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 <_gov...@gmx.com>
---
drivers/net/ethernet/cisco/enic/vnic_dev.c | 8 +++++---
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 19a49a6..a5fc073 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);
+ dc2c->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 8944af9..0120961 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)
--
2.5.0
--
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