f0e1e8d9fb
since the the command and data that is being built to be sent to or read from the HW lives in the softc. Commands are later run via an_setdef etc. In the ioctl path various references are kept to the data stored in the softc so it needs to be protected. Almost think of the command in the softc a global variable since it essentially is. Since locking wasn't done in this type of context the commands would get corrupted. Thanks to avatar@ for catching some lock issues and dhw@ for testing. Things are a lot more stable except for the MPI-350 cards. My an(4) remote laptop stays on the network now. The driver should be changed so that it uses private memory that is passed to the functions that talk to the card. Then only those functions would really need to grab locks. Reviewed by: avatar@
292 lines
8.3 KiB
C
292 lines
8.3 KiB
C
/*-
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* Copyright (c) 1997, 1998, 1999
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* This is a PCI shim for the Aironet PC4500/4800 wireless network
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* driver. Aironet makes PCMCIA, ISA and PCI versions of these devices,
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* which all have basically the same interface. The ISA and PCI cards
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* are actually bridge adapters with PCMCIA cards inserted into them,
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* however they appear as normal PCI or ISA devices to the host.
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*
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* All we do here is handle the PCI probe and attach and set up an
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* interrupt handler entry point. The PCI version of the card uses
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* a PLX 9050 PCI to "dumb bus" bridge chip, which provides us with
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* multiple PCI address space mappings. The primary mapping at PCI
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* register 0x14 is for the PLX chip itself, *NOT* the Aironet card.
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* The I/O address of the Aironet is actually at register 0x18, which
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* is the local bus mapping register for bus space 0. There are also
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* registers for additional register spaces at registers 0x1C and
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* 0x20, but these are unused in the Aironet devices. To find out
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* more, you need a datasheet for the 9050 from PLX, but you have
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* to go through their sales office to get it. Bleh.
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*/
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#include "opt_inet.h"
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#ifdef INET
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#define ANCACHE
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sockio.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/resource.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/ethernet.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/an/if_aironet_ieee.h>
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#include <dev/an/if_anreg.h>
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struct an_type {
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u_int16_t an_vid;
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u_int16_t an_did;
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char *an_name;
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};
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#define AIRONET_VENDORID 0x14B9
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#define AIRONET_DEVICEID_35x 0x0350
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#define AIRONET_DEVICEID_4500 0x4500
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#define AIRONET_DEVICEID_4800 0x4800
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#define AIRONET_DEVICEID_4xxx 0x0001
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#define AIRONET_DEVICEID_MPI350 0xA504
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#define AN_PCI_PLX_LOIO 0x14 /* PLX chip iobase */
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#define AN_PCI_LOIO 0x18 /* Aironet iobase */
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static struct an_type an_devs[] = {
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{ AIRONET_VENDORID, AIRONET_DEVICEID_35x, "Cisco Aironet 350 Series" },
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{ AIRONET_VENDORID, AIRONET_DEVICEID_4500, "Aironet PCI4500" },
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{ AIRONET_VENDORID, AIRONET_DEVICEID_4800, "Aironet PCI4800" },
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{ AIRONET_VENDORID, AIRONET_DEVICEID_4xxx, "Aironet PCI4500/PCI4800" },
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{ 0, 0, NULL }
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};
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static int an_probe_pci (device_t);
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static int an_attach_pci (device_t);
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static int an_suspend_pci (device_t);
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static int an_resume_pci (device_t);
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static int
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an_probe_pci(device_t dev)
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{
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struct an_type *t;
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struct an_softc *sc = device_get_softc(dev);
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bzero(sc, sizeof(struct an_softc));
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t = an_devs;
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while (t->an_name != NULL) {
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if (pci_get_vendor(dev) == t->an_vid &&
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pci_get_device(dev) == t->an_did) {
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device_set_desc(dev, t->an_name);
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an_pci_probe(dev);
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return(BUS_PROBE_DEFAULT);
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}
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t++;
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}
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if (pci_get_vendor(dev) == AIRONET_VENDORID &&
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pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
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device_set_desc(dev, "Cisco Aironet MPI350");
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an_pci_probe(dev);
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return(BUS_PROBE_DEFAULT);
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}
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return(ENXIO);
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}
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static int
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an_attach_pci(dev)
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device_t dev;
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{
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u_int32_t command;
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struct an_softc *sc;
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int unit, flags, error = 0;
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sc = device_get_softc(dev);
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unit = device_get_unit(dev);
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flags = device_get_flags(dev);
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if (pci_get_vendor(dev) == AIRONET_VENDORID &&
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pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
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sc->mpi350 = 1;
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sc->port_rid = PCIR_BAR(0);
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} else {
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/*
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* Map control/status registers.
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*/
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command = pci_read_config(dev, PCIR_COMMAND, 4);
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command |= PCIM_CMD_PORTEN;
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pci_write_config(dev, PCIR_COMMAND, command, 4);
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command = pci_read_config(dev, PCIR_COMMAND, 4);
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if (!(command & PCIM_CMD_PORTEN)) {
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printf("an%d: failed to enable I/O ports!\n", unit);
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error = ENXIO;
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goto fail;
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}
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sc->port_rid = AN_PCI_LOIO;
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}
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error = an_alloc_port(dev, sc->port_rid, 1);
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if (error) {
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printf("an%d: couldn't map ports\n", unit);
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goto fail;
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}
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sc->an_btag = rman_get_bustag(sc->port_res);
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sc->an_bhandle = rman_get_bushandle(sc->port_res);
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/* Allocate memory for MPI350 */
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if (sc->mpi350) {
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/* Allocate memory */
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sc->mem_rid = PCIR_BAR(1);
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error = an_alloc_memory(dev, sc->mem_rid, 1);
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if (error) {
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printf("an%d: couldn't map memory\n", unit);
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goto fail;
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}
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sc->an_mem_btag = rman_get_bustag(sc->mem_res);
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sc->an_mem_bhandle = rman_get_bushandle(sc->mem_res);
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/* Allocate aux. memory */
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sc->mem_aux_rid = PCIR_BAR(2);
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error = an_alloc_aux_memory(dev, sc->mem_aux_rid,
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AN_AUX_MEM_SIZE);
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if (error) {
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printf("an%d: couldn't map aux memory\n", unit);
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goto fail;
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}
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sc->an_mem_aux_btag = rman_get_bustag(sc->mem_aux_res);
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sc->an_mem_aux_bhandle = rman_get_bushandle(sc->mem_aux_res);
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/* Allocate DMA region */
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error = bus_dma_tag_create(NULL, /* parent */
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1, 0, /* alignment, bounds */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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0x3ffff, /* maxsize XXX */
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1, /* nsegments */
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0xffff, /* maxsegsize XXX */
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BUS_DMA_ALLOCNOW, /* flags */
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NULL, /* lockfunc */
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NULL, /* lockarg */
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&sc->an_dtag);
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if (error) {
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printf("an%d: couldn't get DMA region\n", unit);
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goto fail;
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}
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}
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/* Allocate interrupt */
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error = an_alloc_irq(dev, 0, RF_SHAREABLE);
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if (error) {
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goto fail;
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}
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sc->an_dev = dev;
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error = an_attach(sc, device_get_unit(dev), flags);
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if (error) {
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goto fail;
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}
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/*
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* Must setup the interrupt after the an_attach to prevent racing.
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*/
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error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
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NULL, an_intr, sc, &sc->irq_handle);
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fail:
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if (error)
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an_release_resources(dev);
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return(error);
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}
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static int
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an_suspend_pci(device_t dev)
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{
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an_shutdown(dev);
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return (0);
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}
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static int
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an_resume_pci(device_t dev)
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{
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an_resume(dev);
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return (0);
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}
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static device_method_t an_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, an_probe_pci),
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DEVMETHOD(device_attach, an_attach_pci),
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DEVMETHOD(device_detach, an_detach),
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DEVMETHOD(device_shutdown, an_shutdown),
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DEVMETHOD(device_suspend, an_suspend_pci),
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DEVMETHOD(device_resume, an_resume_pci),
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{ 0, 0 }
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};
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static driver_t an_pci_driver = {
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"an",
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an_pci_methods,
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sizeof(struct an_softc),
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};
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static devclass_t an_devclass;
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DRIVER_MODULE(an, pci, an_pci_driver, an_devclass, 0, 0);
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MODULE_DEPEND(an, pci, 1, 1, 1);
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MODULE_DEPEND(an, wlan, 1, 1, 1);
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