diff options
| author | Govindarajulu Varadarajan <_govind@gmx.com> | 2015-08-25 14:15:11 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-25 16:05:48 -0700 |
| commit | dafc21995db9b2ef61a2d613f872a5c565731548 (patch) | |
| tree | 4c0865ec610b03682abf74f884bcf63dfe04de25 | |
| parent | 6e85d5ad36a26debc23a9a865c029cbe242b2dc8 (diff) | |
| download | linux-dafc21995db9b2ef61a2d613f872a5c565731548.tar.bz2 | |
enic: reduce ioread in devcmd2
posted_index is RO in firmware. We need not do ioread everytime to get
posted index. Store posted index locally.
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/vnic_dev.c | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/vnic_wq.h | 1 |
2 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.c b/drivers/net/ethernet/cisco/enic/vnic_dev.c index 19a49a6e3911..a3badefaf360 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_dev.c +++ b/drivers/net/ethernet/cisco/enic/vnic_dev.c @@ -301,12 +301,12 @@ static int _vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, struct devcmd2_result *result = dc2c->result + dc2c->next_result; unsigned int i; int delay, err; - u32 fetch_index, posted, new_posted; + u32 fetch_index, new_posted; + u32 posted = dc2c->posted; - posted = ioread32(&dc2c->wq_ctrl->posted_index); fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index); - if (posted == 0xFFFFFFFF || fetch_index == 0xFFFFFFFF) + if (fetch_index == 0xFFFFFFFF) return -ENODEV; new_posted = (posted + 1) % DEVCMD2_RING_SIZE; @@ -331,6 +331,7 @@ static int _vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, */ wmb(); iowrite32(new_posted, &dc2c->wq_ctrl->posted_index); + dc2c->posted = new_posted; if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT) return 0; @@ -402,6 +403,7 @@ static int vnic_dev_init_devcmd2(struct vnic_dev *vdev) enic_wq_init_start(&vdev->devcmd2->wq, 0, fetch_index, fetch_index, 0, 0); + vdev->devcmd2->posted = fetch_index; vnic_wq_enable(&vdev->devcmd2->wq); err = vnic_dev_alloc_desc_ring(vdev, &vdev->devcmd2->results_ring, diff --git a/drivers/net/ethernet/cisco/enic/vnic_wq.h b/drivers/net/ethernet/cisco/enic/vnic_wq.h index 8944af935a60..01209613d57d 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_wq.h +++ b/drivers/net/ethernet/cisco/enic/vnic_wq.h @@ -97,6 +97,7 @@ struct devcmd2_controller { int color; struct vnic_dev_ring results_ring; struct vnic_wq wq; + u32 posted; }; static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq) |