| /* |
| * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org> |
| * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com> |
| * Copyright (c) 2007-2008 Pavel Roskin <proski@gnu.org> |
| * |
| * 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. |
| * |
| */ |
| |
| /******************************\ |
| Hardware Descriptor Functions |
| \******************************/ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include "ath5k.h" |
| #include "reg.h" |
| #include "debug.h" |
| |
| |
| /** |
| * DOC: Hardware descriptor functions |
| * |
| * Here we handle the processing of the low-level hw descriptors |
| * that hw reads and writes via DMA for each TX and RX attempt (that means |
| * we can also have descriptors for failed TX/RX tries). We have two kind of |
| * descriptors for RX and TX, control descriptors tell the hw how to send or |
| * receive a packet where to read/write it from/to etc and status descriptors |
| * that contain information about how the packet was sent or received (errors |
| * included). |
| * |
| * Descriptor format is not exactly the same for each MAC chip version so we |
| * have function pointers on &struct ath5k_hw we initialize at runtime based on |
| * the chip used. |
| */ |
| |
| |
| /************************\ |
| * TX Control descriptors * |
| \************************/ |
| |
| /** |
| * ath5k_hw_setup_2word_tx_desc() - Initialize a 2-word tx control descriptor |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @pkt_len: Frame length in bytes |
| * @hdr_len: Header length in bytes (only used on AR5210) |
| * @padsize: Any padding we've added to the frame length |
| * @type: One of enum ath5k_pkt_type |
| * @tx_power: Tx power in 0.5dB steps |
| * @tx_rate0: HW idx for transmission rate |
| * @tx_tries0: Max number of retransmissions |
| * @key_index: Index on key table to use for encryption |
| * @antenna_mode: Which antenna to use (0 for auto) |
| * @flags: One of AR5K_TXDESC_* flags (desc.h) |
| * @rtscts_rate: HW idx for RTS/CTS transmission rate |
| * @rtscts_duration: What to put on duration field on the header of RTS/CTS |
| * |
| * Internal function to initialize a 2-Word TX control descriptor |
| * found on AR5210 and AR5211 MACs chips. |
| * |
| * Returns 0 on success or -EINVAL on false input |
| */ |
| static int |
| ath5k_hw_setup_2word_tx_desc(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| unsigned int pkt_len, unsigned int hdr_len, |
| int padsize, |
| enum ath5k_pkt_type type, |
| unsigned int tx_power, |
| unsigned int tx_rate0, unsigned int tx_tries0, |
| unsigned int key_index, |
| unsigned int antenna_mode, |
| unsigned int flags, |
| unsigned int rtscts_rate, unsigned int rtscts_duration) |
| { |
| u32 frame_type; |
| struct ath5k_hw_2w_tx_ctl *tx_ctl; |
| unsigned int frame_len; |
| |
| tx_ctl = &desc->ud.ds_tx5210.tx_ctl; |
| |
| /* |
| * Validate input |
| * - Zero retries don't make sense. |
| * - A zero rate will put the HW into a mode where it continuously sends |
| * noise on the channel, so it is important to avoid this. |
| */ |
| if (unlikely(tx_tries0 == 0)) { |
| ATH5K_ERR(ah, "zero retries\n"); |
| WARN_ON(1); |
| return -EINVAL; |
| } |
| if (unlikely(tx_rate0 == 0)) { |
| ATH5K_ERR(ah, "zero rate\n"); |
| WARN_ON(1); |
| return -EINVAL; |
| } |
| |
| /* Clear descriptor */ |
| memset(&desc->ud.ds_tx5210, 0, sizeof(struct ath5k_hw_5210_tx_desc)); |
| |
| /* Setup control descriptor */ |
| |
| /* Verify and set frame length */ |
| |
| /* remove padding we might have added before */ |
| frame_len = pkt_len - padsize + FCS_LEN; |
| |
| if (frame_len & ~AR5K_2W_TX_DESC_CTL0_FRAME_LEN) |
| return -EINVAL; |
| |
| tx_ctl->tx_control_0 = frame_len & AR5K_2W_TX_DESC_CTL0_FRAME_LEN; |
| |
| /* Verify and set buffer length */ |
| |
| /* NB: beacon's BufLen must be a multiple of 4 bytes */ |
| if (type == AR5K_PKT_TYPE_BEACON) |
| pkt_len = roundup(pkt_len, 4); |
| |
| if (pkt_len & ~AR5K_2W_TX_DESC_CTL1_BUF_LEN) |
| return -EINVAL; |
| |
| tx_ctl->tx_control_1 = pkt_len & AR5K_2W_TX_DESC_CTL1_BUF_LEN; |
| |
| /* |
| * Verify and set header length (only 5210) |
| */ |
| if (ah->ah_version == AR5K_AR5210) { |
| if (hdr_len & ~AR5K_2W_TX_DESC_CTL0_HEADER_LEN_5210) |
| return -EINVAL; |
| tx_ctl->tx_control_0 |= |
| AR5K_REG_SM(hdr_len, AR5K_2W_TX_DESC_CTL0_HEADER_LEN_5210); |
| } |
| |
| /*Differences between 5210-5211*/ |
| if (ah->ah_version == AR5K_AR5210) { |
| switch (type) { |
| case AR5K_PKT_TYPE_BEACON: |
| case AR5K_PKT_TYPE_PROBE_RESP: |
| frame_type = AR5K_AR5210_TX_DESC_FRAME_TYPE_NO_DELAY; |
| break; |
| case AR5K_PKT_TYPE_PIFS: |
| frame_type = AR5K_AR5210_TX_DESC_FRAME_TYPE_PIFS; |
| break; |
| default: |
| frame_type = type; |
| break; |
| } |
| |
| tx_ctl->tx_control_0 |= |
| AR5K_REG_SM(frame_type, AR5K_2W_TX_DESC_CTL0_FRAME_TYPE_5210) | |
| AR5K_REG_SM(tx_rate0, AR5K_2W_TX_DESC_CTL0_XMIT_RATE); |
| |
| } else { |
| tx_ctl->tx_control_0 |= |
| AR5K_REG_SM(tx_rate0, AR5K_2W_TX_DESC_CTL0_XMIT_RATE) | |
| AR5K_REG_SM(antenna_mode, |
| AR5K_2W_TX_DESC_CTL0_ANT_MODE_XMIT); |
| tx_ctl->tx_control_1 |= |
| AR5K_REG_SM(type, AR5K_2W_TX_DESC_CTL1_FRAME_TYPE_5211); |
| } |
| |
| #define _TX_FLAGS(_c, _flag) \ |
| if (flags & AR5K_TXDESC_##_flag) { \ |
| tx_ctl->tx_control_##_c |= \ |
| AR5K_2W_TX_DESC_CTL##_c##_##_flag; \ |
| } |
| #define _TX_FLAGS_5211(_c, _flag) \ |
| if (flags & AR5K_TXDESC_##_flag) { \ |
| tx_ctl->tx_control_##_c |= \ |
| AR5K_2W_TX_DESC_CTL##_c##_##_flag##_5211; \ |
| } |
| _TX_FLAGS(0, CLRDMASK); |
| _TX_FLAGS(0, INTREQ); |
| _TX_FLAGS(0, RTSENA); |
| |
| if (ah->ah_version == AR5K_AR5211) { |
| _TX_FLAGS_5211(0, VEOL); |
| _TX_FLAGS_5211(1, NOACK); |
| } |
| |
| #undef _TX_FLAGS |
| #undef _TX_FLAGS_5211 |
| |
| /* |
| * WEP crap |
| */ |
| if (key_index != AR5K_TXKEYIX_INVALID) { |
| tx_ctl->tx_control_0 |= |
| AR5K_2W_TX_DESC_CTL0_ENCRYPT_KEY_VALID; |
| tx_ctl->tx_control_1 |= |
| AR5K_REG_SM(key_index, |
| AR5K_2W_TX_DESC_CTL1_ENC_KEY_IDX); |
| } |
| |
| /* |
| * RTS/CTS Duration [5210 ?] |
| */ |
| if ((ah->ah_version == AR5K_AR5210) && |
| (flags & (AR5K_TXDESC_RTSENA | AR5K_TXDESC_CTSENA))) |
| tx_ctl->tx_control_1 |= rtscts_duration & |
| AR5K_2W_TX_DESC_CTL1_RTS_DURATION_5210; |
| |
| return 0; |
| } |
| |
| /** |
| * ath5k_hw_setup_4word_tx_desc() - Initialize a 4-word tx control descriptor |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @pkt_len: Frame length in bytes |
| * @hdr_len: Header length in bytes (only used on AR5210) |
| * @padsize: Any padding we've added to the frame length |
| * @type: One of enum ath5k_pkt_type |
| * @tx_power: Tx power in 0.5dB steps |
| * @tx_rate0: HW idx for transmission rate |
| * @tx_tries0: Max number of retransmissions |
| * @key_index: Index on key table to use for encryption |
| * @antenna_mode: Which antenna to use (0 for auto) |
| * @flags: One of AR5K_TXDESC_* flags (desc.h) |
| * @rtscts_rate: HW idx for RTS/CTS transmission rate |
| * @rtscts_duration: What to put on duration field on the header of RTS/CTS |
| * |
| * Internal function to initialize a 4-Word TX control descriptor |
| * found on AR5212 and later MACs chips. |
| * |
| * Returns 0 on success or -EINVAL on false input |
| */ |
| static int |
| ath5k_hw_setup_4word_tx_desc(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| unsigned int pkt_len, unsigned int hdr_len, |
| int padsize, |
| enum ath5k_pkt_type type, |
| unsigned int tx_power, |
| unsigned int tx_rate0, unsigned int tx_tries0, |
| unsigned int key_index, |
| unsigned int antenna_mode, |
| unsigned int flags, |
| unsigned int rtscts_rate, unsigned int rtscts_duration) |
| { |
| struct ath5k_hw_4w_tx_ctl *tx_ctl; |
| unsigned int frame_len; |
| |
| /* |
| * Use local variables for these to reduce load/store access on |
| * uncached memory |
| */ |
| u32 txctl0 = 0, txctl1 = 0, txctl2 = 0, txctl3 = 0; |
| |
| tx_ctl = &desc->ud.ds_tx5212.tx_ctl; |
| |
| /* |
| * Validate input |
| * - Zero retries don't make sense. |
| * - A zero rate will put the HW into a mode where it continuously sends |
| * noise on the channel, so it is important to avoid this. |
| */ |
| if (unlikely(tx_tries0 == 0)) { |
| ATH5K_ERR(ah, "zero retries\n"); |
| WARN_ON(1); |
| return -EINVAL; |
| } |
| if (unlikely(tx_rate0 == 0)) { |
| ATH5K_ERR(ah, "zero rate\n"); |
| WARN_ON(1); |
| return -EINVAL; |
| } |
| |
| tx_power += ah->ah_txpower.txp_offset; |
| if (tx_power > AR5K_TUNE_MAX_TXPOWER) |
| tx_power = AR5K_TUNE_MAX_TXPOWER; |
| |
| /* Clear descriptor status area */ |
| memset(&desc->ud.ds_tx5212.tx_stat, 0, |
| sizeof(desc->ud.ds_tx5212.tx_stat)); |
| |
| /* Setup control descriptor */ |
| |
| /* Verify and set frame length */ |
| |
| /* remove padding we might have added before */ |
| frame_len = pkt_len - padsize + FCS_LEN; |
| |
| if (frame_len & ~AR5K_4W_TX_DESC_CTL0_FRAME_LEN) |
| return -EINVAL; |
| |
| txctl0 = frame_len & AR5K_4W_TX_DESC_CTL0_FRAME_LEN; |
| |
| /* Verify and set buffer length */ |
| |
| /* NB: beacon's BufLen must be a multiple of 4 bytes */ |
| if (type == AR5K_PKT_TYPE_BEACON) |
| pkt_len = roundup(pkt_len, 4); |
| |
| if (pkt_len & ~AR5K_4W_TX_DESC_CTL1_BUF_LEN) |
| return -EINVAL; |
| |
| txctl1 = pkt_len & AR5K_4W_TX_DESC_CTL1_BUF_LEN; |
| |
| txctl0 |= AR5K_REG_SM(tx_power, AR5K_4W_TX_DESC_CTL0_XMIT_POWER) | |
| AR5K_REG_SM(antenna_mode, AR5K_4W_TX_DESC_CTL0_ANT_MODE_XMIT); |
| txctl1 |= AR5K_REG_SM(type, AR5K_4W_TX_DESC_CTL1_FRAME_TYPE); |
| txctl2 = AR5K_REG_SM(tx_tries0, AR5K_4W_TX_DESC_CTL2_XMIT_TRIES0); |
| txctl3 = tx_rate0 & AR5K_4W_TX_DESC_CTL3_XMIT_RATE0; |
| |
| #define _TX_FLAGS(_c, _flag) \ |
| if (flags & AR5K_TXDESC_##_flag) { \ |
| txctl##_c |= AR5K_4W_TX_DESC_CTL##_c##_##_flag; \ |
| } |
| |
| _TX_FLAGS(0, CLRDMASK); |
| _TX_FLAGS(0, VEOL); |
| _TX_FLAGS(0, INTREQ); |
| _TX_FLAGS(0, RTSENA); |
| _TX_FLAGS(0, CTSENA); |
| _TX_FLAGS(1, NOACK); |
| |
| #undef _TX_FLAGS |
| |
| /* |
| * WEP crap |
| */ |
| if (key_index != AR5K_TXKEYIX_INVALID) { |
| txctl0 |= AR5K_4W_TX_DESC_CTL0_ENCRYPT_KEY_VALID; |
| txctl1 |= AR5K_REG_SM(key_index, |
| AR5K_4W_TX_DESC_CTL1_ENCRYPT_KEY_IDX); |
| } |
| |
| /* |
| * RTS/CTS |
| */ |
| if (flags & (AR5K_TXDESC_RTSENA | AR5K_TXDESC_CTSENA)) { |
| if ((flags & AR5K_TXDESC_RTSENA) && |
| (flags & AR5K_TXDESC_CTSENA)) |
| return -EINVAL; |
| txctl2 |= rtscts_duration & AR5K_4W_TX_DESC_CTL2_RTS_DURATION; |
| txctl3 |= AR5K_REG_SM(rtscts_rate, |
| AR5K_4W_TX_DESC_CTL3_RTS_CTS_RATE); |
| } |
| |
| tx_ctl->tx_control_0 = txctl0; |
| tx_ctl->tx_control_1 = txctl1; |
| tx_ctl->tx_control_2 = txctl2; |
| tx_ctl->tx_control_3 = txctl3; |
| |
| return 0; |
| } |
| |
| /** |
| * ath5k_hw_setup_mrr_tx_desc() - Initialize an MRR tx control descriptor |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @tx_rate1: HW idx for rate used on transmission series 1 |
| * @tx_tries1: Max number of retransmissions for transmission series 1 |
| * @tx_rate2: HW idx for rate used on transmission series 2 |
| * @tx_tries2: Max number of retransmissions for transmission series 2 |
| * @tx_rate3: HW idx for rate used on transmission series 3 |
| * @tx_tries3: Max number of retransmissions for transmission series 3 |
| * |
| * Multi rate retry (MRR) tx control descriptors are available only on AR5212 |
| * MACs, they are part of the normal 4-word tx control descriptor (see above) |
| * but we handle them through a separate function for better abstraction. |
| * |
| * Returns 0 on success or -EINVAL on invalid input |
| */ |
| int |
| ath5k_hw_setup_mrr_tx_desc(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| u_int tx_rate1, u_int tx_tries1, |
| u_int tx_rate2, u_int tx_tries2, |
| u_int tx_rate3, u_int tx_tries3) |
| { |
| struct ath5k_hw_4w_tx_ctl *tx_ctl; |
| |
| /* no mrr support for cards older than 5212 */ |
| if (ah->ah_version < AR5K_AR5212) |
| return 0; |
| |
| /* |
| * Rates can be 0 as long as the retry count is 0 too. |
| * A zero rate and nonzero retry count will put the HW into a mode where |
| * it continuously sends noise on the channel, so it is important to |
| * avoid this. |
| */ |
| if (unlikely((tx_rate1 == 0 && tx_tries1 != 0) || |
| (tx_rate2 == 0 && tx_tries2 != 0) || |
| (tx_rate3 == 0 && tx_tries3 != 0))) { |
| ATH5K_ERR(ah, "zero rate\n"); |
| WARN_ON(1); |
| return -EINVAL; |
| } |
| |
| if (ah->ah_version == AR5K_AR5212) { |
| tx_ctl = &desc->ud.ds_tx5212.tx_ctl; |
| |
| #define _XTX_TRIES(_n) \ |
| if (tx_tries##_n) { \ |
| tx_ctl->tx_control_2 |= \ |
| AR5K_REG_SM(tx_tries##_n, \ |
| AR5K_4W_TX_DESC_CTL2_XMIT_TRIES##_n); \ |
| tx_ctl->tx_control_3 |= \ |
| AR5K_REG_SM(tx_rate##_n, \ |
| AR5K_4W_TX_DESC_CTL3_XMIT_RATE##_n); \ |
| } |
| |
| _XTX_TRIES(1); |
| _XTX_TRIES(2); |
| _XTX_TRIES(3); |
| |
| #undef _XTX_TRIES |
| |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| /***********************\ |
| * TX Status descriptors * |
| \***********************/ |
| |
| /** |
| * ath5k_hw_proc_2word_tx_status() - Process a tx status descriptor on 5210/1 |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @ts: The &struct ath5k_tx_status |
| */ |
| static int |
| ath5k_hw_proc_2word_tx_status(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| struct ath5k_tx_status *ts) |
| { |
| struct ath5k_hw_tx_status *tx_status; |
| |
| tx_status = &desc->ud.ds_tx5210.tx_stat; |
| |
| /* No frame has been send or error */ |
| if (unlikely((tx_status->tx_status_1 & AR5K_DESC_TX_STATUS1_DONE) == 0)) |
| return -EINPROGRESS; |
| |
| /* |
| * Get descriptor status |
| */ |
| ts->ts_tstamp = AR5K_REG_MS(tx_status->tx_status_0, |
| AR5K_DESC_TX_STATUS0_SEND_TIMESTAMP); |
| ts->ts_shortretry = AR5K_REG_MS(tx_status->tx_status_0, |
| AR5K_DESC_TX_STATUS0_SHORT_RETRY_COUNT); |
| ts->ts_final_retry = AR5K_REG_MS(tx_status->tx_status_0, |
| AR5K_DESC_TX_STATUS0_LONG_RETRY_COUNT); |
| /*TODO: ts->ts_virtcol + test*/ |
| ts->ts_seqnum = AR5K_REG_MS(tx_status->tx_status_1, |
| AR5K_DESC_TX_STATUS1_SEQ_NUM); |
| ts->ts_rssi = AR5K_REG_MS(tx_status->tx_status_1, |
| AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH); |
| ts->ts_antenna = 1; |
| ts->ts_status = 0; |
| ts->ts_final_idx = 0; |
| |
| if (!(tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK)) { |
| if (tx_status->tx_status_0 & |
| AR5K_DESC_TX_STATUS0_EXCESSIVE_RETRIES) |
| ts->ts_status |= AR5K_TXERR_XRETRY; |
| |
| if (tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FIFO_UNDERRUN) |
| ts->ts_status |= AR5K_TXERR_FIFO; |
| |
| if (tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FILTERED) |
| ts->ts_status |= AR5K_TXERR_FILT; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ath5k_hw_proc_4word_tx_status() - Process a tx status descriptor on 5212 |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @ts: The &struct ath5k_tx_status |
| */ |
| static int |
| ath5k_hw_proc_4word_tx_status(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| struct ath5k_tx_status *ts) |
| { |
| struct ath5k_hw_tx_status *tx_status; |
| u32 txstat0, txstat1; |
| |
| tx_status = &desc->ud.ds_tx5212.tx_stat; |
| |
| txstat1 = READ_ONCE(tx_status->tx_status_1); |
| |
| /* No frame has been send or error */ |
| if (unlikely(!(txstat1 & AR5K_DESC_TX_STATUS1_DONE))) |
| return -EINPROGRESS; |
| |
| txstat0 = READ_ONCE(tx_status->tx_status_0); |
| |
| /* |
| * Get descriptor status |
| */ |
| ts->ts_tstamp = AR5K_REG_MS(txstat0, |
| AR5K_DESC_TX_STATUS0_SEND_TIMESTAMP); |
| ts->ts_shortretry = AR5K_REG_MS(txstat0, |
| AR5K_DESC_TX_STATUS0_SHORT_RETRY_COUNT); |
| ts->ts_final_retry = AR5K_REG_MS(txstat0, |
| AR5K_DESC_TX_STATUS0_LONG_RETRY_COUNT); |
| ts->ts_seqnum = AR5K_REG_MS(txstat1, |
| AR5K_DESC_TX_STATUS1_SEQ_NUM); |
| ts->ts_rssi = AR5K_REG_MS(txstat1, |
| AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH); |
| ts->ts_antenna = (txstat1 & |
| AR5K_DESC_TX_STATUS1_XMIT_ANTENNA_5212) ? 2 : 1; |
| ts->ts_status = 0; |
| |
| ts->ts_final_idx = AR5K_REG_MS(txstat1, |
| AR5K_DESC_TX_STATUS1_FINAL_TS_IX_5212); |
| |
| /* TX error */ |
| if (!(txstat0 & AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK)) { |
| if (txstat0 & AR5K_DESC_TX_STATUS0_EXCESSIVE_RETRIES) |
| ts->ts_status |= AR5K_TXERR_XRETRY; |
| |
| if (txstat0 & AR5K_DESC_TX_STATUS0_FIFO_UNDERRUN) |
| ts->ts_status |= AR5K_TXERR_FIFO; |
| |
| if (txstat0 & AR5K_DESC_TX_STATUS0_FILTERED) |
| ts->ts_status |= AR5K_TXERR_FILT; |
| } |
| |
| return 0; |
| } |
| |
| |
| /****************\ |
| * RX Descriptors * |
| \****************/ |
| |
| /** |
| * ath5k_hw_setup_rx_desc() - Initialize an rx control descriptor |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @size: RX buffer length in bytes |
| * @flags: One of AR5K_RXDESC_* flags |
| */ |
| int |
| ath5k_hw_setup_rx_desc(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| u32 size, unsigned int flags) |
| { |
| struct ath5k_hw_rx_ctl *rx_ctl; |
| |
| rx_ctl = &desc->ud.ds_rx.rx_ctl; |
| |
| /* |
| * Clear the descriptor |
| * If we don't clean the status descriptor, |
| * while scanning we get too many results, |
| * most of them virtual, after some secs |
| * of scanning system hangs. M.F. |
| */ |
| memset(&desc->ud.ds_rx, 0, sizeof(struct ath5k_hw_all_rx_desc)); |
| |
| if (unlikely(size & ~AR5K_DESC_RX_CTL1_BUF_LEN)) |
| return -EINVAL; |
| |
| /* Setup descriptor */ |
| rx_ctl->rx_control_1 = size & AR5K_DESC_RX_CTL1_BUF_LEN; |
| |
| if (flags & AR5K_RXDESC_INTREQ) |
| rx_ctl->rx_control_1 |= AR5K_DESC_RX_CTL1_INTREQ; |
| |
| return 0; |
| } |
| |
| /** |
| * ath5k_hw_proc_5210_rx_status() - Process the rx status descriptor on 5210/1 |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @rs: The &struct ath5k_rx_status |
| * |
| * Internal function used to process an RX status descriptor |
| * on AR5210/5211 MAC. |
| * |
| * Returns 0 on success or -EINPROGRESS in case we haven't received the who;e |
| * frame yet. |
| */ |
| static int |
| ath5k_hw_proc_5210_rx_status(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| struct ath5k_rx_status *rs) |
| { |
| struct ath5k_hw_rx_status *rx_status; |
| |
| rx_status = &desc->ud.ds_rx.rx_stat; |
| |
| /* No frame received / not ready */ |
| if (unlikely(!(rx_status->rx_status_1 & |
| AR5K_5210_RX_DESC_STATUS1_DONE))) |
| return -EINPROGRESS; |
| |
| memset(rs, 0, sizeof(struct ath5k_rx_status)); |
| |
| /* |
| * Frame receive status |
| */ |
| rs->rs_datalen = rx_status->rx_status_0 & |
| AR5K_5210_RX_DESC_STATUS0_DATA_LEN; |
| rs->rs_rssi = AR5K_REG_MS(rx_status->rx_status_0, |
| AR5K_5210_RX_DESC_STATUS0_RECEIVE_SIGNAL); |
| rs->rs_rate = AR5K_REG_MS(rx_status->rx_status_0, |
| AR5K_5210_RX_DESC_STATUS0_RECEIVE_RATE); |
| rs->rs_more = !!(rx_status->rx_status_0 & |
| AR5K_5210_RX_DESC_STATUS0_MORE); |
| /* TODO: this timestamp is 13 bit, later on we assume 15 bit! |
| * also the HAL code for 5210 says the timestamp is bits [10..22] of the |
| * TSF, and extends the timestamp here to 15 bit. |
| * we need to check on 5210... |
| */ |
| rs->rs_tstamp = AR5K_REG_MS(rx_status->rx_status_1, |
| AR5K_5210_RX_DESC_STATUS1_RECEIVE_TIMESTAMP); |
| |
| if (ah->ah_version == AR5K_AR5211) |
| rs->rs_antenna = AR5K_REG_MS(rx_status->rx_status_0, |
| AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANT_5211); |
| else |
| rs->rs_antenna = (rx_status->rx_status_0 & |
| AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANT_5210) |
| ? 2 : 1; |
| |
| /* |
| * Key table status |
| */ |
| if (rx_status->rx_status_1 & AR5K_5210_RX_DESC_STATUS1_KEY_INDEX_VALID) |
| rs->rs_keyix = AR5K_REG_MS(rx_status->rx_status_1, |
| AR5K_5210_RX_DESC_STATUS1_KEY_INDEX); |
| else |
| rs->rs_keyix = AR5K_RXKEYIX_INVALID; |
| |
| /* |
| * Receive/descriptor errors |
| */ |
| if (!(rx_status->rx_status_1 & |
| AR5K_5210_RX_DESC_STATUS1_FRAME_RECEIVE_OK)) { |
| if (rx_status->rx_status_1 & |
| AR5K_5210_RX_DESC_STATUS1_CRC_ERROR) |
| rs->rs_status |= AR5K_RXERR_CRC; |
| |
| /* only on 5210 */ |
| if ((ah->ah_version == AR5K_AR5210) && |
| (rx_status->rx_status_1 & |
| AR5K_5210_RX_DESC_STATUS1_FIFO_OVERRUN_5210)) |
| rs->rs_status |= AR5K_RXERR_FIFO; |
| |
| if (rx_status->rx_status_1 & |
| AR5K_5210_RX_DESC_STATUS1_PHY_ERROR) { |
| rs->rs_status |= AR5K_RXERR_PHY; |
| rs->rs_phyerr = AR5K_REG_MS(rx_status->rx_status_1, |
| AR5K_5210_RX_DESC_STATUS1_PHY_ERROR); |
| } |
| |
| if (rx_status->rx_status_1 & |
| AR5K_5210_RX_DESC_STATUS1_DECRYPT_CRC_ERROR) |
| rs->rs_status |= AR5K_RXERR_DECRYPT; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ath5k_hw_proc_5212_rx_status() - Process the rx status descriptor on 5212 |
| * @ah: The &struct ath5k_hw |
| * @desc: The &struct ath5k_desc |
| * @rs: The &struct ath5k_rx_status |
| * |
| * Internal function used to process an RX status descriptor |
| * on AR5212 and later MAC. |
| * |
| * Returns 0 on success or -EINPROGRESS in case we haven't received the who;e |
| * frame yet. |
| */ |
| static int |
| ath5k_hw_proc_5212_rx_status(struct ath5k_hw *ah, |
| struct ath5k_desc *desc, |
| struct ath5k_rx_status *rs) |
| { |
| struct ath5k_hw_rx_status *rx_status; |
| u32 rxstat0, rxstat1; |
| |
| rx_status = &desc->ud.ds_rx.rx_stat; |
| rxstat1 = READ_ONCE(rx_status->rx_status_1); |
| |
| /* No frame received / not ready */ |
| if (unlikely(!(rxstat1 & AR5K_5212_RX_DESC_STATUS1_DONE))) |
| return -EINPROGRESS; |
| |
| memset(rs, 0, sizeof(struct ath5k_rx_status)); |
| rxstat0 = READ_ONCE(rx_status->rx_status_0); |
| |
| /* |
| * Frame receive status |
| */ |
| rs->rs_datalen = rxstat0 & AR5K_5212_RX_DESC_STATUS0_DATA_LEN; |
| rs->rs_rssi = AR5K_REG_MS(rxstat0, |
| AR5K_5212_RX_DESC_STATUS0_RECEIVE_SIGNAL); |
| rs->rs_rate = AR5K_REG_MS(rxstat0, |
| AR5K_5212_RX_DESC_STATUS0_RECEIVE_RATE); |
| rs->rs_antenna = AR5K_REG_MS(rxstat0, |
| AR5K_5212_RX_DESC_STATUS0_RECEIVE_ANTENNA); |
| rs->rs_more = !!(rxstat0 & AR5K_5212_RX_DESC_STATUS0_MORE); |
| rs->rs_tstamp = AR5K_REG_MS(rxstat1, |
| AR5K_5212_RX_DESC_STATUS1_RECEIVE_TIMESTAMP); |
| |
| /* |
| * Key table status |
| */ |
| if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_KEY_INDEX_VALID) |
| rs->rs_keyix = AR5K_REG_MS(rxstat1, |
| AR5K_5212_RX_DESC_STATUS1_KEY_INDEX); |
| else |
| rs->rs_keyix = AR5K_RXKEYIX_INVALID; |
| |
| /* |
| * Receive/descriptor errors |
| */ |
| if (!(rxstat1 & AR5K_5212_RX_DESC_STATUS1_FRAME_RECEIVE_OK)) { |
| if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_CRC_ERROR) |
| rs->rs_status |= AR5K_RXERR_CRC; |
| |
| if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_PHY_ERROR) { |
| rs->rs_status |= AR5K_RXERR_PHY; |
| rs->rs_phyerr = AR5K_REG_MS(rxstat1, |
| AR5K_5212_RX_DESC_STATUS1_PHY_ERROR_CODE); |
| if (!ah->ah_capabilities.cap_has_phyerr_counters) |
| ath5k_ani_phy_error_report(ah, rs->rs_phyerr); |
| } |
| |
| if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_DECRYPT_CRC_ERROR) |
| rs->rs_status |= AR5K_RXERR_DECRYPT; |
| |
| if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_MIC_ERROR) |
| rs->rs_status |= AR5K_RXERR_MIC; |
| } |
| return 0; |
| } |
| |
| |
| /********\ |
| * Attach * |
| \********/ |
| |
| /** |
| * ath5k_hw_init_desc_functions() - Init function pointers inside ah |
| * @ah: The &struct ath5k_hw |
| * |
| * Maps the internal descriptor functions to the function pointers on ah, used |
| * from above. This is used as an abstraction layer to handle the various chips |
| * the same way. |
| */ |
| int |
| ath5k_hw_init_desc_functions(struct ath5k_hw *ah) |
| { |
| if (ah->ah_version == AR5K_AR5212) { |
| ah->ah_setup_tx_desc = ath5k_hw_setup_4word_tx_desc; |
| ah->ah_proc_tx_desc = ath5k_hw_proc_4word_tx_status; |
| ah->ah_proc_rx_desc = ath5k_hw_proc_5212_rx_status; |
| } else if (ah->ah_version <= AR5K_AR5211) { |
| ah->ah_setup_tx_desc = ath5k_hw_setup_2word_tx_desc; |
| ah->ah_proc_tx_desc = ath5k_hw_proc_2word_tx_status; |
| ah->ah_proc_rx_desc = ath5k_hw_proc_5210_rx_status; |
| } else |
| return -ENOTSUPP; |
| return 0; |
| } |
