diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2006-05-16 01:19:52 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2006-05-16 01:19:52 +0100 |
| commit | 18594822fcb01d4b35e05b9018f770a0b4156d1a (patch) | |
| tree | 38d35c38086a564beaac215f8e52694cdbfab1c3 /drivers/infiniband/hw/mthca/mthca_provider.h | |
| parent | 5b5ffbc1e6d62d89747f3f59c09b2e488a7d7fce (diff) | |
| parent | c4694c76ce28dd7e415b4f3014d8c6e580b5f3d2 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_provider.h')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_provider.h | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.h b/drivers/infiniband/hw/mthca/mthca_provider.h index 6676a786d69..179a8f610d0 100644 --- a/drivers/infiniband/hw/mthca/mthca_provider.h +++ b/drivers/infiniband/hw/mthca/mthca_provider.h @@ -139,11 +139,12 @@ struct mthca_ah { * a qp may be locked, with the send cq locked first. No other * nesting should be done. * - * Each struct mthca_cq/qp also has an atomic_t ref count. The - * pointer from the cq/qp_table to the struct counts as one reference. - * This reference also is good for access through the consumer API, so - * modifying the CQ/QP etc doesn't need to take another reference. - * Access because of a completion being polled does need a reference. + * Each struct mthca_cq/qp also has an ref count, protected by the + * corresponding table lock. The pointer from the cq/qp_table to the + * struct counts as one reference. This reference also is good for + * access through the consumer API, so modifying the CQ/QP etc doesn't + * need to take another reference. Access to a QP because of a + * completion being polled does not need a reference either. * * Finally, each struct mthca_cq/qp has a wait_queue_head_t for the * destroy function to sleep on. @@ -159,8 +160,9 @@ struct mthca_ah { * - decrement ref count; if zero, wake up waiters * * To destroy a CQ/QP, we can do the following: - * - lock cq/qp_table, remove pointer, unlock cq/qp_table lock - * - decrement ref count + * - lock cq/qp_table + * - remove pointer and decrement ref count + * - unlock cq/qp_table lock * - wait_event until ref count is zero * * It is the consumer's responsibilty to make sure that no QP @@ -197,7 +199,7 @@ struct mthca_cq_resize { struct mthca_cq { struct ib_cq ibcq; spinlock_t lock; - atomic_t refcount; + int refcount; int cqn; u32 cons_index; struct mthca_cq_buf buf; @@ -217,7 +219,7 @@ struct mthca_cq { struct mthca_srq { struct ib_srq ibsrq; spinlock_t lock; - atomic_t refcount; + int refcount; int srqn; int max; int max_gs; @@ -254,7 +256,7 @@ struct mthca_wq { struct mthca_qp { struct ib_qp ibqp; - atomic_t refcount; + int refcount; u32 qpn; int is_direct; u8 port; /* for SQP and memfree use only */ |