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5efea30f03
freebsd/sys/dev/iwn/if_iwn.c
Andrew Thompson 5efea30f03 Create a taskqueue for each wireless interface which provides a serialised 
sleepable context for net80211 driver callbacks. This removes the need for USB
and firmware based drivers to roll their own code to defer the chip programming
for state changes, scan requests, channel changes and mcast/promisc updates.
When a driver callback completes the hardware state is now guaranteed to have
been updated and is in sync with net80211 layer.

This nukes around 1300 lines of code from the wireless device drivers making
them more readable and less race prone.

The net80211 layer has been updated as follows
 - all state/channel changes are serialised on the taskqueue.
 - ieee80211_new_state() always queues and can now be called from any context
 - scanning runs from a single taskq function and executes to completion. driver
   callbacks are synchronous so the channel, phy mode and rx filters are
   guaranteed to be set in hardware before probe request frames are
   transmitted.

Help and contributions from Sam Leffler.

Reviewed by:	sam
2009-05-02 15:14:18 +00:00

4502 lines
123 KiB
C
Raw Blame History

/*-
* Copyright (c) 2007
* Damien Bergamini <damien.bergamini@free.fr>
* Copyright (c) 2008
* Benjamin Close <benjsc@FreeBSD.org>
* Copyright (c) 2008 Sam Leffler, Errno Consulting
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Driver for Intel Wireless WiFi Link 4965AGN 802.11 network adapters.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/endian.h>
#include <sys/firmware.h>
#include <sys/limits.h>
#include <sys/module.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/clock.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_regdomain.h>
#include <dev/iwn/if_iwnreg.h>
#include <dev/iwn/if_iwnvar.h>
static int iwn_probe(device_t);
static int iwn_attach(device_t);
static int iwn_detach(device_t);
static int iwn_cleanup(device_t);
static struct ieee80211vap *iwn_vap_create(struct ieee80211com *,
const char name[IFNAMSIZ], int unit, int opmode,
int flags, const uint8_t bssid[IEEE80211_ADDR_LEN],
const uint8_t mac[IEEE80211_ADDR_LEN]);
static void iwn_vap_delete(struct ieee80211vap *);
static int iwn_shutdown(device_t);
static int iwn_suspend(device_t);
static int iwn_resume(device_t);
static int iwn_dma_contig_alloc(struct iwn_softc *, struct iwn_dma_info *,
void **, bus_size_t, bus_size_t, int);
static void iwn_dma_contig_free(struct iwn_dma_info *);
int iwn_alloc_shared(struct iwn_softc *);
void iwn_free_shared(struct iwn_softc *);
int iwn_alloc_kw(struct iwn_softc *);
void iwn_free_kw(struct iwn_softc *);
int iwn_alloc_fwmem(struct iwn_softc *);
void iwn_free_fwmem(struct iwn_softc *);
struct iwn_rbuf *iwn_alloc_rbuf(struct iwn_softc *);
void iwn_free_rbuf(void *, void *);
int iwn_alloc_rpool(struct iwn_softc *);
void iwn_free_rpool(struct iwn_softc *);
int iwn_alloc_rx_ring(struct iwn_softc *, struct iwn_rx_ring *);
void iwn_reset_rx_ring(struct iwn_softc *, struct iwn_rx_ring *);
void iwn_free_rx_ring(struct iwn_softc *, struct iwn_rx_ring *);
int iwn_alloc_tx_ring(struct iwn_softc *, struct iwn_tx_ring *,
int);
void iwn_reset_tx_ring(struct iwn_softc *, struct iwn_tx_ring *);
void iwn_free_tx_ring(struct iwn_softc *, struct iwn_tx_ring *);
static struct ieee80211_node *iwn_node_alloc(struct ieee80211vap *,
const uint8_t [IEEE80211_ADDR_LEN]);
void iwn_newassoc(struct ieee80211_node *, int);
int iwn_media_change(struct ifnet *);
int iwn_newstate(struct ieee80211vap *, enum ieee80211_state, int);
void iwn_mem_lock(struct iwn_softc *);
void iwn_mem_unlock(struct iwn_softc *);
uint32_t iwn_mem_read(struct iwn_softc *, uint32_t);
void iwn_mem_write(struct iwn_softc *, uint32_t, uint32_t);
void iwn_mem_write_region_4(struct iwn_softc *, uint32_t,
const uint32_t *, int);
int iwn_eeprom_lock(struct iwn_softc *);
void iwn_eeprom_unlock(struct iwn_softc *);
int iwn_read_prom_data(struct iwn_softc *, uint32_t, void *, int);
int iwn_transfer_microcode(struct iwn_softc *, const uint8_t *, int);
int iwn_transfer_firmware(struct iwn_softc *);
int iwn_load_firmware(struct iwn_softc *);
void iwn_unload_firmware(struct iwn_softc *);
static void iwn_timer_timeout(void *);
static void iwn_calib_reset(struct iwn_softc *);
void iwn_ampdu_rx_start(struct iwn_softc *, struct iwn_rx_desc *);
void iwn_rx_intr(struct iwn_softc *, struct iwn_rx_desc *,
struct iwn_rx_data *);
void iwn_rx_statistics(struct iwn_softc *, struct iwn_rx_desc *);
void iwn_tx_intr(struct iwn_softc *, struct iwn_rx_desc *);
void iwn_cmd_intr(struct iwn_softc *, struct iwn_rx_desc *);
void iwn_notif_intr(struct iwn_softc *);
void iwn_intr(void *);
void iwn_read_eeprom(struct iwn_softc *,
uint8_t macaddr[IEEE80211_ADDR_LEN]);
static void iwn_read_eeprom_channels(struct iwn_softc *);
void iwn_print_power_group(struct iwn_softc *, int);
uint8_t iwn_plcp_signal(int);
int iwn_tx_data(struct iwn_softc *, struct mbuf *,
struct ieee80211_node *, struct iwn_tx_ring *);
void iwn_start(struct ifnet *);
void iwn_start_locked(struct ifnet *);
static int iwn_raw_xmit(struct ieee80211_node *, struct mbuf *,
const struct ieee80211_bpf_params *);
static void iwn_watchdog(struct iwn_softc *);
int iwn_ioctl(struct ifnet *, u_long, caddr_t);
int iwn_cmd(struct iwn_softc *, int, const void *, int, int);
int iwn_set_link_quality(struct iwn_softc *, uint8_t,
const struct ieee80211_channel *, int);
int iwn_set_key(struct ieee80211com *, struct ieee80211_node *,
const struct ieee80211_key *);
int iwn_wme_update(struct ieee80211com *);
void iwn_set_led(struct iwn_softc *, uint8_t, uint8_t, uint8_t);
int iwn_set_critical_temp(struct iwn_softc *);
void iwn_enable_tsf(struct iwn_softc *, struct ieee80211_node *);
void iwn_power_calibration(struct iwn_softc *, int);
int iwn_set_txpower(struct iwn_softc *,
struct ieee80211_channel *, int);
int8_t iwn_get_rssi(struct iwn_softc *, const struct iwn_rx_stat *);
int iwn_get_noise(const struct iwn_rx_general_stats *);
int iwn_get_temperature(struct iwn_softc *);
int iwn_init_sensitivity(struct iwn_softc *);
void iwn_compute_differential_gain(struct iwn_softc *,
const struct iwn_rx_general_stats *);
void iwn_tune_sensitivity(struct iwn_softc *,
const struct iwn_rx_stats *);
int iwn_send_sensitivity(struct iwn_softc *);
int iwn_auth(struct iwn_softc *, struct ieee80211vap *);
int iwn_run(struct iwn_softc *, struct ieee80211vap *);
int iwn_scan(struct iwn_softc *);
int iwn_config(struct iwn_softc *);
void iwn_post_alive(struct iwn_softc *);
void iwn_stop_master(struct iwn_softc *);
int iwn_reset(struct iwn_softc *);
void iwn_hw_config(struct iwn_softc *);
void iwn_init_locked(struct iwn_softc *);
void iwn_init(void *);
void iwn_stop_locked(struct iwn_softc *);
void iwn_stop(struct iwn_softc *);
static void iwn_scan_start(struct ieee80211com *);
static void iwn_scan_end(struct ieee80211com *);
static void iwn_set_channel(struct ieee80211com *);
static void iwn_scan_curchan(struct ieee80211_scan_state *, unsigned long);
static void iwn_scan_mindwell(struct ieee80211_scan_state *);
static void iwn_hwreset(void *, int);
static void iwn_radioon(void *, int);
static void iwn_radiooff(void *, int);
static void iwn_bpfattach(struct iwn_softc *);
static void iwn_sysctlattach(struct iwn_softc *);
#define IWN_DEBUG
#ifdef IWN_DEBUG
enum {
IWN_DEBUG_XMIT = 0x00000001, /* basic xmit operation */
IWN_DEBUG_RECV = 0x00000002, /* basic recv operation */
IWN_DEBUG_STATE = 0x00000004, /* 802.11 state transitions */
IWN_DEBUG_TXPOW = 0x00000008, /* tx power processing */
IWN_DEBUG_RESET = 0x00000010, /* reset processing */
IWN_DEBUG_OPS = 0x00000020, /* iwn_ops processing */
IWN_DEBUG_BEACON = 0x00000040, /* beacon handling */
IWN_DEBUG_WATCHDOG = 0x00000080, /* watchdog timeout */
IWN_DEBUG_INTR = 0x00000100, /* ISR */
IWN_DEBUG_CALIBRATE = 0x00000200, /* periodic calibration */
IWN_DEBUG_NODE = 0x00000400, /* node management */
IWN_DEBUG_LED = 0x00000800, /* led management */
IWN_DEBUG_CMD = 0x00001000, /* cmd submission */
IWN_DEBUG_FATAL = 0x80000000, /* fatal errors */
IWN_DEBUG_ANY = 0xffffffff
};
#define DPRINTF(sc, m, fmt, ...) do { \
if (sc->sc_debug & (m)) \
printf(fmt, __VA_ARGS__); \
} while (0)
static const char *iwn_intr_str(uint8_t);
#else
#define DPRINTF(sc, m, fmt, ...) do { (void) sc; } while (0)
#endif
struct iwn_ident {
uint16_t vendor;
uint16_t device;
const char *name;
};
static const struct iwn_ident iwn_ident_table [] = {
{ 0x8086, 0x4229, "Intel(R) PRO/Wireless 4965BGN" },
{ 0x8086, 0x422D, "Intel(R) PRO/Wireless 4965BGN" },
{ 0x8086, 0x4230, "Intel(R) PRO/Wireless 4965BGN" },
{ 0x8086, 0x4233, "Intel(R) PRO/Wireless 4965BGN" },
{ 0, 0, NULL }
};
static int
iwn_probe(device_t dev)
{
const struct iwn_ident *ident;
for (ident = iwn_ident_table; ident->name != NULL; ident++) {
if (pci_get_vendor(dev) == ident->vendor &&
pci_get_device(dev) == ident->device) {
device_set_desc(dev, ident->name);
return 0;
}
}
return ENXIO;
}
static int
iwn_attach(device_t dev)
{
struct iwn_softc *sc = (struct iwn_softc *)device_get_softc(dev);
struct ieee80211com *ic;
struct ifnet *ifp;
int i, error, result;
uint8_t macaddr[IEEE80211_ADDR_LEN];
sc->sc_dev = dev;
/* XXX */
if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
device_printf(dev, "chip is in D%d power mode "
"-- setting to D0\n", pci_get_powerstate(dev));
pci_set_powerstate(dev, PCI_POWERSTATE_D0);
}
/* clear device specific PCI configuration register 0x41 */
pci_write_config(dev, 0x41, 0, 1);
/* enable bus-mastering */
pci_enable_busmaster(dev);
sc->mem_rid= PCIR_BAR(0);
sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid,
RF_ACTIVE);
if (sc->mem == NULL ) {
device_printf(dev, "could not allocate memory resources\n");
error = ENOMEM;
return error;
}
sc->sc_st = rman_get_bustag(sc->mem);
sc->sc_sh = rman_get_bushandle(sc->mem);
sc->irq_rid = 0;
if ((result = pci_msi_count(dev)) == 1 &&
pci_alloc_msi(dev, &result) == 0)
sc->irq_rid = 1;
sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
RF_ACTIVE | RF_SHAREABLE);
if (sc->irq == NULL) {
device_printf(dev, "could not allocate interrupt resource\n");
error = ENOMEM;
return error;
}
IWN_LOCK_INIT(sc);
callout_init_mtx(&sc->sc_timer_to, &sc->sc_mtx, 0);
TASK_INIT(&sc->sc_reinit_task, 0, iwn_hwreset, sc );
TASK_INIT(&sc->sc_radioon_task, 0, iwn_radioon, sc );
TASK_INIT(&sc->sc_radiooff_task, 0, iwn_radiooff, sc );
/*
* Put adapter into a known state.
*/
error = iwn_reset(sc);
if (error != 0) {
device_printf(dev,
"could not reset adapter, error %d\n", error);
goto fail;
}
/*
* Allocate DMA memory for firmware transfers.
*/
error = iwn_alloc_fwmem(sc);
if (error != 0) {
device_printf(dev,
"could not allocate firmware memory, error %d\n", error);
goto fail;
}
/*
* Allocate a "keep warm" page.
*/
error = iwn_alloc_kw(sc);
if (error != 0) {
device_printf(dev,
"could not allocate keep-warm page, error %d\n", error);
goto fail;
}
/*
* Allocate shared area (communication area).
*/
error = iwn_alloc_shared(sc);
if (error != 0) {
device_printf(dev,
"could not allocate shared area, error %d\n", error);
goto fail;
}
/*
* Allocate Tx rings.
*/
for (i = 0; i < IWN_NTXQUEUES; i++) {
error = iwn_alloc_tx_ring(sc, &sc->txq[i], i);
if (error != 0) {
device_printf(dev,
"could not allocate Tx ring %d, error %d\n",
i, error);
goto fail;
}
}
error = iwn_alloc_rx_ring(sc, &sc->rxq);
if (error != 0 ){
device_printf(dev,
"could not allocate Rx ring, error %d\n", error);
goto fail;
}
ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
if (ifp == NULL) {
device_printf(dev, "can not allocate ifnet structure\n");
goto fail;
}
ic = ifp->if_l2com;
ic->ic_ifp = ifp;
ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */
/* set device capabilities */
ic->ic_caps =
IEEE80211_C_STA /* station mode supported */
| IEEE80211_C_MONITOR /* monitor mode supported */
| IEEE80211_C_TXPMGT /* tx power management */
| IEEE80211_C_SHSLOT /* short slot time supported */
| IEEE80211_C_WPA
| IEEE80211_C_SHPREAMBLE /* short preamble supported */
#if 0
| IEEE80211_C_BGSCAN /* background scanning */
| IEEE80211_C_IBSS /* ibss/adhoc mode */
#endif
| IEEE80211_C_WME /* WME */
;
#if 0
/* XXX disable until HT channel setup works */
ic->ic_htcaps =
IEEE80211_HTCAP_SMPS_ENA /* SM PS mode enabled */
| IEEE80211_HTCAP_CHWIDTH40 /* 40MHz channel width */
| IEEE80211_HTCAP_SHORTGI20 /* short GI in 20MHz */
| IEEE80211_HTCAP_SHORTGI40 /* short GI in 40MHz */
| IEEE80211_HTCAP_RXSTBC_2STREAM/* 1-2 spatial streams */
| IEEE80211_HTCAP_MAXAMSDU_3839 /* max A-MSDU length */
/* s/w capabilities */
| IEEE80211_HTC_HT /* HT operation */
| IEEE80211_HTC_AMPDU /* tx A-MPDU */
| IEEE80211_HTC_AMSDU /* tx A-MSDU */
;
#endif
/* read supported channels and MAC address from EEPROM */
iwn_read_eeprom(sc, macaddr);
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_init = iwn_init;
ifp->if_ioctl = iwn_ioctl;
ifp->if_start = iwn_start;
IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
IFQ_SET_READY(&ifp->if_snd);
ieee80211_ifattach(ic, macaddr);
ic->ic_vap_create = iwn_vap_create;
ic->ic_vap_delete = iwn_vap_delete;
ic->ic_raw_xmit = iwn_raw_xmit;
ic->ic_node_alloc = iwn_node_alloc;
ic->ic_newassoc = iwn_newassoc;
ic->ic_wme.wme_update = iwn_wme_update;
ic->ic_scan_start = iwn_scan_start;
ic->ic_scan_end = iwn_scan_end;
ic->ic_set_channel = iwn_set_channel;
ic->ic_scan_curchan = iwn_scan_curchan;
ic->ic_scan_mindwell = iwn_scan_mindwell;
iwn_bpfattach(sc);
iwn_sysctlattach(sc);
/*
* Hook our interrupt after all initialization is complete.
*/
error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
NULL, iwn_intr, sc, &sc->sc_ih);
if (error != 0) {
device_printf(dev, "could not set up interrupt, error %d\n", error);
goto fail;
}
ieee80211_announce(ic);
return 0;
fail:
iwn_cleanup(dev);
return error;
}
static int
iwn_detach(device_t dev)
{
iwn_cleanup(dev);
return 0;
}
/*
* Cleanup any device resources that were allocated
*/
int
iwn_cleanup(device_t dev)
{
struct iwn_softc *sc = device_get_softc(dev);
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
int i;
ieee80211_draintask(ic, &sc->sc_reinit_task);
ieee80211_draintask(ic, &sc->sc_radioon_task);
ieee80211_draintask(ic, &sc->sc_radiooff_task);
if (ifp != NULL) {
iwn_stop(sc);
callout_drain(&sc->sc_timer_to);
bpfdetach(ifp);
ieee80211_ifdetach(ic);
}
iwn_unload_firmware(sc);
iwn_free_rx_ring(sc, &sc->rxq);
for (i = 0; i < IWN_NTXQUEUES; i++)
iwn_free_tx_ring(sc, &sc->txq[i]);
iwn_free_kw(sc);
iwn_free_fwmem(sc);
if (sc->irq != NULL) {
bus_teardown_intr(dev, sc->irq, sc->sc_ih);
bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
if (sc->irq_rid == 1)
pci_release_msi(dev);
}
if (sc->mem != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem);
if (ifp != NULL)
if_free(ifp);
IWN_LOCK_DESTROY(sc);
return 0;
}
static struct ieee80211vap *
iwn_vap_create(struct ieee80211com *ic,
const char name[IFNAMSIZ], int unit, int opmode, int flags,
const uint8_t bssid[IEEE80211_ADDR_LEN],
const uint8_t mac[IEEE80211_ADDR_LEN])
{
struct iwn_vap *ivp;
struct ieee80211vap *vap;
if (!TAILQ_EMPTY(&ic->ic_vaps)) /* only one at a time */
return NULL;
ivp = (struct iwn_vap *) malloc(sizeof(struct iwn_vap),
M_80211_VAP, M_NOWAIT | M_ZERO);
if (ivp == NULL)
return NULL;
vap = &ivp->iv_vap;
ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
vap->iv_bmissthreshold = 10; /* override default */
/* override with driver methods */
ivp->iv_newstate = vap->iv_newstate;
vap->iv_newstate = iwn_newstate;
ieee80211_amrr_init(&ivp->iv_amrr, vap,
IEEE80211_AMRR_MIN_SUCCESS_THRESHOLD,
IEEE80211_AMRR_MAX_SUCCESS_THRESHOLD,
500 /*ms*/);
/* complete setup */
ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status);
ic->ic_opmode = opmode;
return vap;
}
static void
iwn_vap_delete(struct ieee80211vap *vap)
{
struct iwn_vap *ivp = IWN_VAP(vap);
ieee80211_amrr_cleanup(&ivp->iv_amrr);
ieee80211_vap_detach(vap);
free(ivp, M_80211_VAP);
}
static int
iwn_shutdown(device_t dev)
{
struct iwn_softc *sc = device_get_softc(dev);
iwn_stop(sc);
return 0;
}
static int
iwn_suspend(device_t dev)
{
struct iwn_softc *sc = device_get_softc(dev);
iwn_stop(sc);
return 0;
}
static int
iwn_resume(device_t dev)
{
struct iwn_softc *sc = device_get_softc(dev);
struct ifnet *ifp = sc->sc_ifp;
pci_write_config(dev, 0x41, 0, 1);
if (ifp->if_flags & IFF_UP)
iwn_init(sc);
return 0;
}
static void
iwn_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
if (error != 0)
return;
KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs));
*(bus_addr_t *)arg = segs[0].ds_addr;
}
static int
iwn_dma_contig_alloc(struct iwn_softc *sc, struct iwn_dma_info *dma,
void **kvap, bus_size_t size, bus_size_t alignment, int flags)
{
int error, lalignment, i;
/*
* FreeBSD can't guarrenty 16k alignment at the moment (11/2007) so
* we allocate an extra 12k with 4k alignement and walk through
* it trying to find where the alignment is. It's a nasty fix for
* a bigger problem.
*/
DPRINTF(sc, IWN_DEBUG_RESET,
"Size: %zd - alignment %zd\n", size, alignment);
if (alignment == 0x4000) {
size += 12*1024;
lalignment = 4096;
DPRINTF(sc, IWN_DEBUG_RESET, "%s\n",
"Attempting to find a 16k boundary");
} else
lalignment = alignment;
dma->size = size;
dma->tag = NULL;
error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), lalignment,
0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, size,
1, size, flags, NULL, NULL, &dma->tag);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: bus_dma_tag_create failed, error %d\n",
__func__, error);
goto fail;
}
error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr,
flags | BUS_DMA_ZERO, &dma->map);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: bus_dmamem_alloc failed, error %d\n",
__func__, error);
goto fail;
}
if (alignment == 0x4000) {
for (i = 0; i < 3 && (((uintptr_t)dma->vaddr) & 0x3fff); i++) {
DPRINTF(sc, IWN_DEBUG_RESET, "%s\n",
"Memory Unaligned, shifting pointer by 4k");
dma->vaddr += 4096;
size -= 4096;
}
if ((((uintptr_t)dma->vaddr ) & (alignment-1))) {
DPRINTF(sc, IWN_DEBUG_ANY,
"%s: failed to align memory, vaddr %p, align %zd\n",
__func__, dma->vaddr, alignment);
error = ENOMEM;
goto fail;
}
}
error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr,
size, iwn_dma_map_addr, &dma->paddr, flags);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: bus_dmamap_load failed, error %d\n", __func__, error);
goto fail;
}
if (kvap != NULL)
*kvap = dma->vaddr;
return 0;
fail:
iwn_dma_contig_free(dma);
return error;
}
static void
iwn_dma_contig_free(struct iwn_dma_info *dma)
{
if (dma->tag != NULL) {
if (dma->map != NULL) {
if (dma->paddr == 0) {
bus_dmamap_sync(dma->tag, dma->map,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dma->tag, dma->map);
}
bus_dmamem_free(dma->tag, &dma->vaddr, dma->map);
}
bus_dma_tag_destroy(dma->tag);
}
}
int
iwn_alloc_shared(struct iwn_softc *sc)
{
/* must be aligned on a 1KB boundary */
return iwn_dma_contig_alloc(sc, &sc->shared_dma,
(void **)&sc->shared, sizeof (struct iwn_shared), 1024,
BUS_DMA_NOWAIT);
}
void
iwn_free_shared(struct iwn_softc *sc)
{
iwn_dma_contig_free(&sc->shared_dma);
}
int
iwn_alloc_kw(struct iwn_softc *sc)
{
/* must be aligned on a 4k boundary */
return iwn_dma_contig_alloc(sc, &sc->kw_dma, NULL,
PAGE_SIZE, PAGE_SIZE, BUS_DMA_NOWAIT);
}
void
iwn_free_kw(struct iwn_softc *sc)
{
iwn_dma_contig_free(&sc->kw_dma);
}
int
iwn_alloc_fwmem(struct iwn_softc *sc)
{
/* allocate enough contiguous space to store text and data */
return iwn_dma_contig_alloc(sc, &sc->fw_dma, NULL,
IWN_FW_MAIN_TEXT_MAXSZ + IWN_FW_MAIN_DATA_MAXSZ, 16,
BUS_DMA_NOWAIT);
}
void
iwn_free_fwmem(struct iwn_softc *sc)
{
iwn_dma_contig_free(&sc->fw_dma);
}
int
iwn_alloc_rx_ring(struct iwn_softc *sc, struct iwn_rx_ring *ring)
{
int i, error;
ring->cur = 0;
error = iwn_dma_contig_alloc(sc, &ring->desc_dma,
(void **)&ring->desc, IWN_RX_RING_COUNT * sizeof (uint32_t),
IWN_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not allocate rx ring DMA memory, error %d\n",
__func__, error);
goto fail;
}
error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT,
BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1,
MJUMPAGESIZE, BUS_DMA_NOWAIT, NULL, NULL, &ring->data_dmat);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: bus_dma_tag_create_failed, error %d\n",
__func__, error);
goto fail;
}
/*
* Setup Rx buffers.
*/
for (i = 0; i < IWN_RX_RING_COUNT; i++) {
struct iwn_rx_data *data = &ring->data[i];
struct mbuf *m;
bus_addr_t paddr;
error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: bus_dmamap_create failed, error %d\n",
__func__, error);
goto fail;
}
m = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
if (m == NULL) {
device_printf(sc->sc_dev,
"%s: could not allocate rx mbuf\n", __func__);
error = ENOMEM;
goto fail;
}
/* map page */
error = bus_dmamap_load(ring->data_dmat, data->map,
mtod(m, caddr_t), MJUMPAGESIZE,
iwn_dma_map_addr, &paddr, BUS_DMA_NOWAIT);
if (error != 0 && error != EFBIG) {
device_printf(sc->sc_dev,
"%s: bus_dmamap_load failed, error %d\n",
__func__, error);
m_freem(m);
error = ENOMEM; /* XXX unique code */
goto fail;
}
bus_dmamap_sync(ring->data_dmat, data->map,
BUS_DMASYNC_PREWRITE);
data->m = m;
/* Rx buffers are aligned on a 256-byte boundary */
ring->desc[i] = htole32(paddr >> 8);
}
bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
BUS_DMASYNC_PREWRITE);
return 0;
fail:
iwn_free_rx_ring(sc, ring);
return error;
}
void
iwn_reset_rx_ring(struct iwn_softc *sc, struct iwn_rx_ring *ring)
{
int ntries;
iwn_mem_lock(sc);
IWN_WRITE(sc, IWN_RX_CONFIG, 0);
for (ntries = 0; ntries < 100; ntries++) {
if (IWN_READ(sc, IWN_RX_STATUS) & IWN_RX_IDLE)
break;
DELAY(10);
}
#ifdef IWN_DEBUG
if (ntries == 100)
DPRINTF(sc, IWN_DEBUG_ANY, "%s\n", "timeout resetting Rx ring");
#endif
iwn_mem_unlock(sc);
ring->cur = 0;
}
void
iwn_free_rx_ring(struct iwn_softc *sc, struct iwn_rx_ring *ring)
{
int i;
iwn_dma_contig_free(&ring->desc_dma);
for (i = 0; i < IWN_RX_RING_COUNT; i++)
if (ring->data[i].m != NULL)
m_freem(ring->data[i].m);
}
int
iwn_alloc_tx_ring(struct iwn_softc *sc, struct iwn_tx_ring *ring, int qid)
{
bus_size_t size;
int i, error;
ring->qid = qid;
ring->queued = 0;
ring->cur = 0;
size = IWN_TX_RING_COUNT * sizeof(struct iwn_tx_desc);
error = iwn_dma_contig_alloc(sc, &ring->desc_dma,
(void **)&ring->desc, size, IWN_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not allocate tx ring DMA memory, error %d\n",
__func__, error);
goto fail;
}
size = IWN_TX_RING_COUNT * sizeof(struct iwn_tx_cmd);
error = iwn_dma_contig_alloc(sc, &ring->cmd_dma,
(void **)&ring->cmd, size, 4, BUS_DMA_NOWAIT);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not allocate tx cmd DMA memory, error %d\n",
__func__, error);
goto fail;
}
error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT,
BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, IWN_MAX_SCATTER - 1,
MCLBYTES, BUS_DMA_NOWAIT, NULL, NULL, &ring->data_dmat);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: bus_dma_tag_create_failed, error %d\n",
__func__, error);
goto fail;
}
for (i = 0; i < IWN_TX_RING_COUNT; i++) {
struct iwn_tx_data *data = &ring->data[i];
error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: bus_dmamap_create failed, error %d\n",
__func__, error);
goto fail;
}
bus_dmamap_sync(ring->data_dmat, data->map,
BUS_DMASYNC_PREWRITE);
}
return 0;
fail:
iwn_free_tx_ring(sc, ring);
return error;
}
void
iwn_reset_tx_ring(struct iwn_softc *sc, struct iwn_tx_ring *ring)
{
uint32_t tmp;
int i, ntries;
iwn_mem_lock(sc);
IWN_WRITE(sc, IWN_TX_CONFIG(ring->qid), 0);
for (ntries = 0; ntries < 20; ntries++) {
tmp = IWN_READ(sc, IWN_TX_STATUS);
if ((tmp & IWN_TX_IDLE(ring->qid)) == IWN_TX_IDLE(ring->qid))
break;
DELAY(10);
}
#ifdef IWN_DEBUG
if (ntries == 20)
DPRINTF(sc, IWN_DEBUG_RESET,
"%s: timeout resetting Tx ring %d\n", __func__, ring->qid);
#endif
iwn_mem_unlock(sc);
for (i = 0; i < IWN_TX_RING_COUNT; i++) {
struct iwn_tx_data *data = &ring->data[i];
if (data->m != NULL) {
bus_dmamap_unload(ring->data_dmat, data->map);
m_freem(data->m);
data->m = NULL;
}
}
ring->queued = 0;
ring->cur = 0;
}
void
iwn_free_tx_ring(struct iwn_softc *sc, struct iwn_tx_ring *ring)
{
int i;
iwn_dma_contig_free(&ring->desc_dma);
iwn_dma_contig_free(&ring->cmd_dma);
if (ring->data != NULL) {
for (i = 0; i < IWN_TX_RING_COUNT; i++) {
struct iwn_tx_data *data = &ring->data[i];
if (data->m != NULL) {
bus_dmamap_unload(ring->data_dmat, data->map);
m_freem(data->m);
}
}
}
}
struct ieee80211_node *
iwn_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
{
return malloc(sizeof (struct iwn_node), M_80211_NODE,M_NOWAIT | M_ZERO);
}
void
iwn_newassoc(struct ieee80211_node *ni, int isnew)
{
struct ieee80211vap *vap = ni->ni_vap;
ieee80211_amrr_node_init(&IWN_VAP(vap)->iv_amrr,
&IWN_NODE(ni)->amn, ni);
}
int
iwn_media_change(struct ifnet *ifp)
{
int error = ieee80211_media_change(ifp);
/* NB: only the fixed rate can change and that doesn't need a reset */
return (error == ENETRESET ? 0 : error);
}
int
iwn_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
struct iwn_vap *ivp = IWN_VAP(vap);
struct ieee80211com *ic = vap->iv_ic;
struct iwn_softc *sc = ic->ic_ifp->if_softc;
int error;
DPRINTF(sc, IWN_DEBUG_STATE, "%s: %s -> %s\n", __func__,
ieee80211_state_name[vap->iv_state],
ieee80211_state_name[nstate]);
IEEE80211_UNLOCK(ic);
IWN_LOCK(sc);
callout_stop(&sc->sc_timer_to);
if (nstate == IEEE80211_S_AUTH && vap->iv_state != IEEE80211_S_AUTH) {
/* !AUTH -> AUTH requires adapter config */
error = iwn_auth(sc, vap);
}
if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) {
/*
* !RUN -> RUN requires setting the association id
* which is done with a firmware cmd. We also defer
* starting the timers until that work is done.
*/
error = iwn_run(sc, vap);
}
if (nstate == IEEE80211_S_RUN) {
/*
* RUN -> RUN transition; just restart the timers.
*/
iwn_calib_reset(sc);
}
IWN_UNLOCK(sc);
IEEE80211_LOCK(ic);
return ivp->iv_newstate(vap, nstate, arg);
}
/*
* Grab exclusive access to NIC memory.
*/
void
iwn_mem_lock(struct iwn_softc *sc)
{
uint32_t tmp;
int ntries;
tmp = IWN_READ(sc, IWN_GPIO_CTL);
IWN_WRITE(sc, IWN_GPIO_CTL, tmp | IWN_GPIO_MAC);
/* spin until we actually get the lock */
for (ntries = 0; ntries < 1000; ntries++) {
if ((IWN_READ(sc, IWN_GPIO_CTL) &
(IWN_GPIO_CLOCK | IWN_GPIO_SLEEP)) == IWN_GPIO_CLOCK)
break;
DELAY(10);
}
if (ntries == 1000)
device_printf(sc->sc_dev,
"%s: could not lock memory\n", __func__);
}
/*
* Release lock on NIC memory.
*/
void
iwn_mem_unlock(struct iwn_softc *sc)
{
uint32_t tmp = IWN_READ(sc, IWN_GPIO_CTL);
IWN_WRITE(sc, IWN_GPIO_CTL, tmp & ~IWN_GPIO_MAC);
}
uint32_t
iwn_mem_read(struct iwn_softc *sc, uint32_t addr)
{
IWN_WRITE(sc, IWN_READ_MEM_ADDR, IWN_MEM_4 | addr);
return IWN_READ(sc, IWN_READ_MEM_DATA);
}
void
iwn_mem_write(struct iwn_softc *sc, uint32_t addr, uint32_t data)
{
IWN_WRITE(sc, IWN_WRITE_MEM_ADDR, IWN_MEM_4 | addr);
IWN_WRITE(sc, IWN_WRITE_MEM_DATA, data);
}
void
iwn_mem_write_region_4(struct iwn_softc *sc, uint32_t addr,
const uint32_t *data, int wlen)
{
for (; wlen > 0; wlen--, data++, addr += 4)
iwn_mem_write(sc, addr, *data);
}
int
iwn_eeprom_lock(struct iwn_softc *sc)
{
uint32_t tmp;
int ntries;
tmp = IWN_READ(sc, IWN_HWCONFIG);
IWN_WRITE(sc, IWN_HWCONFIG, tmp | IWN_HW_EEPROM_LOCKED);
/* spin until we actually get the lock */
for (ntries = 0; ntries < 100; ntries++) {
if (IWN_READ(sc, IWN_HWCONFIG) & IWN_HW_EEPROM_LOCKED)
return 0;
DELAY(10);
}
return ETIMEDOUT;
}
void
iwn_eeprom_unlock(struct iwn_softc *sc)
{
uint32_t tmp = IWN_READ(sc, IWN_HWCONFIG);
IWN_WRITE(sc, IWN_HWCONFIG, tmp & ~IWN_HW_EEPROM_LOCKED);
}
/*
* Read `len' bytes from the EEPROM. We access the EEPROM through the MAC
* instead of using the traditional bit-bang method.
*/
int
iwn_read_prom_data(struct iwn_softc *sc, uint32_t addr, void *data, int len)
{
uint8_t *out = data;
uint32_t val;
int ntries, tmp;
iwn_mem_lock(sc);
for (; len > 0; len -= 2, addr++) {
IWN_WRITE(sc, IWN_EEPROM_CTL, addr << 2);
tmp = IWN_READ(sc, IWN_EEPROM_CTL);
IWN_WRITE(sc, IWN_EEPROM_CTL, tmp & ~IWN_EEPROM_MSK );
for (ntries = 0; ntries < 10; ntries++) {
if ((val = IWN_READ(sc, IWN_EEPROM_CTL)) &
IWN_EEPROM_READY)
break;
DELAY(5);
}
if (ntries == 10) {
device_printf(sc->sc_dev,"could not read EEPROM\n");
return ETIMEDOUT;
}
*out++ = val >> 16;
if (len > 1)
*out++ = val >> 24;
}
iwn_mem_unlock(sc);
return 0;
}
/*
* The firmware boot code is small and is intended to be copied directly into
* the NIC internal memory.
*/
int
iwn_transfer_microcode(struct iwn_softc *sc, const uint8_t *ucode, int size)
{
int ntries;
size /= sizeof (uint32_t);
iwn_mem_lock(sc);
/* copy microcode image into NIC memory */
iwn_mem_write_region_4(sc, IWN_MEM_UCODE_BASE,
(const uint32_t *)ucode, size);
iwn_mem_write(sc, IWN_MEM_UCODE_SRC, 0);
iwn_mem_write(sc, IWN_MEM_UCODE_DST, IWN_FW_TEXT);
iwn_mem_write(sc, IWN_MEM_UCODE_SIZE, size);
/* run microcode */
iwn_mem_write(sc, IWN_MEM_UCODE_CTL, IWN_UC_RUN);
/* wait for transfer to complete */
for (ntries = 0; ntries < 1000; ntries++) {
if (!(iwn_mem_read(sc, IWN_MEM_UCODE_CTL) & IWN_UC_RUN))
break;
DELAY(10);
}
if (ntries == 1000) {
iwn_mem_unlock(sc);
device_printf(sc->sc_dev,
"%s: could not load boot firmware\n", __func__);
return ETIMEDOUT;
}
iwn_mem_write(sc, IWN_MEM_UCODE_CTL, IWN_UC_ENABLE);
iwn_mem_unlock(sc);
return 0;
}
int
iwn_load_firmware(struct iwn_softc *sc)
{
int error;
KASSERT(sc->fw_fp == NULL, ("firmware already loaded"));
IWN_UNLOCK(sc);
/* load firmware image from disk */
sc->fw_fp = firmware_get("iwnfw");
if (sc->fw_fp == NULL) {
device_printf(sc->sc_dev,
"%s: could not load firmare image \"iwnfw\"\n", __func__);
error = EINVAL;
} else
error = 0;
IWN_LOCK(sc);
return error;
}
int
iwn_transfer_firmware(struct iwn_softc *sc)
{
struct iwn_dma_info *dma = &sc->fw_dma;
const struct iwn_firmware_hdr *hdr;
const uint8_t *init_text, *init_data, *main_text, *main_data;
const uint8_t *boot_text;
uint32_t init_textsz, init_datasz, main_textsz, main_datasz;
uint32_t boot_textsz;
int error = 0;
const struct firmware *fp = sc->fw_fp;
/* extract firmware header information */
if (fp->datasize < sizeof (struct iwn_firmware_hdr)) {
device_printf(sc->sc_dev,
"%s: truncated firmware header: %zu bytes, expecting %zu\n",
__func__, fp->datasize, sizeof (struct iwn_firmware_hdr));
error = EINVAL;
goto fail;
}
hdr = (const struct iwn_firmware_hdr *)fp->data;
main_textsz = le32toh(hdr->main_textsz);
main_datasz = le32toh(hdr->main_datasz);
init_textsz = le32toh(hdr->init_textsz);
init_datasz = le32toh(hdr->init_datasz);
boot_textsz = le32toh(hdr->boot_textsz);
/* sanity-check firmware segments sizes */
if (main_textsz > IWN_FW_MAIN_TEXT_MAXSZ ||
main_datasz > IWN_FW_MAIN_DATA_MAXSZ ||
init_textsz > IWN_FW_INIT_TEXT_MAXSZ ||
init_datasz > IWN_FW_INIT_DATA_MAXSZ ||
boot_textsz > IWN_FW_BOOT_TEXT_MAXSZ ||
(boot_textsz & 3) != 0) {
device_printf(sc->sc_dev,
"%s: invalid firmware header, main [%d,%d], init [%d,%d] "
"boot %d\n", __func__, main_textsz, main_datasz,
init_textsz, init_datasz, boot_textsz);
error = EINVAL;
goto fail;
}
/* check that all firmware segments are present */
if (fp->datasize < sizeof (struct iwn_firmware_hdr) + main_textsz +
main_datasz + init_textsz + init_datasz + boot_textsz) {
device_printf(sc->sc_dev, "%s: firmware file too short: "
"%zu bytes, main [%d, %d], init [%d,%d] boot %d\n",
__func__, fp->datasize, main_textsz, main_datasz,
init_textsz, init_datasz, boot_textsz);
error = EINVAL;
goto fail;
}
/* get pointers to firmware segments */
main_text = (const uint8_t *)(hdr + 1);
main_data = main_text + main_textsz;
init_text = main_data + main_datasz;
init_data = init_text + init_textsz;
boot_text = init_data + init_datasz;
/* copy initialization images into pre-allocated DMA-safe memory */
memcpy(dma->vaddr, init_data, init_datasz);
memcpy(dma->vaddr + IWN_FW_INIT_DATA_MAXSZ, init_text, init_textsz);
/* tell adapter where to find initialization images */
iwn_mem_lock(sc);
iwn_mem_write(sc, IWN_MEM_DATA_BASE, dma->paddr >> 4);
iwn_mem_write(sc, IWN_MEM_DATA_SIZE, init_datasz);
iwn_mem_write(sc, IWN_MEM_TEXT_BASE,
(dma->paddr + IWN_FW_INIT_DATA_MAXSZ) >> 4);
iwn_mem_write(sc, IWN_MEM_TEXT_SIZE, init_textsz);
iwn_mem_unlock(sc);
/* load firmware boot code */
error = iwn_transfer_microcode(sc, boot_text, boot_textsz);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not load boot firmware, error %d\n",
__func__, error);
goto fail;
}
/* now press "execute" ;-) */
IWN_WRITE(sc, IWN_RESET, 0);
/* wait at most one second for first alive notification */
error = msleep(sc, &sc->sc_mtx, PCATCH, "iwninit", hz);
if (error != 0) {
/* this isn't what was supposed to happen.. */
device_printf(sc->sc_dev,
"%s: timeout waiting for first alive notice, error %d\n",
__func__, error);
goto fail;
}
/* copy runtime images into pre-allocated DMA-safe memory */
memcpy(dma->vaddr, main_data, main_datasz);
memcpy(dma->vaddr + IWN_FW_MAIN_DATA_MAXSZ, main_text, main_textsz);
/* tell adapter where to find runtime images */
iwn_mem_lock(sc);
iwn_mem_write(sc, IWN_MEM_DATA_BASE, dma->paddr >> 4);
iwn_mem_write(sc, IWN_MEM_DATA_SIZE, main_datasz);
iwn_mem_write(sc, IWN_MEM_TEXT_BASE,
(dma->paddr + IWN_FW_MAIN_DATA_MAXSZ) >> 4);
iwn_mem_write(sc, IWN_MEM_TEXT_SIZE, IWN_FW_UPDATED | main_textsz);
iwn_mem_unlock(sc);
/* wait at most one second for second alive notification */
error = msleep(sc, &sc->sc_mtx, PCATCH, "iwninit", hz);
if (error != 0) {
/* this isn't what was supposed to happen.. */
device_printf(sc->sc_dev,
"%s: timeout waiting for second alive notice, error %d\n",
__func__, error);
goto fail;
}
return 0;
fail:
return error;
}
void
iwn_unload_firmware(struct iwn_softc *sc)
{
if (sc->fw_fp != NULL) {
firmware_put(sc->fw_fp, FIRMWARE_UNLOAD);
sc->fw_fp = NULL;
}
}
static void
iwn_timer_timeout(void *arg)
{
struct iwn_softc *sc = arg;
IWN_LOCK_ASSERT(sc);
if (sc->calib_cnt && --sc->calib_cnt == 0) {
DPRINTF(sc, IWN_DEBUG_CALIBRATE, "%s\n",
"send statistics request");
(void) iwn_cmd(sc, IWN_CMD_GET_STATISTICS, NULL, 0, 1);
sc->calib_cnt = 60; /* do calibration every 60s */
}
iwn_watchdog(sc); /* NB: piggyback tx watchdog */
callout_reset(&sc->sc_timer_to, hz, iwn_timer_timeout, sc);
}
static void
iwn_calib_reset(struct iwn_softc *sc)
{
callout_reset(&sc->sc_timer_to, hz, iwn_timer_timeout, sc);
sc->calib_cnt = 60; /* do calibration every 60s */
}
void
iwn_ampdu_rx_start(struct iwn_softc *sc, struct iwn_rx_desc *desc)
{
struct iwn_rx_stat *stat;
DPRINTF(sc, IWN_DEBUG_RECV, "%s\n", "received AMPDU stats");
/* save Rx statistics, they will be used on IWN_AMPDU_RX_DONE */
stat = (struct iwn_rx_stat *)(desc + 1);
memcpy(&sc->last_rx_stat, stat, sizeof (*stat));
sc->last_rx_valid = 1;
}
static __inline int
maprate(int iwnrate)
{
switch (iwnrate) {
/* CCK rates */
case 10: return 2;
case 20: return 4;
case 55: return 11;
case 110: return 22;
/* OFDM rates */
case 0xd: return 12;
case 0xf: return 18;
case 0x5: return 24;
case 0x7: return 36;
case 0x9: return 48;
case 0xb: return 72;
case 0x1: return 96;
case 0x3: return 108;
/* XXX MCS */
}
/* unknown rate: should not happen */
return 0;
}
void
iwn_rx_intr(struct iwn_softc *sc, struct iwn_rx_desc *desc,
struct iwn_rx_data *data)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct iwn_rx_ring *ring = &sc->rxq;
struct ieee80211_frame *wh;
struct ieee80211_node *ni;
struct mbuf *m, *mnew;
struct iwn_rx_stat *stat;
caddr_t head;
uint32_t *tail;
int8_t rssi, nf;
int len, error;
bus_addr_t paddr;
if (desc->type == IWN_AMPDU_RX_DONE) {
/* check for prior AMPDU_RX_START */
if (!sc->last_rx_valid) {
DPRINTF(sc, IWN_DEBUG_ANY,
"%s: missing AMPDU_RX_START\n", __func__);
ifp->if_ierrors++;
return;
}
sc->last_rx_valid = 0;
stat = &sc->last_rx_stat;
} else
stat = (struct iwn_rx_stat *)(desc + 1);
if (stat->cfg_phy_len > IWN_STAT_MAXLEN) {
device_printf(sc->sc_dev,
"%s: invalid rx statistic header, len %d\n",
__func__, stat->cfg_phy_len);
ifp->if_ierrors++;
return;
}
if (desc->type == IWN_AMPDU_RX_DONE) {
struct iwn_rx_ampdu *ampdu = (struct iwn_rx_ampdu *)(desc + 1);
head = (caddr_t)(ampdu + 1);
len = le16toh(ampdu->len);
} else {
head = (caddr_t)(stat + 1) + stat->cfg_phy_len;
len = le16toh(stat->len);
}
/* discard Rx frames with bad CRC early */
tail = (uint32_t *)(head + len);
if ((le32toh(*tail) & IWN_RX_NOERROR) != IWN_RX_NOERROR) {
DPRINTF(sc, IWN_DEBUG_RECV, "%s: rx flags error %x\n",
__func__, le32toh(*tail));
ifp->if_ierrors++;
return;
}
if (len < sizeof (struct ieee80211_frame)) {
DPRINTF(sc, IWN_DEBUG_RECV, "%s: frame too short: %d\n",
__func__, len);
ifp->if_ierrors++;
return;
}
/* XXX don't need mbuf, just dma buffer */
mnew = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
if (mnew == NULL) {
DPRINTF(sc, IWN_DEBUG_ANY, "%s: no mbuf to restock ring\n",
__func__);
ifp->if_ierrors++;
return;
}
error = bus_dmamap_load(ring->data_dmat, data->map,
mtod(mnew, caddr_t), MJUMPAGESIZE,
iwn_dma_map_addr, &paddr, BUS_DMA_NOWAIT);
if (error != 0 && error != EFBIG) {
device_printf(sc->sc_dev,
"%s: bus_dmamap_load failed, error %d\n", __func__, error);
m_freem(mnew);
ifp->if_ierrors++;
return;
}
bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
/* finalize mbuf and swap in new one */
m = data->m;
m->m_pkthdr.rcvif = ifp;
m->m_data = head;
m->m_pkthdr.len = m->m_len = len;
data->m = mnew;
/* update Rx descriptor */
ring->desc[ring->cur] = htole32(paddr >> 8);
rssi = iwn_get_rssi(sc, stat);
/* grab a reference to the source node */
wh = mtod(m, struct ieee80211_frame *);
ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh);
nf = (ni != NULL && ni->ni_vap->iv_state == IEEE80211_S_RUN &&
(ic->ic_flags & IEEE80211_F_SCAN) == 0) ? sc->noise : -95;
if (bpf_peers_present(ifp->if_bpf)) {
struct iwn_rx_radiotap_header *tap = &sc->sc_rxtap;
tap->wr_flags = 0;
tap->wr_dbm_antsignal = rssi;
tap->wr_dbm_antnoise = nf;
tap->wr_rate = maprate(stat->rate);
tap->wr_tsft = htole64(stat->tstamp);
if (stat->flags & htole16(IWN_CONFIG_SHPREAMBLE))
tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
bpf_mtap2(ifp->if_bpf, tap, sc->sc_rxtap_len, m);
}
IWN_UNLOCK(sc);
/* send the frame to the 802.11 layer */
if (ni != NULL) {
(void) ieee80211_input(ni, m, rssi - nf, nf, 0);
ieee80211_free_node(ni);
} else
(void) ieee80211_input_all(ic, m, rssi - nf, nf, 0);
IWN_LOCK(sc);
}
void
iwn_rx_statistics(struct iwn_softc *sc, struct iwn_rx_desc *desc)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
struct iwn_calib_state *calib = &sc->calib;
struct iwn_stats *stats = (struct iwn_stats *)(desc + 1);
/* beacon stats are meaningful only when associated and not scanning */
if (vap->iv_state != IEEE80211_S_RUN ||
(ic->ic_flags & IEEE80211_F_SCAN))
return;
DPRINTF(sc, IWN_DEBUG_CALIBRATE, "%s: cmd %d\n", __func__, desc->type);
iwn_calib_reset(sc);
/* test if temperature has changed */
if (stats->general.temp != sc->rawtemp) {
int temp;
sc->rawtemp = stats->general.temp;
temp = iwn_get_temperature(sc);
DPRINTF(sc, IWN_DEBUG_CALIBRATE, "%s: temperature %d\n",
__func__, temp);
/* update Tx power if need be */
iwn_power_calibration(sc, temp);
}
if (desc->type != IWN_BEACON_STATISTICS)
return; /* reply to a statistics request */
sc->noise = iwn_get_noise(&stats->rx.general);
DPRINTF(sc, IWN_DEBUG_CALIBRATE, "%s: noise %d\n", __func__, sc->noise);
/* test that RSSI and noise are present in stats report */
if (stats->rx.general.flags != htole32(1)) {
DPRINTF(sc, IWN_DEBUG_ANY, "%s\n",
"received statistics without RSSI");
return;
}
if (calib->state == IWN_CALIB_STATE_ASSOC)
iwn_compute_differential_gain(sc, &stats->rx.general);
else if (calib->state == IWN_CALIB_STATE_RUN)
iwn_tune_sensitivity(sc, &stats->rx);
}
void
iwn_tx_intr(struct iwn_softc *sc, struct iwn_rx_desc *desc)
{
struct ifnet *ifp = sc->sc_ifp;
struct iwn_tx_ring *ring = &sc->txq[desc->qid & 0xf];
struct iwn_tx_data *data = &ring->data[desc->idx];
struct iwn_tx_stat *stat = (struct iwn_tx_stat *)(desc + 1);
struct iwn_node *wn = IWN_NODE(data->ni);
struct mbuf *m;
struct ieee80211_node *ni;
uint32_t status;
KASSERT(data->ni != NULL, ("no node"));
DPRINTF(sc, IWN_DEBUG_XMIT, "%s: "
"qid %d idx %d retries %d nkill %d rate %x duration %d status %x\n",
__func__, desc->qid, desc->idx, stat->ntries,
stat->nkill, stat->rate, le16toh(stat->duration),
le32toh(stat->status));
/*
* Update rate control statistics for the node.
*/
status = le32toh(stat->status) & 0xff;
if (status & 0x80) {
DPRINTF(sc, IWN_DEBUG_ANY, "%s: status 0x%x\n",
__func__, le32toh(stat->status));
ifp->if_oerrors++;
ieee80211_amrr_tx_complete(&wn->amn,
IEEE80211_AMRR_FAILURE, stat->ntries);
} else {
ieee80211_amrr_tx_complete(&wn->amn,
IEEE80211_AMRR_SUCCESS, stat->ntries);
}
bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(ring->data_dmat, data->map);
m = data->m, data->m = NULL;
ni = data->ni, data->ni = NULL;
if (m->m_flags & M_TXCB) {
/*
* Channels marked for "radar" require traffic to be received
* to unlock before we can transmit. Until traffic is seen
* any attempt to transmit is returned immediately with status
* set to IWN_TX_FAIL_TX_LOCKED. Unfortunately this can easily
* happen on first authenticate after scanning. To workaround
* this we ignore a failure of this sort in AUTH state so the
* 802.11 layer will fall back to using a timeout to wait for
* the AUTH reply. This allows the firmware time to see
* traffic so a subsequent retry of AUTH succeeds. It's
* unclear why the firmware does not maintain state for
* channels recently visited as this would allow immediate
* use of the channel after a scan (where we see traffic).
*/
if (status == IWN_TX_FAIL_TX_LOCKED &&
ni->ni_vap->iv_state == IEEE80211_S_AUTH)
ieee80211_process_callback(ni, m, 0);
else
ieee80211_process_callback(ni, m,
(status & IWN_TX_FAIL) != 0);
}
m_freem(m);
ieee80211_free_node(ni);
ring->queued--;
sc->sc_tx_timer = 0;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
iwn_start_locked(ifp);
}
void
iwn_cmd_intr(struct iwn_softc *sc, struct iwn_rx_desc *desc)
{
struct iwn_tx_ring *ring = &sc->txq[4];
struct iwn_tx_data *data;
if ((desc->qid & 0xf) != 4)
return; /* not a command ack */
data = &ring->data[desc->idx];
/* if the command was mapped in a mbuf, free it */
if (data->m != NULL) {
bus_dmamap_unload(ring->data_dmat, data->map);
m_freem(data->m);
data->m = NULL;
}
wakeup(&ring->cmd[desc->idx]);
}
void
iwn_notif_intr(struct iwn_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
uint16_t hw;
hw = le16toh(sc->shared->closed_count) & 0xfff;
while (sc->rxq.cur != hw) {
struct iwn_rx_data *data = &sc->rxq.data[sc->rxq.cur];
struct iwn_rx_desc *desc = (void *)data->m->m_ext.ext_buf;
DPRINTF(sc, IWN_DEBUG_RECV,
"%s: qid %x idx %d flags %x type %d(%s) len %d\n",
__func__, desc->qid, desc->idx, desc->flags,
desc->type, iwn_intr_str(desc->type),
le16toh(desc->len));
if (!(desc->qid & 0x80)) /* reply to a command */
iwn_cmd_intr(sc, desc);
switch (desc->type) {
case IWN_RX_DONE:
case IWN_AMPDU_RX_DONE:
iwn_rx_intr(sc, desc, data);
break;
case IWN_AMPDU_RX_START:
iwn_ampdu_rx_start(sc, desc);
break;
case IWN_TX_DONE:
/* a 802.11 frame has been transmitted */
iwn_tx_intr(sc, desc);
break;
case IWN_RX_STATISTICS:
case IWN_BEACON_STATISTICS:
iwn_rx_statistics(sc, desc);
break;
case IWN_BEACON_MISSED: {
struct iwn_beacon_missed *miss =
(struct iwn_beacon_missed *)(desc + 1);
int misses = le32toh(miss->consecutive);
/* XXX not sure why we're notified w/ zero */
if (misses == 0)
break;
DPRINTF(sc, IWN_DEBUG_STATE,
"%s: beacons missed %d/%d\n", __func__,
misses, le32toh(miss->total));
/*
* If more than 5 consecutive beacons are missed,
* reinitialize the sensitivity state machine.
*/
if (vap->iv_state == IEEE80211_S_RUN && misses > 5)
(void) iwn_init_sensitivity(sc);
if (misses >= vap->iv_bmissthreshold)
ieee80211_beacon_miss(ic);
break;
}
case IWN_UC_READY: {
struct iwn_ucode_info *uc =
(struct iwn_ucode_info *)(desc + 1);
/* the microcontroller is ready */
DPRINTF(sc, IWN_DEBUG_RESET,
"microcode alive notification version=%d.%d "
"subtype=%x alive=%x\n", uc->major, uc->minor,
uc->subtype, le32toh(uc->valid));
if (le32toh(uc->valid) != 1) {
device_printf(sc->sc_dev,
"microcontroller initialization failed");
break;
}
if (uc->subtype == IWN_UCODE_INIT) {
/* save microcontroller's report */
memcpy(&sc->ucode_info, uc, sizeof (*uc));
}
break;
}
case IWN_STATE_CHANGED: {
uint32_t *status = (uint32_t *)(desc + 1);
/*
* State change allows hardware switch change to be
* noted. However, we handle this in iwn_intr as we
* get both the enable/disble intr.
*/
DPRINTF(sc, IWN_DEBUG_INTR, "state changed to %x\n",
le32toh(*status));
break;
}
case IWN_START_SCAN: {
struct iwn_start_scan *scan =
(struct iwn_start_scan *)(desc + 1);
DPRINTF(sc, IWN_DEBUG_ANY,
"%s: scanning channel %d status %x\n",
__func__, scan->chan, le32toh(scan->status));
break;
}
case IWN_STOP_SCAN: {
struct iwn_stop_scan *scan =
(struct iwn_stop_scan *)(desc + 1);
DPRINTF(sc, IWN_DEBUG_STATE,
"scan finished nchan=%d status=%d chan=%d\n",
scan->nchan, scan->status, scan->chan);
ieee80211_scan_next(vap);
break;
}
}
sc->rxq.cur = (sc->rxq.cur + 1) % IWN_RX_RING_COUNT;
}
/* tell the firmware what we have processed */
hw = (hw == 0) ? IWN_RX_RING_COUNT - 1 : hw - 1;
IWN_WRITE(sc, IWN_RX_WIDX, hw & ~7);
}
static void
iwn_rftoggle_intr(struct iwn_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
uint32_t tmp = IWN_READ(sc, IWN_GPIO_CTL);
IWN_LOCK_ASSERT(sc);
device_printf(sc->sc_dev, "RF switch: radio %s\n",
(tmp & IWN_GPIO_RF_ENABLED) ? "enabled" : "disabled");
if (tmp & IWN_GPIO_RF_ENABLED)
ieee80211_runtask(ic, &sc->sc_radioon_task);
else
ieee80211_runtask(ic, &sc->sc_radiooff_task);
}
static void
iwn_error_intr(struct iwn_softc *sc, uint32_t r1, uint32_t r2)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
IWN_LOCK_ASSERT(sc);
device_printf(sc->sc_dev, "error, INTR=%b STATUS=0x%x\n",
r1, IWN_INTR_BITS, r2);
ieee80211_runtask(ic, &sc->sc_reinit_task);
}
void
iwn_intr(void *arg)
{
struct iwn_softc *sc = arg;
uint32_t r1, r2;
IWN_LOCK(sc);
/* disable interrupts */
IWN_WRITE(sc, IWN_MASK, 0);
r1 = IWN_READ(sc, IWN_INTR);
r2 = IWN_READ(sc, IWN_INTR_STATUS);
if (r1 == 0 && r2 == 0) {
IWN_WRITE(sc, IWN_MASK, IWN_INTR_MASK);
goto done; /* not for us */
}
if (r1 == 0xffffffff)
goto done; /* hardware gone */
/* ack interrupts */
IWN_WRITE(sc, IWN_INTR, r1);
IWN_WRITE(sc, IWN_INTR_STATUS, r2);
DPRINTF(sc, IWN_DEBUG_INTR, "interrupt reg1=%x reg2=%x\n", r1, r2);
if (r1 & IWN_RF_TOGGLED)
iwn_rftoggle_intr(sc);
if (r1 & IWN_CT_REACHED)
device_printf(sc->sc_dev, "critical temperature reached!\n");
if (r1 & (IWN_SW_ERROR | IWN_HW_ERROR)) {
iwn_error_intr(sc, r1, r2);
goto done;
}
if ((r1 & (IWN_RX_INTR | IWN_SW_RX_INTR)) || (r2 & IWN_RX_STATUS_INTR))
iwn_notif_intr(sc);
if (r1 & IWN_ALIVE_INTR)
wakeup(sc);
/* re-enable interrupts */
IWN_WRITE(sc, IWN_MASK, IWN_INTR_MASK);
done:
IWN_UNLOCK(sc);
}
uint8_t
iwn_plcp_signal(int rate)
{
switch (rate) {
/* CCK rates (returned values are device-dependent) */
case 2: return 10;
case 4: return 20;
case 11: return 55;
case 22: return 110;
/* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
/* R1-R4, (u)ral is R4-R1 */
case 12: return 0xd;
case 18: return 0xf;
case 24: return 0x5;
case 36: return 0x7;
case 48: return 0x9;
case 72: return 0xb;
case 96: return 0x1;
case 108: return 0x3;
case 120: return 0x3;
}
/* unknown rate (should not get there) */
return 0;
}
/* determine if a given rate is CCK or OFDM */
#define IWN_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22)
int
iwn_tx_data(struct iwn_softc *sc, struct mbuf *m0, struct ieee80211_node *ni,
struct iwn_tx_ring *ring)
{
struct ieee80211vap *vap = ni->ni_vap;
struct ieee80211com *ic = ni->ni_ic;
struct ifnet *ifp = sc->sc_ifp;
const struct ieee80211_txparam *tp;
struct iwn_tx_desc *desc;
struct iwn_tx_data *data;
struct iwn_tx_cmd *cmd;
struct iwn_cmd_data *tx;
struct ieee80211_frame *wh;
struct ieee80211_key *k;
bus_addr_t paddr;
uint32_t flags;
uint16_t timeout;
uint8_t type;
u_int hdrlen;
struct mbuf *mnew;
int rate, error, pad, nsegs, i, ismcast, id;
bus_dma_segment_t segs[IWN_MAX_SCATTER];
IWN_LOCK_ASSERT(sc);
wh = mtod(m0, struct ieee80211_frame *);
type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
hdrlen = ieee80211_anyhdrsize(wh);
/* pick a tx rate */
/* XXX ni_chan */
tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
if (type == IEEE80211_FC0_TYPE_MGT)
rate = tp->mgmtrate;
else if (ismcast)
rate = tp->mcastrate;
else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE)
rate = tp->ucastrate;
else {
(void) ieee80211_amrr_choose(ni, &IWN_NODE(ni)->amn);
rate = ni->ni_txrate;
}
if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
k = ieee80211_crypto_encap(ni, m0);
if (k == NULL) {
m_freem(m0);
return ENOBUFS;
}
/* packet header may have moved, reset our local pointer */
wh = mtod(m0, struct ieee80211_frame *);
} else
k = NULL;
if (bpf_peers_present(ifp->if_bpf)) {
struct iwn_tx_radiotap_header *tap = &sc->sc_txtap;
tap->wt_flags = 0;
tap->wt_rate = rate;
if (k != NULL)
tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
bpf_mtap2(ifp->if_bpf, tap, sc->sc_txtap_len, m0);
}
flags = IWN_TX_AUTO_SEQ;
/* XXX honor ACM */
if (!ismcast)
flags |= IWN_TX_NEED_ACK;
if (ismcast || type != IEEE80211_FC0_TYPE_DATA)
id = IWN_ID_BROADCAST;
else
id = IWN_ID_BSS;
/* check if RTS/CTS or CTS-to-self protection must be used */
if (!ismcast) {
/* multicast frames are not sent at OFDM rates in 802.11b/g */
if (m0->m_pkthdr.len+IEEE80211_CRC_LEN > vap->iv_rtsthreshold) {
flags |= IWN_TX_NEED_RTS | IWN_TX_FULL_TXOP;
} else if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
IWN_RATE_IS_OFDM(rate)) {
if (ic->ic_protmode == IEEE80211_PROT_CTSONLY)
flags |= IWN_TX_NEED_CTS | IWN_TX_FULL_TXOP;
else if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
flags |= IWN_TX_NEED_RTS | IWN_TX_FULL_TXOP;
}
}
if (type == IEEE80211_FC0_TYPE_MGT) {
uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
/* tell h/w to set timestamp in probe responses */
if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
flags |= IWN_TX_INSERT_TSTAMP;
if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ ||
subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ)
timeout = htole16(3);
else
timeout = htole16(2);
} else
timeout = htole16(0);
if (hdrlen & 3) {
/* first segment's length must be a multiple of 4 */
flags |= IWN_TX_NEED_PADDING;
pad = 4 - (hdrlen & 3);
} else
pad = 0;
desc = &ring->desc[ring->cur];
data = &ring->data[ring->cur];
cmd = &ring->cmd[ring->cur];
cmd->code = IWN_CMD_TX_DATA;
cmd->flags = 0;
cmd->qid = ring->qid;
cmd->idx = ring->cur;
tx = (struct iwn_cmd_data *)cmd->data;
/* NB: no need to bzero tx, all fields are reinitialized here */
tx->id = id;
tx->flags = htole32(flags);
tx->len = htole16(m0->m_pkthdr.len);
tx->rate = iwn_plcp_signal(rate);
tx->rts_ntries = 60; /* XXX? */
tx->data_ntries = 15; /* XXX? */
tx->lifetime = htole32(IWN_LIFETIME_INFINITE);
tx->timeout = timeout;
if (k != NULL) {
/* XXX fill in */;
} else
tx->security = 0;
/* XXX alternate between Ant A and Ant B ? */
tx->rflags = IWN_RFLAG_ANT_B;
if (tx->id == IWN_ID_BROADCAST) {
tx->ridx = IWN_MAX_TX_RETRIES - 1;
if (!IWN_RATE_IS_OFDM(rate))
tx->rflags |= IWN_RFLAG_CCK;
} else {
tx->ridx = 0;
/* tell adapter to ignore rflags */
tx->flags |= htole32(IWN_TX_USE_NODE_RATE);
}
/* copy and trim IEEE802.11 header */
memcpy((uint8_t *)(tx + 1), wh, hdrlen);
m_adj(m0, hdrlen);
error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m0, segs,
&nsegs, BUS_DMA_NOWAIT);
if (error != 0) {
if (error == EFBIG) {
/* too many fragments, linearize */
mnew = m_collapse(m0, M_DONTWAIT, IWN_MAX_SCATTER);
if (mnew == NULL) {
IWN_UNLOCK(sc);
device_printf(sc->sc_dev,
"%s: could not defrag mbuf\n", __func__);
m_freem(m0);
return ENOBUFS;
}
m0 = mnew;
error = bus_dmamap_load_mbuf_sg(ring->data_dmat,
data->map, m0, segs, &nsegs, BUS_DMA_NOWAIT);
}
if (error != 0) {
IWN_UNLOCK(sc);
device_printf(sc->sc_dev,
"%s: bus_dmamap_load_mbuf_sg failed, error %d\n",
__func__, error);
m_freem(m0);
return error;
}
}
data->m = m0;
data->ni = ni;
DPRINTF(sc, IWN_DEBUG_XMIT, "%s: qid %d idx %d len %d nsegs %d\n",
__func__, ring->qid, ring->cur, m0->m_pkthdr.len, nsegs);
paddr = ring->cmd_dma.paddr + ring->cur * sizeof (struct iwn_tx_cmd);
tx->loaddr = htole32(paddr + 4 +
offsetof(struct iwn_cmd_data, ntries));
tx->hiaddr = 0; /* limit to 32-bit physical addresses */
/* first scatter/gather segment is used by the tx data command */
IWN_SET_DESC_NSEGS(desc, 1 + nsegs);
IWN_SET_DESC_SEG(desc, 0, paddr, 4 + sizeof (*tx) + hdrlen + pad);
for (i = 1; i <= nsegs; i++) {
IWN_SET_DESC_SEG(desc, i, segs[i - 1].ds_addr,
segs[i - 1].ds_len);
}
sc->shared->len[ring->qid][ring->cur] =
htole16(hdrlen + m0->m_pkthdr.len + 8);
if (ring->cur < IWN_TX_WINDOW)
sc->shared->len[ring->qid][ring->cur + IWN_TX_RING_COUNT] =
htole16(hdrlen + m0->m_pkthdr.len + 8);
ring->queued++;
/* kick Tx ring */
ring->cur = (ring->cur + 1) % IWN_TX_RING_COUNT;
IWN_WRITE(sc, IWN_TX_WIDX, ring->qid << 8 | ring->cur);
ifp->if_opackets++;
sc->sc_tx_timer = 5;
return 0;
}
void
iwn_start(struct ifnet *ifp)
{
struct iwn_softc *sc = ifp->if_softc;
IWN_LOCK(sc);
iwn_start_locked(ifp);
IWN_UNLOCK(sc);
}
void
iwn_start_locked(struct ifnet *ifp)
{
struct iwn_softc *sc = ifp->if_softc;
struct ieee80211_node *ni;
struct iwn_tx_ring *txq;
struct mbuf *m;
int pri;
IWN_LOCK_ASSERT(sc);
for (;;) {
IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
if (m == NULL)
break;
ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
pri = M_WME_GETAC(m);
txq = &sc->txq[pri];
if (txq->queued >= IWN_TX_RING_COUNT - 8) {
/* XXX not right */
/* ring is nearly full, stop flow */
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
}
if (iwn_tx_data(sc, m, ni, txq) != 0) {
ifp->if_oerrors++;
ieee80211_free_node(ni);
break;
}
}
}
static int
iwn_tx_handoff(struct iwn_softc *sc,
struct iwn_tx_ring *ring,
struct iwn_tx_cmd *cmd,
struct iwn_cmd_data *tx,
struct ieee80211_node *ni,
struct mbuf *m0, u_int hdrlen, int pad)
{
struct ifnet *ifp = sc->sc_ifp;
struct iwn_tx_desc *desc;
struct iwn_tx_data *data;
bus_addr_t paddr;
struct mbuf *mnew;
int error, nsegs, i;
bus_dma_segment_t segs[IWN_MAX_SCATTER];
/* copy and trim IEEE802.11 header */
memcpy((uint8_t *)(tx + 1), mtod(m0, uint8_t *), hdrlen);
m_adj(m0, hdrlen);
desc = &ring->desc[ring->cur];
data = &ring->data[ring->cur];
error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m0, segs,
&nsegs, BUS_DMA_NOWAIT);
if (error != 0) {
if (error == EFBIG) {
/* too many fragments, linearize */
mnew = m_collapse(m0, M_DONTWAIT, IWN_MAX_SCATTER);
if (mnew == NULL) {
IWN_UNLOCK(sc);
device_printf(sc->sc_dev,
"%s: could not defrag mbuf\n", __func__);
m_freem(m0);
return ENOBUFS;
}
m0 = mnew;
error = bus_dmamap_load_mbuf_sg(ring->data_dmat,
data->map, m0, segs, &nsegs, BUS_DMA_NOWAIT);
}
if (error != 0) {
IWN_UNLOCK(sc);
device_printf(sc->sc_dev,
"%s: bus_dmamap_load_mbuf_sg failed, error %d\n",
__func__, error);
m_freem(m0);
return error;
}
}
data->m = m0;
data->ni = ni;
DPRINTF(sc, IWN_DEBUG_XMIT, "%s: qid %d idx %d len %d nsegs %d\n",
__func__, ring->qid, ring->cur, m0->m_pkthdr.len, nsegs);
paddr = ring->cmd_dma.paddr + ring->cur * sizeof (struct iwn_tx_cmd);
tx->loaddr = htole32(paddr + 4 +
offsetof(struct iwn_cmd_data, ntries));
tx->hiaddr = 0; /* limit to 32-bit physical addresses */
/* first scatter/gather segment is used by the tx data command */
IWN_SET_DESC_NSEGS(desc, 1 + nsegs);
IWN_SET_DESC_SEG(desc, 0, paddr, 4 + sizeof (*tx) + hdrlen + pad);
for (i = 1; i <= nsegs; i++) {
IWN_SET_DESC_SEG(desc, i, segs[i - 1].ds_addr,
segs[i - 1].ds_len);
}
sc->shared->len[ring->qid][ring->cur] =
htole16(hdrlen + m0->m_pkthdr.len + 8);
if (ring->cur < IWN_TX_WINDOW)
sc->shared->len[ring->qid][ring->cur + IWN_TX_RING_COUNT] =
htole16(hdrlen + m0->m_pkthdr.len + 8);
ring->queued++;
/* kick Tx ring */
ring->cur = (ring->cur + 1) % IWN_TX_RING_COUNT;
IWN_WRITE(sc, IWN_TX_WIDX, ring->qid << 8 | ring->cur);
ifp->if_opackets++;
sc->sc_tx_timer = 5;
return 0;
}
static int
iwn_tx_data_raw(struct iwn_softc *sc, struct mbuf *m0,
struct ieee80211_node *ni, struct iwn_tx_ring *ring,
const struct ieee80211_bpf_params *params)
{
struct ifnet *ifp = sc->sc_ifp;
struct iwn_tx_cmd *cmd;
struct iwn_cmd_data *tx;
struct ieee80211_frame *wh;
uint32_t flags;
uint8_t type, subtype;
u_int hdrlen;
int rate, pad;
IWN_LOCK_ASSERT(sc);
wh = mtod(m0, struct ieee80211_frame *);
type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
hdrlen = ieee80211_anyhdrsize(wh);
flags = IWN_TX_AUTO_SEQ;
if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0)
flags |= IWN_TX_NEED_ACK;
if (params->ibp_flags & IEEE80211_BPF_RTS)
flags |= IWN_TX_NEED_RTS | IWN_TX_FULL_TXOP;
if (params->ibp_flags & IEEE80211_BPF_CTS)
flags |= IWN_TX_NEED_CTS | IWN_TX_FULL_TXOP;
if (type == IEEE80211_FC0_TYPE_MGT &&
subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
/* tell h/w to set timestamp in probe responses */
flags |= IWN_TX_INSERT_TSTAMP;
}
if (hdrlen & 3) {
/* first segment's length must be a multiple of 4 */
flags |= IWN_TX_NEED_PADDING;
pad = 4 - (hdrlen & 3);
} else
pad = 0;
/* pick a tx rate */
rate = params->ibp_rate0;
if (bpf_peers_present(ifp->if_bpf)) {
struct iwn_tx_radiotap_header *tap = &sc->sc_txtap;
tap->wt_flags = 0;
tap->wt_rate = rate;
bpf_mtap2(ifp->if_bpf, tap, sc->sc_txtap_len, m0);
}
cmd = &ring->cmd[ring->cur];
cmd->code = IWN_CMD_TX_DATA;
cmd->flags = 0;
cmd->qid = ring->qid;
cmd->idx = ring->cur;
tx = (struct iwn_cmd_data *)cmd->data;
/* NB: no need to bzero tx, all fields are reinitialized here */
tx->id = IWN_ID_BROADCAST;
tx->flags = htole32(flags);
tx->len = htole16(m0->m_pkthdr.len);
tx->rate = iwn_plcp_signal(rate);
tx->rts_ntries = params->ibp_try1; /* XXX? */
tx->data_ntries = params->ibp_try0;
tx->lifetime = htole32(IWN_LIFETIME_INFINITE);
/* XXX use try count? */
if (type == IEEE80211_FC0_TYPE_MGT) {
if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ ||
subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ)
tx->timeout = htole16(3);
else
tx->timeout = htole16(2);
} else
tx->timeout = htole16(0);
tx->security = 0;
/* XXX alternate between Ant A and Ant B ? */
tx->rflags = IWN_RFLAG_ANT_B; /* XXX params->ibp_pri >> 2 */
tx->ridx = IWN_MAX_TX_RETRIES - 1;
if (!IWN_RATE_IS_OFDM(rate))
tx->rflags |= IWN_RFLAG_CCK;
return iwn_tx_handoff(sc, ring, cmd, tx, ni, m0, hdrlen, pad);
}
static int
iwn_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
const struct ieee80211_bpf_params *params)
{
struct ieee80211com *ic = ni->ni_ic;
struct ifnet *ifp = ic->ic_ifp;
struct iwn_softc *sc = ifp->if_softc;
struct iwn_tx_ring *txq;
int error;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
ieee80211_free_node(ni);
m_freem(m);
return ENETDOWN;
}
IWN_LOCK(sc);
if (params == NULL)
txq = &sc->txq[M_WME_GETAC(m)];
else
txq = &sc->txq[params->ibp_pri & 3];
if (txq->queued >= IWN_TX_RING_COUNT - 8) {
/* XXX not right */
/* ring is nearly full, stop flow */
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
}
if (params == NULL) {
/*
* Legacy path; interpret frame contents to decide
* precisely how to send the frame.
*/
error = iwn_tx_data(sc, m, ni, txq);
} else {
/*
* Caller supplied explicit parameters to use in
* sending the frame.
*/
error = iwn_tx_data_raw(sc, m, ni, txq, params);
}
if (error != 0) {
/* NB: m is reclaimed on tx failure */
ieee80211_free_node(ni);
ifp->if_oerrors++;
}
IWN_UNLOCK(sc);
return error;
}
static void
iwn_watchdog(struct iwn_softc *sc)
{
if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) {
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
if_printf(ifp, "device timeout\n");
ieee80211_runtask(ic, &sc->sc_reinit_task);
}
}
int
iwn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct iwn_softc *sc = ifp->if_softc;
struct ieee80211com *ic = ifp->if_l2com;
struct ifreq *ifr = (struct ifreq *) data;
int error = 0, startall = 0;
switch (cmd) {
case SIOCSIFFLAGS:
IWN_LOCK(sc);
if (ifp->if_flags & IFF_UP) {
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
iwn_init_locked(sc);
startall = 1;
}
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
iwn_stop_locked(sc);
}
IWN_UNLOCK(sc);
if (startall)
ieee80211_start_all(ic);
break;
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
break;
case SIOCGIFADDR:
error = ether_ioctl(ifp, cmd, data);
break;
default:
error = EINVAL;
break;
}
return error;
}
void
iwn_read_eeprom(struct iwn_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN])
{
char domain[4];
uint16_t val;
int i, error;
if ((error = iwn_eeprom_lock(sc)) != 0) {
device_printf(sc->sc_dev,
"%s: could not lock EEPROM, error %d\n", __func__, error);
return;
}
/* read and print regulatory domain */
iwn_read_prom_data(sc, IWN_EEPROM_DOMAIN, domain, 4);
device_printf(sc->sc_dev,"Reg Domain: %.4s", domain);
/* read and print MAC address */
iwn_read_prom_data(sc, IWN_EEPROM_MAC, macaddr, 6);
printf(", address %6D\n", macaddr, ":");
/* read the list of authorized channels */
iwn_read_eeprom_channels(sc);
/* read maximum allowed Tx power for 2GHz and 5GHz bands */
iwn_read_prom_data(sc, IWN_EEPROM_MAXPOW, &val, 2);
sc->maxpwr2GHz = val & 0xff;
sc->maxpwr5GHz = val >> 8;
/* check that EEPROM values are correct */
if (sc->maxpwr5GHz < 20 || sc->maxpwr5GHz > 50)
sc->maxpwr5GHz = 38;
if (sc->maxpwr2GHz < 20 || sc->maxpwr2GHz > 50)
sc->maxpwr2GHz = 38;
DPRINTF(sc, IWN_DEBUG_RESET, "maxpwr 2GHz=%d 5GHz=%d\n",
sc->maxpwr2GHz, sc->maxpwr5GHz);
/* read voltage at which samples were taken */
iwn_read_prom_data(sc, IWN_EEPROM_VOLTAGE, &val, 2);
sc->eeprom_voltage = (int16_t)le16toh(val);
DPRINTF(sc, IWN_DEBUG_RESET, "voltage=%d (in 0.3V)\n",
sc->eeprom_voltage);
/* read power groups */
iwn_read_prom_data(sc, IWN_EEPROM_BANDS, sc->bands, sizeof sc->bands);
#ifdef IWN_DEBUG
if (sc->sc_debug & IWN_DEBUG_ANY) {
for (i = 0; i < IWN_NBANDS; i++)
iwn_print_power_group(sc, i);
}
#endif
iwn_eeprom_unlock(sc);
}
struct iwn_chan_band {
uint32_t addr; /* offset in EEPROM */
uint32_t flags; /* net80211 flags */
uint8_t nchan;
#define IWN_MAX_CHAN_PER_BAND 14
uint8_t chan[IWN_MAX_CHAN_PER_BAND];
};
static void
iwn_read_eeprom_band(struct iwn_softc *sc, const struct iwn_chan_band *band)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct iwn_eeprom_chan channels[IWN_MAX_CHAN_PER_BAND];
struct ieee80211_channel *c;
int i, chan, flags;
iwn_read_prom_data(sc, band->addr, channels,
band->nchan * sizeof (struct iwn_eeprom_chan));
for (i = 0; i < band->nchan; i++) {
if (!(channels[i].flags & IWN_EEPROM_CHAN_VALID)) {
DPRINTF(sc, IWN_DEBUG_RESET,
"skip chan %d flags 0x%x maxpwr %d\n",
band->chan[i], channels[i].flags,
channels[i].maxpwr);
continue;
}
chan = band->chan[i];
/* translate EEPROM flags to net80211 */
flags = 0;
if ((channels[i].flags & IWN_EEPROM_CHAN_ACTIVE) == 0)
flags |= IEEE80211_CHAN_PASSIVE;
if ((channels[i].flags & IWN_EEPROM_CHAN_IBSS) == 0)
flags |= IEEE80211_CHAN_NOADHOC;
if (channels[i].flags & IWN_EEPROM_CHAN_RADAR) {
flags |= IEEE80211_CHAN_DFS;
/* XXX apparently IBSS may still be marked */
flags |= IEEE80211_CHAN_NOADHOC;
}
DPRINTF(sc, IWN_DEBUG_RESET,
"add chan %d flags 0x%x maxpwr %d\n",
chan, channels[i].flags, channels[i].maxpwr);
c = &ic->ic_channels[ic->ic_nchans++];
c->ic_ieee = chan;
c->ic_freq = ieee80211_ieee2mhz(chan, band->flags);
c->ic_maxregpower = channels[i].maxpwr;
c->ic_maxpower = 2*c->ic_maxregpower;
if (band->flags & IEEE80211_CHAN_2GHZ) {
/* G =>'s B is supported */
c->ic_flags = IEEE80211_CHAN_B | flags;
c = &ic->ic_channels[ic->ic_nchans++];
c[0] = c[-1];
c->ic_flags = IEEE80211_CHAN_G | flags;
} else { /* 5GHz band */
c->ic_flags = IEEE80211_CHAN_A | flags;
}
/* XXX no constraints on using HT20 */
/* add HT20, HT40 added separately */
c = &ic->ic_channels[ic->ic_nchans++];
c[0] = c[-1];
c->ic_flags |= IEEE80211_CHAN_HT20;
/* XXX NARROW =>'s 1/2 and 1/4 width? */
}
}
static void
iwn_read_eeprom_ht40(struct iwn_softc *sc, const struct iwn_chan_band *band)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct iwn_eeprom_chan channels[IWN_MAX_CHAN_PER_BAND];
struct ieee80211_channel *c, *cent, *extc;
int i;
iwn_read_prom_data(sc, band->addr, channels,
band->nchan * sizeof (struct iwn_eeprom_chan));
for (i = 0; i < band->nchan; i++) {
if (!(channels[i].flags & IWN_EEPROM_CHAN_VALID) ||
!(channels[i].flags & IWN_EEPROM_CHAN_WIDE)) {
DPRINTF(sc, IWN_DEBUG_RESET,
"skip chan %d flags 0x%x maxpwr %d\n",
band->chan[i], channels[i].flags,
channels[i].maxpwr);
continue;
}
/*
* Each entry defines an HT40 channel pair; find the
* center channel, then the extension channel above.
*/
cent = ieee80211_find_channel_byieee(ic, band->chan[i],
band->flags & ~IEEE80211_CHAN_HT);
if (cent == NULL) { /* XXX shouldn't happen */
device_printf(sc->sc_dev,
"%s: no entry for channel %d\n",
__func__, band->chan[i]);
continue;
}
extc = ieee80211_find_channel(ic, cent->ic_freq+20,
band->flags & ~IEEE80211_CHAN_HT);
if (extc == NULL) {
DPRINTF(sc, IWN_DEBUG_RESET,
"skip chan %d, extension channel not found\n",
band->chan[i]);
continue;
}
DPRINTF(sc, IWN_DEBUG_RESET,
"add ht40 chan %d flags 0x%x maxpwr %d\n",
band->chan[i], channels[i].flags, channels[i].maxpwr);
c = &ic->ic_channels[ic->ic_nchans++];
c[0] = cent[0];
c->ic_extieee = extc->ic_ieee;
c->ic_flags &= ~IEEE80211_CHAN_HT;
c->ic_flags |= IEEE80211_CHAN_HT40U;
c = &ic->ic_channels[ic->ic_nchans++];
c[0] = extc[0];
c->ic_extieee = cent->ic_ieee;
c->ic_flags &= ~IEEE80211_CHAN_HT;
c->ic_flags |= IEEE80211_CHAN_HT40D;
}
}
static void
iwn_read_eeprom_channels(struct iwn_softc *sc)
{
#define N(a) (sizeof(a)/sizeof(a[0]))
static const struct iwn_chan_band iwn_bands[] = {
{ IWN_EEPROM_BAND1, IEEE80211_CHAN_G, 14,
{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 } },
{ IWN_EEPROM_BAND2, IEEE80211_CHAN_A, 13,
{ 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16 } },
{ IWN_EEPROM_BAND3, IEEE80211_CHAN_A, 12,
{ 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 } },
{ IWN_EEPROM_BAND4, IEEE80211_CHAN_A, 11,
{ 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 } },
{ IWN_EEPROM_BAND5, IEEE80211_CHAN_A, 6,
{ 145, 149, 153, 157, 161, 165 } },
{ IWN_EEPROM_BAND6, IEEE80211_CHAN_G | IEEE80211_CHAN_HT40, 7,
{ 1, 2, 3, 4, 5, 6, 7 } },
{ IWN_EEPROM_BAND7, IEEE80211_CHAN_A | IEEE80211_CHAN_HT40, 11,
{ 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157 } }
};
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
int i;
/* read the list of authorized channels */
for (i = 0; i < N(iwn_bands)-2; i++)
iwn_read_eeprom_band(sc, &iwn_bands[i]);
for (; i < N(iwn_bands); i++)
iwn_read_eeprom_ht40(sc, &iwn_bands[i]);
ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
#undef N
}
#ifdef IWN_DEBUG
void
iwn_print_power_group(struct iwn_softc *sc, int i)
{
struct iwn_eeprom_band *band = &sc->bands[i];
struct iwn_eeprom_chan_samples *chans = band->chans;
int j, c;
printf("===band %d===\n", i);
printf("chan lo=%d, chan hi=%d\n", band->lo, band->hi);
printf("chan1 num=%d\n", chans[0].num);
for (c = 0; c < IWN_NTXCHAINS; c++) {
for (j = 0; j < IWN_NSAMPLES; j++) {
printf("chain %d, sample %d: temp=%d gain=%d "
"power=%d pa_det=%d\n", c, j,
chans[0].samples[c][j].temp,
chans[0].samples[c][j].gain,
chans[0].samples[c][j].power,
chans[0].samples[c][j].pa_det);
}
}
printf("chan2 num=%d\n", chans[1].num);
for (c = 0; c < IWN_NTXCHAINS; c++) {
for (j = 0; j < IWN_NSAMPLES; j++) {
printf("chain %d, sample %d: temp=%d gain=%d "
"power=%d pa_det=%d\n", c, j,
chans[1].samples[c][j].temp,
chans[1].samples[c][j].gain,
chans[1].samples[c][j].power,
chans[1].samples[c][j].pa_det);
}
}
}
#endif
/*
* Send a command to the firmware.
*/
int
iwn_cmd(struct iwn_softc *sc, int code, const void *buf, int size, int async)
{
struct iwn_tx_ring *ring = &sc->txq[4];
struct iwn_tx_desc *desc;
struct iwn_tx_cmd *cmd;
bus_addr_t paddr;
IWN_LOCK_ASSERT(sc);
KASSERT(size <= sizeof cmd->data, ("Command too big"));
desc = &ring->desc[ring->cur];
cmd = &ring->cmd[ring->cur];
cmd->code = code;
cmd->flags = 0;
cmd->qid = ring->qid;
cmd->idx = ring->cur;
memcpy(cmd->data, buf, size);
paddr = ring->cmd_dma.paddr + ring->cur * sizeof (struct iwn_tx_cmd);
IWN_SET_DESC_NSEGS(desc, 1);
IWN_SET_DESC_SEG(desc, 0, paddr, 4 + size);
sc->shared->len[ring->qid][ring->cur] = htole16(8);
if (ring->cur < IWN_TX_WINDOW) {
sc->shared->len[ring->qid][ring->cur + IWN_TX_RING_COUNT] =
htole16(8);
}
DPRINTF(sc, IWN_DEBUG_CMD, "%s: %s (0x%x) flags %d qid %d idx %d\n",
__func__, iwn_intr_str(cmd->code), cmd->code,
cmd->flags, cmd->qid, cmd->idx);
/* kick cmd ring */
ring->cur = (ring->cur + 1) % IWN_TX_RING_COUNT;
IWN_WRITE(sc, IWN_TX_WIDX, ring->qid << 8 | ring->cur);
return async ? 0 : msleep(cmd, &sc->sc_mtx, PCATCH, "iwncmd", hz);
}
static const uint8_t iwn_ridx_to_plcp[] = {
10, 20, 55, 110, /* CCK */
0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3, 0x3 /* OFDM R1-R4 */
};
static const uint8_t iwn_siso_mcs_to_plcp[] = {
0, 0, 0, 0, /* CCK */
0, 0, 1, 2, 3, 4, 5, 6, 7 /* HT */
};
static const uint8_t iwn_mimo_mcs_to_plcp[] = {
0, 0, 0, 0, /* CCK */
8, 8, 9, 10, 11, 12, 13, 14, 15 /* HT */
};
static const uint8_t iwn_prev_ridx[] = {
/* NB: allow fallback from CCK11 to OFDM9 and from OFDM6 to CCK5 */
0, 0, 1, 5, /* CCK */
2, 4, 3, 6, 7, 8, 9, 10, 10 /* OFDM */
};
/*
* Configure hardware link parameters for the specified
* node operating on the specified channel.
*/
int
iwn_set_link_quality(struct iwn_softc *sc, uint8_t id,
const struct ieee80211_channel *c, int async)
{
struct iwn_cmd_link_quality lq;
int i, ridx;
memset(&lq, 0, sizeof(lq));
lq.id = id;
if (IEEE80211_IS_CHAN_HT(c)) {
lq.mimo = 1;
lq.ssmask = 0x1;
} else
lq.ssmask = 0x2;
if (id == IWN_ID_BSS)
ridx = IWN_RATE_OFDM54;
else if (IEEE80211_IS_CHAN_A(c))
ridx = IWN_RATE_OFDM6;
else
ridx = IWN_RATE_CCK1;
for (i = 0; i < IWN_MAX_TX_RETRIES; i++) {
/* XXX toggle antenna for retry patterns */
if (IEEE80211_IS_CHAN_HT40(c)) {
lq.table[i].rate = iwn_mimo_mcs_to_plcp[ridx]
| IWN_RATE_MCS;
lq.table[i].rflags = IWN_RFLAG_HT
| IWN_RFLAG_HT40
| IWN_RFLAG_ANT_A;
/* XXX shortGI */
} else if (IEEE80211_IS_CHAN_HT(c)) {
lq.table[i].rate = iwn_siso_mcs_to_plcp[ridx]
| IWN_RATE_MCS;
lq.table[i].rflags = IWN_RFLAG_HT
| IWN_RFLAG_ANT_A;
/* XXX shortGI */
} else {
lq.table[i].rate = iwn_ridx_to_plcp[ridx];
if (ridx <= IWN_RATE_CCK11)
lq.table[i].rflags = IWN_RFLAG_CCK;
lq.table[i].rflags |= IWN_RFLAG_ANT_B;
}
ridx = iwn_prev_ridx[ridx];
}
lq.dsmask = 0x3;
lq.ampdu_disable = 3;
lq.ampdu_limit = htole16(4000);
#ifdef IWN_DEBUG
if (sc->sc_debug & IWN_DEBUG_STATE) {
printf("%s: set link quality for node %d, mimo %d ssmask %d\n",
__func__, id, lq.mimo, lq.ssmask);
printf("%s:", __func__);
for (i = 0; i < IWN_MAX_TX_RETRIES; i++)
printf(" %d:%x", lq.table[i].rate, lq.table[i].rflags);
printf("\n");
}
#endif
return iwn_cmd(sc, IWN_CMD_TX_LINK_QUALITY, &lq, sizeof(lq), async);
}
#if 0
/*
* Install a pairwise key into the hardware.
*/
int
iwn_set_key(struct ieee80211com *ic, struct ieee80211_node *ni,
const struct ieee80211_key *k)
{
struct iwn_softc *sc = ic->ic_softc;
struct iwn_node_info node;
if (k->k_flags & IEEE80211_KEY_GROUP)
return 0;
memset(&node, 0, sizeof node);
switch (k->k_cipher) {
case IEEE80211_CIPHER_CCMP:
node.security = htole16(IWN_CIPHER_CCMP);
memcpy(node.key, k->k_key, k->k_len);
break;
default:
return 0;
}
node.id = IWN_ID_BSS;
IEEE80211_ADDR_COPY(node.macaddr, ni->ni_macaddr);
node.control = IWN_NODE_UPDATE;
node.flags = IWN_FLAG_SET_KEY;
return iwn_cmd(sc, IWN_CMD_ADD_NODE, &node, sizeof node, 1);
}
#endif
int
iwn_wme_update(struct ieee80211com *ic)
{
#define IWN_EXP2(x) ((1 << (x)) - 1) /* CWmin = 2^ECWmin - 1 */
#define IWN_TXOP_TO_US(v) (v<<5)
struct iwn_softc *sc = ic->ic_ifp->if_softc;
struct iwn_edca_params cmd;
int i;
memset(&cmd, 0, sizeof cmd);
cmd.flags = htole32(IWN_EDCA_UPDATE);
for (i = 0; i < WME_NUM_AC; i++) {
const struct wmeParams *wmep =
&ic->ic_wme.wme_chanParams.cap_wmeParams[i];
cmd.ac[i].aifsn = wmep->wmep_aifsn;
cmd.ac[i].cwmin = htole16(IWN_EXP2(wmep->wmep_logcwmin));
cmd.ac[i].cwmax = htole16(IWN_EXP2(wmep->wmep_logcwmax));
cmd.ac[i].txoplimit =
htole16(IWN_TXOP_TO_US(wmep->wmep_txopLimit));
}
IWN_LOCK(sc);
(void) iwn_cmd(sc, IWN_CMD_EDCA_PARAMS, &cmd, sizeof cmd, 1 /*async*/);
IWN_UNLOCK(sc);
return 0;
#undef IWN_TXOP_TO_US
#undef IWN_EXP2
}
void
iwn_set_led(struct iwn_softc *sc, uint8_t which, uint8_t off, uint8_t on)
{
struct iwn_cmd_led led;
led.which = which;
led.unit = htole32(100000); /* on/off in unit of 100ms */
led.off = off;
led.on = on;
(void) iwn_cmd(sc, IWN_CMD_SET_LED, &led, sizeof led, 1);
}
/*
* Set the critical temperature at which the firmware will automatically stop
* the radio transmitter.
*/
int
iwn_set_critical_temp(struct iwn_softc *sc)
{
struct iwn_ucode_info *uc = &sc->ucode_info;
struct iwn_critical_temp crit;
uint32_t r1, r2, r3, temp;
r1 = le32toh(uc->temp[0].chan20MHz);
r2 = le32toh(uc->temp[1].chan20MHz);
r3 = le32toh(uc->temp[2].chan20MHz);
/* inverse function of iwn_get_temperature() */
temp = r2 + (IWN_CTOK(110) * (r3 - r1)) / 259;
IWN_WRITE(sc, IWN_UCODE_CLR, IWN_CTEMP_STOP_RF);
memset(&crit, 0, sizeof crit);
crit.tempR = htole32(temp);
DPRINTF(sc, IWN_DEBUG_RESET, "setting critical temp to %u\n", temp);
return iwn_cmd(sc, IWN_CMD_SET_CRITICAL_TEMP, &crit, sizeof crit, 0);
}
void
iwn_enable_tsf(struct iwn_softc *sc, struct ieee80211_node *ni)
{
struct iwn_cmd_tsf tsf;
uint64_t val, mod;
memset(&tsf, 0, sizeof tsf);
memcpy(&tsf.tstamp, ni->ni_tstamp.data, sizeof (uint64_t));
tsf.bintval = htole16(ni->ni_intval);
tsf.lintval = htole16(10);
/* XXX all wrong */
/* compute remaining time until next beacon */
val = (uint64_t)ni->ni_intval * 1024; /* msecs -> usecs */
DPRINTF(sc, IWN_DEBUG_ANY, "%s: val = %ju %s\n", __func__,
val, val == 0 ? "correcting" : "");
if (val == 0)
val = 1;
mod = le64toh(tsf.tstamp) % val;
tsf.binitval = htole32((uint32_t)(val - mod));
DPRINTF(sc, IWN_DEBUG_RESET, "TSF bintval=%u tstamp=%ju, init=%u\n",
ni->ni_intval, le64toh(tsf.tstamp), (uint32_t)(val - mod));
if (iwn_cmd(sc, IWN_CMD_TSF, &tsf, sizeof tsf, 1) != 0)
device_printf(sc->sc_dev,
"%s: could not enable TSF\n", __func__);
}
void
iwn_power_calibration(struct iwn_softc *sc, int temp)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
#if 0
KASSERT(ic->ic_state == IEEE80211_S_RUN, ("not running"));
#endif
DPRINTF(sc, IWN_DEBUG_CALIBRATE, "%s: temperature %d->%d\n",
__func__, sc->temp, temp);
/* adjust Tx power if need be (delta >= 3<>C) */
if (abs(temp - sc->temp) < 3)
return;
sc->temp = temp;
DPRINTF(sc, IWN_DEBUG_CALIBRATE, "%s: set Tx power for channel %d\n",
__func__, ieee80211_chan2ieee(ic, ic->ic_bsschan));
if (iwn_set_txpower(sc, ic->ic_bsschan, 1) != 0) {
/* just warn, too bad for the automatic calibration... */
device_printf(sc->sc_dev,
"%s: could not adjust Tx power\n", __func__);
}
}
/*
* Set Tx power for a given channel (each rate has its own power settings).
* This function takes into account the regulatory information from EEPROM,
* the current temperature and the current voltage.
*/
int
iwn_set_txpower(struct iwn_softc *sc, struct ieee80211_channel *ch, int async)
{
/* fixed-point arithmetic division using a n-bit fractional part */
#define fdivround(a, b, n) \
((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n))
/* linear interpolation */
#define interpolate(x, x1, y1, x2, y2, n) \
((y1) + fdivround(((int)(x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n))
static const int tdiv[IWN_NATTEN_GROUPS] = { 9, 8, 8, 8, 6 };
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct iwn_ucode_info *uc = &sc->ucode_info;
struct iwn_cmd_txpower cmd;
struct iwn_eeprom_chan_samples *chans;
const uint8_t *rf_gain, *dsp_gain;
int32_t vdiff, tdiff;
int i, c, grp, maxpwr;
u_int chan;
/* get channel number */
chan = ieee80211_chan2ieee(ic, ch);
memset(&cmd, 0, sizeof cmd);
cmd.band = IEEE80211_IS_CHAN_5GHZ(ch) ? 0 : 1;
cmd.chan = chan;
if (IEEE80211_IS_CHAN_5GHZ(ch)) {
maxpwr = sc->maxpwr5GHz;
rf_gain = iwn_rf_gain_5ghz;
dsp_gain = iwn_dsp_gain_5ghz;
} else {
maxpwr = sc->maxpwr2GHz;
rf_gain = iwn_rf_gain_2ghz;
dsp_gain = iwn_dsp_gain_2ghz;
}
/* compute voltage compensation */
vdiff = ((int32_t)le32toh(uc->volt) - sc->eeprom_voltage) / 7;
if (vdiff > 0)
vdiff *= 2;
if (abs(vdiff) > 2)
vdiff = 0;
DPRINTF(sc, IWN_DEBUG_CALIBRATE | IWN_DEBUG_TXPOW,
"%s: voltage compensation=%d (UCODE=%d, EEPROM=%d)\n",
__func__, vdiff, le32toh(uc->volt), sc->eeprom_voltage);
/* get channel's attenuation group */
if (chan <= 20) /* 1-20 */
grp = 4;
else if (chan <= 43) /* 34-43 */
grp = 0;
else if (chan <= 70) /* 44-70 */
grp = 1;
else if (chan <= 124) /* 71-124 */
grp = 2;
else /* 125-200 */
grp = 3;
DPRINTF(sc, IWN_DEBUG_CALIBRATE | IWN_DEBUG_TXPOW,
"%s: chan %d, attenuation group=%d\n", __func__, chan, grp);
/* get channel's sub-band */
for (i = 0; i < IWN_NBANDS; i++)
if (sc->bands[i].lo != 0 &&
sc->bands[i].lo <= chan && chan <= sc->bands[i].hi)
break;
chans = sc->bands[i].chans;
DPRINTF(sc, IWN_DEBUG_CALIBRATE | IWN_DEBUG_TXPOW,
"%s: chan %d sub-band=%d\n", __func__, chan, i);
for (c = 0; c < IWN_NTXCHAINS; c++) {
uint8_t power, gain, temp;
int maxchpwr, pwr, ridx, idx;
power = interpolate(chan,
chans[0].num, chans[0].samples[c][1].power,
chans[1].num, chans[1].samples[c][1].power, 1);
gain = interpolate(chan,
chans[0].num, chans[0].samples[c][1].gain,
chans[1].num, chans[1].samples[c][1].gain, 1);
temp = interpolate(chan,
chans[0].num, chans[0].samples[c][1].temp,
chans[1].num, chans[1].samples[c][1].temp, 1);
DPRINTF(sc, IWN_DEBUG_CALIBRATE | IWN_DEBUG_TXPOW,
"%s: Tx chain %d: power=%d gain=%d temp=%d\n",
__func__, c, power, gain, temp);
/* compute temperature compensation */
tdiff = ((sc->temp - temp) * 2) / tdiv[grp];
DPRINTF(sc, IWN_DEBUG_CALIBRATE | IWN_DEBUG_TXPOW,
"%s: temperature compensation=%d (current=%d, EEPROM=%d)\n",
__func__, tdiff, sc->temp, temp);
for (ridx = 0; ridx <= IWN_RIDX_MAX; ridx++) {
maxchpwr = ch->ic_maxpower;
if ((ridx / 8) & 1) {
/* MIMO: decrease Tx power (-3dB) */
maxchpwr -= 6;
}
pwr = maxpwr - 10;
/* decrease power for highest OFDM rates */
if ((ridx % 8) == 5) /* 48Mbit/s */
pwr -= 5;
else if ((ridx % 8) == 6) /* 54Mbit/s */
pwr -= 7;
else if ((ridx % 8) == 7) /* 60Mbit/s */
pwr -= 10;
if (pwr > maxchpwr)
pwr = maxchpwr;
idx = gain - (pwr - power) - tdiff - vdiff;
if ((ridx / 8) & 1) /* MIMO */
idx += (int32_t)le32toh(uc->atten[grp][c]);
if (cmd.band == 0)
idx += 9; /* 5GHz */
if (ridx == IWN_RIDX_MAX)
idx += 5; /* CCK */
/* make sure idx stays in a valid range */
if (idx < 0)
idx = 0;
else if (idx > IWN_MAX_PWR_INDEX)
idx = IWN_MAX_PWR_INDEX;
DPRINTF(sc, IWN_DEBUG_CALIBRATE | IWN_DEBUG_TXPOW,
"%s: Tx chain %d, rate idx %d: power=%d\n",
__func__, c, ridx, idx);
cmd.power[ridx].rf_gain[c] = rf_gain[idx];
cmd.power[ridx].dsp_gain[c] = dsp_gain[idx];
}
}
DPRINTF(sc, IWN_DEBUG_CALIBRATE | IWN_DEBUG_TXPOW,
"%s: set tx power for chan %d\n", __func__, chan);
return iwn_cmd(sc, IWN_CMD_TXPOWER, &cmd, sizeof cmd, async);
#undef interpolate
#undef fdivround
}
/*
* Get the best (maximum) RSSI among the
* connected antennas and convert to dBm.
*/
int8_t
iwn_get_rssi(struct iwn_softc *sc, const struct iwn_rx_stat *stat)
{
int mask, agc, rssi;
mask = (le16toh(stat->antenna) >> 4) & 0x7;
agc = (le16toh(stat->agc) >> 7) & 0x7f;
rssi = 0;
#if 0
if (mask & (1 << 0)) /* Ant A */
rssi = max(rssi, stat->rssi[0]);
if (mask & (1 << 1)) /* Ant B */
rssi = max(rssi, stat->rssi[2]);
if (mask & (1 << 2)) /* Ant C */
rssi = max(rssi, stat->rssi[4]);
#else
rssi = max(rssi, stat->rssi[0]);
rssi = max(rssi, stat->rssi[2]);
rssi = max(rssi, stat->rssi[4]);
#endif
DPRINTF(sc, IWN_DEBUG_RECV, "%s: agc %d mask 0x%x rssi %d %d %d "
"result %d\n", __func__, agc, mask,
stat->rssi[0], stat->rssi[2], stat->rssi[4],
rssi - agc - IWN_RSSI_TO_DBM);
return rssi - agc - IWN_RSSI_TO_DBM;
}
/*
* Get the average noise among Rx antennas (in dBm).
*/
int
iwn_get_noise(const struct iwn_rx_general_stats *stats)
{
int i, total, nbant, noise;
total = nbant = 0;
for (i = 0; i < 3; i++) {
noise = le32toh(stats->noise[i]) & 0xff;
if (noise != 0) {
total += noise;
nbant++;
}
}
/* there should be at least one antenna but check anyway */
return (nbant == 0) ? -127 : (total / nbant) - 107;
}
/*
* Read temperature (in degC) from the on-board thermal sensor.
*/
int
iwn_get_temperature(struct iwn_softc *sc)
{
struct iwn_ucode_info *uc = &sc->ucode_info;
int32_t r1, r2, r3, r4, temp;
r1 = le32toh(uc->temp[0].chan20MHz);
r2 = le32toh(uc->temp[1].chan20MHz);
r3 = le32toh(uc->temp[2].chan20MHz);
r4 = le32toh(sc->rawtemp);
if (r1 == r3) /* prevents division by 0 (should not happen) */
return 0;
/* sign-extend 23-bit R4 value to 32-bit */
r4 = (r4 << 8) >> 8;
/* compute temperature */
temp = (259 * (r4 - r2)) / (r3 - r1);
temp = (temp * 97) / 100 + 8;
return IWN_KTOC(temp);
}
/*
* Initialize sensitivity calibration state machine.
*/
int
iwn_init_sensitivity(struct iwn_softc *sc)
{
struct iwn_calib_state *calib = &sc->calib;
struct iwn_phy_calib_cmd cmd;
int error;
/* reset calibration state */
memset(calib, 0, sizeof (*calib));
calib->state = IWN_CALIB_STATE_INIT;
calib->cck_state = IWN_CCK_STATE_HIFA;
/* initial values taken from the reference driver */
calib->corr_ofdm_x1 = 105;
calib->corr_ofdm_mrc_x1 = 220;
calib->corr_ofdm_x4 = 90;
calib->corr_ofdm_mrc_x4 = 170;
calib->corr_cck_x4 = 125;
calib->corr_cck_mrc_x4 = 200;
calib->energy_cck = 100;
/* write initial sensitivity values */
error = iwn_send_sensitivity(sc);
if (error != 0)
return error;
memset(&cmd, 0, sizeof cmd);
cmd.code = IWN_SET_DIFF_GAIN;
/* differential gains initially set to 0 for all 3 antennas */
DPRINTF(sc, IWN_DEBUG_CALIBRATE, "%s: calibrate phy\n", __func__);
return iwn_cmd(sc, IWN_PHY_CALIB, &cmd, sizeof cmd, 1);
}
/*
* Collect noise and RSSI statistics for the first 20 beacons received
* after association and use them to determine connected antennas and
* set differential gains.
*/
void
iwn_compute_differential_gain(struct iwn_softc *sc,
const struct iwn_rx_general_stats *stats)
{
struct iwn_calib_state *calib = &sc->calib;
struct iwn_phy_calib_cmd cmd;
int i, val;
/* accumulate RSSI and noise for all 3 antennas */
for (i = 0; i < 3; i++) {
calib->rssi[i] += le32toh(stats->rssi[i]) & 0xff;
calib->noise[i] += le32toh(stats->noise[i]) & 0xff;
}
/* we update differential gain only once after 20 beacons */
if (++calib->nbeacons < 20)
return;
/* determine antenna with highest average RSSI */
val = max(calib->rssi[0], calib->rssi[1]);
val = max(calib->rssi[2], val);
/* determine which antennas are connected */
sc->antmsk = 0;
for (i = 0; i < 3; i++)
if (val - calib->rssi[i] <= 15 * 20)
sc->antmsk |= 1 << i;
/* if neither Ant A and Ant B are connected.. */
if ((sc->antmsk & (1 << 0 | 1 << 1)) == 0)
sc->antmsk |= 1 << 1; /* ..mark Ant B as connected! */
/* get minimal noise among connected antennas */
val = INT_MAX; /* ok, there's at least one */
for (i = 0; i < 3; i++)
if (sc->antmsk & (1 << i))
val = min(calib->noise[i], val);
memset(&cmd, 0, sizeof cmd);
cmd.code = IWN_SET_DIFF_GAIN;
/* set differential gains for connected antennas */
for (i = 0; i < 3; i++) {
if (sc->antmsk & (1 << i)) {
cmd.gain[i] = (calib->noise[i] - val) / 30;
/* limit differential gain to 3 */
cmd.gain[i] = min(cmd.gain[i], 3);
cmd.gain[i] |= IWN_GAIN_SET;
}
}
DPRINTF(sc, IWN_DEBUG_CALIBRATE,
"%s: set differential gains Ant A/B/C: %x/%x/%x (%x)\n",
__func__,cmd.gain[0], cmd.gain[1], cmd.gain[2], sc->antmsk);
if (iwn_cmd(sc, IWN_PHY_CALIB, &cmd, sizeof cmd, 1) == 0)
calib->state = IWN_CALIB_STATE_RUN;
}
/*
* Tune RF Rx sensitivity based on the number of false alarms detected
* during the last beacon period.
*/
void
iwn_tune_sensitivity(struct iwn_softc *sc, const struct iwn_rx_stats *stats)
{
#define inc_clip(val, inc, max) \
if ((val) < (max)) { \
if ((val) < (max) - (inc)) \
(val) += (inc); \
else \
(val) = (max); \
needs_update = 1; \
}
#define dec_clip(val, dec, min) \
if ((val) > (min)) { \
if ((val) > (min) + (dec)) \
(val) -= (dec); \
else \
(val) = (min); \
needs_update = 1; \
}
struct iwn_calib_state *calib = &sc->calib;
uint32_t val, rxena, fa;
uint32_t energy[3], energy_min;
uint8_t noise[3], noise_ref;
int i, needs_update = 0;
/* check that we've been enabled long enough */
if ((rxena = le32toh(stats->general.load)) == 0)
return;
/* compute number of false alarms since last call for OFDM */
fa = le32toh(stats->ofdm.bad_plcp) - calib->bad_plcp_ofdm;
fa += le32toh(stats->ofdm.fa) - calib->fa_ofdm;
fa *= 200 * 1024; /* 200TU */
/* save counters values for next call */
calib->bad_plcp_ofdm = le32toh(stats->ofdm.bad_plcp);
calib->fa_ofdm = le32toh(stats->ofdm.fa);
if (fa > 50 * rxena) {
/* high false alarm count, decrease sensitivity */
DPRINTF(sc, IWN_DEBUG_CALIBRATE,
"%s: OFDM high false alarm count: %u\n", __func__, fa);
inc_clip(calib->corr_ofdm_x1, 1, 140);
inc_clip(calib->corr_ofdm_mrc_x1, 1, 270);
inc_clip(calib->corr_ofdm_x4, 1, 120);
inc_clip(calib->corr_ofdm_mrc_x4, 1, 210);
} else if (fa < 5 * rxena) {
/* low false alarm count, increase sensitivity */
DPRINTF(sc, IWN_DEBUG_CALIBRATE,
"%s: OFDM low false alarm count: %u\n", __func__, fa);
dec_clip(calib->corr_ofdm_x1, 1, 105);
dec_clip(calib->corr_ofdm_mrc_x1, 1, 220);
dec_clip(calib->corr_ofdm_x4, 1, 85);
dec_clip(calib->corr_ofdm_mrc_x4, 1, 170);
}
/* compute maximum noise among 3 antennas */
for (i = 0; i < 3; i++)
noise[i] = (le32toh(stats->general.noise[i]) >> 8) & 0xff;
val = max(noise[0], noise[1]);
val = max(noise[2], val);
/* insert it into our samples table */
calib->noise_samples[calib->cur_noise_sample] = val;
calib->cur_noise_sample = (calib->cur_noise_sample + 1) % 20;
/* compute maximum noise among last 20 samples */
noise_ref = calib->noise_samples[0];
for (i = 1; i < 20; i++)
noise_ref = max(noise_ref, calib->noise_samples[i]);
/* compute maximum energy among 3 antennas */
for (i = 0; i < 3; i++)
energy[i] = le32toh(stats->general.energy[i]);
val = min(energy[0], energy[1]);
val = min(energy[2], val);
/* insert it into our samples table */
calib->energy_samples[calib->cur_energy_sample] = val;
calib->cur_energy_sample = (calib->cur_energy_sample + 1) % 10;
/* compute minimum energy among last 10 samples */
energy_min = calib->energy_samples[0];
for (i = 1; i < 10; i++)
energy_min = max(energy_min, calib->energy_samples[i]);
energy_min += 6;
/* compute number of false alarms since last call for CCK */
fa = le32toh(stats->cck.bad_plcp) - calib->bad_plcp_cck;
fa += le32toh(stats->cck.fa) - calib->fa_cck;
fa *= 200 * 1024; /* 200TU */
/* save counters values for next call */
calib->bad_plcp_cck = le32toh(stats->cck.bad_plcp);
calib->fa_cck = le32toh(stats->cck.fa);
if (fa > 50 * rxena) {
/* high false alarm count, decrease sensitivity */
DPRINTF(sc, IWN_DEBUG_CALIBRATE,
"%s: CCK high false alarm count: %u\n", __func__, fa);
calib->cck_state = IWN_CCK_STATE_HIFA;
calib->low_fa = 0;
if (calib->corr_cck_x4 > 160) {
calib->noise_ref = noise_ref;
if (calib->energy_cck > 2)
dec_clip(calib->energy_cck, 2, energy_min);
}
if (calib->corr_cck_x4 < 160) {
calib->corr_cck_x4 = 161;
needs_update = 1;
} else
inc_clip(calib->corr_cck_x4, 3, 200);
inc_clip(calib->corr_cck_mrc_x4, 3, 400);
} else if (fa < 5 * rxena) {
/* low false alarm count, increase sensitivity */
DPRINTF(sc, IWN_DEBUG_CALIBRATE,
"%s: CCK low false alarm count: %u\n", __func__, fa);
calib->cck_state = IWN_CCK_STATE_LOFA;
calib->low_fa++;
if (calib->cck_state != 0 &&
((calib->noise_ref - noise_ref) > 2 ||
calib->low_fa > 100)) {
inc_clip(calib->energy_cck, 2, 97);
dec_clip(calib->corr_cck_x4, 3, 125);
dec_clip(calib->corr_cck_mrc_x4, 3, 200);
}
} else {
/* not worth to increase or decrease sensitivity */
DPRINTF(sc, IWN_DEBUG_CALIBRATE,
"%s: CCK normal false alarm count: %u\n", __func__, fa);
calib->low_fa = 0;
calib->noise_ref = noise_ref;
if (calib->cck_state == IWN_CCK_STATE_HIFA) {
/* previous interval had many false alarms */
dec_clip(calib->energy_cck, 8, energy_min);
}
calib->cck_state = IWN_CCK_STATE_INIT;
}
if (needs_update)
(void)iwn_send_sensitivity(sc);
#undef dec_clip
#undef inc_clip
}
int
iwn_send_sensitivity(struct iwn_softc *sc)
{
struct iwn_calib_state *calib = &sc->calib;
struct iwn_sensitivity_cmd cmd;
memset(&cmd, 0, sizeof cmd);
cmd.which = IWN_SENSITIVITY_WORKTBL;
/* OFDM modulation */
cmd.corr_ofdm_x1 = htole16(calib->corr_ofdm_x1);
cmd.corr_ofdm_mrc_x1 = htole16(calib->corr_ofdm_mrc_x1);
cmd.corr_ofdm_x4 = htole16(calib->corr_ofdm_x4);
cmd.corr_ofdm_mrc_x4 = htole16(calib->corr_ofdm_mrc_x4);
cmd.energy_ofdm = htole16(100);
cmd.energy_ofdm_th = htole16(62);
/* CCK modulation */
cmd.corr_cck_x4 = htole16(calib->corr_cck_x4);
cmd.corr_cck_mrc_x4 = htole16(calib->corr_cck_mrc_x4);
cmd.energy_cck = htole16(calib->energy_cck);
/* Barker modulation: use default values */
cmd.corr_barker = htole16(190);
cmd.corr_barker_mrc = htole16(390);
DPRINTF(sc, IWN_DEBUG_RESET,
"%s: set sensitivity %d/%d/%d/%d/%d/%d/%d\n", __func__,
calib->corr_ofdm_x1, calib->corr_ofdm_mrc_x1, calib->corr_ofdm_x4,
calib->corr_ofdm_mrc_x4, calib->corr_cck_x4,
calib->corr_cck_mrc_x4, calib->energy_cck);
return iwn_cmd(sc, IWN_SENSITIVITY, &cmd, sizeof cmd, 1);
}
int
iwn_auth(struct iwn_softc *sc, struct ieee80211vap *vap)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct ieee80211_node *ni = vap->iv_bss;
struct iwn_node_info node;
int error;
sc->calib.state = IWN_CALIB_STATE_INIT;
/* update adapter's configuration */
sc->config.associd = 0;
IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid);
sc->config.chan = htole16(ieee80211_chan2ieee(ic, ni->ni_chan));
sc->config.flags = htole32(IWN_CONFIG_TSF);
if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan))
sc->config.flags |= htole32(IWN_CONFIG_AUTO | IWN_CONFIG_24GHZ);
if (IEEE80211_IS_CHAN_A(ni->ni_chan)) {
sc->config.cck_mask = 0;
sc->config.ofdm_mask = 0x15;
} else if (IEEE80211_IS_CHAN_B(ni->ni_chan)) {
sc->config.cck_mask = 0x03;
sc->config.ofdm_mask = 0;
} else {
/* XXX assume 802.11b/g */
sc->config.cck_mask = 0x0f;
sc->config.ofdm_mask = 0x15;
}
if (ic->ic_flags & IEEE80211_F_SHSLOT)
sc->config.flags |= htole32(IWN_CONFIG_SHSLOT);
if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
sc->config.flags |= htole32(IWN_CONFIG_SHPREAMBLE);
sc->config.filter &= ~htole32(IWN_FILTER_BSS);
DPRINTF(sc, IWN_DEBUG_STATE,
"%s: config chan %d mode %d flags 0x%x cck 0x%x ofdm 0x%x "
"ht_single 0x%x ht_dual 0x%x rxchain 0x%x "
"myaddr %6D wlap %6D bssid %6D associd %d filter 0x%x\n",
__func__,
le16toh(sc->config.chan), sc->config.mode, le32toh(sc->config.flags),
sc->config.cck_mask, sc->config.ofdm_mask,
sc->config.ht_single_mask, sc->config.ht_dual_mask,
le16toh(sc->config.rxchain),
sc->config.myaddr, ":", sc->config.wlap, ":", sc->config.bssid, ":",
le16toh(sc->config.associd), le32toh(sc->config.filter));
error = iwn_cmd(sc, IWN_CMD_CONFIGURE, &sc->config,
sizeof (struct iwn_config), 1);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not configure, error %d\n", __func__, error);
return error;
}
sc->sc_curchan = ic->ic_curchan;
/* configuration has changed, set Tx power accordingly */
error = iwn_set_txpower(sc, ni->ni_chan, 1);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not set Tx power, error %d\n", __func__, error);
return error;
}
/*
* Reconfiguring clears the adapter's nodes table so we must
* add the broadcast node again.
*/
memset(&node, 0, sizeof node);
IEEE80211_ADDR_COPY(node.macaddr, ifp->if_broadcastaddr);
node.id = IWN_ID_BROADCAST;
DPRINTF(sc, IWN_DEBUG_STATE, "%s: add broadcast node\n", __func__);
error = iwn_cmd(sc, IWN_CMD_ADD_NODE, &node, sizeof node, 1);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not add broadcast node, error %d\n",
__func__, error);
return error;
}
error = iwn_set_link_quality(sc, node.id, ic->ic_curchan, 1);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not setup MRR for broadcast node, error %d\n",
__func__, error);
return error;
}
return 0;
}
/*
* Configure the adapter for associated state.
*/
int
iwn_run(struct iwn_softc *sc, struct ieee80211vap *vap)
{
#define MS(v,x) (((v) & x) >> x##_S)
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct ieee80211_node *ni = vap->iv_bss;
struct iwn_node_info node;
int error, maxrxampdu, ampdudensity;
sc->calib.state = IWN_CALIB_STATE_INIT;
if (ic->ic_opmode == IEEE80211_M_MONITOR) {
/* link LED blinks while monitoring */
iwn_set_led(sc, IWN_LED_LINK, 5, 5);
return 0;
}
iwn_enable_tsf(sc, ni);
/* update adapter's configuration */
sc->config.associd = htole16(IEEE80211_AID(ni->ni_associd));
/* short preamble/slot time are negotiated when associating */
sc->config.flags &= ~htole32(IWN_CONFIG_SHPREAMBLE | IWN_CONFIG_SHSLOT);
if (ic->ic_flags & IEEE80211_F_SHSLOT)
sc->config.flags |= htole32(IWN_CONFIG_SHSLOT);
if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
sc->config.flags |= htole32(IWN_CONFIG_SHPREAMBLE);
if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
sc->config.flags &= ~htole32(IWN_CONFIG_HT);
if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
sc->config.flags |= htole32(IWN_CONFIG_HT40U);
else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
sc->config.flags |= htole32(IWN_CONFIG_HT40D);
else
sc->config.flags |= htole32(IWN_CONFIG_HT20);
sc->config.rxchain = htole16(
(3 << IWN_RXCHAIN_VALID_S)
| (3 << IWN_RXCHAIN_MIMO_CNT_S)
| (1 << IWN_RXCHAIN_CNT_S)
| IWN_RXCHAIN_MIMO_FORCE);
maxrxampdu = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
ampdudensity = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
} else
maxrxampdu = ampdudensity = 0;
sc->config.filter |= htole32(IWN_FILTER_BSS);
DPRINTF(sc, IWN_DEBUG_STATE,
"%s: config chan %d mode %d flags 0x%x cck 0x%x ofdm 0x%x "
"ht_single 0x%x ht_dual 0x%x rxchain 0x%x "
"myaddr %6D wlap %6D bssid %6D associd %d filter 0x%x\n",
__func__,
le16toh(sc->config.chan), sc->config.mode, le32toh(sc->config.flags),
sc->config.cck_mask, sc->config.ofdm_mask,
sc->config.ht_single_mask, sc->config.ht_dual_mask,
le16toh(sc->config.rxchain),
sc->config.myaddr, ":", sc->config.wlap, ":", sc->config.bssid, ":",
le16toh(sc->config.associd), le32toh(sc->config.filter));
error = iwn_cmd(sc, IWN_CMD_CONFIGURE, &sc->config,
sizeof (struct iwn_config), 1);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not update configuration, error %d\n",
__func__, error);
return error;
}
sc->sc_curchan = ni->ni_chan;
/* configuration has changed, set Tx power accordingly */
error = iwn_set_txpower(sc, ni->ni_chan, 1);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not set Tx power, error %d\n", __func__, error);
return error;
}
/* add BSS node */
memset(&node, 0, sizeof node);
IEEE80211_ADDR_COPY(node.macaddr, ni->ni_macaddr);
node.id = IWN_ID_BSS;
node.htflags = htole32(
(maxrxampdu << IWN_MAXRXAMPDU_S) |
(ampdudensity << IWN_MPDUDENSITY_S));
DPRINTF(sc, IWN_DEBUG_STATE, "%s: add BSS node, id %d htflags 0x%x\n",
__func__, node.id, le32toh(node.htflags));
error = iwn_cmd(sc, IWN_CMD_ADD_NODE, &node, sizeof node, 1);
if (error != 0) {
device_printf(sc->sc_dev,"could not add BSS node\n");
return error;
}
error = iwn_set_link_quality(sc, node.id, ni->ni_chan, 1);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not setup MRR for node %d, error %d\n",
__func__, node.id, error);
return error;
}
error = iwn_init_sensitivity(sc);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not set sensitivity, error %d\n",
__func__, error);
return error;
}
/* start/restart periodic calibration timer */
sc->calib.state = IWN_CALIB_STATE_ASSOC;
iwn_calib_reset(sc);
/* link LED always on while associated */
iwn_set_led(sc, IWN_LED_LINK, 0, 1);
return 0;
#undef MS
}
/*
* Send a scan request to the firmware. Since this command is huge, we map it
* into a mbuf instead of using the pre-allocated set of commands.
*/
int
iwn_scan(struct iwn_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct ieee80211_scan_state *ss = ic->ic_scan; /*XXX*/
struct iwn_tx_ring *ring = &sc->txq[4];
struct iwn_tx_desc *desc;
struct iwn_tx_data *data;
struct iwn_tx_cmd *cmd;
struct iwn_cmd_data *tx;
struct iwn_scan_hdr *hdr;
struct iwn_scan_essid *essid;
struct iwn_scan_chan *chan;
struct ieee80211_frame *wh;
struct ieee80211_rateset *rs;
struct ieee80211_channel *c;
enum ieee80211_phymode mode;
uint8_t *frm;
int pktlen, error, nrates;
bus_addr_t physaddr;
desc = &ring->desc[ring->cur];
data = &ring->data[ring->cur];
/* XXX malloc */
data->m = m_getcl(M_DONTWAIT, MT_DATA, 0);
if (data->m == NULL) {
device_printf(sc->sc_dev,
"%s: could not allocate mbuf for scan command\n", __func__);
return ENOMEM;
}
cmd = mtod(data->m, struct iwn_tx_cmd *);
cmd->code = IWN_CMD_SCAN;
cmd->flags = 0;
cmd->qid = ring->qid;
cmd->idx = ring->cur;
hdr = (struct iwn_scan_hdr *)cmd->data;
memset(hdr, 0, sizeof (struct iwn_scan_hdr));
/* XXX use scan state */
/*
* Move to the next channel if no packets are received within 5 msecs
* after sending the probe request (this helps to reduce the duration
* of active scans).
*/
hdr->quiet = htole16(5); /* timeout in milliseconds */
hdr->plcp_threshold = htole16(1); /* min # of packets */
/* select Ant B and Ant C for scanning */
hdr->rxchain = htole16(0x3e1 | (7 << IWN_RXCHAIN_VALID_S));
tx = (struct iwn_cmd_data *)(hdr + 1);
memset(tx, 0, sizeof (struct iwn_cmd_data));
tx->flags = htole32(IWN_TX_AUTO_SEQ | 0x200); /* XXX */
tx->id = IWN_ID_BROADCAST;
tx->lifetime = htole32(IWN_LIFETIME_INFINITE);
tx->rflags = IWN_RFLAG_ANT_B;
if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) {
hdr->crc_threshold = htole16(1);
/* send probe requests at 6Mbps */
tx->rate = iwn_ridx_to_plcp[IWN_RATE_OFDM6];
} else {
hdr->flags = htole32(IWN_CONFIG_24GHZ | IWN_CONFIG_AUTO);
/* send probe requests at 1Mbps */
tx->rate = iwn_ridx_to_plcp[IWN_RATE_CCK1];
tx->rflags |= IWN_RFLAG_CCK;
}
essid = (struct iwn_scan_essid *)(tx + 1);
memset(essid, 0, 4 * sizeof (struct iwn_scan_essid));
essid[0].id = IEEE80211_ELEMID_SSID;
essid[0].len = ss->ss_ssid[0].len;
memcpy(essid[0].data, ss->ss_ssid[0].ssid, ss->ss_ssid[0].len);
/*
* Build a probe request frame. Most of the following code is a
* copy & paste of what is done in net80211.
*/
wh = (struct ieee80211_frame *)&essid[4];
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
IEEE80211_FC0_SUBTYPE_PROBE_REQ;
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
IEEE80211_ADDR_COPY(wh->i_addr2, IF_LLADDR(ifp));
IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr);
*(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */
*(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */
frm = (uint8_t *)(wh + 1);
/* add SSID IE */
*frm++ = IEEE80211_ELEMID_SSID;
*frm++ = ss->ss_ssid[0].len;
memcpy(frm, ss->ss_ssid[0].ssid, ss->ss_ssid[0].len);
frm += ss->ss_ssid[0].len;
mode = ieee80211_chan2mode(ic->ic_curchan);
rs = &ic->ic_sup_rates[mode];
/* add supported rates IE */
*frm++ = IEEE80211_ELEMID_RATES;
nrates = rs->rs_nrates;
if (nrates > IEEE80211_RATE_SIZE)
nrates = IEEE80211_RATE_SIZE;
*frm++ = nrates;
memcpy(frm, rs->rs_rates, nrates);
frm += nrates;
/* add supported xrates IE */
if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
*frm++ = IEEE80211_ELEMID_XRATES;
*frm++ = (uint8_t)nrates;
memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
frm += nrates;
}
/* setup length of probe request */
tx->len = htole16(frm - (uint8_t *)wh);
c = ic->ic_curchan;
chan = (struct iwn_scan_chan *)frm;
chan->chan = ieee80211_chan2ieee(ic, c);
chan->flags = 0;
if ((c->ic_flags & IEEE80211_CHAN_PASSIVE) == 0) {
chan->flags |= IWN_CHAN_ACTIVE;
if (ss->ss_nssid > 0)
chan->flags |= IWN_CHAN_DIRECT;
}
chan->dsp_gain = 0x6e;
if (IEEE80211_IS_CHAN_5GHZ(c)) {
chan->rf_gain = 0x3b;
chan->active = htole16(10);
chan->passive = htole16(110);
} else {
chan->rf_gain = 0x28;
chan->active = htole16(20);
chan->passive = htole16(120);
}
DPRINTF(sc, IWN_DEBUG_STATE, "%s: chan %u flags 0x%x rf_gain 0x%x "
"dsp_gain 0x%x active 0x%x passive 0x%x\n", __func__,
chan->chan, chan->flags, chan->rf_gain, chan->dsp_gain,
chan->active, chan->passive);
hdr->nchan++;
chan++;
frm += sizeof (struct iwn_scan_chan);
hdr->len = htole16(frm - (uint8_t *)hdr);
pktlen = frm - (uint8_t *)cmd;
error = bus_dmamap_load(ring->data_dmat, data->map, cmd, pktlen,
iwn_dma_map_addr, &physaddr, BUS_DMA_NOWAIT);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not map scan command, error %d\n",
__func__, error);
m_freem(data->m);
data->m = NULL;
return error;
}
IWN_SET_DESC_NSEGS(desc, 1);
IWN_SET_DESC_SEG(desc, 0, physaddr, pktlen);
sc->shared->len[ring->qid][ring->cur] = htole16(8);
if (ring->cur < IWN_TX_WINDOW)
sc->shared->len[ring->qid][ring->cur + IWN_TX_RING_COUNT] =
htole16(8);
bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
BUS_DMASYNC_PREWRITE);
bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
/* kick cmd ring */
ring->cur = (ring->cur + 1) % IWN_TX_RING_COUNT;
IWN_WRITE(sc, IWN_TX_WIDX, ring->qid << 8 | ring->cur);
return 0; /* will be notified async. of failure/success */
}
int
iwn_config(struct iwn_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
struct iwn_power power;
struct iwn_bluetooth bluetooth;
struct iwn_node_info node;
int error;
/* set power mode */
memset(&power, 0, sizeof power);
power.flags = htole16(IWN_POWER_CAM | 0x8);
DPRINTF(sc, IWN_DEBUG_RESET, "%s: set power mode\n", __func__);
error = iwn_cmd(sc, IWN_CMD_SET_POWER_MODE, &power, sizeof power, 0);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not set power mode, error %d\n",
__func__, error);
return error;
}
/* configure bluetooth coexistence */
memset(&bluetooth, 0, sizeof bluetooth);
bluetooth.flags = 3;
bluetooth.lead = 0xaa;
bluetooth.kill = 1;
DPRINTF(sc, IWN_DEBUG_RESET, "%s: config bluetooth coexistence\n",
__func__);
error = iwn_cmd(sc, IWN_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth,
0);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not configure bluetooth coexistence, error %d\n",
__func__, error);
return error;
}
/* configure adapter */
memset(&sc->config, 0, sizeof (struct iwn_config));
IEEE80211_ADDR_COPY(sc->config.myaddr, IF_LLADDR(ifp));
IEEE80211_ADDR_COPY(sc->config.wlap, IF_LLADDR(ifp));
/* set default channel */
sc->config.chan = htole16(ieee80211_chan2ieee(ic, ic->ic_curchan));
sc->config.flags = htole32(IWN_CONFIG_TSF);
if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
sc->config.flags |= htole32(IWN_CONFIG_AUTO | IWN_CONFIG_24GHZ);
sc->config.filter = 0;
switch (ic->ic_opmode) {
case IEEE80211_M_STA:
sc->config.mode = IWN_MODE_STA;
sc->config.filter |= htole32(IWN_FILTER_MULTICAST);
break;
case IEEE80211_M_IBSS:
case IEEE80211_M_AHDEMO:
sc->config.mode = IWN_MODE_IBSS;
break;
case IEEE80211_M_HOSTAP:
sc->config.mode = IWN_MODE_HOSTAP;
break;
case IEEE80211_M_MONITOR:
sc->config.mode = IWN_MODE_MONITOR;
sc->config.filter |= htole32(IWN_FILTER_MULTICAST |
IWN_FILTER_CTL | IWN_FILTER_PROMISC);
break;
default:
break;
}
sc->config.cck_mask = 0x0f; /* not yet negotiated */
sc->config.ofdm_mask = 0xff; /* not yet negotiated */
sc->config.ht_single_mask = 0xff;
sc->config.ht_dual_mask = 0xff;
sc->config.rxchain = htole16(0x2800 | (7 << IWN_RXCHAIN_VALID_S));
DPRINTF(sc, IWN_DEBUG_STATE,
"%s: config chan %d mode %d flags 0x%x cck 0x%x ofdm 0x%x "
"ht_single 0x%x ht_dual 0x%x rxchain 0x%x "
"myaddr %6D wlap %6D bssid %6D associd %d filter 0x%x\n",
__func__,
le16toh(sc->config.chan), sc->config.mode, le32toh(sc->config.flags),
sc->config.cck_mask, sc->config.ofdm_mask,
sc->config.ht_single_mask, sc->config.ht_dual_mask,
le16toh(sc->config.rxchain),
sc->config.myaddr, ":", sc->config.wlap, ":", sc->config.bssid, ":",
le16toh(sc->config.associd), le32toh(sc->config.filter));
error = iwn_cmd(sc, IWN_CMD_CONFIGURE, &sc->config,
sizeof (struct iwn_config), 0);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: configure command failed, error %d\n",
__func__, error);
return error;
}
sc->sc_curchan = ic->ic_curchan;
/* configuration has changed, set Tx power accordingly */
error = iwn_set_txpower(sc, ic->ic_curchan, 0);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not set Tx power, error %d\n", __func__, error);
return error;
}
/* add broadcast node */
memset(&node, 0, sizeof node);
IEEE80211_ADDR_COPY(node.macaddr, ic->ic_ifp->if_broadcastaddr);
node.id = IWN_ID_BROADCAST;
node.rate = iwn_plcp_signal(2);
DPRINTF(sc, IWN_DEBUG_RESET, "%s: add broadcast node\n", __func__);
error = iwn_cmd(sc, IWN_CMD_ADD_NODE, &node, sizeof node, 0);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not add broadcast node, error %d\n",
__func__, error);
return error;
}
error = iwn_set_link_quality(sc, node.id, ic->ic_curchan, 0);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not setup MRR for node %d, error %d\n",
__func__, node.id, error);
return error;
}
error = iwn_set_critical_temp(sc);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not set critical temperature, error %d\n",
__func__, error);
return error;
}
return 0;
}
/*
* Do post-alive initialization of the NIC (after firmware upload).
*/
void
iwn_post_alive(struct iwn_softc *sc)
{
uint32_t base;
uint16_t offset;
int qid;
iwn_mem_lock(sc);
/* clear SRAM */
base = iwn_mem_read(sc, IWN_SRAM_BASE);
for (offset = 0x380; offset < 0x520; offset += 4) {
IWN_WRITE(sc, IWN_MEM_WADDR, base + offset);
IWN_WRITE(sc, IWN_MEM_WDATA, 0);
}
/* shared area is aligned on a 1K boundary */
iwn_mem_write(sc, IWN_SRAM_BASE, sc->shared_dma.paddr >> 10);
iwn_mem_write(sc, IWN_SELECT_QCHAIN, 0);
for (qid = 0; qid < IWN_NTXQUEUES; qid++) {
iwn_mem_write(sc, IWN_QUEUE_RIDX(qid), 0);
IWN_WRITE(sc, IWN_TX_WIDX, qid << 8 | 0);
/* set sched. window size */
IWN_WRITE(sc, IWN_MEM_WADDR, base + IWN_QUEUE_OFFSET(qid));
IWN_WRITE(sc, IWN_MEM_WDATA, 64);
/* set sched. frame limit */
IWN_WRITE(sc, IWN_MEM_WADDR, base + IWN_QUEUE_OFFSET(qid) + 4);
IWN_WRITE(sc, IWN_MEM_WDATA, 10 << 16);
}
/* enable interrupts for all 16 queues */
iwn_mem_write(sc, IWN_QUEUE_INTR_MASK, 0xffff);
/* identify active Tx rings (0-7) */
iwn_mem_write(sc, IWN_TX_ACTIVE, 0xff);
/* mark Tx rings (4 EDCA + cmd + 2 HCCA) as active */
for (qid = 0; qid < 7; qid++) {
iwn_mem_write(sc, IWN_TXQ_STATUS(qid),
IWN_TXQ_STATUS_ACTIVE | qid << 1);
}
iwn_mem_unlock(sc);
}
void
iwn_stop_master(struct iwn_softc *sc)
{
uint32_t tmp;
int ntries;
tmp = IWN_READ(sc, IWN_RESET);
IWN_WRITE(sc, IWN_RESET, tmp | IWN_STOP_MASTER);
tmp = IWN_READ(sc, IWN_GPIO_CTL);
if ((tmp & IWN_GPIO_PWR_STATUS) == IWN_GPIO_PWR_SLEEP)
return; /* already asleep */
for (ntries = 0; ntries < 100; ntries++) {
if (IWN_READ(sc, IWN_RESET) & IWN_MASTER_DISABLED)
break;
DELAY(10);
}
if (ntries == 100)
device_printf(sc->sc_dev,
"%s: timeout waiting for master\n", __func__);
}
int
iwn_reset(struct iwn_softc *sc)
{
uint32_t tmp;
int ntries;
/* clear any pending interrupts */
IWN_WRITE(sc, IWN_INTR, 0xffffffff);
tmp = IWN_READ(sc, IWN_CHICKEN);
IWN_WRITE(sc, IWN_CHICKEN, tmp | IWN_CHICKEN_DISLOS);
tmp = IWN_READ(sc, IWN_GPIO_CTL);
IWN_WRITE(sc, IWN_GPIO_CTL, tmp | IWN_GPIO_INIT);
/* wait for clock stabilization */
for (ntries = 0; ntries < 1000; ntries++) {
if (IWN_READ(sc, IWN_GPIO_CTL) & IWN_GPIO_CLOCK)
break;
DELAY(10);
}
if (ntries == 1000) {
device_printf(sc->sc_dev,
"%s: timeout waiting for clock stabilization\n", __func__);
return ETIMEDOUT;
}
return 0;
}
void
iwn_hw_config(struct iwn_softc *sc)
{
uint32_t tmp, hw;
/* enable interrupts mitigation */
IWN_WRITE(sc, IWN_INTR_MIT, 512 / 32);
/* voodoo from the reference driver */
tmp = pci_read_config(sc->sc_dev, PCIR_REVID,1);
if ((tmp & 0x80) && (tmp & 0x7f) < 8) {
/* enable "no snoop" field */
tmp = pci_read_config(sc->sc_dev, 0xe8, 1);
tmp &= ~IWN_DIS_NOSNOOP;
/* clear device specific PCI configuration register 0x41 */
pci_write_config(sc->sc_dev, 0xe8, tmp, 1);
}
/* disable L1 entry to work around a hardware bug */
tmp = pci_read_config(sc->sc_dev, 0xf0, 1);
tmp &= ~IWN_ENA_L1;
pci_write_config(sc->sc_dev, 0xf0, tmp, 1 );
hw = IWN_READ(sc, IWN_HWCONFIG);
IWN_WRITE(sc, IWN_HWCONFIG, hw | 0x310);
iwn_mem_lock(sc);
tmp = iwn_mem_read(sc, IWN_MEM_POWER);
iwn_mem_write(sc, IWN_MEM_POWER, tmp | IWN_POWER_RESET);
DELAY(5);
tmp = iwn_mem_read(sc, IWN_MEM_POWER);
iwn_mem_write(sc, IWN_MEM_POWER, tmp & ~IWN_POWER_RESET);
iwn_mem_unlock(sc);
}
void
iwn_init_locked(struct iwn_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
uint32_t tmp;
int error, qid;
IWN_LOCK_ASSERT(sc);
/* load the firmware */
if (sc->fw_fp == NULL && (error = iwn_load_firmware(sc)) != 0) {
device_printf(sc->sc_dev,
"%s: could not load firmware, error %d\n", __func__, error);
return;
}
error = iwn_reset(sc);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not reset adapter, error %d\n", __func__, error);
return;
}
iwn_mem_lock(sc);
iwn_mem_read(sc, IWN_CLOCK_CTL);
iwn_mem_write(sc, IWN_CLOCK_CTL, 0xa00);
iwn_mem_read(sc, IWN_CLOCK_CTL);
iwn_mem_unlock(sc);
DELAY(20);
iwn_mem_lock(sc);
tmp = iwn_mem_read(sc, IWN_MEM_PCIDEV);
iwn_mem_write(sc, IWN_MEM_PCIDEV, tmp | 0x800);
iwn_mem_unlock(sc);
iwn_mem_lock(sc);
tmp = iwn_mem_read(sc, IWN_MEM_POWER);
iwn_mem_write(sc, IWN_MEM_POWER, tmp & ~0x03000000);
iwn_mem_unlock(sc);
iwn_hw_config(sc);
/* init Rx ring */
iwn_mem_lock(sc);
IWN_WRITE(sc, IWN_RX_CONFIG, 0);
IWN_WRITE(sc, IWN_RX_WIDX, 0);
/* Rx ring is aligned on a 256-byte boundary */
IWN_WRITE(sc, IWN_RX_BASE, sc->rxq.desc_dma.paddr >> 8);
/* shared area is aligned on a 16-byte boundary */
IWN_WRITE(sc, IWN_RW_WIDX_PTR, (sc->shared_dma.paddr +
offsetof(struct iwn_shared, closed_count)) >> 4);
IWN_WRITE(sc, IWN_RX_CONFIG, 0x80601000);
iwn_mem_unlock(sc);
IWN_WRITE(sc, IWN_RX_WIDX, (IWN_RX_RING_COUNT - 1) & ~7);
iwn_mem_lock(sc);
iwn_mem_write(sc, IWN_TX_ACTIVE, 0);
/* set physical address of "keep warm" page */
IWN_WRITE(sc, IWN_KW_BASE, sc->kw_dma.paddr >> 4);
/* init Tx rings */
for (qid = 0; qid < IWN_NTXQUEUES; qid++) {
struct iwn_tx_ring *txq = &sc->txq[qid];
IWN_WRITE(sc, IWN_TX_BASE(qid), txq->desc_dma.paddr >> 8);
IWN_WRITE(sc, IWN_TX_CONFIG(qid), 0x80000008);
}
iwn_mem_unlock(sc);
/* clear "radio off" and "disable command" bits (reversed logic) */
IWN_WRITE(sc, IWN_UCODE_CLR, IWN_RADIO_OFF);
IWN_WRITE(sc, IWN_UCODE_CLR, IWN_DISABLE_CMD);
/* clear any pending interrupts */
IWN_WRITE(sc, IWN_INTR, 0xffffffff);
/* enable interrupts */
IWN_WRITE(sc, IWN_MASK, IWN_INTR_MASK);
/* not sure why/if this is necessary... */
IWN_WRITE(sc, IWN_UCODE_CLR, IWN_RADIO_OFF);
IWN_WRITE(sc, IWN_UCODE_CLR, IWN_RADIO_OFF);
/* check that the radio is not disabled by RF switch */
if (!(IWN_READ(sc, IWN_GPIO_CTL) & IWN_GPIO_RF_ENABLED)) {
device_printf(sc->sc_dev,
"radio is disabled by hardware switch\n");
return;
}
error = iwn_transfer_firmware(sc);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not load firmware, error %d\n", __func__, error);
return;
}
/* firmware has notified us that it is alive.. */
iwn_post_alive(sc); /* ..do post alive initialization */
sc->rawtemp = sc->ucode_info.temp[3].chan20MHz;
sc->temp = iwn_get_temperature(sc);
DPRINTF(sc, IWN_DEBUG_RESET, "%s: temperature=%d\n",
__func__, sc->temp);
error = iwn_config(sc);
if (error != 0) {
device_printf(sc->sc_dev,
"%s: could not configure device, error %d\n",
__func__, error);
return;
}
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
ifp->if_drv_flags |= IFF_DRV_RUNNING;
}
void
iwn_init(void *arg)
{
struct iwn_softc *sc = arg;
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
IWN_LOCK(sc);
iwn_init_locked(sc);
IWN_UNLOCK(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
ieee80211_start_all(ic);
}
void
iwn_stop_locked(struct iwn_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
uint32_t tmp;
int i;
IWN_LOCK_ASSERT(sc);
IWN_WRITE(sc, IWN_RESET, IWN_NEVO_RESET);
sc->sc_tx_timer = 0;
callout_stop(&sc->sc_timer_to);
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
/* disable interrupts */
IWN_WRITE(sc, IWN_MASK, 0);
IWN_WRITE(sc, IWN_INTR, 0xffffffff);
IWN_WRITE(sc, IWN_INTR_STATUS, 0xffffffff);
/* reset all Tx rings */
for (i = 0; i < IWN_NTXQUEUES; i++)
iwn_reset_tx_ring(sc, &sc->txq[i]);
/* reset Rx ring */
iwn_reset_rx_ring(sc, &sc->rxq);
iwn_mem_lock(sc);
iwn_mem_write(sc, IWN_MEM_CLOCK2, 0x200);
iwn_mem_unlock(sc);
DELAY(5);
iwn_stop_master(sc);
tmp = IWN_READ(sc, IWN_RESET);
IWN_WRITE(sc, IWN_RESET, tmp | IWN_SW_RESET);
}
void
iwn_stop(struct iwn_softc *sc)
{
IWN_LOCK(sc);
iwn_stop_locked(sc);
IWN_UNLOCK(sc);
}
/*
* Callback from net80211 to start a scan.
*/
static void
iwn_scan_start(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
struct iwn_softc *sc = ifp->if_softc;
IWN_LOCK(sc);
/* make the link LED blink while we're scanning */
iwn_set_led(sc, IWN_LED_LINK, 20, 2);
IWN_UNLOCK(sc);
}
/*
* Callback from net80211 to terminate a scan.
*/
static void
iwn_scan_end(struct ieee80211com *ic)
{
/* ignore */
}
/*
* Callback from net80211 to force a channel change.
*/
static void
iwn_set_channel(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
struct iwn_softc *sc = ifp->if_softc;
struct ieee80211vap *vap;
const struct ieee80211_channel *c = ic->ic_curchan;
int error;
vap = TAILQ_FIRST(&ic->ic_vaps); /* XXX */
IWN_LOCK(sc);
if (c != sc->sc_curchan) {
sc->sc_rxtap.wr_chan_freq = htole16(c->ic_freq);
sc->sc_rxtap.wr_chan_flags = htole16(c->ic_flags);
sc->sc_txtap.wt_chan_freq = htole16(c->ic_freq);
sc->sc_txtap.wt_chan_flags = htole16(c->ic_flags);
error = iwn_config(sc);
if (error != 0) {
DPRINTF(sc, IWN_DEBUG_STATE,
"%s: set chan failed, cancel scan\n",
__func__);
//XXX Handle failed scan correctly
ieee80211_cancel_scan(vap);
}
}
IWN_UNLOCK(sc);
}
/*
* Callback from net80211 to start scanning of the current channel.
*/
static void
iwn_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
{
struct ieee80211vap *vap = ss->ss_vap;
struct iwn_softc *sc = vap->iv_ic->ic_ifp->if_softc;
int error;
IWN_LOCK(sc);
error = iwn_scan(sc);
IWN_UNLOCK(sc);
if (error != 0)
ieee80211_cancel_scan(vap);
}
/*
* Callback from net80211 to handle the minimum dwell time being met.
* The intent is to terminate the scan but we just let the firmware
* notify us when it's finished as we have no safe way to abort it.
*/
static void
iwn_scan_mindwell(struct ieee80211_scan_state *ss)
{
/* NB: don't try to abort scan; wait for firmware to finish */
}
static void
iwn_hwreset(void *arg0, int pending)
{
struct iwn_softc *sc = arg0;
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
iwn_init(sc);
ieee80211_notify_radio(ic, 1);
}
static void
iwn_radioon(void *arg0, int pending)
{
struct iwn_softc *sc = arg0;
iwn_init(sc);
}
static void
iwn_radiooff(void *arg0, int pending)
{
struct iwn_softc *sc = arg0;
struct ifnet *ifp = sc->sc_ifp;
struct ieee80211com *ic = ifp->if_l2com;
IWN_LOCK(sc);
ieee80211_notify_radio(ic, 0);
iwn_stop_locked(sc);
IWN_UNLOCK(sc);
}
static void
iwn_bpfattach(struct iwn_softc *sc)
{
struct ifnet *ifp = sc->sc_ifp;
bpfattach(ifp, DLT_IEEE802_11_RADIO,
sizeof (struct ieee80211_frame) + sizeof (sc->sc_txtap));
sc->sc_rxtap_len = sizeof sc->sc_rxtap;
sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
sc->sc_rxtap.wr_ihdr.it_present = htole32(IWN_RX_RADIOTAP_PRESENT);
sc->sc_txtap_len = sizeof sc->sc_txtap;
sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
sc->sc_txtap.wt_ihdr.it_present = htole32(IWN_TX_RADIOTAP_PRESENT);
}
static void
iwn_sysctlattach(struct iwn_softc *sc)
{
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev);
struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev);
#ifdef IWN_DEBUG
sc->sc_debug = 0;
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"debug", CTLFLAG_RW, &sc->sc_debug, 0, "control debugging printfs");
#endif
}
#ifdef IWN_DEBUG
static const char *
iwn_intr_str(uint8_t cmd)
{
switch (cmd) {
/* Notifications */
case IWN_UC_READY: return "UC_READY";
case IWN_ADD_NODE_DONE: return "ADD_NODE_DONE";
case IWN_TX_DONE: return "TX_DONE";
case IWN_START_SCAN: return "START_SCAN";
case IWN_STOP_SCAN: return "STOP_SCAN";
case IWN_RX_STATISTICS: return "RX_STATS";
case IWN_BEACON_STATISTICS: return "BEACON_STATS";
case IWN_STATE_CHANGED: return "STATE_CHANGED";
case IWN_BEACON_MISSED: return "BEACON_MISSED";
case IWN_AMPDU_RX_START: return "AMPDU_RX_START";
case IWN_AMPDU_RX_DONE: return "AMPDU_RX_DONE";
case IWN_RX_DONE: return "RX_DONE";
/* Command Notifications */
case IWN_CMD_CONFIGURE: return "IWN_CMD_CONFIGURE";
case IWN_CMD_ASSOCIATE: return "IWN_CMD_ASSOCIATE";
case IWN_CMD_EDCA_PARAMS: return "IWN_CMD_EDCA_PARAMS";
case IWN_CMD_TSF: return "IWN_CMD_TSF";
case IWN_CMD_TX_LINK_QUALITY: return "IWN_CMD_TX_LINK_QUALITY";
case IWN_CMD_SET_LED: return "IWN_CMD_SET_LED";
case IWN_CMD_SET_POWER_MODE: return "IWN_CMD_SET_POWER_MODE";
case IWN_CMD_SCAN: return "IWN_CMD_SCAN";
case IWN_CMD_TXPOWER: return "IWN_CMD_TXPOWER";
case IWN_CMD_BLUETOOTH: return "IWN_CMD_BLUETOOTH";
case IWN_CMD_SET_CRITICAL_TEMP: return "IWN_CMD_SET_CRITICAL_TEMP";
case IWN_SENSITIVITY: return "IWN_SENSITIVITY";
case IWN_PHY_CALIB: return "IWN_PHY_CALIB";
}
return "UNKNOWN INTR NOTIF/CMD";
}
#endif /* IWN_DEBUG */
static device_method_t iwn_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, iwn_probe),
DEVMETHOD(device_attach, iwn_attach),
DEVMETHOD(device_detach, iwn_detach),
DEVMETHOD(device_shutdown, iwn_shutdown),
DEVMETHOD(device_suspend, iwn_suspend),
DEVMETHOD(device_resume, iwn_resume),
{ 0, 0 }
};
static driver_t iwn_driver = {
"iwn",
iwn_methods,
sizeof (struct iwn_softc)
};
static devclass_t iwn_devclass;
DRIVER_MODULE(iwn, pci, iwn_driver, iwn_devclass, 0, 0);
MODULE_DEPEND(iwn, pci, 1, 1, 1);
MODULE_DEPEND(iwn, firmware, 1, 1, 1);
MODULE_DEPEND(iwn, wlan, 1, 1, 1);
MODULE_DEPEND(iwn, wlan_amrr, 1, 1, 1);
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