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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/inaky/wimax

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This commit is contained in:
David S. Miller
2010-05-15 23:14:16 -07:00
parent e0f43752a9 0fb0a4f00a
commit 1cdc5abf40
11 changed files with 480 additions and 117 deletions
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109
drivers/net/wimax/i2400m/rx.c
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@@ -155,6 +155,11 @@
#define D_SUBMODULE rx
#include "debug-levels.h"
static int i2400m_rx_reorder_disabled; /* 0 (rx reorder enabled) by default */
module_param_named(rx_reorder_disabled, i2400m_rx_reorder_disabled, int, 0644);
MODULE_PARM_DESC(rx_reorder_disabled,
"If true, RX reordering will be disabled.");
struct i2400m_report_hook_args {
struct sk_buff *skb_rx;
const struct i2400m_l3l4_hdr *l3l4_hdr;
@@ -300,17 +305,16 @@ void i2400m_rx_ctl_ack(struct i2400m *i2400m,
d_printf(1, dev, "Huh? waiter for command reply cancelled\n");
goto error_waiter_cancelled;
}
if (ack_skb == NULL) {
if (IS_ERR(ack_skb))
dev_err(dev, "CMD/GET/SET ack: cannot allocate SKB\n");
i2400m->ack_skb = ERR_PTR(-ENOMEM);
} else
i2400m->ack_skb = ack_skb;
i2400m->ack_skb = ack_skb;
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
complete(&i2400m->msg_completion);
return;
error_waiter_cancelled:
kfree_skb(ack_skb);
if (!IS_ERR(ack_skb))
kfree_skb(ack_skb);
error_no_waiter:
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
}
@@ -741,12 +745,12 @@ unsigned __i2400m_roq_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
unsigned new_nws, nsn_itr;
new_nws = __i2400m_roq_nsn(roq, sn);
if (unlikely(new_nws >= 1024) && d_test(1)) {
dev_err(dev, "SW BUG? __update_ws new_nws %u (sn %u ws %u)\n",
new_nws, sn, roq->ws);
WARN_ON(1);
i2400m_roq_log_dump(i2400m, roq);
}
/*
* For type 2(update_window_start) rx messages, there is no
* need to check if the normalized sequence number is greater 1023.
* Simply insert and deliver all packets to the host up to the
* window start.
*/
skb_queue_walk_safe(&roq->queue, skb_itr, tmp_itr) {
roq_data_itr = (struct i2400m_roq_data *) &skb_itr->cb;
nsn_itr = __i2400m_roq_nsn(roq, roq_data_itr->sn);
@@ -885,31 +889,51 @@ void i2400m_roq_queue_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
i2400m, roq, skb, sn);
len = skb_queue_len(&roq->queue);
nsn = __i2400m_roq_nsn(roq, sn);
/*
* For type 3(queue_update_window_start) rx messages, there is no
* need to check if the normalized sequence number is greater 1023.
* Simply insert and deliver all packets to the host up to the
* window start.
*/
old_ws = roq->ws;
if (unlikely(nsn >= 1024)) {
dev_err(dev, "SW BUG? queue_update_ws nsn %u (sn %u ws %u)\n",
nsn, sn, roq->ws);
i2400m_roq_log_dump(i2400m, roq);
i2400m_reset(i2400m, I2400M_RT_WARM);
} else {
/* if the queue is empty, don't bother as we'd queue
* it and inmediately unqueue it -- just deliver it */
if (len == 0) {
struct i2400m_roq_data *roq_data;
roq_data = (struct i2400m_roq_data *) &skb->cb;
i2400m_net_erx(i2400m, skb, roq_data->cs);
}
else
__i2400m_roq_queue(i2400m, roq, skb, sn, nsn);
__i2400m_roq_update_ws(i2400m, roq, sn + 1);
i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_PACKET_WS,
old_ws, len, sn, nsn, roq->ws);
}
/* If the queue is empty, don't bother as we'd queue
* it and immediately unqueue it -- just deliver it.
*/
if (len == 0) {
struct i2400m_roq_data *roq_data;
roq_data = (struct i2400m_roq_data *) &skb->cb;
i2400m_net_erx(i2400m, skb, roq_data->cs);
} else
__i2400m_roq_queue(i2400m, roq, skb, sn, nsn);
__i2400m_roq_update_ws(i2400m, roq, sn + 1);
i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_PACKET_WS,
old_ws, len, sn, nsn, roq->ws);
d_fnend(2, dev, "(i2400m %p roq %p skb %p sn %u) = void\n",
i2400m, roq, skb, sn);
}
/*
* This routine destroys the memory allocated for rx_roq, when no
* other thread is accessing it. Access to rx_roq is refcounted by
* rx_roq_refcount, hence memory allocated must be destroyed when
* rx_roq_refcount becomes zero. This routine gets executed when
* rx_roq_refcount becomes zero.
*/
void i2400m_rx_roq_destroy(struct kref *ref)
{
unsigned itr;
struct i2400m *i2400m
= container_of(ref, struct i2400m, rx_roq_refcount);
for (itr = 0; itr < I2400M_RO_CIN + 1; itr++)
__skb_queue_purge(&i2400m->rx_roq[itr].queue);
kfree(i2400m->rx_roq[0].log);
kfree(i2400m->rx_roq);
i2400m->rx_roq = NULL;
}
/*
* Receive and send up an extended data packet
*
@@ -963,6 +987,7 @@ void i2400m_rx_edata(struct i2400m *i2400m, struct sk_buff *skb_rx,
unsigned ro_needed, ro_type, ro_cin, ro_sn;
struct i2400m_roq *roq;
struct i2400m_roq_data *roq_data;
unsigned long flags;
BUILD_BUG_ON(ETH_HLEN > sizeof(*hdr));
@@ -1001,7 +1026,16 @@ void i2400m_rx_edata(struct i2400m *i2400m, struct sk_buff *skb_rx,
ro_cin = (reorder >> I2400M_RO_CIN_SHIFT) & I2400M_RO_CIN;
ro_sn = (reorder >> I2400M_RO_SN_SHIFT) & I2400M_RO_SN;
spin_lock_irqsave(&i2400m->rx_lock, flags);
roq = &i2400m->rx_roq[ro_cin];
if (roq == NULL) {
kfree_skb(skb); /* rx_roq is already destroyed */
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
goto error;
}
kref_get(&i2400m->rx_roq_refcount);
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
roq_data = (struct i2400m_roq_data *) &skb->cb;
roq_data->sn = ro_sn;
roq_data->cs = cs;
@@ -1028,6 +1062,10 @@ void i2400m_rx_edata(struct i2400m *i2400m, struct sk_buff *skb_rx,
default:
dev_err(dev, "HW BUG? unknown reorder type %u\n", ro_type);
}
spin_lock_irqsave(&i2400m->rx_lock, flags);
kref_put(&i2400m->rx_roq_refcount, i2400m_rx_roq_destroy);
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
}
else
i2400m_net_erx(i2400m, skb, cs);
@@ -1337,6 +1375,7 @@ int i2400m_rx_setup(struct i2400m *i2400m)
__i2400m_roq_init(&i2400m->rx_roq[itr]);
i2400m->rx_roq[itr].log = &rd[itr];
}
kref_init(&i2400m->rx_roq_refcount);
}
return 0;
@@ -1350,12 +1389,12 @@ error_roq_alloc:
/* Tear down the RX queue and infrastructure */
void i2400m_rx_release(struct i2400m *i2400m)
{
unsigned long flags;
if (i2400m->rx_reorder) {
unsigned itr;
for(itr = 0; itr < I2400M_RO_CIN + 1; itr++)
__skb_queue_purge(&i2400m->rx_roq[itr].queue);
kfree(i2400m->rx_roq[0].log);
kfree(i2400m->rx_roq);
spin_lock_irqsave(&i2400m->rx_lock, flags);
kref_put(&i2400m->rx_roq_refcount, i2400m_rx_roq_destroy);
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
}
/* at this point, nothing can be received... */
i2400m_report_hook_flush(i2400m);