| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <adazlyrgazr.fsf_-_@cisco.com>
Date: Tue, 09 Oct 2007 15:48:56 -0700
From: Roland Dreier <rdreier@...co.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, general@...ts.openfabrics.org,
jeff@...zik.org
Subject: [PATCH 4/4] ibm_emac: Convert to use napi_struct independent of struct net_device
Commit da3dedd9 ("[NET]: Make NAPI polling independent of struct
net_device objects.") changed the interface to NAPI polling. Fix up
the ibm_newemac driver so that it works with this new interface. This
is actually a nice cleanup because ibm_newemac is one of the drivers
that wants to have multiple NAPI structures for a single net_device.
Compile-tested only as I don't have a system that uses the ibm_newemac
driver. This conversion the conversion for the ibm_emac driver that
was tested on real PowerPC 440SPe hardware.
Signed-off-by: Roland Dreier <rolandd@...co.com>
---
drivers/net/ibm_newemac/mal.c | 55 ++++++++++++++--------------------------
drivers/net/ibm_newemac/mal.h | 2 +-
2 files changed, 20 insertions(+), 37 deletions(-)
diff --git a/drivers/net/ibm_newemac/mal.c b/drivers/net/ibm_newemac/mal.c
index c4335b7..5885411 100644
--- a/drivers/net/ibm_newemac/mal.c
+++ b/drivers/net/ibm_newemac/mal.c
@@ -235,10 +235,10 @@ static irqreturn_t mal_serr(int irq, void *dev_instance)
static inline void mal_schedule_poll(struct mal_instance *mal)
{
- if (likely(netif_rx_schedule_prep(&mal->poll_dev))) {
+ if (likely(napi_schedule_prep(&mal->napi))) {
MAL_DBG2(mal, "schedule_poll" NL);
mal_disable_eob_irq(mal);
- __netif_rx_schedule(&mal->poll_dev);
+ __napi_schedule(&mal->napi);
} else
MAL_DBG2(mal, "already in poll" NL);
}
@@ -318,8 +318,7 @@ void mal_poll_disable(struct mal_instance *mal, struct mal_commac *commac)
msleep(1);
/* Synchronize with the MAL NAPI poller. */
- while (test_bit(__LINK_STATE_RX_SCHED, &mal->poll_dev.state))
- msleep(1);
+ napi_disable(&mal->napi);
}
void mal_poll_enable(struct mal_instance *mal, struct mal_commac *commac)
@@ -330,11 +329,11 @@ void mal_poll_enable(struct mal_instance *mal, struct mal_commac *commac)
// XXX might want to kick a poll now...
}
-static int mal_poll(struct net_device *ndev, int *budget)
+static int mal_poll(struct napi_struct *napi, int budget)
{
- struct mal_instance *mal = netdev_priv(ndev);
+ struct mal_instance *mal = container_of(napi, struct mal_instance, napi);
struct list_head *l;
- int rx_work_limit = min(ndev->quota, *budget), received = 0, done;
+ int received = 0;
unsigned long flags;
MAL_DBG2(mal, "poll(%d) %d ->" NL, *budget,
@@ -358,26 +357,21 @@ static int mal_poll(struct net_device *ndev, int *budget)
int n;
if (unlikely(test_bit(MAL_COMMAC_POLL_DISABLED, &mc->flags)))
continue;
- n = mc->ops->poll_rx(mc->dev, rx_work_limit);
+ n = mc->ops->poll_rx(mc->dev, budget);
if (n) {
received += n;
- rx_work_limit -= n;
- if (rx_work_limit <= 0) {
- done = 0;
- // XXX What if this is the last one ?
- goto more_work;
- }
+ budget -= n;
+ if (budget <= 0)
+ goto more_work; // XXX What if this is the last one ?
}
}
/* We need to disable IRQs to protect from RXDE IRQ here */
spin_lock_irqsave(&mal->lock, flags);
- __netif_rx_complete(ndev);
+ __napi_complete(napi);
mal_enable_eob_irq(mal);
spin_unlock_irqrestore(&mal->lock, flags);
- done = 1;
-
/* Check for "rotting" packet(s) */
list_for_each(l, &mal->poll_list) {
struct mal_commac *mc =
@@ -387,12 +381,12 @@ static int mal_poll(struct net_device *ndev, int *budget)
if (unlikely(mc->ops->peek_rx(mc->dev) ||
test_bit(MAL_COMMAC_RX_STOPPED, &mc->flags))) {
MAL_DBG2(mal, "rotting packet" NL);
- if (netif_rx_reschedule(ndev, received))
+ if (napi_reschedule(napi))
mal_disable_eob_irq(mal);
else
MAL_DBG2(mal, "already in poll list" NL);
- if (rx_work_limit > 0)
+ if (budget > 0)
goto again;
else
goto more_work;
@@ -401,13 +395,8 @@ static int mal_poll(struct net_device *ndev, int *budget)
}
more_work:
- ndev->quota -= received;
- *budget -= received;
-
- MAL_DBG2(mal, "poll() %d <- %d" NL, *budget,
- done ? 0 : 1);
-
- return done ? 0 : 1;
+ MAL_DBG2(mal, "poll() %d <- %d" NL, budget, received);
+ return received;
}
static void mal_reset(struct mal_instance *mal)
@@ -538,11 +527,8 @@ static int __devinit mal_probe(struct of_device *ofdev,
}
INIT_LIST_HEAD(&mal->poll_list);
- set_bit(__LINK_STATE_START, &mal->poll_dev.state);
- mal->poll_dev.weight = CONFIG_IBM_NEW_EMAC_POLL_WEIGHT;
- mal->poll_dev.poll = mal_poll;
- mal->poll_dev.priv = mal;
- atomic_set(&mal->poll_dev.refcnt, 1);
+ mal->napi.weight = CONFIG_IBM_NEW_EMAC_POLL_WEIGHT;
+ mal->napi.poll = mal_poll;
INIT_LIST_HEAD(&mal->list);
spin_lock_init(&mal->lock);
@@ -653,11 +639,8 @@ static int __devexit mal_remove(struct of_device *ofdev)
MAL_DBG(mal, "remove" NL);
- /* Syncronize with scheduled polling,
- stolen from net/core/dev.c:dev_close()
- */
- clear_bit(__LINK_STATE_START, &mal->poll_dev.state);
- netif_poll_disable(&mal->poll_dev);
+ /* Synchronize with scheduled polling */
+ napi_disable(&mal->napi);
if (!list_empty(&mal->list)) {
/* This is *very* bad */
diff --git a/drivers/net/ibm_newemac/mal.h b/drivers/net/ibm_newemac/mal.h
index 57b69dc..cb1a16d 100644
--- a/drivers/net/ibm_newemac/mal.h
+++ b/drivers/net/ibm_newemac/mal.h
@@ -197,7 +197,7 @@ struct mal_instance {
int serr_irq; /* MAL System Error IRQ */
struct list_head poll_list;
- struct net_device poll_dev;
+ struct napi_struct napi;
struct list_head list;
u32 tx_chan_mask;
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists