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 50 ixgbe_dma_tag_destroy(ixgbe_dma_tag_t *dt) 51 { 52 kmem_free(dt, sizeof(*dt)); 53 } 54 55 int 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 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 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 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 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 * 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 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 135 atomic_load_acq_uint(volatile u_int *p) 136 { 137 return atomic_load_acquire(p); 138 } 139 140 void 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