i40e: Delete unused and useless i40e_pf fields

Removed fields:
.fc_autoneg_status
    Since commit c56999f ("i40e/i40evf: Add set_fc and init of
    FC settings") write-only and otherwise unused
.eeprom_version
    Write-only and otherwise unused
.atr_sample_rate
    Has only one possible value (I40E_DEFAULT_ATR_SAMPLE_RATE). Remove
    it and replace its occurrences by I40E_DEFAULT_ATR_SAMPLE_RATE
.adminq_work_limit
    Has only one possible value (I40E_AQ_WORK_LIMIT). Remove it and
    replace its occurrences by I40E_AQ_WORK_LIMIT
.tx_sluggish_count
    Unused, never written
.pf_seid
    Used to store VSI downlink seid and it is referenced only once
    in the same codepath. There is no need to save it into i40e_pf.
    Remove it and use downlink_seid directly in the mentioned log
    message.
.instance
    Write only. Remove it as well as ugly static local variable
    'pfs_found' in i40e_probe.
.int_policy
.switch_kobj
.ptp_pps_work
.ptp_extts1_work
.ptp_pps_start
.pps_delay
.ptp_pin
.override_q_count
    All these unused at all

Prior the patch:
pahole -Ci40e_pf drivers/net/ethernet/intel/i40e/i40e.ko | tail -5
        /* size: 5368, cachelines: 84, members: 127 */
        /* sum members: 5297, holes: 20, sum holes: 71 */
        /* paddings: 6, sum paddings: 19 */
        /* last cacheline: 56 bytes */
};

After the patch:
pahole -Ci40e_pf drivers/net/ethernet/intel/i40e/i40e.ko | tail -5
        /* size: 4976, cachelines: 78, members: 112 */
        /* sum members: 4905, holes: 17, sum holes: 71 */
        /* paddings: 6, sum paddings: 19 */
        /* last cacheline: 48 bytes */
};

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Author: ivecera

drivers/net/ethernet/intel/i40e/i40e.h

@@ -468,9 +468,7 @@ struct i40e_pf {
 	struct i40e_hw hw;
 	DECLARE_BITMAP(state, __I40E_STATE_SIZE__);
 	struct msix_entry *msix_entries;
-	bool fc_autoneg_status;
 
-	u16 eeprom_version;
 	u16 num_vmdq_vsis;         /* num vmdq vsis this PF has set up */
 	u16 num_vmdq_qps;          /* num queue pairs per vmdq pool */
 	u16 num_vmdq_msix;         /* num queue vectors per vmdq pool */
@@ -486,7 +484,6 @@ struct i40e_pf {
 	u16 rss_size_max;          /* HW defined max RSS queues */
 	u16 fdir_pf_filter_count;  /* num of guaranteed filters for this PF */
 	u16 num_alloc_vsi;         /* num VSIs this driver supports */
-	u8 atr_sample_rate;
 	bool wol_en;
 
 	struct hlist_head fdir_filter_list;
@@ -524,12 +521,10 @@ struct i40e_pf {
 	struct hlist_head cloud_filter_list;
 	u16 num_cloud_filters;
 
-	enum i40e_interrupt_policy int_policy;
 	u16 rx_itr_default;
 	u16 tx_itr_default;
 	u32 msg_enable;
 	char int_name[I40E_INT_NAME_STR_LEN];
-	u16 adminq_work_limit; /* num of admin receive queue desc to process */
 	unsigned long service_timer_period;
 	unsigned long service_timer_previous;
 	struct timer_list service_timer;
@@ -543,7 +538,6 @@ struct i40e_pf {
 	u32 tx_timeout_count;
 	u32 tx_timeout_recovery_level;
 	unsigned long tx_timeout_last_recovery;
-	u32 tx_sluggish_count;
 	u32 hw_csum_rx_error;
 	u32 led_status;
 	u16 corer_count; /* Core reset count */
@@ -565,17 +559,13 @@ struct i40e_pf {
 	struct i40e_lump_tracking *irq_pile;
 
 	/* switch config info */
-	u16 pf_seid;
 	u16 main_vsi_seid;
 	u16 mac_seid;
-	struct kobject *switch_kobj;
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *i40e_dbg_pf;
 #endif /* CONFIG_DEBUG_FS */
 	bool cur_promisc;
 
-	u16 instance; /* A unique number per i40e_pf instance in the system */
-
 	/* sr-iov config info */
 	struct i40e_vf *vf;
 	int num_alloc_vfs;	/* actual number of VFs allocated */
@@ -669,20 +659,15 @@ struct i40e_pf {
 	unsigned long ptp_tx_start;
 	struct hwtstamp_config tstamp_config;
 	struct timespec64 ptp_prev_hw_time;
-	struct work_struct ptp_pps_work;
 	struct work_struct ptp_extts0_work;
-	struct work_struct ptp_extts1_work;
 	ktime_t ptp_reset_start;
 	struct mutex tmreg_lock; /* Used to protect the SYSTIME registers. */
 	u32 ptp_adj_mult;
 	u32 tx_hwtstamp_timeouts;
 	u32 tx_hwtstamp_skipped;
 	u32 rx_hwtstamp_cleared;
 	u32 latch_event_flags;
-	u64 ptp_pps_start;
-	u32 pps_delay;
 	spinlock_t ptp_rx_lock; /* Used to protect Rx timestamp registers. */
-	struct ptp_pin_desc ptp_pin[3];
 	unsigned long latch_events[4];
 	bool ptp_tx;
 	bool ptp_rx;
@@ -695,7 +680,6 @@ struct i40e_pf {
 	u32 fd_inv;
 	u16 phy_led_val;
 
-	u16 override_q_count;
 	u16 last_sw_conf_flags;
 	u16 last_sw_conf_valid_flags;
 	/* List to keep previous DDP profiles to be rolled back in the future */

drivers/net/ethernet/intel/i40e/i40e_debugfs.c

@@ -1028,9 +1028,6 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
 				 "emp reset count: %d\n", pf->empr_count);
 			dev_info(&pf->pdev->dev,
 				 "pf reset count: %d\n", pf->pfr_count);
-			dev_info(&pf->pdev->dev,
-				 "pf tx sluggish count: %d\n",
-				 pf->tx_sluggish_count);
 		} else if (strncmp(&cmd_buf[5], "port", 4) == 0) {
 			struct i40e_aqc_query_port_ets_config_resp *bw_data;
 			struct i40e_dcbx_config *cfg =

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -3465,7 +3465,7 @@ static int i40e_configure_tx_ring(struct i40e_ring *ring)
 
 	/* some ATR related tx ring init */
 	if (test_bit(I40E_FLAG_FD_ATR_ENA, vsi->back->flags)) {
-		ring->atr_sample_rate = vsi->back->atr_sample_rate;
+		ring->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
 		ring->atr_count = 0;
 	} else {
 		ring->atr_sample_rate = 0;
@@ -10226,9 +10226,9 @@ static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
 				 opcode);
 			break;
 		}
-	} while (i++ < pf->adminq_work_limit);
+	} while (i++ < I40E_AQ_WORK_LIMIT);
 
-	if (i < pf->adminq_work_limit)
+	if (i < I40E_AQ_WORK_LIMIT)
 		clear_bit(__I40E_ADMINQ_EVENT_PENDING, pf->state);
 
 	/* re-enable Admin queue interrupt cause */
@@ -12769,7 +12769,6 @@ static int i40e_sw_init(struct i40e_pf *pf)
 	if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
 	    (pf->hw.func_caps.fd_filters_best_effort > 0)) {
 		set_bit(I40E_FLAG_FD_ATR_ENA, pf->flags);
-		pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
 		if (test_bit(I40E_FLAG_MFP_ENA, pf->flags) &&
 		    pf->hw.num_partitions > 1)
 			dev_info(&pf->pdev->dev,
@@ -12815,7 +12814,6 @@ static int i40e_sw_init(struct i40e_pf *pf)
 					I40E_MAX_VF_COUNT);
 	}
 #endif /* CONFIG_PCI_IOV */
-	pf->eeprom_version = 0xDEAD;
 	pf->lan_veb = I40E_NO_VEB;
 	pf->lan_vsi = I40E_NO_VSI;
 
@@ -14976,12 +14974,11 @@ static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
 		 * the PF's VSI
 		 */
 		pf->mac_seid = uplink_seid;
-		pf->pf_seid = downlink_seid;
 		pf->main_vsi_seid = seid;
 		if (printconfig)
 			dev_info(&pf->pdev->dev,
 				 "pf_seid=%d main_vsi_seid=%d\n",
-				 pf->pf_seid, pf->main_vsi_seid);
+				 downlink_seid, pf->main_vsi_seid);
 		break;
 	case I40E_SWITCH_ELEMENT_TYPE_PF:
 	case I40E_SWITCH_ELEMENT_TYPE_VF:
@@ -15160,10 +15157,6 @@ static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit, bool lock_acqui
 	/* fill in link information and enable LSE reporting */
 	i40e_link_event(pf);
 
-	/* Initialize user-specific link properties */
-	pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
-				  I40E_AQ_AN_COMPLETED) ? true : false);
-
 	i40e_ptp_init(pf);
 
 	if (!lock_acquired)
@@ -15637,7 +15630,6 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #endif /* CONFIG_I40E_DCB */
 	struct i40e_pf *pf;
 	struct i40e_hw *hw;
-	static u16 pfs_found;
 	u16 wol_nvm_bits;
 	char nvm_ver[32];
 	u16 link_status;
@@ -15715,7 +15707,6 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	hw->bus.device = PCI_SLOT(pdev->devfn);
 	hw->bus.func = PCI_FUNC(pdev->devfn);
 	hw->bus.bus_id = pdev->bus->number;
-	pf->instance = pfs_found;
 
 	/* Select something other than the 802.1ad ethertype for the
 	 * switch to use internally and drop on ingress.
@@ -15777,7 +15768,6 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 	hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
 	hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
-	pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
 
 	snprintf(pf->int_name, sizeof(pf->int_name) - 1,
 		 "%s-%s:misc",