diff options
Diffstat (limited to 'drivers/net/enic/vnic_dev.c')
| -rw-r--r-- | drivers/net/enic/vnic_dev.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c index 68f24ae860ae..8c4c8cf486f6 100644 --- a/drivers/net/enic/vnic_dev.c +++ b/drivers/net/enic/vnic_dev.c @@ -40,6 +40,12 @@ struct vnic_res { unsigned int count; }; +struct vnic_intr_coal_timer_info { + u32 mul; + u32 div; + u32 max_usec; +}; + struct vnic_dev { void *priv; struct pci_dev *pdev; @@ -58,6 +64,7 @@ struct vnic_dev { enum vnic_proxy_type proxy; u32 proxy_index; u64 args[VNIC_DEVCMD_NARGS]; + struct vnic_intr_coal_timer_info intr_coal_timer_info; }; #define VNIC_MAX_RES_HDR_SIZE \ @@ -794,6 +801,42 @@ int vnic_dev_deinit(struct vnic_dev *vdev) return vnic_dev_cmd(vdev, CMD_DEINIT, &a0, &a1, wait); } +void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev) +{ + /* Default: hardware intr coal timer is in units of 1.5 usecs */ + vdev->intr_coal_timer_info.mul = 2; + vdev->intr_coal_timer_info.div = 3; + vdev->intr_coal_timer_info.max_usec = + vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff); +} + +int vnic_dev_intr_coal_timer_info(struct vnic_dev *vdev) +{ + int wait = 1000; + int err; + + memset(vdev->args, 0, sizeof(vdev->args)); + + err = _vnic_dev_cmd(vdev, CMD_INTR_COAL_CONVERT, wait); + + /* Use defaults when firmware doesn't support the devcmd at all or + * supports it for only specific hardware + */ + if ((err == ERR_ECMDUNKNOWN) || + (!err && !(vdev->args[0] && vdev->args[1] && vdev->args[2]))) { + pr_warning("Using default conversion factor for " + "interrupt coalesce timer\n"); + vnic_dev_intr_coal_timer_info_default(vdev); + return 0; + } + + vdev->intr_coal_timer_info.mul = (u32) vdev->args[0]; + vdev->intr_coal_timer_info.div = (u32) vdev->args[1]; + vdev->intr_coal_timer_info.max_usec = (u32) vdev->args[2]; + + return err; +} + int vnic_dev_link_status(struct vnic_dev *vdev) { if (!vnic_dev_notify_ready(vdev)) @@ -838,6 +881,23 @@ enum vnic_dev_intr_mode vnic_dev_get_intr_mode( return vdev->intr_mode; } +u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec) +{ + return (usec * vdev->intr_coal_timer_info.mul) / + vdev->intr_coal_timer_info.div; +} + +u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles) +{ + return (hw_cycles * vdev->intr_coal_timer_info.div) / + vdev->intr_coal_timer_info.mul; +} + +u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev) +{ + return vdev->intr_coal_timer_info.max_usec; +} + void vnic_dev_unregister(struct vnic_dev *vdev) { if (vdev) { |