1// SPDX-License-Identifier: GPL-2.0-only
2/* Copyright (C) 2023 Intel Corporation */
3
4#include "idpf.h"
5#include "idpf_lan_pf_regs.h"
6#include "idpf_virtchnl.h"
7
8#define IDPF_PF_ITR_IDX_SPACING 0x4
9
10/**
11 * idpf_ctlq_reg_init - initialize default mailbox registers
12 * @cq: pointer to the array of create control queues
13 */
14static void idpf_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 = PF_FW_ATQH;
25 ccq->reg.tail = PF_FW_ATQT;
26 ccq->reg.len = PF_FW_ATQLEN;
27 ccq->reg.bah = PF_FW_ATQBAH;
28 ccq->reg.bal = PF_FW_ATQBAL;
29 ccq->reg.len_mask = PF_FW_ATQLEN_ATQLEN_M;
30 ccq->reg.len_ena_mask = PF_FW_ATQLEN_ATQENABLE_M;
31 ccq->reg.head_mask = PF_FW_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 = PF_FW_ARQH;
36 ccq->reg.tail = PF_FW_ARQT;
37 ccq->reg.len = PF_FW_ARQLEN;
38 ccq->reg.bah = PF_FW_ARQBAH;
39 ccq->reg.bal = PF_FW_ARQBAL;
40 ccq->reg.len_mask = PF_FW_ARQLEN_ARQLEN_M;
41 ccq->reg.len_ena_mask = PF_FW_ARQLEN_ARQENABLE_M;
42 ccq->reg.head_mask = PF_FW_ARQH_ARQH_M;
43 break;
44 default:
45 break;
46 }
47 }
48}
49
50/**
51 * idpf_mb_intr_reg_init - Initialize mailbox interrupt register
52 * @adapter: adapter structure
53 */
54static void idpf_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, reg_offset: dyn_ctl);
60 intr->dyn_ctl_intena_m = PF_GLINT_DYN_CTL_INTENA_M;
61 intr->dyn_ctl_itridx_m = PF_GLINT_DYN_CTL_ITR_INDX_M;
62 intr->icr_ena = idpf_get_reg_addr(adapter, PF_INT_DIR_OICR_ENA);
63 intr->icr_ena_ctlq_m = PF_INT_DIR_OICR_ENA_M;
64}
65
66/**
67 * idpf_intr_reg_init - Initialize interrupt registers
68 * @vport: virtual port structure
69 */
70static int idpf_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(adapter: vport->adapter);
80 reg_vals = kcalloc(n: total_vecs, size: 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_offset: reg_vals[vec_id].dyn_ctl_reg);
99 intr->dyn_ctl_intena_m = PF_GLINT_DYN_CTL_INTENA_M;
100 intr->dyn_ctl_itridx_s = PF_GLINT_DYN_CTL_ITR_INDX_S;
101 intr->dyn_ctl_intrvl_s = PF_GLINT_DYN_CTL_INTERVAL_S;
102
103 spacing = IDPF_ITR_IDX_SPACING(reg_vals[vec_id].itrn_index_spacing,
104 IDPF_PF_ITR_IDX_SPACING);
105 rx_itr = PF_GLINT_ITR_ADDR(VIRTCHNL2_ITR_IDX_0,
106 reg_vals[vec_id].itrn_reg,
107 spacing);
108 tx_itr = PF_GLINT_ITR_ADDR(VIRTCHNL2_ITR_IDX_1,
109 reg_vals[vec_id].itrn_reg,
110 spacing);
111 intr->rx_itr = idpf_get_reg_addr(adapter, reg_offset: rx_itr);
112 intr->tx_itr = idpf_get_reg_addr(adapter, reg_offset: tx_itr);
113 }
114
115free_reg_vals:
116 kfree(objp: reg_vals);
117
118 return err;
119}
120
121/**
122 * idpf_reset_reg_init - Initialize reset registers
123 * @adapter: Driver specific private structure
124 */
125static void idpf_reset_reg_init(struct idpf_adapter *adapter)
126{
127 adapter->reset_reg.rstat = idpf_get_reg_addr(adapter, PFGEN_RSTAT);
128 adapter->reset_reg.rstat_m = PFGEN_RSTAT_PFR_STATE_M;
129}
130
131/**
132 * idpf_trigger_reset - trigger reset
133 * @adapter: Driver specific private structure
134 * @trig_cause: Reason to trigger a reset
135 */
136static void idpf_trigger_reset(struct idpf_adapter *adapter,
137 enum idpf_flags __always_unused trig_cause)
138{
139 u32 reset_reg;
140
141 reset_reg = readl(addr: idpf_get_reg_addr(adapter, PFGEN_CTRL));
142 writel(val: reset_reg | PFGEN_CTRL_PFSWR,
143 addr: idpf_get_reg_addr(adapter, PFGEN_CTRL));
144}
145
146/**
147 * idpf_reg_ops_init - Initialize register API function pointers
148 * @adapter: Driver specific private structure
149 */
150static void idpf_reg_ops_init(struct idpf_adapter *adapter)
151{
152 adapter->dev_ops.reg_ops.ctlq_reg_init = idpf_ctlq_reg_init;
153 adapter->dev_ops.reg_ops.intr_reg_init = idpf_intr_reg_init;
154 adapter->dev_ops.reg_ops.mb_intr_reg_init = idpf_mb_intr_reg_init;
155 adapter->dev_ops.reg_ops.reset_reg_init = idpf_reset_reg_init;
156 adapter->dev_ops.reg_ops.trigger_reset = idpf_trigger_reset;
157}
158
159/**
160 * idpf_dev_ops_init - Initialize device API function pointers
161 * @adapter: Driver specific private structure
162 */
163void idpf_dev_ops_init(struct idpf_adapter *adapter)
164{
165 idpf_reg_ops_init(adapter);
166}
167

source code of linux/drivers/net/ethernet/intel/idpf/idpf_dev.c