476 lines
11 KiB
C
476 lines
11 KiB
C
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/* Broadcom NetXtreme-C/E network driver.
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*
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* Copyright (c) 2016-2018 Broadcom Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/bitops.h>
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#include <linux/irq.h>
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#include <asm/byteorder.h>
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#include <linux/bitmap.h>
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#include "bnxt_hsi.h"
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#include "bnxt.h"
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#include "bnxt_ulp.h"
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static int bnxt_register_dev(struct bnxt_en_dev *edev, int ulp_id,
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struct bnxt_ulp_ops *ulp_ops, void *handle)
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{
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struct net_device *dev = edev->net;
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struct bnxt *bp = netdev_priv(dev);
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struct bnxt_ulp *ulp;
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ASSERT_RTNL();
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if (ulp_id >= BNXT_MAX_ULP)
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return -EINVAL;
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ulp = &edev->ulp_tbl[ulp_id];
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if (rcu_access_pointer(ulp->ulp_ops)) {
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netdev_err(bp->dev, "ulp id %d already registered\n", ulp_id);
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return -EBUSY;
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}
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if (ulp_id == BNXT_ROCE_ULP) {
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unsigned int max_stat_ctxs;
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max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
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if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS ||
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bp->cp_nr_rings == max_stat_ctxs)
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return -ENOMEM;
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}
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atomic_set(&ulp->ref_count, 0);
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ulp->handle = handle;
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rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
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if (ulp_id == BNXT_ROCE_ULP) {
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if (test_bit(BNXT_STATE_OPEN, &bp->state))
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bnxt_hwrm_vnic_cfg(bp, 0);
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}
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return 0;
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}
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static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
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{
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struct net_device *dev = edev->net;
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struct bnxt *bp = netdev_priv(dev);
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struct bnxt_ulp *ulp;
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int i = 0;
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ASSERT_RTNL();
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if (ulp_id >= BNXT_MAX_ULP)
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return -EINVAL;
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ulp = &edev->ulp_tbl[ulp_id];
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if (!rcu_access_pointer(ulp->ulp_ops)) {
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netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id);
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return -EINVAL;
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}
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if (ulp_id == BNXT_ROCE_ULP && ulp->msix_requested)
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edev->en_ops->bnxt_free_msix(edev, ulp_id);
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if (ulp->max_async_event_id)
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bnxt_hwrm_func_rgtr_async_events(bp, NULL, 0);
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RCU_INIT_POINTER(ulp->ulp_ops, NULL);
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synchronize_rcu();
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ulp->max_async_event_id = 0;
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ulp->async_events_bmap = NULL;
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while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
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msleep(100);
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i++;
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}
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return 0;
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}
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static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
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{
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struct bnxt_en_dev *edev = bp->edev;
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int num_msix, idx, i;
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num_msix = edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
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idx = edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
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for (i = 0; i < num_msix; i++) {
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ent[i].vector = bp->irq_tbl[idx + i].vector;
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ent[i].ring_idx = idx + i;
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ent[i].db_offset = (idx + i) * 0x80;
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}
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}
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static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
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struct bnxt_msix_entry *ent, int num_msix)
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{
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struct net_device *dev = edev->net;
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struct bnxt *bp = netdev_priv(dev);
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struct bnxt_hw_resc *hw_resc;
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int max_idx, max_cp_rings;
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int avail_msix, idx;
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int total_vecs;
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int rc = 0;
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ASSERT_RTNL();
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if (ulp_id != BNXT_ROCE_ULP)
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return -EINVAL;
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if (!(bp->flags & BNXT_FLAG_USING_MSIX))
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return -ENODEV;
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if (edev->ulp_tbl[ulp_id].msix_requested)
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return -EAGAIN;
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max_cp_rings = bnxt_get_max_func_cp_rings(bp);
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avail_msix = bnxt_get_avail_msix(bp, num_msix);
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if (!avail_msix)
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return -ENOMEM;
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if (avail_msix > num_msix)
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avail_msix = num_msix;
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if (BNXT_NEW_RM(bp)) {
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idx = bp->cp_nr_rings;
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} else {
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max_idx = min_t(int, bp->total_irqs, max_cp_rings);
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idx = max_idx - avail_msix;
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}
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edev->ulp_tbl[ulp_id].msix_base = idx;
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edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
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hw_resc = &bp->hw_resc;
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total_vecs = idx + avail_msix;
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if (bp->total_irqs < total_vecs ||
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(BNXT_NEW_RM(bp) && hw_resc->resv_irqs < total_vecs)) {
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if (netif_running(dev)) {
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bnxt_close_nic(bp, true, false);
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rc = bnxt_open_nic(bp, true, false);
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} else {
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rc = bnxt_reserve_rings(bp, true);
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}
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}
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if (rc) {
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edev->ulp_tbl[ulp_id].msix_requested = 0;
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return -EAGAIN;
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}
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if (BNXT_NEW_RM(bp)) {
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int resv_msix;
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resv_msix = hw_resc->resv_irqs - bp->cp_nr_rings;
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avail_msix = min_t(int, resv_msix, avail_msix);
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edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
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}
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bnxt_fill_msix_vecs(bp, ent);
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edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
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return avail_msix;
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}
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static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
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{
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struct net_device *dev = edev->net;
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struct bnxt *bp = netdev_priv(dev);
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ASSERT_RTNL();
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if (ulp_id != BNXT_ROCE_ULP)
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return -EINVAL;
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if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
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return 0;
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edev->ulp_tbl[ulp_id].msix_requested = 0;
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edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
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if (netif_running(dev)) {
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bnxt_close_nic(bp, true, false);
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bnxt_open_nic(bp, true, false);
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}
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return 0;
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}
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int bnxt_get_ulp_msix_num(struct bnxt *bp)
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{
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if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
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struct bnxt_en_dev *edev = bp->edev;
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return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
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}
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return 0;
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}
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int bnxt_get_ulp_msix_base(struct bnxt *bp)
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{
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if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
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struct bnxt_en_dev *edev = bp->edev;
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if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
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return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
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}
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return 0;
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}
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int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
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{
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if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP))
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return BNXT_MIN_ROCE_STAT_CTXS;
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return 0;
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}
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static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
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struct bnxt_fw_msg *fw_msg)
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{
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struct net_device *dev = edev->net;
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struct bnxt *bp = netdev_priv(dev);
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struct input *req;
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int rc;
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if (ulp_id != BNXT_ROCE_ULP && bp->fw_reset_state)
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return -EBUSY;
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mutex_lock(&bp->hwrm_cmd_lock);
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req = fw_msg->msg;
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req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
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rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
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fw_msg->timeout);
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if (!rc) {
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struct output *resp = bp->hwrm_cmd_resp_addr;
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u32 len = le16_to_cpu(resp->resp_len);
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if (fw_msg->resp_max_len < len)
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len = fw_msg->resp_max_len;
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memcpy(fw_msg->resp, resp, len);
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}
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mutex_unlock(&bp->hwrm_cmd_lock);
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return rc;
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}
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static void bnxt_ulp_get(struct bnxt_ulp *ulp)
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{
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atomic_inc(&ulp->ref_count);
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}
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static void bnxt_ulp_put(struct bnxt_ulp *ulp)
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{
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atomic_dec(&ulp->ref_count);
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}
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void bnxt_ulp_stop(struct bnxt *bp)
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{
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struct bnxt_en_dev *edev = bp->edev;
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struct bnxt_ulp_ops *ops;
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int i;
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if (!edev)
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return;
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for (i = 0; i < BNXT_MAX_ULP; i++) {
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struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
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ops = rtnl_dereference(ulp->ulp_ops);
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if (!ops || !ops->ulp_stop)
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continue;
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ops->ulp_stop(ulp->handle);
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}
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}
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void bnxt_ulp_start(struct bnxt *bp)
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{
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struct bnxt_en_dev *edev = bp->edev;
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struct bnxt_ulp_ops *ops;
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int i;
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if (!edev)
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return;
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for (i = 0; i < BNXT_MAX_ULP; i++) {
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struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
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ops = rtnl_dereference(ulp->ulp_ops);
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if (!ops || !ops->ulp_start)
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continue;
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ops->ulp_start(ulp->handle);
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}
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}
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void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
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{
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struct bnxt_en_dev *edev = bp->edev;
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struct bnxt_ulp_ops *ops;
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int i;
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if (!edev)
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return;
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for (i = 0; i < BNXT_MAX_ULP; i++) {
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struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
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rcu_read_lock();
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ops = rcu_dereference(ulp->ulp_ops);
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if (!ops || !ops->ulp_sriov_config) {
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rcu_read_unlock();
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continue;
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}
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bnxt_ulp_get(ulp);
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rcu_read_unlock();
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ops->ulp_sriov_config(ulp->handle, num_vfs);
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bnxt_ulp_put(ulp);
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}
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}
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void bnxt_ulp_shutdown(struct bnxt *bp)
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{
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struct bnxt_en_dev *edev = bp->edev;
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struct bnxt_ulp_ops *ops;
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int i;
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if (!edev)
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return;
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for (i = 0; i < BNXT_MAX_ULP; i++) {
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struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
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ops = rtnl_dereference(ulp->ulp_ops);
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if (!ops || !ops->ulp_shutdown)
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continue;
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ops->ulp_shutdown(ulp->handle);
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}
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}
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void bnxt_ulp_irq_stop(struct bnxt *bp)
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{
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struct bnxt_en_dev *edev = bp->edev;
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struct bnxt_ulp_ops *ops;
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if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
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return;
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if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
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struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
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if (!ulp->msix_requested)
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return;
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ops = rtnl_dereference(ulp->ulp_ops);
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|
|
if (!ops || !ops->ulp_irq_stop)
|
||
|
|
return;
|
||
|
|
ops->ulp_irq_stop(ulp->handle);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
|
||
|
|
{
|
||
|
|
struct bnxt_en_dev *edev = bp->edev;
|
||
|
|
struct bnxt_ulp_ops *ops;
|
||
|
|
|
||
|
|
if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
|
||
|
|
struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
|
||
|
|
struct bnxt_msix_entry *ent = NULL;
|
||
|
|
|
||
|
|
if (!ulp->msix_requested)
|
||
|
|
return;
|
||
|
|
|
||
|
|
ops = rtnl_dereference(ulp->ulp_ops);
|
||
|
|
if (!ops || !ops->ulp_irq_restart)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (!err) {
|
||
|
|
ent = kcalloc(ulp->msix_requested, sizeof(*ent),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!ent)
|
||
|
|
return;
|
||
|
|
bnxt_fill_msix_vecs(bp, ent);
|
||
|
|
}
|
||
|
|
ops->ulp_irq_restart(ulp->handle, ent);
|
||
|
|
kfree(ent);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
|
||
|
|
{
|
||
|
|
u16 event_id = le16_to_cpu(cmpl->event_id);
|
||
|
|
struct bnxt_en_dev *edev = bp->edev;
|
||
|
|
struct bnxt_ulp_ops *ops;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (!edev)
|
||
|
|
return;
|
||
|
|
|
||
|
|
rcu_read_lock();
|
||
|
|
for (i = 0; i < BNXT_MAX_ULP; i++) {
|
||
|
|
struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
|
||
|
|
|
||
|
|
ops = rcu_dereference(ulp->ulp_ops);
|
||
|
|
if (!ops || !ops->ulp_async_notifier)
|
||
|
|
continue;
|
||
|
|
if (!ulp->async_events_bmap ||
|
||
|
|
event_id > ulp->max_async_event_id)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
/* Read max_async_event_id first before testing the bitmap. */
|
||
|
|
smp_rmb();
|
||
|
|
if (test_bit(event_id, ulp->async_events_bmap))
|
||
|
|
ops->ulp_async_notifier(ulp->handle, cmpl);
|
||
|
|
}
|
||
|
|
rcu_read_unlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
|
||
|
|
unsigned long *events_bmap, u16 max_id)
|
||
|
|
{
|
||
|
|
struct net_device *dev = edev->net;
|
||
|
|
struct bnxt *bp = netdev_priv(dev);
|
||
|
|
struct bnxt_ulp *ulp;
|
||
|
|
|
||
|
|
if (ulp_id >= BNXT_MAX_ULP)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
ulp = &edev->ulp_tbl[ulp_id];
|
||
|
|
ulp->async_events_bmap = events_bmap;
|
||
|
|
/* Make sure bnxt_ulp_async_events() sees this order */
|
||
|
|
smp_wmb();
|
||
|
|
ulp->max_async_event_id = max_id;
|
||
|
|
bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct bnxt_en_ops bnxt_en_ops_tbl = {
|
||
|
|
.bnxt_register_device = bnxt_register_dev,
|
||
|
|
.bnxt_unregister_device = bnxt_unregister_dev,
|
||
|
|
.bnxt_request_msix = bnxt_req_msix_vecs,
|
||
|
|
.bnxt_free_msix = bnxt_free_msix_vecs,
|
||
|
|
.bnxt_send_fw_msg = bnxt_send_msg,
|
||
|
|
.bnxt_register_fw_async_events = bnxt_register_async_events,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct bnxt *bp = netdev_priv(dev);
|
||
|
|
struct bnxt_en_dev *edev;
|
||
|
|
|
||
|
|
edev = bp->edev;
|
||
|
|
if (!edev) {
|
||
|
|
edev = kzalloc(sizeof(*edev), GFP_KERNEL);
|
||
|
|
if (!edev)
|
||
|
|
return ERR_PTR(-ENOMEM);
|
||
|
|
edev->en_ops = &bnxt_en_ops_tbl;
|
||
|
|
if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
|
||
|
|
edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
|
||
|
|
if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
|
||
|
|
edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
|
||
|
|
edev->net = dev;
|
||
|
|
edev->pdev = bp->pdev;
|
||
|
|
bp->edev = edev;
|
||
|
|
}
|
||
|
|
return bp->edev;
|
||
|
|
}
|