1
2#include <linux/workqueue.h>
3
4#include "nitrox_csr.h"
5#include "nitrox_hal.h"
6#include "nitrox_dev.h"
7#include "nitrox_mbx.h"
8
9#define RING_TO_VFNO(_x, _y) ((_x) / (_y))
10
11
12
13
14enum mbx_msg_type {
15 MBX_MSG_TYPE_NOP,
16 MBX_MSG_TYPE_REQ,
17 MBX_MSG_TYPE_ACK,
18 MBX_MSG_TYPE_NACK,
19};
20
21
22
23
24enum mbx_msg_opcode {
25 MSG_OP_VF_MODE = 1,
26 MSG_OP_VF_UP,
27 MSG_OP_VF_DOWN,
28 MSG_OP_CHIPID_VFID,
29 MSG_OP_MCODE_INFO = 11,
30};
31
32struct pf2vf_work {
33 struct nitrox_vfdev *vfdev;
34 struct nitrox_device *ndev;
35 struct work_struct pf2vf_resp;
36};
37
38static inline u64 pf2vf_read_mbox(struct nitrox_device *ndev, int ring)
39{
40 u64 reg_addr;
41
42 reg_addr = NPS_PKT_MBOX_VF_PF_PFDATAX(ring);
43 return nitrox_read_csr(ndev, reg_addr);
44}
45
46static inline void pf2vf_write_mbox(struct nitrox_device *ndev, u64 value,
47 int ring)
48{
49 u64 reg_addr;
50
51 reg_addr = NPS_PKT_MBOX_PF_VF_PFDATAX(ring);
52 nitrox_write_csr(ndev, reg_addr, value);
53}
54
55static void pf2vf_send_response(struct nitrox_device *ndev,
56 struct nitrox_vfdev *vfdev)
57{
58 union mbox_msg msg;
59
60 msg.value = vfdev->msg.value;
61
62 switch (vfdev->msg.opcode) {
63 case MSG_OP_VF_MODE:
64 msg.data = ndev->mode;
65 break;
66 case MSG_OP_VF_UP:
67 vfdev->nr_queues = vfdev->msg.data;
68 atomic_set(&vfdev->state, __NDEV_READY);
69 break;
70 case MSG_OP_CHIPID_VFID:
71 msg.id.chipid = ndev->idx;
72 msg.id.vfid = vfdev->vfno;
73 break;
74 case MSG_OP_VF_DOWN:
75 vfdev->nr_queues = 0;
76 atomic_set(&vfdev->state, __NDEV_NOT_READY);
77 break;
78 case MSG_OP_MCODE_INFO:
79 msg.data = 0;
80 msg.mcode_info.count = 2;
81 msg.mcode_info.info = MCODE_TYPE_SE_SSL | (MCODE_TYPE_AE << 5);
82 msg.mcode_info.next_se_grp = 1;
83 msg.mcode_info.next_ae_grp = 1;
84 break;
85 default:
86 msg.type = MBX_MSG_TYPE_NOP;
87 break;
88 }
89
90 if (msg.type == MBX_MSG_TYPE_NOP)
91 return;
92
93
94 msg.type = MBX_MSG_TYPE_ACK;
95 pf2vf_write_mbox(ndev, msg.value, vfdev->ring);
96
97 vfdev->msg.value = 0;
98 atomic64_inc(&vfdev->mbx_resp);
99}
100
101static void pf2vf_resp_handler(struct work_struct *work)
102{
103 struct pf2vf_work *pf2vf_resp = container_of(work, struct pf2vf_work,
104 pf2vf_resp);
105 struct nitrox_vfdev *vfdev = pf2vf_resp->vfdev;
106 struct nitrox_device *ndev = pf2vf_resp->ndev;
107
108 switch (vfdev->msg.type) {
109 case MBX_MSG_TYPE_REQ:
110
111 pf2vf_send_response(ndev, vfdev);
112 break;
113 case MBX_MSG_TYPE_ACK:
114 case MBX_MSG_TYPE_NACK:
115 break;
116 }
117
118 kfree(pf2vf_resp);
119}
120
121void nitrox_pf2vf_mbox_handler(struct nitrox_device *ndev)
122{
123 struct nitrox_vfdev *vfdev;
124 struct pf2vf_work *pfwork;
125 u64 value, reg_addr;
126 u32 i;
127 int vfno;
128
129
130 reg_addr = NPS_PKT_MBOX_INT_LO;
131 value = nitrox_read_csr(ndev, reg_addr);
132 for_each_set_bit(i, (const unsigned long *)&value, BITS_PER_LONG) {
133
134 vfno = RING_TO_VFNO(i, ndev->iov.max_vf_queues);
135 vfdev = ndev->iov.vfdev + vfno;
136 vfdev->ring = i;
137
138 vfdev->msg.value = pf2vf_read_mbox(ndev, vfdev->ring);
139 pfwork = kzalloc(sizeof(*pfwork), GFP_ATOMIC);
140 if (!pfwork)
141 continue;
142
143 pfwork->vfdev = vfdev;
144 pfwork->ndev = ndev;
145 INIT_WORK(&pfwork->pf2vf_resp, pf2vf_resp_handler);
146 queue_work(ndev->iov.pf2vf_wq, &pfwork->pf2vf_resp);
147
148 nitrox_write_csr(ndev, reg_addr, BIT_ULL(i));
149 }
150
151
152 reg_addr = NPS_PKT_MBOX_INT_HI;
153 value = nitrox_read_csr(ndev, reg_addr);
154 for_each_set_bit(i, (const unsigned long *)&value, BITS_PER_LONG) {
155
156 vfno = RING_TO_VFNO(i + 64, ndev->iov.max_vf_queues);
157 vfdev = ndev->iov.vfdev + vfno;
158 vfdev->ring = (i + 64);
159
160 vfdev->msg.value = pf2vf_read_mbox(ndev, vfdev->ring);
161
162 pfwork = kzalloc(sizeof(*pfwork), GFP_ATOMIC);
163 if (!pfwork)
164 continue;
165
166 pfwork->vfdev = vfdev;
167 pfwork->ndev = ndev;
168 INIT_WORK(&pfwork->pf2vf_resp, pf2vf_resp_handler);
169 queue_work(ndev->iov.pf2vf_wq, &pfwork->pf2vf_resp);
170
171 nitrox_write_csr(ndev, reg_addr, BIT_ULL(i));
172 }
173}
174
175int nitrox_mbox_init(struct nitrox_device *ndev)
176{
177 struct nitrox_vfdev *vfdev;
178 int i;
179
180 ndev->iov.vfdev = kcalloc(ndev->iov.num_vfs,
181 sizeof(struct nitrox_vfdev), GFP_KERNEL);
182 if (!ndev->iov.vfdev)
183 return -ENOMEM;
184
185 for (i = 0; i < ndev->iov.num_vfs; i++) {
186 vfdev = ndev->iov.vfdev + i;
187 vfdev->vfno = i;
188 }
189
190
191 ndev->iov.pf2vf_wq = alloc_workqueue("nitrox_pf2vf", 0, 0);
192 if (!ndev->iov.pf2vf_wq) {
193 kfree(ndev->iov.vfdev);
194 return -ENOMEM;
195 }
196
197 enable_pf2vf_mbox_interrupts(ndev);
198
199 return 0;
200}
201
202void nitrox_mbox_cleanup(struct nitrox_device *ndev)
203{
204
205 disable_pf2vf_mbox_interrupts(ndev);
206
207 if (ndev->iov.pf2vf_wq)
208 destroy_workqueue(ndev->iov.pf2vf_wq);
209
210 kfree(ndev->iov.vfdev);
211 ndev->iov.pf2vf_wq = NULL;
212 ndev->iov.vfdev = NULL;
213}
214
