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authorDavid S. Miller <davem@davemloft.net>2013-06-24 00:31:02 -0700
committerDavid S. Miller <davem@davemloft.net>2013-06-24 00:31:02 -0700
commit7e2f934dc52089da5b196714f0c286a8e71396c2 (patch)
treeb224f7f692989dbcc8ea22e87842f845c9ed7b55 /drivers/net/wireless/ath/ath10k/txrx.c
parent07cc61bfc0e5d9da80e353365717d45d29db0081 (diff)
parent7d2a47aab2a511c87a96238977e04e6378969d45 (diff)
Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next
John W. Linville says: ==================== I would guess that this is the last big wireless pull request before the 3.11 merge window... Regarding the mac80211 bits, Johannes says: "I have a number of mesh fixes and improvements from Colleen, Jacob, Ashok and Thomas, powersave fixes in mac80211 from Alex, improved management-TX from Antonio, and a few various things, including locking fixes, from others and myself. Overall though, nothing really stands out." As for the iwlwifi bits, Johannes says: "Emmanuel contributed two AP mode fixes, removed an unused field, fixed a comment and added a warning for something that shouldn't happen in practice, and I removed the declaration of a function that doesn't even exist and cleaned up a small include." "This time I have a number of cleanups, a small fix from Emmanuel and two performance improvements that combined reduce our driver's CPU utilisation as much as 75% in high TX-throughput scenarios." "These two patches fix two issues with using rfkill randomly during traffic, which would then cause our driver to stop working and not be able to recover at all." Regarding the ath6kl bits, Kalle says: "Here are few simple patches for ath6kl. We have a suspend crash fix for USB from Shafi, use of mac_pton(), a compiler warning fix and a fix for module initialisation error path." Kalle also sends the biggest single item of note, the new ath10k driver for Qualcomm Atheros 802.11ac CQA98xx devices. Included is an NFC pull, of which Samuel says: "These are the pending NFC patches for the 3.11 merge window. It contains the pending fixes that were on nfc-fixes (nfc-fixes-3.10-2), along with a few more for the pn544 and pn533 drivers, the LLCP disconnection path and an LLCP memory leak. Highlights for this one are: - An initial secure element API. NFC chipsets can carry an embedded secure element or get access to the SIM one. In both cases they control the secure elements and this API provides a way to discover, enable and disable the available SEs. It also exports that to userspace in order for SE focused middleware to actually do something with them (e.g. payments). - NCI over SPI support. SPI is the most complex NCI specified transport layer and we now have support for it in the kernel. The next step will be to implement drivers for NCI chipsets using this transport like e.g. bcm2079x. - NFC p2p hardware simulation driver. We now have an nfcsim driver that is mostly a loopback device between 2 NFC interfaces. It also implements the rest of the NFC core API like polling and target detection. This driver, with neard running on top of it, allows us to completely test the LLCP, SNEP and Handover implementation without physical hardware. - A Firmware update netlink API. Most (All ?) HCI chipsets have a special firmware update mode where applications can push a new firmware that will be flashed. We now have a netlink API for providing that mode to e.g. nfctool." On top of all that, there are a variety of updates to brcmfmac, iwlegacy, rtlwifi, wil6210, and the TI wl12xx drivers. As usual, the bcma and ssb busses get a little love as well, as do a handful of others here and there. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/txrx.c')
-rw-r--r--drivers/net/wireless/ath/ath10k/txrx.c417
1 files changed, 417 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c
new file mode 100644
index 00000000000..68b6faefd1d
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -0,0 +1,417 @@
+/*
+ * Copyright (c) 2005-2011 Atheros Communications Inc.
+ * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
+ *
+ * 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 "core.h"
+#include "txrx.h"
+#include "htt.h"
+#include "mac.h"
+#include "debug.h"
+
+static void ath10k_report_offchan_tx(struct ath10k *ar, struct sk_buff *skb)
+{
+ if (!ATH10K_SKB_CB(skb)->htt.is_offchan)
+ return;
+
+ /* If the original wait_for_completion() timed out before
+ * {data,mgmt}_tx_completed() was called then we could complete
+ * offchan_tx_completed for a different skb. Prevent this by using
+ * offchan_tx_skb. */
+ spin_lock_bh(&ar->data_lock);
+ if (ar->offchan_tx_skb != skb) {
+ ath10k_warn("completed old offchannel frame\n");
+ goto out;
+ }
+
+ complete(&ar->offchan_tx_completed);
+ ar->offchan_tx_skb = NULL; /* just for sanity */
+
+ ath10k_dbg(ATH10K_DBG_HTT, "completed offchannel skb %p\n", skb);
+out:
+ spin_unlock_bh(&ar->data_lock);
+}
+
+void ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct sk_buff *txdesc)
+{
+ struct device *dev = htt->ar->dev;
+ struct ieee80211_tx_info *info;
+ struct sk_buff *txfrag = ATH10K_SKB_CB(txdesc)->htt.txfrag;
+ struct sk_buff *msdu = ATH10K_SKB_CB(txdesc)->htt.msdu;
+ int ret;
+
+ if (ATH10K_SKB_CB(txdesc)->htt.refcount == 0)
+ return;
+
+ ATH10K_SKB_CB(txdesc)->htt.refcount--;
+
+ if (ATH10K_SKB_CB(txdesc)->htt.refcount > 0)
+ return;
+
+ if (txfrag) {
+ ret = ath10k_skb_unmap(dev, txfrag);
+ if (ret)
+ ath10k_warn("txfrag unmap failed (%d)\n", ret);
+
+ dev_kfree_skb_any(txfrag);
+ }
+
+ ret = ath10k_skb_unmap(dev, msdu);
+ if (ret)
+ ath10k_warn("data skb unmap failed (%d)\n", ret);
+
+ ath10k_report_offchan_tx(htt->ar, msdu);
+
+ info = IEEE80211_SKB_CB(msdu);
+ memset(&info->status, 0, sizeof(info->status));
+
+ if (ATH10K_SKB_CB(txdesc)->htt.discard) {
+ ieee80211_free_txskb(htt->ar->hw, msdu);
+ goto exit;
+ }
+
+ if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
+ info->flags |= IEEE80211_TX_STAT_ACK;
+
+ if (ATH10K_SKB_CB(txdesc)->htt.no_ack)
+ info->flags &= ~IEEE80211_TX_STAT_ACK;
+
+ ieee80211_tx_status(htt->ar->hw, msdu);
+ /* we do not own the msdu anymore */
+
+exit:
+ spin_lock_bh(&htt->tx_lock);
+ htt->pending_tx[ATH10K_SKB_CB(txdesc)->htt.msdu_id] = NULL;
+ ath10k_htt_tx_free_msdu_id(htt, ATH10K_SKB_CB(txdesc)->htt.msdu_id);
+ __ath10k_htt_tx_dec_pending(htt);
+ if (bitmap_empty(htt->used_msdu_ids, htt->max_num_pending_tx))
+ wake_up(&htt->empty_tx_wq);
+ spin_unlock_bh(&htt->tx_lock);
+
+ dev_kfree_skb_any(txdesc);
+}
+
+void ath10k_txrx_tx_completed(struct ath10k_htt *htt,
+ const struct htt_tx_done *tx_done)
+{
+ struct sk_buff *txdesc;
+
+ ath10k_dbg(ATH10K_DBG_HTT, "htt tx completion msdu_id %u discard %d no_ack %d\n",
+ tx_done->msdu_id, !!tx_done->discard, !!tx_done->no_ack);
+
+ if (tx_done->msdu_id >= htt->max_num_pending_tx) {
+ ath10k_warn("warning: msdu_id %d too big, ignoring\n",
+ tx_done->msdu_id);
+ return;
+ }
+
+ txdesc = htt->pending_tx[tx_done->msdu_id];
+
+ ATH10K_SKB_CB(txdesc)->htt.discard = tx_done->discard;
+ ATH10K_SKB_CB(txdesc)->htt.no_ack = tx_done->no_ack;
+
+ ath10k_txrx_tx_unref(htt, txdesc);
+}
+
+static const u8 rx_legacy_rate_idx[] = {
+ 3, /* 0x00 - 11Mbps */
+ 2, /* 0x01 - 5.5Mbps */
+ 1, /* 0x02 - 2Mbps */
+ 0, /* 0x03 - 1Mbps */
+ 3, /* 0x04 - 11Mbps */
+ 2, /* 0x05 - 5.5Mbps */
+ 1, /* 0x06 - 2Mbps */
+ 0, /* 0x07 - 1Mbps */
+ 10, /* 0x08 - 48Mbps */
+ 8, /* 0x09 - 24Mbps */
+ 6, /* 0x0A - 12Mbps */
+ 4, /* 0x0B - 6Mbps */
+ 11, /* 0x0C - 54Mbps */
+ 9, /* 0x0D - 36Mbps */
+ 7, /* 0x0E - 18Mbps */
+ 5, /* 0x0F - 9Mbps */
+};
+
+static void process_rx_rates(struct ath10k *ar, struct htt_rx_info *info,
+ enum ieee80211_band band,
+ struct ieee80211_rx_status *status)
+{
+ u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
+ u8 info0 = info->rate.info0;
+ u32 info1 = info->rate.info1;
+ u32 info2 = info->rate.info2;
+ u8 preamble = 0;
+
+ /* Check if valid fields */
+ if (!(info0 & HTT_RX_INDICATION_INFO0_START_VALID))
+ return;
+
+ preamble = MS(info1, HTT_RX_INDICATION_INFO1_PREAMBLE_TYPE);
+
+ switch (preamble) {
+ case HTT_RX_LEGACY:
+ cck = info0 & HTT_RX_INDICATION_INFO0_LEGACY_RATE_CCK;
+ rate = MS(info0, HTT_RX_INDICATION_INFO0_LEGACY_RATE);
+ rate_idx = 0;
+
+ if (rate < 0x08 || rate > 0x0F)
+ break;
+
+ switch (band) {
+ case IEEE80211_BAND_2GHZ:
+ if (cck)
+ rate &= ~BIT(3);
+ rate_idx = rx_legacy_rate_idx[rate];
+ break;
+ case IEEE80211_BAND_5GHZ:
+ rate_idx = rx_legacy_rate_idx[rate];
+ /* We are using same rate table registering
+ HW - ath10k_rates[]. In case of 5GHz skip
+ CCK rates, so -4 here */
+ rate_idx -= 4;
+ break;
+ default:
+ break;
+ }
+
+ status->rate_idx = rate_idx;
+ break;
+ case HTT_RX_HT:
+ case HTT_RX_HT_WITH_TXBF:
+ /* HT-SIG - Table 20-11 in info1 and info2 */
+ mcs = info1 & 0x1F;
+ nss = mcs >> 3;
+ bw = (info1 >> 7) & 1;
+ sgi = (info2 >> 7) & 1;
+
+ status->rate_idx = mcs;
+ status->flag |= RX_FLAG_HT;
+ if (sgi)
+ status->flag |= RX_FLAG_SHORT_GI;
+ if (bw)
+ status->flag |= RX_FLAG_40MHZ;
+ break;
+ case HTT_RX_VHT:
+ case HTT_RX_VHT_WITH_TXBF:
+ /* VHT-SIG-A1 in info 1, VHT-SIG-A2 in info2
+ TODO check this */
+ mcs = (info2 >> 4) & 0x0F;
+ nss = (info1 >> 10) & 0x07;
+ bw = info1 & 3;
+ sgi = info2 & 1;
+
+ status->rate_idx = mcs;
+ status->vht_nss = nss;
+
+ if (sgi)
+ status->flag |= RX_FLAG_SHORT_GI;
+
+ switch (bw) {
+ /* 20MHZ */
+ case 0:
+ break;
+ /* 40MHZ */
+ case 1:
+ status->flag |= RX_FLAG_40MHZ;
+ break;
+ /* 80MHZ */
+ case 2:
+ status->flag |= RX_FLAG_80MHZ;
+ }
+
+ status->flag |= RX_FLAG_VHT;
+ break;
+ default:
+ break;
+ }
+}
+
+void ath10k_process_rx(struct ath10k *ar, struct htt_rx_info *info)
+{
+ struct ieee80211_rx_status *status;
+ struct ieee80211_channel *ch;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)info->skb->data;
+
+ status = IEEE80211_SKB_RXCB(info->skb);
+ memset(status, 0, sizeof(*status));
+
+ if (info->encrypt_type != HTT_RX_MPDU_ENCRYPT_NONE) {
+ status->flag |= RX_FLAG_DECRYPTED | RX_FLAG_IV_STRIPPED |
+ RX_FLAG_MMIC_STRIPPED;
+ hdr->frame_control = __cpu_to_le16(
+ __le16_to_cpu(hdr->frame_control) &
+ ~IEEE80211_FCTL_PROTECTED);
+ }
+
+ if (info->status == HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR)
+ status->flag |= RX_FLAG_MMIC_ERROR;
+
+ if (info->fcs_err)
+ status->flag |= RX_FLAG_FAILED_FCS_CRC;
+
+ status->signal = info->signal;
+
+ spin_lock_bh(&ar->data_lock);
+ ch = ar->scan_channel;
+ if (!ch)
+ ch = ar->rx_channel;
+ spin_unlock_bh(&ar->data_lock);
+
+ if (!ch) {
+ ath10k_warn("no channel configured; ignoring frame!\n");
+ dev_kfree_skb_any(info->skb);
+ return;
+ }
+
+ process_rx_rates(ar, info, ch->band, status);
+ status->band = ch->band;
+ status->freq = ch->center_freq;
+
+ ath10k_dbg(ATH10K_DBG_DATA,
+ "rx skb %p len %u %s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u\n",
+ info->skb,
+ info->skb->len,
+ status->flag == 0 ? "legacy" : "",
+ status->flag & RX_FLAG_HT ? "ht" : "",
+ status->flag & RX_FLAG_VHT ? "vht" : "",
+ status->flag & RX_FLAG_40MHZ ? "40" : "",
+ status->flag & RX_FLAG_80MHZ ? "80" : "",
+ status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
+ status->rate_idx,
+ status->vht_nss,
+ status->freq,
+ status->band);
+
+ ieee80211_rx(ar->hw, info->skb);
+}
+
+struct ath10k_peer *ath10k_peer_find(struct ath10k *ar, int vdev_id,
+ const u8 *addr)
+{
+ struct ath10k_peer *peer;
+
+ lockdep_assert_held(&ar->data_lock);
+
+ list_for_each_entry(peer, &ar->peers, list) {
+ if (peer->vdev_id != vdev_id)
+ continue;
+ if (memcmp(peer->addr, addr, ETH_ALEN))
+ continue;
+
+ return peer;
+ }
+
+ return NULL;
+}
+
+static struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar,
+ int peer_id)
+{
+ struct ath10k_peer *peer;
+
+ lockdep_assert_held(&ar->data_lock);
+
+ list_for_each_entry(peer, &ar->peers, list)
+ if (test_bit(peer_id, peer->peer_ids))
+ return peer;
+
+ return NULL;
+}
+
+static int ath10k_wait_for_peer_common(struct ath10k *ar, int vdev_id,
+ const u8 *addr, bool expect_mapped)
+{
+ int ret;
+
+ ret = wait_event_timeout(ar->peer_mapping_wq, ({
+ bool mapped;
+
+ spin_lock_bh(&ar->data_lock);
+ mapped = !!ath10k_peer_find(ar, vdev_id, addr);
+ spin_unlock_bh(&ar->data_lock);
+
+ mapped == expect_mapped;
+ }), 3*HZ);
+
+ if (ret <= 0)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+int ath10k_wait_for_peer_created(struct ath10k *ar, int vdev_id, const u8 *addr)
+{
+ return ath10k_wait_for_peer_common(ar, vdev_id, addr, true);
+}
+
+int ath10k_wait_for_peer_deleted(struct ath10k *ar, int vdev_id, const u8 *addr)
+{
+ return ath10k_wait_for_peer_common(ar, vdev_id, addr, false);
+}
+
+void ath10k_peer_map_event(struct ath10k_htt *htt,
+ struct htt_peer_map_event *ev)
+{
+ struct ath10k *ar = htt->ar;
+ struct ath10k_peer *peer;
+
+ spin_lock_bh(&ar->data_lock);
+ peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr);
+ if (!peer) {
+ peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
+ if (!peer)
+ goto exit;
+
+ peer->vdev_id = ev->vdev_id;
+ memcpy(peer->addr, ev->addr, ETH_ALEN);
+ list_add(&peer->list, &ar->peers);
+ wake_up(&ar->peer_mapping_wq);
+ }
+
+ ath10k_dbg(ATH10K_DBG_HTT, "htt peer map vdev %d peer %pM id %d\n",
+ ev->vdev_id, ev->addr, ev->peer_id);
+
+ set_bit(ev->peer_id, peer->peer_ids);
+exit:
+ spin_unlock_bh(&ar->data_lock);
+}
+
+void ath10k_peer_unmap_event(struct ath10k_htt *htt,
+ struct htt_peer_unmap_event *ev)
+{
+ struct ath10k *ar = htt->ar;
+ struct ath10k_peer *peer;
+
+ spin_lock_bh(&ar->data_lock);
+ peer = ath10k_peer_find_by_id(ar, ev->peer_id);
+ if (!peer) {
+ ath10k_warn("unknown peer id %d\n", ev->peer_id);
+ goto exit;
+ }
+
+ ath10k_dbg(ATH10K_DBG_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
+ peer->vdev_id, peer->addr, ev->peer_id);
+
+ clear_bit(ev->peer_id, peer->peer_ids);
+
+ if (bitmap_empty(peer->peer_ids, ATH10K_MAX_NUM_PEER_IDS)) {
+ list_del(&peer->list);
+ kfree(peer);
+ wake_up(&ar->peer_mapping_wq);
+ }
+
+exit:
+ spin_unlock_bh(&ar->data_lock);
+}