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
49 void
ixgbe_dma_tag_destroy(ixgbe_dma_tag_t * dt)50 ixgbe_dma_tag_destroy(ixgbe_dma_tag_t *dt)
51 {
52 kmem_free(dt, sizeof(*dt));
53 }
54
55 int
ixgbe_dma_tag_create(bus_dma_tag_t dmat,bus_size_t alignment,bus_size_t boundary,bus_size_t maxsize,int nsegments,bus_size_t maxsegsize,int flags,ixgbe_dma_tag_t ** dtp)56 ixgbe_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
77 void
ixgbe_dmamap_destroy(ixgbe_dma_tag_t * dt,bus_dmamap_t dmam)78 ixgbe_dmamap_destroy(ixgbe_dma_tag_t *dt, bus_dmamap_t dmam)
79 {
80 bus_dmamap_destroy(dt->dt_dmat, dmam);
81 }
82
83 void
ixgbe_dmamap_sync(ixgbe_dma_tag_t * dt,bus_dmamap_t dmam,int ops)84 ixgbe_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
89 void
ixgbe_dmamap_unload(ixgbe_dma_tag_t * dt,bus_dmamap_t dmam)90 ixgbe_dmamap_unload(ixgbe_dma_tag_t *dt, bus_dmamap_t dmam)
91 {
92 bus_dmamap_unload(dt->dt_dmat, dmam);
93 }
94
95 int
ixgbe_dmamap_create(ixgbe_dma_tag_t * dt,int flags,bus_dmamap_t * dmamp)96 ixgbe_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
103 struct mbuf *
ixgbe_getcl(void)104 ixgbe_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
122 void
ixgbe_pci_enable_busmaster(pci_chipset_tag_t pc,pcitag_t tag)123 ixgbe_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
134 u_int
atomic_load_acq_uint(volatile u_int * p)135 atomic_load_acq_uint(volatile u_int *p)
136 {
137 return atomic_load_acquire(p);
138 }
139
140 void
ixgbe_delay(unsigned int us)141 ixgbe_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