1/* $NetBSD: ixgbe_netbsd.c,v 1.17 2021/08/25 09:06:02 msaitoh Exp $ */
2/*
3 * Copyright (c) 2011 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Coyote Point Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: ixgbe_netbsd.c,v 1.17 2021/08/25 09:06:02 msaitoh Exp $");
33
34#include <sys/param.h>
35
36#include <sys/atomic.h>
37#include <sys/bus.h>
38#include <sys/condvar.h>
39#include <sys/cpu.h>
40#include <sys/kmem.h>
41#include <sys/mbuf.h>
42#include <sys/mutex.h>
43#include <sys/queue.h>
44#include <sys/workqueue.h>
45#include <dev/pci/pcivar.h>
46
47#include "ixgbe.h"
48
49void
50ixgbe_dma_tag_destroy(ixgbe_dma_tag_t *dt)
51{
52	kmem_free(dt, sizeof(*dt));
53}
54
55int
56ixgbe_dma_tag_create(bus_dma_tag_t dmat, bus_size_t alignment,
57    bus_size_t boundary, bus_size_t maxsize, int nsegments,
58    bus_size_t maxsegsize, int flags, ixgbe_dma_tag_t **dtp)
59{
60	ixgbe_dma_tag_t *dt;
61
62	*dtp = NULL;
63
64	dt = kmem_zalloc(sizeof(*dt), KM_SLEEP);
65	dt->dt_dmat = dmat;
66	dt->dt_alignment = alignment;
67	dt->dt_boundary = boundary;
68	dt->dt_maxsize = maxsize;
69	dt->dt_nsegments = nsegments;
70	dt->dt_maxsegsize = maxsegsize;
71	dt->dt_flags = flags;
72	*dtp = dt;
73
74	return 0;
75}
76
77void
78ixgbe_dmamap_destroy(ixgbe_dma_tag_t *dt, bus_dmamap_t dmam)
79{
80	bus_dmamap_destroy(dt->dt_dmat, dmam);
81}
82
83void
84ixgbe_dmamap_sync(ixgbe_dma_tag_t *dt, bus_dmamap_t dmam, int ops)
85{
86	bus_dmamap_sync(dt->dt_dmat, dmam, 0, dt->dt_maxsize, ops);
87}
88
89void
90ixgbe_dmamap_unload(ixgbe_dma_tag_t *dt, bus_dmamap_t dmam)
91{
92	bus_dmamap_unload(dt->dt_dmat, dmam);
93}
94
95int
96ixgbe_dmamap_create(ixgbe_dma_tag_t *dt, int flags, bus_dmamap_t *dmamp)
97{
98	return bus_dmamap_create(dt->dt_dmat, dt->dt_maxsize, dt->dt_nsegments,
99	    dt->dt_maxsegsize, dt->dt_boundary, flags, dmamp);
100}
101
102
103struct mbuf *
104ixgbe_getcl(void)
105{
106	struct mbuf *m;
107
108	MGETHDR(m, M_DONTWAIT, MT_DATA);
109
110	if (m == NULL)
111		return NULL;
112
113	MCLGET(m, M_DONTWAIT);
114	if ((m->m_flags & M_EXT) == 0) {
115		m_freem(m);
116		return NULL;
117	}
118
119	return m;
120}
121
122void
123ixgbe_pci_enable_busmaster(pci_chipset_tag_t pc, pcitag_t tag)
124{
125	pcireg_t	pci_cmd_word;
126
127	pci_cmd_word = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
128	if (!(pci_cmd_word & PCI_COMMAND_MASTER_ENABLE)) {
129		pci_cmd_word |= PCI_COMMAND_MASTER_ENABLE;
130		pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, pci_cmd_word);
131	}
132}
133
134u_int
135atomic_load_acq_uint(volatile u_int *p)
136{
137	return atomic_load_acquire(p);
138}
139
140void
141ixgbe_delay(unsigned int us)
142{
143
144	if (__predict_false(cold))
145		delay(us);
146	else if ((us / 1000) >= hztoms(1)) {
147		/*
148		 * Wait at least two clock ticks so we know the time has
149		 * passed.
150		 */
151		kpause("ixgdly", false, mstohz(us / 1000) + 1, NULL);
152	} else
153		delay(us);
154}
155