From 3ba066109974dff307f143ffdeddc7af83b2bb8e Mon Sep 17 00:00:00 2001 From: Hante Meuleman Date: Tue, 30 Sep 2014 10:23:15 +0200 Subject: [PATCH] brcmfmac: Avoid usage of GFP_ATOMIC. Msgbuf is using GFP_ATOMIC where GFP_KERNEL is also sufficient. On some platforms the coherent DMA memory is very limited when using GFP_ATOMIC. This patch changes usage of GFP_ATOMIC to GFP_KERNEL and uses worker to make this possible for creation of flowring. Reviewed-by: Arend Van Spriel Reviewed-by: Franky (Zhenhui) Lin Reviewed-by: Pieter-Paul Giesberts Reviewed-by: Daniel (Deognyoun) Kim Signed-off-by: Hante Meuleman Signed-off-by: Arend van Spriel Signed-off-by: John W. Linville --- .../wireless/brcm80211/brcmfmac/flowring.c | 4 +- .../net/wireless/brcm80211/brcmfmac/msgbuf.c | 128 +++++++++++++++--- 2 files changed, 108 insertions(+), 24 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/flowring.c b/drivers/net/wireless/brcm80211/brcmfmac/flowring.c index a1016b811284..1faa929f5fff 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/flowring.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/flowring.c @@ -354,7 +354,7 @@ struct brcmf_flowring *brcmf_flowring_attach(struct device *dev, u16 nrofrings) struct brcmf_flowring *flow; u32 i; - flow = kzalloc(sizeof(*flow), GFP_ATOMIC); + flow = kzalloc(sizeof(*flow), GFP_KERNEL); if (flow) { flow->dev = dev; flow->nrofrings = nrofrings; @@ -364,7 +364,7 @@ struct brcmf_flowring *brcmf_flowring_attach(struct device *dev, u16 nrofrings) for (i = 0; i < ARRAY_SIZE(flow->hash); i++) flow->hash[i].ifidx = BRCMF_FLOWRING_INVALID_IFIDX; flow->rings = kcalloc(nrofrings, sizeof(*flow->rings), - GFP_ATOMIC); + GFP_KERNEL); if (!flow->rings) { kfree(flow); flow = NULL; diff --git a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c index 106e6bf0a5da..11cc051f97cd 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c @@ -208,6 +208,14 @@ struct msgbuf_flowring_flush_resp { __le32 rsvd0[3]; }; +struct brcmf_msgbuf_work_item { + struct list_head queue; + u32 flowid; + int ifidx; + u8 sa[ETH_ALEN]; + u8 da[ETH_ALEN]; +}; + struct brcmf_msgbuf { struct brcmf_pub *drvr; @@ -248,6 +256,10 @@ struct brcmf_msgbuf { struct work_struct txflow_work; unsigned long *flow_map; unsigned long *txstatus_done_map; + + struct work_struct flowring_work; + spinlock_t flowring_work_lock; + struct list_head work_queue; }; struct brcmf_msgbuf_pktid { @@ -284,11 +296,11 @@ brcmf_msgbuf_init_pktids(u32 nr_array_entries, struct brcmf_msgbuf_pktid *array; struct brcmf_msgbuf_pktids *pktids; - array = kcalloc(nr_array_entries, sizeof(*array), GFP_ATOMIC); + array = kcalloc(nr_array_entries, sizeof(*array), GFP_KERNEL); if (!array) return NULL; - pktids = kzalloc(sizeof(*pktids), GFP_ATOMIC); + pktids = kzalloc(sizeof(*pktids), GFP_KERNEL); if (!pktids) { kfree(array); return NULL; @@ -544,11 +556,29 @@ brcmf_msgbuf_remove_flowring(struct brcmf_msgbuf *msgbuf, u16 flowid) } -static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx, - struct sk_buff *skb) +static struct brcmf_msgbuf_work_item * +brcmf_msgbuf_dequeue_work(struct brcmf_msgbuf *msgbuf) +{ + struct brcmf_msgbuf_work_item *work = NULL; + ulong flags; + + spin_lock_irqsave(&msgbuf->flowring_work_lock, flags); + if (!list_empty(&msgbuf->work_queue)) { + work = list_first_entry(&msgbuf->work_queue, + struct brcmf_msgbuf_work_item, queue); + list_del(&work->queue); + } + spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags); + + return work; +} + + +static u32 +brcmf_msgbuf_flowring_create_worker(struct brcmf_msgbuf *msgbuf, + struct brcmf_msgbuf_work_item *work) { struct msgbuf_tx_flowring_create_req *create; - struct ethhdr *eh = (struct ethhdr *)(skb->data); struct brcmf_commonring *commonring; void *ret_ptr; u32 flowid; @@ -557,16 +587,11 @@ static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx, long long address; int err; - flowid = brcmf_flowring_create(msgbuf->flow, eh->h_dest, - skb->priority, ifidx); - if (flowid == BRCMF_FLOWRING_INVALID_ID) - return flowid; - + flowid = work->flowid; dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE; - dma_buf = dma_alloc_coherent(msgbuf->drvr->bus_if->dev, dma_sz, &msgbuf->flowring_dma_handle[flowid], - GFP_ATOMIC); + GFP_KERNEL); if (!dma_buf) { brcmf_err("dma_alloc_coherent failed\n"); brcmf_flowring_delete(msgbuf->flow, flowid); @@ -589,13 +614,13 @@ static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx, create = (struct msgbuf_tx_flowring_create_req *)ret_ptr; create->msg.msgtype = MSGBUF_TYPE_FLOW_RING_CREATE; - create->msg.ifidx = ifidx; + create->msg.ifidx = work->ifidx; create->msg.request_id = 0; create->tid = brcmf_flowring_tid(msgbuf->flow, flowid); create->flow_ring_id = cpu_to_le16(flowid + BRCMF_NROF_H2D_COMMON_MSGRINGS); - memcpy(create->sa, eh->h_source, ETH_ALEN); - memcpy(create->da, eh->h_dest, ETH_ALEN); + memcpy(create->sa, work->sa, ETH_ALEN); + memcpy(create->da, work->da, ETH_ALEN); address = (long long)(long)msgbuf->flowring_dma_handle[flowid]; create->flow_ring_addr.high_addr = cpu_to_le32(address >> 32); create->flow_ring_addr.low_addr = cpu_to_le32(address & 0xffffffff); @@ -603,7 +628,7 @@ static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx, create->len_item = cpu_to_le16(BRCMF_H2D_TXFLOWRING_ITEMSIZE); brcmf_dbg(MSGBUF, "Send Flow Create Req flow ID %d for peer %pM prio %d ifindex %d\n", - flowid, eh->h_dest, create->tid, ifidx); + flowid, work->da, create->tid, work->ifidx); err = brcmf_commonring_write_complete(commonring); brcmf_commonring_unlock(commonring); @@ -617,6 +642,53 @@ static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx, } +static void brcmf_msgbuf_flowring_worker(struct work_struct *work) +{ + struct brcmf_msgbuf *msgbuf; + struct brcmf_msgbuf_work_item *create; + + msgbuf = container_of(work, struct brcmf_msgbuf, flowring_work); + + while ((create = brcmf_msgbuf_dequeue_work(msgbuf))) { + brcmf_msgbuf_flowring_create_worker(msgbuf, create); + kfree(create); + } +} + + +static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx, + struct sk_buff *skb) +{ + struct brcmf_msgbuf_work_item *create; + struct ethhdr *eh = (struct ethhdr *)(skb->data); + u32 flowid; + ulong flags; + + create = kzalloc(sizeof(*create), GFP_ATOMIC); + if (create == NULL) + return BRCMF_FLOWRING_INVALID_ID; + + flowid = brcmf_flowring_create(msgbuf->flow, eh->h_dest, + skb->priority, ifidx); + if (flowid == BRCMF_FLOWRING_INVALID_ID) { + kfree(create); + return flowid; + } + + create->flowid = flowid; + create->ifidx = ifidx; + memcpy(create->sa, eh->h_source, ETH_ALEN); + memcpy(create->da, eh->h_dest, ETH_ALEN); + + spin_lock_irqsave(&msgbuf->flowring_work_lock, flags); + list_add_tail(&create->queue, &msgbuf->work_queue); + spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags); + schedule_work(&msgbuf->flowring_work); + + return flowid; +} + + static void brcmf_msgbuf_txflow(struct brcmf_msgbuf *msgbuf, u8 flowid) { struct brcmf_flowring *flow = msgbuf->flow; @@ -1272,7 +1344,7 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr) u32 count; if_msgbuf = drvr->bus_if->msgbuf; - msgbuf = kzalloc(sizeof(*msgbuf), GFP_ATOMIC); + msgbuf = kzalloc(sizeof(*msgbuf), GFP_KERNEL); if (!msgbuf) goto fail; @@ -1283,11 +1355,11 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr) } INIT_WORK(&msgbuf->txflow_work, brcmf_msgbuf_txflow_worker); count = BITS_TO_LONGS(if_msgbuf->nrof_flowrings); - msgbuf->flow_map = kzalloc(count, GFP_ATOMIC); + msgbuf->flow_map = kzalloc(count, GFP_KERNEL); if (!msgbuf->flow_map) goto fail; - msgbuf->txstatus_done_map = kzalloc(count, GFP_ATOMIC); + msgbuf->txstatus_done_map = kzalloc(count, GFP_KERNEL); if (!msgbuf->txstatus_done_map) goto fail; @@ -1295,7 +1367,7 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr) msgbuf->ioctbuf = dma_alloc_coherent(drvr->bus_if->dev, BRCMF_TX_IOCTL_MAX_MSG_SIZE, &msgbuf->ioctbuf_handle, - GFP_ATOMIC); + GFP_KERNEL); if (!msgbuf->ioctbuf) goto fail; address = (long long)(long)msgbuf->ioctbuf_handle; @@ -1318,7 +1390,7 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr) msgbuf->flowrings = (struct brcmf_commonring **)if_msgbuf->flowrings; msgbuf->nrof_flowrings = if_msgbuf->nrof_flowrings; msgbuf->flowring_dma_handle = kzalloc(msgbuf->nrof_flowrings * - sizeof(*msgbuf->flowring_dma_handle), GFP_ATOMIC); + sizeof(*msgbuf->flowring_dma_handle), GFP_KERNEL); if (!msgbuf->flowring_dma_handle) goto fail; @@ -1358,6 +1430,10 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr) brcmf_msgbuf_rxbuf_event_post(msgbuf); brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf); + INIT_WORK(&msgbuf->flowring_work, brcmf_msgbuf_flowring_worker); + spin_lock_init(&msgbuf->flowring_work_lock); + INIT_LIST_HEAD(&msgbuf->work_queue); + return 0; fail: @@ -1380,11 +1456,19 @@ fail: void brcmf_proto_msgbuf_detach(struct brcmf_pub *drvr) { struct brcmf_msgbuf *msgbuf; + struct brcmf_msgbuf_work_item *work; brcmf_dbg(TRACE, "Enter\n"); if (drvr->proto->pd) { msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd; - + cancel_work_sync(&msgbuf->flowring_work); + while (!list_empty(&msgbuf->work_queue)) { + work = list_first_entry(&msgbuf->work_queue, + struct brcmf_msgbuf_work_item, + queue); + list_del(&work->queue); + kfree(work); + } kfree(msgbuf->flow_map); kfree(msgbuf->txstatus_done_map); if (msgbuf->txflow_wq) -- 2.20.1