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 */
14static 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 */
54static 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 */
70static 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_itridx_s = VF_INT_DYN_CTLN_ITR_INDX_S;
101
102		spacing = IDPF_ITR_IDX_SPACING(reg_vals[vec_id].itrn_index_spacing,
103					       IDPF_VF_ITR_IDX_SPACING);
104		rx_itr = VF_INT_ITRN_ADDR(VIRTCHNL2_ITR_IDX_0,
105					  reg_vals[vec_id].itrn_reg,
106					  spacing);
107		tx_itr = VF_INT_ITRN_ADDR(VIRTCHNL2_ITR_IDX_1,
108					  reg_vals[vec_id].itrn_reg,
109					  spacing);
110		intr->rx_itr = idpf_get_reg_addr(adapter, rx_itr);
111		intr->tx_itr = idpf_get_reg_addr(adapter, tx_itr);
112	}
113
114free_reg_vals:
115	kfree(reg_vals);
116
117	return err;
118}
119
120/**
121 * idpf_vf_reset_reg_init - Initialize reset registers
122 * @adapter: Driver specific private structure
123 */
124static void idpf_vf_reset_reg_init(struct idpf_adapter *adapter)
125{
126	adapter->reset_reg.rstat = idpf_get_reg_addr(adapter, VFGEN_RSTAT);
127	adapter->reset_reg.rstat_m = VFGEN_RSTAT_VFR_STATE_M;
128}
129
130/**
131 * idpf_vf_trigger_reset - trigger reset
132 * @adapter: Driver specific private structure
133 * @trig_cause: Reason to trigger a reset
134 */
135static void idpf_vf_trigger_reset(struct idpf_adapter *adapter,
136				  enum idpf_flags trig_cause)
137{
138	/* Do not send VIRTCHNL2_OP_RESET_VF message on driver unload */
139	if (trig_cause == IDPF_HR_FUNC_RESET &&
140	    !test_bit(IDPF_REMOVE_IN_PROG, adapter->flags))
141		idpf_send_mb_msg(adapter, VIRTCHNL2_OP_RESET_VF, 0, NULL, 0);
142}
143
144/**
145 * idpf_vf_reg_ops_init - Initialize register API function pointers
146 * @adapter: Driver specific private structure
147 */
148static void idpf_vf_reg_ops_init(struct idpf_adapter *adapter)
149{
150	adapter->dev_ops.reg_ops.ctlq_reg_init = idpf_vf_ctlq_reg_init;
151	adapter->dev_ops.reg_ops.intr_reg_init = idpf_vf_intr_reg_init;
152	adapter->dev_ops.reg_ops.mb_intr_reg_init = idpf_vf_mb_intr_reg_init;
153	adapter->dev_ops.reg_ops.reset_reg_init = idpf_vf_reset_reg_init;
154	adapter->dev_ops.reg_ops.trigger_reset = idpf_vf_trigger_reset;
155}
156
157/**
158 * idpf_vf_dev_ops_init - Initialize device API function pointers
159 * @adapter: Driver specific private structure
160 */
161void idpf_vf_dev_ops_init(struct idpf_adapter *adapter)
162{
163	idpf_vf_reg_ops_init(adapter);
164}
165