1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
2 /* Copyright (c) 2015 - 2021 Intel Corporation */
3 #include "main.h"
4 #include "i40iw_hw.h"
5 #include <linux/net/intel/i40e_client.h>
6 
7 static struct i40e_client i40iw_client;
8 
9 /**
10  * i40iw_l2param_change - handle mss change
11  * @cdev_info: parent lan device information structure with data/ops
12  * @client: client for parameter change
13  * @params: new parameters from L2
14  */
15 static void i40iw_l2param_change(struct i40e_info *cdev_info,
16 				 struct i40e_client *client,
17 				 struct i40e_params *params)
18 {
19 	struct irdma_l2params l2params = {};
20 	struct irdma_device *iwdev;
21 	struct ib_device *ibdev;
22 
23 	ibdev = ib_device_get_by_netdev(cdev_info->netdev, RDMA_DRIVER_IRDMA);
24 	if (!ibdev)
25 		return;
26 
27 	iwdev = to_iwdev(ibdev);
28 
29 	if (iwdev->vsi.mtu != params->mtu) {
30 		l2params.mtu_changed = true;
31 		l2params.mtu = params->mtu;
32 	}
33 	irdma_change_l2params(&iwdev->vsi, &l2params);
34 	ib_device_put(ibdev);
35 }
36 
37 /**
38  * i40iw_close - client interface operation close for iwarp/uda device
39  * @cdev_info: parent lan device information structure with data/ops
40  * @client: client to close
41  * @reset: flag to indicate close on reset
42  *
43  * Called by the lan driver during the processing of client unregister
44  * Destroy and clean up the driver resources
45  */
46 static void i40iw_close(struct i40e_info *cdev_info, struct i40e_client *client,
47 			bool reset)
48 {
49 	struct irdma_device *iwdev;
50 	struct ib_device *ibdev;
51 
52 	ibdev = ib_device_get_by_netdev(cdev_info->netdev, RDMA_DRIVER_IRDMA);
53 	if (WARN_ON(!ibdev))
54 		return;
55 
56 	iwdev = to_iwdev(ibdev);
57 	if (reset)
58 		iwdev->rf->reset = true;
59 
60 	iwdev->iw_status = 0;
61 	irdma_port_ibevent(iwdev);
62 	ib_unregister_device_and_put(ibdev);
63 	pr_debug("INIT: Gen1 PF[%d] close complete\n", PCI_FUNC(cdev_info->pcidev->devfn));
64 }
65 
66 static void i40iw_request_reset(struct irdma_pci_f *rf)
67 {
68 	struct i40e_info *cdev_info = rf->cdev;
69 
70 	cdev_info->ops->request_reset(cdev_info, &i40iw_client, 1);
71 }
72 
73 static void i40iw_fill_device_info(struct irdma_device *iwdev, struct i40e_info *cdev_info)
74 {
75 	struct irdma_pci_f *rf = iwdev->rf;
76 
77 	rf->rdma_ver = IRDMA_GEN_1;
78 	rf->gen_ops.request_reset = i40iw_request_reset;
79 	rf->pcidev = cdev_info->pcidev;
80 	rf->hw.hw_addr = cdev_info->hw_addr;
81 	rf->cdev = cdev_info;
82 	rf->msix_count = cdev_info->msix_count;
83 	rf->msix_entries = cdev_info->msix_entries;
84 	rf->limits_sel = 5;
85 	rf->protocol_used = IRDMA_IWARP_PROTOCOL_ONLY;
86 	rf->iwdev = iwdev;
87 
88 	iwdev->init_state = INITIAL_STATE;
89 	iwdev->rcv_wnd = IRDMA_CM_DEFAULT_RCV_WND_SCALED;
90 	iwdev->rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
91 	iwdev->netdev = cdev_info->netdev;
92 	iwdev->vsi_num = 0;
93 }
94 
95 /**
96  * i40iw_open - client interface operation open for iwarp/uda device
97  * @cdev_info: parent lan device information structure with data/ops
98  * @client: iwarp client information, provided during registration
99  *
100  * Called by the lan driver during the processing of client register
101  * Create device resources, set up queues, pble and hmc objects and
102  * register the device with the ib verbs interface
103  * Return 0 if successful, otherwise return error
104  */
105 static int i40iw_open(struct i40e_info *cdev_info, struct i40e_client *client)
106 {
107 	struct irdma_l2params l2params = {};
108 	struct irdma_device *iwdev;
109 	struct irdma_pci_f *rf;
110 	int err = -EIO;
111 	int i;
112 	u16 qset;
113 	u16 last_qset = IRDMA_NO_QSET;
114 
115 	iwdev = ib_alloc_device(irdma_device, ibdev);
116 	if (!iwdev)
117 		return -ENOMEM;
118 
119 	iwdev->rf = kzalloc(sizeof(*rf), GFP_KERNEL);
120 	if (!iwdev->rf) {
121 		ib_dealloc_device(&iwdev->ibdev);
122 		return -ENOMEM;
123 	}
124 
125 	i40iw_fill_device_info(iwdev, cdev_info);
126 	rf = iwdev->rf;
127 
128 	if (irdma_ctrl_init_hw(rf)) {
129 		err = -EIO;
130 		goto err_ctrl_init;
131 	}
132 
133 	l2params.mtu = (cdev_info->params.mtu) ? cdev_info->params.mtu : IRDMA_DEFAULT_MTU;
134 	for (i = 0; i < I40E_CLIENT_MAX_USER_PRIORITY; i++) {
135 		qset = cdev_info->params.qos.prio_qos[i].qs_handle;
136 		l2params.up2tc[i] = cdev_info->params.qos.prio_qos[i].tc;
137 		l2params.qs_handle_list[i] = qset;
138 		if (last_qset == IRDMA_NO_QSET)
139 			last_qset = qset;
140 		else if ((qset != last_qset) && (qset != IRDMA_NO_QSET))
141 			iwdev->dcb = true;
142 	}
143 
144 	if (irdma_rt_init_hw(iwdev, &l2params)) {
145 		err = -EIO;
146 		goto err_rt_init;
147 	}
148 
149 	err = irdma_ib_register_device(iwdev);
150 	if (err)
151 		goto err_ibreg;
152 
153 	ibdev_dbg(&iwdev->ibdev, "INIT: Gen1 PF[%d] open success\n",
154 		  PCI_FUNC(rf->pcidev->devfn));
155 
156 	return 0;
157 
158 err_ibreg:
159 	irdma_rt_deinit_hw(iwdev);
160 err_rt_init:
161 	irdma_ctrl_deinit_hw(rf);
162 err_ctrl_init:
163 	kfree(iwdev->rf);
164 	ib_dealloc_device(&iwdev->ibdev);
165 
166 	return err;
167 }
168 
169 /* client interface functions */
170 static const struct i40e_client_ops i40e_ops = {
171 	.open = i40iw_open,
172 	.close = i40iw_close,
173 	.l2_param_change = i40iw_l2param_change
174 };
175 
176 static struct i40e_client i40iw_client = {
177 	.ops = &i40e_ops,
178 	.type = I40E_CLIENT_IWARP,
179 };
180 
181 static int i40iw_probe(struct auxiliary_device *aux_dev, const struct auxiliary_device_id *id)
182 {
183 	struct i40e_auxiliary_device *i40e_adev = container_of(aux_dev,
184 							       struct i40e_auxiliary_device,
185 							       aux_dev);
186 	struct i40e_info *cdev_info = i40e_adev->ldev;
187 
188 	strncpy(i40iw_client.name, "irdma", I40E_CLIENT_STR_LENGTH);
189 	i40e_client_device_register(cdev_info, &i40iw_client);
190 
191 	return 0;
192 }
193 
194 static void i40iw_remove(struct auxiliary_device *aux_dev)
195 {
196 	struct i40e_auxiliary_device *i40e_adev = container_of(aux_dev,
197 							       struct i40e_auxiliary_device,
198 							       aux_dev);
199 	struct i40e_info *cdev_info = i40e_adev->ldev;
200 
201 	return i40e_client_device_unregister(cdev_info);
202 }
203 
204 static const struct auxiliary_device_id i40iw_auxiliary_id_table[] = {
205 	{.name = "i40e.iwarp", },
206 	{},
207 };
208 
209 MODULE_DEVICE_TABLE(auxiliary, i40iw_auxiliary_id_table);
210 
211 struct auxiliary_driver i40iw_auxiliary_drv = {
212 	.name = "gen_1",
213 	.id_table = i40iw_auxiliary_id_table,
214 	.probe = i40iw_probe,
215 	.remove = i40iw_remove,
216 };
217