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->pf_id = cdev_info->fid;
81 	rf->hw.hw_addr = cdev_info->hw_addr;
82 	rf->cdev = cdev_info;
83 	rf->msix_count = cdev_info->msix_count;
84 	rf->msix_entries = cdev_info->msix_entries;
85 	rf->limits_sel = 5;
86 	rf->protocol_used = IRDMA_IWARP_PROTOCOL_ONLY;
87 	rf->iwdev = iwdev;
88 
89 	iwdev->init_state = INITIAL_STATE;
90 	iwdev->rcv_wnd = IRDMA_CM_DEFAULT_RCV_WND_SCALED;
91 	iwdev->rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
92 	iwdev->netdev = cdev_info->netdev;
93 	iwdev->vsi_num = 0;
94 }
95 
96 /**
97  * i40iw_open - client interface operation open for iwarp/uda device
98  * @cdev_info: parent lan device information structure with data/ops
99  * @client: iwarp client information, provided during registration
100  *
101  * Called by the lan driver during the processing of client register
102  * Create device resources, set up queues, pble and hmc objects and
103  * register the device with the ib verbs interface
104  * Return 0 if successful, otherwise return error
105  */
106 static int i40iw_open(struct i40e_info *cdev_info, struct i40e_client *client)
107 {
108 	struct irdma_l2params l2params = {};
109 	struct irdma_device *iwdev;
110 	struct irdma_pci_f *rf;
111 	int err = -EIO;
112 	int i;
113 	u16 qset;
114 	u16 last_qset = IRDMA_NO_QSET;
115 
116 	iwdev = ib_alloc_device(irdma_device, ibdev);
117 	if (!iwdev)
118 		return -ENOMEM;
119 
120 	iwdev->rf = kzalloc(sizeof(*rf), GFP_KERNEL);
121 	if (!iwdev->rf) {
122 		ib_dealloc_device(&iwdev->ibdev);
123 		return -ENOMEM;
124 	}
125 
126 	i40iw_fill_device_info(iwdev, cdev_info);
127 	rf = iwdev->rf;
128 
129 	if (irdma_ctrl_init_hw(rf)) {
130 		err = -EIO;
131 		goto err_ctrl_init;
132 	}
133 
134 	l2params.mtu = (cdev_info->params.mtu) ? cdev_info->params.mtu : IRDMA_DEFAULT_MTU;
135 	for (i = 0; i < I40E_CLIENT_MAX_USER_PRIORITY; i++) {
136 		qset = cdev_info->params.qos.prio_qos[i].qs_handle;
137 		l2params.up2tc[i] = cdev_info->params.qos.prio_qos[i].tc;
138 		l2params.qs_handle_list[i] = qset;
139 		if (last_qset == IRDMA_NO_QSET)
140 			last_qset = qset;
141 		else if ((qset != last_qset) && (qset != IRDMA_NO_QSET))
142 			iwdev->dcb_vlan_mode = true;
143 	}
144 
145 	if (irdma_rt_init_hw(iwdev, &l2params)) {
146 		err = -EIO;
147 		goto err_rt_init;
148 	}
149 
150 	err = irdma_ib_register_device(iwdev);
151 	if (err)
152 		goto err_ibreg;
153 
154 	ibdev_dbg(&iwdev->ibdev, "INIT: Gen1 PF[%d] open success\n",
155 		  PCI_FUNC(rf->pcidev->devfn));
156 
157 	return 0;
158 
159 err_ibreg:
160 	irdma_rt_deinit_hw(iwdev);
161 err_rt_init:
162 	irdma_ctrl_deinit_hw(rf);
163 err_ctrl_init:
164 	kfree(iwdev->rf);
165 	ib_dealloc_device(&iwdev->ibdev);
166 
167 	return err;
168 }
169 
170 /* client interface functions */
171 static const struct i40e_client_ops i40e_ops = {
172 	.open = i40iw_open,
173 	.close = i40iw_close,
174 	.l2_param_change = i40iw_l2param_change
175 };
176 
177 static struct i40e_client i40iw_client = {
178 	.ops = &i40e_ops,
179 	.type = I40E_CLIENT_IWARP,
180 };
181 
182 static int i40iw_probe(struct auxiliary_device *aux_dev, const struct auxiliary_device_id *id)
183 {
184 	struct i40e_auxiliary_device *i40e_adev = container_of(aux_dev,
185 							       struct i40e_auxiliary_device,
186 							       aux_dev);
187 	struct i40e_info *cdev_info = i40e_adev->ldev;
188 
189 	strncpy(i40iw_client.name, "irdma", I40E_CLIENT_STR_LENGTH);
190 	i40e_client_device_register(cdev_info, &i40iw_client);
191 
192 	return 0;
193 }
194 
195 static void i40iw_remove(struct auxiliary_device *aux_dev)
196 {
197 	struct i40e_auxiliary_device *i40e_adev = container_of(aux_dev,
198 							       struct i40e_auxiliary_device,
199 							       aux_dev);
200 	struct i40e_info *cdev_info = i40e_adev->ldev;
201 
202 	i40e_client_device_unregister(cdev_info);
203 }
204 
205 static const struct auxiliary_device_id i40iw_auxiliary_id_table[] = {
206 	{.name = "i40e.iwarp", },
207 	{},
208 };
209 
210 MODULE_DEVICE_TABLE(auxiliary, i40iw_auxiliary_id_table);
211 
212 struct auxiliary_driver i40iw_auxiliary_drv = {
213 	.name = "gen_1",
214 	.id_table = i40iw_auxiliary_id_table,
215 	.probe = i40iw_probe,
216 	.remove = i40iw_remove,
217 };
218