// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "wq_enet_desc.h"
#include "rq_enet_desc.h"
#include "cq_enet_desc.h"
#include "vnic_resource.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 "fnic.h"

int fnic_get_vnic_config(struct fnic *fnic)
{
        struct vnic_fc_config *c = &fnic->config;
        int err;

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

        GET_CONFIG(node_wwn);
        GET_CONFIG(port_wwn);
        GET_CONFIG(wq_enet_desc_count);
        GET_CONFIG(wq_copy_desc_count);
        GET_CONFIG(rq_desc_count);
        GET_CONFIG(maxdatafieldsize);
        GET_CONFIG(ed_tov);
        GET_CONFIG(ra_tov);
        GET_CONFIG(intr_timer);
        GET_CONFIG(intr_timer_type);
        GET_CONFIG(flags);
        GET_CONFIG(flogi_retries);
        GET_CONFIG(flogi_timeout);
        GET_CONFIG(plogi_retries);
        GET_CONFIG(plogi_timeout);
        GET_CONFIG(io_throttle_count);
        GET_CONFIG(link_down_timeout);
        GET_CONFIG(port_down_timeout);
        GET_CONFIG(port_down_io_retries);
        GET_CONFIG(luns_per_tgt);
        GET_CONFIG(intr_mode);
        GET_CONFIG(wq_copy_count);

        if ((c->flags & (VFCF_FC_INITIATOR)) == 0) {
                dev_info(&fnic->pdev->dev, "vNIC role not defined (def role: FC Init)\n");
                c->flags |= VFCF_FC_INITIATOR;
        }

        c->wq_enet_desc_count =
                min_t(u32, VNIC_FNIC_WQ_DESCS_MAX,
                      max_t(u32, VNIC_FNIC_WQ_DESCS_MIN,
                            c->wq_enet_desc_count));
        c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);

        c->wq_copy_desc_count =
                min_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MAX,
                      max_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MIN,
                            c->wq_copy_desc_count));
        c->wq_copy_desc_count = ALIGN(c->wq_copy_desc_count, 16);

        c->rq_desc_count =
                min_t(u32, VNIC_FNIC_RQ_DESCS_MAX,
                      max_t(u32, VNIC_FNIC_RQ_DESCS_MIN,
                            c->rq_desc_count));
        c->rq_desc_count = ALIGN(c->rq_desc_count, 16);

        c->maxdatafieldsize =
                min_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MAX,
                      max_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MIN,
                            c->maxdatafieldsize));
        c->ed_tov =
                min_t(u32, VNIC_FNIC_EDTOV_MAX,
                      max_t(u32, VNIC_FNIC_EDTOV_MIN,
                            c->ed_tov));

        c->ra_tov =
                min_t(u32, VNIC_FNIC_RATOV_MAX,
                      max_t(u32, VNIC_FNIC_RATOV_MIN,
                            c->ra_tov));

        c->flogi_retries =
                min_t(u32, VNIC_FNIC_FLOGI_RETRIES_MAX, c->flogi_retries);

        c->flogi_timeout =
                min_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MAX,
                      max_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MIN,
                            c->flogi_timeout));

        c->plogi_retries =
                min_t(u32, VNIC_FNIC_PLOGI_RETRIES_MAX, c->plogi_retries);

        c->plogi_timeout =
                min_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MAX,
                      max_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MIN,
                            c->plogi_timeout));

        c->io_throttle_count =
                min_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MAX,
                      max_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MIN,
                            c->io_throttle_count));

        c->link_down_timeout =
                min_t(u32, VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX,
                      c->link_down_timeout);

        c->port_down_timeout =
                min_t(u32, VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX,
                      c->port_down_timeout);

        c->port_down_io_retries =
                min_t(u32, VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX,
                      c->port_down_io_retries);

        c->luns_per_tgt =
                min_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MAX,
                      max_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MIN,
                            c->luns_per_tgt));

        c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);

        /* for older firmware, GET_CONFIG will not return anything */
        if (c->wq_copy_count == 0)
                c->wq_copy_count = 1;

        c->wq_copy_count = min_t(u16, FNIC_WQ_COPY_MAX, c->wq_copy_count);

        dev_info(&fnic->pdev->dev, "fNIC MAC addr %p wq/wq_copy/rq %d/%d/%d\n",
                        fnic->data_src_addr,
                     c->wq_enet_desc_count, c->wq_copy_desc_count,
                     c->rq_desc_count);
        dev_info(&fnic->pdev->dev, "fNIC node wwn 0x%llx port wwn 0x%llx\n",
                     c->node_wwn, c->port_wwn);
        dev_info(&fnic->pdev->dev, "fNIC ed_tov %d ra_tov %d\n",
                     c->ed_tov, c->ra_tov);
        dev_info(&fnic->pdev->dev, "fNIC mtu %d intr timer %d\n",
                     c->maxdatafieldsize, c->intr_timer);
        dev_info(&fnic->pdev->dev, "fNIC flags 0x%x luns per tgt %d\n",
                     c->flags, c->luns_per_tgt);
        dev_info(&fnic->pdev->dev, "fNIC flogi_retries %d flogi timeout %d\n",
                     c->flogi_retries, c->flogi_timeout);
        dev_info(&fnic->pdev->dev, "fNIC plogi retries %d plogi timeout %d\n",
                     c->plogi_retries, c->plogi_timeout);
        dev_info(&fnic->pdev->dev, "fNIC io throttle count %d link dn timeout %d\n",
                     c->io_throttle_count, c->link_down_timeout);
        dev_info(&fnic->pdev->dev, "fNIC port dn io retries %d port dn timeout %d\n",
                     c->port_down_io_retries, c->port_down_timeout);
        dev_info(&fnic->pdev->dev, "fNIC wq_copy_count: %d\n", c->wq_copy_count);
        dev_info(&fnic->pdev->dev, "fNIC intr mode: %d\n", c->intr_mode);

        return 0;
}

int fnic_set_nic_config(struct fnic *fnic, 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)
{
        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;

        return vnic_dev_cmd(fnic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
}

void fnic_get_res_counts(struct fnic *fnic)
{
        fnic->wq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_WQ);
        fnic->raw_wq_count = 1;
        fnic->wq_copy_count = fnic->config.wq_copy_count;
        fnic->rq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_RQ);
        fnic->cq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_CQ);
        fnic->intr_count = vnic_dev_get_res_count(fnic->vdev,
                RES_TYPE_INTR_CTRL);

        dev_info(&fnic->pdev->dev, "vNIC fw resources wq_count: %d\n", fnic->wq_count);
        dev_info(&fnic->pdev->dev, "vNIC fw resources raw_wq_count: %d\n", fnic->raw_wq_count);
        dev_info(&fnic->pdev->dev, "vNIC fw resources wq_copy_count: %d\n", fnic->wq_copy_count);
        dev_info(&fnic->pdev->dev, "vNIC fw resources rq_count: %d\n", fnic->rq_count);
        dev_info(&fnic->pdev->dev, "vNIC fw resources cq_count: %d\n", fnic->cq_count);
        dev_info(&fnic->pdev->dev, "vNIC fw resources intr_count: %d\n", fnic->intr_count);
}

void fnic_free_vnic_resources(struct fnic *fnic)
{
        unsigned int i;

        for (i = 0; i < fnic->raw_wq_count; i++)
                vnic_wq_free(&fnic->wq[i]);

        for (i = 0; i < fnic->wq_copy_count; i++)
                vnic_wq_copy_free(&fnic->hw_copy_wq[i]);

        for (i = 0; i < fnic->rq_count; i++)
                vnic_rq_free(&fnic->rq[i]);

        for (i = 0; i < fnic->cq_count; i++)
                vnic_cq_free(&fnic->cq[i]);

        for (i = 0; i < fnic->intr_count; i++)
                vnic_intr_free(&fnic->intr[i]);
}

int fnic_alloc_vnic_resources(struct fnic *fnic)
{
        enum vnic_dev_intr_mode intr_mode;
        unsigned int mask_on_assertion;
        unsigned int interrupt_offset;
        unsigned int error_interrupt_enable;
        unsigned int error_interrupt_offset;
        unsigned int i, cq_index;
        unsigned int wq_copy_cq_desc_count;
        int err;

        intr_mode = vnic_dev_get_intr_mode(fnic->vdev);

        dev_info(&fnic->pdev->dev, "vNIC interrupt mode: %s\n",
                     intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
                     intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
                     intr_mode == VNIC_DEV_INTR_MODE_MSIX ?
                     "MSI-X" : "unknown");

        dev_info(&fnic->pdev->dev, "res avail: wq %d cp_wq %d raw_wq %d rq %d",
                        fnic->wq_count, fnic->wq_copy_count,
                        fnic->raw_wq_count, fnic->rq_count);

        dev_info(&fnic->pdev->dev, "res avail: cq %d intr %d cpy-wq desc count %d\n",
                        fnic->cq_count, fnic->intr_count,
                        fnic->config.wq_copy_desc_count);

        /* Allocate Raw WQ used for FCS frames */
        for (i = 0; i < fnic->raw_wq_count; i++) {
                err = vnic_wq_alloc(fnic->vdev, &fnic->wq[i], i,
                        fnic->config.wq_enet_desc_count,
                        sizeof(struct wq_enet_desc));
                if (err)
                        goto err_out_cleanup;
        }

        /* Allocate Copy WQs used for SCSI IOs */
        for (i = 0; i < fnic->wq_copy_count; i++) {
                err = vnic_wq_copy_alloc(fnic->vdev, &fnic->hw_copy_wq[i],
                        (fnic->raw_wq_count + i),
                        fnic->config.wq_copy_desc_count,
                        sizeof(struct fcpio_host_req));
                if (err)
                        goto err_out_cleanup;
        }

        /* RQ for receiving FCS frames */
        for (i = 0; i < fnic->rq_count; i++) {
                err = vnic_rq_alloc(fnic->vdev, &fnic->rq[i], i,
                        fnic->config.rq_desc_count,
                        sizeof(struct rq_enet_desc));
                if (err)
                        goto err_out_cleanup;
        }

        /* CQ for each RQ */
        for (i = 0; i < fnic->rq_count; i++) {
                cq_index = i;
                err = vnic_cq_alloc(fnic->vdev,
                        &fnic->cq[cq_index], cq_index,
                        fnic->config.rq_desc_count,
                        sizeof(struct cq_enet_rq_desc));
                if (err)
                        goto err_out_cleanup;
        }

        /* CQ for each WQ */
        for (i = 0; i < fnic->raw_wq_count; i++) {
                cq_index = fnic->rq_count + i;
                err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index], cq_index,
                        fnic->config.wq_enet_desc_count,
                        sizeof(struct cq_enet_wq_desc));
                if (err)
                        goto err_out_cleanup;
        }

        /* CQ for each COPY WQ */
        wq_copy_cq_desc_count = (fnic->config.wq_copy_desc_count * 3);
        for (i = 0; i < fnic->wq_copy_count; i++) {
                cq_index = fnic->raw_wq_count + fnic->rq_count + i;
                err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index],
                        cq_index,
                        wq_copy_cq_desc_count,
                        sizeof(struct fcpio_fw_req));
                if (err)
                        goto err_out_cleanup;
        }

        for (i = 0; i < fnic->intr_count; i++) {
                err = vnic_intr_alloc(fnic->vdev, &fnic->intr[i], i);
                if (err)
                        goto err_out_cleanup;
        }

        fnic->legacy_pba = vnic_dev_get_res(fnic->vdev,
                                RES_TYPE_INTR_PBA_LEGACY, 0);

        if (!fnic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
                dev_err(&fnic->pdev->dev, "Failed to hook legacy pba resource\n");
                err = -ENODEV;
                goto err_out_cleanup;
        }

        /*
         * Init RQ/WQ resources.
         *
         * RQ[0 to n-1] point to CQ[0 to n-1]
         * WQ[0 to m-1] point to CQ[n to n+m-1]
         * WQ_COPY[0 to k-1] points to CQ[n+m to n+m+k-1]
         *
         * Note for copy wq we always initialize with cq_index = 0
         *
         * Error interrupt is not enabled for MSI.
         */

        switch (intr_mode) {
        case VNIC_DEV_INTR_MODE_INTX:
        case VNIC_DEV_INTR_MODE_MSIX:
                error_interrupt_enable = 1;
                error_interrupt_offset = fnic->err_intr_offset;
                break;
        default:
                error_interrupt_enable = 0;
                error_interrupt_offset = 0;
                break;
        }

        for (i = 0; i < fnic->rq_count; i++) {
                cq_index = i;
                vnic_rq_init(&fnic->rq[i],
                             cq_index,
                             error_interrupt_enable,
                             error_interrupt_offset);
        }

        for (i = 0; i < fnic->raw_wq_count; i++) {
                cq_index = i + fnic->rq_count;
                vnic_wq_init(&fnic->wq[i],
                             cq_index,
                             error_interrupt_enable,
                             error_interrupt_offset);
        }

        for (i = 0; i < fnic->wq_copy_count; i++) {
                vnic_wq_copy_init(&fnic->hw_copy_wq[i],
                                  0 /* cq_index 0 - always */,
                                  error_interrupt_enable,
                                  error_interrupt_offset);
        }

        for (i = 0; i < fnic->cq_count; i++) {

                switch (intr_mode) {
                case VNIC_DEV_INTR_MODE_MSIX:
                        interrupt_offset = i;
                        break;
                default:
                        interrupt_offset = 0;
                        break;
                }

                vnic_cq_init(&fnic->cq[i],
                        0 /* flow_control_enable */,
                        1 /* color_enable */,
                        0 /* cq_head */,
                        0 /* cq_tail */,
                        1 /* cq_tail_color */,
                        1 /* interrupt_enable */,
                        1 /* cq_entry_enable */,
                        0 /* cq_message_enable */,
                        interrupt_offset,
                        0 /* cq_message_addr */);
        }

        /*
         * Init INTR resources
         *
         * mask_on_assertion is not used for INTx due to the level-
         * triggered nature of INTx
         */

        switch (intr_mode) {
        case VNIC_DEV_INTR_MODE_MSI:
        case VNIC_DEV_INTR_MODE_MSIX:
                mask_on_assertion = 1;
                break;
        default:
                mask_on_assertion = 0;
                break;
        }

        for (i = 0; i < fnic->intr_count; i++) {
                vnic_intr_init(&fnic->intr[i],
                        fnic->config.intr_timer,
                        fnic->config.intr_timer_type,
                        mask_on_assertion);
        }

        /* init the stats memory by making the first call here */
        err = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
        if (err) {
                dev_err(&fnic->pdev->dev, "vnic_dev_stats_dump failed - x%x\n", err);
                goto err_out_cleanup;
        }

        /* Clear LIF stats */
        vnic_dev_stats_clear(fnic->vdev);

        return 0;

err_out_cleanup:
        fnic_free_vnic_resources(fnic);

        return err;
}