7a8b94e1d2
Taken-From: OpenBSD (parts of if_iwm.c r1.57 and if_iwmreg.h r1.10) Obtained from: DragonflyBSD b70c1eaad06257c5c7f4d8110d21642ebec14f42
410 lines
12 KiB
C
410 lines
12 KiB
C
/* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */
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/*
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* Copyright (c) 2014 genua mbh <info@genua.de>
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* Copyright (c) 2014 Fixup Software Ltd.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*-
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* Based on BSD-licensed source modules in the Linux iwlwifi driver,
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* which were used as the reference documentation for this implementation.
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*
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* Driver version we are currently based off of is
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* Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd)
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*
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***********************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
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* 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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*
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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/endian.h>
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#include <sys/firmware.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/module.h>
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#include <sys/proc.h>
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#include <sys/rman.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/linker.h>
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#include <machine/bus.h>
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#include <machine/endian.h>
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#include <machine/resource.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <net/bpf.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_regdomain.h>
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#include <net80211/ieee80211_ratectl.h>
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#include <net80211/ieee80211_radiotap.h>
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#include <dev/iwm/if_iwmreg.h>
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#include <dev/iwm/if_iwmvar.h>
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#include <dev/iwm/if_iwm_debug.h>
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#include <dev/iwm/if_iwm_binding.h>
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#include <dev/iwm/if_iwm_util.h>
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#include <dev/iwm/if_iwm_pcie_trans.h>
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static void
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iwm_dma_map_mem(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
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{
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if (error != 0)
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return;
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KASSERT(nsegs <= 2, ("too many DMA segments, %d should be <= 2",
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nsegs));
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if (nsegs > 1)
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KASSERT(segs[1].ds_addr == segs[0].ds_addr + segs[0].ds_len,
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("fragmented DMA memory"));
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*(bus_addr_t *)arg = segs[0].ds_addr;
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}
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/*
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* Send a command to the firmware. We try to implement the Linux
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* driver interface for the routine.
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* mostly from if_iwn (iwn_cmd()).
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*
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* For now, we always copy the first part and map the second one (if it exists).
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*/
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int
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iwm_send_cmd(struct iwm_softc *sc, struct iwm_host_cmd *hcmd)
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{
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struct iwm_tx_ring *ring = &sc->txq[IWM_MVM_CMD_QUEUE];
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struct iwm_tfd *desc;
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struct iwm_tx_data *data;
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struct iwm_device_cmd *cmd = NULL;
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bus_addr_t paddr;
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uint32_t addr_lo;
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int error = 0, i, paylen, off;
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int code;
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int async, wantresp;
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code = hcmd->id;
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async = hcmd->flags & IWM_CMD_ASYNC;
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wantresp = hcmd->flags & IWM_CMD_WANT_SKB;
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for (i = 0, paylen = 0; i < nitems(hcmd->len); i++) {
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paylen += hcmd->len[i];
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}
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/* if the command wants an answer, busy sc_cmd_resp */
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if (wantresp) {
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KASSERT(!async, ("invalid async parameter"));
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while (sc->sc_wantresp != -1)
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msleep(&sc->sc_wantresp, &sc->sc_mtx, 0, "iwmcmdsl", 0);
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sc->sc_wantresp = ring->qid << 16 | ring->cur;
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IWM_DPRINTF(sc, IWM_DEBUG_CMD,
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"wantresp is %x\n", sc->sc_wantresp);
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}
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/*
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* Is the hardware still available? (after e.g. above wait).
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*/
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if (sc->sc_flags & IWM_FLAG_STOPPED) {
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error = ENXIO;
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goto out;
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}
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desc = &ring->desc[ring->cur];
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data = &ring->data[ring->cur];
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if (paylen > sizeof(cmd->data)) {
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IWM_DPRINTF(sc, IWM_DEBUG_CMD,
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"large command paylen=%u len0=%u\n",
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paylen, hcmd->len[0]);
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/* Command is too large */
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if (paylen > IWM_MAX_CMD_PAYLOAD_SIZE) {
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device_printf(sc->sc_dev,
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"firmware command too long (%zd bytes)\n",
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paylen + sizeof(cmd->hdr));
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error = EINVAL;
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goto out;
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}
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error = bus_dmamem_alloc(ring->data_dmat, (void **)&cmd,
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BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &data->map);
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if (error != 0)
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goto out;
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error = bus_dmamap_load(ring->data_dmat, data->map,
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cmd, paylen + sizeof(cmd->hdr), iwm_dma_map_mem,
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&paddr, BUS_DMA_NOWAIT);
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if (error != 0)
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goto out;
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} else {
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cmd = &ring->cmd[ring->cur];
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paddr = data->cmd_paddr;
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}
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cmd->hdr.code = code;
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cmd->hdr.flags = 0;
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cmd->hdr.qid = ring->qid;
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cmd->hdr.idx = ring->cur;
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for (i = 0, off = 0; i < nitems(hcmd->data); i++) {
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if (hcmd->len[i] == 0)
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continue;
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memcpy(cmd->data + off, hcmd->data[i], hcmd->len[i]);
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off += hcmd->len[i];
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}
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KASSERT(off == paylen, ("off %d != paylen %d", off, paylen));
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/* lo field is not aligned */
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addr_lo = htole32((uint32_t)paddr);
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memcpy(&desc->tbs[0].lo, &addr_lo, sizeof(uint32_t));
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desc->tbs[0].hi_n_len = htole16(iwm_get_dma_hi_addr(paddr)
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| ((sizeof(cmd->hdr) + paylen) << 4));
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desc->num_tbs = 1;
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IWM_DPRINTF(sc, IWM_DEBUG_CMD,
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"%s: iwm_send_cmd 0x%x size=%lu %s\n",
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__func__,
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code,
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(unsigned long) (hcmd->len[0] + hcmd->len[1] + sizeof(cmd->hdr)),
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async ? " (async)" : "");
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if (paylen > sizeof(cmd->data)) {
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bus_dmamap_sync(ring->data_dmat, data->map,
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BUS_DMASYNC_PREWRITE);
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} else {
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bus_dmamap_sync(ring->cmd_dma.tag, ring->cmd_dma.map,
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BUS_DMASYNC_PREWRITE);
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}
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bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
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BUS_DMASYNC_PREWRITE);
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IWM_SETBITS(sc, IWM_CSR_GP_CNTRL,
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IWM_CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
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if (!iwm_poll_bit(sc, IWM_CSR_GP_CNTRL,
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IWM_CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
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(IWM_CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
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IWM_CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000)) {
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device_printf(sc->sc_dev,
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"%s: acquiring device failed\n", __func__);
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error = EBUSY;
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goto out;
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}
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#if 0
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iwm_update_sched(sc, ring->qid, ring->cur, 0, 0);
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#endif
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IWM_DPRINTF(sc, IWM_DEBUG_CMD,
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"sending command 0x%x qid %d, idx %d\n",
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code, ring->qid, ring->cur);
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/* Kick command ring. */
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ring->cur = (ring->cur + 1) % IWM_TX_RING_COUNT;
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IWM_WRITE(sc, IWM_HBUS_TARG_WRPTR, ring->qid << 8 | ring->cur);
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if (!async) {
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/* m..m-mmyy-mmyyyy-mym-ym m-my generation */
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int generation = sc->sc_generation;
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error = msleep(desc, &sc->sc_mtx, PCATCH, "iwmcmd", hz);
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if (error == 0) {
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/* if hardware is no longer up, return error */
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if (generation != sc->sc_generation) {
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error = ENXIO;
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} else {
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hcmd->resp_pkt = (void *)sc->sc_cmd_resp;
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}
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}
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}
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out:
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if (cmd && paylen > sizeof(cmd->data))
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bus_dmamem_free(ring->data_dmat, cmd, data->map);
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if (wantresp && error != 0) {
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iwm_free_resp(sc, hcmd);
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}
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return error;
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}
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/* iwlwifi: mvm/utils.c */
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int
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iwm_mvm_send_cmd_pdu(struct iwm_softc *sc, uint8_t id,
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uint32_t flags, uint16_t len, const void *data)
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{
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struct iwm_host_cmd cmd = {
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.id = id,
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.len = { len, },
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.data = { data, },
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.flags = flags,
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};
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return iwm_send_cmd(sc, &cmd);
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}
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/* iwlwifi: mvm/utils.c */
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int
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iwm_mvm_send_cmd_status(struct iwm_softc *sc,
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struct iwm_host_cmd *cmd, uint32_t *status)
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{
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struct iwm_rx_packet *pkt;
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struct iwm_cmd_response *resp;
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int error, resp_len;
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KASSERT((cmd->flags & IWM_CMD_WANT_SKB) == 0,
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("invalid command"));
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cmd->flags |= IWM_CMD_SYNC | IWM_CMD_WANT_SKB;
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if ((error = iwm_send_cmd(sc, cmd)) != 0)
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return error;
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pkt = cmd->resp_pkt;
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/* Can happen if RFKILL is asserted */
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if (!pkt) {
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error = 0;
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goto out_free_resp;
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}
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if (pkt->hdr.flags & IWM_CMD_FAILED_MSK) {
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error = EIO;
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goto out_free_resp;
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}
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resp_len = iwm_rx_packet_payload_len(pkt);
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if (resp_len != sizeof(*resp)) {
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error = EIO;
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goto out_free_resp;
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}
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resp = (void *)pkt->data;
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*status = le32toh(resp->status);
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out_free_resp:
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iwm_free_resp(sc, cmd);
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return error;
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}
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/* iwlwifi/mvm/utils.c */
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int
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iwm_mvm_send_cmd_pdu_status(struct iwm_softc *sc, uint8_t id,
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uint16_t len, const void *data, uint32_t *status)
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{
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struct iwm_host_cmd cmd = {
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.id = id,
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.len = { len, },
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.data = { data, },
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};
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return iwm_mvm_send_cmd_status(sc, &cmd, status);
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}
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void
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iwm_free_resp(struct iwm_softc *sc, struct iwm_host_cmd *hcmd)
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{
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KASSERT(sc->sc_wantresp != -1, ("already freed"));
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KASSERT((hcmd->flags & (IWM_CMD_WANT_SKB|IWM_CMD_SYNC))
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== (IWM_CMD_WANT_SKB|IWM_CMD_SYNC), ("invalid flags"));
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sc->sc_wantresp = -1;
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wakeup(&sc->sc_wantresp);
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}
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