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342 lines
8.8 KiB
342 lines
8.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* This file is part of wl1271 |
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* |
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* Copyright (C) 2009 Nokia Corporation |
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* |
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* Contact: Luciano Coelho <[email protected]> |
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*/ |
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#include <linux/gfp.h> |
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#include <linux/sched.h> |
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#include "wlcore.h" |
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#include "debug.h" |
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#include "acx.h" |
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#include "rx.h" |
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#include "tx.h" |
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#include "io.h" |
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#include "hw_ops.h" |
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/* |
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* TODO: this is here just for now, it must be removed when the data |
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* operations are in place. |
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*/ |
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#include "../wl12xx/reg.h" |
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static u32 wlcore_rx_get_buf_size(struct wl1271 *wl, |
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u32 rx_pkt_desc) |
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{ |
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if (wl->quirks & WLCORE_QUIRK_RX_BLOCKSIZE_ALIGN) |
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return (rx_pkt_desc & ALIGNED_RX_BUF_SIZE_MASK) >> |
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ALIGNED_RX_BUF_SIZE_SHIFT; |
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return (rx_pkt_desc & RX_BUF_SIZE_MASK) >> RX_BUF_SIZE_SHIFT_DIV; |
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} |
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static u32 wlcore_rx_get_align_buf_size(struct wl1271 *wl, u32 pkt_len) |
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{ |
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if (wl->quirks & WLCORE_QUIRK_RX_BLOCKSIZE_ALIGN) |
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return ALIGN(pkt_len, WL12XX_BUS_BLOCK_SIZE); |
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return pkt_len; |
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} |
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static void wl1271_rx_status(struct wl1271 *wl, |
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struct wl1271_rx_descriptor *desc, |
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struct ieee80211_rx_status *status, |
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u8 beacon, u8 probe_rsp) |
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{ |
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memset(status, 0, sizeof(struct ieee80211_rx_status)); |
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if ((desc->flags & WL1271_RX_DESC_BAND_MASK) == WL1271_RX_DESC_BAND_BG) |
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status->band = NL80211_BAND_2GHZ; |
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else |
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status->band = NL80211_BAND_5GHZ; |
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status->rate_idx = wlcore_rate_to_idx(wl, desc->rate, status->band); |
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/* 11n support */ |
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if (desc->rate <= wl->hw_min_ht_rate) |
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status->encoding = RX_ENC_HT; |
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/* |
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* Read the signal level and antenna diversity indication. |
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* The msb in the signal level is always set as it is a |
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* negative number. |
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* The antenna indication is the msb of the rssi. |
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*/ |
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status->signal = ((desc->rssi & RSSI_LEVEL_BITMASK) | BIT(7)); |
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status->antenna = ((desc->rssi & ANT_DIVERSITY_BITMASK) >> 7); |
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/* |
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* FIXME: In wl1251, the SNR should be divided by two. In wl1271 we |
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* need to divide by two for now, but TI has been discussing about |
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* changing it. This needs to be rechecked. |
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*/ |
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wl->noise = desc->rssi - (desc->snr >> 1); |
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status->freq = ieee80211_channel_to_frequency(desc->channel, |
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status->band); |
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if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) { |
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u8 desc_err_code = desc->status & WL1271_RX_DESC_STATUS_MASK; |
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status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED | |
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RX_FLAG_DECRYPTED; |
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if (unlikely(desc_err_code & WL1271_RX_DESC_MIC_FAIL)) { |
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status->flag |= RX_FLAG_MMIC_ERROR; |
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wl1271_warning("Michael MIC error. Desc: 0x%x", |
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desc_err_code); |
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} |
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} |
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if (beacon || probe_rsp) |
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status->boottime_ns = ktime_get_boottime_ns(); |
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if (beacon) |
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wlcore_set_pending_regdomain_ch(wl, (u16)desc->channel, |
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status->band); |
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} |
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static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length, |
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enum wl_rx_buf_align rx_align, u8 *hlid) |
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{ |
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struct wl1271_rx_descriptor *desc; |
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struct sk_buff *skb; |
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struct ieee80211_hdr *hdr; |
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u8 beacon = 0; |
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u8 is_data = 0; |
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u8 reserved = 0, offset_to_data = 0; |
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u16 seq_num; |
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u32 pkt_data_len; |
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/* |
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* In PLT mode we seem to get frames and mac80211 warns about them, |
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* workaround this by not retrieving them at all. |
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*/ |
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if (unlikely(wl->plt)) |
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return -EINVAL; |
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pkt_data_len = wlcore_hw_get_rx_packet_len(wl, data, length); |
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if (!pkt_data_len) { |
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wl1271_error("Invalid packet arrived from HW. length %d", |
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length); |
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return -EINVAL; |
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} |
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if (rx_align == WLCORE_RX_BUF_UNALIGNED) |
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reserved = RX_BUF_ALIGN; |
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else if (rx_align == WLCORE_RX_BUF_PADDED) |
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offset_to_data = RX_BUF_ALIGN; |
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/* the data read starts with the descriptor */ |
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desc = (struct wl1271_rx_descriptor *) data; |
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if (desc->packet_class == WL12XX_RX_CLASS_LOGGER) { |
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size_t len = length - sizeof(*desc); |
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wl12xx_copy_fwlog(wl, data + sizeof(*desc), len); |
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return 0; |
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} |
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/* discard corrupted packets */ |
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if (desc->status & WL1271_RX_DESC_DECRYPT_FAIL) { |
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hdr = (void *)(data + sizeof(*desc) + offset_to_data); |
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wl1271_warning("corrupted packet in RX: status: 0x%x len: %d", |
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desc->status & WL1271_RX_DESC_STATUS_MASK, |
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pkt_data_len); |
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wl1271_dump((DEBUG_RX|DEBUG_CMD), "PKT: ", data + sizeof(*desc), |
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min(pkt_data_len, |
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ieee80211_hdrlen(hdr->frame_control))); |
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return -EINVAL; |
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} |
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/* skb length not including rx descriptor */ |
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skb = __dev_alloc_skb(pkt_data_len + reserved, GFP_KERNEL); |
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if (!skb) { |
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wl1271_error("Couldn't allocate RX frame"); |
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return -ENOMEM; |
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} |
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/* reserve the unaligned payload(if any) */ |
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skb_reserve(skb, reserved); |
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/* |
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* Copy packets from aggregation buffer to the skbs without rx |
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* descriptor and with packet payload aligned care. In case of unaligned |
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* packets copy the packets in offset of 2 bytes guarantee IP header |
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* payload aligned to 4 bytes. |
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*/ |
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skb_put_data(skb, data + sizeof(*desc), pkt_data_len); |
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if (rx_align == WLCORE_RX_BUF_PADDED) |
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skb_pull(skb, RX_BUF_ALIGN); |
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*hlid = desc->hlid; |
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hdr = (struct ieee80211_hdr *)skb->data; |
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if (ieee80211_is_beacon(hdr->frame_control)) |
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beacon = 1; |
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if (ieee80211_is_data_present(hdr->frame_control)) |
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is_data = 1; |
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wl1271_rx_status(wl, desc, IEEE80211_SKB_RXCB(skb), beacon, |
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ieee80211_is_probe_resp(hdr->frame_control)); |
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wlcore_hw_set_rx_csum(wl, desc, skb); |
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seq_num = (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4; |
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wl1271_debug(DEBUG_RX, "rx skb 0x%p: %d B %s seq %d hlid %d", skb, |
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skb->len - desc->pad_len, |
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beacon ? "beacon" : "", |
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seq_num, *hlid); |
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skb_queue_tail(&wl->deferred_rx_queue, skb); |
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queue_work(wl->freezable_wq, &wl->netstack_work); |
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return is_data; |
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} |
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int wlcore_rx(struct wl1271 *wl, struct wl_fw_status *status) |
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{ |
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unsigned long active_hlids[BITS_TO_LONGS(WLCORE_MAX_LINKS)] = {0}; |
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u32 buf_size; |
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u32 fw_rx_counter = status->fw_rx_counter % wl->num_rx_desc; |
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u32 drv_rx_counter = wl->rx_counter % wl->num_rx_desc; |
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u32 rx_counter; |
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u32 pkt_len, align_pkt_len; |
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u32 pkt_offset, des; |
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u8 hlid; |
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enum wl_rx_buf_align rx_align; |
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int ret = 0; |
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/* update rates per link */ |
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hlid = status->counters.hlid; |
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if (hlid < WLCORE_MAX_LINKS) |
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wl->links[hlid].fw_rate_mbps = |
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status->counters.tx_last_rate_mbps; |
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while (drv_rx_counter != fw_rx_counter) { |
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buf_size = 0; |
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rx_counter = drv_rx_counter; |
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while (rx_counter != fw_rx_counter) { |
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des = le32_to_cpu(status->rx_pkt_descs[rx_counter]); |
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pkt_len = wlcore_rx_get_buf_size(wl, des); |
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align_pkt_len = wlcore_rx_get_align_buf_size(wl, |
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pkt_len); |
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if (buf_size + align_pkt_len > wl->aggr_buf_size) |
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break; |
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buf_size += align_pkt_len; |
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rx_counter++; |
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rx_counter %= wl->num_rx_desc; |
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} |
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if (buf_size == 0) { |
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wl1271_warning("received empty data"); |
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break; |
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} |
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/* Read all available packets at once */ |
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des = le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]); |
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ret = wlcore_hw_prepare_read(wl, des, buf_size); |
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if (ret < 0) |
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goto out; |
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ret = wlcore_read_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf, |
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buf_size, true); |
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if (ret < 0) |
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goto out; |
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/* Split data into separate packets */ |
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pkt_offset = 0; |
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while (pkt_offset < buf_size) { |
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des = le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]); |
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pkt_len = wlcore_rx_get_buf_size(wl, des); |
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rx_align = wlcore_hw_get_rx_buf_align(wl, des); |
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/* |
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* the handle data call can only fail in memory-outage |
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* conditions, in that case the received frame will just |
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* be dropped. |
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*/ |
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if (wl1271_rx_handle_data(wl, |
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wl->aggr_buf + pkt_offset, |
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pkt_len, rx_align, |
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&hlid) == 1) { |
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if (hlid < wl->num_links) |
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__set_bit(hlid, active_hlids); |
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else |
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WARN(1, |
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"hlid (%d) exceeded MAX_LINKS\n", |
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hlid); |
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} |
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wl->rx_counter++; |
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drv_rx_counter++; |
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drv_rx_counter %= wl->num_rx_desc; |
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pkt_offset += wlcore_rx_get_align_buf_size(wl, pkt_len); |
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} |
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} |
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/* |
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* Write the driver's packet counter to the FW. This is only required |
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* for older hardware revisions |
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*/ |
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if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) { |
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ret = wlcore_write32(wl, WL12XX_REG_RX_DRIVER_COUNTER, |
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wl->rx_counter); |
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if (ret < 0) |
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goto out; |
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} |
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wl12xx_rearm_rx_streaming(wl, active_hlids); |
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out: |
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return ret; |
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} |
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#ifdef CONFIG_PM |
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int wl1271_rx_filter_enable(struct wl1271 *wl, |
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int index, bool enable, |
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struct wl12xx_rx_filter *filter) |
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{ |
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int ret; |
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if (!!test_bit(index, wl->rx_filter_enabled) == enable) { |
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wl1271_warning("Request to enable an already " |
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"enabled rx filter %d", index); |
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return 0; |
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} |
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ret = wl1271_acx_set_rx_filter(wl, index, enable, filter); |
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if (ret) { |
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wl1271_error("Failed to %s rx data filter %d (err=%d)", |
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enable ? "enable" : "disable", index, ret); |
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return ret; |
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} |
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if (enable) |
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__set_bit(index, wl->rx_filter_enabled); |
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else |
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__clear_bit(index, wl->rx_filter_enabled); |
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return 0; |
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} |
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int wl1271_rx_filter_clear_all(struct wl1271 *wl) |
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{ |
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int i, ret = 0; |
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for (i = 0; i < WL1271_MAX_RX_FILTERS; i++) { |
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if (!test_bit(i, wl->rx_filter_enabled)) |
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continue; |
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ret = wl1271_rx_filter_enable(wl, i, 0, NULL); |
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if (ret) |
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goto out; |
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} |
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out: |
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return ret; |
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} |
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#endif /* CONFIG_PM */
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