// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */

#include <linux/pci.h>
#include <linux/netdevice.h>

#include "ionic.h"
#include "ionic_bus.h"
#include "ionic_lif.h"
#include "ionic_debugfs.h"

#ifdef CONFIG_DEBUG_FS

static struct dentry *ionic_dir;

void ionic_debugfs_create(void)
{
        ionic_dir = debugfs_create_dir(IONIC_DRV_NAME, NULL);
}

void ionic_debugfs_destroy(void)
{
        debugfs_remove_recursive(ionic_dir);
}

void ionic_debugfs_add_dev(struct ionic *ionic)
{
        ionic->dentry = debugfs_create_dir(ionic_bus_info(ionic), ionic_dir);
}

void ionic_debugfs_del_dev(struct ionic *ionic)
{
        debugfs_remove_recursive(ionic->dentry);
        ionic->dentry = NULL;
}

static int identity_show(struct seq_file *seq, void *v)
{
        struct ionic *ionic = seq->private;
        struct ionic_identity *ident;

        ident = &ionic->ident;

        seq_printf(seq, "nlifs:            %d\n", ident->dev.nlifs);
        seq_printf(seq, "nintrs:           %d\n", ident->dev.nintrs);
        seq_printf(seq, "ndbpgs_per_lif:   %d\n", ident->dev.ndbpgs_per_lif);
        seq_printf(seq, "intr_coal_mult:   %d\n", ident->dev.intr_coal_mult);
        seq_printf(seq, "intr_coal_div:    %d\n", ident->dev.intr_coal_div);

        seq_printf(seq, "max_ucast_filters:  %d\n", ident->lif.eth.max_ucast_filters);
        seq_printf(seq, "max_mcast_filters:  %d\n", ident->lif.eth.max_mcast_filters);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(identity);

void ionic_debugfs_add_ident(struct ionic *ionic)
{
        debugfs_create_file("identity", 0400, ionic->dentry,
                            ionic, &identity_fops);
}

void ionic_debugfs_add_sizes(struct ionic *ionic)
{
        debugfs_create_u32("nlifs", 0400, ionic->dentry,
                           (u32 *)&ionic->ident.dev.nlifs);
        debugfs_create_u32("nintrs", 0400, ionic->dentry, &ionic->nintrs);

        debugfs_create_u32("ntxqs_per_lif", 0400, ionic->dentry,
                           (u32 *)&ionic->ident.lif.eth.config.queue_count[IONIC_QTYPE_TXQ]);
        debugfs_create_u32("nrxqs_per_lif", 0400, ionic->dentry,
                           (u32 *)&ionic->ident.lif.eth.config.queue_count[IONIC_QTYPE_RXQ]);
}

static int q_tail_show(struct seq_file *seq, void *v)
{
        struct ionic_queue *q = seq->private;

        seq_printf(seq, "%d\n", q->tail_idx);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(q_tail);

static int q_head_show(struct seq_file *seq, void *v)
{
        struct ionic_queue *q = seq->private;

        seq_printf(seq, "%d\n", q->head_idx);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(q_head);

static int cq_tail_show(struct seq_file *seq, void *v)
{
        struct ionic_cq *cq = seq->private;

        seq_printf(seq, "%d\n", cq->tail_idx);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(cq_tail);

static const struct debugfs_reg32 intr_ctrl_regs[] = {
        { .name = "coal_init", .offset = 0, },
        { .name = "mask", .offset = 4, },
        { .name = "credits", .offset = 8, },
        { .name = "mask_on_assert", .offset = 12, },
        { .name = "coal_timer", .offset = 16, },
};

void ionic_debugfs_add_qcq(struct ionic_lif *lif, struct ionic_qcq *qcq)
{
        struct dentry *qcq_dentry, *q_dentry, *cq_dentry;
        struct ionic_dev *idev = &lif->ionic->idev;
        struct dentry *intr_dentry, *stats_dentry;
        struct debugfs_regset32 *intr_ctrl_regset;
        struct ionic_intr_info *intr = &qcq->intr;
        struct debugfs_blob_wrapper *desc_blob;
        struct device *dev = lif->ionic->dev;
        struct ionic_queue *q = &qcq->q;
        struct ionic_cq *cq = &qcq->cq;

        qcq_dentry = debugfs_create_dir(q->name, lif->dentry);
        if (IS_ERR(qcq_dentry))
                return;
        qcq->dentry = qcq_dentry;

        debugfs_create_x64("q_base_pa", 0400, qcq_dentry, &qcq->q_base_pa);
        debugfs_create_x32("q_size", 0400, qcq_dentry, &qcq->q_size);
        debugfs_create_x64("cq_base_pa", 0400, qcq_dentry, &qcq->cq_base_pa);
        debugfs_create_x32("cq_size", 0400, qcq_dentry, &qcq->cq_size);
        debugfs_create_x64("sg_base_pa", 0400, qcq_dentry, &qcq->sg_base_pa);
        debugfs_create_x32("sg_size", 0400, qcq_dentry, &qcq->sg_size);

        q_dentry = debugfs_create_dir("q", qcq->dentry);

        debugfs_create_u32("index", 0400, q_dentry, &q->index);
        debugfs_create_u32("num_descs", 0400, q_dentry, &q->num_descs);
        debugfs_create_u32("desc_size", 0400, q_dentry, &q->desc_size);
        debugfs_create_u32("pid", 0400, q_dentry, &q->pid);
        debugfs_create_u32("qid", 0400, q_dentry, &q->hw_index);
        debugfs_create_u32("qtype", 0400, q_dentry, &q->hw_type);
        debugfs_create_u64("drop", 0400, q_dentry, &q->drop);

        debugfs_create_file("tail", 0400, q_dentry, q, &q_tail_fops);
        debugfs_create_file("head", 0400, q_dentry, q, &q_head_fops);

        desc_blob = devm_kzalloc(dev, sizeof(*desc_blob), GFP_KERNEL);
        if (!desc_blob)
                return;
        desc_blob->data = q->base;
        desc_blob->size = (unsigned long)q->num_descs * q->desc_size;
        debugfs_create_blob("desc_blob", 0400, q_dentry, desc_blob);

        if (qcq->flags & IONIC_QCQ_F_SG) {
                desc_blob = devm_kzalloc(dev, sizeof(*desc_blob), GFP_KERNEL);
                if (!desc_blob)
                        return;
                desc_blob->data = q->sg_base;
                desc_blob->size = (unsigned long)q->num_descs * q->sg_desc_size;
                debugfs_create_blob("sg_desc_blob", 0400, q_dentry,
                                    desc_blob);
        }

        cq_dentry = debugfs_create_dir("cq", qcq->dentry);

        debugfs_create_x64("base_pa", 0400, cq_dentry, &cq->base_pa);
        debugfs_create_u32("num_descs", 0400, cq_dentry, &cq->num_descs);
        debugfs_create_u32("desc_size", 0400, cq_dentry, &cq->desc_size);
        debugfs_create_bool("done_color", 0400, cq_dentry, &cq->done_color);

        debugfs_create_file("tail", 0400, cq_dentry, cq, &cq_tail_fops);

        desc_blob = devm_kzalloc(dev, sizeof(*desc_blob), GFP_KERNEL);
        if (!desc_blob)
                return;
        desc_blob->data = cq->base;
        desc_blob->size = (unsigned long)cq->num_descs * cq->desc_size;
        debugfs_create_blob("desc_blob", 0400, cq_dentry, desc_blob);

        if (qcq->flags & IONIC_QCQ_F_INTR) {
                intr_dentry = debugfs_create_dir("intr", qcq->dentry);

                debugfs_create_u32("index", 0400, intr_dentry,
                                   &intr->index);
                debugfs_create_u32("vector", 0400, intr_dentry,
                                   &intr->vector);
                debugfs_create_u32("dim_coal_hw", 0400, intr_dentry,
                                   &intr->dim_coal_hw);

                intr_ctrl_regset = devm_kzalloc(dev, sizeof(*intr_ctrl_regset),
                                                GFP_KERNEL);
                if (!intr_ctrl_regset)
                        return;
                intr_ctrl_regset->regs = intr_ctrl_regs;
                intr_ctrl_regset->nregs = ARRAY_SIZE(intr_ctrl_regs);
                intr_ctrl_regset->base = &idev->intr_ctrl[intr->index];

                debugfs_create_regset32("intr_ctrl", 0400, intr_dentry,
                                        intr_ctrl_regset);
        }

        if (qcq->flags & IONIC_QCQ_F_NOTIFYQ) {
                stats_dentry = debugfs_create_dir("notifyblock", qcq->dentry);

                debugfs_create_u64("eid", 0400, stats_dentry,
                                   (u64 *)&lif->info->status.eid);
                debugfs_create_u16("link_status", 0400, stats_dentry,
                                   (u16 *)&lif->info->status.link_status);
                debugfs_create_u32("link_speed", 0400, stats_dentry,
                                   (u32 *)&lif->info->status.link_speed);
                debugfs_create_u16("link_down_count", 0400, stats_dentry,
                                   (u16 *)&lif->info->status.link_down_count);
        }
}

static int netdev_show(struct seq_file *seq, void *v)
{
        struct net_device *netdev = seq->private;

        seq_printf(seq, "%s\n", netdev_name(netdev));

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(netdev);

static int lif_filters_show(struct seq_file *seq, void *v)
{
        struct ionic_lif *lif = seq->private;
        struct ionic_rx_filter *f;
        struct hlist_head *head;
        struct hlist_node *tmp;
        unsigned int i;

        seq_puts(seq, "id      flow        state type  filter\n");
        spin_lock_bh(&lif->rx_filters.lock);
        for (i = 0; i < IONIC_RX_FILTER_HLISTS; i++) {
                head = &lif->rx_filters.by_id[i];
                hlist_for_each_entry_safe(f, tmp, head, by_id) {
                        switch (le16_to_cpu(f->cmd.match)) {
                        case IONIC_RX_FILTER_MATCH_VLAN:
                                seq_printf(seq, "0x%04x  0x%08x  0x%02x  vlan  0x%04x\n",
                                           f->filter_id, f->flow_id, f->state,
                                           le16_to_cpu(f->cmd.vlan.vlan));
                                break;
                        case IONIC_RX_FILTER_MATCH_MAC:
                                seq_printf(seq, "0x%04x  0x%08x  0x%02x  mac   %pM\n",
                                           f->filter_id, f->flow_id, f->state,
                                           f->cmd.mac.addr);
                                break;
                        case IONIC_RX_FILTER_MATCH_MAC_VLAN:
                                seq_printf(seq, "0x%04x  0x%08x  0x%02x  macvl 0x%04x %pM\n",
                                           f->filter_id, f->flow_id, f->state,
                                           le16_to_cpu(f->cmd.vlan.vlan),
                                           f->cmd.mac.addr);
                                break;
                        case IONIC_RX_FILTER_STEER_PKTCLASS:
                                seq_printf(seq, "0x%04x  0x%08x  0x%02x  rxstr 0x%llx\n",
                                           f->filter_id, f->flow_id, f->state,
                                           le64_to_cpu(f->cmd.pkt_class));
                                break;
                        }
                }
        }
        spin_unlock_bh(&lif->rx_filters.lock);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(lif_filters);

void ionic_debugfs_add_lif(struct ionic_lif *lif)
{
        struct dentry *lif_dentry;

        lif_dentry = debugfs_create_dir(lif->name, lif->ionic->dentry);
        if (IS_ERR_OR_NULL(lif_dentry))
                return;
        lif->dentry = lif_dentry;

        debugfs_create_file("netdev", 0400, lif->dentry,
                            lif->netdev, &netdev_fops);
        debugfs_create_file("filters", 0400, lif->dentry,
                            lif, &lif_filters_fops);
}

void ionic_debugfs_del_lif(struct ionic_lif *lif)
{
        if (!lif->dentry)
                return;

        debugfs_remove_recursive(lif->dentry);
        lif->dentry = NULL;
}

void ionic_debugfs_del_qcq(struct ionic_qcq *qcq)
{
        debugfs_remove_recursive(qcq->dentry);
        qcq->dentry = NULL;
}

#endif