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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 <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Hante Meuleman 2014-09-30 10:23:15 +02:00 committed by John W. Linville
parent ff0a623060
commit 3ba0661099
2 changed files with 108 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/brcm80211/brcmfmac/flowring.c
View File

@ -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;

128
drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
View File

@ -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)