--- /dev/null
+/*
+ * 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 <linux/sched.h>
+
+#include "wlcore.h"
+#include "debug.h"
+#include "acx.h"
+#include "rx.h"
+#include "tx.h"
+#include "io.h"
+#include "hw_ops.h"
+
+/*
+ * TODO: this is here just for now, it must be removed when the data
+ * operations are in place.
+ */
+#include "../wl12xx/reg.h"
+
+static u32 wlcore_rx_get_buf_size(struct wl1271 *wl,
+ u32 rx_pkt_desc)
+{
+ if (wl->quirks & WLCORE_QUIRK_RX_BLOCKSIZE_ALIGN)
+ return (rx_pkt_desc & ALIGNED_RX_BUF_SIZE_MASK) >>
+ ALIGNED_RX_BUF_SIZE_SHIFT;
+
+ return (rx_pkt_desc & RX_BUF_SIZE_MASK) >> RX_BUF_SIZE_SHIFT_DIV;
+}
+
+static u32 wlcore_rx_get_align_buf_size(struct wl1271 *wl, u32 pkt_len)
+{
+ if (wl->quirks & WLCORE_QUIRK_RX_BLOCKSIZE_ALIGN)
+ return ALIGN(pkt_len, WL12XX_BUS_BLOCK_SIZE);
+
+ return pkt_len;
+}
+
+static void wl1271_rx_status(struct wl1271 *wl,
+ struct wl1271_rx_descriptor *desc,
+ struct ieee80211_rx_status *status,
+ u8 beacon)
+{
+ memset(status, 0, sizeof(struct ieee80211_rx_status));
+
+ if ((desc->flags & WL1271_RX_DESC_BAND_MASK) == WL1271_RX_DESC_BAND_BG)
+ status->band = IEEE80211_BAND_2GHZ;
+ else
+ status->band = IEEE80211_BAND_5GHZ;
+
+ status->rate_idx = wlcore_rate_to_idx(wl, desc->rate, status->band);
+
+ /* 11n support */
+ if (desc->rate <= wl->hw_min_ht_rate)
+ status->flag |= RX_FLAG_HT;
+
+ 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,
+ status->band);
+
+ if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) {
+ u8 desc_err_code = desc->status & WL1271_RX_DESC_STATUS_MASK;
+
+ status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED |
+ RX_FLAG_DECRYPTED;
+
+ if (unlikely(desc_err_code & WL1271_RX_DESC_MIC_FAIL)) {
+ status->flag |= RX_FLAG_MMIC_ERROR;
+ wl1271_warning("Michael MIC error. Desc: 0x%x",
+ desc_err_code);
+ }
+ }
+
+ if (beacon)
+ wlcore_set_pending_regdomain_ch(wl, (u16)desc->channel,
+ status->band);
+}
+
+static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length,
+ enum wl_rx_buf_align rx_align, u8 *hlid)
+{
+ struct wl1271_rx_descriptor *desc;
+ struct sk_buff *skb;
+ struct ieee80211_hdr *hdr;
+ u8 *buf;
+ u8 beacon = 0;
+ u8 is_data = 0;
+ u8 reserved = 0, offset_to_data = 0;
+ u16 seq_num;
+ u32 pkt_data_len;
+
+ /*
+ * In PLT mode we seem to get frames and mac80211 warns about them,
+ * workaround this by not retrieving them at all.
+ */
+ if (unlikely(wl->plt))
+ return -EINVAL;
+
+ pkt_data_len = wlcore_hw_get_rx_packet_len(wl, data, length);
+ if (!pkt_data_len) {
+ wl1271_error("Invalid packet arrived from HW. length %d",
+ length);
+ return -EINVAL;
+ }
+
+ if (rx_align == WLCORE_RX_BUF_UNALIGNED)
+ reserved = RX_BUF_ALIGN;
+ else if (rx_align == WLCORE_RX_BUF_PADDED)
+ offset_to_data = RX_BUF_ALIGN;
+
+ /* the data read starts with the descriptor */
+ desc = (struct wl1271_rx_descriptor *) data;
+
+ if (desc->packet_class == WL12XX_RX_CLASS_LOGGER) {
+ size_t len = length - sizeof(*desc);
+ wl12xx_copy_fwlog(wl, data + sizeof(*desc), len);
+ wake_up_interruptible(&wl->fwlog_waitq);
+ return 0;
+ }
+
+ /* discard corrupted packets */
+ if (desc->status & WL1271_RX_DESC_DECRYPT_FAIL) {
+ hdr = (void *)(data + sizeof(*desc) + offset_to_data);
+ wl1271_warning("corrupted packet in RX: status: 0x%x len: %d",
+ desc->status & WL1271_RX_DESC_STATUS_MASK,
+ pkt_data_len);
+ wl1271_dump((DEBUG_RX|DEBUG_CMD), "PKT: ", data + sizeof(*desc),
+ min(pkt_data_len,
+ ieee80211_hdrlen(hdr->frame_control)));
+ return -EINVAL;
+ }
+
+ /* skb length not including rx descriptor */
+ skb = __dev_alloc_skb(pkt_data_len + reserved, GFP_KERNEL);
+ if (!skb) {
+ wl1271_error("Couldn't allocate RX frame");
+ return -ENOMEM;
+ }
+
+ /* reserve the unaligned payload(if any) */
+ skb_reserve(skb, reserved);
+
+ buf = skb_put(skb, pkt_data_len);
+
+ /*
+ * Copy packets from aggregation buffer to the skbs without rx
+ * descriptor and with packet payload aligned care. In case of unaligned
+ * packets copy the packets in offset of 2 bytes guarantee IP header
+ * payload aligned to 4 bytes.
+ */
+ memcpy(buf, data + sizeof(*desc), pkt_data_len);
+ if (rx_align == WLCORE_RX_BUF_PADDED)
+ skb_pull(skb, RX_BUF_ALIGN);
+
+ *hlid = desc->hlid;
+
+ hdr = (struct ieee80211_hdr *)skb->data;
+ if (ieee80211_is_beacon(hdr->frame_control))
+ beacon = 1;
+ if (ieee80211_is_data_present(hdr->frame_control))
+ is_data = 1;
+
+ wl1271_rx_status(wl, desc, IEEE80211_SKB_RXCB(skb), beacon);
+ wlcore_hw_set_rx_csum(wl, desc, skb);
+
+ seq_num = (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4;
+ wl1271_debug(DEBUG_RX, "rx skb 0x%p: %d B %s seq %d hlid %d", skb,
+ skb->len - desc->pad_len,
+ beacon ? "beacon" : "",
+ seq_num, *hlid);
+
+ skb_queue_tail(&wl->deferred_rx_queue, skb);
+ queue_work(wl->freezable_wq, &wl->netstack_work);
+
+ return is_data;
+}
+
+int wlcore_rx(struct wl1271 *wl, struct wl_fw_status *status)
+{
+ unsigned long active_hlids[BITS_TO_LONGS(WLCORE_MAX_LINKS)] = {0};
+ u32 buf_size;
+ u32 fw_rx_counter = status->fw_rx_counter % wl->num_rx_desc;
+ u32 drv_rx_counter = wl->rx_counter % wl->num_rx_desc;
+ u32 rx_counter;
+ u32 pkt_len, align_pkt_len;
+ u32 pkt_offset, des;
+ u8 hlid;
+ enum wl_rx_buf_align rx_align;
+ int ret = 0;
+
+ while (drv_rx_counter != fw_rx_counter) {
+ buf_size = 0;
+ rx_counter = drv_rx_counter;
+ while (rx_counter != fw_rx_counter) {
+ des = le32_to_cpu(status->rx_pkt_descs[rx_counter]);
+ pkt_len = wlcore_rx_get_buf_size(wl, des);
+ align_pkt_len = wlcore_rx_get_align_buf_size(wl,
+ pkt_len);
+ if (buf_size + align_pkt_len > wl->aggr_buf_size)
+ break;
+ buf_size += align_pkt_len;
+ rx_counter++;
+ rx_counter %= wl->num_rx_desc;
+ }
+
+ if (buf_size == 0) {
+ wl1271_warning("received empty data");
+ break;
+ }
+
+ /* Read all available packets at once */
+ des = le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]);
+ ret = wlcore_hw_prepare_read(wl, des, buf_size);
+ if (ret < 0)
+ goto out;
+
+ ret = wlcore_read_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
+ buf_size, true);
+ if (ret < 0)
+ goto out;
+
+ /* Split data into separate packets */
+ pkt_offset = 0;
+ while (pkt_offset < buf_size) {
+ des = le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]);
+ pkt_len = wlcore_rx_get_buf_size(wl, des);
+ rx_align = wlcore_hw_get_rx_buf_align(wl, des);
+
+ /*
+ * the handle data call can only fail in memory-outage
+ * conditions, in that case the received frame will just
+ * be dropped.
+ */
+ if (wl1271_rx_handle_data(wl,
+ wl->aggr_buf + pkt_offset,
+ pkt_len, rx_align,
+ &hlid) == 1) {
+ if (hlid < wl->num_links)
+ __set_bit(hlid, active_hlids);
+ else
+ WARN(1,
+ "hlid (%d) exceeded MAX_LINKS\n",
+ hlid);
+ }
+
+ wl->rx_counter++;
+ drv_rx_counter++;
+ drv_rx_counter %= wl->num_rx_desc;
+ pkt_offset += wlcore_rx_get_align_buf_size(wl, pkt_len);
+ }
+ }
+
+ /*
+ * Write the driver's packet counter to the FW. This is only required
+ * for older hardware revisions
+ */
+ if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
+ ret = wlcore_write32(wl, WL12XX_REG_RX_DRIVER_COUNTER,
+ wl->rx_counter);
+ if (ret < 0)
+ goto out;
+ }
+
+ wl12xx_rearm_rx_streaming(wl, active_hlids);
+
+out:
+ return ret;
+}
+
+#ifdef CONFIG_PM
+int wl1271_rx_filter_enable(struct wl1271 *wl,
+ int index, bool enable,
+ struct wl12xx_rx_filter *filter)
+{
+ int ret;
+
+ if (!!test_bit(index, wl->rx_filter_enabled) == enable) {
+ wl1271_warning("Request to enable an already "
+ "enabled rx filter %d", index);
+ return 0;
+ }
+
+ ret = wl1271_acx_set_rx_filter(wl, index, enable, filter);
+
+ if (ret) {
+ wl1271_error("Failed to %s rx data filter %d (err=%d)",
+ enable ? "enable" : "disable", index, ret);
+ return ret;
+ }
+
+ if (enable)
+ __set_bit(index, wl->rx_filter_enabled);
+ else
+ __clear_bit(index, wl->rx_filter_enabled);
+
+ return 0;
+}
+
+int wl1271_rx_filter_clear_all(struct wl1271 *wl)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < WL1271_MAX_RX_FILTERS; i++) {
+ if (!test_bit(i, wl->rx_filter_enabled))
+ continue;
+ ret = wl1271_rx_filter_enable(wl, i, 0, NULL);
+ if (ret)
+ goto out;
+ }
+
+out:
+ return ret;
+}
+#endif /* CONFIG_PM */
Code Review / kvmfornfv.git / blobdiff