idpf: initialize interrupts and enable vport

To further continue 'vport open', initialize all the resources
required for the interrupts. To start with, initialize the
queue vector indices with the ones received from the device
Control Plane. Now that all the TX and RX queues are initialized,
map the RX descriptor and buffer queues as well as TX completion
queues to the allocated vectors. Initialize and enable the napi
handler for the napi polling. Finally, request the IRQs for the
interrupt vectors from the stack and setup the interrupt handler.

Once the interrupt init is done, send 'map queue vector', 'enable
queues' and 'enable vport' virtchnl messages to the CP to complete
the 'vport open' flow.

Co-developed-by: Alan Brady <[email protected]>
Signed-off-by: Alan Brady <[email protected]>
Co-developed-by: Joshua Hay <[email protected]>
Signed-off-by: Joshua Hay <[email protected]>
Co-developed-by: Madhu Chittim <[email protected]>
Signed-off-by: Madhu Chittim <[email protected]>
Co-developed-by: Phani Burra <[email protected]>
Signed-off-by: Phani Burra <[email protected]>
Reviewed-by: Sridhar Samudrala <[email protected]>
Reviewed-by: Willem de Bruijn <[email protected]>
Signed-off-by: Pavan Kumar Linga <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: plinga1

drivers/net/ethernet/intel/idpf/idpf.h

@@ -176,12 +176,14 @@ struct idpf_vport_max_q {
 /**
  * struct idpf_reg_ops - Device specific register operation function pointers
  * @ctlq_reg_init: Mailbox control queue register initialization
+ * @intr_reg_init: Traffic interrupt register initialization
  * @mb_intr_reg_init: Mailbox interrupt register initialization
  * @reset_reg_init: Reset register initialization
  * @trigger_reset: Trigger a reset to occur
  */
 struct idpf_reg_ops {
 	void (*ctlq_reg_init)(struct idpf_ctlq_create_info *cq);
+	int (*intr_reg_init)(struct idpf_vport *vport);
 	void (*mb_intr_reg_init)(struct idpf_adapter *adapter);
 	void (*reset_reg_init)(struct idpf_adapter *adapter);
 	void (*trigger_reset)(struct idpf_adapter *adapter,
@@ -204,12 +206,24 @@ struct idpf_dev_ops {
 #define IDPF_FOREACH_VPORT_VC_STATE(STATE)	\
 	STATE(IDPF_VC_CREATE_VPORT)		\
 	STATE(IDPF_VC_CREATE_VPORT_ERR)		\
+	STATE(IDPF_VC_ENA_VPORT)		\
+	STATE(IDPF_VC_ENA_VPORT_ERR)		\
+	STATE(IDPF_VC_DIS_VPORT)		\
+	STATE(IDPF_VC_DIS_VPORT_ERR)		\
 	STATE(IDPF_VC_DESTROY_VPORT)		\
 	STATE(IDPF_VC_DESTROY_VPORT_ERR)	\
 	STATE(IDPF_VC_CONFIG_TXQ)		\
 	STATE(IDPF_VC_CONFIG_TXQ_ERR)		\
 	STATE(IDPF_VC_CONFIG_RXQ)		\
 	STATE(IDPF_VC_CONFIG_RXQ_ERR)		\
+	STATE(IDPF_VC_ENA_QUEUES)		\
+	STATE(IDPF_VC_ENA_QUEUES_ERR)		\
+	STATE(IDPF_VC_DIS_QUEUES)		\
+	STATE(IDPF_VC_DIS_QUEUES_ERR)		\
+	STATE(IDPF_VC_MAP_IRQ)			\
+	STATE(IDPF_VC_MAP_IRQ_ERR)		\
+	STATE(IDPF_VC_UNMAP_IRQ)		\
+	STATE(IDPF_VC_UNMAP_IRQ_ERR)		\
 	STATE(IDPF_VC_ALLOC_VECTORS)		\
 	STATE(IDPF_VC_ALLOC_VECTORS_ERR)	\
 	STATE(IDPF_VC_DEALLOC_VECTORS)		\
@@ -272,8 +286,10 @@ extern const char * const idpf_vport_vc_state_str[];
  * @base_rxd: True if the driver should use base descriptors instead of flex
  * @num_q_vectors: Number of IRQ vectors allocated
  * @q_vectors: Array of queue vectors
+ * @q_vector_idxs: Starting index of queue vectors
  * @max_mtu: device given max possible MTU
  * @default_mac_addr: device will give a default MAC to use
+ * @link_up: True if link is up
  * @vc_msg: Virtchnl message buffer
  * @vc_state: Virtchnl message state
  * @vchnl_wq: Wait queue for virtchnl messages
@@ -310,9 +326,12 @@ struct idpf_vport {
 
 	u16 num_q_vectors;
 	struct idpf_q_vector *q_vectors;
+	u16 *q_vector_idxs;
 	u16 max_mtu;
 	u8 default_mac_addr[ETH_ALEN];
 
+	bool link_up;
+
 	char vc_msg[IDPF_CTLQ_MAX_BUF_LEN];
 	DECLARE_BITMAP(vc_state, IDPF_VC_NBITS);
 
@@ -391,6 +410,22 @@ struct idpf_avail_queue_info {
 	u16 avail_complq;
 };
 
+/**
+ * struct idpf_vector_info - Utility structure to pass function arguments as a
+ *			     structure
+ * @num_req_vecs: Vectors required based on the number of queues updated by the
+ *		  user via ethtool
+ * @num_curr_vecs: Current number of vectors, must be >= @num_req_vecs
+ * @index: Relative starting index for vectors
+ * @default_vport: Vectors are for default vport
+ */
+struct idpf_vector_info {
+	u16 num_req_vecs;
+	u16 num_curr_vecs;
+	u16 index;
+	bool default_vport;
+};
+
 /**
  * struct idpf_vector_lifo - Stack to maintain vector indexes used for vector
  *			     distribution algorithm
@@ -748,13 +783,20 @@ int idpf_vc_core_init(struct idpf_adapter *adapter);
 void idpf_vc_core_deinit(struct idpf_adapter *adapter);
 int idpf_intr_req(struct idpf_adapter *adapter);
 void idpf_intr_rel(struct idpf_adapter *adapter);
+int idpf_get_reg_intr_vecs(struct idpf_vport *vport,
+			   struct idpf_vec_regs *reg_vals);
+int idpf_send_enable_vport_msg(struct idpf_vport *vport);
+int idpf_send_disable_vport_msg(struct idpf_vport *vport);
 int idpf_send_destroy_vport_msg(struct idpf_vport *vport);
 int idpf_send_get_rx_ptype_msg(struct idpf_vport *vport);
 int idpf_send_get_set_rss_key_msg(struct idpf_vport *vport, bool get);
 int idpf_send_get_set_rss_lut_msg(struct idpf_vport *vport, bool get);
 int idpf_send_dealloc_vectors_msg(struct idpf_adapter *adapter);
 int idpf_send_alloc_vectors_msg(struct idpf_adapter *adapter, u16 num_vectors);
 void idpf_deinit_task(struct idpf_adapter *adapter);
+int idpf_req_rel_vector_indexes(struct idpf_adapter *adapter,
+				u16 *q_vector_idxs,
+				struct idpf_vector_info *vec_info);
 int idpf_get_vec_ids(struct idpf_adapter *adapter,
 		     u16 *vecids, int num_vecids,
 		     struct virtchnl2_vector_chunks *chunks);
@@ -769,13 +811,16 @@ void idpf_vport_dealloc_max_qs(struct idpf_adapter *adapter,
 int idpf_add_del_mac_filters(struct idpf_vport *vport,
 			     struct idpf_netdev_priv *np,
 			     bool add, bool async);
+int idpf_send_disable_queues_msg(struct idpf_vport *vport);
 void idpf_vport_init(struct idpf_vport *vport, struct idpf_vport_max_q *max_q);
 u32 idpf_get_vport_id(struct idpf_vport *vport);
 int idpf_vport_queue_ids_init(struct idpf_vport *vport);
 int idpf_queue_reg_init(struct idpf_vport *vport);
 int idpf_send_config_queues_msg(struct idpf_vport *vport);
+int idpf_send_enable_queues_msg(struct idpf_vport *vport);
 int idpf_send_create_vport_msg(struct idpf_adapter *adapter,
 			       struct idpf_vport_max_q *max_q);
 int idpf_check_supported_desc_ids(struct idpf_vport *vport);
+int idpf_send_map_unmap_queue_vector_msg(struct idpf_vport *vport, bool map);
 
 #endif /* !_IDPF_H_ */

drivers/net/ethernet/intel/idpf/idpf_dev.c

@@ -4,6 +4,8 @@
 #include "idpf.h"
 #include "idpf_lan_pf_regs.h"
 
+#define IDPF_PF_ITR_IDX_SPACING		0x4
+
 /**
  * idpf_ctlq_reg_init - initialize default mailbox registers
  * @cq: pointer to the array of create control queues
@@ -60,6 +62,61 @@ static void idpf_mb_intr_reg_init(struct idpf_adapter *adapter)
 	intr->icr_ena_ctlq_m = PF_INT_DIR_OICR_ENA_M;
 }
 
+/**
+ * idpf_intr_reg_init - Initialize interrupt registers
+ * @vport: virtual port structure
+ */
+static int idpf_intr_reg_init(struct idpf_vport *vport)
+{
+	struct idpf_adapter *adapter = vport->adapter;
+	int num_vecs = vport->num_q_vectors;
+	struct idpf_vec_regs *reg_vals;
+	int num_regs, i, err = 0;
+	u32 rx_itr, tx_itr;
+	u16 total_vecs;
+
+	total_vecs = idpf_get_reserved_vecs(vport->adapter);
+	reg_vals = kcalloc(total_vecs, sizeof(struct idpf_vec_regs),
+			   GFP_KERNEL);
+	if (!reg_vals)
+		return -ENOMEM;
+
+	num_regs = idpf_get_reg_intr_vecs(vport, reg_vals);
+	if (num_regs < num_vecs) {
+		err = -EINVAL;
+		goto free_reg_vals;
+	}
+
+	for (i = 0; i < num_vecs; i++) {
+		struct idpf_q_vector *q_vector = &vport->q_vectors[i];
+		u16 vec_id = vport->q_vector_idxs[i] - IDPF_MBX_Q_VEC;
+		struct idpf_intr_reg *intr = &q_vector->intr_reg;
+		u32 spacing;
+
+		intr->dyn_ctl = idpf_get_reg_addr(adapter,
+						  reg_vals[vec_id].dyn_ctl_reg);
+		intr->dyn_ctl_intena_m = PF_GLINT_DYN_CTL_INTENA_M;
+		intr->dyn_ctl_itridx_s = PF_GLINT_DYN_CTL_ITR_INDX_S;
+		intr->dyn_ctl_intrvl_s = PF_GLINT_DYN_CTL_INTERVAL_S;
+
+		spacing = IDPF_ITR_IDX_SPACING(reg_vals[vec_id].itrn_index_spacing,
+					       IDPF_PF_ITR_IDX_SPACING);
+		rx_itr = PF_GLINT_ITR_ADDR(VIRTCHNL2_ITR_IDX_0,
+					   reg_vals[vec_id].itrn_reg,
+					   spacing);
+		tx_itr = PF_GLINT_ITR_ADDR(VIRTCHNL2_ITR_IDX_1,
+					   reg_vals[vec_id].itrn_reg,
+					   spacing);
+		intr->rx_itr = idpf_get_reg_addr(adapter, rx_itr);
+		intr->tx_itr = idpf_get_reg_addr(adapter, tx_itr);
+	}
+
+free_reg_vals:
+	kfree(reg_vals);
+
+	return err;
+}
+
 /**
  * idpf_reset_reg_init - Initialize reset registers
  * @adapter: Driver specific private structure
@@ -92,6 +149,7 @@ static void idpf_trigger_reset(struct idpf_adapter *adapter,
 static void idpf_reg_ops_init(struct idpf_adapter *adapter)
 {
 	adapter->dev_ops.reg_ops.ctlq_reg_init = idpf_ctlq_reg_init;
+	adapter->dev_ops.reg_ops.intr_reg_init = idpf_intr_reg_init;
 	adapter->dev_ops.reg_ops.mb_intr_reg_init = idpf_mb_intr_reg_init;
 	adapter->dev_ops.reg_ops.reset_reg_init = idpf_reset_reg_init;
 	adapter->dev_ops.reg_ops.trigger_reset = idpf_trigger_reset;

drivers/net/ethernet/intel/idpf/idpf_lan_pf_regs.h

@@ -74,6 +74,17 @@
 #define PF_GLINT_DYN_CTL_WB_ON_ITR_M	BIT(PF_GLINT_DYN_CTL_WB_ON_ITR_S)
 #define PF_GLINT_DYN_CTL_INTENA_MSK_S	31
 #define PF_GLINT_DYN_CTL_INTENA_MSK_M	BIT(PF_GLINT_DYN_CTL_INTENA_MSK_S)
+/* _ITR is ITR index, _INT is interrupt index, _itrn_indx_spacing is
+ * spacing b/w itrn registers of the same vector.
+ */
+#define PF_GLINT_ITR_ADDR(_ITR, _reg_start, _itrn_indx_spacing)	\
+	((_reg_start) + ((_ITR) * (_itrn_indx_spacing)))
+/* For PF, itrn_indx_spacing is 4 and itrn_reg_spacing is 0x1000 */
+#define PF_GLINT_ITR(_ITR, _INT)	\
+	(PF_GLINT_BASE + (((_ITR) + 1) * 4) + ((_INT) * 0x1000))
+#define PF_GLINT_ITR_MAX_INDEX		2
+#define PF_GLINT_ITR_INTERVAL_S		0
+#define PF_GLINT_ITR_INTERVAL_M		GENMASK(11, 0)
 
 /* Generic registers */
 #define PF_INT_DIR_OICR_ENA		0x08406000

drivers/net/ethernet/intel/idpf/idpf_lan_vf_regs.h

@@ -88,6 +88,31 @@
 #define VF_INT_DYN_CTLN_WB_ON_ITR_M	BIT(VF_INT_DYN_CTLN_WB_ON_ITR_S)
 #define VF_INT_DYN_CTLN_INTENA_MSK_S	31
 #define VF_INT_DYN_CTLN_INTENA_MSK_M	BIT(VF_INT_DYN_CTLN_INTENA_MSK_S)
+/* _ITR is ITR index, _INT is interrupt index, _itrn_indx_spacing is spacing
+ * b/w itrn registers of the same vector
+ */
+#define VF_INT_ITR0(_ITR)		(0x00004C00 + ((_ITR) * 4))
+#define VF_INT_ITRN_ADDR(_ITR, _reg_start, _itrn_indx_spacing)	\
+	((_reg_start) + ((_ITR) * (_itrn_indx_spacing)))
+/* For VF with 16 vector support, itrn_reg_spacing is 0x4, itrn_indx_spacing
+ * is 0x40 and base register offset is 0x00002800
+ */
+#define VF_INT_ITRN(_INT, _ITR)		\
+	(0x00002800 + ((_INT) * 4) + ((_ITR) * 0x40))
+/* For VF with 64 vector support, itrn_reg_spacing is 0x4, itrn_indx_spacing
+ * is 0x100 and base register offset is 0x00002C00
+ */
+#define VF_INT_ITRN_64(_INT, _ITR)	\
+	(0x00002C00 + ((_INT) * 4) + ((_ITR) * 0x100))
+/* For VF with 2k vector support, itrn_reg_spacing is 0x4, itrn_indx_spacing
+ * is 0x2000 and base register offset is 0x00072000
+ */
+#define VF_INT_ITRN_2K(_INT, _ITR)	\
+	(0x00072000 + ((_INT) * 4) + ((_ITR) * 0x2000))
+#define VF_INT_ITRN_MAX_INDEX		2
+#define VF_INT_ITRN_INTERVAL_S		0
+#define VF_INT_ITRN_INTERVAL_M		GENMASK(11, 0)
+#define VF_INT_PBA_CLEAR		0x00008900
 
 #define VF_INT_ICR0_ENA1		0x00005000
 #define VF_INT_ICR0_ENA1_ADMINQ_S	30