fnic_res.c

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/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#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) { \
            shost_printk(KERN_ERR, fnic->lport->host, \
                     "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);

    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);
    c->intr_timer_type = c->intr_timer_type;

    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC MAC addr %pM "
             "wq/wq_copy/rq %d/%d/%d\n",
             fnic->ctlr.ctl_src_addr,
             c->wq_enet_desc_count, c->wq_copy_desc_count,
             c->rq_desc_count);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC node wwn %llx port wwn %llx\n",
             c->node_wwn, c->port_wwn);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC ed_tov %d ra_tov %d\n",
             c->ed_tov, c->ra_tov);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC mtu %d intr timer %d\n",
             c->maxdatafieldsize, c->intr_timer);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC flags 0x%x luns per tgt %d\n",
             c->flags, c->luns_per_tgt);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC flogi_retries %d flogi timeout %d\n",
             c->flogi_retries, c->flogi_timeout);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC plogi retries %d plogi timeout %d\n",
             c->plogi_retries, c->plogi_timeout);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC io throttle count %d link dn timeout %d\n",
             c->io_throttle_count, c->link_down_timeout);
    shost_printk(KERN_INFO, fnic->lport->host,
             "vNIC port dn io retries %d port dn timeout %d\n",
             c->port_down_io_retries, c->port_down_timeout);

    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 = fnic->wq_count - 1;
    fnic->wq_copy_count = fnic->wq_count - fnic->raw_wq_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);
}

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->wq_copy[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);

    shost_printk(KERN_INFO, fnic->lport->host, "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");

    shost_printk(KERN_INFO, fnic->lport->host, "vNIC resources avail: "
             "wq %d cp_wq %d raw_wq %d rq %d cq %d intr %d\n",
             fnic->wq_count, fnic->wq_copy_count, fnic->raw_wq_count,
             fnic->rq_count, fnic->cq_count, fnic->intr_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->wq_copy[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) {
        shost_printk(KERN_ERR, fnic->lport->host,
                 "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->wq_copy[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) {
        shost_printk(KERN_ERR, fnic->lport->host,
                 "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;
}