/*
 * CDDL HEADER START
 *
 * Copyright(c) 2007-2009 Intel Corporation. All rights reserved.
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at:
 *      http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When using or redistributing this file, you may do so under the
 * License only. No other modification of this header is permitted.
 *
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright (c) 2017, Joyent, Inc.
 * Copyright 2026 Oxide Computer Company
 */

#include "ixgbe_sw.h"

uint16_t
ixgbe_read_pci_cfg(struct ixgbe_hw *hw, uint32_t reg)
{
        return (pci_config_get16(OS_DEP(hw)->cfg_handle, reg));
}

void
ixgbe_write_pci_cfg(struct ixgbe_hw *hw, uint32_t reg, uint32_t val)
{
        pci_config_put16(OS_DEP(hw)->cfg_handle, reg, val);
}

/*
 * This is our last line of defense against a hardware device that has decided
 * to somehow disappear without our knowledge of it. To try and deal with this,
 * we'll read the status register and see if it returns all 1s, indicating an
 * invalid read. Note the status register is defined to have bits in all current
 * revisions that are hardwired to zero.
 */
boolean_t
ixgbe_removed(struct ixgbe_hw *hw)
{
        uint32_t val;

        val = IXGBE_READ_REG(hw, IXGBE_STATUS);
        if (val == PCI_EINVAL32) {
                ixgbe_t *ixgbe = OS_DEP(hw)->ixgbe;

                ixgbe_error(ixgbe, "failed to read status register: device "
                    "may be gone");
                if (ixgbe->ixgbe_ks != NULL) {
                        ixgbe_stat_t *s = ixgbe->ixgbe_ks->ks_data;
                        s->dev_gone.value.ui64++;
                }
                return (B_TRUE);
        }
        return (B_FALSE);
}

void *
ixgbe_malloc(struct ixgbe_hw *hw, size_t len)
{
        VERIFY3U(len, !=, 0);
        return (kmem_alloc(len, KM_SLEEP));
}

/*
 * Simple calloc that panics on overflow.
 */
void *
ixgbe_calloc(struct ixgbe_hw *hw, size_t nelem, size_t eltsize)
{
        VERIFY3U(nelem, !=, 0);
        VERIFY3U(eltsize, !=, 0);

        size_t total = nelem * eltsize;
        VERIFY3U(total / nelem, ==, eltsize);

        return (kmem_zalloc(total, KM_SLEEP));
}

void
ixgbe_free(struct ixgbe_hw *hw, void *buf, size_t len)
{
        VERIFY3U(len, !=, 0);
        return (kmem_free(buf, len));
}

void
ixgbe_init_lock(struct ixgbe_hw *hw, struct ixgbe_lock *lock)
{
        ixgbe_t *ixgbe = OS_DEP(hw)->ixgbe;

        mutex_init(&lock->il_mutex, NULL, MUTEX_DRIVER,
            DDI_INTR_PRI(ixgbe->intr_pri));
}

void
ixgbe_destroy_lock(struct ixgbe_lock *lock)
{
        mutex_destroy(&lock->il_mutex);
}

void
ixgbe_acquire_lock(struct ixgbe_lock *lock)
{
        mutex_enter(&lock->il_mutex);
}

void
ixgbe_release_lock(struct ixgbe_lock *lock)
{
        mutex_exit(&lock->il_mutex);
}