/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2008-2017 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */

#include "enic.h"
#include "enic_compat.h"
#include "wq_enet_desc.h"
#include "rq_enet_desc.h"
#include "cq_enet_desc.h"
#include "vnic_resource.h"
#include "vnic_enet.h"
#include "vnic_dev.h"
#include "vnic_wq.h"
#include "vnic_rq.h"
#include "vnic_cq.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "vnic_nic.h"
#include "vnic_rss.h"
#include "enic_res.h"
#include "enic.h"

int enic_get_vnic_config(struct enic *enic)
{
        struct vnic_enet_config *c = &enic->config;
        int err;
        err = vnic_dev_get_mac_addr(enic->vdev, enic->mac_addr);
        if (err) {
                dev_err(enic_get_dev(enic),
                        "Error getting MAC addr, %d\n", err);
                return err;
        }

#define GET_CONFIG(m) \
        do { \
                err = vnic_dev_spec(enic->vdev, \
                        offsetof(struct vnic_enet_config, m), \
                        sizeof(c->m), &c->m); \
                if (err) { \
                        dev_err(enic_get_dev(enic), \
                                "Error getting %s, %d\n", #m, err); \
                        return err; \
                } \
        } while (0)

        GET_CONFIG(flags);
        GET_CONFIG(wq_desc_count);
        GET_CONFIG(rq_desc_count);
        GET_CONFIG(mtu);
        GET_CONFIG(intr_timer_type);
        GET_CONFIG(intr_mode);
        GET_CONFIG(intr_timer_usec);
        GET_CONFIG(loop_tag);
        GET_CONFIG(num_arfs);
        GET_CONFIG(max_pkt_size);

        /* max packet size is only defined in newer VIC firmware
         * and will be 0 for legacy firmware and VICs
         */
        if (c->max_pkt_size > ENIC_DEFAULT_RX_MAX_PKT_SIZE)
                enic->max_mtu = c->max_pkt_size - (ETHER_HDR_LEN + 4);
        else
                enic->max_mtu = ENIC_DEFAULT_RX_MAX_PKT_SIZE
                                - (ETHER_HDR_LEN + 4);
        if (c->mtu == 0)
                c->mtu = 1500;

        enic->adv_filters = vnic_dev_capable_adv_filters(enic->vdev);

        err = vnic_dev_capable_filter_mode(enic->vdev, &enic->flow_filter_mode,
                                           &enic->filter_actions);
        if (err) {
                dev_err(enic_get_dev(enic),
                        "Error getting filter modes, %d\n", err);
                return err;
        }
        vnic_dev_capable_udp_rss_weak(enic->vdev, &enic->nic_cfg_chk,
                                      &enic->udp_rss_weak);

        c->wq_desc_count =
                min_t(u32, ENIC_MAX_WQ_DESCS,
                max_t(u32, ENIC_MIN_WQ_DESCS,
                c->wq_desc_count));
        c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */

        c->rq_desc_count =
                min_t(u32, ENIC_MAX_RQ_DESCS,
                max_t(u32, ENIC_MIN_RQ_DESCS,
                c->rq_desc_count));
        c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */

        c->intr_timer_usec = min_t(u32, c->intr_timer_usec,
                vnic_dev_get_intr_coal_timer_max(enic->vdev));

        dev_info(enic_get_dev(enic),
                "vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
                "wq/rq %d/%d mtu %d, max mtu:%d\n",
                enic->mac_addr[0], enic->mac_addr[1], enic->mac_addr[2],
                enic->mac_addr[3], enic->mac_addr[4], enic->mac_addr[5],
                c->wq_desc_count, c->rq_desc_count,
                c->mtu, enic->max_mtu);
        dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s "
                "rss %s intr mode %s type %s timer %d usec "
                "loopback tag 0x%04x\n",
                ENIC_SETTING(enic, TXCSUM) ? "yes" : "no",
                ENIC_SETTING(enic, RXCSUM) ? "yes" : "no",
                ENIC_SETTING(enic, RSS) ?
                        (ENIC_SETTING(enic, RSSHASH_UDPIPV4) ? "+UDP" :
                        ((enic->udp_rss_weak ? "+udp" :
                        "yes"))) : "no",
                c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" :
                c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" :
                c->intr_mode == VENET_INTR_MODE_ANY ? "any" :
                "unknown",
                c->intr_timer_type == VENET_INTR_TYPE_MIN ? "min" :
                c->intr_timer_type == VENET_INTR_TYPE_IDLE ? "idle" :
                "unknown",
                c->intr_timer_usec,
                c->loop_tag);

        /* RSS settings from vNIC */
        enic->reta_size = ENIC_RSS_RETA_SIZE;
        enic->hash_key_size = ENIC_RSS_HASH_KEY_SIZE;
        enic->flow_type_rss_offloads = 0;

        /* Zero offloads if RSS is not enabled */
        if (!ENIC_SETTING(enic, RSS))
                enic->flow_type_rss_offloads = 0;

        enic->vxlan = ENIC_SETTING(enic, VXLAN) &&
                vnic_dev_capable_vxlan(enic->vdev);
        /*
         * Default hardware capabilities. enic_dev_init() may add additional
         * flags if it enables overlay offloads.
         */
        enic->tx_queue_offload_capa = 0;
        return 0;
}

int enic_add_vlan(struct enic *enic, u16 vlanid)
{
        u64 a0 = vlanid, a1 = 0;
        int wait = 1000;
        int err;

        err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
        if (err)
                dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err);

        return err;
}

int enic_del_vlan(struct enic *enic, u16 vlanid)
{
        u64 a0 = vlanid, a1 = 0;
        int wait = 1000;
        int err;

        err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
        if (err)
                dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err);

        return err;
}

int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
        u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
        u8 ig_vlan_strip_en)
{
        enum vnic_devcmd_cmd cmd;
        u64 a0, a1;
        u32 nic_cfg;
        int wait = 1000;

        vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
                rss_hash_type, rss_hash_bits, rss_base_cpu,
                rss_enable, tso_ipid_split_en, ig_vlan_strip_en);

        a0 = nic_cfg;
        a1 = 0;
        cmd = enic->nic_cfg_chk ? CMD_NIC_CFG_CHK : CMD_NIC_CFG;
        return vnic_dev_cmd(enic->vdev, cmd, &a0, &a1, wait);
}

void enic_get_res_counts(struct enic *enic)
{
        enic->conf_wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
        enic->conf_rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
        enic->conf_cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
        enic->conf_intr_count = vnic_dev_get_res_count(enic->vdev,
                RES_TYPE_INTR_CTRL);

        dev_info(enic_get_dev(enic),
                "vNIC resources avail: wq %d rq %d cq %d intr %d\n",
                enic->conf_wq_count, enic->conf_rq_count,
                enic->conf_cq_count, enic->conf_intr_count);
        enic->conf_rq_count = min(enic->conf_rq_count, enic->conf_wq_count);
        enic->conf_wq_count = enic->conf_rq_count;
        enic->conf_cq_count = enic->conf_rq_count + enic->conf_wq_count;
        dev_info(enic_get_dev(enic),
                "vNIC resources iflib: wq %d rq %d cq %d intr %d\n",
                enic->conf_wq_count, enic->conf_rq_count,
                enic->conf_cq_count, enic->conf_intr_count);
        dev_info(enic_get_dev(enic),
                "vNIC resources avail: wq_desc %d rq_desc %d\n",
                enic->config.wq_desc_count, enic->config.rq_desc_count);

        enic->wq_count = enic->conf_wq_count;
        enic->rq_count = enic->conf_rq_count;
        enic->cq_count = enic->conf_cq_count;
}