- patches.arch/x86_mce_intel_decode_physical_address.patch:
[linux-flexiantxendom0-3.2.10.git] / drivers / net / wireless / ath / ath9k / recv.c
index 1ca42e5..ca6065b 100644 (file)
  */
 
 #include "ath9k.h"
+#include "ar9003_mac.h"
+
+#define SKB_CB_ATHBUF(__skb)   (*((struct ath_buf **)__skb->cb))
+
+static inline bool ath9k_check_auto_sleep(struct ath_softc *sc)
+{
+       return sc->ps_enabled &&
+              (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP);
+}
 
 static struct ieee80211_hw * ath_get_virt_hw(struct ath_softc *sc,
                                             struct ieee80211_hdr *hdr)
@@ -115,56 +124,244 @@ static void ath_opmode_init(struct ath_softc *sc)
        ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
 }
 
-int ath_rx_init(struct ath_softc *sc, int nbufs)
+static bool ath_rx_edma_buf_link(struct ath_softc *sc,
+                                enum ath9k_rx_qtype qtype)
 {
-       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath_rx_edma *rx_edma;
        struct sk_buff *skb;
        struct ath_buf *bf;
-       int error = 0;
 
-       spin_lock_init(&sc->rx.rxflushlock);
-       sc->sc_flags &= ~SC_OP_RXFLUSH;
-       spin_lock_init(&sc->rx.rxbuflock);
+       rx_edma = &sc->rx.rx_edma[qtype];
+       if (skb_queue_len(&rx_edma->rx_fifo) >= rx_edma->rx_fifo_hwsize)
+               return false;
 
-       common->rx_bufsize = roundup(IEEE80211_MAX_MPDU_LEN,
-                                    min(common->cachelsz, (u16)64));
+       bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list);
+       list_del_init(&bf->list);
 
-       ath_print(common, ATH_DBG_CONFIG, "cachelsz %u rxbufsize %u\n",
-                 common->cachelsz, common->rx_bufsize);
+       skb = bf->bf_mpdu;
+
+       ATH_RXBUF_RESET(bf);
+       memset(skb->data, 0, ah->caps.rx_status_len);
+       dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
+                               ah->caps.rx_status_len, DMA_TO_DEVICE);
+
+       SKB_CB_ATHBUF(skb) = bf;
+       ath9k_hw_addrxbuf_edma(ah, bf->bf_buf_addr, qtype);
+       skb_queue_tail(&rx_edma->rx_fifo, skb);
+
+       return true;
+}
 
-       /* Initialize rx descriptors */
+static void ath_rx_addbuffer_edma(struct ath_softc *sc,
+                                 enum ath9k_rx_qtype qtype, int size)
+{
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       u32 nbuf = 0;
 
-       error = ath_descdma_setup(sc, &sc->rx.rxdma, &sc->rx.rxbuf,
-                                 "rx", nbufs, 1);
-       if (error != 0) {
-               ath_print(common, ATH_DBG_FATAL,
-                         "failed to allocate rx descriptors: %d\n", error);
-               goto err;
+       if (list_empty(&sc->rx.rxbuf)) {
+               ath_print(common, ATH_DBG_QUEUE, "No free rx buf available\n");
+               return;
        }
 
+       while (!list_empty(&sc->rx.rxbuf)) {
+               nbuf++;
+
+               if (!ath_rx_edma_buf_link(sc, qtype))
+                       break;
+
+               if (nbuf >= size)
+                       break;
+       }
+}
+
+static void ath_rx_remove_buffer(struct ath_softc *sc,
+                                enum ath9k_rx_qtype qtype)
+{
+       struct ath_buf *bf;
+       struct ath_rx_edma *rx_edma;
+       struct sk_buff *skb;
+
+       rx_edma = &sc->rx.rx_edma[qtype];
+
+       while ((skb = skb_dequeue(&rx_edma->rx_fifo)) != NULL) {
+               bf = SKB_CB_ATHBUF(skb);
+               BUG_ON(!bf);
+               list_add_tail(&bf->list, &sc->rx.rxbuf);
+       }
+}
+
+static void ath_rx_edma_cleanup(struct ath_softc *sc)
+{
+       struct ath_buf *bf;
+
+       ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_LP);
+       ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_HP);
+
        list_for_each_entry(bf, &sc->rx.rxbuf, list) {
+               if (bf->bf_mpdu)
+                       dev_kfree_skb_any(bf->bf_mpdu);
+       }
+
+       INIT_LIST_HEAD(&sc->rx.rxbuf);
+
+       kfree(sc->rx.rx_bufptr);
+       sc->rx.rx_bufptr = NULL;
+}
+
+static void ath_rx_edma_init_queue(struct ath_rx_edma *rx_edma, int size)
+{
+       skb_queue_head_init(&rx_edma->rx_fifo);
+       skb_queue_head_init(&rx_edma->rx_buffers);
+       rx_edma->rx_fifo_hwsize = size;
+}
+
+static int ath_rx_edma_init(struct ath_softc *sc, int nbufs)
+{
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       struct ath_hw *ah = sc->sc_ah;
+       struct sk_buff *skb;
+       struct ath_buf *bf;
+       int error = 0, i;
+       u32 size;
+
+
+       common->rx_bufsize = roundup(IEEE80211_MAX_MPDU_LEN +
+                                    ah->caps.rx_status_len,
+                                    min(common->cachelsz, (u16)64));
+
+       ath9k_hw_set_rx_bufsize(ah, common->rx_bufsize -
+                                   ah->caps.rx_status_len);
+
+       ath_rx_edma_init_queue(&sc->rx.rx_edma[ATH9K_RX_QUEUE_LP],
+                              ah->caps.rx_lp_qdepth);
+       ath_rx_edma_init_queue(&sc->rx.rx_edma[ATH9K_RX_QUEUE_HP],
+                              ah->caps.rx_hp_qdepth);
+
+       size = sizeof(struct ath_buf) * nbufs;
+       bf = kzalloc(size, GFP_KERNEL);
+       if (!bf)
+               return -ENOMEM;
+
+       INIT_LIST_HEAD(&sc->rx.rxbuf);
+       sc->rx.rx_bufptr = bf;
+
+       for (i = 0; i < nbufs; i++, bf++) {
                skb = ath_rxbuf_alloc(common, common->rx_bufsize, GFP_KERNEL);
-               if (skb == NULL) {
+               if (!skb) {
                        error = -ENOMEM;
-                       goto err;
+                       goto rx_init_fail;
                }
 
+               memset(skb->data, 0, common->rx_bufsize);
                bf->bf_mpdu = skb;
+
                bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
                                                 common->rx_bufsize,
-                                                DMA_FROM_DEVICE);
+                                                DMA_BIDIRECTIONAL);
                if (unlikely(dma_mapping_error(sc->dev,
-                                              bf->bf_buf_addr))) {
-                       dev_kfree_skb_any(skb);
-                       bf->bf_mpdu = NULL;
+                                               bf->bf_buf_addr))) {
+                               dev_kfree_skb_any(skb);
+                               bf->bf_mpdu = NULL;
+                               ath_print(common, ATH_DBG_FATAL,
+                                       "dma_mapping_error() on RX init\n");
+                               error = -ENOMEM;
+                               goto rx_init_fail;
+               }
+
+               list_add_tail(&bf->list, &sc->rx.rxbuf);
+       }
+
+       return 0;
+
+rx_init_fail:
+       ath_rx_edma_cleanup(sc);
+       return error;
+}
+
+static void ath_edma_start_recv(struct ath_softc *sc)
+{
+       spin_lock_bh(&sc->rx.rxbuflock);
+
+       ath9k_hw_rxena(sc->sc_ah);
+
+       ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_HP,
+                             sc->rx.rx_edma[ATH9K_RX_QUEUE_HP].rx_fifo_hwsize);
+
+       ath_rx_addbuffer_edma(sc, ATH9K_RX_QUEUE_LP,
+                             sc->rx.rx_edma[ATH9K_RX_QUEUE_LP].rx_fifo_hwsize);
+
+       spin_unlock_bh(&sc->rx.rxbuflock);
+
+       ath_opmode_init(sc);
+
+       ath9k_hw_startpcureceive(sc->sc_ah);
+}
+
+static void ath_edma_stop_recv(struct ath_softc *sc)
+{
+       spin_lock_bh(&sc->rx.rxbuflock);
+       ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_HP);
+       ath_rx_remove_buffer(sc, ATH9K_RX_QUEUE_LP);
+       spin_unlock_bh(&sc->rx.rxbuflock);
+}
+
+int ath_rx_init(struct ath_softc *sc, int nbufs)
+{
+       struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+       struct sk_buff *skb;
+       struct ath_buf *bf;
+       int error = 0;
+
+       spin_lock_init(&sc->rx.rxflushlock);
+       sc->sc_flags &= ~SC_OP_RXFLUSH;
+       spin_lock_init(&sc->rx.rxbuflock);
+
+       if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
+               return ath_rx_edma_init(sc, nbufs);
+       } else {
+               common->rx_bufsize = roundup(IEEE80211_MAX_MPDU_LEN,
+                               min(common->cachelsz, (u16)64));
+
+               ath_print(common, ATH_DBG_CONFIG, "cachelsz %u rxbufsize %u\n",
+                               common->cachelsz, common->rx_bufsize);
+
+               /* Initialize rx descriptors */
+
+               error = ath_descdma_setup(sc, &sc->rx.rxdma, &sc->rx.rxbuf,
+                               "rx", nbufs, 1, 0);
+               if (error != 0) {
                        ath_print(common, ATH_DBG_FATAL,
-                                 "dma_mapping_error() on RX init\n");
-                       error = -ENOMEM;
+                                 "failed to allocate rx descriptors: %d\n",
+                                 error);
                        goto err;
                }
-               bf->bf_dmacontext = bf->bf_buf_addr;
+
+               list_for_each_entry(bf, &sc->rx.rxbuf, list) {
+                       skb = ath_rxbuf_alloc(common, common->rx_bufsize,
+                                             GFP_KERNEL);
+                       if (skb == NULL) {
+                               error = -ENOMEM;
+                               goto err;
+                       }
+
+                       bf->bf_mpdu = skb;
+                       bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
+                                       common->rx_bufsize,
+                                       DMA_FROM_DEVICE);
+                       if (unlikely(dma_mapping_error(sc->dev,
+                                                       bf->bf_buf_addr))) {
+                               dev_kfree_skb_any(skb);
+                               bf->bf_mpdu = NULL;
+                               ath_print(common, ATH_DBG_FATAL,
+                                         "dma_mapping_error() on RX init\n");
+                               error = -ENOMEM;
+                               goto err;
+                       }
+                       bf->bf_dmacontext = bf->bf_buf_addr;
+               }
+               sc->rx.rxlink = NULL;
        }
-       sc->rx.rxlink = NULL;
 
 err:
        if (error)
@@ -180,17 +377,23 @@ void ath_rx_cleanup(struct ath_softc *sc)
        struct sk_buff *skb;
        struct ath_buf *bf;
 
-       list_for_each_entry(bf, &sc->rx.rxbuf, list) {
-               skb = bf->bf_mpdu;
-               if (skb) {
-                       dma_unmap_single(sc->dev, bf->bf_buf_addr,
-                                        common->rx_bufsize, DMA_FROM_DEVICE);
-                       dev_kfree_skb(skb);
+       if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
+               ath_rx_edma_cleanup(sc);
+               return;
+       } else {
+               list_for_each_entry(bf, &sc->rx.rxbuf, list) {
+                       skb = bf->bf_mpdu;
+                       if (skb) {
+                               dma_unmap_single(sc->dev, bf->bf_buf_addr,
+                                               common->rx_bufsize,
+                                               DMA_FROM_DEVICE);
+                               dev_kfree_skb(skb);
+                       }
                }
-       }
 
-       if (sc->rx.rxdma.dd_desc_len != 0)
-               ath_descdma_cleanup(sc, &sc->rx.rxdma, &sc->rx.rxbuf);
+               if (sc->rx.rxdma.dd_desc_len != 0)
+                       ath_descdma_cleanup(sc, &sc->rx.rxdma, &sc->rx.rxbuf);
+       }
 }
 
 /*
@@ -273,6 +476,11 @@ int ath_startrecv(struct ath_softc *sc)
        struct ath_hw *ah = sc->sc_ah;
        struct ath_buf *bf, *tbf;
 
+       if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
+               ath_edma_start_recv(sc);
+               return 0;
+       }
+
        spin_lock_bh(&sc->rx.rxbuflock);
        if (list_empty(&sc->rx.rxbuf))
                goto start_recv;
@@ -306,7 +514,11 @@ bool ath_stoprecv(struct ath_softc *sc)
        ath9k_hw_stoppcurecv(ah);
        ath9k_hw_setrxfilter(ah, 0);
        stopped = ath9k_hw_stopdmarecv(ah);
-       sc->rx.rxlink = NULL;
+
+       if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
+               ath_edma_stop_recv(sc);
+       else
+               sc->rx.rxlink = NULL;
 
        return stopped;
 }
@@ -315,7 +527,9 @@ void ath_flushrecv(struct ath_softc *sc)
 {
        spin_lock_bh(&sc->rx.rxflushlock);
        sc->sc_flags |= SC_OP_RXFLUSH;
-       ath_rx_tasklet(sc, 1);
+       if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
+               ath_rx_tasklet(sc, 1, true);
+       ath_rx_tasklet(sc, 1, false);
        sc->sc_flags &= ~SC_OP_RXFLUSH;
        spin_unlock_bh(&sc->rx.rxflushlock);
 }
@@ -408,8 +622,8 @@ static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb)
        hdr = (struct ieee80211_hdr *)skb->data;
 
        /* Process Beacon and CAB receive in PS state */
-       if ((sc->ps_flags & PS_WAIT_FOR_BEACON) &&
-           ieee80211_is_beacon(hdr->frame_control))
+       if (((sc->ps_flags & PS_WAIT_FOR_BEACON) || ath9k_check_auto_sleep(sc))
+           && ieee80211_is_beacon(hdr->frame_control))
                ath_rx_ps_beacon(sc, skb);
        else if ((sc->ps_flags & PS_WAIT_FOR_CAB) &&
                 (ieee80211_is_data(hdr->frame_control) ||
@@ -469,15 +683,148 @@ static void ath_rx_send_to_mac80211(struct ieee80211_hw *hw,
                ieee80211_rx(hw, skb);
 }
 
-int ath_rx_tasklet(struct ath_softc *sc, int flush)
+static bool ath_edma_get_buffers(struct ath_softc *sc,
+                                enum ath9k_rx_qtype qtype)
 {
-#define PA2DESC(_sc, _pa)                                               \
-       ((struct ath_desc *)((caddr_t)(_sc)->rx.rxdma.dd_desc +         \
-                            ((_pa) - (_sc)->rx.rxdma.dd_desc_paddr)))
+       struct ath_rx_edma *rx_edma = &sc->rx.rx_edma[qtype];
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath_common *common = ath9k_hw_common(ah);
+       struct sk_buff *skb;
+       struct ath_buf *bf;
+       int ret;
+
+       skb = skb_peek(&rx_edma->rx_fifo);
+       if (!skb)
+               return false;
+
+       bf = SKB_CB_ATHBUF(skb);
+       BUG_ON(!bf);
+
+       dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
+                               common->rx_bufsize, DMA_FROM_DEVICE);
+
+       ret = ath9k_hw_process_rxdesc_edma(ah, NULL, skb->data);
+       if (ret == -EINPROGRESS)
+               return false;
+
+       __skb_unlink(skb, &rx_edma->rx_fifo);
+       if (ret == -EINVAL) {
+               /* corrupt descriptor, skip this one and the following one */
+               list_add_tail(&bf->list, &sc->rx.rxbuf);
+               ath_rx_edma_buf_link(sc, qtype);
+               skb = skb_peek(&rx_edma->rx_fifo);
+               if (!skb)
+                       return true;
+
+               bf = SKB_CB_ATHBUF(skb);
+               BUG_ON(!bf);
 
+               __skb_unlink(skb, &rx_edma->rx_fifo);
+               list_add_tail(&bf->list, &sc->rx.rxbuf);
+               ath_rx_edma_buf_link(sc, qtype);
+               return true;
+       }
+       skb_queue_tail(&rx_edma->rx_buffers, skb);
+
+       return true;
+}
+
+static struct ath_buf *ath_edma_get_next_rx_buf(struct ath_softc *sc,
+                                               struct ath_rx_status *rs,
+                                               enum ath9k_rx_qtype qtype)
+{
+       struct ath_rx_edma *rx_edma = &sc->rx.rx_edma[qtype];
+       struct sk_buff *skb;
        struct ath_buf *bf;
+
+       while (ath_edma_get_buffers(sc, qtype));
+       skb = __skb_dequeue(&rx_edma->rx_buffers);
+       if (!skb)
+               return NULL;
+
+       bf = SKB_CB_ATHBUF(skb);
+       ath9k_hw_process_rxdesc_edma(sc->sc_ah, rs, skb->data);
+       return bf;
+}
+
+static struct ath_buf *ath_get_next_rx_buf(struct ath_softc *sc,
+                                          struct ath_rx_status *rs)
+{
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath_common *common = ath9k_hw_common(ah);
        struct ath_desc *ds;
-       struct ath_rx_status *rx_stats;
+       struct ath_buf *bf;
+       int ret;
+
+       if (list_empty(&sc->rx.rxbuf)) {
+               sc->rx.rxlink = NULL;
+               return NULL;
+       }
+
+       bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list);
+       ds = bf->bf_desc;
+
+       /*
+        * Must provide the virtual address of the current
+        * descriptor, the physical address, and the virtual
+        * address of the next descriptor in the h/w chain.
+        * This allows the HAL to look ahead to see if the
+        * hardware is done with a descriptor by checking the
+        * done bit in the following descriptor and the address
+        * of the current descriptor the DMA engine is working
+        * on.  All this is necessary because of our use of
+        * a self-linked list to avoid rx overruns.
+        */
+       ret = ath9k_hw_rxprocdesc(ah, ds, rs, 0);
+       if (ret == -EINPROGRESS) {
+               struct ath_rx_status trs;
+               struct ath_buf *tbf;
+               struct ath_desc *tds;
+
+               memset(&trs, 0, sizeof(trs));
+               if (list_is_last(&bf->list, &sc->rx.rxbuf)) {
+                       sc->rx.rxlink = NULL;
+                       return NULL;
+               }
+
+               tbf = list_entry(bf->list.next, struct ath_buf, list);
+
+               /*
+                * On some hardware the descriptor status words could
+                * get corrupted, including the done bit. Because of
+                * this, check if the next descriptor's done bit is
+                * set or not.
+                *
+                * If the next descriptor's done bit is set, the current
+                * descriptor has been corrupted. Force s/w to discard
+                * this descriptor and continue...
+                */
+
+               tds = tbf->bf_desc;
+               ret = ath9k_hw_rxprocdesc(ah, tds, &trs, 0);
+               if (ret == -EINPROGRESS)
+                       return NULL;
+       }
+
+       if (!bf->bf_mpdu)
+               return bf;
+
+       /*
+        * Synchronize the DMA transfer with CPU before
+        * 1. accessing the frame
+        * 2. requeueing the same buffer to h/w
+        */
+       dma_sync_single_for_device(sc->dev, bf->bf_buf_addr,
+                       common->rx_bufsize,
+                       DMA_FROM_DEVICE);
+
+       return bf;
+}
+
+
+int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
+{
+       struct ath_buf *bf;
        struct sk_buff *skb = NULL, *requeue_skb;
        struct ieee80211_rx_status *rxs;
        struct ath_hw *ah = sc->sc_ah;
@@ -491,7 +838,17 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
        struct ieee80211_hdr *hdr;
        int retval;
        bool decrypt_error = false;
+       struct ath_rx_status rs;
+       enum ath9k_rx_qtype qtype;
+       bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
+       int dma_type;
 
+       if (edma)
+               dma_type = DMA_FROM_DEVICE;
+       else
+               dma_type = DMA_BIDIRECTIONAL;
+
+       qtype = hp ? ATH9K_RX_QUEUE_HP : ATH9K_RX_QUEUE_LP;
        spin_lock_bh(&sc->rx.rxbuflock);
 
        do {
@@ -499,79 +856,25 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
                if ((sc->sc_flags & SC_OP_RXFLUSH) && (flush == 0))
                        break;
 
-               if (list_empty(&sc->rx.rxbuf)) {
-                       sc->rx.rxlink = NULL;
-                       break;
-               }
-
-               bf = list_first_entry(&sc->rx.rxbuf, struct ath_buf, list);
-               ds = bf->bf_desc;
-
-               /*
-                * Must provide the virtual address of the current
-                * descriptor, the physical address, and the virtual
-                * address of the next descriptor in the h/w chain.
-                * This allows the HAL to look ahead to see if the
-                * hardware is done with a descriptor by checking the
-                * done bit in the following descriptor and the address
-                * of the current descriptor the DMA engine is working
-                * on.  All this is necessary because of our use of
-                * a self-linked list to avoid rx overruns.
-                */
-               retval = ath9k_hw_rxprocdesc(ah, ds,
-                                            bf->bf_daddr,
-                                            PA2DESC(sc, ds->ds_link),
-                                            0);
-               if (retval == -EINPROGRESS) {
-                       struct ath_buf *tbf;
-                       struct ath_desc *tds;
-
-                       if (list_is_last(&bf->list, &sc->rx.rxbuf)) {
-                               sc->rx.rxlink = NULL;
-                               break;
-                       }
+               memset(&rs, 0, sizeof(rs));
+               if (edma)
+                       bf = ath_edma_get_next_rx_buf(sc, &rs, qtype);
+               else
+                       bf = ath_get_next_rx_buf(sc, &rs);
 
-                       tbf = list_entry(bf->list.next, struct ath_buf, list);
-
-                       /*
-                        * On some hardware the descriptor status words could
-                        * get corrupted, including the done bit. Because of
-                        * this, check if the next descriptor's done bit is
-                        * set or not.
-                        *
-                        * If the next descriptor's done bit is set, the current
-                        * descriptor has been corrupted. Force s/w to discard
-                        * this descriptor and continue...
-                        */
-
-                       tds = tbf->bf_desc;
-                       retval = ath9k_hw_rxprocdesc(ah, tds, tbf->bf_daddr,
-                                            PA2DESC(sc, tds->ds_link), 0);
-                       if (retval == -EINPROGRESS) {
-                               break;
-                       }
-               }
+               if (!bf)
+                       break;
 
                skb = bf->bf_mpdu;
                if (!skb)
                        continue;
 
-               /*
-                * Synchronize the DMA transfer with CPU before
-                * 1. accessing the frame
-                * 2. requeueing the same buffer to h/w
-                */
-               dma_sync_single_for_cpu(sc->dev, bf->bf_buf_addr,
-                               common->rx_bufsize,
-                               DMA_FROM_DEVICE);
-
                hdr = (struct ieee80211_hdr *) skb->data;
                rxs =  IEEE80211_SKB_RXCB(skb);
 
                hw = ath_get_virt_hw(sc, hdr);
-               rx_stats = &ds->ds_rxstat;
 
-               ath_debug_stat_rx(sc, bf);
+               ath_debug_stat_rx(sc, &rs);
 
                /*
                 * If we're asked to flush receive queue, directly
@@ -580,7 +883,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
                if (flush)
                        goto requeue;
 
-               retval = ath9k_cmn_rx_skb_preprocess(common, hw, skb, rx_stats,
+               retval = ath9k_cmn_rx_skb_preprocess(common, hw, skb, &rs,
                                                     rxs, &decrypt_error);
                if (retval)
                        goto requeue;
@@ -599,18 +902,20 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
                /* Unmap the frame */
                dma_unmap_single(sc->dev, bf->bf_buf_addr,
                                 common->rx_bufsize,
-                                DMA_FROM_DEVICE);
+                                dma_type);
 
-               skb_put(skb, rx_stats->rs_datalen);
+               skb_put(skb, rs.rs_datalen + ah->caps.rx_status_len);
+               if (ah->caps.rx_status_len)
+                       skb_pull(skb, ah->caps.rx_status_len);
 
-               ath9k_cmn_rx_skb_postprocess(common, skb, rx_stats,
+               ath9k_cmn_rx_skb_postprocess(common, skb, &rs,
                                             rxs, decrypt_error);
 
                /* We will now give hardware our shiny new allocated skb */
                bf->bf_mpdu = requeue_skb;
                bf->bf_buf_addr = dma_map_single(sc->dev, requeue_skb->data,
                                                 common->rx_bufsize,
-                                                DMA_FROM_DEVICE);
+                                                dma_type);
                if (unlikely(dma_mapping_error(sc->dev,
                          bf->bf_buf_addr))) {
                        dev_kfree_skb_any(requeue_skb);
@@ -626,27 +931,32 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
                 * change the default rx antenna if rx diversity chooses the
                 * other antenna 3 times in a row.
                 */
-               if (sc->rx.defant != ds->ds_rxstat.rs_antenna) {
+               if (sc->rx.defant != rs.rs_antenna) {
                        if (++sc->rx.rxotherant >= 3)
-                               ath_setdefantenna(sc, rx_stats->rs_antenna);
+                               ath_setdefantenna(sc, rs.rs_antenna);
                } else {
                        sc->rx.rxotherant = 0;
                }
 
-               if (unlikely(sc->ps_flags & (PS_WAIT_FOR_BEACON |
-                                            PS_WAIT_FOR_CAB |
-                                            PS_WAIT_FOR_PSPOLL_DATA)))
+               if (unlikely(ath9k_check_auto_sleep(sc) ||
+                            (sc->ps_flags & (PS_WAIT_FOR_BEACON |
+                                             PS_WAIT_FOR_CAB |
+                                             PS_WAIT_FOR_PSPOLL_DATA))))
                        ath_rx_ps(sc, skb);
 
                ath_rx_send_to_mac80211(hw, sc, skb, rxs);
 
 requeue:
-               list_move_tail(&bf->list, &sc->rx.rxbuf);
-               ath_rx_buf_link(sc, bf);
+               if (edma) {
+                       list_add_tail(&bf->list, &sc->rx.rxbuf);
+                       ath_rx_edma_buf_link(sc, qtype);
+               } else {
+                       list_move_tail(&bf->list, &sc->rx.rxbuf);
+                       ath_rx_buf_link(sc, bf);
+               }
        } while (1);
 
        spin_unlock_bh(&sc->rx.rxbuflock);
 
        return 0;
-#undef PA2DESC
 }