ice: Check FDIR program status for AVF

Enable returning FDIR completion status by checking the
ctrl_vsi Rx queue descriptor value.

To enable returning FDIR completion status from ctrl_vsi Rx queue,
COMP_Queue and COMP_Report of FDIR filter programming descriptor
needs to be properly configured. After program request sent to ctrl_vsi
Tx queue, ctrl_vsi Rx queue interrupt will be triggered and
completion status will be returned.

Driver will first issue request in ice_vc_fdir_add_fltr(), then
pass FDIR context to the background task in interrupt service routine
ice_vc_fdir_irq_handler() and finally deal with them in
ice_flush_fdir_ctx(). ice_flush_fdir_ctx() will check the descriptor's
value, fdir context, and then send back virtual channel message to VF
by calling ice_vc_add_fdir_fltr_post(). An additional timer will be
setup in case of hardware interrupt timeout.

Signed-off-by: Yahui Cao <yahui.cao@intel.com>
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Tested-by: Chen Bo <BoX.C.Chen@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice.h

@@ -231,6 +231,7 @@ enum ice_state {
 	__ICE_VF_RESETS_DISABLED,	/* disable resets during ice_remove */
 	__ICE_LINK_DEFAULT_OVERRIDE_PENDING,
 	__ICE_PHY_INIT_COMPLETE,
+	__ICE_FD_VF_FLUSH_CTX,		/* set at FD Rx IRQ or timeout */
 	__ICE_STATE_NBITS		/* must be last */
 };
 

drivers/net/ethernet/intel/ice/ice_hw_autogen.h

@@ -384,6 +384,9 @@
 #define VSIQF_FD_CNT(_VSI)			(0x00464000 + ((_VSI) * 4))
 #define VSIQF_FD_CNT_FD_GCNT_S			0
 #define VSIQF_FD_CNT_FD_GCNT_M			ICE_M(0x3FFF, 0)
+#define VSIQF_FD_CNT_FD_BCNT_S			16
+#define VSIQF_FD_CNT_FD_BCNT_M			ICE_M(0x3FFF, 16)
+#define VSIQF_FD_SIZE(_VSI)			(0x00462000 + ((_VSI) * 4))
 #define VSIQF_HKEY_MAX_INDEX			12
 #define VSIQF_HLUT_MAX_INDEX			15
 #define PFPM_APM				0x000B8080

drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h

@@ -140,6 +140,26 @@ struct ice_fltr_desc {
 			(0xFFFFFFFFULL << ICE_FXD_FLTR_QW1_FDID_S)
 #define ICE_FXD_FLTR_QW1_FDID_ZERO	0x0ULL
 
+/* definition for FD filter programming status descriptor WB format */
+#define ICE_FXD_FLTR_WB_QW1_DD_S	0
+#define ICE_FXD_FLTR_WB_QW1_DD_M	(0x1ULL << ICE_FXD_FLTR_WB_QW1_DD_S)
+#define ICE_FXD_FLTR_WB_QW1_DD_YES	0x1ULL
+
+#define ICE_FXD_FLTR_WB_QW1_PROG_ID_S	1
+#define ICE_FXD_FLTR_WB_QW1_PROG_ID_M	\
+				(0x3ULL << ICE_FXD_FLTR_WB_QW1_PROG_ID_S)
+#define ICE_FXD_FLTR_WB_QW1_PROG_ADD	0x0ULL
+#define ICE_FXD_FLTR_WB_QW1_PROG_DEL	0x1ULL
+
+#define ICE_FXD_FLTR_WB_QW1_FAIL_S	4
+#define ICE_FXD_FLTR_WB_QW1_FAIL_M	(0x1ULL << ICE_FXD_FLTR_WB_QW1_FAIL_S)
+#define ICE_FXD_FLTR_WB_QW1_FAIL_YES	0x1ULL
+
+#define ICE_FXD_FLTR_WB_QW1_FAIL_PROF_S	5
+#define ICE_FXD_FLTR_WB_QW1_FAIL_PROF_M	\
+				(0x1ULL << ICE_FXD_FLTR_WB_QW1_FAIL_PROF_S)
+#define ICE_FXD_FLTR_WB_QW1_FAIL_PROF_YES	0x1ULL
+
 struct ice_rx_ptype_decoded {
 	u32 ptype:10;
 	u32 known:1;

drivers/net/ethernet/intel/ice/ice_main.c

@@ -2071,6 +2071,7 @@ static void ice_service_task(struct work_struct *work)
 	ice_process_vflr_event(pf);
 	ice_clean_mailboxq_subtask(pf);
 	ice_sync_arfs_fltrs(pf);
+	ice_flush_fdir_ctx(pf);
 	/* Clear __ICE_SERVICE_SCHED flag to allow scheduling next event */
 	ice_service_task_complete(pf);
 
@@ -2082,6 +2083,7 @@ static void ice_service_task(struct work_struct *work)
 	    test_bit(__ICE_MDD_EVENT_PENDING, pf->state) ||
 	    test_bit(__ICE_VFLR_EVENT_PENDING, pf->state) ||
 	    test_bit(__ICE_MAILBOXQ_EVENT_PENDING, pf->state) ||
+	    test_bit(__ICE_FD_VF_FLUSH_CTX, pf->state) ||
 	    test_bit(__ICE_ADMINQ_EVENT_PENDING, pf->state))
 		mod_timer(&pf->serv_tmr, jiffies);
 }

drivers/net/ethernet/intel/ice/ice_txrx.c

@@ -1115,6 +1115,11 @@ int ice_clean_rx_irq(struct ice_ring *rx_ring, int budget)
 		dma_rmb();
 
 		if (rx_desc->wb.rxdid == FDIR_DESC_RXDID || !rx_ring->netdev) {
+			struct ice_vsi *ctrl_vsi = rx_ring->vsi;
+
+			if (rx_desc->wb.rxdid == FDIR_DESC_RXDID &&
+			    ctrl_vsi->vf_id != ICE_INVAL_VFID)
+				ice_vc_fdir_irq_handler(ctrl_vsi, rx_desc);
 			ice_put_rx_buf(rx_ring, NULL, 0);
 			cleaned_count++;
 			continue;

drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h

@@ -5,6 +5,24 @@
 #define _ICE_VIRTCHNL_FDIR_H_
 
 struct ice_vf;
+struct ice_pf;
+
+enum ice_fdir_ctx_stat {
+	ICE_FDIR_CTX_READY,
+	ICE_FDIR_CTX_IRQ,
+	ICE_FDIR_CTX_TIMEOUT,
+};
+
+struct ice_vf_fdir_ctx {
+	struct timer_list rx_tmr;
+	enum virtchnl_ops v_opcode;
+	enum ice_fdir_ctx_stat stat;
+	union ice_32b_rx_flex_desc rx_desc;
+#define ICE_VF_FDIR_CTX_VALID		BIT(0)
+	u32 flags;
+
+	void *conf;
+};
 
 /* VF FDIR information structure */
 struct ice_vf_fdir {
@@ -14,11 +32,24 @@ struct ice_vf_fdir {
 
 	struct idr fdir_rule_idr;
 	struct list_head fdir_rule_list;
+
+	spinlock_t ctx_lock; /* protects FDIR context info */
+	struct ice_vf_fdir_ctx ctx_irq;
+	struct ice_vf_fdir_ctx ctx_done;
 };
 
+#ifdef CONFIG_PCI_IOV
 int ice_vc_add_fdir_fltr(struct ice_vf *vf, u8 *msg);
 int ice_vc_del_fdir_fltr(struct ice_vf *vf, u8 *msg);
 void ice_vf_fdir_init(struct ice_vf *vf);
 void ice_vf_fdir_exit(struct ice_vf *vf);
-
+void
+ice_vc_fdir_irq_handler(struct ice_vsi *ctrl_vsi,
+			union ice_32b_rx_flex_desc *rx_desc);
+void ice_flush_fdir_ctx(struct ice_pf *pf);
+#else
+static inline void
+ice_vc_fdir_irq_handler(struct ice_vsi *ctrl_vsi, union ice_32b_rx_flex_desc *rx_desc) { }
+static inline void ice_flush_fdir_ctx(struct ice_pf *pf) { }
+#endif /* CONFIG_PCI_IOV */
 #endif /* _ICE_VIRTCHNL_FDIR_H_ */