aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/intel
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2018-11-11 17:57:54 -0800
committerDavid S. Miller <davem@davemloft.net>2018-11-11 17:57:54 -0800
commit2b9b7502dfcb6169dbf3359702953bf756b4e273 (patch)
tree58ab22096d49de6a0e049cf1267edc34b82916dc /drivers/net/ethernet/intel
parentPCI: add USR vendor id and use it in r8169 and w6692 driver (diff)
parentLinux 4.20-rc2 (diff)
downloadlinux-dev-2b9b7502dfcb6169dbf3359702953bf756b4e273.tar.xz
linux-dev-2b9b7502dfcb6169dbf3359702953bf756b4e273.zip
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'drivers/net/ethernet/intel')
-rw-r--r--drivers/net/ethernet/intel/i40e/i40e_main.c8
-rw-r--r--drivers/net/ethernet/intel/ice/ice.h4
-rw-r--r--drivers/net/ethernet/intel/ice/ice_common.c3
-rw-r--r--drivers/net/ethernet/intel/ice/ice_ethtool.c7
-rw-r--r--drivers/net/ethernet/intel/ice/ice_hw_autogen.h2
-rw-r--r--drivers/net/ethernet/intel/ice/ice_lib.c3
-rw-r--r--drivers/net/ethernet/intel/ice/ice_main.c86
-rw-r--r--drivers/net/ethernet/intel/ice/ice_switch.c12
-rw-r--r--drivers/net/ethernet/intel/ice/ice_switch.h2
-rw-r--r--drivers/net/ethernet/intel/ice/ice_txrx.c11
-rw-r--r--drivers/net/ethernet/intel/ice/ice_txrx.h17
-rw-r--r--drivers/net/ethernet/intel/ice/ice_type.h2
-rw-r--r--drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c4
-rw-r--r--drivers/net/ethernet/intel/igb/igb_ptp.c12
14 files changed, 113 insertions, 60 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index bc71a21c1dc2..21c2688d6308 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -12249,6 +12249,8 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
NETIF_F_GSO_GRE |
NETIF_F_GSO_GRE_CSUM |
NETIF_F_GSO_PARTIAL |
+ NETIF_F_GSO_IPXIP4 |
+ NETIF_F_GSO_IPXIP6 |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_SCTP_CRC |
@@ -12266,13 +12268,13 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
/* record features VLANs can make use of */
netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;
- if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
- netdev->hw_features |= NETIF_F_NTUPLE | NETIF_F_HW_TC;
-
hw_features = hw_enc_features |
NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_CTAG_RX;
+ if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
+ hw_features |= NETIF_F_NTUPLE | NETIF_F_HW_TC;
+
netdev->hw_features |= hw_features;
netdev->features |= hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 4c4b5717a627..b8548370f1c7 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -76,6 +76,8 @@ extern const char ice_drv_ver[];
#define ICE_MIN_INTR_PER_VF (ICE_MIN_QS_PER_VF + 1)
#define ICE_DFLT_INTR_PER_VF (ICE_DFLT_QS_PER_VF + 1)
+#define ICE_MAX_RESET_WAIT 20
+
#define ICE_VSIQF_HKEY_ARRAY_SIZE ((VSIQF_HKEY_MAX_INDEX + 1) * 4)
#define ICE_DFLT_NETIF_M (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
@@ -189,7 +191,6 @@ struct ice_vsi {
u64 tx_linearize;
DECLARE_BITMAP(state, __ICE_STATE_NBITS);
DECLARE_BITMAP(flags, ICE_VSI_FLAG_NBITS);
- unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
unsigned int current_netdev_flags;
u32 tx_restart;
u32 tx_busy;
@@ -369,5 +370,6 @@ int ice_set_rss(struct ice_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size);
int ice_get_rss(struct ice_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size);
void ice_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size);
void ice_print_link_msg(struct ice_vsi *vsi, bool isup);
+void ice_napi_del(struct ice_vsi *vsi);
#endif /* _ICE_H_ */
diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 8cd6a2401fd9..554fd707a6d6 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -811,6 +811,9 @@ void ice_deinit_hw(struct ice_hw *hw)
/* Attempt to disable FW logging before shutting down control queues */
ice_cfg_fw_log(hw, false);
ice_shutdown_all_ctrlq(hw);
+
+ /* Clear VSI contexts if not already cleared */
+ ice_clear_all_vsi_ctx(hw);
}
/**
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index 96923580f2a6..648acdb4c644 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -1517,10 +1517,15 @@ ice_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause)
}
if (!test_bit(__ICE_DOWN, pf->state)) {
- /* Give it a little more time to try to come back */
+ /* Give it a little more time to try to come back. If still
+ * down, restart autoneg link or reinitialize the interface.
+ */
msleep(75);
if (!test_bit(__ICE_DOWN, pf->state))
return ice_nway_reset(netdev);
+
+ ice_down(vsi);
+ ice_up(vsi);
}
return err;
diff --git a/drivers/net/ethernet/intel/ice/ice_hw_autogen.h b/drivers/net/ethernet/intel/ice/ice_hw_autogen.h
index 5fdea6ec7675..596b9fb1c510 100644
--- a/drivers/net/ethernet/intel/ice/ice_hw_autogen.h
+++ b/drivers/net/ethernet/intel/ice/ice_hw_autogen.h
@@ -242,6 +242,8 @@
#define GLNVM_ULD 0x000B6008
#define GLNVM_ULD_CORER_DONE_M BIT(3)
#define GLNVM_ULD_GLOBR_DONE_M BIT(4)
+#define GLPCI_CNF2 0x000BE004
+#define GLPCI_CNF2_CACHELINE_SIZE_M BIT(1)
#define PF_FUNC_RID 0x0009E880
#define PF_FUNC_RID_FUNC_NUM_S 0
#define PF_FUNC_RID_FUNC_NUM_M ICE_M(0x7, 0)
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 5bacad01f0c9..1041fa2a7767 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -1997,7 +1997,7 @@ int ice_cfg_vlan_pruning(struct ice_vsi *vsi, bool ena)
status = ice_update_vsi(&vsi->back->hw, vsi->idx, ctxt, NULL);
if (status) {
netdev_err(vsi->netdev, "%sabling VLAN pruning on VSI handle: %d, VSI HW ID: %d failed, err = %d, aq_err = %d\n",
- ena ? "Ena" : "Dis", vsi->idx, vsi->vsi_num, status,
+ ena ? "En" : "Dis", vsi->idx, vsi->vsi_num, status,
vsi->back->hw.adminq.sq_last_status);
goto err_out;
}
@@ -2458,6 +2458,7 @@ int ice_vsi_release(struct ice_vsi *vsi)
* on this wq
*/
if (vsi->netdev && !ice_is_reset_in_progress(pf->state)) {
+ ice_napi_del(vsi);
unregister_netdev(vsi->netdev);
free_netdev(vsi->netdev);
vsi->netdev = NULL;
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 05993451147a..333312a1d595 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -1465,7 +1465,7 @@ skip_req_irq:
* ice_napi_del - Remove NAPI handler for the VSI
* @vsi: VSI for which NAPI handler is to be removed
*/
-static void ice_napi_del(struct ice_vsi *vsi)
+void ice_napi_del(struct ice_vsi *vsi)
{
int v_idx;
@@ -1622,7 +1622,6 @@ static int ice_vlan_rx_add_vid(struct net_device *netdev,
{
struct ice_netdev_priv *np = netdev_priv(netdev);
struct ice_vsi *vsi = np->vsi;
- int ret;
if (vid >= VLAN_N_VID) {
netdev_err(netdev, "VLAN id requested %d is out of range %d\n",
@@ -1635,7 +1634,8 @@ static int ice_vlan_rx_add_vid(struct net_device *netdev,
/* Enable VLAN pruning when VLAN 0 is added */
if (unlikely(!vid)) {
- ret = ice_cfg_vlan_pruning(vsi, true);
+ int ret = ice_cfg_vlan_pruning(vsi, true);
+
if (ret)
return ret;
}
@@ -1644,12 +1644,7 @@ static int ice_vlan_rx_add_vid(struct net_device *netdev,
* needed to continue allowing all untagged packets since VLAN prune
* list is applied to all packets by the switch
*/
- ret = ice_vsi_add_vlan(vsi, vid);
-
- if (!ret)
- set_bit(vid, vsi->active_vlans);
-
- return ret;
+ return ice_vsi_add_vlan(vsi, vid);
}
/**
@@ -1677,8 +1672,6 @@ static int ice_vlan_rx_kill_vid(struct net_device *netdev,
if (status)
return status;
- clear_bit(vid, vsi->active_vlans);
-
/* Disable VLAN pruning when VLAN 0 is removed */
if (unlikely(!vid))
status = ice_cfg_vlan_pruning(vsi, false);
@@ -2002,6 +1995,22 @@ static int ice_init_interrupt_scheme(struct ice_pf *pf)
}
/**
+ * ice_verify_cacheline_size - verify driver's assumption of 64 Byte cache lines
+ * @pf: pointer to the PF structure
+ *
+ * There is no error returned here because the driver should be able to handle
+ * 128 Byte cache lines, so we only print a warning in case issues are seen,
+ * specifically with Tx.
+ */
+static void ice_verify_cacheline_size(struct ice_pf *pf)
+{
+ if (rd32(&pf->hw, GLPCI_CNF2) & GLPCI_CNF2_CACHELINE_SIZE_M)
+ dev_warn(&pf->pdev->dev,
+ "%d Byte cache line assumption is invalid, driver may have Tx timeouts!\n",
+ ICE_CACHE_LINE_BYTES);
+}
+
+/**
* ice_probe - Device initialization routine
* @pdev: PCI device information struct
* @ent: entry in ice_pci_tbl
@@ -2151,6 +2160,8 @@ static int ice_probe(struct pci_dev *pdev,
/* since everything is good, start the service timer */
mod_timer(&pf->serv_tmr, round_jiffies(jiffies + pf->serv_tmr_period));
+ ice_verify_cacheline_size(pf);
+
return 0;
err_alloc_sw_unroll:
@@ -2182,6 +2193,12 @@ static void ice_remove(struct pci_dev *pdev)
if (!pf)
return;
+ for (i = 0; i < ICE_MAX_RESET_WAIT; i++) {
+ if (!ice_is_reset_in_progress(pf->state))
+ break;
+ msleep(100);
+ }
+
set_bit(__ICE_DOWN, pf->state);
ice_service_task_stop(pf);
@@ -2510,31 +2527,6 @@ static int ice_vsi_vlan_setup(struct ice_vsi *vsi)
}
/**
- * ice_restore_vlan - Reinstate VLANs when vsi/netdev comes back up
- * @vsi: the VSI being brought back up
- */
-static int ice_restore_vlan(struct ice_vsi *vsi)
-{
- int err;
- u16 vid;
-
- if (!vsi->netdev)
- return -EINVAL;
-
- err = ice_vsi_vlan_setup(vsi);
- if (err)
- return err;
-
- for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID) {
- err = ice_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q), vid);
- if (err)
- break;
- }
-
- return err;
-}
-
-/**
* ice_vsi_cfg - Setup the VSI
* @vsi: the VSI being configured
*
@@ -2546,7 +2538,9 @@ static int ice_vsi_cfg(struct ice_vsi *vsi)
if (vsi->netdev) {
ice_set_rx_mode(vsi->netdev);
- err = ice_restore_vlan(vsi);
+
+ err = ice_vsi_vlan_setup(vsi);
+
if (err)
return err;
}
@@ -3296,7 +3290,7 @@ static void ice_rebuild(struct ice_pf *pf)
struct device *dev = &pf->pdev->dev;
struct ice_hw *hw = &pf->hw;
enum ice_status ret;
- int err;
+ int err, i;
if (test_bit(__ICE_DOWN, pf->state))
goto clear_recovery;
@@ -3370,6 +3364,22 @@ static void ice_rebuild(struct ice_pf *pf)
}
ice_reset_all_vfs(pf, true);
+
+ for (i = 0; i < pf->num_alloc_vsi; i++) {
+ bool link_up;
+
+ if (!pf->vsi[i] || pf->vsi[i]->type != ICE_VSI_PF)
+ continue;
+ ice_get_link_status(pf->vsi[i]->port_info, &link_up);
+ if (link_up) {
+ netif_carrier_on(pf->vsi[i]->netdev);
+ netif_tx_wake_all_queues(pf->vsi[i]->netdev);
+ } else {
+ netif_carrier_off(pf->vsi[i]->netdev);
+ netif_tx_stop_all_queues(pf->vsi[i]->netdev);
+ }
+ }
+
/* if we get here, reset flow is successful */
clear_bit(__ICE_RESET_FAILED, pf->state);
return;
diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
index 33403f39f1b3..40c9c6558956 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.c
+++ b/drivers/net/ethernet/intel/ice/ice_switch.c
@@ -348,6 +348,18 @@ static void ice_clear_vsi_ctx(struct ice_hw *hw, u16 vsi_handle)
}
/**
+ * ice_clear_all_vsi_ctx - clear all the VSI context entries
+ * @hw: pointer to the hw struct
+ */
+void ice_clear_all_vsi_ctx(struct ice_hw *hw)
+{
+ u16 i;
+
+ for (i = 0; i < ICE_MAX_VSI; i++)
+ ice_clear_vsi_ctx(hw, i);
+}
+
+/**
* ice_add_vsi - add VSI context to the hardware and VSI handle list
* @hw: pointer to the hw struct
* @vsi_handle: unique VSI handle provided by drivers
diff --git a/drivers/net/ethernet/intel/ice/ice_switch.h b/drivers/net/ethernet/intel/ice/ice_switch.h
index b88d96a1ef69..d5ef0bd58bf9 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.h
+++ b/drivers/net/ethernet/intel/ice/ice_switch.h
@@ -190,6 +190,8 @@ ice_update_vsi(struct ice_hw *hw, u16 vsi_handle, struct ice_vsi_ctx *vsi_ctx,
struct ice_sq_cd *cd);
bool ice_is_vsi_valid(struct ice_hw *hw, u16 vsi_handle);
struct ice_vsi_ctx *ice_get_vsi_ctx(struct ice_hw *hw, u16 vsi_handle);
+void ice_clear_all_vsi_ctx(struct ice_hw *hw);
+/* Switch config */
enum ice_status ice_get_initial_sw_cfg(struct ice_hw *hw);
/* Switch/bridge related commands */
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c
index 5dae968d853e..fe5bbabbb41e 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -1520,7 +1520,7 @@ int ice_tso(struct ice_tx_buf *first, struct ice_tx_offload_params *off)
/* update gso_segs and bytecount */
first->gso_segs = skb_shinfo(skb)->gso_segs;
- first->bytecount = (first->gso_segs - 1) * off->header_len;
+ first->bytecount += (first->gso_segs - 1) * off->header_len;
cd_tso_len = skb->len - off->header_len;
cd_mss = skb_shinfo(skb)->gso_size;
@@ -1556,15 +1556,15 @@ int ice_tso(struct ice_tx_buf *first, struct ice_tx_offload_params *off)
* magnitude greater than our largest possible GSO size.
*
* This would then be implemented as:
- * return (((size >> 12) * 85) >> 8) + 1;
+ * return (((size >> 12) * 85) >> 8) + ICE_DESCS_FOR_SKB_DATA_PTR;
*
* Since multiplication and division are commutative, we can reorder
* operations into:
- * return ((size * 85) >> 20) + 1;
+ * return ((size * 85) >> 20) + ICE_DESCS_FOR_SKB_DATA_PTR;
*/
static unsigned int ice_txd_use_count(unsigned int size)
{
- return ((size * 85) >> 20) + 1;
+ return ((size * 85) >> 20) + ICE_DESCS_FOR_SKB_DATA_PTR;
}
/**
@@ -1706,7 +1706,8 @@ ice_xmit_frame_ring(struct sk_buff *skb, struct ice_ring *tx_ring)
* + 1 desc for context descriptor,
* otherwise try next time
*/
- if (ice_maybe_stop_tx(tx_ring, count + 4 + 1)) {
+ if (ice_maybe_stop_tx(tx_ring, count + ICE_DESCS_PER_CACHE_LINE +
+ ICE_DESCS_FOR_CTX_DESC)) {
tx_ring->tx_stats.tx_busy++;
return NETDEV_TX_BUSY;
}
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h
index 1d0f58bd389b..75d0eaf6c9dd 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.h
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.h
@@ -22,8 +22,21 @@
#define ICE_RX_BUF_WRITE 16 /* Must be power of 2 */
#define ICE_MAX_TXQ_PER_TXQG 128
-/* Tx Descriptors needed, worst case */
-#define DESC_NEEDED (MAX_SKB_FRAGS + 4)
+/* We are assuming that the cache line is always 64 Bytes here for ice.
+ * In order to make sure that is a correct assumption there is a check in probe
+ * to print a warning if the read from GLPCI_CNF2 tells us that the cache line
+ * size is 128 bytes. We do it this way because we do not want to read the
+ * GLPCI_CNF2 register or a variable containing the value on every pass through
+ * the Tx path.
+ */
+#define ICE_CACHE_LINE_BYTES 64
+#define ICE_DESCS_PER_CACHE_LINE (ICE_CACHE_LINE_BYTES / \
+ sizeof(struct ice_tx_desc))
+#define ICE_DESCS_FOR_CTX_DESC 1
+#define ICE_DESCS_FOR_SKB_DATA_PTR 1
+/* Tx descriptors needed, worst case */
+#define DESC_NEEDED (MAX_SKB_FRAGS + ICE_DESCS_FOR_CTX_DESC + \
+ ICE_DESCS_PER_CACHE_LINE + ICE_DESCS_FOR_SKB_DATA_PTR)
#define ICE_DESC_UNUSED(R) \
((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
(R)->next_to_clean - (R)->next_to_use - 1)
diff --git a/drivers/net/ethernet/intel/ice/ice_type.h b/drivers/net/ethernet/intel/ice/ice_type.h
index 12f9432abf11..f4dbc81c1988 100644
--- a/drivers/net/ethernet/intel/ice/ice_type.h
+++ b/drivers/net/ethernet/intel/ice/ice_type.h
@@ -92,12 +92,12 @@ struct ice_link_status {
u64 phy_type_low;
u16 max_frame_size;
u16 link_speed;
+ u16 req_speeds;
u8 lse_ena; /* Link Status Event notification */
u8 link_info;
u8 an_info;
u8 ext_info;
u8 pacing;
- u8 req_speeds;
/* Refer to #define from module_type[ICE_MODULE_TYPE_TOTAL_BYTE] of
* ice_aqc_get_phy_caps structure
*/
diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
index 45f10f8f01dc..e71065f9d391 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
@@ -348,7 +348,7 @@ static int ice_vsi_set_pvid(struct ice_vsi *vsi, u16 vid)
struct ice_vsi_ctx ctxt = { 0 };
enum ice_status status;
- ctxt.info.vlan_flags = ICE_AQ_VSI_VLAN_MODE_TAGGED |
+ ctxt.info.vlan_flags = ICE_AQ_VSI_VLAN_MODE_UNTAGGED |
ICE_AQ_VSI_PVLAN_INSERT_PVID |
ICE_AQ_VSI_VLAN_EMOD_STR;
ctxt.info.pvid = cpu_to_le16(vid);
@@ -2171,7 +2171,6 @@ static int ice_vc_process_vlan_msg(struct ice_vf *vf, u8 *msg, bool add_v)
if (!ice_vsi_add_vlan(vsi, vid)) {
vf->num_vlan++;
- set_bit(vid, vsi->active_vlans);
/* Enable VLAN pruning when VLAN 0 is added */
if (unlikely(!vid))
@@ -2190,7 +2189,6 @@ static int ice_vc_process_vlan_msg(struct ice_vf *vf, u8 *msg, bool add_v)
*/
if (!ice_vsi_kill_vlan(vsi, vid)) {
vf->num_vlan--;
- clear_bit(vid, vsi->active_vlans);
/* Disable VLAN pruning when removing VLAN 0 */
if (unlikely(!vid))
diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c
index 8c1833a157d3..fd3071f55bd3 100644
--- a/drivers/net/ethernet/intel/igb/igb_ptp.c
+++ b/drivers/net/ethernet/intel/igb/igb_ptp.c
@@ -53,13 +53,15 @@
* 2^40 * 10^-9 / 60 = 18.3 minutes.
*
* SYSTIM is converted to real time using a timecounter. As
- * timecounter_cyc2time() allows old timestamps, the timecounter
- * needs to be updated at least once per half of the SYSTIM interval.
- * Scheduling of delayed work is not very accurate, so we aim for 8
- * minutes to be sure the actual interval is shorter than 9.16 minutes.
+ * timecounter_cyc2time() allows old timestamps, the timecounter needs
+ * to be updated at least once per half of the SYSTIM interval.
+ * Scheduling of delayed work is not very accurate, and also the NIC
+ * clock can be adjusted to run up to 6% faster and the system clock
+ * up to 10% slower, so we aim for 6 minutes to be sure the actual
+ * interval in the NIC time is shorter than 9.16 minutes.
*/
-#define IGB_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 8)
+#define IGB_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 6)
#define IGB_PTP_TX_TIMEOUT (HZ * 15)
#define INCPERIOD_82576 BIT(E1000_TIMINCA_16NS_SHIFT)
#define INCVALUE_82576_MASK GENMASK(E1000_TIMINCA_16NS_SHIFT - 1, 0)