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merge in 2 buf_ring helper routines for enqueueing and freeing buf_rings

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This commit is contained in:
Kip Macy 2008-12-17 04:00:43 +00:00
parent 096f3ce0c9
commit 1635d9171c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=186207
2 changed files with 29 additions and 1 deletions
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27
sys/net/if_var.h
View File

@ -77,6 +77,7 @@ struct ifvlantrunk;
#ifdef _KERNEL
#include <sys/mbuf.h>
#include <sys/eventhandler.h>
#include <sys/buf_ring.h>
#endif /* _KERNEL */
#include <sys/lock.h> /* XXX */
#include <sys/mutex.h> /* XXX */
@ -548,6 +549,32 @@ do { \
IFQ_PURGE(ifq); \
} while (0)
#ifdef _KERNEL
static __inline int
drbr_enqueue(struct buf_ring *br, struct mbuf *m)
{
int error = 0;
if ((error = buf_ring_enqueue(br, m)) == ENOBUFS) {
br->br_drops++;
m_freem(m);
}
return (error);
}
static __inline void
drbr_free(struct buf_ring *br, struct malloc_type *type)
{
struct mbuf *m;
while ((m = buf_ring_dequeue_sc(br)) != NULL)
m_freem(m);
buf_ring_free(br, type);
}
#endif
/*
* 72 was chosen below because it is the size of a TCP/IP
* header (40) + the minimum mss (32).

3
sys/sys/buf_ring.h
View File

@ -48,10 +48,11 @@ struct buf_ring {
volatile uint32_t br_prod_tail;
int br_prod_size;
int br_prod_mask;
uint64_t br_drops;
/*
* Pad out to next L2 cache line
*/
uint64_t _pad0[14];
uint64_t _pad0[13];
volatile uint32_t br_cons_head;
volatile uint32_t br_cons_tail;