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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Copyright (C) 2023 Intel Corporation */
   3
   4 #include "idpf.h"
   5 #include "idpf_lan_vf_regs.h"
   6 #include "idpf_virtchnl.h"
   7
   8 #define IDPF_VF_ITR_IDX_SPACING         0x40
   9
  10 /**
  11  * idpf_vf_ctlq_reg_init - initialize default mailbox registers
  12  * @cq: pointer to the array of create control queues
  13  */
  14 static void idpf_vf_ctlq_reg_init(struct idpf_ctlq_create_info *cq)
  15 {
  16         int i;
  17
  18         for (i = 0; i < IDPF_NUM_DFLT_MBX_Q; i++) {
  19                 struct idpf_ctlq_create_info *ccq = cq + i;
  20
  21                 switch (ccq->type) {
  22                 case IDPF_CTLQ_TYPE_MAILBOX_TX:
  23                         /* set head and tail registers in our local struct */
  24                         ccq->reg.head = VF_ATQH;
  25                         ccq->reg.tail = VF_ATQT;
  26                         ccq->reg.len = VF_ATQLEN;
  27                         ccq->reg.bah = VF_ATQBAH;
  28                         ccq->reg.bal = VF_ATQBAL;
  29                         ccq->reg.len_mask = VF_ATQLEN_ATQLEN_M;
  30                         ccq->reg.len_ena_mask = VF_ATQLEN_ATQENABLE_M;
  31                         ccq->reg.head_mask = VF_ATQH_ATQH_M;
  32                         break;
  33                 case IDPF_CTLQ_TYPE_MAILBOX_RX:
  34                         /* set head and tail registers in our local struct */
  35                         ccq->reg.head = VF_ARQH;
  36                         ccq->reg.tail = VF_ARQT;
  37                         ccq->reg.len = VF_ARQLEN;
  38                         ccq->reg.bah = VF_ARQBAH;
  39                         ccq->reg.bal = VF_ARQBAL;
  40                         ccq->reg.len_mask = VF_ARQLEN_ARQLEN_M;
  41                         ccq->reg.len_ena_mask = VF_ARQLEN_ARQENABLE_M;
  42                         ccq->reg.head_mask = VF_ARQH_ARQH_M;
  43                         break;
  44                 default:
  45                         break;
  46                 }
  47         }
  48 }
  49
  50 /**
  51  * idpf_vf_mb_intr_reg_init - Initialize the mailbox register
  52  * @adapter: adapter structure
  53  */
  54 static void idpf_vf_mb_intr_reg_init(struct idpf_adapter *adapter)
  55 {
  56         struct idpf_intr_reg *intr = &adapter->mb_vector.intr_reg;
  57         u32 dyn_ctl = le32_to_cpu(adapter->caps.mailbox_dyn_ctl);
  58
  59         intr->dyn_ctl = idpf_get_reg_addr(adapter, dyn_ctl);
  60         intr->dyn_ctl_intena_m = VF_INT_DYN_CTL0_INTENA_M;
  61         intr->dyn_ctl_itridx_m = VF_INT_DYN_CTL0_ITR_INDX_M;
  62         intr->icr_ena = idpf_get_reg_addr(adapter, VF_INT_ICR0_ENA1);
  63         intr->icr_ena_ctlq_m = VF_INT_ICR0_ENA1_ADMINQ_M;
  64 }
  65
  66 /**
  67  * idpf_vf_intr_reg_init - Initialize interrupt registers
  68  * @vport: virtual port structure
  69  */
  70 static int idpf_vf_intr_reg_init(struct idpf_vport *vport)
  71 {
  72         struct idpf_adapter *adapter = vport->adapter;
  73         int num_vecs = vport->num_q_vectors;
  74         struct idpf_vec_regs *reg_vals;
  75         int num_regs, i, err = 0;
  76         u32 rx_itr, tx_itr;
  77         u16 total_vecs;
  78
  79         total_vecs = idpf_get_reserved_vecs(vport->adapter);
  80         reg_vals = kcalloc(total_vecs, sizeof(struct idpf_vec_regs),
  81                            GFP_KERNEL);
  82         if (!reg_vals)
  83                 return -ENOMEM;
  84
  85         num_regs = idpf_get_reg_intr_vecs(vport, reg_vals);
  86         if (num_regs < num_vecs) {
  87                 err = -EINVAL;
  88                 goto free_reg_vals;
  89         }
  90
  91         for (i = 0; i < num_vecs; i++) {
  92                 struct idpf_q_vector *q_vector = &vport->q_vectors[i];
  93                 u16 vec_id = vport->q_vector_idxs[i] - IDPF_MBX_Q_VEC;
  94                 struct idpf_intr_reg *intr = &q_vector->intr_reg;
  95                 u32 spacing;
  96
  97                 intr->dyn_ctl = idpf_get_reg_addr(adapter,
  98                                                   reg_vals[vec_id].dyn_ctl_reg);
  99                 intr->dyn_ctl_intena_m = VF_INT_DYN_CTLN_INTENA_M;
 100                 intr->dyn_ctl_intena_msk_m = VF_INT_DYN_CTLN_INTENA_MSK_M;
 101                 intr->dyn_ctl_itridx_s = VF_INT_DYN_CTLN_ITR_INDX_S;
 102                 intr->dyn_ctl_wb_on_itr_m = VF_INT_DYN_CTLN_WB_ON_ITR_M;
 103
 104                 spacing = IDPF_ITR_IDX_SPACING(reg_vals[vec_id].itrn_index_spacing,
 105                                                IDPF_VF_ITR_IDX_SPACING);
 106                 rx_itr = VF_INT_ITRN_ADDR(VIRTCHNL2_ITR_IDX_0,
 107                                           reg_vals[vec_id].itrn_reg,
 108                                           spacing);
 109                 tx_itr = VF_INT_ITRN_ADDR(VIRTCHNL2_ITR_IDX_1,
 110                                           reg_vals[vec_id].itrn_reg,
 111                                           spacing);
 112                 intr->rx_itr = idpf_get_reg_addr(adapter, rx_itr);
 113                 intr->tx_itr = idpf_get_reg_addr(adapter, tx_itr);
 114         }
 115
 116 free_reg_vals:
 117         kfree(reg_vals);
 118
 119         return err;
 120 }
 121
 122 /**
 123  * idpf_vf_reset_reg_init - Initialize reset registers
 124  * @adapter: Driver specific private structure
 125  */
 126 static void idpf_vf_reset_reg_init(struct idpf_adapter *adapter)
 127 {
 128         adapter->reset_reg.rstat = idpf_get_reg_addr(adapter, VFGEN_RSTAT);
 129         adapter->reset_reg.rstat_m = VFGEN_RSTAT_VFR_STATE_M;
 130 }
 131
 132 /**
 133  * idpf_vf_trigger_reset - trigger reset
 134  * @adapter: Driver specific private structure
 135  * @trig_cause: Reason to trigger a reset
 136  */
 137 static void idpf_vf_trigger_reset(struct idpf_adapter *adapter,
 138                                   enum idpf_flags trig_cause)
 139 {
 140         /* Do not send VIRTCHNL2_OP_RESET_VF message on driver unload */
 141         if (trig_cause == IDPF_HR_FUNC_RESET &&
 142             !test_bit(IDPF_REMOVE_IN_PROG, adapter->flags))
 143                 idpf_send_mb_msg(adapter, VIRTCHNL2_OP_RESET_VF, 0, NULL, 0);
 144 }
 145
 146 /**
 147  * idpf_vf_reg_ops_init - Initialize register API function pointers
 148  * @adapter: Driver specific private structure
 149  */
 150 static void idpf_vf_reg_ops_init(struct idpf_adapter *adapter)
 151 {
 152         adapter->dev_ops.reg_ops.ctlq_reg_init = idpf_vf_ctlq_reg_init;
 153         adapter->dev_ops.reg_ops.intr_reg_init = idpf_vf_intr_reg_init;
 154         adapter->dev_ops.reg_ops.mb_intr_reg_init = idpf_vf_mb_intr_reg_init;
 155         adapter->dev_ops.reg_ops.reset_reg_init = idpf_vf_reset_reg_init;
 156         adapter->dev_ops.reg_ops.trigger_reset = idpf_vf_trigger_reset;
 157 }
 158
 159 /**
 160  * idpf_vf_dev_ops_init - Initialize device API function pointers
 161  * @adapter: Driver specific private structure
 162  */
 163 void idpf_vf_dev_ops_init(struct idpf_adapter *adapter)
 164 {
 165         idpf_vf_reg_ops_init(adapter);
 166 }