lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

dmaengine: kill struct dma_client and supporting infrastructure

Browse Source 
All users have been converted to either the general-purpose allocator,
dma_find_channel, or dma_request_channel.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2009-01-06 11:38:17 -07:00
parent 209b84a88f
commit aa1e6f1a38
9 changed files with 17 additions and 232 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
net/core/dev.c
View File

@@ -167,25 +167,6 @@ static DEFINE_SPINLOCK(ptype_lock);
static struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
static struct list_head ptype_all __read_mostly; /* Taps */
#ifdef CONFIG_NET_DMA
struct net_dma {
struct dma_client client;
spinlock_t lock;
cpumask_t channel_mask;
struct dma_chan **channels;
};
static enum dma_state_client
netdev_dma_event(struct dma_client *client, struct dma_chan *chan,
enum dma_state state);
static struct net_dma net_dma = {
.client = {
.event_callback = netdev_dma_event,
},
};
#endif
/*
* The @dev_base_head list is protected by @dev_base_lock and the rtnl
* semaphore.
@@ -4826,81 +4807,6 @@ static int dev_cpu_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
#ifdef CONFIG_NET_DMA
/**
* netdev_dma_event - event callback for the net_dma_client
* @client: should always be net_dma_client
* @chan: DMA channel for the event
* @state: DMA state to be handled
*/
static enum dma_state_client
netdev_dma_event(struct dma_client *client, struct dma_chan *chan,
enum dma_state state)
{
int i, found = 0, pos = -1;
struct net_dma *net_dma =
container_of(client, struct net_dma, client);
enum dma_state_client ack = DMA_DUP; /* default: take no action */
spin_lock(&net_dma->lock);
switch (state) {
case DMA_RESOURCE_AVAILABLE:
for (i = 0; i < nr_cpu_ids; i++)
if (net_dma->channels[i] == chan) {
found = 1;
break;
} else if (net_dma->channels[i] == NULL && pos < 0)
pos = i;
if (!found && pos >= 0) {
ack = DMA_ACK;
net_dma->channels[pos] = chan;
cpu_set(pos, net_dma->channel_mask);
}
break;
case DMA_RESOURCE_REMOVED:
for (i = 0; i < nr_cpu_ids; i++)
if (net_dma->channels[i] == chan) {
found = 1;
pos = i;
break;
}
if (found) {
ack = DMA_ACK;
cpu_clear(pos, net_dma->channel_mask);
net_dma->channels[i] = NULL;
}
break;
default:
break;
}
spin_unlock(&net_dma->lock);
return ack;
}
/**
* netdev_dma_register - register the networking subsystem as a DMA client
*/
static int __init netdev_dma_register(void)
{
net_dma.channels = kzalloc(nr_cpu_ids * sizeof(struct net_dma),
GFP_KERNEL);
if (unlikely(!net_dma.channels)) {
printk(KERN_NOTICE
"netdev_dma: no memory for net_dma.channels\n");
return -ENOMEM;
}
spin_lock_init(&net_dma.lock);
dma_cap_set(DMA_MEMCPY, net_dma.client.cap_mask);
dmaengine_get();
return 0;
}
#else
static int __init netdev_dma_register(void) { return -ENODEV; }
#endif /* CONFIG_NET_DMA */
/**
* netdev_increment_features - increment feature set by one
@@ -5120,14 +5026,15 @@ static int __init net_dev_init(void)
if (register_pernet_device(&default_device_ops))
goto out;
netdev_dma_register();
open_softirq(NET_TX_SOFTIRQ, net_tx_action);
open_softirq(NET_RX_SOFTIRQ, net_rx_action);
hotcpu_notifier(dev_cpu_callback, 0);
dst_init();
dev_mcast_init();
#ifdef CONFIG_NET_DMA
dmaengine_get();
#endif
rc = 0;
out:
return rc;