diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/rx.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/rx.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/drivers/net/wireless/wl12xx/rx.c b/drivers/net/wireless/wl12xx/rx.c deleted file mode 100644 index 682304c30b8..00000000000 --- a/drivers/net/wireless/wl12xx/rx.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * This file is part of wl1271 - * - * Copyright (C) 2009 Nokia Corporation - * - * Contact: Luciano Coelho <luciano.coelho@nokia.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/gfp.h> - -#include "wl12xx.h" -#include "acx.h" -#include "reg.h" -#include "rx.h" -#include "io.h" - -static u8 wl1271_rx_get_mem_block(struct wl1271_fw_status *status, - u32 drv_rx_counter) -{ - return le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]) & - RX_MEM_BLOCK_MASK; -} - -static u32 wl1271_rx_get_buf_size(struct wl1271_fw_status *status, - u32 drv_rx_counter) -{ - return (le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]) & - RX_BUF_SIZE_MASK) >> RX_BUF_SIZE_SHIFT_DIV; -} - -static void wl1271_rx_status(struct wl1271 *wl, - struct wl1271_rx_descriptor *desc, - struct ieee80211_rx_status *status, - u8 beacon) -{ - enum ieee80211_band desc_band; - - memset(status, 0, sizeof(struct ieee80211_rx_status)); - - status->band = wl->band; - - if ((desc->flags & WL1271_RX_DESC_BAND_MASK) == WL1271_RX_DESC_BAND_BG) - desc_band = IEEE80211_BAND_2GHZ; - else - desc_band = IEEE80211_BAND_5GHZ; - - status->rate_idx = wl1271_rate_to_idx(desc->rate, desc_band); - -#ifdef CONFIG_WL12XX_HT - /* 11n support */ - if (desc->rate <= CONF_HW_RXTX_RATE_MCS0) - status->flag |= RX_FLAG_HT; -#endif - - status->signal = desc->rssi; - - /* - * FIXME: In wl1251, the SNR should be divided by two. In wl1271 we - * need to divide by two for now, but TI has been discussing about - * changing it. This needs to be rechecked. - */ - wl->noise = desc->rssi - (desc->snr >> 1); - - status->freq = ieee80211_channel_to_frequency(desc->channel); - - if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) { - status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED; - - if (likely(!(desc->status & WL1271_RX_DESC_DECRYPT_FAIL))) - status->flag |= RX_FLAG_DECRYPTED; - if (unlikely(desc->status & WL1271_RX_DESC_MIC_FAIL)) - status->flag |= RX_FLAG_MMIC_ERROR; - } -} - -static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length) -{ - struct wl1271_rx_descriptor *desc; - struct sk_buff *skb; - u16 *fc; - u8 *buf; - u8 beacon = 0; - - /* - * In PLT mode we seem to get frames and mac80211 warns about them, - * workaround this by not retrieving them at all. - */ - if (unlikely(wl->state == WL1271_STATE_PLT)) - return -EINVAL; - - skb = __dev_alloc_skb(length, GFP_KERNEL); - if (!skb) { - wl1271_error("Couldn't allocate RX frame"); - return -ENOMEM; - } - - buf = skb_put(skb, length); - memcpy(buf, data, length); - - /* the data read starts with the descriptor */ - desc = (struct wl1271_rx_descriptor *) buf; - - /* now we pull the descriptor out of the buffer */ - skb_pull(skb, sizeof(*desc)); - - fc = (u16 *)skb->data; - if ((*fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) - beacon = 1; - - wl1271_rx_status(wl, desc, IEEE80211_SKB_RXCB(skb), beacon); - - wl1271_debug(DEBUG_RX, "rx skb 0x%p: %d B %s", skb, skb->len, - beacon ? "beacon" : ""); - - skb_trim(skb, skb->len - desc->pad_len); - - ieee80211_rx_ni(wl->hw, skb); - - return 0; -} - -void wl1271_rx(struct wl1271 *wl, struct wl1271_fw_status *status) -{ - struct wl1271_acx_mem_map *wl_mem_map = wl->target_mem_map; - u32 buf_size; - u32 fw_rx_counter = status->fw_rx_counter & NUM_RX_PKT_DESC_MOD_MASK; - u32 drv_rx_counter = wl->rx_counter & NUM_RX_PKT_DESC_MOD_MASK; - u32 rx_counter; - u32 mem_block; - u32 pkt_length; - u32 pkt_offset; - - while (drv_rx_counter != fw_rx_counter) { - buf_size = 0; - rx_counter = drv_rx_counter; - while (rx_counter != fw_rx_counter) { - pkt_length = wl1271_rx_get_buf_size(status, rx_counter); - if (buf_size + pkt_length > WL1271_AGGR_BUFFER_SIZE) - break; - buf_size += pkt_length; - rx_counter++; - rx_counter &= NUM_RX_PKT_DESC_MOD_MASK; - } - - if (buf_size == 0) { - wl1271_warning("received empty data"); - break; - } - - /* - * Choose the block we want to read - * For aggregated packets, only the first memory block should - * be retrieved. The FW takes care of the rest. - */ - mem_block = wl1271_rx_get_mem_block(status, drv_rx_counter); - wl->rx_mem_pool_addr.addr = (mem_block << 8) + - le32_to_cpu(wl_mem_map->packet_memory_pool_start); - wl->rx_mem_pool_addr.addr_extra = - wl->rx_mem_pool_addr.addr + 4; - wl1271_write(wl, WL1271_SLV_REG_DATA, &wl->rx_mem_pool_addr, - sizeof(wl->rx_mem_pool_addr), false); - - /* Read all available packets at once */ - wl1271_read(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, - buf_size, true); - - /* Split data into separate packets */ - pkt_offset = 0; - while (pkt_offset < buf_size) { - pkt_length = wl1271_rx_get_buf_size(status, - drv_rx_counter); - /* - * the handle data call can only fail in memory-outage - * conditions, in that case the received frame will just - * be dropped. - */ - wl1271_rx_handle_data(wl, - wl->aggr_buf + pkt_offset, - pkt_length); - wl->rx_counter++; - drv_rx_counter++; - drv_rx_counter &= NUM_RX_PKT_DESC_MOD_MASK; - pkt_offset += pkt_length; - } - } - wl1271_write32(wl, RX_DRIVER_COUNTER_ADDRESS, - cpu_to_le32(wl->rx_counter)); -} |