diff options
| author |   Roland Dreier <rolandd@cisco.com> | 2007-10-14 20:40:27 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-10-15 20:17:27 -0700 |
| commit | ab8403c424a35364a3a2c753f7c5917fcbb4d809 (patch) | |
| tree | 9cbcfbc4ae9f15b05272be1fbdc7e028b86f297e /drivers/infiniband/hw/mthca/mthca_eq.c | |
| parent | mlx4_core: Kill mlx4_write64_raw() (diff) | |
| download | linux-dev-ab8403c424a35364a3a2c753f7c5917fcbb4d809.tar.xz linux-dev-ab8403c424a35364a3a2c753f7c5917fcbb4d809.zip | |
IB/mthca: Avoid alignment traps when writing doorbells
Architectures such as ia64 see alignment traps when doing a 64-bit
read from __be32 doorbell[2] arrays to do doorbell writes in
mthca_write64(). Fix this by just passing the two halves of the
doorbell value into mthca_write64(). This actually improves the
generated code by allowing the compiler to see what's going on better.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_eq.c')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_eq.c | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c index 8592b26dc4e1..b29de51b7f35 100644 --- a/drivers/infiniband/hw/mthca/mthca_eq.c +++ b/drivers/infiniband/hw/mthca/mthca_eq.c @@ -173,11 +173,6 @@ static inline u64 async_mask(struct mthca_dev *dev) static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) { - __be32 doorbell[2]; - - doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_SET_CI | eq->eqn); - doorbell[1] = cpu_to_be32(ci & (eq->nent - 1)); - /* * This barrier makes sure that all updates to ownership bits * done by set_eqe_hw() hit memory before the consumer index @@ -187,7 +182,7 @@ static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u * having set_eqe_hw() overwrite the owner field. */ wmb(); - mthca_write64(doorbell, + mthca_write64(MTHCA_EQ_DB_SET_CI | eq->eqn, ci & (eq->nent - 1), dev->kar + MTHCA_EQ_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } @@ -212,12 +207,7 @@ static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci) static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn) { - __be32 doorbell[2]; - - doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_REQ_NOT | eqn); - doorbell[1] = 0; - - mthca_write64(doorbell, + mthca_write64(MTHCA_EQ_DB_REQ_NOT | eqn, 0, dev->kar + MTHCA_EQ_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } @@ -230,12 +220,7 @@ static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask) static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn) { if (!mthca_is_memfree(dev)) { - __be32 doorbell[2]; - - doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_DISARM_CQ | eqn); - doorbell[1] = cpu_to_be32(cqn); - - mthca_write64(doorbell, + mthca_write64(MTHCA_EQ_DB_DISARM_CQ | eqn, cqn, dev->kar + MTHCA_EQ_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } |