, efx->net_dev,
                   "IRQ %d on CPU %d\n", irq, raw_smp_processor_id());

        if (likely(ACCESS_ONCE(efx->irq_soft_enabled))) {
                /* Note test interrupts */
                if (context->index == efx->irq_level)
                        efx->last_irq_cpu = raw_smp_processor_id();

                /* Schedule processing of the channel */
                efx_schedule_channel_irq(efx->channel[context->index]);
        }

        return IRQ_HANDLED;
}

static irqreturn_t efx_ef10_legacy_interrupt(int irq, void *dev_id)
{
        struct efx_nic *efx = dev_id;
        bool soft_enabled = ACCESS_ONCE(efx->irq_soft_enabled);
        struct efx_channel *channel;
        efx_dword_t reg;
        u32 queues;

        /* Read the ISR which also ACKs the interrupts */
        efx_readd(efx, &reg, ER_DZ_BIU_INT_ISR);
        queues = EFX_DWORD_FIELD(reg, ERF_DZ_ISR_REG);

        if (queues == 0)
                return IRQ_NONE;

        if (likely(soft_enabled)) {
                /* Note test interrupts */
                if (queues & (1U << efx->irq_level))
                        efx->last_irq_cpu = raw_smp_processor_id();

                efx_for_each_channel(channel, efx) {
                        if (queues & 1)
                                efx_schedule_channel_irq(channel);
                        queues >>= 1;
                }
        }

        netif_vdbg(efx, intr, efx->net_dev,
                   "IRQ %d on CPU %d status " EFX_DWORD_FMT "\n",
                   irq, raw_smp_processor_id(), EFX_DWORD_VAL(reg));

        return IRQ_HANDLED;
}

static int efx_ef10_irq_test_generate(struct efx_nic *efx)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_TRIGGER_INTERRUPT_IN_LEN);

        if (efx_mcdi_set_workaround(efx, MC_CMD_WORKAROUND_BUG41750, true,
                                    NULL) == 0)
                return -ENOTSUPP;

        BUILD_BUG_ON(MC_CMD_TRIGGER_INTERRUPT_OUT_LEN != 0);

        MCDI_SET_DWORD(inbuf, TRIGGER_INTERRUPT_IN_INTR_LEVEL, efx->irq_level);
        return efx_mcdi_rpc(efx, MC_CMD_TRIGGER_INTERRUPT,
                            inbuf, sizeof(inbuf), NULL, 0, NULL);
}

static int efx_ef10_tx_probe(struct efx_tx_queue *tx_queue)
{
        return efx_nic_alloc_buffer(tx_queue->efx, &tx_queue->txd.buf,
                                    (tx_queue->ptr_mask + 1) *
                                    sizeof(efx_qword_t),
                                    GFP_KERNEL);
}

/* This writes to the TX_DESC_WPTR and also pushes data */
static inline void efx_ef10_push_tx_desc(struct efx_tx_queue *tx_queue,
                                         const efx_qword_t *txd)
{
        unsigned int write_ptr;
        efx_oword_t reg;

        write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
        EFX_POPULATE_OWORD_1(reg, ERF_DZ_TX_DESC_WPTR, write_ptr);
        reg.qword[0] = *txd;
        efx_writeo_page(tx_queue->efx, &reg,
                        ER_DZ_TX_DESC_UPD, tx_queue->queue);
}

/* Add Firmware-Assisted TSO v2 option descriptors to a queue.
 */
static int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue,
                                struct sk_buff *skb,
                                bool *data_mapped)
{
        struct efx_tx_buffer *buffer;
        struct tcphdr *tcp;
        struct iphdr *ip;

        u16 ipv4_id;
        u32 seqnum;
        u32 mss;

        EFX_WARN_ON_ONCE_PARANOID(tx_queue->tso_version != 2);

        mss = skb_shinfo(skb)->gso_size;

        if (unlikely(mss < 4)) {
                WARN_ONCE(1, "MSS of %u is too small for TSO v2\n", mss);
                return -EINVAL;
        }

        ip = ip_hdr(skb);
        if (ip->version == 4) {
                /* Modify IPv4 header if needed. */
                ip->tot_len = 0;
                ip->check = 0;
                ipv4_id = ntohs(ip->id);
        } else {
                /* Modify IPv6 header if needed. */
                struct ipv6hdr *ipv6 = ipv6_hdr(skb);

                ipv6->payload_len = 0;
                ipv4_id = 0;
        }

        tcp = tcp_hdr(skb);
        seqnum = ntohl(tcp->seq);

        buffer = efx_tx_queue_get_insert_buffer(tx_queue);

        buffer->flags = EFX_TX_BUF_OPTION;
        buffer->len = 0;
        buffer->unmap_len = 0;
        EFX_POPULATE_QWORD_5(buffer->option,
                        ESF_DZ_TX_DESC_IS_OPT, 1,
                        ESF_DZ_TX_OPTION_TYPE, ESE_DZ_TX_OPTION_DESC_TSO,
                        ESF_DZ_TX_TSO_OPTION_TYPE,
                        ESE_DZ_TX_TSO_OPTION_DESC_FATSO2A,
                        ESF_DZ_TX_TSO_IP_ID, ipv4_id,
                        ESF_DZ_TX_TSO_TCP_SEQNO, seqnum
                        );
        ++tx_queue->insert_count;

        buffer = efx_tx_queue_get_insert_buffer(tx_queue);

        buffer->flags = EFX_TX_BUF_OPTION;
        buffer->len = 0;
        buffer->unmap_len = 0;
        EFX_POPULATE_QWORD_4(buffer->option,
                        ESF_DZ_TX_DESC_IS_OPT, 1,
                        ESF_DZ_TX_OPTION_TYPE, ESE_DZ_TX_OPTION_DESC_TSO,
                        ESF_DZ_TX_TSO_OPTION_TYPE,
                        ESE_DZ_TX_TSO_OPTION_DESC_FATSO2B,
                        ESF_DZ_TX_TSO_TCP_MSS, mss
                        );
        ++tx_queue->insert_count;

        return 0;
}

static u32 efx_ef10_tso_versions(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        u32 tso_versions = 0;

        if (nic_data->datapath_caps &
            (1 << MC_CMD_GET_CAPABILITIES_OUT_TX_TSO_LBN))
                tso_versions |= BIT(1);
        if (nic_data->datapath_caps2 &
            (1 << MC_CMD_GET_CAPABILITIES_V2_OUT_TX_TSO_V2_LBN))
                tso_versions |= BIT(2);
        return tso_versions;
}

static void efx_ef10_tx_init(struct efx_tx_queue *tx_queue)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_INIT_TXQ_IN_LEN(EFX_MAX_DMAQ_SIZE * 8 /
                                                       EFX_BUF_SIZE));
        bool csum_offload = tx_queue->queue & EFX_TXQ_TYPE_OFFLOAD;
        size_t entries = tx_queue->txd.buf.len / EFX_BUF_SIZE;
        struct efx_channel *channel = tx_queue->channel;
        struct efx_nic *efx = tx_queue->efx;
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        bool tso_v2 = false;
        size_t inlen;
        dma_addr_t dma_addr;
        efx_qword_t *txd;
        int rc;
        int i;
        BUILD_BUG_ON(MC_CMD_INIT_TXQ_OUT_LEN != 0);

        /* TSOv2 is a limited resource that can only be configured on a limited
         * number of queues. TSO without checksum offload is not really a thing,
         * so we only enable it for those queues.
         */
        if (csum_offload && (nic_data->datapath_caps2 &
                        (1 << MC_CMD_GET_CAPABILITIES_V2_OUT_TX_TSO_V2_LBN))) {
                tso_v2 = true;
                netif_dbg(efx, hw, efx->net_dev, "Using TSOv2 for channel %u\n",
                                channel->channel);
        }

        MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_SIZE, tx_queue->ptr_mask + 1);
        MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_TARGET_EVQ, channel->channel);
        MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_LABEL, tx_queue->queue);
        MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_INSTANCE, tx_queue->queue);
        MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_OWNER_ID, 0);
        MCDI_SET_DWORD(inbuf, INIT_TXQ_IN_PORT_ID, nic_data->vport_id);

        dma_addr = tx_queue->txd.buf.dma_addr;

        netif_dbg(efx, hw, efx->net_dev, "pushing TXQ %d. %zu entries (%llx)\n",
                  tx_queue->queue, entries, (u64)dma_addr);

        for (i = 0; i < entries; ++i) {
                MCDI_SET_ARRAY_QWORD(inbuf, INIT_TXQ_IN_DMA_ADDR, i, dma_addr);
                dma_addr += EFX_BUF_SIZE;
        }

        inlen = MC_CMD_INIT_TXQ_IN_LEN(entries);

        do {
                MCDI_POPULATE_DWORD_3(inbuf, INIT_TXQ_IN_FLAGS,
                                /* This flag was removed from mcdi_pcol.h for
                                 * the non-_EXT version of INIT_TXQ.  However,
                                 * firmware still honours it.
                                 */
                                INIT_TXQ_EXT_IN_FLAG_TSOV2_EN, tso_v2,
                                INIT_TXQ_IN_FLAG_IP_CSUM_DIS, !csum_offload,
                                INIT_TXQ_IN_FLAG_TCP_CSUM_DIS, !csum_offload);

                rc = efx_mcdi_rpc_quiet(efx, MC_CMD_INIT_TXQ, inbuf, inlen,
                                        NULL, 0, NULL);
                if (rc == -ENOSPC && tso_v2) {
                        /* Retry without TSOv2 if we're short on contexts. */
                        tso_v2 = false;
                        netif_warn(efx, probe, efx->net_dev,
                                   "TSOv2 context not available to segment in hardware. TCP performance may be reduced.\n");
                } else if (rc) {
                        efx_mcdi_display_error(efx, MC_CMD_INIT_TXQ,
                                               MC_CMD_INIT_TXQ_EXT_IN_LEN,
                                               NULL, 0, rc);
                        goto fail;
                }
        } while (rc);

        /* A previous user of this TX queue might have set us up the
         * bomb by writing a descriptor to the TX push collector but
         * not the doorbell.  (Each collector belongs to a port, not a
         * queue or function, so cannot easily be reset.)  We must
         * attempt to push a no-op descriptor in its place.
         */
        tx_queue->buffer[0].flags = EFX_TX_BUF_OPTION;
        tx_queue->insert_count = 1;
        txd = efx_tx_desc(tx_queue, 0);
        EFX_POPULATE_QWORD_4(*txd,
                             ESF_DZ_TX_DESC_IS_OPT, true,
                             ESF_DZ_TX_OPTION_TYPE,
                             ESE_DZ_TX_OPTION_DESC_CRC_CSUM,
                             ESF_DZ_TX_OPTION_UDP_TCP_CSUM, csum_offload,
                             ESF_DZ_TX_OPTION_IP_CSUM, csum_offload);
        tx_queue->write_count = 1;

        if (tso_v2) {
                tx_queue->handle_tso = efx_ef10_tx_tso_desc;
                tx_queue->tso_version = 2;
        } else if (nic_data->datapath_caps &
                        (1 << MC_CMD_GET_CAPABILITIES_OUT_TX_TSO_LBN)) {
                tx_queue->tso_version = 1;
        }

        wmb();
        efx_ef10_push_tx_desc(tx_queue, txd);

        return;

fail:
        netdev_WARN(efx->net_dev, "failed to initialise TXQ %d\n",
                    tx_queue->queue);
}

static void efx_ef10_tx_fini(struct efx_tx_queue *tx_queue)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FINI_TXQ_IN_LEN);
        MCDI_DECLARE_BUF_ERR(outbuf);
        struct efx_nic *efx = tx_queue->efx;
        size_t outlen;
        int rc;

        MCDI_SET_DWORD(inbuf, FINI_TXQ_IN_INSTANCE,
                       tx_queue->queue);

        rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FINI_TXQ, inbuf, sizeof(inbuf),
                          outbuf, sizeof(outbuf), &outlen);

        if (rc && rc != -EALREADY)
                goto fail;

        return;

fail:
        efx_mcdi_display_error(efx, MC_CMD_FINI_TXQ, MC_CMD_FINI_TXQ_IN_LEN,
                               outbuf, outlen, rc);
}

static void efx_ef10_tx_remove(struct efx_tx_queue *tx_queue)
{
        efx_nic_free_buffer(tx_queue->efx, &tx_queue->txd.buf);
}

/* This writes to the TX_DESC_WPTR; write pointer for TX descriptor ring */
static inline void efx_ef10_notify_tx_desc(struct efx_tx_queue *tx_queue)
{
        unsigned int write_ptr;
        efx_dword_t reg;

        write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
        EFX_POPULATE_DWORD_1(reg, ERF_DZ_TX_DESC_WPTR_DWORD, write_ptr);
        efx_writed_page(tx_queue->efx, &reg,
                        ER_DZ_TX_DESC_UPD_DWORD, tx_queue->queue);
}

#define EFX_EF10_MAX_TX_DESCRIPTOR_LEN 0x3fff

static unsigned int efx_ef10_tx_limit_len(struct efx_tx_queue *tx_queue,
                                          dma_addr_t dma_addr, unsigned int len)
{
        if (len > EFX_EF10_MAX_TX_DESCRIPTOR_LEN) {
                /* If we need to break across multiple descriptors we should
                 * stop at a page boundary. This assumes the length limit is
                 * greater than the page size.
                 */
                dma_addr_t end = dma_addr + EFX_EF10_MAX_TX_DESCRIPTOR_LEN;

                BUILD_BUG_ON(EFX_EF10_MAX_TX_DESCRIPTOR_LEN < EFX_PAGE_SIZE);
                len = (end & (~(EFX_PAGE_SIZE - 1))) - dma_addr;
        }

        return len;
}

static void efx_ef10_tx_write(struct efx_tx_queue *tx_queue)
{
        unsigned int old_write_count = tx_queue->write_count;
        struct efx_tx_buffer *buffer;
        unsigned int write_ptr;
        efx_qword_t *txd;

        tx_queue->xmit_more_available = false;
        if (unlikely(tx_queue->write_count == tx_queue->insert_count))
                return;

        do {
                write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
                buffer = &tx_queue->buffer[write_ptr];
                txd = efx_tx_desc(tx_queue, write_ptr);
                ++tx_queue->write_count;

                /* Create TX descriptor ring entry */
                if (buffer->flags & EFX_TX_BUF_OPTION) {
                        *txd = buffer->option;
                        if (EFX_QWORD_FIELD(*txd, ESF_DZ_TX_OPTION_TYPE) == 1)
                                /* PIO descriptor */
                                tx_queue->packet_write_count = tx_queue->write_count;
                } else {
                        tx_queue->packet_write_count = tx_queue->write_count;
                        BUILD_BUG_ON(EFX_TX_BUF_CONT != 1);
                        EFX_POPULATE_QWORD_3(
                                *txd,
                                ESF_DZ_TX_KER_CONT,
                                buffer->flags & EFX_TX_BUF_CONT,
                                ESF_DZ_TX_KER_BYTE_CNT, buffer->len,
                                ESF_DZ_TX_KER_BUF_ADDR, buffer->dma_addr);
                }
        } while (tx_queue->write_count != tx_queue->insert_count);

        wmb(); /* Ensure descriptors are written before they are fetched */

        if (efx_nic_may_push_tx_desc(tx_queue, old_write_count)) {
                txd = efx_tx_desc(tx_queue,
                                  old_write_count & tx_queue->ptr_mask);
                efx_ef10_push_tx_desc(tx_queue, txd);
                ++tx_queue->pushes;
        } else {
                efx_ef10_notify_tx_desc(tx_queue);
        }
}

#define RSS_MODE_HASH_ADDRS     (1 << RSS_MODE_HASH_SRC_ADDR_LBN |\
                                 1 << RSS_MODE_HASH_DST_ADDR_LBN)
#define RSS_MODE_HASH_PORTS     (1 << RSS_MODE_HASH_SRC_PORT_LBN |\
                                 1 << RSS_MODE_HASH_DST_PORT_LBN)
#define RSS_CONTEXT_FLAGS_DEFAULT       (1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_IPV4_EN_LBN |\
                                         1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_TCPV4_EN_LBN |\
                                         1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_IPV6_EN_LBN |\
                                         1 << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TOEPLITZ_TCPV6_EN_LBN |\
                                         (RSS_MODE_HASH_ADDRS | RSS_MODE_HASH_PORTS) << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TCP_IPV4_RSS_MODE_LBN |\
                                         RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV4_RSS_MODE_LBN |\
                                         RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_OTHER_IPV4_RSS_MODE_LBN |\
                                         (RSS_MODE_HASH_ADDRS | RSS_MODE_HASH_PORTS) << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_TCP_IPV6_RSS_MODE_LBN |\
                                         RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV6_RSS_MODE_LBN |\
                                         RSS_MODE_HASH_ADDRS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_OTHER_IPV6_RSS_MODE_LBN)

static int efx_ef10_get_rss_flags(struct efx_nic *efx, u32 context, u32 *flags)
{
        /* Firmware had a bug (sfc bug 61952) where it would not actually
         * fill in the flags field in the response to MC_CMD_RSS_CONTEXT_GET_FLAGS.
         * This meant that it would always contain whatever was previously
         * in the MCDI buffer.  Fortunately, all firmware versions with
         * this bug have the same default flags value for a newly-allocated
         * RSS context, and the only time we want to get the flags is just
         * after allocating.  Moreover, the response has a 32-bit hole
         * where the context ID would be in the request, so we can use an
         * overlength buffer in the request and pre-fill the flags field
         * with what we believe the default to be.  Thus if the firmware
         * has the bug, it will leave our pre-filled value in the flags
         * field of the response, and we will get the right answer.
         *
         * However, this does mean that this function should NOT be used if
         * the RSS context flags might not be their defaults - it is ONLY
         * reliably correct for a newly-allocated RSS context.
         */
        MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_LEN);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_LEN);
        size_t outlen;
        int rc;

        /* Check we have a hole for the context ID */
        BUILD_BUG_ON(MC_CMD_RSS_CONTEXT_GET_FLAGS_IN_LEN != MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_FLAGS_OFST);
        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_FLAGS_IN_RSS_CONTEXT_ID, context);
        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_FLAGS_OUT_FLAGS,
                       RSS_CONTEXT_FLAGS_DEFAULT);
        rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_FLAGS, inbuf,
                          sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);
        if (rc == 0) {
                if (outlen < MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_LEN)
                        rc = -EIO;
                else
                        *flags = MCDI_DWORD(outbuf, RSS_CONTEXT_GET_FLAGS_OUT_FLAGS);
        }
        return rc;
}

/* Attempt to enable 4-tuple UDP hashing on the specified RSS context.
 * If we fail, we just leave the RSS context at its default hash settings,
 * which is safe but may slightly reduce performance.
 * Defaults are 4-tuple for TCP and 2-tuple for UDP and other-IP, so we
 * just need to set the UDP ports flags (for both IP versions).
 */
static void efx_ef10_set_rss_flags(struct efx_nic *efx, u32 context)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_LEN);
        u32 flags;

        BUILD_BUG_ON(MC_CMD_RSS_CONTEXT_SET_FLAGS_OUT_LEN != 0);

        if (efx_ef10_get_rss_flags(efx, context, &flags) != 0)
                return;
        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_SET_FLAGS_IN_RSS_CONTEXT_ID, context);
        flags |= RSS_MODE_HASH_PORTS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV4_RSS_MODE_LBN;
        flags |= RSS_MODE_HASH_PORTS << MC_CMD_RSS_CONTEXT_GET_FLAGS_OUT_UDP_IPV6_RSS_MODE_LBN;
        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_SET_FLAGS_IN_FLAGS, flags);
        if (!efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_SET_FLAGS, inbuf, sizeof(inbuf),
                          NULL, 0, NULL))
                /* Succeeded, so UDP 4-tuple is now enabled */
                efx->rx_hash_udp_4tuple = true;
}

static int efx_ef10_alloc_rss_context(struct efx_nic *efx, u32 *context,
                                      bool exclusive, unsigned *context_size)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_ALLOC_IN_LEN);
        MCDI_DECLARE_BUF(outbuf, MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN);
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        size_t outlen;
        int rc;
        u32 alloc_type = exclusive ?
                                MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_EXCLUSIVE :
                                MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_SHARED;
        unsigned rss_spread = exclusive ?
                                efx->rss_spread :
                                min(rounddown_pow_of_two(efx->rss_spread),
                                    EFX_EF10_MAX_SHARED_RSS_CONTEXT_SIZE);

        if (!exclusive && rss_spread == 1) {
                *context = EFX_EF10_RSS_CONTEXT_INVALID;
                if (context_size)
                        *context_size = 1;
                return 0;
        }

        if (nic_data->datapath_caps &
            1 << MC_CMD_GET_CAPABILITIES_OUT_RX_RSS_LIMITED_LBN)
                return -EOPNOTSUPP;

        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_ALLOC_IN_UPSTREAM_PORT_ID,
                       nic_data->vport_id);
        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_ALLOC_IN_TYPE, alloc_type);
        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_ALLOC_IN_NUM_QUEUES, rss_spread);

        rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_ALLOC, inbuf, sizeof(inbuf),
                outbuf, sizeof(outbuf), &outlen);
        if (rc != 0)
                return rc;

        if (outlen < MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN)
                return -EIO;

        *context = MCDI_DWORD(outbuf, RSS_CONTEXT_ALLOC_OUT_RSS_CONTEXT_ID);

        if (context_size)
                *context_size = rss_spread;

        if (nic_data->datapath_caps &
            1 << MC_CMD_GET_CAPABILITIES_OUT_ADDITIONAL_RSS_MODES_LBN)
                efx_ef10_set_rss_flags(efx, *context);

        return 0;
}

static void efx_ef10_free_rss_context(struct efx_nic *efx, u32 context)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_FREE_IN_LEN);
        int rc;

        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_FREE_IN_RSS_CONTEXT_ID,
                       context);

        rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_FREE, inbuf, sizeof(inbuf),
                            NULL, 0, NULL);
        WARN_ON(rc != 0);
}

static int efx_ef10_populate_rss_table(struct efx_nic *efx, u32 context,
                                       const u32 *rx_indir_table, const u8 *key)
{
        MCDI_DECLARE_BUF(tablebuf, MC_CMD_RSS_CONTEXT_SET_TABLE_IN_LEN);
        MCDI_DECLARE_BUF(keybuf, MC_CMD_RSS_CONTEXT_SET_KEY_IN_LEN);
        int i, rc;

        MCDI_SET_DWORD(tablebuf, RSS_CONTEXT_SET_TABLE_IN_RSS_CONTEXT_ID,
                       context);
        BUILD_BUG_ON(ARRAY_SIZE(efx->rx_indir_table) !=
                     MC_CMD_RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE_LEN);

        /* This iterates over the length of efx->rx_indir_table, but copies
         * bytes from rx_indir_table.  That's because the latter is a pointer
         * rather than an array, but should have the same length.
         * The efx->rx_hash_key loop below is similar.
         */
        for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); ++i)
                MCDI_PTR(tablebuf,
                         RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE)[i] =
                                (u8) rx_indir_table[i];

        rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_SET_TABLE, tablebuf,
                          sizeof(tablebuf), NULL, 0, NULL);
        if (rc != 0)
                return rc;

        MCDI_SET_DWORD(keybuf, RSS_CONTEXT_SET_KEY_IN_RSS_CONTEXT_ID,
                       context);
        BUILD_BUG_ON(ARRAY_SIZE(efx->rx_hash_key) !=
                     MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
        for (i = 0; i < ARRAY_SIZE(efx->rx_hash_key); ++i)
                MCDI_PTR(keybuf, RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY)[i] = key[i];

        return efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_SET_KEY, keybuf,
                            sizeof(keybuf), NULL, 0, NULL);
}

static void efx_ef10_rx_free_indir_table(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;

        if (nic_data->rx_rss_context != EFX_EF10_RSS_CONTEXT_INVALID)
                efx_ef10_free_rss_context(efx, nic_data->rx_rss_context);
        nic_data->rx_rss_context = EFX_EF10_RSS_CONTEXT_INVALID;
}

static int efx_ef10_rx_push_shared_rss_config(struct efx_nic *efx,
                                              unsigned *context_size)
{
        u32 new_rx_rss_context;
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        int rc = efx_ef10_alloc_rss_context(efx, &new_rx_rss_context,
                                            false, context_size);

        if (rc != 0)
                return rc;

        nic_data->rx_rss_context = new_rx_rss_context;
        nic_data->rx_rss_context_exclusive = false;
        efx_set_default_rx_indir_table(efx);
        return 0;
}

static int efx_ef10_rx_push_exclusive_rss_config(struct efx_nic *efx,
                                                 const u32 *rx_indir_table,
                                                 const u8 *key)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        int rc;
        u32 new_rx_rss_context;

        if (nic_data->rx_rss_context == EFX_EF10_RSS_CONTEXT_INVALID ||
            !nic_data->rx_rss_context_exclusive) {
                rc = efx_ef10_alloc_rss_context(efx, &new_rx_rss_context,
                                                true, NULL);
                if (rc == -EOPNOTSUPP)
                        return rc;
                else if (rc != 0)
                        goto fail1;
        } else {
                new_rx_rss_context = nic_data->rx_rss_context;
        }

        rc = efx_ef10_populate_rss_table(efx, new_rx_rss_context,
                                         rx_indir_table, key);
        if (rc != 0)
                goto fail2;

        if (nic_data->rx_rss_context != new_rx_rss_context)
                efx_ef10_rx_free_indir_table(efx);
        nic_data->rx_rss_context = new_rx_rss_context;
        nic_data->rx_rss_context_exclusive = true;
        if (rx_indir_table != efx->rx_indir_table)
                memcpy(efx->rx_indir_table, rx_indir_table,
                       sizeof(efx->rx_indir_table));
        if (key != efx->rx_hash_key)
                memcpy(efx->rx_hash_key, key, efx->type->rx_hash_key_size);

        return 0;

fail2:
        if (new_rx_rss_context != nic_data->rx_rss_context)
                efx_ef10_free_rss_context(efx, new_rx_rss_context);
fail1:
        netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
        return rc;
}

static int efx_ef10_rx_pull_rss_config(struct efx_nic *efx)
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        MCDI_DECLARE_BUF(inbuf, MC_CMD_RSS_CONTEXT_GET_TABLE_IN_LEN);
        MCDI_DECLARE_BUF(tablebuf, MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_LEN);
        MCDI_DECLARE_BUF(keybuf, MC_CMD_RSS_CONTEXT_GET_KEY_OUT_LEN);
        size_t outlen;
        int rc, i;

        BUILD_BUG_ON(MC_CMD_RSS_CONTEXT_GET_TABLE_IN_LEN !=
                     MC_CMD_RSS_CONTEXT_GET_KEY_IN_LEN);

        if (nic_data->rx_rss_context == EFX_EF10_RSS_CONTEXT_INVALID)
                return -ENOENT;

        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_TABLE_IN_RSS_CONTEXT_ID,
                       nic_data->rx_rss_context);
        BUILD_BUG_ON(ARRAY_SIZE(efx->rx_indir_table) !=
                     MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_INDIRECTION_TABLE_LEN);
        rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_TABLE, inbuf, sizeof(inbuf),
                          tablebuf, sizeof(tablebuf), &outlen);
        if (rc != 0)
                return rc;

        if (WARN_ON(outlen != MC_CMD_RSS_CONTEXT_GET_TABLE_OUT_LEN))
                return -EIO;

        for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table); i++)
                efx->rx_indir_table[i] = MCDI_PTR(tablebuf,
                                RSS_CONTEXT_GET_TABLE_OUT_INDIRECTION_TABLE)[i];

        MCDI_SET_DWORD(inbuf, RSS_CONTEXT_GET_KEY_IN_RSS_CONTEXT_ID,
                       nic_data->rx_rss_context);
        BUILD_BUG_ON(ARRAY_SIZE(efx->rx_hash_key) !=
                     MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
        rc = efx_mcdi_rpc(efx, MC_CMD_RSS_CONTEXT_GET_KEY, inbuf, sizeof(inbuf),
                          keybuf, sizeof(keybuf), &outlen);
        if (rc != 0)
                return rc;

        if (WARN_ON(outlen != MC_CMD_RSS_CONTEXT_GET_KEY_OUT_LEN))
                return -EIO;

        for (i = 0; i < ARRAY_SIZE(efx->rx_hash_key); ++i)
                efx->rx_hash_key[i] = MCDI_PTR(
                                keybuf, RSS_CONTEXT_GET_KEY_OUT_TOEPLITZ_KEY)[i];

        return 0;
}

static int efx_ef10_pf_rx_push_rss_config(struct efx_nic *efx, bool user,
                                          const u32 *rx_indir_table,
                                          const u8 *key)
{
        int rc;

        if (efx->rss_spread == 1)
                return 0;

        if (!key)
                key = efx->rx_hash_key;

        rc = efx_ef10_rx_push_exclusive_rss_config(efx, rx_indir_table, key);

        if (rc == -ENOBUFS && !user) {
                unsigned context_size;
                bool mismatch = false;
                size_t i;

                for (i = 0; i < ARRAY_SIZE(efx->rx_indir_table) && !mismatch;
                     i++)
                        mismatch = rx_indir_table[i] !=
                                ethtool_rxfh_indir_default(i, efx->rss_spread);

                rc = efx_ef10_rx_push_shared_rss_config(efx, &context_size);
                if (rc == 0) {
                        if (context_size != efx->rss_spread)
                                netif_warn(efx, probe, efx->net_dev,
                                           "Could not allocate an exclusive RSS"
                                           " context; allocated a shared one of"
                                           " different size."
                                           " Wanted %u, got %u.\n",
                                           efx->rss_spread, context_size);
                        else if (mismatch)
                                netif_warn(efx, probe, efx->net_dev,
                                           "Could not allocate an exclusive RSS"
                                           " context; allocated a shared one but"
                                           " could not apply custom"
                                           " indirection.\n");
                        else
                                netif_info(efx, probe, efx->net_dev,
                                           "Could not allocate an exclusive RSS"
                                           " context; allocated a shared one.\n");
                }
        }
        return rc;
}

static int efx_ef10_vf_rx_push_rss_config(struct efx_nic *efx, bool user,
                                          const u32 *rx_indir_table
                                          __attribute__ ((unused)),
                                          const u8 *key
                                          __attribute__ ((unused)))
{
        struct efx_ef10_nic_data *nic_data = efx->nic_data;

        if (user)
                return -EOPNOTSUPP;
        if (nic_data->rx_rss_context != EFX_EF10_RSS_CONTEXT_INVALID)
                return 0;
        return efx_ef10_rx_push_shared_rss_config(efx, NULL);
}

static int efx_ef10_rx_probe(struct efx_rx_queue *rx_queue)
{
        return efx_nic_alloc_buffer(rx_queue->efx, &rx_queue->rxd.buf,
                                    (rx_queue->ptr_mask + 1) *
                                    sizeof(efx_qword_t),
                                    GFP_KERNEL);
}

static void efx_ef10_rx_init(struct efx_rx_queue *rx_queue)
{
        MCDI_DECLARE_BUF(inbuf,
                         MC_CMD_INIT_RXQ_IN_LEN(EFX_MAX_DMAQ_SIZE * 8 /
                                                EFX_BUF_SIZE));
        struct efx_channel *channel = efx_rx_queue_channel(rx_queue);
        size_t entries = rx_queue->rxd.buf.len / EFX_BUF_SIZE;
        struct efx_nic *efx = rx_queue->efx;
        struct efx_ef10_nic_data *nic_data = efx->nic_data;
        size_t inlen;
        dma_addr_t dma_addr;
        int rc;
        int i;
        BUILD_BUG_ON(MC_CMD_INIT_RXQ_OUT_LEN != 0);

        rx_queue->scatter_n = 0;
        rx_queue->scatter_len = 0;

        MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_SIZE, rx_queue->ptr_mask + 1);
        MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_TARGET_EVQ, channel->channel);
        MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_LABEL, efx_rx_queue_index(rx_queue));
        MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_INSTANCE,
                       efx_rx_queue_index(rx_queue));
        MCDI_POPULATE_DWORD_2(inbuf, INIT_RXQ_IN_FLAGS,
                              INIT_RXQ_IN_FLAG_PREFIX, 1,
                              INIT_RXQ_IN_FLAG_TIMESTAMP, 1);
        MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_OWNER_ID, 0);
        MCDI_SET_DWORD(inbuf, INIT_RXQ_IN_PORT_ID, nic_data->vport_id);

        dma_addr = rx_queue->rxd.buf.dma_addr;

        netif_dbg(efx, hw, efx->net_dev, "pushing RXQ %d. %zu entries (%llx)\n",
                  efx_rx_queue_index(rx_queue), entries, (u64)dma_addr);

        for (i = 0; i < entries; ++i) {
                MCDI_SET_ARRAY_QWORD(inbuf, INIT_RXQ_IN_DMA_ADDR, i, dma_addr);
                dma_addr += EFX_BUF_SIZE;
        }

        inlen = MC_CMD_INIT_RXQ_IN_LEN(entries);

        rc = efx_mcdi_rpc(efx, MC_CMD_INIT_RXQ, inbuf, inlen,
                          NULL, 0, NULL);
        if (rc)
                netdev_WARN(efx->net_dev, "failed to initialise RXQ %d\n",
                            efx_rx_queue_index(rx_queue));
}

static void efx_ef10_rx_fini(struct efx_rx_queue *rx_queue)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FINI_RXQ_IN_LEN);
        MCDI_DECLARE_BUF_ERR(outbuf);
        struct efx_nic *efx = rx_queue->efx;
        size_t outlen;
        int rc;

        MCDI_SET_DWORD(inbuf, FINI_RXQ_IN_INSTANCE,
                       efx_rx_queue_index(rx_queue));

        rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FINI_RXQ, inbuf, sizeof(inbuf),
                          outbuf, sizeof(outbuf), &outlen);

        if (rc && rc != -EALREADY)
                goto fail;

        return;

fail:
        efx_mcdi_display_error(efx, MC_CMD_FINI_RXQ, MC_CMD_FINI_RXQ_IN_LEN,
                               outbuf, outlen, rc);
}

static void efx_ef10_rx_remove(struct efx_rx_queue *rx_queue)
{
        efx_nic_free_buffer(rx_queue->efx, &rx_queue->rxd.buf);
}

/* This creates an entry in the RX descriptor queue */
static inline void
efx_ef10_build_rx_desc(struct efx_rx_queue *rx_queue, unsigned int index)
{
        struct efx_rx_buffer *rx_buf;
        efx_qword_t *rxd;

        rxd = efx_rx_desc(rx_queue, index);
        rx_buf = efx_rx_buffer(rx_queue, index);
        EFX_POPULATE_QWORD_2(*rxd,
                             ESF_DZ_RX_KER_BYTE_CNT, rx_buf->len,
                             ESF_DZ_RX_KER_BUF_ADDR, rx_buf->dma_addr);
}

static void efx_ef10_rx_write(struct efx_rx_queue *rx_queue)
{
        struct efx_nic *efx = rx_queue->efx;
        unsigned int write_count;
        efx_dword_t reg;

        /* Firmware requires that RX_DESC_WPTR be a multiple of 8 */
        write_count = rx_queue->added_count & ~7;
        if (rx_queue->notified_count == write_count)
                return;

        do
                efx_ef10_build_rx_desc(
                        rx_queue,
                        rx_queue->notified_count & rx_queue->ptr_mask);
        while (++rx_queue->notified_count != write_count);

        wmb();
        EFX_POPULATE_DWORD_1(reg, ERF_DZ_RX_DESC_WPTR,
                             write_count & rx_queue->ptr_mask);
        efx_writed_page(efx, &reg, ER_DZ_RX_DESC_UPD,
                        efx_rx_queue_index(rx_queue));
}

static efx_mcdi_async_completer efx_ef10_rx_defer_refill_complete;

static void efx_ef10_rx_defer_refill(struct efx_rx_queue *rx_queue)
{
        struct efx_channel *channel = efx_rx_queue_channel(rx_queue);
        MCDI_DECLARE_BUF(inbuf, MC_CMD_DRIVER_EVENT_IN_LEN);
        efx_qword_t event;

        EFX_POPULATE_QWORD_2(event,
                             ESF_DZ_EV_CODE, EFX_EF10_DRVGEN_EV,
                             ESF_DZ_EV_DATA, EFX_EF10_REFILL);

        MCDI_SET_DWORD(inbuf, DRIVER_EVENT_IN_EVQ, channel->channel);

        /* MCDI_SET_QWORD is not appropriate here since EFX_POPULATE_* has
         * already swapped the data to little-endian order.
         */
        memcpy(MCDI_PTR(inbuf, DRIVER_EVENT_IN_DATA), &event.u64[0],
               sizeof(efx_qword_t));

        efx_mcdi_rpc_async(channel->efx, MC_CMD_DRIVER_EVENT,
                           inbuf, sizeof(inbuf), 0,
                           efx_ef10_rx_defer_refill_complete, 0);
}

static void
efx_ef10_rx_defer_refill_complete(struct efx_nic *efx, unsigned long cookie,
                                  int rc, efx_dword_t *outbuf,
                                  size_t outlen_actual)
{
        /* nothing to do */
}

static int efx_ef10_ev_probe(struct efx_channel *channel)
{
        return efx_nic_alloc_buffer(channel->efx, &channel->eventq.buf,
                                    (channel->eventq_mask + 1) *
                                    sizeof(efx_qword_t),
                                    GFP_KERNEL);
}

static void efx_ef10_ev_fini(struct efx_channel *channel)
{
        MCDI_DECLARE_BUF(inbuf, MC_CMD_FINI_EVQ_IN_LEN);
        MCDI_DECLARE_BUF_ERR(outbuf);
        struct efx_nic *efx = channel->efx;
        size_t outlen;
        int rc;

        MCDI_SET_DWORD(inbuf, FINI_EVQ_IN_INSTANCE, channel->channel);

        rc = efx_mcdi_rpc_quiet(efx, MC_CMD_FINI_EVQ, inbuf, sizeof(inbuf),