diff options
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/net/ath/ath_hw.c')
| -rw-r--r-- | qemu/roms/ipxe/src/drivers/net/ath/ath_hw.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/qemu/roms/ipxe/src/drivers/net/ath/ath_hw.c b/qemu/roms/ipxe/src/drivers/net/ath/ath_hw.c deleted file mode 100644 index 8e3128868..000000000 --- a/qemu/roms/ipxe/src/drivers/net/ath/ath_hw.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Copyright (c) 2009 Atheros Communications Inc. - * - * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011 - * Original from Linux kernel 3.0.1 - * - * Permission to use, copy, modify, and/or 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 <ipxe/io.h> - -#include "ath.h" -#include "reg.h" - -#define REG_READ (common->ops->read) -#define REG_WRITE (common->ops->write) - -/** - * ath_hw_set_bssid_mask - filter out bssids we listen - * - * @common: the ath_common struct for the device. - * - * BSSID masking is a method used by AR5212 and newer hardware to inform PCU - * which bits of the interface's MAC address should be looked at when trying - * to decide which packets to ACK. In station mode and AP mode with a single - * BSS every bit matters since we lock to only one BSS. In AP mode with - * multiple BSSes (virtual interfaces) not every bit matters because hw must - * accept frames for all BSSes and so we tweak some bits of our mac address - * in order to have multiple BSSes. - * - * NOTE: This is a simple filter and does *not* filter out all - * relevant frames. Some frames that are not for us might get ACKed from us - * by PCU because they just match the mask. - * - * When handling multiple BSSes you can get the BSSID mask by computing the - * set of ~ ( MAC XOR BSSID ) for all bssids we handle. - * - * When you do this you are essentially computing the common bits of all your - * BSSes. Later it is assumed the hardware will "and" (&) the BSSID mask with - * the MAC address to obtain the relevant bits and compare the result with - * (frame's BSSID & mask) to see if they match. - * - * Simple example: on your card you have have two BSSes you have created with - * BSSID-01 and BSSID-02. Lets assume BSSID-01 will not use the MAC address. - * There is another BSSID-03 but you are not part of it. For simplicity's sake, - * assuming only 4 bits for a mac address and for BSSIDs you can then have: - * - * \ - * MAC: 0001 | - * BSSID-01: 0100 | --> Belongs to us - * BSSID-02: 1001 | - * / - * ------------------- - * BSSID-03: 0110 | --> External - * ------------------- - * - * Our bssid_mask would then be: - * - * On loop iteration for BSSID-01: - * ~(0001 ^ 0100) -> ~(0101) - * -> 1010 - * bssid_mask = 1010 - * - * On loop iteration for BSSID-02: - * bssid_mask &= ~(0001 ^ 1001) - * bssid_mask = (1010) & ~(0001 ^ 1001) - * bssid_mask = (1010) & ~(1000) - * bssid_mask = (1010) & (0111) - * bssid_mask = 0010 - * - * A bssid_mask of 0010 means "only pay attention to the second least - * significant bit". This is because its the only bit common - * amongst the MAC and all BSSIDs we support. To findout what the real - * common bit is we can simply "&" the bssid_mask now with any BSSID we have - * or our MAC address (we assume the hardware uses the MAC address). - * - * Now, suppose there's an incoming frame for BSSID-03: - * - * IFRAME-01: 0110 - * - * An easy eye-inspeciton of this already should tell you that this frame - * will not pass our check. This is because the bssid_mask tells the - * hardware to only look at the second least significant bit and the - * common bit amongst the MAC and BSSIDs is 0, this frame has the 2nd LSB - * as 1, which does not match 0. - * - * So with IFRAME-01 we *assume* the hardware will do: - * - * allow = (IFRAME-01 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0; - * --> allow = (0110 & 0010) == (0010 & 0001) ? 1 : 0; - * --> allow = (0010) == 0000 ? 1 : 0; - * --> allow = 0 - * - * Lets now test a frame that should work: - * - * IFRAME-02: 0001 (we should allow) - * - * allow = (IFRAME-02 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0; - * --> allow = (0001 & 0010) == (0010 & 0001) ? 1 :0; - * --> allow = (0000) == (0000) - * --> allow = 1 - * - * Other examples: - * - * IFRAME-03: 0100 --> allowed - * IFRAME-04: 1001 --> allowed - * IFRAME-05: 1101 --> allowed but its not for us!!! - * - */ -void ath_hw_setbssidmask(struct ath_common *common) -{ - void *ah = common->ah; - - REG_WRITE(ah, get_unaligned_le32(common->bssidmask), AR_BSSMSKL); - REG_WRITE(ah, get_unaligned_le16(common->bssidmask + 4), AR_BSSMSKU); -} - - -/** - * ath_hw_cycle_counters_update - common function to update cycle counters - * - * @common: the ath_common struct for the device. - * - * This function is used to update all cycle counters in one place. - * It has to be called while holding common->cc_lock! - */ -void ath_hw_cycle_counters_update(struct ath_common *common) -{ - u32 cycles, busy, rx, tx; - void *ah = common->ah; - - /* freeze */ - REG_WRITE(ah, AR_MIBC_FMC, AR_MIBC); - - /* read */ - cycles = REG_READ(ah, AR_CCCNT); - busy = REG_READ(ah, AR_RCCNT); - rx = REG_READ(ah, AR_RFCNT); - tx = REG_READ(ah, AR_TFCNT); - - /* clear */ - REG_WRITE(ah, 0, AR_CCCNT); - REG_WRITE(ah, 0, AR_RFCNT); - REG_WRITE(ah, 0, AR_RCCNT); - REG_WRITE(ah, 0, AR_TFCNT); - - /* unfreeze */ - REG_WRITE(ah, 0, AR_MIBC); - - /* update all cycle counters here */ - common->cc_ani.cycles += cycles; - common->cc_ani.rx_busy += busy; - common->cc_ani.rx_frame += rx; - common->cc_ani.tx_frame += tx; - - common->cc_survey.cycles += cycles; - common->cc_survey.rx_busy += busy; - common->cc_survey.rx_frame += rx; - common->cc_survey.tx_frame += tx; -} - -int32_t ath_hw_get_listen_time(struct ath_common *common) -{ - struct ath_cycle_counters *cc = &common->cc_ani; - int32_t listen_time; - - listen_time = (cc->cycles - cc->rx_frame - cc->tx_frame) / - (common->clockrate * 1000); - - memset(cc, 0, sizeof(*cc)); - - return listen_time; -} |