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File: [local] / sys / net80211 / ieee80211_amrr.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:15:35 2008 UTC (16 years, 6 months ago) by nbrk
Import of OpenBSD 4.2 release kernel tree with initial code to support Jornada 720/728, StrongARM 1110-based handheld PC. At this point kernel roots on NFS and boots into vfs_mountroot() and traps. What is supported: - glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode (needs some palette tweaks for non black/white/blue colors, i think) - saic, SA11x0 interrupt controller (needs cleanup) - sacom, SA11x0 UART (supported only as boot console for now) - SA11x0 GPIO controller fully supported (but can't handle multiple interrupt handlers on one gpio pin) - sassp, SSP port on SA11x0 that attaches spibus - Jornada microcontroller (jmcu) to control kbd, battery, etc throught the SPI bus (wskbd attaches on jmcu, but not tested) - tod functions seem work - initial code for SA-1111 (chip companion) : this is TODO Next important steps, i think: - gpio and intc on sa1111 - pcmcia support for sa11x0 (and sa1111 help logic) - REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs) - root on wd0! (using already supported PCMCIA-ATA) |
/* $OpenBSD: ieee80211_amrr.c,v 1.3 2007/06/16 13:17:05 damien Exp $ */ /*- * Copyright (c) 2006 * Damien Bergamini <damien.bergamini@free.fr> * * 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. */ #include <sys/param.h> #include <sys/kernel.h> #include <sys/socket.h> #include <sys/sysctl.h> #include <net/if.h> #include <net/if_media.h> #ifdef INET #include <netinet/in.h> #include <netinet/if_ether.h> #endif #include <net80211/ieee80211_var.h> #include <net80211/ieee80211_amrr.h> #define is_success(amn) \ ((amn)->amn_retrycnt < (amn)->amn_txcnt / 10) #define is_failure(amn) \ ((amn)->amn_retrycnt > (amn)->amn_txcnt / 3) #define is_enough(amn) \ ((amn)->amn_txcnt > 10) #define is_min_rate(ni) \ ((ni)->ni_txrate == 0) #define is_max_rate(ni) \ ((ni)->ni_txrate == (ni)->ni_rates.rs_nrates - 1) #define increase_rate(ni) \ ((ni)->ni_txrate++) #define decrease_rate(ni) \ ((ni)->ni_txrate--) #define reset_cnt(amn) \ do { (amn)->amn_txcnt = (amn)->amn_retrycnt = 0; } while (0) void ieee80211_amrr_node_init(const struct ieee80211_amrr *amrr, struct ieee80211_amrr_node *amn) { amn->amn_success = 0; amn->amn_recovery = 0; amn->amn_txcnt = amn->amn_retrycnt = 0; amn->amn_success_threshold = amrr->amrr_min_success_threshold; } /* * Update ni->ni_txrate. */ void ieee80211_amrr_choose(struct ieee80211_amrr *amrr, struct ieee80211_node *ni, struct ieee80211_amrr_node *amn) { int need_change = 0; if (is_success(amn) && is_enough(amn)) { amn->amn_success++; if (amn->amn_success >= amn->amn_success_threshold && !is_max_rate(ni)) { amn->amn_recovery = 1; amn->amn_success = 0; increase_rate(ni); IEEE80211_DPRINTF(("AMRR increasing rate %d (txcnt=%d " "retrycnt=%d)\n", ni->ni_rates.rs_rates[ni->ni_txrate] & IEEE80211_RATE_VAL, amn->amn_txcnt, amn->amn_retrycnt)); need_change = 1; } else { amn->amn_recovery = 0; } } else if (is_failure(amn)) { amn->amn_success = 0; if (!is_min_rate(ni)) { if (amn->amn_recovery) { amn->amn_success_threshold *= 2; if (amn->amn_success_threshold > amrr->amrr_max_success_threshold) amn->amn_success_threshold = amrr->amrr_max_success_threshold; } else { amn->amn_success_threshold = amrr->amrr_min_success_threshold; } decrease_rate(ni); IEEE80211_DPRINTF(("AMRR decreasing rate %d (txcnt=%d " "retrycnt=%d)\n", ni->ni_rates.rs_rates[ni->ni_txrate] & IEEE80211_RATE_VAL, amn->amn_txcnt, amn->amn_retrycnt)); need_change = 1; } amn->amn_recovery = 0; } if (is_enough(amn) || need_change) reset_cnt(amn); }