diff options
Diffstat (limited to 'drivers/net/vxge/vxge-config.c')
| -rw-r--r-- | drivers/net/vxge/vxge-config.c | 86 |
1 files changed, 83 insertions, 3 deletions
diff --git a/drivers/net/vxge/vxge-config.c b/drivers/net/vxge/vxge-config.c index 0a35ab1ee2e..212e301bdd6 100644 --- a/drivers/net/vxge/vxge-config.c +++ b/drivers/net/vxge/vxge-config.c @@ -193,6 +193,88 @@ static enum vxge_hw_status __vxge_hw_vpath_xmac_rx_stats_get(struct __vxge_hw_virtualpath *vpath, struct vxge_hw_xmac_vpath_rx_stats *vpath_rx_stats); +static void +vxge_hw_vpath_set_zero_rx_frm_len(struct vxge_hw_vpath_reg __iomem *vp_reg) +{ + u64 val64; + + val64 = readq(&vp_reg->rxmac_vcfg0); + val64 &= ~VXGE_HW_RXMAC_VCFG0_RTS_MAX_FRM_LEN(0x3fff); + writeq(val64, &vp_reg->rxmac_vcfg0); + val64 = readq(&vp_reg->rxmac_vcfg0); + + return; +} + +/* + * vxge_hw_vpath_wait_receive_idle - Wait for Rx to become idle + */ +int vxge_hw_vpath_wait_receive_idle(struct __vxge_hw_device *hldev, u32 vp_id) +{ + struct vxge_hw_vpath_reg __iomem *vp_reg; + struct __vxge_hw_virtualpath *vpath; + u64 val64, rxd_count, rxd_spat; + int count = 0, total_count = 0; + + vpath = &hldev->virtual_paths[vp_id]; + vp_reg = vpath->vp_reg; + + vxge_hw_vpath_set_zero_rx_frm_len(vp_reg); + + /* Check that the ring controller for this vpath has enough free RxDs + * to send frames to the host. This is done by reading the + * PRC_RXD_DOORBELL_VPn register and comparing the read value to the + * RXD_SPAT value for the vpath. + */ + val64 = readq(&vp_reg->prc_cfg6); + rxd_spat = VXGE_HW_PRC_CFG6_GET_RXD_SPAT(val64) + 1; + /* Use a factor of 2 when comparing rxd_count against rxd_spat for some + * leg room. + */ + rxd_spat *= 2; + + do { + mdelay(1); + + rxd_count = readq(&vp_reg->prc_rxd_doorbell); + + /* Check that the ring controller for this vpath does + * not have any frame in its pipeline. + */ + val64 = readq(&vp_reg->frm_in_progress_cnt); + if ((rxd_count <= rxd_spat) || (val64 > 0)) + count = 0; + else + count++; + total_count++; + } while ((count < VXGE_HW_MIN_SUCCESSIVE_IDLE_COUNT) && + (total_count < VXGE_HW_MAX_POLLING_COUNT)); + + if (total_count >= VXGE_HW_MAX_POLLING_COUNT) + printk(KERN_ALERT "%s: Still Receiving traffic. Abort wait\n", + __func__); + + return total_count; +} + +/* vxge_hw_device_wait_receive_idle - This function waits until all frames + * stored in the frame buffer for each vpath assigned to the given + * function (hldev) have been sent to the host. + */ +void vxge_hw_device_wait_receive_idle(struct __vxge_hw_device *hldev) +{ + int i, total_count = 0; + + for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) { + if (!(hldev->vpaths_deployed & vxge_mBIT(i))) + continue; + + total_count += vxge_hw_vpath_wait_receive_idle(hldev, i); + if (total_count >= VXGE_HW_MAX_POLLING_COUNT) + break; + } +} + /* * __vxge_hw_channel_allocate - Allocate memory for channel * This function allocates required memory for the channel and various arrays @@ -390,7 +472,7 @@ __vxge_hw_device_register_poll(void __iomem *reg, u64 mask, u32 max_millis) return ret; } - /* __vxge_hw_device_vpath_reset_in_prog_check - Check if vpath reset +/* __vxge_hw_device_vpath_reset_in_prog_check - Check if vpath reset * in progress * This routine checks the vpath reset in progress register is turned zero */ @@ -1165,7 +1247,6 @@ exit: * It can be used to set or reset Pause frame generation or reception * support of the NIC. */ - enum vxge_hw_status vxge_hw_device_setpause_data(struct __vxge_hw_device *hldev, u32 port, u32 tx, u32 rx) { @@ -1409,7 +1490,6 @@ exit: /* * __vxge_hw_ring_create - Create a Ring * This function creates Ring and initializes it. - * */ static enum vxge_hw_status __vxge_hw_ring_create(struct __vxge_hw_vpath_handle *vp, |